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10#ifndef __LINUX_FS_NFS_NFS4_FS_H
11#define __LINUX_FS_NFS_NFS4_FS_H
12
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
17#else
18#define NFS4_MAX_MINOR_VERSION 0
19#endif
20
21#if IS_ENABLED(CONFIG_NFS_V4)
22
23#define NFS4_MAX_LOOP_ON_RECOVER (10)
24
25#include <linux/seqlock.h>
26
27struct idmap;
28
29enum nfs4_client_state {
30 NFS4CLNT_MANAGER_RUNNING = 0,
31 NFS4CLNT_CHECK_LEASE,
32 NFS4CLNT_LEASE_EXPIRED,
33 NFS4CLNT_RECLAIM_REBOOT,
34 NFS4CLNT_RECLAIM_NOGRACE,
35 NFS4CLNT_DELEGRETURN,
36 NFS4CLNT_SESSION_RESET,
37 NFS4CLNT_LEASE_CONFIRM,
38 NFS4CLNT_SERVER_SCOPE_MISMATCH,
39 NFS4CLNT_PURGE_STATE,
40 NFS4CLNT_BIND_CONN_TO_SESSION,
41 NFS4CLNT_MOVED,
42 NFS4CLNT_LEASE_MOVED,
43 NFS4CLNT_DELEGATION_EXPIRED,
44 NFS4CLNT_RUN_MANAGER,
45 NFS4CLNT_RECALL_RUNNING,
46 NFS4CLNT_RECALL_ANY_LAYOUT_READ,
47 NFS4CLNT_RECALL_ANY_LAYOUT_RW,
48};
49
50#define NFS4_RENEW_TIMEOUT 0x01
51#define NFS4_RENEW_DELEGATION_CB 0x02
52
53struct nfs_seqid_counter;
54struct nfs4_minor_version_ops {
55 u32 minor_version;
56 unsigned init_caps;
57
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 *,
63 struct nfs_fsinfo *);
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 *);
68 struct nfs_seqid *
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;
77};
78
79#define NFS_SEQID_CONFIRMED 1
80struct nfs_seqid_counter {
81 ktime_t create_time;
82 int owner_id;
83 int flags;
84 u32 counter;
85 spinlock_t lock;
86 struct list_head list;
87 struct rpc_wait_queue wait;
88};
89
90struct nfs_seqid {
91 struct nfs_seqid_counter *sequence;
92 struct list_head list;
93 struct rpc_task *task;
94};
95
96static inline void nfs_confirm_seqid(struct nfs_seqid_counter *seqid, int status)
97{
98 if (seqid_mutating_err(-status))
99 seqid->flags |= NFS_SEQID_CONFIRMED;
100}
101
102
103
104
105
106
107struct 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;
112
113 const struct cred *so_cred;
114
115 spinlock_t so_lock;
116 atomic_t so_count;
117 unsigned long so_flags;
118 struct list_head so_states;
119 struct nfs_seqid_counter so_seqid;
120 seqcount_spinlock_t so_reclaim_seqcount;
121 struct mutex so_delegreturn_mutex;
122};
123
124enum {
125 NFS_OWNER_RECLAIM_REBOOT,
126 NFS_OWNER_RECLAIM_NOGRACE
127};
128
129#define NFS_LOCK_NEW 0
130#define NFS_LOCK_RECLAIM 1
131#define NFS_LOCK_EXPIRED 2
132
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134
135
136
137
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139
140
141
142
143
144
145struct nfs4_lock_state {
146 struct list_head ls_locks;
147 struct nfs4_state * ls_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;
153 refcount_t ls_count;
154 fl_owner_t ls_owner;
155};
156
157
158enum {
159 LK_STATE_IN_USE,
160 NFS_DELEGATED_STATE,
161 NFS_OPEN_STATE,
162 NFS_O_RDONLY_STATE,
163 NFS_O_WRONLY_STATE,
164 NFS_O_RDWR_STATE,
165 NFS_STATE_RECLAIM_REBOOT,
166 NFS_STATE_RECLAIM_NOGRACE,
167 NFS_STATE_POSIX_LOCKS,
168 NFS_STATE_RECOVERY_FAILED,
169 NFS_STATE_MAY_NOTIFY_LOCK,
170 NFS_STATE_CHANGE_WAIT,
171 NFS_CLNT_DST_SSC_COPY_STATE,
172 NFS_CLNT_SRC_SSC_COPY_STATE,
173 NFS_SRV_SSC_COPY_STATE,
174};
175
176struct nfs4_state {
177 struct list_head open_states;
178 struct list_head inode_states;
179 struct list_head lock_states;
180
181 struct nfs4_state_owner *owner;
182 struct inode *inode;
183
184 unsigned long flags;
185 spinlock_t state_lock;
186
187 seqlock_t seqlock;
188 nfs4_stateid stateid;
189 nfs4_stateid open_stateid;
190
191
192 unsigned int n_rdonly;
193 unsigned int n_wronly;
194 unsigned int n_rdwr;
195 fmode_t state;
196 refcount_t count;
197
198 wait_queue_head_t waitq;
199 struct rcu_head rcu_head;
200};
201
202
203struct nfs4_exception {
204 struct nfs4_state *state;
205 struct inode *inode;
206 nfs4_stateid *stateid;
207 long timeout;
208 unsigned char delay : 1,
209 recovering : 1,
210 retry : 1;
211 bool interruptible;
212};
213
214struct nfs4_state_recovery_ops {
215 int owner_flag_bit;
216 int state_flag_bit;
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 *);
223};
224
225struct nfs4_opendata {
226 struct kref kref;
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;
236 struct dentry *dir;
237 struct dentry *dentry;
238 struct nfs4_state_owner *owner;
239 struct nfs4_state *state;
240 struct iattr attrs;
241 struct nfs4_layoutget *lgp;
242 unsigned long timestamp;
243 bool rpc_done;
244 bool file_created;
245 bool is_recover;
246 bool cancelled;
247 int rpc_status;
248};
249
250struct nfs4_add_xprt_data {
251 struct nfs_client *clp;
252 const struct cred *cred;
253};
254
255struct 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 *);
259};
260
261struct 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 *);
265};
266
267extern const struct dentry_operations nfs4_dentry_operations;
268
269
270int nfs_atomic_open(struct inode *, struct dentry *, struct file *,
271 unsigned, umode_t);
272
273
274extern struct file_system_type nfs4_fs_type;
275
276
277struct rpc_clnt *nfs4_negotiate_security(struct rpc_clnt *, struct inode *,
278 const struct qstr *);
279int nfs4_submount(struct fs_context *, struct nfs_server *);
280int nfs4_replace_transport(struct nfs_server *server,
281 const struct nfs4_fs_locations *locations);
282
283
284extern int nfs4_handle_exception(struct nfs_server *, int, struct nfs4_exception *);
285extern int nfs4_async_handle_error(struct rpc_task *task,
286 struct nfs_server *server,
287 struct nfs4_state *state, long *timeout);
288extern int nfs4_call_sync(struct rpc_clnt *, struct nfs_server *,
289 struct rpc_message *, struct nfs4_sequence_args *,
290 struct nfs4_sequence_res *, int);
291extern void nfs4_init_sequence(struct nfs4_sequence_args *, struct nfs4_sequence_res *, int, int);
292extern int nfs4_proc_setclientid(struct nfs_client *, u32, unsigned short, const struct cred *, struct nfs4_setclientid_res *);
293extern int nfs4_proc_setclientid_confirm(struct nfs_client *, struct nfs4_setclientid_res *arg, const struct cred *);
294extern int nfs4_proc_get_rootfh(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *, bool);
295extern int nfs4_proc_bind_conn_to_session(struct nfs_client *, const struct cred *cred);
296extern int nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred);
297extern int nfs4_destroy_clientid(struct nfs_client *clp);
298extern int nfs4_init_clientid(struct nfs_client *, const struct cred *);
299extern int nfs41_init_clientid(struct nfs_client *, const struct cred *);
300extern int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait);
301extern int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle);
302extern int nfs4_proc_fs_locations(struct rpc_clnt *, struct inode *, const struct qstr *,
303 struct nfs4_fs_locations *, struct page *);
304extern int nfs4_proc_get_locations(struct inode *, struct nfs4_fs_locations *,
305 struct page *page, const struct cred *);
306extern int nfs4_proc_fsid_present(struct inode *, const struct cred *);
307extern struct rpc_clnt *nfs4_proc_lookup_mountpoint(struct inode *,
308 struct dentry *,
309 struct nfs_fh *,
310 struct nfs_fattr *);
311extern int nfs4_proc_secinfo(struct inode *, const struct qstr *, struct nfs4_secinfo_flavors *);
312extern const struct xattr_handler *nfs4_xattr_handlers[];
313extern int nfs4_set_rw_stateid(nfs4_stateid *stateid,
314 const struct nfs_open_context *ctx,
315 const struct nfs_lock_context *l_ctx,
316 fmode_t fmode);
317extern 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);
320extern int update_open_stateid(struct nfs4_state *state,
321 const nfs4_stateid *open_stateid,
322 const nfs4_stateid *deleg_stateid,
323 fmode_t fmode);
324
325extern int nfs4_proc_get_lease_time(struct nfs_client *clp,
326 struct nfs_fsinfo *fsinfo);
327extern void nfs4_update_changeattr(struct inode *dir,
328 struct nfs4_change_info *cinfo,
329 unsigned long timestamp,
330 unsigned long cache_validity);
331extern int nfs4_buf_to_pages_noslab(const void *buf, size_t buflen,
332 struct page **pages);
333
334#if defined(CONFIG_NFS_V4_1)
335extern int nfs41_sequence_done(struct rpc_task *, struct nfs4_sequence_res *);
336extern int nfs4_proc_create_session(struct nfs_client *, const struct cred *);
337extern int nfs4_proc_destroy_session(struct nfs4_session *, const struct cred *);
338extern int nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data,
339 bool sync);
340extern int nfs4_detect_session_trunking(struct nfs_client *clp,
341 struct nfs41_exchange_id_res *res, struct rpc_xprt *xprt);
342
343static inline bool
344is_ds_only_client(struct nfs_client *clp)
345{
346 return (clp->cl_exchange_flags & EXCHGID4_FLAG_MASK_PNFS) ==
347 EXCHGID4_FLAG_USE_PNFS_DS;
348}
349
350static inline bool
351is_ds_client(struct nfs_client *clp)
352{
353 return clp->cl_exchange_flags & EXCHGID4_FLAG_USE_PNFS_DS;
354}
355
356static inline bool
357_nfs4_state_protect(struct nfs_client *clp, unsigned long sp4_mode,
358 struct rpc_clnt **clntp, struct rpc_message *msg)
359{
360 rpc_authflavor_t flavor;
361
362 if (sp4_mode == NFS_SP4_MACH_CRED_CLEANUP ||
363 sp4_mode == NFS_SP4_MACH_CRED_PNFS_CLEANUP) {
364
365
366
367
368
369
370 if ((*clntp)->cl_auth->au_flavor == RPC_AUTH_UNIX)
371 return false;
372 }
373 if (test_bit(sp4_mode, &clp->cl_sp4_flags)) {
374 msg->rpc_cred = rpc_machine_cred();
375
376 flavor = clp->cl_rpcclient->cl_auth->au_flavor;
377 WARN_ON_ONCE(flavor != RPC_AUTH_GSS_KRB5I &&
378 flavor != RPC_AUTH_GSS_KRB5P);
379 *clntp = clp->cl_rpcclient;
380
381 return true;
382 }
383 return false;
384}
385
386
387
388
389
390
391
392static inline void
393nfs4_state_protect(struct nfs_client *clp, unsigned long sp4_mode,
394 struct rpc_clnt **clntp, struct rpc_message *msg)
395{
396 _nfs4_state_protect(clp, sp4_mode, clntp, msg);
397}
398
399
400
401
402
403
404static inline void
405nfs4_state_protect_write(struct nfs_client *clp, struct rpc_clnt **clntp,
406 struct rpc_message *msg, struct nfs_pgio_header *hdr)
407{
408 if (_nfs4_state_protect(clp, NFS_SP4_MACH_CRED_WRITE, clntp, msg) &&
409 !test_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags))
410 hdr->args.stable = NFS_FILE_SYNC;
411}
412#else
413static inline bool
414is_ds_only_client(struct nfs_client *clp)
415{
416 return false;
417}
418
419static inline bool
420is_ds_client(struct nfs_client *clp)
421{
422 return false;
423}
424
425static inline void
426nfs4_state_protect(struct nfs_client *clp, unsigned long sp4_flags,
427 struct rpc_clnt **clntp, struct rpc_message *msg)
428{
429}
430
431static inline void
432nfs4_state_protect_write(struct nfs_client *clp, struct rpc_clnt **clntp,
433 struct rpc_message *msg, struct nfs_pgio_header *hdr)
434{
435}
436#endif
437
438extern const struct nfs4_minor_version_ops *nfs_v4_minor_ops[];
439
440extern const u32 nfs4_fattr_bitmap[3];
441extern const u32 nfs4_statfs_bitmap[3];
442extern const u32 nfs4_pathconf_bitmap[3];
443extern const u32 nfs4_fsinfo_bitmap[3];
444extern const u32 nfs4_fs_locations_bitmap[3];
445
446void nfs40_shutdown_client(struct nfs_client *);
447void nfs41_shutdown_client(struct nfs_client *);
448int nfs40_init_client(struct nfs_client *);
449int nfs41_init_client(struct nfs_client *);
450void nfs4_free_client(struct nfs_client *);
451
452struct nfs_client *nfs4_alloc_client(const struct nfs_client_initdata *);
453
454
455extern void nfs4_schedule_state_renewal(struct nfs_client *);
456extern void nfs4_renewd_prepare_shutdown(struct nfs_server *);
457extern void nfs4_kill_renewd(struct nfs_client *);
458extern void nfs4_renew_state(struct work_struct *);
459extern void nfs4_set_lease_period(struct nfs_client *clp, unsigned long lease);
460
461
462
463extern const nfs4_stateid current_stateid;
464
465const struct cred *nfs4_get_clid_cred(struct nfs_client *clp);
466const struct cred *nfs4_get_machine_cred(struct nfs_client *clp);
467const struct cred *nfs4_get_renew_cred(struct nfs_client *clp);
468int nfs4_discover_server_trunking(struct nfs_client *clp,
469 struct nfs_client **);
470int nfs40_discover_server_trunking(struct nfs_client *clp,
471 struct nfs_client **, const struct cred *);
472#if defined(CONFIG_NFS_V4_1)
473int nfs41_discover_server_trunking(struct nfs_client *clp,
474 struct nfs_client **, const struct cred *);
475extern void nfs4_schedule_session_recovery(struct nfs4_session *, int);
476extern void nfs41_notify_server(struct nfs_client *);
477bool nfs4_check_serverowner_major_id(struct nfs41_server_owner *o1,
478 struct nfs41_server_owner *o2);
479#else
480static inline void nfs4_schedule_session_recovery(struct nfs4_session *session, int err)
481{
482}
483#endif
484
485extern struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *, const struct cred *, gfp_t);
486extern void nfs4_put_state_owner(struct nfs4_state_owner *);
487extern void nfs4_purge_state_owners(struct nfs_server *, struct list_head *);
488extern void nfs4_free_state_owners(struct list_head *head);
489extern struct nfs4_state * nfs4_get_open_state(struct inode *, struct nfs4_state_owner *);
490extern void nfs4_put_open_state(struct nfs4_state *);
491extern void nfs4_close_state(struct nfs4_state *, fmode_t);
492extern void nfs4_close_sync(struct nfs4_state *, fmode_t);
493extern void nfs4_state_set_mode_locked(struct nfs4_state *, fmode_t);
494extern void nfs_inode_find_state_and_recover(struct inode *inode,
495 const nfs4_stateid *stateid);
496extern int nfs4_state_mark_reclaim_nograce(struct nfs_client *, struct nfs4_state *);
497extern void nfs4_schedule_lease_recovery(struct nfs_client *);
498extern int nfs4_wait_clnt_recover(struct nfs_client *clp);
499extern int nfs4_client_recover_expired_lease(struct nfs_client *clp);
500extern void nfs4_schedule_state_manager(struct nfs_client *);
501extern void nfs4_schedule_path_down_recovery(struct nfs_client *clp);
502extern int nfs4_schedule_stateid_recovery(const struct nfs_server *, struct nfs4_state *);
503extern int nfs4_schedule_migration_recovery(const struct nfs_server *);
504extern void nfs4_schedule_lease_moved_recovery(struct nfs_client *);
505extern void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags, bool);
506extern void nfs41_handle_server_scope(struct nfs_client *,
507 struct nfs41_server_scope **);
508extern void nfs4_put_lock_state(struct nfs4_lock_state *lsp);
509extern int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl);
510extern int nfs4_select_rw_stateid(struct nfs4_state *, fmode_t,
511 const struct nfs_lock_context *, nfs4_stateid *,
512 const struct cred **);
513extern bool nfs4_copy_open_stateid(nfs4_stateid *dst,
514 struct nfs4_state *state);
515
516extern struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask);
517extern int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task);
518extern void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid);
519extern void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid);
520extern void nfs_release_seqid(struct nfs_seqid *seqid);
521extern void nfs_free_seqid(struct nfs_seqid *seqid);
522extern int nfs4_setup_sequence(struct nfs_client *client,
523 struct nfs4_sequence_args *args,
524 struct nfs4_sequence_res *res,
525 struct rpc_task *task);
526extern int nfs4_sequence_done(struct rpc_task *task,
527 struct nfs4_sequence_res *res);
528
529extern void nfs4_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp);
530extern int nfs4_proc_commit(struct file *dst, __u64 offset, __u32 count, struct nfs_commitres *res);
531extern const nfs4_stateid zero_stateid;
532extern const nfs4_stateid invalid_stateid;
533
534
535struct nfs_mount_info;
536extern struct nfs_subversion nfs_v4;
537extern bool nfs4_disable_idmapping;
538extern unsigned short max_session_slots;
539extern unsigned short max_session_cb_slots;
540extern unsigned short send_implementation_id;
541extern bool recover_lost_locks;
542
543#define NFS4_CLIENT_ID_UNIQ_LEN (64)
544extern char nfs4_client_id_uniquifier[NFS4_CLIENT_ID_UNIQ_LEN];
545
546extern int nfs4_try_get_tree(struct fs_context *);
547extern int nfs4_get_referral_tree(struct fs_context *);
548
549
550#ifdef CONFIG_SYSCTL
551int nfs4_register_sysctl(void);
552void nfs4_unregister_sysctl(void);
553#else
554static inline int nfs4_register_sysctl(void)
555{
556 return 0;
557}
558
559static inline void nfs4_unregister_sysctl(void)
560{
561}
562#endif
563
564
565extern const struct rpc_procinfo nfs4_procedures[];
566
567#ifdef CONFIG_NFS_V4_2
568extern const u32 nfs42_maxsetxattr_overhead;
569extern const u32 nfs42_maxgetxattr_overhead;
570extern const u32 nfs42_maxlistxattrs_overhead;
571#endif
572
573struct nfs4_mount_data;
574
575
576extern const struct svc_version nfs4_callback_version1;
577extern const struct svc_version nfs4_callback_version4;
578
579static inline void nfs4_stateid_copy(nfs4_stateid *dst, const nfs4_stateid *src)
580{
581 memcpy(dst->data, src->data, sizeof(dst->data));
582 dst->type = src->type;
583}
584
585static inline bool nfs4_stateid_match(const nfs4_stateid *dst, const nfs4_stateid *src)
586{
587 if (dst->type != src->type)
588 return false;
589 return memcmp(dst->data, src->data, sizeof(dst->data)) == 0;
590}
591
592static inline bool nfs4_stateid_match_other(const nfs4_stateid *dst, const nfs4_stateid *src)
593{
594 return memcmp(dst->other, src->other, NFS4_STATEID_OTHER_SIZE) == 0;
595}
596
597static inline bool nfs4_stateid_is_newer(const nfs4_stateid *s1, const nfs4_stateid *s2)
598{
599 return (s32)(be32_to_cpu(s1->seqid) - be32_to_cpu(s2->seqid)) > 0;
600}
601
602static inline bool nfs4_stateid_is_next(const nfs4_stateid *s1, const nfs4_stateid *s2)
603{
604 u32 seq1 = be32_to_cpu(s1->seqid);
605 u32 seq2 = be32_to_cpu(s2->seqid);
606
607 return seq2 == seq1 + 1U || (seq2 == 1U && seq1 == 0xffffffffU);
608}
609
610static inline bool nfs4_stateid_match_or_older(const nfs4_stateid *dst, const nfs4_stateid *src)
611{
612 return nfs4_stateid_match_other(dst, src) &&
613 !(src->seqid && nfs4_stateid_is_newer(dst, src));
614}
615
616static inline void nfs4_stateid_seqid_inc(nfs4_stateid *s1)
617{
618 u32 seqid = be32_to_cpu(s1->seqid);
619
620 if (++seqid == 0)
621 ++seqid;
622 s1->seqid = cpu_to_be32(seqid);
623}
624
625static inline bool nfs4_valid_open_stateid(const struct nfs4_state *state)
626{
627 return test_bit(NFS_STATE_RECOVERY_FAILED, &state->flags) == 0;
628}
629
630static inline bool nfs4_state_match_open_stateid_other(const struct nfs4_state *state,
631 const nfs4_stateid *stateid)
632{
633 return test_bit(NFS_OPEN_STATE, &state->flags) &&
634 nfs4_stateid_match_other(&state->open_stateid, stateid);
635}
636
637
638#ifdef CONFIG_NFS_V4_2
639extern int __init nfs4_xattr_cache_init(void);
640extern void nfs4_xattr_cache_exit(void);
641extern void nfs4_xattr_cache_add(struct inode *inode, const char *name,
642 const char *buf, struct page **pages,
643 ssize_t buflen);
644extern void nfs4_xattr_cache_remove(struct inode *inode, const char *name);
645extern ssize_t nfs4_xattr_cache_get(struct inode *inode, const char *name,
646 char *buf, ssize_t buflen);
647extern void nfs4_xattr_cache_set_list(struct inode *inode, const char *buf,
648 ssize_t buflen);
649extern ssize_t nfs4_xattr_cache_list(struct inode *inode, char *buf,
650 ssize_t buflen);
651extern void nfs4_xattr_cache_zap(struct inode *inode);
652#else
653static inline void nfs4_xattr_cache_zap(struct inode *inode)
654{
655}
656#endif
657
658#else
659
660#define nfs4_close_state(a, b) do { } while (0)
661#define nfs4_close_sync(a, b) do { } while (0)
662#define nfs4_state_protect(a, b, c, d) do { } while (0)
663#define nfs4_state_protect_write(a, b, c, d) do { } while (0)
664
665
666#endif
667#endif
668