blob: 0afa7a265b9438b535210127afe2deda4d8d1303 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
|
#!/bin/ash
# Force immediate switch to localhost for stage4 if applicable
if [ -d "/mnt/dnbd3" ] && [ -b /dev/dnbd0 ] \
&& [ "$( cat /sys/block/dnbd0/net/rid )" -gt 0 ]; then
DNBD3_PORT=5003
# give it some time to start
usleep 250000
if ! grep -q -F 127.0.0.1 /sys/block/dnbd0/net/alt_servers; then
# add the server
if ! dnbd3-client -A "127.0.0.1:$DNBD3_PORT" -d /dev/dnbd0; then
echo "WARN: Cannot add localhost to dnbd0" >&2
fi
fi
# Call this repeatedly - this will keep resetting the RTT values to
# prevent switching away from localhost for some time, which can
# sometimes happen during bootup, if the system is so busy that the
# local dnbd3 proxy replies slower than some upstream server on the
# network, which is not that unlikely if the data is not cached
# locally yet.
for i in 1 2 4 8 16 32 64 128; do
dnbd3-client -s "127.0.0.1:$DNBD3_PORT" -d /dev/dnbd0 &> /dev/null
usleep ${i}00000 # tenths of a second
done
# One last time without swallowing any errors
dnbd3-client -s "127.0.0.1:$DNBD3_PORT" -d /dev/dnbd0
fi
exit 0
|
