2 * linux/fs/nfs/nfs4_fs.h
4 * Copyright (C) 2005 Trond Myklebust
6 * NFSv4-specific filesystem definitions and declarations
9 #ifndef __LINUX_FS_NFS_NFS4_FS_H
10 #define __LINUX_FS_NFS_NFS4_FS_H
16 enum nfs4_client_state {
17 NFS4CLNT_MANAGER_RUNNING = 0,
19 NFS4CLNT_LEASE_EXPIRED,
20 NFS4CLNT_RECLAIM_REBOOT,
21 NFS4CLNT_RECLAIM_NOGRACE,
23 NFS4CLNT_LAYOUTRECALL,
24 NFS4CLNT_SESSION_RESET,
26 NFS4CLNT_LEASE_CONFIRM,
27 NFS4CLNT_SERVER_SCOPE_MISMATCH,
30 enum nfs4_session_state {
32 NFS4_SESSION_DRAINING,
35 #define NFS4_RENEW_TIMEOUT 0x01
36 #define NFS4_RENEW_DELEGATION_CB 0x02
38 struct nfs4_minor_version_ops {
41 int (*call_sync)(struct rpc_clnt *clnt,
42 struct nfs_server *server,
43 struct rpc_message *msg,
44 struct nfs4_sequence_args *args,
45 struct nfs4_sequence_res *res,
47 int (*validate_stateid)(struct nfs_delegation *,
48 const nfs4_stateid *);
49 int (*find_root_sec)(struct nfs_server *, struct nfs_fh *,
51 const struct nfs4_state_recovery_ops *reboot_recovery_ops;
52 const struct nfs4_state_recovery_ops *nograce_recovery_ops;
53 const struct nfs4_state_maintenance_ops *state_renewal_ops;
56 #define NFS_SEQID_CONFIRMED 1
57 struct nfs_seqid_counter {
60 spinlock_t lock; /* Protects the list */
61 struct list_head list; /* Defines sequence of RPC calls */
62 struct rpc_wait_queue wait; /* RPC call delay queue */
66 struct nfs_seqid_counter *sequence;
67 struct list_head list;
70 static inline void nfs_confirm_seqid(struct nfs_seqid_counter *seqid, int status)
72 if (seqid_mutating_err(-status))
73 seqid->flags |= NFS_SEQID_CONFIRMED;
77 * NFS4 state_owners and lock_owners are simply labels for ordered
78 * sequences of RPC calls. Their sole purpose is to provide once-only
79 * semantics by allowing the server to identify replayed requests.
81 struct nfs4_state_owner {
82 struct nfs_server *so_server;
83 struct list_head so_lru;
84 unsigned long so_expires;
85 struct rb_node so_server_node;
87 struct rpc_cred *so_cred; /* Associated cred */
91 unsigned long so_flags;
92 struct list_head so_states;
93 struct nfs_seqid_counter so_seqid;
98 NFS_OWNER_RECLAIM_REBOOT,
99 NFS_OWNER_RECLAIM_NOGRACE
102 #define NFS_LOCK_NEW 0
103 #define NFS_LOCK_RECLAIM 1
104 #define NFS_LOCK_EXPIRED 2
107 * struct nfs4_state maintains the client-side state for a given
108 * (state_owner,inode) tuple (OPEN) or state_owner (LOCK).
111 * In order to know when to OPEN_DOWNGRADE or CLOSE the state on the server,
112 * we need to know how many files are open for reading or writing on a
113 * given inode. This information too is stored here.
115 * LOCK: one nfs4_state (LOCK) to hold the lock stateid nfs4_state(OPEN)
118 struct nfs4_lock_owner {
119 unsigned int lo_type;
120 #define NFS4_ANY_LOCK_TYPE (0U)
121 #define NFS4_FLOCK_LOCK_TYPE (1U << 0)
122 #define NFS4_POSIX_LOCK_TYPE (1U << 1)
124 fl_owner_t posix_owner;
129 struct nfs4_lock_state {
130 struct list_head ls_locks; /* Other lock stateids */
131 struct nfs4_state * ls_state; /* Pointer to open state */
132 #define NFS_LOCK_INITIALIZED 1
135 struct nfs_seqid_counter ls_seqid;
136 nfs4_stateid ls_stateid;
138 struct nfs4_lock_owner ls_owner;
141 /* bits for nfs4_state->flags */
144 NFS_DELEGATED_STATE, /* Current stateid is delegation */
145 NFS_O_RDONLY_STATE, /* OPEN stateid has read-only state */
146 NFS_O_WRONLY_STATE, /* OPEN stateid has write-only state */
147 NFS_O_RDWR_STATE, /* OPEN stateid has read/write state */
148 NFS_STATE_RECLAIM_REBOOT, /* OPEN stateid server rebooted */
149 NFS_STATE_RECLAIM_NOGRACE, /* OPEN stateid needs to recover state */
150 NFS_STATE_POSIX_LOCKS, /* Posix locks are supported */
154 struct list_head open_states; /* List of states for the same state_owner */
155 struct list_head inode_states; /* List of states for the same inode */
156 struct list_head lock_states; /* List of subservient lock stateids */
158 struct nfs4_state_owner *owner; /* Pointer to the open owner */
159 struct inode *inode; /* Pointer to the inode */
161 unsigned long flags; /* Do we hold any locks? */
162 spinlock_t state_lock; /* Protects the lock_states list */
164 seqlock_t seqlock; /* Protects the stateid/open_stateid */
165 nfs4_stateid stateid; /* Current stateid: may be delegation */
166 nfs4_stateid open_stateid; /* OPEN stateid */
168 /* The following 3 fields are protected by owner->so_lock */
169 unsigned int n_rdonly; /* Number of read-only references */
170 unsigned int n_wronly; /* Number of write-only references */
171 unsigned int n_rdwr; /* Number of read/write references */
172 fmode_t state; /* State on the server (R,W, or RW) */
177 struct nfs4_exception {
180 struct nfs4_state *state;
183 struct nfs4_state_recovery_ops {
186 int (*recover_open)(struct nfs4_state_owner *, struct nfs4_state *);
187 int (*recover_lock)(struct nfs4_state *, struct file_lock *);
188 int (*establish_clid)(struct nfs_client *, struct rpc_cred *);
189 struct rpc_cred * (*get_clid_cred)(struct nfs_client *);
190 int (*reclaim_complete)(struct nfs_client *);
193 struct nfs4_state_maintenance_ops {
194 int (*sched_state_renewal)(struct nfs_client *, struct rpc_cred *, unsigned);
195 struct rpc_cred * (*get_state_renewal_cred_locked)(struct nfs_client *);
196 int (*renew_lease)(struct nfs_client *, struct rpc_cred *);
199 extern const struct dentry_operations nfs4_dentry_operations;
200 extern const struct inode_operations nfs4_dir_inode_operations;
203 extern int nfs4_proc_setclientid(struct nfs_client *, u32, unsigned short, struct rpc_cred *, struct nfs4_setclientid_res *);
204 extern int nfs4_proc_setclientid_confirm(struct nfs_client *, struct nfs4_setclientid_res *arg, struct rpc_cred *);
205 extern int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred);
206 extern int nfs4_init_clientid(struct nfs_client *, struct rpc_cred *);
207 extern int nfs41_init_clientid(struct nfs_client *, struct rpc_cred *);
208 extern int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc);
209 extern int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle);
210 extern int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
211 struct nfs4_fs_locations *fs_locations, struct page *page);
212 extern void nfs4_release_lockowner(const struct nfs4_lock_state *);
213 extern const struct xattr_handler *nfs4_xattr_handlers[];
215 #if defined(CONFIG_NFS_V4_1)
216 static inline struct nfs4_session *nfs4_get_session(const struct nfs_server *server)
218 return server->nfs_client->cl_session;
221 extern int nfs4_setup_sequence(const struct nfs_server *server,
222 struct nfs4_sequence_args *args, struct nfs4_sequence_res *res,
223 struct rpc_task *task);
224 extern int nfs41_setup_sequence(struct nfs4_session *session,
225 struct nfs4_sequence_args *args, struct nfs4_sequence_res *res,
226 struct rpc_task *task);
227 extern void nfs4_destroy_session(struct nfs4_session *session);
228 extern struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp);
229 extern int nfs4_proc_create_session(struct nfs_client *);
230 extern int nfs4_proc_destroy_session(struct nfs4_session *);
231 extern int nfs4_init_session(struct nfs_server *server);
232 extern int nfs4_proc_get_lease_time(struct nfs_client *clp,
233 struct nfs_fsinfo *fsinfo);
234 extern int nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data,
238 is_ds_only_client(struct nfs_client *clp)
240 return (clp->cl_exchange_flags & EXCHGID4_FLAG_MASK_PNFS) ==
241 EXCHGID4_FLAG_USE_PNFS_DS;
245 is_ds_client(struct nfs_client *clp)
247 return clp->cl_exchange_flags & EXCHGID4_FLAG_USE_PNFS_DS;
249 #else /* CONFIG_NFS_v4_1 */
250 static inline struct nfs4_session *nfs4_get_session(const struct nfs_server *server)
255 static inline int nfs4_setup_sequence(const struct nfs_server *server,
256 struct nfs4_sequence_args *args, struct nfs4_sequence_res *res,
257 struct rpc_task *task)
262 static inline int nfs4_init_session(struct nfs_server *server)
268 is_ds_only_client(struct nfs_client *clp)
274 is_ds_client(struct nfs_client *clp)
278 #endif /* CONFIG_NFS_V4_1 */
280 extern const struct nfs4_minor_version_ops *nfs_v4_minor_ops[];
282 extern const u32 nfs4_fattr_bitmap[2];
283 extern const u32 nfs4_statfs_bitmap[2];
284 extern const u32 nfs4_pathconf_bitmap[2];
285 extern const u32 nfs4_fsinfo_bitmap[3];
286 extern const u32 nfs4_fs_locations_bitmap[2];
289 extern void nfs4_schedule_state_renewal(struct nfs_client *);
290 extern void nfs4_renewd_prepare_shutdown(struct nfs_server *);
291 extern void nfs4_kill_renewd(struct nfs_client *);
292 extern void nfs4_renew_state(struct work_struct *);
295 struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp);
296 struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp);
297 #if defined(CONFIG_NFS_V4_1)
298 struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp);
299 struct rpc_cred *nfs4_get_exchange_id_cred(struct nfs_client *clp);
300 extern void nfs4_schedule_session_recovery(struct nfs4_session *);
302 static inline void nfs4_schedule_session_recovery(struct nfs4_session *session)
305 #endif /* CONFIG_NFS_V4_1 */
307 extern struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *, struct rpc_cred *, gfp_t);
308 extern void nfs4_put_state_owner(struct nfs4_state_owner *);
309 extern void nfs4_purge_state_owners(struct nfs_server *);
310 extern struct nfs4_state * nfs4_get_open_state(struct inode *, struct nfs4_state_owner *);
311 extern void nfs4_put_open_state(struct nfs4_state *);
312 extern void nfs4_close_state(struct nfs4_state *, fmode_t);
313 extern void nfs4_close_sync(struct nfs4_state *, fmode_t);
314 extern void nfs4_state_set_mode_locked(struct nfs4_state *, fmode_t);
315 extern void nfs4_schedule_lease_recovery(struct nfs_client *);
316 extern void nfs4_schedule_state_manager(struct nfs_client *);
317 extern void nfs4_schedule_path_down_recovery(struct nfs_client *clp);
318 extern void nfs4_schedule_stateid_recovery(const struct nfs_server *, struct nfs4_state *);
319 extern void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags);
320 extern void nfs41_handle_recall_slot(struct nfs_client *clp);
321 extern void nfs41_handle_server_scope(struct nfs_client *,
322 struct server_scope **);
323 extern void nfs4_put_lock_state(struct nfs4_lock_state *lsp);
324 extern int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl);
325 extern void nfs4_copy_stateid(nfs4_stateid *, struct nfs4_state *, fl_owner_t, pid_t);
327 extern struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask);
328 extern int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task);
329 extern void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid);
330 extern void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid);
331 extern void nfs_release_seqid(struct nfs_seqid *seqid);
332 extern void nfs_free_seqid(struct nfs_seqid *seqid);
334 extern const nfs4_stateid zero_stateid;
337 extern struct rpc_procinfo nfs4_procedures[];
339 struct nfs4_mount_data;
342 extern struct svc_version nfs4_callback_version1;
343 extern struct svc_version nfs4_callback_version4;
347 #define nfs4_close_state(a, b) do { } while (0)
348 #define nfs4_close_sync(a, b) do { } while (0)
350 #endif /* CONFIG_NFS_V4 */
351 #endif /* __LINUX_FS_NFS_NFS4_FS.H */