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authorJames Chapman <jchapman@katalix.com>2010-04-02 06:19:33 +0000
committerDavid S. Miller <davem@davemloft.net>2010-04-03 14:56:07 -0700
commit0ad6614048cf722e4d27909665b4846805357f1b (patch)
tree182349ddf6e2b8e8478a5451cd0ed9684c14f0e8 /net/l2tp/l2tp_eth.c
parentd9e31d17ceba5f0736f5a34bbc236239cd42b420 (diff)
downloadlinux-0ad6614048cf722e4d27909665b4846805357f1b.tar.bz2
l2tp: Add debugfs files for dumping l2tp debug info
The existing pppol2tp driver exports debug info to /proc/net/pppol2tp. Rather than adding info to that file for the new functionality added in this patch series, we add new files in debugfs, leaving the old /proc file for backwards compatibility (L2TPv2 only). Currently only one file is provided: l2tp/tunnels, which lists internal debug info for all l2tp tunnels and sessions. More files may be added later. The info is for debug and problem analysis only - userspace apps should use netlink to obtain status about l2tp tunnels and sessions. Although debugfs does not support net namespaces, the tunnels and sessions dumped in l2tp/tunnels are only those in the net namespace of the process reading the file. Signed-off-by: James Chapman <jchapman@katalix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/l2tp/l2tp_eth.c')
-rw-r--r--net/l2tp/l2tp_eth.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/net/l2tp/l2tp_eth.c b/net/l2tp/l2tp_eth.c
index 755c29729b6f..9848faa3d163 100644
--- a/net/l2tp/l2tp_eth.c
+++ b/net/l2tp/l2tp_eth.c
@@ -172,6 +172,17 @@ static void l2tp_eth_delete(struct l2tp_session *session)
}
}
+#ifdef CONFIG_L2TP_DEBUGFS
+static void l2tp_eth_show(struct seq_file *m, void *arg)
+{
+ struct l2tp_session *session = arg;
+ struct l2tp_eth_sess *spriv = l2tp_session_priv(session);
+ struct net_device *dev = spriv->dev;
+
+ seq_printf(m, " interface %s\n", dev->name);
+}
+#endif
+
static int l2tp_eth_create(struct net *net, u32 tunnel_id, u32 session_id, u32 peer_session_id, struct l2tp_session_cfg *cfg)
{
struct net_device *dev;
@@ -233,6 +244,9 @@ static int l2tp_eth_create(struct net *net, u32 tunnel_id, u32 session_id, u32 p
priv->tunnel_sock = tunnel->sock;
session->recv_skb = l2tp_eth_dev_recv;
session->session_close = l2tp_eth_delete;
+#ifdef CONFIG_L2TP_DEBUGFS
+ session->show = l2tp_eth_show;
+#endif
spriv = l2tp_session_priv(session);
spriv->dev = dev;