[6/7] New utility ubidump

Message ID	53BA4B98.1080000@huawei.com
State	RFC
Headers	show Return-Path: <linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org> Message-ID: <53BA4B98.1080000@huawei.com> Date: Mon, 7 Jul 2014 15:26:16 +0800 From: hujianyang <hujianyang@huawei.com> User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:17.0) Gecko/20130801 Thunderbird/17.0.8 MIME-Version: 1.0 To: linux-mtd <linux-mtd@lists.infradead.org> Subject: [PATCH 6/7] New utility ubidump References: <53BA491E.8060502@huawei.com> In-Reply-To: <53BA491E.8060502@huawei.com> summary: Content analysis details: (-1.4 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [119.145.14.66 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record -0.7 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain Cc: Artem Bityutskiy <dedekind1@gmail.com> Precedence: list Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-mtd" <linux-mtd-bounces@lists.infradead.org> Errors-To: linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org

diff --git a/ubi-utils/ubidump.c b/ubi-utils/ubidump.c new file mode 100644 index 0000000..70808a5 --- /dev/null +++ b/ubi-utils/ubidump.c @@ -0,0 +1,287 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See + * the GNU General Public License for more details. + */ + +/* + * An utility to dump UBI/UBIFS format data in eraseblock + * + * Author: Hu Jianyang <hujianyang@huawei.com> + */ + +#define PROGRAM_NAME "ubidump" + +#include <stdlib.h> +#include <getopt.h> + +#include <libubi.h> +#include <libubifs.h> +#include <libmtd.h> +#include <mtd_swab.h> +#include "common.h" +#include "ubiutils-common.h" + +/* The variables below are set by command line arguments */ +struct args { + const char *vol; + int lnum; + int info:1; + int header:1; + int node:1; +}; + +static struct args args = +{ + .vol = NULL, + .lnum = -1, + .info = 0, + .header = 0, + .node = 0, +}; + +static const char doc[] = PROGRAM_NAME " version " VERSION + " - an utility to dump UBI/UBIFS format data in eraseblock"; + +static const char optionsstr[] = +"-h, --help print help message\n" +"-n, --lnum logic eraseblock num to dump\n" +"-i, --info show explicit information about NODEs\n" +"-H, --header show only header information\n" +"-N, --node show only NODEs information\n" +"-V, --version print program version"; + +static const char usage[] = +"Usage: " PROGRAM_NAME " <UBI volume node file name> [-l <lnum>] [-i]\n" +"\t\t\t[--help] [--version]\n\n" +"Example 1: " PROGRAM_NAME " /dev/ubi0_1 -n 2 - dump leb 2 in volume 1\n" +"Example 2: " PROGRAM_NAME " /dev/ubi0_0 -n 1234 -i - dump leb 1234 with explicit info\n"; + +static const struct option long_options[] = { + { .name = "help", .has_arg = 0, .flag = NULL, .val = 'h' }, + { .name = "lnum", .has_arg = 1, .flag = NULL, .val = 'n' }, + { .name = "info", .has_arg = 0, .flag = NULL, .val = 'i' }, + { .name = "header", .has_arg = 0, .flag = NULL, .val = 'H' }, + { .name = "node", .has_arg = 0, .flag = NULL, .val = 'N' }, + { .name = "version", .has_arg = 0, .flag = NULL, .val = 's' }, + { NULL, 0, NULL, 0} +}; + +static int parse_opt(int argc, char * const argv[]) +{ + while (1) { + int key, error = 0; + + key = getopt_long(argc, argv, "h?in:HN", long_options, NULL); + if (key == -1) + break; + + switch (key) { + case 'n': + args.lnum = simple_strtoul(optarg, &error); + if (error || args.lnum < 0) + return errmsg("bad lnum: \"%s\"", optarg); + break; + + case 'i': + args.info = 1; + break; + + case 'H': + args.header = 1; + break; + + case 'N': + args.node = 1; + break; + + case 'h': + case '?': + printf("%s\n\n", doc); + printf("%s\n\n", usage); + printf("%s\n", optionsstr); + exit(EXIT_SUCCESS); + + case 'V': + common_print_version(); + exit(EXIT_SUCCESS); + + case ':': + return errmsg("parameter is missing"); + + default: + fprintf(stderr, "Use -h for help\n"); + return -1; + } + } + if (optind == argc) + return errmsg("UBI device name was not specified (use -h for help)"); + else if (optind != argc - 1) + return errmsg("more then one UBI device specified (use -h for help)"); + + args.vol = argv[optind]; + + if (args.lnum < 0) + return errmsg("lnum was not specified (use -h for help)"); + if (args.header && (args.info || args.node)) + return errmsg("cannot specify -H with -i or -N"); + + return 0; +} + +static void dump_header(struct ubi_ebdump_req *header) +{ + struct ubi_ec_hdr *ec_hdr = (struct ubi_ec_hdr *)header->ec_hdr; + struct ubi_vid_hdr *vid_hdr = (struct ubi_vid_hdr *)header->vid_hdr; + + printf("lnum %d is mapped to pnum %d\n", header->lnum, header->pnum); + + printf("Erase counter header dump:\n"); + printf("\tmagic %#08x\n", be32_to_cpu(ec_hdr->magic)); + printf("\tversion %d\n", (int)ec_hdr->version); + printf("\tec %llu\n", (long long)be64_to_cpu(ec_hdr->ec)); + printf("\tvid_hdr_offset %d\n", be32_to_cpu(ec_hdr->vid_hdr_offset)); + printf("\tdata_offset %d\n", be32_to_cpu(ec_hdr->data_offset)); + printf("\timage_seq %d\n", be32_to_cpu(ec_hdr->image_seq)); + printf("\thdr_crc %#08x\n", be32_to_cpu(ec_hdr->hdr_crc)); + + printf("Volume identifier header dump:\n"); + printf("\tmagic %08x\n", be32_to_cpu(vid_hdr->magic)); + printf("\tversion %d\n", (int)vid_hdr->version); + printf("\tvol_type %d\n", (int)vid_hdr->vol_type); + printf("\tcopy_flag %d\n", (int)vid_hdr->copy_flag); + printf("\tcompat %d\n", (int)vid_hdr->compat); + printf("\tvol_id %d\n", be32_to_cpu(vid_hdr->vol_id)); + printf("\tlnum %d\n", be32_to_cpu(vid_hdr->lnum)); + printf("\tdata_size %d\n", be32_to_cpu(vid_hdr->data_size)); + printf("\tused_ebs %d\n", be32_to_cpu(vid_hdr->used_ebs)); + printf("\tdata_pad %d\n", be32_to_cpu(vid_hdr->data_pad)); + printf("\tsqnum %llu\n", + (unsigned long long)be64_to_cpu(vid_hdr->sqnum)); + printf("\thdr_crc %08x\n", be32_to_cpu(vid_hdr->hdr_crc)); +} + +static int dump_leb(libubi_t libubi, int fd, struct ubi_vol_info *vol_info) +{ + int ret, leb_size, lnum; + char *buf; + + leb_size = vol_info->leb_size; + lnum = args.lnum; + + ret = ubi_is_mapped(fd, lnum); + if (ret == 0) { + errmsg("lnum %d is not mapped", lnum); + goto out; + } else if (ret < 0) { + sys_errmsg("ubi_is_mapped() failed"); + goto out; + } + + /* dump peb header */ + if (!args.node) { + struct ubi_ebdump_req request; + + memset(&request, 0, sizeof(struct ubi_ebdump_req)); + request.lnum = lnum; + request.pnum = -1; + ret = ubi_leb_dump_header(libubi, fd, &request); + if (ret < 0) { + sys_errmsg("cannot dump header of lnum %d", lnum); + goto out; + } else if (request.pnum == -1) { + errmsg("lnum %d is not mapped", lnum); + goto out; + } + + dump_header(&request); + } + + /* dump NODEs */ + if (!args.header) { + off_t offs = lnum * leb_size; + + buf = malloc(leb_size); + if (!buf) + return errmsg("cannot allocate %d bytes of memory", + leb_size); + + ret = pread(fd, buf, leb_size, offs); + if (ret != leb_size) { + errmsg("cannot read %d bytes at lnum %d, read %d", + leb_size, lnum, ret); + goto out_free; + } + ubifs_scan(lnum, buf, leb_size, 0, args.info); + } + +out_free: + free(buf); +out: + return ret; +} + +int main(int argc, char * const argv[]) +{ + int err, fd; + libubi_t libubi; + struct ubi_vol_info vol_info; + + err = parse_opt(argc, argv); + if (err) + return -1; + + libubi = libubi_open(); + if (!libubi) { + if (errno == 0) + errmsg("UBI is not present in the system"); + else + sys_errmsg("cannot open libubi"); + goto out_libubi; + } + + err = ubi_probe_node(libubi, args.vol); + if (err == 1) { + errmsg("\"%s\" is an UBI device node, not an UBI volume node", + args.vol); + goto out_libubi; + } else if (err < 0) { + if (errno == ENODEV) + errmsg("\"%s\" is not an UBI volume node", args.vol); + else + sys_errmsg("error while probing \"%s\"", args.vol); + goto out_libubi; + } + + err = ubi_get_vol_info(libubi, args.vol, &vol_info); + if (err) { + sys_errmsg("cannot get information about UBI volume \"%s\"", + args.vol); + goto out_libubi; + } + + fd = open(args.vol, O_RDONLY); + if (fd == -1) { + sys_errmsg("cannot open UBI volume \"%s\"", args.vol); + goto out_libubi; + } + err = dump_leb(libubi, fd, &vol_info); + if (err) + goto out_fd; + + close(fd); + libubi_close(libubi); + return 0; + +out_fd: + close(fd); +out_libubi: + libubi_close(libubi); + return -1; +}

[6/7] New utility ubidump

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