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fb3c3de2f6
Add _query_range and _query_all functions to the realtime bitmap allocator. These two functions are similar in usage to the btree functions with the same name and will be used for getfsmap and scrub. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com>
161 lines
5.3 KiB
C
161 lines
5.3 KiB
C
/*
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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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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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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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struct xfs_rtalloc_rec {
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xfs_rtblock_t ar_startblock;
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xfs_rtblock_t ar_blockcount;
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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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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_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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xfs_buf_t **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, xfs_buf_t **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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struct xfs_rtalloc_rec *low_rec,
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struct xfs_rtalloc_rec *high_rec,
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xfs_rtalloc_query_range_fn fn,
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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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#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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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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