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656 lines
16 KiB
C
656 lines
16 KiB
C
/******************************************************************************
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* vtoydump.c ---- Dump ventoy os parameters
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*
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* Copyright (c) 2020, longpanda <admin@ventoy.net>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#include <sys/mman.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <linux/fs.h>
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#include <dirent.h>
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#define IS_DIGIT(x) ((x) >= '0' && (x) <= '9')
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#ifndef USE_DIET_C
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#ifndef __mips__
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typedef unsigned long long uint64_t;
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#endif
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typedef unsigned int uint32_t;
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typedef unsigned short uint16_t;
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typedef unsigned char uint8_t;
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#endif
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#define VENTOY_GUID { 0x77772020, 0x2e77, 0x6576, { 0x6e, 0x74, 0x6f, 0x79, 0x2e, 0x6e, 0x65, 0x74 }}
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typedef enum ventoy_fs_type
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{
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ventoy_fs_exfat = 0, /* 0: exfat */
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ventoy_fs_ntfs, /* 1: NTFS */
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ventoy_fs_ext, /* 2: ext2/ext3/ext4 */
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ventoy_fs_xfs, /* 3: XFS */
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ventoy_fs_udf, /* 4: UDF */
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ventoy_fs_fat, /* 5: FAT */
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ventoy_fs_max
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}ventoy_fs_type;
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#pragma pack(1)
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typedef struct ventoy_guid
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{
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uint32_t data1;
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uint16_t data2;
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uint16_t data3;
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uint8_t data4[8];
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}ventoy_guid;
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typedef struct ventoy_image_disk_region
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{
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uint32_t image_sector_count; /* image sectors contained in this region */
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uint32_t image_start_sector; /* image sector start */
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uint64_t disk_start_sector; /* disk sector start */
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}ventoy_image_disk_region;
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typedef struct ventoy_image_location
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{
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ventoy_guid guid;
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/* image sector size, currently this value is always 2048 */
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uint32_t image_sector_size;
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/* disk sector size, normally the value is 512 */
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uint32_t disk_sector_size;
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uint32_t region_count;
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/*
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* disk region data
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* If the image file has more than one fragments in disk,
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* there will be more than one region data here.
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* You can calculate the region count by
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*/
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ventoy_image_disk_region regions[1];
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/* ventoy_image_disk_region regions[2~region_count-1] */
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}ventoy_image_location;
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typedef struct ventoy_os_param
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{
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ventoy_guid guid; // VENTOY_GUID
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uint8_t chksum; // checksum
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uint8_t vtoy_disk_guid[16];
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uint64_t vtoy_disk_size; // disk size in bytes
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uint16_t vtoy_disk_part_id; // begin with 1
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uint16_t vtoy_disk_part_type; // 0:exfat 1:ntfs other: reserved
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char vtoy_img_path[384]; // It seems to be enough, utf-8 format
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uint64_t vtoy_img_size; // image file size in bytes
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/*
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* Ventoy will write a copy of ventoy_image_location data into runtime memory
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* this is the physically address and length of that memory.
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* Address 0 means no such data exist.
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* Address will be aligned by 4KB.
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*
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*/
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uint64_t vtoy_img_location_addr;
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uint32_t vtoy_img_location_len;
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uint64_t vtoy_reserved[4]; // Internal use by ventoy
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uint8_t vtoy_disk_signature[4];
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uint8_t reserved[27];
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}ventoy_os_param;
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#pragma pack()
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#ifndef O_BINARY
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#define O_BINARY 0
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#endif
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#if defined(_dragon_fly) || defined(_free_BSD) || defined(_QNX)
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#define MMAP_FLAGS MAP_SHARED
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#else
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#define MMAP_FLAGS MAP_PRIVATE
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#endif
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#define SEARCH_MEM_START 0x80000
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#define SEARCH_MEM_LEN 0x1c000
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static int verbose = 0;
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#define debug(fmt, ...) if(verbose) printf(fmt, ##__VA_ARGS__)
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static ventoy_guid vtoy_guid = VENTOY_GUID;
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static const char *g_ventoy_fs[ventoy_fs_max] =
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{
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"exfat", "ntfs", "ext*", "xfs", "udf", "fat"
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};
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static int vtoy_check_os_param(ventoy_os_param *param)
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{
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uint32_t i;
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uint8_t chksum = 0;
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uint8_t *buf = (uint8_t *)param;
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if (memcmp(¶m->guid, &vtoy_guid, sizeof(ventoy_guid)))
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{
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uint8_t *data1 = (uint8_t *)(¶m->guid);
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uint8_t *data2 = (uint8_t *)(&vtoy_guid);
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for (i = 0; i < 16; i++)
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{
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if (data1[i] != data2[i])
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{
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debug("guid not equal i = %u, 0x%02x, 0x%02x\n", i, data1[i], data2[i]);
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}
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}
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return 1;
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}
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for (i = 0; i < sizeof(ventoy_os_param); i++)
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{
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chksum += buf[i];
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}
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if (chksum)
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{
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debug("Invalid checksum 0x%02x\n", chksum);
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return 1;
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}
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return 0;
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}
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static int vtoy_os_param_from_file(const char *filename, ventoy_os_param *param)
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{
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int fd = 0;
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int rc = 0;
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fd = open(filename, O_RDONLY | O_BINARY);
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if (fd < 0)
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{
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fprintf(stderr, "Failed to open file %s error %d\n", filename, errno);
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return errno;
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}
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read(fd, param, sizeof(ventoy_os_param));
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if (vtoy_check_os_param(param) == 0)
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{
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debug("find ventoy os param in file %s\n", filename);
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}
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else
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{
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debug("ventoy os pararm NOT found in file %s\n", filename);
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rc = 1;
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}
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close(fd);
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return rc;
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}
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static void vtoy_dump_os_param(ventoy_os_param *param)
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{
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printf("################# dump os param ################\n");
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printf("param->chksum = 0x%x\n", param->chksum);
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printf("param->vtoy_disk_guid = %02x %02x %02x %02x\n",
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param->vtoy_disk_guid[0], param->vtoy_disk_guid[1],
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param->vtoy_disk_guid[2], param->vtoy_disk_guid[3]);
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printf("param->vtoy_disk_signature = %02x %02x %02x %02x\n",
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param->vtoy_disk_signature[0], param->vtoy_disk_signature[1],
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param->vtoy_disk_signature[2], param->vtoy_disk_signature[3]);
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printf("param->vtoy_disk_size = %llu\n", (unsigned long long)param->vtoy_disk_size);
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printf("param->vtoy_disk_part_id = %u\n", param->vtoy_disk_part_id);
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printf("param->vtoy_disk_part_type = %u\n", param->vtoy_disk_part_type);
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printf("param->vtoy_img_path = <%s>\n", param->vtoy_img_path);
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printf("param->vtoy_img_size = <%llu>\n", (unsigned long long)param->vtoy_img_size);
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printf("param->vtoy_img_location_addr = <0x%llx>\n", (unsigned long long)param->vtoy_img_location_addr);
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printf("param->vtoy_img_location_len = <%u>\n", param->vtoy_img_location_len);
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printf("param->vtoy_reserved[0] = 0x%llx\n", (unsigned long long)param->vtoy_reserved[0]);
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printf("param->vtoy_reserved[1] = 0x%llx\n", (unsigned long long)param->vtoy_reserved[1]);
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printf("\n");
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}
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static int vtoy_get_disk_guid(const char *diskname, uint8_t *vtguid, uint8_t *vtsig)
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{
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int i = 0;
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int fd = 0;
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char devdisk[128] = {0};
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snprintf(devdisk, sizeof(devdisk) - 1, "/dev/%s", diskname);
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fd = open(devdisk, O_RDONLY | O_BINARY);
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if (fd >= 0)
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{
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lseek(fd, 0x180, SEEK_SET);
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read(fd, vtguid, 16);
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lseek(fd, 0x1b8, SEEK_SET);
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read(fd, vtsig, 4);
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close(fd);
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debug("GUID for %s: <", devdisk);
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for (i = 0; i < 16; i++)
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{
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debug("%02x", vtguid[i]);
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}
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debug(">\n");
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return 0;
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}
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else
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{
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debug("failed to open %s %d\n", devdisk, errno);
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return errno;
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}
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}
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static unsigned long long vtoy_get_disk_size_in_byte(const char *disk)
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{
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int fd;
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int rc;
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unsigned long long size = 0;
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char diskpath[256] = {0};
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char sizebuf[64] = {0};
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// Try 1: get size from sysfs
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snprintf(diskpath, sizeof(diskpath) - 1, "/sys/block/%s/size", disk);
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if (access(diskpath, F_OK) >= 0)
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{
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debug("get disk size from sysfs for %s\n", disk);
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fd = open(diskpath, O_RDONLY | O_BINARY);
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if (fd >= 0)
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{
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read(fd, sizebuf, sizeof(sizebuf));
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size = strtoull(sizebuf, NULL, 10);
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close(fd);
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return (size * 512);
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}
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}
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else
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{
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debug("%s not exist \n", diskpath);
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}
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// Try 2: get size from ioctl
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snprintf(diskpath, sizeof(diskpath) - 1, "/dev/%s", disk);
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fd = open(diskpath, O_RDONLY);
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if (fd >= 0)
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{
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debug("get disk size from ioctl for %s\n", disk);
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rc = ioctl(fd, BLKGETSIZE64, &size);
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if (rc == -1)
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{
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size = 0;
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debug("failed to ioctl %d\n", rc);
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}
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close(fd);
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}
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else
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{
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debug("failed to open %s %d\n", diskpath, errno);
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}
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debug("disk %s size %llu bytes\n", disk, (unsigned long long)size);
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return size;
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}
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static int vtoy_is_possible_blkdev(const char *name)
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{
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if (name[0] == '.')
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{
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return 0;
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}
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/* /dev/ramX */
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if (name[0] == 'r' && name[1] == 'a' && name[2] == 'm')
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{
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return 0;
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}
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/* /dev/loopX */
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if (name[0] == 'l' && name[1] == 'o' && name[2] == 'o' && name[3] == 'p')
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{
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return 0;
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}
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/* /dev/dm-X */
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if (name[0] == 'd' && name[1] == 'm' && name[2] == '-' && IS_DIGIT(name[3]))
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{
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return 0;
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}
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/* /dev/srX */
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if (name[0] == 's' && name[1] == 'r' && IS_DIGIT(name[2]))
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{
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return 0;
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}
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return 1;
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}
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static int vtoy_find_disk_by_size(unsigned long long size, char *diskname)
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{
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unsigned long long cursize = 0;
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DIR* dir = NULL;
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struct dirent* p = NULL;
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int rc = 0;
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dir = opendir("/sys/block");
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if (!dir)
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{
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return 0;
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}
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while ((p = readdir(dir)) != NULL)
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{
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if (!vtoy_is_possible_blkdev(p->d_name))
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{
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debug("disk %s is filted by name\n", p->d_name);
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continue;
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}
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cursize = vtoy_get_disk_size_in_byte(p->d_name);
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debug("disk %s size %llu\n", p->d_name, (unsigned long long)cursize);
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if (cursize == size)
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{
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sprintf(diskname, "%s", p->d_name);
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rc++;
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}
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}
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closedir(dir);
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return rc;
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}
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static int vtoy_find_disk_by_guid(ventoy_os_param *param, char *diskname)
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{
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int rc = 0;
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int count = 0;
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DIR* dir = NULL;
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struct dirent* p = NULL;
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uint8_t vtguid[16];
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uint8_t vtsig[16];
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dir = opendir("/sys/block");
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if (!dir)
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{
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return 0;
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}
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while ((p = readdir(dir)) != NULL)
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{
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if (!vtoy_is_possible_blkdev(p->d_name))
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{
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debug("disk %s is filted by name\n", p->d_name);
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continue;
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}
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memset(vtguid, 0, sizeof(vtguid));
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rc = vtoy_get_disk_guid(p->d_name, vtguid, vtsig);
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if (rc == 0 && memcmp(vtguid, param->vtoy_disk_guid, 16) == 0 &&
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memcmp(vtsig, param->vtoy_disk_signature, 4) == 0)
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{
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sprintf(diskname, "%s", p->d_name);
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count++;
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}
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}
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closedir(dir);
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return count;
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}
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static int vtoy_printf_iso_path(ventoy_os_param *param)
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{
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printf("%s\n", param->vtoy_img_path);
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return 0;
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}
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static int vtoy_check_device(ventoy_os_param *param, const char *device)
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{
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unsigned long long size;
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uint8_t vtguid[16] = {0};
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uint8_t vtsig[4] = {0};
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debug("vtoy_check_device for <%s>\n", device);
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size = vtoy_get_disk_size_in_byte(device);
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vtoy_get_disk_guid(device, vtguid, vtsig);
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debug("param->vtoy_disk_size=%llu size=%llu\n",
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(unsigned long long)param->vtoy_disk_size, (unsigned long long)size);
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if (memcmp(vtguid, param->vtoy_disk_guid, 16) == 0 &&
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memcmp(vtsig, param->vtoy_disk_signature, 4) == 0)
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{
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debug("<%s> is right ventoy disk\n", device);
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return 0;
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}
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else
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{
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debug("<%s> is NOT right ventoy disk\n", device);
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return 1;
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}
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}
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static int vtoy_print_os_param(ventoy_os_param *param, char *diskname)
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{
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int fd, size;
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int cnt = 0;
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char *path = param->vtoy_img_path;
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const char *fs;
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char diskpath[256] = {0};
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char sizebuf[64] = {0};
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cnt = vtoy_find_disk_by_size(param->vtoy_disk_size, diskname);
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debug("find disk by size %llu, cnt=%d...\n", (unsigned long long)param->vtoy_disk_size, cnt);
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if (1 == cnt)
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{
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if (vtoy_check_device(param, diskname) != 0)
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{
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cnt = 0;
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}
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}
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else
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{
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cnt = vtoy_find_disk_by_guid(param, diskname);
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debug("find disk by guid cnt=%d...\n", cnt);
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}
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if (param->vtoy_disk_part_type < ventoy_fs_max)
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{
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fs = g_ventoy_fs[param->vtoy_disk_part_type];
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}
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else
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{
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fs = "unknown";
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}
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if (1 == cnt)
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{
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if (strstr(diskname, "nvme") || strstr(diskname, "mmc") || strstr(diskname, "nbd"))
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{
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snprintf(diskpath, sizeof(diskpath) - 1, "/sys/class/block/%sp2/size", diskname);
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}
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else
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{
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snprintf(diskpath, sizeof(diskpath) - 1, "/sys/class/block/%s2/size", diskname);
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}
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if (access(diskpath, F_OK) >= 0)
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{
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debug("get part size from sysfs for %s\n", diskpath);
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fd = open(diskpath, O_RDONLY | O_BINARY);
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if (fd >= 0)
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{
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read(fd, sizebuf, sizeof(sizebuf));
|
|
size = (int)strtoull(sizebuf, NULL, 10);
|
|
close(fd);
|
|
if ((size != (64 * 1024)) && (size != (8 * 1024)))
|
|
{
|
|
debug("sizebuf=<%s> size=%d\n", sizebuf, size);
|
|
return 1;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
debug("%s not exist \n", diskpath);
|
|
}
|
|
|
|
printf("/dev/%s#%s#%s\n", diskname, fs, path);
|
|
return 0;
|
|
}
|
|
else
|
|
{
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Find disk and image path from ventoy runtime data.
|
|
* By default data is read from phymem(legacy bios) or efivar(UEFI), if -f is input, data is read from file.
|
|
*
|
|
* -f datafile os param data file.
|
|
* -c /dev/xxx check ventoy disk
|
|
* -v be verbose
|
|
* -l also print image disk location
|
|
*/
|
|
int vtoydump_main(int argc, char **argv)
|
|
{
|
|
int rc;
|
|
int ch;
|
|
int print_path = 0;
|
|
char filename[256] = {0};
|
|
char diskname[256] = {0};
|
|
char device[64] = {0};
|
|
ventoy_os_param *param = NULL;
|
|
|
|
while ((ch = getopt(argc, argv, "c:f:p:v::")) != -1)
|
|
{
|
|
if (ch == 'f')
|
|
{
|
|
strncpy(filename, optarg, sizeof(filename) - 1);
|
|
}
|
|
else if (ch == 'v')
|
|
{
|
|
verbose = 1;
|
|
}
|
|
else if (ch == 'c')
|
|
{
|
|
strncpy(device, optarg, sizeof(device) - 1);
|
|
}
|
|
else if (ch == 'p')
|
|
{
|
|
print_path = 1;
|
|
strncpy(filename, optarg, sizeof(filename) - 1);
|
|
}
|
|
else
|
|
{
|
|
fprintf(stderr, "Usage: %s -f datafile [ -v ] \n", argv[0]);
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
if (filename[0] == 0)
|
|
{
|
|
fprintf(stderr, "Usage: %s -f datafile [ -v ] \n", argv[0]);
|
|
return 1;
|
|
}
|
|
|
|
param = malloc(sizeof(ventoy_os_param));
|
|
if (NULL == param)
|
|
{
|
|
fprintf(stderr, "failed to alloc memory with size %d error %d\n",
|
|
(int)sizeof(ventoy_os_param), errno);
|
|
return 1;
|
|
}
|
|
|
|
memset(param, 0, sizeof(ventoy_os_param));
|
|
|
|
debug("get os pararm from file %s\n", filename);
|
|
rc = vtoy_os_param_from_file(filename, param);
|
|
if (rc)
|
|
{
|
|
debug("ventoy os param not found %d %d\n", rc, ENOENT);
|
|
if (ENOENT == rc)
|
|
{
|
|
debug("now try with file %s\n", "/ventoy/ventoy_os_param");
|
|
rc = vtoy_os_param_from_file("/ventoy/ventoy_os_param", param);
|
|
if (rc)
|
|
{
|
|
goto end;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
goto end;
|
|
}
|
|
}
|
|
|
|
if (verbose)
|
|
{
|
|
vtoy_dump_os_param(param);
|
|
}
|
|
|
|
if (print_path)
|
|
{
|
|
rc = vtoy_printf_iso_path(param);
|
|
}
|
|
else if (device[0])
|
|
{
|
|
rc = vtoy_check_device(param, device);
|
|
}
|
|
else
|
|
{
|
|
// print os param, you can change the output format in the function
|
|
rc = vtoy_print_os_param(param, diskname);
|
|
}
|
|
|
|
end:
|
|
if (param)
|
|
{
|
|
free(param);
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
// wrapper main
|
|
#ifndef BUILD_VTOY_TOOL
|
|
int main(int argc, char **argv)
|
|
{
|
|
return vtoydump_main(argc, argv);
|
|
}
|
|
#endif
|
|
|