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_unsafe(*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 #if defined(CONFIG_NFS_V4_1)
1849 static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
1851 struct nfs_server *server = NFS_SERVER(state->inode);
1852 nfs4_stateid *stateid = &state->stateid;
1855 /* If a state reset has been done, test_stateid is unneeded */
1856 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1859 status = nfs41_test_stateid(server, stateid);
1860 if (status != NFS_OK) {
1861 /* Free the stateid unless the server explicitly
1862 * informs us the stateid is unrecognized. */
1863 if (status != -NFS4ERR_BAD_STATEID)
1864 nfs41_free_stateid(server, stateid);
1865 nfs_remove_bad_delegation(state->inode);
1867 write_seqlock(&state->seqlock);
1868 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1869 write_sequnlock(&state->seqlock);
1870 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1875 * nfs41_check_open_stateid - possibly free an open stateid
1877 * @state: NFSv4 state for an inode
1879 * Returns NFS_OK if recovery for this stateid is now finished.
1880 * Otherwise a negative NFS4ERR value is returned.
1882 static int nfs41_check_open_stateid(struct nfs4_state *state)
1884 struct nfs_server *server = NFS_SERVER(state->inode);
1885 nfs4_stateid *stateid = &state->open_stateid;
1888 /* If a state reset has been done, test_stateid is unneeded */
1889 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1890 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1891 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1892 return -NFS4ERR_BAD_STATEID;
1894 status = nfs41_test_stateid(server, stateid);
1895 if (status != NFS_OK) {
1896 /* Free the stateid unless the server explicitly
1897 * informs us the stateid is unrecognized. */
1898 if (status != -NFS4ERR_BAD_STATEID)
1899 nfs41_free_stateid(server, stateid);
1901 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1902 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1903 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1904 clear_bit(NFS_OPEN_STATE, &state->flags);
1909 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1913 nfs41_clear_delegation_stateid(state);
1914 status = nfs41_check_open_stateid(state);
1915 if (status != NFS_OK)
1916 status = nfs4_open_expired(sp, state);
1922 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1923 * fields corresponding to attributes that were used to store the verifier.
1924 * Make sure we clobber those fields in the later setattr call
1926 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1928 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1929 !(sattr->ia_valid & ATTR_ATIME_SET))
1930 sattr->ia_valid |= ATTR_ATIME;
1932 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1933 !(sattr->ia_valid & ATTR_MTIME_SET))
1934 sattr->ia_valid |= ATTR_MTIME;
1937 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
1940 struct nfs4_state **res)
1942 struct nfs4_state_owner *sp = opendata->owner;
1943 struct nfs_server *server = sp->so_server;
1944 struct nfs4_state *state;
1948 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
1950 ret = _nfs4_proc_open(opendata);
1954 state = nfs4_opendata_to_nfs4_state(opendata);
1955 ret = PTR_ERR(state);
1958 if (server->caps & NFS_CAP_POSIX_LOCK)
1959 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1961 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
1965 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
1966 nfs4_schedule_stateid_recovery(server, state);
1973 * Returns a referenced nfs4_state
1975 static int _nfs4_do_open(struct inode *dir,
1976 struct dentry *dentry,
1979 struct iattr *sattr,
1980 struct rpc_cred *cred,
1981 struct nfs4_state **res,
1982 struct nfs4_threshold **ctx_th)
1984 struct nfs4_state_owner *sp;
1985 struct nfs4_state *state = NULL;
1986 struct nfs_server *server = NFS_SERVER(dir);
1987 struct nfs4_opendata *opendata;
1988 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1991 /* Protect against reboot recovery conflicts */
1993 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1995 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1998 status = nfs4_recover_expired_lease(server);
2000 goto err_put_state_owner;
2001 if (dentry->d_inode != NULL)
2002 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
2004 if (dentry->d_inode)
2005 claim = NFS4_OPEN_CLAIM_FH;
2006 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
2008 if (opendata == NULL)
2009 goto err_put_state_owner;
2011 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2012 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2013 if (!opendata->f_attr.mdsthreshold)
2014 goto err_opendata_put;
2015 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
2017 if (dentry->d_inode != NULL)
2018 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
2020 status = _nfs4_open_and_get_state(opendata, fmode, flags, &state);
2022 goto err_opendata_put;
2024 if ((opendata->o_arg.open_flags & O_EXCL) &&
2025 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
2026 nfs4_exclusive_attrset(opendata, sattr);
2028 nfs_fattr_init(opendata->o_res.f_attr);
2029 status = nfs4_do_setattr(state->inode, cred,
2030 opendata->o_res.f_attr, sattr,
2033 nfs_setattr_update_inode(state->inode, sattr);
2034 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2037 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2038 *ctx_th = opendata->f_attr.mdsthreshold;
2040 kfree(opendata->f_attr.mdsthreshold);
2041 opendata->f_attr.mdsthreshold = NULL;
2043 nfs4_opendata_put(opendata);
2044 nfs4_put_state_owner(sp);
2048 kfree(opendata->f_attr.mdsthreshold);
2049 nfs4_opendata_put(opendata);
2050 err_put_state_owner:
2051 nfs4_put_state_owner(sp);
2058 static struct nfs4_state *nfs4_do_open(struct inode *dir,
2059 struct dentry *dentry,
2062 struct iattr *sattr,
2063 struct rpc_cred *cred,
2064 struct nfs4_threshold **ctx_th)
2066 struct nfs_server *server = NFS_SERVER(dir);
2067 struct nfs4_exception exception = { };
2068 struct nfs4_state *res;
2071 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
2073 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
2077 /* NOTE: BAD_SEQID means the server and client disagree about the
2078 * book-keeping w.r.t. state-changing operations
2079 * (OPEN/CLOSE/LOCK/LOCKU...)
2080 * It is actually a sign of a bug on the client or on the server.
2082 * If we receive a BAD_SEQID error in the particular case of
2083 * doing an OPEN, we assume that nfs_increment_open_seqid() will
2084 * have unhashed the old state_owner for us, and that we can
2085 * therefore safely retry using a new one. We should still warn
2086 * the user though...
2088 if (status == -NFS4ERR_BAD_SEQID) {
2089 pr_warn_ratelimited("NFS: v4 server %s "
2090 " returned a bad sequence-id error!\n",
2091 NFS_SERVER(dir)->nfs_client->cl_hostname);
2092 exception.retry = 1;
2096 * BAD_STATEID on OPEN means that the server cancelled our
2097 * state before it received the OPEN_CONFIRM.
2098 * Recover by retrying the request as per the discussion
2099 * on Page 181 of RFC3530.
2101 if (status == -NFS4ERR_BAD_STATEID) {
2102 exception.retry = 1;
2105 if (status == -EAGAIN) {
2106 /* We must have found a delegation */
2107 exception.retry = 1;
2110 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2112 res = ERR_PTR(nfs4_handle_exception(server,
2113 status, &exception));
2114 } while (exception.retry);
2118 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2119 struct nfs_fattr *fattr, struct iattr *sattr,
2120 struct nfs4_state *state)
2122 struct nfs_server *server = NFS_SERVER(inode);
2123 struct nfs_setattrargs arg = {
2124 .fh = NFS_FH(inode),
2127 .bitmask = server->attr_bitmask,
2129 struct nfs_setattrres res = {
2133 struct rpc_message msg = {
2134 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2139 unsigned long timestamp = jiffies;
2144 nfs_fattr_init(fattr);
2146 /* Servers should only apply open mode checks for file size changes */
2147 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2148 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2150 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2151 /* Use that stateid */
2152 } else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) {
2153 struct nfs_lockowner lockowner = {
2154 .l_owner = current->files,
2155 .l_pid = current->tgid,
2157 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2160 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
2162 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2163 if (status == 0 && state != NULL)
2164 renew_lease(server, timestamp);
2168 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2169 struct nfs_fattr *fattr, struct iattr *sattr,
2170 struct nfs4_state *state)
2172 struct nfs_server *server = NFS_SERVER(inode);
2173 struct nfs4_exception exception = {
2179 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2181 case -NFS4ERR_OPENMODE:
2182 if (!(sattr->ia_valid & ATTR_SIZE)) {
2183 pr_warn_once("NFSv4: server %s is incorrectly "
2184 "applying open mode checks to "
2185 "a SETATTR that is not "
2186 "changing file size.\n",
2187 server->nfs_client->cl_hostname);
2189 if (state && !(state->state & FMODE_WRITE)) {
2191 if (sattr->ia_valid & ATTR_OPEN)
2196 err = nfs4_handle_exception(server, err, &exception);
2197 } while (exception.retry);
2202 struct nfs4_closedata {
2203 struct inode *inode;
2204 struct nfs4_state *state;
2205 struct nfs_closeargs arg;
2206 struct nfs_closeres res;
2207 struct nfs_fattr fattr;
2208 unsigned long timestamp;
2213 static void nfs4_free_closedata(void *data)
2215 struct nfs4_closedata *calldata = data;
2216 struct nfs4_state_owner *sp = calldata->state->owner;
2217 struct super_block *sb = calldata->state->inode->i_sb;
2220 pnfs_roc_release(calldata->state->inode);
2221 nfs4_put_open_state(calldata->state);
2222 nfs_free_seqid(calldata->arg.seqid);
2223 nfs4_put_state_owner(sp);
2224 nfs_sb_deactive(sb);
2228 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2231 spin_lock(&state->owner->so_lock);
2232 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2233 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2235 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2238 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2241 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2242 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2243 clear_bit(NFS_OPEN_STATE, &state->flags);
2245 spin_unlock(&state->owner->so_lock);
2248 static void nfs4_close_done(struct rpc_task *task, void *data)
2250 struct nfs4_closedata *calldata = data;
2251 struct nfs4_state *state = calldata->state;
2252 struct nfs_server *server = NFS_SERVER(calldata->inode);
2254 dprintk("%s: begin!\n", __func__);
2255 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2257 /* hmm. we are done with the inode, and in the process of freeing
2258 * the state_owner. we keep this around to process errors
2260 switch (task->tk_status) {
2263 pnfs_roc_set_barrier(state->inode,
2264 calldata->roc_barrier);
2265 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
2266 renew_lease(server, calldata->timestamp);
2267 nfs4_close_clear_stateid_flags(state,
2268 calldata->arg.fmode);
2270 case -NFS4ERR_STALE_STATEID:
2271 case -NFS4ERR_OLD_STATEID:
2272 case -NFS4ERR_BAD_STATEID:
2273 case -NFS4ERR_EXPIRED:
2274 if (calldata->arg.fmode == 0)
2277 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2278 rpc_restart_call_prepare(task);
2280 nfs_release_seqid(calldata->arg.seqid);
2281 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2282 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2285 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2287 struct nfs4_closedata *calldata = data;
2288 struct nfs4_state *state = calldata->state;
2289 struct inode *inode = calldata->inode;
2292 dprintk("%s: begin!\n", __func__);
2293 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2296 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2297 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
2298 spin_lock(&state->owner->so_lock);
2299 /* Calculate the change in open mode */
2300 if (state->n_rdwr == 0) {
2301 if (state->n_rdonly == 0) {
2302 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2303 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2304 calldata->arg.fmode &= ~FMODE_READ;
2306 if (state->n_wronly == 0) {
2307 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2308 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2309 calldata->arg.fmode &= ~FMODE_WRITE;
2312 if (!nfs4_valid_open_stateid(state))
2314 spin_unlock(&state->owner->so_lock);
2317 /* Note: exit _without_ calling nfs4_close_done */
2321 if (calldata->arg.fmode == 0) {
2322 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2323 if (calldata->roc &&
2324 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2325 nfs_release_seqid(calldata->arg.seqid);
2330 nfs_fattr_init(calldata->res.fattr);
2331 calldata->timestamp = jiffies;
2332 if (nfs4_setup_sequence(NFS_SERVER(inode),
2333 &calldata->arg.seq_args,
2334 &calldata->res.seq_res,
2336 nfs_release_seqid(calldata->arg.seqid);
2337 dprintk("%s: done!\n", __func__);
2340 task->tk_action = NULL;
2342 nfs4_sequence_done(task, &calldata->res.seq_res);
2345 static const struct rpc_call_ops nfs4_close_ops = {
2346 .rpc_call_prepare = nfs4_close_prepare,
2347 .rpc_call_done = nfs4_close_done,
2348 .rpc_release = nfs4_free_closedata,
2352 * It is possible for data to be read/written from a mem-mapped file
2353 * after the sys_close call (which hits the vfs layer as a flush).
2354 * This means that we can't safely call nfsv4 close on a file until
2355 * the inode is cleared. This in turn means that we are not good
2356 * NFSv4 citizens - we do not indicate to the server to update the file's
2357 * share state even when we are done with one of the three share
2358 * stateid's in the inode.
2360 * NOTE: Caller must be holding the sp->so_owner semaphore!
2362 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
2364 struct nfs_server *server = NFS_SERVER(state->inode);
2365 struct nfs4_closedata *calldata;
2366 struct nfs4_state_owner *sp = state->owner;
2367 struct rpc_task *task;
2368 struct rpc_message msg = {
2369 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2370 .rpc_cred = state->owner->so_cred,
2372 struct rpc_task_setup task_setup_data = {
2373 .rpc_client = server->client,
2374 .rpc_message = &msg,
2375 .callback_ops = &nfs4_close_ops,
2376 .workqueue = nfsiod_workqueue,
2377 .flags = RPC_TASK_ASYNC,
2379 int status = -ENOMEM;
2381 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2382 if (calldata == NULL)
2384 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2385 calldata->inode = state->inode;
2386 calldata->state = state;
2387 calldata->arg.fh = NFS_FH(state->inode);
2388 calldata->arg.stateid = &state->open_stateid;
2389 /* Serialization for the sequence id */
2390 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2391 if (calldata->arg.seqid == NULL)
2392 goto out_free_calldata;
2393 calldata->arg.fmode = 0;
2394 calldata->arg.bitmask = server->cache_consistency_bitmask;
2395 calldata->res.fattr = &calldata->fattr;
2396 calldata->res.seqid = calldata->arg.seqid;
2397 calldata->res.server = server;
2398 calldata->roc = pnfs_roc(state->inode);
2399 nfs_sb_active(calldata->inode->i_sb);
2401 msg.rpc_argp = &calldata->arg;
2402 msg.rpc_resp = &calldata->res;
2403 task_setup_data.callback_data = calldata;
2404 task = rpc_run_task(&task_setup_data);
2406 return PTR_ERR(task);
2409 status = rpc_wait_for_completion_task(task);
2415 nfs4_put_open_state(state);
2416 nfs4_put_state_owner(sp);
2420 static struct inode *
2421 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2423 struct nfs4_state *state;
2425 /* Protect against concurrent sillydeletes */
2426 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2427 ctx->cred, &ctx->mdsthreshold);
2429 return ERR_CAST(state);
2431 return igrab(state->inode);
2434 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2436 if (ctx->state == NULL)
2439 nfs4_close_sync(ctx->state, ctx->mode);
2441 nfs4_close_state(ctx->state, ctx->mode);
2444 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2446 struct nfs4_server_caps_arg args = {
2449 struct nfs4_server_caps_res res = {};
2450 struct rpc_message msg = {
2451 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2457 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2459 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2460 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2461 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2462 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2463 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2464 NFS_CAP_CTIME|NFS_CAP_MTIME);
2465 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2466 server->caps |= NFS_CAP_ACLS;
2467 if (res.has_links != 0)
2468 server->caps |= NFS_CAP_HARDLINKS;
2469 if (res.has_symlinks != 0)
2470 server->caps |= NFS_CAP_SYMLINKS;
2471 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2472 server->caps |= NFS_CAP_FILEID;
2473 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2474 server->caps |= NFS_CAP_MODE;
2475 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2476 server->caps |= NFS_CAP_NLINK;
2477 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2478 server->caps |= NFS_CAP_OWNER;
2479 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2480 server->caps |= NFS_CAP_OWNER_GROUP;
2481 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2482 server->caps |= NFS_CAP_ATIME;
2483 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2484 server->caps |= NFS_CAP_CTIME;
2485 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2486 server->caps |= NFS_CAP_MTIME;
2488 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2489 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2490 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2491 server->acl_bitmask = res.acl_bitmask;
2492 server->fh_expire_type = res.fh_expire_type;
2498 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2500 struct nfs4_exception exception = { };
2503 err = nfs4_handle_exception(server,
2504 _nfs4_server_capabilities(server, fhandle),
2506 } while (exception.retry);
2510 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2511 struct nfs_fsinfo *info)
2513 struct nfs4_lookup_root_arg args = {
2514 .bitmask = nfs4_fattr_bitmap,
2516 struct nfs4_lookup_res res = {
2518 .fattr = info->fattr,
2521 struct rpc_message msg = {
2522 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2527 nfs_fattr_init(info->fattr);
2528 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2531 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2532 struct nfs_fsinfo *info)
2534 struct nfs4_exception exception = { };
2537 err = _nfs4_lookup_root(server, fhandle, info);
2540 case -NFS4ERR_WRONGSEC:
2543 err = nfs4_handle_exception(server, err, &exception);
2545 } while (exception.retry);
2550 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2551 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2553 struct rpc_auth *auth;
2556 auth = rpcauth_create(flavor, server->client);
2561 ret = nfs4_lookup_root(server, fhandle, info);
2567 * Retry pseudoroot lookup with various security flavors. We do this when:
2569 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2570 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2572 * Returns zero on success, or a negative NFS4ERR value, or a
2573 * negative errno value.
2575 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2576 struct nfs_fsinfo *info)
2578 /* Per 3530bis 15.33.5 */
2579 static const rpc_authflavor_t flav_array[] = {
2583 RPC_AUTH_UNIX, /* courtesy */
2586 int status = -EPERM;
2589 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
2590 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2591 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2597 * -EACCESS could mean that the user doesn't have correct permissions
2598 * to access the mount. It could also mean that we tried to mount
2599 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2600 * existing mount programs don't handle -EACCES very well so it should
2601 * be mapped to -EPERM instead.
2603 if (status == -EACCES)
2608 static int nfs4_do_find_root_sec(struct nfs_server *server,
2609 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2611 int mv = server->nfs_client->cl_minorversion;
2612 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2616 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2617 * @server: initialized nfs_server handle
2618 * @fhandle: we fill in the pseudo-fs root file handle
2619 * @info: we fill in an FSINFO struct
2621 * Returns zero on success, or a negative errno.
2623 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2624 struct nfs_fsinfo *info)
2628 status = nfs4_lookup_root(server, fhandle, info);
2629 if ((status == -NFS4ERR_WRONGSEC) &&
2630 !(server->flags & NFS_MOUNT_SECFLAVOUR))
2631 status = nfs4_do_find_root_sec(server, fhandle, info);
2634 status = nfs4_server_capabilities(server, fhandle);
2636 status = nfs4_do_fsinfo(server, fhandle, info);
2638 return nfs4_map_errors(status);
2641 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2642 struct nfs_fsinfo *info)
2645 struct nfs_fattr *fattr = info->fattr;
2647 error = nfs4_server_capabilities(server, mntfh);
2649 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2653 error = nfs4_proc_getattr(server, mntfh, fattr);
2655 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2659 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2660 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2661 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2667 * Get locations and (maybe) other attributes of a referral.
2668 * Note that we'll actually follow the referral later when
2669 * we detect fsid mismatch in inode revalidation
2671 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2672 const struct qstr *name, struct nfs_fattr *fattr,
2673 struct nfs_fh *fhandle)
2675 int status = -ENOMEM;
2676 struct page *page = NULL;
2677 struct nfs4_fs_locations *locations = NULL;
2679 page = alloc_page(GFP_KERNEL);
2682 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2683 if (locations == NULL)
2686 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
2689 /* Make sure server returned a different fsid for the referral */
2690 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2691 dprintk("%s: server did not return a different fsid for"
2692 " a referral at %s\n", __func__, name->name);
2696 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2697 nfs_fixup_referral_attributes(&locations->fattr);
2699 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2700 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2701 memset(fhandle, 0, sizeof(struct nfs_fh));
2709 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2711 struct nfs4_getattr_arg args = {
2713 .bitmask = server->attr_bitmask,
2715 struct nfs4_getattr_res res = {
2719 struct rpc_message msg = {
2720 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2725 nfs_fattr_init(fattr);
2726 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2729 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2731 struct nfs4_exception exception = { };
2734 err = nfs4_handle_exception(server,
2735 _nfs4_proc_getattr(server, fhandle, fattr),
2737 } while (exception.retry);
2742 * The file is not closed if it is opened due to the a request to change
2743 * the size of the file. The open call will not be needed once the
2744 * VFS layer lookup-intents are implemented.
2746 * Close is called when the inode is destroyed.
2747 * If we haven't opened the file for O_WRONLY, we
2748 * need to in the size_change case to obtain a stateid.
2751 * Because OPEN is always done by name in nfsv4, it is
2752 * possible that we opened a different file by the same
2753 * name. We can recognize this race condition, but we
2754 * can't do anything about it besides returning an error.
2756 * This will be fixed with VFS changes (lookup-intent).
2759 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2760 struct iattr *sattr)
2762 struct inode *inode = dentry->d_inode;
2763 struct rpc_cred *cred = NULL;
2764 struct nfs4_state *state = NULL;
2767 if (pnfs_ld_layoutret_on_setattr(inode))
2768 pnfs_commit_and_return_layout(inode);
2770 nfs_fattr_init(fattr);
2772 /* Deal with open(O_TRUNC) */
2773 if (sattr->ia_valid & ATTR_OPEN)
2774 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2776 /* Optimization: if the end result is no change, don't RPC */
2777 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2780 /* Search for an existing open(O_WRITE) file */
2781 if (sattr->ia_valid & ATTR_FILE) {
2782 struct nfs_open_context *ctx;
2784 ctx = nfs_file_open_context(sattr->ia_file);
2791 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2793 nfs_setattr_update_inode(inode, sattr);
2797 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2798 const struct qstr *name, struct nfs_fh *fhandle,
2799 struct nfs_fattr *fattr)
2801 struct nfs_server *server = NFS_SERVER(dir);
2803 struct nfs4_lookup_arg args = {
2804 .bitmask = server->attr_bitmask,
2805 .dir_fh = NFS_FH(dir),
2808 struct nfs4_lookup_res res = {
2813 struct rpc_message msg = {
2814 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2819 nfs_fattr_init(fattr);
2821 dprintk("NFS call lookup %s\n", name->name);
2822 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2823 dprintk("NFS reply lookup: %d\n", status);
2827 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
2829 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2830 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
2831 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2835 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2836 struct qstr *name, struct nfs_fh *fhandle,
2837 struct nfs_fattr *fattr)
2839 struct nfs4_exception exception = { };
2840 struct rpc_clnt *client = *clnt;
2843 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2845 case -NFS4ERR_BADNAME:
2848 case -NFS4ERR_MOVED:
2849 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
2851 case -NFS4ERR_WRONGSEC:
2853 if (client != *clnt)
2856 client = nfs4_create_sec_client(client, dir, name);
2858 return PTR_ERR(client);
2860 exception.retry = 1;
2863 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
2865 } while (exception.retry);
2870 else if (client != *clnt)
2871 rpc_shutdown_client(client);
2876 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
2877 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2880 struct rpc_clnt *client = NFS_CLIENT(dir);
2882 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2883 if (client != NFS_CLIENT(dir)) {
2884 rpc_shutdown_client(client);
2885 nfs_fixup_secinfo_attributes(fattr);
2891 nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2892 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2895 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2897 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2899 rpc_shutdown_client(client);
2900 return ERR_PTR(status);
2905 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2907 struct nfs_server *server = NFS_SERVER(inode);
2908 struct nfs4_accessargs args = {
2909 .fh = NFS_FH(inode),
2910 .bitmask = server->cache_consistency_bitmask,
2912 struct nfs4_accessres res = {
2915 struct rpc_message msg = {
2916 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2919 .rpc_cred = entry->cred,
2921 int mode = entry->mask;
2925 * Determine which access bits we want to ask for...
2927 if (mode & MAY_READ)
2928 args.access |= NFS4_ACCESS_READ;
2929 if (S_ISDIR(inode->i_mode)) {
2930 if (mode & MAY_WRITE)
2931 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2932 if (mode & MAY_EXEC)
2933 args.access |= NFS4_ACCESS_LOOKUP;
2935 if (mode & MAY_WRITE)
2936 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2937 if (mode & MAY_EXEC)
2938 args.access |= NFS4_ACCESS_EXECUTE;
2941 res.fattr = nfs_alloc_fattr();
2942 if (res.fattr == NULL)
2945 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2947 nfs_access_set_mask(entry, res.access);
2948 nfs_refresh_inode(inode, res.fattr);
2950 nfs_free_fattr(res.fattr);
2954 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2956 struct nfs4_exception exception = { };
2959 err = nfs4_handle_exception(NFS_SERVER(inode),
2960 _nfs4_proc_access(inode, entry),
2962 } while (exception.retry);
2967 * TODO: For the time being, we don't try to get any attributes
2968 * along with any of the zero-copy operations READ, READDIR,
2971 * In the case of the first three, we want to put the GETATTR
2972 * after the read-type operation -- this is because it is hard
2973 * to predict the length of a GETATTR response in v4, and thus
2974 * align the READ data correctly. This means that the GETATTR
2975 * may end up partially falling into the page cache, and we should
2976 * shift it into the 'tail' of the xdr_buf before processing.
2977 * To do this efficiently, we need to know the total length
2978 * of data received, which doesn't seem to be available outside
2981 * In the case of WRITE, we also want to put the GETATTR after
2982 * the operation -- in this case because we want to make sure
2983 * we get the post-operation mtime and size.
2985 * Both of these changes to the XDR layer would in fact be quite
2986 * minor, but I decided to leave them for a subsequent patch.
2988 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2989 unsigned int pgbase, unsigned int pglen)
2991 struct nfs4_readlink args = {
2992 .fh = NFS_FH(inode),
2997 struct nfs4_readlink_res res;
2998 struct rpc_message msg = {
2999 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3004 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
3007 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3008 unsigned int pgbase, unsigned int pglen)
3010 struct nfs4_exception exception = { };
3013 err = nfs4_handle_exception(NFS_SERVER(inode),
3014 _nfs4_proc_readlink(inode, page, pgbase, pglen),
3016 } while (exception.retry);
3021 * This is just for mknod. open(O_CREAT) will always do ->open_context().
3024 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
3027 struct nfs_open_context *ctx;
3028 struct nfs4_state *state;
3031 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3033 return PTR_ERR(ctx);
3035 sattr->ia_mode &= ~current_umask();
3036 state = nfs4_do_open(dir, dentry, ctx->mode,
3037 flags, sattr, ctx->cred,
3038 &ctx->mdsthreshold);
3040 if (IS_ERR(state)) {
3041 status = PTR_ERR(state);
3044 d_add(dentry, igrab(state->inode));
3045 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
3048 put_nfs_open_context(ctx);
3052 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3054 struct nfs_server *server = NFS_SERVER(dir);
3055 struct nfs_removeargs args = {
3059 struct nfs_removeres res = {
3062 struct rpc_message msg = {
3063 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3069 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
3071 update_changeattr(dir, &res.cinfo);
3075 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3077 struct nfs4_exception exception = { };
3080 err = nfs4_handle_exception(NFS_SERVER(dir),
3081 _nfs4_proc_remove(dir, name),
3083 } while (exception.retry);
3087 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
3089 struct nfs_server *server = NFS_SERVER(dir);
3090 struct nfs_removeargs *args = msg->rpc_argp;
3091 struct nfs_removeres *res = msg->rpc_resp;
3093 res->server = server;
3094 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
3095 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
3098 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3100 nfs4_setup_sequence(NFS_SERVER(data->dir),
3101 &data->args.seq_args,
3106 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
3108 struct nfs_removeres *res = task->tk_msg.rpc_resp;
3110 if (!nfs4_sequence_done(task, &res->seq_res))
3112 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3114 update_changeattr(dir, &res->cinfo);
3118 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3120 struct nfs_server *server = NFS_SERVER(dir);
3121 struct nfs_renameargs *arg = msg->rpc_argp;
3122 struct nfs_renameres *res = msg->rpc_resp;
3124 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
3125 res->server = server;
3126 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
3129 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3131 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3132 &data->args.seq_args,
3137 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3138 struct inode *new_dir)
3140 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3142 if (!nfs4_sequence_done(task, &res->seq_res))
3144 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3147 update_changeattr(old_dir, &res->old_cinfo);
3148 update_changeattr(new_dir, &res->new_cinfo);
3152 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3153 struct inode *new_dir, struct qstr *new_name)
3155 struct nfs_server *server = NFS_SERVER(old_dir);
3156 struct nfs_renameargs arg = {
3157 .old_dir = NFS_FH(old_dir),
3158 .new_dir = NFS_FH(new_dir),
3159 .old_name = old_name,
3160 .new_name = new_name,
3162 struct nfs_renameres res = {
3165 struct rpc_message msg = {
3166 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3170 int status = -ENOMEM;
3172 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3174 update_changeattr(old_dir, &res.old_cinfo);
3175 update_changeattr(new_dir, &res.new_cinfo);
3180 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3181 struct inode *new_dir, struct qstr *new_name)
3183 struct nfs4_exception exception = { };
3186 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3187 _nfs4_proc_rename(old_dir, old_name,
3190 } while (exception.retry);
3194 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3196 struct nfs_server *server = NFS_SERVER(inode);
3197 struct nfs4_link_arg arg = {
3198 .fh = NFS_FH(inode),
3199 .dir_fh = NFS_FH(dir),
3201 .bitmask = server->attr_bitmask,
3203 struct nfs4_link_res res = {
3206 struct rpc_message msg = {
3207 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3211 int status = -ENOMEM;
3213 res.fattr = nfs_alloc_fattr();
3214 if (res.fattr == NULL)
3217 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3219 update_changeattr(dir, &res.cinfo);
3220 nfs_post_op_update_inode(inode, res.fattr);
3223 nfs_free_fattr(res.fattr);
3227 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3229 struct nfs4_exception exception = { };
3232 err = nfs4_handle_exception(NFS_SERVER(inode),
3233 _nfs4_proc_link(inode, dir, name),
3235 } while (exception.retry);
3239 struct nfs4_createdata {
3240 struct rpc_message msg;
3241 struct nfs4_create_arg arg;
3242 struct nfs4_create_res res;
3244 struct nfs_fattr fattr;
3247 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3248 struct qstr *name, struct iattr *sattr, u32 ftype)
3250 struct nfs4_createdata *data;
3252 data = kzalloc(sizeof(*data), GFP_KERNEL);
3254 struct nfs_server *server = NFS_SERVER(dir);
3256 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3257 data->msg.rpc_argp = &data->arg;
3258 data->msg.rpc_resp = &data->res;
3259 data->arg.dir_fh = NFS_FH(dir);
3260 data->arg.server = server;
3261 data->arg.name = name;
3262 data->arg.attrs = sattr;
3263 data->arg.ftype = ftype;
3264 data->arg.bitmask = server->attr_bitmask;
3265 data->res.server = server;
3266 data->res.fh = &data->fh;
3267 data->res.fattr = &data->fattr;
3268 nfs_fattr_init(data->res.fattr);
3273 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3275 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3276 &data->arg.seq_args, &data->res.seq_res, 1);
3278 update_changeattr(dir, &data->res.dir_cinfo);
3279 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3284 static void nfs4_free_createdata(struct nfs4_createdata *data)
3289 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3290 struct page *page, unsigned int len, struct iattr *sattr)
3292 struct nfs4_createdata *data;
3293 int status = -ENAMETOOLONG;
3295 if (len > NFS4_MAXPATHLEN)
3299 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3303 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3304 data->arg.u.symlink.pages = &page;
3305 data->arg.u.symlink.len = len;
3307 status = nfs4_do_create(dir, dentry, data);
3309 nfs4_free_createdata(data);
3314 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3315 struct page *page, unsigned int len, struct iattr *sattr)
3317 struct nfs4_exception exception = { };
3320 err = nfs4_handle_exception(NFS_SERVER(dir),
3321 _nfs4_proc_symlink(dir, dentry, page,
3324 } while (exception.retry);
3328 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3329 struct iattr *sattr)
3331 struct nfs4_createdata *data;
3332 int status = -ENOMEM;
3334 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3338 status = nfs4_do_create(dir, dentry, data);
3340 nfs4_free_createdata(data);
3345 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3346 struct iattr *sattr)
3348 struct nfs4_exception exception = { };
3351 sattr->ia_mode &= ~current_umask();
3353 err = nfs4_handle_exception(NFS_SERVER(dir),
3354 _nfs4_proc_mkdir(dir, dentry, sattr),
3356 } while (exception.retry);
3360 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3361 u64 cookie, struct page **pages, unsigned int count, int plus)
3363 struct inode *dir = dentry->d_inode;
3364 struct nfs4_readdir_arg args = {
3369 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3372 struct nfs4_readdir_res res;
3373 struct rpc_message msg = {
3374 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3381 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3382 dentry->d_parent->d_name.name,
3383 dentry->d_name.name,
3384 (unsigned long long)cookie);
3385 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
3386 res.pgbase = args.pgbase;
3387 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3389 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
3390 status += args.pgbase;
3393 nfs_invalidate_atime(dir);
3395 dprintk("%s: returns %d\n", __func__, status);
3399 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3400 u64 cookie, struct page **pages, unsigned int count, int plus)
3402 struct nfs4_exception exception = { };
3405 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3406 _nfs4_proc_readdir(dentry, cred, cookie,
3407 pages, count, plus),
3409 } while (exception.retry);
3413 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3414 struct iattr *sattr, dev_t rdev)
3416 struct nfs4_createdata *data;
3417 int mode = sattr->ia_mode;
3418 int status = -ENOMEM;
3420 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3425 data->arg.ftype = NF4FIFO;
3426 else if (S_ISBLK(mode)) {
3427 data->arg.ftype = NF4BLK;
3428 data->arg.u.device.specdata1 = MAJOR(rdev);
3429 data->arg.u.device.specdata2 = MINOR(rdev);
3431 else if (S_ISCHR(mode)) {
3432 data->arg.ftype = NF4CHR;
3433 data->arg.u.device.specdata1 = MAJOR(rdev);
3434 data->arg.u.device.specdata2 = MINOR(rdev);
3435 } else if (!S_ISSOCK(mode)) {
3440 status = nfs4_do_create(dir, dentry, data);
3442 nfs4_free_createdata(data);
3447 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3448 struct iattr *sattr, dev_t rdev)
3450 struct nfs4_exception exception = { };
3453 sattr->ia_mode &= ~current_umask();
3455 err = nfs4_handle_exception(NFS_SERVER(dir),
3456 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3458 } while (exception.retry);
3462 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3463 struct nfs_fsstat *fsstat)
3465 struct nfs4_statfs_arg args = {
3467 .bitmask = server->attr_bitmask,
3469 struct nfs4_statfs_res res = {
3472 struct rpc_message msg = {
3473 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3478 nfs_fattr_init(fsstat->fattr);
3479 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3482 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3484 struct nfs4_exception exception = { };
3487 err = nfs4_handle_exception(server,
3488 _nfs4_proc_statfs(server, fhandle, fsstat),
3490 } while (exception.retry);
3494 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3495 struct nfs_fsinfo *fsinfo)
3497 struct nfs4_fsinfo_arg args = {
3499 .bitmask = server->attr_bitmask,
3501 struct nfs4_fsinfo_res res = {
3504 struct rpc_message msg = {
3505 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3510 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3513 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3515 struct nfs4_exception exception = { };
3516 unsigned long now = jiffies;
3520 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
3522 struct nfs_client *clp = server->nfs_client;
3524 spin_lock(&clp->cl_lock);
3525 clp->cl_lease_time = fsinfo->lease_time * HZ;
3526 clp->cl_last_renewal = now;
3527 spin_unlock(&clp->cl_lock);
3530 err = nfs4_handle_exception(server, err, &exception);
3531 } while (exception.retry);
3535 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3539 nfs_fattr_init(fsinfo->fattr);
3540 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
3542 /* block layout checks this! */
3543 server->pnfs_blksize = fsinfo->blksize;
3544 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
3550 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3551 struct nfs_pathconf *pathconf)
3553 struct nfs4_pathconf_arg args = {
3555 .bitmask = server->attr_bitmask,
3557 struct nfs4_pathconf_res res = {
3558 .pathconf = pathconf,
3560 struct rpc_message msg = {
3561 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3566 /* None of the pathconf attributes are mandatory to implement */
3567 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3568 memset(pathconf, 0, sizeof(*pathconf));
3572 nfs_fattr_init(pathconf->fattr);
3573 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3576 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3577 struct nfs_pathconf *pathconf)
3579 struct nfs4_exception exception = { };
3583 err = nfs4_handle_exception(server,
3584 _nfs4_proc_pathconf(server, fhandle, pathconf),
3586 } while (exception.retry);
3590 int nfs4_set_rw_stateid(nfs4_stateid *stateid,
3591 const struct nfs_open_context *ctx,
3592 const struct nfs_lock_context *l_ctx,
3595 const struct nfs_lockowner *lockowner = NULL;
3598 lockowner = &l_ctx->lockowner;
3599 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
3601 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3603 static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3604 const struct nfs_open_context *ctx,
3605 const struct nfs_lock_context *l_ctx,
3608 nfs4_stateid current_stateid;
3610 /* If the current stateid represents a lost lock, then exit */
3611 if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode) == -EIO)
3613 return nfs4_stateid_match(stateid, ¤t_stateid);
3616 static bool nfs4_error_stateid_expired(int err)
3619 case -NFS4ERR_DELEG_REVOKED:
3620 case -NFS4ERR_ADMIN_REVOKED:
3621 case -NFS4ERR_BAD_STATEID:
3622 case -NFS4ERR_STALE_STATEID:
3623 case -NFS4ERR_OLD_STATEID:
3624 case -NFS4ERR_OPENMODE:
3625 case -NFS4ERR_EXPIRED:
3631 void __nfs4_read_done_cb(struct nfs_read_data *data)
3633 nfs_invalidate_atime(data->header->inode);
3636 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3638 struct nfs_server *server = NFS_SERVER(data->header->inode);
3640 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3641 rpc_restart_call_prepare(task);
3645 __nfs4_read_done_cb(data);
3646 if (task->tk_status > 0)
3647 renew_lease(server, data->timestamp);
3651 static bool nfs4_read_stateid_changed(struct rpc_task *task,
3652 struct nfs_readargs *args)
3655 if (!nfs4_error_stateid_expired(task->tk_status) ||
3656 nfs4_stateid_is_current(&args->stateid,
3661 rpc_restart_call_prepare(task);
3665 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3668 dprintk("--> %s\n", __func__);
3670 if (!nfs4_sequence_done(task, &data->res.seq_res))
3672 if (nfs4_read_stateid_changed(task, &data->args))
3674 return data->read_done_cb ? data->read_done_cb(task, data) :
3675 nfs4_read_done_cb(task, data);
3678 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3680 data->timestamp = jiffies;
3681 data->read_done_cb = nfs4_read_done_cb;
3682 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3683 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
3686 static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3688 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3689 &data->args.seq_args,
3693 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3694 data->args.lock_context, FMODE_READ);
3697 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3699 struct inode *inode = data->header->inode;
3701 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3702 rpc_restart_call_prepare(task);
3705 if (task->tk_status >= 0) {
3706 renew_lease(NFS_SERVER(inode), data->timestamp);
3707 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
3712 static bool nfs4_write_stateid_changed(struct rpc_task *task,
3713 struct nfs_writeargs *args)
3716 if (!nfs4_error_stateid_expired(task->tk_status) ||
3717 nfs4_stateid_is_current(&args->stateid,
3722 rpc_restart_call_prepare(task);
3726 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3728 if (!nfs4_sequence_done(task, &data->res.seq_res))
3730 if (nfs4_write_stateid_changed(task, &data->args))
3732 return data->write_done_cb ? data->write_done_cb(task, data) :
3733 nfs4_write_done_cb(task, data);
3737 bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
3739 const struct nfs_pgio_header *hdr = data->header;
3741 /* Don't request attributes for pNFS or O_DIRECT writes */
3742 if (data->ds_clp != NULL || hdr->dreq != NULL)
3744 /* Otherwise, request attributes if and only if we don't hold
3747 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
3750 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3752 struct nfs_server *server = NFS_SERVER(data->header->inode);
3754 if (!nfs4_write_need_cache_consistency_data(data)) {
3755 data->args.bitmask = NULL;
3756 data->res.fattr = NULL;
3758 data->args.bitmask = server->cache_consistency_bitmask;
3760 if (!data->write_done_cb)
3761 data->write_done_cb = nfs4_write_done_cb;
3762 data->res.server = server;
3763 data->timestamp = jiffies;
3765 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3766 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3769 static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3771 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3772 &data->args.seq_args,
3776 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3777 data->args.lock_context, FMODE_WRITE);
3780 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
3782 nfs4_setup_sequence(NFS_SERVER(data->inode),
3783 &data->args.seq_args,
3788 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
3790 struct inode *inode = data->inode;
3792 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3793 rpc_restart_call_prepare(task);
3799 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
3801 if (!nfs4_sequence_done(task, &data->res.seq_res))
3803 return data->commit_done_cb(task, data);
3806 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
3808 struct nfs_server *server = NFS_SERVER(data->inode);
3810 if (data->commit_done_cb == NULL)
3811 data->commit_done_cb = nfs4_commit_done_cb;
3812 data->res.server = server;
3813 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3814 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3817 struct nfs4_renewdata {
3818 struct nfs_client *client;
3819 unsigned long timestamp;
3823 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3824 * standalone procedure for queueing an asynchronous RENEW.
3826 static void nfs4_renew_release(void *calldata)
3828 struct nfs4_renewdata *data = calldata;
3829 struct nfs_client *clp = data->client;
3831 if (atomic_read(&clp->cl_count) > 1)
3832 nfs4_schedule_state_renewal(clp);
3833 nfs_put_client(clp);
3837 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3839 struct nfs4_renewdata *data = calldata;
3840 struct nfs_client *clp = data->client;
3841 unsigned long timestamp = data->timestamp;
3843 if (task->tk_status < 0) {
3844 /* Unless we're shutting down, schedule state recovery! */
3845 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3847 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3848 nfs4_schedule_lease_recovery(clp);
3851 nfs4_schedule_path_down_recovery(clp);
3853 do_renew_lease(clp, timestamp);
3856 static const struct rpc_call_ops nfs4_renew_ops = {
3857 .rpc_call_done = nfs4_renew_done,
3858 .rpc_release = nfs4_renew_release,
3861 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3863 struct rpc_message msg = {
3864 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3868 struct nfs4_renewdata *data;
3870 if (renew_flags == 0)
3872 if (!atomic_inc_not_zero(&clp->cl_count))
3874 data = kmalloc(sizeof(*data), GFP_NOFS);
3878 data->timestamp = jiffies;
3879 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
3880 &nfs4_renew_ops, data);
3883 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3885 struct rpc_message msg = {
3886 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3890 unsigned long now = jiffies;
3893 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3896 do_renew_lease(clp, now);
3900 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3902 return (server->caps & NFS_CAP_ACLS)
3903 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3904 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3907 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3908 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
3911 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
3913 static int buf_to_pages_noslab(const void *buf, size_t buflen,
3914 struct page **pages, unsigned int *pgbase)
3916 struct page *newpage, **spages;
3922 len = min_t(size_t, PAGE_SIZE, buflen);
3923 newpage = alloc_page(GFP_KERNEL);
3925 if (newpage == NULL)
3927 memcpy(page_address(newpage), buf, len);
3932 } while (buflen != 0);
3938 __free_page(spages[rc-1]);
3942 struct nfs4_cached_acl {
3948 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3950 struct nfs_inode *nfsi = NFS_I(inode);
3952 spin_lock(&inode->i_lock);
3953 kfree(nfsi->nfs4_acl);
3954 nfsi->nfs4_acl = acl;
3955 spin_unlock(&inode->i_lock);
3958 static void nfs4_zap_acl_attr(struct inode *inode)
3960 nfs4_set_cached_acl(inode, NULL);
3963 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3965 struct nfs_inode *nfsi = NFS_I(inode);
3966 struct nfs4_cached_acl *acl;
3969 spin_lock(&inode->i_lock);
3970 acl = nfsi->nfs4_acl;
3973 if (buf == NULL) /* user is just asking for length */
3975 if (acl->cached == 0)
3977 ret = -ERANGE; /* see getxattr(2) man page */
3978 if (acl->len > buflen)
3980 memcpy(buf, acl->data, acl->len);
3984 spin_unlock(&inode->i_lock);
3988 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
3990 struct nfs4_cached_acl *acl;
3991 size_t buflen = sizeof(*acl) + acl_len;
3993 if (buflen <= PAGE_SIZE) {
3994 acl = kmalloc(buflen, GFP_KERNEL);
3998 _copy_from_pages(acl->data, pages, pgbase, acl_len);
4000 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4007 nfs4_set_cached_acl(inode, acl);
4011 * The getxattr API returns the required buffer length when called with a
4012 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4013 * the required buf. On a NULL buf, we send a page of data to the server
4014 * guessing that the ACL request can be serviced by a page. If so, we cache
4015 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4016 * the cache. If not so, we throw away the page, and cache the required
4017 * length. The next getxattr call will then produce another round trip to
4018 * the server, this time with the input buf of the required size.
4020 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4022 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
4023 struct nfs_getaclargs args = {
4024 .fh = NFS_FH(inode),
4028 struct nfs_getaclres res = {
4031 struct rpc_message msg = {
4032 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4036 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4037 int ret = -ENOMEM, i;
4039 /* As long as we're doing a round trip to the server anyway,
4040 * let's be prepared for a page of acl data. */
4043 if (npages > ARRAY_SIZE(pages))
4046 for (i = 0; i < npages; i++) {
4047 pages[i] = alloc_page(GFP_KERNEL);
4052 /* for decoding across pages */
4053 res.acl_scratch = alloc_page(GFP_KERNEL);
4054 if (!res.acl_scratch)
4057 args.acl_len = npages * PAGE_SIZE;
4058 args.acl_pgbase = 0;
4060 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
4061 __func__, buf, buflen, npages, args.acl_len);
4062 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4063 &msg, &args.seq_args, &res.seq_res, 0);
4067 /* Handle the case where the passed-in buffer is too short */
4068 if (res.acl_flags & NFS4_ACL_TRUNC) {
4069 /* Did the user only issue a request for the acl length? */
4075 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
4077 if (res.acl_len > buflen) {
4081 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
4086 for (i = 0; i < npages; i++)
4088 __free_page(pages[i]);
4089 if (res.acl_scratch)
4090 __free_page(res.acl_scratch);
4094 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4096 struct nfs4_exception exception = { };
4099 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4102 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4103 } while (exception.retry);
4107 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4109 struct nfs_server *server = NFS_SERVER(inode);
4112 if (!nfs4_server_supports_acls(server))
4114 ret = nfs_revalidate_inode(server, inode);
4117 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4118 nfs_zap_acl_cache(inode);
4119 ret = nfs4_read_cached_acl(inode, buf, buflen);
4121 /* -ENOENT is returned if there is no ACL or if there is an ACL
4122 * but no cached acl data, just the acl length */
4124 return nfs4_get_acl_uncached(inode, buf, buflen);
4127 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4129 struct nfs_server *server = NFS_SERVER(inode);
4130 struct page *pages[NFS4ACL_MAXPAGES];
4131 struct nfs_setaclargs arg = {
4132 .fh = NFS_FH(inode),
4136 struct nfs_setaclres res;
4137 struct rpc_message msg = {
4138 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4142 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4145 if (!nfs4_server_supports_acls(server))
4147 if (npages > ARRAY_SIZE(pages))
4149 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4152 nfs4_inode_return_delegation(inode);
4153 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4156 * Free each page after tx, so the only ref left is
4157 * held by the network stack
4160 put_page(pages[i-1]);
4163 * Acl update can result in inode attribute update.
4164 * so mark the attribute cache invalid.
4166 spin_lock(&inode->i_lock);
4167 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4168 spin_unlock(&inode->i_lock);
4169 nfs_access_zap_cache(inode);
4170 nfs_zap_acl_cache(inode);
4174 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4176 struct nfs4_exception exception = { };
4179 err = nfs4_handle_exception(NFS_SERVER(inode),
4180 __nfs4_proc_set_acl(inode, buf, buflen),
4182 } while (exception.retry);
4187 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
4189 struct nfs_client *clp = server->nfs_client;
4191 if (task->tk_status >= 0)
4193 switch(task->tk_status) {
4194 case -NFS4ERR_DELEG_REVOKED:
4195 case -NFS4ERR_ADMIN_REVOKED:
4196 case -NFS4ERR_BAD_STATEID:
4199 nfs_remove_bad_delegation(state->inode);
4200 case -NFS4ERR_OPENMODE:
4203 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4204 goto stateid_invalid;
4205 goto wait_on_recovery;
4206 case -NFS4ERR_EXPIRED:
4207 if (state != NULL) {
4208 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4209 goto stateid_invalid;
4211 case -NFS4ERR_STALE_STATEID:
4212 case -NFS4ERR_STALE_CLIENTID:
4213 nfs4_schedule_lease_recovery(clp);
4214 goto wait_on_recovery;
4215 #if defined(CONFIG_NFS_V4_1)
4216 case -NFS4ERR_BADSESSION:
4217 case -NFS4ERR_BADSLOT:
4218 case -NFS4ERR_BAD_HIGH_SLOT:
4219 case -NFS4ERR_DEADSESSION:
4220 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4221 case -NFS4ERR_SEQ_FALSE_RETRY:
4222 case -NFS4ERR_SEQ_MISORDERED:
4223 dprintk("%s ERROR %d, Reset session\n", __func__,
4225 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4226 goto wait_on_recovery;
4227 #endif /* CONFIG_NFS_V4_1 */
4228 case -NFS4ERR_DELAY:
4229 nfs_inc_server_stats(server, NFSIOS_DELAY);
4230 case -NFS4ERR_GRACE:
4231 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4232 task->tk_status = 0;
4234 case -NFS4ERR_RETRY_UNCACHED_REP:
4235 case -NFS4ERR_OLD_STATEID:
4236 task->tk_status = 0;
4239 task->tk_status = nfs4_map_errors(task->tk_status);
4242 task->tk_status = -EIO;
4245 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
4246 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4247 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4248 task->tk_status = 0;
4252 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4253 nfs4_verifier *bootverf)
4257 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4258 /* An impossible timestamp guarantees this value
4259 * will never match a generated boot time. */
4261 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4263 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4264 verf[0] = (__be32)nn->boot_time.tv_sec;
4265 verf[1] = (__be32)nn->boot_time.tv_nsec;
4267 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4271 nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4272 char *buf, size_t len)
4274 unsigned int result;
4277 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4279 rpc_peeraddr2str(clp->cl_rpcclient,
4281 rpc_peeraddr2str(clp->cl_rpcclient,
4282 RPC_DISPLAY_PROTO));
4288 nfs4_init_uniform_client_string(const struct nfs_client *clp,
4289 char *buf, size_t len)
4291 char *nodename = clp->cl_rpcclient->cl_nodename;
4293 if (nfs4_client_id_uniquifier[0] != '\0')
4294 nodename = nfs4_client_id_uniquifier;
4295 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4296 clp->rpc_ops->version, clp->cl_minorversion,
4301 * nfs4_proc_setclientid - Negotiate client ID
4302 * @clp: state data structure
4303 * @program: RPC program for NFSv4 callback service
4304 * @port: IP port number for NFS4 callback service
4305 * @cred: RPC credential to use for this call
4306 * @res: where to place the result
4308 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4310 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4311 unsigned short port, struct rpc_cred *cred,
4312 struct nfs4_setclientid_res *res)
4314 nfs4_verifier sc_verifier;
4315 struct nfs4_setclientid setclientid = {
4316 .sc_verifier = &sc_verifier,
4318 .sc_cb_ident = clp->cl_cb_ident,
4320 struct rpc_message msg = {
4321 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4322 .rpc_argp = &setclientid,
4328 /* nfs_client_id4 */
4329 nfs4_init_boot_verifier(clp, &sc_verifier);
4330 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4331 setclientid.sc_name_len =
4332 nfs4_init_uniform_client_string(clp,
4333 setclientid.sc_name,
4334 sizeof(setclientid.sc_name));
4336 setclientid.sc_name_len =
4337 nfs4_init_nonuniform_client_string(clp,
4338 setclientid.sc_name,
4339 sizeof(setclientid.sc_name));
4342 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
4343 sizeof(setclientid.sc_netid),
4344 rpc_peeraddr2str(clp->cl_rpcclient,
4345 RPC_DISPLAY_NETID));
4347 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
4348 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
4349 clp->cl_ipaddr, port >> 8, port & 255);
4351 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4352 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4353 setclientid.sc_name_len, setclientid.sc_name);
4354 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4355 dprintk("NFS reply setclientid: %d\n", status);
4360 * nfs4_proc_setclientid_confirm - Confirm client ID
4361 * @clp: state data structure
4362 * @res: result of a previous SETCLIENTID
4363 * @cred: RPC credential to use for this call
4365 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4367 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
4368 struct nfs4_setclientid_res *arg,
4369 struct rpc_cred *cred)
4371 struct rpc_message msg = {
4372 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
4378 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4379 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4381 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4382 dprintk("NFS reply setclientid_confirm: %d\n", status);
4386 struct nfs4_delegreturndata {
4387 struct nfs4_delegreturnargs args;
4388 struct nfs4_delegreturnres res;
4390 nfs4_stateid stateid;
4391 unsigned long timestamp;
4392 struct nfs_fattr fattr;
4396 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4398 struct nfs4_delegreturndata *data = calldata;
4400 if (!nfs4_sequence_done(task, &data->res.seq_res))
4403 switch (task->tk_status) {
4405 renew_lease(data->res.server, data->timestamp);
4407 case -NFS4ERR_ADMIN_REVOKED:
4408 case -NFS4ERR_DELEG_REVOKED:
4409 case -NFS4ERR_BAD_STATEID:
4410 case -NFS4ERR_OLD_STATEID:
4411 case -NFS4ERR_STALE_STATEID:
4412 case -NFS4ERR_EXPIRED:
4413 task->tk_status = 0;
4416 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4418 rpc_restart_call_prepare(task);
4422 data->rpc_status = task->tk_status;
4425 static void nfs4_delegreturn_release(void *calldata)
4430 #if defined(CONFIG_NFS_V4_1)
4431 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4433 struct nfs4_delegreturndata *d_data;
4435 d_data = (struct nfs4_delegreturndata *)data;
4437 nfs4_setup_sequence(d_data->res.server,
4438 &d_data->args.seq_args,
4439 &d_data->res.seq_res,
4442 #endif /* CONFIG_NFS_V4_1 */
4444 static const struct rpc_call_ops nfs4_delegreturn_ops = {
4445 #if defined(CONFIG_NFS_V4_1)
4446 .rpc_call_prepare = nfs4_delegreturn_prepare,
4447 #endif /* CONFIG_NFS_V4_1 */
4448 .rpc_call_done = nfs4_delegreturn_done,
4449 .rpc_release = nfs4_delegreturn_release,
4452 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4454 struct nfs4_delegreturndata *data;
4455 struct nfs_server *server = NFS_SERVER(inode);
4456 struct rpc_task *task;
4457 struct rpc_message msg = {
4458 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4461 struct rpc_task_setup task_setup_data = {
4462 .rpc_client = server->client,
4463 .rpc_message = &msg,
4464 .callback_ops = &nfs4_delegreturn_ops,
4465 .flags = RPC_TASK_ASYNC,
4469 data = kzalloc(sizeof(*data), GFP_NOFS);
4472 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4473 data->args.fhandle = &data->fh;
4474 data->args.stateid = &data->stateid;
4475 data->args.bitmask = server->cache_consistency_bitmask;
4476 nfs_copy_fh(&data->fh, NFS_FH(inode));
4477 nfs4_stateid_copy(&data->stateid, stateid);
4478 data->res.fattr = &data->fattr;
4479 data->res.server = server;
4480 nfs_fattr_init(data->res.fattr);
4481 data->timestamp = jiffies;
4482 data->rpc_status = 0;
4484 task_setup_data.callback_data = data;
4485 msg.rpc_argp = &data->args;
4486 msg.rpc_resp = &data->res;
4487 task = rpc_run_task(&task_setup_data);
4489 return PTR_ERR(task);
4492 status = nfs4_wait_for_completion_rpc_task(task);
4495 status = data->rpc_status;
4497 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4499 nfs_refresh_inode(inode, &data->fattr);
4505 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4507 struct nfs_server *server = NFS_SERVER(inode);
4508 struct nfs4_exception exception = { };
4511 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
4513 case -NFS4ERR_STALE_STATEID:
4514 case -NFS4ERR_EXPIRED:
4518 err = nfs4_handle_exception(server, err, &exception);
4519 } while (exception.retry);
4523 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4524 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4527 * sleep, with exponential backoff, and retry the LOCK operation.
4529 static unsigned long
4530 nfs4_set_lock_task_retry(unsigned long timeout)
4532 freezable_schedule_timeout_killable_unsafe(timeout);
4534 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4535 return NFS4_LOCK_MAXTIMEOUT;
4539 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4541 struct inode *inode = state->inode;
4542 struct nfs_server *server = NFS_SERVER(inode);
4543 struct nfs_client *clp = server->nfs_client;
4544 struct nfs_lockt_args arg = {
4545 .fh = NFS_FH(inode),
4548 struct nfs_lockt_res res = {
4551 struct rpc_message msg = {
4552 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4555 .rpc_cred = state->owner->so_cred,
4557 struct nfs4_lock_state *lsp;
4560 arg.lock_owner.clientid = clp->cl_clientid;
4561 status = nfs4_set_lock_state(state, request);
4564 lsp = request->fl_u.nfs4_fl.owner;
4565 arg.lock_owner.id = lsp->ls_seqid.owner_id;
4566 arg.lock_owner.s_dev = server->s_dev;
4567 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4570 request->fl_type = F_UNLCK;
4572 case -NFS4ERR_DENIED:
4575 request->fl_ops->fl_release_private(request);
4576 request->fl_ops = NULL;
4581 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4583 struct nfs4_exception exception = { };
4587 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4588 _nfs4_proc_getlk(state, cmd, request),
4590 } while (exception.retry);
4594 static int do_vfs_lock(struct file *file, struct file_lock *fl)
4597 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4599 res = posix_lock_file_wait(file, fl);
4602 res = flock_lock_file_wait(file, fl);
4610 struct nfs4_unlockdata {
4611 struct nfs_locku_args arg;
4612 struct nfs_locku_res res;
4613 struct nfs4_lock_state *lsp;
4614 struct nfs_open_context *ctx;
4615 struct file_lock fl;
4616 const struct nfs_server *server;
4617 unsigned long timestamp;
4620 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4621 struct nfs_open_context *ctx,
4622 struct nfs4_lock_state *lsp,
4623 struct nfs_seqid *seqid)
4625 struct nfs4_unlockdata *p;
4626 struct inode *inode = lsp->ls_state->inode;
4628 p = kzalloc(sizeof(*p), GFP_NOFS);
4631 p->arg.fh = NFS_FH(inode);
4633 p->arg.seqid = seqid;
4634 p->res.seqid = seqid;
4635 p->arg.stateid = &lsp->ls_stateid;
4637 atomic_inc(&lsp->ls_count);
4638 /* Ensure we don't close file until we're done freeing locks! */
4639 p->ctx = get_nfs_open_context(ctx);
4640 memcpy(&p->fl, fl, sizeof(p->fl));
4641 p->server = NFS_SERVER(inode);
4645 static void nfs4_locku_release_calldata(void *data)
4647 struct nfs4_unlockdata *calldata = data;
4648 nfs_free_seqid(calldata->arg.seqid);
4649 nfs4_put_lock_state(calldata->lsp);
4650 put_nfs_open_context(calldata->ctx);
4654 static void nfs4_locku_done(struct rpc_task *task, void *data)
4656 struct nfs4_unlockdata *calldata = data;
4658 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4660 switch (task->tk_status) {
4662 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4663 &calldata->res.stateid);
4664 renew_lease(calldata->server, calldata->timestamp);
4666 case -NFS4ERR_BAD_STATEID:
4667 case -NFS4ERR_OLD_STATEID:
4668 case -NFS4ERR_STALE_STATEID:
4669 case -NFS4ERR_EXPIRED:
4672 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4673 rpc_restart_call_prepare(task);
4675 nfs_release_seqid(calldata->arg.seqid);
4678 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4680 struct nfs4_unlockdata *calldata = data;
4682 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4684 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
4685 /* Note: exit _without_ running nfs4_locku_done */
4688 calldata->timestamp = jiffies;
4689 if (nfs4_setup_sequence(calldata->server,
4690 &calldata->arg.seq_args,
4691 &calldata->res.seq_res,
4693 nfs_release_seqid(calldata->arg.seqid);
4696 task->tk_action = NULL;
4698 nfs4_sequence_done(task, &calldata->res.seq_res);
4701 static const struct rpc_call_ops nfs4_locku_ops = {
4702 .rpc_call_prepare = nfs4_locku_prepare,
4703 .rpc_call_done = nfs4_locku_done,
4704 .rpc_release = nfs4_locku_release_calldata,
4707 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4708 struct nfs_open_context *ctx,
4709 struct nfs4_lock_state *lsp,
4710 struct nfs_seqid *seqid)
4712 struct nfs4_unlockdata *data;
4713 struct rpc_message msg = {
4714 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4715 .rpc_cred = ctx->cred,
4717 struct rpc_task_setup task_setup_data = {
4718 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4719 .rpc_message = &msg,
4720 .callback_ops = &nfs4_locku_ops,
4721 .workqueue = nfsiod_workqueue,
4722 .flags = RPC_TASK_ASYNC,
4725 /* Ensure this is an unlock - when canceling a lock, the
4726 * canceled lock is passed in, and it won't be an unlock.
4728 fl->fl_type = F_UNLCK;
4730 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4732 nfs_free_seqid(seqid);
4733 return ERR_PTR(-ENOMEM);
4736 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4737 msg.rpc_argp = &data->arg;
4738 msg.rpc_resp = &data->res;
4739 task_setup_data.callback_data = data;
4740 return rpc_run_task(&task_setup_data);
4743 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4745 struct inode *inode = state->inode;
4746 struct nfs4_state_owner *sp = state->owner;
4747 struct nfs_inode *nfsi = NFS_I(inode);
4748 struct nfs_seqid *seqid;
4749 struct nfs4_lock_state *lsp;
4750 struct rpc_task *task;
4752 unsigned char fl_flags = request->fl_flags;
4754 status = nfs4_set_lock_state(state, request);
4755 /* Unlock _before_ we do the RPC call */
4756 request->fl_flags |= FL_EXISTS;
4757 /* Exclude nfs_delegation_claim_locks() */
4758 mutex_lock(&sp->so_delegreturn_mutex);
4759 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
4760 down_read(&nfsi->rwsem);
4761 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4762 up_read(&nfsi->rwsem);
4763 mutex_unlock(&sp->so_delegreturn_mutex);
4766 up_read(&nfsi->rwsem);
4767 mutex_unlock(&sp->so_delegreturn_mutex);
4770 /* Is this a delegated lock? */
4771 lsp = request->fl_u.nfs4_fl.owner;
4772 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
4774 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4778 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4779 status = PTR_ERR(task);
4782 status = nfs4_wait_for_completion_rpc_task(task);
4785 request->fl_flags = fl_flags;
4789 struct nfs4_lockdata {
4790 struct nfs_lock_args arg;
4791 struct nfs_lock_res res;
4792 struct nfs4_lock_state *lsp;
4793 struct nfs_open_context *ctx;
4794 struct file_lock fl;
4795 unsigned long timestamp;
4798 struct nfs_server *server;
4801 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4802 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4805 struct nfs4_lockdata *p;
4806 struct inode *inode = lsp->ls_state->inode;
4807 struct nfs_server *server = NFS_SERVER(inode);
4809 p = kzalloc(sizeof(*p), gfp_mask);
4813 p->arg.fh = NFS_FH(inode);
4815 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4816 if (p->arg.open_seqid == NULL)
4818 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4819 if (p->arg.lock_seqid == NULL)
4820 goto out_free_seqid;
4821 p->arg.lock_stateid = &lsp->ls_stateid;
4822 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4823 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
4824 p->arg.lock_owner.s_dev = server->s_dev;
4825 p->res.lock_seqid = p->arg.lock_seqid;
4828 atomic_inc(&lsp->ls_count);
4829 p->ctx = get_nfs_open_context(ctx);
4830 memcpy(&p->fl, fl, sizeof(p->fl));
4833 nfs_free_seqid(p->arg.open_seqid);
4839 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4841 struct nfs4_lockdata *data = calldata;
4842 struct nfs4_state *state = data->lsp->ls_state;
4844 dprintk("%s: begin!\n", __func__);
4845 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4847 /* Do we need to do an open_to_lock_owner? */
4848 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4849 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
4850 goto out_release_lock_seqid;
4852 data->arg.open_stateid = &state->open_stateid;
4853 data->arg.new_lock_owner = 1;
4854 data->res.open_seqid = data->arg.open_seqid;
4856 data->arg.new_lock_owner = 0;
4857 if (!nfs4_valid_open_stateid(state)) {
4858 data->rpc_status = -EBADF;
4859 task->tk_action = NULL;
4860 goto out_release_open_seqid;
4862 data->timestamp = jiffies;
4863 if (nfs4_setup_sequence(data->server,
4864 &data->arg.seq_args,
4868 out_release_open_seqid:
4869 nfs_release_seqid(data->arg.open_seqid);
4870 out_release_lock_seqid:
4871 nfs_release_seqid(data->arg.lock_seqid);
4873 nfs4_sequence_done(task, &data->res.seq_res);
4874 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4877 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4879 struct nfs4_lockdata *data = calldata;
4881 dprintk("%s: begin!\n", __func__);
4883 if (!nfs4_sequence_done(task, &data->res.seq_res))
4886 data->rpc_status = task->tk_status;
4887 if (data->arg.new_lock_owner != 0) {
4888 if (data->rpc_status == 0)
4889 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4893 if (data->rpc_status == 0) {
4894 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
4895 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
4896 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4899 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4902 static void nfs4_lock_release(void *calldata)
4904 struct nfs4_lockdata *data = calldata;
4906 dprintk("%s: begin!\n", __func__);
4907 nfs_free_seqid(data->arg.open_seqid);
4908 if (data->cancelled != 0) {
4909 struct rpc_task *task;
4910 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4911 data->arg.lock_seqid);
4913 rpc_put_task_async(task);
4914 dprintk("%s: cancelling lock!\n", __func__);
4916 nfs_free_seqid(data->arg.lock_seqid);
4917 nfs4_put_lock_state(data->lsp);
4918 put_nfs_open_context(data->ctx);
4920 dprintk("%s: done!\n", __func__);
4923 static const struct rpc_call_ops nfs4_lock_ops = {
4924 .rpc_call_prepare = nfs4_lock_prepare,
4925 .rpc_call_done = nfs4_lock_done,
4926 .rpc_release = nfs4_lock_release,
4929 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4932 case -NFS4ERR_ADMIN_REVOKED:
4933 case -NFS4ERR_BAD_STATEID:
4934 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4935 if (new_lock_owner != 0 ||
4936 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
4937 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4939 case -NFS4ERR_STALE_STATEID:
4940 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4941 case -NFS4ERR_EXPIRED:
4942 nfs4_schedule_lease_recovery(server->nfs_client);
4946 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4948 struct nfs4_lockdata *data;
4949 struct rpc_task *task;
4950 struct rpc_message msg = {
4951 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4952 .rpc_cred = state->owner->so_cred,
4954 struct rpc_task_setup task_setup_data = {
4955 .rpc_client = NFS_CLIENT(state->inode),
4956 .rpc_message = &msg,
4957 .callback_ops = &nfs4_lock_ops,
4958 .workqueue = nfsiod_workqueue,
4959 .flags = RPC_TASK_ASYNC,
4963 dprintk("%s: begin!\n", __func__);
4964 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4965 fl->fl_u.nfs4_fl.owner,
4966 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4970 data->arg.block = 1;
4971 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4972 msg.rpc_argp = &data->arg;
4973 msg.rpc_resp = &data->res;
4974 task_setup_data.callback_data = data;
4975 if (recovery_type > NFS_LOCK_NEW) {
4976 if (recovery_type == NFS_LOCK_RECLAIM)
4977 data->arg.reclaim = NFS_LOCK_RECLAIM;
4978 nfs4_set_sequence_privileged(&data->arg.seq_args);
4980 task = rpc_run_task(&task_setup_data);
4982 return PTR_ERR(task);
4983 ret = nfs4_wait_for_completion_rpc_task(task);
4985 ret = data->rpc_status;
4987 nfs4_handle_setlk_error(data->server, data->lsp,
4988 data->arg.new_lock_owner, ret);
4990 data->cancelled = 1;
4992 dprintk("%s: done, ret = %d!\n", __func__, ret);
4996 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4998 struct nfs_server *server = NFS_SERVER(state->inode);
4999 struct nfs4_exception exception = {
5000 .inode = state->inode,
5005 /* Cache the lock if possible... */
5006 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5008 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
5009 if (err != -NFS4ERR_DELAY)
5011 nfs4_handle_exception(server, err, &exception);
5012 } while (exception.retry);
5016 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5018 struct nfs_server *server = NFS_SERVER(state->inode);
5019 struct nfs4_exception exception = {
5020 .inode = state->inode,
5024 err = nfs4_set_lock_state(state, request);
5028 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5030 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
5034 case -NFS4ERR_GRACE:
5035 case -NFS4ERR_DELAY:
5036 nfs4_handle_exception(server, err, &exception);
5039 } while (exception.retry);
5044 #if defined(CONFIG_NFS_V4_1)
5046 * nfs41_check_expired_locks - possibly free a lock stateid
5048 * @state: NFSv4 state for an inode
5050 * Returns NFS_OK if recovery for this stateid is now finished.
5051 * Otherwise a negative NFS4ERR value is returned.
5053 static int nfs41_check_expired_locks(struct nfs4_state *state)
5055 int status, ret = -NFS4ERR_BAD_STATEID;
5056 struct nfs4_lock_state *lsp;
5057 struct nfs_server *server = NFS_SERVER(state->inode);
5059 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
5060 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
5061 status = nfs41_test_stateid(server, &lsp->ls_stateid);
5062 if (status != NFS_OK) {
5063 /* Free the stateid unless the server
5064 * informs us the stateid is unrecognized. */
5065 if (status != -NFS4ERR_BAD_STATEID)
5066 nfs41_free_stateid(server,
5068 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5077 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5079 int status = NFS_OK;
5081 if (test_bit(LK_STATE_IN_USE, &state->flags))
5082 status = nfs41_check_expired_locks(state);
5083 if (status != NFS_OK)
5084 status = nfs4_lock_expired(state, request);
5089 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5091 struct nfs4_state_owner *sp = state->owner;
5092 struct nfs_inode *nfsi = NFS_I(state->inode);
5093 unsigned char fl_flags = request->fl_flags;
5095 int status = -ENOLCK;
5097 if ((fl_flags & FL_POSIX) &&
5098 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5100 /* Is this a delegated open? */
5101 status = nfs4_set_lock_state(state, request);
5104 request->fl_flags |= FL_ACCESS;
5105 status = do_vfs_lock(request->fl_file, request);
5108 down_read(&nfsi->rwsem);
5109 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
5110 /* Yes: cache locks! */
5111 /* ...but avoid races with delegation recall... */
5112 request->fl_flags = fl_flags & ~FL_SLEEP;
5113 status = do_vfs_lock(request->fl_file, request);
5116 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5117 up_read(&nfsi->rwsem);
5118 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
5121 down_read(&nfsi->rwsem);
5122 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5123 status = -NFS4ERR_DELAY;
5126 /* Note: we always want to sleep here! */
5127 request->fl_flags = fl_flags | FL_SLEEP;
5128 if (do_vfs_lock(request->fl_file, request) < 0)
5129 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5130 "manager!\n", __func__);
5132 up_read(&nfsi->rwsem);
5134 request->fl_flags = fl_flags;
5138 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5140 struct nfs4_exception exception = {
5142 .inode = state->inode,
5147 err = _nfs4_proc_setlk(state, cmd, request);
5148 if (err == -NFS4ERR_DENIED)
5150 err = nfs4_handle_exception(NFS_SERVER(state->inode),
5152 } while (exception.retry);
5157 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5159 struct nfs_open_context *ctx;
5160 struct nfs4_state *state;
5161 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5164 /* verify open state */
5165 ctx = nfs_file_open_context(filp);
5168 if (request->fl_start < 0 || request->fl_end < 0)
5171 if (IS_GETLK(cmd)) {
5173 return nfs4_proc_getlk(state, F_GETLK, request);
5177 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5180 if (request->fl_type == F_UNLCK) {
5182 return nfs4_proc_unlck(state, cmd, request);
5189 * Don't rely on the VFS having checked the file open mode,
5190 * since it won't do this for flock() locks.
5192 switch (request->fl_type) {
5194 if (!(filp->f_mode & FMODE_READ))
5198 if (!(filp->f_mode & FMODE_WRITE))
5203 status = nfs4_proc_setlk(state, cmd, request);
5204 if ((status != -EAGAIN) || IS_SETLK(cmd))
5206 timeout = nfs4_set_lock_task_retry(timeout);
5207 status = -ERESTARTSYS;
5210 } while(status < 0);
5214 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
5216 struct nfs_server *server = NFS_SERVER(state->inode);
5219 err = nfs4_set_lock_state(state, fl);
5222 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
5223 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
5226 struct nfs_release_lockowner_data {
5227 struct nfs4_lock_state *lsp;
5228 struct nfs_server *server;
5229 struct nfs_release_lockowner_args args;
5232 static void nfs4_release_lockowner_release(void *calldata)
5234 struct nfs_release_lockowner_data *data = calldata;
5235 nfs4_free_lock_state(data->server, data->lsp);
5239 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
5240 .rpc_release = nfs4_release_lockowner_release,
5243 static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
5245 struct nfs_release_lockowner_data *data;
5246 struct rpc_message msg = {
5247 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5250 if (server->nfs_client->cl_mvops->minor_version != 0)
5252 data = kmalloc(sizeof(*data), GFP_NOFS);
5256 data->server = server;
5257 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5258 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5259 data->args.lock_owner.s_dev = server->s_dev;
5260 msg.rpc_argp = &data->args;
5261 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5265 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5267 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5268 const void *buf, size_t buflen,
5269 int flags, int type)
5271 if (strcmp(key, "") != 0)
5274 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
5277 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5278 void *buf, size_t buflen, int type)
5280 if (strcmp(key, "") != 0)
5283 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
5286 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5287 size_t list_len, const char *name,
5288 size_t name_len, int type)
5290 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
5292 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5295 if (list && len <= list_len)
5296 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
5301 * nfs_fhget will use either the mounted_on_fileid or the fileid
5303 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5305 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5306 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5307 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
5308 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
5311 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
5312 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
5313 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5317 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5318 const struct qstr *name,
5319 struct nfs4_fs_locations *fs_locations,
5322 struct nfs_server *server = NFS_SERVER(dir);
5324 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
5326 struct nfs4_fs_locations_arg args = {
5327 .dir_fh = NFS_FH(dir),
5332 struct nfs4_fs_locations_res res = {
5333 .fs_locations = fs_locations,
5335 struct rpc_message msg = {
5336 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5342 dprintk("%s: start\n", __func__);
5344 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5345 * is not supported */
5346 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5347 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5349 bitmask[0] |= FATTR4_WORD0_FILEID;
5351 nfs_fattr_init(&fs_locations->fattr);
5352 fs_locations->server = server;
5353 fs_locations->nlocations = 0;
5354 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
5355 dprintk("%s: returned status = %d\n", __func__, status);
5359 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5360 const struct qstr *name,
5361 struct nfs4_fs_locations *fs_locations,
5364 struct nfs4_exception exception = { };
5367 err = nfs4_handle_exception(NFS_SERVER(dir),
5368 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
5370 } while (exception.retry);
5374 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5377 struct nfs4_secinfo_arg args = {
5378 .dir_fh = NFS_FH(dir),
5381 struct nfs4_secinfo_res res = {
5384 struct rpc_message msg = {
5385 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5390 dprintk("NFS call secinfo %s\n", name->name);
5391 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5392 dprintk("NFS reply secinfo: %d\n", status);
5396 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5397 struct nfs4_secinfo_flavors *flavors)
5399 struct nfs4_exception exception = { };
5402 err = nfs4_handle_exception(NFS_SERVER(dir),
5403 _nfs4_proc_secinfo(dir, name, flavors),
5405 } while (exception.retry);
5409 #ifdef CONFIG_NFS_V4_1
5411 * Check the exchange flags returned by the server for invalid flags, having
5412 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5415 static int nfs4_check_cl_exchange_flags(u32 flags)
5417 if (flags & ~EXCHGID4_FLAG_MASK_R)
5419 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5420 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5422 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5426 return -NFS4ERR_INVAL;
5430 nfs41_same_server_scope(struct nfs41_server_scope *a,
5431 struct nfs41_server_scope *b)
5433 if (a->server_scope_sz == b->server_scope_sz &&
5434 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5441 * nfs4_proc_bind_conn_to_session()
5443 * The 4.1 client currently uses the same TCP connection for the
5444 * fore and backchannel.
5446 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
5449 struct nfs41_bind_conn_to_session_res res;
5450 struct rpc_message msg = {
5452 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5458 dprintk("--> %s\n", __func__);
5460 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5461 if (unlikely(res.session == NULL)) {
5466 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5468 if (memcmp(res.session->sess_id.data,
5469 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5470 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5474 if (res.dir != NFS4_CDFS4_BOTH) {
5475 dprintk("NFS: %s: Unexpected direction from server\n",
5480 if (res.use_conn_in_rdma_mode) {
5481 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5490 dprintk("<-- %s status= %d\n", __func__, status);
5495 * nfs4_proc_exchange_id()
5497 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5499 * Since the clientid has expired, all compounds using sessions
5500 * associated with the stale clientid will be returning
5501 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5502 * be in some phase of session reset.
5504 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
5506 nfs4_verifier verifier;
5507 struct nfs41_exchange_id_args args = {
5508 .verifier = &verifier,
5510 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
5512 struct nfs41_exchange_id_res res = {
5516 struct rpc_message msg = {
5517 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5523 nfs4_init_boot_verifier(clp, &verifier);
5524 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5526 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5527 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5528 args.id_len, args.id);
5530 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
5532 if (unlikely(res.server_owner == NULL)) {
5537 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
5539 if (unlikely(res.server_scope == NULL)) {
5541 goto out_server_owner;
5544 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
5545 if (unlikely(res.impl_id == NULL)) {
5547 goto out_server_scope;
5550 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5552 status = nfs4_check_cl_exchange_flags(res.flags);
5555 clp->cl_clientid = res.clientid;
5556 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5557 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5558 clp->cl_seqid = res.seqid;
5560 kfree(clp->cl_serverowner);
5561 clp->cl_serverowner = res.server_owner;
5562 res.server_owner = NULL;
5564 /* use the most recent implementation id */
5565 kfree(clp->cl_implid);
5566 clp->cl_implid = res.impl_id;
5568 if (clp->cl_serverscope != NULL &&
5569 !nfs41_same_server_scope(clp->cl_serverscope,
5570 res.server_scope)) {
5571 dprintk("%s: server_scope mismatch detected\n",
5573 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
5574 kfree(clp->cl_serverscope);
5575 clp->cl_serverscope = NULL;
5578 if (clp->cl_serverscope == NULL) {
5579 clp->cl_serverscope = res.server_scope;
5586 kfree(res.server_owner);
5588 kfree(res.server_scope);
5590 if (clp->cl_implid != NULL)
5591 dprintk("NFS reply exchange_id: Server Implementation ID: "
5592 "domain: %s, name: %s, date: %llu,%u\n",
5593 clp->cl_implid->domain, clp->cl_implid->name,
5594 clp->cl_implid->date.seconds,
5595 clp->cl_implid->date.nseconds);
5596 dprintk("NFS reply exchange_id: %d\n", status);
5600 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5601 struct rpc_cred *cred)
5603 struct rpc_message msg = {
5604 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5610 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5612 dprintk("NFS: Got error %d from the server %s on "
5613 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5617 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5618 struct rpc_cred *cred)
5623 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5624 ret = _nfs4_proc_destroy_clientid(clp, cred);
5626 case -NFS4ERR_DELAY:
5627 case -NFS4ERR_CLIENTID_BUSY:
5637 int nfs4_destroy_clientid(struct nfs_client *clp)
5639 struct rpc_cred *cred;
5642 if (clp->cl_mvops->minor_version < 1)
5644 if (clp->cl_exchange_flags == 0)
5646 if (clp->cl_preserve_clid)
5648 cred = nfs4_get_exchange_id_cred(clp);
5649 ret = nfs4_proc_destroy_clientid(clp, cred);
5654 case -NFS4ERR_STALE_CLIENTID:
5655 clp->cl_exchange_flags = 0;
5661 struct nfs4_get_lease_time_data {
5662 struct nfs4_get_lease_time_args *args;
5663 struct nfs4_get_lease_time_res *res;
5664 struct nfs_client *clp;
5667 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5670 struct nfs4_get_lease_time_data *data =
5671 (struct nfs4_get_lease_time_data *)calldata;
5673 dprintk("--> %s\n", __func__);
5674 /* just setup sequence, do not trigger session recovery
5675 since we're invoked within one */
5676 nfs41_setup_sequence(data->clp->cl_session,
5677 &data->args->la_seq_args,
5678 &data->res->lr_seq_res,
5680 dprintk("<-- %s\n", __func__);
5684 * Called from nfs4_state_manager thread for session setup, so don't recover
5685 * from sequence operation or clientid errors.
5687 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5689 struct nfs4_get_lease_time_data *data =
5690 (struct nfs4_get_lease_time_data *)calldata;
5692 dprintk("--> %s\n", __func__);
5693 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5695 switch (task->tk_status) {
5696 case -NFS4ERR_DELAY:
5697 case -NFS4ERR_GRACE:
5698 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5699 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5700 task->tk_status = 0;
5702 case -NFS4ERR_RETRY_UNCACHED_REP:
5703 rpc_restart_call_prepare(task);
5706 dprintk("<-- %s\n", __func__);
5709 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
5710 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5711 .rpc_call_done = nfs4_get_lease_time_done,
5714 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5716 struct rpc_task *task;
5717 struct nfs4_get_lease_time_args args;
5718 struct nfs4_get_lease_time_res res = {
5719 .lr_fsinfo = fsinfo,
5721 struct nfs4_get_lease_time_data data = {
5726 struct rpc_message msg = {
5727 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5731 struct rpc_task_setup task_setup = {
5732 .rpc_client = clp->cl_rpcclient,
5733 .rpc_message = &msg,
5734 .callback_ops = &nfs4_get_lease_time_ops,
5735 .callback_data = &data,
5736 .flags = RPC_TASK_TIMEOUT,
5740 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
5741 nfs4_set_sequence_privileged(&args.la_seq_args);
5742 dprintk("--> %s\n", __func__);
5743 task = rpc_run_task(&task_setup);
5746 status = PTR_ERR(task);
5748 status = task->tk_status;
5751 dprintk("<-- %s return %d\n", __func__, status);
5757 * Initialize the values to be used by the client in CREATE_SESSION
5758 * If nfs4_init_session set the fore channel request and response sizes,
5761 * Set the back channel max_resp_sz_cached to zero to force the client to
5762 * always set csa_cachethis to FALSE because the current implementation
5763 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5765 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5767 struct nfs4_session *session = args->client->cl_session;
5768 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5769 mxresp_sz = session->fc_target_max_resp_sz;
5772 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5774 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5775 /* Fore channel attributes */
5776 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5777 args->fc_attrs.max_resp_sz = mxresp_sz;
5778 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5779 args->fc_attrs.max_reqs = max_session_slots;
5781 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5782 "max_ops=%u max_reqs=%u\n",
5784 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5785 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5787 /* Back channel attributes */
5788 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5789 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5790 args->bc_attrs.max_resp_sz_cached = 0;
5791 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5792 args->bc_attrs.max_reqs = 1;
5794 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5795 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5797 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5798 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5799 args->bc_attrs.max_reqs);
5802 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5804 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5805 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5807 if (rcvd->max_resp_sz > sent->max_resp_sz)
5810 * Our requested max_ops is the minimum we need; we're not
5811 * prepared to break up compounds into smaller pieces than that.
5812 * So, no point even trying to continue if the server won't
5815 if (rcvd->max_ops < sent->max_ops)
5817 if (rcvd->max_reqs == 0)
5819 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5820 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
5824 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5826 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5827 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5829 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5831 if (rcvd->max_resp_sz < sent->max_resp_sz)
5833 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5835 /* These would render the backchannel useless: */
5836 if (rcvd->max_ops != sent->max_ops)
5838 if (rcvd->max_reqs != sent->max_reqs)
5843 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5844 struct nfs4_session *session)
5848 ret = nfs4_verify_fore_channel_attrs(args, session);
5851 return nfs4_verify_back_channel_attrs(args, session);
5854 static int _nfs4_proc_create_session(struct nfs_client *clp,
5855 struct rpc_cred *cred)
5857 struct nfs4_session *session = clp->cl_session;
5858 struct nfs41_create_session_args args = {
5860 .cb_program = NFS4_CALLBACK,
5862 struct nfs41_create_session_res res = {
5865 struct rpc_message msg = {
5866 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5873 nfs4_init_channel_attrs(&args);
5874 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5876 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5879 /* Verify the session's negotiated channel_attrs values */
5880 status = nfs4_verify_channel_attrs(&args, session);
5881 /* Increment the clientid slot sequence id */
5889 * Issues a CREATE_SESSION operation to the server.
5890 * It is the responsibility of the caller to verify the session is
5891 * expired before calling this routine.
5893 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
5897 struct nfs4_session *session = clp->cl_session;
5899 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5901 status = _nfs4_proc_create_session(clp, cred);
5905 /* Init or reset the session slot tables */
5906 status = nfs4_setup_session_slot_tables(session);
5907 dprintk("slot table setup returned %d\n", status);
5911 ptr = (unsigned *)&session->sess_id.data[0];
5912 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5913 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5915 dprintk("<-- %s\n", __func__);
5920 * Issue the over-the-wire RPC DESTROY_SESSION.
5921 * The caller must serialize access to this routine.
5923 int nfs4_proc_destroy_session(struct nfs4_session *session,
5924 struct rpc_cred *cred)
5926 struct rpc_message msg = {
5927 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5928 .rpc_argp = session,
5933 dprintk("--> nfs4_proc_destroy_session\n");
5935 /* session is still being setup */
5936 if (session->clp->cl_cons_state != NFS_CS_READY)
5939 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5942 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
5943 "Session has been destroyed regardless...\n", status);
5945 dprintk("<-- nfs4_proc_destroy_session\n");
5950 * Renew the cl_session lease.
5952 struct nfs4_sequence_data {
5953 struct nfs_client *clp;
5954 struct nfs4_sequence_args args;
5955 struct nfs4_sequence_res res;
5958 static void nfs41_sequence_release(void *data)
5960 struct nfs4_sequence_data *calldata = data;
5961 struct nfs_client *clp = calldata->clp;
5963 if (atomic_read(&clp->cl_count) > 1)
5964 nfs4_schedule_state_renewal(clp);
5965 nfs_put_client(clp);
5969 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5971 switch(task->tk_status) {
5972 case -NFS4ERR_DELAY:
5973 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5976 nfs4_schedule_lease_recovery(clp);
5981 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5983 struct nfs4_sequence_data *calldata = data;
5984 struct nfs_client *clp = calldata->clp;
5986 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5989 if (task->tk_status < 0) {
5990 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5991 if (atomic_read(&clp->cl_count) == 1)
5994 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5995 rpc_restart_call_prepare(task);
5999 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
6001 dprintk("<-- %s\n", __func__);
6004 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6006 struct nfs4_sequence_data *calldata = data;
6007 struct nfs_client *clp = calldata->clp;
6008 struct nfs4_sequence_args *args;
6009 struct nfs4_sequence_res *res;
6011 args = task->tk_msg.rpc_argp;
6012 res = task->tk_msg.rpc_resp;
6014 nfs41_setup_sequence(clp->cl_session, args, res, task);
6017 static const struct rpc_call_ops nfs41_sequence_ops = {
6018 .rpc_call_done = nfs41_sequence_call_done,
6019 .rpc_call_prepare = nfs41_sequence_prepare,
6020 .rpc_release = nfs41_sequence_release,
6023 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
6024 struct rpc_cred *cred,
6027 struct nfs4_sequence_data *calldata;
6028 struct rpc_message msg = {
6029 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6032 struct rpc_task_setup task_setup_data = {
6033 .rpc_client = clp->cl_rpcclient,
6034 .rpc_message = &msg,
6035 .callback_ops = &nfs41_sequence_ops,
6036 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
6039 if (!atomic_inc_not_zero(&clp->cl_count))
6040 return ERR_PTR(-EIO);
6041 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
6042 if (calldata == NULL) {
6043 nfs_put_client(clp);
6044 return ERR_PTR(-ENOMEM);
6046 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
6048 nfs4_set_sequence_privileged(&calldata->args);
6049 msg.rpc_argp = &calldata->args;
6050 msg.rpc_resp = &calldata->res;
6051 calldata->clp = clp;
6052 task_setup_data.callback_data = calldata;
6054 return rpc_run_task(&task_setup_data);
6057 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
6059 struct rpc_task *task;
6062 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6064 task = _nfs41_proc_sequence(clp, cred, false);
6066 ret = PTR_ERR(task);
6068 rpc_put_task_async(task);
6069 dprintk("<-- %s status=%d\n", __func__, ret);
6073 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6075 struct rpc_task *task;
6078 task = _nfs41_proc_sequence(clp, cred, true);
6080 ret = PTR_ERR(task);
6083 ret = rpc_wait_for_completion_task(task);
6085 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6087 if (task->tk_status == 0)
6088 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
6089 ret = task->tk_status;
6093 dprintk("<-- %s status=%d\n", __func__, ret);
6097 struct nfs4_reclaim_complete_data {
6098 struct nfs_client *clp;
6099 struct nfs41_reclaim_complete_args arg;
6100 struct nfs41_reclaim_complete_res res;
6103 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6105 struct nfs4_reclaim_complete_data *calldata = data;
6107 nfs41_setup_sequence(calldata->clp->cl_session,
6108 &calldata->arg.seq_args,
6109 &calldata->res.seq_res,
6113 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6115 switch(task->tk_status) {
6117 case -NFS4ERR_COMPLETE_ALREADY:
6118 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6120 case -NFS4ERR_DELAY:
6121 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6123 case -NFS4ERR_RETRY_UNCACHED_REP:
6126 nfs4_schedule_lease_recovery(clp);
6131 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6133 struct nfs4_reclaim_complete_data *calldata = data;
6134 struct nfs_client *clp = calldata->clp;
6135 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6137 dprintk("--> %s\n", __func__);
6138 if (!nfs41_sequence_done(task, res))
6141 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6142 rpc_restart_call_prepare(task);
6145 dprintk("<-- %s\n", __func__);
6148 static void nfs4_free_reclaim_complete_data(void *data)
6150 struct nfs4_reclaim_complete_data *calldata = data;
6155 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6156 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6157 .rpc_call_done = nfs4_reclaim_complete_done,
6158 .rpc_release = nfs4_free_reclaim_complete_data,
6162 * Issue a global reclaim complete.
6164 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6166 struct nfs4_reclaim_complete_data *calldata;
6167 struct rpc_task *task;
6168 struct rpc_message msg = {
6169 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6171 struct rpc_task_setup task_setup_data = {
6172 .rpc_client = clp->cl_rpcclient,
6173 .rpc_message = &msg,
6174 .callback_ops = &nfs4_reclaim_complete_call_ops,
6175 .flags = RPC_TASK_ASYNC,
6177 int status = -ENOMEM;
6179 dprintk("--> %s\n", __func__);
6180 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
6181 if (calldata == NULL)
6183 calldata->clp = clp;
6184 calldata->arg.one_fs = 0;
6186 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
6187 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
6188 msg.rpc_argp = &calldata->arg;
6189 msg.rpc_resp = &calldata->res;
6190 task_setup_data.callback_data = calldata;
6191 task = rpc_run_task(&task_setup_data);
6193 status = PTR_ERR(task);
6196 status = nfs4_wait_for_completion_rpc_task(task);
6198 status = task->tk_status;
6202 dprintk("<-- %s status=%d\n", __func__, status);
6207 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6209 struct nfs4_layoutget *lgp = calldata;
6210 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6211 struct nfs4_session *session = nfs4_get_session(server);
6213 dprintk("--> %s\n", __func__);
6214 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6215 * right now covering the LAYOUTGET we are about to send.
6216 * However, that is not so catastrophic, and there seems
6217 * to be no way to prevent it completely.
6219 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
6220 &lgp->res.seq_res, task))
6222 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6223 NFS_I(lgp->args.inode)->layout,
6224 lgp->args.ctx->state)) {
6225 rpc_exit(task, NFS4_OK);
6229 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6231 struct nfs4_layoutget *lgp = calldata;
6232 struct inode *inode = lgp->args.inode;
6233 struct nfs_server *server = NFS_SERVER(inode);
6234 struct pnfs_layout_hdr *lo;
6235 struct nfs4_state *state = NULL;
6236 unsigned long timeo, now, giveup;
6238 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
6240 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
6243 switch (task->tk_status) {
6247 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
6248 * (or clients) writing to the same RAID stripe
6250 case -NFS4ERR_LAYOUTTRYLATER:
6252 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
6253 * existing layout before getting a new one).
6255 case -NFS4ERR_RECALLCONFLICT:
6256 timeo = rpc_get_timeout(task->tk_client);
6257 giveup = lgp->args.timestamp + timeo;
6259 if (time_after(giveup, now)) {
6260 unsigned long delay;
6263 * - Not less then NFS4_POLL_RETRY_MIN.
6264 * - One last time a jiffie before we give up
6265 * - exponential backoff (time_now minus start_attempt)
6267 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
6268 min((giveup - now - 1),
6269 now - lgp->args.timestamp));
6271 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
6273 rpc_delay(task, delay);
6274 task->tk_status = 0;
6275 rpc_restart_call_prepare(task);
6276 goto out; /* Do not call nfs4_async_handle_error() */
6279 case -NFS4ERR_EXPIRED:
6280 case -NFS4ERR_BAD_STATEID:
6281 spin_lock(&inode->i_lock);
6282 lo = NFS_I(inode)->layout;
6283 if (!lo || list_empty(&lo->plh_segs)) {
6284 spin_unlock(&inode->i_lock);
6285 /* If the open stateid was bad, then recover it. */
6286 state = lgp->args.ctx->state;
6290 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6291 spin_unlock(&inode->i_lock);
6292 /* Mark the bad layout state as invalid, then
6293 * retry using the open stateid. */
6294 pnfs_free_lseg_list(&head);
6297 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6298 rpc_restart_call_prepare(task);
6300 dprintk("<-- %s\n", __func__);
6303 static size_t max_response_pages(struct nfs_server *server)
6305 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6306 return nfs_page_array_len(0, max_resp_sz);
6309 static void nfs4_free_pages(struct page **pages, size_t size)
6316 for (i = 0; i < size; i++) {
6319 __free_page(pages[i]);
6324 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6326 struct page **pages;
6329 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6331 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6335 for (i = 0; i < size; i++) {
6336 pages[i] = alloc_page(gfp_flags);
6338 dprintk("%s: failed to allocate page\n", __func__);
6339 nfs4_free_pages(pages, size);
6347 static void nfs4_layoutget_release(void *calldata)
6349 struct nfs4_layoutget *lgp = calldata;
6350 struct inode *inode = lgp->args.inode;
6351 struct nfs_server *server = NFS_SERVER(inode);
6352 size_t max_pages = max_response_pages(server);
6354 dprintk("--> %s\n", __func__);
6355 nfs4_free_pages(lgp->args.layout.pages, max_pages);
6356 pnfs_put_layout_hdr(NFS_I(inode)->layout);
6357 put_nfs_open_context(lgp->args.ctx);
6359 dprintk("<-- %s\n", __func__);
6362 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6363 .rpc_call_prepare = nfs4_layoutget_prepare,
6364 .rpc_call_done = nfs4_layoutget_done,
6365 .rpc_release = nfs4_layoutget_release,
6368 struct pnfs_layout_segment *
6369 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
6371 struct inode *inode = lgp->args.inode;
6372 struct nfs_server *server = NFS_SERVER(inode);
6373 size_t max_pages = max_response_pages(server);
6374 struct rpc_task *task;
6375 struct rpc_message msg = {
6376 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6377 .rpc_argp = &lgp->args,
6378 .rpc_resp = &lgp->res,
6380 struct rpc_task_setup task_setup_data = {
6381 .rpc_client = server->client,
6382 .rpc_message = &msg,
6383 .callback_ops = &nfs4_layoutget_call_ops,
6384 .callback_data = lgp,
6385 .flags = RPC_TASK_ASYNC,
6387 struct pnfs_layout_segment *lseg = NULL;
6390 dprintk("--> %s\n", __func__);
6392 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6393 if (!lgp->args.layout.pages) {
6394 nfs4_layoutget_release(lgp);
6395 return ERR_PTR(-ENOMEM);
6397 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
6398 lgp->args.timestamp = jiffies;
6400 lgp->res.layoutp = &lgp->args.layout;
6401 lgp->res.seq_res.sr_slot = NULL;
6402 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
6404 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6405 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6407 task = rpc_run_task(&task_setup_data);
6409 return ERR_CAST(task);
6410 status = nfs4_wait_for_completion_rpc_task(task);
6412 status = task->tk_status;
6413 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6414 if (status == 0 && lgp->res.layoutp->len)
6415 lseg = pnfs_layout_process(lgp);
6417 dprintk("<-- %s status=%d\n", __func__, status);
6419 return ERR_PTR(status);
6424 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6426 struct nfs4_layoutreturn *lrp = calldata;
6428 dprintk("--> %s\n", __func__);
6429 nfs41_setup_sequence(lrp->clp->cl_session,
6430 &lrp->args.seq_args,
6435 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6437 struct nfs4_layoutreturn *lrp = calldata;
6438 struct nfs_server *server;
6440 dprintk("--> %s\n", __func__);
6442 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
6445 server = NFS_SERVER(lrp->args.inode);
6446 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6447 rpc_restart_call_prepare(task);
6450 dprintk("<-- %s\n", __func__);
6453 static void nfs4_layoutreturn_release(void *calldata)
6455 struct nfs4_layoutreturn *lrp = calldata;
6456 struct pnfs_layout_hdr *lo = lrp->args.layout;
6458 dprintk("--> %s\n", __func__);
6459 spin_lock(&lo->plh_inode->i_lock);
6460 if (lrp->res.lrs_present)
6461 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6462 lo->plh_block_lgets--;
6463 spin_unlock(&lo->plh_inode->i_lock);
6464 pnfs_put_layout_hdr(lrp->args.layout);
6466 dprintk("<-- %s\n", __func__);
6469 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6470 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6471 .rpc_call_done = nfs4_layoutreturn_done,
6472 .rpc_release = nfs4_layoutreturn_release,
6475 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6477 struct rpc_task *task;
6478 struct rpc_message msg = {
6479 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6480 .rpc_argp = &lrp->args,
6481 .rpc_resp = &lrp->res,
6483 struct rpc_task_setup task_setup_data = {
6484 .rpc_client = lrp->clp->cl_rpcclient,
6485 .rpc_message = &msg,
6486 .callback_ops = &nfs4_layoutreturn_call_ops,
6487 .callback_data = lrp,
6491 dprintk("--> %s\n", __func__);
6492 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
6493 task = rpc_run_task(&task_setup_data);
6495 return PTR_ERR(task);
6496 status = task->tk_status;
6497 dprintk("<-- %s status=%d\n", __func__, status);
6503 * Retrieve the list of Data Server devices from the MDS.
6505 static int _nfs4_getdevicelist(struct nfs_server *server,
6506 const struct nfs_fh *fh,
6507 struct pnfs_devicelist *devlist)
6509 struct nfs4_getdevicelist_args args = {
6511 .layoutclass = server->pnfs_curr_ld->id,
6513 struct nfs4_getdevicelist_res res = {
6516 struct rpc_message msg = {
6517 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6523 dprintk("--> %s\n", __func__);
6524 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6526 dprintk("<-- %s status=%d\n", __func__, status);
6530 int nfs4_proc_getdevicelist(struct nfs_server *server,
6531 const struct nfs_fh *fh,
6532 struct pnfs_devicelist *devlist)
6534 struct nfs4_exception exception = { };
6538 err = nfs4_handle_exception(server,
6539 _nfs4_getdevicelist(server, fh, devlist),
6541 } while (exception.retry);
6543 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6544 err, devlist->num_devs);
6548 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6551 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6553 struct nfs4_getdeviceinfo_args args = {
6556 struct nfs4_getdeviceinfo_res res = {
6559 struct rpc_message msg = {
6560 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6566 dprintk("--> %s\n", __func__);
6567 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6568 dprintk("<-- %s status=%d\n", __func__, status);
6573 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6575 struct nfs4_exception exception = { };
6579 err = nfs4_handle_exception(server,
6580 _nfs4_proc_getdeviceinfo(server, pdev),
6582 } while (exception.retry);
6585 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6587 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6589 struct nfs4_layoutcommit_data *data = calldata;
6590 struct nfs_server *server = NFS_SERVER(data->args.inode);
6591 struct nfs4_session *session = nfs4_get_session(server);
6593 nfs41_setup_sequence(session,
6594 &data->args.seq_args,
6600 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6602 struct nfs4_layoutcommit_data *data = calldata;
6603 struct nfs_server *server = NFS_SERVER(data->args.inode);
6605 if (!nfs41_sequence_done(task, &data->res.seq_res))
6608 switch (task->tk_status) { /* Just ignore these failures */
6609 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6610 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6611 case -NFS4ERR_BADLAYOUT: /* no layout */
6612 case -NFS4ERR_GRACE: /* loca_recalim always false */
6613 task->tk_status = 0;
6616 nfs_post_op_update_inode_force_wcc(data->args.inode,
6620 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6621 rpc_restart_call_prepare(task);
6627 static void nfs4_layoutcommit_release(void *calldata)
6629 struct nfs4_layoutcommit_data *data = calldata;
6631 pnfs_cleanup_layoutcommit(data);
6632 put_rpccred(data->cred);
6636 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6637 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6638 .rpc_call_done = nfs4_layoutcommit_done,
6639 .rpc_release = nfs4_layoutcommit_release,
6643 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
6645 struct rpc_message msg = {
6646 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6647 .rpc_argp = &data->args,
6648 .rpc_resp = &data->res,
6649 .rpc_cred = data->cred,
6651 struct rpc_task_setup task_setup_data = {
6652 .task = &data->task,
6653 .rpc_client = NFS_CLIENT(data->args.inode),
6654 .rpc_message = &msg,
6655 .callback_ops = &nfs4_layoutcommit_ops,
6656 .callback_data = data,
6657 .flags = RPC_TASK_ASYNC,
6659 struct rpc_task *task;
6662 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6663 "lbw: %llu inode %lu\n",
6664 data->task.tk_pid, sync,
6665 data->args.lastbytewritten,
6666 data->args.inode->i_ino);
6668 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
6669 task = rpc_run_task(&task_setup_data);
6671 return PTR_ERR(task);
6674 status = nfs4_wait_for_completion_rpc_task(task);
6677 status = task->tk_status;
6679 dprintk("%s: status %d\n", __func__, status);
6685 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6686 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6688 struct nfs41_secinfo_no_name_args args = {
6689 .style = SECINFO_STYLE_CURRENT_FH,
6691 struct nfs4_secinfo_res res = {
6694 struct rpc_message msg = {
6695 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6699 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6703 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6704 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6706 struct nfs4_exception exception = { };
6709 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6712 case -NFS4ERR_WRONGSEC:
6716 err = nfs4_handle_exception(server, err, &exception);
6718 } while (exception.retry);
6724 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6725 struct nfs_fsinfo *info)
6729 rpc_authflavor_t flavor;
6730 struct nfs4_secinfo_flavors *flavors;
6732 page = alloc_page(GFP_KERNEL);
6738 flavors = page_address(page);
6739 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6742 * Fall back on "guess and check" method if
6743 * the server doesn't support SECINFO_NO_NAME
6745 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
6746 err = nfs4_find_root_sec(server, fhandle, info);
6752 flavor = nfs_find_best_sec(flavors);
6754 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6764 static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6767 struct nfs41_test_stateid_args args = {
6770 struct nfs41_test_stateid_res res;
6771 struct rpc_message msg = {
6772 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6777 dprintk("NFS call test_stateid %p\n", stateid);
6778 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6779 nfs4_set_sequence_privileged(&args.seq_args);
6780 status = nfs4_call_sync_sequence(server->client, server, &msg,
6781 &args.seq_args, &res.seq_res);
6782 if (status != NFS_OK) {
6783 dprintk("NFS reply test_stateid: failed, %d\n", status);
6786 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
6791 * nfs41_test_stateid - perform a TEST_STATEID operation
6793 * @server: server / transport on which to perform the operation
6794 * @stateid: state ID to test
6796 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6797 * Otherwise a negative NFS4ERR value is returned if the operation
6798 * failed or the state ID is not currently valid.
6800 static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6802 struct nfs4_exception exception = { };
6805 err = _nfs41_test_stateid(server, stateid);
6806 if (err != -NFS4ERR_DELAY)
6808 nfs4_handle_exception(server, err, &exception);
6809 } while (exception.retry);
6813 struct nfs_free_stateid_data {
6814 struct nfs_server *server;
6815 struct nfs41_free_stateid_args args;
6816 struct nfs41_free_stateid_res res;
6819 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
6821 struct nfs_free_stateid_data *data = calldata;
6822 nfs41_setup_sequence(nfs4_get_session(data->server),
6823 &data->args.seq_args,
6828 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
6830 struct nfs_free_stateid_data *data = calldata;
6832 nfs41_sequence_done(task, &data->res.seq_res);
6834 switch (task->tk_status) {
6835 case -NFS4ERR_DELAY:
6836 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
6837 rpc_restart_call_prepare(task);
6841 static void nfs41_free_stateid_release(void *calldata)
6846 const struct rpc_call_ops nfs41_free_stateid_ops = {
6847 .rpc_call_prepare = nfs41_free_stateid_prepare,
6848 .rpc_call_done = nfs41_free_stateid_done,
6849 .rpc_release = nfs41_free_stateid_release,
6852 static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
6853 nfs4_stateid *stateid,
6856 struct rpc_message msg = {
6857 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6859 struct rpc_task_setup task_setup = {
6860 .rpc_client = server->client,
6861 .rpc_message = &msg,
6862 .callback_ops = &nfs41_free_stateid_ops,
6863 .flags = RPC_TASK_ASYNC,
6865 struct nfs_free_stateid_data *data;
6867 dprintk("NFS call free_stateid %p\n", stateid);
6868 data = kmalloc(sizeof(*data), GFP_NOFS);
6870 return ERR_PTR(-ENOMEM);
6871 data->server = server;
6872 nfs4_stateid_copy(&data->args.stateid, stateid);
6874 task_setup.callback_data = data;
6876 msg.rpc_argp = &data->args;
6877 msg.rpc_resp = &data->res;
6878 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
6880 nfs4_set_sequence_privileged(&data->args.seq_args);
6882 return rpc_run_task(&task_setup);
6886 * nfs41_free_stateid - perform a FREE_STATEID operation
6888 * @server: server / transport on which to perform the operation
6889 * @stateid: state ID to release
6891 * Returns NFS_OK if the server freed "stateid". Otherwise a
6892 * negative NFS4ERR value is returned.
6894 static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6896 struct rpc_task *task;
6899 task = _nfs41_free_stateid(server, stateid, true);
6901 return PTR_ERR(task);
6902 ret = rpc_wait_for_completion_task(task);
6904 ret = task->tk_status;
6909 static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
6911 struct rpc_task *task;
6913 task = _nfs41_free_stateid(server, &lsp->ls_stateid, false);
6914 nfs4_free_lock_state(server, lsp);
6916 return PTR_ERR(task);
6921 static bool nfs41_match_stateid(const nfs4_stateid *s1,
6922 const nfs4_stateid *s2)
6924 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
6927 if (s1->seqid == s2->seqid)
6929 if (s1->seqid == 0 || s2->seqid == 0)
6935 #endif /* CONFIG_NFS_V4_1 */
6937 static bool nfs4_match_stateid(const nfs4_stateid *s1,
6938 const nfs4_stateid *s2)
6940 return nfs4_stateid_match(s1, s2);
6944 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
6945 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6946 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6947 .recover_open = nfs4_open_reclaim,
6948 .recover_lock = nfs4_lock_reclaim,
6949 .establish_clid = nfs4_init_clientid,
6950 .get_clid_cred = nfs4_get_setclientid_cred,
6951 .detect_trunking = nfs40_discover_server_trunking,
6954 #if defined(CONFIG_NFS_V4_1)
6955 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6956 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6957 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6958 .recover_open = nfs4_open_reclaim,
6959 .recover_lock = nfs4_lock_reclaim,
6960 .establish_clid = nfs41_init_clientid,
6961 .get_clid_cred = nfs4_get_exchange_id_cred,
6962 .reclaim_complete = nfs41_proc_reclaim_complete,
6963 .detect_trunking = nfs41_discover_server_trunking,
6965 #endif /* CONFIG_NFS_V4_1 */
6967 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6968 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6969 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6970 .recover_open = nfs4_open_expired,
6971 .recover_lock = nfs4_lock_expired,
6972 .establish_clid = nfs4_init_clientid,
6973 .get_clid_cred = nfs4_get_setclientid_cred,
6976 #if defined(CONFIG_NFS_V4_1)
6977 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
6978 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6979 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6980 .recover_open = nfs41_open_expired,
6981 .recover_lock = nfs41_lock_expired,
6982 .establish_clid = nfs41_init_clientid,
6983 .get_clid_cred = nfs4_get_exchange_id_cred,
6985 #endif /* CONFIG_NFS_V4_1 */
6987 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
6988 .sched_state_renewal = nfs4_proc_async_renew,
6989 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
6990 .renew_lease = nfs4_proc_renew,
6993 #if defined(CONFIG_NFS_V4_1)
6994 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
6995 .sched_state_renewal = nfs41_proc_async_sequence,
6996 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
6997 .renew_lease = nfs4_proc_sequence,
7001 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
7003 .init_caps = NFS_CAP_READDIRPLUS
7004 | NFS_CAP_ATOMIC_OPEN
7005 | NFS_CAP_CHANGE_ATTR
7006 | NFS_CAP_POSIX_LOCK,
7007 .call_sync = _nfs4_call_sync,
7008 .match_stateid = nfs4_match_stateid,
7009 .find_root_sec = nfs4_find_root_sec,
7010 .free_lock_state = nfs4_release_lockowner,
7011 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
7012 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
7013 .state_renewal_ops = &nfs40_state_renewal_ops,
7016 #if defined(CONFIG_NFS_V4_1)
7017 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
7019 .init_caps = NFS_CAP_READDIRPLUS
7020 | NFS_CAP_ATOMIC_OPEN
7021 | NFS_CAP_CHANGE_ATTR
7022 | NFS_CAP_POSIX_LOCK
7023 | NFS_CAP_STATEID_NFSV41
7024 | NFS_CAP_ATOMIC_OPEN_V1,
7025 .call_sync = nfs4_call_sync_sequence,
7026 .match_stateid = nfs41_match_stateid,
7027 .find_root_sec = nfs41_find_root_sec,
7028 .free_lock_state = nfs41_free_lock_state,
7029 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7030 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7031 .state_renewal_ops = &nfs41_state_renewal_ops,
7035 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
7036 [0] = &nfs_v4_0_minor_ops,
7037 #if defined(CONFIG_NFS_V4_1)
7038 [1] = &nfs_v4_1_minor_ops,
7042 const struct inode_operations nfs4_dir_inode_operations = {
7043 .create = nfs_create,
7044 .lookup = nfs_lookup,
7045 .atomic_open = nfs_atomic_open,
7047 .unlink = nfs_unlink,
7048 .symlink = nfs_symlink,
7052 .rename = nfs_rename,
7053 .permission = nfs_permission,
7054 .getattr = nfs_getattr,
7055 .setattr = nfs_setattr,
7056 .getxattr = generic_getxattr,
7057 .setxattr = generic_setxattr,
7058 .listxattr = generic_listxattr,
7059 .removexattr = generic_removexattr,
7062 static const struct inode_operations nfs4_file_inode_operations = {
7063 .permission = nfs_permission,
7064 .getattr = nfs_getattr,
7065 .setattr = nfs_setattr,
7066 .getxattr = generic_getxattr,
7067 .setxattr = generic_setxattr,
7068 .listxattr = generic_listxattr,
7069 .removexattr = generic_removexattr,
7072 const struct nfs_rpc_ops nfs_v4_clientops = {
7073 .version = 4, /* protocol version */
7074 .dentry_ops = &nfs4_dentry_operations,
7075 .dir_inode_ops = &nfs4_dir_inode_operations,
7076 .file_inode_ops = &nfs4_file_inode_operations,
7077 .file_ops = &nfs4_file_operations,
7078 .getroot = nfs4_proc_get_root,
7079 .submount = nfs4_submount,
7080 .try_mount = nfs4_try_mount,
7081 .getattr = nfs4_proc_getattr,
7082 .setattr = nfs4_proc_setattr,
7083 .lookup = nfs4_proc_lookup,
7084 .access = nfs4_proc_access,
7085 .readlink = nfs4_proc_readlink,
7086 .create = nfs4_proc_create,
7087 .remove = nfs4_proc_remove,
7088 .unlink_setup = nfs4_proc_unlink_setup,
7089 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
7090 .unlink_done = nfs4_proc_unlink_done,
7091 .rename = nfs4_proc_rename,
7092 .rename_setup = nfs4_proc_rename_setup,
7093 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
7094 .rename_done = nfs4_proc_rename_done,
7095 .link = nfs4_proc_link,
7096 .symlink = nfs4_proc_symlink,
7097 .mkdir = nfs4_proc_mkdir,
7098 .rmdir = nfs4_proc_remove,
7099 .readdir = nfs4_proc_readdir,
7100 .mknod = nfs4_proc_mknod,
7101 .statfs = nfs4_proc_statfs,
7102 .fsinfo = nfs4_proc_fsinfo,
7103 .pathconf = nfs4_proc_pathconf,
7104 .set_capabilities = nfs4_server_capabilities,
7105 .decode_dirent = nfs4_decode_dirent,
7106 .read_setup = nfs4_proc_read_setup,
7107 .read_pageio_init = pnfs_pageio_init_read,
7108 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
7109 .read_done = nfs4_read_done,
7110 .write_setup = nfs4_proc_write_setup,
7111 .write_pageio_init = pnfs_pageio_init_write,
7112 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
7113 .write_done = nfs4_write_done,
7114 .commit_setup = nfs4_proc_commit_setup,
7115 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
7116 .commit_done = nfs4_commit_done,
7117 .lock = nfs4_proc_lock,
7118 .clear_acl_cache = nfs4_zap_acl_attr,
7119 .close_context = nfs4_close_context,
7120 .open_context = nfs4_atomic_open,
7121 .have_delegation = nfs4_have_delegation,
7122 .return_delegation = nfs4_inode_return_delegation,
7123 .alloc_client = nfs4_alloc_client,
7124 .init_client = nfs4_init_client,
7125 .free_client = nfs4_free_client,
7126 .create_server = nfs4_create_server,
7127 .clone_server = nfs_clone_server,
7130 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7131 .prefix = XATTR_NAME_NFSV4_ACL,
7132 .list = nfs4_xattr_list_nfs4_acl,
7133 .get = nfs4_xattr_get_nfs4_acl,
7134 .set = nfs4_xattr_set_nfs4_acl,
7137 const struct xattr_handler *nfs4_xattr_handlers[] = {
7138 &nfs4_xattr_nfs4_acl_handler,