linux/fs/xfs/scrub/bitmap.h
Darrick J. Wong 608eb3cee7 xfs: replace open-coded bitmap weight logic
Add a xbitmap_hweight helper function so that we can get rid of the
open-coded loop.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
2020-03-18 08:12:23 -07:00

38 lines
1.1 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2018 Oracle. All Rights Reserved.
* Author: Darrick J. Wong <darrick.wong@oracle.com>
*/
#ifndef __XFS_SCRUB_BITMAP_H__
#define __XFS_SCRUB_BITMAP_H__
struct xbitmap_range {
struct list_head list;
uint64_t start;
uint64_t len;
};
struct xbitmap {
struct list_head list;
};
void xbitmap_init(struct xbitmap *bitmap);
void xbitmap_destroy(struct xbitmap *bitmap);
#define for_each_xbitmap_extent(bex, n, bitmap) \
list_for_each_entry_safe((bex), (n), &(bitmap)->list, list)
#define for_each_xbitmap_block(b, bex, n, bitmap) \
list_for_each_entry_safe((bex), (n), &(bitmap)->list, list) \
for ((b) = (bex)->start; (b) < (bex)->start + (bex)->len; (b)++)
int xbitmap_set(struct xbitmap *bitmap, uint64_t start, uint64_t len);
int xbitmap_disunion(struct xbitmap *bitmap, struct xbitmap *sub);
int xbitmap_set_btcur_path(struct xbitmap *bitmap,
struct xfs_btree_cur *cur);
int xbitmap_set_btblocks(struct xbitmap *bitmap,
struct xfs_btree_cur *cur);
uint64_t xbitmap_hweight(struct xbitmap *bitmap);
#endif /* __XFS_SCRUB_BITMAP_H__ */