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gluon-ebtables: Enable concurrent ebtables updates

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This enables the ebtables internal locking mechanism which
will avoid race conditions between multiple, concurrent
ebtables calls.

This is a preparation for the upcoming gluon-arp-limiter
daemon, to avoid issues if upon restarting gluon-ebtables
the gluon-arp-limiter daemon tries to modify the tables.

Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
This commit is contained in:
Linus Lüssing 2017-11-26 22:40:02 +01:00 committed by Sven Eckelmann
parent f4dd913031
commit 1fc17fd634
1 changed files with 8 additions and 4 deletions
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12
package/gluon-ebtables/files/etc/init.d/gluon-ebtables
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@ -51,8 +51,12 @@ exec_all() {
start() { start() {
( (
export EBTABLES_RULE='"ebtables -t " .. table .. " -A " .. command' export EBTABLES_RULE='"ebtables --concurrent -t " .. table .. " -A " .. command'
export EBTABLES_CHAIN='"ebtables -t " .. table .. " -N " .. name .. " -P " .. policy' export EBTABLES_CHAIN='"ebtables --concurrent -t " .. table .. " -N " .. name .. " -P " .. policy'
# Contains /var/lib/ebtables/lock for '--concurrent'
[ ! -d "/var/lib/ebtables" ] && \
mkdir -p /var/lib/ebtables
if [ -z "$1" ]; then if [ -z "$1" ]; then
exec_all '' exec_all ''
@ -64,8 +68,8 @@ start() {
stop() { stop() {
( (
export EBTABLES_RULE='"ebtables -t " .. table .. " -D " .. command' export EBTABLES_RULE='"ebtables --concurrent -t " .. table .. " -D " .. command'
export EBTABLES_CHAIN='"ebtables -t " .. table .. " -X " .. name' export EBTABLES_CHAIN='"ebtables --concurrent -t " .. table .. " -X " .. name'
if [ -z "$1" ]; then if [ -z "$1" ]; then
exec_all '-r' exec_all '-r'