ipv4/fib_frontend: Allow RTM_F_CLONED flag to be used for filtering

This functionally reverts the check introduced by commit
e8ba330ac0c5 ("rtnetlink: Update fib dumps for strict data checking")
as modified by commit e4e92fb160d7 ("net/ipv4: Bail early if user only
wants prefix entries").

As we are preparing to fix listing of IPv4 cached routes, we need to
give userspace a way to request them.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index ed7fb5f..317339c 100644 (file)
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -987,8 +987,8 @@ static int inet_dump_fib(struct sk_buff *skb, struct netlink_callback *cb)
                filter.flags = rtm->rtm_flags & (RTM_F_PREFIX | RTM_F_CLONED);
        }
 
-       /* fib entries are never clones and ipv4 does not use prefix flag */
-       if (filter.flags & (RTM_F_PREFIX | RTM_F_CLONED))
+       /* ipv4 does not use prefix flag */
+       if (filter.flags & RTM_F_PREFIX)
                return skb->len;
 
        if (filter.table_id) {