10abdde82SPaolo Abeni // SPDX-License-Identifier: GPL-2.0 20abdde82SPaolo Abeni /* Multipath TCP 30abdde82SPaolo Abeni * 40abdde82SPaolo Abeni * Copyright (c) 2021, Red Hat. 50abdde82SPaolo Abeni */ 60abdde82SPaolo Abeni 70abdde82SPaolo Abeni #define pr_fmt(fmt) "MPTCP: " fmt 80abdde82SPaolo Abeni 90abdde82SPaolo Abeni #include <linux/kernel.h> 100abdde82SPaolo Abeni #include <linux/module.h> 110abdde82SPaolo Abeni #include <net/sock.h> 120abdde82SPaolo Abeni #include <net/protocol.h> 130abdde82SPaolo Abeni #include <net/tcp.h> 140abdde82SPaolo Abeni #include <net/mptcp.h> 150abdde82SPaolo Abeni #include "protocol.h" 160abdde82SPaolo Abeni 1706f15ceeSFlorian Westphal #define MIN_INFO_OPTLEN_SIZE 16 1806f15ceeSFlorian Westphal 190abdde82SPaolo Abeni static struct sock *__mptcp_tcp_fallback(struct mptcp_sock *msk) 200abdde82SPaolo Abeni { 210abdde82SPaolo Abeni sock_owned_by_me((const struct sock *)msk); 220abdde82SPaolo Abeni 230abdde82SPaolo Abeni if (likely(!__mptcp_check_fallback(msk))) 240abdde82SPaolo Abeni return NULL; 250abdde82SPaolo Abeni 260abdde82SPaolo Abeni return msk->first; 270abdde82SPaolo Abeni } 280abdde82SPaolo Abeni 29df00b087SFlorian Westphal static u32 sockopt_seq_reset(const struct sock *sk) 30df00b087SFlorian Westphal { 31df00b087SFlorian Westphal sock_owned_by_me(sk); 32df00b087SFlorian Westphal 33df00b087SFlorian Westphal /* Highbits contain state. Allows to distinguish sockopt_seq 34df00b087SFlorian Westphal * of listener and established: 35df00b087SFlorian Westphal * s0 = new_listener() 36df00b087SFlorian Westphal * sockopt(s0) - seq is 1 37df00b087SFlorian Westphal * s1 = accept(s0) - s1 inherits seq 1 if listener sk (s0) 38df00b087SFlorian Westphal * sockopt(s0) - seq increments to 2 on s0 39df00b087SFlorian Westphal * sockopt(s1) // seq increments to 2 on s1 (different option) 40df00b087SFlorian Westphal * new ssk completes join, inherits options from s0 // seq 2 41df00b087SFlorian Westphal * Needs sync from mptcp join logic, but ssk->seq == msk->seq 42df00b087SFlorian Westphal * 43df00b087SFlorian Westphal * Set High order bits to sk_state so ssk->seq == msk->seq test 44df00b087SFlorian Westphal * will fail. 45df00b087SFlorian Westphal */ 46df00b087SFlorian Westphal 47df00b087SFlorian Westphal return (u32)sk->sk_state << 24u; 48df00b087SFlorian Westphal } 49df00b087SFlorian Westphal 501b3e7edeSFlorian Westphal static void sockopt_seq_inc(struct mptcp_sock *msk) 511b3e7edeSFlorian Westphal { 521b3e7edeSFlorian Westphal u32 seq = (msk->setsockopt_seq + 1) & 0x00ffffff; 531b3e7edeSFlorian Westphal 541b3e7edeSFlorian Westphal msk->setsockopt_seq = sockopt_seq_reset((struct sock *)msk) + seq; 551b3e7edeSFlorian Westphal } 561b3e7edeSFlorian Westphal 571b3e7edeSFlorian Westphal static int mptcp_get_int_option(struct mptcp_sock *msk, sockptr_t optval, 581b3e7edeSFlorian Westphal unsigned int optlen, int *val) 591b3e7edeSFlorian Westphal { 601b3e7edeSFlorian Westphal if (optlen < sizeof(int)) 611b3e7edeSFlorian Westphal return -EINVAL; 621b3e7edeSFlorian Westphal 631b3e7edeSFlorian Westphal if (copy_from_sockptr(val, optval, sizeof(*val))) 641b3e7edeSFlorian Westphal return -EFAULT; 651b3e7edeSFlorian Westphal 661b3e7edeSFlorian Westphal return 0; 671b3e7edeSFlorian Westphal } 681b3e7edeSFlorian Westphal 691b3e7edeSFlorian Westphal static void mptcp_sol_socket_sync_intval(struct mptcp_sock *msk, int optname, int val) 701b3e7edeSFlorian Westphal { 711b3e7edeSFlorian Westphal struct mptcp_subflow_context *subflow; 721b3e7edeSFlorian Westphal struct sock *sk = (struct sock *)msk; 731b3e7edeSFlorian Westphal 741b3e7edeSFlorian Westphal lock_sock(sk); 751b3e7edeSFlorian Westphal sockopt_seq_inc(msk); 761b3e7edeSFlorian Westphal 771b3e7edeSFlorian Westphal mptcp_for_each_subflow(msk, subflow) { 781b3e7edeSFlorian Westphal struct sock *ssk = mptcp_subflow_tcp_sock(subflow); 791b3e7edeSFlorian Westphal bool slow = lock_sock_fast(ssk); 801b3e7edeSFlorian Westphal 811b3e7edeSFlorian Westphal switch (optname) { 82a03c99b2SFlorian Westphal case SO_DEBUG: 83a03c99b2SFlorian Westphal sock_valbool_flag(ssk, SOCK_DBG, !!val); 84a03c99b2SFlorian Westphal break; 851b3e7edeSFlorian Westphal case SO_KEEPALIVE: 861b3e7edeSFlorian Westphal if (ssk->sk_prot->keepalive) 871b3e7edeSFlorian Westphal ssk->sk_prot->keepalive(ssk, !!val); 881b3e7edeSFlorian Westphal sock_valbool_flag(ssk, SOCK_KEEPOPEN, !!val); 891b3e7edeSFlorian Westphal break; 901b3e7edeSFlorian Westphal case SO_PRIORITY: 911b3e7edeSFlorian Westphal ssk->sk_priority = val; 921b3e7edeSFlorian Westphal break; 935d0a6bc8SFlorian Westphal case SO_SNDBUF: 945d0a6bc8SFlorian Westphal case SO_SNDBUFFORCE: 955d0a6bc8SFlorian Westphal ssk->sk_userlocks |= SOCK_SNDBUF_LOCK; 965d0a6bc8SFlorian Westphal WRITE_ONCE(ssk->sk_sndbuf, sk->sk_sndbuf); 975d0a6bc8SFlorian Westphal break; 985d0a6bc8SFlorian Westphal case SO_RCVBUF: 995d0a6bc8SFlorian Westphal case SO_RCVBUFFORCE: 1005d0a6bc8SFlorian Westphal ssk->sk_userlocks |= SOCK_RCVBUF_LOCK; 1015d0a6bc8SFlorian Westphal WRITE_ONCE(ssk->sk_rcvbuf, sk->sk_rcvbuf); 1025d0a6bc8SFlorian Westphal break; 10336704413SFlorian Westphal case SO_MARK: 10436704413SFlorian Westphal if (READ_ONCE(ssk->sk_mark) != sk->sk_mark) { 10536704413SFlorian Westphal ssk->sk_mark = sk->sk_mark; 10636704413SFlorian Westphal sk_dst_reset(ssk); 10736704413SFlorian Westphal } 10836704413SFlorian Westphal break; 1096f0d7198SFlorian Westphal case SO_INCOMING_CPU: 1106f0d7198SFlorian Westphal WRITE_ONCE(ssk->sk_incoming_cpu, val); 1116f0d7198SFlorian Westphal break; 1121b3e7edeSFlorian Westphal } 1131b3e7edeSFlorian Westphal 1141b3e7edeSFlorian Westphal subflow->setsockopt_seq = msk->setsockopt_seq; 1151b3e7edeSFlorian Westphal unlock_sock_fast(ssk, slow); 1161b3e7edeSFlorian Westphal } 1171b3e7edeSFlorian Westphal 1181b3e7edeSFlorian Westphal release_sock(sk); 1191b3e7edeSFlorian Westphal } 1201b3e7edeSFlorian Westphal 1211b3e7edeSFlorian Westphal static int mptcp_sol_socket_intval(struct mptcp_sock *msk, int optname, int val) 1221b3e7edeSFlorian Westphal { 1231b3e7edeSFlorian Westphal sockptr_t optval = KERNEL_SOCKPTR(&val); 1241b3e7edeSFlorian Westphal struct sock *sk = (struct sock *)msk; 1251b3e7edeSFlorian Westphal int ret; 1261b3e7edeSFlorian Westphal 1271b3e7edeSFlorian Westphal ret = sock_setsockopt(sk->sk_socket, SOL_SOCKET, optname, 1281b3e7edeSFlorian Westphal optval, sizeof(val)); 1291b3e7edeSFlorian Westphal if (ret) 1301b3e7edeSFlorian Westphal return ret; 1311b3e7edeSFlorian Westphal 1321b3e7edeSFlorian Westphal mptcp_sol_socket_sync_intval(msk, optname, val); 1331b3e7edeSFlorian Westphal return 0; 1341b3e7edeSFlorian Westphal } 1351b3e7edeSFlorian Westphal 1366f0d7198SFlorian Westphal static void mptcp_so_incoming_cpu(struct mptcp_sock *msk, int val) 1376f0d7198SFlorian Westphal { 1386f0d7198SFlorian Westphal struct sock *sk = (struct sock *)msk; 1396f0d7198SFlorian Westphal 1406f0d7198SFlorian Westphal WRITE_ONCE(sk->sk_incoming_cpu, val); 1416f0d7198SFlorian Westphal 1426f0d7198SFlorian Westphal mptcp_sol_socket_sync_intval(msk, SO_INCOMING_CPU, val); 1436f0d7198SFlorian Westphal } 1446f0d7198SFlorian Westphal 1459061f24bSFlorian Westphal static int mptcp_setsockopt_sol_socket_tstamp(struct mptcp_sock *msk, int optname, int val) 1469061f24bSFlorian Westphal { 1479061f24bSFlorian Westphal sockptr_t optval = KERNEL_SOCKPTR(&val); 1489061f24bSFlorian Westphal struct mptcp_subflow_context *subflow; 1499061f24bSFlorian Westphal struct sock *sk = (struct sock *)msk; 1509061f24bSFlorian Westphal int ret; 1519061f24bSFlorian Westphal 1529061f24bSFlorian Westphal ret = sock_setsockopt(sk->sk_socket, SOL_SOCKET, optname, 1539061f24bSFlorian Westphal optval, sizeof(val)); 1549061f24bSFlorian Westphal if (ret) 1559061f24bSFlorian Westphal return ret; 1569061f24bSFlorian Westphal 1579061f24bSFlorian Westphal lock_sock(sk); 1589061f24bSFlorian Westphal mptcp_for_each_subflow(msk, subflow) { 1599061f24bSFlorian Westphal struct sock *ssk = mptcp_subflow_tcp_sock(subflow); 1609061f24bSFlorian Westphal bool slow = lock_sock_fast(ssk); 1619061f24bSFlorian Westphal 1629061f24bSFlorian Westphal sock_set_timestamp(sk, optname, !!val); 1639061f24bSFlorian Westphal unlock_sock_fast(ssk, slow); 1649061f24bSFlorian Westphal } 1659061f24bSFlorian Westphal 1669061f24bSFlorian Westphal release_sock(sk); 1679061f24bSFlorian Westphal return 0; 1689061f24bSFlorian Westphal } 1699061f24bSFlorian Westphal 1701b3e7edeSFlorian Westphal static int mptcp_setsockopt_sol_socket_int(struct mptcp_sock *msk, int optname, 1716c9a0a0fSYangbo Lu sockptr_t optval, 1726c9a0a0fSYangbo Lu unsigned int optlen) 1731b3e7edeSFlorian Westphal { 1741b3e7edeSFlorian Westphal int val, ret; 1751b3e7edeSFlorian Westphal 1761b3e7edeSFlorian Westphal ret = mptcp_get_int_option(msk, optval, optlen, &val); 1771b3e7edeSFlorian Westphal if (ret) 1781b3e7edeSFlorian Westphal return ret; 1791b3e7edeSFlorian Westphal 1801b3e7edeSFlorian Westphal switch (optname) { 1811b3e7edeSFlorian Westphal case SO_KEEPALIVE: 1821b3e7edeSFlorian Westphal mptcp_sol_socket_sync_intval(msk, optname, val); 1831b3e7edeSFlorian Westphal return 0; 184a03c99b2SFlorian Westphal case SO_DEBUG: 18536704413SFlorian Westphal case SO_MARK: 1861b3e7edeSFlorian Westphal case SO_PRIORITY: 1875d0a6bc8SFlorian Westphal case SO_SNDBUF: 1885d0a6bc8SFlorian Westphal case SO_SNDBUFFORCE: 1895d0a6bc8SFlorian Westphal case SO_RCVBUF: 1905d0a6bc8SFlorian Westphal case SO_RCVBUFFORCE: 1911b3e7edeSFlorian Westphal return mptcp_sol_socket_intval(msk, optname, val); 1926f0d7198SFlorian Westphal case SO_INCOMING_CPU: 1936f0d7198SFlorian Westphal mptcp_so_incoming_cpu(msk, val); 1946f0d7198SFlorian Westphal return 0; 1959061f24bSFlorian Westphal case SO_TIMESTAMP_OLD: 1969061f24bSFlorian Westphal case SO_TIMESTAMP_NEW: 1979061f24bSFlorian Westphal case SO_TIMESTAMPNS_OLD: 1989061f24bSFlorian Westphal case SO_TIMESTAMPNS_NEW: 1999061f24bSFlorian Westphal return mptcp_setsockopt_sol_socket_tstamp(msk, optname, val); 2001b3e7edeSFlorian Westphal } 2011b3e7edeSFlorian Westphal 2021b3e7edeSFlorian Westphal return -ENOPROTOOPT; 2031b3e7edeSFlorian Westphal } 2041b3e7edeSFlorian Westphal 2056c9a0a0fSYangbo Lu static int mptcp_setsockopt_sol_socket_timestamping(struct mptcp_sock *msk, 2066c9a0a0fSYangbo Lu int optname, 2076c9a0a0fSYangbo Lu sockptr_t optval, 2086c9a0a0fSYangbo Lu unsigned int optlen) 2096c9a0a0fSYangbo Lu { 2106c9a0a0fSYangbo Lu struct mptcp_subflow_context *subflow; 2116c9a0a0fSYangbo Lu struct sock *sk = (struct sock *)msk; 212d463126eSYangbo Lu struct so_timestamping timestamping; 213d463126eSYangbo Lu int ret; 2146c9a0a0fSYangbo Lu 215d463126eSYangbo Lu if (optlen == sizeof(timestamping)) { 216d463126eSYangbo Lu if (copy_from_sockptr(×tamping, optval, 217d463126eSYangbo Lu sizeof(timestamping))) 218d463126eSYangbo Lu return -EFAULT; 219d463126eSYangbo Lu } else if (optlen == sizeof(int)) { 220d463126eSYangbo Lu memset(×tamping, 0, sizeof(timestamping)); 221d463126eSYangbo Lu 222d463126eSYangbo Lu if (copy_from_sockptr(×tamping.flags, optval, sizeof(int))) 223d463126eSYangbo Lu return -EFAULT; 224d463126eSYangbo Lu } else { 225d463126eSYangbo Lu return -EINVAL; 226d463126eSYangbo Lu } 2276c9a0a0fSYangbo Lu 2286c9a0a0fSYangbo Lu ret = sock_setsockopt(sk->sk_socket, SOL_SOCKET, optname, 229d463126eSYangbo Lu KERNEL_SOCKPTR(×tamping), 230d463126eSYangbo Lu sizeof(timestamping)); 2316c9a0a0fSYangbo Lu if (ret) 2326c9a0a0fSYangbo Lu return ret; 2336c9a0a0fSYangbo Lu 2346c9a0a0fSYangbo Lu lock_sock(sk); 2356c9a0a0fSYangbo Lu 2366c9a0a0fSYangbo Lu mptcp_for_each_subflow(msk, subflow) { 2376c9a0a0fSYangbo Lu struct sock *ssk = mptcp_subflow_tcp_sock(subflow); 2386c9a0a0fSYangbo Lu bool slow = lock_sock_fast(ssk); 2396c9a0a0fSYangbo Lu 240d463126eSYangbo Lu sock_set_timestamping(sk, optname, timestamping); 2416c9a0a0fSYangbo Lu unlock_sock_fast(ssk, slow); 2426c9a0a0fSYangbo Lu } 2436c9a0a0fSYangbo Lu 2446c9a0a0fSYangbo Lu release_sock(sk); 2456c9a0a0fSYangbo Lu 2466c9a0a0fSYangbo Lu return 0; 2476c9a0a0fSYangbo Lu } 2486c9a0a0fSYangbo Lu 249268b1238SFlorian Westphal static int mptcp_setsockopt_sol_socket_linger(struct mptcp_sock *msk, sockptr_t optval, 250268b1238SFlorian Westphal unsigned int optlen) 251268b1238SFlorian Westphal { 252268b1238SFlorian Westphal struct mptcp_subflow_context *subflow; 253268b1238SFlorian Westphal struct sock *sk = (struct sock *)msk; 254268b1238SFlorian Westphal struct linger ling; 255268b1238SFlorian Westphal sockptr_t kopt; 256268b1238SFlorian Westphal int ret; 257268b1238SFlorian Westphal 258268b1238SFlorian Westphal if (optlen < sizeof(ling)) 259268b1238SFlorian Westphal return -EINVAL; 260268b1238SFlorian Westphal 261268b1238SFlorian Westphal if (copy_from_sockptr(&ling, optval, sizeof(ling))) 262268b1238SFlorian Westphal return -EFAULT; 263268b1238SFlorian Westphal 264268b1238SFlorian Westphal kopt = KERNEL_SOCKPTR(&ling); 265268b1238SFlorian Westphal ret = sock_setsockopt(sk->sk_socket, SOL_SOCKET, SO_LINGER, kopt, sizeof(ling)); 266268b1238SFlorian Westphal if (ret) 267268b1238SFlorian Westphal return ret; 268268b1238SFlorian Westphal 269268b1238SFlorian Westphal lock_sock(sk); 270268b1238SFlorian Westphal sockopt_seq_inc(msk); 271268b1238SFlorian Westphal mptcp_for_each_subflow(msk, subflow) { 272268b1238SFlorian Westphal struct sock *ssk = mptcp_subflow_tcp_sock(subflow); 273268b1238SFlorian Westphal bool slow = lock_sock_fast(ssk); 274268b1238SFlorian Westphal 275268b1238SFlorian Westphal if (!ling.l_onoff) { 276268b1238SFlorian Westphal sock_reset_flag(ssk, SOCK_LINGER); 277268b1238SFlorian Westphal } else { 278268b1238SFlorian Westphal ssk->sk_lingertime = sk->sk_lingertime; 279268b1238SFlorian Westphal sock_set_flag(ssk, SOCK_LINGER); 280268b1238SFlorian Westphal } 281268b1238SFlorian Westphal 282268b1238SFlorian Westphal subflow->setsockopt_seq = msk->setsockopt_seq; 283268b1238SFlorian Westphal unlock_sock_fast(ssk, slow); 284268b1238SFlorian Westphal } 285268b1238SFlorian Westphal 286268b1238SFlorian Westphal release_sock(sk); 287268b1238SFlorian Westphal return 0; 288268b1238SFlorian Westphal } 289268b1238SFlorian Westphal 2900abdde82SPaolo Abeni static int mptcp_setsockopt_sol_socket(struct mptcp_sock *msk, int optname, 2910abdde82SPaolo Abeni sockptr_t optval, unsigned int optlen) 2920abdde82SPaolo Abeni { 2930abdde82SPaolo Abeni struct sock *sk = (struct sock *)msk; 2940abdde82SPaolo Abeni struct socket *ssock; 2950abdde82SPaolo Abeni int ret; 2960abdde82SPaolo Abeni 2970abdde82SPaolo Abeni switch (optname) { 2980abdde82SPaolo Abeni case SO_REUSEPORT: 2990abdde82SPaolo Abeni case SO_REUSEADDR: 3005d0a6bc8SFlorian Westphal case SO_BINDTODEVICE: 3015d0a6bc8SFlorian Westphal case SO_BINDTOIFINDEX: 3020abdde82SPaolo Abeni lock_sock(sk); 3030abdde82SPaolo Abeni ssock = __mptcp_nmpc_socket(msk); 3040abdde82SPaolo Abeni if (!ssock) { 3050abdde82SPaolo Abeni release_sock(sk); 3060abdde82SPaolo Abeni return -EINVAL; 3070abdde82SPaolo Abeni } 3080abdde82SPaolo Abeni 3090abdde82SPaolo Abeni ret = sock_setsockopt(ssock, SOL_SOCKET, optname, optval, optlen); 3100abdde82SPaolo Abeni if (ret == 0) { 3110abdde82SPaolo Abeni if (optname == SO_REUSEPORT) 3120abdde82SPaolo Abeni sk->sk_reuseport = ssock->sk->sk_reuseport; 3130abdde82SPaolo Abeni else if (optname == SO_REUSEADDR) 3140abdde82SPaolo Abeni sk->sk_reuse = ssock->sk->sk_reuse; 3155d0a6bc8SFlorian Westphal else if (optname == SO_BINDTODEVICE) 3165d0a6bc8SFlorian Westphal sk->sk_bound_dev_if = ssock->sk->sk_bound_dev_if; 3175d0a6bc8SFlorian Westphal else if (optname == SO_BINDTOIFINDEX) 3185d0a6bc8SFlorian Westphal sk->sk_bound_dev_if = ssock->sk->sk_bound_dev_if; 3190abdde82SPaolo Abeni } 3200abdde82SPaolo Abeni release_sock(sk); 3210abdde82SPaolo Abeni return ret; 3221b3e7edeSFlorian Westphal case SO_KEEPALIVE: 3231b3e7edeSFlorian Westphal case SO_PRIORITY: 3245d0a6bc8SFlorian Westphal case SO_SNDBUF: 3255d0a6bc8SFlorian Westphal case SO_SNDBUFFORCE: 3265d0a6bc8SFlorian Westphal case SO_RCVBUF: 3275d0a6bc8SFlorian Westphal case SO_RCVBUFFORCE: 32836704413SFlorian Westphal case SO_MARK: 3296f0d7198SFlorian Westphal case SO_INCOMING_CPU: 330a03c99b2SFlorian Westphal case SO_DEBUG: 3319061f24bSFlorian Westphal case SO_TIMESTAMP_OLD: 3329061f24bSFlorian Westphal case SO_TIMESTAMP_NEW: 3339061f24bSFlorian Westphal case SO_TIMESTAMPNS_OLD: 3349061f24bSFlorian Westphal case SO_TIMESTAMPNS_NEW: 3356c9a0a0fSYangbo Lu return mptcp_setsockopt_sol_socket_int(msk, optname, optval, 3366c9a0a0fSYangbo Lu optlen); 3379061f24bSFlorian Westphal case SO_TIMESTAMPING_OLD: 3389061f24bSFlorian Westphal case SO_TIMESTAMPING_NEW: 3396c9a0a0fSYangbo Lu return mptcp_setsockopt_sol_socket_timestamping(msk, optname, 3406c9a0a0fSYangbo Lu optval, optlen); 341268b1238SFlorian Westphal case SO_LINGER: 342268b1238SFlorian Westphal return mptcp_setsockopt_sol_socket_linger(msk, optval, optlen); 3437a009a70SFlorian Westphal case SO_RCVLOWAT: 3447a009a70SFlorian Westphal case SO_RCVTIMEO_OLD: 3457a009a70SFlorian Westphal case SO_RCVTIMEO_NEW: 346d6ab5ea2SGeliang Tang case SO_SNDTIMEO_OLD: 347d6ab5ea2SGeliang Tang case SO_SNDTIMEO_NEW: 3487a009a70SFlorian Westphal case SO_BUSY_POLL: 3497a009a70SFlorian Westphal case SO_PREFER_BUSY_POLL: 3507a009a70SFlorian Westphal case SO_BUSY_POLL_BUDGET: 3517a009a70SFlorian Westphal /* No need to copy: only relevant for msk */ 3527a009a70SFlorian Westphal return sock_setsockopt(sk->sk_socket, SOL_SOCKET, optname, optval, optlen); 353a03c99b2SFlorian Westphal case SO_NO_CHECK: 354a03c99b2SFlorian Westphal case SO_DONTROUTE: 355a03c99b2SFlorian Westphal case SO_BROADCAST: 356a03c99b2SFlorian Westphal case SO_BSDCOMPAT: 357a03c99b2SFlorian Westphal case SO_PASSCRED: 358a03c99b2SFlorian Westphal case SO_PASSSEC: 359a03c99b2SFlorian Westphal case SO_RXQ_OVFL: 360a03c99b2SFlorian Westphal case SO_WIFI_STATUS: 361a03c99b2SFlorian Westphal case SO_NOFCS: 362a03c99b2SFlorian Westphal case SO_SELECT_ERR_QUEUE: 363a03c99b2SFlorian Westphal return 0; 3640abdde82SPaolo Abeni } 3650abdde82SPaolo Abeni 3667a009a70SFlorian Westphal /* SO_OOBINLINE is not supported, let's avoid the related mess 3677a009a70SFlorian Westphal * SO_ATTACH_FILTER, SO_ATTACH_BPF, SO_ATTACH_REUSEPORT_CBPF, 3687a009a70SFlorian Westphal * SO_DETACH_REUSEPORT_BPF, SO_DETACH_FILTER, SO_LOCK_FILTER, 3697a009a70SFlorian Westphal * we must be careful with subflows 3707a009a70SFlorian Westphal * 3717a009a70SFlorian Westphal * SO_ATTACH_REUSEPORT_EBPF is not supported, at it checks 3727a009a70SFlorian Westphal * explicitly the sk_protocol field 3737a009a70SFlorian Westphal * 3747a009a70SFlorian Westphal * SO_PEEK_OFF is unsupported, as it is for plain TCP 3757a009a70SFlorian Westphal * SO_MAX_PACING_RATE is unsupported, we must be careful with subflows 3767a009a70SFlorian Westphal * SO_CNX_ADVICE is currently unsupported, could possibly be relevant, 3777a009a70SFlorian Westphal * but likely needs careful design 3787a009a70SFlorian Westphal * 3797a009a70SFlorian Westphal * SO_ZEROCOPY is currently unsupported, TODO in sndmsg 3807a009a70SFlorian Westphal * SO_TXTIME is currently unsupported 3817a009a70SFlorian Westphal */ 3827a009a70SFlorian Westphal 3837a009a70SFlorian Westphal return -EOPNOTSUPP; 3840abdde82SPaolo Abeni } 3850abdde82SPaolo Abeni 3860abdde82SPaolo Abeni static int mptcp_setsockopt_v6(struct mptcp_sock *msk, int optname, 3870abdde82SPaolo Abeni sockptr_t optval, unsigned int optlen) 3880abdde82SPaolo Abeni { 3890abdde82SPaolo Abeni struct sock *sk = (struct sock *)msk; 3900abdde82SPaolo Abeni int ret = -EOPNOTSUPP; 3910abdde82SPaolo Abeni struct socket *ssock; 3920abdde82SPaolo Abeni 3930abdde82SPaolo Abeni switch (optname) { 3940abdde82SPaolo Abeni case IPV6_V6ONLY: 395c9406a23SFlorian Westphal case IPV6_TRANSPARENT: 396c9406a23SFlorian Westphal case IPV6_FREEBIND: 3970abdde82SPaolo Abeni lock_sock(sk); 3980abdde82SPaolo Abeni ssock = __mptcp_nmpc_socket(msk); 3990abdde82SPaolo Abeni if (!ssock) { 4000abdde82SPaolo Abeni release_sock(sk); 4010abdde82SPaolo Abeni return -EINVAL; 4020abdde82SPaolo Abeni } 4030abdde82SPaolo Abeni 4040abdde82SPaolo Abeni ret = tcp_setsockopt(ssock->sk, SOL_IPV6, optname, optval, optlen); 405c9406a23SFlorian Westphal if (ret != 0) { 406c9406a23SFlorian Westphal release_sock(sk); 407c9406a23SFlorian Westphal return ret; 408c9406a23SFlorian Westphal } 409c9406a23SFlorian Westphal 410c9406a23SFlorian Westphal sockopt_seq_inc(msk); 411c9406a23SFlorian Westphal 412c9406a23SFlorian Westphal switch (optname) { 413c9406a23SFlorian Westphal case IPV6_V6ONLY: 4140abdde82SPaolo Abeni sk->sk_ipv6only = ssock->sk->sk_ipv6only; 415c9406a23SFlorian Westphal break; 416c9406a23SFlorian Westphal case IPV6_TRANSPARENT: 417c9406a23SFlorian Westphal inet_sk(sk)->transparent = inet_sk(ssock->sk)->transparent; 418c9406a23SFlorian Westphal break; 419c9406a23SFlorian Westphal case IPV6_FREEBIND: 420c9406a23SFlorian Westphal inet_sk(sk)->freebind = inet_sk(ssock->sk)->freebind; 421c9406a23SFlorian Westphal break; 422c9406a23SFlorian Westphal } 4230abdde82SPaolo Abeni 4240abdde82SPaolo Abeni release_sock(sk); 4250abdde82SPaolo Abeni break; 4260abdde82SPaolo Abeni } 4270abdde82SPaolo Abeni 4280abdde82SPaolo Abeni return ret; 4290abdde82SPaolo Abeni } 4300abdde82SPaolo Abeni 431d9e4c129SPaolo Abeni static bool mptcp_supported_sockopt(int level, int optname) 432d9e4c129SPaolo Abeni { 433d9e4c129SPaolo Abeni if (level == SOL_IP) { 434d9e4c129SPaolo Abeni switch (optname) { 435d9e4c129SPaolo Abeni /* should work fine */ 436d9e4c129SPaolo Abeni case IP_FREEBIND: 437d9e4c129SPaolo Abeni case IP_TRANSPARENT: 438d9e4c129SPaolo Abeni 439d9e4c129SPaolo Abeni /* the following are control cmsg related */ 440d9e4c129SPaolo Abeni case IP_PKTINFO: 441d9e4c129SPaolo Abeni case IP_RECVTTL: 442d9e4c129SPaolo Abeni case IP_RECVTOS: 443d9e4c129SPaolo Abeni case IP_RECVOPTS: 444d9e4c129SPaolo Abeni case IP_RETOPTS: 445d9e4c129SPaolo Abeni case IP_PASSSEC: 446d9e4c129SPaolo Abeni case IP_RECVORIGDSTADDR: 447d9e4c129SPaolo Abeni case IP_CHECKSUM: 448d9e4c129SPaolo Abeni case IP_RECVFRAGSIZE: 449d9e4c129SPaolo Abeni 450d9e4c129SPaolo Abeni /* common stuff that need some love */ 451d9e4c129SPaolo Abeni case IP_TOS: 452d9e4c129SPaolo Abeni case IP_TTL: 453d9e4c129SPaolo Abeni case IP_BIND_ADDRESS_NO_PORT: 454d9e4c129SPaolo Abeni case IP_MTU_DISCOVER: 455d9e4c129SPaolo Abeni case IP_RECVERR: 456d9e4c129SPaolo Abeni 457d9e4c129SPaolo Abeni /* possibly less common may deserve some love */ 458d9e4c129SPaolo Abeni case IP_MINTTL: 459d9e4c129SPaolo Abeni 460d9e4c129SPaolo Abeni /* the following is apparently a no-op for plain TCP */ 461d9e4c129SPaolo Abeni case IP_RECVERR_RFC4884: 462d9e4c129SPaolo Abeni return true; 463d9e4c129SPaolo Abeni } 464d9e4c129SPaolo Abeni 465d9e4c129SPaolo Abeni /* IP_OPTIONS is not supported, needs subflow care */ 466d9e4c129SPaolo Abeni /* IP_HDRINCL, IP_NODEFRAG are not supported, RAW specific */ 467d9e4c129SPaolo Abeni /* IP_MULTICAST_TTL, IP_MULTICAST_LOOP, IP_UNICAST_IF, 468d9e4c129SPaolo Abeni * IP_ADD_MEMBERSHIP, IP_ADD_SOURCE_MEMBERSHIP, IP_DROP_MEMBERSHIP, 469d9e4c129SPaolo Abeni * IP_DROP_SOURCE_MEMBERSHIP, IP_BLOCK_SOURCE, IP_UNBLOCK_SOURCE, 470d9e4c129SPaolo Abeni * MCAST_JOIN_GROUP, MCAST_LEAVE_GROUP MCAST_JOIN_SOURCE_GROUP, 471d9e4c129SPaolo Abeni * MCAST_LEAVE_SOURCE_GROUP, MCAST_BLOCK_SOURCE, MCAST_UNBLOCK_SOURCE, 472d9e4c129SPaolo Abeni * MCAST_MSFILTER, IP_MULTICAST_ALL are not supported, better not deal 473d9e4c129SPaolo Abeni * with mcast stuff 474d9e4c129SPaolo Abeni */ 475d9e4c129SPaolo Abeni /* IP_IPSEC_POLICY, IP_XFRM_POLICY are nut supported, unrelated here */ 476d9e4c129SPaolo Abeni return false; 477d9e4c129SPaolo Abeni } 478d9e4c129SPaolo Abeni if (level == SOL_IPV6) { 479d9e4c129SPaolo Abeni switch (optname) { 480d9e4c129SPaolo Abeni case IPV6_V6ONLY: 481d9e4c129SPaolo Abeni 482d9e4c129SPaolo Abeni /* the following are control cmsg related */ 483d9e4c129SPaolo Abeni case IPV6_RECVPKTINFO: 484d9e4c129SPaolo Abeni case IPV6_2292PKTINFO: 485d9e4c129SPaolo Abeni case IPV6_RECVHOPLIMIT: 486d9e4c129SPaolo Abeni case IPV6_2292HOPLIMIT: 487d9e4c129SPaolo Abeni case IPV6_RECVRTHDR: 488d9e4c129SPaolo Abeni case IPV6_2292RTHDR: 489d9e4c129SPaolo Abeni case IPV6_RECVHOPOPTS: 490d9e4c129SPaolo Abeni case IPV6_2292HOPOPTS: 491d9e4c129SPaolo Abeni case IPV6_RECVDSTOPTS: 492d9e4c129SPaolo Abeni case IPV6_2292DSTOPTS: 493d9e4c129SPaolo Abeni case IPV6_RECVTCLASS: 494d9e4c129SPaolo Abeni case IPV6_FLOWINFO: 495d9e4c129SPaolo Abeni case IPV6_RECVPATHMTU: 496d9e4c129SPaolo Abeni case IPV6_RECVORIGDSTADDR: 497d9e4c129SPaolo Abeni case IPV6_RECVFRAGSIZE: 498d9e4c129SPaolo Abeni 499d9e4c129SPaolo Abeni /* the following ones need some love but are quite common */ 500d9e4c129SPaolo Abeni case IPV6_TCLASS: 501d9e4c129SPaolo Abeni case IPV6_TRANSPARENT: 502d9e4c129SPaolo Abeni case IPV6_FREEBIND: 503d9e4c129SPaolo Abeni case IPV6_PKTINFO: 504d9e4c129SPaolo Abeni case IPV6_2292PKTOPTIONS: 505d9e4c129SPaolo Abeni case IPV6_UNICAST_HOPS: 506d9e4c129SPaolo Abeni case IPV6_MTU_DISCOVER: 507d9e4c129SPaolo Abeni case IPV6_MTU: 508d9e4c129SPaolo Abeni case IPV6_RECVERR: 509d9e4c129SPaolo Abeni case IPV6_FLOWINFO_SEND: 510d9e4c129SPaolo Abeni case IPV6_FLOWLABEL_MGR: 511d9e4c129SPaolo Abeni case IPV6_MINHOPCOUNT: 512d9e4c129SPaolo Abeni case IPV6_DONTFRAG: 513d9e4c129SPaolo Abeni case IPV6_AUTOFLOWLABEL: 514d9e4c129SPaolo Abeni 515d9e4c129SPaolo Abeni /* the following one is a no-op for plain TCP */ 516d9e4c129SPaolo Abeni case IPV6_RECVERR_RFC4884: 517d9e4c129SPaolo Abeni return true; 518d9e4c129SPaolo Abeni } 519d9e4c129SPaolo Abeni 520d9e4c129SPaolo Abeni /* IPV6_HOPOPTS, IPV6_RTHDRDSTOPTS, IPV6_RTHDR, IPV6_DSTOPTS are 521d9e4c129SPaolo Abeni * not supported 522d9e4c129SPaolo Abeni */ 523d9e4c129SPaolo Abeni /* IPV6_MULTICAST_HOPS, IPV6_MULTICAST_LOOP, IPV6_UNICAST_IF, 524d9e4c129SPaolo Abeni * IPV6_MULTICAST_IF, IPV6_ADDRFORM, 525d9e4c129SPaolo Abeni * IPV6_ADD_MEMBERSHIP, IPV6_DROP_MEMBERSHIP, IPV6_JOIN_ANYCAST, 526d9e4c129SPaolo Abeni * IPV6_LEAVE_ANYCAST, IPV6_MULTICAST_ALL, MCAST_JOIN_GROUP, MCAST_LEAVE_GROUP, 527d9e4c129SPaolo Abeni * MCAST_JOIN_SOURCE_GROUP, MCAST_LEAVE_SOURCE_GROUP, 528d9e4c129SPaolo Abeni * MCAST_BLOCK_SOURCE, MCAST_UNBLOCK_SOURCE, MCAST_MSFILTER 529d9e4c129SPaolo Abeni * are not supported better not deal with mcast 530d9e4c129SPaolo Abeni */ 531d9e4c129SPaolo Abeni /* IPV6_ROUTER_ALERT, IPV6_ROUTER_ALERT_ISOLATE are not supported, since are evil */ 532d9e4c129SPaolo Abeni 533d9e4c129SPaolo Abeni /* IPV6_IPSEC_POLICY, IPV6_XFRM_POLICY are not supported */ 534d9e4c129SPaolo Abeni /* IPV6_ADDR_PREFERENCES is not supported, we must be careful with subflows */ 535d9e4c129SPaolo Abeni return false; 536d9e4c129SPaolo Abeni } 537d9e4c129SPaolo Abeni if (level == SOL_TCP) { 538d9e4c129SPaolo Abeni switch (optname) { 539d9e4c129SPaolo Abeni /* the following are no-op or should work just fine */ 540d9e4c129SPaolo Abeni case TCP_THIN_DUPACK: 541d9e4c129SPaolo Abeni case TCP_DEFER_ACCEPT: 542d9e4c129SPaolo Abeni 543d9e4c129SPaolo Abeni /* the following need some love */ 544d9e4c129SPaolo Abeni case TCP_MAXSEG: 545d9e4c129SPaolo Abeni case TCP_NODELAY: 546d9e4c129SPaolo Abeni case TCP_THIN_LINEAR_TIMEOUTS: 547d9e4c129SPaolo Abeni case TCP_CONGESTION: 548d9e4c129SPaolo Abeni case TCP_CORK: 549d9e4c129SPaolo Abeni case TCP_KEEPIDLE: 550d9e4c129SPaolo Abeni case TCP_KEEPINTVL: 551d9e4c129SPaolo Abeni case TCP_KEEPCNT: 552d9e4c129SPaolo Abeni case TCP_SYNCNT: 553d9e4c129SPaolo Abeni case TCP_SAVE_SYN: 554d9e4c129SPaolo Abeni case TCP_LINGER2: 555d9e4c129SPaolo Abeni case TCP_WINDOW_CLAMP: 556d9e4c129SPaolo Abeni case TCP_QUICKACK: 557d9e4c129SPaolo Abeni case TCP_USER_TIMEOUT: 558d9e4c129SPaolo Abeni case TCP_TIMESTAMP: 559d9e4c129SPaolo Abeni case TCP_NOTSENT_LOWAT: 560d9e4c129SPaolo Abeni case TCP_TX_DELAY: 5612c9e7765SFlorian Westphal case TCP_INQ: 5624ffb0a02SDmytro Shytyi case TCP_FASTOPEN: 56354635bd0SBenjamin Hesmans case TCP_FASTOPEN_CONNECT: 564*cb99816cSMatthieu Baerts case TCP_FASTOPEN_KEY: 565e64d4debSMatthieu Baerts case TCP_FASTOPEN_NO_COOKIE: 566d9e4c129SPaolo Abeni return true; 567d9e4c129SPaolo Abeni } 568d9e4c129SPaolo Abeni 569d9e4c129SPaolo Abeni /* TCP_MD5SIG, TCP_MD5SIG_EXT are not supported, MD5 is not compatible with MPTCP */ 570d9e4c129SPaolo Abeni 571d9e4c129SPaolo Abeni /* TCP_REPAIR, TCP_REPAIR_QUEUE, TCP_QUEUE_SEQ, TCP_REPAIR_OPTIONS, 572d9e4c129SPaolo Abeni * TCP_REPAIR_WINDOW are not supported, better avoid this mess 573d9e4c129SPaolo Abeni */ 574d9e4c129SPaolo Abeni } 575d9e4c129SPaolo Abeni return false; 576d9e4c129SPaolo Abeni } 577d9e4c129SPaolo Abeni 578aa1fbd94SFlorian Westphal static int mptcp_setsockopt_sol_tcp_congestion(struct mptcp_sock *msk, sockptr_t optval, 579aa1fbd94SFlorian Westphal unsigned int optlen) 580aa1fbd94SFlorian Westphal { 581aa1fbd94SFlorian Westphal struct mptcp_subflow_context *subflow; 582aa1fbd94SFlorian Westphal struct sock *sk = (struct sock *)msk; 583aa1fbd94SFlorian Westphal char name[TCP_CA_NAME_MAX]; 584aa1fbd94SFlorian Westphal bool cap_net_admin; 585aa1fbd94SFlorian Westphal int ret; 586aa1fbd94SFlorian Westphal 587aa1fbd94SFlorian Westphal if (optlen < 1) 588aa1fbd94SFlorian Westphal return -EINVAL; 589aa1fbd94SFlorian Westphal 590aa1fbd94SFlorian Westphal ret = strncpy_from_sockptr(name, optval, 591aa1fbd94SFlorian Westphal min_t(long, TCP_CA_NAME_MAX - 1, optlen)); 592aa1fbd94SFlorian Westphal if (ret < 0) 593aa1fbd94SFlorian Westphal return -EFAULT; 594aa1fbd94SFlorian Westphal 595aa1fbd94SFlorian Westphal name[ret] = 0; 596aa1fbd94SFlorian Westphal 597aa1fbd94SFlorian Westphal cap_net_admin = ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN); 598aa1fbd94SFlorian Westphal 599aa1fbd94SFlorian Westphal ret = 0; 600aa1fbd94SFlorian Westphal lock_sock(sk); 601aa1fbd94SFlorian Westphal sockopt_seq_inc(msk); 602aa1fbd94SFlorian Westphal mptcp_for_each_subflow(msk, subflow) { 603aa1fbd94SFlorian Westphal struct sock *ssk = mptcp_subflow_tcp_sock(subflow); 604aa1fbd94SFlorian Westphal int err; 605aa1fbd94SFlorian Westphal 606aa1fbd94SFlorian Westphal lock_sock(ssk); 607aa1fbd94SFlorian Westphal err = tcp_set_congestion_control(ssk, name, true, cap_net_admin); 608aa1fbd94SFlorian Westphal if (err < 0 && ret == 0) 609aa1fbd94SFlorian Westphal ret = err; 610aa1fbd94SFlorian Westphal subflow->setsockopt_seq = msk->setsockopt_seq; 611aa1fbd94SFlorian Westphal release_sock(ssk); 612aa1fbd94SFlorian Westphal } 613aa1fbd94SFlorian Westphal 614aa1fbd94SFlorian Westphal if (ret == 0) 61520b5759fSPaolo Abeni strcpy(msk->ca_name, name); 616aa1fbd94SFlorian Westphal 617aa1fbd94SFlorian Westphal release_sock(sk); 618aa1fbd94SFlorian Westphal return ret; 619aa1fbd94SFlorian Westphal } 620aa1fbd94SFlorian Westphal 6214f6e14bdSMaxim Galaganov static int mptcp_setsockopt_sol_tcp_cork(struct mptcp_sock *msk, sockptr_t optval, 6224f6e14bdSMaxim Galaganov unsigned int optlen) 6234f6e14bdSMaxim Galaganov { 6244f6e14bdSMaxim Galaganov struct mptcp_subflow_context *subflow; 6254f6e14bdSMaxim Galaganov struct sock *sk = (struct sock *)msk; 6264f6e14bdSMaxim Galaganov int val; 6274f6e14bdSMaxim Galaganov 6284f6e14bdSMaxim Galaganov if (optlen < sizeof(int)) 6294f6e14bdSMaxim Galaganov return -EINVAL; 6304f6e14bdSMaxim Galaganov 6314f6e14bdSMaxim Galaganov if (copy_from_sockptr(&val, optval, sizeof(val))) 6324f6e14bdSMaxim Galaganov return -EFAULT; 6334f6e14bdSMaxim Galaganov 6344f6e14bdSMaxim Galaganov lock_sock(sk); 6354f6e14bdSMaxim Galaganov sockopt_seq_inc(msk); 6364f6e14bdSMaxim Galaganov msk->cork = !!val; 6374f6e14bdSMaxim Galaganov mptcp_for_each_subflow(msk, subflow) { 6384f6e14bdSMaxim Galaganov struct sock *ssk = mptcp_subflow_tcp_sock(subflow); 6394f6e14bdSMaxim Galaganov 6404f6e14bdSMaxim Galaganov lock_sock(ssk); 6414f6e14bdSMaxim Galaganov __tcp_sock_set_cork(ssk, !!val); 6424f6e14bdSMaxim Galaganov release_sock(ssk); 6434f6e14bdSMaxim Galaganov } 6444f6e14bdSMaxim Galaganov if (!val) 6454f6e14bdSMaxim Galaganov mptcp_check_and_set_pending(sk); 6464f6e14bdSMaxim Galaganov release_sock(sk); 6474f6e14bdSMaxim Galaganov 6484f6e14bdSMaxim Galaganov return 0; 6494f6e14bdSMaxim Galaganov } 6504f6e14bdSMaxim Galaganov 6514f6e14bdSMaxim Galaganov static int mptcp_setsockopt_sol_tcp_nodelay(struct mptcp_sock *msk, sockptr_t optval, 6524f6e14bdSMaxim Galaganov unsigned int optlen) 6534f6e14bdSMaxim Galaganov { 6544f6e14bdSMaxim Galaganov struct mptcp_subflow_context *subflow; 6554f6e14bdSMaxim Galaganov struct sock *sk = (struct sock *)msk; 6564f6e14bdSMaxim Galaganov int val; 6574f6e14bdSMaxim Galaganov 6584f6e14bdSMaxim Galaganov if (optlen < sizeof(int)) 6594f6e14bdSMaxim Galaganov return -EINVAL; 6604f6e14bdSMaxim Galaganov 6614f6e14bdSMaxim Galaganov if (copy_from_sockptr(&val, optval, sizeof(val))) 6624f6e14bdSMaxim Galaganov return -EFAULT; 6634f6e14bdSMaxim Galaganov 6644f6e14bdSMaxim Galaganov lock_sock(sk); 6654f6e14bdSMaxim Galaganov sockopt_seq_inc(msk); 6664f6e14bdSMaxim Galaganov msk->nodelay = !!val; 6674f6e14bdSMaxim Galaganov mptcp_for_each_subflow(msk, subflow) { 6684f6e14bdSMaxim Galaganov struct sock *ssk = mptcp_subflow_tcp_sock(subflow); 6694f6e14bdSMaxim Galaganov 6704f6e14bdSMaxim Galaganov lock_sock(ssk); 6714f6e14bdSMaxim Galaganov __tcp_sock_set_nodelay(ssk, !!val); 6724f6e14bdSMaxim Galaganov release_sock(ssk); 6734f6e14bdSMaxim Galaganov } 6744f6e14bdSMaxim Galaganov if (val) 6754f6e14bdSMaxim Galaganov mptcp_check_and_set_pending(sk); 6764f6e14bdSMaxim Galaganov release_sock(sk); 6774f6e14bdSMaxim Galaganov 6784f6e14bdSMaxim Galaganov return 0; 6794f6e14bdSMaxim Galaganov } 6804f6e14bdSMaxim Galaganov 681c9406a23SFlorian Westphal static int mptcp_setsockopt_sol_ip_set_transparent(struct mptcp_sock *msk, int optname, 682c9406a23SFlorian Westphal sockptr_t optval, unsigned int optlen) 683c9406a23SFlorian Westphal { 684c9406a23SFlorian Westphal struct sock *sk = (struct sock *)msk; 685c9406a23SFlorian Westphal struct inet_sock *issk; 686c9406a23SFlorian Westphal struct socket *ssock; 687c9406a23SFlorian Westphal int err; 688c9406a23SFlorian Westphal 689c9406a23SFlorian Westphal err = ip_setsockopt(sk, SOL_IP, optname, optval, optlen); 690c9406a23SFlorian Westphal if (err != 0) 691c9406a23SFlorian Westphal return err; 692c9406a23SFlorian Westphal 693c9406a23SFlorian Westphal lock_sock(sk); 694c9406a23SFlorian Westphal 695c9406a23SFlorian Westphal ssock = __mptcp_nmpc_socket(msk); 696c9406a23SFlorian Westphal if (!ssock) { 697c9406a23SFlorian Westphal release_sock(sk); 698c9406a23SFlorian Westphal return -EINVAL; 699c9406a23SFlorian Westphal } 700c9406a23SFlorian Westphal 701c9406a23SFlorian Westphal issk = inet_sk(ssock->sk); 702c9406a23SFlorian Westphal 703c9406a23SFlorian Westphal switch (optname) { 704c9406a23SFlorian Westphal case IP_FREEBIND: 705c9406a23SFlorian Westphal issk->freebind = inet_sk(sk)->freebind; 706c9406a23SFlorian Westphal break; 707c9406a23SFlorian Westphal case IP_TRANSPARENT: 708c9406a23SFlorian Westphal issk->transparent = inet_sk(sk)->transparent; 709c9406a23SFlorian Westphal break; 710c9406a23SFlorian Westphal default: 711c9406a23SFlorian Westphal release_sock(sk); 712c9406a23SFlorian Westphal WARN_ON_ONCE(1); 713c9406a23SFlorian Westphal return -EOPNOTSUPP; 714c9406a23SFlorian Westphal } 715c9406a23SFlorian Westphal 716c9406a23SFlorian Westphal sockopt_seq_inc(msk); 717c9406a23SFlorian Westphal release_sock(sk); 718c9406a23SFlorian Westphal return 0; 719c9406a23SFlorian Westphal } 720c9406a23SFlorian Westphal 721ffcacff8SPoorva Sonparote static int mptcp_setsockopt_v4_set_tos(struct mptcp_sock *msk, int optname, 722ffcacff8SPoorva Sonparote sockptr_t optval, unsigned int optlen) 723ffcacff8SPoorva Sonparote { 724ffcacff8SPoorva Sonparote struct mptcp_subflow_context *subflow; 725ffcacff8SPoorva Sonparote struct sock *sk = (struct sock *)msk; 726ffcacff8SPoorva Sonparote int err, val; 727ffcacff8SPoorva Sonparote 728ffcacff8SPoorva Sonparote err = ip_setsockopt(sk, SOL_IP, optname, optval, optlen); 729ffcacff8SPoorva Sonparote 730ffcacff8SPoorva Sonparote if (err != 0) 731ffcacff8SPoorva Sonparote return err; 732ffcacff8SPoorva Sonparote 733ffcacff8SPoorva Sonparote lock_sock(sk); 734ffcacff8SPoorva Sonparote sockopt_seq_inc(msk); 735ffcacff8SPoorva Sonparote val = inet_sk(sk)->tos; 736ffcacff8SPoorva Sonparote mptcp_for_each_subflow(msk, subflow) { 737ffcacff8SPoorva Sonparote struct sock *ssk = mptcp_subflow_tcp_sock(subflow); 738ffcacff8SPoorva Sonparote 739ffcacff8SPoorva Sonparote __ip_sock_set_tos(ssk, val); 740ffcacff8SPoorva Sonparote } 741ffcacff8SPoorva Sonparote release_sock(sk); 742ffcacff8SPoorva Sonparote 743ffcacff8SPoorva Sonparote return err; 744ffcacff8SPoorva Sonparote } 745ffcacff8SPoorva Sonparote 746ffcacff8SPoorva Sonparote static int mptcp_setsockopt_v4(struct mptcp_sock *msk, int optname, 747ffcacff8SPoorva Sonparote sockptr_t optval, unsigned int optlen) 748ffcacff8SPoorva Sonparote { 749ffcacff8SPoorva Sonparote switch (optname) { 750c9406a23SFlorian Westphal case IP_FREEBIND: 751c9406a23SFlorian Westphal case IP_TRANSPARENT: 752c9406a23SFlorian Westphal return mptcp_setsockopt_sol_ip_set_transparent(msk, optname, optval, optlen); 753ffcacff8SPoorva Sonparote case IP_TOS: 754ffcacff8SPoorva Sonparote return mptcp_setsockopt_v4_set_tos(msk, optname, optval, optlen); 755ffcacff8SPoorva Sonparote } 756ffcacff8SPoorva Sonparote 757ffcacff8SPoorva Sonparote return -EOPNOTSUPP; 758ffcacff8SPoorva Sonparote } 759ffcacff8SPoorva Sonparote 760d3d42904SMatthieu Baerts static int mptcp_setsockopt_first_sf_only(struct mptcp_sock *msk, int level, int optname, 761d3d42904SMatthieu Baerts sockptr_t optval, unsigned int optlen) 76254635bd0SBenjamin Hesmans { 76354635bd0SBenjamin Hesmans struct socket *sock; 76454635bd0SBenjamin Hesmans 765d3d42904SMatthieu Baerts /* Limit to first subflow, before the connection establishment */ 76654635bd0SBenjamin Hesmans sock = __mptcp_nmpc_socket(msk); 76754635bd0SBenjamin Hesmans if (!sock) 76854635bd0SBenjamin Hesmans return -EINVAL; 76954635bd0SBenjamin Hesmans 770d3d42904SMatthieu Baerts return tcp_setsockopt(sock->sk, level, optname, optval, optlen); 77154635bd0SBenjamin Hesmans } 77254635bd0SBenjamin Hesmans 773aa1fbd94SFlorian Westphal static int mptcp_setsockopt_sol_tcp(struct mptcp_sock *msk, int optname, 774aa1fbd94SFlorian Westphal sockptr_t optval, unsigned int optlen) 775aa1fbd94SFlorian Westphal { 7762c9e7765SFlorian Westphal struct sock *sk = (void *)msk; 7772c9e7765SFlorian Westphal int ret, val; 7782c9e7765SFlorian Westphal 779aa1fbd94SFlorian Westphal switch (optname) { 7802c9e7765SFlorian Westphal case TCP_INQ: 7812c9e7765SFlorian Westphal ret = mptcp_get_int_option(msk, optval, optlen, &val); 7822c9e7765SFlorian Westphal if (ret) 7832c9e7765SFlorian Westphal return ret; 7842c9e7765SFlorian Westphal if (val < 0 || val > 1) 7852c9e7765SFlorian Westphal return -EINVAL; 7862c9e7765SFlorian Westphal 7872c9e7765SFlorian Westphal lock_sock(sk); 7882c9e7765SFlorian Westphal msk->recvmsg_inq = !!val; 7892c9e7765SFlorian Westphal release_sock(sk); 7902c9e7765SFlorian Westphal return 0; 791aa1fbd94SFlorian Westphal case TCP_ULP: 792aa1fbd94SFlorian Westphal return -EOPNOTSUPP; 793aa1fbd94SFlorian Westphal case TCP_CONGESTION: 794aa1fbd94SFlorian Westphal return mptcp_setsockopt_sol_tcp_congestion(msk, optval, optlen); 7954f6e14bdSMaxim Galaganov case TCP_CORK: 7964f6e14bdSMaxim Galaganov return mptcp_setsockopt_sol_tcp_cork(msk, optval, optlen); 7974f6e14bdSMaxim Galaganov case TCP_NODELAY: 7984f6e14bdSMaxim Galaganov return mptcp_setsockopt_sol_tcp_nodelay(msk, optval, optlen); 799ea1e301dSFlorian Westphal case TCP_DEFER_ACCEPT: 800caea6467SMatthieu Baerts /* See tcp.c: TCP_DEFER_ACCEPT does not fail */ 801caea6467SMatthieu Baerts mptcp_setsockopt_first_sf_only(msk, SOL_TCP, optname, optval, optlen); 802caea6467SMatthieu Baerts return 0; 8034ffb0a02SDmytro Shytyi case TCP_FASTOPEN: 80454635bd0SBenjamin Hesmans case TCP_FASTOPEN_CONNECT: 805*cb99816cSMatthieu Baerts case TCP_FASTOPEN_KEY: 806e64d4debSMatthieu Baerts case TCP_FASTOPEN_NO_COOKIE: 807d3d42904SMatthieu Baerts return mptcp_setsockopt_first_sf_only(msk, SOL_TCP, optname, 808d3d42904SMatthieu Baerts optval, optlen); 809aa1fbd94SFlorian Westphal } 810aa1fbd94SFlorian Westphal 811aa1fbd94SFlorian Westphal return -EOPNOTSUPP; 812aa1fbd94SFlorian Westphal } 813aa1fbd94SFlorian Westphal 8140abdde82SPaolo Abeni int mptcp_setsockopt(struct sock *sk, int level, int optname, 8150abdde82SPaolo Abeni sockptr_t optval, unsigned int optlen) 8160abdde82SPaolo Abeni { 8170abdde82SPaolo Abeni struct mptcp_sock *msk = mptcp_sk(sk); 8180abdde82SPaolo Abeni struct sock *ssk; 8190abdde82SPaolo Abeni 8200abdde82SPaolo Abeni pr_debug("msk=%p", msk); 8210abdde82SPaolo Abeni 8220abdde82SPaolo Abeni if (level == SOL_SOCKET) 8230abdde82SPaolo Abeni return mptcp_setsockopt_sol_socket(msk, optname, optval, optlen); 8240abdde82SPaolo Abeni 8257a009a70SFlorian Westphal if (!mptcp_supported_sockopt(level, optname)) 8267a009a70SFlorian Westphal return -ENOPROTOOPT; 8277a009a70SFlorian Westphal 8280abdde82SPaolo Abeni /* @@ the meaning of setsockopt() when the socket is connected and 8290abdde82SPaolo Abeni * there are multiple subflows is not yet defined. It is up to the 8300abdde82SPaolo Abeni * MPTCP-level socket to configure the subflows until the subflow 8310abdde82SPaolo Abeni * is in TCP fallback, when TCP socket options are passed through 8320abdde82SPaolo Abeni * to the one remaining subflow. 8330abdde82SPaolo Abeni */ 8340abdde82SPaolo Abeni lock_sock(sk); 8350abdde82SPaolo Abeni ssk = __mptcp_tcp_fallback(msk); 8360abdde82SPaolo Abeni release_sock(sk); 8370abdde82SPaolo Abeni if (ssk) 8380abdde82SPaolo Abeni return tcp_setsockopt(ssk, level, optname, optval, optlen); 8390abdde82SPaolo Abeni 840ffcacff8SPoorva Sonparote if (level == SOL_IP) 841ffcacff8SPoorva Sonparote return mptcp_setsockopt_v4(msk, optname, optval, optlen); 842ffcacff8SPoorva Sonparote 8430abdde82SPaolo Abeni if (level == SOL_IPV6) 8440abdde82SPaolo Abeni return mptcp_setsockopt_v6(msk, optname, optval, optlen); 8450abdde82SPaolo Abeni 846aa1fbd94SFlorian Westphal if (level == SOL_TCP) 847aa1fbd94SFlorian Westphal return mptcp_setsockopt_sol_tcp(msk, optname, optval, optlen); 848aa1fbd94SFlorian Westphal 849aa1fbd94SFlorian Westphal return -EOPNOTSUPP; 850aa1fbd94SFlorian Westphal } 851aa1fbd94SFlorian Westphal 852aa1fbd94SFlorian Westphal static int mptcp_getsockopt_first_sf_only(struct mptcp_sock *msk, int level, int optname, 853aa1fbd94SFlorian Westphal char __user *optval, int __user *optlen) 854aa1fbd94SFlorian Westphal { 855aa1fbd94SFlorian Westphal struct sock *sk = (struct sock *)msk; 856aa1fbd94SFlorian Westphal struct socket *ssock; 857aa1fbd94SFlorian Westphal int ret = -EINVAL; 858aa1fbd94SFlorian Westphal struct sock *ssk; 859aa1fbd94SFlorian Westphal 860aa1fbd94SFlorian Westphal lock_sock(sk); 861aa1fbd94SFlorian Westphal ssk = msk->first; 862aa1fbd94SFlorian Westphal if (ssk) { 863aa1fbd94SFlorian Westphal ret = tcp_getsockopt(ssk, level, optname, optval, optlen); 864aa1fbd94SFlorian Westphal goto out; 865aa1fbd94SFlorian Westphal } 866aa1fbd94SFlorian Westphal 867aa1fbd94SFlorian Westphal ssock = __mptcp_nmpc_socket(msk); 868aa1fbd94SFlorian Westphal if (!ssock) 869aa1fbd94SFlorian Westphal goto out; 870aa1fbd94SFlorian Westphal 871aa1fbd94SFlorian Westphal ret = tcp_getsockopt(ssock->sk, level, optname, optval, optlen); 872aa1fbd94SFlorian Westphal 873aa1fbd94SFlorian Westphal out: 874aa1fbd94SFlorian Westphal release_sock(sk); 875aa1fbd94SFlorian Westphal return ret; 876aa1fbd94SFlorian Westphal } 877aa1fbd94SFlorian Westphal 87861bc6e82SFlorian Westphal void mptcp_diag_fill_info(struct mptcp_sock *msk, struct mptcp_info *info) 87961bc6e82SFlorian Westphal { 88061bc6e82SFlorian Westphal u32 flags = 0; 88161bc6e82SFlorian Westphal u8 val; 88261bc6e82SFlorian Westphal 88355c42fa7SFlorian Westphal memset(info, 0, sizeof(*info)); 88455c42fa7SFlorian Westphal 88561bc6e82SFlorian Westphal info->mptcpi_subflows = READ_ONCE(msk->pm.subflows); 88661bc6e82SFlorian Westphal info->mptcpi_add_addr_signal = READ_ONCE(msk->pm.add_addr_signaled); 88761bc6e82SFlorian Westphal info->mptcpi_add_addr_accepted = READ_ONCE(msk->pm.add_addr_accepted); 88861bc6e82SFlorian Westphal info->mptcpi_local_addr_used = READ_ONCE(msk->pm.local_addr_used); 88961bc6e82SFlorian Westphal info->mptcpi_subflows_max = mptcp_pm_get_subflows_max(msk); 89061bc6e82SFlorian Westphal val = mptcp_pm_get_add_addr_signal_max(msk); 89161bc6e82SFlorian Westphal info->mptcpi_add_addr_signal_max = val; 89261bc6e82SFlorian Westphal val = mptcp_pm_get_add_addr_accept_max(msk); 89361bc6e82SFlorian Westphal info->mptcpi_add_addr_accepted_max = val; 89461bc6e82SFlorian Westphal info->mptcpi_local_addr_max = mptcp_pm_get_local_addr_max(msk); 89561bc6e82SFlorian Westphal if (test_bit(MPTCP_FALLBACK_DONE, &msk->flags)) 89661bc6e82SFlorian Westphal flags |= MPTCP_INFO_FLAG_FALLBACK; 89761bc6e82SFlorian Westphal if (READ_ONCE(msk->can_ack)) 89861bc6e82SFlorian Westphal flags |= MPTCP_INFO_FLAG_REMOTE_KEY_RECEIVED; 89961bc6e82SFlorian Westphal info->mptcpi_flags = flags; 90061bc6e82SFlorian Westphal info->mptcpi_token = READ_ONCE(msk->token); 90161bc6e82SFlorian Westphal info->mptcpi_write_seq = READ_ONCE(msk->write_seq); 90261bc6e82SFlorian Westphal info->mptcpi_snd_una = READ_ONCE(msk->snd_una); 90361bc6e82SFlorian Westphal info->mptcpi_rcv_nxt = READ_ONCE(msk->ack_seq); 90461bc6e82SFlorian Westphal info->mptcpi_csum_enabled = READ_ONCE(msk->csum_enabled); 90561bc6e82SFlorian Westphal } 90661bc6e82SFlorian Westphal EXPORT_SYMBOL_GPL(mptcp_diag_fill_info); 90761bc6e82SFlorian Westphal 90855c42fa7SFlorian Westphal static int mptcp_getsockopt_info(struct mptcp_sock *msk, char __user *optval, int __user *optlen) 90955c42fa7SFlorian Westphal { 91055c42fa7SFlorian Westphal struct mptcp_info m_info; 91155c42fa7SFlorian Westphal int len; 91255c42fa7SFlorian Westphal 91355c42fa7SFlorian Westphal if (get_user(len, optlen)) 91455c42fa7SFlorian Westphal return -EFAULT; 91555c42fa7SFlorian Westphal 91655c42fa7SFlorian Westphal len = min_t(unsigned int, len, sizeof(struct mptcp_info)); 91755c42fa7SFlorian Westphal 91855c42fa7SFlorian Westphal mptcp_diag_fill_info(msk, &m_info); 91955c42fa7SFlorian Westphal 92055c42fa7SFlorian Westphal if (put_user(len, optlen)) 92155c42fa7SFlorian Westphal return -EFAULT; 92255c42fa7SFlorian Westphal 92355c42fa7SFlorian Westphal if (copy_to_user(optval, &m_info, len)) 92455c42fa7SFlorian Westphal return -EFAULT; 92555c42fa7SFlorian Westphal 92655c42fa7SFlorian Westphal return 0; 92755c42fa7SFlorian Westphal } 92855c42fa7SFlorian Westphal 92906f15ceeSFlorian Westphal static int mptcp_put_subflow_data(struct mptcp_subflow_data *sfd, 93006f15ceeSFlorian Westphal char __user *optval, 93106f15ceeSFlorian Westphal u32 copied, 93206f15ceeSFlorian Westphal int __user *optlen) 93306f15ceeSFlorian Westphal { 93406f15ceeSFlorian Westphal u32 copylen = min_t(u32, sfd->size_subflow_data, sizeof(*sfd)); 93506f15ceeSFlorian Westphal 93606f15ceeSFlorian Westphal if (copied) 93706f15ceeSFlorian Westphal copied += sfd->size_subflow_data; 93806f15ceeSFlorian Westphal else 93906f15ceeSFlorian Westphal copied = copylen; 94006f15ceeSFlorian Westphal 94106f15ceeSFlorian Westphal if (put_user(copied, optlen)) 94206f15ceeSFlorian Westphal return -EFAULT; 94306f15ceeSFlorian Westphal 94406f15ceeSFlorian Westphal if (copy_to_user(optval, sfd, copylen)) 94506f15ceeSFlorian Westphal return -EFAULT; 94606f15ceeSFlorian Westphal 94706f15ceeSFlorian Westphal return 0; 94806f15ceeSFlorian Westphal } 94906f15ceeSFlorian Westphal 95006f15ceeSFlorian Westphal static int mptcp_get_subflow_data(struct mptcp_subflow_data *sfd, 95106f15ceeSFlorian Westphal char __user *optval, int __user *optlen) 95206f15ceeSFlorian Westphal { 95306f15ceeSFlorian Westphal int len, copylen; 95406f15ceeSFlorian Westphal 95506f15ceeSFlorian Westphal if (get_user(len, optlen)) 95606f15ceeSFlorian Westphal return -EFAULT; 95706f15ceeSFlorian Westphal 95806f15ceeSFlorian Westphal /* if mptcp_subflow_data size is changed, need to adjust 95906f15ceeSFlorian Westphal * this function to deal with programs using old version. 96006f15ceeSFlorian Westphal */ 96106f15ceeSFlorian Westphal BUILD_BUG_ON(sizeof(*sfd) != MIN_INFO_OPTLEN_SIZE); 96206f15ceeSFlorian Westphal 96306f15ceeSFlorian Westphal if (len < MIN_INFO_OPTLEN_SIZE) 96406f15ceeSFlorian Westphal return -EINVAL; 96506f15ceeSFlorian Westphal 96606f15ceeSFlorian Westphal memset(sfd, 0, sizeof(*sfd)); 96706f15ceeSFlorian Westphal 96806f15ceeSFlorian Westphal copylen = min_t(unsigned int, len, sizeof(*sfd)); 96906f15ceeSFlorian Westphal if (copy_from_user(sfd, optval, copylen)) 97006f15ceeSFlorian Westphal return -EFAULT; 97106f15ceeSFlorian Westphal 97206f15ceeSFlorian Westphal /* size_subflow_data is u32, but len is signed */ 97306f15ceeSFlorian Westphal if (sfd->size_subflow_data > INT_MAX || 97406f15ceeSFlorian Westphal sfd->size_user > INT_MAX) 97506f15ceeSFlorian Westphal return -EINVAL; 97606f15ceeSFlorian Westphal 97706f15ceeSFlorian Westphal if (sfd->size_subflow_data < MIN_INFO_OPTLEN_SIZE || 97806f15ceeSFlorian Westphal sfd->size_subflow_data > len) 97906f15ceeSFlorian Westphal return -EINVAL; 98006f15ceeSFlorian Westphal 98106f15ceeSFlorian Westphal if (sfd->num_subflows || sfd->size_kernel) 98206f15ceeSFlorian Westphal return -EINVAL; 98306f15ceeSFlorian Westphal 98406f15ceeSFlorian Westphal return len - sfd->size_subflow_data; 98506f15ceeSFlorian Westphal } 98606f15ceeSFlorian Westphal 98706f15ceeSFlorian Westphal static int mptcp_getsockopt_tcpinfo(struct mptcp_sock *msk, char __user *optval, 98806f15ceeSFlorian Westphal int __user *optlen) 98906f15ceeSFlorian Westphal { 99006f15ceeSFlorian Westphal struct mptcp_subflow_context *subflow; 99180638684SGeliang Tang struct sock *sk = (struct sock *)msk; 99206f15ceeSFlorian Westphal unsigned int sfcount = 0, copied = 0; 99306f15ceeSFlorian Westphal struct mptcp_subflow_data sfd; 99406f15ceeSFlorian Westphal char __user *infoptr; 99506f15ceeSFlorian Westphal int len; 99606f15ceeSFlorian Westphal 99706f15ceeSFlorian Westphal len = mptcp_get_subflow_data(&sfd, optval, optlen); 99806f15ceeSFlorian Westphal if (len < 0) 99906f15ceeSFlorian Westphal return len; 100006f15ceeSFlorian Westphal 100106f15ceeSFlorian Westphal sfd.size_kernel = sizeof(struct tcp_info); 100206f15ceeSFlorian Westphal sfd.size_user = min_t(unsigned int, sfd.size_user, 100306f15ceeSFlorian Westphal sizeof(struct tcp_info)); 100406f15ceeSFlorian Westphal 100506f15ceeSFlorian Westphal infoptr = optval + sfd.size_subflow_data; 100606f15ceeSFlorian Westphal 100706f15ceeSFlorian Westphal lock_sock(sk); 100806f15ceeSFlorian Westphal 100906f15ceeSFlorian Westphal mptcp_for_each_subflow(msk, subflow) { 101006f15ceeSFlorian Westphal struct sock *ssk = mptcp_subflow_tcp_sock(subflow); 101106f15ceeSFlorian Westphal 101206f15ceeSFlorian Westphal ++sfcount; 101306f15ceeSFlorian Westphal 101406f15ceeSFlorian Westphal if (len && len >= sfd.size_user) { 101506f15ceeSFlorian Westphal struct tcp_info info; 101606f15ceeSFlorian Westphal 101706f15ceeSFlorian Westphal tcp_get_info(ssk, &info); 101806f15ceeSFlorian Westphal 101906f15ceeSFlorian Westphal if (copy_to_user(infoptr, &info, sfd.size_user)) { 102006f15ceeSFlorian Westphal release_sock(sk); 102106f15ceeSFlorian Westphal return -EFAULT; 102206f15ceeSFlorian Westphal } 102306f15ceeSFlorian Westphal 102406f15ceeSFlorian Westphal infoptr += sfd.size_user; 102506f15ceeSFlorian Westphal copied += sfd.size_user; 102606f15ceeSFlorian Westphal len -= sfd.size_user; 102706f15ceeSFlorian Westphal } 102806f15ceeSFlorian Westphal } 102906f15ceeSFlorian Westphal 103006f15ceeSFlorian Westphal release_sock(sk); 103106f15ceeSFlorian Westphal 103206f15ceeSFlorian Westphal sfd.num_subflows = sfcount; 103306f15ceeSFlorian Westphal 103406f15ceeSFlorian Westphal if (mptcp_put_subflow_data(&sfd, optval, copied, optlen)) 103506f15ceeSFlorian Westphal return -EFAULT; 103606f15ceeSFlorian Westphal 103706f15ceeSFlorian Westphal return 0; 103806f15ceeSFlorian Westphal } 103906f15ceeSFlorian Westphal 1040c11c5906SFlorian Westphal static void mptcp_get_sub_addrs(const struct sock *sk, struct mptcp_subflow_addrs *a) 1041c11c5906SFlorian Westphal { 1042c11c5906SFlorian Westphal struct inet_sock *inet = inet_sk(sk); 1043c11c5906SFlorian Westphal 1044c11c5906SFlorian Westphal memset(a, 0, sizeof(*a)); 1045c11c5906SFlorian Westphal 1046c11c5906SFlorian Westphal if (sk->sk_family == AF_INET) { 1047c11c5906SFlorian Westphal a->sin_local.sin_family = AF_INET; 1048c11c5906SFlorian Westphal a->sin_local.sin_port = inet->inet_sport; 1049c11c5906SFlorian Westphal a->sin_local.sin_addr.s_addr = inet->inet_rcv_saddr; 1050c11c5906SFlorian Westphal 1051c11c5906SFlorian Westphal if (!a->sin_local.sin_addr.s_addr) 1052c11c5906SFlorian Westphal a->sin_local.sin_addr.s_addr = inet->inet_saddr; 1053c11c5906SFlorian Westphal 1054c11c5906SFlorian Westphal a->sin_remote.sin_family = AF_INET; 1055c11c5906SFlorian Westphal a->sin_remote.sin_port = inet->inet_dport; 1056c11c5906SFlorian Westphal a->sin_remote.sin_addr.s_addr = inet->inet_daddr; 1057c11c5906SFlorian Westphal #if IS_ENABLED(CONFIG_IPV6) 1058c11c5906SFlorian Westphal } else if (sk->sk_family == AF_INET6) { 1059c11c5906SFlorian Westphal const struct ipv6_pinfo *np = inet6_sk(sk); 1060c11c5906SFlorian Westphal 106129211e7dSTim Gardner if (WARN_ON_ONCE(!np)) 106229211e7dSTim Gardner return; 106329211e7dSTim Gardner 1064c11c5906SFlorian Westphal a->sin6_local.sin6_family = AF_INET6; 1065c11c5906SFlorian Westphal a->sin6_local.sin6_port = inet->inet_sport; 1066c11c5906SFlorian Westphal 1067c11c5906SFlorian Westphal if (ipv6_addr_any(&sk->sk_v6_rcv_saddr)) 1068c11c5906SFlorian Westphal a->sin6_local.sin6_addr = np->saddr; 1069c11c5906SFlorian Westphal else 1070c11c5906SFlorian Westphal a->sin6_local.sin6_addr = sk->sk_v6_rcv_saddr; 1071c11c5906SFlorian Westphal 1072c11c5906SFlorian Westphal a->sin6_remote.sin6_family = AF_INET6; 1073c11c5906SFlorian Westphal a->sin6_remote.sin6_port = inet->inet_dport; 1074c11c5906SFlorian Westphal a->sin6_remote.sin6_addr = sk->sk_v6_daddr; 1075c11c5906SFlorian Westphal #endif 1076c11c5906SFlorian Westphal } 1077c11c5906SFlorian Westphal } 1078c11c5906SFlorian Westphal 1079c11c5906SFlorian Westphal static int mptcp_getsockopt_subflow_addrs(struct mptcp_sock *msk, char __user *optval, 1080c11c5906SFlorian Westphal int __user *optlen) 1081c11c5906SFlorian Westphal { 1082c11c5906SFlorian Westphal struct mptcp_subflow_context *subflow; 108380638684SGeliang Tang struct sock *sk = (struct sock *)msk; 1084c11c5906SFlorian Westphal unsigned int sfcount = 0, copied = 0; 1085c11c5906SFlorian Westphal struct mptcp_subflow_data sfd; 1086c11c5906SFlorian Westphal char __user *addrptr; 1087c11c5906SFlorian Westphal int len; 1088c11c5906SFlorian Westphal 1089c11c5906SFlorian Westphal len = mptcp_get_subflow_data(&sfd, optval, optlen); 1090c11c5906SFlorian Westphal if (len < 0) 1091c11c5906SFlorian Westphal return len; 1092c11c5906SFlorian Westphal 1093c11c5906SFlorian Westphal sfd.size_kernel = sizeof(struct mptcp_subflow_addrs); 1094c11c5906SFlorian Westphal sfd.size_user = min_t(unsigned int, sfd.size_user, 1095c11c5906SFlorian Westphal sizeof(struct mptcp_subflow_addrs)); 1096c11c5906SFlorian Westphal 1097c11c5906SFlorian Westphal addrptr = optval + sfd.size_subflow_data; 1098c11c5906SFlorian Westphal 1099c11c5906SFlorian Westphal lock_sock(sk); 1100c11c5906SFlorian Westphal 1101c11c5906SFlorian Westphal mptcp_for_each_subflow(msk, subflow) { 1102c11c5906SFlorian Westphal struct sock *ssk = mptcp_subflow_tcp_sock(subflow); 1103c11c5906SFlorian Westphal 1104c11c5906SFlorian Westphal ++sfcount; 1105c11c5906SFlorian Westphal 1106c11c5906SFlorian Westphal if (len && len >= sfd.size_user) { 1107c11c5906SFlorian Westphal struct mptcp_subflow_addrs a; 1108c11c5906SFlorian Westphal 1109c11c5906SFlorian Westphal mptcp_get_sub_addrs(ssk, &a); 1110c11c5906SFlorian Westphal 1111c11c5906SFlorian Westphal if (copy_to_user(addrptr, &a, sfd.size_user)) { 1112c11c5906SFlorian Westphal release_sock(sk); 1113c11c5906SFlorian Westphal return -EFAULT; 1114c11c5906SFlorian Westphal } 1115c11c5906SFlorian Westphal 1116c11c5906SFlorian Westphal addrptr += sfd.size_user; 1117c11c5906SFlorian Westphal copied += sfd.size_user; 1118c11c5906SFlorian Westphal len -= sfd.size_user; 1119c11c5906SFlorian Westphal } 1120c11c5906SFlorian Westphal } 1121c11c5906SFlorian Westphal 1122c11c5906SFlorian Westphal release_sock(sk); 1123c11c5906SFlorian Westphal 1124c11c5906SFlorian Westphal sfd.num_subflows = sfcount; 1125c11c5906SFlorian Westphal 1126c11c5906SFlorian Westphal if (mptcp_put_subflow_data(&sfd, optval, copied, optlen)) 1127c11c5906SFlorian Westphal return -EFAULT; 1128c11c5906SFlorian Westphal 1129c11c5906SFlorian Westphal return 0; 1130c11c5906SFlorian Westphal } 1131c11c5906SFlorian Westphal 11322c9e7765SFlorian Westphal static int mptcp_put_int_option(struct mptcp_sock *msk, char __user *optval, 11332c9e7765SFlorian Westphal int __user *optlen, int val) 11342c9e7765SFlorian Westphal { 11352c9e7765SFlorian Westphal int len; 11362c9e7765SFlorian Westphal 11372c9e7765SFlorian Westphal if (get_user(len, optlen)) 11382c9e7765SFlorian Westphal return -EFAULT; 11392c9e7765SFlorian Westphal if (len < 0) 11402c9e7765SFlorian Westphal return -EINVAL; 11412c9e7765SFlorian Westphal 11423b1e21ebSFlorian Westphal if (len < sizeof(int) && len > 0 && val >= 0 && val <= 255) { 11433b1e21ebSFlorian Westphal unsigned char ucval = (unsigned char)val; 11443b1e21ebSFlorian Westphal 11453b1e21ebSFlorian Westphal len = 1; 11463b1e21ebSFlorian Westphal if (put_user(len, optlen)) 11473b1e21ebSFlorian Westphal return -EFAULT; 11483b1e21ebSFlorian Westphal if (copy_to_user(optval, &ucval, 1)) 11493b1e21ebSFlorian Westphal return -EFAULT; 11503b1e21ebSFlorian Westphal } else { 11513b1e21ebSFlorian Westphal len = min_t(unsigned int, len, sizeof(int)); 11522c9e7765SFlorian Westphal if (put_user(len, optlen)) 11532c9e7765SFlorian Westphal return -EFAULT; 11542c9e7765SFlorian Westphal if (copy_to_user(optval, &val, len)) 11552c9e7765SFlorian Westphal return -EFAULT; 11563b1e21ebSFlorian Westphal } 11572c9e7765SFlorian Westphal 11582c9e7765SFlorian Westphal return 0; 11592c9e7765SFlorian Westphal } 11602c9e7765SFlorian Westphal 1161aa1fbd94SFlorian Westphal static int mptcp_getsockopt_sol_tcp(struct mptcp_sock *msk, int optname, 1162aa1fbd94SFlorian Westphal char __user *optval, int __user *optlen) 1163aa1fbd94SFlorian Westphal { 1164aa1fbd94SFlorian Westphal switch (optname) { 1165aa1fbd94SFlorian Westphal case TCP_ULP: 1166aa1fbd94SFlorian Westphal case TCP_CONGESTION: 1167aa1fbd94SFlorian Westphal case TCP_INFO: 1168aa1fbd94SFlorian Westphal case TCP_CC_INFO: 1169ea1e301dSFlorian Westphal case TCP_DEFER_ACCEPT: 11704ffb0a02SDmytro Shytyi case TCP_FASTOPEN: 117154635bd0SBenjamin Hesmans case TCP_FASTOPEN_CONNECT: 1172*cb99816cSMatthieu Baerts case TCP_FASTOPEN_KEY: 1173e64d4debSMatthieu Baerts case TCP_FASTOPEN_NO_COOKIE: 1174aa1fbd94SFlorian Westphal return mptcp_getsockopt_first_sf_only(msk, SOL_TCP, optname, 1175aa1fbd94SFlorian Westphal optval, optlen); 11762c9e7765SFlorian Westphal case TCP_INQ: 11772c9e7765SFlorian Westphal return mptcp_put_int_option(msk, optval, optlen, msk->recvmsg_inq); 11784f6e14bdSMaxim Galaganov case TCP_CORK: 11794f6e14bdSMaxim Galaganov return mptcp_put_int_option(msk, optval, optlen, msk->cork); 11804f6e14bdSMaxim Galaganov case TCP_NODELAY: 11814f6e14bdSMaxim Galaganov return mptcp_put_int_option(msk, optval, optlen, msk->nodelay); 1182aa1fbd94SFlorian Westphal } 11830abdde82SPaolo Abeni return -EOPNOTSUPP; 11840abdde82SPaolo Abeni } 11850abdde82SPaolo Abeni 11863b1e21ebSFlorian Westphal static int mptcp_getsockopt_v4(struct mptcp_sock *msk, int optname, 11873b1e21ebSFlorian Westphal char __user *optval, int __user *optlen) 11883b1e21ebSFlorian Westphal { 11893b1e21ebSFlorian Westphal struct sock *sk = (void *)msk; 11903b1e21ebSFlorian Westphal 11913b1e21ebSFlorian Westphal switch (optname) { 11923b1e21ebSFlorian Westphal case IP_TOS: 11933b1e21ebSFlorian Westphal return mptcp_put_int_option(msk, optval, optlen, inet_sk(sk)->tos); 11943b1e21ebSFlorian Westphal } 11953b1e21ebSFlorian Westphal 11963b1e21ebSFlorian Westphal return -EOPNOTSUPP; 11973b1e21ebSFlorian Westphal } 11983b1e21ebSFlorian Westphal 119955c42fa7SFlorian Westphal static int mptcp_getsockopt_sol_mptcp(struct mptcp_sock *msk, int optname, 120055c42fa7SFlorian Westphal char __user *optval, int __user *optlen) 120155c42fa7SFlorian Westphal { 120255c42fa7SFlorian Westphal switch (optname) { 120355c42fa7SFlorian Westphal case MPTCP_INFO: 120455c42fa7SFlorian Westphal return mptcp_getsockopt_info(msk, optval, optlen); 120506f15ceeSFlorian Westphal case MPTCP_TCPINFO: 120606f15ceeSFlorian Westphal return mptcp_getsockopt_tcpinfo(msk, optval, optlen); 1207c11c5906SFlorian Westphal case MPTCP_SUBFLOW_ADDRS: 1208c11c5906SFlorian Westphal return mptcp_getsockopt_subflow_addrs(msk, optval, optlen); 120955c42fa7SFlorian Westphal } 121055c42fa7SFlorian Westphal 121155c42fa7SFlorian Westphal return -EOPNOTSUPP; 121255c42fa7SFlorian Westphal } 121355c42fa7SFlorian Westphal 12140abdde82SPaolo Abeni int mptcp_getsockopt(struct sock *sk, int level, int optname, 12150abdde82SPaolo Abeni char __user *optval, int __user *option) 12160abdde82SPaolo Abeni { 12170abdde82SPaolo Abeni struct mptcp_sock *msk = mptcp_sk(sk); 12180abdde82SPaolo Abeni struct sock *ssk; 12190abdde82SPaolo Abeni 12200abdde82SPaolo Abeni pr_debug("msk=%p", msk); 12210abdde82SPaolo Abeni 12220abdde82SPaolo Abeni /* @@ the meaning of setsockopt() when the socket is connected and 12230abdde82SPaolo Abeni * there are multiple subflows is not yet defined. It is up to the 12240abdde82SPaolo Abeni * MPTCP-level socket to configure the subflows until the subflow 12250abdde82SPaolo Abeni * is in TCP fallback, when socket options are passed through 12260abdde82SPaolo Abeni * to the one remaining subflow. 12270abdde82SPaolo Abeni */ 12280abdde82SPaolo Abeni lock_sock(sk); 12290abdde82SPaolo Abeni ssk = __mptcp_tcp_fallback(msk); 12300abdde82SPaolo Abeni release_sock(sk); 12310abdde82SPaolo Abeni if (ssk) 12320abdde82SPaolo Abeni return tcp_getsockopt(ssk, level, optname, optval, option); 12330abdde82SPaolo Abeni 12343b1e21ebSFlorian Westphal if (level == SOL_IP) 12353b1e21ebSFlorian Westphal return mptcp_getsockopt_v4(msk, optname, optval, option); 1236aa1fbd94SFlorian Westphal if (level == SOL_TCP) 1237aa1fbd94SFlorian Westphal return mptcp_getsockopt_sol_tcp(msk, optname, optval, option); 123855c42fa7SFlorian Westphal if (level == SOL_MPTCP) 123955c42fa7SFlorian Westphal return mptcp_getsockopt_sol_mptcp(msk, optname, optval, option); 12400abdde82SPaolo Abeni return -EOPNOTSUPP; 12410abdde82SPaolo Abeni } 12420abdde82SPaolo Abeni 12431b3e7edeSFlorian Westphal static void sync_socket_options(struct mptcp_sock *msk, struct sock *ssk) 12441b3e7edeSFlorian Westphal { 12455d0a6bc8SFlorian Westphal static const unsigned int tx_rx_locks = SOCK_RCVBUF_LOCK | SOCK_SNDBUF_LOCK; 12461b3e7edeSFlorian Westphal struct sock *sk = (struct sock *)msk; 12471b3e7edeSFlorian Westphal 12481b3e7edeSFlorian Westphal if (ssk->sk_prot->keepalive) { 12491b3e7edeSFlorian Westphal if (sock_flag(sk, SOCK_KEEPOPEN)) 12501b3e7edeSFlorian Westphal ssk->sk_prot->keepalive(ssk, 1); 12511b3e7edeSFlorian Westphal else 12521b3e7edeSFlorian Westphal ssk->sk_prot->keepalive(ssk, 0); 12531b3e7edeSFlorian Westphal } 12541b3e7edeSFlorian Westphal 12551b3e7edeSFlorian Westphal ssk->sk_priority = sk->sk_priority; 12565d0a6bc8SFlorian Westphal ssk->sk_bound_dev_if = sk->sk_bound_dev_if; 12575d0a6bc8SFlorian Westphal ssk->sk_incoming_cpu = sk->sk_incoming_cpu; 1258ffcacff8SPoorva Sonparote __ip_sock_set_tos(ssk, inet_sk(sk)->tos); 12595d0a6bc8SFlorian Westphal 12605d0a6bc8SFlorian Westphal if (sk->sk_userlocks & tx_rx_locks) { 12615d0a6bc8SFlorian Westphal ssk->sk_userlocks |= sk->sk_userlocks & tx_rx_locks; 12625d0a6bc8SFlorian Westphal if (sk->sk_userlocks & SOCK_SNDBUF_LOCK) 12635d0a6bc8SFlorian Westphal WRITE_ONCE(ssk->sk_sndbuf, sk->sk_sndbuf); 12645d0a6bc8SFlorian Westphal if (sk->sk_userlocks & SOCK_RCVBUF_LOCK) 12655d0a6bc8SFlorian Westphal WRITE_ONCE(ssk->sk_rcvbuf, sk->sk_rcvbuf); 12665d0a6bc8SFlorian Westphal } 12675d0a6bc8SFlorian Westphal 12685d0a6bc8SFlorian Westphal if (sock_flag(sk, SOCK_LINGER)) { 12695d0a6bc8SFlorian Westphal ssk->sk_lingertime = sk->sk_lingertime; 12705d0a6bc8SFlorian Westphal sock_set_flag(ssk, SOCK_LINGER); 12715d0a6bc8SFlorian Westphal } else { 12725d0a6bc8SFlorian Westphal sock_reset_flag(ssk, SOCK_LINGER); 12735d0a6bc8SFlorian Westphal } 12745d0a6bc8SFlorian Westphal 12755d0a6bc8SFlorian Westphal if (sk->sk_mark != ssk->sk_mark) { 12765d0a6bc8SFlorian Westphal ssk->sk_mark = sk->sk_mark; 12775d0a6bc8SFlorian Westphal sk_dst_reset(ssk); 12785d0a6bc8SFlorian Westphal } 12795d0a6bc8SFlorian Westphal 12805d0a6bc8SFlorian Westphal sock_valbool_flag(ssk, SOCK_DBG, sock_flag(sk, SOCK_DBG)); 12815d0a6bc8SFlorian Westphal 12825d0a6bc8SFlorian Westphal if (inet_csk(sk)->icsk_ca_ops != inet_csk(ssk)->icsk_ca_ops) 128320b5759fSPaolo Abeni tcp_set_congestion_control(ssk, msk->ca_name, false, true); 12844f6e14bdSMaxim Galaganov __tcp_sock_set_cork(ssk, !!msk->cork); 12854f6e14bdSMaxim Galaganov __tcp_sock_set_nodelay(ssk, !!msk->nodelay); 1286c9406a23SFlorian Westphal 1287c9406a23SFlorian Westphal inet_sk(ssk)->transparent = inet_sk(sk)->transparent; 1288c9406a23SFlorian Westphal inet_sk(ssk)->freebind = inet_sk(sk)->freebind; 12891b3e7edeSFlorian Westphal } 12901b3e7edeSFlorian Westphal 1291df00b087SFlorian Westphal static void __mptcp_sockopt_sync(struct mptcp_sock *msk, struct sock *ssk) 1292df00b087SFlorian Westphal { 12931b3e7edeSFlorian Westphal bool slow = lock_sock_fast(ssk); 12941b3e7edeSFlorian Westphal 12951b3e7edeSFlorian Westphal sync_socket_options(msk, ssk); 12961b3e7edeSFlorian Westphal 12971b3e7edeSFlorian Westphal unlock_sock_fast(ssk, slow); 1298df00b087SFlorian Westphal } 1299df00b087SFlorian Westphal 130078962489SFlorian Westphal void mptcp_sockopt_sync(struct mptcp_sock *msk, struct sock *ssk) 130178962489SFlorian Westphal { 1302df00b087SFlorian Westphal struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(ssk); 1303df00b087SFlorian Westphal 130478962489SFlorian Westphal msk_owned_by_me(msk); 1305df00b087SFlorian Westphal 1306df00b087SFlorian Westphal if (READ_ONCE(subflow->setsockopt_seq) != msk->setsockopt_seq) { 1307df00b087SFlorian Westphal __mptcp_sockopt_sync(msk, ssk); 1308df00b087SFlorian Westphal 1309df00b087SFlorian Westphal subflow->setsockopt_seq = msk->setsockopt_seq; 1310df00b087SFlorian Westphal } 131178962489SFlorian Westphal } 131278962489SFlorian Westphal 13133e501490SPaolo Abeni void mptcp_sockopt_sync_locked(struct mptcp_sock *msk, struct sock *ssk) 131478962489SFlorian Westphal { 13153e501490SPaolo Abeni struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(ssk); 131678962489SFlorian Westphal 13173e501490SPaolo Abeni msk_owned_by_me(msk); 131878962489SFlorian Westphal 13193e501490SPaolo Abeni if (READ_ONCE(subflow->setsockopt_seq) != msk->setsockopt_seq) { 13203e501490SPaolo Abeni sync_socket_options(msk, ssk); 132178962489SFlorian Westphal 13223e501490SPaolo Abeni subflow->setsockopt_seq = msk->setsockopt_seq; 1323df00b087SFlorian Westphal } 132478962489SFlorian Westphal } 1325