1 /* SPDX-License-Identifier: GPL-2.0 */
3 * linux/fs/nfs/nfs4_fs.h
5 * Copyright (C) 2005 Trond Myklebust
7 * NFSv4-specific filesystem definitions and declarations
10 #ifndef __LINUX_FS_NFS_NFS4_FS_H
11 #define __LINUX_FS_NFS_NFS4_FS_H
13 #if defined(CONFIG_NFS_V4_2)
14 #define NFS4_MAX_MINOR_VERSION 2
15 #elif defined(CONFIG_NFS_V4_1)
16 #define NFS4_MAX_MINOR_VERSION 1
18 #define NFS4_MAX_MINOR_VERSION 0
21 #if IS_ENABLED(CONFIG_NFS_V4)
23 #define NFS4_MAX_LOOP_ON_RECOVER (10)
25 #include <linux/seqlock.h>
29 enum nfs4_client_state {
30 NFS4CLNT_MANAGER_RUNNING = 0,
32 NFS4CLNT_LEASE_EXPIRED,
33 NFS4CLNT_RECLAIM_REBOOT,
34 NFS4CLNT_RECLAIM_NOGRACE,
36 NFS4CLNT_SESSION_RESET,
37 NFS4CLNT_LEASE_CONFIRM,
38 NFS4CLNT_SERVER_SCOPE_MISMATCH,
40 NFS4CLNT_BIND_CONN_TO_SESSION,
43 NFS4CLNT_DELEGATION_EXPIRED,
45 NFS4CLNT_RECALL_RUNNING,
46 NFS4CLNT_RECALL_ANY_LAYOUT_READ,
47 NFS4CLNT_RECALL_ANY_LAYOUT_RW,
50 #define NFS4_RENEW_TIMEOUT 0x01
51 #define NFS4_RENEW_DELEGATION_CB 0x02
53 struct nfs_seqid_counter;
54 struct nfs4_minor_version_ops {
58 int (*init_client)(struct nfs_client *);
59 void (*shutdown_client)(struct nfs_client *);
60 bool (*match_stateid)(const nfs4_stateid *,
61 const nfs4_stateid *);
62 int (*find_root_sec)(struct nfs_server *, struct nfs_fh *,
64 void (*free_lock_state)(struct nfs_server *,
65 struct nfs4_lock_state *);
66 int (*test_and_free_expired)(struct nfs_server *,
67 nfs4_stateid *, const struct cred *);
69 (*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
70 void (*session_trunk)(struct rpc_clnt *clnt,
71 struct rpc_xprt *xprt, void *data);
72 const struct rpc_call_ops *call_sync_ops;
73 const struct nfs4_state_recovery_ops *reboot_recovery_ops;
74 const struct nfs4_state_recovery_ops *nograce_recovery_ops;
75 const struct nfs4_state_maintenance_ops *state_renewal_ops;
76 const struct nfs4_mig_recovery_ops *mig_recovery_ops;
79 #define NFS_SEQID_CONFIRMED 1
80 struct nfs_seqid_counter {
85 spinlock_t lock; /* Protects the list */
86 struct list_head list; /* Defines sequence of RPC calls */
87 struct rpc_wait_queue wait; /* RPC call delay queue */
91 struct nfs_seqid_counter *sequence;
92 struct list_head list;
93 struct rpc_task *task;
96 static inline void nfs_confirm_seqid(struct nfs_seqid_counter *seqid, int status)
98 if (seqid_mutating_err(-status))
99 seqid->flags |= NFS_SEQID_CONFIRMED;
103 * NFS4 state_owners and lock_owners are simply labels for ordered
104 * sequences of RPC calls. Their sole purpose is to provide once-only
105 * semantics by allowing the server to identify replayed requests.
107 struct nfs4_state_owner {
108 struct nfs_server *so_server;
109 struct list_head so_lru;
110 unsigned long so_expires;
111 struct rb_node so_server_node;
113 const struct cred *so_cred; /* Associated cred */
117 unsigned long so_flags;
118 struct list_head so_states;
119 struct nfs_seqid_counter so_seqid;
120 seqcount_t so_reclaim_seqcount;
121 struct mutex so_delegreturn_mutex;
125 NFS_OWNER_RECLAIM_REBOOT,
126 NFS_OWNER_RECLAIM_NOGRACE
129 #define NFS_LOCK_NEW 0
130 #define NFS_LOCK_RECLAIM 1
131 #define NFS_LOCK_EXPIRED 2
134 * struct nfs4_state maintains the client-side state for a given
135 * (state_owner,inode) tuple (OPEN) or state_owner (LOCK).
138 * In order to know when to OPEN_DOWNGRADE or CLOSE the state on the server,
139 * we need to know how many files are open for reading or writing on a
140 * given inode. This information too is stored here.
142 * LOCK: one nfs4_state (LOCK) to hold the lock stateid nfs4_state(OPEN)
145 struct nfs4_lock_state {
146 struct list_head ls_locks; /* Other lock stateids */
147 struct nfs4_state * ls_state; /* Pointer to open state */
148 #define NFS_LOCK_INITIALIZED 0
149 #define NFS_LOCK_LOST 1
150 unsigned long ls_flags;
151 struct nfs_seqid_counter ls_seqid;
152 nfs4_stateid ls_stateid;
157 /* bits for nfs4_state->flags */
160 NFS_DELEGATED_STATE, /* Current stateid is delegation */
161 NFS_OPEN_STATE, /* OPEN stateid is set */
162 NFS_O_RDONLY_STATE, /* OPEN stateid has read-only state */
163 NFS_O_WRONLY_STATE, /* OPEN stateid has write-only state */
164 NFS_O_RDWR_STATE, /* OPEN stateid has read/write state */
165 NFS_STATE_RECLAIM_REBOOT, /* OPEN stateid server rebooted */
166 NFS_STATE_RECLAIM_NOGRACE, /* OPEN stateid needs to recover state */
167 NFS_STATE_POSIX_LOCKS, /* Posix locks are supported */
168 NFS_STATE_RECOVERY_FAILED, /* OPEN stateid state recovery failed */
169 NFS_STATE_MAY_NOTIFY_LOCK, /* server may CB_NOTIFY_LOCK */
170 NFS_STATE_CHANGE_WAIT, /* A state changing operation is outstanding */
171 NFS_CLNT_DST_SSC_COPY_STATE, /* dst server open state on client*/
172 NFS_CLNT_SRC_SSC_COPY_STATE, /* src server open state on client*/
173 NFS_SRV_SSC_COPY_STATE, /* ssc state on the dst server */
177 struct list_head open_states; /* List of states for the same state_owner */
178 struct list_head inode_states; /* List of states for the same inode */
179 struct list_head lock_states; /* List of subservient lock stateids */
181 struct nfs4_state_owner *owner; /* Pointer to the open owner */
182 struct inode *inode; /* Pointer to the inode */
184 unsigned long flags; /* Do we hold any locks? */
185 spinlock_t state_lock; /* Protects the lock_states list */
187 seqlock_t seqlock; /* Protects the stateid/open_stateid */
188 nfs4_stateid stateid; /* Current stateid: may be delegation */
189 nfs4_stateid open_stateid; /* OPEN stateid */
191 /* The following 3 fields are protected by owner->so_lock */
192 unsigned int n_rdonly; /* Number of read-only references */
193 unsigned int n_wronly; /* Number of write-only references */
194 unsigned int n_rdwr; /* Number of read/write references */
195 fmode_t state; /* State on the server (R,W, or RW) */
198 wait_queue_head_t waitq;
199 struct rcu_head rcu_head;
203 struct nfs4_exception {
204 struct nfs4_state *state;
206 nfs4_stateid *stateid;
208 unsigned char delay : 1,
214 struct nfs4_state_recovery_ops {
217 int (*recover_open)(struct nfs4_state_owner *, struct nfs4_state *);
218 int (*recover_lock)(struct nfs4_state *, struct file_lock *);
219 int (*establish_clid)(struct nfs_client *, const struct cred *);
220 int (*reclaim_complete)(struct nfs_client *, const struct cred *);
221 int (*detect_trunking)(struct nfs_client *, struct nfs_client **,
222 const struct cred *);
225 struct nfs4_opendata {
227 struct nfs_openargs o_arg;
228 struct nfs_openres o_res;
229 struct nfs_open_confirmargs c_arg;
230 struct nfs_open_confirmres c_res;
231 struct nfs4_string owner_name;
232 struct nfs4_string group_name;
233 struct nfs4_label *a_label;
234 struct nfs_fattr f_attr;
235 struct nfs4_label *f_label;
237 struct dentry *dentry;
238 struct nfs4_state_owner *owner;
239 struct nfs4_state *state;
241 struct nfs4_layoutget *lgp;
242 unsigned long timestamp;
250 struct nfs4_add_xprt_data {
251 struct nfs_client *clp;
252 const struct cred *cred;
255 struct nfs4_state_maintenance_ops {
256 int (*sched_state_renewal)(struct nfs_client *, const struct cred *, unsigned);
257 const struct cred * (*get_state_renewal_cred)(struct nfs_client *);
258 int (*renew_lease)(struct nfs_client *, const struct cred *);
261 struct nfs4_mig_recovery_ops {
262 int (*get_locations)(struct inode *, struct nfs4_fs_locations *,
263 struct page *, const struct cred *);
264 int (*fsid_present)(struct inode *, const struct cred *);
267 extern const struct dentry_operations nfs4_dentry_operations;
270 int nfs_atomic_open(struct inode *, struct dentry *, struct file *,
274 extern struct file_system_type nfs4_fs_type;
276 /* nfs4namespace.c */
277 struct rpc_clnt *nfs4_negotiate_security(struct rpc_clnt *, struct inode *,
278 const struct qstr *);
279 int nfs4_submount(struct fs_context *, struct nfs_server *);
280 int nfs4_replace_transport(struct nfs_server *server,
281 const struct nfs4_fs_locations *locations);
284 extern int nfs4_handle_exception(struct nfs_server *, int, struct nfs4_exception *);
285 extern int nfs4_async_handle_error(struct rpc_task *task,
286 struct nfs_server *server,
287 struct nfs4_state *state, long *timeout);
288 extern int nfs4_call_sync(struct rpc_clnt *, struct nfs_server *,
289 struct rpc_message *, struct nfs4_sequence_args *,
290 struct nfs4_sequence_res *, int);
291 extern void nfs4_init_sequence(struct nfs4_sequence_args *, struct nfs4_sequence_res *, int, int);
292 extern int nfs4_proc_setclientid(struct nfs_client *, u32, unsigned short, const struct cred *, struct nfs4_setclientid_res *);
293 extern int nfs4_proc_setclientid_confirm(struct nfs_client *, struct nfs4_setclientid_res *arg, const struct cred *);
294 extern int nfs4_proc_get_rootfh(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *, bool);
295 extern int nfs4_proc_bind_conn_to_session(struct nfs_client *, const struct cred *cred);
296 extern int nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred);
297 extern int nfs4_destroy_clientid(struct nfs_client *clp);
298 extern int nfs4_init_clientid(struct nfs_client *, const struct cred *);
299 extern int nfs41_init_clientid(struct nfs_client *, const struct cred *);
300 extern int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait);
301 extern int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle);
302 extern int nfs4_proc_fs_locations(struct rpc_clnt *, struct inode *, const struct qstr *,
303 struct nfs4_fs_locations *, struct page *);
304 extern int nfs4_proc_get_locations(struct inode *, struct nfs4_fs_locations *,
305 struct page *page, const struct cred *);
306 extern int nfs4_proc_fsid_present(struct inode *, const struct cred *);
307 extern struct rpc_clnt *nfs4_proc_lookup_mountpoint(struct inode *,
311 extern int nfs4_proc_secinfo(struct inode *, const struct qstr *, struct nfs4_secinfo_flavors *);
312 extern const struct xattr_handler *nfs4_xattr_handlers[];
313 extern int nfs4_set_rw_stateid(nfs4_stateid *stateid,
314 const struct nfs_open_context *ctx,
315 const struct nfs_lock_context *l_ctx,
317 extern int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
318 struct nfs_fattr *fattr, struct nfs4_label *label,
319 struct inode *inode);
320 extern int update_open_stateid(struct nfs4_state *state,
321 const nfs4_stateid *open_stateid,
322 const nfs4_stateid *deleg_stateid,
325 extern int nfs4_proc_get_lease_time(struct nfs_client *clp,
326 struct nfs_fsinfo *fsinfo);
327 #if defined(CONFIG_NFS_V4_1)
328 extern int nfs41_sequence_done(struct rpc_task *, struct nfs4_sequence_res *);
329 extern int nfs4_proc_create_session(struct nfs_client *, const struct cred *);
330 extern int nfs4_proc_destroy_session(struct nfs4_session *, const struct cred *);
331 extern int nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data,
333 extern int nfs4_detect_session_trunking(struct nfs_client *clp,
334 struct nfs41_exchange_id_res *res, struct rpc_xprt *xprt);
337 is_ds_only_client(struct nfs_client *clp)
339 return (clp->cl_exchange_flags & EXCHGID4_FLAG_MASK_PNFS) ==
340 EXCHGID4_FLAG_USE_PNFS_DS;
344 is_ds_client(struct nfs_client *clp)
346 return clp->cl_exchange_flags & EXCHGID4_FLAG_USE_PNFS_DS;
350 _nfs4_state_protect(struct nfs_client *clp, unsigned long sp4_mode,
351 struct rpc_clnt **clntp, struct rpc_message *msg)
353 rpc_authflavor_t flavor;
355 if (sp4_mode == NFS_SP4_MACH_CRED_CLEANUP ||
356 sp4_mode == NFS_SP4_MACH_CRED_PNFS_CLEANUP) {
357 /* Using machine creds for cleanup operations
358 * is only relevent if the client credentials
359 * might expire. So don't bother for
360 * RPC_AUTH_UNIX. If file was only exported to
361 * sec=sys, the PUTFH would fail anyway.
363 if ((*clntp)->cl_auth->au_flavor == RPC_AUTH_UNIX)
366 if (test_bit(sp4_mode, &clp->cl_sp4_flags)) {
367 msg->rpc_cred = rpc_machine_cred();
369 flavor = clp->cl_rpcclient->cl_auth->au_flavor;
370 WARN_ON_ONCE(flavor != RPC_AUTH_GSS_KRB5I &&
371 flavor != RPC_AUTH_GSS_KRB5P);
372 *clntp = clp->cl_rpcclient;
380 * Function responsible for determining if an rpc_message should use the
381 * machine cred under SP4_MACH_CRED and if so switching the credential and
382 * authflavor (using the nfs_client's rpc_clnt which will be krb5i/p).
383 * Should be called before rpc_call_sync/rpc_call_async.
386 nfs4_state_protect(struct nfs_client *clp, unsigned long sp4_mode,
387 struct rpc_clnt **clntp, struct rpc_message *msg)
389 _nfs4_state_protect(clp, sp4_mode, clntp, msg);
393 * Special wrapper to nfs4_state_protect for write.
394 * If WRITE can use machine cred but COMMIT cannot, make sure all writes
395 * that use machine cred use NFS_FILE_SYNC.
398 nfs4_state_protect_write(struct nfs_client *clp, struct rpc_clnt **clntp,
399 struct rpc_message *msg, struct nfs_pgio_header *hdr)
401 if (_nfs4_state_protect(clp, NFS_SP4_MACH_CRED_WRITE, clntp, msg) &&
402 !test_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags))
403 hdr->args.stable = NFS_FILE_SYNC;
405 #else /* CONFIG_NFS_v4_1 */
407 is_ds_only_client(struct nfs_client *clp)
413 is_ds_client(struct nfs_client *clp)
419 nfs4_state_protect(struct nfs_client *clp, unsigned long sp4_flags,
420 struct rpc_clnt **clntp, struct rpc_message *msg)
425 nfs4_state_protect_write(struct nfs_client *clp, struct rpc_clnt **clntp,
426 struct rpc_message *msg, struct nfs_pgio_header *hdr)
429 #endif /* CONFIG_NFS_V4_1 */
431 extern const struct nfs4_minor_version_ops *nfs_v4_minor_ops[];
433 extern const u32 nfs4_fattr_bitmap[3];
434 extern const u32 nfs4_statfs_bitmap[3];
435 extern const u32 nfs4_pathconf_bitmap[3];
436 extern const u32 nfs4_fsinfo_bitmap[3];
437 extern const u32 nfs4_fs_locations_bitmap[3];
439 void nfs40_shutdown_client(struct nfs_client *);
440 void nfs41_shutdown_client(struct nfs_client *);
441 int nfs40_init_client(struct nfs_client *);
442 int nfs41_init_client(struct nfs_client *);
443 void nfs4_free_client(struct nfs_client *);
445 struct nfs_client *nfs4_alloc_client(const struct nfs_client_initdata *);
448 extern void nfs4_schedule_state_renewal(struct nfs_client *);
449 extern void nfs4_renewd_prepare_shutdown(struct nfs_server *);
450 extern void nfs4_kill_renewd(struct nfs_client *);
451 extern void nfs4_renew_state(struct work_struct *);
452 extern void nfs4_set_lease_period(struct nfs_client *clp, unsigned long lease);
456 extern const nfs4_stateid current_stateid;
458 const struct cred *nfs4_get_clid_cred(struct nfs_client *clp);
459 const struct cred *nfs4_get_machine_cred(struct nfs_client *clp);
460 const struct cred *nfs4_get_renew_cred(struct nfs_client *clp);
461 int nfs4_discover_server_trunking(struct nfs_client *clp,
462 struct nfs_client **);
463 int nfs40_discover_server_trunking(struct nfs_client *clp,
464 struct nfs_client **, const struct cred *);
465 #if defined(CONFIG_NFS_V4_1)
466 int nfs41_discover_server_trunking(struct nfs_client *clp,
467 struct nfs_client **, const struct cred *);
468 extern void nfs4_schedule_session_recovery(struct nfs4_session *, int);
469 extern void nfs41_notify_server(struct nfs_client *);
470 bool nfs4_check_serverowner_major_id(struct nfs41_server_owner *o1,
471 struct nfs41_server_owner *o2);
473 static inline void nfs4_schedule_session_recovery(struct nfs4_session *session, int err)
476 #endif /* CONFIG_NFS_V4_1 */
478 extern struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *, const struct cred *, gfp_t);
479 extern void nfs4_put_state_owner(struct nfs4_state_owner *);
480 extern void nfs4_purge_state_owners(struct nfs_server *, struct list_head *);
481 extern void nfs4_free_state_owners(struct list_head *head);
482 extern struct nfs4_state * nfs4_get_open_state(struct inode *, struct nfs4_state_owner *);
483 extern void nfs4_put_open_state(struct nfs4_state *);
484 extern void nfs4_close_state(struct nfs4_state *, fmode_t);
485 extern void nfs4_close_sync(struct nfs4_state *, fmode_t);
486 extern void nfs4_state_set_mode_locked(struct nfs4_state *, fmode_t);
487 extern void nfs_inode_find_state_and_recover(struct inode *inode,
488 const nfs4_stateid *stateid);
489 extern int nfs4_state_mark_reclaim_nograce(struct nfs_client *, struct nfs4_state *);
490 extern void nfs4_schedule_lease_recovery(struct nfs_client *);
491 extern int nfs4_wait_clnt_recover(struct nfs_client *clp);
492 extern int nfs4_client_recover_expired_lease(struct nfs_client *clp);
493 extern void nfs4_schedule_state_manager(struct nfs_client *);
494 extern void nfs4_schedule_path_down_recovery(struct nfs_client *clp);
495 extern int nfs4_schedule_stateid_recovery(const struct nfs_server *, struct nfs4_state *);
496 extern int nfs4_schedule_migration_recovery(const struct nfs_server *);
497 extern void nfs4_schedule_lease_moved_recovery(struct nfs_client *);
498 extern void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags, bool);
499 extern void nfs41_handle_server_scope(struct nfs_client *,
500 struct nfs41_server_scope **);
501 extern void nfs4_put_lock_state(struct nfs4_lock_state *lsp);
502 extern int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl);
503 extern int nfs4_select_rw_stateid(struct nfs4_state *, fmode_t,
504 const struct nfs_lock_context *, nfs4_stateid *,
505 const struct cred **);
506 extern bool nfs4_copy_open_stateid(nfs4_stateid *dst,
507 struct nfs4_state *state);
509 extern struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask);
510 extern int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task);
511 extern void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid);
512 extern void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid);
513 extern void nfs_release_seqid(struct nfs_seqid *seqid);
514 extern void nfs_free_seqid(struct nfs_seqid *seqid);
515 extern int nfs4_setup_sequence(struct nfs_client *client,
516 struct nfs4_sequence_args *args,
517 struct nfs4_sequence_res *res,
518 struct rpc_task *task);
519 extern int nfs4_sequence_done(struct rpc_task *task,
520 struct nfs4_sequence_res *res);
522 extern void nfs4_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp);
523 extern int nfs4_proc_commit(struct file *dst, __u64 offset, __u32 count, struct nfs_commitres *res);
524 extern const nfs4_stateid zero_stateid;
525 extern const nfs4_stateid invalid_stateid;
528 struct nfs_mount_info;
529 extern struct nfs_subversion nfs_v4;
530 extern bool nfs4_disable_idmapping;
531 extern unsigned short max_session_slots;
532 extern unsigned short max_session_cb_slots;
533 extern unsigned short send_implementation_id;
534 extern bool recover_lost_locks;
536 #define NFS4_CLIENT_ID_UNIQ_LEN (64)
537 extern char nfs4_client_id_uniquifier[NFS4_CLIENT_ID_UNIQ_LEN];
539 extern int nfs4_try_get_tree(struct fs_context *);
540 extern int nfs4_get_referral_tree(struct fs_context *);
544 int nfs4_register_sysctl(void);
545 void nfs4_unregister_sysctl(void);
547 static inline int nfs4_register_sysctl(void)
552 static inline void nfs4_unregister_sysctl(void)
558 extern const struct rpc_procinfo nfs4_procedures[];
560 struct nfs4_mount_data;
563 extern const struct svc_version nfs4_callback_version1;
564 extern const struct svc_version nfs4_callback_version4;
566 static inline void nfs4_stateid_copy(nfs4_stateid *dst, const nfs4_stateid *src)
568 memcpy(dst->data, src->data, sizeof(dst->data));
569 dst->type = src->type;
572 static inline bool nfs4_stateid_match(const nfs4_stateid *dst, const nfs4_stateid *src)
574 if (dst->type != src->type)
576 return memcmp(dst->data, src->data, sizeof(dst->data)) == 0;
579 static inline bool nfs4_stateid_match_other(const nfs4_stateid *dst, const nfs4_stateid *src)
581 return memcmp(dst->other, src->other, NFS4_STATEID_OTHER_SIZE) == 0;
584 static inline bool nfs4_stateid_is_newer(const nfs4_stateid *s1, const nfs4_stateid *s2)
586 return (s32)(be32_to_cpu(s1->seqid) - be32_to_cpu(s2->seqid)) > 0;
589 static inline bool nfs4_stateid_match_or_older(const nfs4_stateid *dst, const nfs4_stateid *src)
591 return nfs4_stateid_match_other(dst, src) &&
592 !(src->seqid && nfs4_stateid_is_newer(dst, src));
595 static inline void nfs4_stateid_seqid_inc(nfs4_stateid *s1)
597 u32 seqid = be32_to_cpu(s1->seqid);
601 s1->seqid = cpu_to_be32(seqid);
604 static inline bool nfs4_valid_open_stateid(const struct nfs4_state *state)
606 return test_bit(NFS_STATE_RECOVERY_FAILED, &state->flags) == 0;
609 static inline bool nfs4_state_match_open_stateid_other(const struct nfs4_state *state,
610 const nfs4_stateid *stateid)
612 return test_bit(NFS_OPEN_STATE, &state->flags) &&
613 nfs4_stateid_match_other(&state->open_stateid, stateid);
618 #define nfs4_close_state(a, b) do { } while (0)
619 #define nfs4_close_sync(a, b) do { } while (0)
620 #define nfs4_state_protect(a, b, c, d) do { } while (0)
621 #define nfs4_state_protect_write(a, b, c, d) do { } while (0)
623 #endif /* CONFIG_NFS_V4 */
624 #endif /* __LINUX_FS_NFS_NFS4_FS.H */