From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48392) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cDolL-00037W-IX for qemu-devel@nongnu.org; Mon, 05 Dec 2016 03:36:40 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cDolH-0000ax-Kk for qemu-devel@nongnu.org; Mon, 05 Dec 2016 03:36:39 -0500 From: zhanghailiang Date: Mon, 5 Dec 2016 16:35:04 +0800 Message-ID: <1480926904-17596-7-git-send-email-zhang.zhanghailiang@huawei.com> In-Reply-To: <1480926904-17596-1-git-send-email-zhang.zhanghailiang@huawei.com> References: <1480926904-17596-1-git-send-email-zhang.zhanghailiang@huawei.com> MIME-Version: 1.0 Content-Type: text/plain Subject: [Qemu-devel] [PATCH RFC v2 6/6] nbd/replication: implement .bdrv_get_info() for nbd and replication driver List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org, qemu-block@nongnu.org Cc: stefanha@redhat.com, kwolf@redhat.com, mreitz@redhat.com, pbonzini@redhat.com, wency@cn.fujitsu.com, xiecl.fnst@cn.fujitsu.com, zhanghailiang , Eric Blake Without this callback, there will be an error reports in the primary side: "qemu-system-x86_64: Couldn't determine the cluster size of the target image, which has no backing file: Operation not supported Aborting, since this may create an unusable destination image" For nbd driver, it doesn't have cluster size, so here we return a fake value for it. This patch should be dropped if Eric's nbd patch be merged. https://lists.gnu.org/archive/html/qemu-devel/2016-04/msg03567.html Cc: Eric Blake Signed-off-by: zhanghailiang Signed-off-by: Wen Congyang --- block/nbd.c | 12 ++++++++++++ block/replication.c | 6 ++++++ 2 files changed, 18 insertions(+) diff --git a/block/nbd.c b/block/nbd.c index 35f24be..b71a13d 100644 --- a/block/nbd.c +++ b/block/nbd.c @@ -43,6 +43,8 @@ #define EN_OPTSTR ":exportname=" +#define NBD_FAKE_CLUSTER_SIZE 512 + typedef struct BDRVNBDState { NBDClientSession client; @@ -552,6 +554,13 @@ static void nbd_refresh_filename(BlockDriverState *bs, QDict *options) bs->full_open_options = opts; } +static int nbd_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) +{ + bdi->cluster_size = NBD_FAKE_CLUSTER_SIZE; + + return 0; +} + static BlockDriver bdrv_nbd = { .format_name = "nbd", .protocol_name = "nbd", @@ -569,6 +578,7 @@ static BlockDriver bdrv_nbd = { .bdrv_detach_aio_context = nbd_detach_aio_context, .bdrv_attach_aio_context = nbd_attach_aio_context, .bdrv_refresh_filename = nbd_refresh_filename, + .bdrv_get_info = nbd_get_info, }; static BlockDriver bdrv_nbd_tcp = { @@ -588,6 +598,7 @@ static BlockDriver bdrv_nbd_tcp = { .bdrv_detach_aio_context = nbd_detach_aio_context, .bdrv_attach_aio_context = nbd_attach_aio_context, .bdrv_refresh_filename = nbd_refresh_filename, + .bdrv_get_info = nbd_get_info, }; static BlockDriver bdrv_nbd_unix = { @@ -607,6 +618,7 @@ static BlockDriver bdrv_nbd_unix = { .bdrv_detach_aio_context = nbd_detach_aio_context, .bdrv_attach_aio_context = nbd_attach_aio_context, .bdrv_refresh_filename = nbd_refresh_filename, + .bdrv_get_info = nbd_get_info, }; static void bdrv_nbd_init(void) diff --git a/block/replication.c b/block/replication.c index f416ca5..5f14360 100644 --- a/block/replication.c +++ b/block/replication.c @@ -731,6 +731,11 @@ static void replication_stop(ReplicationState *rs, bool failover, Error **errp) aio_context_release(aio_context); } +static int replication_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) +{ + return bdrv_get_info(bs->file->bs, bdi); +} + BlockDriver bdrv_replication = { .format_name = "replication", .protocol_name = "replication", @@ -743,6 +748,7 @@ BlockDriver bdrv_replication = { .bdrv_co_readv = replication_co_readv, .bdrv_co_writev = replication_co_writev, + .bdrv_get_info = replication_get_info, .is_filter = true, .bdrv_recurse_is_first_non_filter = replication_recurse_is_first_non_filter, -- 1.8.3.1