evie/android_kernel_oneplus_msm8998
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

xfs: filter out sparse regions from individual inode allocation

Browse source 
Inode allocation from an existing record with free inodes traditionally
selects the first inode available according to the ir_free mask. With
sparse inode chunks, the ir_free mask could refer to an unallocated
region. We must mask the unallocated regions out of ir_free before using
it to select a free inode in the chunk.

Update the xfs_inobt_first_free_inode() helper to find the first free
inode available of the allocated regions of the inode chunk.

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 09:20:10 +10:00 • committed by Dave Chinner
parent 1cdadee11f
commit 26dd5217de
1 changed files with 13 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

13
fs/xfs/libxfs/xfs_ialloc.c
View file

@ -1076,13 +1076,24 @@ xfs_ialloc_get_rec(
} }
/* /*
* Return the offset of the first free inode in the record. * Return the offset of the first free inode in the record. If the inode chunk
* is sparsely allocated, we convert the record holemask to inode granularity
* and mask off the unallocated regions from the inode free mask.
*/ */
STATIC int STATIC int
xfs_inobt_first_free_inode( xfs_inobt_first_free_inode(
struct xfs_inobt_rec_incore *rec) struct xfs_inobt_rec_incore *rec)
{ {
xfs_inofree_t realfree;
/* if there are no holes, return the first available offset */
if (!xfs_inobt_issparse(rec->ir_holemask))
return xfs_lowbit64(rec->ir_free); return xfs_lowbit64(rec->ir_free);
realfree = xfs_inobt_irec_to_allocmask(rec);
realfree &= rec->ir_free;
return xfs_lowbit64(realfree);
} }
/* /*