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 *);
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_ACCESS:
163 case -NFS4ERR_FILE_OPEN:
166 dprintk("%s could not handle NFSv4 error %d\n",
174 * This is our standard bitmap for GETATTR requests.
176 const u32 nfs4_fattr_bitmap[3] = {
178 | FATTR4_WORD0_CHANGE
181 | FATTR4_WORD0_FILEID,
183 | FATTR4_WORD1_NUMLINKS
185 | FATTR4_WORD1_OWNER_GROUP
186 | FATTR4_WORD1_RAWDEV
187 | FATTR4_WORD1_SPACE_USED
188 | FATTR4_WORD1_TIME_ACCESS
189 | FATTR4_WORD1_TIME_METADATA
190 | FATTR4_WORD1_TIME_MODIFY,
191 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
192 FATTR4_WORD2_SECURITY_LABEL
196 static const u32 nfs4_pnfs_open_bitmap[3] = {
198 | FATTR4_WORD0_CHANGE
201 | FATTR4_WORD0_FILEID,
203 | FATTR4_WORD1_NUMLINKS
205 | FATTR4_WORD1_OWNER_GROUP
206 | FATTR4_WORD1_RAWDEV
207 | FATTR4_WORD1_SPACE_USED
208 | FATTR4_WORD1_TIME_ACCESS
209 | FATTR4_WORD1_TIME_METADATA
210 | FATTR4_WORD1_TIME_MODIFY,
211 FATTR4_WORD2_MDSTHRESHOLD
214 static const u32 nfs4_open_noattr_bitmap[3] = {
216 | FATTR4_WORD0_CHANGE
217 | FATTR4_WORD0_FILEID,
220 const u32 nfs4_statfs_bitmap[3] = {
221 FATTR4_WORD0_FILES_AVAIL
222 | FATTR4_WORD0_FILES_FREE
223 | FATTR4_WORD0_FILES_TOTAL,
224 FATTR4_WORD1_SPACE_AVAIL
225 | FATTR4_WORD1_SPACE_FREE
226 | FATTR4_WORD1_SPACE_TOTAL
229 const u32 nfs4_pathconf_bitmap[3] = {
231 | FATTR4_WORD0_MAXNAME,
235 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
236 | FATTR4_WORD0_MAXREAD
237 | FATTR4_WORD0_MAXWRITE
238 | FATTR4_WORD0_LEASE_TIME,
239 FATTR4_WORD1_TIME_DELTA
240 | FATTR4_WORD1_FS_LAYOUT_TYPES,
241 FATTR4_WORD2_LAYOUT_BLKSIZE
244 const u32 nfs4_fs_locations_bitmap[3] = {
246 | FATTR4_WORD0_CHANGE
249 | FATTR4_WORD0_FILEID
250 | FATTR4_WORD0_FS_LOCATIONS,
252 | FATTR4_WORD1_NUMLINKS
254 | FATTR4_WORD1_OWNER_GROUP
255 | FATTR4_WORD1_RAWDEV
256 | FATTR4_WORD1_SPACE_USED
257 | FATTR4_WORD1_TIME_ACCESS
258 | FATTR4_WORD1_TIME_METADATA
259 | FATTR4_WORD1_TIME_MODIFY
260 | FATTR4_WORD1_MOUNTED_ON_FILEID,
263 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
264 struct nfs4_readdir_arg *readdir)
269 readdir->cookie = cookie;
270 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
275 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
280 * NFSv4 servers do not return entries for '.' and '..'
281 * Therefore, we fake these entries here. We let '.'
282 * have cookie 0 and '..' have cookie 1. Note that
283 * when talking to the server, we always send cookie 0
286 start = p = kmap_atomic(*readdir->pages);
289 *p++ = xdr_one; /* next */
290 *p++ = xdr_zero; /* cookie, first word */
291 *p++ = xdr_one; /* cookie, second word */
292 *p++ = xdr_one; /* entry len */
293 memcpy(p, ".\0\0\0", 4); /* entry */
295 *p++ = xdr_one; /* bitmap length */
296 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
297 *p++ = htonl(8); /* attribute buffer length */
298 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
301 *p++ = xdr_one; /* next */
302 *p++ = xdr_zero; /* cookie, first word */
303 *p++ = xdr_two; /* cookie, second word */
304 *p++ = xdr_two; /* entry len */
305 memcpy(p, "..\0\0", 4); /* entry */
307 *p++ = xdr_one; /* bitmap length */
308 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
309 *p++ = htonl(8); /* attribute buffer length */
310 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
312 readdir->pgbase = (char *)p - (char *)start;
313 readdir->count -= readdir->pgbase;
314 kunmap_atomic(start);
317 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
324 *timeout = NFS4_POLL_RETRY_MIN;
325 if (*timeout > NFS4_POLL_RETRY_MAX)
326 *timeout = NFS4_POLL_RETRY_MAX;
327 freezable_schedule_timeout_killable_unsafe(*timeout);
328 if (fatal_signal_pending(current))
334 /* This is the error handling routine for processes that are allowed
337 static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
339 struct nfs_client *clp = server->nfs_client;
340 struct nfs4_state *state = exception->state;
341 struct inode *inode = exception->inode;
344 exception->retry = 0;
348 case -NFS4ERR_OPENMODE:
349 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
350 nfs4_inode_return_delegation(inode);
351 exception->retry = 1;
356 ret = nfs4_schedule_stateid_recovery(server, state);
359 goto wait_on_recovery;
360 case -NFS4ERR_DELEG_REVOKED:
361 case -NFS4ERR_ADMIN_REVOKED:
362 case -NFS4ERR_BAD_STATEID:
363 if (inode != NULL && nfs4_have_delegation(inode, FMODE_READ)) {
364 nfs_remove_bad_delegation(inode);
365 exception->retry = 1;
370 ret = nfs4_schedule_stateid_recovery(server, state);
373 goto wait_on_recovery;
374 case -NFS4ERR_EXPIRED:
376 ret = nfs4_schedule_stateid_recovery(server, state);
380 case -NFS4ERR_STALE_STATEID:
381 case -NFS4ERR_STALE_CLIENTID:
382 nfs4_schedule_lease_recovery(clp);
383 goto wait_on_recovery;
385 ret = nfs4_schedule_migration_recovery(server);
388 goto wait_on_recovery;
389 case -NFS4ERR_LEASE_MOVED:
390 nfs4_schedule_lease_moved_recovery(clp);
391 goto wait_on_recovery;
392 #if defined(CONFIG_NFS_V4_1)
393 case -NFS4ERR_BADSESSION:
394 case -NFS4ERR_BADSLOT:
395 case -NFS4ERR_BAD_HIGH_SLOT:
396 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
397 case -NFS4ERR_DEADSESSION:
398 case -NFS4ERR_SEQ_FALSE_RETRY:
399 case -NFS4ERR_SEQ_MISORDERED:
400 dprintk("%s ERROR: %d Reset session\n", __func__,
402 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
403 goto wait_on_recovery;
404 #endif /* defined(CONFIG_NFS_V4_1) */
405 case -NFS4ERR_FILE_OPEN:
406 if (exception->timeout > HZ) {
407 /* We have retried a decent amount, time to
415 ret = nfs4_delay(server->client, &exception->timeout);
418 case -NFS4ERR_RETRY_UNCACHED_REP:
419 case -NFS4ERR_OLD_STATEID:
420 exception->retry = 1;
422 case -NFS4ERR_BADOWNER:
423 /* The following works around a Linux server bug! */
424 case -NFS4ERR_BADNAME:
425 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
426 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
427 exception->retry = 1;
428 printk(KERN_WARNING "NFS: v4 server %s "
429 "does not accept raw "
431 "Reenabling the idmapper.\n",
432 server->nfs_client->cl_hostname);
435 /* We failed to handle the error */
436 return nfs4_map_errors(ret);
438 ret = nfs4_wait_clnt_recover(clp);
439 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
442 exception->retry = 1;
447 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
448 * or 'false' otherwise.
450 static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
452 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
454 if (flavor == RPC_AUTH_GSS_KRB5I ||
455 flavor == RPC_AUTH_GSS_KRB5P)
461 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
463 spin_lock(&clp->cl_lock);
464 if (time_before(clp->cl_last_renewal,timestamp))
465 clp->cl_last_renewal = timestamp;
466 spin_unlock(&clp->cl_lock);
469 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
471 do_renew_lease(server->nfs_client, timestamp);
474 struct nfs4_call_sync_data {
475 const struct nfs_server *seq_server;
476 struct nfs4_sequence_args *seq_args;
477 struct nfs4_sequence_res *seq_res;
480 static void nfs4_init_sequence(struct nfs4_sequence_args *args,
481 struct nfs4_sequence_res *res, int cache_reply)
483 args->sa_slot = NULL;
484 args->sa_cache_this = cache_reply;
485 args->sa_privileged = 0;
490 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
492 args->sa_privileged = 1;
495 static int nfs40_setup_sequence(const struct nfs_server *server,
496 struct nfs4_sequence_args *args,
497 struct nfs4_sequence_res *res,
498 struct rpc_task *task)
500 struct nfs4_slot_table *tbl = server->nfs_client->cl_slot_tbl;
501 struct nfs4_slot *slot;
503 /* slot already allocated? */
504 if (res->sr_slot != NULL)
507 spin_lock(&tbl->slot_tbl_lock);
508 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
511 slot = nfs4_alloc_slot(tbl);
513 if (slot == ERR_PTR(-ENOMEM))
514 task->tk_timeout = HZ >> 2;
517 spin_unlock(&tbl->slot_tbl_lock);
519 args->sa_slot = slot;
523 rpc_call_start(task);
527 if (args->sa_privileged)
528 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
529 NULL, RPC_PRIORITY_PRIVILEGED);
531 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
532 spin_unlock(&tbl->slot_tbl_lock);
536 static int nfs40_sequence_done(struct rpc_task *task,
537 struct nfs4_sequence_res *res)
539 struct nfs4_slot *slot = res->sr_slot;
540 struct nfs4_slot_table *tbl;
546 spin_lock(&tbl->slot_tbl_lock);
547 if (!nfs41_wake_and_assign_slot(tbl, slot))
548 nfs4_free_slot(tbl, slot);
549 spin_unlock(&tbl->slot_tbl_lock);
556 #if defined(CONFIG_NFS_V4_1)
558 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
560 struct nfs4_session *session;
561 struct nfs4_slot_table *tbl;
562 struct nfs4_slot *slot = res->sr_slot;
563 bool send_new_highest_used_slotid = false;
566 session = tbl->session;
568 spin_lock(&tbl->slot_tbl_lock);
569 /* Be nice to the server: try to ensure that the last transmitted
570 * value for highest_user_slotid <= target_highest_slotid
572 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
573 send_new_highest_used_slotid = true;
575 if (nfs41_wake_and_assign_slot(tbl, slot)) {
576 send_new_highest_used_slotid = false;
579 nfs4_free_slot(tbl, slot);
581 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
582 send_new_highest_used_slotid = false;
584 spin_unlock(&tbl->slot_tbl_lock);
586 if (send_new_highest_used_slotid)
587 nfs41_server_notify_highest_slotid_update(session->clp);
590 int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
592 struct nfs4_session *session;
593 struct nfs4_slot *slot = res->sr_slot;
594 struct nfs_client *clp;
595 bool interrupted = false;
600 /* don't increment the sequence number if the task wasn't sent */
601 if (!RPC_WAS_SENT(task))
604 session = slot->table->session;
606 if (slot->interrupted) {
607 slot->interrupted = 0;
611 trace_nfs4_sequence_done(session, res);
612 /* Check the SEQUENCE operation status */
613 switch (res->sr_status) {
615 /* Update the slot's sequence and clientid lease timer */
618 do_renew_lease(clp, res->sr_timestamp);
619 /* Check sequence flags */
620 if (res->sr_status_flags != 0)
621 nfs4_schedule_lease_recovery(clp);
622 nfs41_update_target_slotid(slot->table, slot, res);
626 * sr_status remains 1 if an RPC level error occurred.
627 * The server may or may not have processed the sequence
629 * Mark the slot as having hosted an interrupted RPC call.
631 slot->interrupted = 1;
634 /* The server detected a resend of the RPC call and
635 * returned NFS4ERR_DELAY as per Section 2.10.6.2
638 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
643 case -NFS4ERR_BADSLOT:
645 * The slot id we used was probably retired. Try again
646 * using a different slot id.
649 case -NFS4ERR_SEQ_MISORDERED:
651 * Was the last operation on this sequence interrupted?
652 * If so, retry after bumping the sequence number.
659 * Could this slot have been previously retired?
660 * If so, then the server may be expecting seq_nr = 1!
662 if (slot->seq_nr != 1) {
667 case -NFS4ERR_SEQ_FALSE_RETRY:
671 /* Just update the slot sequence no. */
675 /* The session may be reset by one of the error handlers. */
676 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
677 nfs41_sequence_free_slot(res);
681 if (rpc_restart_call_prepare(task)) {
687 if (!rpc_restart_call(task))
689 rpc_delay(task, NFS4_POLL_RETRY_MAX);
692 EXPORT_SYMBOL_GPL(nfs41_sequence_done);
694 static int nfs4_sequence_done(struct rpc_task *task,
695 struct nfs4_sequence_res *res)
697 if (res->sr_slot == NULL)
699 if (!res->sr_slot->table->session)
700 return nfs40_sequence_done(task, res);
701 return nfs41_sequence_done(task, res);
704 int nfs41_setup_sequence(struct nfs4_session *session,
705 struct nfs4_sequence_args *args,
706 struct nfs4_sequence_res *res,
707 struct rpc_task *task)
709 struct nfs4_slot *slot;
710 struct nfs4_slot_table *tbl;
712 dprintk("--> %s\n", __func__);
713 /* slot already allocated? */
714 if (res->sr_slot != NULL)
717 tbl = &session->fc_slot_table;
719 task->tk_timeout = 0;
721 spin_lock(&tbl->slot_tbl_lock);
722 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
723 !args->sa_privileged) {
724 /* The state manager will wait until the slot table is empty */
725 dprintk("%s session is draining\n", __func__);
729 slot = nfs4_alloc_slot(tbl);
731 /* If out of memory, try again in 1/4 second */
732 if (slot == ERR_PTR(-ENOMEM))
733 task->tk_timeout = HZ >> 2;
734 dprintk("<-- %s: no free slots\n", __func__);
737 spin_unlock(&tbl->slot_tbl_lock);
739 args->sa_slot = slot;
741 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
742 slot->slot_nr, slot->seq_nr);
745 res->sr_timestamp = jiffies;
746 res->sr_status_flags = 0;
748 * sr_status is only set in decode_sequence, and so will remain
749 * set to 1 if an rpc level failure occurs.
752 trace_nfs4_setup_sequence(session, args);
754 rpc_call_start(task);
757 /* Privileged tasks are queued with top priority */
758 if (args->sa_privileged)
759 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
760 NULL, RPC_PRIORITY_PRIVILEGED);
762 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
763 spin_unlock(&tbl->slot_tbl_lock);
766 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
768 static int nfs4_setup_sequence(const struct nfs_server *server,
769 struct nfs4_sequence_args *args,
770 struct nfs4_sequence_res *res,
771 struct rpc_task *task)
773 struct nfs4_session *session = nfs4_get_session(server);
777 return nfs40_setup_sequence(server, args, res, task);
779 dprintk("--> %s clp %p session %p sr_slot %u\n",
780 __func__, session->clp, session, res->sr_slot ?
781 res->sr_slot->slot_nr : NFS4_NO_SLOT);
783 ret = nfs41_setup_sequence(session, args, res, task);
785 dprintk("<-- %s status=%d\n", __func__, ret);
789 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
791 struct nfs4_call_sync_data *data = calldata;
792 struct nfs4_session *session = nfs4_get_session(data->seq_server);
794 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
796 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
799 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
801 struct nfs4_call_sync_data *data = calldata;
803 nfs41_sequence_done(task, data->seq_res);
806 static const struct rpc_call_ops nfs41_call_sync_ops = {
807 .rpc_call_prepare = nfs41_call_sync_prepare,
808 .rpc_call_done = nfs41_call_sync_done,
811 #else /* !CONFIG_NFS_V4_1 */
813 static int nfs4_setup_sequence(const struct nfs_server *server,
814 struct nfs4_sequence_args *args,
815 struct nfs4_sequence_res *res,
816 struct rpc_task *task)
818 return nfs40_setup_sequence(server, args, res, task);
821 static int nfs4_sequence_done(struct rpc_task *task,
822 struct nfs4_sequence_res *res)
824 return nfs40_sequence_done(task, res);
827 #endif /* !CONFIG_NFS_V4_1 */
829 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
831 struct nfs4_call_sync_data *data = calldata;
832 nfs4_setup_sequence(data->seq_server,
833 data->seq_args, data->seq_res, task);
836 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
838 struct nfs4_call_sync_data *data = calldata;
839 nfs4_sequence_done(task, data->seq_res);
842 static const struct rpc_call_ops nfs40_call_sync_ops = {
843 .rpc_call_prepare = nfs40_call_sync_prepare,
844 .rpc_call_done = nfs40_call_sync_done,
847 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
848 struct nfs_server *server,
849 struct rpc_message *msg,
850 struct nfs4_sequence_args *args,
851 struct nfs4_sequence_res *res)
854 struct rpc_task *task;
855 struct nfs_client *clp = server->nfs_client;
856 struct nfs4_call_sync_data data = {
857 .seq_server = server,
861 struct rpc_task_setup task_setup = {
864 .callback_ops = clp->cl_mvops->call_sync_ops,
865 .callback_data = &data
868 task = rpc_run_task(&task_setup);
872 ret = task->tk_status;
879 int nfs4_call_sync(struct rpc_clnt *clnt,
880 struct nfs_server *server,
881 struct rpc_message *msg,
882 struct nfs4_sequence_args *args,
883 struct nfs4_sequence_res *res,
886 nfs4_init_sequence(args, res, cache_reply);
887 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
890 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
892 struct nfs_inode *nfsi = NFS_I(dir);
894 spin_lock(&dir->i_lock);
895 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
896 if (!cinfo->atomic || cinfo->before != dir->i_version)
897 nfs_force_lookup_revalidate(dir);
898 dir->i_version = cinfo->after;
899 nfs_fscache_invalidate(dir);
900 spin_unlock(&dir->i_lock);
903 struct nfs4_opendata {
905 struct nfs_openargs o_arg;
906 struct nfs_openres o_res;
907 struct nfs_open_confirmargs c_arg;
908 struct nfs_open_confirmres c_res;
909 struct nfs4_string owner_name;
910 struct nfs4_string group_name;
911 struct nfs_fattr f_attr;
912 struct nfs4_label *f_label;
914 struct dentry *dentry;
915 struct nfs4_state_owner *owner;
916 struct nfs4_state *state;
918 unsigned long timestamp;
919 unsigned int rpc_done : 1;
920 unsigned int file_created : 1;
921 unsigned int is_recover : 1;
926 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
927 int err, struct nfs4_exception *exception)
931 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
933 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
934 exception->retry = 1;
938 static enum open_claim_type4
939 nfs4_map_atomic_open_claim(struct nfs_server *server,
940 enum open_claim_type4 claim)
942 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
947 case NFS4_OPEN_CLAIM_FH:
948 return NFS4_OPEN_CLAIM_NULL;
949 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
950 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
951 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
952 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
956 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
958 p->o_res.f_attr = &p->f_attr;
959 p->o_res.f_label = p->f_label;
960 p->o_res.seqid = p->o_arg.seqid;
961 p->c_res.seqid = p->c_arg.seqid;
962 p->o_res.server = p->o_arg.server;
963 p->o_res.access_request = p->o_arg.access;
964 nfs_fattr_init(&p->f_attr);
965 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
968 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
969 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
970 const struct iattr *attrs,
971 struct nfs4_label *label,
972 enum open_claim_type4 claim,
975 struct dentry *parent = dget_parent(dentry);
976 struct inode *dir = parent->d_inode;
977 struct nfs_server *server = NFS_SERVER(dir);
978 struct nfs4_opendata *p;
980 p = kzalloc(sizeof(*p), gfp_mask);
984 p->f_label = nfs4_label_alloc(server, gfp_mask);
985 if (IS_ERR(p->f_label))
988 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
989 if (p->o_arg.seqid == NULL)
991 nfs_sb_active(dentry->d_sb);
992 p->dentry = dget(dentry);
995 atomic_inc(&sp->so_count);
996 p->o_arg.open_flags = flags;
997 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
998 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
999 * will return permission denied for all bits until close */
1000 if (!(flags & O_EXCL)) {
1001 /* ask server to check for all possible rights as results
1003 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1004 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
1006 p->o_arg.clientid = server->nfs_client->cl_clientid;
1007 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1008 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
1009 p->o_arg.name = &dentry->d_name;
1010 p->o_arg.server = server;
1011 p->o_arg.bitmask = nfs4_bitmask(server, label);
1012 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1013 p->o_arg.label = label;
1014 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1015 switch (p->o_arg.claim) {
1016 case NFS4_OPEN_CLAIM_NULL:
1017 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1018 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1019 p->o_arg.fh = NFS_FH(dir);
1021 case NFS4_OPEN_CLAIM_PREVIOUS:
1022 case NFS4_OPEN_CLAIM_FH:
1023 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1024 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1025 p->o_arg.fh = NFS_FH(dentry->d_inode);
1027 if (attrs != NULL && attrs->ia_valid != 0) {
1030 p->o_arg.u.attrs = &p->attrs;
1031 memcpy(&p->attrs, attrs, sizeof(p->attrs));
1034 verf[1] = current->pid;
1035 memcpy(p->o_arg.u.verifier.data, verf,
1036 sizeof(p->o_arg.u.verifier.data));
1038 p->c_arg.fh = &p->o_res.fh;
1039 p->c_arg.stateid = &p->o_res.stateid;
1040 p->c_arg.seqid = p->o_arg.seqid;
1041 nfs4_init_opendata_res(p);
1042 kref_init(&p->kref);
1046 nfs4_label_free(p->f_label);
1054 static void nfs4_opendata_free(struct kref *kref)
1056 struct nfs4_opendata *p = container_of(kref,
1057 struct nfs4_opendata, kref);
1058 struct super_block *sb = p->dentry->d_sb;
1060 nfs_free_seqid(p->o_arg.seqid);
1061 if (p->state != NULL)
1062 nfs4_put_open_state(p->state);
1063 nfs4_put_state_owner(p->owner);
1065 nfs4_label_free(p->f_label);
1069 nfs_sb_deactive(sb);
1070 nfs_fattr_free_names(&p->f_attr);
1071 kfree(p->f_attr.mdsthreshold);
1075 static void nfs4_opendata_put(struct nfs4_opendata *p)
1078 kref_put(&p->kref, nfs4_opendata_free);
1081 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1085 ret = rpc_wait_for_completion_task(task);
1089 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
1093 if (open_mode & (O_EXCL|O_TRUNC))
1095 switch (mode & (FMODE_READ|FMODE_WRITE)) {
1097 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1098 && state->n_rdonly != 0;
1101 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1102 && state->n_wronly != 0;
1104 case FMODE_READ|FMODE_WRITE:
1105 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1106 && state->n_rdwr != 0;
1112 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
1114 if (delegation == NULL)
1116 if ((delegation->type & fmode) != fmode)
1118 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1120 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1122 nfs_mark_delegation_referenced(delegation);
1126 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
1135 case FMODE_READ|FMODE_WRITE:
1138 nfs4_state_set_mode_locked(state, state->state | fmode);
1141 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1143 struct nfs_client *clp = state->owner->so_server->nfs_client;
1144 bool need_recover = false;
1146 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1147 need_recover = true;
1148 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1149 need_recover = true;
1150 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1151 need_recover = true;
1153 nfs4_state_mark_reclaim_nograce(clp, state);
1156 static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1157 nfs4_stateid *stateid)
1159 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1161 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1162 nfs_test_and_clear_all_open_stateid(state);
1165 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1170 static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1171 nfs4_stateid *stateid, fmode_t fmode)
1173 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1174 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1176 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1179 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1182 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1183 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1184 clear_bit(NFS_OPEN_STATE, &state->flags);
1186 if (stateid == NULL)
1188 if (!nfs_need_update_open_stateid(state, stateid))
1190 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1191 nfs4_stateid_copy(&state->stateid, stateid);
1192 nfs4_stateid_copy(&state->open_stateid, stateid);
1195 static void nfs_clear_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1197 write_seqlock(&state->seqlock);
1198 nfs_clear_open_stateid_locked(state, stateid, fmode);
1199 write_sequnlock(&state->seqlock);
1200 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1201 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1204 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1208 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1211 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1213 case FMODE_READ|FMODE_WRITE:
1214 set_bit(NFS_O_RDWR_STATE, &state->flags);
1216 if (!nfs_need_update_open_stateid(state, stateid))
1218 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1219 nfs4_stateid_copy(&state->stateid, stateid);
1220 nfs4_stateid_copy(&state->open_stateid, stateid);
1223 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1226 * Protect the call to nfs4_state_set_mode_locked and
1227 * serialise the stateid update
1229 write_seqlock(&state->seqlock);
1230 if (deleg_stateid != NULL) {
1231 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1232 set_bit(NFS_DELEGATED_STATE, &state->flags);
1234 if (open_stateid != NULL)
1235 nfs_set_open_stateid_locked(state, open_stateid, fmode);
1236 write_sequnlock(&state->seqlock);
1237 spin_lock(&state->owner->so_lock);
1238 update_open_stateflags(state, fmode);
1239 spin_unlock(&state->owner->so_lock);
1242 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
1244 struct nfs_inode *nfsi = NFS_I(state->inode);
1245 struct nfs_delegation *deleg_cur;
1248 fmode &= (FMODE_READ|FMODE_WRITE);
1251 deleg_cur = rcu_dereference(nfsi->delegation);
1252 if (deleg_cur == NULL)
1255 spin_lock(&deleg_cur->lock);
1256 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
1257 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
1258 (deleg_cur->type & fmode) != fmode)
1259 goto no_delegation_unlock;
1261 if (delegation == NULL)
1262 delegation = &deleg_cur->stateid;
1263 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1264 goto no_delegation_unlock;
1266 nfs_mark_delegation_referenced(deleg_cur);
1267 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1269 no_delegation_unlock:
1270 spin_unlock(&deleg_cur->lock);
1274 if (!ret && open_stateid != NULL) {
1275 __update_open_stateid(state, open_stateid, NULL, fmode);
1278 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1279 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1285 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1287 struct nfs_delegation *delegation;
1290 delegation = rcu_dereference(NFS_I(inode)->delegation);
1291 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1296 nfs4_inode_return_delegation(inode);
1299 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1301 struct nfs4_state *state = opendata->state;
1302 struct nfs_inode *nfsi = NFS_I(state->inode);
1303 struct nfs_delegation *delegation;
1304 int open_mode = opendata->o_arg.open_flags;
1305 fmode_t fmode = opendata->o_arg.fmode;
1306 nfs4_stateid stateid;
1310 if (can_open_cached(state, fmode, open_mode)) {
1311 spin_lock(&state->owner->so_lock);
1312 if (can_open_cached(state, fmode, open_mode)) {
1313 update_open_stateflags(state, fmode);
1314 spin_unlock(&state->owner->so_lock);
1315 goto out_return_state;
1317 spin_unlock(&state->owner->so_lock);
1320 delegation = rcu_dereference(nfsi->delegation);
1321 if (!can_open_delegated(delegation, fmode)) {
1325 /* Save the delegation */
1326 nfs4_stateid_copy(&stateid, &delegation->stateid);
1328 nfs_release_seqid(opendata->o_arg.seqid);
1329 if (!opendata->is_recover) {
1330 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1336 /* Try to update the stateid using the delegation */
1337 if (update_open_stateid(state, NULL, &stateid, fmode))
1338 goto out_return_state;
1341 return ERR_PTR(ret);
1343 atomic_inc(&state->count);
1348 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1350 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1351 struct nfs_delegation *delegation;
1352 int delegation_flags = 0;
1355 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1357 delegation_flags = delegation->flags;
1359 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1360 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1361 "returning a delegation for "
1362 "OPEN(CLAIM_DELEGATE_CUR)\n",
1364 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1365 nfs_inode_set_delegation(state->inode,
1366 data->owner->so_cred,
1369 nfs_inode_reclaim_delegation(state->inode,
1370 data->owner->so_cred,
1375 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1376 * and update the nfs4_state.
1378 static struct nfs4_state *
1379 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1381 struct inode *inode = data->state->inode;
1382 struct nfs4_state *state = data->state;
1385 if (!data->rpc_done) {
1386 if (data->rpc_status) {
1387 ret = data->rpc_status;
1390 /* cached opens have already been processed */
1394 ret = nfs_refresh_inode(inode, &data->f_attr);
1398 if (data->o_res.delegation_type != 0)
1399 nfs4_opendata_check_deleg(data, state);
1401 update_open_stateid(state, &data->o_res.stateid, NULL,
1403 atomic_inc(&state->count);
1407 return ERR_PTR(ret);
1411 static struct nfs4_state *
1412 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1414 struct inode *inode;
1415 struct nfs4_state *state = NULL;
1418 if (!data->rpc_done) {
1419 state = nfs4_try_open_cached(data);
1424 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1426 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1427 ret = PTR_ERR(inode);
1431 state = nfs4_get_open_state(inode, data->owner);
1434 if (data->o_res.delegation_type != 0)
1435 nfs4_opendata_check_deleg(data, state);
1436 update_open_stateid(state, &data->o_res.stateid, NULL,
1440 nfs_release_seqid(data->o_arg.seqid);
1445 return ERR_PTR(ret);
1448 static struct nfs4_state *
1449 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1451 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1452 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1453 return _nfs4_opendata_to_nfs4_state(data);
1456 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1458 struct nfs_inode *nfsi = NFS_I(state->inode);
1459 struct nfs_open_context *ctx;
1461 spin_lock(&state->inode->i_lock);
1462 list_for_each_entry(ctx, &nfsi->open_files, list) {
1463 if (ctx->state != state)
1465 get_nfs_open_context(ctx);
1466 spin_unlock(&state->inode->i_lock);
1469 spin_unlock(&state->inode->i_lock);
1470 return ERR_PTR(-ENOENT);
1473 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1474 struct nfs4_state *state, enum open_claim_type4 claim)
1476 struct nfs4_opendata *opendata;
1478 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1479 NULL, NULL, claim, GFP_NOFS);
1480 if (opendata == NULL)
1481 return ERR_PTR(-ENOMEM);
1482 opendata->state = state;
1483 atomic_inc(&state->count);
1487 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1489 struct nfs4_state *newstate;
1492 opendata->o_arg.open_flags = 0;
1493 opendata->o_arg.fmode = fmode;
1494 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1495 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1496 nfs4_init_opendata_res(opendata);
1497 ret = _nfs4_recover_proc_open(opendata);
1500 newstate = nfs4_opendata_to_nfs4_state(opendata);
1501 if (IS_ERR(newstate))
1502 return PTR_ERR(newstate);
1503 nfs4_close_state(newstate, fmode);
1508 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1510 struct nfs4_state *newstate;
1513 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1514 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1515 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1516 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1517 /* memory barrier prior to reading state->n_* */
1518 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1519 clear_bit(NFS_OPEN_STATE, &state->flags);
1521 if (state->n_rdwr != 0) {
1522 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1525 if (newstate != state)
1528 if (state->n_wronly != 0) {
1529 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1532 if (newstate != state)
1535 if (state->n_rdonly != 0) {
1536 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1539 if (newstate != state)
1543 * We may have performed cached opens for all three recoveries.
1544 * Check if we need to update the current stateid.
1546 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1547 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1548 write_seqlock(&state->seqlock);
1549 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1550 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1551 write_sequnlock(&state->seqlock);
1558 * reclaim state on the server after a reboot.
1560 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1562 struct nfs_delegation *delegation;
1563 struct nfs4_opendata *opendata;
1564 fmode_t delegation_type = 0;
1567 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1568 NFS4_OPEN_CLAIM_PREVIOUS);
1569 if (IS_ERR(opendata))
1570 return PTR_ERR(opendata);
1572 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1573 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1574 delegation_type = delegation->type;
1576 opendata->o_arg.u.delegation_type = delegation_type;
1577 status = nfs4_open_recover(opendata, state);
1578 nfs4_opendata_put(opendata);
1582 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1584 struct nfs_server *server = NFS_SERVER(state->inode);
1585 struct nfs4_exception exception = { };
1588 err = _nfs4_do_open_reclaim(ctx, state);
1589 trace_nfs4_open_reclaim(ctx, 0, err);
1590 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1592 if (err != -NFS4ERR_DELAY)
1594 nfs4_handle_exception(server, err, &exception);
1595 } while (exception.retry);
1599 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1601 struct nfs_open_context *ctx;
1604 ctx = nfs4_state_find_open_context(state);
1607 ret = nfs4_do_open_reclaim(ctx, state);
1608 put_nfs_open_context(ctx);
1612 static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1616 printk(KERN_ERR "NFS: %s: unhandled error "
1617 "%d.\n", __func__, err);
1622 case -NFS4ERR_BADSESSION:
1623 case -NFS4ERR_BADSLOT:
1624 case -NFS4ERR_BAD_HIGH_SLOT:
1625 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1626 case -NFS4ERR_DEADSESSION:
1627 set_bit(NFS_DELEGATED_STATE, &state->flags);
1628 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1630 case -NFS4ERR_STALE_CLIENTID:
1631 case -NFS4ERR_STALE_STATEID:
1632 set_bit(NFS_DELEGATED_STATE, &state->flags);
1633 case -NFS4ERR_EXPIRED:
1634 /* Don't recall a delegation if it was lost */
1635 nfs4_schedule_lease_recovery(server->nfs_client);
1637 case -NFS4ERR_MOVED:
1638 nfs4_schedule_migration_recovery(server);
1640 case -NFS4ERR_LEASE_MOVED:
1641 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1643 case -NFS4ERR_DELEG_REVOKED:
1644 case -NFS4ERR_ADMIN_REVOKED:
1645 case -NFS4ERR_BAD_STATEID:
1646 case -NFS4ERR_OPENMODE:
1647 nfs_inode_find_state_and_recover(state->inode,
1649 nfs4_schedule_stateid_recovery(server, state);
1651 case -NFS4ERR_DELAY:
1652 case -NFS4ERR_GRACE:
1653 set_bit(NFS_DELEGATED_STATE, &state->flags);
1657 case -NFS4ERR_DENIED:
1658 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1664 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1666 struct nfs_server *server = NFS_SERVER(state->inode);
1667 struct nfs4_opendata *opendata;
1670 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1671 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1672 if (IS_ERR(opendata))
1673 return PTR_ERR(opendata);
1674 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1675 err = nfs4_open_recover(opendata, state);
1676 nfs4_opendata_put(opendata);
1677 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1680 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1682 struct nfs4_opendata *data = calldata;
1684 nfs40_setup_sequence(data->o_arg.server, &data->c_arg.seq_args,
1685 &data->c_res.seq_res, task);
1688 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1690 struct nfs4_opendata *data = calldata;
1692 nfs40_sequence_done(task, &data->c_res.seq_res);
1694 data->rpc_status = task->tk_status;
1695 if (data->rpc_status == 0) {
1696 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1697 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1698 renew_lease(data->o_res.server, data->timestamp);
1703 static void nfs4_open_confirm_release(void *calldata)
1705 struct nfs4_opendata *data = calldata;
1706 struct nfs4_state *state = NULL;
1708 /* If this request hasn't been cancelled, do nothing */
1709 if (data->cancelled == 0)
1711 /* In case of error, no cleanup! */
1712 if (!data->rpc_done)
1714 state = nfs4_opendata_to_nfs4_state(data);
1716 nfs4_close_state(state, data->o_arg.fmode);
1718 nfs4_opendata_put(data);
1721 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1722 .rpc_call_prepare = nfs4_open_confirm_prepare,
1723 .rpc_call_done = nfs4_open_confirm_done,
1724 .rpc_release = nfs4_open_confirm_release,
1728 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1730 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1732 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1733 struct rpc_task *task;
1734 struct rpc_message msg = {
1735 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1736 .rpc_argp = &data->c_arg,
1737 .rpc_resp = &data->c_res,
1738 .rpc_cred = data->owner->so_cred,
1740 struct rpc_task_setup task_setup_data = {
1741 .rpc_client = server->client,
1742 .rpc_message = &msg,
1743 .callback_ops = &nfs4_open_confirm_ops,
1744 .callback_data = data,
1745 .workqueue = nfsiod_workqueue,
1746 .flags = RPC_TASK_ASYNC,
1750 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
1751 kref_get(&data->kref);
1753 data->rpc_status = 0;
1754 data->timestamp = jiffies;
1755 task = rpc_run_task(&task_setup_data);
1757 return PTR_ERR(task);
1758 status = nfs4_wait_for_completion_rpc_task(task);
1760 data->cancelled = 1;
1763 status = data->rpc_status;
1768 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1770 struct nfs4_opendata *data = calldata;
1771 struct nfs4_state_owner *sp = data->owner;
1772 struct nfs_client *clp = sp->so_server->nfs_client;
1774 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1777 * Check if we still need to send an OPEN call, or if we can use
1778 * a delegation instead.
1780 if (data->state != NULL) {
1781 struct nfs_delegation *delegation;
1783 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1786 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1787 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1788 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
1789 can_open_delegated(delegation, data->o_arg.fmode))
1790 goto unlock_no_action;
1793 /* Update client id. */
1794 data->o_arg.clientid = clp->cl_clientid;
1795 switch (data->o_arg.claim) {
1796 case NFS4_OPEN_CLAIM_PREVIOUS:
1797 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1798 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1799 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
1800 case NFS4_OPEN_CLAIM_FH:
1801 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1802 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1804 data->timestamp = jiffies;
1805 if (nfs4_setup_sequence(data->o_arg.server,
1806 &data->o_arg.seq_args,
1807 &data->o_res.seq_res,
1809 nfs_release_seqid(data->o_arg.seqid);
1811 /* Set the create mode (note dependency on the session type) */
1812 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1813 if (data->o_arg.open_flags & O_EXCL) {
1814 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1815 if (nfs4_has_persistent_session(clp))
1816 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1817 else if (clp->cl_mvops->minor_version > 0)
1818 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1824 task->tk_action = NULL;
1826 nfs4_sequence_done(task, &data->o_res.seq_res);
1829 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1831 struct nfs4_opendata *data = calldata;
1833 data->rpc_status = task->tk_status;
1835 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1838 if (task->tk_status == 0) {
1839 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1840 switch (data->o_res.f_attr->mode & S_IFMT) {
1844 data->rpc_status = -ELOOP;
1847 data->rpc_status = -EISDIR;
1850 data->rpc_status = -ENOTDIR;
1853 renew_lease(data->o_res.server, data->timestamp);
1854 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1855 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1860 static void nfs4_open_release(void *calldata)
1862 struct nfs4_opendata *data = calldata;
1863 struct nfs4_state *state = NULL;
1865 /* If this request hasn't been cancelled, do nothing */
1866 if (data->cancelled == 0)
1868 /* In case of error, no cleanup! */
1869 if (data->rpc_status != 0 || !data->rpc_done)
1871 /* In case we need an open_confirm, no cleanup! */
1872 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1874 state = nfs4_opendata_to_nfs4_state(data);
1876 nfs4_close_state(state, data->o_arg.fmode);
1878 nfs4_opendata_put(data);
1881 static const struct rpc_call_ops nfs4_open_ops = {
1882 .rpc_call_prepare = nfs4_open_prepare,
1883 .rpc_call_done = nfs4_open_done,
1884 .rpc_release = nfs4_open_release,
1887 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1889 struct inode *dir = data->dir->d_inode;
1890 struct nfs_server *server = NFS_SERVER(dir);
1891 struct nfs_openargs *o_arg = &data->o_arg;
1892 struct nfs_openres *o_res = &data->o_res;
1893 struct rpc_task *task;
1894 struct rpc_message msg = {
1895 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1898 .rpc_cred = data->owner->so_cred,
1900 struct rpc_task_setup task_setup_data = {
1901 .rpc_client = server->client,
1902 .rpc_message = &msg,
1903 .callback_ops = &nfs4_open_ops,
1904 .callback_data = data,
1905 .workqueue = nfsiod_workqueue,
1906 .flags = RPC_TASK_ASYNC,
1910 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1911 kref_get(&data->kref);
1913 data->rpc_status = 0;
1914 data->cancelled = 0;
1915 data->is_recover = 0;
1917 nfs4_set_sequence_privileged(&o_arg->seq_args);
1918 data->is_recover = 1;
1920 task = rpc_run_task(&task_setup_data);
1922 return PTR_ERR(task);
1923 status = nfs4_wait_for_completion_rpc_task(task);
1925 data->cancelled = 1;
1928 status = data->rpc_status;
1934 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1936 struct inode *dir = data->dir->d_inode;
1937 struct nfs_openres *o_res = &data->o_res;
1940 status = nfs4_run_open_task(data, 1);
1941 if (status != 0 || !data->rpc_done)
1944 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1946 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1947 status = _nfs4_proc_open_confirm(data);
1956 * Additional permission checks in order to distinguish between an
1957 * open for read, and an open for execute. This works around the
1958 * fact that NFSv4 OPEN treats read and execute permissions as being
1960 * Note that in the non-execute case, we want to turn off permission
1961 * checking if we just created a new file (POSIX open() semantics).
1963 static int nfs4_opendata_access(struct rpc_cred *cred,
1964 struct nfs4_opendata *opendata,
1965 struct nfs4_state *state, fmode_t fmode,
1968 struct nfs_access_entry cache;
1971 /* access call failed or for some reason the server doesn't
1972 * support any access modes -- defer access call until later */
1973 if (opendata->o_res.access_supported == 0)
1978 * Use openflags to check for exec, because fmode won't
1979 * always have FMODE_EXEC set when file open for exec.
1981 if (openflags & __FMODE_EXEC) {
1982 /* ONLY check for exec rights */
1984 } else if ((fmode & FMODE_READ) && !opendata->file_created)
1988 cache.jiffies = jiffies;
1989 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1990 nfs_access_add_cache(state->inode, &cache);
1992 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
1995 /* even though OPEN succeeded, access is denied. Close the file */
1996 nfs4_close_state(state, fmode);
2001 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2003 static int _nfs4_proc_open(struct nfs4_opendata *data)
2005 struct inode *dir = data->dir->d_inode;
2006 struct nfs_server *server = NFS_SERVER(dir);
2007 struct nfs_openargs *o_arg = &data->o_arg;
2008 struct nfs_openres *o_res = &data->o_res;
2011 status = nfs4_run_open_task(data, 0);
2012 if (!data->rpc_done)
2015 if (status == -NFS4ERR_BADNAME &&
2016 !(o_arg->open_flags & O_CREAT))
2021 nfs_fattr_map_and_free_names(server, &data->f_attr);
2023 if (o_arg->open_flags & O_CREAT) {
2024 update_changeattr(dir, &o_res->cinfo);
2025 if (o_arg->open_flags & O_EXCL)
2026 data->file_created = 1;
2027 else if (o_res->cinfo.before != o_res->cinfo.after)
2028 data->file_created = 1;
2030 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2031 server->caps &= ~NFS_CAP_POSIX_LOCK;
2032 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2033 status = _nfs4_proc_open_confirm(data);
2037 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
2038 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
2042 static int nfs4_recover_expired_lease(struct nfs_server *server)
2044 return nfs4_client_recover_expired_lease(server->nfs_client);
2049 * reclaim state on the server after a network partition.
2050 * Assumes caller holds the appropriate lock
2052 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2054 struct nfs4_opendata *opendata;
2057 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2058 NFS4_OPEN_CLAIM_FH);
2059 if (IS_ERR(opendata))
2060 return PTR_ERR(opendata);
2061 ret = nfs4_open_recover(opendata, state);
2063 d_drop(ctx->dentry);
2064 nfs4_opendata_put(opendata);
2068 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2070 struct nfs_server *server = NFS_SERVER(state->inode);
2071 struct nfs4_exception exception = { };
2075 err = _nfs4_open_expired(ctx, state);
2076 trace_nfs4_open_expired(ctx, 0, err);
2077 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2082 case -NFS4ERR_GRACE:
2083 case -NFS4ERR_DELAY:
2084 nfs4_handle_exception(server, err, &exception);
2087 } while (exception.retry);
2092 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2094 struct nfs_open_context *ctx;
2097 ctx = nfs4_state_find_open_context(state);
2100 ret = nfs4_do_open_expired(ctx, state);
2101 put_nfs_open_context(ctx);
2105 #if defined(CONFIG_NFS_V4_1)
2106 static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
2108 struct nfs_server *server = NFS_SERVER(state->inode);
2109 nfs4_stateid *stateid = &state->stateid;
2110 struct nfs_delegation *delegation;
2111 struct rpc_cred *cred = NULL;
2112 int status = -NFS4ERR_BAD_STATEID;
2114 /* If a state reset has been done, test_stateid is unneeded */
2115 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
2118 /* Get the delegation credential for use by test/free_stateid */
2120 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2121 if (delegation != NULL &&
2122 nfs4_stateid_match(&delegation->stateid, stateid)) {
2123 cred = get_rpccred(delegation->cred);
2125 status = nfs41_test_stateid(server, stateid, cred);
2126 trace_nfs4_test_delegation_stateid(state, NULL, status);
2130 if (status != NFS_OK) {
2131 /* Free the stateid unless the server explicitly
2132 * informs us the stateid is unrecognized. */
2133 if (status != -NFS4ERR_BAD_STATEID)
2134 nfs41_free_stateid(server, stateid, cred);
2135 nfs_remove_bad_delegation(state->inode);
2137 write_seqlock(&state->seqlock);
2138 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2139 write_sequnlock(&state->seqlock);
2140 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2148 * nfs41_check_open_stateid - possibly free an open stateid
2150 * @state: NFSv4 state for an inode
2152 * Returns NFS_OK if recovery for this stateid is now finished.
2153 * Otherwise a negative NFS4ERR value is returned.
2155 static int nfs41_check_open_stateid(struct nfs4_state *state)
2157 struct nfs_server *server = NFS_SERVER(state->inode);
2158 nfs4_stateid *stateid = &state->open_stateid;
2159 struct rpc_cred *cred = state->owner->so_cred;
2162 /* If a state reset has been done, test_stateid is unneeded */
2163 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2164 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2165 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2166 return -NFS4ERR_BAD_STATEID;
2168 status = nfs41_test_stateid(server, stateid, cred);
2169 trace_nfs4_test_open_stateid(state, NULL, status);
2170 if (status != NFS_OK) {
2171 /* Free the stateid unless the server explicitly
2172 * informs us the stateid is unrecognized. */
2173 if (status != -NFS4ERR_BAD_STATEID)
2174 nfs41_free_stateid(server, stateid, cred);
2176 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2177 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2178 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2179 clear_bit(NFS_OPEN_STATE, &state->flags);
2184 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2188 nfs41_clear_delegation_stateid(state);
2189 status = nfs41_check_open_stateid(state);
2190 if (status != NFS_OK)
2191 status = nfs4_open_expired(sp, state);
2197 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2198 * fields corresponding to attributes that were used to store the verifier.
2199 * Make sure we clobber those fields in the later setattr call
2201 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2203 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2204 !(sattr->ia_valid & ATTR_ATIME_SET))
2205 sattr->ia_valid |= ATTR_ATIME;
2207 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2208 !(sattr->ia_valid & ATTR_MTIME_SET))
2209 sattr->ia_valid |= ATTR_MTIME;
2212 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2215 struct nfs_open_context *ctx)
2217 struct nfs4_state_owner *sp = opendata->owner;
2218 struct nfs_server *server = sp->so_server;
2219 struct dentry *dentry;
2220 struct nfs4_state *state;
2224 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2226 ret = _nfs4_proc_open(opendata);
2228 if (ret == -ENOENT) {
2229 dentry = opendata->dentry;
2230 if (dentry->d_inode)
2232 else if (d_unhashed(dentry))
2233 d_add(dentry, NULL);
2235 nfs_set_verifier(dentry,
2236 nfs_save_change_attribute(opendata->dir->d_inode));
2241 state = nfs4_opendata_to_nfs4_state(opendata);
2242 ret = PTR_ERR(state);
2245 if (server->caps & NFS_CAP_POSIX_LOCK)
2246 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2248 dentry = opendata->dentry;
2249 if (dentry->d_inode == NULL) {
2250 /* FIXME: Is this d_drop() ever needed? */
2252 dentry = d_add_unique(dentry, igrab(state->inode));
2253 if (dentry == NULL) {
2254 dentry = opendata->dentry;
2255 } else if (dentry != ctx->dentry) {
2257 ctx->dentry = dget(dentry);
2259 nfs_set_verifier(dentry,
2260 nfs_save_change_attribute(opendata->dir->d_inode));
2263 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2268 if (dentry->d_inode == state->inode) {
2269 nfs_inode_attach_open_context(ctx);
2270 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2271 nfs4_schedule_stateid_recovery(server, state);
2278 * Returns a referenced nfs4_state
2280 static int _nfs4_do_open(struct inode *dir,
2281 struct nfs_open_context *ctx,
2283 struct iattr *sattr,
2284 struct nfs4_label *label,
2287 struct nfs4_state_owner *sp;
2288 struct nfs4_state *state = NULL;
2289 struct nfs_server *server = NFS_SERVER(dir);
2290 struct nfs4_opendata *opendata;
2291 struct dentry *dentry = ctx->dentry;
2292 struct rpc_cred *cred = ctx->cred;
2293 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2294 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
2295 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
2296 struct nfs4_label *olabel = NULL;
2299 /* Protect against reboot recovery conflicts */
2301 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2303 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2306 status = nfs4_recover_expired_lease(server);
2308 goto err_put_state_owner;
2309 if (dentry->d_inode != NULL)
2310 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
2312 if (dentry->d_inode)
2313 claim = NFS4_OPEN_CLAIM_FH;
2314 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
2315 label, claim, GFP_KERNEL);
2316 if (opendata == NULL)
2317 goto err_put_state_owner;
2320 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2321 if (IS_ERR(olabel)) {
2322 status = PTR_ERR(olabel);
2323 goto err_opendata_put;
2327 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2328 if (!opendata->f_attr.mdsthreshold) {
2329 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2330 if (!opendata->f_attr.mdsthreshold)
2331 goto err_free_label;
2333 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
2335 if (dentry->d_inode != NULL)
2336 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
2338 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
2340 goto err_free_label;
2343 if ((opendata->o_arg.open_flags & O_EXCL) &&
2344 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
2345 nfs4_exclusive_attrset(opendata, sattr);
2347 nfs_fattr_init(opendata->o_res.f_attr);
2348 status = nfs4_do_setattr(state->inode, cred,
2349 opendata->o_res.f_attr, sattr,
2350 state, label, olabel);
2352 nfs_setattr_update_inode(state->inode, sattr);
2353 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2354 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2357 if (opendata->file_created)
2358 *opened |= FILE_CREATED;
2360 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
2361 *ctx_th = opendata->f_attr.mdsthreshold;
2362 opendata->f_attr.mdsthreshold = NULL;
2365 nfs4_label_free(olabel);
2367 nfs4_opendata_put(opendata);
2368 nfs4_put_state_owner(sp);
2371 nfs4_label_free(olabel);
2373 nfs4_opendata_put(opendata);
2374 err_put_state_owner:
2375 nfs4_put_state_owner(sp);
2381 static struct nfs4_state *nfs4_do_open(struct inode *dir,
2382 struct nfs_open_context *ctx,
2384 struct iattr *sattr,
2385 struct nfs4_label *label,
2388 struct nfs_server *server = NFS_SERVER(dir);
2389 struct nfs4_exception exception = { };
2390 struct nfs4_state *res;
2394 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
2396 trace_nfs4_open_file(ctx, flags, status);
2399 /* NOTE: BAD_SEQID means the server and client disagree about the
2400 * book-keeping w.r.t. state-changing operations
2401 * (OPEN/CLOSE/LOCK/LOCKU...)
2402 * It is actually a sign of a bug on the client or on the server.
2404 * If we receive a BAD_SEQID error in the particular case of
2405 * doing an OPEN, we assume that nfs_increment_open_seqid() will
2406 * have unhashed the old state_owner for us, and that we can
2407 * therefore safely retry using a new one. We should still warn
2408 * the user though...
2410 if (status == -NFS4ERR_BAD_SEQID) {
2411 pr_warn_ratelimited("NFS: v4 server %s "
2412 " returned a bad sequence-id error!\n",
2413 NFS_SERVER(dir)->nfs_client->cl_hostname);
2414 exception.retry = 1;
2418 * BAD_STATEID on OPEN means that the server cancelled our
2419 * state before it received the OPEN_CONFIRM.
2420 * Recover by retrying the request as per the discussion
2421 * on Page 181 of RFC3530.
2423 if (status == -NFS4ERR_BAD_STATEID) {
2424 exception.retry = 1;
2427 if (status == -EAGAIN) {
2428 /* We must have found a delegation */
2429 exception.retry = 1;
2432 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2434 res = ERR_PTR(nfs4_handle_exception(server,
2435 status, &exception));
2436 } while (exception.retry);
2440 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2441 struct nfs_fattr *fattr, struct iattr *sattr,
2442 struct nfs4_state *state, struct nfs4_label *ilabel,
2443 struct nfs4_label *olabel)
2445 struct nfs_server *server = NFS_SERVER(inode);
2446 struct nfs_setattrargs arg = {
2447 .fh = NFS_FH(inode),
2450 .bitmask = server->attr_bitmask,
2453 struct nfs_setattrres res = {
2458 struct rpc_message msg = {
2459 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2464 unsigned long timestamp = jiffies;
2469 arg.bitmask = nfs4_bitmask(server, ilabel);
2471 arg.bitmask = nfs4_bitmask(server, olabel);
2473 nfs_fattr_init(fattr);
2475 /* Servers should only apply open mode checks for file size changes */
2476 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2477 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2479 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2480 /* Use that stateid */
2481 } else if (truncate && state != NULL) {
2482 struct nfs_lockowner lockowner = {
2483 .l_owner = current->files,
2484 .l_pid = current->tgid,
2486 if (!nfs4_valid_open_stateid(state))
2488 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2489 &lockowner) == -EIO)
2492 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
2494 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2495 if (status == 0 && state != NULL)
2496 renew_lease(server, timestamp);
2500 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2501 struct nfs_fattr *fattr, struct iattr *sattr,
2502 struct nfs4_state *state, struct nfs4_label *ilabel,
2503 struct nfs4_label *olabel)
2505 struct nfs_server *server = NFS_SERVER(inode);
2506 struct nfs4_exception exception = {
2512 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
2513 trace_nfs4_setattr(inode, err);
2515 case -NFS4ERR_OPENMODE:
2516 if (!(sattr->ia_valid & ATTR_SIZE)) {
2517 pr_warn_once("NFSv4: server %s is incorrectly "
2518 "applying open mode checks to "
2519 "a SETATTR that is not "
2520 "changing file size.\n",
2521 server->nfs_client->cl_hostname);
2523 if (state && !(state->state & FMODE_WRITE)) {
2525 if (sattr->ia_valid & ATTR_OPEN)
2530 err = nfs4_handle_exception(server, err, &exception);
2531 } while (exception.retry);
2536 struct nfs4_closedata {
2537 struct inode *inode;
2538 struct nfs4_state *state;
2539 struct nfs_closeargs arg;
2540 struct nfs_closeres res;
2541 struct nfs_fattr fattr;
2542 unsigned long timestamp;
2547 static void nfs4_free_closedata(void *data)
2549 struct nfs4_closedata *calldata = data;
2550 struct nfs4_state_owner *sp = calldata->state->owner;
2551 struct super_block *sb = calldata->state->inode->i_sb;
2554 pnfs_roc_release(calldata->state->inode);
2555 nfs4_put_open_state(calldata->state);
2556 nfs_free_seqid(calldata->arg.seqid);
2557 nfs4_put_state_owner(sp);
2558 nfs_sb_deactive(sb);
2562 static void nfs4_close_done(struct rpc_task *task, void *data)
2564 struct nfs4_closedata *calldata = data;
2565 struct nfs4_state *state = calldata->state;
2566 struct nfs_server *server = NFS_SERVER(calldata->inode);
2567 nfs4_stateid *res_stateid = NULL;
2569 dprintk("%s: begin!\n", __func__);
2570 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2572 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
2573 /* hmm. we are done with the inode, and in the process of freeing
2574 * the state_owner. we keep this around to process errors
2576 switch (task->tk_status) {
2578 res_stateid = &calldata->res.stateid;
2579 if (calldata->arg.fmode == 0 && calldata->roc)
2580 pnfs_roc_set_barrier(state->inode,
2581 calldata->roc_barrier);
2582 renew_lease(server, calldata->timestamp);
2584 case -NFS4ERR_ADMIN_REVOKED:
2585 case -NFS4ERR_STALE_STATEID:
2586 case -NFS4ERR_OLD_STATEID:
2587 case -NFS4ERR_BAD_STATEID:
2588 case -NFS4ERR_EXPIRED:
2589 if (calldata->arg.fmode == 0)
2592 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
2593 rpc_restart_call_prepare(task);
2597 nfs_clear_open_stateid(state, res_stateid, calldata->arg.fmode);
2599 nfs_release_seqid(calldata->arg.seqid);
2600 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2601 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2604 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2606 struct nfs4_closedata *calldata = data;
2607 struct nfs4_state *state = calldata->state;
2608 struct inode *inode = calldata->inode;
2609 bool is_rdonly, is_wronly, is_rdwr;
2612 dprintk("%s: begin!\n", __func__);
2613 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2616 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2617 spin_lock(&state->owner->so_lock);
2618 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2619 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2620 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
2621 /* Calculate the change in open mode */
2622 calldata->arg.fmode = 0;
2623 if (state->n_rdwr == 0) {
2624 if (state->n_rdonly == 0)
2625 call_close |= is_rdonly;
2627 calldata->arg.fmode |= FMODE_READ;
2628 if (state->n_wronly == 0)
2629 call_close |= is_wronly;
2631 calldata->arg.fmode |= FMODE_WRITE;
2633 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2635 if (calldata->arg.fmode == 0)
2636 call_close |= is_rdwr;
2638 if (!nfs4_valid_open_stateid(state))
2640 spin_unlock(&state->owner->so_lock);
2643 /* Note: exit _without_ calling nfs4_close_done */
2647 if (calldata->arg.fmode == 0) {
2648 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2649 if (calldata->roc &&
2650 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2651 nfs_release_seqid(calldata->arg.seqid);
2656 nfs_fattr_init(calldata->res.fattr);
2657 calldata->timestamp = jiffies;
2658 if (nfs4_setup_sequence(NFS_SERVER(inode),
2659 &calldata->arg.seq_args,
2660 &calldata->res.seq_res,
2662 nfs_release_seqid(calldata->arg.seqid);
2663 dprintk("%s: done!\n", __func__);
2666 task->tk_action = NULL;
2668 nfs4_sequence_done(task, &calldata->res.seq_res);
2671 static const struct rpc_call_ops nfs4_close_ops = {
2672 .rpc_call_prepare = nfs4_close_prepare,
2673 .rpc_call_done = nfs4_close_done,
2674 .rpc_release = nfs4_free_closedata,
2677 static bool nfs4_state_has_opener(struct nfs4_state *state)
2679 /* first check existing openers */
2680 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 &&
2681 state->n_rdonly != 0)
2684 if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 &&
2685 state->n_wronly != 0)
2688 if (test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 &&
2695 static bool nfs4_roc(struct inode *inode)
2697 struct nfs_inode *nfsi = NFS_I(inode);
2698 struct nfs_open_context *ctx;
2699 struct nfs4_state *state;
2701 spin_lock(&inode->i_lock);
2702 list_for_each_entry(ctx, &nfsi->open_files, list) {
2706 if (nfs4_state_has_opener(state)) {
2707 spin_unlock(&inode->i_lock);
2711 spin_unlock(&inode->i_lock);
2713 if (nfs4_check_delegation(inode, FMODE_READ))
2716 return pnfs_roc(inode);
2720 * It is possible for data to be read/written from a mem-mapped file
2721 * after the sys_close call (which hits the vfs layer as a flush).
2722 * This means that we can't safely call nfsv4 close on a file until
2723 * the inode is cleared. This in turn means that we are not good
2724 * NFSv4 citizens - we do not indicate to the server to update the file's
2725 * share state even when we are done with one of the three share
2726 * stateid's in the inode.
2728 * NOTE: Caller must be holding the sp->so_owner semaphore!
2730 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
2732 struct nfs_server *server = NFS_SERVER(state->inode);
2733 struct nfs4_closedata *calldata;
2734 struct nfs4_state_owner *sp = state->owner;
2735 struct rpc_task *task;
2736 struct rpc_message msg = {
2737 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2738 .rpc_cred = state->owner->so_cred,
2740 struct rpc_task_setup task_setup_data = {
2741 .rpc_client = server->client,
2742 .rpc_message = &msg,
2743 .callback_ops = &nfs4_close_ops,
2744 .workqueue = nfsiod_workqueue,
2745 .flags = RPC_TASK_ASYNC,
2747 int status = -ENOMEM;
2749 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2750 &task_setup_data.rpc_client, &msg);
2752 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2753 if (calldata == NULL)
2755 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2756 calldata->inode = state->inode;
2757 calldata->state = state;
2758 calldata->arg.fh = NFS_FH(state->inode);
2759 calldata->arg.stateid = &state->open_stateid;
2760 /* Serialization for the sequence id */
2761 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2762 if (calldata->arg.seqid == NULL)
2763 goto out_free_calldata;
2764 calldata->arg.fmode = 0;
2765 calldata->arg.bitmask = server->cache_consistency_bitmask;
2766 calldata->res.fattr = &calldata->fattr;
2767 calldata->res.seqid = calldata->arg.seqid;
2768 calldata->res.server = server;
2769 calldata->roc = nfs4_roc(state->inode);
2770 nfs_sb_active(calldata->inode->i_sb);
2772 msg.rpc_argp = &calldata->arg;
2773 msg.rpc_resp = &calldata->res;
2774 task_setup_data.callback_data = calldata;
2775 task = rpc_run_task(&task_setup_data);
2777 return PTR_ERR(task);
2780 status = rpc_wait_for_completion_task(task);
2786 nfs4_put_open_state(state);
2787 nfs4_put_state_owner(sp);
2791 static struct inode *
2792 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2793 int open_flags, struct iattr *attr, int *opened)
2795 struct nfs4_state *state;
2796 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2798 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
2800 /* Protect against concurrent sillydeletes */
2801 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
2803 nfs4_label_release_security(label);
2806 return ERR_CAST(state);
2807 return state->inode;
2810 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2812 if (ctx->state == NULL)
2815 nfs4_close_sync(ctx->state, ctx->mode);
2817 nfs4_close_state(ctx->state, ctx->mode);
2820 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2821 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
2822 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
2824 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2826 struct nfs4_server_caps_arg args = {
2829 struct nfs4_server_caps_res res = {};
2830 struct rpc_message msg = {
2831 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2837 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2839 /* Sanity check the server answers */
2840 switch (server->nfs_client->cl_minorversion) {
2842 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2843 res.attr_bitmask[2] = 0;
2846 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2849 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2851 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2852 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2853 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2854 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2855 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2856 NFS_CAP_CTIME|NFS_CAP_MTIME|
2857 NFS_CAP_SECURITY_LABEL);
2858 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2859 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2860 server->caps |= NFS_CAP_ACLS;
2861 if (res.has_links != 0)
2862 server->caps |= NFS_CAP_HARDLINKS;
2863 if (res.has_symlinks != 0)
2864 server->caps |= NFS_CAP_SYMLINKS;
2865 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2866 server->caps |= NFS_CAP_FILEID;
2867 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2868 server->caps |= NFS_CAP_MODE;
2869 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2870 server->caps |= NFS_CAP_NLINK;
2871 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2872 server->caps |= NFS_CAP_OWNER;
2873 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2874 server->caps |= NFS_CAP_OWNER_GROUP;
2875 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2876 server->caps |= NFS_CAP_ATIME;
2877 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2878 server->caps |= NFS_CAP_CTIME;
2879 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2880 server->caps |= NFS_CAP_MTIME;
2881 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
2882 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2883 server->caps |= NFS_CAP_SECURITY_LABEL;
2885 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2886 sizeof(server->attr_bitmask));
2887 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2889 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2890 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2891 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2892 server->cache_consistency_bitmask[2] = 0;
2893 server->acl_bitmask = res.acl_bitmask;
2894 server->fh_expire_type = res.fh_expire_type;
2900 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2902 struct nfs4_exception exception = { };
2905 err = nfs4_handle_exception(server,
2906 _nfs4_server_capabilities(server, fhandle),
2908 } while (exception.retry);
2912 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2913 struct nfs_fsinfo *info)
2916 struct nfs4_lookup_root_arg args = {
2919 struct nfs4_lookup_res res = {
2921 .fattr = info->fattr,
2924 struct rpc_message msg = {
2925 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2930 bitmask[0] = nfs4_fattr_bitmap[0];
2931 bitmask[1] = nfs4_fattr_bitmap[1];
2933 * Process the label in the upcoming getfattr
2935 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2937 nfs_fattr_init(info->fattr);
2938 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2941 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2942 struct nfs_fsinfo *info)
2944 struct nfs4_exception exception = { };
2947 err = _nfs4_lookup_root(server, fhandle, info);
2948 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
2951 case -NFS4ERR_WRONGSEC:
2954 err = nfs4_handle_exception(server, err, &exception);
2956 } while (exception.retry);
2961 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2962 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2964 struct rpc_auth_create_args auth_args = {
2965 .pseudoflavor = flavor,
2967 struct rpc_auth *auth;
2970 auth = rpcauth_create(&auth_args, server->client);
2975 ret = nfs4_lookup_root(server, fhandle, info);
2981 * Retry pseudoroot lookup with various security flavors. We do this when:
2983 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2984 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2986 * Returns zero on success, or a negative NFS4ERR value, or a
2987 * negative errno value.
2989 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2990 struct nfs_fsinfo *info)
2992 /* Per 3530bis 15.33.5 */
2993 static const rpc_authflavor_t flav_array[] = {
2997 RPC_AUTH_UNIX, /* courtesy */
3000 int status = -EPERM;
3003 if (server->auth_info.flavor_len > 0) {
3004 /* try each flavor specified by user */
3005 for (i = 0; i < server->auth_info.flavor_len; i++) {
3006 status = nfs4_lookup_root_sec(server, fhandle, info,
3007 server->auth_info.flavors[i]);
3008 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3013 /* no flavors specified by user, try default list */
3014 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3015 status = nfs4_lookup_root_sec(server, fhandle, info,
3017 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3024 * -EACCESS could mean that the user doesn't have correct permissions
3025 * to access the mount. It could also mean that we tried to mount
3026 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3027 * existing mount programs don't handle -EACCES very well so it should
3028 * be mapped to -EPERM instead.
3030 if (status == -EACCES)
3035 static int nfs4_do_find_root_sec(struct nfs_server *server,
3036 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3038 int mv = server->nfs_client->cl_minorversion;
3039 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3043 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3044 * @server: initialized nfs_server handle
3045 * @fhandle: we fill in the pseudo-fs root file handle
3046 * @info: we fill in an FSINFO struct
3047 * @auth_probe: probe the auth flavours
3049 * Returns zero on success, or a negative errno.
3051 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
3052 struct nfs_fsinfo *info,
3057 switch (auth_probe) {
3059 status = nfs4_lookup_root(server, fhandle, info);
3060 if (status != -NFS4ERR_WRONGSEC)
3063 status = nfs4_do_find_root_sec(server, fhandle, info);
3067 status = nfs4_server_capabilities(server, fhandle);
3069 status = nfs4_do_fsinfo(server, fhandle, info);
3071 return nfs4_map_errors(status);
3074 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3075 struct nfs_fsinfo *info)
3078 struct nfs_fattr *fattr = info->fattr;
3079 struct nfs4_label *label = NULL;
3081 error = nfs4_server_capabilities(server, mntfh);
3083 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3087 label = nfs4_label_alloc(server, GFP_KERNEL);
3089 return PTR_ERR(label);
3091 error = nfs4_proc_getattr(server, mntfh, fattr, label);
3093 dprintk("nfs4_get_root: getattr error = %d\n", -error);
3094 goto err_free_label;
3097 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3098 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3099 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3102 nfs4_label_free(label);
3108 * Get locations and (maybe) other attributes of a referral.
3109 * Note that we'll actually follow the referral later when
3110 * we detect fsid mismatch in inode revalidation
3112 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3113 const struct qstr *name, struct nfs_fattr *fattr,
3114 struct nfs_fh *fhandle)
3116 int status = -ENOMEM;
3117 struct page *page = NULL;
3118 struct nfs4_fs_locations *locations = NULL;
3120 page = alloc_page(GFP_KERNEL);
3123 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3124 if (locations == NULL)
3127 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
3132 * If the fsid didn't change, this is a migration event, not a
3133 * referral. Cause us to drop into the exception handler, which
3134 * will kick off migration recovery.
3136 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3137 dprintk("%s: server did not return a different fsid for"
3138 " a referral at %s\n", __func__, name->name);
3139 status = -NFS4ERR_MOVED;
3142 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3143 nfs_fixup_referral_attributes(&locations->fattr);
3145 /* replace the lookup nfs_fattr with the locations nfs_fattr */
3146 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
3147 memset(fhandle, 0, sizeof(struct nfs_fh));
3155 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3156 struct nfs_fattr *fattr, struct nfs4_label *label)
3158 struct nfs4_getattr_arg args = {
3160 .bitmask = server->attr_bitmask,
3162 struct nfs4_getattr_res res = {
3167 struct rpc_message msg = {
3168 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3173 args.bitmask = nfs4_bitmask(server, label);
3175 nfs_fattr_init(fattr);
3176 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
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_exception exception = { };
3185 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3186 trace_nfs4_getattr(server, fhandle, fattr, err);
3187 err = nfs4_handle_exception(server, err,
3189 } while (exception.retry);
3194 * The file is not closed if it is opened due to the a request to change
3195 * the size of the file. The open call will not be needed once the
3196 * VFS layer lookup-intents are implemented.
3198 * Close is called when the inode is destroyed.
3199 * If we haven't opened the file for O_WRONLY, we
3200 * need to in the size_change case to obtain a stateid.
3203 * Because OPEN is always done by name in nfsv4, it is
3204 * possible that we opened a different file by the same
3205 * name. We can recognize this race condition, but we
3206 * can't do anything about it besides returning an error.
3208 * This will be fixed with VFS changes (lookup-intent).
3211 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3212 struct iattr *sattr)
3214 struct inode *inode = dentry->d_inode;
3215 struct rpc_cred *cred = NULL;
3216 struct nfs4_state *state = NULL;
3217 struct nfs4_label *label = NULL;
3220 if (pnfs_ld_layoutret_on_setattr(inode))
3221 pnfs_commit_and_return_layout(inode);
3223 nfs_fattr_init(fattr);
3225 /* Deal with open(O_TRUNC) */
3226 if (sattr->ia_valid & ATTR_OPEN)
3227 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
3229 /* Optimization: if the end result is no change, don't RPC */
3230 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
3233 /* Search for an existing open(O_WRITE) file */
3234 if (sattr->ia_valid & ATTR_FILE) {
3235 struct nfs_open_context *ctx;
3237 ctx = nfs_file_open_context(sattr->ia_file);
3244 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3246 return PTR_ERR(label);
3248 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
3250 nfs_setattr_update_inode(inode, sattr);
3251 nfs_setsecurity(inode, fattr, label);
3253 nfs4_label_free(label);
3257 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3258 const struct qstr *name, struct nfs_fh *fhandle,
3259 struct nfs_fattr *fattr, struct nfs4_label *label)
3261 struct nfs_server *server = NFS_SERVER(dir);
3263 struct nfs4_lookup_arg args = {
3264 .bitmask = server->attr_bitmask,
3265 .dir_fh = NFS_FH(dir),
3268 struct nfs4_lookup_res res = {
3274 struct rpc_message msg = {
3275 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3280 args.bitmask = nfs4_bitmask(server, label);
3282 nfs_fattr_init(fattr);
3284 dprintk("NFS call lookup %s\n", name->name);
3285 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
3286 dprintk("NFS reply lookup: %d\n", status);
3290 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
3292 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
3293 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
3294 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3298 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3299 struct qstr *name, struct nfs_fh *fhandle,
3300 struct nfs_fattr *fattr, struct nfs4_label *label)
3302 struct nfs4_exception exception = { };
3303 struct rpc_clnt *client = *clnt;
3306 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
3307 trace_nfs4_lookup(dir, name, err);
3309 case -NFS4ERR_BADNAME:
3312 case -NFS4ERR_MOVED:
3313 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
3315 case -NFS4ERR_WRONGSEC:
3317 if (client != *clnt)
3319 client = nfs4_negotiate_security(client, dir, name);
3321 return PTR_ERR(client);
3323 exception.retry = 1;
3326 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3328 } while (exception.retry);
3333 else if (client != *clnt)
3334 rpc_shutdown_client(client);
3339 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
3340 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3341 struct nfs4_label *label)
3344 struct rpc_clnt *client = NFS_CLIENT(dir);
3346 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
3347 if (client != NFS_CLIENT(dir)) {
3348 rpc_shutdown_client(client);
3349 nfs_fixup_secinfo_attributes(fattr);
3355 nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3356 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3358 struct rpc_clnt *client = NFS_CLIENT(dir);
3361 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
3363 return ERR_PTR(status);
3364 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
3367 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3369 struct nfs_server *server = NFS_SERVER(inode);
3370 struct nfs4_accessargs args = {
3371 .fh = NFS_FH(inode),
3372 .bitmask = server->cache_consistency_bitmask,
3374 struct nfs4_accessres res = {
3377 struct rpc_message msg = {
3378 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3381 .rpc_cred = entry->cred,
3383 int mode = entry->mask;
3387 * Determine which access bits we want to ask for...
3389 if (mode & MAY_READ)
3390 args.access |= NFS4_ACCESS_READ;
3391 if (S_ISDIR(inode->i_mode)) {
3392 if (mode & MAY_WRITE)
3393 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3394 if (mode & MAY_EXEC)
3395 args.access |= NFS4_ACCESS_LOOKUP;
3397 if (mode & MAY_WRITE)
3398 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3399 if (mode & MAY_EXEC)
3400 args.access |= NFS4_ACCESS_EXECUTE;
3403 res.fattr = nfs_alloc_fattr();
3404 if (res.fattr == NULL)
3407 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3409 nfs_access_set_mask(entry, res.access);
3410 nfs_refresh_inode(inode, res.fattr);
3412 nfs_free_fattr(res.fattr);
3416 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3418 struct nfs4_exception exception = { };
3421 err = _nfs4_proc_access(inode, entry);
3422 trace_nfs4_access(inode, err);
3423 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3425 } while (exception.retry);
3430 * TODO: For the time being, we don't try to get any attributes
3431 * along with any of the zero-copy operations READ, READDIR,
3434 * In the case of the first three, we want to put the GETATTR
3435 * after the read-type operation -- this is because it is hard
3436 * to predict the length of a GETATTR response in v4, and thus
3437 * align the READ data correctly. This means that the GETATTR
3438 * may end up partially falling into the page cache, and we should
3439 * shift it into the 'tail' of the xdr_buf before processing.
3440 * To do this efficiently, we need to know the total length
3441 * of data received, which doesn't seem to be available outside
3444 * In the case of WRITE, we also want to put the GETATTR after
3445 * the operation -- in this case because we want to make sure
3446 * we get the post-operation mtime and size.
3448 * Both of these changes to the XDR layer would in fact be quite
3449 * minor, but I decided to leave them for a subsequent patch.
3451 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3452 unsigned int pgbase, unsigned int pglen)
3454 struct nfs4_readlink args = {
3455 .fh = NFS_FH(inode),
3460 struct nfs4_readlink_res res;
3461 struct rpc_message msg = {
3462 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3467 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
3470 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3471 unsigned int pgbase, unsigned int pglen)
3473 struct nfs4_exception exception = { };
3476 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3477 trace_nfs4_readlink(inode, err);
3478 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3480 } while (exception.retry);
3485 * This is just for mknod. open(O_CREAT) will always do ->open_context().
3488 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
3491 struct nfs4_label l, *ilabel = NULL;
3492 struct nfs_open_context *ctx;
3493 struct nfs4_state *state;
3497 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3499 return PTR_ERR(ctx);
3501 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3503 sattr->ia_mode &= ~current_umask();
3504 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
3505 if (IS_ERR(state)) {
3506 status = PTR_ERR(state);
3510 nfs4_label_release_security(ilabel);
3511 put_nfs_open_context(ctx);
3515 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3517 struct nfs_server *server = NFS_SERVER(dir);
3518 struct nfs_removeargs args = {
3522 struct nfs_removeres res = {
3525 struct rpc_message msg = {
3526 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3532 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
3534 update_changeattr(dir, &res.cinfo);
3538 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3540 struct nfs4_exception exception = { };
3543 err = _nfs4_proc_remove(dir, name);
3544 trace_nfs4_remove(dir, name, err);
3545 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3547 } while (exception.retry);
3551 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
3553 struct nfs_server *server = NFS_SERVER(dir);
3554 struct nfs_removeargs *args = msg->rpc_argp;
3555 struct nfs_removeres *res = msg->rpc_resp;
3557 res->server = server;
3558 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
3559 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
3561 nfs_fattr_init(res->dir_attr);
3564 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3566 nfs4_setup_sequence(NFS_SERVER(data->dir),
3567 &data->args.seq_args,
3572 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
3574 struct nfs_unlinkdata *data = task->tk_calldata;
3575 struct nfs_removeres *res = &data->res;
3577 if (!nfs4_sequence_done(task, &res->seq_res))
3579 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3581 update_changeattr(dir, &res->cinfo);
3585 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3587 struct nfs_server *server = NFS_SERVER(dir);
3588 struct nfs_renameargs *arg = msg->rpc_argp;
3589 struct nfs_renameres *res = msg->rpc_resp;
3591 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
3592 res->server = server;
3593 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
3596 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3598 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3599 &data->args.seq_args,
3604 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3605 struct inode *new_dir)
3607 struct nfs_renamedata *data = task->tk_calldata;
3608 struct nfs_renameres *res = &data->res;
3610 if (!nfs4_sequence_done(task, &res->seq_res))
3612 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3615 update_changeattr(old_dir, &res->old_cinfo);
3616 update_changeattr(new_dir, &res->new_cinfo);
3620 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3622 struct nfs_server *server = NFS_SERVER(inode);
3623 struct nfs4_link_arg arg = {
3624 .fh = NFS_FH(inode),
3625 .dir_fh = NFS_FH(dir),
3627 .bitmask = server->attr_bitmask,
3629 struct nfs4_link_res res = {
3633 struct rpc_message msg = {
3634 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3638 int status = -ENOMEM;
3640 res.fattr = nfs_alloc_fattr();
3641 if (res.fattr == NULL)
3644 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3645 if (IS_ERR(res.label)) {
3646 status = PTR_ERR(res.label);
3649 arg.bitmask = nfs4_bitmask(server, res.label);
3651 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3653 update_changeattr(dir, &res.cinfo);
3654 status = nfs_post_op_update_inode(inode, res.fattr);
3656 nfs_setsecurity(inode, res.fattr, res.label);
3660 nfs4_label_free(res.label);
3663 nfs_free_fattr(res.fattr);
3667 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3669 struct nfs4_exception exception = { };
3672 err = nfs4_handle_exception(NFS_SERVER(inode),
3673 _nfs4_proc_link(inode, dir, name),
3675 } while (exception.retry);
3679 struct nfs4_createdata {
3680 struct rpc_message msg;
3681 struct nfs4_create_arg arg;
3682 struct nfs4_create_res res;
3684 struct nfs_fattr fattr;
3685 struct nfs4_label *label;
3688 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3689 struct qstr *name, struct iattr *sattr, u32 ftype)
3691 struct nfs4_createdata *data;
3693 data = kzalloc(sizeof(*data), GFP_KERNEL);
3695 struct nfs_server *server = NFS_SERVER(dir);
3697 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3698 if (IS_ERR(data->label))
3701 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3702 data->msg.rpc_argp = &data->arg;
3703 data->msg.rpc_resp = &data->res;
3704 data->arg.dir_fh = NFS_FH(dir);
3705 data->arg.server = server;
3706 data->arg.name = name;
3707 data->arg.attrs = sattr;
3708 data->arg.ftype = ftype;
3709 data->arg.bitmask = nfs4_bitmask(server, data->label);
3710 data->res.server = server;
3711 data->res.fh = &data->fh;
3712 data->res.fattr = &data->fattr;
3713 data->res.label = data->label;
3714 nfs_fattr_init(data->res.fattr);
3722 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3724 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3725 &data->arg.seq_args, &data->res.seq_res, 1);
3727 update_changeattr(dir, &data->res.dir_cinfo);
3728 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
3733 static void nfs4_free_createdata(struct nfs4_createdata *data)
3735 nfs4_label_free(data->label);
3739 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3740 struct page *page, unsigned int len, struct iattr *sattr,
3741 struct nfs4_label *label)
3743 struct nfs4_createdata *data;
3744 int status = -ENAMETOOLONG;
3746 if (len > NFS4_MAXPATHLEN)
3750 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3754 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3755 data->arg.u.symlink.pages = &page;
3756 data->arg.u.symlink.len = len;
3757 data->arg.label = label;
3759 status = nfs4_do_create(dir, dentry, data);
3761 nfs4_free_createdata(data);
3766 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3767 struct page *page, unsigned int len, struct iattr *sattr)
3769 struct nfs4_exception exception = { };
3770 struct nfs4_label l, *label = NULL;
3773 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3776 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3777 trace_nfs4_symlink(dir, &dentry->d_name, err);
3778 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3780 } while (exception.retry);
3782 nfs4_label_release_security(label);
3786 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3787 struct iattr *sattr, struct nfs4_label *label)
3789 struct nfs4_createdata *data;
3790 int status = -ENOMEM;
3792 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3796 data->arg.label = label;
3797 status = nfs4_do_create(dir, dentry, data);
3799 nfs4_free_createdata(data);
3804 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3805 struct iattr *sattr)
3807 struct nfs4_exception exception = { };
3808 struct nfs4_label l, *label = NULL;
3811 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3813 sattr->ia_mode &= ~current_umask();
3815 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3816 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3817 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3819 } while (exception.retry);
3820 nfs4_label_release_security(label);
3825 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3826 u64 cookie, struct page **pages, unsigned int count, int plus)
3828 struct inode *dir = dentry->d_inode;
3829 struct nfs4_readdir_arg args = {
3834 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3837 struct nfs4_readdir_res res;
3838 struct rpc_message msg = {
3839 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3846 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3848 (unsigned long long)cookie);
3849 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
3850 res.pgbase = args.pgbase;
3851 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3853 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
3854 status += args.pgbase;
3857 nfs_invalidate_atime(dir);
3859 dprintk("%s: returns %d\n", __func__, status);
3863 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3864 u64 cookie, struct page **pages, unsigned int count, int plus)
3866 struct nfs4_exception exception = { };
3869 err = _nfs4_proc_readdir(dentry, cred, cookie,
3870 pages, count, plus);
3871 trace_nfs4_readdir(dentry->d_inode, err);
3872 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
3874 } while (exception.retry);
3878 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3879 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
3881 struct nfs4_createdata *data;
3882 int mode = sattr->ia_mode;
3883 int status = -ENOMEM;
3885 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3890 data->arg.ftype = NF4FIFO;
3891 else if (S_ISBLK(mode)) {
3892 data->arg.ftype = NF4BLK;
3893 data->arg.u.device.specdata1 = MAJOR(rdev);
3894 data->arg.u.device.specdata2 = MINOR(rdev);
3896 else if (S_ISCHR(mode)) {
3897 data->arg.ftype = NF4CHR;
3898 data->arg.u.device.specdata1 = MAJOR(rdev);
3899 data->arg.u.device.specdata2 = MINOR(rdev);
3900 } else if (!S_ISSOCK(mode)) {
3905 data->arg.label = label;
3906 status = nfs4_do_create(dir, dentry, data);
3908 nfs4_free_createdata(data);
3913 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3914 struct iattr *sattr, dev_t rdev)
3916 struct nfs4_exception exception = { };
3917 struct nfs4_label l, *label = NULL;
3920 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3922 sattr->ia_mode &= ~current_umask();
3924 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3925 trace_nfs4_mknod(dir, &dentry->d_name, err);
3926 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3928 } while (exception.retry);
3930 nfs4_label_release_security(label);
3935 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3936 struct nfs_fsstat *fsstat)
3938 struct nfs4_statfs_arg args = {
3940 .bitmask = server->attr_bitmask,
3942 struct nfs4_statfs_res res = {
3945 struct rpc_message msg = {
3946 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3951 nfs_fattr_init(fsstat->fattr);
3952 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3955 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3957 struct nfs4_exception exception = { };
3960 err = nfs4_handle_exception(server,
3961 _nfs4_proc_statfs(server, fhandle, fsstat),
3963 } while (exception.retry);
3967 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3968 struct nfs_fsinfo *fsinfo)
3970 struct nfs4_fsinfo_arg args = {
3972 .bitmask = server->attr_bitmask,
3974 struct nfs4_fsinfo_res res = {
3977 struct rpc_message msg = {
3978 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3983 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3986 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3988 struct nfs4_exception exception = { };
3989 unsigned long now = jiffies;
3993 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
3994 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
3996 struct nfs_client *clp = server->nfs_client;
3998 spin_lock(&clp->cl_lock);
3999 clp->cl_lease_time = fsinfo->lease_time * HZ;
4000 clp->cl_last_renewal = now;
4001 spin_unlock(&clp->cl_lock);
4004 err = nfs4_handle_exception(server, err, &exception);
4005 } while (exception.retry);
4009 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4013 nfs_fattr_init(fsinfo->fattr);
4014 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
4016 /* block layout checks this! */
4017 server->pnfs_blksize = fsinfo->blksize;
4018 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
4024 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4025 struct nfs_pathconf *pathconf)
4027 struct nfs4_pathconf_arg args = {
4029 .bitmask = server->attr_bitmask,
4031 struct nfs4_pathconf_res res = {
4032 .pathconf = pathconf,
4034 struct rpc_message msg = {
4035 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4040 /* None of the pathconf attributes are mandatory to implement */
4041 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4042 memset(pathconf, 0, sizeof(*pathconf));
4046 nfs_fattr_init(pathconf->fattr);
4047 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4050 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4051 struct nfs_pathconf *pathconf)
4053 struct nfs4_exception exception = { };
4057 err = nfs4_handle_exception(server,
4058 _nfs4_proc_pathconf(server, fhandle, pathconf),
4060 } while (exception.retry);
4064 int nfs4_set_rw_stateid(nfs4_stateid *stateid,
4065 const struct nfs_open_context *ctx,
4066 const struct nfs_lock_context *l_ctx,
4069 const struct nfs_lockowner *lockowner = NULL;
4072 lockowner = &l_ctx->lockowner;
4073 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
4075 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4077 static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4078 const struct nfs_open_context *ctx,
4079 const struct nfs_lock_context *l_ctx,
4082 nfs4_stateid current_stateid;
4084 /* If the current stateid represents a lost lock, then exit */
4085 if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode) == -EIO)
4087 return nfs4_stateid_match(stateid, ¤t_stateid);
4090 static bool nfs4_error_stateid_expired(int err)
4093 case -NFS4ERR_DELEG_REVOKED:
4094 case -NFS4ERR_ADMIN_REVOKED:
4095 case -NFS4ERR_BAD_STATEID:
4096 case -NFS4ERR_STALE_STATEID:
4097 case -NFS4ERR_OLD_STATEID:
4098 case -NFS4ERR_OPENMODE:
4099 case -NFS4ERR_EXPIRED:
4105 void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
4107 nfs_invalidate_atime(hdr->inode);
4110 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
4112 struct nfs_server *server = NFS_SERVER(hdr->inode);
4114 trace_nfs4_read(hdr, task->tk_status);
4115 if (nfs4_async_handle_error(task, server,
4116 hdr->args.context->state) == -EAGAIN) {
4117 rpc_restart_call_prepare(task);
4121 __nfs4_read_done_cb(hdr);
4122 if (task->tk_status > 0)
4123 renew_lease(server, hdr->timestamp);
4127 static bool nfs4_read_stateid_changed(struct rpc_task *task,
4128 struct nfs_pgio_args *args)
4131 if (!nfs4_error_stateid_expired(task->tk_status) ||
4132 nfs4_stateid_is_current(&args->stateid,
4137 rpc_restart_call_prepare(task);
4141 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4144 dprintk("--> %s\n", __func__);
4146 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4148 if (nfs4_read_stateid_changed(task, &hdr->args))
4150 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4151 nfs4_read_done_cb(task, hdr);
4154 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4155 struct rpc_message *msg)
4157 hdr->timestamp = jiffies;
4158 hdr->pgio_done_cb = nfs4_read_done_cb;
4159 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
4160 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
4163 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4164 struct nfs_pgio_header *hdr)
4166 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4167 &hdr->args.seq_args,
4171 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4172 hdr->args.lock_context,
4173 hdr->rw_ops->rw_mode) == -EIO)
4175 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
4180 static int nfs4_write_done_cb(struct rpc_task *task,
4181 struct nfs_pgio_header *hdr)
4183 struct inode *inode = hdr->inode;
4185 trace_nfs4_write(hdr, task->tk_status);
4186 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4187 hdr->args.context->state) == -EAGAIN) {
4188 rpc_restart_call_prepare(task);
4191 if (task->tk_status >= 0) {
4192 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4193 nfs_post_op_update_inode_force_wcc(inode, &hdr->fattr);
4198 static bool nfs4_write_stateid_changed(struct rpc_task *task,
4199 struct nfs_pgio_args *args)
4202 if (!nfs4_error_stateid_expired(task->tk_status) ||
4203 nfs4_stateid_is_current(&args->stateid,
4208 rpc_restart_call_prepare(task);
4212 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4214 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4216 if (nfs4_write_stateid_changed(task, &hdr->args))
4218 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4219 nfs4_write_done_cb(task, hdr);
4223 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
4225 /* Don't request attributes for pNFS or O_DIRECT writes */
4226 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
4228 /* Otherwise, request attributes if and only if we don't hold
4231 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
4234 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4235 struct rpc_message *msg)
4237 struct nfs_server *server = NFS_SERVER(hdr->inode);
4239 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4240 hdr->args.bitmask = NULL;
4241 hdr->res.fattr = NULL;
4243 hdr->args.bitmask = server->cache_consistency_bitmask;
4245 if (!hdr->pgio_done_cb)
4246 hdr->pgio_done_cb = nfs4_write_done_cb;
4247 hdr->res.server = server;
4248 hdr->timestamp = jiffies;
4250 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
4251 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
4254 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
4256 nfs4_setup_sequence(NFS_SERVER(data->inode),
4257 &data->args.seq_args,
4262 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
4264 struct inode *inode = data->inode;
4266 trace_nfs4_commit(data, task->tk_status);
4267 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
4268 rpc_restart_call_prepare(task);
4274 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
4276 if (!nfs4_sequence_done(task, &data->res.seq_res))
4278 return data->commit_done_cb(task, data);
4281 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
4283 struct nfs_server *server = NFS_SERVER(data->inode);
4285 if (data->commit_done_cb == NULL)
4286 data->commit_done_cb = nfs4_commit_done_cb;
4287 data->res.server = server;
4288 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
4289 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4292 struct nfs4_renewdata {
4293 struct nfs_client *client;
4294 unsigned long timestamp;
4298 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4299 * standalone procedure for queueing an asynchronous RENEW.
4301 static void nfs4_renew_release(void *calldata)
4303 struct nfs4_renewdata *data = calldata;
4304 struct nfs_client *clp = data->client;
4306 if (atomic_read(&clp->cl_count) > 1)
4307 nfs4_schedule_state_renewal(clp);
4308 nfs_put_client(clp);
4312 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
4314 struct nfs4_renewdata *data = calldata;
4315 struct nfs_client *clp = data->client;
4316 unsigned long timestamp = data->timestamp;
4318 trace_nfs4_renew_async(clp, task->tk_status);
4319 switch (task->tk_status) {
4322 case -NFS4ERR_LEASE_MOVED:
4323 nfs4_schedule_lease_moved_recovery(clp);
4326 /* Unless we're shutting down, schedule state recovery! */
4327 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4329 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
4330 nfs4_schedule_lease_recovery(clp);
4333 nfs4_schedule_path_down_recovery(clp);
4335 do_renew_lease(clp, timestamp);
4338 static const struct rpc_call_ops nfs4_renew_ops = {
4339 .rpc_call_done = nfs4_renew_done,
4340 .rpc_release = nfs4_renew_release,
4343 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
4345 struct rpc_message msg = {
4346 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4350 struct nfs4_renewdata *data;
4352 if (renew_flags == 0)
4354 if (!atomic_inc_not_zero(&clp->cl_count))
4356 data = kmalloc(sizeof(*data), GFP_NOFS);
4360 data->timestamp = jiffies;
4361 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
4362 &nfs4_renew_ops, data);
4365 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
4367 struct rpc_message msg = {
4368 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4372 unsigned long now = jiffies;
4375 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4378 do_renew_lease(clp, now);
4382 static inline int nfs4_server_supports_acls(struct nfs_server *server)
4384 return server->caps & NFS_CAP_ACLS;
4387 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4388 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
4391 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
4393 static int buf_to_pages_noslab(const void *buf, size_t buflen,
4394 struct page **pages, unsigned int *pgbase)
4396 struct page *newpage, **spages;
4402 len = min_t(size_t, PAGE_SIZE, buflen);
4403 newpage = alloc_page(GFP_KERNEL);
4405 if (newpage == NULL)
4407 memcpy(page_address(newpage), buf, len);
4412 } while (buflen != 0);
4418 __free_page(spages[rc-1]);
4422 struct nfs4_cached_acl {
4428 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4430 struct nfs_inode *nfsi = NFS_I(inode);
4432 spin_lock(&inode->i_lock);
4433 kfree(nfsi->nfs4_acl);
4434 nfsi->nfs4_acl = acl;
4435 spin_unlock(&inode->i_lock);
4438 static void nfs4_zap_acl_attr(struct inode *inode)
4440 nfs4_set_cached_acl(inode, NULL);
4443 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4445 struct nfs_inode *nfsi = NFS_I(inode);
4446 struct nfs4_cached_acl *acl;
4449 spin_lock(&inode->i_lock);
4450 acl = nfsi->nfs4_acl;
4453 if (buf == NULL) /* user is just asking for length */
4455 if (acl->cached == 0)
4457 ret = -ERANGE; /* see getxattr(2) man page */
4458 if (acl->len > buflen)
4460 memcpy(buf, acl->data, acl->len);
4464 spin_unlock(&inode->i_lock);
4468 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
4470 struct nfs4_cached_acl *acl;
4471 size_t buflen = sizeof(*acl) + acl_len;
4473 if (buflen <= PAGE_SIZE) {
4474 acl = kmalloc(buflen, GFP_KERNEL);
4478 _copy_from_pages(acl->data, pages, pgbase, acl_len);
4480 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4487 nfs4_set_cached_acl(inode, acl);
4491 * The getxattr API returns the required buffer length when called with a
4492 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4493 * the required buf. On a NULL buf, we send a page of data to the server
4494 * guessing that the ACL request can be serviced by a page. If so, we cache
4495 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4496 * the cache. If not so, we throw away the page, and cache the required
4497 * length. The next getxattr call will then produce another round trip to
4498 * the server, this time with the input buf of the required size.
4500 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4502 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
4503 struct nfs_getaclargs args = {
4504 .fh = NFS_FH(inode),
4508 struct nfs_getaclres res = {
4511 struct rpc_message msg = {
4512 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4516 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4517 int ret = -ENOMEM, i;
4519 /* As long as we're doing a round trip to the server anyway,
4520 * let's be prepared for a page of acl data. */
4523 if (npages > ARRAY_SIZE(pages))
4526 for (i = 0; i < npages; i++) {
4527 pages[i] = alloc_page(GFP_KERNEL);
4532 /* for decoding across pages */
4533 res.acl_scratch = alloc_page(GFP_KERNEL);
4534 if (!res.acl_scratch)
4537 args.acl_len = npages * PAGE_SIZE;
4538 args.acl_pgbase = 0;
4540 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
4541 __func__, buf, buflen, npages, args.acl_len);
4542 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4543 &msg, &args.seq_args, &res.seq_res, 0);
4547 /* Handle the case where the passed-in buffer is too short */
4548 if (res.acl_flags & NFS4_ACL_TRUNC) {
4549 /* Did the user only issue a request for the acl length? */
4555 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
4557 if (res.acl_len > buflen) {
4561 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
4566 for (i = 0; i < npages; i++)
4568 __free_page(pages[i]);
4569 if (res.acl_scratch)
4570 __free_page(res.acl_scratch);
4574 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4576 struct nfs4_exception exception = { };
4579 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4580 trace_nfs4_get_acl(inode, ret);
4583 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4584 } while (exception.retry);
4588 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4590 struct nfs_server *server = NFS_SERVER(inode);
4593 if (!nfs4_server_supports_acls(server))
4595 ret = nfs_revalidate_inode(server, inode);
4598 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4599 nfs_zap_acl_cache(inode);
4600 ret = nfs4_read_cached_acl(inode, buf, buflen);
4602 /* -ENOENT is returned if there is no ACL or if there is an ACL
4603 * but no cached acl data, just the acl length */
4605 return nfs4_get_acl_uncached(inode, buf, buflen);
4608 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4610 struct nfs_server *server = NFS_SERVER(inode);
4611 struct page *pages[NFS4ACL_MAXPAGES];
4612 struct nfs_setaclargs arg = {
4613 .fh = NFS_FH(inode),
4617 struct nfs_setaclres res;
4618 struct rpc_message msg = {
4619 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4623 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4626 if (!nfs4_server_supports_acls(server))
4628 if (npages > ARRAY_SIZE(pages))
4630 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4633 nfs4_inode_return_delegation(inode);
4634 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4637 * Free each page after tx, so the only ref left is
4638 * held by the network stack
4641 put_page(pages[i-1]);
4644 * Acl update can result in inode attribute update.
4645 * so mark the attribute cache invalid.
4647 spin_lock(&inode->i_lock);
4648 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4649 spin_unlock(&inode->i_lock);
4650 nfs_access_zap_cache(inode);
4651 nfs_zap_acl_cache(inode);
4655 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4657 struct nfs4_exception exception = { };
4660 err = __nfs4_proc_set_acl(inode, buf, buflen);
4661 trace_nfs4_set_acl(inode, err);
4662 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4664 } while (exception.retry);
4668 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
4669 static int _nfs4_get_security_label(struct inode *inode, void *buf,
4672 struct nfs_server *server = NFS_SERVER(inode);
4673 struct nfs_fattr fattr;
4674 struct nfs4_label label = {0, 0, buflen, buf};
4676 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4677 struct nfs4_getattr_arg arg = {
4678 .fh = NFS_FH(inode),
4681 struct nfs4_getattr_res res = {
4686 struct rpc_message msg = {
4687 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4693 nfs_fattr_init(&fattr);
4695 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
4698 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4700 if (buflen < label.len)
4705 static int nfs4_get_security_label(struct inode *inode, void *buf,
4708 struct nfs4_exception exception = { };
4711 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4715 err = _nfs4_get_security_label(inode, buf, buflen);
4716 trace_nfs4_get_security_label(inode, err);
4717 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4719 } while (exception.retry);
4723 static int _nfs4_do_set_security_label(struct inode *inode,
4724 struct nfs4_label *ilabel,
4725 struct nfs_fattr *fattr,
4726 struct nfs4_label *olabel)
4729 struct iattr sattr = {0};
4730 struct nfs_server *server = NFS_SERVER(inode);
4731 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4732 struct nfs_setattrargs arg = {
4733 .fh = NFS_FH(inode),
4739 struct nfs_setattrres res = {
4744 struct rpc_message msg = {
4745 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
4751 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
4753 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4755 dprintk("%s failed: %d\n", __func__, status);
4760 static int nfs4_do_set_security_label(struct inode *inode,
4761 struct nfs4_label *ilabel,
4762 struct nfs_fattr *fattr,
4763 struct nfs4_label *olabel)
4765 struct nfs4_exception exception = { };
4769 err = _nfs4_do_set_security_label(inode, ilabel,
4771 trace_nfs4_set_security_label(inode, err);
4772 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4774 } while (exception.retry);
4779 nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4781 struct nfs4_label ilabel, *olabel = NULL;
4782 struct nfs_fattr fattr;
4783 struct rpc_cred *cred;
4784 struct inode *inode = dentry->d_inode;
4787 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4790 nfs_fattr_init(&fattr);
4794 ilabel.label = (char *)buf;
4795 ilabel.len = buflen;
4797 cred = rpc_lookup_cred();
4799 return PTR_ERR(cred);
4801 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4802 if (IS_ERR(olabel)) {
4803 status = -PTR_ERR(olabel);
4807 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4809 nfs_setsecurity(inode, &fattr, olabel);
4811 nfs4_label_free(olabel);
4816 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4820 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
4822 struct nfs_client *clp = server->nfs_client;
4824 if (task->tk_status >= 0)
4826 switch(task->tk_status) {
4827 case -NFS4ERR_DELEG_REVOKED:
4828 case -NFS4ERR_ADMIN_REVOKED:
4829 case -NFS4ERR_BAD_STATEID:
4832 nfs_remove_bad_delegation(state->inode);
4833 case -NFS4ERR_OPENMODE:
4836 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4837 goto recovery_failed;
4838 goto wait_on_recovery;
4839 case -NFS4ERR_EXPIRED:
4840 if (state != NULL) {
4841 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4842 goto recovery_failed;
4844 case -NFS4ERR_STALE_STATEID:
4845 case -NFS4ERR_STALE_CLIENTID:
4846 nfs4_schedule_lease_recovery(clp);
4847 goto wait_on_recovery;
4848 case -NFS4ERR_MOVED:
4849 if (nfs4_schedule_migration_recovery(server) < 0)
4850 goto recovery_failed;
4851 goto wait_on_recovery;
4852 case -NFS4ERR_LEASE_MOVED:
4853 nfs4_schedule_lease_moved_recovery(clp);
4854 goto wait_on_recovery;
4855 #if defined(CONFIG_NFS_V4_1)
4856 case -NFS4ERR_BADSESSION:
4857 case -NFS4ERR_BADSLOT:
4858 case -NFS4ERR_BAD_HIGH_SLOT:
4859 case -NFS4ERR_DEADSESSION:
4860 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4861 case -NFS4ERR_SEQ_FALSE_RETRY:
4862 case -NFS4ERR_SEQ_MISORDERED:
4863 dprintk("%s ERROR %d, Reset session\n", __func__,
4865 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4866 goto wait_on_recovery;
4867 #endif /* CONFIG_NFS_V4_1 */
4868 case -NFS4ERR_DELAY:
4869 nfs_inc_server_stats(server, NFSIOS_DELAY);
4870 case -NFS4ERR_GRACE:
4871 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4872 case -NFS4ERR_RETRY_UNCACHED_REP:
4873 case -NFS4ERR_OLD_STATEID:
4876 task->tk_status = nfs4_map_errors(task->tk_status);
4879 task->tk_status = -EIO;
4882 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
4883 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4884 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4885 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4886 goto recovery_failed;
4888 task->tk_status = 0;
4892 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4893 nfs4_verifier *bootverf)
4897 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4898 /* An impossible timestamp guarantees this value
4899 * will never match a generated boot time. */
4901 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
4903 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4904 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4905 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
4907 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4911 nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4912 char *buf, size_t len)
4914 unsigned int result;
4917 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4919 rpc_peeraddr2str(clp->cl_rpcclient,
4921 rpc_peeraddr2str(clp->cl_rpcclient,
4922 RPC_DISPLAY_PROTO));
4928 nfs4_init_uniform_client_string(const struct nfs_client *clp,
4929 char *buf, size_t len)
4931 const char *nodename = clp->cl_rpcclient->cl_nodename;
4933 if (nfs4_client_id_uniquifier[0] != '\0')
4934 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4935 clp->rpc_ops->version,
4936 clp->cl_minorversion,
4937 nfs4_client_id_uniquifier,
4939 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4940 clp->rpc_ops->version, clp->cl_minorversion,
4945 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
4946 * services. Advertise one based on the address family of the
4950 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
4952 if (strchr(clp->cl_ipaddr, ':') != NULL)
4953 return scnprintf(buf, len, "tcp6");
4955 return scnprintf(buf, len, "tcp");
4958 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
4960 struct nfs4_setclientid *sc = calldata;
4962 if (task->tk_status == 0)
4963 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
4966 static const struct rpc_call_ops nfs4_setclientid_ops = {
4967 .rpc_call_done = nfs4_setclientid_done,
4971 * nfs4_proc_setclientid - Negotiate client ID
4972 * @clp: state data structure
4973 * @program: RPC program for NFSv4 callback service
4974 * @port: IP port number for NFS4 callback service
4975 * @cred: RPC credential to use for this call
4976 * @res: where to place the result
4978 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4980 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4981 unsigned short port, struct rpc_cred *cred,
4982 struct nfs4_setclientid_res *res)
4984 nfs4_verifier sc_verifier;
4985 struct nfs4_setclientid setclientid = {
4986 .sc_verifier = &sc_verifier,
4988 .sc_cb_ident = clp->cl_cb_ident,
4990 struct rpc_message msg = {
4991 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4992 .rpc_argp = &setclientid,
4996 struct rpc_task *task;
4997 struct rpc_task_setup task_setup_data = {
4998 .rpc_client = clp->cl_rpcclient,
4999 .rpc_message = &msg,
5000 .callback_ops = &nfs4_setclientid_ops,
5001 .callback_data = &setclientid,
5002 .flags = RPC_TASK_TIMEOUT,
5006 /* nfs_client_id4 */
5007 nfs4_init_boot_verifier(clp, &sc_verifier);
5008 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5009 setclientid.sc_name_len =
5010 nfs4_init_uniform_client_string(clp,
5011 setclientid.sc_name,
5012 sizeof(setclientid.sc_name));
5014 setclientid.sc_name_len =
5015 nfs4_init_nonuniform_client_string(clp,
5016 setclientid.sc_name,
5017 sizeof(setclientid.sc_name));
5019 setclientid.sc_netid_len =
5020 nfs4_init_callback_netid(clp,
5021 setclientid.sc_netid,
5022 sizeof(setclientid.sc_netid));
5023 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
5024 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
5025 clp->cl_ipaddr, port >> 8, port & 255);
5027 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
5028 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5029 setclientid.sc_name_len, setclientid.sc_name);
5030 task = rpc_run_task(&task_setup_data);
5032 status = PTR_ERR(task);
5035 status = task->tk_status;
5036 if (setclientid.sc_cred) {
5037 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5038 put_rpccred(setclientid.sc_cred);
5042 trace_nfs4_setclientid(clp, status);
5043 dprintk("NFS reply setclientid: %d\n", status);
5048 * nfs4_proc_setclientid_confirm - Confirm client ID
5049 * @clp: state data structure
5050 * @res: result of a previous SETCLIENTID
5051 * @cred: RPC credential to use for this call
5053 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5055 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
5056 struct nfs4_setclientid_res *arg,
5057 struct rpc_cred *cred)
5059 struct rpc_message msg = {
5060 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
5066 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5067 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5069 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5070 trace_nfs4_setclientid_confirm(clp, status);
5071 dprintk("NFS reply setclientid_confirm: %d\n", status);
5075 struct nfs4_delegreturndata {
5076 struct nfs4_delegreturnargs args;
5077 struct nfs4_delegreturnres res;
5079 nfs4_stateid stateid;
5080 unsigned long timestamp;
5081 struct nfs_fattr fattr;
5083 struct inode *inode;
5088 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5090 struct nfs4_delegreturndata *data = calldata;
5092 if (!nfs4_sequence_done(task, &data->res.seq_res))
5095 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
5096 switch (task->tk_status) {
5098 renew_lease(data->res.server, data->timestamp);
5099 case -NFS4ERR_ADMIN_REVOKED:
5100 case -NFS4ERR_DELEG_REVOKED:
5101 case -NFS4ERR_BAD_STATEID:
5102 case -NFS4ERR_OLD_STATEID:
5103 case -NFS4ERR_STALE_STATEID:
5104 case -NFS4ERR_EXPIRED:
5105 task->tk_status = 0;
5107 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
5110 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
5112 rpc_restart_call_prepare(task);
5116 data->rpc_status = task->tk_status;
5119 static void nfs4_delegreturn_release(void *calldata)
5121 struct nfs4_delegreturndata *data = calldata;
5124 pnfs_roc_release(data->inode);
5128 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5130 struct nfs4_delegreturndata *d_data;
5132 d_data = (struct nfs4_delegreturndata *)data;
5135 pnfs_roc_drain(d_data->inode, &d_data->roc_barrier, task))
5138 nfs4_setup_sequence(d_data->res.server,
5139 &d_data->args.seq_args,
5140 &d_data->res.seq_res,
5144 static const struct rpc_call_ops nfs4_delegreturn_ops = {
5145 .rpc_call_prepare = nfs4_delegreturn_prepare,
5146 .rpc_call_done = nfs4_delegreturn_done,
5147 .rpc_release = nfs4_delegreturn_release,
5150 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5152 struct nfs4_delegreturndata *data;
5153 struct nfs_server *server = NFS_SERVER(inode);
5154 struct rpc_task *task;
5155 struct rpc_message msg = {
5156 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5159 struct rpc_task_setup task_setup_data = {
5160 .rpc_client = server->client,
5161 .rpc_message = &msg,
5162 .callback_ops = &nfs4_delegreturn_ops,
5163 .flags = RPC_TASK_ASYNC,
5167 data = kzalloc(sizeof(*data), GFP_NOFS);
5170 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
5171 data->args.fhandle = &data->fh;
5172 data->args.stateid = &data->stateid;
5173 data->args.bitmask = server->cache_consistency_bitmask;
5174 nfs_copy_fh(&data->fh, NFS_FH(inode));
5175 nfs4_stateid_copy(&data->stateid, stateid);
5176 data->res.fattr = &data->fattr;
5177 data->res.server = server;
5178 nfs_fattr_init(data->res.fattr);
5179 data->timestamp = jiffies;
5180 data->rpc_status = 0;
5181 data->inode = inode;
5182 data->roc = list_empty(&NFS_I(inode)->open_files) ?
5183 pnfs_roc(inode) : false;
5185 task_setup_data.callback_data = data;
5186 msg.rpc_argp = &data->args;
5187 msg.rpc_resp = &data->res;
5188 task = rpc_run_task(&task_setup_data);
5190 return PTR_ERR(task);
5193 status = nfs4_wait_for_completion_rpc_task(task);
5196 status = data->rpc_status;
5198 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5200 nfs_refresh_inode(inode, &data->fattr);
5206 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5208 struct nfs_server *server = NFS_SERVER(inode);
5209 struct nfs4_exception exception = { };
5212 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
5213 trace_nfs4_delegreturn(inode, err);
5215 case -NFS4ERR_STALE_STATEID:
5216 case -NFS4ERR_EXPIRED:
5220 err = nfs4_handle_exception(server, err, &exception);
5221 } while (exception.retry);
5225 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5226 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5229 * sleep, with exponential backoff, and retry the LOCK operation.
5231 static unsigned long
5232 nfs4_set_lock_task_retry(unsigned long timeout)
5234 freezable_schedule_timeout_killable_unsafe(timeout);
5236 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5237 return NFS4_LOCK_MAXTIMEOUT;
5241 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5243 struct inode *inode = state->inode;
5244 struct nfs_server *server = NFS_SERVER(inode);
5245 struct nfs_client *clp = server->nfs_client;
5246 struct nfs_lockt_args arg = {
5247 .fh = NFS_FH(inode),
5250 struct nfs_lockt_res res = {
5253 struct rpc_message msg = {
5254 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5257 .rpc_cred = state->owner->so_cred,
5259 struct nfs4_lock_state *lsp;
5262 arg.lock_owner.clientid = clp->cl_clientid;
5263 status = nfs4_set_lock_state(state, request);
5266 lsp = request->fl_u.nfs4_fl.owner;
5267 arg.lock_owner.id = lsp->ls_seqid.owner_id;
5268 arg.lock_owner.s_dev = server->s_dev;
5269 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5272 request->fl_type = F_UNLCK;
5274 case -NFS4ERR_DENIED:
5277 request->fl_ops->fl_release_private(request);
5278 request->fl_ops = NULL;
5283 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5285 struct nfs4_exception exception = { };
5289 err = _nfs4_proc_getlk(state, cmd, request);
5290 trace_nfs4_get_lock(request, state, cmd, err);
5291 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
5293 } while (exception.retry);
5297 static int do_vfs_lock(struct file *file, struct file_lock *fl)
5300 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5302 res = posix_lock_file_wait(file, fl);
5305 res = flock_lock_file_wait(file, fl);
5313 struct nfs4_unlockdata {
5314 struct nfs_locku_args arg;
5315 struct nfs_locku_res res;
5316 struct nfs4_lock_state *lsp;
5317 struct nfs_open_context *ctx;
5318 struct file_lock fl;
5319 const struct nfs_server *server;
5320 unsigned long timestamp;
5323 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5324 struct nfs_open_context *ctx,
5325 struct nfs4_lock_state *lsp,
5326 struct nfs_seqid *seqid)
5328 struct nfs4_unlockdata *p;
5329 struct inode *inode = lsp->ls_state->inode;
5331 p = kzalloc(sizeof(*p), GFP_NOFS);
5334 p->arg.fh = NFS_FH(inode);
5336 p->arg.seqid = seqid;
5337 p->res.seqid = seqid;
5338 p->arg.stateid = &lsp->ls_stateid;
5340 atomic_inc(&lsp->ls_count);
5341 /* Ensure we don't close file until we're done freeing locks! */
5342 p->ctx = get_nfs_open_context(ctx);
5343 memcpy(&p->fl, fl, sizeof(p->fl));
5344 p->server = NFS_SERVER(inode);
5348 static void nfs4_locku_release_calldata(void *data)
5350 struct nfs4_unlockdata *calldata = data;
5351 nfs_free_seqid(calldata->arg.seqid);
5352 nfs4_put_lock_state(calldata->lsp);
5353 put_nfs_open_context(calldata->ctx);
5357 static void nfs4_locku_done(struct rpc_task *task, void *data)
5359 struct nfs4_unlockdata *calldata = data;
5361 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5363 switch (task->tk_status) {
5365 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5366 &calldata->res.stateid);
5367 renew_lease(calldata->server, calldata->timestamp);
5369 case -NFS4ERR_BAD_STATEID:
5370 case -NFS4ERR_OLD_STATEID:
5371 case -NFS4ERR_STALE_STATEID:
5372 case -NFS4ERR_EXPIRED:
5375 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
5376 rpc_restart_call_prepare(task);
5378 nfs_release_seqid(calldata->arg.seqid);
5381 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
5383 struct nfs4_unlockdata *calldata = data;
5385 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
5387 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
5388 /* Note: exit _without_ running nfs4_locku_done */
5391 calldata->timestamp = jiffies;
5392 if (nfs4_setup_sequence(calldata->server,
5393 &calldata->arg.seq_args,
5394 &calldata->res.seq_res,
5396 nfs_release_seqid(calldata->arg.seqid);
5399 task->tk_action = NULL;
5401 nfs4_sequence_done(task, &calldata->res.seq_res);
5404 static const struct rpc_call_ops nfs4_locku_ops = {
5405 .rpc_call_prepare = nfs4_locku_prepare,
5406 .rpc_call_done = nfs4_locku_done,
5407 .rpc_release = nfs4_locku_release_calldata,
5410 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5411 struct nfs_open_context *ctx,
5412 struct nfs4_lock_state *lsp,
5413 struct nfs_seqid *seqid)
5415 struct nfs4_unlockdata *data;
5416 struct rpc_message msg = {
5417 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5418 .rpc_cred = ctx->cred,
5420 struct rpc_task_setup task_setup_data = {
5421 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5422 .rpc_message = &msg,
5423 .callback_ops = &nfs4_locku_ops,
5424 .workqueue = nfsiod_workqueue,
5425 .flags = RPC_TASK_ASYNC,
5428 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5429 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5431 /* Ensure this is an unlock - when canceling a lock, the
5432 * canceled lock is passed in, and it won't be an unlock.
5434 fl->fl_type = F_UNLCK;
5436 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5438 nfs_free_seqid(seqid);
5439 return ERR_PTR(-ENOMEM);
5442 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5443 msg.rpc_argp = &data->arg;
5444 msg.rpc_resp = &data->res;
5445 task_setup_data.callback_data = data;
5446 return rpc_run_task(&task_setup_data);
5449 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5451 struct inode *inode = state->inode;
5452 struct nfs4_state_owner *sp = state->owner;
5453 struct nfs_inode *nfsi = NFS_I(inode);
5454 struct nfs_seqid *seqid;
5455 struct nfs4_lock_state *lsp;
5456 struct rpc_task *task;
5458 unsigned char fl_flags = request->fl_flags;
5460 status = nfs4_set_lock_state(state, request);
5461 /* Unlock _before_ we do the RPC call */
5462 request->fl_flags |= FL_EXISTS;
5463 /* Exclude nfs_delegation_claim_locks() */
5464 mutex_lock(&sp->so_delegreturn_mutex);
5465 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
5466 down_read(&nfsi->rwsem);
5467 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5468 up_read(&nfsi->rwsem);
5469 mutex_unlock(&sp->so_delegreturn_mutex);
5472 up_read(&nfsi->rwsem);
5473 mutex_unlock(&sp->so_delegreturn_mutex);
5476 /* Is this a delegated lock? */
5477 lsp = request->fl_u.nfs4_fl.owner;
5478 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5480 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
5484 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
5485 status = PTR_ERR(task);
5488 status = nfs4_wait_for_completion_rpc_task(task);
5491 request->fl_flags = fl_flags;
5492 trace_nfs4_unlock(request, state, F_SETLK, status);
5496 struct nfs4_lockdata {
5497 struct nfs_lock_args arg;
5498 struct nfs_lock_res res;
5499 struct nfs4_lock_state *lsp;
5500 struct nfs_open_context *ctx;
5501 struct file_lock fl;
5502 unsigned long timestamp;
5505 struct nfs_server *server;
5508 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
5509 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5512 struct nfs4_lockdata *p;
5513 struct inode *inode = lsp->ls_state->inode;
5514 struct nfs_server *server = NFS_SERVER(inode);
5516 p = kzalloc(sizeof(*p), gfp_mask);
5520 p->arg.fh = NFS_FH(inode);
5522 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
5523 if (p->arg.open_seqid == NULL)
5525 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
5526 if (p->arg.lock_seqid == NULL)
5527 goto out_free_seqid;
5528 p->arg.lock_stateid = &lsp->ls_stateid;
5529 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
5530 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
5531 p->arg.lock_owner.s_dev = server->s_dev;
5532 p->res.lock_seqid = p->arg.lock_seqid;
5535 atomic_inc(&lsp->ls_count);
5536 p->ctx = get_nfs_open_context(ctx);
5537 memcpy(&p->fl, fl, sizeof(p->fl));
5540 nfs_free_seqid(p->arg.open_seqid);
5546 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5548 struct nfs4_lockdata *data = calldata;
5549 struct nfs4_state *state = data->lsp->ls_state;
5551 dprintk("%s: begin!\n", __func__);
5552 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
5554 /* Do we need to do an open_to_lock_owner? */
5555 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
5556 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
5557 goto out_release_lock_seqid;
5559 data->arg.open_stateid = &state->open_stateid;
5560 data->arg.new_lock_owner = 1;
5561 data->res.open_seqid = data->arg.open_seqid;
5563 data->arg.new_lock_owner = 0;
5564 if (!nfs4_valid_open_stateid(state)) {
5565 data->rpc_status = -EBADF;
5566 task->tk_action = NULL;
5567 goto out_release_open_seqid;
5569 data->timestamp = jiffies;
5570 if (nfs4_setup_sequence(data->server,
5571 &data->arg.seq_args,
5575 out_release_open_seqid:
5576 nfs_release_seqid(data->arg.open_seqid);
5577 out_release_lock_seqid:
5578 nfs_release_seqid(data->arg.lock_seqid);
5580 nfs4_sequence_done(task, &data->res.seq_res);
5581 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
5584 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5586 struct nfs4_lockdata *data = calldata;
5588 dprintk("%s: begin!\n", __func__);
5590 if (!nfs4_sequence_done(task, &data->res.seq_res))
5593 data->rpc_status = task->tk_status;
5594 if (data->arg.new_lock_owner != 0) {
5595 if (data->rpc_status == 0)
5596 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5600 if (data->rpc_status == 0) {
5601 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
5602 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
5603 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
5606 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
5609 static void nfs4_lock_release(void *calldata)
5611 struct nfs4_lockdata *data = calldata;
5613 dprintk("%s: begin!\n", __func__);
5614 nfs_free_seqid(data->arg.open_seqid);
5615 if (data->cancelled != 0) {
5616 struct rpc_task *task;
5617 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5618 data->arg.lock_seqid);
5620 rpc_put_task_async(task);
5621 dprintk("%s: cancelling lock!\n", __func__);
5623 nfs_free_seqid(data->arg.lock_seqid);
5624 nfs4_put_lock_state(data->lsp);
5625 put_nfs_open_context(data->ctx);
5627 dprintk("%s: done!\n", __func__);
5630 static const struct rpc_call_ops nfs4_lock_ops = {
5631 .rpc_call_prepare = nfs4_lock_prepare,
5632 .rpc_call_done = nfs4_lock_done,
5633 .rpc_release = nfs4_lock_release,
5636 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5639 case -NFS4ERR_ADMIN_REVOKED:
5640 case -NFS4ERR_BAD_STATEID:
5641 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
5642 if (new_lock_owner != 0 ||
5643 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
5644 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
5646 case -NFS4ERR_STALE_STATEID:
5647 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
5648 case -NFS4ERR_EXPIRED:
5649 nfs4_schedule_lease_recovery(server->nfs_client);
5653 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
5655 struct nfs4_lockdata *data;
5656 struct rpc_task *task;
5657 struct rpc_message msg = {
5658 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5659 .rpc_cred = state->owner->so_cred,
5661 struct rpc_task_setup task_setup_data = {
5662 .rpc_client = NFS_CLIENT(state->inode),
5663 .rpc_message = &msg,
5664 .callback_ops = &nfs4_lock_ops,
5665 .workqueue = nfsiod_workqueue,
5666 .flags = RPC_TASK_ASYNC,
5670 dprintk("%s: begin!\n", __func__);
5671 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
5672 fl->fl_u.nfs4_fl.owner,
5673 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
5677 data->arg.block = 1;
5678 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5679 msg.rpc_argp = &data->arg;
5680 msg.rpc_resp = &data->res;
5681 task_setup_data.callback_data = data;
5682 if (recovery_type > NFS_LOCK_NEW) {
5683 if (recovery_type == NFS_LOCK_RECLAIM)
5684 data->arg.reclaim = NFS_LOCK_RECLAIM;
5685 nfs4_set_sequence_privileged(&data->arg.seq_args);
5687 task = rpc_run_task(&task_setup_data);
5689 return PTR_ERR(task);
5690 ret = nfs4_wait_for_completion_rpc_task(task);
5692 ret = data->rpc_status;
5694 nfs4_handle_setlk_error(data->server, data->lsp,
5695 data->arg.new_lock_owner, ret);
5697 data->cancelled = 1;
5699 dprintk("%s: done, ret = %d!\n", __func__, ret);
5703 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5705 struct nfs_server *server = NFS_SERVER(state->inode);
5706 struct nfs4_exception exception = {
5707 .inode = state->inode,
5712 /* Cache the lock if possible... */
5713 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5715 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
5716 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
5717 if (err != -NFS4ERR_DELAY)
5719 nfs4_handle_exception(server, err, &exception);
5720 } while (exception.retry);
5724 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5726 struct nfs_server *server = NFS_SERVER(state->inode);
5727 struct nfs4_exception exception = {
5728 .inode = state->inode,
5732 err = nfs4_set_lock_state(state, request);
5735 if (!recover_lost_locks) {
5736 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5740 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5742 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
5743 trace_nfs4_lock_expired(request, state, F_SETLK, err);
5747 case -NFS4ERR_GRACE:
5748 case -NFS4ERR_DELAY:
5749 nfs4_handle_exception(server, err, &exception);
5752 } while (exception.retry);
5757 #if defined(CONFIG_NFS_V4_1)
5759 * nfs41_check_expired_locks - possibly free a lock stateid
5761 * @state: NFSv4 state for an inode
5763 * Returns NFS_OK if recovery for this stateid is now finished.
5764 * Otherwise a negative NFS4ERR value is returned.
5766 static int nfs41_check_expired_locks(struct nfs4_state *state)
5768 int status, ret = -NFS4ERR_BAD_STATEID;
5769 struct nfs4_lock_state *lsp;
5770 struct nfs_server *server = NFS_SERVER(state->inode);
5772 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
5773 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
5774 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5776 status = nfs41_test_stateid(server,
5779 trace_nfs4_test_lock_stateid(state, lsp, status);
5780 if (status != NFS_OK) {
5781 /* Free the stateid unless the server
5782 * informs us the stateid is unrecognized. */
5783 if (status != -NFS4ERR_BAD_STATEID)
5784 nfs41_free_stateid(server,
5787 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5796 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5798 int status = NFS_OK;
5800 if (test_bit(LK_STATE_IN_USE, &state->flags))
5801 status = nfs41_check_expired_locks(state);
5802 if (status != NFS_OK)
5803 status = nfs4_lock_expired(state, request);
5808 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5810 struct nfs4_state_owner *sp = state->owner;
5811 struct nfs_inode *nfsi = NFS_I(state->inode);
5812 unsigned char fl_flags = request->fl_flags;
5814 int status = -ENOLCK;
5816 if ((fl_flags & FL_POSIX) &&
5817 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5819 /* Is this a delegated open? */
5820 status = nfs4_set_lock_state(state, request);
5823 request->fl_flags |= FL_ACCESS;
5824 status = do_vfs_lock(request->fl_file, request);
5827 down_read(&nfsi->rwsem);
5828 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
5829 /* Yes: cache locks! */
5830 /* ...but avoid races with delegation recall... */
5831 request->fl_flags = fl_flags & ~FL_SLEEP;
5832 status = do_vfs_lock(request->fl_file, request);
5835 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5836 up_read(&nfsi->rwsem);
5837 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
5840 down_read(&nfsi->rwsem);
5841 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5842 status = -NFS4ERR_DELAY;
5845 /* Note: we always want to sleep here! */
5846 request->fl_flags = fl_flags | FL_SLEEP;
5847 if (do_vfs_lock(request->fl_file, request) < 0)
5848 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5849 "manager!\n", __func__);
5851 up_read(&nfsi->rwsem);
5853 request->fl_flags = fl_flags;
5857 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5859 struct nfs4_exception exception = {
5861 .inode = state->inode,
5866 err = _nfs4_proc_setlk(state, cmd, request);
5867 trace_nfs4_set_lock(request, state, cmd, err);
5868 if (err == -NFS4ERR_DENIED)
5870 err = nfs4_handle_exception(NFS_SERVER(state->inode),
5872 } while (exception.retry);
5877 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5879 struct nfs_open_context *ctx;
5880 struct nfs4_state *state;
5881 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5884 /* verify open state */
5885 ctx = nfs_file_open_context(filp);
5888 if (request->fl_start < 0 || request->fl_end < 0)
5891 if (IS_GETLK(cmd)) {
5893 return nfs4_proc_getlk(state, F_GETLK, request);
5897 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5900 if (request->fl_type == F_UNLCK) {
5902 return nfs4_proc_unlck(state, cmd, request);
5909 * Don't rely on the VFS having checked the file open mode,
5910 * since it won't do this for flock() locks.
5912 switch (request->fl_type) {
5914 if (!(filp->f_mode & FMODE_READ))
5918 if (!(filp->f_mode & FMODE_WRITE))
5923 status = nfs4_proc_setlk(state, cmd, request);
5924 if ((status != -EAGAIN) || IS_SETLK(cmd))
5926 timeout = nfs4_set_lock_task_retry(timeout);
5927 status = -ERESTARTSYS;
5930 } while(status < 0);
5934 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
5936 struct nfs_server *server = NFS_SERVER(state->inode);
5939 err = nfs4_set_lock_state(state, fl);
5942 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
5943 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
5946 struct nfs_release_lockowner_data {
5947 struct nfs4_lock_state *lsp;
5948 struct nfs_server *server;
5949 struct nfs_release_lockowner_args args;
5950 struct nfs_release_lockowner_res res;
5951 unsigned long timestamp;
5954 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
5956 struct nfs_release_lockowner_data *data = calldata;
5957 struct nfs_server *server = data->server;
5958 nfs40_setup_sequence(server, &data->args.seq_args,
5959 &data->res.seq_res, task);
5960 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5961 data->timestamp = jiffies;
5964 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
5966 struct nfs_release_lockowner_data *data = calldata;
5967 struct nfs_server *server = data->server;
5969 nfs40_sequence_done(task, &data->res.seq_res);
5971 switch (task->tk_status) {
5973 renew_lease(server, data->timestamp);
5975 case -NFS4ERR_STALE_CLIENTID:
5976 case -NFS4ERR_EXPIRED:
5977 nfs4_schedule_lease_recovery(server->nfs_client);
5979 case -NFS4ERR_LEASE_MOVED:
5980 case -NFS4ERR_DELAY:
5981 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN)
5982 rpc_restart_call_prepare(task);
5986 static void nfs4_release_lockowner_release(void *calldata)
5988 struct nfs_release_lockowner_data *data = calldata;
5989 nfs4_free_lock_state(data->server, data->lsp);
5993 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
5994 .rpc_call_prepare = nfs4_release_lockowner_prepare,
5995 .rpc_call_done = nfs4_release_lockowner_done,
5996 .rpc_release = nfs4_release_lockowner_release,
6000 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
6002 struct nfs_release_lockowner_data *data;
6003 struct rpc_message msg = {
6004 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6007 if (server->nfs_client->cl_mvops->minor_version != 0)
6010 data = kmalloc(sizeof(*data), GFP_NOFS);
6014 data->server = server;
6015 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6016 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6017 data->args.lock_owner.s_dev = server->s_dev;
6019 msg.rpc_argp = &data->args;
6020 msg.rpc_resp = &data->res;
6021 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
6022 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
6025 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6027 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6028 const void *buf, size_t buflen,
6029 int flags, int type)
6031 if (strcmp(key, "") != 0)
6034 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6037 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6038 void *buf, size_t buflen, int type)
6040 if (strcmp(key, "") != 0)
6043 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6046 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6047 size_t list_len, const char *name,
6048 size_t name_len, int type)
6050 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6052 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
6055 if (list && len <= list_len)
6056 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
6060 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
6061 static inline int nfs4_server_supports_labels(struct nfs_server *server)
6063 return server->caps & NFS_CAP_SECURITY_LABEL;
6066 static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6067 const void *buf, size_t buflen,
6068 int flags, int type)
6070 if (security_ismaclabel(key))
6071 return nfs4_set_security_label(dentry, buf, buflen);
6076 static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6077 void *buf, size_t buflen, int type)
6079 if (security_ismaclabel(key))
6080 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
6084 static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6085 size_t list_len, const char *name,
6086 size_t name_len, int type)
6090 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
6091 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
6092 if (list && len <= list_len)
6093 security_inode_listsecurity(dentry->d_inode, list, len);
6098 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6099 .prefix = XATTR_SECURITY_PREFIX,
6100 .list = nfs4_xattr_list_nfs4_label,
6101 .get = nfs4_xattr_get_nfs4_label,
6102 .set = nfs4_xattr_set_nfs4_label,
6108 * nfs_fhget will use either the mounted_on_fileid or the fileid
6110 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6112 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6113 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6114 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
6115 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
6118 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
6119 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
6120 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6124 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6125 const struct qstr *name,
6126 struct nfs4_fs_locations *fs_locations,
6129 struct nfs_server *server = NFS_SERVER(dir);
6131 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6133 struct nfs4_fs_locations_arg args = {
6134 .dir_fh = NFS_FH(dir),
6139 struct nfs4_fs_locations_res res = {
6140 .fs_locations = fs_locations,
6142 struct rpc_message msg = {
6143 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6149 dprintk("%s: start\n", __func__);
6151 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6152 * is not supported */
6153 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6154 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6156 bitmask[0] |= FATTR4_WORD0_FILEID;
6158 nfs_fattr_init(&fs_locations->fattr);
6159 fs_locations->server = server;
6160 fs_locations->nlocations = 0;
6161 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
6162 dprintk("%s: returned status = %d\n", __func__, status);
6166 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6167 const struct qstr *name,
6168 struct nfs4_fs_locations *fs_locations,
6171 struct nfs4_exception exception = { };
6174 err = _nfs4_proc_fs_locations(client, dir, name,
6175 fs_locations, page);
6176 trace_nfs4_get_fs_locations(dir, name, err);
6177 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6179 } while (exception.retry);
6184 * This operation also signals the server that this client is
6185 * performing migration recovery. The server can stop returning
6186 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6187 * appended to this compound to identify the client ID which is
6188 * performing recovery.
6190 static int _nfs40_proc_get_locations(struct inode *inode,
6191 struct nfs4_fs_locations *locations,
6192 struct page *page, struct rpc_cred *cred)
6194 struct nfs_server *server = NFS_SERVER(inode);
6195 struct rpc_clnt *clnt = server->client;
6197 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6199 struct nfs4_fs_locations_arg args = {
6200 .clientid = server->nfs_client->cl_clientid,
6201 .fh = NFS_FH(inode),
6204 .migration = 1, /* skip LOOKUP */
6205 .renew = 1, /* append RENEW */
6207 struct nfs4_fs_locations_res res = {
6208 .fs_locations = locations,
6212 struct rpc_message msg = {
6213 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6218 unsigned long now = jiffies;
6221 nfs_fattr_init(&locations->fattr);
6222 locations->server = server;
6223 locations->nlocations = 0;
6225 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6226 nfs4_set_sequence_privileged(&args.seq_args);
6227 status = nfs4_call_sync_sequence(clnt, server, &msg,
6228 &args.seq_args, &res.seq_res);
6232 renew_lease(server, now);
6236 #ifdef CONFIG_NFS_V4_1
6239 * This operation also signals the server that this client is
6240 * performing migration recovery. The server can stop asserting
6241 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6242 * performing this operation is identified in the SEQUENCE
6243 * operation in this compound.
6245 * When the client supports GETATTR(fs_locations_info), it can
6246 * be plumbed in here.
6248 static int _nfs41_proc_get_locations(struct inode *inode,
6249 struct nfs4_fs_locations *locations,
6250 struct page *page, struct rpc_cred *cred)
6252 struct nfs_server *server = NFS_SERVER(inode);
6253 struct rpc_clnt *clnt = server->client;
6255 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6257 struct nfs4_fs_locations_arg args = {
6258 .fh = NFS_FH(inode),
6261 .migration = 1, /* skip LOOKUP */
6263 struct nfs4_fs_locations_res res = {
6264 .fs_locations = locations,
6267 struct rpc_message msg = {
6268 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6275 nfs_fattr_init(&locations->fattr);
6276 locations->server = server;
6277 locations->nlocations = 0;
6279 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6280 nfs4_set_sequence_privileged(&args.seq_args);
6281 status = nfs4_call_sync_sequence(clnt, server, &msg,
6282 &args.seq_args, &res.seq_res);
6283 if (status == NFS4_OK &&
6284 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6285 status = -NFS4ERR_LEASE_MOVED;
6289 #endif /* CONFIG_NFS_V4_1 */
6292 * nfs4_proc_get_locations - discover locations for a migrated FSID
6293 * @inode: inode on FSID that is migrating
6294 * @locations: result of query
6296 * @cred: credential to use for this operation
6298 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6299 * operation failed, or a negative errno if a local error occurred.
6301 * On success, "locations" is filled in, but if the server has
6302 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6305 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6306 * from this client that require migration recovery.
6308 int nfs4_proc_get_locations(struct inode *inode,
6309 struct nfs4_fs_locations *locations,
6310 struct page *page, struct rpc_cred *cred)
6312 struct nfs_server *server = NFS_SERVER(inode);
6313 struct nfs_client *clp = server->nfs_client;
6314 const struct nfs4_mig_recovery_ops *ops =
6315 clp->cl_mvops->mig_recovery_ops;
6316 struct nfs4_exception exception = { };
6319 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6320 (unsigned long long)server->fsid.major,
6321 (unsigned long long)server->fsid.minor,
6323 nfs_display_fhandle(NFS_FH(inode), __func__);
6326 status = ops->get_locations(inode, locations, page, cred);
6327 if (status != -NFS4ERR_DELAY)
6329 nfs4_handle_exception(server, status, &exception);
6330 } while (exception.retry);
6335 * This operation also signals the server that this client is
6336 * performing "lease moved" recovery. The server can stop
6337 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6338 * is appended to this compound to identify the client ID which is
6339 * performing recovery.
6341 static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6343 struct nfs_server *server = NFS_SERVER(inode);
6344 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6345 struct rpc_clnt *clnt = server->client;
6346 struct nfs4_fsid_present_arg args = {
6347 .fh = NFS_FH(inode),
6348 .clientid = clp->cl_clientid,
6349 .renew = 1, /* append RENEW */
6351 struct nfs4_fsid_present_res res = {
6354 struct rpc_message msg = {
6355 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6360 unsigned long now = jiffies;
6363 res.fh = nfs_alloc_fhandle();
6367 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6368 nfs4_set_sequence_privileged(&args.seq_args);
6369 status = nfs4_call_sync_sequence(clnt, server, &msg,
6370 &args.seq_args, &res.seq_res);
6371 nfs_free_fhandle(res.fh);
6375 do_renew_lease(clp, now);
6379 #ifdef CONFIG_NFS_V4_1
6382 * This operation also signals the server that this client is
6383 * performing "lease moved" recovery. The server can stop asserting
6384 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6385 * this operation is identified in the SEQUENCE operation in this
6388 static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6390 struct nfs_server *server = NFS_SERVER(inode);
6391 struct rpc_clnt *clnt = server->client;
6392 struct nfs4_fsid_present_arg args = {
6393 .fh = NFS_FH(inode),
6395 struct nfs4_fsid_present_res res = {
6397 struct rpc_message msg = {
6398 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6405 res.fh = nfs_alloc_fhandle();
6409 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6410 nfs4_set_sequence_privileged(&args.seq_args);
6411 status = nfs4_call_sync_sequence(clnt, server, &msg,
6412 &args.seq_args, &res.seq_res);
6413 nfs_free_fhandle(res.fh);
6414 if (status == NFS4_OK &&
6415 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6416 status = -NFS4ERR_LEASE_MOVED;
6420 #endif /* CONFIG_NFS_V4_1 */
6423 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6424 * @inode: inode on FSID to check
6425 * @cred: credential to use for this operation
6427 * Server indicates whether the FSID is present, moved, or not
6428 * recognized. This operation is necessary to clear a LEASE_MOVED
6429 * condition for this client ID.
6431 * Returns NFS4_OK if the FSID is present on this server,
6432 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6433 * NFS4ERR code if some error occurred on the server, or a
6434 * negative errno if a local failure occurred.
6436 int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6438 struct nfs_server *server = NFS_SERVER(inode);
6439 struct nfs_client *clp = server->nfs_client;
6440 const struct nfs4_mig_recovery_ops *ops =
6441 clp->cl_mvops->mig_recovery_ops;
6442 struct nfs4_exception exception = { };
6445 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6446 (unsigned long long)server->fsid.major,
6447 (unsigned long long)server->fsid.minor,
6449 nfs_display_fhandle(NFS_FH(inode), __func__);
6452 status = ops->fsid_present(inode, cred);
6453 if (status != -NFS4ERR_DELAY)
6455 nfs4_handle_exception(server, status, &exception);
6456 } while (exception.retry);
6461 * If 'use_integrity' is true and the state managment nfs_client
6462 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6463 * and the machine credential as per RFC3530bis and RFC5661 Security
6464 * Considerations sections. Otherwise, just use the user cred with the
6465 * filesystem's rpc_client.
6467 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
6470 struct nfs4_secinfo_arg args = {
6471 .dir_fh = NFS_FH(dir),
6474 struct nfs4_secinfo_res res = {
6477 struct rpc_message msg = {
6478 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6482 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
6483 struct rpc_cred *cred = NULL;
6485 if (use_integrity) {
6486 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
6487 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6488 msg.rpc_cred = cred;
6491 dprintk("NFS call secinfo %s\n", name->name);
6493 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6494 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6496 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6498 dprintk("NFS reply secinfo: %d\n", status);
6506 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6507 struct nfs4_secinfo_flavors *flavors)
6509 struct nfs4_exception exception = { };
6512 err = -NFS4ERR_WRONGSEC;
6514 /* try to use integrity protection with machine cred */
6515 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6516 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6519 * if unable to use integrity protection, or SECINFO with
6520 * integrity protection returns NFS4ERR_WRONGSEC (which is
6521 * disallowed by spec, but exists in deployed servers) use
6522 * the current filesystem's rpc_client and the user cred.
6524 if (err == -NFS4ERR_WRONGSEC)
6525 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6527 trace_nfs4_secinfo(dir, name, err);
6528 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6530 } while (exception.retry);
6534 #ifdef CONFIG_NFS_V4_1
6536 * Check the exchange flags returned by the server for invalid flags, having
6537 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6540 static int nfs4_check_cl_exchange_flags(u32 flags)
6542 if (flags & ~EXCHGID4_FLAG_MASK_R)
6544 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6545 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6547 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6551 return -NFS4ERR_INVAL;
6555 nfs41_same_server_scope(struct nfs41_server_scope *a,
6556 struct nfs41_server_scope *b)
6558 if (a->server_scope_sz == b->server_scope_sz &&
6559 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6566 * nfs4_proc_bind_conn_to_session()
6568 * The 4.1 client currently uses the same TCP connection for the
6569 * fore and backchannel.
6571 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
6574 struct nfs41_bind_conn_to_session_res res;
6575 struct rpc_message msg = {
6577 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6583 dprintk("--> %s\n", __func__);
6585 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
6586 if (unlikely(res.session == NULL)) {
6591 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6592 trace_nfs4_bind_conn_to_session(clp, status);
6594 if (memcmp(res.session->sess_id.data,
6595 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6596 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6600 if (res.dir != NFS4_CDFS4_BOTH) {
6601 dprintk("NFS: %s: Unexpected direction from server\n",
6606 if (res.use_conn_in_rdma_mode) {
6607 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6616 dprintk("<-- %s status= %d\n", __func__, status);
6621 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6622 * and operations we'd like to see to enable certain features in the allow map
6624 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6625 .how = SP4_MACH_CRED,
6626 .enforce.u.words = {
6627 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6628 1 << (OP_EXCHANGE_ID - 32) |
6629 1 << (OP_CREATE_SESSION - 32) |
6630 1 << (OP_DESTROY_SESSION - 32) |
6631 1 << (OP_DESTROY_CLIENTID - 32)
6634 [0] = 1 << (OP_CLOSE) |
6637 [1] = 1 << (OP_SECINFO - 32) |
6638 1 << (OP_SECINFO_NO_NAME - 32) |
6639 1 << (OP_TEST_STATEID - 32) |
6640 1 << (OP_FREE_STATEID - 32) |
6641 1 << (OP_WRITE - 32)
6646 * Select the state protection mode for client `clp' given the server results
6647 * from exchange_id in `sp'.
6649 * Returns 0 on success, negative errno otherwise.
6651 static int nfs4_sp4_select_mode(struct nfs_client *clp,
6652 struct nfs41_state_protection *sp)
6654 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6655 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6656 1 << (OP_EXCHANGE_ID - 32) |
6657 1 << (OP_CREATE_SESSION - 32) |
6658 1 << (OP_DESTROY_SESSION - 32) |
6659 1 << (OP_DESTROY_CLIENTID - 32)
6663 if (sp->how == SP4_MACH_CRED) {
6664 /* Print state protect result */
6665 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6666 for (i = 0; i <= LAST_NFS4_OP; i++) {
6667 if (test_bit(i, sp->enforce.u.longs))
6668 dfprintk(MOUNT, " enforce op %d\n", i);
6669 if (test_bit(i, sp->allow.u.longs))
6670 dfprintk(MOUNT, " allow op %d\n", i);
6673 /* make sure nothing is on enforce list that isn't supported */
6674 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6675 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6676 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6682 * Minimal mode - state operations are allowed to use machine
6683 * credential. Note this already happens by default, so the
6684 * client doesn't have to do anything more than the negotiation.
6686 * NOTE: we don't care if EXCHANGE_ID is in the list -
6687 * we're already using the machine cred for exchange_id
6688 * and will never use a different cred.
6690 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6691 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6692 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6693 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6694 dfprintk(MOUNT, "sp4_mach_cred:\n");
6695 dfprintk(MOUNT, " minimal mode enabled\n");
6696 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6698 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6702 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6703 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6704 dfprintk(MOUNT, " cleanup mode enabled\n");
6705 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6708 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6709 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6710 dfprintk(MOUNT, " secinfo mode enabled\n");
6711 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6714 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6715 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6716 dfprintk(MOUNT, " stateid mode enabled\n");
6717 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6720 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6721 dfprintk(MOUNT, " write mode enabled\n");
6722 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6725 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6726 dfprintk(MOUNT, " commit mode enabled\n");
6727 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6735 * _nfs4_proc_exchange_id()
6737 * Wrapper for EXCHANGE_ID operation.
6739 static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6742 nfs4_verifier verifier;
6743 struct nfs41_exchange_id_args args = {
6744 .verifier = &verifier,
6746 #ifdef CONFIG_NFS_V4_1_MIGRATION
6747 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6748 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6749 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6751 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6752 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6755 struct nfs41_exchange_id_res res = {
6759 struct rpc_message msg = {
6760 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6766 nfs4_init_boot_verifier(clp, &verifier);
6767 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6769 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6770 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6771 args.id_len, args.id);
6773 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
6775 if (unlikely(res.server_owner == NULL)) {
6780 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
6782 if (unlikely(res.server_scope == NULL)) {
6784 goto out_server_owner;
6787 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
6788 if (unlikely(res.impl_id == NULL)) {
6790 goto out_server_scope;
6795 args.state_protect.how = SP4_NONE;
6799 args.state_protect = nfs4_sp4_mach_cred_request;
6806 goto out_server_scope;
6809 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6810 trace_nfs4_exchange_id(clp, status);
6812 status = nfs4_check_cl_exchange_flags(res.flags);
6815 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6818 clp->cl_clientid = res.clientid;
6819 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6820 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6821 clp->cl_seqid = res.seqid;
6823 kfree(clp->cl_serverowner);
6824 clp->cl_serverowner = res.server_owner;
6825 res.server_owner = NULL;
6827 /* use the most recent implementation id */
6828 kfree(clp->cl_implid);
6829 clp->cl_implid = res.impl_id;
6831 if (clp->cl_serverscope != NULL &&
6832 !nfs41_same_server_scope(clp->cl_serverscope,
6833 res.server_scope)) {
6834 dprintk("%s: server_scope mismatch detected\n",
6836 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
6837 kfree(clp->cl_serverscope);
6838 clp->cl_serverscope = NULL;
6841 if (clp->cl_serverscope == NULL) {
6842 clp->cl_serverscope = res.server_scope;
6849 kfree(res.server_owner);
6851 kfree(res.server_scope);
6853 if (clp->cl_implid != NULL)
6854 dprintk("NFS reply exchange_id: Server Implementation ID: "
6855 "domain: %s, name: %s, date: %llu,%u\n",
6856 clp->cl_implid->domain, clp->cl_implid->name,
6857 clp->cl_implid->date.seconds,
6858 clp->cl_implid->date.nseconds);
6859 dprintk("NFS reply exchange_id: %d\n", status);
6864 * nfs4_proc_exchange_id()
6866 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6868 * Since the clientid has expired, all compounds using sessions
6869 * associated with the stale clientid will be returning
6870 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6871 * be in some phase of session reset.
6873 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6875 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6877 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6880 /* try SP4_MACH_CRED if krb5i/p */
6881 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6882 authflavor == RPC_AUTH_GSS_KRB5P) {
6883 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6889 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6892 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6893 struct rpc_cred *cred)
6895 struct rpc_message msg = {
6896 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6902 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6903 trace_nfs4_destroy_clientid(clp, status);
6905 dprintk("NFS: Got error %d from the server %s on "
6906 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6910 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6911 struct rpc_cred *cred)
6916 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6917 ret = _nfs4_proc_destroy_clientid(clp, cred);
6919 case -NFS4ERR_DELAY:
6920 case -NFS4ERR_CLIENTID_BUSY:
6930 int nfs4_destroy_clientid(struct nfs_client *clp)
6932 struct rpc_cred *cred;
6935 if (clp->cl_mvops->minor_version < 1)
6937 if (clp->cl_exchange_flags == 0)
6939 if (clp->cl_preserve_clid)
6941 cred = nfs4_get_clid_cred(clp);
6942 ret = nfs4_proc_destroy_clientid(clp, cred);
6947 case -NFS4ERR_STALE_CLIENTID:
6948 clp->cl_exchange_flags = 0;
6954 struct nfs4_get_lease_time_data {
6955 struct nfs4_get_lease_time_args *args;
6956 struct nfs4_get_lease_time_res *res;
6957 struct nfs_client *clp;
6960 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6963 struct nfs4_get_lease_time_data *data =
6964 (struct nfs4_get_lease_time_data *)calldata;
6966 dprintk("--> %s\n", __func__);
6967 /* just setup sequence, do not trigger session recovery
6968 since we're invoked within one */
6969 nfs41_setup_sequence(data->clp->cl_session,
6970 &data->args->la_seq_args,
6971 &data->res->lr_seq_res,
6973 dprintk("<-- %s\n", __func__);
6977 * Called from nfs4_state_manager thread for session setup, so don't recover
6978 * from sequence operation or clientid errors.
6980 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6982 struct nfs4_get_lease_time_data *data =
6983 (struct nfs4_get_lease_time_data *)calldata;
6985 dprintk("--> %s\n", __func__);
6986 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6988 switch (task->tk_status) {
6989 case -NFS4ERR_DELAY:
6990 case -NFS4ERR_GRACE:
6991 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
6992 rpc_delay(task, NFS4_POLL_RETRY_MIN);
6993 task->tk_status = 0;
6995 case -NFS4ERR_RETRY_UNCACHED_REP:
6996 rpc_restart_call_prepare(task);
6999 dprintk("<-- %s\n", __func__);
7002 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
7003 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7004 .rpc_call_done = nfs4_get_lease_time_done,
7007 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7009 struct rpc_task *task;
7010 struct nfs4_get_lease_time_args args;
7011 struct nfs4_get_lease_time_res res = {
7012 .lr_fsinfo = fsinfo,
7014 struct nfs4_get_lease_time_data data = {
7019 struct rpc_message msg = {
7020 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7024 struct rpc_task_setup task_setup = {
7025 .rpc_client = clp->cl_rpcclient,
7026 .rpc_message = &msg,
7027 .callback_ops = &nfs4_get_lease_time_ops,
7028 .callback_data = &data,
7029 .flags = RPC_TASK_TIMEOUT,
7033 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
7034 nfs4_set_sequence_privileged(&args.la_seq_args);
7035 dprintk("--> %s\n", __func__);
7036 task = rpc_run_task(&task_setup);
7039 status = PTR_ERR(task);
7041 status = task->tk_status;
7044 dprintk("<-- %s return %d\n", __func__, status);
7050 * Initialize the values to be used by the client in CREATE_SESSION
7051 * If nfs4_init_session set the fore channel request and response sizes,
7054 * Set the back channel max_resp_sz_cached to zero to force the client to
7055 * always set csa_cachethis to FALSE because the current implementation
7056 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7058 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7060 unsigned int max_rqst_sz, max_resp_sz;
7062 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7063 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
7065 /* Fore channel attributes */
7066 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7067 args->fc_attrs.max_resp_sz = max_resp_sz;
7068 args->fc_attrs.max_ops = NFS4_MAX_OPS;
7069 args->fc_attrs.max_reqs = max_session_slots;
7071 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
7072 "max_ops=%u max_reqs=%u\n",
7074 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
7075 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
7077 /* Back channel attributes */
7078 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7079 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7080 args->bc_attrs.max_resp_sz_cached = 0;
7081 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7082 args->bc_attrs.max_reqs = 1;
7084 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7085 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7087 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7088 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7089 args->bc_attrs.max_reqs);
7092 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
7094 struct nfs4_channel_attrs *sent = &args->fc_attrs;
7095 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
7097 if (rcvd->max_resp_sz > sent->max_resp_sz)
7100 * Our requested max_ops is the minimum we need; we're not
7101 * prepared to break up compounds into smaller pieces than that.
7102 * So, no point even trying to continue if the server won't
7105 if (rcvd->max_ops < sent->max_ops)
7107 if (rcvd->max_reqs == 0)
7109 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7110 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
7114 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
7116 struct nfs4_channel_attrs *sent = &args->bc_attrs;
7117 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
7119 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7121 if (rcvd->max_resp_sz < sent->max_resp_sz)
7123 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7125 /* These would render the backchannel useless: */
7126 if (rcvd->max_ops != sent->max_ops)
7128 if (rcvd->max_reqs != sent->max_reqs)
7133 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7134 struct nfs4_session *session)
7138 ret = nfs4_verify_fore_channel_attrs(args, session);
7141 return nfs4_verify_back_channel_attrs(args, session);
7144 static int _nfs4_proc_create_session(struct nfs_client *clp,
7145 struct rpc_cred *cred)
7147 struct nfs4_session *session = clp->cl_session;
7148 struct nfs41_create_session_args args = {
7150 .cb_program = NFS4_CALLBACK,
7152 struct nfs41_create_session_res res = {
7155 struct rpc_message msg = {
7156 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7163 nfs4_init_channel_attrs(&args);
7164 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
7166 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7167 trace_nfs4_create_session(clp, status);
7170 /* Verify the session's negotiated channel_attrs values */
7171 status = nfs4_verify_channel_attrs(&args, session);
7172 /* Increment the clientid slot sequence id */
7180 * Issues a CREATE_SESSION operation to the server.
7181 * It is the responsibility of the caller to verify the session is
7182 * expired before calling this routine.
7184 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
7188 struct nfs4_session *session = clp->cl_session;
7190 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7192 status = _nfs4_proc_create_session(clp, cred);
7196 /* Init or reset the session slot tables */
7197 status = nfs4_setup_session_slot_tables(session);
7198 dprintk("slot table setup returned %d\n", status);
7202 ptr = (unsigned *)&session->sess_id.data[0];
7203 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7204 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
7206 dprintk("<-- %s\n", __func__);
7211 * Issue the over-the-wire RPC DESTROY_SESSION.
7212 * The caller must serialize access to this routine.
7214 int nfs4_proc_destroy_session(struct nfs4_session *session,
7215 struct rpc_cred *cred)
7217 struct rpc_message msg = {
7218 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7219 .rpc_argp = session,
7224 dprintk("--> nfs4_proc_destroy_session\n");
7226 /* session is still being setup */
7227 if (session->clp->cl_cons_state != NFS_CS_READY)
7230 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7231 trace_nfs4_destroy_session(session->clp, status);
7234 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
7235 "Session has been destroyed regardless...\n", status);
7237 dprintk("<-- nfs4_proc_destroy_session\n");
7242 * Renew the cl_session lease.
7244 struct nfs4_sequence_data {
7245 struct nfs_client *clp;
7246 struct nfs4_sequence_args args;
7247 struct nfs4_sequence_res res;
7250 static void nfs41_sequence_release(void *data)
7252 struct nfs4_sequence_data *calldata = data;
7253 struct nfs_client *clp = calldata->clp;
7255 if (atomic_read(&clp->cl_count) > 1)
7256 nfs4_schedule_state_renewal(clp);
7257 nfs_put_client(clp);
7261 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7263 switch(task->tk_status) {
7264 case -NFS4ERR_DELAY:
7265 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7268 nfs4_schedule_lease_recovery(clp);
7273 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
7275 struct nfs4_sequence_data *calldata = data;
7276 struct nfs_client *clp = calldata->clp;
7278 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7281 trace_nfs4_sequence(clp, task->tk_status);
7282 if (task->tk_status < 0) {
7283 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7284 if (atomic_read(&clp->cl_count) == 1)
7287 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7288 rpc_restart_call_prepare(task);
7292 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7294 dprintk("<-- %s\n", __func__);
7297 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7299 struct nfs4_sequence_data *calldata = data;
7300 struct nfs_client *clp = calldata->clp;
7301 struct nfs4_sequence_args *args;
7302 struct nfs4_sequence_res *res;
7304 args = task->tk_msg.rpc_argp;
7305 res = task->tk_msg.rpc_resp;
7307 nfs41_setup_sequence(clp->cl_session, args, res, task);
7310 static const struct rpc_call_ops nfs41_sequence_ops = {
7311 .rpc_call_done = nfs41_sequence_call_done,
7312 .rpc_call_prepare = nfs41_sequence_prepare,
7313 .rpc_release = nfs41_sequence_release,
7316 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7317 struct rpc_cred *cred,
7320 struct nfs4_sequence_data *calldata;
7321 struct rpc_message msg = {
7322 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7325 struct rpc_task_setup task_setup_data = {
7326 .rpc_client = clp->cl_rpcclient,
7327 .rpc_message = &msg,
7328 .callback_ops = &nfs41_sequence_ops,
7329 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
7332 if (!atomic_inc_not_zero(&clp->cl_count))
7333 return ERR_PTR(-EIO);
7334 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7335 if (calldata == NULL) {
7336 nfs_put_client(clp);
7337 return ERR_PTR(-ENOMEM);
7339 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
7341 nfs4_set_sequence_privileged(&calldata->args);
7342 msg.rpc_argp = &calldata->args;
7343 msg.rpc_resp = &calldata->res;
7344 calldata->clp = clp;
7345 task_setup_data.callback_data = calldata;
7347 return rpc_run_task(&task_setup_data);
7350 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
7352 struct rpc_task *task;
7355 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
7357 task = _nfs41_proc_sequence(clp, cred, false);
7359 ret = PTR_ERR(task);
7361 rpc_put_task_async(task);
7362 dprintk("<-- %s status=%d\n", __func__, ret);
7366 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7368 struct rpc_task *task;
7371 task = _nfs41_proc_sequence(clp, cred, true);
7373 ret = PTR_ERR(task);
7376 ret = rpc_wait_for_completion_task(task);
7378 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7380 if (task->tk_status == 0)
7381 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
7382 ret = task->tk_status;
7386 dprintk("<-- %s status=%d\n", __func__, ret);
7390 struct nfs4_reclaim_complete_data {
7391 struct nfs_client *clp;
7392 struct nfs41_reclaim_complete_args arg;
7393 struct nfs41_reclaim_complete_res res;
7396 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7398 struct nfs4_reclaim_complete_data *calldata = data;
7400 nfs41_setup_sequence(calldata->clp->cl_session,
7401 &calldata->arg.seq_args,
7402 &calldata->res.seq_res,
7406 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7408 switch(task->tk_status) {
7410 case -NFS4ERR_COMPLETE_ALREADY:
7411 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7413 case -NFS4ERR_DELAY:
7414 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7416 case -NFS4ERR_RETRY_UNCACHED_REP:
7419 nfs4_schedule_lease_recovery(clp);
7424 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7426 struct nfs4_reclaim_complete_data *calldata = data;
7427 struct nfs_client *clp = calldata->clp;
7428 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7430 dprintk("--> %s\n", __func__);
7431 if (!nfs41_sequence_done(task, res))
7434 trace_nfs4_reclaim_complete(clp, task->tk_status);
7435 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7436 rpc_restart_call_prepare(task);
7439 dprintk("<-- %s\n", __func__);
7442 static void nfs4_free_reclaim_complete_data(void *data)
7444 struct nfs4_reclaim_complete_data *calldata = data;
7449 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7450 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7451 .rpc_call_done = nfs4_reclaim_complete_done,
7452 .rpc_release = nfs4_free_reclaim_complete_data,
7456 * Issue a global reclaim complete.
7458 static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7459 struct rpc_cred *cred)
7461 struct nfs4_reclaim_complete_data *calldata;
7462 struct rpc_task *task;
7463 struct rpc_message msg = {
7464 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
7467 struct rpc_task_setup task_setup_data = {
7468 .rpc_client = clp->cl_rpcclient,
7469 .rpc_message = &msg,
7470 .callback_ops = &nfs4_reclaim_complete_call_ops,
7471 .flags = RPC_TASK_ASYNC,
7473 int status = -ENOMEM;
7475 dprintk("--> %s\n", __func__);
7476 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7477 if (calldata == NULL)
7479 calldata->clp = clp;
7480 calldata->arg.one_fs = 0;
7482 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
7483 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
7484 msg.rpc_argp = &calldata->arg;
7485 msg.rpc_resp = &calldata->res;
7486 task_setup_data.callback_data = calldata;
7487 task = rpc_run_task(&task_setup_data);
7489 status = PTR_ERR(task);
7492 status = nfs4_wait_for_completion_rpc_task(task);
7494 status = task->tk_status;
7498 dprintk("<-- %s status=%d\n", __func__, status);
7503 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7505 struct nfs4_layoutget *lgp = calldata;
7506 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
7507 struct nfs4_session *session = nfs4_get_session(server);
7509 dprintk("--> %s\n", __func__);
7510 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7511 * right now covering the LAYOUTGET we are about to send.
7512 * However, that is not so catastrophic, and there seems
7513 * to be no way to prevent it completely.
7515 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
7516 &lgp->res.seq_res, task))
7518 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7519 NFS_I(lgp->args.inode)->layout,
7520 lgp->args.ctx->state)) {
7521 rpc_exit(task, NFS4_OK);
7525 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7527 struct nfs4_layoutget *lgp = calldata;
7528 struct inode *inode = lgp->args.inode;
7529 struct nfs_server *server = NFS_SERVER(inode);
7530 struct pnfs_layout_hdr *lo;
7531 struct nfs4_state *state = NULL;
7532 unsigned long timeo, now, giveup;
7534 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
7536 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
7539 switch (task->tk_status) {
7543 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7544 * (or clients) writing to the same RAID stripe
7546 case -NFS4ERR_LAYOUTTRYLATER:
7548 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7549 * existing layout before getting a new one).
7551 case -NFS4ERR_RECALLCONFLICT:
7552 timeo = rpc_get_timeout(task->tk_client);
7553 giveup = lgp->args.timestamp + timeo;
7555 if (time_after(giveup, now)) {
7556 unsigned long delay;
7559 * - Not less then NFS4_POLL_RETRY_MIN.
7560 * - One last time a jiffie before we give up
7561 * - exponential backoff (time_now minus start_attempt)
7563 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7564 min((giveup - now - 1),
7565 now - lgp->args.timestamp));
7567 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7569 rpc_delay(task, delay);
7570 task->tk_status = 0;
7571 rpc_restart_call_prepare(task);
7572 goto out; /* Do not call nfs4_async_handle_error() */
7575 case -NFS4ERR_EXPIRED:
7576 case -NFS4ERR_BAD_STATEID:
7577 spin_lock(&inode->i_lock);
7578 lo = NFS_I(inode)->layout;
7579 if (!lo || list_empty(&lo->plh_segs)) {
7580 spin_unlock(&inode->i_lock);
7581 /* If the open stateid was bad, then recover it. */
7582 state = lgp->args.ctx->state;
7586 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7587 spin_unlock(&inode->i_lock);
7588 /* Mark the bad layout state as invalid, then
7589 * retry using the open stateid. */
7590 pnfs_free_lseg_list(&head);
7593 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
7594 rpc_restart_call_prepare(task);
7596 dprintk("<-- %s\n", __func__);
7599 static size_t max_response_pages(struct nfs_server *server)
7601 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7602 return nfs_page_array_len(0, max_resp_sz);
7605 static void nfs4_free_pages(struct page **pages, size_t size)
7612 for (i = 0; i < size; i++) {
7615 __free_page(pages[i]);
7620 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7622 struct page **pages;
7625 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7627 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7631 for (i = 0; i < size; i++) {
7632 pages[i] = alloc_page(gfp_flags);
7634 dprintk("%s: failed to allocate page\n", __func__);
7635 nfs4_free_pages(pages, size);
7643 static void nfs4_layoutget_release(void *calldata)
7645 struct nfs4_layoutget *lgp = calldata;
7646 struct inode *inode = lgp->args.inode;
7647 struct nfs_server *server = NFS_SERVER(inode);
7648 size_t max_pages = max_response_pages(server);
7650 dprintk("--> %s\n", __func__);
7651 nfs4_free_pages(lgp->args.layout.pages, max_pages);
7652 pnfs_put_layout_hdr(NFS_I(inode)->layout);
7653 put_nfs_open_context(lgp->args.ctx);
7655 dprintk("<-- %s\n", __func__);
7658 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7659 .rpc_call_prepare = nfs4_layoutget_prepare,
7660 .rpc_call_done = nfs4_layoutget_done,
7661 .rpc_release = nfs4_layoutget_release,
7664 struct pnfs_layout_segment *
7665 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
7667 struct inode *inode = lgp->args.inode;
7668 struct nfs_server *server = NFS_SERVER(inode);
7669 size_t max_pages = max_response_pages(server);
7670 struct rpc_task *task;
7671 struct rpc_message msg = {
7672 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7673 .rpc_argp = &lgp->args,
7674 .rpc_resp = &lgp->res,
7675 .rpc_cred = lgp->cred,
7677 struct rpc_task_setup task_setup_data = {
7678 .rpc_client = server->client,
7679 .rpc_message = &msg,
7680 .callback_ops = &nfs4_layoutget_call_ops,
7681 .callback_data = lgp,
7682 .flags = RPC_TASK_ASYNC,
7684 struct pnfs_layout_segment *lseg = NULL;
7687 dprintk("--> %s\n", __func__);
7689 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7690 if (!lgp->args.layout.pages) {
7691 nfs4_layoutget_release(lgp);
7692 return ERR_PTR(-ENOMEM);
7694 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
7695 lgp->args.timestamp = jiffies;
7697 lgp->res.layoutp = &lgp->args.layout;
7698 lgp->res.seq_res.sr_slot = NULL;
7699 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
7701 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7702 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7704 task = rpc_run_task(&task_setup_data);
7706 return ERR_CAST(task);
7707 status = nfs4_wait_for_completion_rpc_task(task);
7709 status = task->tk_status;
7710 trace_nfs4_layoutget(lgp->args.ctx,
7714 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7715 if (status == 0 && lgp->res.layoutp->len)
7716 lseg = pnfs_layout_process(lgp);
7718 dprintk("<-- %s status=%d\n", __func__, status);
7720 return ERR_PTR(status);
7725 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7727 struct nfs4_layoutreturn *lrp = calldata;
7729 dprintk("--> %s\n", __func__);
7730 nfs41_setup_sequence(lrp->clp->cl_session,
7731 &lrp->args.seq_args,
7736 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7738 struct nfs4_layoutreturn *lrp = calldata;
7739 struct nfs_server *server;
7741 dprintk("--> %s\n", __func__);
7743 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
7746 server = NFS_SERVER(lrp->args.inode);
7747 switch (task->tk_status) {
7749 task->tk_status = 0;
7752 case -NFS4ERR_DELAY:
7753 if (nfs4_async_handle_error(task, server, NULL) != -EAGAIN)
7755 rpc_restart_call_prepare(task);
7758 dprintk("<-- %s\n", __func__);
7761 static void nfs4_layoutreturn_release(void *calldata)
7763 struct nfs4_layoutreturn *lrp = calldata;
7764 struct pnfs_layout_hdr *lo = lrp->args.layout;
7766 dprintk("--> %s\n", __func__);
7767 spin_lock(&lo->plh_inode->i_lock);
7768 if (lrp->res.lrs_present)
7769 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7770 lo->plh_block_lgets--;
7771 spin_unlock(&lo->plh_inode->i_lock);
7772 pnfs_put_layout_hdr(lrp->args.layout);
7774 dprintk("<-- %s\n", __func__);
7777 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7778 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7779 .rpc_call_done = nfs4_layoutreturn_done,
7780 .rpc_release = nfs4_layoutreturn_release,
7783 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
7785 struct rpc_task *task;
7786 struct rpc_message msg = {
7787 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7788 .rpc_argp = &lrp->args,
7789 .rpc_resp = &lrp->res,
7790 .rpc_cred = lrp->cred,
7792 struct rpc_task_setup task_setup_data = {
7793 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
7794 .rpc_message = &msg,
7795 .callback_ops = &nfs4_layoutreturn_call_ops,
7796 .callback_data = lrp,
7800 dprintk("--> %s\n", __func__);
7801 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
7802 task = rpc_run_task(&task_setup_data);
7804 return PTR_ERR(task);
7805 status = task->tk_status;
7806 trace_nfs4_layoutreturn(lrp->args.inode, status);
7807 dprintk("<-- %s status=%d\n", __func__, status);
7813 * Retrieve the list of Data Server devices from the MDS.
7815 static int _nfs4_getdevicelist(struct nfs_server *server,
7816 const struct nfs_fh *fh,
7817 struct pnfs_devicelist *devlist)
7819 struct nfs4_getdevicelist_args args = {
7821 .layoutclass = server->pnfs_curr_ld->id,
7823 struct nfs4_getdevicelist_res res = {
7826 struct rpc_message msg = {
7827 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
7833 dprintk("--> %s\n", __func__);
7834 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
7836 dprintk("<-- %s status=%d\n", __func__, status);
7840 int nfs4_proc_getdevicelist(struct nfs_server *server,
7841 const struct nfs_fh *fh,
7842 struct pnfs_devicelist *devlist)
7844 struct nfs4_exception exception = { };
7848 err = nfs4_handle_exception(server,
7849 _nfs4_getdevicelist(server, fh, devlist),
7851 } while (exception.retry);
7853 dprintk("%s: err=%d, num_devs=%u\n", __func__,
7854 err, devlist->num_devs);
7858 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
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) == -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) == -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 = nfs4_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 .call_sync_ops = &nfs40_call_sync_ops,
8422 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8423 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8424 .state_renewal_ops = &nfs40_state_renewal_ops,
8425 .mig_recovery_ops = &nfs40_mig_recovery_ops,
8428 #if defined(CONFIG_NFS_V4_1)
8429 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8431 .init_caps = NFS_CAP_READDIRPLUS
8432 | NFS_CAP_ATOMIC_OPEN
8433 | NFS_CAP_CHANGE_ATTR
8434 | NFS_CAP_POSIX_LOCK
8435 | NFS_CAP_STATEID_NFSV41
8436 | NFS_CAP_ATOMIC_OPEN_V1,
8437 .init_client = nfs41_init_client,
8438 .shutdown_client = nfs41_shutdown_client,
8439 .match_stateid = nfs41_match_stateid,
8440 .find_root_sec = nfs41_find_root_sec,
8441 .free_lock_state = nfs41_free_lock_state,
8442 .call_sync_ops = &nfs41_call_sync_ops,
8443 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8444 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8445 .state_renewal_ops = &nfs41_state_renewal_ops,
8446 .mig_recovery_ops = &nfs41_mig_recovery_ops,
8450 #if defined(CONFIG_NFS_V4_2)
8451 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8453 .init_caps = NFS_CAP_READDIRPLUS
8454 | NFS_CAP_ATOMIC_OPEN
8455 | NFS_CAP_CHANGE_ATTR
8456 | NFS_CAP_POSIX_LOCK
8457 | NFS_CAP_STATEID_NFSV41
8458 | NFS_CAP_ATOMIC_OPEN_V1,
8459 .init_client = nfs41_init_client,
8460 .shutdown_client = nfs41_shutdown_client,
8461 .match_stateid = nfs41_match_stateid,
8462 .find_root_sec = nfs41_find_root_sec,
8463 .free_lock_state = nfs41_free_lock_state,
8464 .call_sync_ops = &nfs41_call_sync_ops,
8465 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8466 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8467 .state_renewal_ops = &nfs41_state_renewal_ops,
8471 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8472 [0] = &nfs_v4_0_minor_ops,
8473 #if defined(CONFIG_NFS_V4_1)
8474 [1] = &nfs_v4_1_minor_ops,
8476 #if defined(CONFIG_NFS_V4_2)
8477 [2] = &nfs_v4_2_minor_ops,
8481 static const struct inode_operations nfs4_dir_inode_operations = {
8482 .create = nfs_create,
8483 .lookup = nfs_lookup,
8484 .atomic_open = nfs_atomic_open,
8486 .unlink = nfs_unlink,
8487 .symlink = nfs_symlink,
8491 .rename = nfs_rename,
8492 .permission = nfs_permission,
8493 .getattr = nfs_getattr,
8494 .setattr = nfs_setattr,
8495 .getxattr = generic_getxattr,
8496 .setxattr = generic_setxattr,
8497 .listxattr = generic_listxattr,
8498 .removexattr = generic_removexattr,
8501 static const struct inode_operations nfs4_file_inode_operations = {
8502 .permission = nfs_permission,
8503 .getattr = nfs_getattr,
8504 .setattr = nfs_setattr,
8505 .getxattr = generic_getxattr,
8506 .setxattr = generic_setxattr,
8507 .listxattr = generic_listxattr,
8508 .removexattr = generic_removexattr,
8511 const struct nfs_rpc_ops nfs_v4_clientops = {
8512 .version = 4, /* protocol version */
8513 .dentry_ops = &nfs4_dentry_operations,
8514 .dir_inode_ops = &nfs4_dir_inode_operations,
8515 .file_inode_ops = &nfs4_file_inode_operations,
8516 .file_ops = &nfs4_file_operations,
8517 .getroot = nfs4_proc_get_root,
8518 .submount = nfs4_submount,
8519 .try_mount = nfs4_try_mount,
8520 .getattr = nfs4_proc_getattr,
8521 .setattr = nfs4_proc_setattr,
8522 .lookup = nfs4_proc_lookup,
8523 .access = nfs4_proc_access,
8524 .readlink = nfs4_proc_readlink,
8525 .create = nfs4_proc_create,
8526 .remove = nfs4_proc_remove,
8527 .unlink_setup = nfs4_proc_unlink_setup,
8528 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
8529 .unlink_done = nfs4_proc_unlink_done,
8530 .rename_setup = nfs4_proc_rename_setup,
8531 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
8532 .rename_done = nfs4_proc_rename_done,
8533 .link = nfs4_proc_link,
8534 .symlink = nfs4_proc_symlink,
8535 .mkdir = nfs4_proc_mkdir,
8536 .rmdir = nfs4_proc_remove,
8537 .readdir = nfs4_proc_readdir,
8538 .mknod = nfs4_proc_mknod,
8539 .statfs = nfs4_proc_statfs,
8540 .fsinfo = nfs4_proc_fsinfo,
8541 .pathconf = nfs4_proc_pathconf,
8542 .set_capabilities = nfs4_server_capabilities,
8543 .decode_dirent = nfs4_decode_dirent,
8544 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
8545 .read_setup = nfs4_proc_read_setup,
8546 .read_done = nfs4_read_done,
8547 .write_setup = nfs4_proc_write_setup,
8548 .write_done = nfs4_write_done,
8549 .commit_setup = nfs4_proc_commit_setup,
8550 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
8551 .commit_done = nfs4_commit_done,
8552 .lock = nfs4_proc_lock,
8553 .clear_acl_cache = nfs4_zap_acl_attr,
8554 .close_context = nfs4_close_context,
8555 .open_context = nfs4_atomic_open,
8556 .have_delegation = nfs4_have_delegation,
8557 .return_delegation = nfs4_inode_return_delegation,
8558 .alloc_client = nfs4_alloc_client,
8559 .init_client = nfs4_init_client,
8560 .free_client = nfs4_free_client,
8561 .create_server = nfs4_create_server,
8562 .clone_server = nfs_clone_server,
8565 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8566 .prefix = XATTR_NAME_NFSV4_ACL,
8567 .list = nfs4_xattr_list_nfs4_acl,
8568 .get = nfs4_xattr_get_nfs4_acl,
8569 .set = nfs4_xattr_set_nfs4_acl,
8572 const struct xattr_handler *nfs4_xattr_handlers[] = {
8573 &nfs4_xattr_nfs4_acl_handler,
8574 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
8575 &nfs4_xattr_nfs4_label_handler,