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Commit e4e92fb1 authored by David Ahern's avatar David Ahern Committed by David S. Miller
Browse files

net/ipv4: Bail early if user only wants prefix entries 



Unlike IPv6, IPv4 does not have routes marked with RTF_PREFIX_RT. If the
flag is set in the dump request, just return.

In the process of this change, move the CLONE check to use the new
filter flags.

Signed-off-by: default avatarDavid Ahern <dsahern@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 08e814c9

net/ipv4/fib_frontend.c

+6 −2
Original line number Diff line number Diff line
@@ -886,10 +886,14 @@ static int inet_dump_fib(struct sk_buff *skb, struct netlink_callback *cb) 
		err = ip_valid_fib_dump_req(net, nlh, &filter, cb);

		if (err < 0)

			return err;

	} else if (nlmsg_len(nlh) >= sizeof(struct rtmsg)) {

		struct rtmsg *rtm = nlmsg_data(nlh);



		filter.flags = rtm->rtm_flags & (RTM_F_PREFIX | RTM_F_CLONED);

	}



	if (nlmsg_len(nlh) >= sizeof(struct rtmsg) &&

	    ((struct rtmsg *)nlmsg_data(nlh))->rtm_flags & RTM_F_CLONED)

	/* fib entries are never clones and ipv4 does not use prefix flag */

	if (filter.flags & (RTM_F_PREFIX | RTM_F_CLONED))

		return skb->len;



	if (filter.table_id) {