[Qemu-devel] [PULL 17/30] block: qed - use QEMU_PACKED for on-disk structures

[Kevin Wolf]

From: Jeff Cody <address@hidden>

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 <address@hidden>
Reviewed-by: Richard Henderson <address@hidden>
Signed-off-by: Kevin Wolf <address@hidden>
---
 block/qed.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/block/qed.h b/block/qed.h
index 2b4dded..5d65bea 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 */
-- 
1.8.1.4