From patchwork Tue Nov 22 00:09:27 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Wong X-Patchwork-Id: 13051730 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 8E1BBC433FE for ; Tue, 22 Nov 2022 00:09:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229624AbiKVAJd (ORCPT ); Mon, 21 Nov 2022 19:09:33 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38392 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231891AbiKVAJ3 (ORCPT ); Mon, 21 Nov 2022 19:09:29 -0500 Received: from dcvr.yhbt.net (dcvr.yhbt.net [173.255.242.215]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2284E92B65 for ; Mon, 21 Nov 2022 16:09:28 -0800 (PST) Received: from localhost (dcvr.yhbt.net [127.0.0.1]) by dcvr.yhbt.net (Postfix) with ESMTP id EC9671F910; Tue, 22 Nov 2022 00:09:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=80x24.org; s=selector1; t=1669075768; bh=+Z7KL4KRzdqTu1RVSw9nMOOhNyyOKVIRMLOWQggyhiw=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=CAxhiJkBBCXs5zENbffbFyk8ru5XuxU4nGmrkQq29y14Vxbc3h8MsgyDSiPXOhl4v 9AuhpZSh8xpfy5Qmxa6YZy8o2zVdG2hAhvlgOkuToZfBurnaj0zv/CaZIRP5gwY7DQ AF4eB0Z4jV1kfPCLOXPW1tpYgfOlPNuFAyUYHLKA= Date: Tue, 22 Nov 2022 00:09:27 +0000 From: Eric Wong To: Junio C Hamano Cc: git@vger.kernel.org Subject: [PATCH] prune: recursively prune objects directory Message-ID: <20221122000927.M873500@dcvr> References: <20221119201213.2398081-1-e@80x24.org> <20221121104427.M268307@dcvr> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org Junio C Hamano wrote: > Junio C Hamano writes: > > >> prune_packed_objects(show_only ? PRUNE_PACKED_DRY_RUN : 0); > >> - remove_temporary_files(get_object_directory()); > >> s = mkpathdup("%s/pack", get_object_directory()); > >> remove_temporary_files(s); > >> free(s); > > > > I actually was hinting at making the remove_temporary_files() > > recurse, so that you do not need the separate invocation in pack/ > > subdirectory. > > > > Or make 256 calls for each of the fan-out subdirectory, in which > > case the ENOENT silencing you did would really matter and shine. > > But of course, neither is any part of this topic. They are possible > follow-on works. > > Thanks and sorry for making a confusing statement that could be > mistaken as "let's do this too", which wasn't what I meant. Oh, no worries. I already wrote this earlier and got distracted with something else while waiting for tests :x. Anyways, the below supercedes my original patch and I think it's better in every way. I am unsure about duplicating ishex() from name-rev.c, however... ------8<----- Subject: [PATCH] prune: recursively prune objects directory $GIT_DIR/objects/pack may be removed to save inodes in shared repositories, so avoid scanning it if it does not exist. Loose object directories ($GIT_DIR/objects/??) may have old temporary files, so we now prune those, too. Recursion is limited to a single level since git doesn't use deeper levels. This avoids the risk of stack overflows via infinite recursion when pruning untrusted repos. We'll also emit the system error in case a directory cannot be opened to help users diagnose permissions problems or resource constraints. Signed-off-by: Eric Wong Signed-off-by: Eric Wong --- builtin/prune.c | 28 ++++++++++++++++++++-------- t/t5304-prune.sh | 16 ++++++++++++++++ 2 files changed, 36 insertions(+), 8 deletions(-) diff --git a/builtin/prune.c b/builtin/prune.c index df376b2ed1..0f6a33690a 100644 --- a/builtin/prune.c +++ b/builtin/prune.c @@ -114,25 +114,41 @@ static int prune_subdir(unsigned int nr, const char *path, void *data) return 0; } +/* + * XXX ishex is duplicated in builtin/name-rev.c, perhaps git-compat-util.h + * is a better home for it + */ +#define ishex(x) (isdigit((x)) || ((x) >= 'a' && (x) <= 'f')) +static int is_loose_prefix(const char *d_name) +{ + return strlen(d_name) == 2 && ishex(d_name[0]) && ishex(d_name[1]); +} + /* * Write errors (particularly out of space) can result in * failed temporary packs (and more rarely indexes and other * files beginning with "tmp_") accumulating in the object * and the pack directories. */ -static void remove_temporary_files(const char *path) +static void remove_temporary_files(const char *path, int recurse) { DIR *dir; struct dirent *de; dir = opendir(path); if (!dir) { - fprintf(stderr, "Unable to open directory %s\n", path); + warning_errno(_("unable to open directory %s"), path); return; } while ((de = readdir(dir)) != NULL) - if (starts_with(de->d_name, "tmp_")) + if (starts_with(de->d_name, "tmp_")) { prune_tmp_file(mkpath("%s/%s", path, de->d_name)); + } else if (recurse && (strcmp(de->d_name, "packs") == 0 || + is_loose_prefix(de->d_name))) { + char *s = mkpathdup("%s/%s", path, de->d_name); + remove_temporary_files(s, 0); + free(s); + } closedir(dir); } @@ -150,7 +166,6 @@ int cmd_prune(int argc, const char **argv, const char *prefix) N_("limit traversal to objects outside promisor packfiles")), OPT_END() }; - char *s; expire = TIME_MAX; save_commit_buffer = 0; @@ -186,10 +201,7 @@ int cmd_prune(int argc, const char **argv, const char *prefix) prune_cruft, prune_subdir, &revs); prune_packed_objects(show_only ? PRUNE_PACKED_DRY_RUN : 0); - remove_temporary_files(get_object_directory()); - s = mkpathdup("%s/pack", get_object_directory()); - remove_temporary_files(s); - free(s); + remove_temporary_files(get_object_directory(), 1); if (is_repository_shallow(the_repository)) { perform_reachability_traversal(&revs); diff --git a/t/t5304-prune.sh b/t/t5304-prune.sh index 8ae314af58..8c2278035e 100755 --- a/t/t5304-prune.sh +++ b/t/t5304-prune.sh @@ -29,6 +29,22 @@ test_expect_success setup ' git gc ' +test_expect_success 'prune stale loose objects' ' + mkdir .git/objects/aa && + >.git/objects/aa/tmp_foo && + test-tool chmtime =-86501 .git/objects/aa/tmp_foo && + git prune --expire 1.day && + test_path_is_missing .git/objects/aa/tmp_foo +' + +test_expect_success 'bare repo prune is quiet without $GIT_DIR/objects/pack' ' + git clone -q --shared --template= --bare . bare.git && + rmdir bare.git/objects/pack && + git --git-dir=bare.git prune --no-progress 2>prune.err && + test_must_be_empty prune.err && + rm -r bare.git prune.err +' + test_expect_success 'prune stale packs' ' orig_pack=$(echo .git/objects/pack/*.pack) && >.git/objects/tmp_1.pack &&