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:
307 if (inode != NULL && nfs4_have_delegation(inode, FMODE_READ)) {
308 nfs_remove_bad_delegation(inode);
309 exception->retry = 1;
314 ret = nfs4_schedule_stateid_recovery(server, state);
317 goto wait_on_recovery;
318 case -NFS4ERR_EXPIRED:
320 ret = nfs4_schedule_stateid_recovery(server, state);
324 case -NFS4ERR_STALE_STATEID:
325 case -NFS4ERR_STALE_CLIENTID:
326 nfs4_schedule_lease_recovery(clp);
327 goto wait_on_recovery;
328 #if defined(CONFIG_NFS_V4_1)
329 case -NFS4ERR_BADSESSION:
330 case -NFS4ERR_BADSLOT:
331 case -NFS4ERR_BAD_HIGH_SLOT:
332 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
333 case -NFS4ERR_DEADSESSION:
334 case -NFS4ERR_SEQ_FALSE_RETRY:
335 case -NFS4ERR_SEQ_MISORDERED:
336 dprintk("%s ERROR: %d Reset session\n", __func__,
338 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
339 goto wait_on_recovery;
340 #endif /* defined(CONFIG_NFS_V4_1) */
341 case -NFS4ERR_FILE_OPEN:
342 if (exception->timeout > HZ) {
343 /* We have retried a decent amount, time to
351 ret = nfs4_delay(server->client, &exception->timeout);
354 case -NFS4ERR_RETRY_UNCACHED_REP:
355 case -NFS4ERR_OLD_STATEID:
356 exception->retry = 1;
358 case -NFS4ERR_BADOWNER:
359 /* The following works around a Linux server bug! */
360 case -NFS4ERR_BADNAME:
361 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
362 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
363 exception->retry = 1;
364 printk(KERN_WARNING "NFS: v4 server %s "
365 "does not accept raw "
367 "Reenabling the idmapper.\n",
368 server->nfs_client->cl_hostname);
371 /* We failed to handle the error */
372 return nfs4_map_errors(ret);
374 ret = nfs4_wait_clnt_recover(clp);
376 exception->retry = 1;
381 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
383 spin_lock(&clp->cl_lock);
384 if (time_before(clp->cl_last_renewal,timestamp))
385 clp->cl_last_renewal = timestamp;
386 spin_unlock(&clp->cl_lock);
389 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
391 do_renew_lease(server->nfs_client, timestamp);
394 #if defined(CONFIG_NFS_V4_1)
396 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
398 struct nfs4_session *session;
399 struct nfs4_slot_table *tbl;
400 bool send_new_highest_used_slotid = false;
403 /* just wake up the next guy waiting since
404 * we may have not consumed a slot after all */
405 dprintk("%s: No slot\n", __func__);
408 tbl = res->sr_slot->table;
409 session = tbl->session;
411 spin_lock(&tbl->slot_tbl_lock);
412 /* Be nice to the server: try to ensure that the last transmitted
413 * value for highest_user_slotid <= target_highest_slotid
415 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
416 send_new_highest_used_slotid = true;
418 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
419 send_new_highest_used_slotid = false;
422 nfs4_free_slot(tbl, res->sr_slot);
424 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
425 send_new_highest_used_slotid = false;
427 spin_unlock(&tbl->slot_tbl_lock);
429 if (send_new_highest_used_slotid)
430 nfs41_server_notify_highest_slotid_update(session->clp);
433 static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
435 struct nfs4_session *session;
436 struct nfs4_slot *slot;
437 struct nfs_client *clp;
438 bool interrupted = false;
441 /* don't increment the sequence number if the task wasn't sent */
442 if (!RPC_WAS_SENT(task))
446 session = slot->table->session;
448 if (slot->interrupted) {
449 slot->interrupted = 0;
453 /* Check the SEQUENCE operation status */
454 switch (res->sr_status) {
456 /* Update the slot's sequence and clientid lease timer */
459 do_renew_lease(clp, res->sr_timestamp);
460 /* Check sequence flags */
461 if (res->sr_status_flags != 0)
462 nfs4_schedule_lease_recovery(clp);
463 nfs41_update_target_slotid(slot->table, slot, res);
467 * sr_status remains 1 if an RPC level error occurred.
468 * The server may or may not have processed the sequence
470 * Mark the slot as having hosted an interrupted RPC call.
472 slot->interrupted = 1;
475 /* The server detected a resend of the RPC call and
476 * returned NFS4ERR_DELAY as per Section 2.10.6.2
479 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
484 case -NFS4ERR_BADSLOT:
486 * The slot id we used was probably retired. Try again
487 * using a different slot id.
490 case -NFS4ERR_SEQ_MISORDERED:
492 * Was the last operation on this sequence interrupted?
493 * If so, retry after bumping the sequence number.
500 * Could this slot have been previously retired?
501 * If so, then the server may be expecting seq_nr = 1!
503 if (slot->seq_nr != 1) {
508 case -NFS4ERR_SEQ_FALSE_RETRY:
512 /* Just update the slot sequence no. */
516 /* The session may be reset by one of the error handlers. */
517 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
518 nfs41_sequence_free_slot(res);
521 if (rpc_restart_call_prepare(task)) {
527 if (!rpc_restart_call(task))
529 rpc_delay(task, NFS4_POLL_RETRY_MAX);
533 static int nfs4_sequence_done(struct rpc_task *task,
534 struct nfs4_sequence_res *res)
536 if (res->sr_slot == NULL)
538 return nfs41_sequence_done(task, res);
541 static void nfs41_init_sequence(struct nfs4_sequence_args *args,
542 struct nfs4_sequence_res *res, int cache_reply)
544 args->sa_slot = NULL;
545 args->sa_cache_this = 0;
546 args->sa_privileged = 0;
548 args->sa_cache_this = 1;
552 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
554 args->sa_privileged = 1;
557 int nfs41_setup_sequence(struct nfs4_session *session,
558 struct nfs4_sequence_args *args,
559 struct nfs4_sequence_res *res,
560 struct rpc_task *task)
562 struct nfs4_slot *slot;
563 struct nfs4_slot_table *tbl;
565 dprintk("--> %s\n", __func__);
566 /* slot already allocated? */
567 if (res->sr_slot != NULL)
570 tbl = &session->fc_slot_table;
572 task->tk_timeout = 0;
574 spin_lock(&tbl->slot_tbl_lock);
575 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
576 !args->sa_privileged) {
577 /* The state manager will wait until the slot table is empty */
578 dprintk("%s session is draining\n", __func__);
582 slot = nfs4_alloc_slot(tbl);
584 /* If out of memory, try again in 1/4 second */
585 if (slot == ERR_PTR(-ENOMEM))
586 task->tk_timeout = HZ >> 2;
587 dprintk("<-- %s: no free slots\n", __func__);
590 spin_unlock(&tbl->slot_tbl_lock);
592 args->sa_slot = slot;
594 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
595 slot->slot_nr, slot->seq_nr);
598 res->sr_timestamp = jiffies;
599 res->sr_status_flags = 0;
601 * sr_status is only set in decode_sequence, and so will remain
602 * set to 1 if an rpc level failure occurs.
606 rpc_call_start(task);
609 /* Privileged tasks are queued with top priority */
610 if (args->sa_privileged)
611 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
612 NULL, RPC_PRIORITY_PRIVILEGED);
614 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
615 spin_unlock(&tbl->slot_tbl_lock);
618 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
620 int nfs4_setup_sequence(const struct nfs_server *server,
621 struct nfs4_sequence_args *args,
622 struct nfs4_sequence_res *res,
623 struct rpc_task *task)
625 struct nfs4_session *session = nfs4_get_session(server);
628 if (session == NULL) {
629 rpc_call_start(task);
633 dprintk("--> %s clp %p session %p sr_slot %d\n",
634 __func__, session->clp, session, res->sr_slot ?
635 res->sr_slot->slot_nr : -1);
637 ret = nfs41_setup_sequence(session, args, res, task);
639 dprintk("<-- %s status=%d\n", __func__, ret);
643 struct nfs41_call_sync_data {
644 const struct nfs_server *seq_server;
645 struct nfs4_sequence_args *seq_args;
646 struct nfs4_sequence_res *seq_res;
649 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
651 struct nfs41_call_sync_data *data = calldata;
652 struct nfs4_session *session = nfs4_get_session(data->seq_server);
654 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
656 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
659 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
661 struct nfs41_call_sync_data *data = calldata;
663 nfs41_sequence_done(task, data->seq_res);
666 static const struct rpc_call_ops nfs41_call_sync_ops = {
667 .rpc_call_prepare = nfs41_call_sync_prepare,
668 .rpc_call_done = nfs41_call_sync_done,
671 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
672 struct nfs_server *server,
673 struct rpc_message *msg,
674 struct nfs4_sequence_args *args,
675 struct nfs4_sequence_res *res)
678 struct rpc_task *task;
679 struct nfs41_call_sync_data data = {
680 .seq_server = server,
684 struct rpc_task_setup task_setup = {
687 .callback_ops = &nfs41_call_sync_ops,
688 .callback_data = &data
691 task = rpc_run_task(&task_setup);
695 ret = task->tk_status;
703 void nfs41_init_sequence(struct nfs4_sequence_args *args,
704 struct nfs4_sequence_res *res, int cache_reply)
708 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
713 static int nfs4_sequence_done(struct rpc_task *task,
714 struct nfs4_sequence_res *res)
718 #endif /* CONFIG_NFS_V4_1 */
721 int _nfs4_call_sync(struct rpc_clnt *clnt,
722 struct nfs_server *server,
723 struct rpc_message *msg,
724 struct nfs4_sequence_args *args,
725 struct nfs4_sequence_res *res)
727 return rpc_call_sync(clnt, msg, 0);
731 int nfs4_call_sync(struct rpc_clnt *clnt,
732 struct nfs_server *server,
733 struct rpc_message *msg,
734 struct nfs4_sequence_args *args,
735 struct nfs4_sequence_res *res,
738 nfs41_init_sequence(args, res, cache_reply);
739 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
743 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
745 struct nfs_inode *nfsi = NFS_I(dir);
747 spin_lock(&dir->i_lock);
748 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
749 if (!cinfo->atomic || cinfo->before != dir->i_version)
750 nfs_force_lookup_revalidate(dir);
751 dir->i_version = cinfo->after;
752 nfs_fscache_invalidate(dir);
753 spin_unlock(&dir->i_lock);
756 struct nfs4_opendata {
758 struct nfs_openargs o_arg;
759 struct nfs_openres o_res;
760 struct nfs_open_confirmargs c_arg;
761 struct nfs_open_confirmres c_res;
762 struct nfs4_string owner_name;
763 struct nfs4_string group_name;
764 struct nfs_fattr f_attr;
766 struct dentry *dentry;
767 struct nfs4_state_owner *owner;
768 struct nfs4_state *state;
770 unsigned long timestamp;
771 unsigned int rpc_done : 1;
776 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
777 int err, struct nfs4_exception *exception)
781 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
783 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
784 exception->retry = 1;
788 static enum open_claim_type4
789 nfs4_map_atomic_open_claim(struct nfs_server *server,
790 enum open_claim_type4 claim)
792 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
797 case NFS4_OPEN_CLAIM_FH:
798 return NFS4_OPEN_CLAIM_NULL;
799 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
800 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
801 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
802 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
806 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
808 p->o_res.f_attr = &p->f_attr;
809 p->o_res.seqid = p->o_arg.seqid;
810 p->c_res.seqid = p->c_arg.seqid;
811 p->o_res.server = p->o_arg.server;
812 p->o_res.access_request = p->o_arg.access;
813 nfs_fattr_init(&p->f_attr);
814 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
817 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
818 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
819 const struct iattr *attrs,
820 enum open_claim_type4 claim,
823 struct dentry *parent = dget_parent(dentry);
824 struct inode *dir = parent->d_inode;
825 struct nfs_server *server = NFS_SERVER(dir);
826 struct nfs4_opendata *p;
828 p = kzalloc(sizeof(*p), gfp_mask);
831 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
832 if (p->o_arg.seqid == NULL)
834 nfs_sb_active(dentry->d_sb);
835 p->dentry = dget(dentry);
838 atomic_inc(&sp->so_count);
839 p->o_arg.open_flags = flags;
840 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
841 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
842 * will return permission denied for all bits until close */
843 if (!(flags & O_EXCL)) {
844 /* ask server to check for all possible rights as results
846 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
847 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
849 p->o_arg.clientid = server->nfs_client->cl_clientid;
850 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
851 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
852 p->o_arg.name = &dentry->d_name;
853 p->o_arg.server = server;
854 p->o_arg.bitmask = server->attr_bitmask;
855 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
856 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
857 switch (p->o_arg.claim) {
858 case NFS4_OPEN_CLAIM_NULL:
859 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
860 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
861 p->o_arg.fh = NFS_FH(dir);
863 case NFS4_OPEN_CLAIM_PREVIOUS:
864 case NFS4_OPEN_CLAIM_FH:
865 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
866 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
867 p->o_arg.fh = NFS_FH(dentry->d_inode);
869 if (attrs != NULL && attrs->ia_valid != 0) {
872 p->o_arg.u.attrs = &p->attrs;
873 memcpy(&p->attrs, attrs, sizeof(p->attrs));
876 verf[1] = current->pid;
877 memcpy(p->o_arg.u.verifier.data, verf,
878 sizeof(p->o_arg.u.verifier.data));
880 p->c_arg.fh = &p->o_res.fh;
881 p->c_arg.stateid = &p->o_res.stateid;
882 p->c_arg.seqid = p->o_arg.seqid;
883 nfs4_init_opendata_res(p);
893 static void nfs4_opendata_free(struct kref *kref)
895 struct nfs4_opendata *p = container_of(kref,
896 struct nfs4_opendata, kref);
897 struct super_block *sb = p->dentry->d_sb;
899 nfs_free_seqid(p->o_arg.seqid);
900 if (p->state != NULL)
901 nfs4_put_open_state(p->state);
902 nfs4_put_state_owner(p->owner);
906 nfs_fattr_free_names(&p->f_attr);
910 static void nfs4_opendata_put(struct nfs4_opendata *p)
913 kref_put(&p->kref, nfs4_opendata_free);
916 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
920 ret = rpc_wait_for_completion_task(task);
924 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
928 if (open_mode & (O_EXCL|O_TRUNC))
930 switch (mode & (FMODE_READ|FMODE_WRITE)) {
932 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
933 && state->n_rdonly != 0;
936 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
937 && state->n_wronly != 0;
939 case FMODE_READ|FMODE_WRITE:
940 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
941 && state->n_rdwr != 0;
947 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
949 if (delegation == NULL)
951 if ((delegation->type & fmode) != fmode)
953 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
955 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
957 nfs_mark_delegation_referenced(delegation);
961 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
970 case FMODE_READ|FMODE_WRITE:
973 nfs4_state_set_mode_locked(state, state->state | fmode);
976 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
978 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
979 nfs4_stateid_copy(&state->stateid, stateid);
980 nfs4_stateid_copy(&state->open_stateid, stateid);
981 set_bit(NFS_OPEN_STATE, &state->flags);
984 set_bit(NFS_O_RDONLY_STATE, &state->flags);
987 set_bit(NFS_O_WRONLY_STATE, &state->flags);
989 case FMODE_READ|FMODE_WRITE:
990 set_bit(NFS_O_RDWR_STATE, &state->flags);
994 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
996 write_seqlock(&state->seqlock);
997 nfs_set_open_stateid_locked(state, stateid, fmode);
998 write_sequnlock(&state->seqlock);
1001 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1004 * Protect the call to nfs4_state_set_mode_locked and
1005 * serialise the stateid update
1007 write_seqlock(&state->seqlock);
1008 if (deleg_stateid != NULL) {
1009 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1010 set_bit(NFS_DELEGATED_STATE, &state->flags);
1012 if (open_stateid != NULL)
1013 nfs_set_open_stateid_locked(state, open_stateid, fmode);
1014 write_sequnlock(&state->seqlock);
1015 spin_lock(&state->owner->so_lock);
1016 update_open_stateflags(state, fmode);
1017 spin_unlock(&state->owner->so_lock);
1020 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
1022 struct nfs_inode *nfsi = NFS_I(state->inode);
1023 struct nfs_delegation *deleg_cur;
1026 fmode &= (FMODE_READ|FMODE_WRITE);
1029 deleg_cur = rcu_dereference(nfsi->delegation);
1030 if (deleg_cur == NULL)
1033 spin_lock(&deleg_cur->lock);
1034 if (nfsi->delegation != deleg_cur ||
1035 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
1036 (deleg_cur->type & fmode) != fmode)
1037 goto no_delegation_unlock;
1039 if (delegation == NULL)
1040 delegation = &deleg_cur->stateid;
1041 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1042 goto no_delegation_unlock;
1044 nfs_mark_delegation_referenced(deleg_cur);
1045 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1047 no_delegation_unlock:
1048 spin_unlock(&deleg_cur->lock);
1052 if (!ret && open_stateid != NULL) {
1053 __update_open_stateid(state, open_stateid, NULL, fmode);
1061 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1063 struct nfs_delegation *delegation;
1066 delegation = rcu_dereference(NFS_I(inode)->delegation);
1067 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1072 nfs4_inode_return_delegation(inode);
1075 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1077 struct nfs4_state *state = opendata->state;
1078 struct nfs_inode *nfsi = NFS_I(state->inode);
1079 struct nfs_delegation *delegation;
1080 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
1081 fmode_t fmode = opendata->o_arg.fmode;
1082 nfs4_stateid stateid;
1086 if (can_open_cached(state, fmode, open_mode)) {
1087 spin_lock(&state->owner->so_lock);
1088 if (can_open_cached(state, fmode, open_mode)) {
1089 update_open_stateflags(state, fmode);
1090 spin_unlock(&state->owner->so_lock);
1091 goto out_return_state;
1093 spin_unlock(&state->owner->so_lock);
1096 delegation = rcu_dereference(nfsi->delegation);
1097 if (!can_open_delegated(delegation, fmode)) {
1101 /* Save the delegation */
1102 nfs4_stateid_copy(&stateid, &delegation->stateid);
1104 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1109 /* Try to update the stateid using the delegation */
1110 if (update_open_stateid(state, NULL, &stateid, fmode))
1111 goto out_return_state;
1114 return ERR_PTR(ret);
1116 atomic_inc(&state->count);
1121 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1123 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1124 struct nfs_delegation *delegation;
1125 int delegation_flags = 0;
1128 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1130 delegation_flags = delegation->flags;
1132 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1133 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1134 "returning a delegation for "
1135 "OPEN(CLAIM_DELEGATE_CUR)\n",
1137 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1138 nfs_inode_set_delegation(state->inode,
1139 data->owner->so_cred,
1142 nfs_inode_reclaim_delegation(state->inode,
1143 data->owner->so_cred,
1148 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1149 * and update the nfs4_state.
1151 static struct nfs4_state *
1152 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1154 struct inode *inode = data->state->inode;
1155 struct nfs4_state *state = data->state;
1158 if (!data->rpc_done) {
1159 ret = data->rpc_status;
1164 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1165 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1166 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1170 state = nfs4_get_open_state(inode, data->owner);
1174 ret = nfs_refresh_inode(inode, &data->f_attr);
1178 if (data->o_res.delegation_type != 0)
1179 nfs4_opendata_check_deleg(data, state);
1180 update_open_stateid(state, &data->o_res.stateid, NULL,
1185 return ERR_PTR(ret);
1189 static struct nfs4_state *
1190 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1192 struct inode *inode;
1193 struct nfs4_state *state = NULL;
1196 if (!data->rpc_done) {
1197 state = nfs4_try_open_cached(data);
1202 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1204 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1205 ret = PTR_ERR(inode);
1209 state = nfs4_get_open_state(inode, data->owner);
1212 if (data->o_res.delegation_type != 0)
1213 nfs4_opendata_check_deleg(data, state);
1214 update_open_stateid(state, &data->o_res.stateid, NULL,
1218 nfs_release_seqid(data->o_arg.seqid);
1223 return ERR_PTR(ret);
1226 static struct nfs4_state *
1227 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1229 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1230 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1231 return _nfs4_opendata_to_nfs4_state(data);
1234 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1236 struct nfs_inode *nfsi = NFS_I(state->inode);
1237 struct nfs_open_context *ctx;
1239 spin_lock(&state->inode->i_lock);
1240 list_for_each_entry(ctx, &nfsi->open_files, list) {
1241 if (ctx->state != state)
1243 get_nfs_open_context(ctx);
1244 spin_unlock(&state->inode->i_lock);
1247 spin_unlock(&state->inode->i_lock);
1248 return ERR_PTR(-ENOENT);
1251 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1252 struct nfs4_state *state, enum open_claim_type4 claim)
1254 struct nfs4_opendata *opendata;
1256 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1257 NULL, claim, GFP_NOFS);
1258 if (opendata == NULL)
1259 return ERR_PTR(-ENOMEM);
1260 opendata->state = state;
1261 atomic_inc(&state->count);
1265 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1267 struct nfs4_state *newstate;
1270 opendata->o_arg.open_flags = 0;
1271 opendata->o_arg.fmode = fmode;
1272 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1273 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1274 nfs4_init_opendata_res(opendata);
1275 ret = _nfs4_recover_proc_open(opendata);
1278 newstate = nfs4_opendata_to_nfs4_state(opendata);
1279 if (IS_ERR(newstate))
1280 return PTR_ERR(newstate);
1281 nfs4_close_state(newstate, fmode);
1286 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1288 struct nfs4_state *newstate;
1291 /* memory barrier prior to reading state->n_* */
1292 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1293 clear_bit(NFS_OPEN_STATE, &state->flags);
1295 if (state->n_rdwr != 0) {
1296 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1297 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1300 if (newstate != state)
1303 if (state->n_wronly != 0) {
1304 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1305 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1308 if (newstate != state)
1311 if (state->n_rdonly != 0) {
1312 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1313 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1316 if (newstate != state)
1320 * We may have performed cached opens for all three recoveries.
1321 * Check if we need to update the current stateid.
1323 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1324 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1325 write_seqlock(&state->seqlock);
1326 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1327 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1328 write_sequnlock(&state->seqlock);
1335 * reclaim state on the server after a reboot.
1337 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1339 struct nfs_delegation *delegation;
1340 struct nfs4_opendata *opendata;
1341 fmode_t delegation_type = 0;
1344 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1345 NFS4_OPEN_CLAIM_PREVIOUS);
1346 if (IS_ERR(opendata))
1347 return PTR_ERR(opendata);
1349 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1350 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1351 delegation_type = delegation->type;
1353 opendata->o_arg.u.delegation_type = delegation_type;
1354 status = nfs4_open_recover(opendata, state);
1355 nfs4_opendata_put(opendata);
1359 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1361 struct nfs_server *server = NFS_SERVER(state->inode);
1362 struct nfs4_exception exception = { };
1365 err = _nfs4_do_open_reclaim(ctx, state);
1366 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1368 if (err != -NFS4ERR_DELAY)
1370 nfs4_handle_exception(server, err, &exception);
1371 } while (exception.retry);
1375 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1377 struct nfs_open_context *ctx;
1380 ctx = nfs4_state_find_open_context(state);
1383 ret = nfs4_do_open_reclaim(ctx, state);
1384 put_nfs_open_context(ctx);
1388 static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1392 printk(KERN_ERR "NFS: %s: unhandled error "
1393 "%d.\n", __func__, err);
1398 case -NFS4ERR_BADSESSION:
1399 case -NFS4ERR_BADSLOT:
1400 case -NFS4ERR_BAD_HIGH_SLOT:
1401 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1402 case -NFS4ERR_DEADSESSION:
1403 set_bit(NFS_DELEGATED_STATE, &state->flags);
1404 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1406 case -NFS4ERR_STALE_CLIENTID:
1407 case -NFS4ERR_STALE_STATEID:
1408 set_bit(NFS_DELEGATED_STATE, &state->flags);
1409 case -NFS4ERR_EXPIRED:
1410 /* Don't recall a delegation if it was lost */
1411 nfs4_schedule_lease_recovery(server->nfs_client);
1413 case -NFS4ERR_DELEG_REVOKED:
1414 case -NFS4ERR_ADMIN_REVOKED:
1415 case -NFS4ERR_BAD_STATEID:
1416 case -NFS4ERR_OPENMODE:
1417 nfs_inode_find_state_and_recover(state->inode,
1419 nfs4_schedule_stateid_recovery(server, state);
1421 case -NFS4ERR_DELAY:
1422 case -NFS4ERR_GRACE:
1423 set_bit(NFS_DELEGATED_STATE, &state->flags);
1427 case -NFS4ERR_DENIED:
1428 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1434 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1436 struct nfs_server *server = NFS_SERVER(state->inode);
1437 struct nfs4_opendata *opendata;
1440 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1441 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1442 if (IS_ERR(opendata))
1443 return PTR_ERR(opendata);
1444 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1445 err = nfs4_open_recover(opendata, state);
1446 nfs4_opendata_put(opendata);
1447 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1450 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1452 struct nfs4_opendata *data = calldata;
1454 data->rpc_status = task->tk_status;
1455 if (data->rpc_status == 0) {
1456 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1457 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1458 renew_lease(data->o_res.server, data->timestamp);
1463 static void nfs4_open_confirm_release(void *calldata)
1465 struct nfs4_opendata *data = calldata;
1466 struct nfs4_state *state = NULL;
1468 /* If this request hasn't been cancelled, do nothing */
1469 if (data->cancelled == 0)
1471 /* In case of error, no cleanup! */
1472 if (!data->rpc_done)
1474 state = nfs4_opendata_to_nfs4_state(data);
1476 nfs4_close_state(state, data->o_arg.fmode);
1478 nfs4_opendata_put(data);
1481 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1482 .rpc_call_done = nfs4_open_confirm_done,
1483 .rpc_release = nfs4_open_confirm_release,
1487 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1489 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1491 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1492 struct rpc_task *task;
1493 struct rpc_message msg = {
1494 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1495 .rpc_argp = &data->c_arg,
1496 .rpc_resp = &data->c_res,
1497 .rpc_cred = data->owner->so_cred,
1499 struct rpc_task_setup task_setup_data = {
1500 .rpc_client = server->client,
1501 .rpc_message = &msg,
1502 .callback_ops = &nfs4_open_confirm_ops,
1503 .callback_data = data,
1504 .workqueue = nfsiod_workqueue,
1505 .flags = RPC_TASK_ASYNC,
1509 kref_get(&data->kref);
1511 data->rpc_status = 0;
1512 data->timestamp = jiffies;
1513 task = rpc_run_task(&task_setup_data);
1515 return PTR_ERR(task);
1516 status = nfs4_wait_for_completion_rpc_task(task);
1518 data->cancelled = 1;
1521 status = data->rpc_status;
1526 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1528 struct nfs4_opendata *data = calldata;
1529 struct nfs4_state_owner *sp = data->owner;
1530 struct nfs_client *clp = sp->so_server->nfs_client;
1532 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1535 * Check if we still need to send an OPEN call, or if we can use
1536 * a delegation instead.
1538 if (data->state != NULL) {
1539 struct nfs_delegation *delegation;
1541 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1544 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1545 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1546 can_open_delegated(delegation, data->o_arg.fmode))
1547 goto unlock_no_action;
1550 /* Update client id. */
1551 data->o_arg.clientid = clp->cl_clientid;
1552 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1553 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1554 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
1555 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1557 data->timestamp = jiffies;
1558 if (nfs4_setup_sequence(data->o_arg.server,
1559 &data->o_arg.seq_args,
1560 &data->o_res.seq_res,
1562 nfs_release_seqid(data->o_arg.seqid);
1564 /* Set the create mode (note dependency on the session type) */
1565 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1566 if (data->o_arg.open_flags & O_EXCL) {
1567 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1568 if (nfs4_has_persistent_session(clp))
1569 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1570 else if (clp->cl_mvops->minor_version > 0)
1571 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1577 task->tk_action = NULL;
1579 nfs4_sequence_done(task, &data->o_res.seq_res);
1582 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1584 struct nfs4_opendata *data = calldata;
1586 data->rpc_status = task->tk_status;
1588 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1591 if (task->tk_status == 0) {
1592 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1593 switch (data->o_res.f_attr->mode & S_IFMT) {
1597 data->rpc_status = -ELOOP;
1600 data->rpc_status = -EISDIR;
1603 data->rpc_status = -ENOTDIR;
1606 renew_lease(data->o_res.server, data->timestamp);
1607 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1608 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1613 static void nfs4_open_release(void *calldata)
1615 struct nfs4_opendata *data = calldata;
1616 struct nfs4_state *state = NULL;
1618 /* If this request hasn't been cancelled, do nothing */
1619 if (data->cancelled == 0)
1621 /* In case of error, no cleanup! */
1622 if (data->rpc_status != 0 || !data->rpc_done)
1624 /* In case we need an open_confirm, no cleanup! */
1625 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1627 state = nfs4_opendata_to_nfs4_state(data);
1629 nfs4_close_state(state, data->o_arg.fmode);
1631 nfs4_opendata_put(data);
1634 static const struct rpc_call_ops nfs4_open_ops = {
1635 .rpc_call_prepare = nfs4_open_prepare,
1636 .rpc_call_done = nfs4_open_done,
1637 .rpc_release = nfs4_open_release,
1640 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1642 struct inode *dir = data->dir->d_inode;
1643 struct nfs_server *server = NFS_SERVER(dir);
1644 struct nfs_openargs *o_arg = &data->o_arg;
1645 struct nfs_openres *o_res = &data->o_res;
1646 struct rpc_task *task;
1647 struct rpc_message msg = {
1648 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1651 .rpc_cred = data->owner->so_cred,
1653 struct rpc_task_setup task_setup_data = {
1654 .rpc_client = server->client,
1655 .rpc_message = &msg,
1656 .callback_ops = &nfs4_open_ops,
1657 .callback_data = data,
1658 .workqueue = nfsiod_workqueue,
1659 .flags = RPC_TASK_ASYNC,
1663 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1664 kref_get(&data->kref);
1666 data->rpc_status = 0;
1667 data->cancelled = 0;
1669 nfs4_set_sequence_privileged(&o_arg->seq_args);
1670 task = rpc_run_task(&task_setup_data);
1672 return PTR_ERR(task);
1673 status = nfs4_wait_for_completion_rpc_task(task);
1675 data->cancelled = 1;
1678 status = data->rpc_status;
1684 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1686 struct inode *dir = data->dir->d_inode;
1687 struct nfs_openres *o_res = &data->o_res;
1690 status = nfs4_run_open_task(data, 1);
1691 if (status != 0 || !data->rpc_done)
1694 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1696 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1697 status = _nfs4_proc_open_confirm(data);
1705 static int nfs4_opendata_access(struct rpc_cred *cred,
1706 struct nfs4_opendata *opendata,
1707 struct nfs4_state *state, fmode_t fmode,
1710 struct nfs_access_entry cache;
1713 /* access call failed or for some reason the server doesn't
1714 * support any access modes -- defer access call until later */
1715 if (opendata->o_res.access_supported == 0)
1719 /* don't check MAY_WRITE - a newly created file may not have
1720 * write mode bits, but POSIX allows the creating process to write.
1721 * use openflags to check for exec, because fmode won't
1722 * always have FMODE_EXEC set when file open for exec. */
1723 if (openflags & __FMODE_EXEC) {
1724 /* ONLY check for exec rights */
1726 } else if (fmode & FMODE_READ)
1730 cache.jiffies = jiffies;
1731 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1732 nfs_access_add_cache(state->inode, &cache);
1734 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
1737 /* even though OPEN succeeded, access is denied. Close the file */
1738 nfs4_close_state(state, fmode);
1743 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1745 static int _nfs4_proc_open(struct nfs4_opendata *data)
1747 struct inode *dir = data->dir->d_inode;
1748 struct nfs_server *server = NFS_SERVER(dir);
1749 struct nfs_openargs *o_arg = &data->o_arg;
1750 struct nfs_openres *o_res = &data->o_res;
1753 status = nfs4_run_open_task(data, 0);
1754 if (!data->rpc_done)
1757 if (status == -NFS4ERR_BADNAME &&
1758 !(o_arg->open_flags & O_CREAT))
1763 nfs_fattr_map_and_free_names(server, &data->f_attr);
1765 if (o_arg->open_flags & O_CREAT)
1766 update_changeattr(dir, &o_res->cinfo);
1767 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1768 server->caps &= ~NFS_CAP_POSIX_LOCK;
1769 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1770 status = _nfs4_proc_open_confirm(data);
1774 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1775 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1779 static int nfs4_recover_expired_lease(struct nfs_server *server)
1781 return nfs4_client_recover_expired_lease(server->nfs_client);
1786 * reclaim state on the server after a network partition.
1787 * Assumes caller holds the appropriate lock
1789 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1791 struct nfs4_opendata *opendata;
1794 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1795 NFS4_OPEN_CLAIM_FH);
1796 if (IS_ERR(opendata))
1797 return PTR_ERR(opendata);
1798 ret = nfs4_open_recover(opendata, state);
1800 d_drop(ctx->dentry);
1801 nfs4_opendata_put(opendata);
1805 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1807 struct nfs_server *server = NFS_SERVER(state->inode);
1808 struct nfs4_exception exception = { };
1812 err = _nfs4_open_expired(ctx, state);
1813 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1818 case -NFS4ERR_GRACE:
1819 case -NFS4ERR_DELAY:
1820 nfs4_handle_exception(server, err, &exception);
1823 } while (exception.retry);
1828 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1830 struct nfs_open_context *ctx;
1833 ctx = nfs4_state_find_open_context(state);
1836 ret = nfs4_do_open_expired(ctx, state);
1837 put_nfs_open_context(ctx);
1841 #if defined(CONFIG_NFS_V4_1)
1842 static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
1844 struct nfs_server *server = NFS_SERVER(state->inode);
1845 nfs4_stateid *stateid = &state->stateid;
1848 /* If a state reset has been done, test_stateid is unneeded */
1849 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1852 status = nfs41_test_stateid(server, stateid);
1853 if (status != NFS_OK) {
1854 /* Free the stateid unless the server explicitly
1855 * informs us the stateid is unrecognized. */
1856 if (status != -NFS4ERR_BAD_STATEID)
1857 nfs41_free_stateid(server, stateid);
1858 nfs_remove_bad_delegation(state->inode);
1860 write_seqlock(&state->seqlock);
1861 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1862 write_sequnlock(&state->seqlock);
1863 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1868 * nfs41_check_open_stateid - possibly free an open stateid
1870 * @state: NFSv4 state for an inode
1872 * Returns NFS_OK if recovery for this stateid is now finished.
1873 * Otherwise a negative NFS4ERR value is returned.
1875 static int nfs41_check_open_stateid(struct nfs4_state *state)
1877 struct nfs_server *server = NFS_SERVER(state->inode);
1878 nfs4_stateid *stateid = &state->open_stateid;
1881 /* If a state reset has been done, test_stateid is unneeded */
1882 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1883 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1884 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1885 return -NFS4ERR_BAD_STATEID;
1887 status = nfs41_test_stateid(server, stateid);
1888 if (status != NFS_OK) {
1889 /* Free the stateid unless the server explicitly
1890 * informs us the stateid is unrecognized. */
1891 if (status != -NFS4ERR_BAD_STATEID)
1892 nfs41_free_stateid(server, stateid);
1894 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1895 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1896 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1897 clear_bit(NFS_OPEN_STATE, &state->flags);
1902 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1906 nfs41_clear_delegation_stateid(state);
1907 status = nfs41_check_open_stateid(state);
1908 if (status != NFS_OK)
1909 status = nfs4_open_expired(sp, state);
1915 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1916 * fields corresponding to attributes that were used to store the verifier.
1917 * Make sure we clobber those fields in the later setattr call
1919 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1921 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1922 !(sattr->ia_valid & ATTR_ATIME_SET))
1923 sattr->ia_valid |= ATTR_ATIME;
1925 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1926 !(sattr->ia_valid & ATTR_MTIME_SET))
1927 sattr->ia_valid |= ATTR_MTIME;
1930 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
1933 struct nfs4_state **res)
1935 struct nfs4_state_owner *sp = opendata->owner;
1936 struct nfs_server *server = sp->so_server;
1937 struct nfs4_state *state;
1941 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
1943 ret = _nfs4_proc_open(opendata);
1947 state = nfs4_opendata_to_nfs4_state(opendata);
1948 ret = PTR_ERR(state);
1951 if (server->caps & NFS_CAP_POSIX_LOCK)
1952 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1954 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
1958 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
1959 nfs4_schedule_stateid_recovery(server, state);
1966 * Returns a referenced nfs4_state
1968 static int _nfs4_do_open(struct inode *dir,
1969 struct dentry *dentry,
1972 struct iattr *sattr,
1973 struct rpc_cred *cred,
1974 struct nfs4_state **res,
1975 struct nfs4_threshold **ctx_th)
1977 struct nfs4_state_owner *sp;
1978 struct nfs4_state *state = NULL;
1979 struct nfs_server *server = NFS_SERVER(dir);
1980 struct nfs4_opendata *opendata;
1981 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1984 /* Protect against reboot recovery conflicts */
1986 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1988 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1991 status = nfs4_recover_expired_lease(server);
1993 goto err_put_state_owner;
1994 if (dentry->d_inode != NULL)
1995 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
1997 if (dentry->d_inode)
1998 claim = NFS4_OPEN_CLAIM_FH;
1999 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
2001 if (opendata == NULL)
2002 goto err_put_state_owner;
2004 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2005 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2006 if (!opendata->f_attr.mdsthreshold)
2007 goto err_opendata_put;
2008 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
2010 if (dentry->d_inode != NULL)
2011 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
2013 status = _nfs4_open_and_get_state(opendata, fmode, flags, &state);
2015 goto err_opendata_put;
2017 if ((opendata->o_arg.open_flags & O_EXCL) &&
2018 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
2019 nfs4_exclusive_attrset(opendata, sattr);
2021 nfs_fattr_init(opendata->o_res.f_attr);
2022 status = nfs4_do_setattr(state->inode, cred,
2023 opendata->o_res.f_attr, sattr,
2026 nfs_setattr_update_inode(state->inode, sattr);
2027 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2030 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2031 *ctx_th = opendata->f_attr.mdsthreshold;
2033 kfree(opendata->f_attr.mdsthreshold);
2034 opendata->f_attr.mdsthreshold = NULL;
2036 nfs4_opendata_put(opendata);
2037 nfs4_put_state_owner(sp);
2041 kfree(opendata->f_attr.mdsthreshold);
2042 nfs4_opendata_put(opendata);
2043 err_put_state_owner:
2044 nfs4_put_state_owner(sp);
2051 static struct nfs4_state *nfs4_do_open(struct inode *dir,
2052 struct dentry *dentry,
2055 struct iattr *sattr,
2056 struct rpc_cred *cred,
2057 struct nfs4_threshold **ctx_th)
2059 struct nfs_server *server = NFS_SERVER(dir);
2060 struct nfs4_exception exception = { };
2061 struct nfs4_state *res;
2064 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
2066 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
2070 /* NOTE: BAD_SEQID means the server and client disagree about the
2071 * book-keeping w.r.t. state-changing operations
2072 * (OPEN/CLOSE/LOCK/LOCKU...)
2073 * It is actually a sign of a bug on the client or on the server.
2075 * If we receive a BAD_SEQID error in the particular case of
2076 * doing an OPEN, we assume that nfs_increment_open_seqid() will
2077 * have unhashed the old state_owner for us, and that we can
2078 * therefore safely retry using a new one. We should still warn
2079 * the user though...
2081 if (status == -NFS4ERR_BAD_SEQID) {
2082 pr_warn_ratelimited("NFS: v4 server %s "
2083 " returned a bad sequence-id error!\n",
2084 NFS_SERVER(dir)->nfs_client->cl_hostname);
2085 exception.retry = 1;
2089 * BAD_STATEID on OPEN means that the server cancelled our
2090 * state before it received the OPEN_CONFIRM.
2091 * Recover by retrying the request as per the discussion
2092 * on Page 181 of RFC3530.
2094 if (status == -NFS4ERR_BAD_STATEID) {
2095 exception.retry = 1;
2098 if (status == -EAGAIN) {
2099 /* We must have found a delegation */
2100 exception.retry = 1;
2103 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2105 res = ERR_PTR(nfs4_handle_exception(server,
2106 status, &exception));
2107 } while (exception.retry);
2111 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2112 struct nfs_fattr *fattr, struct iattr *sattr,
2113 struct nfs4_state *state)
2115 struct nfs_server *server = NFS_SERVER(inode);
2116 struct nfs_setattrargs arg = {
2117 .fh = NFS_FH(inode),
2120 .bitmask = server->attr_bitmask,
2122 struct nfs_setattrres res = {
2126 struct rpc_message msg = {
2127 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2132 unsigned long timestamp = jiffies;
2135 nfs_fattr_init(fattr);
2137 if (state != NULL && nfs4_valid_open_stateid(state)) {
2138 struct nfs_lockowner lockowner = {
2139 .l_owner = current->files,
2140 .l_pid = current->tgid,
2142 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2144 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2146 /* Use that stateid */
2148 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
2150 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2151 if (status == 0 && state != NULL)
2152 renew_lease(server, timestamp);
2156 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2157 struct nfs_fattr *fattr, struct iattr *sattr,
2158 struct nfs4_state *state)
2160 struct nfs_server *server = NFS_SERVER(inode);
2161 struct nfs4_exception exception = {
2167 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2169 case -NFS4ERR_OPENMODE:
2170 if (state && !(state->state & FMODE_WRITE)) {
2172 if (sattr->ia_valid & ATTR_OPEN)
2177 err = nfs4_handle_exception(server, err, &exception);
2178 } while (exception.retry);
2183 struct nfs4_closedata {
2184 struct inode *inode;
2185 struct nfs4_state *state;
2186 struct nfs_closeargs arg;
2187 struct nfs_closeres res;
2188 struct nfs_fattr fattr;
2189 unsigned long timestamp;
2194 static void nfs4_free_closedata(void *data)
2196 struct nfs4_closedata *calldata = data;
2197 struct nfs4_state_owner *sp = calldata->state->owner;
2198 struct super_block *sb = calldata->state->inode->i_sb;
2201 pnfs_roc_release(calldata->state->inode);
2202 nfs4_put_open_state(calldata->state);
2203 nfs_free_seqid(calldata->arg.seqid);
2204 nfs4_put_state_owner(sp);
2205 nfs_sb_deactive(sb);
2209 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2212 spin_lock(&state->owner->so_lock);
2213 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2214 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2216 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2219 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2222 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2223 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2224 clear_bit(NFS_OPEN_STATE, &state->flags);
2226 spin_unlock(&state->owner->so_lock);
2229 static void nfs4_close_done(struct rpc_task *task, void *data)
2231 struct nfs4_closedata *calldata = data;
2232 struct nfs4_state *state = calldata->state;
2233 struct nfs_server *server = NFS_SERVER(calldata->inode);
2235 dprintk("%s: begin!\n", __func__);
2236 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2238 /* hmm. we are done with the inode, and in the process of freeing
2239 * the state_owner. we keep this around to process errors
2241 switch (task->tk_status) {
2244 pnfs_roc_set_barrier(state->inode,
2245 calldata->roc_barrier);
2246 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
2247 renew_lease(server, calldata->timestamp);
2248 nfs4_close_clear_stateid_flags(state,
2249 calldata->arg.fmode);
2251 case -NFS4ERR_STALE_STATEID:
2252 case -NFS4ERR_OLD_STATEID:
2253 case -NFS4ERR_BAD_STATEID:
2254 case -NFS4ERR_EXPIRED:
2255 if (calldata->arg.fmode == 0)
2258 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2259 rpc_restart_call_prepare(task);
2261 nfs_release_seqid(calldata->arg.seqid);
2262 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2263 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2266 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2268 struct nfs4_closedata *calldata = data;
2269 struct nfs4_state *state = calldata->state;
2270 struct inode *inode = calldata->inode;
2273 dprintk("%s: begin!\n", __func__);
2274 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2277 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2278 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
2279 spin_lock(&state->owner->so_lock);
2280 /* Calculate the change in open mode */
2281 if (state->n_rdwr == 0) {
2282 if (state->n_rdonly == 0) {
2283 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2284 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2285 calldata->arg.fmode &= ~FMODE_READ;
2287 if (state->n_wronly == 0) {
2288 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2289 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2290 calldata->arg.fmode &= ~FMODE_WRITE;
2293 if (!nfs4_valid_open_stateid(state))
2295 spin_unlock(&state->owner->so_lock);
2298 /* Note: exit _without_ calling nfs4_close_done */
2302 if (calldata->arg.fmode == 0) {
2303 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2304 if (calldata->roc &&
2305 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2306 nfs_release_seqid(calldata->arg.seqid);
2311 nfs_fattr_init(calldata->res.fattr);
2312 calldata->timestamp = jiffies;
2313 if (nfs4_setup_sequence(NFS_SERVER(inode),
2314 &calldata->arg.seq_args,
2315 &calldata->res.seq_res,
2317 nfs_release_seqid(calldata->arg.seqid);
2318 dprintk("%s: done!\n", __func__);
2321 task->tk_action = NULL;
2323 nfs4_sequence_done(task, &calldata->res.seq_res);
2326 static const struct rpc_call_ops nfs4_close_ops = {
2327 .rpc_call_prepare = nfs4_close_prepare,
2328 .rpc_call_done = nfs4_close_done,
2329 .rpc_release = nfs4_free_closedata,
2333 * It is possible for data to be read/written from a mem-mapped file
2334 * after the sys_close call (which hits the vfs layer as a flush).
2335 * This means that we can't safely call nfsv4 close on a file until
2336 * the inode is cleared. This in turn means that we are not good
2337 * NFSv4 citizens - we do not indicate to the server to update the file's
2338 * share state even when we are done with one of the three share
2339 * stateid's in the inode.
2341 * NOTE: Caller must be holding the sp->so_owner semaphore!
2343 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
2345 struct nfs_server *server = NFS_SERVER(state->inode);
2346 struct nfs4_closedata *calldata;
2347 struct nfs4_state_owner *sp = state->owner;
2348 struct rpc_task *task;
2349 struct rpc_message msg = {
2350 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2351 .rpc_cred = state->owner->so_cred,
2353 struct rpc_task_setup task_setup_data = {
2354 .rpc_client = server->client,
2355 .rpc_message = &msg,
2356 .callback_ops = &nfs4_close_ops,
2357 .workqueue = nfsiod_workqueue,
2358 .flags = RPC_TASK_ASYNC,
2360 int status = -ENOMEM;
2362 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2363 if (calldata == NULL)
2365 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2366 calldata->inode = state->inode;
2367 calldata->state = state;
2368 calldata->arg.fh = NFS_FH(state->inode);
2369 calldata->arg.stateid = &state->open_stateid;
2370 /* Serialization for the sequence id */
2371 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2372 if (calldata->arg.seqid == NULL)
2373 goto out_free_calldata;
2374 calldata->arg.fmode = 0;
2375 calldata->arg.bitmask = server->cache_consistency_bitmask;
2376 calldata->res.fattr = &calldata->fattr;
2377 calldata->res.seqid = calldata->arg.seqid;
2378 calldata->res.server = server;
2379 calldata->roc = pnfs_roc(state->inode);
2380 nfs_sb_active(calldata->inode->i_sb);
2382 msg.rpc_argp = &calldata->arg;
2383 msg.rpc_resp = &calldata->res;
2384 task_setup_data.callback_data = calldata;
2385 task = rpc_run_task(&task_setup_data);
2387 return PTR_ERR(task);
2390 status = rpc_wait_for_completion_task(task);
2396 nfs4_put_open_state(state);
2397 nfs4_put_state_owner(sp);
2401 static struct inode *
2402 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2404 struct nfs4_state *state;
2406 /* Protect against concurrent sillydeletes */
2407 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2408 ctx->cred, &ctx->mdsthreshold);
2410 return ERR_CAST(state);
2412 return igrab(state->inode);
2415 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2417 if (ctx->state == NULL)
2420 nfs4_close_sync(ctx->state, ctx->mode);
2422 nfs4_close_state(ctx->state, ctx->mode);
2425 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2427 struct nfs4_server_caps_arg args = {
2430 struct nfs4_server_caps_res res = {};
2431 struct rpc_message msg = {
2432 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2438 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2440 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2441 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2442 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2443 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2444 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2445 NFS_CAP_CTIME|NFS_CAP_MTIME);
2446 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2447 server->caps |= NFS_CAP_ACLS;
2448 if (res.has_links != 0)
2449 server->caps |= NFS_CAP_HARDLINKS;
2450 if (res.has_symlinks != 0)
2451 server->caps |= NFS_CAP_SYMLINKS;
2452 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2453 server->caps |= NFS_CAP_FILEID;
2454 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2455 server->caps |= NFS_CAP_MODE;
2456 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2457 server->caps |= NFS_CAP_NLINK;
2458 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2459 server->caps |= NFS_CAP_OWNER;
2460 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2461 server->caps |= NFS_CAP_OWNER_GROUP;
2462 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2463 server->caps |= NFS_CAP_ATIME;
2464 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2465 server->caps |= NFS_CAP_CTIME;
2466 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2467 server->caps |= NFS_CAP_MTIME;
2469 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2470 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2471 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2472 server->acl_bitmask = res.acl_bitmask;
2473 server->fh_expire_type = res.fh_expire_type;
2479 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2481 struct nfs4_exception exception = { };
2484 err = nfs4_handle_exception(server,
2485 _nfs4_server_capabilities(server, fhandle),
2487 } while (exception.retry);
2491 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2492 struct nfs_fsinfo *info)
2494 struct nfs4_lookup_root_arg args = {
2495 .bitmask = nfs4_fattr_bitmap,
2497 struct nfs4_lookup_res res = {
2499 .fattr = info->fattr,
2502 struct rpc_message msg = {
2503 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2508 nfs_fattr_init(info->fattr);
2509 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2512 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2513 struct nfs_fsinfo *info)
2515 struct nfs4_exception exception = { };
2518 err = _nfs4_lookup_root(server, fhandle, info);
2521 case -NFS4ERR_WRONGSEC:
2524 err = nfs4_handle_exception(server, err, &exception);
2526 } while (exception.retry);
2531 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2532 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2534 struct rpc_auth *auth;
2537 auth = rpcauth_create(flavor, server->client);
2542 ret = nfs4_lookup_root(server, fhandle, info);
2547 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2548 struct nfs_fsinfo *info)
2550 int i, len, status = 0;
2551 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
2553 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
2557 for (i = 0; i < len; i++) {
2558 /* AUTH_UNIX is the default flavor if none was specified,
2559 * thus has already been tried. */
2560 if (flav_array[i] == RPC_AUTH_UNIX)
2563 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2564 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2569 * -EACCESS could mean that the user doesn't have correct permissions
2570 * to access the mount. It could also mean that we tried to mount
2571 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2572 * existing mount programs don't handle -EACCES very well so it should
2573 * be mapped to -EPERM instead.
2575 if (status == -EACCES)
2581 * get the file handle for the "/" directory on the server
2583 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2584 struct nfs_fsinfo *info)
2586 int minor_version = server->nfs_client->cl_minorversion;
2587 int status = nfs4_lookup_root(server, fhandle, info);
2588 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2590 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2591 * by nfs4_map_errors() as this function exits.
2593 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
2595 status = nfs4_server_capabilities(server, fhandle);
2597 status = nfs4_do_fsinfo(server, fhandle, info);
2598 return nfs4_map_errors(status);
2601 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2602 struct nfs_fsinfo *info)
2605 struct nfs_fattr *fattr = info->fattr;
2607 error = nfs4_server_capabilities(server, mntfh);
2609 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2613 error = nfs4_proc_getattr(server, mntfh, fattr);
2615 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2619 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2620 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2621 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2627 * Get locations and (maybe) other attributes of a referral.
2628 * Note that we'll actually follow the referral later when
2629 * we detect fsid mismatch in inode revalidation
2631 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2632 const struct qstr *name, struct nfs_fattr *fattr,
2633 struct nfs_fh *fhandle)
2635 int status = -ENOMEM;
2636 struct page *page = NULL;
2637 struct nfs4_fs_locations *locations = NULL;
2639 page = alloc_page(GFP_KERNEL);
2642 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2643 if (locations == NULL)
2646 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
2649 /* Make sure server returned a different fsid for the referral */
2650 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2651 dprintk("%s: server did not return a different fsid for"
2652 " a referral at %s\n", __func__, name->name);
2656 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2657 nfs_fixup_referral_attributes(&locations->fattr);
2659 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2660 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2661 memset(fhandle, 0, sizeof(struct nfs_fh));
2669 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2671 struct nfs4_getattr_arg args = {
2673 .bitmask = server->attr_bitmask,
2675 struct nfs4_getattr_res res = {
2679 struct rpc_message msg = {
2680 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2685 nfs_fattr_init(fattr);
2686 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2689 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2691 struct nfs4_exception exception = { };
2694 err = nfs4_handle_exception(server,
2695 _nfs4_proc_getattr(server, fhandle, fattr),
2697 } while (exception.retry);
2702 * The file is not closed if it is opened due to the a request to change
2703 * the size of the file. The open call will not be needed once the
2704 * VFS layer lookup-intents are implemented.
2706 * Close is called when the inode is destroyed.
2707 * If we haven't opened the file for O_WRONLY, we
2708 * need to in the size_change case to obtain a stateid.
2711 * Because OPEN is always done by name in nfsv4, it is
2712 * possible that we opened a different file by the same
2713 * name. We can recognize this race condition, but we
2714 * can't do anything about it besides returning an error.
2716 * This will be fixed with VFS changes (lookup-intent).
2719 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2720 struct iattr *sattr)
2722 struct inode *inode = dentry->d_inode;
2723 struct rpc_cred *cred = NULL;
2724 struct nfs4_state *state = NULL;
2727 if (pnfs_ld_layoutret_on_setattr(inode))
2728 pnfs_commit_and_return_layout(inode);
2730 nfs_fattr_init(fattr);
2732 /* Deal with open(O_TRUNC) */
2733 if (sattr->ia_valid & ATTR_OPEN)
2734 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2736 /* Optimization: if the end result is no change, don't RPC */
2737 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2740 /* Search for an existing open(O_WRITE) file */
2741 if (sattr->ia_valid & ATTR_FILE) {
2742 struct nfs_open_context *ctx;
2744 ctx = nfs_file_open_context(sattr->ia_file);
2751 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2753 nfs_setattr_update_inode(inode, sattr);
2757 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2758 const struct qstr *name, struct nfs_fh *fhandle,
2759 struct nfs_fattr *fattr)
2761 struct nfs_server *server = NFS_SERVER(dir);
2763 struct nfs4_lookup_arg args = {
2764 .bitmask = server->attr_bitmask,
2765 .dir_fh = NFS_FH(dir),
2768 struct nfs4_lookup_res res = {
2773 struct rpc_message msg = {
2774 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2779 nfs_fattr_init(fattr);
2781 dprintk("NFS call lookup %s\n", name->name);
2782 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2783 dprintk("NFS reply lookup: %d\n", status);
2787 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
2789 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2790 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
2791 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2795 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2796 struct qstr *name, struct nfs_fh *fhandle,
2797 struct nfs_fattr *fattr)
2799 struct nfs4_exception exception = { };
2800 struct rpc_clnt *client = *clnt;
2803 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2805 case -NFS4ERR_BADNAME:
2808 case -NFS4ERR_MOVED:
2809 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
2811 case -NFS4ERR_WRONGSEC:
2813 if (client != *clnt)
2816 client = nfs4_create_sec_client(client, dir, name);
2818 return PTR_ERR(client);
2820 exception.retry = 1;
2823 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
2825 } while (exception.retry);
2830 else if (client != *clnt)
2831 rpc_shutdown_client(client);
2836 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
2837 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2840 struct rpc_clnt *client = NFS_CLIENT(dir);
2842 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2843 if (client != NFS_CLIENT(dir)) {
2844 rpc_shutdown_client(client);
2845 nfs_fixup_secinfo_attributes(fattr);
2851 nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2852 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2855 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2857 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2859 rpc_shutdown_client(client);
2860 return ERR_PTR(status);
2865 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2867 struct nfs_server *server = NFS_SERVER(inode);
2868 struct nfs4_accessargs args = {
2869 .fh = NFS_FH(inode),
2870 .bitmask = server->cache_consistency_bitmask,
2872 struct nfs4_accessres res = {
2875 struct rpc_message msg = {
2876 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2879 .rpc_cred = entry->cred,
2881 int mode = entry->mask;
2885 * Determine which access bits we want to ask for...
2887 if (mode & MAY_READ)
2888 args.access |= NFS4_ACCESS_READ;
2889 if (S_ISDIR(inode->i_mode)) {
2890 if (mode & MAY_WRITE)
2891 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2892 if (mode & MAY_EXEC)
2893 args.access |= NFS4_ACCESS_LOOKUP;
2895 if (mode & MAY_WRITE)
2896 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2897 if (mode & MAY_EXEC)
2898 args.access |= NFS4_ACCESS_EXECUTE;
2901 res.fattr = nfs_alloc_fattr();
2902 if (res.fattr == NULL)
2905 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2907 nfs_access_set_mask(entry, res.access);
2908 nfs_refresh_inode(inode, res.fattr);
2910 nfs_free_fattr(res.fattr);
2914 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2916 struct nfs4_exception exception = { };
2919 err = nfs4_handle_exception(NFS_SERVER(inode),
2920 _nfs4_proc_access(inode, entry),
2922 } while (exception.retry);
2927 * TODO: For the time being, we don't try to get any attributes
2928 * along with any of the zero-copy operations READ, READDIR,
2931 * In the case of the first three, we want to put the GETATTR
2932 * after the read-type operation -- this is because it is hard
2933 * to predict the length of a GETATTR response in v4, and thus
2934 * align the READ data correctly. This means that the GETATTR
2935 * may end up partially falling into the page cache, and we should
2936 * shift it into the 'tail' of the xdr_buf before processing.
2937 * To do this efficiently, we need to know the total length
2938 * of data received, which doesn't seem to be available outside
2941 * In the case of WRITE, we also want to put the GETATTR after
2942 * the operation -- in this case because we want to make sure
2943 * we get the post-operation mtime and size.
2945 * Both of these changes to the XDR layer would in fact be quite
2946 * minor, but I decided to leave them for a subsequent patch.
2948 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2949 unsigned int pgbase, unsigned int pglen)
2951 struct nfs4_readlink args = {
2952 .fh = NFS_FH(inode),
2957 struct nfs4_readlink_res res;
2958 struct rpc_message msg = {
2959 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2964 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
2967 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2968 unsigned int pgbase, unsigned int pglen)
2970 struct nfs4_exception exception = { };
2973 err = nfs4_handle_exception(NFS_SERVER(inode),
2974 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2976 } while (exception.retry);
2981 * This is just for mknod. open(O_CREAT) will always do ->open_context().
2984 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2987 struct nfs_open_context *ctx;
2988 struct nfs4_state *state;
2991 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2993 return PTR_ERR(ctx);
2995 sattr->ia_mode &= ~current_umask();
2996 state = nfs4_do_open(dir, dentry, ctx->mode,
2997 flags, sattr, ctx->cred,
2998 &ctx->mdsthreshold);
3000 if (IS_ERR(state)) {
3001 status = PTR_ERR(state);
3004 d_add(dentry, igrab(state->inode));
3005 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
3008 put_nfs_open_context(ctx);
3012 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3014 struct nfs_server *server = NFS_SERVER(dir);
3015 struct nfs_removeargs args = {
3019 struct nfs_removeres res = {
3022 struct rpc_message msg = {
3023 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3029 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
3031 update_changeattr(dir, &res.cinfo);
3035 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3037 struct nfs4_exception exception = { };
3040 err = nfs4_handle_exception(NFS_SERVER(dir),
3041 _nfs4_proc_remove(dir, name),
3043 } while (exception.retry);
3047 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
3049 struct nfs_server *server = NFS_SERVER(dir);
3050 struct nfs_removeargs *args = msg->rpc_argp;
3051 struct nfs_removeres *res = msg->rpc_resp;
3053 res->server = server;
3054 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
3055 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
3058 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3060 nfs4_setup_sequence(NFS_SERVER(data->dir),
3061 &data->args.seq_args,
3066 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
3068 struct nfs_removeres *res = task->tk_msg.rpc_resp;
3070 if (!nfs4_sequence_done(task, &res->seq_res))
3072 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3074 update_changeattr(dir, &res->cinfo);
3078 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3080 struct nfs_server *server = NFS_SERVER(dir);
3081 struct nfs_renameargs *arg = msg->rpc_argp;
3082 struct nfs_renameres *res = msg->rpc_resp;
3084 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
3085 res->server = server;
3086 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
3089 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3091 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3092 &data->args.seq_args,
3097 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3098 struct inode *new_dir)
3100 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3102 if (!nfs4_sequence_done(task, &res->seq_res))
3104 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3107 update_changeattr(old_dir, &res->old_cinfo);
3108 update_changeattr(new_dir, &res->new_cinfo);
3112 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3113 struct inode *new_dir, struct qstr *new_name)
3115 struct nfs_server *server = NFS_SERVER(old_dir);
3116 struct nfs_renameargs arg = {
3117 .old_dir = NFS_FH(old_dir),
3118 .new_dir = NFS_FH(new_dir),
3119 .old_name = old_name,
3120 .new_name = new_name,
3122 struct nfs_renameres res = {
3125 struct rpc_message msg = {
3126 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3130 int status = -ENOMEM;
3132 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3134 update_changeattr(old_dir, &res.old_cinfo);
3135 update_changeattr(new_dir, &res.new_cinfo);
3140 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3141 struct inode *new_dir, struct qstr *new_name)
3143 struct nfs4_exception exception = { };
3146 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3147 _nfs4_proc_rename(old_dir, old_name,
3150 } while (exception.retry);
3154 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3156 struct nfs_server *server = NFS_SERVER(inode);
3157 struct nfs4_link_arg arg = {
3158 .fh = NFS_FH(inode),
3159 .dir_fh = NFS_FH(dir),
3161 .bitmask = server->attr_bitmask,
3163 struct nfs4_link_res res = {
3166 struct rpc_message msg = {
3167 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3171 int status = -ENOMEM;
3173 res.fattr = nfs_alloc_fattr();
3174 if (res.fattr == NULL)
3177 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3179 update_changeattr(dir, &res.cinfo);
3180 nfs_post_op_update_inode(inode, res.fattr);
3183 nfs_free_fattr(res.fattr);
3187 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3189 struct nfs4_exception exception = { };
3192 err = nfs4_handle_exception(NFS_SERVER(inode),
3193 _nfs4_proc_link(inode, dir, name),
3195 } while (exception.retry);
3199 struct nfs4_createdata {
3200 struct rpc_message msg;
3201 struct nfs4_create_arg arg;
3202 struct nfs4_create_res res;
3204 struct nfs_fattr fattr;
3207 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3208 struct qstr *name, struct iattr *sattr, u32 ftype)
3210 struct nfs4_createdata *data;
3212 data = kzalloc(sizeof(*data), GFP_KERNEL);
3214 struct nfs_server *server = NFS_SERVER(dir);
3216 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3217 data->msg.rpc_argp = &data->arg;
3218 data->msg.rpc_resp = &data->res;
3219 data->arg.dir_fh = NFS_FH(dir);
3220 data->arg.server = server;
3221 data->arg.name = name;
3222 data->arg.attrs = sattr;
3223 data->arg.ftype = ftype;
3224 data->arg.bitmask = server->attr_bitmask;
3225 data->res.server = server;
3226 data->res.fh = &data->fh;
3227 data->res.fattr = &data->fattr;
3228 nfs_fattr_init(data->res.fattr);
3233 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3235 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3236 &data->arg.seq_args, &data->res.seq_res, 1);
3238 update_changeattr(dir, &data->res.dir_cinfo);
3239 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3244 static void nfs4_free_createdata(struct nfs4_createdata *data)
3249 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3250 struct page *page, unsigned int len, struct iattr *sattr)
3252 struct nfs4_createdata *data;
3253 int status = -ENAMETOOLONG;
3255 if (len > NFS4_MAXPATHLEN)
3259 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3263 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3264 data->arg.u.symlink.pages = &page;
3265 data->arg.u.symlink.len = len;
3267 status = nfs4_do_create(dir, dentry, data);
3269 nfs4_free_createdata(data);
3274 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3275 struct page *page, unsigned int len, struct iattr *sattr)
3277 struct nfs4_exception exception = { };
3280 err = nfs4_handle_exception(NFS_SERVER(dir),
3281 _nfs4_proc_symlink(dir, dentry, page,
3284 } while (exception.retry);
3288 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3289 struct iattr *sattr)
3291 struct nfs4_createdata *data;
3292 int status = -ENOMEM;
3294 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3298 status = nfs4_do_create(dir, dentry, data);
3300 nfs4_free_createdata(data);
3305 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3306 struct iattr *sattr)
3308 struct nfs4_exception exception = { };
3311 sattr->ia_mode &= ~current_umask();
3313 err = nfs4_handle_exception(NFS_SERVER(dir),
3314 _nfs4_proc_mkdir(dir, dentry, sattr),
3316 } while (exception.retry);
3320 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3321 u64 cookie, struct page **pages, unsigned int count, int plus)
3323 struct inode *dir = dentry->d_inode;
3324 struct nfs4_readdir_arg args = {
3329 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3332 struct nfs4_readdir_res res;
3333 struct rpc_message msg = {
3334 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3341 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3342 dentry->d_parent->d_name.name,
3343 dentry->d_name.name,
3344 (unsigned long long)cookie);
3345 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
3346 res.pgbase = args.pgbase;
3347 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3349 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
3350 status += args.pgbase;
3353 nfs_invalidate_atime(dir);
3355 dprintk("%s: returns %d\n", __func__, status);
3359 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3360 u64 cookie, struct page **pages, unsigned int count, int plus)
3362 struct nfs4_exception exception = { };
3365 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3366 _nfs4_proc_readdir(dentry, cred, cookie,
3367 pages, count, plus),
3369 } while (exception.retry);
3373 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3374 struct iattr *sattr, dev_t rdev)
3376 struct nfs4_createdata *data;
3377 int mode = sattr->ia_mode;
3378 int status = -ENOMEM;
3380 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3385 data->arg.ftype = NF4FIFO;
3386 else if (S_ISBLK(mode)) {
3387 data->arg.ftype = NF4BLK;
3388 data->arg.u.device.specdata1 = MAJOR(rdev);
3389 data->arg.u.device.specdata2 = MINOR(rdev);
3391 else if (S_ISCHR(mode)) {
3392 data->arg.ftype = NF4CHR;
3393 data->arg.u.device.specdata1 = MAJOR(rdev);
3394 data->arg.u.device.specdata2 = MINOR(rdev);
3395 } else if (!S_ISSOCK(mode)) {
3400 status = nfs4_do_create(dir, dentry, data);
3402 nfs4_free_createdata(data);
3407 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3408 struct iattr *sattr, dev_t rdev)
3410 struct nfs4_exception exception = { };
3413 sattr->ia_mode &= ~current_umask();
3415 err = nfs4_handle_exception(NFS_SERVER(dir),
3416 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3418 } while (exception.retry);
3422 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3423 struct nfs_fsstat *fsstat)
3425 struct nfs4_statfs_arg args = {
3427 .bitmask = server->attr_bitmask,
3429 struct nfs4_statfs_res res = {
3432 struct rpc_message msg = {
3433 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3438 nfs_fattr_init(fsstat->fattr);
3439 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3442 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3444 struct nfs4_exception exception = { };
3447 err = nfs4_handle_exception(server,
3448 _nfs4_proc_statfs(server, fhandle, fsstat),
3450 } while (exception.retry);
3454 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3455 struct nfs_fsinfo *fsinfo)
3457 struct nfs4_fsinfo_arg args = {
3459 .bitmask = server->attr_bitmask,
3461 struct nfs4_fsinfo_res res = {
3464 struct rpc_message msg = {
3465 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3470 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3473 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3475 struct nfs4_exception exception = { };
3479 err = nfs4_handle_exception(server,
3480 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3482 } while (exception.retry);
3486 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3490 nfs_fattr_init(fsinfo->fattr);
3491 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
3493 /* block layout checks this! */
3494 server->pnfs_blksize = fsinfo->blksize;
3495 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
3501 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3502 struct nfs_pathconf *pathconf)
3504 struct nfs4_pathconf_arg args = {
3506 .bitmask = server->attr_bitmask,
3508 struct nfs4_pathconf_res res = {
3509 .pathconf = pathconf,
3511 struct rpc_message msg = {
3512 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3517 /* None of the pathconf attributes are mandatory to implement */
3518 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3519 memset(pathconf, 0, sizeof(*pathconf));
3523 nfs_fattr_init(pathconf->fattr);
3524 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3527 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3528 struct nfs_pathconf *pathconf)
3530 struct nfs4_exception exception = { };
3534 err = nfs4_handle_exception(server,
3535 _nfs4_proc_pathconf(server, fhandle, pathconf),
3537 } while (exception.retry);
3541 int nfs4_set_rw_stateid(nfs4_stateid *stateid,
3542 const struct nfs_open_context *ctx,
3543 const struct nfs_lock_context *l_ctx,
3546 const struct nfs_lockowner *lockowner = NULL;
3549 lockowner = &l_ctx->lockowner;
3550 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
3552 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3554 static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3555 const struct nfs_open_context *ctx,
3556 const struct nfs_lock_context *l_ctx,
3559 nfs4_stateid current_stateid;
3561 if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode))
3563 return nfs4_stateid_match(stateid, ¤t_stateid);
3566 static bool nfs4_error_stateid_expired(int err)
3569 case -NFS4ERR_DELEG_REVOKED:
3570 case -NFS4ERR_ADMIN_REVOKED:
3571 case -NFS4ERR_BAD_STATEID:
3572 case -NFS4ERR_STALE_STATEID:
3573 case -NFS4ERR_OLD_STATEID:
3574 case -NFS4ERR_OPENMODE:
3575 case -NFS4ERR_EXPIRED:
3581 void __nfs4_read_done_cb(struct nfs_read_data *data)
3583 nfs_invalidate_atime(data->header->inode);
3586 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3588 struct nfs_server *server = NFS_SERVER(data->header->inode);
3590 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3591 rpc_restart_call_prepare(task);
3595 __nfs4_read_done_cb(data);
3596 if (task->tk_status > 0)
3597 renew_lease(server, data->timestamp);
3601 static bool nfs4_read_stateid_changed(struct rpc_task *task,
3602 struct nfs_readargs *args)
3605 if (!nfs4_error_stateid_expired(task->tk_status) ||
3606 nfs4_stateid_is_current(&args->stateid,
3611 rpc_restart_call_prepare(task);
3615 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3618 dprintk("--> %s\n", __func__);
3620 if (!nfs4_sequence_done(task, &data->res.seq_res))
3622 if (nfs4_read_stateid_changed(task, &data->args))
3624 return data->read_done_cb ? data->read_done_cb(task, data) :
3625 nfs4_read_done_cb(task, data);
3628 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3630 data->timestamp = jiffies;
3631 data->read_done_cb = nfs4_read_done_cb;
3632 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3633 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
3636 static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3638 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3639 &data->args.seq_args,
3643 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3644 data->args.lock_context, FMODE_READ);
3647 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3649 struct inode *inode = data->header->inode;
3651 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3652 rpc_restart_call_prepare(task);
3655 if (task->tk_status >= 0) {
3656 renew_lease(NFS_SERVER(inode), data->timestamp);
3657 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
3662 static bool nfs4_write_stateid_changed(struct rpc_task *task,
3663 struct nfs_writeargs *args)
3666 if (!nfs4_error_stateid_expired(task->tk_status) ||
3667 nfs4_stateid_is_current(&args->stateid,
3672 rpc_restart_call_prepare(task);
3676 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3678 if (!nfs4_sequence_done(task, &data->res.seq_res))
3680 if (nfs4_write_stateid_changed(task, &data->args))
3682 return data->write_done_cb ? data->write_done_cb(task, data) :
3683 nfs4_write_done_cb(task, data);
3687 bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
3689 const struct nfs_pgio_header *hdr = data->header;
3691 /* Don't request attributes for pNFS or O_DIRECT writes */
3692 if (data->ds_clp != NULL || hdr->dreq != NULL)
3694 /* Otherwise, request attributes if and only if we don't hold
3697 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
3700 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3702 struct nfs_server *server = NFS_SERVER(data->header->inode);
3704 if (!nfs4_write_need_cache_consistency_data(data)) {
3705 data->args.bitmask = NULL;
3706 data->res.fattr = NULL;
3708 data->args.bitmask = server->cache_consistency_bitmask;
3710 if (!data->write_done_cb)
3711 data->write_done_cb = nfs4_write_done_cb;
3712 data->res.server = server;
3713 data->timestamp = jiffies;
3715 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3716 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3719 static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3721 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3722 &data->args.seq_args,
3726 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3727 data->args.lock_context, FMODE_WRITE);
3730 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
3732 nfs4_setup_sequence(NFS_SERVER(data->inode),
3733 &data->args.seq_args,
3738 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
3740 struct inode *inode = data->inode;
3742 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3743 rpc_restart_call_prepare(task);
3749 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
3751 if (!nfs4_sequence_done(task, &data->res.seq_res))
3753 return data->commit_done_cb(task, data);
3756 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
3758 struct nfs_server *server = NFS_SERVER(data->inode);
3760 if (data->commit_done_cb == NULL)
3761 data->commit_done_cb = nfs4_commit_done_cb;
3762 data->res.server = server;
3763 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3764 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3767 struct nfs4_renewdata {
3768 struct nfs_client *client;
3769 unsigned long timestamp;
3773 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3774 * standalone procedure for queueing an asynchronous RENEW.
3776 static void nfs4_renew_release(void *calldata)
3778 struct nfs4_renewdata *data = calldata;
3779 struct nfs_client *clp = data->client;
3781 if (atomic_read(&clp->cl_count) > 1)
3782 nfs4_schedule_state_renewal(clp);
3783 nfs_put_client(clp);
3787 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3789 struct nfs4_renewdata *data = calldata;
3790 struct nfs_client *clp = data->client;
3791 unsigned long timestamp = data->timestamp;
3793 if (task->tk_status < 0) {
3794 /* Unless we're shutting down, schedule state recovery! */
3795 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3797 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3798 nfs4_schedule_lease_recovery(clp);
3801 nfs4_schedule_path_down_recovery(clp);
3803 do_renew_lease(clp, timestamp);
3806 static const struct rpc_call_ops nfs4_renew_ops = {
3807 .rpc_call_done = nfs4_renew_done,
3808 .rpc_release = nfs4_renew_release,
3811 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3813 struct rpc_message msg = {
3814 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3818 struct nfs4_renewdata *data;
3820 if (renew_flags == 0)
3822 if (!atomic_inc_not_zero(&clp->cl_count))
3824 data = kmalloc(sizeof(*data), GFP_NOFS);
3828 data->timestamp = jiffies;
3829 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
3830 &nfs4_renew_ops, data);
3833 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3835 struct rpc_message msg = {
3836 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3840 unsigned long now = jiffies;
3843 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3846 do_renew_lease(clp, now);
3850 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3852 return (server->caps & NFS_CAP_ACLS)
3853 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3854 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3857 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3858 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
3861 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
3863 static int buf_to_pages_noslab(const void *buf, size_t buflen,
3864 struct page **pages, unsigned int *pgbase)
3866 struct page *newpage, **spages;
3872 len = min_t(size_t, PAGE_SIZE, buflen);
3873 newpage = alloc_page(GFP_KERNEL);
3875 if (newpage == NULL)
3877 memcpy(page_address(newpage), buf, len);
3882 } while (buflen != 0);
3888 __free_page(spages[rc-1]);
3892 struct nfs4_cached_acl {
3898 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3900 struct nfs_inode *nfsi = NFS_I(inode);
3902 spin_lock(&inode->i_lock);
3903 kfree(nfsi->nfs4_acl);
3904 nfsi->nfs4_acl = acl;
3905 spin_unlock(&inode->i_lock);
3908 static void nfs4_zap_acl_attr(struct inode *inode)
3910 nfs4_set_cached_acl(inode, NULL);
3913 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3915 struct nfs_inode *nfsi = NFS_I(inode);
3916 struct nfs4_cached_acl *acl;
3919 spin_lock(&inode->i_lock);
3920 acl = nfsi->nfs4_acl;
3923 if (buf == NULL) /* user is just asking for length */
3925 if (acl->cached == 0)
3927 ret = -ERANGE; /* see getxattr(2) man page */
3928 if (acl->len > buflen)
3930 memcpy(buf, acl->data, acl->len);
3934 spin_unlock(&inode->i_lock);
3938 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
3940 struct nfs4_cached_acl *acl;
3941 size_t buflen = sizeof(*acl) + acl_len;
3943 if (buflen <= PAGE_SIZE) {
3944 acl = kmalloc(buflen, GFP_KERNEL);
3948 _copy_from_pages(acl->data, pages, pgbase, acl_len);
3950 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3957 nfs4_set_cached_acl(inode, acl);
3961 * The getxattr API returns the required buffer length when called with a
3962 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3963 * the required buf. On a NULL buf, we send a page of data to the server
3964 * guessing that the ACL request can be serviced by a page. If so, we cache
3965 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3966 * the cache. If not so, we throw away the page, and cache the required
3967 * length. The next getxattr call will then produce another round trip to
3968 * the server, this time with the input buf of the required size.
3970 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3972 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
3973 struct nfs_getaclargs args = {
3974 .fh = NFS_FH(inode),
3978 struct nfs_getaclres res = {
3981 struct rpc_message msg = {
3982 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3986 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3987 int ret = -ENOMEM, i;
3989 /* As long as we're doing a round trip to the server anyway,
3990 * let's be prepared for a page of acl data. */
3993 if (npages > ARRAY_SIZE(pages))
3996 for (i = 0; i < npages; i++) {
3997 pages[i] = alloc_page(GFP_KERNEL);
4002 /* for decoding across pages */
4003 res.acl_scratch = alloc_page(GFP_KERNEL);
4004 if (!res.acl_scratch)
4007 args.acl_len = npages * PAGE_SIZE;
4008 args.acl_pgbase = 0;
4010 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
4011 __func__, buf, buflen, npages, args.acl_len);
4012 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4013 &msg, &args.seq_args, &res.seq_res, 0);
4017 /* Handle the case where the passed-in buffer is too short */
4018 if (res.acl_flags & NFS4_ACL_TRUNC) {
4019 /* Did the user only issue a request for the acl length? */
4025 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
4027 if (res.acl_len > buflen) {
4031 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
4036 for (i = 0; i < npages; i++)
4038 __free_page(pages[i]);
4039 if (res.acl_scratch)
4040 __free_page(res.acl_scratch);
4044 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4046 struct nfs4_exception exception = { };
4049 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4052 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4053 } while (exception.retry);
4057 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4059 struct nfs_server *server = NFS_SERVER(inode);
4062 if (!nfs4_server_supports_acls(server))
4064 ret = nfs_revalidate_inode(server, inode);
4067 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4068 nfs_zap_acl_cache(inode);
4069 ret = nfs4_read_cached_acl(inode, buf, buflen);
4071 /* -ENOENT is returned if there is no ACL or if there is an ACL
4072 * but no cached acl data, just the acl length */
4074 return nfs4_get_acl_uncached(inode, buf, buflen);
4077 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4079 struct nfs_server *server = NFS_SERVER(inode);
4080 struct page *pages[NFS4ACL_MAXPAGES];
4081 struct nfs_setaclargs arg = {
4082 .fh = NFS_FH(inode),
4086 struct nfs_setaclres res;
4087 struct rpc_message msg = {
4088 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4092 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4095 if (!nfs4_server_supports_acls(server))
4097 if (npages > ARRAY_SIZE(pages))
4099 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4102 nfs4_inode_return_delegation(inode);
4103 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4106 * Free each page after tx, so the only ref left is
4107 * held by the network stack
4110 put_page(pages[i-1]);
4113 * Acl update can result in inode attribute update.
4114 * so mark the attribute cache invalid.
4116 spin_lock(&inode->i_lock);
4117 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4118 spin_unlock(&inode->i_lock);
4119 nfs_access_zap_cache(inode);
4120 nfs_zap_acl_cache(inode);
4124 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4126 struct nfs4_exception exception = { };
4129 err = nfs4_handle_exception(NFS_SERVER(inode),
4130 __nfs4_proc_set_acl(inode, buf, buflen),
4132 } while (exception.retry);
4137 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
4139 struct nfs_client *clp = server->nfs_client;
4141 if (task->tk_status >= 0)
4143 switch(task->tk_status) {
4144 case -NFS4ERR_DELEG_REVOKED:
4145 case -NFS4ERR_ADMIN_REVOKED:
4146 case -NFS4ERR_BAD_STATEID:
4149 nfs_remove_bad_delegation(state->inode);
4150 case -NFS4ERR_OPENMODE:
4153 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4154 goto stateid_invalid;
4155 goto wait_on_recovery;
4156 case -NFS4ERR_EXPIRED:
4157 if (state != NULL) {
4158 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4159 goto stateid_invalid;
4161 case -NFS4ERR_STALE_STATEID:
4162 case -NFS4ERR_STALE_CLIENTID:
4163 nfs4_schedule_lease_recovery(clp);
4164 goto wait_on_recovery;
4165 #if defined(CONFIG_NFS_V4_1)
4166 case -NFS4ERR_BADSESSION:
4167 case -NFS4ERR_BADSLOT:
4168 case -NFS4ERR_BAD_HIGH_SLOT:
4169 case -NFS4ERR_DEADSESSION:
4170 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4171 case -NFS4ERR_SEQ_FALSE_RETRY:
4172 case -NFS4ERR_SEQ_MISORDERED:
4173 dprintk("%s ERROR %d, Reset session\n", __func__,
4175 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4176 task->tk_status = 0;
4178 #endif /* CONFIG_NFS_V4_1 */
4179 case -NFS4ERR_DELAY:
4180 nfs_inc_server_stats(server, NFSIOS_DELAY);
4181 case -NFS4ERR_GRACE:
4182 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4183 task->tk_status = 0;
4185 case -NFS4ERR_RETRY_UNCACHED_REP:
4186 case -NFS4ERR_OLD_STATEID:
4187 task->tk_status = 0;
4190 task->tk_status = nfs4_map_errors(task->tk_status);
4193 task->tk_status = -EIO;
4196 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
4197 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4198 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4199 task->tk_status = 0;
4203 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4204 nfs4_verifier *bootverf)
4208 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4209 /* An impossible timestamp guarantees this value
4210 * will never match a generated boot time. */
4212 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4214 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4215 verf[0] = (__be32)nn->boot_time.tv_sec;
4216 verf[1] = (__be32)nn->boot_time.tv_nsec;
4218 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4222 nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4223 char *buf, size_t len)
4225 unsigned int result;
4228 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4230 rpc_peeraddr2str(clp->cl_rpcclient,
4232 rpc_peeraddr2str(clp->cl_rpcclient,
4233 RPC_DISPLAY_PROTO));
4239 nfs4_init_uniform_client_string(const struct nfs_client *clp,
4240 char *buf, size_t len)
4242 char *nodename = clp->cl_rpcclient->cl_nodename;
4244 if (nfs4_client_id_uniquifier[0] != '\0')
4245 nodename = nfs4_client_id_uniquifier;
4246 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4247 clp->rpc_ops->version, clp->cl_minorversion,
4252 * nfs4_proc_setclientid - Negotiate client ID
4253 * @clp: state data structure
4254 * @program: RPC program for NFSv4 callback service
4255 * @port: IP port number for NFS4 callback service
4256 * @cred: RPC credential to use for this call
4257 * @res: where to place the result
4259 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4261 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4262 unsigned short port, struct rpc_cred *cred,
4263 struct nfs4_setclientid_res *res)
4265 nfs4_verifier sc_verifier;
4266 struct nfs4_setclientid setclientid = {
4267 .sc_verifier = &sc_verifier,
4269 .sc_cb_ident = clp->cl_cb_ident,
4271 struct rpc_message msg = {
4272 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4273 .rpc_argp = &setclientid,
4279 /* nfs_client_id4 */
4280 nfs4_init_boot_verifier(clp, &sc_verifier);
4281 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4282 setclientid.sc_name_len =
4283 nfs4_init_uniform_client_string(clp,
4284 setclientid.sc_name,
4285 sizeof(setclientid.sc_name));
4287 setclientid.sc_name_len =
4288 nfs4_init_nonuniform_client_string(clp,
4289 setclientid.sc_name,
4290 sizeof(setclientid.sc_name));
4293 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
4294 sizeof(setclientid.sc_netid),
4295 rpc_peeraddr2str(clp->cl_rpcclient,
4296 RPC_DISPLAY_NETID));
4298 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
4299 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
4300 clp->cl_ipaddr, port >> 8, port & 255);
4302 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4303 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4304 setclientid.sc_name_len, setclientid.sc_name);
4305 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4306 dprintk("NFS reply setclientid: %d\n", status);
4311 * nfs4_proc_setclientid_confirm - Confirm client ID
4312 * @clp: state data structure
4313 * @res: result of a previous SETCLIENTID
4314 * @cred: RPC credential to use for this call
4316 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4318 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
4319 struct nfs4_setclientid_res *arg,
4320 struct rpc_cred *cred)
4322 struct nfs_fsinfo fsinfo;
4323 struct rpc_message msg = {
4324 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
4326 .rpc_resp = &fsinfo,
4332 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4333 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4336 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4338 spin_lock(&clp->cl_lock);
4339 clp->cl_lease_time = fsinfo.lease_time * HZ;
4340 clp->cl_last_renewal = now;
4341 spin_unlock(&clp->cl_lock);
4343 dprintk("NFS reply setclientid_confirm: %d\n", status);
4347 struct nfs4_delegreturndata {
4348 struct nfs4_delegreturnargs args;
4349 struct nfs4_delegreturnres res;
4351 nfs4_stateid stateid;
4352 unsigned long timestamp;
4353 struct nfs_fattr fattr;
4357 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4359 struct nfs4_delegreturndata *data = calldata;
4361 if (!nfs4_sequence_done(task, &data->res.seq_res))
4364 switch (task->tk_status) {
4365 case -NFS4ERR_STALE_STATEID:
4366 case -NFS4ERR_EXPIRED:
4368 renew_lease(data->res.server, data->timestamp);
4371 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4373 rpc_restart_call_prepare(task);
4377 data->rpc_status = task->tk_status;
4380 static void nfs4_delegreturn_release(void *calldata)
4385 #if defined(CONFIG_NFS_V4_1)
4386 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4388 struct nfs4_delegreturndata *d_data;
4390 d_data = (struct nfs4_delegreturndata *)data;
4392 nfs4_setup_sequence(d_data->res.server,
4393 &d_data->args.seq_args,
4394 &d_data->res.seq_res,
4397 #endif /* CONFIG_NFS_V4_1 */
4399 static const struct rpc_call_ops nfs4_delegreturn_ops = {
4400 #if defined(CONFIG_NFS_V4_1)
4401 .rpc_call_prepare = nfs4_delegreturn_prepare,
4402 #endif /* CONFIG_NFS_V4_1 */
4403 .rpc_call_done = nfs4_delegreturn_done,
4404 .rpc_release = nfs4_delegreturn_release,
4407 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4409 struct nfs4_delegreturndata *data;
4410 struct nfs_server *server = NFS_SERVER(inode);
4411 struct rpc_task *task;
4412 struct rpc_message msg = {
4413 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4416 struct rpc_task_setup task_setup_data = {
4417 .rpc_client = server->client,
4418 .rpc_message = &msg,
4419 .callback_ops = &nfs4_delegreturn_ops,
4420 .flags = RPC_TASK_ASYNC,
4424 data = kzalloc(sizeof(*data), GFP_NOFS);
4427 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4428 data->args.fhandle = &data->fh;
4429 data->args.stateid = &data->stateid;
4430 data->args.bitmask = server->cache_consistency_bitmask;
4431 nfs_copy_fh(&data->fh, NFS_FH(inode));
4432 nfs4_stateid_copy(&data->stateid, stateid);
4433 data->res.fattr = &data->fattr;
4434 data->res.server = server;
4435 nfs_fattr_init(data->res.fattr);
4436 data->timestamp = jiffies;
4437 data->rpc_status = 0;
4439 task_setup_data.callback_data = data;
4440 msg.rpc_argp = &data->args;
4441 msg.rpc_resp = &data->res;
4442 task = rpc_run_task(&task_setup_data);
4444 return PTR_ERR(task);
4447 status = nfs4_wait_for_completion_rpc_task(task);
4450 status = data->rpc_status;
4452 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4454 nfs_refresh_inode(inode, &data->fattr);
4460 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4462 struct nfs_server *server = NFS_SERVER(inode);
4463 struct nfs4_exception exception = { };
4466 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
4468 case -NFS4ERR_STALE_STATEID:
4469 case -NFS4ERR_EXPIRED:
4473 err = nfs4_handle_exception(server, err, &exception);
4474 } while (exception.retry);
4478 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4479 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4482 * sleep, with exponential backoff, and retry the LOCK operation.
4484 static unsigned long
4485 nfs4_set_lock_task_retry(unsigned long timeout)
4487 freezable_schedule_timeout_killable(timeout);
4489 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4490 return NFS4_LOCK_MAXTIMEOUT;
4494 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4496 struct inode *inode = state->inode;
4497 struct nfs_server *server = NFS_SERVER(inode);
4498 struct nfs_client *clp = server->nfs_client;
4499 struct nfs_lockt_args arg = {
4500 .fh = NFS_FH(inode),
4503 struct nfs_lockt_res res = {
4506 struct rpc_message msg = {
4507 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4510 .rpc_cred = state->owner->so_cred,
4512 struct nfs4_lock_state *lsp;
4515 arg.lock_owner.clientid = clp->cl_clientid;
4516 status = nfs4_set_lock_state(state, request);
4519 lsp = request->fl_u.nfs4_fl.owner;
4520 arg.lock_owner.id = lsp->ls_seqid.owner_id;
4521 arg.lock_owner.s_dev = server->s_dev;
4522 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4525 request->fl_type = F_UNLCK;
4527 case -NFS4ERR_DENIED:
4530 request->fl_ops->fl_release_private(request);
4535 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4537 struct nfs4_exception exception = { };
4541 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4542 _nfs4_proc_getlk(state, cmd, request),
4544 } while (exception.retry);
4548 static int do_vfs_lock(struct file *file, struct file_lock *fl)
4551 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4553 res = posix_lock_file_wait(file, fl);
4556 res = flock_lock_file_wait(file, fl);
4564 struct nfs4_unlockdata {
4565 struct nfs_locku_args arg;
4566 struct nfs_locku_res res;
4567 struct nfs4_lock_state *lsp;
4568 struct nfs_open_context *ctx;
4569 struct file_lock fl;
4570 const struct nfs_server *server;
4571 unsigned long timestamp;
4574 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4575 struct nfs_open_context *ctx,
4576 struct nfs4_lock_state *lsp,
4577 struct nfs_seqid *seqid)
4579 struct nfs4_unlockdata *p;
4580 struct inode *inode = lsp->ls_state->inode;
4582 p = kzalloc(sizeof(*p), GFP_NOFS);
4585 p->arg.fh = NFS_FH(inode);
4587 p->arg.seqid = seqid;
4588 p->res.seqid = seqid;
4589 p->arg.stateid = &lsp->ls_stateid;
4591 atomic_inc(&lsp->ls_count);
4592 /* Ensure we don't close file until we're done freeing locks! */
4593 p->ctx = get_nfs_open_context(ctx);
4594 memcpy(&p->fl, fl, sizeof(p->fl));
4595 p->server = NFS_SERVER(inode);
4599 static void nfs4_locku_release_calldata(void *data)
4601 struct nfs4_unlockdata *calldata = data;
4602 nfs_free_seqid(calldata->arg.seqid);
4603 nfs4_put_lock_state(calldata->lsp);
4604 put_nfs_open_context(calldata->ctx);
4608 static void nfs4_locku_done(struct rpc_task *task, void *data)
4610 struct nfs4_unlockdata *calldata = data;
4612 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4614 switch (task->tk_status) {
4616 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4617 &calldata->res.stateid);
4618 renew_lease(calldata->server, calldata->timestamp);
4620 case -NFS4ERR_BAD_STATEID:
4621 case -NFS4ERR_OLD_STATEID:
4622 case -NFS4ERR_STALE_STATEID:
4623 case -NFS4ERR_EXPIRED:
4626 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4627 rpc_restart_call_prepare(task);
4629 nfs_release_seqid(calldata->arg.seqid);
4632 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4634 struct nfs4_unlockdata *calldata = data;
4636 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4638 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
4639 /* Note: exit _without_ running nfs4_locku_done */
4642 calldata->timestamp = jiffies;
4643 if (nfs4_setup_sequence(calldata->server,
4644 &calldata->arg.seq_args,
4645 &calldata->res.seq_res,
4647 nfs_release_seqid(calldata->arg.seqid);
4650 task->tk_action = NULL;
4652 nfs4_sequence_done(task, &calldata->res.seq_res);
4655 static const struct rpc_call_ops nfs4_locku_ops = {
4656 .rpc_call_prepare = nfs4_locku_prepare,
4657 .rpc_call_done = nfs4_locku_done,
4658 .rpc_release = nfs4_locku_release_calldata,
4661 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4662 struct nfs_open_context *ctx,
4663 struct nfs4_lock_state *lsp,
4664 struct nfs_seqid *seqid)
4666 struct nfs4_unlockdata *data;
4667 struct rpc_message msg = {
4668 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4669 .rpc_cred = ctx->cred,
4671 struct rpc_task_setup task_setup_data = {
4672 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4673 .rpc_message = &msg,
4674 .callback_ops = &nfs4_locku_ops,
4675 .workqueue = nfsiod_workqueue,
4676 .flags = RPC_TASK_ASYNC,
4679 /* Ensure this is an unlock - when canceling a lock, the
4680 * canceled lock is passed in, and it won't be an unlock.
4682 fl->fl_type = F_UNLCK;
4684 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4686 nfs_free_seqid(seqid);
4687 return ERR_PTR(-ENOMEM);
4690 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4691 msg.rpc_argp = &data->arg;
4692 msg.rpc_resp = &data->res;
4693 task_setup_data.callback_data = data;
4694 return rpc_run_task(&task_setup_data);
4697 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4699 struct inode *inode = state->inode;
4700 struct nfs4_state_owner *sp = state->owner;
4701 struct nfs_inode *nfsi = NFS_I(inode);
4702 struct nfs_seqid *seqid;
4703 struct nfs4_lock_state *lsp;
4704 struct rpc_task *task;
4706 unsigned char fl_flags = request->fl_flags;
4708 status = nfs4_set_lock_state(state, request);
4709 /* Unlock _before_ we do the RPC call */
4710 request->fl_flags |= FL_EXISTS;
4711 /* Exclude nfs_delegation_claim_locks() */
4712 mutex_lock(&sp->so_delegreturn_mutex);
4713 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
4714 down_read(&nfsi->rwsem);
4715 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4716 up_read(&nfsi->rwsem);
4717 mutex_unlock(&sp->so_delegreturn_mutex);
4720 up_read(&nfsi->rwsem);
4721 mutex_unlock(&sp->so_delegreturn_mutex);
4724 /* Is this a delegated lock? */
4725 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4727 lsp = request->fl_u.nfs4_fl.owner;
4728 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4732 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4733 status = PTR_ERR(task);
4736 status = nfs4_wait_for_completion_rpc_task(task);
4739 request->fl_flags = fl_flags;
4743 struct nfs4_lockdata {
4744 struct nfs_lock_args arg;
4745 struct nfs_lock_res res;
4746 struct nfs4_lock_state *lsp;
4747 struct nfs_open_context *ctx;
4748 struct file_lock fl;
4749 unsigned long timestamp;
4752 struct nfs_server *server;
4755 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4756 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4759 struct nfs4_lockdata *p;
4760 struct inode *inode = lsp->ls_state->inode;
4761 struct nfs_server *server = NFS_SERVER(inode);
4763 p = kzalloc(sizeof(*p), gfp_mask);
4767 p->arg.fh = NFS_FH(inode);
4769 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4770 if (p->arg.open_seqid == NULL)
4772 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4773 if (p->arg.lock_seqid == NULL)
4774 goto out_free_seqid;
4775 p->arg.lock_stateid = &lsp->ls_stateid;
4776 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4777 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
4778 p->arg.lock_owner.s_dev = server->s_dev;
4779 p->res.lock_seqid = p->arg.lock_seqid;
4782 atomic_inc(&lsp->ls_count);
4783 p->ctx = get_nfs_open_context(ctx);
4784 memcpy(&p->fl, fl, sizeof(p->fl));
4787 nfs_free_seqid(p->arg.open_seqid);
4793 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4795 struct nfs4_lockdata *data = calldata;
4796 struct nfs4_state *state = data->lsp->ls_state;
4798 dprintk("%s: begin!\n", __func__);
4799 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4801 /* Do we need to do an open_to_lock_owner? */
4802 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4803 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
4804 goto out_release_lock_seqid;
4806 data->arg.open_stateid = &state->open_stateid;
4807 data->arg.new_lock_owner = 1;
4808 data->res.open_seqid = data->arg.open_seqid;
4810 data->arg.new_lock_owner = 0;
4811 if (!nfs4_valid_open_stateid(state)) {
4812 data->rpc_status = -EBADF;
4813 task->tk_action = NULL;
4814 goto out_release_open_seqid;
4816 data->timestamp = jiffies;
4817 if (nfs4_setup_sequence(data->server,
4818 &data->arg.seq_args,
4822 out_release_open_seqid:
4823 nfs_release_seqid(data->arg.open_seqid);
4824 out_release_lock_seqid:
4825 nfs_release_seqid(data->arg.lock_seqid);
4827 nfs4_sequence_done(task, &data->res.seq_res);
4828 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4831 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4833 struct nfs4_lockdata *data = calldata;
4835 dprintk("%s: begin!\n", __func__);
4837 if (!nfs4_sequence_done(task, &data->res.seq_res))
4840 data->rpc_status = task->tk_status;
4841 if (data->arg.new_lock_owner != 0) {
4842 if (data->rpc_status == 0)
4843 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4847 if (data->rpc_status == 0) {
4848 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
4849 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
4850 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4853 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4856 static void nfs4_lock_release(void *calldata)
4858 struct nfs4_lockdata *data = calldata;
4860 dprintk("%s: begin!\n", __func__);
4861 nfs_free_seqid(data->arg.open_seqid);
4862 if (data->cancelled != 0) {
4863 struct rpc_task *task;
4864 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4865 data->arg.lock_seqid);
4867 rpc_put_task_async(task);
4868 dprintk("%s: cancelling lock!\n", __func__);
4870 nfs_free_seqid(data->arg.lock_seqid);
4871 nfs4_put_lock_state(data->lsp);
4872 put_nfs_open_context(data->ctx);
4874 dprintk("%s: done!\n", __func__);
4877 static const struct rpc_call_ops nfs4_lock_ops = {
4878 .rpc_call_prepare = nfs4_lock_prepare,
4879 .rpc_call_done = nfs4_lock_done,
4880 .rpc_release = nfs4_lock_release,
4883 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4886 case -NFS4ERR_ADMIN_REVOKED:
4887 case -NFS4ERR_BAD_STATEID:
4888 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4889 if (new_lock_owner != 0 ||
4890 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
4891 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4893 case -NFS4ERR_STALE_STATEID:
4894 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4895 case -NFS4ERR_EXPIRED:
4896 nfs4_schedule_lease_recovery(server->nfs_client);
4900 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4902 struct nfs4_lockdata *data;
4903 struct rpc_task *task;
4904 struct rpc_message msg = {
4905 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4906 .rpc_cred = state->owner->so_cred,
4908 struct rpc_task_setup task_setup_data = {
4909 .rpc_client = NFS_CLIENT(state->inode),
4910 .rpc_message = &msg,
4911 .callback_ops = &nfs4_lock_ops,
4912 .workqueue = nfsiod_workqueue,
4913 .flags = RPC_TASK_ASYNC,
4917 dprintk("%s: begin!\n", __func__);
4918 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4919 fl->fl_u.nfs4_fl.owner,
4920 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4924 data->arg.block = 1;
4925 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4926 msg.rpc_argp = &data->arg;
4927 msg.rpc_resp = &data->res;
4928 task_setup_data.callback_data = data;
4929 if (recovery_type > NFS_LOCK_NEW) {
4930 if (recovery_type == NFS_LOCK_RECLAIM)
4931 data->arg.reclaim = NFS_LOCK_RECLAIM;
4932 nfs4_set_sequence_privileged(&data->arg.seq_args);
4934 task = rpc_run_task(&task_setup_data);
4936 return PTR_ERR(task);
4937 ret = nfs4_wait_for_completion_rpc_task(task);
4939 ret = data->rpc_status;
4941 nfs4_handle_setlk_error(data->server, data->lsp,
4942 data->arg.new_lock_owner, ret);
4944 data->cancelled = 1;
4946 dprintk("%s: done, ret = %d!\n", __func__, ret);
4950 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4952 struct nfs_server *server = NFS_SERVER(state->inode);
4953 struct nfs4_exception exception = {
4954 .inode = state->inode,
4959 /* Cache the lock if possible... */
4960 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4962 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4963 if (err != -NFS4ERR_DELAY)
4965 nfs4_handle_exception(server, err, &exception);
4966 } while (exception.retry);
4970 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4972 struct nfs_server *server = NFS_SERVER(state->inode);
4973 struct nfs4_exception exception = {
4974 .inode = state->inode,
4978 err = nfs4_set_lock_state(state, request);
4982 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4984 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4988 case -NFS4ERR_GRACE:
4989 case -NFS4ERR_DELAY:
4990 nfs4_handle_exception(server, err, &exception);
4993 } while (exception.retry);
4998 #if defined(CONFIG_NFS_V4_1)
5000 * nfs41_check_expired_locks - possibly free a lock stateid
5002 * @state: NFSv4 state for an inode
5004 * Returns NFS_OK if recovery for this stateid is now finished.
5005 * Otherwise a negative NFS4ERR value is returned.
5007 static int nfs41_check_expired_locks(struct nfs4_state *state)
5009 int status, ret = -NFS4ERR_BAD_STATEID;
5010 struct nfs4_lock_state *lsp;
5011 struct nfs_server *server = NFS_SERVER(state->inode);
5013 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
5014 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
5015 status = nfs41_test_stateid(server, &lsp->ls_stateid);
5016 if (status != NFS_OK) {
5017 /* Free the stateid unless the server
5018 * informs us the stateid is unrecognized. */
5019 if (status != -NFS4ERR_BAD_STATEID)
5020 nfs41_free_stateid(server,
5022 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5031 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5033 int status = NFS_OK;
5035 if (test_bit(LK_STATE_IN_USE, &state->flags))
5036 status = nfs41_check_expired_locks(state);
5037 if (status != NFS_OK)
5038 status = nfs4_lock_expired(state, request);
5043 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5045 struct nfs4_state_owner *sp = state->owner;
5046 struct nfs_inode *nfsi = NFS_I(state->inode);
5047 unsigned char fl_flags = request->fl_flags;
5049 int status = -ENOLCK;
5051 if ((fl_flags & FL_POSIX) &&
5052 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5054 /* Is this a delegated open? */
5055 status = nfs4_set_lock_state(state, request);
5058 request->fl_flags |= FL_ACCESS;
5059 status = do_vfs_lock(request->fl_file, request);
5062 down_read(&nfsi->rwsem);
5063 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
5064 /* Yes: cache locks! */
5065 /* ...but avoid races with delegation recall... */
5066 request->fl_flags = fl_flags & ~FL_SLEEP;
5067 status = do_vfs_lock(request->fl_file, request);
5070 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5071 up_read(&nfsi->rwsem);
5072 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
5075 down_read(&nfsi->rwsem);
5076 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5077 status = -NFS4ERR_DELAY;
5080 /* Note: we always want to sleep here! */
5081 request->fl_flags = fl_flags | FL_SLEEP;
5082 if (do_vfs_lock(request->fl_file, request) < 0)
5083 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5084 "manager!\n", __func__);
5086 up_read(&nfsi->rwsem);
5088 request->fl_flags = fl_flags;
5092 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5094 struct nfs4_exception exception = {
5096 .inode = state->inode,
5101 err = _nfs4_proc_setlk(state, cmd, request);
5102 if (err == -NFS4ERR_DENIED)
5104 err = nfs4_handle_exception(NFS_SERVER(state->inode),
5106 } while (exception.retry);
5111 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5113 struct nfs_open_context *ctx;
5114 struct nfs4_state *state;
5115 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5118 /* verify open state */
5119 ctx = nfs_file_open_context(filp);
5122 if (request->fl_start < 0 || request->fl_end < 0)
5125 if (IS_GETLK(cmd)) {
5127 return nfs4_proc_getlk(state, F_GETLK, request);
5131 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5134 if (request->fl_type == F_UNLCK) {
5136 return nfs4_proc_unlck(state, cmd, request);
5143 * Don't rely on the VFS having checked the file open mode,
5144 * since it won't do this for flock() locks.
5146 switch (request->fl_type) {
5148 if (!(filp->f_mode & FMODE_READ))
5152 if (!(filp->f_mode & FMODE_WRITE))
5157 status = nfs4_proc_setlk(state, cmd, request);
5158 if ((status != -EAGAIN) || IS_SETLK(cmd))
5160 timeout = nfs4_set_lock_task_retry(timeout);
5161 status = -ERESTARTSYS;
5164 } while(status < 0);
5168 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
5170 struct nfs_server *server = NFS_SERVER(state->inode);
5173 err = nfs4_set_lock_state(state, fl);
5176 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
5177 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
5180 struct nfs_release_lockowner_data {
5181 struct nfs4_lock_state *lsp;
5182 struct nfs_server *server;
5183 struct nfs_release_lockowner_args args;
5186 static void nfs4_release_lockowner_release(void *calldata)
5188 struct nfs_release_lockowner_data *data = calldata;
5189 nfs4_free_lock_state(data->server, data->lsp);
5193 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
5194 .rpc_release = nfs4_release_lockowner_release,
5197 int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
5199 struct nfs_server *server = lsp->ls_state->owner->so_server;
5200 struct nfs_release_lockowner_data *data;
5201 struct rpc_message msg = {
5202 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5205 if (server->nfs_client->cl_mvops->minor_version != 0)
5207 data = kmalloc(sizeof(*data), GFP_NOFS);
5211 data->server = server;
5212 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5213 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5214 data->args.lock_owner.s_dev = server->s_dev;
5215 msg.rpc_argp = &data->args;
5216 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5220 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5222 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5223 const void *buf, size_t buflen,
5224 int flags, int type)
5226 if (strcmp(key, "") != 0)
5229 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
5232 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5233 void *buf, size_t buflen, int type)
5235 if (strcmp(key, "") != 0)
5238 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
5241 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5242 size_t list_len, const char *name,
5243 size_t name_len, int type)
5245 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
5247 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5250 if (list && len <= list_len)
5251 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
5256 * nfs_fhget will use either the mounted_on_fileid or the fileid
5258 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5260 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5261 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5262 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
5263 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
5266 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
5267 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
5268 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5272 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5273 const struct qstr *name,
5274 struct nfs4_fs_locations *fs_locations,
5277 struct nfs_server *server = NFS_SERVER(dir);
5279 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
5281 struct nfs4_fs_locations_arg args = {
5282 .dir_fh = NFS_FH(dir),
5287 struct nfs4_fs_locations_res res = {
5288 .fs_locations = fs_locations,
5290 struct rpc_message msg = {
5291 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5297 dprintk("%s: start\n", __func__);
5299 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5300 * is not supported */
5301 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5302 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5304 bitmask[0] |= FATTR4_WORD0_FILEID;
5306 nfs_fattr_init(&fs_locations->fattr);
5307 fs_locations->server = server;
5308 fs_locations->nlocations = 0;
5309 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
5310 dprintk("%s: returned status = %d\n", __func__, status);
5314 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5315 const struct qstr *name,
5316 struct nfs4_fs_locations *fs_locations,
5319 struct nfs4_exception exception = { };
5322 err = nfs4_handle_exception(NFS_SERVER(dir),
5323 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
5325 } while (exception.retry);
5329 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5332 struct nfs4_secinfo_arg args = {
5333 .dir_fh = NFS_FH(dir),
5336 struct nfs4_secinfo_res res = {
5339 struct rpc_message msg = {
5340 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5345 dprintk("NFS call secinfo %s\n", name->name);
5346 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5347 dprintk("NFS reply secinfo: %d\n", status);
5351 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5352 struct nfs4_secinfo_flavors *flavors)
5354 struct nfs4_exception exception = { };
5357 err = nfs4_handle_exception(NFS_SERVER(dir),
5358 _nfs4_proc_secinfo(dir, name, flavors),
5360 } while (exception.retry);
5364 #ifdef CONFIG_NFS_V4_1
5366 * Check the exchange flags returned by the server for invalid flags, having
5367 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5370 static int nfs4_check_cl_exchange_flags(u32 flags)
5372 if (flags & ~EXCHGID4_FLAG_MASK_R)
5374 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5375 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5377 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5381 return -NFS4ERR_INVAL;
5385 nfs41_same_server_scope(struct nfs41_server_scope *a,
5386 struct nfs41_server_scope *b)
5388 if (a->server_scope_sz == b->server_scope_sz &&
5389 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5396 * nfs4_proc_bind_conn_to_session()
5398 * The 4.1 client currently uses the same TCP connection for the
5399 * fore and backchannel.
5401 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
5404 struct nfs41_bind_conn_to_session_res res;
5405 struct rpc_message msg = {
5407 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5413 dprintk("--> %s\n", __func__);
5415 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5416 if (unlikely(res.session == NULL)) {
5421 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5423 if (memcmp(res.session->sess_id.data,
5424 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5425 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5429 if (res.dir != NFS4_CDFS4_BOTH) {
5430 dprintk("NFS: %s: Unexpected direction from server\n",
5435 if (res.use_conn_in_rdma_mode) {
5436 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5445 dprintk("<-- %s status= %d\n", __func__, status);
5450 * nfs4_proc_exchange_id()
5452 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5454 * Since the clientid has expired, all compounds using sessions
5455 * associated with the stale clientid will be returning
5456 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5457 * be in some phase of session reset.
5459 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
5461 nfs4_verifier verifier;
5462 struct nfs41_exchange_id_args args = {
5463 .verifier = &verifier,
5465 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
5467 struct nfs41_exchange_id_res res = {
5471 struct rpc_message msg = {
5472 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5478 nfs4_init_boot_verifier(clp, &verifier);
5479 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5481 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5482 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5483 args.id_len, args.id);
5485 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
5487 if (unlikely(res.server_owner == NULL)) {
5492 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
5494 if (unlikely(res.server_scope == NULL)) {
5496 goto out_server_owner;
5499 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
5500 if (unlikely(res.impl_id == NULL)) {
5502 goto out_server_scope;
5505 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5507 status = nfs4_check_cl_exchange_flags(res.flags);
5510 clp->cl_clientid = res.clientid;
5511 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5512 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5513 clp->cl_seqid = res.seqid;
5515 kfree(clp->cl_serverowner);
5516 clp->cl_serverowner = res.server_owner;
5517 res.server_owner = NULL;
5519 /* use the most recent implementation id */
5520 kfree(clp->cl_implid);
5521 clp->cl_implid = res.impl_id;
5523 if (clp->cl_serverscope != NULL &&
5524 !nfs41_same_server_scope(clp->cl_serverscope,
5525 res.server_scope)) {
5526 dprintk("%s: server_scope mismatch detected\n",
5528 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
5529 kfree(clp->cl_serverscope);
5530 clp->cl_serverscope = NULL;
5533 if (clp->cl_serverscope == NULL) {
5534 clp->cl_serverscope = res.server_scope;
5541 kfree(res.server_owner);
5543 kfree(res.server_scope);
5545 if (clp->cl_implid != NULL)
5546 dprintk("NFS reply exchange_id: Server Implementation ID: "
5547 "domain: %s, name: %s, date: %llu,%u\n",
5548 clp->cl_implid->domain, clp->cl_implid->name,
5549 clp->cl_implid->date.seconds,
5550 clp->cl_implid->date.nseconds);
5551 dprintk("NFS reply exchange_id: %d\n", status);
5555 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5556 struct rpc_cred *cred)
5558 struct rpc_message msg = {
5559 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5565 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5567 dprintk("NFS: Got error %d from the server %s on "
5568 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5572 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5573 struct rpc_cred *cred)
5578 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5579 ret = _nfs4_proc_destroy_clientid(clp, cred);
5581 case -NFS4ERR_DELAY:
5582 case -NFS4ERR_CLIENTID_BUSY:
5592 int nfs4_destroy_clientid(struct nfs_client *clp)
5594 struct rpc_cred *cred;
5597 if (clp->cl_mvops->minor_version < 1)
5599 if (clp->cl_exchange_flags == 0)
5601 if (clp->cl_preserve_clid)
5603 cred = nfs4_get_exchange_id_cred(clp);
5604 ret = nfs4_proc_destroy_clientid(clp, cred);
5609 case -NFS4ERR_STALE_CLIENTID:
5610 clp->cl_exchange_flags = 0;
5616 struct nfs4_get_lease_time_data {
5617 struct nfs4_get_lease_time_args *args;
5618 struct nfs4_get_lease_time_res *res;
5619 struct nfs_client *clp;
5622 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5625 struct nfs4_get_lease_time_data *data =
5626 (struct nfs4_get_lease_time_data *)calldata;
5628 dprintk("--> %s\n", __func__);
5629 /* just setup sequence, do not trigger session recovery
5630 since we're invoked within one */
5631 nfs41_setup_sequence(data->clp->cl_session,
5632 &data->args->la_seq_args,
5633 &data->res->lr_seq_res,
5635 dprintk("<-- %s\n", __func__);
5639 * Called from nfs4_state_manager thread for session setup, so don't recover
5640 * from sequence operation or clientid errors.
5642 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5644 struct nfs4_get_lease_time_data *data =
5645 (struct nfs4_get_lease_time_data *)calldata;
5647 dprintk("--> %s\n", __func__);
5648 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5650 switch (task->tk_status) {
5651 case -NFS4ERR_DELAY:
5652 case -NFS4ERR_GRACE:
5653 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5654 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5655 task->tk_status = 0;
5657 case -NFS4ERR_RETRY_UNCACHED_REP:
5658 rpc_restart_call_prepare(task);
5661 dprintk("<-- %s\n", __func__);
5664 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
5665 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5666 .rpc_call_done = nfs4_get_lease_time_done,
5669 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5671 struct rpc_task *task;
5672 struct nfs4_get_lease_time_args args;
5673 struct nfs4_get_lease_time_res res = {
5674 .lr_fsinfo = fsinfo,
5676 struct nfs4_get_lease_time_data data = {
5681 struct rpc_message msg = {
5682 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5686 struct rpc_task_setup task_setup = {
5687 .rpc_client = clp->cl_rpcclient,
5688 .rpc_message = &msg,
5689 .callback_ops = &nfs4_get_lease_time_ops,
5690 .callback_data = &data,
5691 .flags = RPC_TASK_TIMEOUT,
5695 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
5696 nfs4_set_sequence_privileged(&args.la_seq_args);
5697 dprintk("--> %s\n", __func__);
5698 task = rpc_run_task(&task_setup);
5701 status = PTR_ERR(task);
5703 status = task->tk_status;
5706 dprintk("<-- %s return %d\n", __func__, status);
5712 * Initialize the values to be used by the client in CREATE_SESSION
5713 * If nfs4_init_session set the fore channel request and response sizes,
5716 * Set the back channel max_resp_sz_cached to zero to force the client to
5717 * always set csa_cachethis to FALSE because the current implementation
5718 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5720 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5722 struct nfs4_session *session = args->client->cl_session;
5723 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5724 mxresp_sz = session->fc_target_max_resp_sz;
5727 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5729 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5730 /* Fore channel attributes */
5731 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5732 args->fc_attrs.max_resp_sz = mxresp_sz;
5733 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5734 args->fc_attrs.max_reqs = max_session_slots;
5736 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5737 "max_ops=%u max_reqs=%u\n",
5739 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5740 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5742 /* Back channel attributes */
5743 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5744 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5745 args->bc_attrs.max_resp_sz_cached = 0;
5746 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5747 args->bc_attrs.max_reqs = 1;
5749 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5750 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5752 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5753 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5754 args->bc_attrs.max_reqs);
5757 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5759 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5760 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5762 if (rcvd->max_resp_sz > sent->max_resp_sz)
5765 * Our requested max_ops is the minimum we need; we're not
5766 * prepared to break up compounds into smaller pieces than that.
5767 * So, no point even trying to continue if the server won't
5770 if (rcvd->max_ops < sent->max_ops)
5772 if (rcvd->max_reqs == 0)
5774 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5775 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
5779 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5781 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5782 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5784 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5786 if (rcvd->max_resp_sz < sent->max_resp_sz)
5788 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5790 /* These would render the backchannel useless: */
5791 if (rcvd->max_ops != sent->max_ops)
5793 if (rcvd->max_reqs != sent->max_reqs)
5798 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5799 struct nfs4_session *session)
5803 ret = nfs4_verify_fore_channel_attrs(args, session);
5806 return nfs4_verify_back_channel_attrs(args, session);
5809 static int _nfs4_proc_create_session(struct nfs_client *clp,
5810 struct rpc_cred *cred)
5812 struct nfs4_session *session = clp->cl_session;
5813 struct nfs41_create_session_args args = {
5815 .cb_program = NFS4_CALLBACK,
5817 struct nfs41_create_session_res res = {
5820 struct rpc_message msg = {
5821 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5828 nfs4_init_channel_attrs(&args);
5829 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5831 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5834 /* Verify the session's negotiated channel_attrs values */
5835 status = nfs4_verify_channel_attrs(&args, session);
5836 /* Increment the clientid slot sequence id */
5844 * Issues a CREATE_SESSION operation to the server.
5845 * It is the responsibility of the caller to verify the session is
5846 * expired before calling this routine.
5848 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
5852 struct nfs4_session *session = clp->cl_session;
5854 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5856 status = _nfs4_proc_create_session(clp, cred);
5860 /* Init or reset the session slot tables */
5861 status = nfs4_setup_session_slot_tables(session);
5862 dprintk("slot table setup returned %d\n", status);
5866 ptr = (unsigned *)&session->sess_id.data[0];
5867 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5868 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5870 dprintk("<-- %s\n", __func__);
5875 * Issue the over-the-wire RPC DESTROY_SESSION.
5876 * The caller must serialize access to this routine.
5878 int nfs4_proc_destroy_session(struct nfs4_session *session,
5879 struct rpc_cred *cred)
5881 struct rpc_message msg = {
5882 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5883 .rpc_argp = session,
5888 dprintk("--> nfs4_proc_destroy_session\n");
5890 /* session is still being setup */
5891 if (session->clp->cl_cons_state != NFS_CS_READY)
5894 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5897 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
5898 "Session has been destroyed regardless...\n", status);
5900 dprintk("<-- nfs4_proc_destroy_session\n");
5905 * Renew the cl_session lease.
5907 struct nfs4_sequence_data {
5908 struct nfs_client *clp;
5909 struct nfs4_sequence_args args;
5910 struct nfs4_sequence_res res;
5913 static void nfs41_sequence_release(void *data)
5915 struct nfs4_sequence_data *calldata = data;
5916 struct nfs_client *clp = calldata->clp;
5918 if (atomic_read(&clp->cl_count) > 1)
5919 nfs4_schedule_state_renewal(clp);
5920 nfs_put_client(clp);
5924 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5926 switch(task->tk_status) {
5927 case -NFS4ERR_DELAY:
5928 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5931 nfs4_schedule_lease_recovery(clp);
5936 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5938 struct nfs4_sequence_data *calldata = data;
5939 struct nfs_client *clp = calldata->clp;
5941 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5944 if (task->tk_status < 0) {
5945 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5946 if (atomic_read(&clp->cl_count) == 1)
5949 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5950 rpc_restart_call_prepare(task);
5954 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5956 dprintk("<-- %s\n", __func__);
5959 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5961 struct nfs4_sequence_data *calldata = data;
5962 struct nfs_client *clp = calldata->clp;
5963 struct nfs4_sequence_args *args;
5964 struct nfs4_sequence_res *res;
5966 args = task->tk_msg.rpc_argp;
5967 res = task->tk_msg.rpc_resp;
5969 nfs41_setup_sequence(clp->cl_session, args, res, task);
5972 static const struct rpc_call_ops nfs41_sequence_ops = {
5973 .rpc_call_done = nfs41_sequence_call_done,
5974 .rpc_call_prepare = nfs41_sequence_prepare,
5975 .rpc_release = nfs41_sequence_release,
5978 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
5979 struct rpc_cred *cred,
5982 struct nfs4_sequence_data *calldata;
5983 struct rpc_message msg = {
5984 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5987 struct rpc_task_setup task_setup_data = {
5988 .rpc_client = clp->cl_rpcclient,
5989 .rpc_message = &msg,
5990 .callback_ops = &nfs41_sequence_ops,
5991 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
5994 if (!atomic_inc_not_zero(&clp->cl_count))
5995 return ERR_PTR(-EIO);
5996 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5997 if (calldata == NULL) {
5998 nfs_put_client(clp);
5999 return ERR_PTR(-ENOMEM);
6001 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
6003 nfs4_set_sequence_privileged(&calldata->args);
6004 msg.rpc_argp = &calldata->args;
6005 msg.rpc_resp = &calldata->res;
6006 calldata->clp = clp;
6007 task_setup_data.callback_data = calldata;
6009 return rpc_run_task(&task_setup_data);
6012 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
6014 struct rpc_task *task;
6017 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6019 task = _nfs41_proc_sequence(clp, cred, false);
6021 ret = PTR_ERR(task);
6023 rpc_put_task_async(task);
6024 dprintk("<-- %s status=%d\n", __func__, ret);
6028 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6030 struct rpc_task *task;
6033 task = _nfs41_proc_sequence(clp, cred, true);
6035 ret = PTR_ERR(task);
6038 ret = rpc_wait_for_completion_task(task);
6040 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6042 if (task->tk_status == 0)
6043 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
6044 ret = task->tk_status;
6048 dprintk("<-- %s status=%d\n", __func__, ret);
6052 struct nfs4_reclaim_complete_data {
6053 struct nfs_client *clp;
6054 struct nfs41_reclaim_complete_args arg;
6055 struct nfs41_reclaim_complete_res res;
6058 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6060 struct nfs4_reclaim_complete_data *calldata = data;
6062 nfs41_setup_sequence(calldata->clp->cl_session,
6063 &calldata->arg.seq_args,
6064 &calldata->res.seq_res,
6068 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6070 switch(task->tk_status) {
6072 case -NFS4ERR_COMPLETE_ALREADY:
6073 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6075 case -NFS4ERR_DELAY:
6076 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6078 case -NFS4ERR_RETRY_UNCACHED_REP:
6081 nfs4_schedule_lease_recovery(clp);
6086 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6088 struct nfs4_reclaim_complete_data *calldata = data;
6089 struct nfs_client *clp = calldata->clp;
6090 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6092 dprintk("--> %s\n", __func__);
6093 if (!nfs41_sequence_done(task, res))
6096 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6097 rpc_restart_call_prepare(task);
6100 dprintk("<-- %s\n", __func__);
6103 static void nfs4_free_reclaim_complete_data(void *data)
6105 struct nfs4_reclaim_complete_data *calldata = data;
6110 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6111 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6112 .rpc_call_done = nfs4_reclaim_complete_done,
6113 .rpc_release = nfs4_free_reclaim_complete_data,
6117 * Issue a global reclaim complete.
6119 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6121 struct nfs4_reclaim_complete_data *calldata;
6122 struct rpc_task *task;
6123 struct rpc_message msg = {
6124 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6126 struct rpc_task_setup task_setup_data = {
6127 .rpc_client = clp->cl_rpcclient,
6128 .rpc_message = &msg,
6129 .callback_ops = &nfs4_reclaim_complete_call_ops,
6130 .flags = RPC_TASK_ASYNC,
6132 int status = -ENOMEM;
6134 dprintk("--> %s\n", __func__);
6135 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
6136 if (calldata == NULL)
6138 calldata->clp = clp;
6139 calldata->arg.one_fs = 0;
6141 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
6142 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
6143 msg.rpc_argp = &calldata->arg;
6144 msg.rpc_resp = &calldata->res;
6145 task_setup_data.callback_data = calldata;
6146 task = rpc_run_task(&task_setup_data);
6148 status = PTR_ERR(task);
6151 status = nfs4_wait_for_completion_rpc_task(task);
6153 status = task->tk_status;
6157 dprintk("<-- %s status=%d\n", __func__, status);
6162 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6164 struct nfs4_layoutget *lgp = calldata;
6165 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6166 struct nfs4_session *session = nfs4_get_session(server);
6168 dprintk("--> %s\n", __func__);
6169 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6170 * right now covering the LAYOUTGET we are about to send.
6171 * However, that is not so catastrophic, and there seems
6172 * to be no way to prevent it completely.
6174 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
6175 &lgp->res.seq_res, task))
6177 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6178 NFS_I(lgp->args.inode)->layout,
6179 lgp->args.ctx->state)) {
6180 rpc_exit(task, NFS4_OK);
6184 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6186 struct nfs4_layoutget *lgp = calldata;
6187 struct inode *inode = lgp->args.inode;
6188 struct nfs_server *server = NFS_SERVER(inode);
6189 struct pnfs_layout_hdr *lo;
6190 struct nfs4_state *state = NULL;
6191 unsigned long timeo, giveup;
6193 dprintk("--> %s\n", __func__);
6195 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
6198 switch (task->tk_status) {
6201 case -NFS4ERR_LAYOUTTRYLATER:
6202 case -NFS4ERR_RECALLCONFLICT:
6203 timeo = rpc_get_timeout(task->tk_client);
6204 giveup = lgp->args.timestamp + timeo;
6205 if (time_after(giveup, jiffies))
6206 task->tk_status = -NFS4ERR_DELAY;
6208 case -NFS4ERR_EXPIRED:
6209 case -NFS4ERR_BAD_STATEID:
6210 spin_lock(&inode->i_lock);
6211 lo = NFS_I(inode)->layout;
6212 if (!lo || list_empty(&lo->plh_segs)) {
6213 spin_unlock(&inode->i_lock);
6214 /* If the open stateid was bad, then recover it. */
6215 state = lgp->args.ctx->state;
6219 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6220 spin_unlock(&inode->i_lock);
6221 /* Mark the bad layout state as invalid, then
6222 * retry using the open stateid. */
6223 pnfs_free_lseg_list(&head);
6226 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6227 rpc_restart_call_prepare(task);
6229 dprintk("<-- %s\n", __func__);
6232 static size_t max_response_pages(struct nfs_server *server)
6234 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6235 return nfs_page_array_len(0, max_resp_sz);
6238 static void nfs4_free_pages(struct page **pages, size_t size)
6245 for (i = 0; i < size; i++) {
6248 __free_page(pages[i]);
6253 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6255 struct page **pages;
6258 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6260 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6264 for (i = 0; i < size; i++) {
6265 pages[i] = alloc_page(gfp_flags);
6267 dprintk("%s: failed to allocate page\n", __func__);
6268 nfs4_free_pages(pages, size);
6276 static void nfs4_layoutget_release(void *calldata)
6278 struct nfs4_layoutget *lgp = calldata;
6279 struct inode *inode = lgp->args.inode;
6280 struct nfs_server *server = NFS_SERVER(inode);
6281 size_t max_pages = max_response_pages(server);
6283 dprintk("--> %s\n", __func__);
6284 nfs4_free_pages(lgp->args.layout.pages, max_pages);
6285 pnfs_put_layout_hdr(NFS_I(inode)->layout);
6286 put_nfs_open_context(lgp->args.ctx);
6288 dprintk("<-- %s\n", __func__);
6291 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6292 .rpc_call_prepare = nfs4_layoutget_prepare,
6293 .rpc_call_done = nfs4_layoutget_done,
6294 .rpc_release = nfs4_layoutget_release,
6297 struct pnfs_layout_segment *
6298 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
6300 struct inode *inode = lgp->args.inode;
6301 struct nfs_server *server = NFS_SERVER(inode);
6302 size_t max_pages = max_response_pages(server);
6303 struct rpc_task *task;
6304 struct rpc_message msg = {
6305 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6306 .rpc_argp = &lgp->args,
6307 .rpc_resp = &lgp->res,
6309 struct rpc_task_setup task_setup_data = {
6310 .rpc_client = server->client,
6311 .rpc_message = &msg,
6312 .callback_ops = &nfs4_layoutget_call_ops,
6313 .callback_data = lgp,
6314 .flags = RPC_TASK_ASYNC,
6316 struct pnfs_layout_segment *lseg = NULL;
6319 dprintk("--> %s\n", __func__);
6321 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6322 if (!lgp->args.layout.pages) {
6323 nfs4_layoutget_release(lgp);
6324 return ERR_PTR(-ENOMEM);
6326 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
6327 lgp->args.timestamp = jiffies;
6329 lgp->res.layoutp = &lgp->args.layout;
6330 lgp->res.seq_res.sr_slot = NULL;
6331 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
6333 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6334 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6336 task = rpc_run_task(&task_setup_data);
6338 return ERR_CAST(task);
6339 status = nfs4_wait_for_completion_rpc_task(task);
6341 status = task->tk_status;
6342 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6343 if (status == 0 && lgp->res.layoutp->len)
6344 lseg = pnfs_layout_process(lgp);
6346 dprintk("<-- %s status=%d\n", __func__, status);
6348 return ERR_PTR(status);
6353 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6355 struct nfs4_layoutreturn *lrp = calldata;
6357 dprintk("--> %s\n", __func__);
6358 nfs41_setup_sequence(lrp->clp->cl_session,
6359 &lrp->args.seq_args,
6364 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6366 struct nfs4_layoutreturn *lrp = calldata;
6367 struct nfs_server *server;
6369 dprintk("--> %s\n", __func__);
6371 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
6374 server = NFS_SERVER(lrp->args.inode);
6375 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6376 rpc_restart_call_prepare(task);
6379 dprintk("<-- %s\n", __func__);
6382 static void nfs4_layoutreturn_release(void *calldata)
6384 struct nfs4_layoutreturn *lrp = calldata;
6385 struct pnfs_layout_hdr *lo = lrp->args.layout;
6387 dprintk("--> %s\n", __func__);
6388 spin_lock(&lo->plh_inode->i_lock);
6389 if (lrp->res.lrs_present)
6390 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6391 lo->plh_block_lgets--;
6392 spin_unlock(&lo->plh_inode->i_lock);
6393 pnfs_put_layout_hdr(lrp->args.layout);
6395 dprintk("<-- %s\n", __func__);
6398 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6399 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6400 .rpc_call_done = nfs4_layoutreturn_done,
6401 .rpc_release = nfs4_layoutreturn_release,
6404 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6406 struct rpc_task *task;
6407 struct rpc_message msg = {
6408 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6409 .rpc_argp = &lrp->args,
6410 .rpc_resp = &lrp->res,
6412 struct rpc_task_setup task_setup_data = {
6413 .rpc_client = lrp->clp->cl_rpcclient,
6414 .rpc_message = &msg,
6415 .callback_ops = &nfs4_layoutreturn_call_ops,
6416 .callback_data = lrp,
6420 dprintk("--> %s\n", __func__);
6421 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
6422 task = rpc_run_task(&task_setup_data);
6424 return PTR_ERR(task);
6425 status = task->tk_status;
6426 dprintk("<-- %s status=%d\n", __func__, status);
6432 * Retrieve the list of Data Server devices from the MDS.
6434 static int _nfs4_getdevicelist(struct nfs_server *server,
6435 const struct nfs_fh *fh,
6436 struct pnfs_devicelist *devlist)
6438 struct nfs4_getdevicelist_args args = {
6440 .layoutclass = server->pnfs_curr_ld->id,
6442 struct nfs4_getdevicelist_res res = {
6445 struct rpc_message msg = {
6446 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6452 dprintk("--> %s\n", __func__);
6453 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6455 dprintk("<-- %s status=%d\n", __func__, status);
6459 int nfs4_proc_getdevicelist(struct nfs_server *server,
6460 const struct nfs_fh *fh,
6461 struct pnfs_devicelist *devlist)
6463 struct nfs4_exception exception = { };
6467 err = nfs4_handle_exception(server,
6468 _nfs4_getdevicelist(server, fh, devlist),
6470 } while (exception.retry);
6472 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6473 err, devlist->num_devs);
6477 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6480 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6482 struct nfs4_getdeviceinfo_args args = {
6485 struct nfs4_getdeviceinfo_res res = {
6488 struct rpc_message msg = {
6489 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6495 dprintk("--> %s\n", __func__);
6496 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6497 dprintk("<-- %s status=%d\n", __func__, status);
6502 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6504 struct nfs4_exception exception = { };
6508 err = nfs4_handle_exception(server,
6509 _nfs4_proc_getdeviceinfo(server, pdev),
6511 } while (exception.retry);
6514 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6516 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6518 struct nfs4_layoutcommit_data *data = calldata;
6519 struct nfs_server *server = NFS_SERVER(data->args.inode);
6520 struct nfs4_session *session = nfs4_get_session(server);
6522 nfs41_setup_sequence(session,
6523 &data->args.seq_args,
6529 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6531 struct nfs4_layoutcommit_data *data = calldata;
6532 struct nfs_server *server = NFS_SERVER(data->args.inode);
6534 if (!nfs41_sequence_done(task, &data->res.seq_res))
6537 switch (task->tk_status) { /* Just ignore these failures */
6538 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6539 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6540 case -NFS4ERR_BADLAYOUT: /* no layout */
6541 case -NFS4ERR_GRACE: /* loca_recalim always false */
6542 task->tk_status = 0;
6545 nfs_post_op_update_inode_force_wcc(data->args.inode,
6549 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6550 rpc_restart_call_prepare(task);
6556 static void nfs4_layoutcommit_release(void *calldata)
6558 struct nfs4_layoutcommit_data *data = calldata;
6560 pnfs_cleanup_layoutcommit(data);
6561 put_rpccred(data->cred);
6565 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6566 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6567 .rpc_call_done = nfs4_layoutcommit_done,
6568 .rpc_release = nfs4_layoutcommit_release,
6572 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
6574 struct rpc_message msg = {
6575 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6576 .rpc_argp = &data->args,
6577 .rpc_resp = &data->res,
6578 .rpc_cred = data->cred,
6580 struct rpc_task_setup task_setup_data = {
6581 .task = &data->task,
6582 .rpc_client = NFS_CLIENT(data->args.inode),
6583 .rpc_message = &msg,
6584 .callback_ops = &nfs4_layoutcommit_ops,
6585 .callback_data = data,
6586 .flags = RPC_TASK_ASYNC,
6588 struct rpc_task *task;
6591 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6592 "lbw: %llu inode %lu\n",
6593 data->task.tk_pid, sync,
6594 data->args.lastbytewritten,
6595 data->args.inode->i_ino);
6597 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
6598 task = rpc_run_task(&task_setup_data);
6600 return PTR_ERR(task);
6603 status = nfs4_wait_for_completion_rpc_task(task);
6606 status = task->tk_status;
6608 dprintk("%s: status %d\n", __func__, status);
6614 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6615 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6617 struct nfs41_secinfo_no_name_args args = {
6618 .style = SECINFO_STYLE_CURRENT_FH,
6620 struct nfs4_secinfo_res res = {
6623 struct rpc_message msg = {
6624 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6628 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6632 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6633 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6635 struct nfs4_exception exception = { };
6638 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6641 case -NFS4ERR_WRONGSEC:
6642 case -NFS4ERR_NOTSUPP:
6645 err = nfs4_handle_exception(server, err, &exception);
6647 } while (exception.retry);
6653 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6654 struct nfs_fsinfo *info)
6658 rpc_authflavor_t flavor;
6659 struct nfs4_secinfo_flavors *flavors;
6661 page = alloc_page(GFP_KERNEL);
6667 flavors = page_address(page);
6668 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6671 * Fall back on "guess and check" method if
6672 * the server doesn't support SECINFO_NO_NAME
6674 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6675 err = nfs4_find_root_sec(server, fhandle, info);
6681 flavor = nfs_find_best_sec(flavors);
6683 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6693 static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6696 struct nfs41_test_stateid_args args = {
6699 struct nfs41_test_stateid_res res;
6700 struct rpc_message msg = {
6701 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6706 dprintk("NFS call test_stateid %p\n", stateid);
6707 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6708 nfs4_set_sequence_privileged(&args.seq_args);
6709 status = nfs4_call_sync_sequence(server->client, server, &msg,
6710 &args.seq_args, &res.seq_res);
6711 if (status != NFS_OK) {
6712 dprintk("NFS reply test_stateid: failed, %d\n", status);
6715 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
6720 * nfs41_test_stateid - perform a TEST_STATEID operation
6722 * @server: server / transport on which to perform the operation
6723 * @stateid: state ID to test
6725 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6726 * Otherwise a negative NFS4ERR value is returned if the operation
6727 * failed or the state ID is not currently valid.
6729 static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6731 struct nfs4_exception exception = { };
6734 err = _nfs41_test_stateid(server, stateid);
6735 if (err != -NFS4ERR_DELAY)
6737 nfs4_handle_exception(server, err, &exception);
6738 } while (exception.retry);
6742 static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6744 struct nfs41_free_stateid_args args = {
6747 struct nfs41_free_stateid_res res;
6748 struct rpc_message msg = {
6749 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6755 dprintk("NFS call free_stateid %p\n", stateid);
6756 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6757 nfs4_set_sequence_privileged(&args.seq_args);
6758 status = nfs4_call_sync_sequence(server->client, server, &msg,
6759 &args.seq_args, &res.seq_res);
6760 dprintk("NFS reply free_stateid: %d\n", status);
6765 * nfs41_free_stateid - perform a FREE_STATEID operation
6767 * @server: server / transport on which to perform the operation
6768 * @stateid: state ID to release
6770 * Returns NFS_OK if the server freed "stateid". Otherwise a
6771 * negative NFS4ERR value is returned.
6773 static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6775 struct nfs4_exception exception = { };
6778 err = _nfs4_free_stateid(server, stateid);
6779 if (err != -NFS4ERR_DELAY)
6781 nfs4_handle_exception(server, err, &exception);
6782 } while (exception.retry);
6786 static bool nfs41_match_stateid(const nfs4_stateid *s1,
6787 const nfs4_stateid *s2)
6789 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
6792 if (s1->seqid == s2->seqid)
6794 if (s1->seqid == 0 || s2->seqid == 0)
6800 #endif /* CONFIG_NFS_V4_1 */
6802 static bool nfs4_match_stateid(const nfs4_stateid *s1,
6803 const nfs4_stateid *s2)
6805 return nfs4_stateid_match(s1, s2);
6809 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
6810 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6811 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6812 .recover_open = nfs4_open_reclaim,
6813 .recover_lock = nfs4_lock_reclaim,
6814 .establish_clid = nfs4_init_clientid,
6815 .get_clid_cred = nfs4_get_setclientid_cred,
6816 .detect_trunking = nfs40_discover_server_trunking,
6819 #if defined(CONFIG_NFS_V4_1)
6820 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6821 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6822 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6823 .recover_open = nfs4_open_reclaim,
6824 .recover_lock = nfs4_lock_reclaim,
6825 .establish_clid = nfs41_init_clientid,
6826 .get_clid_cred = nfs4_get_exchange_id_cred,
6827 .reclaim_complete = nfs41_proc_reclaim_complete,
6828 .detect_trunking = nfs41_discover_server_trunking,
6830 #endif /* CONFIG_NFS_V4_1 */
6832 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6833 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6834 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6835 .recover_open = nfs4_open_expired,
6836 .recover_lock = nfs4_lock_expired,
6837 .establish_clid = nfs4_init_clientid,
6838 .get_clid_cred = nfs4_get_setclientid_cred,
6841 #if defined(CONFIG_NFS_V4_1)
6842 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
6843 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6844 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6845 .recover_open = nfs41_open_expired,
6846 .recover_lock = nfs41_lock_expired,
6847 .establish_clid = nfs41_init_clientid,
6848 .get_clid_cred = nfs4_get_exchange_id_cred,
6850 #endif /* CONFIG_NFS_V4_1 */
6852 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
6853 .sched_state_renewal = nfs4_proc_async_renew,
6854 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
6855 .renew_lease = nfs4_proc_renew,
6858 #if defined(CONFIG_NFS_V4_1)
6859 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
6860 .sched_state_renewal = nfs41_proc_async_sequence,
6861 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
6862 .renew_lease = nfs4_proc_sequence,
6866 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6868 .init_caps = NFS_CAP_READDIRPLUS
6869 | NFS_CAP_ATOMIC_OPEN
6870 | NFS_CAP_CHANGE_ATTR
6871 | NFS_CAP_POSIX_LOCK,
6872 .call_sync = _nfs4_call_sync,
6873 .match_stateid = nfs4_match_stateid,
6874 .find_root_sec = nfs4_find_root_sec,
6875 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6876 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6877 .state_renewal_ops = &nfs40_state_renewal_ops,
6880 #if defined(CONFIG_NFS_V4_1)
6881 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6883 .init_caps = NFS_CAP_READDIRPLUS
6884 | NFS_CAP_ATOMIC_OPEN
6885 | NFS_CAP_CHANGE_ATTR
6886 | NFS_CAP_POSIX_LOCK
6887 | NFS_CAP_STATEID_NFSV41
6888 | NFS_CAP_ATOMIC_OPEN_V1,
6889 .call_sync = nfs4_call_sync_sequence,
6890 .match_stateid = nfs41_match_stateid,
6891 .find_root_sec = nfs41_find_root_sec,
6892 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6893 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6894 .state_renewal_ops = &nfs41_state_renewal_ops,
6898 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6899 [0] = &nfs_v4_0_minor_ops,
6900 #if defined(CONFIG_NFS_V4_1)
6901 [1] = &nfs_v4_1_minor_ops,
6905 const struct inode_operations nfs4_dir_inode_operations = {
6906 .create = nfs_create,
6907 .lookup = nfs_lookup,
6908 .atomic_open = nfs_atomic_open,
6910 .unlink = nfs_unlink,
6911 .symlink = nfs_symlink,
6915 .rename = nfs_rename,
6916 .permission = nfs_permission,
6917 .getattr = nfs_getattr,
6918 .setattr = nfs_setattr,
6919 .getxattr = generic_getxattr,
6920 .setxattr = generic_setxattr,
6921 .listxattr = generic_listxattr,
6922 .removexattr = generic_removexattr,
6925 static const struct inode_operations nfs4_file_inode_operations = {
6926 .permission = nfs_permission,
6927 .getattr = nfs_getattr,
6928 .setattr = nfs_setattr,
6929 .getxattr = generic_getxattr,
6930 .setxattr = generic_setxattr,
6931 .listxattr = generic_listxattr,
6932 .removexattr = generic_removexattr,
6935 const struct nfs_rpc_ops nfs_v4_clientops = {
6936 .version = 4, /* protocol version */
6937 .dentry_ops = &nfs4_dentry_operations,
6938 .dir_inode_ops = &nfs4_dir_inode_operations,
6939 .file_inode_ops = &nfs4_file_inode_operations,
6940 .file_ops = &nfs4_file_operations,
6941 .getroot = nfs4_proc_get_root,
6942 .submount = nfs4_submount,
6943 .try_mount = nfs4_try_mount,
6944 .getattr = nfs4_proc_getattr,
6945 .setattr = nfs4_proc_setattr,
6946 .lookup = nfs4_proc_lookup,
6947 .access = nfs4_proc_access,
6948 .readlink = nfs4_proc_readlink,
6949 .create = nfs4_proc_create,
6950 .remove = nfs4_proc_remove,
6951 .unlink_setup = nfs4_proc_unlink_setup,
6952 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
6953 .unlink_done = nfs4_proc_unlink_done,
6954 .rename = nfs4_proc_rename,
6955 .rename_setup = nfs4_proc_rename_setup,
6956 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
6957 .rename_done = nfs4_proc_rename_done,
6958 .link = nfs4_proc_link,
6959 .symlink = nfs4_proc_symlink,
6960 .mkdir = nfs4_proc_mkdir,
6961 .rmdir = nfs4_proc_remove,
6962 .readdir = nfs4_proc_readdir,
6963 .mknod = nfs4_proc_mknod,
6964 .statfs = nfs4_proc_statfs,
6965 .fsinfo = nfs4_proc_fsinfo,
6966 .pathconf = nfs4_proc_pathconf,
6967 .set_capabilities = nfs4_server_capabilities,
6968 .decode_dirent = nfs4_decode_dirent,
6969 .read_setup = nfs4_proc_read_setup,
6970 .read_pageio_init = pnfs_pageio_init_read,
6971 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
6972 .read_done = nfs4_read_done,
6973 .write_setup = nfs4_proc_write_setup,
6974 .write_pageio_init = pnfs_pageio_init_write,
6975 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
6976 .write_done = nfs4_write_done,
6977 .commit_setup = nfs4_proc_commit_setup,
6978 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
6979 .commit_done = nfs4_commit_done,
6980 .lock = nfs4_proc_lock,
6981 .clear_acl_cache = nfs4_zap_acl_attr,
6982 .close_context = nfs4_close_context,
6983 .open_context = nfs4_atomic_open,
6984 .have_delegation = nfs4_have_delegation,
6985 .return_delegation = nfs4_inode_return_delegation,
6986 .alloc_client = nfs4_alloc_client,
6987 .init_client = nfs4_init_client,
6988 .free_client = nfs4_free_client,
6989 .create_server = nfs4_create_server,
6990 .clone_server = nfs_clone_server,
6993 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6994 .prefix = XATTR_NAME_NFSV4_ACL,
6995 .list = nfs4_xattr_list_nfs4_acl,
6996 .get = nfs4_xattr_get_nfs4_acl,
6997 .set = nfs4_xattr_set_nfs4_acl,
7000 const struct xattr_handler *nfs4_xattr_handlers[] = {
7001 &nfs4_xattr_nfs4_acl_handler,