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l2tp: remove header length param from l2tp_xmit_skb

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All callers pass the session structure's hdr_len field as the header
length parameter to l2tp_xmit_skb.

Since we're passing a pointer to the session structure to l2tp_xmit_skb
anyway, there's not much point breaking the header length out as a
separate argument.

Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tom Parkin 2020-09-03 09:54:47 +01:00 committed by David S. Miller
parent ffd923f5f8
commit efe0527882
4 changed files with 9 additions and 10 deletions
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10
net/l2tp/l2tp_core.c
View file

@ -1017,7 +1017,7 @@ static void l2tp_xmit_core(struct l2tp_session *session, struct sk_buff *skb,
/* If caller requires the skb to have a ppp header, the header must be
* inserted in the skb data before calling this function.
*/
int l2tp_xmit_skb(struct l2tp_session *session, struct sk_buff *skb, int hdr_len)
int l2tp_xmit_skb(struct l2tp_session *session, struct sk_buff *skb)
{
int data_len = skb->len;
struct l2tp_tunnel *tunnel = session->tunnel;
@ -1035,7 +1035,7 @@ int l2tp_xmit_skb(struct l2tp_session *session, struct sk_buff *skb, int hdr_len
* make room. Adjust truesize.
*/
headroom = NET_SKB_PAD + sizeof(struct iphdr) +
uhlen + hdr_len;
uhlen + session->hdr_len;
if (skb_cow_head(skb, headroom)) {
kfree_skb(skb);
return NET_XMIT_DROP;
@ -1043,9 +1043,9 @@ int l2tp_xmit_skb(struct l2tp_session *session, struct sk_buff *skb, int hdr_len
/* Setup L2TP header */
if (tunnel->version == L2TP_HDR_VER_2)
l2tp_build_l2tpv2_header(session, __skb_push(skb, hdr_len));
l2tp_build_l2tpv2_header(session, __skb_push(skb, session->hdr_len));
else
l2tp_build_l2tpv3_header(session, __skb_push(skb, hdr_len));
l2tp_build_l2tpv3_header(session, __skb_push(skb, session->hdr_len));
/* Reset skb netfilter state */
memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
@ -1079,7 +1079,7 @@ int l2tp_xmit_skb(struct l2tp_session *session, struct sk_buff *skb, int hdr_len
uh = udp_hdr(skb);
uh->source = inet->inet_sport;
uh->dest = inet->inet_dport;
udp_len = uhlen + hdr_len + data_len;
udp_len = uhlen + session->hdr_len + data_len;
uh->len = htons(udp_len);
/* Calculate UDP checksum if configured to do so */

3
net/l2tp/l2tp_core.h
View file

@ -261,8 +261,7 @@ int l2tp_udp_encap_recv(struct sock *sk, struct sk_buff *skb);
/* Transmit path helpers for sending packets over the tunnel socket. */
void l2tp_session_set_header_len(struct l2tp_session *session, int version);
int l2tp_xmit_skb(struct l2tp_session *session, struct sk_buff *skb,
int hdr_len);
int l2tp_xmit_skb(struct l2tp_session *session, struct sk_buff *skb);
/* Pseudowire management.
* Pseudowires should register with l2tp core on module init, and unregister

2
net/l2tp/l2tp_eth.c
View file

@ -76,7 +76,7 @@ static netdev_tx_t l2tp_eth_dev_xmit(struct sk_buff *skb, struct net_device *dev
struct l2tp_eth *priv = netdev_priv(dev);
struct l2tp_session *session = priv->session;
unsigned int len = skb->len;
int ret = l2tp_xmit_skb(session, skb, session->hdr_len);
int ret = l2tp_xmit_skb(session, skb);
if (likely(ret == NET_XMIT_SUCCESS)) {
atomic_long_add(len, &priv->tx_bytes);

4
net/l2tp/l2tp_ppp.c
View file

@ -316,7 +316,7 @@ static int pppol2tp_sendmsg(struct socket *sock, struct msghdr *m,
}
local_bh_disable();
l2tp_xmit_skb(session, skb, session->hdr_len);
l2tp_xmit_skb(session, skb);
local_bh_enable();
sock_put(sk);
@ -375,7 +375,7 @@ static int pppol2tp_xmit(struct ppp_channel *chan, struct sk_buff *skb)
skb->data[1] = PPP_UI;
local_bh_disable();
l2tp_xmit_skb(session, skb, session->hdr_len);
l2tp_xmit_skb(session, skb);
local_bh_enable();
sock_put(sk);