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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 <idosch@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Tested-by: Alexander Petrovskiy <alexpe@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ido Schimmel 2019-04-21 07:18:36 +00:00 committed by David S. Miller
parent fa73989f26
commit 05414dd116
1 changed files with 4 additions and 0 deletions
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4
drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
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@ -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)