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ipq40xx: Linksys: sysupgrade: Ensure OEM volumes are removed 

When OEM volumes are present in the [alt_]firmware partition,
sysupgrade will write a new kernel, but will fail to write
the root file system. The next boot will hang indefinitely

    Waiting for root device /dev/ubiblock0_0...

Modified ipq40xx/base-files/lib/upgrade/linksys.sh
to remove both `squashfs` and `ubifs` if found
on the target firmware partition's UBI device.

Run-tested-on: Linksys EA8300

Signed-off-by: Jeff Kletsky <git-commits@allycomm.com>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
[applied some shellcheck suggestions as well]
This commit is contained in:
Jeff Kletsky 2019-06-15 14:40:56 -07:00 committed by Christian Lamparter
parent 869ff80d31
commit 1440175f82
1 changed files with 22 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

42
target/linux/ipq40xx/base-files/lib/upgrade/linksys.sh
View File

@ -1,11 +1,10 @@
linksys_get_target_firmware() {
local cur_boot_part mtd_ubi0
cur_boot_part=$(/usr/sbin/fw_printenv -n boot_part)
if [ -z "${cur_boot_part}" ] ; then
cur_boot_part="$(/usr/sbin/fw_printenv -n boot_part)"
if [ -z "${cur_boot_part}" ]; then
mtd_ubi0=$(cat /sys/devices/virtual/ubi/ubi0/mtd_num)
case $(egrep "^mtd${mtd_ubi0}:" /proc/mtd | cut -d '"' -f 2) in
case "$(grep -E "^mtd${mtd_ubi0}:" /proc/mtd | cut -d '"' -f 2)" in
kernel|rootfs)
cur_boot_part=1
;;
@ -25,7 +24,7 @@ linksys_get_target_firmware() {
# else run bootpart2;
# fi
case $cur_boot_part in
case "$cur_boot_part" in
1)
fw_setenv -s - <<-EOF
boot_part 2
@ -55,16 +54,19 @@ linksys_get_root_magic() {
platform_do_upgrade_linksys() {
local magic_long="$(get_magic_long "$1")"
local rm_oem_fw_vols="squashfs ubifs" # from OEM [alt_]rootfs UBI
local vol
mkdir -p /var/lock
local part_label="$(linksys_get_target_firmware)"
touch /var/lock/fw_printenv.lock
if [ ! -n "$part_label" ]; then
if [ -z "$part_label" ]; then
echo "cannot find target partition"
exit 1
fi
local target_mtd=$(find_mtd_part $part_label)
local target_mtd=$(find_mtd_part "$part_label")
[ "$magic_long" = "73797375" ] && {
CI_KERNPART="$part_label"
@ -74,47 +76,47 @@ platform_do_upgrade_linksys() {
CI_UBIPART="alt_rootfs"
fi
# remove "squashfs" vol (in case we are flashing over a stock image, which is also UBI)
local mtdnum="$( find_mtd_index "$CI_UBIPART" )"
local mtdnum="$(find_mtd_index "$CI_UBIPART")"
if [ ! "$mtdnum" ]; then
echo "cannot find ubi mtd partition $CI_UBIPART"
return 1
fi
local ubidev="$( nand_find_ubi "$CI_UBIPART" )"
local ubidev="$(nand_find_ubi "$CI_UBIPART")"
if [ ! "$ubidev" ]; then
ubiattach -m "$mtdnum"
sync
ubidev="$( nand_find_ubi "$CI_UBIPART" )"
ubidev="$(nand_find_ubi "$CI_UBIPART")"
fi
if [ "$ubidev" ]; then
local squash_ubivol="$( nand_find_volume $ubidev squashfs )"
# kill volume
[ "$squash_ubivol" ] && ubirmvol /dev/$ubidev -N squashfs || true
for vol in $rm_oem_fw_vols; do
ubirmvol "/dev/$ubidev" -N "$vol" 2>/dev/null
done
fi
# complete std upgrade
nand_upgrade_tar "$1"
}
[ "$magic_long" = "27051956" ] && {
# This magic is for a uImage (which is a sysupgrade image)
# check firmwares' rootfs types
local oldroot="$(linksys_get_root_magic $target_mtd)"
local oldroot="$(linksys_get_root_magic "$target_mtd")"
local newroot="$(linksys_get_root_magic "$1")"
if [ "$newroot" = "55424923" -a "$oldroot" = "55424923" ]; then
if [ "$newroot" = "55424923" ] && [ "$oldroot" = "55424923" ]; then
# we're upgrading from a firmware with UBI to one with UBI
# erase everything to be safe
# - Is that really needed? Won't remove (or comment) the if, because it may be needed in a future device.
# - Is that really needed? Won't remove (or comment) the if,
# because it may be needed in a future device.
#mtd erase $part_label
#get_image "$1" | mtd -n write - $part_label
echo "writing \"$1\" UBI image to \"$part_label\" (UBI)..."
get_image "$1" | mtd write - $part_label
get_image "$1" | mtd write - "$part_label"
else
echo "writing \"$1\" image to \"$part_label\""
get_image "$1" | mtd write - $part_label
get_image "$1" | mtd write - "$part_label"
fi
}
}