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/xattr.h>
55 #include <linux/utsname.h>
56 #include <linux/freezer.h>
59 #include "delegation.h"
65 #include "nfs4idmap.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)
76 /* file attributes which can be mapped to nfs attributes */
77 #define NFS4_VALID_ATTRS (ATTR_MODE \
88 static int _nfs4_proc_open(struct nfs4_opendata *data);
89 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
90 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
91 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
92 static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
93 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
94 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
95 struct nfs_fattr *fattr, struct iattr *sattr,
96 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
97 struct nfs4_label *olabel);
98 #ifdef CONFIG_NFS_V4_1
99 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
101 static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *,
102 struct rpc_cred *, bool);
105 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
106 static inline struct nfs4_label *
107 nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
108 struct iattr *sattr, struct nfs4_label *label)
115 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
118 err = security_dentry_init_security(dentry, sattr->ia_mode,
119 &dentry->d_name, (void **)&label->label, &label->len);
126 nfs4_label_release_security(struct nfs4_label *label)
129 security_release_secctx(label->label, label->len);
131 static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
134 return server->attr_bitmask;
136 return server->attr_bitmask_nl;
139 static inline struct nfs4_label *
140 nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
141 struct iattr *sattr, struct nfs4_label *l)
144 nfs4_label_release_security(struct nfs4_label *label)
147 nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
148 { return server->attr_bitmask; }
151 /* Prevent leaks of NFSv4 errors into userland */
152 static int nfs4_map_errors(int err)
157 case -NFS4ERR_RESOURCE:
158 case -NFS4ERR_LAYOUTTRYLATER:
159 case -NFS4ERR_RECALLCONFLICT:
161 case -NFS4ERR_WRONGSEC:
162 case -NFS4ERR_WRONG_CRED:
164 case -NFS4ERR_BADOWNER:
165 case -NFS4ERR_BADNAME:
167 case -NFS4ERR_SHARE_DENIED:
169 case -NFS4ERR_MINOR_VERS_MISMATCH:
170 return -EPROTONOSUPPORT;
171 case -NFS4ERR_FILE_OPEN:
174 dprintk("%s could not handle NFSv4 error %d\n",
182 * This is our standard bitmap for GETATTR requests.
184 const u32 nfs4_fattr_bitmap[3] = {
186 | FATTR4_WORD0_CHANGE
189 | FATTR4_WORD0_FILEID,
191 | FATTR4_WORD1_NUMLINKS
193 | FATTR4_WORD1_OWNER_GROUP
194 | FATTR4_WORD1_RAWDEV
195 | FATTR4_WORD1_SPACE_USED
196 | FATTR4_WORD1_TIME_ACCESS
197 | FATTR4_WORD1_TIME_METADATA
198 | FATTR4_WORD1_TIME_MODIFY
199 | FATTR4_WORD1_MOUNTED_ON_FILEID,
200 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
201 FATTR4_WORD2_SECURITY_LABEL
205 static const u32 nfs4_pnfs_open_bitmap[3] = {
207 | FATTR4_WORD0_CHANGE
210 | FATTR4_WORD0_FILEID,
212 | FATTR4_WORD1_NUMLINKS
214 | FATTR4_WORD1_OWNER_GROUP
215 | FATTR4_WORD1_RAWDEV
216 | FATTR4_WORD1_SPACE_USED
217 | FATTR4_WORD1_TIME_ACCESS
218 | FATTR4_WORD1_TIME_METADATA
219 | FATTR4_WORD1_TIME_MODIFY,
220 FATTR4_WORD2_MDSTHRESHOLD
221 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
222 | FATTR4_WORD2_SECURITY_LABEL
226 static const u32 nfs4_open_noattr_bitmap[3] = {
228 | FATTR4_WORD0_FILEID,
231 const u32 nfs4_statfs_bitmap[3] = {
232 FATTR4_WORD0_FILES_AVAIL
233 | FATTR4_WORD0_FILES_FREE
234 | FATTR4_WORD0_FILES_TOTAL,
235 FATTR4_WORD1_SPACE_AVAIL
236 | FATTR4_WORD1_SPACE_FREE
237 | FATTR4_WORD1_SPACE_TOTAL
240 const u32 nfs4_pathconf_bitmap[3] = {
242 | FATTR4_WORD0_MAXNAME,
246 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
247 | FATTR4_WORD0_MAXREAD
248 | FATTR4_WORD0_MAXWRITE
249 | FATTR4_WORD0_LEASE_TIME,
250 FATTR4_WORD1_TIME_DELTA
251 | FATTR4_WORD1_FS_LAYOUT_TYPES,
252 FATTR4_WORD2_LAYOUT_BLKSIZE
253 | FATTR4_WORD2_CLONE_BLKSIZE
256 const u32 nfs4_fs_locations_bitmap[3] = {
258 | FATTR4_WORD0_CHANGE
261 | FATTR4_WORD0_FILEID
262 | FATTR4_WORD0_FS_LOCATIONS,
264 | FATTR4_WORD1_NUMLINKS
266 | FATTR4_WORD1_OWNER_GROUP
267 | FATTR4_WORD1_RAWDEV
268 | FATTR4_WORD1_SPACE_USED
269 | FATTR4_WORD1_TIME_ACCESS
270 | FATTR4_WORD1_TIME_METADATA
271 | FATTR4_WORD1_TIME_MODIFY
272 | FATTR4_WORD1_MOUNTED_ON_FILEID,
275 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
276 struct nfs4_readdir_arg *readdir)
278 unsigned int attrs = FATTR4_WORD0_FILEID | FATTR4_WORD0_TYPE;
282 readdir->cookie = cookie;
283 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
288 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
293 * NFSv4 servers do not return entries for '.' and '..'
294 * Therefore, we fake these entries here. We let '.'
295 * have cookie 0 and '..' have cookie 1. Note that
296 * when talking to the server, we always send cookie 0
299 start = p = kmap_atomic(*readdir->pages);
302 *p++ = xdr_one; /* next */
303 *p++ = xdr_zero; /* cookie, first word */
304 *p++ = xdr_one; /* cookie, second word */
305 *p++ = xdr_one; /* entry len */
306 memcpy(p, ".\0\0\0", 4); /* entry */
308 *p++ = xdr_one; /* bitmap length */
309 *p++ = htonl(attrs); /* bitmap */
310 *p++ = htonl(12); /* attribute buffer length */
311 *p++ = htonl(NF4DIR);
312 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
315 *p++ = xdr_one; /* next */
316 *p++ = xdr_zero; /* cookie, first word */
317 *p++ = xdr_two; /* cookie, second word */
318 *p++ = xdr_two; /* entry len */
319 memcpy(p, "..\0\0", 4); /* entry */
321 *p++ = xdr_one; /* bitmap length */
322 *p++ = htonl(attrs); /* bitmap */
323 *p++ = htonl(12); /* attribute buffer length */
324 *p++ = htonl(NF4DIR);
325 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
327 readdir->pgbase = (char *)p - (char *)start;
328 readdir->count -= readdir->pgbase;
329 kunmap_atomic(start);
332 static void nfs4_test_and_free_stateid(struct nfs_server *server,
333 nfs4_stateid *stateid,
334 struct rpc_cred *cred)
336 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops;
338 ops->test_and_free_expired(server, stateid, cred);
341 static void __nfs4_free_revoked_stateid(struct nfs_server *server,
342 nfs4_stateid *stateid,
343 struct rpc_cred *cred)
345 stateid->type = NFS4_REVOKED_STATEID_TYPE;
346 nfs4_test_and_free_stateid(server, stateid, cred);
349 static void nfs4_free_revoked_stateid(struct nfs_server *server,
350 const nfs4_stateid *stateid,
351 struct rpc_cred *cred)
355 nfs4_stateid_copy(&tmp, stateid);
356 __nfs4_free_revoked_stateid(server, &tmp, cred);
359 static long nfs4_update_delay(long *timeout)
363 return NFS4_POLL_RETRY_MAX;
365 *timeout = NFS4_POLL_RETRY_MIN;
366 if (*timeout > NFS4_POLL_RETRY_MAX)
367 *timeout = NFS4_POLL_RETRY_MAX;
373 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
379 freezable_schedule_timeout_killable_unsafe(
380 nfs4_update_delay(timeout));
381 if (fatal_signal_pending(current))
386 /* This is the error handling routine for processes that are allowed
389 static int nfs4_do_handle_exception(struct nfs_server *server,
390 int errorcode, struct nfs4_exception *exception)
392 struct nfs_client *clp = server->nfs_client;
393 struct nfs4_state *state = exception->state;
394 const nfs4_stateid *stateid = exception->stateid;
395 struct inode *inode = exception->inode;
398 exception->delay = 0;
399 exception->recovering = 0;
400 exception->retry = 0;
402 if (stateid == NULL && state != NULL)
403 stateid = &state->stateid;
408 case -NFS4ERR_DELEG_REVOKED:
409 case -NFS4ERR_ADMIN_REVOKED:
410 case -NFS4ERR_EXPIRED:
411 case -NFS4ERR_BAD_STATEID:
412 if (inode != NULL && stateid != NULL) {
413 nfs_inode_find_state_and_recover(inode,
415 goto wait_on_recovery;
417 case -NFS4ERR_OPENMODE:
421 err = nfs_async_inode_return_delegation(inode,
424 goto wait_on_recovery;
425 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) {
426 exception->retry = 1;
432 ret = nfs4_schedule_stateid_recovery(server, state);
435 goto wait_on_recovery;
436 case -NFS4ERR_STALE_STATEID:
437 case -NFS4ERR_STALE_CLIENTID:
438 nfs4_schedule_lease_recovery(clp);
439 goto wait_on_recovery;
441 ret = nfs4_schedule_migration_recovery(server);
444 goto wait_on_recovery;
445 case -NFS4ERR_LEASE_MOVED:
446 nfs4_schedule_lease_moved_recovery(clp);
447 goto wait_on_recovery;
448 #if defined(CONFIG_NFS_V4_1)
449 case -NFS4ERR_BADSESSION:
450 case -NFS4ERR_BADSLOT:
451 case -NFS4ERR_BAD_HIGH_SLOT:
452 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
453 case -NFS4ERR_DEADSESSION:
454 case -NFS4ERR_SEQ_FALSE_RETRY:
455 case -NFS4ERR_SEQ_MISORDERED:
456 dprintk("%s ERROR: %d Reset session\n", __func__,
458 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
459 goto wait_on_recovery;
460 #endif /* defined(CONFIG_NFS_V4_1) */
461 case -NFS4ERR_FILE_OPEN:
462 if (exception->timeout > HZ) {
463 /* We have retried a decent amount, time to
470 nfs_inc_server_stats(server, NFSIOS_DELAY);
472 case -NFS4ERR_LAYOUTTRYLATER:
473 case -NFS4ERR_RECALLCONFLICT:
474 exception->delay = 1;
477 case -NFS4ERR_RETRY_UNCACHED_REP:
478 case -NFS4ERR_OLD_STATEID:
479 exception->retry = 1;
481 case -NFS4ERR_BADOWNER:
482 /* The following works around a Linux server bug! */
483 case -NFS4ERR_BADNAME:
484 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
485 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
486 exception->retry = 1;
487 printk(KERN_WARNING "NFS: v4 server %s "
488 "does not accept raw "
490 "Reenabling the idmapper.\n",
491 server->nfs_client->cl_hostname);
494 /* We failed to handle the error */
495 return nfs4_map_errors(ret);
497 exception->recovering = 1;
501 /* This is the error handling routine for processes that are allowed
504 int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
506 struct nfs_client *clp = server->nfs_client;
509 ret = nfs4_do_handle_exception(server, errorcode, exception);
510 if (exception->delay) {
511 ret = nfs4_delay(server->client, &exception->timeout);
514 if (exception->recovering) {
515 ret = nfs4_wait_clnt_recover(clp);
516 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
523 exception->retry = 1;
528 nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
529 int errorcode, struct nfs4_exception *exception)
531 struct nfs_client *clp = server->nfs_client;
534 ret = nfs4_do_handle_exception(server, errorcode, exception);
535 if (exception->delay) {
536 rpc_delay(task, nfs4_update_delay(&exception->timeout));
539 if (exception->recovering) {
540 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
541 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
542 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
545 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
550 exception->retry = 1;
555 nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
556 struct nfs4_state *state, long *timeout)
558 struct nfs4_exception exception = {
562 if (task->tk_status >= 0)
565 exception.timeout = *timeout;
566 task->tk_status = nfs4_async_handle_exception(task, server,
569 if (exception.delay && timeout)
570 *timeout = exception.timeout;
577 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
578 * or 'false' otherwise.
580 static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
582 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
583 return (flavor == RPC_AUTH_GSS_KRB5I) || (flavor == RPC_AUTH_GSS_KRB5P);
586 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
588 spin_lock(&clp->cl_lock);
589 if (time_before(clp->cl_last_renewal,timestamp))
590 clp->cl_last_renewal = timestamp;
591 spin_unlock(&clp->cl_lock);
594 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
596 struct nfs_client *clp = server->nfs_client;
598 if (!nfs4_has_session(clp))
599 do_renew_lease(clp, timestamp);
602 struct nfs4_call_sync_data {
603 const struct nfs_server *seq_server;
604 struct nfs4_sequence_args *seq_args;
605 struct nfs4_sequence_res *seq_res;
608 void nfs4_init_sequence(struct nfs4_sequence_args *args,
609 struct nfs4_sequence_res *res, int cache_reply)
611 args->sa_slot = NULL;
612 args->sa_cache_this = cache_reply;
613 args->sa_privileged = 0;
618 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
620 args->sa_privileged = 1;
623 static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res)
625 struct nfs4_slot *slot = res->sr_slot;
626 struct nfs4_slot_table *tbl;
629 spin_lock(&tbl->slot_tbl_lock);
630 if (!nfs41_wake_and_assign_slot(tbl, slot))
631 nfs4_free_slot(tbl, slot);
632 spin_unlock(&tbl->slot_tbl_lock);
637 static int nfs40_sequence_done(struct rpc_task *task,
638 struct nfs4_sequence_res *res)
640 if (res->sr_slot != NULL)
641 nfs40_sequence_free_slot(res);
645 #if defined(CONFIG_NFS_V4_1)
647 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
649 struct nfs4_session *session;
650 struct nfs4_slot_table *tbl;
651 struct nfs4_slot *slot = res->sr_slot;
652 bool send_new_highest_used_slotid = false;
655 session = tbl->session;
657 /* Bump the slot sequence number */
662 spin_lock(&tbl->slot_tbl_lock);
663 /* Be nice to the server: try to ensure that the last transmitted
664 * value for highest_user_slotid <= target_highest_slotid
666 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
667 send_new_highest_used_slotid = true;
669 if (nfs41_wake_and_assign_slot(tbl, slot)) {
670 send_new_highest_used_slotid = false;
673 nfs4_free_slot(tbl, slot);
675 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
676 send_new_highest_used_slotid = false;
678 spin_unlock(&tbl->slot_tbl_lock);
680 if (send_new_highest_used_slotid)
681 nfs41_notify_server(session->clp);
682 if (waitqueue_active(&tbl->slot_waitq))
683 wake_up_all(&tbl->slot_waitq);
686 static int nfs41_sequence_process(struct rpc_task *task,
687 struct nfs4_sequence_res *res)
689 struct nfs4_session *session;
690 struct nfs4_slot *slot = res->sr_slot;
691 struct nfs_client *clp;
692 bool interrupted = false;
697 /* don't increment the sequence number if the task wasn't sent */
698 if (!RPC_WAS_SENT(task))
701 session = slot->table->session;
703 if (slot->interrupted) {
704 if (res->sr_status != -NFS4ERR_DELAY)
705 slot->interrupted = 0;
709 trace_nfs4_sequence_done(session, res);
710 /* Check the SEQUENCE operation status */
711 switch (res->sr_status) {
713 /* If previous op on slot was interrupted and we reused
714 * the seq# and got a reply from the cache, then retry
716 if (task->tk_status == -EREMOTEIO && interrupted) {
720 /* Update the slot's sequence and clientid lease timer */
723 do_renew_lease(clp, res->sr_timestamp);
724 /* Check sequence flags */
725 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags,
727 nfs41_update_target_slotid(slot->table, slot, res);
731 * sr_status remains 1 if an RPC level error occurred.
732 * The server may or may not have processed the sequence
734 * Mark the slot as having hosted an interrupted RPC call.
736 slot->interrupted = 1;
739 /* The server detected a resend of the RPC call and
740 * returned NFS4ERR_DELAY as per Section 2.10.6.2
743 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
748 case -NFS4ERR_BADSLOT:
750 * The slot id we used was probably retired. Try again
751 * using a different slot id.
754 case -NFS4ERR_SEQ_MISORDERED:
756 * Was the last operation on this sequence interrupted?
757 * If so, retry after bumping the sequence number.
764 * Could this slot have been previously retired?
765 * If so, then the server may be expecting seq_nr = 1!
767 if (slot->seq_nr != 1) {
772 case -NFS4ERR_SEQ_FALSE_RETRY:
776 /* Just update the slot sequence no. */
780 /* The session may be reset by one of the error handlers. */
781 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
785 if (rpc_restart_call_prepare(task)) {
786 nfs41_sequence_free_slot(res);
792 if (!rpc_restart_call(task))
794 rpc_delay(task, NFS4_POLL_RETRY_MAX);
798 int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
800 if (!nfs41_sequence_process(task, res))
802 if (res->sr_slot != NULL)
803 nfs41_sequence_free_slot(res);
807 EXPORT_SYMBOL_GPL(nfs41_sequence_done);
809 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
811 if (res->sr_slot == NULL)
813 if (res->sr_slot->table->session != NULL)
814 return nfs41_sequence_process(task, res);
815 return nfs40_sequence_done(task, res);
818 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
820 if (res->sr_slot != NULL) {
821 if (res->sr_slot->table->session != NULL)
822 nfs41_sequence_free_slot(res);
824 nfs40_sequence_free_slot(res);
828 int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
830 if (res->sr_slot == NULL)
832 if (!res->sr_slot->table->session)
833 return nfs40_sequence_done(task, res);
834 return nfs41_sequence_done(task, res);
836 EXPORT_SYMBOL_GPL(nfs4_sequence_done);
838 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
840 struct nfs4_call_sync_data *data = calldata;
842 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
844 nfs4_setup_sequence(data->seq_server->nfs_client,
845 data->seq_args, data->seq_res, task);
848 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
850 struct nfs4_call_sync_data *data = calldata;
852 nfs41_sequence_done(task, data->seq_res);
855 static const struct rpc_call_ops nfs41_call_sync_ops = {
856 .rpc_call_prepare = nfs41_call_sync_prepare,
857 .rpc_call_done = nfs41_call_sync_done,
860 #else /* !CONFIG_NFS_V4_1 */
862 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
864 return nfs40_sequence_done(task, res);
867 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
869 if (res->sr_slot != NULL)
870 nfs40_sequence_free_slot(res);
873 int nfs4_sequence_done(struct rpc_task *task,
874 struct nfs4_sequence_res *res)
876 return nfs40_sequence_done(task, res);
878 EXPORT_SYMBOL_GPL(nfs4_sequence_done);
880 #endif /* !CONFIG_NFS_V4_1 */
882 int nfs4_setup_sequence(const struct nfs_client *client,
883 struct nfs4_sequence_args *args,
884 struct nfs4_sequence_res *res,
885 struct rpc_task *task)
887 struct nfs4_session *session = nfs4_get_session(client);
888 struct nfs4_slot_table *tbl = client->cl_slot_tbl;
889 struct nfs4_slot *slot;
891 /* slot already allocated? */
892 if (res->sr_slot != NULL)
896 tbl = &session->fc_slot_table;
897 task->tk_timeout = 0;
900 spin_lock(&tbl->slot_tbl_lock);
901 /* The state manager will wait until the slot table is empty */
902 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
905 slot = nfs4_alloc_slot(tbl);
907 /* Try again in 1/4 second */
908 if (slot == ERR_PTR(-ENOMEM))
909 task->tk_timeout = HZ >> 2;
912 spin_unlock(&tbl->slot_tbl_lock);
914 slot->privileged = args->sa_privileged ? 1 : 0;
915 args->sa_slot = slot;
919 res->sr_timestamp = jiffies;
920 res->sr_status_flags = 0;
924 trace_nfs4_setup_sequence(session, args);
926 rpc_call_start(task);
930 if (args->sa_privileged)
931 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
932 NULL, RPC_PRIORITY_PRIVILEGED);
934 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
935 spin_unlock(&tbl->slot_tbl_lock);
938 EXPORT_SYMBOL_GPL(nfs4_setup_sequence);
940 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
942 struct nfs4_call_sync_data *data = calldata;
943 nfs4_setup_sequence(data->seq_server->nfs_client,
944 data->seq_args, data->seq_res, task);
947 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
949 struct nfs4_call_sync_data *data = calldata;
950 nfs4_sequence_done(task, data->seq_res);
953 static const struct rpc_call_ops nfs40_call_sync_ops = {
954 .rpc_call_prepare = nfs40_call_sync_prepare,
955 .rpc_call_done = nfs40_call_sync_done,
958 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
959 struct nfs_server *server,
960 struct rpc_message *msg,
961 struct nfs4_sequence_args *args,
962 struct nfs4_sequence_res *res)
965 struct rpc_task *task;
966 struct nfs_client *clp = server->nfs_client;
967 struct nfs4_call_sync_data data = {
968 .seq_server = server,
972 struct rpc_task_setup task_setup = {
975 .callback_ops = clp->cl_mvops->call_sync_ops,
976 .callback_data = &data
979 task = rpc_run_task(&task_setup);
983 ret = task->tk_status;
989 int nfs4_call_sync(struct rpc_clnt *clnt,
990 struct nfs_server *server,
991 struct rpc_message *msg,
992 struct nfs4_sequence_args *args,
993 struct nfs4_sequence_res *res,
996 nfs4_init_sequence(args, res, cache_reply);
997 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
1000 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo,
1001 unsigned long timestamp)
1003 struct nfs_inode *nfsi = NFS_I(dir);
1005 spin_lock(&dir->i_lock);
1006 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1007 if (cinfo->atomic && cinfo->before == dir->i_version) {
1008 nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE;
1009 nfsi->attrtimeo_timestamp = jiffies;
1011 nfs_force_lookup_revalidate(dir);
1012 if (cinfo->before != dir->i_version)
1013 nfsi->cache_validity |= NFS_INO_INVALID_ACCESS |
1014 NFS_INO_INVALID_ACL;
1016 dir->i_version = cinfo->after;
1017 nfsi->read_cache_jiffies = timestamp;
1018 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
1019 nfs_fscache_invalidate(dir);
1020 spin_unlock(&dir->i_lock);
1023 struct nfs4_opendata {
1025 struct nfs_openargs o_arg;
1026 struct nfs_openres o_res;
1027 struct nfs_open_confirmargs c_arg;
1028 struct nfs_open_confirmres c_res;
1029 struct nfs4_string owner_name;
1030 struct nfs4_string group_name;
1031 struct nfs4_label *a_label;
1032 struct nfs_fattr f_attr;
1033 struct nfs4_label *f_label;
1035 struct dentry *dentry;
1036 struct nfs4_state_owner *owner;
1037 struct nfs4_state *state;
1039 unsigned long timestamp;
1047 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1048 int err, struct nfs4_exception *exception)
1052 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1054 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1055 exception->retry = 1;
1060 nfs4_map_atomic_open_share(struct nfs_server *server,
1061 fmode_t fmode, int openflags)
1065 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1067 res = NFS4_SHARE_ACCESS_READ;
1070 res = NFS4_SHARE_ACCESS_WRITE;
1072 case FMODE_READ|FMODE_WRITE:
1073 res = NFS4_SHARE_ACCESS_BOTH;
1075 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1077 /* Want no delegation if we're using O_DIRECT */
1078 if (openflags & O_DIRECT)
1079 res |= NFS4_SHARE_WANT_NO_DELEG;
1084 static enum open_claim_type4
1085 nfs4_map_atomic_open_claim(struct nfs_server *server,
1086 enum open_claim_type4 claim)
1088 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1093 case NFS4_OPEN_CLAIM_FH:
1094 return NFS4_OPEN_CLAIM_NULL;
1095 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1096 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1097 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1098 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1102 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1104 p->o_res.f_attr = &p->f_attr;
1105 p->o_res.f_label = p->f_label;
1106 p->o_res.seqid = p->o_arg.seqid;
1107 p->c_res.seqid = p->c_arg.seqid;
1108 p->o_res.server = p->o_arg.server;
1109 p->o_res.access_request = p->o_arg.access;
1110 nfs_fattr_init(&p->f_attr);
1111 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
1114 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
1115 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
1116 const struct iattr *attrs,
1117 struct nfs4_label *label,
1118 enum open_claim_type4 claim,
1121 struct dentry *parent = dget_parent(dentry);
1122 struct inode *dir = d_inode(parent);
1123 struct nfs_server *server = NFS_SERVER(dir);
1124 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1125 struct nfs4_opendata *p;
1127 p = kzalloc(sizeof(*p), gfp_mask);
1131 p->f_label = nfs4_label_alloc(server, gfp_mask);
1132 if (IS_ERR(p->f_label))
1135 p->a_label = nfs4_label_alloc(server, gfp_mask);
1136 if (IS_ERR(p->a_label))
1139 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1140 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
1141 if (IS_ERR(p->o_arg.seqid))
1142 goto err_free_label;
1143 nfs_sb_active(dentry->d_sb);
1144 p->dentry = dget(dentry);
1147 atomic_inc(&sp->so_count);
1148 p->o_arg.open_flags = flags;
1149 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
1150 p->o_arg.umask = current_umask();
1151 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1152 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1154 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1155 * will return permission denied for all bits until close */
1156 if (!(flags & O_EXCL)) {
1157 /* ask server to check for all possible rights as results
1159 switch (p->o_arg.claim) {
1162 case NFS4_OPEN_CLAIM_NULL:
1163 case NFS4_OPEN_CLAIM_FH:
1164 p->o_arg.access = NFS4_ACCESS_READ |
1165 NFS4_ACCESS_MODIFY |
1166 NFS4_ACCESS_EXTEND |
1167 NFS4_ACCESS_EXECUTE;
1170 p->o_arg.clientid = server->nfs_client->cl_clientid;
1171 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1172 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
1173 p->o_arg.name = &dentry->d_name;
1174 p->o_arg.server = server;
1175 p->o_arg.bitmask = nfs4_bitmask(server, label);
1176 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1177 p->o_arg.label = nfs4_label_copy(p->a_label, label);
1178 switch (p->o_arg.claim) {
1179 case NFS4_OPEN_CLAIM_NULL:
1180 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1181 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1182 p->o_arg.fh = NFS_FH(dir);
1184 case NFS4_OPEN_CLAIM_PREVIOUS:
1185 case NFS4_OPEN_CLAIM_FH:
1186 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1187 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1188 p->o_arg.fh = NFS_FH(d_inode(dentry));
1190 if (attrs != NULL && attrs->ia_valid != 0) {
1193 p->o_arg.u.attrs = &p->attrs;
1194 memcpy(&p->attrs, attrs, sizeof(p->attrs));
1197 verf[1] = current->pid;
1198 memcpy(p->o_arg.u.verifier.data, verf,
1199 sizeof(p->o_arg.u.verifier.data));
1201 p->c_arg.fh = &p->o_res.fh;
1202 p->c_arg.stateid = &p->o_res.stateid;
1203 p->c_arg.seqid = p->o_arg.seqid;
1204 nfs4_init_opendata_res(p);
1205 kref_init(&p->kref);
1209 nfs4_label_free(p->a_label);
1211 nfs4_label_free(p->f_label);
1219 static void nfs4_opendata_free(struct kref *kref)
1221 struct nfs4_opendata *p = container_of(kref,
1222 struct nfs4_opendata, kref);
1223 struct super_block *sb = p->dentry->d_sb;
1225 nfs_free_seqid(p->o_arg.seqid);
1226 nfs4_sequence_free_slot(&p->o_res.seq_res);
1227 if (p->state != NULL)
1228 nfs4_put_open_state(p->state);
1229 nfs4_put_state_owner(p->owner);
1231 nfs4_label_free(p->a_label);
1232 nfs4_label_free(p->f_label);
1236 nfs_sb_deactive(sb);
1237 nfs_fattr_free_names(&p->f_attr);
1238 kfree(p->f_attr.mdsthreshold);
1242 static void nfs4_opendata_put(struct nfs4_opendata *p)
1245 kref_put(&p->kref, nfs4_opendata_free);
1248 static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1251 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1252 case FMODE_READ|FMODE_WRITE:
1253 return state->n_rdwr != 0;
1255 return state->n_wronly != 0;
1257 return state->n_rdonly != 0;
1263 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
1267 if (open_mode & (O_EXCL|O_TRUNC))
1269 switch (mode & (FMODE_READ|FMODE_WRITE)) {
1271 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1272 && state->n_rdonly != 0;
1275 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1276 && state->n_wronly != 0;
1278 case FMODE_READ|FMODE_WRITE:
1279 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1280 && state->n_rdwr != 0;
1286 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1287 enum open_claim_type4 claim)
1289 if (delegation == NULL)
1291 if ((delegation->type & fmode) != fmode)
1293 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1296 case NFS4_OPEN_CLAIM_NULL:
1297 case NFS4_OPEN_CLAIM_FH:
1299 case NFS4_OPEN_CLAIM_PREVIOUS:
1300 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1305 nfs_mark_delegation_referenced(delegation);
1309 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
1318 case FMODE_READ|FMODE_WRITE:
1321 nfs4_state_set_mode_locked(state, state->state | fmode);
1324 #ifdef CONFIG_NFS_V4_1
1325 static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state)
1327 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags))
1329 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags))
1331 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags))
1335 #endif /* CONFIG_NFS_V4_1 */
1337 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1339 struct nfs_client *clp = state->owner->so_server->nfs_client;
1340 bool need_recover = false;
1342 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1343 need_recover = true;
1344 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1345 need_recover = true;
1346 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1347 need_recover = true;
1349 nfs4_state_mark_reclaim_nograce(clp, state);
1352 static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1353 const nfs4_stateid *stateid, nfs4_stateid *freeme)
1355 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1357 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1358 nfs4_stateid_copy(freeme, &state->open_stateid);
1359 nfs_test_and_clear_all_open_stateid(state);
1362 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1367 static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1369 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1371 if (state->n_wronly)
1372 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1373 if (state->n_rdonly)
1374 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1376 set_bit(NFS_O_RDWR_STATE, &state->flags);
1377 set_bit(NFS_OPEN_STATE, &state->flags);
1380 static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1381 nfs4_stateid *stateid, fmode_t fmode)
1383 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1384 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1386 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1389 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1392 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1393 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1394 clear_bit(NFS_OPEN_STATE, &state->flags);
1396 if (stateid == NULL)
1398 /* Handle OPEN+OPEN_DOWNGRADE races */
1399 if (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1400 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
1401 nfs_resync_open_stateid_locked(state);
1404 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1405 nfs4_stateid_copy(&state->stateid, stateid);
1406 nfs4_stateid_copy(&state->open_stateid, stateid);
1409 static void nfs_clear_open_stateid(struct nfs4_state *state,
1410 nfs4_stateid *arg_stateid,
1411 nfs4_stateid *stateid, fmode_t fmode)
1413 write_seqlock(&state->seqlock);
1414 /* Ignore, if the CLOSE argment doesn't match the current stateid */
1415 if (nfs4_state_match_open_stateid_other(state, arg_stateid))
1416 nfs_clear_open_stateid_locked(state, stateid, fmode);
1417 write_sequnlock(&state->seqlock);
1418 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1419 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1422 static void nfs_set_open_stateid_locked(struct nfs4_state *state,
1423 const nfs4_stateid *stateid, fmode_t fmode,
1424 nfs4_stateid *freeme)
1428 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1431 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1433 case FMODE_READ|FMODE_WRITE:
1434 set_bit(NFS_O_RDWR_STATE, &state->flags);
1436 if (!nfs_need_update_open_stateid(state, stateid, freeme))
1438 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1439 nfs4_stateid_copy(&state->stateid, stateid);
1440 nfs4_stateid_copy(&state->open_stateid, stateid);
1443 static void __update_open_stateid(struct nfs4_state *state,
1444 const nfs4_stateid *open_stateid,
1445 const nfs4_stateid *deleg_stateid,
1447 nfs4_stateid *freeme)
1450 * Protect the call to nfs4_state_set_mode_locked and
1451 * serialise the stateid update
1453 spin_lock(&state->owner->so_lock);
1454 write_seqlock(&state->seqlock);
1455 if (deleg_stateid != NULL) {
1456 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1457 set_bit(NFS_DELEGATED_STATE, &state->flags);
1459 if (open_stateid != NULL)
1460 nfs_set_open_stateid_locked(state, open_stateid, fmode, freeme);
1461 write_sequnlock(&state->seqlock);
1462 update_open_stateflags(state, fmode);
1463 spin_unlock(&state->owner->so_lock);
1466 static int update_open_stateid(struct nfs4_state *state,
1467 const nfs4_stateid *open_stateid,
1468 const nfs4_stateid *delegation,
1471 struct nfs_server *server = NFS_SERVER(state->inode);
1472 struct nfs_client *clp = server->nfs_client;
1473 struct nfs_inode *nfsi = NFS_I(state->inode);
1474 struct nfs_delegation *deleg_cur;
1475 nfs4_stateid freeme = { };
1478 fmode &= (FMODE_READ|FMODE_WRITE);
1481 deleg_cur = rcu_dereference(nfsi->delegation);
1482 if (deleg_cur == NULL)
1485 spin_lock(&deleg_cur->lock);
1486 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
1487 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
1488 (deleg_cur->type & fmode) != fmode)
1489 goto no_delegation_unlock;
1491 if (delegation == NULL)
1492 delegation = &deleg_cur->stateid;
1493 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1494 goto no_delegation_unlock;
1496 nfs_mark_delegation_referenced(deleg_cur);
1497 __update_open_stateid(state, open_stateid, &deleg_cur->stateid,
1500 no_delegation_unlock:
1501 spin_unlock(&deleg_cur->lock);
1505 if (!ret && open_stateid != NULL) {
1506 __update_open_stateid(state, open_stateid, NULL, fmode, &freeme);
1509 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1510 nfs4_schedule_state_manager(clp);
1511 if (freeme.type != 0)
1512 nfs4_test_and_free_stateid(server, &freeme,
1513 state->owner->so_cred);
1518 static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1519 const nfs4_stateid *stateid)
1521 struct nfs4_state *state = lsp->ls_state;
1524 spin_lock(&state->state_lock);
1525 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1527 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1529 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1532 spin_unlock(&state->state_lock);
1536 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1538 struct nfs_delegation *delegation;
1541 delegation = rcu_dereference(NFS_I(inode)->delegation);
1542 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1547 nfs4_inode_return_delegation(inode);
1550 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1552 struct nfs4_state *state = opendata->state;
1553 struct nfs_inode *nfsi = NFS_I(state->inode);
1554 struct nfs_delegation *delegation;
1555 int open_mode = opendata->o_arg.open_flags;
1556 fmode_t fmode = opendata->o_arg.fmode;
1557 enum open_claim_type4 claim = opendata->o_arg.claim;
1558 nfs4_stateid stateid;
1562 spin_lock(&state->owner->so_lock);
1563 if (can_open_cached(state, fmode, open_mode)) {
1564 update_open_stateflags(state, fmode);
1565 spin_unlock(&state->owner->so_lock);
1566 goto out_return_state;
1568 spin_unlock(&state->owner->so_lock);
1570 delegation = rcu_dereference(nfsi->delegation);
1571 if (!can_open_delegated(delegation, fmode, claim)) {
1575 /* Save the delegation */
1576 nfs4_stateid_copy(&stateid, &delegation->stateid);
1578 nfs_release_seqid(opendata->o_arg.seqid);
1579 if (!opendata->is_recover) {
1580 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1586 /* Try to update the stateid using the delegation */
1587 if (update_open_stateid(state, NULL, &stateid, fmode))
1588 goto out_return_state;
1591 return ERR_PTR(ret);
1593 atomic_inc(&state->count);
1598 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1600 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1601 struct nfs_delegation *delegation;
1602 int delegation_flags = 0;
1605 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1607 delegation_flags = delegation->flags;
1609 switch (data->o_arg.claim) {
1612 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1613 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1614 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1615 "returning a delegation for "
1616 "OPEN(CLAIM_DELEGATE_CUR)\n",
1620 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1621 nfs_inode_set_delegation(state->inode,
1622 data->owner->so_cred,
1625 nfs_inode_reclaim_delegation(state->inode,
1626 data->owner->so_cred,
1631 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1632 * and update the nfs4_state.
1634 static struct nfs4_state *
1635 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1637 struct inode *inode = data->state->inode;
1638 struct nfs4_state *state = data->state;
1641 if (!data->rpc_done) {
1642 if (data->rpc_status)
1643 return ERR_PTR(data->rpc_status);
1644 /* cached opens have already been processed */
1648 ret = nfs_refresh_inode(inode, &data->f_attr);
1650 return ERR_PTR(ret);
1652 if (data->o_res.delegation_type != 0)
1653 nfs4_opendata_check_deleg(data, state);
1655 update_open_stateid(state, &data->o_res.stateid, NULL,
1657 atomic_inc(&state->count);
1662 static struct nfs4_state *
1663 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1665 struct inode *inode;
1666 struct nfs4_state *state = NULL;
1669 if (!data->rpc_done) {
1670 state = nfs4_try_open_cached(data);
1671 trace_nfs4_cached_open(data->state);
1676 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1678 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1679 ret = PTR_ERR(inode);
1683 state = nfs4_get_open_state(inode, data->owner);
1686 if (data->o_res.delegation_type != 0)
1687 nfs4_opendata_check_deleg(data, state);
1688 update_open_stateid(state, &data->o_res.stateid, NULL,
1692 nfs_release_seqid(data->o_arg.seqid);
1697 return ERR_PTR(ret);
1700 static struct nfs4_state *
1701 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1703 struct nfs4_state *ret;
1705 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1706 ret =_nfs4_opendata_reclaim_to_nfs4_state(data);
1708 ret = _nfs4_opendata_to_nfs4_state(data);
1709 nfs4_sequence_free_slot(&data->o_res.seq_res);
1713 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1715 struct nfs_inode *nfsi = NFS_I(state->inode);
1716 struct nfs_open_context *ctx;
1718 spin_lock(&state->inode->i_lock);
1719 list_for_each_entry(ctx, &nfsi->open_files, list) {
1720 if (ctx->state != state)
1722 get_nfs_open_context(ctx);
1723 spin_unlock(&state->inode->i_lock);
1726 spin_unlock(&state->inode->i_lock);
1727 return ERR_PTR(-ENOENT);
1730 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1731 struct nfs4_state *state, enum open_claim_type4 claim)
1733 struct nfs4_opendata *opendata;
1735 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1736 NULL, NULL, claim, GFP_NOFS);
1737 if (opendata == NULL)
1738 return ERR_PTR(-ENOMEM);
1739 opendata->state = state;
1740 atomic_inc(&state->count);
1744 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1747 struct nfs4_state *newstate;
1750 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
1752 opendata->o_arg.open_flags = 0;
1753 opendata->o_arg.fmode = fmode;
1754 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1755 NFS_SB(opendata->dentry->d_sb),
1757 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1758 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1759 nfs4_init_opendata_res(opendata);
1760 ret = _nfs4_recover_proc_open(opendata);
1763 newstate = nfs4_opendata_to_nfs4_state(opendata);
1764 if (IS_ERR(newstate))
1765 return PTR_ERR(newstate);
1766 if (newstate != opendata->state)
1768 nfs4_close_state(newstate, fmode);
1772 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1776 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1777 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1778 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1779 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1780 /* memory barrier prior to reading state->n_* */
1781 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1782 clear_bit(NFS_OPEN_STATE, &state->flags);
1784 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1787 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1790 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1794 * We may have performed cached opens for all three recoveries.
1795 * Check if we need to update the current stateid.
1797 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1798 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1799 write_seqlock(&state->seqlock);
1800 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1801 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1802 write_sequnlock(&state->seqlock);
1809 * reclaim state on the server after a reboot.
1811 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1813 struct nfs_delegation *delegation;
1814 struct nfs4_opendata *opendata;
1815 fmode_t delegation_type = 0;
1818 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1819 NFS4_OPEN_CLAIM_PREVIOUS);
1820 if (IS_ERR(opendata))
1821 return PTR_ERR(opendata);
1823 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1824 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1825 delegation_type = delegation->type;
1827 opendata->o_arg.u.delegation_type = delegation_type;
1828 status = nfs4_open_recover(opendata, state);
1829 nfs4_opendata_put(opendata);
1833 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1835 struct nfs_server *server = NFS_SERVER(state->inode);
1836 struct nfs4_exception exception = { };
1839 err = _nfs4_do_open_reclaim(ctx, state);
1840 trace_nfs4_open_reclaim(ctx, 0, err);
1841 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1843 if (err != -NFS4ERR_DELAY)
1845 nfs4_handle_exception(server, err, &exception);
1846 } while (exception.retry);
1850 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1852 struct nfs_open_context *ctx;
1855 ctx = nfs4_state_find_open_context(state);
1858 ret = nfs4_do_open_reclaim(ctx, state);
1859 put_nfs_open_context(ctx);
1863 static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1867 printk(KERN_ERR "NFS: %s: unhandled error "
1868 "%d.\n", __func__, err);
1874 case -NFS4ERR_BADSESSION:
1875 case -NFS4ERR_BADSLOT:
1876 case -NFS4ERR_BAD_HIGH_SLOT:
1877 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1878 case -NFS4ERR_DEADSESSION:
1879 set_bit(NFS_DELEGATED_STATE, &state->flags);
1880 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1882 case -NFS4ERR_STALE_CLIENTID:
1883 case -NFS4ERR_STALE_STATEID:
1884 set_bit(NFS_DELEGATED_STATE, &state->flags);
1885 /* Don't recall a delegation if it was lost */
1886 nfs4_schedule_lease_recovery(server->nfs_client);
1888 case -NFS4ERR_MOVED:
1889 nfs4_schedule_migration_recovery(server);
1891 case -NFS4ERR_LEASE_MOVED:
1892 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1894 case -NFS4ERR_DELEG_REVOKED:
1895 case -NFS4ERR_ADMIN_REVOKED:
1896 case -NFS4ERR_EXPIRED:
1897 case -NFS4ERR_BAD_STATEID:
1898 case -NFS4ERR_OPENMODE:
1899 nfs_inode_find_state_and_recover(state->inode,
1901 nfs4_schedule_stateid_recovery(server, state);
1903 case -NFS4ERR_DELAY:
1904 case -NFS4ERR_GRACE:
1905 set_bit(NFS_DELEGATED_STATE, &state->flags);
1909 case -NFS4ERR_DENIED:
1910 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1916 int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
1917 struct nfs4_state *state, const nfs4_stateid *stateid,
1920 struct nfs_server *server = NFS_SERVER(state->inode);
1921 struct nfs4_opendata *opendata;
1924 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1925 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1926 if (IS_ERR(opendata))
1927 return PTR_ERR(opendata);
1928 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1929 write_seqlock(&state->seqlock);
1930 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1931 write_sequnlock(&state->seqlock);
1932 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1933 switch (type & (FMODE_READ|FMODE_WRITE)) {
1934 case FMODE_READ|FMODE_WRITE:
1936 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1939 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1943 err = nfs4_open_recover_helper(opendata, FMODE_READ);
1945 nfs4_opendata_put(opendata);
1946 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1949 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1951 struct nfs4_opendata *data = calldata;
1953 nfs4_setup_sequence(data->o_arg.server->nfs_client,
1954 &data->c_arg.seq_args, &data->c_res.seq_res, task);
1957 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1959 struct nfs4_opendata *data = calldata;
1961 nfs40_sequence_done(task, &data->c_res.seq_res);
1963 data->rpc_status = task->tk_status;
1964 if (data->rpc_status == 0) {
1965 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1966 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1967 renew_lease(data->o_res.server, data->timestamp);
1968 data->rpc_done = true;
1972 static void nfs4_open_confirm_release(void *calldata)
1974 struct nfs4_opendata *data = calldata;
1975 struct nfs4_state *state = NULL;
1977 /* If this request hasn't been cancelled, do nothing */
1978 if (!data->cancelled)
1980 /* In case of error, no cleanup! */
1981 if (!data->rpc_done)
1983 state = nfs4_opendata_to_nfs4_state(data);
1985 nfs4_close_state(state, data->o_arg.fmode);
1987 nfs4_opendata_put(data);
1990 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1991 .rpc_call_prepare = nfs4_open_confirm_prepare,
1992 .rpc_call_done = nfs4_open_confirm_done,
1993 .rpc_release = nfs4_open_confirm_release,
1997 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1999 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
2001 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
2002 struct rpc_task *task;
2003 struct rpc_message msg = {
2004 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
2005 .rpc_argp = &data->c_arg,
2006 .rpc_resp = &data->c_res,
2007 .rpc_cred = data->owner->so_cred,
2009 struct rpc_task_setup task_setup_data = {
2010 .rpc_client = server->client,
2011 .rpc_message = &msg,
2012 .callback_ops = &nfs4_open_confirm_ops,
2013 .callback_data = data,
2014 .workqueue = nfsiod_workqueue,
2015 .flags = RPC_TASK_ASYNC,
2019 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
2020 kref_get(&data->kref);
2021 data->rpc_done = false;
2022 data->rpc_status = 0;
2023 data->timestamp = jiffies;
2024 if (data->is_recover)
2025 nfs4_set_sequence_privileged(&data->c_arg.seq_args);
2026 task = rpc_run_task(&task_setup_data);
2028 return PTR_ERR(task);
2029 status = rpc_wait_for_completion_task(task);
2031 data->cancelled = true;
2034 status = data->rpc_status;
2039 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
2041 struct nfs4_opendata *data = calldata;
2042 struct nfs4_state_owner *sp = data->owner;
2043 struct nfs_client *clp = sp->so_server->nfs_client;
2044 enum open_claim_type4 claim = data->o_arg.claim;
2046 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
2049 * Check if we still need to send an OPEN call, or if we can use
2050 * a delegation instead.
2052 if (data->state != NULL) {
2053 struct nfs_delegation *delegation;
2055 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
2058 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2059 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
2060 goto unlock_no_action;
2063 /* Update client id. */
2064 data->o_arg.clientid = clp->cl_clientid;
2068 case NFS4_OPEN_CLAIM_PREVIOUS:
2069 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
2070 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2071 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
2072 case NFS4_OPEN_CLAIM_FH:
2073 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
2074 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
2076 data->timestamp = jiffies;
2077 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
2078 &data->o_arg.seq_args,
2079 &data->o_res.seq_res,
2081 nfs_release_seqid(data->o_arg.seqid);
2083 /* Set the create mode (note dependency on the session type) */
2084 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2085 if (data->o_arg.open_flags & O_EXCL) {
2086 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2087 if (nfs4_has_persistent_session(clp))
2088 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2089 else if (clp->cl_mvops->minor_version > 0)
2090 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2094 trace_nfs4_cached_open(data->state);
2097 task->tk_action = NULL;
2099 nfs4_sequence_done(task, &data->o_res.seq_res);
2102 static void nfs4_open_done(struct rpc_task *task, void *calldata)
2104 struct nfs4_opendata *data = calldata;
2106 data->rpc_status = task->tk_status;
2108 if (!nfs4_sequence_process(task, &data->o_res.seq_res))
2111 if (task->tk_status == 0) {
2112 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2113 switch (data->o_res.f_attr->mode & S_IFMT) {
2117 data->rpc_status = -ELOOP;
2120 data->rpc_status = -EISDIR;
2123 data->rpc_status = -ENOTDIR;
2126 renew_lease(data->o_res.server, data->timestamp);
2127 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2128 nfs_confirm_seqid(&data->owner->so_seqid, 0);
2130 data->rpc_done = true;
2133 static void nfs4_open_release(void *calldata)
2135 struct nfs4_opendata *data = calldata;
2136 struct nfs4_state *state = NULL;
2138 /* If this request hasn't been cancelled, do nothing */
2139 if (!data->cancelled)
2141 /* In case of error, no cleanup! */
2142 if (data->rpc_status != 0 || !data->rpc_done)
2144 /* In case we need an open_confirm, no cleanup! */
2145 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2147 state = nfs4_opendata_to_nfs4_state(data);
2149 nfs4_close_state(state, data->o_arg.fmode);
2151 nfs4_opendata_put(data);
2154 static const struct rpc_call_ops nfs4_open_ops = {
2155 .rpc_call_prepare = nfs4_open_prepare,
2156 .rpc_call_done = nfs4_open_done,
2157 .rpc_release = nfs4_open_release,
2160 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
2162 struct inode *dir = d_inode(data->dir);
2163 struct nfs_server *server = NFS_SERVER(dir);
2164 struct nfs_openargs *o_arg = &data->o_arg;
2165 struct nfs_openres *o_res = &data->o_res;
2166 struct rpc_task *task;
2167 struct rpc_message msg = {
2168 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2171 .rpc_cred = data->owner->so_cred,
2173 struct rpc_task_setup task_setup_data = {
2174 .rpc_client = server->client,
2175 .rpc_message = &msg,
2176 .callback_ops = &nfs4_open_ops,
2177 .callback_data = data,
2178 .workqueue = nfsiod_workqueue,
2179 .flags = RPC_TASK_ASYNC,
2183 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
2184 kref_get(&data->kref);
2185 data->rpc_done = false;
2186 data->rpc_status = 0;
2187 data->cancelled = false;
2188 data->is_recover = false;
2190 nfs4_set_sequence_privileged(&o_arg->seq_args);
2191 data->is_recover = true;
2193 task = rpc_run_task(&task_setup_data);
2195 return PTR_ERR(task);
2196 status = rpc_wait_for_completion_task(task);
2198 data->cancelled = true;
2201 status = data->rpc_status;
2207 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2209 struct inode *dir = d_inode(data->dir);
2210 struct nfs_openres *o_res = &data->o_res;
2213 status = nfs4_run_open_task(data, 1);
2214 if (status != 0 || !data->rpc_done)
2217 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2219 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM)
2220 status = _nfs4_proc_open_confirm(data);
2226 * Additional permission checks in order to distinguish between an
2227 * open for read, and an open for execute. This works around the
2228 * fact that NFSv4 OPEN treats read and execute permissions as being
2230 * Note that in the non-execute case, we want to turn off permission
2231 * checking if we just created a new file (POSIX open() semantics).
2233 static int nfs4_opendata_access(struct rpc_cred *cred,
2234 struct nfs4_opendata *opendata,
2235 struct nfs4_state *state, fmode_t fmode,
2238 struct nfs_access_entry cache;
2241 /* access call failed or for some reason the server doesn't
2242 * support any access modes -- defer access call until later */
2243 if (opendata->o_res.access_supported == 0)
2248 * Use openflags to check for exec, because fmode won't
2249 * always have FMODE_EXEC set when file open for exec.
2251 if (openflags & __FMODE_EXEC) {
2252 /* ONLY check for exec rights */
2253 if (S_ISDIR(state->inode->i_mode))
2254 mask = NFS4_ACCESS_LOOKUP;
2256 mask = NFS4_ACCESS_EXECUTE;
2257 } else if ((fmode & FMODE_READ) && !opendata->file_created)
2258 mask = NFS4_ACCESS_READ;
2261 cache.jiffies = jiffies;
2262 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2263 nfs_access_add_cache(state->inode, &cache);
2265 flags = NFS4_ACCESS_READ | NFS4_ACCESS_EXECUTE | NFS4_ACCESS_LOOKUP;
2266 if ((mask & ~cache.mask & flags) == 0)
2273 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2275 static int _nfs4_proc_open(struct nfs4_opendata *data)
2277 struct inode *dir = d_inode(data->dir);
2278 struct nfs_server *server = NFS_SERVER(dir);
2279 struct nfs_openargs *o_arg = &data->o_arg;
2280 struct nfs_openres *o_res = &data->o_res;
2283 status = nfs4_run_open_task(data, 0);
2284 if (!data->rpc_done)
2287 if (status == -NFS4ERR_BADNAME &&
2288 !(o_arg->open_flags & O_CREAT))
2293 nfs_fattr_map_and_free_names(server, &data->f_attr);
2295 if (o_arg->open_flags & O_CREAT) {
2296 if (o_arg->open_flags & O_EXCL)
2297 data->file_created = true;
2298 else if (o_res->cinfo.before != o_res->cinfo.after)
2299 data->file_created = true;
2300 if (data->file_created || dir->i_version != o_res->cinfo.after)
2301 update_changeattr(dir, &o_res->cinfo,
2302 o_res->f_attr->time_start);
2304 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2305 server->caps &= ~NFS_CAP_POSIX_LOCK;
2306 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2307 status = _nfs4_proc_open_confirm(data);
2311 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) {
2312 nfs4_sequence_free_slot(&o_res->seq_res);
2313 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
2320 * reclaim state on the server after a network partition.
2321 * Assumes caller holds the appropriate lock
2323 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2325 struct nfs4_opendata *opendata;
2328 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2329 NFS4_OPEN_CLAIM_FH);
2330 if (IS_ERR(opendata))
2331 return PTR_ERR(opendata);
2332 ret = nfs4_open_recover(opendata, state);
2334 d_drop(ctx->dentry);
2335 nfs4_opendata_put(opendata);
2339 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2341 struct nfs_server *server = NFS_SERVER(state->inode);
2342 struct nfs4_exception exception = { };
2346 err = _nfs4_open_expired(ctx, state);
2347 trace_nfs4_open_expired(ctx, 0, err);
2348 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2353 case -NFS4ERR_GRACE:
2354 case -NFS4ERR_DELAY:
2355 nfs4_handle_exception(server, err, &exception);
2358 } while (exception.retry);
2363 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2365 struct nfs_open_context *ctx;
2368 ctx = nfs4_state_find_open_context(state);
2371 ret = nfs4_do_open_expired(ctx, state);
2372 put_nfs_open_context(ctx);
2376 static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state,
2377 const nfs4_stateid *stateid)
2379 nfs_remove_bad_delegation(state->inode, stateid);
2380 write_seqlock(&state->seqlock);
2381 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2382 write_sequnlock(&state->seqlock);
2383 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2386 static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2388 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2389 nfs_finish_clear_delegation_stateid(state, NULL);
2392 static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2394 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2395 nfs40_clear_delegation_stateid(state);
2396 return nfs4_open_expired(sp, state);
2399 static int nfs40_test_and_free_expired_stateid(struct nfs_server *server,
2400 nfs4_stateid *stateid,
2401 struct rpc_cred *cred)
2403 return -NFS4ERR_BAD_STATEID;
2406 #if defined(CONFIG_NFS_V4_1)
2407 static int nfs41_test_and_free_expired_stateid(struct nfs_server *server,
2408 nfs4_stateid *stateid,
2409 struct rpc_cred *cred)
2413 switch (stateid->type) {
2416 case NFS4_INVALID_STATEID_TYPE:
2417 case NFS4_SPECIAL_STATEID_TYPE:
2418 return -NFS4ERR_BAD_STATEID;
2419 case NFS4_REVOKED_STATEID_TYPE:
2423 status = nfs41_test_stateid(server, stateid, cred);
2425 case -NFS4ERR_EXPIRED:
2426 case -NFS4ERR_ADMIN_REVOKED:
2427 case -NFS4ERR_DELEG_REVOKED:
2433 /* Ack the revoked state to the server */
2434 nfs41_free_stateid(server, stateid, cred, true);
2435 return -NFS4ERR_EXPIRED;
2438 static void nfs41_check_delegation_stateid(struct nfs4_state *state)
2440 struct nfs_server *server = NFS_SERVER(state->inode);
2441 nfs4_stateid stateid;
2442 struct nfs_delegation *delegation;
2443 struct rpc_cred *cred;
2446 /* Get the delegation credential for use by test/free_stateid */
2448 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2449 if (delegation == NULL) {
2454 nfs4_stateid_copy(&stateid, &delegation->stateid);
2455 if (test_bit(NFS_DELEGATION_REVOKED, &delegation->flags) ||
2456 !test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED,
2457 &delegation->flags)) {
2459 nfs_finish_clear_delegation_stateid(state, &stateid);
2463 cred = get_rpccred(delegation->cred);
2465 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred);
2466 trace_nfs4_test_delegation_stateid(state, NULL, status);
2467 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID)
2468 nfs_finish_clear_delegation_stateid(state, &stateid);
2474 * nfs41_check_expired_locks - possibly free a lock stateid
2476 * @state: NFSv4 state for an inode
2478 * Returns NFS_OK if recovery for this stateid is now finished.
2479 * Otherwise a negative NFS4ERR value is returned.
2481 static int nfs41_check_expired_locks(struct nfs4_state *state)
2483 int status, ret = NFS_OK;
2484 struct nfs4_lock_state *lsp, *prev = NULL;
2485 struct nfs_server *server = NFS_SERVER(state->inode);
2487 if (!test_bit(LK_STATE_IN_USE, &state->flags))
2490 spin_lock(&state->state_lock);
2491 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
2492 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
2493 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
2495 atomic_inc(&lsp->ls_count);
2496 spin_unlock(&state->state_lock);
2498 nfs4_put_lock_state(prev);
2501 status = nfs41_test_and_free_expired_stateid(server,
2504 trace_nfs4_test_lock_stateid(state, lsp, status);
2505 if (status == -NFS4ERR_EXPIRED ||
2506 status == -NFS4ERR_BAD_STATEID) {
2507 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
2508 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE;
2509 if (!recover_lost_locks)
2510 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2511 } else if (status != NFS_OK) {
2513 nfs4_put_lock_state(prev);
2516 spin_lock(&state->state_lock);
2519 spin_unlock(&state->state_lock);
2520 nfs4_put_lock_state(prev);
2526 * nfs41_check_open_stateid - possibly free an open stateid
2528 * @state: NFSv4 state for an inode
2530 * Returns NFS_OK if recovery for this stateid is now finished.
2531 * Otherwise a negative NFS4ERR value is returned.
2533 static int nfs41_check_open_stateid(struct nfs4_state *state)
2535 struct nfs_server *server = NFS_SERVER(state->inode);
2536 nfs4_stateid *stateid = &state->open_stateid;
2537 struct rpc_cred *cred = state->owner->so_cred;
2540 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) {
2541 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) {
2542 if (nfs4_have_delegation(state->inode, state->state))
2544 return -NFS4ERR_OPENMODE;
2546 return -NFS4ERR_BAD_STATEID;
2548 status = nfs41_test_and_free_expired_stateid(server, stateid, cred);
2549 trace_nfs4_test_open_stateid(state, NULL, status);
2550 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) {
2551 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2552 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2553 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2554 clear_bit(NFS_OPEN_STATE, &state->flags);
2555 stateid->type = NFS4_INVALID_STATEID_TYPE;
2557 if (status != NFS_OK)
2559 if (nfs_open_stateid_recover_openmode(state))
2560 return -NFS4ERR_OPENMODE;
2564 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2568 nfs41_check_delegation_stateid(state);
2569 status = nfs41_check_expired_locks(state);
2570 if (status != NFS_OK)
2572 status = nfs41_check_open_stateid(state);
2573 if (status != NFS_OK)
2574 status = nfs4_open_expired(sp, state);
2580 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2581 * fields corresponding to attributes that were used to store the verifier.
2582 * Make sure we clobber those fields in the later setattr call
2584 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2585 struct iattr *sattr, struct nfs4_label **label)
2587 const u32 *attrset = opendata->o_res.attrset;
2589 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2590 !(sattr->ia_valid & ATTR_ATIME_SET))
2591 sattr->ia_valid |= ATTR_ATIME;
2593 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2594 !(sattr->ia_valid & ATTR_MTIME_SET))
2595 sattr->ia_valid |= ATTR_MTIME;
2597 /* Except MODE, it seems harmless of setting twice. */
2598 if (opendata->o_arg.createmode != NFS4_CREATE_EXCLUSIVE &&
2599 (attrset[1] & FATTR4_WORD1_MODE ||
2600 attrset[2] & FATTR4_WORD2_MODE_UMASK))
2601 sattr->ia_valid &= ~ATTR_MODE;
2603 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2607 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2610 struct nfs_open_context *ctx)
2612 struct nfs4_state_owner *sp = opendata->owner;
2613 struct nfs_server *server = sp->so_server;
2614 struct dentry *dentry;
2615 struct nfs4_state *state;
2619 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2621 ret = _nfs4_proc_open(opendata);
2625 state = nfs4_opendata_to_nfs4_state(opendata);
2626 ret = PTR_ERR(state);
2630 if (server->caps & NFS_CAP_POSIX_LOCK)
2631 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2632 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK)
2633 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags);
2635 dentry = opendata->dentry;
2636 if (d_really_is_negative(dentry)) {
2637 struct dentry *alias;
2639 alias = d_exact_alias(dentry, state->inode);
2641 alias = d_splice_alias(igrab(state->inode), dentry);
2642 /* d_splice_alias() can't fail here - it's a non-directory */
2645 ctx->dentry = dentry = alias;
2647 nfs_set_verifier(dentry,
2648 nfs_save_change_attribute(d_inode(opendata->dir)));
2651 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2655 if (d_inode(dentry) == state->inode) {
2656 nfs_inode_attach_open_context(ctx);
2657 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2658 nfs4_schedule_stateid_recovery(server, state);
2665 * Returns a referenced nfs4_state
2667 static int _nfs4_do_open(struct inode *dir,
2668 struct nfs_open_context *ctx,
2670 struct iattr *sattr,
2671 struct nfs4_label *label,
2674 struct nfs4_state_owner *sp;
2675 struct nfs4_state *state = NULL;
2676 struct nfs_server *server = NFS_SERVER(dir);
2677 struct nfs4_opendata *opendata;
2678 struct dentry *dentry = ctx->dentry;
2679 struct rpc_cred *cred = ctx->cred;
2680 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2681 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
2682 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
2683 struct nfs4_label *olabel = NULL;
2686 /* Protect against reboot recovery conflicts */
2688 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2690 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2693 status = nfs4_client_recover_expired_lease(server->nfs_client);
2695 goto err_put_state_owner;
2696 if (d_really_is_positive(dentry))
2697 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
2699 if (d_really_is_positive(dentry))
2700 claim = NFS4_OPEN_CLAIM_FH;
2701 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
2702 label, claim, GFP_KERNEL);
2703 if (opendata == NULL)
2704 goto err_put_state_owner;
2707 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2708 if (IS_ERR(olabel)) {
2709 status = PTR_ERR(olabel);
2710 goto err_opendata_put;
2714 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2715 if (!opendata->f_attr.mdsthreshold) {
2716 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2717 if (!opendata->f_attr.mdsthreshold)
2718 goto err_free_label;
2720 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
2722 if (d_really_is_positive(dentry))
2723 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
2725 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
2727 goto err_free_label;
2730 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
2731 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
2732 nfs4_exclusive_attrset(opendata, sattr, &label);
2734 * send create attributes which was not set by open
2735 * with an extra setattr.
2737 if (sattr->ia_valid & NFS4_VALID_ATTRS) {
2738 nfs_fattr_init(opendata->o_res.f_attr);
2739 status = nfs4_do_setattr(state->inode, cred,
2740 opendata->o_res.f_attr, sattr,
2741 ctx, label, olabel);
2743 nfs_setattr_update_inode(state->inode, sattr,
2744 opendata->o_res.f_attr);
2745 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2749 if (opened && opendata->file_created)
2750 *opened |= FILE_CREATED;
2752 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
2753 *ctx_th = opendata->f_attr.mdsthreshold;
2754 opendata->f_attr.mdsthreshold = NULL;
2757 nfs4_label_free(olabel);
2759 nfs4_opendata_put(opendata);
2760 nfs4_put_state_owner(sp);
2763 nfs4_label_free(olabel);
2765 nfs4_opendata_put(opendata);
2766 err_put_state_owner:
2767 nfs4_put_state_owner(sp);
2773 static struct nfs4_state *nfs4_do_open(struct inode *dir,
2774 struct nfs_open_context *ctx,
2776 struct iattr *sattr,
2777 struct nfs4_label *label,
2780 struct nfs_server *server = NFS_SERVER(dir);
2781 struct nfs4_exception exception = { };
2782 struct nfs4_state *res;
2786 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
2788 trace_nfs4_open_file(ctx, flags, status);
2791 /* NOTE: BAD_SEQID means the server and client disagree about the
2792 * book-keeping w.r.t. state-changing operations
2793 * (OPEN/CLOSE/LOCK/LOCKU...)
2794 * It is actually a sign of a bug on the client or on the server.
2796 * If we receive a BAD_SEQID error in the particular case of
2797 * doing an OPEN, we assume that nfs_increment_open_seqid() will
2798 * have unhashed the old state_owner for us, and that we can
2799 * therefore safely retry using a new one. We should still warn
2800 * the user though...
2802 if (status == -NFS4ERR_BAD_SEQID) {
2803 pr_warn_ratelimited("NFS: v4 server %s "
2804 " returned a bad sequence-id error!\n",
2805 NFS_SERVER(dir)->nfs_client->cl_hostname);
2806 exception.retry = 1;
2810 * BAD_STATEID on OPEN means that the server cancelled our
2811 * state before it received the OPEN_CONFIRM.
2812 * Recover by retrying the request as per the discussion
2813 * on Page 181 of RFC3530.
2815 if (status == -NFS4ERR_BAD_STATEID) {
2816 exception.retry = 1;
2819 if (status == -EAGAIN) {
2820 /* We must have found a delegation */
2821 exception.retry = 1;
2824 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2826 res = ERR_PTR(nfs4_handle_exception(server,
2827 status, &exception));
2828 } while (exception.retry);
2832 static int _nfs4_do_setattr(struct inode *inode,
2833 struct nfs_setattrargs *arg,
2834 struct nfs_setattrres *res,
2835 struct rpc_cred *cred,
2836 struct nfs_open_context *ctx)
2838 struct nfs_server *server = NFS_SERVER(inode);
2839 struct rpc_message msg = {
2840 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2845 struct rpc_cred *delegation_cred = NULL;
2846 unsigned long timestamp = jiffies;
2851 nfs_fattr_init(res->fattr);
2853 /* Servers should only apply open mode checks for file size changes */
2854 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false;
2855 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2857 if (nfs4_copy_delegation_stateid(inode, fmode, &arg->stateid, &delegation_cred)) {
2858 /* Use that stateid */
2859 } else if (truncate && ctx != NULL) {
2860 struct nfs_lock_context *l_ctx;
2861 if (!nfs4_valid_open_stateid(ctx->state))
2863 l_ctx = nfs_get_lock_context(ctx);
2865 return PTR_ERR(l_ctx);
2866 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx,
2867 &arg->stateid, &delegation_cred);
2868 nfs_put_lock_context(l_ctx);
2872 nfs4_stateid_copy(&arg->stateid, &zero_stateid);
2873 if (delegation_cred)
2874 msg.rpc_cred = delegation_cred;
2876 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1);
2878 put_rpccred(delegation_cred);
2879 if (status == 0 && ctx != NULL)
2880 renew_lease(server, timestamp);
2881 trace_nfs4_setattr(inode, &arg->stateid, status);
2885 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2886 struct nfs_fattr *fattr, struct iattr *sattr,
2887 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
2888 struct nfs4_label *olabel)
2890 struct nfs_server *server = NFS_SERVER(inode);
2891 struct nfs4_state *state = ctx ? ctx->state : NULL;
2892 struct nfs_setattrargs arg = {
2893 .fh = NFS_FH(inode),
2896 .bitmask = server->attr_bitmask,
2899 struct nfs_setattrres res = {
2904 struct nfs4_exception exception = {
2907 .stateid = &arg.stateid,
2911 arg.bitmask = nfs4_bitmask(server, ilabel);
2913 arg.bitmask = nfs4_bitmask(server, olabel);
2916 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx);
2918 case -NFS4ERR_OPENMODE:
2919 if (!(sattr->ia_valid & ATTR_SIZE)) {
2920 pr_warn_once("NFSv4: server %s is incorrectly "
2921 "applying open mode checks to "
2922 "a SETATTR that is not "
2923 "changing file size.\n",
2924 server->nfs_client->cl_hostname);
2926 if (state && !(state->state & FMODE_WRITE)) {
2928 if (sattr->ia_valid & ATTR_OPEN)
2933 err = nfs4_handle_exception(server, err, &exception);
2934 } while (exception.retry);
2940 nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
2942 if (inode == NULL || !nfs_have_layout(inode))
2945 return pnfs_wait_on_layoutreturn(inode, task);
2948 struct nfs4_closedata {
2949 struct inode *inode;
2950 struct nfs4_state *state;
2951 struct nfs_closeargs arg;
2952 struct nfs_closeres res;
2954 struct nfs4_layoutreturn_args arg;
2955 struct nfs4_layoutreturn_res res;
2956 struct nfs4_xdr_opaque_data ld_private;
2960 struct nfs_fattr fattr;
2961 unsigned long timestamp;
2964 static void nfs4_free_closedata(void *data)
2966 struct nfs4_closedata *calldata = data;
2967 struct nfs4_state_owner *sp = calldata->state->owner;
2968 struct super_block *sb = calldata->state->inode->i_sb;
2970 if (calldata->lr.roc)
2971 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res,
2972 calldata->res.lr_ret);
2973 nfs4_put_open_state(calldata->state);
2974 nfs_free_seqid(calldata->arg.seqid);
2975 nfs4_put_state_owner(sp);
2976 nfs_sb_deactive(sb);
2980 static void nfs4_close_done(struct rpc_task *task, void *data)
2982 struct nfs4_closedata *calldata = data;
2983 struct nfs4_state *state = calldata->state;
2984 struct nfs_server *server = NFS_SERVER(calldata->inode);
2985 nfs4_stateid *res_stateid = NULL;
2987 dprintk("%s: begin!\n", __func__);
2988 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2990 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
2992 /* Handle Layoutreturn errors */
2993 if (calldata->arg.lr_args && task->tk_status != 0) {
2994 switch (calldata->res.lr_ret) {
2996 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
2999 calldata->arg.lr_args = NULL;
3000 calldata->res.lr_res = NULL;
3002 case -NFS4ERR_ADMIN_REVOKED:
3003 case -NFS4ERR_DELEG_REVOKED:
3004 case -NFS4ERR_EXPIRED:
3005 case -NFS4ERR_BAD_STATEID:
3006 case -NFS4ERR_OLD_STATEID:
3007 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
3008 case -NFS4ERR_WRONG_CRED:
3009 calldata->arg.lr_args = NULL;
3010 calldata->res.lr_res = NULL;
3011 calldata->res.lr_ret = 0;
3012 rpc_restart_call_prepare(task);
3017 /* hmm. we are done with the inode, and in the process of freeing
3018 * the state_owner. we keep this around to process errors
3020 switch (task->tk_status) {
3022 res_stateid = &calldata->res.stateid;
3023 renew_lease(server, calldata->timestamp);
3025 case -NFS4ERR_ACCESS:
3026 if (calldata->arg.bitmask != NULL) {
3027 calldata->arg.bitmask = NULL;
3028 calldata->res.fattr = NULL;
3029 task->tk_status = 0;
3030 rpc_restart_call_prepare(task);
3035 case -NFS4ERR_ADMIN_REVOKED:
3036 case -NFS4ERR_STALE_STATEID:
3037 case -NFS4ERR_EXPIRED:
3038 nfs4_free_revoked_stateid(server,
3039 &calldata->arg.stateid,
3040 task->tk_msg.rpc_cred);
3041 case -NFS4ERR_OLD_STATEID:
3042 case -NFS4ERR_BAD_STATEID:
3043 if (!nfs4_stateid_match(&calldata->arg.stateid,
3044 &state->open_stateid)) {
3045 rpc_restart_call_prepare(task);
3048 if (calldata->arg.fmode == 0)
3051 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
3052 rpc_restart_call_prepare(task);
3056 nfs_clear_open_stateid(state, &calldata->arg.stateid,
3057 res_stateid, calldata->arg.fmode);
3059 nfs_release_seqid(calldata->arg.seqid);
3060 nfs_refresh_inode(calldata->inode, &calldata->fattr);
3061 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
3064 static void nfs4_close_prepare(struct rpc_task *task, void *data)
3066 struct nfs4_closedata *calldata = data;
3067 struct nfs4_state *state = calldata->state;
3068 struct inode *inode = calldata->inode;
3069 bool is_rdonly, is_wronly, is_rdwr;
3072 dprintk("%s: begin!\n", __func__);
3073 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3076 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
3077 spin_lock(&state->owner->so_lock);
3078 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
3079 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
3080 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
3081 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
3082 /* Calculate the change in open mode */
3083 calldata->arg.fmode = 0;
3084 if (state->n_rdwr == 0) {
3085 if (state->n_rdonly == 0)
3086 call_close |= is_rdonly;
3088 calldata->arg.fmode |= FMODE_READ;
3089 if (state->n_wronly == 0)
3090 call_close |= is_wronly;
3092 calldata->arg.fmode |= FMODE_WRITE;
3093 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
3094 call_close |= is_rdwr;
3096 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
3098 if (!nfs4_valid_open_stateid(state) ||
3099 test_bit(NFS_OPEN_STATE, &state->flags) == 0)
3101 spin_unlock(&state->owner->so_lock);
3104 /* Note: exit _without_ calling nfs4_close_done */
3108 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) {
3109 nfs_release_seqid(calldata->arg.seqid);
3113 if (calldata->arg.fmode == 0)
3114 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3116 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) {
3117 /* Close-to-open cache consistency revalidation */
3118 if (!nfs4_have_delegation(inode, FMODE_READ))
3119 calldata->arg.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask;
3121 calldata->arg.bitmask = NULL;
3124 calldata->arg.share_access =
3125 nfs4_map_atomic_open_share(NFS_SERVER(inode),
3126 calldata->arg.fmode, 0);
3128 if (calldata->res.fattr == NULL)
3129 calldata->arg.bitmask = NULL;
3130 else if (calldata->arg.bitmask == NULL)
3131 calldata->res.fattr = NULL;
3132 calldata->timestamp = jiffies;
3133 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client,
3134 &calldata->arg.seq_args,
3135 &calldata->res.seq_res,
3137 nfs_release_seqid(calldata->arg.seqid);
3138 dprintk("%s: done!\n", __func__);
3141 task->tk_action = NULL;
3143 nfs4_sequence_done(task, &calldata->res.seq_res);
3146 static const struct rpc_call_ops nfs4_close_ops = {
3147 .rpc_call_prepare = nfs4_close_prepare,
3148 .rpc_call_done = nfs4_close_done,
3149 .rpc_release = nfs4_free_closedata,
3153 * It is possible for data to be read/written from a mem-mapped file
3154 * after the sys_close call (which hits the vfs layer as a flush).
3155 * This means that we can't safely call nfsv4 close on a file until
3156 * the inode is cleared. This in turn means that we are not good
3157 * NFSv4 citizens - we do not indicate to the server to update the file's
3158 * share state even when we are done with one of the three share
3159 * stateid's in the inode.
3161 * NOTE: Caller must be holding the sp->so_owner semaphore!
3163 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
3165 struct nfs_server *server = NFS_SERVER(state->inode);
3166 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
3167 struct nfs4_closedata *calldata;
3168 struct nfs4_state_owner *sp = state->owner;
3169 struct rpc_task *task;
3170 struct rpc_message msg = {
3171 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
3172 .rpc_cred = state->owner->so_cred,
3174 struct rpc_task_setup task_setup_data = {
3175 .rpc_client = server->client,
3176 .rpc_message = &msg,
3177 .callback_ops = &nfs4_close_ops,
3178 .workqueue = nfsiod_workqueue,
3179 .flags = RPC_TASK_ASYNC,
3181 int status = -ENOMEM;
3183 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
3184 &task_setup_data.rpc_client, &msg);
3186 calldata = kzalloc(sizeof(*calldata), gfp_mask);
3187 if (calldata == NULL)
3189 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
3190 calldata->inode = state->inode;
3191 calldata->state = state;
3192 calldata->arg.fh = NFS_FH(state->inode);
3193 /* Serialization for the sequence id */
3194 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
3195 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
3196 if (IS_ERR(calldata->arg.seqid))
3197 goto out_free_calldata;
3198 nfs_fattr_init(&calldata->fattr);
3199 calldata->arg.fmode = 0;
3200 calldata->lr.arg.ld_private = &calldata->lr.ld_private;
3201 calldata->res.fattr = &calldata->fattr;
3202 calldata->res.seqid = calldata->arg.seqid;
3203 calldata->res.server = server;
3204 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
3205 calldata->lr.roc = pnfs_roc(state->inode,
3206 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred);
3207 if (calldata->lr.roc) {
3208 calldata->arg.lr_args = &calldata->lr.arg;
3209 calldata->res.lr_res = &calldata->lr.res;
3211 nfs_sb_active(calldata->inode->i_sb);
3213 msg.rpc_argp = &calldata->arg;
3214 msg.rpc_resp = &calldata->res;
3215 task_setup_data.callback_data = calldata;
3216 task = rpc_run_task(&task_setup_data);
3218 return PTR_ERR(task);
3221 status = rpc_wait_for_completion_task(task);
3227 nfs4_put_open_state(state);
3228 nfs4_put_state_owner(sp);
3232 static struct inode *
3233 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3234 int open_flags, struct iattr *attr, int *opened)
3236 struct nfs4_state *state;
3237 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
3239 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
3241 /* Protect against concurrent sillydeletes */
3242 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
3244 nfs4_label_release_security(label);
3247 return ERR_CAST(state);
3248 return state->inode;
3251 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
3253 if (ctx->state == NULL)
3256 nfs4_close_sync(ctx->state, ctx->mode);
3258 nfs4_close_state(ctx->state, ctx->mode);
3261 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3262 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
3263 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_MODE_UMASK - 1UL)
3265 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3267 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
3268 struct nfs4_server_caps_arg args = {
3272 struct nfs4_server_caps_res res = {};
3273 struct rpc_message msg = {
3274 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
3281 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3282 FATTR4_WORD0_FH_EXPIRE_TYPE |
3283 FATTR4_WORD0_LINK_SUPPORT |
3284 FATTR4_WORD0_SYMLINK_SUPPORT |
3285 FATTR4_WORD0_ACLSUPPORT;
3287 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3289 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3291 /* Sanity check the server answers */
3292 switch (minorversion) {
3294 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3295 res.attr_bitmask[2] = 0;
3298 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3301 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3303 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
3304 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3305 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3306 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3307 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
3308 NFS_CAP_CTIME|NFS_CAP_MTIME|
3309 NFS_CAP_SECURITY_LABEL);
3310 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3311 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3312 server->caps |= NFS_CAP_ACLS;
3313 if (res.has_links != 0)
3314 server->caps |= NFS_CAP_HARDLINKS;
3315 if (res.has_symlinks != 0)
3316 server->caps |= NFS_CAP_SYMLINKS;
3317 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3318 server->caps |= NFS_CAP_FILEID;
3319 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3320 server->caps |= NFS_CAP_MODE;
3321 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3322 server->caps |= NFS_CAP_NLINK;
3323 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3324 server->caps |= NFS_CAP_OWNER;
3325 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3326 server->caps |= NFS_CAP_OWNER_GROUP;
3327 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3328 server->caps |= NFS_CAP_ATIME;
3329 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3330 server->caps |= NFS_CAP_CTIME;
3331 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3332 server->caps |= NFS_CAP_MTIME;
3333 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
3334 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3335 server->caps |= NFS_CAP_SECURITY_LABEL;
3337 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3338 sizeof(server->attr_bitmask));
3339 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
3341 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3342 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3343 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
3344 server->cache_consistency_bitmask[2] = 0;
3346 /* Avoid a regression due to buggy server */
3347 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++)
3348 res.exclcreat_bitmask[i] &= res.attr_bitmask[i];
3349 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3350 sizeof(server->exclcreat_bitmask));
3352 server->acl_bitmask = res.acl_bitmask;
3353 server->fh_expire_type = res.fh_expire_type;
3359 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3361 struct nfs4_exception exception = { };
3364 err = nfs4_handle_exception(server,
3365 _nfs4_server_capabilities(server, fhandle),
3367 } while (exception.retry);
3371 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3372 struct nfs_fsinfo *info)
3375 struct nfs4_lookup_root_arg args = {
3378 struct nfs4_lookup_res res = {
3380 .fattr = info->fattr,
3383 struct rpc_message msg = {
3384 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3389 bitmask[0] = nfs4_fattr_bitmap[0];
3390 bitmask[1] = nfs4_fattr_bitmap[1];
3392 * Process the label in the upcoming getfattr
3394 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3396 nfs_fattr_init(info->fattr);
3397 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3400 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3401 struct nfs_fsinfo *info)
3403 struct nfs4_exception exception = { };
3406 err = _nfs4_lookup_root(server, fhandle, info);
3407 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
3410 case -NFS4ERR_WRONGSEC:
3413 err = nfs4_handle_exception(server, err, &exception);
3415 } while (exception.retry);
3420 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3421 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3423 struct rpc_auth_create_args auth_args = {
3424 .pseudoflavor = flavor,
3426 struct rpc_auth *auth;
3428 auth = rpcauth_create(&auth_args, server->client);