From patchwork Thu Jan 17 07:40:02 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wayne Xia X-Patchwork-Id: 213162 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id A71D12C007C for ; Thu, 17 Jan 2013 19:19:27 +1100 (EST) Received: from localhost ([::1]:37384 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Tvk82-0006oN-TM for incoming@patchwork.ozlabs.org; Thu, 17 Jan 2013 02:43:14 -0500 Received: from eggs.gnu.org ([208.118.235.92]:57953) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Tvk7G-0004z5-IG for qemu-devel@nongnu.org; Thu, 17 Jan 2013 02:42:27 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Tvk7F-0001uJ-9b for qemu-devel@nongnu.org; Thu, 17 Jan 2013 02:42:26 -0500 Received: from e23smtp09.au.ibm.com ([202.81.31.142]:42079) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Tvk7E-0001u6-Nq for qemu-devel@nongnu.org; Thu, 17 Jan 2013 02:42:25 -0500 Received: from /spool/local by e23smtp09.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Thu, 17 Jan 2013 17:36:21 +1000 Received: from d23dlp02.au.ibm.com (202.81.31.213) by e23smtp09.au.ibm.com (202.81.31.206) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; Thu, 17 Jan 2013 17:36:19 +1000 Received: from d23relay03.au.ibm.com (d23relay03.au.ibm.com [9.190.235.21]) by d23dlp02.au.ibm.com (Postfix) with ESMTP id 1868E2BB0054 for ; Thu, 17 Jan 2013 18:42:21 +1100 (EST) Received: from d23av01.au.ibm.com (d23av01.au.ibm.com [9.190.234.96]) by d23relay03.au.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id r0H7gKpx56426700 for ; Thu, 17 Jan 2013 18:42:20 +1100 Received: from d23av01.au.ibm.com (loopback [127.0.0.1]) by d23av01.au.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id r0H7gKX8012097 for ; Thu, 17 Jan 2013 18:42:20 +1100 Received: from RH63Wenchao (wenchaox.cn.ibm.com [9.115.122.253]) by d23av01.au.ibm.com (8.14.4/8.13.1/NCO v10.0 AVin) with ESMTP id r0H7e01t007864; Thu, 17 Jan 2013 18:42:18 +1100 From: Wenchao Xia To: qemu-devel@nongnu.org Date: Thu, 17 Jan 2013 15:40:02 +0800 Message-Id: <1358408410-22187-6-git-send-email-xiawenc@linux.vnet.ibm.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1358408410-22187-1-git-send-email-xiawenc@linux.vnet.ibm.com> References: <1358408410-22187-1-git-send-email-xiawenc@linux.vnet.ibm.com> X-Content-Scanned: Fidelis XPS MAILER x-cbid: 13011707-3568-0000-0000-0000030A539F X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.4.x-2.6.x [generic] X-Received-From: 202.81.31.142 Cc: aliguori@us.ibm.com, phrdina@redhat.com, stefanha@gmail.com, armbru@redhat.com, lcapitulino@redhat.com, pbonzini@redhat.com, Wenchao Xia Subject: [Qemu-devel] [PATCH V4 05/13] block: add image info query function bdrv_query_image_info() 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 This patch add function bdrv_query_image_info(), which will return image info in qmp object format. The implementation code are mostly copied from qemu-img.c, but use block layer function to get snapshot info. A check with bdrv_can_read_snapshot(), was done before collecting snapshot info. Signed-off-by: Wenchao Xia Reviewed-by: Eric Blake --- block.c | 73 +++++++++++++++++++++++++++++++++++++++++++++++++ include/block/block.h | 1 + 2 files changed, 74 insertions(+), 0 deletions(-) diff --git a/block.c b/block.c index fba1be4..245a082 100644 --- a/block.c +++ b/block.c @@ -2888,6 +2888,79 @@ SnapshotInfoList *bdrv_query_snapshot_infolist(BlockDriverState *bs, return head; } +/* collect all internal snapshot info in a image for ImageInfo */ +static void collect_snapshots_info(BlockDriverState *bs, + ImageInfo *info, + Error **errp) +{ + SnapshotInfoList *info_list; + + if (!bdrv_can_read_snapshot(bs)) { + return; + } + info_list = bdrv_query_snapshot_infolist(bs, NULL, NULL, errp); + if (info_list != NULL) { + info->has_snapshots = true; + info->snapshots = info_list; + } +} + +static void collect_image_info(BlockDriverState *bs, + ImageInfo *info) +{ + uint64_t total_sectors; + char backing_filename[1024]; + char backing_filename2[1024]; + BlockDriverInfo bdi; + const char *filename; + + filename = bdrv_get_filename(bs); + bdrv_get_geometry(bs, &total_sectors); + + info->filename = g_strdup(filename); + info->format = g_strdup(bdrv_get_format_name(bs)); + info->virtual_size = total_sectors * 512; + info->actual_size = bdrv_get_allocated_file_size(bs); + info->has_actual_size = info->actual_size >= 0; + if (bdrv_is_encrypted(bs)) { + info->encrypted = true; + info->has_encrypted = true; + } + if (bdrv_get_info(bs, &bdi) >= 0) { + if (bdi.cluster_size != 0) { + info->cluster_size = bdi.cluster_size; + info->has_cluster_size = true; + } + info->dirty_flag = bdi.is_dirty; + info->has_dirty_flag = true; + } + bdrv_get_backing_filename(bs, backing_filename, sizeof(backing_filename)); + if (backing_filename[0] != '\0') { + info->backing_filename = g_strdup(backing_filename); + info->has_backing_filename = true; + bdrv_get_full_backing_filename(bs, backing_filename2, + sizeof(backing_filename2)); + + if (strcmp(backing_filename, backing_filename2) != 0) { + info->full_backing_filename = g_strdup(backing_filename2); + info->has_full_backing_filename = true; + } + + if (bs->backing_format[0]) { + info->backing_filename_format = g_strdup(bs->backing_format); + info->has_backing_filename_format = true; + } + } +} + +ImageInfo *bdrv_query_image_info(BlockDriverState *bs, Error **errp) +{ + ImageInfo *info = g_new0(ImageInfo, 1); + collect_image_info(bs, info); + collect_snapshots_info(bs, info, errp); + return info; +} + BlockInfo *bdrv_query_info(BlockDriverState *bs) { BlockInfo *info = g_malloc0(sizeof(*info)); diff --git a/include/block/block.h b/include/block/block.h index ce18d4b..b6f80c3 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -323,6 +323,7 @@ SnapshotInfoList *bdrv_query_snapshot_infolist(BlockDriverState *bs, SnapshotFilterFunc filter, void *opaque, Error **errp); +ImageInfo *bdrv_query_image_info(BlockDriverState *bs, Error **errp); BlockInfo *bdrv_query_info(BlockDriverState *s); BlockStats *bdrv_query_stats(const BlockDriverState *bs); int bdrv_can_read_snapshot(BlockDriverState *bs);