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The query_range functions are supposed to call a caller-supplied function on each record found in the dataset. These functions don't own the memory storing the record, so don't let them change the record. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de>
161 lines
5.4 KiB
C
161 lines
5.4 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_RTALLOC_H__
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#define __XFS_RTALLOC_H__
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/* kernel only definitions and functions */
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struct xfs_mount;
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struct xfs_trans;
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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_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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/*
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* Function prototypes for exported functions.
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*/
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/*
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* Allocate an extent in the realtime subvolume, with the usual allocation
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* parameters. The length units are all in realtime extents, as is the
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* result block number.
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*/
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int /* error */
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xfs_rtallocate_extent(
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struct xfs_trans *tp, /* transaction pointer */
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xfs_rtblock_t bno, /* starting block number to allocate */
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xfs_extlen_t minlen, /* minimum length to allocate */
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xfs_extlen_t maxlen, /* maximum length to allocate */
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xfs_extlen_t *len, /* out: actual length allocated */
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int wasdel, /* was a delayed allocation extent */
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xfs_extlen_t prod, /* extent product factor */
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xfs_rtblock_t *rtblock); /* out: start block allocated */
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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_extlen_t len); /* length of extent freed */
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/*
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* Initialize realtime fields in the mount structure.
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*/
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int /* error */
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xfs_rtmount_init(
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struct xfs_mount *mp); /* file system mount structure */
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void
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xfs_rtunmount_inodes(
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struct xfs_mount *mp);
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/*
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* Get the bitmap and summary inodes into the mount structure
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* at mount time.
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*/
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int /* error */
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xfs_rtmount_inodes(
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struct xfs_mount *mp); /* file system mount structure */
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/*
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* Pick an extent for allocation at the start of a new realtime file.
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* Use the sequence number stored in the atime field of the bitmap inode.
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* Translate this to a fraction of the rtextents, and return the product
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* of rtextents and the fraction.
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* The fraction sequence is 0, 1/2, 1/4, 3/4, 1/8, ..., 7/8, 1/16, ...
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*/
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int /* error */
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xfs_rtpick_extent(
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struct xfs_mount *mp, /* file system mount point */
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struct xfs_trans *tp, /* transaction pointer */
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xfs_extlen_t len, /* allocation length (rtextents) */
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xfs_rtblock_t *pick); /* result rt extent */
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/*
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* Grow the realtime area of the filesystem.
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*/
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int
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xfs_growfs_rt(
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struct xfs_mount *mp, /* file system mount structure */
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xfs_growfs_rt_t *in); /* user supplied growfs struct */
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/*
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* From xfs_rtbitmap.c
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*/
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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_extlen_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_extlen_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_extlen_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_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_trans *tp,
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xfs_rtalloc_query_range_fn fn,
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void *priv);
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bool xfs_verify_rtbno(struct xfs_mount *mp, xfs_rtblock_t rtbno);
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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_extlen_t len,
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bool *is_free);
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#else
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# define xfs_rtallocate_extent(t,b,min,max,l,f,p,rb) (ENOSYS)
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# define xfs_rtfree_extent(t,b,l) (ENOSYS)
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# define xfs_rtpick_extent(m,t,l,rb) (ENOSYS)
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# define xfs_growfs_rt(mp,in) (ENOSYS)
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# define xfs_rtalloc_query_range(t,l,h,f,p) (ENOSYS)
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# define xfs_rtalloc_query_all(t,f,p) (ENOSYS)
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# define xfs_rtbuf_get(m,t,b,i,p) (ENOSYS)
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# define xfs_verify_rtbno(m, r) (false)
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# define xfs_rtalloc_extent_is_free(m,t,s,l,i) (ENOSYS)
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static inline int /* error */
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xfs_rtmount_init(
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xfs_mount_t *mp) /* file system mount structure */
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{
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if (mp->m_sb.sb_rblocks == 0)
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return 0;
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xfs_warn(mp, "Not built with CONFIG_XFS_RT");
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return -ENOSYS;
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}
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# define xfs_rtmount_inodes(m) (((mp)->m_sb.sb_rblocks == 0)? 0 : (ENOSYS))
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# define xfs_rtunmount_inodes(m)
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#endif /* CONFIG_XFS_RT */
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#endif /* __XFS_RTALLOC_H__ */
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