From f1f39f91102733bcde2462c6a138f636ee541ea8 Mon Sep 17 00:00:00 2001 From: stephen hemminger Date: Wed, 23 Sep 2015 21:33:34 -0700 Subject: [PATCH 1/3] l2tp: auto load type modules It should not be necessary to do explicit module loading when configuring L2TP. Modules should be loaded as needed instead (as is done already with netlink and other tunnel types). This patch adds a new module alias type and code to load the sub module on demand. Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller --- net/l2tp/l2tp_core.h | 3 +++ net/l2tp/l2tp_eth.c | 1 + net/l2tp/l2tp_netlink.c | 7 +++++++ net/l2tp/l2tp_ppp.c | 1 + 4 files changed, 12 insertions(+) diff --git a/net/l2tp/l2tp_core.h b/net/l2tp/l2tp_core.h index 68aa9ffd4ae4..5871537af387 100644 --- a/net/l2tp/l2tp_core.h +++ b/net/l2tp/l2tp_core.h @@ -321,4 +321,7 @@ do { \ #define l2tp_dbg(ptr, type, fmt, ...) \ l2tp_printk(ptr, type, pr_debug, fmt, ##__VA_ARGS__) +#define MODULE_ALIAS_L2TP_PWTYPE(type) \ + MODULE_ALIAS("net-l2tp-type-" __stringify(type)) + #endif /* _L2TP_CORE_H_ */ diff --git a/net/l2tp/l2tp_eth.c b/net/l2tp/l2tp_eth.c index 4b552873b556..e253c26f31ac 100644 --- a/net/l2tp/l2tp_eth.c +++ b/net/l2tp/l2tp_eth.c @@ -358,3 +358,4 @@ MODULE_LICENSE("GPL"); MODULE_AUTHOR("James Chapman "); MODULE_DESCRIPTION("L2TP ethernet pseudowire driver"); MODULE_VERSION("1.0"); +MODULE_ALIAS_L2TP_PWTYPE(5); diff --git a/net/l2tp/l2tp_netlink.c b/net/l2tp/l2tp_netlink.c index 9e13c2ff8789..f93c5be612a7 100644 --- a/net/l2tp/l2tp_netlink.c +++ b/net/l2tp/l2tp_netlink.c @@ -576,6 +576,13 @@ static int l2tp_nl_cmd_session_create(struct sk_buff *skb, struct genl_info *inf if (info->attrs[L2TP_ATTR_MRU]) cfg.mru = nla_get_u16(info->attrs[L2TP_ATTR_MRU]); +#ifdef CONFIG_MODULES + if (l2tp_nl_cmd_ops[cfg.pw_type] == NULL) { + genl_unlock(); + request_module("net-l2tp-type-%u", cfg.pw_type); + genl_lock(); + } +#endif if ((l2tp_nl_cmd_ops[cfg.pw_type] == NULL) || (l2tp_nl_cmd_ops[cfg.pw_type]->session_create == NULL)) { ret = -EPROTONOSUPPORT; diff --git a/net/l2tp/l2tp_ppp.c b/net/l2tp/l2tp_ppp.c index f56c9f69e9f2..1ad18c55064c 100644 --- a/net/l2tp/l2tp_ppp.c +++ b/net/l2tp/l2tp_ppp.c @@ -1863,3 +1863,4 @@ MODULE_DESCRIPTION("PPP over L2TP over UDP"); MODULE_LICENSE("GPL"); MODULE_VERSION(PPPOL2TP_DRV_VERSION); MODULE_ALIAS("pppox-proto-" __stringify(PX_PROTO_OL2TP)); +MODULE_ALIAS_L2TP_PWTYPE(11); From 163c2e252fa658ac26edda78d2a9e3939f7d10e5 Mon Sep 17 00:00:00 2001 From: stephen hemminger Date: Wed, 23 Sep 2015 21:33:35 -0700 Subject: [PATCH 2/3] l2tp: auto load IP modules When creating a IP encapsulated tunnel the necessary l2tp module should be loaded. It already works for UDP encapsulation, it just doesn't work for direct IP encap. Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller --- net/l2tp/l2tp_ip.c | 1 + net/l2tp/l2tp_ip6.c | 1 + 2 files changed, 2 insertions(+) diff --git a/net/l2tp/l2tp_ip.c b/net/l2tp/l2tp_ip.c index 79649937ec71..ec22078b0914 100644 --- a/net/l2tp/l2tp_ip.c +++ b/net/l2tp/l2tp_ip.c @@ -655,3 +655,4 @@ MODULE_VERSION("1.0"); * enums */ MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_INET, 2, IPPROTO_L2TP); +MODULE_ALIAS_NET_PF_PROTO(PF_INET, IPPROTO_L2TP); diff --git a/net/l2tp/l2tp_ip6.c b/net/l2tp/l2tp_ip6.c index d1ded3777815..aca38d8aed8e 100644 --- a/net/l2tp/l2tp_ip6.c +++ b/net/l2tp/l2tp_ip6.c @@ -801,3 +801,4 @@ MODULE_VERSION("1.0"); * enums */ MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_INET6, 2, IPPROTO_L2TP); +MODULE_ALIAS_NET_PF_PROTO(PF_INET6, IPPROTO_L2TP); From 008aa6a4faac36fe623ff5a1ba753dc9b0d8102e Mon Sep 17 00:00:00 2001 From: stephen hemminger Date: Wed, 23 Sep 2015 21:33:36 -0700 Subject: [PATCH 3/3] l2tp: remove references to modprobe in documentation No longer need explicit modprobe's and update to use ip instead of deprecated ifconfig command. Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller --- Documentation/networking/l2tp.txt | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/Documentation/networking/l2tp.txt b/Documentation/networking/l2tp.txt index c74434de2fa5..4650a00ed012 100644 --- a/Documentation/networking/l2tp.txt +++ b/Documentation/networking/l2tp.txt @@ -213,15 +213,12 @@ To create an L2TPv3 ethernet pseudowire between local host 192.168.1.1 and peer 192.168.1.2, using IP addresses 10.5.1.1 and 10.5.1.2 for the tunnel endpoints:- -# modprobe l2tp_eth -# modprobe l2tp_netlink - # ip l2tp add tunnel tunnel_id 1 peer_tunnel_id 1 udp_sport 5000 \ udp_dport 5000 encap udp local 192.168.1.1 remote 192.168.1.2 # ip l2tp add session tunnel_id 1 session_id 1 peer_session_id 1 -# ifconfig -a +# ip -s -d show dev l2tpeth0 # ip addr add 10.5.1.2/32 peer 10.5.1.1/32 dev l2tpeth0 -# ifconfig l2tpeth0 up +# ip li set dev l2tpeth0 up Choose IP addresses to be the address of a local IP interface and that of the remote system. The IP addresses of the l2tpeth0 interface can be