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xfs: create individual inode alloc. helper

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Inode allocation from sparse inode records must filter the ir_free mask
against ir_holemask.  In preparation for this requirement, create a
helper to allocate an individual inode from an inode record.

Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Brian Foster 2015-05-29 08:50:21 +10:00 committed by Dave Chinner
parent 5ebe6afaf0
commit d4cc540b08
1 changed files with 12 additions and 2 deletions
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14
fs/xfs/libxfs/xfs_ialloc.c
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@ -731,6 +731,16 @@ xfs_ialloc_get_rec(
return 0;
}
/*
* Return the offset of the first free inode in the record.
*/
STATIC int
xfs_inobt_first_free_inode(
struct xfs_inobt_rec_incore *rec)
{
return xfs_lowbit64(rec->ir_free);
}
/*
* Allocate an inode using the inobt-only algorithm.
*/
@ -961,7 +971,7 @@ newino:
}
alloc_inode:
offset = xfs_lowbit64(rec.ir_free);
offset = xfs_inobt_first_free_inode(&rec);
ASSERT(offset >= 0);
ASSERT(offset < XFS_INODES_PER_CHUNK);
ASSERT((XFS_AGINO_TO_OFFSET(mp, rec.ir_startino) %
@ -1210,7 +1220,7 @@ xfs_dialloc_ag(
if (error)
goto error_cur;
offset = xfs_lowbit64(rec.ir_free);
offset = xfs_inobt_first_free_inode(&rec);
ASSERT(offset >= 0);
ASSERT(offset < XFS_INODES_PER_CHUNK);
ASSERT((XFS_AGINO_TO_OFFSET(mp, rec.ir_startino) %