package/base-files/files/lib/upgrade/nand.sh

   1 # Copyright (C) 2014 OpenWrt.org
   2 #
   3
   4 . /lib/functions.sh
   5
   6 # 'kernel' partition or UBI volume on NAND contains the kernel
   7 CI_KERNPART="${CI_KERNPART:-kernel}"
   8
   9 # 'ubi' partition on NAND contains UBI
  10 CI_UBIPART="${CI_UBIPART:-ubi}"
  11
  12 # 'rootfs' UBI volume on NAND contains the rootfs
  13 CI_ROOTPART="${CI_ROOTPART:-rootfs}"
  14
  15 ubi_mknod() {
  16         local dir="$1"
  17         local dev="/dev/$(basename $dir)"
  18
  19         [ -e "$dev" ] && return 0
  20
  21         local devid="$(cat $dir/dev)"
  22         local major="${devid%%:*}"
  23         local minor="${devid##*:}"
  24         mknod "$dev" c $major $minor
  25 }
  26
  27 nand_find_volume() {
  28         local ubidevdir ubivoldir
  29         ubidevdir="/sys/devices/virtual/ubi/$1"
  30         [ ! -d "$ubidevdir" ] && return 1
  31         for ubivoldir in $ubidevdir/${1}_*; do
  32                 [ ! -d "$ubivoldir" ] && continue
  33                 if [ "$( cat $ubivoldir/name )" = "$2" ]; then
  34                         basename $ubivoldir
  35                         ubi_mknod "$ubivoldir"
  36                         return 0
  37                 fi
  38         done
  39 }
  40
  41 nand_find_ubi() {
  42         local ubidevdir ubidev mtdnum
  43         mtdnum="$( find_mtd_index $1 )"
  44         [ ! "$mtdnum" ] && return 1
  45         for ubidevdir in /sys/devices/virtual/ubi/ubi*; do
  46                 [ ! -d "$ubidevdir" ] && continue
  47                 cmtdnum="$( cat $ubidevdir/mtd_num )"
  48                 [ ! "$mtdnum" ] && continue
  49                 if [ "$mtdnum" = "$cmtdnum" ]; then
  50                         ubidev=$( basename $ubidevdir )
  51                         ubi_mknod "$ubidevdir"
  52                         echo $ubidev
  53                         return 0
  54                 fi
  55         done
  56 }
  57
  58 nand_get_magic_long() {
  59         dd if="$1" skip=$2 bs=4 count=1 2>/dev/null | hexdump -v -n 4 -e '1/1 "%02x"'
  60 }
  61
  62 get_magic_long_tar() {
  63         ( tar xf $1 $2 -O | dd bs=4 count=1 | hexdump -v -n 4 -e '1/1 "%02x"') 2> /dev/null
  64 }
  65
  66 identify_magic() {
  67         local magic=$1
  68         case "$magic" in
  69                 "55424923")
  70                         echo "ubi"
  71                         ;;
  72                 "31181006")
  73                         echo "ubifs"
  74                         ;;
  75                 "68737173")
  76                         echo "squashfs"
  77                         ;;
  78                 "d00dfeed")
  79                         echo "fit"
  80                         ;;
  81                 "4349"*)
  82                         echo "combined"
  83                         ;;
  84                 *)
  85                         echo "unknown $magic"
  86                         ;;
  87         esac
  88 }
  89
  90
  91 identify() {
  92         identify_magic $(nand_get_magic_long "$1" "${2:-0}")
  93 }
  94
  95 identify_tar() {
  96         identify_magic $(get_magic_long_tar "$1" "$2")
  97 }
  98
  99 nand_restore_config() {
 100         sync
 101         local ubidev=$( nand_find_ubi $CI_UBIPART )
 102         local ubivol="$( nand_find_volume $ubidev rootfs_data )"
 103         [ ! "$ubivol" ] &&
 104                 ubivol="$( nand_find_volume $ubidev $CI_ROOTPART )"
 105         mkdir /tmp/new_root
 106         if ! mount -t ubifs /dev/$ubivol /tmp/new_root; then
 107                 echo "mounting ubifs $ubivol failed"
 108                 rmdir /tmp/new_root
 109                 return 1
 110         fi
 111         mv "$1" "/tmp/new_root/$BACKUP_FILE"
 112         umount /tmp/new_root
 113         sync
 114         rmdir /tmp/new_root
 115 }
 116
 117 nand_remove_ubiblock() {
 118         local ubivol=$1
 119         local ubiblk=ubiblock${ubivol:3}
 120         if [ -e /dev/$ubiblk ]; then
 121                 echo "removing $ubiblk"
 122                 if ! ubiblock -r /dev/$ubivol; then
 123                         echo "cannot remove $ubiblk"
 124                         return 1
 125                 fi
 126         fi
 127 }
 128
 129 nand_upgrade_prepare_ubi() {
 130         local rootfs_length="$1"
 131         local rootfs_type="$2"
 132         local rootfs_data_max="$(fw_printenv -n rootfs_data_max 2>/dev/null)"
 133         [ -n "$rootfs_data_max" ] && rootfs_data_max=$((rootfs_data_max))
 134
 135         local kernel_length="$3"
 136         local has_env="${4:-0}"
 137
 138         [ -n "$rootfs_length" -o -n "$kernel_length" ] || return 1
 139
 140         local mtdnum="$( find_mtd_index "$CI_UBIPART" )"
 141         if [ ! "$mtdnum" ]; then
 142                 echo "cannot find ubi mtd partition $CI_UBIPART"
 143                 return 1
 144         fi
 145
 146         local ubidev="$( nand_find_ubi "$CI_UBIPART" )"
 147         if [ ! "$ubidev" ]; then
 148                 ubiattach -m "$mtdnum"
 149                 sync
 150                 ubidev="$( nand_find_ubi "$CI_UBIPART" )"
 151
 152                 if [ ! "$ubidev" ]; then
 153                         ubiformat /dev/mtd$mtdnum -y
 154                         ubiattach -m "$mtdnum"
 155                         sync
 156                         ubidev="$( nand_find_ubi "$CI_UBIPART" )"
 157
 158                         if [ ! "$ubidev" ]; then
 159                                 echo "cannot attach ubi mtd partition $CI_UBIPART"
 160                                 return 1
 161                         fi
 162
 163                         if [ "$has_env" -gt 0 ]; then
 164                                 ubimkvol /dev/$ubidev -n 0 -N ubootenv -s 1MiB
 165                                 ubimkvol /dev/$ubidev -n 1 -N ubootenv2 -s 1MiB
 166                         fi
 167                 fi
 168         fi
 169
 170         local kern_ubivol="$( nand_find_volume $ubidev $CI_KERNPART )"
 171         local root_ubivol="$( nand_find_volume $ubidev $CI_ROOTPART )"
 172         local data_ubivol="$( nand_find_volume $ubidev rootfs_data )"
 173         [ "$root_ubivol" = "$kern_ubivol" ] && root_ubivol=
 174
 175         # remove ubiblocks
 176         [ "$kern_ubivol" ] && { nand_remove_ubiblock $kern_ubivol || return 1; }
 177         [ "$root_ubivol" ] && { nand_remove_ubiblock $root_ubivol || return 1; }
 178         [ "$data_ubivol" ] && { nand_remove_ubiblock $data_ubivol || return 1; }
 179
 180         # kill volumes
 181         [ "$kern_ubivol" ] && ubirmvol /dev/$ubidev -N $CI_KERNPART || :
 182         [ "$root_ubivol" ] && ubirmvol /dev/$ubidev -N $CI_ROOTPART || :
 183         [ "$data_ubivol" ] && ubirmvol /dev/$ubidev -N rootfs_data || :
 184
 185         # create kernel vol
 186         if [ -n "$kernel_length" ]; then
 187                 if ! ubimkvol /dev/$ubidev -N $CI_KERNPART -s $kernel_length; then
 188                         echo "cannot create kernel volume"
 189                         return 1;
 190                 fi
 191         fi
 192
 193         # create rootfs vol
 194         if [ -n "$rootfs_length" ]; then
 195                 local rootfs_size_param
 196                 if [ "$rootfs_type" = "ubifs" ]; then
 197                         rootfs_size_param="-m"
 198                 else
 199                         rootfs_size_param="-s $rootfs_length"
 200                 fi
 201                 if ! ubimkvol /dev/$ubidev -N $CI_ROOTPART $rootfs_size_param; then
 202                         echo "cannot create rootfs volume"
 203                         return 1;
 204                 fi
 205         fi
 206
 207         # create rootfs_data vol for non-ubifs rootfs
 208         if [ "$rootfs_type" != "ubifs" ]; then
 209                 local rootfs_data_size_param="-m"
 210                 if [ -n "$rootfs_data_max" ]; then
 211                         rootfs_data_size_param="-s $rootfs_data_max"
 212                 fi
 213                 if ! ubimkvol /dev/$ubidev -N rootfs_data $rootfs_data_size_param; then
 214                         if ! ubimkvol /dev/$ubidev -N rootfs_data -m; then
 215                                 echo "cannot initialize rootfs_data volume"
 216                                 return 1
 217                         fi
 218                 fi
 219         fi
 220         sync
 221         return 0
 222 }
 223
 224 nand_do_upgrade_success() {
 225         local conf_tar="/tmp/sysupgrade.tgz"
 226
 227         sync
 228         [ -f "$conf_tar" ] && nand_restore_config "$conf_tar"
 229         echo "sysupgrade successful"
 230         umount -a
 231         reboot -f
 232 }
 233
 234 # Flash the UBI image to MTD partition
 235 nand_upgrade_ubinized() {
 236         local ubi_file="$1"
 237         local mtdnum="$(find_mtd_index "$CI_UBIPART")"
 238
 239         [ ! "$mtdnum" ] && {
 240                 CI_UBIPART="rootfs"
 241                 mtdnum="$(find_mtd_index "$CI_UBIPART")"
 242         }
 243
 244         if [ ! "$mtdnum" ]; then
 245                 echo "cannot find mtd device $CI_UBIPART"
 246                 umount -a
 247                 reboot -f
 248         fi
 249
 250         local mtddev="/dev/mtd${mtdnum}"
 251         ubidetach -p "${mtddev}" || true
 252         sync
 253         ubiformat "${mtddev}" -y -f "${ubi_file}"
 254         ubiattach -p "${mtddev}"
 255         nand_do_upgrade_success
 256 }
 257
 258 # Write the UBIFS image to UBI volume
 259 nand_upgrade_ubifs() {
 260         local rootfs_length=$( (cat $1 | wc -c) 2> /dev/null)
 261
 262         nand_upgrade_prepare_ubi "$rootfs_length" "ubifs" "" ""
 263
 264         local ubidev="$( nand_find_ubi "$CI_UBIPART" )"
 265         local root_ubivol="$(nand_find_volume $ubidev $CI_ROOTPART)"
 266         ubiupdatevol /dev/$root_ubivol -s $rootfs_length $1
 267
 268         nand_do_upgrade_success
 269 }
 270
 271 nand_upgrade_fit() {
 272         local fit_file="$1"
 273         local fit_length="$(wc -c < "$fit_file")"
 274
 275         nand_upgrade_prepare_ubi "" "" "$fit_length" "1"
 276
 277         local fit_ubidev="$(nand_find_ubi "$CI_UBIPART")"
 278         local fit_ubivol="$(nand_find_volume $fit_ubidev "$CI_KERNPART")"
 279         ubiupdatevol /dev/$fit_ubivol -s $fit_length $fit_file
 280
 281         nand_do_upgrade_success
 282 }
 283
 284 nand_upgrade_tar() {
 285         local tar_file="$1"
 286         local kernel_mtd="$(find_mtd_index $CI_KERNPART)"
 287
 288         local board_dir=$(tar tf "$tar_file" | grep -m 1 '^sysupgrade-.*/$')
 289         board_dir=${board_dir%/}
 290
 291         local kernel_length=$( (tar xf "$tar_file" ${board_dir}/kernel -O | wc -c) 2> /dev/null)
 292         local has_rootfs=0
 293         local rootfs_length
 294         local rootfs_type
 295
 296         tar tf "$tar_file" ${board_dir}/root 1>/dev/null 2>/dev/null && has_rootfs=1
 297         [ "$has_rootfs" = "1" ] && {
 298                 rootfs_length=$( (tar xf "$tar_file" ${board_dir}/root -O | wc -c) 2> /dev/null)
 299                 rootfs_type="$(identify_tar "$tar_file" ${board_dir}/root)"
 300         }
 301
 302         local has_kernel=1
 303         local has_env=0
 304
 305         [ "$kernel_length" != 0 -a -n "$kernel_mtd" ] && {
 306                 mtd erase $CI_KERNPART
 307         }
 308         [ "$kernel_length" = 0 -o ! -z "$kernel_mtd" ] && has_kernel=
 309         [ "$CI_KERNPART" = "none" ] && has_kernel=
 310
 311         nand_upgrade_prepare_ubi "$rootfs_length" "$rootfs_type" "${has_kernel:+$kernel_length}" "$has_env"
 312
 313         local ubidev="$( nand_find_ubi "$CI_UBIPART" )"
 314         [ "$has_rootfs" = "1" ] && {
 315                 local root_ubivol="$( nand_find_volume $ubidev $CI_ROOTPART )"
 316                 tar xf "$tar_file" ${board_dir}/root -O | \
 317                         ubiupdatevol /dev/$root_ubivol -s $rootfs_length -
 318         }
 319
 320         [ "$kernel_length" != 0 -a -n "$kernel_mtd" ] && {
 321                 tar xf "$tar_file" ${board_dir}/kernel -O | \
 322                         mtd -n write - $CI_KERNPART
 323         }
 324         [ "$has_kernel" = "1" ] && {
 325                 local kern_ubivol="$( nand_find_volume $ubidev $CI_KERNPART )"
 326                 tar xf "$tar_file" ${board_dir}/kernel -O | \
 327                         ubiupdatevol /dev/$kern_ubivol -s $kernel_length -
 328         }
 329         nand_do_upgrade_success
 330 }
 331
 332 # Recognize type of passed file and start the upgrade process
 333 nand_do_upgrade() {
 334         local file_type=$(identify $1)
 335
 336         [ ! "$(find_mtd_index "$CI_UBIPART")" ] && CI_UBIPART="rootfs"
 337
 338         case "$file_type" in
 339                 "fit")          nand_upgrade_fit $1;;
 340                 "ubi")          nand_upgrade_ubinized $1;;
 341                 "ubifs")        nand_upgrade_ubifs $1;;
 342                 *)              nand_upgrade_tar $1;;
 343         esac
 344 }
 345
 346 # Check if passed file is a valid one for NAND sysupgrade. Currently it accepts
 347 # 3 types of files:
 348 # 1) UBI - should contain an ubinized image, header is checked for the proper
 349 #    MAGIC
 350 # 2) UBIFS - should contain UBIFS partition that will replace "rootfs" volume,
 351 #    header is checked for the proper MAGIC
 352 # 3) TAR - archive has to include "sysupgrade-BOARD" directory with a non-empty
 353 #    "CONTROL" file (at this point its content isn't verified)
 354 #
 355 # You usually want to call this function in platform_check_image.
 356 #
 357 # $(1): board name, used in case of passing TAR file
 358 # $(2): file to be checked
 359 nand_do_platform_check() {
 360         local board_name="$1"
 361         local tar_file="$2"
 362         local control_length=$( (tar xf $tar_file sysupgrade-$board_name/CONTROL -O | wc -c) 2> /dev/null)
 363         local file_type="$(identify $2)"
 364
 365         [ "$control_length" = 0 -a "$file_type" != "ubi" -a "$file_type" != "ubifs" -a "$file_type" != "fit" ] && {
 366                 echo "Invalid sysupgrade file."
 367                 return 1
 368         }
 369
 370         return 0
 371 }