diff options
| author | Tom Parkin <tparkin@katalix.com> | 2020-09-18 11:23:21 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-09-18 14:36:54 -0700 |
| commit | f52e4b27d1ac837caa84973262f7057578f6e316 (patch) | |
| tree | eac7bc551ee75716488daad6203af8e0cbe276df | |
| parent | a9fd686a71e97f7be3e3e640957a3228cb1fd1d7 (diff) | |
l2tp: fix up inconsistent rx/tx statistics
Historically L2TP core statistics count the L2TP header in the
per-session and per-tunnel byte counts tracked for transmission and
receipt.
Now that l2tp_xmit_skb updates tx stats, it is necessary for
l2tp_xmit_core to pass out the length of the transmitted packet so that
the statistics can be updated correctly.
Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/l2tp/l2tp_core.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/net/l2tp/l2tp_core.c b/net/l2tp/l2tp_core.c index 7de05be4fc33..7be5103ff2a8 100644 --- a/net/l2tp/l2tp_core.c +++ b/net/l2tp/l2tp_core.c @@ -1006,7 +1006,7 @@ static int l2tp_xmit_queue(struct l2tp_tunnel *tunnel, struct sk_buff *skb, stru return err >= 0 ? NET_XMIT_SUCCESS : NET_XMIT_DROP; } -static int l2tp_xmit_core(struct l2tp_session *session, struct sk_buff *skb) +static int l2tp_xmit_core(struct l2tp_session *session, struct sk_buff *skb, unsigned int *len) { struct l2tp_tunnel *tunnel = session->tunnel; unsigned int data_len = skb->len; @@ -1054,6 +1054,11 @@ static int l2tp_xmit_core(struct l2tp_session *session, struct sk_buff *skb) goto out_unlock; } + /* Report transmitted length before we add encap header, which keeps + * statistics consistent for both UDP and IP encap tx/rx paths. + */ + *len = skb->len; + inet = inet_sk(sk); switch (tunnel->encap) { case L2TP_ENCAPTYPE_UDP: @@ -1095,10 +1100,10 @@ out_unlock: */ int l2tp_xmit_skb(struct l2tp_session *session, struct sk_buff *skb) { - unsigned int len = skb->len; + unsigned int len = 0; int ret; - ret = l2tp_xmit_core(session, skb); + ret = l2tp_xmit_core(session, skb, &len); if (ret == NET_XMIT_SUCCESS) { atomic_long_inc(&session->tunnel->stats.tx_packets); atomic_long_add(len, &session->tunnel->stats.tx_bytes); |