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Diffstat (limited to 'fs/xfs/xfs_rtalloc.h')
| -rw-r--r-- | fs/xfs/xfs_rtalloc.h | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/fs/xfs/xfs_rtalloc.h b/fs/xfs/xfs_rtalloc.h new file mode 100644 index 000000000..76c0a4a9b --- /dev/null +++ b/fs/xfs/xfs_rtalloc.h @@ -0,0 +1,145 @@ +/* + * 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; + +#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 */ + xfs_alloctype_t type, /* allocation type XFS_ALLOCTYPE... */ + 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_rtbuf_get(struct xfs_mount *mp, struct xfs_trans *tp, + xfs_rtblock_t block, int issum, struct xfs_buf **bpp); +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); + + +#else +# define xfs_rtallocate_extent(t,b,min,max,l,a,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) +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__ */ |