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 d_drop(opendata->dentry);
2230 d_add(opendata->dentry, NULL);
2231 nfs_set_verifier(opendata->dentry,
2232 nfs_save_change_attribute(opendata->dir->d_inode));
2237 state = nfs4_opendata_to_nfs4_state(opendata);
2238 ret = PTR_ERR(state);
2241 if (server->caps & NFS_CAP_POSIX_LOCK)
2242 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2244 dentry = opendata->dentry;
2245 if (dentry->d_inode == NULL) {
2246 /* FIXME: Is this d_drop() ever needed? */
2248 dentry = d_add_unique(dentry, igrab(state->inode));
2249 if (dentry == NULL) {
2250 dentry = opendata->dentry;
2251 } else if (dentry != ctx->dentry) {
2253 ctx->dentry = dget(dentry);
2255 nfs_set_verifier(dentry,
2256 nfs_save_change_attribute(opendata->dir->d_inode));
2259 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2264 if (dentry->d_inode == state->inode) {
2265 nfs_inode_attach_open_context(ctx);
2266 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2267 nfs4_schedule_stateid_recovery(server, state);
2274 * Returns a referenced nfs4_state
2276 static int _nfs4_do_open(struct inode *dir,
2277 struct nfs_open_context *ctx,
2279 struct iattr *sattr,
2280 struct nfs4_label *label,
2283 struct nfs4_state_owner *sp;
2284 struct nfs4_state *state = NULL;
2285 struct nfs_server *server = NFS_SERVER(dir);
2286 struct nfs4_opendata *opendata;
2287 struct dentry *dentry = ctx->dentry;
2288 struct rpc_cred *cred = ctx->cred;
2289 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2290 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
2291 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
2292 struct nfs4_label *olabel = NULL;
2295 /* Protect against reboot recovery conflicts */
2297 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2299 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2302 status = nfs4_recover_expired_lease(server);
2304 goto err_put_state_owner;
2305 if (dentry->d_inode != NULL)
2306 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
2308 if (dentry->d_inode)
2309 claim = NFS4_OPEN_CLAIM_FH;
2310 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
2311 label, claim, GFP_KERNEL);
2312 if (opendata == NULL)
2313 goto err_put_state_owner;
2316 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2317 if (IS_ERR(olabel)) {
2318 status = PTR_ERR(olabel);
2319 goto err_opendata_put;
2323 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2324 if (!opendata->f_attr.mdsthreshold) {
2325 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2326 if (!opendata->f_attr.mdsthreshold)
2327 goto err_free_label;
2329 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
2331 if (dentry->d_inode != NULL)
2332 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
2334 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
2336 goto err_free_label;
2339 if ((opendata->o_arg.open_flags & O_EXCL) &&
2340 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
2341 nfs4_exclusive_attrset(opendata, sattr);
2343 nfs_fattr_init(opendata->o_res.f_attr);
2344 status = nfs4_do_setattr(state->inode, cred,
2345 opendata->o_res.f_attr, sattr,
2346 state, label, olabel);
2348 nfs_setattr_update_inode(state->inode, sattr);
2349 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2350 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2353 if (opendata->file_created)
2354 *opened |= FILE_CREATED;
2356 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
2357 *ctx_th = opendata->f_attr.mdsthreshold;
2358 opendata->f_attr.mdsthreshold = NULL;
2361 nfs4_label_free(olabel);
2363 nfs4_opendata_put(opendata);
2364 nfs4_put_state_owner(sp);
2367 nfs4_label_free(olabel);
2369 nfs4_opendata_put(opendata);
2370 err_put_state_owner:
2371 nfs4_put_state_owner(sp);
2377 static struct nfs4_state *nfs4_do_open(struct inode *dir,
2378 struct nfs_open_context *ctx,
2380 struct iattr *sattr,
2381 struct nfs4_label *label,
2384 struct nfs_server *server = NFS_SERVER(dir);
2385 struct nfs4_exception exception = { };
2386 struct nfs4_state *res;
2390 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
2392 trace_nfs4_open_file(ctx, flags, status);
2395 /* NOTE: BAD_SEQID means the server and client disagree about the
2396 * book-keeping w.r.t. state-changing operations
2397 * (OPEN/CLOSE/LOCK/LOCKU...)
2398 * It is actually a sign of a bug on the client or on the server.
2400 * If we receive a BAD_SEQID error in the particular case of
2401 * doing an OPEN, we assume that nfs_increment_open_seqid() will
2402 * have unhashed the old state_owner for us, and that we can
2403 * therefore safely retry using a new one. We should still warn
2404 * the user though...
2406 if (status == -NFS4ERR_BAD_SEQID) {
2407 pr_warn_ratelimited("NFS: v4 server %s "
2408 " returned a bad sequence-id error!\n",
2409 NFS_SERVER(dir)->nfs_client->cl_hostname);
2410 exception.retry = 1;
2414 * BAD_STATEID on OPEN means that the server cancelled our
2415 * state before it received the OPEN_CONFIRM.
2416 * Recover by retrying the request as per the discussion
2417 * on Page 181 of RFC3530.
2419 if (status == -NFS4ERR_BAD_STATEID) {
2420 exception.retry = 1;
2423 if (status == -EAGAIN) {
2424 /* We must have found a delegation */
2425 exception.retry = 1;
2428 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2430 res = ERR_PTR(nfs4_handle_exception(server,
2431 status, &exception));
2432 } while (exception.retry);
2436 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2437 struct nfs_fattr *fattr, struct iattr *sattr,
2438 struct nfs4_state *state, struct nfs4_label *ilabel,
2439 struct nfs4_label *olabel)
2441 struct nfs_server *server = NFS_SERVER(inode);
2442 struct nfs_setattrargs arg = {
2443 .fh = NFS_FH(inode),
2446 .bitmask = server->attr_bitmask,
2449 struct nfs_setattrres res = {
2454 struct rpc_message msg = {
2455 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2460 unsigned long timestamp = jiffies;
2465 arg.bitmask = nfs4_bitmask(server, ilabel);
2467 arg.bitmask = nfs4_bitmask(server, olabel);
2469 nfs_fattr_init(fattr);
2471 /* Servers should only apply open mode checks for file size changes */
2472 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2473 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2475 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2476 /* Use that stateid */
2477 } else if (truncate && state != NULL) {
2478 struct nfs_lockowner lockowner = {
2479 .l_owner = current->files,
2480 .l_pid = current->tgid,
2482 if (!nfs4_valid_open_stateid(state))
2484 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2485 &lockowner) == -EIO)
2488 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
2490 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2491 if (status == 0 && state != NULL)
2492 renew_lease(server, timestamp);
2496 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2497 struct nfs_fattr *fattr, struct iattr *sattr,
2498 struct nfs4_state *state, struct nfs4_label *ilabel,
2499 struct nfs4_label *olabel)
2501 struct nfs_server *server = NFS_SERVER(inode);
2502 struct nfs4_exception exception = {
2508 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
2509 trace_nfs4_setattr(inode, err);
2511 case -NFS4ERR_OPENMODE:
2512 if (!(sattr->ia_valid & ATTR_SIZE)) {
2513 pr_warn_once("NFSv4: server %s is incorrectly "
2514 "applying open mode checks to "
2515 "a SETATTR that is not "
2516 "changing file size.\n",
2517 server->nfs_client->cl_hostname);
2519 if (state && !(state->state & FMODE_WRITE)) {
2521 if (sattr->ia_valid & ATTR_OPEN)
2526 err = nfs4_handle_exception(server, err, &exception);
2527 } while (exception.retry);
2532 struct nfs4_closedata {
2533 struct inode *inode;
2534 struct nfs4_state *state;
2535 struct nfs_closeargs arg;
2536 struct nfs_closeres res;
2537 struct nfs_fattr fattr;
2538 unsigned long timestamp;
2543 static void nfs4_free_closedata(void *data)
2545 struct nfs4_closedata *calldata = data;
2546 struct nfs4_state_owner *sp = calldata->state->owner;
2547 struct super_block *sb = calldata->state->inode->i_sb;
2550 pnfs_roc_release(calldata->state->inode);
2551 nfs4_put_open_state(calldata->state);
2552 nfs_free_seqid(calldata->arg.seqid);
2553 nfs4_put_state_owner(sp);
2554 nfs_sb_deactive(sb);
2558 static void nfs4_close_done(struct rpc_task *task, void *data)
2560 struct nfs4_closedata *calldata = data;
2561 struct nfs4_state *state = calldata->state;
2562 struct nfs_server *server = NFS_SERVER(calldata->inode);
2563 nfs4_stateid *res_stateid = NULL;
2565 dprintk("%s: begin!\n", __func__);
2566 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2568 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
2569 /* hmm. we are done with the inode, and in the process of freeing
2570 * the state_owner. we keep this around to process errors
2572 switch (task->tk_status) {
2574 res_stateid = &calldata->res.stateid;
2575 if (calldata->arg.fmode == 0 && calldata->roc)
2576 pnfs_roc_set_barrier(state->inode,
2577 calldata->roc_barrier);
2578 renew_lease(server, calldata->timestamp);
2580 case -NFS4ERR_ADMIN_REVOKED:
2581 case -NFS4ERR_STALE_STATEID:
2582 case -NFS4ERR_OLD_STATEID:
2583 case -NFS4ERR_BAD_STATEID:
2584 case -NFS4ERR_EXPIRED:
2585 if (calldata->arg.fmode == 0)
2588 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
2589 rpc_restart_call_prepare(task);
2593 nfs_clear_open_stateid(state, res_stateid, calldata->arg.fmode);
2595 nfs_release_seqid(calldata->arg.seqid);
2596 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2597 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2600 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2602 struct nfs4_closedata *calldata = data;
2603 struct nfs4_state *state = calldata->state;
2604 struct inode *inode = calldata->inode;
2605 bool is_rdonly, is_wronly, is_rdwr;
2608 dprintk("%s: begin!\n", __func__);
2609 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2612 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2613 spin_lock(&state->owner->so_lock);
2614 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2615 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2616 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
2617 /* Calculate the current open share mode */
2618 calldata->arg.fmode = 0;
2619 if (is_rdonly || is_rdwr)
2620 calldata->arg.fmode |= FMODE_READ;
2621 if (is_wronly || is_rdwr)
2622 calldata->arg.fmode |= FMODE_WRITE;
2623 /* Calculate the change in open mode */
2624 if (state->n_rdwr == 0) {
2625 if (state->n_rdonly == 0) {
2626 call_close |= is_rdonly || is_rdwr;
2627 calldata->arg.fmode &= ~FMODE_READ;
2629 if (state->n_wronly == 0) {
2630 call_close |= is_wronly || is_rdwr;
2631 calldata->arg.fmode &= ~FMODE_WRITE;
2634 if (!nfs4_valid_open_stateid(state))
2636 spin_unlock(&state->owner->so_lock);
2639 /* Note: exit _without_ calling nfs4_close_done */
2643 if (calldata->arg.fmode == 0) {
2644 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2645 if (calldata->roc &&
2646 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2647 nfs_release_seqid(calldata->arg.seqid);
2652 nfs_fattr_init(calldata->res.fattr);
2653 calldata->timestamp = jiffies;
2654 if (nfs4_setup_sequence(NFS_SERVER(inode),
2655 &calldata->arg.seq_args,
2656 &calldata->res.seq_res,
2658 nfs_release_seqid(calldata->arg.seqid);
2659 dprintk("%s: done!\n", __func__);
2662 task->tk_action = NULL;
2664 nfs4_sequence_done(task, &calldata->res.seq_res);
2667 static const struct rpc_call_ops nfs4_close_ops = {
2668 .rpc_call_prepare = nfs4_close_prepare,
2669 .rpc_call_done = nfs4_close_done,
2670 .rpc_release = nfs4_free_closedata,
2673 static bool nfs4_state_has_opener(struct nfs4_state *state)
2675 /* first check existing openers */
2676 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 &&
2677 state->n_rdonly != 0)
2680 if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 &&
2681 state->n_wronly != 0)
2684 if (test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 &&
2691 static bool nfs4_roc(struct inode *inode)
2693 struct nfs_inode *nfsi = NFS_I(inode);
2694 struct nfs_open_context *ctx;
2695 struct nfs4_state *state;
2697 spin_lock(&inode->i_lock);
2698 list_for_each_entry(ctx, &nfsi->open_files, list) {
2702 if (nfs4_state_has_opener(state)) {
2703 spin_unlock(&inode->i_lock);
2707 spin_unlock(&inode->i_lock);
2709 if (nfs4_check_delegation(inode, FMODE_READ))
2712 return pnfs_roc(inode);
2716 * It is possible for data to be read/written from a mem-mapped file
2717 * after the sys_close call (which hits the vfs layer as a flush).
2718 * This means that we can't safely call nfsv4 close on a file until
2719 * the inode is cleared. This in turn means that we are not good
2720 * NFSv4 citizens - we do not indicate to the server to update the file's
2721 * share state even when we are done with one of the three share
2722 * stateid's in the inode.
2724 * NOTE: Caller must be holding the sp->so_owner semaphore!
2726 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
2728 struct nfs_server *server = NFS_SERVER(state->inode);
2729 struct nfs4_closedata *calldata;
2730 struct nfs4_state_owner *sp = state->owner;
2731 struct rpc_task *task;
2732 struct rpc_message msg = {
2733 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2734 .rpc_cred = state->owner->so_cred,
2736 struct rpc_task_setup task_setup_data = {
2737 .rpc_client = server->client,
2738 .rpc_message = &msg,
2739 .callback_ops = &nfs4_close_ops,
2740 .workqueue = nfsiod_workqueue,
2741 .flags = RPC_TASK_ASYNC,
2743 int status = -ENOMEM;
2745 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2746 &task_setup_data.rpc_client, &msg);
2748 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2749 if (calldata == NULL)
2751 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2752 calldata->inode = state->inode;
2753 calldata->state = state;
2754 calldata->arg.fh = NFS_FH(state->inode);
2755 calldata->arg.stateid = &state->open_stateid;
2756 /* Serialization for the sequence id */
2757 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2758 if (calldata->arg.seqid == NULL)
2759 goto out_free_calldata;
2760 calldata->arg.fmode = 0;
2761 calldata->arg.bitmask = server->cache_consistency_bitmask;
2762 calldata->res.fattr = &calldata->fattr;
2763 calldata->res.seqid = calldata->arg.seqid;
2764 calldata->res.server = server;
2765 calldata->roc = nfs4_roc(state->inode);
2766 nfs_sb_active(calldata->inode->i_sb);
2768 msg.rpc_argp = &calldata->arg;
2769 msg.rpc_resp = &calldata->res;
2770 task_setup_data.callback_data = calldata;
2771 task = rpc_run_task(&task_setup_data);
2773 return PTR_ERR(task);
2776 status = rpc_wait_for_completion_task(task);
2782 nfs4_put_open_state(state);
2783 nfs4_put_state_owner(sp);
2787 static struct inode *
2788 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2789 int open_flags, struct iattr *attr, int *opened)
2791 struct nfs4_state *state;
2792 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2794 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
2796 /* Protect against concurrent sillydeletes */
2797 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
2799 nfs4_label_release_security(label);
2802 return ERR_CAST(state);
2803 return state->inode;
2806 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2808 if (ctx->state == NULL)
2811 nfs4_close_sync(ctx->state, ctx->mode);
2813 nfs4_close_state(ctx->state, ctx->mode);
2816 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2817 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
2818 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
2820 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2822 struct nfs4_server_caps_arg args = {
2825 struct nfs4_server_caps_res res = {};
2826 struct rpc_message msg = {
2827 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2833 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2835 /* Sanity check the server answers */
2836 switch (server->nfs_client->cl_minorversion) {
2838 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2839 res.attr_bitmask[2] = 0;
2842 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2845 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2847 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2848 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2849 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2850 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2851 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2852 NFS_CAP_CTIME|NFS_CAP_MTIME|
2853 NFS_CAP_SECURITY_LABEL);
2854 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2855 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2856 server->caps |= NFS_CAP_ACLS;
2857 if (res.has_links != 0)
2858 server->caps |= NFS_CAP_HARDLINKS;
2859 if (res.has_symlinks != 0)
2860 server->caps |= NFS_CAP_SYMLINKS;
2861 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2862 server->caps |= NFS_CAP_FILEID;
2863 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2864 server->caps |= NFS_CAP_MODE;
2865 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2866 server->caps |= NFS_CAP_NLINK;
2867 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2868 server->caps |= NFS_CAP_OWNER;
2869 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2870 server->caps |= NFS_CAP_OWNER_GROUP;
2871 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2872 server->caps |= NFS_CAP_ATIME;
2873 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2874 server->caps |= NFS_CAP_CTIME;
2875 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2876 server->caps |= NFS_CAP_MTIME;
2877 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
2878 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2879 server->caps |= NFS_CAP_SECURITY_LABEL;
2881 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2882 sizeof(server->attr_bitmask));
2883 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2885 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2886 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2887 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2888 server->cache_consistency_bitmask[2] = 0;
2889 server->acl_bitmask = res.acl_bitmask;
2890 server->fh_expire_type = res.fh_expire_type;
2896 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2898 struct nfs4_exception exception = { };
2901 err = nfs4_handle_exception(server,
2902 _nfs4_server_capabilities(server, fhandle),
2904 } while (exception.retry);
2908 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2909 struct nfs_fsinfo *info)
2912 struct nfs4_lookup_root_arg args = {
2915 struct nfs4_lookup_res res = {
2917 .fattr = info->fattr,
2920 struct rpc_message msg = {
2921 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2926 bitmask[0] = nfs4_fattr_bitmap[0];
2927 bitmask[1] = nfs4_fattr_bitmap[1];
2929 * Process the label in the upcoming getfattr
2931 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2933 nfs_fattr_init(info->fattr);
2934 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2937 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2938 struct nfs_fsinfo *info)
2940 struct nfs4_exception exception = { };
2943 err = _nfs4_lookup_root(server, fhandle, info);
2944 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
2947 case -NFS4ERR_WRONGSEC:
2950 err = nfs4_handle_exception(server, err, &exception);
2952 } while (exception.retry);
2957 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2958 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2960 struct rpc_auth_create_args auth_args = {
2961 .pseudoflavor = flavor,
2963 struct rpc_auth *auth;
2966 auth = rpcauth_create(&auth_args, server->client);
2971 ret = nfs4_lookup_root(server, fhandle, info);
2977 * Retry pseudoroot lookup with various security flavors. We do this when:
2979 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2980 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2982 * Returns zero on success, or a negative NFS4ERR value, or a
2983 * negative errno value.
2985 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2986 struct nfs_fsinfo *info)
2988 /* Per 3530bis 15.33.5 */
2989 static const rpc_authflavor_t flav_array[] = {
2993 RPC_AUTH_UNIX, /* courtesy */
2996 int status = -EPERM;
2999 if (server->auth_info.flavor_len > 0) {
3000 /* try each flavor specified by user */
3001 for (i = 0; i < server->auth_info.flavor_len; i++) {
3002 status = nfs4_lookup_root_sec(server, fhandle, info,
3003 server->auth_info.flavors[i]);
3004 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3009 /* no flavors specified by user, try default list */
3010 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3011 status = nfs4_lookup_root_sec(server, fhandle, info,
3013 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3020 * -EACCESS could mean that the user doesn't have correct permissions
3021 * to access the mount. It could also mean that we tried to mount
3022 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3023 * existing mount programs don't handle -EACCES very well so it should
3024 * be mapped to -EPERM instead.
3026 if (status == -EACCES)
3031 static int nfs4_do_find_root_sec(struct nfs_server *server,
3032 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3034 int mv = server->nfs_client->cl_minorversion;
3035 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3039 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3040 * @server: initialized nfs_server handle
3041 * @fhandle: we fill in the pseudo-fs root file handle
3042 * @info: we fill in an FSINFO struct
3043 * @auth_probe: probe the auth flavours
3045 * Returns zero on success, or a negative errno.
3047 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
3048 struct nfs_fsinfo *info,
3053 switch (auth_probe) {
3055 status = nfs4_lookup_root(server, fhandle, info);
3056 if (status != -NFS4ERR_WRONGSEC)
3059 status = nfs4_do_find_root_sec(server, fhandle, info);
3063 status = nfs4_server_capabilities(server, fhandle);
3065 status = nfs4_do_fsinfo(server, fhandle, info);
3067 return nfs4_map_errors(status);
3070 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3071 struct nfs_fsinfo *info)
3074 struct nfs_fattr *fattr = info->fattr;
3075 struct nfs4_label *label = NULL;
3077 error = nfs4_server_capabilities(server, mntfh);
3079 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3083 label = nfs4_label_alloc(server, GFP_KERNEL);
3085 return PTR_ERR(label);
3087 error = nfs4_proc_getattr(server, mntfh, fattr, label);
3089 dprintk("nfs4_get_root: getattr error = %d\n", -error);
3090 goto err_free_label;
3093 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3094 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3095 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3098 nfs4_label_free(label);
3104 * Get locations and (maybe) other attributes of a referral.
3105 * Note that we'll actually follow the referral later when
3106 * we detect fsid mismatch in inode revalidation
3108 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3109 const struct qstr *name, struct nfs_fattr *fattr,
3110 struct nfs_fh *fhandle)
3112 int status = -ENOMEM;
3113 struct page *page = NULL;
3114 struct nfs4_fs_locations *locations = NULL;
3116 page = alloc_page(GFP_KERNEL);
3119 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3120 if (locations == NULL)
3123 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
3128 * If the fsid didn't change, this is a migration event, not a
3129 * referral. Cause us to drop into the exception handler, which
3130 * will kick off migration recovery.
3132 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3133 dprintk("%s: server did not return a different fsid for"
3134 " a referral at %s\n", __func__, name->name);
3135 status = -NFS4ERR_MOVED;
3138 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3139 nfs_fixup_referral_attributes(&locations->fattr);
3141 /* replace the lookup nfs_fattr with the locations nfs_fattr */
3142 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
3143 memset(fhandle, 0, sizeof(struct nfs_fh));
3151 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3152 struct nfs_fattr *fattr, struct nfs4_label *label)
3154 struct nfs4_getattr_arg args = {
3156 .bitmask = server->attr_bitmask,
3158 struct nfs4_getattr_res res = {
3163 struct rpc_message msg = {
3164 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3169 args.bitmask = nfs4_bitmask(server, label);
3171 nfs_fattr_init(fattr);
3172 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3175 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3176 struct nfs_fattr *fattr, struct nfs4_label *label)
3178 struct nfs4_exception exception = { };
3181 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3182 trace_nfs4_getattr(server, fhandle, fattr, err);
3183 err = nfs4_handle_exception(server, err,
3185 } while (exception.retry);
3190 * The file is not closed if it is opened due to the a request to change
3191 * the size of the file. The open call will not be needed once the
3192 * VFS layer lookup-intents are implemented.
3194 * Close is called when the inode is destroyed.
3195 * If we haven't opened the file for O_WRONLY, we
3196 * need to in the size_change case to obtain a stateid.
3199 * Because OPEN is always done by name in nfsv4, it is
3200 * possible that we opened a different file by the same
3201 * name. We can recognize this race condition, but we
3202 * can't do anything about it besides returning an error.
3204 * This will be fixed with VFS changes (lookup-intent).
3207 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3208 struct iattr *sattr)
3210 struct inode *inode = dentry->d_inode;
3211 struct rpc_cred *cred = NULL;
3212 struct nfs4_state *state = NULL;
3213 struct nfs4_label *label = NULL;
3216 if (pnfs_ld_layoutret_on_setattr(inode))
3217 pnfs_commit_and_return_layout(inode);
3219 nfs_fattr_init(fattr);
3221 /* Deal with open(O_TRUNC) */
3222 if (sattr->ia_valid & ATTR_OPEN)
3223 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
3225 /* Optimization: if the end result is no change, don't RPC */
3226 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
3229 /* Search for an existing open(O_WRITE) file */
3230 if (sattr->ia_valid & ATTR_FILE) {
3231 struct nfs_open_context *ctx;
3233 ctx = nfs_file_open_context(sattr->ia_file);
3240 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3242 return PTR_ERR(label);
3244 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
3246 nfs_setattr_update_inode(inode, sattr);
3247 nfs_setsecurity(inode, fattr, label);
3249 nfs4_label_free(label);
3253 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3254 const struct qstr *name, struct nfs_fh *fhandle,
3255 struct nfs_fattr *fattr, struct nfs4_label *label)
3257 struct nfs_server *server = NFS_SERVER(dir);
3259 struct nfs4_lookup_arg args = {
3260 .bitmask = server->attr_bitmask,
3261 .dir_fh = NFS_FH(dir),
3264 struct nfs4_lookup_res res = {
3270 struct rpc_message msg = {
3271 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3276 args.bitmask = nfs4_bitmask(server, label);
3278 nfs_fattr_init(fattr);
3280 dprintk("NFS call lookup %s\n", name->name);
3281 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
3282 dprintk("NFS reply lookup: %d\n", status);
3286 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
3288 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
3289 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
3290 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3294 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3295 struct qstr *name, struct nfs_fh *fhandle,
3296 struct nfs_fattr *fattr, struct nfs4_label *label)
3298 struct nfs4_exception exception = { };
3299 struct rpc_clnt *client = *clnt;
3302 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
3303 trace_nfs4_lookup(dir, name, err);
3305 case -NFS4ERR_BADNAME:
3308 case -NFS4ERR_MOVED:
3309 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
3311 case -NFS4ERR_WRONGSEC:
3313 if (client != *clnt)
3315 client = nfs4_negotiate_security(client, dir, name);
3317 return PTR_ERR(client);
3319 exception.retry = 1;
3322 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3324 } while (exception.retry);
3329 else if (client != *clnt)
3330 rpc_shutdown_client(client);
3335 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
3336 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3337 struct nfs4_label *label)
3340 struct rpc_clnt *client = NFS_CLIENT(dir);
3342 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
3343 if (client != NFS_CLIENT(dir)) {
3344 rpc_shutdown_client(client);
3345 nfs_fixup_secinfo_attributes(fattr);
3351 nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3352 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3354 struct rpc_clnt *client = NFS_CLIENT(dir);
3357 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
3359 return ERR_PTR(status);
3360 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
3363 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3365 struct nfs_server *server = NFS_SERVER(inode);
3366 struct nfs4_accessargs args = {
3367 .fh = NFS_FH(inode),
3368 .bitmask = server->cache_consistency_bitmask,
3370 struct nfs4_accessres res = {
3373 struct rpc_message msg = {
3374 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3377 .rpc_cred = entry->cred,
3379 int mode = entry->mask;
3383 * Determine which access bits we want to ask for...
3385 if (mode & MAY_READ)
3386 args.access |= NFS4_ACCESS_READ;
3387 if (S_ISDIR(inode->i_mode)) {
3388 if (mode & MAY_WRITE)
3389 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3390 if (mode & MAY_EXEC)
3391 args.access |= NFS4_ACCESS_LOOKUP;
3393 if (mode & MAY_WRITE)
3394 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3395 if (mode & MAY_EXEC)
3396 args.access |= NFS4_ACCESS_EXECUTE;
3399 res.fattr = nfs_alloc_fattr();
3400 if (res.fattr == NULL)
3403 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3405 nfs_access_set_mask(entry, res.access);
3406 nfs_refresh_inode(inode, res.fattr);
3408 nfs_free_fattr(res.fattr);
3412 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3414 struct nfs4_exception exception = { };
3417 err = _nfs4_proc_access(inode, entry);
3418 trace_nfs4_access(inode, err);
3419 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3421 } while (exception.retry);
3426 * TODO: For the time being, we don't try to get any attributes
3427 * along with any of the zero-copy operations READ, READDIR,
3430 * In the case of the first three, we want to put the GETATTR
3431 * after the read-type operation -- this is because it is hard
3432 * to predict the length of a GETATTR response in v4, and thus
3433 * align the READ data correctly. This means that the GETATTR
3434 * may end up partially falling into the page cache, and we should
3435 * shift it into the 'tail' of the xdr_buf before processing.
3436 * To do this efficiently, we need to know the total length
3437 * of data received, which doesn't seem to be available outside
3440 * In the case of WRITE, we also want to put the GETATTR after
3441 * the operation -- in this case because we want to make sure
3442 * we get the post-operation mtime and size.
3444 * Both of these changes to the XDR layer would in fact be quite
3445 * minor, but I decided to leave them for a subsequent patch.
3447 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3448 unsigned int pgbase, unsigned int pglen)
3450 struct nfs4_readlink args = {
3451 .fh = NFS_FH(inode),
3456 struct nfs4_readlink_res res;
3457 struct rpc_message msg = {
3458 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3463 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
3466 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3467 unsigned int pgbase, unsigned int pglen)
3469 struct nfs4_exception exception = { };
3472 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3473 trace_nfs4_readlink(inode, err);
3474 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3476 } while (exception.retry);
3481 * This is just for mknod. open(O_CREAT) will always do ->open_context().
3484 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
3487 struct nfs4_label l, *ilabel = NULL;
3488 struct nfs_open_context *ctx;
3489 struct nfs4_state *state;
3493 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3495 return PTR_ERR(ctx);
3497 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3499 sattr->ia_mode &= ~current_umask();
3500 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
3501 if (IS_ERR(state)) {
3502 status = PTR_ERR(state);
3506 nfs4_label_release_security(ilabel);
3507 put_nfs_open_context(ctx);
3511 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3513 struct nfs_server *server = NFS_SERVER(dir);
3514 struct nfs_removeargs args = {
3518 struct nfs_removeres res = {
3521 struct rpc_message msg = {
3522 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3528 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
3530 update_changeattr(dir, &res.cinfo);
3534 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3536 struct nfs4_exception exception = { };
3539 err = _nfs4_proc_remove(dir, name);
3540 trace_nfs4_remove(dir, name, err);
3541 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3543 } while (exception.retry);
3547 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
3549 struct nfs_server *server = NFS_SERVER(dir);
3550 struct nfs_removeargs *args = msg->rpc_argp;
3551 struct nfs_removeres *res = msg->rpc_resp;
3553 res->server = server;
3554 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
3555 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
3557 nfs_fattr_init(res->dir_attr);
3560 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3562 nfs4_setup_sequence(NFS_SERVER(data->dir),
3563 &data->args.seq_args,
3568 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
3570 struct nfs_unlinkdata *data = task->tk_calldata;
3571 struct nfs_removeres *res = &data->res;
3573 if (!nfs4_sequence_done(task, &res->seq_res))
3575 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3577 update_changeattr(dir, &res->cinfo);
3581 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3583 struct nfs_server *server = NFS_SERVER(dir);
3584 struct nfs_renameargs *arg = msg->rpc_argp;
3585 struct nfs_renameres *res = msg->rpc_resp;
3587 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
3588 res->server = server;
3589 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
3592 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3594 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3595 &data->args.seq_args,
3600 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3601 struct inode *new_dir)
3603 struct nfs_renamedata *data = task->tk_calldata;
3604 struct nfs_renameres *res = &data->res;
3606 if (!nfs4_sequence_done(task, &res->seq_res))
3608 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3611 update_changeattr(old_dir, &res->old_cinfo);
3612 update_changeattr(new_dir, &res->new_cinfo);
3616 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3618 struct nfs_server *server = NFS_SERVER(inode);
3619 struct nfs4_link_arg arg = {
3620 .fh = NFS_FH(inode),
3621 .dir_fh = NFS_FH(dir),
3623 .bitmask = server->attr_bitmask,
3625 struct nfs4_link_res res = {
3629 struct rpc_message msg = {
3630 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3634 int status = -ENOMEM;
3636 res.fattr = nfs_alloc_fattr();
3637 if (res.fattr == NULL)
3640 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3641 if (IS_ERR(res.label)) {
3642 status = PTR_ERR(res.label);
3645 arg.bitmask = nfs4_bitmask(server, res.label);
3647 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3649 update_changeattr(dir, &res.cinfo);
3650 status = nfs_post_op_update_inode(inode, res.fattr);
3652 nfs_setsecurity(inode, res.fattr, res.label);
3656 nfs4_label_free(res.label);
3659 nfs_free_fattr(res.fattr);
3663 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3665 struct nfs4_exception exception = { };
3668 err = nfs4_handle_exception(NFS_SERVER(inode),
3669 _nfs4_proc_link(inode, dir, name),
3671 } while (exception.retry);
3675 struct nfs4_createdata {
3676 struct rpc_message msg;
3677 struct nfs4_create_arg arg;
3678 struct nfs4_create_res res;
3680 struct nfs_fattr fattr;
3681 struct nfs4_label *label;
3684 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3685 struct qstr *name, struct iattr *sattr, u32 ftype)
3687 struct nfs4_createdata *data;
3689 data = kzalloc(sizeof(*data), GFP_KERNEL);
3691 struct nfs_server *server = NFS_SERVER(dir);
3693 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3694 if (IS_ERR(data->label))
3697 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3698 data->msg.rpc_argp = &data->arg;
3699 data->msg.rpc_resp = &data->res;
3700 data->arg.dir_fh = NFS_FH(dir);
3701 data->arg.server = server;
3702 data->arg.name = name;
3703 data->arg.attrs = sattr;
3704 data->arg.ftype = ftype;
3705 data->arg.bitmask = nfs4_bitmask(server, data->label);
3706 data->res.server = server;
3707 data->res.fh = &data->fh;
3708 data->res.fattr = &data->fattr;
3709 data->res.label = data->label;
3710 nfs_fattr_init(data->res.fattr);
3718 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3720 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3721 &data->arg.seq_args, &data->res.seq_res, 1);
3723 update_changeattr(dir, &data->res.dir_cinfo);
3724 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
3729 static void nfs4_free_createdata(struct nfs4_createdata *data)
3731 nfs4_label_free(data->label);
3735 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3736 struct page *page, unsigned int len, struct iattr *sattr,
3737 struct nfs4_label *label)
3739 struct nfs4_createdata *data;
3740 int status = -ENAMETOOLONG;
3742 if (len > NFS4_MAXPATHLEN)
3746 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3750 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3751 data->arg.u.symlink.pages = &page;
3752 data->arg.u.symlink.len = len;
3753 data->arg.label = label;
3755 status = nfs4_do_create(dir, dentry, data);
3757 nfs4_free_createdata(data);
3762 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3763 struct page *page, unsigned int len, struct iattr *sattr)
3765 struct nfs4_exception exception = { };
3766 struct nfs4_label l, *label = NULL;
3769 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3772 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3773 trace_nfs4_symlink(dir, &dentry->d_name, err);
3774 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3776 } while (exception.retry);
3778 nfs4_label_release_security(label);
3782 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3783 struct iattr *sattr, struct nfs4_label *label)
3785 struct nfs4_createdata *data;
3786 int status = -ENOMEM;
3788 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3792 data->arg.label = label;
3793 status = nfs4_do_create(dir, dentry, data);
3795 nfs4_free_createdata(data);
3800 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3801 struct iattr *sattr)
3803 struct nfs4_exception exception = { };
3804 struct nfs4_label l, *label = NULL;
3807 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3809 sattr->ia_mode &= ~current_umask();
3811 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3812 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3813 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3815 } while (exception.retry);
3816 nfs4_label_release_security(label);
3821 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3822 u64 cookie, struct page **pages, unsigned int count, int plus)
3824 struct inode *dir = dentry->d_inode;
3825 struct nfs4_readdir_arg args = {
3830 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3833 struct nfs4_readdir_res res;
3834 struct rpc_message msg = {
3835 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3842 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3844 (unsigned long long)cookie);
3845 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
3846 res.pgbase = args.pgbase;
3847 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3849 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
3850 status += args.pgbase;
3853 nfs_invalidate_atime(dir);
3855 dprintk("%s: returns %d\n", __func__, status);
3859 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3860 u64 cookie, struct page **pages, unsigned int count, int plus)
3862 struct nfs4_exception exception = { };
3865 err = _nfs4_proc_readdir(dentry, cred, cookie,
3866 pages, count, plus);
3867 trace_nfs4_readdir(dentry->d_inode, err);
3868 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
3870 } while (exception.retry);
3874 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3875 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
3877 struct nfs4_createdata *data;
3878 int mode = sattr->ia_mode;
3879 int status = -ENOMEM;
3881 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3886 data->arg.ftype = NF4FIFO;
3887 else if (S_ISBLK(mode)) {
3888 data->arg.ftype = NF4BLK;
3889 data->arg.u.device.specdata1 = MAJOR(rdev);
3890 data->arg.u.device.specdata2 = MINOR(rdev);
3892 else if (S_ISCHR(mode)) {
3893 data->arg.ftype = NF4CHR;
3894 data->arg.u.device.specdata1 = MAJOR(rdev);
3895 data->arg.u.device.specdata2 = MINOR(rdev);
3896 } else if (!S_ISSOCK(mode)) {
3901 data->arg.label = label;
3902 status = nfs4_do_create(dir, dentry, data);
3904 nfs4_free_createdata(data);
3909 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3910 struct iattr *sattr, dev_t rdev)
3912 struct nfs4_exception exception = { };
3913 struct nfs4_label l, *label = NULL;
3916 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3918 sattr->ia_mode &= ~current_umask();
3920 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3921 trace_nfs4_mknod(dir, &dentry->d_name, err);
3922 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3924 } while (exception.retry);
3926 nfs4_label_release_security(label);
3931 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3932 struct nfs_fsstat *fsstat)
3934 struct nfs4_statfs_arg args = {
3936 .bitmask = server->attr_bitmask,
3938 struct nfs4_statfs_res res = {
3941 struct rpc_message msg = {
3942 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3947 nfs_fattr_init(fsstat->fattr);
3948 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3951 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3953 struct nfs4_exception exception = { };
3956 err = nfs4_handle_exception(server,
3957 _nfs4_proc_statfs(server, fhandle, fsstat),
3959 } while (exception.retry);
3963 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3964 struct nfs_fsinfo *fsinfo)
3966 struct nfs4_fsinfo_arg args = {
3968 .bitmask = server->attr_bitmask,
3970 struct nfs4_fsinfo_res res = {
3973 struct rpc_message msg = {
3974 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3979 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3982 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3984 struct nfs4_exception exception = { };
3985 unsigned long now = jiffies;
3989 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
3990 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
3992 struct nfs_client *clp = server->nfs_client;
3994 spin_lock(&clp->cl_lock);
3995 clp->cl_lease_time = fsinfo->lease_time * HZ;
3996 clp->cl_last_renewal = now;
3997 spin_unlock(&clp->cl_lock);
4000 err = nfs4_handle_exception(server, err, &exception);
4001 } while (exception.retry);
4005 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4009 nfs_fattr_init(fsinfo->fattr);
4010 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
4012 /* block layout checks this! */
4013 server->pnfs_blksize = fsinfo->blksize;
4014 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
4020 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4021 struct nfs_pathconf *pathconf)
4023 struct nfs4_pathconf_arg args = {
4025 .bitmask = server->attr_bitmask,
4027 struct nfs4_pathconf_res res = {
4028 .pathconf = pathconf,
4030 struct rpc_message msg = {
4031 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4036 /* None of the pathconf attributes are mandatory to implement */
4037 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4038 memset(pathconf, 0, sizeof(*pathconf));
4042 nfs_fattr_init(pathconf->fattr);
4043 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4046 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4047 struct nfs_pathconf *pathconf)
4049 struct nfs4_exception exception = { };
4053 err = nfs4_handle_exception(server,
4054 _nfs4_proc_pathconf(server, fhandle, pathconf),
4056 } while (exception.retry);
4060 int nfs4_set_rw_stateid(nfs4_stateid *stateid,
4061 const struct nfs_open_context *ctx,
4062 const struct nfs_lock_context *l_ctx,
4065 const struct nfs_lockowner *lockowner = NULL;
4068 lockowner = &l_ctx->lockowner;
4069 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
4071 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4073 static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4074 const struct nfs_open_context *ctx,
4075 const struct nfs_lock_context *l_ctx,
4078 nfs4_stateid current_stateid;
4080 /* If the current stateid represents a lost lock, then exit */
4081 if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode) == -EIO)
4083 return nfs4_stateid_match(stateid, ¤t_stateid);
4086 static bool nfs4_error_stateid_expired(int err)
4089 case -NFS4ERR_DELEG_REVOKED:
4090 case -NFS4ERR_ADMIN_REVOKED:
4091 case -NFS4ERR_BAD_STATEID:
4092 case -NFS4ERR_STALE_STATEID:
4093 case -NFS4ERR_OLD_STATEID:
4094 case -NFS4ERR_OPENMODE:
4095 case -NFS4ERR_EXPIRED:
4101 void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
4103 nfs_invalidate_atime(hdr->inode);
4106 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
4108 struct nfs_server *server = NFS_SERVER(hdr->inode);
4110 trace_nfs4_read(hdr, task->tk_status);
4111 if (nfs4_async_handle_error(task, server,
4112 hdr->args.context->state) == -EAGAIN) {
4113 rpc_restart_call_prepare(task);
4117 __nfs4_read_done_cb(hdr);
4118 if (task->tk_status > 0)
4119 renew_lease(server, hdr->timestamp);
4123 static bool nfs4_read_stateid_changed(struct rpc_task *task,
4124 struct nfs_pgio_args *args)
4127 if (!nfs4_error_stateid_expired(task->tk_status) ||
4128 nfs4_stateid_is_current(&args->stateid,
4133 rpc_restart_call_prepare(task);
4137 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4140 dprintk("--> %s\n", __func__);
4142 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4144 if (nfs4_read_stateid_changed(task, &hdr->args))
4146 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4147 nfs4_read_done_cb(task, hdr);
4150 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4151 struct rpc_message *msg)
4153 hdr->timestamp = jiffies;
4154 hdr->pgio_done_cb = nfs4_read_done_cb;
4155 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
4156 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
4159 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4160 struct nfs_pgio_header *hdr)
4162 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4163 &hdr->args.seq_args,
4167 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4168 hdr->args.lock_context,
4169 hdr->rw_ops->rw_mode) == -EIO)
4171 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
4176 static int nfs4_write_done_cb(struct rpc_task *task,
4177 struct nfs_pgio_header *hdr)
4179 struct inode *inode = hdr->inode;
4181 trace_nfs4_write(hdr, task->tk_status);
4182 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4183 hdr->args.context->state) == -EAGAIN) {
4184 rpc_restart_call_prepare(task);
4187 if (task->tk_status >= 0) {
4188 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4189 nfs_post_op_update_inode_force_wcc(inode, &hdr->fattr);
4194 static bool nfs4_write_stateid_changed(struct rpc_task *task,
4195 struct nfs_pgio_args *args)
4198 if (!nfs4_error_stateid_expired(task->tk_status) ||
4199 nfs4_stateid_is_current(&args->stateid,
4204 rpc_restart_call_prepare(task);
4208 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4210 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4212 if (nfs4_write_stateid_changed(task, &hdr->args))
4214 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4215 nfs4_write_done_cb(task, hdr);
4219 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
4221 /* Don't request attributes for pNFS or O_DIRECT writes */
4222 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
4224 /* Otherwise, request attributes if and only if we don't hold
4227 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
4230 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4231 struct rpc_message *msg)
4233 struct nfs_server *server = NFS_SERVER(hdr->inode);
4235 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4236 hdr->args.bitmask = NULL;
4237 hdr->res.fattr = NULL;
4239 hdr->args.bitmask = server->cache_consistency_bitmask;
4241 if (!hdr->pgio_done_cb)
4242 hdr->pgio_done_cb = nfs4_write_done_cb;
4243 hdr->res.server = server;
4244 hdr->timestamp = jiffies;
4246 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
4247 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
4250 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
4252 nfs4_setup_sequence(NFS_SERVER(data->inode),
4253 &data->args.seq_args,
4258 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
4260 struct inode *inode = data->inode;
4262 trace_nfs4_commit(data, task->tk_status);
4263 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
4264 rpc_restart_call_prepare(task);
4270 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
4272 if (!nfs4_sequence_done(task, &data->res.seq_res))
4274 return data->commit_done_cb(task, data);
4277 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
4279 struct nfs_server *server = NFS_SERVER(data->inode);
4281 if (data->commit_done_cb == NULL)
4282 data->commit_done_cb = nfs4_commit_done_cb;
4283 data->res.server = server;
4284 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
4285 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4288 struct nfs4_renewdata {
4289 struct nfs_client *client;
4290 unsigned long timestamp;
4294 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4295 * standalone procedure for queueing an asynchronous RENEW.
4297 static void nfs4_renew_release(void *calldata)
4299 struct nfs4_renewdata *data = calldata;
4300 struct nfs_client *clp = data->client;
4302 if (atomic_read(&clp->cl_count) > 1)
4303 nfs4_schedule_state_renewal(clp);
4304 nfs_put_client(clp);
4308 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
4310 struct nfs4_renewdata *data = calldata;
4311 struct nfs_client *clp = data->client;
4312 unsigned long timestamp = data->timestamp;
4314 trace_nfs4_renew_async(clp, task->tk_status);
4315 switch (task->tk_status) {
4318 case -NFS4ERR_LEASE_MOVED:
4319 nfs4_schedule_lease_moved_recovery(clp);
4322 /* Unless we're shutting down, schedule state recovery! */
4323 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4325 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
4326 nfs4_schedule_lease_recovery(clp);
4329 nfs4_schedule_path_down_recovery(clp);
4331 do_renew_lease(clp, timestamp);
4334 static const struct rpc_call_ops nfs4_renew_ops = {
4335 .rpc_call_done = nfs4_renew_done,
4336 .rpc_release = nfs4_renew_release,
4339 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
4341 struct rpc_message msg = {
4342 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4346 struct nfs4_renewdata *data;
4348 if (renew_flags == 0)
4350 if (!atomic_inc_not_zero(&clp->cl_count))
4352 data = kmalloc(sizeof(*data), GFP_NOFS);
4356 data->timestamp = jiffies;
4357 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
4358 &nfs4_renew_ops, data);
4361 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
4363 struct rpc_message msg = {
4364 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4368 unsigned long now = jiffies;
4371 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4374 do_renew_lease(clp, now);
4378 static inline int nfs4_server_supports_acls(struct nfs_server *server)
4380 return server->caps & NFS_CAP_ACLS;
4383 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4384 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
4387 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
4389 static int buf_to_pages_noslab(const void *buf, size_t buflen,
4390 struct page **pages, unsigned int *pgbase)
4392 struct page *newpage, **spages;
4398 len = min_t(size_t, PAGE_SIZE, buflen);
4399 newpage = alloc_page(GFP_KERNEL);
4401 if (newpage == NULL)
4403 memcpy(page_address(newpage), buf, len);
4408 } while (buflen != 0);
4414 __free_page(spages[rc-1]);
4418 struct nfs4_cached_acl {
4424 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4426 struct nfs_inode *nfsi = NFS_I(inode);
4428 spin_lock(&inode->i_lock);
4429 kfree(nfsi->nfs4_acl);
4430 nfsi->nfs4_acl = acl;
4431 spin_unlock(&inode->i_lock);
4434 static void nfs4_zap_acl_attr(struct inode *inode)
4436 nfs4_set_cached_acl(inode, NULL);
4439 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4441 struct nfs_inode *nfsi = NFS_I(inode);
4442 struct nfs4_cached_acl *acl;
4445 spin_lock(&inode->i_lock);
4446 acl = nfsi->nfs4_acl;
4449 if (buf == NULL) /* user is just asking for length */
4451 if (acl->cached == 0)
4453 ret = -ERANGE; /* see getxattr(2) man page */
4454 if (acl->len > buflen)
4456 memcpy(buf, acl->data, acl->len);
4460 spin_unlock(&inode->i_lock);
4464 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
4466 struct nfs4_cached_acl *acl;
4467 size_t buflen = sizeof(*acl) + acl_len;
4469 if (buflen <= PAGE_SIZE) {
4470 acl = kmalloc(buflen, GFP_KERNEL);
4474 _copy_from_pages(acl->data, pages, pgbase, acl_len);
4476 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4483 nfs4_set_cached_acl(inode, acl);
4487 * The getxattr API returns the required buffer length when called with a
4488 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4489 * the required buf. On a NULL buf, we send a page of data to the server
4490 * guessing that the ACL request can be serviced by a page. If so, we cache
4491 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4492 * the cache. If not so, we throw away the page, and cache the required
4493 * length. The next getxattr call will then produce another round trip to
4494 * the server, this time with the input buf of the required size.
4496 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4498 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
4499 struct nfs_getaclargs args = {
4500 .fh = NFS_FH(inode),
4504 struct nfs_getaclres res = {
4507 struct rpc_message msg = {
4508 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4512 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4513 int ret = -ENOMEM, i;
4515 /* As long as we're doing a round trip to the server anyway,
4516 * let's be prepared for a page of acl data. */
4519 if (npages > ARRAY_SIZE(pages))
4522 for (i = 0; i < npages; i++) {
4523 pages[i] = alloc_page(GFP_KERNEL);
4528 /* for decoding across pages */
4529 res.acl_scratch = alloc_page(GFP_KERNEL);
4530 if (!res.acl_scratch)
4533 args.acl_len = npages * PAGE_SIZE;
4534 args.acl_pgbase = 0;
4536 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
4537 __func__, buf, buflen, npages, args.acl_len);
4538 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4539 &msg, &args.seq_args, &res.seq_res, 0);
4543 /* Handle the case where the passed-in buffer is too short */
4544 if (res.acl_flags & NFS4_ACL_TRUNC) {
4545 /* Did the user only issue a request for the acl length? */
4551 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
4553 if (res.acl_len > buflen) {
4557 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
4562 for (i = 0; i < npages; i++)
4564 __free_page(pages[i]);
4565 if (res.acl_scratch)
4566 __free_page(res.acl_scratch);
4570 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4572 struct nfs4_exception exception = { };
4575 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4576 trace_nfs4_get_acl(inode, ret);
4579 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4580 } while (exception.retry);
4584 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4586 struct nfs_server *server = NFS_SERVER(inode);
4589 if (!nfs4_server_supports_acls(server))
4591 ret = nfs_revalidate_inode(server, inode);
4594 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4595 nfs_zap_acl_cache(inode);
4596 ret = nfs4_read_cached_acl(inode, buf, buflen);
4598 /* -ENOENT is returned if there is no ACL or if there is an ACL
4599 * but no cached acl data, just the acl length */
4601 return nfs4_get_acl_uncached(inode, buf, buflen);
4604 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4606 struct nfs_server *server = NFS_SERVER(inode);
4607 struct page *pages[NFS4ACL_MAXPAGES];
4608 struct nfs_setaclargs arg = {
4609 .fh = NFS_FH(inode),
4613 struct nfs_setaclres res;
4614 struct rpc_message msg = {
4615 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4619 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4622 if (!nfs4_server_supports_acls(server))
4624 if (npages > ARRAY_SIZE(pages))
4626 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4629 nfs4_inode_return_delegation(inode);
4630 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4633 * Free each page after tx, so the only ref left is
4634 * held by the network stack
4637 put_page(pages[i-1]);
4640 * Acl update can result in inode attribute update.
4641 * so mark the attribute cache invalid.
4643 spin_lock(&inode->i_lock);
4644 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4645 spin_unlock(&inode->i_lock);
4646 nfs_access_zap_cache(inode);
4647 nfs_zap_acl_cache(inode);
4651 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4653 struct nfs4_exception exception = { };
4656 err = __nfs4_proc_set_acl(inode, buf, buflen);
4657 trace_nfs4_set_acl(inode, err);
4658 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4660 } while (exception.retry);
4664 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
4665 static int _nfs4_get_security_label(struct inode *inode, void *buf,
4668 struct nfs_server *server = NFS_SERVER(inode);
4669 struct nfs_fattr fattr;
4670 struct nfs4_label label = {0, 0, buflen, buf};
4672 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4673 struct nfs4_getattr_arg arg = {
4674 .fh = NFS_FH(inode),
4677 struct nfs4_getattr_res res = {
4682 struct rpc_message msg = {
4683 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4689 nfs_fattr_init(&fattr);
4691 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
4694 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4696 if (buflen < label.len)
4701 static int nfs4_get_security_label(struct inode *inode, void *buf,
4704 struct nfs4_exception exception = { };
4707 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4711 err = _nfs4_get_security_label(inode, buf, buflen);
4712 trace_nfs4_get_security_label(inode, err);
4713 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4715 } while (exception.retry);
4719 static int _nfs4_do_set_security_label(struct inode *inode,
4720 struct nfs4_label *ilabel,
4721 struct nfs_fattr *fattr,
4722 struct nfs4_label *olabel)
4725 struct iattr sattr = {0};
4726 struct nfs_server *server = NFS_SERVER(inode);
4727 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4728 struct nfs_setattrargs arg = {
4729 .fh = NFS_FH(inode),
4735 struct nfs_setattrres res = {
4740 struct rpc_message msg = {
4741 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
4747 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
4749 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4751 dprintk("%s failed: %d\n", __func__, status);
4756 static int nfs4_do_set_security_label(struct inode *inode,
4757 struct nfs4_label *ilabel,
4758 struct nfs_fattr *fattr,
4759 struct nfs4_label *olabel)
4761 struct nfs4_exception exception = { };
4765 err = _nfs4_do_set_security_label(inode, ilabel,
4767 trace_nfs4_set_security_label(inode, err);
4768 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4770 } while (exception.retry);
4775 nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4777 struct nfs4_label ilabel, *olabel = NULL;
4778 struct nfs_fattr fattr;
4779 struct rpc_cred *cred;
4780 struct inode *inode = dentry->d_inode;
4783 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4786 nfs_fattr_init(&fattr);
4790 ilabel.label = (char *)buf;
4791 ilabel.len = buflen;
4793 cred = rpc_lookup_cred();
4795 return PTR_ERR(cred);
4797 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4798 if (IS_ERR(olabel)) {
4799 status = -PTR_ERR(olabel);
4803 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4805 nfs_setsecurity(inode, &fattr, olabel);
4807 nfs4_label_free(olabel);
4812 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4816 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
4818 struct nfs_client *clp = server->nfs_client;
4820 if (task->tk_status >= 0)
4822 switch(task->tk_status) {
4823 case -NFS4ERR_DELEG_REVOKED:
4824 case -NFS4ERR_ADMIN_REVOKED:
4825 case -NFS4ERR_BAD_STATEID:
4828 nfs_remove_bad_delegation(state->inode);
4829 case -NFS4ERR_OPENMODE:
4832 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4833 goto recovery_failed;
4834 goto wait_on_recovery;
4835 case -NFS4ERR_EXPIRED:
4836 if (state != NULL) {
4837 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4838 goto recovery_failed;
4840 case -NFS4ERR_STALE_STATEID:
4841 case -NFS4ERR_STALE_CLIENTID:
4842 nfs4_schedule_lease_recovery(clp);
4843 goto wait_on_recovery;
4844 case -NFS4ERR_MOVED:
4845 if (nfs4_schedule_migration_recovery(server) < 0)
4846 goto recovery_failed;
4847 goto wait_on_recovery;
4848 case -NFS4ERR_LEASE_MOVED:
4849 nfs4_schedule_lease_moved_recovery(clp);
4850 goto wait_on_recovery;
4851 #if defined(CONFIG_NFS_V4_1)
4852 case -NFS4ERR_BADSESSION:
4853 case -NFS4ERR_BADSLOT:
4854 case -NFS4ERR_BAD_HIGH_SLOT:
4855 case -NFS4ERR_DEADSESSION:
4856 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4857 case -NFS4ERR_SEQ_FALSE_RETRY:
4858 case -NFS4ERR_SEQ_MISORDERED:
4859 dprintk("%s ERROR %d, Reset session\n", __func__,
4861 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4862 goto wait_on_recovery;
4863 #endif /* CONFIG_NFS_V4_1 */
4864 case -NFS4ERR_DELAY:
4865 nfs_inc_server_stats(server, NFSIOS_DELAY);
4866 case -NFS4ERR_GRACE:
4867 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4868 case -NFS4ERR_RETRY_UNCACHED_REP:
4869 case -NFS4ERR_OLD_STATEID:
4872 task->tk_status = nfs4_map_errors(task->tk_status);
4875 task->tk_status = -EIO;
4878 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
4879 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4880 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4881 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4882 goto recovery_failed;
4884 task->tk_status = 0;
4888 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4889 nfs4_verifier *bootverf)
4893 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4894 /* An impossible timestamp guarantees this value
4895 * will never match a generated boot time. */
4897 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
4899 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4900 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4901 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
4903 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4907 nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4908 char *buf, size_t len)
4910 unsigned int result;
4913 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4915 rpc_peeraddr2str(clp->cl_rpcclient,
4917 rpc_peeraddr2str(clp->cl_rpcclient,
4918 RPC_DISPLAY_PROTO));
4924 nfs4_init_uniform_client_string(const struct nfs_client *clp,
4925 char *buf, size_t len)
4927 const char *nodename = clp->cl_rpcclient->cl_nodename;
4929 if (nfs4_client_id_uniquifier[0] != '\0')
4930 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4931 clp->rpc_ops->version,
4932 clp->cl_minorversion,
4933 nfs4_client_id_uniquifier,
4935 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4936 clp->rpc_ops->version, clp->cl_minorversion,
4941 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
4942 * services. Advertise one based on the address family of the
4946 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
4948 if (strchr(clp->cl_ipaddr, ':') != NULL)
4949 return scnprintf(buf, len, "tcp6");
4951 return scnprintf(buf, len, "tcp");
4954 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
4956 struct nfs4_setclientid *sc = calldata;
4958 if (task->tk_status == 0)
4959 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
4962 static const struct rpc_call_ops nfs4_setclientid_ops = {
4963 .rpc_call_done = nfs4_setclientid_done,
4967 * nfs4_proc_setclientid - Negotiate client ID
4968 * @clp: state data structure
4969 * @program: RPC program for NFSv4 callback service
4970 * @port: IP port number for NFS4 callback service
4971 * @cred: RPC credential to use for this call
4972 * @res: where to place the result
4974 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4976 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4977 unsigned short port, struct rpc_cred *cred,
4978 struct nfs4_setclientid_res *res)
4980 nfs4_verifier sc_verifier;
4981 struct nfs4_setclientid setclientid = {
4982 .sc_verifier = &sc_verifier,
4984 .sc_cb_ident = clp->cl_cb_ident,
4986 struct rpc_message msg = {
4987 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4988 .rpc_argp = &setclientid,
4992 struct rpc_task *task;
4993 struct rpc_task_setup task_setup_data = {
4994 .rpc_client = clp->cl_rpcclient,
4995 .rpc_message = &msg,
4996 .callback_ops = &nfs4_setclientid_ops,
4997 .callback_data = &setclientid,
4998 .flags = RPC_TASK_TIMEOUT,
5002 /* nfs_client_id4 */
5003 nfs4_init_boot_verifier(clp, &sc_verifier);
5004 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5005 setclientid.sc_name_len =
5006 nfs4_init_uniform_client_string(clp,
5007 setclientid.sc_name,
5008 sizeof(setclientid.sc_name));
5010 setclientid.sc_name_len =
5011 nfs4_init_nonuniform_client_string(clp,
5012 setclientid.sc_name,
5013 sizeof(setclientid.sc_name));
5015 setclientid.sc_netid_len =
5016 nfs4_init_callback_netid(clp,
5017 setclientid.sc_netid,
5018 sizeof(setclientid.sc_netid));
5019 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
5020 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
5021 clp->cl_ipaddr, port >> 8, port & 255);
5023 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
5024 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5025 setclientid.sc_name_len, setclientid.sc_name);
5026 task = rpc_run_task(&task_setup_data);
5028 status = PTR_ERR(task);
5031 status = task->tk_status;
5032 if (setclientid.sc_cred) {
5033 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5034 put_rpccred(setclientid.sc_cred);
5038 trace_nfs4_setclientid(clp, status);
5039 dprintk("NFS reply setclientid: %d\n", status);
5044 * nfs4_proc_setclientid_confirm - Confirm client ID
5045 * @clp: state data structure
5046 * @res: result of a previous SETCLIENTID
5047 * @cred: RPC credential to use for this call
5049 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5051 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
5052 struct nfs4_setclientid_res *arg,
5053 struct rpc_cred *cred)
5055 struct rpc_message msg = {
5056 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
5062 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5063 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5065 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5066 trace_nfs4_setclientid_confirm(clp, status);
5067 dprintk("NFS reply setclientid_confirm: %d\n", status);
5071 struct nfs4_delegreturndata {
5072 struct nfs4_delegreturnargs args;
5073 struct nfs4_delegreturnres res;
5075 nfs4_stateid stateid;
5076 unsigned long timestamp;
5077 struct nfs_fattr fattr;
5079 struct inode *inode;
5084 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5086 struct nfs4_delegreturndata *data = calldata;
5088 if (!nfs4_sequence_done(task, &data->res.seq_res))
5091 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
5092 switch (task->tk_status) {
5094 renew_lease(data->res.server, data->timestamp);
5095 case -NFS4ERR_ADMIN_REVOKED:
5096 case -NFS4ERR_DELEG_REVOKED:
5097 case -NFS4ERR_BAD_STATEID:
5098 case -NFS4ERR_OLD_STATEID:
5099 case -NFS4ERR_STALE_STATEID:
5100 case -NFS4ERR_EXPIRED:
5101 task->tk_status = 0;
5103 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
5106 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
5108 rpc_restart_call_prepare(task);
5112 data->rpc_status = task->tk_status;
5115 static void nfs4_delegreturn_release(void *calldata)
5117 struct nfs4_delegreturndata *data = calldata;
5120 pnfs_roc_release(data->inode);
5124 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5126 struct nfs4_delegreturndata *d_data;
5128 d_data = (struct nfs4_delegreturndata *)data;
5131 pnfs_roc_drain(d_data->inode, &d_data->roc_barrier, task))
5134 nfs4_setup_sequence(d_data->res.server,
5135 &d_data->args.seq_args,
5136 &d_data->res.seq_res,
5140 static const struct rpc_call_ops nfs4_delegreturn_ops = {
5141 .rpc_call_prepare = nfs4_delegreturn_prepare,
5142 .rpc_call_done = nfs4_delegreturn_done,
5143 .rpc_release = nfs4_delegreturn_release,
5146 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5148 struct nfs4_delegreturndata *data;
5149 struct nfs_server *server = NFS_SERVER(inode);
5150 struct rpc_task *task;
5151 struct rpc_message msg = {
5152 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5155 struct rpc_task_setup task_setup_data = {
5156 .rpc_client = server->client,
5157 .rpc_message = &msg,
5158 .callback_ops = &nfs4_delegreturn_ops,
5159 .flags = RPC_TASK_ASYNC,
5163 data = kzalloc(sizeof(*data), GFP_NOFS);
5166 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
5167 data->args.fhandle = &data->fh;
5168 data->args.stateid = &data->stateid;
5169 data->args.bitmask = server->cache_consistency_bitmask;
5170 nfs_copy_fh(&data->fh, NFS_FH(inode));
5171 nfs4_stateid_copy(&data->stateid, stateid);
5172 data->res.fattr = &data->fattr;
5173 data->res.server = server;
5174 nfs_fattr_init(data->res.fattr);
5175 data->timestamp = jiffies;
5176 data->rpc_status = 0;
5177 data->inode = inode;
5178 data->roc = list_empty(&NFS_I(inode)->open_files) ?
5179 pnfs_roc(inode) : false;
5181 task_setup_data.callback_data = data;
5182 msg.rpc_argp = &data->args;
5183 msg.rpc_resp = &data->res;
5184 task = rpc_run_task(&task_setup_data);
5186 return PTR_ERR(task);
5189 status = nfs4_wait_for_completion_rpc_task(task);
5192 status = data->rpc_status;
5194 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5196 nfs_refresh_inode(inode, &data->fattr);
5202 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5204 struct nfs_server *server = NFS_SERVER(inode);
5205 struct nfs4_exception exception = { };
5208 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
5209 trace_nfs4_delegreturn(inode, err);
5211 case -NFS4ERR_STALE_STATEID:
5212 case -NFS4ERR_EXPIRED:
5216 err = nfs4_handle_exception(server, err, &exception);
5217 } while (exception.retry);
5221 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5222 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5225 * sleep, with exponential backoff, and retry the LOCK operation.
5227 static unsigned long
5228 nfs4_set_lock_task_retry(unsigned long timeout)
5230 freezable_schedule_timeout_killable_unsafe(timeout);
5232 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5233 return NFS4_LOCK_MAXTIMEOUT;
5237 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5239 struct inode *inode = state->inode;
5240 struct nfs_server *server = NFS_SERVER(inode);
5241 struct nfs_client *clp = server->nfs_client;
5242 struct nfs_lockt_args arg = {
5243 .fh = NFS_FH(inode),
5246 struct nfs_lockt_res res = {
5249 struct rpc_message msg = {
5250 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5253 .rpc_cred = state->owner->so_cred,
5255 struct nfs4_lock_state *lsp;
5258 arg.lock_owner.clientid = clp->cl_clientid;
5259 status = nfs4_set_lock_state(state, request);
5262 lsp = request->fl_u.nfs4_fl.owner;
5263 arg.lock_owner.id = lsp->ls_seqid.owner_id;
5264 arg.lock_owner.s_dev = server->s_dev;
5265 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5268 request->fl_type = F_UNLCK;
5270 case -NFS4ERR_DENIED:
5273 request->fl_ops->fl_release_private(request);
5274 request->fl_ops = NULL;
5279 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5281 struct nfs4_exception exception = { };
5285 err = _nfs4_proc_getlk(state, cmd, request);
5286 trace_nfs4_get_lock(request, state, cmd, err);
5287 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
5289 } while (exception.retry);
5293 static int do_vfs_lock(struct file *file, struct file_lock *fl)
5296 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5298 res = posix_lock_file_wait(file, fl);
5301 res = flock_lock_file_wait(file, fl);
5309 struct nfs4_unlockdata {
5310 struct nfs_locku_args arg;
5311 struct nfs_locku_res res;
5312 struct nfs4_lock_state *lsp;
5313 struct nfs_open_context *ctx;
5314 struct file_lock fl;
5315 const struct nfs_server *server;
5316 unsigned long timestamp;
5319 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5320 struct nfs_open_context *ctx,
5321 struct nfs4_lock_state *lsp,
5322 struct nfs_seqid *seqid)
5324 struct nfs4_unlockdata *p;
5325 struct inode *inode = lsp->ls_state->inode;
5327 p = kzalloc(sizeof(*p), GFP_NOFS);
5330 p->arg.fh = NFS_FH(inode);
5332 p->arg.seqid = seqid;
5333 p->res.seqid = seqid;
5334 p->arg.stateid = &lsp->ls_stateid;
5336 atomic_inc(&lsp->ls_count);
5337 /* Ensure we don't close file until we're done freeing locks! */
5338 p->ctx = get_nfs_open_context(ctx);
5339 memcpy(&p->fl, fl, sizeof(p->fl));
5340 p->server = NFS_SERVER(inode);
5344 static void nfs4_locku_release_calldata(void *data)
5346 struct nfs4_unlockdata *calldata = data;
5347 nfs_free_seqid(calldata->arg.seqid);
5348 nfs4_put_lock_state(calldata->lsp);
5349 put_nfs_open_context(calldata->ctx);
5353 static void nfs4_locku_done(struct rpc_task *task, void *data)
5355 struct nfs4_unlockdata *calldata = data;
5357 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5359 switch (task->tk_status) {
5361 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5362 &calldata->res.stateid);
5363 renew_lease(calldata->server, calldata->timestamp);
5365 case -NFS4ERR_BAD_STATEID:
5366 case -NFS4ERR_OLD_STATEID:
5367 case -NFS4ERR_STALE_STATEID:
5368 case -NFS4ERR_EXPIRED:
5371 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
5372 rpc_restart_call_prepare(task);
5374 nfs_release_seqid(calldata->arg.seqid);
5377 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
5379 struct nfs4_unlockdata *calldata = data;
5381 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
5383 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
5384 /* Note: exit _without_ running nfs4_locku_done */
5387 calldata->timestamp = jiffies;
5388 if (nfs4_setup_sequence(calldata->server,
5389 &calldata->arg.seq_args,
5390 &calldata->res.seq_res,
5392 nfs_release_seqid(calldata->arg.seqid);
5395 task->tk_action = NULL;
5397 nfs4_sequence_done(task, &calldata->res.seq_res);
5400 static const struct rpc_call_ops nfs4_locku_ops = {
5401 .rpc_call_prepare = nfs4_locku_prepare,
5402 .rpc_call_done = nfs4_locku_done,
5403 .rpc_release = nfs4_locku_release_calldata,
5406 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5407 struct nfs_open_context *ctx,
5408 struct nfs4_lock_state *lsp,
5409 struct nfs_seqid *seqid)
5411 struct nfs4_unlockdata *data;
5412 struct rpc_message msg = {
5413 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5414 .rpc_cred = ctx->cred,
5416 struct rpc_task_setup task_setup_data = {
5417 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5418 .rpc_message = &msg,
5419 .callback_ops = &nfs4_locku_ops,
5420 .workqueue = nfsiod_workqueue,
5421 .flags = RPC_TASK_ASYNC,
5424 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5425 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5427 /* Ensure this is an unlock - when canceling a lock, the
5428 * canceled lock is passed in, and it won't be an unlock.
5430 fl->fl_type = F_UNLCK;
5432 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5434 nfs_free_seqid(seqid);
5435 return ERR_PTR(-ENOMEM);
5438 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5439 msg.rpc_argp = &data->arg;
5440 msg.rpc_resp = &data->res;
5441 task_setup_data.callback_data = data;
5442 return rpc_run_task(&task_setup_data);
5445 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5447 struct inode *inode = state->inode;
5448 struct nfs4_state_owner *sp = state->owner;
5449 struct nfs_inode *nfsi = NFS_I(inode);
5450 struct nfs_seqid *seqid;
5451 struct nfs4_lock_state *lsp;
5452 struct rpc_task *task;
5454 unsigned char fl_flags = request->fl_flags;
5456 status = nfs4_set_lock_state(state, request);
5457 /* Unlock _before_ we do the RPC call */
5458 request->fl_flags |= FL_EXISTS;
5459 /* Exclude nfs_delegation_claim_locks() */
5460 mutex_lock(&sp->so_delegreturn_mutex);
5461 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
5462 down_read(&nfsi->rwsem);
5463 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5464 up_read(&nfsi->rwsem);
5465 mutex_unlock(&sp->so_delegreturn_mutex);
5468 up_read(&nfsi->rwsem);
5469 mutex_unlock(&sp->so_delegreturn_mutex);
5472 /* Is this a delegated lock? */
5473 lsp = request->fl_u.nfs4_fl.owner;
5474 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5476 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
5480 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
5481 status = PTR_ERR(task);
5484 status = nfs4_wait_for_completion_rpc_task(task);
5487 request->fl_flags = fl_flags;
5488 trace_nfs4_unlock(request, state, F_SETLK, status);
5492 struct nfs4_lockdata {
5493 struct nfs_lock_args arg;
5494 struct nfs_lock_res res;
5495 struct nfs4_lock_state *lsp;
5496 struct nfs_open_context *ctx;
5497 struct file_lock fl;
5498 unsigned long timestamp;
5501 struct nfs_server *server;
5504 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
5505 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5508 struct nfs4_lockdata *p;
5509 struct inode *inode = lsp->ls_state->inode;
5510 struct nfs_server *server = NFS_SERVER(inode);
5512 p = kzalloc(sizeof(*p), gfp_mask);
5516 p->arg.fh = NFS_FH(inode);
5518 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
5519 if (p->arg.open_seqid == NULL)
5521 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
5522 if (p->arg.lock_seqid == NULL)
5523 goto out_free_seqid;
5524 p->arg.lock_stateid = &lsp->ls_stateid;
5525 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
5526 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
5527 p->arg.lock_owner.s_dev = server->s_dev;
5528 p->res.lock_seqid = p->arg.lock_seqid;
5531 atomic_inc(&lsp->ls_count);
5532 p->ctx = get_nfs_open_context(ctx);
5533 memcpy(&p->fl, fl, sizeof(p->fl));
5536 nfs_free_seqid(p->arg.open_seqid);
5542 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5544 struct nfs4_lockdata *data = calldata;
5545 struct nfs4_state *state = data->lsp->ls_state;
5547 dprintk("%s: begin!\n", __func__);
5548 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
5550 /* Do we need to do an open_to_lock_owner? */
5551 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
5552 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
5553 goto out_release_lock_seqid;
5555 data->arg.open_stateid = &state->open_stateid;
5556 data->arg.new_lock_owner = 1;
5557 data->res.open_seqid = data->arg.open_seqid;
5559 data->arg.new_lock_owner = 0;
5560 if (!nfs4_valid_open_stateid(state)) {
5561 data->rpc_status = -EBADF;
5562 task->tk_action = NULL;
5563 goto out_release_open_seqid;
5565 data->timestamp = jiffies;
5566 if (nfs4_setup_sequence(data->server,
5567 &data->arg.seq_args,
5571 out_release_open_seqid:
5572 nfs_release_seqid(data->arg.open_seqid);
5573 out_release_lock_seqid:
5574 nfs_release_seqid(data->arg.lock_seqid);
5576 nfs4_sequence_done(task, &data->res.seq_res);
5577 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
5580 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5582 struct nfs4_lockdata *data = calldata;
5584 dprintk("%s: begin!\n", __func__);
5586 if (!nfs4_sequence_done(task, &data->res.seq_res))
5589 data->rpc_status = task->tk_status;
5590 if (data->arg.new_lock_owner != 0) {
5591 if (data->rpc_status == 0)
5592 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5596 if (data->rpc_status == 0) {
5597 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
5598 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
5599 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
5602 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
5605 static void nfs4_lock_release(void *calldata)
5607 struct nfs4_lockdata *data = calldata;
5609 dprintk("%s: begin!\n", __func__);
5610 nfs_free_seqid(data->arg.open_seqid);
5611 if (data->cancelled != 0) {
5612 struct rpc_task *task;
5613 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5614 data->arg.lock_seqid);
5616 rpc_put_task_async(task);
5617 dprintk("%s: cancelling lock!\n", __func__);
5619 nfs_free_seqid(data->arg.lock_seqid);
5620 nfs4_put_lock_state(data->lsp);
5621 put_nfs_open_context(data->ctx);
5623 dprintk("%s: done!\n", __func__);
5626 static const struct rpc_call_ops nfs4_lock_ops = {
5627 .rpc_call_prepare = nfs4_lock_prepare,
5628 .rpc_call_done = nfs4_lock_done,
5629 .rpc_release = nfs4_lock_release,
5632 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5635 case -NFS4ERR_ADMIN_REVOKED:
5636 case -NFS4ERR_BAD_STATEID:
5637 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
5638 if (new_lock_owner != 0 ||
5639 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
5640 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
5642 case -NFS4ERR_STALE_STATEID:
5643 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
5644 case -NFS4ERR_EXPIRED:
5645 nfs4_schedule_lease_recovery(server->nfs_client);
5649 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
5651 struct nfs4_lockdata *data;
5652 struct rpc_task *task;
5653 struct rpc_message msg = {
5654 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5655 .rpc_cred = state->owner->so_cred,
5657 struct rpc_task_setup task_setup_data = {
5658 .rpc_client = NFS_CLIENT(state->inode),
5659 .rpc_message = &msg,
5660 .callback_ops = &nfs4_lock_ops,
5661 .workqueue = nfsiod_workqueue,
5662 .flags = RPC_TASK_ASYNC,
5666 dprintk("%s: begin!\n", __func__);
5667 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
5668 fl->fl_u.nfs4_fl.owner,
5669 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
5673 data->arg.block = 1;
5674 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5675 msg.rpc_argp = &data->arg;
5676 msg.rpc_resp = &data->res;
5677 task_setup_data.callback_data = data;
5678 if (recovery_type > NFS_LOCK_NEW) {
5679 if (recovery_type == NFS_LOCK_RECLAIM)
5680 data->arg.reclaim = NFS_LOCK_RECLAIM;
5681 nfs4_set_sequence_privileged(&data->arg.seq_args);
5683 task = rpc_run_task(&task_setup_data);
5685 return PTR_ERR(task);
5686 ret = nfs4_wait_for_completion_rpc_task(task);
5688 ret = data->rpc_status;
5690 nfs4_handle_setlk_error(data->server, data->lsp,
5691 data->arg.new_lock_owner, ret);
5693 data->cancelled = 1;
5695 dprintk("%s: done, ret = %d!\n", __func__, ret);
5699 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5701 struct nfs_server *server = NFS_SERVER(state->inode);
5702 struct nfs4_exception exception = {
5703 .inode = state->inode,
5708 /* Cache the lock if possible... */
5709 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5711 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
5712 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
5713 if (err != -NFS4ERR_DELAY)
5715 nfs4_handle_exception(server, err, &exception);
5716 } while (exception.retry);
5720 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5722 struct nfs_server *server = NFS_SERVER(state->inode);
5723 struct nfs4_exception exception = {
5724 .inode = state->inode,
5728 err = nfs4_set_lock_state(state, request);
5731 if (!recover_lost_locks) {
5732 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5736 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5738 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
5739 trace_nfs4_lock_expired(request, state, F_SETLK, err);
5743 case -NFS4ERR_GRACE:
5744 case -NFS4ERR_DELAY:
5745 nfs4_handle_exception(server, err, &exception);
5748 } while (exception.retry);
5753 #if defined(CONFIG_NFS_V4_1)
5755 * nfs41_check_expired_locks - possibly free a lock stateid
5757 * @state: NFSv4 state for an inode
5759 * Returns NFS_OK if recovery for this stateid is now finished.
5760 * Otherwise a negative NFS4ERR value is returned.
5762 static int nfs41_check_expired_locks(struct nfs4_state *state)
5764 int status, ret = -NFS4ERR_BAD_STATEID;
5765 struct nfs4_lock_state *lsp;
5766 struct nfs_server *server = NFS_SERVER(state->inode);
5768 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
5769 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
5770 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5772 status = nfs41_test_stateid(server,
5775 trace_nfs4_test_lock_stateid(state, lsp, status);
5776 if (status != NFS_OK) {
5777 /* Free the stateid unless the server
5778 * informs us the stateid is unrecognized. */
5779 if (status != -NFS4ERR_BAD_STATEID)
5780 nfs41_free_stateid(server,
5783 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5792 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5794 int status = NFS_OK;
5796 if (test_bit(LK_STATE_IN_USE, &state->flags))
5797 status = nfs41_check_expired_locks(state);
5798 if (status != NFS_OK)
5799 status = nfs4_lock_expired(state, request);
5804 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5806 struct nfs4_state_owner *sp = state->owner;
5807 struct nfs_inode *nfsi = NFS_I(state->inode);
5808 unsigned char fl_flags = request->fl_flags;
5810 int status = -ENOLCK;
5812 if ((fl_flags & FL_POSIX) &&
5813 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5815 /* Is this a delegated open? */
5816 status = nfs4_set_lock_state(state, request);
5819 request->fl_flags |= FL_ACCESS;
5820 status = do_vfs_lock(request->fl_file, request);
5823 down_read(&nfsi->rwsem);
5824 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
5825 /* Yes: cache locks! */
5826 /* ...but avoid races with delegation recall... */
5827 request->fl_flags = fl_flags & ~FL_SLEEP;
5828 status = do_vfs_lock(request->fl_file, request);
5831 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5832 up_read(&nfsi->rwsem);
5833 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
5836 down_read(&nfsi->rwsem);
5837 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5838 status = -NFS4ERR_DELAY;
5841 /* Note: we always want to sleep here! */
5842 request->fl_flags = fl_flags | FL_SLEEP;
5843 if (do_vfs_lock(request->fl_file, request) < 0)
5844 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5845 "manager!\n", __func__);
5847 up_read(&nfsi->rwsem);
5849 request->fl_flags = fl_flags;
5853 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5855 struct nfs4_exception exception = {
5857 .inode = state->inode,
5862 err = _nfs4_proc_setlk(state, cmd, request);
5863 trace_nfs4_set_lock(request, state, cmd, err);
5864 if (err == -NFS4ERR_DENIED)
5866 err = nfs4_handle_exception(NFS_SERVER(state->inode),
5868 } while (exception.retry);
5873 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5875 struct nfs_open_context *ctx;
5876 struct nfs4_state *state;
5877 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5880 /* verify open state */
5881 ctx = nfs_file_open_context(filp);
5884 if (request->fl_start < 0 || request->fl_end < 0)
5887 if (IS_GETLK(cmd)) {
5889 return nfs4_proc_getlk(state, F_GETLK, request);
5893 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5896 if (request->fl_type == F_UNLCK) {
5898 return nfs4_proc_unlck(state, cmd, request);
5905 * Don't rely on the VFS having checked the file open mode,
5906 * since it won't do this for flock() locks.
5908 switch (request->fl_type) {
5910 if (!(filp->f_mode & FMODE_READ))
5914 if (!(filp->f_mode & FMODE_WRITE))
5919 status = nfs4_proc_setlk(state, cmd, request);
5920 if ((status != -EAGAIN) || IS_SETLK(cmd))
5922 timeout = nfs4_set_lock_task_retry(timeout);
5923 status = -ERESTARTSYS;
5926 } while(status < 0);
5930 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
5932 struct nfs_server *server = NFS_SERVER(state->inode);
5935 err = nfs4_set_lock_state(state, fl);
5938 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
5939 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
5942 struct nfs_release_lockowner_data {
5943 struct nfs4_lock_state *lsp;
5944 struct nfs_server *server;
5945 struct nfs_release_lockowner_args args;
5946 struct nfs_release_lockowner_res res;
5947 unsigned long timestamp;
5950 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
5952 struct nfs_release_lockowner_data *data = calldata;
5953 struct nfs_server *server = data->server;
5954 nfs40_setup_sequence(server, &data->args.seq_args,
5955 &data->res.seq_res, task);
5956 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5957 data->timestamp = jiffies;
5960 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
5962 struct nfs_release_lockowner_data *data = calldata;
5963 struct nfs_server *server = data->server;
5965 nfs40_sequence_done(task, &data->res.seq_res);
5967 switch (task->tk_status) {
5969 renew_lease(server, data->timestamp);
5971 case -NFS4ERR_STALE_CLIENTID:
5972 case -NFS4ERR_EXPIRED:
5973 nfs4_schedule_lease_recovery(server->nfs_client);
5975 case -NFS4ERR_LEASE_MOVED:
5976 case -NFS4ERR_DELAY:
5977 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN)
5978 rpc_restart_call_prepare(task);
5982 static void nfs4_release_lockowner_release(void *calldata)
5984 struct nfs_release_lockowner_data *data = calldata;
5985 nfs4_free_lock_state(data->server, data->lsp);
5989 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
5990 .rpc_call_prepare = nfs4_release_lockowner_prepare,
5991 .rpc_call_done = nfs4_release_lockowner_done,
5992 .rpc_release = nfs4_release_lockowner_release,
5996 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
5998 struct nfs_release_lockowner_data *data;
5999 struct rpc_message msg = {
6000 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6003 if (server->nfs_client->cl_mvops->minor_version != 0)
6006 data = kmalloc(sizeof(*data), GFP_NOFS);
6010 data->server = server;
6011 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6012 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6013 data->args.lock_owner.s_dev = server->s_dev;
6015 msg.rpc_argp = &data->args;
6016 msg.rpc_resp = &data->res;
6017 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
6018 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
6021 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6023 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6024 const void *buf, size_t buflen,
6025 int flags, int type)
6027 if (strcmp(key, "") != 0)
6030 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6033 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6034 void *buf, size_t buflen, int type)
6036 if (strcmp(key, "") != 0)
6039 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6042 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6043 size_t list_len, const char *name,
6044 size_t name_len, int type)
6046 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6048 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
6051 if (list && len <= list_len)
6052 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
6056 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
6057 static inline int nfs4_server_supports_labels(struct nfs_server *server)
6059 return server->caps & NFS_CAP_SECURITY_LABEL;
6062 static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6063 const void *buf, size_t buflen,
6064 int flags, int type)
6066 if (security_ismaclabel(key))
6067 return nfs4_set_security_label(dentry, buf, buflen);
6072 static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6073 void *buf, size_t buflen, int type)
6075 if (security_ismaclabel(key))
6076 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
6080 static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6081 size_t list_len, const char *name,
6082 size_t name_len, int type)
6086 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
6087 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
6088 if (list && len <= list_len)
6089 security_inode_listsecurity(dentry->d_inode, list, len);
6094 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6095 .prefix = XATTR_SECURITY_PREFIX,
6096 .list = nfs4_xattr_list_nfs4_label,
6097 .get = nfs4_xattr_get_nfs4_label,
6098 .set = nfs4_xattr_set_nfs4_label,
6104 * nfs_fhget will use either the mounted_on_fileid or the fileid
6106 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6108 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6109 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6110 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
6111 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
6114 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
6115 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
6116 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6120 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6121 const struct qstr *name,
6122 struct nfs4_fs_locations *fs_locations,
6125 struct nfs_server *server = NFS_SERVER(dir);
6127 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6129 struct nfs4_fs_locations_arg args = {
6130 .dir_fh = NFS_FH(dir),
6135 struct nfs4_fs_locations_res res = {
6136 .fs_locations = fs_locations,
6138 struct rpc_message msg = {
6139 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6145 dprintk("%s: start\n", __func__);
6147 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6148 * is not supported */
6149 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6150 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6152 bitmask[0] |= FATTR4_WORD0_FILEID;
6154 nfs_fattr_init(&fs_locations->fattr);
6155 fs_locations->server = server;
6156 fs_locations->nlocations = 0;
6157 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
6158 dprintk("%s: returned status = %d\n", __func__, status);
6162 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6163 const struct qstr *name,
6164 struct nfs4_fs_locations *fs_locations,
6167 struct nfs4_exception exception = { };
6170 err = _nfs4_proc_fs_locations(client, dir, name,
6171 fs_locations, page);
6172 trace_nfs4_get_fs_locations(dir, name, err);
6173 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6175 } while (exception.retry);
6180 * This operation also signals the server that this client is
6181 * performing migration recovery. The server can stop returning
6182 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6183 * appended to this compound to identify the client ID which is
6184 * performing recovery.
6186 static int _nfs40_proc_get_locations(struct inode *inode,
6187 struct nfs4_fs_locations *locations,
6188 struct page *page, struct rpc_cred *cred)
6190 struct nfs_server *server = NFS_SERVER(inode);
6191 struct rpc_clnt *clnt = server->client;
6193 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6195 struct nfs4_fs_locations_arg args = {
6196 .clientid = server->nfs_client->cl_clientid,
6197 .fh = NFS_FH(inode),
6200 .migration = 1, /* skip LOOKUP */
6201 .renew = 1, /* append RENEW */
6203 struct nfs4_fs_locations_res res = {
6204 .fs_locations = locations,
6208 struct rpc_message msg = {
6209 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6214 unsigned long now = jiffies;
6217 nfs_fattr_init(&locations->fattr);
6218 locations->server = server;
6219 locations->nlocations = 0;
6221 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6222 nfs4_set_sequence_privileged(&args.seq_args);
6223 status = nfs4_call_sync_sequence(clnt, server, &msg,
6224 &args.seq_args, &res.seq_res);
6228 renew_lease(server, now);
6232 #ifdef CONFIG_NFS_V4_1
6235 * This operation also signals the server that this client is
6236 * performing migration recovery. The server can stop asserting
6237 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6238 * performing this operation is identified in the SEQUENCE
6239 * operation in this compound.
6241 * When the client supports GETATTR(fs_locations_info), it can
6242 * be plumbed in here.
6244 static int _nfs41_proc_get_locations(struct inode *inode,
6245 struct nfs4_fs_locations *locations,
6246 struct page *page, struct rpc_cred *cred)
6248 struct nfs_server *server = NFS_SERVER(inode);
6249 struct rpc_clnt *clnt = server->client;
6251 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6253 struct nfs4_fs_locations_arg args = {
6254 .fh = NFS_FH(inode),
6257 .migration = 1, /* skip LOOKUP */
6259 struct nfs4_fs_locations_res res = {
6260 .fs_locations = locations,
6263 struct rpc_message msg = {
6264 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6271 nfs_fattr_init(&locations->fattr);
6272 locations->server = server;
6273 locations->nlocations = 0;
6275 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6276 nfs4_set_sequence_privileged(&args.seq_args);
6277 status = nfs4_call_sync_sequence(clnt, server, &msg,
6278 &args.seq_args, &res.seq_res);
6279 if (status == NFS4_OK &&
6280 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6281 status = -NFS4ERR_LEASE_MOVED;
6285 #endif /* CONFIG_NFS_V4_1 */
6288 * nfs4_proc_get_locations - discover locations for a migrated FSID
6289 * @inode: inode on FSID that is migrating
6290 * @locations: result of query
6292 * @cred: credential to use for this operation
6294 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6295 * operation failed, or a negative errno if a local error occurred.
6297 * On success, "locations" is filled in, but if the server has
6298 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6301 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6302 * from this client that require migration recovery.
6304 int nfs4_proc_get_locations(struct inode *inode,
6305 struct nfs4_fs_locations *locations,
6306 struct page *page, struct rpc_cred *cred)
6308 struct nfs_server *server = NFS_SERVER(inode);
6309 struct nfs_client *clp = server->nfs_client;
6310 const struct nfs4_mig_recovery_ops *ops =
6311 clp->cl_mvops->mig_recovery_ops;
6312 struct nfs4_exception exception = { };
6315 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6316 (unsigned long long)server->fsid.major,
6317 (unsigned long long)server->fsid.minor,
6319 nfs_display_fhandle(NFS_FH(inode), __func__);
6322 status = ops->get_locations(inode, locations, page, cred);
6323 if (status != -NFS4ERR_DELAY)
6325 nfs4_handle_exception(server, status, &exception);
6326 } while (exception.retry);
6331 * This operation also signals the server that this client is
6332 * performing "lease moved" recovery. The server can stop
6333 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6334 * is appended to this compound to identify the client ID which is
6335 * performing recovery.
6337 static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6339 struct nfs_server *server = NFS_SERVER(inode);
6340 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6341 struct rpc_clnt *clnt = server->client;
6342 struct nfs4_fsid_present_arg args = {
6343 .fh = NFS_FH(inode),
6344 .clientid = clp->cl_clientid,
6345 .renew = 1, /* append RENEW */
6347 struct nfs4_fsid_present_res res = {
6350 struct rpc_message msg = {
6351 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6356 unsigned long now = jiffies;
6359 res.fh = nfs_alloc_fhandle();
6363 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6364 nfs4_set_sequence_privileged(&args.seq_args);
6365 status = nfs4_call_sync_sequence(clnt, server, &msg,
6366 &args.seq_args, &res.seq_res);
6367 nfs_free_fhandle(res.fh);
6371 do_renew_lease(clp, now);
6375 #ifdef CONFIG_NFS_V4_1
6378 * This operation also signals the server that this client is
6379 * performing "lease moved" recovery. The server can stop asserting
6380 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6381 * this operation is identified in the SEQUENCE operation in this
6384 static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6386 struct nfs_server *server = NFS_SERVER(inode);
6387 struct rpc_clnt *clnt = server->client;
6388 struct nfs4_fsid_present_arg args = {
6389 .fh = NFS_FH(inode),
6391 struct nfs4_fsid_present_res res = {
6393 struct rpc_message msg = {
6394 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6401 res.fh = nfs_alloc_fhandle();
6405 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6406 nfs4_set_sequence_privileged(&args.seq_args);
6407 status = nfs4_call_sync_sequence(clnt, server, &msg,
6408 &args.seq_args, &res.seq_res);
6409 nfs_free_fhandle(res.fh);
6410 if (status == NFS4_OK &&
6411 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6412 status = -NFS4ERR_LEASE_MOVED;
6416 #endif /* CONFIG_NFS_V4_1 */
6419 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6420 * @inode: inode on FSID to check
6421 * @cred: credential to use for this operation
6423 * Server indicates whether the FSID is present, moved, or not
6424 * recognized. This operation is necessary to clear a LEASE_MOVED
6425 * condition for this client ID.
6427 * Returns NFS4_OK if the FSID is present on this server,
6428 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6429 * NFS4ERR code if some error occurred on the server, or a
6430 * negative errno if a local failure occurred.
6432 int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6434 struct nfs_server *server = NFS_SERVER(inode);
6435 struct nfs_client *clp = server->nfs_client;
6436 const struct nfs4_mig_recovery_ops *ops =
6437 clp->cl_mvops->mig_recovery_ops;
6438 struct nfs4_exception exception = { };
6441 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6442 (unsigned long long)server->fsid.major,
6443 (unsigned long long)server->fsid.minor,
6445 nfs_display_fhandle(NFS_FH(inode), __func__);
6448 status = ops->fsid_present(inode, cred);
6449 if (status != -NFS4ERR_DELAY)
6451 nfs4_handle_exception(server, status, &exception);
6452 } while (exception.retry);
6457 * If 'use_integrity' is true and the state managment nfs_client
6458 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6459 * and the machine credential as per RFC3530bis and RFC5661 Security
6460 * Considerations sections. Otherwise, just use the user cred with the
6461 * filesystem's rpc_client.
6463 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
6466 struct nfs4_secinfo_arg args = {
6467 .dir_fh = NFS_FH(dir),
6470 struct nfs4_secinfo_res res = {
6473 struct rpc_message msg = {
6474 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6478 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
6479 struct rpc_cred *cred = NULL;
6481 if (use_integrity) {
6482 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
6483 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6484 msg.rpc_cred = cred;
6487 dprintk("NFS call secinfo %s\n", name->name);
6489 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6490 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6492 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6494 dprintk("NFS reply secinfo: %d\n", status);
6502 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6503 struct nfs4_secinfo_flavors *flavors)
6505 struct nfs4_exception exception = { };
6508 err = -NFS4ERR_WRONGSEC;
6510 /* try to use integrity protection with machine cred */
6511 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6512 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6515 * if unable to use integrity protection, or SECINFO with
6516 * integrity protection returns NFS4ERR_WRONGSEC (which is
6517 * disallowed by spec, but exists in deployed servers) use
6518 * the current filesystem's rpc_client and the user cred.
6520 if (err == -NFS4ERR_WRONGSEC)
6521 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6523 trace_nfs4_secinfo(dir, name, err);
6524 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6526 } while (exception.retry);
6530 #ifdef CONFIG_NFS_V4_1
6532 * Check the exchange flags returned by the server for invalid flags, having
6533 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6536 static int nfs4_check_cl_exchange_flags(u32 flags)
6538 if (flags & ~EXCHGID4_FLAG_MASK_R)
6540 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6541 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6543 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6547 return -NFS4ERR_INVAL;
6551 nfs41_same_server_scope(struct nfs41_server_scope *a,
6552 struct nfs41_server_scope *b)
6554 if (a->server_scope_sz == b->server_scope_sz &&
6555 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6562 * nfs4_proc_bind_conn_to_session()
6564 * The 4.1 client currently uses the same TCP connection for the
6565 * fore and backchannel.
6567 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
6570 struct nfs41_bind_conn_to_session_res res;
6571 struct rpc_message msg = {
6573 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6579 dprintk("--> %s\n", __func__);
6581 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
6582 if (unlikely(res.session == NULL)) {
6587 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6588 trace_nfs4_bind_conn_to_session(clp, status);
6590 if (memcmp(res.session->sess_id.data,
6591 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6592 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6596 if (res.dir != NFS4_CDFS4_BOTH) {
6597 dprintk("NFS: %s: Unexpected direction from server\n",
6602 if (res.use_conn_in_rdma_mode) {
6603 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6612 dprintk("<-- %s status= %d\n", __func__, status);
6617 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6618 * and operations we'd like to see to enable certain features in the allow map
6620 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6621 .how = SP4_MACH_CRED,
6622 .enforce.u.words = {
6623 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6624 1 << (OP_EXCHANGE_ID - 32) |
6625 1 << (OP_CREATE_SESSION - 32) |
6626 1 << (OP_DESTROY_SESSION - 32) |
6627 1 << (OP_DESTROY_CLIENTID - 32)
6630 [0] = 1 << (OP_CLOSE) |
6633 [1] = 1 << (OP_SECINFO - 32) |
6634 1 << (OP_SECINFO_NO_NAME - 32) |
6635 1 << (OP_TEST_STATEID - 32) |
6636 1 << (OP_FREE_STATEID - 32) |
6637 1 << (OP_WRITE - 32)
6642 * Select the state protection mode for client `clp' given the server results
6643 * from exchange_id in `sp'.
6645 * Returns 0 on success, negative errno otherwise.
6647 static int nfs4_sp4_select_mode(struct nfs_client *clp,
6648 struct nfs41_state_protection *sp)
6650 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6651 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6652 1 << (OP_EXCHANGE_ID - 32) |
6653 1 << (OP_CREATE_SESSION - 32) |
6654 1 << (OP_DESTROY_SESSION - 32) |
6655 1 << (OP_DESTROY_CLIENTID - 32)
6659 if (sp->how == SP4_MACH_CRED) {
6660 /* Print state protect result */
6661 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6662 for (i = 0; i <= LAST_NFS4_OP; i++) {
6663 if (test_bit(i, sp->enforce.u.longs))
6664 dfprintk(MOUNT, " enforce op %d\n", i);
6665 if (test_bit(i, sp->allow.u.longs))
6666 dfprintk(MOUNT, " allow op %d\n", i);
6669 /* make sure nothing is on enforce list that isn't supported */
6670 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6671 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6672 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6678 * Minimal mode - state operations are allowed to use machine
6679 * credential. Note this already happens by default, so the
6680 * client doesn't have to do anything more than the negotiation.
6682 * NOTE: we don't care if EXCHANGE_ID is in the list -
6683 * we're already using the machine cred for exchange_id
6684 * and will never use a different cred.
6686 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6687 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6688 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6689 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6690 dfprintk(MOUNT, "sp4_mach_cred:\n");
6691 dfprintk(MOUNT, " minimal mode enabled\n");
6692 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6694 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6698 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6699 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6700 dfprintk(MOUNT, " cleanup mode enabled\n");
6701 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6704 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6705 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6706 dfprintk(MOUNT, " secinfo mode enabled\n");
6707 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6710 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6711 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6712 dfprintk(MOUNT, " stateid mode enabled\n");
6713 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6716 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6717 dfprintk(MOUNT, " write mode enabled\n");
6718 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6721 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6722 dfprintk(MOUNT, " commit mode enabled\n");
6723 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6731 * _nfs4_proc_exchange_id()
6733 * Wrapper for EXCHANGE_ID operation.
6735 static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6738 nfs4_verifier verifier;
6739 struct nfs41_exchange_id_args args = {
6740 .verifier = &verifier,
6742 #ifdef CONFIG_NFS_V4_1_MIGRATION
6743 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6744 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6745 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6747 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6748 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6751 struct nfs41_exchange_id_res res = {
6755 struct rpc_message msg = {
6756 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6762 nfs4_init_boot_verifier(clp, &verifier);
6763 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6765 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6766 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6767 args.id_len, args.id);
6769 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
6771 if (unlikely(res.server_owner == NULL)) {
6776 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
6778 if (unlikely(res.server_scope == NULL)) {
6780 goto out_server_owner;
6783 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
6784 if (unlikely(res.impl_id == NULL)) {
6786 goto out_server_scope;
6791 args.state_protect.how = SP4_NONE;
6795 args.state_protect = nfs4_sp4_mach_cred_request;
6802 goto out_server_scope;
6805 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6806 trace_nfs4_exchange_id(clp, status);
6808 status = nfs4_check_cl_exchange_flags(res.flags);
6811 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6814 clp->cl_clientid = res.clientid;
6815 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6816 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6817 clp->cl_seqid = res.seqid;
6819 kfree(clp->cl_serverowner);
6820 clp->cl_serverowner = res.server_owner;
6821 res.server_owner = NULL;
6823 /* use the most recent implementation id */
6824 kfree(clp->cl_implid);
6825 clp->cl_implid = res.impl_id;
6827 if (clp->cl_serverscope != NULL &&
6828 !nfs41_same_server_scope(clp->cl_serverscope,
6829 res.server_scope)) {
6830 dprintk("%s: server_scope mismatch detected\n",
6832 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
6833 kfree(clp->cl_serverscope);
6834 clp->cl_serverscope = NULL;
6837 if (clp->cl_serverscope == NULL) {
6838 clp->cl_serverscope = res.server_scope;
6845 kfree(res.server_owner);
6847 kfree(res.server_scope);
6849 if (clp->cl_implid != NULL)
6850 dprintk("NFS reply exchange_id: Server Implementation ID: "
6851 "domain: %s, name: %s, date: %llu,%u\n",
6852 clp->cl_implid->domain, clp->cl_implid->name,
6853 clp->cl_implid->date.seconds,
6854 clp->cl_implid->date.nseconds);
6855 dprintk("NFS reply exchange_id: %d\n", status);
6860 * nfs4_proc_exchange_id()
6862 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6864 * Since the clientid has expired, all compounds using sessions
6865 * associated with the stale clientid will be returning
6866 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6867 * be in some phase of session reset.
6869 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6871 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6873 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6876 /* try SP4_MACH_CRED if krb5i/p */
6877 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6878 authflavor == RPC_AUTH_GSS_KRB5P) {
6879 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6885 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6888 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6889 struct rpc_cred *cred)
6891 struct rpc_message msg = {
6892 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6898 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6899 trace_nfs4_destroy_clientid(clp, status);
6901 dprintk("NFS: Got error %d from the server %s on "
6902 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6906 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6907 struct rpc_cred *cred)
6912 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6913 ret = _nfs4_proc_destroy_clientid(clp, cred);
6915 case -NFS4ERR_DELAY:
6916 case -NFS4ERR_CLIENTID_BUSY:
6926 int nfs4_destroy_clientid(struct nfs_client *clp)
6928 struct rpc_cred *cred;
6931 if (clp->cl_mvops->minor_version < 1)
6933 if (clp->cl_exchange_flags == 0)
6935 if (clp->cl_preserve_clid)
6937 cred = nfs4_get_clid_cred(clp);
6938 ret = nfs4_proc_destroy_clientid(clp, cred);
6943 case -NFS4ERR_STALE_CLIENTID:
6944 clp->cl_exchange_flags = 0;
6950 struct nfs4_get_lease_time_data {
6951 struct nfs4_get_lease_time_args *args;
6952 struct nfs4_get_lease_time_res *res;
6953 struct nfs_client *clp;
6956 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6959 struct nfs4_get_lease_time_data *data =
6960 (struct nfs4_get_lease_time_data *)calldata;
6962 dprintk("--> %s\n", __func__);
6963 /* just setup sequence, do not trigger session recovery
6964 since we're invoked within one */
6965 nfs41_setup_sequence(data->clp->cl_session,
6966 &data->args->la_seq_args,
6967 &data->res->lr_seq_res,
6969 dprintk("<-- %s\n", __func__);
6973 * Called from nfs4_state_manager thread for session setup, so don't recover
6974 * from sequence operation or clientid errors.
6976 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6978 struct nfs4_get_lease_time_data *data =
6979 (struct nfs4_get_lease_time_data *)calldata;
6981 dprintk("--> %s\n", __func__);
6982 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6984 switch (task->tk_status) {
6985 case -NFS4ERR_DELAY:
6986 case -NFS4ERR_GRACE:
6987 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
6988 rpc_delay(task, NFS4_POLL_RETRY_MIN);
6989 task->tk_status = 0;
6991 case -NFS4ERR_RETRY_UNCACHED_REP:
6992 rpc_restart_call_prepare(task);
6995 dprintk("<-- %s\n", __func__);
6998 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
6999 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7000 .rpc_call_done = nfs4_get_lease_time_done,
7003 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7005 struct rpc_task *task;
7006 struct nfs4_get_lease_time_args args;
7007 struct nfs4_get_lease_time_res res = {
7008 .lr_fsinfo = fsinfo,
7010 struct nfs4_get_lease_time_data data = {
7015 struct rpc_message msg = {
7016 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7020 struct rpc_task_setup task_setup = {
7021 .rpc_client = clp->cl_rpcclient,
7022 .rpc_message = &msg,
7023 .callback_ops = &nfs4_get_lease_time_ops,
7024 .callback_data = &data,
7025 .flags = RPC_TASK_TIMEOUT,
7029 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
7030 nfs4_set_sequence_privileged(&args.la_seq_args);
7031 dprintk("--> %s\n", __func__);
7032 task = rpc_run_task(&task_setup);
7035 status = PTR_ERR(task);
7037 status = task->tk_status;
7040 dprintk("<-- %s return %d\n", __func__, status);
7046 * Initialize the values to be used by the client in CREATE_SESSION
7047 * If nfs4_init_session set the fore channel request and response sizes,
7050 * Set the back channel max_resp_sz_cached to zero to force the client to
7051 * always set csa_cachethis to FALSE because the current implementation
7052 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7054 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7056 unsigned int max_rqst_sz, max_resp_sz;
7058 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7059 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
7061 /* Fore channel attributes */
7062 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7063 args->fc_attrs.max_resp_sz = max_resp_sz;
7064 args->fc_attrs.max_ops = NFS4_MAX_OPS;
7065 args->fc_attrs.max_reqs = max_session_slots;
7067 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
7068 "max_ops=%u max_reqs=%u\n",
7070 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
7071 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
7073 /* Back channel attributes */
7074 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7075 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7076 args->bc_attrs.max_resp_sz_cached = 0;
7077 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7078 args->bc_attrs.max_reqs = 1;
7080 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7081 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7083 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7084 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7085 args->bc_attrs.max_reqs);
7088 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
7090 struct nfs4_channel_attrs *sent = &args->fc_attrs;
7091 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
7093 if (rcvd->max_resp_sz > sent->max_resp_sz)
7096 * Our requested max_ops is the minimum we need; we're not
7097 * prepared to break up compounds into smaller pieces than that.
7098 * So, no point even trying to continue if the server won't
7101 if (rcvd->max_ops < sent->max_ops)
7103 if (rcvd->max_reqs == 0)
7105 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7106 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
7110 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
7112 struct nfs4_channel_attrs *sent = &args->bc_attrs;
7113 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
7115 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7117 if (rcvd->max_resp_sz < sent->max_resp_sz)
7119 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7121 /* These would render the backchannel useless: */
7122 if (rcvd->max_ops != sent->max_ops)
7124 if (rcvd->max_reqs != sent->max_reqs)
7129 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7130 struct nfs4_session *session)
7134 ret = nfs4_verify_fore_channel_attrs(args, session);
7137 return nfs4_verify_back_channel_attrs(args, session);
7140 static int _nfs4_proc_create_session(struct nfs_client *clp,
7141 struct rpc_cred *cred)
7143 struct nfs4_session *session = clp->cl_session;
7144 struct nfs41_create_session_args args = {
7146 .cb_program = NFS4_CALLBACK,
7148 struct nfs41_create_session_res res = {
7151 struct rpc_message msg = {
7152 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7159 nfs4_init_channel_attrs(&args);
7160 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
7162 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7163 trace_nfs4_create_session(clp, status);
7166 /* Verify the session's negotiated channel_attrs values */
7167 status = nfs4_verify_channel_attrs(&args, session);
7168 /* Increment the clientid slot sequence id */
7176 * Issues a CREATE_SESSION operation to the server.
7177 * It is the responsibility of the caller to verify the session is
7178 * expired before calling this routine.
7180 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
7184 struct nfs4_session *session = clp->cl_session;
7186 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7188 status = _nfs4_proc_create_session(clp, cred);
7192 /* Init or reset the session slot tables */
7193 status = nfs4_setup_session_slot_tables(session);
7194 dprintk("slot table setup returned %d\n", status);
7198 ptr = (unsigned *)&session->sess_id.data[0];
7199 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7200 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
7202 dprintk("<-- %s\n", __func__);
7207 * Issue the over-the-wire RPC DESTROY_SESSION.
7208 * The caller must serialize access to this routine.
7210 int nfs4_proc_destroy_session(struct nfs4_session *session,
7211 struct rpc_cred *cred)
7213 struct rpc_message msg = {
7214 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7215 .rpc_argp = session,
7220 dprintk("--> nfs4_proc_destroy_session\n");
7222 /* session is still being setup */
7223 if (session->clp->cl_cons_state != NFS_CS_READY)
7226 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7227 trace_nfs4_destroy_session(session->clp, status);
7230 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
7231 "Session has been destroyed regardless...\n", status);
7233 dprintk("<-- nfs4_proc_destroy_session\n");
7238 * Renew the cl_session lease.
7240 struct nfs4_sequence_data {
7241 struct nfs_client *clp;
7242 struct nfs4_sequence_args args;
7243 struct nfs4_sequence_res res;
7246 static void nfs41_sequence_release(void *data)
7248 struct nfs4_sequence_data *calldata = data;
7249 struct nfs_client *clp = calldata->clp;
7251 if (atomic_read(&clp->cl_count) > 1)
7252 nfs4_schedule_state_renewal(clp);
7253 nfs_put_client(clp);
7257 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7259 switch(task->tk_status) {
7260 case -NFS4ERR_DELAY:
7261 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7264 nfs4_schedule_lease_recovery(clp);
7269 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
7271 struct nfs4_sequence_data *calldata = data;
7272 struct nfs_client *clp = calldata->clp;
7274 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7277 trace_nfs4_sequence(clp, task->tk_status);
7278 if (task->tk_status < 0) {
7279 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7280 if (atomic_read(&clp->cl_count) == 1)
7283 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7284 rpc_restart_call_prepare(task);
7288 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7290 dprintk("<-- %s\n", __func__);
7293 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7295 struct nfs4_sequence_data *calldata = data;
7296 struct nfs_client *clp = calldata->clp;
7297 struct nfs4_sequence_args *args;
7298 struct nfs4_sequence_res *res;
7300 args = task->tk_msg.rpc_argp;
7301 res = task->tk_msg.rpc_resp;
7303 nfs41_setup_sequence(clp->cl_session, args, res, task);
7306 static const struct rpc_call_ops nfs41_sequence_ops = {
7307 .rpc_call_done = nfs41_sequence_call_done,
7308 .rpc_call_prepare = nfs41_sequence_prepare,
7309 .rpc_release = nfs41_sequence_release,
7312 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7313 struct rpc_cred *cred,
7316 struct nfs4_sequence_data *calldata;
7317 struct rpc_message msg = {
7318 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7321 struct rpc_task_setup task_setup_data = {
7322 .rpc_client = clp->cl_rpcclient,
7323 .rpc_message = &msg,
7324 .callback_ops = &nfs41_sequence_ops,
7325 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
7328 if (!atomic_inc_not_zero(&clp->cl_count))
7329 return ERR_PTR(-EIO);
7330 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7331 if (calldata == NULL) {
7332 nfs_put_client(clp);
7333 return ERR_PTR(-ENOMEM);
7335 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
7337 nfs4_set_sequence_privileged(&calldata->args);
7338 msg.rpc_argp = &calldata->args;
7339 msg.rpc_resp = &calldata->res;
7340 calldata->clp = clp;
7341 task_setup_data.callback_data = calldata;
7343 return rpc_run_task(&task_setup_data);
7346 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
7348 struct rpc_task *task;
7351 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
7353 task = _nfs41_proc_sequence(clp, cred, false);
7355 ret = PTR_ERR(task);
7357 rpc_put_task_async(task);
7358 dprintk("<-- %s status=%d\n", __func__, ret);
7362 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7364 struct rpc_task *task;
7367 task = _nfs41_proc_sequence(clp, cred, true);
7369 ret = PTR_ERR(task);
7372 ret = rpc_wait_for_completion_task(task);
7374 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7376 if (task->tk_status == 0)
7377 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
7378 ret = task->tk_status;
7382 dprintk("<-- %s status=%d\n", __func__, ret);
7386 struct nfs4_reclaim_complete_data {
7387 struct nfs_client *clp;
7388 struct nfs41_reclaim_complete_args arg;
7389 struct nfs41_reclaim_complete_res res;
7392 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7394 struct nfs4_reclaim_complete_data *calldata = data;
7396 nfs41_setup_sequence(calldata->clp->cl_session,
7397 &calldata->arg.seq_args,
7398 &calldata->res.seq_res,
7402 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7404 switch(task->tk_status) {
7406 case -NFS4ERR_COMPLETE_ALREADY:
7407 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7409 case -NFS4ERR_DELAY:
7410 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7412 case -NFS4ERR_RETRY_UNCACHED_REP:
7415 nfs4_schedule_lease_recovery(clp);
7420 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7422 struct nfs4_reclaim_complete_data *calldata = data;
7423 struct nfs_client *clp = calldata->clp;
7424 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7426 dprintk("--> %s\n", __func__);
7427 if (!nfs41_sequence_done(task, res))
7430 trace_nfs4_reclaim_complete(clp, task->tk_status);
7431 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7432 rpc_restart_call_prepare(task);
7435 dprintk("<-- %s\n", __func__);
7438 static void nfs4_free_reclaim_complete_data(void *data)
7440 struct nfs4_reclaim_complete_data *calldata = data;
7445 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7446 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7447 .rpc_call_done = nfs4_reclaim_complete_done,
7448 .rpc_release = nfs4_free_reclaim_complete_data,
7452 * Issue a global reclaim complete.
7454 static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7455 struct rpc_cred *cred)
7457 struct nfs4_reclaim_complete_data *calldata;
7458 struct rpc_task *task;
7459 struct rpc_message msg = {
7460 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
7463 struct rpc_task_setup task_setup_data = {
7464 .rpc_client = clp->cl_rpcclient,
7465 .rpc_message = &msg,
7466 .callback_ops = &nfs4_reclaim_complete_call_ops,
7467 .flags = RPC_TASK_ASYNC,
7469 int status = -ENOMEM;
7471 dprintk("--> %s\n", __func__);
7472 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7473 if (calldata == NULL)
7475 calldata->clp = clp;
7476 calldata->arg.one_fs = 0;
7478 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
7479 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
7480 msg.rpc_argp = &calldata->arg;
7481 msg.rpc_resp = &calldata->res;
7482 task_setup_data.callback_data = calldata;
7483 task = rpc_run_task(&task_setup_data);
7485 status = PTR_ERR(task);
7488 status = nfs4_wait_for_completion_rpc_task(task);
7490 status = task->tk_status;
7494 dprintk("<-- %s status=%d\n", __func__, status);
7499 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7501 struct nfs4_layoutget *lgp = calldata;
7502 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
7503 struct nfs4_session *session = nfs4_get_session(server);
7505 dprintk("--> %s\n", __func__);
7506 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7507 * right now covering the LAYOUTGET we are about to send.
7508 * However, that is not so catastrophic, and there seems
7509 * to be no way to prevent it completely.
7511 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
7512 &lgp->res.seq_res, task))
7514 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7515 NFS_I(lgp->args.inode)->layout,
7516 lgp->args.ctx->state)) {
7517 rpc_exit(task, NFS4_OK);
7521 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7523 struct nfs4_layoutget *lgp = calldata;
7524 struct inode *inode = lgp->args.inode;
7525 struct nfs_server *server = NFS_SERVER(inode);
7526 struct pnfs_layout_hdr *lo;
7527 struct nfs4_state *state = NULL;
7528 unsigned long timeo, now, giveup;
7530 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
7532 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
7535 switch (task->tk_status) {
7539 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7540 * (or clients) writing to the same RAID stripe
7542 case -NFS4ERR_LAYOUTTRYLATER:
7544 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7545 * existing layout before getting a new one).
7547 case -NFS4ERR_RECALLCONFLICT:
7548 timeo = rpc_get_timeout(task->tk_client);
7549 giveup = lgp->args.timestamp + timeo;
7551 if (time_after(giveup, now)) {
7552 unsigned long delay;
7555 * - Not less then NFS4_POLL_RETRY_MIN.
7556 * - One last time a jiffie before we give up
7557 * - exponential backoff (time_now minus start_attempt)
7559 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7560 min((giveup - now - 1),
7561 now - lgp->args.timestamp));
7563 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7565 rpc_delay(task, delay);
7566 task->tk_status = 0;
7567 rpc_restart_call_prepare(task);
7568 goto out; /* Do not call nfs4_async_handle_error() */
7571 case -NFS4ERR_EXPIRED:
7572 case -NFS4ERR_BAD_STATEID:
7573 spin_lock(&inode->i_lock);
7574 lo = NFS_I(inode)->layout;
7575 if (!lo || list_empty(&lo->plh_segs)) {
7576 spin_unlock(&inode->i_lock);
7577 /* If the open stateid was bad, then recover it. */
7578 state = lgp->args.ctx->state;
7582 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7583 spin_unlock(&inode->i_lock);
7584 /* Mark the bad layout state as invalid, then
7585 * retry using the open stateid. */
7586 pnfs_free_lseg_list(&head);
7589 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
7590 rpc_restart_call_prepare(task);
7592 dprintk("<-- %s\n", __func__);
7595 static size_t max_response_pages(struct nfs_server *server)
7597 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7598 return nfs_page_array_len(0, max_resp_sz);
7601 static void nfs4_free_pages(struct page **pages, size_t size)
7608 for (i = 0; i < size; i++) {
7611 __free_page(pages[i]);
7616 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7618 struct page **pages;
7621 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7623 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7627 for (i = 0; i < size; i++) {
7628 pages[i] = alloc_page(gfp_flags);
7630 dprintk("%s: failed to allocate page\n", __func__);
7631 nfs4_free_pages(pages, size);
7639 static void nfs4_layoutget_release(void *calldata)
7641 struct nfs4_layoutget *lgp = calldata;
7642 struct inode *inode = lgp->args.inode;
7643 struct nfs_server *server = NFS_SERVER(inode);
7644 size_t max_pages = max_response_pages(server);
7646 dprintk("--> %s\n", __func__);
7647 nfs4_free_pages(lgp->args.layout.pages, max_pages);
7648 pnfs_put_layout_hdr(NFS_I(inode)->layout);
7649 put_nfs_open_context(lgp->args.ctx);
7651 dprintk("<-- %s\n", __func__);
7654 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7655 .rpc_call_prepare = nfs4_layoutget_prepare,
7656 .rpc_call_done = nfs4_layoutget_done,
7657 .rpc_release = nfs4_layoutget_release,
7660 struct pnfs_layout_segment *
7661 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
7663 struct inode *inode = lgp->args.inode;
7664 struct nfs_server *server = NFS_SERVER(inode);
7665 size_t max_pages = max_response_pages(server);
7666 struct rpc_task *task;
7667 struct rpc_message msg = {
7668 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7669 .rpc_argp = &lgp->args,
7670 .rpc_resp = &lgp->res,
7671 .rpc_cred = lgp->cred,
7673 struct rpc_task_setup task_setup_data = {
7674 .rpc_client = server->client,
7675 .rpc_message = &msg,
7676 .callback_ops = &nfs4_layoutget_call_ops,
7677 .callback_data = lgp,
7678 .flags = RPC_TASK_ASYNC,
7680 struct pnfs_layout_segment *lseg = NULL;
7683 dprintk("--> %s\n", __func__);
7685 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7686 if (!lgp->args.layout.pages) {
7687 nfs4_layoutget_release(lgp);
7688 return ERR_PTR(-ENOMEM);
7690 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
7691 lgp->args.timestamp = jiffies;
7693 lgp->res.layoutp = &lgp->args.layout;
7694 lgp->res.seq_res.sr_slot = NULL;
7695 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
7697 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7698 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7700 task = rpc_run_task(&task_setup_data);
7702 return ERR_CAST(task);
7703 status = nfs4_wait_for_completion_rpc_task(task);
7705 status = task->tk_status;
7706 trace_nfs4_layoutget(lgp->args.ctx,
7710 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7711 if (status == 0 && lgp->res.layoutp->len)
7712 lseg = pnfs_layout_process(lgp);
7714 dprintk("<-- %s status=%d\n", __func__, status);
7716 return ERR_PTR(status);
7721 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7723 struct nfs4_layoutreturn *lrp = calldata;
7725 dprintk("--> %s\n", __func__);
7726 nfs41_setup_sequence(lrp->clp->cl_session,
7727 &lrp->args.seq_args,
7732 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7734 struct nfs4_layoutreturn *lrp = calldata;
7735 struct nfs_server *server;
7737 dprintk("--> %s\n", __func__);
7739 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
7742 server = NFS_SERVER(lrp->args.inode);
7743 switch (task->tk_status) {
7745 task->tk_status = 0;
7748 case -NFS4ERR_DELAY:
7749 if (nfs4_async_handle_error(task, server, NULL) != -EAGAIN)
7751 rpc_restart_call_prepare(task);
7754 dprintk("<-- %s\n", __func__);
7757 static void nfs4_layoutreturn_release(void *calldata)
7759 struct nfs4_layoutreturn *lrp = calldata;
7760 struct pnfs_layout_hdr *lo = lrp->args.layout;
7762 dprintk("--> %s\n", __func__);
7763 spin_lock(&lo->plh_inode->i_lock);
7764 if (lrp->res.lrs_present)
7765 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7766 lo->plh_block_lgets--;
7767 spin_unlock(&lo->plh_inode->i_lock);
7768 pnfs_put_layout_hdr(lrp->args.layout);
7770 dprintk("<-- %s\n", __func__);
7773 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7774 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7775 .rpc_call_done = nfs4_layoutreturn_done,
7776 .rpc_release = nfs4_layoutreturn_release,
7779 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
7781 struct rpc_task *task;
7782 struct rpc_message msg = {
7783 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7784 .rpc_argp = &lrp->args,
7785 .rpc_resp = &lrp->res,
7786 .rpc_cred = lrp->cred,
7788 struct rpc_task_setup task_setup_data = {
7789 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
7790 .rpc_message = &msg,
7791 .callback_ops = &nfs4_layoutreturn_call_ops,
7792 .callback_data = lrp,
7796 dprintk("--> %s\n", __func__);
7797 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
7798 task = rpc_run_task(&task_setup_data);
7800 return PTR_ERR(task);
7801 status = task->tk_status;
7802 trace_nfs4_layoutreturn(lrp->args.inode, status);
7803 dprintk("<-- %s status=%d\n", __func__, status);
7809 * Retrieve the list of Data Server devices from the MDS.
7811 static int _nfs4_getdevicelist(struct nfs_server *server,
7812 const struct nfs_fh *fh,
7813 struct pnfs_devicelist *devlist)
7815 struct nfs4_getdevicelist_args args = {
7817 .layoutclass = server->pnfs_curr_ld->id,
7819 struct nfs4_getdevicelist_res res = {
7822 struct rpc_message msg = {
7823 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
7829 dprintk("--> %s\n", __func__);
7830 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
7832 dprintk("<-- %s status=%d\n", __func__, status);
7836 int nfs4_proc_getdevicelist(struct nfs_server *server,
7837 const struct nfs_fh *fh,
7838 struct pnfs_devicelist *devlist)
7840 struct nfs4_exception exception = { };
7844 err = nfs4_handle_exception(server,
7845 _nfs4_getdevicelist(server, fh, devlist),
7847 } while (exception.retry);
7849 dprintk("%s: err=%d, num_devs=%u\n", __func__,
7850 err, devlist->num_devs);
7854 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
7857 _nfs4_proc_getdeviceinfo(struct nfs_server *server,
7858 struct pnfs_device *pdev,
7859 struct rpc_cred *cred)
7861 struct nfs4_getdeviceinfo_args args = {
7864 struct nfs4_getdeviceinfo_res res = {
7867 struct rpc_message msg = {
7868 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7875 dprintk("--> %s\n", __func__);
7876 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
7877 dprintk("<-- %s status=%d\n", __func__, status);
7882 int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7883 struct pnfs_device *pdev,
7884 struct rpc_cred *cred)
7886 struct nfs4_exception exception = { };
7890 err = nfs4_handle_exception(server,
7891 _nfs4_proc_getdeviceinfo(server, pdev, cred),
7893 } while (exception.retry);
7896 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7898 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7900 struct nfs4_layoutcommit_data *data = calldata;
7901 struct nfs_server *server = NFS_SERVER(data->args.inode);
7902 struct nfs4_session *session = nfs4_get_session(server);
7904 nfs41_setup_sequence(session,
7905 &data->args.seq_args,
7911 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7913 struct nfs4_layoutcommit_data *data = calldata;
7914 struct nfs_server *server = NFS_SERVER(data->args.inode);
7916 if (!nfs41_sequence_done(task, &data->res.seq_res))
7919 switch (task->tk_status) { /* Just ignore these failures */
7920 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7921 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7922 case -NFS4ERR_BADLAYOUT: /* no layout */
7923 case -NFS4ERR_GRACE: /* loca_recalim always false */
7924 task->tk_status = 0;
7928 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
7929 rpc_restart_call_prepare(task);
7935 static void nfs4_layoutcommit_release(void *calldata)
7937 struct nfs4_layoutcommit_data *data = calldata;
7939 pnfs_cleanup_layoutcommit(data);
7940 nfs_post_op_update_inode_force_wcc(data->args.inode,
7942 put_rpccred(data->cred);
7946 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7947 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7948 .rpc_call_done = nfs4_layoutcommit_done,
7949 .rpc_release = nfs4_layoutcommit_release,
7953 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
7955 struct rpc_message msg = {
7956 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7957 .rpc_argp = &data->args,
7958 .rpc_resp = &data->res,
7959 .rpc_cred = data->cred,
7961 struct rpc_task_setup task_setup_data = {
7962 .task = &data->task,
7963 .rpc_client = NFS_CLIENT(data->args.inode),
7964 .rpc_message = &msg,
7965 .callback_ops = &nfs4_layoutcommit_ops,
7966 .callback_data = data,
7967 .flags = RPC_TASK_ASYNC,
7969 struct rpc_task *task;
7972 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7973 "lbw: %llu inode %lu\n",
7974 data->task.tk_pid, sync,
7975 data->args.lastbytewritten,
7976 data->args.inode->i_ino);
7978 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
7979 task = rpc_run_task(&task_setup_data);
7981 return PTR_ERR(task);
7984 status = nfs4_wait_for_completion_rpc_task(task);
7987 status = task->tk_status;
7988 trace_nfs4_layoutcommit(data->args.inode, status);
7990 dprintk("%s: status %d\n", __func__, status);
7996 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7997 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8000 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8001 struct nfs_fsinfo *info,
8002 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
8004 struct nfs41_secinfo_no_name_args args = {
8005 .style = SECINFO_STYLE_CURRENT_FH,
8007 struct nfs4_secinfo_res res = {
8010 struct rpc_message msg = {
8011 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8015 struct rpc_clnt *clnt = server->client;
8016 struct rpc_cred *cred = NULL;
8019 if (use_integrity) {
8020 clnt = server->nfs_client->cl_rpcclient;
8021 cred = nfs4_get_clid_cred(server->nfs_client);
8022 msg.rpc_cred = cred;
8025 dprintk("--> %s\n", __func__);
8026 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8028 dprintk("<-- %s status=%d\n", __func__, status);
8037 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8038 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8040 struct nfs4_exception exception = { };
8043 /* first try using integrity protection */
8044 err = -NFS4ERR_WRONGSEC;
8046 /* try to use integrity protection with machine cred */
8047 if (_nfs4_is_integrity_protected(server->nfs_client))
8048 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8052 * if unable to use integrity protection, or SECINFO with
8053 * integrity protection returns NFS4ERR_WRONGSEC (which is
8054 * disallowed by spec, but exists in deployed servers) use
8055 * the current filesystem's rpc_client and the user cred.
8057 if (err == -NFS4ERR_WRONGSEC)
8058 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8063 case -NFS4ERR_WRONGSEC:
8067 err = nfs4_handle_exception(server, err, &exception);
8069 } while (exception.retry);
8075 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8076 struct nfs_fsinfo *info)
8080 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
8081 struct nfs4_secinfo_flavors *flavors;
8082 struct nfs4_secinfo4 *secinfo;
8085 page = alloc_page(GFP_KERNEL);
8091 flavors = page_address(page);
8092 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8095 * Fall back on "guess and check" method if
8096 * the server doesn't support SECINFO_NO_NAME
8098 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
8099 err = nfs4_find_root_sec(server, fhandle, info);
8105 for (i = 0; i < flavors->num_flavors; i++) {
8106 secinfo = &flavors->flavors[i];
8108 switch (secinfo->flavor) {
8112 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8113 &secinfo->flavor_info);
8116 flavor = RPC_AUTH_MAXFLAVOR;
8120 if (!nfs_auth_info_match(&server->auth_info, flavor))
8121 flavor = RPC_AUTH_MAXFLAVOR;
8123 if (flavor != RPC_AUTH_MAXFLAVOR) {
8124 err = nfs4_lookup_root_sec(server, fhandle,
8131 if (flavor == RPC_AUTH_MAXFLAVOR)
8142 static int _nfs41_test_stateid(struct nfs_server *server,
8143 nfs4_stateid *stateid,
8144 struct rpc_cred *cred)
8147 struct nfs41_test_stateid_args args = {
8150 struct nfs41_test_stateid_res res;
8151 struct rpc_message msg = {
8152 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8157 struct rpc_clnt *rpc_client = server->client;
8159 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8162 dprintk("NFS call test_stateid %p\n", stateid);
8163 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8164 nfs4_set_sequence_privileged(&args.seq_args);
8165 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8166 &args.seq_args, &res.seq_res);
8167 if (status != NFS_OK) {
8168 dprintk("NFS reply test_stateid: failed, %d\n", status);
8171 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
8176 * nfs41_test_stateid - perform a TEST_STATEID operation
8178 * @server: server / transport on which to perform the operation
8179 * @stateid: state ID to test
8182 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8183 * Otherwise a negative NFS4ERR value is returned if the operation
8184 * failed or the state ID is not currently valid.
8186 static int nfs41_test_stateid(struct nfs_server *server,
8187 nfs4_stateid *stateid,
8188 struct rpc_cred *cred)
8190 struct nfs4_exception exception = { };
8193 err = _nfs41_test_stateid(server, stateid, cred);
8194 if (err != -NFS4ERR_DELAY)
8196 nfs4_handle_exception(server, err, &exception);
8197 } while (exception.retry);
8201 struct nfs_free_stateid_data {
8202 struct nfs_server *server;
8203 struct nfs41_free_stateid_args args;
8204 struct nfs41_free_stateid_res res;
8207 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8209 struct nfs_free_stateid_data *data = calldata;
8210 nfs41_setup_sequence(nfs4_get_session(data->server),
8211 &data->args.seq_args,
8216 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8218 struct nfs_free_stateid_data *data = calldata;
8220 nfs41_sequence_done(task, &data->res.seq_res);
8222 switch (task->tk_status) {
8223 case -NFS4ERR_DELAY:
8224 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
8225 rpc_restart_call_prepare(task);
8229 static void nfs41_free_stateid_release(void *calldata)
8234 static const struct rpc_call_ops nfs41_free_stateid_ops = {
8235 .rpc_call_prepare = nfs41_free_stateid_prepare,
8236 .rpc_call_done = nfs41_free_stateid_done,
8237 .rpc_release = nfs41_free_stateid_release,
8240 static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8241 nfs4_stateid *stateid,
8242 struct rpc_cred *cred,
8245 struct rpc_message msg = {
8246 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
8249 struct rpc_task_setup task_setup = {
8250 .rpc_client = server->client,
8251 .rpc_message = &msg,
8252 .callback_ops = &nfs41_free_stateid_ops,
8253 .flags = RPC_TASK_ASYNC,
8255 struct nfs_free_stateid_data *data;
8257 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8258 &task_setup.rpc_client, &msg);
8260 dprintk("NFS call free_stateid %p\n", stateid);
8261 data = kmalloc(sizeof(*data), GFP_NOFS);
8263 return ERR_PTR(-ENOMEM);
8264 data->server = server;
8265 nfs4_stateid_copy(&data->args.stateid, stateid);
8267 task_setup.callback_data = data;
8269 msg.rpc_argp = &data->args;
8270 msg.rpc_resp = &data->res;
8271 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
8273 nfs4_set_sequence_privileged(&data->args.seq_args);
8275 return rpc_run_task(&task_setup);
8279 * nfs41_free_stateid - perform a FREE_STATEID operation
8281 * @server: server / transport on which to perform the operation
8282 * @stateid: state ID to release
8285 * Returns NFS_OK if the server freed "stateid". Otherwise a
8286 * negative NFS4ERR value is returned.
8288 static int nfs41_free_stateid(struct nfs_server *server,
8289 nfs4_stateid *stateid,
8290 struct rpc_cred *cred)
8292 struct rpc_task *task;
8295 task = _nfs41_free_stateid(server, stateid, cred, true);
8297 return PTR_ERR(task);
8298 ret = rpc_wait_for_completion_task(task);
8300 ret = task->tk_status;
8306 nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
8308 struct rpc_task *task;
8309 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
8311 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
8312 nfs4_free_lock_state(server, lsp);
8318 static bool nfs41_match_stateid(const nfs4_stateid *s1,
8319 const nfs4_stateid *s2)
8321 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
8324 if (s1->seqid == s2->seqid)
8326 if (s1->seqid == 0 || s2->seqid == 0)
8332 #endif /* CONFIG_NFS_V4_1 */
8334 static bool nfs4_match_stateid(const nfs4_stateid *s1,
8335 const nfs4_stateid *s2)
8337 return nfs4_stateid_match(s1, s2);
8341 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
8342 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8343 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8344 .recover_open = nfs4_open_reclaim,
8345 .recover_lock = nfs4_lock_reclaim,
8346 .establish_clid = nfs4_init_clientid,
8347 .detect_trunking = nfs40_discover_server_trunking,
8350 #if defined(CONFIG_NFS_V4_1)
8351 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
8352 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8353 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8354 .recover_open = nfs4_open_reclaim,
8355 .recover_lock = nfs4_lock_reclaim,
8356 .establish_clid = nfs41_init_clientid,
8357 .reclaim_complete = nfs41_proc_reclaim_complete,
8358 .detect_trunking = nfs41_discover_server_trunking,
8360 #endif /* CONFIG_NFS_V4_1 */
8362 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
8363 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8364 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8365 .recover_open = nfs4_open_expired,
8366 .recover_lock = nfs4_lock_expired,
8367 .establish_clid = nfs4_init_clientid,
8370 #if defined(CONFIG_NFS_V4_1)
8371 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
8372 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8373 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8374 .recover_open = nfs41_open_expired,
8375 .recover_lock = nfs41_lock_expired,
8376 .establish_clid = nfs41_init_clientid,
8378 #endif /* CONFIG_NFS_V4_1 */
8380 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
8381 .sched_state_renewal = nfs4_proc_async_renew,
8382 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8383 .renew_lease = nfs4_proc_renew,
8386 #if defined(CONFIG_NFS_V4_1)
8387 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
8388 .sched_state_renewal = nfs41_proc_async_sequence,
8389 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8390 .renew_lease = nfs4_proc_sequence,
8394 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
8395 .get_locations = _nfs40_proc_get_locations,
8396 .fsid_present = _nfs40_proc_fsid_present,
8399 #if defined(CONFIG_NFS_V4_1)
8400 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
8401 .get_locations = _nfs41_proc_get_locations,
8402 .fsid_present = _nfs41_proc_fsid_present,
8404 #endif /* CONFIG_NFS_V4_1 */
8406 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8408 .init_caps = NFS_CAP_READDIRPLUS
8409 | NFS_CAP_ATOMIC_OPEN
8410 | NFS_CAP_CHANGE_ATTR
8411 | NFS_CAP_POSIX_LOCK,
8412 .init_client = nfs40_init_client,
8413 .shutdown_client = nfs40_shutdown_client,
8414 .match_stateid = nfs4_match_stateid,
8415 .find_root_sec = nfs4_find_root_sec,
8416 .free_lock_state = nfs4_release_lockowner,
8417 .call_sync_ops = &nfs40_call_sync_ops,
8418 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8419 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8420 .state_renewal_ops = &nfs40_state_renewal_ops,
8421 .mig_recovery_ops = &nfs40_mig_recovery_ops,
8424 #if defined(CONFIG_NFS_V4_1)
8425 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8427 .init_caps = NFS_CAP_READDIRPLUS
8428 | NFS_CAP_ATOMIC_OPEN
8429 | NFS_CAP_CHANGE_ATTR
8430 | NFS_CAP_POSIX_LOCK
8431 | NFS_CAP_STATEID_NFSV41
8432 | NFS_CAP_ATOMIC_OPEN_V1,
8433 .init_client = nfs41_init_client,
8434 .shutdown_client = nfs41_shutdown_client,
8435 .match_stateid = nfs41_match_stateid,
8436 .find_root_sec = nfs41_find_root_sec,
8437 .free_lock_state = nfs41_free_lock_state,
8438 .call_sync_ops = &nfs41_call_sync_ops,
8439 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8440 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8441 .state_renewal_ops = &nfs41_state_renewal_ops,
8442 .mig_recovery_ops = &nfs41_mig_recovery_ops,
8446 #if defined(CONFIG_NFS_V4_2)
8447 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8449 .init_caps = NFS_CAP_READDIRPLUS
8450 | NFS_CAP_ATOMIC_OPEN
8451 | NFS_CAP_CHANGE_ATTR
8452 | NFS_CAP_POSIX_LOCK
8453 | NFS_CAP_STATEID_NFSV41
8454 | NFS_CAP_ATOMIC_OPEN_V1,
8455 .init_client = nfs41_init_client,
8456 .shutdown_client = nfs41_shutdown_client,
8457 .match_stateid = nfs41_match_stateid,
8458 .find_root_sec = nfs41_find_root_sec,
8459 .free_lock_state = nfs41_free_lock_state,
8460 .call_sync_ops = &nfs41_call_sync_ops,
8461 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8462 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8463 .state_renewal_ops = &nfs41_state_renewal_ops,
8467 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8468 [0] = &nfs_v4_0_minor_ops,
8469 #if defined(CONFIG_NFS_V4_1)
8470 [1] = &nfs_v4_1_minor_ops,
8472 #if defined(CONFIG_NFS_V4_2)
8473 [2] = &nfs_v4_2_minor_ops,
8477 static const struct inode_operations nfs4_dir_inode_operations = {
8478 .create = nfs_create,
8479 .lookup = nfs_lookup,
8480 .atomic_open = nfs_atomic_open,
8482 .unlink = nfs_unlink,
8483 .symlink = nfs_symlink,
8487 .rename = nfs_rename,
8488 .permission = nfs_permission,
8489 .getattr = nfs_getattr,
8490 .setattr = nfs_setattr,
8491 .getxattr = generic_getxattr,
8492 .setxattr = generic_setxattr,
8493 .listxattr = generic_listxattr,
8494 .removexattr = generic_removexattr,
8497 static const struct inode_operations nfs4_file_inode_operations = {
8498 .permission = nfs_permission,
8499 .getattr = nfs_getattr,
8500 .setattr = nfs_setattr,
8501 .getxattr = generic_getxattr,
8502 .setxattr = generic_setxattr,
8503 .listxattr = generic_listxattr,
8504 .removexattr = generic_removexattr,
8507 const struct nfs_rpc_ops nfs_v4_clientops = {
8508 .version = 4, /* protocol version */
8509 .dentry_ops = &nfs4_dentry_operations,
8510 .dir_inode_ops = &nfs4_dir_inode_operations,
8511 .file_inode_ops = &nfs4_file_inode_operations,
8512 .file_ops = &nfs4_file_operations,
8513 .getroot = nfs4_proc_get_root,
8514 .submount = nfs4_submount,
8515 .try_mount = nfs4_try_mount,
8516 .getattr = nfs4_proc_getattr,
8517 .setattr = nfs4_proc_setattr,
8518 .lookup = nfs4_proc_lookup,
8519 .access = nfs4_proc_access,
8520 .readlink = nfs4_proc_readlink,
8521 .create = nfs4_proc_create,
8522 .remove = nfs4_proc_remove,
8523 .unlink_setup = nfs4_proc_unlink_setup,
8524 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
8525 .unlink_done = nfs4_proc_unlink_done,
8526 .rename_setup = nfs4_proc_rename_setup,
8527 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
8528 .rename_done = nfs4_proc_rename_done,
8529 .link = nfs4_proc_link,
8530 .symlink = nfs4_proc_symlink,
8531 .mkdir = nfs4_proc_mkdir,
8532 .rmdir = nfs4_proc_remove,
8533 .readdir = nfs4_proc_readdir,
8534 .mknod = nfs4_proc_mknod,
8535 .statfs = nfs4_proc_statfs,
8536 .fsinfo = nfs4_proc_fsinfo,
8537 .pathconf = nfs4_proc_pathconf,
8538 .set_capabilities = nfs4_server_capabilities,
8539 .decode_dirent = nfs4_decode_dirent,
8540 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
8541 .read_setup = nfs4_proc_read_setup,
8542 .read_done = nfs4_read_done,
8543 .write_setup = nfs4_proc_write_setup,
8544 .write_done = nfs4_write_done,
8545 .commit_setup = nfs4_proc_commit_setup,
8546 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
8547 .commit_done = nfs4_commit_done,
8548 .lock = nfs4_proc_lock,
8549 .clear_acl_cache = nfs4_zap_acl_attr,
8550 .close_context = nfs4_close_context,
8551 .open_context = nfs4_atomic_open,
8552 .have_delegation = nfs4_have_delegation,
8553 .return_delegation = nfs4_inode_return_delegation,
8554 .alloc_client = nfs4_alloc_client,
8555 .init_client = nfs4_init_client,
8556 .free_client = nfs4_free_client,
8557 .create_server = nfs4_create_server,
8558 .clone_server = nfs_clone_server,
8561 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8562 .prefix = XATTR_NAME_NFSV4_ACL,
8563 .list = nfs4_xattr_list_nfs4_acl,
8564 .get = nfs4_xattr_get_nfs4_acl,
8565 .set = nfs4_xattr_set_nfs4_acl,
8568 const struct xattr_handler *nfs4_xattr_handlers[] = {
8569 &nfs4_xattr_nfs4_acl_handler,
8570 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
8571 &nfs4_xattr_nfs4_label_handler,