block/parallels: Do not update header or truncate image when INMIGRATE

If we write or modify the image file while the QEMU run state is
INMIGRATE, then the BDRV_O_INACTIVE BDS flag is set.  This will cause
an assert, since the image is marked inactive.  Make sure we obey this
flag.

Tested-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Jeff Cody <jcody@redhat.com>
Message-id: 3996c930fa8cde8570b7a63032720d76a28fd78b.1510059970.git.jcody@redhat.com
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: Max Reitz <mreitz@redhat.com>

diff --git a/block/parallels.c b/block/parallels.c
index 2b6c6e570938d12f838024e541a0c97d5fd44e94..7b7a3efa1d46dc11d7195903959001b9a40042a6 100644 (file)
--- a/block/parallels.c
+++ b/block/parallels.c
@@ -708,7 +708,7 @@ static int parallels_open(BlockDriverState *bs, QDict *options, int flags,
         s->prealloc_mode = PRL_PREALLOC_MODE_FALLOCATE;
     }
 
-    if (flags & BDRV_O_RDWR) {
+    if ((flags & BDRV_O_RDWR) && !(flags & BDRV_O_INACTIVE)) {
         s->header->inuse = cpu_to_le32(HEADER_INUSE_MAGIC);
         ret = parallels_update_header(bs);
         if (ret < 0) {
@@ -741,12 +741,9 @@ static void parallels_close(BlockDriverState *bs)
 {
     BDRVParallelsState *s = bs->opaque;
 
-    if (bs->open_flags & BDRV_O_RDWR) {
+    if ((bs->open_flags & BDRV_O_RDWR) && !(bs->open_flags & BDRV_O_INACTIVE)) {
         s->header->inuse = 0;
         parallels_update_header(bs);
-    }
-
-    if (bs->open_flags & BDRV_O_RDWR) {
         bdrv_truncate(bs->file, s->data_end << BDRV_SECTOR_BITS,
                       PREALLOC_MODE_OFF, NULL);
     }