miscutils/ubi_tools.c

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