linux/fs/xfs/scrub/bitmap.h
Darrick J. Wong 0f08af0f9f xfs: move the per-AG datatype bitmaps to separate files
Move struct xagb_bitmap to its own pair of C and header files per
request of Christoph.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
2023-12-15 10:03:30 -08:00

66 lines
2.4 KiB
C

// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2018-2023 Oracle. All Rights Reserved.
* Author: Darrick J. Wong <djwong@kernel.org>
*/
#ifndef __XFS_SCRUB_BITMAP_H__
#define __XFS_SCRUB_BITMAP_H__
/* u64 bitmap */
struct xbitmap64 {
struct rb_root_cached xb_root;
};
void xbitmap64_init(struct xbitmap64 *bitmap);
void xbitmap64_destroy(struct xbitmap64 *bitmap);
int xbitmap64_clear(struct xbitmap64 *bitmap, uint64_t start, uint64_t len);
int xbitmap64_set(struct xbitmap64 *bitmap, uint64_t start, uint64_t len);
int xbitmap64_disunion(struct xbitmap64 *bitmap, struct xbitmap64 *sub);
uint64_t xbitmap64_hweight(struct xbitmap64 *bitmap);
/*
* Return codes for the bitmap iterator functions are 0 to continue iterating,
* and non-zero to stop iterating. Any non-zero value will be passed up to the
* iteration caller. The special value -ECANCELED can be used to stop
* iteration, because neither bitmap iterator ever generates that error code on
* its own. Callers must not modify the bitmap while walking it.
*/
typedef int (*xbitmap64_walk_fn)(uint64_t start, uint64_t len, void *priv);
int xbitmap64_walk(struct xbitmap64 *bitmap, xbitmap64_walk_fn fn,
void *priv);
bool xbitmap64_empty(struct xbitmap64 *bitmap);
bool xbitmap64_test(struct xbitmap64 *bitmap, uint64_t start, uint64_t *len);
/* u32 bitmap */
struct xbitmap32 {
struct rb_root_cached xb_root;
};
void xbitmap32_init(struct xbitmap32 *bitmap);
void xbitmap32_destroy(struct xbitmap32 *bitmap);
int xbitmap32_clear(struct xbitmap32 *bitmap, uint32_t start, uint32_t len);
int xbitmap32_set(struct xbitmap32 *bitmap, uint32_t start, uint32_t len);
int xbitmap32_disunion(struct xbitmap32 *bitmap, struct xbitmap32 *sub);
uint32_t xbitmap32_hweight(struct xbitmap32 *bitmap);
/*
* Return codes for the bitmap iterator functions are 0 to continue iterating,
* and non-zero to stop iterating. Any non-zero value will be passed up to the
* iteration caller. The special value -ECANCELED can be used to stop
* iteration, because neither bitmap iterator ever generates that error code on
* its own. Callers must not modify the bitmap while walking it.
*/
typedef int (*xbitmap32_walk_fn)(uint32_t start, uint32_t len, void *priv);
int xbitmap32_walk(struct xbitmap32 *bitmap, xbitmap32_walk_fn fn,
void *priv);
bool xbitmap32_empty(struct xbitmap32 *bitmap);
bool xbitmap32_test(struct xbitmap32 *bitmap, uint32_t start, uint32_t *len);
#endif /* __XFS_SCRUB_BITMAP_H__ */