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e14293803f
Don't allow realtime volumes that are less than one rt extent long. This has been broken across 4 LTS kernels with nobody noticing, so let's just disable it. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de>
400 lines
10 KiB
C
400 lines
10 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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struct xfs_rtalloc_args {
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struct xfs_mount *mp;
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struct xfs_trans *tp;
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struct xfs_buf *rbmbp; /* bitmap block buffer */
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struct xfs_buf *sumbp; /* summary block buffer */
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xfs_fileoff_t rbmoff; /* bitmap block number */
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xfs_fileoff_t sumoff; /* summary block number */
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};
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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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if (mp->m_rtxblklog >= 0)
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return rtx << mp->m_rtxblklog;
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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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if (mp->m_rtxblklog >= 0)
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return rtxlen << mp->m_rtxblklog;
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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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if (mp->m_rtxblklog >= 0)
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return len & mp->m_rtxblkmask;
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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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if (mp->m_rtxblklog >= 0)
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return len >> mp->m_rtxblklog;
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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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if (likely(mp->m_rtxblklog >= 0))
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return rtbno >> mp->m_rtxblklog;
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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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if (likely(mp->m_rtxblklog >= 0))
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return rtbno & mp->m_rtxblkmask;
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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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if (likely(mp->m_rtxblklog >= 0)) {
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*off = rtbno & mp->m_rtxblkmask;
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return rtbno >> mp->m_rtxblklog;
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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 (likely(mp->m_rtxblklog >= 0)) {
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if (rtbno & mp->m_rtxblkmask)
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return (rtbno >> mp->m_rtxblklog) + 1;
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return rtbno >> mp->m_rtxblklog;
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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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/* Convert an rt extent number to a file block offset in the rt bitmap file. */
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static inline xfs_fileoff_t
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xfs_rtx_to_rbmblock(
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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_blkbit_log;
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}
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/* Convert an rt extent number to a word offset within an rt bitmap block. */
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static inline unsigned int
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xfs_rtx_to_rbmword(
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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 >> XFS_NBWORDLOG) & (mp->m_blockwsize - 1);
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}
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/* Convert a file block offset in the rt bitmap file to an rt extent number. */
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static inline xfs_rtxnum_t
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xfs_rbmblock_to_rtx(
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struct xfs_mount *mp,
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xfs_fileoff_t rbmoff)
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{
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return rbmoff << mp->m_blkbit_log;
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}
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/* Return a pointer to a bitmap word within a rt bitmap block. */
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static inline union xfs_rtword_raw *
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xfs_rbmblock_wordptr(
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struct xfs_rtalloc_args *args,
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unsigned int index)
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{
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union xfs_rtword_raw *words = args->rbmbp->b_addr;
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return words + index;
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}
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/* Convert an ondisk bitmap word to its incore representation. */
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static inline xfs_rtword_t
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xfs_rtbitmap_getword(
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struct xfs_rtalloc_args *args,
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unsigned int index)
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{
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union xfs_rtword_raw *word = xfs_rbmblock_wordptr(args, index);
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return word->old;
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}
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/* Set an ondisk bitmap word from an incore representation. */
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static inline void
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xfs_rtbitmap_setword(
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struct xfs_rtalloc_args *args,
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unsigned int index,
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xfs_rtword_t value)
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{
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union xfs_rtword_raw *word = xfs_rbmblock_wordptr(args, index);
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word->old = value;
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}
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/*
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* Convert a rt extent length and rt bitmap block number to a xfs_suminfo_t
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* offset within the rt summary file.
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*/
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static inline xfs_rtsumoff_t
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xfs_rtsumoffs(
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struct xfs_mount *mp,
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int log2_len,
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xfs_fileoff_t rbmoff)
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{
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return log2_len * mp->m_sb.sb_rbmblocks + rbmoff;
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}
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/*
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* Convert an xfs_suminfo_t offset to a file block offset within the rt summary
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* file.
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*/
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static inline xfs_fileoff_t
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xfs_rtsumoffs_to_block(
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struct xfs_mount *mp,
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xfs_rtsumoff_t rsumoff)
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{
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return XFS_B_TO_FSBT(mp, rsumoff * sizeof(xfs_suminfo_t));
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}
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/*
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* Convert an xfs_suminfo_t offset to an info word offset within an rt summary
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* block.
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*/
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static inline unsigned int
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xfs_rtsumoffs_to_infoword(
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struct xfs_mount *mp,
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xfs_rtsumoff_t rsumoff)
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{
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unsigned int mask = mp->m_blockmask >> XFS_SUMINFOLOG;
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return rsumoff & mask;
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}
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/* Return a pointer to a summary info word within a rt summary block. */
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static inline union xfs_suminfo_raw *
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xfs_rsumblock_infoptr(
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struct xfs_rtalloc_args *args,
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unsigned int index)
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{
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union xfs_suminfo_raw *info = args->sumbp->b_addr;
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return info + index;
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}
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/* Get the current value of a summary counter. */
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static inline xfs_suminfo_t
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xfs_suminfo_get(
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struct xfs_rtalloc_args *args,
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unsigned int index)
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{
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union xfs_suminfo_raw *info = xfs_rsumblock_infoptr(args, index);
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return info->old;
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}
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/* Add to the current value of a summary counter and return the new value. */
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static inline xfs_suminfo_t
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xfs_suminfo_add(
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struct xfs_rtalloc_args *args,
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unsigned int index,
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int delta)
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{
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union xfs_suminfo_raw *info = xfs_rsumblock_infoptr(args, index);
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info->old += delta;
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return info->old;
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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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void xfs_rtbuf_cache_relse(struct xfs_rtalloc_args *args);
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int xfs_rtbuf_get(struct xfs_rtalloc_args *args, xfs_fileoff_t block,
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int issum);
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static inline int
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xfs_rtbitmap_read_buf(
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struct xfs_rtalloc_args *args,
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xfs_fileoff_t block)
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{
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return xfs_rtbuf_get(args, block, 0);
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}
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static inline int
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xfs_rtsummary_read_buf(
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struct xfs_rtalloc_args *args,
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xfs_fileoff_t block)
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{
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return xfs_rtbuf_get(args, block, 1);
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}
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int xfs_rtcheck_range(struct xfs_rtalloc_args *args, xfs_rtxnum_t start,
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xfs_rtxlen_t len, int val, xfs_rtxnum_t *new, int *stat);
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int xfs_rtfind_back(struct xfs_rtalloc_args *args, xfs_rtxnum_t start,
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xfs_rtxnum_t limit, xfs_rtxnum_t *rtblock);
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int xfs_rtfind_forw(struct xfs_rtalloc_args *args, xfs_rtxnum_t start,
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xfs_rtxnum_t limit, xfs_rtxnum_t *rtblock);
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int xfs_rtmodify_range(struct xfs_rtalloc_args *args, xfs_rtxnum_t start,
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xfs_rtxlen_t len, int val);
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int xfs_rtmodify_summary_int(struct xfs_rtalloc_args *args, int log,
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xfs_fileoff_t bbno, int delta, xfs_suminfo_t *sum);
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int xfs_rtmodify_summary(struct xfs_rtalloc_args *args, int log,
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xfs_fileoff_t bbno, int delta);
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int xfs_rtfree_range(struct xfs_rtalloc_args *args, xfs_rtxnum_t start,
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xfs_rtxlen_t len);
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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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uint8_t xfs_compute_rextslog(xfs_rtbxlen_t rtextents);
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/* Do we support an rt volume having this number of rtextents? */
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static inline bool
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xfs_validate_rtextents(
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xfs_rtbxlen_t rtextents)
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{
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/* No runt rt volumes */
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if (rtextents == 0)
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return false;
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return true;
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}
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xfs_filblks_t xfs_rtbitmap_blockcount(struct xfs_mount *mp, xfs_rtbxlen_t
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rtextents);
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unsigned long long xfs_rtbitmap_wordcount(struct xfs_mount *mp,
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xfs_rtbxlen_t rtextents);
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xfs_filblks_t xfs_rtsummary_blockcount(struct xfs_mount *mp,
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unsigned int rsumlevels, xfs_extlen_t rbmblocks);
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unsigned long long xfs_rtsummary_wordcount(struct xfs_mount *mp,
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unsigned int rsumlevels, xfs_extlen_t rbmblocks);
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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_rtbitmap_read_buf(a,b) (-ENOSYS)
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# define xfs_rtsummary_read_buf(a,b) (-ENOSYS)
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# define xfs_rtbuf_cache_relse(a) (0)
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# define xfs_rtalloc_extent_is_free(m,t,s,l,i) (-ENOSYS)
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# define xfs_compute_rextslog(rtx) (0)
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# define xfs_validate_rtextents(rtx) (false)
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static inline xfs_filblks_t
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xfs_rtbitmap_blockcount(struct xfs_mount *mp, xfs_rtbxlen_t rtextents)
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{
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/* shut up gcc */
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return 0;
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}
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# define xfs_rtbitmap_wordcount(mp, r) (0)
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# define xfs_rtsummary_blockcount(mp, l, b) (0)
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# define xfs_rtsummary_wordcount(mp, l, b) (0)
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#endif /* CONFIG_XFS_RT */
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#endif /* __XFS_RTBITMAP_H__ */
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