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4ce79717 TM |
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 | ||
89d77c8f | 12 | #if IS_ENABLED(CONFIG_NFS_V4) |
4ce79717 | 13 | |
33021279 TM |
14 | #define NFS4_MAX_LOOP_ON_RECOVER (10) |
15 | ||
4ce79717 TM |
16 | struct idmap; |
17 | ||
4ce79717 | 18 | enum nfs4_client_state { |
e005e804 | 19 | NFS4CLNT_MANAGER_RUNNING = 0, |
e598d843 | 20 | NFS4CLNT_CHECK_LEASE, |
58d9714a | 21 | NFS4CLNT_LEASE_EXPIRED, |
b79a4a1b TM |
22 | NFS4CLNT_RECLAIM_REBOOT, |
23 | NFS4CLNT_RECLAIM_NOGRACE, | |
707fb4b3 | 24 | NFS4CLNT_DELEGRETURN, |
6df08189 | 25 | NFS4CLNT_SESSION_RESET, |
fd954ae1 | 26 | NFS4CLNT_LEASE_CONFIRM, |
78fe0f41 | 27 | NFS4CLNT_SERVER_SCOPE_MISMATCH, |
2c820d9a | 28 | NFS4CLNT_PURGE_STATE, |
a9e64442 | 29 | NFS4CLNT_BIND_CONN_TO_SESSION, |
4ce79717 TM |
30 | }; |
31 | ||
a2118c33 | 32 | enum nfs4_session_state { |
1055d76d | 33 | NFS4_SESSION_INITING, |
a2118c33 TM |
34 | NFS4_SESSION_DRAINING, |
35 | }; | |
36 | ||
2f60ea6b TM |
37 | #define NFS4_RENEW_TIMEOUT 0x01 |
38 | #define NFS4_RENEW_DELEGATION_CB 0x02 | |
39 | ||
97dc1359 TM |
40 | struct nfs4_minor_version_ops { |
41 | u32 minor_version; | |
42 | ||
7c513058 BS |
43 | int (*call_sync)(struct rpc_clnt *clnt, |
44 | struct nfs_server *server, | |
97dc1359 TM |
45 | struct rpc_message *msg, |
46 | struct nfs4_sequence_args *args, | |
47 | struct nfs4_sequence_res *res, | |
48 | int cache_reply); | |
36281caa | 49 | bool (*match_stateid)(const nfs4_stateid *, |
e047a10c | 50 | const nfs4_stateid *); |
fca78d6d BS |
51 | int (*find_root_sec)(struct nfs_server *, struct nfs_fh *, |
52 | struct nfs_fsinfo *); | |
c48f4f35 TM |
53 | const struct nfs4_state_recovery_ops *reboot_recovery_ops; |
54 | const struct nfs4_state_recovery_ops *nograce_recovery_ops; | |
55 | const struct nfs4_state_maintenance_ops *state_renewal_ops; | |
97dc1359 TM |
56 | }; |
57 | ||
cee54fc9 TM |
58 | #define NFS_SEQID_CONFIRMED 1 |
59 | struct nfs_seqid_counter { | |
95b72eb0 | 60 | ktime_t create_time; |
48c22eb2 | 61 | int owner_id; |
cee54fc9 TM |
62 | int flags; |
63 | u32 counter; | |
7ba127ab TM |
64 | spinlock_t lock; /* Protects the list */ |
65 | struct list_head list; /* Defines sequence of RPC calls */ | |
66 | struct rpc_wait_queue wait; /* RPC call delay queue */ | |
cee54fc9 TM |
67 | }; |
68 | ||
69 | struct nfs_seqid { | |
cee54fc9 | 70 | struct nfs_seqid_counter *sequence; |
4e51336a | 71 | struct list_head list; |
4601df20 | 72 | struct rpc_task *task; |
cee54fc9 TM |
73 | }; |
74 | ||
75 | static inline void nfs_confirm_seqid(struct nfs_seqid_counter *seqid, int status) | |
76 | { | |
77 | if (seqid_mutating_err(-status)) | |
78 | seqid->flags |= NFS_SEQID_CONFIRMED; | |
79 | } | |
80 | ||
4ce79717 TM |
81 | /* |
82 | * NFS4 state_owners and lock_owners are simply labels for ordered | |
83 | * sequences of RPC calls. Their sole purpose is to provide once-only | |
84 | * semantics by allowing the server to identify replayed requests. | |
4ce79717 TM |
85 | */ |
86 | struct nfs4_state_owner { | |
6f2e64d3 | 87 | struct nfs_server *so_server; |
0aaaf5c4 CL |
88 | struct list_head so_lru; |
89 | unsigned long so_expires; | |
24d292b8 | 90 | struct rb_node so_server_node; |
4ce79717 TM |
91 | |
92 | struct rpc_cred *so_cred; /* Associated cred */ | |
9f958ab8 TM |
93 | |
94 | spinlock_t so_lock; | |
95 | atomic_t so_count; | |
7eff03ae | 96 | unsigned long so_flags; |
4ce79717 | 97 | struct list_head so_states; |
cee54fc9 | 98 | struct nfs_seqid_counter so_seqid; |
4ce79717 TM |
99 | }; |
100 | ||
7eff03ae TM |
101 | enum { |
102 | NFS_OWNER_RECLAIM_REBOOT, | |
103 | NFS_OWNER_RECLAIM_NOGRACE | |
104 | }; | |
105 | ||
afe6c27c AB |
106 | #define NFS_LOCK_NEW 0 |
107 | #define NFS_LOCK_RECLAIM 1 | |
108 | #define NFS_LOCK_EXPIRED 2 | |
109 | ||
4ce79717 TM |
110 | /* |
111 | * struct nfs4_state maintains the client-side state for a given | |
112 | * (state_owner,inode) tuple (OPEN) or state_owner (LOCK). | |
113 | * | |
114 | * OPEN: | |
115 | * In order to know when to OPEN_DOWNGRADE or CLOSE the state on the server, | |
116 | * we need to know how many files are open for reading or writing on a | |
117 | * given inode. This information too is stored here. | |
118 | * | |
119 | * LOCK: one nfs4_state (LOCK) to hold the lock stateid nfs4_state(OPEN) | |
120 | */ | |
121 | ||
77041ed9 TM |
122 | struct nfs4_lock_owner { |
123 | unsigned int lo_type; | |
124 | #define NFS4_ANY_LOCK_TYPE (0U) | |
125 | #define NFS4_FLOCK_LOCK_TYPE (1U << 0) | |
126 | #define NFS4_POSIX_LOCK_TYPE (1U << 1) | |
127 | union { | |
128 | fl_owner_t posix_owner; | |
129 | pid_t flock_owner; | |
130 | } lo_u; | |
131 | }; | |
132 | ||
4ce79717 TM |
133 | struct nfs4_lock_state { |
134 | struct list_head ls_locks; /* Other lock stateids */ | |
8d0a8a9d | 135 | struct nfs4_state * ls_state; /* Pointer to open state */ |
795a88c9 TM |
136 | #define NFS_LOCK_INITIALIZED 0 |
137 | unsigned long ls_flags; | |
cee54fc9 | 138 | struct nfs_seqid_counter ls_seqid; |
4ce79717 TM |
139 | nfs4_stateid ls_stateid; |
140 | atomic_t ls_count; | |
77041ed9 | 141 | struct nfs4_lock_owner ls_owner; |
4ce79717 TM |
142 | }; |
143 | ||
144 | /* bits for nfs4_state->flags */ | |
145 | enum { | |
146 | LK_STATE_IN_USE, | |
003707c7 TM |
147 | NFS_DELEGATED_STATE, /* Current stateid is delegation */ |
148 | NFS_O_RDONLY_STATE, /* OPEN stateid has read-only state */ | |
149 | NFS_O_WRONLY_STATE, /* OPEN stateid has write-only state */ | |
150 | NFS_O_RDWR_STATE, /* OPEN stateid has read/write state */ | |
b79a4a1b TM |
151 | NFS_STATE_RECLAIM_REBOOT, /* OPEN stateid server rebooted */ |
152 | NFS_STATE_RECLAIM_NOGRACE, /* OPEN stateid needs to recover state */ | |
8e469ebd | 153 | NFS_STATE_POSIX_LOCKS, /* Posix locks are supported */ |
4ce79717 TM |
154 | }; |
155 | ||
156 | struct nfs4_state { | |
157 | struct list_head open_states; /* List of states for the same state_owner */ | |
158 | struct list_head inode_states; /* List of states for the same inode */ | |
159 | struct list_head lock_states; /* List of subservient lock stateids */ | |
160 | ||
161 | struct nfs4_state_owner *owner; /* Pointer to the open owner */ | |
162 | struct inode *inode; /* Pointer to the inode */ | |
163 | ||
164 | unsigned long flags; /* Do we hold any locks? */ | |
8d0a8a9d | 165 | spinlock_t state_lock; /* Protects the lock_states list */ |
4ce79717 | 166 | |
8bda4e4c | 167 | seqlock_t seqlock; /* Protects the stateid/open_stateid */ |
003707c7 TM |
168 | nfs4_stateid stateid; /* Current stateid: may be delegation */ |
169 | nfs4_stateid open_stateid; /* OPEN stateid */ | |
4ce79717 | 170 | |
8bda4e4c | 171 | /* The following 3 fields are protected by owner->so_lock */ |
003707c7 TM |
172 | unsigned int n_rdonly; /* Number of read-only references */ |
173 | unsigned int n_wronly; /* Number of write-only references */ | |
174 | unsigned int n_rdwr; /* Number of read/write references */ | |
dc0b027d | 175 | fmode_t state; /* State on the server (R,W, or RW) */ |
4ce79717 TM |
176 | atomic_t count; |
177 | }; | |
178 | ||
179 | ||
180 | struct nfs4_exception { | |
181 | long timeout; | |
182 | int retry; | |
9e33bed5 | 183 | struct nfs4_state *state; |
3114ea7a | 184 | struct inode *inode; |
4ce79717 TM |
185 | }; |
186 | ||
187 | struct nfs4_state_recovery_ops { | |
7eff03ae | 188 | int owner_flag_bit; |
b79a4a1b | 189 | int state_flag_bit; |
4ce79717 TM |
190 | int (*recover_open)(struct nfs4_state_owner *, struct nfs4_state *); |
191 | int (*recover_lock)(struct nfs4_state *, struct file_lock *); | |
591d71cb | 192 | int (*establish_clid)(struct nfs_client *, struct rpc_cred *); |
90a16617 | 193 | struct rpc_cred * (*get_clid_cred)(struct nfs_client *); |
fce5c838 | 194 | int (*reclaim_complete)(struct nfs_client *); |
05f4c350 CL |
195 | int (*detect_trunking)(struct nfs_client *, struct nfs_client **, |
196 | struct rpc_cred *); | |
4ce79717 TM |
197 | }; |
198 | ||
29fba38b | 199 | struct nfs4_state_maintenance_ops { |
2f60ea6b | 200 | int (*sched_state_renewal)(struct nfs_client *, struct rpc_cred *, unsigned); |
a7b72103 | 201 | struct rpc_cred * (*get_state_renewal_cred_locked)(struct nfs_client *); |
8e69514f | 202 | int (*renew_lease)(struct nfs_client *, struct rpc_cred *); |
29fba38b BH |
203 | }; |
204 | ||
f786aa90 | 205 | extern const struct dentry_operations nfs4_dentry_operations; |
73a79706 BS |
206 | |
207 | /* dir.c */ | |
208 | int nfs_atomic_open(struct inode *, struct dentry *, struct file *, | |
209 | unsigned, umode_t, int *); | |
6b3b5496 | 210 | |
1ae811ee | 211 | /* super.c */ |
212 | extern struct file_system_type nfs4_fs_type; | |
213 | ||
72de53ec | 214 | /* nfs4namespace.c */ |
2671bfc3 | 215 | rpc_authflavor_t nfs_find_best_sec(struct nfs4_secinfo_flavors *); |
72de53ec | 216 | struct rpc_clnt *nfs4_create_sec_client(struct rpc_clnt *, struct inode *, struct qstr *); |
281cad46 BS |
217 | struct vfsmount *nfs4_submount(struct nfs_server *, struct dentry *, |
218 | struct nfs_fh *, struct nfs_fattr *); | |
72de53ec | 219 | |
4ce79717 | 220 | /* nfs4proc.c */ |
bb8b27e5 TM |
221 | extern int nfs4_proc_setclientid(struct nfs_client *, u32, unsigned short, struct rpc_cred *, struct nfs4_setclientid_res *); |
222 | extern int nfs4_proc_setclientid_confirm(struct nfs_client *, struct nfs4_setclientid_res *arg, struct rpc_cred *); | |
3028eb2b | 223 | extern int nfs4_proc_get_rootfh(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); |
2cf047c9 | 224 | extern int nfs4_proc_bind_conn_to_session(struct nfs_client *, struct rpc_cred *cred); |
4d643d1d | 225 | extern int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred); |
66245539 | 226 | extern int nfs4_destroy_clientid(struct nfs_client *clp); |
591d71cb | 227 | extern int nfs4_init_clientid(struct nfs_client *, struct rpc_cred *); |
4d643d1d | 228 | extern int nfs41_init_clientid(struct nfs_client *, struct rpc_cred *); |
1f7977c1 | 229 | extern int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait); |
55a97593 | 230 | extern int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle); |
f05d147f BS |
231 | extern int nfs4_proc_fs_locations(struct rpc_clnt *, struct inode *, const struct qstr *, |
232 | struct nfs4_fs_locations *, struct page *); | |
233 | extern struct rpc_clnt *nfs4_proc_lookup_mountpoint(struct inode *, struct qstr *, | |
234 | struct nfs_fh *, struct nfs_fattr *); | |
72de53ec | 235 | extern int nfs4_proc_secinfo(struct inode *, const struct qstr *, struct nfs4_secinfo_flavors *); |
cf470c3e | 236 | extern int nfs4_release_lockowner(struct nfs4_lock_state *); |
64c2ce8b | 237 | extern const struct xattr_handler *nfs4_xattr_handlers[]; |
4ce79717 | 238 | |
557134a3 | 239 | #if defined(CONFIG_NFS_V4_1) |
035168ab TM |
240 | static inline struct nfs4_session *nfs4_get_session(const struct nfs_server *server) |
241 | { | |
242 | return server->nfs_client->cl_session; | |
243 | } | |
244 | ||
961a828d | 245 | extern bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy); |
035168ab | 246 | extern int nfs4_setup_sequence(const struct nfs_server *server, |
fbcd4abc | 247 | struct nfs4_sequence_args *args, struct nfs4_sequence_res *res, |
9d12b216 | 248 | struct rpc_task *task); |
dc70d7b3 AA |
249 | extern int nfs41_setup_sequence(struct nfs4_session *session, |
250 | struct nfs4_sequence_args *args, struct nfs4_sequence_res *res, | |
9d12b216 | 251 | struct rpc_task *task); |
848f5bda TM |
252 | extern int nfs4_proc_create_session(struct nfs_client *, struct rpc_cred *); |
253 | extern int nfs4_proc_destroy_session(struct nfs4_session *, struct rpc_cred *); | |
9430fb6b RL |
254 | extern int nfs4_proc_get_lease_time(struct nfs_client *clp, |
255 | struct nfs_fsinfo *fsinfo); | |
863a3c6c | 256 | extern int nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, |
ef311537 | 257 | bool sync); |
94de8b27 AA |
258 | |
259 | static inline bool | |
260 | is_ds_only_client(struct nfs_client *clp) | |
261 | { | |
262 | return (clp->cl_exchange_flags & EXCHGID4_FLAG_MASK_PNFS) == | |
263 | EXCHGID4_FLAG_USE_PNFS_DS; | |
264 | } | |
d83217c1 AA |
265 | |
266 | static inline bool | |
267 | is_ds_client(struct nfs_client *clp) | |
268 | { | |
269 | return clp->cl_exchange_flags & EXCHGID4_FLAG_USE_PNFS_DS; | |
270 | } | |
fbcd4abc | 271 | #else /* CONFIG_NFS_v4_1 */ |
035168ab TM |
272 | static inline struct nfs4_session *nfs4_get_session(const struct nfs_server *server) |
273 | { | |
274 | return NULL; | |
275 | } | |
276 | ||
277 | static inline int nfs4_setup_sequence(const struct nfs_server *server, | |
fbcd4abc | 278 | struct nfs4_sequence_args *args, struct nfs4_sequence_res *res, |
9d12b216 | 279 | struct rpc_task *task) |
fbcd4abc AA |
280 | { |
281 | return 0; | |
282 | } | |
fccba804 | 283 | |
94de8b27 AA |
284 | static inline bool |
285 | is_ds_only_client(struct nfs_client *clp) | |
d83217c1 AA |
286 | { |
287 | return false; | |
288 | } | |
289 | ||
290 | static inline bool | |
291 | is_ds_client(struct nfs_client *clp) | |
94de8b27 AA |
292 | { |
293 | return false; | |
294 | } | |
557134a3 | 295 | #endif /* CONFIG_NFS_V4_1 */ |
4ce79717 | 296 | |
97dc1359 | 297 | extern const struct nfs4_minor_version_ops *nfs_v4_minor_ops[]; |
29fba38b | 298 | |
1549210f | 299 | extern const u32 nfs4_fattr_bitmap[3]; |
4ce79717 TM |
300 | extern const u32 nfs4_statfs_bitmap[2]; |
301 | extern const u32 nfs4_pathconf_bitmap[2]; | |
dae100c2 | 302 | extern const u32 nfs4_fsinfo_bitmap[3]; |
830b8e33 | 303 | extern const u32 nfs4_fs_locations_bitmap[2]; |
4ce79717 | 304 | |
cdb7eced BS |
305 | void nfs4_free_client(struct nfs_client *); |
306 | ||
6663ee7f BS |
307 | struct nfs_client *nfs4_alloc_client(const struct nfs_client_initdata *); |
308 | ||
4ce79717 | 309 | /* nfs4renewd.c */ |
adfa6f98 | 310 | extern void nfs4_schedule_state_renewal(struct nfs_client *); |
4ce79717 | 311 | extern void nfs4_renewd_prepare_shutdown(struct nfs_server *); |
adfa6f98 | 312 | extern void nfs4_kill_renewd(struct nfs_client *); |
65f27f38 | 313 | extern void nfs4_renew_state(struct work_struct *); |
4ce79717 TM |
314 | |
315 | /* nfs4state.c */ | |
a7b72103 | 316 | struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp); |
6dc9d57a | 317 | struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp); |
05f4c350 CL |
318 | int nfs4_discover_server_trunking(struct nfs_client *clp, |
319 | struct nfs_client **); | |
320 | int nfs40_discover_server_trunking(struct nfs_client *clp, | |
321 | struct nfs_client **, struct rpc_cred *); | |
a7b72103 AA |
322 | #if defined(CONFIG_NFS_V4_1) |
323 | struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp); | |
b4b82607 | 324 | struct rpc_cred *nfs4_get_exchange_id_cred(struct nfs_client *clp); |
05f4c350 CL |
325 | int nfs41_discover_server_trunking(struct nfs_client *clp, |
326 | struct nfs_client **, struct rpc_cred *); | |
9f594791 | 327 | extern void nfs4_schedule_session_recovery(struct nfs4_session *, int); |
ac074835 | 328 | extern void nfs41_server_notify_target_slotid_update(struct nfs_client *clp); |
5d63360d TM |
329 | |
330 | extern void nfs4_session_drain_complete(struct nfs4_session *session, | |
331 | struct nfs4_slot_table *tbl); | |
332 | ||
333 | static inline bool nfs4_session_draining(struct nfs4_session *session) | |
334 | { | |
335 | return !!test_bit(NFS4_SESSION_DRAINING, &session->session_state); | |
336 | } | |
0400a6b0 | 337 | #else |
9f594791 | 338 | static inline void nfs4_schedule_session_recovery(struct nfs4_session *session, int err) |
0400a6b0 TM |
339 | { |
340 | } | |
a7b72103 | 341 | #endif /* CONFIG_NFS_V4_1 */ |
4ce79717 | 342 | |
d1e284d5 | 343 | extern struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *, struct rpc_cred *, gfp_t); |
4ce79717 | 344 | extern void nfs4_put_state_owner(struct nfs4_state_owner *); |
0aaaf5c4 | 345 | extern void nfs4_purge_state_owners(struct nfs_server *); |
4ce79717 TM |
346 | extern struct nfs4_state * nfs4_get_open_state(struct inode *, struct nfs4_state_owner *); |
347 | extern void nfs4_put_open_state(struct nfs4_state *); | |
643168c2 AV |
348 | extern void nfs4_close_state(struct nfs4_state *, fmode_t); |
349 | extern void nfs4_close_sync(struct nfs4_state *, fmode_t); | |
dc0b027d | 350 | extern void nfs4_state_set_mode_locked(struct nfs4_state *, fmode_t); |
a1d0b5ee TM |
351 | extern void nfs_inode_find_state_and_recover(struct inode *inode, |
352 | const nfs4_stateid *stateid); | |
0400a6b0 | 353 | extern void nfs4_schedule_lease_recovery(struct nfs_client *); |
33021279 TM |
354 | extern int nfs4_wait_clnt_recover(struct nfs_client *clp); |
355 | extern int nfs4_client_recover_expired_lease(struct nfs_client *clp); | |
b0d3ded1 | 356 | extern void nfs4_schedule_state_manager(struct nfs_client *); |
042b60be | 357 | extern void nfs4_schedule_path_down_recovery(struct nfs_client *clp); |
0400a6b0 | 358 | extern void nfs4_schedule_stateid_recovery(const struct nfs_server *, struct nfs4_state *); |
0629e370 | 359 | extern void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags); |
78fe0f41 | 360 | extern void nfs41_handle_server_scope(struct nfs_client *, |
79d4e1f0 | 361 | struct nfs41_server_scope **); |
faf5f49c | 362 | extern void nfs4_put_lock_state(struct nfs4_lock_state *lsp); |
8d0a8a9d | 363 | extern int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl); |
4fc8796d | 364 | extern void nfs4_select_rw_stateid(nfs4_stateid *, struct nfs4_state *, |
2a369153 | 365 | fmode_t, const struct nfs_lockowner *); |
4ce79717 | 366 | |
8535b2be | 367 | extern struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask); |
cee54fc9 TM |
368 | extern int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task); |
369 | extern void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid); | |
370 | extern void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid); | |
72211dbe | 371 | extern void nfs_release_seqid(struct nfs_seqid *seqid); |
cee54fc9 TM |
372 | extern void nfs_free_seqid(struct nfs_seqid *seqid); |
373 | ||
5ae67c4f | 374 | extern void nfs4_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp); |
cf470c3e | 375 | |
4ce79717 TM |
376 | extern const nfs4_stateid zero_stateid; |
377 | ||
129d1977 | 378 | /* nfs4super.c */ |
fbdefd64 | 379 | struct nfs_mount_info; |
ab7017a3 | 380 | extern struct nfs_subversion nfs_v4; |
ff9099f2 | 381 | struct dentry *nfs4_try_mount(int, const char *, struct nfs_mount_info *, struct nfs_subversion *); |
fac1e8e4 BS |
382 | extern bool nfs4_disable_idmapping; |
383 | extern unsigned short max_session_slots; | |
384 | extern unsigned short send_implementation_id; | |
89d77c8f | 385 | |
6f2ea7f2 CL |
386 | #define NFS4_CLIENT_ID_UNIQ_LEN (64) |
387 | extern char nfs4_client_id_uniquifier[NFS4_CLIENT_ID_UNIQ_LEN]; | |
388 | ||
466bfe7f BS |
389 | /* nfs4sysctl.c */ |
390 | #ifdef CONFIG_SYSCTL | |
391 | int nfs4_register_sysctl(void); | |
392 | void nfs4_unregister_sysctl(void); | |
393 | #else | |
394 | static inline int nfs4_register_sysctl(void) | |
395 | { | |
396 | return 0; | |
397 | } | |
398 | ||
0add3e85 | 399 | static inline void nfs4_unregister_sysctl(void) |
466bfe7f BS |
400 | { |
401 | } | |
402 | #endif | |
403 | ||
4ce79717 | 404 | /* nfs4xdr.c */ |
4ce79717 TM |
405 | extern struct rpc_procinfo nfs4_procedures[]; |
406 | ||
407 | struct nfs4_mount_data; | |
408 | ||
409 | /* callback_xdr.c */ | |
410 | extern struct svc_version nfs4_callback_version1; | |
07bccc2d | 411 | extern struct svc_version nfs4_callback_version4; |
4ce79717 | 412 | |
f597c537 TM |
413 | static inline void nfs4_stateid_copy(nfs4_stateid *dst, const nfs4_stateid *src) |
414 | { | |
2d2f24ad | 415 | memcpy(dst, src, sizeof(*dst)); |
f597c537 TM |
416 | } |
417 | ||
418 | static inline bool nfs4_stateid_match(const nfs4_stateid *dst, const nfs4_stateid *src) | |
419 | { | |
2d2f24ad | 420 | return memcmp(dst, src, sizeof(*dst)) == 0; |
f597c537 TM |
421 | } |
422 | ||
4ce79717 TM |
423 | #else |
424 | ||
643168c2 AV |
425 | #define nfs4_close_state(a, b) do { } while (0) |
426 | #define nfs4_close_sync(a, b) do { } while (0) | |
4ce79717 TM |
427 | |
428 | #endif /* CONFIG_NFS_V4 */ | |
429 | #endif /* __LINUX_FS_NFS_NFS4_FS.H */ |