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authorEric Dumazet <edumazet@google.com>2015-04-28 16:23:48 -0700
committerDavid S. Miller <davem@davemloft.net>2015-04-29 17:10:38 -0400
commit64f40ff5bbdb1b679fb3c4dbc8230d6517d2b8dc (patch)
tree4767b2030e5099a7a63c05c42a7d30c309d62474 /net/ipv4/inet_diag.c
parentbdd1f9edacb5f5835d1e6276571bbbe5b88ded48 (diff)
downloadop-kernel-dev-64f40ff5bbdb1b679fb3c4dbc8230d6517d2b8dc.zip
op-kernel-dev-64f40ff5bbdb1b679fb3c4dbc8230d6517d2b8dc.tar.gz
tcp: prepare CC get_info() access from getsockopt()
We would like that optional info provided by Congestion Control modules using netlink can also be read using getsockopt() This patch changes get_info() to put this information in a buffer, instead of skb, like tcp_get_info(), so that following patch can reuse this common infrastructure. Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Yuchung Cheng <ycheng@google.com> Cc: Neal Cardwell <ncardwell@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Yuchung Cheng <ycheng@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/inet_diag.c')
-rw-r--r--net/ipv4/inet_diag.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/net/ipv4/inet_diag.c b/net/ipv4/inet_diag.c
index bb77ebd..4d32262 100644
--- a/net/ipv4/inet_diag.c
+++ b/net/ipv4/inet_diag.c
@@ -224,14 +224,16 @@ int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk,
handler->idiag_get_info(sk, r, info);
if (sk->sk_state < TCP_TIME_WAIT) {
- int err = 0;
+ union tcp_cc_info info;
+ size_t sz = 0;
+ int attr;
rcu_read_lock();
ca_ops = READ_ONCE(icsk->icsk_ca_ops);
if (ca_ops && ca_ops->get_info)
- err = ca_ops->get_info(sk, ext, skb);
+ sz = ca_ops->get_info(sk, ext, &attr, &info);
rcu_read_unlock();
- if (err < 0)
+ if (sz && nla_put(skb, attr, sz, &info) < 0)
goto errout;
}
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