iscsi: do not assume device is zero initialized

Without any complex checks we can't assume that an
iscsi target is initialized to zero.

Signed-off-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit f807ecd5741325fe0d281199ff22cdda0acb6a7a)

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>

diff --git a/block/iscsi.c b/block/iscsi.c
index 1836c71b693f534f8ff98fa6e035ac2e942585c8..11fd37e6433f02121f70df2e5ad4c1d5f51ae0fb 100644 (file)
--- a/block/iscsi.c
+++ b/block/iscsi.c
@@ -955,6 +955,11 @@ static void iscsi_close(BlockDriverState *bs)
     memset(iscsilun, 0, sizeof(IscsiLun));
 }
 
+static int iscsi_has_zero_init(BlockDriverState *bs)
+{
+    return 0;
+}
+
 static BlockDriver bdrv_iscsi = {
     .format_name     = "iscsi",
     .protocol_name   = "iscsi",
@@ -970,6 +975,7 @@ static BlockDriver bdrv_iscsi = {
     .bdrv_aio_flush  = iscsi_aio_flush,
 
     .bdrv_aio_discard = iscsi_aio_discard,
+    .bdrv_has_zero_init = iscsi_has_zero_init,
 
 #ifdef __linux__
     .bdrv_ioctl       = iscsi_ioctl,