4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #include <linux/delay.h>
40 #include <linux/errno.h>
41 #include <linux/string.h>
42 #include <linux/ratelimit.h>
43 #include <linux/printk.h>
44 #include <linux/slab.h>
45 #include <linux/sunrpc/clnt.h>
46 #include <linux/nfs.h>
47 #include <linux/nfs4.h>
48 #include <linux/nfs_fs.h>
49 #include <linux/nfs_page.h>
50 #include <linux/nfs_mount.h>
51 #include <linux/namei.h>
52 #include <linux/mount.h>
53 #include <linux/module.h>
54 #include <linux/nfs_idmap.h>
55 #include <linux/xattr.h>
56 #include <linux/utsname.h>
57 #include <linux/freezer.h>
60 #include "delegation.h"
66 #include "nfs4session.h"
69 #include "nfs4trace.h"
71 #define NFSDBG_FACILITY NFSDBG_PROC
73 #define NFS4_POLL_RETRY_MIN (HZ/10)
74 #define NFS4_POLL_RETRY_MAX (15*HZ)
77 static int _nfs4_proc_open(struct nfs4_opendata *data);
78 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
79 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
80 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *, long *);
81 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
82 static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
83 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
84 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
85 struct nfs_fattr *fattr, struct iattr *sattr,
86 struct nfs4_state *state, struct nfs4_label *ilabel,
87 struct nfs4_label *olabel);
88 #ifdef CONFIG_NFS_V4_1
89 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
91 static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
95 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
96 static inline struct nfs4_label *
97 nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
98 struct iattr *sattr, struct nfs4_label *label)
105 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
108 err = security_dentry_init_security(dentry, sattr->ia_mode,
109 &dentry->d_name, (void **)&label->label, &label->len);
116 nfs4_label_release_security(struct nfs4_label *label)
119 security_release_secctx(label->label, label->len);
121 static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
124 return server->attr_bitmask;
126 return server->attr_bitmask_nl;
129 static inline struct nfs4_label *
130 nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
131 struct iattr *sattr, struct nfs4_label *l)
134 nfs4_label_release_security(struct nfs4_label *label)
137 nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
138 { return server->attr_bitmask; }
141 /* Prevent leaks of NFSv4 errors into userland */
142 static int nfs4_map_errors(int err)
147 case -NFS4ERR_RESOURCE:
148 case -NFS4ERR_LAYOUTTRYLATER:
149 case -NFS4ERR_RECALLCONFLICT:
151 case -NFS4ERR_WRONGSEC:
152 case -NFS4ERR_WRONG_CRED:
154 case -NFS4ERR_BADOWNER:
155 case -NFS4ERR_BADNAME:
157 case -NFS4ERR_SHARE_DENIED:
159 case -NFS4ERR_MINOR_VERS_MISMATCH:
160 return -EPROTONOSUPPORT;
161 case -NFS4ERR_FILE_OPEN:
164 dprintk("%s could not handle NFSv4 error %d\n",
172 * This is our standard bitmap for GETATTR requests.
174 const u32 nfs4_fattr_bitmap[3] = {
176 | FATTR4_WORD0_CHANGE
179 | FATTR4_WORD0_FILEID,
181 | FATTR4_WORD1_NUMLINKS
183 | FATTR4_WORD1_OWNER_GROUP
184 | FATTR4_WORD1_RAWDEV
185 | FATTR4_WORD1_SPACE_USED
186 | FATTR4_WORD1_TIME_ACCESS
187 | FATTR4_WORD1_TIME_METADATA
188 | FATTR4_WORD1_TIME_MODIFY,
189 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
190 FATTR4_WORD2_SECURITY_LABEL
194 static const u32 nfs4_pnfs_open_bitmap[3] = {
196 | FATTR4_WORD0_CHANGE
199 | FATTR4_WORD0_FILEID,
201 | FATTR4_WORD1_NUMLINKS
203 | FATTR4_WORD1_OWNER_GROUP
204 | FATTR4_WORD1_RAWDEV
205 | FATTR4_WORD1_SPACE_USED
206 | FATTR4_WORD1_TIME_ACCESS
207 | FATTR4_WORD1_TIME_METADATA
208 | FATTR4_WORD1_TIME_MODIFY,
209 FATTR4_WORD2_MDSTHRESHOLD
212 static const u32 nfs4_open_noattr_bitmap[3] = {
214 | FATTR4_WORD0_CHANGE
215 | FATTR4_WORD0_FILEID,
218 const u32 nfs4_statfs_bitmap[3] = {
219 FATTR4_WORD0_FILES_AVAIL
220 | FATTR4_WORD0_FILES_FREE
221 | FATTR4_WORD0_FILES_TOTAL,
222 FATTR4_WORD1_SPACE_AVAIL
223 | FATTR4_WORD1_SPACE_FREE
224 | FATTR4_WORD1_SPACE_TOTAL
227 const u32 nfs4_pathconf_bitmap[3] = {
229 | FATTR4_WORD0_MAXNAME,
233 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
234 | FATTR4_WORD0_MAXREAD
235 | FATTR4_WORD0_MAXWRITE
236 | FATTR4_WORD0_LEASE_TIME,
237 FATTR4_WORD1_TIME_DELTA
238 | FATTR4_WORD1_FS_LAYOUT_TYPES,
239 FATTR4_WORD2_LAYOUT_BLKSIZE
242 const u32 nfs4_fs_locations_bitmap[3] = {
244 | FATTR4_WORD0_CHANGE
247 | FATTR4_WORD0_FILEID
248 | FATTR4_WORD0_FS_LOCATIONS,
250 | FATTR4_WORD1_NUMLINKS
252 | FATTR4_WORD1_OWNER_GROUP
253 | FATTR4_WORD1_RAWDEV
254 | FATTR4_WORD1_SPACE_USED
255 | FATTR4_WORD1_TIME_ACCESS
256 | FATTR4_WORD1_TIME_METADATA
257 | FATTR4_WORD1_TIME_MODIFY
258 | FATTR4_WORD1_MOUNTED_ON_FILEID,
261 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
262 struct nfs4_readdir_arg *readdir)
267 readdir->cookie = cookie;
268 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
273 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
278 * NFSv4 servers do not return entries for '.' and '..'
279 * Therefore, we fake these entries here. We let '.'
280 * have cookie 0 and '..' have cookie 1. Note that
281 * when talking to the server, we always send cookie 0
284 start = p = kmap_atomic(*readdir->pages);
287 *p++ = xdr_one; /* next */
288 *p++ = xdr_zero; /* cookie, first word */
289 *p++ = xdr_one; /* cookie, second word */
290 *p++ = xdr_one; /* entry len */
291 memcpy(p, ".\0\0\0", 4); /* entry */
293 *p++ = xdr_one; /* bitmap length */
294 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
295 *p++ = htonl(8); /* attribute buffer length */
296 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
299 *p++ = xdr_one; /* next */
300 *p++ = xdr_zero; /* cookie, first word */
301 *p++ = xdr_two; /* cookie, second word */
302 *p++ = xdr_two; /* entry len */
303 memcpy(p, "..\0\0", 4); /* entry */
305 *p++ = xdr_one; /* bitmap length */
306 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
307 *p++ = htonl(8); /* attribute buffer length */
308 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
310 readdir->pgbase = (char *)p - (char *)start;
311 readdir->count -= readdir->pgbase;
312 kunmap_atomic(start);
315 static long nfs4_update_delay(long *timeout)
319 return NFS4_POLL_RETRY_MAX;
321 *timeout = NFS4_POLL_RETRY_MIN;
322 if (*timeout > NFS4_POLL_RETRY_MAX)
323 *timeout = NFS4_POLL_RETRY_MAX;
329 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
335 freezable_schedule_timeout_killable_unsafe(
336 nfs4_update_delay(timeout));
337 if (fatal_signal_pending(current))
342 /* This is the error handling routine for processes that are allowed
345 int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
347 struct nfs_client *clp = server->nfs_client;
348 struct nfs4_state *state = exception->state;
349 struct inode *inode = exception->inode;
352 exception->retry = 0;
356 case -NFS4ERR_OPENMODE:
357 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
358 nfs4_inode_return_delegation(inode);
359 exception->retry = 1;
364 ret = nfs4_schedule_stateid_recovery(server, state);
367 goto wait_on_recovery;
368 case -NFS4ERR_DELEG_REVOKED:
369 case -NFS4ERR_ADMIN_REVOKED:
370 case -NFS4ERR_BAD_STATEID:
373 ret = nfs4_schedule_stateid_recovery(server, state);
376 goto wait_on_recovery;
377 case -NFS4ERR_EXPIRED:
379 ret = nfs4_schedule_stateid_recovery(server, state);
383 case -NFS4ERR_STALE_STATEID:
384 case -NFS4ERR_STALE_CLIENTID:
385 nfs4_schedule_lease_recovery(clp);
386 goto wait_on_recovery;
388 ret = nfs4_schedule_migration_recovery(server);
391 goto wait_on_recovery;
392 case -NFS4ERR_LEASE_MOVED:
393 nfs4_schedule_lease_moved_recovery(clp);
394 goto wait_on_recovery;
395 #if defined(CONFIG_NFS_V4_1)
396 case -NFS4ERR_BADSESSION:
397 case -NFS4ERR_BADSLOT:
398 case -NFS4ERR_BAD_HIGH_SLOT:
399 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
400 case -NFS4ERR_DEADSESSION:
401 case -NFS4ERR_SEQ_FALSE_RETRY:
402 case -NFS4ERR_SEQ_MISORDERED:
403 dprintk("%s ERROR: %d Reset session\n", __func__,
405 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
406 goto wait_on_recovery;
407 #endif /* defined(CONFIG_NFS_V4_1) */
408 case -NFS4ERR_FILE_OPEN:
409 if (exception->timeout > HZ) {
410 /* We have retried a decent amount, time to
418 ret = nfs4_delay(server->client, &exception->timeout);
421 case -NFS4ERR_RETRY_UNCACHED_REP:
422 case -NFS4ERR_OLD_STATEID:
423 exception->retry = 1;
425 case -NFS4ERR_BADOWNER:
426 /* The following works around a Linux server bug! */
427 case -NFS4ERR_BADNAME:
428 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
429 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
430 exception->retry = 1;
431 printk(KERN_WARNING "NFS: v4 server %s "
432 "does not accept raw "
434 "Reenabling the idmapper.\n",
435 server->nfs_client->cl_hostname);
438 /* We failed to handle the error */
439 return nfs4_map_errors(ret);
441 ret = nfs4_wait_clnt_recover(clp);
442 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
445 exception->retry = 1;
450 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
451 * or 'false' otherwise.
453 static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
455 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
457 if (flavor == RPC_AUTH_GSS_KRB5I ||
458 flavor == RPC_AUTH_GSS_KRB5P)
464 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
466 spin_lock(&clp->cl_lock);
467 if (time_before(clp->cl_last_renewal,timestamp))
468 clp->cl_last_renewal = timestamp;
469 spin_unlock(&clp->cl_lock);
472 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
474 do_renew_lease(server->nfs_client, timestamp);
477 struct nfs4_call_sync_data {
478 const struct nfs_server *seq_server;
479 struct nfs4_sequence_args *seq_args;
480 struct nfs4_sequence_res *seq_res;
483 static void nfs4_init_sequence(struct nfs4_sequence_args *args,
484 struct nfs4_sequence_res *res, int cache_reply)
486 args->sa_slot = NULL;
487 args->sa_cache_this = cache_reply;
488 args->sa_privileged = 0;
493 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
495 args->sa_privileged = 1;
498 int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
499 struct nfs4_sequence_args *args,
500 struct nfs4_sequence_res *res,
501 struct rpc_task *task)
503 struct nfs4_slot *slot;
505 /* slot already allocated? */
506 if (res->sr_slot != NULL)
509 spin_lock(&tbl->slot_tbl_lock);
510 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
513 slot = nfs4_alloc_slot(tbl);
515 if (slot == ERR_PTR(-ENOMEM))
516 task->tk_timeout = HZ >> 2;
519 spin_unlock(&tbl->slot_tbl_lock);
521 args->sa_slot = slot;
525 rpc_call_start(task);
529 if (args->sa_privileged)
530 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
531 NULL, RPC_PRIORITY_PRIVILEGED);
533 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
534 spin_unlock(&tbl->slot_tbl_lock);
537 EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
539 static int nfs40_sequence_done(struct rpc_task *task,
540 struct nfs4_sequence_res *res)
542 struct nfs4_slot *slot = res->sr_slot;
543 struct nfs4_slot_table *tbl;
549 spin_lock(&tbl->slot_tbl_lock);
550 if (!nfs41_wake_and_assign_slot(tbl, slot))
551 nfs4_free_slot(tbl, slot);
552 spin_unlock(&tbl->slot_tbl_lock);
559 #if defined(CONFIG_NFS_V4_1)
561 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
563 struct nfs4_session *session;
564 struct nfs4_slot_table *tbl;
565 struct nfs4_slot *slot = res->sr_slot;
566 bool send_new_highest_used_slotid = false;
569 session = tbl->session;
571 spin_lock(&tbl->slot_tbl_lock);
572 /* Be nice to the server: try to ensure that the last transmitted
573 * value for highest_user_slotid <= target_highest_slotid
575 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
576 send_new_highest_used_slotid = true;
578 if (nfs41_wake_and_assign_slot(tbl, slot)) {
579 send_new_highest_used_slotid = false;
582 nfs4_free_slot(tbl, slot);
584 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
585 send_new_highest_used_slotid = false;
587 spin_unlock(&tbl->slot_tbl_lock);
589 if (send_new_highest_used_slotid)
590 nfs41_server_notify_highest_slotid_update(session->clp);
593 int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
595 struct nfs4_session *session;
596 struct nfs4_slot *slot = res->sr_slot;
597 struct nfs_client *clp;
598 bool interrupted = false;
603 /* don't increment the sequence number if the task wasn't sent */
604 if (!RPC_WAS_SENT(task))
607 session = slot->table->session;
609 if (slot->interrupted) {
610 slot->interrupted = 0;
614 trace_nfs4_sequence_done(session, res);
615 /* Check the SEQUENCE operation status */
616 switch (res->sr_status) {
618 /* Update the slot's sequence and clientid lease timer */
621 do_renew_lease(clp, res->sr_timestamp);
622 /* Check sequence flags */
623 if (res->sr_status_flags != 0)
624 nfs4_schedule_lease_recovery(clp);
625 nfs41_update_target_slotid(slot->table, slot, res);
629 * sr_status remains 1 if an RPC level error occurred.
630 * The server may or may not have processed the sequence
632 * Mark the slot as having hosted an interrupted RPC call.
634 slot->interrupted = 1;
637 /* The server detected a resend of the RPC call and
638 * returned NFS4ERR_DELAY as per Section 2.10.6.2
641 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
646 case -NFS4ERR_BADSLOT:
648 * The slot id we used was probably retired. Try again
649 * using a different slot id.
652 case -NFS4ERR_SEQ_MISORDERED:
654 * Was the last operation on this sequence interrupted?
655 * If so, retry after bumping the sequence number.
662 * Could this slot have been previously retired?
663 * If so, then the server may be expecting seq_nr = 1!
665 if (slot->seq_nr != 1) {
670 case -NFS4ERR_SEQ_FALSE_RETRY:
674 /* Just update the slot sequence no. */
678 /* The session may be reset by one of the error handlers. */
679 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
680 nfs41_sequence_free_slot(res);
684 if (rpc_restart_call_prepare(task)) {
690 if (!rpc_restart_call(task))
692 rpc_delay(task, NFS4_POLL_RETRY_MAX);
695 EXPORT_SYMBOL_GPL(nfs41_sequence_done);
697 int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
699 if (res->sr_slot == NULL)
701 if (!res->sr_slot->table->session)
702 return nfs40_sequence_done(task, res);
703 return nfs41_sequence_done(task, res);
705 EXPORT_SYMBOL_GPL(nfs4_sequence_done);
707 int nfs41_setup_sequence(struct nfs4_session *session,
708 struct nfs4_sequence_args *args,
709 struct nfs4_sequence_res *res,
710 struct rpc_task *task)
712 struct nfs4_slot *slot;
713 struct nfs4_slot_table *tbl;
715 dprintk("--> %s\n", __func__);
716 /* slot already allocated? */
717 if (res->sr_slot != NULL)
720 tbl = &session->fc_slot_table;
722 task->tk_timeout = 0;
724 spin_lock(&tbl->slot_tbl_lock);
725 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
726 !args->sa_privileged) {
727 /* The state manager will wait until the slot table is empty */
728 dprintk("%s session is draining\n", __func__);
732 slot = nfs4_alloc_slot(tbl);
734 /* If out of memory, try again in 1/4 second */
735 if (slot == ERR_PTR(-ENOMEM))
736 task->tk_timeout = HZ >> 2;
737 dprintk("<-- %s: no free slots\n", __func__);
740 spin_unlock(&tbl->slot_tbl_lock);
742 args->sa_slot = slot;
744 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
745 slot->slot_nr, slot->seq_nr);
748 res->sr_timestamp = jiffies;
749 res->sr_status_flags = 0;
751 * sr_status is only set in decode_sequence, and so will remain
752 * set to 1 if an rpc level failure occurs.
755 trace_nfs4_setup_sequence(session, args);
757 rpc_call_start(task);
760 /* Privileged tasks are queued with top priority */
761 if (args->sa_privileged)
762 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
763 NULL, RPC_PRIORITY_PRIVILEGED);
765 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
766 spin_unlock(&tbl->slot_tbl_lock);
769 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
771 static int nfs4_setup_sequence(const struct nfs_server *server,
772 struct nfs4_sequence_args *args,
773 struct nfs4_sequence_res *res,
774 struct rpc_task *task)
776 struct nfs4_session *session = nfs4_get_session(server);
780 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
783 dprintk("--> %s clp %p session %p sr_slot %u\n",
784 __func__, session->clp, session, res->sr_slot ?
785 res->sr_slot->slot_nr : NFS4_NO_SLOT);
787 ret = nfs41_setup_sequence(session, args, res, task);
789 dprintk("<-- %s status=%d\n", __func__, ret);
793 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
795 struct nfs4_call_sync_data *data = calldata;
796 struct nfs4_session *session = nfs4_get_session(data->seq_server);
798 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
800 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
803 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
805 struct nfs4_call_sync_data *data = calldata;
807 nfs41_sequence_done(task, data->seq_res);
810 static const struct rpc_call_ops nfs41_call_sync_ops = {
811 .rpc_call_prepare = nfs41_call_sync_prepare,
812 .rpc_call_done = nfs41_call_sync_done,
815 #else /* !CONFIG_NFS_V4_1 */
817 static int nfs4_setup_sequence(const struct nfs_server *server,
818 struct nfs4_sequence_args *args,
819 struct nfs4_sequence_res *res,
820 struct rpc_task *task)
822 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
826 int nfs4_sequence_done(struct rpc_task *task,
827 struct nfs4_sequence_res *res)
829 return nfs40_sequence_done(task, res);
831 EXPORT_SYMBOL_GPL(nfs4_sequence_done);
833 #endif /* !CONFIG_NFS_V4_1 */
835 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
837 struct nfs4_call_sync_data *data = calldata;
838 nfs4_setup_sequence(data->seq_server,
839 data->seq_args, data->seq_res, task);
842 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
844 struct nfs4_call_sync_data *data = calldata;
845 nfs4_sequence_done(task, data->seq_res);
848 static const struct rpc_call_ops nfs40_call_sync_ops = {
849 .rpc_call_prepare = nfs40_call_sync_prepare,
850 .rpc_call_done = nfs40_call_sync_done,
853 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
854 struct nfs_server *server,
855 struct rpc_message *msg,
856 struct nfs4_sequence_args *args,
857 struct nfs4_sequence_res *res)
860 struct rpc_task *task;
861 struct nfs_client *clp = server->nfs_client;
862 struct nfs4_call_sync_data data = {
863 .seq_server = server,
867 struct rpc_task_setup task_setup = {
870 .callback_ops = clp->cl_mvops->call_sync_ops,
871 .callback_data = &data
874 task = rpc_run_task(&task_setup);
878 ret = task->tk_status;
884 int nfs4_call_sync(struct rpc_clnt *clnt,
885 struct nfs_server *server,
886 struct rpc_message *msg,
887 struct nfs4_sequence_args *args,
888 struct nfs4_sequence_res *res,
891 nfs4_init_sequence(args, res, cache_reply);
892 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
895 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
897 struct nfs_inode *nfsi = NFS_I(dir);
899 spin_lock(&dir->i_lock);
900 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
901 if (!cinfo->atomic || cinfo->before != dir->i_version)
902 nfs_force_lookup_revalidate(dir);
903 dir->i_version = cinfo->after;
904 nfs_fscache_invalidate(dir);
905 spin_unlock(&dir->i_lock);
908 struct nfs4_opendata {
910 struct nfs_openargs o_arg;
911 struct nfs_openres o_res;
912 struct nfs_open_confirmargs c_arg;
913 struct nfs_open_confirmres c_res;
914 struct nfs4_string owner_name;
915 struct nfs4_string group_name;
916 struct nfs_fattr f_attr;
917 struct nfs4_label *f_label;
919 struct dentry *dentry;
920 struct nfs4_state_owner *owner;
921 struct nfs4_state *state;
923 unsigned long timestamp;
924 unsigned int rpc_done : 1;
925 unsigned int file_created : 1;
926 unsigned int is_recover : 1;
931 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
932 int err, struct nfs4_exception *exception)
936 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
938 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
939 exception->retry = 1;
944 nfs4_map_atomic_open_share(struct nfs_server *server,
945 fmode_t fmode, int openflags)
949 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
951 res = NFS4_SHARE_ACCESS_READ;
954 res = NFS4_SHARE_ACCESS_WRITE;
956 case FMODE_READ|FMODE_WRITE:
957 res = NFS4_SHARE_ACCESS_BOTH;
959 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
961 /* Want no delegation if we're using O_DIRECT */
962 if (openflags & O_DIRECT)
963 res |= NFS4_SHARE_WANT_NO_DELEG;
968 static enum open_claim_type4
969 nfs4_map_atomic_open_claim(struct nfs_server *server,
970 enum open_claim_type4 claim)
972 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
977 case NFS4_OPEN_CLAIM_FH:
978 return NFS4_OPEN_CLAIM_NULL;
979 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
980 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
981 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
982 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
986 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
988 p->o_res.f_attr = &p->f_attr;
989 p->o_res.f_label = p->f_label;
990 p->o_res.seqid = p->o_arg.seqid;
991 p->c_res.seqid = p->c_arg.seqid;
992 p->o_res.server = p->o_arg.server;
993 p->o_res.access_request = p->o_arg.access;
994 nfs_fattr_init(&p->f_attr);
995 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
998 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
999 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
1000 const struct iattr *attrs,
1001 struct nfs4_label *label,
1002 enum open_claim_type4 claim,
1005 struct dentry *parent = dget_parent(dentry);
1006 struct inode *dir = parent->d_inode;
1007 struct nfs_server *server = NFS_SERVER(dir);
1008 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1009 struct nfs4_opendata *p;
1011 p = kzalloc(sizeof(*p), gfp_mask);
1015 p->f_label = nfs4_label_alloc(server, gfp_mask);
1016 if (IS_ERR(p->f_label))
1019 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1020 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
1021 if (IS_ERR(p->o_arg.seqid))
1022 goto err_free_label;
1023 nfs_sb_active(dentry->d_sb);
1024 p->dentry = dget(dentry);
1027 atomic_inc(&sp->so_count);
1028 p->o_arg.open_flags = flags;
1029 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
1030 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1032 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1033 * will return permission denied for all bits until close */
1034 if (!(flags & O_EXCL)) {
1035 /* ask server to check for all possible rights as results
1037 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1038 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
1040 p->o_arg.clientid = server->nfs_client->cl_clientid;
1041 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1042 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
1043 p->o_arg.name = &dentry->d_name;
1044 p->o_arg.server = server;
1045 p->o_arg.bitmask = nfs4_bitmask(server, label);
1046 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1047 p->o_arg.label = label;
1048 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1049 switch (p->o_arg.claim) {
1050 case NFS4_OPEN_CLAIM_NULL:
1051 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1052 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1053 p->o_arg.fh = NFS_FH(dir);
1055 case NFS4_OPEN_CLAIM_PREVIOUS:
1056 case NFS4_OPEN_CLAIM_FH:
1057 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1058 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1059 p->o_arg.fh = NFS_FH(dentry->d_inode);
1061 if (attrs != NULL && attrs->ia_valid != 0) {
1064 p->o_arg.u.attrs = &p->attrs;
1065 memcpy(&p->attrs, attrs, sizeof(p->attrs));
1068 verf[1] = current->pid;
1069 memcpy(p->o_arg.u.verifier.data, verf,
1070 sizeof(p->o_arg.u.verifier.data));
1072 p->c_arg.fh = &p->o_res.fh;
1073 p->c_arg.stateid = &p->o_res.stateid;
1074 p->c_arg.seqid = p->o_arg.seqid;
1075 nfs4_init_opendata_res(p);
1076 kref_init(&p->kref);
1080 nfs4_label_free(p->f_label);
1088 static void nfs4_opendata_free(struct kref *kref)
1090 struct nfs4_opendata *p = container_of(kref,
1091 struct nfs4_opendata, kref);
1092 struct super_block *sb = p->dentry->d_sb;
1094 nfs_free_seqid(p->o_arg.seqid);
1095 if (p->state != NULL)
1096 nfs4_put_open_state(p->state);
1097 nfs4_put_state_owner(p->owner);
1099 nfs4_label_free(p->f_label);
1103 nfs_sb_deactive(sb);
1104 nfs_fattr_free_names(&p->f_attr);
1105 kfree(p->f_attr.mdsthreshold);
1109 static void nfs4_opendata_put(struct nfs4_opendata *p)
1112 kref_put(&p->kref, nfs4_opendata_free);
1115 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1119 ret = rpc_wait_for_completion_task(task);
1123 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
1127 if (open_mode & (O_EXCL|O_TRUNC))
1129 switch (mode & (FMODE_READ|FMODE_WRITE)) {
1131 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1132 && state->n_rdonly != 0;
1135 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1136 && state->n_wronly != 0;
1138 case FMODE_READ|FMODE_WRITE:
1139 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1140 && state->n_rdwr != 0;
1146 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
1148 if (delegation == NULL)
1150 if ((delegation->type & fmode) != fmode)
1152 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1154 nfs_mark_delegation_referenced(delegation);
1158 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
1167 case FMODE_READ|FMODE_WRITE:
1170 nfs4_state_set_mode_locked(state, state->state | fmode);
1173 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1175 struct nfs_client *clp = state->owner->so_server->nfs_client;
1176 bool need_recover = false;
1178 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1179 need_recover = true;
1180 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1181 need_recover = true;
1182 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1183 need_recover = true;
1185 nfs4_state_mark_reclaim_nograce(clp, state);
1188 static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1189 nfs4_stateid *stateid)
1191 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1193 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1194 nfs_test_and_clear_all_open_stateid(state);
1197 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1202 static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1204 if (state->n_wronly)
1205 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1206 if (state->n_rdonly)
1207 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1209 set_bit(NFS_O_RDWR_STATE, &state->flags);
1212 static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1213 nfs4_stateid *stateid, fmode_t fmode)
1215 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1216 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1218 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1221 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1224 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1225 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1226 clear_bit(NFS_OPEN_STATE, &state->flags);
1228 if (stateid == NULL)
1230 /* Handle races with OPEN */
1231 if (!nfs4_stateid_match_other(stateid, &state->open_stateid) ||
1232 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
1233 nfs_resync_open_stateid_locked(state);
1236 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1237 nfs4_stateid_copy(&state->stateid, stateid);
1238 nfs4_stateid_copy(&state->open_stateid, stateid);
1241 static void nfs_clear_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1243 write_seqlock(&state->seqlock);
1244 nfs_clear_open_stateid_locked(state, stateid, fmode);
1245 write_sequnlock(&state->seqlock);
1246 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1247 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1250 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1254 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1257 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1259 case FMODE_READ|FMODE_WRITE:
1260 set_bit(NFS_O_RDWR_STATE, &state->flags);
1262 if (!nfs_need_update_open_stateid(state, stateid))
1264 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1265 nfs4_stateid_copy(&state->stateid, stateid);
1266 nfs4_stateid_copy(&state->open_stateid, stateid);
1269 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1272 * Protect the call to nfs4_state_set_mode_locked and
1273 * serialise the stateid update
1275 write_seqlock(&state->seqlock);
1276 if (deleg_stateid != NULL) {
1277 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1278 set_bit(NFS_DELEGATED_STATE, &state->flags);
1280 if (open_stateid != NULL)
1281 nfs_set_open_stateid_locked(state, open_stateid, fmode);
1282 write_sequnlock(&state->seqlock);
1283 spin_lock(&state->owner->so_lock);
1284 update_open_stateflags(state, fmode);
1285 spin_unlock(&state->owner->so_lock);
1288 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
1290 struct nfs_inode *nfsi = NFS_I(state->inode);
1291 struct nfs_delegation *deleg_cur;
1294 fmode &= (FMODE_READ|FMODE_WRITE);
1297 deleg_cur = rcu_dereference(nfsi->delegation);
1298 if (deleg_cur == NULL)
1301 spin_lock(&deleg_cur->lock);
1302 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
1303 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
1304 (deleg_cur->type & fmode) != fmode)
1305 goto no_delegation_unlock;
1307 if (delegation == NULL)
1308 delegation = &deleg_cur->stateid;
1309 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1310 goto no_delegation_unlock;
1312 nfs_mark_delegation_referenced(deleg_cur);
1313 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1315 no_delegation_unlock:
1316 spin_unlock(&deleg_cur->lock);
1320 if (!ret && open_stateid != NULL) {
1321 __update_open_stateid(state, open_stateid, NULL, fmode);
1324 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1325 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1330 static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1331 const nfs4_stateid *stateid)
1333 struct nfs4_state *state = lsp->ls_state;
1336 spin_lock(&state->state_lock);
1337 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1339 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1341 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1344 spin_unlock(&state->state_lock);
1348 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1350 struct nfs_delegation *delegation;
1353 delegation = rcu_dereference(NFS_I(inode)->delegation);
1354 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1359 nfs4_inode_return_delegation(inode);
1362 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1364 struct nfs4_state *state = opendata->state;
1365 struct nfs_inode *nfsi = NFS_I(state->inode);
1366 struct nfs_delegation *delegation;
1367 int open_mode = opendata->o_arg.open_flags;
1368 fmode_t fmode = opendata->o_arg.fmode;
1369 nfs4_stateid stateid;
1373 spin_lock(&state->owner->so_lock);
1374 if (can_open_cached(state, fmode, open_mode)) {
1375 update_open_stateflags(state, fmode);
1376 spin_unlock(&state->owner->so_lock);
1377 goto out_return_state;
1379 spin_unlock(&state->owner->so_lock);
1381 delegation = rcu_dereference(nfsi->delegation);
1382 if (!can_open_delegated(delegation, fmode)) {
1386 /* Save the delegation */
1387 nfs4_stateid_copy(&stateid, &delegation->stateid);
1389 nfs_release_seqid(opendata->o_arg.seqid);
1390 if (!opendata->is_recover) {
1391 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1397 /* Try to update the stateid using the delegation */
1398 if (update_open_stateid(state, NULL, &stateid, fmode))
1399 goto out_return_state;
1402 return ERR_PTR(ret);
1404 atomic_inc(&state->count);
1409 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1411 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1412 struct nfs_delegation *delegation;
1413 int delegation_flags = 0;
1416 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1418 delegation_flags = delegation->flags;
1420 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1421 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1422 "returning a delegation for "
1423 "OPEN(CLAIM_DELEGATE_CUR)\n",
1425 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1426 nfs_inode_set_delegation(state->inode,
1427 data->owner->so_cred,
1430 nfs_inode_reclaim_delegation(state->inode,
1431 data->owner->so_cred,
1436 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1437 * and update the nfs4_state.
1439 static struct nfs4_state *
1440 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1442 struct inode *inode = data->state->inode;
1443 struct nfs4_state *state = data->state;
1446 if (!data->rpc_done) {
1447 if (data->rpc_status) {
1448 ret = data->rpc_status;
1451 /* cached opens have already been processed */
1455 ret = nfs_refresh_inode(inode, &data->f_attr);
1459 if (data->o_res.delegation_type != 0)
1460 nfs4_opendata_check_deleg(data, state);
1462 update_open_stateid(state, &data->o_res.stateid, NULL,
1464 atomic_inc(&state->count);
1468 return ERR_PTR(ret);
1472 static struct nfs4_state *
1473 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1475 struct inode *inode;
1476 struct nfs4_state *state = NULL;
1479 if (!data->rpc_done) {
1480 state = nfs4_try_open_cached(data);
1485 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1487 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1488 ret = PTR_ERR(inode);
1492 state = nfs4_get_open_state(inode, data->owner);
1495 if (data->o_res.delegation_type != 0)
1496 nfs4_opendata_check_deleg(data, state);
1497 update_open_stateid(state, &data->o_res.stateid, NULL,
1501 nfs_release_seqid(data->o_arg.seqid);
1506 return ERR_PTR(ret);
1509 static struct nfs4_state *
1510 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1512 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1513 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1514 return _nfs4_opendata_to_nfs4_state(data);
1517 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1519 struct nfs_inode *nfsi = NFS_I(state->inode);
1520 struct nfs_open_context *ctx;
1522 spin_lock(&state->inode->i_lock);
1523 list_for_each_entry(ctx, &nfsi->open_files, list) {
1524 if (ctx->state != state)
1526 get_nfs_open_context(ctx);
1527 spin_unlock(&state->inode->i_lock);
1530 spin_unlock(&state->inode->i_lock);
1531 return ERR_PTR(-ENOENT);
1534 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1535 struct nfs4_state *state, enum open_claim_type4 claim)
1537 struct nfs4_opendata *opendata;
1539 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1540 NULL, NULL, claim, GFP_NOFS);
1541 if (opendata == NULL)
1542 return ERR_PTR(-ENOMEM);
1543 opendata->state = state;
1544 atomic_inc(&state->count);
1548 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1550 struct nfs4_state *newstate;
1553 opendata->o_arg.open_flags = 0;
1554 opendata->o_arg.fmode = fmode;
1555 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1556 NFS_SB(opendata->dentry->d_sb),
1558 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1559 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1560 nfs4_init_opendata_res(opendata);
1561 ret = _nfs4_recover_proc_open(opendata);
1564 newstate = nfs4_opendata_to_nfs4_state(opendata);
1565 if (IS_ERR(newstate))
1566 return PTR_ERR(newstate);
1567 nfs4_close_state(newstate, fmode);
1572 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1574 struct nfs4_state *newstate;
1577 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1578 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1579 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1580 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1581 /* memory barrier prior to reading state->n_* */
1582 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1583 clear_bit(NFS_OPEN_STATE, &state->flags);
1585 if (state->n_rdwr != 0) {
1586 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1589 if (newstate != state)
1592 if (state->n_wronly != 0) {
1593 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1596 if (newstate != state)
1599 if (state->n_rdonly != 0) {
1600 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1603 if (newstate != state)
1607 * We may have performed cached opens for all three recoveries.
1608 * Check if we need to update the current stateid.
1610 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1611 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1612 write_seqlock(&state->seqlock);
1613 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1614 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1615 write_sequnlock(&state->seqlock);
1622 * reclaim state on the server after a reboot.
1624 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1626 struct nfs_delegation *delegation;
1627 struct nfs4_opendata *opendata;
1628 fmode_t delegation_type = 0;
1631 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1632 NFS4_OPEN_CLAIM_PREVIOUS);
1633 if (IS_ERR(opendata))
1634 return PTR_ERR(opendata);
1636 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1637 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1638 delegation_type = delegation->type;
1640 opendata->o_arg.u.delegation_type = delegation_type;
1641 status = nfs4_open_recover(opendata, state);
1642 nfs4_opendata_put(opendata);
1646 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1648 struct nfs_server *server = NFS_SERVER(state->inode);
1649 struct nfs4_exception exception = { };
1652 err = _nfs4_do_open_reclaim(ctx, state);
1653 trace_nfs4_open_reclaim(ctx, 0, err);
1654 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1656 if (err != -NFS4ERR_DELAY)
1658 nfs4_handle_exception(server, err, &exception);
1659 } while (exception.retry);
1663 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1665 struct nfs_open_context *ctx;
1668 ctx = nfs4_state_find_open_context(state);
1671 ret = nfs4_do_open_reclaim(ctx, state);
1672 put_nfs_open_context(ctx);
1676 static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1680 printk(KERN_ERR "NFS: %s: unhandled error "
1681 "%d.\n", __func__, err);
1686 case -NFS4ERR_BADSESSION:
1687 case -NFS4ERR_BADSLOT:
1688 case -NFS4ERR_BAD_HIGH_SLOT:
1689 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1690 case -NFS4ERR_DEADSESSION:
1691 set_bit(NFS_DELEGATED_STATE, &state->flags);
1692 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1694 case -NFS4ERR_STALE_CLIENTID:
1695 case -NFS4ERR_STALE_STATEID:
1696 set_bit(NFS_DELEGATED_STATE, &state->flags);
1697 case -NFS4ERR_EXPIRED:
1698 /* Don't recall a delegation if it was lost */
1699 nfs4_schedule_lease_recovery(server->nfs_client);
1701 case -NFS4ERR_MOVED:
1702 nfs4_schedule_migration_recovery(server);
1704 case -NFS4ERR_LEASE_MOVED:
1705 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1707 case -NFS4ERR_DELEG_REVOKED:
1708 case -NFS4ERR_ADMIN_REVOKED:
1709 case -NFS4ERR_BAD_STATEID:
1710 case -NFS4ERR_OPENMODE:
1711 nfs_inode_find_state_and_recover(state->inode,
1713 nfs4_schedule_stateid_recovery(server, state);
1715 case -NFS4ERR_DELAY:
1716 case -NFS4ERR_GRACE:
1717 set_bit(NFS_DELEGATED_STATE, &state->flags);
1721 case -NFS4ERR_DENIED:
1722 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1728 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1730 struct nfs_server *server = NFS_SERVER(state->inode);
1731 struct nfs4_opendata *opendata;
1734 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1735 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1736 if (IS_ERR(opendata))
1737 return PTR_ERR(opendata);
1738 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1739 err = nfs4_open_recover(opendata, state);
1740 nfs4_opendata_put(opendata);
1741 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1744 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1746 struct nfs4_opendata *data = calldata;
1748 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
1749 &data->c_arg.seq_args, &data->c_res.seq_res, task);
1752 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1754 struct nfs4_opendata *data = calldata;
1756 nfs40_sequence_done(task, &data->c_res.seq_res);
1758 data->rpc_status = task->tk_status;
1759 if (data->rpc_status == 0) {
1760 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1761 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1762 renew_lease(data->o_res.server, data->timestamp);
1767 static void nfs4_open_confirm_release(void *calldata)
1769 struct nfs4_opendata *data = calldata;
1770 struct nfs4_state *state = NULL;
1772 /* If this request hasn't been cancelled, do nothing */
1773 if (data->cancelled == 0)
1775 /* In case of error, no cleanup! */
1776 if (!data->rpc_done)
1778 state = nfs4_opendata_to_nfs4_state(data);
1780 nfs4_close_state(state, data->o_arg.fmode);
1782 nfs4_opendata_put(data);
1785 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1786 .rpc_call_prepare = nfs4_open_confirm_prepare,
1787 .rpc_call_done = nfs4_open_confirm_done,
1788 .rpc_release = nfs4_open_confirm_release,
1792 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1794 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1796 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1797 struct rpc_task *task;
1798 struct rpc_message msg = {
1799 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1800 .rpc_argp = &data->c_arg,
1801 .rpc_resp = &data->c_res,
1802 .rpc_cred = data->owner->so_cred,
1804 struct rpc_task_setup task_setup_data = {
1805 .rpc_client = server->client,
1806 .rpc_message = &msg,
1807 .callback_ops = &nfs4_open_confirm_ops,
1808 .callback_data = data,
1809 .workqueue = nfsiod_workqueue,
1810 .flags = RPC_TASK_ASYNC,
1814 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
1815 kref_get(&data->kref);
1817 data->rpc_status = 0;
1818 data->timestamp = jiffies;
1819 task = rpc_run_task(&task_setup_data);
1821 return PTR_ERR(task);
1822 status = nfs4_wait_for_completion_rpc_task(task);
1824 data->cancelled = 1;
1827 status = data->rpc_status;
1832 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1834 struct nfs4_opendata *data = calldata;
1835 struct nfs4_state_owner *sp = data->owner;
1836 struct nfs_client *clp = sp->so_server->nfs_client;
1838 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1841 * Check if we still need to send an OPEN call, or if we can use
1842 * a delegation instead.
1844 if (data->state != NULL) {
1845 struct nfs_delegation *delegation;
1847 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1850 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1851 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1852 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
1853 can_open_delegated(delegation, data->o_arg.fmode))
1854 goto unlock_no_action;
1857 /* Update client id. */
1858 data->o_arg.clientid = clp->cl_clientid;
1859 switch (data->o_arg.claim) {
1860 case NFS4_OPEN_CLAIM_PREVIOUS:
1861 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1862 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1863 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
1864 case NFS4_OPEN_CLAIM_FH:
1865 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1866 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1868 data->timestamp = jiffies;
1869 if (nfs4_setup_sequence(data->o_arg.server,
1870 &data->o_arg.seq_args,
1871 &data->o_res.seq_res,
1873 nfs_release_seqid(data->o_arg.seqid);
1875 /* Set the create mode (note dependency on the session type) */
1876 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1877 if (data->o_arg.open_flags & O_EXCL) {
1878 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1879 if (nfs4_has_persistent_session(clp))
1880 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1881 else if (clp->cl_mvops->minor_version > 0)
1882 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1888 task->tk_action = NULL;
1890 nfs4_sequence_done(task, &data->o_res.seq_res);
1893 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1895 struct nfs4_opendata *data = calldata;
1897 data->rpc_status = task->tk_status;
1899 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1902 if (task->tk_status == 0) {
1903 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1904 switch (data->o_res.f_attr->mode & S_IFMT) {
1908 data->rpc_status = -ELOOP;
1911 data->rpc_status = -EISDIR;
1914 data->rpc_status = -ENOTDIR;
1917 renew_lease(data->o_res.server, data->timestamp);
1918 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1919 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1924 static void nfs4_open_release(void *calldata)
1926 struct nfs4_opendata *data = calldata;
1927 struct nfs4_state *state = NULL;
1929 /* If this request hasn't been cancelled, do nothing */
1930 if (data->cancelled == 0)
1932 /* In case of error, no cleanup! */
1933 if (data->rpc_status != 0 || !data->rpc_done)
1935 /* In case we need an open_confirm, no cleanup! */
1936 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1938 state = nfs4_opendata_to_nfs4_state(data);
1940 nfs4_close_state(state, data->o_arg.fmode);
1942 nfs4_opendata_put(data);
1945 static const struct rpc_call_ops nfs4_open_ops = {
1946 .rpc_call_prepare = nfs4_open_prepare,
1947 .rpc_call_done = nfs4_open_done,
1948 .rpc_release = nfs4_open_release,
1951 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1953 struct inode *dir = data->dir->d_inode;
1954 struct nfs_server *server = NFS_SERVER(dir);
1955 struct nfs_openargs *o_arg = &data->o_arg;
1956 struct nfs_openres *o_res = &data->o_res;
1957 struct rpc_task *task;
1958 struct rpc_message msg = {
1959 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1962 .rpc_cred = data->owner->so_cred,
1964 struct rpc_task_setup task_setup_data = {
1965 .rpc_client = server->client,
1966 .rpc_message = &msg,
1967 .callback_ops = &nfs4_open_ops,
1968 .callback_data = data,
1969 .workqueue = nfsiod_workqueue,
1970 .flags = RPC_TASK_ASYNC,
1974 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1975 kref_get(&data->kref);
1977 data->rpc_status = 0;
1978 data->cancelled = 0;
1979 data->is_recover = 0;
1981 nfs4_set_sequence_privileged(&o_arg->seq_args);
1982 data->is_recover = 1;
1984 task = rpc_run_task(&task_setup_data);
1986 return PTR_ERR(task);
1987 status = nfs4_wait_for_completion_rpc_task(task);
1989 data->cancelled = 1;
1992 status = data->rpc_status;
1998 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2000 struct inode *dir = data->dir->d_inode;
2001 struct nfs_openres *o_res = &data->o_res;
2004 status = nfs4_run_open_task(data, 1);
2005 if (status != 0 || !data->rpc_done)
2008 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2010 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2011 status = _nfs4_proc_open_confirm(data);
2020 * Additional permission checks in order to distinguish between an
2021 * open for read, and an open for execute. This works around the
2022 * fact that NFSv4 OPEN treats read and execute permissions as being
2024 * Note that in the non-execute case, we want to turn off permission
2025 * checking if we just created a new file (POSIX open() semantics).
2027 static int nfs4_opendata_access(struct rpc_cred *cred,
2028 struct nfs4_opendata *opendata,
2029 struct nfs4_state *state, fmode_t fmode,
2032 struct nfs_access_entry cache;
2035 /* access call failed or for some reason the server doesn't
2036 * support any access modes -- defer access call until later */
2037 if (opendata->o_res.access_supported == 0)
2042 * Use openflags to check for exec, because fmode won't
2043 * always have FMODE_EXEC set when file open for exec.
2045 if (openflags & __FMODE_EXEC) {
2046 /* ONLY check for exec rights */
2048 } else if ((fmode & FMODE_READ) && !opendata->file_created)
2052 cache.jiffies = jiffies;
2053 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2054 nfs_access_add_cache(state->inode, &cache);
2056 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
2059 /* even though OPEN succeeded, access is denied. Close the file */
2060 nfs4_close_state(state, fmode);
2065 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2067 static int _nfs4_proc_open(struct nfs4_opendata *data)
2069 struct inode *dir = data->dir->d_inode;
2070 struct nfs_server *server = NFS_SERVER(dir);
2071 struct nfs_openargs *o_arg = &data->o_arg;
2072 struct nfs_openres *o_res = &data->o_res;
2075 status = nfs4_run_open_task(data, 0);
2076 if (!data->rpc_done)
2079 if (status == -NFS4ERR_BADNAME &&
2080 !(o_arg->open_flags & O_CREAT))
2085 nfs_fattr_map_and_free_names(server, &data->f_attr);
2087 if (o_arg->open_flags & O_CREAT) {
2088 update_changeattr(dir, &o_res->cinfo);
2089 if (o_arg->open_flags & O_EXCL)
2090 data->file_created = 1;
2091 else if (o_res->cinfo.before != o_res->cinfo.after)
2092 data->file_created = 1;
2094 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2095 server->caps &= ~NFS_CAP_POSIX_LOCK;
2096 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2097 status = _nfs4_proc_open_confirm(data);
2101 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
2102 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
2106 static int nfs4_recover_expired_lease(struct nfs_server *server)
2108 return nfs4_client_recover_expired_lease(server->nfs_client);
2113 * reclaim state on the server after a network partition.
2114 * Assumes caller holds the appropriate lock
2116 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2118 struct nfs4_opendata *opendata;
2121 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2122 NFS4_OPEN_CLAIM_FH);
2123 if (IS_ERR(opendata))
2124 return PTR_ERR(opendata);
2125 ret = nfs4_open_recover(opendata, state);
2127 d_drop(ctx->dentry);
2128 nfs4_opendata_put(opendata);
2132 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2134 struct nfs_server *server = NFS_SERVER(state->inode);
2135 struct nfs4_exception exception = { };
2139 err = _nfs4_open_expired(ctx, state);
2140 trace_nfs4_open_expired(ctx, 0, err);
2141 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2146 case -NFS4ERR_GRACE:
2147 case -NFS4ERR_DELAY:
2148 nfs4_handle_exception(server, err, &exception);
2151 } while (exception.retry);
2156 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2158 struct nfs_open_context *ctx;
2161 ctx = nfs4_state_find_open_context(state);
2164 ret = nfs4_do_open_expired(ctx, state);
2165 put_nfs_open_context(ctx);
2169 static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2171 nfs_remove_bad_delegation(state->inode);
2172 write_seqlock(&state->seqlock);
2173 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2174 write_sequnlock(&state->seqlock);
2175 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2178 static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2180 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2181 nfs_finish_clear_delegation_stateid(state);
2184 static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2186 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2187 nfs40_clear_delegation_stateid(state);
2188 return nfs4_open_expired(sp, state);
2191 #if defined(CONFIG_NFS_V4_1)
2192 static void nfs41_check_delegation_stateid(struct nfs4_state *state)
2194 struct nfs_server *server = NFS_SERVER(state->inode);
2195 nfs4_stateid stateid;
2196 struct nfs_delegation *delegation;
2197 struct rpc_cred *cred;
2200 /* Get the delegation credential for use by test/free_stateid */
2202 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2203 if (delegation == NULL) {
2208 nfs4_stateid_copy(&stateid, &delegation->stateid);
2209 cred = get_rpccred(delegation->cred);
2211 status = nfs41_test_stateid(server, &stateid, cred);
2212 trace_nfs4_test_delegation_stateid(state, NULL, status);
2214 if (status != NFS_OK) {
2215 /* Free the stateid unless the server explicitly
2216 * informs us the stateid is unrecognized. */
2217 if (status != -NFS4ERR_BAD_STATEID)
2218 nfs41_free_stateid(server, &stateid, cred);
2219 nfs_finish_clear_delegation_stateid(state);
2226 * nfs41_check_open_stateid - possibly free an open stateid
2228 * @state: NFSv4 state for an inode
2230 * Returns NFS_OK if recovery for this stateid is now finished.
2231 * Otherwise a negative NFS4ERR value is returned.
2233 static int nfs41_check_open_stateid(struct nfs4_state *state)
2235 struct nfs_server *server = NFS_SERVER(state->inode);
2236 nfs4_stateid *stateid = &state->open_stateid;
2237 struct rpc_cred *cred = state->owner->so_cred;
2240 /* If a state reset has been done, test_stateid is unneeded */
2241 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2242 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2243 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2244 return -NFS4ERR_BAD_STATEID;
2246 status = nfs41_test_stateid(server, stateid, cred);
2247 trace_nfs4_test_open_stateid(state, NULL, status);
2248 if (status != NFS_OK) {
2249 /* Free the stateid unless the server explicitly
2250 * informs us the stateid is unrecognized. */
2251 if (status != -NFS4ERR_BAD_STATEID)
2252 nfs41_free_stateid(server, stateid, cred);
2254 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2255 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2256 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2257 clear_bit(NFS_OPEN_STATE, &state->flags);
2262 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2266 nfs41_check_delegation_stateid(state);
2267 status = nfs41_check_open_stateid(state);
2268 if (status != NFS_OK)
2269 status = nfs4_open_expired(sp, state);
2275 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2276 * fields corresponding to attributes that were used to store the verifier.
2277 * Make sure we clobber those fields in the later setattr call
2279 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2281 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2282 !(sattr->ia_valid & ATTR_ATIME_SET))
2283 sattr->ia_valid |= ATTR_ATIME;
2285 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2286 !(sattr->ia_valid & ATTR_MTIME_SET))
2287 sattr->ia_valid |= ATTR_MTIME;
2290 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2293 struct nfs_open_context *ctx)
2295 struct nfs4_state_owner *sp = opendata->owner;
2296 struct nfs_server *server = sp->so_server;
2297 struct dentry *dentry;
2298 struct nfs4_state *state;
2302 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2304 ret = _nfs4_proc_open(opendata);
2308 state = nfs4_opendata_to_nfs4_state(opendata);
2309 ret = PTR_ERR(state);
2312 if (server->caps & NFS_CAP_POSIX_LOCK)
2313 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2315 dentry = opendata->dentry;
2316 if (dentry->d_inode == NULL) {
2317 /* FIXME: Is this d_drop() ever needed? */
2319 dentry = d_add_unique(dentry, igrab(state->inode));
2320 if (dentry == NULL) {
2321 dentry = opendata->dentry;
2322 } else if (dentry != ctx->dentry) {
2324 ctx->dentry = dget(dentry);
2326 nfs_set_verifier(dentry,
2327 nfs_save_change_attribute(opendata->dir->d_inode));
2330 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2335 if (dentry->d_inode == state->inode) {
2336 nfs_inode_attach_open_context(ctx);
2337 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2338 nfs4_schedule_stateid_recovery(server, state);
2345 * Returns a referenced nfs4_state
2347 static int _nfs4_do_open(struct inode *dir,
2348 struct nfs_open_context *ctx,
2350 struct iattr *sattr,
2351 struct nfs4_label *label,
2354 struct nfs4_state_owner *sp;
2355 struct nfs4_state *state = NULL;
2356 struct nfs_server *server = NFS_SERVER(dir);
2357 struct nfs4_opendata *opendata;
2358 struct dentry *dentry = ctx->dentry;
2359 struct rpc_cred *cred = ctx->cred;
2360 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2361 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
2362 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
2363 struct nfs4_label *olabel = NULL;
2366 /* Protect against reboot recovery conflicts */
2368 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2370 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2373 status = nfs4_recover_expired_lease(server);
2375 goto err_put_state_owner;
2376 if (dentry->d_inode != NULL)
2377 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
2379 if (dentry->d_inode)
2380 claim = NFS4_OPEN_CLAIM_FH;
2381 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
2382 label, claim, GFP_KERNEL);
2383 if (opendata == NULL)
2384 goto err_put_state_owner;
2387 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2388 if (IS_ERR(olabel)) {
2389 status = PTR_ERR(olabel);
2390 goto err_opendata_put;
2394 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2395 if (!opendata->f_attr.mdsthreshold) {
2396 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2397 if (!opendata->f_attr.mdsthreshold)
2398 goto err_free_label;
2400 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
2402 if (dentry->d_inode != NULL)
2403 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
2405 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
2407 goto err_free_label;
2410 if ((opendata->o_arg.open_flags & O_EXCL) &&
2411 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
2412 nfs4_exclusive_attrset(opendata, sattr);
2414 nfs_fattr_init(opendata->o_res.f_attr);
2415 status = nfs4_do_setattr(state->inode, cred,
2416 opendata->o_res.f_attr, sattr,
2417 state, label, olabel);
2419 nfs_setattr_update_inode(state->inode, sattr,
2420 opendata->o_res.f_attr);
2421 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2424 if (opendata->file_created)
2425 *opened |= FILE_CREATED;
2427 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
2428 *ctx_th = opendata->f_attr.mdsthreshold;
2429 opendata->f_attr.mdsthreshold = NULL;
2432 nfs4_label_free(olabel);
2434 nfs4_opendata_put(opendata);
2435 nfs4_put_state_owner(sp);
2438 nfs4_label_free(olabel);
2440 nfs4_opendata_put(opendata);
2441 err_put_state_owner:
2442 nfs4_put_state_owner(sp);
2448 static struct nfs4_state *nfs4_do_open(struct inode *dir,
2449 struct nfs_open_context *ctx,
2451 struct iattr *sattr,
2452 struct nfs4_label *label,
2455 struct nfs_server *server = NFS_SERVER(dir);
2456 struct nfs4_exception exception = { };
2457 struct nfs4_state *res;
2461 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
2463 trace_nfs4_open_file(ctx, flags, status);
2466 /* NOTE: BAD_SEQID means the server and client disagree about the
2467 * book-keeping w.r.t. state-changing operations
2468 * (OPEN/CLOSE/LOCK/LOCKU...)
2469 * It is actually a sign of a bug on the client or on the server.
2471 * If we receive a BAD_SEQID error in the particular case of
2472 * doing an OPEN, we assume that nfs_increment_open_seqid() will
2473 * have unhashed the old state_owner for us, and that we can
2474 * therefore safely retry using a new one. We should still warn
2475 * the user though...
2477 if (status == -NFS4ERR_BAD_SEQID) {
2478 pr_warn_ratelimited("NFS: v4 server %s "
2479 " returned a bad sequence-id error!\n",
2480 NFS_SERVER(dir)->nfs_client->cl_hostname);
2481 exception.retry = 1;
2485 * BAD_STATEID on OPEN means that the server cancelled our
2486 * state before it received the OPEN_CONFIRM.
2487 * Recover by retrying the request as per the discussion
2488 * on Page 181 of RFC3530.
2490 if (status == -NFS4ERR_BAD_STATEID) {
2491 exception.retry = 1;
2494 if (status == -EAGAIN) {
2495 /* We must have found a delegation */
2496 exception.retry = 1;
2499 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2501 res = ERR_PTR(nfs4_handle_exception(server,
2502 status, &exception));
2503 } while (exception.retry);
2507 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2508 struct nfs_fattr *fattr, struct iattr *sattr,
2509 struct nfs4_state *state, struct nfs4_label *ilabel,
2510 struct nfs4_label *olabel)
2512 struct nfs_server *server = NFS_SERVER(inode);
2513 struct nfs_setattrargs arg = {
2514 .fh = NFS_FH(inode),
2517 .bitmask = server->attr_bitmask,
2520 struct nfs_setattrres res = {
2525 struct rpc_message msg = {
2526 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2531 unsigned long timestamp = jiffies;
2536 arg.bitmask = nfs4_bitmask(server, ilabel);
2538 arg.bitmask = nfs4_bitmask(server, olabel);
2540 nfs_fattr_init(fattr);
2542 /* Servers should only apply open mode checks for file size changes */
2543 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2544 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2546 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2547 /* Use that stateid */
2548 } else if (truncate && state != NULL) {
2549 struct nfs_lockowner lockowner = {
2550 .l_owner = current->files,
2551 .l_pid = current->tgid,
2553 if (!nfs4_valid_open_stateid(state))
2555 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2556 &lockowner) == -EIO)
2559 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
2561 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2562 if (status == 0 && state != NULL)
2563 renew_lease(server, timestamp);
2567 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2568 struct nfs_fattr *fattr, struct iattr *sattr,
2569 struct nfs4_state *state, struct nfs4_label *ilabel,
2570 struct nfs4_label *olabel)
2572 struct nfs_server *server = NFS_SERVER(inode);
2573 struct nfs4_exception exception = {
2579 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
2580 trace_nfs4_setattr(inode, err);
2582 case -NFS4ERR_OPENMODE:
2583 if (!(sattr->ia_valid & ATTR_SIZE)) {
2584 pr_warn_once("NFSv4: server %s is incorrectly "
2585 "applying open mode checks to "
2586 "a SETATTR that is not "
2587 "changing file size.\n",
2588 server->nfs_client->cl_hostname);
2590 if (state && !(state->state & FMODE_WRITE)) {
2592 if (sattr->ia_valid & ATTR_OPEN)
2597 err = nfs4_handle_exception(server, err, &exception);
2598 } while (exception.retry);
2603 struct nfs4_closedata {
2604 struct inode *inode;
2605 struct nfs4_state *state;
2606 struct nfs_closeargs arg;
2607 struct nfs_closeres res;
2608 struct nfs_fattr fattr;
2609 unsigned long timestamp;
2614 static void nfs4_free_closedata(void *data)
2616 struct nfs4_closedata *calldata = data;
2617 struct nfs4_state_owner *sp = calldata->state->owner;
2618 struct super_block *sb = calldata->state->inode->i_sb;
2621 pnfs_roc_release(calldata->state->inode);
2622 nfs4_put_open_state(calldata->state);
2623 nfs_free_seqid(calldata->arg.seqid);
2624 nfs4_put_state_owner(sp);
2625 nfs_sb_deactive(sb);
2629 static void nfs4_close_done(struct rpc_task *task, void *data)
2631 struct nfs4_closedata *calldata = data;
2632 struct nfs4_state *state = calldata->state;
2633 struct nfs_server *server = NFS_SERVER(calldata->inode);
2634 nfs4_stateid *res_stateid = NULL;
2636 dprintk("%s: begin!\n", __func__);
2637 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2639 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
2640 /* hmm. we are done with the inode, and in the process of freeing
2641 * the state_owner. we keep this around to process errors
2643 switch (task->tk_status) {
2645 res_stateid = &calldata->res.stateid;
2646 if (calldata->arg.fmode == 0 && calldata->roc)
2647 pnfs_roc_set_barrier(state->inode,
2648 calldata->roc_barrier);
2649 renew_lease(server, calldata->timestamp);
2651 case -NFS4ERR_ADMIN_REVOKED:
2652 case -NFS4ERR_STALE_STATEID:
2653 case -NFS4ERR_OLD_STATEID:
2654 case -NFS4ERR_BAD_STATEID:
2655 case -NFS4ERR_EXPIRED:
2656 if (!nfs4_stateid_match(&calldata->arg.stateid,
2658 rpc_restart_call_prepare(task);
2661 if (calldata->arg.fmode == 0)
2664 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
2665 rpc_restart_call_prepare(task);
2669 nfs_clear_open_stateid(state, res_stateid, calldata->arg.fmode);
2671 nfs_release_seqid(calldata->arg.seqid);
2672 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2673 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2676 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2678 struct nfs4_closedata *calldata = data;
2679 struct nfs4_state *state = calldata->state;
2680 struct inode *inode = calldata->inode;
2681 bool is_rdonly, is_wronly, is_rdwr;
2684 dprintk("%s: begin!\n", __func__);
2685 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2688 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2689 spin_lock(&state->owner->so_lock);
2690 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2691 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2692 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
2693 nfs4_stateid_copy(&calldata->arg.stateid, &state->stateid);
2694 /* Calculate the change in open mode */
2695 calldata->arg.fmode = 0;
2696 if (state->n_rdwr == 0) {
2697 if (state->n_rdonly == 0)
2698 call_close |= is_rdonly;
2700 calldata->arg.fmode |= FMODE_READ;
2701 if (state->n_wronly == 0)
2702 call_close |= is_wronly;
2704 calldata->arg.fmode |= FMODE_WRITE;
2706 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2708 if (calldata->arg.fmode == 0)
2709 call_close |= is_rdwr;
2711 if (!nfs4_valid_open_stateid(state))
2713 spin_unlock(&state->owner->so_lock);
2716 /* Note: exit _without_ calling nfs4_close_done */
2720 if (calldata->arg.fmode == 0) {
2721 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2722 if (calldata->roc &&
2723 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2724 nfs_release_seqid(calldata->arg.seqid);
2728 calldata->arg.share_access =
2729 nfs4_map_atomic_open_share(NFS_SERVER(inode),
2730 calldata->arg.fmode, 0);
2732 nfs_fattr_init(calldata->res.fattr);
2733 calldata->timestamp = jiffies;
2734 if (nfs4_setup_sequence(NFS_SERVER(inode),
2735 &calldata->arg.seq_args,
2736 &calldata->res.seq_res,
2738 nfs_release_seqid(calldata->arg.seqid);
2739 dprintk("%s: done!\n", __func__);
2742 task->tk_action = NULL;
2744 nfs4_sequence_done(task, &calldata->res.seq_res);
2747 static const struct rpc_call_ops nfs4_close_ops = {
2748 .rpc_call_prepare = nfs4_close_prepare,
2749 .rpc_call_done = nfs4_close_done,
2750 .rpc_release = nfs4_free_closedata,
2753 static bool nfs4_roc(struct inode *inode)
2755 if (!nfs_have_layout(inode))
2757 return pnfs_roc(inode);
2761 * It is possible for data to be read/written from a mem-mapped file
2762 * after the sys_close call (which hits the vfs layer as a flush).
2763 * This means that we can't safely call nfsv4 close on a file until
2764 * the inode is cleared. This in turn means that we are not good
2765 * NFSv4 citizens - we do not indicate to the server to update the file's
2766 * share state even when we are done with one of the three share
2767 * stateid's in the inode.
2769 * NOTE: Caller must be holding the sp->so_owner semaphore!
2771 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
2773 struct nfs_server *server = NFS_SERVER(state->inode);
2774 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
2775 struct nfs4_closedata *calldata;
2776 struct nfs4_state_owner *sp = state->owner;
2777 struct rpc_task *task;
2778 struct rpc_message msg = {
2779 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2780 .rpc_cred = state->owner->so_cred,
2782 struct rpc_task_setup task_setup_data = {
2783 .rpc_client = server->client,
2784 .rpc_message = &msg,
2785 .callback_ops = &nfs4_close_ops,
2786 .workqueue = nfsiod_workqueue,
2787 .flags = RPC_TASK_ASYNC,
2789 int status = -ENOMEM;
2791 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2792 &task_setup_data.rpc_client, &msg);
2794 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2795 if (calldata == NULL)
2797 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2798 calldata->inode = state->inode;
2799 calldata->state = state;
2800 calldata->arg.fh = NFS_FH(state->inode);
2801 /* Serialization for the sequence id */
2802 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
2803 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
2804 if (IS_ERR(calldata->arg.seqid))
2805 goto out_free_calldata;
2806 calldata->arg.fmode = 0;
2807 calldata->arg.bitmask = server->cache_consistency_bitmask;
2808 calldata->res.fattr = &calldata->fattr;
2809 calldata->res.seqid = calldata->arg.seqid;
2810 calldata->res.server = server;
2811 calldata->roc = nfs4_roc(state->inode);
2812 nfs_sb_active(calldata->inode->i_sb);
2814 msg.rpc_argp = &calldata->arg;
2815 msg.rpc_resp = &calldata->res;
2816 task_setup_data.callback_data = calldata;
2817 task = rpc_run_task(&task_setup_data);
2819 return PTR_ERR(task);
2822 status = rpc_wait_for_completion_task(task);
2828 nfs4_put_open_state(state);
2829 nfs4_put_state_owner(sp);
2833 static struct inode *
2834 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2835 int open_flags, struct iattr *attr, int *opened)
2837 struct nfs4_state *state;
2838 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2840 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
2842 /* Protect against concurrent sillydeletes */
2843 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
2845 nfs4_label_release_security(label);
2848 return ERR_CAST(state);
2849 return state->inode;
2852 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2854 if (ctx->state == NULL)
2857 nfs4_close_sync(ctx->state, ctx->mode);
2859 nfs4_close_state(ctx->state, ctx->mode);
2862 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2863 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
2864 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
2866 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2868 struct nfs4_server_caps_arg args = {
2871 struct nfs4_server_caps_res res = {};
2872 struct rpc_message msg = {
2873 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2879 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2881 /* Sanity check the server answers */
2882 switch (server->nfs_client->cl_minorversion) {
2884 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2885 res.attr_bitmask[2] = 0;
2888 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2891 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2893 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2894 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2895 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2896 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2897 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2898 NFS_CAP_CTIME|NFS_CAP_MTIME|
2899 NFS_CAP_SECURITY_LABEL);
2900 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2901 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2902 server->caps |= NFS_CAP_ACLS;
2903 if (res.has_links != 0)
2904 server->caps |= NFS_CAP_HARDLINKS;
2905 if (res.has_symlinks != 0)
2906 server->caps |= NFS_CAP_SYMLINKS;
2907 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2908 server->caps |= NFS_CAP_FILEID;
2909 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2910 server->caps |= NFS_CAP_MODE;
2911 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2912 server->caps |= NFS_CAP_NLINK;
2913 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2914 server->caps |= NFS_CAP_OWNER;
2915 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2916 server->caps |= NFS_CAP_OWNER_GROUP;
2917 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2918 server->caps |= NFS_CAP_ATIME;
2919 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2920 server->caps |= NFS_CAP_CTIME;
2921 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2922 server->caps |= NFS_CAP_MTIME;
2923 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
2924 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2925 server->caps |= NFS_CAP_SECURITY_LABEL;
2927 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2928 sizeof(server->attr_bitmask));
2929 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2931 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2932 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2933 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2934 server->cache_consistency_bitmask[2] = 0;
2935 server->acl_bitmask = res.acl_bitmask;
2936 server->fh_expire_type = res.fh_expire_type;
2942 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2944 struct nfs4_exception exception = { };
2947 err = nfs4_handle_exception(server,
2948 _nfs4_server_capabilities(server, fhandle),
2950 } while (exception.retry);
2954 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2955 struct nfs_fsinfo *info)
2958 struct nfs4_lookup_root_arg args = {
2961 struct nfs4_lookup_res res = {
2963 .fattr = info->fattr,
2966 struct rpc_message msg = {
2967 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2972 bitmask[0] = nfs4_fattr_bitmap[0];
2973 bitmask[1] = nfs4_fattr_bitmap[1];
2975 * Process the label in the upcoming getfattr
2977 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2979 nfs_fattr_init(info->fattr);
2980 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2983 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2984 struct nfs_fsinfo *info)
2986 struct nfs4_exception exception = { };
2989 err = _nfs4_lookup_root(server, fhandle, info);
2990 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
2993 case -NFS4ERR_WRONGSEC:
2996 err = nfs4_handle_exception(server, err, &exception);
2998 } while (exception.retry);
3003 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3004 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3006 struct rpc_auth_create_args auth_args = {
3007 .pseudoflavor = flavor,
3009 struct rpc_auth *auth;
3012 auth = rpcauth_create(&auth_args, server->client);
3017 ret = nfs4_lookup_root(server, fhandle, info);
3023 * Retry pseudoroot lookup with various security flavors. We do this when:
3025 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3026 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3028 * Returns zero on success, or a negative NFS4ERR value, or a
3029 * negative errno value.
3031 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3032 struct nfs_fsinfo *info)
3034 /* Per 3530bis 15.33.5 */
3035 static const rpc_authflavor_t flav_array[] = {
3039 RPC_AUTH_UNIX, /* courtesy */
3042 int status = -EPERM;
3045 if (server->auth_info.flavor_len > 0) {
3046 /* try each flavor specified by user */
3047 for (i = 0; i < server->auth_info.flavor_len; i++) {
3048 status = nfs4_lookup_root_sec(server, fhandle, info,
3049 server->auth_info.flavors[i]);
3050 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3055 /* no flavors specified by user, try default list */
3056 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3057 status = nfs4_lookup_root_sec(server, fhandle, info,
3059 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3066 * -EACCESS could mean that the user doesn't have correct permissions
3067 * to access the mount. It could also mean that we tried to mount
3068 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3069 * existing mount programs don't handle -EACCES very well so it should
3070 * be mapped to -EPERM instead.
3072 if (status == -EACCES)
3077 static int nfs4_do_find_root_sec(struct nfs_server *server,
3078 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3080 int mv = server->nfs_client->cl_minorversion;
3081 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3085 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3086 * @server: initialized nfs_server handle
3087 * @fhandle: we fill in the pseudo-fs root file handle
3088 * @info: we fill in an FSINFO struct
3089 * @auth_probe: probe the auth flavours
3091 * Returns zero on success, or a negative errno.
3093 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
3094 struct nfs_fsinfo *info,
3099 switch (auth_probe) {
3101 status = nfs4_lookup_root(server, fhandle, info);
3102 if (status != -NFS4ERR_WRONGSEC)
3105 status = nfs4_do_find_root_sec(server, fhandle, info);
3109 status = nfs4_server_capabilities(server, fhandle);
3111 status = nfs4_do_fsinfo(server, fhandle, info);
3113 return nfs4_map_errors(status);
3116 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3117 struct nfs_fsinfo *info)
3120 struct nfs_fattr *fattr = info->fattr;
3121 struct nfs4_label *label = NULL;
3123 error = nfs4_server_capabilities(server, mntfh);
3125 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3129 label = nfs4_label_alloc(server, GFP_KERNEL);
3131 return PTR_ERR(label);
3133 error = nfs4_proc_getattr(server, mntfh, fattr, label);
3135 dprintk("nfs4_get_root: getattr error = %d\n", -error);
3136 goto err_free_label;
3139 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3140 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3141 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3144 nfs4_label_free(label);
3150 * Get locations and (maybe) other attributes of a referral.
3151 * Note that we'll actually follow the referral later when
3152 * we detect fsid mismatch in inode revalidation
3154 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3155 const struct qstr *name, struct nfs_fattr *fattr,
3156 struct nfs_fh *fhandle)
3158 int status = -ENOMEM;
3159 struct page *page = NULL;
3160 struct nfs4_fs_locations *locations = NULL;
3162 page = alloc_page(GFP_KERNEL);
3165 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3166 if (locations == NULL)
3169 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
3174 * If the fsid didn't change, this is a migration event, not a
3175 * referral. Cause us to drop into the exception handler, which
3176 * will kick off migration recovery.
3178 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3179 dprintk("%s: server did not return a different fsid for"
3180 " a referral at %s\n", __func__, name->name);
3181 status = -NFS4ERR_MOVED;
3184 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3185 nfs_fixup_referral_attributes(&locations->fattr);
3187 /* replace the lookup nfs_fattr with the locations nfs_fattr */
3188 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
3189 memset(fhandle, 0, sizeof(struct nfs_fh));
3197 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3198 struct nfs_fattr *fattr, struct nfs4_label *label)
3200 struct nfs4_getattr_arg args = {
3202 .bitmask = server->attr_bitmask,
3204 struct nfs4_getattr_res res = {
3209 struct rpc_message msg = {
3210 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3215 args.bitmask = nfs4_bitmask(server, label);
3217 nfs_fattr_init(fattr);
3218 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3221 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3222 struct nfs_fattr *fattr, struct nfs4_label *label)
3224 struct nfs4_exception exception = { };
3227 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3228 trace_nfs4_getattr(server, fhandle, fattr, err);
3229 err = nfs4_handle_exception(server, err,
3231 } while (exception.retry);
3236 * The file is not closed if it is opened due to the a request to change
3237 * the size of the file. The open call will not be needed once the
3238 * VFS layer lookup-intents are implemented.
3240 * Close is called when the inode is destroyed.
3241 * If we haven't opened the file for O_WRONLY, we
3242 * need to in the size_change case to obtain a stateid.
3245 * Because OPEN is always done by name in nfsv4, it is
3246 * possible that we opened a different file by the same
3247 * name. We can recognize this race condition, but we
3248 * can't do anything about it besides returning an error.
3250 * This will be fixed with VFS changes (lookup-intent).
3253 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3254 struct iattr *sattr)
3256 struct inode *inode = dentry->d_inode;
3257 struct rpc_cred *cred = NULL;
3258 struct nfs4_state *state = NULL;
3259 struct nfs4_label *label = NULL;
3262 if (pnfs_ld_layoutret_on_setattr(inode) &&
3263 sattr->ia_valid & ATTR_SIZE &&
3264 sattr->ia_size < i_size_read(inode))
3265 pnfs_commit_and_return_layout(inode);
3267 nfs_fattr_init(fattr);
3269 /* Deal with open(O_TRUNC) */
3270 if (sattr->ia_valid & ATTR_OPEN)
3271 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
3273 /* Optimization: if the end result is no change, don't RPC */
3274 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
3277 /* Search for an existing open(O_WRITE) file */
3278 if (sattr->ia_valid & ATTR_FILE) {
3279 struct nfs_open_context *ctx;
3281 ctx = nfs_file_open_context(sattr->ia_file);
3288 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3290 return PTR_ERR(label);
3292 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
3294 nfs_setattr_update_inode(inode, sattr, fattr);
3295 nfs_setsecurity(inode, fattr, label);
3297 nfs4_label_free(label);
3301 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3302 const struct qstr *name, struct nfs_fh *fhandle,
3303 struct nfs_fattr *fattr, struct nfs4_label *label)
3305 struct nfs_server *server = NFS_SERVER(dir);
3307 struct nfs4_lookup_arg args = {
3308 .bitmask = server->attr_bitmask,
3309 .dir_fh = NFS_FH(dir),
3312 struct nfs4_lookup_res res = {
3318 struct rpc_message msg = {
3319 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3324 args.bitmask = nfs4_bitmask(server, label);
3326 nfs_fattr_init(fattr);
3328 dprintk("NFS call lookup %s\n", name->name);
3329 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
3330 dprintk("NFS reply lookup: %d\n", status);
3334 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
3336 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
3337 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
3338 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3342 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3343 struct qstr *name, struct nfs_fh *fhandle,
3344 struct nfs_fattr *fattr, struct nfs4_label *label)
3346 struct nfs4_exception exception = { };
3347 struct rpc_clnt *client = *clnt;
3350 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
3351 trace_nfs4_lookup(dir, name, err);
3353 case -NFS4ERR_BADNAME:
3356 case -NFS4ERR_MOVED:
3357 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
3359 case -NFS4ERR_WRONGSEC:
3361 if (client != *clnt)
3363 client = nfs4_negotiate_security(client, dir, name);
3365 return PTR_ERR(client);
3367 exception.retry = 1;
3370 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3372 } while (exception.retry);
3377 else if (client != *clnt)
3378 rpc_shutdown_client(client);
3383 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
3384 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3385 struct nfs4_label *label)
3388 struct rpc_clnt *client = NFS_CLIENT(dir);
3390 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
3391 if (client != NFS_CLIENT(dir)) {
3392 rpc_shutdown_client(client);
3393 nfs_fixup_secinfo_attributes(fattr);
3399 nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3400 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3402 struct rpc_clnt *client = NFS_CLIENT(dir);
3405 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
3407 return ERR_PTR(status);
3408 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
3411 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3413 struct nfs_server *server = NFS_SERVER(inode);
3414 struct nfs4_accessargs args = {
3415 .fh = NFS_FH(inode),
3416 .bitmask = server->cache_consistency_bitmask,
3418 struct nfs4_accessres res = {
3421 struct rpc_message msg = {
3422 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3425 .rpc_cred = entry->cred,
3427 int mode = entry->mask;
3431 * Determine which access bits we want to ask for...
3433 if (mode & MAY_READ)
3434 args.access |= NFS4_ACCESS_READ;
3435 if (S_ISDIR(inode->i_mode)) {
3436 if (mode & MAY_WRITE)
3437 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3438 if (mode & MAY_EXEC)
3439 args.access |= NFS4_ACCESS_LOOKUP;
3441 if (mode & MAY_WRITE)
3442 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3443 if (mode & MAY_EXEC)
3444 args.access |= NFS4_ACCESS_EXECUTE;
3447 res.fattr = nfs_alloc_fattr();
3448 if (res.fattr == NULL)
3451 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3453 nfs_access_set_mask(entry, res.access);
3454 nfs_refresh_inode(inode, res.fattr);
3456 nfs_free_fattr(res.fattr);
3460 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3462 struct nfs4_exception exception = { };
3465 err = _nfs4_proc_access(inode, entry);
3466 trace_nfs4_access(inode, err);
3467 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3469 } while (exception.retry);
3474 * TODO: For the time being, we don't try to get any attributes
3475 * along with any of the zero-copy operations READ, READDIR,
3478 * In the case of the first three, we want to put the GETATTR
3479 * after the read-type operation -- this is because it is hard
3480 * to predict the length of a GETATTR response in v4, and thus
3481 * align the READ data correctly. This means that the GETATTR
3482 * may end up partially falling into the page cache, and we should
3483 * shift it into the 'tail' of the xdr_buf before processing.
3484 * To do this efficiently, we need to know the total length
3485 * of data received, which doesn't seem to be available outside
3488 * In the case of WRITE, we also want to put the GETATTR after
3489 * the operation -- in this case because we want to make sure
3490 * we get the post-operation mtime and size.
3492 * Both of these changes to the XDR layer would in fact be quite
3493 * minor, but I decided to leave them for a subsequent patch.
3495 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3496 unsigned int pgbase, unsigned int pglen)
3498 struct nfs4_readlink args = {
3499 .fh = NFS_FH(inode),
3504 struct nfs4_readlink_res res;
3505 struct rpc_message msg = {
3506 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3511 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
3514 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3515 unsigned int pgbase, unsigned int pglen)
3517 struct nfs4_exception exception = { };
3520 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3521 trace_nfs4_readlink(inode, err);
3522 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3524 } while (exception.retry);
3529 * This is just for mknod. open(O_CREAT) will always do ->open_context().
3532 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
3535 struct nfs4_label l, *ilabel = NULL;
3536 struct nfs_open_context *ctx;
3537 struct nfs4_state *state;
3541 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3543 return PTR_ERR(ctx);
3545 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3547 sattr->ia_mode &= ~current_umask();
3548 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
3549 if (IS_ERR(state)) {
3550 status = PTR_ERR(state);
3554 nfs4_label_release_security(ilabel);
3555 put_nfs_open_context(ctx);
3559 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3561 struct nfs_server *server = NFS_SERVER(dir);
3562 struct nfs_removeargs args = {
3566 struct nfs_removeres res = {
3569 struct rpc_message msg = {
3570 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3576 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
3578 update_changeattr(dir, &res.cinfo);
3582 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3584 struct nfs4_exception exception = { };
3587 err = _nfs4_proc_remove(dir, name);
3588 trace_nfs4_remove(dir, name, err);
3589 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3591 } while (exception.retry);
3595 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
3597 struct nfs_server *server = NFS_SERVER(dir);
3598 struct nfs_removeargs *args = msg->rpc_argp;
3599 struct nfs_removeres *res = msg->rpc_resp;
3601 res->server = server;
3602 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
3603 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
3605 nfs_fattr_init(res->dir_attr);
3608 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3610 nfs4_setup_sequence(NFS_SERVER(data->dir),
3611 &data->args.seq_args,
3616 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
3618 struct nfs_unlinkdata *data = task->tk_calldata;
3619 struct nfs_removeres *res = &data->res;
3621 if (!nfs4_sequence_done(task, &res->seq_res))
3623 if (nfs4_async_handle_error(task, res->server, NULL,
3624 &data->timeout) == -EAGAIN)
3626 update_changeattr(dir, &res->cinfo);
3630 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3632 struct nfs_server *server = NFS_SERVER(dir);
3633 struct nfs_renameargs *arg = msg->rpc_argp;
3634 struct nfs_renameres *res = msg->rpc_resp;
3636 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
3637 res->server = server;
3638 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
3641 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3643 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3644 &data->args.seq_args,
3649 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3650 struct inode *new_dir)
3652 struct nfs_renamedata *data = task->tk_calldata;
3653 struct nfs_renameres *res = &data->res;
3655 if (!nfs4_sequence_done(task, &res->seq_res))
3657 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
3660 update_changeattr(old_dir, &res->old_cinfo);
3661 update_changeattr(new_dir, &res->new_cinfo);
3665 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3667 struct nfs_server *server = NFS_SERVER(inode);
3668 struct nfs4_link_arg arg = {
3669 .fh = NFS_FH(inode),
3670 .dir_fh = NFS_FH(dir),
3672 .bitmask = server->attr_bitmask,
3674 struct nfs4_link_res res = {
3678 struct rpc_message msg = {
3679 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3683 int status = -ENOMEM;
3685 res.fattr = nfs_alloc_fattr();
3686 if (res.fattr == NULL)
3689 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3690 if (IS_ERR(res.label)) {
3691 status = PTR_ERR(res.label);
3694 arg.bitmask = nfs4_bitmask(server, res.label);
3696 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3698 update_changeattr(dir, &res.cinfo);
3699 status = nfs_post_op_update_inode(inode, res.fattr);
3701 nfs_setsecurity(inode, res.fattr, res.label);
3705 nfs4_label_free(res.label);
3708 nfs_free_fattr(res.fattr);
3712 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3714 struct nfs4_exception exception = { };
3717 err = nfs4_handle_exception(NFS_SERVER(inode),
3718 _nfs4_proc_link(inode, dir, name),
3720 } while (exception.retry);
3724 struct nfs4_createdata {
3725 struct rpc_message msg;
3726 struct nfs4_create_arg arg;
3727 struct nfs4_create_res res;
3729 struct nfs_fattr fattr;
3730 struct nfs4_label *label;
3733 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3734 struct qstr *name, struct iattr *sattr, u32 ftype)
3736 struct nfs4_createdata *data;
3738 data = kzalloc(sizeof(*data), GFP_KERNEL);
3740 struct nfs_server *server = NFS_SERVER(dir);
3742 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3743 if (IS_ERR(data->label))
3746 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3747 data->msg.rpc_argp = &data->arg;
3748 data->msg.rpc_resp = &data->res;
3749 data->arg.dir_fh = NFS_FH(dir);
3750 data->arg.server = server;
3751 data->arg.name = name;
3752 data->arg.attrs = sattr;
3753 data->arg.ftype = ftype;
3754 data->arg.bitmask = nfs4_bitmask(server, data->label);
3755 data->res.server = server;
3756 data->res.fh = &data->fh;
3757 data->res.fattr = &data->fattr;
3758 data->res.label = data->label;
3759 nfs_fattr_init(data->res.fattr);
3767 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3769 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3770 &data->arg.seq_args, &data->res.seq_res, 1);
3772 update_changeattr(dir, &data->res.dir_cinfo);
3773 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
3778 static void nfs4_free_createdata(struct nfs4_createdata *data)
3780 nfs4_label_free(data->label);
3784 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3785 struct page *page, unsigned int len, struct iattr *sattr,
3786 struct nfs4_label *label)
3788 struct nfs4_createdata *data;
3789 int status = -ENAMETOOLONG;
3791 if (len > NFS4_MAXPATHLEN)
3795 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3799 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3800 data->arg.u.symlink.pages = &page;
3801 data->arg.u.symlink.len = len;
3802 data->arg.label = label;
3804 status = nfs4_do_create(dir, dentry, data);
3806 nfs4_free_createdata(data);
3811 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3812 struct page *page, unsigned int len, struct iattr *sattr)
3814 struct nfs4_exception exception = { };
3815 struct nfs4_label l, *label = NULL;
3818 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3821 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3822 trace_nfs4_symlink(dir, &dentry->d_name, err);
3823 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3825 } while (exception.retry);
3827 nfs4_label_release_security(label);
3831 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3832 struct iattr *sattr, struct nfs4_label *label)
3834 struct nfs4_createdata *data;
3835 int status = -ENOMEM;
3837 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3841 data->arg.label = label;
3842 status = nfs4_do_create(dir, dentry, data);
3844 nfs4_free_createdata(data);
3849 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3850 struct iattr *sattr)
3852 struct nfs4_exception exception = { };
3853 struct nfs4_label l, *label = NULL;
3856 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3858 sattr->ia_mode &= ~current_umask();
3860 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3861 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3862 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3864 } while (exception.retry);
3865 nfs4_label_release_security(label);
3870 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3871 u64 cookie, struct page **pages, unsigned int count, int plus)
3873 struct inode *dir = dentry->d_inode;
3874 struct nfs4_readdir_arg args = {
3879 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3882 struct nfs4_readdir_res res;
3883 struct rpc_message msg = {
3884 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3891 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3893 (unsigned long long)cookie);
3894 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
3895 res.pgbase = args.pgbase;
3896 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3898 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
3899 status += args.pgbase;
3902 nfs_invalidate_atime(dir);
3904 dprintk("%s: returns %d\n", __func__, status);
3908 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3909 u64 cookie, struct page **pages, unsigned int count, int plus)
3911 struct nfs4_exception exception = { };
3914 err = _nfs4_proc_readdir(dentry, cred, cookie,
3915 pages, count, plus);
3916 trace_nfs4_readdir(dentry->d_inode, err);
3917 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
3919 } while (exception.retry);
3923 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3924 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
3926 struct nfs4_createdata *data;
3927 int mode = sattr->ia_mode;
3928 int status = -ENOMEM;
3930 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3935 data->arg.ftype = NF4FIFO;
3936 else if (S_ISBLK(mode)) {
3937 data->arg.ftype = NF4BLK;
3938 data->arg.u.device.specdata1 = MAJOR(rdev);
3939 data->arg.u.device.specdata2 = MINOR(rdev);
3941 else if (S_ISCHR(mode)) {
3942 data->arg.ftype = NF4CHR;
3943 data->arg.u.device.specdata1 = MAJOR(rdev);
3944 data->arg.u.device.specdata2 = MINOR(rdev);
3945 } else if (!S_ISSOCK(mode)) {
3950 data->arg.label = label;
3951 status = nfs4_do_create(dir, dentry, data);
3953 nfs4_free_createdata(data);
3958 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3959 struct iattr *sattr, dev_t rdev)
3961 struct nfs4_exception exception = { };
3962 struct nfs4_label l, *label = NULL;
3965 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3967 sattr->ia_mode &= ~current_umask();
3969 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3970 trace_nfs4_mknod(dir, &dentry->d_name, err);
3971 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3973 } while (exception.retry);
3975 nfs4_label_release_security(label);
3980 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3981 struct nfs_fsstat *fsstat)
3983 struct nfs4_statfs_arg args = {
3985 .bitmask = server->attr_bitmask,
3987 struct nfs4_statfs_res res = {
3990 struct rpc_message msg = {
3991 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3996 nfs_fattr_init(fsstat->fattr);
3997 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4000 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4002 struct nfs4_exception exception = { };
4005 err = nfs4_handle_exception(server,
4006 _nfs4_proc_statfs(server, fhandle, fsstat),
4008 } while (exception.retry);
4012 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4013 struct nfs_fsinfo *fsinfo)
4015 struct nfs4_fsinfo_arg args = {
4017 .bitmask = server->attr_bitmask,
4019 struct nfs4_fsinfo_res res = {
4022 struct rpc_message msg = {
4023 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4028 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4031 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4033 struct nfs4_exception exception = { };
4034 unsigned long now = jiffies;
4038 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
4039 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
4041 struct nfs_client *clp = server->nfs_client;
4043 spin_lock(&clp->cl_lock);
4044 clp->cl_lease_time = fsinfo->lease_time * HZ;
4045 clp->cl_last_renewal = now;
4046 spin_unlock(&clp->cl_lock);
4049 err = nfs4_handle_exception(server, err, &exception);
4050 } while (exception.retry);
4054 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4058 nfs_fattr_init(fsinfo->fattr);
4059 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
4061 /* block layout checks this! */
4062 server->pnfs_blksize = fsinfo->blksize;
4063 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
4069 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4070 struct nfs_pathconf *pathconf)
4072 struct nfs4_pathconf_arg args = {
4074 .bitmask = server->attr_bitmask,
4076 struct nfs4_pathconf_res res = {
4077 .pathconf = pathconf,
4079 struct rpc_message msg = {
4080 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4085 /* None of the pathconf attributes are mandatory to implement */
4086 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4087 memset(pathconf, 0, sizeof(*pathconf));
4091 nfs_fattr_init(pathconf->fattr);
4092 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4095 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4096 struct nfs_pathconf *pathconf)
4098 struct nfs4_exception exception = { };
4102 err = nfs4_handle_exception(server,
4103 _nfs4_proc_pathconf(server, fhandle, pathconf),
4105 } while (exception.retry);
4109 int nfs4_set_rw_stateid(nfs4_stateid *stateid,
4110 const struct nfs_open_context *ctx,
4111 const struct nfs_lock_context *l_ctx,
4114 const struct nfs_lockowner *lockowner = NULL;
4117 lockowner = &l_ctx->lockowner;
4118 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
4120 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4122 static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4123 const struct nfs_open_context *ctx,
4124 const struct nfs_lock_context *l_ctx,
4127 nfs4_stateid current_stateid;
4129 /* If the current stateid represents a lost lock, then exit */
4130 if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode) == -EIO)
4132 return nfs4_stateid_match(stateid, ¤t_stateid);
4135 static bool nfs4_error_stateid_expired(int err)
4138 case -NFS4ERR_DELEG_REVOKED:
4139 case -NFS4ERR_ADMIN_REVOKED:
4140 case -NFS4ERR_BAD_STATEID:
4141 case -NFS4ERR_STALE_STATEID:
4142 case -NFS4ERR_OLD_STATEID:
4143 case -NFS4ERR_OPENMODE:
4144 case -NFS4ERR_EXPIRED:
4150 void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
4152 nfs_invalidate_atime(hdr->inode);
4155 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
4157 struct nfs_server *server = NFS_SERVER(hdr->inode);
4159 trace_nfs4_read(hdr, task->tk_status);
4160 if (nfs4_async_handle_error(task, server,
4161 hdr->args.context->state,
4163 rpc_restart_call_prepare(task);
4167 __nfs4_read_done_cb(hdr);
4168 if (task->tk_status > 0)
4169 renew_lease(server, hdr->timestamp);
4173 static bool nfs4_read_stateid_changed(struct rpc_task *task,
4174 struct nfs_pgio_args *args)
4177 if (!nfs4_error_stateid_expired(task->tk_status) ||
4178 nfs4_stateid_is_current(&args->stateid,
4183 rpc_restart_call_prepare(task);
4187 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4190 dprintk("--> %s\n", __func__);
4192 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4194 if (nfs4_read_stateid_changed(task, &hdr->args))
4196 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4197 nfs4_read_done_cb(task, hdr);
4200 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4201 struct rpc_message *msg)
4203 hdr->timestamp = jiffies;
4204 hdr->pgio_done_cb = nfs4_read_done_cb;
4205 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
4206 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
4209 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4210 struct nfs_pgio_header *hdr)
4212 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4213 &hdr->args.seq_args,
4217 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4218 hdr->args.lock_context,
4219 hdr->rw_ops->rw_mode) == -EIO)
4221 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
4226 static int nfs4_write_done_cb(struct rpc_task *task,
4227 struct nfs_pgio_header *hdr)
4229 struct inode *inode = hdr->inode;
4231 trace_nfs4_write(hdr, task->tk_status);
4232 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4233 hdr->args.context->state,
4235 rpc_restart_call_prepare(task);
4238 if (task->tk_status >= 0) {
4239 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4240 nfs_writeback_update_inode(hdr);
4245 static bool nfs4_write_stateid_changed(struct rpc_task *task,
4246 struct nfs_pgio_args *args)
4249 if (!nfs4_error_stateid_expired(task->tk_status) ||
4250 nfs4_stateid_is_current(&args->stateid,
4255 rpc_restart_call_prepare(task);
4259 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4261 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4263 if (nfs4_write_stateid_changed(task, &hdr->args))
4265 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4266 nfs4_write_done_cb(task, hdr);
4270 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
4272 /* Don't request attributes for pNFS or O_DIRECT writes */
4273 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
4275 /* Otherwise, request attributes if and only if we don't hold
4278 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
4281 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4282 struct rpc_message *msg)
4284 struct nfs_server *server = NFS_SERVER(hdr->inode);
4286 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4287 hdr->args.bitmask = NULL;
4288 hdr->res.fattr = NULL;
4290 hdr->args.bitmask = server->cache_consistency_bitmask;
4292 if (!hdr->pgio_done_cb)
4293 hdr->pgio_done_cb = nfs4_write_done_cb;
4294 hdr->res.server = server;
4295 hdr->timestamp = jiffies;
4297 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
4298 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
4301 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
4303 nfs4_setup_sequence(NFS_SERVER(data->inode),
4304 &data->args.seq_args,
4309 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
4311 struct inode *inode = data->inode;
4313 trace_nfs4_commit(data, task->tk_status);
4314 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4315 NULL, NULL) == -EAGAIN) {
4316 rpc_restart_call_prepare(task);
4322 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
4324 if (!nfs4_sequence_done(task, &data->res.seq_res))
4326 return data->commit_done_cb(task, data);
4329 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
4331 struct nfs_server *server = NFS_SERVER(data->inode);
4333 if (data->commit_done_cb == NULL)
4334 data->commit_done_cb = nfs4_commit_done_cb;
4335 data->res.server = server;
4336 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
4337 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4340 struct nfs4_renewdata {
4341 struct nfs_client *client;
4342 unsigned long timestamp;
4346 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4347 * standalone procedure for queueing an asynchronous RENEW.
4349 static void nfs4_renew_release(void *calldata)
4351 struct nfs4_renewdata *data = calldata;
4352 struct nfs_client *clp = data->client;
4354 if (atomic_read(&clp->cl_count) > 1)
4355 nfs4_schedule_state_renewal(clp);
4356 nfs_put_client(clp);
4360 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
4362 struct nfs4_renewdata *data = calldata;
4363 struct nfs_client *clp = data->client;
4364 unsigned long timestamp = data->timestamp;
4366 trace_nfs4_renew_async(clp, task->tk_status);
4367 switch (task->tk_status) {
4370 case -NFS4ERR_LEASE_MOVED:
4371 nfs4_schedule_lease_moved_recovery(clp);
4374 /* Unless we're shutting down, schedule state recovery! */
4375 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4377 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
4378 nfs4_schedule_lease_recovery(clp);
4381 nfs4_schedule_path_down_recovery(clp);
4383 do_renew_lease(clp, timestamp);
4386 static const struct rpc_call_ops nfs4_renew_ops = {
4387 .rpc_call_done = nfs4_renew_done,
4388 .rpc_release = nfs4_renew_release,
4391 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
4393 struct rpc_message msg = {
4394 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4398 struct nfs4_renewdata *data;
4400 if (renew_flags == 0)
4402 if (!atomic_inc_not_zero(&clp->cl_count))
4404 data = kmalloc(sizeof(*data), GFP_NOFS);
4408 data->timestamp = jiffies;
4409 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
4410 &nfs4_renew_ops, data);
4413 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
4415 struct rpc_message msg = {
4416 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4420 unsigned long now = jiffies;
4423 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4426 do_renew_lease(clp, now);
4430 static inline int nfs4_server_supports_acls(struct nfs_server *server)
4432 return server->caps & NFS_CAP_ACLS;
4435 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4436 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
4439 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
4441 static int buf_to_pages_noslab(const void *buf, size_t buflen,
4442 struct page **pages, unsigned int *pgbase)
4444 struct page *newpage, **spages;
4450 len = min_t(size_t, PAGE_SIZE, buflen);
4451 newpage = alloc_page(GFP_KERNEL);
4453 if (newpage == NULL)
4455 memcpy(page_address(newpage), buf, len);
4460 } while (buflen != 0);
4466 __free_page(spages[rc-1]);
4470 struct nfs4_cached_acl {
4476 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4478 struct nfs_inode *nfsi = NFS_I(inode);
4480 spin_lock(&inode->i_lock);
4481 kfree(nfsi->nfs4_acl);
4482 nfsi->nfs4_acl = acl;
4483 spin_unlock(&inode->i_lock);
4486 static void nfs4_zap_acl_attr(struct inode *inode)
4488 nfs4_set_cached_acl(inode, NULL);
4491 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4493 struct nfs_inode *nfsi = NFS_I(inode);
4494 struct nfs4_cached_acl *acl;
4497 spin_lock(&inode->i_lock);
4498 acl = nfsi->nfs4_acl;
4501 if (buf == NULL) /* user is just asking for length */
4503 if (acl->cached == 0)
4505 ret = -ERANGE; /* see getxattr(2) man page */
4506 if (acl->len > buflen)
4508 memcpy(buf, acl->data, acl->len);
4512 spin_unlock(&inode->i_lock);
4516 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
4518 struct nfs4_cached_acl *acl;
4519 size_t buflen = sizeof(*acl) + acl_len;
4521 if (buflen <= PAGE_SIZE) {
4522 acl = kmalloc(buflen, GFP_KERNEL);
4526 _copy_from_pages(acl->data, pages, pgbase, acl_len);
4528 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4535 nfs4_set_cached_acl(inode, acl);
4539 * The getxattr API returns the required buffer length when called with a
4540 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4541 * the required buf. On a NULL buf, we send a page of data to the server
4542 * guessing that the ACL request can be serviced by a page. If so, we cache
4543 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4544 * the cache. If not so, we throw away the page, and cache the required
4545 * length. The next getxattr call will then produce another round trip to
4546 * the server, this time with the input buf of the required size.
4548 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4550 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
4551 struct nfs_getaclargs args = {
4552 .fh = NFS_FH(inode),
4556 struct nfs_getaclres res = {
4559 struct rpc_message msg = {
4560 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4564 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4565 int ret = -ENOMEM, i;
4567 /* As long as we're doing a round trip to the server anyway,
4568 * let's be prepared for a page of acl data. */
4571 if (npages > ARRAY_SIZE(pages))
4574 for (i = 0; i < npages; i++) {
4575 pages[i] = alloc_page(GFP_KERNEL);
4580 /* for decoding across pages */
4581 res.acl_scratch = alloc_page(GFP_KERNEL);
4582 if (!res.acl_scratch)
4585 args.acl_len = npages * PAGE_SIZE;
4586 args.acl_pgbase = 0;
4588 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
4589 __func__, buf, buflen, npages, args.acl_len);
4590 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4591 &msg, &args.seq_args, &res.seq_res, 0);
4595 /* Handle the case where the passed-in buffer is too short */
4596 if (res.acl_flags & NFS4_ACL_TRUNC) {
4597 /* Did the user only issue a request for the acl length? */
4603 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
4605 if (res.acl_len > buflen) {
4609 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
4614 for (i = 0; i < npages; i++)
4616 __free_page(pages[i]);
4617 if (res.acl_scratch)
4618 __free_page(res.acl_scratch);
4622 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4624 struct nfs4_exception exception = { };
4627 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4628 trace_nfs4_get_acl(inode, ret);
4631 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4632 } while (exception.retry);
4636 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4638 struct nfs_server *server = NFS_SERVER(inode);
4641 if (!nfs4_server_supports_acls(server))
4643 ret = nfs_revalidate_inode(server, inode);
4646 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4647 nfs_zap_acl_cache(inode);
4648 ret = nfs4_read_cached_acl(inode, buf, buflen);
4650 /* -ENOENT is returned if there is no ACL or if there is an ACL
4651 * but no cached acl data, just the acl length */
4653 return nfs4_get_acl_uncached(inode, buf, buflen);
4656 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4658 struct nfs_server *server = NFS_SERVER(inode);
4659 struct page *pages[NFS4ACL_MAXPAGES];
4660 struct nfs_setaclargs arg = {
4661 .fh = NFS_FH(inode),
4665 struct nfs_setaclres res;
4666 struct rpc_message msg = {
4667 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4671 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4674 if (!nfs4_server_supports_acls(server))
4676 if (npages > ARRAY_SIZE(pages))
4678 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4681 nfs4_inode_return_delegation(inode);
4682 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4685 * Free each page after tx, so the only ref left is
4686 * held by the network stack
4689 put_page(pages[i-1]);
4692 * Acl update can result in inode attribute update.
4693 * so mark the attribute cache invalid.
4695 spin_lock(&inode->i_lock);
4696 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4697 spin_unlock(&inode->i_lock);
4698 nfs_access_zap_cache(inode);
4699 nfs_zap_acl_cache(inode);
4703 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4705 struct nfs4_exception exception = { };
4708 err = __nfs4_proc_set_acl(inode, buf, buflen);
4709 trace_nfs4_set_acl(inode, err);
4710 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4712 } while (exception.retry);
4716 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
4717 static int _nfs4_get_security_label(struct inode *inode, void *buf,
4720 struct nfs_server *server = NFS_SERVER(inode);
4721 struct nfs_fattr fattr;
4722 struct nfs4_label label = {0, 0, buflen, buf};
4724 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4725 struct nfs4_getattr_arg arg = {
4726 .fh = NFS_FH(inode),
4729 struct nfs4_getattr_res res = {
4734 struct rpc_message msg = {
4735 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4741 nfs_fattr_init(&fattr);
4743 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
4746 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4748 if (buflen < label.len)
4753 static int nfs4_get_security_label(struct inode *inode, void *buf,
4756 struct nfs4_exception exception = { };
4759 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4763 err = _nfs4_get_security_label(inode, buf, buflen);
4764 trace_nfs4_get_security_label(inode, err);
4765 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4767 } while (exception.retry);
4771 static int _nfs4_do_set_security_label(struct inode *inode,
4772 struct nfs4_label *ilabel,
4773 struct nfs_fattr *fattr,
4774 struct nfs4_label *olabel)
4777 struct iattr sattr = {0};
4778 struct nfs_server *server = NFS_SERVER(inode);
4779 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4780 struct nfs_setattrargs arg = {
4781 .fh = NFS_FH(inode),
4787 struct nfs_setattrres res = {
4792 struct rpc_message msg = {
4793 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
4799 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
4801 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4803 dprintk("%s failed: %d\n", __func__, status);
4808 static int nfs4_do_set_security_label(struct inode *inode,
4809 struct nfs4_label *ilabel,
4810 struct nfs_fattr *fattr,
4811 struct nfs4_label *olabel)
4813 struct nfs4_exception exception = { };
4817 err = _nfs4_do_set_security_label(inode, ilabel,
4819 trace_nfs4_set_security_label(inode, err);
4820 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4822 } while (exception.retry);
4827 nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4829 struct nfs4_label ilabel, *olabel = NULL;
4830 struct nfs_fattr fattr;
4831 struct rpc_cred *cred;
4832 struct inode *inode = dentry->d_inode;
4835 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4838 nfs_fattr_init(&fattr);
4842 ilabel.label = (char *)buf;
4843 ilabel.len = buflen;
4845 cred = rpc_lookup_cred();
4847 return PTR_ERR(cred);
4849 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4850 if (IS_ERR(olabel)) {
4851 status = -PTR_ERR(olabel);
4855 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4857 nfs_setsecurity(inode, &fattr, olabel);
4859 nfs4_label_free(olabel);
4864 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4868 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
4869 struct nfs4_state *state, long *timeout)
4871 struct nfs_client *clp = server->nfs_client;
4873 if (task->tk_status >= 0)
4875 switch(task->tk_status) {
4876 case -NFS4ERR_DELEG_REVOKED:
4877 case -NFS4ERR_ADMIN_REVOKED:
4878 case -NFS4ERR_BAD_STATEID:
4879 case -NFS4ERR_OPENMODE:
4882 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4883 goto recovery_failed;
4884 goto wait_on_recovery;
4885 case -NFS4ERR_EXPIRED:
4886 if (state != NULL) {
4887 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4888 goto recovery_failed;
4890 case -NFS4ERR_STALE_STATEID:
4891 case -NFS4ERR_STALE_CLIENTID:
4892 nfs4_schedule_lease_recovery(clp);
4893 goto wait_on_recovery;
4894 case -NFS4ERR_MOVED:
4895 if (nfs4_schedule_migration_recovery(server) < 0)
4896 goto recovery_failed;
4897 goto wait_on_recovery;
4898 case -NFS4ERR_LEASE_MOVED:
4899 nfs4_schedule_lease_moved_recovery(clp);
4900 goto wait_on_recovery;
4901 #if defined(CONFIG_NFS_V4_1)
4902 case -NFS4ERR_BADSESSION:
4903 case -NFS4ERR_BADSLOT:
4904 case -NFS4ERR_BAD_HIGH_SLOT:
4905 case -NFS4ERR_DEADSESSION:
4906 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4907 case -NFS4ERR_SEQ_FALSE_RETRY:
4908 case -NFS4ERR_SEQ_MISORDERED:
4909 dprintk("%s ERROR %d, Reset session\n", __func__,
4911 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4912 goto wait_on_recovery;
4913 #endif /* CONFIG_NFS_V4_1 */
4914 case -NFS4ERR_DELAY:
4915 nfs_inc_server_stats(server, NFSIOS_DELAY);
4916 rpc_delay(task, nfs4_update_delay(timeout));
4918 case -NFS4ERR_GRACE:
4919 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4920 case -NFS4ERR_RETRY_UNCACHED_REP:
4921 case -NFS4ERR_OLD_STATEID:
4924 task->tk_status = nfs4_map_errors(task->tk_status);
4927 task->tk_status = -EIO;
4930 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
4931 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4932 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4933 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4934 goto recovery_failed;
4936 task->tk_status = 0;
4940 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4941 nfs4_verifier *bootverf)
4945 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4946 /* An impossible timestamp guarantees this value
4947 * will never match a generated boot time. */
4949 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
4951 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4952 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4953 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
4955 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4959 nfs4_init_nonuniform_client_string(struct nfs_client *clp,
4960 char *buf, size_t len)
4962 unsigned int result;
4964 if (clp->cl_owner_id != NULL)
4965 return strlcpy(buf, clp->cl_owner_id, len);
4968 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4970 rpc_peeraddr2str(clp->cl_rpcclient,
4972 rpc_peeraddr2str(clp->cl_rpcclient,
4973 RPC_DISPLAY_PROTO));
4975 clp->cl_owner_id = kstrdup(buf, GFP_KERNEL);
4980 nfs4_init_uniform_client_string(struct nfs_client *clp,
4981 char *buf, size_t len)
4983 const char *nodename = clp->cl_rpcclient->cl_nodename;
4984 unsigned int result;
4986 if (clp->cl_owner_id != NULL)
4987 return strlcpy(buf, clp->cl_owner_id, len);
4989 if (nfs4_client_id_uniquifier[0] != '\0')
4990 result = scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4991 clp->rpc_ops->version,
4992 clp->cl_minorversion,
4993 nfs4_client_id_uniquifier,
4996 result = scnprintf(buf, len, "Linux NFSv%u.%u %s",
4997 clp->rpc_ops->version, clp->cl_minorversion,
4999 clp->cl_owner_id = kstrdup(buf, GFP_KERNEL);
5004 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5005 * services. Advertise one based on the address family of the
5009 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5011 if (strchr(clp->cl_ipaddr, ':') != NULL)
5012 return scnprintf(buf, len, "tcp6");
5014 return scnprintf(buf, len, "tcp");
5017 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5019 struct nfs4_setclientid *sc = calldata;
5021 if (task->tk_status == 0)
5022 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5025 static const struct rpc_call_ops nfs4_setclientid_ops = {
5026 .rpc_call_done = nfs4_setclientid_done,
5030 * nfs4_proc_setclientid - Negotiate client ID
5031 * @clp: state data structure
5032 * @program: RPC program for NFSv4 callback service
5033 * @port: IP port number for NFS4 callback service
5034 * @cred: RPC credential to use for this call
5035 * @res: where to place the result
5037 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5039 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5040 unsigned short port, struct rpc_cred *cred,
5041 struct nfs4_setclientid_res *res)
5043 nfs4_verifier sc_verifier;
5044 struct nfs4_setclientid setclientid = {
5045 .sc_verifier = &sc_verifier,
5047 .sc_cb_ident = clp->cl_cb_ident,
5049 struct rpc_message msg = {
5050 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5051 .rpc_argp = &setclientid,
5055 struct rpc_task *task;
5056 struct rpc_task_setup task_setup_data = {
5057 .rpc_client = clp->cl_rpcclient,
5058 .rpc_message = &msg,
5059 .callback_ops = &nfs4_setclientid_ops,
5060 .callback_data = &setclientid,
5061 .flags = RPC_TASK_TIMEOUT,
5065 /* nfs_client_id4 */
5066 nfs4_init_boot_verifier(clp, &sc_verifier);
5067 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5068 setclientid.sc_name_len =
5069 nfs4_init_uniform_client_string(clp,
5070 setclientid.sc_name,
5071 sizeof(setclientid.sc_name));
5073 setclientid.sc_name_len =
5074 nfs4_init_nonuniform_client_string(clp,
5075 setclientid.sc_name,
5076 sizeof(setclientid.sc_name));
5078 setclientid.sc_netid_len =
5079 nfs4_init_callback_netid(clp,
5080 setclientid.sc_netid,
5081 sizeof(setclientid.sc_netid));
5082 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
5083 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
5084 clp->cl_ipaddr, port >> 8, port & 255);
5086 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
5087 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5088 setclientid.sc_name_len, setclientid.sc_name);
5089 task = rpc_run_task(&task_setup_data);
5091 status = PTR_ERR(task);
5094 status = task->tk_status;
5095 if (setclientid.sc_cred) {
5096 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5097 put_rpccred(setclientid.sc_cred);
5101 trace_nfs4_setclientid(clp, status);
5102 dprintk("NFS reply setclientid: %d\n", status);
5107 * nfs4_proc_setclientid_confirm - Confirm client ID
5108 * @clp: state data structure
5109 * @res: result of a previous SETCLIENTID
5110 * @cred: RPC credential to use for this call
5112 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5114 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
5115 struct nfs4_setclientid_res *arg,
5116 struct rpc_cred *cred)
5118 struct rpc_message msg = {
5119 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
5125 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5126 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5128 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5129 trace_nfs4_setclientid_confirm(clp, status);
5130 dprintk("NFS reply setclientid_confirm: %d\n", status);
5134 struct nfs4_delegreturndata {
5135 struct nfs4_delegreturnargs args;
5136 struct nfs4_delegreturnres res;
5138 nfs4_stateid stateid;
5139 unsigned long timestamp;
5140 struct nfs_fattr fattr;
5142 struct inode *inode;
5147 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5149 struct nfs4_delegreturndata *data = calldata;
5151 if (!nfs4_sequence_done(task, &data->res.seq_res))
5154 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
5155 switch (task->tk_status) {
5157 renew_lease(data->res.server, data->timestamp);
5158 case -NFS4ERR_ADMIN_REVOKED:
5159 case -NFS4ERR_DELEG_REVOKED:
5160 case -NFS4ERR_BAD_STATEID:
5161 case -NFS4ERR_OLD_STATEID:
5162 case -NFS4ERR_STALE_STATEID:
5163 case -NFS4ERR_EXPIRED:
5164 task->tk_status = 0;
5166 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
5169 if (nfs4_async_handle_error(task, data->res.server,
5170 NULL, NULL) == -EAGAIN) {
5171 rpc_restart_call_prepare(task);
5175 data->rpc_status = task->tk_status;
5178 static void nfs4_delegreturn_release(void *calldata)
5180 struct nfs4_delegreturndata *data = calldata;
5181 struct inode *inode = data->inode;
5185 pnfs_roc_release(inode);
5186 nfs_iput_and_deactive(inode);
5191 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5193 struct nfs4_delegreturndata *d_data;
5195 d_data = (struct nfs4_delegreturndata *)data;
5198 pnfs_roc_drain(d_data->inode, &d_data->roc_barrier, task))
5201 nfs4_setup_sequence(d_data->res.server,
5202 &d_data->args.seq_args,
5203 &d_data->res.seq_res,
5207 static const struct rpc_call_ops nfs4_delegreturn_ops = {
5208 .rpc_call_prepare = nfs4_delegreturn_prepare,
5209 .rpc_call_done = nfs4_delegreturn_done,
5210 .rpc_release = nfs4_delegreturn_release,
5213 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5215 struct nfs4_delegreturndata *data;
5216 struct nfs_server *server = NFS_SERVER(inode);
5217 struct rpc_task *task;
5218 struct rpc_message msg = {
5219 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5222 struct rpc_task_setup task_setup_data = {
5223 .rpc_client = server->client,
5224 .rpc_message = &msg,
5225 .callback_ops = &nfs4_delegreturn_ops,
5226 .flags = RPC_TASK_ASYNC,
5230 data = kzalloc(sizeof(*data), GFP_NOFS);
5233 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
5234 data->args.fhandle = &data->fh;
5235 data->args.stateid = &data->stateid;
5236 data->args.bitmask = server->cache_consistency_bitmask;
5237 nfs_copy_fh(&data->fh, NFS_FH(inode));
5238 nfs4_stateid_copy(&data->stateid, stateid);
5239 data->res.fattr = &data->fattr;
5240 data->res.server = server;
5241 nfs_fattr_init(data->res.fattr);
5242 data->timestamp = jiffies;
5243 data->rpc_status = 0;
5244 data->inode = nfs_igrab_and_active(inode);
5246 data->roc = nfs4_roc(inode);
5248 task_setup_data.callback_data = data;
5249 msg.rpc_argp = &data->args;
5250 msg.rpc_resp = &data->res;
5251 task = rpc_run_task(&task_setup_data);
5253 return PTR_ERR(task);
5256 status = nfs4_wait_for_completion_rpc_task(task);
5259 status = data->rpc_status;
5261 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5263 nfs_refresh_inode(inode, &data->fattr);
5269 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5271 struct nfs_server *server = NFS_SERVER(inode);
5272 struct nfs4_exception exception = { };
5275 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
5276 trace_nfs4_delegreturn(inode, err);
5278 case -NFS4ERR_STALE_STATEID:
5279 case -NFS4ERR_EXPIRED:
5283 err = nfs4_handle_exception(server, err, &exception);
5284 } while (exception.retry);
5288 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5289 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5292 * sleep, with exponential backoff, and retry the LOCK operation.
5294 static unsigned long
5295 nfs4_set_lock_task_retry(unsigned long timeout)
5297 freezable_schedule_timeout_killable_unsafe(timeout);
5299 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5300 return NFS4_LOCK_MAXTIMEOUT;
5304 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5306 struct inode *inode = state->inode;
5307 struct nfs_server *server = NFS_SERVER(inode);
5308 struct nfs_client *clp = server->nfs_client;
5309 struct nfs_lockt_args arg = {
5310 .fh = NFS_FH(inode),
5313 struct nfs_lockt_res res = {
5316 struct rpc_message msg = {
5317 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5320 .rpc_cred = state->owner->so_cred,
5322 struct nfs4_lock_state *lsp;
5325 arg.lock_owner.clientid = clp->cl_clientid;
5326 status = nfs4_set_lock_state(state, request);
5329 lsp = request->fl_u.nfs4_fl.owner;
5330 arg.lock_owner.id = lsp->ls_seqid.owner_id;
5331 arg.lock_owner.s_dev = server->s_dev;
5332 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5335 request->fl_type = F_UNLCK;
5337 case -NFS4ERR_DENIED:
5340 request->fl_ops->fl_release_private(request);
5341 request->fl_ops = NULL;
5346 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5348 struct nfs4_exception exception = { };
5352 err = _nfs4_proc_getlk(state, cmd, request);
5353 trace_nfs4_get_lock(request, state, cmd, err);
5354 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
5356 } while (exception.retry);
5360 static int do_vfs_lock(struct file *file, struct file_lock *fl)
5363 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5365 res = posix_lock_file_wait(file, fl);
5368 res = flock_lock_file_wait(file, fl);
5376 struct nfs4_unlockdata {
5377 struct nfs_locku_args arg;
5378 struct nfs_locku_res res;
5379 struct nfs4_lock_state *lsp;
5380 struct nfs_open_context *ctx;
5381 struct file_lock fl;
5382 const struct nfs_server *server;
5383 unsigned long timestamp;
5386 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5387 struct nfs_open_context *ctx,
5388 struct nfs4_lock_state *lsp,
5389 struct nfs_seqid *seqid)
5391 struct nfs4_unlockdata *p;
5392 struct inode *inode = lsp->ls_state->inode;
5394 p = kzalloc(sizeof(*p), GFP_NOFS);
5397 p->arg.fh = NFS_FH(inode);
5399 p->arg.seqid = seqid;
5400 p->res.seqid = seqid;
5402 atomic_inc(&lsp->ls_count);
5403 /* Ensure we don't close file until we're done freeing locks! */
5404 p->ctx = get_nfs_open_context(ctx);
5405 memcpy(&p->fl, fl, sizeof(p->fl));
5406 p->server = NFS_SERVER(inode);
5410 static void nfs4_locku_release_calldata(void *data)
5412 struct nfs4_unlockdata *calldata = data;
5413 nfs_free_seqid(calldata->arg.seqid);
5414 nfs4_put_lock_state(calldata->lsp);
5415 put_nfs_open_context(calldata->ctx);
5419 static void nfs4_locku_done(struct rpc_task *task, void *data)
5421 struct nfs4_unlockdata *calldata = data;
5423 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5425 switch (task->tk_status) {
5427 renew_lease(calldata->server, calldata->timestamp);
5428 do_vfs_lock(calldata->fl.fl_file, &calldata->fl);
5429 if (nfs4_update_lock_stateid(calldata->lsp,
5430 &calldata->res.stateid))
5432 case -NFS4ERR_BAD_STATEID:
5433 case -NFS4ERR_OLD_STATEID:
5434 case -NFS4ERR_STALE_STATEID:
5435 case -NFS4ERR_EXPIRED:
5436 if (!nfs4_stateid_match(&calldata->arg.stateid,
5437 &calldata->lsp->ls_stateid))
5438 rpc_restart_call_prepare(task);
5441 if (nfs4_async_handle_error(task, calldata->server,
5442 NULL, NULL) == -EAGAIN)
5443 rpc_restart_call_prepare(task);
5445 nfs_release_seqid(calldata->arg.seqid);
5448 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
5450 struct nfs4_unlockdata *calldata = data;
5452 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
5454 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
5455 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
5456 /* Note: exit _without_ running nfs4_locku_done */
5459 calldata->timestamp = jiffies;
5460 if (nfs4_setup_sequence(calldata->server,
5461 &calldata->arg.seq_args,
5462 &calldata->res.seq_res,
5464 nfs_release_seqid(calldata->arg.seqid);
5467 task->tk_action = NULL;
5469 nfs4_sequence_done(task, &calldata->res.seq_res);
5472 static const struct rpc_call_ops nfs4_locku_ops = {
5473 .rpc_call_prepare = nfs4_locku_prepare,
5474 .rpc_call_done = nfs4_locku_done,
5475 .rpc_release = nfs4_locku_release_calldata,
5478 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5479 struct nfs_open_context *ctx,
5480 struct nfs4_lock_state *lsp,
5481 struct nfs_seqid *seqid)
5483 struct nfs4_unlockdata *data;
5484 struct rpc_message msg = {
5485 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5486 .rpc_cred = ctx->cred,
5488 struct rpc_task_setup task_setup_data = {
5489 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5490 .rpc_message = &msg,
5491 .callback_ops = &nfs4_locku_ops,
5492 .workqueue = nfsiod_workqueue,
5493 .flags = RPC_TASK_ASYNC,
5496 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5497 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5499 /* Ensure this is an unlock - when canceling a lock, the
5500 * canceled lock is passed in, and it won't be an unlock.
5502 fl->fl_type = F_UNLCK;
5504 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5506 nfs_free_seqid(seqid);
5507 return ERR_PTR(-ENOMEM);
5510 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5511 msg.rpc_argp = &data->arg;
5512 msg.rpc_resp = &data->res;
5513 task_setup_data.callback_data = data;
5514 return rpc_run_task(&task_setup_data);
5517 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5519 struct inode *inode = state->inode;
5520 struct nfs4_state_owner *sp = state->owner;
5521 struct nfs_inode *nfsi = NFS_I(inode);
5522 struct nfs_seqid *seqid;
5523 struct nfs4_lock_state *lsp;
5524 struct rpc_task *task;
5525 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
5527 unsigned char fl_flags = request->fl_flags;
5529 status = nfs4_set_lock_state(state, request);
5530 /* Unlock _before_ we do the RPC call */
5531 request->fl_flags |= FL_EXISTS;
5532 /* Exclude nfs_delegation_claim_locks() */
5533 mutex_lock(&sp->so_delegreturn_mutex);
5534 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
5535 down_read(&nfsi->rwsem);
5536 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5537 up_read(&nfsi->rwsem);
5538 mutex_unlock(&sp->so_delegreturn_mutex);
5541 up_read(&nfsi->rwsem);
5542 mutex_unlock(&sp->so_delegreturn_mutex);
5545 /* Is this a delegated lock? */
5546 lsp = request->fl_u.nfs4_fl.owner;
5547 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5549 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5550 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
5554 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
5555 status = PTR_ERR(task);
5558 status = nfs4_wait_for_completion_rpc_task(task);
5561 request->fl_flags = fl_flags;
5562 trace_nfs4_unlock(request, state, F_SETLK, status);
5566 struct nfs4_lockdata {
5567 struct nfs_lock_args arg;
5568 struct nfs_lock_res res;
5569 struct nfs4_lock_state *lsp;
5570 struct nfs_open_context *ctx;
5571 struct file_lock fl;
5572 unsigned long timestamp;
5575 struct nfs_server *server;
5578 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
5579 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5582 struct nfs4_lockdata *p;
5583 struct inode *inode = lsp->ls_state->inode;
5584 struct nfs_server *server = NFS_SERVER(inode);
5585 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
5587 p = kzalloc(sizeof(*p), gfp_mask);
5591 p->arg.fh = NFS_FH(inode);
5593 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
5594 if (IS_ERR(p->arg.open_seqid))
5596 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5597 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
5598 if (IS_ERR(p->arg.lock_seqid))
5599 goto out_free_seqid;
5600 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
5601 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
5602 p->arg.lock_owner.s_dev = server->s_dev;
5603 p->res.lock_seqid = p->arg.lock_seqid;
5606 atomic_inc(&lsp->ls_count);
5607 p->ctx = get_nfs_open_context(ctx);
5608 memcpy(&p->fl, fl, sizeof(p->fl));
5611 nfs_free_seqid(p->arg.open_seqid);
5617 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5619 struct nfs4_lockdata *data = calldata;
5620 struct nfs4_state *state = data->lsp->ls_state;
5622 dprintk("%s: begin!\n", __func__);
5623 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
5625 /* Do we need to do an open_to_lock_owner? */
5626 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
5627 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
5628 goto out_release_lock_seqid;
5630 nfs4_stateid_copy(&data->arg.open_stateid,
5631 &state->open_stateid);
5632 data->arg.new_lock_owner = 1;
5633 data->res.open_seqid = data->arg.open_seqid;
5635 data->arg.new_lock_owner = 0;
5636 nfs4_stateid_copy(&data->arg.lock_stateid,
5637 &data->lsp->ls_stateid);
5639 if (!nfs4_valid_open_stateid(state)) {
5640 data->rpc_status = -EBADF;
5641 task->tk_action = NULL;
5642 goto out_release_open_seqid;
5644 data->timestamp = jiffies;
5645 if (nfs4_setup_sequence(data->server,
5646 &data->arg.seq_args,
5650 out_release_open_seqid:
5651 nfs_release_seqid(data->arg.open_seqid);
5652 out_release_lock_seqid:
5653 nfs_release_seqid(data->arg.lock_seqid);
5655 nfs4_sequence_done(task, &data->res.seq_res);
5656 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
5659 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5661 struct nfs4_lockdata *data = calldata;
5662 struct nfs4_lock_state *lsp = data->lsp;
5664 dprintk("%s: begin!\n", __func__);
5666 if (!nfs4_sequence_done(task, &data->res.seq_res))
5669 data->rpc_status = task->tk_status;
5670 switch (task->tk_status) {
5672 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode),
5674 if (data->arg.new_lock) {
5675 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
5676 if (do_vfs_lock(data->fl.fl_file, &data->fl) < 0) {
5677 rpc_restart_call_prepare(task);
5681 if (data->arg.new_lock_owner != 0) {
5682 nfs_confirm_seqid(&lsp->ls_seqid, 0);
5683 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
5684 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5685 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
5686 rpc_restart_call_prepare(task);
5688 case -NFS4ERR_BAD_STATEID:
5689 case -NFS4ERR_OLD_STATEID:
5690 case -NFS4ERR_STALE_STATEID:
5691 case -NFS4ERR_EXPIRED:
5692 if (data->arg.new_lock_owner != 0) {
5693 if (!nfs4_stateid_match(&data->arg.open_stateid,
5694 &lsp->ls_state->open_stateid))
5695 rpc_restart_call_prepare(task);
5696 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
5698 rpc_restart_call_prepare(task);
5700 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
5703 static void nfs4_lock_release(void *calldata)
5705 struct nfs4_lockdata *data = calldata;
5707 dprintk("%s: begin!\n", __func__);
5708 nfs_free_seqid(data->arg.open_seqid);
5709 if (data->cancelled != 0) {
5710 struct rpc_task *task;
5711 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5712 data->arg.lock_seqid);
5714 rpc_put_task_async(task);
5715 dprintk("%s: cancelling lock!\n", __func__);
5717 nfs_free_seqid(data->arg.lock_seqid);
5718 nfs4_put_lock_state(data->lsp);
5719 put_nfs_open_context(data->ctx);
5721 dprintk("%s: done!\n", __func__);
5724 static const struct rpc_call_ops nfs4_lock_ops = {
5725 .rpc_call_prepare = nfs4_lock_prepare,
5726 .rpc_call_done = nfs4_lock_done,
5727 .rpc_release = nfs4_lock_release,
5730 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5733 case -NFS4ERR_ADMIN_REVOKED:
5734 case -NFS4ERR_BAD_STATEID:
5735 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
5736 if (new_lock_owner != 0 ||
5737 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
5738 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
5740 case -NFS4ERR_STALE_STATEID:
5741 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
5742 case -NFS4ERR_EXPIRED:
5743 nfs4_schedule_lease_recovery(server->nfs_client);
5747 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
5749 struct nfs4_lockdata *data;
5750 struct rpc_task *task;
5751 struct rpc_message msg = {
5752 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5753 .rpc_cred = state->owner->so_cred,
5755 struct rpc_task_setup task_setup_data = {
5756 .rpc_client = NFS_CLIENT(state->inode),
5757 .rpc_message = &msg,
5758 .callback_ops = &nfs4_lock_ops,
5759 .workqueue = nfsiod_workqueue,
5760 .flags = RPC_TASK_ASYNC,
5764 dprintk("%s: begin!\n", __func__);
5765 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
5766 fl->fl_u.nfs4_fl.owner,
5767 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
5771 data->arg.block = 1;
5772 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5773 msg.rpc_argp = &data->arg;
5774 msg.rpc_resp = &data->res;
5775 task_setup_data.callback_data = data;
5776 if (recovery_type > NFS_LOCK_NEW) {
5777 if (recovery_type == NFS_LOCK_RECLAIM)
5778 data->arg.reclaim = NFS_LOCK_RECLAIM;
5779 nfs4_set_sequence_privileged(&data->arg.seq_args);
5781 data->arg.new_lock = 1;
5782 task = rpc_run_task(&task_setup_data);
5784 return PTR_ERR(task);
5785 ret = nfs4_wait_for_completion_rpc_task(task);
5787 ret = data->rpc_status;
5789 nfs4_handle_setlk_error(data->server, data->lsp,
5790 data->arg.new_lock_owner, ret);
5792 data->cancelled = 1;
5794 dprintk("%s: done, ret = %d!\n", __func__, ret);
5798 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5800 struct nfs_server *server = NFS_SERVER(state->inode);
5801 struct nfs4_exception exception = {
5802 .inode = state->inode,
5807 /* Cache the lock if possible... */
5808 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5810 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
5811 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
5812 if (err != -NFS4ERR_DELAY)
5814 nfs4_handle_exception(server, err, &exception);
5815 } while (exception.retry);
5819 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5821 struct nfs_server *server = NFS_SERVER(state->inode);
5822 struct nfs4_exception exception = {
5823 .inode = state->inode,
5827 err = nfs4_set_lock_state(state, request);
5830 if (!recover_lost_locks) {
5831 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5835 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5837 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
5838 trace_nfs4_lock_expired(request, state, F_SETLK, err);
5842 case -NFS4ERR_GRACE:
5843 case -NFS4ERR_DELAY:
5844 nfs4_handle_exception(server, err, &exception);
5847 } while (exception.retry);
5852 #if defined(CONFIG_NFS_V4_1)
5854 * nfs41_check_expired_locks - possibly free a lock stateid
5856 * @state: NFSv4 state for an inode
5858 * Returns NFS_OK if recovery for this stateid is now finished.
5859 * Otherwise a negative NFS4ERR value is returned.
5861 static int nfs41_check_expired_locks(struct nfs4_state *state)
5863 int status, ret = -NFS4ERR_BAD_STATEID;
5864 struct nfs4_lock_state *lsp;
5865 struct nfs_server *server = NFS_SERVER(state->inode);
5867 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
5868 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
5869 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5871 status = nfs41_test_stateid(server,
5874 trace_nfs4_test_lock_stateid(state, lsp, status);
5875 if (status != NFS_OK) {
5876 /* Free the stateid unless the server
5877 * informs us the stateid is unrecognized. */
5878 if (status != -NFS4ERR_BAD_STATEID)
5879 nfs41_free_stateid(server,
5882 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5891 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5893 int status = NFS_OK;
5895 if (test_bit(LK_STATE_IN_USE, &state->flags))
5896 status = nfs41_check_expired_locks(state);
5897 if (status != NFS_OK)
5898 status = nfs4_lock_expired(state, request);
5903 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5905 struct nfs_inode *nfsi = NFS_I(state->inode);
5906 unsigned char fl_flags = request->fl_flags;
5907 int status = -ENOLCK;
5909 if ((fl_flags & FL_POSIX) &&
5910 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5912 /* Is this a delegated open? */
5913 status = nfs4_set_lock_state(state, request);
5916 request->fl_flags |= FL_ACCESS;
5917 status = do_vfs_lock(request->fl_file, request);
5920 down_read(&nfsi->rwsem);
5921 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
5922 /* Yes: cache locks! */
5923 /* ...but avoid races with delegation recall... */
5924 request->fl_flags = fl_flags & ~FL_SLEEP;
5925 status = do_vfs_lock(request->fl_file, request);
5926 up_read(&nfsi->rwsem);
5929 up_read(&nfsi->rwsem);
5930 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
5932 request->fl_flags = fl_flags;
5936 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5938 struct nfs4_exception exception = {
5940 .inode = state->inode,
5945 err = _nfs4_proc_setlk(state, cmd, request);
5946 trace_nfs4_set_lock(request, state, cmd, err);
5947 if (err == -NFS4ERR_DENIED)
5949 err = nfs4_handle_exception(NFS_SERVER(state->inode),
5951 } while (exception.retry);
5956 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5958 struct nfs_open_context *ctx;
5959 struct nfs4_state *state;
5960 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5963 /* verify open state */
5964 ctx = nfs_file_open_context(filp);
5967 if (request->fl_start < 0 || request->fl_end < 0)
5970 if (IS_GETLK(cmd)) {
5972 return nfs4_proc_getlk(state, F_GETLK, request);
5976 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5979 if (request->fl_type == F_UNLCK) {
5981 return nfs4_proc_unlck(state, cmd, request);
5988 * Don't rely on the VFS having checked the file open mode,
5989 * since it won't do this for flock() locks.
5991 switch (request->fl_type) {
5993 if (!(filp->f_mode & FMODE_READ))
5997 if (!(filp->f_mode & FMODE_WRITE))
6002 status = nfs4_proc_setlk(state, cmd, request);
6003 if ((status != -EAGAIN) || IS_SETLK(cmd))
6005 timeout = nfs4_set_lock_task_retry(timeout);
6006 status = -ERESTARTSYS;
6009 } while(status < 0);
6013 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
6015 struct nfs_server *server = NFS_SERVER(state->inode);
6018 err = nfs4_set_lock_state(state, fl);
6021 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
6022 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
6025 struct nfs_release_lockowner_data {
6026 struct nfs4_lock_state *lsp;
6027 struct nfs_server *server;
6028 struct nfs_release_lockowner_args args;
6029 struct nfs_release_lockowner_res res;
6030 unsigned long timestamp;
6033 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6035 struct nfs_release_lockowner_data *data = calldata;
6036 struct nfs_server *server = data->server;
6037 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6038 &data->args.seq_args, &data->res.seq_res, task);
6039 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6040 data->timestamp = jiffies;
6043 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6045 struct nfs_release_lockowner_data *data = calldata;
6046 struct nfs_server *server = data->server;
6048 nfs40_sequence_done(task, &data->res.seq_res);
6050 switch (task->tk_status) {
6052 renew_lease(server, data->timestamp);
6054 case -NFS4ERR_STALE_CLIENTID:
6055 case -NFS4ERR_EXPIRED:
6056 nfs4_schedule_lease_recovery(server->nfs_client);
6058 case -NFS4ERR_LEASE_MOVED:
6059 case -NFS4ERR_DELAY:
6060 if (nfs4_async_handle_error(task, server,
6061 NULL, NULL) == -EAGAIN)
6062 rpc_restart_call_prepare(task);
6066 static void nfs4_release_lockowner_release(void *calldata)
6068 struct nfs_release_lockowner_data *data = calldata;
6069 nfs4_free_lock_state(data->server, data->lsp);
6073 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
6074 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6075 .rpc_call_done = nfs4_release_lockowner_done,
6076 .rpc_release = nfs4_release_lockowner_release,
6080 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
6082 struct nfs_release_lockowner_data *data;
6083 struct rpc_message msg = {
6084 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6087 if (server->nfs_client->cl_mvops->minor_version != 0)
6090 data = kmalloc(sizeof(*data), GFP_NOFS);
6094 data->server = server;
6095 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6096 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6097 data->args.lock_owner.s_dev = server->s_dev;
6099 msg.rpc_argp = &data->args;
6100 msg.rpc_resp = &data->res;
6101 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
6102 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
6105 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6107 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6108 const void *buf, size_t buflen,
6109 int flags, int type)
6111 if (strcmp(key, "") != 0)
6114 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6117 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6118 void *buf, size_t buflen, int type)
6120 if (strcmp(key, "") != 0)
6123 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6126 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6127 size_t list_len, const char *name,
6128 size_t name_len, int type)
6130 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6132 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
6135 if (list && len <= list_len)
6136 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
6140 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
6141 static inline int nfs4_server_supports_labels(struct nfs_server *server)
6143 return server->caps & NFS_CAP_SECURITY_LABEL;
6146 static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6147 const void *buf, size_t buflen,
6148 int flags, int type)
6150 if (security_ismaclabel(key))
6151 return nfs4_set_security_label(dentry, buf, buflen);
6156 static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6157 void *buf, size_t buflen, int type)
6159 if (security_ismaclabel(key))
6160 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
6164 static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6165 size_t list_len, const char *name,
6166 size_t name_len, int type)
6170 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
6171 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
6172 if (list && len <= list_len)
6173 security_inode_listsecurity(dentry->d_inode, list, len);
6178 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6179 .prefix = XATTR_SECURITY_PREFIX,
6180 .list = nfs4_xattr_list_nfs4_label,
6181 .get = nfs4_xattr_get_nfs4_label,
6182 .set = nfs4_xattr_set_nfs4_label,
6188 * nfs_fhget will use either the mounted_on_fileid or the fileid
6190 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6192 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6193 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6194 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
6195 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
6198 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
6199 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
6200 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6204 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6205 const struct qstr *name,
6206 struct nfs4_fs_locations *fs_locations,
6209 struct nfs_server *server = NFS_SERVER(dir);
6211 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6213 struct nfs4_fs_locations_arg args = {
6214 .dir_fh = NFS_FH(dir),
6219 struct nfs4_fs_locations_res res = {
6220 .fs_locations = fs_locations,
6222 struct rpc_message msg = {
6223 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6229 dprintk("%s: start\n", __func__);
6231 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6232 * is not supported */
6233 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6234 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6236 bitmask[0] |= FATTR4_WORD0_FILEID;
6238 nfs_fattr_init(&fs_locations->fattr);
6239 fs_locations->server = server;
6240 fs_locations->nlocations = 0;
6241 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
6242 dprintk("%s: returned status = %d\n", __func__, status);
6246 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6247 const struct qstr *name,
6248 struct nfs4_fs_locations *fs_locations,
6251 struct nfs4_exception exception = { };
6254 err = _nfs4_proc_fs_locations(client, dir, name,
6255 fs_locations, page);
6256 trace_nfs4_get_fs_locations(dir, name, err);
6257 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6259 } while (exception.retry);
6264 * This operation also signals the server that this client is
6265 * performing migration recovery. The server can stop returning
6266 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6267 * appended to this compound to identify the client ID which is
6268 * performing recovery.
6270 static int _nfs40_proc_get_locations(struct inode *inode,
6271 struct nfs4_fs_locations *locations,
6272 struct page *page, struct rpc_cred *cred)
6274 struct nfs_server *server = NFS_SERVER(inode);
6275 struct rpc_clnt *clnt = server->client;
6277 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6279 struct nfs4_fs_locations_arg args = {
6280 .clientid = server->nfs_client->cl_clientid,
6281 .fh = NFS_FH(inode),
6284 .migration = 1, /* skip LOOKUP */
6285 .renew = 1, /* append RENEW */
6287 struct nfs4_fs_locations_res res = {
6288 .fs_locations = locations,
6292 struct rpc_message msg = {
6293 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6298 unsigned long now = jiffies;
6301 nfs_fattr_init(&locations->fattr);
6302 locations->server = server;
6303 locations->nlocations = 0;
6305 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6306 nfs4_set_sequence_privileged(&args.seq_args);
6307 status = nfs4_call_sync_sequence(clnt, server, &msg,
6308 &args.seq_args, &res.seq_res);
6312 renew_lease(server, now);
6316 #ifdef CONFIG_NFS_V4_1
6319 * This operation also signals the server that this client is
6320 * performing migration recovery. The server can stop asserting
6321 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6322 * performing this operation is identified in the SEQUENCE
6323 * operation in this compound.
6325 * When the client supports GETATTR(fs_locations_info), it can
6326 * be plumbed in here.
6328 static int _nfs41_proc_get_locations(struct inode *inode,
6329 struct nfs4_fs_locations *locations,
6330 struct page *page, struct rpc_cred *cred)
6332 struct nfs_server *server = NFS_SERVER(inode);
6333 struct rpc_clnt *clnt = server->client;
6335 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6337 struct nfs4_fs_locations_arg args = {
6338 .fh = NFS_FH(inode),
6341 .migration = 1, /* skip LOOKUP */
6343 struct nfs4_fs_locations_res res = {
6344 .fs_locations = locations,
6347 struct rpc_message msg = {
6348 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6355 nfs_fattr_init(&locations->fattr);
6356 locations->server = server;
6357 locations->nlocations = 0;
6359 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6360 nfs4_set_sequence_privileged(&args.seq_args);
6361 status = nfs4_call_sync_sequence(clnt, server, &msg,
6362 &args.seq_args, &res.seq_res);
6363 if (status == NFS4_OK &&
6364 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6365 status = -NFS4ERR_LEASE_MOVED;
6369 #endif /* CONFIG_NFS_V4_1 */
6372 * nfs4_proc_get_locations - discover locations for a migrated FSID
6373 * @inode: inode on FSID that is migrating
6374 * @locations: result of query
6376 * @cred: credential to use for this operation
6378 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6379 * operation failed, or a negative errno if a local error occurred.
6381 * On success, "locations" is filled in, but if the server has
6382 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6385 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6386 * from this client that require migration recovery.
6388 int nfs4_proc_get_locations(struct inode *inode,
6389 struct nfs4_fs_locations *locations,
6390 struct page *page, struct rpc_cred *cred)
6392 struct nfs_server *server = NFS_SERVER(inode);
6393 struct nfs_client *clp = server->nfs_client;
6394 const struct nfs4_mig_recovery_ops *ops =
6395 clp->cl_mvops->mig_recovery_ops;
6396 struct nfs4_exception exception = { };
6399 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6400 (unsigned long long)server->fsid.major,
6401 (unsigned long long)server->fsid.minor,
6403 nfs_display_fhandle(NFS_FH(inode), __func__);
6406 status = ops->get_locations(inode, locations, page, cred);
6407 if (status != -NFS4ERR_DELAY)
6409 nfs4_handle_exception(server, status, &exception);
6410 } while (exception.retry);
6415 * This operation also signals the server that this client is
6416 * performing "lease moved" recovery. The server can stop
6417 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6418 * is appended to this compound to identify the client ID which is
6419 * performing recovery.
6421 static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6423 struct nfs_server *server = NFS_SERVER(inode);
6424 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6425 struct rpc_clnt *clnt = server->client;
6426 struct nfs4_fsid_present_arg args = {
6427 .fh = NFS_FH(inode),
6428 .clientid = clp->cl_clientid,
6429 .renew = 1, /* append RENEW */
6431 struct nfs4_fsid_present_res res = {
6434 struct rpc_message msg = {
6435 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6440 unsigned long now = jiffies;
6443 res.fh = nfs_alloc_fhandle();
6447 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6448 nfs4_set_sequence_privileged(&args.seq_args);
6449 status = nfs4_call_sync_sequence(clnt, server, &msg,
6450 &args.seq_args, &res.seq_res);
6451 nfs_free_fhandle(res.fh);
6455 do_renew_lease(clp, now);
6459 #ifdef CONFIG_NFS_V4_1
6462 * This operation also signals the server that this client is
6463 * performing "lease moved" recovery. The server can stop asserting
6464 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6465 * this operation is identified in the SEQUENCE operation in this
6468 static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6470 struct nfs_server *server = NFS_SERVER(inode);
6471 struct rpc_clnt *clnt = server->client;
6472 struct nfs4_fsid_present_arg args = {
6473 .fh = NFS_FH(inode),
6475 struct nfs4_fsid_present_res res = {
6477 struct rpc_message msg = {
6478 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6485 res.fh = nfs_alloc_fhandle();
6489 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6490 nfs4_set_sequence_privileged(&args.seq_args);
6491 status = nfs4_call_sync_sequence(clnt, server, &msg,
6492 &args.seq_args, &res.seq_res);
6493 nfs_free_fhandle(res.fh);
6494 if (status == NFS4_OK &&
6495 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6496 status = -NFS4ERR_LEASE_MOVED;
6500 #endif /* CONFIG_NFS_V4_1 */
6503 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6504 * @inode: inode on FSID to check
6505 * @cred: credential to use for this operation
6507 * Server indicates whether the FSID is present, moved, or not
6508 * recognized. This operation is necessary to clear a LEASE_MOVED
6509 * condition for this client ID.
6511 * Returns NFS4_OK if the FSID is present on this server,
6512 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6513 * NFS4ERR code if some error occurred on the server, or a
6514 * negative errno if a local failure occurred.
6516 int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6518 struct nfs_server *server = NFS_SERVER(inode);
6519 struct nfs_client *clp = server->nfs_client;
6520 const struct nfs4_mig_recovery_ops *ops =
6521 clp->cl_mvops->mig_recovery_ops;
6522 struct nfs4_exception exception = { };
6525 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6526 (unsigned long long)server->fsid.major,
6527 (unsigned long long)server->fsid.minor,
6529 nfs_display_fhandle(NFS_FH(inode), __func__);
6532 status = ops->fsid_present(inode, cred);
6533 if (status != -NFS4ERR_DELAY)
6535 nfs4_handle_exception(server, status, &exception);
6536 } while (exception.retry);
6541 * If 'use_integrity' is true and the state managment nfs_client
6542 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6543 * and the machine credential as per RFC3530bis and RFC5661 Security
6544 * Considerations sections. Otherwise, just use the user cred with the
6545 * filesystem's rpc_client.
6547 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
6550 struct nfs4_secinfo_arg args = {
6551 .dir_fh = NFS_FH(dir),
6554 struct nfs4_secinfo_res res = {
6557 struct rpc_message msg = {
6558 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6562 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
6563 struct rpc_cred *cred = NULL;
6565 if (use_integrity) {
6566 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
6567 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6568 msg.rpc_cred = cred;
6571 dprintk("NFS call secinfo %s\n", name->name);
6573 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6574 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6576 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6578 dprintk("NFS reply secinfo: %d\n", status);
6586 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6587 struct nfs4_secinfo_flavors *flavors)
6589 struct nfs4_exception exception = { };
6592 err = -NFS4ERR_WRONGSEC;
6594 /* try to use integrity protection with machine cred */
6595 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6596 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6599 * if unable to use integrity protection, or SECINFO with
6600 * integrity protection returns NFS4ERR_WRONGSEC (which is
6601 * disallowed by spec, but exists in deployed servers) use
6602 * the current filesystem's rpc_client and the user cred.
6604 if (err == -NFS4ERR_WRONGSEC)
6605 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6607 trace_nfs4_secinfo(dir, name, err);
6608 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6610 } while (exception.retry);
6614 #ifdef CONFIG_NFS_V4_1
6616 * Check the exchange flags returned by the server for invalid flags, having
6617 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6620 static int nfs4_check_cl_exchange_flags(u32 flags)
6622 if (flags & ~EXCHGID4_FLAG_MASK_R)
6624 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6625 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6627 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6631 return -NFS4ERR_INVAL;
6635 nfs41_same_server_scope(struct nfs41_server_scope *a,
6636 struct nfs41_server_scope *b)
6638 if (a->server_scope_sz == b->server_scope_sz &&
6639 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6646 * nfs4_proc_bind_conn_to_session()
6648 * The 4.1 client currently uses the same TCP connection for the
6649 * fore and backchannel.
6651 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
6654 struct nfs41_bind_conn_to_session_args args = {
6656 .dir = NFS4_CDFC4_FORE_OR_BOTH,
6658 struct nfs41_bind_conn_to_session_res res;
6659 struct rpc_message msg = {
6661 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6667 dprintk("--> %s\n", __func__);
6669 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
6670 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
6671 args.dir = NFS4_CDFC4_FORE;
6673 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6674 trace_nfs4_bind_conn_to_session(clp, status);
6676 if (memcmp(res.sessionid.data,
6677 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6678 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6682 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
6683 dprintk("NFS: %s: Unexpected direction from server\n",
6688 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
6689 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6696 dprintk("<-- %s status= %d\n", __func__, status);
6701 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6702 * and operations we'd like to see to enable certain features in the allow map
6704 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6705 .how = SP4_MACH_CRED,
6706 .enforce.u.words = {
6707 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6708 1 << (OP_EXCHANGE_ID - 32) |
6709 1 << (OP_CREATE_SESSION - 32) |
6710 1 << (OP_DESTROY_SESSION - 32) |
6711 1 << (OP_DESTROY_CLIENTID - 32)
6714 [0] = 1 << (OP_CLOSE) |
6717 [1] = 1 << (OP_SECINFO - 32) |
6718 1 << (OP_SECINFO_NO_NAME - 32) |
6719 1 << (OP_TEST_STATEID - 32) |
6720 1 << (OP_FREE_STATEID - 32) |
6721 1 << (OP_WRITE - 32)
6726 * Select the state protection mode for client `clp' given the server results
6727 * from exchange_id in `sp'.
6729 * Returns 0 on success, negative errno otherwise.
6731 static int nfs4_sp4_select_mode(struct nfs_client *clp,
6732 struct nfs41_state_protection *sp)
6734 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6735 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6736 1 << (OP_EXCHANGE_ID - 32) |
6737 1 << (OP_CREATE_SESSION - 32) |
6738 1 << (OP_DESTROY_SESSION - 32) |
6739 1 << (OP_DESTROY_CLIENTID - 32)
6743 if (sp->how == SP4_MACH_CRED) {
6744 /* Print state protect result */
6745 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6746 for (i = 0; i <= LAST_NFS4_OP; i++) {
6747 if (test_bit(i, sp->enforce.u.longs))
6748 dfprintk(MOUNT, " enforce op %d\n", i);
6749 if (test_bit(i, sp->allow.u.longs))
6750 dfprintk(MOUNT, " allow op %d\n", i);
6753 /* make sure nothing is on enforce list that isn't supported */
6754 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6755 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6756 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6762 * Minimal mode - state operations are allowed to use machine
6763 * credential. Note this already happens by default, so the
6764 * client doesn't have to do anything more than the negotiation.
6766 * NOTE: we don't care if EXCHANGE_ID is in the list -
6767 * we're already using the machine cred for exchange_id
6768 * and will never use a different cred.
6770 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6771 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6772 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6773 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6774 dfprintk(MOUNT, "sp4_mach_cred:\n");
6775 dfprintk(MOUNT, " minimal mode enabled\n");
6776 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6778 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6782 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6783 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6784 dfprintk(MOUNT, " cleanup mode enabled\n");
6785 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6788 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6789 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6790 dfprintk(MOUNT, " secinfo mode enabled\n");
6791 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6794 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6795 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6796 dfprintk(MOUNT, " stateid mode enabled\n");
6797 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6800 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6801 dfprintk(MOUNT, " write mode enabled\n");
6802 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6805 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6806 dfprintk(MOUNT, " commit mode enabled\n");
6807 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6815 * _nfs4_proc_exchange_id()
6817 * Wrapper for EXCHANGE_ID operation.
6819 static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6822 nfs4_verifier verifier;
6823 struct nfs41_exchange_id_args args = {
6824 .verifier = &verifier,
6826 #ifdef CONFIG_NFS_V4_1_MIGRATION
6827 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6828 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6829 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6831 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6832 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6835 struct nfs41_exchange_id_res res = {
6839 struct rpc_message msg = {
6840 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6846 nfs4_init_boot_verifier(clp, &verifier);
6847 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6849 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6850 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6851 args.id_len, args.id);
6853 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
6855 if (unlikely(res.server_owner == NULL)) {
6860 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
6862 if (unlikely(res.server_scope == NULL)) {
6864 goto out_server_owner;
6867 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
6868 if (unlikely(res.impl_id == NULL)) {
6870 goto out_server_scope;
6875 args.state_protect.how = SP4_NONE;
6879 args.state_protect = nfs4_sp4_mach_cred_request;
6886 goto out_server_scope;
6889 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6890 trace_nfs4_exchange_id(clp, status);
6892 status = nfs4_check_cl_exchange_flags(res.flags);
6895 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6898 clp->cl_clientid = res.clientid;
6899 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6900 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6901 clp->cl_seqid = res.seqid;
6903 kfree(clp->cl_serverowner);
6904 clp->cl_serverowner = res.server_owner;
6905 res.server_owner = NULL;
6907 /* use the most recent implementation id */
6908 kfree(clp->cl_implid);
6909 clp->cl_implid = res.impl_id;
6911 if (clp->cl_serverscope != NULL &&
6912 !nfs41_same_server_scope(clp->cl_serverscope,
6913 res.server_scope)) {
6914 dprintk("%s: server_scope mismatch detected\n",
6916 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
6917 kfree(clp->cl_serverscope);
6918 clp->cl_serverscope = NULL;
6921 if (clp->cl_serverscope == NULL) {
6922 clp->cl_serverscope = res.server_scope;
6929 kfree(res.server_owner);
6931 kfree(res.server_scope);
6933 if (clp->cl_implid != NULL)
6934 dprintk("NFS reply exchange_id: Server Implementation ID: "
6935 "domain: %s, name: %s, date: %llu,%u\n",
6936 clp->cl_implid->domain, clp->cl_implid->name,
6937 clp->cl_implid->date.seconds,
6938 clp->cl_implid->date.nseconds);
6939 dprintk("NFS reply exchange_id: %d\n", status);
6944 * nfs4_proc_exchange_id()
6946 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6948 * Since the clientid has expired, all compounds using sessions
6949 * associated with the stale clientid will be returning
6950 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6951 * be in some phase of session reset.
6953 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6955 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6957 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6960 /* try SP4_MACH_CRED if krb5i/p */
6961 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6962 authflavor == RPC_AUTH_GSS_KRB5P) {
6963 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6969 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6972 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6973 struct rpc_cred *cred)
6975 struct rpc_message msg = {
6976 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6982 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6983 trace_nfs4_destroy_clientid(clp, status);
6985 dprintk("NFS: Got error %d from the server %s on "
6986 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6990 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6991 struct rpc_cred *cred)
6996 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6997 ret = _nfs4_proc_destroy_clientid(clp, cred);
6999 case -NFS4ERR_DELAY:
7000 case -NFS4ERR_CLIENTID_BUSY:
7010 int nfs4_destroy_clientid(struct nfs_client *clp)
7012 struct rpc_cred *cred;
7015 if (clp->cl_mvops->minor_version < 1)
7017 if (clp->cl_exchange_flags == 0)
7019 if (clp->cl_preserve_clid)
7021 cred = nfs4_get_clid_cred(clp);
7022 ret = nfs4_proc_destroy_clientid(clp, cred);
7027 case -NFS4ERR_STALE_CLIENTID:
7028 clp->cl_exchange_flags = 0;
7034 struct nfs4_get_lease_time_data {
7035 struct nfs4_get_lease_time_args *args;
7036 struct nfs4_get_lease_time_res *res;
7037 struct nfs_client *clp;
7040 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7043 struct nfs4_get_lease_time_data *data =
7044 (struct nfs4_get_lease_time_data *)calldata;
7046 dprintk("--> %s\n", __func__);
7047 /* just setup sequence, do not trigger session recovery
7048 since we're invoked within one */
7049 nfs41_setup_sequence(data->clp->cl_session,
7050 &data->args->la_seq_args,
7051 &data->res->lr_seq_res,
7053 dprintk("<-- %s\n", __func__);
7057 * Called from nfs4_state_manager thread for session setup, so don't recover
7058 * from sequence operation or clientid errors.
7060 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7062 struct nfs4_get_lease_time_data *data =
7063 (struct nfs4_get_lease_time_data *)calldata;
7065 dprintk("--> %s\n", __func__);
7066 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7068 switch (task->tk_status) {
7069 case -NFS4ERR_DELAY:
7070 case -NFS4ERR_GRACE:
7071 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7072 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7073 task->tk_status = 0;
7075 case -NFS4ERR_RETRY_UNCACHED_REP:
7076 rpc_restart_call_prepare(task);
7079 dprintk("<-- %s\n", __func__);
7082 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
7083 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7084 .rpc_call_done = nfs4_get_lease_time_done,
7087 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7089 struct rpc_task *task;
7090 struct nfs4_get_lease_time_args args;
7091 struct nfs4_get_lease_time_res res = {
7092 .lr_fsinfo = fsinfo,
7094 struct nfs4_get_lease_time_data data = {
7099 struct rpc_message msg = {
7100 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7104 struct rpc_task_setup task_setup = {
7105 .rpc_client = clp->cl_rpcclient,
7106 .rpc_message = &msg,
7107 .callback_ops = &nfs4_get_lease_time_ops,
7108 .callback_data = &data,
7109 .flags = RPC_TASK_TIMEOUT,
7113 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
7114 nfs4_set_sequence_privileged(&args.la_seq_args);
7115 dprintk("--> %s\n", __func__);
7116 task = rpc_run_task(&task_setup);
7119 status = PTR_ERR(task);
7121 status = task->tk_status;
7124 dprintk("<-- %s return %d\n", __func__, status);
7130 * Initialize the values to be used by the client in CREATE_SESSION
7131 * If nfs4_init_session set the fore channel request and response sizes,
7134 * Set the back channel max_resp_sz_cached to zero to force the client to
7135 * always set csa_cachethis to FALSE because the current implementation
7136 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7138 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7140 unsigned int max_rqst_sz, max_resp_sz;
7142 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7143 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
7145 /* Fore channel attributes */
7146 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7147 args->fc_attrs.max_resp_sz = max_resp_sz;
7148 args->fc_attrs.max_ops = NFS4_MAX_OPS;
7149 args->fc_attrs.max_reqs = max_session_slots;
7151 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
7152 "max_ops=%u max_reqs=%u\n",
7154 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
7155 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
7157 /* Back channel attributes */
7158 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7159 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7160 args->bc_attrs.max_resp_sz_cached = 0;
7161 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7162 args->bc_attrs.max_reqs = 1;
7164 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7165 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7167 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7168 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7169 args->bc_attrs.max_reqs);
7172 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7173 struct nfs41_create_session_res *res)
7175 struct nfs4_channel_attrs *sent = &args->fc_attrs;
7176 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
7178 if (rcvd->max_resp_sz > sent->max_resp_sz)
7181 * Our requested max_ops is the minimum we need; we're not
7182 * prepared to break up compounds into smaller pieces than that.
7183 * So, no point even trying to continue if the server won't
7186 if (rcvd->max_ops < sent->max_ops)
7188 if (rcvd->max_reqs == 0)
7190 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7191 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
7195 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7196 struct nfs41_create_session_res *res)
7198 struct nfs4_channel_attrs *sent = &args->bc_attrs;
7199 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
7201 if (!(res->flags & SESSION4_BACK_CHAN))
7203 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7205 if (rcvd->max_resp_sz < sent->max_resp_sz)
7207 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7209 /* These would render the backchannel useless: */
7210 if (rcvd->max_ops != sent->max_ops)
7212 if (rcvd->max_reqs != sent->max_reqs)
7218 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7219 struct nfs41_create_session_res *res)
7223 ret = nfs4_verify_fore_channel_attrs(args, res);
7226 return nfs4_verify_back_channel_attrs(args, res);
7229 static void nfs4_update_session(struct nfs4_session *session,
7230 struct nfs41_create_session_res *res)
7232 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
7233 session->flags = res->flags;
7234 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
7235 if (res->flags & SESSION4_BACK_CHAN)
7236 memcpy(&session->bc_attrs, &res->bc_attrs,
7237 sizeof(session->bc_attrs));
7240 static int _nfs4_proc_create_session(struct nfs_client *clp,
7241 struct rpc_cred *cred)
7243 struct nfs4_session *session = clp->cl_session;
7244 struct nfs41_create_session_args args = {
7246 .clientid = clp->cl_clientid,
7247 .seqid = clp->cl_seqid,
7248 .cb_program = NFS4_CALLBACK,
7250 struct nfs41_create_session_res res;
7252 struct rpc_message msg = {
7253 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7260 nfs4_init_channel_attrs(&args);
7261 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
7263 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7264 trace_nfs4_create_session(clp, status);
7267 /* Verify the session's negotiated channel_attrs values */
7268 status = nfs4_verify_channel_attrs(&args, &res);
7269 /* Increment the clientid slot sequence id */
7270 if (clp->cl_seqid == res.seqid)
7274 nfs4_update_session(session, &res);
7281 * Issues a CREATE_SESSION operation to the server.
7282 * It is the responsibility of the caller to verify the session is
7283 * expired before calling this routine.
7285 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
7289 struct nfs4_session *session = clp->cl_session;
7291 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7293 status = _nfs4_proc_create_session(clp, cred);
7297 /* Init or reset the session slot tables */
7298 status = nfs4_setup_session_slot_tables(session);
7299 dprintk("slot table setup returned %d\n", status);
7303 ptr = (unsigned *)&session->sess_id.data[0];
7304 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7305 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
7307 dprintk("<-- %s\n", __func__);
7312 * Issue the over-the-wire RPC DESTROY_SESSION.
7313 * The caller must serialize access to this routine.
7315 int nfs4_proc_destroy_session(struct nfs4_session *session,
7316 struct rpc_cred *cred)
7318 struct rpc_message msg = {
7319 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7320 .rpc_argp = session,
7325 dprintk("--> nfs4_proc_destroy_session\n");
7327 /* session is still being setup */
7328 if (session->clp->cl_cons_state != NFS_CS_READY)
7331 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7332 trace_nfs4_destroy_session(session->clp, status);
7335 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
7336 "Session has been destroyed regardless...\n", status);
7338 dprintk("<-- nfs4_proc_destroy_session\n");
7343 * Renew the cl_session lease.
7345 struct nfs4_sequence_data {
7346 struct nfs_client *clp;
7347 struct nfs4_sequence_args args;
7348 struct nfs4_sequence_res res;
7351 static void nfs41_sequence_release(void *data)
7353 struct nfs4_sequence_data *calldata = data;
7354 struct nfs_client *clp = calldata->clp;
7356 if (atomic_read(&clp->cl_count) > 1)
7357 nfs4_schedule_state_renewal(clp);
7358 nfs_put_client(clp);
7362 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7364 switch(task->tk_status) {
7365 case -NFS4ERR_DELAY:
7366 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7369 nfs4_schedule_lease_recovery(clp);
7374 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
7376 struct nfs4_sequence_data *calldata = data;
7377 struct nfs_client *clp = calldata->clp;
7379 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7382 trace_nfs4_sequence(clp, task->tk_status);
7383 if (task->tk_status < 0) {
7384 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7385 if (atomic_read(&clp->cl_count) == 1)
7388 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7389 rpc_restart_call_prepare(task);
7393 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7395 dprintk("<-- %s\n", __func__);
7398 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7400 struct nfs4_sequence_data *calldata = data;
7401 struct nfs_client *clp = calldata->clp;
7402 struct nfs4_sequence_args *args;
7403 struct nfs4_sequence_res *res;
7405 args = task->tk_msg.rpc_argp;
7406 res = task->tk_msg.rpc_resp;
7408 nfs41_setup_sequence(clp->cl_session, args, res, task);
7411 static const struct rpc_call_ops nfs41_sequence_ops = {
7412 .rpc_call_done = nfs41_sequence_call_done,
7413 .rpc_call_prepare = nfs41_sequence_prepare,
7414 .rpc_release = nfs41_sequence_release,
7417 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7418 struct rpc_cred *cred,
7421 struct nfs4_sequence_data *calldata;
7422 struct rpc_message msg = {
7423 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7426 struct rpc_task_setup task_setup_data = {
7427 .rpc_client = clp->cl_rpcclient,
7428 .rpc_message = &msg,
7429 .callback_ops = &nfs41_sequence_ops,
7430 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
7433 if (!atomic_inc_not_zero(&clp->cl_count))
7434 return ERR_PTR(-EIO);
7435 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7436 if (calldata == NULL) {
7437 nfs_put_client(clp);
7438 return ERR_PTR(-ENOMEM);
7440 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
7442 nfs4_set_sequence_privileged(&calldata->args);
7443 msg.rpc_argp = &calldata->args;
7444 msg.rpc_resp = &calldata->res;
7445 calldata->clp = clp;
7446 task_setup_data.callback_data = calldata;
7448 return rpc_run_task(&task_setup_data);
7451 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
7453 struct rpc_task *task;
7456 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
7458 task = _nfs41_proc_sequence(clp, cred, false);
7460 ret = PTR_ERR(task);
7462 rpc_put_task_async(task);
7463 dprintk("<-- %s status=%d\n", __func__, ret);
7467 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7469 struct rpc_task *task;
7472 task = _nfs41_proc_sequence(clp, cred, true);
7474 ret = PTR_ERR(task);
7477 ret = rpc_wait_for_completion_task(task);
7479 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7481 if (task->tk_status == 0)
7482 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
7483 ret = task->tk_status;
7487 dprintk("<-- %s status=%d\n", __func__, ret);
7491 struct nfs4_reclaim_complete_data {
7492 struct nfs_client *clp;
7493 struct nfs41_reclaim_complete_args arg;
7494 struct nfs41_reclaim_complete_res res;
7497 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7499 struct nfs4_reclaim_complete_data *calldata = data;
7501 nfs41_setup_sequence(calldata->clp->cl_session,
7502 &calldata->arg.seq_args,
7503 &calldata->res.seq_res,
7507 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7509 switch(task->tk_status) {
7511 case -NFS4ERR_COMPLETE_ALREADY:
7512 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7514 case -NFS4ERR_DELAY:
7515 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7517 case -NFS4ERR_RETRY_UNCACHED_REP:
7520 nfs4_schedule_lease_recovery(clp);
7525 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7527 struct nfs4_reclaim_complete_data *calldata = data;
7528 struct nfs_client *clp = calldata->clp;
7529 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7531 dprintk("--> %s\n", __func__);
7532 if (!nfs41_sequence_done(task, res))
7535 trace_nfs4_reclaim_complete(clp, task->tk_status);
7536 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7537 rpc_restart_call_prepare(task);
7540 dprintk("<-- %s\n", __func__);
7543 static void nfs4_free_reclaim_complete_data(void *data)
7545 struct nfs4_reclaim_complete_data *calldata = data;
7550 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7551 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7552 .rpc_call_done = nfs4_reclaim_complete_done,
7553 .rpc_release = nfs4_free_reclaim_complete_data,
7557 * Issue a global reclaim complete.
7559 static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7560 struct rpc_cred *cred)
7562 struct nfs4_reclaim_complete_data *calldata;
7563 struct rpc_task *task;
7564 struct rpc_message msg = {
7565 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
7568 struct rpc_task_setup task_setup_data = {
7569 .rpc_client = clp->cl_rpcclient,
7570 .rpc_message = &msg,
7571 .callback_ops = &nfs4_reclaim_complete_call_ops,
7572 .flags = RPC_TASK_ASYNC,
7574 int status = -ENOMEM;
7576 dprintk("--> %s\n", __func__);
7577 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7578 if (calldata == NULL)
7580 calldata->clp = clp;
7581 calldata->arg.one_fs = 0;
7583 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
7584 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
7585 msg.rpc_argp = &calldata->arg;
7586 msg.rpc_resp = &calldata->res;
7587 task_setup_data.callback_data = calldata;
7588 task = rpc_run_task(&task_setup_data);
7590 status = PTR_ERR(task);
7593 status = nfs4_wait_for_completion_rpc_task(task);
7595 status = task->tk_status;
7599 dprintk("<-- %s status=%d\n", __func__, status);
7604 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7606 struct nfs4_layoutget *lgp = calldata;
7607 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
7608 struct nfs4_session *session = nfs4_get_session(server);
7610 dprintk("--> %s\n", __func__);
7611 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7612 * right now covering the LAYOUTGET we are about to send.
7613 * However, that is not so catastrophic, and there seems
7614 * to be no way to prevent it completely.
7616 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
7617 &lgp->res.seq_res, task))
7619 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7620 NFS_I(lgp->args.inode)->layout,
7622 lgp->args.ctx->state)) {
7623 rpc_exit(task, NFS4_OK);
7627 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7629 struct nfs4_layoutget *lgp = calldata;
7630 struct inode *inode = lgp->args.inode;
7631 struct nfs_server *server = NFS_SERVER(inode);
7632 struct pnfs_layout_hdr *lo;
7633 struct nfs4_state *state = NULL;
7634 unsigned long timeo, now, giveup;
7636 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
7638 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
7641 switch (task->tk_status) {
7645 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7646 * (or clients) writing to the same RAID stripe
7648 case -NFS4ERR_LAYOUTTRYLATER:
7650 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7651 * existing layout before getting a new one).
7653 case -NFS4ERR_RECALLCONFLICT:
7654 timeo = rpc_get_timeout(task->tk_client);
7655 giveup = lgp->args.timestamp + timeo;
7657 if (time_after(giveup, now)) {
7658 unsigned long delay;
7661 * - Not less then NFS4_POLL_RETRY_MIN.
7662 * - One last time a jiffie before we give up
7663 * - exponential backoff (time_now minus start_attempt)
7665 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7666 min((giveup - now - 1),
7667 now - lgp->args.timestamp));
7669 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7671 rpc_delay(task, delay);
7672 task->tk_status = 0;
7673 rpc_restart_call_prepare(task);
7674 goto out; /* Do not call nfs4_async_handle_error() */
7677 case -NFS4ERR_EXPIRED:
7678 case -NFS4ERR_BAD_STATEID:
7679 spin_lock(&inode->i_lock);
7680 lo = NFS_I(inode)->layout;
7681 if (!lo || list_empty(&lo->plh_segs)) {
7682 spin_unlock(&inode->i_lock);
7683 /* If the open stateid was bad, then recover it. */
7684 state = lgp->args.ctx->state;
7689 * Mark the bad layout state as invalid, then retry
7690 * with the current stateid.
7692 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7693 spin_unlock(&inode->i_lock);
7694 pnfs_free_lseg_list(&head);
7696 task->tk_status = 0;
7697 rpc_restart_call_prepare(task);
7700 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN)
7701 rpc_restart_call_prepare(task);
7703 dprintk("<-- %s\n", __func__);
7706 static size_t max_response_pages(struct nfs_server *server)
7708 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7709 return nfs_page_array_len(0, max_resp_sz);
7712 static void nfs4_free_pages(struct page **pages, size_t size)
7719 for (i = 0; i < size; i++) {
7722 __free_page(pages[i]);
7727 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7729 struct page **pages;
7732 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7734 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7738 for (i = 0; i < size; i++) {
7739 pages[i] = alloc_page(gfp_flags);
7741 dprintk("%s: failed to allocate page\n", __func__);
7742 nfs4_free_pages(pages, size);
7750 static void nfs4_layoutget_release(void *calldata)
7752 struct nfs4_layoutget *lgp = calldata;
7753 struct inode *inode = lgp->args.inode;
7754 struct nfs_server *server = NFS_SERVER(inode);
7755 size_t max_pages = max_response_pages(server);
7757 dprintk("--> %s\n", __func__);
7758 nfs4_free_pages(lgp->args.layout.pages, max_pages);
7759 pnfs_put_layout_hdr(NFS_I(inode)->layout);
7760 put_nfs_open_context(lgp->args.ctx);
7762 dprintk("<-- %s\n", __func__);
7765 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7766 .rpc_call_prepare = nfs4_layoutget_prepare,
7767 .rpc_call_done = nfs4_layoutget_done,
7768 .rpc_release = nfs4_layoutget_release,
7771 struct pnfs_layout_segment *
7772 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
7774 struct inode *inode = lgp->args.inode;
7775 struct nfs_server *server = NFS_SERVER(inode);
7776 size_t max_pages = max_response_pages(server);
7777 struct rpc_task *task;
7778 struct rpc_message msg = {
7779 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7780 .rpc_argp = &lgp->args,
7781 .rpc_resp = &lgp->res,
7782 .rpc_cred = lgp->cred,
7784 struct rpc_task_setup task_setup_data = {
7785 .rpc_client = server->client,
7786 .rpc_message = &msg,
7787 .callback_ops = &nfs4_layoutget_call_ops,
7788 .callback_data = lgp,
7789 .flags = RPC_TASK_ASYNC,
7791 struct pnfs_layout_segment *lseg = NULL;
7794 dprintk("--> %s\n", __func__);
7796 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7797 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7799 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7800 if (!lgp->args.layout.pages) {
7801 nfs4_layoutget_release(lgp);
7802 return ERR_PTR(-ENOMEM);
7804 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
7805 lgp->args.timestamp = jiffies;
7807 lgp->res.layoutp = &lgp->args.layout;
7808 lgp->res.seq_res.sr_slot = NULL;
7809 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
7811 task = rpc_run_task(&task_setup_data);
7813 return ERR_CAST(task);
7814 status = nfs4_wait_for_completion_rpc_task(task);
7816 status = task->tk_status;
7817 trace_nfs4_layoutget(lgp->args.ctx,
7821 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7822 if (status == 0 && lgp->res.layoutp->len)
7823 lseg = pnfs_layout_process(lgp);
7825 dprintk("<-- %s status=%d\n", __func__, status);
7827 return ERR_PTR(status);
7832 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7834 struct nfs4_layoutreturn *lrp = calldata;
7836 dprintk("--> %s\n", __func__);
7837 nfs41_setup_sequence(lrp->clp->cl_session,
7838 &lrp->args.seq_args,
7843 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7845 struct nfs4_layoutreturn *lrp = calldata;
7846 struct nfs_server *server;
7848 dprintk("--> %s\n", __func__);
7850 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
7853 server = NFS_SERVER(lrp->args.inode);
7854 switch (task->tk_status) {
7856 task->tk_status = 0;
7859 case -NFS4ERR_DELAY:
7860 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
7862 rpc_restart_call_prepare(task);
7865 dprintk("<-- %s\n", __func__);
7868 static void nfs4_layoutreturn_release(void *calldata)
7870 struct nfs4_layoutreturn *lrp = calldata;
7871 struct pnfs_layout_hdr *lo = lrp->args.layout;
7873 dprintk("--> %s\n", __func__);
7874 spin_lock(&lo->plh_inode->i_lock);
7875 if (lrp->res.lrs_present)
7876 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7877 pnfs_clear_layoutreturn_waitbit(lo);
7878 clear_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE, &lo->plh_flags);
7879 rpc_wake_up(&NFS_SERVER(lo->plh_inode)->roc_rpcwaitq);
7880 lo->plh_block_lgets--;
7881 spin_unlock(&lo->plh_inode->i_lock);
7882 pnfs_put_layout_hdr(lrp->args.layout);
7883 nfs_iput_and_deactive(lrp->inode);
7885 dprintk("<-- %s\n", __func__);
7888 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7889 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7890 .rpc_call_done = nfs4_layoutreturn_done,
7891 .rpc_release = nfs4_layoutreturn_release,
7894 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
7896 struct rpc_task *task;
7897 struct rpc_message msg = {
7898 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7899 .rpc_argp = &lrp->args,
7900 .rpc_resp = &lrp->res,
7901 .rpc_cred = lrp->cred,
7903 struct rpc_task_setup task_setup_data = {
7904 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
7905 .rpc_message = &msg,
7906 .callback_ops = &nfs4_layoutreturn_call_ops,
7907 .callback_data = lrp,
7911 dprintk("--> %s\n", __func__);
7913 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
7915 nfs4_layoutreturn_release(lrp);
7918 task_setup_data.flags |= RPC_TASK_ASYNC;
7920 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
7921 task = rpc_run_task(&task_setup_data);
7923 return PTR_ERR(task);
7925 status = task->tk_status;
7926 trace_nfs4_layoutreturn(lrp->args.inode, status);
7927 dprintk("<-- %s status=%d\n", __func__, status);
7933 _nfs4_proc_getdeviceinfo(struct nfs_server *server,
7934 struct pnfs_device *pdev,
7935 struct rpc_cred *cred)
7937 struct nfs4_getdeviceinfo_args args = {
7940 struct nfs4_getdeviceinfo_res res = {
7943 struct rpc_message msg = {
7944 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7951 dprintk("--> %s\n", __func__);
7952 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
7953 dprintk("<-- %s status=%d\n", __func__, status);
7958 int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7959 struct pnfs_device *pdev,
7960 struct rpc_cred *cred)
7962 struct nfs4_exception exception = { };
7966 err = nfs4_handle_exception(server,
7967 _nfs4_proc_getdeviceinfo(server, pdev, cred),
7969 } while (exception.retry);
7972 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7974 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7976 struct nfs4_layoutcommit_data *data = calldata;
7977 struct nfs_server *server = NFS_SERVER(data->args.inode);
7978 struct nfs4_session *session = nfs4_get_session(server);
7980 nfs41_setup_sequence(session,
7981 &data->args.seq_args,
7987 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7989 struct nfs4_layoutcommit_data *data = calldata;
7990 struct nfs_server *server = NFS_SERVER(data->args.inode);
7992 if (!nfs41_sequence_done(task, &data->res.seq_res))
7995 switch (task->tk_status) { /* Just ignore these failures */
7996 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7997 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7998 case -NFS4ERR_BADLAYOUT: /* no layout */
7999 case -NFS4ERR_GRACE: /* loca_recalim always false */
8000 task->tk_status = 0;
8004 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
8005 rpc_restart_call_prepare(task);
8011 static void nfs4_layoutcommit_release(void *calldata)
8013 struct nfs4_layoutcommit_data *data = calldata;
8015 pnfs_cleanup_layoutcommit(data);
8016 nfs_post_op_update_inode_force_wcc(data->args.inode,
8018 put_rpccred(data->cred);
8019 nfs_iput_and_deactive(data->inode);
8023 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8024 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8025 .rpc_call_done = nfs4_layoutcommit_done,
8026 .rpc_release = nfs4_layoutcommit_release,
8030 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
8032 struct rpc_message msg = {
8033 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8034 .rpc_argp = &data->args,
8035 .rpc_resp = &data->res,
8036 .rpc_cred = data->cred,
8038 struct rpc_task_setup task_setup_data = {
8039 .task = &data->task,
8040 .rpc_client = NFS_CLIENT(data->args.inode),
8041 .rpc_message = &msg,
8042 .callback_ops = &nfs4_layoutcommit_ops,
8043 .callback_data = data,
8045 struct rpc_task *task;
8048 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
8049 "lbw: %llu inode %lu\n",
8050 data->task.tk_pid, sync,
8051 data->args.lastbytewritten,
8052 data->args.inode->i_ino);
8055 data->inode = nfs_igrab_and_active(data->args.inode);
8056 if (data->inode == NULL) {
8057 nfs4_layoutcommit_release(data);
8060 task_setup_data.flags = RPC_TASK_ASYNC;
8062 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
8063 task = rpc_run_task(&task_setup_data);
8065 return PTR_ERR(task);
8067 status = task->tk_status;
8068 trace_nfs4_layoutcommit(data->args.inode, status);
8069 dprintk("%s: status %d\n", __func__, status);
8075 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8076 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8079 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8080 struct nfs_fsinfo *info,
8081 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
8083 struct nfs41_secinfo_no_name_args args = {
8084 .style = SECINFO_STYLE_CURRENT_FH,
8086 struct nfs4_secinfo_res res = {
8089 struct rpc_message msg = {
8090 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8094 struct rpc_clnt *clnt = server->client;
8095 struct rpc_cred *cred = NULL;
8098 if (use_integrity) {
8099 clnt = server->nfs_client->cl_rpcclient;
8100 cred = nfs4_get_clid_cred(server->nfs_client);
8101 msg.rpc_cred = cred;
8104 dprintk("--> %s\n", __func__);
8105 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8107 dprintk("<-- %s status=%d\n", __func__, status);
8116 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8117 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8119 struct nfs4_exception exception = { };
8122 /* first try using integrity protection */
8123 err = -NFS4ERR_WRONGSEC;
8125 /* try to use integrity protection with machine cred */
8126 if (_nfs4_is_integrity_protected(server->nfs_client))
8127 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8131 * if unable to use integrity protection, or SECINFO with
8132 * integrity protection returns NFS4ERR_WRONGSEC (which is
8133 * disallowed by spec, but exists in deployed servers) use
8134 * the current filesystem's rpc_client and the user cred.
8136 if (err == -NFS4ERR_WRONGSEC)
8137 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8142 case -NFS4ERR_WRONGSEC:
8146 err = nfs4_handle_exception(server, err, &exception);
8148 } while (exception.retry);
8154 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8155 struct nfs_fsinfo *info)
8159 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
8160 struct nfs4_secinfo_flavors *flavors;
8161 struct nfs4_secinfo4 *secinfo;
8164 page = alloc_page(GFP_KERNEL);
8170 flavors = page_address(page);
8171 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8174 * Fall back on "guess and check" method if
8175 * the server doesn't support SECINFO_NO_NAME
8177 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
8178 err = nfs4_find_root_sec(server, fhandle, info);
8184 for (i = 0; i < flavors->num_flavors; i++) {
8185 secinfo = &flavors->flavors[i];
8187 switch (secinfo->flavor) {
8191 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8192 &secinfo->flavor_info);
8195 flavor = RPC_AUTH_MAXFLAVOR;
8199 if (!nfs_auth_info_match(&server->auth_info, flavor))
8200 flavor = RPC_AUTH_MAXFLAVOR;
8202 if (flavor != RPC_AUTH_MAXFLAVOR) {
8203 err = nfs4_lookup_root_sec(server, fhandle,
8210 if (flavor == RPC_AUTH_MAXFLAVOR)
8221 static int _nfs41_test_stateid(struct nfs_server *server,
8222 nfs4_stateid *stateid,
8223 struct rpc_cred *cred)
8226 struct nfs41_test_stateid_args args = {
8229 struct nfs41_test_stateid_res res;
8230 struct rpc_message msg = {
8231 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8236 struct rpc_clnt *rpc_client = server->client;
8238 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8241 dprintk("NFS call test_stateid %p\n", stateid);
8242 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8243 nfs4_set_sequence_privileged(&args.seq_args);
8244 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8245 &args.seq_args, &res.seq_res);
8246 if (status != NFS_OK) {
8247 dprintk("NFS reply test_stateid: failed, %d\n", status);
8250 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
8255 * nfs41_test_stateid - perform a TEST_STATEID operation
8257 * @server: server / transport on which to perform the operation
8258 * @stateid: state ID to test
8261 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8262 * Otherwise a negative NFS4ERR value is returned if the operation
8263 * failed or the state ID is not currently valid.
8265 static int nfs41_test_stateid(struct nfs_server *server,
8266 nfs4_stateid *stateid,
8267 struct rpc_cred *cred)
8269 struct nfs4_exception exception = { };
8272 err = _nfs41_test_stateid(server, stateid, cred);
8273 if (err != -NFS4ERR_DELAY)
8275 nfs4_handle_exception(server, err, &exception);
8276 } while (exception.retry);
8280 struct nfs_free_stateid_data {
8281 struct nfs_server *server;
8282 struct nfs41_free_stateid_args args;
8283 struct nfs41_free_stateid_res res;
8286 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8288 struct nfs_free_stateid_data *data = calldata;
8289 nfs41_setup_sequence(nfs4_get_session(data->server),
8290 &data->args.seq_args,
8295 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8297 struct nfs_free_stateid_data *data = calldata;
8299 nfs41_sequence_done(task, &data->res.seq_res);
8301 switch (task->tk_status) {
8302 case -NFS4ERR_DELAY:
8303 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
8304 rpc_restart_call_prepare(task);
8308 static void nfs41_free_stateid_release(void *calldata)
8313 static const struct rpc_call_ops nfs41_free_stateid_ops = {
8314 .rpc_call_prepare = nfs41_free_stateid_prepare,
8315 .rpc_call_done = nfs41_free_stateid_done,
8316 .rpc_release = nfs41_free_stateid_release,
8319 static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8320 nfs4_stateid *stateid,
8321 struct rpc_cred *cred,
8324 struct rpc_message msg = {
8325 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
8328 struct rpc_task_setup task_setup = {
8329 .rpc_client = server->client,
8330 .rpc_message = &msg,
8331 .callback_ops = &nfs41_free_stateid_ops,
8332 .flags = RPC_TASK_ASYNC,
8334 struct nfs_free_stateid_data *data;
8336 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8337 &task_setup.rpc_client, &msg);
8339 dprintk("NFS call free_stateid %p\n", stateid);
8340 data = kmalloc(sizeof(*data), GFP_NOFS);
8342 return ERR_PTR(-ENOMEM);
8343 data->server = server;
8344 nfs4_stateid_copy(&data->args.stateid, stateid);
8346 task_setup.callback_data = data;
8348 msg.rpc_argp = &data->args;
8349 msg.rpc_resp = &data->res;
8350 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
8352 nfs4_set_sequence_privileged(&data->args.seq_args);
8354 return rpc_run_task(&task_setup);
8358 * nfs41_free_stateid - perform a FREE_STATEID operation
8360 * @server: server / transport on which to perform the operation
8361 * @stateid: state ID to release
8364 * Returns NFS_OK if the server freed "stateid". Otherwise a
8365 * negative NFS4ERR value is returned.
8367 static int nfs41_free_stateid(struct nfs_server *server,
8368 nfs4_stateid *stateid,
8369 struct rpc_cred *cred)
8371 struct rpc_task *task;
8374 task = _nfs41_free_stateid(server, stateid, cred, true);
8376 return PTR_ERR(task);
8377 ret = rpc_wait_for_completion_task(task);
8379 ret = task->tk_status;
8385 nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
8387 struct rpc_task *task;
8388 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
8390 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
8391 nfs4_free_lock_state(server, lsp);
8397 static bool nfs41_match_stateid(const nfs4_stateid *s1,
8398 const nfs4_stateid *s2)
8400 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
8403 if (s1->seqid == s2->seqid)
8405 if (s1->seqid == 0 || s2->seqid == 0)
8411 #endif /* CONFIG_NFS_V4_1 */
8413 static bool nfs4_match_stateid(const nfs4_stateid *s1,
8414 const nfs4_stateid *s2)
8416 return nfs4_stateid_match(s1, s2);
8420 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
8421 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8422 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8423 .recover_open = nfs4_open_reclaim,
8424 .recover_lock = nfs4_lock_reclaim,
8425 .establish_clid = nfs4_init_clientid,
8426 .detect_trunking = nfs40_discover_server_trunking,
8429 #if defined(CONFIG_NFS_V4_1)
8430 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
8431 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8432 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8433 .recover_open = nfs4_open_reclaim,
8434 .recover_lock = nfs4_lock_reclaim,
8435 .establish_clid = nfs41_init_clientid,
8436 .reclaim_complete = nfs41_proc_reclaim_complete,
8437 .detect_trunking = nfs41_discover_server_trunking,
8439 #endif /* CONFIG_NFS_V4_1 */
8441 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
8442 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8443 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8444 .recover_open = nfs40_open_expired,
8445 .recover_lock = nfs4_lock_expired,
8446 .establish_clid = nfs4_init_clientid,
8449 #if defined(CONFIG_NFS_V4_1)
8450 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
8451 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8452 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8453 .recover_open = nfs41_open_expired,
8454 .recover_lock = nfs41_lock_expired,
8455 .establish_clid = nfs41_init_clientid,
8457 #endif /* CONFIG_NFS_V4_1 */
8459 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
8460 .sched_state_renewal = nfs4_proc_async_renew,
8461 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8462 .renew_lease = nfs4_proc_renew,
8465 #if defined(CONFIG_NFS_V4_1)
8466 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
8467 .sched_state_renewal = nfs41_proc_async_sequence,
8468 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8469 .renew_lease = nfs4_proc_sequence,
8473 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
8474 .get_locations = _nfs40_proc_get_locations,
8475 .fsid_present = _nfs40_proc_fsid_present,
8478 #if defined(CONFIG_NFS_V4_1)
8479 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
8480 .get_locations = _nfs41_proc_get_locations,
8481 .fsid_present = _nfs41_proc_fsid_present,
8483 #endif /* CONFIG_NFS_V4_1 */
8485 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8487 .init_caps = NFS_CAP_READDIRPLUS
8488 | NFS_CAP_ATOMIC_OPEN
8489 | NFS_CAP_CHANGE_ATTR
8490 | NFS_CAP_POSIX_LOCK,
8491 .init_client = nfs40_init_client,
8492 .shutdown_client = nfs40_shutdown_client,
8493 .match_stateid = nfs4_match_stateid,
8494 .find_root_sec = nfs4_find_root_sec,
8495 .free_lock_state = nfs4_release_lockowner,
8496 .alloc_seqid = nfs_alloc_seqid,
8497 .call_sync_ops = &nfs40_call_sync_ops,
8498 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8499 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8500 .state_renewal_ops = &nfs40_state_renewal_ops,
8501 .mig_recovery_ops = &nfs40_mig_recovery_ops,
8504 #if defined(CONFIG_NFS_V4_1)
8505 static struct nfs_seqid *
8506 nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8511 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8513 .init_caps = NFS_CAP_READDIRPLUS
8514 | NFS_CAP_ATOMIC_OPEN
8515 | NFS_CAP_CHANGE_ATTR
8516 | NFS_CAP_POSIX_LOCK
8517 | NFS_CAP_STATEID_NFSV41
8518 | NFS_CAP_ATOMIC_OPEN_V1,
8519 .init_client = nfs41_init_client,
8520 .shutdown_client = nfs41_shutdown_client,
8521 .match_stateid = nfs41_match_stateid,
8522 .find_root_sec = nfs41_find_root_sec,
8523 .free_lock_state = nfs41_free_lock_state,
8524 .alloc_seqid = nfs_alloc_no_seqid,
8525 .call_sync_ops = &nfs41_call_sync_ops,
8526 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8527 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8528 .state_renewal_ops = &nfs41_state_renewal_ops,
8529 .mig_recovery_ops = &nfs41_mig_recovery_ops,
8533 #if defined(CONFIG_NFS_V4_2)
8534 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8536 .init_caps = NFS_CAP_READDIRPLUS
8537 | NFS_CAP_ATOMIC_OPEN
8538 | NFS_CAP_CHANGE_ATTR
8539 | NFS_CAP_POSIX_LOCK
8540 | NFS_CAP_STATEID_NFSV41
8541 | NFS_CAP_ATOMIC_OPEN_V1
8543 | NFS_CAP_DEALLOCATE
8545 .init_client = nfs41_init_client,
8546 .shutdown_client = nfs41_shutdown_client,
8547 .match_stateid = nfs41_match_stateid,
8548 .find_root_sec = nfs41_find_root_sec,
8549 .free_lock_state = nfs41_free_lock_state,
8550 .call_sync_ops = &nfs41_call_sync_ops,
8551 .alloc_seqid = nfs_alloc_no_seqid,
8552 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8553 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8554 .state_renewal_ops = &nfs41_state_renewal_ops,
8558 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8559 [0] = &nfs_v4_0_minor_ops,
8560 #if defined(CONFIG_NFS_V4_1)
8561 [1] = &nfs_v4_1_minor_ops,
8563 #if defined(CONFIG_NFS_V4_2)
8564 [2] = &nfs_v4_2_minor_ops,
8568 static const struct inode_operations nfs4_dir_inode_operations = {
8569 .create = nfs_create,
8570 .lookup = nfs_lookup,
8571 .atomic_open = nfs_atomic_open,
8573 .unlink = nfs_unlink,
8574 .symlink = nfs_symlink,
8578 .rename = nfs_rename,
8579 .permission = nfs_permission,
8580 .getattr = nfs_getattr,
8581 .setattr = nfs_setattr,
8582 .getxattr = generic_getxattr,
8583 .setxattr = generic_setxattr,
8584 .listxattr = generic_listxattr,
8585 .removexattr = generic_removexattr,
8588 static const struct inode_operations nfs4_file_inode_operations = {
8589 .permission = nfs_permission,
8590 .getattr = nfs_getattr,
8591 .setattr = nfs_setattr,
8592 .getxattr = generic_getxattr,
8593 .setxattr = generic_setxattr,
8594 .listxattr = generic_listxattr,
8595 .removexattr = generic_removexattr,
8598 const struct nfs_rpc_ops nfs_v4_clientops = {
8599 .version = 4, /* protocol version */
8600 .dentry_ops = &nfs4_dentry_operations,
8601 .dir_inode_ops = &nfs4_dir_inode_operations,
8602 .file_inode_ops = &nfs4_file_inode_operations,
8603 .file_ops = &nfs4_file_operations,
8604 .getroot = nfs4_proc_get_root,
8605 .submount = nfs4_submount,
8606 .try_mount = nfs4_try_mount,
8607 .getattr = nfs4_proc_getattr,
8608 .setattr = nfs4_proc_setattr,
8609 .lookup = nfs4_proc_lookup,
8610 .access = nfs4_proc_access,
8611 .readlink = nfs4_proc_readlink,
8612 .create = nfs4_proc_create,
8613 .remove = nfs4_proc_remove,
8614 .unlink_setup = nfs4_proc_unlink_setup,
8615 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
8616 .unlink_done = nfs4_proc_unlink_done,
8617 .rename_setup = nfs4_proc_rename_setup,
8618 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
8619 .rename_done = nfs4_proc_rename_done,
8620 .link = nfs4_proc_link,
8621 .symlink = nfs4_proc_symlink,
8622 .mkdir = nfs4_proc_mkdir,
8623 .rmdir = nfs4_proc_remove,
8624 .readdir = nfs4_proc_readdir,
8625 .mknod = nfs4_proc_mknod,
8626 .statfs = nfs4_proc_statfs,
8627 .fsinfo = nfs4_proc_fsinfo,
8628 .pathconf = nfs4_proc_pathconf,
8629 .set_capabilities = nfs4_server_capabilities,
8630 .decode_dirent = nfs4_decode_dirent,
8631 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
8632 .read_setup = nfs4_proc_read_setup,
8633 .read_done = nfs4_read_done,
8634 .write_setup = nfs4_proc_write_setup,
8635 .write_done = nfs4_write_done,
8636 .commit_setup = nfs4_proc_commit_setup,
8637 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
8638 .commit_done = nfs4_commit_done,
8639 .lock = nfs4_proc_lock,
8640 .clear_acl_cache = nfs4_zap_acl_attr,
8641 .close_context = nfs4_close_context,
8642 .open_context = nfs4_atomic_open,
8643 .have_delegation = nfs4_have_delegation,
8644 .return_delegation = nfs4_inode_return_delegation,
8645 .alloc_client = nfs4_alloc_client,
8646 .init_client = nfs4_init_client,
8647 .free_client = nfs4_free_client,
8648 .create_server = nfs4_create_server,
8649 .clone_server = nfs_clone_server,
8652 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8653 .prefix = XATTR_NAME_NFSV4_ACL,
8654 .list = nfs4_xattr_list_nfs4_acl,
8655 .get = nfs4_xattr_get_nfs4_acl,
8656 .set = nfs4_xattr_set_nfs4_acl,
8659 const struct xattr_handler *nfs4_xattr_handlers[] = {
8660 &nfs4_xattr_nfs4_acl_handler,
8661 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
8662 &nfs4_xattr_nfs4_label_handler,