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events/10.interfaces: move some parts to helper functions

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metze

(This used to be ctdb commit 24cd42769d8f32b90a8876a6a08a36ab23076cd1)
This commit is contained in:
Stefan Metzmacher 2009-12-18 11:08:22 +01:00
parent d01870f138
commit c251ac20fa
1 changed files with 59 additions and 28 deletions
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87
ctdb/config/events.d/10.interface
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@ -17,6 +17,58 @@ loadconfig
exit 0
}
add_ip_to_iface()
{
local _iface=$1
local _ip=$2
local _maskbits=$3
# we make sure the interface is up first
/sbin/ip link set $_iface up || {
echo "Failed to bringup interface $_iface"
return 1;
}
/sbin/ip addr add $_ip/$_maskbits brd + dev $_iface || {
echo "Failed to add $_ip/$_maskbits on dev $_iface"
return 1;
}
return 0;
}
delete_ip_from_iface()
{
local _iface=$1
local _ip=$2
local _maskbits=$3
# the ip tool will delete all secondary IPs if this is the primary. To work around
# this _very_ annoying behaviour we have to keep a record of the secondaries and re-add
# them afterwards. yuck
local _secondaries=""
if /sbin/ip addr list dev $_iface primary | grep -q "inet $_ip/$_maskbits " ; then
_secondaries=`/sbin/ip addr list dev $_iface secondary | grep " inet " | awk '{print $2}'`
fi
local _failed=0
/sbin/ip addr del $_ip/$_maskbits dev $_iface || _failed=1
[ -z "$_secondaries" ] || {
local _i=""
for _i in $_secondaries; do
if /sbin/ip addr list dev $_iface | grep -q "inet $_i" ; then
echo "kept secondary $_i on dev $_iface"
else
echo "re-adding secondary address $_i to dev $_iface"
/sbin/ip addr add $_i dev $_iface || _failed=1
fi
done
}
[ $_failed = 0 ] || {
echo "Failed to del $_ip on dev $_iface"
return 1;
}
return 0;
}
case "$1" in
#############################
# called when ctdbd starts up
@ -49,14 +101,10 @@ case "$1" in
ip=$3
maskbits=$4
# we make sure the interface is up first
/sbin/ip link set $iface up || {
echo "Failed to bringup interface $iface"
exit 1
}
/sbin/ip addr add $ip/$maskbits brd + dev $iface || {
echo "Failed to add $ip/$maskbits on dev $iface"
add_ip_to_iface $iface $ip $maskbits || {
exit 1;
}
# cope with the script being killed while we have the interface blocked
iptables -D INPUT -i $iface -d $ip -j DROP 2> /dev/null
@ -93,29 +141,12 @@ case "$1" in
iptables -I INPUT -i $iface -d $ip -j DROP
kill_tcp_connections $ip
# the ip tool will delete all secondary IPs if this is the primary. To work around
# this _very_ annoying behaviour we have to keep a record of the secondaries and re-add
# them afterwards. yuck
secondaries=""
if /sbin/ip addr list dev $iface primary | grep -q "inet $ip/$maskbits " ; then
secondaries=`/sbin/ip addr list dev $iface secondary | grep " inet " | awk '{print $2}'`
fi
/sbin/ip addr del $ip/$maskbits dev $iface || failed=1
[ -z "$secondaries" ] || {
for i in $secondaries; do
if /sbin/ip addr list dev $iface | grep -q "inet $i" ; then
echo "kept secondary $i on dev $iface"
else
echo "re-adding secondary address $i to dev $iface"
/sbin/ip addr add $i dev $iface || failed=1
fi
done
delete_ip_from_iface $iface $ip $maskbits || {
iptables -D INPUT -i $iface -d $ip -j DROP 2> /dev/null
exit 1;
}
iptables -D INPUT -i $iface -d $ip -j DROP 2> /dev/null
[ $failed = 0 ] || {
echo "Failed to del $ip on dev $iface"
exit 1
}
# flush our route cache
echo 1 > /proc/sys/net/ipv4/route/flush