From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Ahern Subject: [PATCH v2 net-next 10/11] net/ipv6: Bail early if user only wants cloned entries Date: Mon, 15 Oct 2018 18:56:50 -0700 Message-ID: <20181016015651.22696-11-dsahern@kernel.org> References: <20181016015651.22696-1-dsahern@kernel.org> Cc: David Ahern To: netdev@vger.kernel.org, davem@davemloft.net Return-path: Received: from mail.kernel.org ([198.145.29.99]:37866 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727074AbeJPJou (ORCPT ); Tue, 16 Oct 2018 05:44:50 -0400 In-Reply-To: <20181016015651.22696-1-dsahern@kernel.org> Sender: netdev-owner@vger.kernel.org List-ID: From: David Ahern Similar to IPv4, IPv6 fib no longer contains cloned routes. If a user requests a route dump for only cloned entries, no sense walking the FIB and returning everything. Signed-off-by: David Ahern --- net/ipv6/ip6_fib.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c index 5562c77022c6..2a058b408a6a 100644 --- a/net/ipv6/ip6_fib.c +++ b/net/ipv6/ip6_fib.c @@ -586,10 +586,13 @@ static int inet6_dump_fib(struct sk_buff *skb, struct netlink_callback *cb) } else if (nlmsg_len(nlh) >= sizeof(struct rtmsg)) { struct rtmsg *rtm = nlmsg_data(nlh); - if (rtm->rtm_flags & RTM_F_PREFIX) - arg.filter.flags = RTM_F_PREFIX; + arg.filter.flags = rtm->rtm_flags & (RTM_F_PREFIX|RTM_F_CLONED); } + /* fib entries are never clones */ + if (arg.filter.flags & RTM_F_CLONED) + return skb->len; + w = (void *)cb->args[2]; if (!w) { /* New dump: -- 2.11.0