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xfs_rtalloc.h
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xfs_rtalloc.h
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/*
* Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
* All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef __XFS_RTALLOC_H__
#define __XFS_RTALLOC_H__
/* kernel only definitions and functions */
struct xfs_mount;
struct xfs_trans;
struct xfs_rtalloc_rec {
xfs_rtblock_t ar_startblock;
xfs_rtblock_t ar_blockcount;
};
typedef int (*xfs_rtalloc_query_range_fn)(
struct xfs_trans *tp,
struct xfs_rtalloc_rec *rec,
void *priv);
#ifdef CONFIG_XFS_RT
/*
* Function prototypes for exported functions.
*/
/*
* Allocate an extent in the realtime subvolume, with the usual allocation
* parameters. The length units are all in realtime extents, as is the
* result block number.
*/
int /* error */
xfs_rtallocate_extent(
struct xfs_trans *tp, /* transaction pointer */
xfs_rtblock_t bno, /* starting block number to allocate */
xfs_extlen_t minlen, /* minimum length to allocate */
xfs_extlen_t maxlen, /* maximum length to allocate */
xfs_extlen_t *len, /* out: actual length allocated */
int wasdel, /* was a delayed allocation extent */
xfs_extlen_t prod, /* extent product factor */
xfs_rtblock_t *rtblock); /* out: start block allocated */
/*
* Free an extent in the realtime subvolume. Length is expressed in
* realtime extents, as is the block number.
*/
int /* error */
xfs_rtfree_extent(
struct xfs_trans *tp, /* transaction pointer */
xfs_rtblock_t bno, /* starting block number to free */
xfs_extlen_t len); /* length of extent freed */
/*
* Initialize realtime fields in the mount structure.
*/
int /* error */
xfs_rtmount_init(
struct xfs_mount *mp); /* file system mount structure */
void
xfs_rtunmount_inodes(
struct xfs_mount *mp);
/*
* Get the bitmap and summary inodes into the mount structure
* at mount time.
*/
int /* error */
xfs_rtmount_inodes(
struct xfs_mount *mp); /* file system mount structure */
/*
* Pick an extent for allocation at the start of a new realtime file.
* Use the sequence number stored in the atime field of the bitmap inode.
* Translate this to a fraction of the rtextents, and return the product
* of rtextents and the fraction.
* The fraction sequence is 0, 1/2, 1/4, 3/4, 1/8, ..., 7/8, 1/16, ...
*/
int /* error */
xfs_rtpick_extent(
struct xfs_mount *mp, /* file system mount point */
struct xfs_trans *tp, /* transaction pointer */
xfs_extlen_t len, /* allocation length (rtextents) */
xfs_rtblock_t *pick); /* result rt extent */
/*
* Grow the realtime area of the filesystem.
*/
int
xfs_growfs_rt(
struct xfs_mount *mp, /* file system mount structure */
xfs_growfs_rt_t *in); /* user supplied growfs struct */
/*
* From xfs_rtbitmap.c
*/
int xfs_rtcheck_range(struct xfs_mount *mp, struct xfs_trans *tp,
xfs_rtblock_t start, xfs_extlen_t len, int val,
xfs_rtblock_t *new, int *stat);
int xfs_rtfind_back(struct xfs_mount *mp, struct xfs_trans *tp,
xfs_rtblock_t start, xfs_rtblock_t limit,
xfs_rtblock_t *rtblock);
int xfs_rtfind_forw(struct xfs_mount *mp, struct xfs_trans *tp,
xfs_rtblock_t start, xfs_rtblock_t limit,
xfs_rtblock_t *rtblock);
int xfs_rtmodify_range(struct xfs_mount *mp, struct xfs_trans *tp,
xfs_rtblock_t start, xfs_extlen_t len, int val);
int xfs_rtmodify_summary_int(struct xfs_mount *mp, struct xfs_trans *tp,
int log, xfs_rtblock_t bbno, int delta,
xfs_buf_t **rbpp, xfs_fsblock_t *rsb,
xfs_suminfo_t *sum);
int xfs_rtmodify_summary(struct xfs_mount *mp, struct xfs_trans *tp, int log,
xfs_rtblock_t bbno, int delta, xfs_buf_t **rbpp,
xfs_fsblock_t *rsb);
int xfs_rtfree_range(struct xfs_mount *mp, struct xfs_trans *tp,
xfs_rtblock_t start, xfs_extlen_t len,
struct xfs_buf **rbpp, xfs_fsblock_t *rsb);
int xfs_rtalloc_query_range(struct xfs_trans *tp,
struct xfs_rtalloc_rec *low_rec,
struct xfs_rtalloc_rec *high_rec,
xfs_rtalloc_query_range_fn fn,
void *priv);
int xfs_rtalloc_query_all(struct xfs_trans *tp,
xfs_rtalloc_query_range_fn fn,
void *priv);
#else
# define xfs_rtallocate_extent(t,b,min,max,l,f,p,rb) (ENOSYS)
# define xfs_rtfree_extent(t,b,l) (ENOSYS)
# define xfs_rtpick_extent(m,t,l,rb) (ENOSYS)
# define xfs_growfs_rt(mp,in) (ENOSYS)
# define xfs_rtalloc_query_range(t,l,h,f,p) (ENOSYS)
# define xfs_rtalloc_query_all(t,f,p) (ENOSYS)
static inline int /* error */
xfs_rtmount_init(
xfs_mount_t *mp) /* file system mount structure */
{
if (mp->m_sb.sb_rblocks == 0)
return 0;
xfs_warn(mp, "Not built with CONFIG_XFS_RT");
return -ENOSYS;
}
# define xfs_rtmount_inodes(m) (((mp)->m_sb.sb_rblocks == 0)? 0 : (ENOSYS))
# define xfs_rtunmount_inodes(m)
#endif /* CONFIG_XFS_RT */
#endif /* __XFS_RTALLOC_H__ */