From patchwork Tue Aug 18 21:24:40 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrey Shinkevich X-Patchwork-Id: 11722203 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 A48A9109B for ; Tue, 18 Aug 2020 21:25:43 +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 3647B2075E for ; Tue, 18 Aug 2020 21:25:43 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3647B2075E 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]:52144 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1k8970-0007Kz-3U for patchwork-qemu-devel@patchwork.kernel.org; Tue, 18 Aug 2020 17:25:42 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:41910) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1k8968-0005r8-G9; Tue, 18 Aug 2020 17:24:48 -0400 Received: from relay.sw.ru ([185.231.240.75]:41584 helo=relay3.sw.ru) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1k8965-0003ca-2i; Tue, 18 Aug 2020 17:24:48 -0400 Received: from [172.16.25.136] (helo=localhost.sw.ru) by relay3.sw.ru with esmtp (Exim 4.94) (envelope-from ) id 1k895p-000GtS-PL; Wed, 19 Aug 2020 00:24:29 +0300 From: Andrey Shinkevich To: qemu-block@nongnu.org Subject: [PATCH v6 4/4] block: apply COR-filter to block-stream jobs Date: Wed, 19 Aug 2020 00:24:40 +0300 Message-Id: <1597785880-431103-5-git-send-email-andrey.shinkevich@virtuozzo.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1597785880-431103-1-git-send-email-andrey.shinkevich@virtuozzo.com> References: <1597785880-431103-1-git-send-email-andrey.shinkevich@virtuozzo.com> Received-SPF: pass client-ip=185.231.240.75; envelope-from=andrey.shinkevich@virtuozzo.com; helo=relay3.sw.ru X-detected-operating-system: by eggs.gnu.org: First seen = 2020/08/18 17:24:42 X-ACL-Warn: Detected OS = Linux 3.11 and newer 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_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no 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, vsementsov@virtuozzo.com, armbru@redhat.com, qemu-devel@nongnu.org, 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" The patch completes the series with the COR-filter insertion to any block-stream operation. It also makes changes to the iotests 030. The test case 'test_stream_parallel' was deleted due to multiple errors. Signed-off-by: Andrey Shinkevich --- block/stream.c | 76 ++++++++++++++++++++++++++++++++-------------- tests/qemu-iotests/030 | 50 +++--------------------------- tests/qemu-iotests/030.out | 4 +-- 3 files changed, 61 insertions(+), 69 deletions(-) diff --git a/block/stream.c b/block/stream.c index 8bf6b6d..0b11979 100644 --- a/block/stream.c +++ b/block/stream.c @@ -19,6 +19,7 @@ #include "qapi/qmp/qerror.h" #include "qemu/ratelimit.h" #include "sysemu/block-backend.h" +#include "block/copy-on-read.h" enum { /* @@ -33,8 +34,11 @@ typedef struct StreamBlockJob { BlockJob common; BlockDriverState *base_overlay; /* COW overlay (stream from this) */ BlockDriverState *above_base; /* Node directly above the base */ + BlockDriverState *cor_filter_bs; + BlockDriverState *target_bs; BlockdevOnError on_error; char *backing_file_str; + char *base_fmt; bool bs_read_only; bool chain_frozen; } StreamBlockJob; @@ -53,34 +57,26 @@ static void stream_abort(Job *job) StreamBlockJob *s = container_of(job, StreamBlockJob, common.job); if (s->chain_frozen) { - BlockJob *bjob = &s->common; - bdrv_unfreeze_backing_chain(blk_bs(bjob->blk), s->above_base); + bdrv_unfreeze_backing_chain(s->cor_filter_bs, s->above_base); } } static int stream_prepare(Job *job) { StreamBlockJob *s = container_of(job, StreamBlockJob, common.job); - BlockJob *bjob = &s->common; - BlockDriverState *bs = blk_bs(bjob->blk); + BlockDriverState *bs = s->target_bs; BlockDriverState *unfiltered_bs = bdrv_skip_filters(bs); BlockDriverState *base = bdrv_filter_or_cow_bs(s->above_base); Error *local_err = NULL; int ret = 0; - bdrv_unfreeze_backing_chain(bs, s->above_base); + bdrv_unfreeze_backing_chain(s->cor_filter_bs, s->above_base); s->chain_frozen = false; if (bdrv_cow_child(unfiltered_bs)) { - const char *base_id = NULL, *base_fmt = NULL; - if (base) { - base_id = s->backing_file_str; - if (base->drv) { - base_fmt = base->drv->format_name; - } - } bdrv_set_backing_hd(unfiltered_bs, base, &local_err); - ret = bdrv_change_backing_file(unfiltered_bs, base_id, base_fmt); + ret = bdrv_change_backing_file(unfiltered_bs, s->backing_file_str, + s->base_fmt); if (local_err) { error_report_err(local_err); return -EPERM; @@ -94,7 +90,9 @@ static void stream_clean(Job *job) { StreamBlockJob *s = container_of(job, StreamBlockJob, common.job); BlockJob *bjob = &s->common; - BlockDriverState *bs = blk_bs(bjob->blk); + BlockDriverState *bs = s->target_bs; + + bdrv_cor_filter_drop(s->cor_filter_bs); /* Reopen the image back in read-only mode if necessary */ if (s->bs_read_only) { @@ -104,13 +102,14 @@ static void stream_clean(Job *job) } g_free(s->backing_file_str); + g_free(s->base_fmt); } static int coroutine_fn stream_run(Job *job, Error **errp) { StreamBlockJob *s = container_of(job, StreamBlockJob, common.job); BlockBackend *blk = s->common.blk; - BlockDriverState *bs = blk_bs(blk); + BlockDriverState *bs = s->target_bs; BlockDriverState *unfiltered_bs = bdrv_skip_filters(bs); bool enable_cor = !bdrv_cow_child(s->base_overlay); int64_t len; @@ -231,6 +230,12 @@ void stream_start(const char *job_id, BlockDriverState *bs, int basic_flags = BLK_PERM_CONSISTENT_READ | BLK_PERM_WRITE_UNCHANGED; BlockDriverState *base_overlay = bdrv_find_overlay(bs, base); BlockDriverState *above_base; + BlockDriverState *cor_filter_bs = NULL; + char *base_fmt = NULL; + + if (base && base->drv) { + base_fmt = g_strdup(base->drv->format_name); + } if (!base_overlay) { error_setg(errp, "'%s' is not in the backing chain of '%s'", @@ -264,17 +269,36 @@ void stream_start(const char *job_id, BlockDriverState *bs, } } - /* Prevent concurrent jobs trying to modify the graph structure here, we - * already have our own plans. Also don't allow resize as the image size is - * queried only at the job start and then cached. */ - s = block_job_create(job_id, &stream_job_driver, NULL, bs, - basic_flags | BLK_PERM_GRAPH_MOD, - basic_flags | BLK_PERM_WRITE, + cor_filter_bs = bdrv_cor_filter_append(bs, filter_node_name, errp); + if (cor_filter_bs == NULL) { + goto fail; + } + + if (bdrv_freeze_backing_chain(cor_filter_bs, bs, errp) < 0) { + bdrv_cor_filter_drop(cor_filter_bs); + cor_filter_bs = NULL; + goto fail; + } + + s = block_job_create(job_id, &stream_job_driver, NULL, cor_filter_bs, + BLK_PERM_CONSISTENT_READ, + basic_flags | BLK_PERM_WRITE | BLK_PERM_GRAPH_MOD, speed, creation_flags, NULL, NULL, errp); if (!s) { goto fail; } + /* + * Prevent concurrent jobs trying to modify the graph structure here, we + * already have our own plans. Also don't allow resize as the image size is + * queried only at the job start and then cached. + */ + if (block_job_add_bdrv(&s->common, "active node", bs, + basic_flags | BLK_PERM_GRAPH_MOD, + basic_flags | BLK_PERM_WRITE, &error_abort)) { + goto fail; + } + /* Block all intermediate nodes between bs and base, because they will * disappear from the chain after this operation. The streaming job reads * every block only once, assuming that it doesn't change, so forbid writes @@ -294,6 +318,9 @@ void stream_start(const char *job_id, BlockDriverState *bs, s->base_overlay = base_overlay; s->above_base = above_base; + s->cor_filter_bs = cor_filter_bs; + s->target_bs = bs; + s->base_fmt = base_fmt; s->backing_file_str = g_strdup(backing_file_str); s->bs_read_only = bs_read_only; s->chain_frozen = true; @@ -307,5 +334,10 @@ fail: if (bs_read_only) { bdrv_reopen_set_read_only(bs, true, NULL); } - bdrv_unfreeze_backing_chain(bs, above_base); + if (cor_filter_bs) { + bdrv_unfreeze_backing_chain(cor_filter_bs, above_base); + bdrv_cor_filter_drop(cor_filter_bs); + } else { + bdrv_unfreeze_backing_chain(bs, above_base); + } } diff --git a/tests/qemu-iotests/030 b/tests/qemu-iotests/030 index 1cdd7e2..fec9d89 100755 --- a/tests/qemu-iotests/030 +++ b/tests/qemu-iotests/030 @@ -221,60 +221,20 @@ class TestParallelOps(iotests.QMPTestCase): for img in self.imgs: os.remove(img) - # Test that it's possible to run several block-stream operations - # in parallel in the same snapshot chain - def test_stream_parallel(self): - self.assert_no_active_block_jobs() - - # Check that the maps don't match before the streaming operations - for i in range(2, self.num_imgs, 2): - self.assertNotEqual(qemu_io('-f', iotests.imgfmt, '-rU', '-c', 'map', self.imgs[i]), - qemu_io('-f', iotests.imgfmt, '-rU', '-c', 'map', self.imgs[i-1]), - 'image file map matches backing file before streaming') - - # Create all streaming jobs - pending_jobs = [] - for i in range(2, self.num_imgs, 2): - node_name = 'node%d' % i - job_id = 'stream-%s' % node_name - pending_jobs.append(job_id) - result = self.vm.qmp('block-stream', device=node_name, job_id=job_id, base=self.imgs[i-2], speed=512*1024) - self.assert_qmp(result, 'return', {}) - - for job in pending_jobs: - result = self.vm.qmp('block-job-set-speed', device=job, speed=0) - self.assert_qmp(result, 'return', {}) - - # Wait for all jobs to be finished. - while len(pending_jobs) > 0: - for event in self.vm.get_qmp_events(wait=True): - if event['event'] == 'BLOCK_JOB_COMPLETED': - job_id = self.dictpath(event, 'data/device') - self.assertTrue(job_id in pending_jobs) - self.assert_qmp_absent(event, 'data/error') - pending_jobs.remove(job_id) - - self.assert_no_active_block_jobs() - self.vm.shutdown() - - # Check that all maps match now - for i in range(2, self.num_imgs, 2): - self.assertEqual(qemu_io('-f', iotests.imgfmt, '-c', 'map', self.imgs[i]), - qemu_io('-f', iotests.imgfmt, '-c', 'map', self.imgs[i-1]), - 'image file map does not match backing file after streaming') - # Test that it's not possible to perform two block-stream # operations if there are nodes involved in both. def test_overlapping_1(self): self.assert_no_active_block_jobs() # Set a speed limit to make sure that this job blocks the rest - result = self.vm.qmp('block-stream', device='node4', job_id='stream-node4', base=self.imgs[1], speed=1024*1024) + result = self.vm.qmp('block-stream', device='node4', + job_id='stream-node4', base=self.imgs[1], + filter_node_name='stream-filter', speed=1024*1024) self.assert_qmp(result, 'return', {}) result = self.vm.qmp('block-stream', device='node5', job_id='stream-node5', base=self.imgs[2]) self.assert_qmp(result, 'error/desc', - "Node 'node4' is busy: block device is in use by block job: stream") + "Node 'stream-filter' is busy: block device is in use by block job: stream") result = self.vm.qmp('block-stream', device='node3', job_id='stream-node3', base=self.imgs[2]) self.assert_qmp(result, 'error/desc', @@ -287,7 +247,7 @@ class TestParallelOps(iotests.QMPTestCase): # block-commit should also fail if it touches nodes used by the stream job result = self.vm.qmp('block-commit', device='drive0', base=self.imgs[4], job_id='commit-node4') self.assert_qmp(result, 'error/desc', - "Node 'node4' is busy: block device is in use by block job: stream") + "Node 'stream-filter' is busy: block device is in use by block job: stream") result = self.vm.qmp('block-commit', device='drive0', base=self.imgs[1], top=self.imgs[3], job_id='commit-node1') self.assert_qmp(result, 'error/desc', diff --git a/tests/qemu-iotests/030.out b/tests/qemu-iotests/030.out index 6d9bee1..5eb508d 100644 --- a/tests/qemu-iotests/030.out +++ b/tests/qemu-iotests/030.out @@ -1,5 +1,5 @@ -........................... +.......................... ---------------------------------------------------------------------- -Ran 27 tests +Ran 26 tests OK