69 lines
1.7 KiB
C
69 lines
1.7 KiB
C
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
||
|
|
/*
|
||
|
|
* Copyright (C) 2019 Oracle. All Rights Reserved.
|
||
|
|
* Author: Darrick J. Wong <darrick.wong@oracle.com>
|
||
|
|
*/
|
||
|
|
#ifndef __XFS_SCRUB_ATTR_H__
|
||
|
|
#define __XFS_SCRUB_ATTR_H__
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Temporary storage for online scrub and repair of extended attributes.
|
||
|
|
*/
|
||
|
|
struct xchk_xattr_buf {
|
||
|
|
/* Size of @buf, in bytes. */
|
||
|
|
size_t sz;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Memory buffer -- either used for extracting attr values while
|
||
|
|
* walking the attributes; or for computing attr block bitmaps when
|
||
|
|
* checking the attribute tree.
|
||
|
|
*
|
||
|
|
* Each bitmap contains enough bits to track every byte in an attr
|
||
|
|
* block (rounded up to the size of an unsigned long). The attr block
|
||
|
|
* used space bitmap starts at the beginning of the buffer; the free
|
||
|
|
* space bitmap follows immediately after; and we have a third buffer
|
||
|
|
* for storing intermediate bitmap results.
|
||
|
|
*/
|
||
|
|
uint8_t buf[];
|
||
|
|
};
|
||
|
|
|
||
|
|
/* A place to store attribute values. */
|
||
|
|
static inline uint8_t *
|
||
|
|
xchk_xattr_valuebuf(
|
||
|
|
struct xfs_scrub *sc)
|
||
|
|
{
|
||
|
|
struct xchk_xattr_buf *ab = sc->buf;
|
||
|
|
|
||
|
|
return ab->buf;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* A bitmap of space usage computed by walking an attr leaf block. */
|
||
|
|
static inline unsigned long *
|
||
|
|
xchk_xattr_usedmap(
|
||
|
|
struct xfs_scrub *sc)
|
||
|
|
{
|
||
|
|
struct xchk_xattr_buf *ab = sc->buf;
|
||
|
|
|
||
|
|
return (unsigned long *)ab->buf;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* A bitmap of free space computed by walking attr leaf block free info. */
|
||
|
|
static inline unsigned long *
|
||
|
|
xchk_xattr_freemap(
|
||
|
|
struct xfs_scrub *sc)
|
||
|
|
{
|
||
|
|
return xchk_xattr_usedmap(sc) +
|
||
|
|
BITS_TO_LONGS(sc->mp->m_attr_geo->blksize);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* A bitmap used to hold temporary results. */
|
||
|
|
static inline unsigned long *
|
||
|
|
xchk_xattr_dstmap(
|
||
|
|
struct xfs_scrub *sc)
|
||
|
|
{
|
||
|
|
return xchk_xattr_freemap(sc) +
|
||
|
|
BITS_TO_LONGS(sc->mp->m_attr_geo->blksize);
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* __XFS_SCRUB_ATTR_H__ */
|