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1/*
2 * linux/fs/nfs/nfs4_fs.h
3 *
4 * Copyright (C) 2005 Trond Myklebust
5 *
6 * NFSv4-specific filesystem definitions and declarations
7 */
8
9#ifndef __LINUX_FS_NFS_NFS4_FS_H
10#define __LINUX_FS_NFS_NFS4_FS_H
11
12#if defined(CONFIG_NFS_V4_2)
13#define NFS4_MAX_MINOR_VERSION 2
14#elif defined(CONFIG_NFS_V4_1)
15#define NFS4_MAX_MINOR_VERSION 1
16#else
17#define NFS4_MAX_MINOR_VERSION 0
18#endif
19
20#if IS_ENABLED(CONFIG_NFS_V4)
21
22#define NFS4_MAX_LOOP_ON_RECOVER (10)
23
24#include <linux/seqlock.h>
25
26struct idmap;
27
28enum nfs4_client_state {
29 NFS4CLNT_MANAGER_RUNNING = 0,
30 NFS4CLNT_CHECK_LEASE,
31 NFS4CLNT_LEASE_EXPIRED,
32 NFS4CLNT_RECLAIM_REBOOT,
33 NFS4CLNT_RECLAIM_NOGRACE,
34 NFS4CLNT_DELEGRETURN,
35 NFS4CLNT_SESSION_RESET,
36 NFS4CLNT_LEASE_CONFIRM,
37 NFS4CLNT_SERVER_SCOPE_MISMATCH,
38 NFS4CLNT_PURGE_STATE,
39 NFS4CLNT_BIND_CONN_TO_SESSION,
40 NFS4CLNT_MOVED,
41 NFS4CLNT_LEASE_MOVED,
42 NFS4CLNT_DELEGATION_EXPIRED,
43};
44
45#define NFS4_RENEW_TIMEOUT 0x01
46#define NFS4_RENEW_DELEGATION_CB 0x02
47
48struct nfs_seqid_counter;
49struct nfs4_minor_version_ops {
50 u32 minor_version;
51 unsigned init_caps;
52
53 int (*init_client)(struct nfs_client *);
54 void (*shutdown_client)(struct nfs_client *);
55 bool (*match_stateid)(const nfs4_stateid *,
56 const nfs4_stateid *);
57 int (*find_root_sec)(struct nfs_server *, struct nfs_fh *,
58 struct nfs_fsinfo *);
59 void (*free_lock_state)(struct nfs_server *,
60 struct nfs4_lock_state *);
61 int (*test_and_free_expired)(struct nfs_server *,
62 nfs4_stateid *, struct rpc_cred *);
63 struct nfs_seqid *
64 (*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
65 int (*session_trunk)(struct rpc_clnt *, struct rpc_xprt *, void *);
66 const struct rpc_call_ops *call_sync_ops;
67 const struct nfs4_state_recovery_ops *reboot_recovery_ops;
68 const struct nfs4_state_recovery_ops *nograce_recovery_ops;
69 const struct nfs4_state_maintenance_ops *state_renewal_ops;
70 const struct nfs4_mig_recovery_ops *mig_recovery_ops;
71};
72
73#define NFS_SEQID_CONFIRMED 1
74struct nfs_seqid_counter {
75 ktime_t create_time;
76 int owner_id;
77 int flags;
78 u32 counter;
79 spinlock_t lock; /* Protects the list */
80 struct list_head list; /* Defines sequence of RPC calls */
81 struct rpc_wait_queue wait; /* RPC call delay queue */
82};
83
84struct nfs_seqid {
85 struct nfs_seqid_counter *sequence;
86 struct list_head list;
87 struct rpc_task *task;
88};
89
90static inline void nfs_confirm_seqid(struct nfs_seqid_counter *seqid, int status)
91{
92 if (seqid_mutating_err(-status))
93 seqid->flags |= NFS_SEQID_CONFIRMED;
94}
95
96/*
97 * NFS4 state_owners and lock_owners are simply labels for ordered
98 * sequences of RPC calls. Their sole purpose is to provide once-only
99 * semantics by allowing the server to identify replayed requests.
100 */
101struct nfs4_state_owner {
102 struct nfs_server *so_server;
103 struct list_head so_lru;
104 unsigned long so_expires;
105 struct rb_node so_server_node;
106
107 struct rpc_cred *so_cred; /* Associated cred */
108
109 spinlock_t so_lock;
110 atomic_t so_count;
111 unsigned long so_flags;
112 struct list_head so_states;
113 struct nfs_seqid_counter so_seqid;
114 seqcount_t so_reclaim_seqcount;
115 struct mutex so_delegreturn_mutex;
116};
117
118enum {
119 NFS_OWNER_RECLAIM_REBOOT,
120 NFS_OWNER_RECLAIM_NOGRACE
121};
122
123#define NFS_LOCK_NEW 0
124#define NFS_LOCK_RECLAIM 1
125#define NFS_LOCK_EXPIRED 2
126
127/*
128 * struct nfs4_state maintains the client-side state for a given
129 * (state_owner,inode) tuple (OPEN) or state_owner (LOCK).
130 *
131 * OPEN:
132 * In order to know when to OPEN_DOWNGRADE or CLOSE the state on the server,
133 * we need to know how many files are open for reading or writing on a
134 * given inode. This information too is stored here.
135 *
136 * LOCK: one nfs4_state (LOCK) to hold the lock stateid nfs4_state(OPEN)
137 */
138
139struct nfs4_lock_state {
140 struct list_head ls_locks; /* Other lock stateids */
141 struct nfs4_state * ls_state; /* Pointer to open state */
142#define NFS_LOCK_INITIALIZED 0
143#define NFS_LOCK_LOST 1
144 unsigned long ls_flags;
145 struct nfs_seqid_counter ls_seqid;
146 nfs4_stateid ls_stateid;
147 atomic_t ls_count;
148 fl_owner_t ls_owner;
149};
150
151/* bits for nfs4_state->flags */
152enum {
153 LK_STATE_IN_USE,
154 NFS_DELEGATED_STATE, /* Current stateid is delegation */
155 NFS_OPEN_STATE, /* OPEN stateid is set */
156 NFS_O_RDONLY_STATE, /* OPEN stateid has read-only state */
157 NFS_O_WRONLY_STATE, /* OPEN stateid has write-only state */
158 NFS_O_RDWR_STATE, /* OPEN stateid has read/write state */
159 NFS_STATE_RECLAIM_REBOOT, /* OPEN stateid server rebooted */
160 NFS_STATE_RECLAIM_NOGRACE, /* OPEN stateid needs to recover state */
161 NFS_STATE_POSIX_LOCKS, /* Posix locks are supported */
162 NFS_STATE_RECOVERY_FAILED, /* OPEN stateid state recovery failed */
163 NFS_STATE_MAY_NOTIFY_LOCK, /* server may CB_NOTIFY_LOCK */
164};
165
166struct nfs4_state {
167 struct list_head open_states; /* List of states for the same state_owner */
168 struct list_head inode_states; /* List of states for the same inode */
169 struct list_head lock_states; /* List of subservient lock stateids */
170
171 struct nfs4_state_owner *owner; /* Pointer to the open owner */
172 struct inode *inode; /* Pointer to the inode */
173
174 unsigned long flags; /* Do we hold any locks? */
175 spinlock_t state_lock; /* Protects the lock_states list */
176
177 seqlock_t seqlock; /* Protects the stateid/open_stateid */
178 nfs4_stateid stateid; /* Current stateid: may be delegation */
179 nfs4_stateid open_stateid; /* OPEN stateid */
180
181 /* The following 3 fields are protected by owner->so_lock */
182 unsigned int n_rdonly; /* Number of read-only references */
183 unsigned int n_wronly; /* Number of write-only references */
184 unsigned int n_rdwr; /* Number of read/write references */
185 fmode_t state; /* State on the server (R,W, or RW) */
186 atomic_t count;
187};
188
189
190struct nfs4_exception {
191 struct nfs4_state *state;
192 struct inode *inode;
193 nfs4_stateid *stateid;
194 long timeout;
195 unsigned char delay : 1,
196 recovering : 1,
197 retry : 1;
198};
199
200struct nfs4_state_recovery_ops {
201 int owner_flag_bit;
202 int state_flag_bit;
203 int (*recover_open)(struct nfs4_state_owner *, struct nfs4_state *);
204 int (*recover_lock)(struct nfs4_state *, struct file_lock *);
205 int (*establish_clid)(struct nfs_client *, struct rpc_cred *);
206 int (*reclaim_complete)(struct nfs_client *, struct rpc_cred *);
207 int (*detect_trunking)(struct nfs_client *, struct nfs_client **,
208 struct rpc_cred *);
209};
210
211struct nfs4_add_xprt_data {
212 struct nfs_client *clp;
213 struct rpc_cred *cred;
214};
215
216struct nfs4_state_maintenance_ops {
217 int (*sched_state_renewal)(struct nfs_client *, struct rpc_cred *, unsigned);
218 struct rpc_cred * (*get_state_renewal_cred_locked)(struct nfs_client *);
219 int (*renew_lease)(struct nfs_client *, struct rpc_cred *);
220};
221
222struct nfs4_mig_recovery_ops {
223 int (*get_locations)(struct inode *, struct nfs4_fs_locations *,
224 struct page *, struct rpc_cred *);
225 int (*fsid_present)(struct inode *, struct rpc_cred *);
226};
227
228extern const struct dentry_operations nfs4_dentry_operations;
229
230/* dir.c */
231int nfs_atomic_open(struct inode *, struct dentry *, struct file *,
232 unsigned, umode_t, int *);
233
234/* super.c */
235extern struct file_system_type nfs4_fs_type;
236
237/* nfs4namespace.c */
238struct rpc_clnt *nfs4_negotiate_security(struct rpc_clnt *, struct inode *,
239 const struct qstr *);
240struct vfsmount *nfs4_submount(struct nfs_server *, struct dentry *,
241 struct nfs_fh *, struct nfs_fattr *);
242int nfs4_replace_transport(struct nfs_server *server,
243 const struct nfs4_fs_locations *locations);
244
245/* nfs4proc.c */
246extern int nfs4_handle_exception(struct nfs_server *, int, struct nfs4_exception *);
247extern int nfs4_call_sync(struct rpc_clnt *, struct nfs_server *,
248 struct rpc_message *, struct nfs4_sequence_args *,
249 struct nfs4_sequence_res *, int);
250extern void nfs4_init_sequence(struct nfs4_sequence_args *, struct nfs4_sequence_res *, int);
251extern int nfs4_proc_setclientid(struct nfs_client *, u32, unsigned short, struct rpc_cred *, struct nfs4_setclientid_res *);
252extern int nfs4_proc_setclientid_confirm(struct nfs_client *, struct nfs4_setclientid_res *arg, struct rpc_cred *);
253extern int nfs4_proc_get_rootfh(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *, bool);
254extern int nfs4_proc_bind_conn_to_session(struct nfs_client *, struct rpc_cred *cred);
255extern int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred);
256extern int nfs4_destroy_clientid(struct nfs_client *clp);
257extern int nfs4_init_clientid(struct nfs_client *, struct rpc_cred *);
258extern int nfs41_init_clientid(struct nfs_client *, struct rpc_cred *);
259extern int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait);
260extern int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle);
261extern int nfs4_proc_fs_locations(struct rpc_clnt *, struct inode *, const struct qstr *,
262 struct nfs4_fs_locations *, struct page *);
263extern int nfs4_proc_get_locations(struct inode *, struct nfs4_fs_locations *,
264 struct page *page, struct rpc_cred *);
265extern int nfs4_proc_fsid_present(struct inode *, struct rpc_cred *);
266extern struct rpc_clnt *nfs4_proc_lookup_mountpoint(struct inode *, const struct qstr *,
267 struct nfs_fh *, struct nfs_fattr *);
268extern int nfs4_proc_secinfo(struct inode *, const struct qstr *, struct nfs4_secinfo_flavors *);
269extern const struct xattr_handler *nfs4_xattr_handlers[];
270extern int nfs4_set_rw_stateid(nfs4_stateid *stateid,
271 const struct nfs_open_context *ctx,
272 const struct nfs_lock_context *l_ctx,
273 fmode_t fmode);
274
275#if defined(CONFIG_NFS_V4_1)
276extern int nfs41_sequence_done(struct rpc_task *, struct nfs4_sequence_res *);
277extern int nfs4_proc_create_session(struct nfs_client *, struct rpc_cred *);
278extern int nfs4_proc_destroy_session(struct nfs4_session *, struct rpc_cred *);
279extern int nfs4_proc_get_lease_time(struct nfs_client *clp,
280 struct nfs_fsinfo *fsinfo);
281extern int nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data,
282 bool sync);
283extern int nfs4_detect_session_trunking(struct nfs_client *clp,
284 struct nfs41_exchange_id_res *res, struct rpc_xprt *xprt);
285
286static inline bool
287is_ds_only_client(struct nfs_client *clp)
288{
289 return (clp->cl_exchange_flags & EXCHGID4_FLAG_MASK_PNFS) ==
290 EXCHGID4_FLAG_USE_PNFS_DS;
291}
292
293static inline bool
294is_ds_client(struct nfs_client *clp)
295{
296 return clp->cl_exchange_flags & EXCHGID4_FLAG_USE_PNFS_DS;
297}
298
299static inline bool
300_nfs4_state_protect(struct nfs_client *clp, unsigned long sp4_mode,
301 struct rpc_clnt **clntp, struct rpc_message *msg)
302{
303 struct rpc_cred *newcred = NULL;
304 rpc_authflavor_t flavor;
305
306 if (test_bit(sp4_mode, &clp->cl_sp4_flags)) {
307 spin_lock(&clp->cl_lock);
308 if (clp->cl_machine_cred != NULL)
309 /* don't call get_rpccred on the machine cred -
310 * a reference will be held for life of clp */
311 newcred = clp->cl_machine_cred;
312 spin_unlock(&clp->cl_lock);
313 msg->rpc_cred = newcred;
314
315 flavor = clp->cl_rpcclient->cl_auth->au_flavor;
316 WARN_ON_ONCE(flavor != RPC_AUTH_GSS_KRB5I &&
317 flavor != RPC_AUTH_GSS_KRB5P);
318 *clntp = clp->cl_rpcclient;
319
320 return true;
321 }
322 return false;
323}
324
325/*
326 * Function responsible for determining if an rpc_message should use the
327 * machine cred under SP4_MACH_CRED and if so switching the credential and
328 * authflavor (using the nfs_client's rpc_clnt which will be krb5i/p).
329 * Should be called before rpc_call_sync/rpc_call_async.
330 */
331static inline void
332nfs4_state_protect(struct nfs_client *clp, unsigned long sp4_mode,
333 struct rpc_clnt **clntp, struct rpc_message *msg)
334{
335 _nfs4_state_protect(clp, sp4_mode, clntp, msg);
336}
337
338/*
339 * Special wrapper to nfs4_state_protect for write.
340 * If WRITE can use machine cred but COMMIT cannot, make sure all writes
341 * that use machine cred use NFS_FILE_SYNC.
342 */
343static inline void
344nfs4_state_protect_write(struct nfs_client *clp, struct rpc_clnt **clntp,
345 struct rpc_message *msg, struct nfs_pgio_header *hdr)
346{
347 if (_nfs4_state_protect(clp, NFS_SP4_MACH_CRED_WRITE, clntp, msg) &&
348 !test_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags))
349 hdr->args.stable = NFS_FILE_SYNC;
350}
351#else /* CONFIG_NFS_v4_1 */
352static inline bool
353is_ds_only_client(struct nfs_client *clp)
354{
355 return false;
356}
357
358static inline bool
359is_ds_client(struct nfs_client *clp)
360{
361 return false;
362}
363
364static inline void
365nfs4_state_protect(struct nfs_client *clp, unsigned long sp4_flags,
366 struct rpc_clnt **clntp, struct rpc_message *msg)
367{
368}
369
370static inline void
371nfs4_state_protect_write(struct nfs_client *clp, struct rpc_clnt **clntp,
372 struct rpc_message *msg, struct nfs_pgio_header *hdr)
373{
374}
375#endif /* CONFIG_NFS_V4_1 */
376
377extern const struct nfs4_minor_version_ops *nfs_v4_minor_ops[];
378
379extern const u32 nfs4_fattr_bitmap[3];
380extern const u32 nfs4_statfs_bitmap[3];
381extern const u32 nfs4_pathconf_bitmap[3];
382extern const u32 nfs4_fsinfo_bitmap[3];
383extern const u32 nfs4_fs_locations_bitmap[3];
384
385void nfs40_shutdown_client(struct nfs_client *);
386void nfs41_shutdown_client(struct nfs_client *);
387int nfs40_init_client(struct nfs_client *);
388int nfs41_init_client(struct nfs_client *);
389void nfs4_free_client(struct nfs_client *);
390
391struct nfs_client *nfs4_alloc_client(const struct nfs_client_initdata *);
392
393/* nfs4renewd.c */
394extern void nfs4_schedule_state_renewal(struct nfs_client *);
395extern void nfs4_renewd_prepare_shutdown(struct nfs_server *);
396extern void nfs4_kill_renewd(struct nfs_client *);
397extern void nfs4_renew_state(struct work_struct *);
398extern void nfs4_set_lease_period(struct nfs_client *clp,
399 unsigned long lease,
400 unsigned long lastrenewed);
401
402
403/* nfs4state.c */
404struct rpc_cred *nfs4_get_clid_cred(struct nfs_client *clp);
405struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp);
406struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp);
407int nfs4_discover_server_trunking(struct nfs_client *clp,
408 struct nfs_client **);
409int nfs40_discover_server_trunking(struct nfs_client *clp,
410 struct nfs_client **, struct rpc_cred *);
411#if defined(CONFIG_NFS_V4_1)
412int nfs41_discover_server_trunking(struct nfs_client *clp,
413 struct nfs_client **, struct rpc_cred *);
414extern void nfs4_schedule_session_recovery(struct nfs4_session *, int);
415extern void nfs41_notify_server(struct nfs_client *);
416#else
417static inline void nfs4_schedule_session_recovery(struct nfs4_session *session, int err)
418{
419}
420#endif /* CONFIG_NFS_V4_1 */
421
422extern struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *, struct rpc_cred *, gfp_t);
423extern void nfs4_put_state_owner(struct nfs4_state_owner *);
424extern void nfs4_purge_state_owners(struct nfs_server *);
425extern struct nfs4_state * nfs4_get_open_state(struct inode *, struct nfs4_state_owner *);
426extern void nfs4_put_open_state(struct nfs4_state *);
427extern void nfs4_close_state(struct nfs4_state *, fmode_t);
428extern void nfs4_close_sync(struct nfs4_state *, fmode_t);
429extern void nfs4_state_set_mode_locked(struct nfs4_state *, fmode_t);
430extern void nfs_inode_find_state_and_recover(struct inode *inode,
431 const nfs4_stateid *stateid);
432extern int nfs4_state_mark_reclaim_nograce(struct nfs_client *, struct nfs4_state *);
433extern void nfs4_schedule_lease_recovery(struct nfs_client *);
434extern int nfs4_wait_clnt_recover(struct nfs_client *clp);
435extern int nfs4_client_recover_expired_lease(struct nfs_client *clp);
436extern void nfs4_schedule_state_manager(struct nfs_client *);
437extern void nfs4_schedule_path_down_recovery(struct nfs_client *clp);
438extern int nfs4_schedule_stateid_recovery(const struct nfs_server *, struct nfs4_state *);
439extern int nfs4_schedule_migration_recovery(const struct nfs_server *);
440extern void nfs4_schedule_lease_moved_recovery(struct nfs_client *);
441extern void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags, bool);
442extern void nfs41_handle_server_scope(struct nfs_client *,
443 struct nfs41_server_scope **);
444extern void nfs4_put_lock_state(struct nfs4_lock_state *lsp);
445extern int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl);
446extern int nfs4_select_rw_stateid(struct nfs4_state *, fmode_t,
447 const struct nfs_lock_context *, nfs4_stateid *,
448 struct rpc_cred **);
449
450extern struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask);
451extern int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task);
452extern void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid);
453extern void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid);
454extern void nfs_release_seqid(struct nfs_seqid *seqid);
455extern void nfs_free_seqid(struct nfs_seqid *seqid);
456extern int nfs4_setup_sequence(const struct nfs_client *client,
457 struct nfs4_sequence_args *args,
458 struct nfs4_sequence_res *res,
459 struct rpc_task *task);
460extern int nfs4_sequence_done(struct rpc_task *task,
461 struct nfs4_sequence_res *res);
462
463extern void nfs4_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp);
464
465extern const nfs4_stateid zero_stateid;
466
467/* nfs4super.c */
468struct nfs_mount_info;
469extern struct nfs_subversion nfs_v4;
470struct dentry *nfs4_try_mount(int, const char *, struct nfs_mount_info *, struct nfs_subversion *);
471extern bool nfs4_disable_idmapping;
472extern unsigned short max_session_slots;
473extern unsigned short max_session_cb_slots;
474extern unsigned short send_implementation_id;
475extern bool recover_lost_locks;
476
477#define NFS4_CLIENT_ID_UNIQ_LEN (64)
478extern char nfs4_client_id_uniquifier[NFS4_CLIENT_ID_UNIQ_LEN];
479
480/* nfs4sysctl.c */
481#ifdef CONFIG_SYSCTL
482int nfs4_register_sysctl(void);
483void nfs4_unregister_sysctl(void);
484#else
485static inline int nfs4_register_sysctl(void)
486{
487 return 0;
488}
489
490static inline void nfs4_unregister_sysctl(void)
491{
492}
493#endif
494
495/* nfs4xdr.c */
496extern struct rpc_procinfo nfs4_procedures[];
497
498struct nfs4_mount_data;
499
500/* callback_xdr.c */
501extern struct svc_version nfs4_callback_version1;
502extern struct svc_version nfs4_callback_version4;
503
504static inline void nfs4_stateid_copy(nfs4_stateid *dst, const nfs4_stateid *src)
505{
506 memcpy(dst->data, src->data, sizeof(dst->data));
507 dst->type = src->type;
508}
509
510static inline bool nfs4_stateid_match(const nfs4_stateid *dst, const nfs4_stateid *src)
511{
512 if (dst->type != src->type)
513 return false;
514 return memcmp(dst->data, src->data, sizeof(dst->data)) == 0;
515}
516
517static inline bool nfs4_stateid_match_other(const nfs4_stateid *dst, const nfs4_stateid *src)
518{
519 return memcmp(dst->other, src->other, NFS4_STATEID_OTHER_SIZE) == 0;
520}
521
522static inline bool nfs4_stateid_is_newer(const nfs4_stateid *s1, const nfs4_stateid *s2)
523{
524 return (s32)(be32_to_cpu(s1->seqid) - be32_to_cpu(s2->seqid)) > 0;
525}
526
527static inline bool nfs4_valid_open_stateid(const struct nfs4_state *state)
528{
529 return test_bit(NFS_STATE_RECOVERY_FAILED, &state->flags) == 0;
530}
531
532static inline bool nfs4_state_match_open_stateid_other(const struct nfs4_state *state,
533 const nfs4_stateid *stateid)
534{
535 return test_bit(NFS_OPEN_STATE, &state->flags) &&
536 nfs4_stateid_match_other(&state->open_stateid, stateid);
537}
538
539#else
540
541#define nfs4_close_state(a, b) do { } while (0)
542#define nfs4_close_sync(a, b) do { } while (0)
543#define nfs4_state_protect(a, b, c, d) do { } while (0)
544#define nfs4_state_protect_write(a, b, c, d) do { } while (0)
545
546#endif /* CONFIG_NFS_V4 */
547#endif /* __LINUX_FS_NFS_NFS4_FS.H */