l2tp: remove unused stats from l2tp_ip socket

The l2tp_ip socket currently maintains packet/byte stats in its
private socket structure. But these counters aren't exposed to
userspace and so serve no purpose. The counters were also
smp-unsafe. So this patch just gets rid of the stats.

While here, change a couple of internal __u32 variables to u32.

Signed-off-by: James Chapman <jchapman@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 28 deletions

diff --git a/net/l2tp/l2tp_ip.c b/net/l2tp/l2tp_ip.c
index 516259284846..adefe5225dca 100644
--- a/net/l2tp/l2tp_ip.c
+++ b/net/l2tp/l2tp_ip.c
@@ -32,15 +32,8 @@ struct l2tp_ip_sock {
         /* inet_sock has to be the first member of l2tp_ip_sock */
         struct inet_sock        inet;
 
-        __u32                   conn_id;
-        __u32                   peer_conn_id;
-
-        __u64                   tx_packets;
-        __u64                   tx_bytes;
-        __u64                   tx_errors;
-        __u64                   rx_packets;
-        __u64                   rx_bytes;
-        __u64                   rx_errors;
+        u32                     conn_id;
+        u32                     peer_conn_id;
 };
 
 static DEFINE_RWLOCK(l2tp_ip_lock);
@@ -298,7 +291,6 @@ out_in_use:
 static int l2tp_ip_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 {
         struct sockaddr_l2tpip *lsa = (struct sockaddr_l2tpip *) uaddr;
-        struct inet_sock *inet = inet_sk(sk);
         int rc;
 
         if (addr_len < sizeof(*lsa))
@@ -374,7 +366,6 @@ static int l2tp_ip_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *m
 {
         struct sk_buff *skb;
         int rc;
-        struct l2tp_ip_sock *lsa = l2tp_ip_sk(sk);
         struct inet_sock *inet = inet_sk(sk);
         struct rtable *rt = NULL;
         struct flowi4 *fl4;
@@ -473,14 +464,8 @@ static int l2tp_ip_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *m
         rcu_read_unlock();
 
 error:
-        /* Update stats */
-        if (rc >= 0) {
-                lsa->tx_packets++;
-                lsa->tx_bytes += len;
+        if (rc >= 0)
                 rc = len;
-        } else {
-                lsa->tx_errors++;
-        }
 
 out:
         release_sock(sk);
@@ -498,7 +483,6 @@ static int l2tp_ip_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *m
                            size_t len, int noblock, int flags, int *addr_len)
 {
         struct inet_sock *inet = inet_sk(sk);
-        struct l2tp_ip_sock *lsk = l2tp_ip_sk(sk);
         size_t copied = 0;
         int err = -EOPNOTSUPP;
         struct sockaddr_in *sin = (struct sockaddr_in *)msg->msg_name;
@@ -540,15 +524,7 @@ static int l2tp_ip_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *m
 done:
         skb_free_datagram(sk, skb);
 out:
-        if (err) {
-                lsk->rx_errors++;
-                return err;
-        }
-
-        lsk->rx_packets++;
-        lsk->rx_bytes += copied;
-
-        return copied;
+        return err ? err : copied;
 }
 
 static struct proto l2tp_ip_prot = {