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 #include "nfs4trace.h"
71 #define NFSDBG_FACILITY NFSDBG_PROC
73 #define NFS4_POLL_RETRY_MIN (HZ/10)
74 #define NFS4_POLL_RETRY_MAX (15*HZ)
77 static int _nfs4_proc_open(struct nfs4_opendata *data);
78 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
79 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
80 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
82 static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
83 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
84 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
85 struct nfs_fattr *fattr, struct iattr *sattr,
86 struct nfs4_state *state, struct nfs4_label *ilabel,
87 struct nfs4_label *olabel);
88 #ifdef CONFIG_NFS_V4_1
89 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
91 static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
95 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
96 static inline struct nfs4_label *
97 nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
98 struct iattr *sattr, struct nfs4_label *label)
105 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
108 err = security_dentry_init_security(dentry, sattr->ia_mode,
109 &dentry->d_name, (void **)&label->label, &label->len);
116 nfs4_label_release_security(struct nfs4_label *label)
119 security_release_secctx(label->label, label->len);
121 static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
124 return server->attr_bitmask;
126 return server->attr_bitmask_nl;
129 static inline struct nfs4_label *
130 nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
131 struct iattr *sattr, struct nfs4_label *l)
134 nfs4_label_release_security(struct nfs4_label *label)
137 nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
138 { return server->attr_bitmask; }
141 /* Prevent leaks of NFSv4 errors into userland */
142 static int nfs4_map_errors(int err)
147 case -NFS4ERR_RESOURCE:
148 case -NFS4ERR_LAYOUTTRYLATER:
149 case -NFS4ERR_RECALLCONFLICT:
151 case -NFS4ERR_WRONGSEC:
152 case -NFS4ERR_WRONG_CRED:
154 case -NFS4ERR_BADOWNER:
155 case -NFS4ERR_BADNAME:
157 case -NFS4ERR_SHARE_DENIED:
159 case -NFS4ERR_MINOR_VERS_MISMATCH:
160 return -EPROTONOSUPPORT;
161 case -NFS4ERR_ACCESS:
163 case -NFS4ERR_FILE_OPEN:
166 dprintk("%s could not handle NFSv4 error %d\n",
174 * This is our standard bitmap for GETATTR requests.
176 const u32 nfs4_fattr_bitmap[3] = {
178 | FATTR4_WORD0_CHANGE
181 | FATTR4_WORD0_FILEID,
183 | FATTR4_WORD1_NUMLINKS
185 | FATTR4_WORD1_OWNER_GROUP
186 | FATTR4_WORD1_RAWDEV
187 | FATTR4_WORD1_SPACE_USED
188 | FATTR4_WORD1_TIME_ACCESS
189 | FATTR4_WORD1_TIME_METADATA
190 | FATTR4_WORD1_TIME_MODIFY,
191 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
192 FATTR4_WORD2_SECURITY_LABEL
196 static const u32 nfs4_pnfs_open_bitmap[3] = {
198 | FATTR4_WORD0_CHANGE
201 | FATTR4_WORD0_FILEID,
203 | FATTR4_WORD1_NUMLINKS
205 | FATTR4_WORD1_OWNER_GROUP
206 | FATTR4_WORD1_RAWDEV
207 | FATTR4_WORD1_SPACE_USED
208 | FATTR4_WORD1_TIME_ACCESS
209 | FATTR4_WORD1_TIME_METADATA
210 | FATTR4_WORD1_TIME_MODIFY,
211 FATTR4_WORD2_MDSTHRESHOLD
214 static const u32 nfs4_open_noattr_bitmap[3] = {
216 | FATTR4_WORD0_CHANGE
217 | FATTR4_WORD0_FILEID,
220 const u32 nfs4_statfs_bitmap[3] = {
221 FATTR4_WORD0_FILES_AVAIL
222 | FATTR4_WORD0_FILES_FREE
223 | FATTR4_WORD0_FILES_TOTAL,
224 FATTR4_WORD1_SPACE_AVAIL
225 | FATTR4_WORD1_SPACE_FREE
226 | FATTR4_WORD1_SPACE_TOTAL
229 const u32 nfs4_pathconf_bitmap[3] = {
231 | FATTR4_WORD0_MAXNAME,
235 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
236 | FATTR4_WORD0_MAXREAD
237 | FATTR4_WORD0_MAXWRITE
238 | FATTR4_WORD0_LEASE_TIME,
239 FATTR4_WORD1_TIME_DELTA
240 | FATTR4_WORD1_FS_LAYOUT_TYPES,
241 FATTR4_WORD2_LAYOUT_BLKSIZE
244 const u32 nfs4_fs_locations_bitmap[3] = {
246 | FATTR4_WORD0_CHANGE
249 | FATTR4_WORD0_FILEID
250 | FATTR4_WORD0_FS_LOCATIONS,
252 | FATTR4_WORD1_NUMLINKS
254 | FATTR4_WORD1_OWNER_GROUP
255 | FATTR4_WORD1_RAWDEV
256 | FATTR4_WORD1_SPACE_USED
257 | FATTR4_WORD1_TIME_ACCESS
258 | FATTR4_WORD1_TIME_METADATA
259 | FATTR4_WORD1_TIME_MODIFY
260 | FATTR4_WORD1_MOUNTED_ON_FILEID,
263 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
264 struct nfs4_readdir_arg *readdir)
269 readdir->cookie = cookie;
270 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
275 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
280 * NFSv4 servers do not return entries for '.' and '..'
281 * Therefore, we fake these entries here. We let '.'
282 * have cookie 0 and '..' have cookie 1. Note that
283 * when talking to the server, we always send cookie 0
286 start = p = kmap_atomic(*readdir->pages);
289 *p++ = xdr_one; /* next */
290 *p++ = xdr_zero; /* cookie, first word */
291 *p++ = xdr_one; /* cookie, second word */
292 *p++ = xdr_one; /* entry len */
293 memcpy(p, ".\0\0\0", 4); /* entry */
295 *p++ = xdr_one; /* bitmap length */
296 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
297 *p++ = htonl(8); /* attribute buffer length */
298 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
301 *p++ = xdr_one; /* next */
302 *p++ = xdr_zero; /* cookie, first word */
303 *p++ = xdr_two; /* cookie, second word */
304 *p++ = xdr_two; /* entry len */
305 memcpy(p, "..\0\0", 4); /* entry */
307 *p++ = xdr_one; /* bitmap length */
308 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
309 *p++ = htonl(8); /* attribute buffer length */
310 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
312 readdir->pgbase = (char *)p - (char *)start;
313 readdir->count -= readdir->pgbase;
314 kunmap_atomic(start);
317 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
324 *timeout = NFS4_POLL_RETRY_MIN;
325 if (*timeout > NFS4_POLL_RETRY_MAX)
326 *timeout = NFS4_POLL_RETRY_MAX;
327 freezable_schedule_timeout_killable_unsafe(*timeout);
328 if (fatal_signal_pending(current))
334 /* This is the error handling routine for processes that are allowed
337 static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
339 struct nfs_client *clp = server->nfs_client;
340 struct nfs4_state *state = exception->state;
341 struct inode *inode = exception->inode;
344 exception->retry = 0;
348 case -NFS4ERR_OPENMODE:
349 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
350 nfs4_inode_return_delegation(inode);
351 exception->retry = 1;
356 ret = nfs4_schedule_stateid_recovery(server, state);
359 goto wait_on_recovery;
360 case -NFS4ERR_DELEG_REVOKED:
361 case -NFS4ERR_ADMIN_REVOKED:
362 case -NFS4ERR_BAD_STATEID:
363 if (inode != NULL && nfs4_have_delegation(inode, FMODE_READ)) {
364 nfs_remove_bad_delegation(inode);
365 exception->retry = 1;
370 ret = nfs4_schedule_stateid_recovery(server, state);
373 goto wait_on_recovery;
374 case -NFS4ERR_EXPIRED:
376 ret = nfs4_schedule_stateid_recovery(server, state);
380 case -NFS4ERR_STALE_STATEID:
381 case -NFS4ERR_STALE_CLIENTID:
382 nfs4_schedule_lease_recovery(clp);
383 goto wait_on_recovery;
385 ret = nfs4_schedule_migration_recovery(server);
388 goto wait_on_recovery;
389 case -NFS4ERR_LEASE_MOVED:
390 nfs4_schedule_lease_moved_recovery(clp);
391 goto wait_on_recovery;
392 #if defined(CONFIG_NFS_V4_1)
393 case -NFS4ERR_BADSESSION:
394 case -NFS4ERR_BADSLOT:
395 case -NFS4ERR_BAD_HIGH_SLOT:
396 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
397 case -NFS4ERR_DEADSESSION:
398 case -NFS4ERR_SEQ_FALSE_RETRY:
399 case -NFS4ERR_SEQ_MISORDERED:
400 dprintk("%s ERROR: %d Reset session\n", __func__,
402 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
403 goto wait_on_recovery;
404 #endif /* defined(CONFIG_NFS_V4_1) */
405 case -NFS4ERR_FILE_OPEN:
406 if (exception->timeout > HZ) {
407 /* We have retried a decent amount, time to
415 ret = nfs4_delay(server->client, &exception->timeout);
418 case -NFS4ERR_RETRY_UNCACHED_REP:
419 case -NFS4ERR_OLD_STATEID:
420 exception->retry = 1;
422 case -NFS4ERR_BADOWNER:
423 /* The following works around a Linux server bug! */
424 case -NFS4ERR_BADNAME:
425 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
426 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
427 exception->retry = 1;
428 printk(KERN_WARNING "NFS: v4 server %s "
429 "does not accept raw "
431 "Reenabling the idmapper.\n",
432 server->nfs_client->cl_hostname);
435 /* We failed to handle the error */
436 return nfs4_map_errors(ret);
438 ret = nfs4_wait_clnt_recover(clp);
439 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
442 exception->retry = 1;
447 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
448 * or 'false' otherwise.
450 static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
452 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
454 if (flavor == RPC_AUTH_GSS_KRB5I ||
455 flavor == RPC_AUTH_GSS_KRB5P)
461 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
463 spin_lock(&clp->cl_lock);
464 if (time_before(clp->cl_last_renewal,timestamp))
465 clp->cl_last_renewal = timestamp;
466 spin_unlock(&clp->cl_lock);
469 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
471 do_renew_lease(server->nfs_client, timestamp);
474 struct nfs4_call_sync_data {
475 const struct nfs_server *seq_server;
476 struct nfs4_sequence_args *seq_args;
477 struct nfs4_sequence_res *seq_res;
480 static void nfs4_init_sequence(struct nfs4_sequence_args *args,
481 struct nfs4_sequence_res *res, int cache_reply)
483 args->sa_slot = NULL;
484 args->sa_cache_this = cache_reply;
485 args->sa_privileged = 0;
490 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
492 args->sa_privileged = 1;
495 static int nfs40_setup_sequence(const struct nfs_server *server,
496 struct nfs4_sequence_args *args,
497 struct nfs4_sequence_res *res,
498 struct rpc_task *task)
500 struct nfs4_slot_table *tbl = server->nfs_client->cl_slot_tbl;
501 struct nfs4_slot *slot;
503 /* slot already allocated? */
504 if (res->sr_slot != NULL)
507 spin_lock(&tbl->slot_tbl_lock);
508 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
511 slot = nfs4_alloc_slot(tbl);
513 if (slot == ERR_PTR(-ENOMEM))
514 task->tk_timeout = HZ >> 2;
517 spin_unlock(&tbl->slot_tbl_lock);
519 args->sa_slot = slot;
523 rpc_call_start(task);
527 if (args->sa_privileged)
528 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
529 NULL, RPC_PRIORITY_PRIVILEGED);
531 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
532 spin_unlock(&tbl->slot_tbl_lock);
536 static int nfs40_sequence_done(struct rpc_task *task,
537 struct nfs4_sequence_res *res)
539 struct nfs4_slot *slot = res->sr_slot;
540 struct nfs4_slot_table *tbl;
546 spin_lock(&tbl->slot_tbl_lock);
547 if (!nfs41_wake_and_assign_slot(tbl, slot))
548 nfs4_free_slot(tbl, slot);
549 spin_unlock(&tbl->slot_tbl_lock);
556 #if defined(CONFIG_NFS_V4_1)
558 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
560 struct nfs4_session *session;
561 struct nfs4_slot_table *tbl;
562 struct nfs4_slot *slot = res->sr_slot;
563 bool send_new_highest_used_slotid = false;
566 session = tbl->session;
568 spin_lock(&tbl->slot_tbl_lock);
569 /* Be nice to the server: try to ensure that the last transmitted
570 * value for highest_user_slotid <= target_highest_slotid
572 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
573 send_new_highest_used_slotid = true;
575 if (nfs41_wake_and_assign_slot(tbl, slot)) {
576 send_new_highest_used_slotid = false;
579 nfs4_free_slot(tbl, slot);
581 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
582 send_new_highest_used_slotid = false;
584 spin_unlock(&tbl->slot_tbl_lock);
586 if (send_new_highest_used_slotid)
587 nfs41_server_notify_highest_slotid_update(session->clp);
590 int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
592 struct nfs4_session *session;
593 struct nfs4_slot *slot = res->sr_slot;
594 struct nfs_client *clp;
595 bool interrupted = false;
600 /* don't increment the sequence number if the task wasn't sent */
601 if (!RPC_WAS_SENT(task))
604 session = slot->table->session;
606 if (slot->interrupted) {
607 slot->interrupted = 0;
611 trace_nfs4_sequence_done(session, res);
612 /* Check the SEQUENCE operation status */
613 switch (res->sr_status) {
615 /* Update the slot's sequence and clientid lease timer */
618 do_renew_lease(clp, res->sr_timestamp);
619 /* Check sequence flags */
620 if (res->sr_status_flags != 0)
621 nfs4_schedule_lease_recovery(clp);
622 nfs41_update_target_slotid(slot->table, slot, res);
626 * sr_status remains 1 if an RPC level error occurred.
627 * The server may or may not have processed the sequence
629 * Mark the slot as having hosted an interrupted RPC call.
631 slot->interrupted = 1;
634 /* The server detected a resend of the RPC call and
635 * returned NFS4ERR_DELAY as per Section 2.10.6.2
638 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
643 case -NFS4ERR_BADSLOT:
645 * The slot id we used was probably retired. Try again
646 * using a different slot id.
649 case -NFS4ERR_SEQ_MISORDERED:
651 * Was the last operation on this sequence interrupted?
652 * If so, retry after bumping the sequence number.
659 * Could this slot have been previously retired?
660 * If so, then the server may be expecting seq_nr = 1!
662 if (slot->seq_nr != 1) {
667 case -NFS4ERR_SEQ_FALSE_RETRY:
671 /* Just update the slot sequence no. */
675 /* The session may be reset by one of the error handlers. */
676 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
677 nfs41_sequence_free_slot(res);
681 if (rpc_restart_call_prepare(task)) {
687 if (!rpc_restart_call(task))
689 rpc_delay(task, NFS4_POLL_RETRY_MAX);
692 EXPORT_SYMBOL_GPL(nfs41_sequence_done);
694 static int nfs4_sequence_done(struct rpc_task *task,
695 struct nfs4_sequence_res *res)
697 if (res->sr_slot == NULL)
699 if (!res->sr_slot->table->session)
700 return nfs40_sequence_done(task, res);
701 return nfs41_sequence_done(task, res);
704 int nfs41_setup_sequence(struct nfs4_session *session,
705 struct nfs4_sequence_args *args,
706 struct nfs4_sequence_res *res,
707 struct rpc_task *task)
709 struct nfs4_slot *slot;
710 struct nfs4_slot_table *tbl;
712 dprintk("--> %s\n", __func__);
713 /* slot already allocated? */
714 if (res->sr_slot != NULL)
717 tbl = &session->fc_slot_table;
719 task->tk_timeout = 0;
721 spin_lock(&tbl->slot_tbl_lock);
722 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
723 !args->sa_privileged) {
724 /* The state manager will wait until the slot table is empty */
725 dprintk("%s session is draining\n", __func__);
729 slot = nfs4_alloc_slot(tbl);
731 /* If out of memory, try again in 1/4 second */
732 if (slot == ERR_PTR(-ENOMEM))
733 task->tk_timeout = HZ >> 2;
734 dprintk("<-- %s: no free slots\n", __func__);
737 spin_unlock(&tbl->slot_tbl_lock);
739 args->sa_slot = slot;
741 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
742 slot->slot_nr, slot->seq_nr);
745 res->sr_timestamp = jiffies;
746 res->sr_status_flags = 0;
748 * sr_status is only set in decode_sequence, and so will remain
749 * set to 1 if an rpc level failure occurs.
752 trace_nfs4_setup_sequence(session, args);
754 rpc_call_start(task);
757 /* Privileged tasks are queued with top priority */
758 if (args->sa_privileged)
759 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
760 NULL, RPC_PRIORITY_PRIVILEGED);
762 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
763 spin_unlock(&tbl->slot_tbl_lock);
766 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
768 static int nfs4_setup_sequence(const struct nfs_server *server,
769 struct nfs4_sequence_args *args,
770 struct nfs4_sequence_res *res,
771 struct rpc_task *task)
773 struct nfs4_session *session = nfs4_get_session(server);
777 return nfs40_setup_sequence(server, args, res, task);
779 dprintk("--> %s clp %p session %p sr_slot %u\n",
780 __func__, session->clp, session, res->sr_slot ?
781 res->sr_slot->slot_nr : NFS4_NO_SLOT);
783 ret = nfs41_setup_sequence(session, args, res, task);
785 dprintk("<-- %s status=%d\n", __func__, ret);
789 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
791 struct nfs4_call_sync_data *data = calldata;
792 struct nfs4_session *session = nfs4_get_session(data->seq_server);
794 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
796 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
799 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
801 struct nfs4_call_sync_data *data = calldata;
803 nfs41_sequence_done(task, data->seq_res);
806 static const struct rpc_call_ops nfs41_call_sync_ops = {
807 .rpc_call_prepare = nfs41_call_sync_prepare,
808 .rpc_call_done = nfs41_call_sync_done,
811 #else /* !CONFIG_NFS_V4_1 */
813 static int nfs4_setup_sequence(const struct nfs_server *server,
814 struct nfs4_sequence_args *args,
815 struct nfs4_sequence_res *res,
816 struct rpc_task *task)
818 return nfs40_setup_sequence(server, args, res, task);
821 static int nfs4_sequence_done(struct rpc_task *task,
822 struct nfs4_sequence_res *res)
824 return nfs40_sequence_done(task, res);
827 #endif /* !CONFIG_NFS_V4_1 */
829 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
831 struct nfs4_call_sync_data *data = calldata;
832 nfs4_setup_sequence(data->seq_server,
833 data->seq_args, data->seq_res, task);
836 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
838 struct nfs4_call_sync_data *data = calldata;
839 nfs4_sequence_done(task, data->seq_res);
842 static const struct rpc_call_ops nfs40_call_sync_ops = {
843 .rpc_call_prepare = nfs40_call_sync_prepare,
844 .rpc_call_done = nfs40_call_sync_done,
847 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
848 struct nfs_server *server,
849 struct rpc_message *msg,
850 struct nfs4_sequence_args *args,
851 struct nfs4_sequence_res *res)
854 struct rpc_task *task;
855 struct nfs_client *clp = server->nfs_client;
856 struct nfs4_call_sync_data data = {
857 .seq_server = server,
861 struct rpc_task_setup task_setup = {
864 .callback_ops = clp->cl_mvops->call_sync_ops,
865 .callback_data = &data
868 task = rpc_run_task(&task_setup);
872 ret = task->tk_status;
879 int nfs4_call_sync(struct rpc_clnt *clnt,
880 struct nfs_server *server,
881 struct rpc_message *msg,
882 struct nfs4_sequence_args *args,
883 struct nfs4_sequence_res *res,
886 nfs4_init_sequence(args, res, cache_reply);
887 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
890 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
892 struct nfs_inode *nfsi = NFS_I(dir);
894 spin_lock(&dir->i_lock);
895 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
896 if (!cinfo->atomic || cinfo->before != dir->i_version)
897 nfs_force_lookup_revalidate(dir);
898 dir->i_version = cinfo->after;
899 nfs_fscache_invalidate(dir);
900 spin_unlock(&dir->i_lock);
903 struct nfs4_opendata {
905 struct nfs_openargs o_arg;
906 struct nfs_openres o_res;
907 struct nfs_open_confirmargs c_arg;
908 struct nfs_open_confirmres c_res;
909 struct nfs4_string owner_name;
910 struct nfs4_string group_name;
911 struct nfs_fattr f_attr;
912 struct nfs4_label *f_label;
914 struct dentry *dentry;
915 struct nfs4_state_owner *owner;
916 struct nfs4_state *state;
918 unsigned long timestamp;
919 unsigned int rpc_done : 1;
920 unsigned int file_created : 1;
921 unsigned int is_recover : 1;
926 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
927 int err, struct nfs4_exception *exception)
931 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
933 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
934 exception->retry = 1;
938 static enum open_claim_type4
939 nfs4_map_atomic_open_claim(struct nfs_server *server,
940 enum open_claim_type4 claim)
942 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
947 case NFS4_OPEN_CLAIM_FH:
948 return NFS4_OPEN_CLAIM_NULL;
949 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
950 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
951 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
952 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
956 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
958 p->o_res.f_attr = &p->f_attr;
959 p->o_res.f_label = p->f_label;
960 p->o_res.seqid = p->o_arg.seqid;
961 p->c_res.seqid = p->c_arg.seqid;
962 p->o_res.server = p->o_arg.server;
963 p->o_res.access_request = p->o_arg.access;
964 nfs_fattr_init(&p->f_attr);
965 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
968 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
969 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
970 const struct iattr *attrs,
971 struct nfs4_label *label,
972 enum open_claim_type4 claim,
975 struct dentry *parent = dget_parent(dentry);
976 struct inode *dir = parent->d_inode;
977 struct nfs_server *server = NFS_SERVER(dir);
978 struct nfs4_opendata *p;
980 p = kzalloc(sizeof(*p), gfp_mask);
984 p->f_label = nfs4_label_alloc(server, gfp_mask);
985 if (IS_ERR(p->f_label))
988 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
989 if (p->o_arg.seqid == NULL)
991 nfs_sb_active(dentry->d_sb);
992 p->dentry = dget(dentry);
995 atomic_inc(&sp->so_count);
996 p->o_arg.open_flags = flags;
997 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
998 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
999 * will return permission denied for all bits until close */
1000 if (!(flags & O_EXCL)) {
1001 /* ask server to check for all possible rights as results
1003 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1004 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
1006 p->o_arg.clientid = server->nfs_client->cl_clientid;
1007 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1008 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
1009 p->o_arg.name = &dentry->d_name;
1010 p->o_arg.server = server;
1011 p->o_arg.bitmask = nfs4_bitmask(server, label);
1012 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1013 p->o_arg.label = label;
1014 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1015 switch (p->o_arg.claim) {
1016 case NFS4_OPEN_CLAIM_NULL:
1017 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1018 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1019 p->o_arg.fh = NFS_FH(dir);
1021 case NFS4_OPEN_CLAIM_PREVIOUS:
1022 case NFS4_OPEN_CLAIM_FH:
1023 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1024 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1025 p->o_arg.fh = NFS_FH(dentry->d_inode);
1027 if (attrs != NULL && attrs->ia_valid != 0) {
1030 p->o_arg.u.attrs = &p->attrs;
1031 memcpy(&p->attrs, attrs, sizeof(p->attrs));
1034 verf[1] = current->pid;
1035 memcpy(p->o_arg.u.verifier.data, verf,
1036 sizeof(p->o_arg.u.verifier.data));
1038 p->c_arg.fh = &p->o_res.fh;
1039 p->c_arg.stateid = &p->o_res.stateid;
1040 p->c_arg.seqid = p->o_arg.seqid;
1041 nfs4_init_opendata_res(p);
1042 kref_init(&p->kref);
1046 nfs4_label_free(p->f_label);
1054 static void nfs4_opendata_free(struct kref *kref)
1056 struct nfs4_opendata *p = container_of(kref,
1057 struct nfs4_opendata, kref);
1058 struct super_block *sb = p->dentry->d_sb;
1060 nfs_free_seqid(p->o_arg.seqid);
1061 if (p->state != NULL)
1062 nfs4_put_open_state(p->state);
1063 nfs4_put_state_owner(p->owner);
1065 nfs4_label_free(p->f_label);
1069 nfs_sb_deactive(sb);
1070 nfs_fattr_free_names(&p->f_attr);
1074 static void nfs4_opendata_put(struct nfs4_opendata *p)
1077 kref_put(&p->kref, nfs4_opendata_free);
1080 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1084 ret = rpc_wait_for_completion_task(task);
1088 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
1092 if (open_mode & (O_EXCL|O_TRUNC))
1094 switch (mode & (FMODE_READ|FMODE_WRITE)) {
1096 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1097 && state->n_rdonly != 0;
1100 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1101 && state->n_wronly != 0;
1103 case FMODE_READ|FMODE_WRITE:
1104 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1105 && state->n_rdwr != 0;
1111 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
1113 if (delegation == NULL)
1115 if ((delegation->type & fmode) != fmode)
1117 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1119 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1121 nfs_mark_delegation_referenced(delegation);
1125 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
1134 case FMODE_READ|FMODE_WRITE:
1137 nfs4_state_set_mode_locked(state, state->state | fmode);
1140 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1142 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1143 nfs4_stateid_copy(&state->stateid, stateid);
1144 nfs4_stateid_copy(&state->open_stateid, stateid);
1145 set_bit(NFS_OPEN_STATE, &state->flags);
1148 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1151 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1153 case FMODE_READ|FMODE_WRITE:
1154 set_bit(NFS_O_RDWR_STATE, &state->flags);
1158 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1160 write_seqlock(&state->seqlock);
1161 nfs_set_open_stateid_locked(state, stateid, fmode);
1162 write_sequnlock(&state->seqlock);
1165 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1168 * Protect the call to nfs4_state_set_mode_locked and
1169 * serialise the stateid update
1171 write_seqlock(&state->seqlock);
1172 if (deleg_stateid != NULL) {
1173 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1174 set_bit(NFS_DELEGATED_STATE, &state->flags);
1176 if (open_stateid != NULL)
1177 nfs_set_open_stateid_locked(state, open_stateid, fmode);
1178 write_sequnlock(&state->seqlock);
1179 spin_lock(&state->owner->so_lock);
1180 update_open_stateflags(state, fmode);
1181 spin_unlock(&state->owner->so_lock);
1184 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
1186 struct nfs_inode *nfsi = NFS_I(state->inode);
1187 struct nfs_delegation *deleg_cur;
1190 fmode &= (FMODE_READ|FMODE_WRITE);
1193 deleg_cur = rcu_dereference(nfsi->delegation);
1194 if (deleg_cur == NULL)
1197 spin_lock(&deleg_cur->lock);
1198 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
1199 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
1200 (deleg_cur->type & fmode) != fmode)
1201 goto no_delegation_unlock;
1203 if (delegation == NULL)
1204 delegation = &deleg_cur->stateid;
1205 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1206 goto no_delegation_unlock;
1208 nfs_mark_delegation_referenced(deleg_cur);
1209 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1211 no_delegation_unlock:
1212 spin_unlock(&deleg_cur->lock);
1216 if (!ret && open_stateid != NULL) {
1217 __update_open_stateid(state, open_stateid, NULL, fmode);
1225 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1227 struct nfs_delegation *delegation;
1230 delegation = rcu_dereference(NFS_I(inode)->delegation);
1231 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1236 nfs4_inode_return_delegation(inode);
1239 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1241 struct nfs4_state *state = opendata->state;
1242 struct nfs_inode *nfsi = NFS_I(state->inode);
1243 struct nfs_delegation *delegation;
1244 int open_mode = opendata->o_arg.open_flags;
1245 fmode_t fmode = opendata->o_arg.fmode;
1246 nfs4_stateid stateid;
1250 if (can_open_cached(state, fmode, open_mode)) {
1251 spin_lock(&state->owner->so_lock);
1252 if (can_open_cached(state, fmode, open_mode)) {
1253 update_open_stateflags(state, fmode);
1254 spin_unlock(&state->owner->so_lock);
1255 goto out_return_state;
1257 spin_unlock(&state->owner->so_lock);
1260 delegation = rcu_dereference(nfsi->delegation);
1261 if (!can_open_delegated(delegation, fmode)) {
1265 /* Save the delegation */
1266 nfs4_stateid_copy(&stateid, &delegation->stateid);
1268 nfs_release_seqid(opendata->o_arg.seqid);
1269 if (!opendata->is_recover) {
1270 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1276 /* Try to update the stateid using the delegation */
1277 if (update_open_stateid(state, NULL, &stateid, fmode))
1278 goto out_return_state;
1281 return ERR_PTR(ret);
1283 atomic_inc(&state->count);
1288 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1290 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1291 struct nfs_delegation *delegation;
1292 int delegation_flags = 0;
1295 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1297 delegation_flags = delegation->flags;
1299 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1300 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1301 "returning a delegation for "
1302 "OPEN(CLAIM_DELEGATE_CUR)\n",
1304 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1305 nfs_inode_set_delegation(state->inode,
1306 data->owner->so_cred,
1309 nfs_inode_reclaim_delegation(state->inode,
1310 data->owner->so_cred,
1315 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1316 * and update the nfs4_state.
1318 static struct nfs4_state *
1319 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1321 struct inode *inode = data->state->inode;
1322 struct nfs4_state *state = data->state;
1325 if (!data->rpc_done) {
1326 if (data->rpc_status) {
1327 ret = data->rpc_status;
1330 /* cached opens have already been processed */
1334 ret = nfs_refresh_inode(inode, &data->f_attr);
1338 if (data->o_res.delegation_type != 0)
1339 nfs4_opendata_check_deleg(data, state);
1341 update_open_stateid(state, &data->o_res.stateid, NULL,
1343 atomic_inc(&state->count);
1347 return ERR_PTR(ret);
1351 static struct nfs4_state *
1352 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1354 struct inode *inode;
1355 struct nfs4_state *state = NULL;
1358 if (!data->rpc_done) {
1359 state = nfs4_try_open_cached(data);
1364 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1366 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1367 ret = PTR_ERR(inode);
1371 state = nfs4_get_open_state(inode, data->owner);
1374 if (data->o_res.delegation_type != 0)
1375 nfs4_opendata_check_deleg(data, state);
1376 update_open_stateid(state, &data->o_res.stateid, NULL,
1380 nfs_release_seqid(data->o_arg.seqid);
1385 return ERR_PTR(ret);
1388 static struct nfs4_state *
1389 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1391 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1392 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1393 return _nfs4_opendata_to_nfs4_state(data);
1396 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1398 struct nfs_inode *nfsi = NFS_I(state->inode);
1399 struct nfs_open_context *ctx;
1401 spin_lock(&state->inode->i_lock);
1402 list_for_each_entry(ctx, &nfsi->open_files, list) {
1403 if (ctx->state != state)
1405 get_nfs_open_context(ctx);
1406 spin_unlock(&state->inode->i_lock);
1409 spin_unlock(&state->inode->i_lock);
1410 return ERR_PTR(-ENOENT);
1413 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1414 struct nfs4_state *state, enum open_claim_type4 claim)
1416 struct nfs4_opendata *opendata;
1418 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1419 NULL, NULL, claim, GFP_NOFS);
1420 if (opendata == NULL)
1421 return ERR_PTR(-ENOMEM);
1422 opendata->state = state;
1423 atomic_inc(&state->count);
1427 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1429 struct nfs4_state *newstate;
1432 opendata->o_arg.open_flags = 0;
1433 opendata->o_arg.fmode = fmode;
1434 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1435 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1436 nfs4_init_opendata_res(opendata);
1437 ret = _nfs4_recover_proc_open(opendata);
1440 newstate = nfs4_opendata_to_nfs4_state(opendata);
1441 if (IS_ERR(newstate))
1442 return PTR_ERR(newstate);
1443 nfs4_close_state(newstate, fmode);
1448 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1450 struct nfs4_state *newstate;
1453 /* memory barrier prior to reading state->n_* */
1454 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1455 clear_bit(NFS_OPEN_STATE, &state->flags);
1457 if (state->n_rdwr != 0) {
1458 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1459 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1462 if (newstate != state)
1465 if (state->n_wronly != 0) {
1466 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1467 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1470 if (newstate != state)
1473 if (state->n_rdonly != 0) {
1474 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1475 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1478 if (newstate != state)
1482 * We may have performed cached opens for all three recoveries.
1483 * Check if we need to update the current stateid.
1485 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1486 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1487 write_seqlock(&state->seqlock);
1488 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1489 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1490 write_sequnlock(&state->seqlock);
1497 * reclaim state on the server after a reboot.
1499 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1501 struct nfs_delegation *delegation;
1502 struct nfs4_opendata *opendata;
1503 fmode_t delegation_type = 0;
1506 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1507 NFS4_OPEN_CLAIM_PREVIOUS);
1508 if (IS_ERR(opendata))
1509 return PTR_ERR(opendata);
1511 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1512 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1513 delegation_type = delegation->type;
1515 opendata->o_arg.u.delegation_type = delegation_type;
1516 status = nfs4_open_recover(opendata, state);
1517 nfs4_opendata_put(opendata);
1521 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1523 struct nfs_server *server = NFS_SERVER(state->inode);
1524 struct nfs4_exception exception = { };
1527 err = _nfs4_do_open_reclaim(ctx, state);
1528 trace_nfs4_open_reclaim(ctx, 0, err);
1529 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1531 if (err != -NFS4ERR_DELAY)
1533 nfs4_handle_exception(server, err, &exception);
1534 } while (exception.retry);
1538 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1540 struct nfs_open_context *ctx;
1543 ctx = nfs4_state_find_open_context(state);
1546 ret = nfs4_do_open_reclaim(ctx, state);
1547 put_nfs_open_context(ctx);
1551 static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1555 printk(KERN_ERR "NFS: %s: unhandled error "
1556 "%d.\n", __func__, err);
1561 case -NFS4ERR_BADSESSION:
1562 case -NFS4ERR_BADSLOT:
1563 case -NFS4ERR_BAD_HIGH_SLOT:
1564 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1565 case -NFS4ERR_DEADSESSION:
1566 set_bit(NFS_DELEGATED_STATE, &state->flags);
1567 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1569 case -NFS4ERR_STALE_CLIENTID:
1570 case -NFS4ERR_STALE_STATEID:
1571 set_bit(NFS_DELEGATED_STATE, &state->flags);
1572 case -NFS4ERR_EXPIRED:
1573 /* Don't recall a delegation if it was lost */
1574 nfs4_schedule_lease_recovery(server->nfs_client);
1576 case -NFS4ERR_MOVED:
1577 nfs4_schedule_migration_recovery(server);
1579 case -NFS4ERR_LEASE_MOVED:
1580 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1582 case -NFS4ERR_DELEG_REVOKED:
1583 case -NFS4ERR_ADMIN_REVOKED:
1584 case -NFS4ERR_BAD_STATEID:
1585 case -NFS4ERR_OPENMODE:
1586 nfs_inode_find_state_and_recover(state->inode,
1588 nfs4_schedule_stateid_recovery(server, state);
1590 case -NFS4ERR_DELAY:
1591 case -NFS4ERR_GRACE:
1592 set_bit(NFS_DELEGATED_STATE, &state->flags);
1596 case -NFS4ERR_DENIED:
1597 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1603 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1605 struct nfs_server *server = NFS_SERVER(state->inode);
1606 struct nfs4_opendata *opendata;
1609 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1610 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1611 if (IS_ERR(opendata))
1612 return PTR_ERR(opendata);
1613 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1614 err = nfs4_open_recover(opendata, state);
1615 nfs4_opendata_put(opendata);
1616 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1619 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1621 struct nfs4_opendata *data = calldata;
1623 nfs40_setup_sequence(data->o_arg.server, &data->c_arg.seq_args,
1624 &data->c_res.seq_res, task);
1627 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1629 struct nfs4_opendata *data = calldata;
1631 nfs40_sequence_done(task, &data->c_res.seq_res);
1633 data->rpc_status = task->tk_status;
1634 if (data->rpc_status == 0) {
1635 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1636 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1637 renew_lease(data->o_res.server, data->timestamp);
1642 static void nfs4_open_confirm_release(void *calldata)
1644 struct nfs4_opendata *data = calldata;
1645 struct nfs4_state *state = NULL;
1647 /* If this request hasn't been cancelled, do nothing */
1648 if (data->cancelled == 0)
1650 /* In case of error, no cleanup! */
1651 if (!data->rpc_done)
1653 state = nfs4_opendata_to_nfs4_state(data);
1655 nfs4_close_state(state, data->o_arg.fmode);
1657 nfs4_opendata_put(data);
1660 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1661 .rpc_call_prepare = nfs4_open_confirm_prepare,
1662 .rpc_call_done = nfs4_open_confirm_done,
1663 .rpc_release = nfs4_open_confirm_release,
1667 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1669 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1671 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1672 struct rpc_task *task;
1673 struct rpc_message msg = {
1674 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1675 .rpc_argp = &data->c_arg,
1676 .rpc_resp = &data->c_res,
1677 .rpc_cred = data->owner->so_cred,
1679 struct rpc_task_setup task_setup_data = {
1680 .rpc_client = server->client,
1681 .rpc_message = &msg,
1682 .callback_ops = &nfs4_open_confirm_ops,
1683 .callback_data = data,
1684 .workqueue = nfsiod_workqueue,
1685 .flags = RPC_TASK_ASYNC,
1689 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
1690 kref_get(&data->kref);
1692 data->rpc_status = 0;
1693 data->timestamp = jiffies;
1694 task = rpc_run_task(&task_setup_data);
1696 return PTR_ERR(task);
1697 status = nfs4_wait_for_completion_rpc_task(task);
1699 data->cancelled = 1;
1702 status = data->rpc_status;
1707 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1709 struct nfs4_opendata *data = calldata;
1710 struct nfs4_state_owner *sp = data->owner;
1711 struct nfs_client *clp = sp->so_server->nfs_client;
1713 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1716 * Check if we still need to send an OPEN call, or if we can use
1717 * a delegation instead.
1719 if (data->state != NULL) {
1720 struct nfs_delegation *delegation;
1722 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1725 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1726 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1727 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
1728 can_open_delegated(delegation, data->o_arg.fmode))
1729 goto unlock_no_action;
1732 /* Update client id. */
1733 data->o_arg.clientid = clp->cl_clientid;
1734 switch (data->o_arg.claim) {
1735 case NFS4_OPEN_CLAIM_PREVIOUS:
1736 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1737 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1738 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
1739 case NFS4_OPEN_CLAIM_FH:
1740 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1741 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1743 data->timestamp = jiffies;
1744 if (nfs4_setup_sequence(data->o_arg.server,
1745 &data->o_arg.seq_args,
1746 &data->o_res.seq_res,
1748 nfs_release_seqid(data->o_arg.seqid);
1750 /* Set the create mode (note dependency on the session type) */
1751 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1752 if (data->o_arg.open_flags & O_EXCL) {
1753 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1754 if (nfs4_has_persistent_session(clp))
1755 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1756 else if (clp->cl_mvops->minor_version > 0)
1757 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1763 task->tk_action = NULL;
1765 nfs4_sequence_done(task, &data->o_res.seq_res);
1768 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1770 struct nfs4_opendata *data = calldata;
1772 data->rpc_status = task->tk_status;
1774 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1777 if (task->tk_status == 0) {
1778 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1779 switch (data->o_res.f_attr->mode & S_IFMT) {
1783 data->rpc_status = -ELOOP;
1786 data->rpc_status = -EISDIR;
1789 data->rpc_status = -ENOTDIR;
1792 renew_lease(data->o_res.server, data->timestamp);
1793 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1794 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1799 static void nfs4_open_release(void *calldata)
1801 struct nfs4_opendata *data = calldata;
1802 struct nfs4_state *state = NULL;
1804 /* If this request hasn't been cancelled, do nothing */
1805 if (data->cancelled == 0)
1807 /* In case of error, no cleanup! */
1808 if (data->rpc_status != 0 || !data->rpc_done)
1810 /* In case we need an open_confirm, no cleanup! */
1811 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1813 state = nfs4_opendata_to_nfs4_state(data);
1815 nfs4_close_state(state, data->o_arg.fmode);
1817 nfs4_opendata_put(data);
1820 static const struct rpc_call_ops nfs4_open_ops = {
1821 .rpc_call_prepare = nfs4_open_prepare,
1822 .rpc_call_done = nfs4_open_done,
1823 .rpc_release = nfs4_open_release,
1826 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1828 struct inode *dir = data->dir->d_inode;
1829 struct nfs_server *server = NFS_SERVER(dir);
1830 struct nfs_openargs *o_arg = &data->o_arg;
1831 struct nfs_openres *o_res = &data->o_res;
1832 struct rpc_task *task;
1833 struct rpc_message msg = {
1834 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1837 .rpc_cred = data->owner->so_cred,
1839 struct rpc_task_setup task_setup_data = {
1840 .rpc_client = server->client,
1841 .rpc_message = &msg,
1842 .callback_ops = &nfs4_open_ops,
1843 .callback_data = data,
1844 .workqueue = nfsiod_workqueue,
1845 .flags = RPC_TASK_ASYNC,
1849 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1850 kref_get(&data->kref);
1852 data->rpc_status = 0;
1853 data->cancelled = 0;
1854 data->is_recover = 0;
1856 nfs4_set_sequence_privileged(&o_arg->seq_args);
1857 data->is_recover = 1;
1859 task = rpc_run_task(&task_setup_data);
1861 return PTR_ERR(task);
1862 status = nfs4_wait_for_completion_rpc_task(task);
1864 data->cancelled = 1;
1867 status = data->rpc_status;
1873 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1875 struct inode *dir = data->dir->d_inode;
1876 struct nfs_openres *o_res = &data->o_res;
1879 status = nfs4_run_open_task(data, 1);
1880 if (status != 0 || !data->rpc_done)
1883 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1885 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1886 status = _nfs4_proc_open_confirm(data);
1894 static int nfs4_opendata_access(struct rpc_cred *cred,
1895 struct nfs4_opendata *opendata,
1896 struct nfs4_state *state, fmode_t fmode,
1899 struct nfs_access_entry cache;
1902 /* access call failed or for some reason the server doesn't
1903 * support any access modes -- defer access call until later */
1904 if (opendata->o_res.access_supported == 0)
1908 /* don't check MAY_WRITE - a newly created file may not have
1909 * write mode bits, but POSIX allows the creating process to write.
1910 * use openflags to check for exec, because fmode won't
1911 * always have FMODE_EXEC set when file open for exec. */
1912 if (openflags & __FMODE_EXEC) {
1913 /* ONLY check for exec rights */
1915 } else if (fmode & FMODE_READ)
1919 cache.jiffies = jiffies;
1920 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1921 nfs_access_add_cache(state->inode, &cache);
1923 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
1926 /* even though OPEN succeeded, access is denied. Close the file */
1927 nfs4_close_state(state, fmode);
1932 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1934 static int _nfs4_proc_open(struct nfs4_opendata *data)
1936 struct inode *dir = data->dir->d_inode;
1937 struct nfs_server *server = NFS_SERVER(dir);
1938 struct nfs_openargs *o_arg = &data->o_arg;
1939 struct nfs_openres *o_res = &data->o_res;
1942 status = nfs4_run_open_task(data, 0);
1943 if (!data->rpc_done)
1946 if (status == -NFS4ERR_BADNAME &&
1947 !(o_arg->open_flags & O_CREAT))
1952 nfs_fattr_map_and_free_names(server, &data->f_attr);
1954 if (o_arg->open_flags & O_CREAT) {
1955 update_changeattr(dir, &o_res->cinfo);
1956 if (o_arg->open_flags & O_EXCL)
1957 data->file_created = 1;
1958 else if (o_res->cinfo.before != o_res->cinfo.after)
1959 data->file_created = 1;
1961 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1962 server->caps &= ~NFS_CAP_POSIX_LOCK;
1963 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1964 status = _nfs4_proc_open_confirm(data);
1968 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1969 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
1973 static int nfs4_recover_expired_lease(struct nfs_server *server)
1975 return nfs4_client_recover_expired_lease(server->nfs_client);
1980 * reclaim state on the server after a network partition.
1981 * Assumes caller holds the appropriate lock
1983 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1985 struct nfs4_opendata *opendata;
1988 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1989 NFS4_OPEN_CLAIM_FH);
1990 if (IS_ERR(opendata))
1991 return PTR_ERR(opendata);
1992 ret = nfs4_open_recover(opendata, state);
1994 d_drop(ctx->dentry);
1995 nfs4_opendata_put(opendata);
1999 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2001 struct nfs_server *server = NFS_SERVER(state->inode);
2002 struct nfs4_exception exception = { };
2006 err = _nfs4_open_expired(ctx, state);
2007 trace_nfs4_open_expired(ctx, 0, err);
2008 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2013 case -NFS4ERR_GRACE:
2014 case -NFS4ERR_DELAY:
2015 nfs4_handle_exception(server, err, &exception);
2018 } while (exception.retry);
2023 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2025 struct nfs_open_context *ctx;
2028 ctx = nfs4_state_find_open_context(state);
2031 ret = nfs4_do_open_expired(ctx, state);
2032 put_nfs_open_context(ctx);
2036 #if defined(CONFIG_NFS_V4_1)
2037 static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
2039 struct nfs_server *server = NFS_SERVER(state->inode);
2040 nfs4_stateid *stateid = &state->stateid;
2041 struct nfs_delegation *delegation;
2042 struct rpc_cred *cred = NULL;
2043 int status = -NFS4ERR_BAD_STATEID;
2045 /* If a state reset has been done, test_stateid is unneeded */
2046 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
2049 /* Get the delegation credential for use by test/free_stateid */
2051 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2052 if (delegation != NULL &&
2053 nfs4_stateid_match(&delegation->stateid, stateid)) {
2054 cred = get_rpccred(delegation->cred);
2056 status = nfs41_test_stateid(server, stateid, cred);
2057 trace_nfs4_test_delegation_stateid(state, NULL, status);
2061 if (status != NFS_OK) {
2062 /* Free the stateid unless the server explicitly
2063 * informs us the stateid is unrecognized. */
2064 if (status != -NFS4ERR_BAD_STATEID)
2065 nfs41_free_stateid(server, stateid, cred);
2066 nfs_remove_bad_delegation(state->inode);
2068 write_seqlock(&state->seqlock);
2069 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2070 write_sequnlock(&state->seqlock);
2071 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2079 * nfs41_check_open_stateid - possibly free an open stateid
2081 * @state: NFSv4 state for an inode
2083 * Returns NFS_OK if recovery for this stateid is now finished.
2084 * Otherwise a negative NFS4ERR value is returned.
2086 static int nfs41_check_open_stateid(struct nfs4_state *state)
2088 struct nfs_server *server = NFS_SERVER(state->inode);
2089 nfs4_stateid *stateid = &state->open_stateid;
2090 struct rpc_cred *cred = state->owner->so_cred;
2093 /* If a state reset has been done, test_stateid is unneeded */
2094 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2095 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2096 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2097 return -NFS4ERR_BAD_STATEID;
2099 status = nfs41_test_stateid(server, stateid, cred);
2100 trace_nfs4_test_open_stateid(state, NULL, status);
2101 if (status != NFS_OK) {
2102 /* Free the stateid unless the server explicitly
2103 * informs us the stateid is unrecognized. */
2104 if (status != -NFS4ERR_BAD_STATEID)
2105 nfs41_free_stateid(server, stateid, cred);
2107 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2108 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2109 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2110 clear_bit(NFS_OPEN_STATE, &state->flags);
2115 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2119 nfs41_clear_delegation_stateid(state);
2120 status = nfs41_check_open_stateid(state);
2121 if (status != NFS_OK)
2122 status = nfs4_open_expired(sp, state);
2128 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2129 * fields corresponding to attributes that were used to store the verifier.
2130 * Make sure we clobber those fields in the later setattr call
2132 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2134 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2135 !(sattr->ia_valid & ATTR_ATIME_SET))
2136 sattr->ia_valid |= ATTR_ATIME;
2138 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2139 !(sattr->ia_valid & ATTR_MTIME_SET))
2140 sattr->ia_valid |= ATTR_MTIME;
2143 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2146 struct nfs_open_context *ctx)
2148 struct nfs4_state_owner *sp = opendata->owner;
2149 struct nfs_server *server = sp->so_server;
2150 struct dentry *dentry;
2151 struct nfs4_state *state;
2155 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2157 ret = _nfs4_proc_open(opendata);
2161 state = nfs4_opendata_to_nfs4_state(opendata);
2162 ret = PTR_ERR(state);
2165 if (server->caps & NFS_CAP_POSIX_LOCK)
2166 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2168 dentry = opendata->dentry;
2169 if (dentry->d_inode == NULL) {
2170 /* FIXME: Is this d_drop() ever needed? */
2172 dentry = d_add_unique(dentry, igrab(state->inode));
2173 if (dentry == NULL) {
2174 dentry = opendata->dentry;
2175 } else if (dentry != ctx->dentry) {
2177 ctx->dentry = dget(dentry);
2179 nfs_set_verifier(dentry,
2180 nfs_save_change_attribute(opendata->dir->d_inode));
2183 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2188 if (dentry->d_inode == state->inode) {
2189 nfs_inode_attach_open_context(ctx);
2190 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2191 nfs4_schedule_stateid_recovery(server, state);
2198 * Returns a referenced nfs4_state
2200 static int _nfs4_do_open(struct inode *dir,
2201 struct nfs_open_context *ctx,
2203 struct iattr *sattr,
2204 struct nfs4_label *label,
2207 struct nfs4_state_owner *sp;
2208 struct nfs4_state *state = NULL;
2209 struct nfs_server *server = NFS_SERVER(dir);
2210 struct nfs4_opendata *opendata;
2211 struct dentry *dentry = ctx->dentry;
2212 struct rpc_cred *cred = ctx->cred;
2213 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2214 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
2215 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
2216 struct nfs4_label *olabel = NULL;
2219 /* Protect against reboot recovery conflicts */
2221 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2223 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2226 status = nfs4_recover_expired_lease(server);
2228 goto err_put_state_owner;
2229 if (dentry->d_inode != NULL)
2230 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
2232 if (dentry->d_inode)
2233 claim = NFS4_OPEN_CLAIM_FH;
2234 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
2235 label, claim, GFP_KERNEL);
2236 if (opendata == NULL)
2237 goto err_put_state_owner;
2240 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2241 if (IS_ERR(olabel)) {
2242 status = PTR_ERR(olabel);
2243 goto err_opendata_put;
2247 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2248 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2249 if (!opendata->f_attr.mdsthreshold)
2250 goto err_free_label;
2251 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
2253 if (dentry->d_inode != NULL)
2254 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
2256 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
2258 goto err_free_label;
2261 if ((opendata->o_arg.open_flags & O_EXCL) &&
2262 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
2263 nfs4_exclusive_attrset(opendata, sattr);
2265 nfs_fattr_init(opendata->o_res.f_attr);
2266 status = nfs4_do_setattr(state->inode, cred,
2267 opendata->o_res.f_attr, sattr,
2268 state, label, olabel);
2270 nfs_setattr_update_inode(state->inode, sattr);
2271 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2272 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2275 if (opendata->file_created)
2276 *opened |= FILE_CREATED;
2278 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2279 *ctx_th = opendata->f_attr.mdsthreshold;
2281 kfree(opendata->f_attr.mdsthreshold);
2282 opendata->f_attr.mdsthreshold = NULL;
2284 nfs4_label_free(olabel);
2286 nfs4_opendata_put(opendata);
2287 nfs4_put_state_owner(sp);
2290 nfs4_label_free(olabel);
2292 kfree(opendata->f_attr.mdsthreshold);
2293 nfs4_opendata_put(opendata);
2294 err_put_state_owner:
2295 nfs4_put_state_owner(sp);
2301 static struct nfs4_state *nfs4_do_open(struct inode *dir,
2302 struct nfs_open_context *ctx,
2304 struct iattr *sattr,
2305 struct nfs4_label *label,
2308 struct nfs_server *server = NFS_SERVER(dir);
2309 struct nfs4_exception exception = { };
2310 struct nfs4_state *res;
2314 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
2316 trace_nfs4_open_file(ctx, flags, status);
2319 /* NOTE: BAD_SEQID means the server and client disagree about the
2320 * book-keeping w.r.t. state-changing operations
2321 * (OPEN/CLOSE/LOCK/LOCKU...)
2322 * It is actually a sign of a bug on the client or on the server.
2324 * If we receive a BAD_SEQID error in the particular case of
2325 * doing an OPEN, we assume that nfs_increment_open_seqid() will
2326 * have unhashed the old state_owner for us, and that we can
2327 * therefore safely retry using a new one. We should still warn
2328 * the user though...
2330 if (status == -NFS4ERR_BAD_SEQID) {
2331 pr_warn_ratelimited("NFS: v4 server %s "
2332 " returned a bad sequence-id error!\n",
2333 NFS_SERVER(dir)->nfs_client->cl_hostname);
2334 exception.retry = 1;
2338 * BAD_STATEID on OPEN means that the server cancelled our
2339 * state before it received the OPEN_CONFIRM.
2340 * Recover by retrying the request as per the discussion
2341 * on Page 181 of RFC3530.
2343 if (status == -NFS4ERR_BAD_STATEID) {
2344 exception.retry = 1;
2347 if (status == -EAGAIN) {
2348 /* We must have found a delegation */
2349 exception.retry = 1;
2352 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2354 res = ERR_PTR(nfs4_handle_exception(server,
2355 status, &exception));
2356 } while (exception.retry);
2360 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2361 struct nfs_fattr *fattr, struct iattr *sattr,
2362 struct nfs4_state *state, struct nfs4_label *ilabel,
2363 struct nfs4_label *olabel)
2365 struct nfs_server *server = NFS_SERVER(inode);
2366 struct nfs_setattrargs arg = {
2367 .fh = NFS_FH(inode),
2370 .bitmask = server->attr_bitmask,
2373 struct nfs_setattrres res = {
2378 struct rpc_message msg = {
2379 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2384 unsigned long timestamp = jiffies;
2389 arg.bitmask = nfs4_bitmask(server, ilabel);
2391 arg.bitmask = nfs4_bitmask(server, olabel);
2393 nfs_fattr_init(fattr);
2395 /* Servers should only apply open mode checks for file size changes */
2396 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2397 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2399 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2400 /* Use that stateid */
2401 } else if (truncate && state != NULL) {
2402 struct nfs_lockowner lockowner = {
2403 .l_owner = current->files,
2404 .l_pid = current->tgid,
2406 if (!nfs4_valid_open_stateid(state))
2408 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2409 &lockowner) == -EIO)
2412 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
2414 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2415 if (status == 0 && state != NULL)
2416 renew_lease(server, timestamp);
2420 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2421 struct nfs_fattr *fattr, struct iattr *sattr,
2422 struct nfs4_state *state, struct nfs4_label *ilabel,
2423 struct nfs4_label *olabel)
2425 struct nfs_server *server = NFS_SERVER(inode);
2426 struct nfs4_exception exception = {
2432 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
2433 trace_nfs4_setattr(inode, err);
2435 case -NFS4ERR_OPENMODE:
2436 if (!(sattr->ia_valid & ATTR_SIZE)) {
2437 pr_warn_once("NFSv4: server %s is incorrectly "
2438 "applying open mode checks to "
2439 "a SETATTR that is not "
2440 "changing file size.\n",
2441 server->nfs_client->cl_hostname);
2443 if (state && !(state->state & FMODE_WRITE)) {
2445 if (sattr->ia_valid & ATTR_OPEN)
2450 err = nfs4_handle_exception(server, err, &exception);
2451 } while (exception.retry);
2456 struct nfs4_closedata {
2457 struct inode *inode;
2458 struct nfs4_state *state;
2459 struct nfs_closeargs arg;
2460 struct nfs_closeres res;
2461 struct nfs_fattr fattr;
2462 unsigned long timestamp;
2467 static void nfs4_free_closedata(void *data)
2469 struct nfs4_closedata *calldata = data;
2470 struct nfs4_state_owner *sp = calldata->state->owner;
2471 struct super_block *sb = calldata->state->inode->i_sb;
2474 pnfs_roc_release(calldata->state->inode);
2475 nfs4_put_open_state(calldata->state);
2476 nfs_free_seqid(calldata->arg.seqid);
2477 nfs4_put_state_owner(sp);
2478 nfs_sb_deactive(sb);
2482 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2485 spin_lock(&state->owner->so_lock);
2486 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2487 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2489 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2492 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2495 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2496 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2497 clear_bit(NFS_OPEN_STATE, &state->flags);
2499 spin_unlock(&state->owner->so_lock);
2502 static void nfs4_close_done(struct rpc_task *task, void *data)
2504 struct nfs4_closedata *calldata = data;
2505 struct nfs4_state *state = calldata->state;
2506 struct nfs_server *server = NFS_SERVER(calldata->inode);
2508 dprintk("%s: begin!\n", __func__);
2509 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2511 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
2512 /* hmm. we are done with the inode, and in the process of freeing
2513 * the state_owner. we keep this around to process errors
2515 switch (task->tk_status) {
2518 pnfs_roc_set_barrier(state->inode,
2519 calldata->roc_barrier);
2520 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
2521 renew_lease(server, calldata->timestamp);
2523 case -NFS4ERR_ADMIN_REVOKED:
2524 case -NFS4ERR_STALE_STATEID:
2525 case -NFS4ERR_OLD_STATEID:
2526 case -NFS4ERR_BAD_STATEID:
2527 case -NFS4ERR_EXPIRED:
2528 if (calldata->arg.fmode == 0)
2531 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
2532 rpc_restart_call_prepare(task);
2536 nfs4_close_clear_stateid_flags(state, calldata->arg.fmode);
2538 nfs_release_seqid(calldata->arg.seqid);
2539 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2540 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2543 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2545 struct nfs4_closedata *calldata = data;
2546 struct nfs4_state *state = calldata->state;
2547 struct inode *inode = calldata->inode;
2550 dprintk("%s: begin!\n", __func__);
2551 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2554 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2555 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
2556 spin_lock(&state->owner->so_lock);
2557 /* Calculate the change in open mode */
2558 if (state->n_rdwr == 0) {
2559 if (state->n_rdonly == 0) {
2560 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2561 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2562 calldata->arg.fmode &= ~FMODE_READ;
2564 if (state->n_wronly == 0) {
2565 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2566 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2567 calldata->arg.fmode &= ~FMODE_WRITE;
2570 if (!nfs4_valid_open_stateid(state))
2572 spin_unlock(&state->owner->so_lock);
2575 /* Note: exit _without_ calling nfs4_close_done */
2579 if (calldata->arg.fmode == 0) {
2580 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2581 if (calldata->roc &&
2582 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2583 nfs_release_seqid(calldata->arg.seqid);
2588 nfs_fattr_init(calldata->res.fattr);
2589 calldata->timestamp = jiffies;
2590 if (nfs4_setup_sequence(NFS_SERVER(inode),
2591 &calldata->arg.seq_args,
2592 &calldata->res.seq_res,
2594 nfs_release_seqid(calldata->arg.seqid);
2595 dprintk("%s: done!\n", __func__);
2598 task->tk_action = NULL;
2600 nfs4_sequence_done(task, &calldata->res.seq_res);
2603 static const struct rpc_call_ops nfs4_close_ops = {
2604 .rpc_call_prepare = nfs4_close_prepare,
2605 .rpc_call_done = nfs4_close_done,
2606 .rpc_release = nfs4_free_closedata,
2610 * It is possible for data to be read/written from a mem-mapped file
2611 * after the sys_close call (which hits the vfs layer as a flush).
2612 * This means that we can't safely call nfsv4 close on a file until
2613 * the inode is cleared. This in turn means that we are not good
2614 * NFSv4 citizens - we do not indicate to the server to update the file's
2615 * share state even when we are done with one of the three share
2616 * stateid's in the inode.
2618 * NOTE: Caller must be holding the sp->so_owner semaphore!
2620 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
2622 struct nfs_server *server = NFS_SERVER(state->inode);
2623 struct nfs4_closedata *calldata;
2624 struct nfs4_state_owner *sp = state->owner;
2625 struct rpc_task *task;
2626 struct rpc_message msg = {
2627 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2628 .rpc_cred = state->owner->so_cred,
2630 struct rpc_task_setup task_setup_data = {
2631 .rpc_client = server->client,
2632 .rpc_message = &msg,
2633 .callback_ops = &nfs4_close_ops,
2634 .workqueue = nfsiod_workqueue,
2635 .flags = RPC_TASK_ASYNC,
2637 int status = -ENOMEM;
2639 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2640 &task_setup_data.rpc_client, &msg);
2642 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2643 if (calldata == NULL)
2645 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2646 calldata->inode = state->inode;
2647 calldata->state = state;
2648 calldata->arg.fh = NFS_FH(state->inode);
2649 calldata->arg.stateid = &state->open_stateid;
2650 /* Serialization for the sequence id */
2651 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2652 if (calldata->arg.seqid == NULL)
2653 goto out_free_calldata;
2654 calldata->arg.fmode = 0;
2655 calldata->arg.bitmask = server->cache_consistency_bitmask;
2656 calldata->res.fattr = &calldata->fattr;
2657 calldata->res.seqid = calldata->arg.seqid;
2658 calldata->res.server = server;
2659 calldata->roc = pnfs_roc(state->inode);
2660 nfs_sb_active(calldata->inode->i_sb);
2662 msg.rpc_argp = &calldata->arg;
2663 msg.rpc_resp = &calldata->res;
2664 task_setup_data.callback_data = calldata;
2665 task = rpc_run_task(&task_setup_data);
2667 return PTR_ERR(task);
2670 status = rpc_wait_for_completion_task(task);
2676 nfs4_put_open_state(state);
2677 nfs4_put_state_owner(sp);
2681 static struct inode *
2682 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2683 int open_flags, struct iattr *attr, int *opened)
2685 struct nfs4_state *state;
2686 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2688 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
2690 /* Protect against concurrent sillydeletes */
2691 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
2693 nfs4_label_release_security(label);
2696 return ERR_CAST(state);
2697 return state->inode;
2700 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2702 if (ctx->state == NULL)
2705 nfs4_close_sync(ctx->state, ctx->mode);
2707 nfs4_close_state(ctx->state, ctx->mode);
2710 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2711 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
2712 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_CHANGE_SECURITY_LABEL - 1UL)
2714 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2716 struct nfs4_server_caps_arg args = {
2719 struct nfs4_server_caps_res res = {};
2720 struct rpc_message msg = {
2721 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2727 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2729 /* Sanity check the server answers */
2730 switch (server->nfs_client->cl_minorversion) {
2732 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2733 res.attr_bitmask[2] = 0;
2736 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2739 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2741 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2742 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2743 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2744 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2745 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2746 NFS_CAP_CTIME|NFS_CAP_MTIME|
2747 NFS_CAP_SECURITY_LABEL);
2748 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2749 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2750 server->caps |= NFS_CAP_ACLS;
2751 if (res.has_links != 0)
2752 server->caps |= NFS_CAP_HARDLINKS;
2753 if (res.has_symlinks != 0)
2754 server->caps |= NFS_CAP_SYMLINKS;
2755 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2756 server->caps |= NFS_CAP_FILEID;
2757 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2758 server->caps |= NFS_CAP_MODE;
2759 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2760 server->caps |= NFS_CAP_NLINK;
2761 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2762 server->caps |= NFS_CAP_OWNER;
2763 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2764 server->caps |= NFS_CAP_OWNER_GROUP;
2765 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2766 server->caps |= NFS_CAP_ATIME;
2767 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2768 server->caps |= NFS_CAP_CTIME;
2769 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2770 server->caps |= NFS_CAP_MTIME;
2771 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
2772 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2773 server->caps |= NFS_CAP_SECURITY_LABEL;
2775 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2776 sizeof(server->attr_bitmask));
2777 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2779 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2780 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2781 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2782 server->cache_consistency_bitmask[2] = 0;
2783 server->acl_bitmask = res.acl_bitmask;
2784 server->fh_expire_type = res.fh_expire_type;
2790 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2792 struct nfs4_exception exception = { };
2795 err = nfs4_handle_exception(server,
2796 _nfs4_server_capabilities(server, fhandle),
2798 } while (exception.retry);
2802 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2803 struct nfs_fsinfo *info)
2806 struct nfs4_lookup_root_arg args = {
2809 struct nfs4_lookup_res res = {
2811 .fattr = info->fattr,
2814 struct rpc_message msg = {
2815 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2820 bitmask[0] = nfs4_fattr_bitmap[0];
2821 bitmask[1] = nfs4_fattr_bitmap[1];
2823 * Process the label in the upcoming getfattr
2825 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2827 nfs_fattr_init(info->fattr);
2828 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2831 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2832 struct nfs_fsinfo *info)
2834 struct nfs4_exception exception = { };
2837 err = _nfs4_lookup_root(server, fhandle, info);
2838 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
2841 case -NFS4ERR_WRONGSEC:
2844 err = nfs4_handle_exception(server, err, &exception);
2846 } while (exception.retry);
2851 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2852 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2854 struct rpc_auth_create_args auth_args = {
2855 .pseudoflavor = flavor,
2857 struct rpc_auth *auth;
2860 auth = rpcauth_create(&auth_args, server->client);
2865 ret = nfs4_lookup_root(server, fhandle, info);
2871 * Retry pseudoroot lookup with various security flavors. We do this when:
2873 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2874 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2876 * Returns zero on success, or a negative NFS4ERR value, or a
2877 * negative errno value.
2879 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2880 struct nfs_fsinfo *info)
2882 /* Per 3530bis 15.33.5 */
2883 static const rpc_authflavor_t flav_array[] = {
2887 RPC_AUTH_UNIX, /* courtesy */
2890 int status = -EPERM;
2893 if (server->auth_info.flavor_len > 0) {
2894 /* try each flavor specified by user */
2895 for (i = 0; i < server->auth_info.flavor_len; i++) {
2896 status = nfs4_lookup_root_sec(server, fhandle, info,
2897 server->auth_info.flavors[i]);
2898 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2903 /* no flavors specified by user, try default list */
2904 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
2905 status = nfs4_lookup_root_sec(server, fhandle, info,
2907 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2914 * -EACCESS could mean that the user doesn't have correct permissions
2915 * to access the mount. It could also mean that we tried to mount
2916 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2917 * existing mount programs don't handle -EACCES very well so it should
2918 * be mapped to -EPERM instead.
2920 if (status == -EACCES)
2925 static int nfs4_do_find_root_sec(struct nfs_server *server,
2926 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2928 int mv = server->nfs_client->cl_minorversion;
2929 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2933 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2934 * @server: initialized nfs_server handle
2935 * @fhandle: we fill in the pseudo-fs root file handle
2936 * @info: we fill in an FSINFO struct
2937 * @auth_probe: probe the auth flavours
2939 * Returns zero on success, or a negative errno.
2941 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2942 struct nfs_fsinfo *info,
2947 switch (auth_probe) {
2949 status = nfs4_lookup_root(server, fhandle, info);
2950 if (status != -NFS4ERR_WRONGSEC)
2953 status = nfs4_do_find_root_sec(server, fhandle, info);
2957 status = nfs4_server_capabilities(server, fhandle);
2959 status = nfs4_do_fsinfo(server, fhandle, info);
2961 return nfs4_map_errors(status);
2964 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2965 struct nfs_fsinfo *info)
2968 struct nfs_fattr *fattr = info->fattr;
2969 struct nfs4_label *label = NULL;
2971 error = nfs4_server_capabilities(server, mntfh);
2973 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2977 label = nfs4_label_alloc(server, GFP_KERNEL);
2979 return PTR_ERR(label);
2981 error = nfs4_proc_getattr(server, mntfh, fattr, label);
2983 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2984 goto err_free_label;
2987 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2988 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2989 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2992 nfs4_label_free(label);
2998 * Get locations and (maybe) other attributes of a referral.
2999 * Note that we'll actually follow the referral later when
3000 * we detect fsid mismatch in inode revalidation
3002 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3003 const struct qstr *name, struct nfs_fattr *fattr,
3004 struct nfs_fh *fhandle)
3006 int status = -ENOMEM;
3007 struct page *page = NULL;
3008 struct nfs4_fs_locations *locations = NULL;
3010 page = alloc_page(GFP_KERNEL);
3013 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3014 if (locations == NULL)
3017 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
3022 * If the fsid didn't change, this is a migration event, not a
3023 * referral. Cause us to drop into the exception handler, which
3024 * will kick off migration recovery.
3026 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3027 dprintk("%s: server did not return a different fsid for"
3028 " a referral at %s\n", __func__, name->name);
3029 status = -NFS4ERR_MOVED;
3032 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3033 nfs_fixup_referral_attributes(&locations->fattr);
3035 /* replace the lookup nfs_fattr with the locations nfs_fattr */
3036 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
3037 memset(fhandle, 0, sizeof(struct nfs_fh));
3045 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3046 struct nfs_fattr *fattr, struct nfs4_label *label)
3048 struct nfs4_getattr_arg args = {
3050 .bitmask = server->attr_bitmask,
3052 struct nfs4_getattr_res res = {
3057 struct rpc_message msg = {
3058 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3063 args.bitmask = nfs4_bitmask(server, label);
3065 nfs_fattr_init(fattr);
3066 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3069 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3070 struct nfs_fattr *fattr, struct nfs4_label *label)
3072 struct nfs4_exception exception = { };
3075 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3076 trace_nfs4_getattr(server, fhandle, fattr, err);
3077 err = nfs4_handle_exception(server, err,
3079 } while (exception.retry);
3084 * The file is not closed if it is opened due to the a request to change
3085 * the size of the file. The open call will not be needed once the
3086 * VFS layer lookup-intents are implemented.
3088 * Close is called when the inode is destroyed.
3089 * If we haven't opened the file for O_WRONLY, we
3090 * need to in the size_change case to obtain a stateid.
3093 * Because OPEN is always done by name in nfsv4, it is
3094 * possible that we opened a different file by the same
3095 * name. We can recognize this race condition, but we
3096 * can't do anything about it besides returning an error.
3098 * This will be fixed with VFS changes (lookup-intent).
3101 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3102 struct iattr *sattr)
3104 struct inode *inode = dentry->d_inode;
3105 struct rpc_cred *cred = NULL;
3106 struct nfs4_state *state = NULL;
3107 struct nfs4_label *label = NULL;
3110 if (pnfs_ld_layoutret_on_setattr(inode))
3111 pnfs_commit_and_return_layout(inode);
3113 nfs_fattr_init(fattr);
3115 /* Deal with open(O_TRUNC) */
3116 if (sattr->ia_valid & ATTR_OPEN)
3117 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
3119 /* Optimization: if the end result is no change, don't RPC */
3120 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
3123 /* Search for an existing open(O_WRITE) file */
3124 if (sattr->ia_valid & ATTR_FILE) {
3125 struct nfs_open_context *ctx;
3127 ctx = nfs_file_open_context(sattr->ia_file);
3134 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3136 return PTR_ERR(label);
3138 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
3140 nfs_setattr_update_inode(inode, sattr);
3141 nfs_setsecurity(inode, fattr, label);
3143 nfs4_label_free(label);
3147 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3148 const struct qstr *name, struct nfs_fh *fhandle,
3149 struct nfs_fattr *fattr, struct nfs4_label *label)
3151 struct nfs_server *server = NFS_SERVER(dir);
3153 struct nfs4_lookup_arg args = {
3154 .bitmask = server->attr_bitmask,
3155 .dir_fh = NFS_FH(dir),
3158 struct nfs4_lookup_res res = {
3164 struct rpc_message msg = {
3165 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3170 args.bitmask = nfs4_bitmask(server, label);
3172 nfs_fattr_init(fattr);
3174 dprintk("NFS call lookup %s\n", name->name);
3175 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
3176 dprintk("NFS reply lookup: %d\n", status);
3180 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
3182 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
3183 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
3184 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3188 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3189 struct qstr *name, struct nfs_fh *fhandle,
3190 struct nfs_fattr *fattr, struct nfs4_label *label)
3192 struct nfs4_exception exception = { };
3193 struct rpc_clnt *client = *clnt;
3196 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
3197 trace_nfs4_lookup(dir, name, err);
3199 case -NFS4ERR_BADNAME:
3202 case -NFS4ERR_MOVED:
3203 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
3205 case -NFS4ERR_WRONGSEC:
3207 if (client != *clnt)
3209 client = nfs4_create_sec_client(client, dir, name);
3211 return PTR_ERR(client);
3213 exception.retry = 1;
3216 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3218 } while (exception.retry);
3223 else if (client != *clnt)
3224 rpc_shutdown_client(client);
3229 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
3230 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3231 struct nfs4_label *label)
3234 struct rpc_clnt *client = NFS_CLIENT(dir);
3236 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
3237 if (client != NFS_CLIENT(dir)) {
3238 rpc_shutdown_client(client);
3239 nfs_fixup_secinfo_attributes(fattr);
3245 nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3246 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3248 struct rpc_clnt *client = NFS_CLIENT(dir);
3251 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
3253 return ERR_PTR(status);
3254 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
3257 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3259 struct nfs_server *server = NFS_SERVER(inode);
3260 struct nfs4_accessargs args = {
3261 .fh = NFS_FH(inode),
3262 .bitmask = server->cache_consistency_bitmask,
3264 struct nfs4_accessres res = {
3267 struct rpc_message msg = {
3268 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3271 .rpc_cred = entry->cred,
3273 int mode = entry->mask;
3277 * Determine which access bits we want to ask for...
3279 if (mode & MAY_READ)
3280 args.access |= NFS4_ACCESS_READ;
3281 if (S_ISDIR(inode->i_mode)) {
3282 if (mode & MAY_WRITE)
3283 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3284 if (mode & MAY_EXEC)
3285 args.access |= NFS4_ACCESS_LOOKUP;
3287 if (mode & MAY_WRITE)
3288 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3289 if (mode & MAY_EXEC)
3290 args.access |= NFS4_ACCESS_EXECUTE;
3293 res.fattr = nfs_alloc_fattr();
3294 if (res.fattr == NULL)
3297 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3299 nfs_access_set_mask(entry, res.access);
3300 nfs_refresh_inode(inode, res.fattr);
3302 nfs_free_fattr(res.fattr);
3306 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3308 struct nfs4_exception exception = { };
3311 err = _nfs4_proc_access(inode, entry);
3312 trace_nfs4_access(inode, err);
3313 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3315 } while (exception.retry);
3320 * TODO: For the time being, we don't try to get any attributes
3321 * along with any of the zero-copy operations READ, READDIR,
3324 * In the case of the first three, we want to put the GETATTR
3325 * after the read-type operation -- this is because it is hard
3326 * to predict the length of a GETATTR response in v4, and thus
3327 * align the READ data correctly. This means that the GETATTR
3328 * may end up partially falling into the page cache, and we should
3329 * shift it into the 'tail' of the xdr_buf before processing.
3330 * To do this efficiently, we need to know the total length
3331 * of data received, which doesn't seem to be available outside
3334 * In the case of WRITE, we also want to put the GETATTR after
3335 * the operation -- in this case because we want to make sure
3336 * we get the post-operation mtime and size.
3338 * Both of these changes to the XDR layer would in fact be quite
3339 * minor, but I decided to leave them for a subsequent patch.
3341 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3342 unsigned int pgbase, unsigned int pglen)
3344 struct nfs4_readlink args = {
3345 .fh = NFS_FH(inode),
3350 struct nfs4_readlink_res res;
3351 struct rpc_message msg = {
3352 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3357 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
3360 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3361 unsigned int pgbase, unsigned int pglen)
3363 struct nfs4_exception exception = { };
3366 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3367 trace_nfs4_readlink(inode, err);
3368 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3370 } while (exception.retry);
3375 * This is just for mknod. open(O_CREAT) will always do ->open_context().
3378 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
3381 struct nfs4_label l, *ilabel = NULL;
3382 struct nfs_open_context *ctx;
3383 struct nfs4_state *state;
3387 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3389 return PTR_ERR(ctx);
3391 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3393 sattr->ia_mode &= ~current_umask();
3394 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
3395 if (IS_ERR(state)) {
3396 status = PTR_ERR(state);
3400 nfs4_label_release_security(ilabel);
3401 put_nfs_open_context(ctx);
3405 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3407 struct nfs_server *server = NFS_SERVER(dir);
3408 struct nfs_removeargs args = {
3412 struct nfs_removeres res = {
3415 struct rpc_message msg = {
3416 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3422 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
3424 update_changeattr(dir, &res.cinfo);
3428 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3430 struct nfs4_exception exception = { };
3433 err = _nfs4_proc_remove(dir, name);
3434 trace_nfs4_remove(dir, name, err);
3435 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3437 } while (exception.retry);
3441 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
3443 struct nfs_server *server = NFS_SERVER(dir);
3444 struct nfs_removeargs *args = msg->rpc_argp;
3445 struct nfs_removeres *res = msg->rpc_resp;
3447 res->server = server;
3448 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
3449 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
3451 nfs_fattr_init(res->dir_attr);
3454 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3456 nfs4_setup_sequence(NFS_SERVER(data->dir),
3457 &data->args.seq_args,
3462 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
3464 struct nfs_unlinkdata *data = task->tk_calldata;
3465 struct nfs_removeres *res = &data->res;
3467 if (!nfs4_sequence_done(task, &res->seq_res))
3469 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3471 update_changeattr(dir, &res->cinfo);
3475 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3477 struct nfs_server *server = NFS_SERVER(dir);
3478 struct nfs_renameargs *arg = msg->rpc_argp;
3479 struct nfs_renameres *res = msg->rpc_resp;
3481 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
3482 res->server = server;
3483 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
3486 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3488 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3489 &data->args.seq_args,
3494 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3495 struct inode *new_dir)
3497 struct nfs_renamedata *data = task->tk_calldata;
3498 struct nfs_renameres *res = &data->res;
3500 if (!nfs4_sequence_done(task, &res->seq_res))
3502 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3505 update_changeattr(old_dir, &res->old_cinfo);
3506 update_changeattr(new_dir, &res->new_cinfo);
3510 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3511 struct inode *new_dir, struct qstr *new_name)
3513 struct nfs_server *server = NFS_SERVER(old_dir);
3514 struct nfs_renameargs arg = {
3515 .old_dir = NFS_FH(old_dir),
3516 .new_dir = NFS_FH(new_dir),
3517 .old_name = old_name,
3518 .new_name = new_name,
3520 struct nfs_renameres res = {
3523 struct rpc_message msg = {
3524 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3528 int status = -ENOMEM;
3530 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3532 update_changeattr(old_dir, &res.old_cinfo);
3533 update_changeattr(new_dir, &res.new_cinfo);
3538 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3539 struct inode *new_dir, struct qstr *new_name)
3541 struct nfs4_exception exception = { };
3544 err = _nfs4_proc_rename(old_dir, old_name,
3546 trace_nfs4_rename(old_dir, old_name, new_dir, new_name, err);
3547 err = nfs4_handle_exception(NFS_SERVER(old_dir), err,
3549 } while (exception.retry);
3553 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3555 struct nfs_server *server = NFS_SERVER(inode);
3556 struct nfs4_link_arg arg = {
3557 .fh = NFS_FH(inode),
3558 .dir_fh = NFS_FH(dir),
3560 .bitmask = server->attr_bitmask,
3562 struct nfs4_link_res res = {
3566 struct rpc_message msg = {
3567 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3571 int status = -ENOMEM;
3573 res.fattr = nfs_alloc_fattr();
3574 if (res.fattr == NULL)
3577 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3578 if (IS_ERR(res.label)) {
3579 status = PTR_ERR(res.label);
3582 arg.bitmask = nfs4_bitmask(server, res.label);
3584 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3586 update_changeattr(dir, &res.cinfo);
3587 status = nfs_post_op_update_inode(inode, res.fattr);
3589 nfs_setsecurity(inode, res.fattr, res.label);
3593 nfs4_label_free(res.label);
3596 nfs_free_fattr(res.fattr);
3600 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3602 struct nfs4_exception exception = { };
3605 err = nfs4_handle_exception(NFS_SERVER(inode),
3606 _nfs4_proc_link(inode, dir, name),
3608 } while (exception.retry);
3612 struct nfs4_createdata {
3613 struct rpc_message msg;
3614 struct nfs4_create_arg arg;
3615 struct nfs4_create_res res;
3617 struct nfs_fattr fattr;
3618 struct nfs4_label *label;
3621 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3622 struct qstr *name, struct iattr *sattr, u32 ftype)
3624 struct nfs4_createdata *data;
3626 data = kzalloc(sizeof(*data), GFP_KERNEL);
3628 struct nfs_server *server = NFS_SERVER(dir);
3630 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3631 if (IS_ERR(data->label))
3634 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3635 data->msg.rpc_argp = &data->arg;
3636 data->msg.rpc_resp = &data->res;
3637 data->arg.dir_fh = NFS_FH(dir);
3638 data->arg.server = server;
3639 data->arg.name = name;
3640 data->arg.attrs = sattr;
3641 data->arg.ftype = ftype;
3642 data->arg.bitmask = nfs4_bitmask(server, data->label);
3643 data->res.server = server;
3644 data->res.fh = &data->fh;
3645 data->res.fattr = &data->fattr;
3646 data->res.label = data->label;
3647 nfs_fattr_init(data->res.fattr);
3655 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3657 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3658 &data->arg.seq_args, &data->res.seq_res, 1);
3660 update_changeattr(dir, &data->res.dir_cinfo);
3661 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
3666 static void nfs4_free_createdata(struct nfs4_createdata *data)
3668 nfs4_label_free(data->label);
3672 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3673 struct page *page, unsigned int len, struct iattr *sattr,
3674 struct nfs4_label *label)
3676 struct nfs4_createdata *data;
3677 int status = -ENAMETOOLONG;
3679 if (len > NFS4_MAXPATHLEN)
3683 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3687 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3688 data->arg.u.symlink.pages = &page;
3689 data->arg.u.symlink.len = len;
3690 data->arg.label = label;
3692 status = nfs4_do_create(dir, dentry, data);
3694 nfs4_free_createdata(data);
3699 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3700 struct page *page, unsigned int len, struct iattr *sattr)
3702 struct nfs4_exception exception = { };
3703 struct nfs4_label l, *label = NULL;
3706 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3709 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3710 trace_nfs4_symlink(dir, &dentry->d_name, err);
3711 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3713 } while (exception.retry);
3715 nfs4_label_release_security(label);
3719 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3720 struct iattr *sattr, struct nfs4_label *label)
3722 struct nfs4_createdata *data;
3723 int status = -ENOMEM;
3725 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3729 data->arg.label = label;
3730 status = nfs4_do_create(dir, dentry, data);
3732 nfs4_free_createdata(data);
3737 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3738 struct iattr *sattr)
3740 struct nfs4_exception exception = { };
3741 struct nfs4_label l, *label = NULL;
3744 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3746 sattr->ia_mode &= ~current_umask();
3748 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3749 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3750 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3752 } while (exception.retry);
3753 nfs4_label_release_security(label);
3758 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3759 u64 cookie, struct page **pages, unsigned int count, int plus)
3761 struct inode *dir = dentry->d_inode;
3762 struct nfs4_readdir_arg args = {
3767 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3770 struct nfs4_readdir_res res;
3771 struct rpc_message msg = {
3772 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3779 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3781 (unsigned long long)cookie);
3782 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
3783 res.pgbase = args.pgbase;
3784 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3786 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
3787 status += args.pgbase;
3790 nfs_invalidate_atime(dir);
3792 dprintk("%s: returns %d\n", __func__, status);
3796 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3797 u64 cookie, struct page **pages, unsigned int count, int plus)
3799 struct nfs4_exception exception = { };
3802 err = _nfs4_proc_readdir(dentry, cred, cookie,
3803 pages, count, plus);
3804 trace_nfs4_readdir(dentry->d_inode, err);
3805 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
3807 } while (exception.retry);
3811 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3812 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
3814 struct nfs4_createdata *data;
3815 int mode = sattr->ia_mode;
3816 int status = -ENOMEM;
3818 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3823 data->arg.ftype = NF4FIFO;
3824 else if (S_ISBLK(mode)) {
3825 data->arg.ftype = NF4BLK;
3826 data->arg.u.device.specdata1 = MAJOR(rdev);
3827 data->arg.u.device.specdata2 = MINOR(rdev);
3829 else if (S_ISCHR(mode)) {
3830 data->arg.ftype = NF4CHR;
3831 data->arg.u.device.specdata1 = MAJOR(rdev);
3832 data->arg.u.device.specdata2 = MINOR(rdev);
3833 } else if (!S_ISSOCK(mode)) {
3838 data->arg.label = label;
3839 status = nfs4_do_create(dir, dentry, data);
3841 nfs4_free_createdata(data);
3846 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3847 struct iattr *sattr, dev_t rdev)
3849 struct nfs4_exception exception = { };
3850 struct nfs4_label l, *label = NULL;
3853 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3855 sattr->ia_mode &= ~current_umask();
3857 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3858 trace_nfs4_mknod(dir, &dentry->d_name, err);
3859 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3861 } while (exception.retry);
3863 nfs4_label_release_security(label);
3868 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3869 struct nfs_fsstat *fsstat)
3871 struct nfs4_statfs_arg args = {
3873 .bitmask = server->attr_bitmask,
3875 struct nfs4_statfs_res res = {
3878 struct rpc_message msg = {
3879 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3884 nfs_fattr_init(fsstat->fattr);
3885 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3888 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3890 struct nfs4_exception exception = { };
3893 err = nfs4_handle_exception(server,
3894 _nfs4_proc_statfs(server, fhandle, fsstat),
3896 } while (exception.retry);
3900 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3901 struct nfs_fsinfo *fsinfo)
3903 struct nfs4_fsinfo_arg args = {
3905 .bitmask = server->attr_bitmask,
3907 struct nfs4_fsinfo_res res = {
3910 struct rpc_message msg = {
3911 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3916 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3919 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3921 struct nfs4_exception exception = { };
3922 unsigned long now = jiffies;
3926 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
3927 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
3929 struct nfs_client *clp = server->nfs_client;
3931 spin_lock(&clp->cl_lock);
3932 clp->cl_lease_time = fsinfo->lease_time * HZ;
3933 clp->cl_last_renewal = now;
3934 spin_unlock(&clp->cl_lock);
3937 err = nfs4_handle_exception(server, err, &exception);
3938 } while (exception.retry);
3942 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3946 nfs_fattr_init(fsinfo->fattr);
3947 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
3949 /* block layout checks this! */
3950 server->pnfs_blksize = fsinfo->blksize;
3951 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
3957 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3958 struct nfs_pathconf *pathconf)
3960 struct nfs4_pathconf_arg args = {
3962 .bitmask = server->attr_bitmask,
3964 struct nfs4_pathconf_res res = {
3965 .pathconf = pathconf,
3967 struct rpc_message msg = {
3968 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3973 /* None of the pathconf attributes are mandatory to implement */
3974 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3975 memset(pathconf, 0, sizeof(*pathconf));
3979 nfs_fattr_init(pathconf->fattr);
3980 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3983 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3984 struct nfs_pathconf *pathconf)
3986 struct nfs4_exception exception = { };
3990 err = nfs4_handle_exception(server,
3991 _nfs4_proc_pathconf(server, fhandle, pathconf),
3993 } while (exception.retry);
3997 int nfs4_set_rw_stateid(nfs4_stateid *stateid,
3998 const struct nfs_open_context *ctx,
3999 const struct nfs_lock_context *l_ctx,
4002 const struct nfs_lockowner *lockowner = NULL;
4005 lockowner = &l_ctx->lockowner;
4006 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
4008 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4010 static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4011 const struct nfs_open_context *ctx,
4012 const struct nfs_lock_context *l_ctx,
4015 nfs4_stateid current_stateid;
4017 /* If the current stateid represents a lost lock, then exit */
4018 if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode) == -EIO)
4020 return nfs4_stateid_match(stateid, ¤t_stateid);
4023 static bool nfs4_error_stateid_expired(int err)
4026 case -NFS4ERR_DELEG_REVOKED:
4027 case -NFS4ERR_ADMIN_REVOKED:
4028 case -NFS4ERR_BAD_STATEID:
4029 case -NFS4ERR_STALE_STATEID:
4030 case -NFS4ERR_OLD_STATEID:
4031 case -NFS4ERR_OPENMODE:
4032 case -NFS4ERR_EXPIRED:
4038 void __nfs4_read_done_cb(struct nfs_read_data *data)
4040 nfs_invalidate_atime(data->header->inode);
4043 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
4045 struct nfs_server *server = NFS_SERVER(data->header->inode);
4047 trace_nfs4_read(data, task->tk_status);
4048 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
4049 rpc_restart_call_prepare(task);
4053 __nfs4_read_done_cb(data);
4054 if (task->tk_status > 0)
4055 renew_lease(server, data->timestamp);
4059 static bool nfs4_read_stateid_changed(struct rpc_task *task,
4060 struct nfs_readargs *args)
4063 if (!nfs4_error_stateid_expired(task->tk_status) ||
4064 nfs4_stateid_is_current(&args->stateid,
4069 rpc_restart_call_prepare(task);
4073 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
4076 dprintk("--> %s\n", __func__);
4078 if (!nfs4_sequence_done(task, &data->res.seq_res))
4080 if (nfs4_read_stateid_changed(task, &data->args))
4082 return data->read_done_cb ? data->read_done_cb(task, data) :
4083 nfs4_read_done_cb(task, data);
4086 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
4088 data->timestamp = jiffies;
4089 data->read_done_cb = nfs4_read_done_cb;
4090 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
4091 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
4094 static int nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
4096 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
4097 &data->args.seq_args,
4101 if (nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4102 data->args.lock_context, FMODE_READ) == -EIO)
4104 if (unlikely(test_bit(NFS_CONTEXT_BAD, &data->args.context->flags)))
4109 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
4111 struct inode *inode = data->header->inode;
4113 trace_nfs4_write(data, task->tk_status);
4114 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
4115 rpc_restart_call_prepare(task);
4118 if (task->tk_status >= 0) {
4119 renew_lease(NFS_SERVER(inode), data->timestamp);
4120 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4125 static bool nfs4_write_stateid_changed(struct rpc_task *task,
4126 struct nfs_writeargs *args)
4129 if (!nfs4_error_stateid_expired(task->tk_status) ||
4130 nfs4_stateid_is_current(&args->stateid,
4135 rpc_restart_call_prepare(task);
4139 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
4141 if (!nfs4_sequence_done(task, &data->res.seq_res))
4143 if (nfs4_write_stateid_changed(task, &data->args))
4145 return data->write_done_cb ? data->write_done_cb(task, data) :
4146 nfs4_write_done_cb(task, data);
4150 bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
4152 const struct nfs_pgio_header *hdr = data->header;
4154 /* Don't request attributes for pNFS or O_DIRECT writes */
4155 if (data->ds_clp != NULL || hdr->dreq != NULL)
4157 /* Otherwise, request attributes if and only if we don't hold
4160 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
4163 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
4165 struct nfs_server *server = NFS_SERVER(data->header->inode);
4167 if (!nfs4_write_need_cache_consistency_data(data)) {
4168 data->args.bitmask = NULL;
4169 data->res.fattr = NULL;
4171 data->args.bitmask = server->cache_consistency_bitmask;
4173 if (!data->write_done_cb)
4174 data->write_done_cb = nfs4_write_done_cb;
4175 data->res.server = server;
4176 data->timestamp = jiffies;
4178 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
4179 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4182 static int nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
4184 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
4185 &data->args.seq_args,
4189 if (nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4190 data->args.lock_context, FMODE_WRITE) == -EIO)
4192 if (unlikely(test_bit(NFS_CONTEXT_BAD, &data->args.context->flags)))
4197 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
4199 nfs4_setup_sequence(NFS_SERVER(data->inode),
4200 &data->args.seq_args,
4205 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
4207 struct inode *inode = data->inode;
4209 trace_nfs4_commit(data, task->tk_status);
4210 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
4211 rpc_restart_call_prepare(task);
4217 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
4219 if (!nfs4_sequence_done(task, &data->res.seq_res))
4221 return data->commit_done_cb(task, data);
4224 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
4226 struct nfs_server *server = NFS_SERVER(data->inode);
4228 if (data->commit_done_cb == NULL)
4229 data->commit_done_cb = nfs4_commit_done_cb;
4230 data->res.server = server;
4231 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
4232 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4235 struct nfs4_renewdata {
4236 struct nfs_client *client;
4237 unsigned long timestamp;
4241 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4242 * standalone procedure for queueing an asynchronous RENEW.
4244 static void nfs4_renew_release(void *calldata)
4246 struct nfs4_renewdata *data = calldata;
4247 struct nfs_client *clp = data->client;
4249 if (atomic_read(&clp->cl_count) > 1)
4250 nfs4_schedule_state_renewal(clp);
4251 nfs_put_client(clp);
4255 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
4257 struct nfs4_renewdata *data = calldata;
4258 struct nfs_client *clp = data->client;
4259 unsigned long timestamp = data->timestamp;
4261 trace_nfs4_renew_async(clp, task->tk_status);
4262 switch (task->tk_status) {
4265 case -NFS4ERR_LEASE_MOVED:
4266 nfs4_schedule_lease_moved_recovery(clp);
4269 /* Unless we're shutting down, schedule state recovery! */
4270 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4272 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
4273 nfs4_schedule_lease_recovery(clp);
4276 nfs4_schedule_path_down_recovery(clp);
4278 do_renew_lease(clp, timestamp);
4281 static const struct rpc_call_ops nfs4_renew_ops = {
4282 .rpc_call_done = nfs4_renew_done,
4283 .rpc_release = nfs4_renew_release,
4286 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
4288 struct rpc_message msg = {
4289 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4293 struct nfs4_renewdata *data;
4295 if (renew_flags == 0)
4297 if (!atomic_inc_not_zero(&clp->cl_count))
4299 data = kmalloc(sizeof(*data), GFP_NOFS);
4303 data->timestamp = jiffies;
4304 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
4305 &nfs4_renew_ops, data);
4308 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
4310 struct rpc_message msg = {
4311 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4315 unsigned long now = jiffies;
4318 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4321 do_renew_lease(clp, now);
4325 static inline int nfs4_server_supports_acls(struct nfs_server *server)
4327 return server->caps & NFS_CAP_ACLS;
4330 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4331 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
4334 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
4336 static int buf_to_pages_noslab(const void *buf, size_t buflen,
4337 struct page **pages, unsigned int *pgbase)
4339 struct page *newpage, **spages;
4345 len = min_t(size_t, PAGE_SIZE, buflen);
4346 newpage = alloc_page(GFP_KERNEL);
4348 if (newpage == NULL)
4350 memcpy(page_address(newpage), buf, len);
4355 } while (buflen != 0);
4361 __free_page(spages[rc-1]);
4365 struct nfs4_cached_acl {
4371 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4373 struct nfs_inode *nfsi = NFS_I(inode);
4375 spin_lock(&inode->i_lock);
4376 kfree(nfsi->nfs4_acl);
4377 nfsi->nfs4_acl = acl;
4378 spin_unlock(&inode->i_lock);
4381 static void nfs4_zap_acl_attr(struct inode *inode)
4383 nfs4_set_cached_acl(inode, NULL);
4386 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4388 struct nfs_inode *nfsi = NFS_I(inode);
4389 struct nfs4_cached_acl *acl;
4392 spin_lock(&inode->i_lock);
4393 acl = nfsi->nfs4_acl;
4396 if (buf == NULL) /* user is just asking for length */
4398 if (acl->cached == 0)
4400 ret = -ERANGE; /* see getxattr(2) man page */
4401 if (acl->len > buflen)
4403 memcpy(buf, acl->data, acl->len);
4407 spin_unlock(&inode->i_lock);
4411 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
4413 struct nfs4_cached_acl *acl;
4414 size_t buflen = sizeof(*acl) + acl_len;
4416 if (buflen <= PAGE_SIZE) {
4417 acl = kmalloc(buflen, GFP_KERNEL);
4421 _copy_from_pages(acl->data, pages, pgbase, acl_len);
4423 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4430 nfs4_set_cached_acl(inode, acl);
4434 * The getxattr API returns the required buffer length when called with a
4435 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4436 * the required buf. On a NULL buf, we send a page of data to the server
4437 * guessing that the ACL request can be serviced by a page. If so, we cache
4438 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4439 * the cache. If not so, we throw away the page, and cache the required
4440 * length. The next getxattr call will then produce another round trip to
4441 * the server, this time with the input buf of the required size.
4443 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4445 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
4446 struct nfs_getaclargs args = {
4447 .fh = NFS_FH(inode),
4451 struct nfs_getaclres res = {
4454 struct rpc_message msg = {
4455 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4459 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4460 int ret = -ENOMEM, i;
4462 /* As long as we're doing a round trip to the server anyway,
4463 * let's be prepared for a page of acl data. */
4466 if (npages > ARRAY_SIZE(pages))
4469 for (i = 0; i < npages; i++) {
4470 pages[i] = alloc_page(GFP_KERNEL);
4475 /* for decoding across pages */
4476 res.acl_scratch = alloc_page(GFP_KERNEL);
4477 if (!res.acl_scratch)
4480 args.acl_len = npages * PAGE_SIZE;
4481 args.acl_pgbase = 0;
4483 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
4484 __func__, buf, buflen, npages, args.acl_len);
4485 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4486 &msg, &args.seq_args, &res.seq_res, 0);
4490 /* Handle the case where the passed-in buffer is too short */
4491 if (res.acl_flags & NFS4_ACL_TRUNC) {
4492 /* Did the user only issue a request for the acl length? */
4498 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
4500 if (res.acl_len > buflen) {
4504 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
4509 for (i = 0; i < npages; i++)
4511 __free_page(pages[i]);
4512 if (res.acl_scratch)
4513 __free_page(res.acl_scratch);
4517 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4519 struct nfs4_exception exception = { };
4522 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4523 trace_nfs4_get_acl(inode, ret);
4526 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4527 } while (exception.retry);
4531 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4533 struct nfs_server *server = NFS_SERVER(inode);
4536 if (!nfs4_server_supports_acls(server))
4538 ret = nfs_revalidate_inode(server, inode);
4541 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4542 nfs_zap_acl_cache(inode);
4543 ret = nfs4_read_cached_acl(inode, buf, buflen);
4545 /* -ENOENT is returned if there is no ACL or if there is an ACL
4546 * but no cached acl data, just the acl length */
4548 return nfs4_get_acl_uncached(inode, buf, buflen);
4551 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4553 struct nfs_server *server = NFS_SERVER(inode);
4554 struct page *pages[NFS4ACL_MAXPAGES];
4555 struct nfs_setaclargs arg = {
4556 .fh = NFS_FH(inode),
4560 struct nfs_setaclres res;
4561 struct rpc_message msg = {
4562 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4566 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4569 if (!nfs4_server_supports_acls(server))
4571 if (npages > ARRAY_SIZE(pages))
4573 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4576 nfs4_inode_return_delegation(inode);
4577 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4580 * Free each page after tx, so the only ref left is
4581 * held by the network stack
4584 put_page(pages[i-1]);
4587 * Acl update can result in inode attribute update.
4588 * so mark the attribute cache invalid.
4590 spin_lock(&inode->i_lock);
4591 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4592 spin_unlock(&inode->i_lock);
4593 nfs_access_zap_cache(inode);
4594 nfs_zap_acl_cache(inode);
4598 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4600 struct nfs4_exception exception = { };
4603 err = __nfs4_proc_set_acl(inode, buf, buflen);
4604 trace_nfs4_set_acl(inode, err);
4605 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4607 } while (exception.retry);
4611 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
4612 static int _nfs4_get_security_label(struct inode *inode, void *buf,
4615 struct nfs_server *server = NFS_SERVER(inode);
4616 struct nfs_fattr fattr;
4617 struct nfs4_label label = {0, 0, buflen, buf};
4619 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4620 struct nfs4_getattr_arg arg = {
4621 .fh = NFS_FH(inode),
4624 struct nfs4_getattr_res res = {
4629 struct rpc_message msg = {
4630 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4636 nfs_fattr_init(&fattr);
4638 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
4641 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4643 if (buflen < label.len)
4648 static int nfs4_get_security_label(struct inode *inode, void *buf,
4651 struct nfs4_exception exception = { };
4654 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4658 err = _nfs4_get_security_label(inode, buf, buflen);
4659 trace_nfs4_get_security_label(inode, err);
4660 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4662 } while (exception.retry);
4666 static int _nfs4_do_set_security_label(struct inode *inode,
4667 struct nfs4_label *ilabel,
4668 struct nfs_fattr *fattr,
4669 struct nfs4_label *olabel)
4672 struct iattr sattr = {0};
4673 struct nfs_server *server = NFS_SERVER(inode);
4674 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4675 struct nfs_setattrargs arg = {
4676 .fh = NFS_FH(inode),
4682 struct nfs_setattrres res = {
4687 struct rpc_message msg = {
4688 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
4694 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
4696 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4698 dprintk("%s failed: %d\n", __func__, status);
4703 static int nfs4_do_set_security_label(struct inode *inode,
4704 struct nfs4_label *ilabel,
4705 struct nfs_fattr *fattr,
4706 struct nfs4_label *olabel)
4708 struct nfs4_exception exception = { };
4712 err = _nfs4_do_set_security_label(inode, ilabel,
4714 trace_nfs4_set_security_label(inode, err);
4715 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4717 } while (exception.retry);
4722 nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4724 struct nfs4_label ilabel, *olabel = NULL;
4725 struct nfs_fattr fattr;
4726 struct rpc_cred *cred;
4727 struct inode *inode = dentry->d_inode;
4730 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4733 nfs_fattr_init(&fattr);
4737 ilabel.label = (char *)buf;
4738 ilabel.len = buflen;
4740 cred = rpc_lookup_cred();
4742 return PTR_ERR(cred);
4744 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4745 if (IS_ERR(olabel)) {
4746 status = -PTR_ERR(olabel);
4750 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4752 nfs_setsecurity(inode, &fattr, olabel);
4754 nfs4_label_free(olabel);
4759 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4763 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
4765 struct nfs_client *clp = server->nfs_client;
4767 if (task->tk_status >= 0)
4769 switch(task->tk_status) {
4770 case -NFS4ERR_DELEG_REVOKED:
4771 case -NFS4ERR_ADMIN_REVOKED:
4772 case -NFS4ERR_BAD_STATEID:
4775 nfs_remove_bad_delegation(state->inode);
4776 case -NFS4ERR_OPENMODE:
4779 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4780 goto recovery_failed;
4781 goto wait_on_recovery;
4782 case -NFS4ERR_EXPIRED:
4783 if (state != NULL) {
4784 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4785 goto recovery_failed;
4787 case -NFS4ERR_STALE_STATEID:
4788 case -NFS4ERR_STALE_CLIENTID:
4789 nfs4_schedule_lease_recovery(clp);
4790 goto wait_on_recovery;
4791 case -NFS4ERR_MOVED:
4792 if (nfs4_schedule_migration_recovery(server) < 0)
4793 goto recovery_failed;
4794 goto wait_on_recovery;
4795 case -NFS4ERR_LEASE_MOVED:
4796 nfs4_schedule_lease_moved_recovery(clp);
4797 goto wait_on_recovery;
4798 #if defined(CONFIG_NFS_V4_1)
4799 case -NFS4ERR_BADSESSION:
4800 case -NFS4ERR_BADSLOT:
4801 case -NFS4ERR_BAD_HIGH_SLOT:
4802 case -NFS4ERR_DEADSESSION:
4803 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4804 case -NFS4ERR_SEQ_FALSE_RETRY:
4805 case -NFS4ERR_SEQ_MISORDERED:
4806 dprintk("%s ERROR %d, Reset session\n", __func__,
4808 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4809 goto wait_on_recovery;
4810 #endif /* CONFIG_NFS_V4_1 */
4811 case -NFS4ERR_DELAY:
4812 nfs_inc_server_stats(server, NFSIOS_DELAY);
4813 case -NFS4ERR_GRACE:
4814 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4815 case -NFS4ERR_RETRY_UNCACHED_REP:
4816 case -NFS4ERR_OLD_STATEID:
4819 task->tk_status = nfs4_map_errors(task->tk_status);
4822 task->tk_status = -EIO;
4825 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
4826 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4827 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4828 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4829 goto recovery_failed;
4831 task->tk_status = 0;
4835 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4836 nfs4_verifier *bootverf)
4840 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4841 /* An impossible timestamp guarantees this value
4842 * will never match a generated boot time. */
4844 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
4846 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4847 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4848 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
4850 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4854 nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4855 char *buf, size_t len)
4857 unsigned int result;
4860 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4862 rpc_peeraddr2str(clp->cl_rpcclient,
4864 rpc_peeraddr2str(clp->cl_rpcclient,
4865 RPC_DISPLAY_PROTO));
4871 nfs4_init_uniform_client_string(const struct nfs_client *clp,
4872 char *buf, size_t len)
4874 const char *nodename = clp->cl_rpcclient->cl_nodename;
4876 if (nfs4_client_id_uniquifier[0] != '\0')
4877 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4878 clp->rpc_ops->version,
4879 clp->cl_minorversion,
4880 nfs4_client_id_uniquifier,
4882 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4883 clp->rpc_ops->version, clp->cl_minorversion,
4888 * nfs4_proc_setclientid - Negotiate client ID
4889 * @clp: state data structure
4890 * @program: RPC program for NFSv4 callback service
4891 * @port: IP port number for NFS4 callback service
4892 * @cred: RPC credential to use for this call
4893 * @res: where to place the result
4895 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4897 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4898 unsigned short port, struct rpc_cred *cred,
4899 struct nfs4_setclientid_res *res)
4901 nfs4_verifier sc_verifier;
4902 struct nfs4_setclientid setclientid = {
4903 .sc_verifier = &sc_verifier,
4905 .sc_cb_ident = clp->cl_cb_ident,
4907 struct rpc_message msg = {
4908 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4909 .rpc_argp = &setclientid,
4915 /* nfs_client_id4 */
4916 nfs4_init_boot_verifier(clp, &sc_verifier);
4917 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4918 setclientid.sc_name_len =
4919 nfs4_init_uniform_client_string(clp,
4920 setclientid.sc_name,
4921 sizeof(setclientid.sc_name));
4923 setclientid.sc_name_len =
4924 nfs4_init_nonuniform_client_string(clp,
4925 setclientid.sc_name,
4926 sizeof(setclientid.sc_name));
4929 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
4930 sizeof(setclientid.sc_netid), "%s",
4931 rpc_peeraddr2str(clp->cl_rpcclient,
4932 RPC_DISPLAY_NETID));
4934 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
4935 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
4936 clp->cl_ipaddr, port >> 8, port & 255);
4938 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4939 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4940 setclientid.sc_name_len, setclientid.sc_name);
4941 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4942 trace_nfs4_setclientid(clp, status);
4943 dprintk("NFS reply setclientid: %d\n", status);
4948 * nfs4_proc_setclientid_confirm - Confirm client ID
4949 * @clp: state data structure
4950 * @res: result of a previous SETCLIENTID
4951 * @cred: RPC credential to use for this call
4953 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4955 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
4956 struct nfs4_setclientid_res *arg,
4957 struct rpc_cred *cred)
4959 struct rpc_message msg = {
4960 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
4966 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4967 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4969 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4970 trace_nfs4_setclientid_confirm(clp, status);
4971 dprintk("NFS reply setclientid_confirm: %d\n", status);
4975 struct nfs4_delegreturndata {
4976 struct nfs4_delegreturnargs args;
4977 struct nfs4_delegreturnres res;
4979 nfs4_stateid stateid;
4980 unsigned long timestamp;
4981 struct nfs_fattr fattr;
4985 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4987 struct nfs4_delegreturndata *data = calldata;
4989 if (!nfs4_sequence_done(task, &data->res.seq_res))
4992 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
4993 switch (task->tk_status) {
4995 renew_lease(data->res.server, data->timestamp);
4997 case -NFS4ERR_ADMIN_REVOKED:
4998 case -NFS4ERR_DELEG_REVOKED:
4999 case -NFS4ERR_BAD_STATEID:
5000 case -NFS4ERR_OLD_STATEID:
5001 case -NFS4ERR_STALE_STATEID:
5002 case -NFS4ERR_EXPIRED:
5003 task->tk_status = 0;
5006 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
5008 rpc_restart_call_prepare(task);
5012 data->rpc_status = task->tk_status;
5015 static void nfs4_delegreturn_release(void *calldata)
5020 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5022 struct nfs4_delegreturndata *d_data;
5024 d_data = (struct nfs4_delegreturndata *)data;
5026 nfs4_setup_sequence(d_data->res.server,
5027 &d_data->args.seq_args,
5028 &d_data->res.seq_res,
5032 static const struct rpc_call_ops nfs4_delegreturn_ops = {
5033 .rpc_call_prepare = nfs4_delegreturn_prepare,
5034 .rpc_call_done = nfs4_delegreturn_done,
5035 .rpc_release = nfs4_delegreturn_release,
5038 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5040 struct nfs4_delegreturndata *data;
5041 struct nfs_server *server = NFS_SERVER(inode);
5042 struct rpc_task *task;
5043 struct rpc_message msg = {
5044 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5047 struct rpc_task_setup task_setup_data = {
5048 .rpc_client = server->client,
5049 .rpc_message = &msg,
5050 .callback_ops = &nfs4_delegreturn_ops,
5051 .flags = RPC_TASK_ASYNC,
5055 data = kzalloc(sizeof(*data), GFP_NOFS);
5058 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
5059 data->args.fhandle = &data->fh;
5060 data->args.stateid = &data->stateid;
5061 data->args.bitmask = server->cache_consistency_bitmask;
5062 nfs_copy_fh(&data->fh, NFS_FH(inode));
5063 nfs4_stateid_copy(&data->stateid, stateid);
5064 data->res.fattr = &data->fattr;
5065 data->res.server = server;
5066 nfs_fattr_init(data->res.fattr);
5067 data->timestamp = jiffies;
5068 data->rpc_status = 0;
5070 task_setup_data.callback_data = data;
5071 msg.rpc_argp = &data->args;
5072 msg.rpc_resp = &data->res;
5073 task = rpc_run_task(&task_setup_data);
5075 return PTR_ERR(task);
5078 status = nfs4_wait_for_completion_rpc_task(task);
5081 status = data->rpc_status;
5083 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5085 nfs_refresh_inode(inode, &data->fattr);
5091 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5093 struct nfs_server *server = NFS_SERVER(inode);
5094 struct nfs4_exception exception = { };
5097 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
5098 trace_nfs4_delegreturn(inode, err);
5100 case -NFS4ERR_STALE_STATEID:
5101 case -NFS4ERR_EXPIRED:
5105 err = nfs4_handle_exception(server, err, &exception);
5106 } while (exception.retry);
5110 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5111 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5114 * sleep, with exponential backoff, and retry the LOCK operation.
5116 static unsigned long
5117 nfs4_set_lock_task_retry(unsigned long timeout)
5119 freezable_schedule_timeout_killable_unsafe(timeout);
5121 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5122 return NFS4_LOCK_MAXTIMEOUT;
5126 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5128 struct inode *inode = state->inode;
5129 struct nfs_server *server = NFS_SERVER(inode);
5130 struct nfs_client *clp = server->nfs_client;
5131 struct nfs_lockt_args arg = {
5132 .fh = NFS_FH(inode),
5135 struct nfs_lockt_res res = {
5138 struct rpc_message msg = {
5139 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5142 .rpc_cred = state->owner->so_cred,
5144 struct nfs4_lock_state *lsp;
5147 arg.lock_owner.clientid = clp->cl_clientid;
5148 status = nfs4_set_lock_state(state, request);
5151 lsp = request->fl_u.nfs4_fl.owner;
5152 arg.lock_owner.id = lsp->ls_seqid.owner_id;
5153 arg.lock_owner.s_dev = server->s_dev;
5154 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5157 request->fl_type = F_UNLCK;
5159 case -NFS4ERR_DENIED:
5162 request->fl_ops->fl_release_private(request);
5163 request->fl_ops = NULL;
5168 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5170 struct nfs4_exception exception = { };
5174 err = _nfs4_proc_getlk(state, cmd, request);
5175 trace_nfs4_get_lock(request, state, cmd, err);
5176 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
5178 } while (exception.retry);
5182 static int do_vfs_lock(struct file *file, struct file_lock *fl)
5185 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5187 res = posix_lock_file_wait(file, fl);
5190 res = flock_lock_file_wait(file, fl);
5198 struct nfs4_unlockdata {
5199 struct nfs_locku_args arg;
5200 struct nfs_locku_res res;
5201 struct nfs4_lock_state *lsp;
5202 struct nfs_open_context *ctx;
5203 struct file_lock fl;
5204 const struct nfs_server *server;
5205 unsigned long timestamp;
5208 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5209 struct nfs_open_context *ctx,
5210 struct nfs4_lock_state *lsp,
5211 struct nfs_seqid *seqid)
5213 struct nfs4_unlockdata *p;
5214 struct inode *inode = lsp->ls_state->inode;
5216 p = kzalloc(sizeof(*p), GFP_NOFS);
5219 p->arg.fh = NFS_FH(inode);
5221 p->arg.seqid = seqid;
5222 p->res.seqid = seqid;
5223 p->arg.stateid = &lsp->ls_stateid;
5225 atomic_inc(&lsp->ls_count);
5226 /* Ensure we don't close file until we're done freeing locks! */
5227 p->ctx = get_nfs_open_context(ctx);
5228 memcpy(&p->fl, fl, sizeof(p->fl));
5229 p->server = NFS_SERVER(inode);
5233 static void nfs4_locku_release_calldata(void *data)
5235 struct nfs4_unlockdata *calldata = data;
5236 nfs_free_seqid(calldata->arg.seqid);
5237 nfs4_put_lock_state(calldata->lsp);
5238 put_nfs_open_context(calldata->ctx);
5242 static void nfs4_locku_done(struct rpc_task *task, void *data)
5244 struct nfs4_unlockdata *calldata = data;
5246 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5248 switch (task->tk_status) {
5250 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5251 &calldata->res.stateid);
5252 renew_lease(calldata->server, calldata->timestamp);
5254 case -NFS4ERR_BAD_STATEID:
5255 case -NFS4ERR_OLD_STATEID:
5256 case -NFS4ERR_STALE_STATEID:
5257 case -NFS4ERR_EXPIRED:
5260 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
5261 rpc_restart_call_prepare(task);
5263 nfs_release_seqid(calldata->arg.seqid);
5266 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
5268 struct nfs4_unlockdata *calldata = data;
5270 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
5272 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
5273 /* Note: exit _without_ running nfs4_locku_done */
5276 calldata->timestamp = jiffies;
5277 if (nfs4_setup_sequence(calldata->server,
5278 &calldata->arg.seq_args,
5279 &calldata->res.seq_res,
5281 nfs_release_seqid(calldata->arg.seqid);
5284 task->tk_action = NULL;
5286 nfs4_sequence_done(task, &calldata->res.seq_res);
5289 static const struct rpc_call_ops nfs4_locku_ops = {
5290 .rpc_call_prepare = nfs4_locku_prepare,
5291 .rpc_call_done = nfs4_locku_done,
5292 .rpc_release = nfs4_locku_release_calldata,
5295 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5296 struct nfs_open_context *ctx,
5297 struct nfs4_lock_state *lsp,
5298 struct nfs_seqid *seqid)
5300 struct nfs4_unlockdata *data;
5301 struct rpc_message msg = {
5302 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5303 .rpc_cred = ctx->cred,
5305 struct rpc_task_setup task_setup_data = {
5306 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5307 .rpc_message = &msg,
5308 .callback_ops = &nfs4_locku_ops,
5309 .workqueue = nfsiod_workqueue,
5310 .flags = RPC_TASK_ASYNC,
5313 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5314 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5316 /* Ensure this is an unlock - when canceling a lock, the
5317 * canceled lock is passed in, and it won't be an unlock.
5319 fl->fl_type = F_UNLCK;
5321 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5323 nfs_free_seqid(seqid);
5324 return ERR_PTR(-ENOMEM);
5327 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5328 msg.rpc_argp = &data->arg;
5329 msg.rpc_resp = &data->res;
5330 task_setup_data.callback_data = data;
5331 return rpc_run_task(&task_setup_data);
5334 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5336 struct inode *inode = state->inode;
5337 struct nfs4_state_owner *sp = state->owner;
5338 struct nfs_inode *nfsi = NFS_I(inode);
5339 struct nfs_seqid *seqid;
5340 struct nfs4_lock_state *lsp;
5341 struct rpc_task *task;
5343 unsigned char fl_flags = request->fl_flags;
5345 status = nfs4_set_lock_state(state, request);
5346 /* Unlock _before_ we do the RPC call */
5347 request->fl_flags |= FL_EXISTS;
5348 /* Exclude nfs_delegation_claim_locks() */
5349 mutex_lock(&sp->so_delegreturn_mutex);
5350 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
5351 down_read(&nfsi->rwsem);
5352 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5353 up_read(&nfsi->rwsem);
5354 mutex_unlock(&sp->so_delegreturn_mutex);
5357 up_read(&nfsi->rwsem);
5358 mutex_unlock(&sp->so_delegreturn_mutex);
5361 /* Is this a delegated lock? */
5362 lsp = request->fl_u.nfs4_fl.owner;
5363 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5365 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
5369 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
5370 status = PTR_ERR(task);
5373 status = nfs4_wait_for_completion_rpc_task(task);
5376 request->fl_flags = fl_flags;
5377 trace_nfs4_unlock(request, state, F_SETLK, status);
5381 struct nfs4_lockdata {
5382 struct nfs_lock_args arg;
5383 struct nfs_lock_res res;
5384 struct nfs4_lock_state *lsp;
5385 struct nfs_open_context *ctx;
5386 struct file_lock fl;
5387 unsigned long timestamp;
5390 struct nfs_server *server;
5393 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
5394 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5397 struct nfs4_lockdata *p;
5398 struct inode *inode = lsp->ls_state->inode;
5399 struct nfs_server *server = NFS_SERVER(inode);
5401 p = kzalloc(sizeof(*p), gfp_mask);
5405 p->arg.fh = NFS_FH(inode);
5407 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
5408 if (p->arg.open_seqid == NULL)
5410 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
5411 if (p->arg.lock_seqid == NULL)
5412 goto out_free_seqid;
5413 p->arg.lock_stateid = &lsp->ls_stateid;
5414 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
5415 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
5416 p->arg.lock_owner.s_dev = server->s_dev;
5417 p->res.lock_seqid = p->arg.lock_seqid;
5420 atomic_inc(&lsp->ls_count);
5421 p->ctx = get_nfs_open_context(ctx);
5422 memcpy(&p->fl, fl, sizeof(p->fl));
5425 nfs_free_seqid(p->arg.open_seqid);
5431 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5433 struct nfs4_lockdata *data = calldata;
5434 struct nfs4_state *state = data->lsp->ls_state;
5436 dprintk("%s: begin!\n", __func__);
5437 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
5439 /* Do we need to do an open_to_lock_owner? */
5440 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
5441 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
5442 goto out_release_lock_seqid;
5444 data->arg.open_stateid = &state->open_stateid;
5445 data->arg.new_lock_owner = 1;
5446 data->res.open_seqid = data->arg.open_seqid;
5448 data->arg.new_lock_owner = 0;
5449 if (!nfs4_valid_open_stateid(state)) {
5450 data->rpc_status = -EBADF;
5451 task->tk_action = NULL;
5452 goto out_release_open_seqid;
5454 data->timestamp = jiffies;
5455 if (nfs4_setup_sequence(data->server,
5456 &data->arg.seq_args,
5460 out_release_open_seqid:
5461 nfs_release_seqid(data->arg.open_seqid);
5462 out_release_lock_seqid:
5463 nfs_release_seqid(data->arg.lock_seqid);
5465 nfs4_sequence_done(task, &data->res.seq_res);
5466 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
5469 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5471 struct nfs4_lockdata *data = calldata;
5473 dprintk("%s: begin!\n", __func__);
5475 if (!nfs4_sequence_done(task, &data->res.seq_res))
5478 data->rpc_status = task->tk_status;
5479 if (data->arg.new_lock_owner != 0) {
5480 if (data->rpc_status == 0)
5481 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5485 if (data->rpc_status == 0) {
5486 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
5487 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
5488 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
5491 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
5494 static void nfs4_lock_release(void *calldata)
5496 struct nfs4_lockdata *data = calldata;
5498 dprintk("%s: begin!\n", __func__);
5499 nfs_free_seqid(data->arg.open_seqid);
5500 if (data->cancelled != 0) {
5501 struct rpc_task *task;
5502 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5503 data->arg.lock_seqid);
5505 rpc_put_task_async(task);
5506 dprintk("%s: cancelling lock!\n", __func__);
5508 nfs_free_seqid(data->arg.lock_seqid);
5509 nfs4_put_lock_state(data->lsp);
5510 put_nfs_open_context(data->ctx);
5512 dprintk("%s: done!\n", __func__);
5515 static const struct rpc_call_ops nfs4_lock_ops = {
5516 .rpc_call_prepare = nfs4_lock_prepare,
5517 .rpc_call_done = nfs4_lock_done,
5518 .rpc_release = nfs4_lock_release,
5521 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5524 case -NFS4ERR_ADMIN_REVOKED:
5525 case -NFS4ERR_BAD_STATEID:
5526 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
5527 if (new_lock_owner != 0 ||
5528 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
5529 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
5531 case -NFS4ERR_STALE_STATEID:
5532 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
5533 case -NFS4ERR_EXPIRED:
5534 nfs4_schedule_lease_recovery(server->nfs_client);
5538 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
5540 struct nfs4_lockdata *data;
5541 struct rpc_task *task;
5542 struct rpc_message msg = {
5543 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5544 .rpc_cred = state->owner->so_cred,
5546 struct rpc_task_setup task_setup_data = {
5547 .rpc_client = NFS_CLIENT(state->inode),
5548 .rpc_message = &msg,
5549 .callback_ops = &nfs4_lock_ops,
5550 .workqueue = nfsiod_workqueue,
5551 .flags = RPC_TASK_ASYNC,
5555 dprintk("%s: begin!\n", __func__);
5556 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
5557 fl->fl_u.nfs4_fl.owner,
5558 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
5562 data->arg.block = 1;
5563 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5564 msg.rpc_argp = &data->arg;
5565 msg.rpc_resp = &data->res;
5566 task_setup_data.callback_data = data;
5567 if (recovery_type > NFS_LOCK_NEW) {
5568 if (recovery_type == NFS_LOCK_RECLAIM)
5569 data->arg.reclaim = NFS_LOCK_RECLAIM;
5570 nfs4_set_sequence_privileged(&data->arg.seq_args);
5572 task = rpc_run_task(&task_setup_data);
5574 return PTR_ERR(task);
5575 ret = nfs4_wait_for_completion_rpc_task(task);
5577 ret = data->rpc_status;
5579 nfs4_handle_setlk_error(data->server, data->lsp,
5580 data->arg.new_lock_owner, ret);
5582 data->cancelled = 1;
5584 dprintk("%s: done, ret = %d!\n", __func__, ret);
5588 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5590 struct nfs_server *server = NFS_SERVER(state->inode);
5591 struct nfs4_exception exception = {
5592 .inode = state->inode,
5597 /* Cache the lock if possible... */
5598 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5600 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
5601 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
5602 if (err != -NFS4ERR_DELAY)
5604 nfs4_handle_exception(server, err, &exception);
5605 } while (exception.retry);
5609 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5611 struct nfs_server *server = NFS_SERVER(state->inode);
5612 struct nfs4_exception exception = {
5613 .inode = state->inode,
5617 err = nfs4_set_lock_state(state, request);
5620 if (!recover_lost_locks) {
5621 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5625 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5627 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
5628 trace_nfs4_lock_expired(request, state, F_SETLK, err);
5632 case -NFS4ERR_GRACE:
5633 case -NFS4ERR_DELAY:
5634 nfs4_handle_exception(server, err, &exception);
5637 } while (exception.retry);
5642 #if defined(CONFIG_NFS_V4_1)
5644 * nfs41_check_expired_locks - possibly free a lock stateid
5646 * @state: NFSv4 state for an inode
5648 * Returns NFS_OK if recovery for this stateid is now finished.
5649 * Otherwise a negative NFS4ERR value is returned.
5651 static int nfs41_check_expired_locks(struct nfs4_state *state)
5653 int status, ret = -NFS4ERR_BAD_STATEID;
5654 struct nfs4_lock_state *lsp;
5655 struct nfs_server *server = NFS_SERVER(state->inode);
5657 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
5658 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
5659 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5661 status = nfs41_test_stateid(server,
5664 trace_nfs4_test_lock_stateid(state, lsp, status);
5665 if (status != NFS_OK) {
5666 /* Free the stateid unless the server
5667 * informs us the stateid is unrecognized. */
5668 if (status != -NFS4ERR_BAD_STATEID)
5669 nfs41_free_stateid(server,
5672 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5681 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5683 int status = NFS_OK;
5685 if (test_bit(LK_STATE_IN_USE, &state->flags))
5686 status = nfs41_check_expired_locks(state);
5687 if (status != NFS_OK)
5688 status = nfs4_lock_expired(state, request);
5693 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5695 struct nfs4_state_owner *sp = state->owner;
5696 struct nfs_inode *nfsi = NFS_I(state->inode);
5697 unsigned char fl_flags = request->fl_flags;
5699 int status = -ENOLCK;
5701 if ((fl_flags & FL_POSIX) &&
5702 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5704 /* Is this a delegated open? */
5705 status = nfs4_set_lock_state(state, request);
5708 request->fl_flags |= FL_ACCESS;
5709 status = do_vfs_lock(request->fl_file, request);
5712 down_read(&nfsi->rwsem);
5713 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
5714 /* Yes: cache locks! */
5715 /* ...but avoid races with delegation recall... */
5716 request->fl_flags = fl_flags & ~FL_SLEEP;
5717 status = do_vfs_lock(request->fl_file, request);
5720 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5721 up_read(&nfsi->rwsem);
5722 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
5725 down_read(&nfsi->rwsem);
5726 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5727 status = -NFS4ERR_DELAY;
5730 /* Note: we always want to sleep here! */
5731 request->fl_flags = fl_flags | FL_SLEEP;
5732 if (do_vfs_lock(request->fl_file, request) < 0)
5733 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5734 "manager!\n", __func__);
5736 up_read(&nfsi->rwsem);
5738 request->fl_flags = fl_flags;
5742 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5744 struct nfs4_exception exception = {
5746 .inode = state->inode,
5751 err = _nfs4_proc_setlk(state, cmd, request);
5752 trace_nfs4_set_lock(request, state, cmd, err);
5753 if (err == -NFS4ERR_DENIED)
5755 err = nfs4_handle_exception(NFS_SERVER(state->inode),
5757 } while (exception.retry);
5762 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5764 struct nfs_open_context *ctx;
5765 struct nfs4_state *state;
5766 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5769 /* verify open state */
5770 ctx = nfs_file_open_context(filp);
5773 if (request->fl_start < 0 || request->fl_end < 0)
5776 if (IS_GETLK(cmd)) {
5778 return nfs4_proc_getlk(state, F_GETLK, request);
5782 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5785 if (request->fl_type == F_UNLCK) {
5787 return nfs4_proc_unlck(state, cmd, request);
5794 * Don't rely on the VFS having checked the file open mode,
5795 * since it won't do this for flock() locks.
5797 switch (request->fl_type) {
5799 if (!(filp->f_mode & FMODE_READ))
5803 if (!(filp->f_mode & FMODE_WRITE))
5808 status = nfs4_proc_setlk(state, cmd, request);
5809 if ((status != -EAGAIN) || IS_SETLK(cmd))
5811 timeout = nfs4_set_lock_task_retry(timeout);
5812 status = -ERESTARTSYS;
5815 } while(status < 0);
5819 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
5821 struct nfs_server *server = NFS_SERVER(state->inode);
5824 err = nfs4_set_lock_state(state, fl);
5827 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
5828 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
5831 struct nfs_release_lockowner_data {
5832 struct nfs4_lock_state *lsp;
5833 struct nfs_server *server;
5834 struct nfs_release_lockowner_args args;
5835 struct nfs_release_lockowner_res res;
5836 unsigned long timestamp;
5839 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
5841 struct nfs_release_lockowner_data *data = calldata;
5842 nfs40_setup_sequence(data->server,
5843 &data->args.seq_args, &data->res.seq_res, task);
5844 data->timestamp = jiffies;
5847 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
5849 struct nfs_release_lockowner_data *data = calldata;
5850 struct nfs_server *server = data->server;
5852 nfs40_sequence_done(task, &data->res.seq_res);
5854 switch (task->tk_status) {
5856 renew_lease(server, data->timestamp);
5858 case -NFS4ERR_STALE_CLIENTID:
5859 case -NFS4ERR_EXPIRED:
5860 case -NFS4ERR_LEASE_MOVED:
5861 case -NFS4ERR_DELAY:
5862 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN)
5863 rpc_restart_call_prepare(task);
5867 static void nfs4_release_lockowner_release(void *calldata)
5869 struct nfs_release_lockowner_data *data = calldata;
5870 nfs4_free_lock_state(data->server, data->lsp);
5874 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
5875 .rpc_call_prepare = nfs4_release_lockowner_prepare,
5876 .rpc_call_done = nfs4_release_lockowner_done,
5877 .rpc_release = nfs4_release_lockowner_release,
5880 static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
5882 struct nfs_release_lockowner_data *data;
5883 struct rpc_message msg = {
5884 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5887 if (server->nfs_client->cl_mvops->minor_version != 0)
5890 data = kmalloc(sizeof(*data), GFP_NOFS);
5894 data->server = server;
5895 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5896 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5897 data->args.lock_owner.s_dev = server->s_dev;
5899 msg.rpc_argp = &data->args;
5900 msg.rpc_resp = &data->res;
5901 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
5902 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5906 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5908 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5909 const void *buf, size_t buflen,
5910 int flags, int type)
5912 if (strcmp(key, "") != 0)
5915 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
5918 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5919 void *buf, size_t buflen, int type)
5921 if (strcmp(key, "") != 0)
5924 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
5927 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5928 size_t list_len, const char *name,
5929 size_t name_len, int type)
5931 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
5933 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5936 if (list && len <= list_len)
5937 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
5941 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
5942 static inline int nfs4_server_supports_labels(struct nfs_server *server)
5944 return server->caps & NFS_CAP_SECURITY_LABEL;
5947 static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
5948 const void *buf, size_t buflen,
5949 int flags, int type)
5951 if (security_ismaclabel(key))
5952 return nfs4_set_security_label(dentry, buf, buflen);
5957 static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
5958 void *buf, size_t buflen, int type)
5960 if (security_ismaclabel(key))
5961 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
5965 static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
5966 size_t list_len, const char *name,
5967 size_t name_len, int type)
5971 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
5972 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
5973 if (list && len <= list_len)
5974 security_inode_listsecurity(dentry->d_inode, list, len);
5979 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
5980 .prefix = XATTR_SECURITY_PREFIX,
5981 .list = nfs4_xattr_list_nfs4_label,
5982 .get = nfs4_xattr_get_nfs4_label,
5983 .set = nfs4_xattr_set_nfs4_label,
5989 * nfs_fhget will use either the mounted_on_fileid or the fileid
5991 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5993 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5994 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5995 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
5996 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
5999 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
6000 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
6001 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6005 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6006 const struct qstr *name,
6007 struct nfs4_fs_locations *fs_locations,
6010 struct nfs_server *server = NFS_SERVER(dir);
6012 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6014 struct nfs4_fs_locations_arg args = {
6015 .dir_fh = NFS_FH(dir),
6020 struct nfs4_fs_locations_res res = {
6021 .fs_locations = fs_locations,
6023 struct rpc_message msg = {
6024 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6030 dprintk("%s: start\n", __func__);
6032 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6033 * is not supported */
6034 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6035 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6037 bitmask[0] |= FATTR4_WORD0_FILEID;
6039 nfs_fattr_init(&fs_locations->fattr);
6040 fs_locations->server = server;
6041 fs_locations->nlocations = 0;
6042 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
6043 dprintk("%s: returned status = %d\n", __func__, status);
6047 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6048 const struct qstr *name,
6049 struct nfs4_fs_locations *fs_locations,
6052 struct nfs4_exception exception = { };
6055 err = _nfs4_proc_fs_locations(client, dir, name,
6056 fs_locations, page);
6057 trace_nfs4_get_fs_locations(dir, name, err);
6058 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6060 } while (exception.retry);
6065 * This operation also signals the server that this client is
6066 * performing migration recovery. The server can stop returning
6067 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6068 * appended to this compound to identify the client ID which is
6069 * performing recovery.
6071 static int _nfs40_proc_get_locations(struct inode *inode,
6072 struct nfs4_fs_locations *locations,
6073 struct page *page, struct rpc_cred *cred)
6075 struct nfs_server *server = NFS_SERVER(inode);
6076 struct rpc_clnt *clnt = server->client;
6078 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6080 struct nfs4_fs_locations_arg args = {
6081 .clientid = server->nfs_client->cl_clientid,
6082 .fh = NFS_FH(inode),
6085 .migration = 1, /* skip LOOKUP */
6086 .renew = 1, /* append RENEW */
6088 struct nfs4_fs_locations_res res = {
6089 .fs_locations = locations,
6093 struct rpc_message msg = {
6094 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6099 unsigned long now = jiffies;
6102 nfs_fattr_init(&locations->fattr);
6103 locations->server = server;
6104 locations->nlocations = 0;
6106 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6107 nfs4_set_sequence_privileged(&args.seq_args);
6108 status = nfs4_call_sync_sequence(clnt, server, &msg,
6109 &args.seq_args, &res.seq_res);
6113 renew_lease(server, now);
6117 #ifdef CONFIG_NFS_V4_1
6120 * This operation also signals the server that this client is
6121 * performing migration recovery. The server can stop asserting
6122 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6123 * performing this operation is identified in the SEQUENCE
6124 * operation in this compound.
6126 * When the client supports GETATTR(fs_locations_info), it can
6127 * be plumbed in here.
6129 static int _nfs41_proc_get_locations(struct inode *inode,
6130 struct nfs4_fs_locations *locations,
6131 struct page *page, struct rpc_cred *cred)
6133 struct nfs_server *server = NFS_SERVER(inode);
6134 struct rpc_clnt *clnt = server->client;
6136 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6138 struct nfs4_fs_locations_arg args = {
6139 .fh = NFS_FH(inode),
6142 .migration = 1, /* skip LOOKUP */
6144 struct nfs4_fs_locations_res res = {
6145 .fs_locations = locations,
6148 struct rpc_message msg = {
6149 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6156 nfs_fattr_init(&locations->fattr);
6157 locations->server = server;
6158 locations->nlocations = 0;
6160 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6161 nfs4_set_sequence_privileged(&args.seq_args);
6162 status = nfs4_call_sync_sequence(clnt, server, &msg,
6163 &args.seq_args, &res.seq_res);
6164 if (status == NFS4_OK &&
6165 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6166 status = -NFS4ERR_LEASE_MOVED;
6170 #endif /* CONFIG_NFS_V4_1 */
6173 * nfs4_proc_get_locations - discover locations for a migrated FSID
6174 * @inode: inode on FSID that is migrating
6175 * @locations: result of query
6177 * @cred: credential to use for this operation
6179 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6180 * operation failed, or a negative errno if a local error occurred.
6182 * On success, "locations" is filled in, but if the server has
6183 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6186 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6187 * from this client that require migration recovery.
6189 int nfs4_proc_get_locations(struct inode *inode,
6190 struct nfs4_fs_locations *locations,
6191 struct page *page, struct rpc_cred *cred)
6193 struct nfs_server *server = NFS_SERVER(inode);
6194 struct nfs_client *clp = server->nfs_client;
6195 const struct nfs4_mig_recovery_ops *ops =
6196 clp->cl_mvops->mig_recovery_ops;
6197 struct nfs4_exception exception = { };
6200 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6201 (unsigned long long)server->fsid.major,
6202 (unsigned long long)server->fsid.minor,
6204 nfs_display_fhandle(NFS_FH(inode), __func__);
6207 status = ops->get_locations(inode, locations, page, cred);
6208 if (status != -NFS4ERR_DELAY)
6210 nfs4_handle_exception(server, status, &exception);
6211 } while (exception.retry);
6216 * This operation also signals the server that this client is
6217 * performing "lease moved" recovery. The server can stop
6218 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6219 * is appended to this compound to identify the client ID which is
6220 * performing recovery.
6222 static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6224 struct nfs_server *server = NFS_SERVER(inode);
6225 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6226 struct rpc_clnt *clnt = server->client;
6227 struct nfs4_fsid_present_arg args = {
6228 .fh = NFS_FH(inode),
6229 .clientid = clp->cl_clientid,
6230 .renew = 1, /* append RENEW */
6232 struct nfs4_fsid_present_res res = {
6235 struct rpc_message msg = {
6236 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6241 unsigned long now = jiffies;
6244 res.fh = nfs_alloc_fhandle();
6248 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6249 nfs4_set_sequence_privileged(&args.seq_args);
6250 status = nfs4_call_sync_sequence(clnt, server, &msg,
6251 &args.seq_args, &res.seq_res);
6252 nfs_free_fhandle(res.fh);
6256 do_renew_lease(clp, now);
6260 #ifdef CONFIG_NFS_V4_1
6263 * This operation also signals the server that this client is
6264 * performing "lease moved" recovery. The server can stop asserting
6265 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6266 * this operation is identified in the SEQUENCE operation in this
6269 static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6271 struct nfs_server *server = NFS_SERVER(inode);
6272 struct rpc_clnt *clnt = server->client;
6273 struct nfs4_fsid_present_arg args = {
6274 .fh = NFS_FH(inode),
6276 struct nfs4_fsid_present_res res = {
6278 struct rpc_message msg = {
6279 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6286 res.fh = nfs_alloc_fhandle();
6290 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6291 nfs4_set_sequence_privileged(&args.seq_args);
6292 status = nfs4_call_sync_sequence(clnt, server, &msg,
6293 &args.seq_args, &res.seq_res);
6294 nfs_free_fhandle(res.fh);
6295 if (status == NFS4_OK &&
6296 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6297 status = -NFS4ERR_LEASE_MOVED;
6301 #endif /* CONFIG_NFS_V4_1 */
6304 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6305 * @inode: inode on FSID to check
6306 * @cred: credential to use for this operation
6308 * Server indicates whether the FSID is present, moved, or not
6309 * recognized. This operation is necessary to clear a LEASE_MOVED
6310 * condition for this client ID.
6312 * Returns NFS4_OK if the FSID is present on this server,
6313 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6314 * NFS4ERR code if some error occurred on the server, or a
6315 * negative errno if a local failure occurred.
6317 int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6319 struct nfs_server *server = NFS_SERVER(inode);
6320 struct nfs_client *clp = server->nfs_client;
6321 const struct nfs4_mig_recovery_ops *ops =
6322 clp->cl_mvops->mig_recovery_ops;
6323 struct nfs4_exception exception = { };
6326 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6327 (unsigned long long)server->fsid.major,
6328 (unsigned long long)server->fsid.minor,
6330 nfs_display_fhandle(NFS_FH(inode), __func__);
6333 status = ops->fsid_present(inode, cred);
6334 if (status != -NFS4ERR_DELAY)
6336 nfs4_handle_exception(server, status, &exception);
6337 } while (exception.retry);
6342 * If 'use_integrity' is true and the state managment nfs_client
6343 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6344 * and the machine credential as per RFC3530bis and RFC5661 Security
6345 * Considerations sections. Otherwise, just use the user cred with the
6346 * filesystem's rpc_client.
6348 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
6351 struct nfs4_secinfo_arg args = {
6352 .dir_fh = NFS_FH(dir),
6355 struct nfs4_secinfo_res res = {
6358 struct rpc_message msg = {
6359 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6363 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
6364 struct rpc_cred *cred = NULL;
6366 if (use_integrity) {
6367 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
6368 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6369 msg.rpc_cred = cred;
6372 dprintk("NFS call secinfo %s\n", name->name);
6374 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6375 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6377 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6379 dprintk("NFS reply secinfo: %d\n", status);
6387 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6388 struct nfs4_secinfo_flavors *flavors)
6390 struct nfs4_exception exception = { };
6393 err = -NFS4ERR_WRONGSEC;
6395 /* try to use integrity protection with machine cred */
6396 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6397 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6400 * if unable to use integrity protection, or SECINFO with
6401 * integrity protection returns NFS4ERR_WRONGSEC (which is
6402 * disallowed by spec, but exists in deployed servers) use
6403 * the current filesystem's rpc_client and the user cred.
6405 if (err == -NFS4ERR_WRONGSEC)
6406 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6408 trace_nfs4_secinfo(dir, name, err);
6409 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6411 } while (exception.retry);
6415 #ifdef CONFIG_NFS_V4_1
6417 * Check the exchange flags returned by the server for invalid flags, having
6418 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6421 static int nfs4_check_cl_exchange_flags(u32 flags)
6423 if (flags & ~EXCHGID4_FLAG_MASK_R)
6425 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6426 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6428 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6432 return -NFS4ERR_INVAL;
6436 nfs41_same_server_scope(struct nfs41_server_scope *a,
6437 struct nfs41_server_scope *b)
6439 if (a->server_scope_sz == b->server_scope_sz &&
6440 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6447 * nfs4_proc_bind_conn_to_session()
6449 * The 4.1 client currently uses the same TCP connection for the
6450 * fore and backchannel.
6452 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
6455 struct nfs41_bind_conn_to_session_res res;
6456 struct rpc_message msg = {
6458 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6464 dprintk("--> %s\n", __func__);
6466 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
6467 if (unlikely(res.session == NULL)) {
6472 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6473 trace_nfs4_bind_conn_to_session(clp, status);
6475 if (memcmp(res.session->sess_id.data,
6476 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6477 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6481 if (res.dir != NFS4_CDFS4_BOTH) {
6482 dprintk("NFS: %s: Unexpected direction from server\n",
6487 if (res.use_conn_in_rdma_mode) {
6488 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6497 dprintk("<-- %s status= %d\n", __func__, status);
6502 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6503 * and operations we'd like to see to enable certain features in the allow map
6505 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6506 .how = SP4_MACH_CRED,
6507 .enforce.u.words = {
6508 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6509 1 << (OP_EXCHANGE_ID - 32) |
6510 1 << (OP_CREATE_SESSION - 32) |
6511 1 << (OP_DESTROY_SESSION - 32) |
6512 1 << (OP_DESTROY_CLIENTID - 32)
6515 [0] = 1 << (OP_CLOSE) |
6518 [1] = 1 << (OP_SECINFO - 32) |
6519 1 << (OP_SECINFO_NO_NAME - 32) |
6520 1 << (OP_TEST_STATEID - 32) |
6521 1 << (OP_FREE_STATEID - 32) |
6522 1 << (OP_WRITE - 32)
6527 * Select the state protection mode for client `clp' given the server results
6528 * from exchange_id in `sp'.
6530 * Returns 0 on success, negative errno otherwise.
6532 static int nfs4_sp4_select_mode(struct nfs_client *clp,
6533 struct nfs41_state_protection *sp)
6535 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6536 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6537 1 << (OP_EXCHANGE_ID - 32) |
6538 1 << (OP_CREATE_SESSION - 32) |
6539 1 << (OP_DESTROY_SESSION - 32) |
6540 1 << (OP_DESTROY_CLIENTID - 32)
6544 if (sp->how == SP4_MACH_CRED) {
6545 /* Print state protect result */
6546 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6547 for (i = 0; i <= LAST_NFS4_OP; i++) {
6548 if (test_bit(i, sp->enforce.u.longs))
6549 dfprintk(MOUNT, " enforce op %d\n", i);
6550 if (test_bit(i, sp->allow.u.longs))
6551 dfprintk(MOUNT, " allow op %d\n", i);
6554 /* make sure nothing is on enforce list that isn't supported */
6555 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6556 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6557 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6563 * Minimal mode - state operations are allowed to use machine
6564 * credential. Note this already happens by default, so the
6565 * client doesn't have to do anything more than the negotiation.
6567 * NOTE: we don't care if EXCHANGE_ID is in the list -
6568 * we're already using the machine cred for exchange_id
6569 * and will never use a different cred.
6571 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6572 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6573 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6574 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6575 dfprintk(MOUNT, "sp4_mach_cred:\n");
6576 dfprintk(MOUNT, " minimal mode enabled\n");
6577 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6579 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6583 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6584 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6585 dfprintk(MOUNT, " cleanup mode enabled\n");
6586 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6589 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6590 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6591 dfprintk(MOUNT, " secinfo mode enabled\n");
6592 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6595 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6596 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6597 dfprintk(MOUNT, " stateid mode enabled\n");
6598 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6601 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6602 dfprintk(MOUNT, " write mode enabled\n");
6603 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6606 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6607 dfprintk(MOUNT, " commit mode enabled\n");
6608 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6616 * _nfs4_proc_exchange_id()
6618 * Wrapper for EXCHANGE_ID operation.
6620 static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6623 nfs4_verifier verifier;
6624 struct nfs41_exchange_id_args args = {
6625 .verifier = &verifier,
6627 #ifdef CONFIG_NFS_V4_1_MIGRATION
6628 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6629 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6630 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6632 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6633 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6636 struct nfs41_exchange_id_res res = {
6640 struct rpc_message msg = {
6641 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6647 nfs4_init_boot_verifier(clp, &verifier);
6648 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6650 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6651 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6652 args.id_len, args.id);
6654 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
6656 if (unlikely(res.server_owner == NULL)) {
6661 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
6663 if (unlikely(res.server_scope == NULL)) {
6665 goto out_server_owner;
6668 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
6669 if (unlikely(res.impl_id == NULL)) {
6671 goto out_server_scope;
6676 args.state_protect.how = SP4_NONE;
6680 args.state_protect = nfs4_sp4_mach_cred_request;
6687 goto out_server_scope;
6690 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6691 trace_nfs4_exchange_id(clp, status);
6693 status = nfs4_check_cl_exchange_flags(res.flags);
6696 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6699 clp->cl_clientid = res.clientid;
6700 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6701 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6702 clp->cl_seqid = res.seqid;
6704 kfree(clp->cl_serverowner);
6705 clp->cl_serverowner = res.server_owner;
6706 res.server_owner = NULL;
6708 /* use the most recent implementation id */
6709 kfree(clp->cl_implid);
6710 clp->cl_implid = res.impl_id;
6712 if (clp->cl_serverscope != NULL &&
6713 !nfs41_same_server_scope(clp->cl_serverscope,
6714 res.server_scope)) {
6715 dprintk("%s: server_scope mismatch detected\n",
6717 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
6718 kfree(clp->cl_serverscope);
6719 clp->cl_serverscope = NULL;
6722 if (clp->cl_serverscope == NULL) {
6723 clp->cl_serverscope = res.server_scope;
6730 kfree(res.server_owner);
6732 kfree(res.server_scope);
6734 if (clp->cl_implid != NULL)
6735 dprintk("NFS reply exchange_id: Server Implementation ID: "
6736 "domain: %s, name: %s, date: %llu,%u\n",
6737 clp->cl_implid->domain, clp->cl_implid->name,
6738 clp->cl_implid->date.seconds,
6739 clp->cl_implid->date.nseconds);
6740 dprintk("NFS reply exchange_id: %d\n", status);
6745 * nfs4_proc_exchange_id()
6747 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6749 * Since the clientid has expired, all compounds using sessions
6750 * associated with the stale clientid will be returning
6751 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6752 * be in some phase of session reset.
6754 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6756 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6758 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6761 /* try SP4_MACH_CRED if krb5i/p */
6762 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6763 authflavor == RPC_AUTH_GSS_KRB5P) {
6764 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6770 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6773 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6774 struct rpc_cred *cred)
6776 struct rpc_message msg = {
6777 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6783 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6784 trace_nfs4_destroy_clientid(clp, status);
6786 dprintk("NFS: Got error %d from the server %s on "
6787 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6791 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6792 struct rpc_cred *cred)
6797 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6798 ret = _nfs4_proc_destroy_clientid(clp, cred);
6800 case -NFS4ERR_DELAY:
6801 case -NFS4ERR_CLIENTID_BUSY:
6811 int nfs4_destroy_clientid(struct nfs_client *clp)
6813 struct rpc_cred *cred;
6816 if (clp->cl_mvops->minor_version < 1)
6818 if (clp->cl_exchange_flags == 0)
6820 if (clp->cl_preserve_clid)
6822 cred = nfs4_get_clid_cred(clp);
6823 ret = nfs4_proc_destroy_clientid(clp, cred);
6828 case -NFS4ERR_STALE_CLIENTID:
6829 clp->cl_exchange_flags = 0;
6835 struct nfs4_get_lease_time_data {
6836 struct nfs4_get_lease_time_args *args;
6837 struct nfs4_get_lease_time_res *res;
6838 struct nfs_client *clp;
6841 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6844 struct nfs4_get_lease_time_data *data =
6845 (struct nfs4_get_lease_time_data *)calldata;
6847 dprintk("--> %s\n", __func__);
6848 /* just setup sequence, do not trigger session recovery
6849 since we're invoked within one */
6850 nfs41_setup_sequence(data->clp->cl_session,
6851 &data->args->la_seq_args,
6852 &data->res->lr_seq_res,
6854 dprintk("<-- %s\n", __func__);
6858 * Called from nfs4_state_manager thread for session setup, so don't recover
6859 * from sequence operation or clientid errors.
6861 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6863 struct nfs4_get_lease_time_data *data =
6864 (struct nfs4_get_lease_time_data *)calldata;
6866 dprintk("--> %s\n", __func__);
6867 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6869 switch (task->tk_status) {
6870 case -NFS4ERR_DELAY:
6871 case -NFS4ERR_GRACE:
6872 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
6873 rpc_delay(task, NFS4_POLL_RETRY_MIN);
6874 task->tk_status = 0;
6876 case -NFS4ERR_RETRY_UNCACHED_REP:
6877 rpc_restart_call_prepare(task);
6880 dprintk("<-- %s\n", __func__);
6883 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
6884 .rpc_call_prepare = nfs4_get_lease_time_prepare,
6885 .rpc_call_done = nfs4_get_lease_time_done,
6888 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
6890 struct rpc_task *task;
6891 struct nfs4_get_lease_time_args args;
6892 struct nfs4_get_lease_time_res res = {
6893 .lr_fsinfo = fsinfo,
6895 struct nfs4_get_lease_time_data data = {
6900 struct rpc_message msg = {
6901 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
6905 struct rpc_task_setup task_setup = {
6906 .rpc_client = clp->cl_rpcclient,
6907 .rpc_message = &msg,
6908 .callback_ops = &nfs4_get_lease_time_ops,
6909 .callback_data = &data,
6910 .flags = RPC_TASK_TIMEOUT,
6914 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
6915 nfs4_set_sequence_privileged(&args.la_seq_args);
6916 dprintk("--> %s\n", __func__);
6917 task = rpc_run_task(&task_setup);
6920 status = PTR_ERR(task);
6922 status = task->tk_status;
6925 dprintk("<-- %s return %d\n", __func__, status);
6931 * Initialize the values to be used by the client in CREATE_SESSION
6932 * If nfs4_init_session set the fore channel request and response sizes,
6935 * Set the back channel max_resp_sz_cached to zero to force the client to
6936 * always set csa_cachethis to FALSE because the current implementation
6937 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
6939 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
6941 unsigned int max_rqst_sz, max_resp_sz;
6943 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
6944 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
6946 /* Fore channel attributes */
6947 args->fc_attrs.max_rqst_sz = max_rqst_sz;
6948 args->fc_attrs.max_resp_sz = max_resp_sz;
6949 args->fc_attrs.max_ops = NFS4_MAX_OPS;
6950 args->fc_attrs.max_reqs = max_session_slots;
6952 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
6953 "max_ops=%u max_reqs=%u\n",
6955 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
6956 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
6958 /* Back channel attributes */
6959 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
6960 args->bc_attrs.max_resp_sz = PAGE_SIZE;
6961 args->bc_attrs.max_resp_sz_cached = 0;
6962 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
6963 args->bc_attrs.max_reqs = 1;
6965 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
6966 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
6968 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
6969 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
6970 args->bc_attrs.max_reqs);
6973 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
6975 struct nfs4_channel_attrs *sent = &args->fc_attrs;
6976 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
6978 if (rcvd->max_resp_sz > sent->max_resp_sz)
6981 * Our requested max_ops is the minimum we need; we're not
6982 * prepared to break up compounds into smaller pieces than that.
6983 * So, no point even trying to continue if the server won't
6986 if (rcvd->max_ops < sent->max_ops)
6988 if (rcvd->max_reqs == 0)
6990 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
6991 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
6995 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
6997 struct nfs4_channel_attrs *sent = &args->bc_attrs;
6998 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
7000 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7002 if (rcvd->max_resp_sz < sent->max_resp_sz)
7004 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7006 /* These would render the backchannel useless: */
7007 if (rcvd->max_ops != sent->max_ops)
7009 if (rcvd->max_reqs != sent->max_reqs)
7014 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7015 struct nfs4_session *session)
7019 ret = nfs4_verify_fore_channel_attrs(args, session);
7022 return nfs4_verify_back_channel_attrs(args, session);
7025 static int _nfs4_proc_create_session(struct nfs_client *clp,
7026 struct rpc_cred *cred)
7028 struct nfs4_session *session = clp->cl_session;
7029 struct nfs41_create_session_args args = {
7031 .cb_program = NFS4_CALLBACK,
7033 struct nfs41_create_session_res res = {
7036 struct rpc_message msg = {
7037 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7044 nfs4_init_channel_attrs(&args);
7045 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
7047 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7048 trace_nfs4_create_session(clp, status);
7051 /* Verify the session's negotiated channel_attrs values */
7052 status = nfs4_verify_channel_attrs(&args, session);
7053 /* Increment the clientid slot sequence id */
7061 * Issues a CREATE_SESSION operation to the server.
7062 * It is the responsibility of the caller to verify the session is
7063 * expired before calling this routine.
7065 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
7069 struct nfs4_session *session = clp->cl_session;
7071 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7073 status = _nfs4_proc_create_session(clp, cred);
7077 /* Init or reset the session slot tables */
7078 status = nfs4_setup_session_slot_tables(session);
7079 dprintk("slot table setup returned %d\n", status);
7083 ptr = (unsigned *)&session->sess_id.data[0];
7084 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7085 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
7087 dprintk("<-- %s\n", __func__);
7092 * Issue the over-the-wire RPC DESTROY_SESSION.
7093 * The caller must serialize access to this routine.
7095 int nfs4_proc_destroy_session(struct nfs4_session *session,
7096 struct rpc_cred *cred)
7098 struct rpc_message msg = {
7099 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7100 .rpc_argp = session,
7105 dprintk("--> nfs4_proc_destroy_session\n");
7107 /* session is still being setup */
7108 if (session->clp->cl_cons_state != NFS_CS_READY)
7111 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7112 trace_nfs4_destroy_session(session->clp, status);
7115 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
7116 "Session has been destroyed regardless...\n", status);
7118 dprintk("<-- nfs4_proc_destroy_session\n");
7123 * Renew the cl_session lease.
7125 struct nfs4_sequence_data {
7126 struct nfs_client *clp;
7127 struct nfs4_sequence_args args;
7128 struct nfs4_sequence_res res;
7131 static void nfs41_sequence_release(void *data)
7133 struct nfs4_sequence_data *calldata = data;
7134 struct nfs_client *clp = calldata->clp;
7136 if (atomic_read(&clp->cl_count) > 1)
7137 nfs4_schedule_state_renewal(clp);
7138 nfs_put_client(clp);
7142 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7144 switch(task->tk_status) {
7145 case -NFS4ERR_DELAY:
7146 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7149 nfs4_schedule_lease_recovery(clp);
7154 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
7156 struct nfs4_sequence_data *calldata = data;
7157 struct nfs_client *clp = calldata->clp;
7159 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7162 trace_nfs4_sequence(clp, task->tk_status);
7163 if (task->tk_status < 0) {
7164 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7165 if (atomic_read(&clp->cl_count) == 1)
7168 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7169 rpc_restart_call_prepare(task);
7173 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7175 dprintk("<-- %s\n", __func__);
7178 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7180 struct nfs4_sequence_data *calldata = data;
7181 struct nfs_client *clp = calldata->clp;
7182 struct nfs4_sequence_args *args;
7183 struct nfs4_sequence_res *res;
7185 args = task->tk_msg.rpc_argp;
7186 res = task->tk_msg.rpc_resp;
7188 nfs41_setup_sequence(clp->cl_session, args, res, task);
7191 static const struct rpc_call_ops nfs41_sequence_ops = {
7192 .rpc_call_done = nfs41_sequence_call_done,
7193 .rpc_call_prepare = nfs41_sequence_prepare,
7194 .rpc_release = nfs41_sequence_release,
7197 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7198 struct rpc_cred *cred,
7201 struct nfs4_sequence_data *calldata;
7202 struct rpc_message msg = {
7203 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7206 struct rpc_task_setup task_setup_data = {
7207 .rpc_client = clp->cl_rpcclient,
7208 .rpc_message = &msg,
7209 .callback_ops = &nfs41_sequence_ops,
7210 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
7213 if (!atomic_inc_not_zero(&clp->cl_count))
7214 return ERR_PTR(-EIO);
7215 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7216 if (calldata == NULL) {
7217 nfs_put_client(clp);
7218 return ERR_PTR(-ENOMEM);
7220 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
7222 nfs4_set_sequence_privileged(&calldata->args);
7223 msg.rpc_argp = &calldata->args;
7224 msg.rpc_resp = &calldata->res;
7225 calldata->clp = clp;
7226 task_setup_data.callback_data = calldata;
7228 return rpc_run_task(&task_setup_data);
7231 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
7233 struct rpc_task *task;
7236 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
7238 task = _nfs41_proc_sequence(clp, cred, false);
7240 ret = PTR_ERR(task);
7242 rpc_put_task_async(task);
7243 dprintk("<-- %s status=%d\n", __func__, ret);
7247 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7249 struct rpc_task *task;
7252 task = _nfs41_proc_sequence(clp, cred, true);
7254 ret = PTR_ERR(task);
7257 ret = rpc_wait_for_completion_task(task);
7259 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7261 if (task->tk_status == 0)
7262 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
7263 ret = task->tk_status;
7267 dprintk("<-- %s status=%d\n", __func__, ret);
7271 struct nfs4_reclaim_complete_data {
7272 struct nfs_client *clp;
7273 struct nfs41_reclaim_complete_args arg;
7274 struct nfs41_reclaim_complete_res res;
7277 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7279 struct nfs4_reclaim_complete_data *calldata = data;
7281 nfs41_setup_sequence(calldata->clp->cl_session,
7282 &calldata->arg.seq_args,
7283 &calldata->res.seq_res,
7287 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7289 switch(task->tk_status) {
7291 case -NFS4ERR_COMPLETE_ALREADY:
7292 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7294 case -NFS4ERR_DELAY:
7295 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7297 case -NFS4ERR_RETRY_UNCACHED_REP:
7300 nfs4_schedule_lease_recovery(clp);
7305 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7307 struct nfs4_reclaim_complete_data *calldata = data;
7308 struct nfs_client *clp = calldata->clp;
7309 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7311 dprintk("--> %s\n", __func__);
7312 if (!nfs41_sequence_done(task, res))
7315 trace_nfs4_reclaim_complete(clp, task->tk_status);
7316 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7317 rpc_restart_call_prepare(task);
7320 dprintk("<-- %s\n", __func__);
7323 static void nfs4_free_reclaim_complete_data(void *data)
7325 struct nfs4_reclaim_complete_data *calldata = data;
7330 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7331 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7332 .rpc_call_done = nfs4_reclaim_complete_done,
7333 .rpc_release = nfs4_free_reclaim_complete_data,
7337 * Issue a global reclaim complete.
7339 static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7340 struct rpc_cred *cred)
7342 struct nfs4_reclaim_complete_data *calldata;
7343 struct rpc_task *task;
7344 struct rpc_message msg = {
7345 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
7348 struct rpc_task_setup task_setup_data = {
7349 .rpc_client = clp->cl_rpcclient,
7350 .rpc_message = &msg,
7351 .callback_ops = &nfs4_reclaim_complete_call_ops,
7352 .flags = RPC_TASK_ASYNC,
7354 int status = -ENOMEM;
7356 dprintk("--> %s\n", __func__);
7357 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7358 if (calldata == NULL)
7360 calldata->clp = clp;
7361 calldata->arg.one_fs = 0;
7363 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
7364 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
7365 msg.rpc_argp = &calldata->arg;
7366 msg.rpc_resp = &calldata->res;
7367 task_setup_data.callback_data = calldata;
7368 task = rpc_run_task(&task_setup_data);
7370 status = PTR_ERR(task);
7373 status = nfs4_wait_for_completion_rpc_task(task);
7375 status = task->tk_status;
7379 dprintk("<-- %s status=%d\n", __func__, status);
7384 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7386 struct nfs4_layoutget *lgp = calldata;
7387 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
7388 struct nfs4_session *session = nfs4_get_session(server);
7390 dprintk("--> %s\n", __func__);
7391 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7392 * right now covering the LAYOUTGET we are about to send.
7393 * However, that is not so catastrophic, and there seems
7394 * to be no way to prevent it completely.
7396 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
7397 &lgp->res.seq_res, task))
7399 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7400 NFS_I(lgp->args.inode)->layout,
7401 lgp->args.ctx->state)) {
7402 rpc_exit(task, NFS4_OK);
7406 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7408 struct nfs4_layoutget *lgp = calldata;
7409 struct inode *inode = lgp->args.inode;
7410 struct nfs_server *server = NFS_SERVER(inode);
7411 struct pnfs_layout_hdr *lo;
7412 struct nfs4_state *state = NULL;
7413 unsigned long timeo, now, giveup;
7415 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
7417 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
7420 switch (task->tk_status) {
7424 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7425 * (or clients) writing to the same RAID stripe
7427 case -NFS4ERR_LAYOUTTRYLATER:
7429 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7430 * existing layout before getting a new one).
7432 case -NFS4ERR_RECALLCONFLICT:
7433 timeo = rpc_get_timeout(task->tk_client);
7434 giveup = lgp->args.timestamp + timeo;
7436 if (time_after(giveup, now)) {
7437 unsigned long delay;
7440 * - Not less then NFS4_POLL_RETRY_MIN.
7441 * - One last time a jiffie before we give up
7442 * - exponential backoff (time_now minus start_attempt)
7444 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7445 min((giveup - now - 1),
7446 now - lgp->args.timestamp));
7448 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7450 rpc_delay(task, delay);
7451 task->tk_status = 0;
7452 rpc_restart_call_prepare(task);
7453 goto out; /* Do not call nfs4_async_handle_error() */
7456 case -NFS4ERR_EXPIRED:
7457 case -NFS4ERR_BAD_STATEID:
7458 spin_lock(&inode->i_lock);
7459 lo = NFS_I(inode)->layout;
7460 if (!lo || list_empty(&lo->plh_segs)) {
7461 spin_unlock(&inode->i_lock);
7462 /* If the open stateid was bad, then recover it. */
7463 state = lgp->args.ctx->state;
7467 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7468 spin_unlock(&inode->i_lock);
7469 /* Mark the bad layout state as invalid, then
7470 * retry using the open stateid. */
7471 pnfs_free_lseg_list(&head);
7474 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
7475 rpc_restart_call_prepare(task);
7477 dprintk("<-- %s\n", __func__);
7480 static size_t max_response_pages(struct nfs_server *server)
7482 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7483 return nfs_page_array_len(0, max_resp_sz);
7486 static void nfs4_free_pages(struct page **pages, size_t size)
7493 for (i = 0; i < size; i++) {
7496 __free_page(pages[i]);
7501 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7503 struct page **pages;
7506 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7508 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7512 for (i = 0; i < size; i++) {
7513 pages[i] = alloc_page(gfp_flags);
7515 dprintk("%s: failed to allocate page\n", __func__);
7516 nfs4_free_pages(pages, size);
7524 static void nfs4_layoutget_release(void *calldata)
7526 struct nfs4_layoutget *lgp = calldata;
7527 struct inode *inode = lgp->args.inode;
7528 struct nfs_server *server = NFS_SERVER(inode);
7529 size_t max_pages = max_response_pages(server);
7531 dprintk("--> %s\n", __func__);
7532 nfs4_free_pages(lgp->args.layout.pages, max_pages);
7533 pnfs_put_layout_hdr(NFS_I(inode)->layout);
7534 put_nfs_open_context(lgp->args.ctx);
7536 dprintk("<-- %s\n", __func__);
7539 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7540 .rpc_call_prepare = nfs4_layoutget_prepare,
7541 .rpc_call_done = nfs4_layoutget_done,
7542 .rpc_release = nfs4_layoutget_release,
7545 struct pnfs_layout_segment *
7546 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
7548 struct inode *inode = lgp->args.inode;
7549 struct nfs_server *server = NFS_SERVER(inode);
7550 size_t max_pages = max_response_pages(server);
7551 struct rpc_task *task;
7552 struct rpc_message msg = {
7553 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7554 .rpc_argp = &lgp->args,
7555 .rpc_resp = &lgp->res,
7556 .rpc_cred = lgp->cred,
7558 struct rpc_task_setup task_setup_data = {
7559 .rpc_client = server->client,
7560 .rpc_message = &msg,
7561 .callback_ops = &nfs4_layoutget_call_ops,
7562 .callback_data = lgp,
7563 .flags = RPC_TASK_ASYNC,
7565 struct pnfs_layout_segment *lseg = NULL;
7568 dprintk("--> %s\n", __func__);
7570 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7571 if (!lgp->args.layout.pages) {
7572 nfs4_layoutget_release(lgp);
7573 return ERR_PTR(-ENOMEM);
7575 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
7576 lgp->args.timestamp = jiffies;
7578 lgp->res.layoutp = &lgp->args.layout;
7579 lgp->res.seq_res.sr_slot = NULL;
7580 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
7582 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7583 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7585 task = rpc_run_task(&task_setup_data);
7587 return ERR_CAST(task);
7588 status = nfs4_wait_for_completion_rpc_task(task);
7590 status = task->tk_status;
7591 trace_nfs4_layoutget(lgp->args.ctx,
7595 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7596 if (status == 0 && lgp->res.layoutp->len)
7597 lseg = pnfs_layout_process(lgp);
7599 dprintk("<-- %s status=%d\n", __func__, status);
7601 return ERR_PTR(status);
7606 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7608 struct nfs4_layoutreturn *lrp = calldata;
7610 dprintk("--> %s\n", __func__);
7611 nfs41_setup_sequence(lrp->clp->cl_session,
7612 &lrp->args.seq_args,
7617 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7619 struct nfs4_layoutreturn *lrp = calldata;
7620 struct nfs_server *server;
7622 dprintk("--> %s\n", __func__);
7624 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
7627 server = NFS_SERVER(lrp->args.inode);
7628 switch (task->tk_status) {
7630 task->tk_status = 0;
7633 case -NFS4ERR_DELAY:
7634 if (nfs4_async_handle_error(task, server, NULL) != -EAGAIN)
7636 rpc_restart_call_prepare(task);
7639 dprintk("<-- %s\n", __func__);
7642 static void nfs4_layoutreturn_release(void *calldata)
7644 struct nfs4_layoutreturn *lrp = calldata;
7645 struct pnfs_layout_hdr *lo = lrp->args.layout;
7647 dprintk("--> %s\n", __func__);
7648 spin_lock(&lo->plh_inode->i_lock);
7649 if (lrp->res.lrs_present)
7650 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7651 lo->plh_block_lgets--;
7652 spin_unlock(&lo->plh_inode->i_lock);
7653 pnfs_put_layout_hdr(lrp->args.layout);
7655 dprintk("<-- %s\n", __func__);
7658 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7659 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7660 .rpc_call_done = nfs4_layoutreturn_done,
7661 .rpc_release = nfs4_layoutreturn_release,
7664 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
7666 struct rpc_task *task;
7667 struct rpc_message msg = {
7668 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7669 .rpc_argp = &lrp->args,
7670 .rpc_resp = &lrp->res,
7671 .rpc_cred = lrp->cred,
7673 struct rpc_task_setup task_setup_data = {
7674 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
7675 .rpc_message = &msg,
7676 .callback_ops = &nfs4_layoutreturn_call_ops,
7677 .callback_data = lrp,
7681 dprintk("--> %s\n", __func__);
7682 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
7683 task = rpc_run_task(&task_setup_data);
7685 return PTR_ERR(task);
7686 status = task->tk_status;
7687 trace_nfs4_layoutreturn(lrp->args.inode, status);
7688 dprintk("<-- %s status=%d\n", __func__, status);
7694 * Retrieve the list of Data Server devices from the MDS.
7696 static int _nfs4_getdevicelist(struct nfs_server *server,
7697 const struct nfs_fh *fh,
7698 struct pnfs_devicelist *devlist)
7700 struct nfs4_getdevicelist_args args = {
7702 .layoutclass = server->pnfs_curr_ld->id,
7704 struct nfs4_getdevicelist_res res = {
7707 struct rpc_message msg = {
7708 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
7714 dprintk("--> %s\n", __func__);
7715 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
7717 dprintk("<-- %s status=%d\n", __func__, status);
7721 int nfs4_proc_getdevicelist(struct nfs_server *server,
7722 const struct nfs_fh *fh,
7723 struct pnfs_devicelist *devlist)
7725 struct nfs4_exception exception = { };
7729 err = nfs4_handle_exception(server,
7730 _nfs4_getdevicelist(server, fh, devlist),
7732 } while (exception.retry);
7734 dprintk("%s: err=%d, num_devs=%u\n", __func__,
7735 err, devlist->num_devs);
7739 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
7742 _nfs4_proc_getdeviceinfo(struct nfs_server *server,
7743 struct pnfs_device *pdev,
7744 struct rpc_cred *cred)
7746 struct nfs4_getdeviceinfo_args args = {
7749 struct nfs4_getdeviceinfo_res res = {
7752 struct rpc_message msg = {
7753 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7760 dprintk("--> %s\n", __func__);
7761 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
7762 dprintk("<-- %s status=%d\n", __func__, status);
7767 int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7768 struct pnfs_device *pdev,
7769 struct rpc_cred *cred)
7771 struct nfs4_exception exception = { };
7775 err = nfs4_handle_exception(server,
7776 _nfs4_proc_getdeviceinfo(server, pdev, cred),
7778 } while (exception.retry);
7781 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7783 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7785 struct nfs4_layoutcommit_data *data = calldata;
7786 struct nfs_server *server = NFS_SERVER(data->args.inode);
7787 struct nfs4_session *session = nfs4_get_session(server);
7789 nfs41_setup_sequence(session,
7790 &data->args.seq_args,
7796 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7798 struct nfs4_layoutcommit_data *data = calldata;
7799 struct nfs_server *server = NFS_SERVER(data->args.inode);
7801 if (!nfs41_sequence_done(task, &data->res.seq_res))
7804 switch (task->tk_status) { /* Just ignore these failures */
7805 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7806 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7807 case -NFS4ERR_BADLAYOUT: /* no layout */
7808 case -NFS4ERR_GRACE: /* loca_recalim always false */
7809 task->tk_status = 0;
7813 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
7814 rpc_restart_call_prepare(task);
7820 static void nfs4_layoutcommit_release(void *calldata)
7822 struct nfs4_layoutcommit_data *data = calldata;
7824 pnfs_cleanup_layoutcommit(data);
7825 nfs_post_op_update_inode_force_wcc(data->args.inode,
7827 put_rpccred(data->cred);
7831 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7832 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7833 .rpc_call_done = nfs4_layoutcommit_done,
7834 .rpc_release = nfs4_layoutcommit_release,
7838 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
7840 struct rpc_message msg = {
7841 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7842 .rpc_argp = &data->args,
7843 .rpc_resp = &data->res,
7844 .rpc_cred = data->cred,
7846 struct rpc_task_setup task_setup_data = {
7847 .task = &data->task,
7848 .rpc_client = NFS_CLIENT(data->args.inode),
7849 .rpc_message = &msg,
7850 .callback_ops = &nfs4_layoutcommit_ops,
7851 .callback_data = data,
7852 .flags = RPC_TASK_ASYNC,
7854 struct rpc_task *task;
7857 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7858 "lbw: %llu inode %lu\n",
7859 data->task.tk_pid, sync,
7860 data->args.lastbytewritten,
7861 data->args.inode->i_ino);
7863 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
7864 task = rpc_run_task(&task_setup_data);
7866 return PTR_ERR(task);
7869 status = nfs4_wait_for_completion_rpc_task(task);
7872 status = task->tk_status;
7873 trace_nfs4_layoutcommit(data->args.inode, status);
7875 dprintk("%s: status %d\n", __func__, status);
7881 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7882 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7885 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7886 struct nfs_fsinfo *info,
7887 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
7889 struct nfs41_secinfo_no_name_args args = {
7890 .style = SECINFO_STYLE_CURRENT_FH,
7892 struct nfs4_secinfo_res res = {
7895 struct rpc_message msg = {
7896 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
7900 struct rpc_clnt *clnt = server->client;
7901 struct rpc_cred *cred = NULL;
7904 if (use_integrity) {
7905 clnt = server->nfs_client->cl_rpcclient;
7906 cred = nfs4_get_clid_cred(server->nfs_client);
7907 msg.rpc_cred = cred;
7910 dprintk("--> %s\n", __func__);
7911 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
7913 dprintk("<-- %s status=%d\n", __func__, status);
7922 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7923 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7925 struct nfs4_exception exception = { };
7928 /* first try using integrity protection */
7929 err = -NFS4ERR_WRONGSEC;
7931 /* try to use integrity protection with machine cred */
7932 if (_nfs4_is_integrity_protected(server->nfs_client))
7933 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
7937 * if unable to use integrity protection, or SECINFO with
7938 * integrity protection returns NFS4ERR_WRONGSEC (which is
7939 * disallowed by spec, but exists in deployed servers) use
7940 * the current filesystem's rpc_client and the user cred.
7942 if (err == -NFS4ERR_WRONGSEC)
7943 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
7948 case -NFS4ERR_WRONGSEC:
7952 err = nfs4_handle_exception(server, err, &exception);
7954 } while (exception.retry);
7960 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
7961 struct nfs_fsinfo *info)
7965 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
7966 struct nfs4_secinfo_flavors *flavors;
7967 struct nfs4_secinfo4 *secinfo;
7970 page = alloc_page(GFP_KERNEL);
7976 flavors = page_address(page);
7977 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7980 * Fall back on "guess and check" method if
7981 * the server doesn't support SECINFO_NO_NAME
7983 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
7984 err = nfs4_find_root_sec(server, fhandle, info);
7990 for (i = 0; i < flavors->num_flavors; i++) {
7991 secinfo = &flavors->flavors[i];
7993 switch (secinfo->flavor) {
7997 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
7998 &secinfo->flavor_info);
8001 flavor = RPC_AUTH_MAXFLAVOR;
8005 if (!nfs_auth_info_match(&server->auth_info, flavor))
8006 flavor = RPC_AUTH_MAXFLAVOR;
8008 if (flavor != RPC_AUTH_MAXFLAVOR) {
8009 err = nfs4_lookup_root_sec(server, fhandle,
8016 if (flavor == RPC_AUTH_MAXFLAVOR)
8027 static int _nfs41_test_stateid(struct nfs_server *server,
8028 nfs4_stateid *stateid,
8029 struct rpc_cred *cred)
8032 struct nfs41_test_stateid_args args = {
8035 struct nfs41_test_stateid_res res;
8036 struct rpc_message msg = {
8037 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8042 struct rpc_clnt *rpc_client = server->client;
8044 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8047 dprintk("NFS call test_stateid %p\n", stateid);
8048 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8049 nfs4_set_sequence_privileged(&args.seq_args);
8050 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8051 &args.seq_args, &res.seq_res);
8052 if (status != NFS_OK) {
8053 dprintk("NFS reply test_stateid: failed, %d\n", status);
8056 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
8061 * nfs41_test_stateid - perform a TEST_STATEID operation
8063 * @server: server / transport on which to perform the operation
8064 * @stateid: state ID to test
8067 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8068 * Otherwise a negative NFS4ERR value is returned if the operation
8069 * failed or the state ID is not currently valid.
8071 static int nfs41_test_stateid(struct nfs_server *server,
8072 nfs4_stateid *stateid,
8073 struct rpc_cred *cred)
8075 struct nfs4_exception exception = { };
8078 err = _nfs41_test_stateid(server, stateid, cred);
8079 if (err != -NFS4ERR_DELAY)
8081 nfs4_handle_exception(server, err, &exception);
8082 } while (exception.retry);
8086 struct nfs_free_stateid_data {
8087 struct nfs_server *server;
8088 struct nfs41_free_stateid_args args;
8089 struct nfs41_free_stateid_res res;
8092 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8094 struct nfs_free_stateid_data *data = calldata;
8095 nfs41_setup_sequence(nfs4_get_session(data->server),
8096 &data->args.seq_args,
8101 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8103 struct nfs_free_stateid_data *data = calldata;
8105 nfs41_sequence_done(task, &data->res.seq_res);
8107 switch (task->tk_status) {
8108 case -NFS4ERR_DELAY:
8109 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
8110 rpc_restart_call_prepare(task);
8114 static void nfs41_free_stateid_release(void *calldata)
8119 static const struct rpc_call_ops nfs41_free_stateid_ops = {
8120 .rpc_call_prepare = nfs41_free_stateid_prepare,
8121 .rpc_call_done = nfs41_free_stateid_done,
8122 .rpc_release = nfs41_free_stateid_release,
8125 static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8126 nfs4_stateid *stateid,
8127 struct rpc_cred *cred,
8130 struct rpc_message msg = {
8131 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
8134 struct rpc_task_setup task_setup = {
8135 .rpc_client = server->client,
8136 .rpc_message = &msg,
8137 .callback_ops = &nfs41_free_stateid_ops,
8138 .flags = RPC_TASK_ASYNC,
8140 struct nfs_free_stateid_data *data;
8142 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8143 &task_setup.rpc_client, &msg);
8145 dprintk("NFS call free_stateid %p\n", stateid);
8146 data = kmalloc(sizeof(*data), GFP_NOFS);
8148 return ERR_PTR(-ENOMEM);
8149 data->server = server;
8150 nfs4_stateid_copy(&data->args.stateid, stateid);
8152 task_setup.callback_data = data;
8154 msg.rpc_argp = &data->args;
8155 msg.rpc_resp = &data->res;
8156 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
8158 nfs4_set_sequence_privileged(&data->args.seq_args);
8160 return rpc_run_task(&task_setup);
8164 * nfs41_free_stateid - perform a FREE_STATEID operation
8166 * @server: server / transport on which to perform the operation
8167 * @stateid: state ID to release
8170 * Returns NFS_OK if the server freed "stateid". Otherwise a
8171 * negative NFS4ERR value is returned.
8173 static int nfs41_free_stateid(struct nfs_server *server,
8174 nfs4_stateid *stateid,
8175 struct rpc_cred *cred)
8177 struct rpc_task *task;
8180 task = _nfs41_free_stateid(server, stateid, cred, true);
8182 return PTR_ERR(task);
8183 ret = rpc_wait_for_completion_task(task);
8185 ret = task->tk_status;
8190 static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
8192 struct rpc_task *task;
8193 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
8195 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
8196 nfs4_free_lock_state(server, lsp);
8198 return PTR_ERR(task);
8203 static bool nfs41_match_stateid(const nfs4_stateid *s1,
8204 const nfs4_stateid *s2)
8206 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
8209 if (s1->seqid == s2->seqid)
8211 if (s1->seqid == 0 || s2->seqid == 0)
8217 #endif /* CONFIG_NFS_V4_1 */
8219 static bool nfs4_match_stateid(const nfs4_stateid *s1,
8220 const nfs4_stateid *s2)
8222 return nfs4_stateid_match(s1, s2);
8226 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
8227 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8228 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8229 .recover_open = nfs4_open_reclaim,
8230 .recover_lock = nfs4_lock_reclaim,
8231 .establish_clid = nfs4_init_clientid,
8232 .detect_trunking = nfs40_discover_server_trunking,
8235 #if defined(CONFIG_NFS_V4_1)
8236 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
8237 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8238 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8239 .recover_open = nfs4_open_reclaim,
8240 .recover_lock = nfs4_lock_reclaim,
8241 .establish_clid = nfs41_init_clientid,
8242 .reclaim_complete = nfs41_proc_reclaim_complete,
8243 .detect_trunking = nfs41_discover_server_trunking,
8245 #endif /* CONFIG_NFS_V4_1 */
8247 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
8248 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8249 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8250 .recover_open = nfs4_open_expired,
8251 .recover_lock = nfs4_lock_expired,
8252 .establish_clid = nfs4_init_clientid,
8255 #if defined(CONFIG_NFS_V4_1)
8256 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
8257 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8258 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8259 .recover_open = nfs41_open_expired,
8260 .recover_lock = nfs41_lock_expired,
8261 .establish_clid = nfs41_init_clientid,
8263 #endif /* CONFIG_NFS_V4_1 */
8265 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
8266 .sched_state_renewal = nfs4_proc_async_renew,
8267 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8268 .renew_lease = nfs4_proc_renew,
8271 #if defined(CONFIG_NFS_V4_1)
8272 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
8273 .sched_state_renewal = nfs41_proc_async_sequence,
8274 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8275 .renew_lease = nfs4_proc_sequence,
8279 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
8280 .get_locations = _nfs40_proc_get_locations,
8281 .fsid_present = _nfs40_proc_fsid_present,
8284 #if defined(CONFIG_NFS_V4_1)
8285 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
8286 .get_locations = _nfs41_proc_get_locations,
8287 .fsid_present = _nfs41_proc_fsid_present,
8289 #endif /* CONFIG_NFS_V4_1 */
8291 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8293 .init_caps = NFS_CAP_READDIRPLUS
8294 | NFS_CAP_ATOMIC_OPEN
8295 | NFS_CAP_CHANGE_ATTR
8296 | NFS_CAP_POSIX_LOCK,
8297 .init_client = nfs40_init_client,
8298 .shutdown_client = nfs40_shutdown_client,
8299 .match_stateid = nfs4_match_stateid,
8300 .find_root_sec = nfs4_find_root_sec,
8301 .free_lock_state = nfs4_release_lockowner,
8302 .call_sync_ops = &nfs40_call_sync_ops,
8303 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8304 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8305 .state_renewal_ops = &nfs40_state_renewal_ops,
8306 .mig_recovery_ops = &nfs40_mig_recovery_ops,
8309 #if defined(CONFIG_NFS_V4_1)
8310 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8312 .init_caps = NFS_CAP_READDIRPLUS
8313 | NFS_CAP_ATOMIC_OPEN
8314 | NFS_CAP_CHANGE_ATTR
8315 | NFS_CAP_POSIX_LOCK
8316 | NFS_CAP_STATEID_NFSV41
8317 | NFS_CAP_ATOMIC_OPEN_V1,
8318 .init_client = nfs41_init_client,
8319 .shutdown_client = nfs41_shutdown_client,
8320 .match_stateid = nfs41_match_stateid,
8321 .find_root_sec = nfs41_find_root_sec,
8322 .free_lock_state = nfs41_free_lock_state,
8323 .call_sync_ops = &nfs41_call_sync_ops,
8324 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8325 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8326 .state_renewal_ops = &nfs41_state_renewal_ops,
8327 .mig_recovery_ops = &nfs41_mig_recovery_ops,
8331 #if defined(CONFIG_NFS_V4_2)
8332 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8334 .init_caps = NFS_CAP_READDIRPLUS
8335 | NFS_CAP_ATOMIC_OPEN
8336 | NFS_CAP_CHANGE_ATTR
8337 | NFS_CAP_POSIX_LOCK
8338 | NFS_CAP_STATEID_NFSV41
8339 | NFS_CAP_ATOMIC_OPEN_V1,
8340 .init_client = nfs41_init_client,
8341 .shutdown_client = nfs41_shutdown_client,
8342 .match_stateid = nfs41_match_stateid,
8343 .find_root_sec = nfs41_find_root_sec,
8344 .free_lock_state = nfs41_free_lock_state,
8345 .call_sync_ops = &nfs41_call_sync_ops,
8346 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8347 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8348 .state_renewal_ops = &nfs41_state_renewal_ops,
8352 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8353 [0] = &nfs_v4_0_minor_ops,
8354 #if defined(CONFIG_NFS_V4_1)
8355 [1] = &nfs_v4_1_minor_ops,
8357 #if defined(CONFIG_NFS_V4_2)
8358 [2] = &nfs_v4_2_minor_ops,
8362 static const struct inode_operations nfs4_dir_inode_operations = {
8363 .create = nfs_create,
8364 .lookup = nfs_lookup,
8365 .atomic_open = nfs_atomic_open,
8367 .unlink = nfs_unlink,
8368 .symlink = nfs_symlink,
8372 .rename = nfs_rename,
8373 .permission = nfs_permission,
8374 .getattr = nfs_getattr,
8375 .setattr = nfs_setattr,
8376 .getxattr = generic_getxattr,
8377 .setxattr = generic_setxattr,
8378 .listxattr = generic_listxattr,
8379 .removexattr = generic_removexattr,
8382 static const struct inode_operations nfs4_file_inode_operations = {
8383 .permission = nfs_permission,
8384 .getattr = nfs_getattr,
8385 .setattr = nfs_setattr,
8386 .getxattr = generic_getxattr,
8387 .setxattr = generic_setxattr,
8388 .listxattr = generic_listxattr,
8389 .removexattr = generic_removexattr,
8392 const struct nfs_rpc_ops nfs_v4_clientops = {
8393 .version = 4, /* protocol version */
8394 .dentry_ops = &nfs4_dentry_operations,
8395 .dir_inode_ops = &nfs4_dir_inode_operations,
8396 .file_inode_ops = &nfs4_file_inode_operations,
8397 .file_ops = &nfs4_file_operations,
8398 .getroot = nfs4_proc_get_root,
8399 .submount = nfs4_submount,
8400 .try_mount = nfs4_try_mount,
8401 .getattr = nfs4_proc_getattr,
8402 .setattr = nfs4_proc_setattr,
8403 .lookup = nfs4_proc_lookup,
8404 .access = nfs4_proc_access,
8405 .readlink = nfs4_proc_readlink,
8406 .create = nfs4_proc_create,
8407 .remove = nfs4_proc_remove,
8408 .unlink_setup = nfs4_proc_unlink_setup,
8409 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
8410 .unlink_done = nfs4_proc_unlink_done,
8411 .rename = nfs4_proc_rename,
8412 .rename_setup = nfs4_proc_rename_setup,
8413 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
8414 .rename_done = nfs4_proc_rename_done,
8415 .link = nfs4_proc_link,
8416 .symlink = nfs4_proc_symlink,
8417 .mkdir = nfs4_proc_mkdir,
8418 .rmdir = nfs4_proc_remove,
8419 .readdir = nfs4_proc_readdir,
8420 .mknod = nfs4_proc_mknod,
8421 .statfs = nfs4_proc_statfs,
8422 .fsinfo = nfs4_proc_fsinfo,
8423 .pathconf = nfs4_proc_pathconf,
8424 .set_capabilities = nfs4_server_capabilities,
8425 .decode_dirent = nfs4_decode_dirent,
8426 .read_setup = nfs4_proc_read_setup,
8427 .read_pageio_init = pnfs_pageio_init_read,
8428 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
8429 .read_done = nfs4_read_done,
8430 .write_setup = nfs4_proc_write_setup,
8431 .write_pageio_init = pnfs_pageio_init_write,
8432 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
8433 .write_done = nfs4_write_done,
8434 .commit_setup = nfs4_proc_commit_setup,
8435 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
8436 .commit_done = nfs4_commit_done,
8437 .lock = nfs4_proc_lock,
8438 .clear_acl_cache = nfs4_zap_acl_attr,
8439 .close_context = nfs4_close_context,
8440 .open_context = nfs4_atomic_open,
8441 .have_delegation = nfs4_have_delegation,
8442 .return_delegation = nfs4_inode_return_delegation,
8443 .alloc_client = nfs4_alloc_client,
8444 .init_client = nfs4_init_client,
8445 .free_client = nfs4_free_client,
8446 .create_server = nfs4_create_server,
8447 .clone_server = nfs_clone_server,
8450 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8451 .prefix = XATTR_NAME_NFSV4_ACL,
8452 .list = nfs4_xattr_list_nfs4_acl,
8453 .get = nfs4_xattr_get_nfs4_acl,
8454 .set = nfs4_xattr_set_nfs4_acl,
8457 const struct xattr_handler *nfs4_xattr_handlers[] = {
8458 &nfs4_xattr_nfs4_acl_handler,
8459 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
8460 &nfs4_xattr_nfs4_label_handler,