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_SLOT_TBL_DRAINING, &tbl->slot_tbl_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;
772 unsigned int is_recover : 1;
777 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
778 int err, struct nfs4_exception *exception)
782 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
784 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
785 exception->retry = 1;
789 static enum open_claim_type4
790 nfs4_map_atomic_open_claim(struct nfs_server *server,
791 enum open_claim_type4 claim)
793 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
798 case NFS4_OPEN_CLAIM_FH:
799 return NFS4_OPEN_CLAIM_NULL;
800 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
801 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
802 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
803 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
807 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
809 p->o_res.f_attr = &p->f_attr;
810 p->o_res.seqid = p->o_arg.seqid;
811 p->c_res.seqid = p->c_arg.seqid;
812 p->o_res.server = p->o_arg.server;
813 p->o_res.access_request = p->o_arg.access;
814 nfs_fattr_init(&p->f_attr);
815 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
818 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
819 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
820 const struct iattr *attrs,
821 enum open_claim_type4 claim,
824 struct dentry *parent = dget_parent(dentry);
825 struct inode *dir = parent->d_inode;
826 struct nfs_server *server = NFS_SERVER(dir);
827 struct nfs4_opendata *p;
829 p = kzalloc(sizeof(*p), gfp_mask);
832 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
833 if (p->o_arg.seqid == NULL)
835 nfs_sb_active(dentry->d_sb);
836 p->dentry = dget(dentry);
839 atomic_inc(&sp->so_count);
840 p->o_arg.open_flags = flags;
841 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
842 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
843 * will return permission denied for all bits until close */
844 if (!(flags & O_EXCL)) {
845 /* ask server to check for all possible rights as results
847 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
848 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
850 p->o_arg.clientid = server->nfs_client->cl_clientid;
851 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
852 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
853 p->o_arg.name = &dentry->d_name;
854 p->o_arg.server = server;
855 p->o_arg.bitmask = server->attr_bitmask;
856 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
857 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
858 switch (p->o_arg.claim) {
859 case NFS4_OPEN_CLAIM_NULL:
860 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
861 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
862 p->o_arg.fh = NFS_FH(dir);
864 case NFS4_OPEN_CLAIM_PREVIOUS:
865 case NFS4_OPEN_CLAIM_FH:
866 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
867 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
868 p->o_arg.fh = NFS_FH(dentry->d_inode);
870 if (attrs != NULL && attrs->ia_valid != 0) {
873 p->o_arg.u.attrs = &p->attrs;
874 memcpy(&p->attrs, attrs, sizeof(p->attrs));
877 verf[1] = current->pid;
878 memcpy(p->o_arg.u.verifier.data, verf,
879 sizeof(p->o_arg.u.verifier.data));
881 p->c_arg.fh = &p->o_res.fh;
882 p->c_arg.stateid = &p->o_res.stateid;
883 p->c_arg.seqid = p->o_arg.seqid;
884 nfs4_init_opendata_res(p);
894 static void nfs4_opendata_free(struct kref *kref)
896 struct nfs4_opendata *p = container_of(kref,
897 struct nfs4_opendata, kref);
898 struct super_block *sb = p->dentry->d_sb;
900 nfs_free_seqid(p->o_arg.seqid);
901 if (p->state != NULL)
902 nfs4_put_open_state(p->state);
903 nfs4_put_state_owner(p->owner);
907 nfs_fattr_free_names(&p->f_attr);
911 static void nfs4_opendata_put(struct nfs4_opendata *p)
914 kref_put(&p->kref, nfs4_opendata_free);
917 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
921 ret = rpc_wait_for_completion_task(task);
925 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
929 if (open_mode & (O_EXCL|O_TRUNC))
931 switch (mode & (FMODE_READ|FMODE_WRITE)) {
933 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
934 && state->n_rdonly != 0;
937 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
938 && state->n_wronly != 0;
940 case FMODE_READ|FMODE_WRITE:
941 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
942 && state->n_rdwr != 0;
948 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
950 if (delegation == NULL)
952 if ((delegation->type & fmode) != fmode)
954 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
956 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
958 nfs_mark_delegation_referenced(delegation);
962 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
971 case FMODE_READ|FMODE_WRITE:
974 nfs4_state_set_mode_locked(state, state->state | fmode);
977 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
979 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
980 nfs4_stateid_copy(&state->stateid, stateid);
981 nfs4_stateid_copy(&state->open_stateid, stateid);
982 set_bit(NFS_OPEN_STATE, &state->flags);
985 set_bit(NFS_O_RDONLY_STATE, &state->flags);
988 set_bit(NFS_O_WRONLY_STATE, &state->flags);
990 case FMODE_READ|FMODE_WRITE:
991 set_bit(NFS_O_RDWR_STATE, &state->flags);
995 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
997 write_seqlock(&state->seqlock);
998 nfs_set_open_stateid_locked(state, stateid, fmode);
999 write_sequnlock(&state->seqlock);
1002 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1005 * Protect the call to nfs4_state_set_mode_locked and
1006 * serialise the stateid update
1008 write_seqlock(&state->seqlock);
1009 if (deleg_stateid != NULL) {
1010 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1011 set_bit(NFS_DELEGATED_STATE, &state->flags);
1013 if (open_stateid != NULL)
1014 nfs_set_open_stateid_locked(state, open_stateid, fmode);
1015 write_sequnlock(&state->seqlock);
1016 spin_lock(&state->owner->so_lock);
1017 update_open_stateflags(state, fmode);
1018 spin_unlock(&state->owner->so_lock);
1021 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
1023 struct nfs_inode *nfsi = NFS_I(state->inode);
1024 struct nfs_delegation *deleg_cur;
1027 fmode &= (FMODE_READ|FMODE_WRITE);
1030 deleg_cur = rcu_dereference(nfsi->delegation);
1031 if (deleg_cur == NULL)
1034 spin_lock(&deleg_cur->lock);
1035 if (nfsi->delegation != deleg_cur ||
1036 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
1037 (deleg_cur->type & fmode) != fmode)
1038 goto no_delegation_unlock;
1040 if (delegation == NULL)
1041 delegation = &deleg_cur->stateid;
1042 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1043 goto no_delegation_unlock;
1045 nfs_mark_delegation_referenced(deleg_cur);
1046 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1048 no_delegation_unlock:
1049 spin_unlock(&deleg_cur->lock);
1053 if (!ret && open_stateid != NULL) {
1054 __update_open_stateid(state, open_stateid, NULL, fmode);
1062 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1064 struct nfs_delegation *delegation;
1067 delegation = rcu_dereference(NFS_I(inode)->delegation);
1068 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1073 nfs4_inode_return_delegation(inode);
1076 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1078 struct nfs4_state *state = opendata->state;
1079 struct nfs_inode *nfsi = NFS_I(state->inode);
1080 struct nfs_delegation *delegation;
1081 int open_mode = opendata->o_arg.open_flags;
1082 fmode_t fmode = opendata->o_arg.fmode;
1083 nfs4_stateid stateid;
1087 if (can_open_cached(state, fmode, open_mode)) {
1088 spin_lock(&state->owner->so_lock);
1089 if (can_open_cached(state, fmode, open_mode)) {
1090 update_open_stateflags(state, fmode);
1091 spin_unlock(&state->owner->so_lock);
1092 goto out_return_state;
1094 spin_unlock(&state->owner->so_lock);
1097 delegation = rcu_dereference(nfsi->delegation);
1098 if (!can_open_delegated(delegation, fmode)) {
1102 /* Save the delegation */
1103 nfs4_stateid_copy(&stateid, &delegation->stateid);
1105 nfs_release_seqid(opendata->o_arg.seqid);
1106 if (!opendata->is_recover) {
1107 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1113 /* Try to update the stateid using the delegation */
1114 if (update_open_stateid(state, NULL, &stateid, fmode))
1115 goto out_return_state;
1118 return ERR_PTR(ret);
1120 atomic_inc(&state->count);
1125 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1127 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1128 struct nfs_delegation *delegation;
1129 int delegation_flags = 0;
1132 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1134 delegation_flags = delegation->flags;
1136 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1137 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1138 "returning a delegation for "
1139 "OPEN(CLAIM_DELEGATE_CUR)\n",
1141 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1142 nfs_inode_set_delegation(state->inode,
1143 data->owner->so_cred,
1146 nfs_inode_reclaim_delegation(state->inode,
1147 data->owner->so_cred,
1152 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1153 * and update the nfs4_state.
1155 static struct nfs4_state *
1156 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1158 struct inode *inode = data->state->inode;
1159 struct nfs4_state *state = data->state;
1162 if (!data->rpc_done) {
1163 if (data->rpc_status) {
1164 ret = data->rpc_status;
1167 /* cached opens have already been processed */
1171 ret = nfs_refresh_inode(inode, &data->f_attr);
1175 if (data->o_res.delegation_type != 0)
1176 nfs4_opendata_check_deleg(data, state);
1178 update_open_stateid(state, &data->o_res.stateid, NULL,
1180 atomic_inc(&state->count);
1184 return ERR_PTR(ret);
1188 static struct nfs4_state *
1189 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1191 struct inode *inode;
1192 struct nfs4_state *state = NULL;
1195 if (!data->rpc_done) {
1196 state = nfs4_try_open_cached(data);
1201 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1203 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1204 ret = PTR_ERR(inode);
1208 state = nfs4_get_open_state(inode, data->owner);
1211 if (data->o_res.delegation_type != 0)
1212 nfs4_opendata_check_deleg(data, state);
1213 update_open_stateid(state, &data->o_res.stateid, NULL,
1217 nfs_release_seqid(data->o_arg.seqid);
1222 return ERR_PTR(ret);
1225 static struct nfs4_state *
1226 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1228 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1229 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1230 return _nfs4_opendata_to_nfs4_state(data);
1233 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1235 struct nfs_inode *nfsi = NFS_I(state->inode);
1236 struct nfs_open_context *ctx;
1238 spin_lock(&state->inode->i_lock);
1239 list_for_each_entry(ctx, &nfsi->open_files, list) {
1240 if (ctx->state != state)
1242 get_nfs_open_context(ctx);
1243 spin_unlock(&state->inode->i_lock);
1246 spin_unlock(&state->inode->i_lock);
1247 return ERR_PTR(-ENOENT);
1250 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1251 struct nfs4_state *state, enum open_claim_type4 claim)
1253 struct nfs4_opendata *opendata;
1255 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1256 NULL, claim, GFP_NOFS);
1257 if (opendata == NULL)
1258 return ERR_PTR(-ENOMEM);
1259 opendata->state = state;
1260 atomic_inc(&state->count);
1264 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1266 struct nfs4_state *newstate;
1269 opendata->o_arg.open_flags = 0;
1270 opendata->o_arg.fmode = fmode;
1271 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1272 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1273 nfs4_init_opendata_res(opendata);
1274 ret = _nfs4_recover_proc_open(opendata);
1277 newstate = nfs4_opendata_to_nfs4_state(opendata);
1278 if (IS_ERR(newstate))
1279 return PTR_ERR(newstate);
1280 nfs4_close_state(newstate, fmode);
1285 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1287 struct nfs4_state *newstate;
1290 /* memory barrier prior to reading state->n_* */
1291 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1292 clear_bit(NFS_OPEN_STATE, &state->flags);
1294 if (state->n_rdwr != 0) {
1295 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1296 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1299 if (newstate != state)
1302 if (state->n_wronly != 0) {
1303 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1304 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1307 if (newstate != state)
1310 if (state->n_rdonly != 0) {
1311 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1312 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1315 if (newstate != state)
1319 * We may have performed cached opens for all three recoveries.
1320 * Check if we need to update the current stateid.
1322 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1323 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1324 write_seqlock(&state->seqlock);
1325 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1326 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1327 write_sequnlock(&state->seqlock);
1334 * reclaim state on the server after a reboot.
1336 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1338 struct nfs_delegation *delegation;
1339 struct nfs4_opendata *opendata;
1340 fmode_t delegation_type = 0;
1343 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1344 NFS4_OPEN_CLAIM_PREVIOUS);
1345 if (IS_ERR(opendata))
1346 return PTR_ERR(opendata);
1348 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1349 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1350 delegation_type = delegation->type;
1352 opendata->o_arg.u.delegation_type = delegation_type;
1353 status = nfs4_open_recover(opendata, state);
1354 nfs4_opendata_put(opendata);
1358 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1360 struct nfs_server *server = NFS_SERVER(state->inode);
1361 struct nfs4_exception exception = { };
1364 err = _nfs4_do_open_reclaim(ctx, state);
1365 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1367 if (err != -NFS4ERR_DELAY)
1369 nfs4_handle_exception(server, err, &exception);
1370 } while (exception.retry);
1374 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1376 struct nfs_open_context *ctx;
1379 ctx = nfs4_state_find_open_context(state);
1382 ret = nfs4_do_open_reclaim(ctx, state);
1383 put_nfs_open_context(ctx);
1387 static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1391 printk(KERN_ERR "NFS: %s: unhandled error "
1392 "%d.\n", __func__, err);
1397 case -NFS4ERR_BADSESSION:
1398 case -NFS4ERR_BADSLOT:
1399 case -NFS4ERR_BAD_HIGH_SLOT:
1400 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1401 case -NFS4ERR_DEADSESSION:
1402 set_bit(NFS_DELEGATED_STATE, &state->flags);
1403 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1405 case -NFS4ERR_STALE_CLIENTID:
1406 case -NFS4ERR_STALE_STATEID:
1407 set_bit(NFS_DELEGATED_STATE, &state->flags);
1408 case -NFS4ERR_EXPIRED:
1409 /* Don't recall a delegation if it was lost */
1410 nfs4_schedule_lease_recovery(server->nfs_client);
1412 case -NFS4ERR_DELEG_REVOKED:
1413 case -NFS4ERR_ADMIN_REVOKED:
1414 case -NFS4ERR_BAD_STATEID:
1415 case -NFS4ERR_OPENMODE:
1416 nfs_inode_find_state_and_recover(state->inode,
1418 nfs4_schedule_stateid_recovery(server, state);
1420 case -NFS4ERR_DELAY:
1421 case -NFS4ERR_GRACE:
1422 set_bit(NFS_DELEGATED_STATE, &state->flags);
1426 case -NFS4ERR_DENIED:
1427 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1433 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1435 struct nfs_server *server = NFS_SERVER(state->inode);
1436 struct nfs4_opendata *opendata;
1439 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1440 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1441 if (IS_ERR(opendata))
1442 return PTR_ERR(opendata);
1443 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1444 err = nfs4_open_recover(opendata, state);
1445 nfs4_opendata_put(opendata);
1446 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1449 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1451 struct nfs4_opendata *data = calldata;
1453 data->rpc_status = task->tk_status;
1454 if (data->rpc_status == 0) {
1455 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1456 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1457 renew_lease(data->o_res.server, data->timestamp);
1462 static void nfs4_open_confirm_release(void *calldata)
1464 struct nfs4_opendata *data = calldata;
1465 struct nfs4_state *state = NULL;
1467 /* If this request hasn't been cancelled, do nothing */
1468 if (data->cancelled == 0)
1470 /* In case of error, no cleanup! */
1471 if (!data->rpc_done)
1473 state = nfs4_opendata_to_nfs4_state(data);
1475 nfs4_close_state(state, data->o_arg.fmode);
1477 nfs4_opendata_put(data);
1480 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1481 .rpc_call_done = nfs4_open_confirm_done,
1482 .rpc_release = nfs4_open_confirm_release,
1486 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1488 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1490 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1491 struct rpc_task *task;
1492 struct rpc_message msg = {
1493 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1494 .rpc_argp = &data->c_arg,
1495 .rpc_resp = &data->c_res,
1496 .rpc_cred = data->owner->so_cred,
1498 struct rpc_task_setup task_setup_data = {
1499 .rpc_client = server->client,
1500 .rpc_message = &msg,
1501 .callback_ops = &nfs4_open_confirm_ops,
1502 .callback_data = data,
1503 .workqueue = nfsiod_workqueue,
1504 .flags = RPC_TASK_ASYNC,
1508 kref_get(&data->kref);
1510 data->rpc_status = 0;
1511 data->timestamp = jiffies;
1512 task = rpc_run_task(&task_setup_data);
1514 return PTR_ERR(task);
1515 status = nfs4_wait_for_completion_rpc_task(task);
1517 data->cancelled = 1;
1520 status = data->rpc_status;
1525 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1527 struct nfs4_opendata *data = calldata;
1528 struct nfs4_state_owner *sp = data->owner;
1529 struct nfs_client *clp = sp->so_server->nfs_client;
1531 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1534 * Check if we still need to send an OPEN call, or if we can use
1535 * a delegation instead.
1537 if (data->state != NULL) {
1538 struct nfs_delegation *delegation;
1540 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1543 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1544 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1545 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
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 switch (data->o_arg.claim) {
1553 case NFS4_OPEN_CLAIM_PREVIOUS:
1554 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1555 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1556 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
1557 case NFS4_OPEN_CLAIM_FH:
1558 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1559 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1561 data->timestamp = jiffies;
1562 if (nfs4_setup_sequence(data->o_arg.server,
1563 &data->o_arg.seq_args,
1564 &data->o_res.seq_res,
1566 nfs_release_seqid(data->o_arg.seqid);
1568 /* Set the create mode (note dependency on the session type) */
1569 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1570 if (data->o_arg.open_flags & O_EXCL) {
1571 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1572 if (nfs4_has_persistent_session(clp))
1573 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1574 else if (clp->cl_mvops->minor_version > 0)
1575 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1581 task->tk_action = NULL;
1583 nfs4_sequence_done(task, &data->o_res.seq_res);
1586 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1588 struct nfs4_opendata *data = calldata;
1590 data->rpc_status = task->tk_status;
1592 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1595 if (task->tk_status == 0) {
1596 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1597 switch (data->o_res.f_attr->mode & S_IFMT) {
1601 data->rpc_status = -ELOOP;
1604 data->rpc_status = -EISDIR;
1607 data->rpc_status = -ENOTDIR;
1610 renew_lease(data->o_res.server, data->timestamp);
1611 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1612 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1617 static void nfs4_open_release(void *calldata)
1619 struct nfs4_opendata *data = calldata;
1620 struct nfs4_state *state = NULL;
1622 /* If this request hasn't been cancelled, do nothing */
1623 if (data->cancelled == 0)
1625 /* In case of error, no cleanup! */
1626 if (data->rpc_status != 0 || !data->rpc_done)
1628 /* In case we need an open_confirm, no cleanup! */
1629 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1631 state = nfs4_opendata_to_nfs4_state(data);
1633 nfs4_close_state(state, data->o_arg.fmode);
1635 nfs4_opendata_put(data);
1638 static const struct rpc_call_ops nfs4_open_ops = {
1639 .rpc_call_prepare = nfs4_open_prepare,
1640 .rpc_call_done = nfs4_open_done,
1641 .rpc_release = nfs4_open_release,
1644 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1646 struct inode *dir = data->dir->d_inode;
1647 struct nfs_server *server = NFS_SERVER(dir);
1648 struct nfs_openargs *o_arg = &data->o_arg;
1649 struct nfs_openres *o_res = &data->o_res;
1650 struct rpc_task *task;
1651 struct rpc_message msg = {
1652 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1655 .rpc_cred = data->owner->so_cred,
1657 struct rpc_task_setup task_setup_data = {
1658 .rpc_client = server->client,
1659 .rpc_message = &msg,
1660 .callback_ops = &nfs4_open_ops,
1661 .callback_data = data,
1662 .workqueue = nfsiod_workqueue,
1663 .flags = RPC_TASK_ASYNC,
1667 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1668 kref_get(&data->kref);
1670 data->rpc_status = 0;
1671 data->cancelled = 0;
1672 data->is_recover = 0;
1674 nfs4_set_sequence_privileged(&o_arg->seq_args);
1675 data->is_recover = 1;
1677 task = rpc_run_task(&task_setup_data);
1679 return PTR_ERR(task);
1680 status = nfs4_wait_for_completion_rpc_task(task);
1682 data->cancelled = 1;
1685 status = data->rpc_status;
1691 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1693 struct inode *dir = data->dir->d_inode;
1694 struct nfs_openres *o_res = &data->o_res;
1697 status = nfs4_run_open_task(data, 1);
1698 if (status != 0 || !data->rpc_done)
1701 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1703 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1704 status = _nfs4_proc_open_confirm(data);
1712 static int nfs4_opendata_access(struct rpc_cred *cred,
1713 struct nfs4_opendata *opendata,
1714 struct nfs4_state *state, fmode_t fmode,
1717 struct nfs_access_entry cache;
1720 /* access call failed or for some reason the server doesn't
1721 * support any access modes -- defer access call until later */
1722 if (opendata->o_res.access_supported == 0)
1726 /* don't check MAY_WRITE - a newly created file may not have
1727 * write mode bits, but POSIX allows the creating process to write.
1728 * use openflags to check for exec, because fmode won't
1729 * always have FMODE_EXEC set when file open for exec. */
1730 if (openflags & __FMODE_EXEC) {
1731 /* ONLY check for exec rights */
1733 } else if (fmode & FMODE_READ)
1737 cache.jiffies = jiffies;
1738 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1739 nfs_access_add_cache(state->inode, &cache);
1741 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
1744 /* even though OPEN succeeded, access is denied. Close the file */
1745 nfs4_close_state(state, fmode);
1750 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1752 static int _nfs4_proc_open(struct nfs4_opendata *data)
1754 struct inode *dir = data->dir->d_inode;
1755 struct nfs_server *server = NFS_SERVER(dir);
1756 struct nfs_openargs *o_arg = &data->o_arg;
1757 struct nfs_openres *o_res = &data->o_res;
1760 status = nfs4_run_open_task(data, 0);
1761 if (!data->rpc_done)
1764 if (status == -NFS4ERR_BADNAME &&
1765 !(o_arg->open_flags & O_CREAT))
1770 nfs_fattr_map_and_free_names(server, &data->f_attr);
1772 if (o_arg->open_flags & O_CREAT)
1773 update_changeattr(dir, &o_res->cinfo);
1774 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1775 server->caps &= ~NFS_CAP_POSIX_LOCK;
1776 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1777 status = _nfs4_proc_open_confirm(data);
1781 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1782 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1786 static int nfs4_recover_expired_lease(struct nfs_server *server)
1788 return nfs4_client_recover_expired_lease(server->nfs_client);
1793 * reclaim state on the server after a network partition.
1794 * Assumes caller holds the appropriate lock
1796 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1798 struct nfs4_opendata *opendata;
1801 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1802 NFS4_OPEN_CLAIM_FH);
1803 if (IS_ERR(opendata))
1804 return PTR_ERR(opendata);
1805 ret = nfs4_open_recover(opendata, state);
1807 d_drop(ctx->dentry);
1808 nfs4_opendata_put(opendata);
1812 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1814 struct nfs_server *server = NFS_SERVER(state->inode);
1815 struct nfs4_exception exception = { };
1819 err = _nfs4_open_expired(ctx, state);
1820 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1825 case -NFS4ERR_GRACE:
1826 case -NFS4ERR_DELAY:
1827 nfs4_handle_exception(server, err, &exception);
1830 } while (exception.retry);
1835 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1837 struct nfs_open_context *ctx;
1840 ctx = nfs4_state_find_open_context(state);
1843 ret = nfs4_do_open_expired(ctx, state);
1844 put_nfs_open_context(ctx);
1848 static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
1850 nfs_remove_bad_delegation(state->inode);
1851 write_seqlock(&state->seqlock);
1852 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1853 write_sequnlock(&state->seqlock);
1854 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1857 static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
1859 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
1860 nfs_finish_clear_delegation_stateid(state);
1863 static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1865 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
1866 nfs40_clear_delegation_stateid(state);
1867 return nfs4_open_expired(sp, state);
1870 #if defined(CONFIG_NFS_V4_1)
1871 static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
1873 struct nfs_server *server = NFS_SERVER(state->inode);
1874 nfs4_stateid *stateid = &state->stateid;
1877 /* If a state reset has been done, test_stateid is unneeded */
1878 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1881 status = nfs41_test_stateid(server, stateid);
1882 if (status != NFS_OK) {
1883 /* Free the stateid unless the server explicitly
1884 * informs us the stateid is unrecognized. */
1885 if (status != -NFS4ERR_BAD_STATEID)
1886 nfs41_free_stateid(server, stateid);
1887 nfs_remove_bad_delegation(state->inode);
1889 write_seqlock(&state->seqlock);
1890 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1891 write_sequnlock(&state->seqlock);
1892 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1897 * nfs41_check_open_stateid - possibly free an open stateid
1899 * @state: NFSv4 state for an inode
1901 * Returns NFS_OK if recovery for this stateid is now finished.
1902 * Otherwise a negative NFS4ERR value is returned.
1904 static int nfs41_check_open_stateid(struct nfs4_state *state)
1906 struct nfs_server *server = NFS_SERVER(state->inode);
1907 nfs4_stateid *stateid = &state->open_stateid;
1910 /* If a state reset has been done, test_stateid is unneeded */
1911 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1912 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1913 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1914 return -NFS4ERR_BAD_STATEID;
1916 status = nfs41_test_stateid(server, stateid);
1917 if (status != NFS_OK) {
1918 /* Free the stateid unless the server explicitly
1919 * informs us the stateid is unrecognized. */
1920 if (status != -NFS4ERR_BAD_STATEID)
1921 nfs41_free_stateid(server, stateid);
1923 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1924 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1925 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1926 clear_bit(NFS_OPEN_STATE, &state->flags);
1931 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1935 nfs41_clear_delegation_stateid(state);
1936 status = nfs41_check_open_stateid(state);
1937 if (status != NFS_OK)
1938 status = nfs4_open_expired(sp, state);
1944 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1945 * fields corresponding to attributes that were used to store the verifier.
1946 * Make sure we clobber those fields in the later setattr call
1948 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1950 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1951 !(sattr->ia_valid & ATTR_ATIME_SET))
1952 sattr->ia_valid |= ATTR_ATIME;
1954 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1955 !(sattr->ia_valid & ATTR_MTIME_SET))
1956 sattr->ia_valid |= ATTR_MTIME;
1959 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
1962 struct nfs4_state **res)
1964 struct nfs4_state_owner *sp = opendata->owner;
1965 struct nfs_server *server = sp->so_server;
1966 struct nfs4_state *state;
1970 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
1972 ret = _nfs4_proc_open(opendata);
1976 state = nfs4_opendata_to_nfs4_state(opendata);
1977 ret = PTR_ERR(state);
1980 if (server->caps & NFS_CAP_POSIX_LOCK)
1981 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1983 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
1987 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
1988 nfs4_schedule_stateid_recovery(server, state);
1995 * Returns a referenced nfs4_state
1997 static int _nfs4_do_open(struct inode *dir,
1998 struct dentry *dentry,
2001 struct iattr *sattr,
2002 struct rpc_cred *cred,
2003 struct nfs4_state **res,
2004 struct nfs4_threshold **ctx_th)
2006 struct nfs4_state_owner *sp;
2007 struct nfs4_state *state = NULL;
2008 struct nfs_server *server = NFS_SERVER(dir);
2009 struct nfs4_opendata *opendata;
2010 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
2013 /* Protect against reboot recovery conflicts */
2015 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2017 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2020 status = nfs4_recover_expired_lease(server);
2022 goto err_put_state_owner;
2023 if (dentry->d_inode != NULL)
2024 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
2026 if (dentry->d_inode)
2027 claim = NFS4_OPEN_CLAIM_FH;
2028 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
2030 if (opendata == NULL)
2031 goto err_put_state_owner;
2033 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2034 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2035 if (!opendata->f_attr.mdsthreshold)
2036 goto err_opendata_put;
2037 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
2039 if (dentry->d_inode != NULL)
2040 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
2042 status = _nfs4_open_and_get_state(opendata, fmode, flags, &state);
2044 goto err_opendata_put;
2046 if ((opendata->o_arg.open_flags & O_EXCL) &&
2047 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
2048 nfs4_exclusive_attrset(opendata, sattr);
2050 nfs_fattr_init(opendata->o_res.f_attr);
2051 status = nfs4_do_setattr(state->inode, cred,
2052 opendata->o_res.f_attr, sattr,
2055 nfs_setattr_update_inode(state->inode, sattr);
2056 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2059 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2060 *ctx_th = opendata->f_attr.mdsthreshold;
2062 kfree(opendata->f_attr.mdsthreshold);
2063 opendata->f_attr.mdsthreshold = NULL;
2065 nfs4_opendata_put(opendata);
2066 nfs4_put_state_owner(sp);
2070 kfree(opendata->f_attr.mdsthreshold);
2071 nfs4_opendata_put(opendata);
2072 err_put_state_owner:
2073 nfs4_put_state_owner(sp);
2080 static struct nfs4_state *nfs4_do_open(struct inode *dir,
2081 struct dentry *dentry,
2084 struct iattr *sattr,
2085 struct rpc_cred *cred,
2086 struct nfs4_threshold **ctx_th)
2088 struct nfs_server *server = NFS_SERVER(dir);
2089 struct nfs4_exception exception = { };
2090 struct nfs4_state *res;
2093 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
2095 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
2099 /* NOTE: BAD_SEQID means the server and client disagree about the
2100 * book-keeping w.r.t. state-changing operations
2101 * (OPEN/CLOSE/LOCK/LOCKU...)
2102 * It is actually a sign of a bug on the client or on the server.
2104 * If we receive a BAD_SEQID error in the particular case of
2105 * doing an OPEN, we assume that nfs_increment_open_seqid() will
2106 * have unhashed the old state_owner for us, and that we can
2107 * therefore safely retry using a new one. We should still warn
2108 * the user though...
2110 if (status == -NFS4ERR_BAD_SEQID) {
2111 pr_warn_ratelimited("NFS: v4 server %s "
2112 " returned a bad sequence-id error!\n",
2113 NFS_SERVER(dir)->nfs_client->cl_hostname);
2114 exception.retry = 1;
2118 * BAD_STATEID on OPEN means that the server cancelled our
2119 * state before it received the OPEN_CONFIRM.
2120 * Recover by retrying the request as per the discussion
2121 * on Page 181 of RFC3530.
2123 if (status == -NFS4ERR_BAD_STATEID) {
2124 exception.retry = 1;
2127 if (status == -EAGAIN) {
2128 /* We must have found a delegation */
2129 exception.retry = 1;
2132 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2134 res = ERR_PTR(nfs4_handle_exception(server,
2135 status, &exception));
2136 } while (exception.retry);
2140 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2141 struct nfs_fattr *fattr, struct iattr *sattr,
2142 struct nfs4_state *state)
2144 struct nfs_server *server = NFS_SERVER(inode);
2145 struct nfs_setattrargs arg = {
2146 .fh = NFS_FH(inode),
2149 .bitmask = server->attr_bitmask,
2151 struct nfs_setattrres res = {
2155 struct rpc_message msg = {
2156 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2161 unsigned long timestamp = jiffies;
2166 nfs_fattr_init(fattr);
2168 /* Servers should only apply open mode checks for file size changes */
2169 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2170 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2172 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2173 /* Use that stateid */
2174 } else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) {
2175 struct nfs_lockowner lockowner = {
2176 .l_owner = current->files,
2177 .l_pid = current->tgid,
2179 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2182 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
2184 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2185 if (status == 0 && state != NULL)
2186 renew_lease(server, timestamp);
2190 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2191 struct nfs_fattr *fattr, struct iattr *sattr,
2192 struct nfs4_state *state)
2194 struct nfs_server *server = NFS_SERVER(inode);
2195 struct nfs4_exception exception = {
2201 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2203 case -NFS4ERR_OPENMODE:
2204 if (!(sattr->ia_valid & ATTR_SIZE)) {
2205 pr_warn_once("NFSv4: server %s is incorrectly "
2206 "applying open mode checks to "
2207 "a SETATTR that is not "
2208 "changing file size.\n",
2209 server->nfs_client->cl_hostname);
2211 if (state && !(state->state & FMODE_WRITE)) {
2213 if (sattr->ia_valid & ATTR_OPEN)
2218 err = nfs4_handle_exception(server, err, &exception);
2219 } while (exception.retry);
2224 struct nfs4_closedata {
2225 struct inode *inode;
2226 struct nfs4_state *state;
2227 struct nfs_closeargs arg;
2228 struct nfs_closeres res;
2229 struct nfs_fattr fattr;
2230 unsigned long timestamp;
2235 static void nfs4_free_closedata(void *data)
2237 struct nfs4_closedata *calldata = data;
2238 struct nfs4_state_owner *sp = calldata->state->owner;
2239 struct super_block *sb = calldata->state->inode->i_sb;
2242 pnfs_roc_release(calldata->state->inode);
2243 nfs4_put_open_state(calldata->state);
2244 nfs_free_seqid(calldata->arg.seqid);
2245 nfs4_put_state_owner(sp);
2246 nfs_sb_deactive(sb);
2250 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2253 spin_lock(&state->owner->so_lock);
2254 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2255 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2257 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2260 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2263 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2264 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2265 clear_bit(NFS_OPEN_STATE, &state->flags);
2267 spin_unlock(&state->owner->so_lock);
2270 static void nfs4_close_done(struct rpc_task *task, void *data)
2272 struct nfs4_closedata *calldata = data;
2273 struct nfs4_state *state = calldata->state;
2274 struct nfs_server *server = NFS_SERVER(calldata->inode);
2276 dprintk("%s: begin!\n", __func__);
2277 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2279 /* hmm. we are done with the inode, and in the process of freeing
2280 * the state_owner. we keep this around to process errors
2282 switch (task->tk_status) {
2285 pnfs_roc_set_barrier(state->inode,
2286 calldata->roc_barrier);
2287 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
2288 renew_lease(server, calldata->timestamp);
2289 nfs4_close_clear_stateid_flags(state,
2290 calldata->arg.fmode);
2292 case -NFS4ERR_STALE_STATEID:
2293 case -NFS4ERR_OLD_STATEID:
2294 case -NFS4ERR_BAD_STATEID:
2295 case -NFS4ERR_EXPIRED:
2296 if (calldata->arg.fmode == 0)
2299 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2300 rpc_restart_call_prepare(task);
2302 nfs_release_seqid(calldata->arg.seqid);
2303 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2304 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2307 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2309 struct nfs4_closedata *calldata = data;
2310 struct nfs4_state *state = calldata->state;
2311 struct inode *inode = calldata->inode;
2312 bool is_rdonly, is_wronly, is_rdwr;
2315 dprintk("%s: begin!\n", __func__);
2316 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2319 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2320 spin_lock(&state->owner->so_lock);
2321 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2322 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2323 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
2324 /* Calculate the change in open mode */
2325 calldata->arg.fmode = 0;
2326 if (state->n_rdwr == 0) {
2327 if (state->n_rdonly == 0)
2328 call_close |= is_rdonly;
2330 calldata->arg.fmode |= FMODE_READ;
2331 if (state->n_wronly == 0)
2332 call_close |= is_wronly;
2334 calldata->arg.fmode |= FMODE_WRITE;
2336 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2338 if (calldata->arg.fmode == 0)
2339 call_close |= is_rdwr;
2341 if (!nfs4_valid_open_stateid(state))
2343 spin_unlock(&state->owner->so_lock);
2346 /* Note: exit _without_ calling nfs4_close_done */
2350 if (calldata->arg.fmode == 0) {
2351 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2352 if (calldata->roc &&
2353 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2354 nfs_release_seqid(calldata->arg.seqid);
2359 nfs_fattr_init(calldata->res.fattr);
2360 calldata->timestamp = jiffies;
2361 if (nfs4_setup_sequence(NFS_SERVER(inode),
2362 &calldata->arg.seq_args,
2363 &calldata->res.seq_res,
2365 nfs_release_seqid(calldata->arg.seqid);
2366 dprintk("%s: done!\n", __func__);
2369 task->tk_action = NULL;
2371 nfs4_sequence_done(task, &calldata->res.seq_res);
2374 static const struct rpc_call_ops nfs4_close_ops = {
2375 .rpc_call_prepare = nfs4_close_prepare,
2376 .rpc_call_done = nfs4_close_done,
2377 .rpc_release = nfs4_free_closedata,
2381 * It is possible for data to be read/written from a mem-mapped file
2382 * after the sys_close call (which hits the vfs layer as a flush).
2383 * This means that we can't safely call nfsv4 close on a file until
2384 * the inode is cleared. This in turn means that we are not good
2385 * NFSv4 citizens - we do not indicate to the server to update the file's
2386 * share state even when we are done with one of the three share
2387 * stateid's in the inode.
2389 * NOTE: Caller must be holding the sp->so_owner semaphore!
2391 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
2393 struct nfs_server *server = NFS_SERVER(state->inode);
2394 struct nfs4_closedata *calldata;
2395 struct nfs4_state_owner *sp = state->owner;
2396 struct rpc_task *task;
2397 struct rpc_message msg = {
2398 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2399 .rpc_cred = state->owner->so_cred,
2401 struct rpc_task_setup task_setup_data = {
2402 .rpc_client = server->client,
2403 .rpc_message = &msg,
2404 .callback_ops = &nfs4_close_ops,
2405 .workqueue = nfsiod_workqueue,
2406 .flags = RPC_TASK_ASYNC,
2408 int status = -ENOMEM;
2410 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2411 if (calldata == NULL)
2413 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2414 calldata->inode = state->inode;
2415 calldata->state = state;
2416 calldata->arg.fh = NFS_FH(state->inode);
2417 calldata->arg.stateid = &state->open_stateid;
2418 /* Serialization for the sequence id */
2419 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2420 if (calldata->arg.seqid == NULL)
2421 goto out_free_calldata;
2422 calldata->arg.fmode = 0;
2423 calldata->arg.bitmask = server->cache_consistency_bitmask;
2424 calldata->res.fattr = &calldata->fattr;
2425 calldata->res.seqid = calldata->arg.seqid;
2426 calldata->res.server = server;
2427 calldata->roc = pnfs_roc(state->inode);
2428 nfs_sb_active(calldata->inode->i_sb);
2430 msg.rpc_argp = &calldata->arg;
2431 msg.rpc_resp = &calldata->res;
2432 task_setup_data.callback_data = calldata;
2433 task = rpc_run_task(&task_setup_data);
2435 return PTR_ERR(task);
2438 status = rpc_wait_for_completion_task(task);
2444 nfs4_put_open_state(state);
2445 nfs4_put_state_owner(sp);
2449 static struct inode *
2450 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2452 struct nfs4_state *state;
2454 /* Protect against concurrent sillydeletes */
2455 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2456 ctx->cred, &ctx->mdsthreshold);
2458 return ERR_CAST(state);
2460 return igrab(state->inode);
2463 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2465 if (ctx->state == NULL)
2468 nfs4_close_sync(ctx->state, ctx->mode);
2470 nfs4_close_state(ctx->state, ctx->mode);
2473 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2475 struct nfs4_server_caps_arg args = {
2478 struct nfs4_server_caps_res res = {};
2479 struct rpc_message msg = {
2480 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2486 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2488 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2489 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2490 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2491 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2492 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2493 NFS_CAP_CTIME|NFS_CAP_MTIME);
2494 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2495 server->caps |= NFS_CAP_ACLS;
2496 if (res.has_links != 0)
2497 server->caps |= NFS_CAP_HARDLINKS;
2498 if (res.has_symlinks != 0)
2499 server->caps |= NFS_CAP_SYMLINKS;
2500 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2501 server->caps |= NFS_CAP_FILEID;
2502 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2503 server->caps |= NFS_CAP_MODE;
2504 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2505 server->caps |= NFS_CAP_NLINK;
2506 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2507 server->caps |= NFS_CAP_OWNER;
2508 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2509 server->caps |= NFS_CAP_OWNER_GROUP;
2510 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2511 server->caps |= NFS_CAP_ATIME;
2512 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2513 server->caps |= NFS_CAP_CTIME;
2514 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2515 server->caps |= NFS_CAP_MTIME;
2517 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2518 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2519 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2520 server->acl_bitmask = res.acl_bitmask;
2521 server->fh_expire_type = res.fh_expire_type;
2527 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2529 struct nfs4_exception exception = { };
2532 err = nfs4_handle_exception(server,
2533 _nfs4_server_capabilities(server, fhandle),
2535 } while (exception.retry);
2539 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2540 struct nfs_fsinfo *info)
2542 struct nfs4_lookup_root_arg args = {
2543 .bitmask = nfs4_fattr_bitmap,
2545 struct nfs4_lookup_res res = {
2547 .fattr = info->fattr,
2550 struct rpc_message msg = {
2551 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2556 nfs_fattr_init(info->fattr);
2557 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2560 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2561 struct nfs_fsinfo *info)
2563 struct nfs4_exception exception = { };
2566 err = _nfs4_lookup_root(server, fhandle, info);
2569 case -NFS4ERR_WRONGSEC:
2572 err = nfs4_handle_exception(server, err, &exception);
2574 } while (exception.retry);
2579 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2580 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2582 struct rpc_auth *auth;
2585 auth = rpcauth_create(flavor, server->client);
2590 ret = nfs4_lookup_root(server, fhandle, info);
2596 * Retry pseudoroot lookup with various security flavors. We do this when:
2598 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2599 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2601 * Returns zero on success, or a negative NFS4ERR value, or a
2602 * negative errno value.
2604 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2605 struct nfs_fsinfo *info)
2607 /* Per 3530bis 15.33.5 */
2608 static const rpc_authflavor_t flav_array[] = {
2612 RPC_AUTH_UNIX, /* courtesy */
2615 int status = -EPERM;
2618 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
2619 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2620 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2626 * -EACCESS could mean that the user doesn't have correct permissions
2627 * to access the mount. It could also mean that we tried to mount
2628 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2629 * existing mount programs don't handle -EACCES very well so it should
2630 * be mapped to -EPERM instead.
2632 if (status == -EACCES)
2637 static int nfs4_do_find_root_sec(struct nfs_server *server,
2638 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2640 int mv = server->nfs_client->cl_minorversion;
2641 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2645 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2646 * @server: initialized nfs_server handle
2647 * @fhandle: we fill in the pseudo-fs root file handle
2648 * @info: we fill in an FSINFO struct
2650 * Returns zero on success, or a negative errno.
2652 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2653 struct nfs_fsinfo *info)
2657 status = nfs4_lookup_root(server, fhandle, info);
2658 if ((status == -NFS4ERR_WRONGSEC) &&
2659 !(server->flags & NFS_MOUNT_SECFLAVOUR))
2660 status = nfs4_do_find_root_sec(server, fhandle, info);
2663 status = nfs4_server_capabilities(server, fhandle);
2665 status = nfs4_do_fsinfo(server, fhandle, info);
2667 return nfs4_map_errors(status);
2670 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2671 struct nfs_fsinfo *info)
2674 struct nfs_fattr *fattr = info->fattr;
2676 error = nfs4_server_capabilities(server, mntfh);
2678 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2682 error = nfs4_proc_getattr(server, mntfh, fattr);
2684 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2688 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2689 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2690 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2696 * Get locations and (maybe) other attributes of a referral.
2697 * Note that we'll actually follow the referral later when
2698 * we detect fsid mismatch in inode revalidation
2700 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2701 const struct qstr *name, struct nfs_fattr *fattr,
2702 struct nfs_fh *fhandle)
2704 int status = -ENOMEM;
2705 struct page *page = NULL;
2706 struct nfs4_fs_locations *locations = NULL;
2708 page = alloc_page(GFP_KERNEL);
2711 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2712 if (locations == NULL)
2715 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
2718 /* Make sure server returned a different fsid for the referral */
2719 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2720 dprintk("%s: server did not return a different fsid for"
2721 " a referral at %s\n", __func__, name->name);
2725 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2726 nfs_fixup_referral_attributes(&locations->fattr);
2728 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2729 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2730 memset(fhandle, 0, sizeof(struct nfs_fh));
2738 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2740 struct nfs4_getattr_arg args = {
2742 .bitmask = server->attr_bitmask,
2744 struct nfs4_getattr_res res = {
2748 struct rpc_message msg = {
2749 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2754 nfs_fattr_init(fattr);
2755 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2758 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2760 struct nfs4_exception exception = { };
2763 err = nfs4_handle_exception(server,
2764 _nfs4_proc_getattr(server, fhandle, fattr),
2766 } while (exception.retry);
2771 * The file is not closed if it is opened due to the a request to change
2772 * the size of the file. The open call will not be needed once the
2773 * VFS layer lookup-intents are implemented.
2775 * Close is called when the inode is destroyed.
2776 * If we haven't opened the file for O_WRONLY, we
2777 * need to in the size_change case to obtain a stateid.
2780 * Because OPEN is always done by name in nfsv4, it is
2781 * possible that we opened a different file by the same
2782 * name. We can recognize this race condition, but we
2783 * can't do anything about it besides returning an error.
2785 * This will be fixed with VFS changes (lookup-intent).
2788 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2789 struct iattr *sattr)
2791 struct inode *inode = dentry->d_inode;
2792 struct rpc_cred *cred = NULL;
2793 struct nfs4_state *state = NULL;
2796 if (pnfs_ld_layoutret_on_setattr(inode))
2797 pnfs_commit_and_return_layout(inode);
2799 nfs_fattr_init(fattr);
2801 /* Deal with open(O_TRUNC) */
2802 if (sattr->ia_valid & ATTR_OPEN)
2803 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2805 /* Optimization: if the end result is no change, don't RPC */
2806 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2809 /* Search for an existing open(O_WRITE) file */
2810 if (sattr->ia_valid & ATTR_FILE) {
2811 struct nfs_open_context *ctx;
2813 ctx = nfs_file_open_context(sattr->ia_file);
2820 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2822 nfs_setattr_update_inode(inode, sattr);
2826 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2827 const struct qstr *name, struct nfs_fh *fhandle,
2828 struct nfs_fattr *fattr)
2830 struct nfs_server *server = NFS_SERVER(dir);
2832 struct nfs4_lookup_arg args = {
2833 .bitmask = server->attr_bitmask,
2834 .dir_fh = NFS_FH(dir),
2837 struct nfs4_lookup_res res = {
2842 struct rpc_message msg = {
2843 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2848 nfs_fattr_init(fattr);
2850 dprintk("NFS call lookup %s\n", name->name);
2851 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2852 dprintk("NFS reply lookup: %d\n", status);
2856 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
2858 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2859 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
2860 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2864 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2865 struct qstr *name, struct nfs_fh *fhandle,
2866 struct nfs_fattr *fattr)
2868 struct nfs4_exception exception = { };
2869 struct rpc_clnt *client = *clnt;
2872 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2874 case -NFS4ERR_BADNAME:
2877 case -NFS4ERR_MOVED:
2878 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
2880 case -NFS4ERR_WRONGSEC:
2882 if (client != *clnt)
2885 client = nfs4_create_sec_client(client, dir, name);
2887 return PTR_ERR(client);
2889 exception.retry = 1;
2892 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
2894 } while (exception.retry);
2899 else if (client != *clnt)
2900 rpc_shutdown_client(client);
2905 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
2906 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2909 struct rpc_clnt *client = NFS_CLIENT(dir);
2911 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2912 if (client != NFS_CLIENT(dir)) {
2913 rpc_shutdown_client(client);
2914 nfs_fixup_secinfo_attributes(fattr);
2920 nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2921 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2924 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2926 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2928 rpc_shutdown_client(client);
2929 return ERR_PTR(status);
2934 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2936 struct nfs_server *server = NFS_SERVER(inode);
2937 struct nfs4_accessargs args = {
2938 .fh = NFS_FH(inode),
2939 .bitmask = server->cache_consistency_bitmask,
2941 struct nfs4_accessres res = {
2944 struct rpc_message msg = {
2945 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2948 .rpc_cred = entry->cred,
2950 int mode = entry->mask;
2954 * Determine which access bits we want to ask for...
2956 if (mode & MAY_READ)
2957 args.access |= NFS4_ACCESS_READ;
2958 if (S_ISDIR(inode->i_mode)) {
2959 if (mode & MAY_WRITE)
2960 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2961 if (mode & MAY_EXEC)
2962 args.access |= NFS4_ACCESS_LOOKUP;
2964 if (mode & MAY_WRITE)
2965 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2966 if (mode & MAY_EXEC)
2967 args.access |= NFS4_ACCESS_EXECUTE;
2970 res.fattr = nfs_alloc_fattr();
2971 if (res.fattr == NULL)
2974 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2976 nfs_access_set_mask(entry, res.access);
2977 nfs_refresh_inode(inode, res.fattr);
2979 nfs_free_fattr(res.fattr);
2983 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2985 struct nfs4_exception exception = { };
2988 err = nfs4_handle_exception(NFS_SERVER(inode),
2989 _nfs4_proc_access(inode, entry),
2991 } while (exception.retry);
2996 * TODO: For the time being, we don't try to get any attributes
2997 * along with any of the zero-copy operations READ, READDIR,
3000 * In the case of the first three, we want to put the GETATTR
3001 * after the read-type operation -- this is because it is hard
3002 * to predict the length of a GETATTR response in v4, and thus
3003 * align the READ data correctly. This means that the GETATTR
3004 * may end up partially falling into the page cache, and we should
3005 * shift it into the 'tail' of the xdr_buf before processing.
3006 * To do this efficiently, we need to know the total length
3007 * of data received, which doesn't seem to be available outside
3010 * In the case of WRITE, we also want to put the GETATTR after
3011 * the operation -- in this case because we want to make sure
3012 * we get the post-operation mtime and size.
3014 * Both of these changes to the XDR layer would in fact be quite
3015 * minor, but I decided to leave them for a subsequent patch.
3017 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3018 unsigned int pgbase, unsigned int pglen)
3020 struct nfs4_readlink args = {
3021 .fh = NFS_FH(inode),
3026 struct nfs4_readlink_res res;
3027 struct rpc_message msg = {
3028 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3033 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
3036 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3037 unsigned int pgbase, unsigned int pglen)
3039 struct nfs4_exception exception = { };
3042 err = nfs4_handle_exception(NFS_SERVER(inode),
3043 _nfs4_proc_readlink(inode, page, pgbase, pglen),
3045 } while (exception.retry);
3050 * This is just for mknod. open(O_CREAT) will always do ->open_context().
3053 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
3056 struct nfs_open_context *ctx;
3057 struct nfs4_state *state;
3060 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3062 return PTR_ERR(ctx);
3064 sattr->ia_mode &= ~current_umask();
3065 state = nfs4_do_open(dir, dentry, ctx->mode,
3066 flags, sattr, ctx->cred,
3067 &ctx->mdsthreshold);
3069 if (IS_ERR(state)) {
3070 status = PTR_ERR(state);
3073 d_add(dentry, igrab(state->inode));
3074 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
3077 put_nfs_open_context(ctx);
3081 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3083 struct nfs_server *server = NFS_SERVER(dir);
3084 struct nfs_removeargs args = {
3088 struct nfs_removeres res = {
3091 struct rpc_message msg = {
3092 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3098 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
3100 update_changeattr(dir, &res.cinfo);
3104 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3106 struct nfs4_exception exception = { };
3109 err = nfs4_handle_exception(NFS_SERVER(dir),
3110 _nfs4_proc_remove(dir, name),
3112 } while (exception.retry);
3116 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
3118 struct nfs_server *server = NFS_SERVER(dir);
3119 struct nfs_removeargs *args = msg->rpc_argp;
3120 struct nfs_removeres *res = msg->rpc_resp;
3122 res->server = server;
3123 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
3124 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
3127 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3129 nfs4_setup_sequence(NFS_SERVER(data->dir),
3130 &data->args.seq_args,
3135 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
3137 struct nfs_removeres *res = task->tk_msg.rpc_resp;
3139 if (!nfs4_sequence_done(task, &res->seq_res))
3141 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3143 update_changeattr(dir, &res->cinfo);
3147 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3149 struct nfs_server *server = NFS_SERVER(dir);
3150 struct nfs_renameargs *arg = msg->rpc_argp;
3151 struct nfs_renameres *res = msg->rpc_resp;
3153 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
3154 res->server = server;
3155 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
3158 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3160 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3161 &data->args.seq_args,
3166 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3167 struct inode *new_dir)
3169 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3171 if (!nfs4_sequence_done(task, &res->seq_res))
3173 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3176 update_changeattr(old_dir, &res->old_cinfo);
3177 update_changeattr(new_dir, &res->new_cinfo);
3181 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3182 struct inode *new_dir, struct qstr *new_name)
3184 struct nfs_server *server = NFS_SERVER(old_dir);
3185 struct nfs_renameargs arg = {
3186 .old_dir = NFS_FH(old_dir),
3187 .new_dir = NFS_FH(new_dir),
3188 .old_name = old_name,
3189 .new_name = new_name,
3191 struct nfs_renameres res = {
3194 struct rpc_message msg = {
3195 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3199 int status = -ENOMEM;
3201 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3203 update_changeattr(old_dir, &res.old_cinfo);
3204 update_changeattr(new_dir, &res.new_cinfo);
3209 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3210 struct inode *new_dir, struct qstr *new_name)
3212 struct nfs4_exception exception = { };
3215 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3216 _nfs4_proc_rename(old_dir, old_name,
3219 } while (exception.retry);
3223 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3225 struct nfs_server *server = NFS_SERVER(inode);
3226 struct nfs4_link_arg arg = {
3227 .fh = NFS_FH(inode),
3228 .dir_fh = NFS_FH(dir),
3230 .bitmask = server->attr_bitmask,
3232 struct nfs4_link_res res = {
3235 struct rpc_message msg = {
3236 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3240 int status = -ENOMEM;
3242 res.fattr = nfs_alloc_fattr();
3243 if (res.fattr == NULL)
3246 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3248 update_changeattr(dir, &res.cinfo);
3249 nfs_post_op_update_inode(inode, res.fattr);
3252 nfs_free_fattr(res.fattr);
3256 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3258 struct nfs4_exception exception = { };
3261 err = nfs4_handle_exception(NFS_SERVER(inode),
3262 _nfs4_proc_link(inode, dir, name),
3264 } while (exception.retry);
3268 struct nfs4_createdata {
3269 struct rpc_message msg;
3270 struct nfs4_create_arg arg;
3271 struct nfs4_create_res res;
3273 struct nfs_fattr fattr;
3276 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3277 struct qstr *name, struct iattr *sattr, u32 ftype)
3279 struct nfs4_createdata *data;
3281 data = kzalloc(sizeof(*data), GFP_KERNEL);
3283 struct nfs_server *server = NFS_SERVER(dir);
3285 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3286 data->msg.rpc_argp = &data->arg;
3287 data->msg.rpc_resp = &data->res;
3288 data->arg.dir_fh = NFS_FH(dir);
3289 data->arg.server = server;
3290 data->arg.name = name;
3291 data->arg.attrs = sattr;
3292 data->arg.ftype = ftype;
3293 data->arg.bitmask = server->attr_bitmask;
3294 data->res.server = server;
3295 data->res.fh = &data->fh;
3296 data->res.fattr = &data->fattr;
3297 nfs_fattr_init(data->res.fattr);
3302 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3304 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3305 &data->arg.seq_args, &data->res.seq_res, 1);
3307 update_changeattr(dir, &data->res.dir_cinfo);
3308 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3313 static void nfs4_free_createdata(struct nfs4_createdata *data)
3318 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3319 struct page *page, unsigned int len, struct iattr *sattr)
3321 struct nfs4_createdata *data;
3322 int status = -ENAMETOOLONG;
3324 if (len > NFS4_MAXPATHLEN)
3328 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3332 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3333 data->arg.u.symlink.pages = &page;
3334 data->arg.u.symlink.len = len;
3336 status = nfs4_do_create(dir, dentry, data);
3338 nfs4_free_createdata(data);
3343 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3344 struct page *page, unsigned int len, struct iattr *sattr)
3346 struct nfs4_exception exception = { };
3349 err = nfs4_handle_exception(NFS_SERVER(dir),
3350 _nfs4_proc_symlink(dir, dentry, page,
3353 } while (exception.retry);
3357 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3358 struct iattr *sattr)
3360 struct nfs4_createdata *data;
3361 int status = -ENOMEM;
3363 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3367 status = nfs4_do_create(dir, dentry, data);
3369 nfs4_free_createdata(data);
3374 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3375 struct iattr *sattr)
3377 struct nfs4_exception exception = { };
3380 sattr->ia_mode &= ~current_umask();
3382 err = nfs4_handle_exception(NFS_SERVER(dir),
3383 _nfs4_proc_mkdir(dir, dentry, sattr),
3385 } while (exception.retry);
3389 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3390 u64 cookie, struct page **pages, unsigned int count, int plus)
3392 struct inode *dir = dentry->d_inode;
3393 struct nfs4_readdir_arg args = {
3398 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3401 struct nfs4_readdir_res res;
3402 struct rpc_message msg = {
3403 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3410 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3411 dentry->d_parent->d_name.name,
3412 dentry->d_name.name,
3413 (unsigned long long)cookie);
3414 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
3415 res.pgbase = args.pgbase;
3416 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3418 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
3419 status += args.pgbase;
3422 nfs_invalidate_atime(dir);
3424 dprintk("%s: returns %d\n", __func__, status);
3428 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3429 u64 cookie, struct page **pages, unsigned int count, int plus)
3431 struct nfs4_exception exception = { };
3434 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3435 _nfs4_proc_readdir(dentry, cred, cookie,
3436 pages, count, plus),
3438 } while (exception.retry);
3442 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3443 struct iattr *sattr, dev_t rdev)
3445 struct nfs4_createdata *data;
3446 int mode = sattr->ia_mode;
3447 int status = -ENOMEM;
3449 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3454 data->arg.ftype = NF4FIFO;
3455 else if (S_ISBLK(mode)) {
3456 data->arg.ftype = NF4BLK;
3457 data->arg.u.device.specdata1 = MAJOR(rdev);
3458 data->arg.u.device.specdata2 = MINOR(rdev);
3460 else if (S_ISCHR(mode)) {
3461 data->arg.ftype = NF4CHR;
3462 data->arg.u.device.specdata1 = MAJOR(rdev);
3463 data->arg.u.device.specdata2 = MINOR(rdev);
3464 } else if (!S_ISSOCK(mode)) {
3469 status = nfs4_do_create(dir, dentry, data);
3471 nfs4_free_createdata(data);
3476 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3477 struct iattr *sattr, dev_t rdev)
3479 struct nfs4_exception exception = { };
3482 sattr->ia_mode &= ~current_umask();
3484 err = nfs4_handle_exception(NFS_SERVER(dir),
3485 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3487 } while (exception.retry);
3491 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3492 struct nfs_fsstat *fsstat)
3494 struct nfs4_statfs_arg args = {
3496 .bitmask = server->attr_bitmask,
3498 struct nfs4_statfs_res res = {
3501 struct rpc_message msg = {
3502 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3507 nfs_fattr_init(fsstat->fattr);
3508 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3511 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3513 struct nfs4_exception exception = { };
3516 err = nfs4_handle_exception(server,
3517 _nfs4_proc_statfs(server, fhandle, fsstat),
3519 } while (exception.retry);
3523 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3524 struct nfs_fsinfo *fsinfo)
3526 struct nfs4_fsinfo_arg args = {
3528 .bitmask = server->attr_bitmask,
3530 struct nfs4_fsinfo_res res = {
3533 struct rpc_message msg = {
3534 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3539 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3542 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3544 struct nfs4_exception exception = { };
3545 unsigned long now = jiffies;
3549 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
3551 struct nfs_client *clp = server->nfs_client;
3553 spin_lock(&clp->cl_lock);
3554 clp->cl_lease_time = fsinfo->lease_time * HZ;
3555 clp->cl_last_renewal = now;
3556 spin_unlock(&clp->cl_lock);
3559 err = nfs4_handle_exception(server, err, &exception);
3560 } while (exception.retry);
3564 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3568 nfs_fattr_init(fsinfo->fattr);
3569 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
3571 /* block layout checks this! */
3572 server->pnfs_blksize = fsinfo->blksize;
3573 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
3579 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3580 struct nfs_pathconf *pathconf)
3582 struct nfs4_pathconf_arg args = {
3584 .bitmask = server->attr_bitmask,
3586 struct nfs4_pathconf_res res = {
3587 .pathconf = pathconf,
3589 struct rpc_message msg = {
3590 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3595 /* None of the pathconf attributes are mandatory to implement */
3596 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3597 memset(pathconf, 0, sizeof(*pathconf));
3601 nfs_fattr_init(pathconf->fattr);
3602 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3605 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3606 struct nfs_pathconf *pathconf)
3608 struct nfs4_exception exception = { };
3612 err = nfs4_handle_exception(server,
3613 _nfs4_proc_pathconf(server, fhandle, pathconf),
3615 } while (exception.retry);
3619 int nfs4_set_rw_stateid(nfs4_stateid *stateid,
3620 const struct nfs_open_context *ctx,
3621 const struct nfs_lock_context *l_ctx,
3624 const struct nfs_lockowner *lockowner = NULL;
3627 lockowner = &l_ctx->lockowner;
3628 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
3630 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3632 static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3633 const struct nfs_open_context *ctx,
3634 const struct nfs_lock_context *l_ctx,
3637 nfs4_stateid current_stateid;
3639 /* If the current stateid represents a lost lock, then exit */
3640 if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode) == -EIO)
3642 return nfs4_stateid_match(stateid, ¤t_stateid);
3645 static bool nfs4_error_stateid_expired(int err)
3648 case -NFS4ERR_DELEG_REVOKED:
3649 case -NFS4ERR_ADMIN_REVOKED:
3650 case -NFS4ERR_BAD_STATEID:
3651 case -NFS4ERR_STALE_STATEID:
3652 case -NFS4ERR_OLD_STATEID:
3653 case -NFS4ERR_OPENMODE:
3654 case -NFS4ERR_EXPIRED:
3660 void __nfs4_read_done_cb(struct nfs_read_data *data)
3662 nfs_invalidate_atime(data->header->inode);
3665 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3667 struct nfs_server *server = NFS_SERVER(data->header->inode);
3669 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3670 rpc_restart_call_prepare(task);
3674 __nfs4_read_done_cb(data);
3675 if (task->tk_status > 0)
3676 renew_lease(server, data->timestamp);
3680 static bool nfs4_read_stateid_changed(struct rpc_task *task,
3681 struct nfs_readargs *args)
3684 if (!nfs4_error_stateid_expired(task->tk_status) ||
3685 nfs4_stateid_is_current(&args->stateid,
3690 rpc_restart_call_prepare(task);
3694 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3697 dprintk("--> %s\n", __func__);
3699 if (!nfs4_sequence_done(task, &data->res.seq_res))
3701 if (nfs4_read_stateid_changed(task, &data->args))
3703 return data->read_done_cb ? data->read_done_cb(task, data) :
3704 nfs4_read_done_cb(task, data);
3707 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3709 data->timestamp = jiffies;
3710 data->read_done_cb = nfs4_read_done_cb;
3711 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3712 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
3715 static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3717 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3718 &data->args.seq_args,
3722 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3723 data->args.lock_context, FMODE_READ);
3726 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3728 struct inode *inode = data->header->inode;
3730 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3731 rpc_restart_call_prepare(task);
3734 if (task->tk_status >= 0) {
3735 renew_lease(NFS_SERVER(inode), data->timestamp);
3736 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
3741 static bool nfs4_write_stateid_changed(struct rpc_task *task,
3742 struct nfs_writeargs *args)
3745 if (!nfs4_error_stateid_expired(task->tk_status) ||
3746 nfs4_stateid_is_current(&args->stateid,
3751 rpc_restart_call_prepare(task);
3755 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3757 if (!nfs4_sequence_done(task, &data->res.seq_res))
3759 if (nfs4_write_stateid_changed(task, &data->args))
3761 return data->write_done_cb ? data->write_done_cb(task, data) :
3762 nfs4_write_done_cb(task, data);
3766 bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
3768 const struct nfs_pgio_header *hdr = data->header;
3770 /* Don't request attributes for pNFS or O_DIRECT writes */
3771 if (data->ds_clp != NULL || hdr->dreq != NULL)
3773 /* Otherwise, request attributes if and only if we don't hold
3776 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
3779 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3781 struct nfs_server *server = NFS_SERVER(data->header->inode);
3783 if (!nfs4_write_need_cache_consistency_data(data)) {
3784 data->args.bitmask = NULL;
3785 data->res.fattr = NULL;
3787 data->args.bitmask = server->cache_consistency_bitmask;
3789 if (!data->write_done_cb)
3790 data->write_done_cb = nfs4_write_done_cb;
3791 data->res.server = server;
3792 data->timestamp = jiffies;
3794 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3795 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3798 static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3800 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3801 &data->args.seq_args,
3805 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3806 data->args.lock_context, FMODE_WRITE);
3809 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
3811 nfs4_setup_sequence(NFS_SERVER(data->inode),
3812 &data->args.seq_args,
3817 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
3819 struct inode *inode = data->inode;
3821 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3822 rpc_restart_call_prepare(task);
3828 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
3830 if (!nfs4_sequence_done(task, &data->res.seq_res))
3832 return data->commit_done_cb(task, data);
3835 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
3837 struct nfs_server *server = NFS_SERVER(data->inode);
3839 if (data->commit_done_cb == NULL)
3840 data->commit_done_cb = nfs4_commit_done_cb;
3841 data->res.server = server;
3842 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3843 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3846 struct nfs4_renewdata {
3847 struct nfs_client *client;
3848 unsigned long timestamp;
3852 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3853 * standalone procedure for queueing an asynchronous RENEW.
3855 static void nfs4_renew_release(void *calldata)
3857 struct nfs4_renewdata *data = calldata;
3858 struct nfs_client *clp = data->client;
3860 if (atomic_read(&clp->cl_count) > 1)
3861 nfs4_schedule_state_renewal(clp);
3862 nfs_put_client(clp);
3866 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3868 struct nfs4_renewdata *data = calldata;
3869 struct nfs_client *clp = data->client;
3870 unsigned long timestamp = data->timestamp;
3872 if (task->tk_status < 0) {
3873 /* Unless we're shutting down, schedule state recovery! */
3874 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3876 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3877 nfs4_schedule_lease_recovery(clp);
3880 nfs4_schedule_path_down_recovery(clp);
3882 do_renew_lease(clp, timestamp);
3885 static const struct rpc_call_ops nfs4_renew_ops = {
3886 .rpc_call_done = nfs4_renew_done,
3887 .rpc_release = nfs4_renew_release,
3890 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3892 struct rpc_message msg = {
3893 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3897 struct nfs4_renewdata *data;
3899 if (renew_flags == 0)
3901 if (!atomic_inc_not_zero(&clp->cl_count))
3903 data = kmalloc(sizeof(*data), GFP_NOFS);
3907 data->timestamp = jiffies;
3908 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
3909 &nfs4_renew_ops, data);
3912 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3914 struct rpc_message msg = {
3915 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3919 unsigned long now = jiffies;
3922 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3925 do_renew_lease(clp, now);
3929 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3931 return (server->caps & NFS_CAP_ACLS)
3932 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3933 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3936 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3937 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
3940 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
3942 static int buf_to_pages_noslab(const void *buf, size_t buflen,
3943 struct page **pages, unsigned int *pgbase)
3945 struct page *newpage, **spages;
3951 len = min_t(size_t, PAGE_SIZE, buflen);
3952 newpage = alloc_page(GFP_KERNEL);
3954 if (newpage == NULL)
3956 memcpy(page_address(newpage), buf, len);
3961 } while (buflen != 0);
3967 __free_page(spages[rc-1]);
3971 struct nfs4_cached_acl {
3977 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3979 struct nfs_inode *nfsi = NFS_I(inode);
3981 spin_lock(&inode->i_lock);
3982 kfree(nfsi->nfs4_acl);
3983 nfsi->nfs4_acl = acl;
3984 spin_unlock(&inode->i_lock);
3987 static void nfs4_zap_acl_attr(struct inode *inode)
3989 nfs4_set_cached_acl(inode, NULL);
3992 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3994 struct nfs_inode *nfsi = NFS_I(inode);
3995 struct nfs4_cached_acl *acl;
3998 spin_lock(&inode->i_lock);
3999 acl = nfsi->nfs4_acl;
4002 if (buf == NULL) /* user is just asking for length */
4004 if (acl->cached == 0)
4006 ret = -ERANGE; /* see getxattr(2) man page */
4007 if (acl->len > buflen)
4009 memcpy(buf, acl->data, acl->len);
4013 spin_unlock(&inode->i_lock);
4017 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
4019 struct nfs4_cached_acl *acl;
4020 size_t buflen = sizeof(*acl) + acl_len;
4022 if (buflen <= PAGE_SIZE) {
4023 acl = kmalloc(buflen, GFP_KERNEL);
4027 _copy_from_pages(acl->data, pages, pgbase, acl_len);
4029 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4036 nfs4_set_cached_acl(inode, acl);
4040 * The getxattr API returns the required buffer length when called with a
4041 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4042 * the required buf. On a NULL buf, we send a page of data to the server
4043 * guessing that the ACL request can be serviced by a page. If so, we cache
4044 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4045 * the cache. If not so, we throw away the page, and cache the required
4046 * length. The next getxattr call will then produce another round trip to
4047 * the server, this time with the input buf of the required size.
4049 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4051 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
4052 struct nfs_getaclargs args = {
4053 .fh = NFS_FH(inode),
4057 struct nfs_getaclres res = {
4060 struct rpc_message msg = {
4061 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4065 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4066 int ret = -ENOMEM, i;
4068 /* As long as we're doing a round trip to the server anyway,
4069 * let's be prepared for a page of acl data. */
4072 if (npages > ARRAY_SIZE(pages))
4075 for (i = 0; i < npages; i++) {
4076 pages[i] = alloc_page(GFP_KERNEL);
4081 /* for decoding across pages */
4082 res.acl_scratch = alloc_page(GFP_KERNEL);
4083 if (!res.acl_scratch)
4086 args.acl_len = npages * PAGE_SIZE;
4087 args.acl_pgbase = 0;
4089 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
4090 __func__, buf, buflen, npages, args.acl_len);
4091 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4092 &msg, &args.seq_args, &res.seq_res, 0);
4096 /* Handle the case where the passed-in buffer is too short */
4097 if (res.acl_flags & NFS4_ACL_TRUNC) {
4098 /* Did the user only issue a request for the acl length? */
4104 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
4106 if (res.acl_len > buflen) {
4110 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
4115 for (i = 0; i < npages; i++)
4117 __free_page(pages[i]);
4118 if (res.acl_scratch)
4119 __free_page(res.acl_scratch);
4123 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4125 struct nfs4_exception exception = { };
4128 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4131 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4132 } while (exception.retry);
4136 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4138 struct nfs_server *server = NFS_SERVER(inode);
4141 if (!nfs4_server_supports_acls(server))
4143 ret = nfs_revalidate_inode(server, inode);
4146 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4147 nfs_zap_acl_cache(inode);
4148 ret = nfs4_read_cached_acl(inode, buf, buflen);
4150 /* -ENOENT is returned if there is no ACL or if there is an ACL
4151 * but no cached acl data, just the acl length */
4153 return nfs4_get_acl_uncached(inode, buf, buflen);
4156 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4158 struct nfs_server *server = NFS_SERVER(inode);
4159 struct page *pages[NFS4ACL_MAXPAGES];
4160 struct nfs_setaclargs arg = {
4161 .fh = NFS_FH(inode),
4165 struct nfs_setaclres res;
4166 struct rpc_message msg = {
4167 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4171 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4174 if (!nfs4_server_supports_acls(server))
4176 if (npages > ARRAY_SIZE(pages))
4178 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4181 nfs4_inode_return_delegation(inode);
4182 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4185 * Free each page after tx, so the only ref left is
4186 * held by the network stack
4189 put_page(pages[i-1]);
4192 * Acl update can result in inode attribute update.
4193 * so mark the attribute cache invalid.
4195 spin_lock(&inode->i_lock);
4196 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4197 spin_unlock(&inode->i_lock);
4198 nfs_access_zap_cache(inode);
4199 nfs_zap_acl_cache(inode);
4203 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4205 struct nfs4_exception exception = { };
4208 err = nfs4_handle_exception(NFS_SERVER(inode),
4209 __nfs4_proc_set_acl(inode, buf, buflen),
4211 } while (exception.retry);
4216 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
4218 struct nfs_client *clp = server->nfs_client;
4220 if (task->tk_status >= 0)
4222 switch(task->tk_status) {
4223 case -NFS4ERR_DELEG_REVOKED:
4224 case -NFS4ERR_ADMIN_REVOKED:
4225 case -NFS4ERR_BAD_STATEID:
4228 nfs_remove_bad_delegation(state->inode);
4229 case -NFS4ERR_OPENMODE:
4232 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4233 goto stateid_invalid;
4234 goto wait_on_recovery;
4235 case -NFS4ERR_EXPIRED:
4236 if (state != NULL) {
4237 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4238 goto stateid_invalid;
4240 case -NFS4ERR_STALE_STATEID:
4241 case -NFS4ERR_STALE_CLIENTID:
4242 nfs4_schedule_lease_recovery(clp);
4243 goto wait_on_recovery;
4244 #if defined(CONFIG_NFS_V4_1)
4245 case -NFS4ERR_BADSESSION:
4246 case -NFS4ERR_BADSLOT:
4247 case -NFS4ERR_BAD_HIGH_SLOT:
4248 case -NFS4ERR_DEADSESSION:
4249 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4250 case -NFS4ERR_SEQ_FALSE_RETRY:
4251 case -NFS4ERR_SEQ_MISORDERED:
4252 dprintk("%s ERROR %d, Reset session\n", __func__,
4254 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4255 goto wait_on_recovery;
4256 #endif /* CONFIG_NFS_V4_1 */
4257 case -NFS4ERR_DELAY:
4258 nfs_inc_server_stats(server, NFSIOS_DELAY);
4259 case -NFS4ERR_GRACE:
4260 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4261 task->tk_status = 0;
4263 case -NFS4ERR_RETRY_UNCACHED_REP:
4264 case -NFS4ERR_OLD_STATEID:
4265 task->tk_status = 0;
4268 task->tk_status = nfs4_map_errors(task->tk_status);
4271 task->tk_status = -EIO;
4274 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
4275 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4276 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4277 task->tk_status = 0;
4281 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4282 nfs4_verifier *bootverf)
4286 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4287 /* An impossible timestamp guarantees this value
4288 * will never match a generated boot time. */
4290 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4292 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4293 verf[0] = (__be32)nn->boot_time.tv_sec;
4294 verf[1] = (__be32)nn->boot_time.tv_nsec;
4296 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4300 nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4301 char *buf, size_t len)
4303 unsigned int result;
4306 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4308 rpc_peeraddr2str(clp->cl_rpcclient,
4310 rpc_peeraddr2str(clp->cl_rpcclient,
4311 RPC_DISPLAY_PROTO));
4317 nfs4_init_uniform_client_string(const struct nfs_client *clp,
4318 char *buf, size_t len)
4320 char *nodename = clp->cl_rpcclient->cl_nodename;
4322 if (nfs4_client_id_uniquifier[0] != '\0')
4323 nodename = nfs4_client_id_uniquifier;
4324 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4325 clp->rpc_ops->version, clp->cl_minorversion,
4330 * nfs4_proc_setclientid - Negotiate client ID
4331 * @clp: state data structure
4332 * @program: RPC program for NFSv4 callback service
4333 * @port: IP port number for NFS4 callback service
4334 * @cred: RPC credential to use for this call
4335 * @res: where to place the result
4337 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4339 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4340 unsigned short port, struct rpc_cred *cred,
4341 struct nfs4_setclientid_res *res)
4343 nfs4_verifier sc_verifier;
4344 struct nfs4_setclientid setclientid = {
4345 .sc_verifier = &sc_verifier,
4347 .sc_cb_ident = clp->cl_cb_ident,
4349 struct rpc_message msg = {
4350 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4351 .rpc_argp = &setclientid,
4357 /* nfs_client_id4 */
4358 nfs4_init_boot_verifier(clp, &sc_verifier);
4359 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4360 setclientid.sc_name_len =
4361 nfs4_init_uniform_client_string(clp,
4362 setclientid.sc_name,
4363 sizeof(setclientid.sc_name));
4365 setclientid.sc_name_len =
4366 nfs4_init_nonuniform_client_string(clp,
4367 setclientid.sc_name,
4368 sizeof(setclientid.sc_name));
4371 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
4372 sizeof(setclientid.sc_netid),
4373 rpc_peeraddr2str(clp->cl_rpcclient,
4374 RPC_DISPLAY_NETID));
4376 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
4377 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
4378 clp->cl_ipaddr, port >> 8, port & 255);
4380 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4381 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4382 setclientid.sc_name_len, setclientid.sc_name);
4383 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4384 dprintk("NFS reply setclientid: %d\n", status);
4389 * nfs4_proc_setclientid_confirm - Confirm client ID
4390 * @clp: state data structure
4391 * @res: result of a previous SETCLIENTID
4392 * @cred: RPC credential to use for this call
4394 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4396 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
4397 struct nfs4_setclientid_res *arg,
4398 struct rpc_cred *cred)
4400 struct rpc_message msg = {
4401 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
4407 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4408 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4410 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4411 dprintk("NFS reply setclientid_confirm: %d\n", status);
4415 struct nfs4_delegreturndata {
4416 struct nfs4_delegreturnargs args;
4417 struct nfs4_delegreturnres res;
4419 nfs4_stateid stateid;
4420 unsigned long timestamp;
4421 struct nfs_fattr fattr;
4425 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4427 struct nfs4_delegreturndata *data = calldata;
4429 if (!nfs4_sequence_done(task, &data->res.seq_res))
4432 switch (task->tk_status) {
4434 renew_lease(data->res.server, data->timestamp);
4436 case -NFS4ERR_ADMIN_REVOKED:
4437 case -NFS4ERR_DELEG_REVOKED:
4438 case -NFS4ERR_BAD_STATEID:
4439 case -NFS4ERR_OLD_STATEID:
4440 case -NFS4ERR_STALE_STATEID:
4441 case -NFS4ERR_EXPIRED:
4442 task->tk_status = 0;
4445 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4447 rpc_restart_call_prepare(task);
4451 data->rpc_status = task->tk_status;
4454 static void nfs4_delegreturn_release(void *calldata)
4459 #if defined(CONFIG_NFS_V4_1)
4460 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4462 struct nfs4_delegreturndata *d_data;
4464 d_data = (struct nfs4_delegreturndata *)data;
4466 nfs4_setup_sequence(d_data->res.server,
4467 &d_data->args.seq_args,
4468 &d_data->res.seq_res,
4471 #endif /* CONFIG_NFS_V4_1 */
4473 static const struct rpc_call_ops nfs4_delegreturn_ops = {
4474 #if defined(CONFIG_NFS_V4_1)
4475 .rpc_call_prepare = nfs4_delegreturn_prepare,
4476 #endif /* CONFIG_NFS_V4_1 */
4477 .rpc_call_done = nfs4_delegreturn_done,
4478 .rpc_release = nfs4_delegreturn_release,
4481 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4483 struct nfs4_delegreturndata *data;
4484 struct nfs_server *server = NFS_SERVER(inode);
4485 struct rpc_task *task;
4486 struct rpc_message msg = {
4487 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4490 struct rpc_task_setup task_setup_data = {
4491 .rpc_client = server->client,
4492 .rpc_message = &msg,
4493 .callback_ops = &nfs4_delegreturn_ops,
4494 .flags = RPC_TASK_ASYNC,
4498 data = kzalloc(sizeof(*data), GFP_NOFS);
4501 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4502 data->args.fhandle = &data->fh;
4503 data->args.stateid = &data->stateid;
4504 data->args.bitmask = server->cache_consistency_bitmask;
4505 nfs_copy_fh(&data->fh, NFS_FH(inode));
4506 nfs4_stateid_copy(&data->stateid, stateid);
4507 data->res.fattr = &data->fattr;
4508 data->res.server = server;
4509 nfs_fattr_init(data->res.fattr);
4510 data->timestamp = jiffies;
4511 data->rpc_status = 0;
4513 task_setup_data.callback_data = data;
4514 msg.rpc_argp = &data->args;
4515 msg.rpc_resp = &data->res;
4516 task = rpc_run_task(&task_setup_data);
4518 return PTR_ERR(task);
4521 status = nfs4_wait_for_completion_rpc_task(task);
4524 status = data->rpc_status;
4526 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4528 nfs_refresh_inode(inode, &data->fattr);
4534 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4536 struct nfs_server *server = NFS_SERVER(inode);
4537 struct nfs4_exception exception = { };
4540 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
4542 case -NFS4ERR_STALE_STATEID:
4543 case -NFS4ERR_EXPIRED:
4547 err = nfs4_handle_exception(server, err, &exception);
4548 } while (exception.retry);
4552 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4553 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4556 * sleep, with exponential backoff, and retry the LOCK operation.
4558 static unsigned long
4559 nfs4_set_lock_task_retry(unsigned long timeout)
4561 freezable_schedule_timeout_killable(timeout);
4563 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4564 return NFS4_LOCK_MAXTIMEOUT;
4568 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4570 struct inode *inode = state->inode;
4571 struct nfs_server *server = NFS_SERVER(inode);
4572 struct nfs_client *clp = server->nfs_client;
4573 struct nfs_lockt_args arg = {
4574 .fh = NFS_FH(inode),
4577 struct nfs_lockt_res res = {
4580 struct rpc_message msg = {
4581 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4584 .rpc_cred = state->owner->so_cred,
4586 struct nfs4_lock_state *lsp;
4589 arg.lock_owner.clientid = clp->cl_clientid;
4590 status = nfs4_set_lock_state(state, request);
4593 lsp = request->fl_u.nfs4_fl.owner;
4594 arg.lock_owner.id = lsp->ls_seqid.owner_id;
4595 arg.lock_owner.s_dev = server->s_dev;
4596 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4599 request->fl_type = F_UNLCK;
4601 case -NFS4ERR_DENIED:
4604 request->fl_ops->fl_release_private(request);
4605 request->fl_ops = NULL;
4610 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4612 struct nfs4_exception exception = { };
4616 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4617 _nfs4_proc_getlk(state, cmd, request),
4619 } while (exception.retry);
4623 static int do_vfs_lock(struct file *file, struct file_lock *fl)
4626 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4628 res = posix_lock_file_wait(file, fl);
4631 res = flock_lock_file_wait(file, fl);
4639 struct nfs4_unlockdata {
4640 struct nfs_locku_args arg;
4641 struct nfs_locku_res res;
4642 struct nfs4_lock_state *lsp;
4643 struct nfs_open_context *ctx;
4644 struct file_lock fl;
4645 const struct nfs_server *server;
4646 unsigned long timestamp;
4649 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4650 struct nfs_open_context *ctx,
4651 struct nfs4_lock_state *lsp,
4652 struct nfs_seqid *seqid)
4654 struct nfs4_unlockdata *p;
4655 struct inode *inode = lsp->ls_state->inode;
4657 p = kzalloc(sizeof(*p), GFP_NOFS);
4660 p->arg.fh = NFS_FH(inode);
4662 p->arg.seqid = seqid;
4663 p->res.seqid = seqid;
4664 p->arg.stateid = &lsp->ls_stateid;
4666 atomic_inc(&lsp->ls_count);
4667 /* Ensure we don't close file until we're done freeing locks! */
4668 p->ctx = get_nfs_open_context(ctx);
4669 memcpy(&p->fl, fl, sizeof(p->fl));
4670 p->server = NFS_SERVER(inode);
4674 static void nfs4_locku_release_calldata(void *data)
4676 struct nfs4_unlockdata *calldata = data;
4677 nfs_free_seqid(calldata->arg.seqid);
4678 nfs4_put_lock_state(calldata->lsp);
4679 put_nfs_open_context(calldata->ctx);
4683 static void nfs4_locku_done(struct rpc_task *task, void *data)
4685 struct nfs4_unlockdata *calldata = data;
4687 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4689 switch (task->tk_status) {
4691 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4692 &calldata->res.stateid);
4693 renew_lease(calldata->server, calldata->timestamp);
4695 case -NFS4ERR_BAD_STATEID:
4696 case -NFS4ERR_OLD_STATEID:
4697 case -NFS4ERR_STALE_STATEID:
4698 case -NFS4ERR_EXPIRED:
4701 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4702 rpc_restart_call_prepare(task);
4704 nfs_release_seqid(calldata->arg.seqid);
4707 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4709 struct nfs4_unlockdata *calldata = data;
4711 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4713 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
4714 /* Note: exit _without_ running nfs4_locku_done */
4717 calldata->timestamp = jiffies;
4718 if (nfs4_setup_sequence(calldata->server,
4719 &calldata->arg.seq_args,
4720 &calldata->res.seq_res,
4722 nfs_release_seqid(calldata->arg.seqid);
4725 task->tk_action = NULL;
4727 nfs4_sequence_done(task, &calldata->res.seq_res);
4730 static const struct rpc_call_ops nfs4_locku_ops = {
4731 .rpc_call_prepare = nfs4_locku_prepare,
4732 .rpc_call_done = nfs4_locku_done,
4733 .rpc_release = nfs4_locku_release_calldata,
4736 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4737 struct nfs_open_context *ctx,
4738 struct nfs4_lock_state *lsp,
4739 struct nfs_seqid *seqid)
4741 struct nfs4_unlockdata *data;
4742 struct rpc_message msg = {
4743 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4744 .rpc_cred = ctx->cred,
4746 struct rpc_task_setup task_setup_data = {
4747 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4748 .rpc_message = &msg,
4749 .callback_ops = &nfs4_locku_ops,
4750 .workqueue = nfsiod_workqueue,
4751 .flags = RPC_TASK_ASYNC,
4754 /* Ensure this is an unlock - when canceling a lock, the
4755 * canceled lock is passed in, and it won't be an unlock.
4757 fl->fl_type = F_UNLCK;
4759 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4761 nfs_free_seqid(seqid);
4762 return ERR_PTR(-ENOMEM);
4765 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4766 msg.rpc_argp = &data->arg;
4767 msg.rpc_resp = &data->res;
4768 task_setup_data.callback_data = data;
4769 return rpc_run_task(&task_setup_data);
4772 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4774 struct inode *inode = state->inode;
4775 struct nfs4_state_owner *sp = state->owner;
4776 struct nfs_inode *nfsi = NFS_I(inode);
4777 struct nfs_seqid *seqid;
4778 struct nfs4_lock_state *lsp;
4779 struct rpc_task *task;
4781 unsigned char fl_flags = request->fl_flags;
4783 status = nfs4_set_lock_state(state, request);
4784 /* Unlock _before_ we do the RPC call */
4785 request->fl_flags |= FL_EXISTS;
4786 /* Exclude nfs_delegation_claim_locks() */
4787 mutex_lock(&sp->so_delegreturn_mutex);
4788 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
4789 down_read(&nfsi->rwsem);
4790 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4791 up_read(&nfsi->rwsem);
4792 mutex_unlock(&sp->so_delegreturn_mutex);
4795 up_read(&nfsi->rwsem);
4796 mutex_unlock(&sp->so_delegreturn_mutex);
4799 /* Is this a delegated lock? */
4800 lsp = request->fl_u.nfs4_fl.owner;
4801 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
4803 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4807 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4808 status = PTR_ERR(task);
4811 status = nfs4_wait_for_completion_rpc_task(task);
4814 request->fl_flags = fl_flags;
4818 struct nfs4_lockdata {
4819 struct nfs_lock_args arg;
4820 struct nfs_lock_res res;
4821 struct nfs4_lock_state *lsp;
4822 struct nfs_open_context *ctx;
4823 struct file_lock fl;
4824 unsigned long timestamp;
4827 struct nfs_server *server;
4830 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4831 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4834 struct nfs4_lockdata *p;
4835 struct inode *inode = lsp->ls_state->inode;
4836 struct nfs_server *server = NFS_SERVER(inode);
4838 p = kzalloc(sizeof(*p), gfp_mask);
4842 p->arg.fh = NFS_FH(inode);
4844 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4845 if (p->arg.open_seqid == NULL)
4847 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4848 if (p->arg.lock_seqid == NULL)
4849 goto out_free_seqid;
4850 p->arg.lock_stateid = &lsp->ls_stateid;
4851 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4852 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
4853 p->arg.lock_owner.s_dev = server->s_dev;
4854 p->res.lock_seqid = p->arg.lock_seqid;
4857 atomic_inc(&lsp->ls_count);
4858 p->ctx = get_nfs_open_context(ctx);
4859 memcpy(&p->fl, fl, sizeof(p->fl));
4862 nfs_free_seqid(p->arg.open_seqid);
4868 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4870 struct nfs4_lockdata *data = calldata;
4871 struct nfs4_state *state = data->lsp->ls_state;
4873 dprintk("%s: begin!\n", __func__);
4874 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4876 /* Do we need to do an open_to_lock_owner? */
4877 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4878 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
4879 goto out_release_lock_seqid;
4881 data->arg.open_stateid = &state->open_stateid;
4882 data->arg.new_lock_owner = 1;
4883 data->res.open_seqid = data->arg.open_seqid;
4885 data->arg.new_lock_owner = 0;
4886 if (!nfs4_valid_open_stateid(state)) {
4887 data->rpc_status = -EBADF;
4888 task->tk_action = NULL;
4889 goto out_release_open_seqid;
4891 data->timestamp = jiffies;
4892 if (nfs4_setup_sequence(data->server,
4893 &data->arg.seq_args,
4897 out_release_open_seqid:
4898 nfs_release_seqid(data->arg.open_seqid);
4899 out_release_lock_seqid:
4900 nfs_release_seqid(data->arg.lock_seqid);
4902 nfs4_sequence_done(task, &data->res.seq_res);
4903 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4906 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4908 struct nfs4_lockdata *data = calldata;
4910 dprintk("%s: begin!\n", __func__);
4912 if (!nfs4_sequence_done(task, &data->res.seq_res))
4915 data->rpc_status = task->tk_status;
4916 if (data->arg.new_lock_owner != 0) {
4917 if (data->rpc_status == 0)
4918 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4922 if (data->rpc_status == 0) {
4923 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
4924 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
4925 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4928 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4931 static void nfs4_lock_release(void *calldata)
4933 struct nfs4_lockdata *data = calldata;
4935 dprintk("%s: begin!\n", __func__);
4936 nfs_free_seqid(data->arg.open_seqid);
4937 if (data->cancelled != 0) {
4938 struct rpc_task *task;
4939 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4940 data->arg.lock_seqid);
4942 rpc_put_task_async(task);
4943 dprintk("%s: cancelling lock!\n", __func__);
4945 nfs_free_seqid(data->arg.lock_seqid);
4946 nfs4_put_lock_state(data->lsp);
4947 put_nfs_open_context(data->ctx);
4949 dprintk("%s: done!\n", __func__);
4952 static const struct rpc_call_ops nfs4_lock_ops = {
4953 .rpc_call_prepare = nfs4_lock_prepare,
4954 .rpc_call_done = nfs4_lock_done,
4955 .rpc_release = nfs4_lock_release,
4958 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4961 case -NFS4ERR_ADMIN_REVOKED:
4962 case -NFS4ERR_BAD_STATEID:
4963 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4964 if (new_lock_owner != 0 ||
4965 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
4966 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4968 case -NFS4ERR_STALE_STATEID:
4969 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4970 case -NFS4ERR_EXPIRED:
4971 nfs4_schedule_lease_recovery(server->nfs_client);
4975 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4977 struct nfs4_lockdata *data;
4978 struct rpc_task *task;
4979 struct rpc_message msg = {
4980 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4981 .rpc_cred = state->owner->so_cred,
4983 struct rpc_task_setup task_setup_data = {
4984 .rpc_client = NFS_CLIENT(state->inode),
4985 .rpc_message = &msg,
4986 .callback_ops = &nfs4_lock_ops,
4987 .workqueue = nfsiod_workqueue,
4988 .flags = RPC_TASK_ASYNC,
4992 dprintk("%s: begin!\n", __func__);
4993 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4994 fl->fl_u.nfs4_fl.owner,
4995 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4999 data->arg.block = 1;
5000 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5001 msg.rpc_argp = &data->arg;
5002 msg.rpc_resp = &data->res;
5003 task_setup_data.callback_data = data;
5004 if (recovery_type > NFS_LOCK_NEW) {
5005 if (recovery_type == NFS_LOCK_RECLAIM)
5006 data->arg.reclaim = NFS_LOCK_RECLAIM;
5007 nfs4_set_sequence_privileged(&data->arg.seq_args);
5009 task = rpc_run_task(&task_setup_data);
5011 return PTR_ERR(task);
5012 ret = nfs4_wait_for_completion_rpc_task(task);
5014 ret = data->rpc_status;
5016 nfs4_handle_setlk_error(data->server, data->lsp,
5017 data->arg.new_lock_owner, ret);
5019 data->cancelled = 1;
5021 dprintk("%s: done, ret = %d!\n", __func__, ret);
5025 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5027 struct nfs_server *server = NFS_SERVER(state->inode);
5028 struct nfs4_exception exception = {
5029 .inode = state->inode,
5034 /* Cache the lock if possible... */
5035 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5037 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
5038 if (err != -NFS4ERR_DELAY)
5040 nfs4_handle_exception(server, err, &exception);
5041 } while (exception.retry);
5045 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5047 struct nfs_server *server = NFS_SERVER(state->inode);
5048 struct nfs4_exception exception = {
5049 .inode = state->inode,
5053 err = nfs4_set_lock_state(state, request);
5057 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5059 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
5063 case -NFS4ERR_GRACE:
5064 case -NFS4ERR_DELAY:
5065 nfs4_handle_exception(server, err, &exception);
5068 } while (exception.retry);
5073 #if defined(CONFIG_NFS_V4_1)
5075 * nfs41_check_expired_locks - possibly free a lock stateid
5077 * @state: NFSv4 state for an inode
5079 * Returns NFS_OK if recovery for this stateid is now finished.
5080 * Otherwise a negative NFS4ERR value is returned.
5082 static int nfs41_check_expired_locks(struct nfs4_state *state)
5084 int status, ret = -NFS4ERR_BAD_STATEID;
5085 struct nfs4_lock_state *lsp;
5086 struct nfs_server *server = NFS_SERVER(state->inode);
5088 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
5089 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
5090 status = nfs41_test_stateid(server, &lsp->ls_stateid);
5091 if (status != NFS_OK) {
5092 /* Free the stateid unless the server
5093 * informs us the stateid is unrecognized. */
5094 if (status != -NFS4ERR_BAD_STATEID)
5095 nfs41_free_stateid(server,
5097 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5106 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5108 int status = NFS_OK;
5110 if (test_bit(LK_STATE_IN_USE, &state->flags))
5111 status = nfs41_check_expired_locks(state);
5112 if (status != NFS_OK)
5113 status = nfs4_lock_expired(state, request);
5118 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5120 struct nfs4_state_owner *sp = state->owner;
5121 struct nfs_inode *nfsi = NFS_I(state->inode);
5122 unsigned char fl_flags = request->fl_flags;
5124 int status = -ENOLCK;
5126 if ((fl_flags & FL_POSIX) &&
5127 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5129 /* Is this a delegated open? */
5130 status = nfs4_set_lock_state(state, request);
5133 request->fl_flags |= FL_ACCESS;
5134 status = do_vfs_lock(request->fl_file, request);
5137 down_read(&nfsi->rwsem);
5138 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
5139 /* Yes: cache locks! */
5140 /* ...but avoid races with delegation recall... */
5141 request->fl_flags = fl_flags & ~FL_SLEEP;
5142 status = do_vfs_lock(request->fl_file, request);
5145 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5146 up_read(&nfsi->rwsem);
5147 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
5150 down_read(&nfsi->rwsem);
5151 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5152 status = -NFS4ERR_DELAY;
5155 /* Note: we always want to sleep here! */
5156 request->fl_flags = fl_flags | FL_SLEEP;
5157 if (do_vfs_lock(request->fl_file, request) < 0)
5158 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5159 "manager!\n", __func__);
5161 up_read(&nfsi->rwsem);
5163 request->fl_flags = fl_flags;
5167 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5169 struct nfs4_exception exception = {
5171 .inode = state->inode,
5176 err = _nfs4_proc_setlk(state, cmd, request);
5177 if (err == -NFS4ERR_DENIED)
5179 err = nfs4_handle_exception(NFS_SERVER(state->inode),
5181 } while (exception.retry);
5186 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5188 struct nfs_open_context *ctx;
5189 struct nfs4_state *state;
5190 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5193 /* verify open state */
5194 ctx = nfs_file_open_context(filp);
5197 if (request->fl_start < 0 || request->fl_end < 0)
5200 if (IS_GETLK(cmd)) {
5202 return nfs4_proc_getlk(state, F_GETLK, request);
5206 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5209 if (request->fl_type == F_UNLCK) {
5211 return nfs4_proc_unlck(state, cmd, request);
5218 * Don't rely on the VFS having checked the file open mode,
5219 * since it won't do this for flock() locks.
5221 switch (request->fl_type) {
5223 if (!(filp->f_mode & FMODE_READ))
5227 if (!(filp->f_mode & FMODE_WRITE))
5232 status = nfs4_proc_setlk(state, cmd, request);
5233 if ((status != -EAGAIN) || IS_SETLK(cmd))
5235 timeout = nfs4_set_lock_task_retry(timeout);
5236 status = -ERESTARTSYS;
5239 } while(status < 0);
5243 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
5245 struct nfs_server *server = NFS_SERVER(state->inode);
5248 err = nfs4_set_lock_state(state, fl);
5251 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
5252 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
5255 struct nfs_release_lockowner_data {
5256 struct nfs4_lock_state *lsp;
5257 struct nfs_server *server;
5258 struct nfs_release_lockowner_args args;
5261 static void nfs4_release_lockowner_release(void *calldata)
5263 struct nfs_release_lockowner_data *data = calldata;
5264 nfs4_free_lock_state(data->server, data->lsp);
5268 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
5269 .rpc_release = nfs4_release_lockowner_release,
5272 static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
5274 struct nfs_release_lockowner_data *data;
5275 struct rpc_message msg = {
5276 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5279 if (server->nfs_client->cl_mvops->minor_version != 0)
5281 data = kmalloc(sizeof(*data), GFP_NOFS);
5285 data->server = server;
5286 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5287 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5288 data->args.lock_owner.s_dev = server->s_dev;
5289 msg.rpc_argp = &data->args;
5290 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5294 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5296 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5297 const void *buf, size_t buflen,
5298 int flags, int type)
5300 if (strcmp(key, "") != 0)
5303 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
5306 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5307 void *buf, size_t buflen, int type)
5309 if (strcmp(key, "") != 0)
5312 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
5315 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5316 size_t list_len, const char *name,
5317 size_t name_len, int type)
5319 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
5321 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5324 if (list && len <= list_len)
5325 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
5330 * nfs_fhget will use either the mounted_on_fileid or the fileid
5332 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5334 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5335 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5336 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
5337 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
5340 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
5341 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
5342 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5346 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5347 const struct qstr *name,
5348 struct nfs4_fs_locations *fs_locations,
5351 struct nfs_server *server = NFS_SERVER(dir);
5353 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
5355 struct nfs4_fs_locations_arg args = {
5356 .dir_fh = NFS_FH(dir),
5361 struct nfs4_fs_locations_res res = {
5362 .fs_locations = fs_locations,
5364 struct rpc_message msg = {
5365 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5371 dprintk("%s: start\n", __func__);
5373 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5374 * is not supported */
5375 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5376 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5378 bitmask[0] |= FATTR4_WORD0_FILEID;
5380 nfs_fattr_init(&fs_locations->fattr);
5381 fs_locations->server = server;
5382 fs_locations->nlocations = 0;
5383 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
5384 dprintk("%s: returned status = %d\n", __func__, status);
5388 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5389 const struct qstr *name,
5390 struct nfs4_fs_locations *fs_locations,
5393 struct nfs4_exception exception = { };
5396 err = nfs4_handle_exception(NFS_SERVER(dir),
5397 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
5399 } while (exception.retry);
5403 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5406 struct nfs4_secinfo_arg args = {
5407 .dir_fh = NFS_FH(dir),
5410 struct nfs4_secinfo_res res = {
5413 struct rpc_message msg = {
5414 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5419 dprintk("NFS call secinfo %s\n", name->name);
5420 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5421 dprintk("NFS reply secinfo: %d\n", status);
5425 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5426 struct nfs4_secinfo_flavors *flavors)
5428 struct nfs4_exception exception = { };
5431 err = nfs4_handle_exception(NFS_SERVER(dir),
5432 _nfs4_proc_secinfo(dir, name, flavors),
5434 } while (exception.retry);
5438 #ifdef CONFIG_NFS_V4_1
5440 * Check the exchange flags returned by the server for invalid flags, having
5441 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5444 static int nfs4_check_cl_exchange_flags(u32 flags)
5446 if (flags & ~EXCHGID4_FLAG_MASK_R)
5448 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5449 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5451 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5455 return -NFS4ERR_INVAL;
5459 nfs41_same_server_scope(struct nfs41_server_scope *a,
5460 struct nfs41_server_scope *b)
5462 if (a->server_scope_sz == b->server_scope_sz &&
5463 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5470 * nfs4_proc_bind_conn_to_session()
5472 * The 4.1 client currently uses the same TCP connection for the
5473 * fore and backchannel.
5475 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
5478 struct nfs41_bind_conn_to_session_res res;
5479 struct rpc_message msg = {
5481 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5487 dprintk("--> %s\n", __func__);
5489 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5490 if (unlikely(res.session == NULL)) {
5495 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5497 if (memcmp(res.session->sess_id.data,
5498 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5499 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5503 if (res.dir != NFS4_CDFS4_BOTH) {
5504 dprintk("NFS: %s: Unexpected direction from server\n",
5509 if (res.use_conn_in_rdma_mode) {
5510 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5519 dprintk("<-- %s status= %d\n", __func__, status);
5524 * nfs4_proc_exchange_id()
5526 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5528 * Since the clientid has expired, all compounds using sessions
5529 * associated with the stale clientid will be returning
5530 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5531 * be in some phase of session reset.
5533 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
5535 nfs4_verifier verifier;
5536 struct nfs41_exchange_id_args args = {
5537 .verifier = &verifier,
5539 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
5541 struct nfs41_exchange_id_res res = {
5545 struct rpc_message msg = {
5546 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5552 nfs4_init_boot_verifier(clp, &verifier);
5553 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5555 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5556 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5557 args.id_len, args.id);
5559 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
5561 if (unlikely(res.server_owner == NULL)) {
5566 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
5568 if (unlikely(res.server_scope == NULL)) {
5570 goto out_server_owner;
5573 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
5574 if (unlikely(res.impl_id == NULL)) {
5576 goto out_server_scope;
5579 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5581 status = nfs4_check_cl_exchange_flags(res.flags);
5584 clp->cl_clientid = res.clientid;
5585 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5586 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5587 clp->cl_seqid = res.seqid;
5589 kfree(clp->cl_serverowner);
5590 clp->cl_serverowner = res.server_owner;
5591 res.server_owner = NULL;
5593 /* use the most recent implementation id */
5594 kfree(clp->cl_implid);
5595 clp->cl_implid = res.impl_id;
5597 if (clp->cl_serverscope != NULL &&
5598 !nfs41_same_server_scope(clp->cl_serverscope,
5599 res.server_scope)) {
5600 dprintk("%s: server_scope mismatch detected\n",
5602 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
5603 kfree(clp->cl_serverscope);
5604 clp->cl_serverscope = NULL;
5607 if (clp->cl_serverscope == NULL) {
5608 clp->cl_serverscope = res.server_scope;
5615 kfree(res.server_owner);
5617 kfree(res.server_scope);
5619 if (clp->cl_implid != NULL)
5620 dprintk("NFS reply exchange_id: Server Implementation ID: "
5621 "domain: %s, name: %s, date: %llu,%u\n",
5622 clp->cl_implid->domain, clp->cl_implid->name,
5623 clp->cl_implid->date.seconds,
5624 clp->cl_implid->date.nseconds);
5625 dprintk("NFS reply exchange_id: %d\n", status);
5629 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5630 struct rpc_cred *cred)
5632 struct rpc_message msg = {
5633 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5639 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5641 dprintk("NFS: Got error %d from the server %s on "
5642 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5646 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5647 struct rpc_cred *cred)
5652 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5653 ret = _nfs4_proc_destroy_clientid(clp, cred);
5655 case -NFS4ERR_DELAY:
5656 case -NFS4ERR_CLIENTID_BUSY:
5666 int nfs4_destroy_clientid(struct nfs_client *clp)
5668 struct rpc_cred *cred;
5671 if (clp->cl_mvops->minor_version < 1)
5673 if (clp->cl_exchange_flags == 0)
5675 if (clp->cl_preserve_clid)
5677 cred = nfs4_get_exchange_id_cred(clp);
5678 ret = nfs4_proc_destroy_clientid(clp, cred);
5683 case -NFS4ERR_STALE_CLIENTID:
5684 clp->cl_exchange_flags = 0;
5690 struct nfs4_get_lease_time_data {
5691 struct nfs4_get_lease_time_args *args;
5692 struct nfs4_get_lease_time_res *res;
5693 struct nfs_client *clp;
5696 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5699 struct nfs4_get_lease_time_data *data =
5700 (struct nfs4_get_lease_time_data *)calldata;
5702 dprintk("--> %s\n", __func__);
5703 /* just setup sequence, do not trigger session recovery
5704 since we're invoked within one */
5705 nfs41_setup_sequence(data->clp->cl_session,
5706 &data->args->la_seq_args,
5707 &data->res->lr_seq_res,
5709 dprintk("<-- %s\n", __func__);
5713 * Called from nfs4_state_manager thread for session setup, so don't recover
5714 * from sequence operation or clientid errors.
5716 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5718 struct nfs4_get_lease_time_data *data =
5719 (struct nfs4_get_lease_time_data *)calldata;
5721 dprintk("--> %s\n", __func__);
5722 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5724 switch (task->tk_status) {
5725 case -NFS4ERR_DELAY:
5726 case -NFS4ERR_GRACE:
5727 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5728 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5729 task->tk_status = 0;
5731 case -NFS4ERR_RETRY_UNCACHED_REP:
5732 rpc_restart_call_prepare(task);
5735 dprintk("<-- %s\n", __func__);
5738 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
5739 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5740 .rpc_call_done = nfs4_get_lease_time_done,
5743 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5745 struct rpc_task *task;
5746 struct nfs4_get_lease_time_args args;
5747 struct nfs4_get_lease_time_res res = {
5748 .lr_fsinfo = fsinfo,
5750 struct nfs4_get_lease_time_data data = {
5755 struct rpc_message msg = {
5756 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5760 struct rpc_task_setup task_setup = {
5761 .rpc_client = clp->cl_rpcclient,
5762 .rpc_message = &msg,
5763 .callback_ops = &nfs4_get_lease_time_ops,
5764 .callback_data = &data,
5765 .flags = RPC_TASK_TIMEOUT,
5769 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
5770 nfs4_set_sequence_privileged(&args.la_seq_args);
5771 dprintk("--> %s\n", __func__);
5772 task = rpc_run_task(&task_setup);
5775 status = PTR_ERR(task);
5777 status = task->tk_status;
5780 dprintk("<-- %s return %d\n", __func__, status);
5786 * Initialize the values to be used by the client in CREATE_SESSION
5787 * If nfs4_init_session set the fore channel request and response sizes,
5790 * Set the back channel max_resp_sz_cached to zero to force the client to
5791 * always set csa_cachethis to FALSE because the current implementation
5792 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5794 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5796 struct nfs4_session *session = args->client->cl_session;
5797 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5798 mxresp_sz = session->fc_target_max_resp_sz;
5801 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5803 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5804 /* Fore channel attributes */
5805 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5806 args->fc_attrs.max_resp_sz = mxresp_sz;
5807 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5808 args->fc_attrs.max_reqs = max_session_slots;
5810 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5811 "max_ops=%u max_reqs=%u\n",
5813 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5814 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5816 /* Back channel attributes */
5817 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5818 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5819 args->bc_attrs.max_resp_sz_cached = 0;
5820 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5821 args->bc_attrs.max_reqs = 1;
5823 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5824 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5826 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5827 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5828 args->bc_attrs.max_reqs);
5831 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5833 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5834 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5836 if (rcvd->max_resp_sz > sent->max_resp_sz)
5839 * Our requested max_ops is the minimum we need; we're not
5840 * prepared to break up compounds into smaller pieces than that.
5841 * So, no point even trying to continue if the server won't
5844 if (rcvd->max_ops < sent->max_ops)
5846 if (rcvd->max_reqs == 0)
5848 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5849 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
5853 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5855 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5856 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5858 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5860 if (rcvd->max_resp_sz < sent->max_resp_sz)
5862 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5864 /* These would render the backchannel useless: */
5865 if (rcvd->max_ops != sent->max_ops)
5867 if (rcvd->max_reqs != sent->max_reqs)
5872 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5873 struct nfs4_session *session)
5877 ret = nfs4_verify_fore_channel_attrs(args, session);
5880 return nfs4_verify_back_channel_attrs(args, session);
5883 static int _nfs4_proc_create_session(struct nfs_client *clp,
5884 struct rpc_cred *cred)
5886 struct nfs4_session *session = clp->cl_session;
5887 struct nfs41_create_session_args args = {
5889 .cb_program = NFS4_CALLBACK,
5891 struct nfs41_create_session_res res = {
5894 struct rpc_message msg = {
5895 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5902 nfs4_init_channel_attrs(&args);
5903 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5905 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5908 /* Verify the session's negotiated channel_attrs values */
5909 status = nfs4_verify_channel_attrs(&args, session);
5910 /* Increment the clientid slot sequence id */
5918 * Issues a CREATE_SESSION operation to the server.
5919 * It is the responsibility of the caller to verify the session is
5920 * expired before calling this routine.
5922 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
5926 struct nfs4_session *session = clp->cl_session;
5928 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5930 status = _nfs4_proc_create_session(clp, cred);
5934 /* Init or reset the session slot tables */
5935 status = nfs4_setup_session_slot_tables(session);
5936 dprintk("slot table setup returned %d\n", status);
5940 ptr = (unsigned *)&session->sess_id.data[0];
5941 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5942 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5944 dprintk("<-- %s\n", __func__);
5949 * Issue the over-the-wire RPC DESTROY_SESSION.
5950 * The caller must serialize access to this routine.
5952 int nfs4_proc_destroy_session(struct nfs4_session *session,
5953 struct rpc_cred *cred)
5955 struct rpc_message msg = {
5956 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5957 .rpc_argp = session,
5962 dprintk("--> nfs4_proc_destroy_session\n");
5964 /* session is still being setup */
5965 if (session->clp->cl_cons_state != NFS_CS_READY)
5968 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5971 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
5972 "Session has been destroyed regardless...\n", status);
5974 dprintk("<-- nfs4_proc_destroy_session\n");
5979 * Renew the cl_session lease.
5981 struct nfs4_sequence_data {
5982 struct nfs_client *clp;
5983 struct nfs4_sequence_args args;
5984 struct nfs4_sequence_res res;
5987 static void nfs41_sequence_release(void *data)
5989 struct nfs4_sequence_data *calldata = data;
5990 struct nfs_client *clp = calldata->clp;
5992 if (atomic_read(&clp->cl_count) > 1)
5993 nfs4_schedule_state_renewal(clp);
5994 nfs_put_client(clp);
5998 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6000 switch(task->tk_status) {
6001 case -NFS4ERR_DELAY:
6002 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6005 nfs4_schedule_lease_recovery(clp);
6010 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
6012 struct nfs4_sequence_data *calldata = data;
6013 struct nfs_client *clp = calldata->clp;
6015 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
6018 if (task->tk_status < 0) {
6019 dprintk("%s ERROR %d\n", __func__, task->tk_status);
6020 if (atomic_read(&clp->cl_count) == 1)
6023 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
6024 rpc_restart_call_prepare(task);
6028 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
6030 dprintk("<-- %s\n", __func__);
6033 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6035 struct nfs4_sequence_data *calldata = data;
6036 struct nfs_client *clp = calldata->clp;
6037 struct nfs4_sequence_args *args;
6038 struct nfs4_sequence_res *res;
6040 args = task->tk_msg.rpc_argp;
6041 res = task->tk_msg.rpc_resp;
6043 nfs41_setup_sequence(clp->cl_session, args, res, task);
6046 static const struct rpc_call_ops nfs41_sequence_ops = {
6047 .rpc_call_done = nfs41_sequence_call_done,
6048 .rpc_call_prepare = nfs41_sequence_prepare,
6049 .rpc_release = nfs41_sequence_release,
6052 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
6053 struct rpc_cred *cred,
6056 struct nfs4_sequence_data *calldata;
6057 struct rpc_message msg = {
6058 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6061 struct rpc_task_setup task_setup_data = {
6062 .rpc_client = clp->cl_rpcclient,
6063 .rpc_message = &msg,
6064 .callback_ops = &nfs41_sequence_ops,
6065 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
6068 if (!atomic_inc_not_zero(&clp->cl_count))
6069 return ERR_PTR(-EIO);
6070 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
6071 if (calldata == NULL) {
6072 nfs_put_client(clp);
6073 return ERR_PTR(-ENOMEM);
6075 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
6077 nfs4_set_sequence_privileged(&calldata->args);
6078 msg.rpc_argp = &calldata->args;
6079 msg.rpc_resp = &calldata->res;
6080 calldata->clp = clp;
6081 task_setup_data.callback_data = calldata;
6083 return rpc_run_task(&task_setup_data);
6086 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
6088 struct rpc_task *task;
6091 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6093 task = _nfs41_proc_sequence(clp, cred, false);
6095 ret = PTR_ERR(task);
6097 rpc_put_task_async(task);
6098 dprintk("<-- %s status=%d\n", __func__, ret);
6102 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6104 struct rpc_task *task;
6107 task = _nfs41_proc_sequence(clp, cred, true);
6109 ret = PTR_ERR(task);
6112 ret = rpc_wait_for_completion_task(task);
6114 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6116 if (task->tk_status == 0)
6117 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
6118 ret = task->tk_status;
6122 dprintk("<-- %s status=%d\n", __func__, ret);
6126 struct nfs4_reclaim_complete_data {
6127 struct nfs_client *clp;
6128 struct nfs41_reclaim_complete_args arg;
6129 struct nfs41_reclaim_complete_res res;
6132 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6134 struct nfs4_reclaim_complete_data *calldata = data;
6136 nfs41_setup_sequence(calldata->clp->cl_session,
6137 &calldata->arg.seq_args,
6138 &calldata->res.seq_res,
6142 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6144 switch(task->tk_status) {
6146 case -NFS4ERR_COMPLETE_ALREADY:
6147 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6149 case -NFS4ERR_DELAY:
6150 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6152 case -NFS4ERR_RETRY_UNCACHED_REP:
6155 nfs4_schedule_lease_recovery(clp);
6160 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6162 struct nfs4_reclaim_complete_data *calldata = data;
6163 struct nfs_client *clp = calldata->clp;
6164 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6166 dprintk("--> %s\n", __func__);
6167 if (!nfs41_sequence_done(task, res))
6170 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6171 rpc_restart_call_prepare(task);
6174 dprintk("<-- %s\n", __func__);
6177 static void nfs4_free_reclaim_complete_data(void *data)
6179 struct nfs4_reclaim_complete_data *calldata = data;
6184 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6185 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6186 .rpc_call_done = nfs4_reclaim_complete_done,
6187 .rpc_release = nfs4_free_reclaim_complete_data,
6191 * Issue a global reclaim complete.
6193 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6195 struct nfs4_reclaim_complete_data *calldata;
6196 struct rpc_task *task;
6197 struct rpc_message msg = {
6198 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6200 struct rpc_task_setup task_setup_data = {
6201 .rpc_client = clp->cl_rpcclient,
6202 .rpc_message = &msg,
6203 .callback_ops = &nfs4_reclaim_complete_call_ops,
6204 .flags = RPC_TASK_ASYNC,
6206 int status = -ENOMEM;
6208 dprintk("--> %s\n", __func__);
6209 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
6210 if (calldata == NULL)
6212 calldata->clp = clp;
6213 calldata->arg.one_fs = 0;
6215 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
6216 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
6217 msg.rpc_argp = &calldata->arg;
6218 msg.rpc_resp = &calldata->res;
6219 task_setup_data.callback_data = calldata;
6220 task = rpc_run_task(&task_setup_data);
6222 status = PTR_ERR(task);
6225 status = nfs4_wait_for_completion_rpc_task(task);
6227 status = task->tk_status;
6231 dprintk("<-- %s status=%d\n", __func__, status);
6236 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6238 struct nfs4_layoutget *lgp = calldata;
6239 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6240 struct nfs4_session *session = nfs4_get_session(server);
6242 dprintk("--> %s\n", __func__);
6243 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6244 * right now covering the LAYOUTGET we are about to send.
6245 * However, that is not so catastrophic, and there seems
6246 * to be no way to prevent it completely.
6248 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
6249 &lgp->res.seq_res, task))
6251 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6252 NFS_I(lgp->args.inode)->layout,
6253 lgp->args.ctx->state)) {
6254 rpc_exit(task, NFS4_OK);
6258 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6260 struct nfs4_layoutget *lgp = calldata;
6261 struct inode *inode = lgp->args.inode;
6262 struct nfs_server *server = NFS_SERVER(inode);
6263 struct pnfs_layout_hdr *lo;
6264 struct nfs4_state *state = NULL;
6265 unsigned long timeo, now, giveup;
6267 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
6269 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
6272 switch (task->tk_status) {
6276 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
6277 * (or clients) writing to the same RAID stripe
6279 case -NFS4ERR_LAYOUTTRYLATER:
6281 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
6282 * existing layout before getting a new one).
6284 case -NFS4ERR_RECALLCONFLICT:
6285 timeo = rpc_get_timeout(task->tk_client);
6286 giveup = lgp->args.timestamp + timeo;
6288 if (time_after(giveup, now)) {
6289 unsigned long delay;
6292 * - Not less then NFS4_POLL_RETRY_MIN.
6293 * - One last time a jiffie before we give up
6294 * - exponential backoff (time_now minus start_attempt)
6296 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
6297 min((giveup - now - 1),
6298 now - lgp->args.timestamp));
6300 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
6302 rpc_delay(task, delay);
6303 task->tk_status = 0;
6304 rpc_restart_call_prepare(task);
6305 goto out; /* Do not call nfs4_async_handle_error() */
6308 case -NFS4ERR_EXPIRED:
6309 case -NFS4ERR_BAD_STATEID:
6310 spin_lock(&inode->i_lock);
6311 lo = NFS_I(inode)->layout;
6312 if (!lo || list_empty(&lo->plh_segs)) {
6313 spin_unlock(&inode->i_lock);
6314 /* If the open stateid was bad, then recover it. */
6315 state = lgp->args.ctx->state;
6319 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6320 spin_unlock(&inode->i_lock);
6321 /* Mark the bad layout state as invalid, then
6322 * retry using the open stateid. */
6323 pnfs_free_lseg_list(&head);
6326 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6327 rpc_restart_call_prepare(task);
6329 dprintk("<-- %s\n", __func__);
6332 static size_t max_response_pages(struct nfs_server *server)
6334 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6335 return nfs_page_array_len(0, max_resp_sz);
6338 static void nfs4_free_pages(struct page **pages, size_t size)
6345 for (i = 0; i < size; i++) {
6348 __free_page(pages[i]);
6353 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6355 struct page **pages;
6358 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6360 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6364 for (i = 0; i < size; i++) {
6365 pages[i] = alloc_page(gfp_flags);
6367 dprintk("%s: failed to allocate page\n", __func__);
6368 nfs4_free_pages(pages, size);
6376 static void nfs4_layoutget_release(void *calldata)
6378 struct nfs4_layoutget *lgp = calldata;
6379 struct inode *inode = lgp->args.inode;
6380 struct nfs_server *server = NFS_SERVER(inode);
6381 size_t max_pages = max_response_pages(server);
6383 dprintk("--> %s\n", __func__);
6384 nfs4_free_pages(lgp->args.layout.pages, max_pages);
6385 pnfs_put_layout_hdr(NFS_I(inode)->layout);
6386 put_nfs_open_context(lgp->args.ctx);
6388 dprintk("<-- %s\n", __func__);
6391 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6392 .rpc_call_prepare = nfs4_layoutget_prepare,
6393 .rpc_call_done = nfs4_layoutget_done,
6394 .rpc_release = nfs4_layoutget_release,
6397 struct pnfs_layout_segment *
6398 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
6400 struct inode *inode = lgp->args.inode;
6401 struct nfs_server *server = NFS_SERVER(inode);
6402 size_t max_pages = max_response_pages(server);
6403 struct rpc_task *task;
6404 struct rpc_message msg = {
6405 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6406 .rpc_argp = &lgp->args,
6407 .rpc_resp = &lgp->res,
6409 struct rpc_task_setup task_setup_data = {
6410 .rpc_client = server->client,
6411 .rpc_message = &msg,
6412 .callback_ops = &nfs4_layoutget_call_ops,
6413 .callback_data = lgp,
6414 .flags = RPC_TASK_ASYNC,
6416 struct pnfs_layout_segment *lseg = NULL;
6419 dprintk("--> %s\n", __func__);
6421 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6422 if (!lgp->args.layout.pages) {
6423 nfs4_layoutget_release(lgp);
6424 return ERR_PTR(-ENOMEM);
6426 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
6427 lgp->args.timestamp = jiffies;
6429 lgp->res.layoutp = &lgp->args.layout;
6430 lgp->res.seq_res.sr_slot = NULL;
6431 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
6433 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6434 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6436 task = rpc_run_task(&task_setup_data);
6438 return ERR_CAST(task);
6439 status = nfs4_wait_for_completion_rpc_task(task);
6441 status = task->tk_status;
6442 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6443 if (status == 0 && lgp->res.layoutp->len)
6444 lseg = pnfs_layout_process(lgp);
6446 dprintk("<-- %s status=%d\n", __func__, status);
6448 return ERR_PTR(status);
6453 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6455 struct nfs4_layoutreturn *lrp = calldata;
6457 dprintk("--> %s\n", __func__);
6458 nfs41_setup_sequence(lrp->clp->cl_session,
6459 &lrp->args.seq_args,
6464 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6466 struct nfs4_layoutreturn *lrp = calldata;
6467 struct nfs_server *server;
6469 dprintk("--> %s\n", __func__);
6471 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
6474 server = NFS_SERVER(lrp->args.inode);
6475 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6476 rpc_restart_call_prepare(task);
6479 dprintk("<-- %s\n", __func__);
6482 static void nfs4_layoutreturn_release(void *calldata)
6484 struct nfs4_layoutreturn *lrp = calldata;
6485 struct pnfs_layout_hdr *lo = lrp->args.layout;
6487 dprintk("--> %s\n", __func__);
6488 spin_lock(&lo->plh_inode->i_lock);
6489 if (lrp->res.lrs_present)
6490 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6491 lo->plh_block_lgets--;
6492 spin_unlock(&lo->plh_inode->i_lock);
6493 pnfs_put_layout_hdr(lrp->args.layout);
6495 dprintk("<-- %s\n", __func__);
6498 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6499 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6500 .rpc_call_done = nfs4_layoutreturn_done,
6501 .rpc_release = nfs4_layoutreturn_release,
6504 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6506 struct rpc_task *task;
6507 struct rpc_message msg = {
6508 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6509 .rpc_argp = &lrp->args,
6510 .rpc_resp = &lrp->res,
6512 struct rpc_task_setup task_setup_data = {
6513 .rpc_client = lrp->clp->cl_rpcclient,
6514 .rpc_message = &msg,
6515 .callback_ops = &nfs4_layoutreturn_call_ops,
6516 .callback_data = lrp,
6520 dprintk("--> %s\n", __func__);
6521 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
6522 task = rpc_run_task(&task_setup_data);
6524 return PTR_ERR(task);
6525 status = task->tk_status;
6526 dprintk("<-- %s status=%d\n", __func__, status);
6532 * Retrieve the list of Data Server devices from the MDS.
6534 static int _nfs4_getdevicelist(struct nfs_server *server,
6535 const struct nfs_fh *fh,
6536 struct pnfs_devicelist *devlist)
6538 struct nfs4_getdevicelist_args args = {
6540 .layoutclass = server->pnfs_curr_ld->id,
6542 struct nfs4_getdevicelist_res res = {
6545 struct rpc_message msg = {
6546 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6552 dprintk("--> %s\n", __func__);
6553 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6555 dprintk("<-- %s status=%d\n", __func__, status);
6559 int nfs4_proc_getdevicelist(struct nfs_server *server,
6560 const struct nfs_fh *fh,
6561 struct pnfs_devicelist *devlist)
6563 struct nfs4_exception exception = { };
6567 err = nfs4_handle_exception(server,
6568 _nfs4_getdevicelist(server, fh, devlist),
6570 } while (exception.retry);
6572 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6573 err, devlist->num_devs);
6577 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6580 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6582 struct nfs4_getdeviceinfo_args args = {
6585 struct nfs4_getdeviceinfo_res res = {
6588 struct rpc_message msg = {
6589 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6595 dprintk("--> %s\n", __func__);
6596 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6597 dprintk("<-- %s status=%d\n", __func__, status);
6602 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6604 struct nfs4_exception exception = { };
6608 err = nfs4_handle_exception(server,
6609 _nfs4_proc_getdeviceinfo(server, pdev),
6611 } while (exception.retry);
6614 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6616 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6618 struct nfs4_layoutcommit_data *data = calldata;
6619 struct nfs_server *server = NFS_SERVER(data->args.inode);
6620 struct nfs4_session *session = nfs4_get_session(server);
6622 nfs41_setup_sequence(session,
6623 &data->args.seq_args,
6629 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6631 struct nfs4_layoutcommit_data *data = calldata;
6632 struct nfs_server *server = NFS_SERVER(data->args.inode);
6634 if (!nfs41_sequence_done(task, &data->res.seq_res))
6637 switch (task->tk_status) { /* Just ignore these failures */
6638 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6639 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6640 case -NFS4ERR_BADLAYOUT: /* no layout */
6641 case -NFS4ERR_GRACE: /* loca_recalim always false */
6642 task->tk_status = 0;
6645 nfs_post_op_update_inode_force_wcc(data->args.inode,
6649 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6650 rpc_restart_call_prepare(task);
6656 static void nfs4_layoutcommit_release(void *calldata)
6658 struct nfs4_layoutcommit_data *data = calldata;
6660 pnfs_cleanup_layoutcommit(data);
6661 put_rpccred(data->cred);
6665 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6666 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6667 .rpc_call_done = nfs4_layoutcommit_done,
6668 .rpc_release = nfs4_layoutcommit_release,
6672 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
6674 struct rpc_message msg = {
6675 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6676 .rpc_argp = &data->args,
6677 .rpc_resp = &data->res,
6678 .rpc_cred = data->cred,
6680 struct rpc_task_setup task_setup_data = {
6681 .task = &data->task,
6682 .rpc_client = NFS_CLIENT(data->args.inode),
6683 .rpc_message = &msg,
6684 .callback_ops = &nfs4_layoutcommit_ops,
6685 .callback_data = data,
6686 .flags = RPC_TASK_ASYNC,
6688 struct rpc_task *task;
6691 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6692 "lbw: %llu inode %lu\n",
6693 data->task.tk_pid, sync,
6694 data->args.lastbytewritten,
6695 data->args.inode->i_ino);
6697 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
6698 task = rpc_run_task(&task_setup_data);
6700 return PTR_ERR(task);
6703 status = nfs4_wait_for_completion_rpc_task(task);
6706 status = task->tk_status;
6708 dprintk("%s: status %d\n", __func__, status);
6714 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6715 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6717 struct nfs41_secinfo_no_name_args args = {
6718 .style = SECINFO_STYLE_CURRENT_FH,
6720 struct nfs4_secinfo_res res = {
6723 struct rpc_message msg = {
6724 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6728 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6732 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6733 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6735 struct nfs4_exception exception = { };
6738 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6741 case -NFS4ERR_WRONGSEC:
6745 err = nfs4_handle_exception(server, err, &exception);
6747 } while (exception.retry);
6753 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6754 struct nfs_fsinfo *info)
6758 rpc_authflavor_t flavor;
6759 struct nfs4_secinfo_flavors *flavors;
6761 page = alloc_page(GFP_KERNEL);
6767 flavors = page_address(page);
6768 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6771 * Fall back on "guess and check" method if
6772 * the server doesn't support SECINFO_NO_NAME
6774 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
6775 err = nfs4_find_root_sec(server, fhandle, info);
6781 flavor = nfs_find_best_sec(flavors);
6783 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6793 static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6796 struct nfs41_test_stateid_args args = {
6799 struct nfs41_test_stateid_res res;
6800 struct rpc_message msg = {
6801 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6806 dprintk("NFS call test_stateid %p\n", stateid);
6807 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6808 nfs4_set_sequence_privileged(&args.seq_args);
6809 status = nfs4_call_sync_sequence(server->client, server, &msg,
6810 &args.seq_args, &res.seq_res);
6811 if (status != NFS_OK) {
6812 dprintk("NFS reply test_stateid: failed, %d\n", status);
6815 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
6820 * nfs41_test_stateid - perform a TEST_STATEID operation
6822 * @server: server / transport on which to perform the operation
6823 * @stateid: state ID to test
6825 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6826 * Otherwise a negative NFS4ERR value is returned if the operation
6827 * failed or the state ID is not currently valid.
6829 static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6831 struct nfs4_exception exception = { };
6834 err = _nfs41_test_stateid(server, stateid);
6835 if (err != -NFS4ERR_DELAY)
6837 nfs4_handle_exception(server, err, &exception);
6838 } while (exception.retry);
6842 struct nfs_free_stateid_data {
6843 struct nfs_server *server;
6844 struct nfs41_free_stateid_args args;
6845 struct nfs41_free_stateid_res res;
6848 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
6850 struct nfs_free_stateid_data *data = calldata;
6851 nfs41_setup_sequence(nfs4_get_session(data->server),
6852 &data->args.seq_args,
6857 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
6859 struct nfs_free_stateid_data *data = calldata;
6861 nfs41_sequence_done(task, &data->res.seq_res);
6863 switch (task->tk_status) {
6864 case -NFS4ERR_DELAY:
6865 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
6866 rpc_restart_call_prepare(task);
6870 static void nfs41_free_stateid_release(void *calldata)
6875 const struct rpc_call_ops nfs41_free_stateid_ops = {
6876 .rpc_call_prepare = nfs41_free_stateid_prepare,
6877 .rpc_call_done = nfs41_free_stateid_done,
6878 .rpc_release = nfs41_free_stateid_release,
6881 static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
6882 nfs4_stateid *stateid,
6885 struct rpc_message msg = {
6886 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6888 struct rpc_task_setup task_setup = {
6889 .rpc_client = server->client,
6890 .rpc_message = &msg,
6891 .callback_ops = &nfs41_free_stateid_ops,
6892 .flags = RPC_TASK_ASYNC,
6894 struct nfs_free_stateid_data *data;
6896 dprintk("NFS call free_stateid %p\n", stateid);
6897 data = kmalloc(sizeof(*data), GFP_NOFS);
6899 return ERR_PTR(-ENOMEM);
6900 data->server = server;
6901 nfs4_stateid_copy(&data->args.stateid, stateid);
6903 task_setup.callback_data = data;
6905 msg.rpc_argp = &data->args;
6906 msg.rpc_resp = &data->res;
6907 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
6909 nfs4_set_sequence_privileged(&data->args.seq_args);
6911 return rpc_run_task(&task_setup);
6915 * nfs41_free_stateid - perform a FREE_STATEID operation
6917 * @server: server / transport on which to perform the operation
6918 * @stateid: state ID to release
6920 * Returns NFS_OK if the server freed "stateid". Otherwise a
6921 * negative NFS4ERR value is returned.
6923 static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6925 struct rpc_task *task;
6928 task = _nfs41_free_stateid(server, stateid, true);
6930 return PTR_ERR(task);
6931 ret = rpc_wait_for_completion_task(task);
6933 ret = task->tk_status;
6938 static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
6940 struct rpc_task *task;
6942 task = _nfs41_free_stateid(server, &lsp->ls_stateid, false);
6943 nfs4_free_lock_state(server, lsp);
6945 return PTR_ERR(task);
6950 static bool nfs41_match_stateid(const nfs4_stateid *s1,
6951 const nfs4_stateid *s2)
6953 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
6956 if (s1->seqid == s2->seqid)
6958 if (s1->seqid == 0 || s2->seqid == 0)
6964 #endif /* CONFIG_NFS_V4_1 */
6966 static bool nfs4_match_stateid(const nfs4_stateid *s1,
6967 const nfs4_stateid *s2)
6969 return nfs4_stateid_match(s1, s2);
6973 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
6974 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6975 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6976 .recover_open = nfs4_open_reclaim,
6977 .recover_lock = nfs4_lock_reclaim,
6978 .establish_clid = nfs4_init_clientid,
6979 .get_clid_cred = nfs4_get_setclientid_cred,
6980 .detect_trunking = nfs40_discover_server_trunking,
6983 #if defined(CONFIG_NFS_V4_1)
6984 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6985 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6986 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6987 .recover_open = nfs4_open_reclaim,
6988 .recover_lock = nfs4_lock_reclaim,
6989 .establish_clid = nfs41_init_clientid,
6990 .get_clid_cred = nfs4_get_exchange_id_cred,
6991 .reclaim_complete = nfs41_proc_reclaim_complete,
6992 .detect_trunking = nfs41_discover_server_trunking,
6994 #endif /* CONFIG_NFS_V4_1 */
6996 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6997 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6998 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6999 .recover_open = nfs40_open_expired,
7000 .recover_lock = nfs4_lock_expired,
7001 .establish_clid = nfs4_init_clientid,
7002 .get_clid_cred = nfs4_get_setclientid_cred,
7005 #if defined(CONFIG_NFS_V4_1)
7006 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7007 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
7008 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
7009 .recover_open = nfs41_open_expired,
7010 .recover_lock = nfs41_lock_expired,
7011 .establish_clid = nfs41_init_clientid,
7012 .get_clid_cred = nfs4_get_exchange_id_cred,
7014 #endif /* CONFIG_NFS_V4_1 */
7016 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
7017 .sched_state_renewal = nfs4_proc_async_renew,
7018 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
7019 .renew_lease = nfs4_proc_renew,
7022 #if defined(CONFIG_NFS_V4_1)
7023 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
7024 .sched_state_renewal = nfs41_proc_async_sequence,
7025 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
7026 .renew_lease = nfs4_proc_sequence,
7030 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
7032 .init_caps = NFS_CAP_READDIRPLUS
7033 | NFS_CAP_ATOMIC_OPEN
7034 | NFS_CAP_CHANGE_ATTR
7035 | NFS_CAP_POSIX_LOCK,
7036 .call_sync = _nfs4_call_sync,
7037 .match_stateid = nfs4_match_stateid,
7038 .find_root_sec = nfs4_find_root_sec,
7039 .free_lock_state = nfs4_release_lockowner,
7040 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
7041 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
7042 .state_renewal_ops = &nfs40_state_renewal_ops,
7045 #if defined(CONFIG_NFS_V4_1)
7046 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
7048 .init_caps = NFS_CAP_READDIRPLUS
7049 | NFS_CAP_ATOMIC_OPEN
7050 | NFS_CAP_CHANGE_ATTR
7051 | NFS_CAP_POSIX_LOCK
7052 | NFS_CAP_STATEID_NFSV41
7053 | NFS_CAP_ATOMIC_OPEN_V1,
7054 .call_sync = nfs4_call_sync_sequence,
7055 .match_stateid = nfs41_match_stateid,
7056 .find_root_sec = nfs41_find_root_sec,
7057 .free_lock_state = nfs41_free_lock_state,
7058 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7059 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7060 .state_renewal_ops = &nfs41_state_renewal_ops,
7064 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
7065 [0] = &nfs_v4_0_minor_ops,
7066 #if defined(CONFIG_NFS_V4_1)
7067 [1] = &nfs_v4_1_minor_ops,
7071 const struct inode_operations nfs4_dir_inode_operations = {
7072 .create = nfs_create,
7073 .lookup = nfs_lookup,
7074 .atomic_open = nfs_atomic_open,
7076 .unlink = nfs_unlink,
7077 .symlink = nfs_symlink,
7081 .rename = nfs_rename,
7082 .permission = nfs_permission,
7083 .getattr = nfs_getattr,
7084 .setattr = nfs_setattr,
7085 .getxattr = generic_getxattr,
7086 .setxattr = generic_setxattr,
7087 .listxattr = generic_listxattr,
7088 .removexattr = generic_removexattr,
7091 static const struct inode_operations nfs4_file_inode_operations = {
7092 .permission = nfs_permission,
7093 .getattr = nfs_getattr,
7094 .setattr = nfs_setattr,
7095 .getxattr = generic_getxattr,
7096 .setxattr = generic_setxattr,
7097 .listxattr = generic_listxattr,
7098 .removexattr = generic_removexattr,
7101 const struct nfs_rpc_ops nfs_v4_clientops = {
7102 .version = 4, /* protocol version */
7103 .dentry_ops = &nfs4_dentry_operations,
7104 .dir_inode_ops = &nfs4_dir_inode_operations,
7105 .file_inode_ops = &nfs4_file_inode_operations,
7106 .file_ops = &nfs4_file_operations,
7107 .getroot = nfs4_proc_get_root,
7108 .submount = nfs4_submount,
7109 .try_mount = nfs4_try_mount,
7110 .getattr = nfs4_proc_getattr,
7111 .setattr = nfs4_proc_setattr,
7112 .lookup = nfs4_proc_lookup,
7113 .access = nfs4_proc_access,
7114 .readlink = nfs4_proc_readlink,
7115 .create = nfs4_proc_create,
7116 .remove = nfs4_proc_remove,
7117 .unlink_setup = nfs4_proc_unlink_setup,
7118 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
7119 .unlink_done = nfs4_proc_unlink_done,
7120 .rename = nfs4_proc_rename,
7121 .rename_setup = nfs4_proc_rename_setup,
7122 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
7123 .rename_done = nfs4_proc_rename_done,
7124 .link = nfs4_proc_link,
7125 .symlink = nfs4_proc_symlink,
7126 .mkdir = nfs4_proc_mkdir,
7127 .rmdir = nfs4_proc_remove,
7128 .readdir = nfs4_proc_readdir,
7129 .mknod = nfs4_proc_mknod,
7130 .statfs = nfs4_proc_statfs,
7131 .fsinfo = nfs4_proc_fsinfo,
7132 .pathconf = nfs4_proc_pathconf,
7133 .set_capabilities = nfs4_server_capabilities,
7134 .decode_dirent = nfs4_decode_dirent,
7135 .read_setup = nfs4_proc_read_setup,
7136 .read_pageio_init = pnfs_pageio_init_read,
7137 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
7138 .read_done = nfs4_read_done,
7139 .write_setup = nfs4_proc_write_setup,
7140 .write_pageio_init = pnfs_pageio_init_write,
7141 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
7142 .write_done = nfs4_write_done,
7143 .commit_setup = nfs4_proc_commit_setup,
7144 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
7145 .commit_done = nfs4_commit_done,
7146 .lock = nfs4_proc_lock,
7147 .clear_acl_cache = nfs4_zap_acl_attr,
7148 .close_context = nfs4_close_context,
7149 .open_context = nfs4_atomic_open,
7150 .have_delegation = nfs4_have_delegation,
7151 .return_delegation = nfs4_inode_return_delegation,
7152 .alloc_client = nfs4_alloc_client,
7153 .init_client = nfs4_init_client,
7154 .free_client = nfs4_free_client,
7155 .create_server = nfs4_create_server,
7156 .clone_server = nfs_clone_server,
7159 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7160 .prefix = XATTR_NAME_NFSV4_ACL,
7161 .list = nfs4_xattr_list_nfs4_acl,
7162 .get = nfs4_xattr_get_nfs4_acl,
7163 .set = nfs4_xattr_set_nfs4_acl,
7166 const struct xattr_handler *nfs4_xattr_handlers[] = {
7167 &nfs4_xattr_nfs4_acl_handler,