From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33284) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VGQzq-0005wG-Kz for qemu-devel@nongnu.org; Mon, 02 Sep 2013 06:04:40 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1VGQzk-0003RA-MH for qemu-devel@nongnu.org; Mon, 02 Sep 2013 06:04:34 -0400 Received: from mx1.redhat.com ([209.132.183.28]:38971) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VGQzk-0003R0-Da for qemu-devel@nongnu.org; Mon, 02 Sep 2013 06:04:28 -0400 Received: from int-mx01.intmail.prod.int.phx2.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id r82A4Rd3024103 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Mon, 2 Sep 2013 06:04:28 -0400 From: Max Reitz Date: Mon, 2 Sep 2013 12:04:04 +0200 Message-Id: <1378116246-12855-4-git-send-email-mreitz@redhat.com> In-Reply-To: <1378116246-12855-1-git-send-email-mreitz@redhat.com> References: <1378116246-12855-1-git-send-email-mreitz@redhat.com> Subject: [Qemu-devel] [PATCH v4 3/5] qcow2: Save refcount order in BDRVQcowState List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Kevin Wolf , Stefan Hajnoczi , Max Reitz Save the image refcount order in BDRVQcowState. This will be relevant for future code supporting different refcount orders than four and also for code that needs to verify a certain refcount order for an opened image. Signed-off-by: Max Reitz --- block/qcow2.c | 3 ++- block/qcow2.h | 1 + 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/block/qcow2.c b/block/qcow2.c index aeb2ebb..28b104e 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -455,6 +455,7 @@ static int qcow2_open(BlockDriverState *bs, QDict *options, int flags) ret = -ENOTSUP; goto fail; } + s->refcount_order = header.refcount_order; if (header.cluster_bits < MIN_CLUSTER_BITS || header.cluster_bits > MAX_CLUSTER_BITS) { @@ -1133,7 +1134,7 @@ int qcow2_update_header(BlockDriverState *bs) .incompatible_features = cpu_to_be64(s->incompatible_features), .compatible_features = cpu_to_be64(s->compatible_features), .autoclear_features = cpu_to_be64(s->autoclear_features), - .refcount_order = cpu_to_be32(3 + REFCOUNT_SHIFT), + .refcount_order = cpu_to_be32(s->refcount_order), .header_length = cpu_to_be32(header_length), }; diff --git a/block/qcow2.h b/block/qcow2.h index 25176ac..b070709 100644 --- a/block/qcow2.h +++ b/block/qcow2.h @@ -199,6 +199,7 @@ typedef struct BDRVQcowState { int flags; int qcow_version; bool use_lazy_refcounts; + int refcount_order; bool discard_passthrough[QCOW2_DISCARD_MAX]; -- 1.8.3.1