From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on dcvr.yhbt.net X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=AWL,BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI, SPF_HELO_PASS,SPF_PASS shortcircuit=no autolearn=ham autolearn_force=no version=3.4.2 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by dcvr.yhbt.net (Postfix) with ESMTP id 4FC171FA01 for ; Thu, 18 Feb 2021 16:57:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233969AbhBRQx0 (ORCPT ); Thu, 18 Feb 2021 11:53:26 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41412 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232842AbhBROKo (ORCPT ); Thu, 18 Feb 2021 09:10:44 -0500 Received: from mail-wm1-x330.google.com (mail-wm1-x330.google.com [IPv6:2a00:1450:4864:20::330]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9E07FC06121D for ; Thu, 18 Feb 2021 06:07:56 -0800 (PST) Received: by mail-wm1-x330.google.com with SMTP id n10so4085354wmq.0 for ; Thu, 18 Feb 2021 06:07:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=message-id:in-reply-to:references:from:date:subject:fcc :content-transfer-encoding:mime-version:to:cc; bh=vzmS8yzoSmi05koRWtYpOHFxzzJ97VIl5onOob4HIG8=; b=oTt7/7fqFkLr6R3w9lNgVmOxDFXEm3LovTIHeKIsmZ3Jgmtb2/QoH1XlYIdnB9Zoil 8FwqepURG9jCpFP44XpSzmYiYoXcEu4YbmgmzrfZvC4nTwR//jimvy0qK/4Mk3r0HZ19 ykbHIBfKuKu/g77kqcTUN45Mc+qireQx+p7s4VSzUS+fMsGv0ESnKh5lsoiRngHQ9ALW /t3dgon4bJDKlhACDShg8rTgKMPnbMIJCbnFl7EKd3n4MR8rNe1ezbnesd/5KUbRy3o2 67PsIFAOojOW0qeDD+HutLiOv6mbUup5ZttvR1hJAtgqO4KITxbyey+LbIjcAvlSMbIa ssEw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:message-id:in-reply-to:references:from:date :subject:fcc:content-transfer-encoding:mime-version:to:cc; bh=vzmS8yzoSmi05koRWtYpOHFxzzJ97VIl5onOob4HIG8=; b=lC6QkAcZJw92B3cIv2wGziy9Isx29W0KzWbidaO8RzbDxMzw5vyfWydFulmEGwY7uT hpKc4lQvfiR7jK0O/Y+9llvqtyHUonAH96Ol6ABoWhUVndnHn5+1oCkyJgyisqlzhNcD +BR2uOBLtMB/4s8EqsC/K7WVWf1wbQF5ah7os/qc/pFnOPGS6RQXrcwTnQ0kbV7tkkyU q8FH46mh9X6pr7rFP57sCT94jIMTRkZ18wCwx30fW8D8u+qz4Lum0f1HrOWEAtFA4Bbm ek2NOYw+Qny0SJs5uC04YhscngF1kqVvcO//knS6jsUsc9wrOLSFZB5Ouvhl6pdNZWWs gIyg== X-Gm-Message-State: AOAM531146Op2ypj6qu2jUA8+UoDow//9wC195LQGdlGqvuebhvwENId v1PHb3LTAlVBDKrAuv23Ndkgbz7Ennc= X-Google-Smtp-Source: ABdhPJwxZsMNHXHJ6COoWtzC9qomKiH5Iyhgjrr6LpCzHFRP/PHDKmooC0Ats14MRb+UeK7HQwYY+w== X-Received: by 2002:a1c:7301:: with SMTP id d1mr3766857wmb.33.1613657275307; Thu, 18 Feb 2021 06:07:55 -0800 (PST) Received: from [127.0.0.1] ([13.74.141.28]) by smtp.gmail.com with ESMTPSA id r7sm7582451wmh.38.2021.02.18.06.07.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 18 Feb 2021 06:07:54 -0800 (PST) Message-Id: <87f441fc5e154c95494f3f1219fb0e0c7d9b3244.1613657259.git.gitgitgadget@gmail.com> In-Reply-To: References: From: "Derrick Stolee via GitGitGadget" Date: Thu, 18 Feb 2021 14:07:35 +0000 Subject: [PATCH v4 13/17] commit-graph: use chunk-format read API Fcc: Sent Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit MIME-Version: 1.0 To: git@vger.kernel.org Cc: me@ttaylorr.com, gitster@pobox.com, l.s.r@web.de, szeder.dev@gmail.com, Chris Torek , Derrick Stolee , Derrick Stolee , Derrick Stolee Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org From: Derrick Stolee Instead of parsing the table of contents directly, use the chunk-format API methods read_table_of_contents() and pair_chunk(). While the current implementation loses the duplicate-chunk detection, that will be added in a future change. Signed-off-by: Derrick Stolee --- commit-graph.c | 159 ++++++++++++++-------------------------- t/t5318-commit-graph.sh | 2 +- 2 files changed, 55 insertions(+), 106 deletions(-) diff --git a/commit-graph.c b/commit-graph.c index a889130cc849..76514a879e88 100644 --- a/commit-graph.c +++ b/commit-graph.c @@ -59,8 +59,7 @@ void git_test_write_commit_graph_or_die(void) #define GRAPH_HEADER_SIZE 8 #define GRAPH_FANOUT_SIZE (4 * 256) -#define GRAPH_CHUNKLOOKUP_WIDTH 12 -#define GRAPH_MIN_SIZE (GRAPH_HEADER_SIZE + 4 * GRAPH_CHUNKLOOKUP_WIDTH \ +#define GRAPH_MIN_SIZE (GRAPH_HEADER_SIZE + 4 * CHUNK_TOC_ENTRY_SIZE \ + GRAPH_FANOUT_SIZE + the_hash_algo->rawsz) #define CORRECTED_COMMIT_DATE_OFFSET_OVERFLOW (1ULL << 31) @@ -298,15 +297,43 @@ static int verify_commit_graph_lite(struct commit_graph *g) return 0; } +static int graph_read_oid_lookup(const unsigned char *chunk_start, + size_t chunk_size, void *data) +{ + struct commit_graph *g = data; + g->chunk_oid_lookup = chunk_start; + g->num_commits = chunk_size / g->hash_len; + return 0; +} + +static int graph_read_bloom_data(const unsigned char *chunk_start, + size_t chunk_size, void *data) +{ + struct commit_graph *g = data; + uint32_t hash_version; + g->chunk_bloom_data = chunk_start; + hash_version = get_be32(chunk_start); + + if (hash_version != 1) + return 0; + + g->bloom_filter_settings = xmalloc(sizeof(struct bloom_filter_settings)); + g->bloom_filter_settings->hash_version = hash_version; + g->bloom_filter_settings->num_hashes = get_be32(chunk_start + 4); + g->bloom_filter_settings->bits_per_entry = get_be32(chunk_start + 8); + g->bloom_filter_settings->max_changed_paths = DEFAULT_BLOOM_MAX_CHANGES; + + return 0; +} + struct commit_graph *parse_commit_graph(struct repository *r, void *graph_map, size_t graph_size) { - const unsigned char *data, *chunk_lookup; - uint32_t i; + const unsigned char *data; struct commit_graph *graph; - uint64_t next_chunk_offset; uint32_t graph_signature; unsigned char graph_version, hash_version; + struct chunkfile *cf = NULL; if (!graph_map) return NULL; @@ -347,7 +374,7 @@ struct commit_graph *parse_commit_graph(struct repository *r, graph->data_len = graph_size; if (graph_size < GRAPH_HEADER_SIZE + - (graph->num_chunks + 1) * GRAPH_CHUNKLOOKUP_WIDTH + + (graph->num_chunks + 1) * CHUNK_TOC_ENTRY_SIZE + GRAPH_FANOUT_SIZE + the_hash_algo->rawsz) { error(_("commit-graph file is too small to hold %u chunks"), graph->num_chunks); @@ -355,108 +382,28 @@ struct commit_graph *parse_commit_graph(struct repository *r, return NULL; } - chunk_lookup = data + 8; - next_chunk_offset = get_be64(chunk_lookup + 4); - for (i = 0; i < graph->num_chunks; i++) { - uint32_t chunk_id; - uint64_t chunk_offset = next_chunk_offset; - int chunk_repeated = 0; - - chunk_id = get_be32(chunk_lookup + 0); - - chunk_lookup += GRAPH_CHUNKLOOKUP_WIDTH; - next_chunk_offset = get_be64(chunk_lookup + 4); - - if (chunk_offset > graph_size - the_hash_algo->rawsz) { - error(_("commit-graph improper chunk offset %08x%08x"), (uint32_t)(chunk_offset >> 32), - (uint32_t)chunk_offset); - goto free_and_return; - } - - switch (chunk_id) { - case GRAPH_CHUNKID_OIDFANOUT: - if (graph->chunk_oid_fanout) - chunk_repeated = 1; - else - graph->chunk_oid_fanout = (uint32_t*)(data + chunk_offset); - break; - - case GRAPH_CHUNKID_OIDLOOKUP: - if (graph->chunk_oid_lookup) - chunk_repeated = 1; - else { - graph->chunk_oid_lookup = data + chunk_offset; - graph->num_commits = (next_chunk_offset - chunk_offset) - / graph->hash_len; - } - break; + cf = init_chunkfile(NULL); - case GRAPH_CHUNKID_DATA: - if (graph->chunk_commit_data) - chunk_repeated = 1; - else - graph->chunk_commit_data = data + chunk_offset; - break; - - case GRAPH_CHUNKID_GENERATION_DATA: - if (graph->chunk_generation_data) - chunk_repeated = 1; - else - graph->chunk_generation_data = data + chunk_offset; - break; - - case GRAPH_CHUNKID_GENERATION_DATA_OVERFLOW: - if (graph->chunk_generation_data_overflow) - chunk_repeated = 1; - else - graph->chunk_generation_data_overflow = data + chunk_offset; - break; - - case GRAPH_CHUNKID_EXTRAEDGES: - if (graph->chunk_extra_edges) - chunk_repeated = 1; - else - graph->chunk_extra_edges = data + chunk_offset; - break; - - case GRAPH_CHUNKID_BASE: - if (graph->chunk_base_graphs) - chunk_repeated = 1; - else - graph->chunk_base_graphs = data + chunk_offset; - break; - - case GRAPH_CHUNKID_BLOOMINDEXES: - if (graph->chunk_bloom_indexes) - chunk_repeated = 1; - else if (r->settings.commit_graph_read_changed_paths) - graph->chunk_bloom_indexes = data + chunk_offset; - break; - - case GRAPH_CHUNKID_BLOOMDATA: - if (graph->chunk_bloom_data) - chunk_repeated = 1; - else if (r->settings.commit_graph_read_changed_paths) { - uint32_t hash_version; - graph->chunk_bloom_data = data + chunk_offset; - hash_version = get_be32(data + chunk_offset); - - if (hash_version != 1) - break; + if (read_table_of_contents(cf, graph->data, graph_size, + GRAPH_HEADER_SIZE, graph->num_chunks)) + goto free_and_return; - graph->bloom_filter_settings = xmalloc(sizeof(struct bloom_filter_settings)); - graph->bloom_filter_settings->hash_version = hash_version; - graph->bloom_filter_settings->num_hashes = get_be32(data + chunk_offset + 4); - graph->bloom_filter_settings->bits_per_entry = get_be32(data + chunk_offset + 8); - graph->bloom_filter_settings->max_changed_paths = DEFAULT_BLOOM_MAX_CHANGES; - } - break; - } + pair_chunk(cf, GRAPH_CHUNKID_OIDFANOUT, + (const unsigned char **)&graph->chunk_oid_fanout); + read_chunk(cf, GRAPH_CHUNKID_OIDLOOKUP, graph_read_oid_lookup, graph); + pair_chunk(cf, GRAPH_CHUNKID_DATA, &graph->chunk_commit_data); + pair_chunk(cf, GRAPH_CHUNKID_EXTRAEDGES, &graph->chunk_extra_edges); + pair_chunk(cf, GRAPH_CHUNKID_BASE, &graph->chunk_base_graphs); + pair_chunk(cf, GRAPH_CHUNKID_GENERATION_DATA, + &graph->chunk_generation_data); + pair_chunk(cf, GRAPH_CHUNKID_GENERATION_DATA_OVERFLOW, + &graph->chunk_generation_data_overflow); - if (chunk_repeated) { - error(_("commit-graph chunk id %08x appears multiple times"), chunk_id); - goto free_and_return; - } + if (r->settings.commit_graph_read_changed_paths) { + pair_chunk(cf, GRAPH_CHUNKID_BLOOMINDEXES, + &graph->chunk_bloom_indexes); + read_chunk(cf, GRAPH_CHUNKID_BLOOMDATA, + graph_read_bloom_data, graph); } if (graph->chunk_bloom_indexes && graph->chunk_bloom_data) { @@ -473,9 +420,11 @@ struct commit_graph *parse_commit_graph(struct repository *r, if (verify_commit_graph_lite(graph)) goto free_and_return; + free_chunkfile(cf); return graph; free_and_return: + free_chunkfile(cf); free(graph->bloom_filter_settings); free(graph); return NULL; diff --git a/t/t5318-commit-graph.sh b/t/t5318-commit-graph.sh index fa27df579a57..c7da741284e5 100755 --- a/t/t5318-commit-graph.sh +++ b/t/t5318-commit-graph.sh @@ -564,7 +564,7 @@ test_expect_success 'detect bad hash version' ' test_expect_success 'detect low chunk count' ' corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\01" \ - "missing the .* chunk" + "final chunk has non-zero id" ' test_expect_success 'detect missing OID fanout chunk' ' -- gitgitgadget