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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__
struct xfs_rtalloc_args {
struct xfs_mount *mp;
struct xfs_trans *tp;
struct xfs_buf *rbmbp; /* bitmap block buffer */
struct xfs_buf *sumbp; /* summary block buffer */
xfs_fileoff_t rbmoff; /* bitmap block number */
xfs_fileoff_t sumoff; /* summary block number */
};
static inline xfs_rtblock_t
xfs_rtx_to_rtb(
struct xfs_mount *mp,
xfs_rtxnum_t rtx)
{
if (mp->m_rtxblklog >= 0)
return rtx << mp->m_rtxblklog;
return rtx * mp->m_sb.sb_rextsize;
}
static inline xfs_extlen_t
xfs_rtxlen_to_extlen(
struct xfs_mount *mp,
xfs_rtxlen_t rtxlen)
{
if (mp->m_rtxblklog >= 0)
return rtxlen << mp->m_rtxblklog;
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)
{
if (mp->m_rtxblklog >= 0)
return len & mp->m_rtxblkmask;
return len % mp->m_sb.sb_rextsize;
}
static inline xfs_rtxlen_t
xfs_extlen_to_rtxlen(
struct xfs_mount *mp,
xfs_extlen_t len)
{
if (mp->m_rtxblklog >= 0)
return len >> mp->m_rtxblklog;
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)
{
if (likely(mp->m_rtxblklog >= 0))
return rtbno >> mp->m_rtxblklog;
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)
{
if (likely(mp->m_rtxblklog >= 0))
return rtbno & mp->m_rtxblkmask;
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)
{
if (likely(mp->m_rtxblklog >= 0)) {
*off = rtbno & mp->m_rtxblkmask;
return rtbno >> mp->m_rtxblklog;
}
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 (likely(mp->m_rtxblklog >= 0)) {
if (rtbno & mp->m_rtxblkmask)
return (rtbno >> mp->m_rtxblklog) + 1;
return rtbno >> mp->m_rtxblklog;
}
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);
}
/* Convert an rt extent number to a file block offset in the rt bitmap file. */
static inline xfs_fileoff_t
xfs_rtx_to_rbmblock(
struct xfs_mount *mp,
xfs_rtxnum_t rtx)
{
return rtx >> mp->m_blkbit_log;
}
/* Convert an rt extent number to a word offset within an rt bitmap block. */
static inline unsigned int
xfs_rtx_to_rbmword(
struct xfs_mount *mp,
xfs_rtxnum_t rtx)
{
return (rtx >> XFS_NBWORDLOG) & (mp->m_blockwsize - 1);
}
/* Convert a file block offset in the rt bitmap file to an rt extent number. */
static inline xfs_rtxnum_t
xfs_rbmblock_to_rtx(
struct xfs_mount *mp,
xfs_fileoff_t rbmoff)
{
return rbmoff << mp->m_blkbit_log;
}
/* Return a pointer to a bitmap word within a rt bitmap block. */
static inline union xfs_rtword_raw *
xfs_rbmblock_wordptr(
struct xfs_rtalloc_args *args,
unsigned int index)
{
union xfs_rtword_raw *words = args->rbmbp->b_addr;
return words + index;
}
/* Convert an ondisk bitmap word to its incore representation. */
static inline xfs_rtword_t
xfs_rtbitmap_getword(
struct xfs_rtalloc_args *args,
unsigned int index)
{
union xfs_rtword_raw *word = xfs_rbmblock_wordptr(args, index);
return word->old;
}
/* Set an ondisk bitmap word from an incore representation. */
static inline void
xfs_rtbitmap_setword(
struct xfs_rtalloc_args *args,
unsigned int index,
xfs_rtword_t value)
{
union xfs_rtword_raw *word = xfs_rbmblock_wordptr(args, index);
word->old = value;
}
/*
* Convert a rt extent length and rt bitmap block number to a xfs_suminfo_t
* offset within the rt summary file.
*/
static inline xfs_rtsumoff_t
xfs_rtsumoffs(
struct xfs_mount *mp,
int log2_len,
xfs_fileoff_t rbmoff)
{
return log2_len * mp->m_sb.sb_rbmblocks + rbmoff;
}
/*
* Convert an xfs_suminfo_t offset to a file block offset within the rt summary
* file.
*/
static inline xfs_fileoff_t
xfs_rtsumoffs_to_block(
struct xfs_mount *mp,
xfs_rtsumoff_t rsumoff)
{
return XFS_B_TO_FSBT(mp, rsumoff * sizeof(xfs_suminfo_t));
}
/*
* Convert an xfs_suminfo_t offset to an info word offset within an rt summary
* block.
*/
static inline unsigned int
xfs_rtsumoffs_to_infoword(
struct xfs_mount *mp,
xfs_rtsumoff_t rsumoff)
{
unsigned int mask = mp->m_blockmask >> XFS_SUMINFOLOG;
return rsumoff & mask;
}
/* Return a pointer to a summary info word within a rt summary block. */
static inline union xfs_suminfo_raw *
xfs_rsumblock_infoptr(
struct xfs_rtalloc_args *args,
unsigned int index)
{
union xfs_suminfo_raw *info = args->sumbp->b_addr;
return info + index;
}
/* Get the current value of a summary counter. */
static inline xfs_suminfo_t
xfs_suminfo_get(
struct xfs_rtalloc_args *args,
unsigned int index)
{
union xfs_suminfo_raw *info = xfs_rsumblock_infoptr(args, index);
return info->old;
}
/* Add to the current value of a summary counter and return the new value. */
static inline xfs_suminfo_t
xfs_suminfo_add(
struct xfs_rtalloc_args *args,
unsigned int index,
int delta)
{
union xfs_suminfo_raw *info = xfs_rsumblock_infoptr(args, index);
info->old += delta;
return info->old;
}
/*
* 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
void xfs_rtbuf_cache_relse(struct xfs_rtalloc_args *args);
int xfs_rtbuf_get(struct xfs_rtalloc_args *args, xfs_fileoff_t block,
int issum);
static inline int
xfs_rtbitmap_read_buf(
struct xfs_rtalloc_args *args,
xfs_fileoff_t block)
{
return xfs_rtbuf_get(args, block, 0);
}
static inline int
xfs_rtsummary_read_buf(
struct xfs_rtalloc_args *args,
xfs_fileoff_t block)
{
return xfs_rtbuf_get(args, block, 1);
}
int xfs_rtcheck_range(struct xfs_rtalloc_args *args, xfs_rtxnum_t start,
xfs_rtxlen_t len, int val, xfs_rtxnum_t *new, int *stat);
int xfs_rtfind_back(struct xfs_rtalloc_args *args, xfs_rtxnum_t start,
xfs_rtxnum_t limit, xfs_rtxnum_t *rtblock);
int xfs_rtfind_forw(struct xfs_rtalloc_args *args, xfs_rtxnum_t start,
xfs_rtxnum_t limit, xfs_rtxnum_t *rtblock);
int xfs_rtmodify_range(struct xfs_rtalloc_args *args, xfs_rtxnum_t start,
xfs_rtxlen_t len, int val);
int xfs_rtget_summary(struct xfs_rtalloc_args *args, int log,
xfs_fileoff_t bbno, xfs_suminfo_t *sum);
int xfs_rtmodify_summary(struct xfs_rtalloc_args *args, int log,
xfs_fileoff_t bbno, int delta);
int xfs_rtfree_range(struct xfs_rtalloc_args *args, xfs_rtxnum_t start,
xfs_rtxlen_t len);
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);
uint8_t xfs_compute_rextslog(xfs_rtbxlen_t rtextents);
/* Do we support an rt volume having this number of rtextents? */
static inline bool
xfs_validate_rtextents(
xfs_rtbxlen_t rtextents)
{
/* No runt rt volumes */
if (rtextents == 0)
return false;
return true;
}
xfs_filblks_t xfs_rtbitmap_blockcount(struct xfs_mount *mp, xfs_rtbxlen_t
rtextents);
unsigned long long xfs_rtbitmap_wordcount(struct xfs_mount *mp,
xfs_rtbxlen_t rtextents);
xfs_filblks_t xfs_rtsummary_blockcount(struct xfs_mount *mp,
unsigned int rsumlevels, xfs_extlen_t rbmblocks);
unsigned long long xfs_rtsummary_wordcount(struct xfs_mount *mp,
unsigned int rsumlevels, xfs_extlen_t rbmblocks);
#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_rtbitmap_read_buf(a,b) (-ENOSYS)
# define xfs_rtsummary_read_buf(a,b) (-ENOSYS)
# define xfs_rtbuf_cache_relse(a) (0)
# define xfs_rtalloc_extent_is_free(m,t,s,l,i) (-ENOSYS)
# define xfs_compute_rextslog(rtx) (0)
# define xfs_validate_rtextents(rtx) (false)
static inline xfs_filblks_t
xfs_rtbitmap_blockcount(struct xfs_mount *mp, xfs_rtbxlen_t rtextents)
{
/* shut up gcc */
return 0;
}
# define xfs_rtbitmap_wordcount(mp, r) (0)
# define xfs_rtsummary_blockcount(mp, l, b) (0)
# define xfs_rtsummary_wordcount(mp, l, b) (0)
#endif /* CONFIG_XFS_RT */
#endif /* __XFS_RTBITMAP_H__ */
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