From patchwork Thu Jul 21 19:40:09 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Denis V. Lunev" X-Patchwork-Id: 9242421 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id D4D95602F0 for ; Thu, 21 Jul 2016 19:50:05 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C4BCD27D85 for ; Thu, 21 Jul 2016 19:50:05 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B959A27EE2; Thu, 21 Jul 2016 19:50:05 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 3008227D85 for ; Thu, 21 Jul 2016 19:50:05 +0000 (UTC) Received: from localhost ([::1]:43329 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bQJyt-0001zc-VH for patchwork-qemu-devel@patchwork.kernel.org; Thu, 21 Jul 2016 15:50:04 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:35731) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bQJpf-0002Lb-N9 for qemu-devel@nongnu.org; Thu, 21 Jul 2016 15:40:32 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bQJpZ-00011Z-Vf for qemu-devel@nongnu.org; Thu, 21 Jul 2016 15:40:30 -0400 Received: from mailhub.sw.ru ([195.214.232.25]:28798 helo=relay.sw.ru) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bQJpZ-0000ze-Iu for qemu-devel@nongnu.org; Thu, 21 Jul 2016 15:40:25 -0400 Received: from hades.sw.ru ([10.30.8.132]) by relay.sw.ru (8.13.4/8.13.4) with ESMTP id u6KBAfva027557; Wed, 20 Jul 2016 14:10:43 +0300 (MSK) From: "Denis V. Lunev" To: qemu-block@nongnu.org, qemu-devel@nongnu.org Date: Thu, 21 Jul 2016 22:40:09 +0300 Message-Id: <1469130019-18497-7-git-send-email-den@openvz.org> X-Mailer: git-send-email 2.5.0 In-Reply-To: <1469130019-18497-1-git-send-email-den@openvz.org> References: <1469130019-18497-1-git-send-email-den@openvz.org> X-detected-operating-system: by eggs.gnu.org: OpenBSD 3.x X-Received-From: 195.214.232.25 Subject: [Qemu-devel] [PATCH v6 06/16] vmdk: add vmdk_co_pwritev_compressed X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , Pavel Butsykin , Jeff Cody , Markus Armbruster , Stefan Hajnoczi , den@openvz.org, John Snow Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Pavel Butsykin Added implementation of the vmdk_co_pwritev_compressed function that will allow us to safely use compressed writes for the vmdk from running VMs. Signed-off-by: Pavel Butsykin Reviewed-by: Stefan Hajnoczi Signed-off-by: Denis V. Lunev CC: Jeff Cody CC: Markus Armbruster CC: Eric Blake CC: John Snow CC: Stefan Hajnoczi CC: Kevin Wolf --- block/vmdk.c | 55 +++++-------------------------------------------------- 1 file changed, 5 insertions(+), 50 deletions(-) diff --git a/block/vmdk.c b/block/vmdk.c index 46d474e..a11c27a 100644 --- a/block/vmdk.c +++ b/block/vmdk.c @@ -1645,56 +1645,11 @@ vmdk_co_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes, return ret; } -typedef struct VmdkWriteCompressedCo { - BlockDriverState *bs; - int64_t sector_num; - const uint8_t *buf; - int nb_sectors; - int ret; -} VmdkWriteCompressedCo; - -static void vmdk_co_write_compressed(void *opaque) -{ - VmdkWriteCompressedCo *co = opaque; - QEMUIOVector local_qiov; - uint64_t offset = co->sector_num * BDRV_SECTOR_SIZE; - uint64_t bytes = co->nb_sectors * BDRV_SECTOR_SIZE; - - struct iovec iov = (struct iovec) { - .iov_base = (uint8_t*) co->buf, - .iov_len = bytes, - }; - qemu_iovec_init_external(&local_qiov, &iov, 1); - - co->ret = vmdk_pwritev(co->bs, offset, bytes, &local_qiov, false, false); -} - -static int vmdk_write_compressed(BlockDriverState *bs, - int64_t sector_num, - const uint8_t *buf, - int nb_sectors) +static int coroutine_fn +vmdk_co_pwritev_compressed(BlockDriverState *bs, uint64_t offset, + uint64_t bytes, QEMUIOVector *qiov) { - BDRVVmdkState *s = bs->opaque; - - if (s->num_extents == 1 && s->extents[0].compressed) { - Coroutine *co; - AioContext *aio_context = bdrv_get_aio_context(bs); - VmdkWriteCompressedCo data = { - .bs = bs, - .sector_num = sector_num, - .buf = buf, - .nb_sectors = nb_sectors, - .ret = -EINPROGRESS, - }; - co = qemu_coroutine_create(vmdk_co_write_compressed, &data); - qemu_coroutine_enter(co); - while (data.ret == -EINPROGRESS) { - aio_poll(aio_context, true); - } - return data.ret; - } else { - return -ENOTSUP; - } + return vmdk_co_pwritev(bs, offset, bytes, qiov, 0); } static int coroutine_fn vmdk_co_pwrite_zeroes(BlockDriverState *bs, @@ -2393,7 +2348,7 @@ static BlockDriver bdrv_vmdk = { .bdrv_reopen_prepare = vmdk_reopen_prepare, .bdrv_co_preadv = vmdk_co_preadv, .bdrv_co_pwritev = vmdk_co_pwritev, - .bdrv_write_compressed = vmdk_write_compressed, + .bdrv_co_pwritev_compressed = vmdk_co_pwritev_compressed, .bdrv_co_pwrite_zeroes = vmdk_co_pwrite_zeroes, .bdrv_close = vmdk_close, .bdrv_create = vmdk_create,