diff options
Diffstat (limited to 'drivers/md/dm-log.h')
| -rw-r--r-- | drivers/md/dm-log.h | 84 |
1 files changed, 43 insertions, 41 deletions
diff --git a/drivers/md/dm-log.h b/drivers/md/dm-log.h index 3fae87eb596..2da48a857cb 100644 --- a/drivers/md/dm-log.h +++ b/drivers/md/dm-log.h @@ -1,52 +1,58 @@ /* * Copyright (C) 2003 Sistina Software + * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved. + * + * Device-Mapper dirty region log. * * This file is released under the LGPL. */ -#ifndef DM_DIRTY_LOG -#define DM_DIRTY_LOG +#ifndef _LINUX_DM_DIRTY_LOG +#define _LINUX_DM_DIRTY_LOG + +#ifdef __KERNEL__ -#include "dm.h" +#include <linux/types.h> +#include <linux/device-mapper.h> typedef sector_t region_t; -struct dirty_log_type; +struct dm_dirty_log_type; -struct dirty_log { - struct dirty_log_type *type; +struct dm_dirty_log { + struct dm_dirty_log_type *type; void *context; }; -struct dirty_log_type { +struct dm_dirty_log_type { struct list_head list; const char *name; struct module *module; - unsigned int use_count; + unsigned use_count; - int (*ctr)(struct dirty_log *log, struct dm_target *ti, - unsigned int argc, char **argv); - void (*dtr)(struct dirty_log *log); + int (*ctr)(struct dm_dirty_log *log, struct dm_target *ti, + unsigned argc, char **argv); + void (*dtr)(struct dm_dirty_log *log); /* * There are times when we don't want the log to touch * the disk. */ - int (*presuspend)(struct dirty_log *log); - int (*postsuspend)(struct dirty_log *log); - int (*resume)(struct dirty_log *log); + int (*presuspend)(struct dm_dirty_log *log); + int (*postsuspend)(struct dm_dirty_log *log); + int (*resume)(struct dm_dirty_log *log); /* * Retrieves the smallest size of region that the log can * deal with. */ - uint32_t (*get_region_size)(struct dirty_log *log); + uint32_t (*get_region_size)(struct dm_dirty_log *log); - /* + /* * A predicate to say whether a region is clean or not. * May block. */ - int (*is_clean)(struct dirty_log *log, region_t region); + int (*is_clean)(struct dm_dirty_log *log, region_t region); /* * Returns: 0, 1, -EWOULDBLOCK, < 0 @@ -59,13 +65,14 @@ struct dirty_log_type { * passed to a daemon to deal with, since a daemon is * allowed to block. */ - int (*in_sync)(struct dirty_log *log, region_t region, int can_block); + int (*in_sync)(struct dm_dirty_log *log, region_t region, + int can_block); /* * Flush the current log state (eg, to disk). This * function may block. */ - int (*flush)(struct dirty_log *log); + int (*flush)(struct dm_dirty_log *log); /* * Mark an area as clean or dirty. These functions may @@ -73,8 +80,8 @@ struct dirty_log_type { * be extremely rare (eg, allocating another chunk of * memory for some reason). */ - void (*mark_region)(struct dirty_log *log, region_t region); - void (*clear_region)(struct dirty_log *log, region_t region); + void (*mark_region)(struct dm_dirty_log *log, region_t region); + void (*clear_region)(struct dm_dirty_log *log, region_t region); /* * Returns: <0 (error), 0 (no region), 1 (region) @@ -88,44 +95,39 @@ struct dirty_log_type { * tells you if an area is synchronised, the other * assigns recovery work. */ - int (*get_resync_work)(struct dirty_log *log, region_t *region); + int (*get_resync_work)(struct dm_dirty_log *log, region_t *region); /* * This notifies the log that the resync status of a region * has changed. It also clears the region from the recovering * list (if present). */ - void (*set_region_sync)(struct dirty_log *log, + void (*set_region_sync)(struct dm_dirty_log *log, region_t region, int in_sync); - /* + /* * Returns the number of regions that are in sync. - */ - region_t (*get_sync_count)(struct dirty_log *log); + */ + region_t (*get_sync_count)(struct dm_dirty_log *log); /* * Support function for mirror status requests. */ - int (*status)(struct dirty_log *log, status_type_t status_type, - char *result, unsigned int maxlen); + int (*status)(struct dm_dirty_log *log, status_type_t status_type, + char *result, unsigned maxlen); }; -int dm_register_dirty_log_type(struct dirty_log_type *type); -int dm_unregister_dirty_log_type(struct dirty_log_type *type); - +int dm_dirty_log_type_register(struct dm_dirty_log_type *type); +int dm_dirty_log_type_unregister(struct dm_dirty_log_type *type); /* * Make sure you use these two functions, rather than calling * type->constructor/destructor() directly. */ -struct dirty_log *dm_create_dirty_log(const char *type_name, struct dm_target *ti, - unsigned int argc, char **argv); -void dm_destroy_dirty_log(struct dirty_log *log); - -/* - * init/exit functions. - */ -int dm_dirty_log_init(void); -void dm_dirty_log_exit(void); +struct dm_dirty_log *dm_dirty_log_create(const char *type_name, + struct dm_target *ti, + unsigned argc, char **argv); +void dm_dirty_log_destroy(struct dm_dirty_log *log); -#endif +#endif /* __KERNEL__ */ +#endif /* _LINUX_DM_DIRTY_LOG_H */ |