From patchwork Mon Sep 5 18:13:31 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 9314991 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 B268A600CA for ; Mon, 5 Sep 2016 18:19:58 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A62AE27D45 for ; Mon, 5 Sep 2016 18:19:58 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 998C127F9C; Mon, 5 Sep 2016 18:19:58 +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 2C32D27D45 for ; Mon, 5 Sep 2016 18:19:58 +0000 (UTC) Received: from localhost ([::1]:56143 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bgyUu-00072a-O4 for patchwork-qemu-devel@patchwork.kernel.org; Mon, 05 Sep 2016 14:19:56 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:38084) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bgyPa-0002pW-Qw for qemu-devel@nongnu.org; Mon, 05 Sep 2016 14:14:28 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bgyPY-0000uC-LF for qemu-devel@nongnu.org; Mon, 05 Sep 2016 14:14:25 -0400 Received: from mx1.redhat.com ([209.132.183.28]:36340) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bgyPV-0000t0-Oq; Mon, 05 Sep 2016 14:14:21 -0400 Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 564AF80084; Mon, 5 Sep 2016 18:14:21 +0000 (UTC) Received: from noname.redhat.com (ovpn-116-62.ams2.redhat.com [10.36.116.62]) by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u85IDt7h020627; Mon, 5 Sep 2016 14:14:20 -0400 From: Kevin Wolf To: qemu-block@nongnu.org Date: Mon, 5 Sep 2016 20:13:31 +0200 Message-Id: <1473099234-10882-20-git-send-email-kwolf@redhat.com> In-Reply-To: <1473099234-10882-1-git-send-email-kwolf@redhat.com> References: <1473099234-10882-1-git-send-email-kwolf@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.28]); Mon, 05 Sep 2016 18:14:21 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 19/42] 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: kwolf@redhat.com, qemu-devel@nongnu.org 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 Signed-off-by: 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,