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 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1556 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1557 nfs4_init_opendata_res(opendata);
1558 ret = _nfs4_recover_proc_open(opendata);
1561 newstate = nfs4_opendata_to_nfs4_state(opendata);
1562 if (IS_ERR(newstate))
1563 return PTR_ERR(newstate);
1564 nfs4_close_state(newstate, fmode);
1569 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1571 struct nfs4_state *newstate;
1574 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1575 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1576 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1577 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1578 /* memory barrier prior to reading state->n_* */
1579 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1580 clear_bit(NFS_OPEN_STATE, &state->flags);
1582 if (state->n_rdwr != 0) {
1583 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1586 if (newstate != state)
1589 if (state->n_wronly != 0) {
1590 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1593 if (newstate != state)
1596 if (state->n_rdonly != 0) {
1597 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1600 if (newstate != state)
1604 * We may have performed cached opens for all three recoveries.
1605 * Check if we need to update the current stateid.
1607 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1608 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1609 write_seqlock(&state->seqlock);
1610 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1611 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1612 write_sequnlock(&state->seqlock);
1619 * reclaim state on the server after a reboot.
1621 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1623 struct nfs_delegation *delegation;
1624 struct nfs4_opendata *opendata;
1625 fmode_t delegation_type = 0;
1628 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1629 NFS4_OPEN_CLAIM_PREVIOUS);
1630 if (IS_ERR(opendata))
1631 return PTR_ERR(opendata);
1633 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1634 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1635 delegation_type = delegation->type;
1637 opendata->o_arg.u.delegation_type = delegation_type;
1638 status = nfs4_open_recover(opendata, state);
1639 nfs4_opendata_put(opendata);
1643 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1645 struct nfs_server *server = NFS_SERVER(state->inode);
1646 struct nfs4_exception exception = { };
1649 err = _nfs4_do_open_reclaim(ctx, state);
1650 trace_nfs4_open_reclaim(ctx, 0, err);
1651 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1653 if (err != -NFS4ERR_DELAY)
1655 nfs4_handle_exception(server, err, &exception);
1656 } while (exception.retry);
1660 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1662 struct nfs_open_context *ctx;
1665 ctx = nfs4_state_find_open_context(state);
1668 ret = nfs4_do_open_reclaim(ctx, state);
1669 put_nfs_open_context(ctx);
1673 static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1677 printk(KERN_ERR "NFS: %s: unhandled error "
1678 "%d.\n", __func__, err);
1683 case -NFS4ERR_BADSESSION:
1684 case -NFS4ERR_BADSLOT:
1685 case -NFS4ERR_BAD_HIGH_SLOT:
1686 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1687 case -NFS4ERR_DEADSESSION:
1688 set_bit(NFS_DELEGATED_STATE, &state->flags);
1689 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1691 case -NFS4ERR_STALE_CLIENTID:
1692 case -NFS4ERR_STALE_STATEID:
1693 set_bit(NFS_DELEGATED_STATE, &state->flags);
1694 case -NFS4ERR_EXPIRED:
1695 /* Don't recall a delegation if it was lost */
1696 nfs4_schedule_lease_recovery(server->nfs_client);
1698 case -NFS4ERR_MOVED:
1699 nfs4_schedule_migration_recovery(server);
1701 case -NFS4ERR_LEASE_MOVED:
1702 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1704 case -NFS4ERR_DELEG_REVOKED:
1705 case -NFS4ERR_ADMIN_REVOKED:
1706 case -NFS4ERR_BAD_STATEID:
1707 case -NFS4ERR_OPENMODE:
1708 nfs_inode_find_state_and_recover(state->inode,
1710 nfs4_schedule_stateid_recovery(server, state);
1712 case -NFS4ERR_DELAY:
1713 case -NFS4ERR_GRACE:
1714 set_bit(NFS_DELEGATED_STATE, &state->flags);
1718 case -NFS4ERR_DENIED:
1719 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1725 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1727 struct nfs_server *server = NFS_SERVER(state->inode);
1728 struct nfs4_opendata *opendata;
1731 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1732 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1733 if (IS_ERR(opendata))
1734 return PTR_ERR(opendata);
1735 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1736 err = nfs4_open_recover(opendata, state);
1737 nfs4_opendata_put(opendata);
1738 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1741 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1743 struct nfs4_opendata *data = calldata;
1745 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
1746 &data->c_arg.seq_args, &data->c_res.seq_res, task);
1749 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1751 struct nfs4_opendata *data = calldata;
1753 nfs40_sequence_done(task, &data->c_res.seq_res);
1755 data->rpc_status = task->tk_status;
1756 if (data->rpc_status == 0) {
1757 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1758 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1759 renew_lease(data->o_res.server, data->timestamp);
1764 static void nfs4_open_confirm_release(void *calldata)
1766 struct nfs4_opendata *data = calldata;
1767 struct nfs4_state *state = NULL;
1769 /* If this request hasn't been cancelled, do nothing */
1770 if (data->cancelled == 0)
1772 /* In case of error, no cleanup! */
1773 if (!data->rpc_done)
1775 state = nfs4_opendata_to_nfs4_state(data);
1777 nfs4_close_state(state, data->o_arg.fmode);
1779 nfs4_opendata_put(data);
1782 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1783 .rpc_call_prepare = nfs4_open_confirm_prepare,
1784 .rpc_call_done = nfs4_open_confirm_done,
1785 .rpc_release = nfs4_open_confirm_release,
1789 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1791 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1793 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1794 struct rpc_task *task;
1795 struct rpc_message msg = {
1796 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1797 .rpc_argp = &data->c_arg,
1798 .rpc_resp = &data->c_res,
1799 .rpc_cred = data->owner->so_cred,
1801 struct rpc_task_setup task_setup_data = {
1802 .rpc_client = server->client,
1803 .rpc_message = &msg,
1804 .callback_ops = &nfs4_open_confirm_ops,
1805 .callback_data = data,
1806 .workqueue = nfsiod_workqueue,
1807 .flags = RPC_TASK_ASYNC,
1811 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
1812 kref_get(&data->kref);
1814 data->rpc_status = 0;
1815 data->timestamp = jiffies;
1816 task = rpc_run_task(&task_setup_data);
1818 return PTR_ERR(task);
1819 status = nfs4_wait_for_completion_rpc_task(task);
1821 data->cancelled = 1;
1824 status = data->rpc_status;
1829 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1831 struct nfs4_opendata *data = calldata;
1832 struct nfs4_state_owner *sp = data->owner;
1833 struct nfs_client *clp = sp->so_server->nfs_client;
1835 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1838 * Check if we still need to send an OPEN call, or if we can use
1839 * a delegation instead.
1841 if (data->state != NULL) {
1842 struct nfs_delegation *delegation;
1844 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1847 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1848 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1849 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
1850 can_open_delegated(delegation, data->o_arg.fmode))
1851 goto unlock_no_action;
1854 /* Update client id. */
1855 data->o_arg.clientid = clp->cl_clientid;
1856 switch (data->o_arg.claim) {
1857 case NFS4_OPEN_CLAIM_PREVIOUS:
1858 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1859 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1860 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
1861 case NFS4_OPEN_CLAIM_FH:
1862 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1863 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1865 data->timestamp = jiffies;
1866 if (nfs4_setup_sequence(data->o_arg.server,
1867 &data->o_arg.seq_args,
1868 &data->o_res.seq_res,
1870 nfs_release_seqid(data->o_arg.seqid);
1872 /* Set the create mode (note dependency on the session type) */
1873 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1874 if (data->o_arg.open_flags & O_EXCL) {
1875 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1876 if (nfs4_has_persistent_session(clp))
1877 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1878 else if (clp->cl_mvops->minor_version > 0)
1879 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1885 task->tk_action = NULL;
1887 nfs4_sequence_done(task, &data->o_res.seq_res);
1890 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1892 struct nfs4_opendata *data = calldata;
1894 data->rpc_status = task->tk_status;
1896 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1899 if (task->tk_status == 0) {
1900 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1901 switch (data->o_res.f_attr->mode & S_IFMT) {
1905 data->rpc_status = -ELOOP;
1908 data->rpc_status = -EISDIR;
1911 data->rpc_status = -ENOTDIR;
1914 renew_lease(data->o_res.server, data->timestamp);
1915 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1916 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1921 static void nfs4_open_release(void *calldata)
1923 struct nfs4_opendata *data = calldata;
1924 struct nfs4_state *state = NULL;
1926 /* If this request hasn't been cancelled, do nothing */
1927 if (data->cancelled == 0)
1929 /* In case of error, no cleanup! */
1930 if (data->rpc_status != 0 || !data->rpc_done)
1932 /* In case we need an open_confirm, no cleanup! */
1933 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1935 state = nfs4_opendata_to_nfs4_state(data);
1937 nfs4_close_state(state, data->o_arg.fmode);
1939 nfs4_opendata_put(data);
1942 static const struct rpc_call_ops nfs4_open_ops = {
1943 .rpc_call_prepare = nfs4_open_prepare,
1944 .rpc_call_done = nfs4_open_done,
1945 .rpc_release = nfs4_open_release,
1948 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1950 struct inode *dir = data->dir->d_inode;
1951 struct nfs_server *server = NFS_SERVER(dir);
1952 struct nfs_openargs *o_arg = &data->o_arg;
1953 struct nfs_openres *o_res = &data->o_res;
1954 struct rpc_task *task;
1955 struct rpc_message msg = {
1956 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1959 .rpc_cred = data->owner->so_cred,
1961 struct rpc_task_setup task_setup_data = {
1962 .rpc_client = server->client,
1963 .rpc_message = &msg,
1964 .callback_ops = &nfs4_open_ops,
1965 .callback_data = data,
1966 .workqueue = nfsiod_workqueue,
1967 .flags = RPC_TASK_ASYNC,
1971 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1972 kref_get(&data->kref);
1974 data->rpc_status = 0;
1975 data->cancelled = 0;
1976 data->is_recover = 0;
1978 nfs4_set_sequence_privileged(&o_arg->seq_args);
1979 data->is_recover = 1;
1981 task = rpc_run_task(&task_setup_data);
1983 return PTR_ERR(task);
1984 status = nfs4_wait_for_completion_rpc_task(task);
1986 data->cancelled = 1;
1989 status = data->rpc_status;
1995 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1997 struct inode *dir = data->dir->d_inode;
1998 struct nfs_openres *o_res = &data->o_res;
2001 status = nfs4_run_open_task(data, 1);
2002 if (status != 0 || !data->rpc_done)
2005 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2007 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2008 status = _nfs4_proc_open_confirm(data);
2017 * Additional permission checks in order to distinguish between an
2018 * open for read, and an open for execute. This works around the
2019 * fact that NFSv4 OPEN treats read and execute permissions as being
2021 * Note that in the non-execute case, we want to turn off permission
2022 * checking if we just created a new file (POSIX open() semantics).
2024 static int nfs4_opendata_access(struct rpc_cred *cred,
2025 struct nfs4_opendata *opendata,
2026 struct nfs4_state *state, fmode_t fmode,
2029 struct nfs_access_entry cache;
2032 /* access call failed or for some reason the server doesn't
2033 * support any access modes -- defer access call until later */
2034 if (opendata->o_res.access_supported == 0)
2039 * Use openflags to check for exec, because fmode won't
2040 * always have FMODE_EXEC set when file open for exec.
2042 if (openflags & __FMODE_EXEC) {
2043 /* ONLY check for exec rights */
2045 } else if ((fmode & FMODE_READ) && !opendata->file_created)
2049 cache.jiffies = jiffies;
2050 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2051 nfs_access_add_cache(state->inode, &cache);
2053 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
2056 /* even though OPEN succeeded, access is denied. Close the file */
2057 nfs4_close_state(state, fmode);
2062 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2064 static int _nfs4_proc_open(struct nfs4_opendata *data)
2066 struct inode *dir = data->dir->d_inode;
2067 struct nfs_server *server = NFS_SERVER(dir);
2068 struct nfs_openargs *o_arg = &data->o_arg;
2069 struct nfs_openres *o_res = &data->o_res;
2072 status = nfs4_run_open_task(data, 0);
2073 if (!data->rpc_done)
2076 if (status == -NFS4ERR_BADNAME &&
2077 !(o_arg->open_flags & O_CREAT))
2082 nfs_fattr_map_and_free_names(server, &data->f_attr);
2084 if (o_arg->open_flags & O_CREAT) {
2085 update_changeattr(dir, &o_res->cinfo);
2086 if (o_arg->open_flags & O_EXCL)
2087 data->file_created = 1;
2088 else if (o_res->cinfo.before != o_res->cinfo.after)
2089 data->file_created = 1;
2091 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2092 server->caps &= ~NFS_CAP_POSIX_LOCK;
2093 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2094 status = _nfs4_proc_open_confirm(data);
2098 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
2099 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
2103 static int nfs4_recover_expired_lease(struct nfs_server *server)
2105 return nfs4_client_recover_expired_lease(server->nfs_client);
2110 * reclaim state on the server after a network partition.
2111 * Assumes caller holds the appropriate lock
2113 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2115 struct nfs4_opendata *opendata;
2118 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2119 NFS4_OPEN_CLAIM_FH);
2120 if (IS_ERR(opendata))
2121 return PTR_ERR(opendata);
2122 ret = nfs4_open_recover(opendata, state);
2124 d_drop(ctx->dentry);
2125 nfs4_opendata_put(opendata);
2129 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2131 struct nfs_server *server = NFS_SERVER(state->inode);
2132 struct nfs4_exception exception = { };
2136 err = _nfs4_open_expired(ctx, state);
2137 trace_nfs4_open_expired(ctx, 0, err);
2138 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2143 case -NFS4ERR_GRACE:
2144 case -NFS4ERR_DELAY:
2145 nfs4_handle_exception(server, err, &exception);
2148 } while (exception.retry);
2153 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2155 struct nfs_open_context *ctx;
2158 ctx = nfs4_state_find_open_context(state);
2161 ret = nfs4_do_open_expired(ctx, state);
2162 put_nfs_open_context(ctx);
2166 static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2168 nfs_remove_bad_delegation(state->inode);
2169 write_seqlock(&state->seqlock);
2170 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2171 write_sequnlock(&state->seqlock);
2172 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2175 static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2177 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2178 nfs_finish_clear_delegation_stateid(state);
2181 static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2183 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2184 nfs40_clear_delegation_stateid(state);
2185 return nfs4_open_expired(sp, state);
2188 #if defined(CONFIG_NFS_V4_1)
2189 static void nfs41_check_delegation_stateid(struct nfs4_state *state)
2191 struct nfs_server *server = NFS_SERVER(state->inode);
2192 nfs4_stateid stateid;
2193 struct nfs_delegation *delegation;
2194 struct rpc_cred *cred;
2197 /* Get the delegation credential for use by test/free_stateid */
2199 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2200 if (delegation == NULL) {
2205 nfs4_stateid_copy(&stateid, &delegation->stateid);
2206 cred = get_rpccred(delegation->cred);
2208 status = nfs41_test_stateid(server, &stateid, cred);
2209 trace_nfs4_test_delegation_stateid(state, NULL, status);
2211 if (status != NFS_OK) {
2212 /* Free the stateid unless the server explicitly
2213 * informs us the stateid is unrecognized. */
2214 if (status != -NFS4ERR_BAD_STATEID)
2215 nfs41_free_stateid(server, &stateid, cred);
2216 nfs_finish_clear_delegation_stateid(state);
2223 * nfs41_check_open_stateid - possibly free an open stateid
2225 * @state: NFSv4 state for an inode
2227 * Returns NFS_OK if recovery for this stateid is now finished.
2228 * Otherwise a negative NFS4ERR value is returned.
2230 static int nfs41_check_open_stateid(struct nfs4_state *state)
2232 struct nfs_server *server = NFS_SERVER(state->inode);
2233 nfs4_stateid *stateid = &state->open_stateid;
2234 struct rpc_cred *cred = state->owner->so_cred;
2237 /* If a state reset has been done, test_stateid is unneeded */
2238 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2239 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2240 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2241 return -NFS4ERR_BAD_STATEID;
2243 status = nfs41_test_stateid(server, stateid, cred);
2244 trace_nfs4_test_open_stateid(state, NULL, status);
2245 if (status != NFS_OK) {
2246 /* Free the stateid unless the server explicitly
2247 * informs us the stateid is unrecognized. */
2248 if (status != -NFS4ERR_BAD_STATEID)
2249 nfs41_free_stateid(server, stateid, cred);
2251 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2252 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2253 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2254 clear_bit(NFS_OPEN_STATE, &state->flags);
2259 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2263 nfs41_check_delegation_stateid(state);
2264 status = nfs41_check_open_stateid(state);
2265 if (status != NFS_OK)
2266 status = nfs4_open_expired(sp, state);
2272 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2273 * fields corresponding to attributes that were used to store the verifier.
2274 * Make sure we clobber those fields in the later setattr call
2276 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2278 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2279 !(sattr->ia_valid & ATTR_ATIME_SET))
2280 sattr->ia_valid |= ATTR_ATIME;
2282 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2283 !(sattr->ia_valid & ATTR_MTIME_SET))
2284 sattr->ia_valid |= ATTR_MTIME;
2287 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2290 struct nfs_open_context *ctx)
2292 struct nfs4_state_owner *sp = opendata->owner;
2293 struct nfs_server *server = sp->so_server;
2294 struct dentry *dentry;
2295 struct nfs4_state *state;
2299 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2301 ret = _nfs4_proc_open(opendata);
2305 state = nfs4_opendata_to_nfs4_state(opendata);
2306 ret = PTR_ERR(state);
2309 if (server->caps & NFS_CAP_POSIX_LOCK)
2310 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2312 dentry = opendata->dentry;
2313 if (dentry->d_inode == NULL) {
2314 /* FIXME: Is this d_drop() ever needed? */
2316 dentry = d_add_unique(dentry, igrab(state->inode));
2317 if (dentry == NULL) {
2318 dentry = opendata->dentry;
2319 } else if (dentry != ctx->dentry) {
2321 ctx->dentry = dget(dentry);
2323 nfs_set_verifier(dentry,
2324 nfs_save_change_attribute(opendata->dir->d_inode));
2327 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2332 if (dentry->d_inode == state->inode) {
2333 nfs_inode_attach_open_context(ctx);
2334 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2335 nfs4_schedule_stateid_recovery(server, state);
2342 * Returns a referenced nfs4_state
2344 static int _nfs4_do_open(struct inode *dir,
2345 struct nfs_open_context *ctx,
2347 struct iattr *sattr,
2348 struct nfs4_label *label,
2351 struct nfs4_state_owner *sp;
2352 struct nfs4_state *state = NULL;
2353 struct nfs_server *server = NFS_SERVER(dir);
2354 struct nfs4_opendata *opendata;
2355 struct dentry *dentry = ctx->dentry;
2356 struct rpc_cred *cred = ctx->cred;
2357 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2358 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
2359 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
2360 struct nfs4_label *olabel = NULL;
2363 /* Protect against reboot recovery conflicts */
2365 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2367 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2370 status = nfs4_recover_expired_lease(server);
2372 goto err_put_state_owner;
2373 if (dentry->d_inode != NULL)
2374 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
2376 if (dentry->d_inode)
2377 claim = NFS4_OPEN_CLAIM_FH;
2378 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
2379 label, claim, GFP_KERNEL);
2380 if (opendata == NULL)
2381 goto err_put_state_owner;
2384 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2385 if (IS_ERR(olabel)) {
2386 status = PTR_ERR(olabel);
2387 goto err_opendata_put;
2391 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2392 if (!opendata->f_attr.mdsthreshold) {
2393 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2394 if (!opendata->f_attr.mdsthreshold)
2395 goto err_free_label;
2397 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
2399 if (dentry->d_inode != NULL)
2400 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
2402 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
2404 goto err_free_label;
2407 if ((opendata->o_arg.open_flags & O_EXCL) &&
2408 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
2409 nfs4_exclusive_attrset(opendata, sattr);
2411 nfs_fattr_init(opendata->o_res.f_attr);
2412 status = nfs4_do_setattr(state->inode, cred,
2413 opendata->o_res.f_attr, sattr,
2414 state, label, olabel);
2416 nfs_setattr_update_inode(state->inode, sattr);
2417 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2418 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2421 if (opendata->file_created)
2422 *opened |= FILE_CREATED;
2424 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
2425 *ctx_th = opendata->f_attr.mdsthreshold;
2426 opendata->f_attr.mdsthreshold = NULL;
2429 nfs4_label_free(olabel);
2431 nfs4_opendata_put(opendata);
2432 nfs4_put_state_owner(sp);
2435 nfs4_label_free(olabel);
2437 nfs4_opendata_put(opendata);
2438 err_put_state_owner:
2439 nfs4_put_state_owner(sp);
2445 static struct nfs4_state *nfs4_do_open(struct inode *dir,
2446 struct nfs_open_context *ctx,
2448 struct iattr *sattr,
2449 struct nfs4_label *label,
2452 struct nfs_server *server = NFS_SERVER(dir);
2453 struct nfs4_exception exception = { };
2454 struct nfs4_state *res;
2458 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
2460 trace_nfs4_open_file(ctx, flags, status);
2463 /* NOTE: BAD_SEQID means the server and client disagree about the
2464 * book-keeping w.r.t. state-changing operations
2465 * (OPEN/CLOSE/LOCK/LOCKU...)
2466 * It is actually a sign of a bug on the client or on the server.
2468 * If we receive a BAD_SEQID error in the particular case of
2469 * doing an OPEN, we assume that nfs_increment_open_seqid() will
2470 * have unhashed the old state_owner for us, and that we can
2471 * therefore safely retry using a new one. We should still warn
2472 * the user though...
2474 if (status == -NFS4ERR_BAD_SEQID) {
2475 pr_warn_ratelimited("NFS: v4 server %s "
2476 " returned a bad sequence-id error!\n",
2477 NFS_SERVER(dir)->nfs_client->cl_hostname);
2478 exception.retry = 1;
2482 * BAD_STATEID on OPEN means that the server cancelled our
2483 * state before it received the OPEN_CONFIRM.
2484 * Recover by retrying the request as per the discussion
2485 * on Page 181 of RFC3530.
2487 if (status == -NFS4ERR_BAD_STATEID) {
2488 exception.retry = 1;
2491 if (status == -EAGAIN) {
2492 /* We must have found a delegation */
2493 exception.retry = 1;
2496 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2498 res = ERR_PTR(nfs4_handle_exception(server,
2499 status, &exception));
2500 } while (exception.retry);
2504 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2505 struct nfs_fattr *fattr, struct iattr *sattr,
2506 struct nfs4_state *state, struct nfs4_label *ilabel,
2507 struct nfs4_label *olabel)
2509 struct nfs_server *server = NFS_SERVER(inode);
2510 struct nfs_setattrargs arg = {
2511 .fh = NFS_FH(inode),
2514 .bitmask = server->attr_bitmask,
2517 struct nfs_setattrres res = {
2522 struct rpc_message msg = {
2523 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2528 unsigned long timestamp = jiffies;
2533 arg.bitmask = nfs4_bitmask(server, ilabel);
2535 arg.bitmask = nfs4_bitmask(server, olabel);
2537 nfs_fattr_init(fattr);
2539 /* Servers should only apply open mode checks for file size changes */
2540 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2541 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2543 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2544 /* Use that stateid */
2545 } else if (truncate && state != NULL) {
2546 struct nfs_lockowner lockowner = {
2547 .l_owner = current->files,
2548 .l_pid = current->tgid,
2550 if (!nfs4_valid_open_stateid(state))
2552 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2553 &lockowner) == -EIO)
2556 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
2558 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2559 if (status == 0 && state != NULL)
2560 renew_lease(server, timestamp);
2564 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2565 struct nfs_fattr *fattr, struct iattr *sattr,
2566 struct nfs4_state *state, struct nfs4_label *ilabel,
2567 struct nfs4_label *olabel)
2569 struct nfs_server *server = NFS_SERVER(inode);
2570 struct nfs4_exception exception = {
2576 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
2577 trace_nfs4_setattr(inode, err);
2579 case -NFS4ERR_OPENMODE:
2580 if (!(sattr->ia_valid & ATTR_SIZE)) {
2581 pr_warn_once("NFSv4: server %s is incorrectly "
2582 "applying open mode checks to "
2583 "a SETATTR that is not "
2584 "changing file size.\n",
2585 server->nfs_client->cl_hostname);
2587 if (state && !(state->state & FMODE_WRITE)) {
2589 if (sattr->ia_valid & ATTR_OPEN)
2594 err = nfs4_handle_exception(server, err, &exception);
2595 } while (exception.retry);
2600 struct nfs4_closedata {
2601 struct inode *inode;
2602 struct nfs4_state *state;
2603 struct nfs_closeargs arg;
2604 struct nfs_closeres res;
2605 struct nfs_fattr fattr;
2606 unsigned long timestamp;
2611 static void nfs4_free_closedata(void *data)
2613 struct nfs4_closedata *calldata = data;
2614 struct nfs4_state_owner *sp = calldata->state->owner;
2615 struct super_block *sb = calldata->state->inode->i_sb;
2618 pnfs_roc_release(calldata->state->inode);
2619 nfs4_put_open_state(calldata->state);
2620 nfs_free_seqid(calldata->arg.seqid);
2621 nfs4_put_state_owner(sp);
2622 nfs_sb_deactive(sb);
2626 static void nfs4_close_done(struct rpc_task *task, void *data)
2628 struct nfs4_closedata *calldata = data;
2629 struct nfs4_state *state = calldata->state;
2630 struct nfs_server *server = NFS_SERVER(calldata->inode);
2631 nfs4_stateid *res_stateid = NULL;
2633 dprintk("%s: begin!\n", __func__);
2634 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2636 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
2637 /* hmm. we are done with the inode, and in the process of freeing
2638 * the state_owner. we keep this around to process errors
2640 switch (task->tk_status) {
2642 res_stateid = &calldata->res.stateid;
2643 if (calldata->arg.fmode == 0 && calldata->roc)
2644 pnfs_roc_set_barrier(state->inode,
2645 calldata->roc_barrier);
2646 renew_lease(server, calldata->timestamp);
2648 case -NFS4ERR_ADMIN_REVOKED:
2649 case -NFS4ERR_STALE_STATEID:
2650 case -NFS4ERR_OLD_STATEID:
2651 case -NFS4ERR_BAD_STATEID:
2652 case -NFS4ERR_EXPIRED:
2653 if (!nfs4_stateid_match(&calldata->arg.stateid,
2655 rpc_restart_call_prepare(task);
2658 if (calldata->arg.fmode == 0)
2661 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
2662 rpc_restart_call_prepare(task);
2666 nfs_clear_open_stateid(state, res_stateid, calldata->arg.fmode);
2668 nfs_release_seqid(calldata->arg.seqid);
2669 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2670 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2673 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2675 struct nfs4_closedata *calldata = data;
2676 struct nfs4_state *state = calldata->state;
2677 struct inode *inode = calldata->inode;
2678 bool is_rdonly, is_wronly, is_rdwr;
2681 dprintk("%s: begin!\n", __func__);
2682 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2685 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2686 spin_lock(&state->owner->so_lock);
2687 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2688 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2689 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
2690 nfs4_stateid_copy(&calldata->arg.stateid, &state->stateid);
2691 /* Calculate the change in open mode */
2692 calldata->arg.fmode = 0;
2693 if (state->n_rdwr == 0) {
2694 if (state->n_rdonly == 0)
2695 call_close |= is_rdonly;
2697 calldata->arg.fmode |= FMODE_READ;
2698 if (state->n_wronly == 0)
2699 call_close |= is_wronly;
2701 calldata->arg.fmode |= FMODE_WRITE;
2703 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2705 if (calldata->arg.fmode == 0)
2706 call_close |= is_rdwr;
2708 if (!nfs4_valid_open_stateid(state))
2710 spin_unlock(&state->owner->so_lock);
2713 /* Note: exit _without_ calling nfs4_close_done */
2717 if (calldata->arg.fmode == 0) {
2718 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2719 if (calldata->roc &&
2720 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2721 nfs_release_seqid(calldata->arg.seqid);
2725 calldata->arg.share_access =
2726 nfs4_map_atomic_open_share(NFS_SERVER(inode),
2727 calldata->arg.fmode, 0);
2729 nfs_fattr_init(calldata->res.fattr);
2730 calldata->timestamp = jiffies;
2731 if (nfs4_setup_sequence(NFS_SERVER(inode),
2732 &calldata->arg.seq_args,
2733 &calldata->res.seq_res,
2735 nfs_release_seqid(calldata->arg.seqid);
2736 dprintk("%s: done!\n", __func__);
2739 task->tk_action = NULL;
2741 nfs4_sequence_done(task, &calldata->res.seq_res);
2744 static const struct rpc_call_ops nfs4_close_ops = {
2745 .rpc_call_prepare = nfs4_close_prepare,
2746 .rpc_call_done = nfs4_close_done,
2747 .rpc_release = nfs4_free_closedata,
2750 static bool nfs4_roc(struct inode *inode)
2752 if (!nfs_have_layout(inode))
2754 return pnfs_roc(inode);
2758 * It is possible for data to be read/written from a mem-mapped file
2759 * after the sys_close call (which hits the vfs layer as a flush).
2760 * This means that we can't safely call nfsv4 close on a file until
2761 * the inode is cleared. This in turn means that we are not good
2762 * NFSv4 citizens - we do not indicate to the server to update the file's
2763 * share state even when we are done with one of the three share
2764 * stateid's in the inode.
2766 * NOTE: Caller must be holding the sp->so_owner semaphore!
2768 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
2770 struct nfs_server *server = NFS_SERVER(state->inode);
2771 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
2772 struct nfs4_closedata *calldata;
2773 struct nfs4_state_owner *sp = state->owner;
2774 struct rpc_task *task;
2775 struct rpc_message msg = {
2776 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2777 .rpc_cred = state->owner->so_cred,
2779 struct rpc_task_setup task_setup_data = {
2780 .rpc_client = server->client,
2781 .rpc_message = &msg,
2782 .callback_ops = &nfs4_close_ops,
2783 .workqueue = nfsiod_workqueue,
2784 .flags = RPC_TASK_ASYNC,
2786 int status = -ENOMEM;
2788 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2789 &task_setup_data.rpc_client, &msg);
2791 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2792 if (calldata == NULL)
2794 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2795 calldata->inode = state->inode;
2796 calldata->state = state;
2797 calldata->arg.fh = NFS_FH(state->inode);
2798 /* Serialization for the sequence id */
2799 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
2800 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
2801 if (IS_ERR(calldata->arg.seqid))
2802 goto out_free_calldata;
2803 calldata->arg.fmode = 0;
2804 calldata->arg.bitmask = server->cache_consistency_bitmask;
2805 calldata->res.fattr = &calldata->fattr;
2806 calldata->res.seqid = calldata->arg.seqid;
2807 calldata->res.server = server;
2808 calldata->roc = nfs4_roc(state->inode);
2809 nfs_sb_active(calldata->inode->i_sb);
2811 msg.rpc_argp = &calldata->arg;
2812 msg.rpc_resp = &calldata->res;
2813 task_setup_data.callback_data = calldata;
2814 task = rpc_run_task(&task_setup_data);
2816 return PTR_ERR(task);
2819 status = rpc_wait_for_completion_task(task);
2825 nfs4_put_open_state(state);
2826 nfs4_put_state_owner(sp);
2830 static struct inode *
2831 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2832 int open_flags, struct iattr *attr, int *opened)
2834 struct nfs4_state *state;
2835 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2837 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
2839 /* Protect against concurrent sillydeletes */
2840 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
2842 nfs4_label_release_security(label);
2845 return ERR_CAST(state);
2846 return state->inode;
2849 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2851 if (ctx->state == NULL)
2854 nfs4_close_sync(ctx->state, ctx->mode);
2856 nfs4_close_state(ctx->state, ctx->mode);
2859 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2860 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
2861 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
2863 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2865 struct nfs4_server_caps_arg args = {
2868 struct nfs4_server_caps_res res = {};
2869 struct rpc_message msg = {
2870 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2876 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2878 /* Sanity check the server answers */
2879 switch (server->nfs_client->cl_minorversion) {
2881 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2882 res.attr_bitmask[2] = 0;
2885 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2888 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2890 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2891 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2892 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2893 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2894 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2895 NFS_CAP_CTIME|NFS_CAP_MTIME|
2896 NFS_CAP_SECURITY_LABEL);
2897 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2898 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2899 server->caps |= NFS_CAP_ACLS;
2900 if (res.has_links != 0)
2901 server->caps |= NFS_CAP_HARDLINKS;
2902 if (res.has_symlinks != 0)
2903 server->caps |= NFS_CAP_SYMLINKS;
2904 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2905 server->caps |= NFS_CAP_FILEID;
2906 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2907 server->caps |= NFS_CAP_MODE;
2908 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2909 server->caps |= NFS_CAP_NLINK;
2910 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2911 server->caps |= NFS_CAP_OWNER;
2912 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2913 server->caps |= NFS_CAP_OWNER_GROUP;
2914 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2915 server->caps |= NFS_CAP_ATIME;
2916 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2917 server->caps |= NFS_CAP_CTIME;
2918 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2919 server->caps |= NFS_CAP_MTIME;
2920 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
2921 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2922 server->caps |= NFS_CAP_SECURITY_LABEL;
2924 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2925 sizeof(server->attr_bitmask));
2926 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2928 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2929 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2930 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2931 server->cache_consistency_bitmask[2] = 0;
2932 server->acl_bitmask = res.acl_bitmask;
2933 server->fh_expire_type = res.fh_expire_type;
2939 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2941 struct nfs4_exception exception = { };
2944 err = nfs4_handle_exception(server,
2945 _nfs4_server_capabilities(server, fhandle),
2947 } while (exception.retry);
2951 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2952 struct nfs_fsinfo *info)
2955 struct nfs4_lookup_root_arg args = {
2958 struct nfs4_lookup_res res = {
2960 .fattr = info->fattr,
2963 struct rpc_message msg = {
2964 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2969 bitmask[0] = nfs4_fattr_bitmap[0];
2970 bitmask[1] = nfs4_fattr_bitmap[1];
2972 * Process the label in the upcoming getfattr
2974 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2976 nfs_fattr_init(info->fattr);
2977 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2980 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2981 struct nfs_fsinfo *info)
2983 struct nfs4_exception exception = { };
2986 err = _nfs4_lookup_root(server, fhandle, info);
2987 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
2990 case -NFS4ERR_WRONGSEC:
2993 err = nfs4_handle_exception(server, err, &exception);
2995 } while (exception.retry);
3000 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3001 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3003 struct rpc_auth_create_args auth_args = {
3004 .pseudoflavor = flavor,
3006 struct rpc_auth *auth;
3009 auth = rpcauth_create(&auth_args, server->client);
3014 ret = nfs4_lookup_root(server, fhandle, info);
3020 * Retry pseudoroot lookup with various security flavors. We do this when:
3022 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3023 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3025 * Returns zero on success, or a negative NFS4ERR value, or a
3026 * negative errno value.
3028 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3029 struct nfs_fsinfo *info)
3031 /* Per 3530bis 15.33.5 */
3032 static const rpc_authflavor_t flav_array[] = {
3036 RPC_AUTH_UNIX, /* courtesy */
3039 int status = -EPERM;
3042 if (server->auth_info.flavor_len > 0) {
3043 /* try each flavor specified by user */
3044 for (i = 0; i < server->auth_info.flavor_len; i++) {
3045 status = nfs4_lookup_root_sec(server, fhandle, info,
3046 server->auth_info.flavors[i]);
3047 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3052 /* no flavors specified by user, try default list */
3053 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3054 status = nfs4_lookup_root_sec(server, fhandle, info,
3056 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3063 * -EACCESS could mean that the user doesn't have correct permissions
3064 * to access the mount. It could also mean that we tried to mount
3065 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3066 * existing mount programs don't handle -EACCES very well so it should
3067 * be mapped to -EPERM instead.
3069 if (status == -EACCES)
3074 static int nfs4_do_find_root_sec(struct nfs_server *server,
3075 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3077 int mv = server->nfs_client->cl_minorversion;
3078 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3082 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3083 * @server: initialized nfs_server handle
3084 * @fhandle: we fill in the pseudo-fs root file handle
3085 * @info: we fill in an FSINFO struct
3086 * @auth_probe: probe the auth flavours
3088 * Returns zero on success, or a negative errno.
3090 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
3091 struct nfs_fsinfo *info,
3096 switch (auth_probe) {
3098 status = nfs4_lookup_root(server, fhandle, info);
3099 if (status != -NFS4ERR_WRONGSEC)
3102 status = nfs4_do_find_root_sec(server, fhandle, info);
3106 status = nfs4_server_capabilities(server, fhandle);
3108 status = nfs4_do_fsinfo(server, fhandle, info);
3110 return nfs4_map_errors(status);
3113 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3114 struct nfs_fsinfo *info)
3117 struct nfs_fattr *fattr = info->fattr;
3118 struct nfs4_label *label = NULL;
3120 error = nfs4_server_capabilities(server, mntfh);
3122 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3126 label = nfs4_label_alloc(server, GFP_KERNEL);
3128 return PTR_ERR(label);
3130 error = nfs4_proc_getattr(server, mntfh, fattr, label);
3132 dprintk("nfs4_get_root: getattr error = %d\n", -error);
3133 goto err_free_label;
3136 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3137 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3138 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3141 nfs4_label_free(label);
3147 * Get locations and (maybe) other attributes of a referral.
3148 * Note that we'll actually follow the referral later when
3149 * we detect fsid mismatch in inode revalidation
3151 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3152 const struct qstr *name, struct nfs_fattr *fattr,
3153 struct nfs_fh *fhandle)
3155 int status = -ENOMEM;
3156 struct page *page = NULL;
3157 struct nfs4_fs_locations *locations = NULL;
3159 page = alloc_page(GFP_KERNEL);
3162 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3163 if (locations == NULL)
3166 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
3171 * If the fsid didn't change, this is a migration event, not a
3172 * referral. Cause us to drop into the exception handler, which
3173 * will kick off migration recovery.
3175 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3176 dprintk("%s: server did not return a different fsid for"
3177 " a referral at %s\n", __func__, name->name);
3178 status = -NFS4ERR_MOVED;
3181 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3182 nfs_fixup_referral_attributes(&locations->fattr);
3184 /* replace the lookup nfs_fattr with the locations nfs_fattr */
3185 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
3186 memset(fhandle, 0, sizeof(struct nfs_fh));
3194 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3195 struct nfs_fattr *fattr, struct nfs4_label *label)
3197 struct nfs4_getattr_arg args = {
3199 .bitmask = server->attr_bitmask,
3201 struct nfs4_getattr_res res = {
3206 struct rpc_message msg = {
3207 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3212 args.bitmask = nfs4_bitmask(server, label);
3214 nfs_fattr_init(fattr);
3215 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3218 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3219 struct nfs_fattr *fattr, struct nfs4_label *label)
3221 struct nfs4_exception exception = { };
3224 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3225 trace_nfs4_getattr(server, fhandle, fattr, err);
3226 err = nfs4_handle_exception(server, err,
3228 } while (exception.retry);
3233 * The file is not closed if it is opened due to the a request to change
3234 * the size of the file. The open call will not be needed once the
3235 * VFS layer lookup-intents are implemented.
3237 * Close is called when the inode is destroyed.
3238 * If we haven't opened the file for O_WRONLY, we
3239 * need to in the size_change case to obtain a stateid.
3242 * Because OPEN is always done by name in nfsv4, it is
3243 * possible that we opened a different file by the same
3244 * name. We can recognize this race condition, but we
3245 * can't do anything about it besides returning an error.
3247 * This will be fixed with VFS changes (lookup-intent).
3250 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3251 struct iattr *sattr)
3253 struct inode *inode = dentry->d_inode;
3254 struct rpc_cred *cred = NULL;
3255 struct nfs4_state *state = NULL;
3256 struct nfs4_label *label = NULL;
3259 if (pnfs_ld_layoutret_on_setattr(inode) &&
3260 sattr->ia_valid & ATTR_SIZE &&
3261 sattr->ia_size < i_size_read(inode))
3262 pnfs_commit_and_return_layout(inode);
3264 nfs_fattr_init(fattr);
3266 /* Deal with open(O_TRUNC) */
3267 if (sattr->ia_valid & ATTR_OPEN)
3268 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
3270 /* Optimization: if the end result is no change, don't RPC */
3271 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
3274 /* Search for an existing open(O_WRITE) file */
3275 if (sattr->ia_valid & ATTR_FILE) {
3276 struct nfs_open_context *ctx;
3278 ctx = nfs_file_open_context(sattr->ia_file);
3285 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3287 return PTR_ERR(label);
3289 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
3291 nfs_setattr_update_inode(inode, sattr);
3292 nfs_setsecurity(inode, fattr, label);
3294 nfs4_label_free(label);
3298 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3299 const struct qstr *name, struct nfs_fh *fhandle,
3300 struct nfs_fattr *fattr, struct nfs4_label *label)
3302 struct nfs_server *server = NFS_SERVER(dir);
3304 struct nfs4_lookup_arg args = {
3305 .bitmask = server->attr_bitmask,
3306 .dir_fh = NFS_FH(dir),
3309 struct nfs4_lookup_res res = {
3315 struct rpc_message msg = {
3316 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3321 args.bitmask = nfs4_bitmask(server, label);
3323 nfs_fattr_init(fattr);
3325 dprintk("NFS call lookup %s\n", name->name);
3326 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
3327 dprintk("NFS reply lookup: %d\n", status);
3331 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
3333 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
3334 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
3335 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3339 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3340 struct qstr *name, struct nfs_fh *fhandle,
3341 struct nfs_fattr *fattr, struct nfs4_label *label)
3343 struct nfs4_exception exception = { };
3344 struct rpc_clnt *client = *clnt;
3347 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
3348 trace_nfs4_lookup(dir, name, err);
3350 case -NFS4ERR_BADNAME:
3353 case -NFS4ERR_MOVED:
3354 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
3356 case -NFS4ERR_WRONGSEC:
3358 if (client != *clnt)
3360 client = nfs4_negotiate_security(client, dir, name);
3362 return PTR_ERR(client);
3364 exception.retry = 1;
3367 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3369 } while (exception.retry);
3374 else if (client != *clnt)
3375 rpc_shutdown_client(client);
3380 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
3381 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3382 struct nfs4_label *label)
3385 struct rpc_clnt *client = NFS_CLIENT(dir);
3387 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
3388 if (client != NFS_CLIENT(dir)) {
3389 rpc_shutdown_client(client);
3390 nfs_fixup_secinfo_attributes(fattr);
3396 nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3397 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3399 struct rpc_clnt *client = NFS_CLIENT(dir);
3402 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
3404 return ERR_PTR(status);
3405 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
3408 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3410 struct nfs_server *server = NFS_SERVER(inode);
3411 struct nfs4_accessargs args = {
3412 .fh = NFS_FH(inode),
3413 .bitmask = server->cache_consistency_bitmask,
3415 struct nfs4_accessres res = {
3418 struct rpc_message msg = {
3419 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3422 .rpc_cred = entry->cred,
3424 int mode = entry->mask;
3428 * Determine which access bits we want to ask for...
3430 if (mode & MAY_READ)
3431 args.access |= NFS4_ACCESS_READ;
3432 if (S_ISDIR(inode->i_mode)) {
3433 if (mode & MAY_WRITE)
3434 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3435 if (mode & MAY_EXEC)
3436 args.access |= NFS4_ACCESS_LOOKUP;
3438 if (mode & MAY_WRITE)
3439 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3440 if (mode & MAY_EXEC)
3441 args.access |= NFS4_ACCESS_EXECUTE;
3444 res.fattr = nfs_alloc_fattr();
3445 if (res.fattr == NULL)
3448 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3450 nfs_access_set_mask(entry, res.access);
3451 nfs_refresh_inode(inode, res.fattr);
3453 nfs_free_fattr(res.fattr);
3457 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3459 struct nfs4_exception exception = { };
3462 err = _nfs4_proc_access(inode, entry);
3463 trace_nfs4_access(inode, err);
3464 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3466 } while (exception.retry);
3471 * TODO: For the time being, we don't try to get any attributes
3472 * along with any of the zero-copy operations READ, READDIR,
3475 * In the case of the first three, we want to put the GETATTR
3476 * after the read-type operation -- this is because it is hard
3477 * to predict the length of a GETATTR response in v4, and thus
3478 * align the READ data correctly. This means that the GETATTR
3479 * may end up partially falling into the page cache, and we should
3480 * shift it into the 'tail' of the xdr_buf before processing.
3481 * To do this efficiently, we need to know the total length
3482 * of data received, which doesn't seem to be available outside
3485 * In the case of WRITE, we also want to put the GETATTR after
3486 * the operation -- in this case because we want to make sure
3487 * we get the post-operation mtime and size.
3489 * Both of these changes to the XDR layer would in fact be quite
3490 * minor, but I decided to leave them for a subsequent patch.
3492 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3493 unsigned int pgbase, unsigned int pglen)
3495 struct nfs4_readlink args = {
3496 .fh = NFS_FH(inode),
3501 struct nfs4_readlink_res res;
3502 struct rpc_message msg = {
3503 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3508 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
3511 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3512 unsigned int pgbase, unsigned int pglen)
3514 struct nfs4_exception exception = { };
3517 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3518 trace_nfs4_readlink(inode, err);
3519 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3521 } while (exception.retry);
3526 * This is just for mknod. open(O_CREAT) will always do ->open_context().
3529 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
3532 struct nfs4_label l, *ilabel = NULL;
3533 struct nfs_open_context *ctx;
3534 struct nfs4_state *state;
3538 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3540 return PTR_ERR(ctx);
3542 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3544 sattr->ia_mode &= ~current_umask();
3545 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
3546 if (IS_ERR(state)) {
3547 status = PTR_ERR(state);
3551 nfs4_label_release_security(ilabel);
3552 put_nfs_open_context(ctx);
3556 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3558 struct nfs_server *server = NFS_SERVER(dir);
3559 struct nfs_removeargs args = {
3563 struct nfs_removeres res = {
3566 struct rpc_message msg = {
3567 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3573 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
3575 update_changeattr(dir, &res.cinfo);
3579 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3581 struct nfs4_exception exception = { };
3584 err = _nfs4_proc_remove(dir, name);
3585 trace_nfs4_remove(dir, name, err);
3586 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3588 } while (exception.retry);
3592 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
3594 struct nfs_server *server = NFS_SERVER(dir);
3595 struct nfs_removeargs *args = msg->rpc_argp;
3596 struct nfs_removeres *res = msg->rpc_resp;
3598 res->server = server;
3599 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
3600 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
3602 nfs_fattr_init(res->dir_attr);
3605 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3607 nfs4_setup_sequence(NFS_SERVER(data->dir),
3608 &data->args.seq_args,
3613 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
3615 struct nfs_unlinkdata *data = task->tk_calldata;
3616 struct nfs_removeres *res = &data->res;
3618 if (!nfs4_sequence_done(task, &res->seq_res))
3620 if (nfs4_async_handle_error(task, res->server, NULL,
3621 &data->timeout) == -EAGAIN)
3623 update_changeattr(dir, &res->cinfo);
3627 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3629 struct nfs_server *server = NFS_SERVER(dir);
3630 struct nfs_renameargs *arg = msg->rpc_argp;
3631 struct nfs_renameres *res = msg->rpc_resp;
3633 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
3634 res->server = server;
3635 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
3638 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3640 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3641 &data->args.seq_args,
3646 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3647 struct inode *new_dir)
3649 struct nfs_renamedata *data = task->tk_calldata;
3650 struct nfs_renameres *res = &data->res;
3652 if (!nfs4_sequence_done(task, &res->seq_res))
3654 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
3657 update_changeattr(old_dir, &res->old_cinfo);
3658 update_changeattr(new_dir, &res->new_cinfo);
3662 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3664 struct nfs_server *server = NFS_SERVER(inode);
3665 struct nfs4_link_arg arg = {
3666 .fh = NFS_FH(inode),
3667 .dir_fh = NFS_FH(dir),
3669 .bitmask = server->attr_bitmask,
3671 struct nfs4_link_res res = {
3675 struct rpc_message msg = {
3676 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3680 int status = -ENOMEM;
3682 res.fattr = nfs_alloc_fattr();
3683 if (res.fattr == NULL)
3686 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3687 if (IS_ERR(res.label)) {
3688 status = PTR_ERR(res.label);
3691 arg.bitmask = nfs4_bitmask(server, res.label);
3693 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3695 update_changeattr(dir, &res.cinfo);
3696 status = nfs_post_op_update_inode(inode, res.fattr);
3698 nfs_setsecurity(inode, res.fattr, res.label);
3702 nfs4_label_free(res.label);
3705 nfs_free_fattr(res.fattr);
3709 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3711 struct nfs4_exception exception = { };
3714 err = nfs4_handle_exception(NFS_SERVER(inode),
3715 _nfs4_proc_link(inode, dir, name),
3717 } while (exception.retry);
3721 struct nfs4_createdata {
3722 struct rpc_message msg;
3723 struct nfs4_create_arg arg;
3724 struct nfs4_create_res res;
3726 struct nfs_fattr fattr;
3727 struct nfs4_label *label;
3730 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3731 struct qstr *name, struct iattr *sattr, u32 ftype)
3733 struct nfs4_createdata *data;
3735 data = kzalloc(sizeof(*data), GFP_KERNEL);
3737 struct nfs_server *server = NFS_SERVER(dir);
3739 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3740 if (IS_ERR(data->label))
3743 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3744 data->msg.rpc_argp = &data->arg;
3745 data->msg.rpc_resp = &data->res;
3746 data->arg.dir_fh = NFS_FH(dir);
3747 data->arg.server = server;
3748 data->arg.name = name;
3749 data->arg.attrs = sattr;
3750 data->arg.ftype = ftype;
3751 data->arg.bitmask = nfs4_bitmask(server, data->label);
3752 data->res.server = server;
3753 data->res.fh = &data->fh;
3754 data->res.fattr = &data->fattr;
3755 data->res.label = data->label;
3756 nfs_fattr_init(data->res.fattr);
3764 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3766 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3767 &data->arg.seq_args, &data->res.seq_res, 1);
3769 update_changeattr(dir, &data->res.dir_cinfo);
3770 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
3775 static void nfs4_free_createdata(struct nfs4_createdata *data)
3777 nfs4_label_free(data->label);
3781 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3782 struct page *page, unsigned int len, struct iattr *sattr,
3783 struct nfs4_label *label)
3785 struct nfs4_createdata *data;
3786 int status = -ENAMETOOLONG;
3788 if (len > NFS4_MAXPATHLEN)
3792 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3796 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3797 data->arg.u.symlink.pages = &page;
3798 data->arg.u.symlink.len = len;
3799 data->arg.label = label;
3801 status = nfs4_do_create(dir, dentry, data);
3803 nfs4_free_createdata(data);
3808 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3809 struct page *page, unsigned int len, struct iattr *sattr)
3811 struct nfs4_exception exception = { };
3812 struct nfs4_label l, *label = NULL;
3815 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3818 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3819 trace_nfs4_symlink(dir, &dentry->d_name, err);
3820 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3822 } while (exception.retry);
3824 nfs4_label_release_security(label);
3828 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3829 struct iattr *sattr, struct nfs4_label *label)
3831 struct nfs4_createdata *data;
3832 int status = -ENOMEM;
3834 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3838 data->arg.label = label;
3839 status = nfs4_do_create(dir, dentry, data);
3841 nfs4_free_createdata(data);
3846 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3847 struct iattr *sattr)
3849 struct nfs4_exception exception = { };
3850 struct nfs4_label l, *label = NULL;
3853 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3855 sattr->ia_mode &= ~current_umask();
3857 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3858 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3859 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3861 } while (exception.retry);
3862 nfs4_label_release_security(label);
3867 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3868 u64 cookie, struct page **pages, unsigned int count, int plus)
3870 struct inode *dir = dentry->d_inode;
3871 struct nfs4_readdir_arg args = {
3876 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3879 struct nfs4_readdir_res res;
3880 struct rpc_message msg = {
3881 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3888 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3890 (unsigned long long)cookie);
3891 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
3892 res.pgbase = args.pgbase;
3893 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3895 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
3896 status += args.pgbase;
3899 nfs_invalidate_atime(dir);
3901 dprintk("%s: returns %d\n", __func__, status);
3905 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3906 u64 cookie, struct page **pages, unsigned int count, int plus)
3908 struct nfs4_exception exception = { };
3911 err = _nfs4_proc_readdir(dentry, cred, cookie,
3912 pages, count, plus);
3913 trace_nfs4_readdir(dentry->d_inode, err);
3914 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
3916 } while (exception.retry);
3920 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3921 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
3923 struct nfs4_createdata *data;
3924 int mode = sattr->ia_mode;
3925 int status = -ENOMEM;
3927 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3932 data->arg.ftype = NF4FIFO;
3933 else if (S_ISBLK(mode)) {
3934 data->arg.ftype = NF4BLK;
3935 data->arg.u.device.specdata1 = MAJOR(rdev);
3936 data->arg.u.device.specdata2 = MINOR(rdev);
3938 else if (S_ISCHR(mode)) {
3939 data->arg.ftype = NF4CHR;
3940 data->arg.u.device.specdata1 = MAJOR(rdev);
3941 data->arg.u.device.specdata2 = MINOR(rdev);
3942 } else if (!S_ISSOCK(mode)) {
3947 data->arg.label = label;
3948 status = nfs4_do_create(dir, dentry, data);
3950 nfs4_free_createdata(data);
3955 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3956 struct iattr *sattr, dev_t rdev)
3958 struct nfs4_exception exception = { };
3959 struct nfs4_label l, *label = NULL;
3962 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3964 sattr->ia_mode &= ~current_umask();
3966 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3967 trace_nfs4_mknod(dir, &dentry->d_name, err);
3968 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3970 } while (exception.retry);
3972 nfs4_label_release_security(label);
3977 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3978 struct nfs_fsstat *fsstat)
3980 struct nfs4_statfs_arg args = {
3982 .bitmask = server->attr_bitmask,
3984 struct nfs4_statfs_res res = {
3987 struct rpc_message msg = {
3988 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3993 nfs_fattr_init(fsstat->fattr);
3994 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3997 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3999 struct nfs4_exception exception = { };
4002 err = nfs4_handle_exception(server,
4003 _nfs4_proc_statfs(server, fhandle, fsstat),
4005 } while (exception.retry);
4009 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4010 struct nfs_fsinfo *fsinfo)
4012 struct nfs4_fsinfo_arg args = {
4014 .bitmask = server->attr_bitmask,
4016 struct nfs4_fsinfo_res res = {
4019 struct rpc_message msg = {
4020 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4025 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4028 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4030 struct nfs4_exception exception = { };
4031 unsigned long now = jiffies;
4035 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
4036 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
4038 struct nfs_client *clp = server->nfs_client;
4040 spin_lock(&clp->cl_lock);
4041 clp->cl_lease_time = fsinfo->lease_time * HZ;
4042 clp->cl_last_renewal = now;
4043 spin_unlock(&clp->cl_lock);
4046 err = nfs4_handle_exception(server, err, &exception);
4047 } while (exception.retry);
4051 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4055 nfs_fattr_init(fsinfo->fattr);
4056 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
4058 /* block layout checks this! */
4059 server->pnfs_blksize = fsinfo->blksize;
4060 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
4066 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4067 struct nfs_pathconf *pathconf)
4069 struct nfs4_pathconf_arg args = {
4071 .bitmask = server->attr_bitmask,
4073 struct nfs4_pathconf_res res = {
4074 .pathconf = pathconf,
4076 struct rpc_message msg = {
4077 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4082 /* None of the pathconf attributes are mandatory to implement */
4083 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4084 memset(pathconf, 0, sizeof(*pathconf));
4088 nfs_fattr_init(pathconf->fattr);
4089 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4092 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4093 struct nfs_pathconf *pathconf)
4095 struct nfs4_exception exception = { };
4099 err = nfs4_handle_exception(server,
4100 _nfs4_proc_pathconf(server, fhandle, pathconf),
4102 } while (exception.retry);
4106 int nfs4_set_rw_stateid(nfs4_stateid *stateid,
4107 const struct nfs_open_context *ctx,
4108 const struct nfs_lock_context *l_ctx,
4111 const struct nfs_lockowner *lockowner = NULL;
4114 lockowner = &l_ctx->lockowner;
4115 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
4117 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4119 static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4120 const struct nfs_open_context *ctx,
4121 const struct nfs_lock_context *l_ctx,
4124 nfs4_stateid current_stateid;
4126 /* If the current stateid represents a lost lock, then exit */
4127 if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode) == -EIO)
4129 return nfs4_stateid_match(stateid, ¤t_stateid);
4132 static bool nfs4_error_stateid_expired(int err)
4135 case -NFS4ERR_DELEG_REVOKED:
4136 case -NFS4ERR_ADMIN_REVOKED:
4137 case -NFS4ERR_BAD_STATEID:
4138 case -NFS4ERR_STALE_STATEID:
4139 case -NFS4ERR_OLD_STATEID:
4140 case -NFS4ERR_OPENMODE:
4141 case -NFS4ERR_EXPIRED:
4147 void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
4149 nfs_invalidate_atime(hdr->inode);
4152 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
4154 struct nfs_server *server = NFS_SERVER(hdr->inode);
4156 trace_nfs4_read(hdr, task->tk_status);
4157 if (nfs4_async_handle_error(task, server,
4158 hdr->args.context->state,
4160 rpc_restart_call_prepare(task);
4164 __nfs4_read_done_cb(hdr);
4165 if (task->tk_status > 0)
4166 renew_lease(server, hdr->timestamp);
4170 static bool nfs4_read_stateid_changed(struct rpc_task *task,
4171 struct nfs_pgio_args *args)
4174 if (!nfs4_error_stateid_expired(task->tk_status) ||
4175 nfs4_stateid_is_current(&args->stateid,
4180 rpc_restart_call_prepare(task);
4184 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4187 dprintk("--> %s\n", __func__);
4189 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4191 if (nfs4_read_stateid_changed(task, &hdr->args))
4193 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4194 nfs4_read_done_cb(task, hdr);
4197 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4198 struct rpc_message *msg)
4200 hdr->timestamp = jiffies;
4201 hdr->pgio_done_cb = nfs4_read_done_cb;
4202 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
4203 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
4206 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4207 struct nfs_pgio_header *hdr)
4209 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4210 &hdr->args.seq_args,
4214 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4215 hdr->args.lock_context,
4216 hdr->rw_ops->rw_mode) == -EIO)
4218 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
4223 static int nfs4_write_done_cb(struct rpc_task *task,
4224 struct nfs_pgio_header *hdr)
4226 struct inode *inode = hdr->inode;
4228 trace_nfs4_write(hdr, task->tk_status);
4229 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4230 hdr->args.context->state,
4232 rpc_restart_call_prepare(task);
4235 if (task->tk_status >= 0) {
4236 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4237 nfs_post_op_update_inode_force_wcc(inode, &hdr->fattr);
4242 static bool nfs4_write_stateid_changed(struct rpc_task *task,
4243 struct nfs_pgio_args *args)
4246 if (!nfs4_error_stateid_expired(task->tk_status) ||
4247 nfs4_stateid_is_current(&args->stateid,
4252 rpc_restart_call_prepare(task);
4256 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4258 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4260 if (nfs4_write_stateid_changed(task, &hdr->args))
4262 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4263 nfs4_write_done_cb(task, hdr);
4267 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
4269 /* Don't request attributes for pNFS or O_DIRECT writes */
4270 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
4272 /* Otherwise, request attributes if and only if we don't hold
4275 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
4278 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4279 struct rpc_message *msg)
4281 struct nfs_server *server = NFS_SERVER(hdr->inode);
4283 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4284 hdr->args.bitmask = NULL;
4285 hdr->res.fattr = NULL;
4287 hdr->args.bitmask = server->cache_consistency_bitmask;
4289 if (!hdr->pgio_done_cb)
4290 hdr->pgio_done_cb = nfs4_write_done_cb;
4291 hdr->res.server = server;
4292 hdr->timestamp = jiffies;
4294 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
4295 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
4298 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
4300 nfs4_setup_sequence(NFS_SERVER(data->inode),
4301 &data->args.seq_args,
4306 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
4308 struct inode *inode = data->inode;
4310 trace_nfs4_commit(data, task->tk_status);
4311 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4312 NULL, NULL) == -EAGAIN) {
4313 rpc_restart_call_prepare(task);
4319 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
4321 if (!nfs4_sequence_done(task, &data->res.seq_res))
4323 return data->commit_done_cb(task, data);
4326 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
4328 struct nfs_server *server = NFS_SERVER(data->inode);
4330 if (data->commit_done_cb == NULL)
4331 data->commit_done_cb = nfs4_commit_done_cb;
4332 data->res.server = server;
4333 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
4334 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4337 struct nfs4_renewdata {
4338 struct nfs_client *client;
4339 unsigned long timestamp;
4343 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4344 * standalone procedure for queueing an asynchronous RENEW.
4346 static void nfs4_renew_release(void *calldata)
4348 struct nfs4_renewdata *data = calldata;
4349 struct nfs_client *clp = data->client;
4351 if (atomic_read(&clp->cl_count) > 1)
4352 nfs4_schedule_state_renewal(clp);
4353 nfs_put_client(clp);
4357 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
4359 struct nfs4_renewdata *data = calldata;
4360 struct nfs_client *clp = data->client;
4361 unsigned long timestamp = data->timestamp;
4363 trace_nfs4_renew_async(clp, task->tk_status);
4364 switch (task->tk_status) {
4367 case -NFS4ERR_LEASE_MOVED:
4368 nfs4_schedule_lease_moved_recovery(clp);
4371 /* Unless we're shutting down, schedule state recovery! */
4372 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4374 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
4375 nfs4_schedule_lease_recovery(clp);
4378 nfs4_schedule_path_down_recovery(clp);
4380 do_renew_lease(clp, timestamp);
4383 static const struct rpc_call_ops nfs4_renew_ops = {
4384 .rpc_call_done = nfs4_renew_done,
4385 .rpc_release = nfs4_renew_release,
4388 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
4390 struct rpc_message msg = {
4391 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4395 struct nfs4_renewdata *data;
4397 if (renew_flags == 0)
4399 if (!atomic_inc_not_zero(&clp->cl_count))
4401 data = kmalloc(sizeof(*data), GFP_NOFS);
4405 data->timestamp = jiffies;
4406 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
4407 &nfs4_renew_ops, data);
4410 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
4412 struct rpc_message msg = {
4413 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4417 unsigned long now = jiffies;
4420 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4423 do_renew_lease(clp, now);
4427 static inline int nfs4_server_supports_acls(struct nfs_server *server)
4429 return server->caps & NFS_CAP_ACLS;
4432 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4433 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
4436 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
4438 static int buf_to_pages_noslab(const void *buf, size_t buflen,
4439 struct page **pages, unsigned int *pgbase)
4441 struct page *newpage, **spages;
4447 len = min_t(size_t, PAGE_SIZE, buflen);
4448 newpage = alloc_page(GFP_KERNEL);
4450 if (newpage == NULL)
4452 memcpy(page_address(newpage), buf, len);
4457 } while (buflen != 0);
4463 __free_page(spages[rc-1]);
4467 struct nfs4_cached_acl {
4473 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4475 struct nfs_inode *nfsi = NFS_I(inode);
4477 spin_lock(&inode->i_lock);
4478 kfree(nfsi->nfs4_acl);
4479 nfsi->nfs4_acl = acl;
4480 spin_unlock(&inode->i_lock);
4483 static void nfs4_zap_acl_attr(struct inode *inode)
4485 nfs4_set_cached_acl(inode, NULL);
4488 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4490 struct nfs_inode *nfsi = NFS_I(inode);
4491 struct nfs4_cached_acl *acl;
4494 spin_lock(&inode->i_lock);
4495 acl = nfsi->nfs4_acl;
4498 if (buf == NULL) /* user is just asking for length */
4500 if (acl->cached == 0)
4502 ret = -ERANGE; /* see getxattr(2) man page */
4503 if (acl->len > buflen)
4505 memcpy(buf, acl->data, acl->len);
4509 spin_unlock(&inode->i_lock);
4513 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
4515 struct nfs4_cached_acl *acl;
4516 size_t buflen = sizeof(*acl) + acl_len;
4518 if (buflen <= PAGE_SIZE) {
4519 acl = kmalloc(buflen, GFP_KERNEL);
4523 _copy_from_pages(acl->data, pages, pgbase, acl_len);
4525 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4532 nfs4_set_cached_acl(inode, acl);
4536 * The getxattr API returns the required buffer length when called with a
4537 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4538 * the required buf. On a NULL buf, we send a page of data to the server
4539 * guessing that the ACL request can be serviced by a page. If so, we cache
4540 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4541 * the cache. If not so, we throw away the page, and cache the required
4542 * length. The next getxattr call will then produce another round trip to
4543 * the server, this time with the input buf of the required size.
4545 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4547 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
4548 struct nfs_getaclargs args = {
4549 .fh = NFS_FH(inode),
4553 struct nfs_getaclres res = {
4556 struct rpc_message msg = {
4557 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4561 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4562 int ret = -ENOMEM, i;
4564 /* As long as we're doing a round trip to the server anyway,
4565 * let's be prepared for a page of acl data. */
4568 if (npages > ARRAY_SIZE(pages))
4571 for (i = 0; i < npages; i++) {
4572 pages[i] = alloc_page(GFP_KERNEL);
4577 /* for decoding across pages */
4578 res.acl_scratch = alloc_page(GFP_KERNEL);
4579 if (!res.acl_scratch)
4582 args.acl_len = npages * PAGE_SIZE;
4583 args.acl_pgbase = 0;
4585 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
4586 __func__, buf, buflen, npages, args.acl_len);
4587 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4588 &msg, &args.seq_args, &res.seq_res, 0);
4592 /* Handle the case where the passed-in buffer is too short */
4593 if (res.acl_flags & NFS4_ACL_TRUNC) {
4594 /* Did the user only issue a request for the acl length? */
4600 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
4602 if (res.acl_len > buflen) {
4606 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
4611 for (i = 0; i < npages; i++)
4613 __free_page(pages[i]);
4614 if (res.acl_scratch)
4615 __free_page(res.acl_scratch);
4619 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4621 struct nfs4_exception exception = { };
4624 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4625 trace_nfs4_get_acl(inode, ret);
4628 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4629 } while (exception.retry);
4633 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4635 struct nfs_server *server = NFS_SERVER(inode);
4638 if (!nfs4_server_supports_acls(server))
4640 ret = nfs_revalidate_inode(server, inode);
4643 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4644 nfs_zap_acl_cache(inode);
4645 ret = nfs4_read_cached_acl(inode, buf, buflen);
4647 /* -ENOENT is returned if there is no ACL or if there is an ACL
4648 * but no cached acl data, just the acl length */
4650 return nfs4_get_acl_uncached(inode, buf, buflen);
4653 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4655 struct nfs_server *server = NFS_SERVER(inode);
4656 struct page *pages[NFS4ACL_MAXPAGES];
4657 struct nfs_setaclargs arg = {
4658 .fh = NFS_FH(inode),
4662 struct nfs_setaclres res;
4663 struct rpc_message msg = {
4664 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4668 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4671 if (!nfs4_server_supports_acls(server))
4673 if (npages > ARRAY_SIZE(pages))
4675 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4678 nfs4_inode_return_delegation(inode);
4679 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4682 * Free each page after tx, so the only ref left is
4683 * held by the network stack
4686 put_page(pages[i-1]);
4689 * Acl update can result in inode attribute update.
4690 * so mark the attribute cache invalid.
4692 spin_lock(&inode->i_lock);
4693 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4694 spin_unlock(&inode->i_lock);
4695 nfs_access_zap_cache(inode);
4696 nfs_zap_acl_cache(inode);
4700 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4702 struct nfs4_exception exception = { };
4705 err = __nfs4_proc_set_acl(inode, buf, buflen);
4706 trace_nfs4_set_acl(inode, err);
4707 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4709 } while (exception.retry);
4713 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
4714 static int _nfs4_get_security_label(struct inode *inode, void *buf,
4717 struct nfs_server *server = NFS_SERVER(inode);
4718 struct nfs_fattr fattr;
4719 struct nfs4_label label = {0, 0, buflen, buf};
4721 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4722 struct nfs4_getattr_arg arg = {
4723 .fh = NFS_FH(inode),
4726 struct nfs4_getattr_res res = {
4731 struct rpc_message msg = {
4732 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4738 nfs_fattr_init(&fattr);
4740 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
4743 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4745 if (buflen < label.len)
4750 static int nfs4_get_security_label(struct inode *inode, void *buf,
4753 struct nfs4_exception exception = { };
4756 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4760 err = _nfs4_get_security_label(inode, buf, buflen);
4761 trace_nfs4_get_security_label(inode, err);
4762 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4764 } while (exception.retry);
4768 static int _nfs4_do_set_security_label(struct inode *inode,
4769 struct nfs4_label *ilabel,
4770 struct nfs_fattr *fattr,
4771 struct nfs4_label *olabel)
4774 struct iattr sattr = {0};
4775 struct nfs_server *server = NFS_SERVER(inode);
4776 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4777 struct nfs_setattrargs arg = {
4778 .fh = NFS_FH(inode),
4784 struct nfs_setattrres res = {
4789 struct rpc_message msg = {
4790 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
4796 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
4798 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4800 dprintk("%s failed: %d\n", __func__, status);
4805 static int nfs4_do_set_security_label(struct inode *inode,
4806 struct nfs4_label *ilabel,
4807 struct nfs_fattr *fattr,
4808 struct nfs4_label *olabel)
4810 struct nfs4_exception exception = { };
4814 err = _nfs4_do_set_security_label(inode, ilabel,
4816 trace_nfs4_set_security_label(inode, err);
4817 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4819 } while (exception.retry);
4824 nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4826 struct nfs4_label ilabel, *olabel = NULL;
4827 struct nfs_fattr fattr;
4828 struct rpc_cred *cred;
4829 struct inode *inode = dentry->d_inode;
4832 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4835 nfs_fattr_init(&fattr);
4839 ilabel.label = (char *)buf;
4840 ilabel.len = buflen;
4842 cred = rpc_lookup_cred();
4844 return PTR_ERR(cred);
4846 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4847 if (IS_ERR(olabel)) {
4848 status = -PTR_ERR(olabel);
4852 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4854 nfs_setsecurity(inode, &fattr, olabel);
4856 nfs4_label_free(olabel);
4861 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4865 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
4866 struct nfs4_state *state, long *timeout)
4868 struct nfs_client *clp = server->nfs_client;
4870 if (task->tk_status >= 0)
4872 switch(task->tk_status) {
4873 case -NFS4ERR_DELEG_REVOKED:
4874 case -NFS4ERR_ADMIN_REVOKED:
4875 case -NFS4ERR_BAD_STATEID:
4876 case -NFS4ERR_OPENMODE:
4879 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4880 goto recovery_failed;
4881 goto wait_on_recovery;
4882 case -NFS4ERR_EXPIRED:
4883 if (state != NULL) {
4884 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4885 goto recovery_failed;
4887 case -NFS4ERR_STALE_STATEID:
4888 case -NFS4ERR_STALE_CLIENTID:
4889 nfs4_schedule_lease_recovery(clp);
4890 goto wait_on_recovery;
4891 case -NFS4ERR_MOVED:
4892 if (nfs4_schedule_migration_recovery(server) < 0)
4893 goto recovery_failed;
4894 goto wait_on_recovery;
4895 case -NFS4ERR_LEASE_MOVED:
4896 nfs4_schedule_lease_moved_recovery(clp);
4897 goto wait_on_recovery;
4898 #if defined(CONFIG_NFS_V4_1)
4899 case -NFS4ERR_BADSESSION:
4900 case -NFS4ERR_BADSLOT:
4901 case -NFS4ERR_BAD_HIGH_SLOT:
4902 case -NFS4ERR_DEADSESSION:
4903 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4904 case -NFS4ERR_SEQ_FALSE_RETRY:
4905 case -NFS4ERR_SEQ_MISORDERED:
4906 dprintk("%s ERROR %d, Reset session\n", __func__,
4908 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4909 goto wait_on_recovery;
4910 #endif /* CONFIG_NFS_V4_1 */
4911 case -NFS4ERR_DELAY:
4912 nfs_inc_server_stats(server, NFSIOS_DELAY);
4913 rpc_delay(task, nfs4_update_delay(timeout));
4915 case -NFS4ERR_GRACE:
4916 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4917 case -NFS4ERR_RETRY_UNCACHED_REP:
4918 case -NFS4ERR_OLD_STATEID:
4921 task->tk_status = nfs4_map_errors(task->tk_status);
4924 task->tk_status = -EIO;
4927 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
4928 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4929 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4930 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4931 goto recovery_failed;
4933 task->tk_status = 0;
4937 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4938 nfs4_verifier *bootverf)
4942 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4943 /* An impossible timestamp guarantees this value
4944 * will never match a generated boot time. */
4946 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
4948 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4949 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4950 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
4952 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4956 nfs4_init_nonuniform_client_string(struct nfs_client *clp,
4957 char *buf, size_t len)
4959 unsigned int result;
4961 if (clp->cl_owner_id != NULL)
4962 return strlcpy(buf, clp->cl_owner_id, len);
4965 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4967 rpc_peeraddr2str(clp->cl_rpcclient,
4969 rpc_peeraddr2str(clp->cl_rpcclient,
4970 RPC_DISPLAY_PROTO));
4972 clp->cl_owner_id = kstrdup(buf, GFP_KERNEL);
4977 nfs4_init_uniform_client_string(struct nfs_client *clp,
4978 char *buf, size_t len)
4980 const char *nodename = clp->cl_rpcclient->cl_nodename;
4981 unsigned int result;
4983 if (clp->cl_owner_id != NULL)
4984 return strlcpy(buf, clp->cl_owner_id, len);
4986 if (nfs4_client_id_uniquifier[0] != '\0')
4987 result = scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4988 clp->rpc_ops->version,
4989 clp->cl_minorversion,
4990 nfs4_client_id_uniquifier,
4993 result = scnprintf(buf, len, "Linux NFSv%u.%u %s",
4994 clp->rpc_ops->version, clp->cl_minorversion,
4996 clp->cl_owner_id = kstrdup(buf, GFP_KERNEL);
5001 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5002 * services. Advertise one based on the address family of the
5006 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5008 if (strchr(clp->cl_ipaddr, ':') != NULL)
5009 return scnprintf(buf, len, "tcp6");
5011 return scnprintf(buf, len, "tcp");
5014 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5016 struct nfs4_setclientid *sc = calldata;
5018 if (task->tk_status == 0)
5019 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5022 static const struct rpc_call_ops nfs4_setclientid_ops = {
5023 .rpc_call_done = nfs4_setclientid_done,
5027 * nfs4_proc_setclientid - Negotiate client ID
5028 * @clp: state data structure
5029 * @program: RPC program for NFSv4 callback service
5030 * @port: IP port number for NFS4 callback service
5031 * @cred: RPC credential to use for this call
5032 * @res: where to place the result
5034 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5036 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5037 unsigned short port, struct rpc_cred *cred,
5038 struct nfs4_setclientid_res *res)
5040 nfs4_verifier sc_verifier;
5041 struct nfs4_setclientid setclientid = {
5042 .sc_verifier = &sc_verifier,
5044 .sc_cb_ident = clp->cl_cb_ident,
5046 struct rpc_message msg = {
5047 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5048 .rpc_argp = &setclientid,
5052 struct rpc_task *task;
5053 struct rpc_task_setup task_setup_data = {
5054 .rpc_client = clp->cl_rpcclient,
5055 .rpc_message = &msg,
5056 .callback_ops = &nfs4_setclientid_ops,
5057 .callback_data = &setclientid,
5058 .flags = RPC_TASK_TIMEOUT,
5062 /* nfs_client_id4 */
5063 nfs4_init_boot_verifier(clp, &sc_verifier);
5064 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5065 setclientid.sc_name_len =
5066 nfs4_init_uniform_client_string(clp,
5067 setclientid.sc_name,
5068 sizeof(setclientid.sc_name));
5070 setclientid.sc_name_len =
5071 nfs4_init_nonuniform_client_string(clp,
5072 setclientid.sc_name,
5073 sizeof(setclientid.sc_name));
5075 setclientid.sc_netid_len =
5076 nfs4_init_callback_netid(clp,
5077 setclientid.sc_netid,
5078 sizeof(setclientid.sc_netid));
5079 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
5080 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
5081 clp->cl_ipaddr, port >> 8, port & 255);
5083 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
5084 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5085 setclientid.sc_name_len, setclientid.sc_name);
5086 task = rpc_run_task(&task_setup_data);
5088 status = PTR_ERR(task);
5091 status = task->tk_status;
5092 if (setclientid.sc_cred) {
5093 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5094 put_rpccred(setclientid.sc_cred);
5098 trace_nfs4_setclientid(clp, status);
5099 dprintk("NFS reply setclientid: %d\n", status);
5104 * nfs4_proc_setclientid_confirm - Confirm client ID
5105 * @clp: state data structure
5106 * @res: result of a previous SETCLIENTID
5107 * @cred: RPC credential to use for this call
5109 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5111 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
5112 struct nfs4_setclientid_res *arg,
5113 struct rpc_cred *cred)
5115 struct rpc_message msg = {
5116 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
5122 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5123 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5125 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5126 trace_nfs4_setclientid_confirm(clp, status);
5127 dprintk("NFS reply setclientid_confirm: %d\n", status);
5131 struct nfs4_delegreturndata {
5132 struct nfs4_delegreturnargs args;
5133 struct nfs4_delegreturnres res;
5135 nfs4_stateid stateid;
5136 unsigned long timestamp;
5137 struct nfs_fattr fattr;
5139 struct inode *inode;
5144 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5146 struct nfs4_delegreturndata *data = calldata;
5148 if (!nfs4_sequence_done(task, &data->res.seq_res))
5151 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
5152 switch (task->tk_status) {
5154 renew_lease(data->res.server, data->timestamp);
5155 case -NFS4ERR_ADMIN_REVOKED:
5156 case -NFS4ERR_DELEG_REVOKED:
5157 case -NFS4ERR_BAD_STATEID:
5158 case -NFS4ERR_OLD_STATEID:
5159 case -NFS4ERR_STALE_STATEID:
5160 case -NFS4ERR_EXPIRED:
5161 task->tk_status = 0;
5163 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
5166 if (nfs4_async_handle_error(task, data->res.server,
5167 NULL, NULL) == -EAGAIN) {
5168 rpc_restart_call_prepare(task);
5172 data->rpc_status = task->tk_status;
5175 static void nfs4_delegreturn_release(void *calldata)
5177 struct nfs4_delegreturndata *data = calldata;
5178 struct inode *inode = data->inode;
5182 pnfs_roc_release(inode);
5183 nfs_iput_and_deactive(inode);
5188 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5190 struct nfs4_delegreturndata *d_data;
5192 d_data = (struct nfs4_delegreturndata *)data;
5195 pnfs_roc_drain(d_data->inode, &d_data->roc_barrier, task))
5198 nfs4_setup_sequence(d_data->res.server,
5199 &d_data->args.seq_args,
5200 &d_data->res.seq_res,
5204 static const struct rpc_call_ops nfs4_delegreturn_ops = {
5205 .rpc_call_prepare = nfs4_delegreturn_prepare,
5206 .rpc_call_done = nfs4_delegreturn_done,
5207 .rpc_release = nfs4_delegreturn_release,
5210 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5212 struct nfs4_delegreturndata *data;
5213 struct nfs_server *server = NFS_SERVER(inode);
5214 struct rpc_task *task;
5215 struct rpc_message msg = {
5216 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5219 struct rpc_task_setup task_setup_data = {
5220 .rpc_client = server->client,
5221 .rpc_message = &msg,
5222 .callback_ops = &nfs4_delegreturn_ops,
5223 .flags = RPC_TASK_ASYNC,
5227 data = kzalloc(sizeof(*data), GFP_NOFS);
5230 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
5231 data->args.fhandle = &data->fh;
5232 data->args.stateid = &data->stateid;
5233 data->args.bitmask = server->cache_consistency_bitmask;
5234 nfs_copy_fh(&data->fh, NFS_FH(inode));
5235 nfs4_stateid_copy(&data->stateid, stateid);
5236 data->res.fattr = &data->fattr;
5237 data->res.server = server;
5238 nfs_fattr_init(data->res.fattr);
5239 data->timestamp = jiffies;
5240 data->rpc_status = 0;
5241 data->inode = nfs_igrab_and_active(inode);
5243 data->roc = nfs4_roc(inode);
5245 task_setup_data.callback_data = data;
5246 msg.rpc_argp = &data->args;
5247 msg.rpc_resp = &data->res;
5248 task = rpc_run_task(&task_setup_data);
5250 return PTR_ERR(task);
5253 status = nfs4_wait_for_completion_rpc_task(task);
5256 status = data->rpc_status;
5258 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5260 nfs_refresh_inode(inode, &data->fattr);
5266 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5268 struct nfs_server *server = NFS_SERVER(inode);
5269 struct nfs4_exception exception = { };
5272 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
5273 trace_nfs4_delegreturn(inode, err);
5275 case -NFS4ERR_STALE_STATEID:
5276 case -NFS4ERR_EXPIRED:
5280 err = nfs4_handle_exception(server, err, &exception);
5281 } while (exception.retry);
5285 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5286 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5289 * sleep, with exponential backoff, and retry the LOCK operation.
5291 static unsigned long
5292 nfs4_set_lock_task_retry(unsigned long timeout)
5294 freezable_schedule_timeout_killable_unsafe(timeout);
5296 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5297 return NFS4_LOCK_MAXTIMEOUT;
5301 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5303 struct inode *inode = state->inode;
5304 struct nfs_server *server = NFS_SERVER(inode);
5305 struct nfs_client *clp = server->nfs_client;
5306 struct nfs_lockt_args arg = {
5307 .fh = NFS_FH(inode),
5310 struct nfs_lockt_res res = {
5313 struct rpc_message msg = {
5314 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5317 .rpc_cred = state->owner->so_cred,
5319 struct nfs4_lock_state *lsp;
5322 arg.lock_owner.clientid = clp->cl_clientid;
5323 status = nfs4_set_lock_state(state, request);
5326 lsp = request->fl_u.nfs4_fl.owner;
5327 arg.lock_owner.id = lsp->ls_seqid.owner_id;
5328 arg.lock_owner.s_dev = server->s_dev;
5329 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5332 request->fl_type = F_UNLCK;
5334 case -NFS4ERR_DENIED:
5337 request->fl_ops->fl_release_private(request);
5338 request->fl_ops = NULL;
5343 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5345 struct nfs4_exception exception = { };
5349 err = _nfs4_proc_getlk(state, cmd, request);
5350 trace_nfs4_get_lock(request, state, cmd, err);
5351 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
5353 } while (exception.retry);
5357 static int do_vfs_lock(struct file *file, struct file_lock *fl)
5360 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5362 res = posix_lock_file_wait(file, fl);
5365 res = flock_lock_file_wait(file, fl);
5373 struct nfs4_unlockdata {
5374 struct nfs_locku_args arg;
5375 struct nfs_locku_res res;
5376 struct nfs4_lock_state *lsp;
5377 struct nfs_open_context *ctx;
5378 struct file_lock fl;
5379 const struct nfs_server *server;
5380 unsigned long timestamp;
5383 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5384 struct nfs_open_context *ctx,
5385 struct nfs4_lock_state *lsp,
5386 struct nfs_seqid *seqid)
5388 struct nfs4_unlockdata *p;
5389 struct inode *inode = lsp->ls_state->inode;
5391 p = kzalloc(sizeof(*p), GFP_NOFS);
5394 p->arg.fh = NFS_FH(inode);
5396 p->arg.seqid = seqid;
5397 p->res.seqid = seqid;
5399 atomic_inc(&lsp->ls_count);
5400 /* Ensure we don't close file until we're done freeing locks! */
5401 p->ctx = get_nfs_open_context(ctx);
5402 memcpy(&p->fl, fl, sizeof(p->fl));
5403 p->server = NFS_SERVER(inode);
5407 static void nfs4_locku_release_calldata(void *data)
5409 struct nfs4_unlockdata *calldata = data;
5410 nfs_free_seqid(calldata->arg.seqid);
5411 nfs4_put_lock_state(calldata->lsp);
5412 put_nfs_open_context(calldata->ctx);
5416 static void nfs4_locku_done(struct rpc_task *task, void *data)
5418 struct nfs4_unlockdata *calldata = data;
5420 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5422 switch (task->tk_status) {
5424 renew_lease(calldata->server, calldata->timestamp);
5425 do_vfs_lock(calldata->fl.fl_file, &calldata->fl);
5426 if (nfs4_update_lock_stateid(calldata->lsp,
5427 &calldata->res.stateid))
5429 case -NFS4ERR_BAD_STATEID:
5430 case -NFS4ERR_OLD_STATEID:
5431 case -NFS4ERR_STALE_STATEID:
5432 case -NFS4ERR_EXPIRED:
5433 if (!nfs4_stateid_match(&calldata->arg.stateid,
5434 &calldata->lsp->ls_stateid))
5435 rpc_restart_call_prepare(task);
5438 if (nfs4_async_handle_error(task, calldata->server,
5439 NULL, NULL) == -EAGAIN)
5440 rpc_restart_call_prepare(task);
5442 nfs_release_seqid(calldata->arg.seqid);
5445 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
5447 struct nfs4_unlockdata *calldata = data;
5449 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
5451 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
5452 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
5453 /* Note: exit _without_ running nfs4_locku_done */
5456 calldata->timestamp = jiffies;
5457 if (nfs4_setup_sequence(calldata->server,
5458 &calldata->arg.seq_args,
5459 &calldata->res.seq_res,
5461 nfs_release_seqid(calldata->arg.seqid);
5464 task->tk_action = NULL;
5466 nfs4_sequence_done(task, &calldata->res.seq_res);
5469 static const struct rpc_call_ops nfs4_locku_ops = {
5470 .rpc_call_prepare = nfs4_locku_prepare,
5471 .rpc_call_done = nfs4_locku_done,
5472 .rpc_release = nfs4_locku_release_calldata,
5475 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5476 struct nfs_open_context *ctx,
5477 struct nfs4_lock_state *lsp,
5478 struct nfs_seqid *seqid)
5480 struct nfs4_unlockdata *data;
5481 struct rpc_message msg = {
5482 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5483 .rpc_cred = ctx->cred,
5485 struct rpc_task_setup task_setup_data = {
5486 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5487 .rpc_message = &msg,
5488 .callback_ops = &nfs4_locku_ops,
5489 .workqueue = nfsiod_workqueue,
5490 .flags = RPC_TASK_ASYNC,
5493 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5494 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5496 /* Ensure this is an unlock - when canceling a lock, the
5497 * canceled lock is passed in, and it won't be an unlock.
5499 fl->fl_type = F_UNLCK;
5501 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5503 nfs_free_seqid(seqid);
5504 return ERR_PTR(-ENOMEM);
5507 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5508 msg.rpc_argp = &data->arg;
5509 msg.rpc_resp = &data->res;
5510 task_setup_data.callback_data = data;
5511 return rpc_run_task(&task_setup_data);
5514 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5516 struct inode *inode = state->inode;
5517 struct nfs4_state_owner *sp = state->owner;
5518 struct nfs_inode *nfsi = NFS_I(inode);
5519 struct nfs_seqid *seqid;
5520 struct nfs4_lock_state *lsp;
5521 struct rpc_task *task;
5522 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
5524 unsigned char fl_flags = request->fl_flags;
5526 status = nfs4_set_lock_state(state, request);
5527 /* Unlock _before_ we do the RPC call */
5528 request->fl_flags |= FL_EXISTS;
5529 /* Exclude nfs_delegation_claim_locks() */
5530 mutex_lock(&sp->so_delegreturn_mutex);
5531 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
5532 down_read(&nfsi->rwsem);
5533 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5534 up_read(&nfsi->rwsem);
5535 mutex_unlock(&sp->so_delegreturn_mutex);
5538 up_read(&nfsi->rwsem);
5539 mutex_unlock(&sp->so_delegreturn_mutex);
5542 /* Is this a delegated lock? */
5543 lsp = request->fl_u.nfs4_fl.owner;
5544 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5546 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5547 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
5551 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
5552 status = PTR_ERR(task);
5555 status = nfs4_wait_for_completion_rpc_task(task);
5558 request->fl_flags = fl_flags;
5559 trace_nfs4_unlock(request, state, F_SETLK, status);
5563 struct nfs4_lockdata {
5564 struct nfs_lock_args arg;
5565 struct nfs_lock_res res;
5566 struct nfs4_lock_state *lsp;
5567 struct nfs_open_context *ctx;
5568 struct file_lock fl;
5569 unsigned long timestamp;
5572 struct nfs_server *server;
5575 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
5576 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5579 struct nfs4_lockdata *p;
5580 struct inode *inode = lsp->ls_state->inode;
5581 struct nfs_server *server = NFS_SERVER(inode);
5582 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
5584 p = kzalloc(sizeof(*p), gfp_mask);
5588 p->arg.fh = NFS_FH(inode);
5590 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
5591 if (IS_ERR(p->arg.open_seqid))
5593 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5594 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
5595 if (IS_ERR(p->arg.lock_seqid))
5596 goto out_free_seqid;
5597 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
5598 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
5599 p->arg.lock_owner.s_dev = server->s_dev;
5600 p->res.lock_seqid = p->arg.lock_seqid;
5603 atomic_inc(&lsp->ls_count);
5604 p->ctx = get_nfs_open_context(ctx);
5605 memcpy(&p->fl, fl, sizeof(p->fl));
5608 nfs_free_seqid(p->arg.open_seqid);
5614 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5616 struct nfs4_lockdata *data = calldata;
5617 struct nfs4_state *state = data->lsp->ls_state;
5619 dprintk("%s: begin!\n", __func__);
5620 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
5622 /* Do we need to do an open_to_lock_owner? */
5623 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
5624 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
5625 goto out_release_lock_seqid;
5627 nfs4_stateid_copy(&data->arg.open_stateid,
5628 &state->open_stateid);
5629 data->arg.new_lock_owner = 1;
5630 data->res.open_seqid = data->arg.open_seqid;
5632 data->arg.new_lock_owner = 0;
5633 nfs4_stateid_copy(&data->arg.lock_stateid,
5634 &data->lsp->ls_stateid);
5636 if (!nfs4_valid_open_stateid(state)) {
5637 data->rpc_status = -EBADF;
5638 task->tk_action = NULL;
5639 goto out_release_open_seqid;
5641 data->timestamp = jiffies;
5642 if (nfs4_setup_sequence(data->server,
5643 &data->arg.seq_args,
5647 out_release_open_seqid:
5648 nfs_release_seqid(data->arg.open_seqid);
5649 out_release_lock_seqid:
5650 nfs_release_seqid(data->arg.lock_seqid);
5652 nfs4_sequence_done(task, &data->res.seq_res);
5653 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
5656 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5658 struct nfs4_lockdata *data = calldata;
5659 struct nfs4_lock_state *lsp = data->lsp;
5661 dprintk("%s: begin!\n", __func__);
5663 if (!nfs4_sequence_done(task, &data->res.seq_res))
5666 data->rpc_status = task->tk_status;
5667 switch (task->tk_status) {
5669 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode),
5671 if (data->arg.new_lock) {
5672 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
5673 if (do_vfs_lock(data->fl.fl_file, &data->fl) < 0) {
5674 rpc_restart_call_prepare(task);
5678 if (data->arg.new_lock_owner != 0) {
5679 nfs_confirm_seqid(&lsp->ls_seqid, 0);
5680 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
5681 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5682 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
5683 rpc_restart_call_prepare(task);
5685 case -NFS4ERR_BAD_STATEID:
5686 case -NFS4ERR_OLD_STATEID:
5687 case -NFS4ERR_STALE_STATEID:
5688 case -NFS4ERR_EXPIRED:
5689 if (data->arg.new_lock_owner != 0) {
5690 if (!nfs4_stateid_match(&data->arg.open_stateid,
5691 &lsp->ls_state->open_stateid))
5692 rpc_restart_call_prepare(task);
5693 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
5695 rpc_restart_call_prepare(task);
5697 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
5700 static void nfs4_lock_release(void *calldata)
5702 struct nfs4_lockdata *data = calldata;
5704 dprintk("%s: begin!\n", __func__);
5705 nfs_free_seqid(data->arg.open_seqid);
5706 if (data->cancelled != 0) {
5707 struct rpc_task *task;
5708 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5709 data->arg.lock_seqid);
5711 rpc_put_task_async(task);
5712 dprintk("%s: cancelling lock!\n", __func__);
5714 nfs_free_seqid(data->arg.lock_seqid);
5715 nfs4_put_lock_state(data->lsp);
5716 put_nfs_open_context(data->ctx);
5718 dprintk("%s: done!\n", __func__);
5721 static const struct rpc_call_ops nfs4_lock_ops = {
5722 .rpc_call_prepare = nfs4_lock_prepare,
5723 .rpc_call_done = nfs4_lock_done,
5724 .rpc_release = nfs4_lock_release,
5727 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5730 case -NFS4ERR_ADMIN_REVOKED:
5731 case -NFS4ERR_BAD_STATEID:
5732 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
5733 if (new_lock_owner != 0 ||
5734 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
5735 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
5737 case -NFS4ERR_STALE_STATEID:
5738 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
5739 case -NFS4ERR_EXPIRED:
5740 nfs4_schedule_lease_recovery(server->nfs_client);
5744 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
5746 struct nfs4_lockdata *data;
5747 struct rpc_task *task;
5748 struct rpc_message msg = {
5749 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5750 .rpc_cred = state->owner->so_cred,
5752 struct rpc_task_setup task_setup_data = {
5753 .rpc_client = NFS_CLIENT(state->inode),
5754 .rpc_message = &msg,
5755 .callback_ops = &nfs4_lock_ops,
5756 .workqueue = nfsiod_workqueue,
5757 .flags = RPC_TASK_ASYNC,
5761 dprintk("%s: begin!\n", __func__);
5762 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
5763 fl->fl_u.nfs4_fl.owner,
5764 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
5768 data->arg.block = 1;
5769 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5770 msg.rpc_argp = &data->arg;
5771 msg.rpc_resp = &data->res;
5772 task_setup_data.callback_data = data;
5773 if (recovery_type > NFS_LOCK_NEW) {
5774 if (recovery_type == NFS_LOCK_RECLAIM)
5775 data->arg.reclaim = NFS_LOCK_RECLAIM;
5776 nfs4_set_sequence_privileged(&data->arg.seq_args);
5778 data->arg.new_lock = 1;
5779 task = rpc_run_task(&task_setup_data);
5781 return PTR_ERR(task);
5782 ret = nfs4_wait_for_completion_rpc_task(task);
5784 ret = data->rpc_status;
5786 nfs4_handle_setlk_error(data->server, data->lsp,
5787 data->arg.new_lock_owner, ret);
5789 data->cancelled = 1;
5791 dprintk("%s: done, ret = %d!\n", __func__, ret);
5795 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5797 struct nfs_server *server = NFS_SERVER(state->inode);
5798 struct nfs4_exception exception = {
5799 .inode = state->inode,
5804 /* Cache the lock if possible... */
5805 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5807 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
5808 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
5809 if (err != -NFS4ERR_DELAY)
5811 nfs4_handle_exception(server, err, &exception);
5812 } while (exception.retry);
5816 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5818 struct nfs_server *server = NFS_SERVER(state->inode);
5819 struct nfs4_exception exception = {
5820 .inode = state->inode,
5824 err = nfs4_set_lock_state(state, request);
5827 if (!recover_lost_locks) {
5828 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5832 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5834 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
5835 trace_nfs4_lock_expired(request, state, F_SETLK, err);
5839 case -NFS4ERR_GRACE:
5840 case -NFS4ERR_DELAY:
5841 nfs4_handle_exception(server, err, &exception);
5844 } while (exception.retry);
5849 #if defined(CONFIG_NFS_V4_1)
5851 * nfs41_check_expired_locks - possibly free a lock stateid
5853 * @state: NFSv4 state for an inode
5855 * Returns NFS_OK if recovery for this stateid is now finished.
5856 * Otherwise a negative NFS4ERR value is returned.
5858 static int nfs41_check_expired_locks(struct nfs4_state *state)
5860 int status, ret = -NFS4ERR_BAD_STATEID;
5861 struct nfs4_lock_state *lsp;
5862 struct nfs_server *server = NFS_SERVER(state->inode);
5864 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
5865 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
5866 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5868 status = nfs41_test_stateid(server,
5871 trace_nfs4_test_lock_stateid(state, lsp, status);
5872 if (status != NFS_OK) {
5873 /* Free the stateid unless the server
5874 * informs us the stateid is unrecognized. */
5875 if (status != -NFS4ERR_BAD_STATEID)
5876 nfs41_free_stateid(server,
5879 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5888 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5890 int status = NFS_OK;
5892 if (test_bit(LK_STATE_IN_USE, &state->flags))
5893 status = nfs41_check_expired_locks(state);
5894 if (status != NFS_OK)
5895 status = nfs4_lock_expired(state, request);
5900 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5902 struct nfs_inode *nfsi = NFS_I(state->inode);
5903 unsigned char fl_flags = request->fl_flags;
5904 int status = -ENOLCK;
5906 if ((fl_flags & FL_POSIX) &&
5907 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5909 /* Is this a delegated open? */
5910 status = nfs4_set_lock_state(state, request);
5913 request->fl_flags |= FL_ACCESS;
5914 status = do_vfs_lock(request->fl_file, request);
5917 down_read(&nfsi->rwsem);
5918 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
5919 /* Yes: cache locks! */
5920 /* ...but avoid races with delegation recall... */
5921 request->fl_flags = fl_flags & ~FL_SLEEP;
5922 status = do_vfs_lock(request->fl_file, request);
5923 up_read(&nfsi->rwsem);
5926 up_read(&nfsi->rwsem);
5927 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
5929 request->fl_flags = fl_flags;
5933 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5935 struct nfs4_exception exception = {
5937 .inode = state->inode,
5942 err = _nfs4_proc_setlk(state, cmd, request);
5943 trace_nfs4_set_lock(request, state, cmd, err);
5944 if (err == -NFS4ERR_DENIED)
5946 err = nfs4_handle_exception(NFS_SERVER(state->inode),
5948 } while (exception.retry);
5953 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5955 struct nfs_open_context *ctx;
5956 struct nfs4_state *state;
5957 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5960 /* verify open state */
5961 ctx = nfs_file_open_context(filp);
5964 if (request->fl_start < 0 || request->fl_end < 0)
5967 if (IS_GETLK(cmd)) {
5969 return nfs4_proc_getlk(state, F_GETLK, request);
5973 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5976 if (request->fl_type == F_UNLCK) {
5978 return nfs4_proc_unlck(state, cmd, request);
5985 * Don't rely on the VFS having checked the file open mode,
5986 * since it won't do this for flock() locks.
5988 switch (request->fl_type) {
5990 if (!(filp->f_mode & FMODE_READ))
5994 if (!(filp->f_mode & FMODE_WRITE))
5999 status = nfs4_proc_setlk(state, cmd, request);
6000 if ((status != -EAGAIN) || IS_SETLK(cmd))
6002 timeout = nfs4_set_lock_task_retry(timeout);
6003 status = -ERESTARTSYS;
6006 } while(status < 0);
6010 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
6012 struct nfs_server *server = NFS_SERVER(state->inode);
6015 err = nfs4_set_lock_state(state, fl);
6018 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
6019 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
6022 struct nfs_release_lockowner_data {
6023 struct nfs4_lock_state *lsp;
6024 struct nfs_server *server;
6025 struct nfs_release_lockowner_args args;
6026 struct nfs_release_lockowner_res res;
6027 unsigned long timestamp;
6030 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6032 struct nfs_release_lockowner_data *data = calldata;
6033 struct nfs_server *server = data->server;
6034 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6035 &data->args.seq_args, &data->res.seq_res, task);
6036 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6037 data->timestamp = jiffies;
6040 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6042 struct nfs_release_lockowner_data *data = calldata;
6043 struct nfs_server *server = data->server;
6045 nfs40_sequence_done(task, &data->res.seq_res);
6047 switch (task->tk_status) {
6049 renew_lease(server, data->timestamp);
6051 case -NFS4ERR_STALE_CLIENTID:
6052 case -NFS4ERR_EXPIRED:
6053 nfs4_schedule_lease_recovery(server->nfs_client);
6055 case -NFS4ERR_LEASE_MOVED:
6056 case -NFS4ERR_DELAY:
6057 if (nfs4_async_handle_error(task, server,
6058 NULL, NULL) == -EAGAIN)
6059 rpc_restart_call_prepare(task);
6063 static void nfs4_release_lockowner_release(void *calldata)
6065 struct nfs_release_lockowner_data *data = calldata;
6066 nfs4_free_lock_state(data->server, data->lsp);
6070 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
6071 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6072 .rpc_call_done = nfs4_release_lockowner_done,
6073 .rpc_release = nfs4_release_lockowner_release,
6077 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
6079 struct nfs_release_lockowner_data *data;
6080 struct rpc_message msg = {
6081 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6084 if (server->nfs_client->cl_mvops->minor_version != 0)
6087 data = kmalloc(sizeof(*data), GFP_NOFS);
6091 data->server = server;
6092 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6093 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6094 data->args.lock_owner.s_dev = server->s_dev;
6096 msg.rpc_argp = &data->args;
6097 msg.rpc_resp = &data->res;
6098 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
6099 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
6102 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6104 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6105 const void *buf, size_t buflen,
6106 int flags, int type)
6108 if (strcmp(key, "") != 0)
6111 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6114 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6115 void *buf, size_t buflen, int type)
6117 if (strcmp(key, "") != 0)
6120 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6123 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6124 size_t list_len, const char *name,
6125 size_t name_len, int type)
6127 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6129 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
6132 if (list && len <= list_len)
6133 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
6137 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
6138 static inline int nfs4_server_supports_labels(struct nfs_server *server)
6140 return server->caps & NFS_CAP_SECURITY_LABEL;
6143 static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6144 const void *buf, size_t buflen,
6145 int flags, int type)
6147 if (security_ismaclabel(key))
6148 return nfs4_set_security_label(dentry, buf, buflen);
6153 static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6154 void *buf, size_t buflen, int type)
6156 if (security_ismaclabel(key))
6157 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
6161 static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6162 size_t list_len, const char *name,
6163 size_t name_len, int type)
6167 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
6168 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
6169 if (list && len <= list_len)
6170 security_inode_listsecurity(dentry->d_inode, list, len);
6175 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6176 .prefix = XATTR_SECURITY_PREFIX,
6177 .list = nfs4_xattr_list_nfs4_label,
6178 .get = nfs4_xattr_get_nfs4_label,
6179 .set = nfs4_xattr_set_nfs4_label,
6185 * nfs_fhget will use either the mounted_on_fileid or the fileid
6187 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6189 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6190 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6191 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
6192 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
6195 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
6196 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
6197 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6201 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6202 const struct qstr *name,
6203 struct nfs4_fs_locations *fs_locations,
6206 struct nfs_server *server = NFS_SERVER(dir);
6208 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6210 struct nfs4_fs_locations_arg args = {
6211 .dir_fh = NFS_FH(dir),
6216 struct nfs4_fs_locations_res res = {
6217 .fs_locations = fs_locations,
6219 struct rpc_message msg = {
6220 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6226 dprintk("%s: start\n", __func__);
6228 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6229 * is not supported */
6230 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6231 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6233 bitmask[0] |= FATTR4_WORD0_FILEID;
6235 nfs_fattr_init(&fs_locations->fattr);
6236 fs_locations->server = server;
6237 fs_locations->nlocations = 0;
6238 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
6239 dprintk("%s: returned status = %d\n", __func__, status);
6243 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6244 const struct qstr *name,
6245 struct nfs4_fs_locations *fs_locations,
6248 struct nfs4_exception exception = { };
6251 err = _nfs4_proc_fs_locations(client, dir, name,
6252 fs_locations, page);
6253 trace_nfs4_get_fs_locations(dir, name, err);
6254 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6256 } while (exception.retry);
6261 * This operation also signals the server that this client is
6262 * performing migration recovery. The server can stop returning
6263 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6264 * appended to this compound to identify the client ID which is
6265 * performing recovery.
6267 static int _nfs40_proc_get_locations(struct inode *inode,
6268 struct nfs4_fs_locations *locations,
6269 struct page *page, struct rpc_cred *cred)
6271 struct nfs_server *server = NFS_SERVER(inode);
6272 struct rpc_clnt *clnt = server->client;
6274 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6276 struct nfs4_fs_locations_arg args = {
6277 .clientid = server->nfs_client->cl_clientid,
6278 .fh = NFS_FH(inode),
6281 .migration = 1, /* skip LOOKUP */
6282 .renew = 1, /* append RENEW */
6284 struct nfs4_fs_locations_res res = {
6285 .fs_locations = locations,
6289 struct rpc_message msg = {
6290 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6295 unsigned long now = jiffies;
6298 nfs_fattr_init(&locations->fattr);
6299 locations->server = server;
6300 locations->nlocations = 0;
6302 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6303 nfs4_set_sequence_privileged(&args.seq_args);
6304 status = nfs4_call_sync_sequence(clnt, server, &msg,
6305 &args.seq_args, &res.seq_res);
6309 renew_lease(server, now);
6313 #ifdef CONFIG_NFS_V4_1
6316 * This operation also signals the server that this client is
6317 * performing migration recovery. The server can stop asserting
6318 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6319 * performing this operation is identified in the SEQUENCE
6320 * operation in this compound.
6322 * When the client supports GETATTR(fs_locations_info), it can
6323 * be plumbed in here.
6325 static int _nfs41_proc_get_locations(struct inode *inode,
6326 struct nfs4_fs_locations *locations,
6327 struct page *page, struct rpc_cred *cred)
6329 struct nfs_server *server = NFS_SERVER(inode);
6330 struct rpc_clnt *clnt = server->client;
6332 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6334 struct nfs4_fs_locations_arg args = {
6335 .fh = NFS_FH(inode),
6338 .migration = 1, /* skip LOOKUP */
6340 struct nfs4_fs_locations_res res = {
6341 .fs_locations = locations,
6344 struct rpc_message msg = {
6345 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6352 nfs_fattr_init(&locations->fattr);
6353 locations->server = server;
6354 locations->nlocations = 0;
6356 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6357 nfs4_set_sequence_privileged(&args.seq_args);
6358 status = nfs4_call_sync_sequence(clnt, server, &msg,
6359 &args.seq_args, &res.seq_res);
6360 if (status == NFS4_OK &&
6361 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6362 status = -NFS4ERR_LEASE_MOVED;
6366 #endif /* CONFIG_NFS_V4_1 */
6369 * nfs4_proc_get_locations - discover locations for a migrated FSID
6370 * @inode: inode on FSID that is migrating
6371 * @locations: result of query
6373 * @cred: credential to use for this operation
6375 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6376 * operation failed, or a negative errno if a local error occurred.
6378 * On success, "locations" is filled in, but if the server has
6379 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6382 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6383 * from this client that require migration recovery.
6385 int nfs4_proc_get_locations(struct inode *inode,
6386 struct nfs4_fs_locations *locations,
6387 struct page *page, struct rpc_cred *cred)
6389 struct nfs_server *server = NFS_SERVER(inode);
6390 struct nfs_client *clp = server->nfs_client;
6391 const struct nfs4_mig_recovery_ops *ops =
6392 clp->cl_mvops->mig_recovery_ops;
6393 struct nfs4_exception exception = { };
6396 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6397 (unsigned long long)server->fsid.major,
6398 (unsigned long long)server->fsid.minor,
6400 nfs_display_fhandle(NFS_FH(inode), __func__);
6403 status = ops->get_locations(inode, locations, page, cred);
6404 if (status != -NFS4ERR_DELAY)
6406 nfs4_handle_exception(server, status, &exception);
6407 } while (exception.retry);
6412 * This operation also signals the server that this client is
6413 * performing "lease moved" recovery. The server can stop
6414 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6415 * is appended to this compound to identify the client ID which is
6416 * performing recovery.
6418 static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6420 struct nfs_server *server = NFS_SERVER(inode);
6421 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6422 struct rpc_clnt *clnt = server->client;
6423 struct nfs4_fsid_present_arg args = {
6424 .fh = NFS_FH(inode),
6425 .clientid = clp->cl_clientid,
6426 .renew = 1, /* append RENEW */
6428 struct nfs4_fsid_present_res res = {
6431 struct rpc_message msg = {
6432 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6437 unsigned long now = jiffies;
6440 res.fh = nfs_alloc_fhandle();
6444 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6445 nfs4_set_sequence_privileged(&args.seq_args);
6446 status = nfs4_call_sync_sequence(clnt, server, &msg,
6447 &args.seq_args, &res.seq_res);
6448 nfs_free_fhandle(res.fh);
6452 do_renew_lease(clp, now);
6456 #ifdef CONFIG_NFS_V4_1
6459 * This operation also signals the server that this client is
6460 * performing "lease moved" recovery. The server can stop asserting
6461 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6462 * this operation is identified in the SEQUENCE operation in this
6465 static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6467 struct nfs_server *server = NFS_SERVER(inode);
6468 struct rpc_clnt *clnt = server->client;
6469 struct nfs4_fsid_present_arg args = {
6470 .fh = NFS_FH(inode),
6472 struct nfs4_fsid_present_res res = {
6474 struct rpc_message msg = {
6475 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6482 res.fh = nfs_alloc_fhandle();
6486 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6487 nfs4_set_sequence_privileged(&args.seq_args);
6488 status = nfs4_call_sync_sequence(clnt, server, &msg,
6489 &args.seq_args, &res.seq_res);
6490 nfs_free_fhandle(res.fh);
6491 if (status == NFS4_OK &&
6492 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6493 status = -NFS4ERR_LEASE_MOVED;
6497 #endif /* CONFIG_NFS_V4_1 */
6500 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6501 * @inode: inode on FSID to check
6502 * @cred: credential to use for this operation
6504 * Server indicates whether the FSID is present, moved, or not
6505 * recognized. This operation is necessary to clear a LEASE_MOVED
6506 * condition for this client ID.
6508 * Returns NFS4_OK if the FSID is present on this server,
6509 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6510 * NFS4ERR code if some error occurred on the server, or a
6511 * negative errno if a local failure occurred.
6513 int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6515 struct nfs_server *server = NFS_SERVER(inode);
6516 struct nfs_client *clp = server->nfs_client;
6517 const struct nfs4_mig_recovery_ops *ops =
6518 clp->cl_mvops->mig_recovery_ops;
6519 struct nfs4_exception exception = { };
6522 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6523 (unsigned long long)server->fsid.major,
6524 (unsigned long long)server->fsid.minor,
6526 nfs_display_fhandle(NFS_FH(inode), __func__);
6529 status = ops->fsid_present(inode, cred);
6530 if (status != -NFS4ERR_DELAY)
6532 nfs4_handle_exception(server, status, &exception);
6533 } while (exception.retry);
6538 * If 'use_integrity' is true and the state managment nfs_client
6539 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6540 * and the machine credential as per RFC3530bis and RFC5661 Security
6541 * Considerations sections. Otherwise, just use the user cred with the
6542 * filesystem's rpc_client.
6544 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
6547 struct nfs4_secinfo_arg args = {
6548 .dir_fh = NFS_FH(dir),
6551 struct nfs4_secinfo_res res = {
6554 struct rpc_message msg = {
6555 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6559 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
6560 struct rpc_cred *cred = NULL;
6562 if (use_integrity) {
6563 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
6564 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6565 msg.rpc_cred = cred;
6568 dprintk("NFS call secinfo %s\n", name->name);
6570 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6571 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6573 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6575 dprintk("NFS reply secinfo: %d\n", status);
6583 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6584 struct nfs4_secinfo_flavors *flavors)
6586 struct nfs4_exception exception = { };
6589 err = -NFS4ERR_WRONGSEC;
6591 /* try to use integrity protection with machine cred */
6592 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6593 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6596 * if unable to use integrity protection, or SECINFO with
6597 * integrity protection returns NFS4ERR_WRONGSEC (which is
6598 * disallowed by spec, but exists in deployed servers) use
6599 * the current filesystem's rpc_client and the user cred.
6601 if (err == -NFS4ERR_WRONGSEC)
6602 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6604 trace_nfs4_secinfo(dir, name, err);
6605 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6607 } while (exception.retry);
6611 #ifdef CONFIG_NFS_V4_1
6613 * Check the exchange flags returned by the server for invalid flags, having
6614 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6617 static int nfs4_check_cl_exchange_flags(u32 flags)
6619 if (flags & ~EXCHGID4_FLAG_MASK_R)
6621 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6622 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6624 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6628 return -NFS4ERR_INVAL;
6632 nfs41_same_server_scope(struct nfs41_server_scope *a,
6633 struct nfs41_server_scope *b)
6635 if (a->server_scope_sz == b->server_scope_sz &&
6636 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6643 * nfs4_proc_bind_conn_to_session()
6645 * The 4.1 client currently uses the same TCP connection for the
6646 * fore and backchannel.
6648 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
6651 struct nfs41_bind_conn_to_session_args args = {
6653 .dir = NFS4_CDFC4_FORE_OR_BOTH,
6655 struct nfs41_bind_conn_to_session_res res;
6656 struct rpc_message msg = {
6658 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6664 dprintk("--> %s\n", __func__);
6666 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
6667 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
6668 args.dir = NFS4_CDFC4_FORE;
6670 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6671 trace_nfs4_bind_conn_to_session(clp, status);
6673 if (memcmp(res.sessionid.data,
6674 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6675 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6679 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
6680 dprintk("NFS: %s: Unexpected direction from server\n",
6685 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
6686 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6693 dprintk("<-- %s status= %d\n", __func__, status);
6698 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6699 * and operations we'd like to see to enable certain features in the allow map
6701 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6702 .how = SP4_MACH_CRED,
6703 .enforce.u.words = {
6704 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6705 1 << (OP_EXCHANGE_ID - 32) |
6706 1 << (OP_CREATE_SESSION - 32) |
6707 1 << (OP_DESTROY_SESSION - 32) |
6708 1 << (OP_DESTROY_CLIENTID - 32)
6711 [0] = 1 << (OP_CLOSE) |
6714 [1] = 1 << (OP_SECINFO - 32) |
6715 1 << (OP_SECINFO_NO_NAME - 32) |
6716 1 << (OP_TEST_STATEID - 32) |
6717 1 << (OP_FREE_STATEID - 32) |
6718 1 << (OP_WRITE - 32)
6723 * Select the state protection mode for client `clp' given the server results
6724 * from exchange_id in `sp'.
6726 * Returns 0 on success, negative errno otherwise.
6728 static int nfs4_sp4_select_mode(struct nfs_client *clp,
6729 struct nfs41_state_protection *sp)
6731 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6732 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6733 1 << (OP_EXCHANGE_ID - 32) |
6734 1 << (OP_CREATE_SESSION - 32) |
6735 1 << (OP_DESTROY_SESSION - 32) |
6736 1 << (OP_DESTROY_CLIENTID - 32)
6740 if (sp->how == SP4_MACH_CRED) {
6741 /* Print state protect result */
6742 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6743 for (i = 0; i <= LAST_NFS4_OP; i++) {
6744 if (test_bit(i, sp->enforce.u.longs))
6745 dfprintk(MOUNT, " enforce op %d\n", i);
6746 if (test_bit(i, sp->allow.u.longs))
6747 dfprintk(MOUNT, " allow op %d\n", i);
6750 /* make sure nothing is on enforce list that isn't supported */
6751 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6752 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6753 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6759 * Minimal mode - state operations are allowed to use machine
6760 * credential. Note this already happens by default, so the
6761 * client doesn't have to do anything more than the negotiation.
6763 * NOTE: we don't care if EXCHANGE_ID is in the list -
6764 * we're already using the machine cred for exchange_id
6765 * and will never use a different cred.
6767 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6768 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6769 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6770 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6771 dfprintk(MOUNT, "sp4_mach_cred:\n");
6772 dfprintk(MOUNT, " minimal mode enabled\n");
6773 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6775 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6779 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6780 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6781 dfprintk(MOUNT, " cleanup mode enabled\n");
6782 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6785 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6786 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6787 dfprintk(MOUNT, " secinfo mode enabled\n");
6788 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6791 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6792 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6793 dfprintk(MOUNT, " stateid mode enabled\n");
6794 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6797 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6798 dfprintk(MOUNT, " write mode enabled\n");
6799 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6802 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6803 dfprintk(MOUNT, " commit mode enabled\n");
6804 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6812 * _nfs4_proc_exchange_id()
6814 * Wrapper for EXCHANGE_ID operation.
6816 static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6819 nfs4_verifier verifier;
6820 struct nfs41_exchange_id_args args = {
6821 .verifier = &verifier,
6823 #ifdef CONFIG_NFS_V4_1_MIGRATION
6824 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6825 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6826 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6828 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6829 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6832 struct nfs41_exchange_id_res res = {
6836 struct rpc_message msg = {
6837 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6843 nfs4_init_boot_verifier(clp, &verifier);
6844 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6846 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6847 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6848 args.id_len, args.id);
6850 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
6852 if (unlikely(res.server_owner == NULL)) {
6857 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
6859 if (unlikely(res.server_scope == NULL)) {
6861 goto out_server_owner;
6864 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
6865 if (unlikely(res.impl_id == NULL)) {
6867 goto out_server_scope;
6872 args.state_protect.how = SP4_NONE;
6876 args.state_protect = nfs4_sp4_mach_cred_request;
6883 goto out_server_scope;
6886 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6887 trace_nfs4_exchange_id(clp, status);
6889 status = nfs4_check_cl_exchange_flags(res.flags);
6892 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6895 clp->cl_clientid = res.clientid;
6896 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6897 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6898 clp->cl_seqid = res.seqid;
6900 kfree(clp->cl_serverowner);
6901 clp->cl_serverowner = res.server_owner;
6902 res.server_owner = NULL;
6904 /* use the most recent implementation id */
6905 kfree(clp->cl_implid);
6906 clp->cl_implid = res.impl_id;
6908 if (clp->cl_serverscope != NULL &&
6909 !nfs41_same_server_scope(clp->cl_serverscope,
6910 res.server_scope)) {
6911 dprintk("%s: server_scope mismatch detected\n",
6913 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
6914 kfree(clp->cl_serverscope);
6915 clp->cl_serverscope = NULL;
6918 if (clp->cl_serverscope == NULL) {
6919 clp->cl_serverscope = res.server_scope;
6926 kfree(res.server_owner);
6928 kfree(res.server_scope);
6930 if (clp->cl_implid != NULL)
6931 dprintk("NFS reply exchange_id: Server Implementation ID: "
6932 "domain: %s, name: %s, date: %llu,%u\n",
6933 clp->cl_implid->domain, clp->cl_implid->name,
6934 clp->cl_implid->date.seconds,
6935 clp->cl_implid->date.nseconds);
6936 dprintk("NFS reply exchange_id: %d\n", status);
6941 * nfs4_proc_exchange_id()
6943 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6945 * Since the clientid has expired, all compounds using sessions
6946 * associated with the stale clientid will be returning
6947 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6948 * be in some phase of session reset.
6950 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6952 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6954 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6957 /* try SP4_MACH_CRED if krb5i/p */
6958 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6959 authflavor == RPC_AUTH_GSS_KRB5P) {
6960 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6966 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6969 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6970 struct rpc_cred *cred)
6972 struct rpc_message msg = {
6973 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6979 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6980 trace_nfs4_destroy_clientid(clp, status);
6982 dprintk("NFS: Got error %d from the server %s on "
6983 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6987 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6988 struct rpc_cred *cred)
6993 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6994 ret = _nfs4_proc_destroy_clientid(clp, cred);
6996 case -NFS4ERR_DELAY:
6997 case -NFS4ERR_CLIENTID_BUSY:
7007 int nfs4_destroy_clientid(struct nfs_client *clp)
7009 struct rpc_cred *cred;
7012 if (clp->cl_mvops->minor_version < 1)
7014 if (clp->cl_exchange_flags == 0)
7016 if (clp->cl_preserve_clid)
7018 cred = nfs4_get_clid_cred(clp);
7019 ret = nfs4_proc_destroy_clientid(clp, cred);
7024 case -NFS4ERR_STALE_CLIENTID:
7025 clp->cl_exchange_flags = 0;
7031 struct nfs4_get_lease_time_data {
7032 struct nfs4_get_lease_time_args *args;
7033 struct nfs4_get_lease_time_res *res;
7034 struct nfs_client *clp;
7037 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7040 struct nfs4_get_lease_time_data *data =
7041 (struct nfs4_get_lease_time_data *)calldata;
7043 dprintk("--> %s\n", __func__);
7044 /* just setup sequence, do not trigger session recovery
7045 since we're invoked within one */
7046 nfs41_setup_sequence(data->clp->cl_session,
7047 &data->args->la_seq_args,
7048 &data->res->lr_seq_res,
7050 dprintk("<-- %s\n", __func__);
7054 * Called from nfs4_state_manager thread for session setup, so don't recover
7055 * from sequence operation or clientid errors.
7057 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7059 struct nfs4_get_lease_time_data *data =
7060 (struct nfs4_get_lease_time_data *)calldata;
7062 dprintk("--> %s\n", __func__);
7063 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7065 switch (task->tk_status) {
7066 case -NFS4ERR_DELAY:
7067 case -NFS4ERR_GRACE:
7068 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7069 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7070 task->tk_status = 0;
7072 case -NFS4ERR_RETRY_UNCACHED_REP:
7073 rpc_restart_call_prepare(task);
7076 dprintk("<-- %s\n", __func__);
7079 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
7080 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7081 .rpc_call_done = nfs4_get_lease_time_done,
7084 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7086 struct rpc_task *task;
7087 struct nfs4_get_lease_time_args args;
7088 struct nfs4_get_lease_time_res res = {
7089 .lr_fsinfo = fsinfo,
7091 struct nfs4_get_lease_time_data data = {
7096 struct rpc_message msg = {
7097 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7101 struct rpc_task_setup task_setup = {
7102 .rpc_client = clp->cl_rpcclient,
7103 .rpc_message = &msg,
7104 .callback_ops = &nfs4_get_lease_time_ops,
7105 .callback_data = &data,
7106 .flags = RPC_TASK_TIMEOUT,
7110 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
7111 nfs4_set_sequence_privileged(&args.la_seq_args);
7112 dprintk("--> %s\n", __func__);
7113 task = rpc_run_task(&task_setup);
7116 status = PTR_ERR(task);
7118 status = task->tk_status;
7121 dprintk("<-- %s return %d\n", __func__, status);
7127 * Initialize the values to be used by the client in CREATE_SESSION
7128 * If nfs4_init_session set the fore channel request and response sizes,
7131 * Set the back channel max_resp_sz_cached to zero to force the client to
7132 * always set csa_cachethis to FALSE because the current implementation
7133 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7135 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7137 unsigned int max_rqst_sz, max_resp_sz;
7139 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7140 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
7142 /* Fore channel attributes */
7143 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7144 args->fc_attrs.max_resp_sz = max_resp_sz;
7145 args->fc_attrs.max_ops = NFS4_MAX_OPS;
7146 args->fc_attrs.max_reqs = max_session_slots;
7148 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
7149 "max_ops=%u max_reqs=%u\n",
7151 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
7152 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
7154 /* Back channel attributes */
7155 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7156 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7157 args->bc_attrs.max_resp_sz_cached = 0;
7158 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7159 args->bc_attrs.max_reqs = 1;
7161 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7162 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7164 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7165 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7166 args->bc_attrs.max_reqs);
7169 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7170 struct nfs41_create_session_res *res)
7172 struct nfs4_channel_attrs *sent = &args->fc_attrs;
7173 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
7175 if (rcvd->max_resp_sz > sent->max_resp_sz)
7178 * Our requested max_ops is the minimum we need; we're not
7179 * prepared to break up compounds into smaller pieces than that.
7180 * So, no point even trying to continue if the server won't
7183 if (rcvd->max_ops < sent->max_ops)
7185 if (rcvd->max_reqs == 0)
7187 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7188 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
7192 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7193 struct nfs41_create_session_res *res)
7195 struct nfs4_channel_attrs *sent = &args->bc_attrs;
7196 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
7198 if (!(res->flags & SESSION4_BACK_CHAN))
7200 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7202 if (rcvd->max_resp_sz < sent->max_resp_sz)
7204 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7206 /* These would render the backchannel useless: */
7207 if (rcvd->max_ops != sent->max_ops)
7209 if (rcvd->max_reqs != sent->max_reqs)
7215 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7216 struct nfs41_create_session_res *res)
7220 ret = nfs4_verify_fore_channel_attrs(args, res);
7223 return nfs4_verify_back_channel_attrs(args, res);
7226 static void nfs4_update_session(struct nfs4_session *session,
7227 struct nfs41_create_session_res *res)
7229 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
7230 session->flags = res->flags;
7231 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
7232 if (res->flags & SESSION4_BACK_CHAN)
7233 memcpy(&session->bc_attrs, &res->bc_attrs,
7234 sizeof(session->bc_attrs));
7237 static int _nfs4_proc_create_session(struct nfs_client *clp,
7238 struct rpc_cred *cred)
7240 struct nfs4_session *session = clp->cl_session;
7241 struct nfs41_create_session_args args = {
7243 .clientid = clp->cl_clientid,
7244 .seqid = clp->cl_seqid,
7245 .cb_program = NFS4_CALLBACK,
7247 struct nfs41_create_session_res res;
7249 struct rpc_message msg = {
7250 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7257 nfs4_init_channel_attrs(&args);
7258 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
7260 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7261 trace_nfs4_create_session(clp, status);
7264 /* Verify the session's negotiated channel_attrs values */
7265 status = nfs4_verify_channel_attrs(&args, &res);
7266 /* Increment the clientid slot sequence id */
7267 if (clp->cl_seqid == res.seqid)
7271 nfs4_update_session(session, &res);
7278 * Issues a CREATE_SESSION operation to the server.
7279 * It is the responsibility of the caller to verify the session is
7280 * expired before calling this routine.
7282 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
7286 struct nfs4_session *session = clp->cl_session;
7288 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7290 status = _nfs4_proc_create_session(clp, cred);
7294 /* Init or reset the session slot tables */
7295 status = nfs4_setup_session_slot_tables(session);
7296 dprintk("slot table setup returned %d\n", status);
7300 ptr = (unsigned *)&session->sess_id.data[0];
7301 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7302 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
7304 dprintk("<-- %s\n", __func__);
7309 * Issue the over-the-wire RPC DESTROY_SESSION.
7310 * The caller must serialize access to this routine.
7312 int nfs4_proc_destroy_session(struct nfs4_session *session,
7313 struct rpc_cred *cred)
7315 struct rpc_message msg = {
7316 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7317 .rpc_argp = session,
7322 dprintk("--> nfs4_proc_destroy_session\n");
7324 /* session is still being setup */
7325 if (session->clp->cl_cons_state != NFS_CS_READY)
7328 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7329 trace_nfs4_destroy_session(session->clp, status);
7332 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
7333 "Session has been destroyed regardless...\n", status);
7335 dprintk("<-- nfs4_proc_destroy_session\n");
7340 * Renew the cl_session lease.
7342 struct nfs4_sequence_data {
7343 struct nfs_client *clp;
7344 struct nfs4_sequence_args args;
7345 struct nfs4_sequence_res res;
7348 static void nfs41_sequence_release(void *data)
7350 struct nfs4_sequence_data *calldata = data;
7351 struct nfs_client *clp = calldata->clp;
7353 if (atomic_read(&clp->cl_count) > 1)
7354 nfs4_schedule_state_renewal(clp);
7355 nfs_put_client(clp);
7359 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7361 switch(task->tk_status) {
7362 case -NFS4ERR_DELAY:
7363 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7366 nfs4_schedule_lease_recovery(clp);
7371 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
7373 struct nfs4_sequence_data *calldata = data;
7374 struct nfs_client *clp = calldata->clp;
7376 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7379 trace_nfs4_sequence(clp, task->tk_status);
7380 if (task->tk_status < 0) {
7381 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7382 if (atomic_read(&clp->cl_count) == 1)
7385 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7386 rpc_restart_call_prepare(task);
7390 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7392 dprintk("<-- %s\n", __func__);
7395 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7397 struct nfs4_sequence_data *calldata = data;
7398 struct nfs_client *clp = calldata->clp;
7399 struct nfs4_sequence_args *args;
7400 struct nfs4_sequence_res *res;
7402 args = task->tk_msg.rpc_argp;
7403 res = task->tk_msg.rpc_resp;
7405 nfs41_setup_sequence(clp->cl_session, args, res, task);
7408 static const struct rpc_call_ops nfs41_sequence_ops = {
7409 .rpc_call_done = nfs41_sequence_call_done,
7410 .rpc_call_prepare = nfs41_sequence_prepare,
7411 .rpc_release = nfs41_sequence_release,
7414 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7415 struct rpc_cred *cred,
7418 struct nfs4_sequence_data *calldata;
7419 struct rpc_message msg = {
7420 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7423 struct rpc_task_setup task_setup_data = {
7424 .rpc_client = clp->cl_rpcclient,
7425 .rpc_message = &msg,
7426 .callback_ops = &nfs41_sequence_ops,
7427 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
7430 if (!atomic_inc_not_zero(&clp->cl_count))
7431 return ERR_PTR(-EIO);
7432 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7433 if (calldata == NULL) {
7434 nfs_put_client(clp);
7435 return ERR_PTR(-ENOMEM);
7437 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
7439 nfs4_set_sequence_privileged(&calldata->args);
7440 msg.rpc_argp = &calldata->args;
7441 msg.rpc_resp = &calldata->res;
7442 calldata->clp = clp;
7443 task_setup_data.callback_data = calldata;
7445 return rpc_run_task(&task_setup_data);
7448 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
7450 struct rpc_task *task;
7453 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
7455 task = _nfs41_proc_sequence(clp, cred, false);
7457 ret = PTR_ERR(task);
7459 rpc_put_task_async(task);
7460 dprintk("<-- %s status=%d\n", __func__, ret);
7464 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7466 struct rpc_task *task;
7469 task = _nfs41_proc_sequence(clp, cred, true);
7471 ret = PTR_ERR(task);
7474 ret = rpc_wait_for_completion_task(task);
7476 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7478 if (task->tk_status == 0)
7479 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
7480 ret = task->tk_status;
7484 dprintk("<-- %s status=%d\n", __func__, ret);
7488 struct nfs4_reclaim_complete_data {
7489 struct nfs_client *clp;
7490 struct nfs41_reclaim_complete_args arg;
7491 struct nfs41_reclaim_complete_res res;
7494 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7496 struct nfs4_reclaim_complete_data *calldata = data;
7498 nfs41_setup_sequence(calldata->clp->cl_session,
7499 &calldata->arg.seq_args,
7500 &calldata->res.seq_res,
7504 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7506 switch(task->tk_status) {
7508 case -NFS4ERR_COMPLETE_ALREADY:
7509 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7511 case -NFS4ERR_DELAY:
7512 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7514 case -NFS4ERR_RETRY_UNCACHED_REP:
7517 nfs4_schedule_lease_recovery(clp);
7522 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7524 struct nfs4_reclaim_complete_data *calldata = data;
7525 struct nfs_client *clp = calldata->clp;
7526 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7528 dprintk("--> %s\n", __func__);
7529 if (!nfs41_sequence_done(task, res))
7532 trace_nfs4_reclaim_complete(clp, task->tk_status);
7533 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7534 rpc_restart_call_prepare(task);
7537 dprintk("<-- %s\n", __func__);
7540 static void nfs4_free_reclaim_complete_data(void *data)
7542 struct nfs4_reclaim_complete_data *calldata = data;
7547 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7548 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7549 .rpc_call_done = nfs4_reclaim_complete_done,
7550 .rpc_release = nfs4_free_reclaim_complete_data,
7554 * Issue a global reclaim complete.
7556 static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7557 struct rpc_cred *cred)
7559 struct nfs4_reclaim_complete_data *calldata;
7560 struct rpc_task *task;
7561 struct rpc_message msg = {
7562 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
7565 struct rpc_task_setup task_setup_data = {
7566 .rpc_client = clp->cl_rpcclient,
7567 .rpc_message = &msg,
7568 .callback_ops = &nfs4_reclaim_complete_call_ops,
7569 .flags = RPC_TASK_ASYNC,
7571 int status = -ENOMEM;
7573 dprintk("--> %s\n", __func__);
7574 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7575 if (calldata == NULL)
7577 calldata->clp = clp;
7578 calldata->arg.one_fs = 0;
7580 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
7581 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
7582 msg.rpc_argp = &calldata->arg;
7583 msg.rpc_resp = &calldata->res;
7584 task_setup_data.callback_data = calldata;
7585 task = rpc_run_task(&task_setup_data);
7587 status = PTR_ERR(task);
7590 status = nfs4_wait_for_completion_rpc_task(task);
7592 status = task->tk_status;
7596 dprintk("<-- %s status=%d\n", __func__, status);
7601 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7603 struct nfs4_layoutget *lgp = calldata;
7604 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
7605 struct nfs4_session *session = nfs4_get_session(server);
7607 dprintk("--> %s\n", __func__);
7608 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7609 * right now covering the LAYOUTGET we are about to send.
7610 * However, that is not so catastrophic, and there seems
7611 * to be no way to prevent it completely.
7613 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
7614 &lgp->res.seq_res, task))
7616 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7617 NFS_I(lgp->args.inode)->layout,
7619 lgp->args.ctx->state)) {
7620 rpc_exit(task, NFS4_OK);
7624 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7626 struct nfs4_layoutget *lgp = calldata;
7627 struct inode *inode = lgp->args.inode;
7628 struct nfs_server *server = NFS_SERVER(inode);
7629 struct pnfs_layout_hdr *lo;
7630 struct nfs4_state *state = NULL;
7631 unsigned long timeo, now, giveup;
7633 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
7635 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
7638 switch (task->tk_status) {
7642 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7643 * (or clients) writing to the same RAID stripe
7645 case -NFS4ERR_LAYOUTTRYLATER:
7647 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7648 * existing layout before getting a new one).
7650 case -NFS4ERR_RECALLCONFLICT:
7651 timeo = rpc_get_timeout(task->tk_client);
7652 giveup = lgp->args.timestamp + timeo;
7654 if (time_after(giveup, now)) {
7655 unsigned long delay;
7658 * - Not less then NFS4_POLL_RETRY_MIN.
7659 * - One last time a jiffie before we give up
7660 * - exponential backoff (time_now minus start_attempt)
7662 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7663 min((giveup - now - 1),
7664 now - lgp->args.timestamp));
7666 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7668 rpc_delay(task, delay);
7669 task->tk_status = 0;
7670 rpc_restart_call_prepare(task);
7671 goto out; /* Do not call nfs4_async_handle_error() */
7674 case -NFS4ERR_EXPIRED:
7675 case -NFS4ERR_BAD_STATEID:
7676 spin_lock(&inode->i_lock);
7677 lo = NFS_I(inode)->layout;
7678 if (!lo || list_empty(&lo->plh_segs)) {
7679 spin_unlock(&inode->i_lock);
7680 /* If the open stateid was bad, then recover it. */
7681 state = lgp->args.ctx->state;
7686 * Mark the bad layout state as invalid, then retry
7687 * with the current stateid.
7689 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7690 spin_unlock(&inode->i_lock);
7691 pnfs_free_lseg_list(&head);
7693 task->tk_status = 0;
7694 rpc_restart_call_prepare(task);
7697 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN)
7698 rpc_restart_call_prepare(task);
7700 dprintk("<-- %s\n", __func__);
7703 static size_t max_response_pages(struct nfs_server *server)
7705 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7706 return nfs_page_array_len(0, max_resp_sz);
7709 static void nfs4_free_pages(struct page **pages, size_t size)
7716 for (i = 0; i < size; i++) {
7719 __free_page(pages[i]);
7724 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7726 struct page **pages;
7729 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7731 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7735 for (i = 0; i < size; i++) {
7736 pages[i] = alloc_page(gfp_flags);
7738 dprintk("%s: failed to allocate page\n", __func__);
7739 nfs4_free_pages(pages, size);
7747 static void nfs4_layoutget_release(void *calldata)
7749 struct nfs4_layoutget *lgp = calldata;
7750 struct inode *inode = lgp->args.inode;
7751 struct nfs_server *server = NFS_SERVER(inode);
7752 size_t max_pages = max_response_pages(server);
7754 dprintk("--> %s\n", __func__);
7755 nfs4_free_pages(lgp->args.layout.pages, max_pages);
7756 pnfs_put_layout_hdr(NFS_I(inode)->layout);
7757 put_nfs_open_context(lgp->args.ctx);
7759 dprintk("<-- %s\n", __func__);
7762 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7763 .rpc_call_prepare = nfs4_layoutget_prepare,
7764 .rpc_call_done = nfs4_layoutget_done,
7765 .rpc_release = nfs4_layoutget_release,
7768 struct pnfs_layout_segment *
7769 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
7771 struct inode *inode = lgp->args.inode;
7772 struct nfs_server *server = NFS_SERVER(inode);
7773 size_t max_pages = max_response_pages(server);
7774 struct rpc_task *task;
7775 struct rpc_message msg = {
7776 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7777 .rpc_argp = &lgp->args,
7778 .rpc_resp = &lgp->res,
7779 .rpc_cred = lgp->cred,
7781 struct rpc_task_setup task_setup_data = {
7782 .rpc_client = server->client,
7783 .rpc_message = &msg,
7784 .callback_ops = &nfs4_layoutget_call_ops,
7785 .callback_data = lgp,
7786 .flags = RPC_TASK_ASYNC,
7788 struct pnfs_layout_segment *lseg = NULL;
7791 dprintk("--> %s\n", __func__);
7793 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7794 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7796 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7797 if (!lgp->args.layout.pages) {
7798 nfs4_layoutget_release(lgp);
7799 return ERR_PTR(-ENOMEM);
7801 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
7802 lgp->args.timestamp = jiffies;
7804 lgp->res.layoutp = &lgp->args.layout;
7805 lgp->res.seq_res.sr_slot = NULL;
7806 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
7808 task = rpc_run_task(&task_setup_data);
7810 return ERR_CAST(task);
7811 status = nfs4_wait_for_completion_rpc_task(task);
7813 status = task->tk_status;
7814 trace_nfs4_layoutget(lgp->args.ctx,
7818 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7819 if (status == 0 && lgp->res.layoutp->len)
7820 lseg = pnfs_layout_process(lgp);
7822 dprintk("<-- %s status=%d\n", __func__, status);
7824 return ERR_PTR(status);
7829 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7831 struct nfs4_layoutreturn *lrp = calldata;
7833 dprintk("--> %s\n", __func__);
7834 nfs41_setup_sequence(lrp->clp->cl_session,
7835 &lrp->args.seq_args,
7840 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7842 struct nfs4_layoutreturn *lrp = calldata;
7843 struct nfs_server *server;
7845 dprintk("--> %s\n", __func__);
7847 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
7850 server = NFS_SERVER(lrp->args.inode);
7851 switch (task->tk_status) {
7853 task->tk_status = 0;
7856 case -NFS4ERR_DELAY:
7857 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
7859 rpc_restart_call_prepare(task);
7862 dprintk("<-- %s\n", __func__);
7865 static void nfs4_layoutreturn_release(void *calldata)
7867 struct nfs4_layoutreturn *lrp = calldata;
7868 struct pnfs_layout_hdr *lo = lrp->args.layout;
7870 dprintk("--> %s\n", __func__);
7871 spin_lock(&lo->plh_inode->i_lock);
7872 if (lrp->res.lrs_present)
7873 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7874 pnfs_clear_layoutreturn_waitbit(lo);
7875 clear_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE, &lo->plh_flags);
7876 rpc_wake_up(&NFS_SERVER(lo->plh_inode)->roc_rpcwaitq);
7877 lo->plh_block_lgets--;
7878 spin_unlock(&lo->plh_inode->i_lock);
7879 pnfs_put_layout_hdr(lrp->args.layout);
7880 nfs_iput_and_deactive(lrp->inode);
7882 dprintk("<-- %s\n", __func__);
7885 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7886 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7887 .rpc_call_done = nfs4_layoutreturn_done,
7888 .rpc_release = nfs4_layoutreturn_release,
7891 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
7893 struct rpc_task *task;
7894 struct rpc_message msg = {
7895 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7896 .rpc_argp = &lrp->args,
7897 .rpc_resp = &lrp->res,
7898 .rpc_cred = lrp->cred,
7900 struct rpc_task_setup task_setup_data = {
7901 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
7902 .rpc_message = &msg,
7903 .callback_ops = &nfs4_layoutreturn_call_ops,
7904 .callback_data = lrp,
7908 dprintk("--> %s\n", __func__);
7910 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
7912 nfs4_layoutreturn_release(lrp);
7915 task_setup_data.flags |= RPC_TASK_ASYNC;
7917 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
7918 task = rpc_run_task(&task_setup_data);
7920 return PTR_ERR(task);
7922 status = task->tk_status;
7923 trace_nfs4_layoutreturn(lrp->args.inode, status);
7924 dprintk("<-- %s status=%d\n", __func__, status);
7930 _nfs4_proc_getdeviceinfo(struct nfs_server *server,
7931 struct pnfs_device *pdev,
7932 struct rpc_cred *cred)
7934 struct nfs4_getdeviceinfo_args args = {
7937 struct nfs4_getdeviceinfo_res res = {
7940 struct rpc_message msg = {
7941 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7948 dprintk("--> %s\n", __func__);
7949 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
7950 dprintk("<-- %s status=%d\n", __func__, status);
7955 int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7956 struct pnfs_device *pdev,
7957 struct rpc_cred *cred)
7959 struct nfs4_exception exception = { };
7963 err = nfs4_handle_exception(server,
7964 _nfs4_proc_getdeviceinfo(server, pdev, cred),
7966 } while (exception.retry);
7969 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7971 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7973 struct nfs4_layoutcommit_data *data = calldata;
7974 struct nfs_server *server = NFS_SERVER(data->args.inode);
7975 struct nfs4_session *session = nfs4_get_session(server);
7977 nfs41_setup_sequence(session,
7978 &data->args.seq_args,
7984 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7986 struct nfs4_layoutcommit_data *data = calldata;
7987 struct nfs_server *server = NFS_SERVER(data->args.inode);
7989 if (!nfs41_sequence_done(task, &data->res.seq_res))
7992 switch (task->tk_status) { /* Just ignore these failures */
7993 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7994 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7995 case -NFS4ERR_BADLAYOUT: /* no layout */
7996 case -NFS4ERR_GRACE: /* loca_recalim always false */
7997 task->tk_status = 0;
8001 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
8002 rpc_restart_call_prepare(task);
8008 static void nfs4_layoutcommit_release(void *calldata)
8010 struct nfs4_layoutcommit_data *data = calldata;
8012 pnfs_cleanup_layoutcommit(data);
8013 nfs_post_op_update_inode_force_wcc(data->args.inode,
8015 put_rpccred(data->cred);
8016 nfs_iput_and_deactive(data->inode);
8020 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8021 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8022 .rpc_call_done = nfs4_layoutcommit_done,
8023 .rpc_release = nfs4_layoutcommit_release,
8027 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
8029 struct rpc_message msg = {
8030 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8031 .rpc_argp = &data->args,
8032 .rpc_resp = &data->res,
8033 .rpc_cred = data->cred,
8035 struct rpc_task_setup task_setup_data = {
8036 .task = &data->task,
8037 .rpc_client = NFS_CLIENT(data->args.inode),
8038 .rpc_message = &msg,
8039 .callback_ops = &nfs4_layoutcommit_ops,
8040 .callback_data = data,
8042 struct rpc_task *task;
8045 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
8046 "lbw: %llu inode %lu\n",
8047 data->task.tk_pid, sync,
8048 data->args.lastbytewritten,
8049 data->args.inode->i_ino);
8052 data->inode = nfs_igrab_and_active(data->args.inode);
8053 if (data->inode == NULL) {
8054 nfs4_layoutcommit_release(data);
8057 task_setup_data.flags = RPC_TASK_ASYNC;
8059 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
8060 task = rpc_run_task(&task_setup_data);
8062 return PTR_ERR(task);
8064 status = task->tk_status;
8065 trace_nfs4_layoutcommit(data->args.inode, status);
8066 dprintk("%s: status %d\n", __func__, status);
8072 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8073 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8076 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8077 struct nfs_fsinfo *info,
8078 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
8080 struct nfs41_secinfo_no_name_args args = {
8081 .style = SECINFO_STYLE_CURRENT_FH,
8083 struct nfs4_secinfo_res res = {
8086 struct rpc_message msg = {
8087 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8091 struct rpc_clnt *clnt = server->client;
8092 struct rpc_cred *cred = NULL;
8095 if (use_integrity) {
8096 clnt = server->nfs_client->cl_rpcclient;
8097 cred = nfs4_get_clid_cred(server->nfs_client);
8098 msg.rpc_cred = cred;
8101 dprintk("--> %s\n", __func__);
8102 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8104 dprintk("<-- %s status=%d\n", __func__, status);
8113 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8114 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8116 struct nfs4_exception exception = { };
8119 /* first try using integrity protection */
8120 err = -NFS4ERR_WRONGSEC;
8122 /* try to use integrity protection with machine cred */
8123 if (_nfs4_is_integrity_protected(server->nfs_client))
8124 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8128 * if unable to use integrity protection, or SECINFO with
8129 * integrity protection returns NFS4ERR_WRONGSEC (which is
8130 * disallowed by spec, but exists in deployed servers) use
8131 * the current filesystem's rpc_client and the user cred.
8133 if (err == -NFS4ERR_WRONGSEC)
8134 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8139 case -NFS4ERR_WRONGSEC:
8143 err = nfs4_handle_exception(server, err, &exception);
8145 } while (exception.retry);
8151 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8152 struct nfs_fsinfo *info)
8156 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
8157 struct nfs4_secinfo_flavors *flavors;
8158 struct nfs4_secinfo4 *secinfo;
8161 page = alloc_page(GFP_KERNEL);
8167 flavors = page_address(page);
8168 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8171 * Fall back on "guess and check" method if
8172 * the server doesn't support SECINFO_NO_NAME
8174 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
8175 err = nfs4_find_root_sec(server, fhandle, info);
8181 for (i = 0; i < flavors->num_flavors; i++) {
8182 secinfo = &flavors->flavors[i];
8184 switch (secinfo->flavor) {
8188 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8189 &secinfo->flavor_info);
8192 flavor = RPC_AUTH_MAXFLAVOR;
8196 if (!nfs_auth_info_match(&server->auth_info, flavor))
8197 flavor = RPC_AUTH_MAXFLAVOR;
8199 if (flavor != RPC_AUTH_MAXFLAVOR) {
8200 err = nfs4_lookup_root_sec(server, fhandle,
8207 if (flavor == RPC_AUTH_MAXFLAVOR)
8218 static int _nfs41_test_stateid(struct nfs_server *server,
8219 nfs4_stateid *stateid,
8220 struct rpc_cred *cred)
8223 struct nfs41_test_stateid_args args = {
8226 struct nfs41_test_stateid_res res;
8227 struct rpc_message msg = {
8228 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8233 struct rpc_clnt *rpc_client = server->client;
8235 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8238 dprintk("NFS call test_stateid %p\n", stateid);
8239 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8240 nfs4_set_sequence_privileged(&args.seq_args);
8241 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8242 &args.seq_args, &res.seq_res);
8243 if (status != NFS_OK) {
8244 dprintk("NFS reply test_stateid: failed, %d\n", status);
8247 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
8252 * nfs41_test_stateid - perform a TEST_STATEID operation
8254 * @server: server / transport on which to perform the operation
8255 * @stateid: state ID to test
8258 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8259 * Otherwise a negative NFS4ERR value is returned if the operation
8260 * failed or the state ID is not currently valid.
8262 static int nfs41_test_stateid(struct nfs_server *server,
8263 nfs4_stateid *stateid,
8264 struct rpc_cred *cred)
8266 struct nfs4_exception exception = { };
8269 err = _nfs41_test_stateid(server, stateid, cred);
8270 if (err != -NFS4ERR_DELAY)
8272 nfs4_handle_exception(server, err, &exception);
8273 } while (exception.retry);
8277 struct nfs_free_stateid_data {
8278 struct nfs_server *server;
8279 struct nfs41_free_stateid_args args;
8280 struct nfs41_free_stateid_res res;
8283 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8285 struct nfs_free_stateid_data *data = calldata;
8286 nfs41_setup_sequence(nfs4_get_session(data->server),
8287 &data->args.seq_args,
8292 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8294 struct nfs_free_stateid_data *data = calldata;
8296 nfs41_sequence_done(task, &data->res.seq_res);
8298 switch (task->tk_status) {
8299 case -NFS4ERR_DELAY:
8300 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
8301 rpc_restart_call_prepare(task);
8305 static void nfs41_free_stateid_release(void *calldata)
8310 static const struct rpc_call_ops nfs41_free_stateid_ops = {
8311 .rpc_call_prepare = nfs41_free_stateid_prepare,
8312 .rpc_call_done = nfs41_free_stateid_done,
8313 .rpc_release = nfs41_free_stateid_release,
8316 static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8317 nfs4_stateid *stateid,
8318 struct rpc_cred *cred,
8321 struct rpc_message msg = {
8322 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
8325 struct rpc_task_setup task_setup = {
8326 .rpc_client = server->client,
8327 .rpc_message = &msg,
8328 .callback_ops = &nfs41_free_stateid_ops,
8329 .flags = RPC_TASK_ASYNC,
8331 struct nfs_free_stateid_data *data;
8333 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8334 &task_setup.rpc_client, &msg);
8336 dprintk("NFS call free_stateid %p\n", stateid);
8337 data = kmalloc(sizeof(*data), GFP_NOFS);
8339 return ERR_PTR(-ENOMEM);
8340 data->server = server;
8341 nfs4_stateid_copy(&data->args.stateid, stateid);
8343 task_setup.callback_data = data;
8345 msg.rpc_argp = &data->args;
8346 msg.rpc_resp = &data->res;
8347 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
8349 nfs4_set_sequence_privileged(&data->args.seq_args);
8351 return rpc_run_task(&task_setup);
8355 * nfs41_free_stateid - perform a FREE_STATEID operation
8357 * @server: server / transport on which to perform the operation
8358 * @stateid: state ID to release
8361 * Returns NFS_OK if the server freed "stateid". Otherwise a
8362 * negative NFS4ERR value is returned.
8364 static int nfs41_free_stateid(struct nfs_server *server,
8365 nfs4_stateid *stateid,
8366 struct rpc_cred *cred)
8368 struct rpc_task *task;
8371 task = _nfs41_free_stateid(server, stateid, cred, true);
8373 return PTR_ERR(task);
8374 ret = rpc_wait_for_completion_task(task);
8376 ret = task->tk_status;
8382 nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
8384 struct rpc_task *task;
8385 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
8387 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
8388 nfs4_free_lock_state(server, lsp);
8394 static bool nfs41_match_stateid(const nfs4_stateid *s1,
8395 const nfs4_stateid *s2)
8397 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
8400 if (s1->seqid == s2->seqid)
8402 if (s1->seqid == 0 || s2->seqid == 0)
8408 #endif /* CONFIG_NFS_V4_1 */
8410 static bool nfs4_match_stateid(const nfs4_stateid *s1,
8411 const nfs4_stateid *s2)
8413 return nfs4_stateid_match(s1, s2);
8417 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
8418 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8419 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8420 .recover_open = nfs4_open_reclaim,
8421 .recover_lock = nfs4_lock_reclaim,
8422 .establish_clid = nfs4_init_clientid,
8423 .detect_trunking = nfs40_discover_server_trunking,
8426 #if defined(CONFIG_NFS_V4_1)
8427 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
8428 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8429 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8430 .recover_open = nfs4_open_reclaim,
8431 .recover_lock = nfs4_lock_reclaim,
8432 .establish_clid = nfs41_init_clientid,
8433 .reclaim_complete = nfs41_proc_reclaim_complete,
8434 .detect_trunking = nfs41_discover_server_trunking,
8436 #endif /* CONFIG_NFS_V4_1 */
8438 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
8439 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8440 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8441 .recover_open = nfs40_open_expired,
8442 .recover_lock = nfs4_lock_expired,
8443 .establish_clid = nfs4_init_clientid,
8446 #if defined(CONFIG_NFS_V4_1)
8447 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
8448 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8449 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8450 .recover_open = nfs41_open_expired,
8451 .recover_lock = nfs41_lock_expired,
8452 .establish_clid = nfs41_init_clientid,
8454 #endif /* CONFIG_NFS_V4_1 */
8456 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
8457 .sched_state_renewal = nfs4_proc_async_renew,
8458 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8459 .renew_lease = nfs4_proc_renew,
8462 #if defined(CONFIG_NFS_V4_1)
8463 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
8464 .sched_state_renewal = nfs41_proc_async_sequence,
8465 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8466 .renew_lease = nfs4_proc_sequence,
8470 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
8471 .get_locations = _nfs40_proc_get_locations,
8472 .fsid_present = _nfs40_proc_fsid_present,
8475 #if defined(CONFIG_NFS_V4_1)
8476 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
8477 .get_locations = _nfs41_proc_get_locations,
8478 .fsid_present = _nfs41_proc_fsid_present,
8480 #endif /* CONFIG_NFS_V4_1 */
8482 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8484 .init_caps = NFS_CAP_READDIRPLUS
8485 | NFS_CAP_ATOMIC_OPEN
8486 | NFS_CAP_CHANGE_ATTR
8487 | NFS_CAP_POSIX_LOCK,
8488 .init_client = nfs40_init_client,
8489 .shutdown_client = nfs40_shutdown_client,
8490 .match_stateid = nfs4_match_stateid,
8491 .find_root_sec = nfs4_find_root_sec,
8492 .free_lock_state = nfs4_release_lockowner,
8493 .alloc_seqid = nfs_alloc_seqid,
8494 .call_sync_ops = &nfs40_call_sync_ops,
8495 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8496 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8497 .state_renewal_ops = &nfs40_state_renewal_ops,
8498 .mig_recovery_ops = &nfs40_mig_recovery_ops,
8501 #if defined(CONFIG_NFS_V4_1)
8502 static struct nfs_seqid *
8503 nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8508 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8510 .init_caps = NFS_CAP_READDIRPLUS
8511 | NFS_CAP_ATOMIC_OPEN
8512 | NFS_CAP_CHANGE_ATTR
8513 | NFS_CAP_POSIX_LOCK
8514 | NFS_CAP_STATEID_NFSV41
8515 | NFS_CAP_ATOMIC_OPEN_V1,
8516 .init_client = nfs41_init_client,
8517 .shutdown_client = nfs41_shutdown_client,
8518 .match_stateid = nfs41_match_stateid,
8519 .find_root_sec = nfs41_find_root_sec,
8520 .free_lock_state = nfs41_free_lock_state,
8521 .alloc_seqid = nfs_alloc_no_seqid,
8522 .call_sync_ops = &nfs41_call_sync_ops,
8523 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8524 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8525 .state_renewal_ops = &nfs41_state_renewal_ops,
8526 .mig_recovery_ops = &nfs41_mig_recovery_ops,
8530 #if defined(CONFIG_NFS_V4_2)
8531 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8533 .init_caps = NFS_CAP_READDIRPLUS
8534 | NFS_CAP_ATOMIC_OPEN
8535 | NFS_CAP_CHANGE_ATTR
8536 | NFS_CAP_POSIX_LOCK
8537 | NFS_CAP_STATEID_NFSV41
8538 | NFS_CAP_ATOMIC_OPEN_V1
8540 | NFS_CAP_DEALLOCATE
8542 .init_client = nfs41_init_client,
8543 .shutdown_client = nfs41_shutdown_client,
8544 .match_stateid = nfs41_match_stateid,
8545 .find_root_sec = nfs41_find_root_sec,
8546 .free_lock_state = nfs41_free_lock_state,
8547 .call_sync_ops = &nfs41_call_sync_ops,
8548 .alloc_seqid = nfs_alloc_no_seqid,
8549 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8550 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8551 .state_renewal_ops = &nfs41_state_renewal_ops,
8555 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8556 [0] = &nfs_v4_0_minor_ops,
8557 #if defined(CONFIG_NFS_V4_1)
8558 [1] = &nfs_v4_1_minor_ops,
8560 #if defined(CONFIG_NFS_V4_2)
8561 [2] = &nfs_v4_2_minor_ops,
8565 static const struct inode_operations nfs4_dir_inode_operations = {
8566 .create = nfs_create,
8567 .lookup = nfs_lookup,
8568 .atomic_open = nfs_atomic_open,
8570 .unlink = nfs_unlink,
8571 .symlink = nfs_symlink,
8575 .rename = nfs_rename,
8576 .permission = nfs_permission,
8577 .getattr = nfs_getattr,
8578 .setattr = nfs_setattr,
8579 .getxattr = generic_getxattr,
8580 .setxattr = generic_setxattr,
8581 .listxattr = generic_listxattr,
8582 .removexattr = generic_removexattr,
8585 static const struct inode_operations nfs4_file_inode_operations = {
8586 .permission = nfs_permission,
8587 .getattr = nfs_getattr,
8588 .setattr = nfs_setattr,
8589 .getxattr = generic_getxattr,
8590 .setxattr = generic_setxattr,
8591 .listxattr = generic_listxattr,
8592 .removexattr = generic_removexattr,
8595 const struct nfs_rpc_ops nfs_v4_clientops = {
8596 .version = 4, /* protocol version */
8597 .dentry_ops = &nfs4_dentry_operations,
8598 .dir_inode_ops = &nfs4_dir_inode_operations,
8599 .file_inode_ops = &nfs4_file_inode_operations,
8600 .file_ops = &nfs4_file_operations,
8601 .getroot = nfs4_proc_get_root,
8602 .submount = nfs4_submount,
8603 .try_mount = nfs4_try_mount,
8604 .getattr = nfs4_proc_getattr,
8605 .setattr = nfs4_proc_setattr,
8606 .lookup = nfs4_proc_lookup,
8607 .access = nfs4_proc_access,
8608 .readlink = nfs4_proc_readlink,
8609 .create = nfs4_proc_create,
8610 .remove = nfs4_proc_remove,
8611 .unlink_setup = nfs4_proc_unlink_setup,
8612 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
8613 .unlink_done = nfs4_proc_unlink_done,
8614 .rename_setup = nfs4_proc_rename_setup,
8615 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
8616 .rename_done = nfs4_proc_rename_done,
8617 .link = nfs4_proc_link,
8618 .symlink = nfs4_proc_symlink,
8619 .mkdir = nfs4_proc_mkdir,
8620 .rmdir = nfs4_proc_remove,
8621 .readdir = nfs4_proc_readdir,
8622 .mknod = nfs4_proc_mknod,
8623 .statfs = nfs4_proc_statfs,
8624 .fsinfo = nfs4_proc_fsinfo,
8625 .pathconf = nfs4_proc_pathconf,
8626 .set_capabilities = nfs4_server_capabilities,
8627 .decode_dirent = nfs4_decode_dirent,
8628 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
8629 .read_setup = nfs4_proc_read_setup,
8630 .read_done = nfs4_read_done,
8631 .write_setup = nfs4_proc_write_setup,
8632 .write_done = nfs4_write_done,
8633 .commit_setup = nfs4_proc_commit_setup,
8634 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
8635 .commit_done = nfs4_commit_done,
8636 .lock = nfs4_proc_lock,
8637 .clear_acl_cache = nfs4_zap_acl_attr,
8638 .close_context = nfs4_close_context,
8639 .open_context = nfs4_atomic_open,
8640 .have_delegation = nfs4_have_delegation,
8641 .return_delegation = nfs4_inode_return_delegation,
8642 .alloc_client = nfs4_alloc_client,
8643 .init_client = nfs4_init_client,
8644 .free_client = nfs4_free_client,
8645 .create_server = nfs4_create_server,
8646 .clone_server = nfs_clone_server,
8649 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8650 .prefix = XATTR_NAME_NFSV4_ACL,
8651 .list = nfs4_xattr_list_nfs4_acl,
8652 .get = nfs4_xattr_get_nfs4_acl,
8653 .set = nfs4_xattr_set_nfs4_acl,
8656 const struct xattr_handler *nfs4_xattr_handlers[] = {
8657 &nfs4_xattr_nfs4_acl_handler,
8658 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
8659 &nfs4_xattr_nfs4_label_handler,