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 *, long *);
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 long nfs4_update_delay(long *timeout)
321 return NFS4_POLL_RETRY_MAX;
323 *timeout = NFS4_POLL_RETRY_MIN;
324 if (*timeout > NFS4_POLL_RETRY_MAX)
325 *timeout = NFS4_POLL_RETRY_MAX;
331 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
337 freezable_schedule_timeout_killable_unsafe(
338 nfs4_update_delay(timeout));
339 if (fatal_signal_pending(current))
344 /* This is the error handling routine for processes that are allowed
347 static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
349 struct nfs_client *clp = server->nfs_client;
350 struct nfs4_state *state = exception->state;
351 struct inode *inode = exception->inode;
354 exception->retry = 0;
358 case -NFS4ERR_OPENMODE:
359 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
360 nfs4_inode_return_delegation(inode);
361 exception->retry = 1;
366 ret = nfs4_schedule_stateid_recovery(server, state);
369 goto wait_on_recovery;
370 case -NFS4ERR_DELEG_REVOKED:
371 case -NFS4ERR_ADMIN_REVOKED:
372 case -NFS4ERR_BAD_STATEID:
373 if (inode != NULL && nfs4_have_delegation(inode, FMODE_READ)) {
374 nfs_remove_bad_delegation(inode);
375 exception->retry = 1;
380 ret = nfs4_schedule_stateid_recovery(server, state);
383 goto wait_on_recovery;
384 case -NFS4ERR_EXPIRED:
386 ret = nfs4_schedule_stateid_recovery(server, state);
390 case -NFS4ERR_STALE_STATEID:
391 case -NFS4ERR_STALE_CLIENTID:
392 nfs4_schedule_lease_recovery(clp);
393 goto wait_on_recovery;
395 ret = nfs4_schedule_migration_recovery(server);
398 goto wait_on_recovery;
399 case -NFS4ERR_LEASE_MOVED:
400 nfs4_schedule_lease_moved_recovery(clp);
401 goto wait_on_recovery;
402 #if defined(CONFIG_NFS_V4_1)
403 case -NFS4ERR_BADSESSION:
404 case -NFS4ERR_BADSLOT:
405 case -NFS4ERR_BAD_HIGH_SLOT:
406 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
407 case -NFS4ERR_DEADSESSION:
408 case -NFS4ERR_SEQ_FALSE_RETRY:
409 case -NFS4ERR_SEQ_MISORDERED:
410 dprintk("%s ERROR: %d Reset session\n", __func__,
412 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
413 goto wait_on_recovery;
414 #endif /* defined(CONFIG_NFS_V4_1) */
415 case -NFS4ERR_FILE_OPEN:
416 if (exception->timeout > HZ) {
417 /* We have retried a decent amount, time to
425 ret = nfs4_delay(server->client, &exception->timeout);
428 case -NFS4ERR_RETRY_UNCACHED_REP:
429 case -NFS4ERR_OLD_STATEID:
430 exception->retry = 1;
432 case -NFS4ERR_BADOWNER:
433 /* The following works around a Linux server bug! */
434 case -NFS4ERR_BADNAME:
435 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
436 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
437 exception->retry = 1;
438 printk(KERN_WARNING "NFS: v4 server %s "
439 "does not accept raw "
441 "Reenabling the idmapper.\n",
442 server->nfs_client->cl_hostname);
445 /* We failed to handle the error */
446 return nfs4_map_errors(ret);
448 ret = nfs4_wait_clnt_recover(clp);
449 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
452 exception->retry = 1;
457 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
458 * or 'false' otherwise.
460 static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
462 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
464 if (flavor == RPC_AUTH_GSS_KRB5I ||
465 flavor == RPC_AUTH_GSS_KRB5P)
471 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
473 spin_lock(&clp->cl_lock);
474 if (time_before(clp->cl_last_renewal,timestamp))
475 clp->cl_last_renewal = timestamp;
476 spin_unlock(&clp->cl_lock);
479 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
481 do_renew_lease(server->nfs_client, timestamp);
484 struct nfs4_call_sync_data {
485 const struct nfs_server *seq_server;
486 struct nfs4_sequence_args *seq_args;
487 struct nfs4_sequence_res *seq_res;
490 static void nfs4_init_sequence(struct nfs4_sequence_args *args,
491 struct nfs4_sequence_res *res, int cache_reply)
493 args->sa_slot = NULL;
494 args->sa_cache_this = cache_reply;
495 args->sa_privileged = 0;
500 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
502 args->sa_privileged = 1;
505 static int nfs40_setup_sequence(const struct nfs_server *server,
506 struct nfs4_sequence_args *args,
507 struct nfs4_sequence_res *res,
508 struct rpc_task *task)
510 struct nfs4_slot_table *tbl = server->nfs_client->cl_slot_tbl;
511 struct nfs4_slot *slot;
513 /* slot already allocated? */
514 if (res->sr_slot != NULL)
517 spin_lock(&tbl->slot_tbl_lock);
518 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
521 slot = nfs4_alloc_slot(tbl);
523 if (slot == ERR_PTR(-ENOMEM))
524 task->tk_timeout = HZ >> 2;
527 spin_unlock(&tbl->slot_tbl_lock);
529 args->sa_slot = slot;
533 rpc_call_start(task);
537 if (args->sa_privileged)
538 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
539 NULL, RPC_PRIORITY_PRIVILEGED);
541 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
542 spin_unlock(&tbl->slot_tbl_lock);
546 static int nfs40_sequence_done(struct rpc_task *task,
547 struct nfs4_sequence_res *res)
549 struct nfs4_slot *slot = res->sr_slot;
550 struct nfs4_slot_table *tbl;
556 spin_lock(&tbl->slot_tbl_lock);
557 if (!nfs41_wake_and_assign_slot(tbl, slot))
558 nfs4_free_slot(tbl, slot);
559 spin_unlock(&tbl->slot_tbl_lock);
566 #if defined(CONFIG_NFS_V4_1)
568 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
570 struct nfs4_session *session;
571 struct nfs4_slot_table *tbl;
572 struct nfs4_slot *slot = res->sr_slot;
573 bool send_new_highest_used_slotid = false;
576 session = tbl->session;
578 spin_lock(&tbl->slot_tbl_lock);
579 /* Be nice to the server: try to ensure that the last transmitted
580 * value for highest_user_slotid <= target_highest_slotid
582 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
583 send_new_highest_used_slotid = true;
585 if (nfs41_wake_and_assign_slot(tbl, slot)) {
586 send_new_highest_used_slotid = false;
589 nfs4_free_slot(tbl, slot);
591 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
592 send_new_highest_used_slotid = false;
594 spin_unlock(&tbl->slot_tbl_lock);
596 if (send_new_highest_used_slotid)
597 nfs41_server_notify_highest_slotid_update(session->clp);
600 int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
602 struct nfs4_session *session;
603 struct nfs4_slot *slot = res->sr_slot;
604 struct nfs_client *clp;
605 bool interrupted = false;
610 /* don't increment the sequence number if the task wasn't sent */
611 if (!RPC_WAS_SENT(task))
614 session = slot->table->session;
616 if (slot->interrupted) {
617 slot->interrupted = 0;
621 trace_nfs4_sequence_done(session, res);
622 /* Check the SEQUENCE operation status */
623 switch (res->sr_status) {
625 /* Update the slot's sequence and clientid lease timer */
628 do_renew_lease(clp, res->sr_timestamp);
629 /* Check sequence flags */
630 if (res->sr_status_flags != 0)
631 nfs4_schedule_lease_recovery(clp);
632 nfs41_update_target_slotid(slot->table, slot, res);
636 * sr_status remains 1 if an RPC level error occurred.
637 * The server may or may not have processed the sequence
639 * Mark the slot as having hosted an interrupted RPC call.
641 slot->interrupted = 1;
644 /* The server detected a resend of the RPC call and
645 * returned NFS4ERR_DELAY as per Section 2.10.6.2
648 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
653 case -NFS4ERR_BADSLOT:
655 * The slot id we used was probably retired. Try again
656 * using a different slot id.
659 case -NFS4ERR_SEQ_MISORDERED:
661 * Was the last operation on this sequence interrupted?
662 * If so, retry after bumping the sequence number.
669 * Could this slot have been previously retired?
670 * If so, then the server may be expecting seq_nr = 1!
672 if (slot->seq_nr != 1) {
677 case -NFS4ERR_SEQ_FALSE_RETRY:
681 /* Just update the slot sequence no. */
685 /* The session may be reset by one of the error handlers. */
686 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
687 nfs41_sequence_free_slot(res);
691 if (rpc_restart_call_prepare(task)) {
697 if (!rpc_restart_call(task))
699 rpc_delay(task, NFS4_POLL_RETRY_MAX);
702 EXPORT_SYMBOL_GPL(nfs41_sequence_done);
704 static int nfs4_sequence_done(struct rpc_task *task,
705 struct nfs4_sequence_res *res)
707 if (res->sr_slot == NULL)
709 if (!res->sr_slot->table->session)
710 return nfs40_sequence_done(task, res);
711 return nfs41_sequence_done(task, res);
714 int nfs41_setup_sequence(struct nfs4_session *session,
715 struct nfs4_sequence_args *args,
716 struct nfs4_sequence_res *res,
717 struct rpc_task *task)
719 struct nfs4_slot *slot;
720 struct nfs4_slot_table *tbl;
722 dprintk("--> %s\n", __func__);
723 /* slot already allocated? */
724 if (res->sr_slot != NULL)
727 tbl = &session->fc_slot_table;
729 task->tk_timeout = 0;
731 spin_lock(&tbl->slot_tbl_lock);
732 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
733 !args->sa_privileged) {
734 /* The state manager will wait until the slot table is empty */
735 dprintk("%s session is draining\n", __func__);
739 slot = nfs4_alloc_slot(tbl);
741 /* If out of memory, try again in 1/4 second */
742 if (slot == ERR_PTR(-ENOMEM))
743 task->tk_timeout = HZ >> 2;
744 dprintk("<-- %s: no free slots\n", __func__);
747 spin_unlock(&tbl->slot_tbl_lock);
749 args->sa_slot = slot;
751 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
752 slot->slot_nr, slot->seq_nr);
755 res->sr_timestamp = jiffies;
756 res->sr_status_flags = 0;
758 * sr_status is only set in decode_sequence, and so will remain
759 * set to 1 if an rpc level failure occurs.
762 trace_nfs4_setup_sequence(session, args);
764 rpc_call_start(task);
767 /* Privileged tasks are queued with top priority */
768 if (args->sa_privileged)
769 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
770 NULL, RPC_PRIORITY_PRIVILEGED);
772 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
773 spin_unlock(&tbl->slot_tbl_lock);
776 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
778 static int nfs4_setup_sequence(const struct nfs_server *server,
779 struct nfs4_sequence_args *args,
780 struct nfs4_sequence_res *res,
781 struct rpc_task *task)
783 struct nfs4_session *session = nfs4_get_session(server);
787 return nfs40_setup_sequence(server, args, res, task);
789 dprintk("--> %s clp %p session %p sr_slot %u\n",
790 __func__, session->clp, session, res->sr_slot ?
791 res->sr_slot->slot_nr : NFS4_NO_SLOT);
793 ret = nfs41_setup_sequence(session, args, res, task);
795 dprintk("<-- %s status=%d\n", __func__, ret);
799 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
801 struct nfs4_call_sync_data *data = calldata;
802 struct nfs4_session *session = nfs4_get_session(data->seq_server);
804 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
806 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
809 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
811 struct nfs4_call_sync_data *data = calldata;
813 nfs41_sequence_done(task, data->seq_res);
816 static const struct rpc_call_ops nfs41_call_sync_ops = {
817 .rpc_call_prepare = nfs41_call_sync_prepare,
818 .rpc_call_done = nfs41_call_sync_done,
821 #else /* !CONFIG_NFS_V4_1 */
823 static int nfs4_setup_sequence(const struct nfs_server *server,
824 struct nfs4_sequence_args *args,
825 struct nfs4_sequence_res *res,
826 struct rpc_task *task)
828 return nfs40_setup_sequence(server, args, res, task);
831 static int nfs4_sequence_done(struct rpc_task *task,
832 struct nfs4_sequence_res *res)
834 return nfs40_sequence_done(task, res);
837 #endif /* !CONFIG_NFS_V4_1 */
839 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
841 struct nfs4_call_sync_data *data = calldata;
842 nfs4_setup_sequence(data->seq_server,
843 data->seq_args, data->seq_res, task);
846 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
848 struct nfs4_call_sync_data *data = calldata;
849 nfs4_sequence_done(task, data->seq_res);
852 static const struct rpc_call_ops nfs40_call_sync_ops = {
853 .rpc_call_prepare = nfs40_call_sync_prepare,
854 .rpc_call_done = nfs40_call_sync_done,
857 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
858 struct nfs_server *server,
859 struct rpc_message *msg,
860 struct nfs4_sequence_args *args,
861 struct nfs4_sequence_res *res)
864 struct rpc_task *task;
865 struct nfs_client *clp = server->nfs_client;
866 struct nfs4_call_sync_data data = {
867 .seq_server = server,
871 struct rpc_task_setup task_setup = {
874 .callback_ops = clp->cl_mvops->call_sync_ops,
875 .callback_data = &data
878 task = rpc_run_task(&task_setup);
882 ret = task->tk_status;
889 int nfs4_call_sync(struct rpc_clnt *clnt,
890 struct nfs_server *server,
891 struct rpc_message *msg,
892 struct nfs4_sequence_args *args,
893 struct nfs4_sequence_res *res,
896 nfs4_init_sequence(args, res, cache_reply);
897 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
900 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
902 struct nfs_inode *nfsi = NFS_I(dir);
904 spin_lock(&dir->i_lock);
905 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
906 if (!cinfo->atomic || cinfo->before != dir->i_version)
907 nfs_force_lookup_revalidate(dir);
908 dir->i_version = cinfo->after;
909 nfs_fscache_invalidate(dir);
910 spin_unlock(&dir->i_lock);
913 struct nfs4_opendata {
915 struct nfs_openargs o_arg;
916 struct nfs_openres o_res;
917 struct nfs_open_confirmargs c_arg;
918 struct nfs_open_confirmres c_res;
919 struct nfs4_string owner_name;
920 struct nfs4_string group_name;
921 struct nfs_fattr f_attr;
922 struct nfs4_label *f_label;
924 struct dentry *dentry;
925 struct nfs4_state_owner *owner;
926 struct nfs4_state *state;
928 unsigned long timestamp;
929 unsigned int rpc_done : 1;
930 unsigned int file_created : 1;
931 unsigned int is_recover : 1;
936 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
937 int err, struct nfs4_exception *exception)
941 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
943 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
944 exception->retry = 1;
948 static enum open_claim_type4
949 nfs4_map_atomic_open_claim(struct nfs_server *server,
950 enum open_claim_type4 claim)
952 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
957 case NFS4_OPEN_CLAIM_FH:
958 return NFS4_OPEN_CLAIM_NULL;
959 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
960 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
961 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
962 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
966 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
968 p->o_res.f_attr = &p->f_attr;
969 p->o_res.f_label = p->f_label;
970 p->o_res.seqid = p->o_arg.seqid;
971 p->c_res.seqid = p->c_arg.seqid;
972 p->o_res.server = p->o_arg.server;
973 p->o_res.access_request = p->o_arg.access;
974 nfs_fattr_init(&p->f_attr);
975 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
978 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
979 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
980 const struct iattr *attrs,
981 struct nfs4_label *label,
982 enum open_claim_type4 claim,
985 struct dentry *parent = dget_parent(dentry);
986 struct inode *dir = parent->d_inode;
987 struct nfs_server *server = NFS_SERVER(dir);
988 struct nfs4_opendata *p;
990 p = kzalloc(sizeof(*p), gfp_mask);
994 p->f_label = nfs4_label_alloc(server, gfp_mask);
995 if (IS_ERR(p->f_label))
998 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
999 if (p->o_arg.seqid == NULL)
1000 goto err_free_label;
1001 nfs_sb_active(dentry->d_sb);
1002 p->dentry = dget(dentry);
1005 atomic_inc(&sp->so_count);
1006 p->o_arg.open_flags = flags;
1007 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
1008 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1009 * will return permission denied for all bits until close */
1010 if (!(flags & O_EXCL)) {
1011 /* ask server to check for all possible rights as results
1013 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1014 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
1016 p->o_arg.clientid = server->nfs_client->cl_clientid;
1017 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1018 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
1019 p->o_arg.name = &dentry->d_name;
1020 p->o_arg.server = server;
1021 p->o_arg.bitmask = nfs4_bitmask(server, label);
1022 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1023 p->o_arg.label = label;
1024 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1025 switch (p->o_arg.claim) {
1026 case NFS4_OPEN_CLAIM_NULL:
1027 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1028 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1029 p->o_arg.fh = NFS_FH(dir);
1031 case NFS4_OPEN_CLAIM_PREVIOUS:
1032 case NFS4_OPEN_CLAIM_FH:
1033 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1034 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1035 p->o_arg.fh = NFS_FH(dentry->d_inode);
1037 if (attrs != NULL && attrs->ia_valid != 0) {
1040 p->o_arg.u.attrs = &p->attrs;
1041 memcpy(&p->attrs, attrs, sizeof(p->attrs));
1044 verf[1] = current->pid;
1045 memcpy(p->o_arg.u.verifier.data, verf,
1046 sizeof(p->o_arg.u.verifier.data));
1048 p->c_arg.fh = &p->o_res.fh;
1049 p->c_arg.stateid = &p->o_res.stateid;
1050 p->c_arg.seqid = p->o_arg.seqid;
1051 nfs4_init_opendata_res(p);
1052 kref_init(&p->kref);
1056 nfs4_label_free(p->f_label);
1064 static void nfs4_opendata_free(struct kref *kref)
1066 struct nfs4_opendata *p = container_of(kref,
1067 struct nfs4_opendata, kref);
1068 struct super_block *sb = p->dentry->d_sb;
1070 nfs_free_seqid(p->o_arg.seqid);
1071 if (p->state != NULL)
1072 nfs4_put_open_state(p->state);
1073 nfs4_put_state_owner(p->owner);
1075 nfs4_label_free(p->f_label);
1079 nfs_sb_deactive(sb);
1080 nfs_fattr_free_names(&p->f_attr);
1081 kfree(p->f_attr.mdsthreshold);
1085 static void nfs4_opendata_put(struct nfs4_opendata *p)
1088 kref_put(&p->kref, nfs4_opendata_free);
1091 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1095 ret = rpc_wait_for_completion_task(task);
1099 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
1103 if (open_mode & (O_EXCL|O_TRUNC))
1105 switch (mode & (FMODE_READ|FMODE_WRITE)) {
1107 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1108 && state->n_rdonly != 0;
1111 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1112 && state->n_wronly != 0;
1114 case FMODE_READ|FMODE_WRITE:
1115 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1116 && state->n_rdwr != 0;
1122 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
1124 if (delegation == NULL)
1126 if ((delegation->type & fmode) != fmode)
1128 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1130 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1132 nfs_mark_delegation_referenced(delegation);
1136 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
1145 case FMODE_READ|FMODE_WRITE:
1148 nfs4_state_set_mode_locked(state, state->state | fmode);
1151 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1153 struct nfs_client *clp = state->owner->so_server->nfs_client;
1154 bool need_recover = false;
1156 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1157 need_recover = true;
1158 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1159 need_recover = true;
1160 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1161 need_recover = true;
1163 nfs4_state_mark_reclaim_nograce(clp, state);
1166 static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1167 nfs4_stateid *stateid)
1169 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1171 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1172 nfs_test_and_clear_all_open_stateid(state);
1175 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1180 static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1181 nfs4_stateid *stateid, fmode_t fmode)
1183 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1184 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1186 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1189 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1192 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1193 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1194 clear_bit(NFS_OPEN_STATE, &state->flags);
1196 if (stateid == NULL)
1198 if (!nfs_need_update_open_stateid(state, stateid))
1200 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1201 nfs4_stateid_copy(&state->stateid, stateid);
1202 nfs4_stateid_copy(&state->open_stateid, stateid);
1205 static void nfs_clear_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1207 write_seqlock(&state->seqlock);
1208 nfs_clear_open_stateid_locked(state, stateid, fmode);
1209 write_sequnlock(&state->seqlock);
1210 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1211 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1214 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1218 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1221 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1223 case FMODE_READ|FMODE_WRITE:
1224 set_bit(NFS_O_RDWR_STATE, &state->flags);
1226 if (!nfs_need_update_open_stateid(state, stateid))
1228 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1229 nfs4_stateid_copy(&state->stateid, stateid);
1230 nfs4_stateid_copy(&state->open_stateid, stateid);
1233 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1236 * Protect the call to nfs4_state_set_mode_locked and
1237 * serialise the stateid update
1239 write_seqlock(&state->seqlock);
1240 if (deleg_stateid != NULL) {
1241 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1242 set_bit(NFS_DELEGATED_STATE, &state->flags);
1244 if (open_stateid != NULL)
1245 nfs_set_open_stateid_locked(state, open_stateid, fmode);
1246 write_sequnlock(&state->seqlock);
1247 spin_lock(&state->owner->so_lock);
1248 update_open_stateflags(state, fmode);
1249 spin_unlock(&state->owner->so_lock);
1252 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
1254 struct nfs_inode *nfsi = NFS_I(state->inode);
1255 struct nfs_delegation *deleg_cur;
1258 fmode &= (FMODE_READ|FMODE_WRITE);
1261 deleg_cur = rcu_dereference(nfsi->delegation);
1262 if (deleg_cur == NULL)
1265 spin_lock(&deleg_cur->lock);
1266 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
1267 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
1268 (deleg_cur->type & fmode) != fmode)
1269 goto no_delegation_unlock;
1271 if (delegation == NULL)
1272 delegation = &deleg_cur->stateid;
1273 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1274 goto no_delegation_unlock;
1276 nfs_mark_delegation_referenced(deleg_cur);
1277 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1279 no_delegation_unlock:
1280 spin_unlock(&deleg_cur->lock);
1284 if (!ret && open_stateid != NULL) {
1285 __update_open_stateid(state, open_stateid, NULL, fmode);
1288 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1289 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1295 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1297 struct nfs_delegation *delegation;
1300 delegation = rcu_dereference(NFS_I(inode)->delegation);
1301 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1306 nfs4_inode_return_delegation(inode);
1309 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1311 struct nfs4_state *state = opendata->state;
1312 struct nfs_inode *nfsi = NFS_I(state->inode);
1313 struct nfs_delegation *delegation;
1314 int open_mode = opendata->o_arg.open_flags;
1315 fmode_t fmode = opendata->o_arg.fmode;
1316 nfs4_stateid stateid;
1320 spin_lock(&state->owner->so_lock);
1321 if (can_open_cached(state, fmode, open_mode)) {
1322 update_open_stateflags(state, fmode);
1323 spin_unlock(&state->owner->so_lock);
1324 goto out_return_state;
1326 spin_unlock(&state->owner->so_lock);
1328 delegation = rcu_dereference(nfsi->delegation);
1329 if (!can_open_delegated(delegation, fmode)) {
1333 /* Save the delegation */
1334 nfs4_stateid_copy(&stateid, &delegation->stateid);
1336 nfs_release_seqid(opendata->o_arg.seqid);
1337 if (!opendata->is_recover) {
1338 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1344 /* Try to update the stateid using the delegation */
1345 if (update_open_stateid(state, NULL, &stateid, fmode))
1346 goto out_return_state;
1349 return ERR_PTR(ret);
1351 atomic_inc(&state->count);
1356 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1358 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1359 struct nfs_delegation *delegation;
1360 int delegation_flags = 0;
1363 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1365 delegation_flags = delegation->flags;
1367 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1368 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1369 "returning a delegation for "
1370 "OPEN(CLAIM_DELEGATE_CUR)\n",
1372 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1373 nfs_inode_set_delegation(state->inode,
1374 data->owner->so_cred,
1377 nfs_inode_reclaim_delegation(state->inode,
1378 data->owner->so_cred,
1383 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1384 * and update the nfs4_state.
1386 static struct nfs4_state *
1387 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1389 struct inode *inode = data->state->inode;
1390 struct nfs4_state *state = data->state;
1393 if (!data->rpc_done) {
1394 if (data->rpc_status) {
1395 ret = data->rpc_status;
1398 /* cached opens have already been processed */
1402 ret = nfs_refresh_inode(inode, &data->f_attr);
1406 if (data->o_res.delegation_type != 0)
1407 nfs4_opendata_check_deleg(data, state);
1409 update_open_stateid(state, &data->o_res.stateid, NULL,
1411 atomic_inc(&state->count);
1415 return ERR_PTR(ret);
1419 static struct nfs4_state *
1420 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1422 struct inode *inode;
1423 struct nfs4_state *state = NULL;
1426 if (!data->rpc_done) {
1427 state = nfs4_try_open_cached(data);
1432 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1434 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1435 ret = PTR_ERR(inode);
1439 state = nfs4_get_open_state(inode, data->owner);
1442 if (data->o_res.delegation_type != 0)
1443 nfs4_opendata_check_deleg(data, state);
1444 update_open_stateid(state, &data->o_res.stateid, NULL,
1448 nfs_release_seqid(data->o_arg.seqid);
1453 return ERR_PTR(ret);
1456 static struct nfs4_state *
1457 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1459 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1460 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1461 return _nfs4_opendata_to_nfs4_state(data);
1464 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1466 struct nfs_inode *nfsi = NFS_I(state->inode);
1467 struct nfs_open_context *ctx;
1469 spin_lock(&state->inode->i_lock);
1470 list_for_each_entry(ctx, &nfsi->open_files, list) {
1471 if (ctx->state != state)
1473 get_nfs_open_context(ctx);
1474 spin_unlock(&state->inode->i_lock);
1477 spin_unlock(&state->inode->i_lock);
1478 return ERR_PTR(-ENOENT);
1481 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1482 struct nfs4_state *state, enum open_claim_type4 claim)
1484 struct nfs4_opendata *opendata;
1486 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1487 NULL, NULL, claim, GFP_NOFS);
1488 if (opendata == NULL)
1489 return ERR_PTR(-ENOMEM);
1490 opendata->state = state;
1491 atomic_inc(&state->count);
1495 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1497 struct nfs4_state *newstate;
1500 opendata->o_arg.open_flags = 0;
1501 opendata->o_arg.fmode = fmode;
1502 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1503 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1504 nfs4_init_opendata_res(opendata);
1505 ret = _nfs4_recover_proc_open(opendata);
1508 newstate = nfs4_opendata_to_nfs4_state(opendata);
1509 if (IS_ERR(newstate))
1510 return PTR_ERR(newstate);
1511 nfs4_close_state(newstate, fmode);
1516 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1518 struct nfs4_state *newstate;
1521 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1522 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1523 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1524 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1525 /* memory barrier prior to reading state->n_* */
1526 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1527 clear_bit(NFS_OPEN_STATE, &state->flags);
1529 if (state->n_rdwr != 0) {
1530 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1533 if (newstate != state)
1536 if (state->n_wronly != 0) {
1537 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1540 if (newstate != state)
1543 if (state->n_rdonly != 0) {
1544 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1547 if (newstate != state)
1551 * We may have performed cached opens for all three recoveries.
1552 * Check if we need to update the current stateid.
1554 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1555 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1556 write_seqlock(&state->seqlock);
1557 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1558 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1559 write_sequnlock(&state->seqlock);
1566 * reclaim state on the server after a reboot.
1568 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1570 struct nfs_delegation *delegation;
1571 struct nfs4_opendata *opendata;
1572 fmode_t delegation_type = 0;
1575 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1576 NFS4_OPEN_CLAIM_PREVIOUS);
1577 if (IS_ERR(opendata))
1578 return PTR_ERR(opendata);
1580 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1581 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1582 delegation_type = delegation->type;
1584 opendata->o_arg.u.delegation_type = delegation_type;
1585 status = nfs4_open_recover(opendata, state);
1586 nfs4_opendata_put(opendata);
1590 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1592 struct nfs_server *server = NFS_SERVER(state->inode);
1593 struct nfs4_exception exception = { };
1596 err = _nfs4_do_open_reclaim(ctx, state);
1597 trace_nfs4_open_reclaim(ctx, 0, err);
1598 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1600 if (err != -NFS4ERR_DELAY)
1602 nfs4_handle_exception(server, err, &exception);
1603 } while (exception.retry);
1607 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1609 struct nfs_open_context *ctx;
1612 ctx = nfs4_state_find_open_context(state);
1615 ret = nfs4_do_open_reclaim(ctx, state);
1616 put_nfs_open_context(ctx);
1620 static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1624 printk(KERN_ERR "NFS: %s: unhandled error "
1625 "%d.\n", __func__, err);
1630 case -NFS4ERR_BADSESSION:
1631 case -NFS4ERR_BADSLOT:
1632 case -NFS4ERR_BAD_HIGH_SLOT:
1633 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1634 case -NFS4ERR_DEADSESSION:
1635 set_bit(NFS_DELEGATED_STATE, &state->flags);
1636 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1638 case -NFS4ERR_STALE_CLIENTID:
1639 case -NFS4ERR_STALE_STATEID:
1640 set_bit(NFS_DELEGATED_STATE, &state->flags);
1641 case -NFS4ERR_EXPIRED:
1642 /* Don't recall a delegation if it was lost */
1643 nfs4_schedule_lease_recovery(server->nfs_client);
1645 case -NFS4ERR_MOVED:
1646 nfs4_schedule_migration_recovery(server);
1648 case -NFS4ERR_LEASE_MOVED:
1649 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1651 case -NFS4ERR_DELEG_REVOKED:
1652 case -NFS4ERR_ADMIN_REVOKED:
1653 case -NFS4ERR_BAD_STATEID:
1654 case -NFS4ERR_OPENMODE:
1655 nfs_inode_find_state_and_recover(state->inode,
1657 nfs4_schedule_stateid_recovery(server, state);
1659 case -NFS4ERR_DELAY:
1660 case -NFS4ERR_GRACE:
1661 set_bit(NFS_DELEGATED_STATE, &state->flags);
1665 case -NFS4ERR_DENIED:
1666 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1672 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1674 struct nfs_server *server = NFS_SERVER(state->inode);
1675 struct nfs4_opendata *opendata;
1678 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1679 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1680 if (IS_ERR(opendata))
1681 return PTR_ERR(opendata);
1682 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1683 err = nfs4_open_recover(opendata, state);
1684 nfs4_opendata_put(opendata);
1685 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1688 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1690 struct nfs4_opendata *data = calldata;
1692 nfs40_setup_sequence(data->o_arg.server, &data->c_arg.seq_args,
1693 &data->c_res.seq_res, task);
1696 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1698 struct nfs4_opendata *data = calldata;
1700 nfs40_sequence_done(task, &data->c_res.seq_res);
1702 data->rpc_status = task->tk_status;
1703 if (data->rpc_status == 0) {
1704 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1705 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1706 renew_lease(data->o_res.server, data->timestamp);
1711 static void nfs4_open_confirm_release(void *calldata)
1713 struct nfs4_opendata *data = calldata;
1714 struct nfs4_state *state = NULL;
1716 /* If this request hasn't been cancelled, do nothing */
1717 if (data->cancelled == 0)
1719 /* In case of error, no cleanup! */
1720 if (!data->rpc_done)
1722 state = nfs4_opendata_to_nfs4_state(data);
1724 nfs4_close_state(state, data->o_arg.fmode);
1726 nfs4_opendata_put(data);
1729 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1730 .rpc_call_prepare = nfs4_open_confirm_prepare,
1731 .rpc_call_done = nfs4_open_confirm_done,
1732 .rpc_release = nfs4_open_confirm_release,
1736 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1738 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1740 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1741 struct rpc_task *task;
1742 struct rpc_message msg = {
1743 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1744 .rpc_argp = &data->c_arg,
1745 .rpc_resp = &data->c_res,
1746 .rpc_cred = data->owner->so_cred,
1748 struct rpc_task_setup task_setup_data = {
1749 .rpc_client = server->client,
1750 .rpc_message = &msg,
1751 .callback_ops = &nfs4_open_confirm_ops,
1752 .callback_data = data,
1753 .workqueue = nfsiod_workqueue,
1754 .flags = RPC_TASK_ASYNC,
1758 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
1759 kref_get(&data->kref);
1761 data->rpc_status = 0;
1762 data->timestamp = jiffies;
1763 task = rpc_run_task(&task_setup_data);
1765 return PTR_ERR(task);
1766 status = nfs4_wait_for_completion_rpc_task(task);
1768 data->cancelled = 1;
1771 status = data->rpc_status;
1776 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1778 struct nfs4_opendata *data = calldata;
1779 struct nfs4_state_owner *sp = data->owner;
1780 struct nfs_client *clp = sp->so_server->nfs_client;
1782 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1785 * Check if we still need to send an OPEN call, or if we can use
1786 * a delegation instead.
1788 if (data->state != NULL) {
1789 struct nfs_delegation *delegation;
1791 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1794 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1795 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1796 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
1797 can_open_delegated(delegation, data->o_arg.fmode))
1798 goto unlock_no_action;
1801 /* Update client id. */
1802 data->o_arg.clientid = clp->cl_clientid;
1803 switch (data->o_arg.claim) {
1804 case NFS4_OPEN_CLAIM_PREVIOUS:
1805 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1806 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1807 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
1808 case NFS4_OPEN_CLAIM_FH:
1809 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1810 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1812 data->timestamp = jiffies;
1813 if (nfs4_setup_sequence(data->o_arg.server,
1814 &data->o_arg.seq_args,
1815 &data->o_res.seq_res,
1817 nfs_release_seqid(data->o_arg.seqid);
1819 /* Set the create mode (note dependency on the session type) */
1820 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1821 if (data->o_arg.open_flags & O_EXCL) {
1822 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1823 if (nfs4_has_persistent_session(clp))
1824 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1825 else if (clp->cl_mvops->minor_version > 0)
1826 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1832 task->tk_action = NULL;
1834 nfs4_sequence_done(task, &data->o_res.seq_res);
1837 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1839 struct nfs4_opendata *data = calldata;
1841 data->rpc_status = task->tk_status;
1843 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1846 if (task->tk_status == 0) {
1847 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1848 switch (data->o_res.f_attr->mode & S_IFMT) {
1852 data->rpc_status = -ELOOP;
1855 data->rpc_status = -EISDIR;
1858 data->rpc_status = -ENOTDIR;
1861 renew_lease(data->o_res.server, data->timestamp);
1862 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1863 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1868 static void nfs4_open_release(void *calldata)
1870 struct nfs4_opendata *data = calldata;
1871 struct nfs4_state *state = NULL;
1873 /* If this request hasn't been cancelled, do nothing */
1874 if (data->cancelled == 0)
1876 /* In case of error, no cleanup! */
1877 if (data->rpc_status != 0 || !data->rpc_done)
1879 /* In case we need an open_confirm, no cleanup! */
1880 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1882 state = nfs4_opendata_to_nfs4_state(data);
1884 nfs4_close_state(state, data->o_arg.fmode);
1886 nfs4_opendata_put(data);
1889 static const struct rpc_call_ops nfs4_open_ops = {
1890 .rpc_call_prepare = nfs4_open_prepare,
1891 .rpc_call_done = nfs4_open_done,
1892 .rpc_release = nfs4_open_release,
1895 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1897 struct inode *dir = data->dir->d_inode;
1898 struct nfs_server *server = NFS_SERVER(dir);
1899 struct nfs_openargs *o_arg = &data->o_arg;
1900 struct nfs_openres *o_res = &data->o_res;
1901 struct rpc_task *task;
1902 struct rpc_message msg = {
1903 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1906 .rpc_cred = data->owner->so_cred,
1908 struct rpc_task_setup task_setup_data = {
1909 .rpc_client = server->client,
1910 .rpc_message = &msg,
1911 .callback_ops = &nfs4_open_ops,
1912 .callback_data = data,
1913 .workqueue = nfsiod_workqueue,
1914 .flags = RPC_TASK_ASYNC,
1918 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1919 kref_get(&data->kref);
1921 data->rpc_status = 0;
1922 data->cancelled = 0;
1923 data->is_recover = 0;
1925 nfs4_set_sequence_privileged(&o_arg->seq_args);
1926 data->is_recover = 1;
1928 task = rpc_run_task(&task_setup_data);
1930 return PTR_ERR(task);
1931 status = nfs4_wait_for_completion_rpc_task(task);
1933 data->cancelled = 1;
1936 status = data->rpc_status;
1942 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1944 struct inode *dir = data->dir->d_inode;
1945 struct nfs_openres *o_res = &data->o_res;
1948 status = nfs4_run_open_task(data, 1);
1949 if (status != 0 || !data->rpc_done)
1952 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1954 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1955 status = _nfs4_proc_open_confirm(data);
1964 * Additional permission checks in order to distinguish between an
1965 * open for read, and an open for execute. This works around the
1966 * fact that NFSv4 OPEN treats read and execute permissions as being
1968 * Note that in the non-execute case, we want to turn off permission
1969 * checking if we just created a new file (POSIX open() semantics).
1971 static int nfs4_opendata_access(struct rpc_cred *cred,
1972 struct nfs4_opendata *opendata,
1973 struct nfs4_state *state, fmode_t fmode,
1976 struct nfs_access_entry cache;
1979 /* access call failed or for some reason the server doesn't
1980 * support any access modes -- defer access call until later */
1981 if (opendata->o_res.access_supported == 0)
1986 * Use openflags to check for exec, because fmode won't
1987 * always have FMODE_EXEC set when file open for exec.
1989 if (openflags & __FMODE_EXEC) {
1990 /* ONLY check for exec rights */
1992 } else if ((fmode & FMODE_READ) && !opendata->file_created)
1996 cache.jiffies = jiffies;
1997 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1998 nfs_access_add_cache(state->inode, &cache);
2000 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
2003 /* even though OPEN succeeded, access is denied. Close the file */
2004 nfs4_close_state(state, fmode);
2009 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2011 static int _nfs4_proc_open(struct nfs4_opendata *data)
2013 struct inode *dir = data->dir->d_inode;
2014 struct nfs_server *server = NFS_SERVER(dir);
2015 struct nfs_openargs *o_arg = &data->o_arg;
2016 struct nfs_openres *o_res = &data->o_res;
2019 status = nfs4_run_open_task(data, 0);
2020 if (!data->rpc_done)
2023 if (status == -NFS4ERR_BADNAME &&
2024 !(o_arg->open_flags & O_CREAT))
2029 nfs_fattr_map_and_free_names(server, &data->f_attr);
2031 if (o_arg->open_flags & O_CREAT) {
2032 update_changeattr(dir, &o_res->cinfo);
2033 if (o_arg->open_flags & O_EXCL)
2034 data->file_created = 1;
2035 else if (o_res->cinfo.before != o_res->cinfo.after)
2036 data->file_created = 1;
2038 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2039 server->caps &= ~NFS_CAP_POSIX_LOCK;
2040 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2041 status = _nfs4_proc_open_confirm(data);
2045 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
2046 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
2050 static int nfs4_recover_expired_lease(struct nfs_server *server)
2052 return nfs4_client_recover_expired_lease(server->nfs_client);
2057 * reclaim state on the server after a network partition.
2058 * Assumes caller holds the appropriate lock
2060 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2062 struct nfs4_opendata *opendata;
2065 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2066 NFS4_OPEN_CLAIM_FH);
2067 if (IS_ERR(opendata))
2068 return PTR_ERR(opendata);
2069 ret = nfs4_open_recover(opendata, state);
2071 d_drop(ctx->dentry);
2072 nfs4_opendata_put(opendata);
2076 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2078 struct nfs_server *server = NFS_SERVER(state->inode);
2079 struct nfs4_exception exception = { };
2083 err = _nfs4_open_expired(ctx, state);
2084 trace_nfs4_open_expired(ctx, 0, err);
2085 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2090 case -NFS4ERR_GRACE:
2091 case -NFS4ERR_DELAY:
2092 nfs4_handle_exception(server, err, &exception);
2095 } while (exception.retry);
2100 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2102 struct nfs_open_context *ctx;
2105 ctx = nfs4_state_find_open_context(state);
2108 ret = nfs4_do_open_expired(ctx, state);
2109 put_nfs_open_context(ctx);
2113 #if defined(CONFIG_NFS_V4_1)
2114 static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
2116 struct nfs_server *server = NFS_SERVER(state->inode);
2117 nfs4_stateid *stateid = &state->stateid;
2118 struct nfs_delegation *delegation;
2119 struct rpc_cred *cred = NULL;
2120 int status = -NFS4ERR_BAD_STATEID;
2122 /* If a state reset has been done, test_stateid is unneeded */
2123 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
2126 /* Get the delegation credential for use by test/free_stateid */
2128 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2129 if (delegation != NULL &&
2130 nfs4_stateid_match(&delegation->stateid, stateid)) {
2131 cred = get_rpccred(delegation->cred);
2133 status = nfs41_test_stateid(server, stateid, cred);
2134 trace_nfs4_test_delegation_stateid(state, NULL, status);
2138 if (status != NFS_OK) {
2139 /* Free the stateid unless the server explicitly
2140 * informs us the stateid is unrecognized. */
2141 if (status != -NFS4ERR_BAD_STATEID)
2142 nfs41_free_stateid(server, stateid, cred);
2143 nfs_remove_bad_delegation(state->inode);
2145 write_seqlock(&state->seqlock);
2146 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2147 write_sequnlock(&state->seqlock);
2148 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2156 * nfs41_check_open_stateid - possibly free an open stateid
2158 * @state: NFSv4 state for an inode
2160 * Returns NFS_OK if recovery for this stateid is now finished.
2161 * Otherwise a negative NFS4ERR value is returned.
2163 static int nfs41_check_open_stateid(struct nfs4_state *state)
2165 struct nfs_server *server = NFS_SERVER(state->inode);
2166 nfs4_stateid *stateid = &state->open_stateid;
2167 struct rpc_cred *cred = state->owner->so_cred;
2170 /* If a state reset has been done, test_stateid is unneeded */
2171 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2172 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2173 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2174 return -NFS4ERR_BAD_STATEID;
2176 status = nfs41_test_stateid(server, stateid, cred);
2177 trace_nfs4_test_open_stateid(state, NULL, status);
2178 if (status != NFS_OK) {
2179 /* Free the stateid unless the server explicitly
2180 * informs us the stateid is unrecognized. */
2181 if (status != -NFS4ERR_BAD_STATEID)
2182 nfs41_free_stateid(server, stateid, cred);
2184 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2185 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2186 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2187 clear_bit(NFS_OPEN_STATE, &state->flags);
2192 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2196 nfs41_clear_delegation_stateid(state);
2197 status = nfs41_check_open_stateid(state);
2198 if (status != NFS_OK)
2199 status = nfs4_open_expired(sp, state);
2205 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2206 * fields corresponding to attributes that were used to store the verifier.
2207 * Make sure we clobber those fields in the later setattr call
2209 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2211 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2212 !(sattr->ia_valid & ATTR_ATIME_SET))
2213 sattr->ia_valid |= ATTR_ATIME;
2215 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2216 !(sattr->ia_valid & ATTR_MTIME_SET))
2217 sattr->ia_valid |= ATTR_MTIME;
2220 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2223 struct nfs_open_context *ctx)
2225 struct nfs4_state_owner *sp = opendata->owner;
2226 struct nfs_server *server = sp->so_server;
2227 struct dentry *dentry;
2228 struct nfs4_state *state;
2232 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2234 ret = _nfs4_proc_open(opendata);
2236 if (ret == -ENOENT) {
2237 dentry = opendata->dentry;
2238 if (dentry->d_inode)
2240 else if (d_unhashed(dentry))
2241 d_add(dentry, NULL);
2243 nfs_set_verifier(dentry,
2244 nfs_save_change_attribute(opendata->dir->d_inode));
2249 state = nfs4_opendata_to_nfs4_state(opendata);
2250 ret = PTR_ERR(state);
2253 if (server->caps & NFS_CAP_POSIX_LOCK)
2254 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2256 dentry = opendata->dentry;
2257 if (dentry->d_inode == NULL) {
2258 /* FIXME: Is this d_drop() ever needed? */
2260 dentry = d_add_unique(dentry, igrab(state->inode));
2261 if (dentry == NULL) {
2262 dentry = opendata->dentry;
2263 } else if (dentry != ctx->dentry) {
2265 ctx->dentry = dget(dentry);
2267 nfs_set_verifier(dentry,
2268 nfs_save_change_attribute(opendata->dir->d_inode));
2271 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2276 if (dentry->d_inode == state->inode) {
2277 nfs_inode_attach_open_context(ctx);
2278 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2279 nfs4_schedule_stateid_recovery(server, state);
2286 * Returns a referenced nfs4_state
2288 static int _nfs4_do_open(struct inode *dir,
2289 struct nfs_open_context *ctx,
2291 struct iattr *sattr,
2292 struct nfs4_label *label,
2295 struct nfs4_state_owner *sp;
2296 struct nfs4_state *state = NULL;
2297 struct nfs_server *server = NFS_SERVER(dir);
2298 struct nfs4_opendata *opendata;
2299 struct dentry *dentry = ctx->dentry;
2300 struct rpc_cred *cred = ctx->cred;
2301 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2302 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
2303 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
2304 struct nfs4_label *olabel = NULL;
2307 /* Protect against reboot recovery conflicts */
2309 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2311 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2314 status = nfs4_recover_expired_lease(server);
2316 goto err_put_state_owner;
2317 if (dentry->d_inode != NULL)
2318 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
2320 if (dentry->d_inode)
2321 claim = NFS4_OPEN_CLAIM_FH;
2322 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
2323 label, claim, GFP_KERNEL);
2324 if (opendata == NULL)
2325 goto err_put_state_owner;
2328 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2329 if (IS_ERR(olabel)) {
2330 status = PTR_ERR(olabel);
2331 goto err_opendata_put;
2335 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2336 if (!opendata->f_attr.mdsthreshold) {
2337 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2338 if (!opendata->f_attr.mdsthreshold)
2339 goto err_free_label;
2341 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
2343 if (dentry->d_inode != NULL)
2344 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
2346 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
2348 goto err_free_label;
2351 if ((opendata->o_arg.open_flags & O_EXCL) &&
2352 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
2353 nfs4_exclusive_attrset(opendata, sattr);
2355 nfs_fattr_init(opendata->o_res.f_attr);
2356 status = nfs4_do_setattr(state->inode, cred,
2357 opendata->o_res.f_attr, sattr,
2358 state, label, olabel);
2360 nfs_setattr_update_inode(state->inode, sattr);
2361 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2362 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2365 if (opendata->file_created)
2366 *opened |= FILE_CREATED;
2368 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
2369 *ctx_th = opendata->f_attr.mdsthreshold;
2370 opendata->f_attr.mdsthreshold = NULL;
2373 nfs4_label_free(olabel);
2375 nfs4_opendata_put(opendata);
2376 nfs4_put_state_owner(sp);
2379 nfs4_label_free(olabel);
2381 nfs4_opendata_put(opendata);
2382 err_put_state_owner:
2383 nfs4_put_state_owner(sp);
2389 static struct nfs4_state *nfs4_do_open(struct inode *dir,
2390 struct nfs_open_context *ctx,
2392 struct iattr *sattr,
2393 struct nfs4_label *label,
2396 struct nfs_server *server = NFS_SERVER(dir);
2397 struct nfs4_exception exception = { };
2398 struct nfs4_state *res;
2402 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
2404 trace_nfs4_open_file(ctx, flags, status);
2407 /* NOTE: BAD_SEQID means the server and client disagree about the
2408 * book-keeping w.r.t. state-changing operations
2409 * (OPEN/CLOSE/LOCK/LOCKU...)
2410 * It is actually a sign of a bug on the client or on the server.
2412 * If we receive a BAD_SEQID error in the particular case of
2413 * doing an OPEN, we assume that nfs_increment_open_seqid() will
2414 * have unhashed the old state_owner for us, and that we can
2415 * therefore safely retry using a new one. We should still warn
2416 * the user though...
2418 if (status == -NFS4ERR_BAD_SEQID) {
2419 pr_warn_ratelimited("NFS: v4 server %s "
2420 " returned a bad sequence-id error!\n",
2421 NFS_SERVER(dir)->nfs_client->cl_hostname);
2422 exception.retry = 1;
2426 * BAD_STATEID on OPEN means that the server cancelled our
2427 * state before it received the OPEN_CONFIRM.
2428 * Recover by retrying the request as per the discussion
2429 * on Page 181 of RFC3530.
2431 if (status == -NFS4ERR_BAD_STATEID) {
2432 exception.retry = 1;
2435 if (status == -EAGAIN) {
2436 /* We must have found a delegation */
2437 exception.retry = 1;
2440 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2442 res = ERR_PTR(nfs4_handle_exception(server,
2443 status, &exception));
2444 } while (exception.retry);
2448 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2449 struct nfs_fattr *fattr, struct iattr *sattr,
2450 struct nfs4_state *state, struct nfs4_label *ilabel,
2451 struct nfs4_label *olabel)
2453 struct nfs_server *server = NFS_SERVER(inode);
2454 struct nfs_setattrargs arg = {
2455 .fh = NFS_FH(inode),
2458 .bitmask = server->attr_bitmask,
2461 struct nfs_setattrres res = {
2466 struct rpc_message msg = {
2467 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2472 unsigned long timestamp = jiffies;
2477 arg.bitmask = nfs4_bitmask(server, ilabel);
2479 arg.bitmask = nfs4_bitmask(server, olabel);
2481 nfs_fattr_init(fattr);
2483 /* Servers should only apply open mode checks for file size changes */
2484 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2485 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2487 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2488 /* Use that stateid */
2489 } else if (truncate && state != NULL) {
2490 struct nfs_lockowner lockowner = {
2491 .l_owner = current->files,
2492 .l_pid = current->tgid,
2494 if (!nfs4_valid_open_stateid(state))
2496 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2497 &lockowner) == -EIO)
2500 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
2502 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2503 if (status == 0 && state != NULL)
2504 renew_lease(server, timestamp);
2508 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2509 struct nfs_fattr *fattr, struct iattr *sattr,
2510 struct nfs4_state *state, struct nfs4_label *ilabel,
2511 struct nfs4_label *olabel)
2513 struct nfs_server *server = NFS_SERVER(inode);
2514 struct nfs4_exception exception = {
2520 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
2521 trace_nfs4_setattr(inode, err);
2523 case -NFS4ERR_OPENMODE:
2524 if (!(sattr->ia_valid & ATTR_SIZE)) {
2525 pr_warn_once("NFSv4: server %s is incorrectly "
2526 "applying open mode checks to "
2527 "a SETATTR that is not "
2528 "changing file size.\n",
2529 server->nfs_client->cl_hostname);
2531 if (state && !(state->state & FMODE_WRITE)) {
2533 if (sattr->ia_valid & ATTR_OPEN)
2538 err = nfs4_handle_exception(server, err, &exception);
2539 } while (exception.retry);
2544 struct nfs4_closedata {
2545 struct inode *inode;
2546 struct nfs4_state *state;
2547 struct nfs_closeargs arg;
2548 struct nfs_closeres res;
2549 struct nfs_fattr fattr;
2550 unsigned long timestamp;
2555 static void nfs4_free_closedata(void *data)
2557 struct nfs4_closedata *calldata = data;
2558 struct nfs4_state_owner *sp = calldata->state->owner;
2559 struct super_block *sb = calldata->state->inode->i_sb;
2562 pnfs_roc_release(calldata->state->inode);
2563 nfs4_put_open_state(calldata->state);
2564 nfs_free_seqid(calldata->arg.seqid);
2565 nfs4_put_state_owner(sp);
2566 nfs_sb_deactive(sb);
2570 static void nfs4_close_done(struct rpc_task *task, void *data)
2572 struct nfs4_closedata *calldata = data;
2573 struct nfs4_state *state = calldata->state;
2574 struct nfs_server *server = NFS_SERVER(calldata->inode);
2575 nfs4_stateid *res_stateid = NULL;
2577 dprintk("%s: begin!\n", __func__);
2578 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2580 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
2581 /* hmm. we are done with the inode, and in the process of freeing
2582 * the state_owner. we keep this around to process errors
2584 switch (task->tk_status) {
2586 res_stateid = &calldata->res.stateid;
2587 if (calldata->arg.fmode == 0 && calldata->roc)
2588 pnfs_roc_set_barrier(state->inode,
2589 calldata->roc_barrier);
2590 renew_lease(server, calldata->timestamp);
2592 case -NFS4ERR_ADMIN_REVOKED:
2593 case -NFS4ERR_STALE_STATEID:
2594 case -NFS4ERR_OLD_STATEID:
2595 case -NFS4ERR_BAD_STATEID:
2596 case -NFS4ERR_EXPIRED:
2597 if (calldata->arg.fmode == 0)
2600 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
2601 rpc_restart_call_prepare(task);
2605 nfs_clear_open_stateid(state, res_stateid, calldata->arg.fmode);
2607 nfs_release_seqid(calldata->arg.seqid);
2608 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2609 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2612 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2614 struct nfs4_closedata *calldata = data;
2615 struct nfs4_state *state = calldata->state;
2616 struct inode *inode = calldata->inode;
2617 bool is_rdonly, is_wronly, is_rdwr;
2620 dprintk("%s: begin!\n", __func__);
2621 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2624 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2625 spin_lock(&state->owner->so_lock);
2626 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2627 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2628 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
2629 /* Calculate the change in open mode */
2630 calldata->arg.fmode = 0;
2631 if (state->n_rdwr == 0) {
2632 if (state->n_rdonly == 0)
2633 call_close |= is_rdonly;
2635 calldata->arg.fmode |= FMODE_READ;
2636 if (state->n_wronly == 0)
2637 call_close |= is_wronly;
2639 calldata->arg.fmode |= FMODE_WRITE;
2641 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2643 if (calldata->arg.fmode == 0)
2644 call_close |= is_rdwr;
2646 if (!nfs4_valid_open_stateid(state))
2648 spin_unlock(&state->owner->so_lock);
2651 /* Note: exit _without_ calling nfs4_close_done */
2655 if (calldata->arg.fmode == 0) {
2656 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2657 if (calldata->roc &&
2658 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2659 nfs_release_seqid(calldata->arg.seqid);
2664 nfs_fattr_init(calldata->res.fattr);
2665 calldata->timestamp = jiffies;
2666 if (nfs4_setup_sequence(NFS_SERVER(inode),
2667 &calldata->arg.seq_args,
2668 &calldata->res.seq_res,
2670 nfs_release_seqid(calldata->arg.seqid);
2671 dprintk("%s: done!\n", __func__);
2674 task->tk_action = NULL;
2676 nfs4_sequence_done(task, &calldata->res.seq_res);
2679 static const struct rpc_call_ops nfs4_close_ops = {
2680 .rpc_call_prepare = nfs4_close_prepare,
2681 .rpc_call_done = nfs4_close_done,
2682 .rpc_release = nfs4_free_closedata,
2685 static bool nfs4_state_has_opener(struct nfs4_state *state)
2687 /* first check existing openers */
2688 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 &&
2689 state->n_rdonly != 0)
2692 if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 &&
2693 state->n_wronly != 0)
2696 if (test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 &&
2703 static bool nfs4_roc(struct inode *inode)
2705 struct nfs_inode *nfsi = NFS_I(inode);
2706 struct nfs_open_context *ctx;
2707 struct nfs4_state *state;
2709 spin_lock(&inode->i_lock);
2710 list_for_each_entry(ctx, &nfsi->open_files, list) {
2714 if (nfs4_state_has_opener(state)) {
2715 spin_unlock(&inode->i_lock);
2719 spin_unlock(&inode->i_lock);
2721 if (nfs4_check_delegation(inode, FMODE_READ))
2724 return pnfs_roc(inode);
2728 * It is possible for data to be read/written from a mem-mapped file
2729 * after the sys_close call (which hits the vfs layer as a flush).
2730 * This means that we can't safely call nfsv4 close on a file until
2731 * the inode is cleared. This in turn means that we are not good
2732 * NFSv4 citizens - we do not indicate to the server to update the file's
2733 * share state even when we are done with one of the three share
2734 * stateid's in the inode.
2736 * NOTE: Caller must be holding the sp->so_owner semaphore!
2738 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
2740 struct nfs_server *server = NFS_SERVER(state->inode);
2741 struct nfs4_closedata *calldata;
2742 struct nfs4_state_owner *sp = state->owner;
2743 struct rpc_task *task;
2744 struct rpc_message msg = {
2745 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2746 .rpc_cred = state->owner->so_cred,
2748 struct rpc_task_setup task_setup_data = {
2749 .rpc_client = server->client,
2750 .rpc_message = &msg,
2751 .callback_ops = &nfs4_close_ops,
2752 .workqueue = nfsiod_workqueue,
2753 .flags = RPC_TASK_ASYNC,
2755 int status = -ENOMEM;
2757 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2758 &task_setup_data.rpc_client, &msg);
2760 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2761 if (calldata == NULL)
2763 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2764 calldata->inode = state->inode;
2765 calldata->state = state;
2766 calldata->arg.fh = NFS_FH(state->inode);
2767 calldata->arg.stateid = &state->open_stateid;
2768 /* Serialization for the sequence id */
2769 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2770 if (calldata->arg.seqid == NULL)
2771 goto out_free_calldata;
2772 calldata->arg.fmode = 0;
2773 calldata->arg.bitmask = server->cache_consistency_bitmask;
2774 calldata->res.fattr = &calldata->fattr;
2775 calldata->res.seqid = calldata->arg.seqid;
2776 calldata->res.server = server;
2777 calldata->roc = nfs4_roc(state->inode);
2778 nfs_sb_active(calldata->inode->i_sb);
2780 msg.rpc_argp = &calldata->arg;
2781 msg.rpc_resp = &calldata->res;
2782 task_setup_data.callback_data = calldata;
2783 task = rpc_run_task(&task_setup_data);
2785 return PTR_ERR(task);
2788 status = rpc_wait_for_completion_task(task);
2794 nfs4_put_open_state(state);
2795 nfs4_put_state_owner(sp);
2799 static struct inode *
2800 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2801 int open_flags, struct iattr *attr, int *opened)
2803 struct nfs4_state *state;
2804 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2806 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
2808 /* Protect against concurrent sillydeletes */
2809 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
2811 nfs4_label_release_security(label);
2814 return ERR_CAST(state);
2815 return state->inode;
2818 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2820 if (ctx->state == NULL)
2823 nfs4_close_sync(ctx->state, ctx->mode);
2825 nfs4_close_state(ctx->state, ctx->mode);
2828 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2829 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
2830 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
2832 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2834 struct nfs4_server_caps_arg args = {
2837 struct nfs4_server_caps_res res = {};
2838 struct rpc_message msg = {
2839 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2845 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2847 /* Sanity check the server answers */
2848 switch (server->nfs_client->cl_minorversion) {
2850 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2851 res.attr_bitmask[2] = 0;
2854 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2857 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2859 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2860 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2861 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2862 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2863 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2864 NFS_CAP_CTIME|NFS_CAP_MTIME|
2865 NFS_CAP_SECURITY_LABEL);
2866 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2867 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2868 server->caps |= NFS_CAP_ACLS;
2869 if (res.has_links != 0)
2870 server->caps |= NFS_CAP_HARDLINKS;
2871 if (res.has_symlinks != 0)
2872 server->caps |= NFS_CAP_SYMLINKS;
2873 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2874 server->caps |= NFS_CAP_FILEID;
2875 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2876 server->caps |= NFS_CAP_MODE;
2877 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2878 server->caps |= NFS_CAP_NLINK;
2879 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2880 server->caps |= NFS_CAP_OWNER;
2881 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2882 server->caps |= NFS_CAP_OWNER_GROUP;
2883 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2884 server->caps |= NFS_CAP_ATIME;
2885 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2886 server->caps |= NFS_CAP_CTIME;
2887 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2888 server->caps |= NFS_CAP_MTIME;
2889 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
2890 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2891 server->caps |= NFS_CAP_SECURITY_LABEL;
2893 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2894 sizeof(server->attr_bitmask));
2895 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2897 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2898 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2899 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2900 server->cache_consistency_bitmask[2] = 0;
2901 server->acl_bitmask = res.acl_bitmask;
2902 server->fh_expire_type = res.fh_expire_type;
2908 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2910 struct nfs4_exception exception = { };
2913 err = nfs4_handle_exception(server,
2914 _nfs4_server_capabilities(server, fhandle),
2916 } while (exception.retry);
2920 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2921 struct nfs_fsinfo *info)
2924 struct nfs4_lookup_root_arg args = {
2927 struct nfs4_lookup_res res = {
2929 .fattr = info->fattr,
2932 struct rpc_message msg = {
2933 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2938 bitmask[0] = nfs4_fattr_bitmap[0];
2939 bitmask[1] = nfs4_fattr_bitmap[1];
2941 * Process the label in the upcoming getfattr
2943 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2945 nfs_fattr_init(info->fattr);
2946 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2949 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2950 struct nfs_fsinfo *info)
2952 struct nfs4_exception exception = { };
2955 err = _nfs4_lookup_root(server, fhandle, info);
2956 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
2959 case -NFS4ERR_WRONGSEC:
2962 err = nfs4_handle_exception(server, err, &exception);
2964 } while (exception.retry);
2969 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2970 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2972 struct rpc_auth_create_args auth_args = {
2973 .pseudoflavor = flavor,
2975 struct rpc_auth *auth;
2978 auth = rpcauth_create(&auth_args, server->client);
2983 ret = nfs4_lookup_root(server, fhandle, info);
2989 * Retry pseudoroot lookup with various security flavors. We do this when:
2991 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2992 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2994 * Returns zero on success, or a negative NFS4ERR value, or a
2995 * negative errno value.
2997 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2998 struct nfs_fsinfo *info)
3000 /* Per 3530bis 15.33.5 */
3001 static const rpc_authflavor_t flav_array[] = {
3005 RPC_AUTH_UNIX, /* courtesy */
3008 int status = -EPERM;
3011 if (server->auth_info.flavor_len > 0) {
3012 /* try each flavor specified by user */
3013 for (i = 0; i < server->auth_info.flavor_len; i++) {
3014 status = nfs4_lookup_root_sec(server, fhandle, info,
3015 server->auth_info.flavors[i]);
3016 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3021 /* no flavors specified by user, try default list */
3022 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3023 status = nfs4_lookup_root_sec(server, fhandle, info,
3025 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3032 * -EACCESS could mean that the user doesn't have correct permissions
3033 * to access the mount. It could also mean that we tried to mount
3034 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3035 * existing mount programs don't handle -EACCES very well so it should
3036 * be mapped to -EPERM instead.
3038 if (status == -EACCES)
3043 static int nfs4_do_find_root_sec(struct nfs_server *server,
3044 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3046 int mv = server->nfs_client->cl_minorversion;
3047 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3051 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3052 * @server: initialized nfs_server handle
3053 * @fhandle: we fill in the pseudo-fs root file handle
3054 * @info: we fill in an FSINFO struct
3055 * @auth_probe: probe the auth flavours
3057 * Returns zero on success, or a negative errno.
3059 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
3060 struct nfs_fsinfo *info,
3065 switch (auth_probe) {
3067 status = nfs4_lookup_root(server, fhandle, info);
3068 if (status != -NFS4ERR_WRONGSEC)
3071 status = nfs4_do_find_root_sec(server, fhandle, info);
3075 status = nfs4_server_capabilities(server, fhandle);
3077 status = nfs4_do_fsinfo(server, fhandle, info);
3079 return nfs4_map_errors(status);
3082 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3083 struct nfs_fsinfo *info)
3086 struct nfs_fattr *fattr = info->fattr;
3087 struct nfs4_label *label = NULL;
3089 error = nfs4_server_capabilities(server, mntfh);
3091 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3095 label = nfs4_label_alloc(server, GFP_KERNEL);
3097 return PTR_ERR(label);
3099 error = nfs4_proc_getattr(server, mntfh, fattr, label);
3101 dprintk("nfs4_get_root: getattr error = %d\n", -error);
3102 goto err_free_label;
3105 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3106 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3107 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3110 nfs4_label_free(label);
3116 * Get locations and (maybe) other attributes of a referral.
3117 * Note that we'll actually follow the referral later when
3118 * we detect fsid mismatch in inode revalidation
3120 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3121 const struct qstr *name, struct nfs_fattr *fattr,
3122 struct nfs_fh *fhandle)
3124 int status = -ENOMEM;
3125 struct page *page = NULL;
3126 struct nfs4_fs_locations *locations = NULL;
3128 page = alloc_page(GFP_KERNEL);
3131 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3132 if (locations == NULL)
3135 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
3140 * If the fsid didn't change, this is a migration event, not a
3141 * referral. Cause us to drop into the exception handler, which
3142 * will kick off migration recovery.
3144 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3145 dprintk("%s: server did not return a different fsid for"
3146 " a referral at %s\n", __func__, name->name);
3147 status = -NFS4ERR_MOVED;
3150 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3151 nfs_fixup_referral_attributes(&locations->fattr);
3153 /* replace the lookup nfs_fattr with the locations nfs_fattr */
3154 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
3155 memset(fhandle, 0, sizeof(struct nfs_fh));
3163 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3164 struct nfs_fattr *fattr, struct nfs4_label *label)
3166 struct nfs4_getattr_arg args = {
3168 .bitmask = server->attr_bitmask,
3170 struct nfs4_getattr_res res = {
3175 struct rpc_message msg = {
3176 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3181 args.bitmask = nfs4_bitmask(server, label);
3183 nfs_fattr_init(fattr);
3184 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3187 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3188 struct nfs_fattr *fattr, struct nfs4_label *label)
3190 struct nfs4_exception exception = { };
3193 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3194 trace_nfs4_getattr(server, fhandle, fattr, err);
3195 err = nfs4_handle_exception(server, err,
3197 } while (exception.retry);
3202 * The file is not closed if it is opened due to the a request to change
3203 * the size of the file. The open call will not be needed once the
3204 * VFS layer lookup-intents are implemented.
3206 * Close is called when the inode is destroyed.
3207 * If we haven't opened the file for O_WRONLY, we
3208 * need to in the size_change case to obtain a stateid.
3211 * Because OPEN is always done by name in nfsv4, it is
3212 * possible that we opened a different file by the same
3213 * name. We can recognize this race condition, but we
3214 * can't do anything about it besides returning an error.
3216 * This will be fixed with VFS changes (lookup-intent).
3219 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3220 struct iattr *sattr)
3222 struct inode *inode = dentry->d_inode;
3223 struct rpc_cred *cred = NULL;
3224 struct nfs4_state *state = NULL;
3225 struct nfs4_label *label = NULL;
3228 if (pnfs_ld_layoutret_on_setattr(inode) &&
3229 sattr->ia_valid & ATTR_SIZE &&
3230 sattr->ia_size < i_size_read(inode))
3231 pnfs_commit_and_return_layout(inode);
3233 nfs_fattr_init(fattr);
3235 /* Deal with open(O_TRUNC) */
3236 if (sattr->ia_valid & ATTR_OPEN)
3237 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
3239 /* Optimization: if the end result is no change, don't RPC */
3240 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
3243 /* Search for an existing open(O_WRITE) file */
3244 if (sattr->ia_valid & ATTR_FILE) {
3245 struct nfs_open_context *ctx;
3247 ctx = nfs_file_open_context(sattr->ia_file);
3254 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3256 return PTR_ERR(label);
3258 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
3260 nfs_setattr_update_inode(inode, sattr);
3261 nfs_setsecurity(inode, fattr, label);
3263 nfs4_label_free(label);
3267 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3268 const struct qstr *name, struct nfs_fh *fhandle,
3269 struct nfs_fattr *fattr, struct nfs4_label *label)
3271 struct nfs_server *server = NFS_SERVER(dir);
3273 struct nfs4_lookup_arg args = {
3274 .bitmask = server->attr_bitmask,
3275 .dir_fh = NFS_FH(dir),
3278 struct nfs4_lookup_res res = {
3284 struct rpc_message msg = {
3285 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3290 args.bitmask = nfs4_bitmask(server, label);
3292 nfs_fattr_init(fattr);
3294 dprintk("NFS call lookup %s\n", name->name);
3295 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
3296 dprintk("NFS reply lookup: %d\n", status);
3300 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
3302 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
3303 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
3304 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3308 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3309 struct qstr *name, struct nfs_fh *fhandle,
3310 struct nfs_fattr *fattr, struct nfs4_label *label)
3312 struct nfs4_exception exception = { };
3313 struct rpc_clnt *client = *clnt;
3316 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
3317 trace_nfs4_lookup(dir, name, err);
3319 case -NFS4ERR_BADNAME:
3322 case -NFS4ERR_MOVED:
3323 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
3325 case -NFS4ERR_WRONGSEC:
3327 if (client != *clnt)
3329 client = nfs4_negotiate_security(client, dir, name);
3331 return PTR_ERR(client);
3333 exception.retry = 1;
3336 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3338 } while (exception.retry);
3343 else if (client != *clnt)
3344 rpc_shutdown_client(client);
3349 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
3350 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3351 struct nfs4_label *label)
3354 struct rpc_clnt *client = NFS_CLIENT(dir);
3356 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
3357 if (client != NFS_CLIENT(dir)) {
3358 rpc_shutdown_client(client);
3359 nfs_fixup_secinfo_attributes(fattr);
3365 nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3366 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3368 struct rpc_clnt *client = NFS_CLIENT(dir);
3371 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
3373 return ERR_PTR(status);
3374 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
3377 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3379 struct nfs_server *server = NFS_SERVER(inode);
3380 struct nfs4_accessargs args = {
3381 .fh = NFS_FH(inode),
3382 .bitmask = server->cache_consistency_bitmask,
3384 struct nfs4_accessres res = {
3387 struct rpc_message msg = {
3388 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3391 .rpc_cred = entry->cred,
3393 int mode = entry->mask;
3397 * Determine which access bits we want to ask for...
3399 if (mode & MAY_READ)
3400 args.access |= NFS4_ACCESS_READ;
3401 if (S_ISDIR(inode->i_mode)) {
3402 if (mode & MAY_WRITE)
3403 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3404 if (mode & MAY_EXEC)
3405 args.access |= NFS4_ACCESS_LOOKUP;
3407 if (mode & MAY_WRITE)
3408 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3409 if (mode & MAY_EXEC)
3410 args.access |= NFS4_ACCESS_EXECUTE;
3413 res.fattr = nfs_alloc_fattr();
3414 if (res.fattr == NULL)
3417 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3419 nfs_access_set_mask(entry, res.access);
3420 nfs_refresh_inode(inode, res.fattr);
3422 nfs_free_fattr(res.fattr);
3426 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3428 struct nfs4_exception exception = { };
3431 err = _nfs4_proc_access(inode, entry);
3432 trace_nfs4_access(inode, err);
3433 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3435 } while (exception.retry);
3440 * TODO: For the time being, we don't try to get any attributes
3441 * along with any of the zero-copy operations READ, READDIR,
3444 * In the case of the first three, we want to put the GETATTR
3445 * after the read-type operation -- this is because it is hard
3446 * to predict the length of a GETATTR response in v4, and thus
3447 * align the READ data correctly. This means that the GETATTR
3448 * may end up partially falling into the page cache, and we should
3449 * shift it into the 'tail' of the xdr_buf before processing.
3450 * To do this efficiently, we need to know the total length
3451 * of data received, which doesn't seem to be available outside
3454 * In the case of WRITE, we also want to put the GETATTR after
3455 * the operation -- in this case because we want to make sure
3456 * we get the post-operation mtime and size.
3458 * Both of these changes to the XDR layer would in fact be quite
3459 * minor, but I decided to leave them for a subsequent patch.
3461 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3462 unsigned int pgbase, unsigned int pglen)
3464 struct nfs4_readlink args = {
3465 .fh = NFS_FH(inode),
3470 struct nfs4_readlink_res res;
3471 struct rpc_message msg = {
3472 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3477 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
3480 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3481 unsigned int pgbase, unsigned int pglen)
3483 struct nfs4_exception exception = { };
3486 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3487 trace_nfs4_readlink(inode, err);
3488 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3490 } while (exception.retry);
3495 * This is just for mknod. open(O_CREAT) will always do ->open_context().
3498 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
3501 struct nfs4_label l, *ilabel = NULL;
3502 struct nfs_open_context *ctx;
3503 struct nfs4_state *state;
3507 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3509 return PTR_ERR(ctx);
3511 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3513 sattr->ia_mode &= ~current_umask();
3514 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
3515 if (IS_ERR(state)) {
3516 status = PTR_ERR(state);
3520 nfs4_label_release_security(ilabel);
3521 put_nfs_open_context(ctx);
3525 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3527 struct nfs_server *server = NFS_SERVER(dir);
3528 struct nfs_removeargs args = {
3532 struct nfs_removeres res = {
3535 struct rpc_message msg = {
3536 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3542 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
3544 update_changeattr(dir, &res.cinfo);
3548 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3550 struct nfs4_exception exception = { };
3553 err = _nfs4_proc_remove(dir, name);
3554 trace_nfs4_remove(dir, name, err);
3555 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3557 } while (exception.retry);
3561 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
3563 struct nfs_server *server = NFS_SERVER(dir);
3564 struct nfs_removeargs *args = msg->rpc_argp;
3565 struct nfs_removeres *res = msg->rpc_resp;
3567 res->server = server;
3568 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
3569 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
3571 nfs_fattr_init(res->dir_attr);
3574 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3576 nfs4_setup_sequence(NFS_SERVER(data->dir),
3577 &data->args.seq_args,
3582 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
3584 struct nfs_unlinkdata *data = task->tk_calldata;
3585 struct nfs_removeres *res = &data->res;
3587 if (!nfs4_sequence_done(task, &res->seq_res))
3589 if (nfs4_async_handle_error(task, res->server, NULL,
3590 &data->timeout) == -EAGAIN)
3592 update_changeattr(dir, &res->cinfo);
3596 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3598 struct nfs_server *server = NFS_SERVER(dir);
3599 struct nfs_renameargs *arg = msg->rpc_argp;
3600 struct nfs_renameres *res = msg->rpc_resp;
3602 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
3603 res->server = server;
3604 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
3607 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3609 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3610 &data->args.seq_args,
3615 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3616 struct inode *new_dir)
3618 struct nfs_renamedata *data = task->tk_calldata;
3619 struct nfs_renameres *res = &data->res;
3621 if (!nfs4_sequence_done(task, &res->seq_res))
3623 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
3626 update_changeattr(old_dir, &res->old_cinfo);
3627 update_changeattr(new_dir, &res->new_cinfo);
3631 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3633 struct nfs_server *server = NFS_SERVER(inode);
3634 struct nfs4_link_arg arg = {
3635 .fh = NFS_FH(inode),
3636 .dir_fh = NFS_FH(dir),
3638 .bitmask = server->attr_bitmask,
3640 struct nfs4_link_res res = {
3644 struct rpc_message msg = {
3645 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3649 int status = -ENOMEM;
3651 res.fattr = nfs_alloc_fattr();
3652 if (res.fattr == NULL)
3655 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3656 if (IS_ERR(res.label)) {
3657 status = PTR_ERR(res.label);
3660 arg.bitmask = nfs4_bitmask(server, res.label);
3662 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3664 update_changeattr(dir, &res.cinfo);
3665 status = nfs_post_op_update_inode(inode, res.fattr);
3667 nfs_setsecurity(inode, res.fattr, res.label);
3671 nfs4_label_free(res.label);
3674 nfs_free_fattr(res.fattr);
3678 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3680 struct nfs4_exception exception = { };
3683 err = nfs4_handle_exception(NFS_SERVER(inode),
3684 _nfs4_proc_link(inode, dir, name),
3686 } while (exception.retry);
3690 struct nfs4_createdata {
3691 struct rpc_message msg;
3692 struct nfs4_create_arg arg;
3693 struct nfs4_create_res res;
3695 struct nfs_fattr fattr;
3696 struct nfs4_label *label;
3699 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3700 struct qstr *name, struct iattr *sattr, u32 ftype)
3702 struct nfs4_createdata *data;
3704 data = kzalloc(sizeof(*data), GFP_KERNEL);
3706 struct nfs_server *server = NFS_SERVER(dir);
3708 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3709 if (IS_ERR(data->label))
3712 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3713 data->msg.rpc_argp = &data->arg;
3714 data->msg.rpc_resp = &data->res;
3715 data->arg.dir_fh = NFS_FH(dir);
3716 data->arg.server = server;
3717 data->arg.name = name;
3718 data->arg.attrs = sattr;
3719 data->arg.ftype = ftype;
3720 data->arg.bitmask = nfs4_bitmask(server, data->label);
3721 data->res.server = server;
3722 data->res.fh = &data->fh;
3723 data->res.fattr = &data->fattr;
3724 data->res.label = data->label;
3725 nfs_fattr_init(data->res.fattr);
3733 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3735 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3736 &data->arg.seq_args, &data->res.seq_res, 1);
3738 update_changeattr(dir, &data->res.dir_cinfo);
3739 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
3744 static void nfs4_free_createdata(struct nfs4_createdata *data)
3746 nfs4_label_free(data->label);
3750 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3751 struct page *page, unsigned int len, struct iattr *sattr,
3752 struct nfs4_label *label)
3754 struct nfs4_createdata *data;
3755 int status = -ENAMETOOLONG;
3757 if (len > NFS4_MAXPATHLEN)
3761 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3765 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3766 data->arg.u.symlink.pages = &page;
3767 data->arg.u.symlink.len = len;
3768 data->arg.label = label;
3770 status = nfs4_do_create(dir, dentry, data);
3772 nfs4_free_createdata(data);
3777 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3778 struct page *page, unsigned int len, struct iattr *sattr)
3780 struct nfs4_exception exception = { };
3781 struct nfs4_label l, *label = NULL;
3784 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3787 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3788 trace_nfs4_symlink(dir, &dentry->d_name, err);
3789 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3791 } while (exception.retry);
3793 nfs4_label_release_security(label);
3797 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3798 struct iattr *sattr, struct nfs4_label *label)
3800 struct nfs4_createdata *data;
3801 int status = -ENOMEM;
3803 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3807 data->arg.label = label;
3808 status = nfs4_do_create(dir, dentry, data);
3810 nfs4_free_createdata(data);
3815 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3816 struct iattr *sattr)
3818 struct nfs4_exception exception = { };
3819 struct nfs4_label l, *label = NULL;
3822 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3824 sattr->ia_mode &= ~current_umask();
3826 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3827 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3828 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3830 } while (exception.retry);
3831 nfs4_label_release_security(label);
3836 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3837 u64 cookie, struct page **pages, unsigned int count, int plus)
3839 struct inode *dir = dentry->d_inode;
3840 struct nfs4_readdir_arg args = {
3845 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3848 struct nfs4_readdir_res res;
3849 struct rpc_message msg = {
3850 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3857 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3859 (unsigned long long)cookie);
3860 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
3861 res.pgbase = args.pgbase;
3862 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3864 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
3865 status += args.pgbase;
3868 nfs_invalidate_atime(dir);
3870 dprintk("%s: returns %d\n", __func__, status);
3874 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3875 u64 cookie, struct page **pages, unsigned int count, int plus)
3877 struct nfs4_exception exception = { };
3880 err = _nfs4_proc_readdir(dentry, cred, cookie,
3881 pages, count, plus);
3882 trace_nfs4_readdir(dentry->d_inode, err);
3883 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
3885 } while (exception.retry);
3889 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3890 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
3892 struct nfs4_createdata *data;
3893 int mode = sattr->ia_mode;
3894 int status = -ENOMEM;
3896 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3901 data->arg.ftype = NF4FIFO;
3902 else if (S_ISBLK(mode)) {
3903 data->arg.ftype = NF4BLK;
3904 data->arg.u.device.specdata1 = MAJOR(rdev);
3905 data->arg.u.device.specdata2 = MINOR(rdev);
3907 else if (S_ISCHR(mode)) {
3908 data->arg.ftype = NF4CHR;
3909 data->arg.u.device.specdata1 = MAJOR(rdev);
3910 data->arg.u.device.specdata2 = MINOR(rdev);
3911 } else if (!S_ISSOCK(mode)) {
3916 data->arg.label = label;
3917 status = nfs4_do_create(dir, dentry, data);
3919 nfs4_free_createdata(data);
3924 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3925 struct iattr *sattr, dev_t rdev)
3927 struct nfs4_exception exception = { };
3928 struct nfs4_label l, *label = NULL;
3931 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3933 sattr->ia_mode &= ~current_umask();
3935 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3936 trace_nfs4_mknod(dir, &dentry->d_name, err);
3937 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3939 } while (exception.retry);
3941 nfs4_label_release_security(label);
3946 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3947 struct nfs_fsstat *fsstat)
3949 struct nfs4_statfs_arg args = {
3951 .bitmask = server->attr_bitmask,
3953 struct nfs4_statfs_res res = {
3956 struct rpc_message msg = {
3957 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3962 nfs_fattr_init(fsstat->fattr);
3963 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3966 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3968 struct nfs4_exception exception = { };
3971 err = nfs4_handle_exception(server,
3972 _nfs4_proc_statfs(server, fhandle, fsstat),
3974 } while (exception.retry);
3978 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3979 struct nfs_fsinfo *fsinfo)
3981 struct nfs4_fsinfo_arg args = {
3983 .bitmask = server->attr_bitmask,
3985 struct nfs4_fsinfo_res res = {
3988 struct rpc_message msg = {
3989 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3994 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3997 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3999 struct nfs4_exception exception = { };
4000 unsigned long now = jiffies;
4004 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
4005 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
4007 struct nfs_client *clp = server->nfs_client;
4009 spin_lock(&clp->cl_lock);
4010 clp->cl_lease_time = fsinfo->lease_time * HZ;
4011 clp->cl_last_renewal = now;
4012 spin_unlock(&clp->cl_lock);
4015 err = nfs4_handle_exception(server, err, &exception);
4016 } while (exception.retry);
4020 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4024 nfs_fattr_init(fsinfo->fattr);
4025 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
4027 /* block layout checks this! */
4028 server->pnfs_blksize = fsinfo->blksize;
4029 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
4035 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4036 struct nfs_pathconf *pathconf)
4038 struct nfs4_pathconf_arg args = {
4040 .bitmask = server->attr_bitmask,
4042 struct nfs4_pathconf_res res = {
4043 .pathconf = pathconf,
4045 struct rpc_message msg = {
4046 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4051 /* None of the pathconf attributes are mandatory to implement */
4052 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4053 memset(pathconf, 0, sizeof(*pathconf));
4057 nfs_fattr_init(pathconf->fattr);
4058 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4061 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4062 struct nfs_pathconf *pathconf)
4064 struct nfs4_exception exception = { };
4068 err = nfs4_handle_exception(server,
4069 _nfs4_proc_pathconf(server, fhandle, pathconf),
4071 } while (exception.retry);
4075 int nfs4_set_rw_stateid(nfs4_stateid *stateid,
4076 const struct nfs_open_context *ctx,
4077 const struct nfs_lock_context *l_ctx,
4080 const struct nfs_lockowner *lockowner = NULL;
4083 lockowner = &l_ctx->lockowner;
4084 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
4086 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4088 static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4089 const struct nfs_open_context *ctx,
4090 const struct nfs_lock_context *l_ctx,
4093 nfs4_stateid current_stateid;
4095 /* If the current stateid represents a lost lock, then exit */
4096 if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode) == -EIO)
4098 return nfs4_stateid_match(stateid, ¤t_stateid);
4101 static bool nfs4_error_stateid_expired(int err)
4104 case -NFS4ERR_DELEG_REVOKED:
4105 case -NFS4ERR_ADMIN_REVOKED:
4106 case -NFS4ERR_BAD_STATEID:
4107 case -NFS4ERR_STALE_STATEID:
4108 case -NFS4ERR_OLD_STATEID:
4109 case -NFS4ERR_OPENMODE:
4110 case -NFS4ERR_EXPIRED:
4116 void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
4118 nfs_invalidate_atime(hdr->inode);
4121 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
4123 struct nfs_server *server = NFS_SERVER(hdr->inode);
4125 trace_nfs4_read(hdr, task->tk_status);
4126 if (nfs4_async_handle_error(task, server,
4127 hdr->args.context->state,
4129 rpc_restart_call_prepare(task);
4133 __nfs4_read_done_cb(hdr);
4134 if (task->tk_status > 0)
4135 renew_lease(server, hdr->timestamp);
4139 static bool nfs4_read_stateid_changed(struct rpc_task *task,
4140 struct nfs_pgio_args *args)
4143 if (!nfs4_error_stateid_expired(task->tk_status) ||
4144 nfs4_stateid_is_current(&args->stateid,
4149 rpc_restart_call_prepare(task);
4153 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4156 dprintk("--> %s\n", __func__);
4158 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4160 if (nfs4_read_stateid_changed(task, &hdr->args))
4162 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4163 nfs4_read_done_cb(task, hdr);
4166 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4167 struct rpc_message *msg)
4169 hdr->timestamp = jiffies;
4170 hdr->pgio_done_cb = nfs4_read_done_cb;
4171 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
4172 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
4175 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4176 struct nfs_pgio_header *hdr)
4178 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4179 &hdr->args.seq_args,
4183 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4184 hdr->args.lock_context,
4185 hdr->rw_ops->rw_mode) == -EIO)
4187 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
4192 static int nfs4_write_done_cb(struct rpc_task *task,
4193 struct nfs_pgio_header *hdr)
4195 struct inode *inode = hdr->inode;
4197 trace_nfs4_write(hdr, task->tk_status);
4198 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4199 hdr->args.context->state,
4201 rpc_restart_call_prepare(task);
4204 if (task->tk_status >= 0) {
4205 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4206 nfs_post_op_update_inode_force_wcc(inode, &hdr->fattr);
4211 static bool nfs4_write_stateid_changed(struct rpc_task *task,
4212 struct nfs_pgio_args *args)
4215 if (!nfs4_error_stateid_expired(task->tk_status) ||
4216 nfs4_stateid_is_current(&args->stateid,
4221 rpc_restart_call_prepare(task);
4225 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4227 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4229 if (nfs4_write_stateid_changed(task, &hdr->args))
4231 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4232 nfs4_write_done_cb(task, hdr);
4236 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
4238 /* Don't request attributes for pNFS or O_DIRECT writes */
4239 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
4241 /* Otherwise, request attributes if and only if we don't hold
4244 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
4247 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4248 struct rpc_message *msg)
4250 struct nfs_server *server = NFS_SERVER(hdr->inode);
4252 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4253 hdr->args.bitmask = NULL;
4254 hdr->res.fattr = NULL;
4256 hdr->args.bitmask = server->cache_consistency_bitmask;
4258 if (!hdr->pgio_done_cb)
4259 hdr->pgio_done_cb = nfs4_write_done_cb;
4260 hdr->res.server = server;
4261 hdr->timestamp = jiffies;
4263 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
4264 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
4267 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
4269 nfs4_setup_sequence(NFS_SERVER(data->inode),
4270 &data->args.seq_args,
4275 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
4277 struct inode *inode = data->inode;
4279 trace_nfs4_commit(data, task->tk_status);
4280 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4281 NULL, NULL) == -EAGAIN) {
4282 rpc_restart_call_prepare(task);
4288 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
4290 if (!nfs4_sequence_done(task, &data->res.seq_res))
4292 return data->commit_done_cb(task, data);
4295 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
4297 struct nfs_server *server = NFS_SERVER(data->inode);
4299 if (data->commit_done_cb == NULL)
4300 data->commit_done_cb = nfs4_commit_done_cb;
4301 data->res.server = server;
4302 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
4303 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4306 struct nfs4_renewdata {
4307 struct nfs_client *client;
4308 unsigned long timestamp;
4312 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4313 * standalone procedure for queueing an asynchronous RENEW.
4315 static void nfs4_renew_release(void *calldata)
4317 struct nfs4_renewdata *data = calldata;
4318 struct nfs_client *clp = data->client;
4320 if (atomic_read(&clp->cl_count) > 1)
4321 nfs4_schedule_state_renewal(clp);
4322 nfs_put_client(clp);
4326 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
4328 struct nfs4_renewdata *data = calldata;
4329 struct nfs_client *clp = data->client;
4330 unsigned long timestamp = data->timestamp;
4332 trace_nfs4_renew_async(clp, task->tk_status);
4333 switch (task->tk_status) {
4336 case -NFS4ERR_LEASE_MOVED:
4337 nfs4_schedule_lease_moved_recovery(clp);
4340 /* Unless we're shutting down, schedule state recovery! */
4341 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4343 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
4344 nfs4_schedule_lease_recovery(clp);
4347 nfs4_schedule_path_down_recovery(clp);
4349 do_renew_lease(clp, timestamp);
4352 static const struct rpc_call_ops nfs4_renew_ops = {
4353 .rpc_call_done = nfs4_renew_done,
4354 .rpc_release = nfs4_renew_release,
4357 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
4359 struct rpc_message msg = {
4360 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4364 struct nfs4_renewdata *data;
4366 if (renew_flags == 0)
4368 if (!atomic_inc_not_zero(&clp->cl_count))
4370 data = kmalloc(sizeof(*data), GFP_NOFS);
4374 data->timestamp = jiffies;
4375 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
4376 &nfs4_renew_ops, data);
4379 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
4381 struct rpc_message msg = {
4382 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4386 unsigned long now = jiffies;
4389 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4392 do_renew_lease(clp, now);
4396 static inline int nfs4_server_supports_acls(struct nfs_server *server)
4398 return server->caps & NFS_CAP_ACLS;
4401 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4402 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
4405 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
4407 static int buf_to_pages_noslab(const void *buf, size_t buflen,
4408 struct page **pages, unsigned int *pgbase)
4410 struct page *newpage, **spages;
4416 len = min_t(size_t, PAGE_SIZE, buflen);
4417 newpage = alloc_page(GFP_KERNEL);
4419 if (newpage == NULL)
4421 memcpy(page_address(newpage), buf, len);
4426 } while (buflen != 0);
4432 __free_page(spages[rc-1]);
4436 struct nfs4_cached_acl {
4442 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4444 struct nfs_inode *nfsi = NFS_I(inode);
4446 spin_lock(&inode->i_lock);
4447 kfree(nfsi->nfs4_acl);
4448 nfsi->nfs4_acl = acl;
4449 spin_unlock(&inode->i_lock);
4452 static void nfs4_zap_acl_attr(struct inode *inode)
4454 nfs4_set_cached_acl(inode, NULL);
4457 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4459 struct nfs_inode *nfsi = NFS_I(inode);
4460 struct nfs4_cached_acl *acl;
4463 spin_lock(&inode->i_lock);
4464 acl = nfsi->nfs4_acl;
4467 if (buf == NULL) /* user is just asking for length */
4469 if (acl->cached == 0)
4471 ret = -ERANGE; /* see getxattr(2) man page */
4472 if (acl->len > buflen)
4474 memcpy(buf, acl->data, acl->len);
4478 spin_unlock(&inode->i_lock);
4482 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
4484 struct nfs4_cached_acl *acl;
4485 size_t buflen = sizeof(*acl) + acl_len;
4487 if (buflen <= PAGE_SIZE) {
4488 acl = kmalloc(buflen, GFP_KERNEL);
4492 _copy_from_pages(acl->data, pages, pgbase, acl_len);
4494 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4501 nfs4_set_cached_acl(inode, acl);
4505 * The getxattr API returns the required buffer length when called with a
4506 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4507 * the required buf. On a NULL buf, we send a page of data to the server
4508 * guessing that the ACL request can be serviced by a page. If so, we cache
4509 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4510 * the cache. If not so, we throw away the page, and cache the required
4511 * length. The next getxattr call will then produce another round trip to
4512 * the server, this time with the input buf of the required size.
4514 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4516 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
4517 struct nfs_getaclargs args = {
4518 .fh = NFS_FH(inode),
4522 struct nfs_getaclres res = {
4525 struct rpc_message msg = {
4526 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4530 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4531 int ret = -ENOMEM, i;
4533 /* As long as we're doing a round trip to the server anyway,
4534 * let's be prepared for a page of acl data. */
4537 if (npages > ARRAY_SIZE(pages))
4540 for (i = 0; i < npages; i++) {
4541 pages[i] = alloc_page(GFP_KERNEL);
4546 /* for decoding across pages */
4547 res.acl_scratch = alloc_page(GFP_KERNEL);
4548 if (!res.acl_scratch)
4551 args.acl_len = npages * PAGE_SIZE;
4552 args.acl_pgbase = 0;
4554 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
4555 __func__, buf, buflen, npages, args.acl_len);
4556 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4557 &msg, &args.seq_args, &res.seq_res, 0);
4561 /* Handle the case where the passed-in buffer is too short */
4562 if (res.acl_flags & NFS4_ACL_TRUNC) {
4563 /* Did the user only issue a request for the acl length? */
4569 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
4571 if (res.acl_len > buflen) {
4575 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
4580 for (i = 0; i < npages; i++)
4582 __free_page(pages[i]);
4583 if (res.acl_scratch)
4584 __free_page(res.acl_scratch);
4588 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4590 struct nfs4_exception exception = { };
4593 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4594 trace_nfs4_get_acl(inode, ret);
4597 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4598 } while (exception.retry);
4602 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4604 struct nfs_server *server = NFS_SERVER(inode);
4607 if (!nfs4_server_supports_acls(server))
4609 ret = nfs_revalidate_inode(server, inode);
4612 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4613 nfs_zap_acl_cache(inode);
4614 ret = nfs4_read_cached_acl(inode, buf, buflen);
4616 /* -ENOENT is returned if there is no ACL or if there is an ACL
4617 * but no cached acl data, just the acl length */
4619 return nfs4_get_acl_uncached(inode, buf, buflen);
4622 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4624 struct nfs_server *server = NFS_SERVER(inode);
4625 struct page *pages[NFS4ACL_MAXPAGES];
4626 struct nfs_setaclargs arg = {
4627 .fh = NFS_FH(inode),
4631 struct nfs_setaclres res;
4632 struct rpc_message msg = {
4633 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4637 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4640 if (!nfs4_server_supports_acls(server))
4642 if (npages > ARRAY_SIZE(pages))
4644 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4647 nfs4_inode_return_delegation(inode);
4648 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4651 * Free each page after tx, so the only ref left is
4652 * held by the network stack
4655 put_page(pages[i-1]);
4658 * Acl update can result in inode attribute update.
4659 * so mark the attribute cache invalid.
4661 spin_lock(&inode->i_lock);
4662 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4663 spin_unlock(&inode->i_lock);
4664 nfs_access_zap_cache(inode);
4665 nfs_zap_acl_cache(inode);
4669 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4671 struct nfs4_exception exception = { };
4674 err = __nfs4_proc_set_acl(inode, buf, buflen);
4675 trace_nfs4_set_acl(inode, err);
4676 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4678 } while (exception.retry);
4682 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
4683 static int _nfs4_get_security_label(struct inode *inode, void *buf,
4686 struct nfs_server *server = NFS_SERVER(inode);
4687 struct nfs_fattr fattr;
4688 struct nfs4_label label = {0, 0, buflen, buf};
4690 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4691 struct nfs4_getattr_arg arg = {
4692 .fh = NFS_FH(inode),
4695 struct nfs4_getattr_res res = {
4700 struct rpc_message msg = {
4701 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4707 nfs_fattr_init(&fattr);
4709 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
4712 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4714 if (buflen < label.len)
4719 static int nfs4_get_security_label(struct inode *inode, void *buf,
4722 struct nfs4_exception exception = { };
4725 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4729 err = _nfs4_get_security_label(inode, buf, buflen);
4730 trace_nfs4_get_security_label(inode, err);
4731 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4733 } while (exception.retry);
4737 static int _nfs4_do_set_security_label(struct inode *inode,
4738 struct nfs4_label *ilabel,
4739 struct nfs_fattr *fattr,
4740 struct nfs4_label *olabel)
4743 struct iattr sattr = {0};
4744 struct nfs_server *server = NFS_SERVER(inode);
4745 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4746 struct nfs_setattrargs arg = {
4747 .fh = NFS_FH(inode),
4753 struct nfs_setattrres res = {
4758 struct rpc_message msg = {
4759 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
4765 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
4767 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4769 dprintk("%s failed: %d\n", __func__, status);
4774 static int nfs4_do_set_security_label(struct inode *inode,
4775 struct nfs4_label *ilabel,
4776 struct nfs_fattr *fattr,
4777 struct nfs4_label *olabel)
4779 struct nfs4_exception exception = { };
4783 err = _nfs4_do_set_security_label(inode, ilabel,
4785 trace_nfs4_set_security_label(inode, err);
4786 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4788 } while (exception.retry);
4793 nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4795 struct nfs4_label ilabel, *olabel = NULL;
4796 struct nfs_fattr fattr;
4797 struct rpc_cred *cred;
4798 struct inode *inode = dentry->d_inode;
4801 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4804 nfs_fattr_init(&fattr);
4808 ilabel.label = (char *)buf;
4809 ilabel.len = buflen;
4811 cred = rpc_lookup_cred();
4813 return PTR_ERR(cred);
4815 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4816 if (IS_ERR(olabel)) {
4817 status = -PTR_ERR(olabel);
4821 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4823 nfs_setsecurity(inode, &fattr, olabel);
4825 nfs4_label_free(olabel);
4830 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4834 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
4835 struct nfs4_state *state, long *timeout)
4837 struct nfs_client *clp = server->nfs_client;
4839 if (task->tk_status >= 0)
4841 switch(task->tk_status) {
4842 case -NFS4ERR_DELEG_REVOKED:
4843 case -NFS4ERR_ADMIN_REVOKED:
4844 case -NFS4ERR_BAD_STATEID:
4847 nfs_remove_bad_delegation(state->inode);
4848 case -NFS4ERR_OPENMODE:
4851 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4852 goto recovery_failed;
4853 goto wait_on_recovery;
4854 case -NFS4ERR_EXPIRED:
4855 if (state != NULL) {
4856 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4857 goto recovery_failed;
4859 case -NFS4ERR_STALE_STATEID:
4860 case -NFS4ERR_STALE_CLIENTID:
4861 nfs4_schedule_lease_recovery(clp);
4862 goto wait_on_recovery;
4863 case -NFS4ERR_MOVED:
4864 if (nfs4_schedule_migration_recovery(server) < 0)
4865 goto recovery_failed;
4866 goto wait_on_recovery;
4867 case -NFS4ERR_LEASE_MOVED:
4868 nfs4_schedule_lease_moved_recovery(clp);
4869 goto wait_on_recovery;
4870 #if defined(CONFIG_NFS_V4_1)
4871 case -NFS4ERR_BADSESSION:
4872 case -NFS4ERR_BADSLOT:
4873 case -NFS4ERR_BAD_HIGH_SLOT:
4874 case -NFS4ERR_DEADSESSION:
4875 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4876 case -NFS4ERR_SEQ_FALSE_RETRY:
4877 case -NFS4ERR_SEQ_MISORDERED:
4878 dprintk("%s ERROR %d, Reset session\n", __func__,
4880 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4881 goto wait_on_recovery;
4882 #endif /* CONFIG_NFS_V4_1 */
4883 case -NFS4ERR_DELAY:
4884 nfs_inc_server_stats(server, NFSIOS_DELAY);
4885 rpc_delay(task, nfs4_update_delay(timeout));
4887 case -NFS4ERR_GRACE:
4888 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4889 case -NFS4ERR_RETRY_UNCACHED_REP:
4890 case -NFS4ERR_OLD_STATEID:
4893 task->tk_status = nfs4_map_errors(task->tk_status);
4896 task->tk_status = -EIO;
4899 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
4900 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4901 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4902 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4903 goto recovery_failed;
4905 task->tk_status = 0;
4909 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4910 nfs4_verifier *bootverf)
4914 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4915 /* An impossible timestamp guarantees this value
4916 * will never match a generated boot time. */
4918 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
4920 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4921 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4922 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
4924 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4928 nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4929 char *buf, size_t len)
4931 unsigned int result;
4934 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4936 rpc_peeraddr2str(clp->cl_rpcclient,
4938 rpc_peeraddr2str(clp->cl_rpcclient,
4939 RPC_DISPLAY_PROTO));
4945 nfs4_init_uniform_client_string(const struct nfs_client *clp,
4946 char *buf, size_t len)
4948 const char *nodename = clp->cl_rpcclient->cl_nodename;
4950 if (nfs4_client_id_uniquifier[0] != '\0')
4951 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4952 clp->rpc_ops->version,
4953 clp->cl_minorversion,
4954 nfs4_client_id_uniquifier,
4956 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4957 clp->rpc_ops->version, clp->cl_minorversion,
4962 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
4963 * services. Advertise one based on the address family of the
4967 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
4969 if (strchr(clp->cl_ipaddr, ':') != NULL)
4970 return scnprintf(buf, len, "tcp6");
4972 return scnprintf(buf, len, "tcp");
4975 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
4977 struct nfs4_setclientid *sc = calldata;
4979 if (task->tk_status == 0)
4980 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
4983 static const struct rpc_call_ops nfs4_setclientid_ops = {
4984 .rpc_call_done = nfs4_setclientid_done,
4988 * nfs4_proc_setclientid - Negotiate client ID
4989 * @clp: state data structure
4990 * @program: RPC program for NFSv4 callback service
4991 * @port: IP port number for NFS4 callback service
4992 * @cred: RPC credential to use for this call
4993 * @res: where to place the result
4995 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4997 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4998 unsigned short port, struct rpc_cred *cred,
4999 struct nfs4_setclientid_res *res)
5001 nfs4_verifier sc_verifier;
5002 struct nfs4_setclientid setclientid = {
5003 .sc_verifier = &sc_verifier,
5005 .sc_cb_ident = clp->cl_cb_ident,
5007 struct rpc_message msg = {
5008 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5009 .rpc_argp = &setclientid,
5013 struct rpc_task *task;
5014 struct rpc_task_setup task_setup_data = {
5015 .rpc_client = clp->cl_rpcclient,
5016 .rpc_message = &msg,
5017 .callback_ops = &nfs4_setclientid_ops,
5018 .callback_data = &setclientid,
5019 .flags = RPC_TASK_TIMEOUT,
5023 /* nfs_client_id4 */
5024 nfs4_init_boot_verifier(clp, &sc_verifier);
5025 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5026 setclientid.sc_name_len =
5027 nfs4_init_uniform_client_string(clp,
5028 setclientid.sc_name,
5029 sizeof(setclientid.sc_name));
5031 setclientid.sc_name_len =
5032 nfs4_init_nonuniform_client_string(clp,
5033 setclientid.sc_name,
5034 sizeof(setclientid.sc_name));
5036 setclientid.sc_netid_len =
5037 nfs4_init_callback_netid(clp,
5038 setclientid.sc_netid,
5039 sizeof(setclientid.sc_netid));
5040 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
5041 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
5042 clp->cl_ipaddr, port >> 8, port & 255);
5044 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
5045 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5046 setclientid.sc_name_len, setclientid.sc_name);
5047 task = rpc_run_task(&task_setup_data);
5049 status = PTR_ERR(task);
5052 status = task->tk_status;
5053 if (setclientid.sc_cred) {
5054 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5055 put_rpccred(setclientid.sc_cred);
5059 trace_nfs4_setclientid(clp, status);
5060 dprintk("NFS reply setclientid: %d\n", status);
5065 * nfs4_proc_setclientid_confirm - Confirm client ID
5066 * @clp: state data structure
5067 * @res: result of a previous SETCLIENTID
5068 * @cred: RPC credential to use for this call
5070 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5072 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
5073 struct nfs4_setclientid_res *arg,
5074 struct rpc_cred *cred)
5076 struct rpc_message msg = {
5077 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
5083 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5084 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5086 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5087 trace_nfs4_setclientid_confirm(clp, status);
5088 dprintk("NFS reply setclientid_confirm: %d\n", status);
5092 struct nfs4_delegreturndata {
5093 struct nfs4_delegreturnargs args;
5094 struct nfs4_delegreturnres res;
5096 nfs4_stateid stateid;
5097 unsigned long timestamp;
5098 struct nfs_fattr fattr;
5100 struct inode *inode;
5105 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5107 struct nfs4_delegreturndata *data = calldata;
5109 if (!nfs4_sequence_done(task, &data->res.seq_res))
5112 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
5113 switch (task->tk_status) {
5115 renew_lease(data->res.server, data->timestamp);
5116 case -NFS4ERR_ADMIN_REVOKED:
5117 case -NFS4ERR_DELEG_REVOKED:
5118 case -NFS4ERR_BAD_STATEID:
5119 case -NFS4ERR_OLD_STATEID:
5120 case -NFS4ERR_STALE_STATEID:
5121 case -NFS4ERR_EXPIRED:
5122 task->tk_status = 0;
5124 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
5127 if (nfs4_async_handle_error(task, data->res.server,
5128 NULL, NULL) == -EAGAIN) {
5129 rpc_restart_call_prepare(task);
5133 data->rpc_status = task->tk_status;
5136 static void nfs4_delegreturn_release(void *calldata)
5138 struct nfs4_delegreturndata *data = calldata;
5141 pnfs_roc_release(data->inode);
5145 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5147 struct nfs4_delegreturndata *d_data;
5149 d_data = (struct nfs4_delegreturndata *)data;
5152 pnfs_roc_drain(d_data->inode, &d_data->roc_barrier, task))
5155 nfs4_setup_sequence(d_data->res.server,
5156 &d_data->args.seq_args,
5157 &d_data->res.seq_res,
5161 static const struct rpc_call_ops nfs4_delegreturn_ops = {
5162 .rpc_call_prepare = nfs4_delegreturn_prepare,
5163 .rpc_call_done = nfs4_delegreturn_done,
5164 .rpc_release = nfs4_delegreturn_release,
5167 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5169 struct nfs4_delegreturndata *data;
5170 struct nfs_server *server = NFS_SERVER(inode);
5171 struct rpc_task *task;
5172 struct rpc_message msg = {
5173 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5176 struct rpc_task_setup task_setup_data = {
5177 .rpc_client = server->client,
5178 .rpc_message = &msg,
5179 .callback_ops = &nfs4_delegreturn_ops,
5180 .flags = RPC_TASK_ASYNC,
5184 data = kzalloc(sizeof(*data), GFP_NOFS);
5187 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
5188 data->args.fhandle = &data->fh;
5189 data->args.stateid = &data->stateid;
5190 data->args.bitmask = server->cache_consistency_bitmask;
5191 nfs_copy_fh(&data->fh, NFS_FH(inode));
5192 nfs4_stateid_copy(&data->stateid, stateid);
5193 data->res.fattr = &data->fattr;
5194 data->res.server = server;
5195 nfs_fattr_init(data->res.fattr);
5196 data->timestamp = jiffies;
5197 data->rpc_status = 0;
5198 data->inode = inode;
5199 data->roc = list_empty(&NFS_I(inode)->open_files) ?
5200 pnfs_roc(inode) : false;
5202 task_setup_data.callback_data = data;
5203 msg.rpc_argp = &data->args;
5204 msg.rpc_resp = &data->res;
5205 task = rpc_run_task(&task_setup_data);
5207 return PTR_ERR(task);
5210 status = nfs4_wait_for_completion_rpc_task(task);
5213 status = data->rpc_status;
5215 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5217 nfs_refresh_inode(inode, &data->fattr);
5223 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5225 struct nfs_server *server = NFS_SERVER(inode);
5226 struct nfs4_exception exception = { };
5229 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
5230 trace_nfs4_delegreturn(inode, err);
5232 case -NFS4ERR_STALE_STATEID:
5233 case -NFS4ERR_EXPIRED:
5237 err = nfs4_handle_exception(server, err, &exception);
5238 } while (exception.retry);
5242 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5243 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5246 * sleep, with exponential backoff, and retry the LOCK operation.
5248 static unsigned long
5249 nfs4_set_lock_task_retry(unsigned long timeout)
5251 freezable_schedule_timeout_killable_unsafe(timeout);
5253 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5254 return NFS4_LOCK_MAXTIMEOUT;
5258 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5260 struct inode *inode = state->inode;
5261 struct nfs_server *server = NFS_SERVER(inode);
5262 struct nfs_client *clp = server->nfs_client;
5263 struct nfs_lockt_args arg = {
5264 .fh = NFS_FH(inode),
5267 struct nfs_lockt_res res = {
5270 struct rpc_message msg = {
5271 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5274 .rpc_cred = state->owner->so_cred,
5276 struct nfs4_lock_state *lsp;
5279 arg.lock_owner.clientid = clp->cl_clientid;
5280 status = nfs4_set_lock_state(state, request);
5283 lsp = request->fl_u.nfs4_fl.owner;
5284 arg.lock_owner.id = lsp->ls_seqid.owner_id;
5285 arg.lock_owner.s_dev = server->s_dev;
5286 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5289 request->fl_type = F_UNLCK;
5291 case -NFS4ERR_DENIED:
5294 request->fl_ops->fl_release_private(request);
5295 request->fl_ops = NULL;
5300 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5302 struct nfs4_exception exception = { };
5306 err = _nfs4_proc_getlk(state, cmd, request);
5307 trace_nfs4_get_lock(request, state, cmd, err);
5308 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
5310 } while (exception.retry);
5314 static int do_vfs_lock(struct file *file, struct file_lock *fl)
5317 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5319 res = posix_lock_file_wait(file, fl);
5322 res = flock_lock_file_wait(file, fl);
5330 struct nfs4_unlockdata {
5331 struct nfs_locku_args arg;
5332 struct nfs_locku_res res;
5333 struct nfs4_lock_state *lsp;
5334 struct nfs_open_context *ctx;
5335 struct file_lock fl;
5336 const struct nfs_server *server;
5337 unsigned long timestamp;
5340 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5341 struct nfs_open_context *ctx,
5342 struct nfs4_lock_state *lsp,
5343 struct nfs_seqid *seqid)
5345 struct nfs4_unlockdata *p;
5346 struct inode *inode = lsp->ls_state->inode;
5348 p = kzalloc(sizeof(*p), GFP_NOFS);
5351 p->arg.fh = NFS_FH(inode);
5353 p->arg.seqid = seqid;
5354 p->res.seqid = seqid;
5355 p->arg.stateid = &lsp->ls_stateid;
5357 atomic_inc(&lsp->ls_count);
5358 /* Ensure we don't close file until we're done freeing locks! */
5359 p->ctx = get_nfs_open_context(ctx);
5360 memcpy(&p->fl, fl, sizeof(p->fl));
5361 p->server = NFS_SERVER(inode);
5365 static void nfs4_locku_release_calldata(void *data)
5367 struct nfs4_unlockdata *calldata = data;
5368 nfs_free_seqid(calldata->arg.seqid);
5369 nfs4_put_lock_state(calldata->lsp);
5370 put_nfs_open_context(calldata->ctx);
5374 static void nfs4_locku_done(struct rpc_task *task, void *data)
5376 struct nfs4_unlockdata *calldata = data;
5378 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5380 switch (task->tk_status) {
5382 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5383 &calldata->res.stateid);
5384 renew_lease(calldata->server, calldata->timestamp);
5386 case -NFS4ERR_BAD_STATEID:
5387 case -NFS4ERR_OLD_STATEID:
5388 case -NFS4ERR_STALE_STATEID:
5389 case -NFS4ERR_EXPIRED:
5392 if (nfs4_async_handle_error(task, calldata->server,
5393 NULL, NULL) == -EAGAIN)
5394 rpc_restart_call_prepare(task);
5396 nfs_release_seqid(calldata->arg.seqid);
5399 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
5401 struct nfs4_unlockdata *calldata = data;
5403 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
5405 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
5406 /* Note: exit _without_ running nfs4_locku_done */
5409 calldata->timestamp = jiffies;
5410 if (nfs4_setup_sequence(calldata->server,
5411 &calldata->arg.seq_args,
5412 &calldata->res.seq_res,
5414 nfs_release_seqid(calldata->arg.seqid);
5417 task->tk_action = NULL;
5419 nfs4_sequence_done(task, &calldata->res.seq_res);
5422 static const struct rpc_call_ops nfs4_locku_ops = {
5423 .rpc_call_prepare = nfs4_locku_prepare,
5424 .rpc_call_done = nfs4_locku_done,
5425 .rpc_release = nfs4_locku_release_calldata,
5428 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5429 struct nfs_open_context *ctx,
5430 struct nfs4_lock_state *lsp,
5431 struct nfs_seqid *seqid)
5433 struct nfs4_unlockdata *data;
5434 struct rpc_message msg = {
5435 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5436 .rpc_cred = ctx->cred,
5438 struct rpc_task_setup task_setup_data = {
5439 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5440 .rpc_message = &msg,
5441 .callback_ops = &nfs4_locku_ops,
5442 .workqueue = nfsiod_workqueue,
5443 .flags = RPC_TASK_ASYNC,
5446 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5447 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5449 /* Ensure this is an unlock - when canceling a lock, the
5450 * canceled lock is passed in, and it won't be an unlock.
5452 fl->fl_type = F_UNLCK;
5454 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5456 nfs_free_seqid(seqid);
5457 return ERR_PTR(-ENOMEM);
5460 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5461 msg.rpc_argp = &data->arg;
5462 msg.rpc_resp = &data->res;
5463 task_setup_data.callback_data = data;
5464 return rpc_run_task(&task_setup_data);
5467 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5469 struct inode *inode = state->inode;
5470 struct nfs4_state_owner *sp = state->owner;
5471 struct nfs_inode *nfsi = NFS_I(inode);
5472 struct nfs_seqid *seqid;
5473 struct nfs4_lock_state *lsp;
5474 struct rpc_task *task;
5476 unsigned char fl_flags = request->fl_flags;
5478 status = nfs4_set_lock_state(state, request);
5479 /* Unlock _before_ we do the RPC call */
5480 request->fl_flags |= FL_EXISTS;
5481 /* Exclude nfs_delegation_claim_locks() */
5482 mutex_lock(&sp->so_delegreturn_mutex);
5483 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
5484 down_read(&nfsi->rwsem);
5485 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5486 up_read(&nfsi->rwsem);
5487 mutex_unlock(&sp->so_delegreturn_mutex);
5490 up_read(&nfsi->rwsem);
5491 mutex_unlock(&sp->so_delegreturn_mutex);
5494 /* Is this a delegated lock? */
5495 lsp = request->fl_u.nfs4_fl.owner;
5496 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5498 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
5502 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
5503 status = PTR_ERR(task);
5506 status = nfs4_wait_for_completion_rpc_task(task);
5509 request->fl_flags = fl_flags;
5510 trace_nfs4_unlock(request, state, F_SETLK, status);
5514 struct nfs4_lockdata {
5515 struct nfs_lock_args arg;
5516 struct nfs_lock_res res;
5517 struct nfs4_lock_state *lsp;
5518 struct nfs_open_context *ctx;
5519 struct file_lock fl;
5520 unsigned long timestamp;
5523 struct nfs_server *server;
5526 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
5527 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5530 struct nfs4_lockdata *p;
5531 struct inode *inode = lsp->ls_state->inode;
5532 struct nfs_server *server = NFS_SERVER(inode);
5534 p = kzalloc(sizeof(*p), gfp_mask);
5538 p->arg.fh = NFS_FH(inode);
5540 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
5541 if (p->arg.open_seqid == NULL)
5543 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
5544 if (p->arg.lock_seqid == NULL)
5545 goto out_free_seqid;
5546 p->arg.lock_stateid = &lsp->ls_stateid;
5547 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
5548 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
5549 p->arg.lock_owner.s_dev = server->s_dev;
5550 p->res.lock_seqid = p->arg.lock_seqid;
5553 atomic_inc(&lsp->ls_count);
5554 p->ctx = get_nfs_open_context(ctx);
5555 memcpy(&p->fl, fl, sizeof(p->fl));
5558 nfs_free_seqid(p->arg.open_seqid);
5564 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5566 struct nfs4_lockdata *data = calldata;
5567 struct nfs4_state *state = data->lsp->ls_state;
5569 dprintk("%s: begin!\n", __func__);
5570 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
5572 /* Do we need to do an open_to_lock_owner? */
5573 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
5574 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
5575 goto out_release_lock_seqid;
5577 data->arg.open_stateid = &state->open_stateid;
5578 data->arg.new_lock_owner = 1;
5579 data->res.open_seqid = data->arg.open_seqid;
5581 data->arg.new_lock_owner = 0;
5582 if (!nfs4_valid_open_stateid(state)) {
5583 data->rpc_status = -EBADF;
5584 task->tk_action = NULL;
5585 goto out_release_open_seqid;
5587 data->timestamp = jiffies;
5588 if (nfs4_setup_sequence(data->server,
5589 &data->arg.seq_args,
5593 out_release_open_seqid:
5594 nfs_release_seqid(data->arg.open_seqid);
5595 out_release_lock_seqid:
5596 nfs_release_seqid(data->arg.lock_seqid);
5598 nfs4_sequence_done(task, &data->res.seq_res);
5599 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
5602 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5604 struct nfs4_lockdata *data = calldata;
5606 dprintk("%s: begin!\n", __func__);
5608 if (!nfs4_sequence_done(task, &data->res.seq_res))
5611 data->rpc_status = task->tk_status;
5612 if (data->arg.new_lock_owner != 0) {
5613 if (data->rpc_status == 0)
5614 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5618 if (data->rpc_status == 0) {
5619 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
5620 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
5621 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
5624 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
5627 static void nfs4_lock_release(void *calldata)
5629 struct nfs4_lockdata *data = calldata;
5631 dprintk("%s: begin!\n", __func__);
5632 nfs_free_seqid(data->arg.open_seqid);
5633 if (data->cancelled != 0) {
5634 struct rpc_task *task;
5635 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5636 data->arg.lock_seqid);
5638 rpc_put_task_async(task);
5639 dprintk("%s: cancelling lock!\n", __func__);
5641 nfs_free_seqid(data->arg.lock_seqid);
5642 nfs4_put_lock_state(data->lsp);
5643 put_nfs_open_context(data->ctx);
5645 dprintk("%s: done!\n", __func__);
5648 static const struct rpc_call_ops nfs4_lock_ops = {
5649 .rpc_call_prepare = nfs4_lock_prepare,
5650 .rpc_call_done = nfs4_lock_done,
5651 .rpc_release = nfs4_lock_release,
5654 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5657 case -NFS4ERR_ADMIN_REVOKED:
5658 case -NFS4ERR_BAD_STATEID:
5659 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
5660 if (new_lock_owner != 0 ||
5661 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
5662 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
5664 case -NFS4ERR_STALE_STATEID:
5665 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
5666 case -NFS4ERR_EXPIRED:
5667 nfs4_schedule_lease_recovery(server->nfs_client);
5671 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
5673 struct nfs4_lockdata *data;
5674 struct rpc_task *task;
5675 struct rpc_message msg = {
5676 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5677 .rpc_cred = state->owner->so_cred,
5679 struct rpc_task_setup task_setup_data = {
5680 .rpc_client = NFS_CLIENT(state->inode),
5681 .rpc_message = &msg,
5682 .callback_ops = &nfs4_lock_ops,
5683 .workqueue = nfsiod_workqueue,
5684 .flags = RPC_TASK_ASYNC,
5688 dprintk("%s: begin!\n", __func__);
5689 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
5690 fl->fl_u.nfs4_fl.owner,
5691 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
5695 data->arg.block = 1;
5696 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5697 msg.rpc_argp = &data->arg;
5698 msg.rpc_resp = &data->res;
5699 task_setup_data.callback_data = data;
5700 if (recovery_type > NFS_LOCK_NEW) {
5701 if (recovery_type == NFS_LOCK_RECLAIM)
5702 data->arg.reclaim = NFS_LOCK_RECLAIM;
5703 nfs4_set_sequence_privileged(&data->arg.seq_args);
5705 task = rpc_run_task(&task_setup_data);
5707 return PTR_ERR(task);
5708 ret = nfs4_wait_for_completion_rpc_task(task);
5710 ret = data->rpc_status;
5712 nfs4_handle_setlk_error(data->server, data->lsp,
5713 data->arg.new_lock_owner, ret);
5715 data->cancelled = 1;
5717 dprintk("%s: done, ret = %d!\n", __func__, ret);
5721 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5723 struct nfs_server *server = NFS_SERVER(state->inode);
5724 struct nfs4_exception exception = {
5725 .inode = state->inode,
5730 /* Cache the lock if possible... */
5731 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5733 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
5734 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
5735 if (err != -NFS4ERR_DELAY)
5737 nfs4_handle_exception(server, err, &exception);
5738 } while (exception.retry);
5742 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5744 struct nfs_server *server = NFS_SERVER(state->inode);
5745 struct nfs4_exception exception = {
5746 .inode = state->inode,
5750 err = nfs4_set_lock_state(state, request);
5753 if (!recover_lost_locks) {
5754 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5758 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5760 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
5761 trace_nfs4_lock_expired(request, state, F_SETLK, err);
5765 case -NFS4ERR_GRACE:
5766 case -NFS4ERR_DELAY:
5767 nfs4_handle_exception(server, err, &exception);
5770 } while (exception.retry);
5775 #if defined(CONFIG_NFS_V4_1)
5777 * nfs41_check_expired_locks - possibly free a lock stateid
5779 * @state: NFSv4 state for an inode
5781 * Returns NFS_OK if recovery for this stateid is now finished.
5782 * Otherwise a negative NFS4ERR value is returned.
5784 static int nfs41_check_expired_locks(struct nfs4_state *state)
5786 int status, ret = -NFS4ERR_BAD_STATEID;
5787 struct nfs4_lock_state *lsp;
5788 struct nfs_server *server = NFS_SERVER(state->inode);
5790 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
5791 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
5792 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5794 status = nfs41_test_stateid(server,
5797 trace_nfs4_test_lock_stateid(state, lsp, status);
5798 if (status != NFS_OK) {
5799 /* Free the stateid unless the server
5800 * informs us the stateid is unrecognized. */
5801 if (status != -NFS4ERR_BAD_STATEID)
5802 nfs41_free_stateid(server,
5805 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5814 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5816 int status = NFS_OK;
5818 if (test_bit(LK_STATE_IN_USE, &state->flags))
5819 status = nfs41_check_expired_locks(state);
5820 if (status != NFS_OK)
5821 status = nfs4_lock_expired(state, request);
5826 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5828 struct nfs4_state_owner *sp = state->owner;
5829 struct nfs_inode *nfsi = NFS_I(state->inode);
5830 unsigned char fl_flags = request->fl_flags;
5832 int status = -ENOLCK;
5834 if ((fl_flags & FL_POSIX) &&
5835 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5837 /* Is this a delegated open? */
5838 status = nfs4_set_lock_state(state, request);
5841 request->fl_flags |= FL_ACCESS;
5842 status = do_vfs_lock(request->fl_file, request);
5845 down_read(&nfsi->rwsem);
5846 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
5847 /* Yes: cache locks! */
5848 /* ...but avoid races with delegation recall... */
5849 request->fl_flags = fl_flags & ~FL_SLEEP;
5850 status = do_vfs_lock(request->fl_file, request);
5853 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5854 up_read(&nfsi->rwsem);
5855 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
5858 down_read(&nfsi->rwsem);
5859 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5860 status = -NFS4ERR_DELAY;
5863 /* Note: we always want to sleep here! */
5864 request->fl_flags = fl_flags | FL_SLEEP;
5865 if (do_vfs_lock(request->fl_file, request) < 0)
5866 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5867 "manager!\n", __func__);
5869 up_read(&nfsi->rwsem);
5871 request->fl_flags = fl_flags;
5875 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5877 struct nfs4_exception exception = {
5879 .inode = state->inode,
5884 err = _nfs4_proc_setlk(state, cmd, request);
5885 trace_nfs4_set_lock(request, state, cmd, err);
5886 if (err == -NFS4ERR_DENIED)
5888 err = nfs4_handle_exception(NFS_SERVER(state->inode),
5890 } while (exception.retry);
5895 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5897 struct nfs_open_context *ctx;
5898 struct nfs4_state *state;
5899 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5902 /* verify open state */
5903 ctx = nfs_file_open_context(filp);
5906 if (request->fl_start < 0 || request->fl_end < 0)
5909 if (IS_GETLK(cmd)) {
5911 return nfs4_proc_getlk(state, F_GETLK, request);
5915 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5918 if (request->fl_type == F_UNLCK) {
5920 return nfs4_proc_unlck(state, cmd, request);
5927 * Don't rely on the VFS having checked the file open mode,
5928 * since it won't do this for flock() locks.
5930 switch (request->fl_type) {
5932 if (!(filp->f_mode & FMODE_READ))
5936 if (!(filp->f_mode & FMODE_WRITE))
5941 status = nfs4_proc_setlk(state, cmd, request);
5942 if ((status != -EAGAIN) || IS_SETLK(cmd))
5944 timeout = nfs4_set_lock_task_retry(timeout);
5945 status = -ERESTARTSYS;
5948 } while(status < 0);
5952 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
5954 struct nfs_server *server = NFS_SERVER(state->inode);
5957 err = nfs4_set_lock_state(state, fl);
5960 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
5961 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
5964 struct nfs_release_lockowner_data {
5965 struct nfs4_lock_state *lsp;
5966 struct nfs_server *server;
5967 struct nfs_release_lockowner_args args;
5968 struct nfs_release_lockowner_res res;
5969 unsigned long timestamp;
5972 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
5974 struct nfs_release_lockowner_data *data = calldata;
5975 struct nfs_server *server = data->server;
5976 nfs40_setup_sequence(server, &data->args.seq_args,
5977 &data->res.seq_res, task);
5978 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5979 data->timestamp = jiffies;
5982 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
5984 struct nfs_release_lockowner_data *data = calldata;
5985 struct nfs_server *server = data->server;
5987 nfs40_sequence_done(task, &data->res.seq_res);
5989 switch (task->tk_status) {
5991 renew_lease(server, data->timestamp);
5993 case -NFS4ERR_STALE_CLIENTID:
5994 case -NFS4ERR_EXPIRED:
5995 nfs4_schedule_lease_recovery(server->nfs_client);
5997 case -NFS4ERR_LEASE_MOVED:
5998 case -NFS4ERR_DELAY:
5999 if (nfs4_async_handle_error(task, server,
6000 NULL, NULL) == -EAGAIN)
6001 rpc_restart_call_prepare(task);
6005 static void nfs4_release_lockowner_release(void *calldata)
6007 struct nfs_release_lockowner_data *data = calldata;
6008 nfs4_free_lock_state(data->server, data->lsp);
6012 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
6013 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6014 .rpc_call_done = nfs4_release_lockowner_done,
6015 .rpc_release = nfs4_release_lockowner_release,
6019 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
6021 struct nfs_release_lockowner_data *data;
6022 struct rpc_message msg = {
6023 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6026 if (server->nfs_client->cl_mvops->minor_version != 0)
6029 data = kmalloc(sizeof(*data), GFP_NOFS);
6033 data->server = server;
6034 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6035 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6036 data->args.lock_owner.s_dev = server->s_dev;
6038 msg.rpc_argp = &data->args;
6039 msg.rpc_resp = &data->res;
6040 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
6041 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
6044 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6046 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6047 const void *buf, size_t buflen,
6048 int flags, int type)
6050 if (strcmp(key, "") != 0)
6053 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6056 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6057 void *buf, size_t buflen, int type)
6059 if (strcmp(key, "") != 0)
6062 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6065 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6066 size_t list_len, const char *name,
6067 size_t name_len, int type)
6069 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6071 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
6074 if (list && len <= list_len)
6075 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
6079 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
6080 static inline int nfs4_server_supports_labels(struct nfs_server *server)
6082 return server->caps & NFS_CAP_SECURITY_LABEL;
6085 static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6086 const void *buf, size_t buflen,
6087 int flags, int type)
6089 if (security_ismaclabel(key))
6090 return nfs4_set_security_label(dentry, buf, buflen);
6095 static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6096 void *buf, size_t buflen, int type)
6098 if (security_ismaclabel(key))
6099 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
6103 static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6104 size_t list_len, const char *name,
6105 size_t name_len, int type)
6109 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
6110 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
6111 if (list && len <= list_len)
6112 security_inode_listsecurity(dentry->d_inode, list, len);
6117 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6118 .prefix = XATTR_SECURITY_PREFIX,
6119 .list = nfs4_xattr_list_nfs4_label,
6120 .get = nfs4_xattr_get_nfs4_label,
6121 .set = nfs4_xattr_set_nfs4_label,
6127 * nfs_fhget will use either the mounted_on_fileid or the fileid
6129 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6131 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6132 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6133 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
6134 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
6137 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
6138 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
6139 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6143 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6144 const struct qstr *name,
6145 struct nfs4_fs_locations *fs_locations,
6148 struct nfs_server *server = NFS_SERVER(dir);
6150 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6152 struct nfs4_fs_locations_arg args = {
6153 .dir_fh = NFS_FH(dir),
6158 struct nfs4_fs_locations_res res = {
6159 .fs_locations = fs_locations,
6161 struct rpc_message msg = {
6162 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6168 dprintk("%s: start\n", __func__);
6170 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6171 * is not supported */
6172 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6173 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6175 bitmask[0] |= FATTR4_WORD0_FILEID;
6177 nfs_fattr_init(&fs_locations->fattr);
6178 fs_locations->server = server;
6179 fs_locations->nlocations = 0;
6180 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
6181 dprintk("%s: returned status = %d\n", __func__, status);
6185 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6186 const struct qstr *name,
6187 struct nfs4_fs_locations *fs_locations,
6190 struct nfs4_exception exception = { };
6193 err = _nfs4_proc_fs_locations(client, dir, name,
6194 fs_locations, page);
6195 trace_nfs4_get_fs_locations(dir, name, err);
6196 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6198 } while (exception.retry);
6203 * This operation also signals the server that this client is
6204 * performing migration recovery. The server can stop returning
6205 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6206 * appended to this compound to identify the client ID which is
6207 * performing recovery.
6209 static int _nfs40_proc_get_locations(struct inode *inode,
6210 struct nfs4_fs_locations *locations,
6211 struct page *page, struct rpc_cred *cred)
6213 struct nfs_server *server = NFS_SERVER(inode);
6214 struct rpc_clnt *clnt = server->client;
6216 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6218 struct nfs4_fs_locations_arg args = {
6219 .clientid = server->nfs_client->cl_clientid,
6220 .fh = NFS_FH(inode),
6223 .migration = 1, /* skip LOOKUP */
6224 .renew = 1, /* append RENEW */
6226 struct nfs4_fs_locations_res res = {
6227 .fs_locations = locations,
6231 struct rpc_message msg = {
6232 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6237 unsigned long now = jiffies;
6240 nfs_fattr_init(&locations->fattr);
6241 locations->server = server;
6242 locations->nlocations = 0;
6244 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6245 nfs4_set_sequence_privileged(&args.seq_args);
6246 status = nfs4_call_sync_sequence(clnt, server, &msg,
6247 &args.seq_args, &res.seq_res);
6251 renew_lease(server, now);
6255 #ifdef CONFIG_NFS_V4_1
6258 * This operation also signals the server that this client is
6259 * performing migration recovery. The server can stop asserting
6260 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6261 * performing this operation is identified in the SEQUENCE
6262 * operation in this compound.
6264 * When the client supports GETATTR(fs_locations_info), it can
6265 * be plumbed in here.
6267 static int _nfs41_proc_get_locations(struct inode *inode,
6268 struct nfs4_fs_locations *locations,
6269 struct page *page, struct rpc_cred *cred)
6271 struct nfs_server *server = NFS_SERVER(inode);
6272 struct rpc_clnt *clnt = server->client;
6274 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6276 struct nfs4_fs_locations_arg args = {
6277 .fh = NFS_FH(inode),
6280 .migration = 1, /* skip LOOKUP */
6282 struct nfs4_fs_locations_res res = {
6283 .fs_locations = locations,
6286 struct rpc_message msg = {
6287 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6294 nfs_fattr_init(&locations->fattr);
6295 locations->server = server;
6296 locations->nlocations = 0;
6298 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6299 nfs4_set_sequence_privileged(&args.seq_args);
6300 status = nfs4_call_sync_sequence(clnt, server, &msg,
6301 &args.seq_args, &res.seq_res);
6302 if (status == NFS4_OK &&
6303 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6304 status = -NFS4ERR_LEASE_MOVED;
6308 #endif /* CONFIG_NFS_V4_1 */
6311 * nfs4_proc_get_locations - discover locations for a migrated FSID
6312 * @inode: inode on FSID that is migrating
6313 * @locations: result of query
6315 * @cred: credential to use for this operation
6317 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6318 * operation failed, or a negative errno if a local error occurred.
6320 * On success, "locations" is filled in, but if the server has
6321 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6324 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6325 * from this client that require migration recovery.
6327 int nfs4_proc_get_locations(struct inode *inode,
6328 struct nfs4_fs_locations *locations,
6329 struct page *page, struct rpc_cred *cred)
6331 struct nfs_server *server = NFS_SERVER(inode);
6332 struct nfs_client *clp = server->nfs_client;
6333 const struct nfs4_mig_recovery_ops *ops =
6334 clp->cl_mvops->mig_recovery_ops;
6335 struct nfs4_exception exception = { };
6338 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6339 (unsigned long long)server->fsid.major,
6340 (unsigned long long)server->fsid.minor,
6342 nfs_display_fhandle(NFS_FH(inode), __func__);
6345 status = ops->get_locations(inode, locations, page, cred);
6346 if (status != -NFS4ERR_DELAY)
6348 nfs4_handle_exception(server, status, &exception);
6349 } while (exception.retry);
6354 * This operation also signals the server that this client is
6355 * performing "lease moved" recovery. The server can stop
6356 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6357 * is appended to this compound to identify the client ID which is
6358 * performing recovery.
6360 static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6362 struct nfs_server *server = NFS_SERVER(inode);
6363 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6364 struct rpc_clnt *clnt = server->client;
6365 struct nfs4_fsid_present_arg args = {
6366 .fh = NFS_FH(inode),
6367 .clientid = clp->cl_clientid,
6368 .renew = 1, /* append RENEW */
6370 struct nfs4_fsid_present_res res = {
6373 struct rpc_message msg = {
6374 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6379 unsigned long now = jiffies;
6382 res.fh = nfs_alloc_fhandle();
6386 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6387 nfs4_set_sequence_privileged(&args.seq_args);
6388 status = nfs4_call_sync_sequence(clnt, server, &msg,
6389 &args.seq_args, &res.seq_res);
6390 nfs_free_fhandle(res.fh);
6394 do_renew_lease(clp, now);
6398 #ifdef CONFIG_NFS_V4_1
6401 * This operation also signals the server that this client is
6402 * performing "lease moved" recovery. The server can stop asserting
6403 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6404 * this operation is identified in the SEQUENCE operation in this
6407 static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6409 struct nfs_server *server = NFS_SERVER(inode);
6410 struct rpc_clnt *clnt = server->client;
6411 struct nfs4_fsid_present_arg args = {
6412 .fh = NFS_FH(inode),
6414 struct nfs4_fsid_present_res res = {
6416 struct rpc_message msg = {
6417 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6424 res.fh = nfs_alloc_fhandle();
6428 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6429 nfs4_set_sequence_privileged(&args.seq_args);
6430 status = nfs4_call_sync_sequence(clnt, server, &msg,
6431 &args.seq_args, &res.seq_res);
6432 nfs_free_fhandle(res.fh);
6433 if (status == NFS4_OK &&
6434 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6435 status = -NFS4ERR_LEASE_MOVED;
6439 #endif /* CONFIG_NFS_V4_1 */
6442 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6443 * @inode: inode on FSID to check
6444 * @cred: credential to use for this operation
6446 * Server indicates whether the FSID is present, moved, or not
6447 * recognized. This operation is necessary to clear a LEASE_MOVED
6448 * condition for this client ID.
6450 * Returns NFS4_OK if the FSID is present on this server,
6451 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6452 * NFS4ERR code if some error occurred on the server, or a
6453 * negative errno if a local failure occurred.
6455 int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6457 struct nfs_server *server = NFS_SERVER(inode);
6458 struct nfs_client *clp = server->nfs_client;
6459 const struct nfs4_mig_recovery_ops *ops =
6460 clp->cl_mvops->mig_recovery_ops;
6461 struct nfs4_exception exception = { };
6464 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6465 (unsigned long long)server->fsid.major,
6466 (unsigned long long)server->fsid.minor,
6468 nfs_display_fhandle(NFS_FH(inode), __func__);
6471 status = ops->fsid_present(inode, cred);
6472 if (status != -NFS4ERR_DELAY)
6474 nfs4_handle_exception(server, status, &exception);
6475 } while (exception.retry);
6480 * If 'use_integrity' is true and the state managment nfs_client
6481 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6482 * and the machine credential as per RFC3530bis and RFC5661 Security
6483 * Considerations sections. Otherwise, just use the user cred with the
6484 * filesystem's rpc_client.
6486 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
6489 struct nfs4_secinfo_arg args = {
6490 .dir_fh = NFS_FH(dir),
6493 struct nfs4_secinfo_res res = {
6496 struct rpc_message msg = {
6497 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6501 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
6502 struct rpc_cred *cred = NULL;
6504 if (use_integrity) {
6505 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
6506 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6507 msg.rpc_cred = cred;
6510 dprintk("NFS call secinfo %s\n", name->name);
6512 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6513 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6515 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6517 dprintk("NFS reply secinfo: %d\n", status);
6525 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6526 struct nfs4_secinfo_flavors *flavors)
6528 struct nfs4_exception exception = { };
6531 err = -NFS4ERR_WRONGSEC;
6533 /* try to use integrity protection with machine cred */
6534 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6535 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6538 * if unable to use integrity protection, or SECINFO with
6539 * integrity protection returns NFS4ERR_WRONGSEC (which is
6540 * disallowed by spec, but exists in deployed servers) use
6541 * the current filesystem's rpc_client and the user cred.
6543 if (err == -NFS4ERR_WRONGSEC)
6544 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6546 trace_nfs4_secinfo(dir, name, err);
6547 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6549 } while (exception.retry);
6553 #ifdef CONFIG_NFS_V4_1
6555 * Check the exchange flags returned by the server for invalid flags, having
6556 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6559 static int nfs4_check_cl_exchange_flags(u32 flags)
6561 if (flags & ~EXCHGID4_FLAG_MASK_R)
6563 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6564 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6566 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6570 return -NFS4ERR_INVAL;
6574 nfs41_same_server_scope(struct nfs41_server_scope *a,
6575 struct nfs41_server_scope *b)
6577 if (a->server_scope_sz == b->server_scope_sz &&
6578 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6585 * nfs4_proc_bind_conn_to_session()
6587 * The 4.1 client currently uses the same TCP connection for the
6588 * fore and backchannel.
6590 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
6593 struct nfs41_bind_conn_to_session_res res;
6594 struct rpc_message msg = {
6596 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6602 dprintk("--> %s\n", __func__);
6604 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
6605 if (unlikely(res.session == NULL)) {
6610 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6611 trace_nfs4_bind_conn_to_session(clp, status);
6613 if (memcmp(res.session->sess_id.data,
6614 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6615 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6619 if (res.dir != NFS4_CDFS4_BOTH) {
6620 dprintk("NFS: %s: Unexpected direction from server\n",
6625 if (res.use_conn_in_rdma_mode) {
6626 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6635 dprintk("<-- %s status= %d\n", __func__, status);
6640 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6641 * and operations we'd like to see to enable certain features in the allow map
6643 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6644 .how = SP4_MACH_CRED,
6645 .enforce.u.words = {
6646 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6647 1 << (OP_EXCHANGE_ID - 32) |
6648 1 << (OP_CREATE_SESSION - 32) |
6649 1 << (OP_DESTROY_SESSION - 32) |
6650 1 << (OP_DESTROY_CLIENTID - 32)
6653 [0] = 1 << (OP_CLOSE) |
6656 [1] = 1 << (OP_SECINFO - 32) |
6657 1 << (OP_SECINFO_NO_NAME - 32) |
6658 1 << (OP_TEST_STATEID - 32) |
6659 1 << (OP_FREE_STATEID - 32) |
6660 1 << (OP_WRITE - 32)
6665 * Select the state protection mode for client `clp' given the server results
6666 * from exchange_id in `sp'.
6668 * Returns 0 on success, negative errno otherwise.
6670 static int nfs4_sp4_select_mode(struct nfs_client *clp,
6671 struct nfs41_state_protection *sp)
6673 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6674 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6675 1 << (OP_EXCHANGE_ID - 32) |
6676 1 << (OP_CREATE_SESSION - 32) |
6677 1 << (OP_DESTROY_SESSION - 32) |
6678 1 << (OP_DESTROY_CLIENTID - 32)
6682 if (sp->how == SP4_MACH_CRED) {
6683 /* Print state protect result */
6684 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6685 for (i = 0; i <= LAST_NFS4_OP; i++) {
6686 if (test_bit(i, sp->enforce.u.longs))
6687 dfprintk(MOUNT, " enforce op %d\n", i);
6688 if (test_bit(i, sp->allow.u.longs))
6689 dfprintk(MOUNT, " allow op %d\n", i);
6692 /* make sure nothing is on enforce list that isn't supported */
6693 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6694 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6695 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6701 * Minimal mode - state operations are allowed to use machine
6702 * credential. Note this already happens by default, so the
6703 * client doesn't have to do anything more than the negotiation.
6705 * NOTE: we don't care if EXCHANGE_ID is in the list -
6706 * we're already using the machine cred for exchange_id
6707 * and will never use a different cred.
6709 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6710 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6711 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6712 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6713 dfprintk(MOUNT, "sp4_mach_cred:\n");
6714 dfprintk(MOUNT, " minimal mode enabled\n");
6715 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6717 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6721 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6722 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6723 dfprintk(MOUNT, " cleanup mode enabled\n");
6724 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6727 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6728 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6729 dfprintk(MOUNT, " secinfo mode enabled\n");
6730 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6733 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6734 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6735 dfprintk(MOUNT, " stateid mode enabled\n");
6736 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6739 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6740 dfprintk(MOUNT, " write mode enabled\n");
6741 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6744 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6745 dfprintk(MOUNT, " commit mode enabled\n");
6746 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6754 * _nfs4_proc_exchange_id()
6756 * Wrapper for EXCHANGE_ID operation.
6758 static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6761 nfs4_verifier verifier;
6762 struct nfs41_exchange_id_args args = {
6763 .verifier = &verifier,
6765 #ifdef CONFIG_NFS_V4_1_MIGRATION
6766 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6767 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6768 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6770 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6771 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6774 struct nfs41_exchange_id_res res = {
6778 struct rpc_message msg = {
6779 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6785 nfs4_init_boot_verifier(clp, &verifier);
6786 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6788 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6789 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6790 args.id_len, args.id);
6792 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
6794 if (unlikely(res.server_owner == NULL)) {
6799 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
6801 if (unlikely(res.server_scope == NULL)) {
6803 goto out_server_owner;
6806 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
6807 if (unlikely(res.impl_id == NULL)) {
6809 goto out_server_scope;
6814 args.state_protect.how = SP4_NONE;
6818 args.state_protect = nfs4_sp4_mach_cred_request;
6825 goto out_server_scope;
6828 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6829 trace_nfs4_exchange_id(clp, status);
6831 status = nfs4_check_cl_exchange_flags(res.flags);
6834 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6837 clp->cl_clientid = res.clientid;
6838 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6839 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6840 clp->cl_seqid = res.seqid;
6842 kfree(clp->cl_serverowner);
6843 clp->cl_serverowner = res.server_owner;
6844 res.server_owner = NULL;
6846 /* use the most recent implementation id */
6847 kfree(clp->cl_implid);
6848 clp->cl_implid = res.impl_id;
6850 if (clp->cl_serverscope != NULL &&
6851 !nfs41_same_server_scope(clp->cl_serverscope,
6852 res.server_scope)) {
6853 dprintk("%s: server_scope mismatch detected\n",
6855 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
6856 kfree(clp->cl_serverscope);
6857 clp->cl_serverscope = NULL;
6860 if (clp->cl_serverscope == NULL) {
6861 clp->cl_serverscope = res.server_scope;
6868 kfree(res.server_owner);
6870 kfree(res.server_scope);
6872 if (clp->cl_implid != NULL)
6873 dprintk("NFS reply exchange_id: Server Implementation ID: "
6874 "domain: %s, name: %s, date: %llu,%u\n",
6875 clp->cl_implid->domain, clp->cl_implid->name,
6876 clp->cl_implid->date.seconds,
6877 clp->cl_implid->date.nseconds);
6878 dprintk("NFS reply exchange_id: %d\n", status);
6883 * nfs4_proc_exchange_id()
6885 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6887 * Since the clientid has expired, all compounds using sessions
6888 * associated with the stale clientid will be returning
6889 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6890 * be in some phase of session reset.
6892 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6894 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6896 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6899 /* try SP4_MACH_CRED if krb5i/p */
6900 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6901 authflavor == RPC_AUTH_GSS_KRB5P) {
6902 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6908 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6911 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6912 struct rpc_cred *cred)
6914 struct rpc_message msg = {
6915 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6921 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6922 trace_nfs4_destroy_clientid(clp, status);
6924 dprintk("NFS: Got error %d from the server %s on "
6925 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6929 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6930 struct rpc_cred *cred)
6935 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6936 ret = _nfs4_proc_destroy_clientid(clp, cred);
6938 case -NFS4ERR_DELAY:
6939 case -NFS4ERR_CLIENTID_BUSY:
6949 int nfs4_destroy_clientid(struct nfs_client *clp)
6951 struct rpc_cred *cred;
6954 if (clp->cl_mvops->minor_version < 1)
6956 if (clp->cl_exchange_flags == 0)
6958 if (clp->cl_preserve_clid)
6960 cred = nfs4_get_clid_cred(clp);
6961 ret = nfs4_proc_destroy_clientid(clp, cred);
6966 case -NFS4ERR_STALE_CLIENTID:
6967 clp->cl_exchange_flags = 0;
6973 struct nfs4_get_lease_time_data {
6974 struct nfs4_get_lease_time_args *args;
6975 struct nfs4_get_lease_time_res *res;
6976 struct nfs_client *clp;
6979 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6982 struct nfs4_get_lease_time_data *data =
6983 (struct nfs4_get_lease_time_data *)calldata;
6985 dprintk("--> %s\n", __func__);
6986 /* just setup sequence, do not trigger session recovery
6987 since we're invoked within one */
6988 nfs41_setup_sequence(data->clp->cl_session,
6989 &data->args->la_seq_args,
6990 &data->res->lr_seq_res,
6992 dprintk("<-- %s\n", __func__);
6996 * Called from nfs4_state_manager thread for session setup, so don't recover
6997 * from sequence operation or clientid errors.
6999 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7001 struct nfs4_get_lease_time_data *data =
7002 (struct nfs4_get_lease_time_data *)calldata;
7004 dprintk("--> %s\n", __func__);
7005 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7007 switch (task->tk_status) {
7008 case -NFS4ERR_DELAY:
7009 case -NFS4ERR_GRACE:
7010 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7011 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7012 task->tk_status = 0;
7014 case -NFS4ERR_RETRY_UNCACHED_REP:
7015 rpc_restart_call_prepare(task);
7018 dprintk("<-- %s\n", __func__);
7021 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
7022 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7023 .rpc_call_done = nfs4_get_lease_time_done,
7026 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7028 struct rpc_task *task;
7029 struct nfs4_get_lease_time_args args;
7030 struct nfs4_get_lease_time_res res = {
7031 .lr_fsinfo = fsinfo,
7033 struct nfs4_get_lease_time_data data = {
7038 struct rpc_message msg = {
7039 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7043 struct rpc_task_setup task_setup = {
7044 .rpc_client = clp->cl_rpcclient,
7045 .rpc_message = &msg,
7046 .callback_ops = &nfs4_get_lease_time_ops,
7047 .callback_data = &data,
7048 .flags = RPC_TASK_TIMEOUT,
7052 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
7053 nfs4_set_sequence_privileged(&args.la_seq_args);
7054 dprintk("--> %s\n", __func__);
7055 task = rpc_run_task(&task_setup);
7058 status = PTR_ERR(task);
7060 status = task->tk_status;
7063 dprintk("<-- %s return %d\n", __func__, status);
7069 * Initialize the values to be used by the client in CREATE_SESSION
7070 * If nfs4_init_session set the fore channel request and response sizes,
7073 * Set the back channel max_resp_sz_cached to zero to force the client to
7074 * always set csa_cachethis to FALSE because the current implementation
7075 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7077 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7079 unsigned int max_rqst_sz, max_resp_sz;
7081 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7082 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
7084 /* Fore channel attributes */
7085 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7086 args->fc_attrs.max_resp_sz = max_resp_sz;
7087 args->fc_attrs.max_ops = NFS4_MAX_OPS;
7088 args->fc_attrs.max_reqs = max_session_slots;
7090 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
7091 "max_ops=%u max_reqs=%u\n",
7093 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
7094 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
7096 /* Back channel attributes */
7097 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7098 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7099 args->bc_attrs.max_resp_sz_cached = 0;
7100 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7101 args->bc_attrs.max_reqs = 1;
7103 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7104 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7106 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7107 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7108 args->bc_attrs.max_reqs);
7111 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
7113 struct nfs4_channel_attrs *sent = &args->fc_attrs;
7114 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
7116 if (rcvd->max_resp_sz > sent->max_resp_sz)
7119 * Our requested max_ops is the minimum we need; we're not
7120 * prepared to break up compounds into smaller pieces than that.
7121 * So, no point even trying to continue if the server won't
7124 if (rcvd->max_ops < sent->max_ops)
7126 if (rcvd->max_reqs == 0)
7128 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7129 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
7133 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
7135 struct nfs4_channel_attrs *sent = &args->bc_attrs;
7136 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
7138 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7140 if (rcvd->max_resp_sz < sent->max_resp_sz)
7142 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7144 /* These would render the backchannel useless: */
7145 if (rcvd->max_ops != sent->max_ops)
7147 if (rcvd->max_reqs != sent->max_reqs)
7152 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7153 struct nfs4_session *session)
7157 ret = nfs4_verify_fore_channel_attrs(args, session);
7160 return nfs4_verify_back_channel_attrs(args, session);
7163 static int _nfs4_proc_create_session(struct nfs_client *clp,
7164 struct rpc_cred *cred)
7166 struct nfs4_session *session = clp->cl_session;
7167 struct nfs41_create_session_args args = {
7169 .cb_program = NFS4_CALLBACK,
7171 struct nfs41_create_session_res res = {
7174 struct rpc_message msg = {
7175 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7182 nfs4_init_channel_attrs(&args);
7183 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
7185 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7186 trace_nfs4_create_session(clp, status);
7189 /* Verify the session's negotiated channel_attrs values */
7190 status = nfs4_verify_channel_attrs(&args, session);
7191 /* Increment the clientid slot sequence id */
7199 * Issues a CREATE_SESSION operation to the server.
7200 * It is the responsibility of the caller to verify the session is
7201 * expired before calling this routine.
7203 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
7207 struct nfs4_session *session = clp->cl_session;
7209 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7211 status = _nfs4_proc_create_session(clp, cred);
7215 /* Init or reset the session slot tables */
7216 status = nfs4_setup_session_slot_tables(session);
7217 dprintk("slot table setup returned %d\n", status);
7221 ptr = (unsigned *)&session->sess_id.data[0];
7222 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7223 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
7225 dprintk("<-- %s\n", __func__);
7230 * Issue the over-the-wire RPC DESTROY_SESSION.
7231 * The caller must serialize access to this routine.
7233 int nfs4_proc_destroy_session(struct nfs4_session *session,
7234 struct rpc_cred *cred)
7236 struct rpc_message msg = {
7237 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7238 .rpc_argp = session,
7243 dprintk("--> nfs4_proc_destroy_session\n");
7245 /* session is still being setup */
7246 if (session->clp->cl_cons_state != NFS_CS_READY)
7249 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7250 trace_nfs4_destroy_session(session->clp, status);
7253 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
7254 "Session has been destroyed regardless...\n", status);
7256 dprintk("<-- nfs4_proc_destroy_session\n");
7261 * Renew the cl_session lease.
7263 struct nfs4_sequence_data {
7264 struct nfs_client *clp;
7265 struct nfs4_sequence_args args;
7266 struct nfs4_sequence_res res;
7269 static void nfs41_sequence_release(void *data)
7271 struct nfs4_sequence_data *calldata = data;
7272 struct nfs_client *clp = calldata->clp;
7274 if (atomic_read(&clp->cl_count) > 1)
7275 nfs4_schedule_state_renewal(clp);
7276 nfs_put_client(clp);
7280 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7282 switch(task->tk_status) {
7283 case -NFS4ERR_DELAY:
7284 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7287 nfs4_schedule_lease_recovery(clp);
7292 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
7294 struct nfs4_sequence_data *calldata = data;
7295 struct nfs_client *clp = calldata->clp;
7297 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7300 trace_nfs4_sequence(clp, task->tk_status);
7301 if (task->tk_status < 0) {
7302 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7303 if (atomic_read(&clp->cl_count) == 1)
7306 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7307 rpc_restart_call_prepare(task);
7311 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7313 dprintk("<-- %s\n", __func__);
7316 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7318 struct nfs4_sequence_data *calldata = data;
7319 struct nfs_client *clp = calldata->clp;
7320 struct nfs4_sequence_args *args;
7321 struct nfs4_sequence_res *res;
7323 args = task->tk_msg.rpc_argp;
7324 res = task->tk_msg.rpc_resp;
7326 nfs41_setup_sequence(clp->cl_session, args, res, task);
7329 static const struct rpc_call_ops nfs41_sequence_ops = {
7330 .rpc_call_done = nfs41_sequence_call_done,
7331 .rpc_call_prepare = nfs41_sequence_prepare,
7332 .rpc_release = nfs41_sequence_release,
7335 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7336 struct rpc_cred *cred,
7339 struct nfs4_sequence_data *calldata;
7340 struct rpc_message msg = {
7341 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7344 struct rpc_task_setup task_setup_data = {
7345 .rpc_client = clp->cl_rpcclient,
7346 .rpc_message = &msg,
7347 .callback_ops = &nfs41_sequence_ops,
7348 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
7351 if (!atomic_inc_not_zero(&clp->cl_count))
7352 return ERR_PTR(-EIO);
7353 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7354 if (calldata == NULL) {
7355 nfs_put_client(clp);
7356 return ERR_PTR(-ENOMEM);
7358 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
7360 nfs4_set_sequence_privileged(&calldata->args);
7361 msg.rpc_argp = &calldata->args;
7362 msg.rpc_resp = &calldata->res;
7363 calldata->clp = clp;
7364 task_setup_data.callback_data = calldata;
7366 return rpc_run_task(&task_setup_data);
7369 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
7371 struct rpc_task *task;
7374 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
7376 task = _nfs41_proc_sequence(clp, cred, false);
7378 ret = PTR_ERR(task);
7380 rpc_put_task_async(task);
7381 dprintk("<-- %s status=%d\n", __func__, ret);
7385 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7387 struct rpc_task *task;
7390 task = _nfs41_proc_sequence(clp, cred, true);
7392 ret = PTR_ERR(task);
7395 ret = rpc_wait_for_completion_task(task);
7397 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7399 if (task->tk_status == 0)
7400 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
7401 ret = task->tk_status;
7405 dprintk("<-- %s status=%d\n", __func__, ret);
7409 struct nfs4_reclaim_complete_data {
7410 struct nfs_client *clp;
7411 struct nfs41_reclaim_complete_args arg;
7412 struct nfs41_reclaim_complete_res res;
7415 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7417 struct nfs4_reclaim_complete_data *calldata = data;
7419 nfs41_setup_sequence(calldata->clp->cl_session,
7420 &calldata->arg.seq_args,
7421 &calldata->res.seq_res,
7425 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7427 switch(task->tk_status) {
7429 case -NFS4ERR_COMPLETE_ALREADY:
7430 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7432 case -NFS4ERR_DELAY:
7433 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7435 case -NFS4ERR_RETRY_UNCACHED_REP:
7438 nfs4_schedule_lease_recovery(clp);
7443 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7445 struct nfs4_reclaim_complete_data *calldata = data;
7446 struct nfs_client *clp = calldata->clp;
7447 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7449 dprintk("--> %s\n", __func__);
7450 if (!nfs41_sequence_done(task, res))
7453 trace_nfs4_reclaim_complete(clp, task->tk_status);
7454 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7455 rpc_restart_call_prepare(task);
7458 dprintk("<-- %s\n", __func__);
7461 static void nfs4_free_reclaim_complete_data(void *data)
7463 struct nfs4_reclaim_complete_data *calldata = data;
7468 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7469 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7470 .rpc_call_done = nfs4_reclaim_complete_done,
7471 .rpc_release = nfs4_free_reclaim_complete_data,
7475 * Issue a global reclaim complete.
7477 static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7478 struct rpc_cred *cred)
7480 struct nfs4_reclaim_complete_data *calldata;
7481 struct rpc_task *task;
7482 struct rpc_message msg = {
7483 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
7486 struct rpc_task_setup task_setup_data = {
7487 .rpc_client = clp->cl_rpcclient,
7488 .rpc_message = &msg,
7489 .callback_ops = &nfs4_reclaim_complete_call_ops,
7490 .flags = RPC_TASK_ASYNC,
7492 int status = -ENOMEM;
7494 dprintk("--> %s\n", __func__);
7495 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7496 if (calldata == NULL)
7498 calldata->clp = clp;
7499 calldata->arg.one_fs = 0;
7501 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
7502 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
7503 msg.rpc_argp = &calldata->arg;
7504 msg.rpc_resp = &calldata->res;
7505 task_setup_data.callback_data = calldata;
7506 task = rpc_run_task(&task_setup_data);
7508 status = PTR_ERR(task);
7511 status = nfs4_wait_for_completion_rpc_task(task);
7513 status = task->tk_status;
7517 dprintk("<-- %s status=%d\n", __func__, status);
7522 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7524 struct nfs4_layoutget *lgp = calldata;
7525 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
7526 struct nfs4_session *session = nfs4_get_session(server);
7528 dprintk("--> %s\n", __func__);
7529 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7530 * right now covering the LAYOUTGET we are about to send.
7531 * However, that is not so catastrophic, and there seems
7532 * to be no way to prevent it completely.
7534 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
7535 &lgp->res.seq_res, task))
7537 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7538 NFS_I(lgp->args.inode)->layout,
7539 lgp->args.ctx->state)) {
7540 rpc_exit(task, NFS4_OK);
7544 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7546 struct nfs4_layoutget *lgp = calldata;
7547 struct inode *inode = lgp->args.inode;
7548 struct nfs_server *server = NFS_SERVER(inode);
7549 struct pnfs_layout_hdr *lo;
7550 struct nfs4_state *state = NULL;
7551 unsigned long timeo, now, giveup;
7553 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
7555 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
7558 switch (task->tk_status) {
7562 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7563 * (or clients) writing to the same RAID stripe
7565 case -NFS4ERR_LAYOUTTRYLATER:
7567 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7568 * existing layout before getting a new one).
7570 case -NFS4ERR_RECALLCONFLICT:
7571 timeo = rpc_get_timeout(task->tk_client);
7572 giveup = lgp->args.timestamp + timeo;
7574 if (time_after(giveup, now)) {
7575 unsigned long delay;
7578 * - Not less then NFS4_POLL_RETRY_MIN.
7579 * - One last time a jiffie before we give up
7580 * - exponential backoff (time_now minus start_attempt)
7582 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7583 min((giveup - now - 1),
7584 now - lgp->args.timestamp));
7586 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7588 rpc_delay(task, delay);
7589 task->tk_status = 0;
7590 rpc_restart_call_prepare(task);
7591 goto out; /* Do not call nfs4_async_handle_error() */
7594 case -NFS4ERR_EXPIRED:
7595 case -NFS4ERR_BAD_STATEID:
7596 spin_lock(&inode->i_lock);
7597 lo = NFS_I(inode)->layout;
7598 if (!lo || list_empty(&lo->plh_segs)) {
7599 spin_unlock(&inode->i_lock);
7600 /* If the open stateid was bad, then recover it. */
7601 state = lgp->args.ctx->state;
7606 * Mark the bad layout state as invalid, then retry
7607 * with the current stateid.
7609 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7610 spin_unlock(&inode->i_lock);
7611 pnfs_free_lseg_list(&head);
7613 task->tk_status = 0;
7614 rpc_restart_call_prepare(task);
7617 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN)
7618 rpc_restart_call_prepare(task);
7620 dprintk("<-- %s\n", __func__);
7623 static size_t max_response_pages(struct nfs_server *server)
7625 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7626 return nfs_page_array_len(0, max_resp_sz);
7629 static void nfs4_free_pages(struct page **pages, size_t size)
7636 for (i = 0; i < size; i++) {
7639 __free_page(pages[i]);
7644 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7646 struct page **pages;
7649 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7651 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7655 for (i = 0; i < size; i++) {
7656 pages[i] = alloc_page(gfp_flags);
7658 dprintk("%s: failed to allocate page\n", __func__);
7659 nfs4_free_pages(pages, size);
7667 static void nfs4_layoutget_release(void *calldata)
7669 struct nfs4_layoutget *lgp = calldata;
7670 struct inode *inode = lgp->args.inode;
7671 struct nfs_server *server = NFS_SERVER(inode);
7672 size_t max_pages = max_response_pages(server);
7674 dprintk("--> %s\n", __func__);
7675 nfs4_free_pages(lgp->args.layout.pages, max_pages);
7676 pnfs_put_layout_hdr(NFS_I(inode)->layout);
7677 put_nfs_open_context(lgp->args.ctx);
7679 dprintk("<-- %s\n", __func__);
7682 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7683 .rpc_call_prepare = nfs4_layoutget_prepare,
7684 .rpc_call_done = nfs4_layoutget_done,
7685 .rpc_release = nfs4_layoutget_release,
7688 struct pnfs_layout_segment *
7689 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
7691 struct inode *inode = lgp->args.inode;
7692 struct nfs_server *server = NFS_SERVER(inode);
7693 size_t max_pages = max_response_pages(server);
7694 struct rpc_task *task;
7695 struct rpc_message msg = {
7696 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7697 .rpc_argp = &lgp->args,
7698 .rpc_resp = &lgp->res,
7699 .rpc_cred = lgp->cred,
7701 struct rpc_task_setup task_setup_data = {
7702 .rpc_client = server->client,
7703 .rpc_message = &msg,
7704 .callback_ops = &nfs4_layoutget_call_ops,
7705 .callback_data = lgp,
7706 .flags = RPC_TASK_ASYNC,
7708 struct pnfs_layout_segment *lseg = NULL;
7711 dprintk("--> %s\n", __func__);
7713 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7714 if (!lgp->args.layout.pages) {
7715 nfs4_layoutget_release(lgp);
7716 return ERR_PTR(-ENOMEM);
7718 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
7719 lgp->args.timestamp = jiffies;
7721 lgp->res.layoutp = &lgp->args.layout;
7722 lgp->res.seq_res.sr_slot = NULL;
7723 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
7725 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7726 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7728 task = rpc_run_task(&task_setup_data);
7730 return ERR_CAST(task);
7731 status = nfs4_wait_for_completion_rpc_task(task);
7733 status = task->tk_status;
7734 trace_nfs4_layoutget(lgp->args.ctx,
7738 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7739 if (status == 0 && lgp->res.layoutp->len)
7740 lseg = pnfs_layout_process(lgp);
7742 dprintk("<-- %s status=%d\n", __func__, status);
7744 return ERR_PTR(status);
7749 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7751 struct nfs4_layoutreturn *lrp = calldata;
7753 dprintk("--> %s\n", __func__);
7754 nfs41_setup_sequence(lrp->clp->cl_session,
7755 &lrp->args.seq_args,
7760 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7762 struct nfs4_layoutreturn *lrp = calldata;
7763 struct nfs_server *server;
7765 dprintk("--> %s\n", __func__);
7767 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
7770 server = NFS_SERVER(lrp->args.inode);
7771 switch (task->tk_status) {
7773 task->tk_status = 0;
7776 case -NFS4ERR_DELAY:
7777 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
7779 rpc_restart_call_prepare(task);
7782 dprintk("<-- %s\n", __func__);
7785 static void nfs4_layoutreturn_release(void *calldata)
7787 struct nfs4_layoutreturn *lrp = calldata;
7788 struct pnfs_layout_hdr *lo = lrp->args.layout;
7790 dprintk("--> %s\n", __func__);
7791 spin_lock(&lo->plh_inode->i_lock);
7792 if (lrp->res.lrs_present)
7793 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7794 lo->plh_block_lgets--;
7795 spin_unlock(&lo->plh_inode->i_lock);
7796 pnfs_put_layout_hdr(lrp->args.layout);
7798 dprintk("<-- %s\n", __func__);
7801 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7802 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7803 .rpc_call_done = nfs4_layoutreturn_done,
7804 .rpc_release = nfs4_layoutreturn_release,
7807 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
7809 struct rpc_task *task;
7810 struct rpc_message msg = {
7811 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7812 .rpc_argp = &lrp->args,
7813 .rpc_resp = &lrp->res,
7814 .rpc_cred = lrp->cred,
7816 struct rpc_task_setup task_setup_data = {
7817 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
7818 .rpc_message = &msg,
7819 .callback_ops = &nfs4_layoutreturn_call_ops,
7820 .callback_data = lrp,
7824 dprintk("--> %s\n", __func__);
7825 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
7826 task = rpc_run_task(&task_setup_data);
7828 return PTR_ERR(task);
7829 status = task->tk_status;
7830 trace_nfs4_layoutreturn(lrp->args.inode, status);
7831 dprintk("<-- %s status=%d\n", __func__, status);
7837 _nfs4_proc_getdeviceinfo(struct nfs_server *server,
7838 struct pnfs_device *pdev,
7839 struct rpc_cred *cred)
7841 struct nfs4_getdeviceinfo_args args = {
7844 struct nfs4_getdeviceinfo_res res = {
7847 struct rpc_message msg = {
7848 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7855 dprintk("--> %s\n", __func__);
7856 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
7857 dprintk("<-- %s status=%d\n", __func__, status);
7862 int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7863 struct pnfs_device *pdev,
7864 struct rpc_cred *cred)
7866 struct nfs4_exception exception = { };
7870 err = nfs4_handle_exception(server,
7871 _nfs4_proc_getdeviceinfo(server, pdev, cred),
7873 } while (exception.retry);
7876 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7878 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7880 struct nfs4_layoutcommit_data *data = calldata;
7881 struct nfs_server *server = NFS_SERVER(data->args.inode);
7882 struct nfs4_session *session = nfs4_get_session(server);
7884 nfs41_setup_sequence(session,
7885 &data->args.seq_args,
7891 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7893 struct nfs4_layoutcommit_data *data = calldata;
7894 struct nfs_server *server = NFS_SERVER(data->args.inode);
7896 if (!nfs41_sequence_done(task, &data->res.seq_res))
7899 switch (task->tk_status) { /* Just ignore these failures */
7900 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7901 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7902 case -NFS4ERR_BADLAYOUT: /* no layout */
7903 case -NFS4ERR_GRACE: /* loca_recalim always false */
7904 task->tk_status = 0;
7908 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
7909 rpc_restart_call_prepare(task);
7915 static void nfs4_layoutcommit_release(void *calldata)
7917 struct nfs4_layoutcommit_data *data = calldata;
7919 pnfs_cleanup_layoutcommit(data);
7920 nfs_post_op_update_inode_force_wcc(data->args.inode,
7922 put_rpccred(data->cred);
7926 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7927 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7928 .rpc_call_done = nfs4_layoutcommit_done,
7929 .rpc_release = nfs4_layoutcommit_release,
7933 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
7935 struct rpc_message msg = {
7936 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7937 .rpc_argp = &data->args,
7938 .rpc_resp = &data->res,
7939 .rpc_cred = data->cred,
7941 struct rpc_task_setup task_setup_data = {
7942 .task = &data->task,
7943 .rpc_client = NFS_CLIENT(data->args.inode),
7944 .rpc_message = &msg,
7945 .callback_ops = &nfs4_layoutcommit_ops,
7946 .callback_data = data,
7947 .flags = RPC_TASK_ASYNC,
7949 struct rpc_task *task;
7952 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7953 "lbw: %llu inode %lu\n",
7954 data->task.tk_pid, sync,
7955 data->args.lastbytewritten,
7956 data->args.inode->i_ino);
7958 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
7959 task = rpc_run_task(&task_setup_data);
7961 return PTR_ERR(task);
7964 status = nfs4_wait_for_completion_rpc_task(task);
7967 status = task->tk_status;
7968 trace_nfs4_layoutcommit(data->args.inode, status);
7970 dprintk("%s: status %d\n", __func__, status);
7976 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7977 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7980 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7981 struct nfs_fsinfo *info,
7982 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
7984 struct nfs41_secinfo_no_name_args args = {
7985 .style = SECINFO_STYLE_CURRENT_FH,
7987 struct nfs4_secinfo_res res = {
7990 struct rpc_message msg = {
7991 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
7995 struct rpc_clnt *clnt = server->client;
7996 struct rpc_cred *cred = NULL;
7999 if (use_integrity) {
8000 clnt = server->nfs_client->cl_rpcclient;
8001 cred = nfs4_get_clid_cred(server->nfs_client);
8002 msg.rpc_cred = cred;
8005 dprintk("--> %s\n", __func__);
8006 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8008 dprintk("<-- %s status=%d\n", __func__, status);
8017 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8018 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8020 struct nfs4_exception exception = { };
8023 /* first try using integrity protection */
8024 err = -NFS4ERR_WRONGSEC;
8026 /* try to use integrity protection with machine cred */
8027 if (_nfs4_is_integrity_protected(server->nfs_client))
8028 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8032 * if unable to use integrity protection, or SECINFO with
8033 * integrity protection returns NFS4ERR_WRONGSEC (which is
8034 * disallowed by spec, but exists in deployed servers) use
8035 * the current filesystem's rpc_client and the user cred.
8037 if (err == -NFS4ERR_WRONGSEC)
8038 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8043 case -NFS4ERR_WRONGSEC:
8047 err = nfs4_handle_exception(server, err, &exception);
8049 } while (exception.retry);
8055 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8056 struct nfs_fsinfo *info)
8060 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
8061 struct nfs4_secinfo_flavors *flavors;
8062 struct nfs4_secinfo4 *secinfo;
8065 page = alloc_page(GFP_KERNEL);
8071 flavors = page_address(page);
8072 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8075 * Fall back on "guess and check" method if
8076 * the server doesn't support SECINFO_NO_NAME
8078 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
8079 err = nfs4_find_root_sec(server, fhandle, info);
8085 for (i = 0; i < flavors->num_flavors; i++) {
8086 secinfo = &flavors->flavors[i];
8088 switch (secinfo->flavor) {
8092 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8093 &secinfo->flavor_info);
8096 flavor = RPC_AUTH_MAXFLAVOR;
8100 if (!nfs_auth_info_match(&server->auth_info, flavor))
8101 flavor = RPC_AUTH_MAXFLAVOR;
8103 if (flavor != RPC_AUTH_MAXFLAVOR) {
8104 err = nfs4_lookup_root_sec(server, fhandle,
8111 if (flavor == RPC_AUTH_MAXFLAVOR)
8122 static int _nfs41_test_stateid(struct nfs_server *server,
8123 nfs4_stateid *stateid,
8124 struct rpc_cred *cred)
8127 struct nfs41_test_stateid_args args = {
8130 struct nfs41_test_stateid_res res;
8131 struct rpc_message msg = {
8132 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8137 struct rpc_clnt *rpc_client = server->client;
8139 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8142 dprintk("NFS call test_stateid %p\n", stateid);
8143 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8144 nfs4_set_sequence_privileged(&args.seq_args);
8145 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8146 &args.seq_args, &res.seq_res);
8147 if (status != NFS_OK) {
8148 dprintk("NFS reply test_stateid: failed, %d\n", status);
8151 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
8156 * nfs41_test_stateid - perform a TEST_STATEID operation
8158 * @server: server / transport on which to perform the operation
8159 * @stateid: state ID to test
8162 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8163 * Otherwise a negative NFS4ERR value is returned if the operation
8164 * failed or the state ID is not currently valid.
8166 static int nfs41_test_stateid(struct nfs_server *server,
8167 nfs4_stateid *stateid,
8168 struct rpc_cred *cred)
8170 struct nfs4_exception exception = { };
8173 err = _nfs41_test_stateid(server, stateid, cred);
8174 if (err != -NFS4ERR_DELAY)
8176 nfs4_handle_exception(server, err, &exception);
8177 } while (exception.retry);
8181 struct nfs_free_stateid_data {
8182 struct nfs_server *server;
8183 struct nfs41_free_stateid_args args;
8184 struct nfs41_free_stateid_res res;
8187 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8189 struct nfs_free_stateid_data *data = calldata;
8190 nfs41_setup_sequence(nfs4_get_session(data->server),
8191 &data->args.seq_args,
8196 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8198 struct nfs_free_stateid_data *data = calldata;
8200 nfs41_sequence_done(task, &data->res.seq_res);
8202 switch (task->tk_status) {
8203 case -NFS4ERR_DELAY:
8204 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
8205 rpc_restart_call_prepare(task);
8209 static void nfs41_free_stateid_release(void *calldata)
8214 static const struct rpc_call_ops nfs41_free_stateid_ops = {
8215 .rpc_call_prepare = nfs41_free_stateid_prepare,
8216 .rpc_call_done = nfs41_free_stateid_done,
8217 .rpc_release = nfs41_free_stateid_release,
8220 static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8221 nfs4_stateid *stateid,
8222 struct rpc_cred *cred,
8225 struct rpc_message msg = {
8226 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
8229 struct rpc_task_setup task_setup = {
8230 .rpc_client = server->client,
8231 .rpc_message = &msg,
8232 .callback_ops = &nfs41_free_stateid_ops,
8233 .flags = RPC_TASK_ASYNC,
8235 struct nfs_free_stateid_data *data;
8237 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8238 &task_setup.rpc_client, &msg);
8240 dprintk("NFS call free_stateid %p\n", stateid);
8241 data = kmalloc(sizeof(*data), GFP_NOFS);
8243 return ERR_PTR(-ENOMEM);
8244 data->server = server;
8245 nfs4_stateid_copy(&data->args.stateid, stateid);
8247 task_setup.callback_data = data;
8249 msg.rpc_argp = &data->args;
8250 msg.rpc_resp = &data->res;
8251 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
8253 nfs4_set_sequence_privileged(&data->args.seq_args);
8255 return rpc_run_task(&task_setup);
8259 * nfs41_free_stateid - perform a FREE_STATEID operation
8261 * @server: server / transport on which to perform the operation
8262 * @stateid: state ID to release
8265 * Returns NFS_OK if the server freed "stateid". Otherwise a
8266 * negative NFS4ERR value is returned.
8268 static int nfs41_free_stateid(struct nfs_server *server,
8269 nfs4_stateid *stateid,
8270 struct rpc_cred *cred)
8272 struct rpc_task *task;
8275 task = _nfs41_free_stateid(server, stateid, cred, true);
8277 return PTR_ERR(task);
8278 ret = rpc_wait_for_completion_task(task);
8280 ret = task->tk_status;
8286 nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
8288 struct rpc_task *task;
8289 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
8291 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
8292 nfs4_free_lock_state(server, lsp);
8298 static bool nfs41_match_stateid(const nfs4_stateid *s1,
8299 const nfs4_stateid *s2)
8301 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
8304 if (s1->seqid == s2->seqid)
8306 if (s1->seqid == 0 || s2->seqid == 0)
8312 #endif /* CONFIG_NFS_V4_1 */
8314 static bool nfs4_match_stateid(const nfs4_stateid *s1,
8315 const nfs4_stateid *s2)
8317 return nfs4_stateid_match(s1, s2);
8321 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
8322 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8323 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8324 .recover_open = nfs4_open_reclaim,
8325 .recover_lock = nfs4_lock_reclaim,
8326 .establish_clid = nfs4_init_clientid,
8327 .detect_trunking = nfs40_discover_server_trunking,
8330 #if defined(CONFIG_NFS_V4_1)
8331 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
8332 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8333 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8334 .recover_open = nfs4_open_reclaim,
8335 .recover_lock = nfs4_lock_reclaim,
8336 .establish_clid = nfs41_init_clientid,
8337 .reclaim_complete = nfs41_proc_reclaim_complete,
8338 .detect_trunking = nfs41_discover_server_trunking,
8340 #endif /* CONFIG_NFS_V4_1 */
8342 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
8343 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8344 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8345 .recover_open = nfs4_open_expired,
8346 .recover_lock = nfs4_lock_expired,
8347 .establish_clid = nfs4_init_clientid,
8350 #if defined(CONFIG_NFS_V4_1)
8351 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
8352 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8353 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8354 .recover_open = nfs41_open_expired,
8355 .recover_lock = nfs41_lock_expired,
8356 .establish_clid = nfs41_init_clientid,
8358 #endif /* CONFIG_NFS_V4_1 */
8360 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
8361 .sched_state_renewal = nfs4_proc_async_renew,
8362 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8363 .renew_lease = nfs4_proc_renew,
8366 #if defined(CONFIG_NFS_V4_1)
8367 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
8368 .sched_state_renewal = nfs41_proc_async_sequence,
8369 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8370 .renew_lease = nfs4_proc_sequence,
8374 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
8375 .get_locations = _nfs40_proc_get_locations,
8376 .fsid_present = _nfs40_proc_fsid_present,
8379 #if defined(CONFIG_NFS_V4_1)
8380 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
8381 .get_locations = _nfs41_proc_get_locations,
8382 .fsid_present = _nfs41_proc_fsid_present,
8384 #endif /* CONFIG_NFS_V4_1 */
8386 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8388 .init_caps = NFS_CAP_READDIRPLUS
8389 | NFS_CAP_ATOMIC_OPEN
8390 | NFS_CAP_CHANGE_ATTR
8391 | NFS_CAP_POSIX_LOCK,
8392 .init_client = nfs40_init_client,
8393 .shutdown_client = nfs40_shutdown_client,
8394 .match_stateid = nfs4_match_stateid,
8395 .find_root_sec = nfs4_find_root_sec,
8396 .free_lock_state = nfs4_release_lockowner,
8397 .call_sync_ops = &nfs40_call_sync_ops,
8398 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8399 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8400 .state_renewal_ops = &nfs40_state_renewal_ops,
8401 .mig_recovery_ops = &nfs40_mig_recovery_ops,
8404 #if defined(CONFIG_NFS_V4_1)
8405 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8407 .init_caps = NFS_CAP_READDIRPLUS
8408 | NFS_CAP_ATOMIC_OPEN
8409 | NFS_CAP_CHANGE_ATTR
8410 | NFS_CAP_POSIX_LOCK
8411 | NFS_CAP_STATEID_NFSV41
8412 | NFS_CAP_ATOMIC_OPEN_V1,
8413 .init_client = nfs41_init_client,
8414 .shutdown_client = nfs41_shutdown_client,
8415 .match_stateid = nfs41_match_stateid,
8416 .find_root_sec = nfs41_find_root_sec,
8417 .free_lock_state = nfs41_free_lock_state,
8418 .call_sync_ops = &nfs41_call_sync_ops,
8419 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8420 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8421 .state_renewal_ops = &nfs41_state_renewal_ops,
8422 .mig_recovery_ops = &nfs41_mig_recovery_ops,
8426 #if defined(CONFIG_NFS_V4_2)
8427 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8429 .init_caps = NFS_CAP_READDIRPLUS
8430 | NFS_CAP_ATOMIC_OPEN
8431 | NFS_CAP_CHANGE_ATTR
8432 | NFS_CAP_POSIX_LOCK
8433 | NFS_CAP_STATEID_NFSV41
8434 | NFS_CAP_ATOMIC_OPEN_V1,
8435 .init_client = nfs41_init_client,
8436 .shutdown_client = nfs41_shutdown_client,
8437 .match_stateid = nfs41_match_stateid,
8438 .find_root_sec = nfs41_find_root_sec,
8439 .free_lock_state = nfs41_free_lock_state,
8440 .call_sync_ops = &nfs41_call_sync_ops,
8441 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8442 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8443 .state_renewal_ops = &nfs41_state_renewal_ops,
8447 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8448 [0] = &nfs_v4_0_minor_ops,
8449 #if defined(CONFIG_NFS_V4_1)
8450 [1] = &nfs_v4_1_minor_ops,
8452 #if defined(CONFIG_NFS_V4_2)
8453 [2] = &nfs_v4_2_minor_ops,
8457 static const struct inode_operations nfs4_dir_inode_operations = {
8458 .create = nfs_create,
8459 .lookup = nfs_lookup,
8460 .atomic_open = nfs_atomic_open,
8462 .unlink = nfs_unlink,
8463 .symlink = nfs_symlink,
8467 .rename = nfs_rename,
8468 .permission = nfs_permission,
8469 .getattr = nfs_getattr,
8470 .setattr = nfs_setattr,
8471 .getxattr = generic_getxattr,
8472 .setxattr = generic_setxattr,
8473 .listxattr = generic_listxattr,
8474 .removexattr = generic_removexattr,
8477 static const struct inode_operations nfs4_file_inode_operations = {
8478 .permission = nfs_permission,
8479 .getattr = nfs_getattr,
8480 .setattr = nfs_setattr,
8481 .getxattr = generic_getxattr,
8482 .setxattr = generic_setxattr,
8483 .listxattr = generic_listxattr,
8484 .removexattr = generic_removexattr,
8487 const struct nfs_rpc_ops nfs_v4_clientops = {
8488 .version = 4, /* protocol version */
8489 .dentry_ops = &nfs4_dentry_operations,
8490 .dir_inode_ops = &nfs4_dir_inode_operations,
8491 .file_inode_ops = &nfs4_file_inode_operations,
8492 .file_ops = &nfs4_file_operations,
8493 .getroot = nfs4_proc_get_root,
8494 .submount = nfs4_submount,
8495 .try_mount = nfs4_try_mount,
8496 .getattr = nfs4_proc_getattr,
8497 .setattr = nfs4_proc_setattr,
8498 .lookup = nfs4_proc_lookup,
8499 .access = nfs4_proc_access,
8500 .readlink = nfs4_proc_readlink,
8501 .create = nfs4_proc_create,
8502 .remove = nfs4_proc_remove,
8503 .unlink_setup = nfs4_proc_unlink_setup,
8504 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
8505 .unlink_done = nfs4_proc_unlink_done,
8506 .rename_setup = nfs4_proc_rename_setup,
8507 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
8508 .rename_done = nfs4_proc_rename_done,
8509 .link = nfs4_proc_link,
8510 .symlink = nfs4_proc_symlink,
8511 .mkdir = nfs4_proc_mkdir,
8512 .rmdir = nfs4_proc_remove,
8513 .readdir = nfs4_proc_readdir,
8514 .mknod = nfs4_proc_mknod,
8515 .statfs = nfs4_proc_statfs,
8516 .fsinfo = nfs4_proc_fsinfo,
8517 .pathconf = nfs4_proc_pathconf,
8518 .set_capabilities = nfs4_server_capabilities,
8519 .decode_dirent = nfs4_decode_dirent,
8520 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
8521 .read_setup = nfs4_proc_read_setup,
8522 .read_done = nfs4_read_done,
8523 .write_setup = nfs4_proc_write_setup,
8524 .write_done = nfs4_write_done,
8525 .commit_setup = nfs4_proc_commit_setup,
8526 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
8527 .commit_done = nfs4_commit_done,
8528 .lock = nfs4_proc_lock,
8529 .clear_acl_cache = nfs4_zap_acl_attr,
8530 .close_context = nfs4_close_context,
8531 .open_context = nfs4_atomic_open,
8532 .have_delegation = nfs4_have_delegation,
8533 .return_delegation = nfs4_inode_return_delegation,
8534 .alloc_client = nfs4_alloc_client,
8535 .init_client = nfs4_init_client,
8536 .free_client = nfs4_free_client,
8537 .create_server = nfs4_create_server,
8538 .clone_server = nfs_clone_server,
8541 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8542 .prefix = XATTR_NAME_NFSV4_ACL,
8543 .list = nfs4_xattr_list_nfs4_acl,
8544 .get = nfs4_xattr_get_nfs4_acl,
8545 .set = nfs4_xattr_set_nfs4_acl,
8548 const struct xattr_handler *nfs4_xattr_handlers[] = {
8549 &nfs4_xattr_nfs4_acl_handler,
8550 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
8551 &nfs4_xattr_nfs4_label_handler,