[deliverable/linux.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,
	NFS4CLNT_RECALL_SLOT,
};

enum nfs4_session_state {
	NFS4_SESSION_DRAINING,
};

/*
 * 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
};

#define NFS_LOCK_NEW		0
#define NFS_LOCK_RECLAIM	1
#define NFS_LOCK_EXPIRED	2

/*
 * 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 */
	NFS_STATE_POSIX_LOCKS,		/* Posix locks are supported */
};

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 *);
	int (*reclaim_complete)(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 *, struct nfs4_setclientid_res *);
extern int nfs4_proc_setclientid_confirm(struct nfs_client *, struct nfs4_setclientid_res *arg, 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, gfp_t gfp_mask, 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)
static inline struct nfs4_session *nfs4_get_session(const struct nfs_server *server)
{
	return server->nfs_client->cl_session;
}

extern int nfs4_setup_sequence(const struct nfs_server *server,
		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 *);
extern int nfs4_proc_destroy_session(struct nfs4_session *);
extern int nfs4_init_session(struct nfs_server *server);
extern int nfs4_proc_get_lease_time(struct nfs_client *clp,
		struct nfs_fsinfo *fsinfo);
#else /* CONFIG_NFS_v4_1 */
static inline struct nfs4_session *nfs4_get_session(const struct nfs_server *server)
{
	return NULL;
}

static inline int nfs4_setup_sequence(const struct nfs_server *server,
		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 int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state);
extern void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags);
extern void nfs41_handle_recall_slot(struct nfs_client *clp);
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, gfp_t gfp_mask);
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_release_seqid(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;
extern struct svc_version nfs4_callback_version4;

#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,
b9efa1b2	48	NFS4CLNT_RECALL_SLOT,
4ce79717 TM	49	};
4ce79717 TM	50
a2118c33 TM	51	enum nfs4_session_state {
	52	NFS4_SESSION_DRAINING,
	53	};
	54
cee54fc9 TM	55	/*
	56	* struct rpc_sequence ensures that RPC calls are sent in the exact
	57	* order that they appear on the list.
	58	*/
	59	struct rpc_sequence {
	60	struct rpc_wait_queue wait; /* RPC call delay queue */
	61	spinlock_t lock; /* Protects the list */
	62	struct list_head list; /* Defines sequence of RPC calls */
	63	};
	64
	65	#define NFS_SEQID_CONFIRMED 1
	66	struct nfs_seqid_counter {
	67	struct rpc_sequence *sequence;
	68	int flags;
	69	u32 counter;
	70	};
	71
	72	struct nfs_seqid {
cee54fc9	73	struct nfs_seqid_counter *sequence;
4e51336a	74	struct list_head list;
cee54fc9 TM	75	};
	76
	77	static inline void nfs_confirm_seqid(struct nfs_seqid_counter *seqid, int status)
	78	{
	79	if (seqid_mutating_err(-status))
	80	seqid->flags \|= NFS_SEQID_CONFIRMED;
	81	}
	82
9f958ab8 TM	83	struct nfs_unique_id {
	84	struct rb_node rb_node;
	85	__u64 id;
	86	};
	87
4ce79717 TM	88	/*
	89	* NFS4 state_owners and lock_owners are simply labels for ordered
	90	* sequences of RPC calls. Their sole purpose is to provide once-only
	91	* semantics by allowing the server to identify replayed requests.
4ce79717 TM	92	*/
4ce79717 TM	93	struct nfs4_state_owner {
9f958ab8	94	struct nfs_unique_id so_owner_id;
adfa6f98	95	struct nfs_client *so_client;
6f2e64d3	96	struct nfs_server *so_server;
9f958ab8	97	struct rb_node so_client_node;
4ce79717 TM	98
4ce79717 TM	99	struct rpc_cred so_cred; / Associated cred */
9f958ab8 TM	100
	101	spinlock_t so_lock;
	102	atomic_t so_count;
7eff03ae	103	unsigned long so_flags;
4ce79717 TM	104	struct list_head so_states;
4ce79717 TM	105	struct list_head so_delegations;
cee54fc9 TM	106	struct nfs_seqid_counter so_seqid;
cee54fc9 TM	107	struct rpc_sequence so_sequence;
4ce79717 TM	108	};
4ce79717 TM	109
7eff03ae TM	110	enum {
	111	NFS_OWNER_RECLAIM_REBOOT,
	112	NFS_OWNER_RECLAIM_NOGRACE
	113	};
	114
afe6c27c AB	115	#define NFS_LOCK_NEW 0
	116	#define NFS_LOCK_RECLAIM 1
	117	#define NFS_LOCK_EXPIRED 2
	118
4ce79717 TM	119	/*
	120	* struct nfs4_state maintains the client-side state for a given
	121	* (state_owner,inode) tuple (OPEN) or state_owner (LOCK).
	122	*
	123	* OPEN:
	124	* In order to know when to OPEN_DOWNGRADE or CLOSE the state on the server,
	125	* we need to know how many files are open for reading or writing on a
	126	* given inode. This information too is stored here.
	127	*
	128	* LOCK: one nfs4_state (LOCK) to hold the lock stateid nfs4_state(OPEN)
	129	*/
	130
	131	struct nfs4_lock_state {
	132	struct list_head ls_locks; /* Other lock stateids */
8d0a8a9d	133	struct nfs4_state * ls_state; /* Pointer to open state */
4ce79717 TM	134	fl_owner_t ls_owner; /* POSIX lock owner */
	135	#define NFS_LOCK_INITIALIZED 1
	136	int ls_flags;
cee54fc9	137	struct nfs_seqid_counter ls_seqid;
d0dc3701	138	struct rpc_sequence ls_sequence;
9f958ab8	139	struct nfs_unique_id ls_id;
4ce79717 TM	140	nfs4_stateid ls_stateid;
	141	atomic_t ls_count;
	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 */
b79a4a1b TM	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 */
003707c7 TM	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;
4ce79717 TM	184	};
	185
	186	struct nfs4_state_recovery_ops {
7eff03ae	187	int owner_flag_bit;
b79a4a1b	188	int state_flag_bit;
4ce79717 TM	189	int (recover_open)(struct nfs4_state_owner , struct nfs4_state *);
4ce79717 TM	190	int (recover_lock)(struct nfs4_state , struct file_lock *);
591d71cb	191	int (establish_clid)(struct nfs_client , struct rpc_cred *);
90a16617	192	struct rpc_cred * (get_clid_cred)(struct nfs_client );
fce5c838	193	int (reclaim_complete)(struct nfs_client );
4ce79717 TM	194	};
4ce79717 TM	195
29fba38b BH	196	struct nfs4_state_maintenance_ops {
29fba38b BH	197	int (sched_state_renewal)(struct nfs_client , struct rpc_cred *);
a7b72103	198	struct rpc_cred * (get_state_renewal_cred_locked)(struct nfs_client );
8e69514f	199	int (renew_lease)(struct nfs_client , struct rpc_cred *);
29fba38b BH	200	};
29fba38b BH	201
f786aa90	202	extern const struct dentry_operations nfs4_dentry_operations;
92e1d5be	203	extern const struct inode_operations nfs4_dir_inode_operations;
6b3b5496 BF	204
	205	/* inode.c */
	206	extern ssize_t nfs4_getxattr(struct dentry , const char , void *, size_t);
	207	extern int nfs4_setxattr(struct dentry , const char , const void *, size_t, int);
	208	extern ssize_t nfs4_listxattr(struct dentry , char , size_t);
	209
4ce79717 TM	210
4ce79717 TM	211	/* nfs4proc.c */
bb8b27e5 TM	212	extern int nfs4_proc_setclientid(struct nfs_client , u32, unsigned short, struct rpc_cred , struct nfs4_setclientid_res *);
bb8b27e5 TM	213	extern int nfs4_proc_setclientid_confirm(struct nfs_client , struct nfs4_setclientid_res arg, struct rpc_cred *);
4d643d1d	214	extern int nfs4_proc_exchange_id(struct nfs_client clp, struct rpc_cred cred);
adfa6f98 DH	215	extern int nfs4_proc_async_renew(struct nfs_client , struct rpc_cred );
adfa6f98 DH	216	extern int nfs4_proc_renew(struct nfs_client , struct rpc_cred );
591d71cb	217	extern int nfs4_init_clientid(struct nfs_client , struct rpc_cred );
4d643d1d	218	extern int nfs41_init_clientid(struct nfs_client , struct rpc_cred );
8535b2be	219	extern int nfs4_do_close(struct path path, struct nfs4_state state, gfp_t gfp_mask, int wait);
02a913a7 TM	220	extern struct dentry nfs4_atomic_open(struct inode , struct dentry , struct nameidata );
02a913a7 TM	221	extern int nfs4_open_revalidate(struct inode , struct dentry , int, struct nameidata *);
55a97593	222	extern int nfs4_server_capabilities(struct nfs_server server, struct nfs_fh fhandle);
56659e99	223	extern int nfs4_proc_fs_locations(struct inode dir, const struct qstr name,
7aaa0b3b	224	struct nfs4_fs_locations fs_locations, struct page page);
4ce79717	225
591d71cb AA	226	extern struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[];
591d71cb AA	227	extern struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[];
557134a3	228	#if defined(CONFIG_NFS_V4_1)
035168ab TM	229	static inline struct nfs4_session nfs4_get_session(const struct nfs_server server)
	230	{
	231	return server->nfs_client->cl_session;
	232	}
	233
	234	extern int nfs4_setup_sequence(const struct nfs_server *server,
fbcd4abc AA	235	struct nfs4_sequence_args args, struct nfs4_sequence_res res,
fbcd4abc AA	236	int cache_reply, struct rpc_task *task);
557134a3 AA	237	extern void nfs4_destroy_session(struct nfs4_session *session);
557134a3 AA	238	extern struct nfs4_session nfs4_alloc_session(struct nfs_client clp);
f26468fb	239	extern int nfs4_proc_create_session(struct nfs_client *);
c3fad1b1	240	extern int nfs4_proc_destroy_session(struct nfs4_session *);
fccba804	241	extern int nfs4_init_session(struct nfs_server *server);
9430fb6b RL	242	extern int nfs4_proc_get_lease_time(struct nfs_client *clp,
9430fb6b RL	243	struct nfs_fsinfo *fsinfo);
fbcd4abc	244	#else /* CONFIG_NFS_v4_1 */
035168ab TM	245	static inline struct nfs4_session nfs4_get_session(const struct nfs_server server)
	246	{
	247	return NULL;
	248	}
	249
	250	static inline int nfs4_setup_sequence(const struct nfs_server *server,
fbcd4abc AA	251	struct nfs4_sequence_args args, struct nfs4_sequence_res res,
	252	int cache_reply, struct rpc_task *task)
	253	{
	254	return 0;
	255	}
fccba804 TM	256
	257	static inline int nfs4_init_session(struct nfs_server *server)
	258	{
	259	return 0;
	260	}
557134a3	261	#endif /* CONFIG_NFS_V4_1 */
4ce79717	262
29fba38b BH	263	extern struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[];
29fba38b BH	264
4ce79717 TM	265	extern const u32 nfs4_fattr_bitmap[2];
	266	extern const u32 nfs4_statfs_bitmap[2];
	267	extern const u32 nfs4_pathconf_bitmap[2];
	268	extern const u32 nfs4_fsinfo_bitmap[2];
830b8e33	269	extern const u32 nfs4_fs_locations_bitmap[2];
4ce79717 TM	270
4ce79717 TM	271	/* nfs4renewd.c */
adfa6f98	272	extern void nfs4_schedule_state_renewal(struct nfs_client *);
4ce79717	273	extern void nfs4_renewd_prepare_shutdown(struct nfs_server *);
adfa6f98	274	extern void nfs4_kill_renewd(struct nfs_client *);
65f27f38	275	extern void nfs4_renew_state(struct work_struct *);
4ce79717 TM	276
4ce79717 TM	277	/* nfs4state.c */
a7b72103	278	struct rpc_cred nfs4_get_setclientid_cred(struct nfs_client clp);
6dc9d57a	279	struct rpc_cred nfs4_get_renew_cred_locked(struct nfs_client clp);
a7b72103 AA	280	#if defined(CONFIG_NFS_V4_1)
a7b72103 AA	281	struct rpc_cred nfs4_get_machine_cred_locked(struct nfs_client clp);
b4b82607	282	struct rpc_cred nfs4_get_exchange_id_cred(struct nfs_client clp);
a7b72103	283	#endif /* CONFIG_NFS_V4_1 */
4ce79717 TM	284
	285	extern struct nfs4_state_owner * nfs4_get_state_owner(struct nfs_server , struct rpc_cred );
	286	extern void nfs4_put_state_owner(struct nfs4_state_owner *);
4ce79717 TM	287	extern struct nfs4_state * nfs4_get_open_state(struct inode , struct nfs4_state_owner );
4ce79717 TM	288	extern void nfs4_put_open_state(struct nfs4_state *);
dc0b027d TM	289	extern void nfs4_close_state(struct path , struct nfs4_state , fmode_t);
	290	extern void nfs4_close_sync(struct path , struct nfs4_state , fmode_t);
	291	extern void nfs4_state_set_mode_locked(struct nfs4_state *, fmode_t);
adfa6f98	292	extern void nfs4_schedule_state_recovery(struct nfs_client *);
b0d3ded1	293	extern void nfs4_schedule_state_manager(struct nfs_client *);
9e33bed5	294	extern int nfs4_state_mark_reclaim_nograce(struct nfs_client clp, struct nfs4_state state);
a2c0b9e2	295	extern int nfs4_state_mark_reclaim_reboot(struct nfs_client clp, struct nfs4_state state);
0629e370	296	extern void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags);
b9efa1b2	297	extern void nfs41_handle_recall_slot(struct nfs_client *clp);
faf5f49c	298	extern void nfs4_put_lock_state(struct nfs4_lock_state *lsp);
8d0a8a9d	299	extern int nfs4_set_lock_state(struct nfs4_state state, struct file_lock fl);
4ce79717 TM	300	extern void nfs4_copy_stateid(nfs4_stateid , struct nfs4_state , fl_owner_t);
4ce79717 TM	301
8535b2be	302	extern struct nfs_seqid nfs_alloc_seqid(struct nfs_seqid_counter counter, gfp_t gfp_mask);
cee54fc9 TM	303	extern int nfs_wait_on_sequence(struct nfs_seqid seqid, struct rpc_task task);
	304	extern void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid);
	305	extern void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid);
72211dbe	306	extern void nfs_release_seqid(struct nfs_seqid *seqid);
cee54fc9 TM	307	extern void nfs_free_seqid(struct nfs_seqid *seqid);
cee54fc9 TM	308
4ce79717 TM	309	extern const nfs4_stateid zero_stateid;
	310
	311	/* nfs4xdr.c */
0dbb4c67	312	extern __be32 nfs4_decode_dirent(__be32 p, struct nfs_entry *entry, int plus);
4ce79717 TM	313	extern struct rpc_procinfo nfs4_procedures[];
	314
	315	struct nfs4_mount_data;
	316
	317	/* callback_xdr.c */
	318	extern struct svc_version nfs4_callback_version1;
07bccc2d	319	extern struct svc_version nfs4_callback_version4;
4ce79717 TM	320
	321	#else
	322
4a35bd41	323	#define nfs4_close_state(a, b, c) do { } while (0)
e9a40458	324	#define nfs4_close_sync(a, b, c) do { } while (0)
4ce79717 TM	325
	326	#endif /* CONFIG_NFS_V4 */
	327	#endif /* __LINUX_FS_NFS_NFS4_FS.H */