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Mon, 7 Sep 2020 11:10:40 +0000 (UTC) Received: from linux.fritz.box.com (ovpn-114-154.ams2.redhat.com [10.36.114.154]) by smtp.corp.redhat.com (Postfix) with ESMTP id 636977E435; Mon, 7 Sep 2020 11:10:39 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PULL 43/64] block: Use child access functions for QAPI queries Date: Mon, 7 Sep 2020 13:09:15 +0200 Message-Id: <20200907110936.261684-44-kwolf@redhat.com> In-Reply-To: <20200907110936.261684-1-kwolf@redhat.com> References: <20200907110936.261684-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kwolf@redhat.com X-Mimecast-Spam-Score: 0.001 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=216.205.24.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/07 05:27:53 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.1, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, peter.maydell@linaro.org, qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Max Reitz query-block, query-named-block-nodes, and query-blockstats now return any filtered child under "backing", not just bs->backing or COW children. This is so that filters do not interrupt the reported backing chain. This changes the output for iotest 184, as the throttled node now appears as a backing child. Signed-off-by: Max Reitz Reviewed-by: Andrey Shinkevich Reviewed-by: Kevin Wolf --- block/qapi.c | 33 ++++++++++++++++++++------------- tests/qemu-iotests/184.out | 8 +++++++- 2 files changed, 27 insertions(+), 14 deletions(-) diff --git a/block/qapi.c b/block/qapi.c index c57b42d86d..2628323b63 100644 --- a/block/qapi.c +++ b/block/qapi.c @@ -163,9 +163,13 @@ BlockDeviceInfo *bdrv_block_device_info(BlockBackend *blk, break; } - if (bs0->drv && bs0->backing) { + if (bs0->drv && bdrv_filter_or_cow_child(bs0)) { + /* + * Put any filtered child here (for backwards compatibility to when + * we put bs0->backing here, which might be any filtered child). + */ info->backing_file_depth++; - bs0 = bs0->backing->bs; + bs0 = bdrv_filter_or_cow_bs(bs0); (*p_image_info)->has_backing_image = true; p_image_info = &((*p_image_info)->backing_image); } else { @@ -174,9 +178,8 @@ BlockDeviceInfo *bdrv_block_device_info(BlockBackend *blk, /* Skip automatically inserted nodes that the user isn't aware of for * query-block (blk != NULL), but not for query-named-block-nodes */ - while (blk && bs0->drv && bs0->implicit) { - bs0 = backing_bs(bs0); - assert(bs0); + if (blk) { + bs0 = bdrv_skip_implicit_filters(bs0); } } @@ -362,9 +365,7 @@ static void bdrv_query_info(BlockBackend *blk, BlockInfo **p_info, char *qdev; /* Skip automatically inserted nodes that the user isn't aware of */ - while (bs && bs->drv && bs->implicit) { - bs = backing_bs(bs); - } + bs = bdrv_skip_implicit_filters(bs); info->device = g_strdup(blk_name(blk)); info->type = g_strdup("unknown"); @@ -527,6 +528,7 @@ static BlockStats *bdrv_query_bds_stats(BlockDriverState *bs, bool blk_level) { BdrvChild *parent_child; + BlockDriverState *filter_or_cow_bs; BlockStats *s = NULL; s = g_malloc0(sizeof(*s)); @@ -539,9 +541,8 @@ static BlockStats *bdrv_query_bds_stats(BlockDriverState *bs, /* Skip automatically inserted nodes that the user isn't aware of in * a BlockBackend-level command. Stay at the exact node for a node-level * command. */ - while (blk_level && bs->drv && bs->implicit) { - bs = backing_bs(bs); - assert(bs); + if (blk_level) { + bs = bdrv_skip_implicit_filters(bs); } if (bdrv_get_node_name(bs)[0]) { @@ -587,9 +588,15 @@ static BlockStats *bdrv_query_bds_stats(BlockDriverState *bs, s->parent = bdrv_query_bds_stats(parent_child->bs, blk_level); } - if (blk_level && bs->backing) { + filter_or_cow_bs = bdrv_filter_or_cow_bs(bs); + if (blk_level && filter_or_cow_bs) { + /* + * Put any filtered or COW child here (for backwards + * compatibility to when we put bs0->backing here, which might + * be either) + */ s->has_backing = true; - s->backing = bdrv_query_bds_stats(bs->backing->bs, blk_level); + s->backing = bdrv_query_bds_stats(filter_or_cow_bs, blk_level); } return s; diff --git a/tests/qemu-iotests/184.out b/tests/qemu-iotests/184.out index dec4017ad5..87c73070e3 100644 --- a/tests/qemu-iotests/184.out +++ b/tests/qemu-iotests/184.out @@ -27,6 +27,12 @@ Testing: "iops_rd": 0, "detect_zeroes": "off", "image": { + "backing-image": { + "virtual-size": 1073741824, + "filename": "null-co://", + "format": "null-co", + "actual-size": 0 + }, "virtual-size": 1073741824, "filename": "json:{\"throttle-group\": \"group0\", \"driver\": \"throttle\", \"file\": {\"driver\": \"null-co\"}}", "format": "throttle", @@ -35,7 +41,7 @@ Testing: "iops_wr": 0, "ro": false, "node-name": "throttle0", - "backing_file_depth": 0, + "backing_file_depth": 1, "drv": "throttle", "iops": 0, "bps_wr": 0,