target/linux/ar71xx/base-files/lib/upgrade/platform.sh

   1 #
   2 # Copyright (C) 2011 OpenWrt.org
   3 #
   4
   5 . /lib/functions/system.sh
   6 . /lib/ar71xx.sh
   7
   8 PART_NAME=firmware
   9 RAMFS_COPY_DATA=/lib/ar71xx.sh
  10 [ -x /usr/sbin/nandwrite ] && RAMFS_COPY_BIN=/usr/sbin/nandwrite
  11
  12 CI_BLKSZ=65536
  13 CI_LDADR=0x80060000
  14
  15 PLATFORM_DO_UPGRADE_COMBINED_SEPARATE_MTD=0
  16
  17 platform_find_partitions() {
  18         local first dev size erasesize name
  19         while read dev size erasesize name; do
  20                 name=${name#'"'}; name=${name%'"'}
  21                 case "$name" in
  22                         vmlinux.bin.l7|vmlinux|kernel|linux|linux.bin|rootfs|filesystem)
  23                                 if [ -z "$first" ]; then
  24                                         first="$name"
  25                                 else
  26                                         echo "$erasesize:$first:$name"
  27                                         break
  28                                 fi
  29                         ;;
  30                 esac
  31         done < /proc/mtd
  32 }
  33
  34 platform_find_kernelpart() {
  35         local part
  36         for part in "${1%:*}" "${1#*:}"; do
  37                 case "$part" in
  38                         vmlinux.bin.l7|vmlinux|kernel|linux|linux.bin)
  39                                 echo "$part"
  40                                 break
  41                         ;;
  42                 esac
  43         done
  44 }
  45
  46 platform_find_rootfspart() {
  47         local part
  48         for part in "${1%:*}" "${1#*:}"; do
  49                 [ "$part" != "$2" ] && echo "$part" && break
  50         done
  51 }
  52
  53 platform_do_upgrade_combined() {
  54         local partitions=$(platform_find_partitions)
  55         local kernelpart=$(platform_find_kernelpart "${partitions#*:}")
  56         local erase_size=$((0x${partitions%%:*})); partitions="${partitions#*:}"
  57         local kern_length=0x$(dd if="$1" bs=2 skip=1 count=4 2>/dev/null)
  58         local kern_blocks=$(($kern_length / $CI_BLKSZ))
  59         local root_blocks=$((0x$(dd if="$1" bs=2 skip=5 count=4 2>/dev/null) / $CI_BLKSZ))
  60
  61         if [ -n "$partitions" ] && [ -n "$kernelpart" ] && \
  62            [ ${kern_blocks:-0} -gt 0 ] && \
  63            [ ${root_blocks:-0} -gt 0 ] && \
  64            [ ${erase_size:-0} -gt 0 ];
  65         then
  66                 local rootfspart=$(platform_find_rootfspart "$partitions" "$kernelpart")
  67                 local append=""
  68                 [ -f "$CONF_TAR" -a "$SAVE_CONFIG" -eq 1 ] && append="-j $CONF_TAR"
  69
  70                 if [ "$PLATFORM_DO_UPGRADE_COMBINED_SEPARATE_MTD" -ne 1 ]; then
  71                     ( dd if="$1" bs=$CI_BLKSZ skip=1 count=$kern_blocks 2>/dev/null; \
  72                       dd if="$1" bs=$CI_BLKSZ skip=$((1+$kern_blocks)) count=$root_blocks 2>/dev/null ) | \
  73                             mtd -r $append -F$kernelpart:$kern_length:$CI_LDADR,rootfs write - $partitions
  74                 elif [ -n "$rootfspart" ]; then
  75                     dd if="$1" bs=$CI_BLKSZ skip=1 count=$kern_blocks 2>/dev/null | \
  76                             mtd write - $kernelpart
  77                     dd if="$1" bs=$CI_BLKSZ skip=$((1+$kern_blocks)) count=$root_blocks 2>/dev/null | \
  78                             mtd -r $append write - $rootfspart
  79                 fi
  80         fi
  81         PLATFORM_DO_UPGRADE_COMBINED_SEPARATE_MTD=0
  82 }
  83
  84 tplink_get_image_hwid() {
  85         get_image "$@" | dd bs=4 count=1 skip=16 2>/dev/null | hexdump -v -n 4 -e '1/1 "%02x"'
  86 }
  87
  88 tplink_get_image_mid() {
  89         get_image "$@" | dd bs=4 count=1 skip=17 2>/dev/null | hexdump -v -n 4 -e '1/1 "%02x"'
  90 }
  91
  92 tplink_get_image_boot_size() {
  93         get_image "$@" | dd bs=4 count=1 skip=37 2>/dev/null | hexdump -v -n 4 -e '1/1 "%02x"'
  94 }
  95
  96 tplink_pharos_check_image() {
  97         local magic_long="$(get_magic_long "$1")"
  98         [ "$magic_long" != "7f454c46" ] && {
  99                 echo "Invalid image magic '$magic_long'"
 100                 return 1
 101         }
 102
 103         local model_string="$(tplink_pharos_get_model_string)"
 104         local line
 105
 106         # Here $1 is given to dd directly instead of get_image as otherwise the skip
 107         # will take almost a second (as dd can't seek then)
 108         #
 109         # This will fail if the image isn't local, but that's fine: as the
 110         # read loop won't be executed at all, it will return true, so the image
 111         # is accepted (loading the first 1.5M of a remote image for this check seems
 112         # a bit extreme)
 113         dd if="$1" bs=1 skip=1511432 count=1024 2>/dev/null | while read line; do
 114                 [ "$line" == "$model_string" ] && break
 115         done || {
 116                 echo "Unsupported image (model not in support-list)"
 117                 return 1
 118         }
 119
 120         return 0
 121 }
 122
 123 seama_get_type_magic() {
 124         get_image "$@" | dd bs=1 count=4 skip=53 2>/dev/null | hexdump -v -n 4 -e '1/1 "%02x"'
 125 }
 126
 127 wrgg_get_image_magic() {
 128         get_image "$@" | dd bs=4 count=1 skip=8 2>/dev/null | hexdump -v -n 4 -e '1/1 "%02x"'
 129 }
 130
 131 cybertan_get_image_magic() {
 132         get_image "$@" | dd bs=8 count=1 skip=0  2>/dev/null | hexdump -v -n 8 -e '1/1 "%02x"'
 133 }
 134
 135 cybertan_check_image() {
 136         local magic="$(cybertan_get_image_magic "$1")"
 137         local fw_magic="$(cybertan_get_hw_magic)"
 138
 139         [ "$fw_magic" != "$magic" ] && {
 140                 echo "Invalid image, ID mismatch, got:$magic, but need:$fw_magic"
 141                 return 1
 142         }
 143
 144         return 0
 145 }
 146
 147 platform_do_upgrade_compex() {
 148         local fw_file=$1
 149         local fw_part=$PART_NAME
 150         local fw_mtd=$(find_mtd_part $fw_part)
 151         local fw_length=0x$(dd if="$fw_file" bs=2 skip=1 count=4 2>/dev/null)
 152         local fw_blocks=$(($fw_length / 65536))
 153
 154         if [ -n "$fw_mtd" ] &&  [ ${fw_blocks:-0} -gt 0 ]; then
 155                 local append=""
 156                 [ -f "$CONF_TAR" -a "$SAVE_CONFIG" -eq 1 ] && append="-j $CONF_TAR"
 157
 158                 sync
 159                 dd if="$fw_file" bs=64k skip=1 count=$fw_blocks 2>/dev/null | \
 160                         mtd $append write - "$fw_part"
 161         fi
 162 }
 163
 164 alfa_check_image() {
 165         local magic_long="$(get_magic_long "$1")"
 166         local fw_part_size=$(mtd_get_part_size firmware)
 167
 168         case "$magic_long" in
 169         "27051956")
 170                 [ "$fw_part_size" != "16318464" ] && {
 171                         echo "Invalid image magic \"$magic_long\" for $fw_part_size bytes"
 172                         return 1
 173                 }
 174                 ;;
 175         "68737173")
 176                 [ "$fw_part_size" != "7929856" ] && {
 177                         echo "Invalid image magic \"$magic_long\" for $fw_part_size bytes"
 178                         return 1
 179                 }
 180                 ;;
 181         esac
 182
 183         return 0
 184 }
 185
 186 platform_nand_board_name() {
 187         local board=$(ar71xx_board_name)
 188
 189         case "$board" in
 190         rb*) echo "routerboard";;
 191         *) echo "$board";;
 192         esac
 193 }
 194
 195 platform_check_image() {
 196         local board=$(ar71xx_board_name)
 197         local magic="$(get_magic_word "$1")"
 198         local magic_long="$(get_magic_long "$1")"
 199
 200         [ "$#" -gt 1 ] && return 1
 201
 202         case "$board" in
 203         airgatewaypro|\
 204         airgateway|\
 205         airrouter|\
 206         ap132|\
 207         ap90q|\
 208         archer-c59-v1|\
 209         archer-c60-v1|\
 210         bullet-m|\
 211         c-55|\
 212         carambola2|\
 213         cf-e316n-v2|\
 214         cf-e320n-v2|\
 215         cf-e380ac-v1|\
 216         cf-e380ac-v2|\
 217         cf-e520n|\
 218         cf-e530n|\
 219         cpe830|\
 220         cpe870|\
 221         dgl-5500-a1|\
 222         dhp-1565-a1|\
 223         dir-505-a1|\
 224         dir-600-a1|\
 225         dir-615-c1|\
 226         dir-615-e1|\
 227         dir-615-e4|\
 228         dir-615-i1|\
 229         dir-825-c1|\
 230         dir-835-a1|\
 231         dlan-hotspot|\
 232         dlan-pro-1200-ac|\
 233         dlan-pro-500-wp|\
 234         dr531|\
 235         dragino2|\
 236         ebr-2310-c1|\
 237         epg5000|\
 238         esr1750|\
 239         esr900|\
 240         ew-dorin-router|\
 241         ew-dorin|\
 242         gl-ar150|\
 243         gl-ar300m|\
 244         gl-ar300|\
 245         gl-domino|\
 246         gl-mifi|\
 247         hiwifi-hc6361|\
 248         hornet-ub-x2|\
 249         jwap230|\
 250         loco-m-xw|\
 251         mzk-w04nu|\
 252         mzk-w300nh|\
 253         nanostation-m-xw|\
 254         nanostation-m|\
 255         nbg460n_550n_550nh|\
 256         pqi-air-pen|\
 257         rocket-m-ti|\
 258         rocket-m-xw|\
 259         rocket-m|\
 260         rw2458n|\
 261         sc1750|\
 262         sc300m|\
 263         sc450|\
 264         sr3200|\
 265         tew-632brp|\
 266         tew-712br|\
 267         tew-732br|\
 268         tew-823dru|\
 269         unifi-outdoor|\
 270         unifiac-lite|\
 271         unifiac-pro|\
 272         unifi|\
 273         weio|\
 274         whr-g301n|\
 275         whr-hp-g300n|\
 276         whr-hp-gn|\
 277         wlae-ag300n|\
 278         wndap360|\
 279         wpj342|\
 280         wpj344|\
 281         wpj531|\
 282         wrt400n|\
 283         wrtnode2q|\
 284         wzr-450hp2|\
 285         wzr-hp-ag300h|\
 286         wzr-hp-g300nh2|\
 287         wzr-hp-g300nh|\
 288         wzr-hp-g450h|\
 289         xd3200)
 290                 [ "$magic" != "2705" ] && {
 291                         echo "Invalid image type."
 292                         return 1
 293                 }
 294
 295                 return 0
 296                 ;;
 297         alfa-ap96|\
 298         alfa-nx|\
 299         ap121-mini|\
 300         ap121|\
 301         ap135-020|\
 302         ap136-010|\
 303         ap136-020|\
 304         ap147-010|\
 305         ap152|\
 306         ap96|\
 307         arduino-yun|\
 308         bhr-4grv2|\
 309         bxu2000n-2-a1|\
 310         db120|\
 311         dr344|\
 312         dw33d|\
 313         f9k1115v2|\
 314         hornet-ub|\
 315         mr12|\
 316         mr16|\
 317         wpj558|\
 318         zbt-we1526|\
 319         zcn-1523h-2|\
 320         zcn-1523h-5)
 321                 [ "$magic_long" != "68737173" -a "$magic_long" != "19852003" ] && {
 322                         echo "Invalid image type."
 323                         return 1
 324                 }
 325
 326                 return 0
 327                 ;;
 328         all0258n|\
 329         all0315n|\
 330         cap324|\
 331         cap4200ag|\
 332         cr3000|\
 333         cr5000)
 334                 platform_check_image_allnet "$1" && return 0
 335                 return 1
 336                 ;;
 337         all0305|\
 338         eap300v2|\
 339         eap7660d|\
 340         ja76pf2|\
 341         ja76pf|\
 342         jwap003|\
 343         ls-sr71|\
 344         pb42|\
 345         pb44|\
 346         rb-941-2nd|\
 347         rb-951ui-2nd|\
 348         rb-mapl-2nd|\
 349         routerstation-pro|\
 350         routerstation|\
 351         wp543|\
 352         wpe72)
 353                 [ "$magic" != "4349" ] && {
 354                         echo "Invalid image. Use *-sysupgrade.bin files on this board"
 355                         return 1
 356                 }
 357
 358                 local md5_img=$(dd if="$1" bs=2 skip=9 count=16 2>/dev/null)
 359                 local md5_chk=$(dd if="$1" bs=$CI_BLKSZ skip=1 2>/dev/null | md5sum -); md5_chk="${md5_chk%% *}"
 360
 361                 if [ -n "$md5_img" -a -n "$md5_chk" ] && [ "$md5_img" = "$md5_chk" ]; then
 362                         return 0
 363                 else
 364                         echo "Invalid image. Contents do not match checksum (image:$md5_img calculated:$md5_chk)"
 365                         return 1
 366                 fi
 367
 368                 return 0
 369                 ;;
 370         antminer-s1|\
 371         antminer-s3|\
 372         antrouter-r1|\
 373         archer-c5|\
 374         archer-c7|\
 375         el-m150|\
 376         el-mini|\
 377         gl-inet|\
 378         mc-mac1200r|\
 379         minibox-v1|\
 380         omy-g1|\
 381         omy-x1|\
 382         onion-omega|\
 383         oolite|\
 384         re450|\
 385         smart-300|\
 386         som9331|\
 387         tellstick-znet-lite|\
 388         tl-mr10u|\
 389         tl-mr11u|\
 390         tl-mr12u|\
 391         tl-mr13u|\
 392         tl-mr3020|\
 393         tl-mr3040-v2|\
 394         tl-mr3040|\
 395         tl-mr3220-v2|\
 396         tl-mr3220|\
 397         tl-mr3420-v2|\
 398         tl-mr3420|\
 399         tl-wa701nd-v2|\
 400         tl-wa7210n-v2|\
 401         tl-wa750re|\
 402         tl-wa7510n|\
 403         tl-wa801nd-v2|\
 404         tl-wa801nd-v3|\
 405         tl-wa830re-v2|\
 406         tl-wa850re|\
 407         tl-wa850re-v2|\
 408         tl-wa860re|\
 409         tl-wa901nd-v2|\
 410         tl-wa901nd-v3|\
 411         tl-wa901nd-v4|\
 412         tl-wa901nd|\
 413         tl-wdr3320-v2|\
 414         tl-wdr3500|\
 415         tl-wdr4300|\
 416         tl-wdr4900-v2|\
 417         tl-wdr6500-v2|\
 418         tl-wpa8630|\
 419         tl-wr1041n-v2|\
 420         tl-wr1043nd-v2|\
 421         tl-wr1043nd-v4|\
 422         tl-wr1043nd|\
 423         tl-wr2543n|\
 424         tl-wr703n|\
 425         tl-wr710n|\
 426         tl-wr720n-v3|\
 427         tl-wr741nd-v4|\
 428         tl-wr741nd|\
 429         tl-wr802n-v1|\
 430         tl-wr810n|\
 431         tl-wr841n-v11|\
 432         tl-wr841n-v1|\
 433         tl-wr841n-v7|\
 434         tl-wr841n-v8|\
 435         tl-wr841n-v9|\
 436         tl-wr842n-v2|\
 437         tl-wr842n-v3|\
 438         tl-wr941nd-v5|\
 439         tl-wr941nd-v6|\
 440         tl-wr940n-v4|\
 441         tl-wr941nd)
 442                 local magic_ver="0100"
 443
 444                 case "$board" in
 445                 tl-wdr6500-v2)
 446                         magic_ver="0200"
 447                         ;;
 448                 esac
 449
 450                 [ "$magic" != "$magic_ver" ] && {
 451                         echo "Invalid image type."
 452                         return 1
 453                 }
 454
 455                 local hwid
 456                 local mid
 457                 local imagehwid
 458                 local imagemid
 459
 460                 hwid=$(tplink_get_hwid)
 461                 mid=$(tplink_get_mid)
 462                 imagehwid=$(tplink_get_image_hwid "$1")
 463                 imagemid=$(tplink_get_image_mid "$1")
 464
 465                 [ "$hwid" != "$imagehwid" -o "$mid" != "$imagemid" ] && {
 466                         echo "Invalid image, hardware ID mismatch, hw:$hwid $mid image:$imagehwid $imagemid."
 467                         return 1
 468                 }
 469
 470                 local boot_size
 471
 472                 boot_size=$(tplink_get_image_boot_size "$1")
 473                 [ "$boot_size" != "00000000" ] && {
 474                         echo "Invalid image, it contains a bootloader."
 475                         return 1
 476                 }
 477
 478                 return 0
 479                 ;;
 480         bsb|\
 481         dir-825-b1|\
 482         tew-673gru)
 483                 dir825b_check_image "$1" && return 0
 484                 ;;
 485         rb*)
 486                 nand_do_platform_check routerboard $1
 487                 return $?
 488                 ;;
 489         c-60|\
 490         nbg6716|\
 491         r6100|\
 492         wndr3700v4|\
 493         wndr4300)
 494                 nand_do_platform_check $board $1
 495                 return $?
 496                 ;;
 497         cpe210|\
 498         cpe510|\
 499         eap120|\
 500         wbs210|\
 501         wbs510)
 502                 tplink_pharos_check_image "$1" && return 0
 503                 return 1
 504                 ;;
 505         a40|\
 506         a60|\
 507         mr1750v2|\
 508         mr1750|\
 509         mr600v2|\
 510         mr600|\
 511         mr900v2|\
 512         mr900|\
 513         om2p-hsv2|\
 514         om2p-hsv3|\
 515         om2p-hsv4|\
 516         om2p-hs|\
 517         om2p-lc|\
 518         om2pv2|\
 519         om2pv4|\
 520         om2p|\
 521         om5p-acv2|\
 522         om5p-ac|\
 523         om5p-an|\
 524         om5p)
 525                 platform_check_image_openmesh "$magic_long" "$1" && return 0
 526                 return 1
 527                 ;;
 528         mr18|\
 529         z1)
 530                 merakinand_do_platform_check $board $1
 531                 return $?
 532                 ;;
 533         dir-869-a1|\
 534         mynet-n600|\
 535         mynet-n750|\
 536         qihoo-c301)
 537                 [ "$magic_long" != "5ea3a417" ] && {
 538                         echo "Invalid image, bad magic: $magic_long"
 539                         return 1
 540                 }
 541
 542                 local typemagic=$(seama_get_type_magic "$1")
 543                 [ "$typemagic" != "6669726d" ] && {
 544                         echo "Invalid image, bad type: $typemagic"
 545                         return 1
 546                 }
 547
 548                 return 0
 549                 ;;
 550         e2100l|\
 551         mynet-rext|\
 552         wrt160nl)
 553                 cybertan_check_image "$1" && return 0
 554                 return 1
 555                 ;;
 556         nbg6616|\
 557         uap-pro|\
 558         unifi-outdoor-plus)
 559                 [ "$magic_long" != "19852003" ] && {
 560                         echo "Invalid image type."
 561                         return 1
 562                 }
 563
 564                 return 0
 565                 ;;
 566         tube2h)
 567                 alfa_check_image "$1" && return 0
 568                 return 1
 569                 ;;
 570         wndr3700|\
 571         wnr1000-v2|\
 572         wnr2000-v3|\
 573         wnr612-v2|\
 574         wpn824n)
 575                 local hw_magic
 576
 577                 hw_magic="$(ar71xx_get_mtd_part_magic firmware)"
 578                 [ "$magic_long" != "$hw_magic" ] && {
 579                         echo "Invalid image, hardware ID mismatch, hw:$hw_magic image:$magic_long."
 580                         return 1
 581                 }
 582
 583                 return 0
 584                 ;;
 585         wnr2000-v4)
 586                 [ "$magic_long" != "32303034" ] && {
 587                         echo "Invalid image type."
 588                         return 1
 589                 }
 590
 591                 return 0
 592                 ;;
 593         wnr2200)
 594                 [ "$magic_long" != "32323030" ] && {
 595                         echo "Invalid image type."
 596                         return 1
 597                 }
 598
 599                 return 0
 600                 ;;
 601         dap-2695-a1)
 602                 local magic=$(wrgg_get_image_magic "$1")
 603                 [ "$magic" != "21030820" ] && {
 604                         echo "Invalid image, bad type: $magic"
 605                         return 1
 606                 }
 607
 608                 return 0;
 609                 ;;
 610         esac
 611
 612         echo "Sysupgrade is not yet supported on $board."
 613         return 1
 614 }
 615
 616 platform_pre_upgrade() {
 617         local board=$(ar71xx_board_name)
 618
 619         case "$board" in
 620         rb-941-2nd|\
 621         rb-951ui-2nd|\
 622         rb-mapl-2nd)
 623                 ;;
 624         rb*|\
 625         c-60|\
 626         nbg6716|\
 627         r6100|\
 628         wndr3700v4|\
 629         wndr4300)
 630                 nand_do_upgrade "$1"
 631                 ;;
 632         mr18|\
 633         z1)
 634                 merakinand_do_upgrade "$1"
 635                 ;;
 636         esac
 637 }
 638
 639 platform_nand_pre_upgrade() {
 640         local board=$(ar71xx_board_name)
 641
 642         case "$board" in
 643         rb*)
 644                 CI_KERNPART=none
 645                 local fw_mtd=$(find_mtd_part kernel)
 646                 fw_mtd="${fw_mtd/block/}"
 647                 [ -n "$fw_mtd" ] || return
 648                 mtd erase kernel
 649                 tar xf "$1" sysupgrade-routerboard/kernel -O | nandwrite -o "$fw_mtd" -
 650                 ;;
 651         esac
 652 }
 653
 654 platform_do_upgrade() {
 655         local board=$(ar71xx_board_name)
 656
 657         case "$board" in
 658         rb-941-2nd|\
 659         rb-951ui-2nd|\
 660         rb-mapl-2nd)
 661                 PLATFORM_DO_UPGRADE_COMBINED_SEPARATE_MTD=1
 662                 platform_do_upgrade_combined "$ARGV"
 663                 ;;
 664         all0258n)
 665                 platform_do_upgrade_allnet "0x9f050000" "$ARGV"
 666                 ;;
 667         all0305|\
 668         eap7660d|\
 669         ja76pf2|\
 670         ja76pf|\
 671         jwap003|\
 672         ls-sr71|\
 673         pb42|\
 674         pb44|\
 675         routerstation-pro|\
 676         routerstation)
 677                 platform_do_upgrade_combined "$ARGV"
 678                 ;;
 679         all0315n)
 680                 platform_do_upgrade_allnet "0x9f080000" "$ARGV"
 681                 ;;
 682         cap4200ag|\
 683         eap300v2)
 684                 platform_do_upgrade_allnet "0xbf0a0000" "$ARGV"
 685                 ;;
 686         dir-825-b1|\
 687         tew-673gru)
 688                 platform_do_upgrade_dir825b "$ARGV"
 689                 ;;
 690         a40|\
 691         a60|\
 692         mr1750v2|\
 693         mr1750|\
 694         mr600v2|\
 695         mr600|\
 696         mr900v2|\
 697         mr900|\
 698         om2p-hsv2|\
 699         om2p-hsv3|\
 700         om2p-hsv4|\
 701         om2p-hs|\
 702         om2p-lc|\
 703         om2pv2|\
 704         om2pv4|\
 705         om2p|\
 706         om5p-acv2|\
 707         om5p-ac|\
 708         om5p-an|\
 709         om5p)
 710                 platform_do_upgrade_openmesh "$ARGV"
 711                 ;;
 712         uap-pro|\
 713         unifi-outdoor-plus)
 714                 MTD_CONFIG_ARGS="-s 0x180000"
 715                 default_do_upgrade "$ARGV"
 716                 ;;
 717         wp543|\
 718         wpe72)
 719                 platform_do_upgrade_compex "$ARGV"
 720                 ;;
 721         *)
 722                 default_do_upgrade "$ARGV"
 723                 ;;
 724         esac
 725 }
 726
 727 disable_watchdog() {
 728         killall watchdog
 729         ( ps | grep -v 'grep' | grep '/dev/watchdog' ) && {
 730                 echo 'Could not disable watchdog'
 731                 return 1
 732         }
 733 }
 734
 735 append sysupgrade_pre_upgrade disable_watchdog