From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([140.186.70.92]:54268) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ROuGT-0007mA-BP for qemu-devel@nongnu.org; Fri, 11 Nov 2011 11:47:43 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ROuGR-0000qk-Fn for qemu-devel@nongnu.org; Fri, 11 Nov 2011 11:47:41 -0500 Received: from mtagate3.uk.ibm.com ([194.196.100.163]:33879) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ROuGR-0000qS-6R for qemu-devel@nongnu.org; Fri, 11 Nov 2011 11:47:39 -0500 Received: from d06nrmr1307.portsmouth.uk.ibm.com (d06nrmr1307.portsmouth.uk.ibm.com [9.149.38.129]) by mtagate3.uk.ibm.com (8.13.1/8.13.1) with ESMTP id pABGlcwl029869 for ; Fri, 11 Nov 2011 16:47:38 GMT Received: from d06av09.portsmouth.uk.ibm.com (d06av09.portsmouth.uk.ibm.com [9.149.37.250]) by d06nrmr1307.portsmouth.uk.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id pABGlcTr2502694 for ; Fri, 11 Nov 2011 16:47:38 GMT Received: from d06av09.portsmouth.uk.ibm.com (loopback [127.0.0.1]) by d06av09.portsmouth.uk.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id pABGlbXc006520 for ; Fri, 11 Nov 2011 09:47:38 -0700 From: Stefan Hajnoczi Date: Fri, 11 Nov 2011 16:47:22 +0000 Message-Id: <1321030042-20446-11-git-send-email-stefanha@linux.vnet.ibm.com> In-Reply-To: <1321030042-20446-1-git-send-email-stefanha@linux.vnet.ibm.com> References: <1321030042-20446-1-git-send-email-stefanha@linux.vnet.ibm.com> Subject: [Qemu-devel] [PATCH 10/10] block: add bdrv_co_is_allocated() interface List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Kevin Wolf , Paolo Bonzini , Marcelo Tosatti , Stefan Hajnoczi This patch introduce the public bdrv_co_is_allocated() interface which can be used to query image allocation status while the VM is running. Signed-off-by: Stefan Hajnoczi --- block.c | 37 ++++++++++++++++++++++++------------- block.h | 2 ++ 2 files changed, 26 insertions(+), 13 deletions(-) diff --git a/block.c b/block.c index 082734b..83bdfb6 100644 --- a/block.c +++ b/block.c @@ -1780,17 +1780,6 @@ typedef struct BdrvCoIsAllocatedData { bool done; } BdrvCoIsAllocatedData; -/* Coroutine wrapper for bdrv_is_allocated() */ -static void coroutine_fn bdrv_is_allocated_co_entry(void *opaque) -{ - BdrvCoIsAllocatedData *data = opaque; - BlockDriverState *bs = data->bs; - - data->ret = bs->drv->bdrv_co_is_allocated(bs, data->sector_num, - data->nb_sectors, data->pnum); - data->done = true; -} - /* * Returns true iff the specified sector is present in the disk image. Drivers * not implementing the functionality are assumed to not support backing files, @@ -1802,8 +1791,8 @@ static void coroutine_fn bdrv_is_allocated_co_entry(void *opaque) * * 'nb_sectors' is the max value 'pnum' should be set to. */ -int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors, - int *pnum) +int coroutine_fn bdrv_co_is_allocated(BlockDriverState *bs, int64_t sector_num, + int nb_sectors, int *pnum) { if (!bs->drv->bdrv_co_is_allocated) { int64_t n; @@ -1816,6 +1805,28 @@ int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors, return 1; } + return bs->drv->bdrv_co_is_allocated(bs, sector_num, nb_sectors, pnum); +} + +/* Coroutine wrapper for bdrv_is_allocated() */ +static void coroutine_fn bdrv_is_allocated_co_entry(void *opaque) +{ + BdrvCoIsAllocatedData *data = opaque; + BlockDriverState *bs = data->bs; + + data->ret = bdrv_co_is_allocated(bs, data->sector_num, data->nb_sectors, + data->pnum); + data->done = true; +} + +/* + * Synchronous wrapper around bdrv_co_is_allocated(). + * + * See bdrv_co_is_allocated() for details. + */ +int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors, + int *pnum) +{ Coroutine *co; BdrvCoIsAllocatedData data = { .bs = bs, diff --git a/block.h b/block.h index 38cd748..c459fad 100644 --- a/block.h +++ b/block.h @@ -128,6 +128,8 @@ int coroutine_fn bdrv_co_readv(BlockDriverState *bs, int64_t sector_num, int nb_sectors, QEMUIOVector *qiov); int coroutine_fn bdrv_co_writev(BlockDriverState *bs, int64_t sector_num, int nb_sectors, QEMUIOVector *qiov); +int coroutine_fn bdrv_co_is_allocated(BlockDriverState *bs, int64_t sector_num, + int nb_sectors, int *pnum); int bdrv_truncate(BlockDriverState *bs, int64_t offset); int64_t bdrv_getlength(BlockDriverState *bs); int64_t bdrv_get_allocated_file_size(BlockDriverState *bs); -- 1.7.7.1