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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 | ||
12 | #ifdef CONFIG_NFS_V4 | |
13 | ||
14 | struct idmap; | |
15 | ||
4ce79717 | 16 | enum nfs4_client_state { |
e005e804 | 17 | NFS4CLNT_MANAGER_RUNNING = 0, |
e598d843 | 18 | NFS4CLNT_CHECK_LEASE, |
58d9714a | 19 | NFS4CLNT_LEASE_EXPIRED, |
b79a4a1b TM |
20 | NFS4CLNT_RECLAIM_REBOOT, |
21 | NFS4CLNT_RECLAIM_NOGRACE, | |
707fb4b3 | 22 | NFS4CLNT_DELEGRETURN, |
6df08189 | 23 | NFS4CLNT_SESSION_RESET, |
b9efa1b2 | 24 | NFS4CLNT_RECALL_SLOT, |
fd954ae1 | 25 | NFS4CLNT_LEASE_CONFIRM, |
78fe0f41 | 26 | NFS4CLNT_SERVER_SCOPE_MISMATCH, |
4ce79717 TM |
27 | }; |
28 | ||
a2118c33 | 29 | enum nfs4_session_state { |
1055d76d | 30 | NFS4_SESSION_INITING, |
a2118c33 TM |
31 | NFS4_SESSION_DRAINING, |
32 | }; | |
33 | ||
2f60ea6b TM |
34 | #define NFS4_RENEW_TIMEOUT 0x01 |
35 | #define NFS4_RENEW_DELEGATION_CB 0x02 | |
36 | ||
97dc1359 TM |
37 | struct nfs4_minor_version_ops { |
38 | u32 minor_version; | |
39 | ||
7c513058 BS |
40 | int (*call_sync)(struct rpc_clnt *clnt, |
41 | struct nfs_server *server, | |
97dc1359 TM |
42 | struct rpc_message *msg, |
43 | struct nfs4_sequence_args *args, | |
44 | struct nfs4_sequence_res *res, | |
45 | int cache_reply); | |
36281caa | 46 | bool (*match_stateid)(const nfs4_stateid *, |
e047a10c | 47 | const nfs4_stateid *); |
fca78d6d BS |
48 | int (*find_root_sec)(struct nfs_server *, struct nfs_fh *, |
49 | struct nfs_fsinfo *); | |
c48f4f35 TM |
50 | const struct nfs4_state_recovery_ops *reboot_recovery_ops; |
51 | const struct nfs4_state_recovery_ops *nograce_recovery_ops; | |
52 | const struct nfs4_state_maintenance_ops *state_renewal_ops; | |
97dc1359 TM |
53 | }; |
54 | ||
48c22eb2 TM |
55 | struct nfs_unique_id { |
56 | struct rb_node rb_node; | |
57 | __u64 id; | |
58 | }; | |
59 | ||
cee54fc9 TM |
60 | #define NFS_SEQID_CONFIRMED 1 |
61 | struct nfs_seqid_counter { | |
48c22eb2 | 62 | int owner_id; |
cee54fc9 TM |
63 | int flags; |
64 | u32 counter; | |
7ba127ab TM |
65 | spinlock_t lock; /* Protects the list */ |
66 | struct list_head list; /* Defines sequence of RPC calls */ | |
67 | struct rpc_wait_queue wait; /* RPC call delay queue */ | |
cee54fc9 TM |
68 | }; |
69 | ||
70 | struct nfs_seqid { | |
cee54fc9 | 71 | struct nfs_seqid_counter *sequence; |
4e51336a | 72 | struct list_head list; |
4601df20 | 73 | struct rpc_task *task; |
cee54fc9 TM |
74 | }; |
75 | ||
76 | static inline void nfs_confirm_seqid(struct nfs_seqid_counter *seqid, int status) | |
77 | { | |
78 | if (seqid_mutating_err(-status)) | |
79 | seqid->flags |= NFS_SEQID_CONFIRMED; | |
80 | } | |
81 | ||
4ce79717 TM |
82 | /* |
83 | * NFS4 state_owners and lock_owners are simply labels for ordered | |
84 | * sequences of RPC calls. Their sole purpose is to provide once-only | |
85 | * semantics by allowing the server to identify replayed requests. | |
4ce79717 TM |
86 | */ |
87 | struct nfs4_state_owner { | |
6f2e64d3 | 88 | struct nfs_server *so_server; |
0aaaf5c4 CL |
89 | struct list_head so_lru; |
90 | unsigned long so_expires; | |
24d292b8 | 91 | struct rb_node so_server_node; |
4ce79717 TM |
92 | |
93 | struct rpc_cred *so_cred; /* Associated cred */ | |
9f958ab8 TM |
94 | |
95 | spinlock_t so_lock; | |
96 | atomic_t so_count; | |
7eff03ae | 97 | unsigned long so_flags; |
4ce79717 | 98 | struct list_head so_states; |
cee54fc9 | 99 | struct nfs_seqid_counter so_seqid; |
4ce79717 TM |
100 | }; |
101 | ||
7eff03ae TM |
102 | enum { |
103 | NFS_OWNER_RECLAIM_REBOOT, | |
104 | NFS_OWNER_RECLAIM_NOGRACE | |
105 | }; | |
106 | ||
afe6c27c AB |
107 | #define NFS_LOCK_NEW 0 |
108 | #define NFS_LOCK_RECLAIM 1 | |
109 | #define NFS_LOCK_EXPIRED 2 | |
110 | ||
4ce79717 TM |
111 | /* |
112 | * struct nfs4_state maintains the client-side state for a given | |
113 | * (state_owner,inode) tuple (OPEN) or state_owner (LOCK). | |
114 | * | |
115 | * OPEN: | |
116 | * In order to know when to OPEN_DOWNGRADE or CLOSE the state on the server, | |
117 | * we need to know how many files are open for reading or writing on a | |
118 | * given inode. This information too is stored here. | |
119 | * | |
120 | * LOCK: one nfs4_state (LOCK) to hold the lock stateid nfs4_state(OPEN) | |
121 | */ | |
122 | ||
77041ed9 TM |
123 | struct nfs4_lock_owner { |
124 | unsigned int lo_type; | |
125 | #define NFS4_ANY_LOCK_TYPE (0U) | |
126 | #define NFS4_FLOCK_LOCK_TYPE (1U << 0) | |
127 | #define NFS4_POSIX_LOCK_TYPE (1U << 1) | |
128 | union { | |
129 | fl_owner_t posix_owner; | |
130 | pid_t flock_owner; | |
131 | } lo_u; | |
132 | }; | |
133 | ||
4ce79717 TM |
134 | struct nfs4_lock_state { |
135 | struct list_head ls_locks; /* Other lock stateids */ | |
8d0a8a9d | 136 | struct nfs4_state * ls_state; /* Pointer to open state */ |
4ce79717 TM |
137 | #define NFS_LOCK_INITIALIZED 1 |
138 | int ls_flags; | |
cee54fc9 | 139 | struct nfs_seqid_counter ls_seqid; |
4ce79717 TM |
140 | nfs4_stateid ls_stateid; |
141 | atomic_t ls_count; | |
77041ed9 | 142 | struct nfs4_lock_owner ls_owner; |
4ce79717 TM |
143 | }; |
144 | ||
145 | /* bits for nfs4_state->flags */ | |
146 | enum { | |
147 | LK_STATE_IN_USE, | |
003707c7 TM |
148 | NFS_DELEGATED_STATE, /* Current stateid is delegation */ |
149 | NFS_O_RDONLY_STATE, /* OPEN stateid has read-only state */ | |
150 | NFS_O_WRONLY_STATE, /* OPEN stateid has write-only state */ | |
151 | NFS_O_RDWR_STATE, /* OPEN stateid has read/write state */ | |
b79a4a1b TM |
152 | NFS_STATE_RECLAIM_REBOOT, /* OPEN stateid server rebooted */ |
153 | NFS_STATE_RECLAIM_NOGRACE, /* OPEN stateid needs to recover state */ | |
8e469ebd | 154 | NFS_STATE_POSIX_LOCKS, /* Posix locks are supported */ |
4ce79717 TM |
155 | }; |
156 | ||
157 | struct nfs4_state { | |
158 | struct list_head open_states; /* List of states for the same state_owner */ | |
159 | struct list_head inode_states; /* List of states for the same inode */ | |
160 | struct list_head lock_states; /* List of subservient lock stateids */ | |
161 | ||
162 | struct nfs4_state_owner *owner; /* Pointer to the open owner */ | |
163 | struct inode *inode; /* Pointer to the inode */ | |
164 | ||
165 | unsigned long flags; /* Do we hold any locks? */ | |
8d0a8a9d | 166 | spinlock_t state_lock; /* Protects the lock_states list */ |
4ce79717 | 167 | |
8bda4e4c | 168 | seqlock_t seqlock; /* Protects the stateid/open_stateid */ |
003707c7 TM |
169 | nfs4_stateid stateid; /* Current stateid: may be delegation */ |
170 | nfs4_stateid open_stateid; /* OPEN stateid */ | |
4ce79717 | 171 | |
8bda4e4c | 172 | /* The following 3 fields are protected by owner->so_lock */ |
003707c7 TM |
173 | unsigned int n_rdonly; /* Number of read-only references */ |
174 | unsigned int n_wronly; /* Number of write-only references */ | |
175 | unsigned int n_rdwr; /* Number of read/write references */ | |
dc0b027d | 176 | fmode_t state; /* State on the server (R,W, or RW) */ |
4ce79717 TM |
177 | atomic_t count; |
178 | }; | |
179 | ||
180 | ||
181 | struct nfs4_exception { | |
182 | long timeout; | |
183 | int retry; | |
9e33bed5 | 184 | struct nfs4_state *state; |
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 *); |
4ce79717 TM |
195 | }; |
196 | ||
29fba38b | 197 | struct nfs4_state_maintenance_ops { |
2f60ea6b | 198 | int (*sched_state_renewal)(struct nfs_client *, struct rpc_cred *, unsigned); |
a7b72103 | 199 | struct rpc_cred * (*get_state_renewal_cred_locked)(struct nfs_client *); |
8e69514f | 200 | int (*renew_lease)(struct nfs_client *, struct rpc_cred *); |
29fba38b BH |
201 | }; |
202 | ||
f786aa90 | 203 | extern const struct dentry_operations nfs4_dentry_operations; |
92e1d5be | 204 | extern const struct inode_operations nfs4_dir_inode_operations; |
6b3b5496 | 205 | |
4ce79717 | 206 | /* nfs4proc.c */ |
bb8b27e5 TM |
207 | extern int nfs4_proc_setclientid(struct nfs_client *, u32, unsigned short, struct rpc_cred *, struct nfs4_setclientid_res *); |
208 | extern int nfs4_proc_setclientid_confirm(struct nfs_client *, struct nfs4_setclientid_res *arg, struct rpc_cred *); | |
4d643d1d | 209 | extern int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred); |
591d71cb | 210 | extern int nfs4_init_clientid(struct nfs_client *, struct rpc_cred *); |
4d643d1d | 211 | extern int nfs41_init_clientid(struct nfs_client *, struct rpc_cred *); |
643168c2 | 212 | extern int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc); |
55a97593 | 213 | extern int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle); |
56659e99 | 214 | extern int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name, |
7aaa0b3b | 215 | struct nfs4_fs_locations *fs_locations, struct page *page); |
d3c7b7cc | 216 | extern void nfs4_release_lockowner(const struct nfs4_lock_state *); |
64c2ce8b | 217 | extern const struct xattr_handler *nfs4_xattr_handlers[]; |
4ce79717 | 218 | |
557134a3 | 219 | #if defined(CONFIG_NFS_V4_1) |
035168ab TM |
220 | static inline struct nfs4_session *nfs4_get_session(const struct nfs_server *server) |
221 | { | |
222 | return server->nfs_client->cl_session; | |
223 | } | |
224 | ||
961a828d | 225 | extern bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy); |
035168ab | 226 | extern int nfs4_setup_sequence(const struct nfs_server *server, |
fbcd4abc | 227 | struct nfs4_sequence_args *args, struct nfs4_sequence_res *res, |
9d12b216 | 228 | struct rpc_task *task); |
dc70d7b3 AA |
229 | extern int nfs41_setup_sequence(struct nfs4_session *session, |
230 | struct nfs4_sequence_args *args, struct nfs4_sequence_res *res, | |
9d12b216 | 231 | struct rpc_task *task); |
557134a3 AA |
232 | extern void nfs4_destroy_session(struct nfs4_session *session); |
233 | extern struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp); | |
f26468fb | 234 | extern int nfs4_proc_create_session(struct nfs_client *); |
c3fad1b1 | 235 | extern int nfs4_proc_destroy_session(struct nfs4_session *); |
fccba804 | 236 | extern int nfs4_init_session(struct nfs_server *server); |
9430fb6b RL |
237 | extern int nfs4_proc_get_lease_time(struct nfs_client *clp, |
238 | struct nfs_fsinfo *fsinfo); | |
863a3c6c | 239 | extern int nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, |
ef311537 | 240 | bool sync); |
94de8b27 AA |
241 | |
242 | static inline bool | |
243 | is_ds_only_client(struct nfs_client *clp) | |
244 | { | |
245 | return (clp->cl_exchange_flags & EXCHGID4_FLAG_MASK_PNFS) == | |
246 | EXCHGID4_FLAG_USE_PNFS_DS; | |
247 | } | |
d83217c1 AA |
248 | |
249 | static inline bool | |
250 | is_ds_client(struct nfs_client *clp) | |
251 | { | |
252 | return clp->cl_exchange_flags & EXCHGID4_FLAG_USE_PNFS_DS; | |
253 | } | |
fbcd4abc | 254 | #else /* CONFIG_NFS_v4_1 */ |
035168ab TM |
255 | static inline struct nfs4_session *nfs4_get_session(const struct nfs_server *server) |
256 | { | |
257 | return NULL; | |
258 | } | |
259 | ||
260 | static inline int nfs4_setup_sequence(const struct nfs_server *server, | |
fbcd4abc | 261 | struct nfs4_sequence_args *args, struct nfs4_sequence_res *res, |
9d12b216 | 262 | struct rpc_task *task) |
fbcd4abc AA |
263 | { |
264 | return 0; | |
265 | } | |
fccba804 TM |
266 | |
267 | static inline int nfs4_init_session(struct nfs_server *server) | |
268 | { | |
269 | return 0; | |
270 | } | |
94de8b27 AA |
271 | |
272 | static inline bool | |
273 | is_ds_only_client(struct nfs_client *clp) | |
d83217c1 AA |
274 | { |
275 | return false; | |
276 | } | |
277 | ||
278 | static inline bool | |
279 | is_ds_client(struct nfs_client *clp) | |
94de8b27 AA |
280 | { |
281 | return false; | |
282 | } | |
557134a3 | 283 | #endif /* CONFIG_NFS_V4_1 */ |
4ce79717 | 284 | |
97dc1359 | 285 | extern const struct nfs4_minor_version_ops *nfs_v4_minor_ops[]; |
29fba38b | 286 | |
4ce79717 TM |
287 | extern const u32 nfs4_fattr_bitmap[2]; |
288 | extern const u32 nfs4_statfs_bitmap[2]; | |
289 | extern const u32 nfs4_pathconf_bitmap[2]; | |
dae100c2 | 290 | extern const u32 nfs4_fsinfo_bitmap[3]; |
830b8e33 | 291 | extern const u32 nfs4_fs_locations_bitmap[2]; |
4ce79717 TM |
292 | |
293 | /* nfs4renewd.c */ | |
adfa6f98 | 294 | extern void nfs4_schedule_state_renewal(struct nfs_client *); |
4ce79717 | 295 | extern void nfs4_renewd_prepare_shutdown(struct nfs_server *); |
adfa6f98 | 296 | extern void nfs4_kill_renewd(struct nfs_client *); |
65f27f38 | 297 | extern void nfs4_renew_state(struct work_struct *); |
4ce79717 TM |
298 | |
299 | /* nfs4state.c */ | |
a7b72103 | 300 | struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp); |
6dc9d57a | 301 | struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp); |
a7b72103 AA |
302 | #if defined(CONFIG_NFS_V4_1) |
303 | struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp); | |
b4b82607 | 304 | struct rpc_cred *nfs4_get_exchange_id_cred(struct nfs_client *clp); |
0400a6b0 TM |
305 | extern void nfs4_schedule_session_recovery(struct nfs4_session *); |
306 | #else | |
307 | static inline void nfs4_schedule_session_recovery(struct nfs4_session *session) | |
308 | { | |
309 | } | |
a7b72103 | 310 | #endif /* CONFIG_NFS_V4_1 */ |
4ce79717 | 311 | |
d1e284d5 | 312 | extern struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *, struct rpc_cred *, gfp_t); |
4ce79717 | 313 | extern void nfs4_put_state_owner(struct nfs4_state_owner *); |
0aaaf5c4 | 314 | extern void nfs4_purge_state_owners(struct nfs_server *); |
4ce79717 TM |
315 | extern struct nfs4_state * nfs4_get_open_state(struct inode *, struct nfs4_state_owner *); |
316 | extern void nfs4_put_open_state(struct nfs4_state *); | |
643168c2 AV |
317 | extern void nfs4_close_state(struct nfs4_state *, fmode_t); |
318 | extern void nfs4_close_sync(struct nfs4_state *, fmode_t); | |
dc0b027d | 319 | extern void nfs4_state_set_mode_locked(struct nfs4_state *, fmode_t); |
a1d0b5ee TM |
320 | extern void nfs_inode_find_state_and_recover(struct inode *inode, |
321 | const nfs4_stateid *stateid); | |
0400a6b0 | 322 | extern void nfs4_schedule_lease_recovery(struct nfs_client *); |
b0d3ded1 | 323 | extern void nfs4_schedule_state_manager(struct nfs_client *); |
042b60be | 324 | extern void nfs4_schedule_path_down_recovery(struct nfs_client *clp); |
0400a6b0 | 325 | extern void nfs4_schedule_stateid_recovery(const struct nfs_server *, struct nfs4_state *); |
0629e370 | 326 | extern void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags); |
b9efa1b2 | 327 | extern void nfs41_handle_recall_slot(struct nfs_client *clp); |
78fe0f41 WAA |
328 | extern void nfs41_handle_server_scope(struct nfs_client *, |
329 | struct server_scope **); | |
faf5f49c | 330 | extern void nfs4_put_lock_state(struct nfs4_lock_state *lsp); |
8d0a8a9d | 331 | extern int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl); |
1e3987c3 | 332 | extern void nfs4_select_rw_stateid(nfs4_stateid *, struct nfs4_state *, fl_owner_t, pid_t); |
4ce79717 | 333 | |
8535b2be | 334 | extern struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask); |
cee54fc9 TM |
335 | extern int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task); |
336 | extern void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid); | |
337 | extern void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid); | |
72211dbe | 338 | extern void nfs_release_seqid(struct nfs_seqid *seqid); |
cee54fc9 TM |
339 | extern void nfs_free_seqid(struct nfs_seqid *seqid); |
340 | ||
4ce79717 TM |
341 | extern const nfs4_stateid zero_stateid; |
342 | ||
343 | /* nfs4xdr.c */ | |
4ce79717 TM |
344 | extern struct rpc_procinfo nfs4_procedures[]; |
345 | ||
346 | struct nfs4_mount_data; | |
347 | ||
348 | /* callback_xdr.c */ | |
349 | extern struct svc_version nfs4_callback_version1; | |
07bccc2d | 350 | extern struct svc_version nfs4_callback_version4; |
4ce79717 | 351 | |
f597c537 TM |
352 | static inline void nfs4_stateid_copy(nfs4_stateid *dst, const nfs4_stateid *src) |
353 | { | |
2d2f24ad | 354 | memcpy(dst, src, sizeof(*dst)); |
f597c537 TM |
355 | } |
356 | ||
357 | static inline bool nfs4_stateid_match(const nfs4_stateid *dst, const nfs4_stateid *src) | |
358 | { | |
2d2f24ad | 359 | return memcmp(dst, src, sizeof(*dst)) == 0; |
f597c537 TM |
360 | } |
361 | ||
4ce79717 TM |
362 | #else |
363 | ||
643168c2 AV |
364 | #define nfs4_close_state(a, b) do { } while (0) |
365 | #define nfs4_close_sync(a, b) do { } while (0) | |
4ce79717 TM |
366 | |
367 | #endif /* CONFIG_NFS_V4 */ | |
368 | #endif /* __LINUX_FS_NFS_NFS4_FS.H */ |