Release 4.11 net/l2tp/l2tp_netlink.c
/*
* L2TP netlink layer, for management
*
* Copyright (c) 2008,2009,2010 Katalix Systems Ltd
*
* Partly based on the IrDA nelink implementation
* (see net/irda/irnetlink.c) which is:
* Copyright (c) 2007 Samuel Ortiz <samuel@sortiz.org>
* which is in turn partly based on the wireless netlink code:
* Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <net/sock.h>
#include <net/genetlink.h>
#include <net/udp.h>
#include <linux/in.h>
#include <linux/udp.h>
#include <linux/socket.h>
#include <linux/module.h>
#include <linux/list.h>
#include <net/net_namespace.h>
#include <linux/l2tp.h>
#include "l2tp_core.h"
static struct genl_family l2tp_nl_family;
static const struct genl_multicast_group l2tp_multicast_group[] = {
{
.name = L2TP_GENL_MCGROUP,
},
};
static int l2tp_nl_tunnel_send(struct sk_buff *skb, u32 portid, u32 seq,
int flags, struct l2tp_tunnel *tunnel, u8 cmd);
static int l2tp_nl_session_send(struct sk_buff *skb, u32 portid, u32 seq,
int flags, struct l2tp_session *session,
u8 cmd);
/* Accessed under genl lock */
static const struct l2tp_nl_cmd_ops *l2tp_nl_cmd_ops[__L2TP_PWTYPE_MAX];
static struct l2tp_session *l2tp_nl_session_get(struct genl_info *info,
bool do_ref)
{
u32 tunnel_id;
u32 session_id;
char *ifname;
struct l2tp_tunnel *tunnel;
struct l2tp_session *session = NULL;
struct net *net = genl_info_net(info);
if (info->attrs[L2TP_ATTR_IFNAME]) {
ifname = nla_data(info->attrs[L2TP_ATTR_IFNAME]);
session = l2tp_session_get_by_ifname(net, ifname, do_ref);
} else if ((info->attrs[L2TP_ATTR_SESSION_ID]) &&
(info->attrs[L2TP_ATTR_CONN_ID])) {
tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]);
session_id = nla_get_u32(info->attrs[L2TP_ATTR_SESSION_ID]);
tunnel = l2tp_tunnel_find(net, tunnel_id);
if (tunnel)
session = l2tp_session_get(net, tunnel, session_id,
do_ref);
}
return session;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
James Chapman | 148 | 93.67% | 1 | 50.00% |
Guillaume Nault | 10 | 6.33% | 1 | 50.00% |
Total | 158 | 100.00% | 2 | 100.00% |
static int l2tp_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
{
struct sk_buff *msg;
void *hdr;
int ret = -ENOBUFS;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg) {
ret = -ENOMEM;
goto out;
}
hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
&l2tp_nl_family, 0, L2TP_CMD_NOOP);
if (!hdr) {
ret = -EMSGSIZE;
goto err_out;
}
genlmsg_end(msg, hdr);
return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
err_out:
nlmsg_free(msg);
out:
return ret;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
James Chapman | 120 | 95.24% | 1 | 25.00% |
Wei Yongjun | 3 | 2.38% | 1 | 25.00% |
Eric W. Biedermann | 2 | 1.59% | 1 | 25.00% |
Thomas Graf | 1 | 0.79% | 1 | 25.00% |
Total | 126 | 100.00% | 4 | 100.00% |
static int l2tp_tunnel_notify(struct genl_family *family,
struct genl_info *info,
struct l2tp_tunnel *tunnel,
u8 cmd)
{
struct sk_buff *msg;
int ret;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
ret = l2tp_nl_tunnel_send(msg, info->snd_portid, info->snd_seq,
NLM_F_ACK, tunnel, cmd);
if (ret >= 0) {
ret = genlmsg_multicast_allns(family, msg, 0, 0, GFP_ATOMIC);
/* We don't care if no one is listening */
if (ret == -ESRCH)
ret = 0;
return ret;
}
nlmsg_free(msg);
return ret;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Bill Hong | 98 | 83.76% | 1 | 50.00% |
Mark Tomlinson | 19 | 16.24% | 1 | 50.00% |
Total | 117 | 100.00% | 2 | 100.00% |
static int l2tp_session_notify(struct genl_family *family,
struct genl_info *info,
struct l2tp_session *session,
u8 cmd)
{
struct sk_buff *msg;
int ret;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
ret = l2tp_nl_session_send(msg, info->snd_portid, info->snd_seq,
NLM_F_ACK, session, cmd);
if (ret >= 0) {
ret = genlmsg_multicast_allns(family, msg, 0, 0, GFP_ATOMIC);
/* We don't care if no one is listening */
if (ret == -ESRCH)
ret = 0;
return ret;
}
nlmsg_free(msg);
return ret;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Bill Hong | 98 | 83.76% | 1 | 50.00% |
Mark Tomlinson | 19 | 16.24% | 1 | 50.00% |
Total | 117 | 100.00% | 2 | 100.00% |
static int l2tp_nl_cmd_tunnel_create(struct sk_buff *skb, struct genl_info *info)
{
u32 tunnel_id;
u32 peer_tunnel_id;
int proto_version;
int fd;
int ret = 0;
struct l2tp_tunnel_cfg cfg = { 0, };
struct l2tp_tunnel *tunnel;
struct net *net = genl_info_net(info);
if (!info->attrs[L2TP_ATTR_CONN_ID]) {
ret = -EINVAL;
goto out;
}
tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]);
if (!info->attrs[L2TP_ATTR_PEER_CONN_ID]) {
ret = -EINVAL;
goto out;
}
peer_tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_PEER_CONN_ID]);
if (!info->attrs[L2TP_ATTR_PROTO_VERSION]) {
ret = -EINVAL;
goto out;
}
proto_version = nla_get_u8(info->attrs[L2TP_ATTR_PROTO_VERSION]);
if (!info->attrs[L2TP_ATTR_ENCAP_TYPE]) {
ret = -EINVAL;
goto out;
}
cfg.encap = nla_get_u16(info->attrs[L2TP_ATTR_ENCAP_TYPE]);
fd = -1;
if (info->attrs[L2TP_ATTR_FD]) {
fd = nla_get_u32(info->attrs[L2TP_ATTR_FD]);
} else {
#if IS_ENABLED(CONFIG_IPV6)
if (info->attrs[L2TP_ATTR_IP6_SADDR] &&
info->attrs[L2TP_ATTR_IP6_DADDR]) {
cfg.local_ip6 = nla_data(
info->attrs[L2TP_ATTR_IP6_SADDR]);
cfg.peer_ip6 = nla_data(
info->attrs[L2TP_ATTR_IP6_DADDR]);
} else
#endif
if (info->attrs[L2TP_ATTR_IP_SADDR] &&
info->attrs[L2TP_ATTR_IP_DADDR]) {
cfg.local_ip.s_addr = nla_get_in_addr(
info->attrs[L2TP_ATTR_IP_SADDR]);
cfg.peer_ip.s_addr = nla_get_in_addr(
info->attrs[L2TP_ATTR_IP_DADDR]);
} else {
ret = -EINVAL;
goto out;
}
if (info->attrs[L2TP_ATTR_UDP_SPORT])
cfg.local_udp_port = nla_get_u16(info->attrs[L2TP_ATTR_UDP_SPORT]);
if (info->attrs[L2TP_ATTR_UDP_DPORT])
cfg.peer_udp_port = nla_get_u16(info->attrs[L2TP_ATTR_UDP_DPORT]);
cfg.use_udp_checksums = nla_get_flag(
info->attrs[L2TP_ATTR_UDP_CSUM]);
#if IS_ENABLED(CONFIG_IPV6)
cfg.udp6_zero_tx_checksums = nla_get_flag(
info->attrs[L2TP_ATTR_UDP_ZERO_CSUM6_TX]);
cfg.udp6_zero_rx_checksums = nla_get_flag(
info->attrs[L2TP_ATTR_UDP_ZERO_CSUM6_RX]);
#endif
}
if (info->attrs[L2TP_ATTR_DEBUG])
cfg.debug = nla_get_u32(info->attrs[L2TP_ATTR_DEBUG]);
tunnel = l2tp_tunnel_find(net, tunnel_id);
if (tunnel != NULL) {
ret = -EEXIST;
goto out;
}
ret = -EINVAL;
switch (cfg.encap) {
case L2TP_ENCAPTYPE_UDP:
case L2TP_ENCAPTYPE_IP:
ret = l2tp_tunnel_create(net, fd, proto_version, tunnel_id,
peer_tunnel_id, &cfg, &tunnel);
break;
}
if (ret >= 0)
ret = l2tp_tunnel_notify(&l2tp_nl_family, info,
tunnel, L2TP_CMD_TUNNEL_CREATE);
out:
return ret;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
James Chapman | 415 | 76.43% | 2 | 33.33% |
Chris Elston | 70 | 12.89% | 1 | 16.67% |
Tom Herbert | 36 | 6.63% | 1 | 16.67% |
Bill Hong | 20 | 3.68% | 1 | 16.67% |
Jiri Benc | 2 | 0.37% | 1 | 16.67% |
Total | 543 | 100.00% | 6 | 100.00% |
static int l2tp_nl_cmd_tunnel_delete(struct sk_buff *skb, struct genl_info *info)
{
struct l2tp_tunnel *tunnel;
u32 tunnel_id;
int ret = 0;
struct net *net = genl_info_net(info);
if (!info->attrs[L2TP_ATTR_CONN_ID]) {
ret = -EINVAL;
goto out;
}
tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]);
tunnel = l2tp_tunnel_find(net, tunnel_id);
if (tunnel == NULL) {
ret = -ENODEV;
goto out;
}
l2tp_tunnel_notify(&l2tp_nl_family, info,
tunnel, L2TP_CMD_TUNNEL_DELETE);
(void) l2tp_tunnel_delete(tunnel);
out:
return ret;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
James Chapman | 109 | 90.08% | 1 | 50.00% |
Bill Hong | 12 | 9.92% | 1 | 50.00% |
Total | 121 | 100.00% | 2 | 100.00% |
static int l2tp_nl_cmd_tunnel_modify(struct sk_buff *skb, struct genl_info *info)
{
struct l2tp_tunnel *tunnel;
u32 tunnel_id;
int ret = 0;
struct net *net = genl_info_net(info);
if (!info->attrs[L2TP_ATTR_CONN_ID]) {
ret = -EINVAL;
goto out;
}
tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]);
tunnel = l2tp_tunnel_find(net, tunnel_id);
if (tunnel == NULL) {
ret = -ENODEV;
goto out;
}
if (info->attrs[L2TP_ATTR_DEBUG])
tunnel->debug = nla_get_u32(info->attrs[L2TP_ATTR_DEBUG]);
ret = l2tp_tunnel_notify(&l2tp_nl_family, info,
tunnel, L2TP_CMD_TUNNEL_MODIFY);
out:
return ret;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
James Chapman | 124 | 89.86% | 1 | 50.00% |
Bill Hong | 14 | 10.14% | 1 | 50.00% |
Total | 138 | 100.00% | 2 | 100.00% |
static int l2tp_nl_tunnel_send(struct sk_buff *skb, u32 portid, u32 seq, int flags,
struct l2tp_tunnel *tunnel, u8 cmd)
{
void *hdr;
struct nlattr *nest;
struct sock *sk = NULL;
struct inet_sock *inet;
#if IS_ENABLED(CONFIG_IPV6)
struct ipv6_pinfo *np = NULL;
#endif
hdr = genlmsg_put(skb, portid, seq, &l2tp_nl_family, flags, cmd);
if (!hdr)
return -EMSGSIZE;
if (nla_put_u8(skb, L2TP_ATTR_PROTO_VERSION, tunnel->version) ||
nla_put_u32(skb, L2TP_ATTR_CONN_ID, tunnel->tunnel_id) ||
nla_put_u32(skb, L2TP_ATTR_PEER_CONN_ID, tunnel->peer_tunnel_id) ||
nla_put_u32(skb, L2TP_ATTR_DEBUG, tunnel->debug) ||
nla_put_u16(skb, L2TP_ATTR_ENCAP_TYPE, tunnel->encap))
goto nla_put_failure;
nest = nla_nest_start(skb, L2TP_ATTR_STATS);
if (nest == NULL)
goto nla_put_failure;
if (nla_put_u64_64bit(skb, L2TP_ATTR_TX_PACKETS,
atomic_long_read(&tunnel->stats.tx_packets),
L2TP_ATTR_STATS_PAD) ||
nla_put_u64_64bit(skb, L2TP_ATTR_TX_BYTES,
atomic_long_read(&tunnel->stats.tx_bytes),
L2TP_ATTR_STATS_PAD) ||
nla_put_u64_64bit(skb, L2TP_ATTR_TX_ERRORS,
atomic_long_read(&tunnel->stats.tx_errors),
L2TP_ATTR_STATS_PAD) ||
nla_put_u64_64bit(skb, L2TP_ATTR_RX_PACKETS,
atomic_long_read(&tunnel->stats.rx_packets),
L2TP_ATTR_STATS_PAD) ||
nla_put_u64_64bit(skb, L2TP_ATTR_RX_BYTES,
atomic_long_read(&tunnel->stats.rx_bytes),
L2TP_ATTR_STATS_PAD) ||
nla_put_u64_64bit(skb, L2TP_ATTR_RX_SEQ_DISCARDS,
atomic_long_read(&tunnel->stats.rx_seq_discards),
L2TP_ATTR_STATS_PAD) ||
nla_put_u64_64bit(skb, L2TP_ATTR_RX_OOS_PACKETS,
atomic_long_read(&tunnel->stats.rx_oos_packets),
L2TP_ATTR_STATS_PAD) ||
nla_put_u64_64bit(skb, L2TP_ATTR_RX_ERRORS,
atomic_long_read(&tunnel->stats.rx_errors),
L2TP_ATTR_STATS_PAD))
goto nla_put_failure;
nla_nest_end(skb, nest);
sk = tunnel->sock;
if (!sk)
goto out;
#if IS_ENABLED(CONFIG_IPV6)
if (sk->sk_family == AF_INET6)
np = inet6_sk(sk);
#endif
inet = inet_sk(sk);
switch (tunnel->encap) {
case L2TP_ENCAPTYPE_UDP:
switch (sk->sk_family) {
case AF_INET:
if (nla_put_u8(skb, L2TP_ATTR_UDP_CSUM, !sk->sk_no_check_tx))
goto nla_put_failure;
break;
#if IS_ENABLED(CONFIG_IPV6)
case AF_INET6:
if (udp_get_no_check6_tx(sk) &&
nla_put_flag(skb, L2TP_ATTR_UDP_ZERO_CSUM6_TX))
goto nla_put_failure;
if (udp_get_no_check6_rx(sk) &&
nla_put_flag(skb, L2TP_ATTR_UDP_ZERO_CSUM6_RX))
goto nla_put_failure;
break;
#endif
}
if (nla_put_u16(skb, L2TP_ATTR_UDP_SPORT, ntohs(inet->inet_sport)) ||
nla_put_u16(skb, L2TP_ATTR_UDP_DPORT, ntohs(inet->inet_dport)))
goto nla_put_failure;
/* NOBREAK */
case L2TP_ENCAPTYPE_IP:
#if IS_ENABLED(CONFIG_IPV6)
if (np) {
if (nla_put_in6_addr(skb, L2TP_ATTR_IP6_SADDR,
&np->saddr) ||
nla_put_in6_addr(skb, L2TP_ATTR_IP6_DADDR,
&sk->sk_v6_daddr))
goto nla_put_failure;
} else
#endif
if (nla_put_in_addr(skb, L2TP_ATTR_IP_SADDR,
inet->inet_saddr) ||
nla_put_in_addr(skb, L2TP_ATTR_IP_DADDR,
inet->inet_daddr))
goto nla_put_failure;
break;
}
out:
genlmsg_end(skb, hdr);
return 0;
nla_put_failure:
genlmsg_cancel(skb, hdr);
return -1;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
James Chapman | 310 | 51.93% | 1 | 7.69% |
Chris Elston | 78 | 13.07% | 1 | 7.69% |
Asbjörn Sloth Tönnesen | 75 | 12.56% | 2 | 15.38% |
Tom Parkin | 48 | 8.04% | 1 | 7.69% |
David S. Miller | 44 | 7.37% | 1 | 7.69% |
Nicolas Dichtel | 24 | 4.02% | 1 | 7.69% |
Jiri Benc | 4 | 0.67% | 1 | 7.69% |
Bill Hong | 4 | 0.67% | 1 | 7.69% |
Johannes Berg | 3 | 0.50% | 1 | 7.69% |
Wei Yongjun | 3 | 0.50% | 1 | 7.69% |
Eric W. Biedermann | 2 | 0.34% | 1 | 7.69% |
Eric Dumazet | 2 | 0.34% | 1 | 7.69% |
Total | 597 | 100.00% | 13 | 100.00% |
static int l2tp_nl_cmd_tunnel_get(struct sk_buff *skb, struct genl_info *info)
{
struct l2tp_tunnel *tunnel;
struct sk_buff *msg;
u32 tunnel_id;
int ret = -ENOBUFS;
struct net *net = genl_info_net(info);
if (!info->attrs[L2TP_ATTR_CONN_ID]) {
ret = -EINVAL;
goto out;
}
tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]);
tunnel = l2tp_tunnel_find(net, tunnel_id);
if (tunnel == NULL) {
ret = -ENODEV;
goto out;
}
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg) {
ret = -ENOMEM;
goto out;
}
ret = l2tp_nl_tunnel_send(msg, info->snd_portid, info->snd_seq,
NLM_F_ACK, tunnel, L2TP_CMD_TUNNEL_GET);
if (ret < 0)
goto err_out;
return genlmsg_unicast(net, msg, info->snd_portid);
err_out:
nlmsg_free(msg);
out:
return ret;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
James Chapman | 175 | 97.22% | 1 | 25.00% |
Bill Hong | 2 | 1.11% | 1 | 25.00% |
Eric W. Biedermann | 2 | 1.11% | 1 | 25.00% |
Thomas Graf | 1 | 0.56% | 1 | 25.00% |
Total | 180 | 100.00% | 4 | 100.00% |
static int l2tp_nl_cmd_tunnel_dump(struct sk_buff *skb, struct netlink_callback *cb)
{
int ti = cb->args[0];
struct l2tp_tunnel *tunnel;
struct net *net = sock_net(skb->sk);
for (;;) {
tunnel = l2tp_tunnel_find_nth(net, ti);
if (tunnel == NULL)
goto out;
if (l2tp_nl_tunnel_send(skb, NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq, NLM_F_MULTI,
tunnel, L2TP_CMD_TUNNEL_GET) < 0)
goto out;
ti++;
}
out:
cb->args[0] = ti;
return skb->len;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
James Chapman | 116 | 96.67% | 1 | 25.00% |
Bill Hong | 2 | 1.67% | 1 | 25.00% |
Johannes Berg | 1 | 0.83% | 1 | 25.00% |
Eric W. Biedermann | 1 | 0.83% | 1 | 25.00% |
Total | 120 | 100.00% | 4 | 100.00% |
static int l2tp_nl_cmd_session_create(struct sk_buff *skb, struct genl_info *info)
{
u32 tunnel_id = 0;
u32 session_id;
u32 peer_session_id;
int ret = 0;
struct l2tp_tunnel *tunnel;
struct l2tp_session *session;
struct l2tp_session_cfg cfg = { 0, };
struct net *net = genl_info_net(info);
if (!info->attrs[L2TP_ATTR_CONN_ID]) {
ret = -EINVAL;
goto out;
}
tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]);
tunnel = l2tp_tunnel_find(net, tunnel_id);
if (!tunnel) {
ret = -ENODEV;
goto out;
}
if (!info->attrs[L2TP_ATTR_SESSION_ID]) {
ret = -EINVAL;
goto out;
}
session_id = nla_get_u32(info->attrs[L2TP_ATTR_SESSION_ID]);
session = l2tp_session_find(net, tunnel, session_id);
if (session) {
ret = -EEXIST;
goto out;
}
if (!info->attrs[L2TP_ATTR_PEER_SESSION_ID]) {
ret = -EINVAL;
goto out;
}
peer_session_id = nla_get_u32(info->attrs[L2TP_ATTR_PEER_SESSION_ID]);
if (!info->attrs[L2TP_ATTR_PW_TYPE]) {
ret = -EINVAL;
goto out;
}
cfg.pw_type = nla_get_u16(info->attrs[L2TP_ATTR_PW_TYPE]);
if (cfg.pw_type >= __L2TP_PWTYPE_MAX) {
ret = -EINVAL;
goto out;
}
if (tunnel->version > 2) {
if (info->attrs[L2TP_ATTR_OFFSET])
cfg.offset = nla_get_u16(info->attrs[L2TP_ATTR_OFFSET]);
if (info->attrs[L2TP_ATTR_DATA_SEQ])
cfg.data_seq = nla_get_u8(info->attrs[L2TP_ATTR_DATA_SEQ]);
cfg.l2specific_type = L2TP_L2SPECTYPE_DEFAULT;
if (info->attrs[L2TP_ATTR_L2SPEC_TYPE])
cfg.l2specific_type = nla_get_u8(info->attrs[L2TP_ATTR_L2SPEC_TYPE]);
cfg.l2specific_len = 4;
if (info->attrs[L2TP_ATTR_L2SPEC_LEN])
cfg.l2specific_len = nla_get_u8(info->attrs[L2TP_ATTR_L2SPEC_LEN]);
if (info->attrs[L2TP_ATTR_COOKIE]) {
u16 len = nla_len(info->attrs[L2TP_ATTR_COOKIE]);
if (len > 8) {
ret = -EINVAL;
goto out;
}
cfg.cookie_len = len;
memcpy(&cfg.cookie[0], nla_data(info->attrs[L2TP_ATTR_COOKIE]), len);
}
if (info->attrs[L2TP_ATTR_PEER_COOKIE]) {
u16 len = nla_len(info->attrs[L2TP_ATTR_PEER_COOKIE]);
if (len > 8) {
ret = -EINVAL;
goto out;
}
cfg.peer_cookie_len = len;
memcpy(&cfg.peer_cookie[0], nla_data(info->attrs[L2TP_ATTR_PEER_COOKIE]), len);
}
if (info->attrs[L2TP_ATTR_IFNAME])
cfg.ifname = nla_data(info->attrs[L2TP_ATTR_IFNAME]);
if (info->attrs[L2TP_ATTR_VLAN_ID])
cfg.vlan_id = nla_get_u16(info->attrs[L2TP_ATTR_VLAN_ID]);
}
if (info->attrs[L2TP_ATTR_DEBUG])
cfg.debug = nla_get_u32(info->attrs[L2TP_ATTR_DEBUG]);
if (info->attrs[L2TP_ATTR_RECV_SEQ])
cfg.recv_seq = nla_get_u8(info->attrs[L2TP_ATTR_RECV_SEQ]);
if (info->attrs[L2TP_ATTR_SEND_SEQ])
cfg.send_seq = nla_get_u8(info->attrs[L2TP_ATTR_SEND_SEQ]);
if (info->attrs[L2TP_ATTR_LNS_MODE])
cfg.lns_mode = nla_get_u8(info->attrs[L2TP_ATTR_LNS_MODE]);
if (info->attrs[L2TP_ATTR_RECV_TIMEOUT])
cfg.reorder_timeout = nla_get_msecs(info->attrs[L2TP_ATTR_RECV_TIMEOUT]);
if (info->attrs[L2TP_ATTR_MTU])
cfg.mtu = nla_get_u16(info->attrs[L2TP_ATTR_MTU]);
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