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For a given rt group, regenerate the bitmap contents from the group's realtime rmap btree. Signed-off-by: "Darrick J. Wong" <djwong@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de>
78 lines
2.1 KiB
C
78 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2023 Oracle. All Rights Reserved.
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* Author: Darrick J. Wong <djwong@kernel.org>
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*/
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#ifndef __XFS_SCRUB_RTBITMAP_H__
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#define __XFS_SCRUB_RTBITMAP_H__
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/*
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* We use an xfile to construct new bitmap blocks for the portion of the
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* rtbitmap file that we're replacing. Whereas the ondisk bitmap must be
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* accessed through the buffer cache, the xfile bitmap supports direct
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* word-level accesses. Therefore, we create a small abstraction for linear
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* access.
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*/
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typedef unsigned long long xrep_wordoff_t;
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typedef unsigned int xrep_wordcnt_t;
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/* Mask to round an rtx down to the nearest bitmap word. */
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#define XREP_RTBMP_WORDMASK ((1ULL << XFS_NBWORDLOG) - 1)
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struct xchk_rtbitmap {
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struct xfs_scrub *sc;
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uint64_t rextents;
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uint64_t rbmblocks;
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unsigned int rextslog;
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unsigned int resblks;
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/* The next free rt group block number that we expect to see. */
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xfs_rgblock_t next_free_rgbno;
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#ifdef CONFIG_XFS_ONLINE_REPAIR
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/* stuff for staging a new bitmap */
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struct xfs_rtalloc_args args;
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struct xrep_tempexch tempexch;
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#endif
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/* The next rtgroup block we expect to see during our rtrmapbt walk. */
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xfs_rgblock_t next_rgbno;
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/* rtgroup lock flags */
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unsigned int rtglock_flags;
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/* rtword position of xfile as we write buffers to disk. */
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xrep_wordoff_t prep_wordoff;
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/* In-Memory rtbitmap for repair. */
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union xfs_rtword_raw words[];
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};
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#ifdef CONFIG_XFS_ONLINE_REPAIR
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int xrep_setup_rtbitmap(struct xfs_scrub *sc, struct xchk_rtbitmap *rtb);
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/*
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* How big should the words[] buffer be?
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*
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* For repairs, we want a full fsblock worth of space so that we can memcpy a
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* buffer full of 1s into the xfile bitmap. The xfile bitmap doesn't have
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* rtbitmap block headers, so we don't use blockwsize. Scrub doesn't use the
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* words buffer at all.
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*/
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static inline unsigned int
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xchk_rtbitmap_wordcnt(
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struct xfs_scrub *sc)
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{
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if (xchk_could_repair(sc))
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return sc->mp->m_sb.sb_blocksize >> XFS_WORDLOG;
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return 0;
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}
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#else
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# define xrep_setup_rtbitmap(sc, rtb) (0)
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# define xchk_rtbitmap_wordcnt(sc) (0)
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#endif /* CONFIG_XFS_ONLINE_REPAIR */
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#endif /* __XFS_SCRUB_RTBITMAP_H__ */
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