From 05414dd116c549a0b9dd57ee4e73ddd9a0038e41 Mon Sep 17 00:00:00 2001 From: Ido Schimmel Date: Sun, 21 Apr 2019 07:18:36 +0000 Subject: [PATCH] mlxsw: spectrum_router: Relax FIB rule validation Currently, mlxsw does not support policy-based routing (PBR) and therefore forbids the installation of non-default FIB rules except for the l3mdev rule which is used for VRFs. Relax the check to allow the installation of FIB rules that would never match packets received by the device. Specifically, if the iif is that of the loopback netdev. This is useful for users that need to redirect locally generated packets based on FIB rules. Signed-off-by: Ido Schimmel Acked-by: Jiri Pirko Tested-by: Alexander Petrovskiy Signed-off-by: David S. Miller --- drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c index 6c73400b1508..8f31c2ddc538 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c @@ -6050,6 +6050,10 @@ static int mlxsw_sp_router_fib_rule_event(unsigned long event, fr_info = container_of(info, struct fib_rule_notifier_info, info); rule = fr_info->rule; + /* Rule only affects locally generated traffic */ + if (rule->iifindex == info->net->loopback_dev->ifindex) + return 0; + switch (info->family) { case AF_INET: if (!fib4_rule_default(rule) && !rule->l3mdev)