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 static int nfs40_setup_sequence(const struct nfs_server *server,
499 struct nfs4_sequence_args *args,
500 struct nfs4_sequence_res *res,
501 struct rpc_task *task)
503 struct nfs4_slot_table *tbl = server->nfs_client->cl_slot_tbl;
504 struct nfs4_slot *slot;
506 /* slot already allocated? */
507 if (res->sr_slot != NULL)
510 spin_lock(&tbl->slot_tbl_lock);
511 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
514 slot = nfs4_alloc_slot(tbl);
516 if (slot == ERR_PTR(-ENOMEM))
517 task->tk_timeout = HZ >> 2;
520 spin_unlock(&tbl->slot_tbl_lock);
522 args->sa_slot = slot;
526 rpc_call_start(task);
530 if (args->sa_privileged)
531 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
532 NULL, RPC_PRIORITY_PRIVILEGED);
534 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
535 spin_unlock(&tbl->slot_tbl_lock);
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 static int nfs4_sequence_done(struct rpc_task *task,
698 struct nfs4_sequence_res *res)
700 if (res->sr_slot == NULL)
702 if (!res->sr_slot->table->session)
703 return nfs40_sequence_done(task, res);
704 return nfs41_sequence_done(task, res);
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, args, res, task);
782 dprintk("--> %s clp %p session %p sr_slot %u\n",
783 __func__, session->clp, session, res->sr_slot ?
784 res->sr_slot->slot_nr : NFS4_NO_SLOT);
786 ret = nfs41_setup_sequence(session, args, res, task);
788 dprintk("<-- %s status=%d\n", __func__, ret);
792 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
794 struct nfs4_call_sync_data *data = calldata;
795 struct nfs4_session *session = nfs4_get_session(data->seq_server);
797 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
799 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
802 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
804 struct nfs4_call_sync_data *data = calldata;
806 nfs41_sequence_done(task, data->seq_res);
809 static const struct rpc_call_ops nfs41_call_sync_ops = {
810 .rpc_call_prepare = nfs41_call_sync_prepare,
811 .rpc_call_done = nfs41_call_sync_done,
814 #else /* !CONFIG_NFS_V4_1 */
816 static int nfs4_setup_sequence(const struct nfs_server *server,
817 struct nfs4_sequence_args *args,
818 struct nfs4_sequence_res *res,
819 struct rpc_task *task)
821 return nfs40_setup_sequence(server, args, res, task);
824 static int nfs4_sequence_done(struct rpc_task *task,
825 struct nfs4_sequence_res *res)
827 return nfs40_sequence_done(task, res);
830 #endif /* !CONFIG_NFS_V4_1 */
832 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
834 struct nfs4_call_sync_data *data = calldata;
835 nfs4_setup_sequence(data->seq_server,
836 data->seq_args, data->seq_res, task);
839 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
841 struct nfs4_call_sync_data *data = calldata;
842 nfs4_sequence_done(task, data->seq_res);
845 static const struct rpc_call_ops nfs40_call_sync_ops = {
846 .rpc_call_prepare = nfs40_call_sync_prepare,
847 .rpc_call_done = nfs40_call_sync_done,
850 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
851 struct nfs_server *server,
852 struct rpc_message *msg,
853 struct nfs4_sequence_args *args,
854 struct nfs4_sequence_res *res)
857 struct rpc_task *task;
858 struct nfs_client *clp = server->nfs_client;
859 struct nfs4_call_sync_data data = {
860 .seq_server = server,
864 struct rpc_task_setup task_setup = {
867 .callback_ops = clp->cl_mvops->call_sync_ops,
868 .callback_data = &data
871 task = rpc_run_task(&task_setup);
875 ret = task->tk_status;
881 int nfs4_call_sync(struct rpc_clnt *clnt,
882 struct nfs_server *server,
883 struct rpc_message *msg,
884 struct nfs4_sequence_args *args,
885 struct nfs4_sequence_res *res,
888 nfs4_init_sequence(args, res, cache_reply);
889 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
892 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
894 struct nfs_inode *nfsi = NFS_I(dir);
896 spin_lock(&dir->i_lock);
897 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
898 if (!cinfo->atomic || cinfo->before != dir->i_version)
899 nfs_force_lookup_revalidate(dir);
900 dir->i_version = cinfo->after;
901 nfs_fscache_invalidate(dir);
902 spin_unlock(&dir->i_lock);
905 struct nfs4_opendata {
907 struct nfs_openargs o_arg;
908 struct nfs_openres o_res;
909 struct nfs_open_confirmargs c_arg;
910 struct nfs_open_confirmres c_res;
911 struct nfs4_string owner_name;
912 struct nfs4_string group_name;
913 struct nfs_fattr f_attr;
914 struct nfs4_label *f_label;
916 struct dentry *dentry;
917 struct nfs4_state_owner *owner;
918 struct nfs4_state *state;
920 unsigned long timestamp;
921 unsigned int rpc_done : 1;
922 unsigned int file_created : 1;
923 unsigned int is_recover : 1;
928 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
929 int err, struct nfs4_exception *exception)
933 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
935 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
936 exception->retry = 1;
940 static enum open_claim_type4
941 nfs4_map_atomic_open_claim(struct nfs_server *server,
942 enum open_claim_type4 claim)
944 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
949 case NFS4_OPEN_CLAIM_FH:
950 return NFS4_OPEN_CLAIM_NULL;
951 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
952 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
953 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
954 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
958 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
960 p->o_res.f_attr = &p->f_attr;
961 p->o_res.f_label = p->f_label;
962 p->o_res.seqid = p->o_arg.seqid;
963 p->c_res.seqid = p->c_arg.seqid;
964 p->o_res.server = p->o_arg.server;
965 p->o_res.access_request = p->o_arg.access;
966 nfs_fattr_init(&p->f_attr);
967 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
970 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
971 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
972 const struct iattr *attrs,
973 struct nfs4_label *label,
974 enum open_claim_type4 claim,
977 struct dentry *parent = dget_parent(dentry);
978 struct inode *dir = parent->d_inode;
979 struct nfs_server *server = NFS_SERVER(dir);
980 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
981 struct nfs4_opendata *p;
983 p = kzalloc(sizeof(*p), gfp_mask);
987 p->f_label = nfs4_label_alloc(server, gfp_mask);
988 if (IS_ERR(p->f_label))
991 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
992 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
993 if (IS_ERR(p->o_arg.seqid))
995 nfs_sb_active(dentry->d_sb);
996 p->dentry = dget(dentry);
999 atomic_inc(&sp->so_count);
1000 p->o_arg.open_flags = flags;
1001 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
1002 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1003 * will return permission denied for all bits until close */
1004 if (!(flags & O_EXCL)) {
1005 /* ask server to check for all possible rights as results
1007 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1008 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
1010 p->o_arg.clientid = server->nfs_client->cl_clientid;
1011 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1012 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
1013 p->o_arg.name = &dentry->d_name;
1014 p->o_arg.server = server;
1015 p->o_arg.bitmask = nfs4_bitmask(server, label);
1016 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1017 p->o_arg.label = label;
1018 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1019 switch (p->o_arg.claim) {
1020 case NFS4_OPEN_CLAIM_NULL:
1021 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1022 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1023 p->o_arg.fh = NFS_FH(dir);
1025 case NFS4_OPEN_CLAIM_PREVIOUS:
1026 case NFS4_OPEN_CLAIM_FH:
1027 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1028 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1029 p->o_arg.fh = NFS_FH(dentry->d_inode);
1031 if (attrs != NULL && attrs->ia_valid != 0) {
1034 p->o_arg.u.attrs = &p->attrs;
1035 memcpy(&p->attrs, attrs, sizeof(p->attrs));
1038 verf[1] = current->pid;
1039 memcpy(p->o_arg.u.verifier.data, verf,
1040 sizeof(p->o_arg.u.verifier.data));
1042 p->c_arg.fh = &p->o_res.fh;
1043 p->c_arg.stateid = &p->o_res.stateid;
1044 p->c_arg.seqid = p->o_arg.seqid;
1045 nfs4_init_opendata_res(p);
1046 kref_init(&p->kref);
1050 nfs4_label_free(p->f_label);
1058 static void nfs4_opendata_free(struct kref *kref)
1060 struct nfs4_opendata *p = container_of(kref,
1061 struct nfs4_opendata, kref);
1062 struct super_block *sb = p->dentry->d_sb;
1064 nfs_free_seqid(p->o_arg.seqid);
1065 if (p->state != NULL)
1066 nfs4_put_open_state(p->state);
1067 nfs4_put_state_owner(p->owner);
1069 nfs4_label_free(p->f_label);
1073 nfs_sb_deactive(sb);
1074 nfs_fattr_free_names(&p->f_attr);
1075 kfree(p->f_attr.mdsthreshold);
1079 static void nfs4_opendata_put(struct nfs4_opendata *p)
1082 kref_put(&p->kref, nfs4_opendata_free);
1085 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1089 ret = rpc_wait_for_completion_task(task);
1093 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
1097 if (open_mode & (O_EXCL|O_TRUNC))
1099 switch (mode & (FMODE_READ|FMODE_WRITE)) {
1101 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1102 && state->n_rdonly != 0;
1105 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1106 && state->n_wronly != 0;
1108 case FMODE_READ|FMODE_WRITE:
1109 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1110 && state->n_rdwr != 0;
1116 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
1118 if (delegation == NULL)
1120 if ((delegation->type & fmode) != fmode)
1122 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1124 nfs_mark_delegation_referenced(delegation);
1128 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
1137 case FMODE_READ|FMODE_WRITE:
1140 nfs4_state_set_mode_locked(state, state->state | fmode);
1143 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1145 struct nfs_client *clp = state->owner->so_server->nfs_client;
1146 bool need_recover = false;
1148 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1149 need_recover = true;
1150 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1151 need_recover = true;
1152 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1153 need_recover = true;
1155 nfs4_state_mark_reclaim_nograce(clp, state);
1158 static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1159 nfs4_stateid *stateid)
1161 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1163 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1164 nfs_test_and_clear_all_open_stateid(state);
1167 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1172 static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1174 if (state->n_wronly)
1175 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1176 if (state->n_rdonly)
1177 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1179 set_bit(NFS_O_RDWR_STATE, &state->flags);
1182 static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1183 nfs4_stateid *stateid, fmode_t fmode)
1185 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1186 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1188 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1191 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1194 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1195 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1196 clear_bit(NFS_OPEN_STATE, &state->flags);
1198 if (stateid == NULL)
1200 /* Handle races with OPEN */
1201 if (!nfs4_stateid_match_other(stateid, &state->open_stateid) ||
1202 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
1203 nfs_resync_open_stateid_locked(state);
1206 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1207 nfs4_stateid_copy(&state->stateid, stateid);
1208 nfs4_stateid_copy(&state->open_stateid, stateid);
1211 static void nfs_clear_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1213 write_seqlock(&state->seqlock);
1214 nfs_clear_open_stateid_locked(state, stateid, fmode);
1215 write_sequnlock(&state->seqlock);
1216 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1217 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1220 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1224 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1227 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1229 case FMODE_READ|FMODE_WRITE:
1230 set_bit(NFS_O_RDWR_STATE, &state->flags);
1232 if (!nfs_need_update_open_stateid(state, stateid))
1234 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1235 nfs4_stateid_copy(&state->stateid, stateid);
1236 nfs4_stateid_copy(&state->open_stateid, stateid);
1239 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1242 * Protect the call to nfs4_state_set_mode_locked and
1243 * serialise the stateid update
1245 write_seqlock(&state->seqlock);
1246 if (deleg_stateid != NULL) {
1247 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1248 set_bit(NFS_DELEGATED_STATE, &state->flags);
1250 if (open_stateid != NULL)
1251 nfs_set_open_stateid_locked(state, open_stateid, fmode);
1252 write_sequnlock(&state->seqlock);
1253 spin_lock(&state->owner->so_lock);
1254 update_open_stateflags(state, fmode);
1255 spin_unlock(&state->owner->so_lock);
1258 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
1260 struct nfs_inode *nfsi = NFS_I(state->inode);
1261 struct nfs_delegation *deleg_cur;
1264 fmode &= (FMODE_READ|FMODE_WRITE);
1267 deleg_cur = rcu_dereference(nfsi->delegation);
1268 if (deleg_cur == NULL)
1271 spin_lock(&deleg_cur->lock);
1272 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
1273 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
1274 (deleg_cur->type & fmode) != fmode)
1275 goto no_delegation_unlock;
1277 if (delegation == NULL)
1278 delegation = &deleg_cur->stateid;
1279 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1280 goto no_delegation_unlock;
1282 nfs_mark_delegation_referenced(deleg_cur);
1283 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1285 no_delegation_unlock:
1286 spin_unlock(&deleg_cur->lock);
1290 if (!ret && open_stateid != NULL) {
1291 __update_open_stateid(state, open_stateid, NULL, fmode);
1294 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1295 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1301 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1303 struct nfs_delegation *delegation;
1306 delegation = rcu_dereference(NFS_I(inode)->delegation);
1307 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1312 nfs4_inode_return_delegation(inode);
1315 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1317 struct nfs4_state *state = opendata->state;
1318 struct nfs_inode *nfsi = NFS_I(state->inode);
1319 struct nfs_delegation *delegation;
1320 int open_mode = opendata->o_arg.open_flags;
1321 fmode_t fmode = opendata->o_arg.fmode;
1322 nfs4_stateid stateid;
1326 spin_lock(&state->owner->so_lock);
1327 if (can_open_cached(state, fmode, open_mode)) {
1328 update_open_stateflags(state, fmode);
1329 spin_unlock(&state->owner->so_lock);
1330 goto out_return_state;
1332 spin_unlock(&state->owner->so_lock);
1334 delegation = rcu_dereference(nfsi->delegation);
1335 if (!can_open_delegated(delegation, fmode)) {
1339 /* Save the delegation */
1340 nfs4_stateid_copy(&stateid, &delegation->stateid);
1342 nfs_release_seqid(opendata->o_arg.seqid);
1343 if (!opendata->is_recover) {
1344 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1350 /* Try to update the stateid using the delegation */
1351 if (update_open_stateid(state, NULL, &stateid, fmode))
1352 goto out_return_state;
1355 return ERR_PTR(ret);
1357 atomic_inc(&state->count);
1362 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1364 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1365 struct nfs_delegation *delegation;
1366 int delegation_flags = 0;
1369 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1371 delegation_flags = delegation->flags;
1373 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1374 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1375 "returning a delegation for "
1376 "OPEN(CLAIM_DELEGATE_CUR)\n",
1378 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1379 nfs_inode_set_delegation(state->inode,
1380 data->owner->so_cred,
1383 nfs_inode_reclaim_delegation(state->inode,
1384 data->owner->so_cred,
1389 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1390 * and update the nfs4_state.
1392 static struct nfs4_state *
1393 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1395 struct inode *inode = data->state->inode;
1396 struct nfs4_state *state = data->state;
1399 if (!data->rpc_done) {
1400 if (data->rpc_status) {
1401 ret = data->rpc_status;
1404 /* cached opens have already been processed */
1408 ret = nfs_refresh_inode(inode, &data->f_attr);
1412 if (data->o_res.delegation_type != 0)
1413 nfs4_opendata_check_deleg(data, state);
1415 update_open_stateid(state, &data->o_res.stateid, NULL,
1417 atomic_inc(&state->count);
1421 return ERR_PTR(ret);
1425 static struct nfs4_state *
1426 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1428 struct inode *inode;
1429 struct nfs4_state *state = NULL;
1432 if (!data->rpc_done) {
1433 state = nfs4_try_open_cached(data);
1438 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1440 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1441 ret = PTR_ERR(inode);
1445 state = nfs4_get_open_state(inode, data->owner);
1448 if (data->o_res.delegation_type != 0)
1449 nfs4_opendata_check_deleg(data, state);
1450 update_open_stateid(state, &data->o_res.stateid, NULL,
1454 nfs_release_seqid(data->o_arg.seqid);
1459 return ERR_PTR(ret);
1462 static struct nfs4_state *
1463 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1465 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1466 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1467 return _nfs4_opendata_to_nfs4_state(data);
1470 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1472 struct nfs_inode *nfsi = NFS_I(state->inode);
1473 struct nfs_open_context *ctx;
1475 spin_lock(&state->inode->i_lock);
1476 list_for_each_entry(ctx, &nfsi->open_files, list) {
1477 if (ctx->state != state)
1479 get_nfs_open_context(ctx);
1480 spin_unlock(&state->inode->i_lock);
1483 spin_unlock(&state->inode->i_lock);
1484 return ERR_PTR(-ENOENT);
1487 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1488 struct nfs4_state *state, enum open_claim_type4 claim)
1490 struct nfs4_opendata *opendata;
1492 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1493 NULL, NULL, claim, GFP_NOFS);
1494 if (opendata == NULL)
1495 return ERR_PTR(-ENOMEM);
1496 opendata->state = state;
1497 atomic_inc(&state->count);
1501 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1503 struct nfs4_state *newstate;
1506 opendata->o_arg.open_flags = 0;
1507 opendata->o_arg.fmode = fmode;
1508 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1509 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1510 nfs4_init_opendata_res(opendata);
1511 ret = _nfs4_recover_proc_open(opendata);
1514 newstate = nfs4_opendata_to_nfs4_state(opendata);
1515 if (IS_ERR(newstate))
1516 return PTR_ERR(newstate);
1517 nfs4_close_state(newstate, fmode);
1522 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1524 struct nfs4_state *newstate;
1527 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1528 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1529 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1530 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1531 /* memory barrier prior to reading state->n_* */
1532 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1533 clear_bit(NFS_OPEN_STATE, &state->flags);
1535 if (state->n_rdwr != 0) {
1536 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1539 if (newstate != state)
1542 if (state->n_wronly != 0) {
1543 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1546 if (newstate != state)
1549 if (state->n_rdonly != 0) {
1550 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1553 if (newstate != state)
1557 * We may have performed cached opens for all three recoveries.
1558 * Check if we need to update the current stateid.
1560 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1561 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1562 write_seqlock(&state->seqlock);
1563 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1564 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1565 write_sequnlock(&state->seqlock);
1572 * reclaim state on the server after a reboot.
1574 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1576 struct nfs_delegation *delegation;
1577 struct nfs4_opendata *opendata;
1578 fmode_t delegation_type = 0;
1581 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1582 NFS4_OPEN_CLAIM_PREVIOUS);
1583 if (IS_ERR(opendata))
1584 return PTR_ERR(opendata);
1586 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1587 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1588 delegation_type = delegation->type;
1590 opendata->o_arg.u.delegation_type = delegation_type;
1591 status = nfs4_open_recover(opendata, state);
1592 nfs4_opendata_put(opendata);
1596 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1598 struct nfs_server *server = NFS_SERVER(state->inode);
1599 struct nfs4_exception exception = { };
1602 err = _nfs4_do_open_reclaim(ctx, state);
1603 trace_nfs4_open_reclaim(ctx, 0, err);
1604 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1606 if (err != -NFS4ERR_DELAY)
1608 nfs4_handle_exception(server, err, &exception);
1609 } while (exception.retry);
1613 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1615 struct nfs_open_context *ctx;
1618 ctx = nfs4_state_find_open_context(state);
1621 ret = nfs4_do_open_reclaim(ctx, state);
1622 put_nfs_open_context(ctx);
1626 static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1630 printk(KERN_ERR "NFS: %s: unhandled error "
1631 "%d.\n", __func__, err);
1636 case -NFS4ERR_BADSESSION:
1637 case -NFS4ERR_BADSLOT:
1638 case -NFS4ERR_BAD_HIGH_SLOT:
1639 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1640 case -NFS4ERR_DEADSESSION:
1641 set_bit(NFS_DELEGATED_STATE, &state->flags);
1642 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1644 case -NFS4ERR_STALE_CLIENTID:
1645 case -NFS4ERR_STALE_STATEID:
1646 set_bit(NFS_DELEGATED_STATE, &state->flags);
1647 case -NFS4ERR_EXPIRED:
1648 /* Don't recall a delegation if it was lost */
1649 nfs4_schedule_lease_recovery(server->nfs_client);
1651 case -NFS4ERR_MOVED:
1652 nfs4_schedule_migration_recovery(server);
1654 case -NFS4ERR_LEASE_MOVED:
1655 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1657 case -NFS4ERR_DELEG_REVOKED:
1658 case -NFS4ERR_ADMIN_REVOKED:
1659 case -NFS4ERR_BAD_STATEID:
1660 case -NFS4ERR_OPENMODE:
1661 nfs_inode_find_state_and_recover(state->inode,
1663 nfs4_schedule_stateid_recovery(server, state);
1665 case -NFS4ERR_DELAY:
1666 case -NFS4ERR_GRACE:
1667 set_bit(NFS_DELEGATED_STATE, &state->flags);
1671 case -NFS4ERR_DENIED:
1672 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1678 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1680 struct nfs_server *server = NFS_SERVER(state->inode);
1681 struct nfs4_opendata *opendata;
1684 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1685 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1686 if (IS_ERR(opendata))
1687 return PTR_ERR(opendata);
1688 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1689 err = nfs4_open_recover(opendata, state);
1690 nfs4_opendata_put(opendata);
1691 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1694 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1696 struct nfs4_opendata *data = calldata;
1698 nfs40_setup_sequence(data->o_arg.server, &data->c_arg.seq_args,
1699 &data->c_res.seq_res, task);
1702 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1704 struct nfs4_opendata *data = calldata;
1706 nfs40_sequence_done(task, &data->c_res.seq_res);
1708 data->rpc_status = task->tk_status;
1709 if (data->rpc_status == 0) {
1710 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1711 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1712 renew_lease(data->o_res.server, data->timestamp);
1717 static void nfs4_open_confirm_release(void *calldata)
1719 struct nfs4_opendata *data = calldata;
1720 struct nfs4_state *state = NULL;
1722 /* If this request hasn't been cancelled, do nothing */
1723 if (data->cancelled == 0)
1725 /* In case of error, no cleanup! */
1726 if (!data->rpc_done)
1728 state = nfs4_opendata_to_nfs4_state(data);
1730 nfs4_close_state(state, data->o_arg.fmode);
1732 nfs4_opendata_put(data);
1735 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1736 .rpc_call_prepare = nfs4_open_confirm_prepare,
1737 .rpc_call_done = nfs4_open_confirm_done,
1738 .rpc_release = nfs4_open_confirm_release,
1742 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1744 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1746 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1747 struct rpc_task *task;
1748 struct rpc_message msg = {
1749 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1750 .rpc_argp = &data->c_arg,
1751 .rpc_resp = &data->c_res,
1752 .rpc_cred = data->owner->so_cred,
1754 struct rpc_task_setup task_setup_data = {
1755 .rpc_client = server->client,
1756 .rpc_message = &msg,
1757 .callback_ops = &nfs4_open_confirm_ops,
1758 .callback_data = data,
1759 .workqueue = nfsiod_workqueue,
1760 .flags = RPC_TASK_ASYNC,
1764 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
1765 kref_get(&data->kref);
1767 data->rpc_status = 0;
1768 data->timestamp = jiffies;
1769 task = rpc_run_task(&task_setup_data);
1771 return PTR_ERR(task);
1772 status = nfs4_wait_for_completion_rpc_task(task);
1774 data->cancelled = 1;
1777 status = data->rpc_status;
1782 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1784 struct nfs4_opendata *data = calldata;
1785 struct nfs4_state_owner *sp = data->owner;
1786 struct nfs_client *clp = sp->so_server->nfs_client;
1788 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1791 * Check if we still need to send an OPEN call, or if we can use
1792 * a delegation instead.
1794 if (data->state != NULL) {
1795 struct nfs_delegation *delegation;
1797 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1800 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1801 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1802 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
1803 can_open_delegated(delegation, data->o_arg.fmode))
1804 goto unlock_no_action;
1807 /* Update client id. */
1808 data->o_arg.clientid = clp->cl_clientid;
1809 switch (data->o_arg.claim) {
1810 case NFS4_OPEN_CLAIM_PREVIOUS:
1811 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1812 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1813 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
1814 case NFS4_OPEN_CLAIM_FH:
1815 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1816 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1818 data->timestamp = jiffies;
1819 if (nfs4_setup_sequence(data->o_arg.server,
1820 &data->o_arg.seq_args,
1821 &data->o_res.seq_res,
1823 nfs_release_seqid(data->o_arg.seqid);
1825 /* Set the create mode (note dependency on the session type) */
1826 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1827 if (data->o_arg.open_flags & O_EXCL) {
1828 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1829 if (nfs4_has_persistent_session(clp))
1830 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1831 else if (clp->cl_mvops->minor_version > 0)
1832 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1838 task->tk_action = NULL;
1840 nfs4_sequence_done(task, &data->o_res.seq_res);
1843 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1845 struct nfs4_opendata *data = calldata;
1847 data->rpc_status = task->tk_status;
1849 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1852 if (task->tk_status == 0) {
1853 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1854 switch (data->o_res.f_attr->mode & S_IFMT) {
1858 data->rpc_status = -ELOOP;
1861 data->rpc_status = -EISDIR;
1864 data->rpc_status = -ENOTDIR;
1867 renew_lease(data->o_res.server, data->timestamp);
1868 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1869 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1874 static void nfs4_open_release(void *calldata)
1876 struct nfs4_opendata *data = calldata;
1877 struct nfs4_state *state = NULL;
1879 /* If this request hasn't been cancelled, do nothing */
1880 if (data->cancelled == 0)
1882 /* In case of error, no cleanup! */
1883 if (data->rpc_status != 0 || !data->rpc_done)
1885 /* In case we need an open_confirm, no cleanup! */
1886 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1888 state = nfs4_opendata_to_nfs4_state(data);
1890 nfs4_close_state(state, data->o_arg.fmode);
1892 nfs4_opendata_put(data);
1895 static const struct rpc_call_ops nfs4_open_ops = {
1896 .rpc_call_prepare = nfs4_open_prepare,
1897 .rpc_call_done = nfs4_open_done,
1898 .rpc_release = nfs4_open_release,
1901 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1903 struct inode *dir = data->dir->d_inode;
1904 struct nfs_server *server = NFS_SERVER(dir);
1905 struct nfs_openargs *o_arg = &data->o_arg;
1906 struct nfs_openres *o_res = &data->o_res;
1907 struct rpc_task *task;
1908 struct rpc_message msg = {
1909 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1912 .rpc_cred = data->owner->so_cred,
1914 struct rpc_task_setup task_setup_data = {
1915 .rpc_client = server->client,
1916 .rpc_message = &msg,
1917 .callback_ops = &nfs4_open_ops,
1918 .callback_data = data,
1919 .workqueue = nfsiod_workqueue,
1920 .flags = RPC_TASK_ASYNC,
1924 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1925 kref_get(&data->kref);
1927 data->rpc_status = 0;
1928 data->cancelled = 0;
1929 data->is_recover = 0;
1931 nfs4_set_sequence_privileged(&o_arg->seq_args);
1932 data->is_recover = 1;
1934 task = rpc_run_task(&task_setup_data);
1936 return PTR_ERR(task);
1937 status = nfs4_wait_for_completion_rpc_task(task);
1939 data->cancelled = 1;
1942 status = data->rpc_status;
1948 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1950 struct inode *dir = data->dir->d_inode;
1951 struct nfs_openres *o_res = &data->o_res;
1954 status = nfs4_run_open_task(data, 1);
1955 if (status != 0 || !data->rpc_done)
1958 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1960 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1961 status = _nfs4_proc_open_confirm(data);
1970 * Additional permission checks in order to distinguish between an
1971 * open for read, and an open for execute. This works around the
1972 * fact that NFSv4 OPEN treats read and execute permissions as being
1974 * Note that in the non-execute case, we want to turn off permission
1975 * checking if we just created a new file (POSIX open() semantics).
1977 static int nfs4_opendata_access(struct rpc_cred *cred,
1978 struct nfs4_opendata *opendata,
1979 struct nfs4_state *state, fmode_t fmode,
1982 struct nfs_access_entry cache;
1985 /* access call failed or for some reason the server doesn't
1986 * support any access modes -- defer access call until later */
1987 if (opendata->o_res.access_supported == 0)
1992 * Use openflags to check for exec, because fmode won't
1993 * always have FMODE_EXEC set when file open for exec.
1995 if (openflags & __FMODE_EXEC) {
1996 /* ONLY check for exec rights */
1998 } else if ((fmode & FMODE_READ) && !opendata->file_created)
2002 cache.jiffies = jiffies;
2003 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2004 nfs_access_add_cache(state->inode, &cache);
2006 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
2009 /* even though OPEN succeeded, access is denied. Close the file */
2010 nfs4_close_state(state, fmode);
2015 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2017 static int _nfs4_proc_open(struct nfs4_opendata *data)
2019 struct inode *dir = data->dir->d_inode;
2020 struct nfs_server *server = NFS_SERVER(dir);
2021 struct nfs_openargs *o_arg = &data->o_arg;
2022 struct nfs_openres *o_res = &data->o_res;
2025 status = nfs4_run_open_task(data, 0);
2026 if (!data->rpc_done)
2029 if (status == -NFS4ERR_BADNAME &&
2030 !(o_arg->open_flags & O_CREAT))
2035 nfs_fattr_map_and_free_names(server, &data->f_attr);
2037 if (o_arg->open_flags & O_CREAT) {
2038 update_changeattr(dir, &o_res->cinfo);
2039 if (o_arg->open_flags & O_EXCL)
2040 data->file_created = 1;
2041 else if (o_res->cinfo.before != o_res->cinfo.after)
2042 data->file_created = 1;
2044 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2045 server->caps &= ~NFS_CAP_POSIX_LOCK;
2046 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2047 status = _nfs4_proc_open_confirm(data);
2051 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
2052 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
2056 static int nfs4_recover_expired_lease(struct nfs_server *server)
2058 return nfs4_client_recover_expired_lease(server->nfs_client);
2063 * reclaim state on the server after a network partition.
2064 * Assumes caller holds the appropriate lock
2066 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2068 struct nfs4_opendata *opendata;
2071 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2072 NFS4_OPEN_CLAIM_FH);
2073 if (IS_ERR(opendata))
2074 return PTR_ERR(opendata);
2075 ret = nfs4_open_recover(opendata, state);
2077 d_drop(ctx->dentry);
2078 nfs4_opendata_put(opendata);
2082 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2084 struct nfs_server *server = NFS_SERVER(state->inode);
2085 struct nfs4_exception exception = { };
2089 err = _nfs4_open_expired(ctx, state);
2090 trace_nfs4_open_expired(ctx, 0, err);
2091 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2096 case -NFS4ERR_GRACE:
2097 case -NFS4ERR_DELAY:
2098 nfs4_handle_exception(server, err, &exception);
2101 } while (exception.retry);
2106 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2108 struct nfs_open_context *ctx;
2111 ctx = nfs4_state_find_open_context(state);
2114 ret = nfs4_do_open_expired(ctx, state);
2115 put_nfs_open_context(ctx);
2119 static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2121 nfs_remove_bad_delegation(state->inode);
2122 write_seqlock(&state->seqlock);
2123 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2124 write_sequnlock(&state->seqlock);
2125 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2128 static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2130 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2131 nfs_finish_clear_delegation_stateid(state);
2134 static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2136 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2137 nfs40_clear_delegation_stateid(state);
2138 return nfs4_open_expired(sp, state);
2141 #if defined(CONFIG_NFS_V4_1)
2142 static void nfs41_check_delegation_stateid(struct nfs4_state *state)
2144 struct nfs_server *server = NFS_SERVER(state->inode);
2145 nfs4_stateid stateid;
2146 struct nfs_delegation *delegation;
2147 struct rpc_cred *cred;
2150 /* Get the delegation credential for use by test/free_stateid */
2152 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2153 if (delegation == NULL) {
2158 nfs4_stateid_copy(&stateid, &delegation->stateid);
2159 cred = get_rpccred(delegation->cred);
2161 status = nfs41_test_stateid(server, &stateid, cred);
2162 trace_nfs4_test_delegation_stateid(state, NULL, status);
2164 if (status != NFS_OK) {
2165 /* Free the stateid unless the server explicitly
2166 * informs us the stateid is unrecognized. */
2167 if (status != -NFS4ERR_BAD_STATEID)
2168 nfs41_free_stateid(server, &stateid, cred);
2169 nfs_finish_clear_delegation_stateid(state);
2176 * nfs41_check_open_stateid - possibly free an open stateid
2178 * @state: NFSv4 state for an inode
2180 * Returns NFS_OK if recovery for this stateid is now finished.
2181 * Otherwise a negative NFS4ERR value is returned.
2183 static int nfs41_check_open_stateid(struct nfs4_state *state)
2185 struct nfs_server *server = NFS_SERVER(state->inode);
2186 nfs4_stateid *stateid = &state->open_stateid;
2187 struct rpc_cred *cred = state->owner->so_cred;
2190 /* If a state reset has been done, test_stateid is unneeded */
2191 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2192 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2193 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2194 return -NFS4ERR_BAD_STATEID;
2196 status = nfs41_test_stateid(server, stateid, cred);
2197 trace_nfs4_test_open_stateid(state, NULL, status);
2198 if (status != NFS_OK) {
2199 /* Free the stateid unless the server explicitly
2200 * informs us the stateid is unrecognized. */
2201 if (status != -NFS4ERR_BAD_STATEID)
2202 nfs41_free_stateid(server, stateid, cred);
2204 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2205 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2206 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2207 clear_bit(NFS_OPEN_STATE, &state->flags);
2212 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2216 nfs41_check_delegation_stateid(state);
2217 status = nfs41_check_open_stateid(state);
2218 if (status != NFS_OK)
2219 status = nfs4_open_expired(sp, state);
2225 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2226 * fields corresponding to attributes that were used to store the verifier.
2227 * Make sure we clobber those fields in the later setattr call
2229 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2231 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2232 !(sattr->ia_valid & ATTR_ATIME_SET))
2233 sattr->ia_valid |= ATTR_ATIME;
2235 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2236 !(sattr->ia_valid & ATTR_MTIME_SET))
2237 sattr->ia_valid |= ATTR_MTIME;
2240 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2243 struct nfs_open_context *ctx)
2245 struct nfs4_state_owner *sp = opendata->owner;
2246 struct nfs_server *server = sp->so_server;
2247 struct dentry *dentry;
2248 struct nfs4_state *state;
2252 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2254 ret = _nfs4_proc_open(opendata);
2258 state = nfs4_opendata_to_nfs4_state(opendata);
2259 ret = PTR_ERR(state);
2262 if (server->caps & NFS_CAP_POSIX_LOCK)
2263 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2265 dentry = opendata->dentry;
2266 if (dentry->d_inode == NULL) {
2267 /* FIXME: Is this d_drop() ever needed? */
2269 dentry = d_add_unique(dentry, igrab(state->inode));
2270 if (dentry == NULL) {
2271 dentry = opendata->dentry;
2272 } else if (dentry != ctx->dentry) {
2274 ctx->dentry = dget(dentry);
2276 nfs_set_verifier(dentry,
2277 nfs_save_change_attribute(opendata->dir->d_inode));
2280 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2285 if (dentry->d_inode == state->inode) {
2286 nfs_inode_attach_open_context(ctx);
2287 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2288 nfs4_schedule_stateid_recovery(server, state);
2295 * Returns a referenced nfs4_state
2297 static int _nfs4_do_open(struct inode *dir,
2298 struct nfs_open_context *ctx,
2300 struct iattr *sattr,
2301 struct nfs4_label *label,
2304 struct nfs4_state_owner *sp;
2305 struct nfs4_state *state = NULL;
2306 struct nfs_server *server = NFS_SERVER(dir);
2307 struct nfs4_opendata *opendata;
2308 struct dentry *dentry = ctx->dentry;
2309 struct rpc_cred *cred = ctx->cred;
2310 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2311 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
2312 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
2313 struct nfs4_label *olabel = NULL;
2316 /* Protect against reboot recovery conflicts */
2318 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2320 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2323 status = nfs4_recover_expired_lease(server);
2325 goto err_put_state_owner;
2326 if (dentry->d_inode != NULL)
2327 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
2329 if (dentry->d_inode)
2330 claim = NFS4_OPEN_CLAIM_FH;
2331 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
2332 label, claim, GFP_KERNEL);
2333 if (opendata == NULL)
2334 goto err_put_state_owner;
2337 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2338 if (IS_ERR(olabel)) {
2339 status = PTR_ERR(olabel);
2340 goto err_opendata_put;
2344 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2345 if (!opendata->f_attr.mdsthreshold) {
2346 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2347 if (!opendata->f_attr.mdsthreshold)
2348 goto err_free_label;
2350 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
2352 if (dentry->d_inode != NULL)
2353 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
2355 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
2357 goto err_free_label;
2360 if ((opendata->o_arg.open_flags & O_EXCL) &&
2361 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
2362 nfs4_exclusive_attrset(opendata, sattr);
2364 nfs_fattr_init(opendata->o_res.f_attr);
2365 status = nfs4_do_setattr(state->inode, cred,
2366 opendata->o_res.f_attr, sattr,
2367 state, label, olabel);
2369 nfs_setattr_update_inode(state->inode, sattr);
2370 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2371 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2374 if (opendata->file_created)
2375 *opened |= FILE_CREATED;
2377 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
2378 *ctx_th = opendata->f_attr.mdsthreshold;
2379 opendata->f_attr.mdsthreshold = NULL;
2382 nfs4_label_free(olabel);
2384 nfs4_opendata_put(opendata);
2385 nfs4_put_state_owner(sp);
2388 nfs4_label_free(olabel);
2390 nfs4_opendata_put(opendata);
2391 err_put_state_owner:
2392 nfs4_put_state_owner(sp);
2398 static struct nfs4_state *nfs4_do_open(struct inode *dir,
2399 struct nfs_open_context *ctx,
2401 struct iattr *sattr,
2402 struct nfs4_label *label,
2405 struct nfs_server *server = NFS_SERVER(dir);
2406 struct nfs4_exception exception = { };
2407 struct nfs4_state *res;
2411 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
2413 trace_nfs4_open_file(ctx, flags, status);
2416 /* NOTE: BAD_SEQID means the server and client disagree about the
2417 * book-keeping w.r.t. state-changing operations
2418 * (OPEN/CLOSE/LOCK/LOCKU...)
2419 * It is actually a sign of a bug on the client or on the server.
2421 * If we receive a BAD_SEQID error in the particular case of
2422 * doing an OPEN, we assume that nfs_increment_open_seqid() will
2423 * have unhashed the old state_owner for us, and that we can
2424 * therefore safely retry using a new one. We should still warn
2425 * the user though...
2427 if (status == -NFS4ERR_BAD_SEQID) {
2428 pr_warn_ratelimited("NFS: v4 server %s "
2429 " returned a bad sequence-id error!\n",
2430 NFS_SERVER(dir)->nfs_client->cl_hostname);
2431 exception.retry = 1;
2435 * BAD_STATEID on OPEN means that the server cancelled our
2436 * state before it received the OPEN_CONFIRM.
2437 * Recover by retrying the request as per the discussion
2438 * on Page 181 of RFC3530.
2440 if (status == -NFS4ERR_BAD_STATEID) {
2441 exception.retry = 1;
2444 if (status == -EAGAIN) {
2445 /* We must have found a delegation */
2446 exception.retry = 1;
2449 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2451 res = ERR_PTR(nfs4_handle_exception(server,
2452 status, &exception));
2453 } while (exception.retry);
2457 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2458 struct nfs_fattr *fattr, struct iattr *sattr,
2459 struct nfs4_state *state, struct nfs4_label *ilabel,
2460 struct nfs4_label *olabel)
2462 struct nfs_server *server = NFS_SERVER(inode);
2463 struct nfs_setattrargs arg = {
2464 .fh = NFS_FH(inode),
2467 .bitmask = server->attr_bitmask,
2470 struct nfs_setattrres res = {
2475 struct rpc_message msg = {
2476 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2481 unsigned long timestamp = jiffies;
2486 arg.bitmask = nfs4_bitmask(server, ilabel);
2488 arg.bitmask = nfs4_bitmask(server, olabel);
2490 nfs_fattr_init(fattr);
2492 /* Servers should only apply open mode checks for file size changes */
2493 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2494 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2496 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2497 /* Use that stateid */
2498 } else if (truncate && state != NULL) {
2499 struct nfs_lockowner lockowner = {
2500 .l_owner = current->files,
2501 .l_pid = current->tgid,
2503 if (!nfs4_valid_open_stateid(state))
2505 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2506 &lockowner) == -EIO)
2509 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
2511 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2512 if (status == 0 && state != NULL)
2513 renew_lease(server, timestamp);
2517 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2518 struct nfs_fattr *fattr, struct iattr *sattr,
2519 struct nfs4_state *state, struct nfs4_label *ilabel,
2520 struct nfs4_label *olabel)
2522 struct nfs_server *server = NFS_SERVER(inode);
2523 struct nfs4_exception exception = {
2529 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
2530 trace_nfs4_setattr(inode, err);
2532 case -NFS4ERR_OPENMODE:
2533 if (!(sattr->ia_valid & ATTR_SIZE)) {
2534 pr_warn_once("NFSv4: server %s is incorrectly "
2535 "applying open mode checks to "
2536 "a SETATTR that is not "
2537 "changing file size.\n",
2538 server->nfs_client->cl_hostname);
2540 if (state && !(state->state & FMODE_WRITE)) {
2542 if (sattr->ia_valid & ATTR_OPEN)
2547 err = nfs4_handle_exception(server, err, &exception);
2548 } while (exception.retry);
2553 struct nfs4_closedata {
2554 struct inode *inode;
2555 struct nfs4_state *state;
2556 struct nfs_closeargs arg;
2557 struct nfs_closeres res;
2558 struct nfs_fattr fattr;
2559 unsigned long timestamp;
2564 static void nfs4_free_closedata(void *data)
2566 struct nfs4_closedata *calldata = data;
2567 struct nfs4_state_owner *sp = calldata->state->owner;
2568 struct super_block *sb = calldata->state->inode->i_sb;
2571 pnfs_roc_release(calldata->state->inode);
2572 nfs4_put_open_state(calldata->state);
2573 nfs_free_seqid(calldata->arg.seqid);
2574 nfs4_put_state_owner(sp);
2575 nfs_sb_deactive(sb);
2579 static void nfs4_close_done(struct rpc_task *task, void *data)
2581 struct nfs4_closedata *calldata = data;
2582 struct nfs4_state *state = calldata->state;
2583 struct nfs_server *server = NFS_SERVER(calldata->inode);
2584 nfs4_stateid *res_stateid = NULL;
2586 dprintk("%s: begin!\n", __func__);
2587 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2589 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
2590 /* hmm. we are done with the inode, and in the process of freeing
2591 * the state_owner. we keep this around to process errors
2593 switch (task->tk_status) {
2595 res_stateid = &calldata->res.stateid;
2596 if (calldata->arg.fmode == 0 && calldata->roc)
2597 pnfs_roc_set_barrier(state->inode,
2598 calldata->roc_barrier);
2599 renew_lease(server, calldata->timestamp);
2601 case -NFS4ERR_ADMIN_REVOKED:
2602 case -NFS4ERR_STALE_STATEID:
2603 case -NFS4ERR_OLD_STATEID:
2604 case -NFS4ERR_BAD_STATEID:
2605 case -NFS4ERR_EXPIRED:
2606 if (!nfs4_stateid_match(&calldata->arg.stateid,
2608 rpc_restart_call_prepare(task);
2611 if (calldata->arg.fmode == 0)
2614 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
2615 rpc_restart_call_prepare(task);
2619 nfs_clear_open_stateid(state, res_stateid, calldata->arg.fmode);
2621 nfs_release_seqid(calldata->arg.seqid);
2622 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2623 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2626 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2628 struct nfs4_closedata *calldata = data;
2629 struct nfs4_state *state = calldata->state;
2630 struct inode *inode = calldata->inode;
2631 bool is_rdonly, is_wronly, is_rdwr;
2634 dprintk("%s: begin!\n", __func__);
2635 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2638 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2639 spin_lock(&state->owner->so_lock);
2640 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2641 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2642 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
2643 nfs4_stateid_copy(&calldata->arg.stateid, &state->stateid);
2644 /* Calculate the change in open mode */
2645 calldata->arg.fmode = 0;
2646 if (state->n_rdwr == 0) {
2647 if (state->n_rdonly == 0)
2648 call_close |= is_rdonly;
2650 calldata->arg.fmode |= FMODE_READ;
2651 if (state->n_wronly == 0)
2652 call_close |= is_wronly;
2654 calldata->arg.fmode |= FMODE_WRITE;
2656 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2658 if (calldata->arg.fmode == 0)
2659 call_close |= is_rdwr;
2661 if (!nfs4_valid_open_stateid(state))
2663 spin_unlock(&state->owner->so_lock);
2666 /* Note: exit _without_ calling nfs4_close_done */
2670 if (calldata->arg.fmode == 0) {
2671 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2672 if (calldata->roc &&
2673 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2674 nfs_release_seqid(calldata->arg.seqid);
2679 nfs_fattr_init(calldata->res.fattr);
2680 calldata->timestamp = jiffies;
2681 if (nfs4_setup_sequence(NFS_SERVER(inode),
2682 &calldata->arg.seq_args,
2683 &calldata->res.seq_res,
2685 nfs_release_seqid(calldata->arg.seqid);
2686 dprintk("%s: done!\n", __func__);
2689 task->tk_action = NULL;
2691 nfs4_sequence_done(task, &calldata->res.seq_res);
2694 static const struct rpc_call_ops nfs4_close_ops = {
2695 .rpc_call_prepare = nfs4_close_prepare,
2696 .rpc_call_done = nfs4_close_done,
2697 .rpc_release = nfs4_free_closedata,
2700 static bool nfs4_state_has_opener(struct nfs4_state *state)
2702 /* first check existing openers */
2703 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 &&
2704 state->n_rdonly != 0)
2707 if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 &&
2708 state->n_wronly != 0)
2711 if (test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 &&
2718 static bool nfs4_roc(struct inode *inode)
2720 struct nfs_inode *nfsi = NFS_I(inode);
2721 struct nfs_open_context *ctx;
2722 struct nfs4_state *state;
2724 spin_lock(&inode->i_lock);
2725 list_for_each_entry(ctx, &nfsi->open_files, list) {
2729 if (nfs4_state_has_opener(state)) {
2730 spin_unlock(&inode->i_lock);
2734 spin_unlock(&inode->i_lock);
2736 if (nfs4_check_delegation(inode, FMODE_READ))
2739 return pnfs_roc(inode);
2743 * It is possible for data to be read/written from a mem-mapped file
2744 * after the sys_close call (which hits the vfs layer as a flush).
2745 * This means that we can't safely call nfsv4 close on a file until
2746 * the inode is cleared. This in turn means that we are not good
2747 * NFSv4 citizens - we do not indicate to the server to update the file's
2748 * share state even when we are done with one of the three share
2749 * stateid's in the inode.
2751 * NOTE: Caller must be holding the sp->so_owner semaphore!
2753 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
2755 struct nfs_server *server = NFS_SERVER(state->inode);
2756 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
2757 struct nfs4_closedata *calldata;
2758 struct nfs4_state_owner *sp = state->owner;
2759 struct rpc_task *task;
2760 struct rpc_message msg = {
2761 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2762 .rpc_cred = state->owner->so_cred,
2764 struct rpc_task_setup task_setup_data = {
2765 .rpc_client = server->client,
2766 .rpc_message = &msg,
2767 .callback_ops = &nfs4_close_ops,
2768 .workqueue = nfsiod_workqueue,
2769 .flags = RPC_TASK_ASYNC,
2771 int status = -ENOMEM;
2773 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2774 &task_setup_data.rpc_client, &msg);
2776 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2777 if (calldata == NULL)
2779 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2780 calldata->inode = state->inode;
2781 calldata->state = state;
2782 calldata->arg.fh = NFS_FH(state->inode);
2783 /* Serialization for the sequence id */
2784 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
2785 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
2786 if (IS_ERR(calldata->arg.seqid))
2787 goto out_free_calldata;
2788 calldata->arg.fmode = 0;
2789 calldata->arg.bitmask = server->cache_consistency_bitmask;
2790 calldata->res.fattr = &calldata->fattr;
2791 calldata->res.seqid = calldata->arg.seqid;
2792 calldata->res.server = server;
2793 calldata->roc = nfs4_roc(state->inode);
2794 nfs_sb_active(calldata->inode->i_sb);
2796 msg.rpc_argp = &calldata->arg;
2797 msg.rpc_resp = &calldata->res;
2798 task_setup_data.callback_data = calldata;
2799 task = rpc_run_task(&task_setup_data);
2801 return PTR_ERR(task);
2804 status = rpc_wait_for_completion_task(task);
2810 nfs4_put_open_state(state);
2811 nfs4_put_state_owner(sp);
2815 static struct inode *
2816 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2817 int open_flags, struct iattr *attr, int *opened)
2819 struct nfs4_state *state;
2820 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2822 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
2824 /* Protect against concurrent sillydeletes */
2825 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
2827 nfs4_label_release_security(label);
2830 return ERR_CAST(state);
2831 return state->inode;
2834 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2836 if (ctx->state == NULL)
2839 nfs4_close_sync(ctx->state, ctx->mode);
2841 nfs4_close_state(ctx->state, ctx->mode);
2844 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2845 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
2846 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
2848 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2850 struct nfs4_server_caps_arg args = {
2853 struct nfs4_server_caps_res res = {};
2854 struct rpc_message msg = {
2855 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2861 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2863 /* Sanity check the server answers */
2864 switch (server->nfs_client->cl_minorversion) {
2866 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2867 res.attr_bitmask[2] = 0;
2870 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2873 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2875 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2876 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2877 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2878 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2879 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2880 NFS_CAP_CTIME|NFS_CAP_MTIME|
2881 NFS_CAP_SECURITY_LABEL);
2882 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2883 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2884 server->caps |= NFS_CAP_ACLS;
2885 if (res.has_links != 0)
2886 server->caps |= NFS_CAP_HARDLINKS;
2887 if (res.has_symlinks != 0)
2888 server->caps |= NFS_CAP_SYMLINKS;
2889 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2890 server->caps |= NFS_CAP_FILEID;
2891 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2892 server->caps |= NFS_CAP_MODE;
2893 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2894 server->caps |= NFS_CAP_NLINK;
2895 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2896 server->caps |= NFS_CAP_OWNER;
2897 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2898 server->caps |= NFS_CAP_OWNER_GROUP;
2899 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2900 server->caps |= NFS_CAP_ATIME;
2901 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2902 server->caps |= NFS_CAP_CTIME;
2903 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2904 server->caps |= NFS_CAP_MTIME;
2905 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
2906 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2907 server->caps |= NFS_CAP_SECURITY_LABEL;
2909 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2910 sizeof(server->attr_bitmask));
2911 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2913 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2914 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2915 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2916 server->cache_consistency_bitmask[2] = 0;
2917 server->acl_bitmask = res.acl_bitmask;
2918 server->fh_expire_type = res.fh_expire_type;
2924 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2926 struct nfs4_exception exception = { };
2929 err = nfs4_handle_exception(server,
2930 _nfs4_server_capabilities(server, fhandle),
2932 } while (exception.retry);
2936 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2937 struct nfs_fsinfo *info)
2940 struct nfs4_lookup_root_arg args = {
2943 struct nfs4_lookup_res res = {
2945 .fattr = info->fattr,
2948 struct rpc_message msg = {
2949 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2954 bitmask[0] = nfs4_fattr_bitmap[0];
2955 bitmask[1] = nfs4_fattr_bitmap[1];
2957 * Process the label in the upcoming getfattr
2959 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2961 nfs_fattr_init(info->fattr);
2962 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2965 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2966 struct nfs_fsinfo *info)
2968 struct nfs4_exception exception = { };
2971 err = _nfs4_lookup_root(server, fhandle, info);
2972 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
2975 case -NFS4ERR_WRONGSEC:
2978 err = nfs4_handle_exception(server, err, &exception);
2980 } while (exception.retry);
2985 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2986 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2988 struct rpc_auth_create_args auth_args = {
2989 .pseudoflavor = flavor,
2991 struct rpc_auth *auth;
2994 auth = rpcauth_create(&auth_args, server->client);
2999 ret = nfs4_lookup_root(server, fhandle, info);
3005 * Retry pseudoroot lookup with various security flavors. We do this when:
3007 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3008 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3010 * Returns zero on success, or a negative NFS4ERR value, or a
3011 * negative errno value.
3013 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3014 struct nfs_fsinfo *info)
3016 /* Per 3530bis 15.33.5 */
3017 static const rpc_authflavor_t flav_array[] = {
3021 RPC_AUTH_UNIX, /* courtesy */
3024 int status = -EPERM;
3027 if (server->auth_info.flavor_len > 0) {
3028 /* try each flavor specified by user */
3029 for (i = 0; i < server->auth_info.flavor_len; i++) {
3030 status = nfs4_lookup_root_sec(server, fhandle, info,
3031 server->auth_info.flavors[i]);
3032 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3037 /* no flavors specified by user, try default list */
3038 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3039 status = nfs4_lookup_root_sec(server, fhandle, info,
3041 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3048 * -EACCESS could mean that the user doesn't have correct permissions
3049 * to access the mount. It could also mean that we tried to mount
3050 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3051 * existing mount programs don't handle -EACCES very well so it should
3052 * be mapped to -EPERM instead.
3054 if (status == -EACCES)
3059 static int nfs4_do_find_root_sec(struct nfs_server *server,
3060 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3062 int mv = server->nfs_client->cl_minorversion;
3063 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3067 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3068 * @server: initialized nfs_server handle
3069 * @fhandle: we fill in the pseudo-fs root file handle
3070 * @info: we fill in an FSINFO struct
3071 * @auth_probe: probe the auth flavours
3073 * Returns zero on success, or a negative errno.
3075 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
3076 struct nfs_fsinfo *info,
3081 switch (auth_probe) {
3083 status = nfs4_lookup_root(server, fhandle, info);
3084 if (status != -NFS4ERR_WRONGSEC)
3087 status = nfs4_do_find_root_sec(server, fhandle, info);
3091 status = nfs4_server_capabilities(server, fhandle);
3093 status = nfs4_do_fsinfo(server, fhandle, info);
3095 return nfs4_map_errors(status);
3098 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3099 struct nfs_fsinfo *info)
3102 struct nfs_fattr *fattr = info->fattr;
3103 struct nfs4_label *label = NULL;
3105 error = nfs4_server_capabilities(server, mntfh);
3107 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3111 label = nfs4_label_alloc(server, GFP_KERNEL);
3113 return PTR_ERR(label);
3115 error = nfs4_proc_getattr(server, mntfh, fattr, label);
3117 dprintk("nfs4_get_root: getattr error = %d\n", -error);
3118 goto err_free_label;
3121 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3122 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3123 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3126 nfs4_label_free(label);
3132 * Get locations and (maybe) other attributes of a referral.
3133 * Note that we'll actually follow the referral later when
3134 * we detect fsid mismatch in inode revalidation
3136 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3137 const struct qstr *name, struct nfs_fattr *fattr,
3138 struct nfs_fh *fhandle)
3140 int status = -ENOMEM;
3141 struct page *page = NULL;
3142 struct nfs4_fs_locations *locations = NULL;
3144 page = alloc_page(GFP_KERNEL);
3147 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3148 if (locations == NULL)
3151 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
3156 * If the fsid didn't change, this is a migration event, not a
3157 * referral. Cause us to drop into the exception handler, which
3158 * will kick off migration recovery.
3160 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3161 dprintk("%s: server did not return a different fsid for"
3162 " a referral at %s\n", __func__, name->name);
3163 status = -NFS4ERR_MOVED;
3166 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3167 nfs_fixup_referral_attributes(&locations->fattr);
3169 /* replace the lookup nfs_fattr with the locations nfs_fattr */
3170 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
3171 memset(fhandle, 0, sizeof(struct nfs_fh));
3179 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3180 struct nfs_fattr *fattr, struct nfs4_label *label)
3182 struct nfs4_getattr_arg args = {
3184 .bitmask = server->attr_bitmask,
3186 struct nfs4_getattr_res res = {
3191 struct rpc_message msg = {
3192 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3197 args.bitmask = nfs4_bitmask(server, label);
3199 nfs_fattr_init(fattr);
3200 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3203 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3204 struct nfs_fattr *fattr, struct nfs4_label *label)
3206 struct nfs4_exception exception = { };
3209 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3210 trace_nfs4_getattr(server, fhandle, fattr, err);
3211 err = nfs4_handle_exception(server, err,
3213 } while (exception.retry);
3218 * The file is not closed if it is opened due to the a request to change
3219 * the size of the file. The open call will not be needed once the
3220 * VFS layer lookup-intents are implemented.
3222 * Close is called when the inode is destroyed.
3223 * If we haven't opened the file for O_WRONLY, we
3224 * need to in the size_change case to obtain a stateid.
3227 * Because OPEN is always done by name in nfsv4, it is
3228 * possible that we opened a different file by the same
3229 * name. We can recognize this race condition, but we
3230 * can't do anything about it besides returning an error.
3232 * This will be fixed with VFS changes (lookup-intent).
3235 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3236 struct iattr *sattr)
3238 struct inode *inode = dentry->d_inode;
3239 struct rpc_cred *cred = NULL;
3240 struct nfs4_state *state = NULL;
3241 struct nfs4_label *label = NULL;
3244 if (pnfs_ld_layoutret_on_setattr(inode) &&
3245 sattr->ia_valid & ATTR_SIZE &&
3246 sattr->ia_size < i_size_read(inode))
3247 pnfs_commit_and_return_layout(inode);
3249 nfs_fattr_init(fattr);
3251 /* Deal with open(O_TRUNC) */
3252 if (sattr->ia_valid & ATTR_OPEN)
3253 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
3255 /* Optimization: if the end result is no change, don't RPC */
3256 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
3259 /* Search for an existing open(O_WRITE) file */
3260 if (sattr->ia_valid & ATTR_FILE) {
3261 struct nfs_open_context *ctx;
3263 ctx = nfs_file_open_context(sattr->ia_file);
3270 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3272 return PTR_ERR(label);
3274 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
3276 nfs_setattr_update_inode(inode, sattr);
3277 nfs_setsecurity(inode, fattr, label);
3279 nfs4_label_free(label);
3283 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3284 const struct qstr *name, struct nfs_fh *fhandle,
3285 struct nfs_fattr *fattr, struct nfs4_label *label)
3287 struct nfs_server *server = NFS_SERVER(dir);
3289 struct nfs4_lookup_arg args = {
3290 .bitmask = server->attr_bitmask,
3291 .dir_fh = NFS_FH(dir),
3294 struct nfs4_lookup_res res = {
3300 struct rpc_message msg = {
3301 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3306 args.bitmask = nfs4_bitmask(server, label);
3308 nfs_fattr_init(fattr);
3310 dprintk("NFS call lookup %s\n", name->name);
3311 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
3312 dprintk("NFS reply lookup: %d\n", status);
3316 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
3318 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
3319 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
3320 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3324 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3325 struct qstr *name, struct nfs_fh *fhandle,
3326 struct nfs_fattr *fattr, struct nfs4_label *label)
3328 struct nfs4_exception exception = { };
3329 struct rpc_clnt *client = *clnt;
3332 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
3333 trace_nfs4_lookup(dir, name, err);
3335 case -NFS4ERR_BADNAME:
3338 case -NFS4ERR_MOVED:
3339 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
3341 case -NFS4ERR_WRONGSEC:
3343 if (client != *clnt)
3345 client = nfs4_negotiate_security(client, dir, name);
3347 return PTR_ERR(client);
3349 exception.retry = 1;
3352 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3354 } while (exception.retry);
3359 else if (client != *clnt)
3360 rpc_shutdown_client(client);
3365 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
3366 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3367 struct nfs4_label *label)
3370 struct rpc_clnt *client = NFS_CLIENT(dir);
3372 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
3373 if (client != NFS_CLIENT(dir)) {
3374 rpc_shutdown_client(client);
3375 nfs_fixup_secinfo_attributes(fattr);
3381 nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3382 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3384 struct rpc_clnt *client = NFS_CLIENT(dir);
3387 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
3389 return ERR_PTR(status);
3390 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
3393 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3395 struct nfs_server *server = NFS_SERVER(inode);
3396 struct nfs4_accessargs args = {
3397 .fh = NFS_FH(inode),
3398 .bitmask = server->cache_consistency_bitmask,
3400 struct nfs4_accessres res = {
3403 struct rpc_message msg = {
3404 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3407 .rpc_cred = entry->cred,
3409 int mode = entry->mask;
3413 * Determine which access bits we want to ask for...
3415 if (mode & MAY_READ)
3416 args.access |= NFS4_ACCESS_READ;
3417 if (S_ISDIR(inode->i_mode)) {
3418 if (mode & MAY_WRITE)
3419 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3420 if (mode & MAY_EXEC)
3421 args.access |= NFS4_ACCESS_LOOKUP;
3423 if (mode & MAY_WRITE)
3424 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3425 if (mode & MAY_EXEC)
3426 args.access |= NFS4_ACCESS_EXECUTE;
3429 res.fattr = nfs_alloc_fattr();
3430 if (res.fattr == NULL)
3433 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3435 nfs_access_set_mask(entry, res.access);
3436 nfs_refresh_inode(inode, res.fattr);
3438 nfs_free_fattr(res.fattr);
3442 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3444 struct nfs4_exception exception = { };
3447 err = _nfs4_proc_access(inode, entry);
3448 trace_nfs4_access(inode, err);
3449 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3451 } while (exception.retry);
3456 * TODO: For the time being, we don't try to get any attributes
3457 * along with any of the zero-copy operations READ, READDIR,
3460 * In the case of the first three, we want to put the GETATTR
3461 * after the read-type operation -- this is because it is hard
3462 * to predict the length of a GETATTR response in v4, and thus
3463 * align the READ data correctly. This means that the GETATTR
3464 * may end up partially falling into the page cache, and we should
3465 * shift it into the 'tail' of the xdr_buf before processing.
3466 * To do this efficiently, we need to know the total length
3467 * of data received, which doesn't seem to be available outside
3470 * In the case of WRITE, we also want to put the GETATTR after
3471 * the operation -- in this case because we want to make sure
3472 * we get the post-operation mtime and size.
3474 * Both of these changes to the XDR layer would in fact be quite
3475 * minor, but I decided to leave them for a subsequent patch.
3477 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3478 unsigned int pgbase, unsigned int pglen)
3480 struct nfs4_readlink args = {
3481 .fh = NFS_FH(inode),
3486 struct nfs4_readlink_res res;
3487 struct rpc_message msg = {
3488 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3493 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
3496 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3497 unsigned int pgbase, unsigned int pglen)
3499 struct nfs4_exception exception = { };
3502 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3503 trace_nfs4_readlink(inode, err);
3504 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3506 } while (exception.retry);
3511 * This is just for mknod. open(O_CREAT) will always do ->open_context().
3514 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
3517 struct nfs4_label l, *ilabel = NULL;
3518 struct nfs_open_context *ctx;
3519 struct nfs4_state *state;
3523 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3525 return PTR_ERR(ctx);
3527 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3529 sattr->ia_mode &= ~current_umask();
3530 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
3531 if (IS_ERR(state)) {
3532 status = PTR_ERR(state);
3536 nfs4_label_release_security(ilabel);
3537 put_nfs_open_context(ctx);
3541 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3543 struct nfs_server *server = NFS_SERVER(dir);
3544 struct nfs_removeargs args = {
3548 struct nfs_removeres res = {
3551 struct rpc_message msg = {
3552 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3558 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
3560 update_changeattr(dir, &res.cinfo);
3564 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3566 struct nfs4_exception exception = { };
3569 err = _nfs4_proc_remove(dir, name);
3570 trace_nfs4_remove(dir, name, err);
3571 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3573 } while (exception.retry);
3577 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
3579 struct nfs_server *server = NFS_SERVER(dir);
3580 struct nfs_removeargs *args = msg->rpc_argp;
3581 struct nfs_removeres *res = msg->rpc_resp;
3583 res->server = server;
3584 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
3585 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
3587 nfs_fattr_init(res->dir_attr);
3590 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3592 nfs4_setup_sequence(NFS_SERVER(data->dir),
3593 &data->args.seq_args,
3598 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
3600 struct nfs_unlinkdata *data = task->tk_calldata;
3601 struct nfs_removeres *res = &data->res;
3603 if (!nfs4_sequence_done(task, &res->seq_res))
3605 if (nfs4_async_handle_error(task, res->server, NULL,
3606 &data->timeout) == -EAGAIN)
3608 update_changeattr(dir, &res->cinfo);
3612 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3614 struct nfs_server *server = NFS_SERVER(dir);
3615 struct nfs_renameargs *arg = msg->rpc_argp;
3616 struct nfs_renameres *res = msg->rpc_resp;
3618 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
3619 res->server = server;
3620 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
3623 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3625 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3626 &data->args.seq_args,
3631 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3632 struct inode *new_dir)
3634 struct nfs_renamedata *data = task->tk_calldata;
3635 struct nfs_renameres *res = &data->res;
3637 if (!nfs4_sequence_done(task, &res->seq_res))
3639 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
3642 update_changeattr(old_dir, &res->old_cinfo);
3643 update_changeattr(new_dir, &res->new_cinfo);
3647 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3649 struct nfs_server *server = NFS_SERVER(inode);
3650 struct nfs4_link_arg arg = {
3651 .fh = NFS_FH(inode),
3652 .dir_fh = NFS_FH(dir),
3654 .bitmask = server->attr_bitmask,
3656 struct nfs4_link_res res = {
3660 struct rpc_message msg = {
3661 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3665 int status = -ENOMEM;
3667 res.fattr = nfs_alloc_fattr();
3668 if (res.fattr == NULL)
3671 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3672 if (IS_ERR(res.label)) {
3673 status = PTR_ERR(res.label);
3676 arg.bitmask = nfs4_bitmask(server, res.label);
3678 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3680 update_changeattr(dir, &res.cinfo);
3681 status = nfs_post_op_update_inode(inode, res.fattr);
3683 nfs_setsecurity(inode, res.fattr, res.label);
3687 nfs4_label_free(res.label);
3690 nfs_free_fattr(res.fattr);
3694 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3696 struct nfs4_exception exception = { };
3699 err = nfs4_handle_exception(NFS_SERVER(inode),
3700 _nfs4_proc_link(inode, dir, name),
3702 } while (exception.retry);
3706 struct nfs4_createdata {
3707 struct rpc_message msg;
3708 struct nfs4_create_arg arg;
3709 struct nfs4_create_res res;
3711 struct nfs_fattr fattr;
3712 struct nfs4_label *label;
3715 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3716 struct qstr *name, struct iattr *sattr, u32 ftype)
3718 struct nfs4_createdata *data;
3720 data = kzalloc(sizeof(*data), GFP_KERNEL);
3722 struct nfs_server *server = NFS_SERVER(dir);
3724 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3725 if (IS_ERR(data->label))
3728 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3729 data->msg.rpc_argp = &data->arg;
3730 data->msg.rpc_resp = &data->res;
3731 data->arg.dir_fh = NFS_FH(dir);
3732 data->arg.server = server;
3733 data->arg.name = name;
3734 data->arg.attrs = sattr;
3735 data->arg.ftype = ftype;
3736 data->arg.bitmask = nfs4_bitmask(server, data->label);
3737 data->res.server = server;
3738 data->res.fh = &data->fh;
3739 data->res.fattr = &data->fattr;
3740 data->res.label = data->label;
3741 nfs_fattr_init(data->res.fattr);
3749 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3751 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3752 &data->arg.seq_args, &data->res.seq_res, 1);
3754 update_changeattr(dir, &data->res.dir_cinfo);
3755 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
3760 static void nfs4_free_createdata(struct nfs4_createdata *data)
3762 nfs4_label_free(data->label);
3766 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3767 struct page *page, unsigned int len, struct iattr *sattr,
3768 struct nfs4_label *label)
3770 struct nfs4_createdata *data;
3771 int status = -ENAMETOOLONG;
3773 if (len > NFS4_MAXPATHLEN)
3777 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3781 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3782 data->arg.u.symlink.pages = &page;
3783 data->arg.u.symlink.len = len;
3784 data->arg.label = label;
3786 status = nfs4_do_create(dir, dentry, data);
3788 nfs4_free_createdata(data);
3793 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3794 struct page *page, unsigned int len, struct iattr *sattr)
3796 struct nfs4_exception exception = { };
3797 struct nfs4_label l, *label = NULL;
3800 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3803 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3804 trace_nfs4_symlink(dir, &dentry->d_name, err);
3805 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3807 } while (exception.retry);
3809 nfs4_label_release_security(label);
3813 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3814 struct iattr *sattr, struct nfs4_label *label)
3816 struct nfs4_createdata *data;
3817 int status = -ENOMEM;
3819 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3823 data->arg.label = label;
3824 status = nfs4_do_create(dir, dentry, data);
3826 nfs4_free_createdata(data);
3831 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3832 struct iattr *sattr)
3834 struct nfs4_exception exception = { };
3835 struct nfs4_label l, *label = NULL;
3838 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3840 sattr->ia_mode &= ~current_umask();
3842 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3843 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3844 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3846 } while (exception.retry);
3847 nfs4_label_release_security(label);
3852 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3853 u64 cookie, struct page **pages, unsigned int count, int plus)
3855 struct inode *dir = dentry->d_inode;
3856 struct nfs4_readdir_arg args = {
3861 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3864 struct nfs4_readdir_res res;
3865 struct rpc_message msg = {
3866 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3873 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3875 (unsigned long long)cookie);
3876 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
3877 res.pgbase = args.pgbase;
3878 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3880 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
3881 status += args.pgbase;
3884 nfs_invalidate_atime(dir);
3886 dprintk("%s: returns %d\n", __func__, status);
3890 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3891 u64 cookie, struct page **pages, unsigned int count, int plus)
3893 struct nfs4_exception exception = { };
3896 err = _nfs4_proc_readdir(dentry, cred, cookie,
3897 pages, count, plus);
3898 trace_nfs4_readdir(dentry->d_inode, err);
3899 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
3901 } while (exception.retry);
3905 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3906 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
3908 struct nfs4_createdata *data;
3909 int mode = sattr->ia_mode;
3910 int status = -ENOMEM;
3912 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3917 data->arg.ftype = NF4FIFO;
3918 else if (S_ISBLK(mode)) {
3919 data->arg.ftype = NF4BLK;
3920 data->arg.u.device.specdata1 = MAJOR(rdev);
3921 data->arg.u.device.specdata2 = MINOR(rdev);
3923 else if (S_ISCHR(mode)) {
3924 data->arg.ftype = NF4CHR;
3925 data->arg.u.device.specdata1 = MAJOR(rdev);
3926 data->arg.u.device.specdata2 = MINOR(rdev);
3927 } else if (!S_ISSOCK(mode)) {
3932 data->arg.label = label;
3933 status = nfs4_do_create(dir, dentry, data);
3935 nfs4_free_createdata(data);
3940 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3941 struct iattr *sattr, dev_t rdev)
3943 struct nfs4_exception exception = { };
3944 struct nfs4_label l, *label = NULL;
3947 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3949 sattr->ia_mode &= ~current_umask();
3951 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3952 trace_nfs4_mknod(dir, &dentry->d_name, err);
3953 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3955 } while (exception.retry);
3957 nfs4_label_release_security(label);
3962 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3963 struct nfs_fsstat *fsstat)
3965 struct nfs4_statfs_arg args = {
3967 .bitmask = server->attr_bitmask,
3969 struct nfs4_statfs_res res = {
3972 struct rpc_message msg = {
3973 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3978 nfs_fattr_init(fsstat->fattr);
3979 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3982 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3984 struct nfs4_exception exception = { };
3987 err = nfs4_handle_exception(server,
3988 _nfs4_proc_statfs(server, fhandle, fsstat),
3990 } while (exception.retry);
3994 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3995 struct nfs_fsinfo *fsinfo)
3997 struct nfs4_fsinfo_arg args = {
3999 .bitmask = server->attr_bitmask,
4001 struct nfs4_fsinfo_res res = {
4004 struct rpc_message msg = {
4005 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4010 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4013 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4015 struct nfs4_exception exception = { };
4016 unsigned long now = jiffies;
4020 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
4021 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
4023 struct nfs_client *clp = server->nfs_client;
4025 spin_lock(&clp->cl_lock);
4026 clp->cl_lease_time = fsinfo->lease_time * HZ;
4027 clp->cl_last_renewal = now;
4028 spin_unlock(&clp->cl_lock);
4031 err = nfs4_handle_exception(server, err, &exception);
4032 } while (exception.retry);
4036 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4040 nfs_fattr_init(fsinfo->fattr);
4041 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
4043 /* block layout checks this! */
4044 server->pnfs_blksize = fsinfo->blksize;
4045 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
4051 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4052 struct nfs_pathconf *pathconf)
4054 struct nfs4_pathconf_arg args = {
4056 .bitmask = server->attr_bitmask,
4058 struct nfs4_pathconf_res res = {
4059 .pathconf = pathconf,
4061 struct rpc_message msg = {
4062 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4067 /* None of the pathconf attributes are mandatory to implement */
4068 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4069 memset(pathconf, 0, sizeof(*pathconf));
4073 nfs_fattr_init(pathconf->fattr);
4074 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4077 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4078 struct nfs_pathconf *pathconf)
4080 struct nfs4_exception exception = { };
4084 err = nfs4_handle_exception(server,
4085 _nfs4_proc_pathconf(server, fhandle, pathconf),
4087 } while (exception.retry);
4091 int nfs4_set_rw_stateid(nfs4_stateid *stateid,
4092 const struct nfs_open_context *ctx,
4093 const struct nfs_lock_context *l_ctx,
4096 const struct nfs_lockowner *lockowner = NULL;
4099 lockowner = &l_ctx->lockowner;
4100 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
4102 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4104 static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4105 const struct nfs_open_context *ctx,
4106 const struct nfs_lock_context *l_ctx,
4109 nfs4_stateid current_stateid;
4111 /* If the current stateid represents a lost lock, then exit */
4112 if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode) == -EIO)
4114 return nfs4_stateid_match(stateid, ¤t_stateid);
4117 static bool nfs4_error_stateid_expired(int err)
4120 case -NFS4ERR_DELEG_REVOKED:
4121 case -NFS4ERR_ADMIN_REVOKED:
4122 case -NFS4ERR_BAD_STATEID:
4123 case -NFS4ERR_STALE_STATEID:
4124 case -NFS4ERR_OLD_STATEID:
4125 case -NFS4ERR_OPENMODE:
4126 case -NFS4ERR_EXPIRED:
4132 void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
4134 nfs_invalidate_atime(hdr->inode);
4137 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
4139 struct nfs_server *server = NFS_SERVER(hdr->inode);
4141 trace_nfs4_read(hdr, task->tk_status);
4142 if (nfs4_async_handle_error(task, server,
4143 hdr->args.context->state,
4145 rpc_restart_call_prepare(task);
4149 __nfs4_read_done_cb(hdr);
4150 if (task->tk_status > 0)
4151 renew_lease(server, hdr->timestamp);
4155 static bool nfs4_read_stateid_changed(struct rpc_task *task,
4156 struct nfs_pgio_args *args)
4159 if (!nfs4_error_stateid_expired(task->tk_status) ||
4160 nfs4_stateid_is_current(&args->stateid,
4165 rpc_restart_call_prepare(task);
4169 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4172 dprintk("--> %s\n", __func__);
4174 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4176 if (nfs4_read_stateid_changed(task, &hdr->args))
4178 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4179 nfs4_read_done_cb(task, hdr);
4182 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4183 struct rpc_message *msg)
4185 hdr->timestamp = jiffies;
4186 hdr->pgio_done_cb = nfs4_read_done_cb;
4187 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
4188 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
4191 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4192 struct nfs_pgio_header *hdr)
4194 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4195 &hdr->args.seq_args,
4199 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4200 hdr->args.lock_context,
4201 hdr->rw_ops->rw_mode) == -EIO)
4203 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
4208 static int nfs4_write_done_cb(struct rpc_task *task,
4209 struct nfs_pgio_header *hdr)
4211 struct inode *inode = hdr->inode;
4213 trace_nfs4_write(hdr, task->tk_status);
4214 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4215 hdr->args.context->state,
4217 rpc_restart_call_prepare(task);
4220 if (task->tk_status >= 0) {
4221 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4222 nfs_post_op_update_inode_force_wcc(inode, &hdr->fattr);
4227 static bool nfs4_write_stateid_changed(struct rpc_task *task,
4228 struct nfs_pgio_args *args)
4231 if (!nfs4_error_stateid_expired(task->tk_status) ||
4232 nfs4_stateid_is_current(&args->stateid,
4237 rpc_restart_call_prepare(task);
4241 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4243 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4245 if (nfs4_write_stateid_changed(task, &hdr->args))
4247 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4248 nfs4_write_done_cb(task, hdr);
4252 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
4254 /* Don't request attributes for pNFS or O_DIRECT writes */
4255 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
4257 /* Otherwise, request attributes if and only if we don't hold
4260 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
4263 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4264 struct rpc_message *msg)
4266 struct nfs_server *server = NFS_SERVER(hdr->inode);
4268 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4269 hdr->args.bitmask = NULL;
4270 hdr->res.fattr = NULL;
4272 hdr->args.bitmask = server->cache_consistency_bitmask;
4274 if (!hdr->pgio_done_cb)
4275 hdr->pgio_done_cb = nfs4_write_done_cb;
4276 hdr->res.server = server;
4277 hdr->timestamp = jiffies;
4279 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
4280 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
4283 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
4285 nfs4_setup_sequence(NFS_SERVER(data->inode),
4286 &data->args.seq_args,
4291 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
4293 struct inode *inode = data->inode;
4295 trace_nfs4_commit(data, task->tk_status);
4296 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4297 NULL, NULL) == -EAGAIN) {
4298 rpc_restart_call_prepare(task);
4304 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
4306 if (!nfs4_sequence_done(task, &data->res.seq_res))
4308 return data->commit_done_cb(task, data);
4311 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
4313 struct nfs_server *server = NFS_SERVER(data->inode);
4315 if (data->commit_done_cb == NULL)
4316 data->commit_done_cb = nfs4_commit_done_cb;
4317 data->res.server = server;
4318 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
4319 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4322 struct nfs4_renewdata {
4323 struct nfs_client *client;
4324 unsigned long timestamp;
4328 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4329 * standalone procedure for queueing an asynchronous RENEW.
4331 static void nfs4_renew_release(void *calldata)
4333 struct nfs4_renewdata *data = calldata;
4334 struct nfs_client *clp = data->client;
4336 if (atomic_read(&clp->cl_count) > 1)
4337 nfs4_schedule_state_renewal(clp);
4338 nfs_put_client(clp);
4342 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
4344 struct nfs4_renewdata *data = calldata;
4345 struct nfs_client *clp = data->client;
4346 unsigned long timestamp = data->timestamp;
4348 trace_nfs4_renew_async(clp, task->tk_status);
4349 switch (task->tk_status) {
4352 case -NFS4ERR_LEASE_MOVED:
4353 nfs4_schedule_lease_moved_recovery(clp);
4356 /* Unless we're shutting down, schedule state recovery! */
4357 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4359 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
4360 nfs4_schedule_lease_recovery(clp);
4363 nfs4_schedule_path_down_recovery(clp);
4365 do_renew_lease(clp, timestamp);
4368 static const struct rpc_call_ops nfs4_renew_ops = {
4369 .rpc_call_done = nfs4_renew_done,
4370 .rpc_release = nfs4_renew_release,
4373 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
4375 struct rpc_message msg = {
4376 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4380 struct nfs4_renewdata *data;
4382 if (renew_flags == 0)
4384 if (!atomic_inc_not_zero(&clp->cl_count))
4386 data = kmalloc(sizeof(*data), GFP_NOFS);
4390 data->timestamp = jiffies;
4391 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
4392 &nfs4_renew_ops, data);
4395 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
4397 struct rpc_message msg = {
4398 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4402 unsigned long now = jiffies;
4405 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4408 do_renew_lease(clp, now);
4412 static inline int nfs4_server_supports_acls(struct nfs_server *server)
4414 return server->caps & NFS_CAP_ACLS;
4417 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4418 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
4421 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
4423 static int buf_to_pages_noslab(const void *buf, size_t buflen,
4424 struct page **pages, unsigned int *pgbase)
4426 struct page *newpage, **spages;
4432 len = min_t(size_t, PAGE_SIZE, buflen);
4433 newpage = alloc_page(GFP_KERNEL);
4435 if (newpage == NULL)
4437 memcpy(page_address(newpage), buf, len);
4442 } while (buflen != 0);
4448 __free_page(spages[rc-1]);
4452 struct nfs4_cached_acl {
4458 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4460 struct nfs_inode *nfsi = NFS_I(inode);
4462 spin_lock(&inode->i_lock);
4463 kfree(nfsi->nfs4_acl);
4464 nfsi->nfs4_acl = acl;
4465 spin_unlock(&inode->i_lock);
4468 static void nfs4_zap_acl_attr(struct inode *inode)
4470 nfs4_set_cached_acl(inode, NULL);
4473 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4475 struct nfs_inode *nfsi = NFS_I(inode);
4476 struct nfs4_cached_acl *acl;
4479 spin_lock(&inode->i_lock);
4480 acl = nfsi->nfs4_acl;
4483 if (buf == NULL) /* user is just asking for length */
4485 if (acl->cached == 0)
4487 ret = -ERANGE; /* see getxattr(2) man page */
4488 if (acl->len > buflen)
4490 memcpy(buf, acl->data, acl->len);
4494 spin_unlock(&inode->i_lock);
4498 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
4500 struct nfs4_cached_acl *acl;
4501 size_t buflen = sizeof(*acl) + acl_len;
4503 if (buflen <= PAGE_SIZE) {
4504 acl = kmalloc(buflen, GFP_KERNEL);
4508 _copy_from_pages(acl->data, pages, pgbase, acl_len);
4510 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4517 nfs4_set_cached_acl(inode, acl);
4521 * The getxattr API returns the required buffer length when called with a
4522 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4523 * the required buf. On a NULL buf, we send a page of data to the server
4524 * guessing that the ACL request can be serviced by a page. If so, we cache
4525 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4526 * the cache. If not so, we throw away the page, and cache the required
4527 * length. The next getxattr call will then produce another round trip to
4528 * the server, this time with the input buf of the required size.
4530 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4532 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
4533 struct nfs_getaclargs args = {
4534 .fh = NFS_FH(inode),
4538 struct nfs_getaclres res = {
4541 struct rpc_message msg = {
4542 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4546 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4547 int ret = -ENOMEM, i;
4549 /* As long as we're doing a round trip to the server anyway,
4550 * let's be prepared for a page of acl data. */
4553 if (npages > ARRAY_SIZE(pages))
4556 for (i = 0; i < npages; i++) {
4557 pages[i] = alloc_page(GFP_KERNEL);
4562 /* for decoding across pages */
4563 res.acl_scratch = alloc_page(GFP_KERNEL);
4564 if (!res.acl_scratch)
4567 args.acl_len = npages * PAGE_SIZE;
4568 args.acl_pgbase = 0;
4570 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
4571 __func__, buf, buflen, npages, args.acl_len);
4572 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4573 &msg, &args.seq_args, &res.seq_res, 0);
4577 /* Handle the case where the passed-in buffer is too short */
4578 if (res.acl_flags & NFS4_ACL_TRUNC) {
4579 /* Did the user only issue a request for the acl length? */
4585 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
4587 if (res.acl_len > buflen) {
4591 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
4596 for (i = 0; i < npages; i++)
4598 __free_page(pages[i]);
4599 if (res.acl_scratch)
4600 __free_page(res.acl_scratch);
4604 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4606 struct nfs4_exception exception = { };
4609 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4610 trace_nfs4_get_acl(inode, ret);
4613 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4614 } while (exception.retry);
4618 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4620 struct nfs_server *server = NFS_SERVER(inode);
4623 if (!nfs4_server_supports_acls(server))
4625 ret = nfs_revalidate_inode(server, inode);
4628 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4629 nfs_zap_acl_cache(inode);
4630 ret = nfs4_read_cached_acl(inode, buf, buflen);
4632 /* -ENOENT is returned if there is no ACL or if there is an ACL
4633 * but no cached acl data, just the acl length */
4635 return nfs4_get_acl_uncached(inode, buf, buflen);
4638 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4640 struct nfs_server *server = NFS_SERVER(inode);
4641 struct page *pages[NFS4ACL_MAXPAGES];
4642 struct nfs_setaclargs arg = {
4643 .fh = NFS_FH(inode),
4647 struct nfs_setaclres res;
4648 struct rpc_message msg = {
4649 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4653 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4656 if (!nfs4_server_supports_acls(server))
4658 if (npages > ARRAY_SIZE(pages))
4660 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4663 nfs4_inode_return_delegation(inode);
4664 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4667 * Free each page after tx, so the only ref left is
4668 * held by the network stack
4671 put_page(pages[i-1]);
4674 * Acl update can result in inode attribute update.
4675 * so mark the attribute cache invalid.
4677 spin_lock(&inode->i_lock);
4678 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4679 spin_unlock(&inode->i_lock);
4680 nfs_access_zap_cache(inode);
4681 nfs_zap_acl_cache(inode);
4685 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4687 struct nfs4_exception exception = { };
4690 err = __nfs4_proc_set_acl(inode, buf, buflen);
4691 trace_nfs4_set_acl(inode, err);
4692 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4694 } while (exception.retry);
4698 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
4699 static int _nfs4_get_security_label(struct inode *inode, void *buf,
4702 struct nfs_server *server = NFS_SERVER(inode);
4703 struct nfs_fattr fattr;
4704 struct nfs4_label label = {0, 0, buflen, buf};
4706 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4707 struct nfs4_getattr_arg arg = {
4708 .fh = NFS_FH(inode),
4711 struct nfs4_getattr_res res = {
4716 struct rpc_message msg = {
4717 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4723 nfs_fattr_init(&fattr);
4725 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
4728 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4730 if (buflen < label.len)
4735 static int nfs4_get_security_label(struct inode *inode, void *buf,
4738 struct nfs4_exception exception = { };
4741 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4745 err = _nfs4_get_security_label(inode, buf, buflen);
4746 trace_nfs4_get_security_label(inode, err);
4747 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4749 } while (exception.retry);
4753 static int _nfs4_do_set_security_label(struct inode *inode,
4754 struct nfs4_label *ilabel,
4755 struct nfs_fattr *fattr,
4756 struct nfs4_label *olabel)
4759 struct iattr sattr = {0};
4760 struct nfs_server *server = NFS_SERVER(inode);
4761 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4762 struct nfs_setattrargs arg = {
4763 .fh = NFS_FH(inode),
4769 struct nfs_setattrres res = {
4774 struct rpc_message msg = {
4775 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
4781 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
4783 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4785 dprintk("%s failed: %d\n", __func__, status);
4790 static int nfs4_do_set_security_label(struct inode *inode,
4791 struct nfs4_label *ilabel,
4792 struct nfs_fattr *fattr,
4793 struct nfs4_label *olabel)
4795 struct nfs4_exception exception = { };
4799 err = _nfs4_do_set_security_label(inode, ilabel,
4801 trace_nfs4_set_security_label(inode, err);
4802 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4804 } while (exception.retry);
4809 nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4811 struct nfs4_label ilabel, *olabel = NULL;
4812 struct nfs_fattr fattr;
4813 struct rpc_cred *cred;
4814 struct inode *inode = dentry->d_inode;
4817 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4820 nfs_fattr_init(&fattr);
4824 ilabel.label = (char *)buf;
4825 ilabel.len = buflen;
4827 cred = rpc_lookup_cred();
4829 return PTR_ERR(cred);
4831 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4832 if (IS_ERR(olabel)) {
4833 status = -PTR_ERR(olabel);
4837 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4839 nfs_setsecurity(inode, &fattr, olabel);
4841 nfs4_label_free(olabel);
4846 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4850 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
4851 struct nfs4_state *state, long *timeout)
4853 struct nfs_client *clp = server->nfs_client;
4855 if (task->tk_status >= 0)
4857 switch(task->tk_status) {
4858 case -NFS4ERR_DELEG_REVOKED:
4859 case -NFS4ERR_ADMIN_REVOKED:
4860 case -NFS4ERR_BAD_STATEID:
4861 case -NFS4ERR_OPENMODE:
4864 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4865 goto recovery_failed;
4866 goto wait_on_recovery;
4867 case -NFS4ERR_EXPIRED:
4868 if (state != NULL) {
4869 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4870 goto recovery_failed;
4872 case -NFS4ERR_STALE_STATEID:
4873 case -NFS4ERR_STALE_CLIENTID:
4874 nfs4_schedule_lease_recovery(clp);
4875 goto wait_on_recovery;
4876 case -NFS4ERR_MOVED:
4877 if (nfs4_schedule_migration_recovery(server) < 0)
4878 goto recovery_failed;
4879 goto wait_on_recovery;
4880 case -NFS4ERR_LEASE_MOVED:
4881 nfs4_schedule_lease_moved_recovery(clp);
4882 goto wait_on_recovery;
4883 #if defined(CONFIG_NFS_V4_1)
4884 case -NFS4ERR_BADSESSION:
4885 case -NFS4ERR_BADSLOT:
4886 case -NFS4ERR_BAD_HIGH_SLOT:
4887 case -NFS4ERR_DEADSESSION:
4888 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4889 case -NFS4ERR_SEQ_FALSE_RETRY:
4890 case -NFS4ERR_SEQ_MISORDERED:
4891 dprintk("%s ERROR %d, Reset session\n", __func__,
4893 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4894 goto wait_on_recovery;
4895 #endif /* CONFIG_NFS_V4_1 */
4896 case -NFS4ERR_DELAY:
4897 nfs_inc_server_stats(server, NFSIOS_DELAY);
4898 rpc_delay(task, nfs4_update_delay(timeout));
4900 case -NFS4ERR_GRACE:
4901 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4902 case -NFS4ERR_RETRY_UNCACHED_REP:
4903 case -NFS4ERR_OLD_STATEID:
4906 task->tk_status = nfs4_map_errors(task->tk_status);
4909 task->tk_status = -EIO;
4912 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
4913 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4914 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4915 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4916 goto recovery_failed;
4918 task->tk_status = 0;
4922 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4923 nfs4_verifier *bootverf)
4927 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4928 /* An impossible timestamp guarantees this value
4929 * will never match a generated boot time. */
4931 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
4933 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4934 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4935 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
4937 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4941 nfs4_init_nonuniform_client_string(struct nfs_client *clp,
4942 char *buf, size_t len)
4944 unsigned int result;
4946 if (clp->cl_owner_id != NULL)
4947 return strlcpy(buf, clp->cl_owner_id, len);
4950 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4952 rpc_peeraddr2str(clp->cl_rpcclient,
4954 rpc_peeraddr2str(clp->cl_rpcclient,
4955 RPC_DISPLAY_PROTO));
4957 clp->cl_owner_id = kstrdup(buf, GFP_KERNEL);
4962 nfs4_init_uniform_client_string(struct nfs_client *clp,
4963 char *buf, size_t len)
4965 const char *nodename = clp->cl_rpcclient->cl_nodename;
4966 unsigned int result;
4968 if (clp->cl_owner_id != NULL)
4969 return strlcpy(buf, clp->cl_owner_id, len);
4971 if (nfs4_client_id_uniquifier[0] != '\0')
4972 result = scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4973 clp->rpc_ops->version,
4974 clp->cl_minorversion,
4975 nfs4_client_id_uniquifier,
4978 result = scnprintf(buf, len, "Linux NFSv%u.%u %s",
4979 clp->rpc_ops->version, clp->cl_minorversion,
4981 clp->cl_owner_id = kstrdup(buf, GFP_KERNEL);
4986 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
4987 * services. Advertise one based on the address family of the
4991 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
4993 if (strchr(clp->cl_ipaddr, ':') != NULL)
4994 return scnprintf(buf, len, "tcp6");
4996 return scnprintf(buf, len, "tcp");
4999 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5001 struct nfs4_setclientid *sc = calldata;
5003 if (task->tk_status == 0)
5004 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5007 static const struct rpc_call_ops nfs4_setclientid_ops = {
5008 .rpc_call_done = nfs4_setclientid_done,
5012 * nfs4_proc_setclientid - Negotiate client ID
5013 * @clp: state data structure
5014 * @program: RPC program for NFSv4 callback service
5015 * @port: IP port number for NFS4 callback service
5016 * @cred: RPC credential to use for this call
5017 * @res: where to place the result
5019 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5021 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5022 unsigned short port, struct rpc_cred *cred,
5023 struct nfs4_setclientid_res *res)
5025 nfs4_verifier sc_verifier;
5026 struct nfs4_setclientid setclientid = {
5027 .sc_verifier = &sc_verifier,
5029 .sc_cb_ident = clp->cl_cb_ident,
5031 struct rpc_message msg = {
5032 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5033 .rpc_argp = &setclientid,
5037 struct rpc_task *task;
5038 struct rpc_task_setup task_setup_data = {
5039 .rpc_client = clp->cl_rpcclient,
5040 .rpc_message = &msg,
5041 .callback_ops = &nfs4_setclientid_ops,
5042 .callback_data = &setclientid,
5043 .flags = RPC_TASK_TIMEOUT,
5047 /* nfs_client_id4 */
5048 nfs4_init_boot_verifier(clp, &sc_verifier);
5049 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5050 setclientid.sc_name_len =
5051 nfs4_init_uniform_client_string(clp,
5052 setclientid.sc_name,
5053 sizeof(setclientid.sc_name));
5055 setclientid.sc_name_len =
5056 nfs4_init_nonuniform_client_string(clp,
5057 setclientid.sc_name,
5058 sizeof(setclientid.sc_name));
5060 setclientid.sc_netid_len =
5061 nfs4_init_callback_netid(clp,
5062 setclientid.sc_netid,
5063 sizeof(setclientid.sc_netid));
5064 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
5065 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
5066 clp->cl_ipaddr, port >> 8, port & 255);
5068 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
5069 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5070 setclientid.sc_name_len, setclientid.sc_name);
5071 task = rpc_run_task(&task_setup_data);
5073 status = PTR_ERR(task);
5076 status = task->tk_status;
5077 if (setclientid.sc_cred) {
5078 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5079 put_rpccred(setclientid.sc_cred);
5083 trace_nfs4_setclientid(clp, status);
5084 dprintk("NFS reply setclientid: %d\n", status);
5089 * nfs4_proc_setclientid_confirm - Confirm client ID
5090 * @clp: state data structure
5091 * @res: result of a previous SETCLIENTID
5092 * @cred: RPC credential to use for this call
5094 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5096 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
5097 struct nfs4_setclientid_res *arg,
5098 struct rpc_cred *cred)
5100 struct rpc_message msg = {
5101 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
5107 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5108 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5110 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5111 trace_nfs4_setclientid_confirm(clp, status);
5112 dprintk("NFS reply setclientid_confirm: %d\n", status);
5116 struct nfs4_delegreturndata {
5117 struct nfs4_delegreturnargs args;
5118 struct nfs4_delegreturnres res;
5120 nfs4_stateid stateid;
5121 unsigned long timestamp;
5122 struct nfs_fattr fattr;
5124 struct inode *inode;
5129 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5131 struct nfs4_delegreturndata *data = calldata;
5133 if (!nfs4_sequence_done(task, &data->res.seq_res))
5136 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
5137 switch (task->tk_status) {
5139 renew_lease(data->res.server, data->timestamp);
5140 case -NFS4ERR_ADMIN_REVOKED:
5141 case -NFS4ERR_DELEG_REVOKED:
5142 case -NFS4ERR_BAD_STATEID:
5143 case -NFS4ERR_OLD_STATEID:
5144 case -NFS4ERR_STALE_STATEID:
5145 case -NFS4ERR_EXPIRED:
5146 task->tk_status = 0;
5148 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
5151 if (nfs4_async_handle_error(task, data->res.server,
5152 NULL, NULL) == -EAGAIN) {
5153 rpc_restart_call_prepare(task);
5157 data->rpc_status = task->tk_status;
5160 static void nfs4_delegreturn_release(void *calldata)
5162 struct nfs4_delegreturndata *data = calldata;
5165 pnfs_roc_release(data->inode);
5169 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5171 struct nfs4_delegreturndata *d_data;
5173 d_data = (struct nfs4_delegreturndata *)data;
5176 pnfs_roc_drain(d_data->inode, &d_data->roc_barrier, task))
5179 nfs4_setup_sequence(d_data->res.server,
5180 &d_data->args.seq_args,
5181 &d_data->res.seq_res,
5185 static const struct rpc_call_ops nfs4_delegreturn_ops = {
5186 .rpc_call_prepare = nfs4_delegreturn_prepare,
5187 .rpc_call_done = nfs4_delegreturn_done,
5188 .rpc_release = nfs4_delegreturn_release,
5191 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5193 struct nfs4_delegreturndata *data;
5194 struct nfs_server *server = NFS_SERVER(inode);
5195 struct rpc_task *task;
5196 struct rpc_message msg = {
5197 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5200 struct rpc_task_setup task_setup_data = {
5201 .rpc_client = server->client,
5202 .rpc_message = &msg,
5203 .callback_ops = &nfs4_delegreturn_ops,
5204 .flags = RPC_TASK_ASYNC,
5208 data = kzalloc(sizeof(*data), GFP_NOFS);
5211 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
5212 data->args.fhandle = &data->fh;
5213 data->args.stateid = &data->stateid;
5214 data->args.bitmask = server->cache_consistency_bitmask;
5215 nfs_copy_fh(&data->fh, NFS_FH(inode));
5216 nfs4_stateid_copy(&data->stateid, stateid);
5217 data->res.fattr = &data->fattr;
5218 data->res.server = server;
5219 nfs_fattr_init(data->res.fattr);
5220 data->timestamp = jiffies;
5221 data->rpc_status = 0;
5222 data->inode = inode;
5223 data->roc = list_empty(&NFS_I(inode)->open_files) ?
5224 pnfs_roc(inode) : false;
5226 task_setup_data.callback_data = data;
5227 msg.rpc_argp = &data->args;
5228 msg.rpc_resp = &data->res;
5229 task = rpc_run_task(&task_setup_data);
5231 return PTR_ERR(task);
5234 status = nfs4_wait_for_completion_rpc_task(task);
5237 status = data->rpc_status;
5239 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5241 nfs_refresh_inode(inode, &data->fattr);
5247 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5249 struct nfs_server *server = NFS_SERVER(inode);
5250 struct nfs4_exception exception = { };
5253 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
5254 trace_nfs4_delegreturn(inode, err);
5256 case -NFS4ERR_STALE_STATEID:
5257 case -NFS4ERR_EXPIRED:
5261 err = nfs4_handle_exception(server, err, &exception);
5262 } while (exception.retry);
5266 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5267 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5270 * sleep, with exponential backoff, and retry the LOCK operation.
5272 static unsigned long
5273 nfs4_set_lock_task_retry(unsigned long timeout)
5275 freezable_schedule_timeout_killable_unsafe(timeout);
5277 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5278 return NFS4_LOCK_MAXTIMEOUT;
5282 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5284 struct inode *inode = state->inode;
5285 struct nfs_server *server = NFS_SERVER(inode);
5286 struct nfs_client *clp = server->nfs_client;
5287 struct nfs_lockt_args arg = {
5288 .fh = NFS_FH(inode),
5291 struct nfs_lockt_res res = {
5294 struct rpc_message msg = {
5295 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5298 .rpc_cred = state->owner->so_cred,
5300 struct nfs4_lock_state *lsp;
5303 arg.lock_owner.clientid = clp->cl_clientid;
5304 status = nfs4_set_lock_state(state, request);
5307 lsp = request->fl_u.nfs4_fl.owner;
5308 arg.lock_owner.id = lsp->ls_seqid.owner_id;
5309 arg.lock_owner.s_dev = server->s_dev;
5310 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5313 request->fl_type = F_UNLCK;
5315 case -NFS4ERR_DENIED:
5318 request->fl_ops->fl_release_private(request);
5319 request->fl_ops = NULL;
5324 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5326 struct nfs4_exception exception = { };
5330 err = _nfs4_proc_getlk(state, cmd, request);
5331 trace_nfs4_get_lock(request, state, cmd, err);
5332 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
5334 } while (exception.retry);
5338 static int do_vfs_lock(struct file *file, struct file_lock *fl)
5341 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5343 res = posix_lock_file_wait(file, fl);
5346 res = flock_lock_file_wait(file, fl);
5354 struct nfs4_unlockdata {
5355 struct nfs_locku_args arg;
5356 struct nfs_locku_res res;
5357 struct nfs4_lock_state *lsp;
5358 struct nfs_open_context *ctx;
5359 struct file_lock fl;
5360 const struct nfs_server *server;
5361 unsigned long timestamp;
5364 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5365 struct nfs_open_context *ctx,
5366 struct nfs4_lock_state *lsp,
5367 struct nfs_seqid *seqid)
5369 struct nfs4_unlockdata *p;
5370 struct inode *inode = lsp->ls_state->inode;
5372 p = kzalloc(sizeof(*p), GFP_NOFS);
5375 p->arg.fh = NFS_FH(inode);
5377 p->arg.seqid = seqid;
5378 p->res.seqid = seqid;
5379 p->arg.stateid = &lsp->ls_stateid;
5381 atomic_inc(&lsp->ls_count);
5382 /* Ensure we don't close file until we're done freeing locks! */
5383 p->ctx = get_nfs_open_context(ctx);
5384 memcpy(&p->fl, fl, sizeof(p->fl));
5385 p->server = NFS_SERVER(inode);
5389 static void nfs4_locku_release_calldata(void *data)
5391 struct nfs4_unlockdata *calldata = data;
5392 nfs_free_seqid(calldata->arg.seqid);
5393 nfs4_put_lock_state(calldata->lsp);
5394 put_nfs_open_context(calldata->ctx);
5398 static void nfs4_locku_done(struct rpc_task *task, void *data)
5400 struct nfs4_unlockdata *calldata = data;
5402 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5404 switch (task->tk_status) {
5406 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5407 &calldata->res.stateid);
5408 renew_lease(calldata->server, calldata->timestamp);
5410 case -NFS4ERR_BAD_STATEID:
5411 case -NFS4ERR_OLD_STATEID:
5412 case -NFS4ERR_STALE_STATEID:
5413 case -NFS4ERR_EXPIRED:
5416 if (nfs4_async_handle_error(task, calldata->server,
5417 NULL, NULL) == -EAGAIN)
5418 rpc_restart_call_prepare(task);
5420 nfs_release_seqid(calldata->arg.seqid);
5423 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
5425 struct nfs4_unlockdata *calldata = data;
5427 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
5429 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
5430 /* Note: exit _without_ running nfs4_locku_done */
5433 calldata->timestamp = jiffies;
5434 if (nfs4_setup_sequence(calldata->server,
5435 &calldata->arg.seq_args,
5436 &calldata->res.seq_res,
5438 nfs_release_seqid(calldata->arg.seqid);
5441 task->tk_action = NULL;
5443 nfs4_sequence_done(task, &calldata->res.seq_res);
5446 static const struct rpc_call_ops nfs4_locku_ops = {
5447 .rpc_call_prepare = nfs4_locku_prepare,
5448 .rpc_call_done = nfs4_locku_done,
5449 .rpc_release = nfs4_locku_release_calldata,
5452 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5453 struct nfs_open_context *ctx,
5454 struct nfs4_lock_state *lsp,
5455 struct nfs_seqid *seqid)
5457 struct nfs4_unlockdata *data;
5458 struct rpc_message msg = {
5459 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5460 .rpc_cred = ctx->cred,
5462 struct rpc_task_setup task_setup_data = {
5463 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5464 .rpc_message = &msg,
5465 .callback_ops = &nfs4_locku_ops,
5466 .workqueue = nfsiod_workqueue,
5467 .flags = RPC_TASK_ASYNC,
5470 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5471 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5473 /* Ensure this is an unlock - when canceling a lock, the
5474 * canceled lock is passed in, and it won't be an unlock.
5476 fl->fl_type = F_UNLCK;
5478 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5480 nfs_free_seqid(seqid);
5481 return ERR_PTR(-ENOMEM);
5484 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5485 msg.rpc_argp = &data->arg;
5486 msg.rpc_resp = &data->res;
5487 task_setup_data.callback_data = data;
5488 return rpc_run_task(&task_setup_data);
5491 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5493 struct inode *inode = state->inode;
5494 struct nfs4_state_owner *sp = state->owner;
5495 struct nfs_inode *nfsi = NFS_I(inode);
5496 struct nfs_seqid *seqid;
5497 struct nfs4_lock_state *lsp;
5498 struct rpc_task *task;
5500 unsigned char fl_flags = request->fl_flags;
5502 status = nfs4_set_lock_state(state, request);
5503 /* Unlock _before_ we do the RPC call */
5504 request->fl_flags |= FL_EXISTS;
5505 /* Exclude nfs_delegation_claim_locks() */
5506 mutex_lock(&sp->so_delegreturn_mutex);
5507 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
5508 down_read(&nfsi->rwsem);
5509 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5510 up_read(&nfsi->rwsem);
5511 mutex_unlock(&sp->so_delegreturn_mutex);
5514 up_read(&nfsi->rwsem);
5515 mutex_unlock(&sp->so_delegreturn_mutex);
5518 /* Is this a delegated lock? */
5519 lsp = request->fl_u.nfs4_fl.owner;
5520 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5522 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
5526 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
5527 status = PTR_ERR(task);
5530 status = nfs4_wait_for_completion_rpc_task(task);
5533 request->fl_flags = fl_flags;
5534 trace_nfs4_unlock(request, state, F_SETLK, status);
5538 struct nfs4_lockdata {
5539 struct nfs_lock_args arg;
5540 struct nfs_lock_res res;
5541 struct nfs4_lock_state *lsp;
5542 struct nfs_open_context *ctx;
5543 struct file_lock fl;
5544 unsigned long timestamp;
5547 struct nfs_server *server;
5550 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
5551 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5554 struct nfs4_lockdata *p;
5555 struct inode *inode = lsp->ls_state->inode;
5556 struct nfs_server *server = NFS_SERVER(inode);
5558 p = kzalloc(sizeof(*p), gfp_mask);
5562 p->arg.fh = NFS_FH(inode);
5564 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
5565 if (IS_ERR(p->arg.open_seqid))
5567 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
5568 if (IS_ERR(p->arg.lock_seqid))
5569 goto out_free_seqid;
5570 p->arg.lock_stateid = &lsp->ls_stateid;
5571 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
5572 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
5573 p->arg.lock_owner.s_dev = server->s_dev;
5574 p->res.lock_seqid = p->arg.lock_seqid;
5577 atomic_inc(&lsp->ls_count);
5578 p->ctx = get_nfs_open_context(ctx);
5579 memcpy(&p->fl, fl, sizeof(p->fl));
5582 nfs_free_seqid(p->arg.open_seqid);
5588 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5590 struct nfs4_lockdata *data = calldata;
5591 struct nfs4_state *state = data->lsp->ls_state;
5593 dprintk("%s: begin!\n", __func__);
5594 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
5596 /* Do we need to do an open_to_lock_owner? */
5597 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
5598 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
5599 goto out_release_lock_seqid;
5601 data->arg.open_stateid = &state->open_stateid;
5602 data->arg.new_lock_owner = 1;
5603 data->res.open_seqid = data->arg.open_seqid;
5605 data->arg.new_lock_owner = 0;
5606 if (!nfs4_valid_open_stateid(state)) {
5607 data->rpc_status = -EBADF;
5608 task->tk_action = NULL;
5609 goto out_release_open_seqid;
5611 data->timestamp = jiffies;
5612 if (nfs4_setup_sequence(data->server,
5613 &data->arg.seq_args,
5617 out_release_open_seqid:
5618 nfs_release_seqid(data->arg.open_seqid);
5619 out_release_lock_seqid:
5620 nfs_release_seqid(data->arg.lock_seqid);
5622 nfs4_sequence_done(task, &data->res.seq_res);
5623 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
5626 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5628 struct nfs4_lockdata *data = calldata;
5630 dprintk("%s: begin!\n", __func__);
5632 if (!nfs4_sequence_done(task, &data->res.seq_res))
5635 data->rpc_status = task->tk_status;
5636 if (data->arg.new_lock_owner != 0) {
5637 if (data->rpc_status == 0)
5638 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5642 if (data->rpc_status == 0) {
5643 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
5644 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
5645 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
5648 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
5651 static void nfs4_lock_release(void *calldata)
5653 struct nfs4_lockdata *data = calldata;
5655 dprintk("%s: begin!\n", __func__);
5656 nfs_free_seqid(data->arg.open_seqid);
5657 if (data->cancelled != 0) {
5658 struct rpc_task *task;
5659 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5660 data->arg.lock_seqid);
5662 rpc_put_task_async(task);
5663 dprintk("%s: cancelling lock!\n", __func__);
5665 nfs_free_seqid(data->arg.lock_seqid);
5666 nfs4_put_lock_state(data->lsp);
5667 put_nfs_open_context(data->ctx);
5669 dprintk("%s: done!\n", __func__);
5672 static const struct rpc_call_ops nfs4_lock_ops = {
5673 .rpc_call_prepare = nfs4_lock_prepare,
5674 .rpc_call_done = nfs4_lock_done,
5675 .rpc_release = nfs4_lock_release,
5678 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5681 case -NFS4ERR_ADMIN_REVOKED:
5682 case -NFS4ERR_BAD_STATEID:
5683 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
5684 if (new_lock_owner != 0 ||
5685 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
5686 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
5688 case -NFS4ERR_STALE_STATEID:
5689 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
5690 case -NFS4ERR_EXPIRED:
5691 nfs4_schedule_lease_recovery(server->nfs_client);
5695 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
5697 struct nfs4_lockdata *data;
5698 struct rpc_task *task;
5699 struct rpc_message msg = {
5700 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5701 .rpc_cred = state->owner->so_cred,
5703 struct rpc_task_setup task_setup_data = {
5704 .rpc_client = NFS_CLIENT(state->inode),
5705 .rpc_message = &msg,
5706 .callback_ops = &nfs4_lock_ops,
5707 .workqueue = nfsiod_workqueue,
5708 .flags = RPC_TASK_ASYNC,
5712 dprintk("%s: begin!\n", __func__);
5713 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
5714 fl->fl_u.nfs4_fl.owner,
5715 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
5719 data->arg.block = 1;
5720 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5721 msg.rpc_argp = &data->arg;
5722 msg.rpc_resp = &data->res;
5723 task_setup_data.callback_data = data;
5724 if (recovery_type > NFS_LOCK_NEW) {
5725 if (recovery_type == NFS_LOCK_RECLAIM)
5726 data->arg.reclaim = NFS_LOCK_RECLAIM;
5727 nfs4_set_sequence_privileged(&data->arg.seq_args);
5729 task = rpc_run_task(&task_setup_data);
5731 return PTR_ERR(task);
5732 ret = nfs4_wait_for_completion_rpc_task(task);
5734 ret = data->rpc_status;
5736 nfs4_handle_setlk_error(data->server, data->lsp,
5737 data->arg.new_lock_owner, ret);
5739 data->cancelled = 1;
5741 dprintk("%s: done, ret = %d!\n", __func__, ret);
5745 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5747 struct nfs_server *server = NFS_SERVER(state->inode);
5748 struct nfs4_exception exception = {
5749 .inode = state->inode,
5754 /* Cache the lock if possible... */
5755 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5757 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
5758 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
5759 if (err != -NFS4ERR_DELAY)
5761 nfs4_handle_exception(server, err, &exception);
5762 } while (exception.retry);
5766 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5768 struct nfs_server *server = NFS_SERVER(state->inode);
5769 struct nfs4_exception exception = {
5770 .inode = state->inode,
5774 err = nfs4_set_lock_state(state, request);
5777 if (!recover_lost_locks) {
5778 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5782 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5784 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
5785 trace_nfs4_lock_expired(request, state, F_SETLK, err);
5789 case -NFS4ERR_GRACE:
5790 case -NFS4ERR_DELAY:
5791 nfs4_handle_exception(server, err, &exception);
5794 } while (exception.retry);
5799 #if defined(CONFIG_NFS_V4_1)
5801 * nfs41_check_expired_locks - possibly free a lock stateid
5803 * @state: NFSv4 state for an inode
5805 * Returns NFS_OK if recovery for this stateid is now finished.
5806 * Otherwise a negative NFS4ERR value is returned.
5808 static int nfs41_check_expired_locks(struct nfs4_state *state)
5810 int status, ret = -NFS4ERR_BAD_STATEID;
5811 struct nfs4_lock_state *lsp;
5812 struct nfs_server *server = NFS_SERVER(state->inode);
5814 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
5815 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
5816 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5818 status = nfs41_test_stateid(server,
5821 trace_nfs4_test_lock_stateid(state, lsp, status);
5822 if (status != NFS_OK) {
5823 /* Free the stateid unless the server
5824 * informs us the stateid is unrecognized. */
5825 if (status != -NFS4ERR_BAD_STATEID)
5826 nfs41_free_stateid(server,
5829 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5838 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5840 int status = NFS_OK;
5842 if (test_bit(LK_STATE_IN_USE, &state->flags))
5843 status = nfs41_check_expired_locks(state);
5844 if (status != NFS_OK)
5845 status = nfs4_lock_expired(state, request);
5850 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5852 struct nfs4_state_owner *sp = state->owner;
5853 struct nfs_inode *nfsi = NFS_I(state->inode);
5854 unsigned char fl_flags = request->fl_flags;
5856 int status = -ENOLCK;
5858 if ((fl_flags & FL_POSIX) &&
5859 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5861 /* Is this a delegated open? */
5862 status = nfs4_set_lock_state(state, request);
5865 request->fl_flags |= FL_ACCESS;
5866 status = do_vfs_lock(request->fl_file, request);
5869 down_read(&nfsi->rwsem);
5870 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
5871 /* Yes: cache locks! */
5872 /* ...but avoid races with delegation recall... */
5873 request->fl_flags = fl_flags & ~FL_SLEEP;
5874 status = do_vfs_lock(request->fl_file, request);
5877 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5878 up_read(&nfsi->rwsem);
5879 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
5882 down_read(&nfsi->rwsem);
5883 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5884 status = -NFS4ERR_DELAY;
5887 /* Note: we always want to sleep here! */
5888 request->fl_flags = fl_flags | FL_SLEEP;
5889 if (do_vfs_lock(request->fl_file, request) < 0)
5890 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5891 "manager!\n", __func__);
5893 up_read(&nfsi->rwsem);
5895 request->fl_flags = fl_flags;
5899 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5901 struct nfs4_exception exception = {
5903 .inode = state->inode,
5908 err = _nfs4_proc_setlk(state, cmd, request);
5909 trace_nfs4_set_lock(request, state, cmd, err);
5910 if (err == -NFS4ERR_DENIED)
5912 err = nfs4_handle_exception(NFS_SERVER(state->inode),
5914 } while (exception.retry);
5919 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5921 struct nfs_open_context *ctx;
5922 struct nfs4_state *state;
5923 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5926 /* verify open state */
5927 ctx = nfs_file_open_context(filp);
5930 if (request->fl_start < 0 || request->fl_end < 0)
5933 if (IS_GETLK(cmd)) {
5935 return nfs4_proc_getlk(state, F_GETLK, request);
5939 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5942 if (request->fl_type == F_UNLCK) {
5944 return nfs4_proc_unlck(state, cmd, request);
5951 * Don't rely on the VFS having checked the file open mode,
5952 * since it won't do this for flock() locks.
5954 switch (request->fl_type) {
5956 if (!(filp->f_mode & FMODE_READ))
5960 if (!(filp->f_mode & FMODE_WRITE))
5965 status = nfs4_proc_setlk(state, cmd, request);
5966 if ((status != -EAGAIN) || IS_SETLK(cmd))
5968 timeout = nfs4_set_lock_task_retry(timeout);
5969 status = -ERESTARTSYS;
5972 } while(status < 0);
5976 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
5978 struct nfs_server *server = NFS_SERVER(state->inode);
5981 err = nfs4_set_lock_state(state, fl);
5984 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
5985 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
5988 struct nfs_release_lockowner_data {
5989 struct nfs4_lock_state *lsp;
5990 struct nfs_server *server;
5991 struct nfs_release_lockowner_args args;
5992 struct nfs_release_lockowner_res res;
5993 unsigned long timestamp;
5996 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
5998 struct nfs_release_lockowner_data *data = calldata;
5999 struct nfs_server *server = data->server;
6000 nfs40_setup_sequence(server, &data->args.seq_args,
6001 &data->res.seq_res, task);
6002 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6003 data->timestamp = jiffies;
6006 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6008 struct nfs_release_lockowner_data *data = calldata;
6009 struct nfs_server *server = data->server;
6011 nfs40_sequence_done(task, &data->res.seq_res);
6013 switch (task->tk_status) {
6015 renew_lease(server, data->timestamp);
6017 case -NFS4ERR_STALE_CLIENTID:
6018 case -NFS4ERR_EXPIRED:
6019 nfs4_schedule_lease_recovery(server->nfs_client);
6021 case -NFS4ERR_LEASE_MOVED:
6022 case -NFS4ERR_DELAY:
6023 if (nfs4_async_handle_error(task, server,
6024 NULL, NULL) == -EAGAIN)
6025 rpc_restart_call_prepare(task);
6029 static void nfs4_release_lockowner_release(void *calldata)
6031 struct nfs_release_lockowner_data *data = calldata;
6032 nfs4_free_lock_state(data->server, data->lsp);
6036 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
6037 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6038 .rpc_call_done = nfs4_release_lockowner_done,
6039 .rpc_release = nfs4_release_lockowner_release,
6043 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
6045 struct nfs_release_lockowner_data *data;
6046 struct rpc_message msg = {
6047 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6050 if (server->nfs_client->cl_mvops->minor_version != 0)
6053 data = kmalloc(sizeof(*data), GFP_NOFS);
6057 data->server = server;
6058 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6059 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6060 data->args.lock_owner.s_dev = server->s_dev;
6062 msg.rpc_argp = &data->args;
6063 msg.rpc_resp = &data->res;
6064 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
6065 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
6068 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6070 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6071 const void *buf, size_t buflen,
6072 int flags, int type)
6074 if (strcmp(key, "") != 0)
6077 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6080 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6081 void *buf, size_t buflen, int type)
6083 if (strcmp(key, "") != 0)
6086 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6089 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6090 size_t list_len, const char *name,
6091 size_t name_len, int type)
6093 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6095 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
6098 if (list && len <= list_len)
6099 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
6103 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
6104 static inline int nfs4_server_supports_labels(struct nfs_server *server)
6106 return server->caps & NFS_CAP_SECURITY_LABEL;
6109 static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6110 const void *buf, size_t buflen,
6111 int flags, int type)
6113 if (security_ismaclabel(key))
6114 return nfs4_set_security_label(dentry, buf, buflen);
6119 static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6120 void *buf, size_t buflen, int type)
6122 if (security_ismaclabel(key))
6123 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
6127 static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6128 size_t list_len, const char *name,
6129 size_t name_len, int type)
6133 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
6134 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
6135 if (list && len <= list_len)
6136 security_inode_listsecurity(dentry->d_inode, list, len);
6141 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6142 .prefix = XATTR_SECURITY_PREFIX,
6143 .list = nfs4_xattr_list_nfs4_label,
6144 .get = nfs4_xattr_get_nfs4_label,
6145 .set = nfs4_xattr_set_nfs4_label,
6151 * nfs_fhget will use either the mounted_on_fileid or the fileid
6153 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6155 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6156 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6157 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
6158 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
6161 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
6162 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
6163 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6167 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6168 const struct qstr *name,
6169 struct nfs4_fs_locations *fs_locations,
6172 struct nfs_server *server = NFS_SERVER(dir);
6174 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6176 struct nfs4_fs_locations_arg args = {
6177 .dir_fh = NFS_FH(dir),
6182 struct nfs4_fs_locations_res res = {
6183 .fs_locations = fs_locations,
6185 struct rpc_message msg = {
6186 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6192 dprintk("%s: start\n", __func__);
6194 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6195 * is not supported */
6196 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6197 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6199 bitmask[0] |= FATTR4_WORD0_FILEID;
6201 nfs_fattr_init(&fs_locations->fattr);
6202 fs_locations->server = server;
6203 fs_locations->nlocations = 0;
6204 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
6205 dprintk("%s: returned status = %d\n", __func__, status);
6209 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6210 const struct qstr *name,
6211 struct nfs4_fs_locations *fs_locations,
6214 struct nfs4_exception exception = { };
6217 err = _nfs4_proc_fs_locations(client, dir, name,
6218 fs_locations, page);
6219 trace_nfs4_get_fs_locations(dir, name, err);
6220 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6222 } while (exception.retry);
6227 * This operation also signals the server that this client is
6228 * performing migration recovery. The server can stop returning
6229 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6230 * appended to this compound to identify the client ID which is
6231 * performing recovery.
6233 static int _nfs40_proc_get_locations(struct inode *inode,
6234 struct nfs4_fs_locations *locations,
6235 struct page *page, struct rpc_cred *cred)
6237 struct nfs_server *server = NFS_SERVER(inode);
6238 struct rpc_clnt *clnt = server->client;
6240 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6242 struct nfs4_fs_locations_arg args = {
6243 .clientid = server->nfs_client->cl_clientid,
6244 .fh = NFS_FH(inode),
6247 .migration = 1, /* skip LOOKUP */
6248 .renew = 1, /* append RENEW */
6250 struct nfs4_fs_locations_res res = {
6251 .fs_locations = locations,
6255 struct rpc_message msg = {
6256 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6261 unsigned long now = jiffies;
6264 nfs_fattr_init(&locations->fattr);
6265 locations->server = server;
6266 locations->nlocations = 0;
6268 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6269 nfs4_set_sequence_privileged(&args.seq_args);
6270 status = nfs4_call_sync_sequence(clnt, server, &msg,
6271 &args.seq_args, &res.seq_res);
6275 renew_lease(server, now);
6279 #ifdef CONFIG_NFS_V4_1
6282 * This operation also signals the server that this client is
6283 * performing migration recovery. The server can stop asserting
6284 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6285 * performing this operation is identified in the SEQUENCE
6286 * operation in this compound.
6288 * When the client supports GETATTR(fs_locations_info), it can
6289 * be plumbed in here.
6291 static int _nfs41_proc_get_locations(struct inode *inode,
6292 struct nfs4_fs_locations *locations,
6293 struct page *page, struct rpc_cred *cred)
6295 struct nfs_server *server = NFS_SERVER(inode);
6296 struct rpc_clnt *clnt = server->client;
6298 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6300 struct nfs4_fs_locations_arg args = {
6301 .fh = NFS_FH(inode),
6304 .migration = 1, /* skip LOOKUP */
6306 struct nfs4_fs_locations_res res = {
6307 .fs_locations = locations,
6310 struct rpc_message msg = {
6311 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6318 nfs_fattr_init(&locations->fattr);
6319 locations->server = server;
6320 locations->nlocations = 0;
6322 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6323 nfs4_set_sequence_privileged(&args.seq_args);
6324 status = nfs4_call_sync_sequence(clnt, server, &msg,
6325 &args.seq_args, &res.seq_res);
6326 if (status == NFS4_OK &&
6327 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6328 status = -NFS4ERR_LEASE_MOVED;
6332 #endif /* CONFIG_NFS_V4_1 */
6335 * nfs4_proc_get_locations - discover locations for a migrated FSID
6336 * @inode: inode on FSID that is migrating
6337 * @locations: result of query
6339 * @cred: credential to use for this operation
6341 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6342 * operation failed, or a negative errno if a local error occurred.
6344 * On success, "locations" is filled in, but if the server has
6345 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6348 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6349 * from this client that require migration recovery.
6351 int nfs4_proc_get_locations(struct inode *inode,
6352 struct nfs4_fs_locations *locations,
6353 struct page *page, struct rpc_cred *cred)
6355 struct nfs_server *server = NFS_SERVER(inode);
6356 struct nfs_client *clp = server->nfs_client;
6357 const struct nfs4_mig_recovery_ops *ops =
6358 clp->cl_mvops->mig_recovery_ops;
6359 struct nfs4_exception exception = { };
6362 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6363 (unsigned long long)server->fsid.major,
6364 (unsigned long long)server->fsid.minor,
6366 nfs_display_fhandle(NFS_FH(inode), __func__);
6369 status = ops->get_locations(inode, locations, page, cred);
6370 if (status != -NFS4ERR_DELAY)
6372 nfs4_handle_exception(server, status, &exception);
6373 } while (exception.retry);
6378 * This operation also signals the server that this client is
6379 * performing "lease moved" recovery. The server can stop
6380 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6381 * is appended to this compound to identify the client ID which is
6382 * performing recovery.
6384 static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6386 struct nfs_server *server = NFS_SERVER(inode);
6387 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6388 struct rpc_clnt *clnt = server->client;
6389 struct nfs4_fsid_present_arg args = {
6390 .fh = NFS_FH(inode),
6391 .clientid = clp->cl_clientid,
6392 .renew = 1, /* append RENEW */
6394 struct nfs4_fsid_present_res res = {
6397 struct rpc_message msg = {
6398 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6403 unsigned long now = jiffies;
6406 res.fh = nfs_alloc_fhandle();
6410 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6411 nfs4_set_sequence_privileged(&args.seq_args);
6412 status = nfs4_call_sync_sequence(clnt, server, &msg,
6413 &args.seq_args, &res.seq_res);
6414 nfs_free_fhandle(res.fh);
6418 do_renew_lease(clp, now);
6422 #ifdef CONFIG_NFS_V4_1
6425 * This operation also signals the server that this client is
6426 * performing "lease moved" recovery. The server can stop asserting
6427 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6428 * this operation is identified in the SEQUENCE operation in this
6431 static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6433 struct nfs_server *server = NFS_SERVER(inode);
6434 struct rpc_clnt *clnt = server->client;
6435 struct nfs4_fsid_present_arg args = {
6436 .fh = NFS_FH(inode),
6438 struct nfs4_fsid_present_res res = {
6440 struct rpc_message msg = {
6441 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6448 res.fh = nfs_alloc_fhandle();
6452 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6453 nfs4_set_sequence_privileged(&args.seq_args);
6454 status = nfs4_call_sync_sequence(clnt, server, &msg,
6455 &args.seq_args, &res.seq_res);
6456 nfs_free_fhandle(res.fh);
6457 if (status == NFS4_OK &&
6458 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6459 status = -NFS4ERR_LEASE_MOVED;
6463 #endif /* CONFIG_NFS_V4_1 */
6466 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6467 * @inode: inode on FSID to check
6468 * @cred: credential to use for this operation
6470 * Server indicates whether the FSID is present, moved, or not
6471 * recognized. This operation is necessary to clear a LEASE_MOVED
6472 * condition for this client ID.
6474 * Returns NFS4_OK if the FSID is present on this server,
6475 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6476 * NFS4ERR code if some error occurred on the server, or a
6477 * negative errno if a local failure occurred.
6479 int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6481 struct nfs_server *server = NFS_SERVER(inode);
6482 struct nfs_client *clp = server->nfs_client;
6483 const struct nfs4_mig_recovery_ops *ops =
6484 clp->cl_mvops->mig_recovery_ops;
6485 struct nfs4_exception exception = { };
6488 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6489 (unsigned long long)server->fsid.major,
6490 (unsigned long long)server->fsid.minor,
6492 nfs_display_fhandle(NFS_FH(inode), __func__);
6495 status = ops->fsid_present(inode, cred);
6496 if (status != -NFS4ERR_DELAY)
6498 nfs4_handle_exception(server, status, &exception);
6499 } while (exception.retry);
6504 * If 'use_integrity' is true and the state managment nfs_client
6505 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6506 * and the machine credential as per RFC3530bis and RFC5661 Security
6507 * Considerations sections. Otherwise, just use the user cred with the
6508 * filesystem's rpc_client.
6510 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
6513 struct nfs4_secinfo_arg args = {
6514 .dir_fh = NFS_FH(dir),
6517 struct nfs4_secinfo_res res = {
6520 struct rpc_message msg = {
6521 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6525 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
6526 struct rpc_cred *cred = NULL;
6528 if (use_integrity) {
6529 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
6530 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6531 msg.rpc_cred = cred;
6534 dprintk("NFS call secinfo %s\n", name->name);
6536 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6537 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6539 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6541 dprintk("NFS reply secinfo: %d\n", status);
6549 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6550 struct nfs4_secinfo_flavors *flavors)
6552 struct nfs4_exception exception = { };
6555 err = -NFS4ERR_WRONGSEC;
6557 /* try to use integrity protection with machine cred */
6558 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6559 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6562 * if unable to use integrity protection, or SECINFO with
6563 * integrity protection returns NFS4ERR_WRONGSEC (which is
6564 * disallowed by spec, but exists in deployed servers) use
6565 * the current filesystem's rpc_client and the user cred.
6567 if (err == -NFS4ERR_WRONGSEC)
6568 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6570 trace_nfs4_secinfo(dir, name, err);
6571 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6573 } while (exception.retry);
6577 #ifdef CONFIG_NFS_V4_1
6579 * Check the exchange flags returned by the server for invalid flags, having
6580 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6583 static int nfs4_check_cl_exchange_flags(u32 flags)
6585 if (flags & ~EXCHGID4_FLAG_MASK_R)
6587 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6588 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6590 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6594 return -NFS4ERR_INVAL;
6598 nfs41_same_server_scope(struct nfs41_server_scope *a,
6599 struct nfs41_server_scope *b)
6601 if (a->server_scope_sz == b->server_scope_sz &&
6602 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6609 * nfs4_proc_bind_conn_to_session()
6611 * The 4.1 client currently uses the same TCP connection for the
6612 * fore and backchannel.
6614 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
6617 struct nfs41_bind_conn_to_session_res res;
6618 struct rpc_message msg = {
6620 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6626 dprintk("--> %s\n", __func__);
6628 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
6629 if (unlikely(res.session == NULL)) {
6634 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6635 trace_nfs4_bind_conn_to_session(clp, status);
6637 if (memcmp(res.session->sess_id.data,
6638 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6639 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6643 if (res.dir != NFS4_CDFS4_BOTH) {
6644 dprintk("NFS: %s: Unexpected direction from server\n",
6649 if (res.use_conn_in_rdma_mode) {
6650 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6659 dprintk("<-- %s status= %d\n", __func__, status);
6664 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6665 * and operations we'd like to see to enable certain features in the allow map
6667 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6668 .how = SP4_MACH_CRED,
6669 .enforce.u.words = {
6670 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6671 1 << (OP_EXCHANGE_ID - 32) |
6672 1 << (OP_CREATE_SESSION - 32) |
6673 1 << (OP_DESTROY_SESSION - 32) |
6674 1 << (OP_DESTROY_CLIENTID - 32)
6677 [0] = 1 << (OP_CLOSE) |
6680 [1] = 1 << (OP_SECINFO - 32) |
6681 1 << (OP_SECINFO_NO_NAME - 32) |
6682 1 << (OP_TEST_STATEID - 32) |
6683 1 << (OP_FREE_STATEID - 32) |
6684 1 << (OP_WRITE - 32)
6689 * Select the state protection mode for client `clp' given the server results
6690 * from exchange_id in `sp'.
6692 * Returns 0 on success, negative errno otherwise.
6694 static int nfs4_sp4_select_mode(struct nfs_client *clp,
6695 struct nfs41_state_protection *sp)
6697 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6698 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6699 1 << (OP_EXCHANGE_ID - 32) |
6700 1 << (OP_CREATE_SESSION - 32) |
6701 1 << (OP_DESTROY_SESSION - 32) |
6702 1 << (OP_DESTROY_CLIENTID - 32)
6706 if (sp->how == SP4_MACH_CRED) {
6707 /* Print state protect result */
6708 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6709 for (i = 0; i <= LAST_NFS4_OP; i++) {
6710 if (test_bit(i, sp->enforce.u.longs))
6711 dfprintk(MOUNT, " enforce op %d\n", i);
6712 if (test_bit(i, sp->allow.u.longs))
6713 dfprintk(MOUNT, " allow op %d\n", i);
6716 /* make sure nothing is on enforce list that isn't supported */
6717 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6718 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6719 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6725 * Minimal mode - state operations are allowed to use machine
6726 * credential. Note this already happens by default, so the
6727 * client doesn't have to do anything more than the negotiation.
6729 * NOTE: we don't care if EXCHANGE_ID is in the list -
6730 * we're already using the machine cred for exchange_id
6731 * and will never use a different cred.
6733 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6734 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6735 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6736 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6737 dfprintk(MOUNT, "sp4_mach_cred:\n");
6738 dfprintk(MOUNT, " minimal mode enabled\n");
6739 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6741 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6745 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6746 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6747 dfprintk(MOUNT, " cleanup mode enabled\n");
6748 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6751 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6752 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6753 dfprintk(MOUNT, " secinfo mode enabled\n");
6754 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6757 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6758 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6759 dfprintk(MOUNT, " stateid mode enabled\n");
6760 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6763 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6764 dfprintk(MOUNT, " write mode enabled\n");
6765 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6768 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6769 dfprintk(MOUNT, " commit mode enabled\n");
6770 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6778 * _nfs4_proc_exchange_id()
6780 * Wrapper for EXCHANGE_ID operation.
6782 static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6785 nfs4_verifier verifier;
6786 struct nfs41_exchange_id_args args = {
6787 .verifier = &verifier,
6789 #ifdef CONFIG_NFS_V4_1_MIGRATION
6790 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6791 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6792 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6794 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6795 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6798 struct nfs41_exchange_id_res res = {
6802 struct rpc_message msg = {
6803 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6809 nfs4_init_boot_verifier(clp, &verifier);
6810 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6812 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6813 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6814 args.id_len, args.id);
6816 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
6818 if (unlikely(res.server_owner == NULL)) {
6823 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
6825 if (unlikely(res.server_scope == NULL)) {
6827 goto out_server_owner;
6830 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
6831 if (unlikely(res.impl_id == NULL)) {
6833 goto out_server_scope;
6838 args.state_protect.how = SP4_NONE;
6842 args.state_protect = nfs4_sp4_mach_cred_request;
6849 goto out_server_scope;
6852 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6853 trace_nfs4_exchange_id(clp, status);
6855 status = nfs4_check_cl_exchange_flags(res.flags);
6858 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6861 clp->cl_clientid = res.clientid;
6862 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6863 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6864 clp->cl_seqid = res.seqid;
6866 kfree(clp->cl_serverowner);
6867 clp->cl_serverowner = res.server_owner;
6868 res.server_owner = NULL;
6870 /* use the most recent implementation id */
6871 kfree(clp->cl_implid);
6872 clp->cl_implid = res.impl_id;
6874 if (clp->cl_serverscope != NULL &&
6875 !nfs41_same_server_scope(clp->cl_serverscope,
6876 res.server_scope)) {
6877 dprintk("%s: server_scope mismatch detected\n",
6879 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
6880 kfree(clp->cl_serverscope);
6881 clp->cl_serverscope = NULL;
6884 if (clp->cl_serverscope == NULL) {
6885 clp->cl_serverscope = res.server_scope;
6892 kfree(res.server_owner);
6894 kfree(res.server_scope);
6896 if (clp->cl_implid != NULL)
6897 dprintk("NFS reply exchange_id: Server Implementation ID: "
6898 "domain: %s, name: %s, date: %llu,%u\n",
6899 clp->cl_implid->domain, clp->cl_implid->name,
6900 clp->cl_implid->date.seconds,
6901 clp->cl_implid->date.nseconds);
6902 dprintk("NFS reply exchange_id: %d\n", status);
6907 * nfs4_proc_exchange_id()
6909 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6911 * Since the clientid has expired, all compounds using sessions
6912 * associated with the stale clientid will be returning
6913 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6914 * be in some phase of session reset.
6916 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6918 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6920 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6923 /* try SP4_MACH_CRED if krb5i/p */
6924 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6925 authflavor == RPC_AUTH_GSS_KRB5P) {
6926 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6932 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6935 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6936 struct rpc_cred *cred)
6938 struct rpc_message msg = {
6939 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6945 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6946 trace_nfs4_destroy_clientid(clp, status);
6948 dprintk("NFS: Got error %d from the server %s on "
6949 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6953 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6954 struct rpc_cred *cred)
6959 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6960 ret = _nfs4_proc_destroy_clientid(clp, cred);
6962 case -NFS4ERR_DELAY:
6963 case -NFS4ERR_CLIENTID_BUSY:
6973 int nfs4_destroy_clientid(struct nfs_client *clp)
6975 struct rpc_cred *cred;
6978 if (clp->cl_mvops->minor_version < 1)
6980 if (clp->cl_exchange_flags == 0)
6982 if (clp->cl_preserve_clid)
6984 cred = nfs4_get_clid_cred(clp);
6985 ret = nfs4_proc_destroy_clientid(clp, cred);
6990 case -NFS4ERR_STALE_CLIENTID:
6991 clp->cl_exchange_flags = 0;
6997 struct nfs4_get_lease_time_data {
6998 struct nfs4_get_lease_time_args *args;
6999 struct nfs4_get_lease_time_res *res;
7000 struct nfs_client *clp;
7003 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7006 struct nfs4_get_lease_time_data *data =
7007 (struct nfs4_get_lease_time_data *)calldata;
7009 dprintk("--> %s\n", __func__);
7010 /* just setup sequence, do not trigger session recovery
7011 since we're invoked within one */
7012 nfs41_setup_sequence(data->clp->cl_session,
7013 &data->args->la_seq_args,
7014 &data->res->lr_seq_res,
7016 dprintk("<-- %s\n", __func__);
7020 * Called from nfs4_state_manager thread for session setup, so don't recover
7021 * from sequence operation or clientid errors.
7023 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7025 struct nfs4_get_lease_time_data *data =
7026 (struct nfs4_get_lease_time_data *)calldata;
7028 dprintk("--> %s\n", __func__);
7029 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7031 switch (task->tk_status) {
7032 case -NFS4ERR_DELAY:
7033 case -NFS4ERR_GRACE:
7034 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7035 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7036 task->tk_status = 0;
7038 case -NFS4ERR_RETRY_UNCACHED_REP:
7039 rpc_restart_call_prepare(task);
7042 dprintk("<-- %s\n", __func__);
7045 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
7046 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7047 .rpc_call_done = nfs4_get_lease_time_done,
7050 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7052 struct rpc_task *task;
7053 struct nfs4_get_lease_time_args args;
7054 struct nfs4_get_lease_time_res res = {
7055 .lr_fsinfo = fsinfo,
7057 struct nfs4_get_lease_time_data data = {
7062 struct rpc_message msg = {
7063 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7067 struct rpc_task_setup task_setup = {
7068 .rpc_client = clp->cl_rpcclient,
7069 .rpc_message = &msg,
7070 .callback_ops = &nfs4_get_lease_time_ops,
7071 .callback_data = &data,
7072 .flags = RPC_TASK_TIMEOUT,
7076 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
7077 nfs4_set_sequence_privileged(&args.la_seq_args);
7078 dprintk("--> %s\n", __func__);
7079 task = rpc_run_task(&task_setup);
7082 status = PTR_ERR(task);
7084 status = task->tk_status;
7087 dprintk("<-- %s return %d\n", __func__, status);
7093 * Initialize the values to be used by the client in CREATE_SESSION
7094 * If nfs4_init_session set the fore channel request and response sizes,
7097 * Set the back channel max_resp_sz_cached to zero to force the client to
7098 * always set csa_cachethis to FALSE because the current implementation
7099 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7101 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7103 unsigned int max_rqst_sz, max_resp_sz;
7105 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7106 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
7108 /* Fore channel attributes */
7109 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7110 args->fc_attrs.max_resp_sz = max_resp_sz;
7111 args->fc_attrs.max_ops = NFS4_MAX_OPS;
7112 args->fc_attrs.max_reqs = max_session_slots;
7114 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
7115 "max_ops=%u max_reqs=%u\n",
7117 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
7118 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
7120 /* Back channel attributes */
7121 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7122 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7123 args->bc_attrs.max_resp_sz_cached = 0;
7124 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7125 args->bc_attrs.max_reqs = 1;
7127 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7128 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7130 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7131 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7132 args->bc_attrs.max_reqs);
7135 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
7137 struct nfs4_channel_attrs *sent = &args->fc_attrs;
7138 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
7140 if (rcvd->max_resp_sz > sent->max_resp_sz)
7143 * Our requested max_ops is the minimum we need; we're not
7144 * prepared to break up compounds into smaller pieces than that.
7145 * So, no point even trying to continue if the server won't
7148 if (rcvd->max_ops < sent->max_ops)
7150 if (rcvd->max_reqs == 0)
7152 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7153 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
7157 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
7159 struct nfs4_channel_attrs *sent = &args->bc_attrs;
7160 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
7162 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7164 if (rcvd->max_resp_sz < sent->max_resp_sz)
7166 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7168 /* These would render the backchannel useless: */
7169 if (rcvd->max_ops != sent->max_ops)
7171 if (rcvd->max_reqs != sent->max_reqs)
7176 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7177 struct nfs4_session *session)
7181 ret = nfs4_verify_fore_channel_attrs(args, session);
7184 return nfs4_verify_back_channel_attrs(args, session);
7187 static int _nfs4_proc_create_session(struct nfs_client *clp,
7188 struct rpc_cred *cred)
7190 struct nfs4_session *session = clp->cl_session;
7191 struct nfs41_create_session_args args = {
7193 .cb_program = NFS4_CALLBACK,
7195 struct nfs41_create_session_res res = {
7198 struct rpc_message msg = {
7199 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7206 nfs4_init_channel_attrs(&args);
7207 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
7209 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7210 trace_nfs4_create_session(clp, status);
7213 /* Verify the session's negotiated channel_attrs values */
7214 status = nfs4_verify_channel_attrs(&args, session);
7215 /* Increment the clientid slot sequence id */
7223 * Issues a CREATE_SESSION operation to the server.
7224 * It is the responsibility of the caller to verify the session is
7225 * expired before calling this routine.
7227 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
7231 struct nfs4_session *session = clp->cl_session;
7233 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7235 status = _nfs4_proc_create_session(clp, cred);
7239 /* Init or reset the session slot tables */
7240 status = nfs4_setup_session_slot_tables(session);
7241 dprintk("slot table setup returned %d\n", status);
7245 ptr = (unsigned *)&session->sess_id.data[0];
7246 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7247 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
7249 dprintk("<-- %s\n", __func__);
7254 * Issue the over-the-wire RPC DESTROY_SESSION.
7255 * The caller must serialize access to this routine.
7257 int nfs4_proc_destroy_session(struct nfs4_session *session,
7258 struct rpc_cred *cred)
7260 struct rpc_message msg = {
7261 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7262 .rpc_argp = session,
7267 dprintk("--> nfs4_proc_destroy_session\n");
7269 /* session is still being setup */
7270 if (session->clp->cl_cons_state != NFS_CS_READY)
7273 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7274 trace_nfs4_destroy_session(session->clp, status);
7277 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
7278 "Session has been destroyed regardless...\n", status);
7280 dprintk("<-- nfs4_proc_destroy_session\n");
7285 * Renew the cl_session lease.
7287 struct nfs4_sequence_data {
7288 struct nfs_client *clp;
7289 struct nfs4_sequence_args args;
7290 struct nfs4_sequence_res res;
7293 static void nfs41_sequence_release(void *data)
7295 struct nfs4_sequence_data *calldata = data;
7296 struct nfs_client *clp = calldata->clp;
7298 if (atomic_read(&clp->cl_count) > 1)
7299 nfs4_schedule_state_renewal(clp);
7300 nfs_put_client(clp);
7304 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7306 switch(task->tk_status) {
7307 case -NFS4ERR_DELAY:
7308 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7311 nfs4_schedule_lease_recovery(clp);
7316 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
7318 struct nfs4_sequence_data *calldata = data;
7319 struct nfs_client *clp = calldata->clp;
7321 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7324 trace_nfs4_sequence(clp, task->tk_status);
7325 if (task->tk_status < 0) {
7326 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7327 if (atomic_read(&clp->cl_count) == 1)
7330 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7331 rpc_restart_call_prepare(task);
7335 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7337 dprintk("<-- %s\n", __func__);
7340 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7342 struct nfs4_sequence_data *calldata = data;
7343 struct nfs_client *clp = calldata->clp;
7344 struct nfs4_sequence_args *args;
7345 struct nfs4_sequence_res *res;
7347 args = task->tk_msg.rpc_argp;
7348 res = task->tk_msg.rpc_resp;
7350 nfs41_setup_sequence(clp->cl_session, args, res, task);
7353 static const struct rpc_call_ops nfs41_sequence_ops = {
7354 .rpc_call_done = nfs41_sequence_call_done,
7355 .rpc_call_prepare = nfs41_sequence_prepare,
7356 .rpc_release = nfs41_sequence_release,
7359 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7360 struct rpc_cred *cred,
7363 struct nfs4_sequence_data *calldata;
7364 struct rpc_message msg = {
7365 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7368 struct rpc_task_setup task_setup_data = {
7369 .rpc_client = clp->cl_rpcclient,
7370 .rpc_message = &msg,
7371 .callback_ops = &nfs41_sequence_ops,
7372 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
7375 if (!atomic_inc_not_zero(&clp->cl_count))
7376 return ERR_PTR(-EIO);
7377 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7378 if (calldata == NULL) {
7379 nfs_put_client(clp);
7380 return ERR_PTR(-ENOMEM);
7382 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
7384 nfs4_set_sequence_privileged(&calldata->args);
7385 msg.rpc_argp = &calldata->args;
7386 msg.rpc_resp = &calldata->res;
7387 calldata->clp = clp;
7388 task_setup_data.callback_data = calldata;
7390 return rpc_run_task(&task_setup_data);
7393 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
7395 struct rpc_task *task;
7398 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
7400 task = _nfs41_proc_sequence(clp, cred, false);
7402 ret = PTR_ERR(task);
7404 rpc_put_task_async(task);
7405 dprintk("<-- %s status=%d\n", __func__, ret);
7409 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7411 struct rpc_task *task;
7414 task = _nfs41_proc_sequence(clp, cred, true);
7416 ret = PTR_ERR(task);
7419 ret = rpc_wait_for_completion_task(task);
7421 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7423 if (task->tk_status == 0)
7424 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
7425 ret = task->tk_status;
7429 dprintk("<-- %s status=%d\n", __func__, ret);
7433 struct nfs4_reclaim_complete_data {
7434 struct nfs_client *clp;
7435 struct nfs41_reclaim_complete_args arg;
7436 struct nfs41_reclaim_complete_res res;
7439 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7441 struct nfs4_reclaim_complete_data *calldata = data;
7443 nfs41_setup_sequence(calldata->clp->cl_session,
7444 &calldata->arg.seq_args,
7445 &calldata->res.seq_res,
7449 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7451 switch(task->tk_status) {
7453 case -NFS4ERR_COMPLETE_ALREADY:
7454 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7456 case -NFS4ERR_DELAY:
7457 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7459 case -NFS4ERR_RETRY_UNCACHED_REP:
7462 nfs4_schedule_lease_recovery(clp);
7467 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7469 struct nfs4_reclaim_complete_data *calldata = data;
7470 struct nfs_client *clp = calldata->clp;
7471 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7473 dprintk("--> %s\n", __func__);
7474 if (!nfs41_sequence_done(task, res))
7477 trace_nfs4_reclaim_complete(clp, task->tk_status);
7478 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7479 rpc_restart_call_prepare(task);
7482 dprintk("<-- %s\n", __func__);
7485 static void nfs4_free_reclaim_complete_data(void *data)
7487 struct nfs4_reclaim_complete_data *calldata = data;
7492 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7493 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7494 .rpc_call_done = nfs4_reclaim_complete_done,
7495 .rpc_release = nfs4_free_reclaim_complete_data,
7499 * Issue a global reclaim complete.
7501 static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7502 struct rpc_cred *cred)
7504 struct nfs4_reclaim_complete_data *calldata;
7505 struct rpc_task *task;
7506 struct rpc_message msg = {
7507 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
7510 struct rpc_task_setup task_setup_data = {
7511 .rpc_client = clp->cl_rpcclient,
7512 .rpc_message = &msg,
7513 .callback_ops = &nfs4_reclaim_complete_call_ops,
7514 .flags = RPC_TASK_ASYNC,
7516 int status = -ENOMEM;
7518 dprintk("--> %s\n", __func__);
7519 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7520 if (calldata == NULL)
7522 calldata->clp = clp;
7523 calldata->arg.one_fs = 0;
7525 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
7526 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
7527 msg.rpc_argp = &calldata->arg;
7528 msg.rpc_resp = &calldata->res;
7529 task_setup_data.callback_data = calldata;
7530 task = rpc_run_task(&task_setup_data);
7532 status = PTR_ERR(task);
7535 status = nfs4_wait_for_completion_rpc_task(task);
7537 status = task->tk_status;
7541 dprintk("<-- %s status=%d\n", __func__, status);
7546 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7548 struct nfs4_layoutget *lgp = calldata;
7549 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
7550 struct nfs4_session *session = nfs4_get_session(server);
7552 dprintk("--> %s\n", __func__);
7553 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7554 * right now covering the LAYOUTGET we are about to send.
7555 * However, that is not so catastrophic, and there seems
7556 * to be no way to prevent it completely.
7558 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
7559 &lgp->res.seq_res, task))
7561 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7562 NFS_I(lgp->args.inode)->layout,
7563 lgp->args.ctx->state)) {
7564 rpc_exit(task, NFS4_OK);
7568 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7570 struct nfs4_layoutget *lgp = calldata;
7571 struct inode *inode = lgp->args.inode;
7572 struct nfs_server *server = NFS_SERVER(inode);
7573 struct pnfs_layout_hdr *lo;
7574 struct nfs4_state *state = NULL;
7575 unsigned long timeo, now, giveup;
7577 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
7579 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
7582 switch (task->tk_status) {
7586 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7587 * (or clients) writing to the same RAID stripe
7589 case -NFS4ERR_LAYOUTTRYLATER:
7591 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7592 * existing layout before getting a new one).
7594 case -NFS4ERR_RECALLCONFLICT:
7595 timeo = rpc_get_timeout(task->tk_client);
7596 giveup = lgp->args.timestamp + timeo;
7598 if (time_after(giveup, now)) {
7599 unsigned long delay;
7602 * - Not less then NFS4_POLL_RETRY_MIN.
7603 * - One last time a jiffie before we give up
7604 * - exponential backoff (time_now minus start_attempt)
7606 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7607 min((giveup - now - 1),
7608 now - lgp->args.timestamp));
7610 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7612 rpc_delay(task, delay);
7613 task->tk_status = 0;
7614 rpc_restart_call_prepare(task);
7615 goto out; /* Do not call nfs4_async_handle_error() */
7618 case -NFS4ERR_EXPIRED:
7619 case -NFS4ERR_BAD_STATEID:
7620 spin_lock(&inode->i_lock);
7621 lo = NFS_I(inode)->layout;
7622 if (!lo || list_empty(&lo->plh_segs)) {
7623 spin_unlock(&inode->i_lock);
7624 /* If the open stateid was bad, then recover it. */
7625 state = lgp->args.ctx->state;
7630 * Mark the bad layout state as invalid, then retry
7631 * with the current stateid.
7633 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7634 spin_unlock(&inode->i_lock);
7635 pnfs_free_lseg_list(&head);
7637 task->tk_status = 0;
7638 rpc_restart_call_prepare(task);
7641 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN)
7642 rpc_restart_call_prepare(task);
7644 dprintk("<-- %s\n", __func__);
7647 static size_t max_response_pages(struct nfs_server *server)
7649 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7650 return nfs_page_array_len(0, max_resp_sz);
7653 static void nfs4_free_pages(struct page **pages, size_t size)
7660 for (i = 0; i < size; i++) {
7663 __free_page(pages[i]);
7668 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7670 struct page **pages;
7673 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7675 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7679 for (i = 0; i < size; i++) {
7680 pages[i] = alloc_page(gfp_flags);
7682 dprintk("%s: failed to allocate page\n", __func__);
7683 nfs4_free_pages(pages, size);
7691 static void nfs4_layoutget_release(void *calldata)
7693 struct nfs4_layoutget *lgp = calldata;
7694 struct inode *inode = lgp->args.inode;
7695 struct nfs_server *server = NFS_SERVER(inode);
7696 size_t max_pages = max_response_pages(server);
7698 dprintk("--> %s\n", __func__);
7699 nfs4_free_pages(lgp->args.layout.pages, max_pages);
7700 pnfs_put_layout_hdr(NFS_I(inode)->layout);
7701 put_nfs_open_context(lgp->args.ctx);
7703 dprintk("<-- %s\n", __func__);
7706 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7707 .rpc_call_prepare = nfs4_layoutget_prepare,
7708 .rpc_call_done = nfs4_layoutget_done,
7709 .rpc_release = nfs4_layoutget_release,
7712 struct pnfs_layout_segment *
7713 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
7715 struct inode *inode = lgp->args.inode;
7716 struct nfs_server *server = NFS_SERVER(inode);
7717 size_t max_pages = max_response_pages(server);
7718 struct rpc_task *task;
7719 struct rpc_message msg = {
7720 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7721 .rpc_argp = &lgp->args,
7722 .rpc_resp = &lgp->res,
7723 .rpc_cred = lgp->cred,
7725 struct rpc_task_setup task_setup_data = {
7726 .rpc_client = server->client,
7727 .rpc_message = &msg,
7728 .callback_ops = &nfs4_layoutget_call_ops,
7729 .callback_data = lgp,
7730 .flags = RPC_TASK_ASYNC,
7732 struct pnfs_layout_segment *lseg = NULL;
7735 dprintk("--> %s\n", __func__);
7737 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7738 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7740 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7741 if (!lgp->args.layout.pages) {
7742 nfs4_layoutget_release(lgp);
7743 return ERR_PTR(-ENOMEM);
7745 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
7746 lgp->args.timestamp = jiffies;
7748 lgp->res.layoutp = &lgp->args.layout;
7749 lgp->res.seq_res.sr_slot = NULL;
7750 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
7752 task = rpc_run_task(&task_setup_data);
7754 return ERR_CAST(task);
7755 status = nfs4_wait_for_completion_rpc_task(task);
7757 status = task->tk_status;
7758 trace_nfs4_layoutget(lgp->args.ctx,
7762 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7763 if (status == 0 && lgp->res.layoutp->len)
7764 lseg = pnfs_layout_process(lgp);
7766 dprintk("<-- %s status=%d\n", __func__, status);
7768 return ERR_PTR(status);
7773 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7775 struct nfs4_layoutreturn *lrp = calldata;
7777 dprintk("--> %s\n", __func__);
7778 nfs41_setup_sequence(lrp->clp->cl_session,
7779 &lrp->args.seq_args,
7784 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7786 struct nfs4_layoutreturn *lrp = calldata;
7787 struct nfs_server *server;
7789 dprintk("--> %s\n", __func__);
7791 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
7794 server = NFS_SERVER(lrp->args.inode);
7795 switch (task->tk_status) {
7797 task->tk_status = 0;
7800 case -NFS4ERR_DELAY:
7801 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
7803 rpc_restart_call_prepare(task);
7806 dprintk("<-- %s\n", __func__);
7809 static void nfs4_layoutreturn_release(void *calldata)
7811 struct nfs4_layoutreturn *lrp = calldata;
7812 struct pnfs_layout_hdr *lo = lrp->args.layout;
7814 dprintk("--> %s\n", __func__);
7815 spin_lock(&lo->plh_inode->i_lock);
7816 if (lrp->res.lrs_present)
7817 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7818 lo->plh_block_lgets--;
7819 spin_unlock(&lo->plh_inode->i_lock);
7820 pnfs_put_layout_hdr(lrp->args.layout);
7822 dprintk("<-- %s\n", __func__);
7825 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7826 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7827 .rpc_call_done = nfs4_layoutreturn_done,
7828 .rpc_release = nfs4_layoutreturn_release,
7831 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
7833 struct rpc_task *task;
7834 struct rpc_message msg = {
7835 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7836 .rpc_argp = &lrp->args,
7837 .rpc_resp = &lrp->res,
7838 .rpc_cred = lrp->cred,
7840 struct rpc_task_setup task_setup_data = {
7841 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
7842 .rpc_message = &msg,
7843 .callback_ops = &nfs4_layoutreturn_call_ops,
7844 .callback_data = lrp,
7848 dprintk("--> %s\n", __func__);
7849 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
7850 task = rpc_run_task(&task_setup_data);
7852 return PTR_ERR(task);
7853 status = task->tk_status;
7854 trace_nfs4_layoutreturn(lrp->args.inode, status);
7855 dprintk("<-- %s status=%d\n", __func__, status);
7861 _nfs4_proc_getdeviceinfo(struct nfs_server *server,
7862 struct pnfs_device *pdev,
7863 struct rpc_cred *cred)
7865 struct nfs4_getdeviceinfo_args args = {
7868 struct nfs4_getdeviceinfo_res res = {
7871 struct rpc_message msg = {
7872 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7879 dprintk("--> %s\n", __func__);
7880 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
7881 dprintk("<-- %s status=%d\n", __func__, status);
7886 int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7887 struct pnfs_device *pdev,
7888 struct rpc_cred *cred)
7890 struct nfs4_exception exception = { };
7894 err = nfs4_handle_exception(server,
7895 _nfs4_proc_getdeviceinfo(server, pdev, cred),
7897 } while (exception.retry);
7900 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7902 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7904 struct nfs4_layoutcommit_data *data = calldata;
7905 struct nfs_server *server = NFS_SERVER(data->args.inode);
7906 struct nfs4_session *session = nfs4_get_session(server);
7908 nfs41_setup_sequence(session,
7909 &data->args.seq_args,
7915 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7917 struct nfs4_layoutcommit_data *data = calldata;
7918 struct nfs_server *server = NFS_SERVER(data->args.inode);
7920 if (!nfs41_sequence_done(task, &data->res.seq_res))
7923 switch (task->tk_status) { /* Just ignore these failures */
7924 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7925 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7926 case -NFS4ERR_BADLAYOUT: /* no layout */
7927 case -NFS4ERR_GRACE: /* loca_recalim always false */
7928 task->tk_status = 0;
7932 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
7933 rpc_restart_call_prepare(task);
7939 static void nfs4_layoutcommit_release(void *calldata)
7941 struct nfs4_layoutcommit_data *data = calldata;
7943 pnfs_cleanup_layoutcommit(data);
7944 nfs_post_op_update_inode_force_wcc(data->args.inode,
7946 put_rpccred(data->cred);
7950 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7951 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7952 .rpc_call_done = nfs4_layoutcommit_done,
7953 .rpc_release = nfs4_layoutcommit_release,
7957 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
7959 struct rpc_message msg = {
7960 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7961 .rpc_argp = &data->args,
7962 .rpc_resp = &data->res,
7963 .rpc_cred = data->cred,
7965 struct rpc_task_setup task_setup_data = {
7966 .task = &data->task,
7967 .rpc_client = NFS_CLIENT(data->args.inode),
7968 .rpc_message = &msg,
7969 .callback_ops = &nfs4_layoutcommit_ops,
7970 .callback_data = data,
7971 .flags = RPC_TASK_ASYNC,
7973 struct rpc_task *task;
7976 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7977 "lbw: %llu inode %lu\n",
7978 data->task.tk_pid, sync,
7979 data->args.lastbytewritten,
7980 data->args.inode->i_ino);
7982 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
7983 task = rpc_run_task(&task_setup_data);
7985 return PTR_ERR(task);
7988 status = nfs4_wait_for_completion_rpc_task(task);
7991 status = task->tk_status;
7992 trace_nfs4_layoutcommit(data->args.inode, status);
7994 dprintk("%s: status %d\n", __func__, status);
8000 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8001 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8004 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8005 struct nfs_fsinfo *info,
8006 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
8008 struct nfs41_secinfo_no_name_args args = {
8009 .style = SECINFO_STYLE_CURRENT_FH,
8011 struct nfs4_secinfo_res res = {
8014 struct rpc_message msg = {
8015 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8019 struct rpc_clnt *clnt = server->client;
8020 struct rpc_cred *cred = NULL;
8023 if (use_integrity) {
8024 clnt = server->nfs_client->cl_rpcclient;
8025 cred = nfs4_get_clid_cred(server->nfs_client);
8026 msg.rpc_cred = cred;
8029 dprintk("--> %s\n", __func__);
8030 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8032 dprintk("<-- %s status=%d\n", __func__, status);
8041 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8042 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8044 struct nfs4_exception exception = { };
8047 /* first try using integrity protection */
8048 err = -NFS4ERR_WRONGSEC;
8050 /* try to use integrity protection with machine cred */
8051 if (_nfs4_is_integrity_protected(server->nfs_client))
8052 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8056 * if unable to use integrity protection, or SECINFO with
8057 * integrity protection returns NFS4ERR_WRONGSEC (which is
8058 * disallowed by spec, but exists in deployed servers) use
8059 * the current filesystem's rpc_client and the user cred.
8061 if (err == -NFS4ERR_WRONGSEC)
8062 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8067 case -NFS4ERR_WRONGSEC:
8071 err = nfs4_handle_exception(server, err, &exception);
8073 } while (exception.retry);
8079 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8080 struct nfs_fsinfo *info)
8084 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
8085 struct nfs4_secinfo_flavors *flavors;
8086 struct nfs4_secinfo4 *secinfo;
8089 page = alloc_page(GFP_KERNEL);
8095 flavors = page_address(page);
8096 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8099 * Fall back on "guess and check" method if
8100 * the server doesn't support SECINFO_NO_NAME
8102 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
8103 err = nfs4_find_root_sec(server, fhandle, info);
8109 for (i = 0; i < flavors->num_flavors; i++) {
8110 secinfo = &flavors->flavors[i];
8112 switch (secinfo->flavor) {
8116 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8117 &secinfo->flavor_info);
8120 flavor = RPC_AUTH_MAXFLAVOR;
8124 if (!nfs_auth_info_match(&server->auth_info, flavor))
8125 flavor = RPC_AUTH_MAXFLAVOR;
8127 if (flavor != RPC_AUTH_MAXFLAVOR) {
8128 err = nfs4_lookup_root_sec(server, fhandle,
8135 if (flavor == RPC_AUTH_MAXFLAVOR)
8146 static int _nfs41_test_stateid(struct nfs_server *server,
8147 nfs4_stateid *stateid,
8148 struct rpc_cred *cred)
8151 struct nfs41_test_stateid_args args = {
8154 struct nfs41_test_stateid_res res;
8155 struct rpc_message msg = {
8156 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8161 struct rpc_clnt *rpc_client = server->client;
8163 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8166 dprintk("NFS call test_stateid %p\n", stateid);
8167 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8168 nfs4_set_sequence_privileged(&args.seq_args);
8169 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8170 &args.seq_args, &res.seq_res);
8171 if (status != NFS_OK) {
8172 dprintk("NFS reply test_stateid: failed, %d\n", status);
8175 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
8180 * nfs41_test_stateid - perform a TEST_STATEID operation
8182 * @server: server / transport on which to perform the operation
8183 * @stateid: state ID to test
8186 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8187 * Otherwise a negative NFS4ERR value is returned if the operation
8188 * failed or the state ID is not currently valid.
8190 static int nfs41_test_stateid(struct nfs_server *server,
8191 nfs4_stateid *stateid,
8192 struct rpc_cred *cred)
8194 struct nfs4_exception exception = { };
8197 err = _nfs41_test_stateid(server, stateid, cred);
8198 if (err != -NFS4ERR_DELAY)
8200 nfs4_handle_exception(server, err, &exception);
8201 } while (exception.retry);
8205 struct nfs_free_stateid_data {
8206 struct nfs_server *server;
8207 struct nfs41_free_stateid_args args;
8208 struct nfs41_free_stateid_res res;
8211 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8213 struct nfs_free_stateid_data *data = calldata;
8214 nfs41_setup_sequence(nfs4_get_session(data->server),
8215 &data->args.seq_args,
8220 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8222 struct nfs_free_stateid_data *data = calldata;
8224 nfs41_sequence_done(task, &data->res.seq_res);
8226 switch (task->tk_status) {
8227 case -NFS4ERR_DELAY:
8228 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
8229 rpc_restart_call_prepare(task);
8233 static void nfs41_free_stateid_release(void *calldata)
8238 static const struct rpc_call_ops nfs41_free_stateid_ops = {
8239 .rpc_call_prepare = nfs41_free_stateid_prepare,
8240 .rpc_call_done = nfs41_free_stateid_done,
8241 .rpc_release = nfs41_free_stateid_release,
8244 static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8245 nfs4_stateid *stateid,
8246 struct rpc_cred *cred,
8249 struct rpc_message msg = {
8250 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
8253 struct rpc_task_setup task_setup = {
8254 .rpc_client = server->client,
8255 .rpc_message = &msg,
8256 .callback_ops = &nfs41_free_stateid_ops,
8257 .flags = RPC_TASK_ASYNC,
8259 struct nfs_free_stateid_data *data;
8261 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8262 &task_setup.rpc_client, &msg);
8264 dprintk("NFS call free_stateid %p\n", stateid);
8265 data = kmalloc(sizeof(*data), GFP_NOFS);
8267 return ERR_PTR(-ENOMEM);
8268 data->server = server;
8269 nfs4_stateid_copy(&data->args.stateid, stateid);
8271 task_setup.callback_data = data;
8273 msg.rpc_argp = &data->args;
8274 msg.rpc_resp = &data->res;
8275 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
8277 nfs4_set_sequence_privileged(&data->args.seq_args);
8279 return rpc_run_task(&task_setup);
8283 * nfs41_free_stateid - perform a FREE_STATEID operation
8285 * @server: server / transport on which to perform the operation
8286 * @stateid: state ID to release
8289 * Returns NFS_OK if the server freed "stateid". Otherwise a
8290 * negative NFS4ERR value is returned.
8292 static int nfs41_free_stateid(struct nfs_server *server,
8293 nfs4_stateid *stateid,
8294 struct rpc_cred *cred)
8296 struct rpc_task *task;
8299 task = _nfs41_free_stateid(server, stateid, cred, true);
8301 return PTR_ERR(task);
8302 ret = rpc_wait_for_completion_task(task);
8304 ret = task->tk_status;
8310 nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
8312 struct rpc_task *task;
8313 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
8315 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
8316 nfs4_free_lock_state(server, lsp);
8322 static bool nfs41_match_stateid(const nfs4_stateid *s1,
8323 const nfs4_stateid *s2)
8325 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
8328 if (s1->seqid == s2->seqid)
8330 if (s1->seqid == 0 || s2->seqid == 0)
8336 #endif /* CONFIG_NFS_V4_1 */
8338 static bool nfs4_match_stateid(const nfs4_stateid *s1,
8339 const nfs4_stateid *s2)
8341 return nfs4_stateid_match(s1, s2);
8345 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
8346 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8347 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8348 .recover_open = nfs4_open_reclaim,
8349 .recover_lock = nfs4_lock_reclaim,
8350 .establish_clid = nfs4_init_clientid,
8351 .detect_trunking = nfs40_discover_server_trunking,
8354 #if defined(CONFIG_NFS_V4_1)
8355 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
8356 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8357 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8358 .recover_open = nfs4_open_reclaim,
8359 .recover_lock = nfs4_lock_reclaim,
8360 .establish_clid = nfs41_init_clientid,
8361 .reclaim_complete = nfs41_proc_reclaim_complete,
8362 .detect_trunking = nfs41_discover_server_trunking,
8364 #endif /* CONFIG_NFS_V4_1 */
8366 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
8367 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8368 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8369 .recover_open = nfs40_open_expired,
8370 .recover_lock = nfs4_lock_expired,
8371 .establish_clid = nfs4_init_clientid,
8374 #if defined(CONFIG_NFS_V4_1)
8375 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
8376 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8377 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8378 .recover_open = nfs41_open_expired,
8379 .recover_lock = nfs41_lock_expired,
8380 .establish_clid = nfs41_init_clientid,
8382 #endif /* CONFIG_NFS_V4_1 */
8384 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
8385 .sched_state_renewal = nfs4_proc_async_renew,
8386 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8387 .renew_lease = nfs4_proc_renew,
8390 #if defined(CONFIG_NFS_V4_1)
8391 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
8392 .sched_state_renewal = nfs41_proc_async_sequence,
8393 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8394 .renew_lease = nfs4_proc_sequence,
8398 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
8399 .get_locations = _nfs40_proc_get_locations,
8400 .fsid_present = _nfs40_proc_fsid_present,
8403 #if defined(CONFIG_NFS_V4_1)
8404 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
8405 .get_locations = _nfs41_proc_get_locations,
8406 .fsid_present = _nfs41_proc_fsid_present,
8408 #endif /* CONFIG_NFS_V4_1 */
8410 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8412 .init_caps = NFS_CAP_READDIRPLUS
8413 | NFS_CAP_ATOMIC_OPEN
8414 | NFS_CAP_CHANGE_ATTR
8415 | NFS_CAP_POSIX_LOCK,
8416 .init_client = nfs40_init_client,
8417 .shutdown_client = nfs40_shutdown_client,
8418 .match_stateid = nfs4_match_stateid,
8419 .find_root_sec = nfs4_find_root_sec,
8420 .free_lock_state = nfs4_release_lockowner,
8421 .alloc_seqid = nfs_alloc_seqid,
8422 .call_sync_ops = &nfs40_call_sync_ops,
8423 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8424 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8425 .state_renewal_ops = &nfs40_state_renewal_ops,
8426 .mig_recovery_ops = &nfs40_mig_recovery_ops,
8429 #if defined(CONFIG_NFS_V4_1)
8430 static struct nfs_seqid *
8431 nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8436 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8438 .init_caps = NFS_CAP_READDIRPLUS
8439 | NFS_CAP_ATOMIC_OPEN
8440 | NFS_CAP_CHANGE_ATTR
8441 | NFS_CAP_POSIX_LOCK
8442 | NFS_CAP_STATEID_NFSV41
8443 | NFS_CAP_ATOMIC_OPEN_V1,
8444 .init_client = nfs41_init_client,
8445 .shutdown_client = nfs41_shutdown_client,
8446 .match_stateid = nfs41_match_stateid,
8447 .find_root_sec = nfs41_find_root_sec,
8448 .free_lock_state = nfs41_free_lock_state,
8449 .alloc_seqid = nfs_alloc_no_seqid,
8450 .call_sync_ops = &nfs41_call_sync_ops,
8451 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8452 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8453 .state_renewal_ops = &nfs41_state_renewal_ops,
8454 .mig_recovery_ops = &nfs41_mig_recovery_ops,
8458 #if defined(CONFIG_NFS_V4_2)
8459 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8461 .init_caps = NFS_CAP_READDIRPLUS
8462 | NFS_CAP_ATOMIC_OPEN
8463 | NFS_CAP_CHANGE_ATTR
8464 | NFS_CAP_POSIX_LOCK
8465 | NFS_CAP_STATEID_NFSV41
8466 | NFS_CAP_ATOMIC_OPEN_V1
8468 | NFS_CAP_DEALLOCATE
8470 .init_client = nfs41_init_client,
8471 .shutdown_client = nfs41_shutdown_client,
8472 .match_stateid = nfs41_match_stateid,
8473 .find_root_sec = nfs41_find_root_sec,
8474 .free_lock_state = nfs41_free_lock_state,
8475 .call_sync_ops = &nfs41_call_sync_ops,
8476 .alloc_seqid = nfs_alloc_no_seqid,
8477 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8478 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8479 .state_renewal_ops = &nfs41_state_renewal_ops,
8483 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8484 [0] = &nfs_v4_0_minor_ops,
8485 #if defined(CONFIG_NFS_V4_1)
8486 [1] = &nfs_v4_1_minor_ops,
8488 #if defined(CONFIG_NFS_V4_2)
8489 [2] = &nfs_v4_2_minor_ops,
8493 static const struct inode_operations nfs4_dir_inode_operations = {
8494 .create = nfs_create,
8495 .lookup = nfs_lookup,
8496 .atomic_open = nfs_atomic_open,
8498 .unlink = nfs_unlink,
8499 .symlink = nfs_symlink,
8503 .rename = nfs_rename,
8504 .permission = nfs_permission,
8505 .getattr = nfs_getattr,
8506 .setattr = nfs_setattr,
8507 .getxattr = generic_getxattr,
8508 .setxattr = generic_setxattr,
8509 .listxattr = generic_listxattr,
8510 .removexattr = generic_removexattr,
8513 static const struct inode_operations nfs4_file_inode_operations = {
8514 .permission = nfs_permission,
8515 .getattr = nfs_getattr,
8516 .setattr = nfs_setattr,
8517 .getxattr = generic_getxattr,
8518 .setxattr = generic_setxattr,
8519 .listxattr = generic_listxattr,
8520 .removexattr = generic_removexattr,
8523 const struct nfs_rpc_ops nfs_v4_clientops = {
8524 .version = 4, /* protocol version */
8525 .dentry_ops = &nfs4_dentry_operations,
8526 .dir_inode_ops = &nfs4_dir_inode_operations,
8527 .file_inode_ops = &nfs4_file_inode_operations,
8528 .file_ops = &nfs4_file_operations,
8529 .getroot = nfs4_proc_get_root,
8530 .submount = nfs4_submount,
8531 .try_mount = nfs4_try_mount,
8532 .getattr = nfs4_proc_getattr,
8533 .setattr = nfs4_proc_setattr,
8534 .lookup = nfs4_proc_lookup,
8535 .access = nfs4_proc_access,
8536 .readlink = nfs4_proc_readlink,
8537 .create = nfs4_proc_create,
8538 .remove = nfs4_proc_remove,
8539 .unlink_setup = nfs4_proc_unlink_setup,
8540 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
8541 .unlink_done = nfs4_proc_unlink_done,
8542 .rename_setup = nfs4_proc_rename_setup,
8543 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
8544 .rename_done = nfs4_proc_rename_done,
8545 .link = nfs4_proc_link,
8546 .symlink = nfs4_proc_symlink,
8547 .mkdir = nfs4_proc_mkdir,
8548 .rmdir = nfs4_proc_remove,
8549 .readdir = nfs4_proc_readdir,
8550 .mknod = nfs4_proc_mknod,
8551 .statfs = nfs4_proc_statfs,
8552 .fsinfo = nfs4_proc_fsinfo,
8553 .pathconf = nfs4_proc_pathconf,
8554 .set_capabilities = nfs4_server_capabilities,
8555 .decode_dirent = nfs4_decode_dirent,
8556 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
8557 .read_setup = nfs4_proc_read_setup,
8558 .read_done = nfs4_read_done,
8559 .write_setup = nfs4_proc_write_setup,
8560 .write_done = nfs4_write_done,
8561 .commit_setup = nfs4_proc_commit_setup,
8562 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
8563 .commit_done = nfs4_commit_done,
8564 .lock = nfs4_proc_lock,
8565 .clear_acl_cache = nfs4_zap_acl_attr,
8566 .close_context = nfs4_close_context,
8567 .open_context = nfs4_atomic_open,
8568 .have_delegation = nfs4_have_delegation,
8569 .return_delegation = nfs4_inode_return_delegation,
8570 .alloc_client = nfs4_alloc_client,
8571 .init_client = nfs4_init_client,
8572 .free_client = nfs4_free_client,
8573 .create_server = nfs4_create_server,
8574 .clone_server = nfs_clone_server,
8577 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8578 .prefix = XATTR_NAME_NFSV4_ACL,
8579 .list = nfs4_xattr_list_nfs4_acl,
8580 .get = nfs4_xattr_get_nfs4_acl,
8581 .set = nfs4_xattr_set_nfs4_acl,
8584 const struct xattr_handler *nfs4_xattr_handlers[] = {
8585 &nfs4_xattr_nfs4_acl_handler,
8586 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
8587 &nfs4_xattr_nfs4_label_handler,