* Drop test on 'sk': sock->sk cannot be NULL, or pppox_ioctl() could
not have called us.
* Drop test on 'SOCK_DEAD' state: if this flag was set, the socket
would be in the process of being released and no ioctl could be
running anymore.
* Drop test on 'PPPOX_*' state: we depend on ->sk_user_data to get
the session structure. If it is non-NULL, then the socket is
connected. Testing for PPPOX_* is redundant.
* Retrieve session using ->sk_user_data directly, instead of going
through pppol2tp_sock_to_session(). This avoids grabbing a useless
reference on the socket.
Signed-off-by: Guillaume Nault <g.na...@alphalink.fr>
---
net/l2tp/l2tp_ppp.c | 33 ++++++---------------------------
1 file changed, 6 insertions(+), 27 deletions(-)
diff --git a/net/l2tp/l2tp_ppp.c b/net/l2tp/l2tp_ppp.c
index cd43d02484e4..e3ed8d473d91 100644
--- a/net/l2tp/l2tp_ppp.c
+++ b/net/l2tp/l2tp_ppp.c
@@ -1179,28 +1179,12 @@ static int pppol2tp_tunnel_ioctl(struct l2tp_tunnel
*tunnel,
static int pppol2tp_ioctl(struct socket *sock, unsigned int cmd,
unsigned long arg)
{
- struct sock *sk = sock->sk;
struct l2tp_session *session;
struct l2tp_tunnel *tunnel;
- int err;
-
- if (!sk)
- return 0;
-
- err = -EBADF;
- if (sock_flag(sk, SOCK_DEAD) != 0)
- goto end;
-
- err = -ENOTCONN;
- if ((sk->sk_user_data == NULL) ||
- (!(sk->sk_state & (PPPOX_CONNECTED | PPPOX_BOUND))))
- goto end;
- /* Get session context from the socket */
- err = -EBADF;
- session = pppol2tp_sock_to_session(sk);
- if (session == NULL)
- goto end;
+ session = sock->sk->sk_user_data;
+ if (!session)
+ return -ENOTCONN;
/* Special case: if session's session_id is zero, treat ioctl as a
* tunnel ioctl
@@ -1208,16 +1192,11 @@ static int pppol2tp_ioctl(struct socket *sock, unsigned
int cmd,
if ((session->session_id == 0) &&
(session->peer_session_id == 0)) {
tunnel = session->tunnel;
- err = pppol2tp_tunnel_ioctl(tunnel, cmd, arg);
- goto end_put_sess;
- }
- err = pppol2tp_session_ioctl(session, cmd, arg);
+ return pppol2tp_tunnel_ioctl(tunnel, cmd, arg);
+ }
-end_put_sess:
- sock_put(sk);
-end:
- return err;
+ return pppol2tp_session_ioctl(session, cmd, arg);
}
/*****************************************************************************
--
2.18.0
