4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #include <linux/delay.h>
40 #include <linux/errno.h>
41 #include <linux/string.h>
42 #include <linux/ratelimit.h>
43 #include <linux/printk.h>
44 #include <linux/slab.h>
45 #include <linux/sunrpc/clnt.h>
46 #include <linux/nfs.h>
47 #include <linux/nfs4.h>
48 #include <linux/nfs_fs.h>
49 #include <linux/nfs_page.h>
50 #include <linux/nfs_mount.h>
51 #include <linux/namei.h>
52 #include <linux/mount.h>
53 #include <linux/module.h>
54 #include <linux/xattr.h>
55 #include <linux/utsname.h>
56 #include <linux/freezer.h>
59 #include "delegation.h"
65 #include "nfs4idmap.h"
66 #include "nfs4session.h"
69 #include "nfs4trace.h"
71 #define NFSDBG_FACILITY NFSDBG_PROC
73 #define NFS4_POLL_RETRY_MIN (HZ/10)
74 #define NFS4_POLL_RETRY_MAX (15*HZ)
76 /* file attributes which can be mapped to nfs attributes */
77 #define NFS4_VALID_ATTRS (ATTR_MODE \
88 static int _nfs4_proc_open(struct nfs4_opendata *data);
89 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
90 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
91 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
92 static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
93 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
94 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
95 struct nfs_fattr *fattr, struct iattr *sattr,
96 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
97 struct nfs4_label *olabel);
98 #ifdef CONFIG_NFS_V4_1
99 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
101 static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *,
102 struct rpc_cred *, bool);
105 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
106 static inline struct nfs4_label *
107 nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
108 struct iattr *sattr, struct nfs4_label *label)
115 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
118 err = security_dentry_init_security(dentry, sattr->ia_mode,
119 &dentry->d_name, (void **)&label->label, &label->len);
126 nfs4_label_release_security(struct nfs4_label *label)
129 security_release_secctx(label->label, label->len);
131 static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
134 return server->attr_bitmask;
136 return server->attr_bitmask_nl;
139 static inline struct nfs4_label *
140 nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
141 struct iattr *sattr, struct nfs4_label *l)
144 nfs4_label_release_security(struct nfs4_label *label)
147 nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
148 { return server->attr_bitmask; }
151 /* Prevent leaks of NFSv4 errors into userland */
152 static int nfs4_map_errors(int err)
157 case -NFS4ERR_RESOURCE:
158 case -NFS4ERR_LAYOUTTRYLATER:
159 case -NFS4ERR_RECALLCONFLICT:
161 case -NFS4ERR_WRONGSEC:
162 case -NFS4ERR_WRONG_CRED:
164 case -NFS4ERR_BADOWNER:
165 case -NFS4ERR_BADNAME:
167 case -NFS4ERR_SHARE_DENIED:
169 case -NFS4ERR_MINOR_VERS_MISMATCH:
170 return -EPROTONOSUPPORT;
171 case -NFS4ERR_FILE_OPEN:
174 dprintk("%s could not handle NFSv4 error %d\n",
182 * This is our standard bitmap for GETATTR requests.
184 const u32 nfs4_fattr_bitmap[3] = {
186 | FATTR4_WORD0_CHANGE
189 | FATTR4_WORD0_FILEID,
191 | FATTR4_WORD1_NUMLINKS
193 | FATTR4_WORD1_OWNER_GROUP
194 | FATTR4_WORD1_RAWDEV
195 | FATTR4_WORD1_SPACE_USED
196 | FATTR4_WORD1_TIME_ACCESS
197 | FATTR4_WORD1_TIME_METADATA
198 | FATTR4_WORD1_TIME_MODIFY
199 | FATTR4_WORD1_MOUNTED_ON_FILEID,
200 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
201 FATTR4_WORD2_SECURITY_LABEL
205 static const u32 nfs4_pnfs_open_bitmap[3] = {
207 | FATTR4_WORD0_CHANGE
210 | FATTR4_WORD0_FILEID,
212 | FATTR4_WORD1_NUMLINKS
214 | FATTR4_WORD1_OWNER_GROUP
215 | FATTR4_WORD1_RAWDEV
216 | FATTR4_WORD1_SPACE_USED
217 | FATTR4_WORD1_TIME_ACCESS
218 | FATTR4_WORD1_TIME_METADATA
219 | FATTR4_WORD1_TIME_MODIFY,
220 FATTR4_WORD2_MDSTHRESHOLD
221 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
222 | FATTR4_WORD2_SECURITY_LABEL
226 static const u32 nfs4_open_noattr_bitmap[3] = {
228 | FATTR4_WORD0_FILEID,
231 const u32 nfs4_statfs_bitmap[3] = {
232 FATTR4_WORD0_FILES_AVAIL
233 | FATTR4_WORD0_FILES_FREE
234 | FATTR4_WORD0_FILES_TOTAL,
235 FATTR4_WORD1_SPACE_AVAIL
236 | FATTR4_WORD1_SPACE_FREE
237 | FATTR4_WORD1_SPACE_TOTAL
240 const u32 nfs4_pathconf_bitmap[3] = {
242 | FATTR4_WORD0_MAXNAME,
246 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
247 | FATTR4_WORD0_MAXREAD
248 | FATTR4_WORD0_MAXWRITE
249 | FATTR4_WORD0_LEASE_TIME,
250 FATTR4_WORD1_TIME_DELTA
251 | FATTR4_WORD1_FS_LAYOUT_TYPES,
252 FATTR4_WORD2_LAYOUT_BLKSIZE
253 | FATTR4_WORD2_CLONE_BLKSIZE
256 const u32 nfs4_fs_locations_bitmap[3] = {
258 | FATTR4_WORD0_CHANGE
261 | FATTR4_WORD0_FILEID
262 | FATTR4_WORD0_FS_LOCATIONS,
264 | FATTR4_WORD1_NUMLINKS
266 | FATTR4_WORD1_OWNER_GROUP
267 | FATTR4_WORD1_RAWDEV
268 | FATTR4_WORD1_SPACE_USED
269 | FATTR4_WORD1_TIME_ACCESS
270 | FATTR4_WORD1_TIME_METADATA
271 | FATTR4_WORD1_TIME_MODIFY
272 | FATTR4_WORD1_MOUNTED_ON_FILEID,
275 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
276 struct nfs4_readdir_arg *readdir)
278 unsigned int attrs = FATTR4_WORD0_FILEID | FATTR4_WORD0_TYPE;
282 readdir->cookie = cookie;
283 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
288 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
293 * NFSv4 servers do not return entries for '.' and '..'
294 * Therefore, we fake these entries here. We let '.'
295 * have cookie 0 and '..' have cookie 1. Note that
296 * when talking to the server, we always send cookie 0
299 start = p = kmap_atomic(*readdir->pages);
302 *p++ = xdr_one; /* next */
303 *p++ = xdr_zero; /* cookie, first word */
304 *p++ = xdr_one; /* cookie, second word */
305 *p++ = xdr_one; /* entry len */
306 memcpy(p, ".\0\0\0", 4); /* entry */
308 *p++ = xdr_one; /* bitmap length */
309 *p++ = htonl(attrs); /* bitmap */
310 *p++ = htonl(12); /* attribute buffer length */
311 *p++ = htonl(NF4DIR);
312 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
315 *p++ = xdr_one; /* next */
316 *p++ = xdr_zero; /* cookie, first word */
317 *p++ = xdr_two; /* cookie, second word */
318 *p++ = xdr_two; /* entry len */
319 memcpy(p, "..\0\0", 4); /* entry */
321 *p++ = xdr_one; /* bitmap length */
322 *p++ = htonl(attrs); /* bitmap */
323 *p++ = htonl(12); /* attribute buffer length */
324 *p++ = htonl(NF4DIR);
325 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
327 readdir->pgbase = (char *)p - (char *)start;
328 readdir->count -= readdir->pgbase;
329 kunmap_atomic(start);
332 static void nfs4_test_and_free_stateid(struct nfs_server *server,
333 nfs4_stateid *stateid,
334 struct rpc_cred *cred)
336 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops;
338 ops->test_and_free_expired(server, stateid, cred);
341 static void __nfs4_free_revoked_stateid(struct nfs_server *server,
342 nfs4_stateid *stateid,
343 struct rpc_cred *cred)
345 stateid->type = NFS4_REVOKED_STATEID_TYPE;
346 nfs4_test_and_free_stateid(server, stateid, cred);
349 static void nfs4_free_revoked_stateid(struct nfs_server *server,
350 const nfs4_stateid *stateid,
351 struct rpc_cred *cred)
355 nfs4_stateid_copy(&tmp, stateid);
356 __nfs4_free_revoked_stateid(server, &tmp, cred);
359 static long nfs4_update_delay(long *timeout)
363 return NFS4_POLL_RETRY_MAX;
365 *timeout = NFS4_POLL_RETRY_MIN;
366 if (*timeout > NFS4_POLL_RETRY_MAX)
367 *timeout = NFS4_POLL_RETRY_MAX;
373 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
379 freezable_schedule_timeout_killable_unsafe(
380 nfs4_update_delay(timeout));
381 if (fatal_signal_pending(current))
386 /* This is the error handling routine for processes that are allowed
389 static int nfs4_do_handle_exception(struct nfs_server *server,
390 int errorcode, struct nfs4_exception *exception)
392 struct nfs_client *clp = server->nfs_client;
393 struct nfs4_state *state = exception->state;
394 const nfs4_stateid *stateid = exception->stateid;
395 struct inode *inode = exception->inode;
398 exception->delay = 0;
399 exception->recovering = 0;
400 exception->retry = 0;
402 if (stateid == NULL && state != NULL)
403 stateid = &state->stateid;
408 case -NFS4ERR_DELEG_REVOKED:
409 case -NFS4ERR_ADMIN_REVOKED:
410 case -NFS4ERR_EXPIRED:
411 case -NFS4ERR_BAD_STATEID:
412 if (inode != NULL && stateid != NULL) {
413 nfs_inode_find_state_and_recover(inode,
415 goto wait_on_recovery;
417 case -NFS4ERR_OPENMODE:
421 err = nfs_async_inode_return_delegation(inode,
424 goto wait_on_recovery;
425 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) {
426 exception->retry = 1;
432 ret = nfs4_schedule_stateid_recovery(server, state);
435 goto wait_on_recovery;
436 case -NFS4ERR_STALE_STATEID:
437 case -NFS4ERR_STALE_CLIENTID:
438 nfs4_schedule_lease_recovery(clp);
439 goto wait_on_recovery;
441 ret = nfs4_schedule_migration_recovery(server);
444 goto wait_on_recovery;
445 case -NFS4ERR_LEASE_MOVED:
446 nfs4_schedule_lease_moved_recovery(clp);
447 goto wait_on_recovery;
448 #if defined(CONFIG_NFS_V4_1)
449 case -NFS4ERR_BADSESSION:
450 case -NFS4ERR_BADSLOT:
451 case -NFS4ERR_BAD_HIGH_SLOT:
452 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
453 case -NFS4ERR_DEADSESSION:
454 case -NFS4ERR_SEQ_FALSE_RETRY:
455 case -NFS4ERR_SEQ_MISORDERED:
456 dprintk("%s ERROR: %d Reset session\n", __func__,
458 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
459 goto wait_on_recovery;
460 #endif /* defined(CONFIG_NFS_V4_1) */
461 case -NFS4ERR_FILE_OPEN:
462 if (exception->timeout > HZ) {
463 /* We have retried a decent amount, time to
470 nfs_inc_server_stats(server, NFSIOS_DELAY);
472 case -NFS4ERR_LAYOUTTRYLATER:
473 case -NFS4ERR_RECALLCONFLICT:
474 exception->delay = 1;
477 case -NFS4ERR_RETRY_UNCACHED_REP:
478 case -NFS4ERR_OLD_STATEID:
479 exception->retry = 1;
481 case -NFS4ERR_BADOWNER:
482 /* The following works around a Linux server bug! */
483 case -NFS4ERR_BADNAME:
484 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
485 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
486 exception->retry = 1;
487 printk(KERN_WARNING "NFS: v4 server %s "
488 "does not accept raw "
490 "Reenabling the idmapper.\n",
491 server->nfs_client->cl_hostname);
494 /* We failed to handle the error */
495 return nfs4_map_errors(ret);
497 exception->recovering = 1;
501 /* This is the error handling routine for processes that are allowed
504 int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
506 struct nfs_client *clp = server->nfs_client;
509 ret = nfs4_do_handle_exception(server, errorcode, exception);
510 if (exception->delay) {
511 ret = nfs4_delay(server->client, &exception->timeout);
514 if (exception->recovering) {
515 ret = nfs4_wait_clnt_recover(clp);
516 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
523 exception->retry = 1;
528 nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
529 int errorcode, struct nfs4_exception *exception)
531 struct nfs_client *clp = server->nfs_client;
534 ret = nfs4_do_handle_exception(server, errorcode, exception);
535 if (exception->delay) {
536 rpc_delay(task, nfs4_update_delay(&exception->timeout));
539 if (exception->recovering) {
540 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
541 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
542 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
545 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
550 exception->retry = 1;
555 nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
556 struct nfs4_state *state, long *timeout)
558 struct nfs4_exception exception = {
562 if (task->tk_status >= 0)
565 exception.timeout = *timeout;
566 task->tk_status = nfs4_async_handle_exception(task, server,
569 if (exception.delay && timeout)
570 *timeout = exception.timeout;
577 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
578 * or 'false' otherwise.
580 static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
582 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
583 return (flavor == RPC_AUTH_GSS_KRB5I) || (flavor == RPC_AUTH_GSS_KRB5P);
586 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
588 spin_lock(&clp->cl_lock);
589 if (time_before(clp->cl_last_renewal,timestamp))
590 clp->cl_last_renewal = timestamp;
591 spin_unlock(&clp->cl_lock);
594 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
596 struct nfs_client *clp = server->nfs_client;
598 if (!nfs4_has_session(clp))
599 do_renew_lease(clp, timestamp);
602 struct nfs4_call_sync_data {
603 const struct nfs_server *seq_server;
604 struct nfs4_sequence_args *seq_args;
605 struct nfs4_sequence_res *seq_res;
608 void nfs4_init_sequence(struct nfs4_sequence_args *args,
609 struct nfs4_sequence_res *res, int cache_reply)
611 args->sa_slot = NULL;
612 args->sa_cache_this = cache_reply;
613 args->sa_privileged = 0;
618 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
620 args->sa_privileged = 1;
623 static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res)
625 struct nfs4_slot *slot = res->sr_slot;
626 struct nfs4_slot_table *tbl;
629 spin_lock(&tbl->slot_tbl_lock);
630 if (!nfs41_wake_and_assign_slot(tbl, slot))
631 nfs4_free_slot(tbl, slot);
632 spin_unlock(&tbl->slot_tbl_lock);
637 static int nfs40_sequence_done(struct rpc_task *task,
638 struct nfs4_sequence_res *res)
640 if (res->sr_slot != NULL)
641 nfs40_sequence_free_slot(res);
645 #if defined(CONFIG_NFS_V4_1)
647 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
649 struct nfs4_session *session;
650 struct nfs4_slot_table *tbl;
651 struct nfs4_slot *slot = res->sr_slot;
652 bool send_new_highest_used_slotid = false;
655 session = tbl->session;
657 /* Bump the slot sequence number */
662 spin_lock(&tbl->slot_tbl_lock);
663 /* Be nice to the server: try to ensure that the last transmitted
664 * value for highest_user_slotid <= target_highest_slotid
666 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
667 send_new_highest_used_slotid = true;
669 if (nfs41_wake_and_assign_slot(tbl, slot)) {
670 send_new_highest_used_slotid = false;
673 nfs4_free_slot(tbl, slot);
675 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
676 send_new_highest_used_slotid = false;
678 spin_unlock(&tbl->slot_tbl_lock);
680 if (send_new_highest_used_slotid)
681 nfs41_notify_server(session->clp);
682 if (waitqueue_active(&tbl->slot_waitq))
683 wake_up_all(&tbl->slot_waitq);
686 static int nfs41_sequence_process(struct rpc_task *task,
687 struct nfs4_sequence_res *res)
689 struct nfs4_session *session;
690 struct nfs4_slot *slot = res->sr_slot;
691 struct nfs_client *clp;
692 bool interrupted = false;
697 /* don't increment the sequence number if the task wasn't sent */
698 if (!RPC_WAS_SENT(task))
701 session = slot->table->session;
703 if (slot->interrupted) {
704 if (res->sr_status != -NFS4ERR_DELAY)
705 slot->interrupted = 0;
709 trace_nfs4_sequence_done(session, res);
710 /* Check the SEQUENCE operation status */
711 switch (res->sr_status) {
713 /* If previous op on slot was interrupted and we reused
714 * the seq# and got a reply from the cache, then retry
716 if (task->tk_status == -EREMOTEIO && interrupted) {
720 /* Update the slot's sequence and clientid lease timer */
723 do_renew_lease(clp, res->sr_timestamp);
724 /* Check sequence flags */
725 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags,
727 nfs41_update_target_slotid(slot->table, slot, res);
731 * sr_status remains 1 if an RPC level error occurred.
732 * The server may or may not have processed the sequence
734 * Mark the slot as having hosted an interrupted RPC call.
736 slot->interrupted = 1;
739 /* The server detected a resend of the RPC call and
740 * returned NFS4ERR_DELAY as per Section 2.10.6.2
743 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
748 case -NFS4ERR_BADSLOT:
750 * The slot id we used was probably retired. Try again
751 * using a different slot id.
754 case -NFS4ERR_SEQ_MISORDERED:
756 * Was the last operation on this sequence interrupted?
757 * If so, retry after bumping the sequence number.
764 * Could this slot have been previously retired?
765 * If so, then the server may be expecting seq_nr = 1!
767 if (slot->seq_nr != 1) {
772 case -NFS4ERR_SEQ_FALSE_RETRY:
776 /* Just update the slot sequence no. */
780 /* The session may be reset by one of the error handlers. */
781 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
785 if (rpc_restart_call_prepare(task)) {
786 nfs41_sequence_free_slot(res);
792 if (!rpc_restart_call(task))
794 rpc_delay(task, NFS4_POLL_RETRY_MAX);
798 int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
800 if (!nfs41_sequence_process(task, res))
802 if (res->sr_slot != NULL)
803 nfs41_sequence_free_slot(res);
807 EXPORT_SYMBOL_GPL(nfs41_sequence_done);
809 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
811 if (res->sr_slot == NULL)
813 if (res->sr_slot->table->session != NULL)
814 return nfs41_sequence_process(task, res);
815 return nfs40_sequence_done(task, res);
818 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
820 if (res->sr_slot != NULL) {
821 if (res->sr_slot->table->session != NULL)
822 nfs41_sequence_free_slot(res);
824 nfs40_sequence_free_slot(res);
828 int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
830 if (res->sr_slot == NULL)
832 if (!res->sr_slot->table->session)
833 return nfs40_sequence_done(task, res);
834 return nfs41_sequence_done(task, res);
836 EXPORT_SYMBOL_GPL(nfs4_sequence_done);
838 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
840 struct nfs4_call_sync_data *data = calldata;
842 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
844 nfs4_setup_sequence(data->seq_server->nfs_client,
845 data->seq_args, data->seq_res, task);
848 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
850 struct nfs4_call_sync_data *data = calldata;
852 nfs41_sequence_done(task, data->seq_res);
855 static const struct rpc_call_ops nfs41_call_sync_ops = {
856 .rpc_call_prepare = nfs41_call_sync_prepare,
857 .rpc_call_done = nfs41_call_sync_done,
860 #else /* !CONFIG_NFS_V4_1 */
862 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
864 return nfs40_sequence_done(task, res);
867 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
869 if (res->sr_slot != NULL)
870 nfs40_sequence_free_slot(res);
873 int nfs4_sequence_done(struct rpc_task *task,
874 struct nfs4_sequence_res *res)
876 return nfs40_sequence_done(task, res);
878 EXPORT_SYMBOL_GPL(nfs4_sequence_done);
880 #endif /* !CONFIG_NFS_V4_1 */
882 int nfs4_setup_sequence(const struct nfs_client *client,
883 struct nfs4_sequence_args *args,
884 struct nfs4_sequence_res *res,
885 struct rpc_task *task)
887 struct nfs4_session *session = nfs4_get_session(client);
888 struct nfs4_slot_table *tbl = client->cl_slot_tbl;
889 struct nfs4_slot *slot;
891 /* slot already allocated? */
892 if (res->sr_slot != NULL)
896 tbl = &session->fc_slot_table;
897 task->tk_timeout = 0;
900 spin_lock(&tbl->slot_tbl_lock);
901 /* The state manager will wait until the slot table is empty */
902 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
905 slot = nfs4_alloc_slot(tbl);
907 /* Try again in 1/4 second */
908 if (slot == ERR_PTR(-ENOMEM))
909 task->tk_timeout = HZ >> 2;
912 spin_unlock(&tbl->slot_tbl_lock);
914 slot->privileged = args->sa_privileged ? 1 : 0;
915 args->sa_slot = slot;
919 res->sr_timestamp = jiffies;
920 res->sr_status_flags = 0;
924 trace_nfs4_setup_sequence(session, args);
926 rpc_call_start(task);
930 if (args->sa_privileged)
931 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
932 NULL, RPC_PRIORITY_PRIVILEGED);
934 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
935 spin_unlock(&tbl->slot_tbl_lock);
938 EXPORT_SYMBOL_GPL(nfs4_setup_sequence);
940 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
942 struct nfs4_call_sync_data *data = calldata;
943 nfs4_setup_sequence(data->seq_server->nfs_client,
944 data->seq_args, data->seq_res, task);
947 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
949 struct nfs4_call_sync_data *data = calldata;
950 nfs4_sequence_done(task, data->seq_res);
953 static const struct rpc_call_ops nfs40_call_sync_ops = {
954 .rpc_call_prepare = nfs40_call_sync_prepare,
955 .rpc_call_done = nfs40_call_sync_done,
958 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
959 struct nfs_server *server,
960 struct rpc_message *msg,
961 struct nfs4_sequence_args *args,
962 struct nfs4_sequence_res *res)
965 struct rpc_task *task;
966 struct nfs_client *clp = server->nfs_client;
967 struct nfs4_call_sync_data data = {
968 .seq_server = server,
972 struct rpc_task_setup task_setup = {
975 .callback_ops = clp->cl_mvops->call_sync_ops,
976 .callback_data = &data
979 task = rpc_run_task(&task_setup);
983 ret = task->tk_status;
989 int nfs4_call_sync(struct rpc_clnt *clnt,
990 struct nfs_server *server,
991 struct rpc_message *msg,
992 struct nfs4_sequence_args *args,
993 struct nfs4_sequence_res *res,
996 nfs4_init_sequence(args, res, cache_reply);
997 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
1000 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo,
1001 unsigned long timestamp)
1003 struct nfs_inode *nfsi = NFS_I(dir);
1005 spin_lock(&dir->i_lock);
1006 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1007 if (cinfo->atomic && cinfo->before == dir->i_version) {
1008 nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE;
1009 nfsi->attrtimeo_timestamp = jiffies;
1011 nfs_force_lookup_revalidate(dir);
1012 if (cinfo->before != dir->i_version)
1013 nfsi->cache_validity |= NFS_INO_INVALID_ACCESS |
1014 NFS_INO_INVALID_ACL;
1016 dir->i_version = cinfo->after;
1017 nfsi->read_cache_jiffies = timestamp;
1018 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
1019 nfs_fscache_invalidate(dir);
1020 spin_unlock(&dir->i_lock);
1023 struct nfs4_opendata {
1025 struct nfs_openargs o_arg;
1026 struct nfs_openres o_res;
1027 struct nfs_open_confirmargs c_arg;
1028 struct nfs_open_confirmres c_res;
1029 struct nfs4_string owner_name;
1030 struct nfs4_string group_name;
1031 struct nfs4_label *a_label;
1032 struct nfs_fattr f_attr;
1033 struct nfs4_label *f_label;
1035 struct dentry *dentry;
1036 struct nfs4_state_owner *owner;
1037 struct nfs4_state *state;
1039 unsigned long timestamp;
1040 unsigned int rpc_done : 1;
1041 unsigned int file_created : 1;
1042 unsigned int is_recover : 1;
1047 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1048 int err, struct nfs4_exception *exception)
1052 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1054 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1055 exception->retry = 1;
1060 nfs4_map_atomic_open_share(struct nfs_server *server,
1061 fmode_t fmode, int openflags)
1065 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1067 res = NFS4_SHARE_ACCESS_READ;
1070 res = NFS4_SHARE_ACCESS_WRITE;
1072 case FMODE_READ|FMODE_WRITE:
1073 res = NFS4_SHARE_ACCESS_BOTH;
1075 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1077 /* Want no delegation if we're using O_DIRECT */
1078 if (openflags & O_DIRECT)
1079 res |= NFS4_SHARE_WANT_NO_DELEG;
1084 static enum open_claim_type4
1085 nfs4_map_atomic_open_claim(struct nfs_server *server,
1086 enum open_claim_type4 claim)
1088 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1093 case NFS4_OPEN_CLAIM_FH:
1094 return NFS4_OPEN_CLAIM_NULL;
1095 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1096 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1097 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1098 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1102 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1104 p->o_res.f_attr = &p->f_attr;
1105 p->o_res.f_label = p->f_label;
1106 p->o_res.seqid = p->o_arg.seqid;
1107 p->c_res.seqid = p->c_arg.seqid;
1108 p->o_res.server = p->o_arg.server;
1109 p->o_res.access_request = p->o_arg.access;
1110 nfs_fattr_init(&p->f_attr);
1111 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
1114 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
1115 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
1116 const struct iattr *attrs,
1117 struct nfs4_label *label,
1118 enum open_claim_type4 claim,
1121 struct dentry *parent = dget_parent(dentry);
1122 struct inode *dir = d_inode(parent);
1123 struct nfs_server *server = NFS_SERVER(dir);
1124 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1125 struct nfs4_opendata *p;
1127 p = kzalloc(sizeof(*p), gfp_mask);
1131 p->f_label = nfs4_label_alloc(server, gfp_mask);
1132 if (IS_ERR(p->f_label))
1135 p->a_label = nfs4_label_alloc(server, gfp_mask);
1136 if (IS_ERR(p->a_label))
1139 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1140 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
1141 if (IS_ERR(p->o_arg.seqid))
1142 goto err_free_label;
1143 nfs_sb_active(dentry->d_sb);
1144 p->dentry = dget(dentry);
1147 atomic_inc(&sp->so_count);
1148 p->o_arg.open_flags = flags;
1149 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
1150 p->o_arg.umask = current_umask();
1151 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1152 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1154 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1155 * will return permission denied for all bits until close */
1156 if (!(flags & O_EXCL)) {
1157 /* ask server to check for all possible rights as results
1159 switch (p->o_arg.claim) {
1162 case NFS4_OPEN_CLAIM_NULL:
1163 case NFS4_OPEN_CLAIM_FH:
1164 p->o_arg.access = NFS4_ACCESS_READ |
1165 NFS4_ACCESS_MODIFY |
1166 NFS4_ACCESS_EXTEND |
1167 NFS4_ACCESS_EXECUTE;
1170 p->o_arg.clientid = server->nfs_client->cl_clientid;
1171 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1172 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
1173 p->o_arg.name = &dentry->d_name;
1174 p->o_arg.server = server;
1175 p->o_arg.bitmask = nfs4_bitmask(server, label);
1176 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1177 p->o_arg.label = nfs4_label_copy(p->a_label, label);
1178 switch (p->o_arg.claim) {
1179 case NFS4_OPEN_CLAIM_NULL:
1180 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1181 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1182 p->o_arg.fh = NFS_FH(dir);
1184 case NFS4_OPEN_CLAIM_PREVIOUS:
1185 case NFS4_OPEN_CLAIM_FH:
1186 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1187 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1188 p->o_arg.fh = NFS_FH(d_inode(dentry));
1190 if (attrs != NULL && attrs->ia_valid != 0) {
1193 p->o_arg.u.attrs = &p->attrs;
1194 memcpy(&p->attrs, attrs, sizeof(p->attrs));
1197 verf[1] = current->pid;
1198 memcpy(p->o_arg.u.verifier.data, verf,
1199 sizeof(p->o_arg.u.verifier.data));
1201 p->c_arg.fh = &p->o_res.fh;
1202 p->c_arg.stateid = &p->o_res.stateid;
1203 p->c_arg.seqid = p->o_arg.seqid;
1204 nfs4_init_opendata_res(p);
1205 kref_init(&p->kref);
1209 nfs4_label_free(p->a_label);
1211 nfs4_label_free(p->f_label);
1219 static void nfs4_opendata_free(struct kref *kref)
1221 struct nfs4_opendata *p = container_of(kref,
1222 struct nfs4_opendata, kref);
1223 struct super_block *sb = p->dentry->d_sb;
1225 nfs_free_seqid(p->o_arg.seqid);
1226 nfs4_sequence_free_slot(&p->o_res.seq_res);
1227 if (p->state != NULL)
1228 nfs4_put_open_state(p->state);
1229 nfs4_put_state_owner(p->owner);
1231 nfs4_label_free(p->a_label);
1232 nfs4_label_free(p->f_label);
1236 nfs_sb_deactive(sb);
1237 nfs_fattr_free_names(&p->f_attr);
1238 kfree(p->f_attr.mdsthreshold);
1242 static void nfs4_opendata_put(struct nfs4_opendata *p)
1245 kref_put(&p->kref, nfs4_opendata_free);
1248 static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1251 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1252 case FMODE_READ|FMODE_WRITE:
1253 return state->n_rdwr != 0;
1255 return state->n_wronly != 0;
1257 return state->n_rdonly != 0;
1263 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
1267 if (open_mode & (O_EXCL|O_TRUNC))
1269 switch (mode & (FMODE_READ|FMODE_WRITE)) {
1271 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1272 && state->n_rdonly != 0;
1275 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1276 && state->n_wronly != 0;
1278 case FMODE_READ|FMODE_WRITE:
1279 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1280 && state->n_rdwr != 0;
1286 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1287 enum open_claim_type4 claim)
1289 if (delegation == NULL)
1291 if ((delegation->type & fmode) != fmode)
1293 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1296 case NFS4_OPEN_CLAIM_NULL:
1297 case NFS4_OPEN_CLAIM_FH:
1299 case NFS4_OPEN_CLAIM_PREVIOUS:
1300 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1305 nfs_mark_delegation_referenced(delegation);
1309 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
1318 case FMODE_READ|FMODE_WRITE:
1321 nfs4_state_set_mode_locked(state, state->state | fmode);
1324 #ifdef CONFIG_NFS_V4_1
1325 static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state)
1327 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags))
1329 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags))
1331 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags))
1335 #endif /* CONFIG_NFS_V4_1 */
1337 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1339 struct nfs_client *clp = state->owner->so_server->nfs_client;
1340 bool need_recover = false;
1342 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1343 need_recover = true;
1344 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1345 need_recover = true;
1346 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1347 need_recover = true;
1349 nfs4_state_mark_reclaim_nograce(clp, state);
1352 static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1353 const nfs4_stateid *stateid, nfs4_stateid *freeme)
1355 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1357 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1358 nfs4_stateid_copy(freeme, &state->open_stateid);
1359 nfs_test_and_clear_all_open_stateid(state);
1362 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1367 static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1369 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1371 if (state->n_wronly)
1372 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1373 if (state->n_rdonly)
1374 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1376 set_bit(NFS_O_RDWR_STATE, &state->flags);
1377 set_bit(NFS_OPEN_STATE, &state->flags);
1380 static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1381 nfs4_stateid *stateid, fmode_t fmode)
1383 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1384 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1386 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1389 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1392 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1393 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1394 clear_bit(NFS_OPEN_STATE, &state->flags);
1396 if (stateid == NULL)
1398 /* Handle OPEN+OPEN_DOWNGRADE races */
1399 if (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1400 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
1401 nfs_resync_open_stateid_locked(state);
1404 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1405 nfs4_stateid_copy(&state->stateid, stateid);
1406 nfs4_stateid_copy(&state->open_stateid, stateid);
1409 static void nfs_clear_open_stateid(struct nfs4_state *state,
1410 nfs4_stateid *arg_stateid,
1411 nfs4_stateid *stateid, fmode_t fmode)
1413 write_seqlock(&state->seqlock);
1414 /* Ignore, if the CLOSE argment doesn't match the current stateid */
1415 if (nfs4_state_match_open_stateid_other(state, arg_stateid))
1416 nfs_clear_open_stateid_locked(state, stateid, fmode);
1417 write_sequnlock(&state->seqlock);
1418 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1419 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1422 static void nfs_set_open_stateid_locked(struct nfs4_state *state,
1423 const nfs4_stateid *stateid, fmode_t fmode,
1424 nfs4_stateid *freeme)
1428 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1431 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1433 case FMODE_READ|FMODE_WRITE:
1434 set_bit(NFS_O_RDWR_STATE, &state->flags);
1436 if (!nfs_need_update_open_stateid(state, stateid, freeme))
1438 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1439 nfs4_stateid_copy(&state->stateid, stateid);
1440 nfs4_stateid_copy(&state->open_stateid, stateid);
1443 static void __update_open_stateid(struct nfs4_state *state,
1444 const nfs4_stateid *open_stateid,
1445 const nfs4_stateid *deleg_stateid,
1447 nfs4_stateid *freeme)
1450 * Protect the call to nfs4_state_set_mode_locked and
1451 * serialise the stateid update
1453 spin_lock(&state->owner->so_lock);
1454 write_seqlock(&state->seqlock);
1455 if (deleg_stateid != NULL) {
1456 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1457 set_bit(NFS_DELEGATED_STATE, &state->flags);
1459 if (open_stateid != NULL)
1460 nfs_set_open_stateid_locked(state, open_stateid, fmode, freeme);
1461 write_sequnlock(&state->seqlock);
1462 update_open_stateflags(state, fmode);
1463 spin_unlock(&state->owner->so_lock);
1466 static int update_open_stateid(struct nfs4_state *state,
1467 const nfs4_stateid *open_stateid,
1468 const nfs4_stateid *delegation,
1471 struct nfs_server *server = NFS_SERVER(state->inode);
1472 struct nfs_client *clp = server->nfs_client;
1473 struct nfs_inode *nfsi = NFS_I(state->inode);
1474 struct nfs_delegation *deleg_cur;
1475 nfs4_stateid freeme = { };
1478 fmode &= (FMODE_READ|FMODE_WRITE);
1481 deleg_cur = rcu_dereference(nfsi->delegation);
1482 if (deleg_cur == NULL)
1485 spin_lock(&deleg_cur->lock);
1486 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
1487 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
1488 (deleg_cur->type & fmode) != fmode)
1489 goto no_delegation_unlock;
1491 if (delegation == NULL)
1492 delegation = &deleg_cur->stateid;
1493 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1494 goto no_delegation_unlock;
1496 nfs_mark_delegation_referenced(deleg_cur);
1497 __update_open_stateid(state, open_stateid, &deleg_cur->stateid,
1500 no_delegation_unlock:
1501 spin_unlock(&deleg_cur->lock);
1505 if (!ret && open_stateid != NULL) {
1506 __update_open_stateid(state, open_stateid, NULL, fmode, &freeme);
1509 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1510 nfs4_schedule_state_manager(clp);
1511 if (freeme.type != 0)
1512 nfs4_test_and_free_stateid(server, &freeme,
1513 state->owner->so_cred);
1518 static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1519 const nfs4_stateid *stateid)
1521 struct nfs4_state *state = lsp->ls_state;
1524 spin_lock(&state->state_lock);
1525 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1527 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1529 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1532 spin_unlock(&state->state_lock);
1536 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1538 struct nfs_delegation *delegation;
1541 delegation = rcu_dereference(NFS_I(inode)->delegation);
1542 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1547 nfs4_inode_return_delegation(inode);
1550 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1552 struct nfs4_state *state = opendata->state;
1553 struct nfs_inode *nfsi = NFS_I(state->inode);
1554 struct nfs_delegation *delegation;
1555 int open_mode = opendata->o_arg.open_flags;
1556 fmode_t fmode = opendata->o_arg.fmode;
1557 enum open_claim_type4 claim = opendata->o_arg.claim;
1558 nfs4_stateid stateid;
1562 spin_lock(&state->owner->so_lock);
1563 if (can_open_cached(state, fmode, open_mode)) {
1564 update_open_stateflags(state, fmode);
1565 spin_unlock(&state->owner->so_lock);
1566 goto out_return_state;
1568 spin_unlock(&state->owner->so_lock);
1570 delegation = rcu_dereference(nfsi->delegation);
1571 if (!can_open_delegated(delegation, fmode, claim)) {
1575 /* Save the delegation */
1576 nfs4_stateid_copy(&stateid, &delegation->stateid);
1578 nfs_release_seqid(opendata->o_arg.seqid);
1579 if (!opendata->is_recover) {
1580 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1586 /* Try to update the stateid using the delegation */
1587 if (update_open_stateid(state, NULL, &stateid, fmode))
1588 goto out_return_state;
1591 return ERR_PTR(ret);
1593 atomic_inc(&state->count);
1598 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1600 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1601 struct nfs_delegation *delegation;
1602 int delegation_flags = 0;
1605 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1607 delegation_flags = delegation->flags;
1609 switch (data->o_arg.claim) {
1612 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1613 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1614 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1615 "returning a delegation for "
1616 "OPEN(CLAIM_DELEGATE_CUR)\n",
1620 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1621 nfs_inode_set_delegation(state->inode,
1622 data->owner->so_cred,
1625 nfs_inode_reclaim_delegation(state->inode,
1626 data->owner->so_cred,
1631 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1632 * and update the nfs4_state.
1634 static struct nfs4_state *
1635 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1637 struct inode *inode = data->state->inode;
1638 struct nfs4_state *state = data->state;
1641 if (!data->rpc_done) {
1642 if (data->rpc_status)
1643 return ERR_PTR(data->rpc_status);
1644 /* cached opens have already been processed */
1648 ret = nfs_refresh_inode(inode, &data->f_attr);
1650 return ERR_PTR(ret);
1652 if (data->o_res.delegation_type != 0)
1653 nfs4_opendata_check_deleg(data, state);
1655 update_open_stateid(state, &data->o_res.stateid, NULL,
1657 atomic_inc(&state->count);
1662 static struct nfs4_state *
1663 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1665 struct inode *inode;
1666 struct nfs4_state *state = NULL;
1669 if (!data->rpc_done) {
1670 state = nfs4_try_open_cached(data);
1671 trace_nfs4_cached_open(data->state);
1676 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1678 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1679 ret = PTR_ERR(inode);
1683 state = nfs4_get_open_state(inode, data->owner);
1686 if (data->o_res.delegation_type != 0)
1687 nfs4_opendata_check_deleg(data, state);
1688 update_open_stateid(state, &data->o_res.stateid, NULL,
1692 nfs_release_seqid(data->o_arg.seqid);
1697 return ERR_PTR(ret);
1700 static struct nfs4_state *
1701 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1703 struct nfs4_state *ret;
1705 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1706 ret =_nfs4_opendata_reclaim_to_nfs4_state(data);
1708 ret = _nfs4_opendata_to_nfs4_state(data);
1709 nfs4_sequence_free_slot(&data->o_res.seq_res);
1713 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1715 struct nfs_inode *nfsi = NFS_I(state->inode);
1716 struct nfs_open_context *ctx;
1718 spin_lock(&state->inode->i_lock);
1719 list_for_each_entry(ctx, &nfsi->open_files, list) {
1720 if (ctx->state != state)
1722 get_nfs_open_context(ctx);
1723 spin_unlock(&state->inode->i_lock);
1726 spin_unlock(&state->inode->i_lock);
1727 return ERR_PTR(-ENOENT);
1730 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1731 struct nfs4_state *state, enum open_claim_type4 claim)
1733 struct nfs4_opendata *opendata;
1735 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1736 NULL, NULL, claim, GFP_NOFS);
1737 if (opendata == NULL)
1738 return ERR_PTR(-ENOMEM);
1739 opendata->state = state;
1740 atomic_inc(&state->count);
1744 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1747 struct nfs4_state *newstate;
1750 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
1752 opendata->o_arg.open_flags = 0;
1753 opendata->o_arg.fmode = fmode;
1754 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1755 NFS_SB(opendata->dentry->d_sb),
1757 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1758 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1759 nfs4_init_opendata_res(opendata);
1760 ret = _nfs4_recover_proc_open(opendata);
1763 newstate = nfs4_opendata_to_nfs4_state(opendata);
1764 if (IS_ERR(newstate))
1765 return PTR_ERR(newstate);
1766 if (newstate != opendata->state)
1768 nfs4_close_state(newstate, fmode);
1772 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1776 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1777 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1778 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1779 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1780 /* memory barrier prior to reading state->n_* */
1781 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1782 clear_bit(NFS_OPEN_STATE, &state->flags);
1784 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1787 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1790 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1794 * We may have performed cached opens for all three recoveries.
1795 * Check if we need to update the current stateid.
1797 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1798 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1799 write_seqlock(&state->seqlock);
1800 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1801 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1802 write_sequnlock(&state->seqlock);
1809 * reclaim state on the server after a reboot.
1811 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1813 struct nfs_delegation *delegation;
1814 struct nfs4_opendata *opendata;
1815 fmode_t delegation_type = 0;
1818 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1819 NFS4_OPEN_CLAIM_PREVIOUS);
1820 if (IS_ERR(opendata))
1821 return PTR_ERR(opendata);
1823 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1824 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1825 delegation_type = delegation->type;
1827 opendata->o_arg.u.delegation_type = delegation_type;
1828 status = nfs4_open_recover(opendata, state);
1829 nfs4_opendata_put(opendata);
1833 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1835 struct nfs_server *server = NFS_SERVER(state->inode);
1836 struct nfs4_exception exception = { };
1839 err = _nfs4_do_open_reclaim(ctx, state);
1840 trace_nfs4_open_reclaim(ctx, 0, err);
1841 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1843 if (err != -NFS4ERR_DELAY)
1845 nfs4_handle_exception(server, err, &exception);
1846 } while (exception.retry);
1850 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1852 struct nfs_open_context *ctx;
1855 ctx = nfs4_state_find_open_context(state);
1858 ret = nfs4_do_open_reclaim(ctx, state);
1859 put_nfs_open_context(ctx);
1863 static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1867 printk(KERN_ERR "NFS: %s: unhandled error "
1868 "%d.\n", __func__, err);
1874 case -NFS4ERR_BADSESSION:
1875 case -NFS4ERR_BADSLOT:
1876 case -NFS4ERR_BAD_HIGH_SLOT:
1877 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1878 case -NFS4ERR_DEADSESSION:
1879 set_bit(NFS_DELEGATED_STATE, &state->flags);
1880 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1882 case -NFS4ERR_STALE_CLIENTID:
1883 case -NFS4ERR_STALE_STATEID:
1884 set_bit(NFS_DELEGATED_STATE, &state->flags);
1885 /* Don't recall a delegation if it was lost */
1886 nfs4_schedule_lease_recovery(server->nfs_client);
1888 case -NFS4ERR_MOVED:
1889 nfs4_schedule_migration_recovery(server);
1891 case -NFS4ERR_LEASE_MOVED:
1892 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1894 case -NFS4ERR_DELEG_REVOKED:
1895 case -NFS4ERR_ADMIN_REVOKED:
1896 case -NFS4ERR_EXPIRED:
1897 case -NFS4ERR_BAD_STATEID:
1898 case -NFS4ERR_OPENMODE:
1899 nfs_inode_find_state_and_recover(state->inode,
1901 nfs4_schedule_stateid_recovery(server, state);
1903 case -NFS4ERR_DELAY:
1904 case -NFS4ERR_GRACE:
1905 set_bit(NFS_DELEGATED_STATE, &state->flags);
1909 case -NFS4ERR_DENIED:
1910 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1916 int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
1917 struct nfs4_state *state, const nfs4_stateid *stateid,
1920 struct nfs_server *server = NFS_SERVER(state->inode);
1921 struct nfs4_opendata *opendata;
1924 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1925 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1926 if (IS_ERR(opendata))
1927 return PTR_ERR(opendata);
1928 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1929 write_seqlock(&state->seqlock);
1930 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1931 write_sequnlock(&state->seqlock);
1932 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1933 switch (type & (FMODE_READ|FMODE_WRITE)) {
1934 case FMODE_READ|FMODE_WRITE:
1936 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1939 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1943 err = nfs4_open_recover_helper(opendata, FMODE_READ);
1945 nfs4_opendata_put(opendata);
1946 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1949 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1951 struct nfs4_opendata *data = calldata;
1953 nfs4_setup_sequence(data->o_arg.server->nfs_client,
1954 &data->c_arg.seq_args, &data->c_res.seq_res, task);
1957 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1959 struct nfs4_opendata *data = calldata;
1961 nfs40_sequence_done(task, &data->c_res.seq_res);
1963 data->rpc_status = task->tk_status;
1964 if (data->rpc_status == 0) {
1965 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1966 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1967 renew_lease(data->o_res.server, data->timestamp);
1972 static void nfs4_open_confirm_release(void *calldata)
1974 struct nfs4_opendata *data = calldata;
1975 struct nfs4_state *state = NULL;
1977 /* If this request hasn't been cancelled, do nothing */
1978 if (data->cancelled == 0)
1980 /* In case of error, no cleanup! */
1981 if (!data->rpc_done)
1983 state = nfs4_opendata_to_nfs4_state(data);
1985 nfs4_close_state(state, data->o_arg.fmode);
1987 nfs4_opendata_put(data);
1990 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1991 .rpc_call_prepare = nfs4_open_confirm_prepare,
1992 .rpc_call_done = nfs4_open_confirm_done,
1993 .rpc_release = nfs4_open_confirm_release,
1997 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1999 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
2001 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
2002 struct rpc_task *task;
2003 struct rpc_message msg = {
2004 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
2005 .rpc_argp = &data->c_arg,
2006 .rpc_resp = &data->c_res,
2007 .rpc_cred = data->owner->so_cred,
2009 struct rpc_task_setup task_setup_data = {
2010 .rpc_client = server->client,
2011 .rpc_message = &msg,
2012 .callback_ops = &nfs4_open_confirm_ops,
2013 .callback_data = data,
2014 .workqueue = nfsiod_workqueue,
2015 .flags = RPC_TASK_ASYNC,
2019 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
2020 kref_get(&data->kref);
2022 data->rpc_status = 0;
2023 data->timestamp = jiffies;
2024 if (data->is_recover)
2025 nfs4_set_sequence_privileged(&data->c_arg.seq_args);
2026 task = rpc_run_task(&task_setup_data);
2028 return PTR_ERR(task);
2029 status = rpc_wait_for_completion_task(task);
2031 data->cancelled = 1;
2034 status = data->rpc_status;
2039 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
2041 struct nfs4_opendata *data = calldata;
2042 struct nfs4_state_owner *sp = data->owner;
2043 struct nfs_client *clp = sp->so_server->nfs_client;
2044 enum open_claim_type4 claim = data->o_arg.claim;
2046 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
2049 * Check if we still need to send an OPEN call, or if we can use
2050 * a delegation instead.
2052 if (data->state != NULL) {
2053 struct nfs_delegation *delegation;
2055 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
2058 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2059 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
2060 goto unlock_no_action;
2063 /* Update client id. */
2064 data->o_arg.clientid = clp->cl_clientid;
2068 case NFS4_OPEN_CLAIM_PREVIOUS:
2069 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
2070 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2071 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
2072 case NFS4_OPEN_CLAIM_FH:
2073 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
2074 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
2076 data->timestamp = jiffies;
2077 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
2078 &data->o_arg.seq_args,
2079 &data->o_res.seq_res,
2081 nfs_release_seqid(data->o_arg.seqid);
2083 /* Set the create mode (note dependency on the session type) */
2084 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2085 if (data->o_arg.open_flags & O_EXCL) {
2086 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2087 if (nfs4_has_persistent_session(clp))
2088 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2089 else if (clp->cl_mvops->minor_version > 0)
2090 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2094 trace_nfs4_cached_open(data->state);
2097 task->tk_action = NULL;
2099 nfs4_sequence_done(task, &data->o_res.seq_res);
2102 static void nfs4_open_done(struct rpc_task *task, void *calldata)
2104 struct nfs4_opendata *data = calldata;
2106 data->rpc_status = task->tk_status;
2108 if (!nfs4_sequence_process(task, &data->o_res.seq_res))
2111 if (task->tk_status == 0) {
2112 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2113 switch (data->o_res.f_attr->mode & S_IFMT) {
2117 data->rpc_status = -ELOOP;
2120 data->rpc_status = -EISDIR;
2123 data->rpc_status = -ENOTDIR;
2126 renew_lease(data->o_res.server, data->timestamp);
2127 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2128 nfs_confirm_seqid(&data->owner->so_seqid, 0);
2133 static void nfs4_open_release(void *calldata)
2135 struct nfs4_opendata *data = calldata;
2136 struct nfs4_state *state = NULL;
2138 /* If this request hasn't been cancelled, do nothing */
2139 if (data->cancelled == 0)
2141 /* In case of error, no cleanup! */
2142 if (data->rpc_status != 0 || !data->rpc_done)
2144 /* In case we need an open_confirm, no cleanup! */
2145 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2147 state = nfs4_opendata_to_nfs4_state(data);
2149 nfs4_close_state(state, data->o_arg.fmode);
2151 nfs4_opendata_put(data);
2154 static const struct rpc_call_ops nfs4_open_ops = {
2155 .rpc_call_prepare = nfs4_open_prepare,
2156 .rpc_call_done = nfs4_open_done,
2157 .rpc_release = nfs4_open_release,
2160 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
2162 struct inode *dir = d_inode(data->dir);
2163 struct nfs_server *server = NFS_SERVER(dir);
2164 struct nfs_openargs *o_arg = &data->o_arg;
2165 struct nfs_openres *o_res = &data->o_res;
2166 struct rpc_task *task;
2167 struct rpc_message msg = {
2168 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2171 .rpc_cred = data->owner->so_cred,
2173 struct rpc_task_setup task_setup_data = {
2174 .rpc_client = server->client,
2175 .rpc_message = &msg,
2176 .callback_ops = &nfs4_open_ops,
2177 .callback_data = data,
2178 .workqueue = nfsiod_workqueue,
2179 .flags = RPC_TASK_ASYNC,
2183 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
2184 kref_get(&data->kref);
2186 data->rpc_status = 0;
2187 data->cancelled = 0;
2188 data->is_recover = 0;
2190 nfs4_set_sequence_privileged(&o_arg->seq_args);
2191 data->is_recover = 1;
2193 task = rpc_run_task(&task_setup_data);
2195 return PTR_ERR(task);
2196 status = rpc_wait_for_completion_task(task);
2198 data->cancelled = 1;
2201 status = data->rpc_status;
2207 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2209 struct inode *dir = d_inode(data->dir);
2210 struct nfs_openres *o_res = &data->o_res;
2213 status = nfs4_run_open_task(data, 1);
2214 if (status != 0 || !data->rpc_done)
2217 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2219 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM)
2220 status = _nfs4_proc_open_confirm(data);
2226 * Additional permission checks in order to distinguish between an
2227 * open for read, and an open for execute. This works around the
2228 * fact that NFSv4 OPEN treats read and execute permissions as being
2230 * Note that in the non-execute case, we want to turn off permission
2231 * checking if we just created a new file (POSIX open() semantics).
2233 static int nfs4_opendata_access(struct rpc_cred *cred,
2234 struct nfs4_opendata *opendata,
2235 struct nfs4_state *state, fmode_t fmode,
2238 struct nfs_access_entry cache;
2241 /* access call failed or for some reason the server doesn't
2242 * support any access modes -- defer access call until later */
2243 if (opendata->o_res.access_supported == 0)
2248 * Use openflags to check for exec, because fmode won't
2249 * always have FMODE_EXEC set when file open for exec.
2251 if (openflags & __FMODE_EXEC) {
2252 /* ONLY check for exec rights */
2254 } else if ((fmode & FMODE_READ) && !opendata->file_created)
2258 cache.jiffies = jiffies;
2259 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2260 nfs_access_add_cache(state->inode, &cache);
2262 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
2269 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2271 static int _nfs4_proc_open(struct nfs4_opendata *data)
2273 struct inode *dir = d_inode(data->dir);
2274 struct nfs_server *server = NFS_SERVER(dir);
2275 struct nfs_openargs *o_arg = &data->o_arg;
2276 struct nfs_openres *o_res = &data->o_res;
2279 status = nfs4_run_open_task(data, 0);
2280 if (!data->rpc_done)
2283 if (status == -NFS4ERR_BADNAME &&
2284 !(o_arg->open_flags & O_CREAT))
2289 nfs_fattr_map_and_free_names(server, &data->f_attr);
2291 if (o_arg->open_flags & O_CREAT) {
2292 if (o_arg->open_flags & O_EXCL)
2293 data->file_created = 1;
2294 else if (o_res->cinfo.before != o_res->cinfo.after)
2295 data->file_created = 1;
2296 if (data->file_created || dir->i_version != o_res->cinfo.after)
2297 update_changeattr(dir, &o_res->cinfo,
2298 o_res->f_attr->time_start);
2300 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2301 server->caps &= ~NFS_CAP_POSIX_LOCK;
2302 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2303 status = _nfs4_proc_open_confirm(data);
2307 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) {
2308 nfs4_sequence_free_slot(&o_res->seq_res);
2309 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
2316 * reclaim state on the server after a network partition.
2317 * Assumes caller holds the appropriate lock
2319 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2321 struct nfs4_opendata *opendata;
2324 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2325 NFS4_OPEN_CLAIM_FH);
2326 if (IS_ERR(opendata))
2327 return PTR_ERR(opendata);
2328 ret = nfs4_open_recover(opendata, state);
2330 d_drop(ctx->dentry);
2331 nfs4_opendata_put(opendata);
2335 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2337 struct nfs_server *server = NFS_SERVER(state->inode);
2338 struct nfs4_exception exception = { };
2342 err = _nfs4_open_expired(ctx, state);
2343 trace_nfs4_open_expired(ctx, 0, err);
2344 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2349 case -NFS4ERR_GRACE:
2350 case -NFS4ERR_DELAY:
2351 nfs4_handle_exception(server, err, &exception);
2354 } while (exception.retry);
2359 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2361 struct nfs_open_context *ctx;
2364 ctx = nfs4_state_find_open_context(state);
2367 ret = nfs4_do_open_expired(ctx, state);
2368 put_nfs_open_context(ctx);
2372 static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state,
2373 const nfs4_stateid *stateid)
2375 nfs_remove_bad_delegation(state->inode, stateid);
2376 write_seqlock(&state->seqlock);
2377 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2378 write_sequnlock(&state->seqlock);
2379 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2382 static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2384 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2385 nfs_finish_clear_delegation_stateid(state, NULL);
2388 static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2390 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2391 nfs40_clear_delegation_stateid(state);
2392 return nfs4_open_expired(sp, state);
2395 static int nfs40_test_and_free_expired_stateid(struct nfs_server *server,
2396 nfs4_stateid *stateid,
2397 struct rpc_cred *cred)
2399 return -NFS4ERR_BAD_STATEID;
2402 #if defined(CONFIG_NFS_V4_1)
2403 static int nfs41_test_and_free_expired_stateid(struct nfs_server *server,
2404 nfs4_stateid *stateid,
2405 struct rpc_cred *cred)
2409 switch (stateid->type) {
2412 case NFS4_INVALID_STATEID_TYPE:
2413 case NFS4_SPECIAL_STATEID_TYPE:
2414 return -NFS4ERR_BAD_STATEID;
2415 case NFS4_REVOKED_STATEID_TYPE:
2419 status = nfs41_test_stateid(server, stateid, cred);
2421 case -NFS4ERR_EXPIRED:
2422 case -NFS4ERR_ADMIN_REVOKED:
2423 case -NFS4ERR_DELEG_REVOKED:
2429 /* Ack the revoked state to the server */
2430 nfs41_free_stateid(server, stateid, cred, true);
2431 return -NFS4ERR_EXPIRED;
2434 static void nfs41_check_delegation_stateid(struct nfs4_state *state)
2436 struct nfs_server *server = NFS_SERVER(state->inode);
2437 nfs4_stateid stateid;
2438 struct nfs_delegation *delegation;
2439 struct rpc_cred *cred;
2442 /* Get the delegation credential for use by test/free_stateid */
2444 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2445 if (delegation == NULL) {
2450 nfs4_stateid_copy(&stateid, &delegation->stateid);
2451 if (test_bit(NFS_DELEGATION_REVOKED, &delegation->flags) ||
2452 !test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED,
2453 &delegation->flags)) {
2455 nfs_finish_clear_delegation_stateid(state, &stateid);
2459 cred = get_rpccred(delegation->cred);
2461 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred);
2462 trace_nfs4_test_delegation_stateid(state, NULL, status);
2463 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID)
2464 nfs_finish_clear_delegation_stateid(state, &stateid);
2470 * nfs41_check_expired_locks - possibly free a lock stateid
2472 * @state: NFSv4 state for an inode
2474 * Returns NFS_OK if recovery for this stateid is now finished.
2475 * Otherwise a negative NFS4ERR value is returned.
2477 static int nfs41_check_expired_locks(struct nfs4_state *state)
2479 int status, ret = NFS_OK;
2480 struct nfs4_lock_state *lsp, *prev = NULL;
2481 struct nfs_server *server = NFS_SERVER(state->inode);
2483 if (!test_bit(LK_STATE_IN_USE, &state->flags))
2486 spin_lock(&state->state_lock);
2487 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
2488 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
2489 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
2491 atomic_inc(&lsp->ls_count);
2492 spin_unlock(&state->state_lock);
2494 nfs4_put_lock_state(prev);
2497 status = nfs41_test_and_free_expired_stateid(server,
2500 trace_nfs4_test_lock_stateid(state, lsp, status);
2501 if (status == -NFS4ERR_EXPIRED ||
2502 status == -NFS4ERR_BAD_STATEID) {
2503 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
2504 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE;
2505 if (!recover_lost_locks)
2506 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2507 } else if (status != NFS_OK) {
2509 nfs4_put_lock_state(prev);
2512 spin_lock(&state->state_lock);
2515 spin_unlock(&state->state_lock);
2516 nfs4_put_lock_state(prev);
2522 * nfs41_check_open_stateid - possibly free an open stateid
2524 * @state: NFSv4 state for an inode
2526 * Returns NFS_OK if recovery for this stateid is now finished.
2527 * Otherwise a negative NFS4ERR value is returned.
2529 static int nfs41_check_open_stateid(struct nfs4_state *state)
2531 struct nfs_server *server = NFS_SERVER(state->inode);
2532 nfs4_stateid *stateid = &state->open_stateid;
2533 struct rpc_cred *cred = state->owner->so_cred;
2536 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) {
2537 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) {
2538 if (nfs4_have_delegation(state->inode, state->state))
2540 return -NFS4ERR_OPENMODE;
2542 return -NFS4ERR_BAD_STATEID;
2544 status = nfs41_test_and_free_expired_stateid(server, stateid, cred);
2545 trace_nfs4_test_open_stateid(state, NULL, status);
2546 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) {
2547 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2548 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2549 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2550 clear_bit(NFS_OPEN_STATE, &state->flags);
2551 stateid->type = NFS4_INVALID_STATEID_TYPE;
2553 if (status != NFS_OK)
2555 if (nfs_open_stateid_recover_openmode(state))
2556 return -NFS4ERR_OPENMODE;
2560 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2564 nfs41_check_delegation_stateid(state);
2565 status = nfs41_check_expired_locks(state);
2566 if (status != NFS_OK)
2568 status = nfs41_check_open_stateid(state);
2569 if (status != NFS_OK)
2570 status = nfs4_open_expired(sp, state);
2576 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2577 * fields corresponding to attributes that were used to store the verifier.
2578 * Make sure we clobber those fields in the later setattr call
2580 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2581 struct iattr *sattr, struct nfs4_label **label)
2583 const u32 *attrset = opendata->o_res.attrset;
2585 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2586 !(sattr->ia_valid & ATTR_ATIME_SET))
2587 sattr->ia_valid |= ATTR_ATIME;
2589 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2590 !(sattr->ia_valid & ATTR_MTIME_SET))
2591 sattr->ia_valid |= ATTR_MTIME;
2593 /* Except MODE, it seems harmless of setting twice. */
2594 if (opendata->o_arg.createmode != NFS4_CREATE_EXCLUSIVE &&
2595 attrset[1] & FATTR4_WORD1_MODE)
2596 sattr->ia_valid &= ~ATTR_MODE;
2598 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2602 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2605 struct nfs_open_context *ctx)
2607 struct nfs4_state_owner *sp = opendata->owner;
2608 struct nfs_server *server = sp->so_server;
2609 struct dentry *dentry;
2610 struct nfs4_state *state;
2614 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2616 ret = _nfs4_proc_open(opendata);
2620 state = nfs4_opendata_to_nfs4_state(opendata);
2621 ret = PTR_ERR(state);
2625 if (server->caps & NFS_CAP_POSIX_LOCK)
2626 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2627 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK)
2628 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags);
2630 dentry = opendata->dentry;
2631 if (d_really_is_negative(dentry)) {
2632 struct dentry *alias;
2634 alias = d_exact_alias(dentry, state->inode);
2636 alias = d_splice_alias(igrab(state->inode), dentry);
2637 /* d_splice_alias() can't fail here - it's a non-directory */
2640 ctx->dentry = dentry = alias;
2642 nfs_set_verifier(dentry,
2643 nfs_save_change_attribute(d_inode(opendata->dir)));
2646 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2650 if (d_inode(dentry) == state->inode) {
2651 nfs_inode_attach_open_context(ctx);
2652 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2653 nfs4_schedule_stateid_recovery(server, state);
2660 * Returns a referenced nfs4_state
2662 static int _nfs4_do_open(struct inode *dir,
2663 struct nfs_open_context *ctx,
2665 struct iattr *sattr,
2666 struct nfs4_label *label,
2669 struct nfs4_state_owner *sp;
2670 struct nfs4_state *state = NULL;
2671 struct nfs_server *server = NFS_SERVER(dir);
2672 struct nfs4_opendata *opendata;
2673 struct dentry *dentry = ctx->dentry;
2674 struct rpc_cred *cred = ctx->cred;
2675 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2676 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
2677 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
2678 struct nfs4_label *olabel = NULL;
2681 /* Protect against reboot recovery conflicts */
2683 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2685 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2688 status = nfs4_client_recover_expired_lease(server->nfs_client);
2690 goto err_put_state_owner;
2691 if (d_really_is_positive(dentry))
2692 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
2694 if (d_really_is_positive(dentry))
2695 claim = NFS4_OPEN_CLAIM_FH;
2696 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
2697 label, claim, GFP_KERNEL);
2698 if (opendata == NULL)
2699 goto err_put_state_owner;
2702 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2703 if (IS_ERR(olabel)) {
2704 status = PTR_ERR(olabel);
2705 goto err_opendata_put;
2709 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2710 if (!opendata->f_attr.mdsthreshold) {
2711 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2712 if (!opendata->f_attr.mdsthreshold)
2713 goto err_free_label;
2715 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
2717 if (d_really_is_positive(dentry))
2718 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
2720 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
2722 goto err_free_label;
2725 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
2726 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
2727 nfs4_exclusive_attrset(opendata, sattr, &label);
2729 * send create attributes which was not set by open
2730 * with an extra setattr.
2732 if (sattr->ia_valid & NFS4_VALID_ATTRS) {
2733 nfs_fattr_init(opendata->o_res.f_attr);
2734 status = nfs4_do_setattr(state->inode, cred,
2735 opendata->o_res.f_attr, sattr,
2736 ctx, label, olabel);
2738 nfs_setattr_update_inode(state->inode, sattr,
2739 opendata->o_res.f_attr);
2740 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2744 if (opened && opendata->file_created)
2745 *opened |= FILE_CREATED;
2747 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
2748 *ctx_th = opendata->f_attr.mdsthreshold;
2749 opendata->f_attr.mdsthreshold = NULL;
2752 nfs4_label_free(olabel);
2754 nfs4_opendata_put(opendata);
2755 nfs4_put_state_owner(sp);
2758 nfs4_label_free(olabel);
2760 nfs4_opendata_put(opendata);
2761 err_put_state_owner:
2762 nfs4_put_state_owner(sp);
2768 static struct nfs4_state *nfs4_do_open(struct inode *dir,
2769 struct nfs_open_context *ctx,
2771 struct iattr *sattr,
2772 struct nfs4_label *label,
2775 struct nfs_server *server = NFS_SERVER(dir);
2776 struct nfs4_exception exception = { };
2777 struct nfs4_state *res;
2781 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
2783 trace_nfs4_open_file(ctx, flags, status);
2786 /* NOTE: BAD_SEQID means the server and client disagree about the
2787 * book-keeping w.r.t. state-changing operations
2788 * (OPEN/CLOSE/LOCK/LOCKU...)
2789 * It is actually a sign of a bug on the client or on the server.
2791 * If we receive a BAD_SEQID error in the particular case of
2792 * doing an OPEN, we assume that nfs_increment_open_seqid() will
2793 * have unhashed the old state_owner for us, and that we can
2794 * therefore safely retry using a new one. We should still warn
2795 * the user though...
2797 if (status == -NFS4ERR_BAD_SEQID) {
2798 pr_warn_ratelimited("NFS: v4 server %s "
2799 " returned a bad sequence-id error!\n",
2800 NFS_SERVER(dir)->nfs_client->cl_hostname);
2801 exception.retry = 1;
2805 * BAD_STATEID on OPEN means that the server cancelled our
2806 * state before it received the OPEN_CONFIRM.
2807 * Recover by retrying the request as per the discussion
2808 * on Page 181 of RFC3530.
2810 if (status == -NFS4ERR_BAD_STATEID) {
2811 exception.retry = 1;
2814 if (status == -EAGAIN) {
2815 /* We must have found a delegation */
2816 exception.retry = 1;
2819 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2821 res = ERR_PTR(nfs4_handle_exception(server,
2822 status, &exception));
2823 } while (exception.retry);
2827 static int _nfs4_do_setattr(struct inode *inode,
2828 struct nfs_setattrargs *arg,
2829 struct nfs_setattrres *res,
2830 struct rpc_cred *cred,
2831 struct nfs_open_context *ctx)
2833 struct nfs_server *server = NFS_SERVER(inode);
2834 struct rpc_message msg = {
2835 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2840 struct rpc_cred *delegation_cred = NULL;
2841 unsigned long timestamp = jiffies;
2846 nfs_fattr_init(res->fattr);
2848 /* Servers should only apply open mode checks for file size changes */
2849 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false;
2850 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2852 if (nfs4_copy_delegation_stateid(inode, fmode, &arg->stateid, &delegation_cred)) {
2853 /* Use that stateid */
2854 } else if (truncate && ctx != NULL) {
2855 struct nfs_lock_context *l_ctx;
2856 if (!nfs4_valid_open_stateid(ctx->state))
2858 l_ctx = nfs_get_lock_context(ctx);
2860 return PTR_ERR(l_ctx);
2861 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx,
2862 &arg->stateid, &delegation_cred);
2863 nfs_put_lock_context(l_ctx);
2867 nfs4_stateid_copy(&arg->stateid, &zero_stateid);
2868 if (delegation_cred)
2869 msg.rpc_cred = delegation_cred;
2871 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1);
2873 put_rpccred(delegation_cred);
2874 if (status == 0 && ctx != NULL)
2875 renew_lease(server, timestamp);
2876 trace_nfs4_setattr(inode, &arg->stateid, status);
2880 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2881 struct nfs_fattr *fattr, struct iattr *sattr,
2882 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
2883 struct nfs4_label *olabel)
2885 struct nfs_server *server = NFS_SERVER(inode);
2886 struct nfs4_state *state = ctx ? ctx->state : NULL;
2887 struct nfs_setattrargs arg = {
2888 .fh = NFS_FH(inode),
2891 .bitmask = server->attr_bitmask,
2894 struct nfs_setattrres res = {
2899 struct nfs4_exception exception = {
2902 .stateid = &arg.stateid,
2906 arg.bitmask = nfs4_bitmask(server, ilabel);
2908 arg.bitmask = nfs4_bitmask(server, olabel);
2911 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx);
2913 case -NFS4ERR_OPENMODE:
2914 if (!(sattr->ia_valid & ATTR_SIZE)) {
2915 pr_warn_once("NFSv4: server %s is incorrectly "
2916 "applying open mode checks to "
2917 "a SETATTR that is not "
2918 "changing file size.\n",
2919 server->nfs_client->cl_hostname);
2921 if (state && !(state->state & FMODE_WRITE)) {
2923 if (sattr->ia_valid & ATTR_OPEN)
2928 err = nfs4_handle_exception(server, err, &exception);
2929 } while (exception.retry);
2935 nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
2937 if (inode == NULL || !nfs_have_layout(inode))
2940 return pnfs_wait_on_layoutreturn(inode, task);
2943 struct nfs4_closedata {
2944 struct inode *inode;
2945 struct nfs4_state *state;
2946 struct nfs_closeargs arg;
2947 struct nfs_closeres res;
2949 struct nfs4_layoutreturn_args arg;
2950 struct nfs4_layoutreturn_res res;
2951 struct nfs4_xdr_opaque_data ld_private;
2955 struct nfs_fattr fattr;
2956 unsigned long timestamp;
2959 static void nfs4_free_closedata(void *data)
2961 struct nfs4_closedata *calldata = data;
2962 struct nfs4_state_owner *sp = calldata->state->owner;
2963 struct super_block *sb = calldata->state->inode->i_sb;
2965 if (calldata->lr.roc)
2966 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res,
2967 calldata->res.lr_ret);
2968 nfs4_put_open_state(calldata->state);
2969 nfs_free_seqid(calldata->arg.seqid);
2970 nfs4_put_state_owner(sp);
2971 nfs_sb_deactive(sb);
2975 static void nfs4_close_done(struct rpc_task *task, void *data)
2977 struct nfs4_closedata *calldata = data;
2978 struct nfs4_state *state = calldata->state;
2979 struct nfs_server *server = NFS_SERVER(calldata->inode);
2980 nfs4_stateid *res_stateid = NULL;
2982 dprintk("%s: begin!\n", __func__);
2983 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2985 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
2987 /* Handle Layoutreturn errors */
2988 if (calldata->arg.lr_args && task->tk_status != 0) {
2989 switch (calldata->res.lr_ret) {
2991 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
2994 calldata->arg.lr_args = NULL;
2995 calldata->res.lr_res = NULL;
2997 case -NFS4ERR_ADMIN_REVOKED:
2998 case -NFS4ERR_DELEG_REVOKED:
2999 case -NFS4ERR_EXPIRED:
3000 case -NFS4ERR_BAD_STATEID:
3001 case -NFS4ERR_OLD_STATEID:
3002 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
3003 case -NFS4ERR_WRONG_CRED:
3004 calldata->arg.lr_args = NULL;
3005 calldata->res.lr_res = NULL;
3006 calldata->res.lr_ret = 0;
3007 rpc_restart_call_prepare(task);
3012 /* hmm. we are done with the inode, and in the process of freeing
3013 * the state_owner. we keep this around to process errors
3015 switch (task->tk_status) {
3017 res_stateid = &calldata->res.stateid;
3018 renew_lease(server, calldata->timestamp);
3020 case -NFS4ERR_ACCESS:
3021 if (calldata->arg.bitmask != NULL) {
3022 calldata->arg.bitmask = NULL;
3023 calldata->res.fattr = NULL;
3024 task->tk_status = 0;
3025 rpc_restart_call_prepare(task);
3030 case -NFS4ERR_ADMIN_REVOKED:
3031 case -NFS4ERR_STALE_STATEID:
3032 case -NFS4ERR_EXPIRED:
3033 nfs4_free_revoked_stateid(server,
3034 &calldata->arg.stateid,
3035 task->tk_msg.rpc_cred);
3036 case -NFS4ERR_OLD_STATEID:
3037 case -NFS4ERR_BAD_STATEID:
3038 if (!nfs4_stateid_match(&calldata->arg.stateid,
3039 &state->open_stateid)) {
3040 rpc_restart_call_prepare(task);
3043 if (calldata->arg.fmode == 0)
3046 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
3047 rpc_restart_call_prepare(task);
3051 nfs_clear_open_stateid(state, &calldata->arg.stateid,
3052 res_stateid, calldata->arg.fmode);
3054 nfs_release_seqid(calldata->arg.seqid);
3055 nfs_refresh_inode(calldata->inode, &calldata->fattr);
3056 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
3059 static void nfs4_close_prepare(struct rpc_task *task, void *data)
3061 struct nfs4_closedata *calldata = data;
3062 struct nfs4_state *state = calldata->state;
3063 struct inode *inode = calldata->inode;
3064 bool is_rdonly, is_wronly, is_rdwr;
3067 dprintk("%s: begin!\n", __func__);
3068 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3071 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
3072 spin_lock(&state->owner->so_lock);
3073 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
3074 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
3075 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
3076 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
3077 /* Calculate the change in open mode */
3078 calldata->arg.fmode = 0;
3079 if (state->n_rdwr == 0) {
3080 if (state->n_rdonly == 0)
3081 call_close |= is_rdonly;
3083 calldata->arg.fmode |= FMODE_READ;
3084 if (state->n_wronly == 0)
3085 call_close |= is_wronly;
3087 calldata->arg.fmode |= FMODE_WRITE;
3088 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
3089 call_close |= is_rdwr;
3091 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
3093 if (!nfs4_valid_open_stateid(state) ||
3094 test_bit(NFS_OPEN_STATE, &state->flags) == 0)
3096 spin_unlock(&state->owner->so_lock);
3099 /* Note: exit _without_ calling nfs4_close_done */
3103 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) {
3104 nfs_release_seqid(calldata->arg.seqid);
3108 if (calldata->arg.fmode == 0)
3109 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3111 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) {
3112 /* Close-to-open cache consistency revalidation */
3113 if (!nfs4_have_delegation(inode, FMODE_READ))
3114 calldata->arg.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask;
3116 calldata->arg.bitmask = NULL;
3119 calldata->arg.share_access =
3120 nfs4_map_atomic_open_share(NFS_SERVER(inode),
3121 calldata->arg.fmode, 0);
3123 if (calldata->res.fattr == NULL)
3124 calldata->arg.bitmask = NULL;
3125 else if (calldata->arg.bitmask == NULL)
3126 calldata->res.fattr = NULL;
3127 calldata->timestamp = jiffies;
3128 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client,
3129 &calldata->arg.seq_args,
3130 &calldata->res.seq_res,
3132 nfs_release_seqid(calldata->arg.seqid);
3133 dprintk("%s: done!\n", __func__);
3136 task->tk_action = NULL;
3138 nfs4_sequence_done(task, &calldata->res.seq_res);
3141 static const struct rpc_call_ops nfs4_close_ops = {
3142 .rpc_call_prepare = nfs4_close_prepare,
3143 .rpc_call_done = nfs4_close_done,
3144 .rpc_release = nfs4_free_closedata,
3148 * It is possible for data to be read/written from a mem-mapped file
3149 * after the sys_close call (which hits the vfs layer as a flush).
3150 * This means that we can't safely call nfsv4 close on a file until
3151 * the inode is cleared. This in turn means that we are not good
3152 * NFSv4 citizens - we do not indicate to the server to update the file's
3153 * share state even when we are done with one of the three share
3154 * stateid's in the inode.
3156 * NOTE: Caller must be holding the sp->so_owner semaphore!
3158 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
3160 struct nfs_server *server = NFS_SERVER(state->inode);
3161 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
3162 struct nfs4_closedata *calldata;
3163 struct nfs4_state_owner *sp = state->owner;
3164 struct rpc_task *task;
3165 struct rpc_message msg = {
3166 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
3167 .rpc_cred = state->owner->so_cred,
3169 struct rpc_task_setup task_setup_data = {
3170 .rpc_client = server->client,
3171 .rpc_message = &msg,
3172 .callback_ops = &nfs4_close_ops,
3173 .workqueue = nfsiod_workqueue,
3174 .flags = RPC_TASK_ASYNC,
3176 int status = -ENOMEM;
3178 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
3179 &task_setup_data.rpc_client, &msg);
3181 calldata = kzalloc(sizeof(*calldata), gfp_mask);
3182 if (calldata == NULL)
3184 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
3185 calldata->inode = state->inode;
3186 calldata->state = state;
3187 calldata->arg.fh = NFS_FH(state->inode);
3188 /* Serialization for the sequence id */
3189 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
3190 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
3191 if (IS_ERR(calldata->arg.seqid))
3192 goto out_free_calldata;
3193 nfs_fattr_init(&calldata->fattr);
3194 calldata->arg.fmode = 0;
3195 calldata->lr.arg.ld_private = &calldata->lr.ld_private;
3196 calldata->res.fattr = &calldata->fattr;
3197 calldata->res.seqid = calldata->arg.seqid;
3198 calldata->res.server = server;
3199 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
3200 calldata->lr.roc = pnfs_roc(state->inode,
3201 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred);
3202 if (calldata->lr.roc) {
3203 calldata->arg.lr_args = &calldata->lr.arg;
3204 calldata->res.lr_res = &calldata->lr.res;
3206 nfs_sb_active(calldata->inode->i_sb);
3208 msg.rpc_argp = &calldata->arg;
3209 msg.rpc_resp = &calldata->res;
3210 task_setup_data.callback_data = calldata;
3211 task = rpc_run_task(&task_setup_data);
3213 return PTR_ERR(task);
3216 status = rpc_wait_for_completion_task(task);
3222 nfs4_put_open_state(state);
3223 nfs4_put_state_owner(sp);
3227 static struct inode *
3228 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3229 int open_flags, struct iattr *attr, int *opened)
3231 struct nfs4_state *state;
3232 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
3234 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
3236 /* Protect against concurrent sillydeletes */
3237 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
3239 nfs4_label_release_security(label);
3242 return ERR_CAST(state);
3243 return state->inode;
3246 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
3248 if (ctx->state == NULL)
3251 nfs4_close_sync(ctx->state, ctx->mode);
3253 nfs4_close_state(ctx->state, ctx->mode);
3256 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3257 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
3258 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_MODE_UMASK - 1UL)
3260 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3262 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
3263 struct nfs4_server_caps_arg args = {
3267 struct nfs4_server_caps_res res = {};
3268 struct rpc_message msg = {
3269 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
3276 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3277 FATTR4_WORD0_FH_EXPIRE_TYPE |
3278 FATTR4_WORD0_LINK_SUPPORT |
3279 FATTR4_WORD0_SYMLINK_SUPPORT |
3280 FATTR4_WORD0_ACLSUPPORT;
3282 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3284 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3286 /* Sanity check the server answers */
3287 switch (minorversion) {
3289 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3290 res.attr_bitmask[2] = 0;
3293 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3296 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3298 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
3299 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3300 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3301 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3302 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
3303 NFS_CAP_CTIME|NFS_CAP_MTIME|
3304 NFS_CAP_SECURITY_LABEL);
3305 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3306 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3307 server->caps |= NFS_CAP_ACLS;
3308 if (res.has_links != 0)
3309 server->caps |= NFS_CAP_HARDLINKS;
3310 if (res.has_symlinks != 0)
3311 server->caps |= NFS_CAP_SYMLINKS;
3312 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3313 server->caps |= NFS_CAP_FILEID;
3314 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3315 server->caps |= NFS_CAP_MODE;
3316 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3317 server->caps |= NFS_CAP_NLINK;
3318 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3319 server->caps |= NFS_CAP_OWNER;
3320 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3321 server->caps |= NFS_CAP_OWNER_GROUP;
3322 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3323 server->caps |= NFS_CAP_ATIME;
3324 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3325 server->caps |= NFS_CAP_CTIME;
3326 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3327 server->caps |= NFS_CAP_MTIME;
3328 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
3329 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3330 server->caps |= NFS_CAP_SECURITY_LABEL;
3332 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3333 sizeof(server->attr_bitmask));
3334 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
3336 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3337 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3338 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
3339 server->cache_consistency_bitmask[2] = 0;
3341 /* Avoid a regression due to buggy server */
3342 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++)
3343 res.exclcreat_bitmask[i] &= res.attr_bitmask[i];
3344 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3345 sizeof(server->exclcreat_bitmask));
3347 server->acl_bitmask = res.acl_bitmask;
3348 server->fh_expire_type = res.fh_expire_type;
3354 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3356 struct nfs4_exception exception = { };
3359 err = nfs4_handle_exception(server,
3360 _nfs4_server_capabilities(server, fhandle),
3362 } while (exception.retry);
3366 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3367 struct nfs_fsinfo *info)
3370 struct nfs4_lookup_root_arg args = {
3373 struct nfs4_lookup_res res = {
3375 .fattr = info->fattr,
3378 struct rpc_message msg = {
3379 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3384 bitmask[0] = nfs4_fattr_bitmap[0];
3385 bitmask[1] = nfs4_fattr_bitmap[1];
3387 * Process the label in the upcoming getfattr
3389 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3391 nfs_fattr_init(info->fattr);
3392 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3395 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3396 struct nfs_fsinfo *info)
3398 struct nfs4_exception exception = { };
3401 err = _nfs4_lookup_root(server, fhandle, info);
3402 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
3405 case -NFS4ERR_WRONGSEC:
3408 err = nfs4_handle_exception(server, err, &exception);
3410 } while (exception.retry);
3415 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3416 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3418 struct rpc_auth_create_args auth_args = {
3419 .pseudoflavor = flavor,
3421 struct rpc_auth *auth;
3423 auth = rpcauth_create(&auth_args, server->client);
3426 return nfs4_lookup_root(server, fhandle, info);
3430 * Retry pseudoroot lookup with various security flavors. We do this when:
3432 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3433 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3435 * Returns zero on success, or a negative NFS4ERR value, or a
3436 * negative errno value.
3438 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3439 struct nfs_fsinfo *info)
3441 /* Per 3530bis 15.33.5 */
3442 static const rpc_authflavor_t flav_array[] = {
3446 RPC_AUTH_UNIX, /* courtesy */
3449 int status = -EPERM;
3452 if (server->auth_info.flavor_len > 0) {
3453 /* try each flavor specified by user */
3454 for (i = 0; i < server->auth_info.flavor_len; i++) {
3455 status = nfs4_lookup_root_sec(server, fhandle, info,
3456 server->auth_info.flavors[i]);
3457 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3462 /* no flavors specified by user, try default list */
3463 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3464 status = nfs4_lookup_root_sec(server, fhandle, info,
3466 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3473 * -EACCESS could mean that the user doesn't have correct permissions
3474 * to access the mount. It could also mean that we tried to mount
3475 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3476 * existing mount programs don't handle -EACCES very well so it should
3477 * be mapped to -EPERM instead.
3479 if (status == -EACCES)
3485 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3486 * @server: initialized nfs_server handle
3487 * @fhandle: we fill in the pseudo-fs root file handle
3488 * @info: we fill in an FSINFO struct
3489 * @auth_probe: probe the auth flavours
3491 * Returns zero on success, or a negative errno.
3493 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
3494 struct nfs_fsinfo *info,
3500 status = nfs4_lookup_root(server, fhandle, info);
3502 if (auth_probe || status == NFS4ERR_WRONGSEC)
3503 status = server->nfs_client->cl_mvops->find_root_sec(server,
3507 status = nfs4_server_capabilities(server, fhandle);
3509 status = nfs4_do_fsinfo(server, fhandle, info);
3511 return nfs4_map_errors(status);
3514 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3515 struct nfs_fsinfo *info)
3518 struct nfs_fattr *fattr = info->fattr;
3519 struct nfs4_label *label = NULL;
3521 error = nfs4_server_capabilities(server, mntfh);
3523 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3527 label = nfs4_label_alloc(server, GFP_KERNEL);
3529 return PTR_ERR(label);
3531 error = nfs4_proc_getattr(server, mntfh, fattr, label);
3533 dprintk("nfs4_get_root: getattr error = %d\n", -error);
3534 goto err_free_label;
3537 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3538 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3539 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3542 nfs4_label_free(label);
3548 * Get locations and (maybe) other attributes of a referral.
3549 * Note that we'll actually follow the referral later when
3550 * we detect fsid mismatch in inode revalidation
3552 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3553 const struct qstr *name, struct nfs_fattr *fattr,
3554 struct nfs_fh *fhandle)
3556 int status = -ENOMEM;
3557 struct page *page = NULL;
3558 struct nfs4_fs_locations *locations = NULL;
3560 page = alloc_page(GFP_KERNEL);
3563 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3564 if (locations == NULL)
3567 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
3572 * If the fsid didn't change, this is a migration event, not a
3573 * referral. Cause us to drop into the exception handler, which
3574 * will kick off migration recovery.
3576 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3577 dprintk("%s: server did not return a different fsid for"
3578 " a referral at %s\n", __func__, name->name);
3579 status = -NFS4ERR_MOVED;
3582 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3583 nfs_fixup_referral_attributes(&locations->fattr);
3585 /* replace the lookup nfs_fattr with the locations nfs_fattr */
3586 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
3587 memset(fhandle, 0, sizeof(struct nfs_fh));
3595 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3596 struct nfs_fattr *fattr, struct nfs4_label *label)
3598 struct nfs4_getattr_arg args = {
3600 .bitmask = server->attr_bitmask,
3602 struct nfs4_getattr_res res = {
3607 struct rpc_message msg = {
3608 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3613 args.bitmask = nfs4_bitmask(server, label);
3615 nfs_fattr_init(fattr);
3616 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3619 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3620 struct nfs_fattr *fattr, struct nfs4_label *label)
3622 struct nfs4_exception exception = { };
3625 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3626 trace_nfs4_getattr(server, fhandle, fattr, err);
3627 err = nfs4_handle_exception(server, err,
3629 } while (exception.retry);
3634 * The file is not closed if it is opened due to the a request to change
3635 * the size of the file. The open call will not be needed once the
3636 * VFS layer lookup-intents are implemented.
3638 * Close is called when the inode is destroyed.
3639 * If we haven't opened the file for O_WRONLY, we
3640 * need to in the size_change case to obtain a stateid.
3643 * Because OPEN is always done by name in nfsv4, it is
3644 * possible that we opened a different file by the same
3645 * name. We can recognize this race condition, but we
3646 * can't do anything about it besides returning an error.
3648 * This will be fixed with VFS changes (lookup-intent).
3651 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3652 struct iattr *sattr)
3654 struct inode *inode = d_inode(dentry);
3655 struct rpc_cred *cred = NULL;
3656 struct nfs_open_context *ctx = NULL;
3657 struct nfs4_label *label = NULL;
3660 if (pnfs_ld_layoutret_on_setattr(inode) &&
3661 sattr->ia_valid & ATTR_SIZE &&
3662 sattr->ia_size < i_size_read(inode))
3663 pnfs_commit_and_return_layout(inode);
3665 nfs_fattr_init(fattr);
3667 /* Deal with open(O_TRUNC) */
3668 if (sattr->ia_valid & ATTR_OPEN)
3669 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
3671 /* Optimization: if the end result is no change, don't RPC */
3672 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
3675 /* Search for an existing open(O_WRITE) file */
3676 if (sattr->ia_valid & ATTR_FILE) {
3678 ctx = nfs_file_open_context(sattr->ia_file);
3683 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3685 return PTR_ERR(label);
3687 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL, label);
3689 nfs_setattr_update_inode(inode, sattr, fattr);
3690 nfs_setsecurity(inode, fattr, label);
3692 nfs4_label_free(label);
3696 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3697 const struct qstr *name, struct nfs_fh *fhandle,
3698 struct nfs_fattr *fattr, struct nfs4_label *label)
3700 struct nfs_server *server = NFS_SERVER(dir);
3702 struct nfs4_lookup_arg args = {
3703 .bitmask = server->attr_bitmask,
3704 .dir_fh = NFS_FH(dir),
3707 struct nfs4_lookup_res res = {
3713 struct rpc_message msg = {
3714 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3719 args.bitmask = nfs4_bitmask(server, label);
3721 nfs_fattr_init(fattr);
3723 dprintk("NFS call lookup %s\n", name->name);
3724 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
3725 dprintk("NFS reply lookup: %d\n", status);
3729 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
3731 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
3732 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
3733 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3737 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3738 const struct qstr *name, struct nfs_fh *fhandle,
3739 struct nfs_fattr *fattr, struct nfs4_label *label)
3741 struct nfs4_exception exception = { };
3742 struct rpc_clnt *client = *clnt;
3745 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
3746 trace_nfs4_lookup(dir, name, err);
3748 case -NFS4ERR_BADNAME:
3751 case -NFS4ERR_MOVED:
3752 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
3753 if (err == -NFS4ERR_MOVED)
3754 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3756 case -NFS4ERR_WRONGSEC:
3758 if (client != *clnt)
3760 client = nfs4_negotiate_security(client, dir, name);
3762 return PTR_ERR(client);
3764 exception.retry = 1;
3767 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3769 } while (exception.retry);
3774 else if (client != *clnt)
3775 rpc_shutdown_client(client);
3780 static int nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
3781 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3782 struct nfs4_label *label)
3785 struct rpc_clnt *client = NFS_CLIENT(dir);
3787 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
3788 if (client != NFS_CLIENT(dir)) {
3789 rpc_shutdown_client(client);
3790 nfs_fixup_secinfo_attributes(fattr);
3796 nfs4_proc_lookup_mountpoint(struct inode *dir, const struct qstr *name,
3797 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3799 struct rpc_clnt *client = NFS_CLIENT(dir);
3802 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
3804 return ERR_PTR(status);
3805 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
3808 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3810 struct nfs_server *server = NFS_SERVER(inode);
3811 struct nfs4_accessargs args = {
3812 .fh = NFS_FH(inode),
3813 .bitmask = server->cache_consistency_bitmask,
3815 struct nfs4_accessres res = {
3818 struct rpc_message msg = {
3819 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3822 .rpc_cred = entry->cred,
3824 int mode = entry->mask;
3828 * Determine which access bits we want to ask for...
3830 if (mode & MAY_READ)
3831 args.access |= NFS4_ACCESS_READ;
3832 if (S_ISDIR(inode->i_mode)) {
3833 if (mode & MAY_WRITE)
3834 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3835 if (mode & MAY_EXEC)
3836 args.access |= NFS4_ACCESS_LOOKUP;
3838 if (mode & MAY_WRITE)
3839 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3840 if (mode & MAY_EXEC)
3841 args.access |= NFS4_ACCESS_EXECUTE;
3844 res.fattr = nfs_alloc_fattr();
3845 if (res.fattr == NULL)
3848 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3850 nfs_access_set_mask(entry, res.access);
3851 nfs_refresh_inode(inode, res.fattr);
3853 nfs_free_fattr(res.fattr);
3857 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3859 struct nfs4_exception exception = { };
3862 err = _nfs4_proc_access(inode, entry);
3863 trace_nfs4_access(inode, err);
3864 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3866 } while (exception.retry);
3871 * TODO: For the time being, we don't try to get any attributes
3872 * along with any of the zero-copy operations READ, READDIR,
3875 * In the case of the first three, we want to put the GETATTR
3876 * after the read-type operation -- this is because it is hard
3877 * to predict the length of a GETATTR response in v4, and thus
3878 * align the READ data correctly. This means that the GETATTR
3879 * may end up partially falling into the page cache, and we should
3880 * shift it into the 'tail' of the xdr_buf before processing.
3881 * To do this efficiently, we need to know the total length
3882 * of data received, which doesn't seem to be available outside
3885 * In the case of WRITE, we also want to put the GETATTR after
3886 * the operation -- in this case because we want to make sure
3887 * we get the post-operation mtime and size.
3889 * Both of these changes to the XDR layer would in fact be quite
3890 * minor, but I decided to leave them for a subsequent patch.
3892 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3893 unsigned int pgbase, unsigned int pglen)
3895 struct nfs4_readlink args = {
3896 .fh = NFS_FH(inode),
3901 struct nfs4_readlink_res res;
3902 struct rpc_message msg = {
3903 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3908 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
3911 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3912 unsigned int pgbase, unsigned int pglen)
3914 struct nfs4_exception exception = { };
3917 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3918 trace_nfs4_readlink(inode, err);
3919 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3921 } while (exception.retry);
3926 * This is just for mknod. open(O_CREAT) will always do ->open_context().
3929 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
3932 struct nfs_server *server = NFS_SERVER(dir);
3933 struct nfs4_label l, *ilabel = NULL;
3934 struct nfs_open_context *ctx;
3935 struct nfs4_state *state;
3938 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL);
3940 return PTR_ERR(ctx);
3942 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3944 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
3945 sattr->ia_mode &= ~current_umask();
3946 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
3947 if (IS_ERR(state)) {
3948 status = PTR_ERR(state);
3952 nfs4_label_release_security(ilabel);
3953 put_nfs_open_context(ctx);
3957 static int _nfs4_proc_remove(struct inode *dir, const struct qstr *name)
3959 struct nfs_server *server = NFS_SERVER(dir);
3960 struct nfs_removeargs args = {
3964 struct nfs_removeres res = {
3967 struct rpc_message msg = {
3968 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3972 unsigned long timestamp = jiffies;
3975 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
3977 update_changeattr(dir, &res.cinfo, timestamp);
3981 static int nfs4_proc_remove(struct inode *dir, const struct qstr *name)
3983 struct nfs4_exception exception = { };
3986 err = _nfs4_proc_remove(dir, name);
3987 trace_nfs4_remove(dir, name, err);
3988 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3990 } while (exception.retry);
3994 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
3996 struct nfs_server *server = NFS_SERVER(dir);
3997 struct nfs_removeargs *args = msg->rpc_argp;
3998 struct nfs_removeres *res = msg->rpc_resp;
4000 res->server = server;
4001 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
4002 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
4004 nfs_fattr_init(res->dir_attr);
4007 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
4009 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client,
4010 &data->args.seq_args,
4015 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
4017 struct nfs_unlinkdata *data = task->tk_calldata;
4018 struct nfs_removeres *res = &data->res;
4020 if (!nfs4_sequence_done(task, &res->seq_res))
4022 if (nfs4_async_handle_error(task, res->server, NULL,
4023 &data->timeout) == -EAGAIN)
4025 if (task->tk_status == 0)
4026 update_changeattr(dir, &res->cinfo, res->dir_attr->time_start);
4030 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
4032 struct nfs_server *server = NFS_SERVER(dir);
4033 struct nfs_renameargs *arg = msg->rpc_argp;
4034 struct nfs_renameres *res = msg->rpc_resp;
4036 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
4037 res->server = server;
4038 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
4041 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
4043 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client,
4044 &data->args.seq_args,
4049 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
4050 struct inode *new_dir)
4052 struct nfs_renamedata *data = task->tk_calldata;
4053 struct nfs_renameres *res = &data->res;
4055 if (!nfs4_sequence_done(task, &res->seq_res))
4057 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
4060 if (task->tk_status == 0) {
4061 update_changeattr(old_dir, &res->old_cinfo, res->old_fattr->time_start);
4062 if (new_dir != old_dir)
4063 update_changeattr(new_dir, &res->new_cinfo, res->new_fattr->time_start);
4068 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
4070 struct nfs_server *server = NFS_SERVER(inode);
4071 struct nfs4_link_arg arg = {
4072 .fh = NFS_FH(inode),
4073 .dir_fh = NFS_FH(dir),
4075 .bitmask = server->attr_bitmask,
4077 struct nfs4_link_res res = {
4081 struct rpc_message msg = {
4082 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
4086 int status = -ENOMEM;
4088 res.fattr = nfs_alloc_fattr();
4089 if (res.fattr == NULL)
4092 res.label = nfs4_label_alloc(server, GFP_KERNEL);
4093 if (IS_ERR(res.label)) {
4094 status = PTR_ERR(res.label);
4097 arg.bitmask = nfs4_bitmask(server, res.label);
4099 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4101 update_changeattr(dir, &res.cinfo, res.fattr->time_start);
4102 status = nfs_post_op_update_inode(inode, res.fattr);
4104 nfs_setsecurity(inode, res.fattr, res.label);
4108 nfs4_label_free(res.label);
4111 nfs_free_fattr(res.fattr);
4115 static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
4117 struct nfs4_exception exception = { };
4120 err = nfs4_handle_exception(NFS_SERVER(inode),
4121 _nfs4_proc_link(inode, dir, name),
4123 } while (exception.retry);
4127 struct nfs4_createdata {
4128 struct rpc_message msg;
4129 struct nfs4_create_arg arg;
4130 struct nfs4_create_res res;
4132 struct nfs_fattr fattr;
4133 struct nfs4_label *label;
4136 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
4137 const struct qstr *name, struct iattr *sattr, u32 ftype)
4139 struct nfs4_createdata *data;
4141 data = kzalloc(sizeof(*data), GFP_KERNEL);
4143 struct nfs_server *server = NFS_SERVER(dir);
4145 data->label = nfs4_label_alloc(server, GFP_KERNEL);
4146 if (IS_ERR(data->label))
4149 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
4150 data->msg.rpc_argp = &data->arg;
4151 data->msg.rpc_resp = &data->res;
4152 data->arg.dir_fh = NFS_FH(dir);
4153 data->arg.server = server;
4154 data->arg.name = name;
4155 data->arg.attrs = sattr;
4156 data->arg.ftype = ftype;
4157 data->arg.bitmask = nfs4_bitmask(server, data->label);
4158 data->arg.umask = current_umask();
4159 data->res.server = server;
4160 data->res.fh = &data->fh;
4161 data->res.fattr = &data->fattr;
4162 data->res.label = data->label;
4163 nfs_fattr_init(data->res.fattr);
4171 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
4173 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
4174 &data->arg.seq_args, &data->res.seq_res, 1);
4176 update_changeattr(dir, &data->res.dir_cinfo,
4177 data->res.fattr->time_start);
4178 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
4183 static void nfs4_free_createdata(struct nfs4_createdata *data)
4185 nfs4_label_free(data->label);
4189 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
4190 struct page *page, unsigned int len, struct iattr *sattr,
4191 struct nfs4_label *label)
4193 struct nfs4_createdata *data;
4194 int status = -ENAMETOOLONG;
4196 if (len > NFS4_MAXPATHLEN)
4200 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
4204 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
4205 data->arg.u.symlink.pages = &page;
4206 data->arg.u.symlink.len = len;
4207 data->arg.label = label;
4209 status = nfs4_do_create(dir, dentry, data);
4211 nfs4_free_createdata(data);
4216 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
4217 struct page *page, unsigned int len, struct iattr *sattr)
4219 struct nfs4_exception exception = { };
4220 struct nfs4_label l, *label = NULL;
4223 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4226 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
4227 trace_nfs4_symlink(dir, &dentry->d_name, err);
4228 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4230 } while (exception.retry);
4232 nfs4_label_release_security(label);
4236 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4237 struct iattr *sattr, struct nfs4_label *label)
4239 struct nfs4_createdata *data;
4240 int status = -ENOMEM;
4242 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4246 data->arg.label = label;
4247 status = nfs4_do_create(dir, dentry, data);
4249 nfs4_free_createdata(data);
4254 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4255 struct iattr *sattr)
4257 struct nfs_server *server = NFS_SERVER(dir);
4258 struct nfs4_exception exception = { };
4259 struct nfs4_label l, *label = NULL;
4262 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4264 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4265 sattr->ia_mode &= ~current_umask();
4267 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4268 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4269 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4271 } while (exception.retry);
4272 nfs4_label_release_security(label);
4277 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
4278 u64 cookie, struct page **pages, unsigned int count, int plus)
4280 struct inode *dir = d_inode(dentry);
4281 struct nfs4_readdir_arg args = {
4286 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
4289 struct nfs4_readdir_res res;
4290 struct rpc_message msg = {
4291 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4298 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4300 (unsigned long long)cookie);
4301 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
4302 res.pgbase = args.pgbase;
4303 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4305 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
4306 status += args.pgbase;
4309 nfs_invalidate_atime(dir);
4311 dprintk("%s: returns %d\n", __func__, status);
4315 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
4316 u64 cookie, struct page **pages, unsigned int count, int plus)
4318 struct nfs4_exception exception = { };
4321 err = _nfs4_proc_readdir(dentry, cred, cookie,
4322 pages, count, plus);
4323 trace_nfs4_readdir(d_inode(dentry), err);
4324 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
4326 } while (exception.retry);
4330 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4331 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
4333 struct nfs4_createdata *data;
4334 int mode = sattr->ia_mode;
4335 int status = -ENOMEM;
4337 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4342 data->arg.ftype = NF4FIFO;
4343 else if (S_ISBLK(mode)) {
4344 data->arg.ftype = NF4BLK;
4345 data->arg.u.device.specdata1 = MAJOR(rdev);
4346 data->arg.u.device.specdata2 = MINOR(rdev);
4348 else if (S_ISCHR(mode)) {
4349 data->arg.ftype = NF4CHR;
4350 data->arg.u.device.specdata1 = MAJOR(rdev);
4351 data->arg.u.device.specdata2 = MINOR(rdev);
4352 } else if (!S_ISSOCK(mode)) {
4357 data->arg.label = label;
4358 status = nfs4_do_create(dir, dentry, data);
4360 nfs4_free_createdata(data);
4365 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4366 struct iattr *sattr, dev_t rdev)
4368 struct nfs_server *server = NFS_SERVER(dir);
4369 struct nfs4_exception exception = { };
4370 struct nfs4_label l, *label = NULL;
4373 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4375 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4376 sattr->ia_mode &= ~current_umask();
4378 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4379 trace_nfs4_mknod(dir, &dentry->d_name, err);
4380 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4382 } while (exception.retry);
4384 nfs4_label_release_security(label);
4389 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4390 struct nfs_fsstat *fsstat)
4392 struct nfs4_statfs_arg args = {
4394 .bitmask = server->attr_bitmask,
4396 struct nfs4_statfs_res res = {
4399 struct rpc_message msg = {
4400 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4405 nfs_fattr_init(fsstat->fattr);
4406 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4409 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4411 struct nfs4_exception exception = { };
4414 err = nfs4_handle_exception(server,
4415 _nfs4_proc_statfs(server, fhandle, fsstat),
4417 } while (exception.retry);
4421 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4422 struct nfs_fsinfo *fsinfo)
4424 struct nfs4_fsinfo_arg args = {
4426 .bitmask = server->attr_bitmask,
4428 struct nfs4_fsinfo_res res = {
4431 struct rpc_message msg = {
4432 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4437 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4440 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4442 struct nfs4_exception exception = { };
4443 unsigned long now = jiffies;
4447 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
4448 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
4450 nfs4_set_lease_period(server->nfs_client,
4451 fsinfo->lease_time * HZ,
4455 err = nfs4_handle_exception(server, err, &exception);
4456 } while (exception.retry);
4460 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4464 nfs_fattr_init(fsinfo->fattr);
4465 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
4467 /* block layout checks this! */
4468 server->pnfs_blksize = fsinfo->blksize;
4469 set_pnfs_layoutdriver(server, fhandle, fsinfo);
4475 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4476 struct nfs_pathconf *pathconf)
4478 struct nfs4_pathconf_arg args = {
4480 .bitmask = server->attr_bitmask,
4482 struct nfs4_pathconf_res res = {
4483 .pathconf = pathconf,
4485 struct rpc_message msg = {
4486 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4491 /* None of the pathconf attributes are mandatory to implement */
4492 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4493 memset(pathconf, 0, sizeof(*pathconf));
4497 nfs_fattr_init(pathconf->fattr);
4498 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4501 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4502 struct nfs_pathconf *pathconf)
4504 struct nfs4_exception exception = { };
4508 err = nfs4_handle_exception(server,
4509 _nfs4_proc_pathconf(server, fhandle, pathconf),
4511 } while (exception.retry);
4515 int nfs4_set_rw_stateid(nfs4_stateid *stateid,
4516 const struct nfs_open_context *ctx,
4517 const struct nfs_lock_context *l_ctx,
4520 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL);
4522 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4524 static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4525 const struct nfs_open_context *ctx,
4526 const struct nfs_lock_context *l_ctx,
4529 nfs4_stateid current_stateid;
4531 /* If the current stateid represents a lost lock, then exit */
4532 if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode) == -EIO)
4534 return nfs4_stateid_match(stateid, ¤t_stateid);
4537 static bool nfs4_error_stateid_expired(int err)
4540 case -NFS4ERR_DELEG_REVOKED:
4541 case -NFS4ERR_ADMIN_REVOKED:
4542 case -NFS4ERR_BAD_STATEID:
4543 case -NFS4ERR_STALE_STATEID:
4544 case -NFS4ERR_OLD_STATEID:
4545 case -NFS4ERR_OPENMODE:
4546 case -NFS4ERR_EXPIRED:
4552 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
4554 struct nfs_server *server = NFS_SERVER(hdr->inode);
4556 trace_nfs4_read(hdr, task->tk_status);
4557 if (task->tk_status < 0) {
4558 struct nfs4_exception exception = {
4559 .inode = hdr->inode,
4560 .state = hdr->args.context->state,
4561 .stateid = &hdr->args.stateid,
4563 task->tk_status = nfs4_async_handle_exception(task,
4564 server, task->tk_status, &exception);
4565 if (exception.retry) {
4566 rpc_restart_call_prepare(task);
4571 if (task->tk_status > 0)
4572 renew_lease(server, hdr->timestamp);
4576 static bool nfs4_read_stateid_changed(struct rpc_task *task,
4577 struct nfs_pgio_args *args)
4580 if (!nfs4_error_stateid_expired(task->tk_status) ||
4581 nfs4_stateid_is_current(&args->stateid,
4586 rpc_restart_call_prepare(task);
4590 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4593 dprintk("--> %s\n", __func__);
4595 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4597 if (nfs4_read_stateid_changed(task, &hdr->args))
4599 if (task->tk_status > 0)
4600 nfs_invalidate_atime(hdr->inode);
4601 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4602 nfs4_read_done_cb(task, hdr);
4605 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4606 struct rpc_message *msg)
4608 hdr->timestamp = jiffies;
4609 if (!hdr->pgio_done_cb)
4610 hdr->pgio_done_cb = nfs4_read_done_cb;
4611 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
4612 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
4615 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4616 struct nfs_pgio_header *hdr)
4618 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client,
4619 &hdr->args.seq_args,
4623 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4624 hdr->args.lock_context,
4625 hdr->rw_mode) == -EIO)
4627 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
4632 static int nfs4_write_done_cb(struct rpc_task *task,
4633 struct nfs_pgio_header *hdr)
4635 struct inode *inode = hdr->inode;
4637 trace_nfs4_write(hdr, task->tk_status);
4638 if (task->tk_status < 0) {
4639 struct nfs4_exception exception = {
4640 .inode = hdr->inode,
4641 .state = hdr->args.context->state,
4642 .stateid = &hdr->args.stateid,
4644 task->tk_status = nfs4_async_handle_exception(task,
4645 NFS_SERVER(inode), task->tk_status,
4647 if (exception.retry) {
4648 rpc_restart_call_prepare(task);
4652 if (task->tk_status >= 0) {
4653 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4654 nfs_writeback_update_inode(hdr);
4659 static bool nfs4_write_stateid_changed(struct rpc_task *task,
4660 struct nfs_pgio_args *args)
4663 if (!nfs4_error_stateid_expired(task->tk_status) ||
4664 nfs4_stateid_is_current(&args->stateid,
4669 rpc_restart_call_prepare(task);
4673 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4675 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4677 if (nfs4_write_stateid_changed(task, &hdr->args))
4679 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4680 nfs4_write_done_cb(task, hdr);
4684 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
4686 /* Don't request attributes for pNFS or O_DIRECT writes */
4687 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
4689 /* Otherwise, request attributes if and only if we don't hold
4692 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
4695 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4696 struct rpc_message *msg)
4698 struct nfs_server *server = NFS_SERVER(hdr->inode);
4700 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4701 hdr->args.bitmask = NULL;
4702 hdr->res.fattr = NULL;
4704 hdr->args.bitmask = server->cache_consistency_bitmask;
4706 if (!hdr->pgio_done_cb)
4707 hdr->pgio_done_cb = nfs4_write_done_cb;
4708 hdr->res.server = server;
4709 hdr->timestamp = jiffies;
4711 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
4712 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
4715 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
4717 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client,
4718 &data->args.seq_args,
4723 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
4725 struct inode *inode = data->inode;
4727 trace_nfs4_commit(data, task->tk_status);
4728 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4729 NULL, NULL) == -EAGAIN) {
4730 rpc_restart_call_prepare(task);
4736 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
4738 if (!nfs4_sequence_done(task, &data->res.seq_res))
4740 return data->commit_done_cb(task, data);
4743 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
4745 struct nfs_server *server = NFS_SERVER(data->inode);
4747 if (data->commit_done_cb == NULL)
4748 data->commit_done_cb = nfs4_commit_done_cb;
4749 data->res.server = server;
4750 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
4751 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4754 struct nfs4_renewdata {
4755 struct nfs_client *client;
4756 unsigned long timestamp;
4760 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4761 * standalone procedure for queueing an asynchronous RENEW.
4763 static void nfs4_renew_release(void *calldata)
4765 struct nfs4_renewdata *data = calldata;
4766 struct nfs_client *clp = data->client;
4768 if (atomic_read(&clp->cl_count) > 1)
4769 nfs4_schedule_state_renewal(clp);
4770 nfs_put_client(clp);
4774 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
4776 struct nfs4_renewdata *data = calldata;
4777 struct nfs_client *clp = data->client;
4778 unsigned long timestamp = data->timestamp;
4780 trace_nfs4_renew_async(clp, task->tk_status);
4781 switch (task->tk_status) {
4784 case -NFS4ERR_LEASE_MOVED:
4785 nfs4_schedule_lease_moved_recovery(clp);
4788 /* Unless we're shutting down, schedule state recovery! */
4789 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4791 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
4792 nfs4_schedule_lease_recovery(clp);
4795 nfs4_schedule_path_down_recovery(clp);
4797 do_renew_lease(clp, timestamp);
4800 static const struct rpc_call_ops nfs4_renew_ops = {
4801 .rpc_call_done = nfs4_renew_done,
4802 .rpc_release = nfs4_renew_release,
4805 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
4807 struct rpc_message msg = {
4808 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4812 struct nfs4_renewdata *data;
4814 if (renew_flags == 0)
4816 if (!atomic_inc_not_zero(&clp->cl_count))
4818 data = kmalloc(sizeof(*data), GFP_NOFS);
4820 nfs_put_client(clp);
4824 data->timestamp = jiffies;
4825 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
4826 &nfs4_renew_ops, data);
4829 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
4831 struct rpc_message msg = {
4832 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4836 unsigned long now = jiffies;
4839 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4842 do_renew_lease(clp, now);
4846 static inline int nfs4_server_supports_acls(struct nfs_server *server)
4848 return server->caps & NFS_CAP_ACLS;
4851 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4852 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
4855 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
4857 static int buf_to_pages_noslab(const void *buf, size_t buflen,
4858 struct page **pages)
4860 struct page *newpage, **spages;
4866 len = min_t(size_t, PAGE_SIZE, buflen);
4867 newpage = alloc_page(GFP_KERNEL);
4869 if (newpage == NULL)
4871 memcpy(page_address(newpage), buf, len);
4876 } while (buflen != 0);
4882 __free_page(spages[rc-1]);
4886 struct nfs4_cached_acl {
4892 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4894 struct nfs_inode *nfsi = NFS_I(inode);
4896 spin_lock(&inode->i_lock);
4897 kfree(nfsi->nfs4_acl);
4898 nfsi->nfs4_acl = acl;
4899 spin_unlock(&inode->i_lock);
4902 static void nfs4_zap_acl_attr(struct inode *inode)
4904 nfs4_set_cached_acl(inode, NULL);
4907 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4909 struct nfs_inode *nfsi = NFS_I(inode);
4910 struct nfs4_cached_acl *acl;
4913 spin_lock(&inode->i_lock);
4914 acl = nfsi->nfs4_acl;
4917 if (buf == NULL) /* user is just asking for length */
4919 if (acl->cached == 0)
4921 ret = -ERANGE; /* see getxattr(2) man page */
4922 if (acl->len > buflen)
4924 memcpy(buf, acl->data, acl->len);
4928 spin_unlock(&inode->i_lock);
4932 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
4934 struct nfs4_cached_acl *acl;
4935 size_t buflen = sizeof(*acl) + acl_len;
4937 if (buflen <= PAGE_SIZE) {
4938 acl = kmalloc(buflen, GFP_KERNEL);
4942 _copy_from_pages(acl->data, pages, pgbase, acl_len);
4944 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4951 nfs4_set_cached_acl(inode, acl);
4955 * The getxattr API returns the required buffer length when called with a
4956 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4957 * the required buf. On a NULL buf, we send a page of data to the server
4958 * guessing that the ACL request can be serviced by a page. If so, we cache
4959 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4960 * the cache. If not so, we throw away the page, and cache the required
4961 * length. The next getxattr call will then produce another round trip to
4962 * the server, this time with the input buf of the required size.
4964 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4966 struct page *pages[NFS4ACL_MAXPAGES + 1] = {NULL, };
4967 struct nfs_getaclargs args = {
4968 .fh = NFS_FH(inode),
4972 struct nfs_getaclres res = {
4975 struct rpc_message msg = {
4976 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4980 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1;
4981 int ret = -ENOMEM, i;
4983 if (npages > ARRAY_SIZE(pages))
4986 for (i = 0; i < npages; i++) {
4987 pages[i] = alloc_page(GFP_KERNEL);
4992 /* for decoding across pages */
4993 res.acl_scratch = alloc_page(GFP_KERNEL);
4994 if (!res.acl_scratch)
4997 args.acl_len = npages * PAGE_SIZE;
4999 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
5000 __func__, buf, buflen, npages, args.acl_len);
5001 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
5002 &msg, &args.seq_args, &res.seq_res, 0);
5006 /* Handle the case where the passed-in buffer is too short */
5007 if (res.acl_flags & NFS4_ACL_TRUNC) {
5008 /* Did the user only issue a request for the acl length? */
5014 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
5016 if (res.acl_len > buflen) {
5020 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
5025 for (i = 0; i < npages; i++)
5027 __free_page(pages[i]);
5028 if (res.acl_scratch)
5029 __free_page(res.acl_scratch);
5033 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
5035 struct nfs4_exception exception = { };
5038 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
5039 trace_nfs4_get_acl(inode, ret);
5042 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
5043 } while (exception.retry);
5047 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
5049 struct nfs_server *server = NFS_SERVER(inode);
5052 if (!nfs4_server_supports_acls(server))
5054 ret = nfs_revalidate_inode(server, inode);
5057 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
5058 nfs_zap_acl_cache(inode);
5059 ret = nfs4_read_cached_acl(inode, buf, buflen);
5061 /* -ENOENT is returned if there is no ACL or if there is an ACL
5062 * but no cached acl data, just the acl length */
5064 return nfs4_get_acl_uncached(inode, buf, buflen);
5067 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5069 struct nfs_server *server = NFS_SERVER(inode);
5070 struct page *pages[NFS4ACL_MAXPAGES];
5071 struct nfs_setaclargs arg = {
5072 .fh = NFS_FH(inode),
5076 struct nfs_setaclres res;
5077 struct rpc_message msg = {
5078 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
5082 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
5085 if (!nfs4_server_supports_acls(server))
5087 if (npages > ARRAY_SIZE(pages))
5089 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
5092 nfs4_inode_return_delegation(inode);
5093 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5096 * Free each page after tx, so the only ref left is
5097 * held by the network stack
5100 put_page(pages[i-1]);
5103 * Acl update can result in inode attribute update.
5104 * so mark the attribute cache invalid.
5106 spin_lock(&inode->i_lock);
5107 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
5108 spin_unlock(&inode->i_lock);
5109 nfs_access_zap_cache(inode);
5110 nfs_zap_acl_cache(inode);
5114 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5116 struct nfs4_exception exception = { };
5119 err = __nfs4_proc_set_acl(inode, buf, buflen);
5120 trace_nfs4_set_acl(inode, err);
5121 err = nfs4_handle_exception(NFS_SERVER(inode), err,
5123 } while (exception.retry);
5127 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
5128 static int _nfs4_get_security_label(struct inode *inode, void *buf,
5131 struct nfs_server *server = NFS_SERVER(inode);
5132 struct nfs_fattr fattr;
5133 struct nfs4_label label = {0, 0, buflen, buf};
5135 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
5136 struct nfs4_getattr_arg arg = {
5137 .fh = NFS_FH(inode),
5140 struct nfs4_getattr_res res = {
5145 struct rpc_message msg = {
5146 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
5152 nfs_fattr_init(&fattr);
5154 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
5157 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
5159 if (buflen < label.len)
5164 static int nfs4_get_security_label(struct inode *inode, void *buf,
5167 struct nfs4_exception exception = { };
5170 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5174 err = _nfs4_get_security_label(inode, buf, buflen);
5175 trace_nfs4_get_security_label(inode, err);
5176 err = nfs4_handle_exception(NFS_SERVER(inode), err,
5178 } while (exception.retry);
5182 static int _nfs4_do_set_security_label(struct inode *inode,
5183 struct nfs4_label *ilabel,
5184 struct nfs_fattr *fattr,
5185 struct nfs4_label *olabel)
5188 struct iattr sattr = {0};
5189 struct nfs_server *server = NFS_SERVER(inode);
5190 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
5191 struct nfs_setattrargs arg = {
5192 .fh = NFS_FH(inode),
5198 struct nfs_setattrres res = {
5203 struct rpc_message msg = {
5204 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
5210 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
5212 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5214 dprintk("%s failed: %d\n", __func__, status);
5219 static int nfs4_do_set_security_label(struct inode *inode,
5220 struct nfs4_label *ilabel,
5221 struct nfs_fattr *fattr,
5222 struct nfs4_label *olabel)
5224 struct nfs4_exception exception = { };
5228 err = _nfs4_do_set_security_label(inode, ilabel,
5230 trace_nfs4_set_security_label(inode, err);
5231 err = nfs4_handle_exception(NFS_SERVER(inode), err,
5233 } while (exception.retry);
5238 nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen)
5240 struct nfs4_label ilabel, *olabel = NULL;
5241 struct nfs_fattr fattr;
5242 struct rpc_cred *cred;
5245 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5248 nfs_fattr_init(&fattr);
5252 ilabel.label = (char *)buf;
5253 ilabel.len = buflen;
5255 cred = rpc_lookup_cred();
5257 return PTR_ERR(cred);
5259 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5260 if (IS_ERR(olabel)) {
5261 status = -PTR_ERR(olabel);
5265 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5267 nfs_setsecurity(inode, &fattr, olabel);
5269 nfs4_label_free(olabel);
5274 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */
5277 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5278 nfs4_verifier *bootverf)
5282 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5283 /* An impossible timestamp guarantees this value
5284 * will never match a generated boot time. */
5285 verf[0] = cpu_to_be32(U32_MAX);
5286 verf[1] = cpu_to_be32(U32_MAX);
5288 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
5289 u64 ns = ktime_to_ns(nn->boot_time);
5291 verf[0] = cpu_to_be32(ns >> 32);
5292 verf[1] = cpu_to_be32(ns);
5294 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5298 nfs4_init_nonuniform_client_string(struct nfs_client *clp)
5303 if (clp->cl_owner_id != NULL)
5307 len = 14 + strlen(clp->cl_ipaddr) + 1 +
5308 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5310 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5314 if (len > NFS4_OPAQUE_LIMIT + 1)
5318 * Since this string is allocated at mount time, and held until the
5319 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5320 * about a memory-reclaim deadlock.
5322 str = kmalloc(len, GFP_KERNEL);
5327 scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
5329 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5330 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
5333 clp->cl_owner_id = str;
5338 nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5343 len = 10 + 10 + 1 + 10 + 1 +
5344 strlen(nfs4_client_id_uniquifier) + 1 +
5345 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5347 if (len > NFS4_OPAQUE_LIMIT + 1)
5351 * Since this string is allocated at mount time, and held until the
5352 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5353 * about a memory-reclaim deadlock.
5355 str = kmalloc(len, GFP_KERNEL);
5359 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
5360 clp->rpc_ops->version, clp->cl_minorversion,
5361 nfs4_client_id_uniquifier,
5362 clp->cl_rpcclient->cl_nodename);
5363 clp->cl_owner_id = str;
5368 nfs4_init_uniform_client_string(struct nfs_client *clp)
5373 if (clp->cl_owner_id != NULL)
5376 if (nfs4_client_id_uniquifier[0] != '\0')
5377 return nfs4_init_uniquifier_client_string(clp);
5379 len = 10 + 10 + 1 + 10 + 1 +
5380 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5382 if (len > NFS4_OPAQUE_LIMIT + 1)
5386 * Since this string is allocated at mount time, and held until the
5387 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5388 * about a memory-reclaim deadlock.
5390 str = kmalloc(len, GFP_KERNEL);
5394 scnprintf(str, len, "Linux NFSv%u.%u %s",
5395 clp->rpc_ops->version, clp->cl_minorversion,
5396 clp->cl_rpcclient->cl_nodename);
5397 clp->cl_owner_id = str;
5402 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5403 * services. Advertise one based on the address family of the
5407 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5409 if (strchr(clp->cl_ipaddr, ':') != NULL)
5410 return scnprintf(buf, len, "tcp6");
5412 return scnprintf(buf, len, "tcp");
5415 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5417 struct nfs4_setclientid *sc = calldata;
5419 if (task->tk_status == 0)
5420 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5423 static const struct rpc_call_ops nfs4_setclientid_ops = {
5424 .rpc_call_done = nfs4_setclientid_done,
5428 * nfs4_proc_setclientid - Negotiate client ID
5429 * @clp: state data structure
5430 * @program: RPC program for NFSv4 callback service
5431 * @port: IP port number for NFS4 callback service
5432 * @cred: RPC credential to use for this call
5433 * @res: where to place the result
5435 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5437 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5438 unsigned short port, struct rpc_cred *cred,
5439 struct nfs4_setclientid_res *res)
5441 nfs4_verifier sc_verifier;
5442 struct nfs4_setclientid setclientid = {
5443 .sc_verifier = &sc_verifier,
5447 struct rpc_message msg = {
5448 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5449 .rpc_argp = &setclientid,
5453 struct rpc_task *task;
5454 struct rpc_task_setup task_setup_data = {
5455 .rpc_client = clp->cl_rpcclient,
5456 .rpc_message = &msg,
5457 .callback_ops = &nfs4_setclientid_ops,
5458 .callback_data = &setclientid,
5459 .flags = RPC_TASK_TIMEOUT,
5463 /* nfs_client_id4 */
5464 nfs4_init_boot_verifier(clp, &sc_verifier);
5466 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5467 status = nfs4_init_uniform_client_string(clp);
5469 status = nfs4_init_nonuniform_client_string(clp);
5475 setclientid.sc_netid_len =
5476 nfs4_init_callback_netid(clp,
5477 setclientid.sc_netid,
5478 sizeof(setclientid.sc_netid));
5479 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
5480 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
5481 clp->cl_ipaddr, port >> 8, port & 255);
5483 dprintk("NFS call setclientid auth=%s, '%s'\n",
5484 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5486 task = rpc_run_task(&task_setup_data);
5488 status = PTR_ERR(task);
5491 status = task->tk_status;
5492 if (setclientid.sc_cred) {
5493 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5494 put_rpccred(setclientid.sc_cred);
5498 trace_nfs4_setclientid(clp, status);
5499 dprintk("NFS reply setclientid: %d\n", status);
5504 * nfs4_proc_setclientid_confirm - Confirm client ID
5505 * @clp: state data structure
5506 * @res: result of a previous SETCLIENTID
5507 * @cred: RPC credential to use for this call
5509 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5511 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
5512 struct nfs4_setclientid_res *arg,
5513 struct rpc_cred *cred)
5515 struct rpc_message msg = {
5516 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
5522 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5523 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5525 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5526 trace_nfs4_setclientid_confirm(clp, status);
5527 dprintk("NFS reply setclientid_confirm: %d\n", status);
5531 struct nfs4_delegreturndata {
5532 struct nfs4_delegreturnargs args;
5533 struct nfs4_delegreturnres res;
5535 nfs4_stateid stateid;
5536 unsigned long timestamp;
5538 struct nfs4_layoutreturn_args arg;
5539 struct nfs4_layoutreturn_res res;
5540 struct nfs4_xdr_opaque_data ld_private;
5544 struct nfs_fattr fattr;
5546 struct inode *inode;
5549 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5551 struct nfs4_delegreturndata *data = calldata;
5553 if (!nfs4_sequence_done(task, &data->res.seq_res))
5556 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
5558 /* Handle Layoutreturn errors */
5559 if (data->args.lr_args && task->tk_status != 0) {
5560 switch(data->res.lr_ret) {
5562 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
5565 data->args.lr_args = NULL;
5566 data->res.lr_res = NULL;
5568 case -NFS4ERR_ADMIN_REVOKED:
5569 case -NFS4ERR_DELEG_REVOKED:
5570 case -NFS4ERR_EXPIRED:
5571 case -NFS4ERR_BAD_STATEID:
5572 case -NFS4ERR_OLD_STATEID:
5573 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
5574 case -NFS4ERR_WRONG_CRED:
5575 data->args.lr_args = NULL;
5576 data->res.lr_res = NULL;
5577 data->res.lr_ret = 0;
5578 rpc_restart_call_prepare(task);
5583 switch (task->tk_status) {
5585 renew_lease(data->res.server, data->timestamp);
5587 case -NFS4ERR_ADMIN_REVOKED:
5588 case -NFS4ERR_DELEG_REVOKED:
5589 case -NFS4ERR_EXPIRED:
5590 nfs4_free_revoked_stateid(data->res.server,
5592 task->tk_msg.rpc_cred);
5593 case -NFS4ERR_BAD_STATEID:
5594 case -NFS4ERR_OLD_STATEID:
5595 case -NFS4ERR_STALE_STATEID:
5596 task->tk_status = 0;
5598 case -NFS4ERR_ACCESS:
5599 if (data->args.bitmask) {
5600 data->args.bitmask = NULL;
5601 data->res.fattr = NULL;
5602 task->tk_status = 0;
5603 rpc_restart_call_prepare(task);
5607 if (nfs4_async_handle_error(task, data->res.server,
5608 NULL, NULL) == -EAGAIN) {
5609 rpc_restart_call_prepare(task);
5613 data->rpc_status = task->tk_status;
5616 static void nfs4_delegreturn_release(void *calldata)
5618 struct nfs4_delegreturndata *data = calldata;
5619 struct inode *inode = data->inode;
5623 pnfs_roc_release(&data->lr.arg, &data->lr.res,
5625 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5626 nfs_iput_and_deactive(inode);
5631 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5633 struct nfs4_delegreturndata *d_data;
5635 d_data = (struct nfs4_delegreturndata *)data;
5637 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task))
5640 nfs4_setup_sequence(d_data->res.server->nfs_client,
5641 &d_data->args.seq_args,
5642 &d_data->res.seq_res,
5646 static const struct rpc_call_ops nfs4_delegreturn_ops = {
5647 .rpc_call_prepare = nfs4_delegreturn_prepare,
5648 .rpc_call_done = nfs4_delegreturn_done,
5649 .rpc_release = nfs4_delegreturn_release,
5652 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5654 struct nfs4_delegreturndata *data;
5655 struct nfs_server *server = NFS_SERVER(inode);
5656 struct rpc_task *task;
5657 struct rpc_message msg = {
5658 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5661 struct rpc_task_setup task_setup_data = {
5662 .rpc_client = server->client,
5663 .rpc_message = &msg,
5664 .callback_ops = &nfs4_delegreturn_ops,
5665 .flags = RPC_TASK_ASYNC,
5669 data = kzalloc(sizeof(*data), GFP_NOFS);
5672 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
5674 nfs4_state_protect(server->nfs_client,
5675 NFS_SP4_MACH_CRED_CLEANUP,
5676 &task_setup_data.rpc_client, &msg);
5678 data->args.fhandle = &data->fh;
5679 data->args.stateid = &data->stateid;
5680 data->args.bitmask = server->cache_consistency_bitmask;
5681 nfs_copy_fh(&data->fh, NFS_FH(inode));
5682 nfs4_stateid_copy(&data->stateid, stateid);
5683 data->res.fattr = &data->fattr;
5684 data->res.server = server;
5685 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
5686 data->lr.arg.ld_private = &data->lr.ld_private;
5687 nfs_fattr_init(data->res.fattr);
5688 data->timestamp = jiffies;
5689 data->rpc_status = 0;
5690 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, cred);
5691 data->inode = nfs_igrab_and_active(inode);
5694 data->args.lr_args = &data->lr.arg;
5695 data->res.lr_res = &data->lr.res;
5697 } else if (data->lr.roc) {
5698 pnfs_roc_release(&data->lr.arg, &data->lr.res, 0);
5699 data->lr.roc = false;
5702 task_setup_data.callback_data = data;
5703 msg.rpc_argp = &data->args;
5704 msg.rpc_resp = &data->res;
5705 task = rpc_run_task(&task_setup_data);
5707 return PTR_ERR(task);
5710 status = rpc_wait_for_completion_task(task);
5713 status = data->rpc_status;
5719 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5721 struct nfs_server *server = NFS_SERVER(inode);
5722 struct nfs4_exception exception = { };
5725 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
5726 trace_nfs4_delegreturn(inode, stateid, err);
5728 case -NFS4ERR_STALE_STATEID:
5729 case -NFS4ERR_EXPIRED:
5733 err = nfs4_handle_exception(server, err, &exception);
5734 } while (exception.retry);
5738 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5740 struct inode *inode = state->inode;
5741 struct nfs_server *server = NFS_SERVER(inode);
5742 struct nfs_client *clp = server->nfs_client;
5743 struct nfs_lockt_args arg = {
5744 .fh = NFS_FH(inode),
5747 struct nfs_lockt_res res = {
5750 struct rpc_message msg = {
5751 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5754 .rpc_cred = state->owner->so_cred,
5756 struct nfs4_lock_state *lsp;
5759 arg.lock_owner.clientid = clp->cl_clientid;
5760 status = nfs4_set_lock_state(state, request);
5763 lsp = request->fl_u.nfs4_fl.owner;
5764 arg.lock_owner.id = lsp->ls_seqid.owner_id;
5765 arg.lock_owner.s_dev = server->s_dev;
5766 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5769 request->fl_type = F_UNLCK;
5771 case -NFS4ERR_DENIED:
5774 request->fl_ops->fl_release_private(request);
5775 request->fl_ops = NULL;
5780 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5782 struct nfs4_exception exception = { };
5786 err = _nfs4_proc_getlk(state, cmd, request);
5787 trace_nfs4_get_lock(request, state, cmd, err);
5788 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
5790 } while (exception.retry);
5794 struct nfs4_unlockdata {
5795 struct nfs_locku_args arg;
5796 struct nfs_locku_res res;
5797 struct nfs4_lock_state *lsp;
5798 struct nfs_open_context *ctx;
5799 struct nfs_lock_context *l_ctx;
5800 struct file_lock fl;
5801 struct nfs_server *server;
5802 unsigned long timestamp;
5805 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5806 struct nfs_open_context *ctx,
5807 struct nfs4_lock_state *lsp,
5808 struct nfs_seqid *seqid)
5810 struct nfs4_unlockdata *p;
5811 struct inode *inode = lsp->ls_state->inode;
5813 p = kzalloc(sizeof(*p), GFP_NOFS);
5816 p->arg.fh = NFS_FH(inode);
5818 p->arg.seqid = seqid;
5819 p->res.seqid = seqid;
5821 atomic_inc(&lsp->ls_count);
5822 /* Ensure we don't close file until we're done freeing locks! */
5823 p->ctx = get_nfs_open_context(ctx);
5824 p->l_ctx = nfs_get_lock_context(ctx);
5825 memcpy(&p->fl, fl, sizeof(p->fl));
5826 p->server = NFS_SERVER(inode);
5830 static void nfs4_locku_release_calldata(void *data)
5832 struct nfs4_unlockdata *calldata = data;
5833 nfs_free_seqid(calldata->arg.seqid);
5834 nfs4_put_lock_state(calldata->lsp);
5835 nfs_put_lock_context(calldata->l_ctx);
5836 put_nfs_open_context(calldata->ctx);
5840 static void nfs4_locku_done(struct rpc_task *task, void *data)
5842 struct nfs4_unlockdata *calldata = data;
5844 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5846 switch (task->tk_status) {
5848 renew_lease(calldata->server, calldata->timestamp);
5849 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl);
5850 if (nfs4_update_lock_stateid(calldata->lsp,
5851 &calldata->res.stateid))
5853 case -NFS4ERR_ADMIN_REVOKED:
5854 case -NFS4ERR_EXPIRED:
5855 nfs4_free_revoked_stateid(calldata->server,
5856 &calldata->arg.stateid,
5857 task->tk_msg.rpc_cred);
5858 case -NFS4ERR_BAD_STATEID:
5859 case -NFS4ERR_OLD_STATEID:
5860 case -NFS4ERR_STALE_STATEID:
5861 if (!nfs4_stateid_match(&calldata->arg.stateid,
5862 &calldata->lsp->ls_stateid))
5863 rpc_restart_call_prepare(task);
5866 if (nfs4_async_handle_error(task, calldata->server,
5867 NULL, NULL) == -EAGAIN)
5868 rpc_restart_call_prepare(task);
5870 nfs_release_seqid(calldata->arg.seqid);
5873 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
5875 struct nfs4_unlockdata *calldata = data;
5877 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) &&
5878 nfs_async_iocounter_wait(task, calldata->l_ctx))
5881 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
5883 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
5884 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
5885 /* Note: exit _without_ running nfs4_locku_done */
5888 calldata->timestamp = jiffies;
5889 if (nfs4_setup_sequence(calldata->server->nfs_client,
5890 &calldata->arg.seq_args,
5891 &calldata->res.seq_res,
5893 nfs_release_seqid(calldata->arg.seqid);
5896 task->tk_action = NULL;
5898 nfs4_sequence_done(task, &calldata->res.seq_res);
5901 static const struct rpc_call_ops nfs4_locku_ops = {
5902 .rpc_call_prepare = nfs4_locku_prepare,
5903 .rpc_call_done = nfs4_locku_done,
5904 .rpc_release = nfs4_locku_release_calldata,
5907 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5908 struct nfs_open_context *ctx,
5909 struct nfs4_lock_state *lsp,
5910 struct nfs_seqid *seqid)
5912 struct nfs4_unlockdata *data;
5913 struct rpc_message msg = {
5914 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5915 .rpc_cred = ctx->cred,
5917 struct rpc_task_setup task_setup_data = {
5918 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5919 .rpc_message = &msg,
5920 .callback_ops = &nfs4_locku_ops,
5921 .workqueue = nfsiod_workqueue,
5922 .flags = RPC_TASK_ASYNC,
5925 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5926 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5928 /* Ensure this is an unlock - when canceling a lock, the
5929 * canceled lock is passed in, and it won't be an unlock.
5931 fl->fl_type = F_UNLCK;
5932 if (fl->fl_flags & FL_CLOSE)
5933 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags);
5935 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5937 nfs_free_seqid(seqid);
5938 return ERR_PTR(-ENOMEM);
5941 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5942 msg.rpc_argp = &data->arg;
5943 msg.rpc_resp = &data->res;
5944 task_setup_data.callback_data = data;
5945 return rpc_run_task(&task_setup_data);
5948 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5950 struct inode *inode = state->inode;
5951 struct nfs4_state_owner *sp = state->owner;
5952 struct nfs_inode *nfsi = NFS_I(inode);
5953 struct nfs_seqid *seqid;
5954 struct nfs4_lock_state *lsp;
5955 struct rpc_task *task;
5956 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
5958 unsigned char fl_flags = request->fl_flags;
5960 status = nfs4_set_lock_state(state, request);
5961 /* Unlock _before_ we do the RPC call */
5962 request->fl_flags |= FL_EXISTS;
5963 /* Exclude nfs_delegation_claim_locks() */
5964 mutex_lock(&sp->so_delegreturn_mutex);
5965 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
5966 down_read(&nfsi->rwsem);
5967 if (locks_lock_inode_wait(inode, request) == -ENOENT) {
5968 up_read(&nfsi->rwsem);
5969 mutex_unlock(&sp->so_delegreturn_mutex);
5972 up_read(&nfsi->rwsem);
5973 mutex_unlock(&sp->so_delegreturn_mutex);
5976 /* Is this a delegated lock? */
5977 lsp = request->fl_u.nfs4_fl.owner;
5978 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5980 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5981 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
5985 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
5986 status = PTR_ERR(task);
5989 status = rpc_wait_for_completion_task(task);
5992 request->fl_flags = fl_flags;
5993 trace_nfs4_unlock(request, state, F_SETLK, status);
5997 struct nfs4_lockdata {
5998 struct nfs_lock_args arg;
5999 struct nfs_lock_res res;
6000 struct nfs4_lock_state *lsp;
6001 struct nfs_open_context *ctx;
6002 struct file_lock fl;
6003 unsigned long timestamp;
6006 struct nfs_server *server;
6009 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
6010 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
6013 struct nfs4_lockdata *p;
6014 struct inode *inode = lsp->ls_state->inode;
6015 struct nfs_server *server = NFS_SERVER(inode);
6016 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
6018 p = kzalloc(sizeof(*p), gfp_mask);
6022 p->arg.fh = NFS_FH(inode);
6024 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
6025 if (IS_ERR(p->arg.open_seqid))
6027 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
6028 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
6029 if (IS_ERR(p->arg.lock_seqid))
6030 goto out_free_seqid;
6031 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
6032 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
6033 p->arg.lock_owner.s_dev = server->s_dev;
6034 p->res.lock_seqid = p->arg.lock_seqid;
6037 atomic_inc(&lsp->ls_count);
6038 p->ctx = get_nfs_open_context(ctx);
6039 memcpy(&p->fl, fl, sizeof(p->fl));
6042 nfs_free_seqid(p->arg.open_seqid);
6048 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
6050 struct nfs4_lockdata *data = calldata;
6051 struct nfs4_state *state = data->lsp->ls_state;
6053 dprintk("%s: begin!\n", __func__);
6054 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
6056 /* Do we need to do an open_to_lock_owner? */
6057 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
6058 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
6059 goto out_release_lock_seqid;
6061 nfs4_stateid_copy(&data->arg.open_stateid,
6062 &state->open_stateid);
6063 data->arg.new_lock_owner = 1;
6064 data->res.open_seqid = data->arg.open_seqid;
6066 data->arg.new_lock_owner = 0;
6067 nfs4_stateid_copy(&data->arg.lock_stateid,
6068 &data->lsp->ls_stateid);
6070 if (!nfs4_valid_open_stateid(state)) {
6071 data->rpc_status = -EBADF;
6072 task->tk_action = NULL;
6073 goto out_release_open_seqid;
6075 data->timestamp = jiffies;
6076 if (nfs4_setup_sequence(data->server->nfs_client,
6077 &data->arg.seq_args,
6081 out_release_open_seqid:
6082 nfs_release_seqid(data->arg.open_seqid);
6083 out_release_lock_seqid:
6084 nfs_release_seqid(data->arg.lock_seqid);
6086 nfs4_sequence_done(task, &data->res.seq_res);
6087 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
6090 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
6092 struct nfs4_lockdata *data = calldata;
6093 struct nfs4_lock_state *lsp = data->lsp;
6095 dprintk("%s: begin!\n", __func__);
6097 if (!nfs4_sequence_done(task, &data->res.seq_res))
6100 data->rpc_status = task->tk_status;
6101 switch (task->tk_status) {
6103 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
6105 if (data->arg.new_lock) {
6106 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
6107 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) {
6108 rpc_restart_call_prepare(task);
6112 if (data->arg.new_lock_owner != 0) {
6113 nfs_confirm_seqid(&lsp->ls_seqid, 0);
6114 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
6115 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
6116 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
6117 rpc_restart_call_prepare(task);
6119 case -NFS4ERR_BAD_STATEID:
6120 case -NFS4ERR_OLD_STATEID:
6121 case -NFS4ERR_STALE_STATEID:
6122 case -NFS4ERR_EXPIRED:
6123 if (data->arg.new_lock_owner != 0) {
6124 if (!nfs4_stateid_match(&data->arg.open_stateid,
6125 &lsp->ls_state->open_stateid))
6126 rpc_restart_call_prepare(task);
6127 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
6129 rpc_restart_call_prepare(task);
6131 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
6134 static void nfs4_lock_release(void *calldata)
6136 struct nfs4_lockdata *data = calldata;
6138 dprintk("%s: begin!\n", __func__);
6139 nfs_free_seqid(data->arg.open_seqid);
6140 if (data->cancelled != 0) {
6141 struct rpc_task *task;
6142 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
6143 data->arg.lock_seqid);
6145 rpc_put_task_async(task);
6146 dprintk("%s: cancelling lock!\n", __func__);
6148 nfs_free_seqid(data->arg.lock_seqid);
6149 nfs4_put_lock_state(data->lsp);
6150 put_nfs_open_context(data->ctx);
6152 dprintk("%s: done!\n", __func__);
6155 static const struct rpc_call_ops nfs4_lock_ops = {
6156 .rpc_call_prepare = nfs4_lock_prepare,
6157 .rpc_call_done = nfs4_lock_done,
6158 .rpc_release = nfs4_lock_release,
6161 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
6164 case -NFS4ERR_ADMIN_REVOKED:
6165 case -NFS4ERR_EXPIRED:
6166 case -NFS4ERR_BAD_STATEID:
6167 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
6168 if (new_lock_owner != 0 ||
6169 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
6170 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
6172 case -NFS4ERR_STALE_STATEID:
6173 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
6174 nfs4_schedule_lease_recovery(server->nfs_client);
6178 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
6180 struct nfs4_lockdata *data;
6181 struct rpc_task *task;
6182 struct rpc_message msg = {
6183 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
6184 .rpc_cred = state->owner->so_cred,
6186 struct rpc_task_setup task_setup_data = {
6187 .rpc_client = NFS_CLIENT(state->inode),
6188 .rpc_message = &msg,
6189 .callback_ops = &nfs4_lock_ops,
6190 .workqueue = nfsiod_workqueue,
6191 .flags = RPC_TASK_ASYNC,
6195 dprintk("%s: begin!\n", __func__);
6196 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
6197 fl->fl_u.nfs4_fl.owner,
6198 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
6202 data->arg.block = 1;
6203 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
6204 msg.rpc_argp = &data->arg;
6205 msg.rpc_resp = &data->res;
6206 task_setup_data.callback_data = data;
6207 if (recovery_type > NFS_LOCK_NEW) {
6208 if (recovery_type == NFS_LOCK_RECLAIM)
6209 data->arg.reclaim = NFS_LOCK_RECLAIM;
6210 nfs4_set_sequence_privileged(&data->arg.seq_args);
6212 data->arg.new_lock = 1;
6213 task = rpc_run_task(&task_setup_data);
6215 return PTR_ERR(task);
6216 ret = rpc_wait_for_completion_task(task);
6218 ret = data->rpc_status;
6220 nfs4_handle_setlk_error(data->server, data->lsp,
6221 data->arg.new_lock_owner, ret);
6223 data->cancelled = 1;
6225 dprintk("%s: done, ret = %d!\n", __func__, ret);
6226 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
6230 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
6232 struct nfs_server *server = NFS_SERVER(state->inode);
6233 struct nfs4_exception exception = {
6234 .inode = state->inode,
6239 /* Cache the lock if possible... */
6240 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6242 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
6243 if (err != -NFS4ERR_DELAY)
6245 nfs4_handle_exception(server, err, &exception);
6246 } while (exception.retry);
6250 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
6252 struct nfs_server *server = NFS_SERVER(state->inode);
6253 struct nfs4_exception exception = {
6254 .inode = state->inode,
6258 err = nfs4_set_lock_state(state, request);
6261 if (!recover_lost_locks) {
6262 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
6266 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6268 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
6272 case -NFS4ERR_GRACE:
6273 case -NFS4ERR_DELAY:
6274 nfs4_handle_exception(server, err, &exception);
6277 } while (exception.retry);
6282 #if defined(CONFIG_NFS_V4_1)
6283 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6285 struct nfs4_lock_state *lsp;
6288 status = nfs4_set_lock_state(state, request);
6291 lsp = request->fl_u.nfs4_fl.owner;
6292 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) ||
6293 test_bit(NFS_LOCK_LOST, &lsp->ls_flags))
6295 return nfs4_lock_expired(state, request);
6299 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6301 struct nfs_inode *nfsi = NFS_I(state->inode);
6302 struct nfs4_state_owner *sp = state->owner;
6303 unsigned char fl_flags = request->fl_flags;
6306 request->fl_flags |= FL_ACCESS;
6307 status = locks_lock_inode_wait(state->inode, request);
6310 mutex_lock(&sp->so_delegreturn_mutex);
6311 down_read(&nfsi->rwsem);
6312 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
6313 /* Yes: cache locks! */
6314 /* ...but avoid races with delegation recall... */
6315 request->fl_flags = fl_flags & ~FL_SLEEP;
6316 status = locks_lock_inode_wait(state->inode, request);
6317 up_read(&nfsi->rwsem);
6318 mutex_unlock(&sp->so_delegreturn_mutex);
6321 up_read(&nfsi->rwsem);
6322 mutex_unlock(&sp->so_delegreturn_mutex);
6323 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6325 request->fl_flags = fl_flags;
6329 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6331 struct nfs4_exception exception = {
6333 .inode = state->inode,
6338 err = _nfs4_proc_setlk(state, cmd, request);
6339 if (err == -NFS4ERR_DENIED)
6341 err = nfs4_handle_exception(NFS_SERVER(state->inode),
6343 } while (exception.retry);
6347 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
6348 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
6351 nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd,
6352 struct file_lock *request)
6354 int status = -ERESTARTSYS;
6355 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6357 while(!signalled()) {
6358 status = nfs4_proc_setlk(state, cmd, request);
6359 if ((status != -EAGAIN) || IS_SETLK(cmd))
6361 freezable_schedule_timeout_interruptible(timeout);
6363 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout);
6364 status = -ERESTARTSYS;
6369 #ifdef CONFIG_NFS_V4_1
6370 struct nfs4_lock_waiter {
6371 struct task_struct *task;
6372 struct inode *inode;
6373 struct nfs_lowner *owner;
6378 nfs4_wake_lock_waiter(wait_queue_t *wait, unsigned int mode, int flags, void *key)
6381 struct cb_notify_lock_args *cbnl = key;
6382 struct nfs4_lock_waiter *waiter = wait->private;
6383 struct nfs_lowner *lowner = &cbnl->cbnl_owner,
6384 *wowner = waiter->owner;
6386 /* Only wake if the callback was for the same owner */
6387 if (lowner->clientid != wowner->clientid ||
6388 lowner->id != wowner->id ||
6389 lowner->s_dev != wowner->s_dev)
6392 /* Make sure it's for the right inode */
6393 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh))
6396 waiter->notified = true;
6398 /* override "private" so we can use default_wake_function */
6399 wait->private = waiter->task;
6400 ret = autoremove_wake_function(wait, mode, flags, key);
6401 wait->private = waiter;
6406 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6408 int status = -ERESTARTSYS;
6409 unsigned long flags;
6410 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner;
6411 struct nfs_server *server = NFS_SERVER(state->inode);
6412 struct nfs_client *clp = server->nfs_client;
6413 wait_queue_head_t *q = &clp->cl_lock_waitq;
6414 struct nfs_lowner owner = { .clientid = clp->cl_clientid,
6415 .id = lsp->ls_seqid.owner_id,
6416 .s_dev = server->s_dev };
6417 struct nfs4_lock_waiter waiter = { .task = current,
6418 .inode = state->inode,
6420 .notified = false };
6423 /* Don't bother with waitqueue if we don't expect a callback */
6424 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags))
6425 return nfs4_retry_setlk_simple(state, cmd, request);
6428 wait.private = &waiter;
6429 wait.func = nfs4_wake_lock_waiter;
6430 add_wait_queue(q, &wait);
6432 while(!signalled()) {
6433 status = nfs4_proc_setlk(state, cmd, request);
6434 if ((status != -EAGAIN) || IS_SETLK(cmd))
6437 status = -ERESTARTSYS;
6438 spin_lock_irqsave(&q->lock, flags);
6439 if (waiter.notified) {
6440 spin_unlock_irqrestore(&q->lock, flags);
6443 set_current_state(TASK_INTERRUPTIBLE);
6444 spin_unlock_irqrestore(&q->lock, flags);
6446 freezable_schedule_timeout_interruptible(NFS4_LOCK_MAXTIMEOUT);
6449 finish_wait(q, &wait);
6452 #else /* !CONFIG_NFS_V4_1 */
6454 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6456 return nfs4_retry_setlk_simple(state, cmd, request);
6461 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6463 struct nfs_open_context *ctx;
6464 struct nfs4_state *state;
6467 /* verify open state */
6468 ctx = nfs_file_open_context(filp);
6471 if (IS_GETLK(cmd)) {
6473 return nfs4_proc_getlk(state, F_GETLK, request);
6477 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6480 if (request->fl_type == F_UNLCK) {
6482 return nfs4_proc_unlck(state, cmd, request);
6489 if ((request->fl_flags & FL_POSIX) &&
6490 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6493 status = nfs4_set_lock_state(state, request);
6497 return nfs4_retry_setlk(state, cmd, request);
6500 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
6502 struct nfs_server *server = NFS_SERVER(state->inode);
6505 err = nfs4_set_lock_state(state, fl);
6508 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
6509 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
6512 struct nfs_release_lockowner_data {
6513 struct nfs4_lock_state *lsp;
6514 struct nfs_server *server;
6515 struct nfs_release_lockowner_args args;
6516 struct nfs_release_lockowner_res res;
6517 unsigned long timestamp;
6520 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6522 struct nfs_release_lockowner_data *data = calldata;
6523 struct nfs_server *server = data->server;
6524 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
6525 &data->res.seq_res, task);
6526 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6527 data->timestamp = jiffies;
6530 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6532 struct nfs_release_lockowner_data *data = calldata;
6533 struct nfs_server *server = data->server;
6535 nfs40_sequence_done(task, &data->res.seq_res);
6537 switch (task->tk_status) {
6539 renew_lease(server, data->timestamp);
6541 case -NFS4ERR_STALE_CLIENTID:
6542 case -NFS4ERR_EXPIRED:
6543 nfs4_schedule_lease_recovery(server->nfs_client);
6545 case -NFS4ERR_LEASE_MOVED:
6546 case -NFS4ERR_DELAY:
6547 if (nfs4_async_handle_error(task, server,
6548 NULL, NULL) == -EAGAIN)
6549 rpc_restart_call_prepare(task);
6553 static void nfs4_release_lockowner_release(void *calldata)
6555 struct nfs_release_lockowner_data *data = calldata;
6556 nfs4_free_lock_state(data->server, data->lsp);
6560 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
6561 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6562 .rpc_call_done = nfs4_release_lockowner_done,
6563 .rpc_release = nfs4_release_lockowner_release,
6567 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
6569 struct nfs_release_lockowner_data *data;
6570 struct rpc_message msg = {
6571 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6574 if (server->nfs_client->cl_mvops->minor_version != 0)
6577 data = kmalloc(sizeof(*data), GFP_NOFS);
6581 data->server = server;
6582 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6583 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6584 data->args.lock_owner.s_dev = server->s_dev;
6586 msg.rpc_argp = &data->args;
6587 msg.rpc_resp = &data->res;
6588 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
6589 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
6592 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6594 static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
6595 struct dentry *unused, struct inode *inode,
6596 const char *key, const void *buf,
6597 size_t buflen, int flags)
6599 return nfs4_proc_set_acl(inode, buf, buflen);
6602 static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
6603 struct dentry *unused, struct inode *inode,
6604 const char *key, void *buf, size_t buflen)
6606 return nfs4_proc_get_acl(inode, buf, buflen);
6609 static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
6611 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
6614 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
6616 static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
6617 struct dentry *unused, struct inode *inode,
6618 const char *key, const void *buf,
6619 size_t buflen, int flags)
6621 if (security_ismaclabel(key))
6622 return nfs4_set_security_label(inode, buf, buflen);
6627 static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
6628 struct dentry *unused, struct inode *inode,
6629 const char *key, void *buf, size_t buflen)
6631 if (security_ismaclabel(key))
6632 return nfs4_get_security_label(inode, buf, buflen);
6637 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6641 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
6642 len = security_inode_listsecurity(inode, list, list_len);
6643 if (list_len && len > list_len)
6649 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6650 .prefix = XATTR_SECURITY_PREFIX,
6651 .get = nfs4_xattr_get_nfs4_label,
6652 .set = nfs4_xattr_set_nfs4_label,
6658 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6666 * nfs_fhget will use either the mounted_on_fileid or the fileid
6668 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6670 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6671 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6672 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
6673 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
6676 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
6677 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
6678 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6682 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6683 const struct qstr *name,
6684 struct nfs4_fs_locations *fs_locations,
6687 struct nfs_server *server = NFS_SERVER(dir);
6689 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6691 struct nfs4_fs_locations_arg args = {
6692 .dir_fh = NFS_FH(dir),
6697 struct nfs4_fs_locations_res res = {
6698 .fs_locations = fs_locations,
6700 struct rpc_message msg = {
6701 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6707 dprintk("%s: start\n", __func__);
6709 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6710 * is not supported */
6711 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6712 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6714 bitmask[0] |= FATTR4_WORD0_FILEID;
6716 nfs_fattr_init(&fs_locations->fattr);
6717 fs_locations->server = server;
6718 fs_locations->nlocations = 0;
6719 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
6720 dprintk("%s: returned status = %d\n", __func__, status);
6724 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6725 const struct qstr *name,
6726 struct nfs4_fs_locations *fs_locations,
6729 struct nfs4_exception exception = { };
6732 err = _nfs4_proc_fs_locations(client, dir, name,
6733 fs_locations, page);
6734 trace_nfs4_get_fs_locations(dir, name, err);
6735 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6737 } while (exception.retry);
6742 * This operation also signals the server that this client is
6743 * performing migration recovery. The server can stop returning
6744 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6745 * appended to this compound to identify the client ID which is
6746 * performing recovery.
6748 static int _nfs40_proc_get_locations(struct inode *inode,
6749 struct nfs4_fs_locations *locations,
6750 struct page *page, struct rpc_cred *cred)
6752 struct nfs_server *server = NFS_SERVER(inode);
6753 struct rpc_clnt *clnt = server->client;
6755 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6757 struct nfs4_fs_locations_arg args = {
6758 .clientid = server->nfs_client->cl_clientid,
6759 .fh = NFS_FH(inode),
6762 .migration = 1, /* skip LOOKUP */
6763 .renew = 1, /* append RENEW */
6765 struct nfs4_fs_locations_res res = {
6766 .fs_locations = locations,
6770 struct rpc_message msg = {
6771 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6776 unsigned long now = jiffies;
6779 nfs_fattr_init(&locations->fattr);
6780 locations->server = server;
6781 locations->nlocations = 0;
6783 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6784 nfs4_set_sequence_privileged(&args.seq_args);
6785 status = nfs4_call_sync_sequence(clnt, server, &msg,
6786 &args.seq_args, &res.seq_res);
6790 renew_lease(server, now);
6794 #ifdef CONFIG_NFS_V4_1
6797 * This operation also signals the server that this client is
6798 * performing migration recovery. The server can stop asserting
6799 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6800 * performing this operation is identified in the SEQUENCE
6801 * operation in this compound.
6803 * When the client supports GETATTR(fs_locations_info), it can
6804 * be plumbed in here.
6806 static int _nfs41_proc_get_locations(struct inode *inode,
6807 struct nfs4_fs_locations *locations,
6808 struct page *page, struct rpc_cred *cred)
6810 struct nfs_server *server = NFS_SERVER(inode);
6811 struct rpc_clnt *clnt = server->client;
6813 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6815 struct nfs4_fs_locations_arg args = {
6816 .fh = NFS_FH(inode),
6819 .migration = 1, /* skip LOOKUP */
6821 struct nfs4_fs_locations_res res = {
6822 .fs_locations = locations,
6825 struct rpc_message msg = {
6826 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6833 nfs_fattr_init(&locations->fattr);
6834 locations->server = server;
6835 locations->nlocations = 0;
6837 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6838 nfs4_set_sequence_privileged(&args.seq_args);
6839 status = nfs4_call_sync_sequence(clnt, server, &msg,
6840 &args.seq_args, &res.seq_res);
6841 if (status == NFS4_OK &&
6842 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6843 status = -NFS4ERR_LEASE_MOVED;
6847 #endif /* CONFIG_NFS_V4_1 */
6850 * nfs4_proc_get_locations - discover locations for a migrated FSID
6851 * @inode: inode on FSID that is migrating
6852 * @locations: result of query
6854 * @cred: credential to use for this operation
6856 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6857 * operation failed, or a negative errno if a local error occurred.
6859 * On success, "locations" is filled in, but if the server has
6860 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6863 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6864 * from this client that require migration recovery.
6866 int nfs4_proc_get_locations(struct inode *inode,
6867 struct nfs4_fs_locations *locations,
6868 struct page *page, struct rpc_cred *cred)
6870 struct nfs_server *server = NFS_SERVER(inode);
6871 struct nfs_client *clp = server->nfs_client;
6872 const struct nfs4_mig_recovery_ops *ops =
6873 clp->cl_mvops->mig_recovery_ops;
6874 struct nfs4_exception exception = { };
6877 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6878 (unsigned long long)server->fsid.major,
6879 (unsigned long long)server->fsid.minor,
6881 nfs_display_fhandle(NFS_FH(inode), __func__);
6884 status = ops->get_locations(inode, locations, page, cred);
6885 if (status != -NFS4ERR_DELAY)
6887 nfs4_handle_exception(server, status, &exception);
6888 } while (exception.retry);
6893 * This operation also signals the server that this client is
6894 * performing "lease moved" recovery. The server can stop
6895 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6896 * is appended to this compound to identify the client ID which is
6897 * performing recovery.
6899 static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6901 struct nfs_server *server = NFS_SERVER(inode);
6902 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6903 struct rpc_clnt *clnt = server->client;
6904 struct nfs4_fsid_present_arg args = {
6905 .fh = NFS_FH(inode),
6906 .clientid = clp->cl_clientid,
6907 .renew = 1, /* append RENEW */
6909 struct nfs4_fsid_present_res res = {
6912 struct rpc_message msg = {
6913 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6918 unsigned long now = jiffies;
6921 res.fh = nfs_alloc_fhandle();
6925 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6926 nfs4_set_sequence_privileged(&args.seq_args);
6927 status = nfs4_call_sync_sequence(clnt, server, &msg,
6928 &args.seq_args, &res.seq_res);
6929 nfs_free_fhandle(res.fh);
6933 do_renew_lease(clp, now);
6937 #ifdef CONFIG_NFS_V4_1
6940 * This operation also signals the server that this client is
6941 * performing "lease moved" recovery. The server can stop asserting
6942 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6943 * this operation is identified in the SEQUENCE operation in this
6946 static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6948 struct nfs_server *server = NFS_SERVER(inode);
6949 struct rpc_clnt *clnt = server->client;
6950 struct nfs4_fsid_present_arg args = {
6951 .fh = NFS_FH(inode),
6953 struct nfs4_fsid_present_res res = {
6955 struct rpc_message msg = {
6956 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6963 res.fh = nfs_alloc_fhandle();
6967 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6968 nfs4_set_sequence_privileged(&args.seq_args);
6969 status = nfs4_call_sync_sequence(clnt, server, &msg,
6970 &args.seq_args, &res.seq_res);
6971 nfs_free_fhandle(res.fh);
6972 if (status == NFS4_OK &&
6973 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6974 status = -NFS4ERR_LEASE_MOVED;
6978 #endif /* CONFIG_NFS_V4_1 */
6981 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6982 * @inode: inode on FSID to check
6983 * @cred: credential to use for this operation
6985 * Server indicates whether the FSID is present, moved, or not
6986 * recognized. This operation is necessary to clear a LEASE_MOVED
6987 * condition for this client ID.
6989 * Returns NFS4_OK if the FSID is present on this server,
6990 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6991 * NFS4ERR code if some error occurred on the server, or a
6992 * negative errno if a local failure occurred.
6994 int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6996 struct nfs_server *server = NFS_SERVER(inode);
6997 struct nfs_client *clp = server->nfs_client;
6998 const struct nfs4_mig_recovery_ops *ops =
6999 clp->cl_mvops->mig_recovery_ops;
7000 struct nfs4_exception exception = { };
7003 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
7004 (unsigned long long)server->fsid.major,
7005 (unsigned long long)server->fsid.minor,
7007 nfs_display_fhandle(NFS_FH(inode), __func__);
7010 status = ops->fsid_present(inode, cred);
7011 if (status != -NFS4ERR_DELAY)
7013 nfs4_handle_exception(server, status, &exception);
7014 } while (exception.retry);
7019 * If 'use_integrity' is true and the state managment nfs_client
7020 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
7021 * and the machine credential as per RFC3530bis and RFC5661 Security
7022 * Considerations sections. Otherwise, just use the user cred with the
7023 * filesystem's rpc_client.
7025 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
7028 struct nfs4_secinfo_arg args = {
7029 .dir_fh = NFS_FH(dir),
7032 struct nfs4_secinfo_res res = {
7035 struct rpc_message msg = {
7036 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
7040 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7041 struct rpc_cred *cred = NULL;
7043 if (use_integrity) {
7044 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7045 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
7046 msg.rpc_cred = cred;
7049 dprintk("NFS call secinfo %s\n", name->name);
7051 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
7052 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
7054 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
7056 dprintk("NFS reply secinfo: %d\n", status);
7064 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
7065 struct nfs4_secinfo_flavors *flavors)
7067 struct nfs4_exception exception = { };
7070 err = -NFS4ERR_WRONGSEC;
7072 /* try to use integrity protection with machine cred */
7073 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
7074 err = _nfs4_proc_secinfo(dir, name, flavors, true);
7077 * if unable to use integrity protection, or SECINFO with
7078 * integrity protection returns NFS4ERR_WRONGSEC (which is
7079 * disallowed by spec, but exists in deployed servers) use
7080 * the current filesystem's rpc_client and the user cred.
7082 if (err == -NFS4ERR_WRONGSEC)
7083 err = _nfs4_proc_secinfo(dir, name, flavors, false);
7085 trace_nfs4_secinfo(dir, name, err);
7086 err = nfs4_handle_exception(NFS_SERVER(dir), err,
7088 } while (exception.retry);
7092 #ifdef CONFIG_NFS_V4_1
7094 * Check the exchange flags returned by the server for invalid flags, having
7095 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
7098 static int nfs4_check_cl_exchange_flags(u32 flags)
7100 if (flags & ~EXCHGID4_FLAG_MASK_R)
7102 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
7103 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
7105 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
7109 return -NFS4ERR_INVAL;
7113 nfs41_same_server_scope(struct nfs41_server_scope *a,
7114 struct nfs41_server_scope *b)
7116 if (a->server_scope_sz != b->server_scope_sz)
7118 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0;
7122 nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
7126 static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
7127 .rpc_call_done = &nfs4_bind_one_conn_to_session_done,
7131 * nfs4_proc_bind_one_conn_to_session()
7133 * The 4.1 client currently uses the same TCP connection for the
7134 * fore and backchannel.
7137 int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
7138 struct rpc_xprt *xprt,
7139 struct nfs_client *clp,
7140 struct rpc_cred *cred)
7143 struct nfs41_bind_conn_to_session_args args = {
7145 .dir = NFS4_CDFC4_FORE_OR_BOTH,
7147 struct nfs41_bind_conn_to_session_res res;
7148 struct rpc_message msg = {
7150 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
7155 struct rpc_task_setup task_setup_data = {
7158 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
7159 .rpc_message = &msg,
7160 .flags = RPC_TASK_TIMEOUT,
7162 struct rpc_task *task;
7164 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
7165 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
7166 args.dir = NFS4_CDFC4_FORE;
7168 /* Do not set the backchannel flag unless this is clnt->cl_xprt */
7169 if (xprt != rcu_access_pointer(clnt->cl_xprt))
7170 args.dir = NFS4_CDFC4_FORE;
7172 task = rpc_run_task(&task_setup_data);
7173 if (!IS_ERR(task)) {
7174 status = task->tk_status;
7177 status = PTR_ERR(task);
7178 trace_nfs4_bind_conn_to_session(clp, status);
7180 if (memcmp(res.sessionid.data,
7181 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
7182 dprintk("NFS: %s: Session ID mismatch\n", __func__);
7185 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7186 dprintk("NFS: %s: Unexpected direction from server\n",
7190 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7191 dprintk("NFS: %s: Server returned RDMA mode = true\n",
7200 struct rpc_bind_conn_calldata {
7201 struct nfs_client *clp;
7202 struct rpc_cred *cred;
7206 nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
7207 struct rpc_xprt *xprt,
7210 struct rpc_bind_conn_calldata *p = calldata;
7212 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
7215 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7217 struct rpc_bind_conn_calldata data = {
7221 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
7222 nfs4_proc_bind_conn_to_session_callback, &data);
7226 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
7227 * and operations we'd like to see to enable certain features in the allow map
7229 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
7230 .how = SP4_MACH_CRED,
7231 .enforce.u.words = {
7232 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7233 1 << (OP_EXCHANGE_ID - 32) |
7234 1 << (OP_CREATE_SESSION - 32) |
7235 1 << (OP_DESTROY_SESSION - 32) |
7236 1 << (OP_DESTROY_CLIENTID - 32)
7239 [0] = 1 << (OP_CLOSE) |
7240 1 << (OP_OPEN_DOWNGRADE) |
7242 1 << (OP_DELEGRETURN) |
7244 [1] = 1 << (OP_SECINFO - 32) |
7245 1 << (OP_SECINFO_NO_NAME - 32) |
7246 1 << (OP_LAYOUTRETURN - 32) |
7247 1 << (OP_TEST_STATEID - 32) |
7248 1 << (OP_FREE_STATEID - 32) |
7249 1 << (OP_WRITE - 32)
7254 * Select the state protection mode for client `clp' given the server results
7255 * from exchange_id in `sp'.
7257 * Returns 0 on success, negative errno otherwise.
7259 static int nfs4_sp4_select_mode(struct nfs_client *clp,
7260 struct nfs41_state_protection *sp)
7262 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
7263 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7264 1 << (OP_EXCHANGE_ID - 32) |
7265 1 << (OP_CREATE_SESSION - 32) |
7266 1 << (OP_DESTROY_SESSION - 32) |
7267 1 << (OP_DESTROY_CLIENTID - 32)
7271 if (sp->how == SP4_MACH_CRED) {
7272 /* Print state protect result */
7273 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
7274 for (i = 0; i <= LAST_NFS4_OP; i++) {
7275 if (test_bit(i, sp->enforce.u.longs))
7276 dfprintk(MOUNT, " enforce op %d\n", i);
7277 if (test_bit(i, sp->allow.u.longs))
7278 dfprintk(MOUNT, " allow op %d\n", i);
7281 /* make sure nothing is on enforce list that isn't supported */
7282 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
7283 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
7284 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7290 * Minimal mode - state operations are allowed to use machine
7291 * credential. Note this already happens by default, so the
7292 * client doesn't have to do anything more than the negotiation.
7294 * NOTE: we don't care if EXCHANGE_ID is in the list -
7295 * we're already using the machine cred for exchange_id
7296 * and will never use a different cred.
7298 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
7299 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
7300 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
7301 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
7302 dfprintk(MOUNT, "sp4_mach_cred:\n");
7303 dfprintk(MOUNT, " minimal mode enabled\n");
7304 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
7306 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7310 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
7311 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
7312 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
7313 test_bit(OP_LOCKU, sp->allow.u.longs)) {
7314 dfprintk(MOUNT, " cleanup mode enabled\n");
7315 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
7318 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
7319 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
7320 set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP,
7321 &clp->cl_sp4_flags);
7324 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
7325 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
7326 dfprintk(MOUNT, " secinfo mode enabled\n");
7327 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
7330 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
7331 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
7332 dfprintk(MOUNT, " stateid mode enabled\n");
7333 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
7336 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
7337 dfprintk(MOUNT, " write mode enabled\n");
7338 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
7341 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
7342 dfprintk(MOUNT, " commit mode enabled\n");
7343 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
7350 struct nfs41_exchange_id_data {
7351 struct nfs41_exchange_id_res res;
7352 struct nfs41_exchange_id_args args;
7353 struct rpc_xprt *xprt;
7357 static void nfs4_exchange_id_done(struct rpc_task *task, void *data)
7359 struct nfs41_exchange_id_data *cdata =
7360 (struct nfs41_exchange_id_data *)data;
7361 struct nfs_client *clp = cdata->args.client;
7362 int status = task->tk_status;
7364 trace_nfs4_exchange_id(clp, status);
7367 status = nfs4_check_cl_exchange_flags(cdata->res.flags);
7369 if (cdata->xprt && status == 0) {
7370 status = nfs4_detect_session_trunking(clp, &cdata->res,
7376 status = nfs4_sp4_select_mode(clp, &cdata->res.state_protect);
7379 clp->cl_clientid = cdata->res.clientid;
7380 clp->cl_exchange_flags = cdata->res.flags;
7381 /* Client ID is not confirmed */
7382 if (!(cdata->res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
7383 clear_bit(NFS4_SESSION_ESTABLISHED,
7384 &clp->cl_session->session_state);
7385 clp->cl_seqid = cdata->res.seqid;
7388 kfree(clp->cl_serverowner);
7389 clp->cl_serverowner = cdata->res.server_owner;
7390 cdata->res.server_owner = NULL;
7392 /* use the most recent implementation id */
7393 kfree(clp->cl_implid);
7394 clp->cl_implid = cdata->res.impl_id;
7395 cdata->res.impl_id = NULL;
7397 if (clp->cl_serverscope != NULL &&
7398 !nfs41_same_server_scope(clp->cl_serverscope,
7399 cdata->res.server_scope)) {
7400 dprintk("%s: server_scope mismatch detected\n",
7402 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
7403 kfree(clp->cl_serverscope);
7404 clp->cl_serverscope = NULL;
7407 if (clp->cl_serverscope == NULL) {
7408 clp->cl_serverscope = cdata->res.server_scope;
7409 cdata->res.server_scope = NULL;
7411 /* Save the EXCHANGE_ID verifier session trunk tests */
7412 memcpy(clp->cl_confirm.data, cdata->args.verifier->data,
7413 sizeof(clp->cl_confirm.data));
7416 cdata->rpc_status = status;
7420 static void nfs4_exchange_id_release(void *data)
7422 struct nfs41_exchange_id_data *cdata =
7423 (struct nfs41_exchange_id_data *)data;
7426 xprt_put(cdata->xprt);
7427 rpc_clnt_xprt_switch_put(cdata->args.client->cl_rpcclient);
7429 nfs_put_client(cdata->args.client);
7430 kfree(cdata->res.impl_id);
7431 kfree(cdata->res.server_scope);
7432 kfree(cdata->res.server_owner);
7436 static const struct rpc_call_ops nfs4_exchange_id_call_ops = {
7437 .rpc_call_done = nfs4_exchange_id_done,
7438 .rpc_release = nfs4_exchange_id_release,
7442 * _nfs4_proc_exchange_id()
7444 * Wrapper for EXCHANGE_ID operation.
7446 static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
7447 u32 sp4_how, struct rpc_xprt *xprt)
7449 nfs4_verifier verifier;
7450 struct rpc_message msg = {
7451 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
7454 struct rpc_task_setup task_setup_data = {
7455 .rpc_client = clp->cl_rpcclient,
7456 .callback_ops = &nfs4_exchange_id_call_ops,
7457 .rpc_message = &msg,
7458 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
7460 struct nfs41_exchange_id_data *calldata;
7461 struct rpc_task *task;
7464 if (!atomic_inc_not_zero(&clp->cl_count))
7467 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7469 nfs_put_client(clp);
7474 nfs4_init_boot_verifier(clp, &verifier);
7476 status = nfs4_init_uniform_client_string(clp);
7480 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
7483 if (unlikely(calldata->res.server_owner == NULL))
7486 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
7488 if (unlikely(calldata->res.server_scope == NULL))
7489 goto out_server_owner;
7491 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
7492 if (unlikely(calldata->res.impl_id == NULL))
7493 goto out_server_scope;
7497 calldata->args.state_protect.how = SP4_NONE;
7501 calldata->args.state_protect = nfs4_sp4_mach_cred_request;
7511 calldata->xprt = xprt;
7512 task_setup_data.rpc_xprt = xprt;
7513 task_setup_data.flags =
7514 RPC_TASK_SOFT|RPC_TASK_SOFTCONN|RPC_TASK_ASYNC;
7515 calldata->args.verifier = &clp->cl_confirm;
7517 calldata->args.verifier = &verifier;
7519 calldata->args.client = clp;
7520 #ifdef CONFIG_NFS_V4_1_MIGRATION
7521 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7522 EXCHGID4_FLAG_BIND_PRINC_STATEID |
7523 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
7525 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7526 EXCHGID4_FLAG_BIND_PRINC_STATEID,
7528 msg.rpc_argp = &calldata->args;
7529 msg.rpc_resp = &calldata->res;
7530 task_setup_data.callback_data = calldata;
7532 task = rpc_run_task(&task_setup_data);
7534 return PTR_ERR(task);
7537 status = rpc_wait_for_completion_task(task);
7539 status = calldata->rpc_status;
7540 } else /* session trunking test */
7541 status = calldata->rpc_status;
7548 kfree(calldata->res.impl_id);
7550 kfree(calldata->res.server_scope);
7552 kfree(calldata->res.server_owner);
7555 nfs_put_client(clp);
7560 * nfs4_proc_exchange_id()
7562 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7564 * Since the clientid has expired, all compounds using sessions
7565 * associated with the stale clientid will be returning
7566 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7567 * be in some phase of session reset.
7569 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7571 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7573 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7576 /* try SP4_MACH_CRED if krb5i/p */
7577 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7578 authflavor == RPC_AUTH_GSS_KRB5P) {
7579 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED, NULL);
7585 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE, NULL);
7589 * nfs4_test_session_trunk
7591 * This is an add_xprt_test() test function called from
7592 * rpc_clnt_setup_test_and_add_xprt.
7594 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt
7595 * and is dereferrenced in nfs4_exchange_id_release
7597 * Upon success, add the new transport to the rpc_clnt
7599 * @clnt: struct rpc_clnt to get new transport
7600 * @xprt: the rpc_xprt to test
7601 * @data: call data for _nfs4_proc_exchange_id.
7603 int nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt,
7606 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data;
7609 dprintk("--> %s try %s\n", __func__,
7610 xprt->address_strings[RPC_DISPLAY_ADDR]);
7612 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED);
7614 /* Test connection for session trunking. Async exchange_id call */
7615 return _nfs4_proc_exchange_id(adata->clp, adata->cred, sp4_how, xprt);
7617 EXPORT_SYMBOL_GPL(nfs4_test_session_trunk);
7619 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7620 struct rpc_cred *cred)
7622 struct rpc_message msg = {
7623 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7629 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7630 trace_nfs4_destroy_clientid(clp, status);
7632 dprintk("NFS: Got error %d from the server %s on "
7633 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7637 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7638 struct rpc_cred *cred)
7643 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7644 ret = _nfs4_proc_destroy_clientid(clp, cred);
7646 case -NFS4ERR_DELAY:
7647 case -NFS4ERR_CLIENTID_BUSY:
7657 int nfs4_destroy_clientid(struct nfs_client *clp)
7659 struct rpc_cred *cred;
7662 if (clp->cl_mvops->minor_version < 1)
7664 if (clp->cl_exchange_flags == 0)
7666 if (clp->cl_preserve_clid)
7668 cred = nfs4_get_clid_cred(clp);
7669 ret = nfs4_proc_destroy_clientid(clp, cred);
7674 case -NFS4ERR_STALE_CLIENTID:
7675 clp->cl_exchange_flags = 0;
7681 struct nfs4_get_lease_time_data {
7682 struct nfs4_get_lease_time_args *args;
7683 struct nfs4_get_lease_time_res *res;
7684 struct nfs_client *clp;
7687 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7690 struct nfs4_get_lease_time_data *data =
7691 (struct nfs4_get_lease_time_data *)calldata;
7693 dprintk("--> %s\n", __func__);
7694 /* just setup sequence, do not trigger session recovery
7695 since we're invoked within one */
7696 nfs4_setup_sequence(data->clp,
7697 &data->args->la_seq_args,
7698 &data->res->lr_seq_res,
7700 dprintk("<-- %s\n", __func__);
7704 * Called from nfs4_state_manager thread for session setup, so don't recover
7705 * from sequence operation or clientid errors.
7707 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7709 struct nfs4_get_lease_time_data *data =
7710 (struct nfs4_get_lease_time_data *)calldata;
7712 dprintk("--> %s\n", __func__);
7713 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7715 switch (task->tk_status) {
7716 case -NFS4ERR_DELAY:
7717 case -NFS4ERR_GRACE:
7718 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7719 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7720 task->tk_status = 0;
7722 case -NFS4ERR_RETRY_UNCACHED_REP:
7723 rpc_restart_call_prepare(task);
7726 dprintk("<-- %s\n", __func__);
7729 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
7730 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7731 .rpc_call_done = nfs4_get_lease_time_done,
7734 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7736 struct rpc_task *task;
7737 struct nfs4_get_lease_time_args args;
7738 struct nfs4_get_lease_time_res res = {
7739 .lr_fsinfo = fsinfo,
7741 struct nfs4_get_lease_time_data data = {
7746 struct rpc_message msg = {
7747 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7751 struct rpc_task_setup task_setup = {
7752 .rpc_client = clp->cl_rpcclient,
7753 .rpc_message = &msg,
7754 .callback_ops = &nfs4_get_lease_time_ops,
7755 .callback_data = &data,
7756 .flags = RPC_TASK_TIMEOUT,
7760 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
7761 nfs4_set_sequence_privileged(&args.la_seq_args);
7762 task = rpc_run_task(&task_setup);
7765 return PTR_ERR(task);
7767 status = task->tk_status;
7773 * Initialize the values to be used by the client in CREATE_SESSION
7774 * If nfs4_init_session set the fore channel request and response sizes,
7777 * Set the back channel max_resp_sz_cached to zero to force the client to
7778 * always set csa_cachethis to FALSE because the current implementation
7779 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7781 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args,
7782 struct rpc_clnt *clnt)
7784 unsigned int max_rqst_sz, max_resp_sz;
7785 unsigned int max_bc_payload = rpc_max_bc_payload(clnt);
7787 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7788 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
7790 /* Fore channel attributes */
7791 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7792 args->fc_attrs.max_resp_sz = max_resp_sz;
7793 args->fc_attrs.max_ops = NFS4_MAX_OPS;
7794 args->fc_attrs.max_reqs = max_session_slots;
7796 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
7797 "max_ops=%u max_reqs=%u\n",
7799 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
7800 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
7802 /* Back channel attributes */
7803 args->bc_attrs.max_rqst_sz = max_bc_payload;
7804 args->bc_attrs.max_resp_sz = max_bc_payload;
7805 args->bc_attrs.max_resp_sz_cached = 0;
7806 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7807 args->bc_attrs.max_reqs = min_t(unsigned short, max_session_cb_slots, 1);
7809 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7810 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7812 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7813 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7814 args->bc_attrs.max_reqs);
7817 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7818 struct nfs41_create_session_res *res)
7820 struct nfs4_channel_attrs *sent = &args->fc_attrs;
7821 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
7823 if (rcvd->max_resp_sz > sent->max_resp_sz)
7826 * Our requested max_ops is the minimum we need; we're not
7827 * prepared to break up compounds into smaller pieces than that.
7828 * So, no point even trying to continue if the server won't
7831 if (rcvd->max_ops < sent->max_ops)
7833 if (rcvd->max_reqs == 0)
7835 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7836 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
7840 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7841 struct nfs41_create_session_res *res)
7843 struct nfs4_channel_attrs *sent = &args->bc_attrs;
7844 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
7846 if (!(res->flags & SESSION4_BACK_CHAN))
7848 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7850 if (rcvd->max_resp_sz < sent->max_resp_sz)
7852 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7854 if (rcvd->max_ops > sent->max_ops)
7856 if (rcvd->max_reqs > sent->max_reqs)
7862 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7863 struct nfs41_create_session_res *res)
7867 ret = nfs4_verify_fore_channel_attrs(args, res);
7870 return nfs4_verify_back_channel_attrs(args, res);
7873 static void nfs4_update_session(struct nfs4_session *session,
7874 struct nfs41_create_session_res *res)
7876 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
7877 /* Mark client id and session as being confirmed */
7878 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7879 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
7880 session->flags = res->flags;
7881 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
7882 if (res->flags & SESSION4_BACK_CHAN)
7883 memcpy(&session->bc_attrs, &res->bc_attrs,
7884 sizeof(session->bc_attrs));
7887 static int _nfs4_proc_create_session(struct nfs_client *clp,
7888 struct rpc_cred *cred)
7890 struct nfs4_session *session = clp->cl_session;
7891 struct nfs41_create_session_args args = {
7893 .clientid = clp->cl_clientid,
7894 .seqid = clp->cl_seqid,
7895 .cb_program = NFS4_CALLBACK,
7897 struct nfs41_create_session_res res;
7899 struct rpc_message msg = {
7900 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7907 nfs4_init_channel_attrs(&args, clp->cl_rpcclient);
7908 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
7910 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7911 trace_nfs4_create_session(clp, status);
7914 case -NFS4ERR_STALE_CLIENTID:
7915 case -NFS4ERR_DELAY:
7924 /* Verify the session's negotiated channel_attrs values */
7925 status = nfs4_verify_channel_attrs(&args, &res);
7926 /* Increment the clientid slot sequence id */
7929 nfs4_update_session(session, &res);
7936 * Issues a CREATE_SESSION operation to the server.
7937 * It is the responsibility of the caller to verify the session is
7938 * expired before calling this routine.
7940 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
7944 struct nfs4_session *session = clp->cl_session;
7946 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7948 status = _nfs4_proc_create_session(clp, cred);
7952 /* Init or reset the session slot tables */
7953 status = nfs4_setup_session_slot_tables(session);
7954 dprintk("slot table setup returned %d\n", status);
7958 ptr = (unsigned *)&session->sess_id.data[0];
7959 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7960 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
7962 dprintk("<-- %s\n", __func__);
7967 * Issue the over-the-wire RPC DESTROY_SESSION.
7968 * The caller must serialize access to this routine.
7970 int nfs4_proc_destroy_session(struct nfs4_session *session,
7971 struct rpc_cred *cred)
7973 struct rpc_message msg = {
7974 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7975 .rpc_argp = session,
7980 dprintk("--> nfs4_proc_destroy_session\n");
7982 /* session is still being setup */
7983 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
7986 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7987 trace_nfs4_destroy_session(session->clp, status);
7990 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
7991 "Session has been destroyed regardless...\n", status);
7993 dprintk("<-- nfs4_proc_destroy_session\n");
7998 * Renew the cl_session lease.
8000 struct nfs4_sequence_data {
8001 struct nfs_client *clp;
8002 struct nfs4_sequence_args args;
8003 struct nfs4_sequence_res res;
8006 static void nfs41_sequence_release(void *data)
8008 struct nfs4_sequence_data *calldata = data;
8009 struct nfs_client *clp = calldata->clp;
8011 if (atomic_read(&clp->cl_count) > 1)
8012 nfs4_schedule_state_renewal(clp);
8013 nfs_put_client(clp);
8017 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8019 switch(task->tk_status) {
8020 case -NFS4ERR_DELAY:
8021 rpc_delay(task, NFS4_POLL_RETRY_MAX);
8024 nfs4_schedule_lease_recovery(clp);
8029 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
8031 struct nfs4_sequence_data *calldata = data;
8032 struct nfs_client *clp = calldata->clp;
8034 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
8037 trace_nfs4_sequence(clp, task->tk_status);
8038 if (task->tk_status < 0) {
8039 dprintk("%s ERROR %d\n", __func__, task->tk_status);
8040 if (atomic_read(&clp->cl_count) == 1)
8043 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
8044 rpc_restart_call_prepare(task);
8048 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
8050 dprintk("<-- %s\n", __func__);
8053 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
8055 struct nfs4_sequence_data *calldata = data;
8056 struct nfs_client *clp = calldata->clp;
8057 struct nfs4_sequence_args *args;
8058 struct nfs4_sequence_res *res;
8060 args = task->tk_msg.rpc_argp;
8061 res = task->tk_msg.rpc_resp;
8063 nfs4_setup_sequence(clp, args, res, task);
8066 static const struct rpc_call_ops nfs41_sequence_ops = {
8067 .rpc_call_done = nfs41_sequence_call_done,
8068 .rpc_call_prepare = nfs41_sequence_prepare,
8069 .rpc_release = nfs41_sequence_release,
8072 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
8073 struct rpc_cred *cred,
8076 struct nfs4_sequence_data *calldata;
8077 struct rpc_message msg = {
8078 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
8081 struct rpc_task_setup task_setup_data = {
8082 .rpc_client = clp->cl_rpcclient,
8083 .rpc_message = &msg,
8084 .callback_ops = &nfs41_sequence_ops,
8085 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
8088 if (!atomic_inc_not_zero(&clp->cl_count))
8089 return ERR_PTR(-EIO);
8090 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
8091 if (calldata == NULL) {
8092 nfs_put_client(clp);
8093 return ERR_PTR(-ENOMEM);
8095 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8097 nfs4_set_sequence_privileged(&calldata->args);
8098 msg.rpc_argp = &calldata->args;
8099 msg.rpc_resp = &calldata->res;
8100 calldata->clp = clp;
8101 task_setup_data.callback_data = calldata;
8103 return rpc_run_task(&task_setup_data);
8106 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
8108 struct rpc_task *task;
8111 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
8113 task = _nfs41_proc_sequence(clp, cred, false);
8115 ret = PTR_ERR(task);
8117 rpc_put_task_async(task);
8118 dprintk("<-- %s status=%d\n", __func__, ret);
8122 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
8124 struct rpc_task *task;
8127 task = _nfs41_proc_sequence(clp, cred, true);
8129 ret = PTR_ERR(task);
8132 ret = rpc_wait_for_completion_task(task);
8134 ret = task->tk_status;
8137 dprintk("<-- %s status=%d\n", __func__, ret);
8141 struct nfs4_reclaim_complete_data {
8142 struct nfs_client *clp;
8143 struct nfs41_reclaim_complete_args arg;
8144 struct nfs41_reclaim_complete_res res;
8147 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
8149 struct nfs4_reclaim_complete_data *calldata = data;
8151 nfs4_setup_sequence(calldata->clp,
8152 &calldata->arg.seq_args,
8153 &calldata->res.seq_res,
8157 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8159 switch(task->tk_status) {
8161 case -NFS4ERR_COMPLETE_ALREADY:
8162 case -NFS4ERR_WRONG_CRED: /* What to do here? */
8164 case -NFS4ERR_DELAY:
8165 rpc_delay(task, NFS4_POLL_RETRY_MAX);
8167 case -NFS4ERR_RETRY_UNCACHED_REP:
8169 case -NFS4ERR_BADSESSION:
8170 case -NFS4ERR_DEADSESSION:
8171 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
8172 nfs4_schedule_session_recovery(clp->cl_session,
8176 nfs4_schedule_lease_recovery(clp);
8181 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
8183 struct nfs4_reclaim_complete_data *calldata = data;
8184 struct nfs_client *clp = calldata->clp;
8185 struct nfs4_sequence_res *res = &calldata->res.seq_res;
8187 dprintk("--> %s\n", __func__);
8188 if (!nfs41_sequence_done(task, res))
8191 trace_nfs4_reclaim_complete(clp, task->tk_status);
8192 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
8193 rpc_restart_call_prepare(task);
8196 dprintk("<-- %s\n", __func__);
8199 static void nfs4_free_reclaim_complete_data(void *data)
8201 struct nfs4_reclaim_complete_data *calldata = data;
8206 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
8207 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
8208 .rpc_call_done = nfs4_reclaim_complete_done,
8209 .rpc_release = nfs4_free_reclaim_complete_data,
8213 * Issue a global reclaim complete.
8215 static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
8216 struct rpc_cred *cred)
8218 struct nfs4_reclaim_complete_data *calldata;
8219 struct rpc_task *task;
8220 struct rpc_message msg = {
8221 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
8224 struct rpc_task_setup task_setup_data = {
8225 .rpc_client = clp->cl_rpcclient,
8226 .rpc_message = &msg,
8227 .callback_ops = &nfs4_reclaim_complete_call_ops,
8228 .flags = RPC_TASK_ASYNC,
8230 int status = -ENOMEM;
8232 dprintk("--> %s\n", __func__);
8233 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
8234 if (calldata == NULL)
8236 calldata->clp = clp;
8237 calldata->arg.one_fs = 0;
8239 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8240 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
8241 msg.rpc_argp = &calldata->arg;
8242 msg.rpc_resp = &calldata->res;
8243 task_setup_data.callback_data = calldata;
8244 task = rpc_run_task(&task_setup_data);
8246 status = PTR_ERR(task);
8249 status = rpc_wait_for_completion_task(task);
8251 status = task->tk_status;
8254 dprintk("<-- %s status=%d\n", __func__, status);
8259 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
8261 struct nfs4_layoutget *lgp = calldata;
8262 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
8264 dprintk("--> %s\n", __func__);
8265 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args,
8266 &lgp->res.seq_res, task);
8267 dprintk("<-- %s\n", __func__);
8270 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
8272 struct nfs4_layoutget *lgp = calldata;
8274 dprintk("--> %s\n", __func__);
8275 nfs41_sequence_process(task, &lgp->res.seq_res);
8276 dprintk("<-- %s\n", __func__);
8280 nfs4_layoutget_handle_exception(struct rpc_task *task,
8281 struct nfs4_layoutget *lgp, struct nfs4_exception *exception)
8283 struct inode *inode = lgp->args.inode;
8284 struct nfs_server *server = NFS_SERVER(inode);
8285 struct pnfs_layout_hdr *lo;
8286 int nfs4err = task->tk_status;
8287 int err, status = 0;
8290 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
8297 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
8298 * on the file. set tk_status to -ENODATA to tell upper layer to
8301 case -NFS4ERR_LAYOUTUNAVAILABLE:
8305 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
8306 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
8308 case -NFS4ERR_BADLAYOUT:
8309 status = -EOVERFLOW;
8312 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
8313 * (or clients) writing to the same RAID stripe except when
8314 * the minlength argument is 0 (see RFC5661 section 18.43.3).
8316 * Treat it like we would RECALLCONFLICT -- we retry for a little
8317 * while, and then eventually give up.
8319 case -NFS4ERR_LAYOUTTRYLATER:
8320 if (lgp->args.minlength == 0) {
8321 status = -EOVERFLOW;
8326 case -NFS4ERR_RECALLCONFLICT:
8327 status = -ERECALLCONFLICT;
8329 case -NFS4ERR_DELEG_REVOKED:
8330 case -NFS4ERR_ADMIN_REVOKED:
8331 case -NFS4ERR_EXPIRED:
8332 case -NFS4ERR_BAD_STATEID:
8333 exception->timeout = 0;
8334 spin_lock(&inode->i_lock);
8335 lo = NFS_I(inode)->layout;
8336 /* If the open stateid was bad, then recover it. */
8337 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
8338 nfs4_stateid_match_other(&lgp->args.stateid,
8339 &lgp->args.ctx->state->stateid)) {
8340 spin_unlock(&inode->i_lock);
8341 exception->state = lgp->args.ctx->state;
8342 exception->stateid = &lgp->args.stateid;
8347 * Mark the bad layout state as invalid, then retry
8349 pnfs_mark_layout_stateid_invalid(lo, &head);
8350 spin_unlock(&inode->i_lock);
8351 nfs_commit_inode(inode, 0);
8352 pnfs_free_lseg_list(&head);
8357 nfs4_sequence_free_slot(&lgp->res.seq_res);
8358 err = nfs4_handle_exception(server, nfs4err, exception);
8360 if (exception->retry)
8366 dprintk("<-- %s\n", __func__);
8370 static size_t max_response_pages(struct nfs_server *server)
8372 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
8373 return nfs_page_array_len(0, max_resp_sz);
8376 static void nfs4_free_pages(struct page **pages, size_t size)
8383 for (i = 0; i < size; i++) {
8386 __free_page(pages[i]);
8391 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
8393 struct page **pages;
8396 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
8398 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
8402 for (i = 0; i < size; i++) {
8403 pages[i] = alloc_page(gfp_flags);
8405 dprintk("%s: failed to allocate page\n", __func__);
8406 nfs4_free_pages(pages, size);
8414 static void nfs4_layoutget_release(void *calldata)
8416 struct nfs4_layoutget *lgp = calldata;
8417 struct inode *inode = lgp->args.inode;
8418 struct nfs_server *server = NFS_SERVER(inode);
8419 size_t max_pages = max_response_pages(server);
8421 dprintk("--> %s\n", __func__);
8422 nfs4_free_pages(lgp->args.layout.pages, max_pages);
8423 pnfs_put_layout_hdr(NFS_I(inode)->layout);
8424 put_nfs_open_context(lgp->args.ctx);
8426 dprintk("<-- %s\n", __func__);
8429 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
8430 .rpc_call_prepare = nfs4_layoutget_prepare,
8431 .rpc_call_done = nfs4_layoutget_done,
8432 .rpc_release = nfs4_layoutget_release,
8435 struct pnfs_layout_segment *
8436 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags)
8438 struct inode *inode = lgp->args.inode;
8439 struct nfs_server *server = NFS_SERVER(inode);
8440 size_t max_pages = max_response_pages(server);
8441 struct rpc_task *task;
8442 struct rpc_message msg = {
8443 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
8444 .rpc_argp = &lgp->args,
8445 .rpc_resp = &lgp->res,
8446 .rpc_cred = lgp->cred,
8448 struct rpc_task_setup task_setup_data = {
8449 .rpc_client = server->client,
8450 .rpc_message = &msg,
8451 .callback_ops = &nfs4_layoutget_call_ops,
8452 .callback_data = lgp,
8453 .flags = RPC_TASK_ASYNC,
8455 struct pnfs_layout_segment *lseg = NULL;
8456 struct nfs4_exception exception = {
8458 .timeout = *timeout,
8462 dprintk("--> %s\n", __func__);
8464 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
8465 pnfs_get_layout_hdr(NFS_I(inode)->layout);
8467 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
8468 if (!lgp->args.layout.pages) {
8469 nfs4_layoutget_release(lgp);
8470 return ERR_PTR(-ENOMEM);
8472 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
8474 lgp->res.layoutp = &lgp->args.layout;
8475 lgp->res.seq_res.sr_slot = NULL;
8476 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
8478 task = rpc_run_task(&task_setup_data);
8480 return ERR_CAST(task);
8481 status = rpc_wait_for_completion_task(task);
8483 status = nfs4_layoutget_handle_exception(task, lgp, &exception);
8484 *timeout = exception.timeout;
8487 trace_nfs4_layoutget(lgp->args.ctx,
8493 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8494 if (status == 0 && lgp->res.layoutp->len)
8495 lseg = pnfs_layout_process(lgp);
8496 nfs4_sequence_free_slot(&lgp->res.seq_res);
8498 dprintk("<-- %s status=%d\n", __func__, status);
8500 return ERR_PTR(status);
8505 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8507 struct nfs4_layoutreturn *lrp = calldata;
8509 dprintk("--> %s\n", __func__);
8510 nfs4_setup_sequence(lrp->clp,
8511 &lrp->args.seq_args,
8516 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8518 struct nfs4_layoutreturn *lrp = calldata;
8519 struct nfs_server *server;
8521 dprintk("--> %s\n", __func__);
8523 if (!nfs41_sequence_process(task, &lrp->res.seq_res))
8526 server = NFS_SERVER(lrp->args.inode);
8527 switch (task->tk_status) {
8529 task->tk_status = 0;
8532 case -NFS4ERR_DELAY:
8533 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
8535 nfs4_sequence_free_slot(&lrp->res.seq_res);
8536 rpc_restart_call_prepare(task);
8539 dprintk("<-- %s\n", __func__);
8542 static void nfs4_layoutreturn_release(void *calldata)
8544 struct nfs4_layoutreturn *lrp = calldata;
8545 struct pnfs_layout_hdr *lo = lrp->args.layout;
8547 dprintk("--> %s\n", __func__);
8548 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range,
8549 lrp->res.lrs_present ? &lrp->res.stateid : NULL);
8550 nfs4_sequence_free_slot(&lrp->res.seq_res);
8551 if (lrp->ld_private.ops && lrp->ld_private.ops->free)
8552 lrp->ld_private.ops->free(&lrp->ld_private);
8553 pnfs_put_layout_hdr(lrp->args.layout);
8554 nfs_iput_and_deactive(lrp->inode);
8556 dprintk("<-- %s\n", __func__);
8559 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8560 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8561 .rpc_call_done = nfs4_layoutreturn_done,
8562 .rpc_release = nfs4_layoutreturn_release,
8565 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
8567 struct rpc_task *task;
8568 struct rpc_message msg = {
8569 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8570 .rpc_argp = &lrp->args,
8571 .rpc_resp = &lrp->res,
8572 .rpc_cred = lrp->cred,
8574 struct rpc_task_setup task_setup_data = {
8575 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
8576 .rpc_message = &msg,
8577 .callback_ops = &nfs4_layoutreturn_call_ops,
8578 .callback_data = lrp,
8582 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
8583 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
8584 &task_setup_data.rpc_client, &msg);
8586 dprintk("--> %s\n", __func__);
8588 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8590 nfs4_layoutreturn_release(lrp);
8593 task_setup_data.flags |= RPC_TASK_ASYNC;
8595 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
8596 task = rpc_run_task(&task_setup_data);
8598 return PTR_ERR(task);
8600 status = task->tk_status;
8601 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
8602 dprintk("<-- %s status=%d\n", __func__, status);
8608 _nfs4_proc_getdeviceinfo(struct nfs_server *server,
8609 struct pnfs_device *pdev,
8610 struct rpc_cred *cred)
8612 struct nfs4_getdeviceinfo_args args = {
8614 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8615 NOTIFY_DEVICEID4_DELETE,
8617 struct nfs4_getdeviceinfo_res res = {
8620 struct rpc_message msg = {
8621 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8628 dprintk("--> %s\n", __func__);
8629 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
8630 if (res.notification & ~args.notify_types)
8631 dprintk("%s: unsupported notification\n", __func__);
8632 if (res.notification != args.notify_types)
8635 dprintk("<-- %s status=%d\n", __func__, status);
8640 int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8641 struct pnfs_device *pdev,
8642 struct rpc_cred *cred)
8644 struct nfs4_exception exception = { };
8648 err = nfs4_handle_exception(server,
8649 _nfs4_proc_getdeviceinfo(server, pdev, cred),
8651 } while (exception.retry);
8654 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8656 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8658 struct nfs4_layoutcommit_data *data = calldata;
8659 struct nfs_server *server = NFS_SERVER(data->args.inode);
8661 nfs4_setup_sequence(server->nfs_client,
8662 &data->args.seq_args,
8668 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8670 struct nfs4_layoutcommit_data *data = calldata;
8671 struct nfs_server *server = NFS_SERVER(data->args.inode);
8673 if (!nfs41_sequence_done(task, &data->res.seq_res))
8676 switch (task->tk_status) { /* Just ignore these failures */
8677 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8678 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8679 case -NFS4ERR_BADLAYOUT: /* no layout */
8680 case -NFS4ERR_GRACE: /* loca_recalim always false */
8681 task->tk_status = 0;
8685 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
8686 rpc_restart_call_prepare(task);
8692 static void nfs4_layoutcommit_release(void *calldata)
8694 struct nfs4_layoutcommit_data *data = calldata;
8696 pnfs_cleanup_layoutcommit(data);
8697 nfs_post_op_update_inode_force_wcc(data->args.inode,
8699 put_rpccred(data->cred);
8700 nfs_iput_and_deactive(data->inode);
8704 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8705 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8706 .rpc_call_done = nfs4_layoutcommit_done,
8707 .rpc_release = nfs4_layoutcommit_release,
8711 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
8713 struct rpc_message msg = {
8714 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8715 .rpc_argp = &data->args,
8716 .rpc_resp = &data->res,
8717 .rpc_cred = data->cred,
8719 struct rpc_task_setup task_setup_data = {
8720 .task = &data->task,
8721 .rpc_client = NFS_CLIENT(data->args.inode),
8722 .rpc_message = &msg,
8723 .callback_ops = &nfs4_layoutcommit_ops,
8724 .callback_data = data,
8726 struct rpc_task *task;
8729 dprintk("NFS: initiating layoutcommit call. sync %d "
8730 "lbw: %llu inode %lu\n", sync,
8731 data->args.lastbytewritten,
8732 data->args.inode->i_ino);
8735 data->inode = nfs_igrab_and_active(data->args.inode);
8736 if (data->inode == NULL) {
8737 nfs4_layoutcommit_release(data);
8740 task_setup_data.flags = RPC_TASK_ASYNC;
8742 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
8743 task = rpc_run_task(&task_setup_data);
8745 return PTR_ERR(task);
8747 status = task->tk_status;
8748 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
8749 dprintk("%s: status %d\n", __func__, status);
8755 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8756 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8759 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8760 struct nfs_fsinfo *info,
8761 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
8763 struct nfs41_secinfo_no_name_args args = {
8764 .style = SECINFO_STYLE_CURRENT_FH,
8766 struct nfs4_secinfo_res res = {
8769 struct rpc_message msg = {
8770 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8774 struct rpc_clnt *clnt = server->client;
8775 struct rpc_cred *cred = NULL;
8778 if (use_integrity) {
8779 clnt = server->nfs_client->cl_rpcclient;
8780 cred = nfs4_get_clid_cred(server->nfs_client);
8781 msg.rpc_cred = cred;
8784 dprintk("--> %s\n", __func__);
8785 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8787 dprintk("<-- %s status=%d\n", __func__, status);
8796 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8797 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8799 struct nfs4_exception exception = { };
8802 /* first try using integrity protection */
8803 err = -NFS4ERR_WRONGSEC;
8805 /* try to use integrity protection with machine cred */
8806 if (_nfs4_is_integrity_protected(server->nfs_client))
8807 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8811 * if unable to use integrity protection, or SECINFO with
8812 * integrity protection returns NFS4ERR_WRONGSEC (which is
8813 * disallowed by spec, but exists in deployed servers) use
8814 * the current filesystem's rpc_client and the user cred.
8816 if (err == -NFS4ERR_WRONGSEC)
8817 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8822 case -NFS4ERR_WRONGSEC:
8826 err = nfs4_handle_exception(server, err, &exception);
8828 } while (exception.retry);
8834 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8835 struct nfs_fsinfo *info)
8839 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
8840 struct nfs4_secinfo_flavors *flavors;
8841 struct nfs4_secinfo4 *secinfo;
8844 page = alloc_page(GFP_KERNEL);
8850 flavors = page_address(page);
8851 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8854 * Fall back on "guess and check" method if
8855 * the server doesn't support SECINFO_NO_NAME
8857 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
8858 err = nfs4_find_root_sec(server, fhandle, info);
8864 for (i = 0; i < flavors->num_flavors; i++) {
8865 secinfo = &flavors->flavors[i];
8867 switch (secinfo->flavor) {
8871 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8872 &secinfo->flavor_info);
8875 flavor = RPC_AUTH_MAXFLAVOR;
8879 if (!nfs_auth_info_match(&server->auth_info, flavor))
8880 flavor = RPC_AUTH_MAXFLAVOR;
8882 if (flavor != RPC_AUTH_MAXFLAVOR) {
8883 err = nfs4_lookup_root_sec(server, fhandle,
8890 if (flavor == RPC_AUTH_MAXFLAVOR)
8901 static int _nfs41_test_stateid(struct nfs_server *server,
8902 nfs4_stateid *stateid,
8903 struct rpc_cred *cred)
8906 struct nfs41_test_stateid_args args = {
8909 struct nfs41_test_stateid_res res;
8910 struct rpc_message msg = {
8911 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8916 struct rpc_clnt *rpc_client = server->client;
8918 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8921 dprintk("NFS call test_stateid %p\n", stateid);
8922 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8923 nfs4_set_sequence_privileged(&args.seq_args);
8924 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8925 &args.seq_args, &res.seq_res);
8926 if (status != NFS_OK) {
8927 dprintk("NFS reply test_stateid: failed, %d\n", status);
8930 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
8934 static void nfs4_handle_delay_or_session_error(struct nfs_server *server,
8935 int err, struct nfs4_exception *exception)
8937 exception->retry = 0;
8939 case -NFS4ERR_DELAY:
8940 case -NFS4ERR_RETRY_UNCACHED_REP:
8941 nfs4_handle_exception(server, err, exception);
8943 case -NFS4ERR_BADSESSION:
8944 case -NFS4ERR_BADSLOT:
8945 case -NFS4ERR_BAD_HIGH_SLOT:
8946 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
8947 case -NFS4ERR_DEADSESSION:
8948 nfs4_do_handle_exception(server, err, exception);
8953 * nfs41_test_stateid - perform a TEST_STATEID operation
8955 * @server: server / transport on which to perform the operation
8956 * @stateid: state ID to test
8959 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8960 * Otherwise a negative NFS4ERR value is returned if the operation
8961 * failed or the state ID is not currently valid.
8963 static int nfs41_test_stateid(struct nfs_server *server,
8964 nfs4_stateid *stateid,
8965 struct rpc_cred *cred)
8967 struct nfs4_exception exception = { };
8970 err = _nfs41_test_stateid(server, stateid, cred);
8971 nfs4_handle_delay_or_session_error(server, err, &exception);
8972 } while (exception.retry);
8976 struct nfs_free_stateid_data {
8977 struct nfs_server *server;
8978 struct nfs41_free_stateid_args args;
8979 struct nfs41_free_stateid_res res;
8982 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8984 struct nfs_free_stateid_data *data = calldata;
8985 nfs4_setup_sequence(data->server->nfs_client,
8986 &data->args.seq_args,
8991 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8993 struct nfs_free_stateid_data *data = calldata;
8995 nfs41_sequence_done(task, &data->res.seq_res);
8997 switch (task->tk_status) {
8998 case -NFS4ERR_DELAY:
8999 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
9000 rpc_restart_call_prepare(task);
9004 static void nfs41_free_stateid_release(void *calldata)
9009 static const struct rpc_call_ops nfs41_free_stateid_ops = {
9010 .rpc_call_prepare = nfs41_free_stateid_prepare,
9011 .rpc_call_done = nfs41_free_stateid_done,
9012 .rpc_release = nfs41_free_stateid_release,
9015 static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
9016 const nfs4_stateid *stateid,
9017 struct rpc_cred *cred,
9020 struct rpc_message msg = {
9021 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
9024 struct rpc_task_setup task_setup = {
9025 .rpc_client = server->client,
9026 .rpc_message = &msg,
9027 .callback_ops = &nfs41_free_stateid_ops,
9028 .flags = RPC_TASK_ASYNC,
9030 struct nfs_free_stateid_data *data;
9032 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9033 &task_setup.rpc_client, &msg);
9035 dprintk("NFS call free_stateid %p\n", stateid);
9036 data = kmalloc(sizeof(*data), GFP_NOFS);
9038 return ERR_PTR(-ENOMEM);
9039 data->server = server;
9040 nfs4_stateid_copy(&data->args.stateid, stateid);
9042 task_setup.callback_data = data;
9044 msg.rpc_argp = &data->args;
9045 msg.rpc_resp = &data->res;
9046 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
9048 nfs4_set_sequence_privileged(&data->args.seq_args);
9050 return rpc_run_task(&task_setup);
9054 * nfs41_free_stateid - perform a FREE_STATEID operation
9056 * @server: server / transport on which to perform the operation
9057 * @stateid: state ID to release
9059 * @is_recovery: set to true if this call needs to be privileged
9061 * Note: this function is always asynchronous.
9063 static int nfs41_free_stateid(struct nfs_server *server,
9064 const nfs4_stateid *stateid,
9065 struct rpc_cred *cred,
9068 struct rpc_task *task;
9070 task = _nfs41_free_stateid(server, stateid, cred, is_recovery);
9072 return PTR_ERR(task);
9078 nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
9080 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
9082 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
9083 nfs4_free_lock_state(server, lsp);
9086 static bool nfs41_match_stateid(const nfs4_stateid *s1,
9087 const nfs4_stateid *s2)
9089 if (s1->type != s2->type)
9092 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
9095 if (s1->seqid == s2->seqid)
9098 return s1->seqid == 0 || s2->seqid == 0;
9101 #endif /* CONFIG_NFS_V4_1 */
9103 static bool nfs4_match_stateid(const nfs4_stateid *s1,
9104 const nfs4_stateid *s2)
9106 return nfs4_stateid_match(s1, s2);
9110 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
9111 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9112 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9113 .recover_open = nfs4_open_reclaim,
9114 .recover_lock = nfs4_lock_reclaim,
9115 .establish_clid = nfs4_init_clientid,
9116 .detect_trunking = nfs40_discover_server_trunking,
9119 #if defined(CONFIG_NFS_V4_1)
9120 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
9121 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9122 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9123 .recover_open = nfs4_open_reclaim,
9124 .recover_lock = nfs4_lock_reclaim,
9125 .establish_clid = nfs41_init_clientid,
9126 .reclaim_complete = nfs41_proc_reclaim_complete,
9127 .detect_trunking = nfs41_discover_server_trunking,
9129 #endif /* CONFIG_NFS_V4_1 */
9131 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
9132 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9133 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
9134 .recover_open = nfs40_open_expired,
9135 .recover_lock = nfs4_lock_expired,
9136 .establish_clid = nfs4_init_clientid,
9139 #if defined(CONFIG_NFS_V4_1)
9140 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
9141 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9142 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
9143 .recover_open = nfs41_open_expired,
9144 .recover_lock = nfs41_lock_expired,
9145 .establish_clid = nfs41_init_clientid,
9147 #endif /* CONFIG_NFS_V4_1 */
9149 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
9150 .sched_state_renewal = nfs4_proc_async_renew,
9151 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
9152 .renew_lease = nfs4_proc_renew,
9155 #if defined(CONFIG_NFS_V4_1)
9156 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
9157 .sched_state_renewal = nfs41_proc_async_sequence,
9158 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
9159 .renew_lease = nfs4_proc_sequence,
9163 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
9164 .get_locations = _nfs40_proc_get_locations,
9165 .fsid_present = _nfs40_proc_fsid_present,
9168 #if defined(CONFIG_NFS_V4_1)
9169 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
9170 .get_locations = _nfs41_proc_get_locations,
9171 .fsid_present = _nfs41_proc_fsid_present,
9173 #endif /* CONFIG_NFS_V4_1 */
9175 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
9177 .init_caps = NFS_CAP_READDIRPLUS
9178 | NFS_CAP_ATOMIC_OPEN
9179 | NFS_CAP_POSIX_LOCK,
9180 .init_client = nfs40_init_client,
9181 .shutdown_client = nfs40_shutdown_client,
9182 .match_stateid = nfs4_match_stateid,
9183 .find_root_sec = nfs4_find_root_sec,
9184 .free_lock_state = nfs4_release_lockowner,
9185 .test_and_free_expired = nfs40_test_and_free_expired_stateid,
9186 .alloc_seqid = nfs_alloc_seqid,
9187 .call_sync_ops = &nfs40_call_sync_ops,
9188 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
9189 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
9190 .state_renewal_ops = &nfs40_state_renewal_ops,
9191 .mig_recovery_ops = &nfs40_mig_recovery_ops,
9194 #if defined(CONFIG_NFS_V4_1)
9195 static struct nfs_seqid *
9196 nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
9201 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
9203 .init_caps = NFS_CAP_READDIRPLUS
9204 | NFS_CAP_ATOMIC_OPEN
9205 | NFS_CAP_POSIX_LOCK
9206 | NFS_CAP_STATEID_NFSV41
9207 | NFS_CAP_ATOMIC_OPEN_V1,
9208 .init_client = nfs41_init_client,
9209 .shutdown_client = nfs41_shutdown_client,
9210 .match_stateid = nfs41_match_stateid,
9211 .find_root_sec = nfs41_find_root_sec,
9212 .free_lock_state = nfs41_free_lock_state,
9213 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
9214 .alloc_seqid = nfs_alloc_no_seqid,
9215 .session_trunk = nfs4_test_session_trunk,
9216 .call_sync_ops = &nfs41_call_sync_ops,
9217 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9218 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9219 .state_renewal_ops = &nfs41_state_renewal_ops,
9220 .mig_recovery_ops = &nfs41_mig_recovery_ops,
9224 #if defined(CONFIG_NFS_V4_2)
9225 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
9227 .init_caps = NFS_CAP_READDIRPLUS
9228 | NFS_CAP_ATOMIC_OPEN
9229 | NFS_CAP_POSIX_LOCK
9230 | NFS_CAP_STATEID_NFSV41
9231 | NFS_CAP_ATOMIC_OPEN_V1
9234 | NFS_CAP_DEALLOCATE
9236 | NFS_CAP_LAYOUTSTATS
9238 .init_client = nfs41_init_client,
9239 .shutdown_client = nfs41_shutdown_client,
9240 .match_stateid = nfs41_match_stateid,
9241 .find_root_sec = nfs41_find_root_sec,
9242 .free_lock_state = nfs41_free_lock_state,
9243 .call_sync_ops = &nfs41_call_sync_ops,
9244 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
9245 .alloc_seqid = nfs_alloc_no_seqid,
9246 .session_trunk = nfs4_test_session_trunk,
9247 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9248 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9249 .state_renewal_ops = &nfs41_state_renewal_ops,
9250 .mig_recovery_ops = &nfs41_mig_recovery_ops,
9254 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
9255 [0] = &nfs_v4_0_minor_ops,
9256 #if defined(CONFIG_NFS_V4_1)
9257 [1] = &nfs_v4_1_minor_ops,
9259 #if defined(CONFIG_NFS_V4_2)
9260 [2] = &nfs_v4_2_minor_ops,
9264 static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
9266 ssize_t error, error2;
9268 error = generic_listxattr(dentry, list, size);
9276 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
9279 return error + error2;
9282 static const struct inode_operations nfs4_dir_inode_operations = {
9283 .create = nfs_create,
9284 .lookup = nfs_lookup,
9285 .atomic_open = nfs_atomic_open,
9287 .unlink = nfs_unlink,
9288 .symlink = nfs_symlink,
9292 .rename = nfs_rename,
9293 .permission = nfs_permission,
9294 .getattr = nfs_getattr,
9295 .setattr = nfs_setattr,
9296 .listxattr = nfs4_listxattr,
9299 static const struct inode_operations nfs4_file_inode_operations = {
9300 .permission = nfs_permission,
9301 .getattr = nfs_getattr,
9302 .setattr = nfs_setattr,
9303 .listxattr = nfs4_listxattr,
9306 const struct nfs_rpc_ops nfs_v4_clientops = {
9307 .version = 4, /* protocol version */
9308 .dentry_ops = &nfs4_dentry_operations,
9309 .dir_inode_ops = &nfs4_dir_inode_operations,
9310 .file_inode_ops = &nfs4_file_inode_operations,
9311 .file_ops = &nfs4_file_operations,
9312 .getroot = nfs4_proc_get_root,
9313 .submount = nfs4_submount,
9314 .try_mount = nfs4_try_mount,
9315 .getattr = nfs4_proc_getattr,
9316 .setattr = nfs4_proc_setattr,
9317 .lookup = nfs4_proc_lookup,
9318 .access = nfs4_proc_access,
9319 .readlink = nfs4_proc_readlink,
9320 .create = nfs4_proc_create,
9321 .remove = nfs4_proc_remove,
9322 .unlink_setup = nfs4_proc_unlink_setup,
9323 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
9324 .unlink_done = nfs4_proc_unlink_done,
9325 .rename_setup = nfs4_proc_rename_setup,
9326 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
9327 .rename_done = nfs4_proc_rename_done,
9328 .link = nfs4_proc_link,
9329 .symlink = nfs4_proc_symlink,
9330 .mkdir = nfs4_proc_mkdir,
9331 .rmdir = nfs4_proc_remove,
9332 .readdir = nfs4_proc_readdir,
9333 .mknod = nfs4_proc_mknod,
9334 .statfs = nfs4_proc_statfs,
9335 .fsinfo = nfs4_proc_fsinfo,
9336 .pathconf = nfs4_proc_pathconf,
9337 .set_capabilities = nfs4_server_capabilities,
9338 .decode_dirent = nfs4_decode_dirent,
9339 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
9340 .read_setup = nfs4_proc_read_setup,
9341 .read_done = nfs4_read_done,
9342 .write_setup = nfs4_proc_write_setup,
9343 .write_done = nfs4_write_done,
9344 .commit_setup = nfs4_proc_commit_setup,
9345 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
9346 .commit_done = nfs4_commit_done,
9347 .lock = nfs4_proc_lock,
9348 .clear_acl_cache = nfs4_zap_acl_attr,
9349 .close_context = nfs4_close_context,
9350 .open_context = nfs4_atomic_open,
9351 .have_delegation = nfs4_have_delegation,
9352 .return_delegation = nfs4_inode_return_delegation,
9353 .alloc_client = nfs4_alloc_client,
9354 .init_client = nfs4_init_client,
9355 .free_client = nfs4_free_client,
9356 .create_server = nfs4_create_server,
9357 .clone_server = nfs_clone_server,
9360 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
9361 .name = XATTR_NAME_NFSV4_ACL,
9362 .list = nfs4_xattr_list_nfs4_acl,
9363 .get = nfs4_xattr_get_nfs4_acl,
9364 .set = nfs4_xattr_set_nfs4_acl,
9367 const struct xattr_handler *nfs4_xattr_handlers[] = {
9368 &nfs4_xattr_nfs4_acl_handler,
9369 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
9370 &nfs4_xattr_nfs4_label_handler,