The preinit network initialisation and failsafe informational message
are inherently racy as the interface takes some time to become
functional after "ip link set $pi_ifname up" command.
Consider this timing:
[ 12.002713] IPv6: ADDRCONF(NETDEV_UP): eth1: link is not ready
[ 12.008819] IPv6: ADDRCONF(NETDEV_UP): eth1.1: link is not ready
[ 12.118877] random: procd: uninitialized urandom read (4 bytes read)
[ 13.068614] eth1: link up (1000Mbps/Full duplex)
[ 13.073309] IPv6: ADDRCONF(NETDEV_CHANGE): eth1: link becomes ready
[ 13.080445] IPv6: ADDRCONF(NETDEV_CHANGE): eth1.1: link becomes ready
Since the UDP message was sent prior to link becoming ready, it was
never seen on the wire.
The default failsafe timeout is set to 2 seconds, so with this patch
there are two attempts to send the message, one spent in vain, and the
other visible in tcpdump on an attached host. Of course, in cases when
the interface is brought up faster it leads to two messages, however it
should be harmless. This patch (almost) doesn't affect normal boot time
while still allowing to enter failsafe reliably with a single button
press, matching the official "generic failsafe" documentation.
Signed-off-by: Paul Fertser <fercerpav@gmail.com>
With failsafe disabled there is no point in early network setup. We
don't send announcement over UDP and there is no way to ssh to the
device.
A side effect of this is avoiding a possibly incorrect network config
(only with failsafe disabled). This problem is related to possible
changes made by user in /etc/config/network.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
For targets using the generic board detection and board specific
settings in diag.sh, the board name is still unset at the time the
set_state() provided by diag.sh is called by 10_indicate_preinit.
Change the execution order to ensure the boardname is populated before
required the first time. Do the target specific board detection as
early as possible, directly followed by the generic one to allow a
seamless switch to the generic function for populating /tmp/sysinfo/.
Signed-off-by: Mathias Kresin <dev@kresin.me>
Don't pass the value unconditionally to swconfig as a parameter but
instead only call reset if it is 1.
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
The condition is always true due to the literal string followed the
-n test parameter. A model name set by target scripts always gets
overwritten this way.
Change the condition to check for an already existing destination file
as it was before 5e85ae9 ("base-files: fix error message during boot").
Signed-off-by: Mathias Kresin <dev@kresin.me>
Due to an empty pi_ifname in the generic failsafe setup, the deconfig
never removed the failsafe networking interface, causing broken
networking later on.
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Also configure the switch based on the failsafe config, and create the
failsafe interface as tagged if necessary.
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
In preparation of properly setting up vlans and switches, add
support for configuring failsafe on a vlan tagged interface.
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Move preinit interface and ip config to its own function to allow
calling it from more than one place.
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
This commit:
1) seed /dev/urandom with the saved seeds as early as possible
(see /lib/preinit/81_urandom_seed)
2) save a seed at /etc/urandom.seed if it doesn't exists
3) save a new seed each boot at "system.@system[0].urandom_seed"
(see /etc/init.d/urandom_seed)
We use getrandom() so we are sure /dev/urandom pool is initialized
Seed size is 512 bytes (ie /proc/sys/kernel/random/poolsize / 8)
it's the same size as in ubuntu 14.04 and all systemd systems
Seeding /dev/urandom doesn't change entropy estimation, so we still have
"random: ubus urandom read with 4 bits of entropy available"
messages in the logs, but we can now ignore them if
after "urandom-seed: Seeding with ..." message
Saving a new seed on each boot is disabled by default to avoid too much
writes without user consent
v2: log preinit messages to /dev/kmsg
v3: use non generic function name for logging, as /lib/preinit/ files
are all sourced together in /etc/preinit
v4: after a lot of discussion on the ML, use a uci config param
v5: config param is now the path of the seed
Signed-off-by: Etienne CHAMPETIER <champetier.etienne@gmail.com>
Acked-by: Jo-Philipp Wich <jo@mein.io>
This enables passworldless login for root via SSH whenever no root
password is set (e.g. after reset, flashing without keeping config
or in failsafe) and removes telnet support alltogether.
Signed-off-by: Steven Barth <steven@midlink.org>
SVN-Revision: 46809
This new argument is used right after starting regular preinit (which
happens if failsafe wasn't triggered). The main purpose of "preinit"
argument is to indicate that failsafe can be triggered, however we were
missing a way to inform user that we don't wait for a trigger anymore.
With this change it's clear when failsafe mode can be triggered.
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
SVN-Revision: 43715
The behaviour of calling 'mount' differed depending on whether it called
the busybox-mount, the mount of util-linux, the mount defined in
/lib/functions.sh and /lib/functions/boot.sh
/etc/preinit even included /lib/functions.sh and /lib/functions/boot.sh,
both re-defining 'mount'.
SVN-Revision: 34792
Busybox built against musl-libc will choke on these otherwise, besides that
it is more natural to use the filesystem type, then options, then name, then
mountpoint.
Signed-off-by: Florian Fainelli <florian@openwrt.org>
SVN-Revision: 34308
