From patchwork Wed Dec 10 10:34:18 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 419563 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 9A80314009B for ; Wed, 10 Dec 2014 21:59:30 +1100 (AEDT) Received: from localhost ([::1]:44666 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XyezQ-00080c-Lq for incoming@patchwork.ozlabs.org; Wed, 10 Dec 2014 05:59:28 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:59306) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XyecM-0000ka-4Q for qemu-devel@nongnu.org; Wed, 10 Dec 2014 05:35:43 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XyecG-0008Hm-Pw for qemu-devel@nongnu.org; Wed, 10 Dec 2014 05:35:38 -0500 Received: from mx1.redhat.com ([209.132.183.28]:52114) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XyecG-0008HQ-H3 for qemu-devel@nongnu.org; Wed, 10 Dec 2014 05:35:32 -0500 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id sBAAZWrG021765 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL) for ; Wed, 10 Dec 2014 05:35:32 -0500 Received: from noname.str.redhat.com (dhcp-192-197.str.redhat.com [10.33.192.197]) by int-mx10.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id sBAAYeSX016328; Wed, 10 Dec 2014 05:35:31 -0500 From: Kevin Wolf To: qemu-devel@nongnu.org Date: Wed, 10 Dec 2014 11:34:18 +0100 Message-Id: <1418207679-32260-53-git-send-email-kwolf@redhat.com> In-Reply-To: <1418207679-32260-1-git-send-email-kwolf@redhat.com> References: <1418207679-32260-1-git-send-email-kwolf@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.23 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 209.132.183.28 Cc: kwolf@redhat.com Subject: [Qemu-devel] [PULL 52/73] block: Omit bdrv_find_format for essential drivers X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org From: Max Reitz We can always assume raw, file and qcow2 being available; so do not use bdrv_find_format() to locate their BlockDriver objects but statically reference the respective objects. Cc: qemu-stable@nongnu.org Signed-off-by: Max Reitz Signed-off-by: Kevin Wolf --- block.c | 17 +++++------------ block/qcow2.c | 7 +++---- 2 files changed, 8 insertions(+), 16 deletions(-) diff --git a/block.c b/block.c index 591fbe4..e995008 100644 --- a/block.c +++ b/block.c @@ -629,7 +629,7 @@ BlockDriver *bdrv_find_protocol(const char *filename, } if (!path_has_protocol(filename) || !allow_protocol_prefix) { - return bdrv_find_format("file"); + return &bdrv_file; } p = strchr(filename, ':'); @@ -690,12 +690,7 @@ static int find_image_format(BlockDriverState *bs, const char *filename, /* Return the raw BlockDriver * to scsi-generic devices or empty drives */ if (bs->sg || !bdrv_is_inserted(bs) || bdrv_getlength(bs) == 0) { - drv = bdrv_find_format("raw"); - if (!drv) { - error_setg(errp, "Could not find raw image format"); - ret = -ENOENT; - } - *pdrv = drv; + *pdrv = &bdrv_raw; return ret; } @@ -1315,7 +1310,6 @@ int bdrv_append_temp_snapshot(BlockDriverState *bs, int flags, Error **errp) /* TODO: extra byte is a hack to ensure MAX_PATH space on Windows. */ char *tmp_filename = g_malloc0(PATH_MAX + 1); int64_t total_size; - BlockDriver *bdrv_qcow2; QemuOpts *opts = NULL; QDict *snapshot_options; BlockDriverState *bs_snapshot; @@ -1340,11 +1334,10 @@ int bdrv_append_temp_snapshot(BlockDriverState *bs, int flags, Error **errp) goto out; } - bdrv_qcow2 = bdrv_find_format("qcow2"); - opts = qemu_opts_create(bdrv_qcow2->create_opts, NULL, 0, + opts = qemu_opts_create(bdrv_qcow2.create_opts, NULL, 0, &error_abort); qemu_opt_set_number(opts, BLOCK_OPT_SIZE, total_size); - ret = bdrv_create(bdrv_qcow2, tmp_filename, opts, &local_err); + ret = bdrv_create(&bdrv_qcow2, tmp_filename, opts, &local_err); qemu_opts_del(opts); if (ret < 0) { error_setg_errno(errp, -ret, "Could not create temporary overlay " @@ -1364,7 +1357,7 @@ int bdrv_append_temp_snapshot(BlockDriverState *bs, int flags, Error **errp) bs_snapshot = bdrv_new(); ret = bdrv_open(&bs_snapshot, NULL, NULL, snapshot_options, - flags, bdrv_qcow2, &local_err); + flags, &bdrv_qcow2, &local_err); if (ret < 0) { error_propagate(errp, local_err); goto out; diff --git a/block/qcow2.c b/block/qcow2.c index cbc327b..d597b2d 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -1915,10 +1915,9 @@ static int qcow2_create2(const char *filename, int64_t total_size, * refcount of the cluster that is occupied by the header and the refcount * table) */ - BlockDriver* drv = bdrv_find_format("qcow2"); - assert(drv != NULL); ret = bdrv_open(&bs, filename, NULL, NULL, - BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH, drv, &local_err); + BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH, + &bdrv_qcow2, &local_err); if (ret < 0) { error_propagate(errp, local_err); goto out; @@ -1970,7 +1969,7 @@ static int qcow2_create2(const char *filename, int64_t total_size, /* Reopen the image without BDRV_O_NO_FLUSH to flush it before returning */ ret = bdrv_open(&bs, filename, NULL, NULL, BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_NO_BACKING, - drv, &local_err); + &bdrv_qcow2, &local_err); if (local_err) { error_propagate(errp, local_err); goto out;