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/file.h>
42 #include <linux/string.h>
43 #include <linux/ratelimit.h>
44 #include <linux/printk.h>
45 #include <linux/slab.h>
46 #include <linux/sunrpc/clnt.h>
47 #include <linux/nfs.h>
48 #include <linux/nfs4.h>
49 #include <linux/nfs_fs.h>
50 #include <linux/nfs_page.h>
51 #include <linux/nfs_mount.h>
52 #include <linux/namei.h>
53 #include <linux/mount.h>
54 #include <linux/module.h>
55 #include <linux/xattr.h>
56 #include <linux/utsname.h>
57 #include <linux/freezer.h>
60 #include "delegation.h"
66 #include "nfs4idmap.h"
67 #include "nfs4session.h"
70 #include "nfs4trace.h"
72 #define NFSDBG_FACILITY NFSDBG_PROC
74 #define NFS4_POLL_RETRY_MIN (HZ/10)
75 #define NFS4_POLL_RETRY_MAX (15*HZ)
77 /* file attributes which can be mapped to nfs attributes */
78 #define NFS4_VALID_ATTRS (ATTR_MODE \
89 static int _nfs4_proc_open(struct nfs4_opendata *data);
90 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
91 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
92 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
93 static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
94 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
95 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
96 struct nfs_fattr *fattr, struct iattr *sattr,
97 struct nfs4_state *state, struct nfs4_label *ilabel,
98 struct nfs4_label *olabel);
99 #ifdef CONFIG_NFS_V4_1
100 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
102 static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *,
103 struct rpc_cred *, bool);
106 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
107 static inline struct nfs4_label *
108 nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
109 struct iattr *sattr, struct nfs4_label *label)
116 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
119 err = security_dentry_init_security(dentry, sattr->ia_mode,
120 &dentry->d_name, (void **)&label->label, &label->len);
127 nfs4_label_release_security(struct nfs4_label *label)
130 security_release_secctx(label->label, label->len);
132 static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
135 return server->attr_bitmask;
137 return server->attr_bitmask_nl;
140 static inline struct nfs4_label *
141 nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
142 struct iattr *sattr, struct nfs4_label *l)
145 nfs4_label_release_security(struct nfs4_label *label)
148 nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
149 { return server->attr_bitmask; }
152 /* Prevent leaks of NFSv4 errors into userland */
153 static int nfs4_map_errors(int err)
158 case -NFS4ERR_RESOURCE:
159 case -NFS4ERR_LAYOUTTRYLATER:
160 case -NFS4ERR_RECALLCONFLICT:
162 case -NFS4ERR_WRONGSEC:
163 case -NFS4ERR_WRONG_CRED:
165 case -NFS4ERR_BADOWNER:
166 case -NFS4ERR_BADNAME:
168 case -NFS4ERR_SHARE_DENIED:
170 case -NFS4ERR_MINOR_VERS_MISMATCH:
171 return -EPROTONOSUPPORT;
172 case -NFS4ERR_FILE_OPEN:
175 dprintk("%s could not handle NFSv4 error %d\n",
183 * This is our standard bitmap for GETATTR requests.
185 const u32 nfs4_fattr_bitmap[3] = {
187 | FATTR4_WORD0_CHANGE
190 | FATTR4_WORD0_FILEID,
192 | FATTR4_WORD1_NUMLINKS
194 | FATTR4_WORD1_OWNER_GROUP
195 | FATTR4_WORD1_RAWDEV
196 | FATTR4_WORD1_SPACE_USED
197 | FATTR4_WORD1_TIME_ACCESS
198 | FATTR4_WORD1_TIME_METADATA
199 | FATTR4_WORD1_TIME_MODIFY
200 | FATTR4_WORD1_MOUNTED_ON_FILEID,
201 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
202 FATTR4_WORD2_SECURITY_LABEL
206 static const u32 nfs4_pnfs_open_bitmap[3] = {
208 | FATTR4_WORD0_CHANGE
211 | FATTR4_WORD0_FILEID,
213 | FATTR4_WORD1_NUMLINKS
215 | FATTR4_WORD1_OWNER_GROUP
216 | FATTR4_WORD1_RAWDEV
217 | FATTR4_WORD1_SPACE_USED
218 | FATTR4_WORD1_TIME_ACCESS
219 | FATTR4_WORD1_TIME_METADATA
220 | FATTR4_WORD1_TIME_MODIFY,
221 FATTR4_WORD2_MDSTHRESHOLD
222 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
223 | FATTR4_WORD2_SECURITY_LABEL
227 static const u32 nfs4_open_noattr_bitmap[3] = {
229 | FATTR4_WORD0_CHANGE
230 | FATTR4_WORD0_FILEID,
233 const u32 nfs4_statfs_bitmap[3] = {
234 FATTR4_WORD0_FILES_AVAIL
235 | FATTR4_WORD0_FILES_FREE
236 | FATTR4_WORD0_FILES_TOTAL,
237 FATTR4_WORD1_SPACE_AVAIL
238 | FATTR4_WORD1_SPACE_FREE
239 | FATTR4_WORD1_SPACE_TOTAL
242 const u32 nfs4_pathconf_bitmap[3] = {
244 | FATTR4_WORD0_MAXNAME,
248 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
249 | FATTR4_WORD0_MAXREAD
250 | FATTR4_WORD0_MAXWRITE
251 | FATTR4_WORD0_LEASE_TIME,
252 FATTR4_WORD1_TIME_DELTA
253 | FATTR4_WORD1_FS_LAYOUT_TYPES,
254 FATTR4_WORD2_LAYOUT_BLKSIZE
255 | FATTR4_WORD2_CLONE_BLKSIZE
258 const u32 nfs4_fs_locations_bitmap[3] = {
260 | FATTR4_WORD0_CHANGE
263 | FATTR4_WORD0_FILEID
264 | FATTR4_WORD0_FS_LOCATIONS,
266 | FATTR4_WORD1_NUMLINKS
268 | FATTR4_WORD1_OWNER_GROUP
269 | FATTR4_WORD1_RAWDEV
270 | FATTR4_WORD1_SPACE_USED
271 | FATTR4_WORD1_TIME_ACCESS
272 | FATTR4_WORD1_TIME_METADATA
273 | FATTR4_WORD1_TIME_MODIFY
274 | FATTR4_WORD1_MOUNTED_ON_FILEID,
277 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
278 struct nfs4_readdir_arg *readdir)
283 readdir->cookie = cookie;
284 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
289 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
294 * NFSv4 servers do not return entries for '.' and '..'
295 * Therefore, we fake these entries here. We let '.'
296 * have cookie 0 and '..' have cookie 1. Note that
297 * when talking to the server, we always send cookie 0
300 start = p = kmap_atomic(*readdir->pages);
303 *p++ = xdr_one; /* next */
304 *p++ = xdr_zero; /* cookie, first word */
305 *p++ = xdr_one; /* cookie, second word */
306 *p++ = xdr_one; /* entry len */
307 memcpy(p, ".\0\0\0", 4); /* entry */
309 *p++ = xdr_one; /* bitmap length */
310 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
311 *p++ = htonl(8); /* attribute buffer length */
312 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
315 *p++ = xdr_one; /* next */
316 *p++ = xdr_zero; /* cookie, first word */
317 *p++ = xdr_two; /* cookie, second word */
318 *p++ = xdr_two; /* entry len */
319 memcpy(p, "..\0\0", 4); /* entry */
321 *p++ = xdr_one; /* bitmap length */
322 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
323 *p++ = htonl(8); /* attribute buffer length */
324 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
326 readdir->pgbase = (char *)p - (char *)start;
327 readdir->count -= readdir->pgbase;
328 kunmap_atomic(start);
331 static void nfs4_test_and_free_stateid(struct nfs_server *server,
332 nfs4_stateid *stateid,
333 struct rpc_cred *cred)
335 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops;
337 ops->test_and_free_expired(server, stateid, cred);
340 static void __nfs4_free_revoked_stateid(struct nfs_server *server,
341 nfs4_stateid *stateid,
342 struct rpc_cred *cred)
344 stateid->type = NFS4_REVOKED_STATEID_TYPE;
345 nfs4_test_and_free_stateid(server, stateid, cred);
348 static void nfs4_free_revoked_stateid(struct nfs_server *server,
349 const nfs4_stateid *stateid,
350 struct rpc_cred *cred)
354 nfs4_stateid_copy(&tmp, stateid);
355 __nfs4_free_revoked_stateid(server, &tmp, cred);
358 static long nfs4_update_delay(long *timeout)
362 return NFS4_POLL_RETRY_MAX;
364 *timeout = NFS4_POLL_RETRY_MIN;
365 if (*timeout > NFS4_POLL_RETRY_MAX)
366 *timeout = NFS4_POLL_RETRY_MAX;
372 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
378 freezable_schedule_timeout_killable_unsafe(
379 nfs4_update_delay(timeout));
380 if (fatal_signal_pending(current))
385 /* This is the error handling routine for processes that are allowed
388 static int nfs4_do_handle_exception(struct nfs_server *server,
389 int errorcode, struct nfs4_exception *exception)
391 struct nfs_client *clp = server->nfs_client;
392 struct nfs4_state *state = exception->state;
393 const nfs4_stateid *stateid = exception->stateid;
394 struct inode *inode = exception->inode;
397 exception->delay = 0;
398 exception->recovering = 0;
399 exception->retry = 0;
403 case -NFS4ERR_OPENMODE:
404 case -NFS4ERR_DELEG_REVOKED:
405 case -NFS4ERR_ADMIN_REVOKED:
406 case -NFS4ERR_BAD_STATEID:
410 err = nfs_async_inode_return_delegation(inode,
413 goto wait_on_recovery;
414 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) {
415 exception->retry = 1;
421 ret = nfs4_schedule_stateid_recovery(server, state);
424 goto wait_on_recovery;
425 case -NFS4ERR_EXPIRED:
427 ret = nfs4_schedule_stateid_recovery(server, state);
431 case -NFS4ERR_STALE_STATEID:
432 case -NFS4ERR_STALE_CLIENTID:
433 nfs4_schedule_lease_recovery(clp);
434 goto wait_on_recovery;
436 ret = nfs4_schedule_migration_recovery(server);
439 goto wait_on_recovery;
440 case -NFS4ERR_LEASE_MOVED:
441 nfs4_schedule_lease_moved_recovery(clp);
442 goto wait_on_recovery;
443 #if defined(CONFIG_NFS_V4_1)
444 case -NFS4ERR_BADSESSION:
445 case -NFS4ERR_BADSLOT:
446 case -NFS4ERR_BAD_HIGH_SLOT:
447 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
448 case -NFS4ERR_DEADSESSION:
449 case -NFS4ERR_SEQ_FALSE_RETRY:
450 case -NFS4ERR_SEQ_MISORDERED:
451 dprintk("%s ERROR: %d Reset session\n", __func__,
453 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
454 goto wait_on_recovery;
455 #endif /* defined(CONFIG_NFS_V4_1) */
456 case -NFS4ERR_FILE_OPEN:
457 if (exception->timeout > HZ) {
458 /* We have retried a decent amount, time to
465 nfs_inc_server_stats(server, NFSIOS_DELAY);
467 case -NFS4ERR_LAYOUTTRYLATER:
468 case -NFS4ERR_RECALLCONFLICT:
469 exception->delay = 1;
472 case -NFS4ERR_RETRY_UNCACHED_REP:
473 case -NFS4ERR_OLD_STATEID:
474 exception->retry = 1;
476 case -NFS4ERR_BADOWNER:
477 /* The following works around a Linux server bug! */
478 case -NFS4ERR_BADNAME:
479 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
480 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
481 exception->retry = 1;
482 printk(KERN_WARNING "NFS: v4 server %s "
483 "does not accept raw "
485 "Reenabling the idmapper.\n",
486 server->nfs_client->cl_hostname);
489 /* We failed to handle the error */
490 return nfs4_map_errors(ret);
492 exception->recovering = 1;
496 /* This is the error handling routine for processes that are allowed
499 int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
501 struct nfs_client *clp = server->nfs_client;
504 ret = nfs4_do_handle_exception(server, errorcode, exception);
505 if (exception->delay) {
506 ret = nfs4_delay(server->client, &exception->timeout);
509 if (exception->recovering) {
510 ret = nfs4_wait_clnt_recover(clp);
511 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
518 exception->retry = 1;
523 nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
524 int errorcode, struct nfs4_exception *exception)
526 struct nfs_client *clp = server->nfs_client;
529 ret = nfs4_do_handle_exception(server, errorcode, exception);
530 if (exception->delay) {
531 rpc_delay(task, nfs4_update_delay(&exception->timeout));
534 if (exception->recovering) {
535 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
536 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
537 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
540 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
545 exception->retry = 1;
550 nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
551 struct nfs4_state *state, long *timeout)
553 struct nfs4_exception exception = {
557 if (task->tk_status >= 0)
560 exception.timeout = *timeout;
561 task->tk_status = nfs4_async_handle_exception(task, server,
564 if (exception.delay && timeout)
565 *timeout = exception.timeout;
572 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
573 * or 'false' otherwise.
575 static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
577 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
579 if (flavor == RPC_AUTH_GSS_KRB5I ||
580 flavor == RPC_AUTH_GSS_KRB5P)
586 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
588 spin_lock(&clp->cl_lock);
589 if (time_before(clp->cl_last_renewal,timestamp))
590 clp->cl_last_renewal = timestamp;
591 spin_unlock(&clp->cl_lock);
594 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
596 struct nfs_client *clp = server->nfs_client;
598 if (!nfs4_has_session(clp))
599 do_renew_lease(clp, timestamp);
602 struct nfs4_call_sync_data {
603 const struct nfs_server *seq_server;
604 struct nfs4_sequence_args *seq_args;
605 struct nfs4_sequence_res *seq_res;
608 void nfs4_init_sequence(struct nfs4_sequence_args *args,
609 struct nfs4_sequence_res *res, int cache_reply)
611 args->sa_slot = NULL;
612 args->sa_cache_this = cache_reply;
613 args->sa_privileged = 0;
618 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
620 args->sa_privileged = 1;
623 int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
624 struct nfs4_sequence_args *args,
625 struct nfs4_sequence_res *res,
626 struct rpc_task *task)
628 struct nfs4_slot *slot;
630 /* slot already allocated? */
631 if (res->sr_slot != NULL)
634 spin_lock(&tbl->slot_tbl_lock);
635 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
638 slot = nfs4_alloc_slot(tbl);
640 if (slot == ERR_PTR(-ENOMEM))
641 task->tk_timeout = HZ >> 2;
644 spin_unlock(&tbl->slot_tbl_lock);
646 slot->privileged = args->sa_privileged ? 1 : 0;
647 args->sa_slot = slot;
651 rpc_call_start(task);
655 if (args->sa_privileged)
656 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
657 NULL, RPC_PRIORITY_PRIVILEGED);
659 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
660 spin_unlock(&tbl->slot_tbl_lock);
663 EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
665 static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res)
667 struct nfs4_slot *slot = res->sr_slot;
668 struct nfs4_slot_table *tbl;
671 spin_lock(&tbl->slot_tbl_lock);
672 if (!nfs41_wake_and_assign_slot(tbl, slot))
673 nfs4_free_slot(tbl, slot);
674 spin_unlock(&tbl->slot_tbl_lock);
679 static int nfs40_sequence_done(struct rpc_task *task,
680 struct nfs4_sequence_res *res)
682 if (res->sr_slot != NULL)
683 nfs40_sequence_free_slot(res);
687 #if defined(CONFIG_NFS_V4_1)
689 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
691 struct nfs4_session *session;
692 struct nfs4_slot_table *tbl;
693 struct nfs4_slot *slot = res->sr_slot;
694 bool send_new_highest_used_slotid = false;
697 session = tbl->session;
699 /* Bump the slot sequence number */
704 spin_lock(&tbl->slot_tbl_lock);
705 /* Be nice to the server: try to ensure that the last transmitted
706 * value for highest_user_slotid <= target_highest_slotid
708 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
709 send_new_highest_used_slotid = true;
711 if (nfs41_wake_and_assign_slot(tbl, slot)) {
712 send_new_highest_used_slotid = false;
715 nfs4_free_slot(tbl, slot);
717 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
718 send_new_highest_used_slotid = false;
720 spin_unlock(&tbl->slot_tbl_lock);
722 if (send_new_highest_used_slotid)
723 nfs41_notify_server(session->clp);
724 if (waitqueue_active(&tbl->slot_waitq))
725 wake_up_all(&tbl->slot_waitq);
728 static int nfs41_sequence_process(struct rpc_task *task,
729 struct nfs4_sequence_res *res)
731 struct nfs4_session *session;
732 struct nfs4_slot *slot = res->sr_slot;
733 struct nfs_client *clp;
734 bool interrupted = false;
739 /* don't increment the sequence number if the task wasn't sent */
740 if (!RPC_WAS_SENT(task))
743 session = slot->table->session;
745 if (slot->interrupted) {
746 slot->interrupted = 0;
750 trace_nfs4_sequence_done(session, res);
751 /* Check the SEQUENCE operation status */
752 switch (res->sr_status) {
754 /* Update the slot's sequence and clientid lease timer */
757 do_renew_lease(clp, res->sr_timestamp);
758 /* Check sequence flags */
759 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags,
761 nfs41_update_target_slotid(slot->table, slot, res);
765 * sr_status remains 1 if an RPC level error occurred.
766 * The server may or may not have processed the sequence
768 * Mark the slot as having hosted an interrupted RPC call.
770 slot->interrupted = 1;
773 /* The server detected a resend of the RPC call and
774 * returned NFS4ERR_DELAY as per Section 2.10.6.2
777 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
782 case -NFS4ERR_BADSLOT:
784 * The slot id we used was probably retired. Try again
785 * using a different slot id.
788 case -NFS4ERR_SEQ_MISORDERED:
790 * Was the last operation on this sequence interrupted?
791 * If so, retry after bumping the sequence number.
798 * Could this slot have been previously retired?
799 * If so, then the server may be expecting seq_nr = 1!
801 if (slot->seq_nr != 1) {
806 case -NFS4ERR_SEQ_FALSE_RETRY:
810 /* Just update the slot sequence no. */
814 /* The session may be reset by one of the error handlers. */
815 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
819 if (rpc_restart_call_prepare(task)) {
820 nfs41_sequence_free_slot(res);
826 if (!rpc_restart_call(task))
828 rpc_delay(task, NFS4_POLL_RETRY_MAX);
832 int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
834 if (!nfs41_sequence_process(task, res))
836 if (res->sr_slot != NULL)
837 nfs41_sequence_free_slot(res);
841 EXPORT_SYMBOL_GPL(nfs41_sequence_done);
843 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
845 if (res->sr_slot == NULL)
847 if (res->sr_slot->table->session != NULL)
848 return nfs41_sequence_process(task, res);
849 return nfs40_sequence_done(task, res);
852 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
854 if (res->sr_slot != NULL) {
855 if (res->sr_slot->table->session != NULL)
856 nfs41_sequence_free_slot(res);
858 nfs40_sequence_free_slot(res);
862 int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
864 if (res->sr_slot == NULL)
866 if (!res->sr_slot->table->session)
867 return nfs40_sequence_done(task, res);
868 return nfs41_sequence_done(task, res);
870 EXPORT_SYMBOL_GPL(nfs4_sequence_done);
872 int nfs41_setup_sequence(struct nfs4_session *session,
873 struct nfs4_sequence_args *args,
874 struct nfs4_sequence_res *res,
875 struct rpc_task *task)
877 struct nfs4_slot *slot;
878 struct nfs4_slot_table *tbl;
880 dprintk("--> %s\n", __func__);
881 /* slot already allocated? */
882 if (res->sr_slot != NULL)
885 tbl = &session->fc_slot_table;
887 task->tk_timeout = 0;
889 spin_lock(&tbl->slot_tbl_lock);
890 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
891 !args->sa_privileged) {
892 /* The state manager will wait until the slot table is empty */
893 dprintk("%s session is draining\n", __func__);
897 slot = nfs4_alloc_slot(tbl);
899 /* If out of memory, try again in 1/4 second */
900 if (slot == ERR_PTR(-ENOMEM))
901 task->tk_timeout = HZ >> 2;
902 dprintk("<-- %s: no free slots\n", __func__);
905 spin_unlock(&tbl->slot_tbl_lock);
907 slot->privileged = args->sa_privileged ? 1 : 0;
908 args->sa_slot = slot;
910 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
911 slot->slot_nr, slot->seq_nr);
914 res->sr_timestamp = jiffies;
915 res->sr_status_flags = 0;
917 * sr_status is only set in decode_sequence, and so will remain
918 * set to 1 if an rpc level failure occurs.
921 trace_nfs4_setup_sequence(session, args);
923 rpc_call_start(task);
926 /* Privileged tasks are queued with top priority */
927 if (args->sa_privileged)
928 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
929 NULL, RPC_PRIORITY_PRIVILEGED);
931 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
932 spin_unlock(&tbl->slot_tbl_lock);
935 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
937 static int nfs4_setup_sequence(const struct nfs_server *server,
938 struct nfs4_sequence_args *args,
939 struct nfs4_sequence_res *res,
940 struct rpc_task *task)
942 struct nfs4_session *session = nfs4_get_session(server);
946 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
949 dprintk("--> %s clp %p session %p sr_slot %u\n",
950 __func__, session->clp, session, res->sr_slot ?
951 res->sr_slot->slot_nr : NFS4_NO_SLOT);
953 ret = nfs41_setup_sequence(session, args, res, task);
955 dprintk("<-- %s status=%d\n", __func__, ret);
959 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
961 struct nfs4_call_sync_data *data = calldata;
962 struct nfs4_session *session = nfs4_get_session(data->seq_server);
964 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
966 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
969 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
971 struct nfs4_call_sync_data *data = calldata;
973 nfs41_sequence_done(task, data->seq_res);
976 static const struct rpc_call_ops nfs41_call_sync_ops = {
977 .rpc_call_prepare = nfs41_call_sync_prepare,
978 .rpc_call_done = nfs41_call_sync_done,
981 #else /* !CONFIG_NFS_V4_1 */
983 static int nfs4_setup_sequence(const struct nfs_server *server,
984 struct nfs4_sequence_args *args,
985 struct nfs4_sequence_res *res,
986 struct rpc_task *task)
988 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
992 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
994 return nfs40_sequence_done(task, res);
997 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
999 if (res->sr_slot != NULL)
1000 nfs40_sequence_free_slot(res);
1003 int nfs4_sequence_done(struct rpc_task *task,
1004 struct nfs4_sequence_res *res)
1006 return nfs40_sequence_done(task, res);
1008 EXPORT_SYMBOL_GPL(nfs4_sequence_done);
1010 #endif /* !CONFIG_NFS_V4_1 */
1012 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
1014 struct nfs4_call_sync_data *data = calldata;
1015 nfs4_setup_sequence(data->seq_server,
1016 data->seq_args, data->seq_res, task);
1019 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
1021 struct nfs4_call_sync_data *data = calldata;
1022 nfs4_sequence_done(task, data->seq_res);
1025 static const struct rpc_call_ops nfs40_call_sync_ops = {
1026 .rpc_call_prepare = nfs40_call_sync_prepare,
1027 .rpc_call_done = nfs40_call_sync_done,
1030 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
1031 struct nfs_server *server,
1032 struct rpc_message *msg,
1033 struct nfs4_sequence_args *args,
1034 struct nfs4_sequence_res *res)
1037 struct rpc_task *task;
1038 struct nfs_client *clp = server->nfs_client;
1039 struct nfs4_call_sync_data data = {
1040 .seq_server = server,
1044 struct rpc_task_setup task_setup = {
1047 .callback_ops = clp->cl_mvops->call_sync_ops,
1048 .callback_data = &data
1051 task = rpc_run_task(&task_setup);
1053 ret = PTR_ERR(task);
1055 ret = task->tk_status;
1061 int nfs4_call_sync(struct rpc_clnt *clnt,
1062 struct nfs_server *server,
1063 struct rpc_message *msg,
1064 struct nfs4_sequence_args *args,
1065 struct nfs4_sequence_res *res,
1068 nfs4_init_sequence(args, res, cache_reply);
1069 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
1072 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1074 struct nfs_inode *nfsi = NFS_I(dir);
1076 spin_lock(&dir->i_lock);
1077 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1078 if (!cinfo->atomic || cinfo->before != dir->i_version)
1079 nfs_force_lookup_revalidate(dir);
1080 dir->i_version = cinfo->after;
1081 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
1082 nfs_fscache_invalidate(dir);
1083 spin_unlock(&dir->i_lock);
1086 struct nfs4_opendata {
1088 struct nfs_openargs o_arg;
1089 struct nfs_openres o_res;
1090 struct nfs_open_confirmargs c_arg;
1091 struct nfs_open_confirmres c_res;
1092 struct nfs4_string owner_name;
1093 struct nfs4_string group_name;
1094 struct nfs4_label *a_label;
1095 struct nfs_fattr f_attr;
1096 struct nfs4_label *f_label;
1098 struct dentry *dentry;
1099 struct nfs4_state_owner *owner;
1100 struct nfs4_state *state;
1102 unsigned long timestamp;
1103 unsigned int rpc_done : 1;
1104 unsigned int file_created : 1;
1105 unsigned int is_recover : 1;
1110 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1111 int err, struct nfs4_exception *exception)
1115 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1117 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1118 exception->retry = 1;
1123 nfs4_map_atomic_open_share(struct nfs_server *server,
1124 fmode_t fmode, int openflags)
1128 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1130 res = NFS4_SHARE_ACCESS_READ;
1133 res = NFS4_SHARE_ACCESS_WRITE;
1135 case FMODE_READ|FMODE_WRITE:
1136 res = NFS4_SHARE_ACCESS_BOTH;
1138 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1140 /* Want no delegation if we're using O_DIRECT */
1141 if (openflags & O_DIRECT)
1142 res |= NFS4_SHARE_WANT_NO_DELEG;
1147 static enum open_claim_type4
1148 nfs4_map_atomic_open_claim(struct nfs_server *server,
1149 enum open_claim_type4 claim)
1151 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1156 case NFS4_OPEN_CLAIM_FH:
1157 return NFS4_OPEN_CLAIM_NULL;
1158 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1159 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1160 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1161 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1165 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1167 p->o_res.f_attr = &p->f_attr;
1168 p->o_res.f_label = p->f_label;
1169 p->o_res.seqid = p->o_arg.seqid;
1170 p->c_res.seqid = p->c_arg.seqid;
1171 p->o_res.server = p->o_arg.server;
1172 p->o_res.access_request = p->o_arg.access;
1173 nfs_fattr_init(&p->f_attr);
1174 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
1177 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
1178 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
1179 const struct iattr *attrs,
1180 struct nfs4_label *label,
1181 enum open_claim_type4 claim,
1184 struct dentry *parent = dget_parent(dentry);
1185 struct inode *dir = d_inode(parent);
1186 struct nfs_server *server = NFS_SERVER(dir);
1187 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1188 struct nfs4_opendata *p;
1190 p = kzalloc(sizeof(*p), gfp_mask);
1194 p->f_label = nfs4_label_alloc(server, gfp_mask);
1195 if (IS_ERR(p->f_label))
1198 p->a_label = nfs4_label_alloc(server, gfp_mask);
1199 if (IS_ERR(p->a_label))
1202 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1203 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
1204 if (IS_ERR(p->o_arg.seqid))
1205 goto err_free_label;
1206 nfs_sb_active(dentry->d_sb);
1207 p->dentry = dget(dentry);
1210 atomic_inc(&sp->so_count);
1211 p->o_arg.open_flags = flags;
1212 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
1213 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1215 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1216 * will return permission denied for all bits until close */
1217 if (!(flags & O_EXCL)) {
1218 /* ask server to check for all possible rights as results
1220 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1221 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
1223 p->o_arg.clientid = server->nfs_client->cl_clientid;
1224 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1225 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
1226 p->o_arg.name = &dentry->d_name;
1227 p->o_arg.server = server;
1228 p->o_arg.bitmask = nfs4_bitmask(server, label);
1229 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1230 p->o_arg.label = nfs4_label_copy(p->a_label, label);
1231 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1232 switch (p->o_arg.claim) {
1233 case NFS4_OPEN_CLAIM_NULL:
1234 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1235 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1236 p->o_arg.fh = NFS_FH(dir);
1238 case NFS4_OPEN_CLAIM_PREVIOUS:
1239 case NFS4_OPEN_CLAIM_FH:
1240 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1241 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1242 p->o_arg.fh = NFS_FH(d_inode(dentry));
1244 if (attrs != NULL && attrs->ia_valid != 0) {
1247 p->o_arg.u.attrs = &p->attrs;
1248 memcpy(&p->attrs, attrs, sizeof(p->attrs));
1251 verf[1] = current->pid;
1252 memcpy(p->o_arg.u.verifier.data, verf,
1253 sizeof(p->o_arg.u.verifier.data));
1255 p->c_arg.fh = &p->o_res.fh;
1256 p->c_arg.stateid = &p->o_res.stateid;
1257 p->c_arg.seqid = p->o_arg.seqid;
1258 nfs4_init_opendata_res(p);
1259 kref_init(&p->kref);
1263 nfs4_label_free(p->a_label);
1265 nfs4_label_free(p->f_label);
1273 static void nfs4_opendata_free(struct kref *kref)
1275 struct nfs4_opendata *p = container_of(kref,
1276 struct nfs4_opendata, kref);
1277 struct super_block *sb = p->dentry->d_sb;
1279 nfs_free_seqid(p->o_arg.seqid);
1280 nfs4_sequence_free_slot(&p->o_res.seq_res);
1281 if (p->state != NULL)
1282 nfs4_put_open_state(p->state);
1283 nfs4_put_state_owner(p->owner);
1285 nfs4_label_free(p->a_label);
1286 nfs4_label_free(p->f_label);
1290 nfs_sb_deactive(sb);
1291 nfs_fattr_free_names(&p->f_attr);
1292 kfree(p->f_attr.mdsthreshold);
1296 static void nfs4_opendata_put(struct nfs4_opendata *p)
1299 kref_put(&p->kref, nfs4_opendata_free);
1302 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1306 ret = rpc_wait_for_completion_task(task);
1310 static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1313 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1314 case FMODE_READ|FMODE_WRITE:
1315 return state->n_rdwr != 0;
1317 return state->n_wronly != 0;
1319 return state->n_rdonly != 0;
1325 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
1329 if (open_mode & (O_EXCL|O_TRUNC))
1331 switch (mode & (FMODE_READ|FMODE_WRITE)) {
1333 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1334 && state->n_rdonly != 0;
1337 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1338 && state->n_wronly != 0;
1340 case FMODE_READ|FMODE_WRITE:
1341 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1342 && state->n_rdwr != 0;
1348 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1349 enum open_claim_type4 claim)
1351 if (delegation == NULL)
1353 if ((delegation->type & fmode) != fmode)
1355 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1358 case NFS4_OPEN_CLAIM_NULL:
1359 case NFS4_OPEN_CLAIM_FH:
1361 case NFS4_OPEN_CLAIM_PREVIOUS:
1362 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1367 nfs_mark_delegation_referenced(delegation);
1371 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
1380 case FMODE_READ|FMODE_WRITE:
1383 nfs4_state_set_mode_locked(state, state->state | fmode);
1386 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1388 struct nfs_client *clp = state->owner->so_server->nfs_client;
1389 bool need_recover = false;
1391 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1392 need_recover = true;
1393 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1394 need_recover = true;
1395 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1396 need_recover = true;
1398 nfs4_state_mark_reclaim_nograce(clp, state);
1401 static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1402 nfs4_stateid *stateid)
1404 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1406 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1407 nfs_test_and_clear_all_open_stateid(state);
1410 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1415 static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1417 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1419 if (state->n_wronly)
1420 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1421 if (state->n_rdonly)
1422 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1424 set_bit(NFS_O_RDWR_STATE, &state->flags);
1425 set_bit(NFS_OPEN_STATE, &state->flags);
1428 static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1429 nfs4_stateid *arg_stateid,
1430 nfs4_stateid *stateid, fmode_t fmode)
1432 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1433 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1435 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1438 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1441 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1442 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1443 clear_bit(NFS_OPEN_STATE, &state->flags);
1445 if (stateid == NULL)
1447 /* Handle races with OPEN */
1448 if (!nfs4_stateid_match_other(arg_stateid, &state->open_stateid) ||
1449 (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1450 !nfs4_stateid_is_newer(stateid, &state->open_stateid))) {
1451 nfs_resync_open_stateid_locked(state);
1454 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1455 nfs4_stateid_copy(&state->stateid, stateid);
1456 nfs4_stateid_copy(&state->open_stateid, stateid);
1459 static void nfs_clear_open_stateid(struct nfs4_state *state,
1460 nfs4_stateid *arg_stateid,
1461 nfs4_stateid *stateid, fmode_t fmode)
1463 write_seqlock(&state->seqlock);
1464 nfs_clear_open_stateid_locked(state, arg_stateid, stateid, fmode);
1465 write_sequnlock(&state->seqlock);
1466 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1467 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1470 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1474 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1477 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1479 case FMODE_READ|FMODE_WRITE:
1480 set_bit(NFS_O_RDWR_STATE, &state->flags);
1482 if (!nfs_need_update_open_stateid(state, stateid))
1484 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1485 nfs4_stateid_copy(&state->stateid, stateid);
1486 nfs4_stateid_copy(&state->open_stateid, stateid);
1489 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1492 * Protect the call to nfs4_state_set_mode_locked and
1493 * serialise the stateid update
1495 spin_lock(&state->owner->so_lock);
1496 write_seqlock(&state->seqlock);
1497 if (deleg_stateid != NULL) {
1498 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1499 set_bit(NFS_DELEGATED_STATE, &state->flags);
1501 if (open_stateid != NULL)
1502 nfs_set_open_stateid_locked(state, open_stateid, fmode);
1503 write_sequnlock(&state->seqlock);
1504 update_open_stateflags(state, fmode);
1505 spin_unlock(&state->owner->so_lock);
1508 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
1510 struct nfs_inode *nfsi = NFS_I(state->inode);
1511 struct nfs_delegation *deleg_cur;
1514 fmode &= (FMODE_READ|FMODE_WRITE);
1517 deleg_cur = rcu_dereference(nfsi->delegation);
1518 if (deleg_cur == NULL)
1521 spin_lock(&deleg_cur->lock);
1522 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
1523 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
1524 (deleg_cur->type & fmode) != fmode)
1525 goto no_delegation_unlock;
1527 if (delegation == NULL)
1528 delegation = &deleg_cur->stateid;
1529 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1530 goto no_delegation_unlock;
1532 nfs_mark_delegation_referenced(deleg_cur);
1533 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1535 no_delegation_unlock:
1536 spin_unlock(&deleg_cur->lock);
1540 if (!ret && open_stateid != NULL) {
1541 __update_open_stateid(state, open_stateid, NULL, fmode);
1544 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1545 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1550 static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1551 const nfs4_stateid *stateid)
1553 struct nfs4_state *state = lsp->ls_state;
1556 spin_lock(&state->state_lock);
1557 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1559 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1561 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1564 spin_unlock(&state->state_lock);
1568 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1570 struct nfs_delegation *delegation;
1573 delegation = rcu_dereference(NFS_I(inode)->delegation);
1574 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1579 nfs4_inode_return_delegation(inode);
1582 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1584 struct nfs4_state *state = opendata->state;
1585 struct nfs_inode *nfsi = NFS_I(state->inode);
1586 struct nfs_delegation *delegation;
1587 int open_mode = opendata->o_arg.open_flags;
1588 fmode_t fmode = opendata->o_arg.fmode;
1589 enum open_claim_type4 claim = opendata->o_arg.claim;
1590 nfs4_stateid stateid;
1594 spin_lock(&state->owner->so_lock);
1595 if (can_open_cached(state, fmode, open_mode)) {
1596 update_open_stateflags(state, fmode);
1597 spin_unlock(&state->owner->so_lock);
1598 goto out_return_state;
1600 spin_unlock(&state->owner->so_lock);
1602 delegation = rcu_dereference(nfsi->delegation);
1603 if (!can_open_delegated(delegation, fmode, claim)) {
1607 /* Save the delegation */
1608 nfs4_stateid_copy(&stateid, &delegation->stateid);
1610 nfs_release_seqid(opendata->o_arg.seqid);
1611 if (!opendata->is_recover) {
1612 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1618 /* Try to update the stateid using the delegation */
1619 if (update_open_stateid(state, NULL, &stateid, fmode))
1620 goto out_return_state;
1623 return ERR_PTR(ret);
1625 atomic_inc(&state->count);
1630 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1632 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1633 struct nfs_delegation *delegation;
1634 int delegation_flags = 0;
1637 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1639 delegation_flags = delegation->flags;
1641 switch (data->o_arg.claim) {
1644 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1645 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1646 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1647 "returning a delegation for "
1648 "OPEN(CLAIM_DELEGATE_CUR)\n",
1652 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1653 nfs_inode_set_delegation(state->inode,
1654 data->owner->so_cred,
1657 nfs_inode_reclaim_delegation(state->inode,
1658 data->owner->so_cred,
1663 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1664 * and update the nfs4_state.
1666 static struct nfs4_state *
1667 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1669 struct inode *inode = data->state->inode;
1670 struct nfs4_state *state = data->state;
1673 if (!data->rpc_done) {
1674 if (data->rpc_status) {
1675 ret = data->rpc_status;
1678 /* cached opens have already been processed */
1682 ret = nfs_refresh_inode(inode, &data->f_attr);
1686 if (data->o_res.delegation_type != 0)
1687 nfs4_opendata_check_deleg(data, state);
1689 update_open_stateid(state, &data->o_res.stateid, NULL,
1691 atomic_inc(&state->count);
1695 return ERR_PTR(ret);
1699 static struct nfs4_state *
1700 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1702 struct inode *inode;
1703 struct nfs4_state *state = NULL;
1706 if (!data->rpc_done) {
1707 state = nfs4_try_open_cached(data);
1708 trace_nfs4_cached_open(data->state);
1713 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1715 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1716 ret = PTR_ERR(inode);
1720 state = nfs4_get_open_state(inode, data->owner);
1723 if (data->o_res.delegation_type != 0)
1724 nfs4_opendata_check_deleg(data, state);
1725 update_open_stateid(state, &data->o_res.stateid, NULL,
1729 nfs_release_seqid(data->o_arg.seqid);
1734 return ERR_PTR(ret);
1737 static struct nfs4_state *
1738 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1740 struct nfs4_state *ret;
1742 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1743 ret =_nfs4_opendata_reclaim_to_nfs4_state(data);
1745 ret = _nfs4_opendata_to_nfs4_state(data);
1746 nfs4_sequence_free_slot(&data->o_res.seq_res);
1750 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1752 struct nfs_inode *nfsi = NFS_I(state->inode);
1753 struct nfs_open_context *ctx;
1755 spin_lock(&state->inode->i_lock);
1756 list_for_each_entry(ctx, &nfsi->open_files, list) {
1757 if (ctx->state != state)
1759 get_nfs_open_context(ctx);
1760 spin_unlock(&state->inode->i_lock);
1763 spin_unlock(&state->inode->i_lock);
1764 return ERR_PTR(-ENOENT);
1767 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1768 struct nfs4_state *state, enum open_claim_type4 claim)
1770 struct nfs4_opendata *opendata;
1772 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1773 NULL, NULL, claim, GFP_NOFS);
1774 if (opendata == NULL)
1775 return ERR_PTR(-ENOMEM);
1776 opendata->state = state;
1777 atomic_inc(&state->count);
1781 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1784 struct nfs4_state *newstate;
1787 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
1789 opendata->o_arg.open_flags = 0;
1790 opendata->o_arg.fmode = fmode;
1791 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1792 NFS_SB(opendata->dentry->d_sb),
1794 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1795 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1796 nfs4_init_opendata_res(opendata);
1797 ret = _nfs4_recover_proc_open(opendata);
1800 newstate = nfs4_opendata_to_nfs4_state(opendata);
1801 if (IS_ERR(newstate))
1802 return PTR_ERR(newstate);
1803 if (newstate != opendata->state)
1805 nfs4_close_state(newstate, fmode);
1809 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1813 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1814 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1815 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1816 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1817 /* memory barrier prior to reading state->n_* */
1818 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1819 clear_bit(NFS_OPEN_STATE, &state->flags);
1821 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1824 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1827 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1831 * We may have performed cached opens for all three recoveries.
1832 * Check if we need to update the current stateid.
1834 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1835 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1836 write_seqlock(&state->seqlock);
1837 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1838 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1839 write_sequnlock(&state->seqlock);
1846 * reclaim state on the server after a reboot.
1848 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1850 struct nfs_delegation *delegation;
1851 struct nfs4_opendata *opendata;
1852 fmode_t delegation_type = 0;
1855 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1856 NFS4_OPEN_CLAIM_PREVIOUS);
1857 if (IS_ERR(opendata))
1858 return PTR_ERR(opendata);
1860 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1861 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1862 delegation_type = delegation->type;
1864 opendata->o_arg.u.delegation_type = delegation_type;
1865 status = nfs4_open_recover(opendata, state);
1866 nfs4_opendata_put(opendata);
1870 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1872 struct nfs_server *server = NFS_SERVER(state->inode);
1873 struct nfs4_exception exception = { };
1876 err = _nfs4_do_open_reclaim(ctx, state);
1877 trace_nfs4_open_reclaim(ctx, 0, err);
1878 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1880 if (err != -NFS4ERR_DELAY)
1882 nfs4_handle_exception(server, err, &exception);
1883 } while (exception.retry);
1887 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1889 struct nfs_open_context *ctx;
1892 ctx = nfs4_state_find_open_context(state);
1895 ret = nfs4_do_open_reclaim(ctx, state);
1896 put_nfs_open_context(ctx);
1900 static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1904 printk(KERN_ERR "NFS: %s: unhandled error "
1905 "%d.\n", __func__, err);
1911 case -NFS4ERR_BADSESSION:
1912 case -NFS4ERR_BADSLOT:
1913 case -NFS4ERR_BAD_HIGH_SLOT:
1914 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1915 case -NFS4ERR_DEADSESSION:
1916 set_bit(NFS_DELEGATED_STATE, &state->flags);
1917 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1919 case -NFS4ERR_STALE_CLIENTID:
1920 case -NFS4ERR_STALE_STATEID:
1921 set_bit(NFS_DELEGATED_STATE, &state->flags);
1922 /* Don't recall a delegation if it was lost */
1923 nfs4_schedule_lease_recovery(server->nfs_client);
1925 case -NFS4ERR_MOVED:
1926 nfs4_schedule_migration_recovery(server);
1928 case -NFS4ERR_LEASE_MOVED:
1929 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1931 case -NFS4ERR_DELEG_REVOKED:
1932 case -NFS4ERR_ADMIN_REVOKED:
1933 case -NFS4ERR_EXPIRED:
1934 case -NFS4ERR_BAD_STATEID:
1935 case -NFS4ERR_OPENMODE:
1936 nfs_inode_find_state_and_recover(state->inode,
1938 nfs4_schedule_stateid_recovery(server, state);
1940 case -NFS4ERR_DELAY:
1941 case -NFS4ERR_GRACE:
1942 set_bit(NFS_DELEGATED_STATE, &state->flags);
1946 case -NFS4ERR_DENIED:
1947 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1953 int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
1954 struct nfs4_state *state, const nfs4_stateid *stateid,
1957 struct nfs_server *server = NFS_SERVER(state->inode);
1958 struct nfs4_opendata *opendata;
1961 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1962 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1963 if (IS_ERR(opendata))
1964 return PTR_ERR(opendata);
1965 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1966 write_seqlock(&state->seqlock);
1967 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1968 write_sequnlock(&state->seqlock);
1969 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1970 switch (type & (FMODE_READ|FMODE_WRITE)) {
1971 case FMODE_READ|FMODE_WRITE:
1973 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1976 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1980 err = nfs4_open_recover_helper(opendata, FMODE_READ);
1982 nfs4_opendata_put(opendata);
1983 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1986 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1988 struct nfs4_opendata *data = calldata;
1990 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
1991 &data->c_arg.seq_args, &data->c_res.seq_res, task);
1994 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1996 struct nfs4_opendata *data = calldata;
1998 nfs40_sequence_done(task, &data->c_res.seq_res);
2000 data->rpc_status = task->tk_status;
2001 if (data->rpc_status == 0) {
2002 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
2003 nfs_confirm_seqid(&data->owner->so_seqid, 0);
2004 renew_lease(data->o_res.server, data->timestamp);
2009 static void nfs4_open_confirm_release(void *calldata)
2011 struct nfs4_opendata *data = calldata;
2012 struct nfs4_state *state = NULL;
2014 /* If this request hasn't been cancelled, do nothing */
2015 if (data->cancelled == 0)
2017 /* In case of error, no cleanup! */
2018 if (!data->rpc_done)
2020 state = nfs4_opendata_to_nfs4_state(data);
2022 nfs4_close_state(state, data->o_arg.fmode);
2024 nfs4_opendata_put(data);
2027 static const struct rpc_call_ops nfs4_open_confirm_ops = {
2028 .rpc_call_prepare = nfs4_open_confirm_prepare,
2029 .rpc_call_done = nfs4_open_confirm_done,
2030 .rpc_release = nfs4_open_confirm_release,
2034 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
2036 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
2038 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
2039 struct rpc_task *task;
2040 struct rpc_message msg = {
2041 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
2042 .rpc_argp = &data->c_arg,
2043 .rpc_resp = &data->c_res,
2044 .rpc_cred = data->owner->so_cred,
2046 struct rpc_task_setup task_setup_data = {
2047 .rpc_client = server->client,
2048 .rpc_message = &msg,
2049 .callback_ops = &nfs4_open_confirm_ops,
2050 .callback_data = data,
2051 .workqueue = nfsiod_workqueue,
2052 .flags = RPC_TASK_ASYNC,
2056 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
2057 kref_get(&data->kref);
2059 data->rpc_status = 0;
2060 data->timestamp = jiffies;
2061 if (data->is_recover)
2062 nfs4_set_sequence_privileged(&data->c_arg.seq_args);
2063 task = rpc_run_task(&task_setup_data);
2065 return PTR_ERR(task);
2066 status = nfs4_wait_for_completion_rpc_task(task);
2068 data->cancelled = 1;
2071 status = data->rpc_status;
2076 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
2078 struct nfs4_opendata *data = calldata;
2079 struct nfs4_state_owner *sp = data->owner;
2080 struct nfs_client *clp = sp->so_server->nfs_client;
2081 enum open_claim_type4 claim = data->o_arg.claim;
2083 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
2086 * Check if we still need to send an OPEN call, or if we can use
2087 * a delegation instead.
2089 if (data->state != NULL) {
2090 struct nfs_delegation *delegation;
2092 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
2095 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2096 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
2097 goto unlock_no_action;
2100 /* Update client id. */
2101 data->o_arg.clientid = clp->cl_clientid;
2105 case NFS4_OPEN_CLAIM_PREVIOUS:
2106 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
2107 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2108 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
2109 case NFS4_OPEN_CLAIM_FH:
2110 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
2111 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
2113 data->timestamp = jiffies;
2114 if (nfs4_setup_sequence(data->o_arg.server,
2115 &data->o_arg.seq_args,
2116 &data->o_res.seq_res,
2118 nfs_release_seqid(data->o_arg.seqid);
2120 /* Set the create mode (note dependency on the session type) */
2121 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2122 if (data->o_arg.open_flags & O_EXCL) {
2123 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2124 if (nfs4_has_persistent_session(clp))
2125 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2126 else if (clp->cl_mvops->minor_version > 0)
2127 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2131 trace_nfs4_cached_open(data->state);
2134 task->tk_action = NULL;
2136 nfs4_sequence_done(task, &data->o_res.seq_res);
2139 static void nfs4_open_done(struct rpc_task *task, void *calldata)
2141 struct nfs4_opendata *data = calldata;
2143 data->rpc_status = task->tk_status;
2145 if (!nfs4_sequence_process(task, &data->o_res.seq_res))
2148 if (task->tk_status == 0) {
2149 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2150 switch (data->o_res.f_attr->mode & S_IFMT) {
2154 data->rpc_status = -ELOOP;
2157 data->rpc_status = -EISDIR;
2160 data->rpc_status = -ENOTDIR;
2163 renew_lease(data->o_res.server, data->timestamp);
2164 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2165 nfs_confirm_seqid(&data->owner->so_seqid, 0);
2170 static void nfs4_open_release(void *calldata)
2172 struct nfs4_opendata *data = calldata;
2173 struct nfs4_state *state = NULL;
2175 /* If this request hasn't been cancelled, do nothing */
2176 if (data->cancelled == 0)
2178 /* In case of error, no cleanup! */
2179 if (data->rpc_status != 0 || !data->rpc_done)
2181 /* In case we need an open_confirm, no cleanup! */
2182 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2184 state = nfs4_opendata_to_nfs4_state(data);
2186 nfs4_close_state(state, data->o_arg.fmode);
2188 nfs4_opendata_put(data);
2191 static const struct rpc_call_ops nfs4_open_ops = {
2192 .rpc_call_prepare = nfs4_open_prepare,
2193 .rpc_call_done = nfs4_open_done,
2194 .rpc_release = nfs4_open_release,
2197 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
2199 struct inode *dir = d_inode(data->dir);
2200 struct nfs_server *server = NFS_SERVER(dir);
2201 struct nfs_openargs *o_arg = &data->o_arg;
2202 struct nfs_openres *o_res = &data->o_res;
2203 struct rpc_task *task;
2204 struct rpc_message msg = {
2205 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2208 .rpc_cred = data->owner->so_cred,
2210 struct rpc_task_setup task_setup_data = {
2211 .rpc_client = server->client,
2212 .rpc_message = &msg,
2213 .callback_ops = &nfs4_open_ops,
2214 .callback_data = data,
2215 .workqueue = nfsiod_workqueue,
2216 .flags = RPC_TASK_ASYNC,
2220 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
2221 kref_get(&data->kref);
2223 data->rpc_status = 0;
2224 data->cancelled = 0;
2225 data->is_recover = 0;
2227 nfs4_set_sequence_privileged(&o_arg->seq_args);
2228 data->is_recover = 1;
2230 task = rpc_run_task(&task_setup_data);
2232 return PTR_ERR(task);
2233 status = nfs4_wait_for_completion_rpc_task(task);
2235 data->cancelled = 1;
2238 status = data->rpc_status;
2244 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2246 struct inode *dir = d_inode(data->dir);
2247 struct nfs_openres *o_res = &data->o_res;
2250 status = nfs4_run_open_task(data, 1);
2251 if (status != 0 || !data->rpc_done)
2254 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2256 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2257 status = _nfs4_proc_open_confirm(data);
2266 * Additional permission checks in order to distinguish between an
2267 * open for read, and an open for execute. This works around the
2268 * fact that NFSv4 OPEN treats read and execute permissions as being
2270 * Note that in the non-execute case, we want to turn off permission
2271 * checking if we just created a new file (POSIX open() semantics).
2273 static int nfs4_opendata_access(struct rpc_cred *cred,
2274 struct nfs4_opendata *opendata,
2275 struct nfs4_state *state, fmode_t fmode,
2278 struct nfs_access_entry cache;
2281 /* access call failed or for some reason the server doesn't
2282 * support any access modes -- defer access call until later */
2283 if (opendata->o_res.access_supported == 0)
2288 * Use openflags to check for exec, because fmode won't
2289 * always have FMODE_EXEC set when file open for exec.
2291 if (openflags & __FMODE_EXEC) {
2292 /* ONLY check for exec rights */
2294 } else if ((fmode & FMODE_READ) && !opendata->file_created)
2298 cache.jiffies = jiffies;
2299 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2300 nfs_access_add_cache(state->inode, &cache);
2302 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
2305 /* even though OPEN succeeded, access is denied. Close the file */
2306 nfs4_close_state(state, fmode);
2311 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2313 static int _nfs4_proc_open(struct nfs4_opendata *data)
2315 struct inode *dir = d_inode(data->dir);
2316 struct nfs_server *server = NFS_SERVER(dir);
2317 struct nfs_openargs *o_arg = &data->o_arg;
2318 struct nfs_openres *o_res = &data->o_res;
2321 status = nfs4_run_open_task(data, 0);
2322 if (!data->rpc_done)
2325 if (status == -NFS4ERR_BADNAME &&
2326 !(o_arg->open_flags & O_CREAT))
2331 nfs_fattr_map_and_free_names(server, &data->f_attr);
2333 if (o_arg->open_flags & O_CREAT) {
2334 update_changeattr(dir, &o_res->cinfo);
2335 if (o_arg->open_flags & O_EXCL)
2336 data->file_created = 1;
2337 else if (o_res->cinfo.before != o_res->cinfo.after)
2338 data->file_created = 1;
2340 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2341 server->caps &= ~NFS_CAP_POSIX_LOCK;
2342 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2343 status = _nfs4_proc_open_confirm(data);
2347 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
2348 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
2352 static int nfs4_recover_expired_lease(struct nfs_server *server)
2354 return nfs4_client_recover_expired_lease(server->nfs_client);
2359 * reclaim state on the server after a network partition.
2360 * Assumes caller holds the appropriate lock
2362 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2364 struct nfs4_opendata *opendata;
2367 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2368 NFS4_OPEN_CLAIM_FH);
2369 if (IS_ERR(opendata))
2370 return PTR_ERR(opendata);
2371 ret = nfs4_open_recover(opendata, state);
2373 d_drop(ctx->dentry);
2374 nfs4_opendata_put(opendata);
2378 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2380 struct nfs_server *server = NFS_SERVER(state->inode);
2381 struct nfs4_exception exception = { };
2385 err = _nfs4_open_expired(ctx, state);
2386 trace_nfs4_open_expired(ctx, 0, err);
2387 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2392 case -NFS4ERR_GRACE:
2393 case -NFS4ERR_DELAY:
2394 nfs4_handle_exception(server, err, &exception);
2397 } while (exception.retry);
2402 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2404 struct nfs_open_context *ctx;
2407 ctx = nfs4_state_find_open_context(state);
2410 ret = nfs4_do_open_expired(ctx, state);
2411 put_nfs_open_context(ctx);
2415 static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state,
2416 const nfs4_stateid *stateid)
2418 nfs_remove_bad_delegation(state->inode, stateid);
2419 write_seqlock(&state->seqlock);
2420 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2421 write_sequnlock(&state->seqlock);
2422 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2425 static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2427 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2428 nfs_finish_clear_delegation_stateid(state, NULL);
2431 static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2433 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2434 nfs40_clear_delegation_stateid(state);
2435 return nfs4_open_expired(sp, state);
2438 static int nfs40_test_and_free_expired_stateid(struct nfs_server *server,
2439 nfs4_stateid *stateid,
2440 struct rpc_cred *cred)
2442 return -NFS4ERR_BAD_STATEID;
2445 #if defined(CONFIG_NFS_V4_1)
2446 static int nfs41_test_and_free_expired_stateid(struct nfs_server *server,
2447 nfs4_stateid *stateid,
2448 struct rpc_cred *cred)
2452 switch (stateid->type) {
2455 case NFS4_INVALID_STATEID_TYPE:
2456 case NFS4_SPECIAL_STATEID_TYPE:
2457 return -NFS4ERR_BAD_STATEID;
2458 case NFS4_REVOKED_STATEID_TYPE:
2462 status = nfs41_test_stateid(server, stateid, cred);
2464 case -NFS4ERR_EXPIRED:
2465 case -NFS4ERR_ADMIN_REVOKED:
2466 case -NFS4ERR_DELEG_REVOKED:
2472 /* Ack the revoked state to the server */
2473 nfs41_free_stateid(server, stateid, cred, true);
2474 return -NFS4ERR_EXPIRED;
2477 static void nfs41_check_delegation_stateid(struct nfs4_state *state)
2479 struct nfs_server *server = NFS_SERVER(state->inode);
2480 nfs4_stateid stateid;
2481 struct nfs_delegation *delegation;
2482 struct rpc_cred *cred;
2485 /* Get the delegation credential for use by test/free_stateid */
2487 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2488 if (delegation == NULL) {
2493 nfs4_stateid_copy(&stateid, &delegation->stateid);
2494 if (test_bit(NFS_DELEGATION_REVOKED, &delegation->flags)) {
2496 nfs_finish_clear_delegation_stateid(state, &stateid);
2500 if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED, &delegation->flags)) {
2505 cred = get_rpccred(delegation->cred);
2507 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred);
2508 trace_nfs4_test_delegation_stateid(state, NULL, status);
2509 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID)
2510 nfs_finish_clear_delegation_stateid(state, &stateid);
2516 * nfs41_check_expired_locks - possibly free a lock stateid
2518 * @state: NFSv4 state for an inode
2520 * Returns NFS_OK if recovery for this stateid is now finished.
2521 * Otherwise a negative NFS4ERR value is returned.
2523 static int nfs41_check_expired_locks(struct nfs4_state *state)
2525 int status, ret = NFS_OK;
2526 struct nfs4_lock_state *lsp;
2527 struct nfs_server *server = NFS_SERVER(state->inode);
2529 if (!test_bit(LK_STATE_IN_USE, &state->flags))
2531 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
2532 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
2533 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
2535 status = nfs41_test_and_free_expired_stateid(server,
2538 trace_nfs4_test_lock_stateid(state, lsp, status);
2539 if (status == -NFS4ERR_EXPIRED ||
2540 status == -NFS4ERR_BAD_STATEID) {
2541 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
2542 if (!recover_lost_locks)
2543 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2544 } else if (status != NFS_OK) {
2555 * nfs41_check_open_stateid - possibly free an open stateid
2557 * @state: NFSv4 state for an inode
2559 * Returns NFS_OK if recovery for this stateid is now finished.
2560 * Otherwise a negative NFS4ERR value is returned.
2562 static int nfs41_check_open_stateid(struct nfs4_state *state)
2564 struct nfs_server *server = NFS_SERVER(state->inode);
2565 nfs4_stateid *stateid = &state->open_stateid;
2566 struct rpc_cred *cred = state->owner->so_cred;
2569 /* If a state reset has been done, test_stateid is unneeded */
2570 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2571 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2572 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2573 return -NFS4ERR_BAD_STATEID;
2575 status = nfs41_test_and_free_expired_stateid(server, stateid, cred);
2576 trace_nfs4_test_open_stateid(state, NULL, status);
2577 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) {
2578 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2579 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2580 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2581 clear_bit(NFS_OPEN_STATE, &state->flags);
2586 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2590 nfs41_check_delegation_stateid(state);
2591 status = nfs41_check_expired_locks(state);
2592 if (status != NFS_OK)
2594 status = nfs41_check_open_stateid(state);
2595 if (status != NFS_OK)
2596 status = nfs4_open_expired(sp, state);
2602 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2603 * fields corresponding to attributes that were used to store the verifier.
2604 * Make sure we clobber those fields in the later setattr call
2606 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2607 struct iattr *sattr, struct nfs4_label **label)
2609 const u32 *attrset = opendata->o_res.attrset;
2611 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2612 !(sattr->ia_valid & ATTR_ATIME_SET))
2613 sattr->ia_valid |= ATTR_ATIME;
2615 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2616 !(sattr->ia_valid & ATTR_MTIME_SET))
2617 sattr->ia_valid |= ATTR_MTIME;
2619 /* Except MODE, it seems harmless of setting twice. */
2620 if ((attrset[1] & FATTR4_WORD1_MODE))
2621 sattr->ia_valid &= ~ATTR_MODE;
2623 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2627 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2630 struct nfs_open_context *ctx)
2632 struct nfs4_state_owner *sp = opendata->owner;
2633 struct nfs_server *server = sp->so_server;
2634 struct dentry *dentry;
2635 struct nfs4_state *state;
2639 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2641 ret = _nfs4_proc_open(opendata);
2645 state = nfs4_opendata_to_nfs4_state(opendata);
2646 ret = PTR_ERR(state);
2649 if (server->caps & NFS_CAP_POSIX_LOCK)
2650 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2651 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK)
2652 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags);
2654 dentry = opendata->dentry;
2655 if (d_really_is_negative(dentry)) {
2656 struct dentry *alias;
2658 alias = d_exact_alias(dentry, state->inode);
2660 alias = d_splice_alias(igrab(state->inode), dentry);
2661 /* d_splice_alias() can't fail here - it's a non-directory */
2664 ctx->dentry = dentry = alias;
2666 nfs_set_verifier(dentry,
2667 nfs_save_change_attribute(d_inode(opendata->dir)));
2670 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2675 if (d_inode(dentry) == state->inode) {
2676 nfs_inode_attach_open_context(ctx);
2677 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2678 nfs4_schedule_stateid_recovery(server, state);
2685 * Returns a referenced nfs4_state
2687 static int _nfs4_do_open(struct inode *dir,
2688 struct nfs_open_context *ctx,
2690 struct iattr *sattr,
2691 struct nfs4_label *label,
2694 struct nfs4_state_owner *sp;
2695 struct nfs4_state *state = NULL;
2696 struct nfs_server *server = NFS_SERVER(dir);
2697 struct nfs4_opendata *opendata;
2698 struct dentry *dentry = ctx->dentry;
2699 struct rpc_cred *cred = ctx->cred;
2700 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2701 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
2702 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
2703 struct nfs4_label *olabel = NULL;
2706 /* Protect against reboot recovery conflicts */
2708 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2710 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2713 status = nfs4_recover_expired_lease(server);
2715 goto err_put_state_owner;
2716 if (d_really_is_positive(dentry))
2717 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
2719 if (d_really_is_positive(dentry))
2720 claim = NFS4_OPEN_CLAIM_FH;
2721 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
2722 label, claim, GFP_KERNEL);
2723 if (opendata == NULL)
2724 goto err_put_state_owner;
2727 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2728 if (IS_ERR(olabel)) {
2729 status = PTR_ERR(olabel);
2730 goto err_opendata_put;
2734 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2735 if (!opendata->f_attr.mdsthreshold) {
2736 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2737 if (!opendata->f_attr.mdsthreshold)
2738 goto err_free_label;
2740 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
2742 if (d_really_is_positive(dentry))
2743 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
2745 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
2747 goto err_free_label;
2750 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
2751 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
2752 nfs4_exclusive_attrset(opendata, sattr, &label);
2754 * send create attributes which was not set by open
2755 * with an extra setattr.
2757 if (sattr->ia_valid & NFS4_VALID_ATTRS) {
2758 nfs_fattr_init(opendata->o_res.f_attr);
2759 status = nfs4_do_setattr(state->inode, cred,
2760 opendata->o_res.f_attr, sattr,
2761 state, label, olabel);
2763 nfs_setattr_update_inode(state->inode, sattr,
2764 opendata->o_res.f_attr);
2765 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2769 if (opened && opendata->file_created)
2770 *opened |= FILE_CREATED;
2772 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
2773 *ctx_th = opendata->f_attr.mdsthreshold;
2774 opendata->f_attr.mdsthreshold = NULL;
2777 nfs4_label_free(olabel);
2779 nfs4_opendata_put(opendata);
2780 nfs4_put_state_owner(sp);
2783 nfs4_label_free(olabel);
2785 nfs4_opendata_put(opendata);
2786 err_put_state_owner:
2787 nfs4_put_state_owner(sp);
2793 static struct nfs4_state *nfs4_do_open(struct inode *dir,
2794 struct nfs_open_context *ctx,
2796 struct iattr *sattr,
2797 struct nfs4_label *label,
2800 struct nfs_server *server = NFS_SERVER(dir);
2801 struct nfs4_exception exception = { };
2802 struct nfs4_state *res;
2806 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
2808 trace_nfs4_open_file(ctx, flags, status);
2811 /* NOTE: BAD_SEQID means the server and client disagree about the
2812 * book-keeping w.r.t. state-changing operations
2813 * (OPEN/CLOSE/LOCK/LOCKU...)
2814 * It is actually a sign of a bug on the client or on the server.
2816 * If we receive a BAD_SEQID error in the particular case of
2817 * doing an OPEN, we assume that nfs_increment_open_seqid() will
2818 * have unhashed the old state_owner for us, and that we can
2819 * therefore safely retry using a new one. We should still warn
2820 * the user though...
2822 if (status == -NFS4ERR_BAD_SEQID) {
2823 pr_warn_ratelimited("NFS: v4 server %s "
2824 " returned a bad sequence-id error!\n",
2825 NFS_SERVER(dir)->nfs_client->cl_hostname);
2826 exception.retry = 1;
2830 * BAD_STATEID on OPEN means that the server cancelled our
2831 * state before it received the OPEN_CONFIRM.
2832 * Recover by retrying the request as per the discussion
2833 * on Page 181 of RFC3530.
2835 if (status == -NFS4ERR_BAD_STATEID) {
2836 exception.retry = 1;
2839 if (status == -EAGAIN) {
2840 /* We must have found a delegation */
2841 exception.retry = 1;
2844 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2846 res = ERR_PTR(nfs4_handle_exception(server,
2847 status, &exception));
2848 } while (exception.retry);
2852 static int _nfs4_do_setattr(struct inode *inode,
2853 struct nfs_setattrargs *arg,
2854 struct nfs_setattrres *res,
2855 struct rpc_cred *cred,
2856 struct nfs4_state *state)
2858 struct nfs_server *server = NFS_SERVER(inode);
2859 struct rpc_message msg = {
2860 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2865 struct rpc_cred *delegation_cred = NULL;
2866 unsigned long timestamp = jiffies;
2871 nfs_fattr_init(res->fattr);
2873 /* Servers should only apply open mode checks for file size changes */
2874 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false;
2875 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2877 if (nfs4_copy_delegation_stateid(inode, fmode, &arg->stateid, &delegation_cred)) {
2878 /* Use that stateid */
2879 } else if (truncate && state != NULL) {
2880 struct nfs_lockowner lockowner = {
2881 .l_owner = current->files,
2882 .l_pid = current->tgid,
2884 if (!nfs4_valid_open_stateid(state))
2886 if (nfs4_select_rw_stateid(state, FMODE_WRITE, &lockowner,
2887 &arg->stateid, &delegation_cred) == -EIO)
2890 nfs4_stateid_copy(&arg->stateid, &zero_stateid);
2891 if (delegation_cred)
2892 msg.rpc_cred = delegation_cred;
2894 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1);
2896 put_rpccred(delegation_cred);
2897 if (status == 0 && state != NULL)
2898 renew_lease(server, timestamp);
2899 trace_nfs4_setattr(inode, &arg->stateid, status);
2903 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2904 struct nfs_fattr *fattr, struct iattr *sattr,
2905 struct nfs4_state *state, struct nfs4_label *ilabel,
2906 struct nfs4_label *olabel)
2908 struct nfs_server *server = NFS_SERVER(inode);
2909 struct nfs_setattrargs arg = {
2910 .fh = NFS_FH(inode),
2913 .bitmask = server->attr_bitmask,
2916 struct nfs_setattrres res = {
2921 struct nfs4_exception exception = {
2924 .stateid = &arg.stateid,
2928 arg.bitmask = nfs4_bitmask(server, ilabel);
2930 arg.bitmask = nfs4_bitmask(server, olabel);
2933 err = _nfs4_do_setattr(inode, &arg, &res, cred, state);
2935 case -NFS4ERR_OPENMODE:
2936 if (!(sattr->ia_valid & ATTR_SIZE)) {
2937 pr_warn_once("NFSv4: server %s is incorrectly "
2938 "applying open mode checks to "
2939 "a SETATTR that is not "
2940 "changing file size.\n",
2941 server->nfs_client->cl_hostname);
2943 if (state && !(state->state & FMODE_WRITE)) {
2945 if (sattr->ia_valid & ATTR_OPEN)
2950 err = nfs4_handle_exception(server, err, &exception);
2951 } while (exception.retry);
2957 nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
2959 if (inode == NULL || !nfs_have_layout(inode))
2962 return pnfs_wait_on_layoutreturn(inode, task);
2965 struct nfs4_closedata {
2966 struct inode *inode;
2967 struct nfs4_state *state;
2968 struct nfs_closeargs arg;
2969 struct nfs_closeres res;
2970 struct nfs_fattr fattr;
2971 unsigned long timestamp;
2976 static void nfs4_free_closedata(void *data)
2978 struct nfs4_closedata *calldata = data;
2979 struct nfs4_state_owner *sp = calldata->state->owner;
2980 struct super_block *sb = calldata->state->inode->i_sb;
2983 pnfs_roc_release(calldata->state->inode);
2984 nfs4_put_open_state(calldata->state);
2985 nfs_free_seqid(calldata->arg.seqid);
2986 nfs4_put_state_owner(sp);
2987 nfs_sb_deactive(sb);
2991 static void nfs4_close_done(struct rpc_task *task, void *data)
2993 struct nfs4_closedata *calldata = data;
2994 struct nfs4_state *state = calldata->state;
2995 struct nfs_server *server = NFS_SERVER(calldata->inode);
2996 nfs4_stateid *res_stateid = NULL;
2998 dprintk("%s: begin!\n", __func__);
2999 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3001 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
3002 /* hmm. we are done with the inode, and in the process of freeing
3003 * the state_owner. we keep this around to process errors
3005 switch (task->tk_status) {
3007 res_stateid = &calldata->res.stateid;
3009 pnfs_roc_set_barrier(state->inode,
3010 calldata->roc_barrier);
3011 renew_lease(server, calldata->timestamp);
3013 case -NFS4ERR_ADMIN_REVOKED:
3014 case -NFS4ERR_STALE_STATEID:
3015 case -NFS4ERR_EXPIRED:
3016 nfs4_free_revoked_stateid(server,
3017 &calldata->arg.stateid,
3018 task->tk_msg.rpc_cred);
3019 case -NFS4ERR_OLD_STATEID:
3020 case -NFS4ERR_BAD_STATEID:
3021 if (!nfs4_stateid_match(&calldata->arg.stateid,
3022 &state->open_stateid)) {
3023 rpc_restart_call_prepare(task);
3026 if (calldata->arg.fmode == 0)
3029 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
3030 rpc_restart_call_prepare(task);
3034 nfs_clear_open_stateid(state, &calldata->arg.stateid,
3035 res_stateid, calldata->arg.fmode);
3037 nfs_release_seqid(calldata->arg.seqid);
3038 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
3039 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
3042 static void nfs4_close_prepare(struct rpc_task *task, void *data)
3044 struct nfs4_closedata *calldata = data;
3045 struct nfs4_state *state = calldata->state;
3046 struct inode *inode = calldata->inode;
3047 bool is_rdonly, is_wronly, is_rdwr;
3050 dprintk("%s: begin!\n", __func__);
3051 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3054 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
3055 spin_lock(&state->owner->so_lock);
3056 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
3057 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
3058 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
3059 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
3060 /* Calculate the change in open mode */
3061 calldata->arg.fmode = 0;
3062 if (state->n_rdwr == 0) {
3063 if (state->n_rdonly == 0)
3064 call_close |= is_rdonly;
3066 calldata->arg.fmode |= FMODE_READ;
3067 if (state->n_wronly == 0)
3068 call_close |= is_wronly;
3070 calldata->arg.fmode |= FMODE_WRITE;
3071 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
3072 call_close |= is_rdwr;
3074 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
3076 if (!nfs4_valid_open_stateid(state))
3078 spin_unlock(&state->owner->so_lock);
3081 /* Note: exit _without_ calling nfs4_close_done */
3085 if (nfs4_wait_on_layoutreturn(inode, task)) {
3086 nfs_release_seqid(calldata->arg.seqid);
3090 if (calldata->arg.fmode == 0)
3091 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3093 pnfs_roc_get_barrier(inode, &calldata->roc_barrier);
3095 calldata->arg.share_access =
3096 nfs4_map_atomic_open_share(NFS_SERVER(inode),
3097 calldata->arg.fmode, 0);
3099 nfs_fattr_init(calldata->res.fattr);
3100 calldata->timestamp = jiffies;
3101 if (nfs4_setup_sequence(NFS_SERVER(inode),
3102 &calldata->arg.seq_args,
3103 &calldata->res.seq_res,
3105 nfs_release_seqid(calldata->arg.seqid);
3106 dprintk("%s: done!\n", __func__);
3109 task->tk_action = NULL;
3111 nfs4_sequence_done(task, &calldata->res.seq_res);
3114 static const struct rpc_call_ops nfs4_close_ops = {
3115 .rpc_call_prepare = nfs4_close_prepare,
3116 .rpc_call_done = nfs4_close_done,
3117 .rpc_release = nfs4_free_closedata,
3120 static bool nfs4_roc(struct inode *inode)
3122 if (!nfs_have_layout(inode))
3124 return pnfs_roc(inode);
3128 * It is possible for data to be read/written from a mem-mapped file
3129 * after the sys_close call (which hits the vfs layer as a flush).
3130 * This means that we can't safely call nfsv4 close on a file until
3131 * the inode is cleared. This in turn means that we are not good
3132 * NFSv4 citizens - we do not indicate to the server to update the file's
3133 * share state even when we are done with one of the three share
3134 * stateid's in the inode.
3136 * NOTE: Caller must be holding the sp->so_owner semaphore!
3138 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
3140 struct nfs_server *server = NFS_SERVER(state->inode);
3141 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
3142 struct nfs4_closedata *calldata;
3143 struct nfs4_state_owner *sp = state->owner;
3144 struct rpc_task *task;
3145 struct rpc_message msg = {
3146 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
3147 .rpc_cred = state->owner->so_cred,
3149 struct rpc_task_setup task_setup_data = {
3150 .rpc_client = server->client,
3151 .rpc_message = &msg,
3152 .callback_ops = &nfs4_close_ops,
3153 .workqueue = nfsiod_workqueue,
3154 .flags = RPC_TASK_ASYNC,
3156 int status = -ENOMEM;
3158 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
3159 &task_setup_data.rpc_client, &msg);
3161 calldata = kzalloc(sizeof(*calldata), gfp_mask);
3162 if (calldata == NULL)
3164 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
3165 calldata->inode = state->inode;
3166 calldata->state = state;
3167 calldata->arg.fh = NFS_FH(state->inode);
3168 /* Serialization for the sequence id */
3169 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
3170 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
3171 if (IS_ERR(calldata->arg.seqid))
3172 goto out_free_calldata;
3173 calldata->arg.fmode = 0;
3174 calldata->arg.bitmask = server->cache_consistency_bitmask;
3175 calldata->res.fattr = &calldata->fattr;
3176 calldata->res.seqid = calldata->arg.seqid;
3177 calldata->res.server = server;
3178 calldata->roc = nfs4_roc(state->inode);
3179 nfs_sb_active(calldata->inode->i_sb);
3181 msg.rpc_argp = &calldata->arg;
3182 msg.rpc_resp = &calldata->res;
3183 task_setup_data.callback_data = calldata;
3184 task = rpc_run_task(&task_setup_data);
3186 return PTR_ERR(task);
3189 status = rpc_wait_for_completion_task(task);
3195 nfs4_put_open_state(state);
3196 nfs4_put_state_owner(sp);
3200 static struct inode *
3201 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3202 int open_flags, struct iattr *attr, int *opened)
3204 struct nfs4_state *state;
3205 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
3207 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
3209 /* Protect against concurrent sillydeletes */
3210 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
3212 nfs4_label_release_security(label);
3215 return ERR_CAST(state);
3216 return state->inode;
3219 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
3221 if (ctx->state == NULL)
3224 nfs4_close_sync(ctx->state, ctx->mode);
3226 nfs4_close_state(ctx->state, ctx->mode);
3229 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3230 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
3231 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
3233 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3235 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
3236 struct nfs4_server_caps_arg args = {
3240 struct nfs4_server_caps_res res = {};
3241 struct rpc_message msg = {
3242 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
3248 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3249 FATTR4_WORD0_FH_EXPIRE_TYPE |
3250 FATTR4_WORD0_LINK_SUPPORT |
3251 FATTR4_WORD0_SYMLINK_SUPPORT |
3252 FATTR4_WORD0_ACLSUPPORT;
3254 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3256 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3258 /* Sanity check the server answers */
3259 switch (minorversion) {
3261 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3262 res.attr_bitmask[2] = 0;
3265 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3268 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3270 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
3271 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3272 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3273 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3274 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
3275 NFS_CAP_CTIME|NFS_CAP_MTIME|
3276 NFS_CAP_SECURITY_LABEL);
3277 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3278 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3279 server->caps |= NFS_CAP_ACLS;
3280 if (res.has_links != 0)
3281 server->caps |= NFS_CAP_HARDLINKS;
3282 if (res.has_symlinks != 0)
3283 server->caps |= NFS_CAP_SYMLINKS;
3284 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3285 server->caps |= NFS_CAP_FILEID;
3286 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3287 server->caps |= NFS_CAP_MODE;
3288 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3289 server->caps |= NFS_CAP_NLINK;
3290 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3291 server->caps |= NFS_CAP_OWNER;
3292 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3293 server->caps |= NFS_CAP_OWNER_GROUP;
3294 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3295 server->caps |= NFS_CAP_ATIME;
3296 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3297 server->caps |= NFS_CAP_CTIME;
3298 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3299 server->caps |= NFS_CAP_MTIME;
3300 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
3301 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3302 server->caps |= NFS_CAP_SECURITY_LABEL;
3304 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3305 sizeof(server->attr_bitmask));
3306 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
3308 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3309 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3310 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
3311 server->cache_consistency_bitmask[2] = 0;
3312 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3313 sizeof(server->exclcreat_bitmask));
3314 server->acl_bitmask = res.acl_bitmask;
3315 server->fh_expire_type = res.fh_expire_type;
3321 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3323 struct nfs4_exception exception = { };
3326 err = nfs4_handle_exception(server,
3327 _nfs4_server_capabilities(server, fhandle),
3329 } while (exception.retry);
3333 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3334 struct nfs_fsinfo *info)
3337 struct nfs4_lookup_root_arg args = {
3340 struct nfs4_lookup_res res = {
3342 .fattr = info->fattr,
3345 struct rpc_message msg = {
3346 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3351 bitmask[0] = nfs4_fattr_bitmap[0];
3352 bitmask[1] = nfs4_fattr_bitmap[1];
3354 * Process the label in the upcoming getfattr
3356 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3358 nfs_fattr_init(info->fattr);
3359 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3362 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3363 struct nfs_fsinfo *info)
3365 struct nfs4_exception exception = { };
3368 err = _nfs4_lookup_root(server, fhandle, info);
3369 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
3372 case -NFS4ERR_WRONGSEC:
3375 err = nfs4_handle_exception(server, err, &exception);
3377 } while (exception.retry);
3382 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3383 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3385 struct rpc_auth_create_args auth_args = {
3386 .pseudoflavor = flavor,
3388 struct rpc_auth *auth;
3391 auth = rpcauth_create(&auth_args, server->client);
3396 ret = nfs4_lookup_root(server, fhandle, info);
3402 * Retry pseudoroot lookup with various security flavors. We do this when:
3404 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3405 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3407 * Returns zero on success, or a negative NFS4ERR value, or a
3408 * negative errno value.
3410 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3411 struct nfs_fsinfo *info)
3413 /* Per 3530bis 15.33.5 */
3414 static const rpc_authflavor_t flav_array[] = {
3418 RPC_AUTH_UNIX, /* courtesy */
3421 int status = -EPERM;
3424 if (server->auth_info.flavor_len > 0) {
3425 /* try each flavor specified by user */
3426 for (i = 0; i < server->auth_info.flavor_len; i++) {
3427 status = nfs4_lookup_root_sec(server, fhandle, info,
3428 server->auth_info.flavors[i]);
3429 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3434 /* no flavors specified by user, try default list */
3435 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3436 status = nfs4_lookup_root_sec(server, fhandle, info,
3438 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3445 * -EACCESS could mean that the user doesn't have correct permissions
3446 * to access the mount. It could also mean that we tried to mount
3447 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3448 * existing mount programs don't handle -EACCES very well so it should
3449 * be mapped to -EPERM instead.
3451 if (status == -EACCES)
3457 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3458 * @server: initialized nfs_server handle
3459 * @fhandle: we fill in the pseudo-fs root file handle
3460 * @info: we fill in an FSINFO struct
3461 * @auth_probe: probe the auth flavours
3463 * Returns zero on success, or a negative errno.
3465 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
3466 struct nfs_fsinfo *info,
3472 status = nfs4_lookup_root(server, fhandle, info);
3474 if (auth_probe || status == NFS4ERR_WRONGSEC)
3475 status = server->nfs_client->cl_mvops->find_root_sec(server,
3479 status = nfs4_server_capabilities(server, fhandle);
3481 status = nfs4_do_fsinfo(server, fhandle, info);
3483 return nfs4_map_errors(status);
3486 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3487 struct nfs_fsinfo *info)
3490 struct nfs_fattr *fattr = info->fattr;
3491 struct nfs4_label *label = NULL;
3493 error = nfs4_server_capabilities(server, mntfh);
3495 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3499 label = nfs4_label_alloc(server, GFP_KERNEL);
3501 return PTR_ERR(label);
3503 error = nfs4_proc_getattr(server, mntfh, fattr, label);
3505 dprintk("nfs4_get_root: getattr error = %d\n", -error);
3506 goto err_free_label;
3509 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3510 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3511 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3514 nfs4_label_free(label);
3520 * Get locations and (maybe) other attributes of a referral.
3521 * Note that we'll actually follow the referral later when
3522 * we detect fsid mismatch in inode revalidation
3524 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3525 const struct qstr *name, struct nfs_fattr *fattr,
3526 struct nfs_fh *fhandle)
3528 int status = -ENOMEM;
3529 struct page *page = NULL;
3530 struct nfs4_fs_locations *locations = NULL;
3532 page = alloc_page(GFP_KERNEL);
3535 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3536 if (locations == NULL)
3539 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
3544 * If the fsid didn't change, this is a migration event, not a
3545 * referral. Cause us to drop into the exception handler, which
3546 * will kick off migration recovery.
3548 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3549 dprintk("%s: server did not return a different fsid for"
3550 " a referral at %s\n", __func__, name->name);
3551 status = -NFS4ERR_MOVED;
3554 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3555 nfs_fixup_referral_attributes(&locations->fattr);
3557 /* replace the lookup nfs_fattr with the locations nfs_fattr */
3558 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
3559 memset(fhandle, 0, sizeof(struct nfs_fh));
3567 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3568 struct nfs_fattr *fattr, struct nfs4_label *label)
3570 struct nfs4_getattr_arg args = {
3572 .bitmask = server->attr_bitmask,
3574 struct nfs4_getattr_res res = {
3579 struct rpc_message msg = {
3580 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3585 args.bitmask = nfs4_bitmask(server, label);
3587 nfs_fattr_init(fattr);
3588 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3591 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3592 struct nfs_fattr *fattr, struct nfs4_label *label)
3594 struct nfs4_exception exception = { };
3597 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3598 trace_nfs4_getattr(server, fhandle, fattr, err);
3599 err = nfs4_handle_exception(server, err,
3601 } while (exception.retry);
3606 * The file is not closed if it is opened due to the a request to change
3607 * the size of the file. The open call will not be needed once the
3608 * VFS layer lookup-intents are implemented.
3610 * Close is called when the inode is destroyed.
3611 * If we haven't opened the file for O_WRONLY, we
3612 * need to in the size_change case to obtain a stateid.
3615 * Because OPEN is always done by name in nfsv4, it is
3616 * possible that we opened a different file by the same
3617 * name. We can recognize this race condition, but we
3618 * can't do anything about it besides returning an error.
3620 * This will be fixed with VFS changes (lookup-intent).
3623 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3624 struct iattr *sattr)
3626 struct inode *inode = d_inode(dentry);
3627 struct rpc_cred *cred = NULL;
3628 struct nfs4_state *state = NULL;
3629 struct nfs4_label *label = NULL;
3632 if (pnfs_ld_layoutret_on_setattr(inode) &&
3633 sattr->ia_valid & ATTR_SIZE &&
3634 sattr->ia_size < i_size_read(inode))
3635 pnfs_commit_and_return_layout(inode);
3637 nfs_fattr_init(fattr);
3639 /* Deal with open(O_TRUNC) */
3640 if (sattr->ia_valid & ATTR_OPEN)
3641 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
3643 /* Optimization: if the end result is no change, don't RPC */
3644 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
3647 /* Search for an existing open(O_WRITE) file */
3648 if (sattr->ia_valid & ATTR_FILE) {
3649 struct nfs_open_context *ctx;
3651 ctx = nfs_file_open_context(sattr->ia_file);
3658 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3660 return PTR_ERR(label);
3662 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
3664 nfs_setattr_update_inode(inode, sattr, fattr);
3665 nfs_setsecurity(inode, fattr, label);
3667 nfs4_label_free(label);
3671 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3672 const struct qstr *name, struct nfs_fh *fhandle,
3673 struct nfs_fattr *fattr, struct nfs4_label *label)
3675 struct nfs_server *server = NFS_SERVER(dir);
3677 struct nfs4_lookup_arg args = {
3678 .bitmask = server->attr_bitmask,
3679 .dir_fh = NFS_FH(dir),
3682 struct nfs4_lookup_res res = {
3688 struct rpc_message msg = {
3689 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3694 args.bitmask = nfs4_bitmask(server, label);
3696 nfs_fattr_init(fattr);
3698 dprintk("NFS call lookup %s\n", name->name);
3699 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
3700 dprintk("NFS reply lookup: %d\n", status);
3704 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
3706 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
3707 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
3708 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3712 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3713 const struct qstr *name, struct nfs_fh *fhandle,
3714 struct nfs_fattr *fattr, struct nfs4_label *label)
3716 struct nfs4_exception exception = { };
3717 struct rpc_clnt *client = *clnt;
3720 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
3721 trace_nfs4_lookup(dir, name, err);
3723 case -NFS4ERR_BADNAME:
3726 case -NFS4ERR_MOVED:
3727 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
3728 if (err == -NFS4ERR_MOVED)
3729 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3731 case -NFS4ERR_WRONGSEC:
3733 if (client != *clnt)
3735 client = nfs4_negotiate_security(client, dir, name);
3737 return PTR_ERR(client);
3739 exception.retry = 1;
3742 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3744 } while (exception.retry);
3749 else if (client != *clnt)
3750 rpc_shutdown_client(client);
3755 static int nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
3756 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3757 struct nfs4_label *label)
3760 struct rpc_clnt *client = NFS_CLIENT(dir);
3762 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
3763 if (client != NFS_CLIENT(dir)) {
3764 rpc_shutdown_client(client);
3765 nfs_fixup_secinfo_attributes(fattr);
3771 nfs4_proc_lookup_mountpoint(struct inode *dir, const struct qstr *name,
3772 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3774 struct rpc_clnt *client = NFS_CLIENT(dir);
3777 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
3779 return ERR_PTR(status);
3780 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
3783 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3785 struct nfs_server *server = NFS_SERVER(inode);
3786 struct nfs4_accessargs args = {
3787 .fh = NFS_FH(inode),
3788 .bitmask = server->cache_consistency_bitmask,
3790 struct nfs4_accessres res = {
3793 struct rpc_message msg = {
3794 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3797 .rpc_cred = entry->cred,
3799 int mode = entry->mask;
3803 * Determine which access bits we want to ask for...
3805 if (mode & MAY_READ)
3806 args.access |= NFS4_ACCESS_READ;
3807 if (S_ISDIR(inode->i_mode)) {
3808 if (mode & MAY_WRITE)
3809 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3810 if (mode & MAY_EXEC)
3811 args.access |= NFS4_ACCESS_LOOKUP;
3813 if (mode & MAY_WRITE)
3814 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3815 if (mode & MAY_EXEC)
3816 args.access |= NFS4_ACCESS_EXECUTE;
3819 res.fattr = nfs_alloc_fattr();
3820 if (res.fattr == NULL)
3823 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3825 nfs_access_set_mask(entry, res.access);
3826 nfs_refresh_inode(inode, res.fattr);
3828 nfs_free_fattr(res.fattr);
3832 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3834 struct nfs4_exception exception = { };
3837 err = _nfs4_proc_access(inode, entry);
3838 trace_nfs4_access(inode, err);
3839 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3841 } while (exception.retry);
3846 * TODO: For the time being, we don't try to get any attributes
3847 * along with any of the zero-copy operations READ, READDIR,
3850 * In the case of the first three, we want to put the GETATTR
3851 * after the read-type operation -- this is because it is hard
3852 * to predict the length of a GETATTR response in v4, and thus
3853 * align the READ data correctly. This means that the GETATTR
3854 * may end up partially falling into the page cache, and we should
3855 * shift it into the 'tail' of the xdr_buf before processing.
3856 * To do this efficiently, we need to know the total length
3857 * of data received, which doesn't seem to be available outside
3860 * In the case of WRITE, we also want to put the GETATTR after
3861 * the operation -- in this case because we want to make sure
3862 * we get the post-operation mtime and size.
3864 * Both of these changes to the XDR layer would in fact be quite
3865 * minor, but I decided to leave them for a subsequent patch.
3867 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3868 unsigned int pgbase, unsigned int pglen)
3870 struct nfs4_readlink args = {
3871 .fh = NFS_FH(inode),
3876 struct nfs4_readlink_res res;
3877 struct rpc_message msg = {
3878 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3883 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
3886 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3887 unsigned int pgbase, unsigned int pglen)
3889 struct nfs4_exception exception = { };
3892 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3893 trace_nfs4_readlink(inode, err);
3894 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3896 } while (exception.retry);
3901 * This is just for mknod. open(O_CREAT) will always do ->open_context().
3904 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
3907 struct nfs4_label l, *ilabel = NULL;
3908 struct nfs_open_context *ctx;
3909 struct nfs4_state *state;
3912 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3914 return PTR_ERR(ctx);
3916 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3918 sattr->ia_mode &= ~current_umask();
3919 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
3920 if (IS_ERR(state)) {
3921 status = PTR_ERR(state);
3925 nfs4_label_release_security(ilabel);
3926 put_nfs_open_context(ctx);
3930 static int _nfs4_proc_remove(struct inode *dir, const struct qstr *name)
3932 struct nfs_server *server = NFS_SERVER(dir);
3933 struct nfs_removeargs args = {
3937 struct nfs_removeres res = {
3940 struct rpc_message msg = {
3941 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3947 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
3949 update_changeattr(dir, &res.cinfo);
3953 static int nfs4_proc_remove(struct inode *dir, const struct qstr *name)
3955 struct nfs4_exception exception = { };
3958 err = _nfs4_proc_remove(dir, name);
3959 trace_nfs4_remove(dir, name, err);
3960 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3962 } while (exception.retry);
3966 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
3968 struct nfs_server *server = NFS_SERVER(dir);
3969 struct nfs_removeargs *args = msg->rpc_argp;
3970 struct nfs_removeres *res = msg->rpc_resp;
3972 res->server = server;
3973 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
3974 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
3976 nfs_fattr_init(res->dir_attr);
3979 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3981 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb),
3982 &data->args.seq_args,
3987 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
3989 struct nfs_unlinkdata *data = task->tk_calldata;
3990 struct nfs_removeres *res = &data->res;
3992 if (!nfs4_sequence_done(task, &res->seq_res))
3994 if (nfs4_async_handle_error(task, res->server, NULL,
3995 &data->timeout) == -EAGAIN)
3997 update_changeattr(dir, &res->cinfo);
4001 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
4003 struct nfs_server *server = NFS_SERVER(dir);
4004 struct nfs_renameargs *arg = msg->rpc_argp;
4005 struct nfs_renameres *res = msg->rpc_resp;
4007 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
4008 res->server = server;
4009 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
4012 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
4014 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
4015 &data->args.seq_args,
4020 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
4021 struct inode *new_dir)
4023 struct nfs_renamedata *data = task->tk_calldata;
4024 struct nfs_renameres *res = &data->res;
4026 if (!nfs4_sequence_done(task, &res->seq_res))
4028 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
4031 update_changeattr(old_dir, &res->old_cinfo);
4032 update_changeattr(new_dir, &res->new_cinfo);
4036 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
4038 struct nfs_server *server = NFS_SERVER(inode);
4039 struct nfs4_link_arg arg = {
4040 .fh = NFS_FH(inode),
4041 .dir_fh = NFS_FH(dir),
4043 .bitmask = server->attr_bitmask,
4045 struct nfs4_link_res res = {
4049 struct rpc_message msg = {
4050 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
4054 int status = -ENOMEM;
4056 res.fattr = nfs_alloc_fattr();
4057 if (res.fattr == NULL)
4060 res.label = nfs4_label_alloc(server, GFP_KERNEL);
4061 if (IS_ERR(res.label)) {
4062 status = PTR_ERR(res.label);
4065 arg.bitmask = nfs4_bitmask(server, res.label);
4067 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4069 update_changeattr(dir, &res.cinfo);
4070 status = nfs_post_op_update_inode(inode, res.fattr);
4072 nfs_setsecurity(inode, res.fattr, res.label);
4076 nfs4_label_free(res.label);
4079 nfs_free_fattr(res.fattr);
4083 static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
4085 struct nfs4_exception exception = { };
4088 err = nfs4_handle_exception(NFS_SERVER(inode),
4089 _nfs4_proc_link(inode, dir, name),
4091 } while (exception.retry);
4095 struct nfs4_createdata {
4096 struct rpc_message msg;
4097 struct nfs4_create_arg arg;
4098 struct nfs4_create_res res;
4100 struct nfs_fattr fattr;
4101 struct nfs4_label *label;
4104 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
4105 const struct qstr *name, struct iattr *sattr, u32 ftype)
4107 struct nfs4_createdata *data;
4109 data = kzalloc(sizeof(*data), GFP_KERNEL);
4111 struct nfs_server *server = NFS_SERVER(dir);
4113 data->label = nfs4_label_alloc(server, GFP_KERNEL);
4114 if (IS_ERR(data->label))
4117 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
4118 data->msg.rpc_argp = &data->arg;
4119 data->msg.rpc_resp = &data->res;
4120 data->arg.dir_fh = NFS_FH(dir);
4121 data->arg.server = server;
4122 data->arg.name = name;
4123 data->arg.attrs = sattr;
4124 data->arg.ftype = ftype;
4125 data->arg.bitmask = nfs4_bitmask(server, data->label);
4126 data->res.server = server;
4127 data->res.fh = &data->fh;
4128 data->res.fattr = &data->fattr;
4129 data->res.label = data->label;
4130 nfs_fattr_init(data->res.fattr);
4138 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
4140 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
4141 &data->arg.seq_args, &data->res.seq_res, 1);
4143 update_changeattr(dir, &data->res.dir_cinfo);
4144 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
4149 static void nfs4_free_createdata(struct nfs4_createdata *data)
4151 nfs4_label_free(data->label);
4155 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
4156 struct page *page, unsigned int len, struct iattr *sattr,
4157 struct nfs4_label *label)
4159 struct nfs4_createdata *data;
4160 int status = -ENAMETOOLONG;
4162 if (len > NFS4_MAXPATHLEN)
4166 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
4170 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
4171 data->arg.u.symlink.pages = &page;
4172 data->arg.u.symlink.len = len;
4173 data->arg.label = label;
4175 status = nfs4_do_create(dir, dentry, data);
4177 nfs4_free_createdata(data);
4182 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
4183 struct page *page, unsigned int len, struct iattr *sattr)
4185 struct nfs4_exception exception = { };
4186 struct nfs4_label l, *label = NULL;
4189 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4192 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
4193 trace_nfs4_symlink(dir, &dentry->d_name, err);
4194 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4196 } while (exception.retry);
4198 nfs4_label_release_security(label);
4202 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4203 struct iattr *sattr, struct nfs4_label *label)
4205 struct nfs4_createdata *data;
4206 int status = -ENOMEM;
4208 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4212 data->arg.label = label;
4213 status = nfs4_do_create(dir, dentry, data);
4215 nfs4_free_createdata(data);
4220 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4221 struct iattr *sattr)
4223 struct nfs4_exception exception = { };
4224 struct nfs4_label l, *label = NULL;
4227 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4229 sattr->ia_mode &= ~current_umask();
4231 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4232 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4233 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4235 } while (exception.retry);
4236 nfs4_label_release_security(label);
4241 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
4242 u64 cookie, struct page **pages, unsigned int count, int plus)
4244 struct inode *dir = d_inode(dentry);
4245 struct nfs4_readdir_arg args = {
4250 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
4253 struct nfs4_readdir_res res;
4254 struct rpc_message msg = {
4255 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4262 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4264 (unsigned long long)cookie);
4265 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
4266 res.pgbase = args.pgbase;
4267 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4269 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
4270 status += args.pgbase;
4273 nfs_invalidate_atime(dir);
4275 dprintk("%s: returns %d\n", __func__, status);
4279 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
4280 u64 cookie, struct page **pages, unsigned int count, int plus)
4282 struct nfs4_exception exception = { };
4285 err = _nfs4_proc_readdir(dentry, cred, cookie,
4286 pages, count, plus);
4287 trace_nfs4_readdir(d_inode(dentry), err);
4288 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
4290 } while (exception.retry);
4294 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4295 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
4297 struct nfs4_createdata *data;
4298 int mode = sattr->ia_mode;
4299 int status = -ENOMEM;
4301 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4306 data->arg.ftype = NF4FIFO;
4307 else if (S_ISBLK(mode)) {
4308 data->arg.ftype = NF4BLK;
4309 data->arg.u.device.specdata1 = MAJOR(rdev);
4310 data->arg.u.device.specdata2 = MINOR(rdev);
4312 else if (S_ISCHR(mode)) {
4313 data->arg.ftype = NF4CHR;
4314 data->arg.u.device.specdata1 = MAJOR(rdev);
4315 data->arg.u.device.specdata2 = MINOR(rdev);
4316 } else if (!S_ISSOCK(mode)) {
4321 data->arg.label = label;
4322 status = nfs4_do_create(dir, dentry, data);
4324 nfs4_free_createdata(data);
4329 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4330 struct iattr *sattr, dev_t rdev)
4332 struct nfs4_exception exception = { };
4333 struct nfs4_label l, *label = NULL;
4336 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4338 sattr->ia_mode &= ~current_umask();
4340 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4341 trace_nfs4_mknod(dir, &dentry->d_name, err);
4342 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4344 } while (exception.retry);
4346 nfs4_label_release_security(label);
4351 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4352 struct nfs_fsstat *fsstat)
4354 struct nfs4_statfs_arg args = {
4356 .bitmask = server->attr_bitmask,
4358 struct nfs4_statfs_res res = {
4361 struct rpc_message msg = {
4362 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4367 nfs_fattr_init(fsstat->fattr);
4368 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4371 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4373 struct nfs4_exception exception = { };
4376 err = nfs4_handle_exception(server,
4377 _nfs4_proc_statfs(server, fhandle, fsstat),
4379 } while (exception.retry);
4383 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4384 struct nfs_fsinfo *fsinfo)
4386 struct nfs4_fsinfo_arg args = {
4388 .bitmask = server->attr_bitmask,
4390 struct nfs4_fsinfo_res res = {
4393 struct rpc_message msg = {
4394 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4399 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4402 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4404 struct nfs4_exception exception = { };
4405 unsigned long now = jiffies;
4409 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
4410 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
4412 nfs4_set_lease_period(server->nfs_client,
4413 fsinfo->lease_time * HZ,
4417 err = nfs4_handle_exception(server, err, &exception);
4418 } while (exception.retry);
4422 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4426 nfs_fattr_init(fsinfo->fattr);
4427 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
4429 /* block layout checks this! */
4430 server->pnfs_blksize = fsinfo->blksize;
4431 set_pnfs_layoutdriver(server, fhandle, fsinfo);
4437 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4438 struct nfs_pathconf *pathconf)
4440 struct nfs4_pathconf_arg args = {
4442 .bitmask = server->attr_bitmask,
4444 struct nfs4_pathconf_res res = {
4445 .pathconf = pathconf,
4447 struct rpc_message msg = {
4448 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4453 /* None of the pathconf attributes are mandatory to implement */
4454 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4455 memset(pathconf, 0, sizeof(*pathconf));
4459 nfs_fattr_init(pathconf->fattr);
4460 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4463 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4464 struct nfs_pathconf *pathconf)
4466 struct nfs4_exception exception = { };
4470 err = nfs4_handle_exception(server,
4471 _nfs4_proc_pathconf(server, fhandle, pathconf),
4473 } while (exception.retry);
4477 int nfs4_set_rw_stateid(nfs4_stateid *stateid,
4478 const struct nfs_open_context *ctx,
4479 const struct nfs_lock_context *l_ctx,
4482 const struct nfs_lockowner *lockowner = NULL;
4485 lockowner = &l_ctx->lockowner;
4486 return nfs4_select_rw_stateid(ctx->state, fmode, lockowner, stateid, NULL);
4488 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4490 static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4491 const struct nfs_open_context *ctx,
4492 const struct nfs_lock_context *l_ctx,
4495 nfs4_stateid current_stateid;
4497 /* If the current stateid represents a lost lock, then exit */
4498 if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode) == -EIO)
4500 return nfs4_stateid_match(stateid, ¤t_stateid);
4503 static bool nfs4_error_stateid_expired(int err)
4506 case -NFS4ERR_DELEG_REVOKED:
4507 case -NFS4ERR_ADMIN_REVOKED:
4508 case -NFS4ERR_BAD_STATEID:
4509 case -NFS4ERR_STALE_STATEID:
4510 case -NFS4ERR_OLD_STATEID:
4511 case -NFS4ERR_OPENMODE:
4512 case -NFS4ERR_EXPIRED:
4518 void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
4520 nfs_invalidate_atime(hdr->inode);
4523 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
4525 struct nfs_server *server = NFS_SERVER(hdr->inode);
4527 trace_nfs4_read(hdr, task->tk_status);
4528 if (nfs4_async_handle_error(task, server,
4529 hdr->args.context->state,
4531 rpc_restart_call_prepare(task);
4535 __nfs4_read_done_cb(hdr);
4536 if (task->tk_status > 0)
4537 renew_lease(server, hdr->timestamp);
4541 static bool nfs4_read_stateid_changed(struct rpc_task *task,
4542 struct nfs_pgio_args *args)
4545 if (!nfs4_error_stateid_expired(task->tk_status) ||
4546 nfs4_stateid_is_current(&args->stateid,
4551 rpc_restart_call_prepare(task);
4555 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4558 dprintk("--> %s\n", __func__);
4560 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4562 if (nfs4_read_stateid_changed(task, &hdr->args))
4564 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4565 nfs4_read_done_cb(task, hdr);
4568 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4569 struct rpc_message *msg)
4571 hdr->timestamp = jiffies;
4572 if (!hdr->pgio_done_cb)
4573 hdr->pgio_done_cb = nfs4_read_done_cb;
4574 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
4575 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
4578 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4579 struct nfs_pgio_header *hdr)
4581 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4582 &hdr->args.seq_args,
4586 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4587 hdr->args.lock_context,
4588 hdr->rw_ops->rw_mode) == -EIO)
4590 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
4595 static int nfs4_write_done_cb(struct rpc_task *task,
4596 struct nfs_pgio_header *hdr)
4598 struct inode *inode = hdr->inode;
4600 trace_nfs4_write(hdr, task->tk_status);
4601 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4602 hdr->args.context->state,
4604 rpc_restart_call_prepare(task);
4607 if (task->tk_status >= 0) {
4608 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4609 nfs_writeback_update_inode(hdr);
4614 static bool nfs4_write_stateid_changed(struct rpc_task *task,
4615 struct nfs_pgio_args *args)
4618 if (!nfs4_error_stateid_expired(task->tk_status) ||
4619 nfs4_stateid_is_current(&args->stateid,
4624 rpc_restart_call_prepare(task);
4628 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4630 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4632 if (nfs4_write_stateid_changed(task, &hdr->args))
4634 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4635 nfs4_write_done_cb(task, hdr);
4639 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
4641 /* Don't request attributes for pNFS or O_DIRECT writes */
4642 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
4644 /* Otherwise, request attributes if and only if we don't hold
4647 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
4650 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4651 struct rpc_message *msg)
4653 struct nfs_server *server = NFS_SERVER(hdr->inode);
4655 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4656 hdr->args.bitmask = NULL;
4657 hdr->res.fattr = NULL;
4659 hdr->args.bitmask = server->cache_consistency_bitmask;
4661 if (!hdr->pgio_done_cb)
4662 hdr->pgio_done_cb = nfs4_write_done_cb;
4663 hdr->res.server = server;
4664 hdr->timestamp = jiffies;
4666 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
4667 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
4670 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
4672 nfs4_setup_sequence(NFS_SERVER(data->inode),
4673 &data->args.seq_args,
4678 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
4680 struct inode *inode = data->inode;
4682 trace_nfs4_commit(data, task->tk_status);
4683 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4684 NULL, NULL) == -EAGAIN) {
4685 rpc_restart_call_prepare(task);
4691 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
4693 if (!nfs4_sequence_done(task, &data->res.seq_res))
4695 return data->commit_done_cb(task, data);
4698 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
4700 struct nfs_server *server = NFS_SERVER(data->inode);
4702 if (data->commit_done_cb == NULL)
4703 data->commit_done_cb = nfs4_commit_done_cb;
4704 data->res.server = server;
4705 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
4706 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4709 struct nfs4_renewdata {
4710 struct nfs_client *client;
4711 unsigned long timestamp;
4715 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4716 * standalone procedure for queueing an asynchronous RENEW.
4718 static void nfs4_renew_release(void *calldata)
4720 struct nfs4_renewdata *data = calldata;
4721 struct nfs_client *clp = data->client;
4723 if (atomic_read(&clp->cl_count) > 1)
4724 nfs4_schedule_state_renewal(clp);
4725 nfs_put_client(clp);
4729 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
4731 struct nfs4_renewdata *data = calldata;
4732 struct nfs_client *clp = data->client;
4733 unsigned long timestamp = data->timestamp;
4735 trace_nfs4_renew_async(clp, task->tk_status);
4736 switch (task->tk_status) {
4739 case -NFS4ERR_LEASE_MOVED:
4740 nfs4_schedule_lease_moved_recovery(clp);
4743 /* Unless we're shutting down, schedule state recovery! */
4744 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4746 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
4747 nfs4_schedule_lease_recovery(clp);
4750 nfs4_schedule_path_down_recovery(clp);
4752 do_renew_lease(clp, timestamp);
4755 static const struct rpc_call_ops nfs4_renew_ops = {
4756 .rpc_call_done = nfs4_renew_done,
4757 .rpc_release = nfs4_renew_release,
4760 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
4762 struct rpc_message msg = {
4763 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4767 struct nfs4_renewdata *data;
4769 if (renew_flags == 0)
4771 if (!atomic_inc_not_zero(&clp->cl_count))
4773 data = kmalloc(sizeof(*data), GFP_NOFS);
4777 data->timestamp = jiffies;
4778 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
4779 &nfs4_renew_ops, data);
4782 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
4784 struct rpc_message msg = {
4785 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4789 unsigned long now = jiffies;
4792 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4795 do_renew_lease(clp, now);
4799 static inline int nfs4_server_supports_acls(struct nfs_server *server)
4801 return server->caps & NFS_CAP_ACLS;
4804 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4805 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
4808 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
4810 static int buf_to_pages_noslab(const void *buf, size_t buflen,
4811 struct page **pages)
4813 struct page *newpage, **spages;
4819 len = min_t(size_t, PAGE_SIZE, buflen);
4820 newpage = alloc_page(GFP_KERNEL);
4822 if (newpage == NULL)
4824 memcpy(page_address(newpage), buf, len);
4829 } while (buflen != 0);
4835 __free_page(spages[rc-1]);
4839 struct nfs4_cached_acl {
4845 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4847 struct nfs_inode *nfsi = NFS_I(inode);
4849 spin_lock(&inode->i_lock);
4850 kfree(nfsi->nfs4_acl);
4851 nfsi->nfs4_acl = acl;
4852 spin_unlock(&inode->i_lock);
4855 static void nfs4_zap_acl_attr(struct inode *inode)
4857 nfs4_set_cached_acl(inode, NULL);
4860 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4862 struct nfs_inode *nfsi = NFS_I(inode);
4863 struct nfs4_cached_acl *acl;
4866 spin_lock(&inode->i_lock);
4867 acl = nfsi->nfs4_acl;
4870 if (buf == NULL) /* user is just asking for length */
4872 if (acl->cached == 0)
4874 ret = -ERANGE; /* see getxattr(2) man page */
4875 if (acl->len > buflen)
4877 memcpy(buf, acl->data, acl->len);
4881 spin_unlock(&inode->i_lock);
4885 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
4887 struct nfs4_cached_acl *acl;
4888 size_t buflen = sizeof(*acl) + acl_len;
4890 if (buflen <= PAGE_SIZE) {
4891 acl = kmalloc(buflen, GFP_KERNEL);
4895 _copy_from_pages(acl->data, pages, pgbase, acl_len);
4897 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4904 nfs4_set_cached_acl(inode, acl);
4908 * The getxattr API returns the required buffer length when called with a
4909 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4910 * the required buf. On a NULL buf, we send a page of data to the server
4911 * guessing that the ACL request can be serviced by a page. If so, we cache
4912 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4913 * the cache. If not so, we throw away the page, and cache the required
4914 * length. The next getxattr call will then produce another round trip to
4915 * the server, this time with the input buf of the required size.
4917 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4919 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
4920 struct nfs_getaclargs args = {
4921 .fh = NFS_FH(inode),
4925 struct nfs_getaclres res = {
4928 struct rpc_message msg = {
4929 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4933 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4934 int ret = -ENOMEM, i;
4936 /* As long as we're doing a round trip to the server anyway,
4937 * let's be prepared for a page of acl data. */
4940 if (npages > ARRAY_SIZE(pages))
4943 for (i = 0; i < npages; i++) {
4944 pages[i] = alloc_page(GFP_KERNEL);
4949 /* for decoding across pages */
4950 res.acl_scratch = alloc_page(GFP_KERNEL);
4951 if (!res.acl_scratch)
4954 args.acl_len = npages * PAGE_SIZE;
4956 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
4957 __func__, buf, buflen, npages, args.acl_len);
4958 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4959 &msg, &args.seq_args, &res.seq_res, 0);
4963 /* Handle the case where the passed-in buffer is too short */
4964 if (res.acl_flags & NFS4_ACL_TRUNC) {
4965 /* Did the user only issue a request for the acl length? */
4971 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
4973 if (res.acl_len > buflen) {
4977 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
4982 for (i = 0; i < npages; i++)
4984 __free_page(pages[i]);
4985 if (res.acl_scratch)
4986 __free_page(res.acl_scratch);
4990 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4992 struct nfs4_exception exception = { };
4995 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4996 trace_nfs4_get_acl(inode, ret);
4999 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
5000 } while (exception.retry);
5004 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
5006 struct nfs_server *server = NFS_SERVER(inode);
5009 if (!nfs4_server_supports_acls(server))
5011 ret = nfs_revalidate_inode(server, inode);
5014 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
5015 nfs_zap_acl_cache(inode);
5016 ret = nfs4_read_cached_acl(inode, buf, buflen);
5018 /* -ENOENT is returned if there is no ACL or if there is an ACL
5019 * but no cached acl data, just the acl length */
5021 return nfs4_get_acl_uncached(inode, buf, buflen);
5024 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5026 struct nfs_server *server = NFS_SERVER(inode);
5027 struct page *pages[NFS4ACL_MAXPAGES];
5028 struct nfs_setaclargs arg = {
5029 .fh = NFS_FH(inode),
5033 struct nfs_setaclres res;
5034 struct rpc_message msg = {
5035 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
5039 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
5042 if (!nfs4_server_supports_acls(server))
5044 if (npages > ARRAY_SIZE(pages))
5046 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
5049 nfs4_inode_return_delegation(inode);
5050 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5053 * Free each page after tx, so the only ref left is
5054 * held by the network stack
5057 put_page(pages[i-1]);
5060 * Acl update can result in inode attribute update.
5061 * so mark the attribute cache invalid.
5063 spin_lock(&inode->i_lock);
5064 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
5065 spin_unlock(&inode->i_lock);
5066 nfs_access_zap_cache(inode);
5067 nfs_zap_acl_cache(inode);
5071 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5073 struct nfs4_exception exception = { };
5076 err = __nfs4_proc_set_acl(inode, buf, buflen);
5077 trace_nfs4_set_acl(inode, err);
5078 err = nfs4_handle_exception(NFS_SERVER(inode), err,
5080 } while (exception.retry);
5084 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
5085 static int _nfs4_get_security_label(struct inode *inode, void *buf,
5088 struct nfs_server *server = NFS_SERVER(inode);
5089 struct nfs_fattr fattr;
5090 struct nfs4_label label = {0, 0, buflen, buf};
5092 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
5093 struct nfs4_getattr_arg arg = {
5094 .fh = NFS_FH(inode),
5097 struct nfs4_getattr_res res = {
5102 struct rpc_message msg = {
5103 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
5109 nfs_fattr_init(&fattr);
5111 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
5114 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
5116 if (buflen < label.len)
5121 static int nfs4_get_security_label(struct inode *inode, void *buf,
5124 struct nfs4_exception exception = { };
5127 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5131 err = _nfs4_get_security_label(inode, buf, buflen);
5132 trace_nfs4_get_security_label(inode, err);
5133 err = nfs4_handle_exception(NFS_SERVER(inode), err,
5135 } while (exception.retry);
5139 static int _nfs4_do_set_security_label(struct inode *inode,
5140 struct nfs4_label *ilabel,
5141 struct nfs_fattr *fattr,
5142 struct nfs4_label *olabel)
5145 struct iattr sattr = {0};
5146 struct nfs_server *server = NFS_SERVER(inode);
5147 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
5148 struct nfs_setattrargs arg = {
5149 .fh = NFS_FH(inode),
5155 struct nfs_setattrres res = {
5160 struct rpc_message msg = {
5161 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
5167 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
5169 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5171 dprintk("%s failed: %d\n", __func__, status);
5176 static int nfs4_do_set_security_label(struct inode *inode,
5177 struct nfs4_label *ilabel,
5178 struct nfs_fattr *fattr,
5179 struct nfs4_label *olabel)
5181 struct nfs4_exception exception = { };
5185 err = _nfs4_do_set_security_label(inode, ilabel,
5187 trace_nfs4_set_security_label(inode, err);
5188 err = nfs4_handle_exception(NFS_SERVER(inode), err,
5190 } while (exception.retry);
5195 nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen)
5197 struct nfs4_label ilabel, *olabel = NULL;
5198 struct nfs_fattr fattr;
5199 struct rpc_cred *cred;
5202 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5205 nfs_fattr_init(&fattr);
5209 ilabel.label = (char *)buf;
5210 ilabel.len = buflen;
5212 cred = rpc_lookup_cred();
5214 return PTR_ERR(cred);
5216 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5217 if (IS_ERR(olabel)) {
5218 status = -PTR_ERR(olabel);
5222 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5224 nfs_setsecurity(inode, &fattr, olabel);
5226 nfs4_label_free(olabel);
5231 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */
5234 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5235 nfs4_verifier *bootverf)
5239 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5240 /* An impossible timestamp guarantees this value
5241 * will never match a generated boot time. */
5243 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
5245 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
5246 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
5247 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
5249 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5253 nfs4_init_nonuniform_client_string(struct nfs_client *clp)
5258 if (clp->cl_owner_id != NULL)
5262 len = 14 + strlen(clp->cl_ipaddr) + 1 +
5263 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5265 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5269 if (len > NFS4_OPAQUE_LIMIT + 1)
5273 * Since this string is allocated at mount time, and held until the
5274 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5275 * about a memory-reclaim deadlock.
5277 str = kmalloc(len, GFP_KERNEL);
5282 scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
5284 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5285 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
5288 clp->cl_owner_id = str;
5293 nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5298 len = 10 + 10 + 1 + 10 + 1 +
5299 strlen(nfs4_client_id_uniquifier) + 1 +
5300 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5302 if (len > NFS4_OPAQUE_LIMIT + 1)
5306 * Since this string is allocated at mount time, and held until the
5307 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5308 * about a memory-reclaim deadlock.
5310 str = kmalloc(len, GFP_KERNEL);
5314 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
5315 clp->rpc_ops->version, clp->cl_minorversion,
5316 nfs4_client_id_uniquifier,
5317 clp->cl_rpcclient->cl_nodename);
5318 clp->cl_owner_id = str;
5323 nfs4_init_uniform_client_string(struct nfs_client *clp)
5328 if (clp->cl_owner_id != NULL)
5331 if (nfs4_client_id_uniquifier[0] != '\0')
5332 return nfs4_init_uniquifier_client_string(clp);
5334 len = 10 + 10 + 1 + 10 + 1 +
5335 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5337 if (len > NFS4_OPAQUE_LIMIT + 1)
5341 * Since this string is allocated at mount time, and held until the
5342 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5343 * about a memory-reclaim deadlock.
5345 str = kmalloc(len, GFP_KERNEL);
5349 scnprintf(str, len, "Linux NFSv%u.%u %s",
5350 clp->rpc_ops->version, clp->cl_minorversion,
5351 clp->cl_rpcclient->cl_nodename);
5352 clp->cl_owner_id = str;
5357 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5358 * services. Advertise one based on the address family of the
5362 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5364 if (strchr(clp->cl_ipaddr, ':') != NULL)
5365 return scnprintf(buf, len, "tcp6");
5367 return scnprintf(buf, len, "tcp");
5370 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5372 struct nfs4_setclientid *sc = calldata;
5374 if (task->tk_status == 0)
5375 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5378 static const struct rpc_call_ops nfs4_setclientid_ops = {
5379 .rpc_call_done = nfs4_setclientid_done,
5383 * nfs4_proc_setclientid - Negotiate client ID
5384 * @clp: state data structure
5385 * @program: RPC program for NFSv4 callback service
5386 * @port: IP port number for NFS4 callback service
5387 * @cred: RPC credential to use for this call
5388 * @res: where to place the result
5390 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5392 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5393 unsigned short port, struct rpc_cred *cred,
5394 struct nfs4_setclientid_res *res)
5396 nfs4_verifier sc_verifier;
5397 struct nfs4_setclientid setclientid = {
5398 .sc_verifier = &sc_verifier,
5402 struct rpc_message msg = {
5403 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5404 .rpc_argp = &setclientid,
5408 struct rpc_task *task;
5409 struct rpc_task_setup task_setup_data = {
5410 .rpc_client = clp->cl_rpcclient,
5411 .rpc_message = &msg,
5412 .callback_ops = &nfs4_setclientid_ops,
5413 .callback_data = &setclientid,
5414 .flags = RPC_TASK_TIMEOUT,
5418 /* nfs_client_id4 */
5419 nfs4_init_boot_verifier(clp, &sc_verifier);
5421 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5422 status = nfs4_init_uniform_client_string(clp);
5424 status = nfs4_init_nonuniform_client_string(clp);
5430 setclientid.sc_netid_len =
5431 nfs4_init_callback_netid(clp,
5432 setclientid.sc_netid,
5433 sizeof(setclientid.sc_netid));
5434 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
5435 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
5436 clp->cl_ipaddr, port >> 8, port & 255);
5438 dprintk("NFS call setclientid auth=%s, '%s'\n",
5439 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5441 task = rpc_run_task(&task_setup_data);
5443 status = PTR_ERR(task);
5446 status = task->tk_status;
5447 if (setclientid.sc_cred) {
5448 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5449 put_rpccred(setclientid.sc_cred);
5453 trace_nfs4_setclientid(clp, status);
5454 dprintk("NFS reply setclientid: %d\n", status);
5459 * nfs4_proc_setclientid_confirm - Confirm client ID
5460 * @clp: state data structure
5461 * @res: result of a previous SETCLIENTID
5462 * @cred: RPC credential to use for this call
5464 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5466 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
5467 struct nfs4_setclientid_res *arg,
5468 struct rpc_cred *cred)
5470 struct rpc_message msg = {
5471 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
5477 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5478 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5480 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5481 trace_nfs4_setclientid_confirm(clp, status);
5482 dprintk("NFS reply setclientid_confirm: %d\n", status);
5486 struct nfs4_delegreturndata {
5487 struct nfs4_delegreturnargs args;
5488 struct nfs4_delegreturnres res;
5490 nfs4_stateid stateid;
5491 unsigned long timestamp;
5492 struct nfs_fattr fattr;
5494 struct inode *inode;
5499 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5501 struct nfs4_delegreturndata *data = calldata;
5503 if (!nfs4_sequence_done(task, &data->res.seq_res))
5506 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
5507 switch (task->tk_status) {
5509 renew_lease(data->res.server, data->timestamp);
5510 case -NFS4ERR_ADMIN_REVOKED:
5511 case -NFS4ERR_DELEG_REVOKED:
5512 case -NFS4ERR_EXPIRED:
5513 nfs4_free_revoked_stateid(data->res.server,
5515 task->tk_msg.rpc_cred);
5516 case -NFS4ERR_BAD_STATEID:
5517 case -NFS4ERR_OLD_STATEID:
5518 case -NFS4ERR_STALE_STATEID:
5519 task->tk_status = 0;
5521 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
5524 if (nfs4_async_handle_error(task, data->res.server,
5525 NULL, NULL) == -EAGAIN) {
5526 rpc_restart_call_prepare(task);
5530 data->rpc_status = task->tk_status;
5533 static void nfs4_delegreturn_release(void *calldata)
5535 struct nfs4_delegreturndata *data = calldata;
5536 struct inode *inode = data->inode;
5540 pnfs_roc_release(inode);
5541 nfs_iput_and_deactive(inode);
5546 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5548 struct nfs4_delegreturndata *d_data;
5550 d_data = (struct nfs4_delegreturndata *)data;
5552 if (nfs4_wait_on_layoutreturn(d_data->inode, task))
5556 pnfs_roc_get_barrier(d_data->inode, &d_data->roc_barrier);
5558 nfs4_setup_sequence(d_data->res.server,
5559 &d_data->args.seq_args,
5560 &d_data->res.seq_res,
5564 static const struct rpc_call_ops nfs4_delegreturn_ops = {
5565 .rpc_call_prepare = nfs4_delegreturn_prepare,
5566 .rpc_call_done = nfs4_delegreturn_done,
5567 .rpc_release = nfs4_delegreturn_release,
5570 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5572 struct nfs4_delegreturndata *data;
5573 struct nfs_server *server = NFS_SERVER(inode);
5574 struct rpc_task *task;
5575 struct rpc_message msg = {
5576 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5579 struct rpc_task_setup task_setup_data = {
5580 .rpc_client = server->client,
5581 .rpc_message = &msg,
5582 .callback_ops = &nfs4_delegreturn_ops,
5583 .flags = RPC_TASK_ASYNC,
5587 data = kzalloc(sizeof(*data), GFP_NOFS);
5590 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
5592 nfs4_state_protect(server->nfs_client,
5593 NFS_SP4_MACH_CRED_CLEANUP,
5594 &task_setup_data.rpc_client, &msg);
5596 data->args.fhandle = &data->fh;
5597 data->args.stateid = &data->stateid;
5598 data->args.bitmask = server->cache_consistency_bitmask;
5599 nfs_copy_fh(&data->fh, NFS_FH(inode));
5600 nfs4_stateid_copy(&data->stateid, stateid);
5601 data->res.fattr = &data->fattr;
5602 data->res.server = server;
5603 nfs_fattr_init(data->res.fattr);
5604 data->timestamp = jiffies;
5605 data->rpc_status = 0;
5606 data->inode = nfs_igrab_and_active(inode);
5608 data->roc = nfs4_roc(inode);
5610 task_setup_data.callback_data = data;
5611 msg.rpc_argp = &data->args;
5612 msg.rpc_resp = &data->res;
5613 task = rpc_run_task(&task_setup_data);
5615 return PTR_ERR(task);
5618 status = nfs4_wait_for_completion_rpc_task(task);
5621 status = data->rpc_status;
5623 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5625 nfs_refresh_inode(inode, &data->fattr);
5631 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5633 struct nfs_server *server = NFS_SERVER(inode);
5634 struct nfs4_exception exception = { };
5637 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
5638 trace_nfs4_delegreturn(inode, stateid, err);
5640 case -NFS4ERR_STALE_STATEID:
5641 case -NFS4ERR_EXPIRED:
5645 err = nfs4_handle_exception(server, err, &exception);
5646 } while (exception.retry);
5650 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5652 struct inode *inode = state->inode;
5653 struct nfs_server *server = NFS_SERVER(inode);
5654 struct nfs_client *clp = server->nfs_client;
5655 struct nfs_lockt_args arg = {
5656 .fh = NFS_FH(inode),
5659 struct nfs_lockt_res res = {
5662 struct rpc_message msg = {
5663 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5666 .rpc_cred = state->owner->so_cred,
5668 struct nfs4_lock_state *lsp;
5671 arg.lock_owner.clientid = clp->cl_clientid;
5672 status = nfs4_set_lock_state(state, request);
5675 lsp = request->fl_u.nfs4_fl.owner;
5676 arg.lock_owner.id = lsp->ls_seqid.owner_id;
5677 arg.lock_owner.s_dev = server->s_dev;
5678 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5681 request->fl_type = F_UNLCK;
5683 case -NFS4ERR_DENIED:
5686 request->fl_ops->fl_release_private(request);
5687 request->fl_ops = NULL;
5692 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5694 struct nfs4_exception exception = { };
5698 err = _nfs4_proc_getlk(state, cmd, request);
5699 trace_nfs4_get_lock(request, state, cmd, err);
5700 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
5702 } while (exception.retry);
5706 struct nfs4_unlockdata {
5707 struct nfs_locku_args arg;
5708 struct nfs_locku_res res;
5709 struct nfs4_lock_state *lsp;
5710 struct nfs_open_context *ctx;
5711 struct file_lock fl;
5712 struct nfs_server *server;
5713 unsigned long timestamp;
5716 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5717 struct nfs_open_context *ctx,
5718 struct nfs4_lock_state *lsp,
5719 struct nfs_seqid *seqid)
5721 struct nfs4_unlockdata *p;
5722 struct inode *inode = lsp->ls_state->inode;
5724 p = kzalloc(sizeof(*p), GFP_NOFS);
5727 p->arg.fh = NFS_FH(inode);
5729 p->arg.seqid = seqid;
5730 p->res.seqid = seqid;
5732 atomic_inc(&lsp->ls_count);
5733 /* Ensure we don't close file until we're done freeing locks! */
5734 p->ctx = get_nfs_open_context(ctx);
5735 memcpy(&p->fl, fl, sizeof(p->fl));
5736 p->server = NFS_SERVER(inode);
5740 static void nfs4_locku_release_calldata(void *data)
5742 struct nfs4_unlockdata *calldata = data;
5743 nfs_free_seqid(calldata->arg.seqid);
5744 nfs4_put_lock_state(calldata->lsp);
5745 put_nfs_open_context(calldata->ctx);
5749 static void nfs4_locku_done(struct rpc_task *task, void *data)
5751 struct nfs4_unlockdata *calldata = data;
5753 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5755 switch (task->tk_status) {
5757 renew_lease(calldata->server, calldata->timestamp);
5758 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl);
5759 if (nfs4_update_lock_stateid(calldata->lsp,
5760 &calldata->res.stateid))
5762 case -NFS4ERR_ADMIN_REVOKED:
5763 case -NFS4ERR_EXPIRED:
5764 nfs4_free_revoked_stateid(calldata->server,
5765 &calldata->arg.stateid,
5766 task->tk_msg.rpc_cred);
5767 case -NFS4ERR_BAD_STATEID:
5768 case -NFS4ERR_OLD_STATEID:
5769 case -NFS4ERR_STALE_STATEID:
5770 if (!nfs4_stateid_match(&calldata->arg.stateid,
5771 &calldata->lsp->ls_stateid))
5772 rpc_restart_call_prepare(task);
5775 if (nfs4_async_handle_error(task, calldata->server,
5776 NULL, NULL) == -EAGAIN)
5777 rpc_restart_call_prepare(task);
5779 nfs_release_seqid(calldata->arg.seqid);
5782 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
5784 struct nfs4_unlockdata *calldata = data;
5786 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
5788 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
5789 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
5790 /* Note: exit _without_ running nfs4_locku_done */
5793 calldata->timestamp = jiffies;
5794 if (nfs4_setup_sequence(calldata->server,
5795 &calldata->arg.seq_args,
5796 &calldata->res.seq_res,
5798 nfs_release_seqid(calldata->arg.seqid);
5801 task->tk_action = NULL;
5803 nfs4_sequence_done(task, &calldata->res.seq_res);
5806 static const struct rpc_call_ops nfs4_locku_ops = {
5807 .rpc_call_prepare = nfs4_locku_prepare,
5808 .rpc_call_done = nfs4_locku_done,
5809 .rpc_release = nfs4_locku_release_calldata,
5812 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5813 struct nfs_open_context *ctx,
5814 struct nfs4_lock_state *lsp,
5815 struct nfs_seqid *seqid)
5817 struct nfs4_unlockdata *data;
5818 struct rpc_message msg = {
5819 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5820 .rpc_cred = ctx->cred,
5822 struct rpc_task_setup task_setup_data = {
5823 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5824 .rpc_message = &msg,
5825 .callback_ops = &nfs4_locku_ops,
5826 .workqueue = nfsiod_workqueue,
5827 .flags = RPC_TASK_ASYNC,
5830 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5831 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5833 /* Ensure this is an unlock - when canceling a lock, the
5834 * canceled lock is passed in, and it won't be an unlock.
5836 fl->fl_type = F_UNLCK;
5838 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5840 nfs_free_seqid(seqid);
5841 return ERR_PTR(-ENOMEM);
5844 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5845 msg.rpc_argp = &data->arg;
5846 msg.rpc_resp = &data->res;
5847 task_setup_data.callback_data = data;
5848 return rpc_run_task(&task_setup_data);
5851 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5853 struct inode *inode = state->inode;
5854 struct nfs4_state_owner *sp = state->owner;
5855 struct nfs_inode *nfsi = NFS_I(inode);
5856 struct nfs_seqid *seqid;
5857 struct nfs4_lock_state *lsp;
5858 struct rpc_task *task;
5859 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
5861 unsigned char fl_flags = request->fl_flags;
5863 status = nfs4_set_lock_state(state, request);
5864 /* Unlock _before_ we do the RPC call */
5865 request->fl_flags |= FL_EXISTS;
5866 /* Exclude nfs_delegation_claim_locks() */
5867 mutex_lock(&sp->so_delegreturn_mutex);
5868 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
5869 down_read(&nfsi->rwsem);
5870 if (locks_lock_inode_wait(inode, request) == -ENOENT) {
5871 up_read(&nfsi->rwsem);
5872 mutex_unlock(&sp->so_delegreturn_mutex);
5875 up_read(&nfsi->rwsem);
5876 mutex_unlock(&sp->so_delegreturn_mutex);
5879 /* Is this a delegated lock? */
5880 lsp = request->fl_u.nfs4_fl.owner;
5881 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5883 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5884 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
5888 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
5889 status = PTR_ERR(task);
5892 status = nfs4_wait_for_completion_rpc_task(task);
5895 request->fl_flags = fl_flags;
5896 trace_nfs4_unlock(request, state, F_SETLK, status);
5900 struct nfs4_lockdata {
5901 struct nfs_lock_args arg;
5902 struct nfs_lock_res res;
5903 struct nfs4_lock_state *lsp;
5904 struct nfs_open_context *ctx;
5905 struct file_lock fl;
5906 unsigned long timestamp;
5909 struct nfs_server *server;
5912 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
5913 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5916 struct nfs4_lockdata *p;
5917 struct inode *inode = lsp->ls_state->inode;
5918 struct nfs_server *server = NFS_SERVER(inode);
5919 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
5921 p = kzalloc(sizeof(*p), gfp_mask);
5925 p->arg.fh = NFS_FH(inode);
5927 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
5928 if (IS_ERR(p->arg.open_seqid))
5930 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5931 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
5932 if (IS_ERR(p->arg.lock_seqid))
5933 goto out_free_seqid;
5934 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
5935 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
5936 p->arg.lock_owner.s_dev = server->s_dev;
5937 p->res.lock_seqid = p->arg.lock_seqid;
5940 atomic_inc(&lsp->ls_count);
5941 p->ctx = get_nfs_open_context(ctx);
5942 get_file(fl->fl_file);
5943 memcpy(&p->fl, fl, sizeof(p->fl));
5946 nfs_free_seqid(p->arg.open_seqid);
5952 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5954 struct nfs4_lockdata *data = calldata;
5955 struct nfs4_state *state = data->lsp->ls_state;
5957 dprintk("%s: begin!\n", __func__);
5958 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
5960 /* Do we need to do an open_to_lock_owner? */
5961 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
5962 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
5963 goto out_release_lock_seqid;
5965 nfs4_stateid_copy(&data->arg.open_stateid,
5966 &state->open_stateid);
5967 data->arg.new_lock_owner = 1;
5968 data->res.open_seqid = data->arg.open_seqid;
5970 data->arg.new_lock_owner = 0;
5971 nfs4_stateid_copy(&data->arg.lock_stateid,
5972 &data->lsp->ls_stateid);
5974 if (!nfs4_valid_open_stateid(state)) {
5975 data->rpc_status = -EBADF;
5976 task->tk_action = NULL;
5977 goto out_release_open_seqid;
5979 data->timestamp = jiffies;
5980 if (nfs4_setup_sequence(data->server,
5981 &data->arg.seq_args,
5985 out_release_open_seqid:
5986 nfs_release_seqid(data->arg.open_seqid);
5987 out_release_lock_seqid:
5988 nfs_release_seqid(data->arg.lock_seqid);
5990 nfs4_sequence_done(task, &data->res.seq_res);
5991 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
5994 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5996 struct nfs4_lockdata *data = calldata;
5997 struct nfs4_lock_state *lsp = data->lsp;
5999 dprintk("%s: begin!\n", __func__);
6001 if (!nfs4_sequence_done(task, &data->res.seq_res))
6004 data->rpc_status = task->tk_status;
6005 switch (task->tk_status) {
6007 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
6009 if (data->arg.new_lock) {
6010 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
6011 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) {
6012 rpc_restart_call_prepare(task);
6016 if (data->arg.new_lock_owner != 0) {
6017 nfs_confirm_seqid(&lsp->ls_seqid, 0);
6018 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
6019 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
6020 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
6021 rpc_restart_call_prepare(task);
6023 case -NFS4ERR_BAD_STATEID:
6024 case -NFS4ERR_OLD_STATEID:
6025 case -NFS4ERR_STALE_STATEID:
6026 case -NFS4ERR_EXPIRED:
6027 if (data->arg.new_lock_owner != 0) {
6028 if (!nfs4_stateid_match(&data->arg.open_stateid,
6029 &lsp->ls_state->open_stateid))
6030 rpc_restart_call_prepare(task);
6031 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
6033 rpc_restart_call_prepare(task);
6035 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
6038 static void nfs4_lock_release(void *calldata)
6040 struct nfs4_lockdata *data = calldata;
6042 dprintk("%s: begin!\n", __func__);
6043 nfs_free_seqid(data->arg.open_seqid);
6044 if (data->cancelled != 0) {
6045 struct rpc_task *task;
6046 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
6047 data->arg.lock_seqid);
6049 rpc_put_task_async(task);
6050 dprintk("%s: cancelling lock!\n", __func__);
6052 nfs_free_seqid(data->arg.lock_seqid);
6053 nfs4_put_lock_state(data->lsp);
6054 put_nfs_open_context(data->ctx);
6055 fput(data->fl.fl_file);
6057 dprintk("%s: done!\n", __func__);
6060 static const struct rpc_call_ops nfs4_lock_ops = {
6061 .rpc_call_prepare = nfs4_lock_prepare,
6062 .rpc_call_done = nfs4_lock_done,
6063 .rpc_release = nfs4_lock_release,
6066 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
6069 case -NFS4ERR_ADMIN_REVOKED:
6070 case -NFS4ERR_BAD_STATEID:
6071 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
6072 if (new_lock_owner != 0 ||
6073 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
6074 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
6076 case -NFS4ERR_STALE_STATEID:
6077 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
6078 case -NFS4ERR_EXPIRED:
6079 nfs4_schedule_lease_recovery(server->nfs_client);
6083 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
6085 struct nfs4_lockdata *data;
6086 struct rpc_task *task;
6087 struct rpc_message msg = {
6088 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
6089 .rpc_cred = state->owner->so_cred,
6091 struct rpc_task_setup task_setup_data = {
6092 .rpc_client = NFS_CLIENT(state->inode),
6093 .rpc_message = &msg,
6094 .callback_ops = &nfs4_lock_ops,
6095 .workqueue = nfsiod_workqueue,
6096 .flags = RPC_TASK_ASYNC,
6100 dprintk("%s: begin!\n", __func__);
6101 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
6102 fl->fl_u.nfs4_fl.owner,
6103 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
6107 data->arg.block = 1;
6108 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
6109 msg.rpc_argp = &data->arg;
6110 msg.rpc_resp = &data->res;
6111 task_setup_data.callback_data = data;
6112 if (recovery_type > NFS_LOCK_NEW) {
6113 if (recovery_type == NFS_LOCK_RECLAIM)
6114 data->arg.reclaim = NFS_LOCK_RECLAIM;
6115 nfs4_set_sequence_privileged(&data->arg.seq_args);
6117 data->arg.new_lock = 1;
6118 task = rpc_run_task(&task_setup_data);
6120 return PTR_ERR(task);
6121 ret = nfs4_wait_for_completion_rpc_task(task);
6123 ret = data->rpc_status;
6125 nfs4_handle_setlk_error(data->server, data->lsp,
6126 data->arg.new_lock_owner, ret);
6128 data->cancelled = 1;
6130 dprintk("%s: done, ret = %d!\n", __func__, ret);
6131 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
6135 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
6137 struct nfs_server *server = NFS_SERVER(state->inode);
6138 struct nfs4_exception exception = {
6139 .inode = state->inode,
6144 /* Cache the lock if possible... */
6145 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6147 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
6148 if (err != -NFS4ERR_DELAY)
6150 nfs4_handle_exception(server, err, &exception);
6151 } while (exception.retry);
6155 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
6157 struct nfs_server *server = NFS_SERVER(state->inode);
6158 struct nfs4_exception exception = {
6159 .inode = state->inode,
6163 err = nfs4_set_lock_state(state, request);
6166 if (!recover_lost_locks) {
6167 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
6171 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6173 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
6177 case -NFS4ERR_GRACE:
6178 case -NFS4ERR_DELAY:
6179 nfs4_handle_exception(server, err, &exception);
6182 } while (exception.retry);
6187 #if defined(CONFIG_NFS_V4_1)
6188 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6190 struct nfs4_lock_state *lsp;
6193 status = nfs4_set_lock_state(state, request);
6196 lsp = request->fl_u.nfs4_fl.owner;
6197 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) ||
6198 test_bit(NFS_LOCK_LOST, &lsp->ls_flags))
6200 status = nfs4_lock_expired(state, request);
6205 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6207 struct nfs_inode *nfsi = NFS_I(state->inode);
6208 struct nfs4_state_owner *sp = state->owner;
6209 unsigned char fl_flags = request->fl_flags;
6212 request->fl_flags |= FL_ACCESS;
6213 status = locks_lock_inode_wait(state->inode, request);
6216 mutex_lock(&sp->so_delegreturn_mutex);
6217 down_read(&nfsi->rwsem);
6218 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
6219 /* Yes: cache locks! */
6220 /* ...but avoid races with delegation recall... */
6221 request->fl_flags = fl_flags & ~FL_SLEEP;
6222 status = locks_lock_inode_wait(state->inode, request);
6223 up_read(&nfsi->rwsem);
6224 mutex_unlock(&sp->so_delegreturn_mutex);
6227 up_read(&nfsi->rwsem);
6228 mutex_unlock(&sp->so_delegreturn_mutex);
6229 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6231 request->fl_flags = fl_flags;
6235 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6237 struct nfs4_exception exception = {
6239 .inode = state->inode,
6244 err = _nfs4_proc_setlk(state, cmd, request);
6245 if (err == -NFS4ERR_DENIED)
6247 err = nfs4_handle_exception(NFS_SERVER(state->inode),
6249 } while (exception.retry);
6253 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
6254 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
6257 nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd,
6258 struct file_lock *request)
6260 int status = -ERESTARTSYS;
6261 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6263 while(!signalled()) {
6264 status = nfs4_proc_setlk(state, cmd, request);
6265 if ((status != -EAGAIN) || IS_SETLK(cmd))
6267 freezable_schedule_timeout_interruptible(timeout);
6269 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout);
6270 status = -ERESTARTSYS;
6275 #ifdef CONFIG_NFS_V4_1
6276 struct nfs4_lock_waiter {
6277 struct task_struct *task;
6278 struct inode *inode;
6279 struct nfs_lowner *owner;
6284 nfs4_wake_lock_waiter(wait_queue_t *wait, unsigned int mode, int flags, void *key)
6287 struct cb_notify_lock_args *cbnl = key;
6288 struct nfs4_lock_waiter *waiter = wait->private;
6289 struct nfs_lowner *lowner = &cbnl->cbnl_owner,
6290 *wowner = waiter->owner;
6292 /* Only wake if the callback was for the same owner */
6293 if (lowner->clientid != wowner->clientid ||
6294 lowner->id != wowner->id ||
6295 lowner->s_dev != wowner->s_dev)
6298 /* Make sure it's for the right inode */
6299 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh))
6302 waiter->notified = true;
6304 /* override "private" so we can use default_wake_function */
6305 wait->private = waiter->task;
6306 ret = autoremove_wake_function(wait, mode, flags, key);
6307 wait->private = waiter;
6312 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6314 int status = -ERESTARTSYS;
6315 unsigned long flags;
6316 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner;
6317 struct nfs_server *server = NFS_SERVER(state->inode);
6318 struct nfs_client *clp = server->nfs_client;
6319 wait_queue_head_t *q = &clp->cl_lock_waitq;
6320 struct nfs_lowner owner = { .clientid = clp->cl_clientid,
6321 .id = lsp->ls_seqid.owner_id,
6322 .s_dev = server->s_dev };
6323 struct nfs4_lock_waiter waiter = { .task = current,
6324 .inode = state->inode,
6326 .notified = false };
6329 /* Don't bother with waitqueue if we don't expect a callback */
6330 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags))
6331 return nfs4_retry_setlk_simple(state, cmd, request);
6334 wait.private = &waiter;
6335 wait.func = nfs4_wake_lock_waiter;
6336 add_wait_queue(q, &wait);
6338 while(!signalled()) {
6339 status = nfs4_proc_setlk(state, cmd, request);
6340 if ((status != -EAGAIN) || IS_SETLK(cmd))
6343 status = -ERESTARTSYS;
6344 spin_lock_irqsave(&q->lock, flags);
6345 if (waiter.notified) {
6346 spin_unlock_irqrestore(&q->lock, flags);
6349 set_current_state(TASK_INTERRUPTIBLE);
6350 spin_unlock_irqrestore(&q->lock, flags);
6352 freezable_schedule_timeout_interruptible(NFS4_LOCK_MAXTIMEOUT);
6355 finish_wait(q, &wait);
6358 #else /* !CONFIG_NFS_V4_1 */
6360 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6362 return nfs4_retry_setlk_simple(state, cmd, request);
6367 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6369 struct nfs_open_context *ctx;
6370 struct nfs4_state *state;
6373 /* verify open state */
6374 ctx = nfs_file_open_context(filp);
6377 if (request->fl_start < 0 || request->fl_end < 0)
6380 if (IS_GETLK(cmd)) {
6382 return nfs4_proc_getlk(state, F_GETLK, request);
6386 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6389 if (request->fl_type == F_UNLCK) {
6391 return nfs4_proc_unlck(state, cmd, request);
6398 if ((request->fl_flags & FL_POSIX) &&
6399 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6403 * Don't rely on the VFS having checked the file open mode,
6404 * since it won't do this for flock() locks.
6406 switch (request->fl_type) {
6408 if (!(filp->f_mode & FMODE_READ))
6412 if (!(filp->f_mode & FMODE_WRITE))
6416 status = nfs4_set_lock_state(state, request);
6420 return nfs4_retry_setlk(state, cmd, request);
6423 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
6425 struct nfs_server *server = NFS_SERVER(state->inode);
6428 err = nfs4_set_lock_state(state, fl);
6431 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
6432 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
6435 struct nfs_release_lockowner_data {
6436 struct nfs4_lock_state *lsp;
6437 struct nfs_server *server;
6438 struct nfs_release_lockowner_args args;
6439 struct nfs_release_lockowner_res res;
6440 unsigned long timestamp;
6443 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6445 struct nfs_release_lockowner_data *data = calldata;
6446 struct nfs_server *server = data->server;
6447 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6448 &data->args.seq_args, &data->res.seq_res, task);
6449 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6450 data->timestamp = jiffies;
6453 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6455 struct nfs_release_lockowner_data *data = calldata;
6456 struct nfs_server *server = data->server;
6458 nfs40_sequence_done(task, &data->res.seq_res);
6460 switch (task->tk_status) {
6462 renew_lease(server, data->timestamp);
6464 case -NFS4ERR_STALE_CLIENTID:
6465 case -NFS4ERR_EXPIRED:
6466 nfs4_schedule_lease_recovery(server->nfs_client);
6468 case -NFS4ERR_LEASE_MOVED:
6469 case -NFS4ERR_DELAY:
6470 if (nfs4_async_handle_error(task, server,
6471 NULL, NULL) == -EAGAIN)
6472 rpc_restart_call_prepare(task);
6476 static void nfs4_release_lockowner_release(void *calldata)
6478 struct nfs_release_lockowner_data *data = calldata;
6479 nfs4_free_lock_state(data->server, data->lsp);
6483 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
6484 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6485 .rpc_call_done = nfs4_release_lockowner_done,
6486 .rpc_release = nfs4_release_lockowner_release,
6490 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
6492 struct nfs_release_lockowner_data *data;
6493 struct rpc_message msg = {
6494 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6497 if (server->nfs_client->cl_mvops->minor_version != 0)
6500 data = kmalloc(sizeof(*data), GFP_NOFS);
6504 data->server = server;
6505 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6506 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6507 data->args.lock_owner.s_dev = server->s_dev;
6509 msg.rpc_argp = &data->args;
6510 msg.rpc_resp = &data->res;
6511 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
6512 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
6515 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6517 static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
6518 struct dentry *unused, struct inode *inode,
6519 const char *key, const void *buf,
6520 size_t buflen, int flags)
6522 return nfs4_proc_set_acl(inode, buf, buflen);
6525 static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
6526 struct dentry *unused, struct inode *inode,
6527 const char *key, void *buf, size_t buflen)
6529 return nfs4_proc_get_acl(inode, buf, buflen);
6532 static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
6534 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
6537 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
6539 static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
6540 struct dentry *unused, struct inode *inode,
6541 const char *key, const void *buf,
6542 size_t buflen, int flags)
6544 if (security_ismaclabel(key))
6545 return nfs4_set_security_label(inode, buf, buflen);
6550 static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
6551 struct dentry *unused, struct inode *inode,
6552 const char *key, void *buf, size_t buflen)
6554 if (security_ismaclabel(key))
6555 return nfs4_get_security_label(inode, buf, buflen);
6560 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6564 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
6565 len = security_inode_listsecurity(inode, list, list_len);
6566 if (list_len && len > list_len)
6572 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6573 .prefix = XATTR_SECURITY_PREFIX,
6574 .get = nfs4_xattr_get_nfs4_label,
6575 .set = nfs4_xattr_set_nfs4_label,
6581 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6589 * nfs_fhget will use either the mounted_on_fileid or the fileid
6591 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6593 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6594 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6595 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
6596 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
6599 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
6600 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
6601 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6605 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6606 const struct qstr *name,
6607 struct nfs4_fs_locations *fs_locations,
6610 struct nfs_server *server = NFS_SERVER(dir);
6612 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6614 struct nfs4_fs_locations_arg args = {
6615 .dir_fh = NFS_FH(dir),
6620 struct nfs4_fs_locations_res res = {
6621 .fs_locations = fs_locations,
6623 struct rpc_message msg = {
6624 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6630 dprintk("%s: start\n", __func__);
6632 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6633 * is not supported */
6634 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6635 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6637 bitmask[0] |= FATTR4_WORD0_FILEID;
6639 nfs_fattr_init(&fs_locations->fattr);
6640 fs_locations->server = server;
6641 fs_locations->nlocations = 0;
6642 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
6643 dprintk("%s: returned status = %d\n", __func__, status);
6647 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6648 const struct qstr *name,
6649 struct nfs4_fs_locations *fs_locations,
6652 struct nfs4_exception exception = { };
6655 err = _nfs4_proc_fs_locations(client, dir, name,
6656 fs_locations, page);
6657 trace_nfs4_get_fs_locations(dir, name, err);
6658 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6660 } while (exception.retry);
6665 * This operation also signals the server that this client is
6666 * performing migration recovery. The server can stop returning
6667 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6668 * appended to this compound to identify the client ID which is
6669 * performing recovery.
6671 static int _nfs40_proc_get_locations(struct inode *inode,
6672 struct nfs4_fs_locations *locations,
6673 struct page *page, struct rpc_cred *cred)
6675 struct nfs_server *server = NFS_SERVER(inode);
6676 struct rpc_clnt *clnt = server->client;
6678 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6680 struct nfs4_fs_locations_arg args = {
6681 .clientid = server->nfs_client->cl_clientid,
6682 .fh = NFS_FH(inode),
6685 .migration = 1, /* skip LOOKUP */
6686 .renew = 1, /* append RENEW */
6688 struct nfs4_fs_locations_res res = {
6689 .fs_locations = locations,
6693 struct rpc_message msg = {
6694 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6699 unsigned long now = jiffies;
6702 nfs_fattr_init(&locations->fattr);
6703 locations->server = server;
6704 locations->nlocations = 0;
6706 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6707 nfs4_set_sequence_privileged(&args.seq_args);
6708 status = nfs4_call_sync_sequence(clnt, server, &msg,
6709 &args.seq_args, &res.seq_res);
6713 renew_lease(server, now);
6717 #ifdef CONFIG_NFS_V4_1
6720 * This operation also signals the server that this client is
6721 * performing migration recovery. The server can stop asserting
6722 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6723 * performing this operation is identified in the SEQUENCE
6724 * operation in this compound.
6726 * When the client supports GETATTR(fs_locations_info), it can
6727 * be plumbed in here.
6729 static int _nfs41_proc_get_locations(struct inode *inode,
6730 struct nfs4_fs_locations *locations,
6731 struct page *page, struct rpc_cred *cred)
6733 struct nfs_server *server = NFS_SERVER(inode);
6734 struct rpc_clnt *clnt = server->client;
6736 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6738 struct nfs4_fs_locations_arg args = {
6739 .fh = NFS_FH(inode),
6742 .migration = 1, /* skip LOOKUP */
6744 struct nfs4_fs_locations_res res = {
6745 .fs_locations = locations,
6748 struct rpc_message msg = {
6749 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6756 nfs_fattr_init(&locations->fattr);
6757 locations->server = server;
6758 locations->nlocations = 0;
6760 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6761 nfs4_set_sequence_privileged(&args.seq_args);
6762 status = nfs4_call_sync_sequence(clnt, server, &msg,
6763 &args.seq_args, &res.seq_res);
6764 if (status == NFS4_OK &&
6765 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6766 status = -NFS4ERR_LEASE_MOVED;
6770 #endif /* CONFIG_NFS_V4_1 */
6773 * nfs4_proc_get_locations - discover locations for a migrated FSID
6774 * @inode: inode on FSID that is migrating
6775 * @locations: result of query
6777 * @cred: credential to use for this operation
6779 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6780 * operation failed, or a negative errno if a local error occurred.
6782 * On success, "locations" is filled in, but if the server has
6783 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6786 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6787 * from this client that require migration recovery.
6789 int nfs4_proc_get_locations(struct inode *inode,
6790 struct nfs4_fs_locations *locations,
6791 struct page *page, struct rpc_cred *cred)
6793 struct nfs_server *server = NFS_SERVER(inode);
6794 struct nfs_client *clp = server->nfs_client;
6795 const struct nfs4_mig_recovery_ops *ops =
6796 clp->cl_mvops->mig_recovery_ops;
6797 struct nfs4_exception exception = { };
6800 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6801 (unsigned long long)server->fsid.major,
6802 (unsigned long long)server->fsid.minor,
6804 nfs_display_fhandle(NFS_FH(inode), __func__);
6807 status = ops->get_locations(inode, locations, page, cred);
6808 if (status != -NFS4ERR_DELAY)
6810 nfs4_handle_exception(server, status, &exception);
6811 } while (exception.retry);
6816 * This operation also signals the server that this client is
6817 * performing "lease moved" recovery. The server can stop
6818 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6819 * is appended to this compound to identify the client ID which is
6820 * performing recovery.
6822 static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6824 struct nfs_server *server = NFS_SERVER(inode);
6825 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6826 struct rpc_clnt *clnt = server->client;
6827 struct nfs4_fsid_present_arg args = {
6828 .fh = NFS_FH(inode),
6829 .clientid = clp->cl_clientid,
6830 .renew = 1, /* append RENEW */
6832 struct nfs4_fsid_present_res res = {
6835 struct rpc_message msg = {
6836 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6841 unsigned long now = jiffies;
6844 res.fh = nfs_alloc_fhandle();
6848 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6849 nfs4_set_sequence_privileged(&args.seq_args);
6850 status = nfs4_call_sync_sequence(clnt, server, &msg,
6851 &args.seq_args, &res.seq_res);
6852 nfs_free_fhandle(res.fh);
6856 do_renew_lease(clp, now);
6860 #ifdef CONFIG_NFS_V4_1
6863 * This operation also signals the server that this client is
6864 * performing "lease moved" recovery. The server can stop asserting
6865 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6866 * this operation is identified in the SEQUENCE operation in this
6869 static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6871 struct nfs_server *server = NFS_SERVER(inode);
6872 struct rpc_clnt *clnt = server->client;
6873 struct nfs4_fsid_present_arg args = {
6874 .fh = NFS_FH(inode),
6876 struct nfs4_fsid_present_res res = {
6878 struct rpc_message msg = {
6879 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6886 res.fh = nfs_alloc_fhandle();
6890 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6891 nfs4_set_sequence_privileged(&args.seq_args);
6892 status = nfs4_call_sync_sequence(clnt, server, &msg,
6893 &args.seq_args, &res.seq_res);
6894 nfs_free_fhandle(res.fh);
6895 if (status == NFS4_OK &&
6896 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6897 status = -NFS4ERR_LEASE_MOVED;
6901 #endif /* CONFIG_NFS_V4_1 */
6904 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6905 * @inode: inode on FSID to check
6906 * @cred: credential to use for this operation
6908 * Server indicates whether the FSID is present, moved, or not
6909 * recognized. This operation is necessary to clear a LEASE_MOVED
6910 * condition for this client ID.
6912 * Returns NFS4_OK if the FSID is present on this server,
6913 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6914 * NFS4ERR code if some error occurred on the server, or a
6915 * negative errno if a local failure occurred.
6917 int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6919 struct nfs_server *server = NFS_SERVER(inode);
6920 struct nfs_client *clp = server->nfs_client;
6921 const struct nfs4_mig_recovery_ops *ops =
6922 clp->cl_mvops->mig_recovery_ops;
6923 struct nfs4_exception exception = { };
6926 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6927 (unsigned long long)server->fsid.major,
6928 (unsigned long long)server->fsid.minor,
6930 nfs_display_fhandle(NFS_FH(inode), __func__);
6933 status = ops->fsid_present(inode, cred);
6934 if (status != -NFS4ERR_DELAY)
6936 nfs4_handle_exception(server, status, &exception);
6937 } while (exception.retry);
6942 * If 'use_integrity' is true and the state managment nfs_client
6943 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6944 * and the machine credential as per RFC3530bis and RFC5661 Security
6945 * Considerations sections. Otherwise, just use the user cred with the
6946 * filesystem's rpc_client.
6948 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
6951 struct nfs4_secinfo_arg args = {
6952 .dir_fh = NFS_FH(dir),
6955 struct nfs4_secinfo_res res = {
6958 struct rpc_message msg = {
6959 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6963 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
6964 struct rpc_cred *cred = NULL;
6966 if (use_integrity) {
6967 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
6968 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6969 msg.rpc_cred = cred;
6972 dprintk("NFS call secinfo %s\n", name->name);
6974 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6975 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6977 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6979 dprintk("NFS reply secinfo: %d\n", status);
6987 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6988 struct nfs4_secinfo_flavors *flavors)
6990 struct nfs4_exception exception = { };
6993 err = -NFS4ERR_WRONGSEC;
6995 /* try to use integrity protection with machine cred */
6996 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6997 err = _nfs4_proc_secinfo(dir, name, flavors, true);
7000 * if unable to use integrity protection, or SECINFO with
7001 * integrity protection returns NFS4ERR_WRONGSEC (which is
7002 * disallowed by spec, but exists in deployed servers) use
7003 * the current filesystem's rpc_client and the user cred.
7005 if (err == -NFS4ERR_WRONGSEC)
7006 err = _nfs4_proc_secinfo(dir, name, flavors, false);
7008 trace_nfs4_secinfo(dir, name, err);
7009 err = nfs4_handle_exception(NFS_SERVER(dir), err,
7011 } while (exception.retry);
7015 #ifdef CONFIG_NFS_V4_1
7017 * Check the exchange flags returned by the server for invalid flags, having
7018 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
7021 static int nfs4_check_cl_exchange_flags(u32 flags)
7023 if (flags & ~EXCHGID4_FLAG_MASK_R)
7025 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
7026 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
7028 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
7032 return -NFS4ERR_INVAL;
7036 nfs41_same_server_scope(struct nfs41_server_scope *a,
7037 struct nfs41_server_scope *b)
7039 if (a->server_scope_sz == b->server_scope_sz &&
7040 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
7047 nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
7051 static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
7052 .rpc_call_done = &nfs4_bind_one_conn_to_session_done,
7056 * nfs4_proc_bind_one_conn_to_session()
7058 * The 4.1 client currently uses the same TCP connection for the
7059 * fore and backchannel.
7062 int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
7063 struct rpc_xprt *xprt,
7064 struct nfs_client *clp,
7065 struct rpc_cred *cred)
7068 struct nfs41_bind_conn_to_session_args args = {
7070 .dir = NFS4_CDFC4_FORE_OR_BOTH,
7072 struct nfs41_bind_conn_to_session_res res;
7073 struct rpc_message msg = {
7075 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
7080 struct rpc_task_setup task_setup_data = {
7083 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
7084 .rpc_message = &msg,
7085 .flags = RPC_TASK_TIMEOUT,
7087 struct rpc_task *task;
7089 dprintk("--> %s\n", __func__);
7091 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
7092 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
7093 args.dir = NFS4_CDFC4_FORE;
7095 /* Do not set the backchannel flag unless this is clnt->cl_xprt */
7096 if (xprt != rcu_access_pointer(clnt->cl_xprt))
7097 args.dir = NFS4_CDFC4_FORE;
7099 task = rpc_run_task(&task_setup_data);
7100 if (!IS_ERR(task)) {
7101 status = task->tk_status;
7104 status = PTR_ERR(task);
7105 trace_nfs4_bind_conn_to_session(clp, status);
7107 if (memcmp(res.sessionid.data,
7108 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
7109 dprintk("NFS: %s: Session ID mismatch\n", __func__);
7113 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7114 dprintk("NFS: %s: Unexpected direction from server\n",
7119 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7120 dprintk("NFS: %s: Server returned RDMA mode = true\n",
7127 dprintk("<-- %s status= %d\n", __func__, status);
7131 struct rpc_bind_conn_calldata {
7132 struct nfs_client *clp;
7133 struct rpc_cred *cred;
7137 nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
7138 struct rpc_xprt *xprt,
7141 struct rpc_bind_conn_calldata *p = calldata;
7143 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
7146 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7148 struct rpc_bind_conn_calldata data = {
7152 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
7153 nfs4_proc_bind_conn_to_session_callback, &data);
7157 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
7158 * and operations we'd like to see to enable certain features in the allow map
7160 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
7161 .how = SP4_MACH_CRED,
7162 .enforce.u.words = {
7163 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7164 1 << (OP_EXCHANGE_ID - 32) |
7165 1 << (OP_CREATE_SESSION - 32) |
7166 1 << (OP_DESTROY_SESSION - 32) |
7167 1 << (OP_DESTROY_CLIENTID - 32)
7170 [0] = 1 << (OP_CLOSE) |
7171 1 << (OP_OPEN_DOWNGRADE) |
7173 1 << (OP_DELEGRETURN) |
7175 [1] = 1 << (OP_SECINFO - 32) |
7176 1 << (OP_SECINFO_NO_NAME - 32) |
7177 1 << (OP_LAYOUTRETURN - 32) |
7178 1 << (OP_TEST_STATEID - 32) |
7179 1 << (OP_FREE_STATEID - 32) |
7180 1 << (OP_WRITE - 32)
7185 * Select the state protection mode for client `clp' given the server results
7186 * from exchange_id in `sp'.
7188 * Returns 0 on success, negative errno otherwise.
7190 static int nfs4_sp4_select_mode(struct nfs_client *clp,
7191 struct nfs41_state_protection *sp)
7193 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
7194 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7195 1 << (OP_EXCHANGE_ID - 32) |
7196 1 << (OP_CREATE_SESSION - 32) |
7197 1 << (OP_DESTROY_SESSION - 32) |
7198 1 << (OP_DESTROY_CLIENTID - 32)
7202 if (sp->how == SP4_MACH_CRED) {
7203 /* Print state protect result */
7204 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
7205 for (i = 0; i <= LAST_NFS4_OP; i++) {
7206 if (test_bit(i, sp->enforce.u.longs))
7207 dfprintk(MOUNT, " enforce op %d\n", i);
7208 if (test_bit(i, sp->allow.u.longs))
7209 dfprintk(MOUNT, " allow op %d\n", i);
7212 /* make sure nothing is on enforce list that isn't supported */
7213 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
7214 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
7215 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7221 * Minimal mode - state operations are allowed to use machine
7222 * credential. Note this already happens by default, so the
7223 * client doesn't have to do anything more than the negotiation.
7225 * NOTE: we don't care if EXCHANGE_ID is in the list -
7226 * we're already using the machine cred for exchange_id
7227 * and will never use a different cred.
7229 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
7230 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
7231 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
7232 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
7233 dfprintk(MOUNT, "sp4_mach_cred:\n");
7234 dfprintk(MOUNT, " minimal mode enabled\n");
7235 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
7237 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7241 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
7242 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
7243 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
7244 test_bit(OP_LOCKU, sp->allow.u.longs)) {
7245 dfprintk(MOUNT, " cleanup mode enabled\n");
7246 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
7249 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
7250 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
7251 set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP,
7252 &clp->cl_sp4_flags);
7255 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
7256 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
7257 dfprintk(MOUNT, " secinfo mode enabled\n");
7258 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
7261 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
7262 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
7263 dfprintk(MOUNT, " stateid mode enabled\n");
7264 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
7267 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
7268 dfprintk(MOUNT, " write mode enabled\n");
7269 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
7272 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
7273 dfprintk(MOUNT, " commit mode enabled\n");
7274 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
7281 struct nfs41_exchange_id_data {
7282 struct nfs41_exchange_id_res res;
7283 struct nfs41_exchange_id_args args;
7284 struct rpc_xprt *xprt;
7288 static void nfs4_exchange_id_done(struct rpc_task *task, void *data)
7290 struct nfs41_exchange_id_data *cdata =
7291 (struct nfs41_exchange_id_data *)data;
7292 struct nfs_client *clp = cdata->args.client;
7293 int status = task->tk_status;
7295 trace_nfs4_exchange_id(clp, status);
7298 status = nfs4_check_cl_exchange_flags(cdata->res.flags);
7300 if (cdata->xprt && status == 0) {
7301 status = nfs4_detect_session_trunking(clp, &cdata->res,
7307 status = nfs4_sp4_select_mode(clp, &cdata->res.state_protect);
7310 clp->cl_clientid = cdata->res.clientid;
7311 clp->cl_exchange_flags = cdata->res.flags;
7312 /* Client ID is not confirmed */
7313 if (!(cdata->res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
7314 clear_bit(NFS4_SESSION_ESTABLISHED,
7315 &clp->cl_session->session_state);
7316 clp->cl_seqid = cdata->res.seqid;
7319 kfree(clp->cl_serverowner);
7320 clp->cl_serverowner = cdata->res.server_owner;
7321 cdata->res.server_owner = NULL;
7323 /* use the most recent implementation id */
7324 kfree(clp->cl_implid);
7325 clp->cl_implid = cdata->res.impl_id;
7326 cdata->res.impl_id = NULL;
7328 if (clp->cl_serverscope != NULL &&
7329 !nfs41_same_server_scope(clp->cl_serverscope,
7330 cdata->res.server_scope)) {
7331 dprintk("%s: server_scope mismatch detected\n",
7333 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
7334 kfree(clp->cl_serverscope);
7335 clp->cl_serverscope = NULL;
7338 if (clp->cl_serverscope == NULL) {
7339 clp->cl_serverscope = cdata->res.server_scope;
7340 cdata->res.server_scope = NULL;
7342 /* Save the EXCHANGE_ID verifier session trunk tests */
7343 memcpy(clp->cl_confirm.data, cdata->args.verifier->data,
7344 sizeof(clp->cl_confirm.data));
7347 cdata->rpc_status = status;
7351 static void nfs4_exchange_id_release(void *data)
7353 struct nfs41_exchange_id_data *cdata =
7354 (struct nfs41_exchange_id_data *)data;
7356 nfs_put_client(cdata->args.client);
7358 xprt_put(cdata->xprt);
7359 rpc_clnt_xprt_switch_put(cdata->args.client->cl_rpcclient);
7361 kfree(cdata->res.impl_id);
7362 kfree(cdata->res.server_scope);
7363 kfree(cdata->res.server_owner);
7367 static const struct rpc_call_ops nfs4_exchange_id_call_ops = {
7368 .rpc_call_done = nfs4_exchange_id_done,
7369 .rpc_release = nfs4_exchange_id_release,
7373 * _nfs4_proc_exchange_id()
7375 * Wrapper for EXCHANGE_ID operation.
7377 static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
7378 u32 sp4_how, struct rpc_xprt *xprt)
7380 nfs4_verifier verifier;
7381 struct rpc_message msg = {
7382 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
7385 struct rpc_task_setup task_setup_data = {
7386 .rpc_client = clp->cl_rpcclient,
7387 .callback_ops = &nfs4_exchange_id_call_ops,
7388 .rpc_message = &msg,
7389 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
7391 struct nfs41_exchange_id_data *calldata;
7392 struct rpc_task *task;
7395 if (!atomic_inc_not_zero(&clp->cl_count))
7399 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7404 nfs4_init_boot_verifier(clp, &verifier);
7406 status = nfs4_init_uniform_client_string(clp);
7410 dprintk("NFS call exchange_id auth=%s, '%s'\n",
7411 clp->cl_rpcclient->cl_auth->au_ops->au_name,
7414 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
7417 if (unlikely(calldata->res.server_owner == NULL))
7420 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
7422 if (unlikely(calldata->res.server_scope == NULL))
7423 goto out_server_owner;
7425 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
7426 if (unlikely(calldata->res.impl_id == NULL))
7427 goto out_server_scope;
7431 calldata->args.state_protect.how = SP4_NONE;
7435 calldata->args.state_protect = nfs4_sp4_mach_cred_request;
7445 calldata->xprt = xprt;
7446 task_setup_data.rpc_xprt = xprt;
7447 task_setup_data.flags =
7448 RPC_TASK_SOFT|RPC_TASK_SOFTCONN|RPC_TASK_ASYNC;
7449 calldata->args.verifier = &clp->cl_confirm;
7451 calldata->args.verifier = &verifier;
7453 calldata->args.client = clp;
7454 #ifdef CONFIG_NFS_V4_1_MIGRATION
7455 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7456 EXCHGID4_FLAG_BIND_PRINC_STATEID |
7457 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
7459 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7460 EXCHGID4_FLAG_BIND_PRINC_STATEID,
7462 msg.rpc_argp = &calldata->args;
7463 msg.rpc_resp = &calldata->res;
7464 task_setup_data.callback_data = calldata;
7466 task = rpc_run_task(&task_setup_data);
7468 status = PTR_ERR(task);
7473 status = rpc_wait_for_completion_task(task);
7475 status = calldata->rpc_status;
7476 } else /* session trunking test */
7477 status = calldata->rpc_status;
7481 if (clp->cl_implid != NULL)
7482 dprintk("NFS reply exchange_id: Server Implementation ID: "
7483 "domain: %s, name: %s, date: %llu,%u\n",
7484 clp->cl_implid->domain, clp->cl_implid->name,
7485 clp->cl_implid->date.seconds,
7486 clp->cl_implid->date.nseconds);
7487 dprintk("NFS reply exchange_id: %d\n", status);
7491 kfree(calldata->res.impl_id);
7493 kfree(calldata->res.server_scope);
7495 kfree(calldata->res.server_owner);
7502 * nfs4_proc_exchange_id()
7504 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7506 * Since the clientid has expired, all compounds using sessions
7507 * associated with the stale clientid will be returning
7508 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7509 * be in some phase of session reset.
7511 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7513 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7515 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7518 /* try SP4_MACH_CRED if krb5i/p */
7519 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7520 authflavor == RPC_AUTH_GSS_KRB5P) {
7521 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED, NULL);
7527 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE, NULL);
7531 * nfs4_test_session_trunk
7533 * This is an add_xprt_test() test function called from
7534 * rpc_clnt_setup_test_and_add_xprt.
7536 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt
7537 * and is dereferrenced in nfs4_exchange_id_release
7539 * Upon success, add the new transport to the rpc_clnt
7541 * @clnt: struct rpc_clnt to get new transport
7542 * @xprt: the rpc_xprt to test
7543 * @data: call data for _nfs4_proc_exchange_id.
7545 int nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt,
7548 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data;
7551 dprintk("--> %s try %s\n", __func__,
7552 xprt->address_strings[RPC_DISPLAY_ADDR]);
7554 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED);
7556 /* Test connection for session trunking. Async exchange_id call */
7557 return _nfs4_proc_exchange_id(adata->clp, adata->cred, sp4_how, xprt);
7559 EXPORT_SYMBOL_GPL(nfs4_test_session_trunk);
7561 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7562 struct rpc_cred *cred)
7564 struct rpc_message msg = {
7565 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7571 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7572 trace_nfs4_destroy_clientid(clp, status);
7574 dprintk("NFS: Got error %d from the server %s on "
7575 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7579 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7580 struct rpc_cred *cred)
7585 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7586 ret = _nfs4_proc_destroy_clientid(clp, cred);
7588 case -NFS4ERR_DELAY:
7589 case -NFS4ERR_CLIENTID_BUSY:
7599 int nfs4_destroy_clientid(struct nfs_client *clp)
7601 struct rpc_cred *cred;
7604 if (clp->cl_mvops->minor_version < 1)
7606 if (clp->cl_exchange_flags == 0)
7608 if (clp->cl_preserve_clid)
7610 cred = nfs4_get_clid_cred(clp);
7611 ret = nfs4_proc_destroy_clientid(clp, cred);
7616 case -NFS4ERR_STALE_CLIENTID:
7617 clp->cl_exchange_flags = 0;
7623 struct nfs4_get_lease_time_data {
7624 struct nfs4_get_lease_time_args *args;
7625 struct nfs4_get_lease_time_res *res;
7626 struct nfs_client *clp;
7629 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7632 struct nfs4_get_lease_time_data *data =
7633 (struct nfs4_get_lease_time_data *)calldata;
7635 dprintk("--> %s\n", __func__);
7636 /* just setup sequence, do not trigger session recovery
7637 since we're invoked within one */
7638 nfs41_setup_sequence(data->clp->cl_session,
7639 &data->args->la_seq_args,
7640 &data->res->lr_seq_res,
7642 dprintk("<-- %s\n", __func__);
7646 * Called from nfs4_state_manager thread for session setup, so don't recover
7647 * from sequence operation or clientid errors.
7649 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7651 struct nfs4_get_lease_time_data *data =
7652 (struct nfs4_get_lease_time_data *)calldata;
7654 dprintk("--> %s\n", __func__);
7655 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7657 switch (task->tk_status) {
7658 case -NFS4ERR_DELAY:
7659 case -NFS4ERR_GRACE:
7660 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7661 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7662 task->tk_status = 0;
7664 case -NFS4ERR_RETRY_UNCACHED_REP:
7665 rpc_restart_call_prepare(task);
7668 dprintk("<-- %s\n", __func__);
7671 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
7672 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7673 .rpc_call_done = nfs4_get_lease_time_done,
7676 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7678 struct rpc_task *task;
7679 struct nfs4_get_lease_time_args args;
7680 struct nfs4_get_lease_time_res res = {
7681 .lr_fsinfo = fsinfo,
7683 struct nfs4_get_lease_time_data data = {
7688 struct rpc_message msg = {
7689 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7693 struct rpc_task_setup task_setup = {
7694 .rpc_client = clp->cl_rpcclient,
7695 .rpc_message = &msg,
7696 .callback_ops = &nfs4_get_lease_time_ops,
7697 .callback_data = &data,
7698 .flags = RPC_TASK_TIMEOUT,
7702 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
7703 nfs4_set_sequence_privileged(&args.la_seq_args);
7704 dprintk("--> %s\n", __func__);
7705 task = rpc_run_task(&task_setup);
7708 status = PTR_ERR(task);
7710 status = task->tk_status;
7713 dprintk("<-- %s return %d\n", __func__, status);
7719 * Initialize the values to be used by the client in CREATE_SESSION
7720 * If nfs4_init_session set the fore channel request and response sizes,
7723 * Set the back channel max_resp_sz_cached to zero to force the client to
7724 * always set csa_cachethis to FALSE because the current implementation
7725 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7727 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args,
7728 struct rpc_clnt *clnt)
7730 unsigned int max_rqst_sz, max_resp_sz;
7731 unsigned int max_bc_payload = rpc_max_bc_payload(clnt);
7733 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7734 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
7736 /* Fore channel attributes */
7737 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7738 args->fc_attrs.max_resp_sz = max_resp_sz;
7739 args->fc_attrs.max_ops = NFS4_MAX_OPS;
7740 args->fc_attrs.max_reqs = max_session_slots;
7742 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
7743 "max_ops=%u max_reqs=%u\n",
7745 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
7746 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
7748 /* Back channel attributes */
7749 args->bc_attrs.max_rqst_sz = max_bc_payload;
7750 args->bc_attrs.max_resp_sz = max_bc_payload;
7751 args->bc_attrs.max_resp_sz_cached = 0;
7752 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7753 args->bc_attrs.max_reqs = min_t(unsigned short, max_session_cb_slots, 1);
7755 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7756 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7758 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7759 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7760 args->bc_attrs.max_reqs);
7763 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7764 struct nfs41_create_session_res *res)
7766 struct nfs4_channel_attrs *sent = &args->fc_attrs;
7767 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
7769 if (rcvd->max_resp_sz > sent->max_resp_sz)
7772 * Our requested max_ops is the minimum we need; we're not
7773 * prepared to break up compounds into smaller pieces than that.
7774 * So, no point even trying to continue if the server won't
7777 if (rcvd->max_ops < sent->max_ops)
7779 if (rcvd->max_reqs == 0)
7781 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7782 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
7786 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7787 struct nfs41_create_session_res *res)
7789 struct nfs4_channel_attrs *sent = &args->bc_attrs;
7790 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
7792 if (!(res->flags & SESSION4_BACK_CHAN))
7794 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7796 if (rcvd->max_resp_sz < sent->max_resp_sz)
7798 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7800 if (rcvd->max_ops > sent->max_ops)
7802 if (rcvd->max_reqs > sent->max_reqs)
7808 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7809 struct nfs41_create_session_res *res)
7813 ret = nfs4_verify_fore_channel_attrs(args, res);
7816 return nfs4_verify_back_channel_attrs(args, res);
7819 static void nfs4_update_session(struct nfs4_session *session,
7820 struct nfs41_create_session_res *res)
7822 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
7823 /* Mark client id and session as being confirmed */
7824 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7825 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
7826 session->flags = res->flags;
7827 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
7828 if (res->flags & SESSION4_BACK_CHAN)
7829 memcpy(&session->bc_attrs, &res->bc_attrs,
7830 sizeof(session->bc_attrs));
7833 static int _nfs4_proc_create_session(struct nfs_client *clp,
7834 struct rpc_cred *cred)
7836 struct nfs4_session *session = clp->cl_session;
7837 struct nfs41_create_session_args args = {
7839 .clientid = clp->cl_clientid,
7840 .seqid = clp->cl_seqid,
7841 .cb_program = NFS4_CALLBACK,
7843 struct nfs41_create_session_res res;
7845 struct rpc_message msg = {
7846 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7853 nfs4_init_channel_attrs(&args, clp->cl_rpcclient);
7854 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
7856 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7857 trace_nfs4_create_session(clp, status);
7860 case -NFS4ERR_STALE_CLIENTID:
7861 case -NFS4ERR_DELAY:
7870 /* Verify the session's negotiated channel_attrs values */
7871 status = nfs4_verify_channel_attrs(&args, &res);
7872 /* Increment the clientid slot sequence id */
7875 nfs4_update_session(session, &res);
7882 * Issues a CREATE_SESSION operation to the server.
7883 * It is the responsibility of the caller to verify the session is
7884 * expired before calling this routine.
7886 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
7890 struct nfs4_session *session = clp->cl_session;
7892 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7894 status = _nfs4_proc_create_session(clp, cred);
7898 /* Init or reset the session slot tables */
7899 status = nfs4_setup_session_slot_tables(session);
7900 dprintk("slot table setup returned %d\n", status);
7904 ptr = (unsigned *)&session->sess_id.data[0];
7905 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7906 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
7908 dprintk("<-- %s\n", __func__);
7913 * Issue the over-the-wire RPC DESTROY_SESSION.
7914 * The caller must serialize access to this routine.
7916 int nfs4_proc_destroy_session(struct nfs4_session *session,
7917 struct rpc_cred *cred)
7919 struct rpc_message msg = {
7920 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7921 .rpc_argp = session,
7926 dprintk("--> nfs4_proc_destroy_session\n");
7928 /* session is still being setup */
7929 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
7932 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7933 trace_nfs4_destroy_session(session->clp, status);
7936 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
7937 "Session has been destroyed regardless...\n", status);
7939 dprintk("<-- nfs4_proc_destroy_session\n");
7944 * Renew the cl_session lease.
7946 struct nfs4_sequence_data {
7947 struct nfs_client *clp;
7948 struct nfs4_sequence_args args;
7949 struct nfs4_sequence_res res;
7952 static void nfs41_sequence_release(void *data)
7954 struct nfs4_sequence_data *calldata = data;
7955 struct nfs_client *clp = calldata->clp;
7957 if (atomic_read(&clp->cl_count) > 1)
7958 nfs4_schedule_state_renewal(clp);
7959 nfs_put_client(clp);
7963 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7965 switch(task->tk_status) {
7966 case -NFS4ERR_DELAY:
7967 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7970 nfs4_schedule_lease_recovery(clp);
7975 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
7977 struct nfs4_sequence_data *calldata = data;
7978 struct nfs_client *clp = calldata->clp;
7980 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7983 trace_nfs4_sequence(clp, task->tk_status);
7984 if (task->tk_status < 0) {
7985 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7986 if (atomic_read(&clp->cl_count) == 1)
7989 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7990 rpc_restart_call_prepare(task);
7994 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7996 dprintk("<-- %s\n", __func__);
7999 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
8001 struct nfs4_sequence_data *calldata = data;
8002 struct nfs_client *clp = calldata->clp;
8003 struct nfs4_sequence_args *args;
8004 struct nfs4_sequence_res *res;
8006 args = task->tk_msg.rpc_argp;
8007 res = task->tk_msg.rpc_resp;
8009 nfs41_setup_sequence(clp->cl_session, args, res, task);
8012 static const struct rpc_call_ops nfs41_sequence_ops = {
8013 .rpc_call_done = nfs41_sequence_call_done,
8014 .rpc_call_prepare = nfs41_sequence_prepare,
8015 .rpc_release = nfs41_sequence_release,
8018 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
8019 struct rpc_cred *cred,
8022 struct nfs4_sequence_data *calldata;
8023 struct rpc_message msg = {
8024 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
8027 struct rpc_task_setup task_setup_data = {
8028 .rpc_client = clp->cl_rpcclient,
8029 .rpc_message = &msg,
8030 .callback_ops = &nfs41_sequence_ops,
8031 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
8034 if (!atomic_inc_not_zero(&clp->cl_count))
8035 return ERR_PTR(-EIO);
8036 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
8037 if (calldata == NULL) {
8038 nfs_put_client(clp);
8039 return ERR_PTR(-ENOMEM);
8041 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8043 nfs4_set_sequence_privileged(&calldata->args);
8044 msg.rpc_argp = &calldata->args;
8045 msg.rpc_resp = &calldata->res;
8046 calldata->clp = clp;
8047 task_setup_data.callback_data = calldata;
8049 return rpc_run_task(&task_setup_data);
8052 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
8054 struct rpc_task *task;
8057 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
8059 task = _nfs41_proc_sequence(clp, cred, false);
8061 ret = PTR_ERR(task);
8063 rpc_put_task_async(task);
8064 dprintk("<-- %s status=%d\n", __func__, ret);
8068 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
8070 struct rpc_task *task;
8073 task = _nfs41_proc_sequence(clp, cred, true);
8075 ret = PTR_ERR(task);
8078 ret = rpc_wait_for_completion_task(task);
8080 ret = task->tk_status;
8083 dprintk("<-- %s status=%d\n", __func__, ret);
8087 struct nfs4_reclaim_complete_data {
8088 struct nfs_client *clp;
8089 struct nfs41_reclaim_complete_args arg;
8090 struct nfs41_reclaim_complete_res res;
8093 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
8095 struct nfs4_reclaim_complete_data *calldata = data;
8097 nfs41_setup_sequence(calldata->clp->cl_session,
8098 &calldata->arg.seq_args,
8099 &calldata->res.seq_res,
8103 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8105 switch(task->tk_status) {
8107 case -NFS4ERR_COMPLETE_ALREADY:
8108 case -NFS4ERR_WRONG_CRED: /* What to do here? */
8110 case -NFS4ERR_DELAY:
8111 rpc_delay(task, NFS4_POLL_RETRY_MAX);
8113 case -NFS4ERR_RETRY_UNCACHED_REP:
8116 nfs4_schedule_lease_recovery(clp);
8121 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
8123 struct nfs4_reclaim_complete_data *calldata = data;
8124 struct nfs_client *clp = calldata->clp;
8125 struct nfs4_sequence_res *res = &calldata->res.seq_res;
8127 dprintk("--> %s\n", __func__);
8128 if (!nfs41_sequence_done(task, res))
8131 trace_nfs4_reclaim_complete(clp, task->tk_status);
8132 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
8133 rpc_restart_call_prepare(task);
8136 dprintk("<-- %s\n", __func__);
8139 static void nfs4_free_reclaim_complete_data(void *data)
8141 struct nfs4_reclaim_complete_data *calldata = data;
8146 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
8147 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
8148 .rpc_call_done = nfs4_reclaim_complete_done,
8149 .rpc_release = nfs4_free_reclaim_complete_data,
8153 * Issue a global reclaim complete.
8155 static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
8156 struct rpc_cred *cred)
8158 struct nfs4_reclaim_complete_data *calldata;
8159 struct rpc_task *task;
8160 struct rpc_message msg = {
8161 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
8164 struct rpc_task_setup task_setup_data = {
8165 .rpc_client = clp->cl_rpcclient,
8166 .rpc_message = &msg,
8167 .callback_ops = &nfs4_reclaim_complete_call_ops,
8168 .flags = RPC_TASK_ASYNC,
8170 int status = -ENOMEM;
8172 dprintk("--> %s\n", __func__);
8173 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
8174 if (calldata == NULL)
8176 calldata->clp = clp;
8177 calldata->arg.one_fs = 0;
8179 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8180 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
8181 msg.rpc_argp = &calldata->arg;
8182 msg.rpc_resp = &calldata->res;
8183 task_setup_data.callback_data = calldata;
8184 task = rpc_run_task(&task_setup_data);
8186 status = PTR_ERR(task);
8189 status = nfs4_wait_for_completion_rpc_task(task);
8191 status = task->tk_status;
8195 dprintk("<-- %s status=%d\n", __func__, status);
8200 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
8202 struct nfs4_layoutget *lgp = calldata;
8203 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
8204 struct nfs4_session *session = nfs4_get_session(server);
8206 dprintk("--> %s\n", __func__);
8207 nfs41_setup_sequence(session, &lgp->args.seq_args,
8208 &lgp->res.seq_res, task);
8209 dprintk("<-- %s\n", __func__);
8212 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
8214 struct nfs4_layoutget *lgp = calldata;
8216 dprintk("--> %s\n", __func__);
8217 nfs41_sequence_process(task, &lgp->res.seq_res);
8218 dprintk("<-- %s\n", __func__);
8222 nfs4_layoutget_handle_exception(struct rpc_task *task,
8223 struct nfs4_layoutget *lgp, struct nfs4_exception *exception)
8225 struct inode *inode = lgp->args.inode;
8226 struct nfs_server *server = NFS_SERVER(inode);
8227 struct pnfs_layout_hdr *lo;
8228 int nfs4err = task->tk_status;
8229 int err, status = 0;
8232 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
8239 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
8240 * on the file. set tk_status to -ENODATA to tell upper layer to
8243 case -NFS4ERR_LAYOUTUNAVAILABLE:
8247 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
8248 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
8250 case -NFS4ERR_BADLAYOUT:
8251 status = -EOVERFLOW;
8254 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
8255 * (or clients) writing to the same RAID stripe except when
8256 * the minlength argument is 0 (see RFC5661 section 18.43.3).
8258 * Treat it like we would RECALLCONFLICT -- we retry for a little
8259 * while, and then eventually give up.
8261 case -NFS4ERR_LAYOUTTRYLATER:
8262 if (lgp->args.minlength == 0) {
8263 status = -EOVERFLOW;
8268 case -NFS4ERR_RECALLCONFLICT:
8269 status = -ERECALLCONFLICT;
8271 case -NFS4ERR_EXPIRED:
8272 case -NFS4ERR_BAD_STATEID:
8273 exception->timeout = 0;
8274 spin_lock(&inode->i_lock);
8275 lo = NFS_I(inode)->layout;
8276 /* If the open stateid was bad, then recover it. */
8277 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
8278 nfs4_stateid_match_other(&lgp->args.stateid,
8279 &lgp->args.ctx->state->stateid)) {
8280 spin_unlock(&inode->i_lock);
8281 exception->state = lgp->args.ctx->state;
8286 * Mark the bad layout state as invalid, then retry
8288 pnfs_mark_layout_stateid_invalid(lo, &head);
8289 spin_unlock(&inode->i_lock);
8290 pnfs_free_lseg_list(&head);
8295 err = nfs4_handle_exception(server, nfs4err, exception);
8297 if (exception->retry)
8303 dprintk("<-- %s\n", __func__);
8307 static size_t max_response_pages(struct nfs_server *server)
8309 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
8310 return nfs_page_array_len(0, max_resp_sz);
8313 static void nfs4_free_pages(struct page **pages, size_t size)
8320 for (i = 0; i < size; i++) {
8323 __free_page(pages[i]);
8328 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
8330 struct page **pages;
8333 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
8335 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
8339 for (i = 0; i < size; i++) {
8340 pages[i] = alloc_page(gfp_flags);
8342 dprintk("%s: failed to allocate page\n", __func__);
8343 nfs4_free_pages(pages, size);
8351 static void nfs4_layoutget_release(void *calldata)
8353 struct nfs4_layoutget *lgp = calldata;
8354 struct inode *inode = lgp->args.inode;
8355 struct nfs_server *server = NFS_SERVER(inode);
8356 size_t max_pages = max_response_pages(server);
8358 dprintk("--> %s\n", __func__);
8359 nfs4_free_pages(lgp->args.layout.pages, max_pages);
8360 pnfs_put_layout_hdr(NFS_I(inode)->layout);
8361 put_nfs_open_context(lgp->args.ctx);
8363 dprintk("<-- %s\n", __func__);
8366 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
8367 .rpc_call_prepare = nfs4_layoutget_prepare,
8368 .rpc_call_done = nfs4_layoutget_done,
8369 .rpc_release = nfs4_layoutget_release,
8372 struct pnfs_layout_segment *
8373 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags)
8375 struct inode *inode = lgp->args.inode;
8376 struct nfs_server *server = NFS_SERVER(inode);
8377 size_t max_pages = max_response_pages(server);
8378 struct rpc_task *task;
8379 struct rpc_message msg = {
8380 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
8381 .rpc_argp = &lgp->args,
8382 .rpc_resp = &lgp->res,
8383 .rpc_cred = lgp->cred,
8385 struct rpc_task_setup task_setup_data = {
8386 .rpc_client = server->client,
8387 .rpc_message = &msg,
8388 .callback_ops = &nfs4_layoutget_call_ops,
8389 .callback_data = lgp,
8390 .flags = RPC_TASK_ASYNC,
8392 struct pnfs_layout_segment *lseg = NULL;
8393 struct nfs4_exception exception = {
8395 .timeout = *timeout,
8399 dprintk("--> %s\n", __func__);
8401 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
8402 pnfs_get_layout_hdr(NFS_I(inode)->layout);
8404 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
8405 if (!lgp->args.layout.pages) {
8406 nfs4_layoutget_release(lgp);
8407 return ERR_PTR(-ENOMEM);
8409 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
8411 lgp->res.layoutp = &lgp->args.layout;
8412 lgp->res.seq_res.sr_slot = NULL;
8413 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
8415 task = rpc_run_task(&task_setup_data);
8417 return ERR_CAST(task);
8418 status = nfs4_wait_for_completion_rpc_task(task);
8420 status = nfs4_layoutget_handle_exception(task, lgp, &exception);
8421 *timeout = exception.timeout;
8424 trace_nfs4_layoutget(lgp->args.ctx,
8430 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8431 if (status == 0 && lgp->res.layoutp->len)
8432 lseg = pnfs_layout_process(lgp);
8433 nfs4_sequence_free_slot(&lgp->res.seq_res);
8435 dprintk("<-- %s status=%d\n", __func__, status);
8437 return ERR_PTR(status);
8442 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8444 struct nfs4_layoutreturn *lrp = calldata;
8446 dprintk("--> %s\n", __func__);
8447 nfs41_setup_sequence(lrp->clp->cl_session,
8448 &lrp->args.seq_args,
8453 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8455 struct nfs4_layoutreturn *lrp = calldata;
8456 struct nfs_server *server;
8458 dprintk("--> %s\n", __func__);
8460 if (!nfs41_sequence_process(task, &lrp->res.seq_res))
8463 server = NFS_SERVER(lrp->args.inode);
8464 switch (task->tk_status) {
8466 task->tk_status = 0;
8469 case -NFS4ERR_DELAY:
8470 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
8472 nfs4_sequence_free_slot(&lrp->res.seq_res);
8473 rpc_restart_call_prepare(task);
8476 dprintk("<-- %s\n", __func__);
8479 static void nfs4_layoutreturn_release(void *calldata)
8481 struct nfs4_layoutreturn *lrp = calldata;
8482 struct pnfs_layout_hdr *lo = lrp->args.layout;
8485 dprintk("--> %s\n", __func__);
8486 spin_lock(&lo->plh_inode->i_lock);
8487 if (lrp->res.lrs_present) {
8488 pnfs_mark_matching_lsegs_invalid(lo, &freeme,
8490 be32_to_cpu(lrp->args.stateid.seqid));
8491 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
8493 pnfs_mark_layout_stateid_invalid(lo, &freeme);
8494 pnfs_clear_layoutreturn_waitbit(lo);
8495 spin_unlock(&lo->plh_inode->i_lock);
8496 nfs4_sequence_free_slot(&lrp->res.seq_res);
8497 pnfs_free_lseg_list(&freeme);
8498 pnfs_put_layout_hdr(lrp->args.layout);
8499 nfs_iput_and_deactive(lrp->inode);
8501 dprintk("<-- %s\n", __func__);
8504 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8505 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8506 .rpc_call_done = nfs4_layoutreturn_done,
8507 .rpc_release = nfs4_layoutreturn_release,
8510 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
8512 struct rpc_task *task;
8513 struct rpc_message msg = {
8514 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8515 .rpc_argp = &lrp->args,
8516 .rpc_resp = &lrp->res,
8517 .rpc_cred = lrp->cred,
8519 struct rpc_task_setup task_setup_data = {
8520 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
8521 .rpc_message = &msg,
8522 .callback_ops = &nfs4_layoutreturn_call_ops,
8523 .callback_data = lrp,
8527 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
8528 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
8529 &task_setup_data.rpc_client, &msg);
8531 dprintk("--> %s\n", __func__);
8533 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8535 nfs4_layoutreturn_release(lrp);
8538 task_setup_data.flags |= RPC_TASK_ASYNC;
8540 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
8541 task = rpc_run_task(&task_setup_data);
8543 return PTR_ERR(task);
8545 status = task->tk_status;
8546 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
8547 dprintk("<-- %s status=%d\n", __func__, status);
8553 _nfs4_proc_getdeviceinfo(struct nfs_server *server,
8554 struct pnfs_device *pdev,
8555 struct rpc_cred *cred)
8557 struct nfs4_getdeviceinfo_args args = {
8559 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8560 NOTIFY_DEVICEID4_DELETE,
8562 struct nfs4_getdeviceinfo_res res = {
8565 struct rpc_message msg = {
8566 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8573 dprintk("--> %s\n", __func__);
8574 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
8575 if (res.notification & ~args.notify_types)
8576 dprintk("%s: unsupported notification\n", __func__);
8577 if (res.notification != args.notify_types)
8580 dprintk("<-- %s status=%d\n", __func__, status);
8585 int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8586 struct pnfs_device *pdev,
8587 struct rpc_cred *cred)
8589 struct nfs4_exception exception = { };
8593 err = nfs4_handle_exception(server,
8594 _nfs4_proc_getdeviceinfo(server, pdev, cred),
8596 } while (exception.retry);
8599 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8601 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8603 struct nfs4_layoutcommit_data *data = calldata;
8604 struct nfs_server *server = NFS_SERVER(data->args.inode);
8605 struct nfs4_session *session = nfs4_get_session(server);
8607 nfs41_setup_sequence(session,
8608 &data->args.seq_args,
8614 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8616 struct nfs4_layoutcommit_data *data = calldata;
8617 struct nfs_server *server = NFS_SERVER(data->args.inode);
8619 if (!nfs41_sequence_done(task, &data->res.seq_res))
8622 switch (task->tk_status) { /* Just ignore these failures */
8623 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8624 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8625 case -NFS4ERR_BADLAYOUT: /* no layout */
8626 case -NFS4ERR_GRACE: /* loca_recalim always false */
8627 task->tk_status = 0;
8631 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
8632 rpc_restart_call_prepare(task);
8638 static void nfs4_layoutcommit_release(void *calldata)
8640 struct nfs4_layoutcommit_data *data = calldata;
8642 pnfs_cleanup_layoutcommit(data);
8643 nfs_post_op_update_inode_force_wcc(data->args.inode,
8645 put_rpccred(data->cred);
8646 nfs_iput_and_deactive(data->inode);
8650 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8651 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8652 .rpc_call_done = nfs4_layoutcommit_done,
8653 .rpc_release = nfs4_layoutcommit_release,
8657 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
8659 struct rpc_message msg = {
8660 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8661 .rpc_argp = &data->args,
8662 .rpc_resp = &data->res,
8663 .rpc_cred = data->cred,
8665 struct rpc_task_setup task_setup_data = {
8666 .task = &data->task,
8667 .rpc_client = NFS_CLIENT(data->args.inode),
8668 .rpc_message = &msg,
8669 .callback_ops = &nfs4_layoutcommit_ops,
8670 .callback_data = data,
8672 struct rpc_task *task;
8675 dprintk("NFS: initiating layoutcommit call. sync %d "
8676 "lbw: %llu inode %lu\n", sync,
8677 data->args.lastbytewritten,
8678 data->args.inode->i_ino);
8681 data->inode = nfs_igrab_and_active(data->args.inode);
8682 if (data->inode == NULL) {
8683 nfs4_layoutcommit_release(data);
8686 task_setup_data.flags = RPC_TASK_ASYNC;
8688 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
8689 task = rpc_run_task(&task_setup_data);
8691 return PTR_ERR(task);
8693 status = task->tk_status;
8694 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
8695 dprintk("%s: status %d\n", __func__, status);
8701 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8702 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8705 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8706 struct nfs_fsinfo *info,
8707 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
8709 struct nfs41_secinfo_no_name_args args = {
8710 .style = SECINFO_STYLE_CURRENT_FH,
8712 struct nfs4_secinfo_res res = {
8715 struct rpc_message msg = {
8716 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8720 struct rpc_clnt *clnt = server->client;
8721 struct rpc_cred *cred = NULL;
8724 if (use_integrity) {
8725 clnt = server->nfs_client->cl_rpcclient;
8726 cred = nfs4_get_clid_cred(server->nfs_client);
8727 msg.rpc_cred = cred;
8730 dprintk("--> %s\n", __func__);
8731 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8733 dprintk("<-- %s status=%d\n", __func__, status);
8742 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8743 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8745 struct nfs4_exception exception = { };
8748 /* first try using integrity protection */
8749 err = -NFS4ERR_WRONGSEC;
8751 /* try to use integrity protection with machine cred */
8752 if (_nfs4_is_integrity_protected(server->nfs_client))
8753 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8757 * if unable to use integrity protection, or SECINFO with
8758 * integrity protection returns NFS4ERR_WRONGSEC (which is
8759 * disallowed by spec, but exists in deployed servers) use
8760 * the current filesystem's rpc_client and the user cred.
8762 if (err == -NFS4ERR_WRONGSEC)
8763 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8768 case -NFS4ERR_WRONGSEC:
8772 err = nfs4_handle_exception(server, err, &exception);
8774 } while (exception.retry);
8780 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8781 struct nfs_fsinfo *info)
8785 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
8786 struct nfs4_secinfo_flavors *flavors;
8787 struct nfs4_secinfo4 *secinfo;
8790 page = alloc_page(GFP_KERNEL);
8796 flavors = page_address(page);
8797 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8800 * Fall back on "guess and check" method if
8801 * the server doesn't support SECINFO_NO_NAME
8803 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
8804 err = nfs4_find_root_sec(server, fhandle, info);
8810 for (i = 0; i < flavors->num_flavors; i++) {
8811 secinfo = &flavors->flavors[i];
8813 switch (secinfo->flavor) {
8817 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8818 &secinfo->flavor_info);
8821 flavor = RPC_AUTH_MAXFLAVOR;
8825 if (!nfs_auth_info_match(&server->auth_info, flavor))
8826 flavor = RPC_AUTH_MAXFLAVOR;
8828 if (flavor != RPC_AUTH_MAXFLAVOR) {
8829 err = nfs4_lookup_root_sec(server, fhandle,
8836 if (flavor == RPC_AUTH_MAXFLAVOR)
8847 static int _nfs41_test_stateid(struct nfs_server *server,
8848 nfs4_stateid *stateid,
8849 struct rpc_cred *cred)
8852 struct nfs41_test_stateid_args args = {
8855 struct nfs41_test_stateid_res res;
8856 struct rpc_message msg = {
8857 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8862 struct rpc_clnt *rpc_client = server->client;
8864 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8867 dprintk("NFS call test_stateid %p\n", stateid);
8868 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8869 nfs4_set_sequence_privileged(&args.seq_args);
8870 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8871 &args.seq_args, &res.seq_res);
8872 if (status != NFS_OK) {
8873 dprintk("NFS reply test_stateid: failed, %d\n", status);
8876 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
8880 static void nfs4_handle_delay_or_session_error(struct nfs_server *server,
8881 int err, struct nfs4_exception *exception)
8883 exception->retry = 0;
8885 case -NFS4ERR_DELAY:
8886 nfs4_handle_exception(server, err, exception);
8888 case -NFS4ERR_BADSESSION:
8889 case -NFS4ERR_BADSLOT:
8890 case -NFS4ERR_BAD_HIGH_SLOT:
8891 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
8892 case -NFS4ERR_DEADSESSION:
8893 nfs4_do_handle_exception(server, err, exception);
8898 * nfs41_test_stateid - perform a TEST_STATEID operation
8900 * @server: server / transport on which to perform the operation
8901 * @stateid: state ID to test
8904 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8905 * Otherwise a negative NFS4ERR value is returned if the operation
8906 * failed or the state ID is not currently valid.
8908 static int nfs41_test_stateid(struct nfs_server *server,
8909 nfs4_stateid *stateid,
8910 struct rpc_cred *cred)
8912 struct nfs4_exception exception = { };
8915 err = _nfs41_test_stateid(server, stateid, cred);
8916 nfs4_handle_delay_or_session_error(server, err, &exception);
8917 } while (exception.retry);
8921 struct nfs_free_stateid_data {
8922 struct nfs_server *server;
8923 struct nfs41_free_stateid_args args;
8924 struct nfs41_free_stateid_res res;
8927 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8929 struct nfs_free_stateid_data *data = calldata;
8930 nfs41_setup_sequence(nfs4_get_session(data->server),
8931 &data->args.seq_args,
8936 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8938 struct nfs_free_stateid_data *data = calldata;
8940 nfs41_sequence_done(task, &data->res.seq_res);
8942 switch (task->tk_status) {
8943 case -NFS4ERR_DELAY:
8944 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
8945 rpc_restart_call_prepare(task);
8949 static void nfs41_free_stateid_release(void *calldata)
8954 static const struct rpc_call_ops nfs41_free_stateid_ops = {
8955 .rpc_call_prepare = nfs41_free_stateid_prepare,
8956 .rpc_call_done = nfs41_free_stateid_done,
8957 .rpc_release = nfs41_free_stateid_release,
8960 static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8961 const nfs4_stateid *stateid,
8962 struct rpc_cred *cred,
8965 struct rpc_message msg = {
8966 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
8969 struct rpc_task_setup task_setup = {
8970 .rpc_client = server->client,
8971 .rpc_message = &msg,
8972 .callback_ops = &nfs41_free_stateid_ops,
8973 .flags = RPC_TASK_ASYNC,
8975 struct nfs_free_stateid_data *data;
8977 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8978 &task_setup.rpc_client, &msg);
8980 dprintk("NFS call free_stateid %p\n", stateid);
8981 data = kmalloc(sizeof(*data), GFP_NOFS);
8983 return ERR_PTR(-ENOMEM);
8984 data->server = server;
8985 nfs4_stateid_copy(&data->args.stateid, stateid);
8987 task_setup.callback_data = data;
8989 msg.rpc_argp = &data->args;
8990 msg.rpc_resp = &data->res;
8991 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
8993 nfs4_set_sequence_privileged(&data->args.seq_args);
8995 return rpc_run_task(&task_setup);
8999 * nfs41_free_stateid - perform a FREE_STATEID operation
9001 * @server: server / transport on which to perform the operation
9002 * @stateid: state ID to release
9004 * @is_recovery: set to true if this call needs to be privileged
9006 * Note: this function is always asynchronous.
9008 static int nfs41_free_stateid(struct nfs_server *server,
9009 const nfs4_stateid *stateid,
9010 struct rpc_cred *cred,
9013 struct rpc_task *task;
9015 task = _nfs41_free_stateid(server, stateid, cred, is_recovery);
9017 return PTR_ERR(task);
9023 nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
9025 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
9027 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
9028 nfs4_free_lock_state(server, lsp);
9031 static bool nfs41_match_stateid(const nfs4_stateid *s1,
9032 const nfs4_stateid *s2)
9034 if (s1->type != s2->type)
9037 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
9040 if (s1->seqid == s2->seqid)
9042 if (s1->seqid == 0 || s2->seqid == 0)
9048 #endif /* CONFIG_NFS_V4_1 */
9050 static bool nfs4_match_stateid(const nfs4_stateid *s1,
9051 const nfs4_stateid *s2)
9053 return nfs4_stateid_match(s1, s2);
9057 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
9058 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9059 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9060 .recover_open = nfs4_open_reclaim,
9061 .recover_lock = nfs4_lock_reclaim,
9062 .establish_clid = nfs4_init_clientid,
9063 .detect_trunking = nfs40_discover_server_trunking,
9066 #if defined(CONFIG_NFS_V4_1)
9067 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
9068 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9069 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9070 .recover_open = nfs4_open_reclaim,
9071 .recover_lock = nfs4_lock_reclaim,
9072 .establish_clid = nfs41_init_clientid,
9073 .reclaim_complete = nfs41_proc_reclaim_complete,
9074 .detect_trunking = nfs41_discover_server_trunking,
9076 #endif /* CONFIG_NFS_V4_1 */
9078 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
9079 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9080 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
9081 .recover_open = nfs40_open_expired,
9082 .recover_lock = nfs4_lock_expired,
9083 .establish_clid = nfs4_init_clientid,
9086 #if defined(CONFIG_NFS_V4_1)
9087 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
9088 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9089 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
9090 .recover_open = nfs41_open_expired,
9091 .recover_lock = nfs41_lock_expired,
9092 .establish_clid = nfs41_init_clientid,
9094 #endif /* CONFIG_NFS_V4_1 */
9096 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
9097 .sched_state_renewal = nfs4_proc_async_renew,
9098 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
9099 .renew_lease = nfs4_proc_renew,
9102 #if defined(CONFIG_NFS_V4_1)
9103 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
9104 .sched_state_renewal = nfs41_proc_async_sequence,
9105 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
9106 .renew_lease = nfs4_proc_sequence,
9110 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
9111 .get_locations = _nfs40_proc_get_locations,
9112 .fsid_present = _nfs40_proc_fsid_present,
9115 #if defined(CONFIG_NFS_V4_1)
9116 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
9117 .get_locations = _nfs41_proc_get_locations,
9118 .fsid_present = _nfs41_proc_fsid_present,
9120 #endif /* CONFIG_NFS_V4_1 */
9122 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
9124 .init_caps = NFS_CAP_READDIRPLUS
9125 | NFS_CAP_ATOMIC_OPEN
9126 | NFS_CAP_POSIX_LOCK,
9127 .init_client = nfs40_init_client,
9128 .shutdown_client = nfs40_shutdown_client,
9129 .match_stateid = nfs4_match_stateid,
9130 .find_root_sec = nfs4_find_root_sec,
9131 .free_lock_state = nfs4_release_lockowner,
9132 .test_and_free_expired = nfs40_test_and_free_expired_stateid,
9133 .alloc_seqid = nfs_alloc_seqid,
9134 .call_sync_ops = &nfs40_call_sync_ops,
9135 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
9136 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
9137 .state_renewal_ops = &nfs40_state_renewal_ops,
9138 .mig_recovery_ops = &nfs40_mig_recovery_ops,
9141 #if defined(CONFIG_NFS_V4_1)
9142 static struct nfs_seqid *
9143 nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
9148 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
9150 .init_caps = NFS_CAP_READDIRPLUS
9151 | NFS_CAP_ATOMIC_OPEN
9152 | NFS_CAP_POSIX_LOCK
9153 | NFS_CAP_STATEID_NFSV41
9154 | NFS_CAP_ATOMIC_OPEN_V1,
9155 .init_client = nfs41_init_client,
9156 .shutdown_client = nfs41_shutdown_client,
9157 .match_stateid = nfs41_match_stateid,
9158 .find_root_sec = nfs41_find_root_sec,
9159 .free_lock_state = nfs41_free_lock_state,
9160 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
9161 .alloc_seqid = nfs_alloc_no_seqid,
9162 .session_trunk = nfs4_test_session_trunk,
9163 .call_sync_ops = &nfs41_call_sync_ops,
9164 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9165 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9166 .state_renewal_ops = &nfs41_state_renewal_ops,
9167 .mig_recovery_ops = &nfs41_mig_recovery_ops,
9171 #if defined(CONFIG_NFS_V4_2)
9172 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
9174 .init_caps = NFS_CAP_READDIRPLUS
9175 | NFS_CAP_ATOMIC_OPEN
9176 | NFS_CAP_POSIX_LOCK
9177 | NFS_CAP_STATEID_NFSV41
9178 | NFS_CAP_ATOMIC_OPEN_V1
9181 | NFS_CAP_DEALLOCATE
9183 | NFS_CAP_LAYOUTSTATS
9185 .init_client = nfs41_init_client,
9186 .shutdown_client = nfs41_shutdown_client,
9187 .match_stateid = nfs41_match_stateid,
9188 .find_root_sec = nfs41_find_root_sec,
9189 .free_lock_state = nfs41_free_lock_state,
9190 .call_sync_ops = &nfs41_call_sync_ops,
9191 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
9192 .alloc_seqid = nfs_alloc_no_seqid,
9193 .session_trunk = nfs4_test_session_trunk,
9194 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9195 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9196 .state_renewal_ops = &nfs41_state_renewal_ops,
9197 .mig_recovery_ops = &nfs41_mig_recovery_ops,
9201 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
9202 [0] = &nfs_v4_0_minor_ops,
9203 #if defined(CONFIG_NFS_V4_1)
9204 [1] = &nfs_v4_1_minor_ops,
9206 #if defined(CONFIG_NFS_V4_2)
9207 [2] = &nfs_v4_2_minor_ops,
9211 static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
9213 ssize_t error, error2;
9215 error = generic_listxattr(dentry, list, size);
9223 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
9226 return error + error2;
9229 static const struct inode_operations nfs4_dir_inode_operations = {
9230 .create = nfs_create,
9231 .lookup = nfs_lookup,
9232 .atomic_open = nfs_atomic_open,
9234 .unlink = nfs_unlink,
9235 .symlink = nfs_symlink,
9239 .rename = nfs_rename,
9240 .permission = nfs_permission,
9241 .getattr = nfs_getattr,
9242 .setattr = nfs_setattr,
9243 .getxattr = generic_getxattr,
9244 .setxattr = generic_setxattr,
9245 .listxattr = nfs4_listxattr,
9246 .removexattr = generic_removexattr,
9249 static const struct inode_operations nfs4_file_inode_operations = {
9250 .permission = nfs_permission,
9251 .getattr = nfs_getattr,
9252 .setattr = nfs_setattr,
9253 .getxattr = generic_getxattr,
9254 .setxattr = generic_setxattr,
9255 .listxattr = nfs4_listxattr,
9256 .removexattr = generic_removexattr,
9259 const struct nfs_rpc_ops nfs_v4_clientops = {
9260 .version = 4, /* protocol version */
9261 .dentry_ops = &nfs4_dentry_operations,
9262 .dir_inode_ops = &nfs4_dir_inode_operations,
9263 .file_inode_ops = &nfs4_file_inode_operations,
9264 .file_ops = &nfs4_file_operations,
9265 .getroot = nfs4_proc_get_root,
9266 .submount = nfs4_submount,
9267 .try_mount = nfs4_try_mount,
9268 .getattr = nfs4_proc_getattr,
9269 .setattr = nfs4_proc_setattr,
9270 .lookup = nfs4_proc_lookup,
9271 .access = nfs4_proc_access,
9272 .readlink = nfs4_proc_readlink,
9273 .create = nfs4_proc_create,
9274 .remove = nfs4_proc_remove,
9275 .unlink_setup = nfs4_proc_unlink_setup,
9276 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
9277 .unlink_done = nfs4_proc_unlink_done,
9278 .rename_setup = nfs4_proc_rename_setup,
9279 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
9280 .rename_done = nfs4_proc_rename_done,
9281 .link = nfs4_proc_link,
9282 .symlink = nfs4_proc_symlink,
9283 .mkdir = nfs4_proc_mkdir,
9284 .rmdir = nfs4_proc_remove,
9285 .readdir = nfs4_proc_readdir,
9286 .mknod = nfs4_proc_mknod,
9287 .statfs = nfs4_proc_statfs,
9288 .fsinfo = nfs4_proc_fsinfo,
9289 .pathconf = nfs4_proc_pathconf,
9290 .set_capabilities = nfs4_server_capabilities,
9291 .decode_dirent = nfs4_decode_dirent,
9292 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
9293 .read_setup = nfs4_proc_read_setup,
9294 .read_done = nfs4_read_done,
9295 .write_setup = nfs4_proc_write_setup,
9296 .write_done = nfs4_write_done,
9297 .commit_setup = nfs4_proc_commit_setup,
9298 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
9299 .commit_done = nfs4_commit_done,
9300 .lock = nfs4_proc_lock,
9301 .clear_acl_cache = nfs4_zap_acl_attr,
9302 .close_context = nfs4_close_context,
9303 .open_context = nfs4_atomic_open,
9304 .have_delegation = nfs4_have_delegation,
9305 .return_delegation = nfs4_inode_return_delegation,
9306 .alloc_client = nfs4_alloc_client,
9307 .init_client = nfs4_init_client,
9308 .free_client = nfs4_free_client,
9309 .create_server = nfs4_create_server,
9310 .clone_server = nfs_clone_server,
9313 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
9314 .name = XATTR_NAME_NFSV4_ACL,
9315 .list = nfs4_xattr_list_nfs4_acl,
9316 .get = nfs4_xattr_get_nfs4_acl,
9317 .set = nfs4_xattr_set_nfs4_acl,
9320 const struct xattr_handler *nfs4_xattr_handlers[] = {
9321 &nfs4_xattr_nfs4_acl_handler,
9322 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
9323 &nfs4_xattr_nfs4_label_handler,