diff options
| author | David Ahern | 2018-10-15 18:56:51 -0700 |
|---|---|---|
| committer | David S. Miller | 2018-10-16 00:14:08 -0700 |
| commit | e4e92fb160d7bef689c6ad00108b4e52599ca05e (patch) | |
| tree | eca4db1ca406c8c5d36daebbd92576ababdc4869 | |
| parent | 08e814c9e8eb5a982cbd1e8f6bd255d97c51026f (diff) | |
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>
| -rw-r--r-- | net/ipv4/fib_frontend.c | 8 |
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) { |