mirror of
git://sourceware.org/git/lvm2.git
synced 2025-03-13 00:58:47 +03:00
71 lines
1.5 KiB
C
71 lines
1.5 KiB
C
/*
|
|
* device-mapper.h
|
|
*
|
|
* Copyright (C) 2001 Sistina Software (UK) Limited.
|
|
*
|
|
* This file is released under the GPL.
|
|
*/
|
|
|
|
/*
|
|
* Changelog
|
|
*
|
|
* 14/08/2001 - First version [Joe Thornber]
|
|
*/
|
|
|
|
#ifndef DEVICE_MAPPER_H
|
|
#define DEVICE_MAPPER_H
|
|
|
|
#define DM_DIR "device-mapper"
|
|
#define DM_MAX_TYPE_NAME 16
|
|
|
|
struct dm_table;
|
|
struct dm_dev;
|
|
typedef unsigned int offset_t;
|
|
|
|
typedef void (*dm_error_fn)(const char *message, void *private);
|
|
|
|
/*
|
|
* constructor, destructor and map fn types
|
|
*/
|
|
typedef int (*dm_ctr_fn)(struct dm_table *t, offset_t b, offset_t l,
|
|
char *args, void **context);
|
|
|
|
typedef void (*dm_dtr_fn)(struct dm_table *t, void *c);
|
|
typedef int (*dm_map_fn)(struct buffer_head *bh, int rw, void *context);
|
|
typedef int (*dm_err_fn)(struct buffer_head *bh, int rw, void *context);
|
|
typedef char *(*dm_print_fn)(void *context);
|
|
|
|
/*
|
|
* Contructors should call this to make sure any
|
|
* destination devices are handled correctly
|
|
* (ie. opened/closed).
|
|
*/
|
|
int dm_table_get_device(struct dm_table *t, const char *path,
|
|
offset_t start, offset_t len,
|
|
struct dm_dev **result);
|
|
void dm_table_put_device(struct dm_table *table, struct dm_dev *d);
|
|
|
|
/*
|
|
* information about a target type
|
|
*/
|
|
struct target_type {
|
|
const char *name;
|
|
struct module *module;
|
|
dm_ctr_fn ctr;
|
|
dm_dtr_fn dtr;
|
|
dm_map_fn map;
|
|
dm_err_fn err;
|
|
dm_print_fn print;
|
|
};
|
|
|
|
int dm_register_target(struct target_type *t);
|
|
int dm_unregister_target(struct target_type *t);
|
|
|
|
#endif /* DEVICE_MAPPER_H */
|
|
|
|
/*
|
|
* Local variables:
|
|
* c-file-style: "linux"
|
|
* End:
|
|
*/
|