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5f57f7309d
Create a pair of functions to round rtblock numbers up or down to the nearest rt extent. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de>
175 lines
5 KiB
C
175 lines
5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*/
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#ifndef __XFS_RTBITMAP_H__
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#define __XFS_RTBITMAP_H__
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static inline xfs_rtblock_t
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xfs_rtx_to_rtb(
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struct xfs_mount *mp,
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xfs_rtxnum_t rtx)
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{
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return rtx * mp->m_sb.sb_rextsize;
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}
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static inline xfs_extlen_t
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xfs_rtxlen_to_extlen(
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struct xfs_mount *mp,
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xfs_rtxlen_t rtxlen)
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{
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return rtxlen * mp->m_sb.sb_rextsize;
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}
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/* Compute the misalignment between an extent length and a realtime extent .*/
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static inline unsigned int
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xfs_extlen_to_rtxmod(
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struct xfs_mount *mp,
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xfs_extlen_t len)
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{
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return len % mp->m_sb.sb_rextsize;
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}
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static inline xfs_rtxlen_t
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xfs_extlen_to_rtxlen(
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struct xfs_mount *mp,
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xfs_extlen_t len)
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{
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return len / mp->m_sb.sb_rextsize;
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}
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/* Convert an rt block number into an rt extent number. */
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static inline xfs_rtxnum_t
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xfs_rtb_to_rtx(
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struct xfs_mount *mp,
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xfs_rtblock_t rtbno)
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{
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return div_u64(rtbno, mp->m_sb.sb_rextsize);
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}
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/* Return the offset of an rt block number within an rt extent. */
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static inline xfs_extlen_t
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xfs_rtb_to_rtxoff(
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struct xfs_mount *mp,
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xfs_rtblock_t rtbno)
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{
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return do_div(rtbno, mp->m_sb.sb_rextsize);
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}
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/*
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* Crack an rt block number into an rt extent number and an offset within that
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* rt extent. Returns the rt extent number directly and the offset in @off.
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*/
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static inline xfs_rtxnum_t
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xfs_rtb_to_rtxrem(
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struct xfs_mount *mp,
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xfs_rtblock_t rtbno,
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xfs_extlen_t *off)
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{
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return div_u64_rem(rtbno, mp->m_sb.sb_rextsize, off);
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}
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/*
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* Convert an rt block number into an rt extent number, rounding up to the next
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* rt extent if the rt block is not aligned to an rt extent boundary.
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*/
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static inline xfs_rtxnum_t
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xfs_rtb_to_rtxup(
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struct xfs_mount *mp,
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xfs_rtblock_t rtbno)
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{
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if (do_div(rtbno, mp->m_sb.sb_rextsize))
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rtbno++;
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return rtbno;
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}
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/* Round this rtblock up to the nearest rt extent size. */
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static inline xfs_rtblock_t
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xfs_rtb_roundup_rtx(
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struct xfs_mount *mp,
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xfs_rtblock_t rtbno)
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{
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return roundup_64(rtbno, mp->m_sb.sb_rextsize);
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}
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/* Round this rtblock down to the nearest rt extent size. */
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static inline xfs_rtblock_t
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xfs_rtb_rounddown_rtx(
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struct xfs_mount *mp,
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xfs_rtblock_t rtbno)
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{
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return rounddown_64(rtbno, mp->m_sb.sb_rextsize);
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}
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/*
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* Functions for walking free space rtextents in the realtime bitmap.
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*/
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struct xfs_rtalloc_rec {
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xfs_rtxnum_t ar_startext;
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xfs_rtbxlen_t ar_extcount;
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};
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typedef int (*xfs_rtalloc_query_range_fn)(
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struct xfs_mount *mp,
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struct xfs_trans *tp,
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const struct xfs_rtalloc_rec *rec,
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void *priv);
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#ifdef CONFIG_XFS_RT
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int xfs_rtbuf_get(struct xfs_mount *mp, struct xfs_trans *tp,
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xfs_fileoff_t block, int issum, struct xfs_buf **bpp);
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int xfs_rtcheck_range(struct xfs_mount *mp, struct xfs_trans *tp,
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xfs_rtxnum_t start, xfs_rtxlen_t len, int val,
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xfs_rtxnum_t *new, int *stat);
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int xfs_rtfind_back(struct xfs_mount *mp, struct xfs_trans *tp,
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xfs_rtxnum_t start, xfs_rtxnum_t limit,
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xfs_rtxnum_t *rtblock);
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int xfs_rtfind_forw(struct xfs_mount *mp, struct xfs_trans *tp,
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xfs_rtxnum_t start, xfs_rtxnum_t limit,
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xfs_rtxnum_t *rtblock);
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int xfs_rtmodify_range(struct xfs_mount *mp, struct xfs_trans *tp,
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xfs_rtxnum_t start, xfs_rtxlen_t len, int val);
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int xfs_rtmodify_summary_int(struct xfs_mount *mp, struct xfs_trans *tp,
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int log, xfs_fileoff_t bbno, int delta,
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struct xfs_buf **rbpp, xfs_fileoff_t *rsb,
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xfs_suminfo_t *sum);
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int xfs_rtmodify_summary(struct xfs_mount *mp, struct xfs_trans *tp, int log,
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xfs_fileoff_t bbno, int delta, struct xfs_buf **rbpp,
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xfs_fileoff_t *rsb);
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int xfs_rtfree_range(struct xfs_mount *mp, struct xfs_trans *tp,
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xfs_rtxnum_t start, xfs_rtxlen_t len,
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struct xfs_buf **rbpp, xfs_fileoff_t *rsb);
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int xfs_rtalloc_query_range(struct xfs_mount *mp, struct xfs_trans *tp,
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const struct xfs_rtalloc_rec *low_rec,
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const struct xfs_rtalloc_rec *high_rec,
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xfs_rtalloc_query_range_fn fn, void *priv);
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int xfs_rtalloc_query_all(struct xfs_mount *mp, struct xfs_trans *tp,
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xfs_rtalloc_query_range_fn fn,
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void *priv);
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int xfs_rtalloc_extent_is_free(struct xfs_mount *mp, struct xfs_trans *tp,
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xfs_rtxnum_t start, xfs_rtxlen_t len,
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bool *is_free);
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/*
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* Free an extent in the realtime subvolume. Length is expressed in
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* realtime extents, as is the block number.
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*/
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int /* error */
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xfs_rtfree_extent(
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struct xfs_trans *tp, /* transaction pointer */
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xfs_rtxnum_t start, /* starting rtext number to free */
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xfs_rtxlen_t len); /* length of extent freed */
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/* Same as above, but in units of rt blocks. */
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int xfs_rtfree_blocks(struct xfs_trans *tp, xfs_fsblock_t rtbno,
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xfs_filblks_t rtlen);
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#else /* CONFIG_XFS_RT */
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# define xfs_rtfree_extent(t,b,l) (-ENOSYS)
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# define xfs_rtfree_blocks(t,rb,rl) (-ENOSYS)
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# define xfs_rtalloc_query_range(m,t,l,h,f,p) (-ENOSYS)
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# define xfs_rtalloc_query_all(m,t,f,p) (-ENOSYS)
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# define xfs_rtbuf_get(m,t,b,i,p) (-ENOSYS)
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# define xfs_rtalloc_extent_is_free(m,t,s,l,i) (-ENOSYS)
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#endif /* CONFIG_XFS_RT */
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#endif /* __XFS_RTBITMAP_H__ */
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