4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #include <linux/delay.h>
40 #include <linux/errno.h>
41 #include <linux/string.h>
42 #include <linux/ratelimit.h>
43 #include <linux/printk.h>
44 #include <linux/slab.h>
45 #include <linux/sunrpc/clnt.h>
46 #include <linux/nfs.h>
47 #include <linux/nfs4.h>
48 #include <linux/nfs_fs.h>
49 #include <linux/nfs_page.h>
50 #include <linux/nfs_mount.h>
51 #include <linux/namei.h>
52 #include <linux/mount.h>
53 #include <linux/module.h>
54 #include <linux/nfs_idmap.h>
55 #include <linux/xattr.h>
56 #include <linux/utsname.h>
57 #include <linux/freezer.h>
60 #include "delegation.h"
66 #include "nfs4session.h"
69 #define NFSDBG_FACILITY NFSDBG_PROC
71 #define NFS4_POLL_RETRY_MIN (HZ/10)
72 #define NFS4_POLL_RETRY_MAX (15*HZ)
75 static int _nfs4_proc_open(struct nfs4_opendata *data);
76 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
77 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
78 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
79 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
80 static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *);
81 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
82 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
83 struct nfs_fattr *fattr, struct iattr *sattr,
84 struct nfs4_state *state);
85 #ifdef CONFIG_NFS_V4_1
86 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
87 static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
89 /* Prevent leaks of NFSv4 errors into userland */
90 static int nfs4_map_errors(int err)
95 case -NFS4ERR_RESOURCE:
96 case -NFS4ERR_LAYOUTTRYLATER:
97 case -NFS4ERR_RECALLCONFLICT:
99 case -NFS4ERR_WRONGSEC:
101 case -NFS4ERR_BADOWNER:
102 case -NFS4ERR_BADNAME:
104 case -NFS4ERR_SHARE_DENIED:
106 case -NFS4ERR_MINOR_VERS_MISMATCH:
107 return -EPROTONOSUPPORT;
108 case -NFS4ERR_ACCESS:
110 case -NFS4ERR_FILE_OPEN:
113 dprintk("%s could not handle NFSv4 error %d\n",
121 * This is our standard bitmap for GETATTR requests.
123 const u32 nfs4_fattr_bitmap[3] = {
125 | FATTR4_WORD0_CHANGE
128 | FATTR4_WORD0_FILEID,
130 | FATTR4_WORD1_NUMLINKS
132 | FATTR4_WORD1_OWNER_GROUP
133 | FATTR4_WORD1_RAWDEV
134 | FATTR4_WORD1_SPACE_USED
135 | FATTR4_WORD1_TIME_ACCESS
136 | FATTR4_WORD1_TIME_METADATA
137 | FATTR4_WORD1_TIME_MODIFY
140 static const u32 nfs4_pnfs_open_bitmap[3] = {
142 | FATTR4_WORD0_CHANGE
145 | FATTR4_WORD0_FILEID,
147 | FATTR4_WORD1_NUMLINKS
149 | FATTR4_WORD1_OWNER_GROUP
150 | FATTR4_WORD1_RAWDEV
151 | FATTR4_WORD1_SPACE_USED
152 | FATTR4_WORD1_TIME_ACCESS
153 | FATTR4_WORD1_TIME_METADATA
154 | FATTR4_WORD1_TIME_MODIFY,
155 FATTR4_WORD2_MDSTHRESHOLD
158 static const u32 nfs4_open_noattr_bitmap[3] = {
160 | FATTR4_WORD0_CHANGE
161 | FATTR4_WORD0_FILEID,
164 const u32 nfs4_statfs_bitmap[2] = {
165 FATTR4_WORD0_FILES_AVAIL
166 | FATTR4_WORD0_FILES_FREE
167 | FATTR4_WORD0_FILES_TOTAL,
168 FATTR4_WORD1_SPACE_AVAIL
169 | FATTR4_WORD1_SPACE_FREE
170 | FATTR4_WORD1_SPACE_TOTAL
173 const u32 nfs4_pathconf_bitmap[2] = {
175 | FATTR4_WORD0_MAXNAME,
179 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
180 | FATTR4_WORD0_MAXREAD
181 | FATTR4_WORD0_MAXWRITE
182 | FATTR4_WORD0_LEASE_TIME,
183 FATTR4_WORD1_TIME_DELTA
184 | FATTR4_WORD1_FS_LAYOUT_TYPES,
185 FATTR4_WORD2_LAYOUT_BLKSIZE
188 const u32 nfs4_fs_locations_bitmap[2] = {
190 | FATTR4_WORD0_CHANGE
193 | FATTR4_WORD0_FILEID
194 | FATTR4_WORD0_FS_LOCATIONS,
196 | FATTR4_WORD1_NUMLINKS
198 | FATTR4_WORD1_OWNER_GROUP
199 | FATTR4_WORD1_RAWDEV
200 | FATTR4_WORD1_SPACE_USED
201 | FATTR4_WORD1_TIME_ACCESS
202 | FATTR4_WORD1_TIME_METADATA
203 | FATTR4_WORD1_TIME_MODIFY
204 | FATTR4_WORD1_MOUNTED_ON_FILEID
207 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
208 struct nfs4_readdir_arg *readdir)
213 readdir->cookie = cookie;
214 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
219 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
224 * NFSv4 servers do not return entries for '.' and '..'
225 * Therefore, we fake these entries here. We let '.'
226 * have cookie 0 and '..' have cookie 1. Note that
227 * when talking to the server, we always send cookie 0
230 start = p = kmap_atomic(*readdir->pages);
233 *p++ = xdr_one; /* next */
234 *p++ = xdr_zero; /* cookie, first word */
235 *p++ = xdr_one; /* cookie, second word */
236 *p++ = xdr_one; /* entry len */
237 memcpy(p, ".\0\0\0", 4); /* entry */
239 *p++ = xdr_one; /* bitmap length */
240 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
241 *p++ = htonl(8); /* attribute buffer length */
242 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
245 *p++ = xdr_one; /* next */
246 *p++ = xdr_zero; /* cookie, first word */
247 *p++ = xdr_two; /* cookie, second word */
248 *p++ = xdr_two; /* entry len */
249 memcpy(p, "..\0\0", 4); /* entry */
251 *p++ = xdr_one; /* bitmap length */
252 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
253 *p++ = htonl(8); /* attribute buffer length */
254 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
256 readdir->pgbase = (char *)p - (char *)start;
257 readdir->count -= readdir->pgbase;
258 kunmap_atomic(start);
261 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
268 *timeout = NFS4_POLL_RETRY_MIN;
269 if (*timeout > NFS4_POLL_RETRY_MAX)
270 *timeout = NFS4_POLL_RETRY_MAX;
271 freezable_schedule_timeout_killable(*timeout);
272 if (fatal_signal_pending(current))
278 /* This is the error handling routine for processes that are allowed
281 static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
283 struct nfs_client *clp = server->nfs_client;
284 struct nfs4_state *state = exception->state;
285 struct inode *inode = exception->inode;
288 exception->retry = 0;
292 case -NFS4ERR_OPENMODE:
293 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
294 nfs4_inode_return_delegation(inode);
295 exception->retry = 1;
300 ret = nfs4_schedule_stateid_recovery(server, state);
303 goto wait_on_recovery;
304 case -NFS4ERR_DELEG_REVOKED:
305 case -NFS4ERR_ADMIN_REVOKED:
306 case -NFS4ERR_BAD_STATEID:
307 if (inode != NULL && nfs4_have_delegation(inode, FMODE_READ)) {
308 nfs_remove_bad_delegation(inode);
309 exception->retry = 1;
314 ret = nfs4_schedule_stateid_recovery(server, state);
317 goto wait_on_recovery;
318 case -NFS4ERR_EXPIRED:
320 ret = nfs4_schedule_stateid_recovery(server, state);
324 case -NFS4ERR_STALE_STATEID:
325 case -NFS4ERR_STALE_CLIENTID:
326 nfs4_schedule_lease_recovery(clp);
327 goto wait_on_recovery;
328 #if defined(CONFIG_NFS_V4_1)
329 case -NFS4ERR_BADSESSION:
330 case -NFS4ERR_BADSLOT:
331 case -NFS4ERR_BAD_HIGH_SLOT:
332 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
333 case -NFS4ERR_DEADSESSION:
334 case -NFS4ERR_SEQ_FALSE_RETRY:
335 case -NFS4ERR_SEQ_MISORDERED:
336 dprintk("%s ERROR: %d Reset session\n", __func__,
338 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
339 goto wait_on_recovery;
340 #endif /* defined(CONFIG_NFS_V4_1) */
341 case -NFS4ERR_FILE_OPEN:
342 if (exception->timeout > HZ) {
343 /* We have retried a decent amount, time to
351 ret = nfs4_delay(server->client, &exception->timeout);
354 case -NFS4ERR_RETRY_UNCACHED_REP:
355 case -NFS4ERR_OLD_STATEID:
356 exception->retry = 1;
358 case -NFS4ERR_BADOWNER:
359 /* The following works around a Linux server bug! */
360 case -NFS4ERR_BADNAME:
361 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
362 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
363 exception->retry = 1;
364 printk(KERN_WARNING "NFS: v4 server %s "
365 "does not accept raw "
367 "Reenabling the idmapper.\n",
368 server->nfs_client->cl_hostname);
371 /* We failed to handle the error */
372 return nfs4_map_errors(ret);
374 ret = nfs4_wait_clnt_recover(clp);
376 exception->retry = 1;
381 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
383 spin_lock(&clp->cl_lock);
384 if (time_before(clp->cl_last_renewal,timestamp))
385 clp->cl_last_renewal = timestamp;
386 spin_unlock(&clp->cl_lock);
389 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
391 do_renew_lease(server->nfs_client, timestamp);
394 #if defined(CONFIG_NFS_V4_1)
396 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
398 struct nfs4_session *session;
399 struct nfs4_slot_table *tbl;
400 bool send_new_highest_used_slotid = false;
403 /* just wake up the next guy waiting since
404 * we may have not consumed a slot after all */
405 dprintk("%s: No slot\n", __func__);
408 tbl = res->sr_slot->table;
409 session = tbl->session;
411 spin_lock(&tbl->slot_tbl_lock);
412 /* Be nice to the server: try to ensure that the last transmitted
413 * value for highest_user_slotid <= target_highest_slotid
415 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
416 send_new_highest_used_slotid = true;
418 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
419 send_new_highest_used_slotid = false;
422 nfs4_free_slot(tbl, res->sr_slot);
424 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
425 send_new_highest_used_slotid = false;
427 spin_unlock(&tbl->slot_tbl_lock);
429 if (send_new_highest_used_slotid)
430 nfs41_server_notify_highest_slotid_update(session->clp);
433 static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
435 struct nfs4_session *session;
436 struct nfs4_slot *slot;
437 struct nfs_client *clp;
438 bool interrupted = false;
441 /* don't increment the sequence number if the task wasn't sent */
442 if (!RPC_WAS_SENT(task))
446 session = slot->table->session;
448 if (slot->interrupted) {
449 slot->interrupted = 0;
453 /* Check the SEQUENCE operation status */
454 switch (res->sr_status) {
456 /* Update the slot's sequence and clientid lease timer */
459 do_renew_lease(clp, res->sr_timestamp);
460 /* Check sequence flags */
461 if (res->sr_status_flags != 0)
462 nfs4_schedule_lease_recovery(clp);
463 nfs41_update_target_slotid(slot->table, slot, res);
467 * sr_status remains 1 if an RPC level error occurred.
468 * The server may or may not have processed the sequence
470 * Mark the slot as having hosted an interrupted RPC call.
472 slot->interrupted = 1;
475 /* The server detected a resend of the RPC call and
476 * returned NFS4ERR_DELAY as per Section 2.10.6.2
479 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
484 case -NFS4ERR_BADSLOT:
486 * The slot id we used was probably retired. Try again
487 * using a different slot id.
490 case -NFS4ERR_SEQ_MISORDERED:
492 * Was the last operation on this sequence interrupted?
493 * If so, retry after bumping the sequence number.
500 * Could this slot have been previously retired?
501 * If so, then the server may be expecting seq_nr = 1!
503 if (slot->seq_nr != 1) {
508 case -NFS4ERR_SEQ_FALSE_RETRY:
512 /* Just update the slot sequence no. */
516 /* The session may be reset by one of the error handlers. */
517 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
518 nfs41_sequence_free_slot(res);
521 if (rpc_restart_call_prepare(task)) {
527 if (!rpc_restart_call(task))
529 rpc_delay(task, NFS4_POLL_RETRY_MAX);
533 static int nfs4_sequence_done(struct rpc_task *task,
534 struct nfs4_sequence_res *res)
536 if (res->sr_slot == NULL)
538 return nfs41_sequence_done(task, res);
541 static void nfs41_init_sequence(struct nfs4_sequence_args *args,
542 struct nfs4_sequence_res *res, int cache_reply)
544 args->sa_slot = NULL;
545 args->sa_cache_this = 0;
546 args->sa_privileged = 0;
548 args->sa_cache_this = 1;
552 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
554 args->sa_privileged = 1;
557 int nfs41_setup_sequence(struct nfs4_session *session,
558 struct nfs4_sequence_args *args,
559 struct nfs4_sequence_res *res,
560 struct rpc_task *task)
562 struct nfs4_slot *slot;
563 struct nfs4_slot_table *tbl;
565 dprintk("--> %s\n", __func__);
566 /* slot already allocated? */
567 if (res->sr_slot != NULL)
570 tbl = &session->fc_slot_table;
572 task->tk_timeout = 0;
574 spin_lock(&tbl->slot_tbl_lock);
575 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
576 !args->sa_privileged) {
577 /* The state manager will wait until the slot table is empty */
578 dprintk("%s session is draining\n", __func__);
582 slot = nfs4_alloc_slot(tbl);
584 /* If out of memory, try again in 1/4 second */
585 if (slot == ERR_PTR(-ENOMEM))
586 task->tk_timeout = HZ >> 2;
587 dprintk("<-- %s: no free slots\n", __func__);
590 spin_unlock(&tbl->slot_tbl_lock);
592 args->sa_slot = slot;
594 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
595 slot->slot_nr, slot->seq_nr);
598 res->sr_timestamp = jiffies;
599 res->sr_status_flags = 0;
601 * sr_status is only set in decode_sequence, and so will remain
602 * set to 1 if an rpc level failure occurs.
606 rpc_call_start(task);
609 /* Privileged tasks are queued with top priority */
610 if (args->sa_privileged)
611 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
612 NULL, RPC_PRIORITY_PRIVILEGED);
614 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
615 spin_unlock(&tbl->slot_tbl_lock);
618 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
620 int nfs4_setup_sequence(const struct nfs_server *server,
621 struct nfs4_sequence_args *args,
622 struct nfs4_sequence_res *res,
623 struct rpc_task *task)
625 struct nfs4_session *session = nfs4_get_session(server);
628 if (session == NULL) {
629 rpc_call_start(task);
633 dprintk("--> %s clp %p session %p sr_slot %d\n",
634 __func__, session->clp, session, res->sr_slot ?
635 res->sr_slot->slot_nr : -1);
637 ret = nfs41_setup_sequence(session, args, res, task);
639 dprintk("<-- %s status=%d\n", __func__, ret);
643 struct nfs41_call_sync_data {
644 const struct nfs_server *seq_server;
645 struct nfs4_sequence_args *seq_args;
646 struct nfs4_sequence_res *seq_res;
649 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
651 struct nfs41_call_sync_data *data = calldata;
652 struct nfs4_session *session = nfs4_get_session(data->seq_server);
654 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
656 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
659 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
661 struct nfs41_call_sync_data *data = calldata;
663 nfs41_sequence_done(task, data->seq_res);
666 static const struct rpc_call_ops nfs41_call_sync_ops = {
667 .rpc_call_prepare = nfs41_call_sync_prepare,
668 .rpc_call_done = nfs41_call_sync_done,
671 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
672 struct nfs_server *server,
673 struct rpc_message *msg,
674 struct nfs4_sequence_args *args,
675 struct nfs4_sequence_res *res)
678 struct rpc_task *task;
679 struct nfs41_call_sync_data data = {
680 .seq_server = server,
684 struct rpc_task_setup task_setup = {
687 .callback_ops = &nfs41_call_sync_ops,
688 .callback_data = &data
691 task = rpc_run_task(&task_setup);
695 ret = task->tk_status;
703 void nfs41_init_sequence(struct nfs4_sequence_args *args,
704 struct nfs4_sequence_res *res, int cache_reply)
708 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
713 static int nfs4_sequence_done(struct rpc_task *task,
714 struct nfs4_sequence_res *res)
718 #endif /* CONFIG_NFS_V4_1 */
721 int _nfs4_call_sync(struct rpc_clnt *clnt,
722 struct nfs_server *server,
723 struct rpc_message *msg,
724 struct nfs4_sequence_args *args,
725 struct nfs4_sequence_res *res)
727 return rpc_call_sync(clnt, msg, 0);
731 int nfs4_call_sync(struct rpc_clnt *clnt,
732 struct nfs_server *server,
733 struct rpc_message *msg,
734 struct nfs4_sequence_args *args,
735 struct nfs4_sequence_res *res,
738 nfs41_init_sequence(args, res, cache_reply);
739 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
743 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
745 struct nfs_inode *nfsi = NFS_I(dir);
747 spin_lock(&dir->i_lock);
748 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
749 if (!cinfo->atomic || cinfo->before != dir->i_version)
750 nfs_force_lookup_revalidate(dir);
751 dir->i_version = cinfo->after;
752 nfs_fscache_invalidate(dir);
753 spin_unlock(&dir->i_lock);
756 struct nfs4_opendata {
758 struct nfs_openargs o_arg;
759 struct nfs_openres o_res;
760 struct nfs_open_confirmargs c_arg;
761 struct nfs_open_confirmres c_res;
762 struct nfs4_string owner_name;
763 struct nfs4_string group_name;
764 struct nfs_fattr f_attr;
766 struct dentry *dentry;
767 struct nfs4_state_owner *owner;
768 struct nfs4_state *state;
770 unsigned long timestamp;
771 unsigned int rpc_done : 1;
772 unsigned int is_recover : 1;
777 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
778 int err, struct nfs4_exception *exception)
782 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
784 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
785 exception->retry = 1;
789 static enum open_claim_type4
790 nfs4_map_atomic_open_claim(struct nfs_server *server,
791 enum open_claim_type4 claim)
793 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
798 case NFS4_OPEN_CLAIM_FH:
799 return NFS4_OPEN_CLAIM_NULL;
800 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
801 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
802 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
803 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
807 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
809 p->o_res.f_attr = &p->f_attr;
810 p->o_res.seqid = p->o_arg.seqid;
811 p->c_res.seqid = p->c_arg.seqid;
812 p->o_res.server = p->o_arg.server;
813 p->o_res.access_request = p->o_arg.access;
814 nfs_fattr_init(&p->f_attr);
815 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
818 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
819 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
820 const struct iattr *attrs,
821 enum open_claim_type4 claim,
824 struct dentry *parent = dget_parent(dentry);
825 struct inode *dir = parent->d_inode;
826 struct nfs_server *server = NFS_SERVER(dir);
827 struct nfs4_opendata *p;
829 p = kzalloc(sizeof(*p), gfp_mask);
832 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
833 if (p->o_arg.seqid == NULL)
835 nfs_sb_active(dentry->d_sb);
836 p->dentry = dget(dentry);
839 atomic_inc(&sp->so_count);
840 p->o_arg.open_flags = flags;
841 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
842 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
843 * will return permission denied for all bits until close */
844 if (!(flags & O_EXCL)) {
845 /* ask server to check for all possible rights as results
847 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
848 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
850 p->o_arg.clientid = server->nfs_client->cl_clientid;
851 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
852 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
853 p->o_arg.name = &dentry->d_name;
854 p->o_arg.server = server;
855 p->o_arg.bitmask = server->attr_bitmask;
856 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
857 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
858 switch (p->o_arg.claim) {
859 case NFS4_OPEN_CLAIM_NULL:
860 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
861 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
862 p->o_arg.fh = NFS_FH(dir);
864 case NFS4_OPEN_CLAIM_PREVIOUS:
865 case NFS4_OPEN_CLAIM_FH:
866 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
867 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
868 p->o_arg.fh = NFS_FH(dentry->d_inode);
870 if (attrs != NULL && attrs->ia_valid != 0) {
873 p->o_arg.u.attrs = &p->attrs;
874 memcpy(&p->attrs, attrs, sizeof(p->attrs));
877 verf[1] = current->pid;
878 memcpy(p->o_arg.u.verifier.data, verf,
879 sizeof(p->o_arg.u.verifier.data));
881 p->c_arg.fh = &p->o_res.fh;
882 p->c_arg.stateid = &p->o_res.stateid;
883 p->c_arg.seqid = p->o_arg.seqid;
884 nfs4_init_opendata_res(p);
894 static void nfs4_opendata_free(struct kref *kref)
896 struct nfs4_opendata *p = container_of(kref,
897 struct nfs4_opendata, kref);
898 struct super_block *sb = p->dentry->d_sb;
900 nfs_free_seqid(p->o_arg.seqid);
901 if (p->state != NULL)
902 nfs4_put_open_state(p->state);
903 nfs4_put_state_owner(p->owner);
907 nfs_fattr_free_names(&p->f_attr);
911 static void nfs4_opendata_put(struct nfs4_opendata *p)
914 kref_put(&p->kref, nfs4_opendata_free);
917 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
921 ret = rpc_wait_for_completion_task(task);
925 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
929 if (open_mode & (O_EXCL|O_TRUNC))
931 switch (mode & (FMODE_READ|FMODE_WRITE)) {
933 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
934 && state->n_rdonly != 0;
937 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
938 && state->n_wronly != 0;
940 case FMODE_READ|FMODE_WRITE:
941 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
942 && state->n_rdwr != 0;
948 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
950 if (delegation == NULL)
952 if ((delegation->type & fmode) != fmode)
954 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
956 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
958 nfs_mark_delegation_referenced(delegation);
962 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
971 case FMODE_READ|FMODE_WRITE:
974 nfs4_state_set_mode_locked(state, state->state | fmode);
977 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
979 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
980 nfs4_stateid_copy(&state->stateid, stateid);
981 nfs4_stateid_copy(&state->open_stateid, stateid);
982 set_bit(NFS_OPEN_STATE, &state->flags);
985 set_bit(NFS_O_RDONLY_STATE, &state->flags);
988 set_bit(NFS_O_WRONLY_STATE, &state->flags);
990 case FMODE_READ|FMODE_WRITE:
991 set_bit(NFS_O_RDWR_STATE, &state->flags);
995 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
997 write_seqlock(&state->seqlock);
998 nfs_set_open_stateid_locked(state, stateid, fmode);
999 write_sequnlock(&state->seqlock);
1002 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1005 * Protect the call to nfs4_state_set_mode_locked and
1006 * serialise the stateid update
1008 write_seqlock(&state->seqlock);
1009 if (deleg_stateid != NULL) {
1010 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1011 set_bit(NFS_DELEGATED_STATE, &state->flags);
1013 if (open_stateid != NULL)
1014 nfs_set_open_stateid_locked(state, open_stateid, fmode);
1015 write_sequnlock(&state->seqlock);
1016 spin_lock(&state->owner->so_lock);
1017 update_open_stateflags(state, fmode);
1018 spin_unlock(&state->owner->so_lock);
1021 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
1023 struct nfs_inode *nfsi = NFS_I(state->inode);
1024 struct nfs_delegation *deleg_cur;
1027 fmode &= (FMODE_READ|FMODE_WRITE);
1030 deleg_cur = rcu_dereference(nfsi->delegation);
1031 if (deleg_cur == NULL)
1034 spin_lock(&deleg_cur->lock);
1035 if (nfsi->delegation != deleg_cur ||
1036 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
1037 (deleg_cur->type & fmode) != fmode)
1038 goto no_delegation_unlock;
1040 if (delegation == NULL)
1041 delegation = &deleg_cur->stateid;
1042 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1043 goto no_delegation_unlock;
1045 nfs_mark_delegation_referenced(deleg_cur);
1046 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1048 no_delegation_unlock:
1049 spin_unlock(&deleg_cur->lock);
1053 if (!ret && open_stateid != NULL) {
1054 __update_open_stateid(state, open_stateid, NULL, fmode);
1062 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1064 struct nfs_delegation *delegation;
1067 delegation = rcu_dereference(NFS_I(inode)->delegation);
1068 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1073 nfs4_inode_return_delegation(inode);
1076 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1078 struct nfs4_state *state = opendata->state;
1079 struct nfs_inode *nfsi = NFS_I(state->inode);
1080 struct nfs_delegation *delegation;
1081 int open_mode = opendata->o_arg.open_flags;
1082 fmode_t fmode = opendata->o_arg.fmode;
1083 nfs4_stateid stateid;
1087 if (can_open_cached(state, fmode, open_mode)) {
1088 spin_lock(&state->owner->so_lock);
1089 if (can_open_cached(state, fmode, open_mode)) {
1090 update_open_stateflags(state, fmode);
1091 spin_unlock(&state->owner->so_lock);
1092 goto out_return_state;
1094 spin_unlock(&state->owner->so_lock);
1097 delegation = rcu_dereference(nfsi->delegation);
1098 if (!can_open_delegated(delegation, fmode)) {
1102 /* Save the delegation */
1103 nfs4_stateid_copy(&stateid, &delegation->stateid);
1105 nfs_release_seqid(opendata->o_arg.seqid);
1106 if (!opendata->is_recover) {
1107 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1113 /* Try to update the stateid using the delegation */
1114 if (update_open_stateid(state, NULL, &stateid, fmode))
1115 goto out_return_state;
1118 return ERR_PTR(ret);
1120 atomic_inc(&state->count);
1125 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1127 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1128 struct nfs_delegation *delegation;
1129 int delegation_flags = 0;
1132 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1134 delegation_flags = delegation->flags;
1136 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1137 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1138 "returning a delegation for "
1139 "OPEN(CLAIM_DELEGATE_CUR)\n",
1141 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1142 nfs_inode_set_delegation(state->inode,
1143 data->owner->so_cred,
1146 nfs_inode_reclaim_delegation(state->inode,
1147 data->owner->so_cred,
1152 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1153 * and update the nfs4_state.
1155 static struct nfs4_state *
1156 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1158 struct inode *inode = data->state->inode;
1159 struct nfs4_state *state = data->state;
1162 if (!data->rpc_done) {
1163 if (data->rpc_status) {
1164 ret = data->rpc_status;
1167 /* cached opens have already been processed */
1171 ret = nfs_refresh_inode(inode, &data->f_attr);
1175 if (data->o_res.delegation_type != 0)
1176 nfs4_opendata_check_deleg(data, state);
1178 update_open_stateid(state, &data->o_res.stateid, NULL,
1180 atomic_inc(&state->count);
1184 return ERR_PTR(ret);
1188 static struct nfs4_state *
1189 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1191 struct inode *inode;
1192 struct nfs4_state *state = NULL;
1195 if (!data->rpc_done) {
1196 state = nfs4_try_open_cached(data);
1201 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1203 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1204 ret = PTR_ERR(inode);
1208 state = nfs4_get_open_state(inode, data->owner);
1211 if (data->o_res.delegation_type != 0)
1212 nfs4_opendata_check_deleg(data, state);
1213 update_open_stateid(state, &data->o_res.stateid, NULL,
1217 nfs_release_seqid(data->o_arg.seqid);
1222 return ERR_PTR(ret);
1225 static struct nfs4_state *
1226 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1228 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1229 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1230 return _nfs4_opendata_to_nfs4_state(data);
1233 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1235 struct nfs_inode *nfsi = NFS_I(state->inode);
1236 struct nfs_open_context *ctx;
1238 spin_lock(&state->inode->i_lock);
1239 list_for_each_entry(ctx, &nfsi->open_files, list) {
1240 if (ctx->state != state)
1242 get_nfs_open_context(ctx);
1243 spin_unlock(&state->inode->i_lock);
1246 spin_unlock(&state->inode->i_lock);
1247 return ERR_PTR(-ENOENT);
1250 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1251 struct nfs4_state *state, enum open_claim_type4 claim)
1253 struct nfs4_opendata *opendata;
1255 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1256 NULL, claim, GFP_NOFS);
1257 if (opendata == NULL)
1258 return ERR_PTR(-ENOMEM);
1259 opendata->state = state;
1260 atomic_inc(&state->count);
1264 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1266 struct nfs4_state *newstate;
1269 opendata->o_arg.open_flags = 0;
1270 opendata->o_arg.fmode = fmode;
1271 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1272 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1273 nfs4_init_opendata_res(opendata);
1274 ret = _nfs4_recover_proc_open(opendata);
1277 newstate = nfs4_opendata_to_nfs4_state(opendata);
1278 if (IS_ERR(newstate))
1279 return PTR_ERR(newstate);
1280 nfs4_close_state(newstate, fmode);
1285 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1287 struct nfs4_state *newstate;
1290 /* memory barrier prior to reading state->n_* */
1291 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1292 clear_bit(NFS_OPEN_STATE, &state->flags);
1294 if (state->n_rdwr != 0) {
1295 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1296 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1299 if (newstate != state)
1302 if (state->n_wronly != 0) {
1303 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1304 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1307 if (newstate != state)
1310 if (state->n_rdonly != 0) {
1311 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1312 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1315 if (newstate != state)
1319 * We may have performed cached opens for all three recoveries.
1320 * Check if we need to update the current stateid.
1322 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1323 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1324 write_seqlock(&state->seqlock);
1325 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1326 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1327 write_sequnlock(&state->seqlock);
1334 * reclaim state on the server after a reboot.
1336 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1338 struct nfs_delegation *delegation;
1339 struct nfs4_opendata *opendata;
1340 fmode_t delegation_type = 0;
1343 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1344 NFS4_OPEN_CLAIM_PREVIOUS);
1345 if (IS_ERR(opendata))
1346 return PTR_ERR(opendata);
1348 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1349 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1350 delegation_type = delegation->type;
1352 opendata->o_arg.u.delegation_type = delegation_type;
1353 status = nfs4_open_recover(opendata, state);
1354 nfs4_opendata_put(opendata);
1358 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1360 struct nfs_server *server = NFS_SERVER(state->inode);
1361 struct nfs4_exception exception = { };
1364 err = _nfs4_do_open_reclaim(ctx, state);
1365 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1367 if (err != -NFS4ERR_DELAY)
1369 nfs4_handle_exception(server, err, &exception);
1370 } while (exception.retry);
1374 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1376 struct nfs_open_context *ctx;
1379 ctx = nfs4_state_find_open_context(state);
1382 ret = nfs4_do_open_reclaim(ctx, state);
1383 put_nfs_open_context(ctx);
1387 static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1391 printk(KERN_ERR "NFS: %s: unhandled error "
1392 "%d.\n", __func__, err);
1397 case -NFS4ERR_BADSESSION:
1398 case -NFS4ERR_BADSLOT:
1399 case -NFS4ERR_BAD_HIGH_SLOT:
1400 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1401 case -NFS4ERR_DEADSESSION:
1402 set_bit(NFS_DELEGATED_STATE, &state->flags);
1403 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1405 case -NFS4ERR_STALE_CLIENTID:
1406 case -NFS4ERR_STALE_STATEID:
1407 set_bit(NFS_DELEGATED_STATE, &state->flags);
1408 case -NFS4ERR_EXPIRED:
1409 /* Don't recall a delegation if it was lost */
1410 nfs4_schedule_lease_recovery(server->nfs_client);
1412 case -NFS4ERR_DELEG_REVOKED:
1413 case -NFS4ERR_ADMIN_REVOKED:
1414 case -NFS4ERR_BAD_STATEID:
1415 case -NFS4ERR_OPENMODE:
1416 nfs_inode_find_state_and_recover(state->inode,
1418 nfs4_schedule_stateid_recovery(server, state);
1420 case -NFS4ERR_DELAY:
1421 case -NFS4ERR_GRACE:
1422 set_bit(NFS_DELEGATED_STATE, &state->flags);
1426 case -NFS4ERR_DENIED:
1427 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1433 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1435 struct nfs_server *server = NFS_SERVER(state->inode);
1436 struct nfs4_opendata *opendata;
1439 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1440 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1441 if (IS_ERR(opendata))
1442 return PTR_ERR(opendata);
1443 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1444 err = nfs4_open_recover(opendata, state);
1445 nfs4_opendata_put(opendata);
1446 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1449 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1451 struct nfs4_opendata *data = calldata;
1453 data->rpc_status = task->tk_status;
1454 if (data->rpc_status == 0) {
1455 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1456 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1457 renew_lease(data->o_res.server, data->timestamp);
1462 static void nfs4_open_confirm_release(void *calldata)
1464 struct nfs4_opendata *data = calldata;
1465 struct nfs4_state *state = NULL;
1467 /* If this request hasn't been cancelled, do nothing */
1468 if (data->cancelled == 0)
1470 /* In case of error, no cleanup! */
1471 if (!data->rpc_done)
1473 state = nfs4_opendata_to_nfs4_state(data);
1475 nfs4_close_state(state, data->o_arg.fmode);
1477 nfs4_opendata_put(data);
1480 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1481 .rpc_call_done = nfs4_open_confirm_done,
1482 .rpc_release = nfs4_open_confirm_release,
1486 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1488 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1490 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1491 struct rpc_task *task;
1492 struct rpc_message msg = {
1493 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1494 .rpc_argp = &data->c_arg,
1495 .rpc_resp = &data->c_res,
1496 .rpc_cred = data->owner->so_cred,
1498 struct rpc_task_setup task_setup_data = {
1499 .rpc_client = server->client,
1500 .rpc_message = &msg,
1501 .callback_ops = &nfs4_open_confirm_ops,
1502 .callback_data = data,
1503 .workqueue = nfsiod_workqueue,
1504 .flags = RPC_TASK_ASYNC,
1508 kref_get(&data->kref);
1510 data->rpc_status = 0;
1511 data->timestamp = jiffies;
1512 task = rpc_run_task(&task_setup_data);
1514 return PTR_ERR(task);
1515 status = nfs4_wait_for_completion_rpc_task(task);
1517 data->cancelled = 1;
1520 status = data->rpc_status;
1525 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1527 struct nfs4_opendata *data = calldata;
1528 struct nfs4_state_owner *sp = data->owner;
1529 struct nfs_client *clp = sp->so_server->nfs_client;
1531 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1534 * Check if we still need to send an OPEN call, or if we can use
1535 * a delegation instead.
1537 if (data->state != NULL) {
1538 struct nfs_delegation *delegation;
1540 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1543 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1544 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1545 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
1546 can_open_delegated(delegation, data->o_arg.fmode))
1547 goto unlock_no_action;
1550 /* Update client id. */
1551 data->o_arg.clientid = clp->cl_clientid;
1552 switch (data->o_arg.claim) {
1553 case NFS4_OPEN_CLAIM_PREVIOUS:
1554 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1555 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1556 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
1557 case NFS4_OPEN_CLAIM_FH:
1558 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1559 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1561 data->timestamp = jiffies;
1562 if (nfs4_setup_sequence(data->o_arg.server,
1563 &data->o_arg.seq_args,
1564 &data->o_res.seq_res,
1566 nfs_release_seqid(data->o_arg.seqid);
1568 /* Set the create mode (note dependency on the session type) */
1569 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1570 if (data->o_arg.open_flags & O_EXCL) {
1571 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1572 if (nfs4_has_persistent_session(clp))
1573 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1574 else if (clp->cl_mvops->minor_version > 0)
1575 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1581 task->tk_action = NULL;
1583 nfs4_sequence_done(task, &data->o_res.seq_res);
1586 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1588 struct nfs4_opendata *data = calldata;
1590 data->rpc_status = task->tk_status;
1592 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1595 if (task->tk_status == 0) {
1596 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1597 switch (data->o_res.f_attr->mode & S_IFMT) {
1601 data->rpc_status = -ELOOP;
1604 data->rpc_status = -EISDIR;
1607 data->rpc_status = -ENOTDIR;
1610 renew_lease(data->o_res.server, data->timestamp);
1611 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1612 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1617 static void nfs4_open_release(void *calldata)
1619 struct nfs4_opendata *data = calldata;
1620 struct nfs4_state *state = NULL;
1622 /* If this request hasn't been cancelled, do nothing */
1623 if (data->cancelled == 0)
1625 /* In case of error, no cleanup! */
1626 if (data->rpc_status != 0 || !data->rpc_done)
1628 /* In case we need an open_confirm, no cleanup! */
1629 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1631 state = nfs4_opendata_to_nfs4_state(data);
1633 nfs4_close_state(state, data->o_arg.fmode);
1635 nfs4_opendata_put(data);
1638 static const struct rpc_call_ops nfs4_open_ops = {
1639 .rpc_call_prepare = nfs4_open_prepare,
1640 .rpc_call_done = nfs4_open_done,
1641 .rpc_release = nfs4_open_release,
1644 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1646 struct inode *dir = data->dir->d_inode;
1647 struct nfs_server *server = NFS_SERVER(dir);
1648 struct nfs_openargs *o_arg = &data->o_arg;
1649 struct nfs_openres *o_res = &data->o_res;
1650 struct rpc_task *task;
1651 struct rpc_message msg = {
1652 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1655 .rpc_cred = data->owner->so_cred,
1657 struct rpc_task_setup task_setup_data = {
1658 .rpc_client = server->client,
1659 .rpc_message = &msg,
1660 .callback_ops = &nfs4_open_ops,
1661 .callback_data = data,
1662 .workqueue = nfsiod_workqueue,
1663 .flags = RPC_TASK_ASYNC,
1667 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1668 kref_get(&data->kref);
1670 data->rpc_status = 0;
1671 data->cancelled = 0;
1672 data->is_recover = 0;
1674 nfs4_set_sequence_privileged(&o_arg->seq_args);
1675 data->is_recover = 1;
1677 task = rpc_run_task(&task_setup_data);
1679 return PTR_ERR(task);
1680 status = nfs4_wait_for_completion_rpc_task(task);
1682 data->cancelled = 1;
1685 status = data->rpc_status;
1691 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1693 struct inode *dir = data->dir->d_inode;
1694 struct nfs_openres *o_res = &data->o_res;
1697 status = nfs4_run_open_task(data, 1);
1698 if (status != 0 || !data->rpc_done)
1701 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1703 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1704 status = _nfs4_proc_open_confirm(data);
1712 static int nfs4_opendata_access(struct rpc_cred *cred,
1713 struct nfs4_opendata *opendata,
1714 struct nfs4_state *state, fmode_t fmode,
1717 struct nfs_access_entry cache;
1720 /* access call failed or for some reason the server doesn't
1721 * support any access modes -- defer access call until later */
1722 if (opendata->o_res.access_supported == 0)
1726 /* don't check MAY_WRITE - a newly created file may not have
1727 * write mode bits, but POSIX allows the creating process to write.
1728 * use openflags to check for exec, because fmode won't
1729 * always have FMODE_EXEC set when file open for exec. */
1730 if (openflags & __FMODE_EXEC) {
1731 /* ONLY check for exec rights */
1733 } else if (fmode & FMODE_READ)
1737 cache.jiffies = jiffies;
1738 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1739 nfs_access_add_cache(state->inode, &cache);
1741 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
1744 /* even though OPEN succeeded, access is denied. Close the file */
1745 nfs4_close_state(state, fmode);
1750 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1752 static int _nfs4_proc_open(struct nfs4_opendata *data)
1754 struct inode *dir = data->dir->d_inode;
1755 struct nfs_server *server = NFS_SERVER(dir);
1756 struct nfs_openargs *o_arg = &data->o_arg;
1757 struct nfs_openres *o_res = &data->o_res;
1760 status = nfs4_run_open_task(data, 0);
1761 if (!data->rpc_done)
1764 if (status == -NFS4ERR_BADNAME &&
1765 !(o_arg->open_flags & O_CREAT))
1770 nfs_fattr_map_and_free_names(server, &data->f_attr);
1772 if (o_arg->open_flags & O_CREAT)
1773 update_changeattr(dir, &o_res->cinfo);
1774 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1775 server->caps &= ~NFS_CAP_POSIX_LOCK;
1776 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1777 status = _nfs4_proc_open_confirm(data);
1781 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1782 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1786 static int nfs4_recover_expired_lease(struct nfs_server *server)
1788 return nfs4_client_recover_expired_lease(server->nfs_client);
1793 * reclaim state on the server after a network partition.
1794 * Assumes caller holds the appropriate lock
1796 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1798 struct nfs4_opendata *opendata;
1801 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1802 NFS4_OPEN_CLAIM_FH);
1803 if (IS_ERR(opendata))
1804 return PTR_ERR(opendata);
1805 ret = nfs4_open_recover(opendata, state);
1807 d_drop(ctx->dentry);
1808 nfs4_opendata_put(opendata);
1812 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1814 struct nfs_server *server = NFS_SERVER(state->inode);
1815 struct nfs4_exception exception = { };
1819 err = _nfs4_open_expired(ctx, state);
1820 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1825 case -NFS4ERR_GRACE:
1826 case -NFS4ERR_DELAY:
1827 nfs4_handle_exception(server, err, &exception);
1830 } while (exception.retry);
1835 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1837 struct nfs_open_context *ctx;
1840 ctx = nfs4_state_find_open_context(state);
1843 ret = nfs4_do_open_expired(ctx, state);
1844 put_nfs_open_context(ctx);
1848 #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;
2290 bool is_rdonly, is_wronly, is_rdwr;
2293 dprintk("%s: begin!\n", __func__);
2294 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2297 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2298 spin_lock(&state->owner->so_lock);
2299 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2300 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2301 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
2302 /* Calculate the change in open mode */
2303 calldata->arg.fmode = 0;
2304 if (state->n_rdwr == 0) {
2305 if (state->n_rdonly == 0)
2306 call_close |= is_rdonly;
2308 calldata->arg.fmode |= FMODE_READ;
2309 if (state->n_wronly == 0)
2310 call_close |= is_wronly;
2312 calldata->arg.fmode |= FMODE_WRITE;
2314 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2316 if (calldata->arg.fmode == 0)
2317 call_close |= is_rdwr;
2319 if (!nfs4_valid_open_stateid(state))
2321 spin_unlock(&state->owner->so_lock);
2324 /* Note: exit _without_ calling nfs4_close_done */
2328 if (calldata->arg.fmode == 0) {
2329 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2330 if (calldata->roc &&
2331 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2332 nfs_release_seqid(calldata->arg.seqid);
2337 nfs_fattr_init(calldata->res.fattr);
2338 calldata->timestamp = jiffies;
2339 if (nfs4_setup_sequence(NFS_SERVER(inode),
2340 &calldata->arg.seq_args,
2341 &calldata->res.seq_res,
2343 nfs_release_seqid(calldata->arg.seqid);
2344 dprintk("%s: done!\n", __func__);
2347 task->tk_action = NULL;
2349 nfs4_sequence_done(task, &calldata->res.seq_res);
2352 static const struct rpc_call_ops nfs4_close_ops = {
2353 .rpc_call_prepare = nfs4_close_prepare,
2354 .rpc_call_done = nfs4_close_done,
2355 .rpc_release = nfs4_free_closedata,
2359 * It is possible for data to be read/written from a mem-mapped file
2360 * after the sys_close call (which hits the vfs layer as a flush).
2361 * This means that we can't safely call nfsv4 close on a file until
2362 * the inode is cleared. This in turn means that we are not good
2363 * NFSv4 citizens - we do not indicate to the server to update the file's
2364 * share state even when we are done with one of the three share
2365 * stateid's in the inode.
2367 * NOTE: Caller must be holding the sp->so_owner semaphore!
2369 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
2371 struct nfs_server *server = NFS_SERVER(state->inode);
2372 struct nfs4_closedata *calldata;
2373 struct nfs4_state_owner *sp = state->owner;
2374 struct rpc_task *task;
2375 struct rpc_message msg = {
2376 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2377 .rpc_cred = state->owner->so_cred,
2379 struct rpc_task_setup task_setup_data = {
2380 .rpc_client = server->client,
2381 .rpc_message = &msg,
2382 .callback_ops = &nfs4_close_ops,
2383 .workqueue = nfsiod_workqueue,
2384 .flags = RPC_TASK_ASYNC,
2386 int status = -ENOMEM;
2388 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2389 if (calldata == NULL)
2391 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2392 calldata->inode = state->inode;
2393 calldata->state = state;
2394 calldata->arg.fh = NFS_FH(state->inode);
2395 calldata->arg.stateid = &state->open_stateid;
2396 /* Serialization for the sequence id */
2397 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2398 if (calldata->arg.seqid == NULL)
2399 goto out_free_calldata;
2400 calldata->arg.fmode = 0;
2401 calldata->arg.bitmask = server->cache_consistency_bitmask;
2402 calldata->res.fattr = &calldata->fattr;
2403 calldata->res.seqid = calldata->arg.seqid;
2404 calldata->res.server = server;
2405 calldata->roc = pnfs_roc(state->inode);
2406 nfs_sb_active(calldata->inode->i_sb);
2408 msg.rpc_argp = &calldata->arg;
2409 msg.rpc_resp = &calldata->res;
2410 task_setup_data.callback_data = calldata;
2411 task = rpc_run_task(&task_setup_data);
2413 return PTR_ERR(task);
2416 status = rpc_wait_for_completion_task(task);
2422 nfs4_put_open_state(state);
2423 nfs4_put_state_owner(sp);
2427 static struct inode *
2428 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2430 struct nfs4_state *state;
2432 /* Protect against concurrent sillydeletes */
2433 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2434 ctx->cred, &ctx->mdsthreshold);
2436 return ERR_CAST(state);
2438 return igrab(state->inode);
2441 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2443 if (ctx->state == NULL)
2446 nfs4_close_sync(ctx->state, ctx->mode);
2448 nfs4_close_state(ctx->state, ctx->mode);
2451 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2453 struct nfs4_server_caps_arg args = {
2456 struct nfs4_server_caps_res res = {};
2457 struct rpc_message msg = {
2458 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2464 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2466 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2467 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2468 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2469 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2470 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2471 NFS_CAP_CTIME|NFS_CAP_MTIME);
2472 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2473 server->caps |= NFS_CAP_ACLS;
2474 if (res.has_links != 0)
2475 server->caps |= NFS_CAP_HARDLINKS;
2476 if (res.has_symlinks != 0)
2477 server->caps |= NFS_CAP_SYMLINKS;
2478 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2479 server->caps |= NFS_CAP_FILEID;
2480 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2481 server->caps |= NFS_CAP_MODE;
2482 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2483 server->caps |= NFS_CAP_NLINK;
2484 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2485 server->caps |= NFS_CAP_OWNER;
2486 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2487 server->caps |= NFS_CAP_OWNER_GROUP;
2488 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2489 server->caps |= NFS_CAP_ATIME;
2490 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2491 server->caps |= NFS_CAP_CTIME;
2492 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2493 server->caps |= NFS_CAP_MTIME;
2495 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2496 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2497 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2498 server->acl_bitmask = res.acl_bitmask;
2499 server->fh_expire_type = res.fh_expire_type;
2505 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2507 struct nfs4_exception exception = { };
2510 err = nfs4_handle_exception(server,
2511 _nfs4_server_capabilities(server, fhandle),
2513 } while (exception.retry);
2517 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2518 struct nfs_fsinfo *info)
2520 struct nfs4_lookup_root_arg args = {
2521 .bitmask = nfs4_fattr_bitmap,
2523 struct nfs4_lookup_res res = {
2525 .fattr = info->fattr,
2528 struct rpc_message msg = {
2529 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2534 nfs_fattr_init(info->fattr);
2535 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2538 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2539 struct nfs_fsinfo *info)
2541 struct nfs4_exception exception = { };
2544 err = _nfs4_lookup_root(server, fhandle, info);
2547 case -NFS4ERR_WRONGSEC:
2550 err = nfs4_handle_exception(server, err, &exception);
2552 } while (exception.retry);
2557 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2558 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2560 struct rpc_auth *auth;
2563 auth = rpcauth_create(flavor, server->client);
2568 ret = nfs4_lookup_root(server, fhandle, info);
2574 * Retry pseudoroot lookup with various security flavors. We do this when:
2576 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2577 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2579 * Returns zero on success, or a negative NFS4ERR value, or a
2580 * negative errno value.
2582 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2583 struct nfs_fsinfo *info)
2585 /* Per 3530bis 15.33.5 */
2586 static const rpc_authflavor_t flav_array[] = {
2590 RPC_AUTH_UNIX, /* courtesy */
2593 int status = -EPERM;
2596 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
2597 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2598 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2604 * -EACCESS could mean that the user doesn't have correct permissions
2605 * to access the mount. It could also mean that we tried to mount
2606 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2607 * existing mount programs don't handle -EACCES very well so it should
2608 * be mapped to -EPERM instead.
2610 if (status == -EACCES)
2615 static int nfs4_do_find_root_sec(struct nfs_server *server,
2616 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2618 int mv = server->nfs_client->cl_minorversion;
2619 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2623 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2624 * @server: initialized nfs_server handle
2625 * @fhandle: we fill in the pseudo-fs root file handle
2626 * @info: we fill in an FSINFO struct
2628 * Returns zero on success, or a negative errno.
2630 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2631 struct nfs_fsinfo *info)
2635 status = nfs4_lookup_root(server, fhandle, info);
2636 if ((status == -NFS4ERR_WRONGSEC) &&
2637 !(server->flags & NFS_MOUNT_SECFLAVOUR))
2638 status = nfs4_do_find_root_sec(server, fhandle, info);
2641 status = nfs4_server_capabilities(server, fhandle);
2643 status = nfs4_do_fsinfo(server, fhandle, info);
2645 return nfs4_map_errors(status);
2648 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2649 struct nfs_fsinfo *info)
2652 struct nfs_fattr *fattr = info->fattr;
2654 error = nfs4_server_capabilities(server, mntfh);
2656 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2660 error = nfs4_proc_getattr(server, mntfh, fattr);
2662 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2666 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2667 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2668 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2674 * Get locations and (maybe) other attributes of a referral.
2675 * Note that we'll actually follow the referral later when
2676 * we detect fsid mismatch in inode revalidation
2678 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2679 const struct qstr *name, struct nfs_fattr *fattr,
2680 struct nfs_fh *fhandle)
2682 int status = -ENOMEM;
2683 struct page *page = NULL;
2684 struct nfs4_fs_locations *locations = NULL;
2686 page = alloc_page(GFP_KERNEL);
2689 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2690 if (locations == NULL)
2693 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
2696 /* Make sure server returned a different fsid for the referral */
2697 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2698 dprintk("%s: server did not return a different fsid for"
2699 " a referral at %s\n", __func__, name->name);
2703 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2704 nfs_fixup_referral_attributes(&locations->fattr);
2706 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2707 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2708 memset(fhandle, 0, sizeof(struct nfs_fh));
2716 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2718 struct nfs4_getattr_arg args = {
2720 .bitmask = server->attr_bitmask,
2722 struct nfs4_getattr_res res = {
2726 struct rpc_message msg = {
2727 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2732 nfs_fattr_init(fattr);
2733 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2736 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2738 struct nfs4_exception exception = { };
2741 err = nfs4_handle_exception(server,
2742 _nfs4_proc_getattr(server, fhandle, fattr),
2744 } while (exception.retry);
2749 * The file is not closed if it is opened due to the a request to change
2750 * the size of the file. The open call will not be needed once the
2751 * VFS layer lookup-intents are implemented.
2753 * Close is called when the inode is destroyed.
2754 * If we haven't opened the file for O_WRONLY, we
2755 * need to in the size_change case to obtain a stateid.
2758 * Because OPEN is always done by name in nfsv4, it is
2759 * possible that we opened a different file by the same
2760 * name. We can recognize this race condition, but we
2761 * can't do anything about it besides returning an error.
2763 * This will be fixed with VFS changes (lookup-intent).
2766 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2767 struct iattr *sattr)
2769 struct inode *inode = dentry->d_inode;
2770 struct rpc_cred *cred = NULL;
2771 struct nfs4_state *state = NULL;
2774 if (pnfs_ld_layoutret_on_setattr(inode))
2775 pnfs_commit_and_return_layout(inode);
2777 nfs_fattr_init(fattr);
2779 /* Deal with open(O_TRUNC) */
2780 if (sattr->ia_valid & ATTR_OPEN)
2781 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2783 /* Optimization: if the end result is no change, don't RPC */
2784 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2787 /* Search for an existing open(O_WRITE) file */
2788 if (sattr->ia_valid & ATTR_FILE) {
2789 struct nfs_open_context *ctx;
2791 ctx = nfs_file_open_context(sattr->ia_file);
2798 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2800 nfs_setattr_update_inode(inode, sattr);
2804 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2805 const struct qstr *name, struct nfs_fh *fhandle,
2806 struct nfs_fattr *fattr)
2808 struct nfs_server *server = NFS_SERVER(dir);
2810 struct nfs4_lookup_arg args = {
2811 .bitmask = server->attr_bitmask,
2812 .dir_fh = NFS_FH(dir),
2815 struct nfs4_lookup_res res = {
2820 struct rpc_message msg = {
2821 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2826 nfs_fattr_init(fattr);
2828 dprintk("NFS call lookup %s\n", name->name);
2829 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2830 dprintk("NFS reply lookup: %d\n", status);
2834 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
2836 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2837 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
2838 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2842 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2843 struct qstr *name, struct nfs_fh *fhandle,
2844 struct nfs_fattr *fattr)
2846 struct nfs4_exception exception = { };
2847 struct rpc_clnt *client = *clnt;
2850 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2852 case -NFS4ERR_BADNAME:
2855 case -NFS4ERR_MOVED:
2856 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
2858 case -NFS4ERR_WRONGSEC:
2860 if (client != *clnt)
2863 client = nfs4_create_sec_client(client, dir, name);
2865 return PTR_ERR(client);
2867 exception.retry = 1;
2870 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
2872 } while (exception.retry);
2877 else if (client != *clnt)
2878 rpc_shutdown_client(client);
2883 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
2884 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2887 struct rpc_clnt *client = NFS_CLIENT(dir);
2889 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2890 if (client != NFS_CLIENT(dir)) {
2891 rpc_shutdown_client(client);
2892 nfs_fixup_secinfo_attributes(fattr);
2898 nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2899 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2902 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2904 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2906 rpc_shutdown_client(client);
2907 return ERR_PTR(status);
2912 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2914 struct nfs_server *server = NFS_SERVER(inode);
2915 struct nfs4_accessargs args = {
2916 .fh = NFS_FH(inode),
2917 .bitmask = server->cache_consistency_bitmask,
2919 struct nfs4_accessres res = {
2922 struct rpc_message msg = {
2923 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2926 .rpc_cred = entry->cred,
2928 int mode = entry->mask;
2932 * Determine which access bits we want to ask for...
2934 if (mode & MAY_READ)
2935 args.access |= NFS4_ACCESS_READ;
2936 if (S_ISDIR(inode->i_mode)) {
2937 if (mode & MAY_WRITE)
2938 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2939 if (mode & MAY_EXEC)
2940 args.access |= NFS4_ACCESS_LOOKUP;
2942 if (mode & MAY_WRITE)
2943 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2944 if (mode & MAY_EXEC)
2945 args.access |= NFS4_ACCESS_EXECUTE;
2948 res.fattr = nfs_alloc_fattr();
2949 if (res.fattr == NULL)
2952 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2954 nfs_access_set_mask(entry, res.access);
2955 nfs_refresh_inode(inode, res.fattr);
2957 nfs_free_fattr(res.fattr);
2961 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2963 struct nfs4_exception exception = { };
2966 err = nfs4_handle_exception(NFS_SERVER(inode),
2967 _nfs4_proc_access(inode, entry),
2969 } while (exception.retry);
2974 * TODO: For the time being, we don't try to get any attributes
2975 * along with any of the zero-copy operations READ, READDIR,
2978 * In the case of the first three, we want to put the GETATTR
2979 * after the read-type operation -- this is because it is hard
2980 * to predict the length of a GETATTR response in v4, and thus
2981 * align the READ data correctly. This means that the GETATTR
2982 * may end up partially falling into the page cache, and we should
2983 * shift it into the 'tail' of the xdr_buf before processing.
2984 * To do this efficiently, we need to know the total length
2985 * of data received, which doesn't seem to be available outside
2988 * In the case of WRITE, we also want to put the GETATTR after
2989 * the operation -- in this case because we want to make sure
2990 * we get the post-operation mtime and size.
2992 * Both of these changes to the XDR layer would in fact be quite
2993 * minor, but I decided to leave them for a subsequent patch.
2995 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2996 unsigned int pgbase, unsigned int pglen)
2998 struct nfs4_readlink args = {
2999 .fh = NFS_FH(inode),
3004 struct nfs4_readlink_res res;
3005 struct rpc_message msg = {
3006 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3011 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
3014 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3015 unsigned int pgbase, unsigned int pglen)
3017 struct nfs4_exception exception = { };
3020 err = nfs4_handle_exception(NFS_SERVER(inode),
3021 _nfs4_proc_readlink(inode, page, pgbase, pglen),
3023 } while (exception.retry);
3028 * This is just for mknod. open(O_CREAT) will always do ->open_context().
3031 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
3034 struct nfs_open_context *ctx;
3035 struct nfs4_state *state;
3038 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3040 return PTR_ERR(ctx);
3042 sattr->ia_mode &= ~current_umask();
3043 state = nfs4_do_open(dir, dentry, ctx->mode,
3044 flags, sattr, ctx->cred,
3045 &ctx->mdsthreshold);
3047 if (IS_ERR(state)) {
3048 status = PTR_ERR(state);
3051 d_add(dentry, igrab(state->inode));
3052 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
3055 put_nfs_open_context(ctx);
3059 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3061 struct nfs_server *server = NFS_SERVER(dir);
3062 struct nfs_removeargs args = {
3066 struct nfs_removeres res = {
3069 struct rpc_message msg = {
3070 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3076 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
3078 update_changeattr(dir, &res.cinfo);
3082 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3084 struct nfs4_exception exception = { };
3087 err = nfs4_handle_exception(NFS_SERVER(dir),
3088 _nfs4_proc_remove(dir, name),
3090 } while (exception.retry);
3094 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
3096 struct nfs_server *server = NFS_SERVER(dir);
3097 struct nfs_removeargs *args = msg->rpc_argp;
3098 struct nfs_removeres *res = msg->rpc_resp;
3100 res->server = server;
3101 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
3102 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
3105 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3107 nfs4_setup_sequence(NFS_SERVER(data->dir),
3108 &data->args.seq_args,
3113 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
3115 struct nfs_removeres *res = task->tk_msg.rpc_resp;
3117 if (!nfs4_sequence_done(task, &res->seq_res))
3119 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3121 update_changeattr(dir, &res->cinfo);
3125 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3127 struct nfs_server *server = NFS_SERVER(dir);
3128 struct nfs_renameargs *arg = msg->rpc_argp;
3129 struct nfs_renameres *res = msg->rpc_resp;
3131 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
3132 res->server = server;
3133 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
3136 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3138 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3139 &data->args.seq_args,
3144 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3145 struct inode *new_dir)
3147 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3149 if (!nfs4_sequence_done(task, &res->seq_res))
3151 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3154 update_changeattr(old_dir, &res->old_cinfo);
3155 update_changeattr(new_dir, &res->new_cinfo);
3159 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3160 struct inode *new_dir, struct qstr *new_name)
3162 struct nfs_server *server = NFS_SERVER(old_dir);
3163 struct nfs_renameargs arg = {
3164 .old_dir = NFS_FH(old_dir),
3165 .new_dir = NFS_FH(new_dir),
3166 .old_name = old_name,
3167 .new_name = new_name,
3169 struct nfs_renameres res = {
3172 struct rpc_message msg = {
3173 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3177 int status = -ENOMEM;
3179 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3181 update_changeattr(old_dir, &res.old_cinfo);
3182 update_changeattr(new_dir, &res.new_cinfo);
3187 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3188 struct inode *new_dir, struct qstr *new_name)
3190 struct nfs4_exception exception = { };
3193 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3194 _nfs4_proc_rename(old_dir, old_name,
3197 } while (exception.retry);
3201 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3203 struct nfs_server *server = NFS_SERVER(inode);
3204 struct nfs4_link_arg arg = {
3205 .fh = NFS_FH(inode),
3206 .dir_fh = NFS_FH(dir),
3208 .bitmask = server->attr_bitmask,
3210 struct nfs4_link_res res = {
3213 struct rpc_message msg = {
3214 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3218 int status = -ENOMEM;
3220 res.fattr = nfs_alloc_fattr();
3221 if (res.fattr == NULL)
3224 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3226 update_changeattr(dir, &res.cinfo);
3227 nfs_post_op_update_inode(inode, res.fattr);
3230 nfs_free_fattr(res.fattr);
3234 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3236 struct nfs4_exception exception = { };
3239 err = nfs4_handle_exception(NFS_SERVER(inode),
3240 _nfs4_proc_link(inode, dir, name),
3242 } while (exception.retry);
3246 struct nfs4_createdata {
3247 struct rpc_message msg;
3248 struct nfs4_create_arg arg;
3249 struct nfs4_create_res res;
3251 struct nfs_fattr fattr;
3254 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3255 struct qstr *name, struct iattr *sattr, u32 ftype)
3257 struct nfs4_createdata *data;
3259 data = kzalloc(sizeof(*data), GFP_KERNEL);
3261 struct nfs_server *server = NFS_SERVER(dir);
3263 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3264 data->msg.rpc_argp = &data->arg;
3265 data->msg.rpc_resp = &data->res;
3266 data->arg.dir_fh = NFS_FH(dir);
3267 data->arg.server = server;
3268 data->arg.name = name;
3269 data->arg.attrs = sattr;
3270 data->arg.ftype = ftype;
3271 data->arg.bitmask = server->attr_bitmask;
3272 data->res.server = server;
3273 data->res.fh = &data->fh;
3274 data->res.fattr = &data->fattr;
3275 nfs_fattr_init(data->res.fattr);
3280 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3282 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3283 &data->arg.seq_args, &data->res.seq_res, 1);
3285 update_changeattr(dir, &data->res.dir_cinfo);
3286 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3291 static void nfs4_free_createdata(struct nfs4_createdata *data)
3296 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3297 struct page *page, unsigned int len, struct iattr *sattr)
3299 struct nfs4_createdata *data;
3300 int status = -ENAMETOOLONG;
3302 if (len > NFS4_MAXPATHLEN)
3306 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3310 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3311 data->arg.u.symlink.pages = &page;
3312 data->arg.u.symlink.len = len;
3314 status = nfs4_do_create(dir, dentry, data);
3316 nfs4_free_createdata(data);
3321 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3322 struct page *page, unsigned int len, struct iattr *sattr)
3324 struct nfs4_exception exception = { };
3327 err = nfs4_handle_exception(NFS_SERVER(dir),
3328 _nfs4_proc_symlink(dir, dentry, page,
3331 } while (exception.retry);
3335 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3336 struct iattr *sattr)
3338 struct nfs4_createdata *data;
3339 int status = -ENOMEM;
3341 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3345 status = nfs4_do_create(dir, dentry, data);
3347 nfs4_free_createdata(data);
3352 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3353 struct iattr *sattr)
3355 struct nfs4_exception exception = { };
3358 sattr->ia_mode &= ~current_umask();
3360 err = nfs4_handle_exception(NFS_SERVER(dir),
3361 _nfs4_proc_mkdir(dir, dentry, sattr),
3363 } while (exception.retry);
3367 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3368 u64 cookie, struct page **pages, unsigned int count, int plus)
3370 struct inode *dir = dentry->d_inode;
3371 struct nfs4_readdir_arg args = {
3376 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3379 struct nfs4_readdir_res res;
3380 struct rpc_message msg = {
3381 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3388 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3389 dentry->d_parent->d_name.name,
3390 dentry->d_name.name,
3391 (unsigned long long)cookie);
3392 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
3393 res.pgbase = args.pgbase;
3394 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3396 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
3397 status += args.pgbase;
3400 nfs_invalidate_atime(dir);
3402 dprintk("%s: returns %d\n", __func__, status);
3406 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3407 u64 cookie, struct page **pages, unsigned int count, int plus)
3409 struct nfs4_exception exception = { };
3412 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3413 _nfs4_proc_readdir(dentry, cred, cookie,
3414 pages, count, plus),
3416 } while (exception.retry);
3420 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3421 struct iattr *sattr, dev_t rdev)
3423 struct nfs4_createdata *data;
3424 int mode = sattr->ia_mode;
3425 int status = -ENOMEM;
3427 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3432 data->arg.ftype = NF4FIFO;
3433 else if (S_ISBLK(mode)) {
3434 data->arg.ftype = NF4BLK;
3435 data->arg.u.device.specdata1 = MAJOR(rdev);
3436 data->arg.u.device.specdata2 = MINOR(rdev);
3438 else if (S_ISCHR(mode)) {
3439 data->arg.ftype = NF4CHR;
3440 data->arg.u.device.specdata1 = MAJOR(rdev);
3441 data->arg.u.device.specdata2 = MINOR(rdev);
3442 } else if (!S_ISSOCK(mode)) {
3447 status = nfs4_do_create(dir, dentry, data);
3449 nfs4_free_createdata(data);
3454 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3455 struct iattr *sattr, dev_t rdev)
3457 struct nfs4_exception exception = { };
3460 sattr->ia_mode &= ~current_umask();
3462 err = nfs4_handle_exception(NFS_SERVER(dir),
3463 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3465 } while (exception.retry);
3469 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3470 struct nfs_fsstat *fsstat)
3472 struct nfs4_statfs_arg args = {
3474 .bitmask = server->attr_bitmask,
3476 struct nfs4_statfs_res res = {
3479 struct rpc_message msg = {
3480 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3485 nfs_fattr_init(fsstat->fattr);
3486 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3489 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3491 struct nfs4_exception exception = { };
3494 err = nfs4_handle_exception(server,
3495 _nfs4_proc_statfs(server, fhandle, fsstat),
3497 } while (exception.retry);
3501 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3502 struct nfs_fsinfo *fsinfo)
3504 struct nfs4_fsinfo_arg args = {
3506 .bitmask = server->attr_bitmask,
3508 struct nfs4_fsinfo_res res = {
3511 struct rpc_message msg = {
3512 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3517 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3520 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3522 struct nfs4_exception exception = { };
3523 unsigned long now = jiffies;
3527 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
3529 struct nfs_client *clp = server->nfs_client;
3531 spin_lock(&clp->cl_lock);
3532 clp->cl_lease_time = fsinfo->lease_time * HZ;
3533 clp->cl_last_renewal = now;
3534 spin_unlock(&clp->cl_lock);
3537 err = nfs4_handle_exception(server, err, &exception);
3538 } while (exception.retry);
3542 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3546 nfs_fattr_init(fsinfo->fattr);
3547 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
3549 /* block layout checks this! */
3550 server->pnfs_blksize = fsinfo->blksize;
3551 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
3557 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3558 struct nfs_pathconf *pathconf)
3560 struct nfs4_pathconf_arg args = {
3562 .bitmask = server->attr_bitmask,
3564 struct nfs4_pathconf_res res = {
3565 .pathconf = pathconf,
3567 struct rpc_message msg = {
3568 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3573 /* None of the pathconf attributes are mandatory to implement */
3574 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3575 memset(pathconf, 0, sizeof(*pathconf));
3579 nfs_fattr_init(pathconf->fattr);
3580 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3583 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3584 struct nfs_pathconf *pathconf)
3586 struct nfs4_exception exception = { };
3590 err = nfs4_handle_exception(server,
3591 _nfs4_proc_pathconf(server, fhandle, pathconf),
3593 } while (exception.retry);
3597 int nfs4_set_rw_stateid(nfs4_stateid *stateid,
3598 const struct nfs_open_context *ctx,
3599 const struct nfs_lock_context *l_ctx,
3602 const struct nfs_lockowner *lockowner = NULL;
3605 lockowner = &l_ctx->lockowner;
3606 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
3608 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3610 static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3611 const struct nfs_open_context *ctx,
3612 const struct nfs_lock_context *l_ctx,
3615 nfs4_stateid current_stateid;
3617 /* If the current stateid represents a lost lock, then exit */
3618 if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode) == -EIO)
3620 return nfs4_stateid_match(stateid, ¤t_stateid);
3623 static bool nfs4_error_stateid_expired(int err)
3626 case -NFS4ERR_DELEG_REVOKED:
3627 case -NFS4ERR_ADMIN_REVOKED:
3628 case -NFS4ERR_BAD_STATEID:
3629 case -NFS4ERR_STALE_STATEID:
3630 case -NFS4ERR_OLD_STATEID:
3631 case -NFS4ERR_OPENMODE:
3632 case -NFS4ERR_EXPIRED:
3638 void __nfs4_read_done_cb(struct nfs_read_data *data)
3640 nfs_invalidate_atime(data->header->inode);
3643 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3645 struct nfs_server *server = NFS_SERVER(data->header->inode);
3647 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3648 rpc_restart_call_prepare(task);
3652 __nfs4_read_done_cb(data);
3653 if (task->tk_status > 0)
3654 renew_lease(server, data->timestamp);
3658 static bool nfs4_read_stateid_changed(struct rpc_task *task,
3659 struct nfs_readargs *args)
3662 if (!nfs4_error_stateid_expired(task->tk_status) ||
3663 nfs4_stateid_is_current(&args->stateid,
3668 rpc_restart_call_prepare(task);
3672 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3675 dprintk("--> %s\n", __func__);
3677 if (!nfs4_sequence_done(task, &data->res.seq_res))
3679 if (nfs4_read_stateid_changed(task, &data->args))
3681 return data->read_done_cb ? data->read_done_cb(task, data) :
3682 nfs4_read_done_cb(task, data);
3685 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3687 data->timestamp = jiffies;
3688 data->read_done_cb = nfs4_read_done_cb;
3689 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3690 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
3693 static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3695 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3696 &data->args.seq_args,
3700 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3701 data->args.lock_context, FMODE_READ);
3704 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3706 struct inode *inode = data->header->inode;
3708 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3709 rpc_restart_call_prepare(task);
3712 if (task->tk_status >= 0) {
3713 renew_lease(NFS_SERVER(inode), data->timestamp);
3714 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
3719 static bool nfs4_write_stateid_changed(struct rpc_task *task,
3720 struct nfs_writeargs *args)
3723 if (!nfs4_error_stateid_expired(task->tk_status) ||
3724 nfs4_stateid_is_current(&args->stateid,
3729 rpc_restart_call_prepare(task);
3733 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3735 if (!nfs4_sequence_done(task, &data->res.seq_res))
3737 if (nfs4_write_stateid_changed(task, &data->args))
3739 return data->write_done_cb ? data->write_done_cb(task, data) :
3740 nfs4_write_done_cb(task, data);
3744 bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
3746 const struct nfs_pgio_header *hdr = data->header;
3748 /* Don't request attributes for pNFS or O_DIRECT writes */
3749 if (data->ds_clp != NULL || hdr->dreq != NULL)
3751 /* Otherwise, request attributes if and only if we don't hold
3754 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
3757 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3759 struct nfs_server *server = NFS_SERVER(data->header->inode);
3761 if (!nfs4_write_need_cache_consistency_data(data)) {
3762 data->args.bitmask = NULL;
3763 data->res.fattr = NULL;
3765 data->args.bitmask = server->cache_consistency_bitmask;
3767 if (!data->write_done_cb)
3768 data->write_done_cb = nfs4_write_done_cb;
3769 data->res.server = server;
3770 data->timestamp = jiffies;
3772 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3773 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3776 static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3778 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3779 &data->args.seq_args,
3783 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3784 data->args.lock_context, FMODE_WRITE);
3787 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
3789 nfs4_setup_sequence(NFS_SERVER(data->inode),
3790 &data->args.seq_args,
3795 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
3797 struct inode *inode = data->inode;
3799 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3800 rpc_restart_call_prepare(task);
3806 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
3808 if (!nfs4_sequence_done(task, &data->res.seq_res))
3810 return data->commit_done_cb(task, data);
3813 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
3815 struct nfs_server *server = NFS_SERVER(data->inode);
3817 if (data->commit_done_cb == NULL)
3818 data->commit_done_cb = nfs4_commit_done_cb;
3819 data->res.server = server;
3820 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3821 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3824 struct nfs4_renewdata {
3825 struct nfs_client *client;
3826 unsigned long timestamp;
3830 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3831 * standalone procedure for queueing an asynchronous RENEW.
3833 static void nfs4_renew_release(void *calldata)
3835 struct nfs4_renewdata *data = calldata;
3836 struct nfs_client *clp = data->client;
3838 if (atomic_read(&clp->cl_count) > 1)
3839 nfs4_schedule_state_renewal(clp);
3840 nfs_put_client(clp);
3844 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3846 struct nfs4_renewdata *data = calldata;
3847 struct nfs_client *clp = data->client;
3848 unsigned long timestamp = data->timestamp;
3850 if (task->tk_status < 0) {
3851 /* Unless we're shutting down, schedule state recovery! */
3852 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3854 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3855 nfs4_schedule_lease_recovery(clp);
3858 nfs4_schedule_path_down_recovery(clp);
3860 do_renew_lease(clp, timestamp);
3863 static const struct rpc_call_ops nfs4_renew_ops = {
3864 .rpc_call_done = nfs4_renew_done,
3865 .rpc_release = nfs4_renew_release,
3868 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3870 struct rpc_message msg = {
3871 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3875 struct nfs4_renewdata *data;
3877 if (renew_flags == 0)
3879 if (!atomic_inc_not_zero(&clp->cl_count))
3881 data = kmalloc(sizeof(*data), GFP_NOFS);
3885 data->timestamp = jiffies;
3886 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
3887 &nfs4_renew_ops, data);
3890 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3892 struct rpc_message msg = {
3893 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3897 unsigned long now = jiffies;
3900 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3903 do_renew_lease(clp, now);
3907 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3909 return (server->caps & NFS_CAP_ACLS)
3910 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3911 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3914 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3915 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
3918 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
3920 static int buf_to_pages_noslab(const void *buf, size_t buflen,
3921 struct page **pages, unsigned int *pgbase)
3923 struct page *newpage, **spages;
3929 len = min_t(size_t, PAGE_SIZE, buflen);
3930 newpage = alloc_page(GFP_KERNEL);
3932 if (newpage == NULL)
3934 memcpy(page_address(newpage), buf, len);
3939 } while (buflen != 0);
3945 __free_page(spages[rc-1]);
3949 struct nfs4_cached_acl {
3955 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3957 struct nfs_inode *nfsi = NFS_I(inode);
3959 spin_lock(&inode->i_lock);
3960 kfree(nfsi->nfs4_acl);
3961 nfsi->nfs4_acl = acl;
3962 spin_unlock(&inode->i_lock);
3965 static void nfs4_zap_acl_attr(struct inode *inode)
3967 nfs4_set_cached_acl(inode, NULL);
3970 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3972 struct nfs_inode *nfsi = NFS_I(inode);
3973 struct nfs4_cached_acl *acl;
3976 spin_lock(&inode->i_lock);
3977 acl = nfsi->nfs4_acl;
3980 if (buf == NULL) /* user is just asking for length */
3982 if (acl->cached == 0)
3984 ret = -ERANGE; /* see getxattr(2) man page */
3985 if (acl->len > buflen)
3987 memcpy(buf, acl->data, acl->len);
3991 spin_unlock(&inode->i_lock);
3995 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
3997 struct nfs4_cached_acl *acl;
3998 size_t buflen = sizeof(*acl) + acl_len;
4000 if (buflen <= PAGE_SIZE) {
4001 acl = kmalloc(buflen, GFP_KERNEL);
4005 _copy_from_pages(acl->data, pages, pgbase, acl_len);
4007 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4014 nfs4_set_cached_acl(inode, acl);
4018 * The getxattr API returns the required buffer length when called with a
4019 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4020 * the required buf. On a NULL buf, we send a page of data to the server
4021 * guessing that the ACL request can be serviced by a page. If so, we cache
4022 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4023 * the cache. If not so, we throw away the page, and cache the required
4024 * length. The next getxattr call will then produce another round trip to
4025 * the server, this time with the input buf of the required size.
4027 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4029 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
4030 struct nfs_getaclargs args = {
4031 .fh = NFS_FH(inode),
4035 struct nfs_getaclres res = {
4038 struct rpc_message msg = {
4039 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4043 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4044 int ret = -ENOMEM, i;
4046 /* As long as we're doing a round trip to the server anyway,
4047 * let's be prepared for a page of acl data. */
4050 if (npages > ARRAY_SIZE(pages))
4053 for (i = 0; i < npages; i++) {
4054 pages[i] = alloc_page(GFP_KERNEL);
4059 /* for decoding across pages */
4060 res.acl_scratch = alloc_page(GFP_KERNEL);
4061 if (!res.acl_scratch)
4064 args.acl_len = npages * PAGE_SIZE;
4065 args.acl_pgbase = 0;
4067 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
4068 __func__, buf, buflen, npages, args.acl_len);
4069 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4070 &msg, &args.seq_args, &res.seq_res, 0);
4074 /* Handle the case where the passed-in buffer is too short */
4075 if (res.acl_flags & NFS4_ACL_TRUNC) {
4076 /* Did the user only issue a request for the acl length? */
4082 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
4084 if (res.acl_len > buflen) {
4088 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
4093 for (i = 0; i < npages; i++)
4095 __free_page(pages[i]);
4096 if (res.acl_scratch)
4097 __free_page(res.acl_scratch);
4101 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4103 struct nfs4_exception exception = { };
4106 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4109 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4110 } while (exception.retry);
4114 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4116 struct nfs_server *server = NFS_SERVER(inode);
4119 if (!nfs4_server_supports_acls(server))
4121 ret = nfs_revalidate_inode(server, inode);
4124 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4125 nfs_zap_acl_cache(inode);
4126 ret = nfs4_read_cached_acl(inode, buf, buflen);
4128 /* -ENOENT is returned if there is no ACL or if there is an ACL
4129 * but no cached acl data, just the acl length */
4131 return nfs4_get_acl_uncached(inode, buf, buflen);
4134 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4136 struct nfs_server *server = NFS_SERVER(inode);
4137 struct page *pages[NFS4ACL_MAXPAGES];
4138 struct nfs_setaclargs arg = {
4139 .fh = NFS_FH(inode),
4143 struct nfs_setaclres res;
4144 struct rpc_message msg = {
4145 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4149 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4152 if (!nfs4_server_supports_acls(server))
4154 if (npages > ARRAY_SIZE(pages))
4156 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4159 nfs4_inode_return_delegation(inode);
4160 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4163 * Free each page after tx, so the only ref left is
4164 * held by the network stack
4167 put_page(pages[i-1]);
4170 * Acl update can result in inode attribute update.
4171 * so mark the attribute cache invalid.
4173 spin_lock(&inode->i_lock);
4174 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4175 spin_unlock(&inode->i_lock);
4176 nfs_access_zap_cache(inode);
4177 nfs_zap_acl_cache(inode);
4181 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4183 struct nfs4_exception exception = { };
4186 err = nfs4_handle_exception(NFS_SERVER(inode),
4187 __nfs4_proc_set_acl(inode, buf, buflen),
4189 } while (exception.retry);
4194 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
4196 struct nfs_client *clp = server->nfs_client;
4198 if (task->tk_status >= 0)
4200 switch(task->tk_status) {
4201 case -NFS4ERR_DELEG_REVOKED:
4202 case -NFS4ERR_ADMIN_REVOKED:
4203 case -NFS4ERR_BAD_STATEID:
4206 nfs_remove_bad_delegation(state->inode);
4207 case -NFS4ERR_OPENMODE:
4210 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4211 goto stateid_invalid;
4212 goto wait_on_recovery;
4213 case -NFS4ERR_EXPIRED:
4214 if (state != NULL) {
4215 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4216 goto stateid_invalid;
4218 case -NFS4ERR_STALE_STATEID:
4219 case -NFS4ERR_STALE_CLIENTID:
4220 nfs4_schedule_lease_recovery(clp);
4221 goto wait_on_recovery;
4222 #if defined(CONFIG_NFS_V4_1)
4223 case -NFS4ERR_BADSESSION:
4224 case -NFS4ERR_BADSLOT:
4225 case -NFS4ERR_BAD_HIGH_SLOT:
4226 case -NFS4ERR_DEADSESSION:
4227 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4228 case -NFS4ERR_SEQ_FALSE_RETRY:
4229 case -NFS4ERR_SEQ_MISORDERED:
4230 dprintk("%s ERROR %d, Reset session\n", __func__,
4232 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4233 goto wait_on_recovery;
4234 #endif /* CONFIG_NFS_V4_1 */
4235 case -NFS4ERR_DELAY:
4236 nfs_inc_server_stats(server, NFSIOS_DELAY);
4237 case -NFS4ERR_GRACE:
4238 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4239 task->tk_status = 0;
4241 case -NFS4ERR_RETRY_UNCACHED_REP:
4242 case -NFS4ERR_OLD_STATEID:
4243 task->tk_status = 0;
4246 task->tk_status = nfs4_map_errors(task->tk_status);
4249 task->tk_status = -EIO;
4252 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
4253 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4254 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4255 task->tk_status = 0;
4259 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4260 nfs4_verifier *bootverf)
4264 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4265 /* An impossible timestamp guarantees this value
4266 * will never match a generated boot time. */
4268 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4270 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4271 verf[0] = (__be32)nn->boot_time.tv_sec;
4272 verf[1] = (__be32)nn->boot_time.tv_nsec;
4274 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4278 nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4279 char *buf, size_t len)
4281 unsigned int result;
4284 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4286 rpc_peeraddr2str(clp->cl_rpcclient,
4288 rpc_peeraddr2str(clp->cl_rpcclient,
4289 RPC_DISPLAY_PROTO));
4295 nfs4_init_uniform_client_string(const struct nfs_client *clp,
4296 char *buf, size_t len)
4298 char *nodename = clp->cl_rpcclient->cl_nodename;
4300 if (nfs4_client_id_uniquifier[0] != '\0')
4301 nodename = nfs4_client_id_uniquifier;
4302 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4303 clp->rpc_ops->version, clp->cl_minorversion,
4308 * nfs4_proc_setclientid - Negotiate client ID
4309 * @clp: state data structure
4310 * @program: RPC program for NFSv4 callback service
4311 * @port: IP port number for NFS4 callback service
4312 * @cred: RPC credential to use for this call
4313 * @res: where to place the result
4315 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4317 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4318 unsigned short port, struct rpc_cred *cred,
4319 struct nfs4_setclientid_res *res)
4321 nfs4_verifier sc_verifier;
4322 struct nfs4_setclientid setclientid = {
4323 .sc_verifier = &sc_verifier,
4325 .sc_cb_ident = clp->cl_cb_ident,
4327 struct rpc_message msg = {
4328 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4329 .rpc_argp = &setclientid,
4335 /* nfs_client_id4 */
4336 nfs4_init_boot_verifier(clp, &sc_verifier);
4337 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4338 setclientid.sc_name_len =
4339 nfs4_init_uniform_client_string(clp,
4340 setclientid.sc_name,
4341 sizeof(setclientid.sc_name));
4343 setclientid.sc_name_len =
4344 nfs4_init_nonuniform_client_string(clp,
4345 setclientid.sc_name,
4346 sizeof(setclientid.sc_name));
4349 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
4350 sizeof(setclientid.sc_netid),
4351 rpc_peeraddr2str(clp->cl_rpcclient,
4352 RPC_DISPLAY_NETID));
4354 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
4355 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
4356 clp->cl_ipaddr, port >> 8, port & 255);
4358 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4359 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4360 setclientid.sc_name_len, setclientid.sc_name);
4361 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4362 dprintk("NFS reply setclientid: %d\n", status);
4367 * nfs4_proc_setclientid_confirm - Confirm client ID
4368 * @clp: state data structure
4369 * @res: result of a previous SETCLIENTID
4370 * @cred: RPC credential to use for this call
4372 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4374 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
4375 struct nfs4_setclientid_res *arg,
4376 struct rpc_cred *cred)
4378 struct rpc_message msg = {
4379 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
4385 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4386 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4388 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4389 dprintk("NFS reply setclientid_confirm: %d\n", status);
4393 struct nfs4_delegreturndata {
4394 struct nfs4_delegreturnargs args;
4395 struct nfs4_delegreturnres res;
4397 nfs4_stateid stateid;
4398 unsigned long timestamp;
4399 struct nfs_fattr fattr;
4403 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4405 struct nfs4_delegreturndata *data = calldata;
4407 if (!nfs4_sequence_done(task, &data->res.seq_res))
4410 switch (task->tk_status) {
4412 renew_lease(data->res.server, data->timestamp);
4414 case -NFS4ERR_ADMIN_REVOKED:
4415 case -NFS4ERR_DELEG_REVOKED:
4416 case -NFS4ERR_BAD_STATEID:
4417 case -NFS4ERR_OLD_STATEID:
4418 case -NFS4ERR_STALE_STATEID:
4419 case -NFS4ERR_EXPIRED:
4420 task->tk_status = 0;
4423 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4425 rpc_restart_call_prepare(task);
4429 data->rpc_status = task->tk_status;
4432 static void nfs4_delegreturn_release(void *calldata)
4437 #if defined(CONFIG_NFS_V4_1)
4438 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4440 struct nfs4_delegreturndata *d_data;
4442 d_data = (struct nfs4_delegreturndata *)data;
4444 nfs4_setup_sequence(d_data->res.server,
4445 &d_data->args.seq_args,
4446 &d_data->res.seq_res,
4449 #endif /* CONFIG_NFS_V4_1 */
4451 static const struct rpc_call_ops nfs4_delegreturn_ops = {
4452 #if defined(CONFIG_NFS_V4_1)
4453 .rpc_call_prepare = nfs4_delegreturn_prepare,
4454 #endif /* CONFIG_NFS_V4_1 */
4455 .rpc_call_done = nfs4_delegreturn_done,
4456 .rpc_release = nfs4_delegreturn_release,
4459 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4461 struct nfs4_delegreturndata *data;
4462 struct nfs_server *server = NFS_SERVER(inode);
4463 struct rpc_task *task;
4464 struct rpc_message msg = {
4465 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4468 struct rpc_task_setup task_setup_data = {
4469 .rpc_client = server->client,
4470 .rpc_message = &msg,
4471 .callback_ops = &nfs4_delegreturn_ops,
4472 .flags = RPC_TASK_ASYNC,
4476 data = kzalloc(sizeof(*data), GFP_NOFS);
4479 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4480 data->args.fhandle = &data->fh;
4481 data->args.stateid = &data->stateid;
4482 data->args.bitmask = server->cache_consistency_bitmask;
4483 nfs_copy_fh(&data->fh, NFS_FH(inode));
4484 nfs4_stateid_copy(&data->stateid, stateid);
4485 data->res.fattr = &data->fattr;
4486 data->res.server = server;
4487 nfs_fattr_init(data->res.fattr);
4488 data->timestamp = jiffies;
4489 data->rpc_status = 0;
4491 task_setup_data.callback_data = data;
4492 msg.rpc_argp = &data->args;
4493 msg.rpc_resp = &data->res;
4494 task = rpc_run_task(&task_setup_data);
4496 return PTR_ERR(task);
4499 status = nfs4_wait_for_completion_rpc_task(task);
4502 status = data->rpc_status;
4504 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4506 nfs_refresh_inode(inode, &data->fattr);
4512 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4514 struct nfs_server *server = NFS_SERVER(inode);
4515 struct nfs4_exception exception = { };
4518 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
4520 case -NFS4ERR_STALE_STATEID:
4521 case -NFS4ERR_EXPIRED:
4525 err = nfs4_handle_exception(server, err, &exception);
4526 } while (exception.retry);
4530 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4531 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4534 * sleep, with exponential backoff, and retry the LOCK operation.
4536 static unsigned long
4537 nfs4_set_lock_task_retry(unsigned long timeout)
4539 freezable_schedule_timeout_killable(timeout);
4541 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4542 return NFS4_LOCK_MAXTIMEOUT;
4546 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4548 struct inode *inode = state->inode;
4549 struct nfs_server *server = NFS_SERVER(inode);
4550 struct nfs_client *clp = server->nfs_client;
4551 struct nfs_lockt_args arg = {
4552 .fh = NFS_FH(inode),
4555 struct nfs_lockt_res res = {
4558 struct rpc_message msg = {
4559 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4562 .rpc_cred = state->owner->so_cred,
4564 struct nfs4_lock_state *lsp;
4567 arg.lock_owner.clientid = clp->cl_clientid;
4568 status = nfs4_set_lock_state(state, request);
4571 lsp = request->fl_u.nfs4_fl.owner;
4572 arg.lock_owner.id = lsp->ls_seqid.owner_id;
4573 arg.lock_owner.s_dev = server->s_dev;
4574 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4577 request->fl_type = F_UNLCK;
4579 case -NFS4ERR_DENIED:
4582 request->fl_ops->fl_release_private(request);
4583 request->fl_ops = NULL;
4588 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4590 struct nfs4_exception exception = { };
4594 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4595 _nfs4_proc_getlk(state, cmd, request),
4597 } while (exception.retry);
4601 static int do_vfs_lock(struct file *file, struct file_lock *fl)
4604 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4606 res = posix_lock_file_wait(file, fl);
4609 res = flock_lock_file_wait(file, fl);
4617 struct nfs4_unlockdata {
4618 struct nfs_locku_args arg;
4619 struct nfs_locku_res res;
4620 struct nfs4_lock_state *lsp;
4621 struct nfs_open_context *ctx;
4622 struct file_lock fl;
4623 const struct nfs_server *server;
4624 unsigned long timestamp;
4627 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4628 struct nfs_open_context *ctx,
4629 struct nfs4_lock_state *lsp,
4630 struct nfs_seqid *seqid)
4632 struct nfs4_unlockdata *p;
4633 struct inode *inode = lsp->ls_state->inode;
4635 p = kzalloc(sizeof(*p), GFP_NOFS);
4638 p->arg.fh = NFS_FH(inode);
4640 p->arg.seqid = seqid;
4641 p->res.seqid = seqid;
4642 p->arg.stateid = &lsp->ls_stateid;
4644 atomic_inc(&lsp->ls_count);
4645 /* Ensure we don't close file until we're done freeing locks! */
4646 p->ctx = get_nfs_open_context(ctx);
4647 memcpy(&p->fl, fl, sizeof(p->fl));
4648 p->server = NFS_SERVER(inode);
4652 static void nfs4_locku_release_calldata(void *data)
4654 struct nfs4_unlockdata *calldata = data;
4655 nfs_free_seqid(calldata->arg.seqid);
4656 nfs4_put_lock_state(calldata->lsp);
4657 put_nfs_open_context(calldata->ctx);
4661 static void nfs4_locku_done(struct rpc_task *task, void *data)
4663 struct nfs4_unlockdata *calldata = data;
4665 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4667 switch (task->tk_status) {
4669 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4670 &calldata->res.stateid);
4671 renew_lease(calldata->server, calldata->timestamp);
4673 case -NFS4ERR_BAD_STATEID:
4674 case -NFS4ERR_OLD_STATEID:
4675 case -NFS4ERR_STALE_STATEID:
4676 case -NFS4ERR_EXPIRED:
4679 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4680 rpc_restart_call_prepare(task);
4682 nfs_release_seqid(calldata->arg.seqid);
4685 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4687 struct nfs4_unlockdata *calldata = data;
4689 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4691 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
4692 /* Note: exit _without_ running nfs4_locku_done */
4695 calldata->timestamp = jiffies;
4696 if (nfs4_setup_sequence(calldata->server,
4697 &calldata->arg.seq_args,
4698 &calldata->res.seq_res,
4700 nfs_release_seqid(calldata->arg.seqid);
4703 task->tk_action = NULL;
4705 nfs4_sequence_done(task, &calldata->res.seq_res);
4708 static const struct rpc_call_ops nfs4_locku_ops = {
4709 .rpc_call_prepare = nfs4_locku_prepare,
4710 .rpc_call_done = nfs4_locku_done,
4711 .rpc_release = nfs4_locku_release_calldata,
4714 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4715 struct nfs_open_context *ctx,
4716 struct nfs4_lock_state *lsp,
4717 struct nfs_seqid *seqid)
4719 struct nfs4_unlockdata *data;
4720 struct rpc_message msg = {
4721 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4722 .rpc_cred = ctx->cred,
4724 struct rpc_task_setup task_setup_data = {
4725 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4726 .rpc_message = &msg,
4727 .callback_ops = &nfs4_locku_ops,
4728 .workqueue = nfsiod_workqueue,
4729 .flags = RPC_TASK_ASYNC,
4732 /* Ensure this is an unlock - when canceling a lock, the
4733 * canceled lock is passed in, and it won't be an unlock.
4735 fl->fl_type = F_UNLCK;
4737 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4739 nfs_free_seqid(seqid);
4740 return ERR_PTR(-ENOMEM);
4743 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4744 msg.rpc_argp = &data->arg;
4745 msg.rpc_resp = &data->res;
4746 task_setup_data.callback_data = data;
4747 return rpc_run_task(&task_setup_data);
4750 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4752 struct inode *inode = state->inode;
4753 struct nfs4_state_owner *sp = state->owner;
4754 struct nfs_inode *nfsi = NFS_I(inode);
4755 struct nfs_seqid *seqid;
4756 struct nfs4_lock_state *lsp;
4757 struct rpc_task *task;
4759 unsigned char fl_flags = request->fl_flags;
4761 status = nfs4_set_lock_state(state, request);
4762 /* Unlock _before_ we do the RPC call */
4763 request->fl_flags |= FL_EXISTS;
4764 /* Exclude nfs_delegation_claim_locks() */
4765 mutex_lock(&sp->so_delegreturn_mutex);
4766 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
4767 down_read(&nfsi->rwsem);
4768 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4769 up_read(&nfsi->rwsem);
4770 mutex_unlock(&sp->so_delegreturn_mutex);
4773 up_read(&nfsi->rwsem);
4774 mutex_unlock(&sp->so_delegreturn_mutex);
4777 /* Is this a delegated lock? */
4778 lsp = request->fl_u.nfs4_fl.owner;
4779 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
4781 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4785 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4786 status = PTR_ERR(task);
4789 status = nfs4_wait_for_completion_rpc_task(task);
4792 request->fl_flags = fl_flags;
4796 struct nfs4_lockdata {
4797 struct nfs_lock_args arg;
4798 struct nfs_lock_res res;
4799 struct nfs4_lock_state *lsp;
4800 struct nfs_open_context *ctx;
4801 struct file_lock fl;
4802 unsigned long timestamp;
4805 struct nfs_server *server;
4808 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4809 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4812 struct nfs4_lockdata *p;
4813 struct inode *inode = lsp->ls_state->inode;
4814 struct nfs_server *server = NFS_SERVER(inode);
4816 p = kzalloc(sizeof(*p), gfp_mask);
4820 p->arg.fh = NFS_FH(inode);
4822 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4823 if (p->arg.open_seqid == NULL)
4825 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4826 if (p->arg.lock_seqid == NULL)
4827 goto out_free_seqid;
4828 p->arg.lock_stateid = &lsp->ls_stateid;
4829 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4830 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
4831 p->arg.lock_owner.s_dev = server->s_dev;
4832 p->res.lock_seqid = p->arg.lock_seqid;
4835 atomic_inc(&lsp->ls_count);
4836 p->ctx = get_nfs_open_context(ctx);
4837 memcpy(&p->fl, fl, sizeof(p->fl));
4840 nfs_free_seqid(p->arg.open_seqid);
4846 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4848 struct nfs4_lockdata *data = calldata;
4849 struct nfs4_state *state = data->lsp->ls_state;
4851 dprintk("%s: begin!\n", __func__);
4852 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4854 /* Do we need to do an open_to_lock_owner? */
4855 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4856 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
4857 goto out_release_lock_seqid;
4859 data->arg.open_stateid = &state->open_stateid;
4860 data->arg.new_lock_owner = 1;
4861 data->res.open_seqid = data->arg.open_seqid;
4863 data->arg.new_lock_owner = 0;
4864 if (!nfs4_valid_open_stateid(state)) {
4865 data->rpc_status = -EBADF;
4866 task->tk_action = NULL;
4867 goto out_release_open_seqid;
4869 data->timestamp = jiffies;
4870 if (nfs4_setup_sequence(data->server,
4871 &data->arg.seq_args,
4875 out_release_open_seqid:
4876 nfs_release_seqid(data->arg.open_seqid);
4877 out_release_lock_seqid:
4878 nfs_release_seqid(data->arg.lock_seqid);
4880 nfs4_sequence_done(task, &data->res.seq_res);
4881 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4884 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4886 struct nfs4_lockdata *data = calldata;
4888 dprintk("%s: begin!\n", __func__);
4890 if (!nfs4_sequence_done(task, &data->res.seq_res))
4893 data->rpc_status = task->tk_status;
4894 if (data->arg.new_lock_owner != 0) {
4895 if (data->rpc_status == 0)
4896 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4900 if (data->rpc_status == 0) {
4901 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
4902 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
4903 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4906 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4909 static void nfs4_lock_release(void *calldata)
4911 struct nfs4_lockdata *data = calldata;
4913 dprintk("%s: begin!\n", __func__);
4914 nfs_free_seqid(data->arg.open_seqid);
4915 if (data->cancelled != 0) {
4916 struct rpc_task *task;
4917 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4918 data->arg.lock_seqid);
4920 rpc_put_task_async(task);
4921 dprintk("%s: cancelling lock!\n", __func__);
4923 nfs_free_seqid(data->arg.lock_seqid);
4924 nfs4_put_lock_state(data->lsp);
4925 put_nfs_open_context(data->ctx);
4927 dprintk("%s: done!\n", __func__);
4930 static const struct rpc_call_ops nfs4_lock_ops = {
4931 .rpc_call_prepare = nfs4_lock_prepare,
4932 .rpc_call_done = nfs4_lock_done,
4933 .rpc_release = nfs4_lock_release,
4936 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4939 case -NFS4ERR_ADMIN_REVOKED:
4940 case -NFS4ERR_BAD_STATEID:
4941 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4942 if (new_lock_owner != 0 ||
4943 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
4944 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4946 case -NFS4ERR_STALE_STATEID:
4947 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4948 case -NFS4ERR_EXPIRED:
4949 nfs4_schedule_lease_recovery(server->nfs_client);
4953 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4955 struct nfs4_lockdata *data;
4956 struct rpc_task *task;
4957 struct rpc_message msg = {
4958 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4959 .rpc_cred = state->owner->so_cred,
4961 struct rpc_task_setup task_setup_data = {
4962 .rpc_client = NFS_CLIENT(state->inode),
4963 .rpc_message = &msg,
4964 .callback_ops = &nfs4_lock_ops,
4965 .workqueue = nfsiod_workqueue,
4966 .flags = RPC_TASK_ASYNC,
4970 dprintk("%s: begin!\n", __func__);
4971 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4972 fl->fl_u.nfs4_fl.owner,
4973 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4977 data->arg.block = 1;
4978 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4979 msg.rpc_argp = &data->arg;
4980 msg.rpc_resp = &data->res;
4981 task_setup_data.callback_data = data;
4982 if (recovery_type > NFS_LOCK_NEW) {
4983 if (recovery_type == NFS_LOCK_RECLAIM)
4984 data->arg.reclaim = NFS_LOCK_RECLAIM;
4985 nfs4_set_sequence_privileged(&data->arg.seq_args);
4987 task = rpc_run_task(&task_setup_data);
4989 return PTR_ERR(task);
4990 ret = nfs4_wait_for_completion_rpc_task(task);
4992 ret = data->rpc_status;
4994 nfs4_handle_setlk_error(data->server, data->lsp,
4995 data->arg.new_lock_owner, ret);
4997 data->cancelled = 1;
4999 dprintk("%s: done, ret = %d!\n", __func__, ret);
5003 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5005 struct nfs_server *server = NFS_SERVER(state->inode);
5006 struct nfs4_exception exception = {
5007 .inode = state->inode,
5012 /* Cache the lock if possible... */
5013 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5015 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
5016 if (err != -NFS4ERR_DELAY)
5018 nfs4_handle_exception(server, err, &exception);
5019 } while (exception.retry);
5023 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5025 struct nfs_server *server = NFS_SERVER(state->inode);
5026 struct nfs4_exception exception = {
5027 .inode = state->inode,
5031 err = nfs4_set_lock_state(state, request);
5035 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5037 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
5041 case -NFS4ERR_GRACE:
5042 case -NFS4ERR_DELAY:
5043 nfs4_handle_exception(server, err, &exception);
5046 } while (exception.retry);
5051 #if defined(CONFIG_NFS_V4_1)
5053 * nfs41_check_expired_locks - possibly free a lock stateid
5055 * @state: NFSv4 state for an inode
5057 * Returns NFS_OK if recovery for this stateid is now finished.
5058 * Otherwise a negative NFS4ERR value is returned.
5060 static int nfs41_check_expired_locks(struct nfs4_state *state)
5062 int status, ret = -NFS4ERR_BAD_STATEID;
5063 struct nfs4_lock_state *lsp;
5064 struct nfs_server *server = NFS_SERVER(state->inode);
5066 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
5067 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
5068 status = nfs41_test_stateid(server, &lsp->ls_stateid);
5069 if (status != NFS_OK) {
5070 /* Free the stateid unless the server
5071 * informs us the stateid is unrecognized. */
5072 if (status != -NFS4ERR_BAD_STATEID)
5073 nfs41_free_stateid(server,
5075 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5084 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5086 int status = NFS_OK;
5088 if (test_bit(LK_STATE_IN_USE, &state->flags))
5089 status = nfs41_check_expired_locks(state);
5090 if (status != NFS_OK)
5091 status = nfs4_lock_expired(state, request);
5096 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5098 struct nfs4_state_owner *sp = state->owner;
5099 struct nfs_inode *nfsi = NFS_I(state->inode);
5100 unsigned char fl_flags = request->fl_flags;
5102 int status = -ENOLCK;
5104 if ((fl_flags & FL_POSIX) &&
5105 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5107 /* Is this a delegated open? */
5108 status = nfs4_set_lock_state(state, request);
5111 request->fl_flags |= FL_ACCESS;
5112 status = do_vfs_lock(request->fl_file, request);
5115 down_read(&nfsi->rwsem);
5116 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
5117 /* Yes: cache locks! */
5118 /* ...but avoid races with delegation recall... */
5119 request->fl_flags = fl_flags & ~FL_SLEEP;
5120 status = do_vfs_lock(request->fl_file, request);
5123 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5124 up_read(&nfsi->rwsem);
5125 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
5128 down_read(&nfsi->rwsem);
5129 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5130 status = -NFS4ERR_DELAY;
5133 /* Note: we always want to sleep here! */
5134 request->fl_flags = fl_flags | FL_SLEEP;
5135 if (do_vfs_lock(request->fl_file, request) < 0)
5136 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5137 "manager!\n", __func__);
5139 up_read(&nfsi->rwsem);
5141 request->fl_flags = fl_flags;
5145 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5147 struct nfs4_exception exception = {
5149 .inode = state->inode,
5154 err = _nfs4_proc_setlk(state, cmd, request);
5155 if (err == -NFS4ERR_DENIED)
5157 err = nfs4_handle_exception(NFS_SERVER(state->inode),
5159 } while (exception.retry);
5164 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5166 struct nfs_open_context *ctx;
5167 struct nfs4_state *state;
5168 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5171 /* verify open state */
5172 ctx = nfs_file_open_context(filp);
5175 if (request->fl_start < 0 || request->fl_end < 0)
5178 if (IS_GETLK(cmd)) {
5180 return nfs4_proc_getlk(state, F_GETLK, request);
5184 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5187 if (request->fl_type == F_UNLCK) {
5189 return nfs4_proc_unlck(state, cmd, request);
5196 * Don't rely on the VFS having checked the file open mode,
5197 * since it won't do this for flock() locks.
5199 switch (request->fl_type) {
5201 if (!(filp->f_mode & FMODE_READ))
5205 if (!(filp->f_mode & FMODE_WRITE))
5210 status = nfs4_proc_setlk(state, cmd, request);
5211 if ((status != -EAGAIN) || IS_SETLK(cmd))
5213 timeout = nfs4_set_lock_task_retry(timeout);
5214 status = -ERESTARTSYS;
5217 } while(status < 0);
5221 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
5223 struct nfs_server *server = NFS_SERVER(state->inode);
5226 err = nfs4_set_lock_state(state, fl);
5229 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
5230 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
5233 struct nfs_release_lockowner_data {
5234 struct nfs4_lock_state *lsp;
5235 struct nfs_server *server;
5236 struct nfs_release_lockowner_args args;
5239 static void nfs4_release_lockowner_release(void *calldata)
5241 struct nfs_release_lockowner_data *data = calldata;
5242 nfs4_free_lock_state(data->server, data->lsp);
5246 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
5247 .rpc_release = nfs4_release_lockowner_release,
5250 static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
5252 struct nfs_release_lockowner_data *data;
5253 struct rpc_message msg = {
5254 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5257 if (server->nfs_client->cl_mvops->minor_version != 0)
5259 data = kmalloc(sizeof(*data), GFP_NOFS);
5263 data->server = server;
5264 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5265 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5266 data->args.lock_owner.s_dev = server->s_dev;
5267 msg.rpc_argp = &data->args;
5268 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5272 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5274 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5275 const void *buf, size_t buflen,
5276 int flags, int type)
5278 if (strcmp(key, "") != 0)
5281 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
5284 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5285 void *buf, size_t buflen, int type)
5287 if (strcmp(key, "") != 0)
5290 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
5293 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5294 size_t list_len, const char *name,
5295 size_t name_len, int type)
5297 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
5299 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5302 if (list && len <= list_len)
5303 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
5308 * nfs_fhget will use either the mounted_on_fileid or the fileid
5310 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5312 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5313 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5314 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
5315 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
5318 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
5319 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
5320 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5324 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5325 const struct qstr *name,
5326 struct nfs4_fs_locations *fs_locations,
5329 struct nfs_server *server = NFS_SERVER(dir);
5331 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
5333 struct nfs4_fs_locations_arg args = {
5334 .dir_fh = NFS_FH(dir),
5339 struct nfs4_fs_locations_res res = {
5340 .fs_locations = fs_locations,
5342 struct rpc_message msg = {
5343 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5349 dprintk("%s: start\n", __func__);
5351 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5352 * is not supported */
5353 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5354 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5356 bitmask[0] |= FATTR4_WORD0_FILEID;
5358 nfs_fattr_init(&fs_locations->fattr);
5359 fs_locations->server = server;
5360 fs_locations->nlocations = 0;
5361 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
5362 dprintk("%s: returned status = %d\n", __func__, status);
5366 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5367 const struct qstr *name,
5368 struct nfs4_fs_locations *fs_locations,
5371 struct nfs4_exception exception = { };
5374 err = nfs4_handle_exception(NFS_SERVER(dir),
5375 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
5377 } while (exception.retry);
5381 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5384 struct nfs4_secinfo_arg args = {
5385 .dir_fh = NFS_FH(dir),
5388 struct nfs4_secinfo_res res = {
5391 struct rpc_message msg = {
5392 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5397 dprintk("NFS call secinfo %s\n", name->name);
5398 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5399 dprintk("NFS reply secinfo: %d\n", status);
5403 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5404 struct nfs4_secinfo_flavors *flavors)
5406 struct nfs4_exception exception = { };
5409 err = nfs4_handle_exception(NFS_SERVER(dir),
5410 _nfs4_proc_secinfo(dir, name, flavors),
5412 } while (exception.retry);
5416 #ifdef CONFIG_NFS_V4_1
5418 * Check the exchange flags returned by the server for invalid flags, having
5419 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5422 static int nfs4_check_cl_exchange_flags(u32 flags)
5424 if (flags & ~EXCHGID4_FLAG_MASK_R)
5426 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5427 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5429 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5433 return -NFS4ERR_INVAL;
5437 nfs41_same_server_scope(struct nfs41_server_scope *a,
5438 struct nfs41_server_scope *b)
5440 if (a->server_scope_sz == b->server_scope_sz &&
5441 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5448 * nfs4_proc_bind_conn_to_session()
5450 * The 4.1 client currently uses the same TCP connection for the
5451 * fore and backchannel.
5453 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
5456 struct nfs41_bind_conn_to_session_res res;
5457 struct rpc_message msg = {
5459 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5465 dprintk("--> %s\n", __func__);
5467 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5468 if (unlikely(res.session == NULL)) {
5473 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5475 if (memcmp(res.session->sess_id.data,
5476 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5477 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5481 if (res.dir != NFS4_CDFS4_BOTH) {
5482 dprintk("NFS: %s: Unexpected direction from server\n",
5487 if (res.use_conn_in_rdma_mode) {
5488 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5497 dprintk("<-- %s status= %d\n", __func__, status);
5502 * nfs4_proc_exchange_id()
5504 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5506 * Since the clientid has expired, all compounds using sessions
5507 * associated with the stale clientid will be returning
5508 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5509 * be in some phase of session reset.
5511 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
5513 nfs4_verifier verifier;
5514 struct nfs41_exchange_id_args args = {
5515 .verifier = &verifier,
5517 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
5519 struct nfs41_exchange_id_res res = {
5523 struct rpc_message msg = {
5524 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5530 nfs4_init_boot_verifier(clp, &verifier);
5531 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5533 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5534 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5535 args.id_len, args.id);
5537 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
5539 if (unlikely(res.server_owner == NULL)) {
5544 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
5546 if (unlikely(res.server_scope == NULL)) {
5548 goto out_server_owner;
5551 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
5552 if (unlikely(res.impl_id == NULL)) {
5554 goto out_server_scope;
5557 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5559 status = nfs4_check_cl_exchange_flags(res.flags);
5562 clp->cl_clientid = res.clientid;
5563 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5564 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5565 clp->cl_seqid = res.seqid;
5567 kfree(clp->cl_serverowner);
5568 clp->cl_serverowner = res.server_owner;
5569 res.server_owner = NULL;
5571 /* use the most recent implementation id */
5572 kfree(clp->cl_implid);
5573 clp->cl_implid = res.impl_id;
5575 if (clp->cl_serverscope != NULL &&
5576 !nfs41_same_server_scope(clp->cl_serverscope,
5577 res.server_scope)) {
5578 dprintk("%s: server_scope mismatch detected\n",
5580 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
5581 kfree(clp->cl_serverscope);
5582 clp->cl_serverscope = NULL;
5585 if (clp->cl_serverscope == NULL) {
5586 clp->cl_serverscope = res.server_scope;
5593 kfree(res.server_owner);
5595 kfree(res.server_scope);
5597 if (clp->cl_implid != NULL)
5598 dprintk("NFS reply exchange_id: Server Implementation ID: "
5599 "domain: %s, name: %s, date: %llu,%u\n",
5600 clp->cl_implid->domain, clp->cl_implid->name,
5601 clp->cl_implid->date.seconds,
5602 clp->cl_implid->date.nseconds);
5603 dprintk("NFS reply exchange_id: %d\n", status);
5607 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5608 struct rpc_cred *cred)
5610 struct rpc_message msg = {
5611 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5617 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5619 dprintk("NFS: Got error %d from the server %s on "
5620 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5624 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5625 struct rpc_cred *cred)
5630 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5631 ret = _nfs4_proc_destroy_clientid(clp, cred);
5633 case -NFS4ERR_DELAY:
5634 case -NFS4ERR_CLIENTID_BUSY:
5644 int nfs4_destroy_clientid(struct nfs_client *clp)
5646 struct rpc_cred *cred;
5649 if (clp->cl_mvops->minor_version < 1)
5651 if (clp->cl_exchange_flags == 0)
5653 if (clp->cl_preserve_clid)
5655 cred = nfs4_get_exchange_id_cred(clp);
5656 ret = nfs4_proc_destroy_clientid(clp, cred);
5661 case -NFS4ERR_STALE_CLIENTID:
5662 clp->cl_exchange_flags = 0;
5668 struct nfs4_get_lease_time_data {
5669 struct nfs4_get_lease_time_args *args;
5670 struct nfs4_get_lease_time_res *res;
5671 struct nfs_client *clp;
5674 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5677 struct nfs4_get_lease_time_data *data =
5678 (struct nfs4_get_lease_time_data *)calldata;
5680 dprintk("--> %s\n", __func__);
5681 /* just setup sequence, do not trigger session recovery
5682 since we're invoked within one */
5683 nfs41_setup_sequence(data->clp->cl_session,
5684 &data->args->la_seq_args,
5685 &data->res->lr_seq_res,
5687 dprintk("<-- %s\n", __func__);
5691 * Called from nfs4_state_manager thread for session setup, so don't recover
5692 * from sequence operation or clientid errors.
5694 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5696 struct nfs4_get_lease_time_data *data =
5697 (struct nfs4_get_lease_time_data *)calldata;
5699 dprintk("--> %s\n", __func__);
5700 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5702 switch (task->tk_status) {
5703 case -NFS4ERR_DELAY:
5704 case -NFS4ERR_GRACE:
5705 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5706 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5707 task->tk_status = 0;
5709 case -NFS4ERR_RETRY_UNCACHED_REP:
5710 rpc_restart_call_prepare(task);
5713 dprintk("<-- %s\n", __func__);
5716 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
5717 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5718 .rpc_call_done = nfs4_get_lease_time_done,
5721 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5723 struct rpc_task *task;
5724 struct nfs4_get_lease_time_args args;
5725 struct nfs4_get_lease_time_res res = {
5726 .lr_fsinfo = fsinfo,
5728 struct nfs4_get_lease_time_data data = {
5733 struct rpc_message msg = {
5734 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5738 struct rpc_task_setup task_setup = {
5739 .rpc_client = clp->cl_rpcclient,
5740 .rpc_message = &msg,
5741 .callback_ops = &nfs4_get_lease_time_ops,
5742 .callback_data = &data,
5743 .flags = RPC_TASK_TIMEOUT,
5747 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
5748 nfs4_set_sequence_privileged(&args.la_seq_args);
5749 dprintk("--> %s\n", __func__);
5750 task = rpc_run_task(&task_setup);
5753 status = PTR_ERR(task);
5755 status = task->tk_status;
5758 dprintk("<-- %s return %d\n", __func__, status);
5764 * Initialize the values to be used by the client in CREATE_SESSION
5765 * If nfs4_init_session set the fore channel request and response sizes,
5768 * Set the back channel max_resp_sz_cached to zero to force the client to
5769 * always set csa_cachethis to FALSE because the current implementation
5770 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5772 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5774 struct nfs4_session *session = args->client->cl_session;
5775 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5776 mxresp_sz = session->fc_target_max_resp_sz;
5779 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5781 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5782 /* Fore channel attributes */
5783 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5784 args->fc_attrs.max_resp_sz = mxresp_sz;
5785 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5786 args->fc_attrs.max_reqs = max_session_slots;
5788 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5789 "max_ops=%u max_reqs=%u\n",
5791 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5792 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5794 /* Back channel attributes */
5795 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5796 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5797 args->bc_attrs.max_resp_sz_cached = 0;
5798 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5799 args->bc_attrs.max_reqs = 1;
5801 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5802 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5804 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5805 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5806 args->bc_attrs.max_reqs);
5809 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5811 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5812 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5814 if (rcvd->max_resp_sz > sent->max_resp_sz)
5817 * Our requested max_ops is the minimum we need; we're not
5818 * prepared to break up compounds into smaller pieces than that.
5819 * So, no point even trying to continue if the server won't
5822 if (rcvd->max_ops < sent->max_ops)
5824 if (rcvd->max_reqs == 0)
5826 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5827 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
5831 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5833 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5834 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5836 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5838 if (rcvd->max_resp_sz < sent->max_resp_sz)
5840 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5842 /* These would render the backchannel useless: */
5843 if (rcvd->max_ops != sent->max_ops)
5845 if (rcvd->max_reqs != sent->max_reqs)
5850 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5851 struct nfs4_session *session)
5855 ret = nfs4_verify_fore_channel_attrs(args, session);
5858 return nfs4_verify_back_channel_attrs(args, session);
5861 static int _nfs4_proc_create_session(struct nfs_client *clp,
5862 struct rpc_cred *cred)
5864 struct nfs4_session *session = clp->cl_session;
5865 struct nfs41_create_session_args args = {
5867 .cb_program = NFS4_CALLBACK,
5869 struct nfs41_create_session_res res = {
5872 struct rpc_message msg = {
5873 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5880 nfs4_init_channel_attrs(&args);
5881 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5883 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5886 /* Verify the session's negotiated channel_attrs values */
5887 status = nfs4_verify_channel_attrs(&args, session);
5888 /* Increment the clientid slot sequence id */
5896 * Issues a CREATE_SESSION operation to the server.
5897 * It is the responsibility of the caller to verify the session is
5898 * expired before calling this routine.
5900 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
5904 struct nfs4_session *session = clp->cl_session;
5906 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5908 status = _nfs4_proc_create_session(clp, cred);
5912 /* Init or reset the session slot tables */
5913 status = nfs4_setup_session_slot_tables(session);
5914 dprintk("slot table setup returned %d\n", status);
5918 ptr = (unsigned *)&session->sess_id.data[0];
5919 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5920 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5922 dprintk("<-- %s\n", __func__);
5927 * Issue the over-the-wire RPC DESTROY_SESSION.
5928 * The caller must serialize access to this routine.
5930 int nfs4_proc_destroy_session(struct nfs4_session *session,
5931 struct rpc_cred *cred)
5933 struct rpc_message msg = {
5934 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5935 .rpc_argp = session,
5940 dprintk("--> nfs4_proc_destroy_session\n");
5942 /* session is still being setup */
5943 if (session->clp->cl_cons_state != NFS_CS_READY)
5946 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5949 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
5950 "Session has been destroyed regardless...\n", status);
5952 dprintk("<-- nfs4_proc_destroy_session\n");
5957 * Renew the cl_session lease.
5959 struct nfs4_sequence_data {
5960 struct nfs_client *clp;
5961 struct nfs4_sequence_args args;
5962 struct nfs4_sequence_res res;
5965 static void nfs41_sequence_release(void *data)
5967 struct nfs4_sequence_data *calldata = data;
5968 struct nfs_client *clp = calldata->clp;
5970 if (atomic_read(&clp->cl_count) > 1)
5971 nfs4_schedule_state_renewal(clp);
5972 nfs_put_client(clp);
5976 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5978 switch(task->tk_status) {
5979 case -NFS4ERR_DELAY:
5980 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5983 nfs4_schedule_lease_recovery(clp);
5988 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5990 struct nfs4_sequence_data *calldata = data;
5991 struct nfs_client *clp = calldata->clp;
5993 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5996 if (task->tk_status < 0) {
5997 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5998 if (atomic_read(&clp->cl_count) == 1)
6001 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
6002 rpc_restart_call_prepare(task);
6006 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
6008 dprintk("<-- %s\n", __func__);
6011 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6013 struct nfs4_sequence_data *calldata = data;
6014 struct nfs_client *clp = calldata->clp;
6015 struct nfs4_sequence_args *args;
6016 struct nfs4_sequence_res *res;
6018 args = task->tk_msg.rpc_argp;
6019 res = task->tk_msg.rpc_resp;
6021 nfs41_setup_sequence(clp->cl_session, args, res, task);
6024 static const struct rpc_call_ops nfs41_sequence_ops = {
6025 .rpc_call_done = nfs41_sequence_call_done,
6026 .rpc_call_prepare = nfs41_sequence_prepare,
6027 .rpc_release = nfs41_sequence_release,
6030 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
6031 struct rpc_cred *cred,
6034 struct nfs4_sequence_data *calldata;
6035 struct rpc_message msg = {
6036 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6039 struct rpc_task_setup task_setup_data = {
6040 .rpc_client = clp->cl_rpcclient,
6041 .rpc_message = &msg,
6042 .callback_ops = &nfs41_sequence_ops,
6043 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
6046 if (!atomic_inc_not_zero(&clp->cl_count))
6047 return ERR_PTR(-EIO);
6048 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
6049 if (calldata == NULL) {
6050 nfs_put_client(clp);
6051 return ERR_PTR(-ENOMEM);
6053 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
6055 nfs4_set_sequence_privileged(&calldata->args);
6056 msg.rpc_argp = &calldata->args;
6057 msg.rpc_resp = &calldata->res;
6058 calldata->clp = clp;
6059 task_setup_data.callback_data = calldata;
6061 return rpc_run_task(&task_setup_data);
6064 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
6066 struct rpc_task *task;
6069 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6071 task = _nfs41_proc_sequence(clp, cred, false);
6073 ret = PTR_ERR(task);
6075 rpc_put_task_async(task);
6076 dprintk("<-- %s status=%d\n", __func__, ret);
6080 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6082 struct rpc_task *task;
6085 task = _nfs41_proc_sequence(clp, cred, true);
6087 ret = PTR_ERR(task);
6090 ret = rpc_wait_for_completion_task(task);
6092 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6094 if (task->tk_status == 0)
6095 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
6096 ret = task->tk_status;
6100 dprintk("<-- %s status=%d\n", __func__, ret);
6104 struct nfs4_reclaim_complete_data {
6105 struct nfs_client *clp;
6106 struct nfs41_reclaim_complete_args arg;
6107 struct nfs41_reclaim_complete_res res;
6110 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6112 struct nfs4_reclaim_complete_data *calldata = data;
6114 nfs41_setup_sequence(calldata->clp->cl_session,
6115 &calldata->arg.seq_args,
6116 &calldata->res.seq_res,
6120 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6122 switch(task->tk_status) {
6124 case -NFS4ERR_COMPLETE_ALREADY:
6125 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6127 case -NFS4ERR_DELAY:
6128 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6130 case -NFS4ERR_RETRY_UNCACHED_REP:
6133 nfs4_schedule_lease_recovery(clp);
6138 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6140 struct nfs4_reclaim_complete_data *calldata = data;
6141 struct nfs_client *clp = calldata->clp;
6142 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6144 dprintk("--> %s\n", __func__);
6145 if (!nfs41_sequence_done(task, res))
6148 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6149 rpc_restart_call_prepare(task);
6152 dprintk("<-- %s\n", __func__);
6155 static void nfs4_free_reclaim_complete_data(void *data)
6157 struct nfs4_reclaim_complete_data *calldata = data;
6162 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6163 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6164 .rpc_call_done = nfs4_reclaim_complete_done,
6165 .rpc_release = nfs4_free_reclaim_complete_data,
6169 * Issue a global reclaim complete.
6171 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6173 struct nfs4_reclaim_complete_data *calldata;
6174 struct rpc_task *task;
6175 struct rpc_message msg = {
6176 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6178 struct rpc_task_setup task_setup_data = {
6179 .rpc_client = clp->cl_rpcclient,
6180 .rpc_message = &msg,
6181 .callback_ops = &nfs4_reclaim_complete_call_ops,
6182 .flags = RPC_TASK_ASYNC,
6184 int status = -ENOMEM;
6186 dprintk("--> %s\n", __func__);
6187 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
6188 if (calldata == NULL)
6190 calldata->clp = clp;
6191 calldata->arg.one_fs = 0;
6193 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
6194 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
6195 msg.rpc_argp = &calldata->arg;
6196 msg.rpc_resp = &calldata->res;
6197 task_setup_data.callback_data = calldata;
6198 task = rpc_run_task(&task_setup_data);
6200 status = PTR_ERR(task);
6203 status = nfs4_wait_for_completion_rpc_task(task);
6205 status = task->tk_status;
6209 dprintk("<-- %s status=%d\n", __func__, status);
6214 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6216 struct nfs4_layoutget *lgp = calldata;
6217 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6218 struct nfs4_session *session = nfs4_get_session(server);
6220 dprintk("--> %s\n", __func__);
6221 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6222 * right now covering the LAYOUTGET we are about to send.
6223 * However, that is not so catastrophic, and there seems
6224 * to be no way to prevent it completely.
6226 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
6227 &lgp->res.seq_res, task))
6229 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6230 NFS_I(lgp->args.inode)->layout,
6231 lgp->args.ctx->state)) {
6232 rpc_exit(task, NFS4_OK);
6236 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6238 struct nfs4_layoutget *lgp = calldata;
6239 struct inode *inode = lgp->args.inode;
6240 struct nfs_server *server = NFS_SERVER(inode);
6241 struct pnfs_layout_hdr *lo;
6242 struct nfs4_state *state = NULL;
6243 unsigned long timeo, now, giveup;
6245 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
6247 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
6250 switch (task->tk_status) {
6254 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
6255 * (or clients) writing to the same RAID stripe
6257 case -NFS4ERR_LAYOUTTRYLATER:
6259 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
6260 * existing layout before getting a new one).
6262 case -NFS4ERR_RECALLCONFLICT:
6263 timeo = rpc_get_timeout(task->tk_client);
6264 giveup = lgp->args.timestamp + timeo;
6266 if (time_after(giveup, now)) {
6267 unsigned long delay;
6270 * - Not less then NFS4_POLL_RETRY_MIN.
6271 * - One last time a jiffie before we give up
6272 * - exponential backoff (time_now minus start_attempt)
6274 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
6275 min((giveup - now - 1),
6276 now - lgp->args.timestamp));
6278 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
6280 rpc_delay(task, delay);
6281 task->tk_status = 0;
6282 rpc_restart_call_prepare(task);
6283 goto out; /* Do not call nfs4_async_handle_error() */
6286 case -NFS4ERR_EXPIRED:
6287 case -NFS4ERR_BAD_STATEID:
6288 spin_lock(&inode->i_lock);
6289 lo = NFS_I(inode)->layout;
6290 if (!lo || list_empty(&lo->plh_segs)) {
6291 spin_unlock(&inode->i_lock);
6292 /* If the open stateid was bad, then recover it. */
6293 state = lgp->args.ctx->state;
6297 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6298 spin_unlock(&inode->i_lock);
6299 /* Mark the bad layout state as invalid, then
6300 * retry using the open stateid. */
6301 pnfs_free_lseg_list(&head);
6304 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6305 rpc_restart_call_prepare(task);
6307 dprintk("<-- %s\n", __func__);
6310 static size_t max_response_pages(struct nfs_server *server)
6312 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6313 return nfs_page_array_len(0, max_resp_sz);
6316 static void nfs4_free_pages(struct page **pages, size_t size)
6323 for (i = 0; i < size; i++) {
6326 __free_page(pages[i]);
6331 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6333 struct page **pages;
6336 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6338 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6342 for (i = 0; i < size; i++) {
6343 pages[i] = alloc_page(gfp_flags);
6345 dprintk("%s: failed to allocate page\n", __func__);
6346 nfs4_free_pages(pages, size);
6354 static void nfs4_layoutget_release(void *calldata)
6356 struct nfs4_layoutget *lgp = calldata;
6357 struct inode *inode = lgp->args.inode;
6358 struct nfs_server *server = NFS_SERVER(inode);
6359 size_t max_pages = max_response_pages(server);
6361 dprintk("--> %s\n", __func__);
6362 nfs4_free_pages(lgp->args.layout.pages, max_pages);
6363 pnfs_put_layout_hdr(NFS_I(inode)->layout);
6364 put_nfs_open_context(lgp->args.ctx);
6366 dprintk("<-- %s\n", __func__);
6369 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6370 .rpc_call_prepare = nfs4_layoutget_prepare,
6371 .rpc_call_done = nfs4_layoutget_done,
6372 .rpc_release = nfs4_layoutget_release,
6375 struct pnfs_layout_segment *
6376 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
6378 struct inode *inode = lgp->args.inode;
6379 struct nfs_server *server = NFS_SERVER(inode);
6380 size_t max_pages = max_response_pages(server);
6381 struct rpc_task *task;
6382 struct rpc_message msg = {
6383 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6384 .rpc_argp = &lgp->args,
6385 .rpc_resp = &lgp->res,
6387 struct rpc_task_setup task_setup_data = {
6388 .rpc_client = server->client,
6389 .rpc_message = &msg,
6390 .callback_ops = &nfs4_layoutget_call_ops,
6391 .callback_data = lgp,
6392 .flags = RPC_TASK_ASYNC,
6394 struct pnfs_layout_segment *lseg = NULL;
6397 dprintk("--> %s\n", __func__);
6399 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6400 if (!lgp->args.layout.pages) {
6401 nfs4_layoutget_release(lgp);
6402 return ERR_PTR(-ENOMEM);
6404 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
6405 lgp->args.timestamp = jiffies;
6407 lgp->res.layoutp = &lgp->args.layout;
6408 lgp->res.seq_res.sr_slot = NULL;
6409 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
6411 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6412 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6414 task = rpc_run_task(&task_setup_data);
6416 return ERR_CAST(task);
6417 status = nfs4_wait_for_completion_rpc_task(task);
6419 status = task->tk_status;
6420 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6421 if (status == 0 && lgp->res.layoutp->len)
6422 lseg = pnfs_layout_process(lgp);
6424 dprintk("<-- %s status=%d\n", __func__, status);
6426 return ERR_PTR(status);
6431 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6433 struct nfs4_layoutreturn *lrp = calldata;
6435 dprintk("--> %s\n", __func__);
6436 nfs41_setup_sequence(lrp->clp->cl_session,
6437 &lrp->args.seq_args,
6442 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6444 struct nfs4_layoutreturn *lrp = calldata;
6445 struct nfs_server *server;
6447 dprintk("--> %s\n", __func__);
6449 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
6452 server = NFS_SERVER(lrp->args.inode);
6453 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6454 rpc_restart_call_prepare(task);
6457 dprintk("<-- %s\n", __func__);
6460 static void nfs4_layoutreturn_release(void *calldata)
6462 struct nfs4_layoutreturn *lrp = calldata;
6463 struct pnfs_layout_hdr *lo = lrp->args.layout;
6465 dprintk("--> %s\n", __func__);
6466 spin_lock(&lo->plh_inode->i_lock);
6467 if (lrp->res.lrs_present)
6468 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6469 lo->plh_block_lgets--;
6470 spin_unlock(&lo->plh_inode->i_lock);
6471 pnfs_put_layout_hdr(lrp->args.layout);
6473 dprintk("<-- %s\n", __func__);
6476 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6477 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6478 .rpc_call_done = nfs4_layoutreturn_done,
6479 .rpc_release = nfs4_layoutreturn_release,
6482 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6484 struct rpc_task *task;
6485 struct rpc_message msg = {
6486 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6487 .rpc_argp = &lrp->args,
6488 .rpc_resp = &lrp->res,
6490 struct rpc_task_setup task_setup_data = {
6491 .rpc_client = lrp->clp->cl_rpcclient,
6492 .rpc_message = &msg,
6493 .callback_ops = &nfs4_layoutreturn_call_ops,
6494 .callback_data = lrp,
6498 dprintk("--> %s\n", __func__);
6499 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
6500 task = rpc_run_task(&task_setup_data);
6502 return PTR_ERR(task);
6503 status = task->tk_status;
6504 dprintk("<-- %s status=%d\n", __func__, status);
6510 * Retrieve the list of Data Server devices from the MDS.
6512 static int _nfs4_getdevicelist(struct nfs_server *server,
6513 const struct nfs_fh *fh,
6514 struct pnfs_devicelist *devlist)
6516 struct nfs4_getdevicelist_args args = {
6518 .layoutclass = server->pnfs_curr_ld->id,
6520 struct nfs4_getdevicelist_res res = {
6523 struct rpc_message msg = {
6524 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6530 dprintk("--> %s\n", __func__);
6531 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6533 dprintk("<-- %s status=%d\n", __func__, status);
6537 int nfs4_proc_getdevicelist(struct nfs_server *server,
6538 const struct nfs_fh *fh,
6539 struct pnfs_devicelist *devlist)
6541 struct nfs4_exception exception = { };
6545 err = nfs4_handle_exception(server,
6546 _nfs4_getdevicelist(server, fh, devlist),
6548 } while (exception.retry);
6550 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6551 err, devlist->num_devs);
6555 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6558 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6560 struct nfs4_getdeviceinfo_args args = {
6563 struct nfs4_getdeviceinfo_res res = {
6566 struct rpc_message msg = {
6567 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6573 dprintk("--> %s\n", __func__);
6574 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6575 dprintk("<-- %s status=%d\n", __func__, status);
6580 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6582 struct nfs4_exception exception = { };
6586 err = nfs4_handle_exception(server,
6587 _nfs4_proc_getdeviceinfo(server, pdev),
6589 } while (exception.retry);
6592 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6594 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6596 struct nfs4_layoutcommit_data *data = calldata;
6597 struct nfs_server *server = NFS_SERVER(data->args.inode);
6598 struct nfs4_session *session = nfs4_get_session(server);
6600 nfs41_setup_sequence(session,
6601 &data->args.seq_args,
6607 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6609 struct nfs4_layoutcommit_data *data = calldata;
6610 struct nfs_server *server = NFS_SERVER(data->args.inode);
6612 if (!nfs41_sequence_done(task, &data->res.seq_res))
6615 switch (task->tk_status) { /* Just ignore these failures */
6616 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6617 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6618 case -NFS4ERR_BADLAYOUT: /* no layout */
6619 case -NFS4ERR_GRACE: /* loca_recalim always false */
6620 task->tk_status = 0;
6623 nfs_post_op_update_inode_force_wcc(data->args.inode,
6627 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6628 rpc_restart_call_prepare(task);
6634 static void nfs4_layoutcommit_release(void *calldata)
6636 struct nfs4_layoutcommit_data *data = calldata;
6638 pnfs_cleanup_layoutcommit(data);
6639 put_rpccred(data->cred);
6643 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6644 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6645 .rpc_call_done = nfs4_layoutcommit_done,
6646 .rpc_release = nfs4_layoutcommit_release,
6650 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
6652 struct rpc_message msg = {
6653 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6654 .rpc_argp = &data->args,
6655 .rpc_resp = &data->res,
6656 .rpc_cred = data->cred,
6658 struct rpc_task_setup task_setup_data = {
6659 .task = &data->task,
6660 .rpc_client = NFS_CLIENT(data->args.inode),
6661 .rpc_message = &msg,
6662 .callback_ops = &nfs4_layoutcommit_ops,
6663 .callback_data = data,
6664 .flags = RPC_TASK_ASYNC,
6666 struct rpc_task *task;
6669 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6670 "lbw: %llu inode %lu\n",
6671 data->task.tk_pid, sync,
6672 data->args.lastbytewritten,
6673 data->args.inode->i_ino);
6675 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
6676 task = rpc_run_task(&task_setup_data);
6678 return PTR_ERR(task);
6681 status = nfs4_wait_for_completion_rpc_task(task);
6684 status = task->tk_status;
6686 dprintk("%s: status %d\n", __func__, status);
6692 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6693 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6695 struct nfs41_secinfo_no_name_args args = {
6696 .style = SECINFO_STYLE_CURRENT_FH,
6698 struct nfs4_secinfo_res res = {
6701 struct rpc_message msg = {
6702 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6706 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6710 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6711 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6713 struct nfs4_exception exception = { };
6716 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6719 case -NFS4ERR_WRONGSEC:
6723 err = nfs4_handle_exception(server, err, &exception);
6725 } while (exception.retry);
6731 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6732 struct nfs_fsinfo *info)
6736 rpc_authflavor_t flavor;
6737 struct nfs4_secinfo_flavors *flavors;
6739 page = alloc_page(GFP_KERNEL);
6745 flavors = page_address(page);
6746 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6749 * Fall back on "guess and check" method if
6750 * the server doesn't support SECINFO_NO_NAME
6752 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
6753 err = nfs4_find_root_sec(server, fhandle, info);
6759 flavor = nfs_find_best_sec(flavors);
6761 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6771 static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6774 struct nfs41_test_stateid_args args = {
6777 struct nfs41_test_stateid_res res;
6778 struct rpc_message msg = {
6779 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6784 dprintk("NFS call test_stateid %p\n", stateid);
6785 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6786 nfs4_set_sequence_privileged(&args.seq_args);
6787 status = nfs4_call_sync_sequence(server->client, server, &msg,
6788 &args.seq_args, &res.seq_res);
6789 if (status != NFS_OK) {
6790 dprintk("NFS reply test_stateid: failed, %d\n", status);
6793 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
6798 * nfs41_test_stateid - perform a TEST_STATEID operation
6800 * @server: server / transport on which to perform the operation
6801 * @stateid: state ID to test
6803 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6804 * Otherwise a negative NFS4ERR value is returned if the operation
6805 * failed or the state ID is not currently valid.
6807 static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6809 struct nfs4_exception exception = { };
6812 err = _nfs41_test_stateid(server, stateid);
6813 if (err != -NFS4ERR_DELAY)
6815 nfs4_handle_exception(server, err, &exception);
6816 } while (exception.retry);
6820 struct nfs_free_stateid_data {
6821 struct nfs_server *server;
6822 struct nfs41_free_stateid_args args;
6823 struct nfs41_free_stateid_res res;
6826 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
6828 struct nfs_free_stateid_data *data = calldata;
6829 nfs41_setup_sequence(nfs4_get_session(data->server),
6830 &data->args.seq_args,
6835 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
6837 struct nfs_free_stateid_data *data = calldata;
6839 nfs41_sequence_done(task, &data->res.seq_res);
6841 switch (task->tk_status) {
6842 case -NFS4ERR_DELAY:
6843 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
6844 rpc_restart_call_prepare(task);
6848 static void nfs41_free_stateid_release(void *calldata)
6853 const struct rpc_call_ops nfs41_free_stateid_ops = {
6854 .rpc_call_prepare = nfs41_free_stateid_prepare,
6855 .rpc_call_done = nfs41_free_stateid_done,
6856 .rpc_release = nfs41_free_stateid_release,
6859 static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
6860 nfs4_stateid *stateid,
6863 struct rpc_message msg = {
6864 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6866 struct rpc_task_setup task_setup = {
6867 .rpc_client = server->client,
6868 .rpc_message = &msg,
6869 .callback_ops = &nfs41_free_stateid_ops,
6870 .flags = RPC_TASK_ASYNC,
6872 struct nfs_free_stateid_data *data;
6874 dprintk("NFS call free_stateid %p\n", stateid);
6875 data = kmalloc(sizeof(*data), GFP_NOFS);
6877 return ERR_PTR(-ENOMEM);
6878 data->server = server;
6879 nfs4_stateid_copy(&data->args.stateid, stateid);
6881 task_setup.callback_data = data;
6883 msg.rpc_argp = &data->args;
6884 msg.rpc_resp = &data->res;
6885 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
6887 nfs4_set_sequence_privileged(&data->args.seq_args);
6889 return rpc_run_task(&task_setup);
6893 * nfs41_free_stateid - perform a FREE_STATEID operation
6895 * @server: server / transport on which to perform the operation
6896 * @stateid: state ID to release
6898 * Returns NFS_OK if the server freed "stateid". Otherwise a
6899 * negative NFS4ERR value is returned.
6901 static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6903 struct rpc_task *task;
6906 task = _nfs41_free_stateid(server, stateid, true);
6908 return PTR_ERR(task);
6909 ret = rpc_wait_for_completion_task(task);
6911 ret = task->tk_status;
6916 static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
6918 struct rpc_task *task;
6920 task = _nfs41_free_stateid(server, &lsp->ls_stateid, false);
6921 nfs4_free_lock_state(server, lsp);
6923 return PTR_ERR(task);
6928 static bool nfs41_match_stateid(const nfs4_stateid *s1,
6929 const nfs4_stateid *s2)
6931 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
6934 if (s1->seqid == s2->seqid)
6936 if (s1->seqid == 0 || s2->seqid == 0)
6942 #endif /* CONFIG_NFS_V4_1 */
6944 static bool nfs4_match_stateid(const nfs4_stateid *s1,
6945 const nfs4_stateid *s2)
6947 return nfs4_stateid_match(s1, s2);
6951 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
6952 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6953 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6954 .recover_open = nfs4_open_reclaim,
6955 .recover_lock = nfs4_lock_reclaim,
6956 .establish_clid = nfs4_init_clientid,
6957 .get_clid_cred = nfs4_get_setclientid_cred,
6958 .detect_trunking = nfs40_discover_server_trunking,
6961 #if defined(CONFIG_NFS_V4_1)
6962 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6963 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6964 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6965 .recover_open = nfs4_open_reclaim,
6966 .recover_lock = nfs4_lock_reclaim,
6967 .establish_clid = nfs41_init_clientid,
6968 .get_clid_cred = nfs4_get_exchange_id_cred,
6969 .reclaim_complete = nfs41_proc_reclaim_complete,
6970 .detect_trunking = nfs41_discover_server_trunking,
6972 #endif /* CONFIG_NFS_V4_1 */
6974 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6975 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6976 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6977 .recover_open = nfs4_open_expired,
6978 .recover_lock = nfs4_lock_expired,
6979 .establish_clid = nfs4_init_clientid,
6980 .get_clid_cred = nfs4_get_setclientid_cred,
6983 #if defined(CONFIG_NFS_V4_1)
6984 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
6985 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6986 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6987 .recover_open = nfs41_open_expired,
6988 .recover_lock = nfs41_lock_expired,
6989 .establish_clid = nfs41_init_clientid,
6990 .get_clid_cred = nfs4_get_exchange_id_cred,
6992 #endif /* CONFIG_NFS_V4_1 */
6994 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
6995 .sched_state_renewal = nfs4_proc_async_renew,
6996 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
6997 .renew_lease = nfs4_proc_renew,
7000 #if defined(CONFIG_NFS_V4_1)
7001 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
7002 .sched_state_renewal = nfs41_proc_async_sequence,
7003 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
7004 .renew_lease = nfs4_proc_sequence,
7008 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
7010 .init_caps = NFS_CAP_READDIRPLUS
7011 | NFS_CAP_ATOMIC_OPEN
7012 | NFS_CAP_CHANGE_ATTR
7013 | NFS_CAP_POSIX_LOCK,
7014 .call_sync = _nfs4_call_sync,
7015 .match_stateid = nfs4_match_stateid,
7016 .find_root_sec = nfs4_find_root_sec,
7017 .free_lock_state = nfs4_release_lockowner,
7018 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
7019 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
7020 .state_renewal_ops = &nfs40_state_renewal_ops,
7023 #if defined(CONFIG_NFS_V4_1)
7024 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
7026 .init_caps = NFS_CAP_READDIRPLUS
7027 | NFS_CAP_ATOMIC_OPEN
7028 | NFS_CAP_CHANGE_ATTR
7029 | NFS_CAP_POSIX_LOCK
7030 | NFS_CAP_STATEID_NFSV41
7031 | NFS_CAP_ATOMIC_OPEN_V1,
7032 .call_sync = nfs4_call_sync_sequence,
7033 .match_stateid = nfs41_match_stateid,
7034 .find_root_sec = nfs41_find_root_sec,
7035 .free_lock_state = nfs41_free_lock_state,
7036 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7037 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7038 .state_renewal_ops = &nfs41_state_renewal_ops,
7042 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
7043 [0] = &nfs_v4_0_minor_ops,
7044 #if defined(CONFIG_NFS_V4_1)
7045 [1] = &nfs_v4_1_minor_ops,
7049 const struct inode_operations nfs4_dir_inode_operations = {
7050 .create = nfs_create,
7051 .lookup = nfs_lookup,
7052 .atomic_open = nfs_atomic_open,
7054 .unlink = nfs_unlink,
7055 .symlink = nfs_symlink,
7059 .rename = nfs_rename,
7060 .permission = nfs_permission,
7061 .getattr = nfs_getattr,
7062 .setattr = nfs_setattr,
7063 .getxattr = generic_getxattr,
7064 .setxattr = generic_setxattr,
7065 .listxattr = generic_listxattr,
7066 .removexattr = generic_removexattr,
7069 static const struct inode_operations nfs4_file_inode_operations = {
7070 .permission = nfs_permission,
7071 .getattr = nfs_getattr,
7072 .setattr = nfs_setattr,
7073 .getxattr = generic_getxattr,
7074 .setxattr = generic_setxattr,
7075 .listxattr = generic_listxattr,
7076 .removexattr = generic_removexattr,
7079 const struct nfs_rpc_ops nfs_v4_clientops = {
7080 .version = 4, /* protocol version */
7081 .dentry_ops = &nfs4_dentry_operations,
7082 .dir_inode_ops = &nfs4_dir_inode_operations,
7083 .file_inode_ops = &nfs4_file_inode_operations,
7084 .file_ops = &nfs4_file_operations,
7085 .getroot = nfs4_proc_get_root,
7086 .submount = nfs4_submount,
7087 .try_mount = nfs4_try_mount,
7088 .getattr = nfs4_proc_getattr,
7089 .setattr = nfs4_proc_setattr,
7090 .lookup = nfs4_proc_lookup,
7091 .access = nfs4_proc_access,
7092 .readlink = nfs4_proc_readlink,
7093 .create = nfs4_proc_create,
7094 .remove = nfs4_proc_remove,
7095 .unlink_setup = nfs4_proc_unlink_setup,
7096 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
7097 .unlink_done = nfs4_proc_unlink_done,
7098 .rename = nfs4_proc_rename,
7099 .rename_setup = nfs4_proc_rename_setup,
7100 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
7101 .rename_done = nfs4_proc_rename_done,
7102 .link = nfs4_proc_link,
7103 .symlink = nfs4_proc_symlink,
7104 .mkdir = nfs4_proc_mkdir,
7105 .rmdir = nfs4_proc_remove,
7106 .readdir = nfs4_proc_readdir,
7107 .mknod = nfs4_proc_mknod,
7108 .statfs = nfs4_proc_statfs,
7109 .fsinfo = nfs4_proc_fsinfo,
7110 .pathconf = nfs4_proc_pathconf,
7111 .set_capabilities = nfs4_server_capabilities,
7112 .decode_dirent = nfs4_decode_dirent,
7113 .read_setup = nfs4_proc_read_setup,
7114 .read_pageio_init = pnfs_pageio_init_read,
7115 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
7116 .read_done = nfs4_read_done,
7117 .write_setup = nfs4_proc_write_setup,
7118 .write_pageio_init = pnfs_pageio_init_write,
7119 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
7120 .write_done = nfs4_write_done,
7121 .commit_setup = nfs4_proc_commit_setup,
7122 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
7123 .commit_done = nfs4_commit_done,
7124 .lock = nfs4_proc_lock,
7125 .clear_acl_cache = nfs4_zap_acl_attr,
7126 .close_context = nfs4_close_context,
7127 .open_context = nfs4_atomic_open,
7128 .have_delegation = nfs4_have_delegation,
7129 .return_delegation = nfs4_inode_return_delegation,
7130 .alloc_client = nfs4_alloc_client,
7131 .init_client = nfs4_init_client,
7132 .free_client = nfs4_free_client,
7133 .create_server = nfs4_create_server,
7134 .clone_server = nfs_clone_server,
7137 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7138 .prefix = XATTR_NAME_NFSV4_ACL,
7139 .list = nfs4_xattr_list_nfs4_acl,
7140 .get = nfs4_xattr_get_nfs4_acl,
7141 .set = nfs4_xattr_set_nfs4_acl,
7144 const struct xattr_handler *nfs4_xattr_handlers[] = {
7145 &nfs4_xattr_nfs4_acl_handler,