From patchwork Wed May 13 09:50:41 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrey Shinkevich X-Patchwork-Id: 11545653 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A9AEB90 for ; Wed, 13 May 2020 10:02:26 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 8A5C120575 for ; Wed, 13 May 2020 10:02:26 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8A5C120575 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=virtuozzo.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:50266 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jYoDQ-0007CL-1V for patchwork-qemu-devel@patchwork.kernel.org; Wed, 13 May 2020 06:02:18 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:44724) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jYo31-0006lL-3d; Wed, 13 May 2020 05:51:31 -0400 Received: from relay.sw.ru ([185.231.240.75]:53986) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jYo2z-0003Z5-6N; Wed, 13 May 2020 05:51:30 -0400 Received: from dhcp-172-16-25-136.sw.ru ([172.16.25.136] helo=localhost.sw.ru) by relay.sw.ru with esmtp (Exim 4.92.3) (envelope-from ) id 1jYo2U-0001e4-4y; Wed, 13 May 2020 12:50:58 +0300 From: Andrey Shinkevich To: qemu-block@nongnu.org Subject: [PATCH v5 00/15] Apply COR-filter to the block-stream permanently Date: Wed, 13 May 2020 12:50:41 +0300 Message-Id: <1589363456-1035571-1-git-send-email-andrey.shinkevich@virtuozzo.com> X-Mailer: git-send-email 1.8.3.1 Received-SPF: pass client-ip=185.231.240.75; envelope-from=andrey.shinkevich@virtuozzo.com; helo=relay.sw.ru X-detected-operating-system: by eggs.gnu.org: First seen = 2020/05/13 05:51:06 X-ACL-Warn: Detected OS = Linux 3.1-3.10 X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, fam@euphon.net, vsementsov@virtuozzo.com, armbru@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com, andrey.shinkevich@virtuozzo.com, den@openvz.org, mreitz@redhat.com, jsnow@redhat.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" With this series, all the block-stream COR operations pass through the COR-filter. The patches 01-08/15 are taken from the series "block: Deal with filters" by Max Reitz, the full version of that can be found in the branches: https://git.xanclic.moe/XanClic/qemu child-access-functions-v6 https://github.com/XanClic/qemu child-access-functions-v6 When running iotests, apply "char-socket: Fix race condition" to avoid sporadic segmentation faults. v5: 01: Included forgotten file block/copy-on-read.h v4: 01: Initialization of the COR-filter BDRVStateCOR member. v3: 01: The COR filter insert/remove functions moved to block/copy-on-read.c to be a part of API. 02: block/stream.c code refactoring. 03: The separate call to block_job_add_bdrv() is used to block operations on the active node after the filter inserted and the job created. 04: The iotests case 030::test_overlapping_4 was modified to unbound the block-stream job from the base node. 05: The COR driver functions preadv/pwritev replaced with their analogous preadv/pwritev_part. v2: 01: No more skipping filters while checking for operation blockers. However, we exclude filters between the bottom node and base because we do not set the operation blockers for filters anymore. 02: As stated above, we do not set the operation blockers for filters anymore. So, skip filters when we block operations for the target node. 03: The comment added for the patch 4/7. 04: The QAPI target version changed to 5.1. 05: The 'filter-node-name' now excluded from using in the test #030. If we need it no more in a final version of the series, the patch 5/7 may be removed. 06: The COR-filter included into the frozen chain of a block-stream job. The 'above_base' node pointer is left because it is essential for finding the base node in case of filters above. Andrey Shinkevich (7): block: prepare block-stream for using COR-filter copy-on-read: Support change filename functions copy-on-read: Support preadv/pwritev_part functions copy-on-read: add filter append/drop functions qapi: add filter-node-name to block-stream iotests: prepare 245 for using filter in block-stream block: apply COR-filter to block-stream jobs Max Reitz (8): block: Mark commit and mirror as filter drivers copy-on-read: Support compressed writes block: Add child access functions block: Add chain helper functions block: Include filters when freezing backing chain block: Use CAFs in block status functions commit: Deal with filters when blocking intermediate nodes block: Use CAFs when working with backing chains block.c | 275 ++++++++++++++++++++++++++++++++++------- block/commit.c | 85 ++++++++++--- block/copy-on-read.c | 159 ++++++++++++++++++++++-- block/copy-on-read.h | 36 ++++++ block/io.c | 19 +-- block/mirror.c | 6 +- block/monitor/block-hmp-cmds.c | 4 +- block/stream.c | 89 +++++++++---- blockdev.c | 19 ++- include/block/block.h | 6 +- include/block/block_int.h | 67 +++++++++- qapi/block-core.json | 6 + tests/qemu-iotests/030 | 17 +-- tests/qemu-iotests/141.out | 2 +- tests/qemu-iotests/245 | 10 +- 15 files changed, 661 insertions(+), 139 deletions(-) create mode 100644 block/copy-on-read.h