[deliverable/linux.git] / include / linux / sunrpc / rpc_pipe_fs.h

#ifndef _LINUX_SUNRPC_RPC_PIPE_FS_H
#define _LINUX_SUNRPC_RPC_PIPE_FS_H

#ifdef __KERNEL__

#include <linux/workqueue.h>

struct rpc_pipe_dir_head {
	struct list_head pdh_entries;
	struct dentry *pdh_dentry;
};

struct rpc_pipe_dir_object_ops;
struct rpc_pipe_dir_object {
	struct list_head pdo_head;
	const struct rpc_pipe_dir_object_ops *pdo_ops;

	void *pdo_data;
};

struct rpc_pipe_dir_object_ops {
	int (*create)(struct dentry *dir,
			struct rpc_pipe_dir_object *pdo);
	void (*destroy)(struct dentry *dir,
			struct rpc_pipe_dir_object *pdo);
};

struct rpc_pipe_msg {
	struct list_head list;
	void *data;
	size_t len;
	size_t copied;
	int errno;
};

struct rpc_pipe_ops {
	ssize_t (*upcall)(struct file *, struct rpc_pipe_msg *, char __user *, size_t);
	ssize_t (*downcall)(struct file *, const char __user *, size_t);
	void (*release_pipe)(struct inode *);
	int (*open_pipe)(struct inode *);
	void (*destroy_msg)(struct rpc_pipe_msg *);
};

struct rpc_pipe {
	struct list_head pipe;
	struct list_head in_upcall;
	struct list_head in_downcall;
	int pipelen;
	int nreaders;
	int nwriters;
#define RPC_PIPE_WAIT_FOR_OPEN	1
	int flags;
	struct delayed_work queue_timeout;
	const struct rpc_pipe_ops *ops;
	spinlock_t lock;
	struct dentry *dentry;
};

struct rpc_inode {
	struct inode vfs_inode;
	void *private;
	struct rpc_pipe *pipe;
	wait_queue_head_t waitq;
};

static inline struct rpc_inode *
RPC_I(struct inode *inode)
{
	return container_of(inode, struct rpc_inode, vfs_inode);
}

enum {
	SUNRPC_PIPEFS_NFS_PRIO,
	SUNRPC_PIPEFS_RPC_PRIO,
};

extern int rpc_pipefs_notifier_register(struct notifier_block *);
extern void rpc_pipefs_notifier_unregister(struct notifier_block *);

enum {
	RPC_PIPEFS_MOUNT,
	RPC_PIPEFS_UMOUNT,
};

extern struct dentry *rpc_d_lookup_sb(const struct super_block *sb,
				      const unsigned char *dir_name);
extern int rpc_pipefs_init_net(struct net *net);
extern void rpc_pipefs_exit_net(struct net *net);
extern struct super_block *rpc_get_sb_net(const struct net *net);
extern void rpc_put_sb_net(const struct net *net);

extern ssize_t rpc_pipe_generic_upcall(struct file *, struct rpc_pipe_msg *,
				       char __user *, size_t);
extern int rpc_queue_upcall(struct rpc_pipe *, struct rpc_pipe_msg *);

struct rpc_clnt;
extern struct dentry *rpc_create_client_dir(struct dentry *, const char *, struct rpc_clnt *);
extern int rpc_remove_client_dir(struct rpc_clnt *);

extern void rpc_init_pipe_dir_head(struct rpc_pipe_dir_head *pdh);
extern void rpc_init_pipe_dir_object(struct rpc_pipe_dir_object *pdo,
		const struct rpc_pipe_dir_object_ops *pdo_ops,
		void *pdo_data);
extern int rpc_add_pipe_dir_object(struct net *net,
		struct rpc_pipe_dir_head *pdh,
		struct rpc_pipe_dir_object *pdo);
extern void rpc_remove_pipe_dir_object(struct net *net,
		struct rpc_pipe_dir_head *pdh,
		struct rpc_pipe_dir_object *pdo);
extern struct rpc_pipe_dir_object *rpc_find_or_alloc_pipe_dir_object(
		struct net *net,
		struct rpc_pipe_dir_head *pdh,
		int (*match)(struct rpc_pipe_dir_object *, void *),
		struct rpc_pipe_dir_object *(*alloc)(void *),
		void *data);

struct cache_detail;
extern struct dentry *rpc_create_cache_dir(struct dentry *,
					   const char *,
					   umode_t umode,
					   struct cache_detail *);
extern void rpc_remove_cache_dir(struct dentry *);

extern int rpc_rmdir(struct dentry *dentry);

struct rpc_pipe *rpc_mkpipe_data(const struct rpc_pipe_ops *ops, int flags);
void rpc_destroy_pipe_data(struct rpc_pipe *pipe);
extern struct dentry *rpc_mkpipe_dentry(struct dentry *, const char *, void *,
					struct rpc_pipe *);
extern int rpc_unlink(struct dentry *);
extern int register_rpc_pipefs(void);
extern void unregister_rpc_pipefs(void);

extern bool gssd_running(struct net *net);

#endif
#endif
Commit	Line	Data
1da177e4 LT	1	#ifndef _LINUX_SUNRPC_RPC_PIPE_FS_H
	2	#define _LINUX_SUNRPC_RPC_PIPE_FS_H
	3
	4	#ifdef __KERNEL__
	5
4dceef96 BF	6	#include <linux/workqueue.h>
4dceef96 BF	7
6739ffb7 TM	8	struct rpc_pipe_dir_head {
	9	struct list_head pdh_entries;
	10	struct dentry *pdh_dentry;
	11	};
	12
	13	struct rpc_pipe_dir_object_ops;
	14	struct rpc_pipe_dir_object {
	15	struct list_head pdo_head;
	16	const struct rpc_pipe_dir_object_ops *pdo_ops;
	17
	18	void *pdo_data;
	19	};
	20
	21	struct rpc_pipe_dir_object_ops {
	22	int (create)(struct dentry dir,
	23	struct rpc_pipe_dir_object *pdo);
	24	void (destroy)(struct dentry dir,
	25	struct rpc_pipe_dir_object *pdo);
	26	};
	27
1da177e4 LT	28	struct rpc_pipe_msg {
	29	struct list_head list;
	30	void *data;
	31	size_t len;
	32	size_t copied;
	33	int errno;
	34	};
	35
	36	struct rpc_pipe_ops {
	37	ssize_t (upcall)(struct file , struct rpc_pipe_msg , char __user , size_t);
	38	ssize_t (downcall)(struct file , const char __user *, size_t);
	39	void (release_pipe)(struct inode );
c3810608	40	int (open_pipe)(struct inode );
1da177e4 LT	41	void (destroy_msg)(struct rpc_pipe_msg );
	42	};
	43
ba9e0975	44	struct rpc_pipe {
1da177e4 LT	45	struct list_head pipe;
1da177e4 LT	46	struct list_head in_upcall;
6e84c7b6	47	struct list_head in_downcall;
1da177e4 LT	48	int pipelen;
	49	int nreaders;
	50	int nwriters;
1da177e4 LT	51	#define RPC_PIPE_WAIT_FOR_OPEN 1
1da177e4 LT	52	int flags;
52bad64d	53	struct delayed_work queue_timeout;
b693ba4a	54	const struct rpc_pipe_ops *ops;
766347be	55	spinlock_t lock;
c239d83b	56	struct dentry *dentry;
1da177e4 LT	57	};
1da177e4 LT	58
ba9e0975 SK	59	struct rpc_inode {
	60	struct inode vfs_inode;
	61	void *private;
	62	struct rpc_pipe *pipe;
591ad7fe	63	wait_queue_head_t waitq;
ba9e0975 SK	64	};
ba9e0975 SK	65
1da177e4 LT	66	static inline struct rpc_inode *
	67	RPC_I(struct inode *inode)
	68	{
	69	return container_of(inode, struct rpc_inode, vfs_inode);
	70	}
	71
eee17325 SK	72	enum {
	73	SUNRPC_PIPEFS_NFS_PRIO,
	74	SUNRPC_PIPEFS_RPC_PRIO,
	75	};
	76
2d00131a SK	77	extern int rpc_pipefs_notifier_register(struct notifier_block *);
	78	extern void rpc_pipefs_notifier_unregister(struct notifier_block *);
	79
	80	enum {
	81	RPC_PIPEFS_MOUNT,
	82	RPC_PIPEFS_UMOUNT,
	83	};
	84
432eb1a5 SK	85	extern struct dentry rpc_d_lookup_sb(const struct super_block sb,
432eb1a5 SK	86	const unsigned char *dir_name);
4b9a445e JL	87	extern int rpc_pipefs_init_net(struct net *net);
4b9a445e JL	88	extern void rpc_pipefs_exit_net(struct net *net);
c21a588f SK	89	extern struct super_block rpc_get_sb_net(const struct net net);
c21a588f SK	90	extern void rpc_put_sb_net(const struct net *net);
432eb1a5	91
c1225158 PT	92	extern ssize_t rpc_pipe_generic_upcall(struct file , struct rpc_pipe_msg ,
c1225158 PT	93	char __user *, size_t);
d706ed1f	94	extern int rpc_queue_upcall(struct rpc_pipe , struct rpc_pipe_msg );
1da177e4	95
458adb8b	96	struct rpc_clnt;
a95e691f	97	extern struct dentry rpc_create_client_dir(struct dentry , const char , struct rpc_clnt );
c36dcfe1	98	extern int rpc_remove_client_dir(struct rpc_clnt *);
6739ffb7 TM	99
	100	extern void rpc_init_pipe_dir_head(struct rpc_pipe_dir_head *pdh);
	101	extern void rpc_init_pipe_dir_object(struct rpc_pipe_dir_object *pdo,
	102	const struct rpc_pipe_dir_object_ops *pdo_ops,
	103	void *pdo_data);
	104	extern int rpc_add_pipe_dir_object(struct net *net,
	105	struct rpc_pipe_dir_head *pdh,
	106	struct rpc_pipe_dir_object *pdo);
	107	extern void rpc_remove_pipe_dir_object(struct net *net,
	108	struct rpc_pipe_dir_head *pdh,
	109	struct rpc_pipe_dir_object *pdo);
298fc355 TM	110	extern struct rpc_pipe_dir_object *rpc_find_or_alloc_pipe_dir_object(
	111	struct net *net,
	112	struct rpc_pipe_dir_head *pdh,
	113	int (match)(struct rpc_pipe_dir_object , void *),
	114	struct rpc_pipe_dir_object (alloc)(void *),
	115	void *data);
8854e82d TM	116
	117	struct cache_detail;
	118	extern struct dentry rpc_create_cache_dir(struct dentry ,
a95e691f	119	const char *,
64f1426f	120	umode_t umode,
8854e82d TM	121	struct cache_detail *);
	122	extern void rpc_remove_cache_dir(struct dentry *);
	123
eee17325 SK	124	extern int rpc_rmdir(struct dentry *dentry);
eee17325 SK	125
c239d83b SK	126	struct rpc_pipe rpc_mkpipe_data(const struct rpc_pipe_ops ops, int flags);
	127	void rpc_destroy_pipe_data(struct rpc_pipe *pipe);
	128	extern struct dentry rpc_mkpipe_dentry(struct dentry , const char , void ,
	129	struct rpc_pipe *);
5d67476f	130	extern int rpc_unlink(struct dentry *);
7531d692 TM	131	extern int register_rpc_pipefs(void);
7531d692 TM	132	extern void unregister_rpc_pipefs(void);
1da177e4	133
89f84243 JL	134	extern bool gssd_running(struct net *net);
89f84243 JL	135
1da177e4 LT	136	#endif
1da177e4 LT	137	#endif