diff options
| author | Brian Foster <bfoster@redhat.com> | 2015-05-29 09:09:05 +1000 |
|---|---|---|
| committer | Dave Chinner <david@fromorbit.com> | 2015-05-29 09:09:05 +1000 |
| commit | 4148c347a42a2aba31f6f4d9a31c647c2d475697 (patch) | |
| tree | 2ad150be0e4aeba3d977d39c38b04e351e0bf082 /fs/xfs/libxfs/xfs_ialloc_btree.h | |
| parent | 7f43c907ad5afe100772249a79fa8cc9b751b28a (diff) | |
xfs: helper to convert holemask to inode alloc. bitmap
The inobt record holemask field is a condensed data type designed to fit
into the existing on-disk record and is zero based (allocated regions
are set to 0, sparse regions are set to 1) to provide backwards
compatibility. This makes the type somewhat complex for use in higher
level inode manipulations such as individual inode allocation, etc.
Rather than foist the complexity of dealing with this field to every bit
of logic that requires inode granular information, create a helper to
convert the holemask to an inode allocation bitmap. The inode allocation
bitmap is inode granularity similar to the inobt record free mask and
indicates which inodes of the chunk are physically allocated on disk,
irrespective of whether the inode is considered allocated or free by the
filesystem.
Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
Diffstat (limited to 'fs/xfs/libxfs/xfs_ialloc_btree.h')
| -rw-r--r-- | fs/xfs/libxfs/xfs_ialloc_btree.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/xfs/libxfs/xfs_ialloc_btree.h b/fs/xfs/libxfs/xfs_ialloc_btree.h index d7ebea72c2d0..2c581ba69cde 100644 --- a/fs/xfs/libxfs/xfs_ialloc_btree.h +++ b/fs/xfs/libxfs/xfs_ialloc_btree.h @@ -62,4 +62,7 @@ extern struct xfs_btree_cur *xfs_inobt_init_cursor(struct xfs_mount *, xfs_btnum_t); extern int xfs_inobt_maxrecs(struct xfs_mount *, int, int); +/* ir_holemask to inode allocation bitmap conversion */ +uint64_t xfs_inobt_irec_to_allocmask(struct xfs_inobt_rec_incore *); + #endif /* __XFS_IALLOC_BTREE_H__ */ |