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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
* All Rights Reserved.
*/
#ifndef __XFS_RTBITMAP_H__
#define __XFS_RTBITMAP_H__
static inline xfs_rtblock_t
xfs_rtx_to_rtb(
struct xfs_mount *mp,
xfs_rtxnum_t rtx)
{
return rtx * mp->m_sb.sb_rextsize;
}
static inline xfs_extlen_t
xfs_rtxlen_to_extlen(
struct xfs_mount *mp,
xfs_rtxlen_t rtxlen)
{
return rtxlen * mp->m_sb.sb_rextsize;
}
/* Compute the misalignment between an extent length and a realtime extent .*/
static inline unsigned int
xfs_extlen_to_rtxmod(
struct xfs_mount *mp,
xfs_extlen_t len)
{
return len % mp->m_sb.sb_rextsize;
}
static inline xfs_rtxlen_t
xfs_extlen_to_rtxlen(
struct xfs_mount *mp,
xfs_extlen_t len)
{
return len / mp->m_sb.sb_rextsize;
}
/* Convert an rt block number into an rt extent number. */
static inline xfs_rtxnum_t
xfs_rtb_to_rtx(
struct xfs_mount *mp,
xfs_rtblock_t rtbno)
{
return div_u64(rtbno, mp->m_sb.sb_rextsize);
}
/* Return the offset of an rt block number within an rt extent. */
static inline xfs_extlen_t
xfs_rtb_to_rtxoff(
struct xfs_mount *mp,
xfs_rtblock_t rtbno)
{
return do_div(rtbno, mp->m_sb.sb_rextsize);
}
/*
* Crack an rt block number into an rt extent number and an offset within that
* rt extent. Returns the rt extent number directly and the offset in @off.
*/
static inline xfs_rtxnum_t
xfs_rtb_to_rtxrem(
struct xfs_mount *mp,
xfs_rtblock_t rtbno,
xfs_extlen_t *off)
{
return div_u64_rem(rtbno, mp->m_sb.sb_rextsize, off);
}
/*
* Convert an rt block number into an rt extent number, rounding up to the next
* rt extent if the rt block is not aligned to an rt extent boundary.
*/
static inline xfs_rtxnum_t
xfs_rtb_to_rtxup(
struct xfs_mount *mp,
xfs_rtblock_t rtbno)
{
if (do_div(rtbno, mp->m_sb.sb_rextsize))
rtbno++;
return rtbno;
}
/* Round this rtblock up to the nearest rt extent size. */
static inline xfs_rtblock_t
xfs_rtb_roundup_rtx(
struct xfs_mount *mp,
xfs_rtblock_t rtbno)
{
return roundup_64(rtbno, mp->m_sb.sb_rextsize);
}
/* Round this rtblock down to the nearest rt extent size. */
static inline xfs_rtblock_t
xfs_rtb_rounddown_rtx(
struct xfs_mount *mp,
xfs_rtblock_t rtbno)
{
return rounddown_64(rtbno, mp->m_sb.sb_rextsize);
}
/*
* Functions for walking free space rtextents in the realtime bitmap.
*/
struct xfs_rtalloc_rec {
xfs_rtxnum_t ar_startext;
xfs_rtbxlen_t ar_extcount;
};
typedef int (*xfs_rtalloc_query_range_fn)(
struct xfs_mount *mp,
struct xfs_trans *tp,
const struct xfs_rtalloc_rec *rec,
void *priv);
#ifdef CONFIG_XFS_RT
int xfs_rtbuf_get(struct xfs_mount *mp, struct xfs_trans *tp,
xfs_fileoff_t block, int issum, struct xfs_buf **bpp);
int xfs_rtcheck_range(struct xfs_mount *mp, struct xfs_trans *tp,
xfs_rtxnum_t start, xfs_rtxlen_t len, int val,
xfs_rtxnum_t *new, int *stat);
int xfs_rtfind_back(struct xfs_mount *mp, struct xfs_trans *tp,
xfs_rtxnum_t start, xfs_rtxnum_t limit,
xfs_rtxnum_t *rtblock);
int xfs_rtfind_forw(struct xfs_mount *mp, struct xfs_trans *tp,
xfs_rtxnum_t start, xfs_rtxnum_t limit,
xfs_rtxnum_t *rtblock);
int xfs_rtmodify_range(struct xfs_mount *mp, struct xfs_trans *tp,
xfs_rtxnum_t start, xfs_rtxlen_t len, int val);
int xfs_rtmodify_summary_int(struct xfs_mount *mp, struct xfs_trans *tp,
int log, xfs_fileoff_t bbno, int delta,
struct xfs_buf **rbpp, xfs_fileoff_t *rsb,
xfs_suminfo_t *sum);
int xfs_rtmodify_summary(struct xfs_mount *mp, struct xfs_trans *tp, int log,
xfs_fileoff_t bbno, int delta, struct xfs_buf **rbpp,
xfs_fileoff_t *rsb);
int xfs_rtfree_range(struct xfs_mount *mp, struct xfs_trans *tp,
xfs_rtxnum_t start, xfs_rtxlen_t len,
struct xfs_buf **rbpp, xfs_fileoff_t *rsb);
int xfs_rtalloc_query_range(struct xfs_mount *mp, struct xfs_trans *tp,
const struct xfs_rtalloc_rec *low_rec,
const struct xfs_rtalloc_rec *high_rec,
xfs_rtalloc_query_range_fn fn, void *priv);
int xfs_rtalloc_query_all(struct xfs_mount *mp, struct xfs_trans *tp,
xfs_rtalloc_query_range_fn fn,
void *priv);
int xfs_rtalloc_extent_is_free(struct xfs_mount *mp, struct xfs_trans *tp,
xfs_rtxnum_t start, xfs_rtxlen_t len,
bool *is_free);
/*
* Free an extent in the realtime subvolume. Length is expressed in
* realtime extents, as is the block number.
*/
int /* error */
xfs_rtfree_extent(
struct xfs_trans *tp, /* transaction pointer */
xfs_rtxnum_t start, /* starting rtext number to free */
xfs_rtxlen_t len); /* length of extent freed */
/* Same as above, but in units of rt blocks. */
int xfs_rtfree_blocks(struct xfs_trans *tp, xfs_fsblock_t rtbno,
xfs_filblks_t rtlen);
#else /* CONFIG_XFS_RT */
# define xfs_rtfree_extent(t,b,l) (-ENOSYS)
# define xfs_rtfree_blocks(t,rb,rl) (-ENOSYS)
# define xfs_rtalloc_query_range(m,t,l,h,f,p) (-ENOSYS)
# define xfs_rtalloc_query_all(m,t,f,p) (-ENOSYS)
# define xfs_rtbuf_get(m,t,b,i,p) (-ENOSYS)
# define xfs_rtalloc_extent_is_free(m,t,s,l,i) (-ENOSYS)
#endif /* CONFIG_XFS_RT */
#endif /* __XFS_RTBITMAP_H__ */
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