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Sat, 26 Oct 2024 18:30:37 +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 v4 3/5] block: refactor error handling of commit_iteration Date: Sat, 26 Oct 2024 18:30:07 +0200 Message-ID: <20241026163010.2865002-4-libvirt-e6954efa@volkihar.be> X-Mailer: git-send-email 2.44.1 In-Reply-To: <20241026163010.2865002-1-libvirt-e6954efa@volkihar.be> References: <20241026163010.2865002-1-libvirt-e6954efa@volkihar.be> MIME-Version: 1.0 Received-SPF: pass client-ip=2a02:2c40:0:c0::25:133; envelope-from=libvirt-e6954efa@volkihar.be; helo=icts-p-cavuit-3.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 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 --- block/commit.c | 61 ++++++++++++++++++++++++++++---------------------- 1 file changed, 34 insertions(+), 27 deletions(-) diff --git a/block/commit.c b/block/commit.c index 078e54f51f..5c24c8b80a 100644 --- a/block/commit.c +++ b/block/commit.c @@ -129,51 +129,58 @@ static void commit_clean(Job *job) } static int commit_iteration(CommitBlockJob *s, int64_t offset, - int64_t *n, void *buf) + int64_t *requested_bytes, void *buf) { + int64_t bytes = *requested_bytes; 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); + &bytes, NULL, NULL, NULL); } - copy = (ret >= 0 && ret & BDRV_BLOCK_ALLOCATED); - trace_commit_one_iteration(s, offset, *n, ret); - if (copy) { - assert(*n < SIZE_MAX); + trace_commit_one_iteration(s, offset, bytes, ret); - 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; + goto fail; + } + + if (ret & BDRV_BLOCK_ALLOCATED) { + assert(bytes < SIZE_MAX); + + ret = blk_co_pread(s->top, offset, bytes, buf, 0); + if (ret < 0) { + goto fail; } + + ret = blk_co_pwrite(s->base, offset, bytes, buf, 0); + if (ret < 0) { + error_in_source = false; + goto fail; + } + + block_job_ratelimit_processed_bytes(&s->common, bytes); } + /* Publish progress */ - job_progress_update(&s->common.job, *n); - if (copy) { - block_job_ratelimit_processed_bytes(&s->common, *n); + job_progress_update(&s->common.job, bytes); + + *requested_bytes = bytes; + + return 0; +fail:; + BlockErrorAction action = block_job_error_action(&s->common, s->on_error, + error_in_source, -ret); + if (action == BLOCK_ERROR_ACTION_REPORT) { + return ret; } + *requested_bytes = 0; + return 0; }