[linux-2.6-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;

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,
	NFS4CLNT_LEASE_CONFIRM,
	NFS4CLNT_SERVER_SCOPE_MISMATCH,
};

enum nfs4_session_state {
	NFS4_SESSION_INITING,
	NFS4_SESSION_DRAINING,
};

#define NFS4_RENEW_TIMEOUT		0x01
#define NFS4_RENEW_DELEGATION_CB	0x02

struct nfs4_minor_version_ops {
	u32	minor_version;

	int	(*call_sync)(struct rpc_clnt *clnt,
			struct nfs_server *server,
			struct rpc_message *msg,
			struct nfs4_sequence_args *args,
			struct nfs4_sequence_res *res,
			int cache_reply);
	bool	(*match_stateid)(const nfs4_stateid *,
			const nfs4_stateid *);
	int	(*find_root_sec)(struct nfs_server *, struct nfs_fh *,
			struct nfs_fsinfo *);
	const struct nfs4_state_recovery_ops *reboot_recovery_ops;
	const struct nfs4_state_recovery_ops *nograce_recovery_ops;
	const struct nfs4_state_maintenance_ops *state_renewal_ops;
};

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

#define NFS_SEQID_CONFIRMED 1
struct nfs_seqid_counter {
	int owner_id;
	int flags;
	u32 counter;
	spinlock_t lock;		/* Protects the list */
	struct list_head list;		/* Defines sequence of RPC calls */
	struct rpc_wait_queue	wait;	/* RPC call delay queue */
};

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

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

/*
 * 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_server    *so_server;
	struct list_head     so_lru;
	unsigned long        so_expires;
	struct rb_node	     so_server_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 nfs_seqid_counter so_seqid;
};

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_owner {
	unsigned int lo_type;
#define NFS4_ANY_LOCK_TYPE	(0U)
#define NFS4_FLOCK_LOCK_TYPE	(1U << 0)
#define NFS4_POSIX_LOCK_TYPE	(1U << 1)
	union {
		fl_owner_t posix_owner;
		pid_t flock_owner;
	} lo_u;
};

struct nfs4_lock_state {
	struct list_head	ls_locks;	/* Other lock stateids */
	struct nfs4_state *	ls_state;	/* Pointer to open state */
#define NFS_LOCK_INITIALIZED 1
	int			ls_flags;
	struct nfs_seqid_counter	ls_seqid;
	nfs4_stateid		ls_stateid;
	atomic_t		ls_count;
	struct nfs4_lock_owner	ls_owner;
};

/* 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 *, unsigned);
	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;

/* 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_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 nfs4_state *state, gfp_t gfp_mask, int wait, bool roc);
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 void nfs4_release_lockowner(const struct nfs4_lock_state *);
extern const struct xattr_handler *nfs4_xattr_handlers[];

#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 bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy);
extern int nfs4_setup_sequence(const struct nfs_server *server,
		struct nfs4_sequence_args *args, struct nfs4_sequence_res *res,
		struct rpc_task *task);
extern int nfs41_setup_sequence(struct nfs4_session *session,
		struct nfs4_sequence_args *args, struct nfs4_sequence_res *res,
		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);
extern int nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data,
				  bool sync);

static inline bool
is_ds_only_client(struct nfs_client *clp)
{
	return (clp->cl_exchange_flags & EXCHGID4_FLAG_MASK_PNFS) ==
		EXCHGID4_FLAG_USE_PNFS_DS;
}

static inline bool
is_ds_client(struct nfs_client *clp)
{
	return clp->cl_exchange_flags & EXCHGID4_FLAG_USE_PNFS_DS;
}
#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,
		struct rpc_task *task)
{
	return 0;
}

static inline int nfs4_init_session(struct nfs_server *server)
{
	return 0;
}

static inline bool
is_ds_only_client(struct nfs_client *clp)
{
	return false;
}

static inline bool
is_ds_client(struct nfs_client *clp)
{
	return false;
}
#endif /* CONFIG_NFS_V4_1 */

extern const struct nfs4_minor_version_ops *nfs_v4_minor_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[3];
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);
extern void nfs4_schedule_session_recovery(struct nfs4_session *);
#else
static inline void nfs4_schedule_session_recovery(struct nfs4_session *session)
{
}
#endif /* CONFIG_NFS_V4_1 */

extern struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *, struct rpc_cred *, gfp_t);
extern void nfs4_put_state_owner(struct nfs4_state_owner *);
extern void nfs4_purge_state_owners(struct nfs_server *);
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 nfs4_state *, fmode_t);
extern void nfs4_close_sync(struct nfs4_state *, fmode_t);
extern void nfs4_state_set_mode_locked(struct nfs4_state *, fmode_t);
extern void nfs_inode_find_state_and_recover(struct inode *inode,
		const nfs4_stateid *stateid);
extern void nfs4_schedule_lease_recovery(struct nfs_client *);
extern void nfs4_schedule_state_manager(struct nfs_client *);
extern void nfs4_schedule_path_down_recovery(struct nfs_client *clp);
extern void nfs4_schedule_stateid_recovery(const struct nfs_server *, struct nfs4_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 nfs41_handle_server_scope(struct nfs_client *,
				      struct server_scope **);
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_select_rw_stateid(nfs4_stateid *, struct nfs4_state *, fl_owner_t, pid_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 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;

static inline void nfs4_stateid_copy(nfs4_stateid *dst, const nfs4_stateid *src)
{
	memcpy(dst->data, src->data, sizeof(dst->data));
}

static inline bool nfs4_stateid_match(const nfs4_stateid *dst, const nfs4_stateid *src)
{
	return memcmp(dst->data, src->data, sizeof(dst->data)) == 0;
}

#else

#define nfs4_close_state(a, b) do { } while (0)
#define nfs4_close_sync(a, b) 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
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,
b79a4a1b TM	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	};
4ce79717 TM	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,
7c513058 BS	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 *,
fca78d6d BS	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	};
97dc1359 TM	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
cee54fc9 TM	61	struct nfs_seqid_counter {
48c22eb2	62	int owner_id;
cee54fc9 TM	63	int flags;
cee54fc9 TM	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	*/
4ce79717 TM	87	struct nfs4_state_owner {
6f2e64d3	88	struct nfs_server *so_server;
0aaaf5c4 CL	89	struct list_head so_lru;
0aaaf5c4 CL	90	unsigned long so_expires;
24d292b8	91	struct rb_node so_server_node;
4ce79717 TM	92
4ce79717 TM	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	};
4ce79717 TM	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 {
4ce79717 TM	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
4ce79717 TM	138	int ls_flags;
cee54fc9	139	struct nfs_seqid_counter ls_seqid;
4ce79717 TM	140	nfs4_stateid ls_stateid;
4ce79717 TM	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 */
b79a4a1b TM	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 */
003707c7 TM	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 *);
4ce79717 TM	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	};
4ce79717 TM	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	};
29fba38b BH	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 *);
bb8b27e5 TM	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,
dc70d7b3 AA	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);
557134a3 AA	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,
9430fb6b RL	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
4ce79717 TM	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
4ce79717 TM	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)
a7b72103 AA	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 );
4ce79717 TM	316	extern void nfs4_put_open_state(struct nfs4_state *);
643168c2 AV	317	extern void nfs4_close_state(struct nfs4_state *, fmode_t);
643168c2 AV	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,
a1d0b5ee TM	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 *,
78fe0f41 WAA	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);
cee54fc9 TM	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	{
	354	memcpy(dst->data, src->data, sizeof(dst->data));
	355	}
	356
	357	static inline bool nfs4_stateid_match(const nfs4_stateid dst, const nfs4_stateid src)
	358	{
	359	return memcmp(dst->data, src->data, sizeof(dst->data)) == 0;
	360	}
	361
4ce79717 TM	362	#else
4ce79717 TM	363
643168c2 AV	364	#define nfs4_close_state(a, b) do { } while (0)
643168c2 AV	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 */