From f1f39f91102733bcde2462c6a138f636ee541ea8 Mon Sep 17 00:00:00 2001 From: stephen hemminger Date: Wed, 23 Sep 2015 21:33:34 -0700 Subject: [PATCH] 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); -- 2.20.1