diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-25 12:33:49 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-25 12:33:49 -0700 |
commit | 6f97b220f414e3599ea5374905ba6d0dc47d63b0 (patch) | |
tree | 79b268ea6efcd417d923fdbc1aed7bc0fce15554 /drivers/md/dm-log.h | |
parent | 4b7227ca321ccf447cdc04538687c895db8b77f5 (diff) | |
parent | e3dcc5a387fc38e9c3c6c4f857cd9a7f71a8553a (diff) |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dm
* git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dm: (24 commits)
dm crypt: add documentation
dm: remove md argument from specific_minor
dm table: remove unused dm_create_error_table
dm table: drop void suspend_targets return
dm: unplug queues in threads
dm raid1: use timer
dm: move include files
dm kcopyd: rename
dm: expose macros
dm kcopyd: remove redundant client counting
dm kcopyd: private mempool
dm kcopyd: per device
dm log: make module use tracking internal
dm log: move register functions
dm log: clean interface
dm kcopyd: clean interface
dm io: clean interface
dm io: rename error to error_bits
dm snapshot: store pointer to target instance
dm log: move dirty region log code into separate module
...
Diffstat (limited to 'drivers/md/dm-log.h')
-rw-r--r-- | drivers/md/dm-log.h | 131 |
1 files changed, 0 insertions, 131 deletions
diff --git a/drivers/md/dm-log.h b/drivers/md/dm-log.h deleted file mode 100644 index 3fae87eb596..00000000000 --- a/drivers/md/dm-log.h +++ /dev/null @@ -1,131 +0,0 @@ -/* - * Copyright (C) 2003 Sistina Software - * - * This file is released under the LGPL. - */ - -#ifndef DM_DIRTY_LOG -#define DM_DIRTY_LOG - -#include "dm.h" - -typedef sector_t region_t; - -struct dirty_log_type; - -struct dirty_log { - struct dirty_log_type *type; - void *context; -}; - -struct dirty_log_type { - struct list_head list; - const char *name; - struct module *module; - unsigned int use_count; - - int (*ctr)(struct dirty_log *log, struct dm_target *ti, - unsigned int argc, char **argv); - void (*dtr)(struct 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); - - /* - * Retrieves the smallest size of region that the log can - * deal with. - */ - uint32_t (*get_region_size)(struct 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); - - /* - * Returns: 0, 1, -EWOULDBLOCK, < 0 - * - * A predicate function to check the area given by - * [sector, sector + len) is in sync. - * - * If -EWOULDBLOCK is returned the state of the region is - * unknown, typically this will result in a read being - * 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); - - /* - * Flush the current log state (eg, to disk). This - * function may block. - */ - int (*flush)(struct dirty_log *log); - - /* - * Mark an area as clean or dirty. These functions may - * block, though for performance reasons blocking should - * 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); - - /* - * Returns: <0 (error), 0 (no region), 1 (region) - * - * The mirrord will need perform recovery on regions of - * the mirror that are in the NOSYNC state. This - * function asks the log to tell the caller about the - * next region that this machine should recover. - * - * Do not confuse this function with 'in_sync()', one - * tells you if an area is synchronised, the other - * assigns recovery work. - */ - int (*get_resync_work)(struct 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, - region_t region, int in_sync); - - /* - * Returns the number of regions that are in sync. - */ - region_t (*get_sync_count)(struct 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 dm_register_dirty_log_type(struct dirty_log_type *type); -int dm_unregister_dirty_log_type(struct 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); - -#endif |