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xfs: ensure that fpunch, fcollapse, and finsert operations are aligned to rt extent size 

Make sure that any fallocate operation that requires the range to be
block-aligned also checks that the range is aligned to the realtime
extent size.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Darrick J. Wong 2020-09-09 14:21:06 -07:00
parent 2a6ca4baed
commit fe341eb151
1 changed files with 16 additions and 0 deletions
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16
fs/xfs/xfs_bmap_util.c
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@ -946,6 +946,14 @@ xfs_free_file_space(
startoffset_fsb = XFS_B_TO_FSB(mp, offset); startoffset_fsb = XFS_B_TO_FSB(mp, offset);
endoffset_fsb = XFS_B_TO_FSBT(mp, offset + len); endoffset_fsb = XFS_B_TO_FSBT(mp, offset + len);
/* We can only free complete realtime extents. */
if (XFS_IS_REALTIME_INODE(ip)) {
xfs_extlen_t extsz = xfs_get_extsz_hint(ip);
if ((startoffset_fsb | endoffset_fsb) & (extsz - 1))
return -EINVAL;
}
/* /*
* Need to zero the stuff we're not freeing, on disk. * Need to zero the stuff we're not freeing, on disk.
*/ */
@ -1139,6 +1147,14 @@ xfs_insert_file_space(
trace_xfs_insert_file_space(ip); trace_xfs_insert_file_space(ip);
/* We can only insert complete realtime extents. */
if (XFS_IS_REALTIME_INODE(ip)) {
xfs_extlen_t extsz = xfs_get_extsz_hint(ip);
if ((stop_fsb | shift_fsb) & (extsz - 1))
return -EINVAL;
}
error = xfs_bmap_can_insert_extents(ip, stop_fsb, shift_fsb); error = xfs_bmap_can_insert_extents(ip, stop_fsb, shift_fsb);
if (error) if (error)
return error; return error;