4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #include <linux/delay.h>
40 #include <linux/errno.h>
41 #include <linux/string.h>
42 #include <linux/ratelimit.h>
43 #include <linux/printk.h>
44 #include <linux/slab.h>
45 #include <linux/sunrpc/clnt.h>
46 #include <linux/nfs.h>
47 #include <linux/nfs4.h>
48 #include <linux/nfs_fs.h>
49 #include <linux/nfs_page.h>
50 #include <linux/nfs_mount.h>
51 #include <linux/namei.h>
52 #include <linux/mount.h>
53 #include <linux/module.h>
54 #include <linux/xattr.h>
55 #include <linux/utsname.h>
56 #include <linux/freezer.h>
59 #include "delegation.h"
65 #include "nfs4idmap.h"
66 #include "nfs4session.h"
69 #include "nfs4trace.h"
71 #define NFSDBG_FACILITY NFSDBG_PROC
73 #define NFS4_POLL_RETRY_MIN (HZ/10)
74 #define NFS4_POLL_RETRY_MAX (15*HZ)
76 /* file attributes which can be mapped to nfs attributes */
77 #define NFS4_VALID_ATTRS (ATTR_MODE \
88 static int _nfs4_proc_open(struct nfs4_opendata *data);
89 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
90 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
91 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
92 static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
93 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
94 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
95 struct nfs_fattr *fattr, struct iattr *sattr,
96 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
97 struct nfs4_label *olabel);
98 #ifdef CONFIG_NFS_V4_1
99 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
101 static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *,
102 struct rpc_cred *, bool);
105 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
106 static inline struct nfs4_label *
107 nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
108 struct iattr *sattr, struct nfs4_label *label)
115 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
118 err = security_dentry_init_security(dentry, sattr->ia_mode,
119 &dentry->d_name, (void **)&label->label, &label->len);
126 nfs4_label_release_security(struct nfs4_label *label)
129 security_release_secctx(label->label, label->len);
131 static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
134 return server->attr_bitmask;
136 return server->attr_bitmask_nl;
139 static inline struct nfs4_label *
140 nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
141 struct iattr *sattr, struct nfs4_label *l)
144 nfs4_label_release_security(struct nfs4_label *label)
147 nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
148 { return server->attr_bitmask; }
151 /* Prevent leaks of NFSv4 errors into userland */
152 static int nfs4_map_errors(int err)
157 case -NFS4ERR_RESOURCE:
158 case -NFS4ERR_LAYOUTTRYLATER:
159 case -NFS4ERR_RECALLCONFLICT:
161 case -NFS4ERR_WRONGSEC:
162 case -NFS4ERR_WRONG_CRED:
164 case -NFS4ERR_BADOWNER:
165 case -NFS4ERR_BADNAME:
167 case -NFS4ERR_SHARE_DENIED:
169 case -NFS4ERR_MINOR_VERS_MISMATCH:
170 return -EPROTONOSUPPORT;
171 case -NFS4ERR_FILE_OPEN:
174 dprintk("%s could not handle NFSv4 error %d\n",
182 * This is our standard bitmap for GETATTR requests.
184 const u32 nfs4_fattr_bitmap[3] = {
186 | FATTR4_WORD0_CHANGE
189 | FATTR4_WORD0_FILEID,
191 | FATTR4_WORD1_NUMLINKS
193 | FATTR4_WORD1_OWNER_GROUP
194 | FATTR4_WORD1_RAWDEV
195 | FATTR4_WORD1_SPACE_USED
196 | FATTR4_WORD1_TIME_ACCESS
197 | FATTR4_WORD1_TIME_METADATA
198 | FATTR4_WORD1_TIME_MODIFY
199 | FATTR4_WORD1_MOUNTED_ON_FILEID,
200 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
201 FATTR4_WORD2_SECURITY_LABEL
205 static const u32 nfs4_pnfs_open_bitmap[3] = {
207 | FATTR4_WORD0_CHANGE
210 | FATTR4_WORD0_FILEID,
212 | FATTR4_WORD1_NUMLINKS
214 | FATTR4_WORD1_OWNER_GROUP
215 | FATTR4_WORD1_RAWDEV
216 | FATTR4_WORD1_SPACE_USED
217 | FATTR4_WORD1_TIME_ACCESS
218 | FATTR4_WORD1_TIME_METADATA
219 | FATTR4_WORD1_TIME_MODIFY,
220 FATTR4_WORD2_MDSTHRESHOLD
221 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
222 | FATTR4_WORD2_SECURITY_LABEL
226 static const u32 nfs4_open_noattr_bitmap[3] = {
228 | FATTR4_WORD0_FILEID,
231 const u32 nfs4_statfs_bitmap[3] = {
232 FATTR4_WORD0_FILES_AVAIL
233 | FATTR4_WORD0_FILES_FREE
234 | FATTR4_WORD0_FILES_TOTAL,
235 FATTR4_WORD1_SPACE_AVAIL
236 | FATTR4_WORD1_SPACE_FREE
237 | FATTR4_WORD1_SPACE_TOTAL
240 const u32 nfs4_pathconf_bitmap[3] = {
242 | FATTR4_WORD0_MAXNAME,
246 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
247 | FATTR4_WORD0_MAXREAD
248 | FATTR4_WORD0_MAXWRITE
249 | FATTR4_WORD0_LEASE_TIME,
250 FATTR4_WORD1_TIME_DELTA
251 | FATTR4_WORD1_FS_LAYOUT_TYPES,
252 FATTR4_WORD2_LAYOUT_BLKSIZE
253 | FATTR4_WORD2_CLONE_BLKSIZE
256 const u32 nfs4_fs_locations_bitmap[3] = {
258 | FATTR4_WORD0_CHANGE
261 | FATTR4_WORD0_FILEID
262 | FATTR4_WORD0_FS_LOCATIONS,
264 | FATTR4_WORD1_NUMLINKS
266 | FATTR4_WORD1_OWNER_GROUP
267 | FATTR4_WORD1_RAWDEV
268 | FATTR4_WORD1_SPACE_USED
269 | FATTR4_WORD1_TIME_ACCESS
270 | FATTR4_WORD1_TIME_METADATA
271 | FATTR4_WORD1_TIME_MODIFY
272 | FATTR4_WORD1_MOUNTED_ON_FILEID,
275 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
276 struct nfs4_readdir_arg *readdir)
281 readdir->cookie = cookie;
282 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
287 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
292 * NFSv4 servers do not return entries for '.' and '..'
293 * Therefore, we fake these entries here. We let '.'
294 * have cookie 0 and '..' have cookie 1. Note that
295 * when talking to the server, we always send cookie 0
298 start = p = kmap_atomic(*readdir->pages);
301 *p++ = xdr_one; /* next */
302 *p++ = xdr_zero; /* cookie, first word */
303 *p++ = xdr_one; /* cookie, second word */
304 *p++ = xdr_one; /* entry len */
305 memcpy(p, ".\0\0\0", 4); /* entry */
307 *p++ = xdr_one; /* bitmap length */
308 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
309 *p++ = htonl(8); /* attribute buffer length */
310 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
313 *p++ = xdr_one; /* next */
314 *p++ = xdr_zero; /* cookie, first word */
315 *p++ = xdr_two; /* cookie, second word */
316 *p++ = xdr_two; /* entry len */
317 memcpy(p, "..\0\0", 4); /* entry */
319 *p++ = xdr_one; /* bitmap length */
320 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
321 *p++ = htonl(8); /* attribute buffer length */
322 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
324 readdir->pgbase = (char *)p - (char *)start;
325 readdir->count -= readdir->pgbase;
326 kunmap_atomic(start);
329 static void nfs4_test_and_free_stateid(struct nfs_server *server,
330 nfs4_stateid *stateid,
331 struct rpc_cred *cred)
333 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops;
335 ops->test_and_free_expired(server, stateid, cred);
338 static void __nfs4_free_revoked_stateid(struct nfs_server *server,
339 nfs4_stateid *stateid,
340 struct rpc_cred *cred)
342 stateid->type = NFS4_REVOKED_STATEID_TYPE;
343 nfs4_test_and_free_stateid(server, stateid, cred);
346 static void nfs4_free_revoked_stateid(struct nfs_server *server,
347 const nfs4_stateid *stateid,
348 struct rpc_cred *cred)
352 nfs4_stateid_copy(&tmp, stateid);
353 __nfs4_free_revoked_stateid(server, &tmp, cred);
356 static long nfs4_update_delay(long *timeout)
360 return NFS4_POLL_RETRY_MAX;
362 *timeout = NFS4_POLL_RETRY_MIN;
363 if (*timeout > NFS4_POLL_RETRY_MAX)
364 *timeout = NFS4_POLL_RETRY_MAX;
370 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
376 freezable_schedule_timeout_killable_unsafe(
377 nfs4_update_delay(timeout));
378 if (fatal_signal_pending(current))
383 /* This is the error handling routine for processes that are allowed
386 static int nfs4_do_handle_exception(struct nfs_server *server,
387 int errorcode, struct nfs4_exception *exception)
389 struct nfs_client *clp = server->nfs_client;
390 struct nfs4_state *state = exception->state;
391 const nfs4_stateid *stateid = exception->stateid;
392 struct inode *inode = exception->inode;
395 exception->delay = 0;
396 exception->recovering = 0;
397 exception->retry = 0;
399 if (stateid == NULL && state != NULL)
400 stateid = &state->stateid;
405 case -NFS4ERR_DELEG_REVOKED:
406 case -NFS4ERR_ADMIN_REVOKED:
407 case -NFS4ERR_EXPIRED:
408 case -NFS4ERR_BAD_STATEID:
409 if (inode != NULL && stateid != NULL) {
410 nfs_inode_find_state_and_recover(inode,
412 goto wait_on_recovery;
414 case -NFS4ERR_OPENMODE:
418 err = nfs_async_inode_return_delegation(inode,
421 goto wait_on_recovery;
422 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) {
423 exception->retry = 1;
429 ret = nfs4_schedule_stateid_recovery(server, state);
432 goto wait_on_recovery;
433 case -NFS4ERR_STALE_STATEID:
434 case -NFS4ERR_STALE_CLIENTID:
435 nfs4_schedule_lease_recovery(clp);
436 goto wait_on_recovery;
438 ret = nfs4_schedule_migration_recovery(server);
441 goto wait_on_recovery;
442 case -NFS4ERR_LEASE_MOVED:
443 nfs4_schedule_lease_moved_recovery(clp);
444 goto wait_on_recovery;
445 #if defined(CONFIG_NFS_V4_1)
446 case -NFS4ERR_BADSESSION:
447 case -NFS4ERR_BADSLOT:
448 case -NFS4ERR_BAD_HIGH_SLOT:
449 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
450 case -NFS4ERR_DEADSESSION:
451 case -NFS4ERR_SEQ_FALSE_RETRY:
452 case -NFS4ERR_SEQ_MISORDERED:
453 dprintk("%s ERROR: %d Reset session\n", __func__,
455 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
456 goto wait_on_recovery;
457 #endif /* defined(CONFIG_NFS_V4_1) */
458 case -NFS4ERR_FILE_OPEN:
459 if (exception->timeout > HZ) {
460 /* We have retried a decent amount, time to
467 nfs_inc_server_stats(server, NFSIOS_DELAY);
469 case -NFS4ERR_LAYOUTTRYLATER:
470 case -NFS4ERR_RECALLCONFLICT:
471 exception->delay = 1;
474 case -NFS4ERR_RETRY_UNCACHED_REP:
475 case -NFS4ERR_OLD_STATEID:
476 exception->retry = 1;
478 case -NFS4ERR_BADOWNER:
479 /* The following works around a Linux server bug! */
480 case -NFS4ERR_BADNAME:
481 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
482 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
483 exception->retry = 1;
484 printk(KERN_WARNING "NFS: v4 server %s "
485 "does not accept raw "
487 "Reenabling the idmapper.\n",
488 server->nfs_client->cl_hostname);
491 /* We failed to handle the error */
492 return nfs4_map_errors(ret);
494 exception->recovering = 1;
498 /* This is the error handling routine for processes that are allowed
501 int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
503 struct nfs_client *clp = server->nfs_client;
506 ret = nfs4_do_handle_exception(server, errorcode, exception);
507 if (exception->delay) {
508 ret = nfs4_delay(server->client, &exception->timeout);
511 if (exception->recovering) {
512 ret = nfs4_wait_clnt_recover(clp);
513 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
520 exception->retry = 1;
525 nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
526 int errorcode, struct nfs4_exception *exception)
528 struct nfs_client *clp = server->nfs_client;
531 ret = nfs4_do_handle_exception(server, errorcode, exception);
532 if (exception->delay) {
533 rpc_delay(task, nfs4_update_delay(&exception->timeout));
536 if (exception->recovering) {
537 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
538 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
539 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
542 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
547 exception->retry = 1;
552 nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
553 struct nfs4_state *state, long *timeout)
555 struct nfs4_exception exception = {
559 if (task->tk_status >= 0)
562 exception.timeout = *timeout;
563 task->tk_status = nfs4_async_handle_exception(task, server,
566 if (exception.delay && timeout)
567 *timeout = exception.timeout;
574 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
575 * or 'false' otherwise.
577 static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
579 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
580 return (flavor == RPC_AUTH_GSS_KRB5I) || (flavor == RPC_AUTH_GSS_KRB5P);
583 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
585 spin_lock(&clp->cl_lock);
586 if (time_before(clp->cl_last_renewal,timestamp))
587 clp->cl_last_renewal = timestamp;
588 spin_unlock(&clp->cl_lock);
591 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
593 struct nfs_client *clp = server->nfs_client;
595 if (!nfs4_has_session(clp))
596 do_renew_lease(clp, timestamp);
599 struct nfs4_call_sync_data {
600 const struct nfs_server *seq_server;
601 struct nfs4_sequence_args *seq_args;
602 struct nfs4_sequence_res *seq_res;
605 void nfs4_init_sequence(struct nfs4_sequence_args *args,
606 struct nfs4_sequence_res *res, int cache_reply)
608 args->sa_slot = NULL;
609 args->sa_cache_this = cache_reply;
610 args->sa_privileged = 0;
615 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
617 args->sa_privileged = 1;
620 static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res)
622 struct nfs4_slot *slot = res->sr_slot;
623 struct nfs4_slot_table *tbl;
626 spin_lock(&tbl->slot_tbl_lock);
627 if (!nfs41_wake_and_assign_slot(tbl, slot))
628 nfs4_free_slot(tbl, slot);
629 spin_unlock(&tbl->slot_tbl_lock);
634 static int nfs40_sequence_done(struct rpc_task *task,
635 struct nfs4_sequence_res *res)
637 if (res->sr_slot != NULL)
638 nfs40_sequence_free_slot(res);
642 #if defined(CONFIG_NFS_V4_1)
644 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
646 struct nfs4_session *session;
647 struct nfs4_slot_table *tbl;
648 struct nfs4_slot *slot = res->sr_slot;
649 bool send_new_highest_used_slotid = false;
652 session = tbl->session;
654 /* Bump the slot sequence number */
659 spin_lock(&tbl->slot_tbl_lock);
660 /* Be nice to the server: try to ensure that the last transmitted
661 * value for highest_user_slotid <= target_highest_slotid
663 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
664 send_new_highest_used_slotid = true;
666 if (nfs41_wake_and_assign_slot(tbl, slot)) {
667 send_new_highest_used_slotid = false;
670 nfs4_free_slot(tbl, slot);
672 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
673 send_new_highest_used_slotid = false;
675 spin_unlock(&tbl->slot_tbl_lock);
677 if (send_new_highest_used_slotid)
678 nfs41_notify_server(session->clp);
679 if (waitqueue_active(&tbl->slot_waitq))
680 wake_up_all(&tbl->slot_waitq);
683 static int nfs41_sequence_process(struct rpc_task *task,
684 struct nfs4_sequence_res *res)
686 struct nfs4_session *session;
687 struct nfs4_slot *slot = res->sr_slot;
688 struct nfs_client *clp;
689 bool interrupted = false;
694 /* don't increment the sequence number if the task wasn't sent */
695 if (!RPC_WAS_SENT(task))
698 session = slot->table->session;
700 if (slot->interrupted) {
701 slot->interrupted = 0;
705 trace_nfs4_sequence_done(session, res);
706 /* Check the SEQUENCE operation status */
707 switch (res->sr_status) {
709 /* If previous op on slot was interrupted and we reused
710 * the seq# and got a reply from the cache, then retry
712 if (task->tk_status == -EREMOTEIO && interrupted) {
716 /* Update the slot's sequence and clientid lease timer */
719 do_renew_lease(clp, res->sr_timestamp);
720 /* Check sequence flags */
721 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags,
723 nfs41_update_target_slotid(slot->table, slot, res);
727 * sr_status remains 1 if an RPC level error occurred.
728 * The server may or may not have processed the sequence
730 * Mark the slot as having hosted an interrupted RPC call.
732 slot->interrupted = 1;
735 /* The server detected a resend of the RPC call and
736 * returned NFS4ERR_DELAY as per Section 2.10.6.2
739 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
744 case -NFS4ERR_BADSLOT:
746 * The slot id we used was probably retired. Try again
747 * using a different slot id.
750 case -NFS4ERR_SEQ_MISORDERED:
752 * Was the last operation on this sequence interrupted?
753 * If so, retry after bumping the sequence number.
760 * Could this slot have been previously retired?
761 * If so, then the server may be expecting seq_nr = 1!
763 if (slot->seq_nr != 1) {
768 case -NFS4ERR_SEQ_FALSE_RETRY:
772 /* Just update the slot sequence no. */
776 /* The session may be reset by one of the error handlers. */
777 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
781 if (rpc_restart_call_prepare(task)) {
782 nfs41_sequence_free_slot(res);
788 if (!rpc_restart_call(task))
790 rpc_delay(task, NFS4_POLL_RETRY_MAX);
794 int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
796 if (!nfs41_sequence_process(task, res))
798 if (res->sr_slot != NULL)
799 nfs41_sequence_free_slot(res);
803 EXPORT_SYMBOL_GPL(nfs41_sequence_done);
805 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
807 if (res->sr_slot == NULL)
809 if (res->sr_slot->table->session != NULL)
810 return nfs41_sequence_process(task, res);
811 return nfs40_sequence_done(task, res);
814 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
816 if (res->sr_slot != NULL) {
817 if (res->sr_slot->table->session != NULL)
818 nfs41_sequence_free_slot(res);
820 nfs40_sequence_free_slot(res);
824 int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
826 if (res->sr_slot == NULL)
828 if (!res->sr_slot->table->session)
829 return nfs40_sequence_done(task, res);
830 return nfs41_sequence_done(task, res);
832 EXPORT_SYMBOL_GPL(nfs4_sequence_done);
834 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
836 struct nfs4_call_sync_data *data = calldata;
838 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
840 nfs4_setup_sequence(data->seq_server->nfs_client,
841 data->seq_args, data->seq_res, task);
844 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
846 struct nfs4_call_sync_data *data = calldata;
848 nfs41_sequence_done(task, data->seq_res);
851 static const struct rpc_call_ops nfs41_call_sync_ops = {
852 .rpc_call_prepare = nfs41_call_sync_prepare,
853 .rpc_call_done = nfs41_call_sync_done,
856 #else /* !CONFIG_NFS_V4_1 */
858 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
860 return nfs40_sequence_done(task, res);
863 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
865 if (res->sr_slot != NULL)
866 nfs40_sequence_free_slot(res);
869 int nfs4_sequence_done(struct rpc_task *task,
870 struct nfs4_sequence_res *res)
872 return nfs40_sequence_done(task, res);
874 EXPORT_SYMBOL_GPL(nfs4_sequence_done);
876 #endif /* !CONFIG_NFS_V4_1 */
878 int nfs4_setup_sequence(const struct nfs_client *client,
879 struct nfs4_sequence_args *args,
880 struct nfs4_sequence_res *res,
881 struct rpc_task *task)
883 struct nfs4_session *session = nfs4_get_session(client);
884 struct nfs4_slot_table *tbl = client->cl_slot_tbl;
885 struct nfs4_slot *slot;
887 /* slot already allocated? */
888 if (res->sr_slot != NULL)
892 tbl = &session->fc_slot_table;
893 task->tk_timeout = 0;
896 spin_lock(&tbl->slot_tbl_lock);
897 /* The state manager will wait until the slot table is empty */
898 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
901 slot = nfs4_alloc_slot(tbl);
903 /* Try again in 1/4 second */
904 if (slot == ERR_PTR(-ENOMEM))
905 task->tk_timeout = HZ >> 2;
908 spin_unlock(&tbl->slot_tbl_lock);
910 slot->privileged = args->sa_privileged ? 1 : 0;
911 args->sa_slot = slot;
915 res->sr_timestamp = jiffies;
916 res->sr_status_flags = 0;
920 trace_nfs4_setup_sequence(session, args);
922 rpc_call_start(task);
926 if (args->sa_privileged)
927 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
928 NULL, RPC_PRIORITY_PRIVILEGED);
930 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
931 spin_unlock(&tbl->slot_tbl_lock);
934 EXPORT_SYMBOL_GPL(nfs4_setup_sequence);
936 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
938 struct nfs4_call_sync_data *data = calldata;
939 nfs4_setup_sequence(data->seq_server->nfs_client,
940 data->seq_args, data->seq_res, task);
943 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
945 struct nfs4_call_sync_data *data = calldata;
946 nfs4_sequence_done(task, data->seq_res);
949 static const struct rpc_call_ops nfs40_call_sync_ops = {
950 .rpc_call_prepare = nfs40_call_sync_prepare,
951 .rpc_call_done = nfs40_call_sync_done,
954 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
955 struct nfs_server *server,
956 struct rpc_message *msg,
957 struct nfs4_sequence_args *args,
958 struct nfs4_sequence_res *res)
961 struct rpc_task *task;
962 struct nfs_client *clp = server->nfs_client;
963 struct nfs4_call_sync_data data = {
964 .seq_server = server,
968 struct rpc_task_setup task_setup = {
971 .callback_ops = clp->cl_mvops->call_sync_ops,
972 .callback_data = &data
975 task = rpc_run_task(&task_setup);
979 ret = task->tk_status;
985 int nfs4_call_sync(struct rpc_clnt *clnt,
986 struct nfs_server *server,
987 struct rpc_message *msg,
988 struct nfs4_sequence_args *args,
989 struct nfs4_sequence_res *res,
992 nfs4_init_sequence(args, res, cache_reply);
993 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
996 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo,
997 unsigned long timestamp)
999 struct nfs_inode *nfsi = NFS_I(dir);
1001 spin_lock(&dir->i_lock);
1002 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1003 if (cinfo->atomic && cinfo->before == dir->i_version) {
1004 nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE;
1005 nfsi->attrtimeo_timestamp = jiffies;
1007 nfs_force_lookup_revalidate(dir);
1008 if (cinfo->before != dir->i_version)
1009 nfsi->cache_validity |= NFS_INO_INVALID_ACCESS |
1010 NFS_INO_INVALID_ACL;
1012 dir->i_version = cinfo->after;
1013 nfsi->read_cache_jiffies = timestamp;
1014 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
1015 nfs_fscache_invalidate(dir);
1016 spin_unlock(&dir->i_lock);
1019 struct nfs4_opendata {
1021 struct nfs_openargs o_arg;
1022 struct nfs_openres o_res;
1023 struct nfs_open_confirmargs c_arg;
1024 struct nfs_open_confirmres c_res;
1025 struct nfs4_string owner_name;
1026 struct nfs4_string group_name;
1027 struct nfs4_label *a_label;
1028 struct nfs_fattr f_attr;
1029 struct nfs4_label *f_label;
1031 struct dentry *dentry;
1032 struct nfs4_state_owner *owner;
1033 struct nfs4_state *state;
1035 unsigned long timestamp;
1036 unsigned int rpc_done : 1;
1037 unsigned int file_created : 1;
1038 unsigned int is_recover : 1;
1043 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1044 int err, struct nfs4_exception *exception)
1048 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1050 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1051 exception->retry = 1;
1056 nfs4_map_atomic_open_share(struct nfs_server *server,
1057 fmode_t fmode, int openflags)
1061 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1063 res = NFS4_SHARE_ACCESS_READ;
1066 res = NFS4_SHARE_ACCESS_WRITE;
1068 case FMODE_READ|FMODE_WRITE:
1069 res = NFS4_SHARE_ACCESS_BOTH;
1071 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1073 /* Want no delegation if we're using O_DIRECT */
1074 if (openflags & O_DIRECT)
1075 res |= NFS4_SHARE_WANT_NO_DELEG;
1080 static enum open_claim_type4
1081 nfs4_map_atomic_open_claim(struct nfs_server *server,
1082 enum open_claim_type4 claim)
1084 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1089 case NFS4_OPEN_CLAIM_FH:
1090 return NFS4_OPEN_CLAIM_NULL;
1091 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1092 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1093 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1094 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1098 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1100 p->o_res.f_attr = &p->f_attr;
1101 p->o_res.f_label = p->f_label;
1102 p->o_res.seqid = p->o_arg.seqid;
1103 p->c_res.seqid = p->c_arg.seqid;
1104 p->o_res.server = p->o_arg.server;
1105 p->o_res.access_request = p->o_arg.access;
1106 nfs_fattr_init(&p->f_attr);
1107 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
1110 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
1111 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
1112 const struct iattr *attrs,
1113 struct nfs4_label *label,
1114 enum open_claim_type4 claim,
1117 struct dentry *parent = dget_parent(dentry);
1118 struct inode *dir = d_inode(parent);
1119 struct nfs_server *server = NFS_SERVER(dir);
1120 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1121 struct nfs4_opendata *p;
1123 p = kzalloc(sizeof(*p), gfp_mask);
1127 p->f_label = nfs4_label_alloc(server, gfp_mask);
1128 if (IS_ERR(p->f_label))
1131 p->a_label = nfs4_label_alloc(server, gfp_mask);
1132 if (IS_ERR(p->a_label))
1135 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1136 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
1137 if (IS_ERR(p->o_arg.seqid))
1138 goto err_free_label;
1139 nfs_sb_active(dentry->d_sb);
1140 p->dentry = dget(dentry);
1143 atomic_inc(&sp->so_count);
1144 p->o_arg.open_flags = flags;
1145 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
1146 p->o_arg.umask = current_umask();
1147 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1148 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1150 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1151 * will return permission denied for all bits until close */
1152 if (!(flags & O_EXCL)) {
1153 /* ask server to check for all possible rights as results
1155 switch (p->o_arg.claim) {
1158 case NFS4_OPEN_CLAIM_NULL:
1159 case NFS4_OPEN_CLAIM_FH:
1160 p->o_arg.access = NFS4_ACCESS_READ |
1161 NFS4_ACCESS_MODIFY |
1162 NFS4_ACCESS_EXTEND |
1163 NFS4_ACCESS_EXECUTE;
1166 p->o_arg.clientid = server->nfs_client->cl_clientid;
1167 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1168 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
1169 p->o_arg.name = &dentry->d_name;
1170 p->o_arg.server = server;
1171 p->o_arg.bitmask = nfs4_bitmask(server, label);
1172 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1173 p->o_arg.label = nfs4_label_copy(p->a_label, label);
1174 switch (p->o_arg.claim) {
1175 case NFS4_OPEN_CLAIM_NULL:
1176 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1177 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1178 p->o_arg.fh = NFS_FH(dir);
1180 case NFS4_OPEN_CLAIM_PREVIOUS:
1181 case NFS4_OPEN_CLAIM_FH:
1182 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1183 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1184 p->o_arg.fh = NFS_FH(d_inode(dentry));
1186 if (attrs != NULL && attrs->ia_valid != 0) {
1189 p->o_arg.u.attrs = &p->attrs;
1190 memcpy(&p->attrs, attrs, sizeof(p->attrs));
1193 verf[1] = current->pid;
1194 memcpy(p->o_arg.u.verifier.data, verf,
1195 sizeof(p->o_arg.u.verifier.data));
1197 p->c_arg.fh = &p->o_res.fh;
1198 p->c_arg.stateid = &p->o_res.stateid;
1199 p->c_arg.seqid = p->o_arg.seqid;
1200 nfs4_init_opendata_res(p);
1201 kref_init(&p->kref);
1205 nfs4_label_free(p->a_label);
1207 nfs4_label_free(p->f_label);
1215 static void nfs4_opendata_free(struct kref *kref)
1217 struct nfs4_opendata *p = container_of(kref,
1218 struct nfs4_opendata, kref);
1219 struct super_block *sb = p->dentry->d_sb;
1221 nfs_free_seqid(p->o_arg.seqid);
1222 nfs4_sequence_free_slot(&p->o_res.seq_res);
1223 if (p->state != NULL)
1224 nfs4_put_open_state(p->state);
1225 nfs4_put_state_owner(p->owner);
1227 nfs4_label_free(p->a_label);
1228 nfs4_label_free(p->f_label);
1232 nfs_sb_deactive(sb);
1233 nfs_fattr_free_names(&p->f_attr);
1234 kfree(p->f_attr.mdsthreshold);
1238 static void nfs4_opendata_put(struct nfs4_opendata *p)
1241 kref_put(&p->kref, nfs4_opendata_free);
1244 static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1247 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1248 case FMODE_READ|FMODE_WRITE:
1249 return state->n_rdwr != 0;
1251 return state->n_wronly != 0;
1253 return state->n_rdonly != 0;
1259 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
1263 if (open_mode & (O_EXCL|O_TRUNC))
1265 switch (mode & (FMODE_READ|FMODE_WRITE)) {
1267 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1268 && state->n_rdonly != 0;
1271 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1272 && state->n_wronly != 0;
1274 case FMODE_READ|FMODE_WRITE:
1275 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1276 && state->n_rdwr != 0;
1282 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1283 enum open_claim_type4 claim)
1285 if (delegation == NULL)
1287 if ((delegation->type & fmode) != fmode)
1289 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1292 case NFS4_OPEN_CLAIM_NULL:
1293 case NFS4_OPEN_CLAIM_FH:
1295 case NFS4_OPEN_CLAIM_PREVIOUS:
1296 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1301 nfs_mark_delegation_referenced(delegation);
1305 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
1314 case FMODE_READ|FMODE_WRITE:
1317 nfs4_state_set_mode_locked(state, state->state | fmode);
1320 #ifdef CONFIG_NFS_V4_1
1321 static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state)
1323 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags))
1325 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags))
1327 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags))
1331 #endif /* CONFIG_NFS_V4_1 */
1333 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1335 struct nfs_client *clp = state->owner->so_server->nfs_client;
1336 bool need_recover = false;
1338 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1339 need_recover = true;
1340 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1341 need_recover = true;
1342 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1343 need_recover = true;
1345 nfs4_state_mark_reclaim_nograce(clp, state);
1348 static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1349 const nfs4_stateid *stateid, nfs4_stateid *freeme)
1351 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1353 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1354 nfs4_stateid_copy(freeme, &state->open_stateid);
1355 nfs_test_and_clear_all_open_stateid(state);
1358 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1363 static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1365 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1367 if (state->n_wronly)
1368 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1369 if (state->n_rdonly)
1370 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1372 set_bit(NFS_O_RDWR_STATE, &state->flags);
1373 set_bit(NFS_OPEN_STATE, &state->flags);
1376 static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1377 nfs4_stateid *stateid, fmode_t fmode)
1379 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1380 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1382 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1385 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1388 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1389 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1390 clear_bit(NFS_OPEN_STATE, &state->flags);
1392 if (stateid == NULL)
1394 /* Handle OPEN+OPEN_DOWNGRADE races */
1395 if (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1396 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
1397 nfs_resync_open_stateid_locked(state);
1400 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1401 nfs4_stateid_copy(&state->stateid, stateid);
1402 nfs4_stateid_copy(&state->open_stateid, stateid);
1405 static void nfs_clear_open_stateid(struct nfs4_state *state,
1406 nfs4_stateid *arg_stateid,
1407 nfs4_stateid *stateid, fmode_t fmode)
1409 write_seqlock(&state->seqlock);
1410 /* Ignore, if the CLOSE argment doesn't match the current stateid */
1411 if (nfs4_state_match_open_stateid_other(state, arg_stateid))
1412 nfs_clear_open_stateid_locked(state, stateid, fmode);
1413 write_sequnlock(&state->seqlock);
1414 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1415 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1418 static void nfs_set_open_stateid_locked(struct nfs4_state *state,
1419 const nfs4_stateid *stateid, fmode_t fmode,
1420 nfs4_stateid *freeme)
1424 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1427 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1429 case FMODE_READ|FMODE_WRITE:
1430 set_bit(NFS_O_RDWR_STATE, &state->flags);
1432 if (!nfs_need_update_open_stateid(state, stateid, freeme))
1434 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1435 nfs4_stateid_copy(&state->stateid, stateid);
1436 nfs4_stateid_copy(&state->open_stateid, stateid);
1439 static void __update_open_stateid(struct nfs4_state *state,
1440 const nfs4_stateid *open_stateid,
1441 const nfs4_stateid *deleg_stateid,
1443 nfs4_stateid *freeme)
1446 * Protect the call to nfs4_state_set_mode_locked and
1447 * serialise the stateid update
1449 spin_lock(&state->owner->so_lock);
1450 write_seqlock(&state->seqlock);
1451 if (deleg_stateid != NULL) {
1452 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1453 set_bit(NFS_DELEGATED_STATE, &state->flags);
1455 if (open_stateid != NULL)
1456 nfs_set_open_stateid_locked(state, open_stateid, fmode, freeme);
1457 write_sequnlock(&state->seqlock);
1458 update_open_stateflags(state, fmode);
1459 spin_unlock(&state->owner->so_lock);
1462 static int update_open_stateid(struct nfs4_state *state,
1463 const nfs4_stateid *open_stateid,
1464 const nfs4_stateid *delegation,
1467 struct nfs_server *server = NFS_SERVER(state->inode);
1468 struct nfs_client *clp = server->nfs_client;
1469 struct nfs_inode *nfsi = NFS_I(state->inode);
1470 struct nfs_delegation *deleg_cur;
1471 nfs4_stateid freeme = { };
1474 fmode &= (FMODE_READ|FMODE_WRITE);
1477 deleg_cur = rcu_dereference(nfsi->delegation);
1478 if (deleg_cur == NULL)
1481 spin_lock(&deleg_cur->lock);
1482 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
1483 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
1484 (deleg_cur->type & fmode) != fmode)
1485 goto no_delegation_unlock;
1487 if (delegation == NULL)
1488 delegation = &deleg_cur->stateid;
1489 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1490 goto no_delegation_unlock;
1492 nfs_mark_delegation_referenced(deleg_cur);
1493 __update_open_stateid(state, open_stateid, &deleg_cur->stateid,
1496 no_delegation_unlock:
1497 spin_unlock(&deleg_cur->lock);
1501 if (!ret && open_stateid != NULL) {
1502 __update_open_stateid(state, open_stateid, NULL, fmode, &freeme);
1505 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1506 nfs4_schedule_state_manager(clp);
1507 if (freeme.type != 0)
1508 nfs4_test_and_free_stateid(server, &freeme,
1509 state->owner->so_cred);
1514 static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1515 const nfs4_stateid *stateid)
1517 struct nfs4_state *state = lsp->ls_state;
1520 spin_lock(&state->state_lock);
1521 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1523 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1525 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1528 spin_unlock(&state->state_lock);
1532 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1534 struct nfs_delegation *delegation;
1537 delegation = rcu_dereference(NFS_I(inode)->delegation);
1538 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1543 nfs4_inode_return_delegation(inode);
1546 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1548 struct nfs4_state *state = opendata->state;
1549 struct nfs_inode *nfsi = NFS_I(state->inode);
1550 struct nfs_delegation *delegation;
1551 int open_mode = opendata->o_arg.open_flags;
1552 fmode_t fmode = opendata->o_arg.fmode;
1553 enum open_claim_type4 claim = opendata->o_arg.claim;
1554 nfs4_stateid stateid;
1558 spin_lock(&state->owner->so_lock);
1559 if (can_open_cached(state, fmode, open_mode)) {
1560 update_open_stateflags(state, fmode);
1561 spin_unlock(&state->owner->so_lock);
1562 goto out_return_state;
1564 spin_unlock(&state->owner->so_lock);
1566 delegation = rcu_dereference(nfsi->delegation);
1567 if (!can_open_delegated(delegation, fmode, claim)) {
1571 /* Save the delegation */
1572 nfs4_stateid_copy(&stateid, &delegation->stateid);
1574 nfs_release_seqid(opendata->o_arg.seqid);
1575 if (!opendata->is_recover) {
1576 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1582 /* Try to update the stateid using the delegation */
1583 if (update_open_stateid(state, NULL, &stateid, fmode))
1584 goto out_return_state;
1587 return ERR_PTR(ret);
1589 atomic_inc(&state->count);
1594 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1596 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1597 struct nfs_delegation *delegation;
1598 int delegation_flags = 0;
1601 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1603 delegation_flags = delegation->flags;
1605 switch (data->o_arg.claim) {
1608 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1609 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1610 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1611 "returning a delegation for "
1612 "OPEN(CLAIM_DELEGATE_CUR)\n",
1616 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1617 nfs_inode_set_delegation(state->inode,
1618 data->owner->so_cred,
1621 nfs_inode_reclaim_delegation(state->inode,
1622 data->owner->so_cred,
1627 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1628 * and update the nfs4_state.
1630 static struct nfs4_state *
1631 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1633 struct inode *inode = data->state->inode;
1634 struct nfs4_state *state = data->state;
1637 if (!data->rpc_done) {
1638 if (data->rpc_status)
1639 return ERR_PTR(data->rpc_status);
1640 /* cached opens have already been processed */
1644 ret = nfs_refresh_inode(inode, &data->f_attr);
1646 return ERR_PTR(ret);
1648 if (data->o_res.delegation_type != 0)
1649 nfs4_opendata_check_deleg(data, state);
1651 update_open_stateid(state, &data->o_res.stateid, NULL,
1653 atomic_inc(&state->count);
1658 static struct nfs4_state *
1659 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1661 struct inode *inode;
1662 struct nfs4_state *state = NULL;
1665 if (!data->rpc_done) {
1666 state = nfs4_try_open_cached(data);
1667 trace_nfs4_cached_open(data->state);
1672 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1674 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1675 ret = PTR_ERR(inode);
1679 state = nfs4_get_open_state(inode, data->owner);
1682 if (data->o_res.delegation_type != 0)
1683 nfs4_opendata_check_deleg(data, state);
1684 update_open_stateid(state, &data->o_res.stateid, NULL,
1688 nfs_release_seqid(data->o_arg.seqid);
1693 return ERR_PTR(ret);
1696 static struct nfs4_state *
1697 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1699 struct nfs4_state *ret;
1701 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1702 ret =_nfs4_opendata_reclaim_to_nfs4_state(data);
1704 ret = _nfs4_opendata_to_nfs4_state(data);
1705 nfs4_sequence_free_slot(&data->o_res.seq_res);
1709 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1711 struct nfs_inode *nfsi = NFS_I(state->inode);
1712 struct nfs_open_context *ctx;
1714 spin_lock(&state->inode->i_lock);
1715 list_for_each_entry(ctx, &nfsi->open_files, list) {
1716 if (ctx->state != state)
1718 get_nfs_open_context(ctx);
1719 spin_unlock(&state->inode->i_lock);
1722 spin_unlock(&state->inode->i_lock);
1723 return ERR_PTR(-ENOENT);
1726 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1727 struct nfs4_state *state, enum open_claim_type4 claim)
1729 struct nfs4_opendata *opendata;
1731 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1732 NULL, NULL, claim, GFP_NOFS);
1733 if (opendata == NULL)
1734 return ERR_PTR(-ENOMEM);
1735 opendata->state = state;
1736 atomic_inc(&state->count);
1740 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1743 struct nfs4_state *newstate;
1746 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
1748 opendata->o_arg.open_flags = 0;
1749 opendata->o_arg.fmode = fmode;
1750 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1751 NFS_SB(opendata->dentry->d_sb),
1753 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1754 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1755 nfs4_init_opendata_res(opendata);
1756 ret = _nfs4_recover_proc_open(opendata);
1759 newstate = nfs4_opendata_to_nfs4_state(opendata);
1760 if (IS_ERR(newstate))
1761 return PTR_ERR(newstate);
1762 if (newstate != opendata->state)
1764 nfs4_close_state(newstate, fmode);
1768 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1772 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1773 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1774 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1775 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1776 /* memory barrier prior to reading state->n_* */
1777 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1778 clear_bit(NFS_OPEN_STATE, &state->flags);
1780 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1783 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1786 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1790 * We may have performed cached opens for all three recoveries.
1791 * Check if we need to update the current stateid.
1793 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1794 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1795 write_seqlock(&state->seqlock);
1796 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1797 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1798 write_sequnlock(&state->seqlock);
1805 * reclaim state on the server after a reboot.
1807 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1809 struct nfs_delegation *delegation;
1810 struct nfs4_opendata *opendata;
1811 fmode_t delegation_type = 0;
1814 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1815 NFS4_OPEN_CLAIM_PREVIOUS);
1816 if (IS_ERR(opendata))
1817 return PTR_ERR(opendata);
1819 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1820 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1821 delegation_type = delegation->type;
1823 opendata->o_arg.u.delegation_type = delegation_type;
1824 status = nfs4_open_recover(opendata, state);
1825 nfs4_opendata_put(opendata);
1829 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1831 struct nfs_server *server = NFS_SERVER(state->inode);
1832 struct nfs4_exception exception = { };
1835 err = _nfs4_do_open_reclaim(ctx, state);
1836 trace_nfs4_open_reclaim(ctx, 0, err);
1837 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1839 if (err != -NFS4ERR_DELAY)
1841 nfs4_handle_exception(server, err, &exception);
1842 } while (exception.retry);
1846 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1848 struct nfs_open_context *ctx;
1851 ctx = nfs4_state_find_open_context(state);
1854 ret = nfs4_do_open_reclaim(ctx, state);
1855 put_nfs_open_context(ctx);
1859 static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1863 printk(KERN_ERR "NFS: %s: unhandled error "
1864 "%d.\n", __func__, err);
1870 case -NFS4ERR_BADSESSION:
1871 case -NFS4ERR_BADSLOT:
1872 case -NFS4ERR_BAD_HIGH_SLOT:
1873 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1874 case -NFS4ERR_DEADSESSION:
1875 set_bit(NFS_DELEGATED_STATE, &state->flags);
1876 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1878 case -NFS4ERR_STALE_CLIENTID:
1879 case -NFS4ERR_STALE_STATEID:
1880 set_bit(NFS_DELEGATED_STATE, &state->flags);
1881 /* Don't recall a delegation if it was lost */
1882 nfs4_schedule_lease_recovery(server->nfs_client);
1884 case -NFS4ERR_MOVED:
1885 nfs4_schedule_migration_recovery(server);
1887 case -NFS4ERR_LEASE_MOVED:
1888 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1890 case -NFS4ERR_DELEG_REVOKED:
1891 case -NFS4ERR_ADMIN_REVOKED:
1892 case -NFS4ERR_EXPIRED:
1893 case -NFS4ERR_BAD_STATEID:
1894 case -NFS4ERR_OPENMODE:
1895 nfs_inode_find_state_and_recover(state->inode,
1897 nfs4_schedule_stateid_recovery(server, state);
1899 case -NFS4ERR_DELAY:
1900 case -NFS4ERR_GRACE:
1901 set_bit(NFS_DELEGATED_STATE, &state->flags);
1905 case -NFS4ERR_DENIED:
1906 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1912 int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
1913 struct nfs4_state *state, const nfs4_stateid *stateid,
1916 struct nfs_server *server = NFS_SERVER(state->inode);
1917 struct nfs4_opendata *opendata;
1920 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1921 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1922 if (IS_ERR(opendata))
1923 return PTR_ERR(opendata);
1924 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1925 write_seqlock(&state->seqlock);
1926 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1927 write_sequnlock(&state->seqlock);
1928 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1929 switch (type & (FMODE_READ|FMODE_WRITE)) {
1930 case FMODE_READ|FMODE_WRITE:
1932 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1935 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1939 err = nfs4_open_recover_helper(opendata, FMODE_READ);
1941 nfs4_opendata_put(opendata);
1942 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1945 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1947 struct nfs4_opendata *data = calldata;
1949 nfs4_setup_sequence(data->o_arg.server->nfs_client,
1950 &data->c_arg.seq_args, &data->c_res.seq_res, task);
1953 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1955 struct nfs4_opendata *data = calldata;
1957 nfs40_sequence_done(task, &data->c_res.seq_res);
1959 data->rpc_status = task->tk_status;
1960 if (data->rpc_status == 0) {
1961 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1962 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1963 renew_lease(data->o_res.server, data->timestamp);
1968 static void nfs4_open_confirm_release(void *calldata)
1970 struct nfs4_opendata *data = calldata;
1971 struct nfs4_state *state = NULL;
1973 /* If this request hasn't been cancelled, do nothing */
1974 if (data->cancelled == 0)
1976 /* In case of error, no cleanup! */
1977 if (!data->rpc_done)
1979 state = nfs4_opendata_to_nfs4_state(data);
1981 nfs4_close_state(state, data->o_arg.fmode);
1983 nfs4_opendata_put(data);
1986 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1987 .rpc_call_prepare = nfs4_open_confirm_prepare,
1988 .rpc_call_done = nfs4_open_confirm_done,
1989 .rpc_release = nfs4_open_confirm_release,
1993 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1995 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1997 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
1998 struct rpc_task *task;
1999 struct rpc_message msg = {
2000 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
2001 .rpc_argp = &data->c_arg,
2002 .rpc_resp = &data->c_res,
2003 .rpc_cred = data->owner->so_cred,
2005 struct rpc_task_setup task_setup_data = {
2006 .rpc_client = server->client,
2007 .rpc_message = &msg,
2008 .callback_ops = &nfs4_open_confirm_ops,
2009 .callback_data = data,
2010 .workqueue = nfsiod_workqueue,
2011 .flags = RPC_TASK_ASYNC,
2015 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
2016 kref_get(&data->kref);
2018 data->rpc_status = 0;
2019 data->timestamp = jiffies;
2020 if (data->is_recover)
2021 nfs4_set_sequence_privileged(&data->c_arg.seq_args);
2022 task = rpc_run_task(&task_setup_data);
2024 return PTR_ERR(task);
2025 status = rpc_wait_for_completion_task(task);
2027 data->cancelled = 1;
2030 status = data->rpc_status;
2035 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
2037 struct nfs4_opendata *data = calldata;
2038 struct nfs4_state_owner *sp = data->owner;
2039 struct nfs_client *clp = sp->so_server->nfs_client;
2040 enum open_claim_type4 claim = data->o_arg.claim;
2042 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
2045 * Check if we still need to send an OPEN call, or if we can use
2046 * a delegation instead.
2048 if (data->state != NULL) {
2049 struct nfs_delegation *delegation;
2051 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
2054 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2055 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
2056 goto unlock_no_action;
2059 /* Update client id. */
2060 data->o_arg.clientid = clp->cl_clientid;
2064 case NFS4_OPEN_CLAIM_PREVIOUS:
2065 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
2066 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2067 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
2068 case NFS4_OPEN_CLAIM_FH:
2069 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
2070 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
2072 data->timestamp = jiffies;
2073 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
2074 &data->o_arg.seq_args,
2075 &data->o_res.seq_res,
2077 nfs_release_seqid(data->o_arg.seqid);
2079 /* Set the create mode (note dependency on the session type) */
2080 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2081 if (data->o_arg.open_flags & O_EXCL) {
2082 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2083 if (nfs4_has_persistent_session(clp))
2084 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2085 else if (clp->cl_mvops->minor_version > 0)
2086 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2090 trace_nfs4_cached_open(data->state);
2093 task->tk_action = NULL;
2095 nfs4_sequence_done(task, &data->o_res.seq_res);
2098 static void nfs4_open_done(struct rpc_task *task, void *calldata)
2100 struct nfs4_opendata *data = calldata;
2102 data->rpc_status = task->tk_status;
2104 if (!nfs4_sequence_process(task, &data->o_res.seq_res))
2107 if (task->tk_status == 0) {
2108 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2109 switch (data->o_res.f_attr->mode & S_IFMT) {
2113 data->rpc_status = -ELOOP;
2116 data->rpc_status = -EISDIR;
2119 data->rpc_status = -ENOTDIR;
2122 renew_lease(data->o_res.server, data->timestamp);
2123 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2124 nfs_confirm_seqid(&data->owner->so_seqid, 0);
2129 static void nfs4_open_release(void *calldata)
2131 struct nfs4_opendata *data = calldata;
2132 struct nfs4_state *state = NULL;
2134 /* If this request hasn't been cancelled, do nothing */
2135 if (data->cancelled == 0)
2137 /* In case of error, no cleanup! */
2138 if (data->rpc_status != 0 || !data->rpc_done)
2140 /* In case we need an open_confirm, no cleanup! */
2141 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2143 state = nfs4_opendata_to_nfs4_state(data);
2145 nfs4_close_state(state, data->o_arg.fmode);
2147 nfs4_opendata_put(data);
2150 static const struct rpc_call_ops nfs4_open_ops = {
2151 .rpc_call_prepare = nfs4_open_prepare,
2152 .rpc_call_done = nfs4_open_done,
2153 .rpc_release = nfs4_open_release,
2156 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
2158 struct inode *dir = d_inode(data->dir);
2159 struct nfs_server *server = NFS_SERVER(dir);
2160 struct nfs_openargs *o_arg = &data->o_arg;
2161 struct nfs_openres *o_res = &data->o_res;
2162 struct rpc_task *task;
2163 struct rpc_message msg = {
2164 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2167 .rpc_cred = data->owner->so_cred,
2169 struct rpc_task_setup task_setup_data = {
2170 .rpc_client = server->client,
2171 .rpc_message = &msg,
2172 .callback_ops = &nfs4_open_ops,
2173 .callback_data = data,
2174 .workqueue = nfsiod_workqueue,
2175 .flags = RPC_TASK_ASYNC,
2179 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
2180 kref_get(&data->kref);
2182 data->rpc_status = 0;
2183 data->cancelled = 0;
2184 data->is_recover = 0;
2186 nfs4_set_sequence_privileged(&o_arg->seq_args);
2187 data->is_recover = 1;
2189 task = rpc_run_task(&task_setup_data);
2191 return PTR_ERR(task);
2192 status = rpc_wait_for_completion_task(task);
2194 data->cancelled = 1;
2197 status = data->rpc_status;
2203 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2205 struct inode *dir = d_inode(data->dir);
2206 struct nfs_openres *o_res = &data->o_res;
2209 status = nfs4_run_open_task(data, 1);
2210 if (status != 0 || !data->rpc_done)
2213 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2215 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM)
2216 status = _nfs4_proc_open_confirm(data);
2222 * Additional permission checks in order to distinguish between an
2223 * open for read, and an open for execute. This works around the
2224 * fact that NFSv4 OPEN treats read and execute permissions as being
2226 * Note that in the non-execute case, we want to turn off permission
2227 * checking if we just created a new file (POSIX open() semantics).
2229 static int nfs4_opendata_access(struct rpc_cred *cred,
2230 struct nfs4_opendata *opendata,
2231 struct nfs4_state *state, fmode_t fmode,
2234 struct nfs_access_entry cache;
2237 /* access call failed or for some reason the server doesn't
2238 * support any access modes -- defer access call until later */
2239 if (opendata->o_res.access_supported == 0)
2244 * Use openflags to check for exec, because fmode won't
2245 * always have FMODE_EXEC set when file open for exec.
2247 if (openflags & __FMODE_EXEC) {
2248 /* ONLY check for exec rights */
2250 } else if ((fmode & FMODE_READ) && !opendata->file_created)
2254 cache.jiffies = jiffies;
2255 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2256 nfs_access_add_cache(state->inode, &cache);
2258 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
2265 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2267 static int _nfs4_proc_open(struct nfs4_opendata *data)
2269 struct inode *dir = d_inode(data->dir);
2270 struct nfs_server *server = NFS_SERVER(dir);
2271 struct nfs_openargs *o_arg = &data->o_arg;
2272 struct nfs_openres *o_res = &data->o_res;
2275 status = nfs4_run_open_task(data, 0);
2276 if (!data->rpc_done)
2279 if (status == -NFS4ERR_BADNAME &&
2280 !(o_arg->open_flags & O_CREAT))
2285 nfs_fattr_map_and_free_names(server, &data->f_attr);
2287 if (o_arg->open_flags & O_CREAT) {
2288 if (o_arg->open_flags & O_EXCL)
2289 data->file_created = 1;
2290 else if (o_res->cinfo.before != o_res->cinfo.after)
2291 data->file_created = 1;
2292 if (data->file_created || dir->i_version != o_res->cinfo.after)
2293 update_changeattr(dir, &o_res->cinfo,
2294 o_res->f_attr->time_start);
2296 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2297 server->caps &= ~NFS_CAP_POSIX_LOCK;
2298 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2299 status = _nfs4_proc_open_confirm(data);
2303 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
2304 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
2310 * reclaim state on the server after a network partition.
2311 * Assumes caller holds the appropriate lock
2313 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2315 struct nfs4_opendata *opendata;
2318 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2319 NFS4_OPEN_CLAIM_FH);
2320 if (IS_ERR(opendata))
2321 return PTR_ERR(opendata);
2322 ret = nfs4_open_recover(opendata, state);
2324 d_drop(ctx->dentry);
2325 nfs4_opendata_put(opendata);
2329 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2331 struct nfs_server *server = NFS_SERVER(state->inode);
2332 struct nfs4_exception exception = { };
2336 err = _nfs4_open_expired(ctx, state);
2337 trace_nfs4_open_expired(ctx, 0, err);
2338 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2343 case -NFS4ERR_GRACE:
2344 case -NFS4ERR_DELAY:
2345 nfs4_handle_exception(server, err, &exception);
2348 } while (exception.retry);
2353 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2355 struct nfs_open_context *ctx;
2358 ctx = nfs4_state_find_open_context(state);
2361 ret = nfs4_do_open_expired(ctx, state);
2362 put_nfs_open_context(ctx);
2366 static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state,
2367 const nfs4_stateid *stateid)
2369 nfs_remove_bad_delegation(state->inode, stateid);
2370 write_seqlock(&state->seqlock);
2371 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2372 write_sequnlock(&state->seqlock);
2373 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2376 static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2378 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2379 nfs_finish_clear_delegation_stateid(state, NULL);
2382 static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2384 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2385 nfs40_clear_delegation_stateid(state);
2386 return nfs4_open_expired(sp, state);
2389 static int nfs40_test_and_free_expired_stateid(struct nfs_server *server,
2390 nfs4_stateid *stateid,
2391 struct rpc_cred *cred)
2393 return -NFS4ERR_BAD_STATEID;
2396 #if defined(CONFIG_NFS_V4_1)
2397 static int nfs41_test_and_free_expired_stateid(struct nfs_server *server,
2398 nfs4_stateid *stateid,
2399 struct rpc_cred *cred)
2403 switch (stateid->type) {
2406 case NFS4_INVALID_STATEID_TYPE:
2407 case NFS4_SPECIAL_STATEID_TYPE:
2408 return -NFS4ERR_BAD_STATEID;
2409 case NFS4_REVOKED_STATEID_TYPE:
2413 status = nfs41_test_stateid(server, stateid, cred);
2415 case -NFS4ERR_EXPIRED:
2416 case -NFS4ERR_ADMIN_REVOKED:
2417 case -NFS4ERR_DELEG_REVOKED:
2423 /* Ack the revoked state to the server */
2424 nfs41_free_stateid(server, stateid, cred, true);
2425 return -NFS4ERR_EXPIRED;
2428 static void nfs41_check_delegation_stateid(struct nfs4_state *state)
2430 struct nfs_server *server = NFS_SERVER(state->inode);
2431 nfs4_stateid stateid;
2432 struct nfs_delegation *delegation;
2433 struct rpc_cred *cred;
2436 /* Get the delegation credential for use by test/free_stateid */
2438 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2439 if (delegation == NULL) {
2444 nfs4_stateid_copy(&stateid, &delegation->stateid);
2445 if (test_bit(NFS_DELEGATION_REVOKED, &delegation->flags)) {
2447 nfs_finish_clear_delegation_stateid(state, &stateid);
2451 if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED, &delegation->flags)) {
2456 cred = get_rpccred(delegation->cred);
2458 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred);
2459 trace_nfs4_test_delegation_stateid(state, NULL, status);
2460 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID)
2461 nfs_finish_clear_delegation_stateid(state, &stateid);
2467 * nfs41_check_expired_locks - possibly free a lock stateid
2469 * @state: NFSv4 state for an inode
2471 * Returns NFS_OK if recovery for this stateid is now finished.
2472 * Otherwise a negative NFS4ERR value is returned.
2474 static int nfs41_check_expired_locks(struct nfs4_state *state)
2476 int status, ret = NFS_OK;
2477 struct nfs4_lock_state *lsp, *prev = NULL;
2478 struct nfs_server *server = NFS_SERVER(state->inode);
2480 if (!test_bit(LK_STATE_IN_USE, &state->flags))
2483 spin_lock(&state->state_lock);
2484 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
2485 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
2486 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
2488 atomic_inc(&lsp->ls_count);
2489 spin_unlock(&state->state_lock);
2491 nfs4_put_lock_state(prev);
2494 status = nfs41_test_and_free_expired_stateid(server,
2497 trace_nfs4_test_lock_stateid(state, lsp, status);
2498 if (status == -NFS4ERR_EXPIRED ||
2499 status == -NFS4ERR_BAD_STATEID) {
2500 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
2501 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE;
2502 if (!recover_lost_locks)
2503 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2504 } else if (status != NFS_OK) {
2506 nfs4_put_lock_state(prev);
2509 spin_lock(&state->state_lock);
2512 spin_unlock(&state->state_lock);
2513 nfs4_put_lock_state(prev);
2519 * nfs41_check_open_stateid - possibly free an open stateid
2521 * @state: NFSv4 state for an inode
2523 * Returns NFS_OK if recovery for this stateid is now finished.
2524 * Otherwise a negative NFS4ERR value is returned.
2526 static int nfs41_check_open_stateid(struct nfs4_state *state)
2528 struct nfs_server *server = NFS_SERVER(state->inode);
2529 nfs4_stateid *stateid = &state->open_stateid;
2530 struct rpc_cred *cred = state->owner->so_cred;
2533 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) {
2534 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) {
2535 if (nfs4_have_delegation(state->inode, state->state))
2537 return -NFS4ERR_OPENMODE;
2539 return -NFS4ERR_BAD_STATEID;
2541 status = nfs41_test_and_free_expired_stateid(server, stateid, cred);
2542 trace_nfs4_test_open_stateid(state, NULL, status);
2543 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) {
2544 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2545 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2546 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2547 clear_bit(NFS_OPEN_STATE, &state->flags);
2548 stateid->type = NFS4_INVALID_STATEID_TYPE;
2550 if (status != NFS_OK)
2552 if (nfs_open_stateid_recover_openmode(state))
2553 return -NFS4ERR_OPENMODE;
2557 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2561 nfs41_check_delegation_stateid(state);
2562 status = nfs41_check_expired_locks(state);
2563 if (status != NFS_OK)
2565 status = nfs41_check_open_stateid(state);
2566 if (status != NFS_OK)
2567 status = nfs4_open_expired(sp, state);
2573 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2574 * fields corresponding to attributes that were used to store the verifier.
2575 * Make sure we clobber those fields in the later setattr call
2577 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2578 struct iattr *sattr, struct nfs4_label **label)
2580 const u32 *attrset = opendata->o_res.attrset;
2582 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2583 !(sattr->ia_valid & ATTR_ATIME_SET))
2584 sattr->ia_valid |= ATTR_ATIME;
2586 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2587 !(sattr->ia_valid & ATTR_MTIME_SET))
2588 sattr->ia_valid |= ATTR_MTIME;
2590 /* Except MODE, it seems harmless of setting twice. */
2591 if (opendata->o_arg.createmode != NFS4_CREATE_EXCLUSIVE &&
2592 attrset[1] & FATTR4_WORD1_MODE)
2593 sattr->ia_valid &= ~ATTR_MODE;
2595 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2599 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2602 struct nfs_open_context *ctx)
2604 struct nfs4_state_owner *sp = opendata->owner;
2605 struct nfs_server *server = sp->so_server;
2606 struct dentry *dentry;
2607 struct nfs4_state *state;
2611 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2613 ret = _nfs4_proc_open(opendata);
2617 state = nfs4_opendata_to_nfs4_state(opendata);
2618 ret = PTR_ERR(state);
2622 if (server->caps & NFS_CAP_POSIX_LOCK)
2623 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2624 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK)
2625 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags);
2627 dentry = opendata->dentry;
2628 if (d_really_is_negative(dentry)) {
2629 struct dentry *alias;
2631 alias = d_exact_alias(dentry, state->inode);
2633 alias = d_splice_alias(igrab(state->inode), dentry);
2634 /* d_splice_alias() can't fail here - it's a non-directory */
2637 ctx->dentry = dentry = alias;
2639 nfs_set_verifier(dentry,
2640 nfs_save_change_attribute(d_inode(opendata->dir)));
2643 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2647 if (d_inode(dentry) == state->inode) {
2648 nfs_inode_attach_open_context(ctx);
2649 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2650 nfs4_schedule_stateid_recovery(server, state);
2657 * Returns a referenced nfs4_state
2659 static int _nfs4_do_open(struct inode *dir,
2660 struct nfs_open_context *ctx,
2662 struct iattr *sattr,
2663 struct nfs4_label *label,
2666 struct nfs4_state_owner *sp;
2667 struct nfs4_state *state = NULL;
2668 struct nfs_server *server = NFS_SERVER(dir);
2669 struct nfs4_opendata *opendata;
2670 struct dentry *dentry = ctx->dentry;
2671 struct rpc_cred *cred = ctx->cred;
2672 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2673 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
2674 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
2675 struct nfs4_label *olabel = NULL;
2678 /* Protect against reboot recovery conflicts */
2680 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2682 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2685 status = nfs4_client_recover_expired_lease(server->nfs_client);
2687 goto err_put_state_owner;
2688 if (d_really_is_positive(dentry))
2689 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
2691 if (d_really_is_positive(dentry))
2692 claim = NFS4_OPEN_CLAIM_FH;
2693 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
2694 label, claim, GFP_KERNEL);
2695 if (opendata == NULL)
2696 goto err_put_state_owner;
2699 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2700 if (IS_ERR(olabel)) {
2701 status = PTR_ERR(olabel);
2702 goto err_opendata_put;
2706 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2707 if (!opendata->f_attr.mdsthreshold) {
2708 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2709 if (!opendata->f_attr.mdsthreshold)
2710 goto err_free_label;
2712 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
2714 if (d_really_is_positive(dentry))
2715 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
2717 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
2719 goto err_free_label;
2722 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
2723 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
2724 nfs4_exclusive_attrset(opendata, sattr, &label);
2726 * send create attributes which was not set by open
2727 * with an extra setattr.
2729 if (sattr->ia_valid & NFS4_VALID_ATTRS) {
2730 nfs_fattr_init(opendata->o_res.f_attr);
2731 status = nfs4_do_setattr(state->inode, cred,
2732 opendata->o_res.f_attr, sattr,
2733 ctx, label, olabel);
2735 nfs_setattr_update_inode(state->inode, sattr,
2736 opendata->o_res.f_attr);
2737 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2741 if (opened && opendata->file_created)
2742 *opened |= FILE_CREATED;
2744 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
2745 *ctx_th = opendata->f_attr.mdsthreshold;
2746 opendata->f_attr.mdsthreshold = NULL;
2749 nfs4_label_free(olabel);
2751 nfs4_opendata_put(opendata);
2752 nfs4_put_state_owner(sp);
2755 nfs4_label_free(olabel);
2757 nfs4_opendata_put(opendata);
2758 err_put_state_owner:
2759 nfs4_put_state_owner(sp);
2765 static struct nfs4_state *nfs4_do_open(struct inode *dir,
2766 struct nfs_open_context *ctx,
2768 struct iattr *sattr,
2769 struct nfs4_label *label,
2772 struct nfs_server *server = NFS_SERVER(dir);
2773 struct nfs4_exception exception = { };
2774 struct nfs4_state *res;
2778 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
2780 trace_nfs4_open_file(ctx, flags, status);
2783 /* NOTE: BAD_SEQID means the server and client disagree about the
2784 * book-keeping w.r.t. state-changing operations
2785 * (OPEN/CLOSE/LOCK/LOCKU...)
2786 * It is actually a sign of a bug on the client or on the server.
2788 * If we receive a BAD_SEQID error in the particular case of
2789 * doing an OPEN, we assume that nfs_increment_open_seqid() will
2790 * have unhashed the old state_owner for us, and that we can
2791 * therefore safely retry using a new one. We should still warn
2792 * the user though...
2794 if (status == -NFS4ERR_BAD_SEQID) {
2795 pr_warn_ratelimited("NFS: v4 server %s "
2796 " returned a bad sequence-id error!\n",
2797 NFS_SERVER(dir)->nfs_client->cl_hostname);
2798 exception.retry = 1;
2802 * BAD_STATEID on OPEN means that the server cancelled our
2803 * state before it received the OPEN_CONFIRM.
2804 * Recover by retrying the request as per the discussion
2805 * on Page 181 of RFC3530.
2807 if (status == -NFS4ERR_BAD_STATEID) {
2808 exception.retry = 1;
2811 if (status == -EAGAIN) {
2812 /* We must have found a delegation */
2813 exception.retry = 1;
2816 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2818 res = ERR_PTR(nfs4_handle_exception(server,
2819 status, &exception));
2820 } while (exception.retry);
2824 static int _nfs4_do_setattr(struct inode *inode,
2825 struct nfs_setattrargs *arg,
2826 struct nfs_setattrres *res,
2827 struct rpc_cred *cred,
2828 struct nfs_open_context *ctx)
2830 struct nfs_server *server = NFS_SERVER(inode);
2831 struct rpc_message msg = {
2832 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2837 struct rpc_cred *delegation_cred = NULL;
2838 unsigned long timestamp = jiffies;
2843 nfs_fattr_init(res->fattr);
2845 /* Servers should only apply open mode checks for file size changes */
2846 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false;
2847 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2849 if (nfs4_copy_delegation_stateid(inode, fmode, &arg->stateid, &delegation_cred)) {
2850 /* Use that stateid */
2851 } else if (truncate && ctx != NULL) {
2852 struct nfs_lock_context *l_ctx;
2853 if (!nfs4_valid_open_stateid(ctx->state))
2855 l_ctx = nfs_get_lock_context(ctx);
2857 return PTR_ERR(l_ctx);
2858 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx,
2859 &arg->stateid, &delegation_cred);
2860 nfs_put_lock_context(l_ctx);
2864 nfs4_stateid_copy(&arg->stateid, &zero_stateid);
2865 if (delegation_cred)
2866 msg.rpc_cred = delegation_cred;
2868 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1);
2870 put_rpccred(delegation_cred);
2871 if (status == 0 && ctx != NULL)
2872 renew_lease(server, timestamp);
2873 trace_nfs4_setattr(inode, &arg->stateid, status);
2877 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2878 struct nfs_fattr *fattr, struct iattr *sattr,
2879 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
2880 struct nfs4_label *olabel)
2882 struct nfs_server *server = NFS_SERVER(inode);
2883 struct nfs4_state *state = ctx ? ctx->state : NULL;
2884 struct nfs_setattrargs arg = {
2885 .fh = NFS_FH(inode),
2888 .bitmask = server->attr_bitmask,
2891 struct nfs_setattrres res = {
2896 struct nfs4_exception exception = {
2899 .stateid = &arg.stateid,
2903 arg.bitmask = nfs4_bitmask(server, ilabel);
2905 arg.bitmask = nfs4_bitmask(server, olabel);
2908 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx);
2910 case -NFS4ERR_OPENMODE:
2911 if (!(sattr->ia_valid & ATTR_SIZE)) {
2912 pr_warn_once("NFSv4: server %s is incorrectly "
2913 "applying open mode checks to "
2914 "a SETATTR that is not "
2915 "changing file size.\n",
2916 server->nfs_client->cl_hostname);
2918 if (state && !(state->state & FMODE_WRITE)) {
2920 if (sattr->ia_valid & ATTR_OPEN)
2925 err = nfs4_handle_exception(server, err, &exception);
2926 } while (exception.retry);
2932 nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
2934 if (inode == NULL || !nfs_have_layout(inode))
2937 return pnfs_wait_on_layoutreturn(inode, task);
2940 struct nfs4_closedata {
2941 struct inode *inode;
2942 struct nfs4_state *state;
2943 struct nfs_closeargs arg;
2944 struct nfs_closeres res;
2946 struct nfs4_layoutreturn_args arg;
2947 struct nfs4_layoutreturn_res res;
2948 struct nfs4_xdr_opaque_data ld_private;
2952 struct nfs_fattr fattr;
2953 unsigned long timestamp;
2956 static void nfs4_free_closedata(void *data)
2958 struct nfs4_closedata *calldata = data;
2959 struct nfs4_state_owner *sp = calldata->state->owner;
2960 struct super_block *sb = calldata->state->inode->i_sb;
2962 if (calldata->lr.roc)
2963 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res,
2964 calldata->res.lr_ret);
2965 nfs4_put_open_state(calldata->state);
2966 nfs_free_seqid(calldata->arg.seqid);
2967 nfs4_put_state_owner(sp);
2968 nfs_sb_deactive(sb);
2972 static void nfs4_close_done(struct rpc_task *task, void *data)
2974 struct nfs4_closedata *calldata = data;
2975 struct nfs4_state *state = calldata->state;
2976 struct nfs_server *server = NFS_SERVER(calldata->inode);
2977 nfs4_stateid *res_stateid = NULL;
2979 dprintk("%s: begin!\n", __func__);
2980 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2982 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
2984 /* Handle Layoutreturn errors */
2985 if (calldata->arg.lr_args && task->tk_status != 0) {
2986 switch (calldata->res.lr_ret) {
2988 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
2991 calldata->arg.lr_args = NULL;
2992 calldata->res.lr_res = NULL;
2994 case -NFS4ERR_ADMIN_REVOKED:
2995 case -NFS4ERR_DELEG_REVOKED:
2996 case -NFS4ERR_EXPIRED:
2997 case -NFS4ERR_BAD_STATEID:
2998 case -NFS4ERR_OLD_STATEID:
2999 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
3000 case -NFS4ERR_WRONG_CRED:
3001 calldata->arg.lr_args = NULL;
3002 calldata->res.lr_res = NULL;
3003 calldata->res.lr_ret = 0;
3004 rpc_restart_call_prepare(task);
3009 /* hmm. we are done with the inode, and in the process of freeing
3010 * the state_owner. we keep this around to process errors
3012 switch (task->tk_status) {
3014 res_stateid = &calldata->res.stateid;
3015 renew_lease(server, calldata->timestamp);
3017 case -NFS4ERR_ACCESS:
3018 if (calldata->arg.bitmask != NULL) {
3019 calldata->arg.bitmask = NULL;
3020 calldata->res.fattr = NULL;
3021 task->tk_status = 0;
3022 rpc_restart_call_prepare(task);
3027 case -NFS4ERR_ADMIN_REVOKED:
3028 case -NFS4ERR_STALE_STATEID:
3029 case -NFS4ERR_EXPIRED:
3030 nfs4_free_revoked_stateid(server,
3031 &calldata->arg.stateid,
3032 task->tk_msg.rpc_cred);
3033 case -NFS4ERR_OLD_STATEID:
3034 case -NFS4ERR_BAD_STATEID:
3035 if (!nfs4_stateid_match(&calldata->arg.stateid,
3036 &state->open_stateid)) {
3037 rpc_restart_call_prepare(task);
3040 if (calldata->arg.fmode == 0)
3043 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
3044 rpc_restart_call_prepare(task);
3048 nfs_clear_open_stateid(state, &calldata->arg.stateid,
3049 res_stateid, calldata->arg.fmode);
3051 nfs_release_seqid(calldata->arg.seqid);
3052 nfs_refresh_inode(calldata->inode, &calldata->fattr);
3053 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
3056 static void nfs4_close_prepare(struct rpc_task *task, void *data)
3058 struct nfs4_closedata *calldata = data;
3059 struct nfs4_state *state = calldata->state;
3060 struct inode *inode = calldata->inode;
3061 bool is_rdonly, is_wronly, is_rdwr;
3064 dprintk("%s: begin!\n", __func__);
3065 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3068 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
3069 spin_lock(&state->owner->so_lock);
3070 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
3071 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
3072 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
3073 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
3074 /* Calculate the change in open mode */
3075 calldata->arg.fmode = 0;
3076 if (state->n_rdwr == 0) {
3077 if (state->n_rdonly == 0)
3078 call_close |= is_rdonly;
3080 calldata->arg.fmode |= FMODE_READ;
3081 if (state->n_wronly == 0)
3082 call_close |= is_wronly;
3084 calldata->arg.fmode |= FMODE_WRITE;
3085 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
3086 call_close |= is_rdwr;
3088 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
3090 if (!nfs4_valid_open_stateid(state) ||
3091 test_bit(NFS_OPEN_STATE, &state->flags) == 0)
3093 spin_unlock(&state->owner->so_lock);
3096 /* Note: exit _without_ calling nfs4_close_done */
3100 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) {
3101 nfs_release_seqid(calldata->arg.seqid);
3105 if (calldata->arg.fmode == 0)
3106 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3108 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) {
3109 /* Close-to-open cache consistency revalidation */
3110 if (!nfs4_have_delegation(inode, FMODE_READ))
3111 calldata->arg.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask;
3113 calldata->arg.bitmask = NULL;
3116 calldata->arg.share_access =
3117 nfs4_map_atomic_open_share(NFS_SERVER(inode),
3118 calldata->arg.fmode, 0);
3120 if (calldata->res.fattr == NULL)
3121 calldata->arg.bitmask = NULL;
3122 else if (calldata->arg.bitmask == NULL)
3123 calldata->res.fattr = NULL;
3124 calldata->timestamp = jiffies;
3125 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client,
3126 &calldata->arg.seq_args,
3127 &calldata->res.seq_res,
3129 nfs_release_seqid(calldata->arg.seqid);
3130 dprintk("%s: done!\n", __func__);
3133 task->tk_action = NULL;
3135 nfs4_sequence_done(task, &calldata->res.seq_res);
3138 static const struct rpc_call_ops nfs4_close_ops = {
3139 .rpc_call_prepare = nfs4_close_prepare,
3140 .rpc_call_done = nfs4_close_done,
3141 .rpc_release = nfs4_free_closedata,
3145 * It is possible for data to be read/written from a mem-mapped file
3146 * after the sys_close call (which hits the vfs layer as a flush).
3147 * This means that we can't safely call nfsv4 close on a file until
3148 * the inode is cleared. This in turn means that we are not good
3149 * NFSv4 citizens - we do not indicate to the server to update the file's
3150 * share state even when we are done with one of the three share
3151 * stateid's in the inode.
3153 * NOTE: Caller must be holding the sp->so_owner semaphore!
3155 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
3157 struct nfs_server *server = NFS_SERVER(state->inode);
3158 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
3159 struct nfs4_closedata *calldata;
3160 struct nfs4_state_owner *sp = state->owner;
3161 struct rpc_task *task;
3162 struct rpc_message msg = {
3163 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
3164 .rpc_cred = state->owner->so_cred,
3166 struct rpc_task_setup task_setup_data = {
3167 .rpc_client = server->client,
3168 .rpc_message = &msg,
3169 .callback_ops = &nfs4_close_ops,
3170 .workqueue = nfsiod_workqueue,
3171 .flags = RPC_TASK_ASYNC,
3173 int status = -ENOMEM;
3175 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
3176 &task_setup_data.rpc_client, &msg);
3178 calldata = kzalloc(sizeof(*calldata), gfp_mask);
3179 if (calldata == NULL)
3181 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
3182 calldata->inode = state->inode;
3183 calldata->state = state;
3184 calldata->arg.fh = NFS_FH(state->inode);
3185 /* Serialization for the sequence id */
3186 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
3187 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
3188 if (IS_ERR(calldata->arg.seqid))
3189 goto out_free_calldata;
3190 nfs_fattr_init(&calldata->fattr);
3191 calldata->arg.fmode = 0;
3192 calldata->lr.arg.ld_private = &calldata->lr.ld_private;
3193 calldata->res.fattr = &calldata->fattr;
3194 calldata->res.seqid = calldata->arg.seqid;
3195 calldata->res.server = server;
3196 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
3197 calldata->lr.roc = pnfs_roc(state->inode,
3198 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred);
3199 if (calldata->lr.roc) {
3200 calldata->arg.lr_args = &calldata->lr.arg;
3201 calldata->res.lr_res = &calldata->lr.res;
3203 nfs_sb_active(calldata->inode->i_sb);
3205 msg.rpc_argp = &calldata->arg;
3206 msg.rpc_resp = &calldata->res;
3207 task_setup_data.callback_data = calldata;
3208 task = rpc_run_task(&task_setup_data);
3210 return PTR_ERR(task);
3213 status = rpc_wait_for_completion_task(task);
3219 nfs4_put_open_state(state);
3220 nfs4_put_state_owner(sp);
3224 static struct inode *
3225 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3226 int open_flags, struct iattr *attr, int *opened)
3228 struct nfs4_state *state;
3229 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
3231 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
3233 /* Protect against concurrent sillydeletes */
3234 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
3236 nfs4_label_release_security(label);
3239 return ERR_CAST(state);
3240 return state->inode;
3243 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
3245 if (ctx->state == NULL)
3248 nfs4_close_sync(ctx->state, ctx->mode);
3250 nfs4_close_state(ctx->state, ctx->mode);
3253 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3254 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
3255 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_MODE_UMASK - 1UL)
3257 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3259 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
3260 struct nfs4_server_caps_arg args = {
3264 struct nfs4_server_caps_res res = {};
3265 struct rpc_message msg = {
3266 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
3272 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3273 FATTR4_WORD0_FH_EXPIRE_TYPE |
3274 FATTR4_WORD0_LINK_SUPPORT |
3275 FATTR4_WORD0_SYMLINK_SUPPORT |
3276 FATTR4_WORD0_ACLSUPPORT;
3278 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3280 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3282 /* Sanity check the server answers */
3283 switch (minorversion) {
3285 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3286 res.attr_bitmask[2] = 0;
3289 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3292 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3294 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
3295 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3296 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3297 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3298 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
3299 NFS_CAP_CTIME|NFS_CAP_MTIME|
3300 NFS_CAP_SECURITY_LABEL);
3301 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3302 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3303 server->caps |= NFS_CAP_ACLS;
3304 if (res.has_links != 0)
3305 server->caps |= NFS_CAP_HARDLINKS;
3306 if (res.has_symlinks != 0)
3307 server->caps |= NFS_CAP_SYMLINKS;
3308 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3309 server->caps |= NFS_CAP_FILEID;
3310 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3311 server->caps |= NFS_CAP_MODE;
3312 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3313 server->caps |= NFS_CAP_NLINK;
3314 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3315 server->caps |= NFS_CAP_OWNER;
3316 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3317 server->caps |= NFS_CAP_OWNER_GROUP;
3318 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3319 server->caps |= NFS_CAP_ATIME;
3320 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3321 server->caps |= NFS_CAP_CTIME;
3322 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3323 server->caps |= NFS_CAP_MTIME;
3324 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
3325 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3326 server->caps |= NFS_CAP_SECURITY_LABEL;
3328 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3329 sizeof(server->attr_bitmask));
3330 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
3332 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3333 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3334 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
3335 server->cache_consistency_bitmask[2] = 0;
3336 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3337 sizeof(server->exclcreat_bitmask));
3338 server->acl_bitmask = res.acl_bitmask;
3339 server->fh_expire_type = res.fh_expire_type;
3345 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3347 struct nfs4_exception exception = { };
3350 err = nfs4_handle_exception(server,
3351 _nfs4_server_capabilities(server, fhandle),
3353 } while (exception.retry);
3357 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3358 struct nfs_fsinfo *info)
3361 struct nfs4_lookup_root_arg args = {
3364 struct nfs4_lookup_res res = {
3366 .fattr = info->fattr,
3369 struct rpc_message msg = {
3370 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3375 bitmask[0] = nfs4_fattr_bitmap[0];
3376 bitmask[1] = nfs4_fattr_bitmap[1];
3378 * Process the label in the upcoming getfattr
3380 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3382 nfs_fattr_init(info->fattr);
3383 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3386 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3387 struct nfs_fsinfo *info)
3389 struct nfs4_exception exception = { };
3392 err = _nfs4_lookup_root(server, fhandle, info);
3393 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
3396 case -NFS4ERR_WRONGSEC:
3399 err = nfs4_handle_exception(server, err, &exception);
3401 } while (exception.retry);
3406 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3407 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3409 struct rpc_auth_create_args auth_args = {
3410 .pseudoflavor = flavor,
3412 struct rpc_auth *auth;
3414 auth = rpcauth_create(&auth_args, server->client);
3417 return nfs4_lookup_root(server, fhandle, info);
3421 * Retry pseudoroot lookup with various security flavors. We do this when:
3423 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3424 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3426 * Returns zero on success, or a negative NFS4ERR value, or a
3427 * negative errno value.
3429 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3430 struct nfs_fsinfo *info)
3432 /* Per 3530bis 15.33.5 */
3433 static const rpc_authflavor_t flav_array[] = {
3437 RPC_AUTH_UNIX, /* courtesy */
3440 int status = -EPERM;
3443 if (server->auth_info.flavor_len > 0) {
3444 /* try each flavor specified by user */
3445 for (i = 0; i < server->auth_info.flavor_len; i++) {
3446 status = nfs4_lookup_root_sec(server, fhandle, info,
3447 server->auth_info.flavors[i]);
3448 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3453 /* no flavors specified by user, try default list */
3454 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3455 status = nfs4_lookup_root_sec(server, fhandle, info,
3457 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3464 * -EACCESS could mean that the user doesn't have correct permissions
3465 * to access the mount. It could also mean that we tried to mount
3466 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3467 * existing mount programs don't handle -EACCES very well so it should
3468 * be mapped to -EPERM instead.
3470 if (status == -EACCES)
3476 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3477 * @server: initialized nfs_server handle
3478 * @fhandle: we fill in the pseudo-fs root file handle
3479 * @info: we fill in an FSINFO struct
3480 * @auth_probe: probe the auth flavours
3482 * Returns zero on success, or a negative errno.
3484 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
3485 struct nfs_fsinfo *info,
3491 status = nfs4_lookup_root(server, fhandle, info);
3493 if (auth_probe || status == NFS4ERR_WRONGSEC)
3494 status = server->nfs_client->cl_mvops->find_root_sec(server,
3498 status = nfs4_server_capabilities(server, fhandle);
3500 status = nfs4_do_fsinfo(server, fhandle, info);
3502 return nfs4_map_errors(status);
3505 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3506 struct nfs_fsinfo *info)
3509 struct nfs_fattr *fattr = info->fattr;
3510 struct nfs4_label *label = NULL;
3512 error = nfs4_server_capabilities(server, mntfh);
3514 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3518 label = nfs4_label_alloc(server, GFP_KERNEL);
3520 return PTR_ERR(label);
3522 error = nfs4_proc_getattr(server, mntfh, fattr, label);
3524 dprintk("nfs4_get_root: getattr error = %d\n", -error);
3525 goto err_free_label;
3528 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3529 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3530 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3533 nfs4_label_free(label);
3539 * Get locations and (maybe) other attributes of a referral.
3540 * Note that we'll actually follow the referral later when
3541 * we detect fsid mismatch in inode revalidation
3543 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3544 const struct qstr *name, struct nfs_fattr *fattr,
3545 struct nfs_fh *fhandle)
3547 int status = -ENOMEM;
3548 struct page *page = NULL;
3549 struct nfs4_fs_locations *locations = NULL;
3551 page = alloc_page(GFP_KERNEL);
3554 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3555 if (locations == NULL)
3558 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
3563 * If the fsid didn't change, this is a migration event, not a
3564 * referral. Cause us to drop into the exception handler, which
3565 * will kick off migration recovery.
3567 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3568 dprintk("%s: server did not return a different fsid for"
3569 " a referral at %s\n", __func__, name->name);
3570 status = -NFS4ERR_MOVED;
3573 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3574 nfs_fixup_referral_attributes(&locations->fattr);
3576 /* replace the lookup nfs_fattr with the locations nfs_fattr */
3577 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
3578 memset(fhandle, 0, sizeof(struct nfs_fh));
3586 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3587 struct nfs_fattr *fattr, struct nfs4_label *label)
3589 struct nfs4_getattr_arg args = {
3591 .bitmask = server->attr_bitmask,
3593 struct nfs4_getattr_res res = {
3598 struct rpc_message msg = {
3599 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3604 args.bitmask = nfs4_bitmask(server, label);
3606 nfs_fattr_init(fattr);
3607 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3610 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3611 struct nfs_fattr *fattr, struct nfs4_label *label)
3613 struct nfs4_exception exception = { };
3616 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3617 trace_nfs4_getattr(server, fhandle, fattr, err);
3618 err = nfs4_handle_exception(server, err,
3620 } while (exception.retry);
3625 * The file is not closed if it is opened due to the a request to change
3626 * the size of the file. The open call will not be needed once the
3627 * VFS layer lookup-intents are implemented.
3629 * Close is called when the inode is destroyed.
3630 * If we haven't opened the file for O_WRONLY, we
3631 * need to in the size_change case to obtain a stateid.
3634 * Because OPEN is always done by name in nfsv4, it is
3635 * possible that we opened a different file by the same
3636 * name. We can recognize this race condition, but we
3637 * can't do anything about it besides returning an error.
3639 * This will be fixed with VFS changes (lookup-intent).
3642 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3643 struct iattr *sattr)
3645 struct inode *inode = d_inode(dentry);
3646 struct rpc_cred *cred = NULL;
3647 struct nfs_open_context *ctx = NULL;
3648 struct nfs4_label *label = NULL;
3651 if (pnfs_ld_layoutret_on_setattr(inode) &&
3652 sattr->ia_valid & ATTR_SIZE &&
3653 sattr->ia_size < i_size_read(inode))
3654 pnfs_commit_and_return_layout(inode);
3656 nfs_fattr_init(fattr);
3658 /* Deal with open(O_TRUNC) */
3659 if (sattr->ia_valid & ATTR_OPEN)
3660 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
3662 /* Optimization: if the end result is no change, don't RPC */
3663 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
3666 /* Search for an existing open(O_WRITE) file */
3667 if (sattr->ia_valid & ATTR_FILE) {
3669 ctx = nfs_file_open_context(sattr->ia_file);
3674 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3676 return PTR_ERR(label);
3678 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL, label);
3680 nfs_setattr_update_inode(inode, sattr, fattr);
3681 nfs_setsecurity(inode, fattr, label);
3683 nfs4_label_free(label);
3687 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3688 const struct qstr *name, struct nfs_fh *fhandle,
3689 struct nfs_fattr *fattr, struct nfs4_label *label)
3691 struct nfs_server *server = NFS_SERVER(dir);
3693 struct nfs4_lookup_arg args = {
3694 .bitmask = server->attr_bitmask,
3695 .dir_fh = NFS_FH(dir),
3698 struct nfs4_lookup_res res = {
3704 struct rpc_message msg = {
3705 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3710 args.bitmask = nfs4_bitmask(server, label);
3712 nfs_fattr_init(fattr);
3714 dprintk("NFS call lookup %s\n", name->name);
3715 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
3716 dprintk("NFS reply lookup: %d\n", status);
3720 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
3722 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
3723 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
3724 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3728 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3729 const struct qstr *name, struct nfs_fh *fhandle,
3730 struct nfs_fattr *fattr, struct nfs4_label *label)
3732 struct nfs4_exception exception = { };
3733 struct rpc_clnt *client = *clnt;
3736 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
3737 trace_nfs4_lookup(dir, name, err);
3739 case -NFS4ERR_BADNAME:
3742 case -NFS4ERR_MOVED:
3743 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
3744 if (err == -NFS4ERR_MOVED)
3745 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3747 case -NFS4ERR_WRONGSEC:
3749 if (client != *clnt)
3751 client = nfs4_negotiate_security(client, dir, name);
3753 return PTR_ERR(client);
3755 exception.retry = 1;
3758 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3760 } while (exception.retry);
3765 else if (client != *clnt)
3766 rpc_shutdown_client(client);
3771 static int nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
3772 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3773 struct nfs4_label *label)
3776 struct rpc_clnt *client = NFS_CLIENT(dir);
3778 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
3779 if (client != NFS_CLIENT(dir)) {
3780 rpc_shutdown_client(client);
3781 nfs_fixup_secinfo_attributes(fattr);
3787 nfs4_proc_lookup_mountpoint(struct inode *dir, const struct qstr *name,
3788 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3790 struct rpc_clnt *client = NFS_CLIENT(dir);
3793 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
3795 return ERR_PTR(status);
3796 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
3799 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3801 struct nfs_server *server = NFS_SERVER(inode);
3802 struct nfs4_accessargs args = {
3803 .fh = NFS_FH(inode),
3804 .bitmask = server->cache_consistency_bitmask,
3806 struct nfs4_accessres res = {
3809 struct rpc_message msg = {
3810 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3813 .rpc_cred = entry->cred,
3815 int mode = entry->mask;
3819 * Determine which access bits we want to ask for...
3821 if (mode & MAY_READ)
3822 args.access |= NFS4_ACCESS_READ;
3823 if (S_ISDIR(inode->i_mode)) {
3824 if (mode & MAY_WRITE)
3825 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3826 if (mode & MAY_EXEC)
3827 args.access |= NFS4_ACCESS_LOOKUP;
3829 if (mode & MAY_WRITE)
3830 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3831 if (mode & MAY_EXEC)
3832 args.access |= NFS4_ACCESS_EXECUTE;
3835 res.fattr = nfs_alloc_fattr();
3836 if (res.fattr == NULL)
3839 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3841 nfs_access_set_mask(entry, res.access);
3842 nfs_refresh_inode(inode, res.fattr);
3844 nfs_free_fattr(res.fattr);
3848 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3850 struct nfs4_exception exception = { };
3853 err = _nfs4_proc_access(inode, entry);
3854 trace_nfs4_access(inode, err);
3855 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3857 } while (exception.retry);
3862 * TODO: For the time being, we don't try to get any attributes
3863 * along with any of the zero-copy operations READ, READDIR,
3866 * In the case of the first three, we want to put the GETATTR
3867 * after the read-type operation -- this is because it is hard
3868 * to predict the length of a GETATTR response in v4, and thus
3869 * align the READ data correctly. This means that the GETATTR
3870 * may end up partially falling into the page cache, and we should
3871 * shift it into the 'tail' of the xdr_buf before processing.
3872 * To do this efficiently, we need to know the total length
3873 * of data received, which doesn't seem to be available outside
3876 * In the case of WRITE, we also want to put the GETATTR after
3877 * the operation -- in this case because we want to make sure
3878 * we get the post-operation mtime and size.
3880 * Both of these changes to the XDR layer would in fact be quite
3881 * minor, but I decided to leave them for a subsequent patch.
3883 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3884 unsigned int pgbase, unsigned int pglen)
3886 struct nfs4_readlink args = {
3887 .fh = NFS_FH(inode),
3892 struct nfs4_readlink_res res;
3893 struct rpc_message msg = {
3894 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3899 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
3902 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3903 unsigned int pgbase, unsigned int pglen)
3905 struct nfs4_exception exception = { };
3908 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3909 trace_nfs4_readlink(inode, err);
3910 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3912 } while (exception.retry);
3917 * This is just for mknod. open(O_CREAT) will always do ->open_context().
3920 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
3923 struct nfs_server *server = NFS_SERVER(dir);
3924 struct nfs4_label l, *ilabel = NULL;
3925 struct nfs_open_context *ctx;
3926 struct nfs4_state *state;
3929 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL);
3931 return PTR_ERR(ctx);
3933 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3935 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
3936 sattr->ia_mode &= ~current_umask();
3937 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
3938 if (IS_ERR(state)) {
3939 status = PTR_ERR(state);
3943 nfs4_label_release_security(ilabel);
3944 put_nfs_open_context(ctx);
3948 static int _nfs4_proc_remove(struct inode *dir, const struct qstr *name)
3950 struct nfs_server *server = NFS_SERVER(dir);
3951 struct nfs_removeargs args = {
3955 struct nfs_removeres res = {
3958 struct rpc_message msg = {
3959 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3963 unsigned long timestamp = jiffies;
3966 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
3968 update_changeattr(dir, &res.cinfo, timestamp);
3972 static int nfs4_proc_remove(struct inode *dir, const struct qstr *name)
3974 struct nfs4_exception exception = { };
3977 err = _nfs4_proc_remove(dir, name);
3978 trace_nfs4_remove(dir, name, err);
3979 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3981 } while (exception.retry);
3985 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
3987 struct nfs_server *server = NFS_SERVER(dir);
3988 struct nfs_removeargs *args = msg->rpc_argp;
3989 struct nfs_removeres *res = msg->rpc_resp;
3991 res->server = server;
3992 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
3993 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
3995 nfs_fattr_init(res->dir_attr);
3998 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
4000 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client,
4001 &data->args.seq_args,
4006 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
4008 struct nfs_unlinkdata *data = task->tk_calldata;
4009 struct nfs_removeres *res = &data->res;
4011 if (!nfs4_sequence_done(task, &res->seq_res))
4013 if (nfs4_async_handle_error(task, res->server, NULL,
4014 &data->timeout) == -EAGAIN)
4016 if (task->tk_status == 0)
4017 update_changeattr(dir, &res->cinfo, res->dir_attr->time_start);
4021 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
4023 struct nfs_server *server = NFS_SERVER(dir);
4024 struct nfs_renameargs *arg = msg->rpc_argp;
4025 struct nfs_renameres *res = msg->rpc_resp;
4027 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
4028 res->server = server;
4029 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
4032 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
4034 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client,
4035 &data->args.seq_args,
4040 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
4041 struct inode *new_dir)
4043 struct nfs_renamedata *data = task->tk_calldata;
4044 struct nfs_renameres *res = &data->res;
4046 if (!nfs4_sequence_done(task, &res->seq_res))
4048 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
4051 if (task->tk_status == 0) {
4052 update_changeattr(old_dir, &res->old_cinfo, res->old_fattr->time_start);
4053 if (new_dir != old_dir)
4054 update_changeattr(new_dir, &res->new_cinfo, res->new_fattr->time_start);
4059 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
4061 struct nfs_server *server = NFS_SERVER(inode);
4062 struct nfs4_link_arg arg = {
4063 .fh = NFS_FH(inode),
4064 .dir_fh = NFS_FH(dir),
4066 .bitmask = server->attr_bitmask,
4068 struct nfs4_link_res res = {
4072 struct rpc_message msg = {
4073 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
4077 int status = -ENOMEM;
4079 res.fattr = nfs_alloc_fattr();
4080 if (res.fattr == NULL)
4083 res.label = nfs4_label_alloc(server, GFP_KERNEL);
4084 if (IS_ERR(res.label)) {
4085 status = PTR_ERR(res.label);
4088 arg.bitmask = nfs4_bitmask(server, res.label);
4090 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4092 update_changeattr(dir, &res.cinfo, res.fattr->time_start);
4093 status = nfs_post_op_update_inode(inode, res.fattr);
4095 nfs_setsecurity(inode, res.fattr, res.label);
4099 nfs4_label_free(res.label);
4102 nfs_free_fattr(res.fattr);
4106 static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
4108 struct nfs4_exception exception = { };
4111 err = nfs4_handle_exception(NFS_SERVER(inode),
4112 _nfs4_proc_link(inode, dir, name),
4114 } while (exception.retry);
4118 struct nfs4_createdata {
4119 struct rpc_message msg;
4120 struct nfs4_create_arg arg;
4121 struct nfs4_create_res res;
4123 struct nfs_fattr fattr;
4124 struct nfs4_label *label;
4127 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
4128 const struct qstr *name, struct iattr *sattr, u32 ftype)
4130 struct nfs4_createdata *data;
4132 data = kzalloc(sizeof(*data), GFP_KERNEL);
4134 struct nfs_server *server = NFS_SERVER(dir);
4136 data->label = nfs4_label_alloc(server, GFP_KERNEL);
4137 if (IS_ERR(data->label))
4140 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
4141 data->msg.rpc_argp = &data->arg;
4142 data->msg.rpc_resp = &data->res;
4143 data->arg.dir_fh = NFS_FH(dir);
4144 data->arg.server = server;
4145 data->arg.name = name;
4146 data->arg.attrs = sattr;
4147 data->arg.ftype = ftype;
4148 data->arg.bitmask = nfs4_bitmask(server, data->label);
4149 data->arg.umask = current_umask();
4150 data->res.server = server;
4151 data->res.fh = &data->fh;
4152 data->res.fattr = &data->fattr;
4153 data->res.label = data->label;
4154 nfs_fattr_init(data->res.fattr);
4162 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
4164 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
4165 &data->arg.seq_args, &data->res.seq_res, 1);
4167 update_changeattr(dir, &data->res.dir_cinfo,
4168 data->res.fattr->time_start);
4169 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
4174 static void nfs4_free_createdata(struct nfs4_createdata *data)
4176 nfs4_label_free(data->label);
4180 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
4181 struct page *page, unsigned int len, struct iattr *sattr,
4182 struct nfs4_label *label)
4184 struct nfs4_createdata *data;
4185 int status = -ENAMETOOLONG;
4187 if (len > NFS4_MAXPATHLEN)
4191 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
4195 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
4196 data->arg.u.symlink.pages = &page;
4197 data->arg.u.symlink.len = len;
4198 data->arg.label = label;
4200 status = nfs4_do_create(dir, dentry, data);
4202 nfs4_free_createdata(data);
4207 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
4208 struct page *page, unsigned int len, struct iattr *sattr)
4210 struct nfs4_exception exception = { };
4211 struct nfs4_label l, *label = NULL;
4214 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4217 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
4218 trace_nfs4_symlink(dir, &dentry->d_name, err);
4219 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4221 } while (exception.retry);
4223 nfs4_label_release_security(label);
4227 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4228 struct iattr *sattr, struct nfs4_label *label)
4230 struct nfs4_createdata *data;
4231 int status = -ENOMEM;
4233 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4237 data->arg.label = label;
4238 status = nfs4_do_create(dir, dentry, data);
4240 nfs4_free_createdata(data);
4245 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4246 struct iattr *sattr)
4248 struct nfs_server *server = NFS_SERVER(dir);
4249 struct nfs4_exception exception = { };
4250 struct nfs4_label l, *label = NULL;
4253 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4255 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4256 sattr->ia_mode &= ~current_umask();
4258 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4259 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4260 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4262 } while (exception.retry);
4263 nfs4_label_release_security(label);
4268 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
4269 u64 cookie, struct page **pages, unsigned int count, int plus)
4271 struct inode *dir = d_inode(dentry);
4272 struct nfs4_readdir_arg args = {
4277 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
4280 struct nfs4_readdir_res res;
4281 struct rpc_message msg = {
4282 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4289 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4291 (unsigned long long)cookie);
4292 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
4293 res.pgbase = args.pgbase;
4294 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4296 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
4297 status += args.pgbase;
4300 nfs_invalidate_atime(dir);
4302 dprintk("%s: returns %d\n", __func__, status);
4306 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
4307 u64 cookie, struct page **pages, unsigned int count, int plus)
4309 struct nfs4_exception exception = { };
4312 err = _nfs4_proc_readdir(dentry, cred, cookie,
4313 pages, count, plus);
4314 trace_nfs4_readdir(d_inode(dentry), err);
4315 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
4317 } while (exception.retry);
4321 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4322 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
4324 struct nfs4_createdata *data;
4325 int mode = sattr->ia_mode;
4326 int status = -ENOMEM;
4328 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4333 data->arg.ftype = NF4FIFO;
4334 else if (S_ISBLK(mode)) {
4335 data->arg.ftype = NF4BLK;
4336 data->arg.u.device.specdata1 = MAJOR(rdev);
4337 data->arg.u.device.specdata2 = MINOR(rdev);
4339 else if (S_ISCHR(mode)) {
4340 data->arg.ftype = NF4CHR;
4341 data->arg.u.device.specdata1 = MAJOR(rdev);
4342 data->arg.u.device.specdata2 = MINOR(rdev);
4343 } else if (!S_ISSOCK(mode)) {
4348 data->arg.label = label;
4349 status = nfs4_do_create(dir, dentry, data);
4351 nfs4_free_createdata(data);
4356 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4357 struct iattr *sattr, dev_t rdev)
4359 struct nfs_server *server = NFS_SERVER(dir);
4360 struct nfs4_exception exception = { };
4361 struct nfs4_label l, *label = NULL;
4364 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4366 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4367 sattr->ia_mode &= ~current_umask();
4369 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4370 trace_nfs4_mknod(dir, &dentry->d_name, err);
4371 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4373 } while (exception.retry);
4375 nfs4_label_release_security(label);
4380 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4381 struct nfs_fsstat *fsstat)
4383 struct nfs4_statfs_arg args = {
4385 .bitmask = server->attr_bitmask,
4387 struct nfs4_statfs_res res = {
4390 struct rpc_message msg = {
4391 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4396 nfs_fattr_init(fsstat->fattr);
4397 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4400 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4402 struct nfs4_exception exception = { };
4405 err = nfs4_handle_exception(server,
4406 _nfs4_proc_statfs(server, fhandle, fsstat),
4408 } while (exception.retry);
4412 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4413 struct nfs_fsinfo *fsinfo)
4415 struct nfs4_fsinfo_arg args = {
4417 .bitmask = server->attr_bitmask,
4419 struct nfs4_fsinfo_res res = {
4422 struct rpc_message msg = {
4423 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4428 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4431 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4433 struct nfs4_exception exception = { };
4434 unsigned long now = jiffies;
4438 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
4439 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
4441 nfs4_set_lease_period(server->nfs_client,
4442 fsinfo->lease_time * HZ,
4446 err = nfs4_handle_exception(server, err, &exception);
4447 } while (exception.retry);
4451 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4455 nfs_fattr_init(fsinfo->fattr);
4456 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
4458 /* block layout checks this! */
4459 server->pnfs_blksize = fsinfo->blksize;
4460 set_pnfs_layoutdriver(server, fhandle, fsinfo);
4466 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4467 struct nfs_pathconf *pathconf)
4469 struct nfs4_pathconf_arg args = {
4471 .bitmask = server->attr_bitmask,
4473 struct nfs4_pathconf_res res = {
4474 .pathconf = pathconf,
4476 struct rpc_message msg = {
4477 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4482 /* None of the pathconf attributes are mandatory to implement */
4483 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4484 memset(pathconf, 0, sizeof(*pathconf));
4488 nfs_fattr_init(pathconf->fattr);
4489 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4492 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4493 struct nfs_pathconf *pathconf)
4495 struct nfs4_exception exception = { };
4499 err = nfs4_handle_exception(server,
4500 _nfs4_proc_pathconf(server, fhandle, pathconf),
4502 } while (exception.retry);
4506 int nfs4_set_rw_stateid(nfs4_stateid *stateid,
4507 const struct nfs_open_context *ctx,
4508 const struct nfs_lock_context *l_ctx,
4511 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL);
4513 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4515 static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4516 const struct nfs_open_context *ctx,
4517 const struct nfs_lock_context *l_ctx,
4520 nfs4_stateid current_stateid;
4522 /* If the current stateid represents a lost lock, then exit */
4523 if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode) == -EIO)
4525 return nfs4_stateid_match(stateid, ¤t_stateid);
4528 static bool nfs4_error_stateid_expired(int err)
4531 case -NFS4ERR_DELEG_REVOKED:
4532 case -NFS4ERR_ADMIN_REVOKED:
4533 case -NFS4ERR_BAD_STATEID:
4534 case -NFS4ERR_STALE_STATEID:
4535 case -NFS4ERR_OLD_STATEID:
4536 case -NFS4ERR_OPENMODE:
4537 case -NFS4ERR_EXPIRED:
4543 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
4545 struct nfs_server *server = NFS_SERVER(hdr->inode);
4547 trace_nfs4_read(hdr, task->tk_status);
4548 if (task->tk_status < 0) {
4549 struct nfs4_exception exception = {
4550 .inode = hdr->inode,
4551 .state = hdr->args.context->state,
4552 .stateid = &hdr->args.stateid,
4554 task->tk_status = nfs4_async_handle_exception(task,
4555 server, task->tk_status, &exception);
4556 if (exception.retry) {
4557 rpc_restart_call_prepare(task);
4562 if (task->tk_status > 0)
4563 renew_lease(server, hdr->timestamp);
4567 static bool nfs4_read_stateid_changed(struct rpc_task *task,
4568 struct nfs_pgio_args *args)
4571 if (!nfs4_error_stateid_expired(task->tk_status) ||
4572 nfs4_stateid_is_current(&args->stateid,
4577 rpc_restart_call_prepare(task);
4581 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4584 dprintk("--> %s\n", __func__);
4586 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4588 if (nfs4_read_stateid_changed(task, &hdr->args))
4590 if (task->tk_status > 0)
4591 nfs_invalidate_atime(hdr->inode);
4592 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4593 nfs4_read_done_cb(task, hdr);
4596 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4597 struct rpc_message *msg)
4599 hdr->timestamp = jiffies;
4600 if (!hdr->pgio_done_cb)
4601 hdr->pgio_done_cb = nfs4_read_done_cb;
4602 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
4603 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
4606 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4607 struct nfs_pgio_header *hdr)
4609 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client,
4610 &hdr->args.seq_args,
4614 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4615 hdr->args.lock_context,
4616 hdr->rw_ops->rw_mode) == -EIO)
4618 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
4623 static int nfs4_write_done_cb(struct rpc_task *task,
4624 struct nfs_pgio_header *hdr)
4626 struct inode *inode = hdr->inode;
4628 trace_nfs4_write(hdr, task->tk_status);
4629 if (task->tk_status < 0) {
4630 struct nfs4_exception exception = {
4631 .inode = hdr->inode,
4632 .state = hdr->args.context->state,
4633 .stateid = &hdr->args.stateid,
4635 task->tk_status = nfs4_async_handle_exception(task,
4636 NFS_SERVER(inode), task->tk_status,
4638 if (exception.retry) {
4639 rpc_restart_call_prepare(task);
4643 if (task->tk_status >= 0) {
4644 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4645 nfs_writeback_update_inode(hdr);
4650 static bool nfs4_write_stateid_changed(struct rpc_task *task,
4651 struct nfs_pgio_args *args)
4654 if (!nfs4_error_stateid_expired(task->tk_status) ||
4655 nfs4_stateid_is_current(&args->stateid,
4660 rpc_restart_call_prepare(task);
4664 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4666 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4668 if (nfs4_write_stateid_changed(task, &hdr->args))
4670 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4671 nfs4_write_done_cb(task, hdr);
4675 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
4677 /* Don't request attributes for pNFS or O_DIRECT writes */
4678 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
4680 /* Otherwise, request attributes if and only if we don't hold
4683 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
4686 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4687 struct rpc_message *msg)
4689 struct nfs_server *server = NFS_SERVER(hdr->inode);
4691 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4692 hdr->args.bitmask = NULL;
4693 hdr->res.fattr = NULL;
4695 hdr->args.bitmask = server->cache_consistency_bitmask;
4697 if (!hdr->pgio_done_cb)
4698 hdr->pgio_done_cb = nfs4_write_done_cb;
4699 hdr->res.server = server;
4700 hdr->timestamp = jiffies;
4702 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
4703 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
4706 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
4708 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client,
4709 &data->args.seq_args,
4714 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
4716 struct inode *inode = data->inode;
4718 trace_nfs4_commit(data, task->tk_status);
4719 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4720 NULL, NULL) == -EAGAIN) {
4721 rpc_restart_call_prepare(task);
4727 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
4729 if (!nfs4_sequence_done(task, &data->res.seq_res))
4731 return data->commit_done_cb(task, data);
4734 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
4736 struct nfs_server *server = NFS_SERVER(data->inode);
4738 if (data->commit_done_cb == NULL)
4739 data->commit_done_cb = nfs4_commit_done_cb;
4740 data->res.server = server;
4741 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
4742 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4745 struct nfs4_renewdata {
4746 struct nfs_client *client;
4747 unsigned long timestamp;
4751 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4752 * standalone procedure for queueing an asynchronous RENEW.
4754 static void nfs4_renew_release(void *calldata)
4756 struct nfs4_renewdata *data = calldata;
4757 struct nfs_client *clp = data->client;
4759 if (atomic_read(&clp->cl_count) > 1)
4760 nfs4_schedule_state_renewal(clp);
4761 nfs_put_client(clp);
4765 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
4767 struct nfs4_renewdata *data = calldata;
4768 struct nfs_client *clp = data->client;
4769 unsigned long timestamp = data->timestamp;
4771 trace_nfs4_renew_async(clp, task->tk_status);
4772 switch (task->tk_status) {
4775 case -NFS4ERR_LEASE_MOVED:
4776 nfs4_schedule_lease_moved_recovery(clp);
4779 /* Unless we're shutting down, schedule state recovery! */
4780 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4782 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
4783 nfs4_schedule_lease_recovery(clp);
4786 nfs4_schedule_path_down_recovery(clp);
4788 do_renew_lease(clp, timestamp);
4791 static const struct rpc_call_ops nfs4_renew_ops = {
4792 .rpc_call_done = nfs4_renew_done,
4793 .rpc_release = nfs4_renew_release,
4796 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
4798 struct rpc_message msg = {
4799 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4803 struct nfs4_renewdata *data;
4805 if (renew_flags == 0)
4807 if (!atomic_inc_not_zero(&clp->cl_count))
4809 data = kmalloc(sizeof(*data), GFP_NOFS);
4813 data->timestamp = jiffies;
4814 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
4815 &nfs4_renew_ops, data);
4818 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
4820 struct rpc_message msg = {
4821 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4825 unsigned long now = jiffies;
4828 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4831 do_renew_lease(clp, now);
4835 static inline int nfs4_server_supports_acls(struct nfs_server *server)
4837 return server->caps & NFS_CAP_ACLS;
4840 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4841 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
4844 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
4846 static int buf_to_pages_noslab(const void *buf, size_t buflen,
4847 struct page **pages)
4849 struct page *newpage, **spages;
4855 len = min_t(size_t, PAGE_SIZE, buflen);
4856 newpage = alloc_page(GFP_KERNEL);
4858 if (newpage == NULL)
4860 memcpy(page_address(newpage), buf, len);
4865 } while (buflen != 0);
4871 __free_page(spages[rc-1]);
4875 struct nfs4_cached_acl {
4881 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4883 struct nfs_inode *nfsi = NFS_I(inode);
4885 spin_lock(&inode->i_lock);
4886 kfree(nfsi->nfs4_acl);
4887 nfsi->nfs4_acl = acl;
4888 spin_unlock(&inode->i_lock);
4891 static void nfs4_zap_acl_attr(struct inode *inode)
4893 nfs4_set_cached_acl(inode, NULL);
4896 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4898 struct nfs_inode *nfsi = NFS_I(inode);
4899 struct nfs4_cached_acl *acl;
4902 spin_lock(&inode->i_lock);
4903 acl = nfsi->nfs4_acl;
4906 if (buf == NULL) /* user is just asking for length */
4908 if (acl->cached == 0)
4910 ret = -ERANGE; /* see getxattr(2) man page */
4911 if (acl->len > buflen)
4913 memcpy(buf, acl->data, acl->len);
4917 spin_unlock(&inode->i_lock);
4921 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
4923 struct nfs4_cached_acl *acl;
4924 size_t buflen = sizeof(*acl) + acl_len;
4926 if (buflen <= PAGE_SIZE) {
4927 acl = kmalloc(buflen, GFP_KERNEL);
4931 _copy_from_pages(acl->data, pages, pgbase, acl_len);
4933 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4940 nfs4_set_cached_acl(inode, acl);
4944 * The getxattr API returns the required buffer length when called with a
4945 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4946 * the required buf. On a NULL buf, we send a page of data to the server
4947 * guessing that the ACL request can be serviced by a page. If so, we cache
4948 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4949 * the cache. If not so, we throw away the page, and cache the required
4950 * length. The next getxattr call will then produce another round trip to
4951 * the server, this time with the input buf of the required size.
4953 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4955 struct page *pages[NFS4ACL_MAXPAGES + 1] = {NULL, };
4956 struct nfs_getaclargs args = {
4957 .fh = NFS_FH(inode),
4961 struct nfs_getaclres res = {
4964 struct rpc_message msg = {
4965 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4969 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1;
4970 int ret = -ENOMEM, i;
4972 if (npages > ARRAY_SIZE(pages))
4975 for (i = 0; i < npages; i++) {
4976 pages[i] = alloc_page(GFP_KERNEL);
4981 /* for decoding across pages */
4982 res.acl_scratch = alloc_page(GFP_KERNEL);
4983 if (!res.acl_scratch)
4986 args.acl_len = npages * PAGE_SIZE;
4988 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
4989 __func__, buf, buflen, npages, args.acl_len);
4990 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4991 &msg, &args.seq_args, &res.seq_res, 0);
4995 /* Handle the case where the passed-in buffer is too short */
4996 if (res.acl_flags & NFS4_ACL_TRUNC) {
4997 /* Did the user only issue a request for the acl length? */
5003 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
5005 if (res.acl_len > buflen) {
5009 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
5014 for (i = 0; i < npages; i++)
5016 __free_page(pages[i]);
5017 if (res.acl_scratch)
5018 __free_page(res.acl_scratch);
5022 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
5024 struct nfs4_exception exception = { };
5027 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
5028 trace_nfs4_get_acl(inode, ret);
5031 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
5032 } while (exception.retry);
5036 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
5038 struct nfs_server *server = NFS_SERVER(inode);
5041 if (!nfs4_server_supports_acls(server))
5043 ret = nfs_revalidate_inode(server, inode);
5046 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
5047 nfs_zap_acl_cache(inode);
5048 ret = nfs4_read_cached_acl(inode, buf, buflen);
5050 /* -ENOENT is returned if there is no ACL or if there is an ACL
5051 * but no cached acl data, just the acl length */
5053 return nfs4_get_acl_uncached(inode, buf, buflen);
5056 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5058 struct nfs_server *server = NFS_SERVER(inode);
5059 struct page *pages[NFS4ACL_MAXPAGES];
5060 struct nfs_setaclargs arg = {
5061 .fh = NFS_FH(inode),
5065 struct nfs_setaclres res;
5066 struct rpc_message msg = {
5067 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
5071 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
5074 if (!nfs4_server_supports_acls(server))
5076 if (npages > ARRAY_SIZE(pages))
5078 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
5081 nfs4_inode_return_delegation(inode);
5082 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5085 * Free each page after tx, so the only ref left is
5086 * held by the network stack
5089 put_page(pages[i-1]);
5092 * Acl update can result in inode attribute update.
5093 * so mark the attribute cache invalid.
5095 spin_lock(&inode->i_lock);
5096 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
5097 spin_unlock(&inode->i_lock);
5098 nfs_access_zap_cache(inode);
5099 nfs_zap_acl_cache(inode);
5103 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5105 struct nfs4_exception exception = { };
5108 err = __nfs4_proc_set_acl(inode, buf, buflen);
5109 trace_nfs4_set_acl(inode, err);
5110 err = nfs4_handle_exception(NFS_SERVER(inode), err,
5112 } while (exception.retry);
5116 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
5117 static int _nfs4_get_security_label(struct inode *inode, void *buf,
5120 struct nfs_server *server = NFS_SERVER(inode);
5121 struct nfs_fattr fattr;
5122 struct nfs4_label label = {0, 0, buflen, buf};
5124 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
5125 struct nfs4_getattr_arg arg = {
5126 .fh = NFS_FH(inode),
5129 struct nfs4_getattr_res res = {
5134 struct rpc_message msg = {
5135 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
5141 nfs_fattr_init(&fattr);
5143 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
5146 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
5148 if (buflen < label.len)
5153 static int nfs4_get_security_label(struct inode *inode, void *buf,
5156 struct nfs4_exception exception = { };
5159 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5163 err = _nfs4_get_security_label(inode, buf, buflen);
5164 trace_nfs4_get_security_label(inode, err);
5165 err = nfs4_handle_exception(NFS_SERVER(inode), err,
5167 } while (exception.retry);
5171 static int _nfs4_do_set_security_label(struct inode *inode,
5172 struct nfs4_label *ilabel,
5173 struct nfs_fattr *fattr,
5174 struct nfs4_label *olabel)
5177 struct iattr sattr = {0};
5178 struct nfs_server *server = NFS_SERVER(inode);
5179 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
5180 struct nfs_setattrargs arg = {
5181 .fh = NFS_FH(inode),
5187 struct nfs_setattrres res = {
5192 struct rpc_message msg = {
5193 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
5199 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
5201 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5203 dprintk("%s failed: %d\n", __func__, status);
5208 static int nfs4_do_set_security_label(struct inode *inode,
5209 struct nfs4_label *ilabel,
5210 struct nfs_fattr *fattr,
5211 struct nfs4_label *olabel)
5213 struct nfs4_exception exception = { };
5217 err = _nfs4_do_set_security_label(inode, ilabel,
5219 trace_nfs4_set_security_label(inode, err);
5220 err = nfs4_handle_exception(NFS_SERVER(inode), err,
5222 } while (exception.retry);
5227 nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen)
5229 struct nfs4_label ilabel, *olabel = NULL;
5230 struct nfs_fattr fattr;
5231 struct rpc_cred *cred;
5234 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5237 nfs_fattr_init(&fattr);
5241 ilabel.label = (char *)buf;
5242 ilabel.len = buflen;
5244 cred = rpc_lookup_cred();
5246 return PTR_ERR(cred);
5248 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5249 if (IS_ERR(olabel)) {
5250 status = -PTR_ERR(olabel);
5254 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5256 nfs_setsecurity(inode, &fattr, olabel);
5258 nfs4_label_free(olabel);
5263 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */
5266 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5267 nfs4_verifier *bootverf)
5271 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5272 /* An impossible timestamp guarantees this value
5273 * will never match a generated boot time. */
5274 verf[0] = cpu_to_be32(U32_MAX);
5275 verf[1] = cpu_to_be32(U32_MAX);
5277 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
5278 u64 ns = ktime_to_ns(nn->boot_time);
5280 verf[0] = cpu_to_be32(ns >> 32);
5281 verf[1] = cpu_to_be32(ns);
5283 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5287 nfs4_init_nonuniform_client_string(struct nfs_client *clp)
5292 if (clp->cl_owner_id != NULL)
5296 len = 14 + strlen(clp->cl_ipaddr) + 1 +
5297 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5299 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5303 if (len > NFS4_OPAQUE_LIMIT + 1)
5307 * Since this string is allocated at mount time, and held until the
5308 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5309 * about a memory-reclaim deadlock.
5311 str = kmalloc(len, GFP_KERNEL);
5316 scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
5318 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5319 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
5322 clp->cl_owner_id = str;
5327 nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5332 len = 10 + 10 + 1 + 10 + 1 +
5333 strlen(nfs4_client_id_uniquifier) + 1 +
5334 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5336 if (len > NFS4_OPAQUE_LIMIT + 1)
5340 * Since this string is allocated at mount time, and held until the
5341 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5342 * about a memory-reclaim deadlock.
5344 str = kmalloc(len, GFP_KERNEL);
5348 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
5349 clp->rpc_ops->version, clp->cl_minorversion,
5350 nfs4_client_id_uniquifier,
5351 clp->cl_rpcclient->cl_nodename);
5352 clp->cl_owner_id = str;
5357 nfs4_init_uniform_client_string(struct nfs_client *clp)
5362 if (clp->cl_owner_id != NULL)
5365 if (nfs4_client_id_uniquifier[0] != '\0')
5366 return nfs4_init_uniquifier_client_string(clp);
5368 len = 10 + 10 + 1 + 10 + 1 +
5369 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5371 if (len > NFS4_OPAQUE_LIMIT + 1)
5375 * Since this string is allocated at mount time, and held until the
5376 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5377 * about a memory-reclaim deadlock.
5379 str = kmalloc(len, GFP_KERNEL);
5383 scnprintf(str, len, "Linux NFSv%u.%u %s",
5384 clp->rpc_ops->version, clp->cl_minorversion,
5385 clp->cl_rpcclient->cl_nodename);
5386 clp->cl_owner_id = str;
5391 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5392 * services. Advertise one based on the address family of the
5396 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5398 if (strchr(clp->cl_ipaddr, ':') != NULL)
5399 return scnprintf(buf, len, "tcp6");
5401 return scnprintf(buf, len, "tcp");
5404 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5406 struct nfs4_setclientid *sc = calldata;
5408 if (task->tk_status == 0)
5409 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5412 static const struct rpc_call_ops nfs4_setclientid_ops = {
5413 .rpc_call_done = nfs4_setclientid_done,
5417 * nfs4_proc_setclientid - Negotiate client ID
5418 * @clp: state data structure
5419 * @program: RPC program for NFSv4 callback service
5420 * @port: IP port number for NFS4 callback service
5421 * @cred: RPC credential to use for this call
5422 * @res: where to place the result
5424 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5426 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5427 unsigned short port, struct rpc_cred *cred,
5428 struct nfs4_setclientid_res *res)
5430 nfs4_verifier sc_verifier;
5431 struct nfs4_setclientid setclientid = {
5432 .sc_verifier = &sc_verifier,
5436 struct rpc_message msg = {
5437 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5438 .rpc_argp = &setclientid,
5442 struct rpc_task *task;
5443 struct rpc_task_setup task_setup_data = {
5444 .rpc_client = clp->cl_rpcclient,
5445 .rpc_message = &msg,
5446 .callback_ops = &nfs4_setclientid_ops,
5447 .callback_data = &setclientid,
5448 .flags = RPC_TASK_TIMEOUT,
5452 /* nfs_client_id4 */
5453 nfs4_init_boot_verifier(clp, &sc_verifier);
5455 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5456 status = nfs4_init_uniform_client_string(clp);
5458 status = nfs4_init_nonuniform_client_string(clp);
5464 setclientid.sc_netid_len =
5465 nfs4_init_callback_netid(clp,
5466 setclientid.sc_netid,
5467 sizeof(setclientid.sc_netid));
5468 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
5469 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
5470 clp->cl_ipaddr, port >> 8, port & 255);
5472 dprintk("NFS call setclientid auth=%s, '%s'\n",
5473 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5475 task = rpc_run_task(&task_setup_data);
5477 status = PTR_ERR(task);
5480 status = task->tk_status;
5481 if (setclientid.sc_cred) {
5482 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5483 put_rpccred(setclientid.sc_cred);
5487 trace_nfs4_setclientid(clp, status);
5488 dprintk("NFS reply setclientid: %d\n", status);
5493 * nfs4_proc_setclientid_confirm - Confirm client ID
5494 * @clp: state data structure
5495 * @res: result of a previous SETCLIENTID
5496 * @cred: RPC credential to use for this call
5498 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5500 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
5501 struct nfs4_setclientid_res *arg,
5502 struct rpc_cred *cred)
5504 struct rpc_message msg = {
5505 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
5511 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5512 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5514 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5515 trace_nfs4_setclientid_confirm(clp, status);
5516 dprintk("NFS reply setclientid_confirm: %d\n", status);
5520 struct nfs4_delegreturndata {
5521 struct nfs4_delegreturnargs args;
5522 struct nfs4_delegreturnres res;
5524 nfs4_stateid stateid;
5525 unsigned long timestamp;
5527 struct nfs4_layoutreturn_args arg;
5528 struct nfs4_layoutreturn_res res;
5529 struct nfs4_xdr_opaque_data ld_private;
5533 struct nfs_fattr fattr;
5535 struct inode *inode;
5538 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5540 struct nfs4_delegreturndata *data = calldata;
5542 if (!nfs4_sequence_done(task, &data->res.seq_res))
5545 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
5547 /* Handle Layoutreturn errors */
5548 if (data->args.lr_args && task->tk_status != 0) {
5549 switch(data->res.lr_ret) {
5551 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
5554 data->args.lr_args = NULL;
5555 data->res.lr_res = NULL;
5557 case -NFS4ERR_ADMIN_REVOKED:
5558 case -NFS4ERR_DELEG_REVOKED:
5559 case -NFS4ERR_EXPIRED:
5560 case -NFS4ERR_BAD_STATEID:
5561 case -NFS4ERR_OLD_STATEID:
5562 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
5563 case -NFS4ERR_WRONG_CRED:
5564 data->args.lr_args = NULL;
5565 data->res.lr_res = NULL;
5566 data->res.lr_ret = 0;
5567 rpc_restart_call_prepare(task);
5572 switch (task->tk_status) {
5574 renew_lease(data->res.server, data->timestamp);
5576 case -NFS4ERR_ADMIN_REVOKED:
5577 case -NFS4ERR_DELEG_REVOKED:
5578 case -NFS4ERR_EXPIRED:
5579 nfs4_free_revoked_stateid(data->res.server,
5581 task->tk_msg.rpc_cred);
5582 case -NFS4ERR_BAD_STATEID:
5583 case -NFS4ERR_OLD_STATEID:
5584 case -NFS4ERR_STALE_STATEID:
5585 task->tk_status = 0;
5587 case -NFS4ERR_ACCESS:
5588 if (data->args.bitmask) {
5589 data->args.bitmask = NULL;
5590 data->res.fattr = NULL;
5591 task->tk_status = 0;
5592 rpc_restart_call_prepare(task);
5596 if (nfs4_async_handle_error(task, data->res.server,
5597 NULL, NULL) == -EAGAIN) {
5598 rpc_restart_call_prepare(task);
5602 data->rpc_status = task->tk_status;
5605 static void nfs4_delegreturn_release(void *calldata)
5607 struct nfs4_delegreturndata *data = calldata;
5608 struct inode *inode = data->inode;
5612 pnfs_roc_release(&data->lr.arg, &data->lr.res,
5614 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5615 nfs_iput_and_deactive(inode);
5620 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5622 struct nfs4_delegreturndata *d_data;
5624 d_data = (struct nfs4_delegreturndata *)data;
5626 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task))
5629 nfs4_setup_sequence(d_data->res.server->nfs_client,
5630 &d_data->args.seq_args,
5631 &d_data->res.seq_res,
5635 static const struct rpc_call_ops nfs4_delegreturn_ops = {
5636 .rpc_call_prepare = nfs4_delegreturn_prepare,
5637 .rpc_call_done = nfs4_delegreturn_done,
5638 .rpc_release = nfs4_delegreturn_release,
5641 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5643 struct nfs4_delegreturndata *data;
5644 struct nfs_server *server = NFS_SERVER(inode);
5645 struct rpc_task *task;
5646 struct rpc_message msg = {
5647 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5650 struct rpc_task_setup task_setup_data = {
5651 .rpc_client = server->client,
5652 .rpc_message = &msg,
5653 .callback_ops = &nfs4_delegreturn_ops,
5654 .flags = RPC_TASK_ASYNC,
5658 data = kzalloc(sizeof(*data), GFP_NOFS);
5661 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
5663 nfs4_state_protect(server->nfs_client,
5664 NFS_SP4_MACH_CRED_CLEANUP,
5665 &task_setup_data.rpc_client, &msg);
5667 data->args.fhandle = &data->fh;
5668 data->args.stateid = &data->stateid;
5669 data->args.bitmask = server->cache_consistency_bitmask;
5670 nfs_copy_fh(&data->fh, NFS_FH(inode));
5671 nfs4_stateid_copy(&data->stateid, stateid);
5672 data->res.fattr = &data->fattr;
5673 data->res.server = server;
5674 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
5675 data->lr.arg.ld_private = &data->lr.ld_private;
5676 nfs_fattr_init(data->res.fattr);
5677 data->timestamp = jiffies;
5678 data->rpc_status = 0;
5679 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, cred);
5680 data->inode = nfs_igrab_and_active(inode);
5683 data->args.lr_args = &data->lr.arg;
5684 data->res.lr_res = &data->lr.res;
5686 } else if (data->lr.roc) {
5687 pnfs_roc_release(&data->lr.arg, &data->lr.res, 0);
5688 data->lr.roc = false;
5691 task_setup_data.callback_data = data;
5692 msg.rpc_argp = &data->args;
5693 msg.rpc_resp = &data->res;
5694 task = rpc_run_task(&task_setup_data);
5696 return PTR_ERR(task);
5699 status = rpc_wait_for_completion_task(task);
5702 status = data->rpc_status;
5708 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5710 struct nfs_server *server = NFS_SERVER(inode);
5711 struct nfs4_exception exception = { };
5714 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
5715 trace_nfs4_delegreturn(inode, stateid, err);
5717 case -NFS4ERR_STALE_STATEID:
5718 case -NFS4ERR_EXPIRED:
5722 err = nfs4_handle_exception(server, err, &exception);
5723 } while (exception.retry);
5727 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5729 struct inode *inode = state->inode;
5730 struct nfs_server *server = NFS_SERVER(inode);
5731 struct nfs_client *clp = server->nfs_client;
5732 struct nfs_lockt_args arg = {
5733 .fh = NFS_FH(inode),
5736 struct nfs_lockt_res res = {
5739 struct rpc_message msg = {
5740 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5743 .rpc_cred = state->owner->so_cred,
5745 struct nfs4_lock_state *lsp;
5748 arg.lock_owner.clientid = clp->cl_clientid;
5749 status = nfs4_set_lock_state(state, request);
5752 lsp = request->fl_u.nfs4_fl.owner;
5753 arg.lock_owner.id = lsp->ls_seqid.owner_id;
5754 arg.lock_owner.s_dev = server->s_dev;
5755 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5758 request->fl_type = F_UNLCK;
5760 case -NFS4ERR_DENIED:
5763 request->fl_ops->fl_release_private(request);
5764 request->fl_ops = NULL;
5769 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5771 struct nfs4_exception exception = { };
5775 err = _nfs4_proc_getlk(state, cmd, request);
5776 trace_nfs4_get_lock(request, state, cmd, err);
5777 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
5779 } while (exception.retry);
5783 struct nfs4_unlockdata {
5784 struct nfs_locku_args arg;
5785 struct nfs_locku_res res;
5786 struct nfs4_lock_state *lsp;
5787 struct nfs_open_context *ctx;
5788 struct file_lock fl;
5789 struct nfs_server *server;
5790 unsigned long timestamp;
5793 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5794 struct nfs_open_context *ctx,
5795 struct nfs4_lock_state *lsp,
5796 struct nfs_seqid *seqid)
5798 struct nfs4_unlockdata *p;
5799 struct inode *inode = lsp->ls_state->inode;
5801 p = kzalloc(sizeof(*p), GFP_NOFS);
5804 p->arg.fh = NFS_FH(inode);
5806 p->arg.seqid = seqid;
5807 p->res.seqid = seqid;
5809 atomic_inc(&lsp->ls_count);
5810 /* Ensure we don't close file until we're done freeing locks! */
5811 p->ctx = get_nfs_open_context(ctx);
5812 memcpy(&p->fl, fl, sizeof(p->fl));
5813 p->server = NFS_SERVER(inode);
5817 static void nfs4_locku_release_calldata(void *data)
5819 struct nfs4_unlockdata *calldata = data;
5820 nfs_free_seqid(calldata->arg.seqid);
5821 nfs4_put_lock_state(calldata->lsp);
5822 put_nfs_open_context(calldata->ctx);
5826 static void nfs4_locku_done(struct rpc_task *task, void *data)
5828 struct nfs4_unlockdata *calldata = data;
5830 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5832 switch (task->tk_status) {
5834 renew_lease(calldata->server, calldata->timestamp);
5835 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl);
5836 if (nfs4_update_lock_stateid(calldata->lsp,
5837 &calldata->res.stateid))
5839 case -NFS4ERR_ADMIN_REVOKED:
5840 case -NFS4ERR_EXPIRED:
5841 nfs4_free_revoked_stateid(calldata->server,
5842 &calldata->arg.stateid,
5843 task->tk_msg.rpc_cred);
5844 case -NFS4ERR_BAD_STATEID:
5845 case -NFS4ERR_OLD_STATEID:
5846 case -NFS4ERR_STALE_STATEID:
5847 if (!nfs4_stateid_match(&calldata->arg.stateid,
5848 &calldata->lsp->ls_stateid))
5849 rpc_restart_call_prepare(task);
5852 if (nfs4_async_handle_error(task, calldata->server,
5853 NULL, NULL) == -EAGAIN)
5854 rpc_restart_call_prepare(task);
5856 nfs_release_seqid(calldata->arg.seqid);
5859 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
5861 struct nfs4_unlockdata *calldata = data;
5863 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
5865 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
5866 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
5867 /* Note: exit _without_ running nfs4_locku_done */
5870 calldata->timestamp = jiffies;
5871 if (nfs4_setup_sequence(calldata->server->nfs_client,
5872 &calldata->arg.seq_args,
5873 &calldata->res.seq_res,
5875 nfs_release_seqid(calldata->arg.seqid);
5878 task->tk_action = NULL;
5880 nfs4_sequence_done(task, &calldata->res.seq_res);
5883 static const struct rpc_call_ops nfs4_locku_ops = {
5884 .rpc_call_prepare = nfs4_locku_prepare,
5885 .rpc_call_done = nfs4_locku_done,
5886 .rpc_release = nfs4_locku_release_calldata,
5889 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5890 struct nfs_open_context *ctx,
5891 struct nfs4_lock_state *lsp,
5892 struct nfs_seqid *seqid)
5894 struct nfs4_unlockdata *data;
5895 struct rpc_message msg = {
5896 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5897 .rpc_cred = ctx->cred,
5899 struct rpc_task_setup task_setup_data = {
5900 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5901 .rpc_message = &msg,
5902 .callback_ops = &nfs4_locku_ops,
5903 .workqueue = nfsiod_workqueue,
5904 .flags = RPC_TASK_ASYNC,
5907 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5908 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5910 /* Ensure this is an unlock - when canceling a lock, the
5911 * canceled lock is passed in, and it won't be an unlock.
5913 fl->fl_type = F_UNLCK;
5915 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5917 nfs_free_seqid(seqid);
5918 return ERR_PTR(-ENOMEM);
5921 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5922 msg.rpc_argp = &data->arg;
5923 msg.rpc_resp = &data->res;
5924 task_setup_data.callback_data = data;
5925 return rpc_run_task(&task_setup_data);
5928 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5930 struct inode *inode = state->inode;
5931 struct nfs4_state_owner *sp = state->owner;
5932 struct nfs_inode *nfsi = NFS_I(inode);
5933 struct nfs_seqid *seqid;
5934 struct nfs4_lock_state *lsp;
5935 struct rpc_task *task;
5936 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
5938 unsigned char fl_flags = request->fl_flags;
5940 status = nfs4_set_lock_state(state, request);
5941 /* Unlock _before_ we do the RPC call */
5942 request->fl_flags |= FL_EXISTS;
5943 /* Exclude nfs_delegation_claim_locks() */
5944 mutex_lock(&sp->so_delegreturn_mutex);
5945 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
5946 down_read(&nfsi->rwsem);
5947 if (locks_lock_inode_wait(inode, request) == -ENOENT) {
5948 up_read(&nfsi->rwsem);
5949 mutex_unlock(&sp->so_delegreturn_mutex);
5952 up_read(&nfsi->rwsem);
5953 mutex_unlock(&sp->so_delegreturn_mutex);
5956 /* Is this a delegated lock? */
5957 lsp = request->fl_u.nfs4_fl.owner;
5958 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5960 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5961 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
5965 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
5966 status = PTR_ERR(task);
5969 status = rpc_wait_for_completion_task(task);
5972 request->fl_flags = fl_flags;
5973 trace_nfs4_unlock(request, state, F_SETLK, status);
5977 struct nfs4_lockdata {
5978 struct nfs_lock_args arg;
5979 struct nfs_lock_res res;
5980 struct nfs4_lock_state *lsp;
5981 struct nfs_open_context *ctx;
5982 struct file_lock fl;
5983 unsigned long timestamp;
5986 struct nfs_server *server;
5989 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
5990 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5993 struct nfs4_lockdata *p;
5994 struct inode *inode = lsp->ls_state->inode;
5995 struct nfs_server *server = NFS_SERVER(inode);
5996 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
5998 p = kzalloc(sizeof(*p), gfp_mask);
6002 p->arg.fh = NFS_FH(inode);
6004 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
6005 if (IS_ERR(p->arg.open_seqid))
6007 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
6008 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
6009 if (IS_ERR(p->arg.lock_seqid))
6010 goto out_free_seqid;
6011 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
6012 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
6013 p->arg.lock_owner.s_dev = server->s_dev;
6014 p->res.lock_seqid = p->arg.lock_seqid;
6017 atomic_inc(&lsp->ls_count);
6018 p->ctx = get_nfs_open_context(ctx);
6019 memcpy(&p->fl, fl, sizeof(p->fl));
6022 nfs_free_seqid(p->arg.open_seqid);
6028 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
6030 struct nfs4_lockdata *data = calldata;
6031 struct nfs4_state *state = data->lsp->ls_state;
6033 dprintk("%s: begin!\n", __func__);
6034 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
6036 /* Do we need to do an open_to_lock_owner? */
6037 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
6038 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
6039 goto out_release_lock_seqid;
6041 nfs4_stateid_copy(&data->arg.open_stateid,
6042 &state->open_stateid);
6043 data->arg.new_lock_owner = 1;
6044 data->res.open_seqid = data->arg.open_seqid;
6046 data->arg.new_lock_owner = 0;
6047 nfs4_stateid_copy(&data->arg.lock_stateid,
6048 &data->lsp->ls_stateid);
6050 if (!nfs4_valid_open_stateid(state)) {
6051 data->rpc_status = -EBADF;
6052 task->tk_action = NULL;
6053 goto out_release_open_seqid;
6055 data->timestamp = jiffies;
6056 if (nfs4_setup_sequence(data->server->nfs_client,
6057 &data->arg.seq_args,
6061 out_release_open_seqid:
6062 nfs_release_seqid(data->arg.open_seqid);
6063 out_release_lock_seqid:
6064 nfs_release_seqid(data->arg.lock_seqid);
6066 nfs4_sequence_done(task, &data->res.seq_res);
6067 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
6070 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
6072 struct nfs4_lockdata *data = calldata;
6073 struct nfs4_lock_state *lsp = data->lsp;
6075 dprintk("%s: begin!\n", __func__);
6077 if (!nfs4_sequence_done(task, &data->res.seq_res))
6080 data->rpc_status = task->tk_status;
6081 switch (task->tk_status) {
6083 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
6085 if (data->arg.new_lock) {
6086 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
6087 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) {
6088 rpc_restart_call_prepare(task);
6092 if (data->arg.new_lock_owner != 0) {
6093 nfs_confirm_seqid(&lsp->ls_seqid, 0);
6094 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
6095 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
6096 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
6097 rpc_restart_call_prepare(task);
6099 case -NFS4ERR_BAD_STATEID:
6100 case -NFS4ERR_OLD_STATEID:
6101 case -NFS4ERR_STALE_STATEID:
6102 case -NFS4ERR_EXPIRED:
6103 if (data->arg.new_lock_owner != 0) {
6104 if (!nfs4_stateid_match(&data->arg.open_stateid,
6105 &lsp->ls_state->open_stateid))
6106 rpc_restart_call_prepare(task);
6107 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
6109 rpc_restart_call_prepare(task);
6111 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
6114 static void nfs4_lock_release(void *calldata)
6116 struct nfs4_lockdata *data = calldata;
6118 dprintk("%s: begin!\n", __func__);
6119 nfs_free_seqid(data->arg.open_seqid);
6120 if (data->cancelled != 0) {
6121 struct rpc_task *task;
6122 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
6123 data->arg.lock_seqid);
6125 rpc_put_task_async(task);
6126 dprintk("%s: cancelling lock!\n", __func__);
6128 nfs_free_seqid(data->arg.lock_seqid);
6129 nfs4_put_lock_state(data->lsp);
6130 put_nfs_open_context(data->ctx);
6132 dprintk("%s: done!\n", __func__);
6135 static const struct rpc_call_ops nfs4_lock_ops = {
6136 .rpc_call_prepare = nfs4_lock_prepare,
6137 .rpc_call_done = nfs4_lock_done,
6138 .rpc_release = nfs4_lock_release,
6141 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
6144 case -NFS4ERR_ADMIN_REVOKED:
6145 case -NFS4ERR_EXPIRED:
6146 case -NFS4ERR_BAD_STATEID:
6147 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
6148 if (new_lock_owner != 0 ||
6149 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
6150 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
6152 case -NFS4ERR_STALE_STATEID:
6153 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
6154 nfs4_schedule_lease_recovery(server->nfs_client);
6158 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
6160 struct nfs4_lockdata *data;
6161 struct rpc_task *task;
6162 struct rpc_message msg = {
6163 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
6164 .rpc_cred = state->owner->so_cred,
6166 struct rpc_task_setup task_setup_data = {
6167 .rpc_client = NFS_CLIENT(state->inode),
6168 .rpc_message = &msg,
6169 .callback_ops = &nfs4_lock_ops,
6170 .workqueue = nfsiod_workqueue,
6171 .flags = RPC_TASK_ASYNC,
6175 dprintk("%s: begin!\n", __func__);
6176 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
6177 fl->fl_u.nfs4_fl.owner,
6178 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
6182 data->arg.block = 1;
6183 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
6184 msg.rpc_argp = &data->arg;
6185 msg.rpc_resp = &data->res;
6186 task_setup_data.callback_data = data;
6187 if (recovery_type > NFS_LOCK_NEW) {
6188 if (recovery_type == NFS_LOCK_RECLAIM)
6189 data->arg.reclaim = NFS_LOCK_RECLAIM;
6190 nfs4_set_sequence_privileged(&data->arg.seq_args);
6192 data->arg.new_lock = 1;
6193 task = rpc_run_task(&task_setup_data);
6195 return PTR_ERR(task);
6196 ret = rpc_wait_for_completion_task(task);
6198 ret = data->rpc_status;
6200 nfs4_handle_setlk_error(data->server, data->lsp,
6201 data->arg.new_lock_owner, ret);
6203 data->cancelled = 1;
6205 dprintk("%s: done, ret = %d!\n", __func__, ret);
6206 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
6210 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
6212 struct nfs_server *server = NFS_SERVER(state->inode);
6213 struct nfs4_exception exception = {
6214 .inode = state->inode,
6219 /* Cache the lock if possible... */
6220 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6222 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
6223 if (err != -NFS4ERR_DELAY)
6225 nfs4_handle_exception(server, err, &exception);
6226 } while (exception.retry);
6230 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
6232 struct nfs_server *server = NFS_SERVER(state->inode);
6233 struct nfs4_exception exception = {
6234 .inode = state->inode,
6238 err = nfs4_set_lock_state(state, request);
6241 if (!recover_lost_locks) {
6242 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
6246 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6248 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
6252 case -NFS4ERR_GRACE:
6253 case -NFS4ERR_DELAY:
6254 nfs4_handle_exception(server, err, &exception);
6257 } while (exception.retry);
6262 #if defined(CONFIG_NFS_V4_1)
6263 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6265 struct nfs4_lock_state *lsp;
6268 status = nfs4_set_lock_state(state, request);
6271 lsp = request->fl_u.nfs4_fl.owner;
6272 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) ||
6273 test_bit(NFS_LOCK_LOST, &lsp->ls_flags))
6275 return nfs4_lock_expired(state, request);
6279 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6281 struct nfs_inode *nfsi = NFS_I(state->inode);
6282 struct nfs4_state_owner *sp = state->owner;
6283 unsigned char fl_flags = request->fl_flags;
6286 request->fl_flags |= FL_ACCESS;
6287 status = locks_lock_inode_wait(state->inode, request);
6290 mutex_lock(&sp->so_delegreturn_mutex);
6291 down_read(&nfsi->rwsem);
6292 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
6293 /* Yes: cache locks! */
6294 /* ...but avoid races with delegation recall... */
6295 request->fl_flags = fl_flags & ~FL_SLEEP;
6296 status = locks_lock_inode_wait(state->inode, request);
6297 up_read(&nfsi->rwsem);
6298 mutex_unlock(&sp->so_delegreturn_mutex);
6301 up_read(&nfsi->rwsem);
6302 mutex_unlock(&sp->so_delegreturn_mutex);
6303 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6305 request->fl_flags = fl_flags;
6309 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6311 struct nfs4_exception exception = {
6313 .inode = state->inode,
6318 err = _nfs4_proc_setlk(state, cmd, request);
6319 if (err == -NFS4ERR_DENIED)
6321 err = nfs4_handle_exception(NFS_SERVER(state->inode),
6323 } while (exception.retry);
6327 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
6328 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
6331 nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd,
6332 struct file_lock *request)
6334 int status = -ERESTARTSYS;
6335 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6337 while(!signalled()) {
6338 status = nfs4_proc_setlk(state, cmd, request);
6339 if ((status != -EAGAIN) || IS_SETLK(cmd))
6341 freezable_schedule_timeout_interruptible(timeout);
6343 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout);
6344 status = -ERESTARTSYS;
6349 #ifdef CONFIG_NFS_V4_1
6350 struct nfs4_lock_waiter {
6351 struct task_struct *task;
6352 struct inode *inode;
6353 struct nfs_lowner *owner;
6358 nfs4_wake_lock_waiter(wait_queue_t *wait, unsigned int mode, int flags, void *key)
6361 struct cb_notify_lock_args *cbnl = key;
6362 struct nfs4_lock_waiter *waiter = wait->private;
6363 struct nfs_lowner *lowner = &cbnl->cbnl_owner,
6364 *wowner = waiter->owner;
6366 /* Only wake if the callback was for the same owner */
6367 if (lowner->clientid != wowner->clientid ||
6368 lowner->id != wowner->id ||
6369 lowner->s_dev != wowner->s_dev)
6372 /* Make sure it's for the right inode */
6373 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh))
6376 waiter->notified = true;
6378 /* override "private" so we can use default_wake_function */
6379 wait->private = waiter->task;
6380 ret = autoremove_wake_function(wait, mode, flags, key);
6381 wait->private = waiter;
6386 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6388 int status = -ERESTARTSYS;
6389 unsigned long flags;
6390 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner;
6391 struct nfs_server *server = NFS_SERVER(state->inode);
6392 struct nfs_client *clp = server->nfs_client;
6393 wait_queue_head_t *q = &clp->cl_lock_waitq;
6394 struct nfs_lowner owner = { .clientid = clp->cl_clientid,
6395 .id = lsp->ls_seqid.owner_id,
6396 .s_dev = server->s_dev };
6397 struct nfs4_lock_waiter waiter = { .task = current,
6398 .inode = state->inode,
6400 .notified = false };
6403 /* Don't bother with waitqueue if we don't expect a callback */
6404 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags))
6405 return nfs4_retry_setlk_simple(state, cmd, request);
6408 wait.private = &waiter;
6409 wait.func = nfs4_wake_lock_waiter;
6410 add_wait_queue(q, &wait);
6412 while(!signalled()) {
6413 status = nfs4_proc_setlk(state, cmd, request);
6414 if ((status != -EAGAIN) || IS_SETLK(cmd))
6417 status = -ERESTARTSYS;
6418 spin_lock_irqsave(&q->lock, flags);
6419 if (waiter.notified) {
6420 spin_unlock_irqrestore(&q->lock, flags);
6423 set_current_state(TASK_INTERRUPTIBLE);
6424 spin_unlock_irqrestore(&q->lock, flags);
6426 freezable_schedule_timeout_interruptible(NFS4_LOCK_MAXTIMEOUT);
6429 finish_wait(q, &wait);
6432 #else /* !CONFIG_NFS_V4_1 */
6434 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6436 return nfs4_retry_setlk_simple(state, cmd, request);
6441 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6443 struct nfs_open_context *ctx;
6444 struct nfs4_state *state;
6447 /* verify open state */
6448 ctx = nfs_file_open_context(filp);
6451 if (request->fl_start < 0 || request->fl_end < 0)
6454 if (IS_GETLK(cmd)) {
6456 return nfs4_proc_getlk(state, F_GETLK, request);
6460 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6463 if (request->fl_type == F_UNLCK) {
6465 return nfs4_proc_unlck(state, cmd, request);
6472 if ((request->fl_flags & FL_POSIX) &&
6473 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6477 * Don't rely on the VFS having checked the file open mode,
6478 * since it won't do this for flock() locks.
6480 switch (request->fl_type) {
6482 if (!(filp->f_mode & FMODE_READ))
6486 if (!(filp->f_mode & FMODE_WRITE))
6490 status = nfs4_set_lock_state(state, request);
6494 return nfs4_retry_setlk(state, cmd, request);
6497 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
6499 struct nfs_server *server = NFS_SERVER(state->inode);
6502 err = nfs4_set_lock_state(state, fl);
6505 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
6506 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
6509 struct nfs_release_lockowner_data {
6510 struct nfs4_lock_state *lsp;
6511 struct nfs_server *server;
6512 struct nfs_release_lockowner_args args;
6513 struct nfs_release_lockowner_res res;
6514 unsigned long timestamp;
6517 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6519 struct nfs_release_lockowner_data *data = calldata;
6520 struct nfs_server *server = data->server;
6521 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
6522 &data->res.seq_res, task);
6523 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6524 data->timestamp = jiffies;
6527 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6529 struct nfs_release_lockowner_data *data = calldata;
6530 struct nfs_server *server = data->server;
6532 nfs40_sequence_done(task, &data->res.seq_res);
6534 switch (task->tk_status) {
6536 renew_lease(server, data->timestamp);
6538 case -NFS4ERR_STALE_CLIENTID:
6539 case -NFS4ERR_EXPIRED:
6540 nfs4_schedule_lease_recovery(server->nfs_client);
6542 case -NFS4ERR_LEASE_MOVED:
6543 case -NFS4ERR_DELAY:
6544 if (nfs4_async_handle_error(task, server,
6545 NULL, NULL) == -EAGAIN)
6546 rpc_restart_call_prepare(task);
6550 static void nfs4_release_lockowner_release(void *calldata)
6552 struct nfs_release_lockowner_data *data = calldata;
6553 nfs4_free_lock_state(data->server, data->lsp);
6557 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
6558 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6559 .rpc_call_done = nfs4_release_lockowner_done,
6560 .rpc_release = nfs4_release_lockowner_release,
6564 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
6566 struct nfs_release_lockowner_data *data;
6567 struct rpc_message msg = {
6568 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6571 if (server->nfs_client->cl_mvops->minor_version != 0)
6574 data = kmalloc(sizeof(*data), GFP_NOFS);
6578 data->server = server;
6579 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6580 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6581 data->args.lock_owner.s_dev = server->s_dev;
6583 msg.rpc_argp = &data->args;
6584 msg.rpc_resp = &data->res;
6585 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
6586 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
6589 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6591 static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
6592 struct dentry *unused, struct inode *inode,
6593 const char *key, const void *buf,
6594 size_t buflen, int flags)
6596 return nfs4_proc_set_acl(inode, buf, buflen);
6599 static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
6600 struct dentry *unused, struct inode *inode,
6601 const char *key, void *buf, size_t buflen)
6603 return nfs4_proc_get_acl(inode, buf, buflen);
6606 static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
6608 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
6611 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
6613 static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
6614 struct dentry *unused, struct inode *inode,
6615 const char *key, const void *buf,
6616 size_t buflen, int flags)
6618 if (security_ismaclabel(key))
6619 return nfs4_set_security_label(inode, buf, buflen);
6624 static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
6625 struct dentry *unused, struct inode *inode,
6626 const char *key, void *buf, size_t buflen)
6628 if (security_ismaclabel(key))
6629 return nfs4_get_security_label(inode, buf, buflen);
6634 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6638 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
6639 len = security_inode_listsecurity(inode, list, list_len);
6640 if (list_len && len > list_len)
6646 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6647 .prefix = XATTR_SECURITY_PREFIX,
6648 .get = nfs4_xattr_get_nfs4_label,
6649 .set = nfs4_xattr_set_nfs4_label,
6655 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6663 * nfs_fhget will use either the mounted_on_fileid or the fileid
6665 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6667 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6668 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6669 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
6670 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
6673 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
6674 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
6675 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6679 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6680 const struct qstr *name,
6681 struct nfs4_fs_locations *fs_locations,
6684 struct nfs_server *server = NFS_SERVER(dir);
6686 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6688 struct nfs4_fs_locations_arg args = {
6689 .dir_fh = NFS_FH(dir),
6694 struct nfs4_fs_locations_res res = {
6695 .fs_locations = fs_locations,
6697 struct rpc_message msg = {
6698 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6704 dprintk("%s: start\n", __func__);
6706 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6707 * is not supported */
6708 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6709 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6711 bitmask[0] |= FATTR4_WORD0_FILEID;
6713 nfs_fattr_init(&fs_locations->fattr);
6714 fs_locations->server = server;
6715 fs_locations->nlocations = 0;
6716 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
6717 dprintk("%s: returned status = %d\n", __func__, status);
6721 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6722 const struct qstr *name,
6723 struct nfs4_fs_locations *fs_locations,
6726 struct nfs4_exception exception = { };
6729 err = _nfs4_proc_fs_locations(client, dir, name,
6730 fs_locations, page);
6731 trace_nfs4_get_fs_locations(dir, name, err);
6732 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6734 } while (exception.retry);
6739 * This operation also signals the server that this client is
6740 * performing migration recovery. The server can stop returning
6741 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6742 * appended to this compound to identify the client ID which is
6743 * performing recovery.
6745 static int _nfs40_proc_get_locations(struct inode *inode,
6746 struct nfs4_fs_locations *locations,
6747 struct page *page, struct rpc_cred *cred)
6749 struct nfs_server *server = NFS_SERVER(inode);
6750 struct rpc_clnt *clnt = server->client;
6752 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6754 struct nfs4_fs_locations_arg args = {
6755 .clientid = server->nfs_client->cl_clientid,
6756 .fh = NFS_FH(inode),
6759 .migration = 1, /* skip LOOKUP */
6760 .renew = 1, /* append RENEW */
6762 struct nfs4_fs_locations_res res = {
6763 .fs_locations = locations,
6767 struct rpc_message msg = {
6768 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6773 unsigned long now = jiffies;
6776 nfs_fattr_init(&locations->fattr);
6777 locations->server = server;
6778 locations->nlocations = 0;
6780 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6781 nfs4_set_sequence_privileged(&args.seq_args);
6782 status = nfs4_call_sync_sequence(clnt, server, &msg,
6783 &args.seq_args, &res.seq_res);
6787 renew_lease(server, now);
6791 #ifdef CONFIG_NFS_V4_1
6794 * This operation also signals the server that this client is
6795 * performing migration recovery. The server can stop asserting
6796 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6797 * performing this operation is identified in the SEQUENCE
6798 * operation in this compound.
6800 * When the client supports GETATTR(fs_locations_info), it can
6801 * be plumbed in here.
6803 static int _nfs41_proc_get_locations(struct inode *inode,
6804 struct nfs4_fs_locations *locations,
6805 struct page *page, struct rpc_cred *cred)
6807 struct nfs_server *server = NFS_SERVER(inode);
6808 struct rpc_clnt *clnt = server->client;
6810 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6812 struct nfs4_fs_locations_arg args = {
6813 .fh = NFS_FH(inode),
6816 .migration = 1, /* skip LOOKUP */
6818 struct nfs4_fs_locations_res res = {
6819 .fs_locations = locations,
6822 struct rpc_message msg = {
6823 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6830 nfs_fattr_init(&locations->fattr);
6831 locations->server = server;
6832 locations->nlocations = 0;
6834 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6835 nfs4_set_sequence_privileged(&args.seq_args);
6836 status = nfs4_call_sync_sequence(clnt, server, &msg,
6837 &args.seq_args, &res.seq_res);
6838 if (status == NFS4_OK &&
6839 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6840 status = -NFS4ERR_LEASE_MOVED;
6844 #endif /* CONFIG_NFS_V4_1 */
6847 * nfs4_proc_get_locations - discover locations for a migrated FSID
6848 * @inode: inode on FSID that is migrating
6849 * @locations: result of query
6851 * @cred: credential to use for this operation
6853 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6854 * operation failed, or a negative errno if a local error occurred.
6856 * On success, "locations" is filled in, but if the server has
6857 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6860 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6861 * from this client that require migration recovery.
6863 int nfs4_proc_get_locations(struct inode *inode,
6864 struct nfs4_fs_locations *locations,
6865 struct page *page, struct rpc_cred *cred)
6867 struct nfs_server *server = NFS_SERVER(inode);
6868 struct nfs_client *clp = server->nfs_client;
6869 const struct nfs4_mig_recovery_ops *ops =
6870 clp->cl_mvops->mig_recovery_ops;
6871 struct nfs4_exception exception = { };
6874 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6875 (unsigned long long)server->fsid.major,
6876 (unsigned long long)server->fsid.minor,
6878 nfs_display_fhandle(NFS_FH(inode), __func__);
6881 status = ops->get_locations(inode, locations, page, cred);
6882 if (status != -NFS4ERR_DELAY)
6884 nfs4_handle_exception(server, status, &exception);
6885 } while (exception.retry);
6890 * This operation also signals the server that this client is
6891 * performing "lease moved" recovery. The server can stop
6892 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6893 * is appended to this compound to identify the client ID which is
6894 * performing recovery.
6896 static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6898 struct nfs_server *server = NFS_SERVER(inode);
6899 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6900 struct rpc_clnt *clnt = server->client;
6901 struct nfs4_fsid_present_arg args = {
6902 .fh = NFS_FH(inode),
6903 .clientid = clp->cl_clientid,
6904 .renew = 1, /* append RENEW */
6906 struct nfs4_fsid_present_res res = {
6909 struct rpc_message msg = {
6910 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6915 unsigned long now = jiffies;
6918 res.fh = nfs_alloc_fhandle();
6922 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6923 nfs4_set_sequence_privileged(&args.seq_args);
6924 status = nfs4_call_sync_sequence(clnt, server, &msg,
6925 &args.seq_args, &res.seq_res);
6926 nfs_free_fhandle(res.fh);
6930 do_renew_lease(clp, now);
6934 #ifdef CONFIG_NFS_V4_1
6937 * This operation also signals the server that this client is
6938 * performing "lease moved" recovery. The server can stop asserting
6939 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6940 * this operation is identified in the SEQUENCE operation in this
6943 static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6945 struct nfs_server *server = NFS_SERVER(inode);
6946 struct rpc_clnt *clnt = server->client;
6947 struct nfs4_fsid_present_arg args = {
6948 .fh = NFS_FH(inode),
6950 struct nfs4_fsid_present_res res = {
6952 struct rpc_message msg = {
6953 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6960 res.fh = nfs_alloc_fhandle();
6964 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6965 nfs4_set_sequence_privileged(&args.seq_args);
6966 status = nfs4_call_sync_sequence(clnt, server, &msg,
6967 &args.seq_args, &res.seq_res);
6968 nfs_free_fhandle(res.fh);
6969 if (status == NFS4_OK &&
6970 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6971 status = -NFS4ERR_LEASE_MOVED;
6975 #endif /* CONFIG_NFS_V4_1 */
6978 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6979 * @inode: inode on FSID to check
6980 * @cred: credential to use for this operation
6982 * Server indicates whether the FSID is present, moved, or not
6983 * recognized. This operation is necessary to clear a LEASE_MOVED
6984 * condition for this client ID.
6986 * Returns NFS4_OK if the FSID is present on this server,
6987 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6988 * NFS4ERR code if some error occurred on the server, or a
6989 * negative errno if a local failure occurred.
6991 int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6993 struct nfs_server *server = NFS_SERVER(inode);
6994 struct nfs_client *clp = server->nfs_client;
6995 const struct nfs4_mig_recovery_ops *ops =
6996 clp->cl_mvops->mig_recovery_ops;
6997 struct nfs4_exception exception = { };
7000 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
7001 (unsigned long long)server->fsid.major,
7002 (unsigned long long)server->fsid.minor,
7004 nfs_display_fhandle(NFS_FH(inode), __func__);
7007 status = ops->fsid_present(inode, cred);
7008 if (status != -NFS4ERR_DELAY)
7010 nfs4_handle_exception(server, status, &exception);
7011 } while (exception.retry);
7016 * If 'use_integrity' is true and the state managment nfs_client
7017 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
7018 * and the machine credential as per RFC3530bis and RFC5661 Security
7019 * Considerations sections. Otherwise, just use the user cred with the
7020 * filesystem's rpc_client.
7022 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
7025 struct nfs4_secinfo_arg args = {
7026 .dir_fh = NFS_FH(dir),
7029 struct nfs4_secinfo_res res = {
7032 struct rpc_message msg = {
7033 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
7037 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7038 struct rpc_cred *cred = NULL;
7040 if (use_integrity) {
7041 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7042 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
7043 msg.rpc_cred = cred;
7046 dprintk("NFS call secinfo %s\n", name->name);
7048 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
7049 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
7051 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
7053 dprintk("NFS reply secinfo: %d\n", status);
7061 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
7062 struct nfs4_secinfo_flavors *flavors)
7064 struct nfs4_exception exception = { };
7067 err = -NFS4ERR_WRONGSEC;
7069 /* try to use integrity protection with machine cred */
7070 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
7071 err = _nfs4_proc_secinfo(dir, name, flavors, true);
7074 * if unable to use integrity protection, or SECINFO with
7075 * integrity protection returns NFS4ERR_WRONGSEC (which is
7076 * disallowed by spec, but exists in deployed servers) use
7077 * the current filesystem's rpc_client and the user cred.
7079 if (err == -NFS4ERR_WRONGSEC)
7080 err = _nfs4_proc_secinfo(dir, name, flavors, false);
7082 trace_nfs4_secinfo(dir, name, err);
7083 err = nfs4_handle_exception(NFS_SERVER(dir), err,
7085 } while (exception.retry);
7089 #ifdef CONFIG_NFS_V4_1
7091 * Check the exchange flags returned by the server for invalid flags, having
7092 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
7095 static int nfs4_check_cl_exchange_flags(u32 flags)
7097 if (flags & ~EXCHGID4_FLAG_MASK_R)
7099 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
7100 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
7102 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
7106 return -NFS4ERR_INVAL;
7110 nfs41_same_server_scope(struct nfs41_server_scope *a,
7111 struct nfs41_server_scope *b)
7113 if (a->server_scope_sz != b->server_scope_sz)
7115 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0;
7119 nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
7123 static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
7124 .rpc_call_done = &nfs4_bind_one_conn_to_session_done,
7128 * nfs4_proc_bind_one_conn_to_session()
7130 * The 4.1 client currently uses the same TCP connection for the
7131 * fore and backchannel.
7134 int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
7135 struct rpc_xprt *xprt,
7136 struct nfs_client *clp,
7137 struct rpc_cred *cred)
7140 struct nfs41_bind_conn_to_session_args args = {
7142 .dir = NFS4_CDFC4_FORE_OR_BOTH,
7144 struct nfs41_bind_conn_to_session_res res;
7145 struct rpc_message msg = {
7147 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
7152 struct rpc_task_setup task_setup_data = {
7155 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
7156 .rpc_message = &msg,
7157 .flags = RPC_TASK_TIMEOUT,
7159 struct rpc_task *task;
7161 dprintk("--> %s\n", __func__);
7163 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
7164 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
7165 args.dir = NFS4_CDFC4_FORE;
7167 /* Do not set the backchannel flag unless this is clnt->cl_xprt */
7168 if (xprt != rcu_access_pointer(clnt->cl_xprt))
7169 args.dir = NFS4_CDFC4_FORE;
7171 task = rpc_run_task(&task_setup_data);
7172 if (!IS_ERR(task)) {
7173 status = task->tk_status;
7176 status = PTR_ERR(task);
7177 trace_nfs4_bind_conn_to_session(clp, status);
7179 if (memcmp(res.sessionid.data,
7180 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
7181 dprintk("NFS: %s: Session ID mismatch\n", __func__);
7185 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7186 dprintk("NFS: %s: Unexpected direction from server\n",
7191 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7192 dprintk("NFS: %s: Server returned RDMA mode = true\n",
7199 dprintk("<-- %s status= %d\n", __func__, status);
7203 struct rpc_bind_conn_calldata {
7204 struct nfs_client *clp;
7205 struct rpc_cred *cred;
7209 nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
7210 struct rpc_xprt *xprt,
7213 struct rpc_bind_conn_calldata *p = calldata;
7215 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
7218 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7220 struct rpc_bind_conn_calldata data = {
7224 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
7225 nfs4_proc_bind_conn_to_session_callback, &data);
7229 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
7230 * and operations we'd like to see to enable certain features in the allow map
7232 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
7233 .how = SP4_MACH_CRED,
7234 .enforce.u.words = {
7235 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7236 1 << (OP_EXCHANGE_ID - 32) |
7237 1 << (OP_CREATE_SESSION - 32) |
7238 1 << (OP_DESTROY_SESSION - 32) |
7239 1 << (OP_DESTROY_CLIENTID - 32)
7242 [0] = 1 << (OP_CLOSE) |
7243 1 << (OP_OPEN_DOWNGRADE) |
7245 1 << (OP_DELEGRETURN) |
7247 [1] = 1 << (OP_SECINFO - 32) |
7248 1 << (OP_SECINFO_NO_NAME - 32) |
7249 1 << (OP_LAYOUTRETURN - 32) |
7250 1 << (OP_TEST_STATEID - 32) |
7251 1 << (OP_FREE_STATEID - 32) |
7252 1 << (OP_WRITE - 32)
7257 * Select the state protection mode for client `clp' given the server results
7258 * from exchange_id in `sp'.
7260 * Returns 0 on success, negative errno otherwise.
7262 static int nfs4_sp4_select_mode(struct nfs_client *clp,
7263 struct nfs41_state_protection *sp)
7265 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
7266 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7267 1 << (OP_EXCHANGE_ID - 32) |
7268 1 << (OP_CREATE_SESSION - 32) |
7269 1 << (OP_DESTROY_SESSION - 32) |
7270 1 << (OP_DESTROY_CLIENTID - 32)
7274 if (sp->how == SP4_MACH_CRED) {
7275 /* Print state protect result */
7276 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
7277 for (i = 0; i <= LAST_NFS4_OP; i++) {
7278 if (test_bit(i, sp->enforce.u.longs))
7279 dfprintk(MOUNT, " enforce op %d\n", i);
7280 if (test_bit(i, sp->allow.u.longs))
7281 dfprintk(MOUNT, " allow op %d\n", i);
7284 /* make sure nothing is on enforce list that isn't supported */
7285 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
7286 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
7287 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7293 * Minimal mode - state operations are allowed to use machine
7294 * credential. Note this already happens by default, so the
7295 * client doesn't have to do anything more than the negotiation.
7297 * NOTE: we don't care if EXCHANGE_ID is in the list -
7298 * we're already using the machine cred for exchange_id
7299 * and will never use a different cred.
7301 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
7302 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
7303 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
7304 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
7305 dfprintk(MOUNT, "sp4_mach_cred:\n");
7306 dfprintk(MOUNT, " minimal mode enabled\n");
7307 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
7309 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7313 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
7314 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
7315 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
7316 test_bit(OP_LOCKU, sp->allow.u.longs)) {
7317 dfprintk(MOUNT, " cleanup mode enabled\n");
7318 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
7321 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
7322 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
7323 set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP,
7324 &clp->cl_sp4_flags);
7327 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
7328 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
7329 dfprintk(MOUNT, " secinfo mode enabled\n");
7330 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
7333 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
7334 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
7335 dfprintk(MOUNT, " stateid mode enabled\n");
7336 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
7339 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
7340 dfprintk(MOUNT, " write mode enabled\n");
7341 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
7344 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
7345 dfprintk(MOUNT, " commit mode enabled\n");
7346 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
7353 struct nfs41_exchange_id_data {
7354 struct nfs41_exchange_id_res res;
7355 struct nfs41_exchange_id_args args;
7356 struct rpc_xprt *xprt;
7360 static void nfs4_exchange_id_done(struct rpc_task *task, void *data)
7362 struct nfs41_exchange_id_data *cdata =
7363 (struct nfs41_exchange_id_data *)data;
7364 struct nfs_client *clp = cdata->args.client;
7365 int status = task->tk_status;
7367 trace_nfs4_exchange_id(clp, status);
7370 status = nfs4_check_cl_exchange_flags(cdata->res.flags);
7372 if (cdata->xprt && status == 0) {
7373 status = nfs4_detect_session_trunking(clp, &cdata->res,
7379 status = nfs4_sp4_select_mode(clp, &cdata->res.state_protect);
7382 clp->cl_clientid = cdata->res.clientid;
7383 clp->cl_exchange_flags = cdata->res.flags;
7384 /* Client ID is not confirmed */
7385 if (!(cdata->res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
7386 clear_bit(NFS4_SESSION_ESTABLISHED,
7387 &clp->cl_session->session_state);
7388 clp->cl_seqid = cdata->res.seqid;
7391 kfree(clp->cl_serverowner);
7392 clp->cl_serverowner = cdata->res.server_owner;
7393 cdata->res.server_owner = NULL;
7395 /* use the most recent implementation id */
7396 kfree(clp->cl_implid);
7397 clp->cl_implid = cdata->res.impl_id;
7398 cdata->res.impl_id = NULL;
7400 if (clp->cl_serverscope != NULL &&
7401 !nfs41_same_server_scope(clp->cl_serverscope,
7402 cdata->res.server_scope)) {
7403 dprintk("%s: server_scope mismatch detected\n",
7405 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
7406 kfree(clp->cl_serverscope);
7407 clp->cl_serverscope = NULL;
7410 if (clp->cl_serverscope == NULL) {
7411 clp->cl_serverscope = cdata->res.server_scope;
7412 cdata->res.server_scope = NULL;
7414 /* Save the EXCHANGE_ID verifier session trunk tests */
7415 memcpy(clp->cl_confirm.data, cdata->args.verifier->data,
7416 sizeof(clp->cl_confirm.data));
7419 cdata->rpc_status = status;
7423 static void nfs4_exchange_id_release(void *data)
7425 struct nfs41_exchange_id_data *cdata =
7426 (struct nfs41_exchange_id_data *)data;
7429 xprt_put(cdata->xprt);
7430 rpc_clnt_xprt_switch_put(cdata->args.client->cl_rpcclient);
7432 nfs_put_client(cdata->args.client);
7433 kfree(cdata->res.impl_id);
7434 kfree(cdata->res.server_scope);
7435 kfree(cdata->res.server_owner);
7439 static const struct rpc_call_ops nfs4_exchange_id_call_ops = {
7440 .rpc_call_done = nfs4_exchange_id_done,
7441 .rpc_release = nfs4_exchange_id_release,
7445 * _nfs4_proc_exchange_id()
7447 * Wrapper for EXCHANGE_ID operation.
7449 static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
7450 u32 sp4_how, struct rpc_xprt *xprt)
7452 nfs4_verifier verifier;
7453 struct rpc_message msg = {
7454 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
7457 struct rpc_task_setup task_setup_data = {
7458 .rpc_client = clp->cl_rpcclient,
7459 .callback_ops = &nfs4_exchange_id_call_ops,
7460 .rpc_message = &msg,
7461 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
7463 struct nfs41_exchange_id_data *calldata;
7464 struct rpc_task *task;
7467 if (!atomic_inc_not_zero(&clp->cl_count))
7471 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7476 nfs4_init_boot_verifier(clp, &verifier);
7478 status = nfs4_init_uniform_client_string(clp);
7482 dprintk("NFS call exchange_id auth=%s, '%s'\n",
7483 clp->cl_rpcclient->cl_auth->au_ops->au_name,
7486 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
7489 if (unlikely(calldata->res.server_owner == NULL))
7492 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
7494 if (unlikely(calldata->res.server_scope == NULL))
7495 goto out_server_owner;
7497 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
7498 if (unlikely(calldata->res.impl_id == NULL))
7499 goto out_server_scope;
7503 calldata->args.state_protect.how = SP4_NONE;
7507 calldata->args.state_protect = nfs4_sp4_mach_cred_request;
7517 calldata->xprt = xprt;
7518 task_setup_data.rpc_xprt = xprt;
7519 task_setup_data.flags =
7520 RPC_TASK_SOFT|RPC_TASK_SOFTCONN|RPC_TASK_ASYNC;
7521 calldata->args.verifier = &clp->cl_confirm;
7523 calldata->args.verifier = &verifier;
7525 calldata->args.client = clp;
7526 #ifdef CONFIG_NFS_V4_1_MIGRATION
7527 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7528 EXCHGID4_FLAG_BIND_PRINC_STATEID |
7529 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
7531 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7532 EXCHGID4_FLAG_BIND_PRINC_STATEID,
7534 msg.rpc_argp = &calldata->args;
7535 msg.rpc_resp = &calldata->res;
7536 task_setup_data.callback_data = calldata;
7538 task = rpc_run_task(&task_setup_data);
7540 return PTR_ERR(task);
7543 status = rpc_wait_for_completion_task(task);
7545 status = calldata->rpc_status;
7546 } else /* session trunking test */
7547 status = calldata->rpc_status;
7551 if (clp->cl_implid != NULL)
7552 dprintk("NFS reply exchange_id: Server Implementation ID: "
7553 "domain: %s, name: %s, date: %llu,%u\n",
7554 clp->cl_implid->domain, clp->cl_implid->name,
7555 clp->cl_implid->date.seconds,
7556 clp->cl_implid->date.nseconds);
7557 dprintk("NFS reply exchange_id: %d\n", status);
7561 kfree(calldata->res.impl_id);
7563 kfree(calldata->res.server_scope);
7565 kfree(calldata->res.server_owner);
7568 nfs_put_client(clp);
7573 * nfs4_proc_exchange_id()
7575 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7577 * Since the clientid has expired, all compounds using sessions
7578 * associated with the stale clientid will be returning
7579 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7580 * be in some phase of session reset.
7582 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7584 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7586 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7589 /* try SP4_MACH_CRED if krb5i/p */
7590 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7591 authflavor == RPC_AUTH_GSS_KRB5P) {
7592 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED, NULL);
7598 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE, NULL);
7602 * nfs4_test_session_trunk
7604 * This is an add_xprt_test() test function called from
7605 * rpc_clnt_setup_test_and_add_xprt.
7607 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt
7608 * and is dereferrenced in nfs4_exchange_id_release
7610 * Upon success, add the new transport to the rpc_clnt
7612 * @clnt: struct rpc_clnt to get new transport
7613 * @xprt: the rpc_xprt to test
7614 * @data: call data for _nfs4_proc_exchange_id.
7616 int nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt,
7619 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data;
7622 dprintk("--> %s try %s\n", __func__,
7623 xprt->address_strings[RPC_DISPLAY_ADDR]);
7625 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED);
7627 /* Test connection for session trunking. Async exchange_id call */
7628 return _nfs4_proc_exchange_id(adata->clp, adata->cred, sp4_how, xprt);
7630 EXPORT_SYMBOL_GPL(nfs4_test_session_trunk);
7632 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7633 struct rpc_cred *cred)
7635 struct rpc_message msg = {
7636 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7642 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7643 trace_nfs4_destroy_clientid(clp, status);
7645 dprintk("NFS: Got error %d from the server %s on "
7646 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7650 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7651 struct rpc_cred *cred)
7656 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7657 ret = _nfs4_proc_destroy_clientid(clp, cred);
7659 case -NFS4ERR_DELAY:
7660 case -NFS4ERR_CLIENTID_BUSY:
7670 int nfs4_destroy_clientid(struct nfs_client *clp)
7672 struct rpc_cred *cred;
7675 if (clp->cl_mvops->minor_version < 1)
7677 if (clp->cl_exchange_flags == 0)
7679 if (clp->cl_preserve_clid)
7681 cred = nfs4_get_clid_cred(clp);
7682 ret = nfs4_proc_destroy_clientid(clp, cred);
7687 case -NFS4ERR_STALE_CLIENTID:
7688 clp->cl_exchange_flags = 0;
7694 struct nfs4_get_lease_time_data {
7695 struct nfs4_get_lease_time_args *args;
7696 struct nfs4_get_lease_time_res *res;
7697 struct nfs_client *clp;
7700 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7703 struct nfs4_get_lease_time_data *data =
7704 (struct nfs4_get_lease_time_data *)calldata;
7706 dprintk("--> %s\n", __func__);
7707 /* just setup sequence, do not trigger session recovery
7708 since we're invoked within one */
7709 nfs4_setup_sequence(data->clp,
7710 &data->args->la_seq_args,
7711 &data->res->lr_seq_res,
7713 dprintk("<-- %s\n", __func__);
7717 * Called from nfs4_state_manager thread for session setup, so don't recover
7718 * from sequence operation or clientid errors.
7720 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7722 struct nfs4_get_lease_time_data *data =
7723 (struct nfs4_get_lease_time_data *)calldata;
7725 dprintk("--> %s\n", __func__);
7726 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7728 switch (task->tk_status) {
7729 case -NFS4ERR_DELAY:
7730 case -NFS4ERR_GRACE:
7731 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7732 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7733 task->tk_status = 0;
7735 case -NFS4ERR_RETRY_UNCACHED_REP:
7736 rpc_restart_call_prepare(task);
7739 dprintk("<-- %s\n", __func__);
7742 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
7743 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7744 .rpc_call_done = nfs4_get_lease_time_done,
7747 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7749 struct rpc_task *task;
7750 struct nfs4_get_lease_time_args args;
7751 struct nfs4_get_lease_time_res res = {
7752 .lr_fsinfo = fsinfo,
7754 struct nfs4_get_lease_time_data data = {
7759 struct rpc_message msg = {
7760 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7764 struct rpc_task_setup task_setup = {
7765 .rpc_client = clp->cl_rpcclient,
7766 .rpc_message = &msg,
7767 .callback_ops = &nfs4_get_lease_time_ops,
7768 .callback_data = &data,
7769 .flags = RPC_TASK_TIMEOUT,
7773 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
7774 nfs4_set_sequence_privileged(&args.la_seq_args);
7775 dprintk("--> %s\n", __func__);
7776 task = rpc_run_task(&task_setup);
7779 status = PTR_ERR(task);
7781 status = task->tk_status;
7784 dprintk("<-- %s return %d\n", __func__, status);
7790 * Initialize the values to be used by the client in CREATE_SESSION
7791 * If nfs4_init_session set the fore channel request and response sizes,
7794 * Set the back channel max_resp_sz_cached to zero to force the client to
7795 * always set csa_cachethis to FALSE because the current implementation
7796 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7798 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args,
7799 struct rpc_clnt *clnt)
7801 unsigned int max_rqst_sz, max_resp_sz;
7802 unsigned int max_bc_payload = rpc_max_bc_payload(clnt);
7804 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7805 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
7807 /* Fore channel attributes */
7808 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7809 args->fc_attrs.max_resp_sz = max_resp_sz;
7810 args->fc_attrs.max_ops = NFS4_MAX_OPS;
7811 args->fc_attrs.max_reqs = max_session_slots;
7813 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
7814 "max_ops=%u max_reqs=%u\n",
7816 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
7817 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
7819 /* Back channel attributes */
7820 args->bc_attrs.max_rqst_sz = max_bc_payload;
7821 args->bc_attrs.max_resp_sz = max_bc_payload;
7822 args->bc_attrs.max_resp_sz_cached = 0;
7823 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7824 args->bc_attrs.max_reqs = min_t(unsigned short, max_session_cb_slots, 1);
7826 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7827 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7829 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7830 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7831 args->bc_attrs.max_reqs);
7834 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7835 struct nfs41_create_session_res *res)
7837 struct nfs4_channel_attrs *sent = &args->fc_attrs;
7838 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
7840 if (rcvd->max_resp_sz > sent->max_resp_sz)
7843 * Our requested max_ops is the minimum we need; we're not
7844 * prepared to break up compounds into smaller pieces than that.
7845 * So, no point even trying to continue if the server won't
7848 if (rcvd->max_ops < sent->max_ops)
7850 if (rcvd->max_reqs == 0)
7852 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7853 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
7857 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7858 struct nfs41_create_session_res *res)
7860 struct nfs4_channel_attrs *sent = &args->bc_attrs;
7861 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
7863 if (!(res->flags & SESSION4_BACK_CHAN))
7865 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7867 if (rcvd->max_resp_sz < sent->max_resp_sz)
7869 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7871 if (rcvd->max_ops > sent->max_ops)
7873 if (rcvd->max_reqs > sent->max_reqs)
7879 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7880 struct nfs41_create_session_res *res)
7884 ret = nfs4_verify_fore_channel_attrs(args, res);
7887 return nfs4_verify_back_channel_attrs(args, res);
7890 static void nfs4_update_session(struct nfs4_session *session,
7891 struct nfs41_create_session_res *res)
7893 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
7894 /* Mark client id and session as being confirmed */
7895 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7896 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
7897 session->flags = res->flags;
7898 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
7899 if (res->flags & SESSION4_BACK_CHAN)
7900 memcpy(&session->bc_attrs, &res->bc_attrs,
7901 sizeof(session->bc_attrs));
7904 static int _nfs4_proc_create_session(struct nfs_client *clp,
7905 struct rpc_cred *cred)
7907 struct nfs4_session *session = clp->cl_session;
7908 struct nfs41_create_session_args args = {
7910 .clientid = clp->cl_clientid,
7911 .seqid = clp->cl_seqid,
7912 .cb_program = NFS4_CALLBACK,
7914 struct nfs41_create_session_res res;
7916 struct rpc_message msg = {
7917 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7924 nfs4_init_channel_attrs(&args, clp->cl_rpcclient);
7925 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
7927 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7928 trace_nfs4_create_session(clp, status);
7931 case -NFS4ERR_STALE_CLIENTID:
7932 case -NFS4ERR_DELAY:
7941 /* Verify the session's negotiated channel_attrs values */
7942 status = nfs4_verify_channel_attrs(&args, &res);
7943 /* Increment the clientid slot sequence id */
7946 nfs4_update_session(session, &res);
7953 * Issues a CREATE_SESSION operation to the server.
7954 * It is the responsibility of the caller to verify the session is
7955 * expired before calling this routine.
7957 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
7961 struct nfs4_session *session = clp->cl_session;
7963 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7965 status = _nfs4_proc_create_session(clp, cred);
7969 /* Init or reset the session slot tables */
7970 status = nfs4_setup_session_slot_tables(session);
7971 dprintk("slot table setup returned %d\n", status);
7975 ptr = (unsigned *)&session->sess_id.data[0];
7976 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7977 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
7979 dprintk("<-- %s\n", __func__);
7984 * Issue the over-the-wire RPC DESTROY_SESSION.
7985 * The caller must serialize access to this routine.
7987 int nfs4_proc_destroy_session(struct nfs4_session *session,
7988 struct rpc_cred *cred)
7990 struct rpc_message msg = {
7991 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7992 .rpc_argp = session,
7997 dprintk("--> nfs4_proc_destroy_session\n");
7999 /* session is still being setup */
8000 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
8003 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
8004 trace_nfs4_destroy_session(session->clp, status);
8007 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
8008 "Session has been destroyed regardless...\n", status);
8010 dprintk("<-- nfs4_proc_destroy_session\n");
8015 * Renew the cl_session lease.
8017 struct nfs4_sequence_data {
8018 struct nfs_client *clp;
8019 struct nfs4_sequence_args args;
8020 struct nfs4_sequence_res res;
8023 static void nfs41_sequence_release(void *data)
8025 struct nfs4_sequence_data *calldata = data;
8026 struct nfs_client *clp = calldata->clp;
8028 if (atomic_read(&clp->cl_count) > 1)
8029 nfs4_schedule_state_renewal(clp);
8030 nfs_put_client(clp);
8034 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8036 switch(task->tk_status) {
8037 case -NFS4ERR_DELAY:
8038 rpc_delay(task, NFS4_POLL_RETRY_MAX);
8041 nfs4_schedule_lease_recovery(clp);
8046 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
8048 struct nfs4_sequence_data *calldata = data;
8049 struct nfs_client *clp = calldata->clp;
8051 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
8054 trace_nfs4_sequence(clp, task->tk_status);
8055 if (task->tk_status < 0) {
8056 dprintk("%s ERROR %d\n", __func__, task->tk_status);
8057 if (atomic_read(&clp->cl_count) == 1)
8060 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
8061 rpc_restart_call_prepare(task);
8065 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
8067 dprintk("<-- %s\n", __func__);
8070 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
8072 struct nfs4_sequence_data *calldata = data;
8073 struct nfs_client *clp = calldata->clp;
8074 struct nfs4_sequence_args *args;
8075 struct nfs4_sequence_res *res;
8077 args = task->tk_msg.rpc_argp;
8078 res = task->tk_msg.rpc_resp;
8080 nfs4_setup_sequence(clp, args, res, task);
8083 static const struct rpc_call_ops nfs41_sequence_ops = {
8084 .rpc_call_done = nfs41_sequence_call_done,
8085 .rpc_call_prepare = nfs41_sequence_prepare,
8086 .rpc_release = nfs41_sequence_release,
8089 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
8090 struct rpc_cred *cred,
8093 struct nfs4_sequence_data *calldata;
8094 struct rpc_message msg = {
8095 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
8098 struct rpc_task_setup task_setup_data = {
8099 .rpc_client = clp->cl_rpcclient,
8100 .rpc_message = &msg,
8101 .callback_ops = &nfs41_sequence_ops,
8102 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
8105 if (!atomic_inc_not_zero(&clp->cl_count))
8106 return ERR_PTR(-EIO);
8107 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
8108 if (calldata == NULL) {
8109 nfs_put_client(clp);
8110 return ERR_PTR(-ENOMEM);
8112 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8114 nfs4_set_sequence_privileged(&calldata->args);
8115 msg.rpc_argp = &calldata->args;
8116 msg.rpc_resp = &calldata->res;
8117 calldata->clp = clp;
8118 task_setup_data.callback_data = calldata;
8120 return rpc_run_task(&task_setup_data);
8123 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
8125 struct rpc_task *task;
8128 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
8130 task = _nfs41_proc_sequence(clp, cred, false);
8132 ret = PTR_ERR(task);
8134 rpc_put_task_async(task);
8135 dprintk("<-- %s status=%d\n", __func__, ret);
8139 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
8141 struct rpc_task *task;
8144 task = _nfs41_proc_sequence(clp, cred, true);
8146 ret = PTR_ERR(task);
8149 ret = rpc_wait_for_completion_task(task);
8151 ret = task->tk_status;
8154 dprintk("<-- %s status=%d\n", __func__, ret);
8158 struct nfs4_reclaim_complete_data {
8159 struct nfs_client *clp;
8160 struct nfs41_reclaim_complete_args arg;
8161 struct nfs41_reclaim_complete_res res;
8164 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
8166 struct nfs4_reclaim_complete_data *calldata = data;
8168 nfs4_setup_sequence(calldata->clp,
8169 &calldata->arg.seq_args,
8170 &calldata->res.seq_res,
8174 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8176 switch(task->tk_status) {
8178 case -NFS4ERR_COMPLETE_ALREADY:
8179 case -NFS4ERR_WRONG_CRED: /* What to do here? */
8181 case -NFS4ERR_DELAY:
8182 rpc_delay(task, NFS4_POLL_RETRY_MAX);
8184 case -NFS4ERR_RETRY_UNCACHED_REP:
8187 nfs4_schedule_lease_recovery(clp);
8192 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
8194 struct nfs4_reclaim_complete_data *calldata = data;
8195 struct nfs_client *clp = calldata->clp;
8196 struct nfs4_sequence_res *res = &calldata->res.seq_res;
8198 dprintk("--> %s\n", __func__);
8199 if (!nfs41_sequence_done(task, res))
8202 trace_nfs4_reclaim_complete(clp, task->tk_status);
8203 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
8204 rpc_restart_call_prepare(task);
8207 dprintk("<-- %s\n", __func__);
8210 static void nfs4_free_reclaim_complete_data(void *data)
8212 struct nfs4_reclaim_complete_data *calldata = data;
8217 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
8218 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
8219 .rpc_call_done = nfs4_reclaim_complete_done,
8220 .rpc_release = nfs4_free_reclaim_complete_data,
8224 * Issue a global reclaim complete.
8226 static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
8227 struct rpc_cred *cred)
8229 struct nfs4_reclaim_complete_data *calldata;
8230 struct rpc_task *task;
8231 struct rpc_message msg = {
8232 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
8235 struct rpc_task_setup task_setup_data = {
8236 .rpc_client = clp->cl_rpcclient,
8237 .rpc_message = &msg,
8238 .callback_ops = &nfs4_reclaim_complete_call_ops,
8239 .flags = RPC_TASK_ASYNC,
8241 int status = -ENOMEM;
8243 dprintk("--> %s\n", __func__);
8244 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
8245 if (calldata == NULL)
8247 calldata->clp = clp;
8248 calldata->arg.one_fs = 0;
8250 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8251 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
8252 msg.rpc_argp = &calldata->arg;
8253 msg.rpc_resp = &calldata->res;
8254 task_setup_data.callback_data = calldata;
8255 task = rpc_run_task(&task_setup_data);
8257 status = PTR_ERR(task);
8260 status = rpc_wait_for_completion_task(task);
8262 status = task->tk_status;
8266 dprintk("<-- %s status=%d\n", __func__, status);
8271 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
8273 struct nfs4_layoutget *lgp = calldata;
8274 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
8276 dprintk("--> %s\n", __func__);
8277 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args,
8278 &lgp->res.seq_res, task);
8279 dprintk("<-- %s\n", __func__);
8282 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
8284 struct nfs4_layoutget *lgp = calldata;
8286 dprintk("--> %s\n", __func__);
8287 nfs41_sequence_process(task, &lgp->res.seq_res);
8288 dprintk("<-- %s\n", __func__);
8292 nfs4_layoutget_handle_exception(struct rpc_task *task,
8293 struct nfs4_layoutget *lgp, struct nfs4_exception *exception)
8295 struct inode *inode = lgp->args.inode;
8296 struct nfs_server *server = NFS_SERVER(inode);
8297 struct pnfs_layout_hdr *lo;
8298 int nfs4err = task->tk_status;
8299 int err, status = 0;
8302 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
8309 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
8310 * on the file. set tk_status to -ENODATA to tell upper layer to
8313 case -NFS4ERR_LAYOUTUNAVAILABLE:
8317 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
8318 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
8320 case -NFS4ERR_BADLAYOUT:
8321 status = -EOVERFLOW;
8324 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
8325 * (or clients) writing to the same RAID stripe except when
8326 * the minlength argument is 0 (see RFC5661 section 18.43.3).
8328 * Treat it like we would RECALLCONFLICT -- we retry for a little
8329 * while, and then eventually give up.
8331 case -NFS4ERR_LAYOUTTRYLATER:
8332 if (lgp->args.minlength == 0) {
8333 status = -EOVERFLOW;
8338 case -NFS4ERR_RECALLCONFLICT:
8339 status = -ERECALLCONFLICT;
8341 case -NFS4ERR_DELEG_REVOKED:
8342 case -NFS4ERR_ADMIN_REVOKED:
8343 case -NFS4ERR_EXPIRED:
8344 case -NFS4ERR_BAD_STATEID:
8345 exception->timeout = 0;
8346 spin_lock(&inode->i_lock);
8347 lo = NFS_I(inode)->layout;
8348 /* If the open stateid was bad, then recover it. */
8349 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
8350 nfs4_stateid_match_other(&lgp->args.stateid,
8351 &lgp->args.ctx->state->stateid)) {
8352 spin_unlock(&inode->i_lock);
8353 exception->state = lgp->args.ctx->state;
8354 exception->stateid = &lgp->args.stateid;
8359 * Mark the bad layout state as invalid, then retry
8361 pnfs_mark_layout_stateid_invalid(lo, &head);
8362 spin_unlock(&inode->i_lock);
8363 pnfs_free_lseg_list(&head);
8368 nfs4_sequence_free_slot(&lgp->res.seq_res);
8369 err = nfs4_handle_exception(server, nfs4err, exception);
8371 if (exception->retry)
8377 dprintk("<-- %s\n", __func__);
8381 static size_t max_response_pages(struct nfs_server *server)
8383 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
8384 return nfs_page_array_len(0, max_resp_sz);
8387 static void nfs4_free_pages(struct page **pages, size_t size)
8394 for (i = 0; i < size; i++) {
8397 __free_page(pages[i]);
8402 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
8404 struct page **pages;
8407 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
8409 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
8413 for (i = 0; i < size; i++) {
8414 pages[i] = alloc_page(gfp_flags);
8416 dprintk("%s: failed to allocate page\n", __func__);
8417 nfs4_free_pages(pages, size);
8425 static void nfs4_layoutget_release(void *calldata)
8427 struct nfs4_layoutget *lgp = calldata;
8428 struct inode *inode = lgp->args.inode;
8429 struct nfs_server *server = NFS_SERVER(inode);
8430 size_t max_pages = max_response_pages(server);
8432 dprintk("--> %s\n", __func__);
8433 nfs4_free_pages(lgp->args.layout.pages, max_pages);
8434 pnfs_put_layout_hdr(NFS_I(inode)->layout);
8435 put_nfs_open_context(lgp->args.ctx);
8437 dprintk("<-- %s\n", __func__);
8440 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
8441 .rpc_call_prepare = nfs4_layoutget_prepare,
8442 .rpc_call_done = nfs4_layoutget_done,
8443 .rpc_release = nfs4_layoutget_release,
8446 struct pnfs_layout_segment *
8447 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags)
8449 struct inode *inode = lgp->args.inode;
8450 struct nfs_server *server = NFS_SERVER(inode);
8451 size_t max_pages = max_response_pages(server);
8452 struct rpc_task *task;
8453 struct rpc_message msg = {
8454 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
8455 .rpc_argp = &lgp->args,
8456 .rpc_resp = &lgp->res,
8457 .rpc_cred = lgp->cred,
8459 struct rpc_task_setup task_setup_data = {
8460 .rpc_client = server->client,
8461 .rpc_message = &msg,
8462 .callback_ops = &nfs4_layoutget_call_ops,
8463 .callback_data = lgp,
8464 .flags = RPC_TASK_ASYNC,
8466 struct pnfs_layout_segment *lseg = NULL;
8467 struct nfs4_exception exception = {
8469 .timeout = *timeout,
8473 dprintk("--> %s\n", __func__);
8475 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
8476 pnfs_get_layout_hdr(NFS_I(inode)->layout);
8478 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
8479 if (!lgp->args.layout.pages) {
8480 nfs4_layoutget_release(lgp);
8481 return ERR_PTR(-ENOMEM);
8483 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
8485 lgp->res.layoutp = &lgp->args.layout;
8486 lgp->res.seq_res.sr_slot = NULL;
8487 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
8489 task = rpc_run_task(&task_setup_data);
8491 return ERR_CAST(task);
8492 status = rpc_wait_for_completion_task(task);
8494 status = nfs4_layoutget_handle_exception(task, lgp, &exception);
8495 *timeout = exception.timeout;
8498 trace_nfs4_layoutget(lgp->args.ctx,
8504 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8505 if (status == 0 && lgp->res.layoutp->len)
8506 lseg = pnfs_layout_process(lgp);
8507 nfs4_sequence_free_slot(&lgp->res.seq_res);
8509 dprintk("<-- %s status=%d\n", __func__, status);
8511 return ERR_PTR(status);
8516 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8518 struct nfs4_layoutreturn *lrp = calldata;
8520 dprintk("--> %s\n", __func__);
8521 nfs4_setup_sequence(lrp->clp,
8522 &lrp->args.seq_args,
8527 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8529 struct nfs4_layoutreturn *lrp = calldata;
8530 struct nfs_server *server;
8532 dprintk("--> %s\n", __func__);
8534 if (!nfs41_sequence_process(task, &lrp->res.seq_res))
8537 server = NFS_SERVER(lrp->args.inode);
8538 switch (task->tk_status) {
8540 task->tk_status = 0;
8543 case -NFS4ERR_DELAY:
8544 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
8546 nfs4_sequence_free_slot(&lrp->res.seq_res);
8547 rpc_restart_call_prepare(task);
8550 dprintk("<-- %s\n", __func__);
8553 static void nfs4_layoutreturn_release(void *calldata)
8555 struct nfs4_layoutreturn *lrp = calldata;
8556 struct pnfs_layout_hdr *lo = lrp->args.layout;
8558 dprintk("--> %s\n", __func__);
8559 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range,
8560 lrp->res.lrs_present ? &lrp->res.stateid : NULL);
8561 nfs4_sequence_free_slot(&lrp->res.seq_res);
8562 if (lrp->ld_private.ops && lrp->ld_private.ops->free)
8563 lrp->ld_private.ops->free(&lrp->ld_private);
8564 pnfs_put_layout_hdr(lrp->args.layout);
8565 nfs_iput_and_deactive(lrp->inode);
8567 dprintk("<-- %s\n", __func__);
8570 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8571 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8572 .rpc_call_done = nfs4_layoutreturn_done,
8573 .rpc_release = nfs4_layoutreturn_release,
8576 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
8578 struct rpc_task *task;
8579 struct rpc_message msg = {
8580 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8581 .rpc_argp = &lrp->args,
8582 .rpc_resp = &lrp->res,
8583 .rpc_cred = lrp->cred,
8585 struct rpc_task_setup task_setup_data = {
8586 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
8587 .rpc_message = &msg,
8588 .callback_ops = &nfs4_layoutreturn_call_ops,
8589 .callback_data = lrp,
8593 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
8594 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
8595 &task_setup_data.rpc_client, &msg);
8597 dprintk("--> %s\n", __func__);
8599 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8601 nfs4_layoutreturn_release(lrp);
8604 task_setup_data.flags |= RPC_TASK_ASYNC;
8606 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
8607 task = rpc_run_task(&task_setup_data);
8609 return PTR_ERR(task);
8611 status = task->tk_status;
8612 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
8613 dprintk("<-- %s status=%d\n", __func__, status);
8619 _nfs4_proc_getdeviceinfo(struct nfs_server *server,
8620 struct pnfs_device *pdev,
8621 struct rpc_cred *cred)
8623 struct nfs4_getdeviceinfo_args args = {
8625 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8626 NOTIFY_DEVICEID4_DELETE,
8628 struct nfs4_getdeviceinfo_res res = {
8631 struct rpc_message msg = {
8632 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8639 dprintk("--> %s\n", __func__);
8640 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
8641 if (res.notification & ~args.notify_types)
8642 dprintk("%s: unsupported notification\n", __func__);
8643 if (res.notification != args.notify_types)
8646 dprintk("<-- %s status=%d\n", __func__, status);
8651 int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8652 struct pnfs_device *pdev,
8653 struct rpc_cred *cred)
8655 struct nfs4_exception exception = { };
8659 err = nfs4_handle_exception(server,
8660 _nfs4_proc_getdeviceinfo(server, pdev, cred),
8662 } while (exception.retry);
8665 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8667 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8669 struct nfs4_layoutcommit_data *data = calldata;
8670 struct nfs_server *server = NFS_SERVER(data->args.inode);
8672 nfs4_setup_sequence(server->nfs_client,
8673 &data->args.seq_args,
8679 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8681 struct nfs4_layoutcommit_data *data = calldata;
8682 struct nfs_server *server = NFS_SERVER(data->args.inode);
8684 if (!nfs41_sequence_done(task, &data->res.seq_res))
8687 switch (task->tk_status) { /* Just ignore these failures */
8688 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8689 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8690 case -NFS4ERR_BADLAYOUT: /* no layout */
8691 case -NFS4ERR_GRACE: /* loca_recalim always false */
8692 task->tk_status = 0;
8696 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
8697 rpc_restart_call_prepare(task);
8703 static void nfs4_layoutcommit_release(void *calldata)
8705 struct nfs4_layoutcommit_data *data = calldata;
8707 pnfs_cleanup_layoutcommit(data);
8708 nfs_post_op_update_inode_force_wcc(data->args.inode,
8710 put_rpccred(data->cred);
8711 nfs_iput_and_deactive(data->inode);
8715 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8716 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8717 .rpc_call_done = nfs4_layoutcommit_done,
8718 .rpc_release = nfs4_layoutcommit_release,
8722 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
8724 struct rpc_message msg = {
8725 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8726 .rpc_argp = &data->args,
8727 .rpc_resp = &data->res,
8728 .rpc_cred = data->cred,
8730 struct rpc_task_setup task_setup_data = {
8731 .task = &data->task,
8732 .rpc_client = NFS_CLIENT(data->args.inode),
8733 .rpc_message = &msg,
8734 .callback_ops = &nfs4_layoutcommit_ops,
8735 .callback_data = data,
8737 struct rpc_task *task;
8740 dprintk("NFS: initiating layoutcommit call. sync %d "
8741 "lbw: %llu inode %lu\n", sync,
8742 data->args.lastbytewritten,
8743 data->args.inode->i_ino);
8746 data->inode = nfs_igrab_and_active(data->args.inode);
8747 if (data->inode == NULL) {
8748 nfs4_layoutcommit_release(data);
8751 task_setup_data.flags = RPC_TASK_ASYNC;
8753 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
8754 task = rpc_run_task(&task_setup_data);
8756 return PTR_ERR(task);
8758 status = task->tk_status;
8759 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
8760 dprintk("%s: status %d\n", __func__, status);
8766 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8767 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8770 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8771 struct nfs_fsinfo *info,
8772 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
8774 struct nfs41_secinfo_no_name_args args = {
8775 .style = SECINFO_STYLE_CURRENT_FH,
8777 struct nfs4_secinfo_res res = {
8780 struct rpc_message msg = {
8781 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8785 struct rpc_clnt *clnt = server->client;
8786 struct rpc_cred *cred = NULL;
8789 if (use_integrity) {
8790 clnt = server->nfs_client->cl_rpcclient;
8791 cred = nfs4_get_clid_cred(server->nfs_client);
8792 msg.rpc_cred = cred;
8795 dprintk("--> %s\n", __func__);
8796 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8798 dprintk("<-- %s status=%d\n", __func__, status);
8807 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8808 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8810 struct nfs4_exception exception = { };
8813 /* first try using integrity protection */
8814 err = -NFS4ERR_WRONGSEC;
8816 /* try to use integrity protection with machine cred */
8817 if (_nfs4_is_integrity_protected(server->nfs_client))
8818 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8822 * if unable to use integrity protection, or SECINFO with
8823 * integrity protection returns NFS4ERR_WRONGSEC (which is
8824 * disallowed by spec, but exists in deployed servers) use
8825 * the current filesystem's rpc_client and the user cred.
8827 if (err == -NFS4ERR_WRONGSEC)
8828 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8833 case -NFS4ERR_WRONGSEC:
8837 err = nfs4_handle_exception(server, err, &exception);
8839 } while (exception.retry);
8845 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8846 struct nfs_fsinfo *info)
8850 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
8851 struct nfs4_secinfo_flavors *flavors;
8852 struct nfs4_secinfo4 *secinfo;
8855 page = alloc_page(GFP_KERNEL);
8861 flavors = page_address(page);
8862 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8865 * Fall back on "guess and check" method if
8866 * the server doesn't support SECINFO_NO_NAME
8868 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
8869 err = nfs4_find_root_sec(server, fhandle, info);
8875 for (i = 0; i < flavors->num_flavors; i++) {
8876 secinfo = &flavors->flavors[i];
8878 switch (secinfo->flavor) {
8882 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8883 &secinfo->flavor_info);
8886 flavor = RPC_AUTH_MAXFLAVOR;
8890 if (!nfs_auth_info_match(&server->auth_info, flavor))
8891 flavor = RPC_AUTH_MAXFLAVOR;
8893 if (flavor != RPC_AUTH_MAXFLAVOR) {
8894 err = nfs4_lookup_root_sec(server, fhandle,
8901 if (flavor == RPC_AUTH_MAXFLAVOR)
8912 static int _nfs41_test_stateid(struct nfs_server *server,
8913 nfs4_stateid *stateid,
8914 struct rpc_cred *cred)
8917 struct nfs41_test_stateid_args args = {
8920 struct nfs41_test_stateid_res res;
8921 struct rpc_message msg = {
8922 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8927 struct rpc_clnt *rpc_client = server->client;
8929 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8932 dprintk("NFS call test_stateid %p\n", stateid);
8933 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8934 nfs4_set_sequence_privileged(&args.seq_args);
8935 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8936 &args.seq_args, &res.seq_res);
8937 if (status != NFS_OK) {
8938 dprintk("NFS reply test_stateid: failed, %d\n", status);
8941 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
8945 static void nfs4_handle_delay_or_session_error(struct nfs_server *server,
8946 int err, struct nfs4_exception *exception)
8948 exception->retry = 0;
8950 case -NFS4ERR_DELAY:
8951 case -NFS4ERR_RETRY_UNCACHED_REP:
8952 nfs4_handle_exception(server, err, exception);
8954 case -NFS4ERR_BADSESSION:
8955 case -NFS4ERR_BADSLOT:
8956 case -NFS4ERR_BAD_HIGH_SLOT:
8957 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
8958 case -NFS4ERR_DEADSESSION:
8959 nfs4_do_handle_exception(server, err, exception);
8964 * nfs41_test_stateid - perform a TEST_STATEID operation
8966 * @server: server / transport on which to perform the operation
8967 * @stateid: state ID to test
8970 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8971 * Otherwise a negative NFS4ERR value is returned if the operation
8972 * failed or the state ID is not currently valid.
8974 static int nfs41_test_stateid(struct nfs_server *server,
8975 nfs4_stateid *stateid,
8976 struct rpc_cred *cred)
8978 struct nfs4_exception exception = { };
8981 err = _nfs41_test_stateid(server, stateid, cred);
8982 nfs4_handle_delay_or_session_error(server, err, &exception);
8983 } while (exception.retry);
8987 struct nfs_free_stateid_data {
8988 struct nfs_server *server;
8989 struct nfs41_free_stateid_args args;
8990 struct nfs41_free_stateid_res res;
8993 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8995 struct nfs_free_stateid_data *data = calldata;
8996 nfs4_setup_sequence(data->server->nfs_client,
8997 &data->args.seq_args,
9002 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
9004 struct nfs_free_stateid_data *data = calldata;
9006 nfs41_sequence_done(task, &data->res.seq_res);
9008 switch (task->tk_status) {
9009 case -NFS4ERR_DELAY:
9010 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
9011 rpc_restart_call_prepare(task);
9015 static void nfs41_free_stateid_release(void *calldata)
9020 static const struct rpc_call_ops nfs41_free_stateid_ops = {
9021 .rpc_call_prepare = nfs41_free_stateid_prepare,
9022 .rpc_call_done = nfs41_free_stateid_done,
9023 .rpc_release = nfs41_free_stateid_release,
9026 static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
9027 const nfs4_stateid *stateid,
9028 struct rpc_cred *cred,
9031 struct rpc_message msg = {
9032 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
9035 struct rpc_task_setup task_setup = {
9036 .rpc_client = server->client,
9037 .rpc_message = &msg,
9038 .callback_ops = &nfs41_free_stateid_ops,
9039 .flags = RPC_TASK_ASYNC,
9041 struct nfs_free_stateid_data *data;
9043 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9044 &task_setup.rpc_client, &msg);
9046 dprintk("NFS call free_stateid %p\n", stateid);
9047 data = kmalloc(sizeof(*data), GFP_NOFS);
9049 return ERR_PTR(-ENOMEM);
9050 data->server = server;
9051 nfs4_stateid_copy(&data->args.stateid, stateid);
9053 task_setup.callback_data = data;
9055 msg.rpc_argp = &data->args;
9056 msg.rpc_resp = &data->res;
9057 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
9059 nfs4_set_sequence_privileged(&data->args.seq_args);
9061 return rpc_run_task(&task_setup);
9065 * nfs41_free_stateid - perform a FREE_STATEID operation
9067 * @server: server / transport on which to perform the operation
9068 * @stateid: state ID to release
9070 * @is_recovery: set to true if this call needs to be privileged
9072 * Note: this function is always asynchronous.
9074 static int nfs41_free_stateid(struct nfs_server *server,
9075 const nfs4_stateid *stateid,
9076 struct rpc_cred *cred,
9079 struct rpc_task *task;
9081 task = _nfs41_free_stateid(server, stateid, cred, is_recovery);
9083 return PTR_ERR(task);
9089 nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
9091 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
9093 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
9094 nfs4_free_lock_state(server, lsp);
9097 static bool nfs41_match_stateid(const nfs4_stateid *s1,
9098 const nfs4_stateid *s2)
9100 if (s1->type != s2->type)
9103 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
9106 if (s1->seqid == s2->seqid)
9109 return s1->seqid == 0 || s2->seqid == 0;
9112 #endif /* CONFIG_NFS_V4_1 */
9114 static bool nfs4_match_stateid(const nfs4_stateid *s1,
9115 const nfs4_stateid *s2)
9117 return nfs4_stateid_match(s1, s2);
9121 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
9122 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9123 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9124 .recover_open = nfs4_open_reclaim,
9125 .recover_lock = nfs4_lock_reclaim,
9126 .establish_clid = nfs4_init_clientid,
9127 .detect_trunking = nfs40_discover_server_trunking,
9130 #if defined(CONFIG_NFS_V4_1)
9131 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
9132 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9133 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9134 .recover_open = nfs4_open_reclaim,
9135 .recover_lock = nfs4_lock_reclaim,
9136 .establish_clid = nfs41_init_clientid,
9137 .reclaim_complete = nfs41_proc_reclaim_complete,
9138 .detect_trunking = nfs41_discover_server_trunking,
9140 #endif /* CONFIG_NFS_V4_1 */
9142 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
9143 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9144 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
9145 .recover_open = nfs40_open_expired,
9146 .recover_lock = nfs4_lock_expired,
9147 .establish_clid = nfs4_init_clientid,
9150 #if defined(CONFIG_NFS_V4_1)
9151 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
9152 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9153 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
9154 .recover_open = nfs41_open_expired,
9155 .recover_lock = nfs41_lock_expired,
9156 .establish_clid = nfs41_init_clientid,
9158 #endif /* CONFIG_NFS_V4_1 */
9160 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
9161 .sched_state_renewal = nfs4_proc_async_renew,
9162 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
9163 .renew_lease = nfs4_proc_renew,
9166 #if defined(CONFIG_NFS_V4_1)
9167 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
9168 .sched_state_renewal = nfs41_proc_async_sequence,
9169 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
9170 .renew_lease = nfs4_proc_sequence,
9174 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
9175 .get_locations = _nfs40_proc_get_locations,
9176 .fsid_present = _nfs40_proc_fsid_present,
9179 #if defined(CONFIG_NFS_V4_1)
9180 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
9181 .get_locations = _nfs41_proc_get_locations,
9182 .fsid_present = _nfs41_proc_fsid_present,
9184 #endif /* CONFIG_NFS_V4_1 */
9186 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
9188 .init_caps = NFS_CAP_READDIRPLUS
9189 | NFS_CAP_ATOMIC_OPEN
9190 | NFS_CAP_POSIX_LOCK,
9191 .init_client = nfs40_init_client,
9192 .shutdown_client = nfs40_shutdown_client,
9193 .match_stateid = nfs4_match_stateid,
9194 .find_root_sec = nfs4_find_root_sec,
9195 .free_lock_state = nfs4_release_lockowner,
9196 .test_and_free_expired = nfs40_test_and_free_expired_stateid,
9197 .alloc_seqid = nfs_alloc_seqid,
9198 .call_sync_ops = &nfs40_call_sync_ops,
9199 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
9200 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
9201 .state_renewal_ops = &nfs40_state_renewal_ops,
9202 .mig_recovery_ops = &nfs40_mig_recovery_ops,
9205 #if defined(CONFIG_NFS_V4_1)
9206 static struct nfs_seqid *
9207 nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
9212 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
9214 .init_caps = NFS_CAP_READDIRPLUS
9215 | NFS_CAP_ATOMIC_OPEN
9216 | NFS_CAP_POSIX_LOCK
9217 | NFS_CAP_STATEID_NFSV41
9218 | NFS_CAP_ATOMIC_OPEN_V1,
9219 .init_client = nfs41_init_client,
9220 .shutdown_client = nfs41_shutdown_client,
9221 .match_stateid = nfs41_match_stateid,
9222 .find_root_sec = nfs41_find_root_sec,
9223 .free_lock_state = nfs41_free_lock_state,
9224 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
9225 .alloc_seqid = nfs_alloc_no_seqid,
9226 .session_trunk = nfs4_test_session_trunk,
9227 .call_sync_ops = &nfs41_call_sync_ops,
9228 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9229 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9230 .state_renewal_ops = &nfs41_state_renewal_ops,
9231 .mig_recovery_ops = &nfs41_mig_recovery_ops,
9235 #if defined(CONFIG_NFS_V4_2)
9236 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
9238 .init_caps = NFS_CAP_READDIRPLUS
9239 | NFS_CAP_ATOMIC_OPEN
9240 | NFS_CAP_POSIX_LOCK
9241 | NFS_CAP_STATEID_NFSV41
9242 | NFS_CAP_ATOMIC_OPEN_V1
9245 | NFS_CAP_DEALLOCATE
9247 | NFS_CAP_LAYOUTSTATS
9249 .init_client = nfs41_init_client,
9250 .shutdown_client = nfs41_shutdown_client,
9251 .match_stateid = nfs41_match_stateid,
9252 .find_root_sec = nfs41_find_root_sec,
9253 .free_lock_state = nfs41_free_lock_state,
9254 .call_sync_ops = &nfs41_call_sync_ops,
9255 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
9256 .alloc_seqid = nfs_alloc_no_seqid,
9257 .session_trunk = nfs4_test_session_trunk,
9258 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9259 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9260 .state_renewal_ops = &nfs41_state_renewal_ops,
9261 .mig_recovery_ops = &nfs41_mig_recovery_ops,
9265 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
9266 [0] = &nfs_v4_0_minor_ops,
9267 #if defined(CONFIG_NFS_V4_1)
9268 [1] = &nfs_v4_1_minor_ops,
9270 #if defined(CONFIG_NFS_V4_2)
9271 [2] = &nfs_v4_2_minor_ops,
9275 static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
9277 ssize_t error, error2;
9279 error = generic_listxattr(dentry, list, size);
9287 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
9290 return error + error2;
9293 static const struct inode_operations nfs4_dir_inode_operations = {
9294 .create = nfs_create,
9295 .lookup = nfs_lookup,
9296 .atomic_open = nfs_atomic_open,
9298 .unlink = nfs_unlink,
9299 .symlink = nfs_symlink,
9303 .rename = nfs_rename,
9304 .permission = nfs_permission,
9305 .getattr = nfs_getattr,
9306 .setattr = nfs_setattr,
9307 .listxattr = nfs4_listxattr,
9310 static const struct inode_operations nfs4_file_inode_operations = {
9311 .permission = nfs_permission,
9312 .getattr = nfs_getattr,
9313 .setattr = nfs_setattr,
9314 .listxattr = nfs4_listxattr,
9317 const struct nfs_rpc_ops nfs_v4_clientops = {
9318 .version = 4, /* protocol version */
9319 .dentry_ops = &nfs4_dentry_operations,
9320 .dir_inode_ops = &nfs4_dir_inode_operations,
9321 .file_inode_ops = &nfs4_file_inode_operations,
9322 .file_ops = &nfs4_file_operations,
9323 .getroot = nfs4_proc_get_root,
9324 .submount = nfs4_submount,
9325 .try_mount = nfs4_try_mount,
9326 .getattr = nfs4_proc_getattr,
9327 .setattr = nfs4_proc_setattr,
9328 .lookup = nfs4_proc_lookup,
9329 .access = nfs4_proc_access,
9330 .readlink = nfs4_proc_readlink,
9331 .create = nfs4_proc_create,
9332 .remove = nfs4_proc_remove,
9333 .unlink_setup = nfs4_proc_unlink_setup,
9334 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
9335 .unlink_done = nfs4_proc_unlink_done,
9336 .rename_setup = nfs4_proc_rename_setup,
9337 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
9338 .rename_done = nfs4_proc_rename_done,
9339 .link = nfs4_proc_link,
9340 .symlink = nfs4_proc_symlink,
9341 .mkdir = nfs4_proc_mkdir,
9342 .rmdir = nfs4_proc_remove,
9343 .readdir = nfs4_proc_readdir,
9344 .mknod = nfs4_proc_mknod,
9345 .statfs = nfs4_proc_statfs,
9346 .fsinfo = nfs4_proc_fsinfo,
9347 .pathconf = nfs4_proc_pathconf,
9348 .set_capabilities = nfs4_server_capabilities,
9349 .decode_dirent = nfs4_decode_dirent,
9350 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
9351 .read_setup = nfs4_proc_read_setup,
9352 .read_done = nfs4_read_done,
9353 .write_setup = nfs4_proc_write_setup,
9354 .write_done = nfs4_write_done,
9355 .commit_setup = nfs4_proc_commit_setup,
9356 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
9357 .commit_done = nfs4_commit_done,
9358 .lock = nfs4_proc_lock,
9359 .clear_acl_cache = nfs4_zap_acl_attr,
9360 .close_context = nfs4_close_context,
9361 .open_context = nfs4_atomic_open,
9362 .have_delegation = nfs4_have_delegation,
9363 .return_delegation = nfs4_inode_return_delegation,
9364 .alloc_client = nfs4_alloc_client,
9365 .init_client = nfs4_init_client,
9366 .free_client = nfs4_free_client,
9367 .create_server = nfs4_create_server,
9368 .clone_server = nfs_clone_server,
9371 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
9372 .name = XATTR_NAME_NFSV4_ACL,
9373 .list = nfs4_xattr_list_nfs4_acl,
9374 .get = nfs4_xattr_get_nfs4_acl,
9375 .set = nfs4_xattr_set_nfs4_acl,
9378 const struct xattr_handler *nfs4_xattr_handlers[] = {
9379 &nfs4_xattr_nfs4_acl_handler,
9380 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
9381 &nfs4_xattr_nfs4_label_handler,