From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54530) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bcYS2-000416-Lc for qemu-devel@nongnu.org; Wed, 24 Aug 2016 09:42:43 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bcYS1-000372-Mz for qemu-devel@nongnu.org; Wed, 24 Aug 2016 09:42:42 -0400 Received: from mx1.redhat.com ([209.132.183.28]:60514) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bcYS1-00036w-HU for qemu-devel@nongnu.org; Wed, 24 Aug 2016 09:42:41 -0400 From: "Dr. David Alan Gilbert (git)" Date: Wed, 24 Aug 2016 14:42:30 +0100 Message-Id: <1472046153-22123-4-git-send-email-dgilbert@redhat.com> In-Reply-To: <1472046153-22123-1-git-send-email-dgilbert@redhat.com> References: <1472046153-22123-1-git-send-email-dgilbert@redhat.com> Subject: [Qemu-devel] [RFC 3/6] migration: Add VMSTATE_UNUSED_VARRAY_UINT32 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org, mst@redhat.com, amit.shah@redhat.com, quintela@redhat.com Cc: duanj@linux.vnet.ibm.com, cornelia.huck@de.ibm.com From: "Dr. David Alan Gilbert" VMSTATE_UNUSED_VARRAY_UINT32 is used to skip a chunk of the stream that's an n-element array; note the array size and the dynamic value read never get multiplied so there's no overflow risk. Signed-off-by: Dr. David Alan Gilbert --- include/migration/vmstate.h | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/include/migration/vmstate.h b/include/migration/vmstate.h index 1638ee5..a0eff5e 100644 --- a/include/migration/vmstate.h +++ b/include/migration/vmstate.h @@ -643,6 +643,17 @@ extern const VMStateInfo vmstate_info_bitmap; .flags = VMS_BUFFER, \ } +/* Discard size * field_num bytes, where field_num is a uint32 member */ +#define VMSTATE_UNUSED_VARRAY_UINT32(_state, _test, _version, _field_num, _size) {\ + .name = "unused", \ + .field_exists = (_test), \ + .num_offset = vmstate_offset_value(_state, _field_num, uint32_t),\ + .version_id = (_version), \ + .size = (_size), \ + .info = &vmstate_info_unused_buffer, \ + .flags = VMS_VARRAY_UINT32 | VMS_BUFFER, \ +} + /* _field_size should be a int32_t field in the _state struct giving the * size of the bitmap _field in bits. */ -- 2.7.4