From patchwork Fri Jul 1 20:13:32 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeremy Bongio X-Patchwork-Id: 12903735 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 B7054C433EF for ; Fri, 1 Jul 2022 20:14:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231168AbiGAUOf (ORCPT ); Fri, 1 Jul 2022 16:14:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46732 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231879AbiGAUOW (ORCPT ); Fri, 1 Jul 2022 16:14:22 -0400 Received: from mail-pj1-x102a.google.com (mail-pj1-x102a.google.com [IPv6:2607:f8b0:4864:20::102a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2582A38BD9; Fri, 1 Jul 2022 13:13:43 -0700 (PDT) Received: by mail-pj1-x102a.google.com with SMTP id m14-20020a17090a668e00b001ee6ece8368so7480133pjj.3; Fri, 01 Jul 2022 13:13:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=bPhn3Uhl4H1zHOekhhXk/7t7ZKhvHKDOArswHhj5vQI=; b=YOC2GmZxeyo6dedxa1EUJjieJIUbNMEmv1YmOWziRIIX+ifCFs67dDvUQCGvJs0QHA untvfkrgQLNsKI32/57nu4M0yrZZnjtrhAaRPGYBrGsJpAG0qMN9fKwnn1A0sRIybN70 FplDXg/WIrcbxJOTVF1HYMozYTJk5l5hMp0OfCQKr70mDEvsNW5L3vfRISc7ocVzUKR2 y14Cuo05JUjbWicZ6GvV/GvDxxz/pges9FfiXifxBAJCKNbAc3LR3bqboCm1dSgkpil+ moqrlut1zm8ML+i6rUGmd/RRBEvJ5fnYAhGLIBiCd5phnCVVSf0mbG6bEsHzW61zGdOe MIYw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=bPhn3Uhl4H1zHOekhhXk/7t7ZKhvHKDOArswHhj5vQI=; b=Q9ol2aodBMh7R7NOZN4RF000Lzbgx/fAilErnop3emq/qf5eFj7sqaAALhk5UcfFTu JU9Mp/gvNECVvO5rvxBCEA+yr3cyJNrX3RLOnsHZxpqvTEv/xkE5MRPP5zHIH46QWi9S 1htn5Om8N9BwL1zyxYMYiMKDk1ZgaKglKWhiJeF4HAM1RjfaCFveN5LxmSEUuEpXmnkZ CsbVig+uTovGpkdPH8WGI9Gtg1Em2w/+9wP4ECwynQaetzkSvhmLaJRBnoT5f2wPtNMt rMB116snZUfxLiN3+jGS1jUU/tIkIZN8lxMiQRWrLb+01ZmhSeBndr+SnPy2sMKsEyJg Kb7w== X-Gm-Message-State: AJIora/wJlcrCMlOuToXab0pUsdsNjORxAmCJA1FY4f4KDw+ab3QrRbc ElVgF1w7IKNsdWJmmYhVO+E= X-Google-Smtp-Source: AGRyM1vvagagRd/zzmJyghCKGZwpL5w8t/Cnco0pmBIJdBZMOvLUeFCSvdT4rO3+4BLPWJEStKCvxA== X-Received: by 2002:a17:902:edd1:b0:158:8318:b51e with SMTP id q17-20020a170902edd100b001588318b51emr22442904plk.89.1656706422622; Fri, 01 Jul 2022 13:13:42 -0700 (PDT) Received: from jbongio9100214.corp.google.com ([2620:0:102f:1:443b:ca33:8b9a:ccba]) by smtp.googlemail.com with ESMTPSA id v10-20020a63f84a000000b003fd9b8b865dsm15782117pgj.0.2022.07.01.13.13.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 01 Jul 2022 13:13:42 -0700 (PDT) From: Jeremy Bongio To: Ted Tso Cc: linux-ext4@vger.kernel.org, fstests@vger.kernel.org, Jeremy Bongio Subject: [PATCH v2] ext4/056: add a check to make sure ext4 uuid ioctls get/set during fsstress. Date: Fri, 1 Jul 2022 13:13:32 -0700 Message-Id: <20220701201332.183711-1-bongiojp@gmail.com> X-Mailer: git-send-email 2.37.0.rc0.161.g10f37bed90-goog MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: fstests@vger.kernel.org Adds a utility to set/get uuid through ext4 ioctl. Executes the ioctls while running fsstress. These ioctls are used by tune2fs to safely change the uuid without racing other filesystem modifications. Signed-off-by: Jeremy Bongio --- .gitignore | 1 + src/Makefile | 4 +- src/uuid_ioctl.c | 106 +++++++++++++++++++++++++++++++++++++++++++++ tests/ext4/056 | 55 +++++++++++++++++++++++ tests/ext4/056.out | 2 + 5 files changed, 166 insertions(+), 2 deletions(-) create mode 100644 src/uuid_ioctl.c create mode 100755 tests/ext4/056 create mode 100644 tests/ext4/056.out diff --git a/.gitignore b/.gitignore index ba0c572b..dab24d68 100644 --- a/.gitignore +++ b/.gitignore @@ -169,6 +169,7 @@ tags /src/unwritten_mmap /src/unwritten_sync /src/usemem +/src/uuid_ioctl /src/writemod /src/writev_on_pagefault /src/xfsctl diff --git a/src/Makefile b/src/Makefile index 111ce1d9..e33e04de 100644 --- a/src/Makefile +++ b/src/Makefile @@ -31,14 +31,14 @@ LINUX_TARGETS = xfsctl bstat t_mtab getdevicesize preallo_rw_pattern_reader \ dio-invalidate-cache stat_test t_encrypted_d_revalidate \ attr_replace_test swapon mkswap t_attr_corruption t_open_tmpfiles \ fscrypt-crypt-util bulkstat_null_ocount splice-test chprojid_fail \ - detached_mounts_propagation ext4_resize + detached_mounts_propagation ext4_resize uuid_ioctl EXTRA_EXECS = dmerror fill2attr fill2fs fill2fs_check scaleread.sh \ btrfs_crc32c_forged_name.py SUBDIRS = log-writes perf -LLDLIBS = $(LIBHANDLE) $(LIBACL) -lpthread -lrt +LLDLIBS = $(LIBHANDLE) $(LIBACL) -lpthread -lrt -luuid ifeq ($(HAVE_XLOG_ASSIGN_LSN), true) LINUX_TARGETS += loggen diff --git a/src/uuid_ioctl.c b/src/uuid_ioctl.c new file mode 100644 index 00000000..a4937478 --- /dev/null +++ b/src/uuid_ioctl.c @@ -0,0 +1,106 @@ +// SPDX-License-Identifier: GPL-2.0 + +/* + * Test program which uses the raw ext4 set_fsuuid ioctl directly. + * SYNOPSIS: + * $0 COMMAND MOUNT_POINT [UUID] + * + * COMMAND must be either "get" or "set". + * The UUID must be a 16 octet represented as 32 hexadecimal digits in canonical + * textual representation, e.g. output from `uuidgen`. + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +struct fsuuid { + __u32 fu_len; + __u32 fu_flags; + __u8 fu_uuid[]; +}; + +#define EXT4_IOC_SETFSUUID_FLAG_BLOCKING 0x1 + +#ifndef EXT4_IOC_GETFSUUID +#define EXT4_IOC_GETFSUUID _IOR('f', 44, struct fsuuid) +#endif + +#ifndef EXT4_IOC_SETFSUUID +#define EXT4_IOC_SETFSUUID _IOW('f', 44, struct fsuuid) +#endif + +int main(int argc, char **argv) +{ + int error, fd; + struct fsuuid *fsuuid = NULL; + + if (argc < 3) { + fprintf(stderr, "Invalid arguments\n"); + return 1; + } + + fd = open(argv[2], O_RDONLY); + if (!fd) { + perror(argv[2]); + return 1; + } + + fsuuid = malloc(sizeof(*fsuuid) + sizeof(uuid_t)); + if (!fsuuid) { + perror("malloc"); + return 1; + } + fsuuid->fu_len = sizeof(uuid_t); + + if (strcmp(argv[1], "get") == 0) { + uuid_t uuid; + char uuid_str[37]; + + if (ioctl(fd, EXT4_IOC_GETFSUUID, fsuuid)) { + fprintf(stderr, "%s while trying to get fs uuid\n", + strerror(errno)); + return 1; + } + + memcpy(&uuid, fsuuid->fu_uuid, sizeof(uuid)); + uuid_unparse(uuid, uuid_str); + printf("%s", uuid_str); + } else if (strcmp(argv[1], "set") == 0) { + uuid_t uuid; + + if (argc != 4) { + fprintf(stderr, "UUID argument missing.\n"); + return 1; + } + + error = uuid_parse(argv[3], uuid); + if (error < 0) { + fprintf(stderr, "Invalid UUID. The UUID should be in " + "canonical format. Example: " + "8c628557-6987-42b2-ba16-b7cc79ddfb43\n"); + return 1; + } + + memcpy(&fsuuid->fu_uuid, uuid, sizeof(uuid)); + fsuuid->fu_flags = EXT4_IOC_SETFSUUID_FLAG_BLOCKING; + if (ioctl(fd, EXT4_IOC_SETFSUUID, fsuuid)) { + fprintf(stderr, "%s while trying to set fs uuid\n", + strerror(errno)); + return 1; + } + } else { + fprintf(stderr, "Invalid command\n"); + return 1; + } + + return 0; +} diff --git a/tests/ext4/056 b/tests/ext4/056 new file mode 100755 index 00000000..ebefb136 --- /dev/null +++ b/tests/ext4/056 @@ -0,0 +1,55 @@ +#! /bin/bash +# SPDX-License-Identifier: GPL-2.0 +# +# Test the set/get UUID ioctl. +# + +. ./common/preamble +_begin_fstest auto ioctl + +# Import common functions. +. ./common/filter + +# real QA test starts here +_supported_fs ext4 +_require_scratch +_require_test_program uuid_ioctl +_require_command $UUIDGEN_PROG uuidgen + +UUID_IOCTL=$here/src/uuid_ioctl + +# if the ioctl is not supported by the kernel, then skip test. +current_uuid=$($UUID_IOCTL get $SCRATCH_MNT 2>&1) +if [[ "$current_uuid" =~ ^Inappropriate[[:space:]]ioctl ]]; then + _notrun "UUID ioctls are not supported by kernel." +fi + +# Create filesystem and mount +_scratch_mkfs_ext4 -O metadata_csum_seed >> $seqres.full 2>&1 +_scratch_mount >> $seqres.full + +# Begin fsstress while modifying UUID +fsstress_args=$(_scale_fsstress_args -d $SCRATCH_MNT -p 15 -n 999999) +$FSSTRESS_PROG $fsstress_args > /dev/null 2>&1 & +fsstress_pid=$! + +for n in $(seq 1 20); do + new_uuid=$($UUIDGEN_PROG) + + echo "Setting UUID to ${new_uuid}" >> $seqres.full 2>&1 + $UUID_IOCTL set $SCRATCH_MNT $new_uuid + + current_uuid=$($UUID_IOCTL get $SCRATCH_MNT) + echo "$UUID_IOCTL get $SCARTCH_MNT: $current_uuid" >> $seqres.full 2>&1 + if [[ "$current_uuid" != "$new_uuid" ]]; then + echo "Current UUID ($current_uuid) does not equal what " + "was sent with the ioctl ($new_uuid)" + fi +done + +# success, all done +echo "Silence is golden" +kill $fsstress_pid >/dev/null 2>&1 +wait +status=0 +exit diff --git a/tests/ext4/056.out b/tests/ext4/056.out new file mode 100644 index 00000000..6142fcd2 --- /dev/null +++ b/tests/ext4/056.out @@ -0,0 +1,2 @@ +QA output created by 056 +Silence is golden