commit c4217f645dfdfd405cd0c50af953515e1114436a
author Jeff Cody <jcody@redhat.com> Wed Sep 25 12:08:50 2013 -0400
committer Kevin Wolf <kwolf@redhat.com> Wed Sep 25 20:51:13 2013 +0200
tree 10c54129685ed5c7347c5746a3674356f254dbbc
parent e54835c06d1f4896941c1505a86532aa1403ebe8

block: qcow2 - used QEMU_PACKED for on-disk structures

QCowHeader and QCowExtension are structs that reside in the on-disk
image format, and are read and written directly via bdrv_pread()/write(),
and as such should be packed to avoid any unintentional struct padding.

Signed-off-by: Jeff Cody <jcody@redhat.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

block/qcow2.h

diff --git a/block/qcow2.h b/block/qcow2.h
index c90e5d6..455e38d 100644
--- a/block/qcow2.h
+++ b/block/qcow2.h
@@ -86,7 +86,7 @@
 
     uint32_t refcount_order;
     uint32_t header_length;
-} QCowHeader;
+} QEMU_PACKED QCowHeader;
 
 typedef struct QCowSnapshot {
     uint64_t l1_table_offset;