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