Orange Pi5 kernel

/* 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[0];
};
 
/* 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);
}
 
int xchk_setup_xattr_buf(struct xfs_scrub *sc, size_t value_size,
<------><------>xfs_km_flags_t flags);
 
#endif	/* __XFS_SCRUB_ATTR_H__ */