4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #include <linux/delay.h>
40 #include <linux/errno.h>
41 #include <linux/string.h>
42 #include <linux/ratelimit.h>
43 #include <linux/printk.h>
44 #include <linux/slab.h>
45 #include <linux/sunrpc/clnt.h>
46 #include <linux/nfs.h>
47 #include <linux/nfs4.h>
48 #include <linux/nfs_fs.h>
49 #include <linux/nfs_page.h>
50 #include <linux/nfs_mount.h>
51 #include <linux/namei.h>
52 #include <linux/mount.h>
53 #include <linux/module.h>
54 #include <linux/nfs_idmap.h>
55 #include <linux/xattr.h>
56 #include <linux/utsname.h>
57 #include <linux/freezer.h>
60 #include "delegation.h"
66 #include "nfs4session.h"
69 #include "nfs4trace.h"
71 #define NFSDBG_FACILITY NFSDBG_PROC
73 #define NFS4_POLL_RETRY_MIN (HZ/10)
74 #define NFS4_POLL_RETRY_MAX (15*HZ)
77 static int _nfs4_proc_open(struct nfs4_opendata *data);
78 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
79 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
80 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *, long *);
81 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
82 static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
83 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
84 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
85 struct nfs_fattr *fattr, struct iattr *sattr,
86 struct nfs4_state *state, struct nfs4_label *ilabel,
87 struct nfs4_label *olabel);
88 #ifdef CONFIG_NFS_V4_1
89 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
91 static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
95 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
96 static inline struct nfs4_label *
97 nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
98 struct iattr *sattr, struct nfs4_label *label)
105 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
108 err = security_dentry_init_security(dentry, sattr->ia_mode,
109 &dentry->d_name, (void **)&label->label, &label->len);
116 nfs4_label_release_security(struct nfs4_label *label)
119 security_release_secctx(label->label, label->len);
121 static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
124 return server->attr_bitmask;
126 return server->attr_bitmask_nl;
129 static inline struct nfs4_label *
130 nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
131 struct iattr *sattr, struct nfs4_label *l)
134 nfs4_label_release_security(struct nfs4_label *label)
137 nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
138 { return server->attr_bitmask; }
141 /* Prevent leaks of NFSv4 errors into userland */
142 static int nfs4_map_errors(int err)
147 case -NFS4ERR_RESOURCE:
148 case -NFS4ERR_LAYOUTTRYLATER:
149 case -NFS4ERR_RECALLCONFLICT:
151 case -NFS4ERR_WRONGSEC:
152 case -NFS4ERR_WRONG_CRED:
154 case -NFS4ERR_BADOWNER:
155 case -NFS4ERR_BADNAME:
157 case -NFS4ERR_SHARE_DENIED:
159 case -NFS4ERR_MINOR_VERS_MISMATCH:
160 return -EPROTONOSUPPORT;
161 case -NFS4ERR_FILE_OPEN:
164 dprintk("%s could not handle NFSv4 error %d\n",
172 * This is our standard bitmap for GETATTR requests.
174 const u32 nfs4_fattr_bitmap[3] = {
176 | FATTR4_WORD0_CHANGE
179 | FATTR4_WORD0_FILEID,
181 | FATTR4_WORD1_NUMLINKS
183 | FATTR4_WORD1_OWNER_GROUP
184 | FATTR4_WORD1_RAWDEV
185 | FATTR4_WORD1_SPACE_USED
186 | FATTR4_WORD1_TIME_ACCESS
187 | FATTR4_WORD1_TIME_METADATA
188 | FATTR4_WORD1_TIME_MODIFY,
189 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
190 FATTR4_WORD2_SECURITY_LABEL
194 static const u32 nfs4_pnfs_open_bitmap[3] = {
196 | FATTR4_WORD0_CHANGE
199 | FATTR4_WORD0_FILEID,
201 | FATTR4_WORD1_NUMLINKS
203 | FATTR4_WORD1_OWNER_GROUP
204 | FATTR4_WORD1_RAWDEV
205 | FATTR4_WORD1_SPACE_USED
206 | FATTR4_WORD1_TIME_ACCESS
207 | FATTR4_WORD1_TIME_METADATA
208 | FATTR4_WORD1_TIME_MODIFY,
209 FATTR4_WORD2_MDSTHRESHOLD
212 static const u32 nfs4_open_noattr_bitmap[3] = {
214 | FATTR4_WORD0_CHANGE
215 | FATTR4_WORD0_FILEID,
218 const u32 nfs4_statfs_bitmap[3] = {
219 FATTR4_WORD0_FILES_AVAIL
220 | FATTR4_WORD0_FILES_FREE
221 | FATTR4_WORD0_FILES_TOTAL,
222 FATTR4_WORD1_SPACE_AVAIL
223 | FATTR4_WORD1_SPACE_FREE
224 | FATTR4_WORD1_SPACE_TOTAL
227 const u32 nfs4_pathconf_bitmap[3] = {
229 | FATTR4_WORD0_MAXNAME,
233 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
234 | FATTR4_WORD0_MAXREAD
235 | FATTR4_WORD0_MAXWRITE
236 | FATTR4_WORD0_LEASE_TIME,
237 FATTR4_WORD1_TIME_DELTA
238 | FATTR4_WORD1_FS_LAYOUT_TYPES,
239 FATTR4_WORD2_LAYOUT_BLKSIZE
242 const u32 nfs4_fs_locations_bitmap[3] = {
244 | FATTR4_WORD0_CHANGE
247 | FATTR4_WORD0_FILEID
248 | FATTR4_WORD0_FS_LOCATIONS,
250 | FATTR4_WORD1_NUMLINKS
252 | FATTR4_WORD1_OWNER_GROUP
253 | FATTR4_WORD1_RAWDEV
254 | FATTR4_WORD1_SPACE_USED
255 | FATTR4_WORD1_TIME_ACCESS
256 | FATTR4_WORD1_TIME_METADATA
257 | FATTR4_WORD1_TIME_MODIFY
258 | FATTR4_WORD1_MOUNTED_ON_FILEID,
261 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
262 struct nfs4_readdir_arg *readdir)
267 readdir->cookie = cookie;
268 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
273 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
278 * NFSv4 servers do not return entries for '.' and '..'
279 * Therefore, we fake these entries here. We let '.'
280 * have cookie 0 and '..' have cookie 1. Note that
281 * when talking to the server, we always send cookie 0
284 start = p = kmap_atomic(*readdir->pages);
287 *p++ = xdr_one; /* next */
288 *p++ = xdr_zero; /* cookie, first word */
289 *p++ = xdr_one; /* cookie, second word */
290 *p++ = xdr_one; /* entry len */
291 memcpy(p, ".\0\0\0", 4); /* entry */
293 *p++ = xdr_one; /* bitmap length */
294 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
295 *p++ = htonl(8); /* attribute buffer length */
296 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
299 *p++ = xdr_one; /* next */
300 *p++ = xdr_zero; /* cookie, first word */
301 *p++ = xdr_two; /* cookie, second word */
302 *p++ = xdr_two; /* entry len */
303 memcpy(p, "..\0\0", 4); /* entry */
305 *p++ = xdr_one; /* bitmap length */
306 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
307 *p++ = htonl(8); /* attribute buffer length */
308 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
310 readdir->pgbase = (char *)p - (char *)start;
311 readdir->count -= readdir->pgbase;
312 kunmap_atomic(start);
315 static long nfs4_update_delay(long *timeout)
319 return NFS4_POLL_RETRY_MAX;
321 *timeout = NFS4_POLL_RETRY_MIN;
322 if (*timeout > NFS4_POLL_RETRY_MAX)
323 *timeout = NFS4_POLL_RETRY_MAX;
329 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
335 freezable_schedule_timeout_killable_unsafe(
336 nfs4_update_delay(timeout));
337 if (fatal_signal_pending(current))
342 /* This is the error handling routine for processes that are allowed
345 int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
347 struct nfs_client *clp = server->nfs_client;
348 struct nfs4_state *state = exception->state;
349 struct inode *inode = exception->inode;
352 exception->retry = 0;
356 case -NFS4ERR_OPENMODE:
357 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
358 nfs4_inode_return_delegation(inode);
359 exception->retry = 1;
364 ret = nfs4_schedule_stateid_recovery(server, state);
367 goto wait_on_recovery;
368 case -NFS4ERR_DELEG_REVOKED:
369 case -NFS4ERR_ADMIN_REVOKED:
370 case -NFS4ERR_BAD_STATEID:
373 ret = nfs4_schedule_stateid_recovery(server, state);
376 goto wait_on_recovery;
377 case -NFS4ERR_EXPIRED:
379 ret = nfs4_schedule_stateid_recovery(server, state);
383 case -NFS4ERR_STALE_STATEID:
384 case -NFS4ERR_STALE_CLIENTID:
385 nfs4_schedule_lease_recovery(clp);
386 goto wait_on_recovery;
388 ret = nfs4_schedule_migration_recovery(server);
391 goto wait_on_recovery;
392 case -NFS4ERR_LEASE_MOVED:
393 nfs4_schedule_lease_moved_recovery(clp);
394 goto wait_on_recovery;
395 #if defined(CONFIG_NFS_V4_1)
396 case -NFS4ERR_BADSESSION:
397 case -NFS4ERR_BADSLOT:
398 case -NFS4ERR_BAD_HIGH_SLOT:
399 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
400 case -NFS4ERR_DEADSESSION:
401 case -NFS4ERR_SEQ_FALSE_RETRY:
402 case -NFS4ERR_SEQ_MISORDERED:
403 dprintk("%s ERROR: %d Reset session\n", __func__,
405 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
406 goto wait_on_recovery;
407 #endif /* defined(CONFIG_NFS_V4_1) */
408 case -NFS4ERR_FILE_OPEN:
409 if (exception->timeout > HZ) {
410 /* We have retried a decent amount, time to
418 ret = nfs4_delay(server->client, &exception->timeout);
421 case -NFS4ERR_RETRY_UNCACHED_REP:
422 case -NFS4ERR_OLD_STATEID:
423 exception->retry = 1;
425 case -NFS4ERR_BADOWNER:
426 /* The following works around a Linux server bug! */
427 case -NFS4ERR_BADNAME:
428 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
429 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
430 exception->retry = 1;
431 printk(KERN_WARNING "NFS: v4 server %s "
432 "does not accept raw "
434 "Reenabling the idmapper.\n",
435 server->nfs_client->cl_hostname);
438 /* We failed to handle the error */
439 return nfs4_map_errors(ret);
441 ret = nfs4_wait_clnt_recover(clp);
442 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
445 exception->retry = 1;
450 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
451 * or 'false' otherwise.
453 static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
455 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
457 if (flavor == RPC_AUTH_GSS_KRB5I ||
458 flavor == RPC_AUTH_GSS_KRB5P)
464 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
466 spin_lock(&clp->cl_lock);
467 if (time_before(clp->cl_last_renewal,timestamp))
468 clp->cl_last_renewal = timestamp;
469 spin_unlock(&clp->cl_lock);
472 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
474 do_renew_lease(server->nfs_client, timestamp);
477 struct nfs4_call_sync_data {
478 const struct nfs_server *seq_server;
479 struct nfs4_sequence_args *seq_args;
480 struct nfs4_sequence_res *seq_res;
483 static void nfs4_init_sequence(struct nfs4_sequence_args *args,
484 struct nfs4_sequence_res *res, int cache_reply)
486 args->sa_slot = NULL;
487 args->sa_cache_this = cache_reply;
488 args->sa_privileged = 0;
493 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
495 args->sa_privileged = 1;
498 static int nfs40_setup_sequence(const struct nfs_server *server,
499 struct nfs4_sequence_args *args,
500 struct nfs4_sequence_res *res,
501 struct rpc_task *task)
503 struct nfs4_slot_table *tbl = server->nfs_client->cl_slot_tbl;
504 struct nfs4_slot *slot;
506 /* slot already allocated? */
507 if (res->sr_slot != NULL)
510 spin_lock(&tbl->slot_tbl_lock);
511 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
514 slot = nfs4_alloc_slot(tbl);
516 if (slot == ERR_PTR(-ENOMEM))
517 task->tk_timeout = HZ >> 2;
520 spin_unlock(&tbl->slot_tbl_lock);
522 args->sa_slot = slot;
526 rpc_call_start(task);
530 if (args->sa_privileged)
531 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
532 NULL, RPC_PRIORITY_PRIVILEGED);
534 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
535 spin_unlock(&tbl->slot_tbl_lock);
539 static int nfs40_sequence_done(struct rpc_task *task,
540 struct nfs4_sequence_res *res)
542 struct nfs4_slot *slot = res->sr_slot;
543 struct nfs4_slot_table *tbl;
549 spin_lock(&tbl->slot_tbl_lock);
550 if (!nfs41_wake_and_assign_slot(tbl, slot))
551 nfs4_free_slot(tbl, slot);
552 spin_unlock(&tbl->slot_tbl_lock);
559 #if defined(CONFIG_NFS_V4_1)
561 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
563 struct nfs4_session *session;
564 struct nfs4_slot_table *tbl;
565 struct nfs4_slot *slot = res->sr_slot;
566 bool send_new_highest_used_slotid = false;
569 session = tbl->session;
571 spin_lock(&tbl->slot_tbl_lock);
572 /* Be nice to the server: try to ensure that the last transmitted
573 * value for highest_user_slotid <= target_highest_slotid
575 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
576 send_new_highest_used_slotid = true;
578 if (nfs41_wake_and_assign_slot(tbl, slot)) {
579 send_new_highest_used_slotid = false;
582 nfs4_free_slot(tbl, slot);
584 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
585 send_new_highest_used_slotid = false;
587 spin_unlock(&tbl->slot_tbl_lock);
589 if (send_new_highest_used_slotid)
590 nfs41_server_notify_highest_slotid_update(session->clp);
593 int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
595 struct nfs4_session *session;
596 struct nfs4_slot *slot = res->sr_slot;
597 struct nfs_client *clp;
598 bool interrupted = false;
603 /* don't increment the sequence number if the task wasn't sent */
604 if (!RPC_WAS_SENT(task))
607 session = slot->table->session;
609 if (slot->interrupted) {
610 slot->interrupted = 0;
614 trace_nfs4_sequence_done(session, res);
615 /* Check the SEQUENCE operation status */
616 switch (res->sr_status) {
618 /* Update the slot's sequence and clientid lease timer */
621 do_renew_lease(clp, res->sr_timestamp);
622 /* Check sequence flags */
623 if (res->sr_status_flags != 0)
624 nfs4_schedule_lease_recovery(clp);
625 nfs41_update_target_slotid(slot->table, slot, res);
629 * sr_status remains 1 if an RPC level error occurred.
630 * The server may or may not have processed the sequence
632 * Mark the slot as having hosted an interrupted RPC call.
634 slot->interrupted = 1;
637 /* The server detected a resend of the RPC call and
638 * returned NFS4ERR_DELAY as per Section 2.10.6.2
641 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
646 case -NFS4ERR_BADSLOT:
648 * The slot id we used was probably retired. Try again
649 * using a different slot id.
652 case -NFS4ERR_SEQ_MISORDERED:
654 * Was the last operation on this sequence interrupted?
655 * If so, retry after bumping the sequence number.
662 * Could this slot have been previously retired?
663 * If so, then the server may be expecting seq_nr = 1!
665 if (slot->seq_nr != 1) {
670 case -NFS4ERR_SEQ_FALSE_RETRY:
674 /* Just update the slot sequence no. */
678 /* The session may be reset by one of the error handlers. */
679 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
680 nfs41_sequence_free_slot(res);
684 if (rpc_restart_call_prepare(task)) {
690 if (!rpc_restart_call(task))
692 rpc_delay(task, NFS4_POLL_RETRY_MAX);
695 EXPORT_SYMBOL_GPL(nfs41_sequence_done);
697 static int nfs4_sequence_done(struct rpc_task *task,
698 struct nfs4_sequence_res *res)
700 if (res->sr_slot == NULL)
702 if (!res->sr_slot->table->session)
703 return nfs40_sequence_done(task, res);
704 return nfs41_sequence_done(task, res);
707 int nfs41_setup_sequence(struct nfs4_session *session,
708 struct nfs4_sequence_args *args,
709 struct nfs4_sequence_res *res,
710 struct rpc_task *task)
712 struct nfs4_slot *slot;
713 struct nfs4_slot_table *tbl;
715 dprintk("--> %s\n", __func__);
716 /* slot already allocated? */
717 if (res->sr_slot != NULL)
720 tbl = &session->fc_slot_table;
722 task->tk_timeout = 0;
724 spin_lock(&tbl->slot_tbl_lock);
725 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
726 !args->sa_privileged) {
727 /* The state manager will wait until the slot table is empty */
728 dprintk("%s session is draining\n", __func__);
732 slot = nfs4_alloc_slot(tbl);
734 /* If out of memory, try again in 1/4 second */
735 if (slot == ERR_PTR(-ENOMEM))
736 task->tk_timeout = HZ >> 2;
737 dprintk("<-- %s: no free slots\n", __func__);
740 spin_unlock(&tbl->slot_tbl_lock);
742 args->sa_slot = slot;
744 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
745 slot->slot_nr, slot->seq_nr);
748 res->sr_timestamp = jiffies;
749 res->sr_status_flags = 0;
751 * sr_status is only set in decode_sequence, and so will remain
752 * set to 1 if an rpc level failure occurs.
755 trace_nfs4_setup_sequence(session, args);
757 rpc_call_start(task);
760 /* Privileged tasks are queued with top priority */
761 if (args->sa_privileged)
762 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
763 NULL, RPC_PRIORITY_PRIVILEGED);
765 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
766 spin_unlock(&tbl->slot_tbl_lock);
769 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
771 static int nfs4_setup_sequence(const struct nfs_server *server,
772 struct nfs4_sequence_args *args,
773 struct nfs4_sequence_res *res,
774 struct rpc_task *task)
776 struct nfs4_session *session = nfs4_get_session(server);
780 return nfs40_setup_sequence(server, args, res, task);
782 dprintk("--> %s clp %p session %p sr_slot %u\n",
783 __func__, session->clp, session, res->sr_slot ?
784 res->sr_slot->slot_nr : NFS4_NO_SLOT);
786 ret = nfs41_setup_sequence(session, args, res, task);
788 dprintk("<-- %s status=%d\n", __func__, ret);
792 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
794 struct nfs4_call_sync_data *data = calldata;
795 struct nfs4_session *session = nfs4_get_session(data->seq_server);
797 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
799 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
802 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
804 struct nfs4_call_sync_data *data = calldata;
806 nfs41_sequence_done(task, data->seq_res);
809 static const struct rpc_call_ops nfs41_call_sync_ops = {
810 .rpc_call_prepare = nfs41_call_sync_prepare,
811 .rpc_call_done = nfs41_call_sync_done,
814 #else /* !CONFIG_NFS_V4_1 */
816 static int nfs4_setup_sequence(const struct nfs_server *server,
817 struct nfs4_sequence_args *args,
818 struct nfs4_sequence_res *res,
819 struct rpc_task *task)
821 return nfs40_setup_sequence(server, args, res, task);
824 static int nfs4_sequence_done(struct rpc_task *task,
825 struct nfs4_sequence_res *res)
827 return nfs40_sequence_done(task, res);
830 #endif /* !CONFIG_NFS_V4_1 */
832 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
834 struct nfs4_call_sync_data *data = calldata;
835 nfs4_setup_sequence(data->seq_server,
836 data->seq_args, data->seq_res, task);
839 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
841 struct nfs4_call_sync_data *data = calldata;
842 nfs4_sequence_done(task, data->seq_res);
845 static const struct rpc_call_ops nfs40_call_sync_ops = {
846 .rpc_call_prepare = nfs40_call_sync_prepare,
847 .rpc_call_done = nfs40_call_sync_done,
850 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
851 struct nfs_server *server,
852 struct rpc_message *msg,
853 struct nfs4_sequence_args *args,
854 struct nfs4_sequence_res *res)
857 struct rpc_task *task;
858 struct nfs_client *clp = server->nfs_client;
859 struct nfs4_call_sync_data data = {
860 .seq_server = server,
864 struct rpc_task_setup task_setup = {
867 .callback_ops = clp->cl_mvops->call_sync_ops,
868 .callback_data = &data
871 task = rpc_run_task(&task_setup);
875 ret = task->tk_status;
881 int nfs4_call_sync(struct rpc_clnt *clnt,
882 struct nfs_server *server,
883 struct rpc_message *msg,
884 struct nfs4_sequence_args *args,
885 struct nfs4_sequence_res *res,
888 nfs4_init_sequence(args, res, cache_reply);
889 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
892 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
894 struct nfs_inode *nfsi = NFS_I(dir);
896 spin_lock(&dir->i_lock);
897 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
898 if (!cinfo->atomic || cinfo->before != dir->i_version)
899 nfs_force_lookup_revalidate(dir);
900 dir->i_version = cinfo->after;
901 nfs_fscache_invalidate(dir);
902 spin_unlock(&dir->i_lock);
905 struct nfs4_opendata {
907 struct nfs_openargs o_arg;
908 struct nfs_openres o_res;
909 struct nfs_open_confirmargs c_arg;
910 struct nfs_open_confirmres c_res;
911 struct nfs4_string owner_name;
912 struct nfs4_string group_name;
913 struct nfs_fattr f_attr;
914 struct nfs4_label *f_label;
916 struct dentry *dentry;
917 struct nfs4_state_owner *owner;
918 struct nfs4_state *state;
920 unsigned long timestamp;
921 unsigned int rpc_done : 1;
922 unsigned int file_created : 1;
923 unsigned int is_recover : 1;
928 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
929 int err, struct nfs4_exception *exception)
933 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
935 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
936 exception->retry = 1;
940 static enum open_claim_type4
941 nfs4_map_atomic_open_claim(struct nfs_server *server,
942 enum open_claim_type4 claim)
944 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
949 case NFS4_OPEN_CLAIM_FH:
950 return NFS4_OPEN_CLAIM_NULL;
951 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
952 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
953 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
954 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
958 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
960 p->o_res.f_attr = &p->f_attr;
961 p->o_res.f_label = p->f_label;
962 p->o_res.seqid = p->o_arg.seqid;
963 p->c_res.seqid = p->c_arg.seqid;
964 p->o_res.server = p->o_arg.server;
965 p->o_res.access_request = p->o_arg.access;
966 nfs_fattr_init(&p->f_attr);
967 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
970 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
971 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
972 const struct iattr *attrs,
973 struct nfs4_label *label,
974 enum open_claim_type4 claim,
977 struct dentry *parent = dget_parent(dentry);
978 struct inode *dir = parent->d_inode;
979 struct nfs_server *server = NFS_SERVER(dir);
980 struct nfs4_opendata *p;
982 p = kzalloc(sizeof(*p), gfp_mask);
986 p->f_label = nfs4_label_alloc(server, gfp_mask);
987 if (IS_ERR(p->f_label))
990 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
991 if (IS_ERR(p->o_arg.seqid))
993 nfs_sb_active(dentry->d_sb);
994 p->dentry = dget(dentry);
997 atomic_inc(&sp->so_count);
998 p->o_arg.open_flags = flags;
999 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
1000 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1001 * will return permission denied for all bits until close */
1002 if (!(flags & O_EXCL)) {
1003 /* ask server to check for all possible rights as results
1005 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1006 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
1008 p->o_arg.clientid = server->nfs_client->cl_clientid;
1009 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1010 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
1011 p->o_arg.name = &dentry->d_name;
1012 p->o_arg.server = server;
1013 p->o_arg.bitmask = nfs4_bitmask(server, label);
1014 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1015 p->o_arg.label = label;
1016 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1017 switch (p->o_arg.claim) {
1018 case NFS4_OPEN_CLAIM_NULL:
1019 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1020 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1021 p->o_arg.fh = NFS_FH(dir);
1023 case NFS4_OPEN_CLAIM_PREVIOUS:
1024 case NFS4_OPEN_CLAIM_FH:
1025 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1026 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1027 p->o_arg.fh = NFS_FH(dentry->d_inode);
1029 if (attrs != NULL && attrs->ia_valid != 0) {
1032 p->o_arg.u.attrs = &p->attrs;
1033 memcpy(&p->attrs, attrs, sizeof(p->attrs));
1036 verf[1] = current->pid;
1037 memcpy(p->o_arg.u.verifier.data, verf,
1038 sizeof(p->o_arg.u.verifier.data));
1040 p->c_arg.fh = &p->o_res.fh;
1041 p->c_arg.stateid = &p->o_res.stateid;
1042 p->c_arg.seqid = p->o_arg.seqid;
1043 nfs4_init_opendata_res(p);
1044 kref_init(&p->kref);
1048 nfs4_label_free(p->f_label);
1056 static void nfs4_opendata_free(struct kref *kref)
1058 struct nfs4_opendata *p = container_of(kref,
1059 struct nfs4_opendata, kref);
1060 struct super_block *sb = p->dentry->d_sb;
1062 nfs_free_seqid(p->o_arg.seqid);
1063 if (p->state != NULL)
1064 nfs4_put_open_state(p->state);
1065 nfs4_put_state_owner(p->owner);
1067 nfs4_label_free(p->f_label);
1071 nfs_sb_deactive(sb);
1072 nfs_fattr_free_names(&p->f_attr);
1073 kfree(p->f_attr.mdsthreshold);
1077 static void nfs4_opendata_put(struct nfs4_opendata *p)
1080 kref_put(&p->kref, nfs4_opendata_free);
1083 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1087 ret = rpc_wait_for_completion_task(task);
1091 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
1095 if (open_mode & (O_EXCL|O_TRUNC))
1097 switch (mode & (FMODE_READ|FMODE_WRITE)) {
1099 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1100 && state->n_rdonly != 0;
1103 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1104 && state->n_wronly != 0;
1106 case FMODE_READ|FMODE_WRITE:
1107 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1108 && state->n_rdwr != 0;
1114 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
1116 if (delegation == NULL)
1118 if ((delegation->type & fmode) != fmode)
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_resync_open_stateid_locked(struct nfs4_state *state)
1172 if (state->n_wronly)
1173 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1174 if (state->n_rdonly)
1175 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1177 set_bit(NFS_O_RDWR_STATE, &state->flags);
1180 static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1181 nfs4_stateid *stateid, fmode_t fmode)
1183 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1184 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1186 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1189 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1192 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1193 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1194 clear_bit(NFS_OPEN_STATE, &state->flags);
1196 if (stateid == NULL)
1198 /* Handle races with OPEN */
1199 if (!nfs4_stateid_match_other(stateid, &state->open_stateid) ||
1200 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
1201 nfs_resync_open_stateid_locked(state);
1204 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1205 nfs4_stateid_copy(&state->stateid, stateid);
1206 nfs4_stateid_copy(&state->open_stateid, stateid);
1209 static void nfs_clear_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1211 write_seqlock(&state->seqlock);
1212 nfs_clear_open_stateid_locked(state, stateid, fmode);
1213 write_sequnlock(&state->seqlock);
1214 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1215 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1218 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1222 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1225 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1227 case FMODE_READ|FMODE_WRITE:
1228 set_bit(NFS_O_RDWR_STATE, &state->flags);
1230 if (!nfs_need_update_open_stateid(state, stateid))
1232 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1233 nfs4_stateid_copy(&state->stateid, stateid);
1234 nfs4_stateid_copy(&state->open_stateid, stateid);
1237 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1240 * Protect the call to nfs4_state_set_mode_locked and
1241 * serialise the stateid update
1243 write_seqlock(&state->seqlock);
1244 if (deleg_stateid != NULL) {
1245 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1246 set_bit(NFS_DELEGATED_STATE, &state->flags);
1248 if (open_stateid != NULL)
1249 nfs_set_open_stateid_locked(state, open_stateid, fmode);
1250 write_sequnlock(&state->seqlock);
1251 spin_lock(&state->owner->so_lock);
1252 update_open_stateflags(state, fmode);
1253 spin_unlock(&state->owner->so_lock);
1256 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
1258 struct nfs_inode *nfsi = NFS_I(state->inode);
1259 struct nfs_delegation *deleg_cur;
1262 fmode &= (FMODE_READ|FMODE_WRITE);
1265 deleg_cur = rcu_dereference(nfsi->delegation);
1266 if (deleg_cur == NULL)
1269 spin_lock(&deleg_cur->lock);
1270 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
1271 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
1272 (deleg_cur->type & fmode) != fmode)
1273 goto no_delegation_unlock;
1275 if (delegation == NULL)
1276 delegation = &deleg_cur->stateid;
1277 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1278 goto no_delegation_unlock;
1280 nfs_mark_delegation_referenced(deleg_cur);
1281 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1283 no_delegation_unlock:
1284 spin_unlock(&deleg_cur->lock);
1288 if (!ret && open_stateid != NULL) {
1289 __update_open_stateid(state, open_stateid, NULL, fmode);
1292 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1293 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1299 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1301 struct nfs_delegation *delegation;
1304 delegation = rcu_dereference(NFS_I(inode)->delegation);
1305 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1310 nfs4_inode_return_delegation(inode);
1313 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1315 struct nfs4_state *state = opendata->state;
1316 struct nfs_inode *nfsi = NFS_I(state->inode);
1317 struct nfs_delegation *delegation;
1318 int open_mode = opendata->o_arg.open_flags;
1319 fmode_t fmode = opendata->o_arg.fmode;
1320 nfs4_stateid stateid;
1324 spin_lock(&state->owner->so_lock);
1325 if (can_open_cached(state, fmode, open_mode)) {
1326 update_open_stateflags(state, fmode);
1327 spin_unlock(&state->owner->so_lock);
1328 goto out_return_state;
1330 spin_unlock(&state->owner->so_lock);
1332 delegation = rcu_dereference(nfsi->delegation);
1333 if (!can_open_delegated(delegation, fmode)) {
1337 /* Save the delegation */
1338 nfs4_stateid_copy(&stateid, &delegation->stateid);
1340 nfs_release_seqid(opendata->o_arg.seqid);
1341 if (!opendata->is_recover) {
1342 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1348 /* Try to update the stateid using the delegation */
1349 if (update_open_stateid(state, NULL, &stateid, fmode))
1350 goto out_return_state;
1353 return ERR_PTR(ret);
1355 atomic_inc(&state->count);
1360 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1362 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1363 struct nfs_delegation *delegation;
1364 int delegation_flags = 0;
1367 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1369 delegation_flags = delegation->flags;
1371 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1372 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1373 "returning a delegation for "
1374 "OPEN(CLAIM_DELEGATE_CUR)\n",
1376 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1377 nfs_inode_set_delegation(state->inode,
1378 data->owner->so_cred,
1381 nfs_inode_reclaim_delegation(state->inode,
1382 data->owner->so_cred,
1387 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1388 * and update the nfs4_state.
1390 static struct nfs4_state *
1391 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1393 struct inode *inode = data->state->inode;
1394 struct nfs4_state *state = data->state;
1397 if (!data->rpc_done) {
1398 if (data->rpc_status) {
1399 ret = data->rpc_status;
1402 /* cached opens have already been processed */
1406 ret = nfs_refresh_inode(inode, &data->f_attr);
1410 if (data->o_res.delegation_type != 0)
1411 nfs4_opendata_check_deleg(data, state);
1413 update_open_stateid(state, &data->o_res.stateid, NULL,
1415 atomic_inc(&state->count);
1419 return ERR_PTR(ret);
1423 static struct nfs4_state *
1424 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1426 struct inode *inode;
1427 struct nfs4_state *state = NULL;
1430 if (!data->rpc_done) {
1431 state = nfs4_try_open_cached(data);
1436 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1438 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1439 ret = PTR_ERR(inode);
1443 state = nfs4_get_open_state(inode, data->owner);
1446 if (data->o_res.delegation_type != 0)
1447 nfs4_opendata_check_deleg(data, state);
1448 update_open_stateid(state, &data->o_res.stateid, NULL,
1452 nfs_release_seqid(data->o_arg.seqid);
1457 return ERR_PTR(ret);
1460 static struct nfs4_state *
1461 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1463 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1464 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1465 return _nfs4_opendata_to_nfs4_state(data);
1468 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1470 struct nfs_inode *nfsi = NFS_I(state->inode);
1471 struct nfs_open_context *ctx;
1473 spin_lock(&state->inode->i_lock);
1474 list_for_each_entry(ctx, &nfsi->open_files, list) {
1475 if (ctx->state != state)
1477 get_nfs_open_context(ctx);
1478 spin_unlock(&state->inode->i_lock);
1481 spin_unlock(&state->inode->i_lock);
1482 return ERR_PTR(-ENOENT);
1485 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1486 struct nfs4_state *state, enum open_claim_type4 claim)
1488 struct nfs4_opendata *opendata;
1490 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1491 NULL, NULL, claim, GFP_NOFS);
1492 if (opendata == NULL)
1493 return ERR_PTR(-ENOMEM);
1494 opendata->state = state;
1495 atomic_inc(&state->count);
1499 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1501 struct nfs4_state *newstate;
1504 opendata->o_arg.open_flags = 0;
1505 opendata->o_arg.fmode = fmode;
1506 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1507 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1508 nfs4_init_opendata_res(opendata);
1509 ret = _nfs4_recover_proc_open(opendata);
1512 newstate = nfs4_opendata_to_nfs4_state(opendata);
1513 if (IS_ERR(newstate))
1514 return PTR_ERR(newstate);
1515 nfs4_close_state(newstate, fmode);
1520 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1522 struct nfs4_state *newstate;
1525 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1526 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1527 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1528 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1529 /* memory barrier prior to reading state->n_* */
1530 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1531 clear_bit(NFS_OPEN_STATE, &state->flags);
1533 if (state->n_rdwr != 0) {
1534 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1537 if (newstate != state)
1540 if (state->n_wronly != 0) {
1541 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1544 if (newstate != state)
1547 if (state->n_rdonly != 0) {
1548 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1551 if (newstate != state)
1555 * We may have performed cached opens for all three recoveries.
1556 * Check if we need to update the current stateid.
1558 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1559 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1560 write_seqlock(&state->seqlock);
1561 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1562 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1563 write_sequnlock(&state->seqlock);
1570 * reclaim state on the server after a reboot.
1572 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1574 struct nfs_delegation *delegation;
1575 struct nfs4_opendata *opendata;
1576 fmode_t delegation_type = 0;
1579 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1580 NFS4_OPEN_CLAIM_PREVIOUS);
1581 if (IS_ERR(opendata))
1582 return PTR_ERR(opendata);
1584 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1585 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1586 delegation_type = delegation->type;
1588 opendata->o_arg.u.delegation_type = delegation_type;
1589 status = nfs4_open_recover(opendata, state);
1590 nfs4_opendata_put(opendata);
1594 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1596 struct nfs_server *server = NFS_SERVER(state->inode);
1597 struct nfs4_exception exception = { };
1600 err = _nfs4_do_open_reclaim(ctx, state);
1601 trace_nfs4_open_reclaim(ctx, 0, err);
1602 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1604 if (err != -NFS4ERR_DELAY)
1606 nfs4_handle_exception(server, err, &exception);
1607 } while (exception.retry);
1611 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1613 struct nfs_open_context *ctx;
1616 ctx = nfs4_state_find_open_context(state);
1619 ret = nfs4_do_open_reclaim(ctx, state);
1620 put_nfs_open_context(ctx);
1624 static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1628 printk(KERN_ERR "NFS: %s: unhandled error "
1629 "%d.\n", __func__, err);
1634 case -NFS4ERR_BADSESSION:
1635 case -NFS4ERR_BADSLOT:
1636 case -NFS4ERR_BAD_HIGH_SLOT:
1637 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1638 case -NFS4ERR_DEADSESSION:
1639 set_bit(NFS_DELEGATED_STATE, &state->flags);
1640 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1642 case -NFS4ERR_STALE_CLIENTID:
1643 case -NFS4ERR_STALE_STATEID:
1644 set_bit(NFS_DELEGATED_STATE, &state->flags);
1645 case -NFS4ERR_EXPIRED:
1646 /* Don't recall a delegation if it was lost */
1647 nfs4_schedule_lease_recovery(server->nfs_client);
1649 case -NFS4ERR_MOVED:
1650 nfs4_schedule_migration_recovery(server);
1652 case -NFS4ERR_LEASE_MOVED:
1653 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1655 case -NFS4ERR_DELEG_REVOKED:
1656 case -NFS4ERR_ADMIN_REVOKED:
1657 case -NFS4ERR_BAD_STATEID:
1658 case -NFS4ERR_OPENMODE:
1659 nfs_inode_find_state_and_recover(state->inode,
1661 nfs4_schedule_stateid_recovery(server, state);
1663 case -NFS4ERR_DELAY:
1664 case -NFS4ERR_GRACE:
1665 set_bit(NFS_DELEGATED_STATE, &state->flags);
1669 case -NFS4ERR_DENIED:
1670 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1676 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1678 struct nfs_server *server = NFS_SERVER(state->inode);
1679 struct nfs4_opendata *opendata;
1682 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1683 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1684 if (IS_ERR(opendata))
1685 return PTR_ERR(opendata);
1686 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1687 err = nfs4_open_recover(opendata, state);
1688 nfs4_opendata_put(opendata);
1689 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1692 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1694 struct nfs4_opendata *data = calldata;
1696 nfs40_setup_sequence(data->o_arg.server, &data->c_arg.seq_args,
1697 &data->c_res.seq_res, task);
1700 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1702 struct nfs4_opendata *data = calldata;
1704 nfs40_sequence_done(task, &data->c_res.seq_res);
1706 data->rpc_status = task->tk_status;
1707 if (data->rpc_status == 0) {
1708 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1709 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1710 renew_lease(data->o_res.server, data->timestamp);
1715 static void nfs4_open_confirm_release(void *calldata)
1717 struct nfs4_opendata *data = calldata;
1718 struct nfs4_state *state = NULL;
1720 /* If this request hasn't been cancelled, do nothing */
1721 if (data->cancelled == 0)
1723 /* In case of error, no cleanup! */
1724 if (!data->rpc_done)
1726 state = nfs4_opendata_to_nfs4_state(data);
1728 nfs4_close_state(state, data->o_arg.fmode);
1730 nfs4_opendata_put(data);
1733 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1734 .rpc_call_prepare = nfs4_open_confirm_prepare,
1735 .rpc_call_done = nfs4_open_confirm_done,
1736 .rpc_release = nfs4_open_confirm_release,
1740 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1742 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1744 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1745 struct rpc_task *task;
1746 struct rpc_message msg = {
1747 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1748 .rpc_argp = &data->c_arg,
1749 .rpc_resp = &data->c_res,
1750 .rpc_cred = data->owner->so_cred,
1752 struct rpc_task_setup task_setup_data = {
1753 .rpc_client = server->client,
1754 .rpc_message = &msg,
1755 .callback_ops = &nfs4_open_confirm_ops,
1756 .callback_data = data,
1757 .workqueue = nfsiod_workqueue,
1758 .flags = RPC_TASK_ASYNC,
1762 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
1763 kref_get(&data->kref);
1765 data->rpc_status = 0;
1766 data->timestamp = jiffies;
1767 task = rpc_run_task(&task_setup_data);
1769 return PTR_ERR(task);
1770 status = nfs4_wait_for_completion_rpc_task(task);
1772 data->cancelled = 1;
1775 status = data->rpc_status;
1780 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1782 struct nfs4_opendata *data = calldata;
1783 struct nfs4_state_owner *sp = data->owner;
1784 struct nfs_client *clp = sp->so_server->nfs_client;
1786 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1789 * Check if we still need to send an OPEN call, or if we can use
1790 * a delegation instead.
1792 if (data->state != NULL) {
1793 struct nfs_delegation *delegation;
1795 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1798 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1799 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1800 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
1801 can_open_delegated(delegation, data->o_arg.fmode))
1802 goto unlock_no_action;
1805 /* Update client id. */
1806 data->o_arg.clientid = clp->cl_clientid;
1807 switch (data->o_arg.claim) {
1808 case NFS4_OPEN_CLAIM_PREVIOUS:
1809 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1810 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1811 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
1812 case NFS4_OPEN_CLAIM_FH:
1813 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1814 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1816 data->timestamp = jiffies;
1817 if (nfs4_setup_sequence(data->o_arg.server,
1818 &data->o_arg.seq_args,
1819 &data->o_res.seq_res,
1821 nfs_release_seqid(data->o_arg.seqid);
1823 /* Set the create mode (note dependency on the session type) */
1824 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1825 if (data->o_arg.open_flags & O_EXCL) {
1826 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1827 if (nfs4_has_persistent_session(clp))
1828 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1829 else if (clp->cl_mvops->minor_version > 0)
1830 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1836 task->tk_action = NULL;
1838 nfs4_sequence_done(task, &data->o_res.seq_res);
1841 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1843 struct nfs4_opendata *data = calldata;
1845 data->rpc_status = task->tk_status;
1847 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1850 if (task->tk_status == 0) {
1851 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1852 switch (data->o_res.f_attr->mode & S_IFMT) {
1856 data->rpc_status = -ELOOP;
1859 data->rpc_status = -EISDIR;
1862 data->rpc_status = -ENOTDIR;
1865 renew_lease(data->o_res.server, data->timestamp);
1866 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1867 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1872 static void nfs4_open_release(void *calldata)
1874 struct nfs4_opendata *data = calldata;
1875 struct nfs4_state *state = NULL;
1877 /* If this request hasn't been cancelled, do nothing */
1878 if (data->cancelled == 0)
1880 /* In case of error, no cleanup! */
1881 if (data->rpc_status != 0 || !data->rpc_done)
1883 /* In case we need an open_confirm, no cleanup! */
1884 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1886 state = nfs4_opendata_to_nfs4_state(data);
1888 nfs4_close_state(state, data->o_arg.fmode);
1890 nfs4_opendata_put(data);
1893 static const struct rpc_call_ops nfs4_open_ops = {
1894 .rpc_call_prepare = nfs4_open_prepare,
1895 .rpc_call_done = nfs4_open_done,
1896 .rpc_release = nfs4_open_release,
1899 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1901 struct inode *dir = data->dir->d_inode;
1902 struct nfs_server *server = NFS_SERVER(dir);
1903 struct nfs_openargs *o_arg = &data->o_arg;
1904 struct nfs_openres *o_res = &data->o_res;
1905 struct rpc_task *task;
1906 struct rpc_message msg = {
1907 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1910 .rpc_cred = data->owner->so_cred,
1912 struct rpc_task_setup task_setup_data = {
1913 .rpc_client = server->client,
1914 .rpc_message = &msg,
1915 .callback_ops = &nfs4_open_ops,
1916 .callback_data = data,
1917 .workqueue = nfsiod_workqueue,
1918 .flags = RPC_TASK_ASYNC,
1922 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1923 kref_get(&data->kref);
1925 data->rpc_status = 0;
1926 data->cancelled = 0;
1927 data->is_recover = 0;
1929 nfs4_set_sequence_privileged(&o_arg->seq_args);
1930 data->is_recover = 1;
1932 task = rpc_run_task(&task_setup_data);
1934 return PTR_ERR(task);
1935 status = nfs4_wait_for_completion_rpc_task(task);
1937 data->cancelled = 1;
1940 status = data->rpc_status;
1946 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1948 struct inode *dir = data->dir->d_inode;
1949 struct nfs_openres *o_res = &data->o_res;
1952 status = nfs4_run_open_task(data, 1);
1953 if (status != 0 || !data->rpc_done)
1956 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1958 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1959 status = _nfs4_proc_open_confirm(data);
1968 * Additional permission checks in order to distinguish between an
1969 * open for read, and an open for execute. This works around the
1970 * fact that NFSv4 OPEN treats read and execute permissions as being
1972 * Note that in the non-execute case, we want to turn off permission
1973 * checking if we just created a new file (POSIX open() semantics).
1975 static int nfs4_opendata_access(struct rpc_cred *cred,
1976 struct nfs4_opendata *opendata,
1977 struct nfs4_state *state, fmode_t fmode,
1980 struct nfs_access_entry cache;
1983 /* access call failed or for some reason the server doesn't
1984 * support any access modes -- defer access call until later */
1985 if (opendata->o_res.access_supported == 0)
1990 * Use openflags to check for exec, because fmode won't
1991 * always have FMODE_EXEC set when file open for exec.
1993 if (openflags & __FMODE_EXEC) {
1994 /* ONLY check for exec rights */
1996 } else if ((fmode & FMODE_READ) && !opendata->file_created)
2000 cache.jiffies = jiffies;
2001 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2002 nfs_access_add_cache(state->inode, &cache);
2004 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
2007 /* even though OPEN succeeded, access is denied. Close the file */
2008 nfs4_close_state(state, fmode);
2013 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2015 static int _nfs4_proc_open(struct nfs4_opendata *data)
2017 struct inode *dir = data->dir->d_inode;
2018 struct nfs_server *server = NFS_SERVER(dir);
2019 struct nfs_openargs *o_arg = &data->o_arg;
2020 struct nfs_openres *o_res = &data->o_res;
2023 status = nfs4_run_open_task(data, 0);
2024 if (!data->rpc_done)
2027 if (status == -NFS4ERR_BADNAME &&
2028 !(o_arg->open_flags & O_CREAT))
2033 nfs_fattr_map_and_free_names(server, &data->f_attr);
2035 if (o_arg->open_flags & O_CREAT) {
2036 update_changeattr(dir, &o_res->cinfo);
2037 if (o_arg->open_flags & O_EXCL)
2038 data->file_created = 1;
2039 else if (o_res->cinfo.before != o_res->cinfo.after)
2040 data->file_created = 1;
2042 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2043 server->caps &= ~NFS_CAP_POSIX_LOCK;
2044 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2045 status = _nfs4_proc_open_confirm(data);
2049 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
2050 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
2054 static int nfs4_recover_expired_lease(struct nfs_server *server)
2056 return nfs4_client_recover_expired_lease(server->nfs_client);
2061 * reclaim state on the server after a network partition.
2062 * Assumes caller holds the appropriate lock
2064 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2066 struct nfs4_opendata *opendata;
2069 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2070 NFS4_OPEN_CLAIM_FH);
2071 if (IS_ERR(opendata))
2072 return PTR_ERR(opendata);
2073 ret = nfs4_open_recover(opendata, state);
2075 d_drop(ctx->dentry);
2076 nfs4_opendata_put(opendata);
2080 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2082 struct nfs_server *server = NFS_SERVER(state->inode);
2083 struct nfs4_exception exception = { };
2087 err = _nfs4_open_expired(ctx, state);
2088 trace_nfs4_open_expired(ctx, 0, err);
2089 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2094 case -NFS4ERR_GRACE:
2095 case -NFS4ERR_DELAY:
2096 nfs4_handle_exception(server, err, &exception);
2099 } while (exception.retry);
2104 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2106 struct nfs_open_context *ctx;
2109 ctx = nfs4_state_find_open_context(state);
2112 ret = nfs4_do_open_expired(ctx, state);
2113 put_nfs_open_context(ctx);
2117 static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2119 nfs_remove_bad_delegation(state->inode);
2120 write_seqlock(&state->seqlock);
2121 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2122 write_sequnlock(&state->seqlock);
2123 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2126 static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2128 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2129 nfs_finish_clear_delegation_stateid(state);
2132 static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2134 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2135 nfs40_clear_delegation_stateid(state);
2136 return nfs4_open_expired(sp, state);
2139 #if defined(CONFIG_NFS_V4_1)
2140 static void nfs41_check_delegation_stateid(struct nfs4_state *state)
2142 struct nfs_server *server = NFS_SERVER(state->inode);
2143 nfs4_stateid stateid;
2144 struct nfs_delegation *delegation;
2145 struct rpc_cred *cred;
2148 /* Get the delegation credential for use by test/free_stateid */
2150 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2151 if (delegation == NULL) {
2156 nfs4_stateid_copy(&stateid, &delegation->stateid);
2157 cred = get_rpccred(delegation->cred);
2159 status = nfs41_test_stateid(server, &stateid, cred);
2160 trace_nfs4_test_delegation_stateid(state, NULL, status);
2162 if (status != NFS_OK) {
2163 /* Free the stateid unless the server explicitly
2164 * informs us the stateid is unrecognized. */
2165 if (status != -NFS4ERR_BAD_STATEID)
2166 nfs41_free_stateid(server, &stateid, cred);
2167 nfs_finish_clear_delegation_stateid(state);
2174 * nfs41_check_open_stateid - possibly free an open stateid
2176 * @state: NFSv4 state for an inode
2178 * Returns NFS_OK if recovery for this stateid is now finished.
2179 * Otherwise a negative NFS4ERR value is returned.
2181 static int nfs41_check_open_stateid(struct nfs4_state *state)
2183 struct nfs_server *server = NFS_SERVER(state->inode);
2184 nfs4_stateid *stateid = &state->open_stateid;
2185 struct rpc_cred *cred = state->owner->so_cred;
2188 /* If a state reset has been done, test_stateid is unneeded */
2189 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2190 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2191 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2192 return -NFS4ERR_BAD_STATEID;
2194 status = nfs41_test_stateid(server, stateid, cred);
2195 trace_nfs4_test_open_stateid(state, NULL, status);
2196 if (status != NFS_OK) {
2197 /* Free the stateid unless the server explicitly
2198 * informs us the stateid is unrecognized. */
2199 if (status != -NFS4ERR_BAD_STATEID)
2200 nfs41_free_stateid(server, stateid, cred);
2202 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2203 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2204 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2205 clear_bit(NFS_OPEN_STATE, &state->flags);
2210 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2214 nfs41_check_delegation_stateid(state);
2215 status = nfs41_check_open_stateid(state);
2216 if (status != NFS_OK)
2217 status = nfs4_open_expired(sp, state);
2223 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2224 * fields corresponding to attributes that were used to store the verifier.
2225 * Make sure we clobber those fields in the later setattr call
2227 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2229 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2230 !(sattr->ia_valid & ATTR_ATIME_SET))
2231 sattr->ia_valid |= ATTR_ATIME;
2233 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2234 !(sattr->ia_valid & ATTR_MTIME_SET))
2235 sattr->ia_valid |= ATTR_MTIME;
2238 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2241 struct nfs_open_context *ctx)
2243 struct nfs4_state_owner *sp = opendata->owner;
2244 struct nfs_server *server = sp->so_server;
2245 struct dentry *dentry;
2246 struct nfs4_state *state;
2250 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2252 ret = _nfs4_proc_open(opendata);
2256 state = nfs4_opendata_to_nfs4_state(opendata);
2257 ret = PTR_ERR(state);
2260 if (server->caps & NFS_CAP_POSIX_LOCK)
2261 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2263 dentry = opendata->dentry;
2264 if (dentry->d_inode == NULL) {
2265 /* FIXME: Is this d_drop() ever needed? */
2267 dentry = d_add_unique(dentry, igrab(state->inode));
2268 if (dentry == NULL) {
2269 dentry = opendata->dentry;
2270 } else if (dentry != ctx->dentry) {
2272 ctx->dentry = dget(dentry);
2274 nfs_set_verifier(dentry,
2275 nfs_save_change_attribute(opendata->dir->d_inode));
2278 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2283 if (dentry->d_inode == state->inode) {
2284 nfs_inode_attach_open_context(ctx);
2285 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2286 nfs4_schedule_stateid_recovery(server, state);
2293 * Returns a referenced nfs4_state
2295 static int _nfs4_do_open(struct inode *dir,
2296 struct nfs_open_context *ctx,
2298 struct iattr *sattr,
2299 struct nfs4_label *label,
2302 struct nfs4_state_owner *sp;
2303 struct nfs4_state *state = NULL;
2304 struct nfs_server *server = NFS_SERVER(dir);
2305 struct nfs4_opendata *opendata;
2306 struct dentry *dentry = ctx->dentry;
2307 struct rpc_cred *cred = ctx->cred;
2308 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2309 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
2310 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
2311 struct nfs4_label *olabel = NULL;
2314 /* Protect against reboot recovery conflicts */
2316 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2318 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2321 status = nfs4_recover_expired_lease(server);
2323 goto err_put_state_owner;
2324 if (dentry->d_inode != NULL)
2325 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
2327 if (dentry->d_inode)
2328 claim = NFS4_OPEN_CLAIM_FH;
2329 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
2330 label, claim, GFP_KERNEL);
2331 if (opendata == NULL)
2332 goto err_put_state_owner;
2335 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2336 if (IS_ERR(olabel)) {
2337 status = PTR_ERR(olabel);
2338 goto err_opendata_put;
2342 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2343 if (!opendata->f_attr.mdsthreshold) {
2344 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2345 if (!opendata->f_attr.mdsthreshold)
2346 goto err_free_label;
2348 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
2350 if (dentry->d_inode != NULL)
2351 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
2353 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
2355 goto err_free_label;
2358 if ((opendata->o_arg.open_flags & O_EXCL) &&
2359 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
2360 nfs4_exclusive_attrset(opendata, sattr);
2362 nfs_fattr_init(opendata->o_res.f_attr);
2363 status = nfs4_do_setattr(state->inode, cred,
2364 opendata->o_res.f_attr, sattr,
2365 state, label, olabel);
2367 nfs_setattr_update_inode(state->inode, sattr);
2368 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2369 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2372 if (opendata->file_created)
2373 *opened |= FILE_CREATED;
2375 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
2376 *ctx_th = opendata->f_attr.mdsthreshold;
2377 opendata->f_attr.mdsthreshold = NULL;
2380 nfs4_label_free(olabel);
2382 nfs4_opendata_put(opendata);
2383 nfs4_put_state_owner(sp);
2386 nfs4_label_free(olabel);
2388 nfs4_opendata_put(opendata);
2389 err_put_state_owner:
2390 nfs4_put_state_owner(sp);
2396 static struct nfs4_state *nfs4_do_open(struct inode *dir,
2397 struct nfs_open_context *ctx,
2399 struct iattr *sattr,
2400 struct nfs4_label *label,
2403 struct nfs_server *server = NFS_SERVER(dir);
2404 struct nfs4_exception exception = { };
2405 struct nfs4_state *res;
2409 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
2411 trace_nfs4_open_file(ctx, flags, status);
2414 /* NOTE: BAD_SEQID means the server and client disagree about the
2415 * book-keeping w.r.t. state-changing operations
2416 * (OPEN/CLOSE/LOCK/LOCKU...)
2417 * It is actually a sign of a bug on the client or on the server.
2419 * If we receive a BAD_SEQID error in the particular case of
2420 * doing an OPEN, we assume that nfs_increment_open_seqid() will
2421 * have unhashed the old state_owner for us, and that we can
2422 * therefore safely retry using a new one. We should still warn
2423 * the user though...
2425 if (status == -NFS4ERR_BAD_SEQID) {
2426 pr_warn_ratelimited("NFS: v4 server %s "
2427 " returned a bad sequence-id error!\n",
2428 NFS_SERVER(dir)->nfs_client->cl_hostname);
2429 exception.retry = 1;
2433 * BAD_STATEID on OPEN means that the server cancelled our
2434 * state before it received the OPEN_CONFIRM.
2435 * Recover by retrying the request as per the discussion
2436 * on Page 181 of RFC3530.
2438 if (status == -NFS4ERR_BAD_STATEID) {
2439 exception.retry = 1;
2442 if (status == -EAGAIN) {
2443 /* We must have found a delegation */
2444 exception.retry = 1;
2447 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2449 res = ERR_PTR(nfs4_handle_exception(server,
2450 status, &exception));
2451 } while (exception.retry);
2455 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2456 struct nfs_fattr *fattr, struct iattr *sattr,
2457 struct nfs4_state *state, struct nfs4_label *ilabel,
2458 struct nfs4_label *olabel)
2460 struct nfs_server *server = NFS_SERVER(inode);
2461 struct nfs_setattrargs arg = {
2462 .fh = NFS_FH(inode),
2465 .bitmask = server->attr_bitmask,
2468 struct nfs_setattrres res = {
2473 struct rpc_message msg = {
2474 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2479 unsigned long timestamp = jiffies;
2484 arg.bitmask = nfs4_bitmask(server, ilabel);
2486 arg.bitmask = nfs4_bitmask(server, olabel);
2488 nfs_fattr_init(fattr);
2490 /* Servers should only apply open mode checks for file size changes */
2491 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2492 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2494 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2495 /* Use that stateid */
2496 } else if (truncate && state != NULL) {
2497 struct nfs_lockowner lockowner = {
2498 .l_owner = current->files,
2499 .l_pid = current->tgid,
2501 if (!nfs4_valid_open_stateid(state))
2503 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2504 &lockowner) == -EIO)
2507 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
2509 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2510 if (status == 0 && state != NULL)
2511 renew_lease(server, timestamp);
2515 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2516 struct nfs_fattr *fattr, struct iattr *sattr,
2517 struct nfs4_state *state, struct nfs4_label *ilabel,
2518 struct nfs4_label *olabel)
2520 struct nfs_server *server = NFS_SERVER(inode);
2521 struct nfs4_exception exception = {
2527 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
2528 trace_nfs4_setattr(inode, err);
2530 case -NFS4ERR_OPENMODE:
2531 if (!(sattr->ia_valid & ATTR_SIZE)) {
2532 pr_warn_once("NFSv4: server %s is incorrectly "
2533 "applying open mode checks to "
2534 "a SETATTR that is not "
2535 "changing file size.\n",
2536 server->nfs_client->cl_hostname);
2538 if (state && !(state->state & FMODE_WRITE)) {
2540 if (sattr->ia_valid & ATTR_OPEN)
2545 err = nfs4_handle_exception(server, err, &exception);
2546 } while (exception.retry);
2551 struct nfs4_closedata {
2552 struct inode *inode;
2553 struct nfs4_state *state;
2554 struct nfs_closeargs arg;
2555 struct nfs_closeres res;
2556 struct nfs_fattr fattr;
2557 unsigned long timestamp;
2562 static void nfs4_free_closedata(void *data)
2564 struct nfs4_closedata *calldata = data;
2565 struct nfs4_state_owner *sp = calldata->state->owner;
2566 struct super_block *sb = calldata->state->inode->i_sb;
2569 pnfs_roc_release(calldata->state->inode);
2570 nfs4_put_open_state(calldata->state);
2571 nfs_free_seqid(calldata->arg.seqid);
2572 nfs4_put_state_owner(sp);
2573 nfs_sb_deactive(sb);
2577 static void nfs4_close_done(struct rpc_task *task, void *data)
2579 struct nfs4_closedata *calldata = data;
2580 struct nfs4_state *state = calldata->state;
2581 struct nfs_server *server = NFS_SERVER(calldata->inode);
2582 nfs4_stateid *res_stateid = NULL;
2584 dprintk("%s: begin!\n", __func__);
2585 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2587 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
2588 /* hmm. we are done with the inode, and in the process of freeing
2589 * the state_owner. we keep this around to process errors
2591 switch (task->tk_status) {
2593 res_stateid = &calldata->res.stateid;
2594 if (calldata->arg.fmode == 0 && calldata->roc)
2595 pnfs_roc_set_barrier(state->inode,
2596 calldata->roc_barrier);
2597 renew_lease(server, calldata->timestamp);
2599 case -NFS4ERR_ADMIN_REVOKED:
2600 case -NFS4ERR_STALE_STATEID:
2601 case -NFS4ERR_OLD_STATEID:
2602 case -NFS4ERR_BAD_STATEID:
2603 case -NFS4ERR_EXPIRED:
2604 if (!nfs4_stateid_match(&calldata->arg.stateid,
2606 rpc_restart_call_prepare(task);
2609 if (calldata->arg.fmode == 0)
2612 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
2613 rpc_restart_call_prepare(task);
2617 nfs_clear_open_stateid(state, res_stateid, calldata->arg.fmode);
2619 nfs_release_seqid(calldata->arg.seqid);
2620 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2621 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2624 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2626 struct nfs4_closedata *calldata = data;
2627 struct nfs4_state *state = calldata->state;
2628 struct inode *inode = calldata->inode;
2629 bool is_rdonly, is_wronly, is_rdwr;
2632 dprintk("%s: begin!\n", __func__);
2633 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2636 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2637 spin_lock(&state->owner->so_lock);
2638 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2639 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2640 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
2641 nfs4_stateid_copy(&calldata->arg.stateid, &state->stateid);
2642 /* Calculate the change in open mode */
2643 calldata->arg.fmode = 0;
2644 if (state->n_rdwr == 0) {
2645 if (state->n_rdonly == 0)
2646 call_close |= is_rdonly;
2648 calldata->arg.fmode |= FMODE_READ;
2649 if (state->n_wronly == 0)
2650 call_close |= is_wronly;
2652 calldata->arg.fmode |= FMODE_WRITE;
2654 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2656 if (calldata->arg.fmode == 0)
2657 call_close |= is_rdwr;
2659 if (!nfs4_valid_open_stateid(state))
2661 spin_unlock(&state->owner->so_lock);
2664 /* Note: exit _without_ calling nfs4_close_done */
2668 if (calldata->arg.fmode == 0) {
2669 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2670 if (calldata->roc &&
2671 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2672 nfs_release_seqid(calldata->arg.seqid);
2677 nfs_fattr_init(calldata->res.fattr);
2678 calldata->timestamp = jiffies;
2679 if (nfs4_setup_sequence(NFS_SERVER(inode),
2680 &calldata->arg.seq_args,
2681 &calldata->res.seq_res,
2683 nfs_release_seqid(calldata->arg.seqid);
2684 dprintk("%s: done!\n", __func__);
2687 task->tk_action = NULL;
2689 nfs4_sequence_done(task, &calldata->res.seq_res);
2692 static const struct rpc_call_ops nfs4_close_ops = {
2693 .rpc_call_prepare = nfs4_close_prepare,
2694 .rpc_call_done = nfs4_close_done,
2695 .rpc_release = nfs4_free_closedata,
2698 static bool nfs4_state_has_opener(struct nfs4_state *state)
2700 /* first check existing openers */
2701 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 &&
2702 state->n_rdonly != 0)
2705 if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 &&
2706 state->n_wronly != 0)
2709 if (test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 &&
2716 static bool nfs4_roc(struct inode *inode)
2718 struct nfs_inode *nfsi = NFS_I(inode);
2719 struct nfs_open_context *ctx;
2720 struct nfs4_state *state;
2722 spin_lock(&inode->i_lock);
2723 list_for_each_entry(ctx, &nfsi->open_files, list) {
2727 if (nfs4_state_has_opener(state)) {
2728 spin_unlock(&inode->i_lock);
2732 spin_unlock(&inode->i_lock);
2734 if (nfs4_check_delegation(inode, FMODE_READ))
2737 return pnfs_roc(inode);
2741 * It is possible for data to be read/written from a mem-mapped file
2742 * after the sys_close call (which hits the vfs layer as a flush).
2743 * This means that we can't safely call nfsv4 close on a file until
2744 * the inode is cleared. This in turn means that we are not good
2745 * NFSv4 citizens - we do not indicate to the server to update the file's
2746 * share state even when we are done with one of the three share
2747 * stateid's in the inode.
2749 * NOTE: Caller must be holding the sp->so_owner semaphore!
2751 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
2753 struct nfs_server *server = NFS_SERVER(state->inode);
2754 struct nfs4_closedata *calldata;
2755 struct nfs4_state_owner *sp = state->owner;
2756 struct rpc_task *task;
2757 struct rpc_message msg = {
2758 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2759 .rpc_cred = state->owner->so_cred,
2761 struct rpc_task_setup task_setup_data = {
2762 .rpc_client = server->client,
2763 .rpc_message = &msg,
2764 .callback_ops = &nfs4_close_ops,
2765 .workqueue = nfsiod_workqueue,
2766 .flags = RPC_TASK_ASYNC,
2768 int status = -ENOMEM;
2770 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2771 &task_setup_data.rpc_client, &msg);
2773 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2774 if (calldata == NULL)
2776 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2777 calldata->inode = state->inode;
2778 calldata->state = state;
2779 calldata->arg.fh = NFS_FH(state->inode);
2780 /* Serialization for the sequence id */
2781 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2782 if (IS_ERR(calldata->arg.seqid))
2783 goto out_free_calldata;
2784 calldata->arg.fmode = 0;
2785 calldata->arg.bitmask = server->cache_consistency_bitmask;
2786 calldata->res.fattr = &calldata->fattr;
2787 calldata->res.seqid = calldata->arg.seqid;
2788 calldata->res.server = server;
2789 calldata->roc = nfs4_roc(state->inode);
2790 nfs_sb_active(calldata->inode->i_sb);
2792 msg.rpc_argp = &calldata->arg;
2793 msg.rpc_resp = &calldata->res;
2794 task_setup_data.callback_data = calldata;
2795 task = rpc_run_task(&task_setup_data);
2797 return PTR_ERR(task);
2800 status = rpc_wait_for_completion_task(task);
2806 nfs4_put_open_state(state);
2807 nfs4_put_state_owner(sp);
2811 static struct inode *
2812 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2813 int open_flags, struct iattr *attr, int *opened)
2815 struct nfs4_state *state;
2816 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2818 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
2820 /* Protect against concurrent sillydeletes */
2821 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
2823 nfs4_label_release_security(label);
2826 return ERR_CAST(state);
2827 return state->inode;
2830 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2832 if (ctx->state == NULL)
2835 nfs4_close_sync(ctx->state, ctx->mode);
2837 nfs4_close_state(ctx->state, ctx->mode);
2840 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2841 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
2842 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
2844 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2846 struct nfs4_server_caps_arg args = {
2849 struct nfs4_server_caps_res res = {};
2850 struct rpc_message msg = {
2851 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2857 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2859 /* Sanity check the server answers */
2860 switch (server->nfs_client->cl_minorversion) {
2862 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2863 res.attr_bitmask[2] = 0;
2866 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2869 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2871 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2872 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2873 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2874 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2875 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2876 NFS_CAP_CTIME|NFS_CAP_MTIME|
2877 NFS_CAP_SECURITY_LABEL);
2878 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2879 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2880 server->caps |= NFS_CAP_ACLS;
2881 if (res.has_links != 0)
2882 server->caps |= NFS_CAP_HARDLINKS;
2883 if (res.has_symlinks != 0)
2884 server->caps |= NFS_CAP_SYMLINKS;
2885 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2886 server->caps |= NFS_CAP_FILEID;
2887 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2888 server->caps |= NFS_CAP_MODE;
2889 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2890 server->caps |= NFS_CAP_NLINK;
2891 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2892 server->caps |= NFS_CAP_OWNER;
2893 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2894 server->caps |= NFS_CAP_OWNER_GROUP;
2895 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2896 server->caps |= NFS_CAP_ATIME;
2897 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2898 server->caps |= NFS_CAP_CTIME;
2899 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2900 server->caps |= NFS_CAP_MTIME;
2901 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
2902 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2903 server->caps |= NFS_CAP_SECURITY_LABEL;
2905 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2906 sizeof(server->attr_bitmask));
2907 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2909 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2910 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2911 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2912 server->cache_consistency_bitmask[2] = 0;
2913 server->acl_bitmask = res.acl_bitmask;
2914 server->fh_expire_type = res.fh_expire_type;
2920 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2922 struct nfs4_exception exception = { };
2925 err = nfs4_handle_exception(server,
2926 _nfs4_server_capabilities(server, fhandle),
2928 } while (exception.retry);
2932 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2933 struct nfs_fsinfo *info)
2936 struct nfs4_lookup_root_arg args = {
2939 struct nfs4_lookup_res res = {
2941 .fattr = info->fattr,
2944 struct rpc_message msg = {
2945 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2950 bitmask[0] = nfs4_fattr_bitmap[0];
2951 bitmask[1] = nfs4_fattr_bitmap[1];
2953 * Process the label in the upcoming getfattr
2955 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2957 nfs_fattr_init(info->fattr);
2958 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2961 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2962 struct nfs_fsinfo *info)
2964 struct nfs4_exception exception = { };
2967 err = _nfs4_lookup_root(server, fhandle, info);
2968 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
2971 case -NFS4ERR_WRONGSEC:
2974 err = nfs4_handle_exception(server, err, &exception);
2976 } while (exception.retry);
2981 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2982 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2984 struct rpc_auth_create_args auth_args = {
2985 .pseudoflavor = flavor,
2987 struct rpc_auth *auth;
2990 auth = rpcauth_create(&auth_args, server->client);
2995 ret = nfs4_lookup_root(server, fhandle, info);
3001 * Retry pseudoroot lookup with various security flavors. We do this when:
3003 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3004 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3006 * Returns zero on success, or a negative NFS4ERR value, or a
3007 * negative errno value.
3009 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3010 struct nfs_fsinfo *info)
3012 /* Per 3530bis 15.33.5 */
3013 static const rpc_authflavor_t flav_array[] = {
3017 RPC_AUTH_UNIX, /* courtesy */
3020 int status = -EPERM;
3023 if (server->auth_info.flavor_len > 0) {
3024 /* try each flavor specified by user */
3025 for (i = 0; i < server->auth_info.flavor_len; i++) {
3026 status = nfs4_lookup_root_sec(server, fhandle, info,
3027 server->auth_info.flavors[i]);
3028 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3033 /* no flavors specified by user, try default list */
3034 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3035 status = nfs4_lookup_root_sec(server, fhandle, info,
3037 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3044 * -EACCESS could mean that the user doesn't have correct permissions
3045 * to access the mount. It could also mean that we tried to mount
3046 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3047 * existing mount programs don't handle -EACCES very well so it should
3048 * be mapped to -EPERM instead.
3050 if (status == -EACCES)
3055 static int nfs4_do_find_root_sec(struct nfs_server *server,
3056 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3058 int mv = server->nfs_client->cl_minorversion;
3059 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3063 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3064 * @server: initialized nfs_server handle
3065 * @fhandle: we fill in the pseudo-fs root file handle
3066 * @info: we fill in an FSINFO struct
3067 * @auth_probe: probe the auth flavours
3069 * Returns zero on success, or a negative errno.
3071 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
3072 struct nfs_fsinfo *info,
3077 switch (auth_probe) {
3079 status = nfs4_lookup_root(server, fhandle, info);
3080 if (status != -NFS4ERR_WRONGSEC)
3083 status = nfs4_do_find_root_sec(server, fhandle, info);
3087 status = nfs4_server_capabilities(server, fhandle);
3089 status = nfs4_do_fsinfo(server, fhandle, info);
3091 return nfs4_map_errors(status);
3094 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3095 struct nfs_fsinfo *info)
3098 struct nfs_fattr *fattr = info->fattr;
3099 struct nfs4_label *label = NULL;
3101 error = nfs4_server_capabilities(server, mntfh);
3103 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3107 label = nfs4_label_alloc(server, GFP_KERNEL);
3109 return PTR_ERR(label);
3111 error = nfs4_proc_getattr(server, mntfh, fattr, label);
3113 dprintk("nfs4_get_root: getattr error = %d\n", -error);
3114 goto err_free_label;
3117 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3118 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3119 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3122 nfs4_label_free(label);
3128 * Get locations and (maybe) other attributes of a referral.
3129 * Note that we'll actually follow the referral later when
3130 * we detect fsid mismatch in inode revalidation
3132 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3133 const struct qstr *name, struct nfs_fattr *fattr,
3134 struct nfs_fh *fhandle)
3136 int status = -ENOMEM;
3137 struct page *page = NULL;
3138 struct nfs4_fs_locations *locations = NULL;
3140 page = alloc_page(GFP_KERNEL);
3143 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3144 if (locations == NULL)
3147 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
3152 * If the fsid didn't change, this is a migration event, not a
3153 * referral. Cause us to drop into the exception handler, which
3154 * will kick off migration recovery.
3156 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3157 dprintk("%s: server did not return a different fsid for"
3158 " a referral at %s\n", __func__, name->name);
3159 status = -NFS4ERR_MOVED;
3162 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3163 nfs_fixup_referral_attributes(&locations->fattr);
3165 /* replace the lookup nfs_fattr with the locations nfs_fattr */
3166 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
3167 memset(fhandle, 0, sizeof(struct nfs_fh));
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_getattr_arg args = {
3180 .bitmask = server->attr_bitmask,
3182 struct nfs4_getattr_res res = {
3187 struct rpc_message msg = {
3188 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3193 args.bitmask = nfs4_bitmask(server, label);
3195 nfs_fattr_init(fattr);
3196 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3199 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3200 struct nfs_fattr *fattr, struct nfs4_label *label)
3202 struct nfs4_exception exception = { };
3205 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3206 trace_nfs4_getattr(server, fhandle, fattr, err);
3207 err = nfs4_handle_exception(server, err,
3209 } while (exception.retry);
3214 * The file is not closed if it is opened due to the a request to change
3215 * the size of the file. The open call will not be needed once the
3216 * VFS layer lookup-intents are implemented.
3218 * Close is called when the inode is destroyed.
3219 * If we haven't opened the file for O_WRONLY, we
3220 * need to in the size_change case to obtain a stateid.
3223 * Because OPEN is always done by name in nfsv4, it is
3224 * possible that we opened a different file by the same
3225 * name. We can recognize this race condition, but we
3226 * can't do anything about it besides returning an error.
3228 * This will be fixed with VFS changes (lookup-intent).
3231 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3232 struct iattr *sattr)
3234 struct inode *inode = dentry->d_inode;
3235 struct rpc_cred *cred = NULL;
3236 struct nfs4_state *state = NULL;
3237 struct nfs4_label *label = NULL;
3240 if (pnfs_ld_layoutret_on_setattr(inode) &&
3241 sattr->ia_valid & ATTR_SIZE &&
3242 sattr->ia_size < i_size_read(inode))
3243 pnfs_commit_and_return_layout(inode);
3245 nfs_fattr_init(fattr);
3247 /* Deal with open(O_TRUNC) */
3248 if (sattr->ia_valid & ATTR_OPEN)
3249 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
3251 /* Optimization: if the end result is no change, don't RPC */
3252 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
3255 /* Search for an existing open(O_WRITE) file */
3256 if (sattr->ia_valid & ATTR_FILE) {
3257 struct nfs_open_context *ctx;
3259 ctx = nfs_file_open_context(sattr->ia_file);
3266 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3268 return PTR_ERR(label);
3270 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
3272 nfs_setattr_update_inode(inode, sattr);
3273 nfs_setsecurity(inode, fattr, label);
3275 nfs4_label_free(label);
3279 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3280 const struct qstr *name, struct nfs_fh *fhandle,
3281 struct nfs_fattr *fattr, struct nfs4_label *label)
3283 struct nfs_server *server = NFS_SERVER(dir);
3285 struct nfs4_lookup_arg args = {
3286 .bitmask = server->attr_bitmask,
3287 .dir_fh = NFS_FH(dir),
3290 struct nfs4_lookup_res res = {
3296 struct rpc_message msg = {
3297 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3302 args.bitmask = nfs4_bitmask(server, label);
3304 nfs_fattr_init(fattr);
3306 dprintk("NFS call lookup %s\n", name->name);
3307 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
3308 dprintk("NFS reply lookup: %d\n", status);
3312 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
3314 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
3315 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
3316 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3320 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3321 struct qstr *name, struct nfs_fh *fhandle,
3322 struct nfs_fattr *fattr, struct nfs4_label *label)
3324 struct nfs4_exception exception = { };
3325 struct rpc_clnt *client = *clnt;
3328 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
3329 trace_nfs4_lookup(dir, name, err);
3331 case -NFS4ERR_BADNAME:
3334 case -NFS4ERR_MOVED:
3335 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
3337 case -NFS4ERR_WRONGSEC:
3339 if (client != *clnt)
3341 client = nfs4_negotiate_security(client, dir, name);
3343 return PTR_ERR(client);
3345 exception.retry = 1;
3348 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3350 } while (exception.retry);
3355 else if (client != *clnt)
3356 rpc_shutdown_client(client);
3361 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
3362 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3363 struct nfs4_label *label)
3366 struct rpc_clnt *client = NFS_CLIENT(dir);
3368 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
3369 if (client != NFS_CLIENT(dir)) {
3370 rpc_shutdown_client(client);
3371 nfs_fixup_secinfo_attributes(fattr);
3377 nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3378 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3380 struct rpc_clnt *client = NFS_CLIENT(dir);
3383 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
3385 return ERR_PTR(status);
3386 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
3389 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3391 struct nfs_server *server = NFS_SERVER(inode);
3392 struct nfs4_accessargs args = {
3393 .fh = NFS_FH(inode),
3394 .bitmask = server->cache_consistency_bitmask,
3396 struct nfs4_accessres res = {
3399 struct rpc_message msg = {
3400 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3403 .rpc_cred = entry->cred,
3405 int mode = entry->mask;
3409 * Determine which access bits we want to ask for...
3411 if (mode & MAY_READ)
3412 args.access |= NFS4_ACCESS_READ;
3413 if (S_ISDIR(inode->i_mode)) {
3414 if (mode & MAY_WRITE)
3415 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3416 if (mode & MAY_EXEC)
3417 args.access |= NFS4_ACCESS_LOOKUP;
3419 if (mode & MAY_WRITE)
3420 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3421 if (mode & MAY_EXEC)
3422 args.access |= NFS4_ACCESS_EXECUTE;
3425 res.fattr = nfs_alloc_fattr();
3426 if (res.fattr == NULL)
3429 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3431 nfs_access_set_mask(entry, res.access);
3432 nfs_refresh_inode(inode, res.fattr);
3434 nfs_free_fattr(res.fattr);
3438 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3440 struct nfs4_exception exception = { };
3443 err = _nfs4_proc_access(inode, entry);
3444 trace_nfs4_access(inode, err);
3445 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3447 } while (exception.retry);
3452 * TODO: For the time being, we don't try to get any attributes
3453 * along with any of the zero-copy operations READ, READDIR,
3456 * In the case of the first three, we want to put the GETATTR
3457 * after the read-type operation -- this is because it is hard
3458 * to predict the length of a GETATTR response in v4, and thus
3459 * align the READ data correctly. This means that the GETATTR
3460 * may end up partially falling into the page cache, and we should
3461 * shift it into the 'tail' of the xdr_buf before processing.
3462 * To do this efficiently, we need to know the total length
3463 * of data received, which doesn't seem to be available outside
3466 * In the case of WRITE, we also want to put the GETATTR after
3467 * the operation -- in this case because we want to make sure
3468 * we get the post-operation mtime and size.
3470 * Both of these changes to the XDR layer would in fact be quite
3471 * minor, but I decided to leave them for a subsequent patch.
3473 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3474 unsigned int pgbase, unsigned int pglen)
3476 struct nfs4_readlink args = {
3477 .fh = NFS_FH(inode),
3482 struct nfs4_readlink_res res;
3483 struct rpc_message msg = {
3484 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3489 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
3492 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3493 unsigned int pgbase, unsigned int pglen)
3495 struct nfs4_exception exception = { };
3498 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3499 trace_nfs4_readlink(inode, err);
3500 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3502 } while (exception.retry);
3507 * This is just for mknod. open(O_CREAT) will always do ->open_context().
3510 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
3513 struct nfs4_label l, *ilabel = NULL;
3514 struct nfs_open_context *ctx;
3515 struct nfs4_state *state;
3519 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3521 return PTR_ERR(ctx);
3523 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3525 sattr->ia_mode &= ~current_umask();
3526 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
3527 if (IS_ERR(state)) {
3528 status = PTR_ERR(state);
3532 nfs4_label_release_security(ilabel);
3533 put_nfs_open_context(ctx);
3537 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3539 struct nfs_server *server = NFS_SERVER(dir);
3540 struct nfs_removeargs args = {
3544 struct nfs_removeres res = {
3547 struct rpc_message msg = {
3548 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3554 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
3556 update_changeattr(dir, &res.cinfo);
3560 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3562 struct nfs4_exception exception = { };
3565 err = _nfs4_proc_remove(dir, name);
3566 trace_nfs4_remove(dir, name, err);
3567 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3569 } while (exception.retry);
3573 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
3575 struct nfs_server *server = NFS_SERVER(dir);
3576 struct nfs_removeargs *args = msg->rpc_argp;
3577 struct nfs_removeres *res = msg->rpc_resp;
3579 res->server = server;
3580 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
3581 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
3583 nfs_fattr_init(res->dir_attr);
3586 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3588 nfs4_setup_sequence(NFS_SERVER(data->dir),
3589 &data->args.seq_args,
3594 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
3596 struct nfs_unlinkdata *data = task->tk_calldata;
3597 struct nfs_removeres *res = &data->res;
3599 if (!nfs4_sequence_done(task, &res->seq_res))
3601 if (nfs4_async_handle_error(task, res->server, NULL,
3602 &data->timeout) == -EAGAIN)
3604 update_changeattr(dir, &res->cinfo);
3608 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3610 struct nfs_server *server = NFS_SERVER(dir);
3611 struct nfs_renameargs *arg = msg->rpc_argp;
3612 struct nfs_renameres *res = msg->rpc_resp;
3614 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
3615 res->server = server;
3616 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
3619 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3621 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3622 &data->args.seq_args,
3627 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3628 struct inode *new_dir)
3630 struct nfs_renamedata *data = task->tk_calldata;
3631 struct nfs_renameres *res = &data->res;
3633 if (!nfs4_sequence_done(task, &res->seq_res))
3635 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
3638 update_changeattr(old_dir, &res->old_cinfo);
3639 update_changeattr(new_dir, &res->new_cinfo);
3643 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3645 struct nfs_server *server = NFS_SERVER(inode);
3646 struct nfs4_link_arg arg = {
3647 .fh = NFS_FH(inode),
3648 .dir_fh = NFS_FH(dir),
3650 .bitmask = server->attr_bitmask,
3652 struct nfs4_link_res res = {
3656 struct rpc_message msg = {
3657 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3661 int status = -ENOMEM;
3663 res.fattr = nfs_alloc_fattr();
3664 if (res.fattr == NULL)
3667 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3668 if (IS_ERR(res.label)) {
3669 status = PTR_ERR(res.label);
3672 arg.bitmask = nfs4_bitmask(server, res.label);
3674 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3676 update_changeattr(dir, &res.cinfo);
3677 status = nfs_post_op_update_inode(inode, res.fattr);
3679 nfs_setsecurity(inode, res.fattr, res.label);
3683 nfs4_label_free(res.label);
3686 nfs_free_fattr(res.fattr);
3690 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3692 struct nfs4_exception exception = { };
3695 err = nfs4_handle_exception(NFS_SERVER(inode),
3696 _nfs4_proc_link(inode, dir, name),
3698 } while (exception.retry);
3702 struct nfs4_createdata {
3703 struct rpc_message msg;
3704 struct nfs4_create_arg arg;
3705 struct nfs4_create_res res;
3707 struct nfs_fattr fattr;
3708 struct nfs4_label *label;
3711 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3712 struct qstr *name, struct iattr *sattr, u32 ftype)
3714 struct nfs4_createdata *data;
3716 data = kzalloc(sizeof(*data), GFP_KERNEL);
3718 struct nfs_server *server = NFS_SERVER(dir);
3720 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3721 if (IS_ERR(data->label))
3724 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3725 data->msg.rpc_argp = &data->arg;
3726 data->msg.rpc_resp = &data->res;
3727 data->arg.dir_fh = NFS_FH(dir);
3728 data->arg.server = server;
3729 data->arg.name = name;
3730 data->arg.attrs = sattr;
3731 data->arg.ftype = ftype;
3732 data->arg.bitmask = nfs4_bitmask(server, data->label);
3733 data->res.server = server;
3734 data->res.fh = &data->fh;
3735 data->res.fattr = &data->fattr;
3736 data->res.label = data->label;
3737 nfs_fattr_init(data->res.fattr);
3745 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3747 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3748 &data->arg.seq_args, &data->res.seq_res, 1);
3750 update_changeattr(dir, &data->res.dir_cinfo);
3751 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
3756 static void nfs4_free_createdata(struct nfs4_createdata *data)
3758 nfs4_label_free(data->label);
3762 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3763 struct page *page, unsigned int len, struct iattr *sattr,
3764 struct nfs4_label *label)
3766 struct nfs4_createdata *data;
3767 int status = -ENAMETOOLONG;
3769 if (len > NFS4_MAXPATHLEN)
3773 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3777 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3778 data->arg.u.symlink.pages = &page;
3779 data->arg.u.symlink.len = len;
3780 data->arg.label = label;
3782 status = nfs4_do_create(dir, dentry, data);
3784 nfs4_free_createdata(data);
3789 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3790 struct page *page, unsigned int len, struct iattr *sattr)
3792 struct nfs4_exception exception = { };
3793 struct nfs4_label l, *label = NULL;
3796 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3799 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3800 trace_nfs4_symlink(dir, &dentry->d_name, err);
3801 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3803 } while (exception.retry);
3805 nfs4_label_release_security(label);
3809 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3810 struct iattr *sattr, struct nfs4_label *label)
3812 struct nfs4_createdata *data;
3813 int status = -ENOMEM;
3815 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3819 data->arg.label = label;
3820 status = nfs4_do_create(dir, dentry, data);
3822 nfs4_free_createdata(data);
3827 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3828 struct iattr *sattr)
3830 struct nfs4_exception exception = { };
3831 struct nfs4_label l, *label = NULL;
3834 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3836 sattr->ia_mode &= ~current_umask();
3838 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3839 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3840 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3842 } while (exception.retry);
3843 nfs4_label_release_security(label);
3848 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3849 u64 cookie, struct page **pages, unsigned int count, int plus)
3851 struct inode *dir = dentry->d_inode;
3852 struct nfs4_readdir_arg args = {
3857 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3860 struct nfs4_readdir_res res;
3861 struct rpc_message msg = {
3862 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3869 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3871 (unsigned long long)cookie);
3872 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
3873 res.pgbase = args.pgbase;
3874 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3876 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
3877 status += args.pgbase;
3880 nfs_invalidate_atime(dir);
3882 dprintk("%s: returns %d\n", __func__, status);
3886 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3887 u64 cookie, struct page **pages, unsigned int count, int plus)
3889 struct nfs4_exception exception = { };
3892 err = _nfs4_proc_readdir(dentry, cred, cookie,
3893 pages, count, plus);
3894 trace_nfs4_readdir(dentry->d_inode, err);
3895 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
3897 } while (exception.retry);
3901 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3902 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
3904 struct nfs4_createdata *data;
3905 int mode = sattr->ia_mode;
3906 int status = -ENOMEM;
3908 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3913 data->arg.ftype = NF4FIFO;
3914 else if (S_ISBLK(mode)) {
3915 data->arg.ftype = NF4BLK;
3916 data->arg.u.device.specdata1 = MAJOR(rdev);
3917 data->arg.u.device.specdata2 = MINOR(rdev);
3919 else if (S_ISCHR(mode)) {
3920 data->arg.ftype = NF4CHR;
3921 data->arg.u.device.specdata1 = MAJOR(rdev);
3922 data->arg.u.device.specdata2 = MINOR(rdev);
3923 } else if (!S_ISSOCK(mode)) {
3928 data->arg.label = label;
3929 status = nfs4_do_create(dir, dentry, data);
3931 nfs4_free_createdata(data);
3936 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3937 struct iattr *sattr, dev_t rdev)
3939 struct nfs4_exception exception = { };
3940 struct nfs4_label l, *label = NULL;
3943 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3945 sattr->ia_mode &= ~current_umask();
3947 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3948 trace_nfs4_mknod(dir, &dentry->d_name, err);
3949 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3951 } while (exception.retry);
3953 nfs4_label_release_security(label);
3958 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3959 struct nfs_fsstat *fsstat)
3961 struct nfs4_statfs_arg args = {
3963 .bitmask = server->attr_bitmask,
3965 struct nfs4_statfs_res res = {
3968 struct rpc_message msg = {
3969 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3974 nfs_fattr_init(fsstat->fattr);
3975 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3978 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3980 struct nfs4_exception exception = { };
3983 err = nfs4_handle_exception(server,
3984 _nfs4_proc_statfs(server, fhandle, fsstat),
3986 } while (exception.retry);
3990 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3991 struct nfs_fsinfo *fsinfo)
3993 struct nfs4_fsinfo_arg args = {
3995 .bitmask = server->attr_bitmask,
3997 struct nfs4_fsinfo_res res = {
4000 struct rpc_message msg = {
4001 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4006 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4009 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4011 struct nfs4_exception exception = { };
4012 unsigned long now = jiffies;
4016 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
4017 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
4019 struct nfs_client *clp = server->nfs_client;
4021 spin_lock(&clp->cl_lock);
4022 clp->cl_lease_time = fsinfo->lease_time * HZ;
4023 clp->cl_last_renewal = now;
4024 spin_unlock(&clp->cl_lock);
4027 err = nfs4_handle_exception(server, err, &exception);
4028 } while (exception.retry);
4032 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4036 nfs_fattr_init(fsinfo->fattr);
4037 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
4039 /* block layout checks this! */
4040 server->pnfs_blksize = fsinfo->blksize;
4041 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
4047 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4048 struct nfs_pathconf *pathconf)
4050 struct nfs4_pathconf_arg args = {
4052 .bitmask = server->attr_bitmask,
4054 struct nfs4_pathconf_res res = {
4055 .pathconf = pathconf,
4057 struct rpc_message msg = {
4058 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4063 /* None of the pathconf attributes are mandatory to implement */
4064 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4065 memset(pathconf, 0, sizeof(*pathconf));
4069 nfs_fattr_init(pathconf->fattr);
4070 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4073 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4074 struct nfs_pathconf *pathconf)
4076 struct nfs4_exception exception = { };
4080 err = nfs4_handle_exception(server,
4081 _nfs4_proc_pathconf(server, fhandle, pathconf),
4083 } while (exception.retry);
4087 int nfs4_set_rw_stateid(nfs4_stateid *stateid,
4088 const struct nfs_open_context *ctx,
4089 const struct nfs_lock_context *l_ctx,
4092 const struct nfs_lockowner *lockowner = NULL;
4095 lockowner = &l_ctx->lockowner;
4096 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
4098 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4100 static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4101 const struct nfs_open_context *ctx,
4102 const struct nfs_lock_context *l_ctx,
4105 nfs4_stateid current_stateid;
4107 /* If the current stateid represents a lost lock, then exit */
4108 if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode) == -EIO)
4110 return nfs4_stateid_match(stateid, ¤t_stateid);
4113 static bool nfs4_error_stateid_expired(int err)
4116 case -NFS4ERR_DELEG_REVOKED:
4117 case -NFS4ERR_ADMIN_REVOKED:
4118 case -NFS4ERR_BAD_STATEID:
4119 case -NFS4ERR_STALE_STATEID:
4120 case -NFS4ERR_OLD_STATEID:
4121 case -NFS4ERR_OPENMODE:
4122 case -NFS4ERR_EXPIRED:
4128 void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
4130 nfs_invalidate_atime(hdr->inode);
4133 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
4135 struct nfs_server *server = NFS_SERVER(hdr->inode);
4137 trace_nfs4_read(hdr, task->tk_status);
4138 if (nfs4_async_handle_error(task, server,
4139 hdr->args.context->state,
4141 rpc_restart_call_prepare(task);
4145 __nfs4_read_done_cb(hdr);
4146 if (task->tk_status > 0)
4147 renew_lease(server, hdr->timestamp);
4151 static bool nfs4_read_stateid_changed(struct rpc_task *task,
4152 struct nfs_pgio_args *args)
4155 if (!nfs4_error_stateid_expired(task->tk_status) ||
4156 nfs4_stateid_is_current(&args->stateid,
4161 rpc_restart_call_prepare(task);
4165 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4168 dprintk("--> %s\n", __func__);
4170 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4172 if (nfs4_read_stateid_changed(task, &hdr->args))
4174 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4175 nfs4_read_done_cb(task, hdr);
4178 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4179 struct rpc_message *msg)
4181 hdr->timestamp = jiffies;
4182 hdr->pgio_done_cb = nfs4_read_done_cb;
4183 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
4184 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
4187 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4188 struct nfs_pgio_header *hdr)
4190 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4191 &hdr->args.seq_args,
4195 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4196 hdr->args.lock_context,
4197 hdr->rw_ops->rw_mode) == -EIO)
4199 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
4204 static int nfs4_write_done_cb(struct rpc_task *task,
4205 struct nfs_pgio_header *hdr)
4207 struct inode *inode = hdr->inode;
4209 trace_nfs4_write(hdr, task->tk_status);
4210 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4211 hdr->args.context->state,
4213 rpc_restart_call_prepare(task);
4216 if (task->tk_status >= 0) {
4217 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4218 nfs_post_op_update_inode_force_wcc(inode, &hdr->fattr);
4223 static bool nfs4_write_stateid_changed(struct rpc_task *task,
4224 struct nfs_pgio_args *args)
4227 if (!nfs4_error_stateid_expired(task->tk_status) ||
4228 nfs4_stateid_is_current(&args->stateid,
4233 rpc_restart_call_prepare(task);
4237 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4239 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4241 if (nfs4_write_stateid_changed(task, &hdr->args))
4243 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4244 nfs4_write_done_cb(task, hdr);
4248 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
4250 /* Don't request attributes for pNFS or O_DIRECT writes */
4251 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
4253 /* Otherwise, request attributes if and only if we don't hold
4256 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
4259 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4260 struct rpc_message *msg)
4262 struct nfs_server *server = NFS_SERVER(hdr->inode);
4264 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4265 hdr->args.bitmask = NULL;
4266 hdr->res.fattr = NULL;
4268 hdr->args.bitmask = server->cache_consistency_bitmask;
4270 if (!hdr->pgio_done_cb)
4271 hdr->pgio_done_cb = nfs4_write_done_cb;
4272 hdr->res.server = server;
4273 hdr->timestamp = jiffies;
4275 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
4276 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
4279 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
4281 nfs4_setup_sequence(NFS_SERVER(data->inode),
4282 &data->args.seq_args,
4287 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
4289 struct inode *inode = data->inode;
4291 trace_nfs4_commit(data, task->tk_status);
4292 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4293 NULL, NULL) == -EAGAIN) {
4294 rpc_restart_call_prepare(task);
4300 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
4302 if (!nfs4_sequence_done(task, &data->res.seq_res))
4304 return data->commit_done_cb(task, data);
4307 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
4309 struct nfs_server *server = NFS_SERVER(data->inode);
4311 if (data->commit_done_cb == NULL)
4312 data->commit_done_cb = nfs4_commit_done_cb;
4313 data->res.server = server;
4314 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
4315 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4318 struct nfs4_renewdata {
4319 struct nfs_client *client;
4320 unsigned long timestamp;
4324 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4325 * standalone procedure for queueing an asynchronous RENEW.
4327 static void nfs4_renew_release(void *calldata)
4329 struct nfs4_renewdata *data = calldata;
4330 struct nfs_client *clp = data->client;
4332 if (atomic_read(&clp->cl_count) > 1)
4333 nfs4_schedule_state_renewal(clp);
4334 nfs_put_client(clp);
4338 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
4340 struct nfs4_renewdata *data = calldata;
4341 struct nfs_client *clp = data->client;
4342 unsigned long timestamp = data->timestamp;
4344 trace_nfs4_renew_async(clp, task->tk_status);
4345 switch (task->tk_status) {
4348 case -NFS4ERR_LEASE_MOVED:
4349 nfs4_schedule_lease_moved_recovery(clp);
4352 /* Unless we're shutting down, schedule state recovery! */
4353 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4355 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
4356 nfs4_schedule_lease_recovery(clp);
4359 nfs4_schedule_path_down_recovery(clp);
4361 do_renew_lease(clp, timestamp);
4364 static const struct rpc_call_ops nfs4_renew_ops = {
4365 .rpc_call_done = nfs4_renew_done,
4366 .rpc_release = nfs4_renew_release,
4369 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
4371 struct rpc_message msg = {
4372 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4376 struct nfs4_renewdata *data;
4378 if (renew_flags == 0)
4380 if (!atomic_inc_not_zero(&clp->cl_count))
4382 data = kmalloc(sizeof(*data), GFP_NOFS);
4386 data->timestamp = jiffies;
4387 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
4388 &nfs4_renew_ops, data);
4391 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
4393 struct rpc_message msg = {
4394 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4398 unsigned long now = jiffies;
4401 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4404 do_renew_lease(clp, now);
4408 static inline int nfs4_server_supports_acls(struct nfs_server *server)
4410 return server->caps & NFS_CAP_ACLS;
4413 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4414 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
4417 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
4419 static int buf_to_pages_noslab(const void *buf, size_t buflen,
4420 struct page **pages, unsigned int *pgbase)
4422 struct page *newpage, **spages;
4428 len = min_t(size_t, PAGE_SIZE, buflen);
4429 newpage = alloc_page(GFP_KERNEL);
4431 if (newpage == NULL)
4433 memcpy(page_address(newpage), buf, len);
4438 } while (buflen != 0);
4444 __free_page(spages[rc-1]);
4448 struct nfs4_cached_acl {
4454 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4456 struct nfs_inode *nfsi = NFS_I(inode);
4458 spin_lock(&inode->i_lock);
4459 kfree(nfsi->nfs4_acl);
4460 nfsi->nfs4_acl = acl;
4461 spin_unlock(&inode->i_lock);
4464 static void nfs4_zap_acl_attr(struct inode *inode)
4466 nfs4_set_cached_acl(inode, NULL);
4469 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4471 struct nfs_inode *nfsi = NFS_I(inode);
4472 struct nfs4_cached_acl *acl;
4475 spin_lock(&inode->i_lock);
4476 acl = nfsi->nfs4_acl;
4479 if (buf == NULL) /* user is just asking for length */
4481 if (acl->cached == 0)
4483 ret = -ERANGE; /* see getxattr(2) man page */
4484 if (acl->len > buflen)
4486 memcpy(buf, acl->data, acl->len);
4490 spin_unlock(&inode->i_lock);
4494 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
4496 struct nfs4_cached_acl *acl;
4497 size_t buflen = sizeof(*acl) + acl_len;
4499 if (buflen <= PAGE_SIZE) {
4500 acl = kmalloc(buflen, GFP_KERNEL);
4504 _copy_from_pages(acl->data, pages, pgbase, acl_len);
4506 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4513 nfs4_set_cached_acl(inode, acl);
4517 * The getxattr API returns the required buffer length when called with a
4518 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4519 * the required buf. On a NULL buf, we send a page of data to the server
4520 * guessing that the ACL request can be serviced by a page. If so, we cache
4521 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4522 * the cache. If not so, we throw away the page, and cache the required
4523 * length. The next getxattr call will then produce another round trip to
4524 * the server, this time with the input buf of the required size.
4526 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4528 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
4529 struct nfs_getaclargs args = {
4530 .fh = NFS_FH(inode),
4534 struct nfs_getaclres res = {
4537 struct rpc_message msg = {
4538 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4542 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4543 int ret = -ENOMEM, i;
4545 /* As long as we're doing a round trip to the server anyway,
4546 * let's be prepared for a page of acl data. */
4549 if (npages > ARRAY_SIZE(pages))
4552 for (i = 0; i < npages; i++) {
4553 pages[i] = alloc_page(GFP_KERNEL);
4558 /* for decoding across pages */
4559 res.acl_scratch = alloc_page(GFP_KERNEL);
4560 if (!res.acl_scratch)
4563 args.acl_len = npages * PAGE_SIZE;
4564 args.acl_pgbase = 0;
4566 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
4567 __func__, buf, buflen, npages, args.acl_len);
4568 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4569 &msg, &args.seq_args, &res.seq_res, 0);
4573 /* Handle the case where the passed-in buffer is too short */
4574 if (res.acl_flags & NFS4_ACL_TRUNC) {
4575 /* Did the user only issue a request for the acl length? */
4581 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
4583 if (res.acl_len > buflen) {
4587 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
4592 for (i = 0; i < npages; i++)
4594 __free_page(pages[i]);
4595 if (res.acl_scratch)
4596 __free_page(res.acl_scratch);
4600 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4602 struct nfs4_exception exception = { };
4605 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4606 trace_nfs4_get_acl(inode, ret);
4609 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4610 } while (exception.retry);
4614 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4616 struct nfs_server *server = NFS_SERVER(inode);
4619 if (!nfs4_server_supports_acls(server))
4621 ret = nfs_revalidate_inode(server, inode);
4624 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4625 nfs_zap_acl_cache(inode);
4626 ret = nfs4_read_cached_acl(inode, buf, buflen);
4628 /* -ENOENT is returned if there is no ACL or if there is an ACL
4629 * but no cached acl data, just the acl length */
4631 return nfs4_get_acl_uncached(inode, buf, buflen);
4634 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4636 struct nfs_server *server = NFS_SERVER(inode);
4637 struct page *pages[NFS4ACL_MAXPAGES];
4638 struct nfs_setaclargs arg = {
4639 .fh = NFS_FH(inode),
4643 struct nfs_setaclres res;
4644 struct rpc_message msg = {
4645 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4649 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4652 if (!nfs4_server_supports_acls(server))
4654 if (npages > ARRAY_SIZE(pages))
4656 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4659 nfs4_inode_return_delegation(inode);
4660 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4663 * Free each page after tx, so the only ref left is
4664 * held by the network stack
4667 put_page(pages[i-1]);
4670 * Acl update can result in inode attribute update.
4671 * so mark the attribute cache invalid.
4673 spin_lock(&inode->i_lock);
4674 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4675 spin_unlock(&inode->i_lock);
4676 nfs_access_zap_cache(inode);
4677 nfs_zap_acl_cache(inode);
4681 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4683 struct nfs4_exception exception = { };
4686 err = __nfs4_proc_set_acl(inode, buf, buflen);
4687 trace_nfs4_set_acl(inode, err);
4688 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4690 } while (exception.retry);
4694 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
4695 static int _nfs4_get_security_label(struct inode *inode, void *buf,
4698 struct nfs_server *server = NFS_SERVER(inode);
4699 struct nfs_fattr fattr;
4700 struct nfs4_label label = {0, 0, buflen, buf};
4702 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4703 struct nfs4_getattr_arg arg = {
4704 .fh = NFS_FH(inode),
4707 struct nfs4_getattr_res res = {
4712 struct rpc_message msg = {
4713 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4719 nfs_fattr_init(&fattr);
4721 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
4724 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4726 if (buflen < label.len)
4731 static int nfs4_get_security_label(struct inode *inode, void *buf,
4734 struct nfs4_exception exception = { };
4737 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4741 err = _nfs4_get_security_label(inode, buf, buflen);
4742 trace_nfs4_get_security_label(inode, err);
4743 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4745 } while (exception.retry);
4749 static int _nfs4_do_set_security_label(struct inode *inode,
4750 struct nfs4_label *ilabel,
4751 struct nfs_fattr *fattr,
4752 struct nfs4_label *olabel)
4755 struct iattr sattr = {0};
4756 struct nfs_server *server = NFS_SERVER(inode);
4757 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4758 struct nfs_setattrargs arg = {
4759 .fh = NFS_FH(inode),
4765 struct nfs_setattrres res = {
4770 struct rpc_message msg = {
4771 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
4777 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
4779 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4781 dprintk("%s failed: %d\n", __func__, status);
4786 static int nfs4_do_set_security_label(struct inode *inode,
4787 struct nfs4_label *ilabel,
4788 struct nfs_fattr *fattr,
4789 struct nfs4_label *olabel)
4791 struct nfs4_exception exception = { };
4795 err = _nfs4_do_set_security_label(inode, ilabel,
4797 trace_nfs4_set_security_label(inode, err);
4798 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4800 } while (exception.retry);
4805 nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4807 struct nfs4_label ilabel, *olabel = NULL;
4808 struct nfs_fattr fattr;
4809 struct rpc_cred *cred;
4810 struct inode *inode = dentry->d_inode;
4813 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4816 nfs_fattr_init(&fattr);
4820 ilabel.label = (char *)buf;
4821 ilabel.len = buflen;
4823 cred = rpc_lookup_cred();
4825 return PTR_ERR(cred);
4827 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4828 if (IS_ERR(olabel)) {
4829 status = -PTR_ERR(olabel);
4833 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4835 nfs_setsecurity(inode, &fattr, olabel);
4837 nfs4_label_free(olabel);
4842 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4846 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
4847 struct nfs4_state *state, long *timeout)
4849 struct nfs_client *clp = server->nfs_client;
4851 if (task->tk_status >= 0)
4853 switch(task->tk_status) {
4854 case -NFS4ERR_DELEG_REVOKED:
4855 case -NFS4ERR_ADMIN_REVOKED:
4856 case -NFS4ERR_BAD_STATEID:
4857 case -NFS4ERR_OPENMODE:
4860 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4861 goto recovery_failed;
4862 goto wait_on_recovery;
4863 case -NFS4ERR_EXPIRED:
4864 if (state != NULL) {
4865 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4866 goto recovery_failed;
4868 case -NFS4ERR_STALE_STATEID:
4869 case -NFS4ERR_STALE_CLIENTID:
4870 nfs4_schedule_lease_recovery(clp);
4871 goto wait_on_recovery;
4872 case -NFS4ERR_MOVED:
4873 if (nfs4_schedule_migration_recovery(server) < 0)
4874 goto recovery_failed;
4875 goto wait_on_recovery;
4876 case -NFS4ERR_LEASE_MOVED:
4877 nfs4_schedule_lease_moved_recovery(clp);
4878 goto wait_on_recovery;
4879 #if defined(CONFIG_NFS_V4_1)
4880 case -NFS4ERR_BADSESSION:
4881 case -NFS4ERR_BADSLOT:
4882 case -NFS4ERR_BAD_HIGH_SLOT:
4883 case -NFS4ERR_DEADSESSION:
4884 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4885 case -NFS4ERR_SEQ_FALSE_RETRY:
4886 case -NFS4ERR_SEQ_MISORDERED:
4887 dprintk("%s ERROR %d, Reset session\n", __func__,
4889 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4890 goto wait_on_recovery;
4891 #endif /* CONFIG_NFS_V4_1 */
4892 case -NFS4ERR_DELAY:
4893 nfs_inc_server_stats(server, NFSIOS_DELAY);
4894 rpc_delay(task, nfs4_update_delay(timeout));
4896 case -NFS4ERR_GRACE:
4897 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4898 case -NFS4ERR_RETRY_UNCACHED_REP:
4899 case -NFS4ERR_OLD_STATEID:
4902 task->tk_status = nfs4_map_errors(task->tk_status);
4905 task->tk_status = -EIO;
4908 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
4909 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4910 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4911 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4912 goto recovery_failed;
4914 task->tk_status = 0;
4918 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4919 nfs4_verifier *bootverf)
4923 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4924 /* An impossible timestamp guarantees this value
4925 * will never match a generated boot time. */
4927 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
4929 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4930 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4931 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
4933 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4937 nfs4_init_nonuniform_client_string(struct nfs_client *clp,
4938 char *buf, size_t len)
4940 unsigned int result;
4942 if (clp->cl_owner_id != NULL)
4943 return strlcpy(buf, clp->cl_owner_id, len);
4946 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4948 rpc_peeraddr2str(clp->cl_rpcclient,
4950 rpc_peeraddr2str(clp->cl_rpcclient,
4951 RPC_DISPLAY_PROTO));
4953 clp->cl_owner_id = kstrdup(buf, GFP_KERNEL);
4958 nfs4_init_uniform_client_string(struct nfs_client *clp,
4959 char *buf, size_t len)
4961 const char *nodename = clp->cl_rpcclient->cl_nodename;
4962 unsigned int result;
4964 if (clp->cl_owner_id != NULL)
4965 return strlcpy(buf, clp->cl_owner_id, len);
4967 if (nfs4_client_id_uniquifier[0] != '\0')
4968 result = scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4969 clp->rpc_ops->version,
4970 clp->cl_minorversion,
4971 nfs4_client_id_uniquifier,
4974 result = scnprintf(buf, len, "Linux NFSv%u.%u %s",
4975 clp->rpc_ops->version, clp->cl_minorversion,
4977 clp->cl_owner_id = kstrdup(buf, GFP_KERNEL);
4982 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
4983 * services. Advertise one based on the address family of the
4987 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
4989 if (strchr(clp->cl_ipaddr, ':') != NULL)
4990 return scnprintf(buf, len, "tcp6");
4992 return scnprintf(buf, len, "tcp");
4995 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
4997 struct nfs4_setclientid *sc = calldata;
4999 if (task->tk_status == 0)
5000 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5003 static const struct rpc_call_ops nfs4_setclientid_ops = {
5004 .rpc_call_done = nfs4_setclientid_done,
5008 * nfs4_proc_setclientid - Negotiate client ID
5009 * @clp: state data structure
5010 * @program: RPC program for NFSv4 callback service
5011 * @port: IP port number for NFS4 callback service
5012 * @cred: RPC credential to use for this call
5013 * @res: where to place the result
5015 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5017 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5018 unsigned short port, struct rpc_cred *cred,
5019 struct nfs4_setclientid_res *res)
5021 nfs4_verifier sc_verifier;
5022 struct nfs4_setclientid setclientid = {
5023 .sc_verifier = &sc_verifier,
5025 .sc_cb_ident = clp->cl_cb_ident,
5027 struct rpc_message msg = {
5028 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5029 .rpc_argp = &setclientid,
5033 struct rpc_task *task;
5034 struct rpc_task_setup task_setup_data = {
5035 .rpc_client = clp->cl_rpcclient,
5036 .rpc_message = &msg,
5037 .callback_ops = &nfs4_setclientid_ops,
5038 .callback_data = &setclientid,
5039 .flags = RPC_TASK_TIMEOUT,
5043 /* nfs_client_id4 */
5044 nfs4_init_boot_verifier(clp, &sc_verifier);
5045 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5046 setclientid.sc_name_len =
5047 nfs4_init_uniform_client_string(clp,
5048 setclientid.sc_name,
5049 sizeof(setclientid.sc_name));
5051 setclientid.sc_name_len =
5052 nfs4_init_nonuniform_client_string(clp,
5053 setclientid.sc_name,
5054 sizeof(setclientid.sc_name));
5056 setclientid.sc_netid_len =
5057 nfs4_init_callback_netid(clp,
5058 setclientid.sc_netid,
5059 sizeof(setclientid.sc_netid));
5060 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
5061 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
5062 clp->cl_ipaddr, port >> 8, port & 255);
5064 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
5065 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5066 setclientid.sc_name_len, setclientid.sc_name);
5067 task = rpc_run_task(&task_setup_data);
5069 status = PTR_ERR(task);
5072 status = task->tk_status;
5073 if (setclientid.sc_cred) {
5074 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5075 put_rpccred(setclientid.sc_cred);
5079 trace_nfs4_setclientid(clp, status);
5080 dprintk("NFS reply setclientid: %d\n", status);
5085 * nfs4_proc_setclientid_confirm - Confirm client ID
5086 * @clp: state data structure
5087 * @res: result of a previous SETCLIENTID
5088 * @cred: RPC credential to use for this call
5090 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5092 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
5093 struct nfs4_setclientid_res *arg,
5094 struct rpc_cred *cred)
5096 struct rpc_message msg = {
5097 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
5103 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5104 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5106 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5107 trace_nfs4_setclientid_confirm(clp, status);
5108 dprintk("NFS reply setclientid_confirm: %d\n", status);
5112 struct nfs4_delegreturndata {
5113 struct nfs4_delegreturnargs args;
5114 struct nfs4_delegreturnres res;
5116 nfs4_stateid stateid;
5117 unsigned long timestamp;
5118 struct nfs_fattr fattr;
5120 struct inode *inode;
5125 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5127 struct nfs4_delegreturndata *data = calldata;
5129 if (!nfs4_sequence_done(task, &data->res.seq_res))
5132 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
5133 switch (task->tk_status) {
5135 renew_lease(data->res.server, data->timestamp);
5136 case -NFS4ERR_ADMIN_REVOKED:
5137 case -NFS4ERR_DELEG_REVOKED:
5138 case -NFS4ERR_BAD_STATEID:
5139 case -NFS4ERR_OLD_STATEID:
5140 case -NFS4ERR_STALE_STATEID:
5141 case -NFS4ERR_EXPIRED:
5142 task->tk_status = 0;
5144 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
5147 if (nfs4_async_handle_error(task, data->res.server,
5148 NULL, NULL) == -EAGAIN) {
5149 rpc_restart_call_prepare(task);
5153 data->rpc_status = task->tk_status;
5156 static void nfs4_delegreturn_release(void *calldata)
5158 struct nfs4_delegreturndata *data = calldata;
5161 pnfs_roc_release(data->inode);
5165 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5167 struct nfs4_delegreturndata *d_data;
5169 d_data = (struct nfs4_delegreturndata *)data;
5172 pnfs_roc_drain(d_data->inode, &d_data->roc_barrier, task))
5175 nfs4_setup_sequence(d_data->res.server,
5176 &d_data->args.seq_args,
5177 &d_data->res.seq_res,
5181 static const struct rpc_call_ops nfs4_delegreturn_ops = {
5182 .rpc_call_prepare = nfs4_delegreturn_prepare,
5183 .rpc_call_done = nfs4_delegreturn_done,
5184 .rpc_release = nfs4_delegreturn_release,
5187 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5189 struct nfs4_delegreturndata *data;
5190 struct nfs_server *server = NFS_SERVER(inode);
5191 struct rpc_task *task;
5192 struct rpc_message msg = {
5193 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5196 struct rpc_task_setup task_setup_data = {
5197 .rpc_client = server->client,
5198 .rpc_message = &msg,
5199 .callback_ops = &nfs4_delegreturn_ops,
5200 .flags = RPC_TASK_ASYNC,
5204 data = kzalloc(sizeof(*data), GFP_NOFS);
5207 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
5208 data->args.fhandle = &data->fh;
5209 data->args.stateid = &data->stateid;
5210 data->args.bitmask = server->cache_consistency_bitmask;
5211 nfs_copy_fh(&data->fh, NFS_FH(inode));
5212 nfs4_stateid_copy(&data->stateid, stateid);
5213 data->res.fattr = &data->fattr;
5214 data->res.server = server;
5215 nfs_fattr_init(data->res.fattr);
5216 data->timestamp = jiffies;
5217 data->rpc_status = 0;
5218 data->inode = inode;
5219 data->roc = list_empty(&NFS_I(inode)->open_files) ?
5220 pnfs_roc(inode) : false;
5222 task_setup_data.callback_data = data;
5223 msg.rpc_argp = &data->args;
5224 msg.rpc_resp = &data->res;
5225 task = rpc_run_task(&task_setup_data);
5227 return PTR_ERR(task);
5230 status = nfs4_wait_for_completion_rpc_task(task);
5233 status = data->rpc_status;
5235 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5237 nfs_refresh_inode(inode, &data->fattr);
5243 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5245 struct nfs_server *server = NFS_SERVER(inode);
5246 struct nfs4_exception exception = { };
5249 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
5250 trace_nfs4_delegreturn(inode, err);
5252 case -NFS4ERR_STALE_STATEID:
5253 case -NFS4ERR_EXPIRED:
5257 err = nfs4_handle_exception(server, err, &exception);
5258 } while (exception.retry);
5262 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5263 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5266 * sleep, with exponential backoff, and retry the LOCK operation.
5268 static unsigned long
5269 nfs4_set_lock_task_retry(unsigned long timeout)
5271 freezable_schedule_timeout_killable_unsafe(timeout);
5273 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5274 return NFS4_LOCK_MAXTIMEOUT;
5278 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5280 struct inode *inode = state->inode;
5281 struct nfs_server *server = NFS_SERVER(inode);
5282 struct nfs_client *clp = server->nfs_client;
5283 struct nfs_lockt_args arg = {
5284 .fh = NFS_FH(inode),
5287 struct nfs_lockt_res res = {
5290 struct rpc_message msg = {
5291 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5294 .rpc_cred = state->owner->so_cred,
5296 struct nfs4_lock_state *lsp;
5299 arg.lock_owner.clientid = clp->cl_clientid;
5300 status = nfs4_set_lock_state(state, request);
5303 lsp = request->fl_u.nfs4_fl.owner;
5304 arg.lock_owner.id = lsp->ls_seqid.owner_id;
5305 arg.lock_owner.s_dev = server->s_dev;
5306 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5309 request->fl_type = F_UNLCK;
5311 case -NFS4ERR_DENIED:
5314 request->fl_ops->fl_release_private(request);
5315 request->fl_ops = NULL;
5320 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5322 struct nfs4_exception exception = { };
5326 err = _nfs4_proc_getlk(state, cmd, request);
5327 trace_nfs4_get_lock(request, state, cmd, err);
5328 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
5330 } while (exception.retry);
5334 static int do_vfs_lock(struct file *file, struct file_lock *fl)
5337 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5339 res = posix_lock_file_wait(file, fl);
5342 res = flock_lock_file_wait(file, fl);
5350 struct nfs4_unlockdata {
5351 struct nfs_locku_args arg;
5352 struct nfs_locku_res res;
5353 struct nfs4_lock_state *lsp;
5354 struct nfs_open_context *ctx;
5355 struct file_lock fl;
5356 const struct nfs_server *server;
5357 unsigned long timestamp;
5360 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5361 struct nfs_open_context *ctx,
5362 struct nfs4_lock_state *lsp,
5363 struct nfs_seqid *seqid)
5365 struct nfs4_unlockdata *p;
5366 struct inode *inode = lsp->ls_state->inode;
5368 p = kzalloc(sizeof(*p), GFP_NOFS);
5371 p->arg.fh = NFS_FH(inode);
5373 p->arg.seqid = seqid;
5374 p->res.seqid = seqid;
5375 p->arg.stateid = &lsp->ls_stateid;
5377 atomic_inc(&lsp->ls_count);
5378 /* Ensure we don't close file until we're done freeing locks! */
5379 p->ctx = get_nfs_open_context(ctx);
5380 memcpy(&p->fl, fl, sizeof(p->fl));
5381 p->server = NFS_SERVER(inode);
5385 static void nfs4_locku_release_calldata(void *data)
5387 struct nfs4_unlockdata *calldata = data;
5388 nfs_free_seqid(calldata->arg.seqid);
5389 nfs4_put_lock_state(calldata->lsp);
5390 put_nfs_open_context(calldata->ctx);
5394 static void nfs4_locku_done(struct rpc_task *task, void *data)
5396 struct nfs4_unlockdata *calldata = data;
5398 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5400 switch (task->tk_status) {
5402 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5403 &calldata->res.stateid);
5404 renew_lease(calldata->server, calldata->timestamp);
5406 case -NFS4ERR_BAD_STATEID:
5407 case -NFS4ERR_OLD_STATEID:
5408 case -NFS4ERR_STALE_STATEID:
5409 case -NFS4ERR_EXPIRED:
5412 if (nfs4_async_handle_error(task, calldata->server,
5413 NULL, NULL) == -EAGAIN)
5414 rpc_restart_call_prepare(task);
5416 nfs_release_seqid(calldata->arg.seqid);
5419 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
5421 struct nfs4_unlockdata *calldata = data;
5423 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
5425 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
5426 /* Note: exit _without_ running nfs4_locku_done */
5429 calldata->timestamp = jiffies;
5430 if (nfs4_setup_sequence(calldata->server,
5431 &calldata->arg.seq_args,
5432 &calldata->res.seq_res,
5434 nfs_release_seqid(calldata->arg.seqid);
5437 task->tk_action = NULL;
5439 nfs4_sequence_done(task, &calldata->res.seq_res);
5442 static const struct rpc_call_ops nfs4_locku_ops = {
5443 .rpc_call_prepare = nfs4_locku_prepare,
5444 .rpc_call_done = nfs4_locku_done,
5445 .rpc_release = nfs4_locku_release_calldata,
5448 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5449 struct nfs_open_context *ctx,
5450 struct nfs4_lock_state *lsp,
5451 struct nfs_seqid *seqid)
5453 struct nfs4_unlockdata *data;
5454 struct rpc_message msg = {
5455 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5456 .rpc_cred = ctx->cred,
5458 struct rpc_task_setup task_setup_data = {
5459 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5460 .rpc_message = &msg,
5461 .callback_ops = &nfs4_locku_ops,
5462 .workqueue = nfsiod_workqueue,
5463 .flags = RPC_TASK_ASYNC,
5466 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5467 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5469 /* Ensure this is an unlock - when canceling a lock, the
5470 * canceled lock is passed in, and it won't be an unlock.
5472 fl->fl_type = F_UNLCK;
5474 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5476 nfs_free_seqid(seqid);
5477 return ERR_PTR(-ENOMEM);
5480 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5481 msg.rpc_argp = &data->arg;
5482 msg.rpc_resp = &data->res;
5483 task_setup_data.callback_data = data;
5484 return rpc_run_task(&task_setup_data);
5487 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5489 struct inode *inode = state->inode;
5490 struct nfs4_state_owner *sp = state->owner;
5491 struct nfs_inode *nfsi = NFS_I(inode);
5492 struct nfs_seqid *seqid;
5493 struct nfs4_lock_state *lsp;
5494 struct rpc_task *task;
5496 unsigned char fl_flags = request->fl_flags;
5498 status = nfs4_set_lock_state(state, request);
5499 /* Unlock _before_ we do the RPC call */
5500 request->fl_flags |= FL_EXISTS;
5501 /* Exclude nfs_delegation_claim_locks() */
5502 mutex_lock(&sp->so_delegreturn_mutex);
5503 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
5504 down_read(&nfsi->rwsem);
5505 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5506 up_read(&nfsi->rwsem);
5507 mutex_unlock(&sp->so_delegreturn_mutex);
5510 up_read(&nfsi->rwsem);
5511 mutex_unlock(&sp->so_delegreturn_mutex);
5514 /* Is this a delegated lock? */
5515 lsp = request->fl_u.nfs4_fl.owner;
5516 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5518 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
5522 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
5523 status = PTR_ERR(task);
5526 status = nfs4_wait_for_completion_rpc_task(task);
5529 request->fl_flags = fl_flags;
5530 trace_nfs4_unlock(request, state, F_SETLK, status);
5534 struct nfs4_lockdata {
5535 struct nfs_lock_args arg;
5536 struct nfs_lock_res res;
5537 struct nfs4_lock_state *lsp;
5538 struct nfs_open_context *ctx;
5539 struct file_lock fl;
5540 unsigned long timestamp;
5543 struct nfs_server *server;
5546 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
5547 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5550 struct nfs4_lockdata *p;
5551 struct inode *inode = lsp->ls_state->inode;
5552 struct nfs_server *server = NFS_SERVER(inode);
5554 p = kzalloc(sizeof(*p), gfp_mask);
5558 p->arg.fh = NFS_FH(inode);
5560 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
5561 if (IS_ERR(p->arg.open_seqid))
5563 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
5564 if (IS_ERR(p->arg.lock_seqid))
5565 goto out_free_seqid;
5566 p->arg.lock_stateid = &lsp->ls_stateid;
5567 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
5568 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
5569 p->arg.lock_owner.s_dev = server->s_dev;
5570 p->res.lock_seqid = p->arg.lock_seqid;
5573 atomic_inc(&lsp->ls_count);
5574 p->ctx = get_nfs_open_context(ctx);
5575 memcpy(&p->fl, fl, sizeof(p->fl));
5578 nfs_free_seqid(p->arg.open_seqid);
5584 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5586 struct nfs4_lockdata *data = calldata;
5587 struct nfs4_state *state = data->lsp->ls_state;
5589 dprintk("%s: begin!\n", __func__);
5590 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
5592 /* Do we need to do an open_to_lock_owner? */
5593 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
5594 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
5595 goto out_release_lock_seqid;
5597 data->arg.open_stateid = &state->open_stateid;
5598 data->arg.new_lock_owner = 1;
5599 data->res.open_seqid = data->arg.open_seqid;
5601 data->arg.new_lock_owner = 0;
5602 if (!nfs4_valid_open_stateid(state)) {
5603 data->rpc_status = -EBADF;
5604 task->tk_action = NULL;
5605 goto out_release_open_seqid;
5607 data->timestamp = jiffies;
5608 if (nfs4_setup_sequence(data->server,
5609 &data->arg.seq_args,
5613 out_release_open_seqid:
5614 nfs_release_seqid(data->arg.open_seqid);
5615 out_release_lock_seqid:
5616 nfs_release_seqid(data->arg.lock_seqid);
5618 nfs4_sequence_done(task, &data->res.seq_res);
5619 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
5622 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5624 struct nfs4_lockdata *data = calldata;
5626 dprintk("%s: begin!\n", __func__);
5628 if (!nfs4_sequence_done(task, &data->res.seq_res))
5631 data->rpc_status = task->tk_status;
5632 if (data->arg.new_lock_owner != 0) {
5633 if (data->rpc_status == 0)
5634 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5638 if (data->rpc_status == 0) {
5639 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
5640 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
5641 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
5644 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
5647 static void nfs4_lock_release(void *calldata)
5649 struct nfs4_lockdata *data = calldata;
5651 dprintk("%s: begin!\n", __func__);
5652 nfs_free_seqid(data->arg.open_seqid);
5653 if (data->cancelled != 0) {
5654 struct rpc_task *task;
5655 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5656 data->arg.lock_seqid);
5658 rpc_put_task_async(task);
5659 dprintk("%s: cancelling lock!\n", __func__);
5661 nfs_free_seqid(data->arg.lock_seqid);
5662 nfs4_put_lock_state(data->lsp);
5663 put_nfs_open_context(data->ctx);
5665 dprintk("%s: done!\n", __func__);
5668 static const struct rpc_call_ops nfs4_lock_ops = {
5669 .rpc_call_prepare = nfs4_lock_prepare,
5670 .rpc_call_done = nfs4_lock_done,
5671 .rpc_release = nfs4_lock_release,
5674 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5677 case -NFS4ERR_ADMIN_REVOKED:
5678 case -NFS4ERR_BAD_STATEID:
5679 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
5680 if (new_lock_owner != 0 ||
5681 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
5682 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
5684 case -NFS4ERR_STALE_STATEID:
5685 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
5686 case -NFS4ERR_EXPIRED:
5687 nfs4_schedule_lease_recovery(server->nfs_client);
5691 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
5693 struct nfs4_lockdata *data;
5694 struct rpc_task *task;
5695 struct rpc_message msg = {
5696 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5697 .rpc_cred = state->owner->so_cred,
5699 struct rpc_task_setup task_setup_data = {
5700 .rpc_client = NFS_CLIENT(state->inode),
5701 .rpc_message = &msg,
5702 .callback_ops = &nfs4_lock_ops,
5703 .workqueue = nfsiod_workqueue,
5704 .flags = RPC_TASK_ASYNC,
5708 dprintk("%s: begin!\n", __func__);
5709 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
5710 fl->fl_u.nfs4_fl.owner,
5711 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
5715 data->arg.block = 1;
5716 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5717 msg.rpc_argp = &data->arg;
5718 msg.rpc_resp = &data->res;
5719 task_setup_data.callback_data = data;
5720 if (recovery_type > NFS_LOCK_NEW) {
5721 if (recovery_type == NFS_LOCK_RECLAIM)
5722 data->arg.reclaim = NFS_LOCK_RECLAIM;
5723 nfs4_set_sequence_privileged(&data->arg.seq_args);
5725 task = rpc_run_task(&task_setup_data);
5727 return PTR_ERR(task);
5728 ret = nfs4_wait_for_completion_rpc_task(task);
5730 ret = data->rpc_status;
5732 nfs4_handle_setlk_error(data->server, data->lsp,
5733 data->arg.new_lock_owner, ret);
5735 data->cancelled = 1;
5737 dprintk("%s: done, ret = %d!\n", __func__, ret);
5741 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5743 struct nfs_server *server = NFS_SERVER(state->inode);
5744 struct nfs4_exception exception = {
5745 .inode = state->inode,
5750 /* Cache the lock if possible... */
5751 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5753 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
5754 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
5755 if (err != -NFS4ERR_DELAY)
5757 nfs4_handle_exception(server, err, &exception);
5758 } while (exception.retry);
5762 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5764 struct nfs_server *server = NFS_SERVER(state->inode);
5765 struct nfs4_exception exception = {
5766 .inode = state->inode,
5770 err = nfs4_set_lock_state(state, request);
5773 if (!recover_lost_locks) {
5774 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5778 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5780 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
5781 trace_nfs4_lock_expired(request, state, F_SETLK, err);
5785 case -NFS4ERR_GRACE:
5786 case -NFS4ERR_DELAY:
5787 nfs4_handle_exception(server, err, &exception);
5790 } while (exception.retry);
5795 #if defined(CONFIG_NFS_V4_1)
5797 * nfs41_check_expired_locks - possibly free a lock stateid
5799 * @state: NFSv4 state for an inode
5801 * Returns NFS_OK if recovery for this stateid is now finished.
5802 * Otherwise a negative NFS4ERR value is returned.
5804 static int nfs41_check_expired_locks(struct nfs4_state *state)
5806 int status, ret = -NFS4ERR_BAD_STATEID;
5807 struct nfs4_lock_state *lsp;
5808 struct nfs_server *server = NFS_SERVER(state->inode);
5810 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
5811 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
5812 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5814 status = nfs41_test_stateid(server,
5817 trace_nfs4_test_lock_stateid(state, lsp, status);
5818 if (status != NFS_OK) {
5819 /* Free the stateid unless the server
5820 * informs us the stateid is unrecognized. */
5821 if (status != -NFS4ERR_BAD_STATEID)
5822 nfs41_free_stateid(server,
5825 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5834 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5836 int status = NFS_OK;
5838 if (test_bit(LK_STATE_IN_USE, &state->flags))
5839 status = nfs41_check_expired_locks(state);
5840 if (status != NFS_OK)
5841 status = nfs4_lock_expired(state, request);
5846 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5848 struct nfs4_state_owner *sp = state->owner;
5849 struct nfs_inode *nfsi = NFS_I(state->inode);
5850 unsigned char fl_flags = request->fl_flags;
5852 int status = -ENOLCK;
5854 if ((fl_flags & FL_POSIX) &&
5855 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5857 /* Is this a delegated open? */
5858 status = nfs4_set_lock_state(state, request);
5861 request->fl_flags |= FL_ACCESS;
5862 status = do_vfs_lock(request->fl_file, request);
5865 down_read(&nfsi->rwsem);
5866 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
5867 /* Yes: cache locks! */
5868 /* ...but avoid races with delegation recall... */
5869 request->fl_flags = fl_flags & ~FL_SLEEP;
5870 status = do_vfs_lock(request->fl_file, request);
5873 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5874 up_read(&nfsi->rwsem);
5875 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
5878 down_read(&nfsi->rwsem);
5879 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5880 status = -NFS4ERR_DELAY;
5883 /* Note: we always want to sleep here! */
5884 request->fl_flags = fl_flags | FL_SLEEP;
5885 if (do_vfs_lock(request->fl_file, request) < 0)
5886 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5887 "manager!\n", __func__);
5889 up_read(&nfsi->rwsem);
5891 request->fl_flags = fl_flags;
5895 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5897 struct nfs4_exception exception = {
5899 .inode = state->inode,
5904 err = _nfs4_proc_setlk(state, cmd, request);
5905 trace_nfs4_set_lock(request, state, cmd, err);
5906 if (err == -NFS4ERR_DENIED)
5908 err = nfs4_handle_exception(NFS_SERVER(state->inode),
5910 } while (exception.retry);
5915 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5917 struct nfs_open_context *ctx;
5918 struct nfs4_state *state;
5919 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5922 /* verify open state */
5923 ctx = nfs_file_open_context(filp);
5926 if (request->fl_start < 0 || request->fl_end < 0)
5929 if (IS_GETLK(cmd)) {
5931 return nfs4_proc_getlk(state, F_GETLK, request);
5935 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5938 if (request->fl_type == F_UNLCK) {
5940 return nfs4_proc_unlck(state, cmd, request);
5947 * Don't rely on the VFS having checked the file open mode,
5948 * since it won't do this for flock() locks.
5950 switch (request->fl_type) {
5952 if (!(filp->f_mode & FMODE_READ))
5956 if (!(filp->f_mode & FMODE_WRITE))
5961 status = nfs4_proc_setlk(state, cmd, request);
5962 if ((status != -EAGAIN) || IS_SETLK(cmd))
5964 timeout = nfs4_set_lock_task_retry(timeout);
5965 status = -ERESTARTSYS;
5968 } while(status < 0);
5972 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
5974 struct nfs_server *server = NFS_SERVER(state->inode);
5977 err = nfs4_set_lock_state(state, fl);
5980 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
5981 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
5984 struct nfs_release_lockowner_data {
5985 struct nfs4_lock_state *lsp;
5986 struct nfs_server *server;
5987 struct nfs_release_lockowner_args args;
5988 struct nfs_release_lockowner_res res;
5989 unsigned long timestamp;
5992 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
5994 struct nfs_release_lockowner_data *data = calldata;
5995 struct nfs_server *server = data->server;
5996 nfs40_setup_sequence(server, &data->args.seq_args,
5997 &data->res.seq_res, task);
5998 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5999 data->timestamp = jiffies;
6002 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6004 struct nfs_release_lockowner_data *data = calldata;
6005 struct nfs_server *server = data->server;
6007 nfs40_sequence_done(task, &data->res.seq_res);
6009 switch (task->tk_status) {
6011 renew_lease(server, data->timestamp);
6013 case -NFS4ERR_STALE_CLIENTID:
6014 case -NFS4ERR_EXPIRED:
6015 nfs4_schedule_lease_recovery(server->nfs_client);
6017 case -NFS4ERR_LEASE_MOVED:
6018 case -NFS4ERR_DELAY:
6019 if (nfs4_async_handle_error(task, server,
6020 NULL, NULL) == -EAGAIN)
6021 rpc_restart_call_prepare(task);
6025 static void nfs4_release_lockowner_release(void *calldata)
6027 struct nfs_release_lockowner_data *data = calldata;
6028 nfs4_free_lock_state(data->server, data->lsp);
6032 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
6033 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6034 .rpc_call_done = nfs4_release_lockowner_done,
6035 .rpc_release = nfs4_release_lockowner_release,
6039 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
6041 struct nfs_release_lockowner_data *data;
6042 struct rpc_message msg = {
6043 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6046 if (server->nfs_client->cl_mvops->minor_version != 0)
6049 data = kmalloc(sizeof(*data), GFP_NOFS);
6053 data->server = server;
6054 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6055 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6056 data->args.lock_owner.s_dev = server->s_dev;
6058 msg.rpc_argp = &data->args;
6059 msg.rpc_resp = &data->res;
6060 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
6061 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
6064 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6066 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6067 const void *buf, size_t buflen,
6068 int flags, int type)
6070 if (strcmp(key, "") != 0)
6073 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6076 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6077 void *buf, size_t buflen, int type)
6079 if (strcmp(key, "") != 0)
6082 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6085 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6086 size_t list_len, const char *name,
6087 size_t name_len, int type)
6089 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6091 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
6094 if (list && len <= list_len)
6095 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
6099 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
6100 static inline int nfs4_server_supports_labels(struct nfs_server *server)
6102 return server->caps & NFS_CAP_SECURITY_LABEL;
6105 static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6106 const void *buf, size_t buflen,
6107 int flags, int type)
6109 if (security_ismaclabel(key))
6110 return nfs4_set_security_label(dentry, buf, buflen);
6115 static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6116 void *buf, size_t buflen, int type)
6118 if (security_ismaclabel(key))
6119 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
6123 static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6124 size_t list_len, const char *name,
6125 size_t name_len, int type)
6129 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
6130 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
6131 if (list && len <= list_len)
6132 security_inode_listsecurity(dentry->d_inode, list, len);
6137 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6138 .prefix = XATTR_SECURITY_PREFIX,
6139 .list = nfs4_xattr_list_nfs4_label,
6140 .get = nfs4_xattr_get_nfs4_label,
6141 .set = nfs4_xattr_set_nfs4_label,
6147 * nfs_fhget will use either the mounted_on_fileid or the fileid
6149 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6151 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6152 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6153 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
6154 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
6157 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
6158 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
6159 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6163 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6164 const struct qstr *name,
6165 struct nfs4_fs_locations *fs_locations,
6168 struct nfs_server *server = NFS_SERVER(dir);
6170 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6172 struct nfs4_fs_locations_arg args = {
6173 .dir_fh = NFS_FH(dir),
6178 struct nfs4_fs_locations_res res = {
6179 .fs_locations = fs_locations,
6181 struct rpc_message msg = {
6182 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6188 dprintk("%s: start\n", __func__);
6190 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6191 * is not supported */
6192 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6193 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6195 bitmask[0] |= FATTR4_WORD0_FILEID;
6197 nfs_fattr_init(&fs_locations->fattr);
6198 fs_locations->server = server;
6199 fs_locations->nlocations = 0;
6200 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
6201 dprintk("%s: returned status = %d\n", __func__, status);
6205 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6206 const struct qstr *name,
6207 struct nfs4_fs_locations *fs_locations,
6210 struct nfs4_exception exception = { };
6213 err = _nfs4_proc_fs_locations(client, dir, name,
6214 fs_locations, page);
6215 trace_nfs4_get_fs_locations(dir, name, err);
6216 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6218 } while (exception.retry);
6223 * This operation also signals the server that this client is
6224 * performing migration recovery. The server can stop returning
6225 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6226 * appended to this compound to identify the client ID which is
6227 * performing recovery.
6229 static int _nfs40_proc_get_locations(struct inode *inode,
6230 struct nfs4_fs_locations *locations,
6231 struct page *page, struct rpc_cred *cred)
6233 struct nfs_server *server = NFS_SERVER(inode);
6234 struct rpc_clnt *clnt = server->client;
6236 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6238 struct nfs4_fs_locations_arg args = {
6239 .clientid = server->nfs_client->cl_clientid,
6240 .fh = NFS_FH(inode),
6243 .migration = 1, /* skip LOOKUP */
6244 .renew = 1, /* append RENEW */
6246 struct nfs4_fs_locations_res res = {
6247 .fs_locations = locations,
6251 struct rpc_message msg = {
6252 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6257 unsigned long now = jiffies;
6260 nfs_fattr_init(&locations->fattr);
6261 locations->server = server;
6262 locations->nlocations = 0;
6264 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6265 nfs4_set_sequence_privileged(&args.seq_args);
6266 status = nfs4_call_sync_sequence(clnt, server, &msg,
6267 &args.seq_args, &res.seq_res);
6271 renew_lease(server, now);
6275 #ifdef CONFIG_NFS_V4_1
6278 * This operation also signals the server that this client is
6279 * performing migration recovery. The server can stop asserting
6280 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6281 * performing this operation is identified in the SEQUENCE
6282 * operation in this compound.
6284 * When the client supports GETATTR(fs_locations_info), it can
6285 * be plumbed in here.
6287 static int _nfs41_proc_get_locations(struct inode *inode,
6288 struct nfs4_fs_locations *locations,
6289 struct page *page, struct rpc_cred *cred)
6291 struct nfs_server *server = NFS_SERVER(inode);
6292 struct rpc_clnt *clnt = server->client;
6294 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6296 struct nfs4_fs_locations_arg args = {
6297 .fh = NFS_FH(inode),
6300 .migration = 1, /* skip LOOKUP */
6302 struct nfs4_fs_locations_res res = {
6303 .fs_locations = locations,
6306 struct rpc_message msg = {
6307 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6314 nfs_fattr_init(&locations->fattr);
6315 locations->server = server;
6316 locations->nlocations = 0;
6318 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6319 nfs4_set_sequence_privileged(&args.seq_args);
6320 status = nfs4_call_sync_sequence(clnt, server, &msg,
6321 &args.seq_args, &res.seq_res);
6322 if (status == NFS4_OK &&
6323 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6324 status = -NFS4ERR_LEASE_MOVED;
6328 #endif /* CONFIG_NFS_V4_1 */
6331 * nfs4_proc_get_locations - discover locations for a migrated FSID
6332 * @inode: inode on FSID that is migrating
6333 * @locations: result of query
6335 * @cred: credential to use for this operation
6337 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6338 * operation failed, or a negative errno if a local error occurred.
6340 * On success, "locations" is filled in, but if the server has
6341 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6344 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6345 * from this client that require migration recovery.
6347 int nfs4_proc_get_locations(struct inode *inode,
6348 struct nfs4_fs_locations *locations,
6349 struct page *page, struct rpc_cred *cred)
6351 struct nfs_server *server = NFS_SERVER(inode);
6352 struct nfs_client *clp = server->nfs_client;
6353 const struct nfs4_mig_recovery_ops *ops =
6354 clp->cl_mvops->mig_recovery_ops;
6355 struct nfs4_exception exception = { };
6358 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6359 (unsigned long long)server->fsid.major,
6360 (unsigned long long)server->fsid.minor,
6362 nfs_display_fhandle(NFS_FH(inode), __func__);
6365 status = ops->get_locations(inode, locations, page, cred);
6366 if (status != -NFS4ERR_DELAY)
6368 nfs4_handle_exception(server, status, &exception);
6369 } while (exception.retry);
6374 * This operation also signals the server that this client is
6375 * performing "lease moved" recovery. The server can stop
6376 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6377 * is appended to this compound to identify the client ID which is
6378 * performing recovery.
6380 static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6382 struct nfs_server *server = NFS_SERVER(inode);
6383 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6384 struct rpc_clnt *clnt = server->client;
6385 struct nfs4_fsid_present_arg args = {
6386 .fh = NFS_FH(inode),
6387 .clientid = clp->cl_clientid,
6388 .renew = 1, /* append RENEW */
6390 struct nfs4_fsid_present_res res = {
6393 struct rpc_message msg = {
6394 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6399 unsigned long now = jiffies;
6402 res.fh = nfs_alloc_fhandle();
6406 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6407 nfs4_set_sequence_privileged(&args.seq_args);
6408 status = nfs4_call_sync_sequence(clnt, server, &msg,
6409 &args.seq_args, &res.seq_res);
6410 nfs_free_fhandle(res.fh);
6414 do_renew_lease(clp, now);
6418 #ifdef CONFIG_NFS_V4_1
6421 * This operation also signals the server that this client is
6422 * performing "lease moved" recovery. The server can stop asserting
6423 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6424 * this operation is identified in the SEQUENCE operation in this
6427 static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6429 struct nfs_server *server = NFS_SERVER(inode);
6430 struct rpc_clnt *clnt = server->client;
6431 struct nfs4_fsid_present_arg args = {
6432 .fh = NFS_FH(inode),
6434 struct nfs4_fsid_present_res res = {
6436 struct rpc_message msg = {
6437 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6444 res.fh = nfs_alloc_fhandle();
6448 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6449 nfs4_set_sequence_privileged(&args.seq_args);
6450 status = nfs4_call_sync_sequence(clnt, server, &msg,
6451 &args.seq_args, &res.seq_res);
6452 nfs_free_fhandle(res.fh);
6453 if (status == NFS4_OK &&
6454 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6455 status = -NFS4ERR_LEASE_MOVED;
6459 #endif /* CONFIG_NFS_V4_1 */
6462 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6463 * @inode: inode on FSID to check
6464 * @cred: credential to use for this operation
6466 * Server indicates whether the FSID is present, moved, or not
6467 * recognized. This operation is necessary to clear a LEASE_MOVED
6468 * condition for this client ID.
6470 * Returns NFS4_OK if the FSID is present on this server,
6471 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6472 * NFS4ERR code if some error occurred on the server, or a
6473 * negative errno if a local failure occurred.
6475 int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6477 struct nfs_server *server = NFS_SERVER(inode);
6478 struct nfs_client *clp = server->nfs_client;
6479 const struct nfs4_mig_recovery_ops *ops =
6480 clp->cl_mvops->mig_recovery_ops;
6481 struct nfs4_exception exception = { };
6484 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6485 (unsigned long long)server->fsid.major,
6486 (unsigned long long)server->fsid.minor,
6488 nfs_display_fhandle(NFS_FH(inode), __func__);
6491 status = ops->fsid_present(inode, cred);
6492 if (status != -NFS4ERR_DELAY)
6494 nfs4_handle_exception(server, status, &exception);
6495 } while (exception.retry);
6500 * If 'use_integrity' is true and the state managment nfs_client
6501 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6502 * and the machine credential as per RFC3530bis and RFC5661 Security
6503 * Considerations sections. Otherwise, just use the user cred with the
6504 * filesystem's rpc_client.
6506 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
6509 struct nfs4_secinfo_arg args = {
6510 .dir_fh = NFS_FH(dir),
6513 struct nfs4_secinfo_res res = {
6516 struct rpc_message msg = {
6517 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6521 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
6522 struct rpc_cred *cred = NULL;
6524 if (use_integrity) {
6525 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
6526 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6527 msg.rpc_cred = cred;
6530 dprintk("NFS call secinfo %s\n", name->name);
6532 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6533 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6535 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6537 dprintk("NFS reply secinfo: %d\n", status);
6545 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6546 struct nfs4_secinfo_flavors *flavors)
6548 struct nfs4_exception exception = { };
6551 err = -NFS4ERR_WRONGSEC;
6553 /* try to use integrity protection with machine cred */
6554 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6555 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6558 * if unable to use integrity protection, or SECINFO with
6559 * integrity protection returns NFS4ERR_WRONGSEC (which is
6560 * disallowed by spec, but exists in deployed servers) use
6561 * the current filesystem's rpc_client and the user cred.
6563 if (err == -NFS4ERR_WRONGSEC)
6564 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6566 trace_nfs4_secinfo(dir, name, err);
6567 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6569 } while (exception.retry);
6573 #ifdef CONFIG_NFS_V4_1
6575 * Check the exchange flags returned by the server for invalid flags, having
6576 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6579 static int nfs4_check_cl_exchange_flags(u32 flags)
6581 if (flags & ~EXCHGID4_FLAG_MASK_R)
6583 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6584 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6586 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6590 return -NFS4ERR_INVAL;
6594 nfs41_same_server_scope(struct nfs41_server_scope *a,
6595 struct nfs41_server_scope *b)
6597 if (a->server_scope_sz == b->server_scope_sz &&
6598 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6605 * nfs4_proc_bind_conn_to_session()
6607 * The 4.1 client currently uses the same TCP connection for the
6608 * fore and backchannel.
6610 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
6613 struct nfs41_bind_conn_to_session_res res;
6614 struct rpc_message msg = {
6616 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6622 dprintk("--> %s\n", __func__);
6624 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
6625 if (unlikely(res.session == NULL)) {
6630 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6631 trace_nfs4_bind_conn_to_session(clp, status);
6633 if (memcmp(res.session->sess_id.data,
6634 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6635 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6639 if (res.dir != NFS4_CDFS4_BOTH) {
6640 dprintk("NFS: %s: Unexpected direction from server\n",
6645 if (res.use_conn_in_rdma_mode) {
6646 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6655 dprintk("<-- %s status= %d\n", __func__, status);
6660 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6661 * and operations we'd like to see to enable certain features in the allow map
6663 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6664 .how = SP4_MACH_CRED,
6665 .enforce.u.words = {
6666 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6667 1 << (OP_EXCHANGE_ID - 32) |
6668 1 << (OP_CREATE_SESSION - 32) |
6669 1 << (OP_DESTROY_SESSION - 32) |
6670 1 << (OP_DESTROY_CLIENTID - 32)
6673 [0] = 1 << (OP_CLOSE) |
6676 [1] = 1 << (OP_SECINFO - 32) |
6677 1 << (OP_SECINFO_NO_NAME - 32) |
6678 1 << (OP_TEST_STATEID - 32) |
6679 1 << (OP_FREE_STATEID - 32) |
6680 1 << (OP_WRITE - 32)
6685 * Select the state protection mode for client `clp' given the server results
6686 * from exchange_id in `sp'.
6688 * Returns 0 on success, negative errno otherwise.
6690 static int nfs4_sp4_select_mode(struct nfs_client *clp,
6691 struct nfs41_state_protection *sp)
6693 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6694 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6695 1 << (OP_EXCHANGE_ID - 32) |
6696 1 << (OP_CREATE_SESSION - 32) |
6697 1 << (OP_DESTROY_SESSION - 32) |
6698 1 << (OP_DESTROY_CLIENTID - 32)
6702 if (sp->how == SP4_MACH_CRED) {
6703 /* Print state protect result */
6704 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6705 for (i = 0; i <= LAST_NFS4_OP; i++) {
6706 if (test_bit(i, sp->enforce.u.longs))
6707 dfprintk(MOUNT, " enforce op %d\n", i);
6708 if (test_bit(i, sp->allow.u.longs))
6709 dfprintk(MOUNT, " allow op %d\n", i);
6712 /* make sure nothing is on enforce list that isn't supported */
6713 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6714 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6715 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6721 * Minimal mode - state operations are allowed to use machine
6722 * credential. Note this already happens by default, so the
6723 * client doesn't have to do anything more than the negotiation.
6725 * NOTE: we don't care if EXCHANGE_ID is in the list -
6726 * we're already using the machine cred for exchange_id
6727 * and will never use a different cred.
6729 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6730 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6731 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6732 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6733 dfprintk(MOUNT, "sp4_mach_cred:\n");
6734 dfprintk(MOUNT, " minimal mode enabled\n");
6735 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6737 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6741 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6742 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6743 dfprintk(MOUNT, " cleanup mode enabled\n");
6744 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6747 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6748 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6749 dfprintk(MOUNT, " secinfo mode enabled\n");
6750 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6753 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6754 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6755 dfprintk(MOUNT, " stateid mode enabled\n");
6756 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6759 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6760 dfprintk(MOUNT, " write mode enabled\n");
6761 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6764 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6765 dfprintk(MOUNT, " commit mode enabled\n");
6766 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6774 * _nfs4_proc_exchange_id()
6776 * Wrapper for EXCHANGE_ID operation.
6778 static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6781 nfs4_verifier verifier;
6782 struct nfs41_exchange_id_args args = {
6783 .verifier = &verifier,
6785 #ifdef CONFIG_NFS_V4_1_MIGRATION
6786 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6787 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6788 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6790 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6791 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6794 struct nfs41_exchange_id_res res = {
6798 struct rpc_message msg = {
6799 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6805 nfs4_init_boot_verifier(clp, &verifier);
6806 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6808 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6809 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6810 args.id_len, args.id);
6812 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
6814 if (unlikely(res.server_owner == NULL)) {
6819 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
6821 if (unlikely(res.server_scope == NULL)) {
6823 goto out_server_owner;
6826 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
6827 if (unlikely(res.impl_id == NULL)) {
6829 goto out_server_scope;
6834 args.state_protect.how = SP4_NONE;
6838 args.state_protect = nfs4_sp4_mach_cred_request;
6845 goto out_server_scope;
6848 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6849 trace_nfs4_exchange_id(clp, status);
6851 status = nfs4_check_cl_exchange_flags(res.flags);
6854 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6857 clp->cl_clientid = res.clientid;
6858 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6859 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6860 clp->cl_seqid = res.seqid;
6862 kfree(clp->cl_serverowner);
6863 clp->cl_serverowner = res.server_owner;
6864 res.server_owner = NULL;
6866 /* use the most recent implementation id */
6867 kfree(clp->cl_implid);
6868 clp->cl_implid = res.impl_id;
6870 if (clp->cl_serverscope != NULL &&
6871 !nfs41_same_server_scope(clp->cl_serverscope,
6872 res.server_scope)) {
6873 dprintk("%s: server_scope mismatch detected\n",
6875 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
6876 kfree(clp->cl_serverscope);
6877 clp->cl_serverscope = NULL;
6880 if (clp->cl_serverscope == NULL) {
6881 clp->cl_serverscope = res.server_scope;
6888 kfree(res.server_owner);
6890 kfree(res.server_scope);
6892 if (clp->cl_implid != NULL)
6893 dprintk("NFS reply exchange_id: Server Implementation ID: "
6894 "domain: %s, name: %s, date: %llu,%u\n",
6895 clp->cl_implid->domain, clp->cl_implid->name,
6896 clp->cl_implid->date.seconds,
6897 clp->cl_implid->date.nseconds);
6898 dprintk("NFS reply exchange_id: %d\n", status);
6903 * nfs4_proc_exchange_id()
6905 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6907 * Since the clientid has expired, all compounds using sessions
6908 * associated with the stale clientid will be returning
6909 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6910 * be in some phase of session reset.
6912 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6914 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6916 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6919 /* try SP4_MACH_CRED if krb5i/p */
6920 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6921 authflavor == RPC_AUTH_GSS_KRB5P) {
6922 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6928 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6931 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6932 struct rpc_cred *cred)
6934 struct rpc_message msg = {
6935 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6941 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6942 trace_nfs4_destroy_clientid(clp, status);
6944 dprintk("NFS: Got error %d from the server %s on "
6945 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6949 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6950 struct rpc_cred *cred)
6955 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6956 ret = _nfs4_proc_destroy_clientid(clp, cred);
6958 case -NFS4ERR_DELAY:
6959 case -NFS4ERR_CLIENTID_BUSY:
6969 int nfs4_destroy_clientid(struct nfs_client *clp)
6971 struct rpc_cred *cred;
6974 if (clp->cl_mvops->minor_version < 1)
6976 if (clp->cl_exchange_flags == 0)
6978 if (clp->cl_preserve_clid)
6980 cred = nfs4_get_clid_cred(clp);
6981 ret = nfs4_proc_destroy_clientid(clp, cred);
6986 case -NFS4ERR_STALE_CLIENTID:
6987 clp->cl_exchange_flags = 0;
6993 struct nfs4_get_lease_time_data {
6994 struct nfs4_get_lease_time_args *args;
6995 struct nfs4_get_lease_time_res *res;
6996 struct nfs_client *clp;
6999 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7002 struct nfs4_get_lease_time_data *data =
7003 (struct nfs4_get_lease_time_data *)calldata;
7005 dprintk("--> %s\n", __func__);
7006 /* just setup sequence, do not trigger session recovery
7007 since we're invoked within one */
7008 nfs41_setup_sequence(data->clp->cl_session,
7009 &data->args->la_seq_args,
7010 &data->res->lr_seq_res,
7012 dprintk("<-- %s\n", __func__);
7016 * Called from nfs4_state_manager thread for session setup, so don't recover
7017 * from sequence operation or clientid errors.
7019 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7021 struct nfs4_get_lease_time_data *data =
7022 (struct nfs4_get_lease_time_data *)calldata;
7024 dprintk("--> %s\n", __func__);
7025 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7027 switch (task->tk_status) {
7028 case -NFS4ERR_DELAY:
7029 case -NFS4ERR_GRACE:
7030 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7031 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7032 task->tk_status = 0;
7034 case -NFS4ERR_RETRY_UNCACHED_REP:
7035 rpc_restart_call_prepare(task);
7038 dprintk("<-- %s\n", __func__);
7041 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
7042 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7043 .rpc_call_done = nfs4_get_lease_time_done,
7046 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7048 struct rpc_task *task;
7049 struct nfs4_get_lease_time_args args;
7050 struct nfs4_get_lease_time_res res = {
7051 .lr_fsinfo = fsinfo,
7053 struct nfs4_get_lease_time_data data = {
7058 struct rpc_message msg = {
7059 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7063 struct rpc_task_setup task_setup = {
7064 .rpc_client = clp->cl_rpcclient,
7065 .rpc_message = &msg,
7066 .callback_ops = &nfs4_get_lease_time_ops,
7067 .callback_data = &data,
7068 .flags = RPC_TASK_TIMEOUT,
7072 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
7073 nfs4_set_sequence_privileged(&args.la_seq_args);
7074 dprintk("--> %s\n", __func__);
7075 task = rpc_run_task(&task_setup);
7078 status = PTR_ERR(task);
7080 status = task->tk_status;
7083 dprintk("<-- %s return %d\n", __func__, status);
7089 * Initialize the values to be used by the client in CREATE_SESSION
7090 * If nfs4_init_session set the fore channel request and response sizes,
7093 * Set the back channel max_resp_sz_cached to zero to force the client to
7094 * always set csa_cachethis to FALSE because the current implementation
7095 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7097 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7099 unsigned int max_rqst_sz, max_resp_sz;
7101 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7102 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
7104 /* Fore channel attributes */
7105 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7106 args->fc_attrs.max_resp_sz = max_resp_sz;
7107 args->fc_attrs.max_ops = NFS4_MAX_OPS;
7108 args->fc_attrs.max_reqs = max_session_slots;
7110 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
7111 "max_ops=%u max_reqs=%u\n",
7113 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
7114 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
7116 /* Back channel attributes */
7117 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7118 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7119 args->bc_attrs.max_resp_sz_cached = 0;
7120 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7121 args->bc_attrs.max_reqs = 1;
7123 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7124 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7126 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7127 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7128 args->bc_attrs.max_reqs);
7131 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
7133 struct nfs4_channel_attrs *sent = &args->fc_attrs;
7134 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
7136 if (rcvd->max_resp_sz > sent->max_resp_sz)
7139 * Our requested max_ops is the minimum we need; we're not
7140 * prepared to break up compounds into smaller pieces than that.
7141 * So, no point even trying to continue if the server won't
7144 if (rcvd->max_ops < sent->max_ops)
7146 if (rcvd->max_reqs == 0)
7148 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7149 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
7153 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
7155 struct nfs4_channel_attrs *sent = &args->bc_attrs;
7156 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
7158 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7160 if (rcvd->max_resp_sz < sent->max_resp_sz)
7162 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7164 /* These would render the backchannel useless: */
7165 if (rcvd->max_ops != sent->max_ops)
7167 if (rcvd->max_reqs != sent->max_reqs)
7172 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7173 struct nfs4_session *session)
7177 ret = nfs4_verify_fore_channel_attrs(args, session);
7180 return nfs4_verify_back_channel_attrs(args, session);
7183 static int _nfs4_proc_create_session(struct nfs_client *clp,
7184 struct rpc_cred *cred)
7186 struct nfs4_session *session = clp->cl_session;
7187 struct nfs41_create_session_args args = {
7189 .cb_program = NFS4_CALLBACK,
7191 struct nfs41_create_session_res res = {
7194 struct rpc_message msg = {
7195 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7202 nfs4_init_channel_attrs(&args);
7203 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
7205 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7206 trace_nfs4_create_session(clp, status);
7209 /* Verify the session's negotiated channel_attrs values */
7210 status = nfs4_verify_channel_attrs(&args, session);
7211 /* Increment the clientid slot sequence id */
7219 * Issues a CREATE_SESSION operation to the server.
7220 * It is the responsibility of the caller to verify the session is
7221 * expired before calling this routine.
7223 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
7227 struct nfs4_session *session = clp->cl_session;
7229 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7231 status = _nfs4_proc_create_session(clp, cred);
7235 /* Init or reset the session slot tables */
7236 status = nfs4_setup_session_slot_tables(session);
7237 dprintk("slot table setup returned %d\n", status);
7241 ptr = (unsigned *)&session->sess_id.data[0];
7242 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7243 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
7245 dprintk("<-- %s\n", __func__);
7250 * Issue the over-the-wire RPC DESTROY_SESSION.
7251 * The caller must serialize access to this routine.
7253 int nfs4_proc_destroy_session(struct nfs4_session *session,
7254 struct rpc_cred *cred)
7256 struct rpc_message msg = {
7257 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7258 .rpc_argp = session,
7263 dprintk("--> nfs4_proc_destroy_session\n");
7265 /* session is still being setup */
7266 if (session->clp->cl_cons_state != NFS_CS_READY)
7269 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7270 trace_nfs4_destroy_session(session->clp, status);
7273 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
7274 "Session has been destroyed regardless...\n", status);
7276 dprintk("<-- nfs4_proc_destroy_session\n");
7281 * Renew the cl_session lease.
7283 struct nfs4_sequence_data {
7284 struct nfs_client *clp;
7285 struct nfs4_sequence_args args;
7286 struct nfs4_sequence_res res;
7289 static void nfs41_sequence_release(void *data)
7291 struct nfs4_sequence_data *calldata = data;
7292 struct nfs_client *clp = calldata->clp;
7294 if (atomic_read(&clp->cl_count) > 1)
7295 nfs4_schedule_state_renewal(clp);
7296 nfs_put_client(clp);
7300 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7302 switch(task->tk_status) {
7303 case -NFS4ERR_DELAY:
7304 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7307 nfs4_schedule_lease_recovery(clp);
7312 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
7314 struct nfs4_sequence_data *calldata = data;
7315 struct nfs_client *clp = calldata->clp;
7317 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7320 trace_nfs4_sequence(clp, task->tk_status);
7321 if (task->tk_status < 0) {
7322 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7323 if (atomic_read(&clp->cl_count) == 1)
7326 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7327 rpc_restart_call_prepare(task);
7331 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7333 dprintk("<-- %s\n", __func__);
7336 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7338 struct nfs4_sequence_data *calldata = data;
7339 struct nfs_client *clp = calldata->clp;
7340 struct nfs4_sequence_args *args;
7341 struct nfs4_sequence_res *res;
7343 args = task->tk_msg.rpc_argp;
7344 res = task->tk_msg.rpc_resp;
7346 nfs41_setup_sequence(clp->cl_session, args, res, task);
7349 static const struct rpc_call_ops nfs41_sequence_ops = {
7350 .rpc_call_done = nfs41_sequence_call_done,
7351 .rpc_call_prepare = nfs41_sequence_prepare,
7352 .rpc_release = nfs41_sequence_release,
7355 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7356 struct rpc_cred *cred,
7359 struct nfs4_sequence_data *calldata;
7360 struct rpc_message msg = {
7361 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7364 struct rpc_task_setup task_setup_data = {
7365 .rpc_client = clp->cl_rpcclient,
7366 .rpc_message = &msg,
7367 .callback_ops = &nfs41_sequence_ops,
7368 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
7371 if (!atomic_inc_not_zero(&clp->cl_count))
7372 return ERR_PTR(-EIO);
7373 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7374 if (calldata == NULL) {
7375 nfs_put_client(clp);
7376 return ERR_PTR(-ENOMEM);
7378 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
7380 nfs4_set_sequence_privileged(&calldata->args);
7381 msg.rpc_argp = &calldata->args;
7382 msg.rpc_resp = &calldata->res;
7383 calldata->clp = clp;
7384 task_setup_data.callback_data = calldata;
7386 return rpc_run_task(&task_setup_data);
7389 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
7391 struct rpc_task *task;
7394 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
7396 task = _nfs41_proc_sequence(clp, cred, false);
7398 ret = PTR_ERR(task);
7400 rpc_put_task_async(task);
7401 dprintk("<-- %s status=%d\n", __func__, ret);
7405 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7407 struct rpc_task *task;
7410 task = _nfs41_proc_sequence(clp, cred, true);
7412 ret = PTR_ERR(task);
7415 ret = rpc_wait_for_completion_task(task);
7417 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7419 if (task->tk_status == 0)
7420 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
7421 ret = task->tk_status;
7425 dprintk("<-- %s status=%d\n", __func__, ret);
7429 struct nfs4_reclaim_complete_data {
7430 struct nfs_client *clp;
7431 struct nfs41_reclaim_complete_args arg;
7432 struct nfs41_reclaim_complete_res res;
7435 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7437 struct nfs4_reclaim_complete_data *calldata = data;
7439 nfs41_setup_sequence(calldata->clp->cl_session,
7440 &calldata->arg.seq_args,
7441 &calldata->res.seq_res,
7445 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7447 switch(task->tk_status) {
7449 case -NFS4ERR_COMPLETE_ALREADY:
7450 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7452 case -NFS4ERR_DELAY:
7453 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7455 case -NFS4ERR_RETRY_UNCACHED_REP:
7458 nfs4_schedule_lease_recovery(clp);
7463 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7465 struct nfs4_reclaim_complete_data *calldata = data;
7466 struct nfs_client *clp = calldata->clp;
7467 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7469 dprintk("--> %s\n", __func__);
7470 if (!nfs41_sequence_done(task, res))
7473 trace_nfs4_reclaim_complete(clp, task->tk_status);
7474 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7475 rpc_restart_call_prepare(task);
7478 dprintk("<-- %s\n", __func__);
7481 static void nfs4_free_reclaim_complete_data(void *data)
7483 struct nfs4_reclaim_complete_data *calldata = data;
7488 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7489 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7490 .rpc_call_done = nfs4_reclaim_complete_done,
7491 .rpc_release = nfs4_free_reclaim_complete_data,
7495 * Issue a global reclaim complete.
7497 static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7498 struct rpc_cred *cred)
7500 struct nfs4_reclaim_complete_data *calldata;
7501 struct rpc_task *task;
7502 struct rpc_message msg = {
7503 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
7506 struct rpc_task_setup task_setup_data = {
7507 .rpc_client = clp->cl_rpcclient,
7508 .rpc_message = &msg,
7509 .callback_ops = &nfs4_reclaim_complete_call_ops,
7510 .flags = RPC_TASK_ASYNC,
7512 int status = -ENOMEM;
7514 dprintk("--> %s\n", __func__);
7515 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7516 if (calldata == NULL)
7518 calldata->clp = clp;
7519 calldata->arg.one_fs = 0;
7521 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
7522 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
7523 msg.rpc_argp = &calldata->arg;
7524 msg.rpc_resp = &calldata->res;
7525 task_setup_data.callback_data = calldata;
7526 task = rpc_run_task(&task_setup_data);
7528 status = PTR_ERR(task);
7531 status = nfs4_wait_for_completion_rpc_task(task);
7533 status = task->tk_status;
7537 dprintk("<-- %s status=%d\n", __func__, status);
7542 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7544 struct nfs4_layoutget *lgp = calldata;
7545 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
7546 struct nfs4_session *session = nfs4_get_session(server);
7548 dprintk("--> %s\n", __func__);
7549 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7550 * right now covering the LAYOUTGET we are about to send.
7551 * However, that is not so catastrophic, and there seems
7552 * to be no way to prevent it completely.
7554 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
7555 &lgp->res.seq_res, task))
7557 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7558 NFS_I(lgp->args.inode)->layout,
7559 lgp->args.ctx->state)) {
7560 rpc_exit(task, NFS4_OK);
7564 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7566 struct nfs4_layoutget *lgp = calldata;
7567 struct inode *inode = lgp->args.inode;
7568 struct nfs_server *server = NFS_SERVER(inode);
7569 struct pnfs_layout_hdr *lo;
7570 struct nfs4_state *state = NULL;
7571 unsigned long timeo, now, giveup;
7573 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
7575 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
7578 switch (task->tk_status) {
7582 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7583 * (or clients) writing to the same RAID stripe
7585 case -NFS4ERR_LAYOUTTRYLATER:
7587 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7588 * existing layout before getting a new one).
7590 case -NFS4ERR_RECALLCONFLICT:
7591 timeo = rpc_get_timeout(task->tk_client);
7592 giveup = lgp->args.timestamp + timeo;
7594 if (time_after(giveup, now)) {
7595 unsigned long delay;
7598 * - Not less then NFS4_POLL_RETRY_MIN.
7599 * - One last time a jiffie before we give up
7600 * - exponential backoff (time_now minus start_attempt)
7602 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7603 min((giveup - now - 1),
7604 now - lgp->args.timestamp));
7606 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7608 rpc_delay(task, delay);
7609 task->tk_status = 0;
7610 rpc_restart_call_prepare(task);
7611 goto out; /* Do not call nfs4_async_handle_error() */
7614 case -NFS4ERR_EXPIRED:
7615 case -NFS4ERR_BAD_STATEID:
7616 spin_lock(&inode->i_lock);
7617 lo = NFS_I(inode)->layout;
7618 if (!lo || list_empty(&lo->plh_segs)) {
7619 spin_unlock(&inode->i_lock);
7620 /* If the open stateid was bad, then recover it. */
7621 state = lgp->args.ctx->state;
7626 * Mark the bad layout state as invalid, then retry
7627 * with the current stateid.
7629 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7630 spin_unlock(&inode->i_lock);
7631 pnfs_free_lseg_list(&head);
7633 task->tk_status = 0;
7634 rpc_restart_call_prepare(task);
7637 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN)
7638 rpc_restart_call_prepare(task);
7640 dprintk("<-- %s\n", __func__);
7643 static size_t max_response_pages(struct nfs_server *server)
7645 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7646 return nfs_page_array_len(0, max_resp_sz);
7649 static void nfs4_free_pages(struct page **pages, size_t size)
7656 for (i = 0; i < size; i++) {
7659 __free_page(pages[i]);
7664 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7666 struct page **pages;
7669 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7671 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7675 for (i = 0; i < size; i++) {
7676 pages[i] = alloc_page(gfp_flags);
7678 dprintk("%s: failed to allocate page\n", __func__);
7679 nfs4_free_pages(pages, size);
7687 static void nfs4_layoutget_release(void *calldata)
7689 struct nfs4_layoutget *lgp = calldata;
7690 struct inode *inode = lgp->args.inode;
7691 struct nfs_server *server = NFS_SERVER(inode);
7692 size_t max_pages = max_response_pages(server);
7694 dprintk("--> %s\n", __func__);
7695 nfs4_free_pages(lgp->args.layout.pages, max_pages);
7696 pnfs_put_layout_hdr(NFS_I(inode)->layout);
7697 put_nfs_open_context(lgp->args.ctx);
7699 dprintk("<-- %s\n", __func__);
7702 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7703 .rpc_call_prepare = nfs4_layoutget_prepare,
7704 .rpc_call_done = nfs4_layoutget_done,
7705 .rpc_release = nfs4_layoutget_release,
7708 struct pnfs_layout_segment *
7709 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
7711 struct inode *inode = lgp->args.inode;
7712 struct nfs_server *server = NFS_SERVER(inode);
7713 size_t max_pages = max_response_pages(server);
7714 struct rpc_task *task;
7715 struct rpc_message msg = {
7716 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7717 .rpc_argp = &lgp->args,
7718 .rpc_resp = &lgp->res,
7719 .rpc_cred = lgp->cred,
7721 struct rpc_task_setup task_setup_data = {
7722 .rpc_client = server->client,
7723 .rpc_message = &msg,
7724 .callback_ops = &nfs4_layoutget_call_ops,
7725 .callback_data = lgp,
7726 .flags = RPC_TASK_ASYNC,
7728 struct pnfs_layout_segment *lseg = NULL;
7731 dprintk("--> %s\n", __func__);
7733 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7734 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7736 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7737 if (!lgp->args.layout.pages) {
7738 nfs4_layoutget_release(lgp);
7739 return ERR_PTR(-ENOMEM);
7741 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
7742 lgp->args.timestamp = jiffies;
7744 lgp->res.layoutp = &lgp->args.layout;
7745 lgp->res.seq_res.sr_slot = NULL;
7746 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
7748 task = rpc_run_task(&task_setup_data);
7750 return ERR_CAST(task);
7751 status = nfs4_wait_for_completion_rpc_task(task);
7753 status = task->tk_status;
7754 trace_nfs4_layoutget(lgp->args.ctx,
7758 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7759 if (status == 0 && lgp->res.layoutp->len)
7760 lseg = pnfs_layout_process(lgp);
7762 dprintk("<-- %s status=%d\n", __func__, status);
7764 return ERR_PTR(status);
7769 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7771 struct nfs4_layoutreturn *lrp = calldata;
7773 dprintk("--> %s\n", __func__);
7774 nfs41_setup_sequence(lrp->clp->cl_session,
7775 &lrp->args.seq_args,
7780 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7782 struct nfs4_layoutreturn *lrp = calldata;
7783 struct nfs_server *server;
7785 dprintk("--> %s\n", __func__);
7787 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
7790 server = NFS_SERVER(lrp->args.inode);
7791 switch (task->tk_status) {
7793 task->tk_status = 0;
7796 case -NFS4ERR_DELAY:
7797 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
7799 rpc_restart_call_prepare(task);
7802 dprintk("<-- %s\n", __func__);
7805 static void nfs4_layoutreturn_release(void *calldata)
7807 struct nfs4_layoutreturn *lrp = calldata;
7808 struct pnfs_layout_hdr *lo = lrp->args.layout;
7810 dprintk("--> %s\n", __func__);
7811 spin_lock(&lo->plh_inode->i_lock);
7812 if (lrp->res.lrs_present)
7813 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7814 lo->plh_block_lgets--;
7815 spin_unlock(&lo->plh_inode->i_lock);
7816 pnfs_put_layout_hdr(lrp->args.layout);
7818 dprintk("<-- %s\n", __func__);
7821 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7822 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7823 .rpc_call_done = nfs4_layoutreturn_done,
7824 .rpc_release = nfs4_layoutreturn_release,
7827 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
7829 struct rpc_task *task;
7830 struct rpc_message msg = {
7831 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7832 .rpc_argp = &lrp->args,
7833 .rpc_resp = &lrp->res,
7834 .rpc_cred = lrp->cred,
7836 struct rpc_task_setup task_setup_data = {
7837 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
7838 .rpc_message = &msg,
7839 .callback_ops = &nfs4_layoutreturn_call_ops,
7840 .callback_data = lrp,
7844 dprintk("--> %s\n", __func__);
7845 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
7846 task = rpc_run_task(&task_setup_data);
7848 return PTR_ERR(task);
7849 status = task->tk_status;
7850 trace_nfs4_layoutreturn(lrp->args.inode, status);
7851 dprintk("<-- %s status=%d\n", __func__, status);
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, 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, 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 = nfs40_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
8456 | NFS_CAP_DEALLOCATE
8458 .init_client = nfs41_init_client,
8459 .shutdown_client = nfs41_shutdown_client,
8460 .match_stateid = nfs41_match_stateid,
8461 .find_root_sec = nfs41_find_root_sec,
8462 .free_lock_state = nfs41_free_lock_state,
8463 .call_sync_ops = &nfs41_call_sync_ops,
8464 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8465 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8466 .state_renewal_ops = &nfs41_state_renewal_ops,
8470 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8471 [0] = &nfs_v4_0_minor_ops,
8472 #if defined(CONFIG_NFS_V4_1)
8473 [1] = &nfs_v4_1_minor_ops,
8475 #if defined(CONFIG_NFS_V4_2)
8476 [2] = &nfs_v4_2_minor_ops,
8480 static const struct inode_operations nfs4_dir_inode_operations = {
8481 .create = nfs_create,
8482 .lookup = nfs_lookup,
8483 .atomic_open = nfs_atomic_open,
8485 .unlink = nfs_unlink,
8486 .symlink = nfs_symlink,
8490 .rename = nfs_rename,
8491 .permission = nfs_permission,
8492 .getattr = nfs_getattr,
8493 .setattr = nfs_setattr,
8494 .getxattr = generic_getxattr,
8495 .setxattr = generic_setxattr,
8496 .listxattr = generic_listxattr,
8497 .removexattr = generic_removexattr,
8500 static const struct inode_operations nfs4_file_inode_operations = {
8501 .permission = nfs_permission,
8502 .getattr = nfs_getattr,
8503 .setattr = nfs_setattr,
8504 .getxattr = generic_getxattr,
8505 .setxattr = generic_setxattr,
8506 .listxattr = generic_listxattr,
8507 .removexattr = generic_removexattr,
8510 const struct nfs_rpc_ops nfs_v4_clientops = {
8511 .version = 4, /* protocol version */
8512 .dentry_ops = &nfs4_dentry_operations,
8513 .dir_inode_ops = &nfs4_dir_inode_operations,
8514 .file_inode_ops = &nfs4_file_inode_operations,
8515 .file_ops = &nfs4_file_operations,
8516 .getroot = nfs4_proc_get_root,
8517 .submount = nfs4_submount,
8518 .try_mount = nfs4_try_mount,
8519 .getattr = nfs4_proc_getattr,
8520 .setattr = nfs4_proc_setattr,
8521 .lookup = nfs4_proc_lookup,
8522 .access = nfs4_proc_access,
8523 .readlink = nfs4_proc_readlink,
8524 .create = nfs4_proc_create,
8525 .remove = nfs4_proc_remove,
8526 .unlink_setup = nfs4_proc_unlink_setup,
8527 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
8528 .unlink_done = nfs4_proc_unlink_done,
8529 .rename_setup = nfs4_proc_rename_setup,
8530 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
8531 .rename_done = nfs4_proc_rename_done,
8532 .link = nfs4_proc_link,
8533 .symlink = nfs4_proc_symlink,
8534 .mkdir = nfs4_proc_mkdir,
8535 .rmdir = nfs4_proc_remove,
8536 .readdir = nfs4_proc_readdir,
8537 .mknod = nfs4_proc_mknod,
8538 .statfs = nfs4_proc_statfs,
8539 .fsinfo = nfs4_proc_fsinfo,
8540 .pathconf = nfs4_proc_pathconf,
8541 .set_capabilities = nfs4_server_capabilities,
8542 .decode_dirent = nfs4_decode_dirent,
8543 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
8544 .read_setup = nfs4_proc_read_setup,
8545 .read_done = nfs4_read_done,
8546 .write_setup = nfs4_proc_write_setup,
8547 .write_done = nfs4_write_done,
8548 .commit_setup = nfs4_proc_commit_setup,
8549 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
8550 .commit_done = nfs4_commit_done,
8551 .lock = nfs4_proc_lock,
8552 .clear_acl_cache = nfs4_zap_acl_attr,
8553 .close_context = nfs4_close_context,
8554 .open_context = nfs4_atomic_open,
8555 .have_delegation = nfs4_have_delegation,
8556 .return_delegation = nfs4_inode_return_delegation,
8557 .alloc_client = nfs4_alloc_client,
8558 .init_client = nfs4_init_client,
8559 .free_client = nfs4_free_client,
8560 .create_server = nfs4_create_server,
8561 .clone_server = nfs_clone_server,
8564 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8565 .prefix = XATTR_NAME_NFSV4_ACL,
8566 .list = nfs4_xattr_list_nfs4_acl,
8567 .get = nfs4_xattr_get_nfs4_acl,
8568 .set = nfs4_xattr_set_nfs4_acl,
8571 const struct xattr_handler *nfs4_xattr_handlers[] = {
8572 &nfs4_xattr_nfs4_acl_handler,
8573 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
8574 &nfs4_xattr_nfs4_label_handler,