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)
281 readdir->cookie = cookie;
282 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
287 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
292 * NFSv4 servers do not return entries for '.' and '..'
293 * Therefore, we fake these entries here. We let '.'
294 * have cookie 0 and '..' have cookie 1. Note that
295 * when talking to the server, we always send cookie 0
298 start = p = kmap_atomic(*readdir->pages);
301 *p++ = xdr_one; /* next */
302 *p++ = xdr_zero; /* cookie, first word */
303 *p++ = xdr_one; /* cookie, second word */
304 *p++ = xdr_one; /* entry len */
305 memcpy(p, ".\0\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(d_inode(dentry)));
313 *p++ = xdr_one; /* next */
314 *p++ = xdr_zero; /* cookie, first word */
315 *p++ = xdr_two; /* cookie, second word */
316 *p++ = xdr_two; /* entry len */
317 memcpy(p, "..\0\0", 4); /* entry */
319 *p++ = xdr_one; /* bitmap length */
320 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
321 *p++ = htonl(8); /* attribute buffer length */
322 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
324 readdir->pgbase = (char *)p - (char *)start;
325 readdir->count -= readdir->pgbase;
326 kunmap_atomic(start);
329 static void nfs4_test_and_free_stateid(struct nfs_server *server,
330 nfs4_stateid *stateid,
331 struct rpc_cred *cred)
333 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops;
335 ops->test_and_free_expired(server, stateid, cred);
338 static void __nfs4_free_revoked_stateid(struct nfs_server *server,
339 nfs4_stateid *stateid,
340 struct rpc_cred *cred)
342 stateid->type = NFS4_REVOKED_STATEID_TYPE;
343 nfs4_test_and_free_stateid(server, stateid, cred);
346 static void nfs4_free_revoked_stateid(struct nfs_server *server,
347 const nfs4_stateid *stateid,
348 struct rpc_cred *cred)
352 nfs4_stateid_copy(&tmp, stateid);
353 __nfs4_free_revoked_stateid(server, &tmp, cred);
356 static long nfs4_update_delay(long *timeout)
360 return NFS4_POLL_RETRY_MAX;
362 *timeout = NFS4_POLL_RETRY_MIN;
363 if (*timeout > NFS4_POLL_RETRY_MAX)
364 *timeout = NFS4_POLL_RETRY_MAX;
370 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
376 freezable_schedule_timeout_killable_unsafe(
377 nfs4_update_delay(timeout));
378 if (fatal_signal_pending(current))
383 /* This is the error handling routine for processes that are allowed
386 static int nfs4_do_handle_exception(struct nfs_server *server,
387 int errorcode, struct nfs4_exception *exception)
389 struct nfs_client *clp = server->nfs_client;
390 struct nfs4_state *state = exception->state;
391 const nfs4_stateid *stateid = exception->stateid;
392 struct inode *inode = exception->inode;
395 exception->delay = 0;
396 exception->recovering = 0;
397 exception->retry = 0;
399 if (stateid == NULL && state != NULL)
400 stateid = &state->stateid;
405 case -NFS4ERR_DELEG_REVOKED:
406 case -NFS4ERR_ADMIN_REVOKED:
407 case -NFS4ERR_EXPIRED:
408 case -NFS4ERR_BAD_STATEID:
409 if (inode != NULL && stateid != NULL) {
410 nfs_inode_find_state_and_recover(inode,
412 goto wait_on_recovery;
414 case -NFS4ERR_OPENMODE:
418 err = nfs_async_inode_return_delegation(inode,
421 goto wait_on_recovery;
422 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) {
423 exception->retry = 1;
429 ret = nfs4_schedule_stateid_recovery(server, state);
432 goto wait_on_recovery;
433 case -NFS4ERR_STALE_STATEID:
434 case -NFS4ERR_STALE_CLIENTID:
435 nfs4_schedule_lease_recovery(clp);
436 goto wait_on_recovery;
438 ret = nfs4_schedule_migration_recovery(server);
441 goto wait_on_recovery;
442 case -NFS4ERR_LEASE_MOVED:
443 nfs4_schedule_lease_moved_recovery(clp);
444 goto wait_on_recovery;
445 #if defined(CONFIG_NFS_V4_1)
446 case -NFS4ERR_BADSESSION:
447 case -NFS4ERR_BADSLOT:
448 case -NFS4ERR_BAD_HIGH_SLOT:
449 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
450 case -NFS4ERR_DEADSESSION:
451 case -NFS4ERR_SEQ_FALSE_RETRY:
452 case -NFS4ERR_SEQ_MISORDERED:
453 dprintk("%s ERROR: %d Reset session\n", __func__,
455 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
456 goto wait_on_recovery;
457 #endif /* defined(CONFIG_NFS_V4_1) */
458 case -NFS4ERR_FILE_OPEN:
459 if (exception->timeout > HZ) {
460 /* We have retried a decent amount, time to
467 nfs_inc_server_stats(server, NFSIOS_DELAY);
469 case -NFS4ERR_LAYOUTTRYLATER:
470 case -NFS4ERR_RECALLCONFLICT:
471 exception->delay = 1;
474 case -NFS4ERR_RETRY_UNCACHED_REP:
475 case -NFS4ERR_OLD_STATEID:
476 exception->retry = 1;
478 case -NFS4ERR_BADOWNER:
479 /* The following works around a Linux server bug! */
480 case -NFS4ERR_BADNAME:
481 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
482 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
483 exception->retry = 1;
484 printk(KERN_WARNING "NFS: v4 server %s "
485 "does not accept raw "
487 "Reenabling the idmapper.\n",
488 server->nfs_client->cl_hostname);
491 /* We failed to handle the error */
492 return nfs4_map_errors(ret);
494 exception->recovering = 1;
498 /* This is the error handling routine for processes that are allowed
501 int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
503 struct nfs_client *clp = server->nfs_client;
506 ret = nfs4_do_handle_exception(server, errorcode, exception);
507 if (exception->delay) {
508 ret = nfs4_delay(server->client, &exception->timeout);
511 if (exception->recovering) {
512 ret = nfs4_wait_clnt_recover(clp);
513 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
520 exception->retry = 1;
525 nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
526 int errorcode, struct nfs4_exception *exception)
528 struct nfs_client *clp = server->nfs_client;
531 ret = nfs4_do_handle_exception(server, errorcode, exception);
532 if (exception->delay) {
533 rpc_delay(task, nfs4_update_delay(&exception->timeout));
536 if (exception->recovering) {
537 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
538 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
539 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
542 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
547 exception->retry = 1;
552 nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
553 struct nfs4_state *state, long *timeout)
555 struct nfs4_exception exception = {
559 if (task->tk_status >= 0)
562 exception.timeout = *timeout;
563 task->tk_status = nfs4_async_handle_exception(task, server,
566 if (exception.delay && timeout)
567 *timeout = exception.timeout;
574 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
575 * or 'false' otherwise.
577 static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
579 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
580 return (flavor == RPC_AUTH_GSS_KRB5I) || (flavor == RPC_AUTH_GSS_KRB5P);
583 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
585 spin_lock(&clp->cl_lock);
586 if (time_before(clp->cl_last_renewal,timestamp))
587 clp->cl_last_renewal = timestamp;
588 spin_unlock(&clp->cl_lock);
591 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
593 struct nfs_client *clp = server->nfs_client;
595 if (!nfs4_has_session(clp))
596 do_renew_lease(clp, timestamp);
599 struct nfs4_call_sync_data {
600 const struct nfs_server *seq_server;
601 struct nfs4_sequence_args *seq_args;
602 struct nfs4_sequence_res *seq_res;
605 void nfs4_init_sequence(struct nfs4_sequence_args *args,
606 struct nfs4_sequence_res *res, int cache_reply)
608 args->sa_slot = NULL;
609 args->sa_cache_this = cache_reply;
610 args->sa_privileged = 0;
615 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
617 args->sa_privileged = 1;
620 static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res)
622 struct nfs4_slot *slot = res->sr_slot;
623 struct nfs4_slot_table *tbl;
626 spin_lock(&tbl->slot_tbl_lock);
627 if (!nfs41_wake_and_assign_slot(tbl, slot))
628 nfs4_free_slot(tbl, slot);
629 spin_unlock(&tbl->slot_tbl_lock);
634 static int nfs40_sequence_done(struct rpc_task *task,
635 struct nfs4_sequence_res *res)
637 if (res->sr_slot != NULL)
638 nfs40_sequence_free_slot(res);
642 #if defined(CONFIG_NFS_V4_1)
644 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
646 struct nfs4_session *session;
647 struct nfs4_slot_table *tbl;
648 struct nfs4_slot *slot = res->sr_slot;
649 bool send_new_highest_used_slotid = false;
652 session = tbl->session;
654 /* Bump the slot sequence number */
659 spin_lock(&tbl->slot_tbl_lock);
660 /* Be nice to the server: try to ensure that the last transmitted
661 * value for highest_user_slotid <= target_highest_slotid
663 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
664 send_new_highest_used_slotid = true;
666 if (nfs41_wake_and_assign_slot(tbl, slot)) {
667 send_new_highest_used_slotid = false;
670 nfs4_free_slot(tbl, slot);
672 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
673 send_new_highest_used_slotid = false;
675 spin_unlock(&tbl->slot_tbl_lock);
677 if (send_new_highest_used_slotid)
678 nfs41_notify_server(session->clp);
679 if (waitqueue_active(&tbl->slot_waitq))
680 wake_up_all(&tbl->slot_waitq);
683 static int nfs41_sequence_process(struct rpc_task *task,
684 struct nfs4_sequence_res *res)
686 struct nfs4_session *session;
687 struct nfs4_slot *slot = res->sr_slot;
688 struct nfs_client *clp;
689 bool interrupted = false;
694 /* don't increment the sequence number if the task wasn't sent */
695 if (!RPC_WAS_SENT(task))
698 session = slot->table->session;
700 if (slot->interrupted) {
701 if (res->sr_status != -NFS4ERR_DELAY)
702 slot->interrupted = 0;
706 trace_nfs4_sequence_done(session, res);
707 /* Check the SEQUENCE operation status */
708 switch (res->sr_status) {
710 /* If previous op on slot was interrupted and we reused
711 * the seq# and got a reply from the cache, then retry
713 if (task->tk_status == -EREMOTEIO && interrupted) {
717 /* Update the slot's sequence and clientid lease timer */
720 do_renew_lease(clp, res->sr_timestamp);
721 /* Check sequence flags */
722 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags,
724 nfs41_update_target_slotid(slot->table, slot, res);
728 * sr_status remains 1 if an RPC level error occurred.
729 * The server may or may not have processed the sequence
731 * Mark the slot as having hosted an interrupted RPC call.
733 slot->interrupted = 1;
736 /* The server detected a resend of the RPC call and
737 * returned NFS4ERR_DELAY as per Section 2.10.6.2
740 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
745 case -NFS4ERR_BADSLOT:
747 * The slot id we used was probably retired. Try again
748 * using a different slot id.
751 case -NFS4ERR_SEQ_MISORDERED:
753 * Was the last operation on this sequence interrupted?
754 * If so, retry after bumping the sequence number.
761 * Could this slot have been previously retired?
762 * If so, then the server may be expecting seq_nr = 1!
764 if (slot->seq_nr != 1) {
769 case -NFS4ERR_SEQ_FALSE_RETRY:
773 /* Just update the slot sequence no. */
777 /* The session may be reset by one of the error handlers. */
778 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
782 if (rpc_restart_call_prepare(task)) {
783 nfs41_sequence_free_slot(res);
789 if (!rpc_restart_call(task))
791 rpc_delay(task, NFS4_POLL_RETRY_MAX);
795 int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
797 if (!nfs41_sequence_process(task, res))
799 if (res->sr_slot != NULL)
800 nfs41_sequence_free_slot(res);
804 EXPORT_SYMBOL_GPL(nfs41_sequence_done);
806 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
808 if (res->sr_slot == NULL)
810 if (res->sr_slot->table->session != NULL)
811 return nfs41_sequence_process(task, res);
812 return nfs40_sequence_done(task, res);
815 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
817 if (res->sr_slot != NULL) {
818 if (res->sr_slot->table->session != NULL)
819 nfs41_sequence_free_slot(res);
821 nfs40_sequence_free_slot(res);
825 int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
827 if (res->sr_slot == NULL)
829 if (!res->sr_slot->table->session)
830 return nfs40_sequence_done(task, res);
831 return nfs41_sequence_done(task, res);
833 EXPORT_SYMBOL_GPL(nfs4_sequence_done);
835 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
837 struct nfs4_call_sync_data *data = calldata;
839 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
841 nfs4_setup_sequence(data->seq_server->nfs_client,
842 data->seq_args, data->seq_res, task);
845 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
847 struct nfs4_call_sync_data *data = calldata;
849 nfs41_sequence_done(task, data->seq_res);
852 static const struct rpc_call_ops nfs41_call_sync_ops = {
853 .rpc_call_prepare = nfs41_call_sync_prepare,
854 .rpc_call_done = nfs41_call_sync_done,
857 #else /* !CONFIG_NFS_V4_1 */
859 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
861 return nfs40_sequence_done(task, res);
864 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
866 if (res->sr_slot != NULL)
867 nfs40_sequence_free_slot(res);
870 int nfs4_sequence_done(struct rpc_task *task,
871 struct nfs4_sequence_res *res)
873 return nfs40_sequence_done(task, res);
875 EXPORT_SYMBOL_GPL(nfs4_sequence_done);
877 #endif /* !CONFIG_NFS_V4_1 */
879 int nfs4_setup_sequence(const struct nfs_client *client,
880 struct nfs4_sequence_args *args,
881 struct nfs4_sequence_res *res,
882 struct rpc_task *task)
884 struct nfs4_session *session = nfs4_get_session(client);
885 struct nfs4_slot_table *tbl = client->cl_slot_tbl;
886 struct nfs4_slot *slot;
888 /* slot already allocated? */
889 if (res->sr_slot != NULL)
893 tbl = &session->fc_slot_table;
894 task->tk_timeout = 0;
897 spin_lock(&tbl->slot_tbl_lock);
898 /* The state manager will wait until the slot table is empty */
899 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
902 slot = nfs4_alloc_slot(tbl);
904 /* Try again in 1/4 second */
905 if (slot == ERR_PTR(-ENOMEM))
906 task->tk_timeout = HZ >> 2;
909 spin_unlock(&tbl->slot_tbl_lock);
911 slot->privileged = args->sa_privileged ? 1 : 0;
912 args->sa_slot = slot;
916 res->sr_timestamp = jiffies;
917 res->sr_status_flags = 0;
921 trace_nfs4_setup_sequence(session, args);
923 rpc_call_start(task);
927 if (args->sa_privileged)
928 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
929 NULL, RPC_PRIORITY_PRIVILEGED);
931 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
932 spin_unlock(&tbl->slot_tbl_lock);
935 EXPORT_SYMBOL_GPL(nfs4_setup_sequence);
937 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
939 struct nfs4_call_sync_data *data = calldata;
940 nfs4_setup_sequence(data->seq_server->nfs_client,
941 data->seq_args, data->seq_res, task);
944 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
946 struct nfs4_call_sync_data *data = calldata;
947 nfs4_sequence_done(task, data->seq_res);
950 static const struct rpc_call_ops nfs40_call_sync_ops = {
951 .rpc_call_prepare = nfs40_call_sync_prepare,
952 .rpc_call_done = nfs40_call_sync_done,
955 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
956 struct nfs_server *server,
957 struct rpc_message *msg,
958 struct nfs4_sequence_args *args,
959 struct nfs4_sequence_res *res)
962 struct rpc_task *task;
963 struct nfs_client *clp = server->nfs_client;
964 struct nfs4_call_sync_data data = {
965 .seq_server = server,
969 struct rpc_task_setup task_setup = {
972 .callback_ops = clp->cl_mvops->call_sync_ops,
973 .callback_data = &data
976 task = rpc_run_task(&task_setup);
980 ret = task->tk_status;
986 int nfs4_call_sync(struct rpc_clnt *clnt,
987 struct nfs_server *server,
988 struct rpc_message *msg,
989 struct nfs4_sequence_args *args,
990 struct nfs4_sequence_res *res,
993 nfs4_init_sequence(args, res, cache_reply);
994 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
997 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo,
998 unsigned long timestamp)
1000 struct nfs_inode *nfsi = NFS_I(dir);
1002 spin_lock(&dir->i_lock);
1003 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1004 if (cinfo->atomic && cinfo->before == dir->i_version) {
1005 nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE;
1006 nfsi->attrtimeo_timestamp = jiffies;
1008 nfs_force_lookup_revalidate(dir);
1009 if (cinfo->before != dir->i_version)
1010 nfsi->cache_validity |= NFS_INO_INVALID_ACCESS |
1011 NFS_INO_INVALID_ACL;
1013 dir->i_version = cinfo->after;
1014 nfsi->read_cache_jiffies = timestamp;
1015 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
1016 nfs_fscache_invalidate(dir);
1017 spin_unlock(&dir->i_lock);
1020 struct nfs4_opendata {
1022 struct nfs_openargs o_arg;
1023 struct nfs_openres o_res;
1024 struct nfs_open_confirmargs c_arg;
1025 struct nfs_open_confirmres c_res;
1026 struct nfs4_string owner_name;
1027 struct nfs4_string group_name;
1028 struct nfs4_label *a_label;
1029 struct nfs_fattr f_attr;
1030 struct nfs4_label *f_label;
1032 struct dentry *dentry;
1033 struct nfs4_state_owner *owner;
1034 struct nfs4_state *state;
1036 unsigned long timestamp;
1037 unsigned int rpc_done : 1;
1038 unsigned int file_created : 1;
1039 unsigned int is_recover : 1;
1044 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1045 int err, struct nfs4_exception *exception)
1049 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1051 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1052 exception->retry = 1;
1057 nfs4_map_atomic_open_share(struct nfs_server *server,
1058 fmode_t fmode, int openflags)
1062 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1064 res = NFS4_SHARE_ACCESS_READ;
1067 res = NFS4_SHARE_ACCESS_WRITE;
1069 case FMODE_READ|FMODE_WRITE:
1070 res = NFS4_SHARE_ACCESS_BOTH;
1072 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1074 /* Want no delegation if we're using O_DIRECT */
1075 if (openflags & O_DIRECT)
1076 res |= NFS4_SHARE_WANT_NO_DELEG;
1081 static enum open_claim_type4
1082 nfs4_map_atomic_open_claim(struct nfs_server *server,
1083 enum open_claim_type4 claim)
1085 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1090 case NFS4_OPEN_CLAIM_FH:
1091 return NFS4_OPEN_CLAIM_NULL;
1092 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1093 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1094 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1095 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1099 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1101 p->o_res.f_attr = &p->f_attr;
1102 p->o_res.f_label = p->f_label;
1103 p->o_res.seqid = p->o_arg.seqid;
1104 p->c_res.seqid = p->c_arg.seqid;
1105 p->o_res.server = p->o_arg.server;
1106 p->o_res.access_request = p->o_arg.access;
1107 nfs_fattr_init(&p->f_attr);
1108 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
1111 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
1112 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
1113 const struct iattr *attrs,
1114 struct nfs4_label *label,
1115 enum open_claim_type4 claim,
1118 struct dentry *parent = dget_parent(dentry);
1119 struct inode *dir = d_inode(parent);
1120 struct nfs_server *server = NFS_SERVER(dir);
1121 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1122 struct nfs4_opendata *p;
1124 p = kzalloc(sizeof(*p), gfp_mask);
1128 p->f_label = nfs4_label_alloc(server, gfp_mask);
1129 if (IS_ERR(p->f_label))
1132 p->a_label = nfs4_label_alloc(server, gfp_mask);
1133 if (IS_ERR(p->a_label))
1136 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1137 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
1138 if (IS_ERR(p->o_arg.seqid))
1139 goto err_free_label;
1140 nfs_sb_active(dentry->d_sb);
1141 p->dentry = dget(dentry);
1144 atomic_inc(&sp->so_count);
1145 p->o_arg.open_flags = flags;
1146 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
1147 p->o_arg.umask = current_umask();
1148 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1149 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1151 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1152 * will return permission denied for all bits until close */
1153 if (!(flags & O_EXCL)) {
1154 /* ask server to check for all possible rights as results
1156 switch (p->o_arg.claim) {
1159 case NFS4_OPEN_CLAIM_NULL:
1160 case NFS4_OPEN_CLAIM_FH:
1161 p->o_arg.access = NFS4_ACCESS_READ |
1162 NFS4_ACCESS_MODIFY |
1163 NFS4_ACCESS_EXTEND |
1164 NFS4_ACCESS_EXECUTE;
1167 p->o_arg.clientid = server->nfs_client->cl_clientid;
1168 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1169 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
1170 p->o_arg.name = &dentry->d_name;
1171 p->o_arg.server = server;
1172 p->o_arg.bitmask = nfs4_bitmask(server, label);
1173 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1174 p->o_arg.label = nfs4_label_copy(p->a_label, label);
1175 switch (p->o_arg.claim) {
1176 case NFS4_OPEN_CLAIM_NULL:
1177 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1178 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1179 p->o_arg.fh = NFS_FH(dir);
1181 case NFS4_OPEN_CLAIM_PREVIOUS:
1182 case NFS4_OPEN_CLAIM_FH:
1183 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1184 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1185 p->o_arg.fh = NFS_FH(d_inode(dentry));
1187 if (attrs != NULL && attrs->ia_valid != 0) {
1190 p->o_arg.u.attrs = &p->attrs;
1191 memcpy(&p->attrs, attrs, sizeof(p->attrs));
1194 verf[1] = current->pid;
1195 memcpy(p->o_arg.u.verifier.data, verf,
1196 sizeof(p->o_arg.u.verifier.data));
1198 p->c_arg.fh = &p->o_res.fh;
1199 p->c_arg.stateid = &p->o_res.stateid;
1200 p->c_arg.seqid = p->o_arg.seqid;
1201 nfs4_init_opendata_res(p);
1202 kref_init(&p->kref);
1206 nfs4_label_free(p->a_label);
1208 nfs4_label_free(p->f_label);
1216 static void nfs4_opendata_free(struct kref *kref)
1218 struct nfs4_opendata *p = container_of(kref,
1219 struct nfs4_opendata, kref);
1220 struct super_block *sb = p->dentry->d_sb;
1222 nfs_free_seqid(p->o_arg.seqid);
1223 nfs4_sequence_free_slot(&p->o_res.seq_res);
1224 if (p->state != NULL)
1225 nfs4_put_open_state(p->state);
1226 nfs4_put_state_owner(p->owner);
1228 nfs4_label_free(p->a_label);
1229 nfs4_label_free(p->f_label);
1233 nfs_sb_deactive(sb);
1234 nfs_fattr_free_names(&p->f_attr);
1235 kfree(p->f_attr.mdsthreshold);
1239 static void nfs4_opendata_put(struct nfs4_opendata *p)
1242 kref_put(&p->kref, nfs4_opendata_free);
1245 static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1248 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1249 case FMODE_READ|FMODE_WRITE:
1250 return state->n_rdwr != 0;
1252 return state->n_wronly != 0;
1254 return state->n_rdonly != 0;
1260 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
1264 if (open_mode & (O_EXCL|O_TRUNC))
1266 switch (mode & (FMODE_READ|FMODE_WRITE)) {
1268 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1269 && state->n_rdonly != 0;
1272 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1273 && state->n_wronly != 0;
1275 case FMODE_READ|FMODE_WRITE:
1276 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1277 && state->n_rdwr != 0;
1283 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1284 enum open_claim_type4 claim)
1286 if (delegation == NULL)
1288 if ((delegation->type & fmode) != fmode)
1290 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1293 case NFS4_OPEN_CLAIM_NULL:
1294 case NFS4_OPEN_CLAIM_FH:
1296 case NFS4_OPEN_CLAIM_PREVIOUS:
1297 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1302 nfs_mark_delegation_referenced(delegation);
1306 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
1315 case FMODE_READ|FMODE_WRITE:
1318 nfs4_state_set_mode_locked(state, state->state | fmode);
1321 #ifdef CONFIG_NFS_V4_1
1322 static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state)
1324 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags))
1326 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags))
1328 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags))
1332 #endif /* CONFIG_NFS_V4_1 */
1334 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1336 struct nfs_client *clp = state->owner->so_server->nfs_client;
1337 bool need_recover = false;
1339 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1340 need_recover = true;
1341 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1342 need_recover = true;
1343 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1344 need_recover = true;
1346 nfs4_state_mark_reclaim_nograce(clp, state);
1349 static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1350 const nfs4_stateid *stateid, nfs4_stateid *freeme)
1352 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1354 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1355 nfs4_stateid_copy(freeme, &state->open_stateid);
1356 nfs_test_and_clear_all_open_stateid(state);
1359 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1364 static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1366 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1368 if (state->n_wronly)
1369 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1370 if (state->n_rdonly)
1371 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1373 set_bit(NFS_O_RDWR_STATE, &state->flags);
1374 set_bit(NFS_OPEN_STATE, &state->flags);
1377 static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1378 nfs4_stateid *stateid, fmode_t fmode)
1380 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1381 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1383 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1386 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1389 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1390 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1391 clear_bit(NFS_OPEN_STATE, &state->flags);
1393 if (stateid == NULL)
1395 /* Handle OPEN+OPEN_DOWNGRADE races */
1396 if (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1397 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
1398 nfs_resync_open_stateid_locked(state);
1401 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1402 nfs4_stateid_copy(&state->stateid, stateid);
1403 nfs4_stateid_copy(&state->open_stateid, stateid);
1406 static void nfs_clear_open_stateid(struct nfs4_state *state,
1407 nfs4_stateid *arg_stateid,
1408 nfs4_stateid *stateid, fmode_t fmode)
1410 write_seqlock(&state->seqlock);
1411 /* Ignore, if the CLOSE argment doesn't match the current stateid */
1412 if (nfs4_state_match_open_stateid_other(state, arg_stateid))
1413 nfs_clear_open_stateid_locked(state, stateid, fmode);
1414 write_sequnlock(&state->seqlock);
1415 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1416 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1419 static void nfs_set_open_stateid_locked(struct nfs4_state *state,
1420 const nfs4_stateid *stateid, fmode_t fmode,
1421 nfs4_stateid *freeme)
1425 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1428 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1430 case FMODE_READ|FMODE_WRITE:
1431 set_bit(NFS_O_RDWR_STATE, &state->flags);
1433 if (!nfs_need_update_open_stateid(state, stateid, freeme))
1435 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1436 nfs4_stateid_copy(&state->stateid, stateid);
1437 nfs4_stateid_copy(&state->open_stateid, stateid);
1440 static void __update_open_stateid(struct nfs4_state *state,
1441 const nfs4_stateid *open_stateid,
1442 const nfs4_stateid *deleg_stateid,
1444 nfs4_stateid *freeme)
1447 * Protect the call to nfs4_state_set_mode_locked and
1448 * serialise the stateid update
1450 spin_lock(&state->owner->so_lock);
1451 write_seqlock(&state->seqlock);
1452 if (deleg_stateid != NULL) {
1453 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1454 set_bit(NFS_DELEGATED_STATE, &state->flags);
1456 if (open_stateid != NULL)
1457 nfs_set_open_stateid_locked(state, open_stateid, fmode, freeme);
1458 write_sequnlock(&state->seqlock);
1459 update_open_stateflags(state, fmode);
1460 spin_unlock(&state->owner->so_lock);
1463 static int update_open_stateid(struct nfs4_state *state,
1464 const nfs4_stateid *open_stateid,
1465 const nfs4_stateid *delegation,
1468 struct nfs_server *server = NFS_SERVER(state->inode);
1469 struct nfs_client *clp = server->nfs_client;
1470 struct nfs_inode *nfsi = NFS_I(state->inode);
1471 struct nfs_delegation *deleg_cur;
1472 nfs4_stateid freeme = { };
1475 fmode &= (FMODE_READ|FMODE_WRITE);
1478 deleg_cur = rcu_dereference(nfsi->delegation);
1479 if (deleg_cur == NULL)
1482 spin_lock(&deleg_cur->lock);
1483 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
1484 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
1485 (deleg_cur->type & fmode) != fmode)
1486 goto no_delegation_unlock;
1488 if (delegation == NULL)
1489 delegation = &deleg_cur->stateid;
1490 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1491 goto no_delegation_unlock;
1493 nfs_mark_delegation_referenced(deleg_cur);
1494 __update_open_stateid(state, open_stateid, &deleg_cur->stateid,
1497 no_delegation_unlock:
1498 spin_unlock(&deleg_cur->lock);
1502 if (!ret && open_stateid != NULL) {
1503 __update_open_stateid(state, open_stateid, NULL, fmode, &freeme);
1506 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1507 nfs4_schedule_state_manager(clp);
1508 if (freeme.type != 0)
1509 nfs4_test_and_free_stateid(server, &freeme,
1510 state->owner->so_cred);
1515 static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1516 const nfs4_stateid *stateid)
1518 struct nfs4_state *state = lsp->ls_state;
1521 spin_lock(&state->state_lock);
1522 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1524 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1526 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1529 spin_unlock(&state->state_lock);
1533 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1535 struct nfs_delegation *delegation;
1538 delegation = rcu_dereference(NFS_I(inode)->delegation);
1539 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1544 nfs4_inode_return_delegation(inode);
1547 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1549 struct nfs4_state *state = opendata->state;
1550 struct nfs_inode *nfsi = NFS_I(state->inode);
1551 struct nfs_delegation *delegation;
1552 int open_mode = opendata->o_arg.open_flags;
1553 fmode_t fmode = opendata->o_arg.fmode;
1554 enum open_claim_type4 claim = opendata->o_arg.claim;
1555 nfs4_stateid stateid;
1559 spin_lock(&state->owner->so_lock);
1560 if (can_open_cached(state, fmode, open_mode)) {
1561 update_open_stateflags(state, fmode);
1562 spin_unlock(&state->owner->so_lock);
1563 goto out_return_state;
1565 spin_unlock(&state->owner->so_lock);
1567 delegation = rcu_dereference(nfsi->delegation);
1568 if (!can_open_delegated(delegation, fmode, claim)) {
1572 /* Save the delegation */
1573 nfs4_stateid_copy(&stateid, &delegation->stateid);
1575 nfs_release_seqid(opendata->o_arg.seqid);
1576 if (!opendata->is_recover) {
1577 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1583 /* Try to update the stateid using the delegation */
1584 if (update_open_stateid(state, NULL, &stateid, fmode))
1585 goto out_return_state;
1588 return ERR_PTR(ret);
1590 atomic_inc(&state->count);
1595 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1597 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1598 struct nfs_delegation *delegation;
1599 int delegation_flags = 0;
1602 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1604 delegation_flags = delegation->flags;
1606 switch (data->o_arg.claim) {
1609 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1610 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1611 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1612 "returning a delegation for "
1613 "OPEN(CLAIM_DELEGATE_CUR)\n",
1617 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1618 nfs_inode_set_delegation(state->inode,
1619 data->owner->so_cred,
1622 nfs_inode_reclaim_delegation(state->inode,
1623 data->owner->so_cred,
1628 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1629 * and update the nfs4_state.
1631 static struct nfs4_state *
1632 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1634 struct inode *inode = data->state->inode;
1635 struct nfs4_state *state = data->state;
1638 if (!data->rpc_done) {
1639 if (data->rpc_status)
1640 return ERR_PTR(data->rpc_status);
1641 /* cached opens have already been processed */
1645 ret = nfs_refresh_inode(inode, &data->f_attr);
1647 return ERR_PTR(ret);
1649 if (data->o_res.delegation_type != 0)
1650 nfs4_opendata_check_deleg(data, state);
1652 update_open_stateid(state, &data->o_res.stateid, NULL,
1654 atomic_inc(&state->count);
1659 static struct nfs4_state *
1660 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1662 struct inode *inode;
1663 struct nfs4_state *state = NULL;
1666 if (!data->rpc_done) {
1667 state = nfs4_try_open_cached(data);
1668 trace_nfs4_cached_open(data->state);
1673 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1675 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1676 ret = PTR_ERR(inode);
1680 state = nfs4_get_open_state(inode, data->owner);
1683 if (data->o_res.delegation_type != 0)
1684 nfs4_opendata_check_deleg(data, state);
1685 update_open_stateid(state, &data->o_res.stateid, NULL,
1689 nfs_release_seqid(data->o_arg.seqid);
1694 return ERR_PTR(ret);
1697 static struct nfs4_state *
1698 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1700 struct nfs4_state *ret;
1702 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1703 ret =_nfs4_opendata_reclaim_to_nfs4_state(data);
1705 ret = _nfs4_opendata_to_nfs4_state(data);
1706 nfs4_sequence_free_slot(&data->o_res.seq_res);
1710 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1712 struct nfs_inode *nfsi = NFS_I(state->inode);
1713 struct nfs_open_context *ctx;
1715 spin_lock(&state->inode->i_lock);
1716 list_for_each_entry(ctx, &nfsi->open_files, list) {
1717 if (ctx->state != state)
1719 get_nfs_open_context(ctx);
1720 spin_unlock(&state->inode->i_lock);
1723 spin_unlock(&state->inode->i_lock);
1724 return ERR_PTR(-ENOENT);
1727 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1728 struct nfs4_state *state, enum open_claim_type4 claim)
1730 struct nfs4_opendata *opendata;
1732 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1733 NULL, NULL, claim, GFP_NOFS);
1734 if (opendata == NULL)
1735 return ERR_PTR(-ENOMEM);
1736 opendata->state = state;
1737 atomic_inc(&state->count);
1741 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1744 struct nfs4_state *newstate;
1747 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
1749 opendata->o_arg.open_flags = 0;
1750 opendata->o_arg.fmode = fmode;
1751 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1752 NFS_SB(opendata->dentry->d_sb),
1754 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1755 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1756 nfs4_init_opendata_res(opendata);
1757 ret = _nfs4_recover_proc_open(opendata);
1760 newstate = nfs4_opendata_to_nfs4_state(opendata);
1761 if (IS_ERR(newstate))
1762 return PTR_ERR(newstate);
1763 if (newstate != opendata->state)
1765 nfs4_close_state(newstate, fmode);
1769 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1773 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1774 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1775 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1776 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1777 /* memory barrier prior to reading state->n_* */
1778 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1779 clear_bit(NFS_OPEN_STATE, &state->flags);
1781 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1784 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1787 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1791 * We may have performed cached opens for all three recoveries.
1792 * Check if we need to update the current stateid.
1794 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1795 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1796 write_seqlock(&state->seqlock);
1797 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1798 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1799 write_sequnlock(&state->seqlock);
1806 * reclaim state on the server after a reboot.
1808 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1810 struct nfs_delegation *delegation;
1811 struct nfs4_opendata *opendata;
1812 fmode_t delegation_type = 0;
1815 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1816 NFS4_OPEN_CLAIM_PREVIOUS);
1817 if (IS_ERR(opendata))
1818 return PTR_ERR(opendata);
1820 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1821 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1822 delegation_type = delegation->type;
1824 opendata->o_arg.u.delegation_type = delegation_type;
1825 status = nfs4_open_recover(opendata, state);
1826 nfs4_opendata_put(opendata);
1830 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1832 struct nfs_server *server = NFS_SERVER(state->inode);
1833 struct nfs4_exception exception = { };
1836 err = _nfs4_do_open_reclaim(ctx, state);
1837 trace_nfs4_open_reclaim(ctx, 0, err);
1838 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1840 if (err != -NFS4ERR_DELAY)
1842 nfs4_handle_exception(server, err, &exception);
1843 } while (exception.retry);
1847 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1849 struct nfs_open_context *ctx;
1852 ctx = nfs4_state_find_open_context(state);
1855 ret = nfs4_do_open_reclaim(ctx, state);
1856 put_nfs_open_context(ctx);
1860 static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1864 printk(KERN_ERR "NFS: %s: unhandled error "
1865 "%d.\n", __func__, err);
1871 case -NFS4ERR_BADSESSION:
1872 case -NFS4ERR_BADSLOT:
1873 case -NFS4ERR_BAD_HIGH_SLOT:
1874 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1875 case -NFS4ERR_DEADSESSION:
1876 set_bit(NFS_DELEGATED_STATE, &state->flags);
1877 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1879 case -NFS4ERR_STALE_CLIENTID:
1880 case -NFS4ERR_STALE_STATEID:
1881 set_bit(NFS_DELEGATED_STATE, &state->flags);
1882 /* Don't recall a delegation if it was lost */
1883 nfs4_schedule_lease_recovery(server->nfs_client);
1885 case -NFS4ERR_MOVED:
1886 nfs4_schedule_migration_recovery(server);
1888 case -NFS4ERR_LEASE_MOVED:
1889 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1891 case -NFS4ERR_DELEG_REVOKED:
1892 case -NFS4ERR_ADMIN_REVOKED:
1893 case -NFS4ERR_EXPIRED:
1894 case -NFS4ERR_BAD_STATEID:
1895 case -NFS4ERR_OPENMODE:
1896 nfs_inode_find_state_and_recover(state->inode,
1898 nfs4_schedule_stateid_recovery(server, state);
1900 case -NFS4ERR_DELAY:
1901 case -NFS4ERR_GRACE:
1902 set_bit(NFS_DELEGATED_STATE, &state->flags);
1906 case -NFS4ERR_DENIED:
1907 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1913 int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
1914 struct nfs4_state *state, const nfs4_stateid *stateid,
1917 struct nfs_server *server = NFS_SERVER(state->inode);
1918 struct nfs4_opendata *opendata;
1921 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1922 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1923 if (IS_ERR(opendata))
1924 return PTR_ERR(opendata);
1925 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1926 write_seqlock(&state->seqlock);
1927 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1928 write_sequnlock(&state->seqlock);
1929 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1930 switch (type & (FMODE_READ|FMODE_WRITE)) {
1931 case FMODE_READ|FMODE_WRITE:
1933 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1936 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1940 err = nfs4_open_recover_helper(opendata, FMODE_READ);
1942 nfs4_opendata_put(opendata);
1943 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1946 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1948 struct nfs4_opendata *data = calldata;
1950 nfs4_setup_sequence(data->o_arg.server->nfs_client,
1951 &data->c_arg.seq_args, &data->c_res.seq_res, task);
1954 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1956 struct nfs4_opendata *data = calldata;
1958 nfs40_sequence_done(task, &data->c_res.seq_res);
1960 data->rpc_status = task->tk_status;
1961 if (data->rpc_status == 0) {
1962 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1963 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1964 renew_lease(data->o_res.server, data->timestamp);
1969 static void nfs4_open_confirm_release(void *calldata)
1971 struct nfs4_opendata *data = calldata;
1972 struct nfs4_state *state = NULL;
1974 /* If this request hasn't been cancelled, do nothing */
1975 if (data->cancelled == 0)
1977 /* In case of error, no cleanup! */
1978 if (!data->rpc_done)
1980 state = nfs4_opendata_to_nfs4_state(data);
1982 nfs4_close_state(state, data->o_arg.fmode);
1984 nfs4_opendata_put(data);
1987 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1988 .rpc_call_prepare = nfs4_open_confirm_prepare,
1989 .rpc_call_done = nfs4_open_confirm_done,
1990 .rpc_release = nfs4_open_confirm_release,
1994 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1996 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1998 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
1999 struct rpc_task *task;
2000 struct rpc_message msg = {
2001 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
2002 .rpc_argp = &data->c_arg,
2003 .rpc_resp = &data->c_res,
2004 .rpc_cred = data->owner->so_cred,
2006 struct rpc_task_setup task_setup_data = {
2007 .rpc_client = server->client,
2008 .rpc_message = &msg,
2009 .callback_ops = &nfs4_open_confirm_ops,
2010 .callback_data = data,
2011 .workqueue = nfsiod_workqueue,
2012 .flags = RPC_TASK_ASYNC,
2016 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
2017 kref_get(&data->kref);
2019 data->rpc_status = 0;
2020 data->timestamp = jiffies;
2021 if (data->is_recover)
2022 nfs4_set_sequence_privileged(&data->c_arg.seq_args);
2023 task = rpc_run_task(&task_setup_data);
2025 return PTR_ERR(task);
2026 status = rpc_wait_for_completion_task(task);
2028 data->cancelled = 1;
2031 status = data->rpc_status;
2036 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
2038 struct nfs4_opendata *data = calldata;
2039 struct nfs4_state_owner *sp = data->owner;
2040 struct nfs_client *clp = sp->so_server->nfs_client;
2041 enum open_claim_type4 claim = data->o_arg.claim;
2043 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
2046 * Check if we still need to send an OPEN call, or if we can use
2047 * a delegation instead.
2049 if (data->state != NULL) {
2050 struct nfs_delegation *delegation;
2052 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
2055 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2056 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
2057 goto unlock_no_action;
2060 /* Update client id. */
2061 data->o_arg.clientid = clp->cl_clientid;
2065 case NFS4_OPEN_CLAIM_PREVIOUS:
2066 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
2067 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2068 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
2069 case NFS4_OPEN_CLAIM_FH:
2070 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
2071 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
2073 data->timestamp = jiffies;
2074 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
2075 &data->o_arg.seq_args,
2076 &data->o_res.seq_res,
2078 nfs_release_seqid(data->o_arg.seqid);
2080 /* Set the create mode (note dependency on the session type) */
2081 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2082 if (data->o_arg.open_flags & O_EXCL) {
2083 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2084 if (nfs4_has_persistent_session(clp))
2085 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2086 else if (clp->cl_mvops->minor_version > 0)
2087 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2091 trace_nfs4_cached_open(data->state);
2094 task->tk_action = NULL;
2096 nfs4_sequence_done(task, &data->o_res.seq_res);
2099 static void nfs4_open_done(struct rpc_task *task, void *calldata)
2101 struct nfs4_opendata *data = calldata;
2103 data->rpc_status = task->tk_status;
2105 if (!nfs4_sequence_process(task, &data->o_res.seq_res))
2108 if (task->tk_status == 0) {
2109 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2110 switch (data->o_res.f_attr->mode & S_IFMT) {
2114 data->rpc_status = -ELOOP;
2117 data->rpc_status = -EISDIR;
2120 data->rpc_status = -ENOTDIR;
2123 renew_lease(data->o_res.server, data->timestamp);
2124 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2125 nfs_confirm_seqid(&data->owner->so_seqid, 0);
2130 static void nfs4_open_release(void *calldata)
2132 struct nfs4_opendata *data = calldata;
2133 struct nfs4_state *state = NULL;
2135 /* If this request hasn't been cancelled, do nothing */
2136 if (data->cancelled == 0)
2138 /* In case of error, no cleanup! */
2139 if (data->rpc_status != 0 || !data->rpc_done)
2141 /* In case we need an open_confirm, no cleanup! */
2142 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2144 state = nfs4_opendata_to_nfs4_state(data);
2146 nfs4_close_state(state, data->o_arg.fmode);
2148 nfs4_opendata_put(data);
2151 static const struct rpc_call_ops nfs4_open_ops = {
2152 .rpc_call_prepare = nfs4_open_prepare,
2153 .rpc_call_done = nfs4_open_done,
2154 .rpc_release = nfs4_open_release,
2157 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
2159 struct inode *dir = d_inode(data->dir);
2160 struct nfs_server *server = NFS_SERVER(dir);
2161 struct nfs_openargs *o_arg = &data->o_arg;
2162 struct nfs_openres *o_res = &data->o_res;
2163 struct rpc_task *task;
2164 struct rpc_message msg = {
2165 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2168 .rpc_cred = data->owner->so_cred,
2170 struct rpc_task_setup task_setup_data = {
2171 .rpc_client = server->client,
2172 .rpc_message = &msg,
2173 .callback_ops = &nfs4_open_ops,
2174 .callback_data = data,
2175 .workqueue = nfsiod_workqueue,
2176 .flags = RPC_TASK_ASYNC,
2180 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
2181 kref_get(&data->kref);
2183 data->rpc_status = 0;
2184 data->cancelled = 0;
2185 data->is_recover = 0;
2187 nfs4_set_sequence_privileged(&o_arg->seq_args);
2188 data->is_recover = 1;
2190 task = rpc_run_task(&task_setup_data);
2192 return PTR_ERR(task);
2193 status = rpc_wait_for_completion_task(task);
2195 data->cancelled = 1;
2198 status = data->rpc_status;
2204 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2206 struct inode *dir = d_inode(data->dir);
2207 struct nfs_openres *o_res = &data->o_res;
2210 status = nfs4_run_open_task(data, 1);
2211 if (status != 0 || !data->rpc_done)
2214 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2216 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM)
2217 status = _nfs4_proc_open_confirm(data);
2223 * Additional permission checks in order to distinguish between an
2224 * open for read, and an open for execute. This works around the
2225 * fact that NFSv4 OPEN treats read and execute permissions as being
2227 * Note that in the non-execute case, we want to turn off permission
2228 * checking if we just created a new file (POSIX open() semantics).
2230 static int nfs4_opendata_access(struct rpc_cred *cred,
2231 struct nfs4_opendata *opendata,
2232 struct nfs4_state *state, fmode_t fmode,
2235 struct nfs_access_entry cache;
2238 /* access call failed or for some reason the server doesn't
2239 * support any access modes -- defer access call until later */
2240 if (opendata->o_res.access_supported == 0)
2245 * Use openflags to check for exec, because fmode won't
2246 * always have FMODE_EXEC set when file open for exec.
2248 if (openflags & __FMODE_EXEC) {
2249 /* ONLY check for exec rights */
2251 } else if ((fmode & FMODE_READ) && !opendata->file_created)
2255 cache.jiffies = jiffies;
2256 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2257 nfs_access_add_cache(state->inode, &cache);
2259 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
2266 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2268 static int _nfs4_proc_open(struct nfs4_opendata *data)
2270 struct inode *dir = d_inode(data->dir);
2271 struct nfs_server *server = NFS_SERVER(dir);
2272 struct nfs_openargs *o_arg = &data->o_arg;
2273 struct nfs_openres *o_res = &data->o_res;
2276 status = nfs4_run_open_task(data, 0);
2277 if (!data->rpc_done)
2280 if (status == -NFS4ERR_BADNAME &&
2281 !(o_arg->open_flags & O_CREAT))
2286 nfs_fattr_map_and_free_names(server, &data->f_attr);
2288 if (o_arg->open_flags & O_CREAT) {
2289 if (o_arg->open_flags & O_EXCL)
2290 data->file_created = 1;
2291 else if (o_res->cinfo.before != o_res->cinfo.after)
2292 data->file_created = 1;
2293 if (data->file_created || dir->i_version != o_res->cinfo.after)
2294 update_changeattr(dir, &o_res->cinfo,
2295 o_res->f_attr->time_start);
2297 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2298 server->caps &= ~NFS_CAP_POSIX_LOCK;
2299 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2300 status = _nfs4_proc_open_confirm(data);
2304 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) {
2305 nfs4_sequence_free_slot(&o_res->seq_res);
2306 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
2313 * reclaim state on the server after a network partition.
2314 * Assumes caller holds the appropriate lock
2316 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2318 struct nfs4_opendata *opendata;
2321 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2322 NFS4_OPEN_CLAIM_FH);
2323 if (IS_ERR(opendata))
2324 return PTR_ERR(opendata);
2325 ret = nfs4_open_recover(opendata, state);
2327 d_drop(ctx->dentry);
2328 nfs4_opendata_put(opendata);
2332 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2334 struct nfs_server *server = NFS_SERVER(state->inode);
2335 struct nfs4_exception exception = { };
2339 err = _nfs4_open_expired(ctx, state);
2340 trace_nfs4_open_expired(ctx, 0, err);
2341 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2346 case -NFS4ERR_GRACE:
2347 case -NFS4ERR_DELAY:
2348 nfs4_handle_exception(server, err, &exception);
2351 } while (exception.retry);
2356 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2358 struct nfs_open_context *ctx;
2361 ctx = nfs4_state_find_open_context(state);
2364 ret = nfs4_do_open_expired(ctx, state);
2365 put_nfs_open_context(ctx);
2369 static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state,
2370 const nfs4_stateid *stateid)
2372 nfs_remove_bad_delegation(state->inode, stateid);
2373 write_seqlock(&state->seqlock);
2374 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2375 write_sequnlock(&state->seqlock);
2376 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2379 static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2381 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2382 nfs_finish_clear_delegation_stateid(state, NULL);
2385 static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2387 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2388 nfs40_clear_delegation_stateid(state);
2389 return nfs4_open_expired(sp, state);
2392 static int nfs40_test_and_free_expired_stateid(struct nfs_server *server,
2393 nfs4_stateid *stateid,
2394 struct rpc_cred *cred)
2396 return -NFS4ERR_BAD_STATEID;
2399 #if defined(CONFIG_NFS_V4_1)
2400 static int nfs41_test_and_free_expired_stateid(struct nfs_server *server,
2401 nfs4_stateid *stateid,
2402 struct rpc_cred *cred)
2406 switch (stateid->type) {
2409 case NFS4_INVALID_STATEID_TYPE:
2410 case NFS4_SPECIAL_STATEID_TYPE:
2411 return -NFS4ERR_BAD_STATEID;
2412 case NFS4_REVOKED_STATEID_TYPE:
2416 status = nfs41_test_stateid(server, stateid, cred);
2418 case -NFS4ERR_EXPIRED:
2419 case -NFS4ERR_ADMIN_REVOKED:
2420 case -NFS4ERR_DELEG_REVOKED:
2426 /* Ack the revoked state to the server */
2427 nfs41_free_stateid(server, stateid, cred, true);
2428 return -NFS4ERR_EXPIRED;
2431 static void nfs41_check_delegation_stateid(struct nfs4_state *state)
2433 struct nfs_server *server = NFS_SERVER(state->inode);
2434 nfs4_stateid stateid;
2435 struct nfs_delegation *delegation;
2436 struct rpc_cred *cred;
2439 /* Get the delegation credential for use by test/free_stateid */
2441 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2442 if (delegation == NULL) {
2447 nfs4_stateid_copy(&stateid, &delegation->stateid);
2448 if (test_bit(NFS_DELEGATION_REVOKED, &delegation->flags) ||
2449 !test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED,
2450 &delegation->flags)) {
2452 nfs_finish_clear_delegation_stateid(state, &stateid);
2456 cred = get_rpccred(delegation->cred);
2458 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred);
2459 trace_nfs4_test_delegation_stateid(state, NULL, status);
2460 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID)
2461 nfs_finish_clear_delegation_stateid(state, &stateid);
2467 * nfs41_check_expired_locks - possibly free a lock stateid
2469 * @state: NFSv4 state for an inode
2471 * Returns NFS_OK if recovery for this stateid is now finished.
2472 * Otherwise a negative NFS4ERR value is returned.
2474 static int nfs41_check_expired_locks(struct nfs4_state *state)
2476 int status, ret = NFS_OK;
2477 struct nfs4_lock_state *lsp, *prev = NULL;
2478 struct nfs_server *server = NFS_SERVER(state->inode);
2480 if (!test_bit(LK_STATE_IN_USE, &state->flags))
2483 spin_lock(&state->state_lock);
2484 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
2485 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
2486 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
2488 atomic_inc(&lsp->ls_count);
2489 spin_unlock(&state->state_lock);
2491 nfs4_put_lock_state(prev);
2494 status = nfs41_test_and_free_expired_stateid(server,
2497 trace_nfs4_test_lock_stateid(state, lsp, status);
2498 if (status == -NFS4ERR_EXPIRED ||
2499 status == -NFS4ERR_BAD_STATEID) {
2500 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
2501 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE;
2502 if (!recover_lost_locks)
2503 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2504 } else if (status != NFS_OK) {
2506 nfs4_put_lock_state(prev);
2509 spin_lock(&state->state_lock);
2512 spin_unlock(&state->state_lock);
2513 nfs4_put_lock_state(prev);
2519 * nfs41_check_open_stateid - possibly free an open stateid
2521 * @state: NFSv4 state for an inode
2523 * Returns NFS_OK if recovery for this stateid is now finished.
2524 * Otherwise a negative NFS4ERR value is returned.
2526 static int nfs41_check_open_stateid(struct nfs4_state *state)
2528 struct nfs_server *server = NFS_SERVER(state->inode);
2529 nfs4_stateid *stateid = &state->open_stateid;
2530 struct rpc_cred *cred = state->owner->so_cred;
2533 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) {
2534 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) {
2535 if (nfs4_have_delegation(state->inode, state->state))
2537 return -NFS4ERR_OPENMODE;
2539 return -NFS4ERR_BAD_STATEID;
2541 status = nfs41_test_and_free_expired_stateid(server, stateid, cred);
2542 trace_nfs4_test_open_stateid(state, NULL, status);
2543 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) {
2544 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2545 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2546 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2547 clear_bit(NFS_OPEN_STATE, &state->flags);
2548 stateid->type = NFS4_INVALID_STATEID_TYPE;
2550 if (status != NFS_OK)
2552 if (nfs_open_stateid_recover_openmode(state))
2553 return -NFS4ERR_OPENMODE;
2557 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2561 nfs41_check_delegation_stateid(state);
2562 status = nfs41_check_expired_locks(state);
2563 if (status != NFS_OK)
2565 status = nfs41_check_open_stateid(state);
2566 if (status != NFS_OK)
2567 status = nfs4_open_expired(sp, state);
2573 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2574 * fields corresponding to attributes that were used to store the verifier.
2575 * Make sure we clobber those fields in the later setattr call
2577 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2578 struct iattr *sattr, struct nfs4_label **label)
2580 const u32 *attrset = opendata->o_res.attrset;
2582 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2583 !(sattr->ia_valid & ATTR_ATIME_SET))
2584 sattr->ia_valid |= ATTR_ATIME;
2586 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2587 !(sattr->ia_valid & ATTR_MTIME_SET))
2588 sattr->ia_valid |= ATTR_MTIME;
2590 /* Except MODE, it seems harmless of setting twice. */
2591 if (opendata->o_arg.createmode != NFS4_CREATE_EXCLUSIVE &&
2592 attrset[1] & FATTR4_WORD1_MODE)
2593 sattr->ia_valid &= ~ATTR_MODE;
2595 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2599 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2602 struct nfs_open_context *ctx)
2604 struct nfs4_state_owner *sp = opendata->owner;
2605 struct nfs_server *server = sp->so_server;
2606 struct dentry *dentry;
2607 struct nfs4_state *state;
2611 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2613 ret = _nfs4_proc_open(opendata);
2617 state = nfs4_opendata_to_nfs4_state(opendata);
2618 ret = PTR_ERR(state);
2622 if (server->caps & NFS_CAP_POSIX_LOCK)
2623 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2624 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK)
2625 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags);
2627 dentry = opendata->dentry;
2628 if (d_really_is_negative(dentry)) {
2629 struct dentry *alias;
2631 alias = d_exact_alias(dentry, state->inode);
2633 alias = d_splice_alias(igrab(state->inode), dentry);
2634 /* d_splice_alias() can't fail here - it's a non-directory */
2637 ctx->dentry = dentry = alias;
2639 nfs_set_verifier(dentry,
2640 nfs_save_change_attribute(d_inode(opendata->dir)));
2643 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2647 if (d_inode(dentry) == state->inode) {
2648 nfs_inode_attach_open_context(ctx);
2649 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2650 nfs4_schedule_stateid_recovery(server, state);
2657 * Returns a referenced nfs4_state
2659 static int _nfs4_do_open(struct inode *dir,
2660 struct nfs_open_context *ctx,
2662 struct iattr *sattr,
2663 struct nfs4_label *label,
2666 struct nfs4_state_owner *sp;
2667 struct nfs4_state *state = NULL;
2668 struct nfs_server *server = NFS_SERVER(dir);
2669 struct nfs4_opendata *opendata;
2670 struct dentry *dentry = ctx->dentry;
2671 struct rpc_cred *cred = ctx->cred;
2672 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2673 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
2674 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
2675 struct nfs4_label *olabel = NULL;
2678 /* Protect against reboot recovery conflicts */
2680 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2682 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2685 status = nfs4_client_recover_expired_lease(server->nfs_client);
2687 goto err_put_state_owner;
2688 if (d_really_is_positive(dentry))
2689 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
2691 if (d_really_is_positive(dentry))
2692 claim = NFS4_OPEN_CLAIM_FH;
2693 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
2694 label, claim, GFP_KERNEL);
2695 if (opendata == NULL)
2696 goto err_put_state_owner;
2699 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2700 if (IS_ERR(olabel)) {
2701 status = PTR_ERR(olabel);
2702 goto err_opendata_put;
2706 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2707 if (!opendata->f_attr.mdsthreshold) {
2708 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2709 if (!opendata->f_attr.mdsthreshold)
2710 goto err_free_label;
2712 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
2714 if (d_really_is_positive(dentry))
2715 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
2717 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
2719 goto err_free_label;
2722 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
2723 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
2724 nfs4_exclusive_attrset(opendata, sattr, &label);
2726 * send create attributes which was not set by open
2727 * with an extra setattr.
2729 if (sattr->ia_valid & NFS4_VALID_ATTRS) {
2730 nfs_fattr_init(opendata->o_res.f_attr);
2731 status = nfs4_do_setattr(state->inode, cred,
2732 opendata->o_res.f_attr, sattr,
2733 ctx, label, olabel);
2735 nfs_setattr_update_inode(state->inode, sattr,
2736 opendata->o_res.f_attr);
2737 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2741 if (opened && opendata->file_created)
2742 *opened |= FILE_CREATED;
2744 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
2745 *ctx_th = opendata->f_attr.mdsthreshold;
2746 opendata->f_attr.mdsthreshold = NULL;
2749 nfs4_label_free(olabel);
2751 nfs4_opendata_put(opendata);
2752 nfs4_put_state_owner(sp);
2755 nfs4_label_free(olabel);
2757 nfs4_opendata_put(opendata);
2758 err_put_state_owner:
2759 nfs4_put_state_owner(sp);
2765 static struct nfs4_state *nfs4_do_open(struct inode *dir,
2766 struct nfs_open_context *ctx,
2768 struct iattr *sattr,
2769 struct nfs4_label *label,
2772 struct nfs_server *server = NFS_SERVER(dir);
2773 struct nfs4_exception exception = { };
2774 struct nfs4_state *res;
2778 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
2780 trace_nfs4_open_file(ctx, flags, status);
2783 /* NOTE: BAD_SEQID means the server and client disagree about the
2784 * book-keeping w.r.t. state-changing operations
2785 * (OPEN/CLOSE/LOCK/LOCKU...)
2786 * It is actually a sign of a bug on the client or on the server.
2788 * If we receive a BAD_SEQID error in the particular case of
2789 * doing an OPEN, we assume that nfs_increment_open_seqid() will
2790 * have unhashed the old state_owner for us, and that we can
2791 * therefore safely retry using a new one. We should still warn
2792 * the user though...
2794 if (status == -NFS4ERR_BAD_SEQID) {
2795 pr_warn_ratelimited("NFS: v4 server %s "
2796 " returned a bad sequence-id error!\n",
2797 NFS_SERVER(dir)->nfs_client->cl_hostname);
2798 exception.retry = 1;
2802 * BAD_STATEID on OPEN means that the server cancelled our
2803 * state before it received the OPEN_CONFIRM.
2804 * Recover by retrying the request as per the discussion
2805 * on Page 181 of RFC3530.
2807 if (status == -NFS4ERR_BAD_STATEID) {
2808 exception.retry = 1;
2811 if (status == -EAGAIN) {
2812 /* We must have found a delegation */
2813 exception.retry = 1;
2816 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2818 res = ERR_PTR(nfs4_handle_exception(server,
2819 status, &exception));
2820 } while (exception.retry);
2824 static int _nfs4_do_setattr(struct inode *inode,
2825 struct nfs_setattrargs *arg,
2826 struct nfs_setattrres *res,
2827 struct rpc_cred *cred,
2828 struct nfs_open_context *ctx)
2830 struct nfs_server *server = NFS_SERVER(inode);
2831 struct rpc_message msg = {
2832 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2837 struct rpc_cred *delegation_cred = NULL;
2838 unsigned long timestamp = jiffies;
2843 nfs_fattr_init(res->fattr);
2845 /* Servers should only apply open mode checks for file size changes */
2846 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false;
2847 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2849 if (nfs4_copy_delegation_stateid(inode, fmode, &arg->stateid, &delegation_cred)) {
2850 /* Use that stateid */
2851 } else if (truncate && ctx != NULL) {
2852 struct nfs_lock_context *l_ctx;
2853 if (!nfs4_valid_open_stateid(ctx->state))
2855 l_ctx = nfs_get_lock_context(ctx);
2857 return PTR_ERR(l_ctx);
2858 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx,
2859 &arg->stateid, &delegation_cred);
2860 nfs_put_lock_context(l_ctx);
2864 nfs4_stateid_copy(&arg->stateid, &zero_stateid);
2865 if (delegation_cred)
2866 msg.rpc_cred = delegation_cred;
2868 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1);
2870 put_rpccred(delegation_cred);
2871 if (status == 0 && ctx != NULL)
2872 renew_lease(server, timestamp);
2873 trace_nfs4_setattr(inode, &arg->stateid, status);
2877 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2878 struct nfs_fattr *fattr, struct iattr *sattr,
2879 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
2880 struct nfs4_label *olabel)
2882 struct nfs_server *server = NFS_SERVER(inode);
2883 struct nfs4_state *state = ctx ? ctx->state : NULL;
2884 struct nfs_setattrargs arg = {
2885 .fh = NFS_FH(inode),
2888 .bitmask = server->attr_bitmask,
2891 struct nfs_setattrres res = {
2896 struct nfs4_exception exception = {
2899 .stateid = &arg.stateid,
2903 arg.bitmask = nfs4_bitmask(server, ilabel);
2905 arg.bitmask = nfs4_bitmask(server, olabel);
2908 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx);
2910 case -NFS4ERR_OPENMODE:
2911 if (!(sattr->ia_valid & ATTR_SIZE)) {
2912 pr_warn_once("NFSv4: server %s is incorrectly "
2913 "applying open mode checks to "
2914 "a SETATTR that is not "
2915 "changing file size.\n",
2916 server->nfs_client->cl_hostname);
2918 if (state && !(state->state & FMODE_WRITE)) {
2920 if (sattr->ia_valid & ATTR_OPEN)
2925 err = nfs4_handle_exception(server, err, &exception);
2926 } while (exception.retry);
2932 nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
2934 if (inode == NULL || !nfs_have_layout(inode))
2937 return pnfs_wait_on_layoutreturn(inode, task);
2940 struct nfs4_closedata {
2941 struct inode *inode;
2942 struct nfs4_state *state;
2943 struct nfs_closeargs arg;
2944 struct nfs_closeres res;
2946 struct nfs4_layoutreturn_args arg;
2947 struct nfs4_layoutreturn_res res;
2948 struct nfs4_xdr_opaque_data ld_private;
2952 struct nfs_fattr fattr;
2953 unsigned long timestamp;
2956 static void nfs4_free_closedata(void *data)
2958 struct nfs4_closedata *calldata = data;
2959 struct nfs4_state_owner *sp = calldata->state->owner;
2960 struct super_block *sb = calldata->state->inode->i_sb;
2962 if (calldata->lr.roc)
2963 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res,
2964 calldata->res.lr_ret);
2965 nfs4_put_open_state(calldata->state);
2966 nfs_free_seqid(calldata->arg.seqid);
2967 nfs4_put_state_owner(sp);
2968 nfs_sb_deactive(sb);
2972 static void nfs4_close_done(struct rpc_task *task, void *data)
2974 struct nfs4_closedata *calldata = data;
2975 struct nfs4_state *state = calldata->state;
2976 struct nfs_server *server = NFS_SERVER(calldata->inode);
2977 nfs4_stateid *res_stateid = NULL;
2979 dprintk("%s: begin!\n", __func__);
2980 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2982 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
2984 /* Handle Layoutreturn errors */
2985 if (calldata->arg.lr_args && task->tk_status != 0) {
2986 switch (calldata->res.lr_ret) {
2988 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
2991 calldata->arg.lr_args = NULL;
2992 calldata->res.lr_res = NULL;
2994 case -NFS4ERR_ADMIN_REVOKED:
2995 case -NFS4ERR_DELEG_REVOKED:
2996 case -NFS4ERR_EXPIRED:
2997 case -NFS4ERR_BAD_STATEID:
2998 case -NFS4ERR_OLD_STATEID:
2999 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
3000 case -NFS4ERR_WRONG_CRED:
3001 calldata->arg.lr_args = NULL;
3002 calldata->res.lr_res = NULL;
3003 calldata->res.lr_ret = 0;
3004 rpc_restart_call_prepare(task);
3009 /* hmm. we are done with the inode, and in the process of freeing
3010 * the state_owner. we keep this around to process errors
3012 switch (task->tk_status) {
3014 res_stateid = &calldata->res.stateid;
3015 renew_lease(server, calldata->timestamp);
3017 case -NFS4ERR_ACCESS:
3018 if (calldata->arg.bitmask != NULL) {
3019 calldata->arg.bitmask = NULL;
3020 calldata->res.fattr = NULL;
3021 task->tk_status = 0;
3022 rpc_restart_call_prepare(task);
3027 case -NFS4ERR_ADMIN_REVOKED:
3028 case -NFS4ERR_STALE_STATEID:
3029 case -NFS4ERR_EXPIRED:
3030 nfs4_free_revoked_stateid(server,
3031 &calldata->arg.stateid,
3032 task->tk_msg.rpc_cred);
3033 case -NFS4ERR_OLD_STATEID:
3034 case -NFS4ERR_BAD_STATEID:
3035 if (!nfs4_stateid_match(&calldata->arg.stateid,
3036 &state->open_stateid)) {
3037 rpc_restart_call_prepare(task);
3040 if (calldata->arg.fmode == 0)
3043 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
3044 rpc_restart_call_prepare(task);
3048 nfs_clear_open_stateid(state, &calldata->arg.stateid,
3049 res_stateid, calldata->arg.fmode);
3051 nfs_release_seqid(calldata->arg.seqid);
3052 nfs_refresh_inode(calldata->inode, &calldata->fattr);
3053 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
3056 static void nfs4_close_prepare(struct rpc_task *task, void *data)
3058 struct nfs4_closedata *calldata = data;
3059 struct nfs4_state *state = calldata->state;
3060 struct inode *inode = calldata->inode;
3061 bool is_rdonly, is_wronly, is_rdwr;
3064 dprintk("%s: begin!\n", __func__);
3065 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3068 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
3069 spin_lock(&state->owner->so_lock);
3070 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
3071 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
3072 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
3073 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
3074 /* Calculate the change in open mode */
3075 calldata->arg.fmode = 0;
3076 if (state->n_rdwr == 0) {
3077 if (state->n_rdonly == 0)
3078 call_close |= is_rdonly;
3080 calldata->arg.fmode |= FMODE_READ;
3081 if (state->n_wronly == 0)
3082 call_close |= is_wronly;
3084 calldata->arg.fmode |= FMODE_WRITE;
3085 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
3086 call_close |= is_rdwr;
3088 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
3090 if (!nfs4_valid_open_stateid(state) ||
3091 test_bit(NFS_OPEN_STATE, &state->flags) == 0)
3093 spin_unlock(&state->owner->so_lock);
3096 /* Note: exit _without_ calling nfs4_close_done */
3100 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) {
3101 nfs_release_seqid(calldata->arg.seqid);
3105 if (calldata->arg.fmode == 0)
3106 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3108 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) {
3109 /* Close-to-open cache consistency revalidation */
3110 if (!nfs4_have_delegation(inode, FMODE_READ))
3111 calldata->arg.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask;
3113 calldata->arg.bitmask = NULL;
3116 calldata->arg.share_access =
3117 nfs4_map_atomic_open_share(NFS_SERVER(inode),
3118 calldata->arg.fmode, 0);
3120 if (calldata->res.fattr == NULL)
3121 calldata->arg.bitmask = NULL;
3122 else if (calldata->arg.bitmask == NULL)
3123 calldata->res.fattr = NULL;
3124 calldata->timestamp = jiffies;
3125 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client,
3126 &calldata->arg.seq_args,
3127 &calldata->res.seq_res,
3129 nfs_release_seqid(calldata->arg.seqid);
3130 dprintk("%s: done!\n", __func__);
3133 task->tk_action = NULL;
3135 nfs4_sequence_done(task, &calldata->res.seq_res);
3138 static const struct rpc_call_ops nfs4_close_ops = {
3139 .rpc_call_prepare = nfs4_close_prepare,
3140 .rpc_call_done = nfs4_close_done,
3141 .rpc_release = nfs4_free_closedata,
3145 * It is possible for data to be read/written from a mem-mapped file
3146 * after the sys_close call (which hits the vfs layer as a flush).
3147 * This means that we can't safely call nfsv4 close on a file until
3148 * the inode is cleared. This in turn means that we are not good
3149 * NFSv4 citizens - we do not indicate to the server to update the file's
3150 * share state even when we are done with one of the three share
3151 * stateid's in the inode.
3153 * NOTE: Caller must be holding the sp->so_owner semaphore!
3155 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
3157 struct nfs_server *server = NFS_SERVER(state->inode);
3158 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
3159 struct nfs4_closedata *calldata;
3160 struct nfs4_state_owner *sp = state->owner;
3161 struct rpc_task *task;
3162 struct rpc_message msg = {
3163 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
3164 .rpc_cred = state->owner->so_cred,
3166 struct rpc_task_setup task_setup_data = {
3167 .rpc_client = server->client,
3168 .rpc_message = &msg,
3169 .callback_ops = &nfs4_close_ops,
3170 .workqueue = nfsiod_workqueue,
3171 .flags = RPC_TASK_ASYNC,
3173 int status = -ENOMEM;
3175 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
3176 &task_setup_data.rpc_client, &msg);
3178 calldata = kzalloc(sizeof(*calldata), gfp_mask);
3179 if (calldata == NULL)
3181 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
3182 calldata->inode = state->inode;
3183 calldata->state = state;
3184 calldata->arg.fh = NFS_FH(state->inode);
3185 /* Serialization for the sequence id */
3186 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
3187 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
3188 if (IS_ERR(calldata->arg.seqid))
3189 goto out_free_calldata;
3190 nfs_fattr_init(&calldata->fattr);
3191 calldata->arg.fmode = 0;
3192 calldata->lr.arg.ld_private = &calldata->lr.ld_private;
3193 calldata->res.fattr = &calldata->fattr;
3194 calldata->res.seqid = calldata->arg.seqid;
3195 calldata->res.server = server;
3196 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
3197 calldata->lr.roc = pnfs_roc(state->inode,
3198 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred);
3199 if (calldata->lr.roc) {
3200 calldata->arg.lr_args = &calldata->lr.arg;
3201 calldata->res.lr_res = &calldata->lr.res;
3203 nfs_sb_active(calldata->inode->i_sb);
3205 msg.rpc_argp = &calldata->arg;
3206 msg.rpc_resp = &calldata->res;
3207 task_setup_data.callback_data = calldata;
3208 task = rpc_run_task(&task_setup_data);
3210 return PTR_ERR(task);
3213 status = rpc_wait_for_completion_task(task);
3219 nfs4_put_open_state(state);
3220 nfs4_put_state_owner(sp);
3224 static struct inode *
3225 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3226 int open_flags, struct iattr *attr, int *opened)
3228 struct nfs4_state *state;
3229 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
3231 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
3233 /* Protect against concurrent sillydeletes */
3234 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
3236 nfs4_label_release_security(label);
3239 return ERR_CAST(state);
3240 return state->inode;
3243 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
3245 if (ctx->state == NULL)
3248 nfs4_close_sync(ctx->state, ctx->mode);
3250 nfs4_close_state(ctx->state, ctx->mode);
3253 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3254 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
3255 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_MODE_UMASK - 1UL)
3257 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3259 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
3260 struct nfs4_server_caps_arg args = {
3264 struct nfs4_server_caps_res res = {};
3265 struct rpc_message msg = {
3266 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
3273 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3274 FATTR4_WORD0_FH_EXPIRE_TYPE |
3275 FATTR4_WORD0_LINK_SUPPORT |
3276 FATTR4_WORD0_SYMLINK_SUPPORT |
3277 FATTR4_WORD0_ACLSUPPORT;
3279 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3281 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3283 /* Sanity check the server answers */
3284 switch (minorversion) {
3286 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3287 res.attr_bitmask[2] = 0;
3290 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3293 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3295 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
3296 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3297 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3298 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3299 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
3300 NFS_CAP_CTIME|NFS_CAP_MTIME|
3301 NFS_CAP_SECURITY_LABEL);
3302 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3303 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3304 server->caps |= NFS_CAP_ACLS;
3305 if (res.has_links != 0)
3306 server->caps |= NFS_CAP_HARDLINKS;
3307 if (res.has_symlinks != 0)
3308 server->caps |= NFS_CAP_SYMLINKS;
3309 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3310 server->caps |= NFS_CAP_FILEID;
3311 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3312 server->caps |= NFS_CAP_MODE;
3313 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3314 server->caps |= NFS_CAP_NLINK;
3315 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3316 server->caps |= NFS_CAP_OWNER;
3317 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3318 server->caps |= NFS_CAP_OWNER_GROUP;
3319 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3320 server->caps |= NFS_CAP_ATIME;
3321 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3322 server->caps |= NFS_CAP_CTIME;
3323 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3324 server->caps |= NFS_CAP_MTIME;
3325 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
3326 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3327 server->caps |= NFS_CAP_SECURITY_LABEL;
3329 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3330 sizeof(server->attr_bitmask));
3331 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
3333 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3334 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3335 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
3336 server->cache_consistency_bitmask[2] = 0;
3338 /* Avoid a regression due to buggy server */
3339 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++)
3340 res.exclcreat_bitmask[i] &= res.attr_bitmask[i];
3341 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3342 sizeof(server->exclcreat_bitmask));
3344 server->acl_bitmask = res.acl_bitmask;
3345 server->fh_expire_type = res.fh_expire_type;
3351 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3353 struct nfs4_exception exception = { };
3356 err = nfs4_handle_exception(server,
3357 _nfs4_server_capabilities(server, fhandle),
3359 } while (exception.retry);
3363 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3364 struct nfs_fsinfo *info)
3367 struct nfs4_lookup_root_arg args = {
3370 struct nfs4_lookup_res res = {
3372 .fattr = info->fattr,
3375 struct rpc_message msg = {
3376 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3381 bitmask[0] = nfs4_fattr_bitmap[0];
3382 bitmask[1] = nfs4_fattr_bitmap[1];
3384 * Process the label in the upcoming getfattr
3386 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3388 nfs_fattr_init(info->fattr);
3389 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3392 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3393 struct nfs_fsinfo *info)
3395 struct nfs4_exception exception = { };
3398 err = _nfs4_lookup_root(server, fhandle, info);
3399 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
3402 case -NFS4ERR_WRONGSEC:
3405 err = nfs4_handle_exception(server, err, &exception);
3407 } while (exception.retry);
3412 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3413 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3415 struct rpc_auth_create_args auth_args = {
3416 .pseudoflavor = flavor,
3418 struct rpc_auth *auth;
3420 auth = rpcauth_create(&auth_args, server->client);
3423 return nfs4_lookup_root(server, fhandle, info);
3427 * Retry pseudoroot lookup with various security flavors. We do this when:
3429 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3430 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3432 * Returns zero on success, or a negative NFS4ERR value, or a
3433 * negative errno value.
3435 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3436 struct nfs_fsinfo *info)
3438 /* Per 3530bis 15.33.5 */
3439 static const rpc_authflavor_t flav_array[] = {
3443 RPC_AUTH_UNIX, /* courtesy */
3446 int status = -EPERM;
3449 if (server->auth_info.flavor_len > 0) {
3450 /* try each flavor specified by user */
3451 for (i = 0; i < server->auth_info.flavor_len; i++) {
3452 status = nfs4_lookup_root_sec(server, fhandle, info,
3453 server->auth_info.flavors[i]);
3454 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3459 /* no flavors specified by user, try default list */
3460 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3461 status = nfs4_lookup_root_sec(server, fhandle, info,
3463 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3470 * -EACCESS could mean that the user doesn't have correct permissions
3471 * to access the mount. It could also mean that we tried to mount
3472 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3473 * existing mount programs don't handle -EACCES very well so it should
3474 * be mapped to -EPERM instead.
3476 if (status == -EACCES)
3482 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3483 * @server: initialized nfs_server handle
3484 * @fhandle: we fill in the pseudo-fs root file handle
3485 * @info: we fill in an FSINFO struct
3486 * @auth_probe: probe the auth flavours
3488 * Returns zero on success, or a negative errno.
3490 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
3491 struct nfs_fsinfo *info,
3497 status = nfs4_lookup_root(server, fhandle, info);
3499 if (auth_probe || status == NFS4ERR_WRONGSEC)
3500 status = server->nfs_client->cl_mvops->find_root_sec(server,
3504 status = nfs4_server_capabilities(server, fhandle);
3506 status = nfs4_do_fsinfo(server, fhandle, info);
3508 return nfs4_map_errors(status);
3511 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3512 struct nfs_fsinfo *info)
3515 struct nfs_fattr *fattr = info->fattr;
3516 struct nfs4_label *label = NULL;
3518 error = nfs4_server_capabilities(server, mntfh);
3520 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3524 label = nfs4_label_alloc(server, GFP_KERNEL);
3526 return PTR_ERR(label);
3528 error = nfs4_proc_getattr(server, mntfh, fattr, label);
3530 dprintk("nfs4_get_root: getattr error = %d\n", -error);
3531 goto err_free_label;
3534 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3535 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3536 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3539 nfs4_label_free(label);
3545 * Get locations and (maybe) other attributes of a referral.
3546 * Note that we'll actually follow the referral later when
3547 * we detect fsid mismatch in inode revalidation
3549 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3550 const struct qstr *name, struct nfs_fattr *fattr,
3551 struct nfs_fh *fhandle)
3553 int status = -ENOMEM;
3554 struct page *page = NULL;
3555 struct nfs4_fs_locations *locations = NULL;
3557 page = alloc_page(GFP_KERNEL);
3560 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3561 if (locations == NULL)
3564 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
3569 * If the fsid didn't change, this is a migration event, not a
3570 * referral. Cause us to drop into the exception handler, which
3571 * will kick off migration recovery.
3573 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3574 dprintk("%s: server did not return a different fsid for"
3575 " a referral at %s\n", __func__, name->name);
3576 status = -NFS4ERR_MOVED;
3579 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3580 nfs_fixup_referral_attributes(&locations->fattr);
3582 /* replace the lookup nfs_fattr with the locations nfs_fattr */
3583 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
3584 memset(fhandle, 0, sizeof(struct nfs_fh));
3592 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3593 struct nfs_fattr *fattr, struct nfs4_label *label)
3595 struct nfs4_getattr_arg args = {
3597 .bitmask = server->attr_bitmask,
3599 struct nfs4_getattr_res res = {
3604 struct rpc_message msg = {
3605 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3610 args.bitmask = nfs4_bitmask(server, label);
3612 nfs_fattr_init(fattr);
3613 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3616 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3617 struct nfs_fattr *fattr, struct nfs4_label *label)
3619 struct nfs4_exception exception = { };
3622 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3623 trace_nfs4_getattr(server, fhandle, fattr, err);
3624 err = nfs4_handle_exception(server, err,
3626 } while (exception.retry);
3631 * The file is not closed if it is opened due to the a request to change
3632 * the size of the file. The open call will not be needed once the
3633 * VFS layer lookup-intents are implemented.
3635 * Close is called when the inode is destroyed.
3636 * If we haven't opened the file for O_WRONLY, we
3637 * need to in the size_change case to obtain a stateid.
3640 * Because OPEN is always done by name in nfsv4, it is
3641 * possible that we opened a different file by the same
3642 * name. We can recognize this race condition, but we
3643 * can't do anything about it besides returning an error.
3645 * This will be fixed with VFS changes (lookup-intent).
3648 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3649 struct iattr *sattr)
3651 struct inode *inode = d_inode(dentry);
3652 struct rpc_cred *cred = NULL;
3653 struct nfs_open_context *ctx = NULL;
3654 struct nfs4_label *label = NULL;
3657 if (pnfs_ld_layoutret_on_setattr(inode) &&
3658 sattr->ia_valid & ATTR_SIZE &&
3659 sattr->ia_size < i_size_read(inode))
3660 pnfs_commit_and_return_layout(inode);
3662 nfs_fattr_init(fattr);
3664 /* Deal with open(O_TRUNC) */
3665 if (sattr->ia_valid & ATTR_OPEN)
3666 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
3668 /* Optimization: if the end result is no change, don't RPC */
3669 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
3672 /* Search for an existing open(O_WRITE) file */
3673 if (sattr->ia_valid & ATTR_FILE) {
3675 ctx = nfs_file_open_context(sattr->ia_file);
3680 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3682 return PTR_ERR(label);
3684 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL, label);
3686 nfs_setattr_update_inode(inode, sattr, fattr);
3687 nfs_setsecurity(inode, fattr, label);
3689 nfs4_label_free(label);
3693 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3694 const struct qstr *name, struct nfs_fh *fhandle,
3695 struct nfs_fattr *fattr, struct nfs4_label *label)
3697 struct nfs_server *server = NFS_SERVER(dir);
3699 struct nfs4_lookup_arg args = {
3700 .bitmask = server->attr_bitmask,
3701 .dir_fh = NFS_FH(dir),
3704 struct nfs4_lookup_res res = {
3710 struct rpc_message msg = {
3711 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3716 args.bitmask = nfs4_bitmask(server, label);
3718 nfs_fattr_init(fattr);
3720 dprintk("NFS call lookup %s\n", name->name);
3721 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
3722 dprintk("NFS reply lookup: %d\n", status);
3726 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
3728 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
3729 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
3730 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3734 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3735 const struct qstr *name, struct nfs_fh *fhandle,
3736 struct nfs_fattr *fattr, struct nfs4_label *label)
3738 struct nfs4_exception exception = { };
3739 struct rpc_clnt *client = *clnt;
3742 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
3743 trace_nfs4_lookup(dir, name, err);
3745 case -NFS4ERR_BADNAME:
3748 case -NFS4ERR_MOVED:
3749 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
3750 if (err == -NFS4ERR_MOVED)
3751 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3753 case -NFS4ERR_WRONGSEC:
3755 if (client != *clnt)
3757 client = nfs4_negotiate_security(client, dir, name);
3759 return PTR_ERR(client);
3761 exception.retry = 1;
3764 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3766 } while (exception.retry);
3771 else if (client != *clnt)
3772 rpc_shutdown_client(client);
3777 static int nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
3778 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3779 struct nfs4_label *label)
3782 struct rpc_clnt *client = NFS_CLIENT(dir);
3784 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
3785 if (client != NFS_CLIENT(dir)) {
3786 rpc_shutdown_client(client);
3787 nfs_fixup_secinfo_attributes(fattr);
3793 nfs4_proc_lookup_mountpoint(struct inode *dir, const struct qstr *name,
3794 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3796 struct rpc_clnt *client = NFS_CLIENT(dir);
3799 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
3801 return ERR_PTR(status);
3802 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
3805 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3807 struct nfs_server *server = NFS_SERVER(inode);
3808 struct nfs4_accessargs args = {
3809 .fh = NFS_FH(inode),
3810 .bitmask = server->cache_consistency_bitmask,
3812 struct nfs4_accessres res = {
3815 struct rpc_message msg = {
3816 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3819 .rpc_cred = entry->cred,
3821 int mode = entry->mask;
3825 * Determine which access bits we want to ask for...
3827 if (mode & MAY_READ)
3828 args.access |= NFS4_ACCESS_READ;
3829 if (S_ISDIR(inode->i_mode)) {
3830 if (mode & MAY_WRITE)
3831 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3832 if (mode & MAY_EXEC)
3833 args.access |= NFS4_ACCESS_LOOKUP;
3835 if (mode & MAY_WRITE)
3836 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3837 if (mode & MAY_EXEC)
3838 args.access |= NFS4_ACCESS_EXECUTE;
3841 res.fattr = nfs_alloc_fattr();
3842 if (res.fattr == NULL)
3845 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3847 nfs_access_set_mask(entry, res.access);
3848 nfs_refresh_inode(inode, res.fattr);
3850 nfs_free_fattr(res.fattr);
3854 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3856 struct nfs4_exception exception = { };
3859 err = _nfs4_proc_access(inode, entry);
3860 trace_nfs4_access(inode, err);
3861 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3863 } while (exception.retry);
3868 * TODO: For the time being, we don't try to get any attributes
3869 * along with any of the zero-copy operations READ, READDIR,
3872 * In the case of the first three, we want to put the GETATTR
3873 * after the read-type operation -- this is because it is hard
3874 * to predict the length of a GETATTR response in v4, and thus
3875 * align the READ data correctly. This means that the GETATTR
3876 * may end up partially falling into the page cache, and we should
3877 * shift it into the 'tail' of the xdr_buf before processing.
3878 * To do this efficiently, we need to know the total length
3879 * of data received, which doesn't seem to be available outside
3882 * In the case of WRITE, we also want to put the GETATTR after
3883 * the operation -- in this case because we want to make sure
3884 * we get the post-operation mtime and size.
3886 * Both of these changes to the XDR layer would in fact be quite
3887 * minor, but I decided to leave them for a subsequent patch.
3889 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3890 unsigned int pgbase, unsigned int pglen)
3892 struct nfs4_readlink args = {
3893 .fh = NFS_FH(inode),
3898 struct nfs4_readlink_res res;
3899 struct rpc_message msg = {
3900 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3905 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
3908 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3909 unsigned int pgbase, unsigned int pglen)
3911 struct nfs4_exception exception = { };
3914 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3915 trace_nfs4_readlink(inode, err);
3916 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3918 } while (exception.retry);
3923 * This is just for mknod. open(O_CREAT) will always do ->open_context().
3926 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
3929 struct nfs_server *server = NFS_SERVER(dir);
3930 struct nfs4_label l, *ilabel = NULL;
3931 struct nfs_open_context *ctx;
3932 struct nfs4_state *state;
3935 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL);
3937 return PTR_ERR(ctx);
3939 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3941 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
3942 sattr->ia_mode &= ~current_umask();
3943 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
3944 if (IS_ERR(state)) {
3945 status = PTR_ERR(state);
3949 nfs4_label_release_security(ilabel);
3950 put_nfs_open_context(ctx);
3954 static int _nfs4_proc_remove(struct inode *dir, const struct qstr *name)
3956 struct nfs_server *server = NFS_SERVER(dir);
3957 struct nfs_removeargs args = {
3961 struct nfs_removeres res = {
3964 struct rpc_message msg = {
3965 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3969 unsigned long timestamp = jiffies;
3972 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
3974 update_changeattr(dir, &res.cinfo, timestamp);
3978 static int nfs4_proc_remove(struct inode *dir, const struct qstr *name)
3980 struct nfs4_exception exception = { };
3983 err = _nfs4_proc_remove(dir, name);
3984 trace_nfs4_remove(dir, name, err);
3985 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3987 } while (exception.retry);
3991 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
3993 struct nfs_server *server = NFS_SERVER(dir);
3994 struct nfs_removeargs *args = msg->rpc_argp;
3995 struct nfs_removeres *res = msg->rpc_resp;
3997 res->server = server;
3998 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
3999 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
4001 nfs_fattr_init(res->dir_attr);
4004 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
4006 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client,
4007 &data->args.seq_args,
4012 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
4014 struct nfs_unlinkdata *data = task->tk_calldata;
4015 struct nfs_removeres *res = &data->res;
4017 if (!nfs4_sequence_done(task, &res->seq_res))
4019 if (nfs4_async_handle_error(task, res->server, NULL,
4020 &data->timeout) == -EAGAIN)
4022 if (task->tk_status == 0)
4023 update_changeattr(dir, &res->cinfo, res->dir_attr->time_start);
4027 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
4029 struct nfs_server *server = NFS_SERVER(dir);
4030 struct nfs_renameargs *arg = msg->rpc_argp;
4031 struct nfs_renameres *res = msg->rpc_resp;
4033 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
4034 res->server = server;
4035 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
4038 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
4040 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client,
4041 &data->args.seq_args,
4046 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
4047 struct inode *new_dir)
4049 struct nfs_renamedata *data = task->tk_calldata;
4050 struct nfs_renameres *res = &data->res;
4052 if (!nfs4_sequence_done(task, &res->seq_res))
4054 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
4057 if (task->tk_status == 0) {
4058 update_changeattr(old_dir, &res->old_cinfo, res->old_fattr->time_start);
4059 if (new_dir != old_dir)
4060 update_changeattr(new_dir, &res->new_cinfo, res->new_fattr->time_start);
4065 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
4067 struct nfs_server *server = NFS_SERVER(inode);
4068 struct nfs4_link_arg arg = {
4069 .fh = NFS_FH(inode),
4070 .dir_fh = NFS_FH(dir),
4072 .bitmask = server->attr_bitmask,
4074 struct nfs4_link_res res = {
4078 struct rpc_message msg = {
4079 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
4083 int status = -ENOMEM;
4085 res.fattr = nfs_alloc_fattr();
4086 if (res.fattr == NULL)
4089 res.label = nfs4_label_alloc(server, GFP_KERNEL);
4090 if (IS_ERR(res.label)) {
4091 status = PTR_ERR(res.label);
4094 arg.bitmask = nfs4_bitmask(server, res.label);
4096 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4098 update_changeattr(dir, &res.cinfo, res.fattr->time_start);
4099 status = nfs_post_op_update_inode(inode, res.fattr);
4101 nfs_setsecurity(inode, res.fattr, res.label);
4105 nfs4_label_free(res.label);
4108 nfs_free_fattr(res.fattr);
4112 static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
4114 struct nfs4_exception exception = { };
4117 err = nfs4_handle_exception(NFS_SERVER(inode),
4118 _nfs4_proc_link(inode, dir, name),
4120 } while (exception.retry);
4124 struct nfs4_createdata {
4125 struct rpc_message msg;
4126 struct nfs4_create_arg arg;
4127 struct nfs4_create_res res;
4129 struct nfs_fattr fattr;
4130 struct nfs4_label *label;
4133 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
4134 const struct qstr *name, struct iattr *sattr, u32 ftype)
4136 struct nfs4_createdata *data;
4138 data = kzalloc(sizeof(*data), GFP_KERNEL);
4140 struct nfs_server *server = NFS_SERVER(dir);
4142 data->label = nfs4_label_alloc(server, GFP_KERNEL);
4143 if (IS_ERR(data->label))
4146 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
4147 data->msg.rpc_argp = &data->arg;
4148 data->msg.rpc_resp = &data->res;
4149 data->arg.dir_fh = NFS_FH(dir);
4150 data->arg.server = server;
4151 data->arg.name = name;
4152 data->arg.attrs = sattr;
4153 data->arg.ftype = ftype;
4154 data->arg.bitmask = nfs4_bitmask(server, data->label);
4155 data->arg.umask = current_umask();
4156 data->res.server = server;
4157 data->res.fh = &data->fh;
4158 data->res.fattr = &data->fattr;
4159 data->res.label = data->label;
4160 nfs_fattr_init(data->res.fattr);
4168 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
4170 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
4171 &data->arg.seq_args, &data->res.seq_res, 1);
4173 update_changeattr(dir, &data->res.dir_cinfo,
4174 data->res.fattr->time_start);
4175 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
4180 static void nfs4_free_createdata(struct nfs4_createdata *data)
4182 nfs4_label_free(data->label);
4186 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
4187 struct page *page, unsigned int len, struct iattr *sattr,
4188 struct nfs4_label *label)
4190 struct nfs4_createdata *data;
4191 int status = -ENAMETOOLONG;
4193 if (len > NFS4_MAXPATHLEN)
4197 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
4201 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
4202 data->arg.u.symlink.pages = &page;
4203 data->arg.u.symlink.len = len;
4204 data->arg.label = label;
4206 status = nfs4_do_create(dir, dentry, data);
4208 nfs4_free_createdata(data);
4213 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
4214 struct page *page, unsigned int len, struct iattr *sattr)
4216 struct nfs4_exception exception = { };
4217 struct nfs4_label l, *label = NULL;
4220 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4223 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
4224 trace_nfs4_symlink(dir, &dentry->d_name, err);
4225 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4227 } while (exception.retry);
4229 nfs4_label_release_security(label);
4233 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4234 struct iattr *sattr, struct nfs4_label *label)
4236 struct nfs4_createdata *data;
4237 int status = -ENOMEM;
4239 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4243 data->arg.label = label;
4244 status = nfs4_do_create(dir, dentry, data);
4246 nfs4_free_createdata(data);
4251 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4252 struct iattr *sattr)
4254 struct nfs_server *server = NFS_SERVER(dir);
4255 struct nfs4_exception exception = { };
4256 struct nfs4_label l, *label = NULL;
4259 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4261 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4262 sattr->ia_mode &= ~current_umask();
4264 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4265 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4266 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4268 } while (exception.retry);
4269 nfs4_label_release_security(label);
4274 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
4275 u64 cookie, struct page **pages, unsigned int count, int plus)
4277 struct inode *dir = d_inode(dentry);
4278 struct nfs4_readdir_arg args = {
4283 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
4286 struct nfs4_readdir_res res;
4287 struct rpc_message msg = {
4288 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4295 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4297 (unsigned long long)cookie);
4298 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
4299 res.pgbase = args.pgbase;
4300 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4302 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
4303 status += args.pgbase;
4306 nfs_invalidate_atime(dir);
4308 dprintk("%s: returns %d\n", __func__, status);
4312 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
4313 u64 cookie, struct page **pages, unsigned int count, int plus)
4315 struct nfs4_exception exception = { };
4318 err = _nfs4_proc_readdir(dentry, cred, cookie,
4319 pages, count, plus);
4320 trace_nfs4_readdir(d_inode(dentry), err);
4321 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
4323 } while (exception.retry);
4327 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4328 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
4330 struct nfs4_createdata *data;
4331 int mode = sattr->ia_mode;
4332 int status = -ENOMEM;
4334 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4339 data->arg.ftype = NF4FIFO;
4340 else if (S_ISBLK(mode)) {
4341 data->arg.ftype = NF4BLK;
4342 data->arg.u.device.specdata1 = MAJOR(rdev);
4343 data->arg.u.device.specdata2 = MINOR(rdev);
4345 else if (S_ISCHR(mode)) {
4346 data->arg.ftype = NF4CHR;
4347 data->arg.u.device.specdata1 = MAJOR(rdev);
4348 data->arg.u.device.specdata2 = MINOR(rdev);
4349 } else if (!S_ISSOCK(mode)) {
4354 data->arg.label = label;
4355 status = nfs4_do_create(dir, dentry, data);
4357 nfs4_free_createdata(data);
4362 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4363 struct iattr *sattr, dev_t rdev)
4365 struct nfs_server *server = NFS_SERVER(dir);
4366 struct nfs4_exception exception = { };
4367 struct nfs4_label l, *label = NULL;
4370 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4372 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4373 sattr->ia_mode &= ~current_umask();
4375 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4376 trace_nfs4_mknod(dir, &dentry->d_name, err);
4377 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4379 } while (exception.retry);
4381 nfs4_label_release_security(label);
4386 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4387 struct nfs_fsstat *fsstat)
4389 struct nfs4_statfs_arg args = {
4391 .bitmask = server->attr_bitmask,
4393 struct nfs4_statfs_res res = {
4396 struct rpc_message msg = {
4397 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4402 nfs_fattr_init(fsstat->fattr);
4403 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4406 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4408 struct nfs4_exception exception = { };
4411 err = nfs4_handle_exception(server,
4412 _nfs4_proc_statfs(server, fhandle, fsstat),
4414 } while (exception.retry);
4418 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4419 struct nfs_fsinfo *fsinfo)
4421 struct nfs4_fsinfo_arg args = {
4423 .bitmask = server->attr_bitmask,
4425 struct nfs4_fsinfo_res res = {
4428 struct rpc_message msg = {
4429 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4434 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4437 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4439 struct nfs4_exception exception = { };
4440 unsigned long now = jiffies;
4444 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
4445 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
4447 nfs4_set_lease_period(server->nfs_client,
4448 fsinfo->lease_time * HZ,
4452 err = nfs4_handle_exception(server, err, &exception);
4453 } while (exception.retry);
4457 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4461 nfs_fattr_init(fsinfo->fattr);
4462 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
4464 /* block layout checks this! */
4465 server->pnfs_blksize = fsinfo->blksize;
4466 set_pnfs_layoutdriver(server, fhandle, fsinfo);
4472 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4473 struct nfs_pathconf *pathconf)
4475 struct nfs4_pathconf_arg args = {
4477 .bitmask = server->attr_bitmask,
4479 struct nfs4_pathconf_res res = {
4480 .pathconf = pathconf,
4482 struct rpc_message msg = {
4483 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4488 /* None of the pathconf attributes are mandatory to implement */
4489 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4490 memset(pathconf, 0, sizeof(*pathconf));
4494 nfs_fattr_init(pathconf->fattr);
4495 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4498 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4499 struct nfs_pathconf *pathconf)
4501 struct nfs4_exception exception = { };
4505 err = nfs4_handle_exception(server,
4506 _nfs4_proc_pathconf(server, fhandle, pathconf),
4508 } while (exception.retry);
4512 int nfs4_set_rw_stateid(nfs4_stateid *stateid,
4513 const struct nfs_open_context *ctx,
4514 const struct nfs_lock_context *l_ctx,
4517 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL);
4519 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4521 static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4522 const struct nfs_open_context *ctx,
4523 const struct nfs_lock_context *l_ctx,
4526 nfs4_stateid current_stateid;
4528 /* If the current stateid represents a lost lock, then exit */
4529 if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode) == -EIO)
4531 return nfs4_stateid_match(stateid, ¤t_stateid);
4534 static bool nfs4_error_stateid_expired(int err)
4537 case -NFS4ERR_DELEG_REVOKED:
4538 case -NFS4ERR_ADMIN_REVOKED:
4539 case -NFS4ERR_BAD_STATEID:
4540 case -NFS4ERR_STALE_STATEID:
4541 case -NFS4ERR_OLD_STATEID:
4542 case -NFS4ERR_OPENMODE:
4543 case -NFS4ERR_EXPIRED:
4549 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
4551 struct nfs_server *server = NFS_SERVER(hdr->inode);
4553 trace_nfs4_read(hdr, task->tk_status);
4554 if (task->tk_status < 0) {
4555 struct nfs4_exception exception = {
4556 .inode = hdr->inode,
4557 .state = hdr->args.context->state,
4558 .stateid = &hdr->args.stateid,
4560 task->tk_status = nfs4_async_handle_exception(task,
4561 server, task->tk_status, &exception);
4562 if (exception.retry) {
4563 rpc_restart_call_prepare(task);
4568 if (task->tk_status > 0)
4569 renew_lease(server, hdr->timestamp);
4573 static bool nfs4_read_stateid_changed(struct rpc_task *task,
4574 struct nfs_pgio_args *args)
4577 if (!nfs4_error_stateid_expired(task->tk_status) ||
4578 nfs4_stateid_is_current(&args->stateid,
4583 rpc_restart_call_prepare(task);
4587 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4590 dprintk("--> %s\n", __func__);
4592 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4594 if (nfs4_read_stateid_changed(task, &hdr->args))
4596 if (task->tk_status > 0)
4597 nfs_invalidate_atime(hdr->inode);
4598 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4599 nfs4_read_done_cb(task, hdr);
4602 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4603 struct rpc_message *msg)
4605 hdr->timestamp = jiffies;
4606 if (!hdr->pgio_done_cb)
4607 hdr->pgio_done_cb = nfs4_read_done_cb;
4608 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
4609 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
4612 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4613 struct nfs_pgio_header *hdr)
4615 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client,
4616 &hdr->args.seq_args,
4620 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4621 hdr->args.lock_context,
4622 hdr->rw_mode) == -EIO)
4624 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
4629 static int nfs4_write_done_cb(struct rpc_task *task,
4630 struct nfs_pgio_header *hdr)
4632 struct inode *inode = hdr->inode;
4634 trace_nfs4_write(hdr, task->tk_status);
4635 if (task->tk_status < 0) {
4636 struct nfs4_exception exception = {
4637 .inode = hdr->inode,
4638 .state = hdr->args.context->state,
4639 .stateid = &hdr->args.stateid,
4641 task->tk_status = nfs4_async_handle_exception(task,
4642 NFS_SERVER(inode), task->tk_status,
4644 if (exception.retry) {
4645 rpc_restart_call_prepare(task);
4649 if (task->tk_status >= 0) {
4650 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4651 nfs_writeback_update_inode(hdr);
4656 static bool nfs4_write_stateid_changed(struct rpc_task *task,
4657 struct nfs_pgio_args *args)
4660 if (!nfs4_error_stateid_expired(task->tk_status) ||
4661 nfs4_stateid_is_current(&args->stateid,
4666 rpc_restart_call_prepare(task);
4670 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4672 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4674 if (nfs4_write_stateid_changed(task, &hdr->args))
4676 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4677 nfs4_write_done_cb(task, hdr);
4681 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
4683 /* Don't request attributes for pNFS or O_DIRECT writes */
4684 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
4686 /* Otherwise, request attributes if and only if we don't hold
4689 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
4692 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4693 struct rpc_message *msg)
4695 struct nfs_server *server = NFS_SERVER(hdr->inode);
4697 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4698 hdr->args.bitmask = NULL;
4699 hdr->res.fattr = NULL;
4701 hdr->args.bitmask = server->cache_consistency_bitmask;
4703 if (!hdr->pgio_done_cb)
4704 hdr->pgio_done_cb = nfs4_write_done_cb;
4705 hdr->res.server = server;
4706 hdr->timestamp = jiffies;
4708 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
4709 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
4712 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
4714 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client,
4715 &data->args.seq_args,
4720 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
4722 struct inode *inode = data->inode;
4724 trace_nfs4_commit(data, task->tk_status);
4725 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4726 NULL, NULL) == -EAGAIN) {
4727 rpc_restart_call_prepare(task);
4733 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
4735 if (!nfs4_sequence_done(task, &data->res.seq_res))
4737 return data->commit_done_cb(task, data);
4740 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
4742 struct nfs_server *server = NFS_SERVER(data->inode);
4744 if (data->commit_done_cb == NULL)
4745 data->commit_done_cb = nfs4_commit_done_cb;
4746 data->res.server = server;
4747 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
4748 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4751 struct nfs4_renewdata {
4752 struct nfs_client *client;
4753 unsigned long timestamp;
4757 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4758 * standalone procedure for queueing an asynchronous RENEW.
4760 static void nfs4_renew_release(void *calldata)
4762 struct nfs4_renewdata *data = calldata;
4763 struct nfs_client *clp = data->client;
4765 if (atomic_read(&clp->cl_count) > 1)
4766 nfs4_schedule_state_renewal(clp);
4767 nfs_put_client(clp);
4771 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
4773 struct nfs4_renewdata *data = calldata;
4774 struct nfs_client *clp = data->client;
4775 unsigned long timestamp = data->timestamp;
4777 trace_nfs4_renew_async(clp, task->tk_status);
4778 switch (task->tk_status) {
4781 case -NFS4ERR_LEASE_MOVED:
4782 nfs4_schedule_lease_moved_recovery(clp);
4785 /* Unless we're shutting down, schedule state recovery! */
4786 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4788 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
4789 nfs4_schedule_lease_recovery(clp);
4792 nfs4_schedule_path_down_recovery(clp);
4794 do_renew_lease(clp, timestamp);
4797 static const struct rpc_call_ops nfs4_renew_ops = {
4798 .rpc_call_done = nfs4_renew_done,
4799 .rpc_release = nfs4_renew_release,
4802 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
4804 struct rpc_message msg = {
4805 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4809 struct nfs4_renewdata *data;
4811 if (renew_flags == 0)
4813 if (!atomic_inc_not_zero(&clp->cl_count))
4815 data = kmalloc(sizeof(*data), GFP_NOFS);
4817 nfs_put_client(clp);
4821 data->timestamp = jiffies;
4822 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
4823 &nfs4_renew_ops, data);
4826 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
4828 struct rpc_message msg = {
4829 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4833 unsigned long now = jiffies;
4836 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4839 do_renew_lease(clp, now);
4843 static inline int nfs4_server_supports_acls(struct nfs_server *server)
4845 return server->caps & NFS_CAP_ACLS;
4848 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4849 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
4852 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
4854 static int buf_to_pages_noslab(const void *buf, size_t buflen,
4855 struct page **pages)
4857 struct page *newpage, **spages;
4863 len = min_t(size_t, PAGE_SIZE, buflen);
4864 newpage = alloc_page(GFP_KERNEL);
4866 if (newpage == NULL)
4868 memcpy(page_address(newpage), buf, len);
4873 } while (buflen != 0);
4879 __free_page(spages[rc-1]);
4883 struct nfs4_cached_acl {
4889 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4891 struct nfs_inode *nfsi = NFS_I(inode);
4893 spin_lock(&inode->i_lock);
4894 kfree(nfsi->nfs4_acl);
4895 nfsi->nfs4_acl = acl;
4896 spin_unlock(&inode->i_lock);
4899 static void nfs4_zap_acl_attr(struct inode *inode)
4901 nfs4_set_cached_acl(inode, NULL);
4904 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4906 struct nfs_inode *nfsi = NFS_I(inode);
4907 struct nfs4_cached_acl *acl;
4910 spin_lock(&inode->i_lock);
4911 acl = nfsi->nfs4_acl;
4914 if (buf == NULL) /* user is just asking for length */
4916 if (acl->cached == 0)
4918 ret = -ERANGE; /* see getxattr(2) man page */
4919 if (acl->len > buflen)
4921 memcpy(buf, acl->data, acl->len);
4925 spin_unlock(&inode->i_lock);
4929 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
4931 struct nfs4_cached_acl *acl;
4932 size_t buflen = sizeof(*acl) + acl_len;
4934 if (buflen <= PAGE_SIZE) {
4935 acl = kmalloc(buflen, GFP_KERNEL);
4939 _copy_from_pages(acl->data, pages, pgbase, acl_len);
4941 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4948 nfs4_set_cached_acl(inode, acl);
4952 * The getxattr API returns the required buffer length when called with a
4953 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4954 * the required buf. On a NULL buf, we send a page of data to the server
4955 * guessing that the ACL request can be serviced by a page. If so, we cache
4956 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4957 * the cache. If not so, we throw away the page, and cache the required
4958 * length. The next getxattr call will then produce another round trip to
4959 * the server, this time with the input buf of the required size.
4961 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4963 struct page *pages[NFS4ACL_MAXPAGES + 1] = {NULL, };
4964 struct nfs_getaclargs args = {
4965 .fh = NFS_FH(inode),
4969 struct nfs_getaclres res = {
4972 struct rpc_message msg = {
4973 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4977 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1;
4978 int ret = -ENOMEM, i;
4980 if (npages > ARRAY_SIZE(pages))
4983 for (i = 0; i < npages; i++) {
4984 pages[i] = alloc_page(GFP_KERNEL);
4989 /* for decoding across pages */
4990 res.acl_scratch = alloc_page(GFP_KERNEL);
4991 if (!res.acl_scratch)
4994 args.acl_len = npages * PAGE_SIZE;
4996 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
4997 __func__, buf, buflen, npages, args.acl_len);
4998 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4999 &msg, &args.seq_args, &res.seq_res, 0);
5003 /* Handle the case where the passed-in buffer is too short */
5004 if (res.acl_flags & NFS4_ACL_TRUNC) {
5005 /* Did the user only issue a request for the acl length? */
5011 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
5013 if (res.acl_len > buflen) {
5017 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
5022 for (i = 0; i < npages; i++)
5024 __free_page(pages[i]);
5025 if (res.acl_scratch)
5026 __free_page(res.acl_scratch);
5030 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
5032 struct nfs4_exception exception = { };
5035 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
5036 trace_nfs4_get_acl(inode, ret);
5039 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
5040 } while (exception.retry);
5044 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
5046 struct nfs_server *server = NFS_SERVER(inode);
5049 if (!nfs4_server_supports_acls(server))
5051 ret = nfs_revalidate_inode(server, inode);
5054 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
5055 nfs_zap_acl_cache(inode);
5056 ret = nfs4_read_cached_acl(inode, buf, buflen);
5058 /* -ENOENT is returned if there is no ACL or if there is an ACL
5059 * but no cached acl data, just the acl length */
5061 return nfs4_get_acl_uncached(inode, buf, buflen);
5064 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5066 struct nfs_server *server = NFS_SERVER(inode);
5067 struct page *pages[NFS4ACL_MAXPAGES];
5068 struct nfs_setaclargs arg = {
5069 .fh = NFS_FH(inode),
5073 struct nfs_setaclres res;
5074 struct rpc_message msg = {
5075 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
5079 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
5082 if (!nfs4_server_supports_acls(server))
5084 if (npages > ARRAY_SIZE(pages))
5086 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
5089 nfs4_inode_return_delegation(inode);
5090 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5093 * Free each page after tx, so the only ref left is
5094 * held by the network stack
5097 put_page(pages[i-1]);
5100 * Acl update can result in inode attribute update.
5101 * so mark the attribute cache invalid.
5103 spin_lock(&inode->i_lock);
5104 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
5105 spin_unlock(&inode->i_lock);
5106 nfs_access_zap_cache(inode);
5107 nfs_zap_acl_cache(inode);
5111 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5113 struct nfs4_exception exception = { };
5116 err = __nfs4_proc_set_acl(inode, buf, buflen);
5117 trace_nfs4_set_acl(inode, err);
5118 err = nfs4_handle_exception(NFS_SERVER(inode), err,
5120 } while (exception.retry);
5124 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
5125 static int _nfs4_get_security_label(struct inode *inode, void *buf,
5128 struct nfs_server *server = NFS_SERVER(inode);
5129 struct nfs_fattr fattr;
5130 struct nfs4_label label = {0, 0, buflen, buf};
5132 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
5133 struct nfs4_getattr_arg arg = {
5134 .fh = NFS_FH(inode),
5137 struct nfs4_getattr_res res = {
5142 struct rpc_message msg = {
5143 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
5149 nfs_fattr_init(&fattr);
5151 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
5154 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
5156 if (buflen < label.len)
5161 static int nfs4_get_security_label(struct inode *inode, void *buf,
5164 struct nfs4_exception exception = { };
5167 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5171 err = _nfs4_get_security_label(inode, buf, buflen);
5172 trace_nfs4_get_security_label(inode, err);
5173 err = nfs4_handle_exception(NFS_SERVER(inode), err,
5175 } while (exception.retry);
5179 static int _nfs4_do_set_security_label(struct inode *inode,
5180 struct nfs4_label *ilabel,
5181 struct nfs_fattr *fattr,
5182 struct nfs4_label *olabel)
5185 struct iattr sattr = {0};
5186 struct nfs_server *server = NFS_SERVER(inode);
5187 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
5188 struct nfs_setattrargs arg = {
5189 .fh = NFS_FH(inode),
5195 struct nfs_setattrres res = {
5200 struct rpc_message msg = {
5201 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
5207 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
5209 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5211 dprintk("%s failed: %d\n", __func__, status);
5216 static int nfs4_do_set_security_label(struct inode *inode,
5217 struct nfs4_label *ilabel,
5218 struct nfs_fattr *fattr,
5219 struct nfs4_label *olabel)
5221 struct nfs4_exception exception = { };
5225 err = _nfs4_do_set_security_label(inode, ilabel,
5227 trace_nfs4_set_security_label(inode, err);
5228 err = nfs4_handle_exception(NFS_SERVER(inode), err,
5230 } while (exception.retry);
5235 nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen)
5237 struct nfs4_label ilabel, *olabel = NULL;
5238 struct nfs_fattr fattr;
5239 struct rpc_cred *cred;
5242 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5245 nfs_fattr_init(&fattr);
5249 ilabel.label = (char *)buf;
5250 ilabel.len = buflen;
5252 cred = rpc_lookup_cred();
5254 return PTR_ERR(cred);
5256 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5257 if (IS_ERR(olabel)) {
5258 status = -PTR_ERR(olabel);
5262 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5264 nfs_setsecurity(inode, &fattr, olabel);
5266 nfs4_label_free(olabel);
5271 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */
5274 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5275 nfs4_verifier *bootverf)
5279 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5280 /* An impossible timestamp guarantees this value
5281 * will never match a generated boot time. */
5282 verf[0] = cpu_to_be32(U32_MAX);
5283 verf[1] = cpu_to_be32(U32_MAX);
5285 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
5286 u64 ns = ktime_to_ns(nn->boot_time);
5288 verf[0] = cpu_to_be32(ns >> 32);
5289 verf[1] = cpu_to_be32(ns);
5291 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5295 nfs4_init_nonuniform_client_string(struct nfs_client *clp)
5300 if (clp->cl_owner_id != NULL)
5304 len = 14 + strlen(clp->cl_ipaddr) + 1 +
5305 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5307 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5311 if (len > NFS4_OPAQUE_LIMIT + 1)
5315 * Since this string is allocated at mount time, and held until the
5316 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5317 * about a memory-reclaim deadlock.
5319 str = kmalloc(len, GFP_KERNEL);
5324 scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
5326 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5327 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
5330 clp->cl_owner_id = str;
5335 nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5340 len = 10 + 10 + 1 + 10 + 1 +
5341 strlen(nfs4_client_id_uniquifier) + 1 +
5342 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5344 if (len > NFS4_OPAQUE_LIMIT + 1)
5348 * Since this string is allocated at mount time, and held until the
5349 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5350 * about a memory-reclaim deadlock.
5352 str = kmalloc(len, GFP_KERNEL);
5356 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
5357 clp->rpc_ops->version, clp->cl_minorversion,
5358 nfs4_client_id_uniquifier,
5359 clp->cl_rpcclient->cl_nodename);
5360 clp->cl_owner_id = str;
5365 nfs4_init_uniform_client_string(struct nfs_client *clp)
5370 if (clp->cl_owner_id != NULL)
5373 if (nfs4_client_id_uniquifier[0] != '\0')
5374 return nfs4_init_uniquifier_client_string(clp);
5376 len = 10 + 10 + 1 + 10 + 1 +
5377 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5379 if (len > NFS4_OPAQUE_LIMIT + 1)
5383 * Since this string is allocated at mount time, and held until the
5384 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5385 * about a memory-reclaim deadlock.
5387 str = kmalloc(len, GFP_KERNEL);
5391 scnprintf(str, len, "Linux NFSv%u.%u %s",
5392 clp->rpc_ops->version, clp->cl_minorversion,
5393 clp->cl_rpcclient->cl_nodename);
5394 clp->cl_owner_id = str;
5399 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5400 * services. Advertise one based on the address family of the
5404 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5406 if (strchr(clp->cl_ipaddr, ':') != NULL)
5407 return scnprintf(buf, len, "tcp6");
5409 return scnprintf(buf, len, "tcp");
5412 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5414 struct nfs4_setclientid *sc = calldata;
5416 if (task->tk_status == 0)
5417 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5420 static const struct rpc_call_ops nfs4_setclientid_ops = {
5421 .rpc_call_done = nfs4_setclientid_done,
5425 * nfs4_proc_setclientid - Negotiate client ID
5426 * @clp: state data structure
5427 * @program: RPC program for NFSv4 callback service
5428 * @port: IP port number for NFS4 callback service
5429 * @cred: RPC credential to use for this call
5430 * @res: where to place the result
5432 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5434 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5435 unsigned short port, struct rpc_cred *cred,
5436 struct nfs4_setclientid_res *res)
5438 nfs4_verifier sc_verifier;
5439 struct nfs4_setclientid setclientid = {
5440 .sc_verifier = &sc_verifier,
5444 struct rpc_message msg = {
5445 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5446 .rpc_argp = &setclientid,
5450 struct rpc_task *task;
5451 struct rpc_task_setup task_setup_data = {
5452 .rpc_client = clp->cl_rpcclient,
5453 .rpc_message = &msg,
5454 .callback_ops = &nfs4_setclientid_ops,
5455 .callback_data = &setclientid,
5456 .flags = RPC_TASK_TIMEOUT,
5460 /* nfs_client_id4 */
5461 nfs4_init_boot_verifier(clp, &sc_verifier);
5463 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5464 status = nfs4_init_uniform_client_string(clp);
5466 status = nfs4_init_nonuniform_client_string(clp);
5472 setclientid.sc_netid_len =
5473 nfs4_init_callback_netid(clp,
5474 setclientid.sc_netid,
5475 sizeof(setclientid.sc_netid));
5476 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
5477 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
5478 clp->cl_ipaddr, port >> 8, port & 255);
5480 dprintk("NFS call setclientid auth=%s, '%s'\n",
5481 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5483 task = rpc_run_task(&task_setup_data);
5485 status = PTR_ERR(task);
5488 status = task->tk_status;
5489 if (setclientid.sc_cred) {
5490 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5491 put_rpccred(setclientid.sc_cred);
5495 trace_nfs4_setclientid(clp, status);
5496 dprintk("NFS reply setclientid: %d\n", status);
5501 * nfs4_proc_setclientid_confirm - Confirm client ID
5502 * @clp: state data structure
5503 * @res: result of a previous SETCLIENTID
5504 * @cred: RPC credential to use for this call
5506 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5508 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
5509 struct nfs4_setclientid_res *arg,
5510 struct rpc_cred *cred)
5512 struct rpc_message msg = {
5513 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
5519 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5520 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5522 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5523 trace_nfs4_setclientid_confirm(clp, status);
5524 dprintk("NFS reply setclientid_confirm: %d\n", status);
5528 struct nfs4_delegreturndata {
5529 struct nfs4_delegreturnargs args;
5530 struct nfs4_delegreturnres res;
5532 nfs4_stateid stateid;
5533 unsigned long timestamp;
5535 struct nfs4_layoutreturn_args arg;
5536 struct nfs4_layoutreturn_res res;
5537 struct nfs4_xdr_opaque_data ld_private;
5541 struct nfs_fattr fattr;
5543 struct inode *inode;
5546 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5548 struct nfs4_delegreturndata *data = calldata;
5550 if (!nfs4_sequence_done(task, &data->res.seq_res))
5553 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
5555 /* Handle Layoutreturn errors */
5556 if (data->args.lr_args && task->tk_status != 0) {
5557 switch(data->res.lr_ret) {
5559 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
5562 data->args.lr_args = NULL;
5563 data->res.lr_res = NULL;
5565 case -NFS4ERR_ADMIN_REVOKED:
5566 case -NFS4ERR_DELEG_REVOKED:
5567 case -NFS4ERR_EXPIRED:
5568 case -NFS4ERR_BAD_STATEID:
5569 case -NFS4ERR_OLD_STATEID:
5570 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
5571 case -NFS4ERR_WRONG_CRED:
5572 data->args.lr_args = NULL;
5573 data->res.lr_res = NULL;
5574 data->res.lr_ret = 0;
5575 rpc_restart_call_prepare(task);
5580 switch (task->tk_status) {
5582 renew_lease(data->res.server, data->timestamp);
5584 case -NFS4ERR_ADMIN_REVOKED:
5585 case -NFS4ERR_DELEG_REVOKED:
5586 case -NFS4ERR_EXPIRED:
5587 nfs4_free_revoked_stateid(data->res.server,
5589 task->tk_msg.rpc_cred);
5590 case -NFS4ERR_BAD_STATEID:
5591 case -NFS4ERR_OLD_STATEID:
5592 case -NFS4ERR_STALE_STATEID:
5593 task->tk_status = 0;
5595 case -NFS4ERR_ACCESS:
5596 if (data->args.bitmask) {
5597 data->args.bitmask = NULL;
5598 data->res.fattr = NULL;
5599 task->tk_status = 0;
5600 rpc_restart_call_prepare(task);
5604 if (nfs4_async_handle_error(task, data->res.server,
5605 NULL, NULL) == -EAGAIN) {
5606 rpc_restart_call_prepare(task);
5610 data->rpc_status = task->tk_status;
5613 static void nfs4_delegreturn_release(void *calldata)
5615 struct nfs4_delegreturndata *data = calldata;
5616 struct inode *inode = data->inode;
5620 pnfs_roc_release(&data->lr.arg, &data->lr.res,
5622 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5623 nfs_iput_and_deactive(inode);
5628 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5630 struct nfs4_delegreturndata *d_data;
5632 d_data = (struct nfs4_delegreturndata *)data;
5634 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task))
5637 nfs4_setup_sequence(d_data->res.server->nfs_client,
5638 &d_data->args.seq_args,
5639 &d_data->res.seq_res,
5643 static const struct rpc_call_ops nfs4_delegreturn_ops = {
5644 .rpc_call_prepare = nfs4_delegreturn_prepare,
5645 .rpc_call_done = nfs4_delegreturn_done,
5646 .rpc_release = nfs4_delegreturn_release,
5649 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5651 struct nfs4_delegreturndata *data;
5652 struct nfs_server *server = NFS_SERVER(inode);
5653 struct rpc_task *task;
5654 struct rpc_message msg = {
5655 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5658 struct rpc_task_setup task_setup_data = {
5659 .rpc_client = server->client,
5660 .rpc_message = &msg,
5661 .callback_ops = &nfs4_delegreturn_ops,
5662 .flags = RPC_TASK_ASYNC,
5666 data = kzalloc(sizeof(*data), GFP_NOFS);
5669 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
5671 nfs4_state_protect(server->nfs_client,
5672 NFS_SP4_MACH_CRED_CLEANUP,
5673 &task_setup_data.rpc_client, &msg);
5675 data->args.fhandle = &data->fh;
5676 data->args.stateid = &data->stateid;
5677 data->args.bitmask = server->cache_consistency_bitmask;
5678 nfs_copy_fh(&data->fh, NFS_FH(inode));
5679 nfs4_stateid_copy(&data->stateid, stateid);
5680 data->res.fattr = &data->fattr;
5681 data->res.server = server;
5682 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
5683 data->lr.arg.ld_private = &data->lr.ld_private;
5684 nfs_fattr_init(data->res.fattr);
5685 data->timestamp = jiffies;
5686 data->rpc_status = 0;
5687 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, cred);
5688 data->inode = nfs_igrab_and_active(inode);
5691 data->args.lr_args = &data->lr.arg;
5692 data->res.lr_res = &data->lr.res;
5694 } else if (data->lr.roc) {
5695 pnfs_roc_release(&data->lr.arg, &data->lr.res, 0);
5696 data->lr.roc = false;
5699 task_setup_data.callback_data = data;
5700 msg.rpc_argp = &data->args;
5701 msg.rpc_resp = &data->res;
5702 task = rpc_run_task(&task_setup_data);
5704 return PTR_ERR(task);
5707 status = rpc_wait_for_completion_task(task);
5710 status = data->rpc_status;
5716 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5718 struct nfs_server *server = NFS_SERVER(inode);
5719 struct nfs4_exception exception = { };
5722 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
5723 trace_nfs4_delegreturn(inode, stateid, err);
5725 case -NFS4ERR_STALE_STATEID:
5726 case -NFS4ERR_EXPIRED:
5730 err = nfs4_handle_exception(server, err, &exception);
5731 } while (exception.retry);
5735 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5737 struct inode *inode = state->inode;
5738 struct nfs_server *server = NFS_SERVER(inode);
5739 struct nfs_client *clp = server->nfs_client;
5740 struct nfs_lockt_args arg = {
5741 .fh = NFS_FH(inode),
5744 struct nfs_lockt_res res = {
5747 struct rpc_message msg = {
5748 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5751 .rpc_cred = state->owner->so_cred,
5753 struct nfs4_lock_state *lsp;
5756 arg.lock_owner.clientid = clp->cl_clientid;
5757 status = nfs4_set_lock_state(state, request);
5760 lsp = request->fl_u.nfs4_fl.owner;
5761 arg.lock_owner.id = lsp->ls_seqid.owner_id;
5762 arg.lock_owner.s_dev = server->s_dev;
5763 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5766 request->fl_type = F_UNLCK;
5768 case -NFS4ERR_DENIED:
5771 request->fl_ops->fl_release_private(request);
5772 request->fl_ops = NULL;
5777 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5779 struct nfs4_exception exception = { };
5783 err = _nfs4_proc_getlk(state, cmd, request);
5784 trace_nfs4_get_lock(request, state, cmd, err);
5785 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
5787 } while (exception.retry);
5791 struct nfs4_unlockdata {
5792 struct nfs_locku_args arg;
5793 struct nfs_locku_res res;
5794 struct nfs4_lock_state *lsp;
5795 struct nfs_open_context *ctx;
5796 struct nfs_lock_context *l_ctx;
5797 struct file_lock fl;
5798 struct nfs_server *server;
5799 unsigned long timestamp;
5802 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5803 struct nfs_open_context *ctx,
5804 struct nfs4_lock_state *lsp,
5805 struct nfs_seqid *seqid)
5807 struct nfs4_unlockdata *p;
5808 struct inode *inode = lsp->ls_state->inode;
5810 p = kzalloc(sizeof(*p), GFP_NOFS);
5813 p->arg.fh = NFS_FH(inode);
5815 p->arg.seqid = seqid;
5816 p->res.seqid = seqid;
5818 atomic_inc(&lsp->ls_count);
5819 /* Ensure we don't close file until we're done freeing locks! */
5820 p->ctx = get_nfs_open_context(ctx);
5821 p->l_ctx = nfs_get_lock_context(ctx);
5822 memcpy(&p->fl, fl, sizeof(p->fl));
5823 p->server = NFS_SERVER(inode);
5827 static void nfs4_locku_release_calldata(void *data)
5829 struct nfs4_unlockdata *calldata = data;
5830 nfs_free_seqid(calldata->arg.seqid);
5831 nfs4_put_lock_state(calldata->lsp);
5832 nfs_put_lock_context(calldata->l_ctx);
5833 put_nfs_open_context(calldata->ctx);
5837 static void nfs4_locku_done(struct rpc_task *task, void *data)
5839 struct nfs4_unlockdata *calldata = data;
5841 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5843 switch (task->tk_status) {
5845 renew_lease(calldata->server, calldata->timestamp);
5846 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl);
5847 if (nfs4_update_lock_stateid(calldata->lsp,
5848 &calldata->res.stateid))
5850 case -NFS4ERR_ADMIN_REVOKED:
5851 case -NFS4ERR_EXPIRED:
5852 nfs4_free_revoked_stateid(calldata->server,
5853 &calldata->arg.stateid,
5854 task->tk_msg.rpc_cred);
5855 case -NFS4ERR_BAD_STATEID:
5856 case -NFS4ERR_OLD_STATEID:
5857 case -NFS4ERR_STALE_STATEID:
5858 if (!nfs4_stateid_match(&calldata->arg.stateid,
5859 &calldata->lsp->ls_stateid))
5860 rpc_restart_call_prepare(task);
5863 if (nfs4_async_handle_error(task, calldata->server,
5864 NULL, NULL) == -EAGAIN)
5865 rpc_restart_call_prepare(task);
5867 nfs_release_seqid(calldata->arg.seqid);
5870 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
5872 struct nfs4_unlockdata *calldata = data;
5874 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) &&
5875 nfs_async_iocounter_wait(task, calldata->l_ctx))
5878 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
5880 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
5881 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
5882 /* Note: exit _without_ running nfs4_locku_done */
5885 calldata->timestamp = jiffies;
5886 if (nfs4_setup_sequence(calldata->server->nfs_client,
5887 &calldata->arg.seq_args,
5888 &calldata->res.seq_res,
5890 nfs_release_seqid(calldata->arg.seqid);
5893 task->tk_action = NULL;
5895 nfs4_sequence_done(task, &calldata->res.seq_res);
5898 static const struct rpc_call_ops nfs4_locku_ops = {
5899 .rpc_call_prepare = nfs4_locku_prepare,
5900 .rpc_call_done = nfs4_locku_done,
5901 .rpc_release = nfs4_locku_release_calldata,
5904 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5905 struct nfs_open_context *ctx,
5906 struct nfs4_lock_state *lsp,
5907 struct nfs_seqid *seqid)
5909 struct nfs4_unlockdata *data;
5910 struct rpc_message msg = {
5911 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5912 .rpc_cred = ctx->cred,
5914 struct rpc_task_setup task_setup_data = {
5915 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5916 .rpc_message = &msg,
5917 .callback_ops = &nfs4_locku_ops,
5918 .workqueue = nfsiod_workqueue,
5919 .flags = RPC_TASK_ASYNC,
5922 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5923 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5925 /* Ensure this is an unlock - when canceling a lock, the
5926 * canceled lock is passed in, and it won't be an unlock.
5928 fl->fl_type = F_UNLCK;
5929 if (fl->fl_flags & FL_CLOSE)
5930 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags);
5932 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5934 nfs_free_seqid(seqid);
5935 return ERR_PTR(-ENOMEM);
5938 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5939 msg.rpc_argp = &data->arg;
5940 msg.rpc_resp = &data->res;
5941 task_setup_data.callback_data = data;
5942 return rpc_run_task(&task_setup_data);
5945 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5947 struct inode *inode = state->inode;
5948 struct nfs4_state_owner *sp = state->owner;
5949 struct nfs_inode *nfsi = NFS_I(inode);
5950 struct nfs_seqid *seqid;
5951 struct nfs4_lock_state *lsp;
5952 struct rpc_task *task;
5953 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
5955 unsigned char fl_flags = request->fl_flags;
5957 status = nfs4_set_lock_state(state, request);
5958 /* Unlock _before_ we do the RPC call */
5959 request->fl_flags |= FL_EXISTS;
5960 /* Exclude nfs_delegation_claim_locks() */
5961 mutex_lock(&sp->so_delegreturn_mutex);
5962 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
5963 down_read(&nfsi->rwsem);
5964 if (locks_lock_inode_wait(inode, request) == -ENOENT) {
5965 up_read(&nfsi->rwsem);
5966 mutex_unlock(&sp->so_delegreturn_mutex);
5969 up_read(&nfsi->rwsem);
5970 mutex_unlock(&sp->so_delegreturn_mutex);
5973 /* Is this a delegated lock? */
5974 lsp = request->fl_u.nfs4_fl.owner;
5975 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5977 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5978 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
5982 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
5983 status = PTR_ERR(task);
5986 status = rpc_wait_for_completion_task(task);
5989 request->fl_flags = fl_flags;
5990 trace_nfs4_unlock(request, state, F_SETLK, status);
5994 struct nfs4_lockdata {
5995 struct nfs_lock_args arg;
5996 struct nfs_lock_res res;
5997 struct nfs4_lock_state *lsp;
5998 struct nfs_open_context *ctx;
5999 struct file_lock fl;
6000 unsigned long timestamp;
6003 struct nfs_server *server;
6006 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
6007 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
6010 struct nfs4_lockdata *p;
6011 struct inode *inode = lsp->ls_state->inode;
6012 struct nfs_server *server = NFS_SERVER(inode);
6013 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
6015 p = kzalloc(sizeof(*p), gfp_mask);
6019 p->arg.fh = NFS_FH(inode);
6021 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
6022 if (IS_ERR(p->arg.open_seqid))
6024 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
6025 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
6026 if (IS_ERR(p->arg.lock_seqid))
6027 goto out_free_seqid;
6028 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
6029 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
6030 p->arg.lock_owner.s_dev = server->s_dev;
6031 p->res.lock_seqid = p->arg.lock_seqid;
6034 atomic_inc(&lsp->ls_count);
6035 p->ctx = get_nfs_open_context(ctx);
6036 memcpy(&p->fl, fl, sizeof(p->fl));
6039 nfs_free_seqid(p->arg.open_seqid);
6045 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
6047 struct nfs4_lockdata *data = calldata;
6048 struct nfs4_state *state = data->lsp->ls_state;
6050 dprintk("%s: begin!\n", __func__);
6051 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
6053 /* Do we need to do an open_to_lock_owner? */
6054 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
6055 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
6056 goto out_release_lock_seqid;
6058 nfs4_stateid_copy(&data->arg.open_stateid,
6059 &state->open_stateid);
6060 data->arg.new_lock_owner = 1;
6061 data->res.open_seqid = data->arg.open_seqid;
6063 data->arg.new_lock_owner = 0;
6064 nfs4_stateid_copy(&data->arg.lock_stateid,
6065 &data->lsp->ls_stateid);
6067 if (!nfs4_valid_open_stateid(state)) {
6068 data->rpc_status = -EBADF;
6069 task->tk_action = NULL;
6070 goto out_release_open_seqid;
6072 data->timestamp = jiffies;
6073 if (nfs4_setup_sequence(data->server->nfs_client,
6074 &data->arg.seq_args,
6078 out_release_open_seqid:
6079 nfs_release_seqid(data->arg.open_seqid);
6080 out_release_lock_seqid:
6081 nfs_release_seqid(data->arg.lock_seqid);
6083 nfs4_sequence_done(task, &data->res.seq_res);
6084 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
6087 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
6089 struct nfs4_lockdata *data = calldata;
6090 struct nfs4_lock_state *lsp = data->lsp;
6092 dprintk("%s: begin!\n", __func__);
6094 if (!nfs4_sequence_done(task, &data->res.seq_res))
6097 data->rpc_status = task->tk_status;
6098 switch (task->tk_status) {
6100 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
6102 if (data->arg.new_lock) {
6103 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
6104 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) {
6105 rpc_restart_call_prepare(task);
6109 if (data->arg.new_lock_owner != 0) {
6110 nfs_confirm_seqid(&lsp->ls_seqid, 0);
6111 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
6112 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
6113 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
6114 rpc_restart_call_prepare(task);
6116 case -NFS4ERR_BAD_STATEID:
6117 case -NFS4ERR_OLD_STATEID:
6118 case -NFS4ERR_STALE_STATEID:
6119 case -NFS4ERR_EXPIRED:
6120 if (data->arg.new_lock_owner != 0) {
6121 if (!nfs4_stateid_match(&data->arg.open_stateid,
6122 &lsp->ls_state->open_stateid))
6123 rpc_restart_call_prepare(task);
6124 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
6126 rpc_restart_call_prepare(task);
6128 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
6131 static void nfs4_lock_release(void *calldata)
6133 struct nfs4_lockdata *data = calldata;
6135 dprintk("%s: begin!\n", __func__);
6136 nfs_free_seqid(data->arg.open_seqid);
6137 if (data->cancelled != 0) {
6138 struct rpc_task *task;
6139 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
6140 data->arg.lock_seqid);
6142 rpc_put_task_async(task);
6143 dprintk("%s: cancelling lock!\n", __func__);
6145 nfs_free_seqid(data->arg.lock_seqid);
6146 nfs4_put_lock_state(data->lsp);
6147 put_nfs_open_context(data->ctx);
6149 dprintk("%s: done!\n", __func__);
6152 static const struct rpc_call_ops nfs4_lock_ops = {
6153 .rpc_call_prepare = nfs4_lock_prepare,
6154 .rpc_call_done = nfs4_lock_done,
6155 .rpc_release = nfs4_lock_release,
6158 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
6161 case -NFS4ERR_ADMIN_REVOKED:
6162 case -NFS4ERR_EXPIRED:
6163 case -NFS4ERR_BAD_STATEID:
6164 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
6165 if (new_lock_owner != 0 ||
6166 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
6167 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
6169 case -NFS4ERR_STALE_STATEID:
6170 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
6171 nfs4_schedule_lease_recovery(server->nfs_client);
6175 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
6177 struct nfs4_lockdata *data;
6178 struct rpc_task *task;
6179 struct rpc_message msg = {
6180 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
6181 .rpc_cred = state->owner->so_cred,
6183 struct rpc_task_setup task_setup_data = {
6184 .rpc_client = NFS_CLIENT(state->inode),
6185 .rpc_message = &msg,
6186 .callback_ops = &nfs4_lock_ops,
6187 .workqueue = nfsiod_workqueue,
6188 .flags = RPC_TASK_ASYNC,
6192 dprintk("%s: begin!\n", __func__);
6193 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
6194 fl->fl_u.nfs4_fl.owner,
6195 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
6199 data->arg.block = 1;
6200 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
6201 msg.rpc_argp = &data->arg;
6202 msg.rpc_resp = &data->res;
6203 task_setup_data.callback_data = data;
6204 if (recovery_type > NFS_LOCK_NEW) {
6205 if (recovery_type == NFS_LOCK_RECLAIM)
6206 data->arg.reclaim = NFS_LOCK_RECLAIM;
6207 nfs4_set_sequence_privileged(&data->arg.seq_args);
6209 data->arg.new_lock = 1;
6210 task = rpc_run_task(&task_setup_data);
6212 return PTR_ERR(task);
6213 ret = rpc_wait_for_completion_task(task);
6215 ret = data->rpc_status;
6217 nfs4_handle_setlk_error(data->server, data->lsp,
6218 data->arg.new_lock_owner, ret);
6220 data->cancelled = 1;
6222 dprintk("%s: done, ret = %d!\n", __func__, ret);
6223 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
6227 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
6229 struct nfs_server *server = NFS_SERVER(state->inode);
6230 struct nfs4_exception exception = {
6231 .inode = state->inode,
6236 /* Cache the lock if possible... */
6237 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6239 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
6240 if (err != -NFS4ERR_DELAY)
6242 nfs4_handle_exception(server, err, &exception);
6243 } while (exception.retry);
6247 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
6249 struct nfs_server *server = NFS_SERVER(state->inode);
6250 struct nfs4_exception exception = {
6251 .inode = state->inode,
6255 err = nfs4_set_lock_state(state, request);
6258 if (!recover_lost_locks) {
6259 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
6263 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6265 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
6269 case -NFS4ERR_GRACE:
6270 case -NFS4ERR_DELAY:
6271 nfs4_handle_exception(server, err, &exception);
6274 } while (exception.retry);
6279 #if defined(CONFIG_NFS_V4_1)
6280 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6282 struct nfs4_lock_state *lsp;
6285 status = nfs4_set_lock_state(state, request);
6288 lsp = request->fl_u.nfs4_fl.owner;
6289 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) ||
6290 test_bit(NFS_LOCK_LOST, &lsp->ls_flags))
6292 return nfs4_lock_expired(state, request);
6296 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6298 struct nfs_inode *nfsi = NFS_I(state->inode);
6299 struct nfs4_state_owner *sp = state->owner;
6300 unsigned char fl_flags = request->fl_flags;
6303 request->fl_flags |= FL_ACCESS;
6304 status = locks_lock_inode_wait(state->inode, request);
6307 mutex_lock(&sp->so_delegreturn_mutex);
6308 down_read(&nfsi->rwsem);
6309 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
6310 /* Yes: cache locks! */
6311 /* ...but avoid races with delegation recall... */
6312 request->fl_flags = fl_flags & ~FL_SLEEP;
6313 status = locks_lock_inode_wait(state->inode, request);
6314 up_read(&nfsi->rwsem);
6315 mutex_unlock(&sp->so_delegreturn_mutex);
6318 up_read(&nfsi->rwsem);
6319 mutex_unlock(&sp->so_delegreturn_mutex);
6320 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6322 request->fl_flags = fl_flags;
6326 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6328 struct nfs4_exception exception = {
6330 .inode = state->inode,
6335 err = _nfs4_proc_setlk(state, cmd, request);
6336 if (err == -NFS4ERR_DENIED)
6338 err = nfs4_handle_exception(NFS_SERVER(state->inode),
6340 } while (exception.retry);
6344 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
6345 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
6348 nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd,
6349 struct file_lock *request)
6351 int status = -ERESTARTSYS;
6352 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6354 while(!signalled()) {
6355 status = nfs4_proc_setlk(state, cmd, request);
6356 if ((status != -EAGAIN) || IS_SETLK(cmd))
6358 freezable_schedule_timeout_interruptible(timeout);
6360 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout);
6361 status = -ERESTARTSYS;
6366 #ifdef CONFIG_NFS_V4_1
6367 struct nfs4_lock_waiter {
6368 struct task_struct *task;
6369 struct inode *inode;
6370 struct nfs_lowner *owner;
6375 nfs4_wake_lock_waiter(wait_queue_t *wait, unsigned int mode, int flags, void *key)
6378 struct cb_notify_lock_args *cbnl = key;
6379 struct nfs4_lock_waiter *waiter = wait->private;
6380 struct nfs_lowner *lowner = &cbnl->cbnl_owner,
6381 *wowner = waiter->owner;
6383 /* Only wake if the callback was for the same owner */
6384 if (lowner->clientid != wowner->clientid ||
6385 lowner->id != wowner->id ||
6386 lowner->s_dev != wowner->s_dev)
6389 /* Make sure it's for the right inode */
6390 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh))
6393 waiter->notified = true;
6395 /* override "private" so we can use default_wake_function */
6396 wait->private = waiter->task;
6397 ret = autoremove_wake_function(wait, mode, flags, key);
6398 wait->private = waiter;
6403 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6405 int status = -ERESTARTSYS;
6406 unsigned long flags;
6407 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner;
6408 struct nfs_server *server = NFS_SERVER(state->inode);
6409 struct nfs_client *clp = server->nfs_client;
6410 wait_queue_head_t *q = &clp->cl_lock_waitq;
6411 struct nfs_lowner owner = { .clientid = clp->cl_clientid,
6412 .id = lsp->ls_seqid.owner_id,
6413 .s_dev = server->s_dev };
6414 struct nfs4_lock_waiter waiter = { .task = current,
6415 .inode = state->inode,
6417 .notified = false };
6420 /* Don't bother with waitqueue if we don't expect a callback */
6421 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags))
6422 return nfs4_retry_setlk_simple(state, cmd, request);
6425 wait.private = &waiter;
6426 wait.func = nfs4_wake_lock_waiter;
6427 add_wait_queue(q, &wait);
6429 while(!signalled()) {
6430 status = nfs4_proc_setlk(state, cmd, request);
6431 if ((status != -EAGAIN) || IS_SETLK(cmd))
6434 status = -ERESTARTSYS;
6435 spin_lock_irqsave(&q->lock, flags);
6436 if (waiter.notified) {
6437 spin_unlock_irqrestore(&q->lock, flags);
6440 set_current_state(TASK_INTERRUPTIBLE);
6441 spin_unlock_irqrestore(&q->lock, flags);
6443 freezable_schedule_timeout_interruptible(NFS4_LOCK_MAXTIMEOUT);
6446 finish_wait(q, &wait);
6449 #else /* !CONFIG_NFS_V4_1 */
6451 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6453 return nfs4_retry_setlk_simple(state, cmd, request);
6458 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6460 struct nfs_open_context *ctx;
6461 struct nfs4_state *state;
6464 /* verify open state */
6465 ctx = nfs_file_open_context(filp);
6468 if (IS_GETLK(cmd)) {
6470 return nfs4_proc_getlk(state, F_GETLK, request);
6474 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6477 if (request->fl_type == F_UNLCK) {
6479 return nfs4_proc_unlck(state, cmd, request);
6486 if ((request->fl_flags & FL_POSIX) &&
6487 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6490 status = nfs4_set_lock_state(state, request);
6494 return nfs4_retry_setlk(state, cmd, request);
6497 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
6499 struct nfs_server *server = NFS_SERVER(state->inode);
6502 err = nfs4_set_lock_state(state, fl);
6505 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
6506 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
6509 struct nfs_release_lockowner_data {
6510 struct nfs4_lock_state *lsp;
6511 struct nfs_server *server;
6512 struct nfs_release_lockowner_args args;
6513 struct nfs_release_lockowner_res res;
6514 unsigned long timestamp;
6517 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6519 struct nfs_release_lockowner_data *data = calldata;
6520 struct nfs_server *server = data->server;
6521 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
6522 &data->res.seq_res, task);
6523 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6524 data->timestamp = jiffies;
6527 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6529 struct nfs_release_lockowner_data *data = calldata;
6530 struct nfs_server *server = data->server;
6532 nfs40_sequence_done(task, &data->res.seq_res);
6534 switch (task->tk_status) {
6536 renew_lease(server, data->timestamp);
6538 case -NFS4ERR_STALE_CLIENTID:
6539 case -NFS4ERR_EXPIRED:
6540 nfs4_schedule_lease_recovery(server->nfs_client);
6542 case -NFS4ERR_LEASE_MOVED:
6543 case -NFS4ERR_DELAY:
6544 if (nfs4_async_handle_error(task, server,
6545 NULL, NULL) == -EAGAIN)
6546 rpc_restart_call_prepare(task);
6550 static void nfs4_release_lockowner_release(void *calldata)
6552 struct nfs_release_lockowner_data *data = calldata;
6553 nfs4_free_lock_state(data->server, data->lsp);
6557 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
6558 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6559 .rpc_call_done = nfs4_release_lockowner_done,
6560 .rpc_release = nfs4_release_lockowner_release,
6564 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
6566 struct nfs_release_lockowner_data *data;
6567 struct rpc_message msg = {
6568 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6571 if (server->nfs_client->cl_mvops->minor_version != 0)
6574 data = kmalloc(sizeof(*data), GFP_NOFS);
6578 data->server = server;
6579 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6580 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6581 data->args.lock_owner.s_dev = server->s_dev;
6583 msg.rpc_argp = &data->args;
6584 msg.rpc_resp = &data->res;
6585 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
6586 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
6589 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6591 static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
6592 struct dentry *unused, struct inode *inode,
6593 const char *key, const void *buf,
6594 size_t buflen, int flags)
6596 return nfs4_proc_set_acl(inode, buf, buflen);
6599 static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
6600 struct dentry *unused, struct inode *inode,
6601 const char *key, void *buf, size_t buflen)
6603 return nfs4_proc_get_acl(inode, buf, buflen);
6606 static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
6608 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
6611 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
6613 static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
6614 struct dentry *unused, struct inode *inode,
6615 const char *key, const void *buf,
6616 size_t buflen, int flags)
6618 if (security_ismaclabel(key))
6619 return nfs4_set_security_label(inode, buf, buflen);
6624 static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
6625 struct dentry *unused, struct inode *inode,
6626 const char *key, void *buf, size_t buflen)
6628 if (security_ismaclabel(key))
6629 return nfs4_get_security_label(inode, buf, buflen);
6634 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6638 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
6639 len = security_inode_listsecurity(inode, list, list_len);
6640 if (list_len && len > list_len)
6646 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6647 .prefix = XATTR_SECURITY_PREFIX,
6648 .get = nfs4_xattr_get_nfs4_label,
6649 .set = nfs4_xattr_set_nfs4_label,
6655 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6663 * nfs_fhget will use either the mounted_on_fileid or the fileid
6665 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6667 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6668 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6669 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
6670 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
6673 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
6674 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
6675 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6679 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6680 const struct qstr *name,
6681 struct nfs4_fs_locations *fs_locations,
6684 struct nfs_server *server = NFS_SERVER(dir);
6686 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6688 struct nfs4_fs_locations_arg args = {
6689 .dir_fh = NFS_FH(dir),
6694 struct nfs4_fs_locations_res res = {
6695 .fs_locations = fs_locations,
6697 struct rpc_message msg = {
6698 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6704 dprintk("%s: start\n", __func__);
6706 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6707 * is not supported */
6708 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6709 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6711 bitmask[0] |= FATTR4_WORD0_FILEID;
6713 nfs_fattr_init(&fs_locations->fattr);
6714 fs_locations->server = server;
6715 fs_locations->nlocations = 0;
6716 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
6717 dprintk("%s: returned status = %d\n", __func__, status);
6721 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6722 const struct qstr *name,
6723 struct nfs4_fs_locations *fs_locations,
6726 struct nfs4_exception exception = { };
6729 err = _nfs4_proc_fs_locations(client, dir, name,
6730 fs_locations, page);
6731 trace_nfs4_get_fs_locations(dir, name, err);
6732 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6734 } while (exception.retry);
6739 * This operation also signals the server that this client is
6740 * performing migration recovery. The server can stop returning
6741 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6742 * appended to this compound to identify the client ID which is
6743 * performing recovery.
6745 static int _nfs40_proc_get_locations(struct inode *inode,
6746 struct nfs4_fs_locations *locations,
6747 struct page *page, struct rpc_cred *cred)
6749 struct nfs_server *server = NFS_SERVER(inode);
6750 struct rpc_clnt *clnt = server->client;
6752 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6754 struct nfs4_fs_locations_arg args = {
6755 .clientid = server->nfs_client->cl_clientid,
6756 .fh = NFS_FH(inode),
6759 .migration = 1, /* skip LOOKUP */
6760 .renew = 1, /* append RENEW */
6762 struct nfs4_fs_locations_res res = {
6763 .fs_locations = locations,
6767 struct rpc_message msg = {
6768 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6773 unsigned long now = jiffies;
6776 nfs_fattr_init(&locations->fattr);
6777 locations->server = server;
6778 locations->nlocations = 0;
6780 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6781 nfs4_set_sequence_privileged(&args.seq_args);
6782 status = nfs4_call_sync_sequence(clnt, server, &msg,
6783 &args.seq_args, &res.seq_res);
6787 renew_lease(server, now);
6791 #ifdef CONFIG_NFS_V4_1
6794 * This operation also signals the server that this client is
6795 * performing migration recovery. The server can stop asserting
6796 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6797 * performing this operation is identified in the SEQUENCE
6798 * operation in this compound.
6800 * When the client supports GETATTR(fs_locations_info), it can
6801 * be plumbed in here.
6803 static int _nfs41_proc_get_locations(struct inode *inode,
6804 struct nfs4_fs_locations *locations,
6805 struct page *page, struct rpc_cred *cred)
6807 struct nfs_server *server = NFS_SERVER(inode);
6808 struct rpc_clnt *clnt = server->client;
6810 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6812 struct nfs4_fs_locations_arg args = {
6813 .fh = NFS_FH(inode),
6816 .migration = 1, /* skip LOOKUP */
6818 struct nfs4_fs_locations_res res = {
6819 .fs_locations = locations,
6822 struct rpc_message msg = {
6823 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6830 nfs_fattr_init(&locations->fattr);
6831 locations->server = server;
6832 locations->nlocations = 0;
6834 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6835 nfs4_set_sequence_privileged(&args.seq_args);
6836 status = nfs4_call_sync_sequence(clnt, server, &msg,
6837 &args.seq_args, &res.seq_res);
6838 if (status == NFS4_OK &&
6839 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6840 status = -NFS4ERR_LEASE_MOVED;
6844 #endif /* CONFIG_NFS_V4_1 */
6847 * nfs4_proc_get_locations - discover locations for a migrated FSID
6848 * @inode: inode on FSID that is migrating
6849 * @locations: result of query
6851 * @cred: credential to use for this operation
6853 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6854 * operation failed, or a negative errno if a local error occurred.
6856 * On success, "locations" is filled in, but if the server has
6857 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6860 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6861 * from this client that require migration recovery.
6863 int nfs4_proc_get_locations(struct inode *inode,
6864 struct nfs4_fs_locations *locations,
6865 struct page *page, struct rpc_cred *cred)
6867 struct nfs_server *server = NFS_SERVER(inode);
6868 struct nfs_client *clp = server->nfs_client;
6869 const struct nfs4_mig_recovery_ops *ops =
6870 clp->cl_mvops->mig_recovery_ops;
6871 struct nfs4_exception exception = { };
6874 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6875 (unsigned long long)server->fsid.major,
6876 (unsigned long long)server->fsid.minor,
6878 nfs_display_fhandle(NFS_FH(inode), __func__);
6881 status = ops->get_locations(inode, locations, page, cred);
6882 if (status != -NFS4ERR_DELAY)
6884 nfs4_handle_exception(server, status, &exception);
6885 } while (exception.retry);
6890 * This operation also signals the server that this client is
6891 * performing "lease moved" recovery. The server can stop
6892 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6893 * is appended to this compound to identify the client ID which is
6894 * performing recovery.
6896 static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6898 struct nfs_server *server = NFS_SERVER(inode);
6899 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6900 struct rpc_clnt *clnt = server->client;
6901 struct nfs4_fsid_present_arg args = {
6902 .fh = NFS_FH(inode),
6903 .clientid = clp->cl_clientid,
6904 .renew = 1, /* append RENEW */
6906 struct nfs4_fsid_present_res res = {
6909 struct rpc_message msg = {
6910 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6915 unsigned long now = jiffies;
6918 res.fh = nfs_alloc_fhandle();
6922 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6923 nfs4_set_sequence_privileged(&args.seq_args);
6924 status = nfs4_call_sync_sequence(clnt, server, &msg,
6925 &args.seq_args, &res.seq_res);
6926 nfs_free_fhandle(res.fh);
6930 do_renew_lease(clp, now);
6934 #ifdef CONFIG_NFS_V4_1
6937 * This operation also signals the server that this client is
6938 * performing "lease moved" recovery. The server can stop asserting
6939 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6940 * this operation is identified in the SEQUENCE operation in this
6943 static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6945 struct nfs_server *server = NFS_SERVER(inode);
6946 struct rpc_clnt *clnt = server->client;
6947 struct nfs4_fsid_present_arg args = {
6948 .fh = NFS_FH(inode),
6950 struct nfs4_fsid_present_res res = {
6952 struct rpc_message msg = {
6953 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6960 res.fh = nfs_alloc_fhandle();
6964 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6965 nfs4_set_sequence_privileged(&args.seq_args);
6966 status = nfs4_call_sync_sequence(clnt, server, &msg,
6967 &args.seq_args, &res.seq_res);
6968 nfs_free_fhandle(res.fh);
6969 if (status == NFS4_OK &&
6970 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6971 status = -NFS4ERR_LEASE_MOVED;
6975 #endif /* CONFIG_NFS_V4_1 */
6978 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6979 * @inode: inode on FSID to check
6980 * @cred: credential to use for this operation
6982 * Server indicates whether the FSID is present, moved, or not
6983 * recognized. This operation is necessary to clear a LEASE_MOVED
6984 * condition for this client ID.
6986 * Returns NFS4_OK if the FSID is present on this server,
6987 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6988 * NFS4ERR code if some error occurred on the server, or a
6989 * negative errno if a local failure occurred.
6991 int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6993 struct nfs_server *server = NFS_SERVER(inode);
6994 struct nfs_client *clp = server->nfs_client;
6995 const struct nfs4_mig_recovery_ops *ops =
6996 clp->cl_mvops->mig_recovery_ops;
6997 struct nfs4_exception exception = { };
7000 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
7001 (unsigned long long)server->fsid.major,
7002 (unsigned long long)server->fsid.minor,
7004 nfs_display_fhandle(NFS_FH(inode), __func__);
7007 status = ops->fsid_present(inode, cred);
7008 if (status != -NFS4ERR_DELAY)
7010 nfs4_handle_exception(server, status, &exception);
7011 } while (exception.retry);
7016 * If 'use_integrity' is true and the state managment nfs_client
7017 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
7018 * and the machine credential as per RFC3530bis and RFC5661 Security
7019 * Considerations sections. Otherwise, just use the user cred with the
7020 * filesystem's rpc_client.
7022 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
7025 struct nfs4_secinfo_arg args = {
7026 .dir_fh = NFS_FH(dir),
7029 struct nfs4_secinfo_res res = {
7032 struct rpc_message msg = {
7033 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
7037 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7038 struct rpc_cred *cred = NULL;
7040 if (use_integrity) {
7041 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7042 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
7043 msg.rpc_cred = cred;
7046 dprintk("NFS call secinfo %s\n", name->name);
7048 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
7049 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
7051 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
7053 dprintk("NFS reply secinfo: %d\n", status);
7061 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
7062 struct nfs4_secinfo_flavors *flavors)
7064 struct nfs4_exception exception = { };
7067 err = -NFS4ERR_WRONGSEC;
7069 /* try to use integrity protection with machine cred */
7070 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
7071 err = _nfs4_proc_secinfo(dir, name, flavors, true);
7074 * if unable to use integrity protection, or SECINFO with
7075 * integrity protection returns NFS4ERR_WRONGSEC (which is
7076 * disallowed by spec, but exists in deployed servers) use
7077 * the current filesystem's rpc_client and the user cred.
7079 if (err == -NFS4ERR_WRONGSEC)
7080 err = _nfs4_proc_secinfo(dir, name, flavors, false);
7082 trace_nfs4_secinfo(dir, name, err);
7083 err = nfs4_handle_exception(NFS_SERVER(dir), err,
7085 } while (exception.retry);
7089 #ifdef CONFIG_NFS_V4_1
7091 * Check the exchange flags returned by the server for invalid flags, having
7092 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
7095 static int nfs4_check_cl_exchange_flags(u32 flags)
7097 if (flags & ~EXCHGID4_FLAG_MASK_R)
7099 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
7100 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
7102 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
7106 return -NFS4ERR_INVAL;
7110 nfs41_same_server_scope(struct nfs41_server_scope *a,
7111 struct nfs41_server_scope *b)
7113 if (a->server_scope_sz != b->server_scope_sz)
7115 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0;
7119 nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
7123 static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
7124 .rpc_call_done = &nfs4_bind_one_conn_to_session_done,
7128 * nfs4_proc_bind_one_conn_to_session()
7130 * The 4.1 client currently uses the same TCP connection for the
7131 * fore and backchannel.
7134 int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
7135 struct rpc_xprt *xprt,
7136 struct nfs_client *clp,
7137 struct rpc_cred *cred)
7140 struct nfs41_bind_conn_to_session_args args = {
7142 .dir = NFS4_CDFC4_FORE_OR_BOTH,
7144 struct nfs41_bind_conn_to_session_res res;
7145 struct rpc_message msg = {
7147 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
7152 struct rpc_task_setup task_setup_data = {
7155 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
7156 .rpc_message = &msg,
7157 .flags = RPC_TASK_TIMEOUT,
7159 struct rpc_task *task;
7161 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
7162 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
7163 args.dir = NFS4_CDFC4_FORE;
7165 /* Do not set the backchannel flag unless this is clnt->cl_xprt */
7166 if (xprt != rcu_access_pointer(clnt->cl_xprt))
7167 args.dir = NFS4_CDFC4_FORE;
7169 task = rpc_run_task(&task_setup_data);
7170 if (!IS_ERR(task)) {
7171 status = task->tk_status;
7174 status = PTR_ERR(task);
7175 trace_nfs4_bind_conn_to_session(clp, status);
7177 if (memcmp(res.sessionid.data,
7178 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
7179 dprintk("NFS: %s: Session ID mismatch\n", __func__);
7182 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7183 dprintk("NFS: %s: Unexpected direction from server\n",
7187 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7188 dprintk("NFS: %s: Server returned RDMA mode = true\n",
7197 struct rpc_bind_conn_calldata {
7198 struct nfs_client *clp;
7199 struct rpc_cred *cred;
7203 nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
7204 struct rpc_xprt *xprt,
7207 struct rpc_bind_conn_calldata *p = calldata;
7209 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
7212 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7214 struct rpc_bind_conn_calldata data = {
7218 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
7219 nfs4_proc_bind_conn_to_session_callback, &data);
7223 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
7224 * and operations we'd like to see to enable certain features in the allow map
7226 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
7227 .how = SP4_MACH_CRED,
7228 .enforce.u.words = {
7229 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7230 1 << (OP_EXCHANGE_ID - 32) |
7231 1 << (OP_CREATE_SESSION - 32) |
7232 1 << (OP_DESTROY_SESSION - 32) |
7233 1 << (OP_DESTROY_CLIENTID - 32)
7236 [0] = 1 << (OP_CLOSE) |
7237 1 << (OP_OPEN_DOWNGRADE) |
7239 1 << (OP_DELEGRETURN) |
7241 [1] = 1 << (OP_SECINFO - 32) |
7242 1 << (OP_SECINFO_NO_NAME - 32) |
7243 1 << (OP_LAYOUTRETURN - 32) |
7244 1 << (OP_TEST_STATEID - 32) |
7245 1 << (OP_FREE_STATEID - 32) |
7246 1 << (OP_WRITE - 32)
7251 * Select the state protection mode for client `clp' given the server results
7252 * from exchange_id in `sp'.
7254 * Returns 0 on success, negative errno otherwise.
7256 static int nfs4_sp4_select_mode(struct nfs_client *clp,
7257 struct nfs41_state_protection *sp)
7259 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
7260 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7261 1 << (OP_EXCHANGE_ID - 32) |
7262 1 << (OP_CREATE_SESSION - 32) |
7263 1 << (OP_DESTROY_SESSION - 32) |
7264 1 << (OP_DESTROY_CLIENTID - 32)
7268 if (sp->how == SP4_MACH_CRED) {
7269 /* Print state protect result */
7270 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
7271 for (i = 0; i <= LAST_NFS4_OP; i++) {
7272 if (test_bit(i, sp->enforce.u.longs))
7273 dfprintk(MOUNT, " enforce op %d\n", i);
7274 if (test_bit(i, sp->allow.u.longs))
7275 dfprintk(MOUNT, " allow op %d\n", i);
7278 /* make sure nothing is on enforce list that isn't supported */
7279 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
7280 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
7281 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7287 * Minimal mode - state operations are allowed to use machine
7288 * credential. Note this already happens by default, so the
7289 * client doesn't have to do anything more than the negotiation.
7291 * NOTE: we don't care if EXCHANGE_ID is in the list -
7292 * we're already using the machine cred for exchange_id
7293 * and will never use a different cred.
7295 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
7296 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
7297 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
7298 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
7299 dfprintk(MOUNT, "sp4_mach_cred:\n");
7300 dfprintk(MOUNT, " minimal mode enabled\n");
7301 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
7303 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7307 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
7308 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
7309 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
7310 test_bit(OP_LOCKU, sp->allow.u.longs)) {
7311 dfprintk(MOUNT, " cleanup mode enabled\n");
7312 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
7315 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
7316 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
7317 set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP,
7318 &clp->cl_sp4_flags);
7321 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
7322 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
7323 dfprintk(MOUNT, " secinfo mode enabled\n");
7324 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
7327 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
7328 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
7329 dfprintk(MOUNT, " stateid mode enabled\n");
7330 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
7333 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
7334 dfprintk(MOUNT, " write mode enabled\n");
7335 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
7338 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
7339 dfprintk(MOUNT, " commit mode enabled\n");
7340 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
7347 struct nfs41_exchange_id_data {
7348 struct nfs41_exchange_id_res res;
7349 struct nfs41_exchange_id_args args;
7350 struct rpc_xprt *xprt;
7354 static void nfs4_exchange_id_done(struct rpc_task *task, void *data)
7356 struct nfs41_exchange_id_data *cdata =
7357 (struct nfs41_exchange_id_data *)data;
7358 struct nfs_client *clp = cdata->args.client;
7359 int status = task->tk_status;
7361 trace_nfs4_exchange_id(clp, status);
7364 status = nfs4_check_cl_exchange_flags(cdata->res.flags);
7366 if (cdata->xprt && status == 0) {
7367 status = nfs4_detect_session_trunking(clp, &cdata->res,
7373 status = nfs4_sp4_select_mode(clp, &cdata->res.state_protect);
7376 clp->cl_clientid = cdata->res.clientid;
7377 clp->cl_exchange_flags = cdata->res.flags;
7378 /* Client ID is not confirmed */
7379 if (!(cdata->res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
7380 clear_bit(NFS4_SESSION_ESTABLISHED,
7381 &clp->cl_session->session_state);
7382 clp->cl_seqid = cdata->res.seqid;
7385 kfree(clp->cl_serverowner);
7386 clp->cl_serverowner = cdata->res.server_owner;
7387 cdata->res.server_owner = NULL;
7389 /* use the most recent implementation id */
7390 kfree(clp->cl_implid);
7391 clp->cl_implid = cdata->res.impl_id;
7392 cdata->res.impl_id = NULL;
7394 if (clp->cl_serverscope != NULL &&
7395 !nfs41_same_server_scope(clp->cl_serverscope,
7396 cdata->res.server_scope)) {
7397 dprintk("%s: server_scope mismatch detected\n",
7399 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
7400 kfree(clp->cl_serverscope);
7401 clp->cl_serverscope = NULL;
7404 if (clp->cl_serverscope == NULL) {
7405 clp->cl_serverscope = cdata->res.server_scope;
7406 cdata->res.server_scope = NULL;
7408 /* Save the EXCHANGE_ID verifier session trunk tests */
7409 memcpy(clp->cl_confirm.data, cdata->args.verifier->data,
7410 sizeof(clp->cl_confirm.data));
7413 cdata->rpc_status = status;
7417 static void nfs4_exchange_id_release(void *data)
7419 struct nfs41_exchange_id_data *cdata =
7420 (struct nfs41_exchange_id_data *)data;
7423 xprt_put(cdata->xprt);
7424 rpc_clnt_xprt_switch_put(cdata->args.client->cl_rpcclient);
7426 nfs_put_client(cdata->args.client);
7427 kfree(cdata->res.impl_id);
7428 kfree(cdata->res.server_scope);
7429 kfree(cdata->res.server_owner);
7433 static const struct rpc_call_ops nfs4_exchange_id_call_ops = {
7434 .rpc_call_done = nfs4_exchange_id_done,
7435 .rpc_release = nfs4_exchange_id_release,
7439 * _nfs4_proc_exchange_id()
7441 * Wrapper for EXCHANGE_ID operation.
7443 static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
7444 u32 sp4_how, struct rpc_xprt *xprt)
7446 nfs4_verifier verifier;
7447 struct rpc_message msg = {
7448 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
7451 struct rpc_task_setup task_setup_data = {
7452 .rpc_client = clp->cl_rpcclient,
7453 .callback_ops = &nfs4_exchange_id_call_ops,
7454 .rpc_message = &msg,
7455 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
7457 struct nfs41_exchange_id_data *calldata;
7458 struct rpc_task *task;
7461 if (!atomic_inc_not_zero(&clp->cl_count))
7464 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7466 nfs_put_client(clp);
7471 nfs4_init_boot_verifier(clp, &verifier);
7473 status = nfs4_init_uniform_client_string(clp);
7477 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
7480 if (unlikely(calldata->res.server_owner == NULL))
7483 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
7485 if (unlikely(calldata->res.server_scope == NULL))
7486 goto out_server_owner;
7488 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
7489 if (unlikely(calldata->res.impl_id == NULL))
7490 goto out_server_scope;
7494 calldata->args.state_protect.how = SP4_NONE;
7498 calldata->args.state_protect = nfs4_sp4_mach_cred_request;
7508 calldata->xprt = xprt;
7509 task_setup_data.rpc_xprt = xprt;
7510 task_setup_data.flags =
7511 RPC_TASK_SOFT|RPC_TASK_SOFTCONN|RPC_TASK_ASYNC;
7512 calldata->args.verifier = &clp->cl_confirm;
7514 calldata->args.verifier = &verifier;
7516 calldata->args.client = clp;
7517 #ifdef CONFIG_NFS_V4_1_MIGRATION
7518 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7519 EXCHGID4_FLAG_BIND_PRINC_STATEID |
7520 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
7522 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7523 EXCHGID4_FLAG_BIND_PRINC_STATEID,
7525 msg.rpc_argp = &calldata->args;
7526 msg.rpc_resp = &calldata->res;
7527 task_setup_data.callback_data = calldata;
7529 task = rpc_run_task(&task_setup_data);
7531 return PTR_ERR(task);
7534 status = rpc_wait_for_completion_task(task);
7536 status = calldata->rpc_status;
7537 } else /* session trunking test */
7538 status = calldata->rpc_status;
7545 kfree(calldata->res.impl_id);
7547 kfree(calldata->res.server_scope);
7549 kfree(calldata->res.server_owner);
7552 nfs_put_client(clp);
7557 * nfs4_proc_exchange_id()
7559 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7561 * Since the clientid has expired, all compounds using sessions
7562 * associated with the stale clientid will be returning
7563 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7564 * be in some phase of session reset.
7566 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7568 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7570 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7573 /* try SP4_MACH_CRED if krb5i/p */
7574 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7575 authflavor == RPC_AUTH_GSS_KRB5P) {
7576 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED, NULL);
7582 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE, NULL);
7586 * nfs4_test_session_trunk
7588 * This is an add_xprt_test() test function called from
7589 * rpc_clnt_setup_test_and_add_xprt.
7591 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt
7592 * and is dereferrenced in nfs4_exchange_id_release
7594 * Upon success, add the new transport to the rpc_clnt
7596 * @clnt: struct rpc_clnt to get new transport
7597 * @xprt: the rpc_xprt to test
7598 * @data: call data for _nfs4_proc_exchange_id.
7600 int nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt,
7603 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data;
7606 dprintk("--> %s try %s\n", __func__,
7607 xprt->address_strings[RPC_DISPLAY_ADDR]);
7609 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED);
7611 /* Test connection for session trunking. Async exchange_id call */
7612 return _nfs4_proc_exchange_id(adata->clp, adata->cred, sp4_how, xprt);
7614 EXPORT_SYMBOL_GPL(nfs4_test_session_trunk);
7616 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7617 struct rpc_cred *cred)
7619 struct rpc_message msg = {
7620 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7626 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7627 trace_nfs4_destroy_clientid(clp, status);
7629 dprintk("NFS: Got error %d from the server %s on "
7630 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7634 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7635 struct rpc_cred *cred)
7640 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7641 ret = _nfs4_proc_destroy_clientid(clp, cred);
7643 case -NFS4ERR_DELAY:
7644 case -NFS4ERR_CLIENTID_BUSY:
7654 int nfs4_destroy_clientid(struct nfs_client *clp)
7656 struct rpc_cred *cred;
7659 if (clp->cl_mvops->minor_version < 1)
7661 if (clp->cl_exchange_flags == 0)
7663 if (clp->cl_preserve_clid)
7665 cred = nfs4_get_clid_cred(clp);
7666 ret = nfs4_proc_destroy_clientid(clp, cred);
7671 case -NFS4ERR_STALE_CLIENTID:
7672 clp->cl_exchange_flags = 0;
7678 struct nfs4_get_lease_time_data {
7679 struct nfs4_get_lease_time_args *args;
7680 struct nfs4_get_lease_time_res *res;
7681 struct nfs_client *clp;
7684 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7687 struct nfs4_get_lease_time_data *data =
7688 (struct nfs4_get_lease_time_data *)calldata;
7690 dprintk("--> %s\n", __func__);
7691 /* just setup sequence, do not trigger session recovery
7692 since we're invoked within one */
7693 nfs4_setup_sequence(data->clp,
7694 &data->args->la_seq_args,
7695 &data->res->lr_seq_res,
7697 dprintk("<-- %s\n", __func__);
7701 * Called from nfs4_state_manager thread for session setup, so don't recover
7702 * from sequence operation or clientid errors.
7704 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7706 struct nfs4_get_lease_time_data *data =
7707 (struct nfs4_get_lease_time_data *)calldata;
7709 dprintk("--> %s\n", __func__);
7710 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7712 switch (task->tk_status) {
7713 case -NFS4ERR_DELAY:
7714 case -NFS4ERR_GRACE:
7715 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7716 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7717 task->tk_status = 0;
7719 case -NFS4ERR_RETRY_UNCACHED_REP:
7720 rpc_restart_call_prepare(task);
7723 dprintk("<-- %s\n", __func__);
7726 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
7727 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7728 .rpc_call_done = nfs4_get_lease_time_done,
7731 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7733 struct rpc_task *task;
7734 struct nfs4_get_lease_time_args args;
7735 struct nfs4_get_lease_time_res res = {
7736 .lr_fsinfo = fsinfo,
7738 struct nfs4_get_lease_time_data data = {
7743 struct rpc_message msg = {
7744 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7748 struct rpc_task_setup task_setup = {
7749 .rpc_client = clp->cl_rpcclient,
7750 .rpc_message = &msg,
7751 .callback_ops = &nfs4_get_lease_time_ops,
7752 .callback_data = &data,
7753 .flags = RPC_TASK_TIMEOUT,
7757 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
7758 nfs4_set_sequence_privileged(&args.la_seq_args);
7759 task = rpc_run_task(&task_setup);
7762 return PTR_ERR(task);
7764 status = task->tk_status;
7770 * Initialize the values to be used by the client in CREATE_SESSION
7771 * If nfs4_init_session set the fore channel request and response sizes,
7774 * Set the back channel max_resp_sz_cached to zero to force the client to
7775 * always set csa_cachethis to FALSE because the current implementation
7776 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7778 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args,
7779 struct rpc_clnt *clnt)
7781 unsigned int max_rqst_sz, max_resp_sz;
7782 unsigned int max_bc_payload = rpc_max_bc_payload(clnt);
7784 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7785 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
7787 /* Fore channel attributes */
7788 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7789 args->fc_attrs.max_resp_sz = max_resp_sz;
7790 args->fc_attrs.max_ops = NFS4_MAX_OPS;
7791 args->fc_attrs.max_reqs = max_session_slots;
7793 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
7794 "max_ops=%u max_reqs=%u\n",
7796 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
7797 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
7799 /* Back channel attributes */
7800 args->bc_attrs.max_rqst_sz = max_bc_payload;
7801 args->bc_attrs.max_resp_sz = max_bc_payload;
7802 args->bc_attrs.max_resp_sz_cached = 0;
7803 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7804 args->bc_attrs.max_reqs = min_t(unsigned short, max_session_cb_slots, 1);
7806 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7807 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7809 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7810 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7811 args->bc_attrs.max_reqs);
7814 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7815 struct nfs41_create_session_res *res)
7817 struct nfs4_channel_attrs *sent = &args->fc_attrs;
7818 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
7820 if (rcvd->max_resp_sz > sent->max_resp_sz)
7823 * Our requested max_ops is the minimum we need; we're not
7824 * prepared to break up compounds into smaller pieces than that.
7825 * So, no point even trying to continue if the server won't
7828 if (rcvd->max_ops < sent->max_ops)
7830 if (rcvd->max_reqs == 0)
7832 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7833 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
7837 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7838 struct nfs41_create_session_res *res)
7840 struct nfs4_channel_attrs *sent = &args->bc_attrs;
7841 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
7843 if (!(res->flags & SESSION4_BACK_CHAN))
7845 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7847 if (rcvd->max_resp_sz < sent->max_resp_sz)
7849 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7851 if (rcvd->max_ops > sent->max_ops)
7853 if (rcvd->max_reqs > sent->max_reqs)
7859 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7860 struct nfs41_create_session_res *res)
7864 ret = nfs4_verify_fore_channel_attrs(args, res);
7867 return nfs4_verify_back_channel_attrs(args, res);
7870 static void nfs4_update_session(struct nfs4_session *session,
7871 struct nfs41_create_session_res *res)
7873 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
7874 /* Mark client id and session as being confirmed */
7875 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7876 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
7877 session->flags = res->flags;
7878 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
7879 if (res->flags & SESSION4_BACK_CHAN)
7880 memcpy(&session->bc_attrs, &res->bc_attrs,
7881 sizeof(session->bc_attrs));
7884 static int _nfs4_proc_create_session(struct nfs_client *clp,
7885 struct rpc_cred *cred)
7887 struct nfs4_session *session = clp->cl_session;
7888 struct nfs41_create_session_args args = {
7890 .clientid = clp->cl_clientid,
7891 .seqid = clp->cl_seqid,
7892 .cb_program = NFS4_CALLBACK,
7894 struct nfs41_create_session_res res;
7896 struct rpc_message msg = {
7897 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7904 nfs4_init_channel_attrs(&args, clp->cl_rpcclient);
7905 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
7907 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7908 trace_nfs4_create_session(clp, status);
7911 case -NFS4ERR_STALE_CLIENTID:
7912 case -NFS4ERR_DELAY:
7921 /* Verify the session's negotiated channel_attrs values */
7922 status = nfs4_verify_channel_attrs(&args, &res);
7923 /* Increment the clientid slot sequence id */
7926 nfs4_update_session(session, &res);
7933 * Issues a CREATE_SESSION operation to the server.
7934 * It is the responsibility of the caller to verify the session is
7935 * expired before calling this routine.
7937 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
7941 struct nfs4_session *session = clp->cl_session;
7943 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7945 status = _nfs4_proc_create_session(clp, cred);
7949 /* Init or reset the session slot tables */
7950 status = nfs4_setup_session_slot_tables(session);
7951 dprintk("slot table setup returned %d\n", status);
7955 ptr = (unsigned *)&session->sess_id.data[0];
7956 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7957 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
7959 dprintk("<-- %s\n", __func__);
7964 * Issue the over-the-wire RPC DESTROY_SESSION.
7965 * The caller must serialize access to this routine.
7967 int nfs4_proc_destroy_session(struct nfs4_session *session,
7968 struct rpc_cred *cred)
7970 struct rpc_message msg = {
7971 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7972 .rpc_argp = session,
7977 dprintk("--> nfs4_proc_destroy_session\n");
7979 /* session is still being setup */
7980 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
7983 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7984 trace_nfs4_destroy_session(session->clp, status);
7987 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
7988 "Session has been destroyed regardless...\n", status);
7990 dprintk("<-- nfs4_proc_destroy_session\n");
7995 * Renew the cl_session lease.
7997 struct nfs4_sequence_data {
7998 struct nfs_client *clp;
7999 struct nfs4_sequence_args args;
8000 struct nfs4_sequence_res res;
8003 static void nfs41_sequence_release(void *data)
8005 struct nfs4_sequence_data *calldata = data;
8006 struct nfs_client *clp = calldata->clp;
8008 if (atomic_read(&clp->cl_count) > 1)
8009 nfs4_schedule_state_renewal(clp);
8010 nfs_put_client(clp);
8014 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8016 switch(task->tk_status) {
8017 case -NFS4ERR_DELAY:
8018 rpc_delay(task, NFS4_POLL_RETRY_MAX);
8021 nfs4_schedule_lease_recovery(clp);
8026 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
8028 struct nfs4_sequence_data *calldata = data;
8029 struct nfs_client *clp = calldata->clp;
8031 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
8034 trace_nfs4_sequence(clp, task->tk_status);
8035 if (task->tk_status < 0) {
8036 dprintk("%s ERROR %d\n", __func__, task->tk_status);
8037 if (atomic_read(&clp->cl_count) == 1)
8040 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
8041 rpc_restart_call_prepare(task);
8045 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
8047 dprintk("<-- %s\n", __func__);
8050 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
8052 struct nfs4_sequence_data *calldata = data;
8053 struct nfs_client *clp = calldata->clp;
8054 struct nfs4_sequence_args *args;
8055 struct nfs4_sequence_res *res;
8057 args = task->tk_msg.rpc_argp;
8058 res = task->tk_msg.rpc_resp;
8060 nfs4_setup_sequence(clp, args, res, task);
8063 static const struct rpc_call_ops nfs41_sequence_ops = {
8064 .rpc_call_done = nfs41_sequence_call_done,
8065 .rpc_call_prepare = nfs41_sequence_prepare,
8066 .rpc_release = nfs41_sequence_release,
8069 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
8070 struct rpc_cred *cred,
8073 struct nfs4_sequence_data *calldata;
8074 struct rpc_message msg = {
8075 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
8078 struct rpc_task_setup task_setup_data = {
8079 .rpc_client = clp->cl_rpcclient,
8080 .rpc_message = &msg,
8081 .callback_ops = &nfs41_sequence_ops,
8082 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
8085 if (!atomic_inc_not_zero(&clp->cl_count))
8086 return ERR_PTR(-EIO);
8087 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
8088 if (calldata == NULL) {
8089 nfs_put_client(clp);
8090 return ERR_PTR(-ENOMEM);
8092 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8094 nfs4_set_sequence_privileged(&calldata->args);
8095 msg.rpc_argp = &calldata->args;
8096 msg.rpc_resp = &calldata->res;
8097 calldata->clp = clp;
8098 task_setup_data.callback_data = calldata;
8100 return rpc_run_task(&task_setup_data);
8103 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
8105 struct rpc_task *task;
8108 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
8110 task = _nfs41_proc_sequence(clp, cred, false);
8112 ret = PTR_ERR(task);
8114 rpc_put_task_async(task);
8115 dprintk("<-- %s status=%d\n", __func__, ret);
8119 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
8121 struct rpc_task *task;
8124 task = _nfs41_proc_sequence(clp, cred, true);
8126 ret = PTR_ERR(task);
8129 ret = rpc_wait_for_completion_task(task);
8131 ret = task->tk_status;
8134 dprintk("<-- %s status=%d\n", __func__, ret);
8138 struct nfs4_reclaim_complete_data {
8139 struct nfs_client *clp;
8140 struct nfs41_reclaim_complete_args arg;
8141 struct nfs41_reclaim_complete_res res;
8144 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
8146 struct nfs4_reclaim_complete_data *calldata = data;
8148 nfs4_setup_sequence(calldata->clp,
8149 &calldata->arg.seq_args,
8150 &calldata->res.seq_res,
8154 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8156 switch(task->tk_status) {
8158 case -NFS4ERR_COMPLETE_ALREADY:
8159 case -NFS4ERR_WRONG_CRED: /* What to do here? */
8161 case -NFS4ERR_DELAY:
8162 rpc_delay(task, NFS4_POLL_RETRY_MAX);
8164 case -NFS4ERR_RETRY_UNCACHED_REP:
8166 case -NFS4ERR_BADSESSION:
8167 case -NFS4ERR_DEADSESSION:
8168 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
8169 nfs4_schedule_session_recovery(clp->cl_session,
8173 nfs4_schedule_lease_recovery(clp);
8178 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
8180 struct nfs4_reclaim_complete_data *calldata = data;
8181 struct nfs_client *clp = calldata->clp;
8182 struct nfs4_sequence_res *res = &calldata->res.seq_res;
8184 dprintk("--> %s\n", __func__);
8185 if (!nfs41_sequence_done(task, res))
8188 trace_nfs4_reclaim_complete(clp, task->tk_status);
8189 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
8190 rpc_restart_call_prepare(task);
8193 dprintk("<-- %s\n", __func__);
8196 static void nfs4_free_reclaim_complete_data(void *data)
8198 struct nfs4_reclaim_complete_data *calldata = data;
8203 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
8204 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
8205 .rpc_call_done = nfs4_reclaim_complete_done,
8206 .rpc_release = nfs4_free_reclaim_complete_data,
8210 * Issue a global reclaim complete.
8212 static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
8213 struct rpc_cred *cred)
8215 struct nfs4_reclaim_complete_data *calldata;
8216 struct rpc_task *task;
8217 struct rpc_message msg = {
8218 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
8221 struct rpc_task_setup task_setup_data = {
8222 .rpc_client = clp->cl_rpcclient,
8223 .rpc_message = &msg,
8224 .callback_ops = &nfs4_reclaim_complete_call_ops,
8225 .flags = RPC_TASK_ASYNC,
8227 int status = -ENOMEM;
8229 dprintk("--> %s\n", __func__);
8230 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
8231 if (calldata == NULL)
8233 calldata->clp = clp;
8234 calldata->arg.one_fs = 0;
8236 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8237 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
8238 msg.rpc_argp = &calldata->arg;
8239 msg.rpc_resp = &calldata->res;
8240 task_setup_data.callback_data = calldata;
8241 task = rpc_run_task(&task_setup_data);
8243 status = PTR_ERR(task);
8246 status = rpc_wait_for_completion_task(task);
8248 status = task->tk_status;
8251 dprintk("<-- %s status=%d\n", __func__, status);
8256 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
8258 struct nfs4_layoutget *lgp = calldata;
8259 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
8261 dprintk("--> %s\n", __func__);
8262 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args,
8263 &lgp->res.seq_res, task);
8264 dprintk("<-- %s\n", __func__);
8267 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
8269 struct nfs4_layoutget *lgp = calldata;
8271 dprintk("--> %s\n", __func__);
8272 nfs41_sequence_process(task, &lgp->res.seq_res);
8273 dprintk("<-- %s\n", __func__);
8277 nfs4_layoutget_handle_exception(struct rpc_task *task,
8278 struct nfs4_layoutget *lgp, struct nfs4_exception *exception)
8280 struct inode *inode = lgp->args.inode;
8281 struct nfs_server *server = NFS_SERVER(inode);
8282 struct pnfs_layout_hdr *lo;
8283 int nfs4err = task->tk_status;
8284 int err, status = 0;
8287 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
8294 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
8295 * on the file. set tk_status to -ENODATA to tell upper layer to
8298 case -NFS4ERR_LAYOUTUNAVAILABLE:
8302 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
8303 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
8305 case -NFS4ERR_BADLAYOUT:
8306 status = -EOVERFLOW;
8309 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
8310 * (or clients) writing to the same RAID stripe except when
8311 * the minlength argument is 0 (see RFC5661 section 18.43.3).
8313 * Treat it like we would RECALLCONFLICT -- we retry for a little
8314 * while, and then eventually give up.
8316 case -NFS4ERR_LAYOUTTRYLATER:
8317 if (lgp->args.minlength == 0) {
8318 status = -EOVERFLOW;
8323 case -NFS4ERR_RECALLCONFLICT:
8324 status = -ERECALLCONFLICT;
8326 case -NFS4ERR_DELEG_REVOKED:
8327 case -NFS4ERR_ADMIN_REVOKED:
8328 case -NFS4ERR_EXPIRED:
8329 case -NFS4ERR_BAD_STATEID:
8330 exception->timeout = 0;
8331 spin_lock(&inode->i_lock);
8332 lo = NFS_I(inode)->layout;
8333 /* If the open stateid was bad, then recover it. */
8334 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
8335 nfs4_stateid_match_other(&lgp->args.stateid,
8336 &lgp->args.ctx->state->stateid)) {
8337 spin_unlock(&inode->i_lock);
8338 exception->state = lgp->args.ctx->state;
8339 exception->stateid = &lgp->args.stateid;
8344 * Mark the bad layout state as invalid, then retry
8346 pnfs_mark_layout_stateid_invalid(lo, &head);
8347 spin_unlock(&inode->i_lock);
8348 nfs_commit_inode(inode, 0);
8349 pnfs_free_lseg_list(&head);
8354 nfs4_sequence_free_slot(&lgp->res.seq_res);
8355 err = nfs4_handle_exception(server, nfs4err, exception);
8357 if (exception->retry)
8363 dprintk("<-- %s\n", __func__);
8367 static size_t max_response_pages(struct nfs_server *server)
8369 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
8370 return nfs_page_array_len(0, max_resp_sz);
8373 static void nfs4_free_pages(struct page **pages, size_t size)
8380 for (i = 0; i < size; i++) {
8383 __free_page(pages[i]);
8388 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
8390 struct page **pages;
8393 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
8395 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
8399 for (i = 0; i < size; i++) {
8400 pages[i] = alloc_page(gfp_flags);
8402 dprintk("%s: failed to allocate page\n", __func__);
8403 nfs4_free_pages(pages, size);
8411 static void nfs4_layoutget_release(void *calldata)
8413 struct nfs4_layoutget *lgp = calldata;
8414 struct inode *inode = lgp->args.inode;
8415 struct nfs_server *server = NFS_SERVER(inode);
8416 size_t max_pages = max_response_pages(server);
8418 dprintk("--> %s\n", __func__);
8419 nfs4_free_pages(lgp->args.layout.pages, max_pages);
8420 pnfs_put_layout_hdr(NFS_I(inode)->layout);
8421 put_nfs_open_context(lgp->args.ctx);
8423 dprintk("<-- %s\n", __func__);
8426 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
8427 .rpc_call_prepare = nfs4_layoutget_prepare,
8428 .rpc_call_done = nfs4_layoutget_done,
8429 .rpc_release = nfs4_layoutget_release,
8432 struct pnfs_layout_segment *
8433 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags)
8435 struct inode *inode = lgp->args.inode;
8436 struct nfs_server *server = NFS_SERVER(inode);
8437 size_t max_pages = max_response_pages(server);
8438 struct rpc_task *task;
8439 struct rpc_message msg = {
8440 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
8441 .rpc_argp = &lgp->args,
8442 .rpc_resp = &lgp->res,
8443 .rpc_cred = lgp->cred,
8445 struct rpc_task_setup task_setup_data = {
8446 .rpc_client = server->client,
8447 .rpc_message = &msg,
8448 .callback_ops = &nfs4_layoutget_call_ops,
8449 .callback_data = lgp,
8450 .flags = RPC_TASK_ASYNC,
8452 struct pnfs_layout_segment *lseg = NULL;
8453 struct nfs4_exception exception = {
8455 .timeout = *timeout,
8459 dprintk("--> %s\n", __func__);
8461 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
8462 pnfs_get_layout_hdr(NFS_I(inode)->layout);
8464 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
8465 if (!lgp->args.layout.pages) {
8466 nfs4_layoutget_release(lgp);
8467 return ERR_PTR(-ENOMEM);
8469 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
8471 lgp->res.layoutp = &lgp->args.layout;
8472 lgp->res.seq_res.sr_slot = NULL;
8473 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
8475 task = rpc_run_task(&task_setup_data);
8477 return ERR_CAST(task);
8478 status = rpc_wait_for_completion_task(task);
8480 status = nfs4_layoutget_handle_exception(task, lgp, &exception);
8481 *timeout = exception.timeout;
8484 trace_nfs4_layoutget(lgp->args.ctx,
8490 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8491 if (status == 0 && lgp->res.layoutp->len)
8492 lseg = pnfs_layout_process(lgp);
8493 nfs4_sequence_free_slot(&lgp->res.seq_res);
8495 dprintk("<-- %s status=%d\n", __func__, status);
8497 return ERR_PTR(status);
8502 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8504 struct nfs4_layoutreturn *lrp = calldata;
8506 dprintk("--> %s\n", __func__);
8507 nfs4_setup_sequence(lrp->clp,
8508 &lrp->args.seq_args,
8513 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8515 struct nfs4_layoutreturn *lrp = calldata;
8516 struct nfs_server *server;
8518 dprintk("--> %s\n", __func__);
8520 if (!nfs41_sequence_process(task, &lrp->res.seq_res))
8523 server = NFS_SERVER(lrp->args.inode);
8524 switch (task->tk_status) {
8526 task->tk_status = 0;
8529 case -NFS4ERR_DELAY:
8530 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
8532 nfs4_sequence_free_slot(&lrp->res.seq_res);
8533 rpc_restart_call_prepare(task);
8536 dprintk("<-- %s\n", __func__);
8539 static void nfs4_layoutreturn_release(void *calldata)
8541 struct nfs4_layoutreturn *lrp = calldata;
8542 struct pnfs_layout_hdr *lo = lrp->args.layout;
8544 dprintk("--> %s\n", __func__);
8545 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range,
8546 lrp->res.lrs_present ? &lrp->res.stateid : NULL);
8547 nfs4_sequence_free_slot(&lrp->res.seq_res);
8548 if (lrp->ld_private.ops && lrp->ld_private.ops->free)
8549 lrp->ld_private.ops->free(&lrp->ld_private);
8550 pnfs_put_layout_hdr(lrp->args.layout);
8551 nfs_iput_and_deactive(lrp->inode);
8553 dprintk("<-- %s\n", __func__);
8556 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8557 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8558 .rpc_call_done = nfs4_layoutreturn_done,
8559 .rpc_release = nfs4_layoutreturn_release,
8562 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
8564 struct rpc_task *task;
8565 struct rpc_message msg = {
8566 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8567 .rpc_argp = &lrp->args,
8568 .rpc_resp = &lrp->res,
8569 .rpc_cred = lrp->cred,
8571 struct rpc_task_setup task_setup_data = {
8572 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
8573 .rpc_message = &msg,
8574 .callback_ops = &nfs4_layoutreturn_call_ops,
8575 .callback_data = lrp,
8579 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
8580 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
8581 &task_setup_data.rpc_client, &msg);
8583 dprintk("--> %s\n", __func__);
8585 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8587 nfs4_layoutreturn_release(lrp);
8590 task_setup_data.flags |= RPC_TASK_ASYNC;
8592 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
8593 task = rpc_run_task(&task_setup_data);
8595 return PTR_ERR(task);
8597 status = task->tk_status;
8598 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
8599 dprintk("<-- %s status=%d\n", __func__, status);
8605 _nfs4_proc_getdeviceinfo(struct nfs_server *server,
8606 struct pnfs_device *pdev,
8607 struct rpc_cred *cred)
8609 struct nfs4_getdeviceinfo_args args = {
8611 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8612 NOTIFY_DEVICEID4_DELETE,
8614 struct nfs4_getdeviceinfo_res res = {
8617 struct rpc_message msg = {
8618 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8625 dprintk("--> %s\n", __func__);
8626 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
8627 if (res.notification & ~args.notify_types)
8628 dprintk("%s: unsupported notification\n", __func__);
8629 if (res.notification != args.notify_types)
8632 dprintk("<-- %s status=%d\n", __func__, status);
8637 int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8638 struct pnfs_device *pdev,
8639 struct rpc_cred *cred)
8641 struct nfs4_exception exception = { };
8645 err = nfs4_handle_exception(server,
8646 _nfs4_proc_getdeviceinfo(server, pdev, cred),
8648 } while (exception.retry);
8651 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8653 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8655 struct nfs4_layoutcommit_data *data = calldata;
8656 struct nfs_server *server = NFS_SERVER(data->args.inode);
8658 nfs4_setup_sequence(server->nfs_client,
8659 &data->args.seq_args,
8665 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8667 struct nfs4_layoutcommit_data *data = calldata;
8668 struct nfs_server *server = NFS_SERVER(data->args.inode);
8670 if (!nfs41_sequence_done(task, &data->res.seq_res))
8673 switch (task->tk_status) { /* Just ignore these failures */
8674 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8675 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8676 case -NFS4ERR_BADLAYOUT: /* no layout */
8677 case -NFS4ERR_GRACE: /* loca_recalim always false */
8678 task->tk_status = 0;
8682 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
8683 rpc_restart_call_prepare(task);
8689 static void nfs4_layoutcommit_release(void *calldata)
8691 struct nfs4_layoutcommit_data *data = calldata;
8693 pnfs_cleanup_layoutcommit(data);
8694 nfs_post_op_update_inode_force_wcc(data->args.inode,
8696 put_rpccred(data->cred);
8697 nfs_iput_and_deactive(data->inode);
8701 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8702 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8703 .rpc_call_done = nfs4_layoutcommit_done,
8704 .rpc_release = nfs4_layoutcommit_release,
8708 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
8710 struct rpc_message msg = {
8711 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8712 .rpc_argp = &data->args,
8713 .rpc_resp = &data->res,
8714 .rpc_cred = data->cred,
8716 struct rpc_task_setup task_setup_data = {
8717 .task = &data->task,
8718 .rpc_client = NFS_CLIENT(data->args.inode),
8719 .rpc_message = &msg,
8720 .callback_ops = &nfs4_layoutcommit_ops,
8721 .callback_data = data,
8723 struct rpc_task *task;
8726 dprintk("NFS: initiating layoutcommit call. sync %d "
8727 "lbw: %llu inode %lu\n", sync,
8728 data->args.lastbytewritten,
8729 data->args.inode->i_ino);
8732 data->inode = nfs_igrab_and_active(data->args.inode);
8733 if (data->inode == NULL) {
8734 nfs4_layoutcommit_release(data);
8737 task_setup_data.flags = RPC_TASK_ASYNC;
8739 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
8740 task = rpc_run_task(&task_setup_data);
8742 return PTR_ERR(task);
8744 status = task->tk_status;
8745 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
8746 dprintk("%s: status %d\n", __func__, status);
8752 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8753 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8756 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8757 struct nfs_fsinfo *info,
8758 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
8760 struct nfs41_secinfo_no_name_args args = {
8761 .style = SECINFO_STYLE_CURRENT_FH,
8763 struct nfs4_secinfo_res res = {
8766 struct rpc_message msg = {
8767 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8771 struct rpc_clnt *clnt = server->client;
8772 struct rpc_cred *cred = NULL;
8775 if (use_integrity) {
8776 clnt = server->nfs_client->cl_rpcclient;
8777 cred = nfs4_get_clid_cred(server->nfs_client);
8778 msg.rpc_cred = cred;
8781 dprintk("--> %s\n", __func__);
8782 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8784 dprintk("<-- %s status=%d\n", __func__, status);
8793 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8794 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8796 struct nfs4_exception exception = { };
8799 /* first try using integrity protection */
8800 err = -NFS4ERR_WRONGSEC;
8802 /* try to use integrity protection with machine cred */
8803 if (_nfs4_is_integrity_protected(server->nfs_client))
8804 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8808 * if unable to use integrity protection, or SECINFO with
8809 * integrity protection returns NFS4ERR_WRONGSEC (which is
8810 * disallowed by spec, but exists in deployed servers) use
8811 * the current filesystem's rpc_client and the user cred.
8813 if (err == -NFS4ERR_WRONGSEC)
8814 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8819 case -NFS4ERR_WRONGSEC:
8823 err = nfs4_handle_exception(server, err, &exception);
8825 } while (exception.retry);
8831 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8832 struct nfs_fsinfo *info)
8836 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
8837 struct nfs4_secinfo_flavors *flavors;
8838 struct nfs4_secinfo4 *secinfo;
8841 page = alloc_page(GFP_KERNEL);
8847 flavors = page_address(page);
8848 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8851 * Fall back on "guess and check" method if
8852 * the server doesn't support SECINFO_NO_NAME
8854 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
8855 err = nfs4_find_root_sec(server, fhandle, info);
8861 for (i = 0; i < flavors->num_flavors; i++) {
8862 secinfo = &flavors->flavors[i];
8864 switch (secinfo->flavor) {
8868 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8869 &secinfo->flavor_info);
8872 flavor = RPC_AUTH_MAXFLAVOR;
8876 if (!nfs_auth_info_match(&server->auth_info, flavor))
8877 flavor = RPC_AUTH_MAXFLAVOR;
8879 if (flavor != RPC_AUTH_MAXFLAVOR) {
8880 err = nfs4_lookup_root_sec(server, fhandle,
8887 if (flavor == RPC_AUTH_MAXFLAVOR)
8898 static int _nfs41_test_stateid(struct nfs_server *server,
8899 nfs4_stateid *stateid,
8900 struct rpc_cred *cred)
8903 struct nfs41_test_stateid_args args = {
8906 struct nfs41_test_stateid_res res;
8907 struct rpc_message msg = {
8908 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8913 struct rpc_clnt *rpc_client = server->client;
8915 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8918 dprintk("NFS call test_stateid %p\n", stateid);
8919 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8920 nfs4_set_sequence_privileged(&args.seq_args);
8921 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8922 &args.seq_args, &res.seq_res);
8923 if (status != NFS_OK) {
8924 dprintk("NFS reply test_stateid: failed, %d\n", status);
8927 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
8931 static void nfs4_handle_delay_or_session_error(struct nfs_server *server,
8932 int err, struct nfs4_exception *exception)
8934 exception->retry = 0;
8936 case -NFS4ERR_DELAY:
8937 case -NFS4ERR_RETRY_UNCACHED_REP:
8938 nfs4_handle_exception(server, err, exception);
8940 case -NFS4ERR_BADSESSION:
8941 case -NFS4ERR_BADSLOT:
8942 case -NFS4ERR_BAD_HIGH_SLOT:
8943 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
8944 case -NFS4ERR_DEADSESSION:
8945 nfs4_do_handle_exception(server, err, exception);
8950 * nfs41_test_stateid - perform a TEST_STATEID operation
8952 * @server: server / transport on which to perform the operation
8953 * @stateid: state ID to test
8956 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8957 * Otherwise a negative NFS4ERR value is returned if the operation
8958 * failed or the state ID is not currently valid.
8960 static int nfs41_test_stateid(struct nfs_server *server,
8961 nfs4_stateid *stateid,
8962 struct rpc_cred *cred)
8964 struct nfs4_exception exception = { };
8967 err = _nfs41_test_stateid(server, stateid, cred);
8968 nfs4_handle_delay_or_session_error(server, err, &exception);
8969 } while (exception.retry);
8973 struct nfs_free_stateid_data {
8974 struct nfs_server *server;
8975 struct nfs41_free_stateid_args args;
8976 struct nfs41_free_stateid_res res;
8979 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8981 struct nfs_free_stateid_data *data = calldata;
8982 nfs4_setup_sequence(data->server->nfs_client,
8983 &data->args.seq_args,
8988 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8990 struct nfs_free_stateid_data *data = calldata;
8992 nfs41_sequence_done(task, &data->res.seq_res);
8994 switch (task->tk_status) {
8995 case -NFS4ERR_DELAY:
8996 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
8997 rpc_restart_call_prepare(task);
9001 static void nfs41_free_stateid_release(void *calldata)
9006 static const struct rpc_call_ops nfs41_free_stateid_ops = {
9007 .rpc_call_prepare = nfs41_free_stateid_prepare,
9008 .rpc_call_done = nfs41_free_stateid_done,
9009 .rpc_release = nfs41_free_stateid_release,
9012 static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
9013 const nfs4_stateid *stateid,
9014 struct rpc_cred *cred,
9017 struct rpc_message msg = {
9018 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
9021 struct rpc_task_setup task_setup = {
9022 .rpc_client = server->client,
9023 .rpc_message = &msg,
9024 .callback_ops = &nfs41_free_stateid_ops,
9025 .flags = RPC_TASK_ASYNC,
9027 struct nfs_free_stateid_data *data;
9029 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9030 &task_setup.rpc_client, &msg);
9032 dprintk("NFS call free_stateid %p\n", stateid);
9033 data = kmalloc(sizeof(*data), GFP_NOFS);
9035 return ERR_PTR(-ENOMEM);
9036 data->server = server;
9037 nfs4_stateid_copy(&data->args.stateid, stateid);
9039 task_setup.callback_data = data;
9041 msg.rpc_argp = &data->args;
9042 msg.rpc_resp = &data->res;
9043 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
9045 nfs4_set_sequence_privileged(&data->args.seq_args);
9047 return rpc_run_task(&task_setup);
9051 * nfs41_free_stateid - perform a FREE_STATEID operation
9053 * @server: server / transport on which to perform the operation
9054 * @stateid: state ID to release
9056 * @is_recovery: set to true if this call needs to be privileged
9058 * Note: this function is always asynchronous.
9060 static int nfs41_free_stateid(struct nfs_server *server,
9061 const nfs4_stateid *stateid,
9062 struct rpc_cred *cred,
9065 struct rpc_task *task;
9067 task = _nfs41_free_stateid(server, stateid, cred, is_recovery);
9069 return PTR_ERR(task);
9075 nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
9077 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
9079 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
9080 nfs4_free_lock_state(server, lsp);
9083 static bool nfs41_match_stateid(const nfs4_stateid *s1,
9084 const nfs4_stateid *s2)
9086 if (s1->type != s2->type)
9089 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
9092 if (s1->seqid == s2->seqid)
9095 return s1->seqid == 0 || s2->seqid == 0;
9098 #endif /* CONFIG_NFS_V4_1 */
9100 static bool nfs4_match_stateid(const nfs4_stateid *s1,
9101 const nfs4_stateid *s2)
9103 return nfs4_stateid_match(s1, s2);
9107 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
9108 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9109 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9110 .recover_open = nfs4_open_reclaim,
9111 .recover_lock = nfs4_lock_reclaim,
9112 .establish_clid = nfs4_init_clientid,
9113 .detect_trunking = nfs40_discover_server_trunking,
9116 #if defined(CONFIG_NFS_V4_1)
9117 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
9118 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9119 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9120 .recover_open = nfs4_open_reclaim,
9121 .recover_lock = nfs4_lock_reclaim,
9122 .establish_clid = nfs41_init_clientid,
9123 .reclaim_complete = nfs41_proc_reclaim_complete,
9124 .detect_trunking = nfs41_discover_server_trunking,
9126 #endif /* CONFIG_NFS_V4_1 */
9128 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
9129 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9130 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
9131 .recover_open = nfs40_open_expired,
9132 .recover_lock = nfs4_lock_expired,
9133 .establish_clid = nfs4_init_clientid,
9136 #if defined(CONFIG_NFS_V4_1)
9137 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
9138 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9139 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
9140 .recover_open = nfs41_open_expired,
9141 .recover_lock = nfs41_lock_expired,
9142 .establish_clid = nfs41_init_clientid,
9144 #endif /* CONFIG_NFS_V4_1 */
9146 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
9147 .sched_state_renewal = nfs4_proc_async_renew,
9148 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
9149 .renew_lease = nfs4_proc_renew,
9152 #if defined(CONFIG_NFS_V4_1)
9153 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
9154 .sched_state_renewal = nfs41_proc_async_sequence,
9155 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
9156 .renew_lease = nfs4_proc_sequence,
9160 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
9161 .get_locations = _nfs40_proc_get_locations,
9162 .fsid_present = _nfs40_proc_fsid_present,
9165 #if defined(CONFIG_NFS_V4_1)
9166 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
9167 .get_locations = _nfs41_proc_get_locations,
9168 .fsid_present = _nfs41_proc_fsid_present,
9170 #endif /* CONFIG_NFS_V4_1 */
9172 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
9174 .init_caps = NFS_CAP_READDIRPLUS
9175 | NFS_CAP_ATOMIC_OPEN
9176 | NFS_CAP_POSIX_LOCK,
9177 .init_client = nfs40_init_client,
9178 .shutdown_client = nfs40_shutdown_client,
9179 .match_stateid = nfs4_match_stateid,
9180 .find_root_sec = nfs4_find_root_sec,
9181 .free_lock_state = nfs4_release_lockowner,
9182 .test_and_free_expired = nfs40_test_and_free_expired_stateid,
9183 .alloc_seqid = nfs_alloc_seqid,
9184 .call_sync_ops = &nfs40_call_sync_ops,
9185 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
9186 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
9187 .state_renewal_ops = &nfs40_state_renewal_ops,
9188 .mig_recovery_ops = &nfs40_mig_recovery_ops,
9191 #if defined(CONFIG_NFS_V4_1)
9192 static struct nfs_seqid *
9193 nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
9198 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
9200 .init_caps = NFS_CAP_READDIRPLUS
9201 | NFS_CAP_ATOMIC_OPEN
9202 | NFS_CAP_POSIX_LOCK
9203 | NFS_CAP_STATEID_NFSV41
9204 | NFS_CAP_ATOMIC_OPEN_V1,
9205 .init_client = nfs41_init_client,
9206 .shutdown_client = nfs41_shutdown_client,
9207 .match_stateid = nfs41_match_stateid,
9208 .find_root_sec = nfs41_find_root_sec,
9209 .free_lock_state = nfs41_free_lock_state,
9210 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
9211 .alloc_seqid = nfs_alloc_no_seqid,
9212 .session_trunk = nfs4_test_session_trunk,
9213 .call_sync_ops = &nfs41_call_sync_ops,
9214 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9215 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9216 .state_renewal_ops = &nfs41_state_renewal_ops,
9217 .mig_recovery_ops = &nfs41_mig_recovery_ops,
9221 #if defined(CONFIG_NFS_V4_2)
9222 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
9224 .init_caps = NFS_CAP_READDIRPLUS
9225 | NFS_CAP_ATOMIC_OPEN
9226 | NFS_CAP_POSIX_LOCK
9227 | NFS_CAP_STATEID_NFSV41
9228 | NFS_CAP_ATOMIC_OPEN_V1
9231 | NFS_CAP_DEALLOCATE
9233 | NFS_CAP_LAYOUTSTATS
9235 .init_client = nfs41_init_client,
9236 .shutdown_client = nfs41_shutdown_client,
9237 .match_stateid = nfs41_match_stateid,
9238 .find_root_sec = nfs41_find_root_sec,
9239 .free_lock_state = nfs41_free_lock_state,
9240 .call_sync_ops = &nfs41_call_sync_ops,
9241 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
9242 .alloc_seqid = nfs_alloc_no_seqid,
9243 .session_trunk = nfs4_test_session_trunk,
9244 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9245 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9246 .state_renewal_ops = &nfs41_state_renewal_ops,
9247 .mig_recovery_ops = &nfs41_mig_recovery_ops,
9251 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
9252 [0] = &nfs_v4_0_minor_ops,
9253 #if defined(CONFIG_NFS_V4_1)
9254 [1] = &nfs_v4_1_minor_ops,
9256 #if defined(CONFIG_NFS_V4_2)
9257 [2] = &nfs_v4_2_minor_ops,
9261 static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
9263 ssize_t error, error2;
9265 error = generic_listxattr(dentry, list, size);
9273 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
9276 return error + error2;
9279 static const struct inode_operations nfs4_dir_inode_operations = {
9280 .create = nfs_create,
9281 .lookup = nfs_lookup,
9282 .atomic_open = nfs_atomic_open,
9284 .unlink = nfs_unlink,
9285 .symlink = nfs_symlink,
9289 .rename = nfs_rename,
9290 .permission = nfs_permission,
9291 .getattr = nfs_getattr,
9292 .setattr = nfs_setattr,
9293 .listxattr = nfs4_listxattr,
9296 static const struct inode_operations nfs4_file_inode_operations = {
9297 .permission = nfs_permission,
9298 .getattr = nfs_getattr,
9299 .setattr = nfs_setattr,
9300 .listxattr = nfs4_listxattr,
9303 const struct nfs_rpc_ops nfs_v4_clientops = {
9304 .version = 4, /* protocol version */
9305 .dentry_ops = &nfs4_dentry_operations,
9306 .dir_inode_ops = &nfs4_dir_inode_operations,
9307 .file_inode_ops = &nfs4_file_inode_operations,
9308 .file_ops = &nfs4_file_operations,
9309 .getroot = nfs4_proc_get_root,
9310 .submount = nfs4_submount,
9311 .try_mount = nfs4_try_mount,
9312 .getattr = nfs4_proc_getattr,
9313 .setattr = nfs4_proc_setattr,
9314 .lookup = nfs4_proc_lookup,
9315 .access = nfs4_proc_access,
9316 .readlink = nfs4_proc_readlink,
9317 .create = nfs4_proc_create,
9318 .remove = nfs4_proc_remove,
9319 .unlink_setup = nfs4_proc_unlink_setup,
9320 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
9321 .unlink_done = nfs4_proc_unlink_done,
9322 .rename_setup = nfs4_proc_rename_setup,
9323 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
9324 .rename_done = nfs4_proc_rename_done,
9325 .link = nfs4_proc_link,
9326 .symlink = nfs4_proc_symlink,
9327 .mkdir = nfs4_proc_mkdir,
9328 .rmdir = nfs4_proc_remove,
9329 .readdir = nfs4_proc_readdir,
9330 .mknod = nfs4_proc_mknod,
9331 .statfs = nfs4_proc_statfs,
9332 .fsinfo = nfs4_proc_fsinfo,
9333 .pathconf = nfs4_proc_pathconf,
9334 .set_capabilities = nfs4_server_capabilities,
9335 .decode_dirent = nfs4_decode_dirent,
9336 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
9337 .read_setup = nfs4_proc_read_setup,
9338 .read_done = nfs4_read_done,
9339 .write_setup = nfs4_proc_write_setup,
9340 .write_done = nfs4_write_done,
9341 .commit_setup = nfs4_proc_commit_setup,
9342 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
9343 .commit_done = nfs4_commit_done,
9344 .lock = nfs4_proc_lock,
9345 .clear_acl_cache = nfs4_zap_acl_attr,
9346 .close_context = nfs4_close_context,
9347 .open_context = nfs4_atomic_open,
9348 .have_delegation = nfs4_have_delegation,
9349 .return_delegation = nfs4_inode_return_delegation,
9350 .alloc_client = nfs4_alloc_client,
9351 .init_client = nfs4_init_client,
9352 .free_client = nfs4_free_client,
9353 .create_server = nfs4_create_server,
9354 .clone_server = nfs_clone_server,
9357 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
9358 .name = XATTR_NAME_NFSV4_ACL,
9359 .list = nfs4_xattr_list_nfs4_acl,
9360 .get = nfs4_xattr_get_nfs4_acl,
9361 .set = nfs4_xattr_set_nfs4_acl,
9364 const struct xattr_handler *nfs4_xattr_handlers[] = {
9365 &nfs4_xattr_nfs4_acl_handler,
9366 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
9367 &nfs4_xattr_nfs4_label_handler,