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authorDavid Ahern <dsahern@gmail.com>2018-10-16 04:56:51 +0300
committerDavid S. Miller <davem@davemloft.net>2018-10-16 10:14:08 +0300
commite4e92fb160d7bef689c6ad00108b4e52599ca05e (patch)
treeeca4db1ca406c8c5d36daebbd92576ababdc4869 /net/ipv4/fib_frontend.c
parent08e814c9e8eb5a982cbd1e8f6bd255d97c51026f (diff)
downloadlinux-e4e92fb160d7bef689c6ad00108b4e52599ca05e.tar.xz
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: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/fib_frontend.c')
-rw-r--r--net/ipv4/fib_frontend.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index e86ca2255181..5bf653f36911 100644
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -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) {