1 | /* Ported to busybox from mtd-utils.
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2 | *
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3 | * Licensed under GPLv2, see file LICENSE in this source tree.
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4 | */
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5 |
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6 | //config:config UBIATTACH
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7 | //config: bool "ubiattach"
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8 | //config: default y
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9 | //config: select PLATFORM_LINUX
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10 | //config: help
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11 | //config: Attach MTD device to an UBI device.
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12 | //config:
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13 | //config:config UBIDETACH
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14 | //config: bool "ubidetach"
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15 | //config: default y
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16 | //config: select PLATFORM_LINUX
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17 | //config: help
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18 | //config: Detach MTD device from an UBI device.
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19 | //config:
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20 | //config:config UBIMKVOL
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21 | //config: bool "ubimkvol"
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22 | //config: default y
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23 | //config: select PLATFORM_LINUX
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24 | //config: help
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25 | //config: Create a UBI volume.
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26 | //config:
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27 | //config:config UBIRMVOL
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28 | //config: bool "ubirmvol"
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29 | //config: default y
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30 | //config: select PLATFORM_LINUX
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31 | //config: help
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32 | //config: Delete a UBI volume.
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33 | //config:
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34 | //config:config UBIRSVOL
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35 | //config: bool "ubirsvol"
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36 | //config: default y
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37 | //config: select PLATFORM_LINUX
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38 | //config: help
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39 | //config: Resize a UBI volume.
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40 | //config:
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41 | //config:config UBIUPDATEVOL
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42 | //config: bool "ubiupdatevol"
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43 | //config: default y
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44 | //config: select PLATFORM_LINUX
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45 | //config: help
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46 | //config: Update a UBI volume.
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47 |
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48 | //applet:IF_UBIATTACH(APPLET_ODDNAME(ubiattach, ubi_tools, BB_DIR_USR_SBIN, BB_SUID_DROP, ubiattach))
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49 | //applet:IF_UBIDETACH(APPLET_ODDNAME(ubidetach, ubi_tools, BB_DIR_USR_SBIN, BB_SUID_DROP, ubidetach))
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50 | //applet:IF_UBIMKVOL(APPLET_ODDNAME(ubimkvol, ubi_tools, BB_DIR_USR_SBIN, BB_SUID_DROP, ubimkvol))
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51 | //applet:IF_UBIRMVOL(APPLET_ODDNAME(ubirmvol, ubi_tools, BB_DIR_USR_SBIN, BB_SUID_DROP, ubirmvol))
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52 | //applet:IF_UBIRSVOL(APPLET_ODDNAME(ubirsvol, ubi_tools, BB_DIR_USR_SBIN, BB_SUID_DROP, ubirsvol))
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53 | //applet:IF_UBIUPDATEVOL(APPLET_ODDNAME(ubiupdatevol, ubi_tools, BB_DIR_USR_SBIN, BB_SUID_DROP, ubiupdatevol))
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54 |
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55 | //kbuild:lib-$(CONFIG_UBIATTACH) += ubi_tools.o
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56 | //kbuild:lib-$(CONFIG_UBIDETACH) += ubi_tools.o
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57 | //kbuild:lib-$(CONFIG_UBIMKVOL) += ubi_tools.o
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58 | //kbuild:lib-$(CONFIG_UBIRMVOL) += ubi_tools.o
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59 | //kbuild:lib-$(CONFIG_UBIRSVOL) += ubi_tools.o
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60 | //kbuild:lib-$(CONFIG_UBIUPDATEVOL) += ubi_tools.o
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61 |
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62 | #include "libbb.h"
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63 | /* Some versions of kernel have broken headers, need this hack */
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64 | #ifndef __packed
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65 | # define __packed __attribute__((packed))
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66 | #endif
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67 | #include <mtd/ubi-user.h>
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68 |
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69 | #define do_attach (ENABLE_UBIATTACH && applet_name[3] == 'a')
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70 | #define do_detach (ENABLE_UBIDETACH && applet_name[3] == 'd')
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71 | #define do_mkvol (ENABLE_UBIMKVOL && applet_name[3] == 'm')
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72 | #define do_rmvol (ENABLE_UBIRMVOL && applet_name[4] == 'm')
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73 | #define do_rsvol (ENABLE_UBIRSVOL && applet_name[4] == 's')
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74 | #define do_update (ENABLE_UBIUPDATEVOL && applet_name[3] == 'u')
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75 |
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76 | static unsigned get_num_from_file(const char *path, unsigned max, const char *errmsg)
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77 | {
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78 | char buf[sizeof(long long)*3];
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79 | unsigned long long num;
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80 |
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81 | if (open_read_close(path, buf, sizeof(buf)) < 0)
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82 | bb_perror_msg_and_die(errmsg, path);
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83 | /* It can be \n terminated, xatoull won't work well */
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84 | if (sscanf(buf, "%llu", &num) != 1 || num > max)
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85 | bb_error_msg_and_die(errmsg, path);
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86 | return num;
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87 | }
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88 |
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89 | /* To prevent malloc(1G) accidents */
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90 | #define MAX_SANE_ERASEBLOCK (16*1024*1024)
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91 |
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92 | int ubi_tools_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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93 | int ubi_tools_main(int argc UNUSED_PARAM, char **argv)
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94 | {
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95 | static const struct suffix_mult size_suffixes[] = {
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96 | { "KiB", 1024 },
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97 | { "MiB", 1024*1024 },
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98 | { "GiB", 1024*1024*1024 },
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99 | { "", 0 }
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100 | };
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101 |
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102 | unsigned opts;
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103 | char *ubi_ctrl;
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104 | int fd;
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105 | int mtd_num;
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106 | int dev_num = UBI_DEV_NUM_AUTO;
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107 | int vol_id = UBI_VOL_NUM_AUTO;
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108 | int vid_hdr_offset = 0;
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109 | char *vol_name;
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110 | unsigned long long size_bytes = size_bytes; /* for compiler */
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111 | char *size_bytes_str;
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112 | int alignment = 1;
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113 | char *type;
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114 | union {
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115 | struct ubi_attach_req attach_req;
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116 | struct ubi_mkvol_req mkvol_req;
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117 | struct ubi_rsvol_req rsvol_req;
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118 | } req_structs;
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119 | #define attach_req req_structs.attach_req
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120 | #define mkvol_req req_structs.mkvol_req
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121 | #define rsvol_req req_structs.rsvol_req
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122 | char path[sizeof("/sys/class/ubi/ubi%d_%d/usable_eb_size")
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123 | + 2 * sizeof(int)*3 + /*just in case:*/ 16];
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124 | #define path_sys_class_ubi_ubi (path + sizeof("/sys/class/ubi/ubi")-1)
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125 |
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126 | strcpy(path, "/sys/class/ubi/ubi");
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127 | memset(&req_structs, 0, sizeof(req_structs));
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128 |
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129 | #define OPTION_m (1 << 0)
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130 | #define OPTION_d (1 << 1)
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131 | #define OPTION_n (1 << 2)
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132 | #define OPTION_N (1 << 3)
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133 | #define OPTION_s (1 << 4)
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134 | #define OPTION_a (1 << 5)
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135 | #define OPTION_t (1 << 6)
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136 | if (do_mkvol) {
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137 | opt_complementary = "-1:d+:n+:a+:O+";
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138 | opts = getopt32(argv, "md:n:N:s:a:t:O:",
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139 | &dev_num, &vol_id,
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140 | &vol_name, &size_bytes_str, &alignment, &type,
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141 | &vid_hdr_offset
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142 | );
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143 | } else
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144 | if (do_update) {
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145 | opt_complementary = "-1";
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146 | opts = getopt32(argv, "s:at", &size_bytes_str);
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147 | opts *= OPTION_s;
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148 | } else {
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149 | opt_complementary = "-1:m+:d+:n+:a+";
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150 | opts = getopt32(argv, "m:d:n:N:s:a:t:",
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151 | &mtd_num, &dev_num, &vol_id,
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152 | &vol_name, &size_bytes_str, &alignment, &type
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153 | );
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154 | }
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155 |
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156 | if (opts & OPTION_s)
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157 | size_bytes = xatoull_sfx(size_bytes_str, size_suffixes);
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158 | argv += optind;
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159 | ubi_ctrl = *argv++;
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160 |
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161 | fd = xopen(ubi_ctrl, O_RDWR);
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162 | //xfstat(fd, &st, ubi_ctrl);
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163 | //if (!S_ISCHR(st.st_mode))
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164 | // bb_error_msg_and_die("%s: not a char device", ubi_ctrl);
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165 |
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166 | //usage:#define ubiattach_trivial_usage
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167 | //usage: "-m MTD_NUM [-d UBI_NUM] [-O VID_HDR_OFF] UBI_CTRL_DEV"
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168 | //usage:#define ubiattach_full_usage "\n\n"
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169 | //usage: "Attach MTD device to UBI\n"
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170 | //usage: "\n -m MTD_NUM MTD device number to attach"
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171 | //usage: "\n -d UBI_NUM UBI device number to assign"
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172 | //usage: "\n -O VID_HDR_OFF VID header offset"
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173 | if (do_attach) {
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174 | if (!(opts & OPTION_m))
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175 | bb_error_msg_and_die("%s device not specified", "MTD");
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176 |
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177 | attach_req.mtd_num = mtd_num;
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178 | attach_req.ubi_num = dev_num;
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179 | attach_req.vid_hdr_offset = vid_hdr_offset;
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180 |
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181 | xioctl(fd, UBI_IOCATT, &attach_req);
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182 | } else
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183 |
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184 | //usage:#define ubidetach_trivial_usage
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185 | //usage: "-d UBI_NUM UBI_CTRL_DEV"
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186 | //usage:#define ubidetach_full_usage "\n\n"
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187 | //usage: "Detach MTD device from UBI\n"
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188 | //usage: "\n -d UBI_NUM UBI device number"
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189 | if (do_detach) {
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190 | if (!(opts & OPTION_d))
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191 | bb_error_msg_and_die("%s device not specified", "UBI");
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192 |
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193 | /* FIXME? kernel expects int32_t* here: */
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194 | xioctl(fd, UBI_IOCDET, &dev_num);
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195 | } else
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196 |
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197 | //usage:#define ubimkvol_trivial_usage
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198 | //usage: "-N NAME [-s SIZE | -m] UBI_DEVICE"
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199 | //usage:#define ubimkvol_full_usage "\n\n"
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200 | //usage: "Create UBI volume\n"
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201 | //usage: "\n -a ALIGNMENT Volume alignment (default 1)"
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202 | //usage: "\n -m Set volume size to maximum available"
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203 | //usage: "\n -n VOLID Volume ID. If not specified,"
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204 | //usage: "\n assigned automatically"
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205 | //usage: "\n -N NAME Volume name"
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206 | //usage: "\n -s SIZE Size in bytes"
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207 | //usage: "\n -t TYPE Volume type (static|dynamic)"
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208 | if (do_mkvol) {
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209 | if (opts & OPTION_m) {
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210 | unsigned leb_avail;
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211 | unsigned leb_size;
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212 | unsigned num;
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213 | char *p;
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214 |
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215 | num = ubi_devnum_from_devname(ubi_ctrl);
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216 | p = path_sys_class_ubi_ubi + sprintf(path_sys_class_ubi_ubi, "%u/", num);
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217 |
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218 | strcpy(p, "avail_eraseblocks");
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219 | leb_avail = get_num_from_file(path, UINT_MAX, "Can't get available eraseblocks from '%s'");
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220 |
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221 | strcpy(p, "eraseblock_size");
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222 | leb_size = get_num_from_file(path, MAX_SANE_ERASEBLOCK, "Can't get eraseblock size from '%s'");
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223 |
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224 | size_bytes = leb_avail * (unsigned long long)leb_size;
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225 | //if (size_bytes <= 0)
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226 | // bb_error_msg_and_die("%s invalid maximum size calculated", "UBI");
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227 | } else
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228 | if (!(opts & OPTION_s))
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229 | bb_error_msg_and_die("size not specified");
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230 |
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231 | if (!(opts & OPTION_N))
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232 | bb_error_msg_and_die("name not specified");
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233 |
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234 | mkvol_req.vol_id = vol_id;
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235 | mkvol_req.vol_type = UBI_DYNAMIC_VOLUME;
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236 | if ((opts & OPTION_t) && type[0] == 's')
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237 | mkvol_req.vol_type = UBI_STATIC_VOLUME;
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238 | mkvol_req.alignment = alignment;
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239 | mkvol_req.bytes = size_bytes; /* signed int64_t */
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240 | strncpy(mkvol_req.name, vol_name, UBI_MAX_VOLUME_NAME);
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241 | mkvol_req.name_len = strlen(vol_name);
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242 | if (mkvol_req.name_len > UBI_MAX_VOLUME_NAME)
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243 | bb_error_msg_and_die("volume name too long: '%s'", vol_name);
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244 |
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245 | xioctl(fd, UBI_IOCMKVOL, &mkvol_req);
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246 | } else
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247 |
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248 | //usage:#define ubirmvol_trivial_usage
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249 | //usage: "-n VOLID / -N VOLNAME UBI_DEVICE"
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250 | //usage:#define ubirmvol_full_usage "\n\n"
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251 | //usage: "Remove UBI volume\n"
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252 | //usage: "\n -n VOLID Volume ID"
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253 | //usage: "\n -N VOLNAME Volume name"
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254 | if (do_rmvol) {
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255 | if (!(opts & (OPTION_n|OPTION_N)))
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256 | bb_error_msg_and_die("volume id not specified");
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257 |
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258 | if (opts & OPTION_N) {
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259 | unsigned num = ubi_devnum_from_devname(ubi_ctrl);
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260 | vol_id = ubi_get_volid_by_name(num, vol_name);
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261 | }
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262 |
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263 | if (sizeof(vol_id) != 4) {
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264 | /* kernel expects int32_t* in this ioctl */
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265 | int32_t t = vol_id;
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266 | xioctl(fd, UBI_IOCRMVOL, &t);
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267 | } else {
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268 | xioctl(fd, UBI_IOCRMVOL, &vol_id);
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269 | }
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270 | } else
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271 |
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272 | //usage:#define ubirsvol_trivial_usage
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273 | //usage: "-n VOLID -s SIZE UBI_DEVICE"
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274 | //usage:#define ubirsvol_full_usage "\n\n"
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275 | //usage: "Resize UBI volume\n"
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276 | //usage: "\n -n VOLID Volume ID"
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277 | //usage: "\n -s SIZE Size in bytes"
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278 | if (do_rsvol) {
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279 | if (!(opts & OPTION_s))
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280 | bb_error_msg_and_die("size not specified");
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281 | if (!(opts & OPTION_n))
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282 | bb_error_msg_and_die("volume id not specified");
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283 |
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284 | rsvol_req.bytes = size_bytes; /* signed int64_t */
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285 | rsvol_req.vol_id = vol_id;
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286 |
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287 | xioctl(fd, UBI_IOCRSVOL, &rsvol_req);
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288 | } else
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289 |
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290 | //usage:#define ubiupdatevol_trivial_usage
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291 | //usage: "[-t | [-s SIZE] IMG_FILE] UBI_DEVICE"
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292 | //usage:#define ubiupdatevol_full_usage "\n\n"
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293 | //usage: "Update UBI volume\n"
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294 | //usage: "\n -t Truncate to zero size"
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295 | //usage: "\n -s SIZE Size in bytes to resize to"
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296 | if (do_update) {
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297 | int64_t bytes64;
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298 |
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299 | if (opts & OPTION_t) {
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300 | /* truncate the volume by starting an update for size 0 */
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301 | bytes64 = 0;
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302 | /* this ioctl expects int64_t* parameter */
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303 | xioctl(fd, UBI_IOCVOLUP, &bytes64);
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304 | }
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305 | else {
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306 | struct stat st;
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307 | unsigned ubinum, volnum;
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308 | unsigned leb_size;
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309 | ssize_t len;
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310 | char *input_data;
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311 |
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312 | /* Assume that device is in normal format. */
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313 | /* Removes need for scanning sysfs tree as full libubi does. */
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314 | if (sscanf(ubi_ctrl, "/dev/ubi%u_%u", &ubinum, &volnum) != 2)
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315 | bb_error_msg_and_die("wrong format of UBI device name");
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316 |
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317 | sprintf(path_sys_class_ubi_ubi, "%u_%u/usable_eb_size", ubinum, volnum);
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318 | leb_size = get_num_from_file(path, MAX_SANE_ERASEBLOCK, "Can't get usable eraseblock size from '%s'");
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319 |
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320 | if (!(opts & OPTION_s)) {
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321 | if (!*argv)
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322 | bb_show_usage();
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323 | xmove_fd(xopen(*argv, O_RDONLY), STDIN_FILENO);
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324 | xfstat(STDIN_FILENO, &st, *argv);
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325 | size_bytes = st.st_size;
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326 | }
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327 |
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328 | bytes64 = size_bytes;
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329 | /* this ioctl expects signed int64_t* parameter */
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330 | xioctl(fd, UBI_IOCVOLUP, &bytes64);
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331 |
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332 | input_data = xmalloc(leb_size);
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333 | while ((len = full_read(STDIN_FILENO, input_data, leb_size)) > 0) {
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334 | xwrite(fd, input_data, len);
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335 | }
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336 | if (len < 0)
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337 | bb_perror_msg_and_die("UBI volume update failed");
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338 | }
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339 | }
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340 |
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341 | if (ENABLE_FEATURE_CLEAN_UP)
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342 | close(fd);
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343 |
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344 | return EXIT_SUCCESS;
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345 | }
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