From: Jeff Cody <jcody@redhat.com>
Date: Wed, 25 Sep 2013 16:08:51 +0000 (-0400)
Subject: block: qed - use QEMU_PACKED for on-disk structures
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=687fb89366366ce654a17c15af48adfe8c4ce70a;p=qemu.git

block: qed - use QEMU_PACKED for on-disk structures

QEDHeader is read, and written, directly from on-disk images
via bdrv_pread()/write().  To avoid any unintentional padding,
these structs should be packed.

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

diff --git a/block/qed.h b/block/qed.h
index 2b4ddedf31..5d65bea075 100644
--- a/block/qed.h
+++ b/block/qed.h
@@ -100,7 +100,7 @@ typedef struct {
     /* if (features & QED_F_BACKING_FILE) */
     uint32_t backing_filename_offset; /* in bytes from start of header */
     uint32_t backing_filename_size;   /* in bytes */
-} QEDHeader;
+} QEMU_PACKED QEDHeader;
 
 typedef struct {
     uint64_t offsets[0];            /* in bytes */