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xfs: check inode reflink flag before calling reflink functions

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There are a couple of places where we don't check the inode's
reflink flag before calling into the reflink code.  Fix those,
and add some asserts so we don't make this mistake again.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reported-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:
Darrick J. Wong 2016-10-10 16:47:32 +11:00 • committed by Dave Chinner
parent 1f08af52e7
commit 63646fc58d
2 changed files with 9 additions and 7 deletions

4
fs/xfs/xfs_reflink.c
View file

@ -624,6 +624,7 @@ xfs_reflink_cancel_cow_range(
int error;
trace_xfs_reflink_cancel_cow_range(ip, offset, count);
ASSERT(xfs_is_reflink_inode(ip));
offset_fsb = XFS_B_TO_FSBT(ip->i_mount, offset);
if (count == NULLFILEOFF)
@ -1510,8 +1511,7 @@ xfs_reflink_clear_inode_flag(
int nmaps;
int error = 0;
if (!(ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK))
return 0;
ASSERT(xfs_is_reflink_inode(ip));
fbno = 0;
end = XFS_B_TO_FSB(mp, i_size_read(VFS_I(ip)));

12
fs/xfs/xfs_super.c
View file

@ -947,11 +947,13 @@ xfs_fs_destroy_inode(
XFS_STATS_INC(ip->i_mount, vn_rele);
XFS_STATS_INC(ip->i_mount, vn_remove);
error = xfs_reflink_cancel_cow_range(ip, 0, NULLFILEOFF);
if (error && !XFS_FORCED_SHUTDOWN(ip->i_mount))
xfs_warn(ip->i_mount, "Error %d while evicting CoW blocks "
"for inode %llu.",
error, ip->i_ino);
if (xfs_is_reflink_inode(ip)) {
error = xfs_reflink_cancel_cow_range(ip, 0, NULLFILEOFF);
if (error && !XFS_FORCED_SHUTDOWN(ip->i_mount))
xfs_warn(ip->i_mount,
"Error %d while evicting CoW blocks for inode %llu.",
error, ip->i_ino);
}
xfs_inactive(ip);