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Ventoy/LinuxGUI/Ventoy2Disk/Core/ventoy_disk.c

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/******************************************************************************
* ventoy_disk.c ---- ventoy disk
* Copyright (c) 2021, longpanda <admin@ventoy.net>
*
* 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 3 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <linux/fs.h>
#include <dirent.h>
#include <time.h>
#include <ventoy_define.h>
#include <ventoy_disk.h>
#include <ventoy_util.h>
#include <fat_filelib.h>
int g_disk_num = 0;
static int g_fatlib_media_fd = 0;
static uint64_t g_fatlib_media_offset = 0;
ventoy_disk *g_disk_list = NULL;
static const char *g_ventoy_dev_type_str[VTOY_DEVICE_END] =
{
"unknown", "scsi", "USB", "ide", "dac960",
"cpqarray", "file", "ataraid", "i2o",
"ubd", "dasd", "viodasd", "sx8", "dm",
"xvd", "sd/mmc", "virtblk", "aoe",
"md", "loopback", "nvme", "brd", "pmem"
};
static const char * ventoy_get_dev_type_name(ventoy_dev_type type)
{
return (type < VTOY_DEVICE_END) ? g_ventoy_dev_type_str[type] : "unknown";
}
static int ventoy_check_blk_major(int major, const char *type)
{
int flag = 0;
int valid = 0;
int devnum = 0;
int len = 0;
char line[64];
char *pos = NULL;
FILE *fp = NULL;
fp = fopen("/proc/devices", "r");
if (!fp)
{
return 0;
}
len = (int)strlen(type);
while (fgets(line, sizeof(line), fp))
{
if (flag)
{
pos = strchr(line, ' ');
if (pos)
{
devnum = (int)strtol(line, NULL, 10);
if (devnum == major)
{
if (strncmp(pos + 1, type, len) == 0)
{
valid = 1;
}
break;
}
}
}
else if (strncmp(line, "Block devices:", 14) == 0)
{
flag = 1;
}
}
fclose(fp);
return valid;
}
static int ventoy_get_disk_devnum(const char *name, int *major, int* minor)
{
int rc;
char *pos;
char devnum[16] = {0};
rc = ventoy_get_sys_file_line(devnum, sizeof(devnum), "/sys/block/%s/dev", name);
if (rc)
{
return 1;
}
pos = strstr(devnum, ":");
if (!pos)
{
return 1;
}
*major = (int)strtol(devnum, NULL, 10);
*minor = (int)strtol(pos + 1, NULL, 10);
return 0;
}
static ventoy_dev_type ventoy_get_dev_type(const char *name, int major, int minor)
{
int rc;
char syspath[128];
char dstpath[256];
memset(syspath, 0, sizeof(syspath));
memset(dstpath, 0, sizeof(dstpath));
scnprintf(syspath, "/sys/block/%s", name);
rc = readlink(syspath, dstpath, sizeof(dstpath) - 1);
if (rc > 0 && strstr(dstpath, "/usb"))
{
return VTOY_DEVICE_USB;
}
if (SCSI_BLK_MAJOR(major) && (minor % 0x10 == 0))
{
return VTOY_DEVICE_SCSI;
}
else if (IDE_BLK_MAJOR(major) && (minor % 0x40 == 0))
{
return VTOY_DEVICE_IDE;
}
else if (major == DAC960_MAJOR && (minor % 0x8 == 0))
{
return VTOY_DEVICE_DAC960;
}
else if (major == ATARAID_MAJOR && (minor % 0x10 == 0))
{
return VTOY_DEVICE_ATARAID;
}
else if (major == AOE_MAJOR && (minor % 0x10 == 0))
{
return VTOY_DEVICE_AOE;
}
else if (major == DASD_MAJOR && (minor % 0x4 == 0))
{
return VTOY_DEVICE_DASD;
}
else if (major == VIODASD_MAJOR && (minor % 0x8 == 0))
{
return VTOY_DEVICE_VIODASD;
}
else if (SX8_BLK_MAJOR(major) && (minor % 0x20 == 0))
{
return VTOY_DEVICE_SX8;
}
else if (I2O_BLK_MAJOR(major) && (minor % 0x10 == 0))
{
return VTOY_DEVICE_I2O;
}
else if (CPQARRAY_BLK_MAJOR(major) && (minor % 0x10 == 0))
{
return VTOY_DEVICE_CPQARRAY;
}
else if (UBD_MAJOR == major && (minor % 0x10 == 0))
{
return VTOY_DEVICE_UBD;
}
else if (XVD_MAJOR == major && (minor % 0x10 == 0))
{
return VTOY_DEVICE_XVD;
}
else if (SDMMC_MAJOR == major && (minor % 0x8 == 0))
{
return VTOY_DEVICE_SDMMC;
}
else if (ventoy_check_blk_major(major, "virtblk"))
{
return VTOY_DEVICE_VIRTBLK;
}
else if (major == LOOP_MAJOR)
{
return VTOY_DEVICE_LOOP;
}
else if (major == MD_MAJOR)
{
return VTOY_DEVICE_MD;
}
else if (major == RAM_MAJOR)
{
return VTOY_DEVICE_RAM;
}
else if (strstr(name, "nvme") && ventoy_check_blk_major(major, "blkext"))
{
return VTOY_DEVICE_NVME;
}
else if (strstr(name, "pmem") && ventoy_check_blk_major(major, "blkext"))
{
return VTOY_DEVICE_PMEM;
}
return VTOY_DEVICE_END;
}
static int ventoy_is_possible_blkdev(const char *name)
{
if (name[0] == '.')
{
return 0;
}
/* /dev/ramX */
if (name[0] == 'r' && name[1] == 'a' && name[2] == 'm')
{
return 0;
}
/* /dev/zramX */
if (name[0] == 'z' && name[1] == 'r' && name[2] == 'a' && name[3] == 'm')
{
return 0;
}
/* /dev/loopX */
if (name[0] == 'l' && name[1] == 'o' && name[2] == 'o' && name[3] == 'p')
{
return 0;
}
/* /dev/dm-X */
if (name[0] == 'd' && name[1] == 'm' && name[2] == '-' && isdigit(name[3]))
{
return 0;
}
/* /dev/srX */
if (name[0] == 's' && name[1] == 'r' && isdigit(name[2]))
{
return 0;
}
return 1;
}
int ventoy_is_disk_4k_native(const char *disk)
{
int fd;
int rc = 0;
int logsector = 0;
int physector = 0;
char diskpath[256] = {0};
snprintf(diskpath, sizeof(diskpath) - 1, "/dev/%s", disk);
fd = open(diskpath, O_RDONLY | O_BINARY);
if (fd >= 0)
{
ioctl(fd, BLKSSZGET, &logsector);
ioctl(fd, BLKPBSZGET, &physector);
if (logsector == 4096 && physector == 4096)
{
rc = 1;
}
close(fd);
}
vdebug("is 4k native disk <%s> <%d>\n", disk, rc);
return rc;
}
uint64_t ventoy_get_disk_size_in_byte(const char *disk)
{
int fd;
int rc;
unsigned long long size = 0;
char diskpath[256] = {0};
char sizebuf[64] = {0};
// Try 1: get size from sysfs
snprintf(diskpath, sizeof(diskpath) - 1, "/sys/block/%s/size", disk);
if (access(diskpath, F_OK) >= 0)
{
vdebug("get disk size from sysfs for %s\n", disk);
fd = open(diskpath, O_RDONLY | O_BINARY);
if (fd >= 0)
{
read(fd, sizebuf, sizeof(sizebuf));
size = strtoull(sizebuf, NULL, 10);
close(fd);
return (uint64_t)(size * 512);
}
}
else
{
vdebug("%s not exist \n", diskpath);
}
// Try 2: get size from ioctl
snprintf(diskpath, sizeof(diskpath) - 1, "/dev/%s", disk);
fd = open(diskpath, O_RDONLY);
if (fd >= 0)
{
vdebug("get disk size from ioctl for %s\n", disk);
rc = ioctl(fd, BLKGETSIZE64, &size);
if (rc == -1)
{
size = 0;
vdebug("failed to ioctl %d\n", rc);
}
close(fd);
}
else
{
vdebug("failed to open %s %d\n", diskpath, errno);
}
vdebug("disk %s size %llu bytes\n", disk, size);
return size;
}
int ventoy_get_disk_vendor(const char *name, char *vendorbuf, int bufsize)
{
return ventoy_get_sys_file_line(vendorbuf, bufsize, "/sys/block/%s/device/vendor", name);
}
int ventoy_get_disk_model(const char *name, char *modelbuf, int bufsize)
{
return ventoy_get_sys_file_line(modelbuf, bufsize, "/sys/block/%s/device/model", name);
}
static int fatlib_media_sector_read(uint32 sector, uint8 *buffer, uint32 sector_count)
{
lseek(g_fatlib_media_fd, (sector + g_fatlib_media_offset) * 512ULL, SEEK_SET);
read(g_fatlib_media_fd, buffer, sector_count * 512);
return 1;
}
static int fatlib_is_secure_boot_enable(void)
{
void *flfile = NULL;
flfile = fl_fopen("/EFI/BOOT/grubx64_real.efi", "rb");
if (flfile)
{
vlog("/EFI/BOOT/grubx64_real.efi find, secure boot in enabled\n");
fl_fclose(flfile);
return 1;
}
else
{
vlog("/EFI/BOOT/grubx64_real.efi not exist\n");
}
return 0;
}
static int fatlib_get_ventoy_version(char *verbuf, int bufsize)
{
int rc = 1;
int size = 0;
char *buf = NULL;
char *pos = NULL;
char *end = NULL;
void *flfile = NULL;
flfile = fl_fopen("/grub/grub.cfg", "rb");
if (flfile)
{
fl_fseek(flfile, 0, SEEK_END);
size = (int)fl_ftell(flfile);
fl_fseek(flfile, 0, SEEK_SET);
buf = malloc(size + 1);
if (buf)
{
fl_fread(buf, 1, size, flfile);
buf[size] = 0;
pos = strstr(buf, "VENTOY_VERSION=");
if (pos)
{
pos += strlen("VENTOY_VERSION=");
if (*pos == '"')
{
pos++;
}
end = pos;
while (*end != 0 && *end != '"' && *end != '\r' && *end != '\n')
{
end++;
}
*end = 0;
snprintf(verbuf, bufsize - 1, "%s", pos);
rc = 0;
}
free(buf);
}
fl_fclose(flfile);
}
else
{
vdebug("No grub.cfg found\n");
}
return rc;
}
int ventoy_get_vtoy_data(ventoy_disk *info, int *ppartstyle)
{
int i;
int fd;
int len;
int rc = 1;
int ret = 1;
int part_style;
uint64_t part1_start_sector;
uint64_t part1_sector_count;
uint64_t part2_start_sector;
uint64_t part2_sector_count;
uint64_t preserved_space;
char name[64] = {0};
disk_ventoy_data *vtoy = NULL;
VTOY_GPT_INFO *gpt = NULL;
vtoy = &(info->vtoydata);
gpt = &(vtoy->gptinfo);
memset(vtoy, 0, sizeof(disk_ventoy_data));
vdebug("ventoy_get_vtoy_data %s\n", info->disk_path);
if (info->size_in_byte < (2 * VTOYEFI_PART_BYTES))
{
vdebug("disk %s is too small %llu\n", info->disk_path, (_ull)info->size_in_byte);
return 1;
}
fd = open(info->disk_path, O_RDONLY | O_BINARY);
if (fd < 0)
{
vdebug("failed to open %s %d\n", info->disk_path, errno);
return 1;
}
len = (int)read(fd, &(vtoy->gptinfo), sizeof(VTOY_GPT_INFO));
if (len != sizeof(VTOY_GPT_INFO))
{
vdebug("failed to read %s %d\n", info->disk_path, errno);
goto end;
}
if (gpt->MBR.Byte55 != 0x55 || gpt->MBR.ByteAA != 0xAA)
{
vdebug("Invalid mbr magic 0x%x 0x%x\n", gpt->MBR.Byte55, gpt->MBR.ByteAA);
goto end;
}
if (gpt->MBR.PartTbl[0].FsFlag == 0xEE && strncmp(gpt->Head.Signature, "EFI PART", 8) == 0)
{
part_style = GPT_PART_STYLE;
if (ppartstyle)
{
*ppartstyle = part_style;
}
if (gpt->PartTbl[0].StartLBA == 0 || gpt->PartTbl[1].StartLBA == 0)
{
vdebug("NO ventoy efi part layout <%llu %llu>\n",
(_ull)gpt->PartTbl[0].StartLBA,
(_ull)gpt->PartTbl[1].StartLBA);
goto end;
}
for (i = 0; i < 36; i++)
{
name[i] = (char)(gpt->PartTbl[1].Name[i]);
}
if (strcmp(name, "VTOYEFI"))
{
vdebug("Invalid efi part2 name <%s>\n", name);
goto end;
}
part1_start_sector = gpt->PartTbl[0].StartLBA;
part1_sector_count = gpt->PartTbl[0].LastLBA - part1_start_sector + 1;
part2_start_sector = gpt->PartTbl[1].StartLBA;
part2_sector_count = gpt->PartTbl[1].LastLBA - part2_start_sector + 1;
preserved_space = info->size_in_byte - (part2_start_sector + part2_sector_count + 33) * 512;
}
else
{
part_style = MBR_PART_STYLE;
if (ppartstyle)
{
*ppartstyle = part_style;
}
part1_start_sector = gpt->MBR.PartTbl[0].StartSectorId;
part1_sector_count = gpt->MBR.PartTbl[0].SectorCount;
part2_start_sector = gpt->MBR.PartTbl[1].StartSectorId;
part2_sector_count = gpt->MBR.PartTbl[1].SectorCount;
preserved_space = info->size_in_byte - (part2_start_sector + part2_sector_count) * 512;
}
if (part1_start_sector != VTOYIMG_PART_START_SECTOR ||
part2_sector_count != VTOYEFI_PART_SECTORS ||
(part1_start_sector + part1_sector_count) != part2_start_sector)
{
vdebug("Not valid ventoy partition layout [%llu %llu] [%llu %llu]\n",
part1_start_sector, part1_sector_count, part2_start_sector, part2_sector_count);
goto end;
}
vdebug("ventoy partition layout check OK: [%llu %llu] [%llu %llu]\n",
part1_start_sector, part1_sector_count, part2_start_sector, part2_sector_count);
vtoy->ventoy_valid = 1;
vdebug("now check secure boot for %s ...\n", info->disk_path);
g_fatlib_media_fd = fd;
g_fatlib_media_offset = part2_start_sector;
fl_init();
if (0 == fl_attach_media(fatlib_media_sector_read, NULL))
{
ret = fatlib_get_ventoy_version(vtoy->ventoy_ver, sizeof(vtoy->ventoy_ver));
if (ret == 0 && vtoy->ventoy_ver[0])
{
vtoy->secure_boot_flag = fatlib_is_secure_boot_enable();
}
else
{
vdebug("fatlib_get_ventoy_version failed %d\n", ret);
}
}
else
{
vdebug("fl_attach_media failed\n");
}
fl_shutdown();
g_fatlib_media_fd = -1;
g_fatlib_media_offset = 0;
if (vtoy->ventoy_ver[0] == 0)
{
vtoy->ventoy_ver[0] = '?';
}
if (0 == vtoy->ventoy_valid)
{
goto end;
}
lseek(fd, 2040 * 512, SEEK_SET);
read(fd, vtoy->rsvdata, sizeof(vtoy->rsvdata));
vtoy->preserved_space = preserved_space;
vtoy->partition_style = part_style;
vtoy->part2_start_sector = part2_start_sector;
rc = 0;
end:
vtoy_safe_close_fd(fd);
return rc;
}
int ventoy_get_disk_info(const char *name, ventoy_disk *info)
{
char vendor[64] = {0};
char model[128] = {0};
vdebug("get disk info %s\n", name);
strlcpy(info->disk_name, name);
scnprintf(info->disk_path, "/dev/%s", name);
if (strstr(name, "nvme") || strstr(name, "mmc") || strstr(name, "nbd"))
{
scnprintf(info->part1_name, "%sp1", name);
scnprintf(info->part1_path, "/dev/%sp1", name);
scnprintf(info->part2_name, "%sp2", name);
scnprintf(info->part2_path, "/dev/%sp2", name);
}
else
{
scnprintf(info->part1_name, "%s1", name);
scnprintf(info->part1_path, "/dev/%s1", name);
scnprintf(info->part2_name, "%s2", name);
scnprintf(info->part2_path, "/dev/%s2", name);
}
info->is4kn = ventoy_is_disk_4k_native(name);
info->size_in_byte = ventoy_get_disk_size_in_byte(name);
ventoy_get_disk_devnum(name, &info->major, &info->minor);
info->type = ventoy_get_dev_type(name, info->major, info->minor);
ventoy_get_disk_vendor(name, vendor, sizeof(vendor));
ventoy_get_disk_model(name, model, sizeof(model));
scnprintf(info->human_readable_size, "%llu GB", (_ull)ventoy_get_human_readable_gb(info->size_in_byte));
scnprintf(info->disk_model, "%s %s (%s)", vendor, model, ventoy_get_dev_type_name(info->type));
ventoy_get_vtoy_data(info, &(info->partstyle));
vdebug("disk:<%s %d:%d> model:<%s> size:%llu (%s)\n",
info->disk_path, info->major, info->minor, info->disk_model, info->size_in_byte, info->human_readable_size);
if (info->vtoydata.ventoy_valid)
{
vdebug("%s Ventoy:<%s> %s secureboot:%d preserve:%llu\n", info->disk_path, info->vtoydata.ventoy_ver,
info->vtoydata.partition_style == MBR_PART_STYLE ? "MBR" : "GPT",
info->vtoydata.secure_boot_flag, (_ull)(info->vtoydata.preserved_space));
}
else
{
vdebug("%s NO Ventoy detected\n", info->disk_path);
}
return 0;
}
static int ventoy_disk_compare(const ventoy_disk *disk1, const ventoy_disk *disk2)
{
if (disk1->type == VTOY_DEVICE_USB && disk2->type == VTOY_DEVICE_USB)
{
return strcmp(disk1->disk_name, disk2->disk_name);
}
else if (disk1->type == VTOY_DEVICE_USB)
{
return -1;
}
else if (disk2->type == VTOY_DEVICE_USB)
{
return 1;
}
else
{
return strcmp(disk1->disk_name, disk2->disk_name);
}
}
static int ventoy_disk_sort(void)
{
int i, j;
ventoy_disk *tmp;
tmp = malloc(sizeof(ventoy_disk));
if (!tmp)
{
return 1;
}
for (i = 0; i < g_disk_num; i++)
for (j = i + 1; j < g_disk_num; j++)
{
if (ventoy_disk_compare(g_disk_list + i, g_disk_list + j) > 0)
{
memcpy(tmp, g_disk_list + i, sizeof(ventoy_disk));
memcpy(g_disk_list + i, g_disk_list + j, sizeof(ventoy_disk));
memcpy(g_disk_list + j, tmp, sizeof(ventoy_disk));
}
}
free(tmp);
return 0;
}
int ventoy_disk_enumerate_all(void)
{
int rc = 0;
DIR* dir = NULL;
struct dirent* p = NULL;
vdebug("ventoy_disk_enumerate_all\n");
dir = opendir("/sys/block");
if (!dir)
{
vlog("Failed to open /sys/block %d\n", errno);
return 1;
}
while (((p = readdir(dir)) != NULL) && (g_disk_num < MAX_DISK_NUM))
{
if (ventoy_is_possible_blkdev(p->d_name))
{
memset(g_disk_list + g_disk_num, 0, sizeof(ventoy_disk));
if (0 == ventoy_get_disk_info(p->d_name, g_disk_list + g_disk_num))
{
g_disk_num++;
}
}
}
closedir(dir);
ventoy_disk_sort();
return rc;
}
void ventoy_disk_dump(ventoy_disk *cur)
{
if (cur->vtoydata.ventoy_valid)
{
vdebug("%s [%s] %s\tVentoy: %s %s secureboot:%d preserve:%llu\n",
cur->disk_path, cur->human_readable_size, cur->disk_model,
cur->vtoydata.ventoy_ver, cur->vtoydata.partition_style == MBR_PART_STYLE ? "MBR" : "GPT",
cur->vtoydata.secure_boot_flag, (_ull)(cur->vtoydata.preserved_space));
}
else
{
vdebug("%s [%s] %s\tVentoy: NA\n", cur->disk_path, cur->human_readable_size, cur->disk_model);
}
}
void ventoy_disk_dump_all(void)
{
int i;
vdebug("============= DISK DUMP ============\n");
for (i = 0; i < g_disk_num; i++)
{
ventoy_disk_dump(g_disk_list + i);
}
}
int ventoy_disk_install(ventoy_disk *disk, void *efipartimg)
{
return 0;
}
int ventoy_disk_init(void)
{
g_disk_list = malloc(sizeof(ventoy_disk) * MAX_DISK_NUM);
ventoy_disk_enumerate_all();
ventoy_disk_dump_all();
return 0;
}
void ventoy_disk_exit(void)
{
check_free(g_disk_list);
g_disk_list = NULL;
g_disk_num = 0;
}
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