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[79.136.22.50]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b1fcfe888bcsm140703166b.71.2025.09.18.00.45.10 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 18 Sep 2025 00:45:10 -0700 (PDT) From: Tobias Waldekranz To: barebox@lists.infradead.org Date: Thu, 18 Sep 2025 09:43:15 +0200 Message-ID: <20250918074455.891780-6-tobias@waldekranz.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250918074455.891780-1-tobias@waldekranz.com> References: <20250918074455.891780-1-tobias@waldekranz.com> MIME-Version: 1.0 Organization: Wires Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250918_004513_304977_955E561C X-CRM114-Status: GOOD ( 15.22 ) X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:3::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.whiteo.stw.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-4.0 required=4.0 tests=AWL,BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, RCVD_IN_DNSWL_LOW,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: [PATCH 05/11] commands: veritysetup: Create dm-verity devices X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.whiteo.stw.pengutronix.de) For hash devices that contain a superblock, parse it and setup a dm-verity device based on that information. Signed-off-by: Tobias Waldekranz --- commands/Kconfig | 10 ++++ commands/Makefile | 1 + commands/veritysetup.c | 123 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 134 insertions(+) create mode 100644 commands/veritysetup.c diff --git a/commands/Kconfig b/commands/Kconfig index 219f626c3e..1924016756 100644 --- a/commands/Kconfig +++ b/commands/Kconfig @@ -789,6 +789,16 @@ config CMD_UMOUNT Unmount a filesystem mounted on a specific MOINTPOINT +config CMD_VERITYSETUP + tristate + depends on DM_BLK_VERITY + prompt "veritysetup" + help + veritysetup - manage dm-verity volumes + + commands: + open + # end Partition commands endmenu diff --git a/commands/Makefile b/commands/Makefile index 6b010fe30c..62dd8284cd 100644 --- a/commands/Makefile +++ b/commands/Makefile @@ -167,4 +167,5 @@ obj-$(CONFIG_CMD_PARTED) += parted.o obj-$(CONFIG_CMD_EFI_HANDLE_DUMP) += efi_handle_dump.o obj-$(CONFIG_CMD_HOST) += host.o obj-$(CONFIG_CMD_DMSETUP) += dmsetup.o +obj-$(CONFIG_CMD_VERITYSETUP) += veritysetup.o UBSAN_SANITIZE_ubsan.o := y diff --git a/commands/veritysetup.c b/commands/veritysetup.c new file mode 100644 index 0000000000..99f27278f8 --- /dev/null +++ b/commands/veritysetup.c @@ -0,0 +1,123 @@ +// SPDX-License-Identifier: GPL-2.0-only +// SPDX-FileCopyrightText: © 2025 Tobias Waldekranz , Wires + +#include +#include +#include +#include + +static int veritysetup_dump(int argc, char *argv[]) +{ + char *config; + + if (argc != 1) + return COMMAND_ERROR_USAGE; + + config = dm_verity_config_from_sb("", argv[0], ""); + if (IS_ERR(config)) { + printf("Invalid or missing superblock: %pe\n", config); + return COMMAND_ERROR; + } + + puts(config); + free(config); + return COMMAND_SUCCESS; +} + +static struct dm_device *veritysetup_find(const char *name) +{ + struct dm_device *dm; + + dm = dm_find_by_name(name); + if (IS_ERR_OR_NULL(dm)) { + printf("Found no device named \"%s\"\n", name); + return NULL; + } + + return dm; +} + +static int veritysetup_close(int argc, char *argv[]) +{ + struct dm_device *dm; + + if (argc != 1) + return COMMAND_ERROR_USAGE; + + dm = veritysetup_find(argv[0]); + if (!dm) + return COMMAND_ERROR; + + dm_destroy(dm); + + printf("Removed %s\n", argv[0]); + return COMMAND_SUCCESS; +} + +static int veritysetup_open(int argc, char *argv[]) +{ + struct dm_device *dm; + char *config; + + if (argc != 4) + return COMMAND_ERROR_USAGE; + + config = dm_verity_config_from_sb(argv[0], argv[2], argv[3]); + if (IS_ERR(config)) { + printf("Invalid or missing superblock: %pe\n", config); + return COMMAND_ERROR; + } + + dm = dm_create(argv[1], config); + free(config); + if (IS_ERR_OR_NULL(dm)) { + printf("Failed to create %s: %pe\n", argv[1], dm); + return COMMAND_ERROR; + } + + printf("Created %s\n", argv[1]); + return COMMAND_SUCCESS; +} + +static int do_veritysetup(int argc, char *argv[]) +{ + const char *cmd; + + if (argc < 2) + return COMMAND_ERROR_USAGE; + + cmd = argv[1]; + argc -= 2; + argv += 2; + + if (!strcmp(cmd, "open")) + return veritysetup_open(argc, argv); + else if (!strcmp(cmd, "close")) + return veritysetup_close(argc, argv); + else if (!strcmp(cmd, "dump")) + return veritysetup_dump(argc, argv); + + printf("Unknown command: %s\n", cmd); + return -EINVAL; +} + +BAREBOX_CMD_HELP_START(veritysetup) +BAREBOX_CMD_HELP_TEXT("veritysetup - manage dm-verity volumes") +BAREBOX_CMD_HELP_TEXT("") +BAREBOX_CMD_HELP_TEXT("Layers a transparent integrity layer on top of an existing") +BAREBOX_CMD_HELP_TEXT("device, backed by a Merkle tree whose root hash must be") +BAREBOX_CMD_HELP_TEXT("verified by an externally provided signature") +BAREBOX_CMD_HELP_TEXT("") +BAREBOX_CMD_HELP_TEXT("commands:") +BAREBOX_CMD_HELP_OPT("open ", "Create new device") +BAREBOX_CMD_HELP_OPT("close ", "Remove device") +BAREBOX_CMD_HELP_OPT("dump ", "Dump superblock information") +BAREBOX_CMD_HELP_END + +BAREBOX_CMD_START(veritysetup) + .cmd = do_veritysetup, + BAREBOX_CMD_DESC("manage dm-verity volumes") + BAREBOX_CMD_OPTS(" [args...]") + BAREBOX_CMD_GROUP(CMD_GRP_PART) + BAREBOX_CMD_HELP(cmd_veritysetup_help) +BAREBOX_CMD_END -- 2.43.0