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Sun, 01 Sep 2024 16:25:21 +0200 (CEST) X-Kuleuven: This mail passed the K.U.Leuven mailcluster From: Vincent Vanlaer To: qemu-devel@nongnu.org Cc: John Snow , Vladimir Sementsov-Ogievskiy , Kevin Wolf , qemu-block@nongnu.org, Hanna Reitz , Vincent Vanlaer Subject: [PATCH v3 2/5] block: move commit_run loop to separate function Date: Sun, 1 Sep 2024 16:24:02 +0200 Message-ID: <20240901142405.3183874-3-libvirt-e6954efa@volkihar.be> X-Mailer: git-send-email 2.44.1 In-Reply-To: <20240901142405.3183874-1-libvirt-e6954efa@volkihar.be> References: <20240901142405.3183874-1-libvirt-e6954efa@volkihar.be> MIME-Version: 1.0 Received-SPF: pass client-ip=134.58.240.134; envelope-from=libvirt-e6954efa@volkihar.be; helo=icts-p-cavuit-4.kulnet.kuleuven.be 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_PASS=-0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Signed-off-by: Vincent Vanlaer Reviewed-by: Vladimir Sementsov-Ogievskiy --- block/commit.c | 85 ++++++++++++++++++++++++++++---------------------- 1 file changed, 48 insertions(+), 37 deletions(-) diff --git a/block/commit.c b/block/commit.c index 8dee25b313..9eedd1fa47 100644 --- a/block/commit.c +++ b/block/commit.c @@ -128,6 +128,51 @@ static void commit_clean(Job *job) blk_unref(s->top); } +static int commit_iteration(CommitBlockJob *s, int64_t offset, int64_t *n, void *buf) { + int ret = 0; + bool copy; + bool error_in_source = true; + + /* Copy if allocated above the base */ + WITH_GRAPH_RDLOCK_GUARD() { + ret = bdrv_co_common_block_status_above(blk_bs(s->top), + s->base_overlay, true, true, offset, COMMIT_BUFFER_SIZE, + n, NULL, NULL, NULL); + } + + copy = (ret >= 0 && ret & BDRV_BLOCK_ALLOCATED); + trace_commit_one_iteration(s, offset, *n, ret); + if (copy) { + assert(*n < SIZE_MAX); + + ret = blk_co_pread(s->top, offset, *n, buf, 0); + if (ret >= 0) { + ret = blk_co_pwrite(s->base, offset, *n, buf, 0); + if (ret < 0) { + error_in_source = false; + } + } + } + if (ret < 0) { + BlockErrorAction action = block_job_error_action(&s->common, s->on_error, + error_in_source, -ret); + if (action == BLOCK_ERROR_ACTION_REPORT) { + return ret; + } else { + *n = 0; + return 0; + } + } + /* Publish progress */ + job_progress_update(&s->common.job, *n); + + if (copy) { + block_job_ratelimit_processed_bytes(&s->common, *n); + } + + return 0; +} + static int coroutine_fn commit_run(Job *job, Error **errp) { CommitBlockJob *s = container_of(job, CommitBlockJob, common.job); @@ -158,9 +203,6 @@ static int coroutine_fn commit_run(Job *job, Error **errp) buf = blk_blockalign(s->top, COMMIT_BUFFER_SIZE); for (offset = 0; offset < len; offset += n) { - bool copy; - bool error_in_source = true; - /* Note that even when no rate limit is applied we need to yield * with no pending I/O here so that bdrv_drain_all() returns. */ @@ -168,42 +210,11 @@ static int coroutine_fn commit_run(Job *job, Error **errp) if (job_is_cancelled(&s->common.job)) { break; } - /* Copy if allocated above the base */ - WITH_GRAPH_RDLOCK_GUARD() { - ret = bdrv_co_common_block_status_above(blk_bs(s->top), - s->base_overlay, true, true, offset, COMMIT_BUFFER_SIZE, - &n, NULL, NULL, NULL); - } - copy = (ret >= 0 && ret & BDRV_BLOCK_ALLOCATED); - trace_commit_one_iteration(s, offset, n, ret); - if (copy) { - assert(n < SIZE_MAX); - - ret = blk_co_pread(s->top, offset, n, buf, 0); - if (ret >= 0) { - ret = blk_co_pwrite(s->base, offset, n, buf, 0); - if (ret < 0) { - error_in_source = false; - } - } - } - if (ret < 0) { - BlockErrorAction action = - block_job_error_action(&s->common, s->on_error, - error_in_source, -ret); - if (action == BLOCK_ERROR_ACTION_REPORT) { - return ret; - } else { - n = 0; - continue; - } - } - /* Publish progress */ - job_progress_update(&s->common.job, n); + ret = commit_iteration(s, offset, &n, buf); - if (copy) { - block_job_ratelimit_processed_bytes(&s->common, n); + if (ret < 0) { + return ret; } }