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selftests: forwarding: lib: Add sysctl_set(), sysctl_restore()

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Add two helper functions: sysctl_set() to change the value of a given
sysctl setting, and sysctl_restore() to change it back to what it was.

Signed-off-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Petr Machata 2018-05-03 12:36:59 +02:00 committed by David S. Miller
parent 41f405460a
commit f5ae57784b
1 changed files with 17 additions and 0 deletions
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17
tools/testing/selftests/net/forwarding/lib.sh
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@ -381,6 +381,23 @@ bridge_ageing_time_get()
echo $((ageing_time / 100))
}
declare -A SYSCTL_ORIG
sysctl_set()
{
local key=$1; shift
local value=$1; shift
SYSCTL_ORIG[$key]=$(sysctl -n $key)
sysctl -qw $key=$value
}
sysctl_restore()
{
local key=$1; shift
sysctl -qw $key=${SYSCTL_ORIG["$key"]}
}
forwarding_enable()
{
ipv4_fwd=$(sysctl -n net.ipv4.conf.all.forwarding)