[Cerowrt-devel] sysupgrade failure solved

[Sebastian Moeller]

Dear list,

for some time now we had the issue that the sysupgrade command did not work. 

So here is the output of my first attempt to sysupgrade 3.10.18-1 to 3.10.21-1:

root at nacktmulle:~# sysupgrade -d 60 -n -v /home/persistent/cerowrts/3.10.21-1/3.10.21-1-sysupgrade.bin 
killall: watchdog: no process killed
Sending TERM to remaining processes ... udhcpc lighttpd crond lighttpd snmpd xinetd dbus-daemon odhcp6c zebra babeld watchquagga avahi-daemon rngd ntpd pimd minissdpd dnsmasq sh ubusd askfirst netifd 
Sending KILL to remaining processes ... ubusd askfirst 
Switching to ramdisk...
mount:  /proc is not a block device
umount: /tmp/root: not mounted
Failed to switch over to ramfs. Please reboot.
root at nacktmulle:~# 

As you can see this did not work. After a reboot I removed the mount-utils packet:
root at nacktmulle:~# sysupgrade -d 60 -n -v /home/persistent/cerowrts/3.10.21-1/3.10.21-1-sysupgrade.bin 
killall: watchdog: no process killed
Sending TERM to remaining processes ... udhcpc lighttpd crond lighttpd snmpd xinetd dbus-daemon odhcp6c zebra babeld watchquagga avahi-daemon rngd ntpd pimd minissdpd dnsmasq ubusd askfirst netifd 
Sending KILL to remaining processes ... ubusd askfirst 
Switching to ramdisk...
Performing system upgrade...
Unlocking firmware ...

Writing from <stdin> to firmware ...     
Upgrade completed

The root cause for the sysupgrade filure with installed mount-utils is the fact that mount-utils' /usr/bin/mount has different calling conventions than busy box's /bin/mount which in result make sysupgrade fail. So the easiest solution for sysupgrade is to remove mount-utils before running sysupgrade. (An alternative proposed earlier would be to edit the sysupgrade script to always call /bin/mount and /bin/umount)

Bonus, on my router I mount a swp partition and a home partition (ext4)  from an usb stick, both mount fine without mount-utils installed. So maybe we can move mount-utils out of the default installs?


Best Regards
	Sebastian