From patchwork Wed Aug 30 16:43:46 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan Tan X-Patchwork-Id: 13370373 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EEE44C83F25 for ; Wed, 30 Aug 2023 18:29:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231131AbjH3S3V (ORCPT ); Wed, 30 Aug 2023 14:29:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39138 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1343747AbjH3QoN (ORCPT ); Wed, 30 Aug 2023 12:44:13 -0400 Received: from mail-yw1-x1149.google.com (mail-yw1-x1149.google.com [IPv6:2607:f8b0:4864:20::1149]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 14C121A4 for ; Wed, 30 Aug 2023 09:44:11 -0700 (PDT) Received: by mail-yw1-x1149.google.com with SMTP id 00721157ae682-58c8cbf0a0dso18655637b3.1 for ; Wed, 30 Aug 2023 09:44:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1693413850; x=1694018650; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=a11gaofxrwFqbqRH+84gjUe3pKqOaKVtS0Dgj0k1MQI=; b=s/iMLwG5KsmkixRVn2xFtxSXZHPexKAb7rKPEbogkBuMP+CQj1Oh9M6L0TcSpMJ+xA WR+HinQqH2qjgPDdoJOYVm+LN5y3963XTZx+rHSccnI6kca0nxL+553DA2xxV3RBSKTI QCVhBiw8Zga9qp/nM4q456swuY6n7lSF13owv3+t13qxpbtApHAdzNR0ehSA/hNzpdW3 wsAi2I6evoDiJ3lmOjx4a0l2KUDNzTM1Wb5gGbBoKOyGygFSQg0yWWH6YG03ot6268ip hP3xEY+2zhJwzyvDp6N5L0bHX3WRr6MdfJWZ+U0HyVE3LJZwJdc92MZAPqS4EniELkMp jyfg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1693413850; x=1694018650; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=a11gaofxrwFqbqRH+84gjUe3pKqOaKVtS0Dgj0k1MQI=; b=fT+nucDb3SrMyvzATQH4DsoCjcBZjpGtQ2oTgwNVnnszxSjeQq6+jcFIvh/EYYbc+p eve/ZRE465yEaYTOmAua45fFqsG5aNzB/un3c/L/0rbBQEXJ1osUoYQ5cBk/wX64BWND Mk/uIk3Tfc5QQHYDGERnFx5JAK06qtKTAfU0aNsmU5ycpqU3tC1bmIw12aJRtDFBzptz +2L6sULqeaPVV4YS4hj3Ht/hJhHY5n6Lq3AeNBLb9hSOUI8OWSBdsAhjW+HHKZNMRFgu e6EplghiMh0aTkv3N3MZjf0m3eNf08YuTlzU61dH2SzotmZEDRA5UfKG46JFHGZPdKhe Bttg== X-Gm-Message-State: AOJu0YxGmEzEJd3dTM6kKz50NFzEliTt2VqKqFiWDBNDT11N/z9itr/x +8CVKlMopjtBlincks4gI2Bn31ihhLUUHNFANaVqE9SeT6hyyGuT/rKrb+XPKeG8MfKzQAv+yCx Kke33SShHE4mh0tvxZgNh/O4tPfL8IEXztPQ1ETqcekkU9NZx+vPiRcIeJDSjBs13TDd1DufPzC zJ X-Google-Smtp-Source: AGHT+IGzxcgEP50oy9LSjTTIW2vGZVwXN/P3c/lRqWzYa4z9II5Lx1WEDcQ6NRtshyHfRSAFQ8IBFsqS+47KcwVlRjW1 X-Received: from jonathantanmy0.svl.corp.google.com ([2620:15c:2d3:204:2899:32d6:b7e3:8e6e]) (user=jonathantanmy job=sendgmr) by 2002:a05:6902:1823:b0:d78:28d0:15bc with SMTP id cf35-20020a056902182300b00d7828d015bcmr6436ybb.4.1693413850250; Wed, 30 Aug 2023 09:44:10 -0700 (PDT) Date: Wed, 30 Aug 2023 09:43:46 -0700 In-Reply-To: Mime-Version: 1.0 References: X-Mailer: git-send-email 2.42.0.rc2.253.gd59a3bf2b4-goog Message-ID: <94ad289dbb1cedfed2b8c66a3b805028e8038317.1693413637.git.jonathantanmy@google.com> Subject: [PATCH v2 06/15] repo-settings: introduce commitgraph.changedPathsVersion From: Jonathan Tan To: git@vger.kernel.org Cc: Jonathan Tan , Junio C Hamano , "SZEDER =?utf-8?b?R8OhYm9y?= " , Taylor Blau Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org A subsequent commit will introduce another version of the changed-path filter in the commit graph file. In order to control which version to write (and read), a config variable is needed. Therefore, introduce this config variable. For forwards compatibility, teach Git to not read commit graphs when the config variable is set to an unsupported version. Because we teach Git this, commitgraph.readChangedPaths is now redundant, so deprecate it and define its behavior in terms of the config variable we introduce. This commit does not change the behavior of writing (Git writes changed path filters when explicitly instructed regardless of any config variable), but a subsequent commit will restrict Git such that it will only write when commitgraph.changedPathsVersion is a recognized value. Signed-off-by: Jonathan Tan Signed-off-by: Junio C Hamano Signed-off-by: Taylor Blau Signed-off-by: Junio C Hamano --- Documentation/config/commitgraph.txt | 23 ++++++++++++++++++++--- commit-graph.c | 2 +- oss-fuzz/fuzz-commit-graph.c | 2 +- repo-settings.c | 6 +++++- repository.h | 2 +- 5 files changed, 28 insertions(+), 7 deletions(-) diff --git a/Documentation/config/commitgraph.txt b/Documentation/config/commitgraph.txt index 30604e4a4c..2dc9170622 100644 --- a/Documentation/config/commitgraph.txt +++ b/Documentation/config/commitgraph.txt @@ -9,6 +9,23 @@ commitGraph.maxNewFilters:: commit-graph write` (c.f., linkgit:git-commit-graph[1]). commitGraph.readChangedPaths:: - If true, then git will use the changed-path Bloom filters in the - commit-graph file (if it exists, and they are present). Defaults to - true. See linkgit:git-commit-graph[1] for more information. + Deprecated. Equivalent to commitGraph.changedPathsVersion=-1 if true, and + commitGraph.changedPathsVersion=0 if false. (If commitGraph.changedPathVersion + is also set, commitGraph.changedPathsVersion takes precedence.) + +commitGraph.changedPathsVersion:: + Specifies the version of the changed-path Bloom filters that Git will read and + write. May be -1, 0 or 1. ++ +Defaults to -1. ++ +If -1, Git will use the version of the changed-path Bloom filters in the +repository, defaulting to 1 if there are none. ++ +If 0, Git will not read any Bloom filters, and will write version 1 Bloom +filters when instructed to write. ++ +If 1, Git will only read version 1 Bloom filters, and will write version 1 +Bloom filters. ++ +See linkgit:git-commit-graph[1] for more information. diff --git a/commit-graph.c b/commit-graph.c index 0aa1640d15..da99f15fdf 100644 --- a/commit-graph.c +++ b/commit-graph.c @@ -401,7 +401,7 @@ struct commit_graph *parse_commit_graph(struct repo_settings *s, graph->read_generation_data = 1; } - if (s->commit_graph_read_changed_paths) { + if (s->commit_graph_changed_paths_version) { pair_chunk(cf, GRAPH_CHUNKID_BLOOMINDEXES, &graph->chunk_bloom_indexes); read_chunk(cf, GRAPH_CHUNKID_BLOOMDATA, diff --git a/oss-fuzz/fuzz-commit-graph.c b/oss-fuzz/fuzz-commit-graph.c index 2992079dd9..325c0b991a 100644 --- a/oss-fuzz/fuzz-commit-graph.c +++ b/oss-fuzz/fuzz-commit-graph.c @@ -19,7 +19,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) * possible. */ the_repository->settings.commit_graph_generation_version = 2; - the_repository->settings.commit_graph_read_changed_paths = 1; + the_repository->settings.commit_graph_changed_paths_version = 1; g = parse_commit_graph(&the_repository->settings, (void *)data, size); repo_clear(the_repository); free_commit_graph(g); diff --git a/repo-settings.c b/repo-settings.c index 525f69c0c7..db8fe817f3 100644 --- a/repo-settings.c +++ b/repo-settings.c @@ -24,6 +24,7 @@ void prepare_repo_settings(struct repository *r) int value; const char *strval; int manyfiles; + int read_changed_paths; if (!r->gitdir) BUG("Cannot add settings for uninitialized repository"); @@ -54,7 +55,10 @@ void prepare_repo_settings(struct repository *r) /* Commit graph config or default, does not cascade (simple) */ repo_cfg_bool(r, "core.commitgraph", &r->settings.core_commit_graph, 1); repo_cfg_int(r, "commitgraph.generationversion", &r->settings.commit_graph_generation_version, 2); - repo_cfg_bool(r, "commitgraph.readchangedpaths", &r->settings.commit_graph_read_changed_paths, 1); + repo_cfg_bool(r, "commitgraph.readchangedpaths", &read_changed_paths, 1); + repo_cfg_int(r, "commitgraph.changedpathsversion", + &r->settings.commit_graph_changed_paths_version, + read_changed_paths ? -1 : 0); repo_cfg_bool(r, "gc.writecommitgraph", &r->settings.gc_write_commit_graph, 1); repo_cfg_bool(r, "fetch.writecommitgraph", &r->settings.fetch_write_commit_graph, 0); diff --git a/repository.h b/repository.h index 5f18486f64..f71154e12c 100644 --- a/repository.h +++ b/repository.h @@ -29,7 +29,7 @@ struct repo_settings { int core_commit_graph; int commit_graph_generation_version; - int commit_graph_read_changed_paths; + int commit_graph_changed_paths_version; int gc_write_commit_graph; int fetch_write_commit_graph; int command_requires_full_index;