From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:44643) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Yn0EZ-00050q-AJ for qemu-devel@nongnu.org; Tue, 28 Apr 2015 03:47:12 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Yn0EU-0004A3-TX for qemu-devel@nongnu.org; Tue, 28 Apr 2015 03:47:11 -0400 Received: from mailhub.sw.ru ([195.214.232.25]:38789 helo=relay.sw.ru) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Yn0EU-00049c-HR for qemu-devel@nongnu.org; Tue, 28 Apr 2015 03:47:06 -0400 From: "Denis V. Lunev" Date: Tue, 28 Apr 2015 10:46:38 +0300 Message-Id: <1430207220-24458-6-git-send-email-den@openvz.org> In-Reply-To: <1430207220-24458-1-git-send-email-den@openvz.org> References: <1430207220-24458-1-git-send-email-den@openvz.org> Subject: [Qemu-devel] [PATCH 05/27] block/parallels: add get_block_status List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , "Denis V. Lunev" , qemu-devel@nongnu.org, Stefan Hajnoczi , Roman Kagan From: Roman Kagan Implement VFS method for get_block_status to Parallels format driver. qemu_co_mutex_lock is not necessary yet (the driver is read-only) but will be necessary very soon when write will be supported. Signed-off-by: Roman Kagan Reviewed-by: Denis V. Lunev Signed-off-by: Denis V. Lunev CC: Kevin Wolf CC: Stefan Hajnoczi --- block/parallels.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/block/parallels.c b/block/parallels.c index 8770c82..b469984 100644 --- a/block/parallels.c +++ b/block/parallels.c @@ -166,6 +166,26 @@ static int cluster_remainder(BDRVParallelsState *s, int64_t sector_num, return MIN(nb_sectors, ret); } +static int64_t coroutine_fn parallels_co_get_block_status(BlockDriverState *bs, + int64_t sector_num, int nb_sectors, int *pnum) +{ + BDRVParallelsState *s = bs->opaque; + int64_t offset; + + qemu_co_mutex_lock(&s->lock); + offset = seek_to_sector(s, sector_num); + qemu_co_mutex_unlock(&s->lock); + + *pnum = cluster_remainder(s, sector_num, nb_sectors); + + if (offset < 0) { + return 0; + } + + return (offset << BDRV_SECTOR_BITS) | + BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID; +} + static int parallels_read(BlockDriverState *bs, int64_t sector_num, uint8_t *buf, int nb_sectors) { @@ -213,6 +233,7 @@ static BlockDriver bdrv_parallels = { .bdrv_open = parallels_open, .bdrv_read = parallels_co_read, .bdrv_close = parallels_close, + .bdrv_co_get_block_status = parallels_co_get_block_status, }; static void bdrv_parallels_init(void) -- 1.9.1