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net/ipv6: Bail early if user only wants cloned entries 

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 <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Ahern 2018-10-15 18:56:50 -07:00 committed by David S. Miller
parent 196cfebf89
commit 08e814c9e8
1 changed files with 5 additions and 2 deletions
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7
net/ipv6/ip6_fib.c
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@ -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)) { } else if (nlmsg_len(nlh) >= sizeof(struct rtmsg)) {
struct rtmsg *rtm = nlmsg_data(nlh); struct rtmsg *rtm = nlmsg_data(nlh);
if (rtm->rtm_flags & RTM_F_PREFIX) arg.filter.flags = rtm->rtm_flags & (RTM_F_PREFIX|RTM_F_CLONED);
arg.filter.flags = RTM_F_PREFIX;
} }
/* fib entries are never clones */
if (arg.filter.flags & RTM_F_CLONED)
return skb->len;
w = (void *)cb->args[2]; w = (void *)cb->args[2];
if (!w) { if (!w) {
/* New dump: /* New dump: