ipv4: Notify route if replacing currently offloaded one
When replacing a route, its replacement should only be notified in case the replaced route is of any interest to listeners. In other words, if the replaced route is currently used in the data path, which means it is the first route in the FIB alias list with the given {prefix, prefix length, table ID}. v2: * Convert to use fib_find_alias() instead of fib_find_first_alias() Signed-off-by: Ido Schimmel <idosch@mellanox.com> Reviewed-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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