From patchwork Sat Jan 16 16:56:18 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Amir Goldstein X-Patchwork-Id: 12024907 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D6FCCC433E9 for ; Sat, 16 Jan 2021 17:07:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A2D8D22A83 for ; Sat, 16 Jan 2021 17:07:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726917AbhAPRHH (ORCPT ); Sat, 16 Jan 2021 12:07:07 -0500 Received: from mail-ej1-f52.google.com ([209.85.218.52]:42968 "EHLO mail-ej1-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727898AbhAPRGu (ORCPT ); Sat, 16 Jan 2021 12:06:50 -0500 Received: by mail-ej1-f52.google.com with SMTP id r12so6420815ejb.9; Sat, 16 Jan 2021 09:06:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=f1/Piw45BGbvrGj/usOEnL03jLiIpZV3qUgR6D6ISU4=; b=PT7/sdoOVEcUwjMhV6ajiRNgPe/lCst2tYkK6pkUhea0W8aH+mITsxze3Zw3yzRvAF ONKnHmAf+3ykHqTzEUnlmsAGuivE10MsG2Q5FL5/ACwnZ6y9a8qZAMtxaYsuizxJcayF tGZr/2wCtp++aDxYEW9vRzjv+dTmpbTJvpGaYK4JKg0TeEKzxG9MyXU3UiD78EMUB/Ad msCnQx3rUJHG9XZEdVoDKOVad86WU1v0l11mfJzw/ElP8fN4yDHStIFxs0Jvf8UOjU+L LakOvIfXJISahQweLZLX9VOTCHg0bzpORsFOSw4JC9uxfEd0T8tE91iN0z5PliogG+WA foSQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=f1/Piw45BGbvrGj/usOEnL03jLiIpZV3qUgR6D6ISU4=; b=YQDxRzG30HoQGqBuKNsVOO6zNJMZ1Tl/ZhPSsfaO5m+qs4Yg67UxzSE5TxIWbX8Ju4 c45oGnlhAeel9Ty0RVjgMGuU1WWYl9Mjss7qAAQ8rJdVTTmPEBktxxV8wx90rY16W6CS 3rL0fzKyU8giOcexT9ltnMh1V92IPqjw8HJjIJwfaiF3/1G7mHDpxrjixaTkAU/ew0gw jYxnb3DPCkZltlvStXByzIkpjJGUoLHC/NiaEeXZIg7gFjth4xZK5cfiAxGs/VntDCDY Fr4I+49RHzoh0MmItFue2IoKqhOREZdTfKRAqdXcG0PMyQu3T4ZP6DP3sWTQ3Iudxxa9 cVNg== X-Gm-Message-State: AOAM531bKTn53i++lFh2WLcYX2ITv9OaTNNNMviL8NDup+tY11NN7pUz 54LOCz7Ojcym+fVNA/wwXArOXfkHmVo= X-Google-Smtp-Source: ABdhPJx3cdhgtX9ufv3PK4FCWEFG4ia55xeGf1EThJ+Bgi+gZ1wqoe0OOMgI6CkKnGai3TpJ5rtHPg== X-Received: by 2002:a17:906:660b:: with SMTP id b11mr13584345ejp.458.1610816188073; Sat, 16 Jan 2021 08:56:28 -0800 (PST) Received: from localhost.localdomain ([31.210.181.203]) by smtp.gmail.com with ESMTPSA id zn8sm7061063ejb.39.2021.01.16.08.56.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 16 Jan 2021 08:56:27 -0800 (PST) From: Amir Goldstein To: Eryu Guan Cc: Icenowy Zheng , Chengguang Xu , Xiao Yang , Miklos Szeredi , linux-unionfs@vger.kernel.org, fstests@vger.kernel.org Subject: [PATCH 3/4] src/t_immutable: Allow setting flags on existing files Date: Sat, 16 Jan 2021 18:56:18 +0200 Message-Id: <20210116165619.494265-4-amir73il@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210116165619.494265-1-amir73il@gmail.com> References: <20210116165619.494265-1-amir73il@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: fstests@vger.kernel.org For overlayfs tests we need to be able to setflags on existing (lower) files. t_immutable -C test_dir Creates the test area and sets flags, but it also allows setting flags on an existing test area. t_immutable -R test_dir Removes the flags from existing test area, but does not remove the files in the test area. To setup a test area with file without flags, need to run the -C and -R commands. Signed-off-by: Amir Goldstein --- src/t_immutable.c | 30 ++++++++++++++++++++++++------ 1 file changed, 24 insertions(+), 6 deletions(-) diff --git a/src/t_immutable.c b/src/t_immutable.c index b6a76af0..a2e6796d 100644 --- a/src/t_immutable.c +++ b/src/t_immutable.c @@ -1898,6 +1898,8 @@ static int check_test_area(const char *dir) return 0; } +static int allow_existing; + static int create_dir(char **ppath, const char *fmt, const char *dir) { const char *path; @@ -1908,6 +1910,9 @@ static int create_dir(char **ppath, const char *fmt, const char *dir) } path = *ppath; if (stat(path, &st) == 0) { + if (allow_existing && S_ISDIR(st.st_mode)) { + return 0; + } fprintf(stderr, "%s: Test area directory %s must not exist for test area creation.\n", __progname, path); return 1; @@ -1921,6 +1926,7 @@ static int create_dir(char **ppath, const char *fmt, const char *dir) static int create_file(char **ppath, const char *fmt, const char *dir) { + int flags = O_WRONLY|O_CREAT | (allow_existing ? 0 : O_EXCL); const char *path; int fd; @@ -1928,7 +1934,7 @@ static int create_file(char **ppath, const char *fmt, const char *dir) return -1; } path = *ppath; - if ((fd = open(path, O_WRONLY|O_CREAT|O_EXCL, 0666)) == -1) { + if ((fd = open(path, flags, 0666)) == -1) { fprintf(stderr, "%s: error creating file %s: %s\n", __progname, path, strerror(errno)); return -1; } @@ -1937,13 +1943,15 @@ static int create_file(char **ppath, const char *fmt, const char *dir) static int create_xattrs(int fd) { - if (fsetxattr(fd, "trusted.test", "readonly", strlen("readonly"), XATTR_CREATE) != 0) { + int flags = allow_existing ? 0 : XATTR_CREATE; + + if (fsetxattr(fd, "trusted.test", "readonly", strlen("readonly"), flags) != 0) { if (errno != EOPNOTSUPP) { perror("setxattr"); return 1; } } - if (fsetxattr(fd, "user.test", "readonly", strlen("readonly"), XATTR_CREATE) != 0) { + if (fsetxattr(fd, "user.test", "readonly", strlen("readonly"), flags) != 0) { if (errno != EOPNOTSUPP) { perror("setxattr"); return 1; @@ -2214,6 +2222,10 @@ static int remove_test_area(const char *dir) return 1; } + if (allow_existing) { + return 0; + } + pid = fork(); if (!pid) { execl("/bin/rm", "rm", "-rf", dir, NULL); @@ -2236,7 +2248,7 @@ int main(int argc, char **argv) /* this arg parsing is gross, but who cares, its a test program */ if (argc < 2) { - fprintf(stderr, "usage: t_immutable [-C|-c|-r] test_area_dir\n"); + fprintf(stderr, "usage: t_immutable [-C|-c|-R|-r] test_area_dir\n"); return 1; } @@ -2246,18 +2258,24 @@ int main(int argc, char **argv) /* Prepare test area without running tests */ create = 1; runtest = 0; + /* With existing test area, only setflags */ + allow_existing = 1; } else if (!strcmp(argv[1], "-r")) { remove = 1; + } else if (!strcmp(argv[1], "-R")) { + /* Cleanup flags on test area but leave the files */ + remove = 1; + allow_existing = 1; } if (argc != 2 + (create | remove)) { - fprintf(stderr, "usage: t_immutable [-C|-c|-r] test_area_dir\n"); + fprintf(stderr, "usage: t_immutable [-C|-c|-R|-r] test_area_dir\n"); return 1; } if (create) { ret = create_test_area(argv[argc-1]); - if (ret || !runtest) { + if (ret || allow_existing) { return ret; } } else if (remove) {