[linux-block.git] / fs / nfs / nfs4_fs.h

/*
 * linux/fs/nfs/nfs4_fs.h
 *
 * Copyright (C) 2005 Trond Myklebust
 *
 * NFSv4-specific filesystem definitions and declarations
 */

#ifndef __LINUX_FS_NFS_NFS4_FS_H
#define __LINUX_FS_NFS_NFS4_FS_H

#ifdef CONFIG_NFS_V4

struct idmap;

/*
 * In a seqid-mutating op, this macro controls which error return
 * values trigger incrementation of the seqid.
 *
 * from rfc 3010:
 * The client MUST monotonically increment the sequence number for the
 * CLOSE, LOCK, LOCKU, OPEN, OPEN_CONFIRM, and OPEN_DOWNGRADE
 * operations.  This is true even in the event that the previous
 * operation that used the sequence number received an error.  The only
 * exception to this rule is if the previous operation received one of
 * the following errors: NFSERR_STALE_CLIENTID, NFSERR_STALE_STATEID,
 * NFSERR_BAD_STATEID, NFSERR_BAD_SEQID, NFSERR_BADXDR,
 * NFSERR_RESOURCE, NFSERR_NOFILEHANDLE.
 *
 */
#define seqid_mutating_err(err)       \
(((err) != NFSERR_STALE_CLIENTID) &&  \
 ((err) != NFSERR_STALE_STATEID)  &&  \
 ((err) != NFSERR_BAD_STATEID)    &&  \
 ((err) != NFSERR_BAD_SEQID)      &&  \
 ((err) != NFSERR_BAD_XDR)        &&  \
 ((err) != NFSERR_RESOURCE)       &&  \
 ((err) != NFSERR_NOFILEHANDLE))

enum nfs4_client_state {
	NFS4CLNT_MANAGER_RUNNING  = 0,
	NFS4CLNT_CHECK_LEASE,
	NFS4CLNT_LEASE_EXPIRED,
	NFS4CLNT_RECLAIM_REBOOT,
	NFS4CLNT_RECLAIM_NOGRACE,
	NFS4CLNT_DELEGRETURN,
	NFS4CLNT_SESSION_RESET,
};

/*
 * struct rpc_sequence ensures that RPC calls are sent in the exact
 * order that they appear on the list.
 */
struct rpc_sequence {
	struct rpc_wait_queue	wait;	/* RPC call delay queue */
	spinlock_t lock;		/* Protects the list */
	struct list_head list;		/* Defines sequence of RPC calls */
};

#define NFS_SEQID_CONFIRMED 1
struct nfs_seqid_counter {
	struct rpc_sequence *sequence;
	int flags;
	u32 counter;
};

struct nfs_seqid {
	struct nfs_seqid_counter *sequence;
	struct list_head list;
};

static inline void nfs_confirm_seqid(struct nfs_seqid_counter *seqid, int status)
{
	if (seqid_mutating_err(-status))
		seqid->flags |= NFS_SEQID_CONFIRMED;
}

struct nfs_unique_id {
	struct rb_node rb_node;
	__u64 id;
};

/*
 * NFS4 state_owners and lock_owners are simply labels for ordered
 * sequences of RPC calls. Their sole purpose is to provide once-only
 * semantics by allowing the server to identify replayed requests.
 */
struct nfs4_state_owner {
	struct nfs_unique_id so_owner_id;
	struct nfs_client    *so_client;
	struct nfs_server    *so_server;
	struct rb_node	     so_client_node;

	struct rpc_cred	     *so_cred;	 /* Associated cred */

	spinlock_t	     so_lock;
	atomic_t	     so_count;
	unsigned long	     so_flags;
	struct list_head     so_states;
	struct list_head     so_delegations;
	struct nfs_seqid_counter so_seqid;
	struct rpc_sequence  so_sequence;
};

enum {
	NFS_OWNER_RECLAIM_REBOOT,
	NFS_OWNER_RECLAIM_NOGRACE
};

/*
 * struct nfs4_state maintains the client-side state for a given
 * (state_owner,inode) tuple (OPEN) or state_owner (LOCK).
 *
 * OPEN:
 * In order to know when to OPEN_DOWNGRADE or CLOSE the state on the server,
 * we need to know how many files are open for reading or writing on a
 * given inode. This information too is stored here.
 *
 * LOCK: one nfs4_state (LOCK) to hold the lock stateid nfs4_state(OPEN)
 */

struct nfs4_lock_state {
	struct list_head	ls_locks;	/* Other lock stateids */
	struct nfs4_state *	ls_state;	/* Pointer to open state */
	fl_owner_t		ls_owner;	/* POSIX lock owner */
#define NFS_LOCK_INITIALIZED 1
	int			ls_flags;
	struct nfs_seqid_counter	ls_seqid;
	struct rpc_sequence	ls_sequence;
	struct nfs_unique_id	ls_id;
	nfs4_stateid		ls_stateid;
	atomic_t		ls_count;
};

/* bits for nfs4_state->flags */
enum {
	LK_STATE_IN_USE,
	NFS_DELEGATED_STATE,		/* Current stateid is delegation */
	NFS_O_RDONLY_STATE,		/* OPEN stateid has read-only state */
	NFS_O_WRONLY_STATE,		/* OPEN stateid has write-only state */
	NFS_O_RDWR_STATE,		/* OPEN stateid has read/write state */
	NFS_STATE_RECLAIM_REBOOT,	/* OPEN stateid server rebooted */
	NFS_STATE_RECLAIM_NOGRACE,	/* OPEN stateid needs to recover state */
};

struct nfs4_state {
	struct list_head open_states;	/* List of states for the same state_owner */
	struct list_head inode_states;	/* List of states for the same inode */
	struct list_head lock_states;	/* List of subservient lock stateids */

	struct nfs4_state_owner *owner;	/* Pointer to the open owner */
	struct inode *inode;		/* Pointer to the inode */

	unsigned long flags;		/* Do we hold any locks? */
	spinlock_t state_lock;		/* Protects the lock_states list */

	seqlock_t seqlock;		/* Protects the stateid/open_stateid */
	nfs4_stateid stateid;		/* Current stateid: may be delegation */
	nfs4_stateid open_stateid;	/* OPEN stateid */

	/* The following 3 fields are protected by owner->so_lock */
	unsigned int n_rdonly;		/* Number of read-only references */
	unsigned int n_wronly;		/* Number of write-only references */
	unsigned int n_rdwr;		/* Number of read/write references */
	fmode_t state;			/* State on the server (R,W, or RW) */
	atomic_t count;
};


struct nfs4_exception {
	long timeout;
	int retry;
	struct nfs4_state *state;
};

struct nfs4_state_recovery_ops {
	int owner_flag_bit;
	int state_flag_bit;
	int (*recover_open)(struct nfs4_state_owner *, struct nfs4_state *);
	int (*recover_lock)(struct nfs4_state *, struct file_lock *);
	int (*establish_clid)(struct nfs_client *, struct rpc_cred *);
	struct rpc_cred * (*get_clid_cred)(struct nfs_client *);
};

struct nfs4_state_maintenance_ops {
	int (*sched_state_renewal)(struct nfs_client *, struct rpc_cred *);
	struct rpc_cred * (*get_state_renewal_cred_locked)(struct nfs_client *);
	int (*renew_lease)(struct nfs_client *, struct rpc_cred *);
};

extern const struct dentry_operations nfs4_dentry_operations;
extern const struct inode_operations nfs4_dir_inode_operations;

/* inode.c */
extern ssize_t nfs4_getxattr(struct dentry *, const char *, void *, size_t);
extern int nfs4_setxattr(struct dentry *, const char *, const void *, size_t, int);
extern ssize_t nfs4_listxattr(struct dentry *, char *, size_t);


/* nfs4proc.c */
extern int nfs4_proc_setclientid(struct nfs_client *, u32, unsigned short, struct rpc_cred *);
extern int nfs4_proc_setclientid_confirm(struct nfs_client *, struct rpc_cred *);
extern int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred);
extern int nfs4_proc_async_renew(struct nfs_client *, struct rpc_cred *);
extern int nfs4_proc_renew(struct nfs_client *, struct rpc_cred *);
extern int nfs4_init_clientid(struct nfs_client *, struct rpc_cred *);
extern int nfs41_init_clientid(struct nfs_client *, struct rpc_cred *);
extern int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait);
extern struct dentry *nfs4_atomic_open(struct inode *, struct dentry *, struct nameidata *);
extern int nfs4_open_revalidate(struct inode *, struct dentry *, int, struct nameidata *);
extern int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle);
extern int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
		struct nfs4_fs_locations *fs_locations, struct page *page);

extern struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[];
extern struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[];
#if defined(CONFIG_NFS_V4_1)
extern int nfs4_setup_sequence(struct nfs_client *clp,
		struct nfs4_sequence_args *args, struct nfs4_sequence_res *res,
		int cache_reply, struct rpc_task *task);
extern void nfs4_destroy_session(struct nfs4_session *session);
extern struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp);
extern int nfs4_proc_create_session(struct nfs_client *, int reset);
extern int nfs4_proc_destroy_session(struct nfs4_session *);
extern int nfs4_init_session(struct nfs_server *server);
#else /* CONFIG_NFS_v4_1 */
static inline int nfs4_setup_sequence(struct nfs_client *clp,
		struct nfs4_sequence_args *args, struct nfs4_sequence_res *res,
		int cache_reply, struct rpc_task *task)
{
	return 0;
}

static inline int nfs4_init_session(struct nfs_server *server)
{
	return 0;
}
#endif /* CONFIG_NFS_V4_1 */

extern struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[];

extern const u32 nfs4_fattr_bitmap[2];
extern const u32 nfs4_statfs_bitmap[2];
extern const u32 nfs4_pathconf_bitmap[2];
extern const u32 nfs4_fsinfo_bitmap[2];
extern const u32 nfs4_fs_locations_bitmap[2];

/* nfs4renewd.c */
extern void nfs4_schedule_state_renewal(struct nfs_client *);
extern void nfs4_renewd_prepare_shutdown(struct nfs_server *);
extern void nfs4_kill_renewd(struct nfs_client *);
extern void nfs4_renew_state(struct work_struct *);

/* nfs4state.c */
struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp);
struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp);
#if defined(CONFIG_NFS_V4_1)
struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp);
struct rpc_cred *nfs4_get_exchange_id_cred(struct nfs_client *clp);
#endif /* CONFIG_NFS_V4_1 */

extern struct nfs4_state_owner * nfs4_get_state_owner(struct nfs_server *, struct rpc_cred *);
extern void nfs4_put_state_owner(struct nfs4_state_owner *);
extern struct nfs4_state * nfs4_get_open_state(struct inode *, struct nfs4_state_owner *);
extern void nfs4_put_open_state(struct nfs4_state *);
extern void nfs4_close_state(struct path *, struct nfs4_state *, fmode_t);
extern void nfs4_close_sync(struct path *, struct nfs4_state *, fmode_t);
extern void nfs4_state_set_mode_locked(struct nfs4_state *, fmode_t);
extern void nfs4_schedule_state_recovery(struct nfs_client *);
extern void nfs4_schedule_state_manager(struct nfs_client *);
extern int nfs4_state_mark_reclaim_nograce(struct nfs_client *clp, struct nfs4_state *state);
extern void nfs4_put_lock_state(struct nfs4_lock_state *lsp);
extern int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl);
extern void nfs4_copy_stateid(nfs4_stateid *, struct nfs4_state *, fl_owner_t);

extern struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter);
extern int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task);
extern void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid);
extern void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid);
extern void nfs_free_seqid(struct nfs_seqid *seqid);

extern const nfs4_stateid zero_stateid;

/* nfs4xdr.c */
extern __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus);
extern struct rpc_procinfo nfs4_procedures[];

struct nfs4_mount_data;

/* callback_xdr.c */
extern struct svc_version nfs4_callback_version1;

#else

#define nfs4_close_state(a, b, c) do { } while (0)
#define nfs4_close_sync(a, b, c) do { } while (0)

#endif /* CONFIG_NFS_V4 */
#endif /* __LINUX_FS_NFS_NFS4_FS.H */
Commit	Line	Data
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
	16	/*
	17	* In a seqid-mutating op, this macro controls which error return
	18	* values trigger incrementation of the seqid.
	19	*
	20	* from rfc 3010:
	21	* The client MUST monotonically increment the sequence number for the
	22	* CLOSE, LOCK, LOCKU, OPEN, OPEN_CONFIRM, and OPEN_DOWNGRADE
	23	* operations. This is true even in the event that the previous
	24	* operation that used the sequence number received an error. The only
	25	* exception to this rule is if the previous operation received one of
	26	* the following errors: NFSERR_STALE_CLIENTID, NFSERR_STALE_STATEID,
	27	* NFSERR_BAD_STATEID, NFSERR_BAD_SEQID, NFSERR_BADXDR,
	28	* NFSERR_RESOURCE, NFSERR_NOFILEHANDLE.
	29	*
	30	*/
	31	#define seqid_mutating_err(err) \
	32	(((err) != NFSERR_STALE_CLIENTID) && \
	33	((err) != NFSERR_STALE_STATEID) && \
	34	((err) != NFSERR_BAD_STATEID) && \
	35	((err) != NFSERR_BAD_SEQID) && \
	36	((err) != NFSERR_BAD_XDR) && \
	37	((err) != NFSERR_RESOURCE) && \
	38	((err) != NFSERR_NOFILEHANDLE))
	39
	40	enum nfs4_client_state {
e005e804	41	NFS4CLNT_MANAGER_RUNNING = 0,
e598d843	42	NFS4CLNT_CHECK_LEASE,
58d9714a	43	NFS4CLNT_LEASE_EXPIRED,
b79a4a1b TM	44	NFS4CLNT_RECLAIM_REBOOT,
b79a4a1b TM	45	NFS4CLNT_RECLAIM_NOGRACE,
707fb4b3	46	NFS4CLNT_DELEGRETURN,
6df08189	47	NFS4CLNT_SESSION_RESET,
4ce79717 TM	48	};
4ce79717 TM	49
cee54fc9 TM	50	/*
	51	* struct rpc_sequence ensures that RPC calls are sent in the exact
	52	* order that they appear on the list.
	53	*/
	54	struct rpc_sequence {
	55	struct rpc_wait_queue wait; /* RPC call delay queue */
	56	spinlock_t lock; /* Protects the list */
	57	struct list_head list; /* Defines sequence of RPC calls */
	58	};
	59
	60	#define NFS_SEQID_CONFIRMED 1
	61	struct nfs_seqid_counter {
	62	struct rpc_sequence *sequence;
	63	int flags;
	64	u32 counter;
	65	};
	66
	67	struct nfs_seqid {
cee54fc9	68	struct nfs_seqid_counter *sequence;
4e51336a	69	struct list_head list;
cee54fc9 TM	70	};
	71
	72	static inline void nfs_confirm_seqid(struct nfs_seqid_counter *seqid, int status)
	73	{
	74	if (seqid_mutating_err(-status))
	75	seqid->flags \|= NFS_SEQID_CONFIRMED;
	76	}
	77
9f958ab8 TM	78	struct nfs_unique_id {
	79	struct rb_node rb_node;
	80	__u64 id;
	81	};
	82
4ce79717 TM	83	/*
	84	* NFS4 state_owners and lock_owners are simply labels for ordered
	85	* sequences of RPC calls. Their sole purpose is to provide once-only
	86	* semantics by allowing the server to identify replayed requests.
4ce79717 TM	87	*/
4ce79717 TM	88	struct nfs4_state_owner {
9f958ab8	89	struct nfs_unique_id so_owner_id;
adfa6f98	90	struct nfs_client *so_client;
6f2e64d3	91	struct nfs_server *so_server;
9f958ab8	92	struct rb_node so_client_node;
4ce79717 TM	93
4ce79717 TM	94	struct rpc_cred so_cred; / Associated cred */
9f958ab8 TM	95
	96	spinlock_t so_lock;
	97	atomic_t so_count;
7eff03ae	98	unsigned long so_flags;
4ce79717 TM	99	struct list_head so_states;
4ce79717 TM	100	struct list_head so_delegations;
cee54fc9 TM	101	struct nfs_seqid_counter so_seqid;
cee54fc9 TM	102	struct rpc_sequence so_sequence;
4ce79717 TM	103	};
4ce79717 TM	104
7eff03ae TM	105	enum {
	106	NFS_OWNER_RECLAIM_REBOOT,
	107	NFS_OWNER_RECLAIM_NOGRACE
	108	};
	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
	122	struct nfs4_lock_state {
	123	struct list_head ls_locks; /* Other lock stateids */
8d0a8a9d	124	struct nfs4_state * ls_state; /* Pointer to open state */
4ce79717 TM	125	fl_owner_t ls_owner; /* POSIX lock owner */
	126	#define NFS_LOCK_INITIALIZED 1
	127	int ls_flags;
cee54fc9	128	struct nfs_seqid_counter ls_seqid;
d0dc3701	129	struct rpc_sequence ls_sequence;
9f958ab8	130	struct nfs_unique_id ls_id;
4ce79717 TM	131	nfs4_stateid ls_stateid;
	132	atomic_t ls_count;
	133	};
	134
	135	/* bits for nfs4_state->flags */
	136	enum {
	137	LK_STATE_IN_USE,
003707c7 TM	138	NFS_DELEGATED_STATE, /* Current stateid is delegation */
	139	NFS_O_RDONLY_STATE, /* OPEN stateid has read-only state */
	140	NFS_O_WRONLY_STATE, /* OPEN stateid has write-only state */
	141	NFS_O_RDWR_STATE, /* OPEN stateid has read/write state */
b79a4a1b TM	142	NFS_STATE_RECLAIM_REBOOT, /* OPEN stateid server rebooted */
b79a4a1b TM	143	NFS_STATE_RECLAIM_NOGRACE, /* OPEN stateid needs to recover state */
4ce79717 TM	144	};
	145
	146	struct nfs4_state {
	147	struct list_head open_states; /* List of states for the same state_owner */
	148	struct list_head inode_states; /* List of states for the same inode */
	149	struct list_head lock_states; /* List of subservient lock stateids */
	150
	151	struct nfs4_state_owner owner; / Pointer to the open owner */
	152	struct inode inode; / Pointer to the inode */
	153
	154	unsigned long flags; /* Do we hold any locks? */
8d0a8a9d	155	spinlock_t state_lock; /* Protects the lock_states list */
4ce79717	156
8bda4e4c	157	seqlock_t seqlock; /* Protects the stateid/open_stateid */
003707c7 TM	158	nfs4_stateid stateid; /* Current stateid: may be delegation */
003707c7 TM	159	nfs4_stateid open_stateid; /* OPEN stateid */
4ce79717	160
8bda4e4c	161	/* The following 3 fields are protected by owner->so_lock */
003707c7 TM	162	unsigned int n_rdonly; /* Number of read-only references */
	163	unsigned int n_wronly; /* Number of write-only references */
	164	unsigned int n_rdwr; /* Number of read/write references */
dc0b027d	165	fmode_t state; /* State on the server (R,W, or RW) */
4ce79717 TM	166	atomic_t count;
	167	};
	168
	169
	170	struct nfs4_exception {
	171	long timeout;
	172	int retry;
9e33bed5	173	struct nfs4_state *state;
4ce79717 TM	174	};
	175
	176	struct nfs4_state_recovery_ops {
7eff03ae	177	int owner_flag_bit;
b79a4a1b	178	int state_flag_bit;
4ce79717 TM	179	int (recover_open)(struct nfs4_state_owner , struct nfs4_state *);
4ce79717 TM	180	int (recover_lock)(struct nfs4_state , struct file_lock *);
591d71cb	181	int (establish_clid)(struct nfs_client , struct rpc_cred *);
90a16617	182	struct rpc_cred * (get_clid_cred)(struct nfs_client );
4ce79717 TM	183	};
4ce79717 TM	184
29fba38b BH	185	struct nfs4_state_maintenance_ops {
29fba38b BH	186	int (sched_state_renewal)(struct nfs_client , struct rpc_cred *);
a7b72103	187	struct rpc_cred * (get_state_renewal_cred_locked)(struct nfs_client );
8e69514f	188	int (renew_lease)(struct nfs_client , struct rpc_cred *);
29fba38b BH	189	};
29fba38b BH	190
f786aa90	191	extern const struct dentry_operations nfs4_dentry_operations;
92e1d5be	192	extern const struct inode_operations nfs4_dir_inode_operations;
6b3b5496 BF	193
	194	/* inode.c */
	195	extern ssize_t nfs4_getxattr(struct dentry , const char , void *, size_t);
	196	extern int nfs4_setxattr(struct dentry , const char , const void *, size_t, int);
	197	extern ssize_t nfs4_listxattr(struct dentry , char , size_t);
	198
4ce79717 TM	199
4ce79717 TM	200	/* nfs4proc.c */
adfa6f98 DH	201	extern int nfs4_proc_setclientid(struct nfs_client , u32, unsigned short, struct rpc_cred );
adfa6f98 DH	202	extern int nfs4_proc_setclientid_confirm(struct nfs_client , struct rpc_cred );
4d643d1d	203	extern int nfs4_proc_exchange_id(struct nfs_client clp, struct rpc_cred cred);
adfa6f98 DH	204	extern int nfs4_proc_async_renew(struct nfs_client , struct rpc_cred );
adfa6f98 DH	205	extern int nfs4_proc_renew(struct nfs_client , struct rpc_cred );
591d71cb	206	extern int nfs4_init_clientid(struct nfs_client , struct rpc_cred );
4d643d1d	207	extern int nfs41_init_clientid(struct nfs_client , struct rpc_cred );
a49c3c77	208	extern int nfs4_do_close(struct path path, struct nfs4_state state, int wait);
02a913a7 TM	209	extern struct dentry nfs4_atomic_open(struct inode , struct dentry , struct nameidata );
02a913a7 TM	210	extern int nfs4_open_revalidate(struct inode , struct dentry , int, struct nameidata *);
55a97593	211	extern int nfs4_server_capabilities(struct nfs_server server, struct nfs_fh fhandle);
56659e99	212	extern int nfs4_proc_fs_locations(struct inode dir, const struct qstr name,
7aaa0b3b	213	struct nfs4_fs_locations fs_locations, struct page page);
4ce79717	214
591d71cb AA	215	extern struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[];
591d71cb AA	216	extern struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[];
557134a3	217	#if defined(CONFIG_NFS_V4_1)
fbcd4abc AA	218	extern int nfs4_setup_sequence(struct nfs_client *clp,
	219	struct nfs4_sequence_args args, struct nfs4_sequence_res res,
	220	int cache_reply, struct rpc_task *task);
557134a3 AA	221	extern void nfs4_destroy_session(struct nfs4_session *session);
557134a3 AA	222	extern struct nfs4_session nfs4_alloc_session(struct nfs_client clp);
76db6d95	223	extern int nfs4_proc_create_session(struct nfs_client *, int reset);
c3fad1b1	224	extern int nfs4_proc_destroy_session(struct nfs4_session *);
fccba804	225	extern int nfs4_init_session(struct nfs_server *server);
fbcd4abc AA	226	#else /* CONFIG_NFS_v4_1 */
	227	static inline int nfs4_setup_sequence(struct nfs_client *clp,
	228	struct nfs4_sequence_args args, struct nfs4_sequence_res res,
	229	int cache_reply, struct rpc_task *task)
	230	{
	231	return 0;
	232	}
fccba804 TM	233
	234	static inline int nfs4_init_session(struct nfs_server *server)
	235	{
	236	return 0;
	237	}
557134a3	238	#endif /* CONFIG_NFS_V4_1 */
4ce79717	239
29fba38b BH	240	extern struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[];
29fba38b BH	241
4ce79717 TM	242	extern const u32 nfs4_fattr_bitmap[2];
	243	extern const u32 nfs4_statfs_bitmap[2];
	244	extern const u32 nfs4_pathconf_bitmap[2];
	245	extern const u32 nfs4_fsinfo_bitmap[2];
830b8e33	246	extern const u32 nfs4_fs_locations_bitmap[2];
4ce79717 TM	247
4ce79717 TM	248	/* nfs4renewd.c */
adfa6f98	249	extern void nfs4_schedule_state_renewal(struct nfs_client *);
4ce79717	250	extern void nfs4_renewd_prepare_shutdown(struct nfs_server *);
adfa6f98	251	extern void nfs4_kill_renewd(struct nfs_client *);
65f27f38	252	extern void nfs4_renew_state(struct work_struct *);
4ce79717 TM	253
4ce79717 TM	254	/* nfs4state.c */
a7b72103	255	struct rpc_cred nfs4_get_setclientid_cred(struct nfs_client clp);
6dc9d57a	256	struct rpc_cred nfs4_get_renew_cred_locked(struct nfs_client clp);
a7b72103 AA	257	#if defined(CONFIG_NFS_V4_1)
a7b72103 AA	258	struct rpc_cred nfs4_get_machine_cred_locked(struct nfs_client clp);
b4b82607	259	struct rpc_cred nfs4_get_exchange_id_cred(struct nfs_client clp);
a7b72103	260	#endif /* CONFIG_NFS_V4_1 */
4ce79717 TM	261
	262	extern struct nfs4_state_owner * nfs4_get_state_owner(struct nfs_server , struct rpc_cred );
	263	extern void nfs4_put_state_owner(struct nfs4_state_owner *);
4ce79717 TM	264	extern struct nfs4_state * nfs4_get_open_state(struct inode , struct nfs4_state_owner );
4ce79717 TM	265	extern void nfs4_put_open_state(struct nfs4_state *);
dc0b027d TM	266	extern void nfs4_close_state(struct path , struct nfs4_state , fmode_t);
	267	extern void nfs4_close_sync(struct path , struct nfs4_state , fmode_t);
	268	extern void nfs4_state_set_mode_locked(struct nfs4_state *, fmode_t);
adfa6f98	269	extern void nfs4_schedule_state_recovery(struct nfs_client *);
b0d3ded1	270	extern void nfs4_schedule_state_manager(struct nfs_client *);
9e33bed5	271	extern int nfs4_state_mark_reclaim_nograce(struct nfs_client clp, struct nfs4_state state);
faf5f49c	272	extern void nfs4_put_lock_state(struct nfs4_lock_state *lsp);
8d0a8a9d	273	extern int nfs4_set_lock_state(struct nfs4_state state, struct file_lock fl);
4ce79717 TM	274	extern void nfs4_copy_stateid(nfs4_stateid , struct nfs4_state , fl_owner_t);
4ce79717 TM	275
cee54fc9 TM	276	extern struct nfs_seqid nfs_alloc_seqid(struct nfs_seqid_counter counter);
	277	extern int nfs_wait_on_sequence(struct nfs_seqid seqid, struct rpc_task task);
	278	extern void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid);
	279	extern void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid);
	280	extern void nfs_free_seqid(struct nfs_seqid *seqid);
	281
4ce79717 TM	282	extern const nfs4_stateid zero_stateid;
	283
	284	/* nfs4xdr.c */
0dbb4c67	285	extern __be32 nfs4_decode_dirent(__be32 p, struct nfs_entry *entry, int plus);
4ce79717 TM	286	extern struct rpc_procinfo nfs4_procedures[];
	287
	288	struct nfs4_mount_data;
	289
	290	/* callback_xdr.c */
	291	extern struct svc_version nfs4_callback_version1;
	292
	293	#else
	294
4a35bd41	295	#define nfs4_close_state(a, b, c) do { } while (0)
e9a40458	296	#define nfs4_close_sync(a, b, c) do { } while (0)
4ce79717 TM	297
	298	#endif /* CONFIG_NFS_V4 */
	299	#endif /* __LINUX_FS_NFS_NFS4_FS.H */