btrfs: don't create or leak aliased root while cleaning up orphans
authorJeff Mahoney <jeffm@suse.com>
Thu, 18 Aug 2016 01:58:33 +0000 (21:58 -0400)
committerChris Mason <clm@fb.com>
Thu, 25 Aug 2016 10:58:29 +0000 (03:58 -0700)
commit35bbb97fc898aeb874cb7c8b746f091caa359994
tree4ff7e4a0ac701e26985efb0d24c0ea3665791ffc
parent187ee58c62c1d0d238d3dc4835869d33e1869906
btrfs: don't create or leak aliased root while cleaning up orphans

commit 909c3a22da3 (Btrfs: fix loading of orphan roots leading to BUG_ON)
avoids the BUG_ON but can add an aliased root to the dead_roots list or
leak the root.

Since we've already been loading roots into the radix tree, we should
use it before looking the root up on disk.

Cc: <stable@vger.kernel.org> # 4.5
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
fs/btrfs/disk-io.c
fs/btrfs/disk-io.h
fs/btrfs/root-tree.c