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);
1071 kfree(p->f_attr.mdsthreshold);
1075 static void nfs4_opendata_put(struct nfs4_opendata *p)
1078 kref_put(&p->kref, nfs4_opendata_free);
1081 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1085 ret = rpc_wait_for_completion_task(task);
1089 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
1093 if (open_mode & (O_EXCL|O_TRUNC))
1095 switch (mode & (FMODE_READ|FMODE_WRITE)) {
1097 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1098 && state->n_rdonly != 0;
1101 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1102 && state->n_wronly != 0;
1104 case FMODE_READ|FMODE_WRITE:
1105 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1106 && state->n_rdwr != 0;
1112 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
1114 if (delegation == NULL)
1116 if ((delegation->type & fmode) != fmode)
1118 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1120 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1122 nfs_mark_delegation_referenced(delegation);
1126 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
1135 case FMODE_READ|FMODE_WRITE:
1138 nfs4_state_set_mode_locked(state, state->state | fmode);
1141 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1143 struct nfs_client *clp = state->owner->so_server->nfs_client;
1144 bool need_recover = false;
1146 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1147 need_recover = true;
1148 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1149 need_recover = true;
1150 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1151 need_recover = true;
1153 nfs4_state_mark_reclaim_nograce(clp, state);
1156 static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1157 nfs4_stateid *stateid)
1159 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1161 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1162 nfs_test_and_clear_all_open_stateid(state);
1165 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1170 static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1171 nfs4_stateid *stateid, fmode_t fmode)
1173 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1174 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1176 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1179 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1182 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1183 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1184 clear_bit(NFS_OPEN_STATE, &state->flags);
1186 if (stateid == NULL)
1188 if (!nfs_need_update_open_stateid(state, stateid))
1190 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1191 nfs4_stateid_copy(&state->stateid, stateid);
1192 nfs4_stateid_copy(&state->open_stateid, stateid);
1195 static void nfs_clear_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1197 write_seqlock(&state->seqlock);
1198 nfs_clear_open_stateid_locked(state, stateid, fmode);
1199 write_sequnlock(&state->seqlock);
1200 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1201 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1204 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1208 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1211 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1213 case FMODE_READ|FMODE_WRITE:
1214 set_bit(NFS_O_RDWR_STATE, &state->flags);
1216 if (!nfs_need_update_open_stateid(state, stateid))
1218 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1219 nfs4_stateid_copy(&state->stateid, stateid);
1220 nfs4_stateid_copy(&state->open_stateid, stateid);
1223 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1226 * Protect the call to nfs4_state_set_mode_locked and
1227 * serialise the stateid update
1229 write_seqlock(&state->seqlock);
1230 if (deleg_stateid != NULL) {
1231 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1232 set_bit(NFS_DELEGATED_STATE, &state->flags);
1234 if (open_stateid != NULL)
1235 nfs_set_open_stateid_locked(state, open_stateid, fmode);
1236 write_sequnlock(&state->seqlock);
1237 spin_lock(&state->owner->so_lock);
1238 update_open_stateflags(state, fmode);
1239 spin_unlock(&state->owner->so_lock);
1242 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
1244 struct nfs_inode *nfsi = NFS_I(state->inode);
1245 struct nfs_delegation *deleg_cur;
1248 fmode &= (FMODE_READ|FMODE_WRITE);
1251 deleg_cur = rcu_dereference(nfsi->delegation);
1252 if (deleg_cur == NULL)
1255 spin_lock(&deleg_cur->lock);
1256 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
1257 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
1258 (deleg_cur->type & fmode) != fmode)
1259 goto no_delegation_unlock;
1261 if (delegation == NULL)
1262 delegation = &deleg_cur->stateid;
1263 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1264 goto no_delegation_unlock;
1266 nfs_mark_delegation_referenced(deleg_cur);
1267 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1269 no_delegation_unlock:
1270 spin_unlock(&deleg_cur->lock);
1274 if (!ret && open_stateid != NULL) {
1275 __update_open_stateid(state, open_stateid, NULL, fmode);
1278 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1279 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1285 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1287 struct nfs_delegation *delegation;
1290 delegation = rcu_dereference(NFS_I(inode)->delegation);
1291 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1296 nfs4_inode_return_delegation(inode);
1299 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1301 struct nfs4_state *state = opendata->state;
1302 struct nfs_inode *nfsi = NFS_I(state->inode);
1303 struct nfs_delegation *delegation;
1304 int open_mode = opendata->o_arg.open_flags;
1305 fmode_t fmode = opendata->o_arg.fmode;
1306 nfs4_stateid stateid;
1310 if (can_open_cached(state, fmode, open_mode)) {
1311 spin_lock(&state->owner->so_lock);
1312 if (can_open_cached(state, fmode, open_mode)) {
1313 update_open_stateflags(state, fmode);
1314 spin_unlock(&state->owner->so_lock);
1315 goto out_return_state;
1317 spin_unlock(&state->owner->so_lock);
1320 delegation = rcu_dereference(nfsi->delegation);
1321 if (!can_open_delegated(delegation, fmode)) {
1325 /* Save the delegation */
1326 nfs4_stateid_copy(&stateid, &delegation->stateid);
1328 nfs_release_seqid(opendata->o_arg.seqid);
1329 if (!opendata->is_recover) {
1330 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1336 /* Try to update the stateid using the delegation */
1337 if (update_open_stateid(state, NULL, &stateid, fmode))
1338 goto out_return_state;
1341 return ERR_PTR(ret);
1343 atomic_inc(&state->count);
1348 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1350 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1351 struct nfs_delegation *delegation;
1352 int delegation_flags = 0;
1355 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1357 delegation_flags = delegation->flags;
1359 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1360 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1361 "returning a delegation for "
1362 "OPEN(CLAIM_DELEGATE_CUR)\n",
1364 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1365 nfs_inode_set_delegation(state->inode,
1366 data->owner->so_cred,
1369 nfs_inode_reclaim_delegation(state->inode,
1370 data->owner->so_cred,
1375 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1376 * and update the nfs4_state.
1378 static struct nfs4_state *
1379 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1381 struct inode *inode = data->state->inode;
1382 struct nfs4_state *state = data->state;
1385 if (!data->rpc_done) {
1386 if (data->rpc_status) {
1387 ret = data->rpc_status;
1390 /* cached opens have already been processed */
1394 ret = nfs_refresh_inode(inode, &data->f_attr);
1398 if (data->o_res.delegation_type != 0)
1399 nfs4_opendata_check_deleg(data, state);
1401 update_open_stateid(state, &data->o_res.stateid, NULL,
1403 atomic_inc(&state->count);
1407 return ERR_PTR(ret);
1411 static struct nfs4_state *
1412 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1414 struct inode *inode;
1415 struct nfs4_state *state = NULL;
1418 if (!data->rpc_done) {
1419 state = nfs4_try_open_cached(data);
1424 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1426 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1427 ret = PTR_ERR(inode);
1431 state = nfs4_get_open_state(inode, data->owner);
1434 if (data->o_res.delegation_type != 0)
1435 nfs4_opendata_check_deleg(data, state);
1436 update_open_stateid(state, &data->o_res.stateid, NULL,
1440 nfs_release_seqid(data->o_arg.seqid);
1445 return ERR_PTR(ret);
1448 static struct nfs4_state *
1449 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1451 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1452 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1453 return _nfs4_opendata_to_nfs4_state(data);
1456 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1458 struct nfs_inode *nfsi = NFS_I(state->inode);
1459 struct nfs_open_context *ctx;
1461 spin_lock(&state->inode->i_lock);
1462 list_for_each_entry(ctx, &nfsi->open_files, list) {
1463 if (ctx->state != state)
1465 get_nfs_open_context(ctx);
1466 spin_unlock(&state->inode->i_lock);
1469 spin_unlock(&state->inode->i_lock);
1470 return ERR_PTR(-ENOENT);
1473 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1474 struct nfs4_state *state, enum open_claim_type4 claim)
1476 struct nfs4_opendata *opendata;
1478 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1479 NULL, NULL, claim, GFP_NOFS);
1480 if (opendata == NULL)
1481 return ERR_PTR(-ENOMEM);
1482 opendata->state = state;
1483 atomic_inc(&state->count);
1487 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1489 struct nfs4_state *newstate;
1492 opendata->o_arg.open_flags = 0;
1493 opendata->o_arg.fmode = fmode;
1494 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1495 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1496 nfs4_init_opendata_res(opendata);
1497 ret = _nfs4_recover_proc_open(opendata);
1500 newstate = nfs4_opendata_to_nfs4_state(opendata);
1501 if (IS_ERR(newstate))
1502 return PTR_ERR(newstate);
1503 nfs4_close_state(newstate, fmode);
1508 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1510 struct nfs4_state *newstate;
1513 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1514 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1515 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1516 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1517 /* memory barrier prior to reading state->n_* */
1518 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1519 clear_bit(NFS_OPEN_STATE, &state->flags);
1521 if (state->n_rdwr != 0) {
1522 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1525 if (newstate != state)
1528 if (state->n_wronly != 0) {
1529 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1532 if (newstate != state)
1535 if (state->n_rdonly != 0) {
1536 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1539 if (newstate != state)
1543 * We may have performed cached opens for all three recoveries.
1544 * Check if we need to update the current stateid.
1546 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1547 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1548 write_seqlock(&state->seqlock);
1549 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1550 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1551 write_sequnlock(&state->seqlock);
1558 * reclaim state on the server after a reboot.
1560 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1562 struct nfs_delegation *delegation;
1563 struct nfs4_opendata *opendata;
1564 fmode_t delegation_type = 0;
1567 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1568 NFS4_OPEN_CLAIM_PREVIOUS);
1569 if (IS_ERR(opendata))
1570 return PTR_ERR(opendata);
1572 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1573 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1574 delegation_type = delegation->type;
1576 opendata->o_arg.u.delegation_type = delegation_type;
1577 status = nfs4_open_recover(opendata, state);
1578 nfs4_opendata_put(opendata);
1582 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1584 struct nfs_server *server = NFS_SERVER(state->inode);
1585 struct nfs4_exception exception = { };
1588 err = _nfs4_do_open_reclaim(ctx, state);
1589 trace_nfs4_open_reclaim(ctx, 0, err);
1590 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1592 if (err != -NFS4ERR_DELAY)
1594 nfs4_handle_exception(server, err, &exception);
1595 } while (exception.retry);
1599 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1601 struct nfs_open_context *ctx;
1604 ctx = nfs4_state_find_open_context(state);
1607 ret = nfs4_do_open_reclaim(ctx, state);
1608 put_nfs_open_context(ctx);
1612 static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1616 printk(KERN_ERR "NFS: %s: unhandled error "
1617 "%d.\n", __func__, err);
1622 case -NFS4ERR_BADSESSION:
1623 case -NFS4ERR_BADSLOT:
1624 case -NFS4ERR_BAD_HIGH_SLOT:
1625 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1626 case -NFS4ERR_DEADSESSION:
1627 set_bit(NFS_DELEGATED_STATE, &state->flags);
1628 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1630 case -NFS4ERR_STALE_CLIENTID:
1631 case -NFS4ERR_STALE_STATEID:
1632 set_bit(NFS_DELEGATED_STATE, &state->flags);
1633 case -NFS4ERR_EXPIRED:
1634 /* Don't recall a delegation if it was lost */
1635 nfs4_schedule_lease_recovery(server->nfs_client);
1637 case -NFS4ERR_MOVED:
1638 nfs4_schedule_migration_recovery(server);
1640 case -NFS4ERR_LEASE_MOVED:
1641 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1643 case -NFS4ERR_DELEG_REVOKED:
1644 case -NFS4ERR_ADMIN_REVOKED:
1645 case -NFS4ERR_BAD_STATEID:
1646 case -NFS4ERR_OPENMODE:
1647 nfs_inode_find_state_and_recover(state->inode,
1649 nfs4_schedule_stateid_recovery(server, state);
1651 case -NFS4ERR_DELAY:
1652 case -NFS4ERR_GRACE:
1653 set_bit(NFS_DELEGATED_STATE, &state->flags);
1657 case -NFS4ERR_DENIED:
1658 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1664 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1666 struct nfs_server *server = NFS_SERVER(state->inode);
1667 struct nfs4_opendata *opendata;
1670 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1671 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1672 if (IS_ERR(opendata))
1673 return PTR_ERR(opendata);
1674 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1675 err = nfs4_open_recover(opendata, state);
1676 nfs4_opendata_put(opendata);
1677 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1680 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1682 struct nfs4_opendata *data = calldata;
1684 nfs40_setup_sequence(data->o_arg.server, &data->c_arg.seq_args,
1685 &data->c_res.seq_res, task);
1688 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1690 struct nfs4_opendata *data = calldata;
1692 nfs40_sequence_done(task, &data->c_res.seq_res);
1694 data->rpc_status = task->tk_status;
1695 if (data->rpc_status == 0) {
1696 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1697 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1698 renew_lease(data->o_res.server, data->timestamp);
1703 static void nfs4_open_confirm_release(void *calldata)
1705 struct nfs4_opendata *data = calldata;
1706 struct nfs4_state *state = NULL;
1708 /* If this request hasn't been cancelled, do nothing */
1709 if (data->cancelled == 0)
1711 /* In case of error, no cleanup! */
1712 if (!data->rpc_done)
1714 state = nfs4_opendata_to_nfs4_state(data);
1716 nfs4_close_state(state, data->o_arg.fmode);
1718 nfs4_opendata_put(data);
1721 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1722 .rpc_call_prepare = nfs4_open_confirm_prepare,
1723 .rpc_call_done = nfs4_open_confirm_done,
1724 .rpc_release = nfs4_open_confirm_release,
1728 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1730 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1732 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1733 struct rpc_task *task;
1734 struct rpc_message msg = {
1735 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1736 .rpc_argp = &data->c_arg,
1737 .rpc_resp = &data->c_res,
1738 .rpc_cred = data->owner->so_cred,
1740 struct rpc_task_setup task_setup_data = {
1741 .rpc_client = server->client,
1742 .rpc_message = &msg,
1743 .callback_ops = &nfs4_open_confirm_ops,
1744 .callback_data = data,
1745 .workqueue = nfsiod_workqueue,
1746 .flags = RPC_TASK_ASYNC,
1750 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
1751 kref_get(&data->kref);
1753 data->rpc_status = 0;
1754 data->timestamp = jiffies;
1755 task = rpc_run_task(&task_setup_data);
1757 return PTR_ERR(task);
1758 status = nfs4_wait_for_completion_rpc_task(task);
1760 data->cancelled = 1;
1763 status = data->rpc_status;
1768 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1770 struct nfs4_opendata *data = calldata;
1771 struct nfs4_state_owner *sp = data->owner;
1772 struct nfs_client *clp = sp->so_server->nfs_client;
1774 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1777 * Check if we still need to send an OPEN call, or if we can use
1778 * a delegation instead.
1780 if (data->state != NULL) {
1781 struct nfs_delegation *delegation;
1783 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1786 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1787 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1788 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
1789 can_open_delegated(delegation, data->o_arg.fmode))
1790 goto unlock_no_action;
1793 /* Update client id. */
1794 data->o_arg.clientid = clp->cl_clientid;
1795 switch (data->o_arg.claim) {
1796 case NFS4_OPEN_CLAIM_PREVIOUS:
1797 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1798 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1799 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
1800 case NFS4_OPEN_CLAIM_FH:
1801 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1802 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1804 data->timestamp = jiffies;
1805 if (nfs4_setup_sequence(data->o_arg.server,
1806 &data->o_arg.seq_args,
1807 &data->o_res.seq_res,
1809 nfs_release_seqid(data->o_arg.seqid);
1811 /* Set the create mode (note dependency on the session type) */
1812 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1813 if (data->o_arg.open_flags & O_EXCL) {
1814 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1815 if (nfs4_has_persistent_session(clp))
1816 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1817 else if (clp->cl_mvops->minor_version > 0)
1818 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1824 task->tk_action = NULL;
1826 nfs4_sequence_done(task, &data->o_res.seq_res);
1829 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1831 struct nfs4_opendata *data = calldata;
1833 data->rpc_status = task->tk_status;
1835 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1838 if (task->tk_status == 0) {
1839 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1840 switch (data->o_res.f_attr->mode & S_IFMT) {
1844 data->rpc_status = -ELOOP;
1847 data->rpc_status = -EISDIR;
1850 data->rpc_status = -ENOTDIR;
1853 renew_lease(data->o_res.server, data->timestamp);
1854 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1855 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1860 static void nfs4_open_release(void *calldata)
1862 struct nfs4_opendata *data = calldata;
1863 struct nfs4_state *state = NULL;
1865 /* If this request hasn't been cancelled, do nothing */
1866 if (data->cancelled == 0)
1868 /* In case of error, no cleanup! */
1869 if (data->rpc_status != 0 || !data->rpc_done)
1871 /* In case we need an open_confirm, no cleanup! */
1872 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1874 state = nfs4_opendata_to_nfs4_state(data);
1876 nfs4_close_state(state, data->o_arg.fmode);
1878 nfs4_opendata_put(data);
1881 static const struct rpc_call_ops nfs4_open_ops = {
1882 .rpc_call_prepare = nfs4_open_prepare,
1883 .rpc_call_done = nfs4_open_done,
1884 .rpc_release = nfs4_open_release,
1887 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1889 struct inode *dir = data->dir->d_inode;
1890 struct nfs_server *server = NFS_SERVER(dir);
1891 struct nfs_openargs *o_arg = &data->o_arg;
1892 struct nfs_openres *o_res = &data->o_res;
1893 struct rpc_task *task;
1894 struct rpc_message msg = {
1895 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1898 .rpc_cred = data->owner->so_cred,
1900 struct rpc_task_setup task_setup_data = {
1901 .rpc_client = server->client,
1902 .rpc_message = &msg,
1903 .callback_ops = &nfs4_open_ops,
1904 .callback_data = data,
1905 .workqueue = nfsiod_workqueue,
1906 .flags = RPC_TASK_ASYNC,
1910 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1911 kref_get(&data->kref);
1913 data->rpc_status = 0;
1914 data->cancelled = 0;
1915 data->is_recover = 0;
1917 nfs4_set_sequence_privileged(&o_arg->seq_args);
1918 data->is_recover = 1;
1920 task = rpc_run_task(&task_setup_data);
1922 return PTR_ERR(task);
1923 status = nfs4_wait_for_completion_rpc_task(task);
1925 data->cancelled = 1;
1928 status = data->rpc_status;
1934 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1936 struct inode *dir = data->dir->d_inode;
1937 struct nfs_openres *o_res = &data->o_res;
1940 status = nfs4_run_open_task(data, 1);
1941 if (status != 0 || !data->rpc_done)
1944 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1946 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1947 status = _nfs4_proc_open_confirm(data);
1955 static int nfs4_opendata_access(struct rpc_cred *cred,
1956 struct nfs4_opendata *opendata,
1957 struct nfs4_state *state, fmode_t fmode,
1960 struct nfs_access_entry cache;
1963 /* access call failed or for some reason the server doesn't
1964 * support any access modes -- defer access call until later */
1965 if (opendata->o_res.access_supported == 0)
1969 /* don't check MAY_WRITE - a newly created file may not have
1970 * write mode bits, but POSIX allows the creating process to write.
1971 * use openflags to check for exec, because fmode won't
1972 * always have FMODE_EXEC set when file open for exec. */
1973 if (openflags & __FMODE_EXEC) {
1974 /* ONLY check for exec rights */
1976 } else if (fmode & FMODE_READ)
1980 cache.jiffies = jiffies;
1981 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1982 nfs_access_add_cache(state->inode, &cache);
1984 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
1987 /* even though OPEN succeeded, access is denied. Close the file */
1988 nfs4_close_state(state, fmode);
1993 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1995 static int _nfs4_proc_open(struct nfs4_opendata *data)
1997 struct inode *dir = data->dir->d_inode;
1998 struct nfs_server *server = NFS_SERVER(dir);
1999 struct nfs_openargs *o_arg = &data->o_arg;
2000 struct nfs_openres *o_res = &data->o_res;
2003 status = nfs4_run_open_task(data, 0);
2004 if (!data->rpc_done)
2007 if (status == -NFS4ERR_BADNAME &&
2008 !(o_arg->open_flags & O_CREAT))
2013 nfs_fattr_map_and_free_names(server, &data->f_attr);
2015 if (o_arg->open_flags & O_CREAT) {
2016 update_changeattr(dir, &o_res->cinfo);
2017 if (o_arg->open_flags & O_EXCL)
2018 data->file_created = 1;
2019 else if (o_res->cinfo.before != o_res->cinfo.after)
2020 data->file_created = 1;
2022 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2023 server->caps &= ~NFS_CAP_POSIX_LOCK;
2024 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2025 status = _nfs4_proc_open_confirm(data);
2029 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
2030 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
2034 static int nfs4_recover_expired_lease(struct nfs_server *server)
2036 return nfs4_client_recover_expired_lease(server->nfs_client);
2041 * reclaim state on the server after a network partition.
2042 * Assumes caller holds the appropriate lock
2044 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2046 struct nfs4_opendata *opendata;
2049 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2050 NFS4_OPEN_CLAIM_FH);
2051 if (IS_ERR(opendata))
2052 return PTR_ERR(opendata);
2053 ret = nfs4_open_recover(opendata, state);
2055 d_drop(ctx->dentry);
2056 nfs4_opendata_put(opendata);
2060 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2062 struct nfs_server *server = NFS_SERVER(state->inode);
2063 struct nfs4_exception exception = { };
2067 err = _nfs4_open_expired(ctx, state);
2068 trace_nfs4_open_expired(ctx, 0, err);
2069 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2074 case -NFS4ERR_GRACE:
2075 case -NFS4ERR_DELAY:
2076 nfs4_handle_exception(server, err, &exception);
2079 } while (exception.retry);
2084 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2086 struct nfs_open_context *ctx;
2089 ctx = nfs4_state_find_open_context(state);
2092 ret = nfs4_do_open_expired(ctx, state);
2093 put_nfs_open_context(ctx);
2097 #if defined(CONFIG_NFS_V4_1)
2098 static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
2100 struct nfs_server *server = NFS_SERVER(state->inode);
2101 nfs4_stateid *stateid = &state->stateid;
2102 struct nfs_delegation *delegation;
2103 struct rpc_cred *cred = NULL;
2104 int status = -NFS4ERR_BAD_STATEID;
2106 /* If a state reset has been done, test_stateid is unneeded */
2107 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
2110 /* Get the delegation credential for use by test/free_stateid */
2112 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2113 if (delegation != NULL &&
2114 nfs4_stateid_match(&delegation->stateid, stateid)) {
2115 cred = get_rpccred(delegation->cred);
2117 status = nfs41_test_stateid(server, stateid, cred);
2118 trace_nfs4_test_delegation_stateid(state, NULL, status);
2122 if (status != NFS_OK) {
2123 /* Free the stateid unless the server explicitly
2124 * informs us the stateid is unrecognized. */
2125 if (status != -NFS4ERR_BAD_STATEID)
2126 nfs41_free_stateid(server, stateid, cred);
2127 nfs_remove_bad_delegation(state->inode);
2129 write_seqlock(&state->seqlock);
2130 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2131 write_sequnlock(&state->seqlock);
2132 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2140 * nfs41_check_open_stateid - possibly free an open stateid
2142 * @state: NFSv4 state for an inode
2144 * Returns NFS_OK if recovery for this stateid is now finished.
2145 * Otherwise a negative NFS4ERR value is returned.
2147 static int nfs41_check_open_stateid(struct nfs4_state *state)
2149 struct nfs_server *server = NFS_SERVER(state->inode);
2150 nfs4_stateid *stateid = &state->open_stateid;
2151 struct rpc_cred *cred = state->owner->so_cred;
2154 /* If a state reset has been done, test_stateid is unneeded */
2155 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2156 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2157 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2158 return -NFS4ERR_BAD_STATEID;
2160 status = nfs41_test_stateid(server, stateid, cred);
2161 trace_nfs4_test_open_stateid(state, NULL, status);
2162 if (status != NFS_OK) {
2163 /* Free the stateid unless the server explicitly
2164 * informs us the stateid is unrecognized. */
2165 if (status != -NFS4ERR_BAD_STATEID)
2166 nfs41_free_stateid(server, stateid, cred);
2168 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2169 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2170 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2171 clear_bit(NFS_OPEN_STATE, &state->flags);
2176 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2180 nfs41_clear_delegation_stateid(state);
2181 status = nfs41_check_open_stateid(state);
2182 if (status != NFS_OK)
2183 status = nfs4_open_expired(sp, state);
2189 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2190 * fields corresponding to attributes that were used to store the verifier.
2191 * Make sure we clobber those fields in the later setattr call
2193 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2195 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2196 !(sattr->ia_valid & ATTR_ATIME_SET))
2197 sattr->ia_valid |= ATTR_ATIME;
2199 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2200 !(sattr->ia_valid & ATTR_MTIME_SET))
2201 sattr->ia_valid |= ATTR_MTIME;
2204 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2207 struct nfs_open_context *ctx)
2209 struct nfs4_state_owner *sp = opendata->owner;
2210 struct nfs_server *server = sp->so_server;
2211 struct dentry *dentry;
2212 struct nfs4_state *state;
2216 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2218 ret = _nfs4_proc_open(opendata);
2222 state = nfs4_opendata_to_nfs4_state(opendata);
2223 ret = PTR_ERR(state);
2226 if (server->caps & NFS_CAP_POSIX_LOCK)
2227 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2229 dentry = opendata->dentry;
2230 if (dentry->d_inode == NULL) {
2231 /* FIXME: Is this d_drop() ever needed? */
2233 dentry = d_add_unique(dentry, igrab(state->inode));
2234 if (dentry == NULL) {
2235 dentry = opendata->dentry;
2236 } else if (dentry != ctx->dentry) {
2238 ctx->dentry = dget(dentry);
2240 nfs_set_verifier(dentry,
2241 nfs_save_change_attribute(opendata->dir->d_inode));
2244 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2249 if (dentry->d_inode == state->inode) {
2250 nfs_inode_attach_open_context(ctx);
2251 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2252 nfs4_schedule_stateid_recovery(server, state);
2259 * Returns a referenced nfs4_state
2261 static int _nfs4_do_open(struct inode *dir,
2262 struct nfs_open_context *ctx,
2264 struct iattr *sattr,
2265 struct nfs4_label *label,
2268 struct nfs4_state_owner *sp;
2269 struct nfs4_state *state = NULL;
2270 struct nfs_server *server = NFS_SERVER(dir);
2271 struct nfs4_opendata *opendata;
2272 struct dentry *dentry = ctx->dentry;
2273 struct rpc_cred *cred = ctx->cred;
2274 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2275 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
2276 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
2277 struct nfs4_label *olabel = NULL;
2280 /* Protect against reboot recovery conflicts */
2282 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2284 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2287 status = nfs4_recover_expired_lease(server);
2289 goto err_put_state_owner;
2290 if (dentry->d_inode != NULL)
2291 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
2293 if (dentry->d_inode)
2294 claim = NFS4_OPEN_CLAIM_FH;
2295 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
2296 label, claim, GFP_KERNEL);
2297 if (opendata == NULL)
2298 goto err_put_state_owner;
2301 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2302 if (IS_ERR(olabel)) {
2303 status = PTR_ERR(olabel);
2304 goto err_opendata_put;
2308 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2309 if (!opendata->f_attr.mdsthreshold) {
2310 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2311 if (!opendata->f_attr.mdsthreshold)
2312 goto err_free_label;
2314 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
2316 if (dentry->d_inode != NULL)
2317 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
2319 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
2321 goto err_free_label;
2324 if ((opendata->o_arg.open_flags & O_EXCL) &&
2325 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
2326 nfs4_exclusive_attrset(opendata, sattr);
2328 nfs_fattr_init(opendata->o_res.f_attr);
2329 status = nfs4_do_setattr(state->inode, cred,
2330 opendata->o_res.f_attr, sattr,
2331 state, label, olabel);
2333 nfs_setattr_update_inode(state->inode, sattr);
2334 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2335 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2338 if (opendata->file_created)
2339 *opened |= FILE_CREATED;
2341 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
2342 *ctx_th = opendata->f_attr.mdsthreshold;
2343 opendata->f_attr.mdsthreshold = NULL;
2346 nfs4_label_free(olabel);
2348 nfs4_opendata_put(opendata);
2349 nfs4_put_state_owner(sp);
2352 nfs4_label_free(olabel);
2354 nfs4_opendata_put(opendata);
2355 err_put_state_owner:
2356 nfs4_put_state_owner(sp);
2362 static struct nfs4_state *nfs4_do_open(struct inode *dir,
2363 struct nfs_open_context *ctx,
2365 struct iattr *sattr,
2366 struct nfs4_label *label,
2369 struct nfs_server *server = NFS_SERVER(dir);
2370 struct nfs4_exception exception = { };
2371 struct nfs4_state *res;
2375 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
2377 trace_nfs4_open_file(ctx, flags, status);
2380 /* NOTE: BAD_SEQID means the server and client disagree about the
2381 * book-keeping w.r.t. state-changing operations
2382 * (OPEN/CLOSE/LOCK/LOCKU...)
2383 * It is actually a sign of a bug on the client or on the server.
2385 * If we receive a BAD_SEQID error in the particular case of
2386 * doing an OPEN, we assume that nfs_increment_open_seqid() will
2387 * have unhashed the old state_owner for us, and that we can
2388 * therefore safely retry using a new one. We should still warn
2389 * the user though...
2391 if (status == -NFS4ERR_BAD_SEQID) {
2392 pr_warn_ratelimited("NFS: v4 server %s "
2393 " returned a bad sequence-id error!\n",
2394 NFS_SERVER(dir)->nfs_client->cl_hostname);
2395 exception.retry = 1;
2399 * BAD_STATEID on OPEN means that the server cancelled our
2400 * state before it received the OPEN_CONFIRM.
2401 * Recover by retrying the request as per the discussion
2402 * on Page 181 of RFC3530.
2404 if (status == -NFS4ERR_BAD_STATEID) {
2405 exception.retry = 1;
2408 if (status == -EAGAIN) {
2409 /* We must have found a delegation */
2410 exception.retry = 1;
2413 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2415 res = ERR_PTR(nfs4_handle_exception(server,
2416 status, &exception));
2417 } while (exception.retry);
2421 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2422 struct nfs_fattr *fattr, struct iattr *sattr,
2423 struct nfs4_state *state, struct nfs4_label *ilabel,
2424 struct nfs4_label *olabel)
2426 struct nfs_server *server = NFS_SERVER(inode);
2427 struct nfs_setattrargs arg = {
2428 .fh = NFS_FH(inode),
2431 .bitmask = server->attr_bitmask,
2434 struct nfs_setattrres res = {
2439 struct rpc_message msg = {
2440 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2445 unsigned long timestamp = jiffies;
2450 arg.bitmask = nfs4_bitmask(server, ilabel);
2452 arg.bitmask = nfs4_bitmask(server, olabel);
2454 nfs_fattr_init(fattr);
2456 /* Servers should only apply open mode checks for file size changes */
2457 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2458 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2460 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2461 /* Use that stateid */
2462 } else if (truncate && state != NULL) {
2463 struct nfs_lockowner lockowner = {
2464 .l_owner = current->files,
2465 .l_pid = current->tgid,
2467 if (!nfs4_valid_open_stateid(state))
2469 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2470 &lockowner) == -EIO)
2473 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
2475 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2476 if (status == 0 && state != NULL)
2477 renew_lease(server, timestamp);
2481 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2482 struct nfs_fattr *fattr, struct iattr *sattr,
2483 struct nfs4_state *state, struct nfs4_label *ilabel,
2484 struct nfs4_label *olabel)
2486 struct nfs_server *server = NFS_SERVER(inode);
2487 struct nfs4_exception exception = {
2493 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
2494 trace_nfs4_setattr(inode, err);
2496 case -NFS4ERR_OPENMODE:
2497 if (!(sattr->ia_valid & ATTR_SIZE)) {
2498 pr_warn_once("NFSv4: server %s is incorrectly "
2499 "applying open mode checks to "
2500 "a SETATTR that is not "
2501 "changing file size.\n",
2502 server->nfs_client->cl_hostname);
2504 if (state && !(state->state & FMODE_WRITE)) {
2506 if (sattr->ia_valid & ATTR_OPEN)
2511 err = nfs4_handle_exception(server, err, &exception);
2512 } while (exception.retry);
2517 struct nfs4_closedata {
2518 struct inode *inode;
2519 struct nfs4_state *state;
2520 struct nfs_closeargs arg;
2521 struct nfs_closeres res;
2522 struct nfs_fattr fattr;
2523 unsigned long timestamp;
2528 static void nfs4_free_closedata(void *data)
2530 struct nfs4_closedata *calldata = data;
2531 struct nfs4_state_owner *sp = calldata->state->owner;
2532 struct super_block *sb = calldata->state->inode->i_sb;
2535 pnfs_roc_release(calldata->state->inode);
2536 nfs4_put_open_state(calldata->state);
2537 nfs_free_seqid(calldata->arg.seqid);
2538 nfs4_put_state_owner(sp);
2539 nfs_sb_deactive(sb);
2543 static void nfs4_close_done(struct rpc_task *task, void *data)
2545 struct nfs4_closedata *calldata = data;
2546 struct nfs4_state *state = calldata->state;
2547 struct nfs_server *server = NFS_SERVER(calldata->inode);
2549 dprintk("%s: begin!\n", __func__);
2550 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2552 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
2553 /* hmm. we are done with the inode, and in the process of freeing
2554 * the state_owner. we keep this around to process errors
2556 switch (task->tk_status) {
2559 pnfs_roc_set_barrier(state->inode,
2560 calldata->roc_barrier);
2561 nfs_clear_open_stateid(state, &calldata->res.stateid, 0);
2562 renew_lease(server, calldata->timestamp);
2564 case -NFS4ERR_ADMIN_REVOKED:
2565 case -NFS4ERR_STALE_STATEID:
2566 case -NFS4ERR_OLD_STATEID:
2567 case -NFS4ERR_BAD_STATEID:
2568 case -NFS4ERR_EXPIRED:
2569 if (calldata->arg.fmode == 0)
2572 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
2573 rpc_restart_call_prepare(task);
2577 nfs_clear_open_stateid(state, NULL, calldata->arg.fmode);
2579 nfs_release_seqid(calldata->arg.seqid);
2580 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2581 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2584 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2586 struct nfs4_closedata *calldata = data;
2587 struct nfs4_state *state = calldata->state;
2588 struct inode *inode = calldata->inode;
2591 dprintk("%s: begin!\n", __func__);
2592 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2595 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2596 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
2597 spin_lock(&state->owner->so_lock);
2598 /* Calculate the change in open mode */
2599 if (state->n_rdwr == 0) {
2600 if (state->n_rdonly == 0) {
2601 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2602 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2603 calldata->arg.fmode &= ~FMODE_READ;
2605 if (state->n_wronly == 0) {
2606 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2607 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2608 calldata->arg.fmode &= ~FMODE_WRITE;
2611 if (!nfs4_valid_open_stateid(state))
2613 spin_unlock(&state->owner->so_lock);
2616 /* Note: exit _without_ calling nfs4_close_done */
2620 if (calldata->arg.fmode == 0) {
2621 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2622 if (calldata->roc &&
2623 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2624 nfs_release_seqid(calldata->arg.seqid);
2629 nfs_fattr_init(calldata->res.fattr);
2630 calldata->timestamp = jiffies;
2631 if (nfs4_setup_sequence(NFS_SERVER(inode),
2632 &calldata->arg.seq_args,
2633 &calldata->res.seq_res,
2635 nfs_release_seqid(calldata->arg.seqid);
2636 dprintk("%s: done!\n", __func__);
2639 task->tk_action = NULL;
2641 nfs4_sequence_done(task, &calldata->res.seq_res);
2644 static const struct rpc_call_ops nfs4_close_ops = {
2645 .rpc_call_prepare = nfs4_close_prepare,
2646 .rpc_call_done = nfs4_close_done,
2647 .rpc_release = nfs4_free_closedata,
2651 * It is possible for data to be read/written from a mem-mapped file
2652 * after the sys_close call (which hits the vfs layer as a flush).
2653 * This means that we can't safely call nfsv4 close on a file until
2654 * the inode is cleared. This in turn means that we are not good
2655 * NFSv4 citizens - we do not indicate to the server to update the file's
2656 * share state even when we are done with one of the three share
2657 * stateid's in the inode.
2659 * NOTE: Caller must be holding the sp->so_owner semaphore!
2661 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
2663 struct nfs_server *server = NFS_SERVER(state->inode);
2664 struct nfs4_closedata *calldata;
2665 struct nfs4_state_owner *sp = state->owner;
2666 struct rpc_task *task;
2667 struct rpc_message msg = {
2668 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2669 .rpc_cred = state->owner->so_cred,
2671 struct rpc_task_setup task_setup_data = {
2672 .rpc_client = server->client,
2673 .rpc_message = &msg,
2674 .callback_ops = &nfs4_close_ops,
2675 .workqueue = nfsiod_workqueue,
2676 .flags = RPC_TASK_ASYNC,
2678 int status = -ENOMEM;
2680 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2681 &task_setup_data.rpc_client, &msg);
2683 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2684 if (calldata == NULL)
2686 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2687 calldata->inode = state->inode;
2688 calldata->state = state;
2689 calldata->arg.fh = NFS_FH(state->inode);
2690 calldata->arg.stateid = &state->open_stateid;
2691 /* Serialization for the sequence id */
2692 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2693 if (calldata->arg.seqid == NULL)
2694 goto out_free_calldata;
2695 calldata->arg.fmode = 0;
2696 calldata->arg.bitmask = server->cache_consistency_bitmask;
2697 calldata->res.fattr = &calldata->fattr;
2698 calldata->res.seqid = calldata->arg.seqid;
2699 calldata->res.server = server;
2700 calldata->roc = pnfs_roc(state->inode);
2701 nfs_sb_active(calldata->inode->i_sb);
2703 msg.rpc_argp = &calldata->arg;
2704 msg.rpc_resp = &calldata->res;
2705 task_setup_data.callback_data = calldata;
2706 task = rpc_run_task(&task_setup_data);
2708 return PTR_ERR(task);
2711 status = rpc_wait_for_completion_task(task);
2717 nfs4_put_open_state(state);
2718 nfs4_put_state_owner(sp);
2722 static struct inode *
2723 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2724 int open_flags, struct iattr *attr, int *opened)
2726 struct nfs4_state *state;
2727 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2729 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
2731 /* Protect against concurrent sillydeletes */
2732 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
2734 nfs4_label_release_security(label);
2737 return ERR_CAST(state);
2738 return state->inode;
2741 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2743 if (ctx->state == NULL)
2746 nfs4_close_sync(ctx->state, ctx->mode);
2748 nfs4_close_state(ctx->state, ctx->mode);
2751 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2752 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
2753 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
2755 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2757 struct nfs4_server_caps_arg args = {
2760 struct nfs4_server_caps_res res = {};
2761 struct rpc_message msg = {
2762 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2768 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2770 /* Sanity check the server answers */
2771 switch (server->nfs_client->cl_minorversion) {
2773 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2774 res.attr_bitmask[2] = 0;
2777 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2780 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2782 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2783 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2784 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2785 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2786 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2787 NFS_CAP_CTIME|NFS_CAP_MTIME|
2788 NFS_CAP_SECURITY_LABEL);
2789 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2790 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2791 server->caps |= NFS_CAP_ACLS;
2792 if (res.has_links != 0)
2793 server->caps |= NFS_CAP_HARDLINKS;
2794 if (res.has_symlinks != 0)
2795 server->caps |= NFS_CAP_SYMLINKS;
2796 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2797 server->caps |= NFS_CAP_FILEID;
2798 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2799 server->caps |= NFS_CAP_MODE;
2800 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2801 server->caps |= NFS_CAP_NLINK;
2802 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2803 server->caps |= NFS_CAP_OWNER;
2804 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2805 server->caps |= NFS_CAP_OWNER_GROUP;
2806 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2807 server->caps |= NFS_CAP_ATIME;
2808 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2809 server->caps |= NFS_CAP_CTIME;
2810 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2811 server->caps |= NFS_CAP_MTIME;
2812 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
2813 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2814 server->caps |= NFS_CAP_SECURITY_LABEL;
2816 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2817 sizeof(server->attr_bitmask));
2818 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2820 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2821 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2822 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2823 server->cache_consistency_bitmask[2] = 0;
2824 server->acl_bitmask = res.acl_bitmask;
2825 server->fh_expire_type = res.fh_expire_type;
2831 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2833 struct nfs4_exception exception = { };
2836 err = nfs4_handle_exception(server,
2837 _nfs4_server_capabilities(server, fhandle),
2839 } while (exception.retry);
2843 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2844 struct nfs_fsinfo *info)
2847 struct nfs4_lookup_root_arg args = {
2850 struct nfs4_lookup_res res = {
2852 .fattr = info->fattr,
2855 struct rpc_message msg = {
2856 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2861 bitmask[0] = nfs4_fattr_bitmap[0];
2862 bitmask[1] = nfs4_fattr_bitmap[1];
2864 * Process the label in the upcoming getfattr
2866 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2868 nfs_fattr_init(info->fattr);
2869 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2872 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2873 struct nfs_fsinfo *info)
2875 struct nfs4_exception exception = { };
2878 err = _nfs4_lookup_root(server, fhandle, info);
2879 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
2882 case -NFS4ERR_WRONGSEC:
2885 err = nfs4_handle_exception(server, err, &exception);
2887 } while (exception.retry);
2892 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2893 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2895 struct rpc_auth_create_args auth_args = {
2896 .pseudoflavor = flavor,
2898 struct rpc_auth *auth;
2901 auth = rpcauth_create(&auth_args, server->client);
2906 ret = nfs4_lookup_root(server, fhandle, info);
2912 * Retry pseudoroot lookup with various security flavors. We do this when:
2914 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2915 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2917 * Returns zero on success, or a negative NFS4ERR value, or a
2918 * negative errno value.
2920 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2921 struct nfs_fsinfo *info)
2923 /* Per 3530bis 15.33.5 */
2924 static const rpc_authflavor_t flav_array[] = {
2928 RPC_AUTH_UNIX, /* courtesy */
2931 int status = -EPERM;
2934 if (server->auth_info.flavor_len > 0) {
2935 /* try each flavor specified by user */
2936 for (i = 0; i < server->auth_info.flavor_len; i++) {
2937 status = nfs4_lookup_root_sec(server, fhandle, info,
2938 server->auth_info.flavors[i]);
2939 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2944 /* no flavors specified by user, try default list */
2945 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
2946 status = nfs4_lookup_root_sec(server, fhandle, info,
2948 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2955 * -EACCESS could mean that the user doesn't have correct permissions
2956 * to access the mount. It could also mean that we tried to mount
2957 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2958 * existing mount programs don't handle -EACCES very well so it should
2959 * be mapped to -EPERM instead.
2961 if (status == -EACCES)
2966 static int nfs4_do_find_root_sec(struct nfs_server *server,
2967 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2969 int mv = server->nfs_client->cl_minorversion;
2970 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2974 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2975 * @server: initialized nfs_server handle
2976 * @fhandle: we fill in the pseudo-fs root file handle
2977 * @info: we fill in an FSINFO struct
2978 * @auth_probe: probe the auth flavours
2980 * Returns zero on success, or a negative errno.
2982 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2983 struct nfs_fsinfo *info,
2988 switch (auth_probe) {
2990 status = nfs4_lookup_root(server, fhandle, info);
2991 if (status != -NFS4ERR_WRONGSEC)
2994 status = nfs4_do_find_root_sec(server, fhandle, info);
2998 status = nfs4_server_capabilities(server, fhandle);
3000 status = nfs4_do_fsinfo(server, fhandle, info);
3002 return nfs4_map_errors(status);
3005 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3006 struct nfs_fsinfo *info)
3009 struct nfs_fattr *fattr = info->fattr;
3010 struct nfs4_label *label = NULL;
3012 error = nfs4_server_capabilities(server, mntfh);
3014 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3018 label = nfs4_label_alloc(server, GFP_KERNEL);
3020 return PTR_ERR(label);
3022 error = nfs4_proc_getattr(server, mntfh, fattr, label);
3024 dprintk("nfs4_get_root: getattr error = %d\n", -error);
3025 goto err_free_label;
3028 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3029 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3030 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3033 nfs4_label_free(label);
3039 * Get locations and (maybe) other attributes of a referral.
3040 * Note that we'll actually follow the referral later when
3041 * we detect fsid mismatch in inode revalidation
3043 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3044 const struct qstr *name, struct nfs_fattr *fattr,
3045 struct nfs_fh *fhandle)
3047 int status = -ENOMEM;
3048 struct page *page = NULL;
3049 struct nfs4_fs_locations *locations = NULL;
3051 page = alloc_page(GFP_KERNEL);
3054 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3055 if (locations == NULL)
3058 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
3063 * If the fsid didn't change, this is a migration event, not a
3064 * referral. Cause us to drop into the exception handler, which
3065 * will kick off migration recovery.
3067 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3068 dprintk("%s: server did not return a different fsid for"
3069 " a referral at %s\n", __func__, name->name);
3070 status = -NFS4ERR_MOVED;
3073 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3074 nfs_fixup_referral_attributes(&locations->fattr);
3076 /* replace the lookup nfs_fattr with the locations nfs_fattr */
3077 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
3078 memset(fhandle, 0, sizeof(struct nfs_fh));
3086 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3087 struct nfs_fattr *fattr, struct nfs4_label *label)
3089 struct nfs4_getattr_arg args = {
3091 .bitmask = server->attr_bitmask,
3093 struct nfs4_getattr_res res = {
3098 struct rpc_message msg = {
3099 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3104 args.bitmask = nfs4_bitmask(server, label);
3106 nfs_fattr_init(fattr);
3107 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3111 struct nfs_fattr *fattr, struct nfs4_label *label)
3113 struct nfs4_exception exception = { };
3116 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3117 trace_nfs4_getattr(server, fhandle, fattr, err);
3118 err = nfs4_handle_exception(server, err,
3120 } while (exception.retry);
3125 * The file is not closed if it is opened due to the a request to change
3126 * the size of the file. The open call will not be needed once the
3127 * VFS layer lookup-intents are implemented.
3129 * Close is called when the inode is destroyed.
3130 * If we haven't opened the file for O_WRONLY, we
3131 * need to in the size_change case to obtain a stateid.
3134 * Because OPEN is always done by name in nfsv4, it is
3135 * possible that we opened a different file by the same
3136 * name. We can recognize this race condition, but we
3137 * can't do anything about it besides returning an error.
3139 * This will be fixed with VFS changes (lookup-intent).
3142 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3143 struct iattr *sattr)
3145 struct inode *inode = dentry->d_inode;
3146 struct rpc_cred *cred = NULL;
3147 struct nfs4_state *state = NULL;
3148 struct nfs4_label *label = NULL;
3151 if (pnfs_ld_layoutret_on_setattr(inode))
3152 pnfs_commit_and_return_layout(inode);
3154 nfs_fattr_init(fattr);
3156 /* Deal with open(O_TRUNC) */
3157 if (sattr->ia_valid & ATTR_OPEN)
3158 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
3160 /* Optimization: if the end result is no change, don't RPC */
3161 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
3164 /* Search for an existing open(O_WRITE) file */
3165 if (sattr->ia_valid & ATTR_FILE) {
3166 struct nfs_open_context *ctx;
3168 ctx = nfs_file_open_context(sattr->ia_file);
3175 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3177 return PTR_ERR(label);
3179 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
3181 nfs_setattr_update_inode(inode, sattr);
3182 nfs_setsecurity(inode, fattr, label);
3184 nfs4_label_free(label);
3188 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3189 const struct qstr *name, struct nfs_fh *fhandle,
3190 struct nfs_fattr *fattr, struct nfs4_label *label)
3192 struct nfs_server *server = NFS_SERVER(dir);
3194 struct nfs4_lookup_arg args = {
3195 .bitmask = server->attr_bitmask,
3196 .dir_fh = NFS_FH(dir),
3199 struct nfs4_lookup_res res = {
3205 struct rpc_message msg = {
3206 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3211 args.bitmask = nfs4_bitmask(server, label);
3213 nfs_fattr_init(fattr);
3215 dprintk("NFS call lookup %s\n", name->name);
3216 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
3217 dprintk("NFS reply lookup: %d\n", status);
3221 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
3223 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
3224 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
3225 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3229 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3230 struct qstr *name, struct nfs_fh *fhandle,
3231 struct nfs_fattr *fattr, struct nfs4_label *label)
3233 struct nfs4_exception exception = { };
3234 struct rpc_clnt *client = *clnt;
3237 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
3238 trace_nfs4_lookup(dir, name, err);
3240 case -NFS4ERR_BADNAME:
3243 case -NFS4ERR_MOVED:
3244 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
3246 case -NFS4ERR_WRONGSEC:
3248 if (client != *clnt)
3250 client = nfs4_negotiate_security(client, dir, name);
3252 return PTR_ERR(client);
3254 exception.retry = 1;
3257 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3259 } while (exception.retry);
3264 else if (client != *clnt)
3265 rpc_shutdown_client(client);
3270 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
3271 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3272 struct nfs4_label *label)
3275 struct rpc_clnt *client = NFS_CLIENT(dir);
3277 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
3278 if (client != NFS_CLIENT(dir)) {
3279 rpc_shutdown_client(client);
3280 nfs_fixup_secinfo_attributes(fattr);
3286 nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3287 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3289 struct rpc_clnt *client = NFS_CLIENT(dir);
3292 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
3294 return ERR_PTR(status);
3295 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
3298 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3300 struct nfs_server *server = NFS_SERVER(inode);
3301 struct nfs4_accessargs args = {
3302 .fh = NFS_FH(inode),
3303 .bitmask = server->cache_consistency_bitmask,
3305 struct nfs4_accessres res = {
3308 struct rpc_message msg = {
3309 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3312 .rpc_cred = entry->cred,
3314 int mode = entry->mask;
3318 * Determine which access bits we want to ask for...
3320 if (mode & MAY_READ)
3321 args.access |= NFS4_ACCESS_READ;
3322 if (S_ISDIR(inode->i_mode)) {
3323 if (mode & MAY_WRITE)
3324 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3325 if (mode & MAY_EXEC)
3326 args.access |= NFS4_ACCESS_LOOKUP;
3328 if (mode & MAY_WRITE)
3329 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3330 if (mode & MAY_EXEC)
3331 args.access |= NFS4_ACCESS_EXECUTE;
3334 res.fattr = nfs_alloc_fattr();
3335 if (res.fattr == NULL)
3338 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3340 nfs_access_set_mask(entry, res.access);
3341 nfs_refresh_inode(inode, res.fattr);
3343 nfs_free_fattr(res.fattr);
3347 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3349 struct nfs4_exception exception = { };
3352 err = _nfs4_proc_access(inode, entry);
3353 trace_nfs4_access(inode, err);
3354 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3356 } while (exception.retry);
3361 * TODO: For the time being, we don't try to get any attributes
3362 * along with any of the zero-copy operations READ, READDIR,
3365 * In the case of the first three, we want to put the GETATTR
3366 * after the read-type operation -- this is because it is hard
3367 * to predict the length of a GETATTR response in v4, and thus
3368 * align the READ data correctly. This means that the GETATTR
3369 * may end up partially falling into the page cache, and we should
3370 * shift it into the 'tail' of the xdr_buf before processing.
3371 * To do this efficiently, we need to know the total length
3372 * of data received, which doesn't seem to be available outside
3375 * In the case of WRITE, we also want to put the GETATTR after
3376 * the operation -- in this case because we want to make sure
3377 * we get the post-operation mtime and size.
3379 * Both of these changes to the XDR layer would in fact be quite
3380 * minor, but I decided to leave them for a subsequent patch.
3382 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3383 unsigned int pgbase, unsigned int pglen)
3385 struct nfs4_readlink args = {
3386 .fh = NFS_FH(inode),
3391 struct nfs4_readlink_res res;
3392 struct rpc_message msg = {
3393 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3398 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
3401 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3402 unsigned int pgbase, unsigned int pglen)
3404 struct nfs4_exception exception = { };
3407 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3408 trace_nfs4_readlink(inode, err);
3409 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3411 } while (exception.retry);
3416 * This is just for mknod. open(O_CREAT) will always do ->open_context().
3419 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
3422 struct nfs4_label l, *ilabel = NULL;
3423 struct nfs_open_context *ctx;
3424 struct nfs4_state *state;
3428 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3430 return PTR_ERR(ctx);
3432 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3434 sattr->ia_mode &= ~current_umask();
3435 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
3436 if (IS_ERR(state)) {
3437 status = PTR_ERR(state);
3441 nfs4_label_release_security(ilabel);
3442 put_nfs_open_context(ctx);
3446 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3448 struct nfs_server *server = NFS_SERVER(dir);
3449 struct nfs_removeargs args = {
3453 struct nfs_removeres res = {
3456 struct rpc_message msg = {
3457 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3463 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
3465 update_changeattr(dir, &res.cinfo);
3469 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3471 struct nfs4_exception exception = { };
3474 err = _nfs4_proc_remove(dir, name);
3475 trace_nfs4_remove(dir, name, err);
3476 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3478 } while (exception.retry);
3482 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
3484 struct nfs_server *server = NFS_SERVER(dir);
3485 struct nfs_removeargs *args = msg->rpc_argp;
3486 struct nfs_removeres *res = msg->rpc_resp;
3488 res->server = server;
3489 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
3490 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
3492 nfs_fattr_init(res->dir_attr);
3495 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3497 nfs4_setup_sequence(NFS_SERVER(data->dir),
3498 &data->args.seq_args,
3503 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
3505 struct nfs_unlinkdata *data = task->tk_calldata;
3506 struct nfs_removeres *res = &data->res;
3508 if (!nfs4_sequence_done(task, &res->seq_res))
3510 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3512 update_changeattr(dir, &res->cinfo);
3516 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3518 struct nfs_server *server = NFS_SERVER(dir);
3519 struct nfs_renameargs *arg = msg->rpc_argp;
3520 struct nfs_renameres *res = msg->rpc_resp;
3522 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
3523 res->server = server;
3524 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
3527 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3529 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3530 &data->args.seq_args,
3535 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3536 struct inode *new_dir)
3538 struct nfs_renamedata *data = task->tk_calldata;
3539 struct nfs_renameres *res = &data->res;
3541 if (!nfs4_sequence_done(task, &res->seq_res))
3543 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3546 update_changeattr(old_dir, &res->old_cinfo);
3547 update_changeattr(new_dir, &res->new_cinfo);
3551 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3553 struct nfs_server *server = NFS_SERVER(inode);
3554 struct nfs4_link_arg arg = {
3555 .fh = NFS_FH(inode),
3556 .dir_fh = NFS_FH(dir),
3558 .bitmask = server->attr_bitmask,
3560 struct nfs4_link_res res = {
3564 struct rpc_message msg = {
3565 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3569 int status = -ENOMEM;
3571 res.fattr = nfs_alloc_fattr();
3572 if (res.fattr == NULL)
3575 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3576 if (IS_ERR(res.label)) {
3577 status = PTR_ERR(res.label);
3580 arg.bitmask = nfs4_bitmask(server, res.label);
3582 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3584 update_changeattr(dir, &res.cinfo);
3585 status = nfs_post_op_update_inode(inode, res.fattr);
3587 nfs_setsecurity(inode, res.fattr, res.label);
3591 nfs4_label_free(res.label);
3594 nfs_free_fattr(res.fattr);
3598 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3600 struct nfs4_exception exception = { };
3603 err = nfs4_handle_exception(NFS_SERVER(inode),
3604 _nfs4_proc_link(inode, dir, name),
3606 } while (exception.retry);
3610 struct nfs4_createdata {
3611 struct rpc_message msg;
3612 struct nfs4_create_arg arg;
3613 struct nfs4_create_res res;
3615 struct nfs_fattr fattr;
3616 struct nfs4_label *label;
3619 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3620 struct qstr *name, struct iattr *sattr, u32 ftype)
3622 struct nfs4_createdata *data;
3624 data = kzalloc(sizeof(*data), GFP_KERNEL);
3626 struct nfs_server *server = NFS_SERVER(dir);
3628 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3629 if (IS_ERR(data->label))
3632 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3633 data->msg.rpc_argp = &data->arg;
3634 data->msg.rpc_resp = &data->res;
3635 data->arg.dir_fh = NFS_FH(dir);
3636 data->arg.server = server;
3637 data->arg.name = name;
3638 data->arg.attrs = sattr;
3639 data->arg.ftype = ftype;
3640 data->arg.bitmask = nfs4_bitmask(server, data->label);
3641 data->res.server = server;
3642 data->res.fh = &data->fh;
3643 data->res.fattr = &data->fattr;
3644 data->res.label = data->label;
3645 nfs_fattr_init(data->res.fattr);
3653 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3655 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3656 &data->arg.seq_args, &data->res.seq_res, 1);
3658 update_changeattr(dir, &data->res.dir_cinfo);
3659 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
3664 static void nfs4_free_createdata(struct nfs4_createdata *data)
3666 nfs4_label_free(data->label);
3670 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3671 struct page *page, unsigned int len, struct iattr *sattr,
3672 struct nfs4_label *label)
3674 struct nfs4_createdata *data;
3675 int status = -ENAMETOOLONG;
3677 if (len > NFS4_MAXPATHLEN)
3681 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3685 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3686 data->arg.u.symlink.pages = &page;
3687 data->arg.u.symlink.len = len;
3688 data->arg.label = label;
3690 status = nfs4_do_create(dir, dentry, data);
3692 nfs4_free_createdata(data);
3697 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3698 struct page *page, unsigned int len, struct iattr *sattr)
3700 struct nfs4_exception exception = { };
3701 struct nfs4_label l, *label = NULL;
3704 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3707 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3708 trace_nfs4_symlink(dir, &dentry->d_name, err);
3709 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3711 } while (exception.retry);
3713 nfs4_label_release_security(label);
3717 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3718 struct iattr *sattr, struct nfs4_label *label)
3720 struct nfs4_createdata *data;
3721 int status = -ENOMEM;
3723 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3727 data->arg.label = label;
3728 status = nfs4_do_create(dir, dentry, data);
3730 nfs4_free_createdata(data);
3735 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3736 struct iattr *sattr)
3738 struct nfs4_exception exception = { };
3739 struct nfs4_label l, *label = NULL;
3742 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3744 sattr->ia_mode &= ~current_umask();
3746 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3747 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3748 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3750 } while (exception.retry);
3751 nfs4_label_release_security(label);
3756 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3757 u64 cookie, struct page **pages, unsigned int count, int plus)
3759 struct inode *dir = dentry->d_inode;
3760 struct nfs4_readdir_arg args = {
3765 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3768 struct nfs4_readdir_res res;
3769 struct rpc_message msg = {
3770 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3777 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3779 (unsigned long long)cookie);
3780 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
3781 res.pgbase = args.pgbase;
3782 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3784 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
3785 status += args.pgbase;
3788 nfs_invalidate_atime(dir);
3790 dprintk("%s: returns %d\n", __func__, status);
3794 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3795 u64 cookie, struct page **pages, unsigned int count, int plus)
3797 struct nfs4_exception exception = { };
3800 err = _nfs4_proc_readdir(dentry, cred, cookie,
3801 pages, count, plus);
3802 trace_nfs4_readdir(dentry->d_inode, err);
3803 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
3805 } while (exception.retry);
3809 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3810 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
3812 struct nfs4_createdata *data;
3813 int mode = sattr->ia_mode;
3814 int status = -ENOMEM;
3816 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3821 data->arg.ftype = NF4FIFO;
3822 else if (S_ISBLK(mode)) {
3823 data->arg.ftype = NF4BLK;
3824 data->arg.u.device.specdata1 = MAJOR(rdev);
3825 data->arg.u.device.specdata2 = MINOR(rdev);
3827 else if (S_ISCHR(mode)) {
3828 data->arg.ftype = NF4CHR;
3829 data->arg.u.device.specdata1 = MAJOR(rdev);
3830 data->arg.u.device.specdata2 = MINOR(rdev);
3831 } else if (!S_ISSOCK(mode)) {
3836 data->arg.label = label;
3837 status = nfs4_do_create(dir, dentry, data);
3839 nfs4_free_createdata(data);
3844 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3845 struct iattr *sattr, dev_t rdev)
3847 struct nfs4_exception exception = { };
3848 struct nfs4_label l, *label = NULL;
3851 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3853 sattr->ia_mode &= ~current_umask();
3855 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3856 trace_nfs4_mknod(dir, &dentry->d_name, err);
3857 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3859 } while (exception.retry);
3861 nfs4_label_release_security(label);
3866 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3867 struct nfs_fsstat *fsstat)
3869 struct nfs4_statfs_arg args = {
3871 .bitmask = server->attr_bitmask,
3873 struct nfs4_statfs_res res = {
3876 struct rpc_message msg = {
3877 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3882 nfs_fattr_init(fsstat->fattr);
3883 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3886 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3888 struct nfs4_exception exception = { };
3891 err = nfs4_handle_exception(server,
3892 _nfs4_proc_statfs(server, fhandle, fsstat),
3894 } while (exception.retry);
3898 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3899 struct nfs_fsinfo *fsinfo)
3901 struct nfs4_fsinfo_arg args = {
3903 .bitmask = server->attr_bitmask,
3905 struct nfs4_fsinfo_res res = {
3908 struct rpc_message msg = {
3909 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3914 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3917 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3919 struct nfs4_exception exception = { };
3920 unsigned long now = jiffies;
3924 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
3925 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
3927 struct nfs_client *clp = server->nfs_client;
3929 spin_lock(&clp->cl_lock);
3930 clp->cl_lease_time = fsinfo->lease_time * HZ;
3931 clp->cl_last_renewal = now;
3932 spin_unlock(&clp->cl_lock);
3935 err = nfs4_handle_exception(server, err, &exception);
3936 } while (exception.retry);
3940 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3944 nfs_fattr_init(fsinfo->fattr);
3945 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
3947 /* block layout checks this! */
3948 server->pnfs_blksize = fsinfo->blksize;
3949 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
3955 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3956 struct nfs_pathconf *pathconf)
3958 struct nfs4_pathconf_arg args = {
3960 .bitmask = server->attr_bitmask,
3962 struct nfs4_pathconf_res res = {
3963 .pathconf = pathconf,
3965 struct rpc_message msg = {
3966 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3971 /* None of the pathconf attributes are mandatory to implement */
3972 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3973 memset(pathconf, 0, sizeof(*pathconf));
3977 nfs_fattr_init(pathconf->fattr);
3978 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3981 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3982 struct nfs_pathconf *pathconf)
3984 struct nfs4_exception exception = { };
3988 err = nfs4_handle_exception(server,
3989 _nfs4_proc_pathconf(server, fhandle, pathconf),
3991 } while (exception.retry);
3995 int nfs4_set_rw_stateid(nfs4_stateid *stateid,
3996 const struct nfs_open_context *ctx,
3997 const struct nfs_lock_context *l_ctx,
4000 const struct nfs_lockowner *lockowner = NULL;
4003 lockowner = &l_ctx->lockowner;
4004 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
4006 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4008 static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4009 const struct nfs_open_context *ctx,
4010 const struct nfs_lock_context *l_ctx,
4013 nfs4_stateid current_stateid;
4015 /* If the current stateid represents a lost lock, then exit */
4016 if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode) == -EIO)
4018 return nfs4_stateid_match(stateid, ¤t_stateid);
4021 static bool nfs4_error_stateid_expired(int err)
4024 case -NFS4ERR_DELEG_REVOKED:
4025 case -NFS4ERR_ADMIN_REVOKED:
4026 case -NFS4ERR_BAD_STATEID:
4027 case -NFS4ERR_STALE_STATEID:
4028 case -NFS4ERR_OLD_STATEID:
4029 case -NFS4ERR_OPENMODE:
4030 case -NFS4ERR_EXPIRED:
4036 void __nfs4_read_done_cb(struct nfs_pgio_data *data)
4038 nfs_invalidate_atime(data->header->inode);
4041 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_data *data)
4043 struct nfs_server *server = NFS_SERVER(data->header->inode);
4045 trace_nfs4_read(data, task->tk_status);
4046 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
4047 rpc_restart_call_prepare(task);
4051 __nfs4_read_done_cb(data);
4052 if (task->tk_status > 0)
4053 renew_lease(server, data->timestamp);
4057 static bool nfs4_read_stateid_changed(struct rpc_task *task,
4058 struct nfs_pgio_args *args)
4061 if (!nfs4_error_stateid_expired(task->tk_status) ||
4062 nfs4_stateid_is_current(&args->stateid,
4067 rpc_restart_call_prepare(task);
4071 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_data *data)
4074 dprintk("--> %s\n", __func__);
4076 if (!nfs4_sequence_done(task, &data->res.seq_res))
4078 if (nfs4_read_stateid_changed(task, &data->args))
4080 return data->pgio_done_cb ? data->pgio_done_cb(task, data) :
4081 nfs4_read_done_cb(task, data);
4084 static void nfs4_proc_read_setup(struct nfs_pgio_data *data, struct rpc_message *msg)
4086 data->timestamp = jiffies;
4087 data->pgio_done_cb = nfs4_read_done_cb;
4088 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
4089 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
4092 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task, struct nfs_pgio_data *data)
4094 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
4095 &data->args.seq_args,
4099 if (nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4100 data->args.lock_context, data->header->rw_ops->rw_mode) == -EIO)
4102 if (unlikely(test_bit(NFS_CONTEXT_BAD, &data->args.context->flags)))
4107 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_pgio_data *data)
4109 struct inode *inode = data->header->inode;
4111 trace_nfs4_write(data, task->tk_status);
4112 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
4113 rpc_restart_call_prepare(task);
4116 if (task->tk_status >= 0) {
4117 renew_lease(NFS_SERVER(inode), data->timestamp);
4118 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4123 static bool nfs4_write_stateid_changed(struct rpc_task *task,
4124 struct nfs_pgio_args *args)
4127 if (!nfs4_error_stateid_expired(task->tk_status) ||
4128 nfs4_stateid_is_current(&args->stateid,
4133 rpc_restart_call_prepare(task);
4137 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_data *data)
4139 if (!nfs4_sequence_done(task, &data->res.seq_res))
4141 if (nfs4_write_stateid_changed(task, &data->args))
4143 return data->pgio_done_cb ? data->pgio_done_cb(task, data) :
4144 nfs4_write_done_cb(task, data);
4148 bool nfs4_write_need_cache_consistency_data(const struct nfs_pgio_data *data)
4150 const struct nfs_pgio_header *hdr = data->header;
4152 /* Don't request attributes for pNFS or O_DIRECT writes */
4153 if (data->ds_clp != NULL || hdr->dreq != NULL)
4155 /* Otherwise, request attributes if and only if we don't hold
4158 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
4161 static void nfs4_proc_write_setup(struct nfs_pgio_data *data, struct rpc_message *msg)
4163 struct nfs_server *server = NFS_SERVER(data->header->inode);
4165 if (!nfs4_write_need_cache_consistency_data(data)) {
4166 data->args.bitmask = NULL;
4167 data->res.fattr = NULL;
4169 data->args.bitmask = server->cache_consistency_bitmask;
4171 if (!data->pgio_done_cb)
4172 data->pgio_done_cb = nfs4_write_done_cb;
4173 data->res.server = server;
4174 data->timestamp = jiffies;
4176 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
4177 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4180 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
4182 nfs4_setup_sequence(NFS_SERVER(data->inode),
4183 &data->args.seq_args,
4188 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
4190 struct inode *inode = data->inode;
4192 trace_nfs4_commit(data, task->tk_status);
4193 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
4194 rpc_restart_call_prepare(task);
4200 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
4202 if (!nfs4_sequence_done(task, &data->res.seq_res))
4204 return data->commit_done_cb(task, data);
4207 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
4209 struct nfs_server *server = NFS_SERVER(data->inode);
4211 if (data->commit_done_cb == NULL)
4212 data->commit_done_cb = nfs4_commit_done_cb;
4213 data->res.server = server;
4214 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
4215 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4218 struct nfs4_renewdata {
4219 struct nfs_client *client;
4220 unsigned long timestamp;
4224 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4225 * standalone procedure for queueing an asynchronous RENEW.
4227 static void nfs4_renew_release(void *calldata)
4229 struct nfs4_renewdata *data = calldata;
4230 struct nfs_client *clp = data->client;
4232 if (atomic_read(&clp->cl_count) > 1)
4233 nfs4_schedule_state_renewal(clp);
4234 nfs_put_client(clp);
4238 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
4240 struct nfs4_renewdata *data = calldata;
4241 struct nfs_client *clp = data->client;
4242 unsigned long timestamp = data->timestamp;
4244 trace_nfs4_renew_async(clp, task->tk_status);
4245 switch (task->tk_status) {
4248 case -NFS4ERR_LEASE_MOVED:
4249 nfs4_schedule_lease_moved_recovery(clp);
4252 /* Unless we're shutting down, schedule state recovery! */
4253 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4255 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
4256 nfs4_schedule_lease_recovery(clp);
4259 nfs4_schedule_path_down_recovery(clp);
4261 do_renew_lease(clp, timestamp);
4264 static const struct rpc_call_ops nfs4_renew_ops = {
4265 .rpc_call_done = nfs4_renew_done,
4266 .rpc_release = nfs4_renew_release,
4269 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
4271 struct rpc_message msg = {
4272 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4276 struct nfs4_renewdata *data;
4278 if (renew_flags == 0)
4280 if (!atomic_inc_not_zero(&clp->cl_count))
4282 data = kmalloc(sizeof(*data), GFP_NOFS);
4286 data->timestamp = jiffies;
4287 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
4288 &nfs4_renew_ops, data);
4291 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
4293 struct rpc_message msg = {
4294 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4298 unsigned long now = jiffies;
4301 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4304 do_renew_lease(clp, now);
4308 static inline int nfs4_server_supports_acls(struct nfs_server *server)
4310 return server->caps & NFS_CAP_ACLS;
4313 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4314 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
4317 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
4319 static int buf_to_pages_noslab(const void *buf, size_t buflen,
4320 struct page **pages, unsigned int *pgbase)
4322 struct page *newpage, **spages;
4328 len = min_t(size_t, PAGE_SIZE, buflen);
4329 newpage = alloc_page(GFP_KERNEL);
4331 if (newpage == NULL)
4333 memcpy(page_address(newpage), buf, len);
4338 } while (buflen != 0);
4344 __free_page(spages[rc-1]);
4348 struct nfs4_cached_acl {
4354 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4356 struct nfs_inode *nfsi = NFS_I(inode);
4358 spin_lock(&inode->i_lock);
4359 kfree(nfsi->nfs4_acl);
4360 nfsi->nfs4_acl = acl;
4361 spin_unlock(&inode->i_lock);
4364 static void nfs4_zap_acl_attr(struct inode *inode)
4366 nfs4_set_cached_acl(inode, NULL);
4369 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4371 struct nfs_inode *nfsi = NFS_I(inode);
4372 struct nfs4_cached_acl *acl;
4375 spin_lock(&inode->i_lock);
4376 acl = nfsi->nfs4_acl;
4379 if (buf == NULL) /* user is just asking for length */
4381 if (acl->cached == 0)
4383 ret = -ERANGE; /* see getxattr(2) man page */
4384 if (acl->len > buflen)
4386 memcpy(buf, acl->data, acl->len);
4390 spin_unlock(&inode->i_lock);
4394 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
4396 struct nfs4_cached_acl *acl;
4397 size_t buflen = sizeof(*acl) + acl_len;
4399 if (buflen <= PAGE_SIZE) {
4400 acl = kmalloc(buflen, GFP_KERNEL);
4404 _copy_from_pages(acl->data, pages, pgbase, acl_len);
4406 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4413 nfs4_set_cached_acl(inode, acl);
4417 * The getxattr API returns the required buffer length when called with a
4418 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4419 * the required buf. On a NULL buf, we send a page of data to the server
4420 * guessing that the ACL request can be serviced by a page. If so, we cache
4421 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4422 * the cache. If not so, we throw away the page, and cache the required
4423 * length. The next getxattr call will then produce another round trip to
4424 * the server, this time with the input buf of the required size.
4426 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4428 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
4429 struct nfs_getaclargs args = {
4430 .fh = NFS_FH(inode),
4434 struct nfs_getaclres res = {
4437 struct rpc_message msg = {
4438 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4442 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4443 int ret = -ENOMEM, i;
4445 /* As long as we're doing a round trip to the server anyway,
4446 * let's be prepared for a page of acl data. */
4449 if (npages > ARRAY_SIZE(pages))
4452 for (i = 0; i < npages; i++) {
4453 pages[i] = alloc_page(GFP_KERNEL);
4458 /* for decoding across pages */
4459 res.acl_scratch = alloc_page(GFP_KERNEL);
4460 if (!res.acl_scratch)
4463 args.acl_len = npages * PAGE_SIZE;
4464 args.acl_pgbase = 0;
4466 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
4467 __func__, buf, buflen, npages, args.acl_len);
4468 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4469 &msg, &args.seq_args, &res.seq_res, 0);
4473 /* Handle the case where the passed-in buffer is too short */
4474 if (res.acl_flags & NFS4_ACL_TRUNC) {
4475 /* Did the user only issue a request for the acl length? */
4481 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
4483 if (res.acl_len > buflen) {
4487 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
4492 for (i = 0; i < npages; i++)
4494 __free_page(pages[i]);
4495 if (res.acl_scratch)
4496 __free_page(res.acl_scratch);
4500 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4502 struct nfs4_exception exception = { };
4505 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4506 trace_nfs4_get_acl(inode, ret);
4509 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4510 } while (exception.retry);
4514 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4516 struct nfs_server *server = NFS_SERVER(inode);
4519 if (!nfs4_server_supports_acls(server))
4521 ret = nfs_revalidate_inode(server, inode);
4524 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4525 nfs_zap_acl_cache(inode);
4526 ret = nfs4_read_cached_acl(inode, buf, buflen);
4528 /* -ENOENT is returned if there is no ACL or if there is an ACL
4529 * but no cached acl data, just the acl length */
4531 return nfs4_get_acl_uncached(inode, buf, buflen);
4534 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4536 struct nfs_server *server = NFS_SERVER(inode);
4537 struct page *pages[NFS4ACL_MAXPAGES];
4538 struct nfs_setaclargs arg = {
4539 .fh = NFS_FH(inode),
4543 struct nfs_setaclres res;
4544 struct rpc_message msg = {
4545 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4549 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4552 if (!nfs4_server_supports_acls(server))
4554 if (npages > ARRAY_SIZE(pages))
4556 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4559 nfs4_inode_return_delegation(inode);
4560 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4563 * Free each page after tx, so the only ref left is
4564 * held by the network stack
4567 put_page(pages[i-1]);
4570 * Acl update can result in inode attribute update.
4571 * so mark the attribute cache invalid.
4573 spin_lock(&inode->i_lock);
4574 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4575 spin_unlock(&inode->i_lock);
4576 nfs_access_zap_cache(inode);
4577 nfs_zap_acl_cache(inode);
4581 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4583 struct nfs4_exception exception = { };
4586 err = __nfs4_proc_set_acl(inode, buf, buflen);
4587 trace_nfs4_set_acl(inode, err);
4588 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4590 } while (exception.retry);
4594 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
4595 static int _nfs4_get_security_label(struct inode *inode, void *buf,
4598 struct nfs_server *server = NFS_SERVER(inode);
4599 struct nfs_fattr fattr;
4600 struct nfs4_label label = {0, 0, buflen, buf};
4602 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4603 struct nfs4_getattr_arg arg = {
4604 .fh = NFS_FH(inode),
4607 struct nfs4_getattr_res res = {
4612 struct rpc_message msg = {
4613 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4619 nfs_fattr_init(&fattr);
4621 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
4624 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4626 if (buflen < label.len)
4631 static int nfs4_get_security_label(struct inode *inode, void *buf,
4634 struct nfs4_exception exception = { };
4637 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4641 err = _nfs4_get_security_label(inode, buf, buflen);
4642 trace_nfs4_get_security_label(inode, err);
4643 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4645 } while (exception.retry);
4649 static int _nfs4_do_set_security_label(struct inode *inode,
4650 struct nfs4_label *ilabel,
4651 struct nfs_fattr *fattr,
4652 struct nfs4_label *olabel)
4655 struct iattr sattr = {0};
4656 struct nfs_server *server = NFS_SERVER(inode);
4657 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4658 struct nfs_setattrargs arg = {
4659 .fh = NFS_FH(inode),
4665 struct nfs_setattrres res = {
4670 struct rpc_message msg = {
4671 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
4677 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
4679 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4681 dprintk("%s failed: %d\n", __func__, status);
4686 static int nfs4_do_set_security_label(struct inode *inode,
4687 struct nfs4_label *ilabel,
4688 struct nfs_fattr *fattr,
4689 struct nfs4_label *olabel)
4691 struct nfs4_exception exception = { };
4695 err = _nfs4_do_set_security_label(inode, ilabel,
4697 trace_nfs4_set_security_label(inode, err);
4698 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4700 } while (exception.retry);
4705 nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4707 struct nfs4_label ilabel, *olabel = NULL;
4708 struct nfs_fattr fattr;
4709 struct rpc_cred *cred;
4710 struct inode *inode = dentry->d_inode;
4713 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4716 nfs_fattr_init(&fattr);
4720 ilabel.label = (char *)buf;
4721 ilabel.len = buflen;
4723 cred = rpc_lookup_cred();
4725 return PTR_ERR(cred);
4727 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4728 if (IS_ERR(olabel)) {
4729 status = -PTR_ERR(olabel);
4733 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4735 nfs_setsecurity(inode, &fattr, olabel);
4737 nfs4_label_free(olabel);
4742 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4746 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
4748 struct nfs_client *clp = server->nfs_client;
4750 if (task->tk_status >= 0)
4752 switch(task->tk_status) {
4753 case -NFS4ERR_DELEG_REVOKED:
4754 case -NFS4ERR_ADMIN_REVOKED:
4755 case -NFS4ERR_BAD_STATEID:
4758 nfs_remove_bad_delegation(state->inode);
4759 case -NFS4ERR_OPENMODE:
4762 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4763 goto recovery_failed;
4764 goto wait_on_recovery;
4765 case -NFS4ERR_EXPIRED:
4766 if (state != NULL) {
4767 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4768 goto recovery_failed;
4770 case -NFS4ERR_STALE_STATEID:
4771 case -NFS4ERR_STALE_CLIENTID:
4772 nfs4_schedule_lease_recovery(clp);
4773 goto wait_on_recovery;
4774 case -NFS4ERR_MOVED:
4775 if (nfs4_schedule_migration_recovery(server) < 0)
4776 goto recovery_failed;
4777 goto wait_on_recovery;
4778 case -NFS4ERR_LEASE_MOVED:
4779 nfs4_schedule_lease_moved_recovery(clp);
4780 goto wait_on_recovery;
4781 #if defined(CONFIG_NFS_V4_1)
4782 case -NFS4ERR_BADSESSION:
4783 case -NFS4ERR_BADSLOT:
4784 case -NFS4ERR_BAD_HIGH_SLOT:
4785 case -NFS4ERR_DEADSESSION:
4786 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4787 case -NFS4ERR_SEQ_FALSE_RETRY:
4788 case -NFS4ERR_SEQ_MISORDERED:
4789 dprintk("%s ERROR %d, Reset session\n", __func__,
4791 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4792 goto wait_on_recovery;
4793 #endif /* CONFIG_NFS_V4_1 */
4794 case -NFS4ERR_DELAY:
4795 nfs_inc_server_stats(server, NFSIOS_DELAY);
4796 case -NFS4ERR_GRACE:
4797 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4798 case -NFS4ERR_RETRY_UNCACHED_REP:
4799 case -NFS4ERR_OLD_STATEID:
4802 task->tk_status = nfs4_map_errors(task->tk_status);
4805 task->tk_status = -EIO;
4808 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
4809 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4810 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4811 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4812 goto recovery_failed;
4814 task->tk_status = 0;
4818 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4819 nfs4_verifier *bootverf)
4823 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4824 /* An impossible timestamp guarantees this value
4825 * will never match a generated boot time. */
4827 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
4829 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4830 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4831 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
4833 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4837 nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4838 char *buf, size_t len)
4840 unsigned int result;
4843 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4845 rpc_peeraddr2str(clp->cl_rpcclient,
4847 rpc_peeraddr2str(clp->cl_rpcclient,
4848 RPC_DISPLAY_PROTO));
4854 nfs4_init_uniform_client_string(const struct nfs_client *clp,
4855 char *buf, size_t len)
4857 const char *nodename = clp->cl_rpcclient->cl_nodename;
4859 if (nfs4_client_id_uniquifier[0] != '\0')
4860 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4861 clp->rpc_ops->version,
4862 clp->cl_minorversion,
4863 nfs4_client_id_uniquifier,
4865 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4866 clp->rpc_ops->version, clp->cl_minorversion,
4871 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
4872 * services. Advertise one based on the address family of the
4876 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
4878 if (strchr(clp->cl_ipaddr, ':') != NULL)
4879 return scnprintf(buf, len, "tcp6");
4881 return scnprintf(buf, len, "tcp");
4885 * nfs4_proc_setclientid - Negotiate client ID
4886 * @clp: state data structure
4887 * @program: RPC program for NFSv4 callback service
4888 * @port: IP port number for NFS4 callback service
4889 * @cred: RPC credential to use for this call
4890 * @res: where to place the result
4892 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4894 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4895 unsigned short port, struct rpc_cred *cred,
4896 struct nfs4_setclientid_res *res)
4898 nfs4_verifier sc_verifier;
4899 struct nfs4_setclientid setclientid = {
4900 .sc_verifier = &sc_verifier,
4902 .sc_cb_ident = clp->cl_cb_ident,
4904 struct rpc_message msg = {
4905 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4906 .rpc_argp = &setclientid,
4912 /* nfs_client_id4 */
4913 nfs4_init_boot_verifier(clp, &sc_verifier);
4914 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4915 setclientid.sc_name_len =
4916 nfs4_init_uniform_client_string(clp,
4917 setclientid.sc_name,
4918 sizeof(setclientid.sc_name));
4920 setclientid.sc_name_len =
4921 nfs4_init_nonuniform_client_string(clp,
4922 setclientid.sc_name,
4923 sizeof(setclientid.sc_name));
4925 setclientid.sc_netid_len =
4926 nfs4_init_callback_netid(clp,
4927 setclientid.sc_netid,
4928 sizeof(setclientid.sc_netid));
4929 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
4930 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
4931 clp->cl_ipaddr, port >> 8, port & 255);
4933 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4934 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4935 setclientid.sc_name_len, setclientid.sc_name);
4936 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4937 trace_nfs4_setclientid(clp, status);
4938 dprintk("NFS reply setclientid: %d\n", status);
4943 * nfs4_proc_setclientid_confirm - Confirm client ID
4944 * @clp: state data structure
4945 * @res: result of a previous SETCLIENTID
4946 * @cred: RPC credential to use for this call
4948 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4950 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
4951 struct nfs4_setclientid_res *arg,
4952 struct rpc_cred *cred)
4954 struct rpc_message msg = {
4955 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
4961 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4962 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4964 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4965 trace_nfs4_setclientid_confirm(clp, status);
4966 dprintk("NFS reply setclientid_confirm: %d\n", status);
4970 struct nfs4_delegreturndata {
4971 struct nfs4_delegreturnargs args;
4972 struct nfs4_delegreturnres res;
4974 nfs4_stateid stateid;
4975 unsigned long timestamp;
4976 struct nfs_fattr fattr;
4980 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4982 struct nfs4_delegreturndata *data = calldata;
4984 if (!nfs4_sequence_done(task, &data->res.seq_res))
4987 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
4988 switch (task->tk_status) {
4990 renew_lease(data->res.server, data->timestamp);
4992 case -NFS4ERR_ADMIN_REVOKED:
4993 case -NFS4ERR_DELEG_REVOKED:
4994 case -NFS4ERR_BAD_STATEID:
4995 case -NFS4ERR_OLD_STATEID:
4996 case -NFS4ERR_STALE_STATEID:
4997 case -NFS4ERR_EXPIRED:
4998 task->tk_status = 0;
5001 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
5003 rpc_restart_call_prepare(task);
5007 data->rpc_status = task->tk_status;
5010 static void nfs4_delegreturn_release(void *calldata)
5015 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5017 struct nfs4_delegreturndata *d_data;
5019 d_data = (struct nfs4_delegreturndata *)data;
5021 nfs4_setup_sequence(d_data->res.server,
5022 &d_data->args.seq_args,
5023 &d_data->res.seq_res,
5027 static const struct rpc_call_ops nfs4_delegreturn_ops = {
5028 .rpc_call_prepare = nfs4_delegreturn_prepare,
5029 .rpc_call_done = nfs4_delegreturn_done,
5030 .rpc_release = nfs4_delegreturn_release,
5033 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5035 struct nfs4_delegreturndata *data;
5036 struct nfs_server *server = NFS_SERVER(inode);
5037 struct rpc_task *task;
5038 struct rpc_message msg = {
5039 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5042 struct rpc_task_setup task_setup_data = {
5043 .rpc_client = server->client,
5044 .rpc_message = &msg,
5045 .callback_ops = &nfs4_delegreturn_ops,
5046 .flags = RPC_TASK_ASYNC,
5050 data = kzalloc(sizeof(*data), GFP_NOFS);
5053 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
5054 data->args.fhandle = &data->fh;
5055 data->args.stateid = &data->stateid;
5056 data->args.bitmask = server->cache_consistency_bitmask;
5057 nfs_copy_fh(&data->fh, NFS_FH(inode));
5058 nfs4_stateid_copy(&data->stateid, stateid);
5059 data->res.fattr = &data->fattr;
5060 data->res.server = server;
5061 nfs_fattr_init(data->res.fattr);
5062 data->timestamp = jiffies;
5063 data->rpc_status = 0;
5065 task_setup_data.callback_data = data;
5066 msg.rpc_argp = &data->args;
5067 msg.rpc_resp = &data->res;
5068 task = rpc_run_task(&task_setup_data);
5070 return PTR_ERR(task);
5073 status = nfs4_wait_for_completion_rpc_task(task);
5076 status = data->rpc_status;
5078 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5080 nfs_refresh_inode(inode, &data->fattr);
5086 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5088 struct nfs_server *server = NFS_SERVER(inode);
5089 struct nfs4_exception exception = { };
5092 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
5093 trace_nfs4_delegreturn(inode, err);
5095 case -NFS4ERR_STALE_STATEID:
5096 case -NFS4ERR_EXPIRED:
5100 err = nfs4_handle_exception(server, err, &exception);
5101 } while (exception.retry);
5105 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5106 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5109 * sleep, with exponential backoff, and retry the LOCK operation.
5111 static unsigned long
5112 nfs4_set_lock_task_retry(unsigned long timeout)
5114 freezable_schedule_timeout_killable_unsafe(timeout);
5116 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5117 return NFS4_LOCK_MAXTIMEOUT;
5121 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5123 struct inode *inode = state->inode;
5124 struct nfs_server *server = NFS_SERVER(inode);
5125 struct nfs_client *clp = server->nfs_client;
5126 struct nfs_lockt_args arg = {
5127 .fh = NFS_FH(inode),
5130 struct nfs_lockt_res res = {
5133 struct rpc_message msg = {
5134 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5137 .rpc_cred = state->owner->so_cred,
5139 struct nfs4_lock_state *lsp;
5142 arg.lock_owner.clientid = clp->cl_clientid;
5143 status = nfs4_set_lock_state(state, request);
5146 lsp = request->fl_u.nfs4_fl.owner;
5147 arg.lock_owner.id = lsp->ls_seqid.owner_id;
5148 arg.lock_owner.s_dev = server->s_dev;
5149 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5152 request->fl_type = F_UNLCK;
5154 case -NFS4ERR_DENIED:
5157 request->fl_ops->fl_release_private(request);
5158 request->fl_ops = NULL;
5163 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5165 struct nfs4_exception exception = { };
5169 err = _nfs4_proc_getlk(state, cmd, request);
5170 trace_nfs4_get_lock(request, state, cmd, err);
5171 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
5173 } while (exception.retry);
5177 static int do_vfs_lock(struct file *file, struct file_lock *fl)
5180 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5182 res = posix_lock_file_wait(file, fl);
5185 res = flock_lock_file_wait(file, fl);
5193 struct nfs4_unlockdata {
5194 struct nfs_locku_args arg;
5195 struct nfs_locku_res res;
5196 struct nfs4_lock_state *lsp;
5197 struct nfs_open_context *ctx;
5198 struct file_lock fl;
5199 const struct nfs_server *server;
5200 unsigned long timestamp;
5203 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5204 struct nfs_open_context *ctx,
5205 struct nfs4_lock_state *lsp,
5206 struct nfs_seqid *seqid)
5208 struct nfs4_unlockdata *p;
5209 struct inode *inode = lsp->ls_state->inode;
5211 p = kzalloc(sizeof(*p), GFP_NOFS);
5214 p->arg.fh = NFS_FH(inode);
5216 p->arg.seqid = seqid;
5217 p->res.seqid = seqid;
5218 p->arg.stateid = &lsp->ls_stateid;
5220 atomic_inc(&lsp->ls_count);
5221 /* Ensure we don't close file until we're done freeing locks! */
5222 p->ctx = get_nfs_open_context(ctx);
5223 memcpy(&p->fl, fl, sizeof(p->fl));
5224 p->server = NFS_SERVER(inode);
5228 static void nfs4_locku_release_calldata(void *data)
5230 struct nfs4_unlockdata *calldata = data;
5231 nfs_free_seqid(calldata->arg.seqid);
5232 nfs4_put_lock_state(calldata->lsp);
5233 put_nfs_open_context(calldata->ctx);
5237 static void nfs4_locku_done(struct rpc_task *task, void *data)
5239 struct nfs4_unlockdata *calldata = data;
5241 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5243 switch (task->tk_status) {
5245 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5246 &calldata->res.stateid);
5247 renew_lease(calldata->server, calldata->timestamp);
5249 case -NFS4ERR_BAD_STATEID:
5250 case -NFS4ERR_OLD_STATEID:
5251 case -NFS4ERR_STALE_STATEID:
5252 case -NFS4ERR_EXPIRED:
5255 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
5256 rpc_restart_call_prepare(task);
5258 nfs_release_seqid(calldata->arg.seqid);
5261 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
5263 struct nfs4_unlockdata *calldata = data;
5265 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
5267 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
5268 /* Note: exit _without_ running nfs4_locku_done */
5271 calldata->timestamp = jiffies;
5272 if (nfs4_setup_sequence(calldata->server,
5273 &calldata->arg.seq_args,
5274 &calldata->res.seq_res,
5276 nfs_release_seqid(calldata->arg.seqid);
5279 task->tk_action = NULL;
5281 nfs4_sequence_done(task, &calldata->res.seq_res);
5284 static const struct rpc_call_ops nfs4_locku_ops = {
5285 .rpc_call_prepare = nfs4_locku_prepare,
5286 .rpc_call_done = nfs4_locku_done,
5287 .rpc_release = nfs4_locku_release_calldata,
5290 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5291 struct nfs_open_context *ctx,
5292 struct nfs4_lock_state *lsp,
5293 struct nfs_seqid *seqid)
5295 struct nfs4_unlockdata *data;
5296 struct rpc_message msg = {
5297 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5298 .rpc_cred = ctx->cred,
5300 struct rpc_task_setup task_setup_data = {
5301 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5302 .rpc_message = &msg,
5303 .callback_ops = &nfs4_locku_ops,
5304 .workqueue = nfsiod_workqueue,
5305 .flags = RPC_TASK_ASYNC,
5308 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5309 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5311 /* Ensure this is an unlock - when canceling a lock, the
5312 * canceled lock is passed in, and it won't be an unlock.
5314 fl->fl_type = F_UNLCK;
5316 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5318 nfs_free_seqid(seqid);
5319 return ERR_PTR(-ENOMEM);
5322 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5323 msg.rpc_argp = &data->arg;
5324 msg.rpc_resp = &data->res;
5325 task_setup_data.callback_data = data;
5326 return rpc_run_task(&task_setup_data);
5329 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5331 struct inode *inode = state->inode;
5332 struct nfs4_state_owner *sp = state->owner;
5333 struct nfs_inode *nfsi = NFS_I(inode);
5334 struct nfs_seqid *seqid;
5335 struct nfs4_lock_state *lsp;
5336 struct rpc_task *task;
5338 unsigned char fl_flags = request->fl_flags;
5340 status = nfs4_set_lock_state(state, request);
5341 /* Unlock _before_ we do the RPC call */
5342 request->fl_flags |= FL_EXISTS;
5343 /* Exclude nfs_delegation_claim_locks() */
5344 mutex_lock(&sp->so_delegreturn_mutex);
5345 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
5346 down_read(&nfsi->rwsem);
5347 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5348 up_read(&nfsi->rwsem);
5349 mutex_unlock(&sp->so_delegreturn_mutex);
5352 up_read(&nfsi->rwsem);
5353 mutex_unlock(&sp->so_delegreturn_mutex);
5356 /* Is this a delegated lock? */
5357 lsp = request->fl_u.nfs4_fl.owner;
5358 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5360 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
5364 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
5365 status = PTR_ERR(task);
5368 status = nfs4_wait_for_completion_rpc_task(task);
5371 request->fl_flags = fl_flags;
5372 trace_nfs4_unlock(request, state, F_SETLK, status);
5376 struct nfs4_lockdata {
5377 struct nfs_lock_args arg;
5378 struct nfs_lock_res res;
5379 struct nfs4_lock_state *lsp;
5380 struct nfs_open_context *ctx;
5381 struct file_lock fl;
5382 unsigned long timestamp;
5385 struct nfs_server *server;
5388 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
5389 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5392 struct nfs4_lockdata *p;
5393 struct inode *inode = lsp->ls_state->inode;
5394 struct nfs_server *server = NFS_SERVER(inode);
5396 p = kzalloc(sizeof(*p), gfp_mask);
5400 p->arg.fh = NFS_FH(inode);
5402 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
5403 if (p->arg.open_seqid == NULL)
5405 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
5406 if (p->arg.lock_seqid == NULL)
5407 goto out_free_seqid;
5408 p->arg.lock_stateid = &lsp->ls_stateid;
5409 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
5410 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
5411 p->arg.lock_owner.s_dev = server->s_dev;
5412 p->res.lock_seqid = p->arg.lock_seqid;
5415 atomic_inc(&lsp->ls_count);
5416 p->ctx = get_nfs_open_context(ctx);
5417 memcpy(&p->fl, fl, sizeof(p->fl));
5420 nfs_free_seqid(p->arg.open_seqid);
5426 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5428 struct nfs4_lockdata *data = calldata;
5429 struct nfs4_state *state = data->lsp->ls_state;
5431 dprintk("%s: begin!\n", __func__);
5432 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
5434 /* Do we need to do an open_to_lock_owner? */
5435 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
5436 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
5437 goto out_release_lock_seqid;
5439 data->arg.open_stateid = &state->open_stateid;
5440 data->arg.new_lock_owner = 1;
5441 data->res.open_seqid = data->arg.open_seqid;
5443 data->arg.new_lock_owner = 0;
5444 if (!nfs4_valid_open_stateid(state)) {
5445 data->rpc_status = -EBADF;
5446 task->tk_action = NULL;
5447 goto out_release_open_seqid;
5449 data->timestamp = jiffies;
5450 if (nfs4_setup_sequence(data->server,
5451 &data->arg.seq_args,
5455 out_release_open_seqid:
5456 nfs_release_seqid(data->arg.open_seqid);
5457 out_release_lock_seqid:
5458 nfs_release_seqid(data->arg.lock_seqid);
5460 nfs4_sequence_done(task, &data->res.seq_res);
5461 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
5464 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5466 struct nfs4_lockdata *data = calldata;
5468 dprintk("%s: begin!\n", __func__);
5470 if (!nfs4_sequence_done(task, &data->res.seq_res))
5473 data->rpc_status = task->tk_status;
5474 if (data->arg.new_lock_owner != 0) {
5475 if (data->rpc_status == 0)
5476 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5480 if (data->rpc_status == 0) {
5481 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
5482 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
5483 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
5486 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
5489 static void nfs4_lock_release(void *calldata)
5491 struct nfs4_lockdata *data = calldata;
5493 dprintk("%s: begin!\n", __func__);
5494 nfs_free_seqid(data->arg.open_seqid);
5495 if (data->cancelled != 0) {
5496 struct rpc_task *task;
5497 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5498 data->arg.lock_seqid);
5500 rpc_put_task_async(task);
5501 dprintk("%s: cancelling lock!\n", __func__);
5503 nfs_free_seqid(data->arg.lock_seqid);
5504 nfs4_put_lock_state(data->lsp);
5505 put_nfs_open_context(data->ctx);
5507 dprintk("%s: done!\n", __func__);
5510 static const struct rpc_call_ops nfs4_lock_ops = {
5511 .rpc_call_prepare = nfs4_lock_prepare,
5512 .rpc_call_done = nfs4_lock_done,
5513 .rpc_release = nfs4_lock_release,
5516 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5519 case -NFS4ERR_ADMIN_REVOKED:
5520 case -NFS4ERR_BAD_STATEID:
5521 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
5522 if (new_lock_owner != 0 ||
5523 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
5524 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
5526 case -NFS4ERR_STALE_STATEID:
5527 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
5528 case -NFS4ERR_EXPIRED:
5529 nfs4_schedule_lease_recovery(server->nfs_client);
5533 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
5535 struct nfs4_lockdata *data;
5536 struct rpc_task *task;
5537 struct rpc_message msg = {
5538 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5539 .rpc_cred = state->owner->so_cred,
5541 struct rpc_task_setup task_setup_data = {
5542 .rpc_client = NFS_CLIENT(state->inode),
5543 .rpc_message = &msg,
5544 .callback_ops = &nfs4_lock_ops,
5545 .workqueue = nfsiod_workqueue,
5546 .flags = RPC_TASK_ASYNC,
5550 dprintk("%s: begin!\n", __func__);
5551 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
5552 fl->fl_u.nfs4_fl.owner,
5553 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
5557 data->arg.block = 1;
5558 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5559 msg.rpc_argp = &data->arg;
5560 msg.rpc_resp = &data->res;
5561 task_setup_data.callback_data = data;
5562 if (recovery_type > NFS_LOCK_NEW) {
5563 if (recovery_type == NFS_LOCK_RECLAIM)
5564 data->arg.reclaim = NFS_LOCK_RECLAIM;
5565 nfs4_set_sequence_privileged(&data->arg.seq_args);
5567 task = rpc_run_task(&task_setup_data);
5569 return PTR_ERR(task);
5570 ret = nfs4_wait_for_completion_rpc_task(task);
5572 ret = data->rpc_status;
5574 nfs4_handle_setlk_error(data->server, data->lsp,
5575 data->arg.new_lock_owner, ret);
5577 data->cancelled = 1;
5579 dprintk("%s: done, ret = %d!\n", __func__, ret);
5583 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5585 struct nfs_server *server = NFS_SERVER(state->inode);
5586 struct nfs4_exception exception = {
5587 .inode = state->inode,
5592 /* Cache the lock if possible... */
5593 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5595 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
5596 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
5597 if (err != -NFS4ERR_DELAY)
5599 nfs4_handle_exception(server, err, &exception);
5600 } while (exception.retry);
5604 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5606 struct nfs_server *server = NFS_SERVER(state->inode);
5607 struct nfs4_exception exception = {
5608 .inode = state->inode,
5612 err = nfs4_set_lock_state(state, request);
5615 if (!recover_lost_locks) {
5616 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5620 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5622 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
5623 trace_nfs4_lock_expired(request, state, F_SETLK, err);
5627 case -NFS4ERR_GRACE:
5628 case -NFS4ERR_DELAY:
5629 nfs4_handle_exception(server, err, &exception);
5632 } while (exception.retry);
5637 #if defined(CONFIG_NFS_V4_1)
5639 * nfs41_check_expired_locks - possibly free a lock stateid
5641 * @state: NFSv4 state for an inode
5643 * Returns NFS_OK if recovery for this stateid is now finished.
5644 * Otherwise a negative NFS4ERR value is returned.
5646 static int nfs41_check_expired_locks(struct nfs4_state *state)
5648 int status, ret = -NFS4ERR_BAD_STATEID;
5649 struct nfs4_lock_state *lsp;
5650 struct nfs_server *server = NFS_SERVER(state->inode);
5652 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
5653 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
5654 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5656 status = nfs41_test_stateid(server,
5659 trace_nfs4_test_lock_stateid(state, lsp, status);
5660 if (status != NFS_OK) {
5661 /* Free the stateid unless the server
5662 * informs us the stateid is unrecognized. */
5663 if (status != -NFS4ERR_BAD_STATEID)
5664 nfs41_free_stateid(server,
5667 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5676 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5678 int status = NFS_OK;
5680 if (test_bit(LK_STATE_IN_USE, &state->flags))
5681 status = nfs41_check_expired_locks(state);
5682 if (status != NFS_OK)
5683 status = nfs4_lock_expired(state, request);
5688 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5690 struct nfs4_state_owner *sp = state->owner;
5691 struct nfs_inode *nfsi = NFS_I(state->inode);
5692 unsigned char fl_flags = request->fl_flags;
5694 int status = -ENOLCK;
5696 if ((fl_flags & FL_POSIX) &&
5697 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5699 /* Is this a delegated open? */
5700 status = nfs4_set_lock_state(state, request);
5703 request->fl_flags |= FL_ACCESS;
5704 status = do_vfs_lock(request->fl_file, request);
5707 down_read(&nfsi->rwsem);
5708 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
5709 /* Yes: cache locks! */
5710 /* ...but avoid races with delegation recall... */
5711 request->fl_flags = fl_flags & ~FL_SLEEP;
5712 status = do_vfs_lock(request->fl_file, request);
5715 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5716 up_read(&nfsi->rwsem);
5717 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
5720 down_read(&nfsi->rwsem);
5721 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5722 status = -NFS4ERR_DELAY;
5725 /* Note: we always want to sleep here! */
5726 request->fl_flags = fl_flags | FL_SLEEP;
5727 if (do_vfs_lock(request->fl_file, request) < 0)
5728 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5729 "manager!\n", __func__);
5731 up_read(&nfsi->rwsem);
5733 request->fl_flags = fl_flags;
5737 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5739 struct nfs4_exception exception = {
5741 .inode = state->inode,
5746 err = _nfs4_proc_setlk(state, cmd, request);
5747 trace_nfs4_set_lock(request, state, cmd, err);
5748 if (err == -NFS4ERR_DENIED)
5750 err = nfs4_handle_exception(NFS_SERVER(state->inode),
5752 } while (exception.retry);
5757 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5759 struct nfs_open_context *ctx;
5760 struct nfs4_state *state;
5761 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5764 /* verify open state */
5765 ctx = nfs_file_open_context(filp);
5768 if (request->fl_start < 0 || request->fl_end < 0)
5771 if (IS_GETLK(cmd)) {
5773 return nfs4_proc_getlk(state, F_GETLK, request);
5777 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5780 if (request->fl_type == F_UNLCK) {
5782 return nfs4_proc_unlck(state, cmd, request);
5789 * Don't rely on the VFS having checked the file open mode,
5790 * since it won't do this for flock() locks.
5792 switch (request->fl_type) {
5794 if (!(filp->f_mode & FMODE_READ))
5798 if (!(filp->f_mode & FMODE_WRITE))
5803 status = nfs4_proc_setlk(state, cmd, request);
5804 if ((status != -EAGAIN) || IS_SETLK(cmd))
5806 timeout = nfs4_set_lock_task_retry(timeout);
5807 status = -ERESTARTSYS;
5810 } while(status < 0);
5814 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
5816 struct nfs_server *server = NFS_SERVER(state->inode);
5819 err = nfs4_set_lock_state(state, fl);
5822 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
5823 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
5826 struct nfs_release_lockowner_data {
5827 struct nfs4_lock_state *lsp;
5828 struct nfs_server *server;
5829 struct nfs_release_lockowner_args args;
5830 struct nfs_release_lockowner_res res;
5831 unsigned long timestamp;
5834 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
5836 struct nfs_release_lockowner_data *data = calldata;
5837 nfs40_setup_sequence(data->server,
5838 &data->args.seq_args, &data->res.seq_res, task);
5839 data->timestamp = jiffies;
5842 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
5844 struct nfs_release_lockowner_data *data = calldata;
5845 struct nfs_server *server = data->server;
5847 nfs40_sequence_done(task, &data->res.seq_res);
5849 switch (task->tk_status) {
5851 renew_lease(server, data->timestamp);
5853 case -NFS4ERR_STALE_CLIENTID:
5854 case -NFS4ERR_EXPIRED:
5855 case -NFS4ERR_LEASE_MOVED:
5856 case -NFS4ERR_DELAY:
5857 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN)
5858 rpc_restart_call_prepare(task);
5862 static void nfs4_release_lockowner_release(void *calldata)
5864 struct nfs_release_lockowner_data *data = calldata;
5865 nfs4_free_lock_state(data->server, data->lsp);
5869 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
5870 .rpc_call_prepare = nfs4_release_lockowner_prepare,
5871 .rpc_call_done = nfs4_release_lockowner_done,
5872 .rpc_release = nfs4_release_lockowner_release,
5875 static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
5877 struct nfs_release_lockowner_data *data;
5878 struct rpc_message msg = {
5879 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5882 if (server->nfs_client->cl_mvops->minor_version != 0)
5885 data = kmalloc(sizeof(*data), GFP_NOFS);
5889 data->server = server;
5890 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5891 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5892 data->args.lock_owner.s_dev = server->s_dev;
5894 msg.rpc_argp = &data->args;
5895 msg.rpc_resp = &data->res;
5896 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
5897 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5901 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5903 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5904 const void *buf, size_t buflen,
5905 int flags, int type)
5907 if (strcmp(key, "") != 0)
5910 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
5913 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5914 void *buf, size_t buflen, int type)
5916 if (strcmp(key, "") != 0)
5919 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
5922 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5923 size_t list_len, const char *name,
5924 size_t name_len, int type)
5926 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
5928 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5931 if (list && len <= list_len)
5932 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
5936 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
5937 static inline int nfs4_server_supports_labels(struct nfs_server *server)
5939 return server->caps & NFS_CAP_SECURITY_LABEL;
5942 static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
5943 const void *buf, size_t buflen,
5944 int flags, int type)
5946 if (security_ismaclabel(key))
5947 return nfs4_set_security_label(dentry, buf, buflen);
5952 static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
5953 void *buf, size_t buflen, int type)
5955 if (security_ismaclabel(key))
5956 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
5960 static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
5961 size_t list_len, const char *name,
5962 size_t name_len, int type)
5966 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
5967 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
5968 if (list && len <= list_len)
5969 security_inode_listsecurity(dentry->d_inode, list, len);
5974 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
5975 .prefix = XATTR_SECURITY_PREFIX,
5976 .list = nfs4_xattr_list_nfs4_label,
5977 .get = nfs4_xattr_get_nfs4_label,
5978 .set = nfs4_xattr_set_nfs4_label,
5984 * nfs_fhget will use either the mounted_on_fileid or the fileid
5986 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5988 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5989 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5990 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
5991 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
5994 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
5995 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
5996 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6000 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6001 const struct qstr *name,
6002 struct nfs4_fs_locations *fs_locations,
6005 struct nfs_server *server = NFS_SERVER(dir);
6007 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6009 struct nfs4_fs_locations_arg args = {
6010 .dir_fh = NFS_FH(dir),
6015 struct nfs4_fs_locations_res res = {
6016 .fs_locations = fs_locations,
6018 struct rpc_message msg = {
6019 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6025 dprintk("%s: start\n", __func__);
6027 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6028 * is not supported */
6029 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6030 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6032 bitmask[0] |= FATTR4_WORD0_FILEID;
6034 nfs_fattr_init(&fs_locations->fattr);
6035 fs_locations->server = server;
6036 fs_locations->nlocations = 0;
6037 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
6038 dprintk("%s: returned status = %d\n", __func__, status);
6042 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6043 const struct qstr *name,
6044 struct nfs4_fs_locations *fs_locations,
6047 struct nfs4_exception exception = { };
6050 err = _nfs4_proc_fs_locations(client, dir, name,
6051 fs_locations, page);
6052 trace_nfs4_get_fs_locations(dir, name, err);
6053 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6055 } while (exception.retry);
6060 * This operation also signals the server that this client is
6061 * performing migration recovery. The server can stop returning
6062 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6063 * appended to this compound to identify the client ID which is
6064 * performing recovery.
6066 static int _nfs40_proc_get_locations(struct inode *inode,
6067 struct nfs4_fs_locations *locations,
6068 struct page *page, struct rpc_cred *cred)
6070 struct nfs_server *server = NFS_SERVER(inode);
6071 struct rpc_clnt *clnt = server->client;
6073 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6075 struct nfs4_fs_locations_arg args = {
6076 .clientid = server->nfs_client->cl_clientid,
6077 .fh = NFS_FH(inode),
6080 .migration = 1, /* skip LOOKUP */
6081 .renew = 1, /* append RENEW */
6083 struct nfs4_fs_locations_res res = {
6084 .fs_locations = locations,
6088 struct rpc_message msg = {
6089 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6094 unsigned long now = jiffies;
6097 nfs_fattr_init(&locations->fattr);
6098 locations->server = server;
6099 locations->nlocations = 0;
6101 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6102 nfs4_set_sequence_privileged(&args.seq_args);
6103 status = nfs4_call_sync_sequence(clnt, server, &msg,
6104 &args.seq_args, &res.seq_res);
6108 renew_lease(server, now);
6112 #ifdef CONFIG_NFS_V4_1
6115 * This operation also signals the server that this client is
6116 * performing migration recovery. The server can stop asserting
6117 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6118 * performing this operation is identified in the SEQUENCE
6119 * operation in this compound.
6121 * When the client supports GETATTR(fs_locations_info), it can
6122 * be plumbed in here.
6124 static int _nfs41_proc_get_locations(struct inode *inode,
6125 struct nfs4_fs_locations *locations,
6126 struct page *page, struct rpc_cred *cred)
6128 struct nfs_server *server = NFS_SERVER(inode);
6129 struct rpc_clnt *clnt = server->client;
6131 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6133 struct nfs4_fs_locations_arg args = {
6134 .fh = NFS_FH(inode),
6137 .migration = 1, /* skip LOOKUP */
6139 struct nfs4_fs_locations_res res = {
6140 .fs_locations = locations,
6143 struct rpc_message msg = {
6144 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6151 nfs_fattr_init(&locations->fattr);
6152 locations->server = server;
6153 locations->nlocations = 0;
6155 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6156 nfs4_set_sequence_privileged(&args.seq_args);
6157 status = nfs4_call_sync_sequence(clnt, server, &msg,
6158 &args.seq_args, &res.seq_res);
6159 if (status == NFS4_OK &&
6160 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6161 status = -NFS4ERR_LEASE_MOVED;
6165 #endif /* CONFIG_NFS_V4_1 */
6168 * nfs4_proc_get_locations - discover locations for a migrated FSID
6169 * @inode: inode on FSID that is migrating
6170 * @locations: result of query
6172 * @cred: credential to use for this operation
6174 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6175 * operation failed, or a negative errno if a local error occurred.
6177 * On success, "locations" is filled in, but if the server has
6178 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6181 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6182 * from this client that require migration recovery.
6184 int nfs4_proc_get_locations(struct inode *inode,
6185 struct nfs4_fs_locations *locations,
6186 struct page *page, struct rpc_cred *cred)
6188 struct nfs_server *server = NFS_SERVER(inode);
6189 struct nfs_client *clp = server->nfs_client;
6190 const struct nfs4_mig_recovery_ops *ops =
6191 clp->cl_mvops->mig_recovery_ops;
6192 struct nfs4_exception exception = { };
6195 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6196 (unsigned long long)server->fsid.major,
6197 (unsigned long long)server->fsid.minor,
6199 nfs_display_fhandle(NFS_FH(inode), __func__);
6202 status = ops->get_locations(inode, locations, page, cred);
6203 if (status != -NFS4ERR_DELAY)
6205 nfs4_handle_exception(server, status, &exception);
6206 } while (exception.retry);
6211 * This operation also signals the server that this client is
6212 * performing "lease moved" recovery. The server can stop
6213 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6214 * is appended to this compound to identify the client ID which is
6215 * performing recovery.
6217 static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6219 struct nfs_server *server = NFS_SERVER(inode);
6220 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6221 struct rpc_clnt *clnt = server->client;
6222 struct nfs4_fsid_present_arg args = {
6223 .fh = NFS_FH(inode),
6224 .clientid = clp->cl_clientid,
6225 .renew = 1, /* append RENEW */
6227 struct nfs4_fsid_present_res res = {
6230 struct rpc_message msg = {
6231 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6236 unsigned long now = jiffies;
6239 res.fh = nfs_alloc_fhandle();
6243 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6244 nfs4_set_sequence_privileged(&args.seq_args);
6245 status = nfs4_call_sync_sequence(clnt, server, &msg,
6246 &args.seq_args, &res.seq_res);
6247 nfs_free_fhandle(res.fh);
6251 do_renew_lease(clp, now);
6255 #ifdef CONFIG_NFS_V4_1
6258 * This operation also signals the server that this client is
6259 * performing "lease moved" recovery. The server can stop asserting
6260 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6261 * this operation is identified in the SEQUENCE operation in this
6264 static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6266 struct nfs_server *server = NFS_SERVER(inode);
6267 struct rpc_clnt *clnt = server->client;
6268 struct nfs4_fsid_present_arg args = {
6269 .fh = NFS_FH(inode),
6271 struct nfs4_fsid_present_res res = {
6273 struct rpc_message msg = {
6274 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6281 res.fh = nfs_alloc_fhandle();
6285 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6286 nfs4_set_sequence_privileged(&args.seq_args);
6287 status = nfs4_call_sync_sequence(clnt, server, &msg,
6288 &args.seq_args, &res.seq_res);
6289 nfs_free_fhandle(res.fh);
6290 if (status == NFS4_OK &&
6291 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6292 status = -NFS4ERR_LEASE_MOVED;
6296 #endif /* CONFIG_NFS_V4_1 */
6299 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6300 * @inode: inode on FSID to check
6301 * @cred: credential to use for this operation
6303 * Server indicates whether the FSID is present, moved, or not
6304 * recognized. This operation is necessary to clear a LEASE_MOVED
6305 * condition for this client ID.
6307 * Returns NFS4_OK if the FSID is present on this server,
6308 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6309 * NFS4ERR code if some error occurred on the server, or a
6310 * negative errno if a local failure occurred.
6312 int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6314 struct nfs_server *server = NFS_SERVER(inode);
6315 struct nfs_client *clp = server->nfs_client;
6316 const struct nfs4_mig_recovery_ops *ops =
6317 clp->cl_mvops->mig_recovery_ops;
6318 struct nfs4_exception exception = { };
6321 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6322 (unsigned long long)server->fsid.major,
6323 (unsigned long long)server->fsid.minor,
6325 nfs_display_fhandle(NFS_FH(inode), __func__);
6328 status = ops->fsid_present(inode, cred);
6329 if (status != -NFS4ERR_DELAY)
6331 nfs4_handle_exception(server, status, &exception);
6332 } while (exception.retry);
6337 * If 'use_integrity' is true and the state managment nfs_client
6338 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6339 * and the machine credential as per RFC3530bis and RFC5661 Security
6340 * Considerations sections. Otherwise, just use the user cred with the
6341 * filesystem's rpc_client.
6343 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
6346 struct nfs4_secinfo_arg args = {
6347 .dir_fh = NFS_FH(dir),
6350 struct nfs4_secinfo_res res = {
6353 struct rpc_message msg = {
6354 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6358 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
6359 struct rpc_cred *cred = NULL;
6361 if (use_integrity) {
6362 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
6363 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6364 msg.rpc_cred = cred;
6367 dprintk("NFS call secinfo %s\n", name->name);
6369 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6370 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6372 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6374 dprintk("NFS reply secinfo: %d\n", status);
6382 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6383 struct nfs4_secinfo_flavors *flavors)
6385 struct nfs4_exception exception = { };
6388 err = -NFS4ERR_WRONGSEC;
6390 /* try to use integrity protection with machine cred */
6391 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6392 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6395 * if unable to use integrity protection, or SECINFO with
6396 * integrity protection returns NFS4ERR_WRONGSEC (which is
6397 * disallowed by spec, but exists in deployed servers) use
6398 * the current filesystem's rpc_client and the user cred.
6400 if (err == -NFS4ERR_WRONGSEC)
6401 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6403 trace_nfs4_secinfo(dir, name, err);
6404 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6406 } while (exception.retry);
6410 #ifdef CONFIG_NFS_V4_1
6412 * Check the exchange flags returned by the server for invalid flags, having
6413 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6416 static int nfs4_check_cl_exchange_flags(u32 flags)
6418 if (flags & ~EXCHGID4_FLAG_MASK_R)
6420 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6421 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6423 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6427 return -NFS4ERR_INVAL;
6431 nfs41_same_server_scope(struct nfs41_server_scope *a,
6432 struct nfs41_server_scope *b)
6434 if (a->server_scope_sz == b->server_scope_sz &&
6435 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6442 * nfs4_proc_bind_conn_to_session()
6444 * The 4.1 client currently uses the same TCP connection for the
6445 * fore and backchannel.
6447 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
6450 struct nfs41_bind_conn_to_session_res res;
6451 struct rpc_message msg = {
6453 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6459 dprintk("--> %s\n", __func__);
6461 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
6462 if (unlikely(res.session == NULL)) {
6467 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6468 trace_nfs4_bind_conn_to_session(clp, status);
6470 if (memcmp(res.session->sess_id.data,
6471 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6472 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6476 if (res.dir != NFS4_CDFS4_BOTH) {
6477 dprintk("NFS: %s: Unexpected direction from server\n",
6482 if (res.use_conn_in_rdma_mode) {
6483 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6492 dprintk("<-- %s status= %d\n", __func__, status);
6497 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6498 * and operations we'd like to see to enable certain features in the allow map
6500 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6501 .how = SP4_MACH_CRED,
6502 .enforce.u.words = {
6503 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6504 1 << (OP_EXCHANGE_ID - 32) |
6505 1 << (OP_CREATE_SESSION - 32) |
6506 1 << (OP_DESTROY_SESSION - 32) |
6507 1 << (OP_DESTROY_CLIENTID - 32)
6510 [0] = 1 << (OP_CLOSE) |
6513 [1] = 1 << (OP_SECINFO - 32) |
6514 1 << (OP_SECINFO_NO_NAME - 32) |
6515 1 << (OP_TEST_STATEID - 32) |
6516 1 << (OP_FREE_STATEID - 32) |
6517 1 << (OP_WRITE - 32)
6522 * Select the state protection mode for client `clp' given the server results
6523 * from exchange_id in `sp'.
6525 * Returns 0 on success, negative errno otherwise.
6527 static int nfs4_sp4_select_mode(struct nfs_client *clp,
6528 struct nfs41_state_protection *sp)
6530 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6531 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6532 1 << (OP_EXCHANGE_ID - 32) |
6533 1 << (OP_CREATE_SESSION - 32) |
6534 1 << (OP_DESTROY_SESSION - 32) |
6535 1 << (OP_DESTROY_CLIENTID - 32)
6539 if (sp->how == SP4_MACH_CRED) {
6540 /* Print state protect result */
6541 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6542 for (i = 0; i <= LAST_NFS4_OP; i++) {
6543 if (test_bit(i, sp->enforce.u.longs))
6544 dfprintk(MOUNT, " enforce op %d\n", i);
6545 if (test_bit(i, sp->allow.u.longs))
6546 dfprintk(MOUNT, " allow op %d\n", i);
6549 /* make sure nothing is on enforce list that isn't supported */
6550 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6551 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6552 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6558 * Minimal mode - state operations are allowed to use machine
6559 * credential. Note this already happens by default, so the
6560 * client doesn't have to do anything more than the negotiation.
6562 * NOTE: we don't care if EXCHANGE_ID is in the list -
6563 * we're already using the machine cred for exchange_id
6564 * and will never use a different cred.
6566 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6567 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6568 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6569 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6570 dfprintk(MOUNT, "sp4_mach_cred:\n");
6571 dfprintk(MOUNT, " minimal mode enabled\n");
6572 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6574 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6578 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6579 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6580 dfprintk(MOUNT, " cleanup mode enabled\n");
6581 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6584 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6585 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6586 dfprintk(MOUNT, " secinfo mode enabled\n");
6587 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6590 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6591 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6592 dfprintk(MOUNT, " stateid mode enabled\n");
6593 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6596 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6597 dfprintk(MOUNT, " write mode enabled\n");
6598 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6601 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6602 dfprintk(MOUNT, " commit mode enabled\n");
6603 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6611 * _nfs4_proc_exchange_id()
6613 * Wrapper for EXCHANGE_ID operation.
6615 static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6618 nfs4_verifier verifier;
6619 struct nfs41_exchange_id_args args = {
6620 .verifier = &verifier,
6622 #ifdef CONFIG_NFS_V4_1_MIGRATION
6623 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6624 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6625 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6627 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6628 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6631 struct nfs41_exchange_id_res res = {
6635 struct rpc_message msg = {
6636 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6642 nfs4_init_boot_verifier(clp, &verifier);
6643 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6645 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6646 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6647 args.id_len, args.id);
6649 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
6651 if (unlikely(res.server_owner == NULL)) {
6656 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
6658 if (unlikely(res.server_scope == NULL)) {
6660 goto out_server_owner;
6663 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
6664 if (unlikely(res.impl_id == NULL)) {
6666 goto out_server_scope;
6671 args.state_protect.how = SP4_NONE;
6675 args.state_protect = nfs4_sp4_mach_cred_request;
6682 goto out_server_scope;
6685 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6686 trace_nfs4_exchange_id(clp, status);
6688 status = nfs4_check_cl_exchange_flags(res.flags);
6691 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6694 clp->cl_clientid = res.clientid;
6695 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6696 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6697 clp->cl_seqid = res.seqid;
6699 kfree(clp->cl_serverowner);
6700 clp->cl_serverowner = res.server_owner;
6701 res.server_owner = NULL;
6703 /* use the most recent implementation id */
6704 kfree(clp->cl_implid);
6705 clp->cl_implid = res.impl_id;
6707 if (clp->cl_serverscope != NULL &&
6708 !nfs41_same_server_scope(clp->cl_serverscope,
6709 res.server_scope)) {
6710 dprintk("%s: server_scope mismatch detected\n",
6712 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
6713 kfree(clp->cl_serverscope);
6714 clp->cl_serverscope = NULL;
6717 if (clp->cl_serverscope == NULL) {
6718 clp->cl_serverscope = res.server_scope;
6725 kfree(res.server_owner);
6727 kfree(res.server_scope);
6729 if (clp->cl_implid != NULL)
6730 dprintk("NFS reply exchange_id: Server Implementation ID: "
6731 "domain: %s, name: %s, date: %llu,%u\n",
6732 clp->cl_implid->domain, clp->cl_implid->name,
6733 clp->cl_implid->date.seconds,
6734 clp->cl_implid->date.nseconds);
6735 dprintk("NFS reply exchange_id: %d\n", status);
6740 * nfs4_proc_exchange_id()
6742 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6744 * Since the clientid has expired, all compounds using sessions
6745 * associated with the stale clientid will be returning
6746 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6747 * be in some phase of session reset.
6749 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6751 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6753 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6756 /* try SP4_MACH_CRED if krb5i/p */
6757 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6758 authflavor == RPC_AUTH_GSS_KRB5P) {
6759 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6765 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6768 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6769 struct rpc_cred *cred)
6771 struct rpc_message msg = {
6772 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6778 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6779 trace_nfs4_destroy_clientid(clp, status);
6781 dprintk("NFS: Got error %d from the server %s on "
6782 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6786 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6787 struct rpc_cred *cred)
6792 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6793 ret = _nfs4_proc_destroy_clientid(clp, cred);
6795 case -NFS4ERR_DELAY:
6796 case -NFS4ERR_CLIENTID_BUSY:
6806 int nfs4_destroy_clientid(struct nfs_client *clp)
6808 struct rpc_cred *cred;
6811 if (clp->cl_mvops->minor_version < 1)
6813 if (clp->cl_exchange_flags == 0)
6815 if (clp->cl_preserve_clid)
6817 cred = nfs4_get_clid_cred(clp);
6818 ret = nfs4_proc_destroy_clientid(clp, cred);
6823 case -NFS4ERR_STALE_CLIENTID:
6824 clp->cl_exchange_flags = 0;
6830 struct nfs4_get_lease_time_data {
6831 struct nfs4_get_lease_time_args *args;
6832 struct nfs4_get_lease_time_res *res;
6833 struct nfs_client *clp;
6836 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6839 struct nfs4_get_lease_time_data *data =
6840 (struct nfs4_get_lease_time_data *)calldata;
6842 dprintk("--> %s\n", __func__);
6843 /* just setup sequence, do not trigger session recovery
6844 since we're invoked within one */
6845 nfs41_setup_sequence(data->clp->cl_session,
6846 &data->args->la_seq_args,
6847 &data->res->lr_seq_res,
6849 dprintk("<-- %s\n", __func__);
6853 * Called from nfs4_state_manager thread for session setup, so don't recover
6854 * from sequence operation or clientid errors.
6856 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6858 struct nfs4_get_lease_time_data *data =
6859 (struct nfs4_get_lease_time_data *)calldata;
6861 dprintk("--> %s\n", __func__);
6862 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6864 switch (task->tk_status) {
6865 case -NFS4ERR_DELAY:
6866 case -NFS4ERR_GRACE:
6867 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
6868 rpc_delay(task, NFS4_POLL_RETRY_MIN);
6869 task->tk_status = 0;
6871 case -NFS4ERR_RETRY_UNCACHED_REP:
6872 rpc_restart_call_prepare(task);
6875 dprintk("<-- %s\n", __func__);
6878 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
6879 .rpc_call_prepare = nfs4_get_lease_time_prepare,
6880 .rpc_call_done = nfs4_get_lease_time_done,
6883 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
6885 struct rpc_task *task;
6886 struct nfs4_get_lease_time_args args;
6887 struct nfs4_get_lease_time_res res = {
6888 .lr_fsinfo = fsinfo,
6890 struct nfs4_get_lease_time_data data = {
6895 struct rpc_message msg = {
6896 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
6900 struct rpc_task_setup task_setup = {
6901 .rpc_client = clp->cl_rpcclient,
6902 .rpc_message = &msg,
6903 .callback_ops = &nfs4_get_lease_time_ops,
6904 .callback_data = &data,
6905 .flags = RPC_TASK_TIMEOUT,
6909 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
6910 nfs4_set_sequence_privileged(&args.la_seq_args);
6911 dprintk("--> %s\n", __func__);
6912 task = rpc_run_task(&task_setup);
6915 status = PTR_ERR(task);
6917 status = task->tk_status;
6920 dprintk("<-- %s return %d\n", __func__, status);
6926 * Initialize the values to be used by the client in CREATE_SESSION
6927 * If nfs4_init_session set the fore channel request and response sizes,
6930 * Set the back channel max_resp_sz_cached to zero to force the client to
6931 * always set csa_cachethis to FALSE because the current implementation
6932 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
6934 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
6936 unsigned int max_rqst_sz, max_resp_sz;
6938 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
6939 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
6941 /* Fore channel attributes */
6942 args->fc_attrs.max_rqst_sz = max_rqst_sz;
6943 args->fc_attrs.max_resp_sz = max_resp_sz;
6944 args->fc_attrs.max_ops = NFS4_MAX_OPS;
6945 args->fc_attrs.max_reqs = max_session_slots;
6947 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
6948 "max_ops=%u max_reqs=%u\n",
6950 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
6951 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
6953 /* Back channel attributes */
6954 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
6955 args->bc_attrs.max_resp_sz = PAGE_SIZE;
6956 args->bc_attrs.max_resp_sz_cached = 0;
6957 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
6958 args->bc_attrs.max_reqs = 1;
6960 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
6961 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
6963 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
6964 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
6965 args->bc_attrs.max_reqs);
6968 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
6970 struct nfs4_channel_attrs *sent = &args->fc_attrs;
6971 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
6973 if (rcvd->max_resp_sz > sent->max_resp_sz)
6976 * Our requested max_ops is the minimum we need; we're not
6977 * prepared to break up compounds into smaller pieces than that.
6978 * So, no point even trying to continue if the server won't
6981 if (rcvd->max_ops < sent->max_ops)
6983 if (rcvd->max_reqs == 0)
6985 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
6986 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
6990 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
6992 struct nfs4_channel_attrs *sent = &args->bc_attrs;
6993 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
6995 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
6997 if (rcvd->max_resp_sz < sent->max_resp_sz)
6999 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7001 /* These would render the backchannel useless: */
7002 if (rcvd->max_ops != sent->max_ops)
7004 if (rcvd->max_reqs != sent->max_reqs)
7009 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7010 struct nfs4_session *session)
7014 ret = nfs4_verify_fore_channel_attrs(args, session);
7017 return nfs4_verify_back_channel_attrs(args, session);
7020 static int _nfs4_proc_create_session(struct nfs_client *clp,
7021 struct rpc_cred *cred)
7023 struct nfs4_session *session = clp->cl_session;
7024 struct nfs41_create_session_args args = {
7026 .cb_program = NFS4_CALLBACK,
7028 struct nfs41_create_session_res res = {
7031 struct rpc_message msg = {
7032 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7039 nfs4_init_channel_attrs(&args);
7040 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
7042 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7043 trace_nfs4_create_session(clp, status);
7046 /* Verify the session's negotiated channel_attrs values */
7047 status = nfs4_verify_channel_attrs(&args, session);
7048 /* Increment the clientid slot sequence id */
7056 * Issues a CREATE_SESSION operation to the server.
7057 * It is the responsibility of the caller to verify the session is
7058 * expired before calling this routine.
7060 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
7064 struct nfs4_session *session = clp->cl_session;
7066 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7068 status = _nfs4_proc_create_session(clp, cred);
7072 /* Init or reset the session slot tables */
7073 status = nfs4_setup_session_slot_tables(session);
7074 dprintk("slot table setup returned %d\n", status);
7078 ptr = (unsigned *)&session->sess_id.data[0];
7079 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7080 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
7082 dprintk("<-- %s\n", __func__);
7087 * Issue the over-the-wire RPC DESTROY_SESSION.
7088 * The caller must serialize access to this routine.
7090 int nfs4_proc_destroy_session(struct nfs4_session *session,
7091 struct rpc_cred *cred)
7093 struct rpc_message msg = {
7094 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7095 .rpc_argp = session,
7100 dprintk("--> nfs4_proc_destroy_session\n");
7102 /* session is still being setup */
7103 if (session->clp->cl_cons_state != NFS_CS_READY)
7106 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7107 trace_nfs4_destroy_session(session->clp, status);
7110 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
7111 "Session has been destroyed regardless...\n", status);
7113 dprintk("<-- nfs4_proc_destroy_session\n");
7118 * Renew the cl_session lease.
7120 struct nfs4_sequence_data {
7121 struct nfs_client *clp;
7122 struct nfs4_sequence_args args;
7123 struct nfs4_sequence_res res;
7126 static void nfs41_sequence_release(void *data)
7128 struct nfs4_sequence_data *calldata = data;
7129 struct nfs_client *clp = calldata->clp;
7131 if (atomic_read(&clp->cl_count) > 1)
7132 nfs4_schedule_state_renewal(clp);
7133 nfs_put_client(clp);
7137 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7139 switch(task->tk_status) {
7140 case -NFS4ERR_DELAY:
7141 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7144 nfs4_schedule_lease_recovery(clp);
7149 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
7151 struct nfs4_sequence_data *calldata = data;
7152 struct nfs_client *clp = calldata->clp;
7154 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7157 trace_nfs4_sequence(clp, task->tk_status);
7158 if (task->tk_status < 0) {
7159 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7160 if (atomic_read(&clp->cl_count) == 1)
7163 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7164 rpc_restart_call_prepare(task);
7168 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7170 dprintk("<-- %s\n", __func__);
7173 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7175 struct nfs4_sequence_data *calldata = data;
7176 struct nfs_client *clp = calldata->clp;
7177 struct nfs4_sequence_args *args;
7178 struct nfs4_sequence_res *res;
7180 args = task->tk_msg.rpc_argp;
7181 res = task->tk_msg.rpc_resp;
7183 nfs41_setup_sequence(clp->cl_session, args, res, task);
7186 static const struct rpc_call_ops nfs41_sequence_ops = {
7187 .rpc_call_done = nfs41_sequence_call_done,
7188 .rpc_call_prepare = nfs41_sequence_prepare,
7189 .rpc_release = nfs41_sequence_release,
7192 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7193 struct rpc_cred *cred,
7196 struct nfs4_sequence_data *calldata;
7197 struct rpc_message msg = {
7198 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7201 struct rpc_task_setup task_setup_data = {
7202 .rpc_client = clp->cl_rpcclient,
7203 .rpc_message = &msg,
7204 .callback_ops = &nfs41_sequence_ops,
7205 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
7208 if (!atomic_inc_not_zero(&clp->cl_count))
7209 return ERR_PTR(-EIO);
7210 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7211 if (calldata == NULL) {
7212 nfs_put_client(clp);
7213 return ERR_PTR(-ENOMEM);
7215 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
7217 nfs4_set_sequence_privileged(&calldata->args);
7218 msg.rpc_argp = &calldata->args;
7219 msg.rpc_resp = &calldata->res;
7220 calldata->clp = clp;
7221 task_setup_data.callback_data = calldata;
7223 return rpc_run_task(&task_setup_data);
7226 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
7228 struct rpc_task *task;
7231 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
7233 task = _nfs41_proc_sequence(clp, cred, false);
7235 ret = PTR_ERR(task);
7237 rpc_put_task_async(task);
7238 dprintk("<-- %s status=%d\n", __func__, ret);
7242 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7244 struct rpc_task *task;
7247 task = _nfs41_proc_sequence(clp, cred, true);
7249 ret = PTR_ERR(task);
7252 ret = rpc_wait_for_completion_task(task);
7254 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7256 if (task->tk_status == 0)
7257 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
7258 ret = task->tk_status;
7262 dprintk("<-- %s status=%d\n", __func__, ret);
7266 struct nfs4_reclaim_complete_data {
7267 struct nfs_client *clp;
7268 struct nfs41_reclaim_complete_args arg;
7269 struct nfs41_reclaim_complete_res res;
7272 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7274 struct nfs4_reclaim_complete_data *calldata = data;
7276 nfs41_setup_sequence(calldata->clp->cl_session,
7277 &calldata->arg.seq_args,
7278 &calldata->res.seq_res,
7282 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7284 switch(task->tk_status) {
7286 case -NFS4ERR_COMPLETE_ALREADY:
7287 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7289 case -NFS4ERR_DELAY:
7290 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7292 case -NFS4ERR_RETRY_UNCACHED_REP:
7295 nfs4_schedule_lease_recovery(clp);
7300 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7302 struct nfs4_reclaim_complete_data *calldata = data;
7303 struct nfs_client *clp = calldata->clp;
7304 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7306 dprintk("--> %s\n", __func__);
7307 if (!nfs41_sequence_done(task, res))
7310 trace_nfs4_reclaim_complete(clp, task->tk_status);
7311 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7312 rpc_restart_call_prepare(task);
7315 dprintk("<-- %s\n", __func__);
7318 static void nfs4_free_reclaim_complete_data(void *data)
7320 struct nfs4_reclaim_complete_data *calldata = data;
7325 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7326 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7327 .rpc_call_done = nfs4_reclaim_complete_done,
7328 .rpc_release = nfs4_free_reclaim_complete_data,
7332 * Issue a global reclaim complete.
7334 static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7335 struct rpc_cred *cred)
7337 struct nfs4_reclaim_complete_data *calldata;
7338 struct rpc_task *task;
7339 struct rpc_message msg = {
7340 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
7343 struct rpc_task_setup task_setup_data = {
7344 .rpc_client = clp->cl_rpcclient,
7345 .rpc_message = &msg,
7346 .callback_ops = &nfs4_reclaim_complete_call_ops,
7347 .flags = RPC_TASK_ASYNC,
7349 int status = -ENOMEM;
7351 dprintk("--> %s\n", __func__);
7352 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7353 if (calldata == NULL)
7355 calldata->clp = clp;
7356 calldata->arg.one_fs = 0;
7358 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
7359 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
7360 msg.rpc_argp = &calldata->arg;
7361 msg.rpc_resp = &calldata->res;
7362 task_setup_data.callback_data = calldata;
7363 task = rpc_run_task(&task_setup_data);
7365 status = PTR_ERR(task);
7368 status = nfs4_wait_for_completion_rpc_task(task);
7370 status = task->tk_status;
7374 dprintk("<-- %s status=%d\n", __func__, status);
7379 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7381 struct nfs4_layoutget *lgp = calldata;
7382 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
7383 struct nfs4_session *session = nfs4_get_session(server);
7385 dprintk("--> %s\n", __func__);
7386 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7387 * right now covering the LAYOUTGET we are about to send.
7388 * However, that is not so catastrophic, and there seems
7389 * to be no way to prevent it completely.
7391 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
7392 &lgp->res.seq_res, task))
7394 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7395 NFS_I(lgp->args.inode)->layout,
7396 lgp->args.ctx->state)) {
7397 rpc_exit(task, NFS4_OK);
7401 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7403 struct nfs4_layoutget *lgp = calldata;
7404 struct inode *inode = lgp->args.inode;
7405 struct nfs_server *server = NFS_SERVER(inode);
7406 struct pnfs_layout_hdr *lo;
7407 struct nfs4_state *state = NULL;
7408 unsigned long timeo, now, giveup;
7410 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
7412 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
7415 switch (task->tk_status) {
7419 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7420 * (or clients) writing to the same RAID stripe
7422 case -NFS4ERR_LAYOUTTRYLATER:
7424 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7425 * existing layout before getting a new one).
7427 case -NFS4ERR_RECALLCONFLICT:
7428 timeo = rpc_get_timeout(task->tk_client);
7429 giveup = lgp->args.timestamp + timeo;
7431 if (time_after(giveup, now)) {
7432 unsigned long delay;
7435 * - Not less then NFS4_POLL_RETRY_MIN.
7436 * - One last time a jiffie before we give up
7437 * - exponential backoff (time_now minus start_attempt)
7439 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7440 min((giveup - now - 1),
7441 now - lgp->args.timestamp));
7443 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7445 rpc_delay(task, delay);
7446 task->tk_status = 0;
7447 rpc_restart_call_prepare(task);
7448 goto out; /* Do not call nfs4_async_handle_error() */
7451 case -NFS4ERR_EXPIRED:
7452 case -NFS4ERR_BAD_STATEID:
7453 spin_lock(&inode->i_lock);
7454 lo = NFS_I(inode)->layout;
7455 if (!lo || list_empty(&lo->plh_segs)) {
7456 spin_unlock(&inode->i_lock);
7457 /* If the open stateid was bad, then recover it. */
7458 state = lgp->args.ctx->state;
7462 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7463 spin_unlock(&inode->i_lock);
7464 /* Mark the bad layout state as invalid, then
7465 * retry using the open stateid. */
7466 pnfs_free_lseg_list(&head);
7469 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
7470 rpc_restart_call_prepare(task);
7472 dprintk("<-- %s\n", __func__);
7475 static size_t max_response_pages(struct nfs_server *server)
7477 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7478 return nfs_page_array_len(0, max_resp_sz);
7481 static void nfs4_free_pages(struct page **pages, size_t size)
7488 for (i = 0; i < size; i++) {
7491 __free_page(pages[i]);
7496 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7498 struct page **pages;
7501 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7503 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7507 for (i = 0; i < size; i++) {
7508 pages[i] = alloc_page(gfp_flags);
7510 dprintk("%s: failed to allocate page\n", __func__);
7511 nfs4_free_pages(pages, size);
7519 static void nfs4_layoutget_release(void *calldata)
7521 struct nfs4_layoutget *lgp = calldata;
7522 struct inode *inode = lgp->args.inode;
7523 struct nfs_server *server = NFS_SERVER(inode);
7524 size_t max_pages = max_response_pages(server);
7526 dprintk("--> %s\n", __func__);
7527 nfs4_free_pages(lgp->args.layout.pages, max_pages);
7528 pnfs_put_layout_hdr(NFS_I(inode)->layout);
7529 put_nfs_open_context(lgp->args.ctx);
7531 dprintk("<-- %s\n", __func__);
7534 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7535 .rpc_call_prepare = nfs4_layoutget_prepare,
7536 .rpc_call_done = nfs4_layoutget_done,
7537 .rpc_release = nfs4_layoutget_release,
7540 struct pnfs_layout_segment *
7541 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
7543 struct inode *inode = lgp->args.inode;
7544 struct nfs_server *server = NFS_SERVER(inode);
7545 size_t max_pages = max_response_pages(server);
7546 struct rpc_task *task;
7547 struct rpc_message msg = {
7548 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7549 .rpc_argp = &lgp->args,
7550 .rpc_resp = &lgp->res,
7551 .rpc_cred = lgp->cred,
7553 struct rpc_task_setup task_setup_data = {
7554 .rpc_client = server->client,
7555 .rpc_message = &msg,
7556 .callback_ops = &nfs4_layoutget_call_ops,
7557 .callback_data = lgp,
7558 .flags = RPC_TASK_ASYNC,
7560 struct pnfs_layout_segment *lseg = NULL;
7563 dprintk("--> %s\n", __func__);
7565 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7566 if (!lgp->args.layout.pages) {
7567 nfs4_layoutget_release(lgp);
7568 return ERR_PTR(-ENOMEM);
7570 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
7571 lgp->args.timestamp = jiffies;
7573 lgp->res.layoutp = &lgp->args.layout;
7574 lgp->res.seq_res.sr_slot = NULL;
7575 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
7577 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7578 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7580 task = rpc_run_task(&task_setup_data);
7582 return ERR_CAST(task);
7583 status = nfs4_wait_for_completion_rpc_task(task);
7585 status = task->tk_status;
7586 trace_nfs4_layoutget(lgp->args.ctx,
7590 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7591 if (status == 0 && lgp->res.layoutp->len)
7592 lseg = pnfs_layout_process(lgp);
7594 dprintk("<-- %s status=%d\n", __func__, status);
7596 return ERR_PTR(status);
7601 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7603 struct nfs4_layoutreturn *lrp = calldata;
7605 dprintk("--> %s\n", __func__);
7606 nfs41_setup_sequence(lrp->clp->cl_session,
7607 &lrp->args.seq_args,
7612 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7614 struct nfs4_layoutreturn *lrp = calldata;
7615 struct nfs_server *server;
7617 dprintk("--> %s\n", __func__);
7619 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
7622 server = NFS_SERVER(lrp->args.inode);
7623 switch (task->tk_status) {
7625 task->tk_status = 0;
7628 case -NFS4ERR_DELAY:
7629 if (nfs4_async_handle_error(task, server, NULL) != -EAGAIN)
7631 rpc_restart_call_prepare(task);
7634 dprintk("<-- %s\n", __func__);
7637 static void nfs4_layoutreturn_release(void *calldata)
7639 struct nfs4_layoutreturn *lrp = calldata;
7640 struct pnfs_layout_hdr *lo = lrp->args.layout;
7642 dprintk("--> %s\n", __func__);
7643 spin_lock(&lo->plh_inode->i_lock);
7644 if (lrp->res.lrs_present)
7645 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7646 lo->plh_block_lgets--;
7647 spin_unlock(&lo->plh_inode->i_lock);
7648 pnfs_put_layout_hdr(lrp->args.layout);
7650 dprintk("<-- %s\n", __func__);
7653 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7654 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7655 .rpc_call_done = nfs4_layoutreturn_done,
7656 .rpc_release = nfs4_layoutreturn_release,
7659 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
7661 struct rpc_task *task;
7662 struct rpc_message msg = {
7663 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7664 .rpc_argp = &lrp->args,
7665 .rpc_resp = &lrp->res,
7666 .rpc_cred = lrp->cred,
7668 struct rpc_task_setup task_setup_data = {
7669 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
7670 .rpc_message = &msg,
7671 .callback_ops = &nfs4_layoutreturn_call_ops,
7672 .callback_data = lrp,
7676 dprintk("--> %s\n", __func__);
7677 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
7678 task = rpc_run_task(&task_setup_data);
7680 return PTR_ERR(task);
7681 status = task->tk_status;
7682 trace_nfs4_layoutreturn(lrp->args.inode, status);
7683 dprintk("<-- %s status=%d\n", __func__, status);
7689 * Retrieve the list of Data Server devices from the MDS.
7691 static int _nfs4_getdevicelist(struct nfs_server *server,
7692 const struct nfs_fh *fh,
7693 struct pnfs_devicelist *devlist)
7695 struct nfs4_getdevicelist_args args = {
7697 .layoutclass = server->pnfs_curr_ld->id,
7699 struct nfs4_getdevicelist_res res = {
7702 struct rpc_message msg = {
7703 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
7709 dprintk("--> %s\n", __func__);
7710 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
7712 dprintk("<-- %s status=%d\n", __func__, status);
7716 int nfs4_proc_getdevicelist(struct nfs_server *server,
7717 const struct nfs_fh *fh,
7718 struct pnfs_devicelist *devlist)
7720 struct nfs4_exception exception = { };
7724 err = nfs4_handle_exception(server,
7725 _nfs4_getdevicelist(server, fh, devlist),
7727 } while (exception.retry);
7729 dprintk("%s: err=%d, num_devs=%u\n", __func__,
7730 err, devlist->num_devs);
7734 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
7737 _nfs4_proc_getdeviceinfo(struct nfs_server *server,
7738 struct pnfs_device *pdev,
7739 struct rpc_cred *cred)
7741 struct nfs4_getdeviceinfo_args args = {
7744 struct nfs4_getdeviceinfo_res res = {
7747 struct rpc_message msg = {
7748 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7755 dprintk("--> %s\n", __func__);
7756 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
7757 dprintk("<-- %s status=%d\n", __func__, status);
7762 int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7763 struct pnfs_device *pdev,
7764 struct rpc_cred *cred)
7766 struct nfs4_exception exception = { };
7770 err = nfs4_handle_exception(server,
7771 _nfs4_proc_getdeviceinfo(server, pdev, cred),
7773 } while (exception.retry);
7776 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7778 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7780 struct nfs4_layoutcommit_data *data = calldata;
7781 struct nfs_server *server = NFS_SERVER(data->args.inode);
7782 struct nfs4_session *session = nfs4_get_session(server);
7784 nfs41_setup_sequence(session,
7785 &data->args.seq_args,
7791 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7793 struct nfs4_layoutcommit_data *data = calldata;
7794 struct nfs_server *server = NFS_SERVER(data->args.inode);
7796 if (!nfs41_sequence_done(task, &data->res.seq_res))
7799 switch (task->tk_status) { /* Just ignore these failures */
7800 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7801 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7802 case -NFS4ERR_BADLAYOUT: /* no layout */
7803 case -NFS4ERR_GRACE: /* loca_recalim always false */
7804 task->tk_status = 0;
7808 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
7809 rpc_restart_call_prepare(task);
7815 static void nfs4_layoutcommit_release(void *calldata)
7817 struct nfs4_layoutcommit_data *data = calldata;
7819 pnfs_cleanup_layoutcommit(data);
7820 nfs_post_op_update_inode_force_wcc(data->args.inode,
7822 put_rpccred(data->cred);
7826 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7827 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7828 .rpc_call_done = nfs4_layoutcommit_done,
7829 .rpc_release = nfs4_layoutcommit_release,
7833 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
7835 struct rpc_message msg = {
7836 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7837 .rpc_argp = &data->args,
7838 .rpc_resp = &data->res,
7839 .rpc_cred = data->cred,
7841 struct rpc_task_setup task_setup_data = {
7842 .task = &data->task,
7843 .rpc_client = NFS_CLIENT(data->args.inode),
7844 .rpc_message = &msg,
7845 .callback_ops = &nfs4_layoutcommit_ops,
7846 .callback_data = data,
7847 .flags = RPC_TASK_ASYNC,
7849 struct rpc_task *task;
7852 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7853 "lbw: %llu inode %lu\n",
7854 data->task.tk_pid, sync,
7855 data->args.lastbytewritten,
7856 data->args.inode->i_ino);
7858 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
7859 task = rpc_run_task(&task_setup_data);
7861 return PTR_ERR(task);
7864 status = nfs4_wait_for_completion_rpc_task(task);
7867 status = task->tk_status;
7868 trace_nfs4_layoutcommit(data->args.inode, status);
7870 dprintk("%s: status %d\n", __func__, status);
7876 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7877 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7880 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7881 struct nfs_fsinfo *info,
7882 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
7884 struct nfs41_secinfo_no_name_args args = {
7885 .style = SECINFO_STYLE_CURRENT_FH,
7887 struct nfs4_secinfo_res res = {
7890 struct rpc_message msg = {
7891 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
7895 struct rpc_clnt *clnt = server->client;
7896 struct rpc_cred *cred = NULL;
7899 if (use_integrity) {
7900 clnt = server->nfs_client->cl_rpcclient;
7901 cred = nfs4_get_clid_cred(server->nfs_client);
7902 msg.rpc_cred = cred;
7905 dprintk("--> %s\n", __func__);
7906 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
7908 dprintk("<-- %s status=%d\n", __func__, status);
7917 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7918 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7920 struct nfs4_exception exception = { };
7923 /* first try using integrity protection */
7924 err = -NFS4ERR_WRONGSEC;
7926 /* try to use integrity protection with machine cred */
7927 if (_nfs4_is_integrity_protected(server->nfs_client))
7928 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
7932 * if unable to use integrity protection, or SECINFO with
7933 * integrity protection returns NFS4ERR_WRONGSEC (which is
7934 * disallowed by spec, but exists in deployed servers) use
7935 * the current filesystem's rpc_client and the user cred.
7937 if (err == -NFS4ERR_WRONGSEC)
7938 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
7943 case -NFS4ERR_WRONGSEC:
7947 err = nfs4_handle_exception(server, err, &exception);
7949 } while (exception.retry);
7955 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
7956 struct nfs_fsinfo *info)
7960 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
7961 struct nfs4_secinfo_flavors *flavors;
7962 struct nfs4_secinfo4 *secinfo;
7965 page = alloc_page(GFP_KERNEL);
7971 flavors = page_address(page);
7972 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7975 * Fall back on "guess and check" method if
7976 * the server doesn't support SECINFO_NO_NAME
7978 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
7979 err = nfs4_find_root_sec(server, fhandle, info);
7985 for (i = 0; i < flavors->num_flavors; i++) {
7986 secinfo = &flavors->flavors[i];
7988 switch (secinfo->flavor) {
7992 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
7993 &secinfo->flavor_info);
7996 flavor = RPC_AUTH_MAXFLAVOR;
8000 if (!nfs_auth_info_match(&server->auth_info, flavor))
8001 flavor = RPC_AUTH_MAXFLAVOR;
8003 if (flavor != RPC_AUTH_MAXFLAVOR) {
8004 err = nfs4_lookup_root_sec(server, fhandle,
8011 if (flavor == RPC_AUTH_MAXFLAVOR)
8022 static int _nfs41_test_stateid(struct nfs_server *server,
8023 nfs4_stateid *stateid,
8024 struct rpc_cred *cred)
8027 struct nfs41_test_stateid_args args = {
8030 struct nfs41_test_stateid_res res;
8031 struct rpc_message msg = {
8032 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8037 struct rpc_clnt *rpc_client = server->client;
8039 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8042 dprintk("NFS call test_stateid %p\n", stateid);
8043 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8044 nfs4_set_sequence_privileged(&args.seq_args);
8045 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8046 &args.seq_args, &res.seq_res);
8047 if (status != NFS_OK) {
8048 dprintk("NFS reply test_stateid: failed, %d\n", status);
8051 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
8056 * nfs41_test_stateid - perform a TEST_STATEID operation
8058 * @server: server / transport on which to perform the operation
8059 * @stateid: state ID to test
8062 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8063 * Otherwise a negative NFS4ERR value is returned if the operation
8064 * failed or the state ID is not currently valid.
8066 static int nfs41_test_stateid(struct nfs_server *server,
8067 nfs4_stateid *stateid,
8068 struct rpc_cred *cred)
8070 struct nfs4_exception exception = { };
8073 err = _nfs41_test_stateid(server, stateid, cred);
8074 if (err != -NFS4ERR_DELAY)
8076 nfs4_handle_exception(server, err, &exception);
8077 } while (exception.retry);
8081 struct nfs_free_stateid_data {
8082 struct nfs_server *server;
8083 struct nfs41_free_stateid_args args;
8084 struct nfs41_free_stateid_res res;
8087 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8089 struct nfs_free_stateid_data *data = calldata;
8090 nfs41_setup_sequence(nfs4_get_session(data->server),
8091 &data->args.seq_args,
8096 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8098 struct nfs_free_stateid_data *data = calldata;
8100 nfs41_sequence_done(task, &data->res.seq_res);
8102 switch (task->tk_status) {
8103 case -NFS4ERR_DELAY:
8104 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
8105 rpc_restart_call_prepare(task);
8109 static void nfs41_free_stateid_release(void *calldata)
8114 static const struct rpc_call_ops nfs41_free_stateid_ops = {
8115 .rpc_call_prepare = nfs41_free_stateid_prepare,
8116 .rpc_call_done = nfs41_free_stateid_done,
8117 .rpc_release = nfs41_free_stateid_release,
8120 static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8121 nfs4_stateid *stateid,
8122 struct rpc_cred *cred,
8125 struct rpc_message msg = {
8126 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
8129 struct rpc_task_setup task_setup = {
8130 .rpc_client = server->client,
8131 .rpc_message = &msg,
8132 .callback_ops = &nfs41_free_stateid_ops,
8133 .flags = RPC_TASK_ASYNC,
8135 struct nfs_free_stateid_data *data;
8137 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8138 &task_setup.rpc_client, &msg);
8140 dprintk("NFS call free_stateid %p\n", stateid);
8141 data = kmalloc(sizeof(*data), GFP_NOFS);
8143 return ERR_PTR(-ENOMEM);
8144 data->server = server;
8145 nfs4_stateid_copy(&data->args.stateid, stateid);
8147 task_setup.callback_data = data;
8149 msg.rpc_argp = &data->args;
8150 msg.rpc_resp = &data->res;
8151 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
8153 nfs4_set_sequence_privileged(&data->args.seq_args);
8155 return rpc_run_task(&task_setup);
8159 * nfs41_free_stateid - perform a FREE_STATEID operation
8161 * @server: server / transport on which to perform the operation
8162 * @stateid: state ID to release
8165 * Returns NFS_OK if the server freed "stateid". Otherwise a
8166 * negative NFS4ERR value is returned.
8168 static int nfs41_free_stateid(struct nfs_server *server,
8169 nfs4_stateid *stateid,
8170 struct rpc_cred *cred)
8172 struct rpc_task *task;
8175 task = _nfs41_free_stateid(server, stateid, cred, true);
8177 return PTR_ERR(task);
8178 ret = rpc_wait_for_completion_task(task);
8180 ret = task->tk_status;
8185 static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
8187 struct rpc_task *task;
8188 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
8190 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
8191 nfs4_free_lock_state(server, lsp);
8193 return PTR_ERR(task);
8198 static bool nfs41_match_stateid(const nfs4_stateid *s1,
8199 const nfs4_stateid *s2)
8201 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
8204 if (s1->seqid == s2->seqid)
8206 if (s1->seqid == 0 || s2->seqid == 0)
8212 #endif /* CONFIG_NFS_V4_1 */
8214 static bool nfs4_match_stateid(const nfs4_stateid *s1,
8215 const nfs4_stateid *s2)
8217 return nfs4_stateid_match(s1, s2);
8221 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
8222 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8223 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8224 .recover_open = nfs4_open_reclaim,
8225 .recover_lock = nfs4_lock_reclaim,
8226 .establish_clid = nfs4_init_clientid,
8227 .detect_trunking = nfs40_discover_server_trunking,
8230 #if defined(CONFIG_NFS_V4_1)
8231 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
8232 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8233 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8234 .recover_open = nfs4_open_reclaim,
8235 .recover_lock = nfs4_lock_reclaim,
8236 .establish_clid = nfs41_init_clientid,
8237 .reclaim_complete = nfs41_proc_reclaim_complete,
8238 .detect_trunking = nfs41_discover_server_trunking,
8240 #endif /* CONFIG_NFS_V4_1 */
8242 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
8243 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8244 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8245 .recover_open = nfs4_open_expired,
8246 .recover_lock = nfs4_lock_expired,
8247 .establish_clid = nfs4_init_clientid,
8250 #if defined(CONFIG_NFS_V4_1)
8251 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
8252 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8253 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8254 .recover_open = nfs41_open_expired,
8255 .recover_lock = nfs41_lock_expired,
8256 .establish_clid = nfs41_init_clientid,
8258 #endif /* CONFIG_NFS_V4_1 */
8260 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
8261 .sched_state_renewal = nfs4_proc_async_renew,
8262 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8263 .renew_lease = nfs4_proc_renew,
8266 #if defined(CONFIG_NFS_V4_1)
8267 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
8268 .sched_state_renewal = nfs41_proc_async_sequence,
8269 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8270 .renew_lease = nfs4_proc_sequence,
8274 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
8275 .get_locations = _nfs40_proc_get_locations,
8276 .fsid_present = _nfs40_proc_fsid_present,
8279 #if defined(CONFIG_NFS_V4_1)
8280 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
8281 .get_locations = _nfs41_proc_get_locations,
8282 .fsid_present = _nfs41_proc_fsid_present,
8284 #endif /* CONFIG_NFS_V4_1 */
8286 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8288 .init_caps = NFS_CAP_READDIRPLUS
8289 | NFS_CAP_ATOMIC_OPEN
8290 | NFS_CAP_CHANGE_ATTR
8291 | NFS_CAP_POSIX_LOCK,
8292 .init_client = nfs40_init_client,
8293 .shutdown_client = nfs40_shutdown_client,
8294 .match_stateid = nfs4_match_stateid,
8295 .find_root_sec = nfs4_find_root_sec,
8296 .free_lock_state = nfs4_release_lockowner,
8297 .call_sync_ops = &nfs40_call_sync_ops,
8298 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8299 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8300 .state_renewal_ops = &nfs40_state_renewal_ops,
8301 .mig_recovery_ops = &nfs40_mig_recovery_ops,
8304 #if defined(CONFIG_NFS_V4_1)
8305 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8307 .init_caps = NFS_CAP_READDIRPLUS
8308 | NFS_CAP_ATOMIC_OPEN
8309 | NFS_CAP_CHANGE_ATTR
8310 | NFS_CAP_POSIX_LOCK
8311 | NFS_CAP_STATEID_NFSV41
8312 | NFS_CAP_ATOMIC_OPEN_V1,
8313 .init_client = nfs41_init_client,
8314 .shutdown_client = nfs41_shutdown_client,
8315 .match_stateid = nfs41_match_stateid,
8316 .find_root_sec = nfs41_find_root_sec,
8317 .free_lock_state = nfs41_free_lock_state,
8318 .call_sync_ops = &nfs41_call_sync_ops,
8319 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8320 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8321 .state_renewal_ops = &nfs41_state_renewal_ops,
8322 .mig_recovery_ops = &nfs41_mig_recovery_ops,
8326 #if defined(CONFIG_NFS_V4_2)
8327 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8329 .init_caps = NFS_CAP_READDIRPLUS
8330 | NFS_CAP_ATOMIC_OPEN
8331 | NFS_CAP_CHANGE_ATTR
8332 | NFS_CAP_POSIX_LOCK
8333 | NFS_CAP_STATEID_NFSV41
8334 | NFS_CAP_ATOMIC_OPEN_V1,
8335 .init_client = nfs41_init_client,
8336 .shutdown_client = nfs41_shutdown_client,
8337 .match_stateid = nfs41_match_stateid,
8338 .find_root_sec = nfs41_find_root_sec,
8339 .free_lock_state = nfs41_free_lock_state,
8340 .call_sync_ops = &nfs41_call_sync_ops,
8341 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8342 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8343 .state_renewal_ops = &nfs41_state_renewal_ops,
8347 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8348 [0] = &nfs_v4_0_minor_ops,
8349 #if defined(CONFIG_NFS_V4_1)
8350 [1] = &nfs_v4_1_minor_ops,
8352 #if defined(CONFIG_NFS_V4_2)
8353 [2] = &nfs_v4_2_minor_ops,
8357 static const struct inode_operations nfs4_dir_inode_operations = {
8358 .create = nfs_create,
8359 .lookup = nfs_lookup,
8360 .atomic_open = nfs_atomic_open,
8362 .unlink = nfs_unlink,
8363 .symlink = nfs_symlink,
8367 .rename = nfs_rename,
8368 .permission = nfs_permission,
8369 .getattr = nfs_getattr,
8370 .setattr = nfs_setattr,
8371 .getxattr = generic_getxattr,
8372 .setxattr = generic_setxattr,
8373 .listxattr = generic_listxattr,
8374 .removexattr = generic_removexattr,
8377 static const struct inode_operations nfs4_file_inode_operations = {
8378 .permission = nfs_permission,
8379 .getattr = nfs_getattr,
8380 .setattr = nfs_setattr,
8381 .getxattr = generic_getxattr,
8382 .setxattr = generic_setxattr,
8383 .listxattr = generic_listxattr,
8384 .removexattr = generic_removexattr,
8387 const struct nfs_rpc_ops nfs_v4_clientops = {
8388 .version = 4, /* protocol version */
8389 .dentry_ops = &nfs4_dentry_operations,
8390 .dir_inode_ops = &nfs4_dir_inode_operations,
8391 .file_inode_ops = &nfs4_file_inode_operations,
8392 .file_ops = &nfs4_file_operations,
8393 .getroot = nfs4_proc_get_root,
8394 .submount = nfs4_submount,
8395 .try_mount = nfs4_try_mount,
8396 .getattr = nfs4_proc_getattr,
8397 .setattr = nfs4_proc_setattr,
8398 .lookup = nfs4_proc_lookup,
8399 .access = nfs4_proc_access,
8400 .readlink = nfs4_proc_readlink,
8401 .create = nfs4_proc_create,
8402 .remove = nfs4_proc_remove,
8403 .unlink_setup = nfs4_proc_unlink_setup,
8404 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
8405 .unlink_done = nfs4_proc_unlink_done,
8406 .rename_setup = nfs4_proc_rename_setup,
8407 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
8408 .rename_done = nfs4_proc_rename_done,
8409 .link = nfs4_proc_link,
8410 .symlink = nfs4_proc_symlink,
8411 .mkdir = nfs4_proc_mkdir,
8412 .rmdir = nfs4_proc_remove,
8413 .readdir = nfs4_proc_readdir,
8414 .mknod = nfs4_proc_mknod,
8415 .statfs = nfs4_proc_statfs,
8416 .fsinfo = nfs4_proc_fsinfo,
8417 .pathconf = nfs4_proc_pathconf,
8418 .set_capabilities = nfs4_server_capabilities,
8419 .decode_dirent = nfs4_decode_dirent,
8420 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
8421 .read_setup = nfs4_proc_read_setup,
8422 .read_done = nfs4_read_done,
8423 .write_setup = nfs4_proc_write_setup,
8424 .write_done = nfs4_write_done,
8425 .commit_setup = nfs4_proc_commit_setup,
8426 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
8427 .commit_done = nfs4_commit_done,
8428 .lock = nfs4_proc_lock,
8429 .clear_acl_cache = nfs4_zap_acl_attr,
8430 .close_context = nfs4_close_context,
8431 .open_context = nfs4_atomic_open,
8432 .have_delegation = nfs4_have_delegation,
8433 .return_delegation = nfs4_inode_return_delegation,
8434 .alloc_client = nfs4_alloc_client,
8435 .init_client = nfs4_init_client,
8436 .free_client = nfs4_free_client,
8437 .create_server = nfs4_create_server,
8438 .clone_server = nfs_clone_server,
8441 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8442 .prefix = XATTR_NAME_NFSV4_ACL,
8443 .list = nfs4_xattr_list_nfs4_acl,
8444 .get = nfs4_xattr_get_nfs4_acl,
8445 .set = nfs4_xattr_set_nfs4_acl,
8448 const struct xattr_handler *nfs4_xattr_handlers[] = {
8449 &nfs4_xattr_nfs4_acl_handler,
8450 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
8451 &nfs4_xattr_nfs4_label_handler,