a684c538bc
In most of the filesystem, we use xfs_extlen_t to store the length of a file (or AG) space mapping in units of fs blocks. Unfortunately, the realtime allocator also uses it to store the length of a rt space mapping in units of rt extents. This is confusing, since one rt extent can consist of many fs blocks. Separate the two by introducing a new type (xfs_rtxlen_t) to store the length of a space mapping (in units of realtime extents) that would be found in a file. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de>
82 lines
3.1 KiB
C
82 lines
3.1 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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/*
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* XXX: Most of the realtime allocation functions deal in units of realtime
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* extents, not realtime blocks. This looks funny when paired with the type
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* name and screams for a larger cleanup.
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*/
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struct xfs_rtalloc_rec {
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xfs_rtblock_t ar_startext;
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xfs_rtblock_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_rtblock_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_rtblock_t start, xfs_rtxlen_t len, int val,
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xfs_rtblock_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_rtblock_t start, xfs_rtblock_t limit,
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xfs_rtblock_t *rtblock);
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int xfs_rtfind_forw(struct xfs_mount *mp, struct xfs_trans *tp,
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xfs_rtblock_t start, xfs_rtblock_t limit,
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xfs_rtblock_t *rtblock);
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int xfs_rtmodify_range(struct xfs_mount *mp, struct xfs_trans *tp,
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xfs_rtblock_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_rtblock_t bbno, int delta,
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struct xfs_buf **rbpp, xfs_fsblock_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_rtblock_t bbno, int delta, struct xfs_buf **rbpp,
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xfs_fsblock_t *rsb);
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int xfs_rtfree_range(struct xfs_mount *mp, struct xfs_trans *tp,
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xfs_rtblock_t start, xfs_rtxlen_t len,
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struct xfs_buf **rbpp, xfs_fsblock_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_rtblock_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_rtblock_t bno, /* starting block 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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