From patchwork Tue Feb 12 07:00:22 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Miroslav Rezanina X-Patchwork-Id: 219733 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 0E19A2C031C for ; Tue, 12 Feb 2013 18:01:03 +1100 (EST) Received: from localhost ([::1]:59677 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1U59rQ-000154-Uu for incoming@patchwork.ozlabs.org; Tue, 12 Feb 2013 02:01:00 -0500 Received: from eggs.gnu.org ([208.118.235.92]:48398) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1U59rB-00014m-1I for qemu-devel@nongnu.org; Tue, 12 Feb 2013 02:00:47 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1U59r6-0007En-AW for qemu-devel@nongnu.org; Tue, 12 Feb 2013 02:00:44 -0500 Received: from mx1.redhat.com ([209.132.183.28]:32721) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1U59r6-0007Ed-2d for qemu-devel@nongnu.org; Tue, 12 Feb 2013 02:00:40 -0500 Received: from int-mx02.intmail.prod.int.phx2.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id r1C70ccf030885 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Tue, 12 Feb 2013 02:00:39 -0500 Received: from lws.brq.redhat.com (dhcp-1-222.brq.redhat.com [10.34.1.222]) by int-mx02.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id r1C70RqS012233; Tue, 12 Feb 2013 02:00:37 -0500 From: Miroslav Rezanina To: qemu-devel@nongnu.org Date: Tue, 12 Feb 2013 08:00:22 +0100 Message-Id: <916a8d4fa81f0209cc99239c8d232fdb932ea6b3.1360651942.git.mrezanin@redhat.com> In-Reply-To: References: In-Reply-To: References: To: qemu-devel@nongnu.org X-Scanned-By: MIMEDefang 2.67 on 10.5.11.12 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 209.132.183.28 Cc: kwolf@redhat.com, pbonzini@redhat.com, Miroslav Rezanina , stefanha@redhat.com Subject: [Qemu-devel] [PATCH v10 1/4] block: Add synchronous wrapper for bdrv_co_is_allocated_above 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 There's no synchronous wrapper for bdrv_co_is_allocated_above function so it's not possible to check for sector allocation in an image with a backing file. Signed-off-by: Miroslav Rezanina --- block.c | 39 +++++++++++++++++++++++++++++++++++++++ include/block/block.h | 2 ++ 2 files changed, 41 insertions(+), 0 deletions(-) diff --git a/block.c b/block.c index 50dab8e..08039d2 100644 --- a/block.c +++ b/block.c @@ -2681,6 +2681,7 @@ int bdrv_has_zero_init(BlockDriverState *bs) typedef struct BdrvCoIsAllocatedData { BlockDriverState *bs; + BlockDriverState *base; int64_t sector_num; int nb_sectors; int *pnum; @@ -2813,6 +2814,44 @@ int coroutine_fn bdrv_co_is_allocated_above(BlockDriverState *top, return 0; } +/* Coroutine wrapper for bdrv_is_allocated_above() */ +static void coroutine_fn bdrv_is_allocated_above_co_entry(void *opaque) +{ + BdrvCoIsAllocatedData *data = opaque; + BlockDriverState *top = data->bs; + BlockDriverState *base = data->base; + + data->ret = bdrv_co_is_allocated_above(top, base, data->sector_num, + data->nb_sectors, data->pnum); + data->done = true; +} + +/* + * Synchronous wrapper around bdrv_co_is_allocated_above(). + * + * See bdrv_co_is_allocated_above() for details. + */ +int bdrv_is_allocated_above(BlockDriverState *top, BlockDriverState *base, + int64_t sector_num, int nb_sectors, int *pnum) +{ + Coroutine *co; + BdrvCoIsAllocatedData data = { + .bs = top, + .base = base, + .sector_num = sector_num, + .nb_sectors = nb_sectors, + .pnum = pnum, + .done = false, + }; + + co = qemu_coroutine_create(bdrv_is_allocated_above_co_entry); + qemu_coroutine_enter(co, &data); + while (!data.done) { + qemu_aio_wait(); + } + return data.ret; +} + 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 ce61883..8309fc1 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -279,6 +279,8 @@ int bdrv_co_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors); int bdrv_has_zero_init(BlockDriverState *bs); int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors, int *pnum); +int bdrv_is_allocated_above(BlockDriverState *top, BlockDriverState *base, + int64_t sector_num, int nb_sectors, int *pnum); void bdrv_set_on_error(BlockDriverState *bs, BlockdevOnError on_read_error, BlockdevOnError on_write_error);