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:
110 case -NFS4ERR_FILE_OPEN:
113 dprintk("%s could not handle NFSv4 error %d\n",
121 * This is our standard bitmap for GETATTR requests.
123 const u32 nfs4_fattr_bitmap[3] = {
125 | FATTR4_WORD0_CHANGE
128 | FATTR4_WORD0_FILEID,
130 | FATTR4_WORD1_NUMLINKS
132 | FATTR4_WORD1_OWNER_GROUP
133 | FATTR4_WORD1_RAWDEV
134 | FATTR4_WORD1_SPACE_USED
135 | FATTR4_WORD1_TIME_ACCESS
136 | FATTR4_WORD1_TIME_METADATA
137 | FATTR4_WORD1_TIME_MODIFY
140 static const u32 nfs4_pnfs_open_bitmap[3] = {
142 | FATTR4_WORD0_CHANGE
145 | FATTR4_WORD0_FILEID,
147 | FATTR4_WORD1_NUMLINKS
149 | FATTR4_WORD1_OWNER_GROUP
150 | FATTR4_WORD1_RAWDEV
151 | FATTR4_WORD1_SPACE_USED
152 | FATTR4_WORD1_TIME_ACCESS
153 | FATTR4_WORD1_TIME_METADATA
154 | FATTR4_WORD1_TIME_MODIFY,
155 FATTR4_WORD2_MDSTHRESHOLD
158 static const u32 nfs4_open_noattr_bitmap[3] = {
160 | FATTR4_WORD0_CHANGE
161 | FATTR4_WORD0_FILEID,
164 const u32 nfs4_statfs_bitmap[2] = {
165 FATTR4_WORD0_FILES_AVAIL
166 | FATTR4_WORD0_FILES_FREE
167 | FATTR4_WORD0_FILES_TOTAL,
168 FATTR4_WORD1_SPACE_AVAIL
169 | FATTR4_WORD1_SPACE_FREE
170 | FATTR4_WORD1_SPACE_TOTAL
173 const u32 nfs4_pathconf_bitmap[2] = {
175 | FATTR4_WORD0_MAXNAME,
179 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
180 | FATTR4_WORD0_MAXREAD
181 | FATTR4_WORD0_MAXWRITE
182 | FATTR4_WORD0_LEASE_TIME,
183 FATTR4_WORD1_TIME_DELTA
184 | FATTR4_WORD1_FS_LAYOUT_TYPES,
185 FATTR4_WORD2_LAYOUT_BLKSIZE
188 const u32 nfs4_fs_locations_bitmap[2] = {
190 | FATTR4_WORD0_CHANGE
193 | FATTR4_WORD0_FILEID
194 | FATTR4_WORD0_FS_LOCATIONS,
196 | FATTR4_WORD1_NUMLINKS
198 | FATTR4_WORD1_OWNER_GROUP
199 | FATTR4_WORD1_RAWDEV
200 | FATTR4_WORD1_SPACE_USED
201 | FATTR4_WORD1_TIME_ACCESS
202 | FATTR4_WORD1_TIME_METADATA
203 | FATTR4_WORD1_TIME_MODIFY
204 | FATTR4_WORD1_MOUNTED_ON_FILEID
207 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
208 struct nfs4_readdir_arg *readdir)
213 readdir->cookie = cookie;
214 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
219 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
224 * NFSv4 servers do not return entries for '.' and '..'
225 * Therefore, we fake these entries here. We let '.'
226 * have cookie 0 and '..' have cookie 1. Note that
227 * when talking to the server, we always send cookie 0
230 start = p = kmap_atomic(*readdir->pages);
233 *p++ = xdr_one; /* next */
234 *p++ = xdr_zero; /* cookie, first word */
235 *p++ = xdr_one; /* cookie, second word */
236 *p++ = xdr_one; /* entry len */
237 memcpy(p, ".\0\0\0", 4); /* entry */
239 *p++ = xdr_one; /* bitmap length */
240 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
241 *p++ = htonl(8); /* attribute buffer length */
242 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
245 *p++ = xdr_one; /* next */
246 *p++ = xdr_zero; /* cookie, first word */
247 *p++ = xdr_two; /* cookie, second word */
248 *p++ = xdr_two; /* entry len */
249 memcpy(p, "..\0\0", 4); /* entry */
251 *p++ = xdr_one; /* bitmap length */
252 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
253 *p++ = htonl(8); /* attribute buffer length */
254 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
256 readdir->pgbase = (char *)p - (char *)start;
257 readdir->count -= readdir->pgbase;
258 kunmap_atomic(start);
261 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
268 *timeout = NFS4_POLL_RETRY_MIN;
269 if (*timeout > NFS4_POLL_RETRY_MAX)
270 *timeout = NFS4_POLL_RETRY_MAX;
271 freezable_schedule_timeout_killable(*timeout);
272 if (fatal_signal_pending(current))
278 /* This is the error handling routine for processes that are allowed
281 static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
283 struct nfs_client *clp = server->nfs_client;
284 struct nfs4_state *state = exception->state;
285 struct inode *inode = exception->inode;
288 exception->retry = 0;
292 case -NFS4ERR_OPENMODE:
293 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
294 nfs4_inode_return_delegation(inode);
295 exception->retry = 1;
300 ret = nfs4_schedule_stateid_recovery(server, state);
303 goto wait_on_recovery;
304 case -NFS4ERR_DELEG_REVOKED:
305 case -NFS4ERR_ADMIN_REVOKED:
306 case -NFS4ERR_BAD_STATEID:
309 nfs_remove_bad_delegation(state->inode);
310 ret = nfs4_schedule_stateid_recovery(server, state);
313 goto wait_on_recovery;
314 case -NFS4ERR_EXPIRED:
316 ret = nfs4_schedule_stateid_recovery(server, state);
320 case -NFS4ERR_STALE_STATEID:
321 case -NFS4ERR_STALE_CLIENTID:
322 nfs4_schedule_lease_recovery(clp);
323 goto wait_on_recovery;
324 #if defined(CONFIG_NFS_V4_1)
325 case -NFS4ERR_BADSESSION:
326 case -NFS4ERR_BADSLOT:
327 case -NFS4ERR_BAD_HIGH_SLOT:
328 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
329 case -NFS4ERR_DEADSESSION:
330 case -NFS4ERR_SEQ_FALSE_RETRY:
331 case -NFS4ERR_SEQ_MISORDERED:
332 dprintk("%s ERROR: %d Reset session\n", __func__,
334 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
335 goto wait_on_recovery;
336 #endif /* defined(CONFIG_NFS_V4_1) */
337 case -NFS4ERR_FILE_OPEN:
338 if (exception->timeout > HZ) {
339 /* We have retried a decent amount, time to
347 ret = nfs4_delay(server->client, &exception->timeout);
350 case -NFS4ERR_RETRY_UNCACHED_REP:
351 case -NFS4ERR_OLD_STATEID:
352 exception->retry = 1;
354 case -NFS4ERR_BADOWNER:
355 /* The following works around a Linux server bug! */
356 case -NFS4ERR_BADNAME:
357 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
358 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
359 exception->retry = 1;
360 printk(KERN_WARNING "NFS: v4 server %s "
361 "does not accept raw "
363 "Reenabling the idmapper.\n",
364 server->nfs_client->cl_hostname);
367 /* We failed to handle the error */
368 return nfs4_map_errors(ret);
370 ret = nfs4_wait_clnt_recover(clp);
372 exception->retry = 1;
377 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
379 spin_lock(&clp->cl_lock);
380 if (time_before(clp->cl_last_renewal,timestamp))
381 clp->cl_last_renewal = timestamp;
382 spin_unlock(&clp->cl_lock);
385 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
387 do_renew_lease(server->nfs_client, timestamp);
390 #if defined(CONFIG_NFS_V4_1)
392 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
394 struct nfs4_session *session;
395 struct nfs4_slot_table *tbl;
396 bool send_new_highest_used_slotid = false;
399 /* just wake up the next guy waiting since
400 * we may have not consumed a slot after all */
401 dprintk("%s: No slot\n", __func__);
404 tbl = res->sr_slot->table;
405 session = tbl->session;
407 spin_lock(&tbl->slot_tbl_lock);
408 /* Be nice to the server: try to ensure that the last transmitted
409 * value for highest_user_slotid <= target_highest_slotid
411 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
412 send_new_highest_used_slotid = true;
414 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
415 send_new_highest_used_slotid = false;
418 nfs4_free_slot(tbl, res->sr_slot);
420 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
421 send_new_highest_used_slotid = false;
423 spin_unlock(&tbl->slot_tbl_lock);
425 if (send_new_highest_used_slotid)
426 nfs41_server_notify_highest_slotid_update(session->clp);
429 static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
431 struct nfs4_session *session;
432 struct nfs4_slot *slot;
433 struct nfs_client *clp;
434 bool interrupted = false;
437 /* don't increment the sequence number if the task wasn't sent */
438 if (!RPC_WAS_SENT(task))
442 session = slot->table->session;
444 if (slot->interrupted) {
445 slot->interrupted = 0;
449 /* Check the SEQUENCE operation status */
450 switch (res->sr_status) {
452 /* Update the slot's sequence and clientid lease timer */
455 do_renew_lease(clp, res->sr_timestamp);
456 /* Check sequence flags */
457 if (res->sr_status_flags != 0)
458 nfs4_schedule_lease_recovery(clp);
459 nfs41_update_target_slotid(slot->table, slot, res);
463 * sr_status remains 1 if an RPC level error occurred.
464 * The server may or may not have processed the sequence
466 * Mark the slot as having hosted an interrupted RPC call.
468 slot->interrupted = 1;
471 /* The server detected a resend of the RPC call and
472 * returned NFS4ERR_DELAY as per Section 2.10.6.2
475 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
480 case -NFS4ERR_BADSLOT:
482 * The slot id we used was probably retired. Try again
483 * using a different slot id.
486 case -NFS4ERR_SEQ_MISORDERED:
488 * Was the last operation on this sequence interrupted?
489 * If so, retry after bumping the sequence number.
496 * Could this slot have been previously retired?
497 * If so, then the server may be expecting seq_nr = 1!
499 if (slot->seq_nr != 1) {
504 case -NFS4ERR_SEQ_FALSE_RETRY:
508 /* Just update the slot sequence no. */
512 /* The session may be reset by one of the error handlers. */
513 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
514 nfs41_sequence_free_slot(res);
517 if (rpc_restart_call_prepare(task)) {
523 if (!rpc_restart_call(task))
525 rpc_delay(task, NFS4_POLL_RETRY_MAX);
529 static int nfs4_sequence_done(struct rpc_task *task,
530 struct nfs4_sequence_res *res)
532 if (res->sr_slot == NULL)
534 return nfs41_sequence_done(task, res);
537 static void nfs41_init_sequence(struct nfs4_sequence_args *args,
538 struct nfs4_sequence_res *res, int cache_reply)
540 args->sa_slot = NULL;
541 args->sa_cache_this = 0;
542 args->sa_privileged = 0;
544 args->sa_cache_this = 1;
548 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
550 args->sa_privileged = 1;
553 int nfs41_setup_sequence(struct nfs4_session *session,
554 struct nfs4_sequence_args *args,
555 struct nfs4_sequence_res *res,
556 struct rpc_task *task)
558 struct nfs4_slot *slot;
559 struct nfs4_slot_table *tbl;
561 dprintk("--> %s\n", __func__);
562 /* slot already allocated? */
563 if (res->sr_slot != NULL)
566 tbl = &session->fc_slot_table;
568 task->tk_timeout = 0;
570 spin_lock(&tbl->slot_tbl_lock);
571 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
572 !args->sa_privileged) {
573 /* The state manager will wait until the slot table is empty */
574 dprintk("%s session is draining\n", __func__);
578 slot = nfs4_alloc_slot(tbl);
580 /* If out of memory, try again in 1/4 second */
581 if (slot == ERR_PTR(-ENOMEM))
582 task->tk_timeout = HZ >> 2;
583 dprintk("<-- %s: no free slots\n", __func__);
586 spin_unlock(&tbl->slot_tbl_lock);
588 args->sa_slot = slot;
590 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
591 slot->slot_nr, slot->seq_nr);
594 res->sr_timestamp = jiffies;
595 res->sr_status_flags = 0;
597 * sr_status is only set in decode_sequence, and so will remain
598 * set to 1 if an rpc level failure occurs.
602 rpc_call_start(task);
605 /* Privileged tasks are queued with top priority */
606 if (args->sa_privileged)
607 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
608 NULL, RPC_PRIORITY_PRIVILEGED);
610 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
611 spin_unlock(&tbl->slot_tbl_lock);
614 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
616 int nfs4_setup_sequence(const struct nfs_server *server,
617 struct nfs4_sequence_args *args,
618 struct nfs4_sequence_res *res,
619 struct rpc_task *task)
621 struct nfs4_session *session = nfs4_get_session(server);
624 if (session == NULL) {
625 rpc_call_start(task);
629 dprintk("--> %s clp %p session %p sr_slot %d\n",
630 __func__, session->clp, session, res->sr_slot ?
631 res->sr_slot->slot_nr : -1);
633 ret = nfs41_setup_sequence(session, args, res, task);
635 dprintk("<-- %s status=%d\n", __func__, ret);
639 struct nfs41_call_sync_data {
640 const struct nfs_server *seq_server;
641 struct nfs4_sequence_args *seq_args;
642 struct nfs4_sequence_res *seq_res;
645 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
647 struct nfs41_call_sync_data *data = calldata;
648 struct nfs4_session *session = nfs4_get_session(data->seq_server);
650 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
652 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
655 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
657 struct nfs41_call_sync_data *data = calldata;
659 nfs41_sequence_done(task, data->seq_res);
662 static const struct rpc_call_ops nfs41_call_sync_ops = {
663 .rpc_call_prepare = nfs41_call_sync_prepare,
664 .rpc_call_done = nfs41_call_sync_done,
667 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
668 struct nfs_server *server,
669 struct rpc_message *msg,
670 struct nfs4_sequence_args *args,
671 struct nfs4_sequence_res *res)
674 struct rpc_task *task;
675 struct nfs41_call_sync_data data = {
676 .seq_server = server,
680 struct rpc_task_setup task_setup = {
683 .callback_ops = &nfs41_call_sync_ops,
684 .callback_data = &data
687 task = rpc_run_task(&task_setup);
691 ret = task->tk_status;
699 void nfs41_init_sequence(struct nfs4_sequence_args *args,
700 struct nfs4_sequence_res *res, int cache_reply)
704 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
709 static int nfs4_sequence_done(struct rpc_task *task,
710 struct nfs4_sequence_res *res)
714 #endif /* CONFIG_NFS_V4_1 */
717 int _nfs4_call_sync(struct rpc_clnt *clnt,
718 struct nfs_server *server,
719 struct rpc_message *msg,
720 struct nfs4_sequence_args *args,
721 struct nfs4_sequence_res *res)
723 return rpc_call_sync(clnt, msg, 0);
727 int nfs4_call_sync(struct rpc_clnt *clnt,
728 struct nfs_server *server,
729 struct rpc_message *msg,
730 struct nfs4_sequence_args *args,
731 struct nfs4_sequence_res *res,
734 nfs41_init_sequence(args, res, cache_reply);
735 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
739 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
741 struct nfs_inode *nfsi = NFS_I(dir);
743 spin_lock(&dir->i_lock);
744 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
745 if (!cinfo->atomic || cinfo->before != dir->i_version)
746 nfs_force_lookup_revalidate(dir);
747 dir->i_version = cinfo->after;
748 nfs_fscache_invalidate(dir);
749 spin_unlock(&dir->i_lock);
752 struct nfs4_opendata {
754 struct nfs_openargs o_arg;
755 struct nfs_openres o_res;
756 struct nfs_open_confirmargs c_arg;
757 struct nfs_open_confirmres c_res;
758 struct nfs4_string owner_name;
759 struct nfs4_string group_name;
760 struct nfs_fattr f_attr;
762 struct dentry *dentry;
763 struct nfs4_state_owner *owner;
764 struct nfs4_state *state;
766 unsigned long timestamp;
767 unsigned int rpc_done : 1;
772 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
773 int err, struct nfs4_exception *exception)
777 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
779 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
780 exception->retry = 1;
784 static enum open_claim_type4
785 nfs4_map_atomic_open_claim(struct nfs_server *server,
786 enum open_claim_type4 claim)
788 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
793 case NFS4_OPEN_CLAIM_FH:
794 return NFS4_OPEN_CLAIM_NULL;
795 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
796 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
797 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
798 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
802 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
804 p->o_res.f_attr = &p->f_attr;
805 p->o_res.seqid = p->o_arg.seqid;
806 p->c_res.seqid = p->c_arg.seqid;
807 p->o_res.server = p->o_arg.server;
808 p->o_res.access_request = p->o_arg.access;
809 nfs_fattr_init(&p->f_attr);
810 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
813 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
814 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
815 const struct iattr *attrs,
816 enum open_claim_type4 claim,
819 struct dentry *parent = dget_parent(dentry);
820 struct inode *dir = parent->d_inode;
821 struct nfs_server *server = NFS_SERVER(dir);
822 struct nfs4_opendata *p;
824 p = kzalloc(sizeof(*p), gfp_mask);
827 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
828 if (p->o_arg.seqid == NULL)
830 nfs_sb_active(dentry->d_sb);
831 p->dentry = dget(dentry);
834 atomic_inc(&sp->so_count);
835 p->o_arg.open_flags = flags;
836 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
837 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
838 * will return permission denied for all bits until close */
839 if (!(flags & O_EXCL)) {
840 /* ask server to check for all possible rights as results
842 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
843 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
845 p->o_arg.clientid = server->nfs_client->cl_clientid;
846 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
847 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
848 p->o_arg.name = &dentry->d_name;
849 p->o_arg.server = server;
850 p->o_arg.bitmask = server->attr_bitmask;
851 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
852 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
853 switch (p->o_arg.claim) {
854 case NFS4_OPEN_CLAIM_NULL:
855 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
856 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
857 p->o_arg.fh = NFS_FH(dir);
859 case NFS4_OPEN_CLAIM_PREVIOUS:
860 case NFS4_OPEN_CLAIM_FH:
861 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
862 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
863 p->o_arg.fh = NFS_FH(dentry->d_inode);
865 if (attrs != NULL && attrs->ia_valid != 0) {
868 p->o_arg.u.attrs = &p->attrs;
869 memcpy(&p->attrs, attrs, sizeof(p->attrs));
872 verf[1] = current->pid;
873 memcpy(p->o_arg.u.verifier.data, verf,
874 sizeof(p->o_arg.u.verifier.data));
876 p->c_arg.fh = &p->o_res.fh;
877 p->c_arg.stateid = &p->o_res.stateid;
878 p->c_arg.seqid = p->o_arg.seqid;
879 nfs4_init_opendata_res(p);
889 static void nfs4_opendata_free(struct kref *kref)
891 struct nfs4_opendata *p = container_of(kref,
892 struct nfs4_opendata, kref);
893 struct super_block *sb = p->dentry->d_sb;
895 nfs_free_seqid(p->o_arg.seqid);
896 if (p->state != NULL)
897 nfs4_put_open_state(p->state);
898 nfs4_put_state_owner(p->owner);
902 nfs_fattr_free_names(&p->f_attr);
906 static void nfs4_opendata_put(struct nfs4_opendata *p)
909 kref_put(&p->kref, nfs4_opendata_free);
912 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
916 ret = rpc_wait_for_completion_task(task);
920 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
924 if (open_mode & (O_EXCL|O_TRUNC))
926 switch (mode & (FMODE_READ|FMODE_WRITE)) {
928 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
929 && state->n_rdonly != 0;
932 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
933 && state->n_wronly != 0;
935 case FMODE_READ|FMODE_WRITE:
936 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
937 && state->n_rdwr != 0;
943 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
945 if (delegation == NULL)
947 if ((delegation->type & fmode) != fmode)
949 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
951 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
953 nfs_mark_delegation_referenced(delegation);
957 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
966 case FMODE_READ|FMODE_WRITE:
969 nfs4_state_set_mode_locked(state, state->state | fmode);
972 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
974 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
975 nfs4_stateid_copy(&state->stateid, stateid);
976 nfs4_stateid_copy(&state->open_stateid, stateid);
979 set_bit(NFS_O_RDONLY_STATE, &state->flags);
982 set_bit(NFS_O_WRONLY_STATE, &state->flags);
984 case FMODE_READ|FMODE_WRITE:
985 set_bit(NFS_O_RDWR_STATE, &state->flags);
989 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
991 write_seqlock(&state->seqlock);
992 nfs_set_open_stateid_locked(state, stateid, fmode);
993 write_sequnlock(&state->seqlock);
996 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
999 * Protect the call to nfs4_state_set_mode_locked and
1000 * serialise the stateid update
1002 write_seqlock(&state->seqlock);
1003 if (deleg_stateid != NULL) {
1004 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1005 set_bit(NFS_DELEGATED_STATE, &state->flags);
1007 if (open_stateid != NULL)
1008 nfs_set_open_stateid_locked(state, open_stateid, fmode);
1009 write_sequnlock(&state->seqlock);
1010 spin_lock(&state->owner->so_lock);
1011 update_open_stateflags(state, fmode);
1012 spin_unlock(&state->owner->so_lock);
1015 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
1017 struct nfs_inode *nfsi = NFS_I(state->inode);
1018 struct nfs_delegation *deleg_cur;
1021 fmode &= (FMODE_READ|FMODE_WRITE);
1024 deleg_cur = rcu_dereference(nfsi->delegation);
1025 if (deleg_cur == NULL)
1028 spin_lock(&deleg_cur->lock);
1029 if (nfsi->delegation != deleg_cur ||
1030 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
1031 (deleg_cur->type & fmode) != fmode)
1032 goto no_delegation_unlock;
1034 if (delegation == NULL)
1035 delegation = &deleg_cur->stateid;
1036 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1037 goto no_delegation_unlock;
1039 nfs_mark_delegation_referenced(deleg_cur);
1040 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1042 no_delegation_unlock:
1043 spin_unlock(&deleg_cur->lock);
1047 if (!ret && open_stateid != NULL) {
1048 __update_open_stateid(state, open_stateid, NULL, fmode);
1056 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1058 struct nfs_delegation *delegation;
1061 delegation = rcu_dereference(NFS_I(inode)->delegation);
1062 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1067 nfs4_inode_return_delegation(inode);
1070 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1072 struct nfs4_state *state = opendata->state;
1073 struct nfs_inode *nfsi = NFS_I(state->inode);
1074 struct nfs_delegation *delegation;
1075 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
1076 fmode_t fmode = opendata->o_arg.fmode;
1077 nfs4_stateid stateid;
1081 if (can_open_cached(state, fmode, open_mode)) {
1082 spin_lock(&state->owner->so_lock);
1083 if (can_open_cached(state, fmode, open_mode)) {
1084 update_open_stateflags(state, fmode);
1085 spin_unlock(&state->owner->so_lock);
1086 goto out_return_state;
1088 spin_unlock(&state->owner->so_lock);
1091 delegation = rcu_dereference(nfsi->delegation);
1092 if (!can_open_delegated(delegation, fmode)) {
1096 /* Save the delegation */
1097 nfs4_stateid_copy(&stateid, &delegation->stateid);
1099 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1104 /* Try to update the stateid using the delegation */
1105 if (update_open_stateid(state, NULL, &stateid, fmode))
1106 goto out_return_state;
1109 return ERR_PTR(ret);
1111 atomic_inc(&state->count);
1116 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1118 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1119 struct nfs_delegation *delegation;
1120 int delegation_flags = 0;
1123 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1125 delegation_flags = delegation->flags;
1127 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1128 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1129 "returning a delegation for "
1130 "OPEN(CLAIM_DELEGATE_CUR)\n",
1132 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1133 nfs_inode_set_delegation(state->inode,
1134 data->owner->so_cred,
1137 nfs_inode_reclaim_delegation(state->inode,
1138 data->owner->so_cred,
1143 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1144 * and update the nfs4_state.
1146 static struct nfs4_state *
1147 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1149 struct inode *inode = data->state->inode;
1150 struct nfs4_state *state = data->state;
1153 if (!data->rpc_done) {
1154 ret = data->rpc_status;
1159 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1160 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1161 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1165 state = nfs4_get_open_state(inode, data->owner);
1169 ret = nfs_refresh_inode(inode, &data->f_attr);
1173 if (data->o_res.delegation_type != 0)
1174 nfs4_opendata_check_deleg(data, state);
1175 update_open_stateid(state, &data->o_res.stateid, NULL,
1180 return ERR_PTR(ret);
1184 static struct nfs4_state *
1185 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1187 struct inode *inode;
1188 struct nfs4_state *state = NULL;
1191 if (!data->rpc_done) {
1192 state = nfs4_try_open_cached(data);
1197 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1199 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1200 ret = PTR_ERR(inode);
1204 state = nfs4_get_open_state(inode, data->owner);
1207 if (data->o_res.delegation_type != 0)
1208 nfs4_opendata_check_deleg(data, state);
1209 update_open_stateid(state, &data->o_res.stateid, NULL,
1213 nfs_release_seqid(data->o_arg.seqid);
1218 return ERR_PTR(ret);
1221 static struct nfs4_state *
1222 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1224 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1225 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1226 return _nfs4_opendata_to_nfs4_state(data);
1229 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1231 struct nfs_inode *nfsi = NFS_I(state->inode);
1232 struct nfs_open_context *ctx;
1234 spin_lock(&state->inode->i_lock);
1235 list_for_each_entry(ctx, &nfsi->open_files, list) {
1236 if (ctx->state != state)
1238 get_nfs_open_context(ctx);
1239 spin_unlock(&state->inode->i_lock);
1242 spin_unlock(&state->inode->i_lock);
1243 return ERR_PTR(-ENOENT);
1246 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1247 struct nfs4_state *state, enum open_claim_type4 claim)
1249 struct nfs4_opendata *opendata;
1251 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1252 NULL, claim, GFP_NOFS);
1253 if (opendata == NULL)
1254 return ERR_PTR(-ENOMEM);
1255 opendata->state = state;
1256 atomic_inc(&state->count);
1260 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1262 struct nfs4_state *newstate;
1265 opendata->o_arg.open_flags = 0;
1266 opendata->o_arg.fmode = fmode;
1267 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1268 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1269 nfs4_init_opendata_res(opendata);
1270 ret = _nfs4_recover_proc_open(opendata);
1273 newstate = nfs4_opendata_to_nfs4_state(opendata);
1274 if (IS_ERR(newstate))
1275 return PTR_ERR(newstate);
1276 nfs4_close_state(newstate, fmode);
1281 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1283 struct nfs4_state *newstate;
1286 /* memory barrier prior to reading state->n_* */
1287 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1289 if (state->n_rdwr != 0) {
1290 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1291 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1294 if (newstate != state)
1297 if (state->n_wronly != 0) {
1298 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1299 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1302 if (newstate != state)
1305 if (state->n_rdonly != 0) {
1306 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1307 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1310 if (newstate != state)
1314 * We may have performed cached opens for all three recoveries.
1315 * Check if we need to update the current stateid.
1317 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1318 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1319 write_seqlock(&state->seqlock);
1320 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1321 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1322 write_sequnlock(&state->seqlock);
1329 * reclaim state on the server after a reboot.
1331 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1333 struct nfs_delegation *delegation;
1334 struct nfs4_opendata *opendata;
1335 fmode_t delegation_type = 0;
1338 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1339 NFS4_OPEN_CLAIM_PREVIOUS);
1340 if (IS_ERR(opendata))
1341 return PTR_ERR(opendata);
1343 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1344 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1345 delegation_type = delegation->type;
1347 opendata->o_arg.u.delegation_type = delegation_type;
1348 status = nfs4_open_recover(opendata, state);
1349 nfs4_opendata_put(opendata);
1353 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1355 struct nfs_server *server = NFS_SERVER(state->inode);
1356 struct nfs4_exception exception = { };
1359 err = _nfs4_do_open_reclaim(ctx, state);
1360 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1362 if (err != -NFS4ERR_DELAY)
1364 nfs4_handle_exception(server, err, &exception);
1365 } while (exception.retry);
1369 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1371 struct nfs_open_context *ctx;
1374 ctx = nfs4_state_find_open_context(state);
1377 ret = nfs4_do_open_reclaim(ctx, state);
1378 put_nfs_open_context(ctx);
1382 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1384 struct nfs4_opendata *opendata;
1387 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1388 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1389 if (IS_ERR(opendata))
1390 return PTR_ERR(opendata);
1391 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1392 ret = nfs4_open_recover(opendata, state);
1393 nfs4_opendata_put(opendata);
1397 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1399 struct nfs4_exception exception = { };
1400 struct nfs_server *server = NFS_SERVER(state->inode);
1403 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1409 case -NFS4ERR_BADSESSION:
1410 case -NFS4ERR_BADSLOT:
1411 case -NFS4ERR_BAD_HIGH_SLOT:
1412 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1413 case -NFS4ERR_DEADSESSION:
1414 set_bit(NFS_DELEGATED_STATE, &state->flags);
1415 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1418 case -NFS4ERR_STALE_CLIENTID:
1419 case -NFS4ERR_STALE_STATEID:
1420 set_bit(NFS_DELEGATED_STATE, &state->flags);
1421 case -NFS4ERR_EXPIRED:
1422 /* Don't recall a delegation if it was lost */
1423 nfs4_schedule_lease_recovery(server->nfs_client);
1426 case -NFS4ERR_DELEG_REVOKED:
1427 case -NFS4ERR_ADMIN_REVOKED:
1428 case -NFS4ERR_BAD_STATEID:
1429 nfs_inode_find_state_and_recover(state->inode,
1431 nfs4_schedule_stateid_recovery(server, state);
1435 case -NFS4ERR_DELAY:
1436 case -NFS4ERR_GRACE:
1437 set_bit(NFS_DELEGATED_STATE, &state->flags);
1442 set_bit(NFS_DELEGATED_STATE, &state->flags);
1443 err = nfs4_handle_exception(server, err, &exception);
1444 } while (exception.retry);
1449 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1451 struct nfs4_opendata *data = calldata;
1453 data->rpc_status = task->tk_status;
1454 if (data->rpc_status == 0) {
1455 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1456 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1457 renew_lease(data->o_res.server, data->timestamp);
1462 static void nfs4_open_confirm_release(void *calldata)
1464 struct nfs4_opendata *data = calldata;
1465 struct nfs4_state *state = NULL;
1467 /* If this request hasn't been cancelled, do nothing */
1468 if (data->cancelled == 0)
1470 /* In case of error, no cleanup! */
1471 if (!data->rpc_done)
1473 state = nfs4_opendata_to_nfs4_state(data);
1475 nfs4_close_state(state, data->o_arg.fmode);
1477 nfs4_opendata_put(data);
1480 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1481 .rpc_call_done = nfs4_open_confirm_done,
1482 .rpc_release = nfs4_open_confirm_release,
1486 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1488 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1490 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1491 struct rpc_task *task;
1492 struct rpc_message msg = {
1493 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1494 .rpc_argp = &data->c_arg,
1495 .rpc_resp = &data->c_res,
1496 .rpc_cred = data->owner->so_cred,
1498 struct rpc_task_setup task_setup_data = {
1499 .rpc_client = server->client,
1500 .rpc_message = &msg,
1501 .callback_ops = &nfs4_open_confirm_ops,
1502 .callback_data = data,
1503 .workqueue = nfsiod_workqueue,
1504 .flags = RPC_TASK_ASYNC,
1508 kref_get(&data->kref);
1510 data->rpc_status = 0;
1511 data->timestamp = jiffies;
1512 task = rpc_run_task(&task_setup_data);
1514 return PTR_ERR(task);
1515 status = nfs4_wait_for_completion_rpc_task(task);
1517 data->cancelled = 1;
1520 status = data->rpc_status;
1525 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1527 struct nfs4_opendata *data = calldata;
1528 struct nfs4_state_owner *sp = data->owner;
1530 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1533 * Check if we still need to send an OPEN call, or if we can use
1534 * a delegation instead.
1536 if (data->state != NULL) {
1537 struct nfs_delegation *delegation;
1539 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1542 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1543 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1544 can_open_delegated(delegation, data->o_arg.fmode))
1545 goto unlock_no_action;
1548 /* Update client id. */
1549 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1550 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1551 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1552 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
1553 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1555 data->timestamp = jiffies;
1556 if (nfs4_setup_sequence(data->o_arg.server,
1557 &data->o_arg.seq_args,
1558 &data->o_res.seq_res,
1560 nfs_release_seqid(data->o_arg.seqid);
1565 task->tk_action = NULL;
1567 nfs4_sequence_done(task, &data->o_res.seq_res);
1570 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1572 struct nfs4_opendata *data = calldata;
1574 data->rpc_status = task->tk_status;
1576 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1579 if (task->tk_status == 0) {
1580 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1581 switch (data->o_res.f_attr->mode & S_IFMT) {
1585 data->rpc_status = -ELOOP;
1588 data->rpc_status = -EISDIR;
1591 data->rpc_status = -ENOTDIR;
1594 renew_lease(data->o_res.server, data->timestamp);
1595 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1596 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1601 static void nfs4_open_release(void *calldata)
1603 struct nfs4_opendata *data = calldata;
1604 struct nfs4_state *state = NULL;
1606 /* If this request hasn't been cancelled, do nothing */
1607 if (data->cancelled == 0)
1609 /* In case of error, no cleanup! */
1610 if (data->rpc_status != 0 || !data->rpc_done)
1612 /* In case we need an open_confirm, no cleanup! */
1613 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1615 state = nfs4_opendata_to_nfs4_state(data);
1617 nfs4_close_state(state, data->o_arg.fmode);
1619 nfs4_opendata_put(data);
1622 static const struct rpc_call_ops nfs4_open_ops = {
1623 .rpc_call_prepare = nfs4_open_prepare,
1624 .rpc_call_done = nfs4_open_done,
1625 .rpc_release = nfs4_open_release,
1628 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1630 struct inode *dir = data->dir->d_inode;
1631 struct nfs_server *server = NFS_SERVER(dir);
1632 struct nfs_openargs *o_arg = &data->o_arg;
1633 struct nfs_openres *o_res = &data->o_res;
1634 struct rpc_task *task;
1635 struct rpc_message msg = {
1636 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1639 .rpc_cred = data->owner->so_cred,
1641 struct rpc_task_setup task_setup_data = {
1642 .rpc_client = server->client,
1643 .rpc_message = &msg,
1644 .callback_ops = &nfs4_open_ops,
1645 .callback_data = data,
1646 .workqueue = nfsiod_workqueue,
1647 .flags = RPC_TASK_ASYNC,
1651 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1652 kref_get(&data->kref);
1654 data->rpc_status = 0;
1655 data->cancelled = 0;
1657 nfs4_set_sequence_privileged(&o_arg->seq_args);
1658 task = rpc_run_task(&task_setup_data);
1660 return PTR_ERR(task);
1661 status = nfs4_wait_for_completion_rpc_task(task);
1663 data->cancelled = 1;
1666 status = data->rpc_status;
1672 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1674 struct inode *dir = data->dir->d_inode;
1675 struct nfs_openres *o_res = &data->o_res;
1678 status = nfs4_run_open_task(data, 1);
1679 if (status != 0 || !data->rpc_done)
1682 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1684 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1685 status = _nfs4_proc_open_confirm(data);
1693 static int nfs4_opendata_access(struct rpc_cred *cred,
1694 struct nfs4_opendata *opendata,
1695 struct nfs4_state *state, fmode_t fmode,
1698 struct nfs_access_entry cache;
1701 /* access call failed or for some reason the server doesn't
1702 * support any access modes -- defer access call until later */
1703 if (opendata->o_res.access_supported == 0)
1707 /* don't check MAY_WRITE - a newly created file may not have
1708 * write mode bits, but POSIX allows the creating process to write.
1709 * use openflags to check for exec, because fmode won't
1710 * always have FMODE_EXEC set when file open for exec. */
1711 if (openflags & __FMODE_EXEC) {
1712 /* ONLY check for exec rights */
1714 } else if (fmode & FMODE_READ)
1718 cache.jiffies = jiffies;
1719 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1720 nfs_access_add_cache(state->inode, &cache);
1722 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
1725 /* even though OPEN succeeded, access is denied. Close the file */
1726 nfs4_close_state(state, fmode);
1731 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1733 static int _nfs4_proc_open(struct nfs4_opendata *data)
1735 struct inode *dir = data->dir->d_inode;
1736 struct nfs_server *server = NFS_SERVER(dir);
1737 struct nfs_openargs *o_arg = &data->o_arg;
1738 struct nfs_openres *o_res = &data->o_res;
1741 status = nfs4_run_open_task(data, 0);
1742 if (!data->rpc_done)
1745 if (status == -NFS4ERR_BADNAME &&
1746 !(o_arg->open_flags & O_CREAT))
1751 nfs_fattr_map_and_free_names(server, &data->f_attr);
1753 if (o_arg->open_flags & O_CREAT)
1754 update_changeattr(dir, &o_res->cinfo);
1755 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1756 server->caps &= ~NFS_CAP_POSIX_LOCK;
1757 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1758 status = _nfs4_proc_open_confirm(data);
1762 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1763 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1767 static int nfs4_recover_expired_lease(struct nfs_server *server)
1769 return nfs4_client_recover_expired_lease(server->nfs_client);
1774 * reclaim state on the server after a network partition.
1775 * Assumes caller holds the appropriate lock
1777 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1779 struct nfs4_opendata *opendata;
1782 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1783 NFS4_OPEN_CLAIM_FH);
1784 if (IS_ERR(opendata))
1785 return PTR_ERR(opendata);
1786 ret = nfs4_open_recover(opendata, state);
1788 d_drop(ctx->dentry);
1789 nfs4_opendata_put(opendata);
1793 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1795 struct nfs_server *server = NFS_SERVER(state->inode);
1796 struct nfs4_exception exception = { };
1800 err = _nfs4_open_expired(ctx, state);
1801 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1806 case -NFS4ERR_GRACE:
1807 case -NFS4ERR_DELAY:
1808 nfs4_handle_exception(server, err, &exception);
1811 } while (exception.retry);
1816 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1818 struct nfs_open_context *ctx;
1821 ctx = nfs4_state_find_open_context(state);
1824 ret = nfs4_do_open_expired(ctx, state);
1825 put_nfs_open_context(ctx);
1829 #if defined(CONFIG_NFS_V4_1)
1830 static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
1832 struct nfs_server *server = NFS_SERVER(state->inode);
1833 nfs4_stateid *stateid = &state->stateid;
1836 /* If a state reset has been done, test_stateid is unneeded */
1837 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1840 status = nfs41_test_stateid(server, stateid);
1841 if (status != NFS_OK) {
1842 /* Free the stateid unless the server explicitly
1843 * informs us the stateid is unrecognized. */
1844 if (status != -NFS4ERR_BAD_STATEID)
1845 nfs41_free_stateid(server, stateid);
1846 nfs_remove_bad_delegation(state->inode);
1848 write_seqlock(&state->seqlock);
1849 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1850 write_sequnlock(&state->seqlock);
1851 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1856 * nfs41_check_open_stateid - possibly free an open stateid
1858 * @state: NFSv4 state for an inode
1860 * Returns NFS_OK if recovery for this stateid is now finished.
1861 * Otherwise a negative NFS4ERR value is returned.
1863 static int nfs41_check_open_stateid(struct nfs4_state *state)
1865 struct nfs_server *server = NFS_SERVER(state->inode);
1866 nfs4_stateid *stateid = &state->open_stateid;
1869 /* If a state reset has been done, test_stateid is unneeded */
1870 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1871 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1872 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1873 return -NFS4ERR_BAD_STATEID;
1875 status = nfs41_test_stateid(server, stateid);
1876 if (status != NFS_OK) {
1877 /* Free the stateid unless the server explicitly
1878 * informs us the stateid is unrecognized. */
1879 if (status != -NFS4ERR_BAD_STATEID)
1880 nfs41_free_stateid(server, stateid);
1882 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1883 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1884 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1889 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1893 nfs41_clear_delegation_stateid(state);
1894 status = nfs41_check_open_stateid(state);
1895 if (status != NFS_OK)
1896 status = nfs4_open_expired(sp, state);
1902 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1903 * fields corresponding to attributes that were used to store the verifier.
1904 * Make sure we clobber those fields in the later setattr call
1906 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1908 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1909 !(sattr->ia_valid & ATTR_ATIME_SET))
1910 sattr->ia_valid |= ATTR_ATIME;
1912 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1913 !(sattr->ia_valid & ATTR_MTIME_SET))
1914 sattr->ia_valid |= ATTR_MTIME;
1917 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
1920 struct nfs4_state **res)
1922 struct nfs4_state_owner *sp = opendata->owner;
1923 struct nfs_server *server = sp->so_server;
1924 struct nfs4_state *state;
1928 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
1930 ret = _nfs4_proc_open(opendata);
1934 state = nfs4_opendata_to_nfs4_state(opendata);
1935 ret = PTR_ERR(state);
1938 if (server->caps & NFS_CAP_POSIX_LOCK)
1939 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1941 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
1945 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
1946 nfs4_schedule_stateid_recovery(server, state);
1953 * Returns a referenced nfs4_state
1955 static int _nfs4_do_open(struct inode *dir,
1956 struct dentry *dentry,
1959 struct iattr *sattr,
1960 struct rpc_cred *cred,
1961 struct nfs4_state **res,
1962 struct nfs4_threshold **ctx_th)
1964 struct nfs4_state_owner *sp;
1965 struct nfs4_state *state = NULL;
1966 struct nfs_server *server = NFS_SERVER(dir);
1967 struct nfs4_opendata *opendata;
1968 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1971 /* Protect against reboot recovery conflicts */
1973 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1975 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1978 status = nfs4_recover_expired_lease(server);
1980 goto err_put_state_owner;
1981 if (dentry->d_inode != NULL)
1982 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
1984 if (dentry->d_inode)
1985 claim = NFS4_OPEN_CLAIM_FH;
1986 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1988 if (opendata == NULL)
1989 goto err_put_state_owner;
1991 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1992 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1993 if (!opendata->f_attr.mdsthreshold)
1994 goto err_opendata_put;
1995 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
1997 if (dentry->d_inode != NULL)
1998 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
2000 status = _nfs4_open_and_get_state(opendata, fmode, flags, &state);
2002 goto err_opendata_put;
2004 if (opendata->o_arg.open_flags & O_EXCL) {
2005 nfs4_exclusive_attrset(opendata, sattr);
2007 nfs_fattr_init(opendata->o_res.f_attr);
2008 status = nfs4_do_setattr(state->inode, cred,
2009 opendata->o_res.f_attr, sattr,
2012 nfs_setattr_update_inode(state->inode, sattr);
2013 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2016 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2017 *ctx_th = opendata->f_attr.mdsthreshold;
2019 kfree(opendata->f_attr.mdsthreshold);
2020 opendata->f_attr.mdsthreshold = NULL;
2022 nfs4_opendata_put(opendata);
2023 nfs4_put_state_owner(sp);
2027 kfree(opendata->f_attr.mdsthreshold);
2028 nfs4_opendata_put(opendata);
2029 err_put_state_owner:
2030 nfs4_put_state_owner(sp);
2037 static struct nfs4_state *nfs4_do_open(struct inode *dir,
2038 struct dentry *dentry,
2041 struct iattr *sattr,
2042 struct rpc_cred *cred,
2043 struct nfs4_threshold **ctx_th)
2045 struct nfs_server *server = NFS_SERVER(dir);
2046 struct nfs4_exception exception = { };
2047 struct nfs4_state *res;
2050 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
2052 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
2056 /* NOTE: BAD_SEQID means the server and client disagree about the
2057 * book-keeping w.r.t. state-changing operations
2058 * (OPEN/CLOSE/LOCK/LOCKU...)
2059 * It is actually a sign of a bug on the client or on the server.
2061 * If we receive a BAD_SEQID error in the particular case of
2062 * doing an OPEN, we assume that nfs_increment_open_seqid() will
2063 * have unhashed the old state_owner for us, and that we can
2064 * therefore safely retry using a new one. We should still warn
2065 * the user though...
2067 if (status == -NFS4ERR_BAD_SEQID) {
2068 pr_warn_ratelimited("NFS: v4 server %s "
2069 " returned a bad sequence-id error!\n",
2070 NFS_SERVER(dir)->nfs_client->cl_hostname);
2071 exception.retry = 1;
2075 * BAD_STATEID on OPEN means that the server cancelled our
2076 * state before it received the OPEN_CONFIRM.
2077 * Recover by retrying the request as per the discussion
2078 * on Page 181 of RFC3530.
2080 if (status == -NFS4ERR_BAD_STATEID) {
2081 exception.retry = 1;
2084 if (status == -EAGAIN) {
2085 /* We must have found a delegation */
2086 exception.retry = 1;
2089 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2091 res = ERR_PTR(nfs4_handle_exception(server,
2092 status, &exception));
2093 } while (exception.retry);
2097 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2098 struct nfs_fattr *fattr, struct iattr *sattr,
2099 struct nfs4_state *state)
2101 struct nfs_server *server = NFS_SERVER(inode);
2102 struct nfs_setattrargs arg = {
2103 .fh = NFS_FH(inode),
2106 .bitmask = server->attr_bitmask,
2108 struct nfs_setattrres res = {
2112 struct rpc_message msg = {
2113 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2118 unsigned long timestamp = jiffies;
2121 nfs_fattr_init(fattr);
2123 if (state != NULL && nfs4_valid_open_stateid(state)) {
2124 struct nfs_lockowner lockowner = {
2125 .l_owner = current->files,
2126 .l_pid = current->tgid,
2128 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2130 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2132 /* Use that stateid */
2134 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
2136 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2137 if (status == 0 && state != NULL)
2138 renew_lease(server, timestamp);
2142 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2143 struct nfs_fattr *fattr, struct iattr *sattr,
2144 struct nfs4_state *state)
2146 struct nfs_server *server = NFS_SERVER(inode);
2147 struct nfs4_exception exception = {
2153 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2155 case -NFS4ERR_OPENMODE:
2156 if (state && !(state->state & FMODE_WRITE)) {
2158 if (sattr->ia_valid & ATTR_OPEN)
2163 err = nfs4_handle_exception(server, err, &exception);
2164 } while (exception.retry);
2169 struct nfs4_closedata {
2170 struct inode *inode;
2171 struct nfs4_state *state;
2172 struct nfs_closeargs arg;
2173 struct nfs_closeres res;
2174 struct nfs_fattr fattr;
2175 unsigned long timestamp;
2180 static void nfs4_free_closedata(void *data)
2182 struct nfs4_closedata *calldata = data;
2183 struct nfs4_state_owner *sp = calldata->state->owner;
2184 struct super_block *sb = calldata->state->inode->i_sb;
2187 pnfs_roc_release(calldata->state->inode);
2188 nfs4_put_open_state(calldata->state);
2189 nfs_free_seqid(calldata->arg.seqid);
2190 nfs4_put_state_owner(sp);
2191 nfs_sb_deactive(sb);
2195 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2198 spin_lock(&state->owner->so_lock);
2199 if (!(fmode & FMODE_READ))
2200 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2201 if (!(fmode & FMODE_WRITE))
2202 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2203 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2204 spin_unlock(&state->owner->so_lock);
2207 static void nfs4_close_done(struct rpc_task *task, void *data)
2209 struct nfs4_closedata *calldata = data;
2210 struct nfs4_state *state = calldata->state;
2211 struct nfs_server *server = NFS_SERVER(calldata->inode);
2213 dprintk("%s: begin!\n", __func__);
2214 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2216 /* hmm. we are done with the inode, and in the process of freeing
2217 * the state_owner. we keep this around to process errors
2219 switch (task->tk_status) {
2222 pnfs_roc_set_barrier(state->inode,
2223 calldata->roc_barrier);
2224 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
2225 renew_lease(server, calldata->timestamp);
2226 nfs4_close_clear_stateid_flags(state,
2227 calldata->arg.fmode);
2229 case -NFS4ERR_STALE_STATEID:
2230 case -NFS4ERR_OLD_STATEID:
2231 case -NFS4ERR_BAD_STATEID:
2232 case -NFS4ERR_EXPIRED:
2233 if (calldata->arg.fmode == 0)
2236 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2237 rpc_restart_call_prepare(task);
2239 nfs_release_seqid(calldata->arg.seqid);
2240 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2241 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2244 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2246 struct nfs4_closedata *calldata = data;
2247 struct nfs4_state *state = calldata->state;
2248 struct inode *inode = calldata->inode;
2251 dprintk("%s: begin!\n", __func__);
2252 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2255 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2256 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
2257 spin_lock(&state->owner->so_lock);
2258 /* Calculate the change in open mode */
2259 if (state->n_rdwr == 0) {
2260 if (state->n_rdonly == 0) {
2261 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2262 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2263 calldata->arg.fmode &= ~FMODE_READ;
2265 if (state->n_wronly == 0) {
2266 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2267 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2268 calldata->arg.fmode &= ~FMODE_WRITE;
2271 if (!nfs4_valid_open_stateid(state))
2273 spin_unlock(&state->owner->so_lock);
2276 /* Note: exit _without_ calling nfs4_close_done */
2280 if (calldata->arg.fmode == 0) {
2281 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2282 if (calldata->roc &&
2283 pnfs_roc_drain(inode, &calldata->roc_barrier, task))
2287 nfs_fattr_init(calldata->res.fattr);
2288 calldata->timestamp = jiffies;
2289 if (nfs4_setup_sequence(NFS_SERVER(inode),
2290 &calldata->arg.seq_args,
2291 &calldata->res.seq_res,
2293 nfs_release_seqid(calldata->arg.seqid);
2294 dprintk("%s: done!\n", __func__);
2297 task->tk_action = NULL;
2299 nfs4_sequence_done(task, &calldata->res.seq_res);
2302 static const struct rpc_call_ops nfs4_close_ops = {
2303 .rpc_call_prepare = nfs4_close_prepare,
2304 .rpc_call_done = nfs4_close_done,
2305 .rpc_release = nfs4_free_closedata,
2309 * It is possible for data to be read/written from a mem-mapped file
2310 * after the sys_close call (which hits the vfs layer as a flush).
2311 * This means that we can't safely call nfsv4 close on a file until
2312 * the inode is cleared. This in turn means that we are not good
2313 * NFSv4 citizens - we do not indicate to the server to update the file's
2314 * share state even when we are done with one of the three share
2315 * stateid's in the inode.
2317 * NOTE: Caller must be holding the sp->so_owner semaphore!
2319 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
2321 struct nfs_server *server = NFS_SERVER(state->inode);
2322 struct nfs4_closedata *calldata;
2323 struct nfs4_state_owner *sp = state->owner;
2324 struct rpc_task *task;
2325 struct rpc_message msg = {
2326 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2327 .rpc_cred = state->owner->so_cred,
2329 struct rpc_task_setup task_setup_data = {
2330 .rpc_client = server->client,
2331 .rpc_message = &msg,
2332 .callback_ops = &nfs4_close_ops,
2333 .workqueue = nfsiod_workqueue,
2334 .flags = RPC_TASK_ASYNC,
2336 int status = -ENOMEM;
2338 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2339 if (calldata == NULL)
2341 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2342 calldata->inode = state->inode;
2343 calldata->state = state;
2344 calldata->arg.fh = NFS_FH(state->inode);
2345 calldata->arg.stateid = &state->open_stateid;
2346 /* Serialization for the sequence id */
2347 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2348 if (calldata->arg.seqid == NULL)
2349 goto out_free_calldata;
2350 calldata->arg.fmode = 0;
2351 calldata->arg.bitmask = server->cache_consistency_bitmask;
2352 calldata->res.fattr = &calldata->fattr;
2353 calldata->res.seqid = calldata->arg.seqid;
2354 calldata->res.server = server;
2355 calldata->roc = pnfs_roc(state->inode);
2356 nfs_sb_active(calldata->inode->i_sb);
2358 msg.rpc_argp = &calldata->arg;
2359 msg.rpc_resp = &calldata->res;
2360 task_setup_data.callback_data = calldata;
2361 task = rpc_run_task(&task_setup_data);
2363 return PTR_ERR(task);
2366 status = rpc_wait_for_completion_task(task);
2372 nfs4_put_open_state(state);
2373 nfs4_put_state_owner(sp);
2377 static struct inode *
2378 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2380 struct nfs4_state *state;
2382 /* Protect against concurrent sillydeletes */
2383 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2384 ctx->cred, &ctx->mdsthreshold);
2386 return ERR_CAST(state);
2388 return igrab(state->inode);
2391 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2393 if (ctx->state == NULL)
2396 nfs4_close_sync(ctx->state, ctx->mode);
2398 nfs4_close_state(ctx->state, ctx->mode);
2401 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2403 struct nfs4_server_caps_arg args = {
2406 struct nfs4_server_caps_res res = {};
2407 struct rpc_message msg = {
2408 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2414 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2416 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2417 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2418 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2419 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2420 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2421 NFS_CAP_CTIME|NFS_CAP_MTIME);
2422 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2423 server->caps |= NFS_CAP_ACLS;
2424 if (res.has_links != 0)
2425 server->caps |= NFS_CAP_HARDLINKS;
2426 if (res.has_symlinks != 0)
2427 server->caps |= NFS_CAP_SYMLINKS;
2428 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2429 server->caps |= NFS_CAP_FILEID;
2430 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2431 server->caps |= NFS_CAP_MODE;
2432 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2433 server->caps |= NFS_CAP_NLINK;
2434 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2435 server->caps |= NFS_CAP_OWNER;
2436 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2437 server->caps |= NFS_CAP_OWNER_GROUP;
2438 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2439 server->caps |= NFS_CAP_ATIME;
2440 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2441 server->caps |= NFS_CAP_CTIME;
2442 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2443 server->caps |= NFS_CAP_MTIME;
2445 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2446 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2447 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2448 server->acl_bitmask = res.acl_bitmask;
2449 server->fh_expire_type = res.fh_expire_type;
2455 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2457 struct nfs4_exception exception = { };
2460 err = nfs4_handle_exception(server,
2461 _nfs4_server_capabilities(server, fhandle),
2463 } while (exception.retry);
2467 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2468 struct nfs_fsinfo *info)
2470 struct nfs4_lookup_root_arg args = {
2471 .bitmask = nfs4_fattr_bitmap,
2473 struct nfs4_lookup_res res = {
2475 .fattr = info->fattr,
2478 struct rpc_message msg = {
2479 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2484 nfs_fattr_init(info->fattr);
2485 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2488 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2489 struct nfs_fsinfo *info)
2491 struct nfs4_exception exception = { };
2494 err = _nfs4_lookup_root(server, fhandle, info);
2497 case -NFS4ERR_WRONGSEC:
2500 err = nfs4_handle_exception(server, err, &exception);
2502 } while (exception.retry);
2507 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2508 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2510 struct rpc_auth *auth;
2513 auth = rpcauth_create(flavor, server->client);
2518 ret = nfs4_lookup_root(server, fhandle, info);
2523 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2524 struct nfs_fsinfo *info)
2526 int i, len, status = 0;
2527 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
2529 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
2533 for (i = 0; i < len; i++) {
2534 /* AUTH_UNIX is the default flavor if none was specified,
2535 * thus has already been tried. */
2536 if (flav_array[i] == RPC_AUTH_UNIX)
2539 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2540 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2545 * -EACCESS could mean that the user doesn't have correct permissions
2546 * to access the mount. It could also mean that we tried to mount
2547 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2548 * existing mount programs don't handle -EACCES very well so it should
2549 * be mapped to -EPERM instead.
2551 if (status == -EACCES)
2557 * get the file handle for the "/" directory on the server
2559 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2560 struct nfs_fsinfo *info)
2562 int minor_version = server->nfs_client->cl_minorversion;
2563 int status = nfs4_lookup_root(server, fhandle, info);
2564 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2566 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2567 * by nfs4_map_errors() as this function exits.
2569 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
2571 status = nfs4_server_capabilities(server, fhandle);
2573 status = nfs4_do_fsinfo(server, fhandle, info);
2574 return nfs4_map_errors(status);
2577 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2578 struct nfs_fsinfo *info)
2581 struct nfs_fattr *fattr = info->fattr;
2583 error = nfs4_server_capabilities(server, mntfh);
2585 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2589 error = nfs4_proc_getattr(server, mntfh, fattr);
2591 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2595 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2596 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2597 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2603 * Get locations and (maybe) other attributes of a referral.
2604 * Note that we'll actually follow the referral later when
2605 * we detect fsid mismatch in inode revalidation
2607 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2608 const struct qstr *name, struct nfs_fattr *fattr,
2609 struct nfs_fh *fhandle)
2611 int status = -ENOMEM;
2612 struct page *page = NULL;
2613 struct nfs4_fs_locations *locations = NULL;
2615 page = alloc_page(GFP_KERNEL);
2618 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2619 if (locations == NULL)
2622 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
2625 /* Make sure server returned a different fsid for the referral */
2626 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2627 dprintk("%s: server did not return a different fsid for"
2628 " a referral at %s\n", __func__, name->name);
2632 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2633 nfs_fixup_referral_attributes(&locations->fattr);
2635 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2636 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2637 memset(fhandle, 0, sizeof(struct nfs_fh));
2645 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2647 struct nfs4_getattr_arg args = {
2649 .bitmask = server->attr_bitmask,
2651 struct nfs4_getattr_res res = {
2655 struct rpc_message msg = {
2656 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2661 nfs_fattr_init(fattr);
2662 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2665 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2667 struct nfs4_exception exception = { };
2670 err = nfs4_handle_exception(server,
2671 _nfs4_proc_getattr(server, fhandle, fattr),
2673 } while (exception.retry);
2678 * The file is not closed if it is opened due to the a request to change
2679 * the size of the file. The open call will not be needed once the
2680 * VFS layer lookup-intents are implemented.
2682 * Close is called when the inode is destroyed.
2683 * If we haven't opened the file for O_WRONLY, we
2684 * need to in the size_change case to obtain a stateid.
2687 * Because OPEN is always done by name in nfsv4, it is
2688 * possible that we opened a different file by the same
2689 * name. We can recognize this race condition, but we
2690 * can't do anything about it besides returning an error.
2692 * This will be fixed with VFS changes (lookup-intent).
2695 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2696 struct iattr *sattr)
2698 struct inode *inode = dentry->d_inode;
2699 struct rpc_cred *cred = NULL;
2700 struct nfs4_state *state = NULL;
2703 if (pnfs_ld_layoutret_on_setattr(inode))
2704 pnfs_commit_and_return_layout(inode);
2706 nfs_fattr_init(fattr);
2708 /* Deal with open(O_TRUNC) */
2709 if (sattr->ia_valid & ATTR_OPEN)
2710 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2712 /* Optimization: if the end result is no change, don't RPC */
2713 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2716 /* Search for an existing open(O_WRITE) file */
2717 if (sattr->ia_valid & ATTR_FILE) {
2718 struct nfs_open_context *ctx;
2720 ctx = nfs_file_open_context(sattr->ia_file);
2727 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2729 nfs_setattr_update_inode(inode, sattr);
2733 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2734 const struct qstr *name, struct nfs_fh *fhandle,
2735 struct nfs_fattr *fattr)
2737 struct nfs_server *server = NFS_SERVER(dir);
2739 struct nfs4_lookup_arg args = {
2740 .bitmask = server->attr_bitmask,
2741 .dir_fh = NFS_FH(dir),
2744 struct nfs4_lookup_res res = {
2749 struct rpc_message msg = {
2750 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2755 nfs_fattr_init(fattr);
2757 dprintk("NFS call lookup %s\n", name->name);
2758 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2759 dprintk("NFS reply lookup: %d\n", status);
2763 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
2765 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2766 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
2767 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2771 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2772 struct qstr *name, struct nfs_fh *fhandle,
2773 struct nfs_fattr *fattr)
2775 struct nfs4_exception exception = { };
2776 struct rpc_clnt *client = *clnt;
2779 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2781 case -NFS4ERR_BADNAME:
2784 case -NFS4ERR_MOVED:
2785 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
2787 case -NFS4ERR_WRONGSEC:
2789 if (client != *clnt)
2792 client = nfs4_create_sec_client(client, dir, name);
2794 return PTR_ERR(client);
2796 exception.retry = 1;
2799 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
2801 } while (exception.retry);
2806 else if (client != *clnt)
2807 rpc_shutdown_client(client);
2812 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
2813 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2816 struct rpc_clnt *client = NFS_CLIENT(dir);
2818 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2819 if (client != NFS_CLIENT(dir)) {
2820 rpc_shutdown_client(client);
2821 nfs_fixup_secinfo_attributes(fattr);
2827 nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2828 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2831 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2833 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2835 rpc_shutdown_client(client);
2836 return ERR_PTR(status);
2841 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2843 struct nfs_server *server = NFS_SERVER(inode);
2844 struct nfs4_accessargs args = {
2845 .fh = NFS_FH(inode),
2846 .bitmask = server->cache_consistency_bitmask,
2848 struct nfs4_accessres res = {
2851 struct rpc_message msg = {
2852 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2855 .rpc_cred = entry->cred,
2857 int mode = entry->mask;
2861 * Determine which access bits we want to ask for...
2863 if (mode & MAY_READ)
2864 args.access |= NFS4_ACCESS_READ;
2865 if (S_ISDIR(inode->i_mode)) {
2866 if (mode & MAY_WRITE)
2867 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2868 if (mode & MAY_EXEC)
2869 args.access |= NFS4_ACCESS_LOOKUP;
2871 if (mode & MAY_WRITE)
2872 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2873 if (mode & MAY_EXEC)
2874 args.access |= NFS4_ACCESS_EXECUTE;
2877 res.fattr = nfs_alloc_fattr();
2878 if (res.fattr == NULL)
2881 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2883 nfs_access_set_mask(entry, res.access);
2884 nfs_refresh_inode(inode, res.fattr);
2886 nfs_free_fattr(res.fattr);
2890 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2892 struct nfs4_exception exception = { };
2895 err = nfs4_handle_exception(NFS_SERVER(inode),
2896 _nfs4_proc_access(inode, entry),
2898 } while (exception.retry);
2903 * TODO: For the time being, we don't try to get any attributes
2904 * along with any of the zero-copy operations READ, READDIR,
2907 * In the case of the first three, we want to put the GETATTR
2908 * after the read-type operation -- this is because it is hard
2909 * to predict the length of a GETATTR response in v4, and thus
2910 * align the READ data correctly. This means that the GETATTR
2911 * may end up partially falling into the page cache, and we should
2912 * shift it into the 'tail' of the xdr_buf before processing.
2913 * To do this efficiently, we need to know the total length
2914 * of data received, which doesn't seem to be available outside
2917 * In the case of WRITE, we also want to put the GETATTR after
2918 * the operation -- in this case because we want to make sure
2919 * we get the post-operation mtime and size.
2921 * Both of these changes to the XDR layer would in fact be quite
2922 * minor, but I decided to leave them for a subsequent patch.
2924 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2925 unsigned int pgbase, unsigned int pglen)
2927 struct nfs4_readlink args = {
2928 .fh = NFS_FH(inode),
2933 struct nfs4_readlink_res res;
2934 struct rpc_message msg = {
2935 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2940 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
2943 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2944 unsigned int pgbase, unsigned int pglen)
2946 struct nfs4_exception exception = { };
2949 err = nfs4_handle_exception(NFS_SERVER(inode),
2950 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2952 } while (exception.retry);
2957 * This is just for mknod. open(O_CREAT) will always do ->open_context().
2960 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2963 struct nfs_open_context *ctx;
2964 struct nfs4_state *state;
2967 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2969 return PTR_ERR(ctx);
2971 sattr->ia_mode &= ~current_umask();
2972 state = nfs4_do_open(dir, dentry, ctx->mode,
2973 flags, sattr, ctx->cred,
2974 &ctx->mdsthreshold);
2976 if (IS_ERR(state)) {
2977 status = PTR_ERR(state);
2980 d_add(dentry, igrab(state->inode));
2981 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2984 put_nfs_open_context(ctx);
2988 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2990 struct nfs_server *server = NFS_SERVER(dir);
2991 struct nfs_removeargs args = {
2995 struct nfs_removeres res = {
2998 struct rpc_message msg = {
2999 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3005 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
3007 update_changeattr(dir, &res.cinfo);
3011 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3013 struct nfs4_exception exception = { };
3016 err = nfs4_handle_exception(NFS_SERVER(dir),
3017 _nfs4_proc_remove(dir, name),
3019 } while (exception.retry);
3023 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
3025 struct nfs_server *server = NFS_SERVER(dir);
3026 struct nfs_removeargs *args = msg->rpc_argp;
3027 struct nfs_removeres *res = msg->rpc_resp;
3029 res->server = server;
3030 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
3031 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
3034 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3036 nfs4_setup_sequence(NFS_SERVER(data->dir),
3037 &data->args.seq_args,
3042 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
3044 struct nfs_removeres *res = task->tk_msg.rpc_resp;
3046 if (!nfs4_sequence_done(task, &res->seq_res))
3048 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3050 update_changeattr(dir, &res->cinfo);
3054 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3056 struct nfs_server *server = NFS_SERVER(dir);
3057 struct nfs_renameargs *arg = msg->rpc_argp;
3058 struct nfs_renameres *res = msg->rpc_resp;
3060 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
3061 res->server = server;
3062 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
3065 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3067 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3068 &data->args.seq_args,
3073 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3074 struct inode *new_dir)
3076 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3078 if (!nfs4_sequence_done(task, &res->seq_res))
3080 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3083 update_changeattr(old_dir, &res->old_cinfo);
3084 update_changeattr(new_dir, &res->new_cinfo);
3088 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3089 struct inode *new_dir, struct qstr *new_name)
3091 struct nfs_server *server = NFS_SERVER(old_dir);
3092 struct nfs_renameargs arg = {
3093 .old_dir = NFS_FH(old_dir),
3094 .new_dir = NFS_FH(new_dir),
3095 .old_name = old_name,
3096 .new_name = new_name,
3098 struct nfs_renameres res = {
3101 struct rpc_message msg = {
3102 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3106 int status = -ENOMEM;
3108 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3110 update_changeattr(old_dir, &res.old_cinfo);
3111 update_changeattr(new_dir, &res.new_cinfo);
3116 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3117 struct inode *new_dir, struct qstr *new_name)
3119 struct nfs4_exception exception = { };
3122 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3123 _nfs4_proc_rename(old_dir, old_name,
3126 } while (exception.retry);
3130 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3132 struct nfs_server *server = NFS_SERVER(inode);
3133 struct nfs4_link_arg arg = {
3134 .fh = NFS_FH(inode),
3135 .dir_fh = NFS_FH(dir),
3137 .bitmask = server->attr_bitmask,
3139 struct nfs4_link_res res = {
3142 struct rpc_message msg = {
3143 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3147 int status = -ENOMEM;
3149 res.fattr = nfs_alloc_fattr();
3150 if (res.fattr == NULL)
3153 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3155 update_changeattr(dir, &res.cinfo);
3156 nfs_post_op_update_inode(inode, res.fattr);
3159 nfs_free_fattr(res.fattr);
3163 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3165 struct nfs4_exception exception = { };
3168 err = nfs4_handle_exception(NFS_SERVER(inode),
3169 _nfs4_proc_link(inode, dir, name),
3171 } while (exception.retry);
3175 struct nfs4_createdata {
3176 struct rpc_message msg;
3177 struct nfs4_create_arg arg;
3178 struct nfs4_create_res res;
3180 struct nfs_fattr fattr;
3183 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3184 struct qstr *name, struct iattr *sattr, u32 ftype)
3186 struct nfs4_createdata *data;
3188 data = kzalloc(sizeof(*data), GFP_KERNEL);
3190 struct nfs_server *server = NFS_SERVER(dir);
3192 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3193 data->msg.rpc_argp = &data->arg;
3194 data->msg.rpc_resp = &data->res;
3195 data->arg.dir_fh = NFS_FH(dir);
3196 data->arg.server = server;
3197 data->arg.name = name;
3198 data->arg.attrs = sattr;
3199 data->arg.ftype = ftype;
3200 data->arg.bitmask = server->attr_bitmask;
3201 data->res.server = server;
3202 data->res.fh = &data->fh;
3203 data->res.fattr = &data->fattr;
3204 nfs_fattr_init(data->res.fattr);
3209 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3211 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3212 &data->arg.seq_args, &data->res.seq_res, 1);
3214 update_changeattr(dir, &data->res.dir_cinfo);
3215 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3220 static void nfs4_free_createdata(struct nfs4_createdata *data)
3225 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3226 struct page *page, unsigned int len, struct iattr *sattr)
3228 struct nfs4_createdata *data;
3229 int status = -ENAMETOOLONG;
3231 if (len > NFS4_MAXPATHLEN)
3235 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3239 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3240 data->arg.u.symlink.pages = &page;
3241 data->arg.u.symlink.len = len;
3243 status = nfs4_do_create(dir, dentry, data);
3245 nfs4_free_createdata(data);
3250 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3251 struct page *page, unsigned int len, struct iattr *sattr)
3253 struct nfs4_exception exception = { };
3256 err = nfs4_handle_exception(NFS_SERVER(dir),
3257 _nfs4_proc_symlink(dir, dentry, page,
3260 } while (exception.retry);
3264 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3265 struct iattr *sattr)
3267 struct nfs4_createdata *data;
3268 int status = -ENOMEM;
3270 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3274 status = nfs4_do_create(dir, dentry, data);
3276 nfs4_free_createdata(data);
3281 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3282 struct iattr *sattr)
3284 struct nfs4_exception exception = { };
3287 sattr->ia_mode &= ~current_umask();
3289 err = nfs4_handle_exception(NFS_SERVER(dir),
3290 _nfs4_proc_mkdir(dir, dentry, sattr),
3292 } while (exception.retry);
3296 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3297 u64 cookie, struct page **pages, unsigned int count, int plus)
3299 struct inode *dir = dentry->d_inode;
3300 struct nfs4_readdir_arg args = {
3305 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3308 struct nfs4_readdir_res res;
3309 struct rpc_message msg = {
3310 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3317 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3318 dentry->d_parent->d_name.name,
3319 dentry->d_name.name,
3320 (unsigned long long)cookie);
3321 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
3322 res.pgbase = args.pgbase;
3323 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3325 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
3326 status += args.pgbase;
3329 nfs_invalidate_atime(dir);
3331 dprintk("%s: returns %d\n", __func__, status);
3335 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3336 u64 cookie, struct page **pages, unsigned int count, int plus)
3338 struct nfs4_exception exception = { };
3341 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3342 _nfs4_proc_readdir(dentry, cred, cookie,
3343 pages, count, plus),
3345 } while (exception.retry);
3349 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3350 struct iattr *sattr, dev_t rdev)
3352 struct nfs4_createdata *data;
3353 int mode = sattr->ia_mode;
3354 int status = -ENOMEM;
3356 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3361 data->arg.ftype = NF4FIFO;
3362 else if (S_ISBLK(mode)) {
3363 data->arg.ftype = NF4BLK;
3364 data->arg.u.device.specdata1 = MAJOR(rdev);
3365 data->arg.u.device.specdata2 = MINOR(rdev);
3367 else if (S_ISCHR(mode)) {
3368 data->arg.ftype = NF4CHR;
3369 data->arg.u.device.specdata1 = MAJOR(rdev);
3370 data->arg.u.device.specdata2 = MINOR(rdev);
3371 } else if (!S_ISSOCK(mode)) {
3376 status = nfs4_do_create(dir, dentry, data);
3378 nfs4_free_createdata(data);
3383 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3384 struct iattr *sattr, dev_t rdev)
3386 struct nfs4_exception exception = { };
3389 sattr->ia_mode &= ~current_umask();
3391 err = nfs4_handle_exception(NFS_SERVER(dir),
3392 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3394 } while (exception.retry);
3398 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3399 struct nfs_fsstat *fsstat)
3401 struct nfs4_statfs_arg args = {
3403 .bitmask = server->attr_bitmask,
3405 struct nfs4_statfs_res res = {
3408 struct rpc_message msg = {
3409 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3414 nfs_fattr_init(fsstat->fattr);
3415 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3418 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3420 struct nfs4_exception exception = { };
3423 err = nfs4_handle_exception(server,
3424 _nfs4_proc_statfs(server, fhandle, fsstat),
3426 } while (exception.retry);
3430 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3431 struct nfs_fsinfo *fsinfo)
3433 struct nfs4_fsinfo_arg args = {
3435 .bitmask = server->attr_bitmask,
3437 struct nfs4_fsinfo_res res = {
3440 struct rpc_message msg = {
3441 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3446 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3449 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3451 struct nfs4_exception exception = { };
3455 err = nfs4_handle_exception(server,
3456 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3458 } while (exception.retry);
3462 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3466 nfs_fattr_init(fsinfo->fattr);
3467 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
3469 /* block layout checks this! */
3470 server->pnfs_blksize = fsinfo->blksize;
3471 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
3477 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3478 struct nfs_pathconf *pathconf)
3480 struct nfs4_pathconf_arg args = {
3482 .bitmask = server->attr_bitmask,
3484 struct nfs4_pathconf_res res = {
3485 .pathconf = pathconf,
3487 struct rpc_message msg = {
3488 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3493 /* None of the pathconf attributes are mandatory to implement */
3494 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3495 memset(pathconf, 0, sizeof(*pathconf));
3499 nfs_fattr_init(pathconf->fattr);
3500 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3503 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3504 struct nfs_pathconf *pathconf)
3506 struct nfs4_exception exception = { };
3510 err = nfs4_handle_exception(server,
3511 _nfs4_proc_pathconf(server, fhandle, pathconf),
3513 } while (exception.retry);
3517 int nfs4_set_rw_stateid(nfs4_stateid *stateid,
3518 const struct nfs_open_context *ctx,
3519 const struct nfs_lock_context *l_ctx,
3522 const struct nfs_lockowner *lockowner = NULL;
3525 lockowner = &l_ctx->lockowner;
3526 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
3528 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3530 static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3531 const struct nfs_open_context *ctx,
3532 const struct nfs_lock_context *l_ctx,
3535 nfs4_stateid current_stateid;
3537 if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode))
3539 return nfs4_stateid_match(stateid, ¤t_stateid);
3542 static bool nfs4_error_stateid_expired(int err)
3545 case -NFS4ERR_DELEG_REVOKED:
3546 case -NFS4ERR_ADMIN_REVOKED:
3547 case -NFS4ERR_BAD_STATEID:
3548 case -NFS4ERR_STALE_STATEID:
3549 case -NFS4ERR_OLD_STATEID:
3550 case -NFS4ERR_OPENMODE:
3551 case -NFS4ERR_EXPIRED:
3557 void __nfs4_read_done_cb(struct nfs_read_data *data)
3559 nfs_invalidate_atime(data->header->inode);
3562 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3564 struct nfs_server *server = NFS_SERVER(data->header->inode);
3566 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3567 rpc_restart_call_prepare(task);
3571 __nfs4_read_done_cb(data);
3572 if (task->tk_status > 0)
3573 renew_lease(server, data->timestamp);
3577 static bool nfs4_read_stateid_changed(struct rpc_task *task,
3578 struct nfs_readargs *args)
3581 if (!nfs4_error_stateid_expired(task->tk_status) ||
3582 nfs4_stateid_is_current(&args->stateid,
3587 rpc_restart_call_prepare(task);
3591 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3594 dprintk("--> %s\n", __func__);
3596 if (!nfs4_sequence_done(task, &data->res.seq_res))
3598 if (nfs4_read_stateid_changed(task, &data->args))
3600 return data->read_done_cb ? data->read_done_cb(task, data) :
3601 nfs4_read_done_cb(task, data);
3604 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3606 data->timestamp = jiffies;
3607 data->read_done_cb = nfs4_read_done_cb;
3608 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3609 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
3612 static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3614 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3615 &data->args.seq_args,
3619 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3620 data->args.lock_context, FMODE_READ);
3623 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3625 struct inode *inode = data->header->inode;
3627 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3628 rpc_restart_call_prepare(task);
3631 if (task->tk_status >= 0) {
3632 renew_lease(NFS_SERVER(inode), data->timestamp);
3633 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
3638 static bool nfs4_write_stateid_changed(struct rpc_task *task,
3639 struct nfs_writeargs *args)
3642 if (!nfs4_error_stateid_expired(task->tk_status) ||
3643 nfs4_stateid_is_current(&args->stateid,
3648 rpc_restart_call_prepare(task);
3652 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3654 if (!nfs4_sequence_done(task, &data->res.seq_res))
3656 if (nfs4_write_stateid_changed(task, &data->args))
3658 return data->write_done_cb ? data->write_done_cb(task, data) :
3659 nfs4_write_done_cb(task, data);
3663 bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
3665 const struct nfs_pgio_header *hdr = data->header;
3667 /* Don't request attributes for pNFS or O_DIRECT writes */
3668 if (data->ds_clp != NULL || hdr->dreq != NULL)
3670 /* Otherwise, request attributes if and only if we don't hold
3673 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
3676 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3678 struct nfs_server *server = NFS_SERVER(data->header->inode);
3680 if (!nfs4_write_need_cache_consistency_data(data)) {
3681 data->args.bitmask = NULL;
3682 data->res.fattr = NULL;
3684 data->args.bitmask = server->cache_consistency_bitmask;
3686 if (!data->write_done_cb)
3687 data->write_done_cb = nfs4_write_done_cb;
3688 data->res.server = server;
3689 data->timestamp = jiffies;
3691 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3692 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3695 static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3697 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3698 &data->args.seq_args,
3702 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3703 data->args.lock_context, FMODE_WRITE);
3706 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
3708 nfs4_setup_sequence(NFS_SERVER(data->inode),
3709 &data->args.seq_args,
3714 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
3716 struct inode *inode = data->inode;
3718 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3719 rpc_restart_call_prepare(task);
3725 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
3727 if (!nfs4_sequence_done(task, &data->res.seq_res))
3729 return data->commit_done_cb(task, data);
3732 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
3734 struct nfs_server *server = NFS_SERVER(data->inode);
3736 if (data->commit_done_cb == NULL)
3737 data->commit_done_cb = nfs4_commit_done_cb;
3738 data->res.server = server;
3739 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3740 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3743 struct nfs4_renewdata {
3744 struct nfs_client *client;
3745 unsigned long timestamp;
3749 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3750 * standalone procedure for queueing an asynchronous RENEW.
3752 static void nfs4_renew_release(void *calldata)
3754 struct nfs4_renewdata *data = calldata;
3755 struct nfs_client *clp = data->client;
3757 if (atomic_read(&clp->cl_count) > 1)
3758 nfs4_schedule_state_renewal(clp);
3759 nfs_put_client(clp);
3763 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3765 struct nfs4_renewdata *data = calldata;
3766 struct nfs_client *clp = data->client;
3767 unsigned long timestamp = data->timestamp;
3769 if (task->tk_status < 0) {
3770 /* Unless we're shutting down, schedule state recovery! */
3771 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3773 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3774 nfs4_schedule_lease_recovery(clp);
3777 nfs4_schedule_path_down_recovery(clp);
3779 do_renew_lease(clp, timestamp);
3782 static const struct rpc_call_ops nfs4_renew_ops = {
3783 .rpc_call_done = nfs4_renew_done,
3784 .rpc_release = nfs4_renew_release,
3787 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3789 struct rpc_message msg = {
3790 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3794 struct nfs4_renewdata *data;
3796 if (renew_flags == 0)
3798 if (!atomic_inc_not_zero(&clp->cl_count))
3800 data = kmalloc(sizeof(*data), GFP_NOFS);
3804 data->timestamp = jiffies;
3805 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3806 &nfs4_renew_ops, data);
3809 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3811 struct rpc_message msg = {
3812 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3816 unsigned long now = jiffies;
3819 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3822 do_renew_lease(clp, now);
3826 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3828 return (server->caps & NFS_CAP_ACLS)
3829 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3830 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3833 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3834 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
3837 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
3839 static int buf_to_pages_noslab(const void *buf, size_t buflen,
3840 struct page **pages, unsigned int *pgbase)
3842 struct page *newpage, **spages;
3848 len = min_t(size_t, PAGE_SIZE, buflen);
3849 newpage = alloc_page(GFP_KERNEL);
3851 if (newpage == NULL)
3853 memcpy(page_address(newpage), buf, len);
3858 } while (buflen != 0);
3864 __free_page(spages[rc-1]);
3868 struct nfs4_cached_acl {
3874 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3876 struct nfs_inode *nfsi = NFS_I(inode);
3878 spin_lock(&inode->i_lock);
3879 kfree(nfsi->nfs4_acl);
3880 nfsi->nfs4_acl = acl;
3881 spin_unlock(&inode->i_lock);
3884 static void nfs4_zap_acl_attr(struct inode *inode)
3886 nfs4_set_cached_acl(inode, NULL);
3889 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3891 struct nfs_inode *nfsi = NFS_I(inode);
3892 struct nfs4_cached_acl *acl;
3895 spin_lock(&inode->i_lock);
3896 acl = nfsi->nfs4_acl;
3899 if (buf == NULL) /* user is just asking for length */
3901 if (acl->cached == 0)
3903 ret = -ERANGE; /* see getxattr(2) man page */
3904 if (acl->len > buflen)
3906 memcpy(buf, acl->data, acl->len);
3910 spin_unlock(&inode->i_lock);
3914 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
3916 struct nfs4_cached_acl *acl;
3917 size_t buflen = sizeof(*acl) + acl_len;
3919 if (buflen <= PAGE_SIZE) {
3920 acl = kmalloc(buflen, GFP_KERNEL);
3924 _copy_from_pages(acl->data, pages, pgbase, acl_len);
3926 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3933 nfs4_set_cached_acl(inode, acl);
3937 * The getxattr API returns the required buffer length when called with a
3938 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3939 * the required buf. On a NULL buf, we send a page of data to the server
3940 * guessing that the ACL request can be serviced by a page. If so, we cache
3941 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3942 * the cache. If not so, we throw away the page, and cache the required
3943 * length. The next getxattr call will then produce another round trip to
3944 * the server, this time with the input buf of the required size.
3946 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3948 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
3949 struct nfs_getaclargs args = {
3950 .fh = NFS_FH(inode),
3954 struct nfs_getaclres res = {
3957 struct rpc_message msg = {
3958 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3962 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3963 int ret = -ENOMEM, i;
3965 /* As long as we're doing a round trip to the server anyway,
3966 * let's be prepared for a page of acl data. */
3969 if (npages > ARRAY_SIZE(pages))
3972 for (i = 0; i < npages; i++) {
3973 pages[i] = alloc_page(GFP_KERNEL);
3978 /* for decoding across pages */
3979 res.acl_scratch = alloc_page(GFP_KERNEL);
3980 if (!res.acl_scratch)
3983 args.acl_len = npages * PAGE_SIZE;
3984 args.acl_pgbase = 0;
3986 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
3987 __func__, buf, buflen, npages, args.acl_len);
3988 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3989 &msg, &args.seq_args, &res.seq_res, 0);
3993 /* Handle the case where the passed-in buffer is too short */
3994 if (res.acl_flags & NFS4_ACL_TRUNC) {
3995 /* Did the user only issue a request for the acl length? */
4001 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
4003 if (res.acl_len > buflen) {
4007 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
4012 for (i = 0; i < npages; i++)
4014 __free_page(pages[i]);
4015 if (res.acl_scratch)
4016 __free_page(res.acl_scratch);
4020 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4022 struct nfs4_exception exception = { };
4025 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4028 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4029 } while (exception.retry);
4033 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4035 struct nfs_server *server = NFS_SERVER(inode);
4038 if (!nfs4_server_supports_acls(server))
4040 ret = nfs_revalidate_inode(server, inode);
4043 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4044 nfs_zap_acl_cache(inode);
4045 ret = nfs4_read_cached_acl(inode, buf, buflen);
4047 /* -ENOENT is returned if there is no ACL or if there is an ACL
4048 * but no cached acl data, just the acl length */
4050 return nfs4_get_acl_uncached(inode, buf, buflen);
4053 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4055 struct nfs_server *server = NFS_SERVER(inode);
4056 struct page *pages[NFS4ACL_MAXPAGES];
4057 struct nfs_setaclargs arg = {
4058 .fh = NFS_FH(inode),
4062 struct nfs_setaclres res;
4063 struct rpc_message msg = {
4064 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4068 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4071 if (!nfs4_server_supports_acls(server))
4073 if (npages > ARRAY_SIZE(pages))
4075 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4078 nfs4_inode_return_delegation(inode);
4079 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4082 * Free each page after tx, so the only ref left is
4083 * held by the network stack
4086 put_page(pages[i-1]);
4089 * Acl update can result in inode attribute update.
4090 * so mark the attribute cache invalid.
4092 spin_lock(&inode->i_lock);
4093 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4094 spin_unlock(&inode->i_lock);
4095 nfs_access_zap_cache(inode);
4096 nfs_zap_acl_cache(inode);
4100 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4102 struct nfs4_exception exception = { };
4105 err = nfs4_handle_exception(NFS_SERVER(inode),
4106 __nfs4_proc_set_acl(inode, buf, buflen),
4108 } while (exception.retry);
4113 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
4115 struct nfs_client *clp = server->nfs_client;
4117 if (task->tk_status >= 0)
4119 switch(task->tk_status) {
4120 case -NFS4ERR_DELEG_REVOKED:
4121 case -NFS4ERR_ADMIN_REVOKED:
4122 case -NFS4ERR_BAD_STATEID:
4125 nfs_remove_bad_delegation(state->inode);
4126 case -NFS4ERR_OPENMODE:
4129 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4130 goto stateid_invalid;
4131 goto wait_on_recovery;
4132 case -NFS4ERR_EXPIRED:
4133 if (state != NULL) {
4134 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4135 goto stateid_invalid;
4137 case -NFS4ERR_STALE_STATEID:
4138 case -NFS4ERR_STALE_CLIENTID:
4139 nfs4_schedule_lease_recovery(clp);
4140 goto wait_on_recovery;
4141 #if defined(CONFIG_NFS_V4_1)
4142 case -NFS4ERR_BADSESSION:
4143 case -NFS4ERR_BADSLOT:
4144 case -NFS4ERR_BAD_HIGH_SLOT:
4145 case -NFS4ERR_DEADSESSION:
4146 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4147 case -NFS4ERR_SEQ_FALSE_RETRY:
4148 case -NFS4ERR_SEQ_MISORDERED:
4149 dprintk("%s ERROR %d, Reset session\n", __func__,
4151 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4152 task->tk_status = 0;
4154 #endif /* CONFIG_NFS_V4_1 */
4155 case -NFS4ERR_DELAY:
4156 nfs_inc_server_stats(server, NFSIOS_DELAY);
4157 case -NFS4ERR_GRACE:
4158 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4159 task->tk_status = 0;
4161 case -NFS4ERR_RETRY_UNCACHED_REP:
4162 case -NFS4ERR_OLD_STATEID:
4163 task->tk_status = 0;
4166 task->tk_status = nfs4_map_errors(task->tk_status);
4169 task->tk_status = -EIO;
4172 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
4173 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4174 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4175 task->tk_status = 0;
4179 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4180 nfs4_verifier *bootverf)
4184 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4185 /* An impossible timestamp guarantees this value
4186 * will never match a generated boot time. */
4188 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4190 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4191 verf[0] = (__be32)nn->boot_time.tv_sec;
4192 verf[1] = (__be32)nn->boot_time.tv_nsec;
4194 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4198 nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4199 char *buf, size_t len)
4201 unsigned int result;
4204 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4206 rpc_peeraddr2str(clp->cl_rpcclient,
4208 rpc_peeraddr2str(clp->cl_rpcclient,
4209 RPC_DISPLAY_PROTO));
4215 nfs4_init_uniform_client_string(const struct nfs_client *clp,
4216 char *buf, size_t len)
4218 char *nodename = clp->cl_rpcclient->cl_nodename;
4220 if (nfs4_client_id_uniquifier[0] != '\0')
4221 nodename = nfs4_client_id_uniquifier;
4222 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4223 clp->rpc_ops->version, clp->cl_minorversion,
4228 * nfs4_proc_setclientid - Negotiate client ID
4229 * @clp: state data structure
4230 * @program: RPC program for NFSv4 callback service
4231 * @port: IP port number for NFS4 callback service
4232 * @cred: RPC credential to use for this call
4233 * @res: where to place the result
4235 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4237 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4238 unsigned short port, struct rpc_cred *cred,
4239 struct nfs4_setclientid_res *res)
4241 nfs4_verifier sc_verifier;
4242 struct nfs4_setclientid setclientid = {
4243 .sc_verifier = &sc_verifier,
4245 .sc_cb_ident = clp->cl_cb_ident,
4247 struct rpc_message msg = {
4248 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4249 .rpc_argp = &setclientid,
4255 /* nfs_client_id4 */
4256 nfs4_init_boot_verifier(clp, &sc_verifier);
4257 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4258 setclientid.sc_name_len =
4259 nfs4_init_uniform_client_string(clp,
4260 setclientid.sc_name,
4261 sizeof(setclientid.sc_name));
4263 setclientid.sc_name_len =
4264 nfs4_init_nonuniform_client_string(clp,
4265 setclientid.sc_name,
4266 sizeof(setclientid.sc_name));
4269 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
4270 sizeof(setclientid.sc_netid),
4271 rpc_peeraddr2str(clp->cl_rpcclient,
4272 RPC_DISPLAY_NETID));
4274 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
4275 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
4276 clp->cl_ipaddr, port >> 8, port & 255);
4278 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4279 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4280 setclientid.sc_name_len, setclientid.sc_name);
4281 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4282 dprintk("NFS reply setclientid: %d\n", status);
4287 * nfs4_proc_setclientid_confirm - Confirm client ID
4288 * @clp: state data structure
4289 * @res: result of a previous SETCLIENTID
4290 * @cred: RPC credential to use for this call
4292 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4294 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
4295 struct nfs4_setclientid_res *arg,
4296 struct rpc_cred *cred)
4298 struct nfs_fsinfo fsinfo;
4299 struct rpc_message msg = {
4300 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
4302 .rpc_resp = &fsinfo,
4308 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4309 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4312 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4314 spin_lock(&clp->cl_lock);
4315 clp->cl_lease_time = fsinfo.lease_time * HZ;
4316 clp->cl_last_renewal = now;
4317 spin_unlock(&clp->cl_lock);
4319 dprintk("NFS reply setclientid_confirm: %d\n", status);
4323 struct nfs4_delegreturndata {
4324 struct nfs4_delegreturnargs args;
4325 struct nfs4_delegreturnres res;
4327 nfs4_stateid stateid;
4328 unsigned long timestamp;
4329 struct nfs_fattr fattr;
4333 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4335 struct nfs4_delegreturndata *data = calldata;
4337 if (!nfs4_sequence_done(task, &data->res.seq_res))
4340 switch (task->tk_status) {
4341 case -NFS4ERR_STALE_STATEID:
4342 case -NFS4ERR_EXPIRED:
4344 renew_lease(data->res.server, data->timestamp);
4347 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4349 rpc_restart_call_prepare(task);
4353 data->rpc_status = task->tk_status;
4356 static void nfs4_delegreturn_release(void *calldata)
4361 #if defined(CONFIG_NFS_V4_1)
4362 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4364 struct nfs4_delegreturndata *d_data;
4366 d_data = (struct nfs4_delegreturndata *)data;
4368 nfs4_setup_sequence(d_data->res.server,
4369 &d_data->args.seq_args,
4370 &d_data->res.seq_res,
4373 #endif /* CONFIG_NFS_V4_1 */
4375 static const struct rpc_call_ops nfs4_delegreturn_ops = {
4376 #if defined(CONFIG_NFS_V4_1)
4377 .rpc_call_prepare = nfs4_delegreturn_prepare,
4378 #endif /* CONFIG_NFS_V4_1 */
4379 .rpc_call_done = nfs4_delegreturn_done,
4380 .rpc_release = nfs4_delegreturn_release,
4383 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4385 struct nfs4_delegreturndata *data;
4386 struct nfs_server *server = NFS_SERVER(inode);
4387 struct rpc_task *task;
4388 struct rpc_message msg = {
4389 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4392 struct rpc_task_setup task_setup_data = {
4393 .rpc_client = server->client,
4394 .rpc_message = &msg,
4395 .callback_ops = &nfs4_delegreturn_ops,
4396 .flags = RPC_TASK_ASYNC,
4400 data = kzalloc(sizeof(*data), GFP_NOFS);
4403 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4404 data->args.fhandle = &data->fh;
4405 data->args.stateid = &data->stateid;
4406 data->args.bitmask = server->cache_consistency_bitmask;
4407 nfs_copy_fh(&data->fh, NFS_FH(inode));
4408 nfs4_stateid_copy(&data->stateid, stateid);
4409 data->res.fattr = &data->fattr;
4410 data->res.server = server;
4411 nfs_fattr_init(data->res.fattr);
4412 data->timestamp = jiffies;
4413 data->rpc_status = 0;
4415 task_setup_data.callback_data = data;
4416 msg.rpc_argp = &data->args;
4417 msg.rpc_resp = &data->res;
4418 task = rpc_run_task(&task_setup_data);
4420 return PTR_ERR(task);
4423 status = nfs4_wait_for_completion_rpc_task(task);
4426 status = data->rpc_status;
4428 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4430 nfs_refresh_inode(inode, &data->fattr);
4436 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4438 struct nfs_server *server = NFS_SERVER(inode);
4439 struct nfs4_exception exception = { };
4442 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
4444 case -NFS4ERR_STALE_STATEID:
4445 case -NFS4ERR_EXPIRED:
4449 err = nfs4_handle_exception(server, err, &exception);
4450 } while (exception.retry);
4454 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4455 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4458 * sleep, with exponential backoff, and retry the LOCK operation.
4460 static unsigned long
4461 nfs4_set_lock_task_retry(unsigned long timeout)
4463 freezable_schedule_timeout_killable(timeout);
4465 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4466 return NFS4_LOCK_MAXTIMEOUT;
4470 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4472 struct inode *inode = state->inode;
4473 struct nfs_server *server = NFS_SERVER(inode);
4474 struct nfs_client *clp = server->nfs_client;
4475 struct nfs_lockt_args arg = {
4476 .fh = NFS_FH(inode),
4479 struct nfs_lockt_res res = {
4482 struct rpc_message msg = {
4483 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4486 .rpc_cred = state->owner->so_cred,
4488 struct nfs4_lock_state *lsp;
4491 arg.lock_owner.clientid = clp->cl_clientid;
4492 status = nfs4_set_lock_state(state, request);
4495 lsp = request->fl_u.nfs4_fl.owner;
4496 arg.lock_owner.id = lsp->ls_seqid.owner_id;
4497 arg.lock_owner.s_dev = server->s_dev;
4498 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4501 request->fl_type = F_UNLCK;
4503 case -NFS4ERR_DENIED:
4506 request->fl_ops->fl_release_private(request);
4511 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4513 struct nfs4_exception exception = { };
4517 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4518 _nfs4_proc_getlk(state, cmd, request),
4520 } while (exception.retry);
4524 static int do_vfs_lock(struct file *file, struct file_lock *fl)
4527 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4529 res = posix_lock_file_wait(file, fl);
4532 res = flock_lock_file_wait(file, fl);
4540 struct nfs4_unlockdata {
4541 struct nfs_locku_args arg;
4542 struct nfs_locku_res res;
4543 struct nfs4_lock_state *lsp;
4544 struct nfs_open_context *ctx;
4545 struct file_lock fl;
4546 const struct nfs_server *server;
4547 unsigned long timestamp;
4550 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4551 struct nfs_open_context *ctx,
4552 struct nfs4_lock_state *lsp,
4553 struct nfs_seqid *seqid)
4555 struct nfs4_unlockdata *p;
4556 struct inode *inode = lsp->ls_state->inode;
4558 p = kzalloc(sizeof(*p), GFP_NOFS);
4561 p->arg.fh = NFS_FH(inode);
4563 p->arg.seqid = seqid;
4564 p->res.seqid = seqid;
4565 p->arg.stateid = &lsp->ls_stateid;
4567 atomic_inc(&lsp->ls_count);
4568 /* Ensure we don't close file until we're done freeing locks! */
4569 p->ctx = get_nfs_open_context(ctx);
4570 memcpy(&p->fl, fl, sizeof(p->fl));
4571 p->server = NFS_SERVER(inode);
4575 static void nfs4_locku_release_calldata(void *data)
4577 struct nfs4_unlockdata *calldata = data;
4578 nfs_free_seqid(calldata->arg.seqid);
4579 nfs4_put_lock_state(calldata->lsp);
4580 put_nfs_open_context(calldata->ctx);
4584 static void nfs4_locku_done(struct rpc_task *task, void *data)
4586 struct nfs4_unlockdata *calldata = data;
4588 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4590 switch (task->tk_status) {
4592 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4593 &calldata->res.stateid);
4594 renew_lease(calldata->server, calldata->timestamp);
4596 case -NFS4ERR_BAD_STATEID:
4597 case -NFS4ERR_OLD_STATEID:
4598 case -NFS4ERR_STALE_STATEID:
4599 case -NFS4ERR_EXPIRED:
4602 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4603 rpc_restart_call_prepare(task);
4605 nfs_release_seqid(calldata->arg.seqid);
4608 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4610 struct nfs4_unlockdata *calldata = data;
4612 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4614 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
4615 /* Note: exit _without_ running nfs4_locku_done */
4618 calldata->timestamp = jiffies;
4619 if (nfs4_setup_sequence(calldata->server,
4620 &calldata->arg.seq_args,
4621 &calldata->res.seq_res,
4623 nfs_release_seqid(calldata->arg.seqid);
4626 task->tk_action = NULL;
4628 nfs4_sequence_done(task, &calldata->res.seq_res);
4631 static const struct rpc_call_ops nfs4_locku_ops = {
4632 .rpc_call_prepare = nfs4_locku_prepare,
4633 .rpc_call_done = nfs4_locku_done,
4634 .rpc_release = nfs4_locku_release_calldata,
4637 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4638 struct nfs_open_context *ctx,
4639 struct nfs4_lock_state *lsp,
4640 struct nfs_seqid *seqid)
4642 struct nfs4_unlockdata *data;
4643 struct rpc_message msg = {
4644 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4645 .rpc_cred = ctx->cred,
4647 struct rpc_task_setup task_setup_data = {
4648 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4649 .rpc_message = &msg,
4650 .callback_ops = &nfs4_locku_ops,
4651 .workqueue = nfsiod_workqueue,
4652 .flags = RPC_TASK_ASYNC,
4655 /* Ensure this is an unlock - when canceling a lock, the
4656 * canceled lock is passed in, and it won't be an unlock.
4658 fl->fl_type = F_UNLCK;
4660 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4662 nfs_free_seqid(seqid);
4663 return ERR_PTR(-ENOMEM);
4666 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4667 msg.rpc_argp = &data->arg;
4668 msg.rpc_resp = &data->res;
4669 task_setup_data.callback_data = data;
4670 return rpc_run_task(&task_setup_data);
4673 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4675 struct inode *inode = state->inode;
4676 struct nfs4_state_owner *sp = state->owner;
4677 struct nfs_inode *nfsi = NFS_I(inode);
4678 struct nfs_seqid *seqid;
4679 struct nfs4_lock_state *lsp;
4680 struct rpc_task *task;
4682 unsigned char fl_flags = request->fl_flags;
4684 status = nfs4_set_lock_state(state, request);
4685 /* Unlock _before_ we do the RPC call */
4686 request->fl_flags |= FL_EXISTS;
4687 /* Exclude nfs_delegation_claim_locks() */
4688 mutex_lock(&sp->so_delegreturn_mutex);
4689 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
4690 down_read(&nfsi->rwsem);
4691 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4692 up_read(&nfsi->rwsem);
4693 mutex_unlock(&sp->so_delegreturn_mutex);
4696 up_read(&nfsi->rwsem);
4697 mutex_unlock(&sp->so_delegreturn_mutex);
4700 /* Is this a delegated lock? */
4701 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4703 lsp = request->fl_u.nfs4_fl.owner;
4704 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4708 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4709 status = PTR_ERR(task);
4712 status = nfs4_wait_for_completion_rpc_task(task);
4715 request->fl_flags = fl_flags;
4719 struct nfs4_lockdata {
4720 struct nfs_lock_args arg;
4721 struct nfs_lock_res res;
4722 struct nfs4_lock_state *lsp;
4723 struct nfs_open_context *ctx;
4724 struct file_lock fl;
4725 unsigned long timestamp;
4728 struct nfs_server *server;
4731 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4732 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4735 struct nfs4_lockdata *p;
4736 struct inode *inode = lsp->ls_state->inode;
4737 struct nfs_server *server = NFS_SERVER(inode);
4739 p = kzalloc(sizeof(*p), gfp_mask);
4743 p->arg.fh = NFS_FH(inode);
4745 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4746 if (p->arg.open_seqid == NULL)
4748 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4749 if (p->arg.lock_seqid == NULL)
4750 goto out_free_seqid;
4751 p->arg.lock_stateid = &lsp->ls_stateid;
4752 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4753 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
4754 p->arg.lock_owner.s_dev = server->s_dev;
4755 p->res.lock_seqid = p->arg.lock_seqid;
4758 atomic_inc(&lsp->ls_count);
4759 p->ctx = get_nfs_open_context(ctx);
4760 memcpy(&p->fl, fl, sizeof(p->fl));
4763 nfs_free_seqid(p->arg.open_seqid);
4769 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4771 struct nfs4_lockdata *data = calldata;
4772 struct nfs4_state *state = data->lsp->ls_state;
4774 dprintk("%s: begin!\n", __func__);
4775 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4777 /* Do we need to do an open_to_lock_owner? */
4778 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4779 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
4780 goto out_release_lock_seqid;
4782 data->arg.open_stateid = &state->stateid;
4783 data->arg.new_lock_owner = 1;
4784 data->res.open_seqid = data->arg.open_seqid;
4786 data->arg.new_lock_owner = 0;
4787 if (!nfs4_valid_open_stateid(state)) {
4788 data->rpc_status = -EBADF;
4789 task->tk_action = NULL;
4790 goto out_release_open_seqid;
4792 data->timestamp = jiffies;
4793 if (nfs4_setup_sequence(data->server,
4794 &data->arg.seq_args,
4798 out_release_open_seqid:
4799 nfs_release_seqid(data->arg.open_seqid);
4800 out_release_lock_seqid:
4801 nfs_release_seqid(data->arg.lock_seqid);
4803 nfs4_sequence_done(task, &data->res.seq_res);
4804 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4807 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4809 struct nfs4_lockdata *data = calldata;
4811 dprintk("%s: begin!\n", __func__);
4813 if (!nfs4_sequence_done(task, &data->res.seq_res))
4816 data->rpc_status = task->tk_status;
4817 if (data->arg.new_lock_owner != 0) {
4818 if (data->rpc_status == 0)
4819 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4823 if (data->rpc_status == 0) {
4824 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
4825 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
4826 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4829 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4832 static void nfs4_lock_release(void *calldata)
4834 struct nfs4_lockdata *data = calldata;
4836 dprintk("%s: begin!\n", __func__);
4837 nfs_free_seqid(data->arg.open_seqid);
4838 if (data->cancelled != 0) {
4839 struct rpc_task *task;
4840 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4841 data->arg.lock_seqid);
4843 rpc_put_task_async(task);
4844 dprintk("%s: cancelling lock!\n", __func__);
4846 nfs_free_seqid(data->arg.lock_seqid);
4847 nfs4_put_lock_state(data->lsp);
4848 put_nfs_open_context(data->ctx);
4850 dprintk("%s: done!\n", __func__);
4853 static const struct rpc_call_ops nfs4_lock_ops = {
4854 .rpc_call_prepare = nfs4_lock_prepare,
4855 .rpc_call_done = nfs4_lock_done,
4856 .rpc_release = nfs4_lock_release,
4859 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4862 case -NFS4ERR_ADMIN_REVOKED:
4863 case -NFS4ERR_BAD_STATEID:
4864 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4865 if (new_lock_owner != 0 ||
4866 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
4867 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4869 case -NFS4ERR_STALE_STATEID:
4870 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4871 case -NFS4ERR_EXPIRED:
4872 nfs4_schedule_lease_recovery(server->nfs_client);
4876 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4878 struct nfs4_lockdata *data;
4879 struct rpc_task *task;
4880 struct rpc_message msg = {
4881 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4882 .rpc_cred = state->owner->so_cred,
4884 struct rpc_task_setup task_setup_data = {
4885 .rpc_client = NFS_CLIENT(state->inode),
4886 .rpc_message = &msg,
4887 .callback_ops = &nfs4_lock_ops,
4888 .workqueue = nfsiod_workqueue,
4889 .flags = RPC_TASK_ASYNC,
4893 dprintk("%s: begin!\n", __func__);
4894 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4895 fl->fl_u.nfs4_fl.owner,
4896 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4900 data->arg.block = 1;
4901 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4902 msg.rpc_argp = &data->arg;
4903 msg.rpc_resp = &data->res;
4904 task_setup_data.callback_data = data;
4905 if (recovery_type > NFS_LOCK_NEW) {
4906 if (recovery_type == NFS_LOCK_RECLAIM)
4907 data->arg.reclaim = NFS_LOCK_RECLAIM;
4908 nfs4_set_sequence_privileged(&data->arg.seq_args);
4910 task = rpc_run_task(&task_setup_data);
4912 return PTR_ERR(task);
4913 ret = nfs4_wait_for_completion_rpc_task(task);
4915 ret = data->rpc_status;
4917 nfs4_handle_setlk_error(data->server, data->lsp,
4918 data->arg.new_lock_owner, ret);
4920 data->cancelled = 1;
4922 dprintk("%s: done, ret = %d!\n", __func__, ret);
4926 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4928 struct nfs_server *server = NFS_SERVER(state->inode);
4929 struct nfs4_exception exception = {
4930 .inode = state->inode,
4935 /* Cache the lock if possible... */
4936 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4938 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4939 if (err != -NFS4ERR_DELAY)
4941 nfs4_handle_exception(server, err, &exception);
4942 } while (exception.retry);
4946 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4948 struct nfs_server *server = NFS_SERVER(state->inode);
4949 struct nfs4_exception exception = {
4950 .inode = state->inode,
4954 err = nfs4_set_lock_state(state, request);
4958 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4960 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4964 case -NFS4ERR_GRACE:
4965 case -NFS4ERR_DELAY:
4966 nfs4_handle_exception(server, err, &exception);
4969 } while (exception.retry);
4974 #if defined(CONFIG_NFS_V4_1)
4976 * nfs41_check_expired_locks - possibly free a lock stateid
4978 * @state: NFSv4 state for an inode
4980 * Returns NFS_OK if recovery for this stateid is now finished.
4981 * Otherwise a negative NFS4ERR value is returned.
4983 static int nfs41_check_expired_locks(struct nfs4_state *state)
4985 int status, ret = -NFS4ERR_BAD_STATEID;
4986 struct nfs4_lock_state *lsp;
4987 struct nfs_server *server = NFS_SERVER(state->inode);
4989 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
4990 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
4991 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4992 if (status != NFS_OK) {
4993 /* Free the stateid unless the server
4994 * informs us the stateid is unrecognized. */
4995 if (status != -NFS4ERR_BAD_STATEID)
4996 nfs41_free_stateid(server,
4998 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5007 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5009 int status = NFS_OK;
5011 if (test_bit(LK_STATE_IN_USE, &state->flags))
5012 status = nfs41_check_expired_locks(state);
5013 if (status != NFS_OK)
5014 status = nfs4_lock_expired(state, request);
5019 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5021 struct nfs4_state_owner *sp = state->owner;
5022 struct nfs_inode *nfsi = NFS_I(state->inode);
5023 unsigned char fl_flags = request->fl_flags;
5025 int status = -ENOLCK;
5027 if ((fl_flags & FL_POSIX) &&
5028 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5030 /* Is this a delegated open? */
5031 status = nfs4_set_lock_state(state, request);
5034 request->fl_flags |= FL_ACCESS;
5035 status = do_vfs_lock(request->fl_file, request);
5038 down_read(&nfsi->rwsem);
5039 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
5040 /* Yes: cache locks! */
5041 /* ...but avoid races with delegation recall... */
5042 request->fl_flags = fl_flags & ~FL_SLEEP;
5043 status = do_vfs_lock(request->fl_file, request);
5046 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5047 up_read(&nfsi->rwsem);
5048 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
5051 down_read(&nfsi->rwsem);
5052 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5053 status = -NFS4ERR_DELAY;
5056 /* Note: we always want to sleep here! */
5057 request->fl_flags = fl_flags | FL_SLEEP;
5058 if (do_vfs_lock(request->fl_file, request) < 0)
5059 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5060 "manager!\n", __func__);
5062 up_read(&nfsi->rwsem);
5064 request->fl_flags = fl_flags;
5068 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5070 struct nfs4_exception exception = {
5072 .inode = state->inode,
5077 err = _nfs4_proc_setlk(state, cmd, request);
5078 if (err == -NFS4ERR_DENIED)
5080 err = nfs4_handle_exception(NFS_SERVER(state->inode),
5082 } while (exception.retry);
5087 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5089 struct nfs_open_context *ctx;
5090 struct nfs4_state *state;
5091 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5094 /* verify open state */
5095 ctx = nfs_file_open_context(filp);
5098 if (request->fl_start < 0 || request->fl_end < 0)
5101 if (IS_GETLK(cmd)) {
5103 return nfs4_proc_getlk(state, F_GETLK, request);
5107 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5110 if (request->fl_type == F_UNLCK) {
5112 return nfs4_proc_unlck(state, cmd, request);
5119 * Don't rely on the VFS having checked the file open mode,
5120 * since it won't do this for flock() locks.
5122 switch (request->fl_type) {
5124 if (!(filp->f_mode & FMODE_READ))
5128 if (!(filp->f_mode & FMODE_WRITE))
5133 status = nfs4_proc_setlk(state, cmd, request);
5134 if ((status != -EAGAIN) || IS_SETLK(cmd))
5136 timeout = nfs4_set_lock_task_retry(timeout);
5137 status = -ERESTARTSYS;
5140 } while(status < 0);
5144 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
5146 struct nfs_server *server = NFS_SERVER(state->inode);
5149 err = nfs4_set_lock_state(state, fl);
5152 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
5155 printk(KERN_ERR "NFS: %s: unhandled error "
5156 "%d.\n", __func__, err);
5160 case -NFS4ERR_STALE_CLIENTID:
5161 case -NFS4ERR_STALE_STATEID:
5162 set_bit(NFS_DELEGATED_STATE, &state->flags);
5163 case -NFS4ERR_EXPIRED:
5164 nfs4_schedule_lease_recovery(server->nfs_client);
5166 case -NFS4ERR_BADSESSION:
5167 case -NFS4ERR_BADSLOT:
5168 case -NFS4ERR_BAD_HIGH_SLOT:
5169 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
5170 case -NFS4ERR_DEADSESSION:
5171 set_bit(NFS_DELEGATED_STATE, &state->flags);
5172 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
5174 case -NFS4ERR_DELEG_REVOKED:
5175 case -NFS4ERR_ADMIN_REVOKED:
5176 case -NFS4ERR_BAD_STATEID:
5177 case -NFS4ERR_OPENMODE:
5178 nfs4_schedule_stateid_recovery(server, state);
5180 case -NFS4ERR_DELAY:
5181 case -NFS4ERR_GRACE:
5182 set_bit(NFS_DELEGATED_STATE, &state->flags);
5186 case -NFS4ERR_DENIED:
5187 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
5194 struct nfs_release_lockowner_data {
5195 struct nfs4_lock_state *lsp;
5196 struct nfs_server *server;
5197 struct nfs_release_lockowner_args args;
5200 static void nfs4_release_lockowner_release(void *calldata)
5202 struct nfs_release_lockowner_data *data = calldata;
5203 nfs4_free_lock_state(data->server, data->lsp);
5207 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
5208 .rpc_release = nfs4_release_lockowner_release,
5211 int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
5213 struct nfs_server *server = lsp->ls_state->owner->so_server;
5214 struct nfs_release_lockowner_data *data;
5215 struct rpc_message msg = {
5216 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5219 if (server->nfs_client->cl_mvops->minor_version != 0)
5221 data = kmalloc(sizeof(*data), GFP_NOFS);
5225 data->server = server;
5226 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5227 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5228 data->args.lock_owner.s_dev = server->s_dev;
5229 msg.rpc_argp = &data->args;
5230 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5234 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5236 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5237 const void *buf, size_t buflen,
5238 int flags, int type)
5240 if (strcmp(key, "") != 0)
5243 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
5246 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5247 void *buf, size_t buflen, int type)
5249 if (strcmp(key, "") != 0)
5252 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
5255 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5256 size_t list_len, const char *name,
5257 size_t name_len, int type)
5259 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
5261 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5264 if (list && len <= list_len)
5265 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
5270 * nfs_fhget will use either the mounted_on_fileid or the fileid
5272 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5274 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5275 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5276 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
5277 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
5280 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
5281 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
5282 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5286 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5287 const struct qstr *name,
5288 struct nfs4_fs_locations *fs_locations,
5291 struct nfs_server *server = NFS_SERVER(dir);
5293 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
5295 struct nfs4_fs_locations_arg args = {
5296 .dir_fh = NFS_FH(dir),
5301 struct nfs4_fs_locations_res res = {
5302 .fs_locations = fs_locations,
5304 struct rpc_message msg = {
5305 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5311 dprintk("%s: start\n", __func__);
5313 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5314 * is not supported */
5315 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5316 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5318 bitmask[0] |= FATTR4_WORD0_FILEID;
5320 nfs_fattr_init(&fs_locations->fattr);
5321 fs_locations->server = server;
5322 fs_locations->nlocations = 0;
5323 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
5324 dprintk("%s: returned status = %d\n", __func__, status);
5328 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5329 const struct qstr *name,
5330 struct nfs4_fs_locations *fs_locations,
5333 struct nfs4_exception exception = { };
5336 err = nfs4_handle_exception(NFS_SERVER(dir),
5337 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
5339 } while (exception.retry);
5343 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5346 struct nfs4_secinfo_arg args = {
5347 .dir_fh = NFS_FH(dir),
5350 struct nfs4_secinfo_res res = {
5353 struct rpc_message msg = {
5354 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5359 dprintk("NFS call secinfo %s\n", name->name);
5360 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5361 dprintk("NFS reply secinfo: %d\n", status);
5365 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5366 struct nfs4_secinfo_flavors *flavors)
5368 struct nfs4_exception exception = { };
5371 err = nfs4_handle_exception(NFS_SERVER(dir),
5372 _nfs4_proc_secinfo(dir, name, flavors),
5374 } while (exception.retry);
5378 #ifdef CONFIG_NFS_V4_1
5380 * Check the exchange flags returned by the server for invalid flags, having
5381 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5384 static int nfs4_check_cl_exchange_flags(u32 flags)
5386 if (flags & ~EXCHGID4_FLAG_MASK_R)
5388 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5389 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5391 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5395 return -NFS4ERR_INVAL;
5399 nfs41_same_server_scope(struct nfs41_server_scope *a,
5400 struct nfs41_server_scope *b)
5402 if (a->server_scope_sz == b->server_scope_sz &&
5403 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5410 * nfs4_proc_bind_conn_to_session()
5412 * The 4.1 client currently uses the same TCP connection for the
5413 * fore and backchannel.
5415 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
5418 struct nfs41_bind_conn_to_session_res res;
5419 struct rpc_message msg = {
5421 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5427 dprintk("--> %s\n", __func__);
5429 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5430 if (unlikely(res.session == NULL)) {
5435 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5437 if (memcmp(res.session->sess_id.data,
5438 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5439 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5443 if (res.dir != NFS4_CDFS4_BOTH) {
5444 dprintk("NFS: %s: Unexpected direction from server\n",
5449 if (res.use_conn_in_rdma_mode) {
5450 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5459 dprintk("<-- %s status= %d\n", __func__, status);
5464 * nfs4_proc_exchange_id()
5466 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5468 * Since the clientid has expired, all compounds using sessions
5469 * associated with the stale clientid will be returning
5470 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5471 * be in some phase of session reset.
5473 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
5475 nfs4_verifier verifier;
5476 struct nfs41_exchange_id_args args = {
5477 .verifier = &verifier,
5479 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
5481 struct nfs41_exchange_id_res res = {
5485 struct rpc_message msg = {
5486 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5492 nfs4_init_boot_verifier(clp, &verifier);
5493 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5495 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5496 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5497 args.id_len, args.id);
5499 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
5501 if (unlikely(res.server_owner == NULL)) {
5506 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
5508 if (unlikely(res.server_scope == NULL)) {
5510 goto out_server_owner;
5513 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
5514 if (unlikely(res.impl_id == NULL)) {
5516 goto out_server_scope;
5519 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5521 status = nfs4_check_cl_exchange_flags(res.flags);
5524 clp->cl_clientid = res.clientid;
5525 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5526 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5527 clp->cl_seqid = res.seqid;
5529 kfree(clp->cl_serverowner);
5530 clp->cl_serverowner = res.server_owner;
5531 res.server_owner = NULL;
5533 /* use the most recent implementation id */
5534 kfree(clp->cl_implid);
5535 clp->cl_implid = res.impl_id;
5537 if (clp->cl_serverscope != NULL &&
5538 !nfs41_same_server_scope(clp->cl_serverscope,
5539 res.server_scope)) {
5540 dprintk("%s: server_scope mismatch detected\n",
5542 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
5543 kfree(clp->cl_serverscope);
5544 clp->cl_serverscope = NULL;
5547 if (clp->cl_serverscope == NULL) {
5548 clp->cl_serverscope = res.server_scope;
5555 kfree(res.server_owner);
5557 kfree(res.server_scope);
5559 if (clp->cl_implid != NULL)
5560 dprintk("NFS reply exchange_id: Server Implementation ID: "
5561 "domain: %s, name: %s, date: %llu,%u\n",
5562 clp->cl_implid->domain, clp->cl_implid->name,
5563 clp->cl_implid->date.seconds,
5564 clp->cl_implid->date.nseconds);
5565 dprintk("NFS reply exchange_id: %d\n", status);
5569 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5570 struct rpc_cred *cred)
5572 struct rpc_message msg = {
5573 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5579 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5581 dprintk("NFS: Got error %d from the server %s on "
5582 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5586 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5587 struct rpc_cred *cred)
5592 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5593 ret = _nfs4_proc_destroy_clientid(clp, cred);
5595 case -NFS4ERR_DELAY:
5596 case -NFS4ERR_CLIENTID_BUSY:
5606 int nfs4_destroy_clientid(struct nfs_client *clp)
5608 struct rpc_cred *cred;
5611 if (clp->cl_mvops->minor_version < 1)
5613 if (clp->cl_exchange_flags == 0)
5615 if (clp->cl_preserve_clid)
5617 cred = nfs4_get_exchange_id_cred(clp);
5618 ret = nfs4_proc_destroy_clientid(clp, cred);
5623 case -NFS4ERR_STALE_CLIENTID:
5624 clp->cl_exchange_flags = 0;
5630 struct nfs4_get_lease_time_data {
5631 struct nfs4_get_lease_time_args *args;
5632 struct nfs4_get_lease_time_res *res;
5633 struct nfs_client *clp;
5636 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5639 struct nfs4_get_lease_time_data *data =
5640 (struct nfs4_get_lease_time_data *)calldata;
5642 dprintk("--> %s\n", __func__);
5643 /* just setup sequence, do not trigger session recovery
5644 since we're invoked within one */
5645 nfs41_setup_sequence(data->clp->cl_session,
5646 &data->args->la_seq_args,
5647 &data->res->lr_seq_res,
5649 dprintk("<-- %s\n", __func__);
5653 * Called from nfs4_state_manager thread for session setup, so don't recover
5654 * from sequence operation or clientid errors.
5656 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5658 struct nfs4_get_lease_time_data *data =
5659 (struct nfs4_get_lease_time_data *)calldata;
5661 dprintk("--> %s\n", __func__);
5662 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5664 switch (task->tk_status) {
5665 case -NFS4ERR_DELAY:
5666 case -NFS4ERR_GRACE:
5667 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5668 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5669 task->tk_status = 0;
5671 case -NFS4ERR_RETRY_UNCACHED_REP:
5672 rpc_restart_call_prepare(task);
5675 dprintk("<-- %s\n", __func__);
5678 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
5679 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5680 .rpc_call_done = nfs4_get_lease_time_done,
5683 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5685 struct rpc_task *task;
5686 struct nfs4_get_lease_time_args args;
5687 struct nfs4_get_lease_time_res res = {
5688 .lr_fsinfo = fsinfo,
5690 struct nfs4_get_lease_time_data data = {
5695 struct rpc_message msg = {
5696 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5700 struct rpc_task_setup task_setup = {
5701 .rpc_client = clp->cl_rpcclient,
5702 .rpc_message = &msg,
5703 .callback_ops = &nfs4_get_lease_time_ops,
5704 .callback_data = &data,
5705 .flags = RPC_TASK_TIMEOUT,
5709 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
5710 nfs4_set_sequence_privileged(&args.la_seq_args);
5711 dprintk("--> %s\n", __func__);
5712 task = rpc_run_task(&task_setup);
5715 status = PTR_ERR(task);
5717 status = task->tk_status;
5720 dprintk("<-- %s return %d\n", __func__, status);
5726 * Initialize the values to be used by the client in CREATE_SESSION
5727 * If nfs4_init_session set the fore channel request and response sizes,
5730 * Set the back channel max_resp_sz_cached to zero to force the client to
5731 * always set csa_cachethis to FALSE because the current implementation
5732 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5734 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5736 struct nfs4_session *session = args->client->cl_session;
5737 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5738 mxresp_sz = session->fc_target_max_resp_sz;
5741 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5743 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5744 /* Fore channel attributes */
5745 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5746 args->fc_attrs.max_resp_sz = mxresp_sz;
5747 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5748 args->fc_attrs.max_reqs = max_session_slots;
5750 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5751 "max_ops=%u max_reqs=%u\n",
5753 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5754 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5756 /* Back channel attributes */
5757 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5758 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5759 args->bc_attrs.max_resp_sz_cached = 0;
5760 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5761 args->bc_attrs.max_reqs = 1;
5763 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5764 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5766 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5767 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5768 args->bc_attrs.max_reqs);
5771 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5773 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5774 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5776 if (rcvd->max_resp_sz > sent->max_resp_sz)
5779 * Our requested max_ops is the minimum we need; we're not
5780 * prepared to break up compounds into smaller pieces than that.
5781 * So, no point even trying to continue if the server won't
5784 if (rcvd->max_ops < sent->max_ops)
5786 if (rcvd->max_reqs == 0)
5788 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5789 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
5793 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5795 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5796 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5798 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5800 if (rcvd->max_resp_sz < sent->max_resp_sz)
5802 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5804 /* These would render the backchannel useless: */
5805 if (rcvd->max_ops != sent->max_ops)
5807 if (rcvd->max_reqs != sent->max_reqs)
5812 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5813 struct nfs4_session *session)
5817 ret = nfs4_verify_fore_channel_attrs(args, session);
5820 return nfs4_verify_back_channel_attrs(args, session);
5823 static int _nfs4_proc_create_session(struct nfs_client *clp,
5824 struct rpc_cred *cred)
5826 struct nfs4_session *session = clp->cl_session;
5827 struct nfs41_create_session_args args = {
5829 .cb_program = NFS4_CALLBACK,
5831 struct nfs41_create_session_res res = {
5834 struct rpc_message msg = {
5835 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5842 nfs4_init_channel_attrs(&args);
5843 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5845 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5848 /* Verify the session's negotiated channel_attrs values */
5849 status = nfs4_verify_channel_attrs(&args, session);
5850 /* Increment the clientid slot sequence id */
5858 * Issues a CREATE_SESSION operation to the server.
5859 * It is the responsibility of the caller to verify the session is
5860 * expired before calling this routine.
5862 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
5866 struct nfs4_session *session = clp->cl_session;
5868 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5870 status = _nfs4_proc_create_session(clp, cred);
5874 /* Init or reset the session slot tables */
5875 status = nfs4_setup_session_slot_tables(session);
5876 dprintk("slot table setup returned %d\n", status);
5880 ptr = (unsigned *)&session->sess_id.data[0];
5881 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5882 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5884 dprintk("<-- %s\n", __func__);
5889 * Issue the over-the-wire RPC DESTROY_SESSION.
5890 * The caller must serialize access to this routine.
5892 int nfs4_proc_destroy_session(struct nfs4_session *session,
5893 struct rpc_cred *cred)
5895 struct rpc_message msg = {
5896 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5897 .rpc_argp = session,
5902 dprintk("--> nfs4_proc_destroy_session\n");
5904 /* session is still being setup */
5905 if (session->clp->cl_cons_state != NFS_CS_READY)
5908 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5911 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
5912 "Session has been destroyed regardless...\n", status);
5914 dprintk("<-- nfs4_proc_destroy_session\n");
5919 * Renew the cl_session lease.
5921 struct nfs4_sequence_data {
5922 struct nfs_client *clp;
5923 struct nfs4_sequence_args args;
5924 struct nfs4_sequence_res res;
5927 static void nfs41_sequence_release(void *data)
5929 struct nfs4_sequence_data *calldata = data;
5930 struct nfs_client *clp = calldata->clp;
5932 if (atomic_read(&clp->cl_count) > 1)
5933 nfs4_schedule_state_renewal(clp);
5934 nfs_put_client(clp);
5938 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5940 switch(task->tk_status) {
5941 case -NFS4ERR_DELAY:
5942 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5945 nfs4_schedule_lease_recovery(clp);
5950 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5952 struct nfs4_sequence_data *calldata = data;
5953 struct nfs_client *clp = calldata->clp;
5955 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5958 if (task->tk_status < 0) {
5959 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5960 if (atomic_read(&clp->cl_count) == 1)
5963 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5964 rpc_restart_call_prepare(task);
5968 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5970 dprintk("<-- %s\n", __func__);
5973 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5975 struct nfs4_sequence_data *calldata = data;
5976 struct nfs_client *clp = calldata->clp;
5977 struct nfs4_sequence_args *args;
5978 struct nfs4_sequence_res *res;
5980 args = task->tk_msg.rpc_argp;
5981 res = task->tk_msg.rpc_resp;
5983 nfs41_setup_sequence(clp->cl_session, args, res, task);
5986 static const struct rpc_call_ops nfs41_sequence_ops = {
5987 .rpc_call_done = nfs41_sequence_call_done,
5988 .rpc_call_prepare = nfs41_sequence_prepare,
5989 .rpc_release = nfs41_sequence_release,
5992 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
5993 struct rpc_cred *cred,
5996 struct nfs4_sequence_data *calldata;
5997 struct rpc_message msg = {
5998 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6001 struct rpc_task_setup task_setup_data = {
6002 .rpc_client = clp->cl_rpcclient,
6003 .rpc_message = &msg,
6004 .callback_ops = &nfs41_sequence_ops,
6005 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
6008 if (!atomic_inc_not_zero(&clp->cl_count))
6009 return ERR_PTR(-EIO);
6010 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
6011 if (calldata == NULL) {
6012 nfs_put_client(clp);
6013 return ERR_PTR(-ENOMEM);
6015 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
6017 nfs4_set_sequence_privileged(&calldata->args);
6018 msg.rpc_argp = &calldata->args;
6019 msg.rpc_resp = &calldata->res;
6020 calldata->clp = clp;
6021 task_setup_data.callback_data = calldata;
6023 return rpc_run_task(&task_setup_data);
6026 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
6028 struct rpc_task *task;
6031 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6033 task = _nfs41_proc_sequence(clp, cred, false);
6035 ret = PTR_ERR(task);
6037 rpc_put_task_async(task);
6038 dprintk("<-- %s status=%d\n", __func__, ret);
6042 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6044 struct rpc_task *task;
6047 task = _nfs41_proc_sequence(clp, cred, true);
6049 ret = PTR_ERR(task);
6052 ret = rpc_wait_for_completion_task(task);
6054 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6056 if (task->tk_status == 0)
6057 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
6058 ret = task->tk_status;
6062 dprintk("<-- %s status=%d\n", __func__, ret);
6066 struct nfs4_reclaim_complete_data {
6067 struct nfs_client *clp;
6068 struct nfs41_reclaim_complete_args arg;
6069 struct nfs41_reclaim_complete_res res;
6072 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6074 struct nfs4_reclaim_complete_data *calldata = data;
6076 nfs41_setup_sequence(calldata->clp->cl_session,
6077 &calldata->arg.seq_args,
6078 &calldata->res.seq_res,
6082 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6084 switch(task->tk_status) {
6086 case -NFS4ERR_COMPLETE_ALREADY:
6087 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6089 case -NFS4ERR_DELAY:
6090 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6092 case -NFS4ERR_RETRY_UNCACHED_REP:
6095 nfs4_schedule_lease_recovery(clp);
6100 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6102 struct nfs4_reclaim_complete_data *calldata = data;
6103 struct nfs_client *clp = calldata->clp;
6104 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6106 dprintk("--> %s\n", __func__);
6107 if (!nfs41_sequence_done(task, res))
6110 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6111 rpc_restart_call_prepare(task);
6114 dprintk("<-- %s\n", __func__);
6117 static void nfs4_free_reclaim_complete_data(void *data)
6119 struct nfs4_reclaim_complete_data *calldata = data;
6124 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6125 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6126 .rpc_call_done = nfs4_reclaim_complete_done,
6127 .rpc_release = nfs4_free_reclaim_complete_data,
6131 * Issue a global reclaim complete.
6133 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6135 struct nfs4_reclaim_complete_data *calldata;
6136 struct rpc_task *task;
6137 struct rpc_message msg = {
6138 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6140 struct rpc_task_setup task_setup_data = {
6141 .rpc_client = clp->cl_rpcclient,
6142 .rpc_message = &msg,
6143 .callback_ops = &nfs4_reclaim_complete_call_ops,
6144 .flags = RPC_TASK_ASYNC,
6146 int status = -ENOMEM;
6148 dprintk("--> %s\n", __func__);
6149 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
6150 if (calldata == NULL)
6152 calldata->clp = clp;
6153 calldata->arg.one_fs = 0;
6155 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
6156 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
6157 msg.rpc_argp = &calldata->arg;
6158 msg.rpc_resp = &calldata->res;
6159 task_setup_data.callback_data = calldata;
6160 task = rpc_run_task(&task_setup_data);
6162 status = PTR_ERR(task);
6165 status = nfs4_wait_for_completion_rpc_task(task);
6167 status = task->tk_status;
6171 dprintk("<-- %s status=%d\n", __func__, status);
6176 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6178 struct nfs4_layoutget *lgp = calldata;
6179 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6180 struct nfs4_session *session = nfs4_get_session(server);
6182 dprintk("--> %s\n", __func__);
6183 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6184 * right now covering the LAYOUTGET we are about to send.
6185 * However, that is not so catastrophic, and there seems
6186 * to be no way to prevent it completely.
6188 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
6189 &lgp->res.seq_res, task))
6191 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6192 NFS_I(lgp->args.inode)->layout,
6193 lgp->args.ctx->state)) {
6194 rpc_exit(task, NFS4_OK);
6198 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6200 struct nfs4_layoutget *lgp = calldata;
6201 struct inode *inode = lgp->args.inode;
6202 struct nfs_server *server = NFS_SERVER(inode);
6203 struct pnfs_layout_hdr *lo;
6204 struct nfs4_state *state = NULL;
6205 unsigned long timeo, giveup;
6207 dprintk("--> %s\n", __func__);
6209 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
6212 switch (task->tk_status) {
6215 case -NFS4ERR_LAYOUTTRYLATER:
6216 case -NFS4ERR_RECALLCONFLICT:
6217 timeo = rpc_get_timeout(task->tk_client);
6218 giveup = lgp->args.timestamp + timeo;
6219 if (time_after(giveup, jiffies))
6220 task->tk_status = -NFS4ERR_DELAY;
6222 case -NFS4ERR_EXPIRED:
6223 case -NFS4ERR_BAD_STATEID:
6224 spin_lock(&inode->i_lock);
6225 lo = NFS_I(inode)->layout;
6226 if (!lo || list_empty(&lo->plh_segs)) {
6227 spin_unlock(&inode->i_lock);
6228 /* If the open stateid was bad, then recover it. */
6229 state = lgp->args.ctx->state;
6233 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6234 spin_unlock(&inode->i_lock);
6235 /* Mark the bad layout state as invalid, then
6236 * retry using the open stateid. */
6237 pnfs_free_lseg_list(&head);
6240 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6241 rpc_restart_call_prepare(task);
6243 dprintk("<-- %s\n", __func__);
6246 static size_t max_response_pages(struct nfs_server *server)
6248 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6249 return nfs_page_array_len(0, max_resp_sz);
6252 static void nfs4_free_pages(struct page **pages, size_t size)
6259 for (i = 0; i < size; i++) {
6262 __free_page(pages[i]);
6267 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6269 struct page **pages;
6272 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6274 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6278 for (i = 0; i < size; i++) {
6279 pages[i] = alloc_page(gfp_flags);
6281 dprintk("%s: failed to allocate page\n", __func__);
6282 nfs4_free_pages(pages, size);
6290 static void nfs4_layoutget_release(void *calldata)
6292 struct nfs4_layoutget *lgp = calldata;
6293 struct inode *inode = lgp->args.inode;
6294 struct nfs_server *server = NFS_SERVER(inode);
6295 size_t max_pages = max_response_pages(server);
6297 dprintk("--> %s\n", __func__);
6298 nfs4_free_pages(lgp->args.layout.pages, max_pages);
6299 pnfs_put_layout_hdr(NFS_I(inode)->layout);
6300 put_nfs_open_context(lgp->args.ctx);
6302 dprintk("<-- %s\n", __func__);
6305 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6306 .rpc_call_prepare = nfs4_layoutget_prepare,
6307 .rpc_call_done = nfs4_layoutget_done,
6308 .rpc_release = nfs4_layoutget_release,
6311 struct pnfs_layout_segment *
6312 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
6314 struct inode *inode = lgp->args.inode;
6315 struct nfs_server *server = NFS_SERVER(inode);
6316 size_t max_pages = max_response_pages(server);
6317 struct rpc_task *task;
6318 struct rpc_message msg = {
6319 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6320 .rpc_argp = &lgp->args,
6321 .rpc_resp = &lgp->res,
6323 struct rpc_task_setup task_setup_data = {
6324 .rpc_client = server->client,
6325 .rpc_message = &msg,
6326 .callback_ops = &nfs4_layoutget_call_ops,
6327 .callback_data = lgp,
6328 .flags = RPC_TASK_ASYNC,
6330 struct pnfs_layout_segment *lseg = NULL;
6333 dprintk("--> %s\n", __func__);
6335 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6336 if (!lgp->args.layout.pages) {
6337 nfs4_layoutget_release(lgp);
6338 return ERR_PTR(-ENOMEM);
6340 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
6341 lgp->args.timestamp = jiffies;
6343 lgp->res.layoutp = &lgp->args.layout;
6344 lgp->res.seq_res.sr_slot = NULL;
6345 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
6347 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6348 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6350 task = rpc_run_task(&task_setup_data);
6352 return ERR_CAST(task);
6353 status = nfs4_wait_for_completion_rpc_task(task);
6355 status = task->tk_status;
6356 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6357 if (status == 0 && lgp->res.layoutp->len)
6358 lseg = pnfs_layout_process(lgp);
6360 dprintk("<-- %s status=%d\n", __func__, status);
6362 return ERR_PTR(status);
6367 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6369 struct nfs4_layoutreturn *lrp = calldata;
6371 dprintk("--> %s\n", __func__);
6372 nfs41_setup_sequence(lrp->clp->cl_session,
6373 &lrp->args.seq_args,
6378 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6380 struct nfs4_layoutreturn *lrp = calldata;
6381 struct nfs_server *server;
6383 dprintk("--> %s\n", __func__);
6385 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
6388 server = NFS_SERVER(lrp->args.inode);
6389 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6390 rpc_restart_call_prepare(task);
6393 dprintk("<-- %s\n", __func__);
6396 static void nfs4_layoutreturn_release(void *calldata)
6398 struct nfs4_layoutreturn *lrp = calldata;
6399 struct pnfs_layout_hdr *lo = lrp->args.layout;
6401 dprintk("--> %s\n", __func__);
6402 spin_lock(&lo->plh_inode->i_lock);
6403 if (lrp->res.lrs_present)
6404 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6405 lo->plh_block_lgets--;
6406 spin_unlock(&lo->plh_inode->i_lock);
6407 pnfs_put_layout_hdr(lrp->args.layout);
6409 dprintk("<-- %s\n", __func__);
6412 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6413 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6414 .rpc_call_done = nfs4_layoutreturn_done,
6415 .rpc_release = nfs4_layoutreturn_release,
6418 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6420 struct rpc_task *task;
6421 struct rpc_message msg = {
6422 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6423 .rpc_argp = &lrp->args,
6424 .rpc_resp = &lrp->res,
6426 struct rpc_task_setup task_setup_data = {
6427 .rpc_client = lrp->clp->cl_rpcclient,
6428 .rpc_message = &msg,
6429 .callback_ops = &nfs4_layoutreturn_call_ops,
6430 .callback_data = lrp,
6434 dprintk("--> %s\n", __func__);
6435 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
6436 task = rpc_run_task(&task_setup_data);
6438 return PTR_ERR(task);
6439 status = task->tk_status;
6440 dprintk("<-- %s status=%d\n", __func__, status);
6446 * Retrieve the list of Data Server devices from the MDS.
6448 static int _nfs4_getdevicelist(struct nfs_server *server,
6449 const struct nfs_fh *fh,
6450 struct pnfs_devicelist *devlist)
6452 struct nfs4_getdevicelist_args args = {
6454 .layoutclass = server->pnfs_curr_ld->id,
6456 struct nfs4_getdevicelist_res res = {
6459 struct rpc_message msg = {
6460 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6466 dprintk("--> %s\n", __func__);
6467 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6469 dprintk("<-- %s status=%d\n", __func__, status);
6473 int nfs4_proc_getdevicelist(struct nfs_server *server,
6474 const struct nfs_fh *fh,
6475 struct pnfs_devicelist *devlist)
6477 struct nfs4_exception exception = { };
6481 err = nfs4_handle_exception(server,
6482 _nfs4_getdevicelist(server, fh, devlist),
6484 } while (exception.retry);
6486 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6487 err, devlist->num_devs);
6491 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6494 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6496 struct nfs4_getdeviceinfo_args args = {
6499 struct nfs4_getdeviceinfo_res res = {
6502 struct rpc_message msg = {
6503 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6509 dprintk("--> %s\n", __func__);
6510 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6511 dprintk("<-- %s status=%d\n", __func__, status);
6516 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6518 struct nfs4_exception exception = { };
6522 err = nfs4_handle_exception(server,
6523 _nfs4_proc_getdeviceinfo(server, pdev),
6525 } while (exception.retry);
6528 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6530 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6532 struct nfs4_layoutcommit_data *data = calldata;
6533 struct nfs_server *server = NFS_SERVER(data->args.inode);
6534 struct nfs4_session *session = nfs4_get_session(server);
6536 nfs41_setup_sequence(session,
6537 &data->args.seq_args,
6543 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6545 struct nfs4_layoutcommit_data *data = calldata;
6546 struct nfs_server *server = NFS_SERVER(data->args.inode);
6548 if (!nfs41_sequence_done(task, &data->res.seq_res))
6551 switch (task->tk_status) { /* Just ignore these failures */
6552 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6553 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6554 case -NFS4ERR_BADLAYOUT: /* no layout */
6555 case -NFS4ERR_GRACE: /* loca_recalim always false */
6556 task->tk_status = 0;
6559 nfs_post_op_update_inode_force_wcc(data->args.inode,
6563 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6564 rpc_restart_call_prepare(task);
6570 static void nfs4_layoutcommit_release(void *calldata)
6572 struct nfs4_layoutcommit_data *data = calldata;
6574 pnfs_cleanup_layoutcommit(data);
6575 put_rpccred(data->cred);
6579 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6580 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6581 .rpc_call_done = nfs4_layoutcommit_done,
6582 .rpc_release = nfs4_layoutcommit_release,
6586 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
6588 struct rpc_message msg = {
6589 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6590 .rpc_argp = &data->args,
6591 .rpc_resp = &data->res,
6592 .rpc_cred = data->cred,
6594 struct rpc_task_setup task_setup_data = {
6595 .task = &data->task,
6596 .rpc_client = NFS_CLIENT(data->args.inode),
6597 .rpc_message = &msg,
6598 .callback_ops = &nfs4_layoutcommit_ops,
6599 .callback_data = data,
6600 .flags = RPC_TASK_ASYNC,
6602 struct rpc_task *task;
6605 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6606 "lbw: %llu inode %lu\n",
6607 data->task.tk_pid, sync,
6608 data->args.lastbytewritten,
6609 data->args.inode->i_ino);
6611 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
6612 task = rpc_run_task(&task_setup_data);
6614 return PTR_ERR(task);
6617 status = nfs4_wait_for_completion_rpc_task(task);
6620 status = task->tk_status;
6622 dprintk("%s: status %d\n", __func__, status);
6628 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6629 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6631 struct nfs41_secinfo_no_name_args args = {
6632 .style = SECINFO_STYLE_CURRENT_FH,
6634 struct nfs4_secinfo_res res = {
6637 struct rpc_message msg = {
6638 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6642 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6646 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6647 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6649 struct nfs4_exception exception = { };
6652 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6655 case -NFS4ERR_WRONGSEC:
6656 case -NFS4ERR_NOTSUPP:
6659 err = nfs4_handle_exception(server, err, &exception);
6661 } while (exception.retry);
6667 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6668 struct nfs_fsinfo *info)
6672 rpc_authflavor_t flavor;
6673 struct nfs4_secinfo_flavors *flavors;
6675 page = alloc_page(GFP_KERNEL);
6681 flavors = page_address(page);
6682 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6685 * Fall back on "guess and check" method if
6686 * the server doesn't support SECINFO_NO_NAME
6688 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6689 err = nfs4_find_root_sec(server, fhandle, info);
6695 flavor = nfs_find_best_sec(flavors);
6697 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6707 static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6710 struct nfs41_test_stateid_args args = {
6713 struct nfs41_test_stateid_res res;
6714 struct rpc_message msg = {
6715 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6720 dprintk("NFS call test_stateid %p\n", stateid);
6721 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6722 nfs4_set_sequence_privileged(&args.seq_args);
6723 status = nfs4_call_sync_sequence(server->client, server, &msg,
6724 &args.seq_args, &res.seq_res);
6725 if (status != NFS_OK) {
6726 dprintk("NFS reply test_stateid: failed, %d\n", status);
6729 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
6734 * nfs41_test_stateid - perform a TEST_STATEID operation
6736 * @server: server / transport on which to perform the operation
6737 * @stateid: state ID to test
6739 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6740 * Otherwise a negative NFS4ERR value is returned if the operation
6741 * failed or the state ID is not currently valid.
6743 static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6745 struct nfs4_exception exception = { };
6748 err = _nfs41_test_stateid(server, stateid);
6749 if (err != -NFS4ERR_DELAY)
6751 nfs4_handle_exception(server, err, &exception);
6752 } while (exception.retry);
6756 static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6758 struct nfs41_free_stateid_args args = {
6761 struct nfs41_free_stateid_res res;
6762 struct rpc_message msg = {
6763 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6769 dprintk("NFS call free_stateid %p\n", stateid);
6770 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6771 nfs4_set_sequence_privileged(&args.seq_args);
6772 status = nfs4_call_sync_sequence(server->client, server, &msg,
6773 &args.seq_args, &res.seq_res);
6774 dprintk("NFS reply free_stateid: %d\n", status);
6779 * nfs41_free_stateid - perform a FREE_STATEID operation
6781 * @server: server / transport on which to perform the operation
6782 * @stateid: state ID to release
6784 * Returns NFS_OK if the server freed "stateid". Otherwise a
6785 * negative NFS4ERR value is returned.
6787 static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6789 struct nfs4_exception exception = { };
6792 err = _nfs4_free_stateid(server, stateid);
6793 if (err != -NFS4ERR_DELAY)
6795 nfs4_handle_exception(server, err, &exception);
6796 } while (exception.retry);
6800 static bool nfs41_match_stateid(const nfs4_stateid *s1,
6801 const nfs4_stateid *s2)
6803 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
6806 if (s1->seqid == s2->seqid)
6808 if (s1->seqid == 0 || s2->seqid == 0)
6814 #endif /* CONFIG_NFS_V4_1 */
6816 static bool nfs4_match_stateid(const nfs4_stateid *s1,
6817 const nfs4_stateid *s2)
6819 return nfs4_stateid_match(s1, s2);
6823 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
6824 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6825 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6826 .recover_open = nfs4_open_reclaim,
6827 .recover_lock = nfs4_lock_reclaim,
6828 .establish_clid = nfs4_init_clientid,
6829 .get_clid_cred = nfs4_get_setclientid_cred,
6830 .detect_trunking = nfs40_discover_server_trunking,
6833 #if defined(CONFIG_NFS_V4_1)
6834 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6835 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6836 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6837 .recover_open = nfs4_open_reclaim,
6838 .recover_lock = nfs4_lock_reclaim,
6839 .establish_clid = nfs41_init_clientid,
6840 .get_clid_cred = nfs4_get_exchange_id_cred,
6841 .reclaim_complete = nfs41_proc_reclaim_complete,
6842 .detect_trunking = nfs41_discover_server_trunking,
6844 #endif /* CONFIG_NFS_V4_1 */
6846 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6847 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6848 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6849 .recover_open = nfs4_open_expired,
6850 .recover_lock = nfs4_lock_expired,
6851 .establish_clid = nfs4_init_clientid,
6852 .get_clid_cred = nfs4_get_setclientid_cred,
6855 #if defined(CONFIG_NFS_V4_1)
6856 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
6857 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6858 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6859 .recover_open = nfs41_open_expired,
6860 .recover_lock = nfs41_lock_expired,
6861 .establish_clid = nfs41_init_clientid,
6862 .get_clid_cred = nfs4_get_exchange_id_cred,
6864 #endif /* CONFIG_NFS_V4_1 */
6866 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
6867 .sched_state_renewal = nfs4_proc_async_renew,
6868 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
6869 .renew_lease = nfs4_proc_renew,
6872 #if defined(CONFIG_NFS_V4_1)
6873 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
6874 .sched_state_renewal = nfs41_proc_async_sequence,
6875 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
6876 .renew_lease = nfs4_proc_sequence,
6880 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6882 .init_caps = NFS_CAP_READDIRPLUS
6883 | NFS_CAP_ATOMIC_OPEN
6884 | NFS_CAP_CHANGE_ATTR
6885 | NFS_CAP_POSIX_LOCK,
6886 .call_sync = _nfs4_call_sync,
6887 .match_stateid = nfs4_match_stateid,
6888 .find_root_sec = nfs4_find_root_sec,
6889 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6890 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6891 .state_renewal_ops = &nfs40_state_renewal_ops,
6894 #if defined(CONFIG_NFS_V4_1)
6895 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6897 .init_caps = NFS_CAP_READDIRPLUS
6898 | NFS_CAP_ATOMIC_OPEN
6899 | NFS_CAP_CHANGE_ATTR
6900 | NFS_CAP_POSIX_LOCK
6901 | NFS_CAP_STATEID_NFSV41
6902 | NFS_CAP_ATOMIC_OPEN_V1,
6903 .call_sync = nfs4_call_sync_sequence,
6904 .match_stateid = nfs41_match_stateid,
6905 .find_root_sec = nfs41_find_root_sec,
6906 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6907 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6908 .state_renewal_ops = &nfs41_state_renewal_ops,
6912 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6913 [0] = &nfs_v4_0_minor_ops,
6914 #if defined(CONFIG_NFS_V4_1)
6915 [1] = &nfs_v4_1_minor_ops,
6919 const struct inode_operations nfs4_dir_inode_operations = {
6920 .create = nfs_create,
6921 .lookup = nfs_lookup,
6922 .atomic_open = nfs_atomic_open,
6924 .unlink = nfs_unlink,
6925 .symlink = nfs_symlink,
6929 .rename = nfs_rename,
6930 .permission = nfs_permission,
6931 .getattr = nfs_getattr,
6932 .setattr = nfs_setattr,
6933 .getxattr = generic_getxattr,
6934 .setxattr = generic_setxattr,
6935 .listxattr = generic_listxattr,
6936 .removexattr = generic_removexattr,
6939 static const struct inode_operations nfs4_file_inode_operations = {
6940 .permission = nfs_permission,
6941 .getattr = nfs_getattr,
6942 .setattr = nfs_setattr,
6943 .getxattr = generic_getxattr,
6944 .setxattr = generic_setxattr,
6945 .listxattr = generic_listxattr,
6946 .removexattr = generic_removexattr,
6949 const struct nfs_rpc_ops nfs_v4_clientops = {
6950 .version = 4, /* protocol version */
6951 .dentry_ops = &nfs4_dentry_operations,
6952 .dir_inode_ops = &nfs4_dir_inode_operations,
6953 .file_inode_ops = &nfs4_file_inode_operations,
6954 .file_ops = &nfs4_file_operations,
6955 .getroot = nfs4_proc_get_root,
6956 .submount = nfs4_submount,
6957 .try_mount = nfs4_try_mount,
6958 .getattr = nfs4_proc_getattr,
6959 .setattr = nfs4_proc_setattr,
6960 .lookup = nfs4_proc_lookup,
6961 .access = nfs4_proc_access,
6962 .readlink = nfs4_proc_readlink,
6963 .create = nfs4_proc_create,
6964 .remove = nfs4_proc_remove,
6965 .unlink_setup = nfs4_proc_unlink_setup,
6966 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
6967 .unlink_done = nfs4_proc_unlink_done,
6968 .rename = nfs4_proc_rename,
6969 .rename_setup = nfs4_proc_rename_setup,
6970 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
6971 .rename_done = nfs4_proc_rename_done,
6972 .link = nfs4_proc_link,
6973 .symlink = nfs4_proc_symlink,
6974 .mkdir = nfs4_proc_mkdir,
6975 .rmdir = nfs4_proc_remove,
6976 .readdir = nfs4_proc_readdir,
6977 .mknod = nfs4_proc_mknod,
6978 .statfs = nfs4_proc_statfs,
6979 .fsinfo = nfs4_proc_fsinfo,
6980 .pathconf = nfs4_proc_pathconf,
6981 .set_capabilities = nfs4_server_capabilities,
6982 .decode_dirent = nfs4_decode_dirent,
6983 .read_setup = nfs4_proc_read_setup,
6984 .read_pageio_init = pnfs_pageio_init_read,
6985 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
6986 .read_done = nfs4_read_done,
6987 .write_setup = nfs4_proc_write_setup,
6988 .write_pageio_init = pnfs_pageio_init_write,
6989 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
6990 .write_done = nfs4_write_done,
6991 .commit_setup = nfs4_proc_commit_setup,
6992 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
6993 .commit_done = nfs4_commit_done,
6994 .lock = nfs4_proc_lock,
6995 .clear_acl_cache = nfs4_zap_acl_attr,
6996 .close_context = nfs4_close_context,
6997 .open_context = nfs4_atomic_open,
6998 .have_delegation = nfs4_have_delegation,
6999 .return_delegation = nfs4_inode_return_delegation,
7000 .alloc_client = nfs4_alloc_client,
7001 .init_client = nfs4_init_client,
7002 .free_client = nfs4_free_client,
7003 .create_server = nfs4_create_server,
7004 .clone_server = nfs_clone_server,
7007 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7008 .prefix = XATTR_NAME_NFSV4_ACL,
7009 .list = nfs4_xattr_list_nfs4_acl,
7010 .get = nfs4_xattr_get_nfs4_acl,
7011 .set = nfs4_xattr_set_nfs4_acl,
7014 const struct xattr_handler *nfs4_xattr_handlers[] = {
7015 &nfs4_xattr_nfs4_acl_handler,