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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>
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@ -6050,6 +6050,10 @@ static int mlxsw_sp_router_fib_rule_event(unsigned long event,
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fr_info = container_of(info, struct fib_rule_notifier_info, info);
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rule = fr_info->rule;
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/* Rule only affects locally generated traffic */
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if (rule->iifindex == info->net->loopback_dev->ifindex)
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return 0;
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switch (info->family) {
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case AF_INET:
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if (!fib4_rule_default(rule) && !rule->l3mdev)
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