^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /* Multipath TCP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (c) 2019, Tessares SA.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/sysctl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <net/net_namespace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <net/netns/generic.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include "protocol.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #define MPTCP_SYSCTL_PATH "net/mptcp"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) static int mptcp_pernet_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) struct mptcp_pernet {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) struct ctl_table_header *ctl_table_hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) int mptcp_enabled;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) static struct mptcp_pernet *mptcp_get_pernet(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) return net_generic(net, mptcp_pernet_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) int mptcp_is_enabled(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) return mptcp_get_pernet(net)->mptcp_enabled;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) static struct ctl_table mptcp_sysctl_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) .procname = "enabled",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) .maxlen = sizeof(int),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) .mode = 0644,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) /* users with CAP_NET_ADMIN or root (not and) can change this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * value, same as other sysctl or the 'net' tree.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) .proc_handler = proc_dointvec,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) static void mptcp_pernet_set_defaults(struct mptcp_pernet *pernet)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) pernet->mptcp_enabled = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) static int mptcp_pernet_new_table(struct net *net, struct mptcp_pernet *pernet)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) struct ctl_table_header *hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) struct ctl_table *table;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) table = mptcp_sysctl_table;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) if (!net_eq(net, &init_net)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) table = kmemdup(table, sizeof(mptcp_sysctl_table), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) if (!table)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) goto err_alloc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) table[0].data = &pernet->mptcp_enabled;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) hdr = register_net_sysctl(net, MPTCP_SYSCTL_PATH, table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) if (!hdr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) goto err_reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) pernet->ctl_table_hdr = hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) err_reg:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) if (!net_eq(net, &init_net))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) kfree(table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) err_alloc:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) static void mptcp_pernet_del_table(struct mptcp_pernet *pernet)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) struct ctl_table *table = pernet->ctl_table_hdr->ctl_table_arg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) unregister_net_sysctl_table(pernet->ctl_table_hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) kfree(table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) static int __net_init mptcp_net_init(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) struct mptcp_pernet *pernet = mptcp_get_pernet(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) mptcp_pernet_set_defaults(pernet);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) return mptcp_pernet_new_table(net, pernet);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) /* Note: the callback will only be called per extra netns */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) static void __net_exit mptcp_net_exit(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) struct mptcp_pernet *pernet = mptcp_get_pernet(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) mptcp_pernet_del_table(pernet);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) static struct pernet_operations mptcp_pernet_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) .init = mptcp_net_init,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) .exit = mptcp_net_exit,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) .id = &mptcp_pernet_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) .size = sizeof(struct mptcp_pernet),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) void __init mptcp_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) mptcp_join_cookie_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) mptcp_proto_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) if (register_pernet_subsys(&mptcp_pernet_ops) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) panic("Failed to register MPTCP pernet subsystem.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) #if IS_ENABLED(CONFIG_MPTCP_IPV6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) int __init mptcpv6_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) err = mptcp_proto_v6_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) #endif
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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