1 // SPDX-License-Identifier: GPL-2.0
4 * Copyright (c) 2019, Tessares SA.
8 #include <linux/sysctl.h>
11 #include <net/net_namespace.h>
12 #include <net/netns/generic.h>
16 #define MPTCP_SYSCTL_PATH "net/mptcp"
18 static int mptcp_pernet_id;
21 struct ctl_table_header *ctl_table_hdr;
25 unsigned int add_addr_timeout;
28 static struct mptcp_pernet *mptcp_get_pernet(struct net *net)
30 return net_generic(net, mptcp_pernet_id);
33 int mptcp_is_enabled(struct net *net)
35 return mptcp_get_pernet(net)->mptcp_enabled;
38 unsigned int mptcp_get_add_addr_timeout(struct net *net)
40 return mptcp_get_pernet(net)->add_addr_timeout;
43 static void mptcp_pernet_set_defaults(struct mptcp_pernet *pernet)
45 pernet->mptcp_enabled = 1;
46 pernet->add_addr_timeout = TCP_RTO_MAX;
50 static struct ctl_table mptcp_sysctl_table[] = {
52 .procname = "enabled",
55 /* users with CAP_NET_ADMIN or root (not and) can change this
56 * value, same as other sysctl or the 'net' tree.
58 .proc_handler = proc_dou8vec_minmax,
59 .extra1 = SYSCTL_ZERO,
63 .procname = "add_addr_timeout",
64 .maxlen = sizeof(unsigned int),
66 .proc_handler = proc_dointvec_jiffies,
71 static int mptcp_pernet_new_table(struct net *net, struct mptcp_pernet *pernet)
73 struct ctl_table_header *hdr;
74 struct ctl_table *table;
76 table = mptcp_sysctl_table;
77 if (!net_eq(net, &init_net)) {
78 table = kmemdup(table, sizeof(mptcp_sysctl_table), GFP_KERNEL);
83 table[0].data = &pernet->mptcp_enabled;
84 table[1].data = &pernet->add_addr_timeout;
86 hdr = register_net_sysctl(net, MPTCP_SYSCTL_PATH, table);
90 pernet->ctl_table_hdr = hdr;
95 if (!net_eq(net, &init_net))
101 static void mptcp_pernet_del_table(struct mptcp_pernet *pernet)
103 struct ctl_table *table = pernet->ctl_table_hdr->ctl_table_arg;
105 unregister_net_sysctl_table(pernet->ctl_table_hdr);
112 static int mptcp_pernet_new_table(struct net *net, struct mptcp_pernet *pernet)
117 static void mptcp_pernet_del_table(struct mptcp_pernet *pernet) {}
119 #endif /* CONFIG_SYSCTL */
121 static int __net_init mptcp_net_init(struct net *net)
123 struct mptcp_pernet *pernet = mptcp_get_pernet(net);
125 mptcp_pernet_set_defaults(pernet);
127 return mptcp_pernet_new_table(net, pernet);
130 /* Note: the callback will only be called per extra netns */
131 static void __net_exit mptcp_net_exit(struct net *net)
133 struct mptcp_pernet *pernet = mptcp_get_pernet(net);
135 mptcp_pernet_del_table(pernet);
138 static struct pernet_operations mptcp_pernet_ops = {
139 .init = mptcp_net_init,
140 .exit = mptcp_net_exit,
141 .id = &mptcp_pernet_id,
142 .size = sizeof(struct mptcp_pernet),
145 void __init mptcp_init(void)
147 mptcp_join_cookie_init();
150 if (register_pernet_subsys(&mptcp_pernet_ops) < 0)
151 panic("Failed to register MPTCP pernet subsystem.\n");
154 #if IS_ENABLED(CONFIG_MPTCP_IPV6)
155 int __init mptcpv6_init(void)
159 err = mptcp_proto_v6_init();