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 1849243207SPaolo Abeni #define MIN_FULL_INFO_OPTLEN_SIZE 40 1906f15ceeSFlorian Westphal 200abdde82SPaolo Abeni static struct sock *__mptcp_tcp_fallback(struct mptcp_sock *msk) 210abdde82SPaolo Abeni { 22109cdeb8SGeliang Tang msk_owned_by_me(msk); 230abdde82SPaolo Abeni 240abdde82SPaolo Abeni if (likely(!__mptcp_check_fallback(msk))) 250abdde82SPaolo Abeni return NULL; 260abdde82SPaolo Abeni 270abdde82SPaolo Abeni return msk->first; 280abdde82SPaolo Abeni } 290abdde82SPaolo Abeni 30df00b087SFlorian Westphal static u32 sockopt_seq_reset(const struct sock *sk) 31df00b087SFlorian Westphal { 32df00b087SFlorian Westphal sock_owned_by_me(sk); 33df00b087SFlorian Westphal 34df00b087SFlorian Westphal /* Highbits contain state. Allows to distinguish sockopt_seq 35df00b087SFlorian Westphal * of listener and established: 36df00b087SFlorian Westphal * s0 = new_listener() 37df00b087SFlorian Westphal * sockopt(s0) - seq is 1 38df00b087SFlorian Westphal * s1 = accept(s0) - s1 inherits seq 1 if listener sk (s0) 39df00b087SFlorian Westphal * sockopt(s0) - seq increments to 2 on s0 40df00b087SFlorian Westphal * sockopt(s1) // seq increments to 2 on s1 (different option) 41df00b087SFlorian Westphal * new ssk completes join, inherits options from s0 // seq 2 42df00b087SFlorian Westphal * Needs sync from mptcp join logic, but ssk->seq == msk->seq 43df00b087SFlorian Westphal * 44df00b087SFlorian Westphal * Set High order bits to sk_state so ssk->seq == msk->seq test 45df00b087SFlorian Westphal * will fail. 46df00b087SFlorian Westphal */ 47df00b087SFlorian Westphal 48df00b087SFlorian Westphal return (u32)sk->sk_state << 24u; 49df00b087SFlorian Westphal } 50df00b087SFlorian Westphal 511b3e7edeSFlorian Westphal static void sockopt_seq_inc(struct mptcp_sock *msk) 521b3e7edeSFlorian Westphal { 531b3e7edeSFlorian Westphal u32 seq = (msk->setsockopt_seq + 1) & 0x00ffffff; 541b3e7edeSFlorian Westphal 551b3e7edeSFlorian Westphal msk->setsockopt_seq = sockopt_seq_reset((struct sock *)msk) + seq; 561b3e7edeSFlorian Westphal } 571b3e7edeSFlorian Westphal 581b3e7edeSFlorian Westphal static int mptcp_get_int_option(struct mptcp_sock *msk, sockptr_t optval, 591b3e7edeSFlorian Westphal unsigned int optlen, int *val) 601b3e7edeSFlorian Westphal { 611b3e7edeSFlorian Westphal if (optlen < sizeof(int)) 621b3e7edeSFlorian Westphal return -EINVAL; 631b3e7edeSFlorian Westphal 641b3e7edeSFlorian Westphal if (copy_from_sockptr(val, optval, sizeof(*val))) 651b3e7edeSFlorian Westphal return -EFAULT; 661b3e7edeSFlorian Westphal 671b3e7edeSFlorian Westphal return 0; 681b3e7edeSFlorian Westphal } 691b3e7edeSFlorian Westphal 701b3e7edeSFlorian Westphal static void mptcp_sol_socket_sync_intval(struct mptcp_sock *msk, int optname, int val) 711b3e7edeSFlorian Westphal { 721b3e7edeSFlorian Westphal struct mptcp_subflow_context *subflow; 731b3e7edeSFlorian Westphal struct sock *sk = (struct sock *)msk; 741b3e7edeSFlorian Westphal 751b3e7edeSFlorian Westphal lock_sock(sk); 761b3e7edeSFlorian Westphal sockopt_seq_inc(msk); 771b3e7edeSFlorian Westphal 781b3e7edeSFlorian Westphal mptcp_for_each_subflow(msk, subflow) { 791b3e7edeSFlorian Westphal struct sock *ssk = mptcp_subflow_tcp_sock(subflow); 801b3e7edeSFlorian Westphal bool slow = lock_sock_fast(ssk); 811b3e7edeSFlorian Westphal 821b3e7edeSFlorian Westphal switch (optname) { 83a03c99b2SFlorian Westphal case SO_DEBUG: 84a03c99b2SFlorian Westphal sock_valbool_flag(ssk, SOCK_DBG, !!val); 85a03c99b2SFlorian Westphal break; 861b3e7edeSFlorian Westphal case SO_KEEPALIVE: 871b3e7edeSFlorian Westphal if (ssk->sk_prot->keepalive) 881b3e7edeSFlorian Westphal ssk->sk_prot->keepalive(ssk, !!val); 891b3e7edeSFlorian Westphal sock_valbool_flag(ssk, SOCK_KEEPOPEN, !!val); 901b3e7edeSFlorian Westphal break; 911b3e7edeSFlorian Westphal case SO_PRIORITY: 921b3e7edeSFlorian Westphal ssk->sk_priority = val; 931b3e7edeSFlorian Westphal break; 945d0a6bc8SFlorian Westphal case SO_SNDBUF: 955d0a6bc8SFlorian Westphal case SO_SNDBUFFORCE: 965d0a6bc8SFlorian Westphal ssk->sk_userlocks |= SOCK_SNDBUF_LOCK; 975d0a6bc8SFlorian Westphal WRITE_ONCE(ssk->sk_sndbuf, sk->sk_sndbuf); 985d0a6bc8SFlorian Westphal break; 995d0a6bc8SFlorian Westphal case SO_RCVBUF: 1005d0a6bc8SFlorian Westphal case SO_RCVBUFFORCE: 1015d0a6bc8SFlorian Westphal ssk->sk_userlocks |= SOCK_RCVBUF_LOCK; 1025d0a6bc8SFlorian Westphal WRITE_ONCE(ssk->sk_rcvbuf, sk->sk_rcvbuf); 1035d0a6bc8SFlorian Westphal break; 10436704413SFlorian Westphal case SO_MARK: 10536704413SFlorian Westphal if (READ_ONCE(ssk->sk_mark) != sk->sk_mark) { 1063c5b4d69SEric Dumazet WRITE_ONCE(ssk->sk_mark, sk->sk_mark); 10736704413SFlorian Westphal sk_dst_reset(ssk); 10836704413SFlorian Westphal } 10936704413SFlorian Westphal break; 1106f0d7198SFlorian Westphal case SO_INCOMING_CPU: 1116f0d7198SFlorian Westphal WRITE_ONCE(ssk->sk_incoming_cpu, val); 1126f0d7198SFlorian Westphal break; 1131b3e7edeSFlorian Westphal } 1141b3e7edeSFlorian Westphal 1151b3e7edeSFlorian Westphal subflow->setsockopt_seq = msk->setsockopt_seq; 1161b3e7edeSFlorian Westphal unlock_sock_fast(ssk, slow); 1171b3e7edeSFlorian Westphal } 1181b3e7edeSFlorian Westphal 1191b3e7edeSFlorian Westphal release_sock(sk); 1201b3e7edeSFlorian Westphal } 1211b3e7edeSFlorian Westphal 1221b3e7edeSFlorian Westphal static int mptcp_sol_socket_intval(struct mptcp_sock *msk, int optname, int val) 1231b3e7edeSFlorian Westphal { 1241b3e7edeSFlorian Westphal sockptr_t optval = KERNEL_SOCKPTR(&val); 1251b3e7edeSFlorian Westphal struct sock *sk = (struct sock *)msk; 1261b3e7edeSFlorian Westphal int ret; 1271b3e7edeSFlorian Westphal 1281b3e7edeSFlorian Westphal ret = sock_setsockopt(sk->sk_socket, SOL_SOCKET, optname, 1291b3e7edeSFlorian Westphal optval, sizeof(val)); 1301b3e7edeSFlorian Westphal if (ret) 1311b3e7edeSFlorian Westphal return ret; 1321b3e7edeSFlorian Westphal 1331b3e7edeSFlorian Westphal mptcp_sol_socket_sync_intval(msk, optname, val); 1341b3e7edeSFlorian Westphal return 0; 1351b3e7edeSFlorian Westphal } 1361b3e7edeSFlorian Westphal 1376f0d7198SFlorian Westphal static void mptcp_so_incoming_cpu(struct mptcp_sock *msk, int val) 1386f0d7198SFlorian Westphal { 1396f0d7198SFlorian Westphal struct sock *sk = (struct sock *)msk; 1406f0d7198SFlorian Westphal 1416f0d7198SFlorian Westphal WRITE_ONCE(sk->sk_incoming_cpu, val); 1426f0d7198SFlorian Westphal 1436f0d7198SFlorian Westphal mptcp_sol_socket_sync_intval(msk, SO_INCOMING_CPU, val); 1446f0d7198SFlorian Westphal } 1456f0d7198SFlorian Westphal 1469061f24bSFlorian Westphal static int mptcp_setsockopt_sol_socket_tstamp(struct mptcp_sock *msk, int optname, int val) 1479061f24bSFlorian Westphal { 1489061f24bSFlorian Westphal sockptr_t optval = KERNEL_SOCKPTR(&val); 1499061f24bSFlorian Westphal struct mptcp_subflow_context *subflow; 1509061f24bSFlorian Westphal struct sock *sk = (struct sock *)msk; 1519061f24bSFlorian Westphal int ret; 1529061f24bSFlorian Westphal 1539061f24bSFlorian Westphal ret = sock_setsockopt(sk->sk_socket, SOL_SOCKET, optname, 1549061f24bSFlorian Westphal optval, sizeof(val)); 1559061f24bSFlorian Westphal if (ret) 1569061f24bSFlorian Westphal return ret; 1579061f24bSFlorian Westphal 1589061f24bSFlorian Westphal lock_sock(sk); 1599061f24bSFlorian Westphal mptcp_for_each_subflow(msk, subflow) { 1609061f24bSFlorian Westphal struct sock *ssk = mptcp_subflow_tcp_sock(subflow); 1619061f24bSFlorian Westphal bool slow = lock_sock_fast(ssk); 1629061f24bSFlorian Westphal 1639061f24bSFlorian Westphal sock_set_timestamp(sk, optname, !!val); 1649061f24bSFlorian Westphal unlock_sock_fast(ssk, slow); 1659061f24bSFlorian Westphal } 1669061f24bSFlorian Westphal 1679061f24bSFlorian Westphal release_sock(sk); 1689061f24bSFlorian Westphal return 0; 1699061f24bSFlorian Westphal } 1709061f24bSFlorian Westphal 1711b3e7edeSFlorian Westphal static int mptcp_setsockopt_sol_socket_int(struct mptcp_sock *msk, int optname, 1726c9a0a0fSYangbo Lu sockptr_t optval, 1736c9a0a0fSYangbo Lu unsigned int optlen) 1741b3e7edeSFlorian Westphal { 1751b3e7edeSFlorian Westphal int val, ret; 1761b3e7edeSFlorian Westphal 1771b3e7edeSFlorian Westphal ret = mptcp_get_int_option(msk, optval, optlen, &val); 1781b3e7edeSFlorian Westphal if (ret) 1791b3e7edeSFlorian Westphal return ret; 1801b3e7edeSFlorian Westphal 1811b3e7edeSFlorian Westphal switch (optname) { 1821b3e7edeSFlorian Westphal case SO_KEEPALIVE: 1831b3e7edeSFlorian Westphal mptcp_sol_socket_sync_intval(msk, optname, val); 1841b3e7edeSFlorian Westphal return 0; 185a03c99b2SFlorian Westphal case SO_DEBUG: 18636704413SFlorian Westphal case SO_MARK: 1871b3e7edeSFlorian Westphal case SO_PRIORITY: 1885d0a6bc8SFlorian Westphal case SO_SNDBUF: 1895d0a6bc8SFlorian Westphal case SO_SNDBUFFORCE: 1905d0a6bc8SFlorian Westphal case SO_RCVBUF: 1915d0a6bc8SFlorian Westphal case SO_RCVBUFFORCE: 1921b3e7edeSFlorian Westphal return mptcp_sol_socket_intval(msk, optname, val); 1936f0d7198SFlorian Westphal case SO_INCOMING_CPU: 1946f0d7198SFlorian Westphal mptcp_so_incoming_cpu(msk, val); 1956f0d7198SFlorian Westphal return 0; 1969061f24bSFlorian Westphal case SO_TIMESTAMP_OLD: 1979061f24bSFlorian Westphal case SO_TIMESTAMP_NEW: 1989061f24bSFlorian Westphal case SO_TIMESTAMPNS_OLD: 1999061f24bSFlorian Westphal case SO_TIMESTAMPNS_NEW: 2009061f24bSFlorian Westphal return mptcp_setsockopt_sol_socket_tstamp(msk, optname, val); 2011b3e7edeSFlorian Westphal } 2021b3e7edeSFlorian Westphal 2031b3e7edeSFlorian Westphal return -ENOPROTOOPT; 2041b3e7edeSFlorian Westphal } 2051b3e7edeSFlorian Westphal 2066c9a0a0fSYangbo Lu static int mptcp_setsockopt_sol_socket_timestamping(struct mptcp_sock *msk, 2076c9a0a0fSYangbo Lu int optname, 2086c9a0a0fSYangbo Lu sockptr_t optval, 2096c9a0a0fSYangbo Lu unsigned int optlen) 2106c9a0a0fSYangbo Lu { 2116c9a0a0fSYangbo Lu struct mptcp_subflow_context *subflow; 2126c9a0a0fSYangbo Lu struct sock *sk = (struct sock *)msk; 213d463126eSYangbo Lu struct so_timestamping timestamping; 214d463126eSYangbo Lu int ret; 2156c9a0a0fSYangbo Lu 216d463126eSYangbo Lu if (optlen == sizeof(timestamping)) { 217d463126eSYangbo Lu if (copy_from_sockptr(×tamping, optval, 218d463126eSYangbo Lu sizeof(timestamping))) 219d463126eSYangbo Lu return -EFAULT; 220d463126eSYangbo Lu } else if (optlen == sizeof(int)) { 221d463126eSYangbo Lu memset(×tamping, 0, sizeof(timestamping)); 222d463126eSYangbo Lu 223d463126eSYangbo Lu if (copy_from_sockptr(×tamping.flags, optval, sizeof(int))) 224d463126eSYangbo Lu return -EFAULT; 225d463126eSYangbo Lu } else { 226d463126eSYangbo Lu return -EINVAL; 227d463126eSYangbo Lu } 2286c9a0a0fSYangbo Lu 2296c9a0a0fSYangbo Lu ret = sock_setsockopt(sk->sk_socket, SOL_SOCKET, optname, 230d463126eSYangbo Lu KERNEL_SOCKPTR(×tamping), 231d463126eSYangbo Lu sizeof(timestamping)); 2326c9a0a0fSYangbo Lu if (ret) 2336c9a0a0fSYangbo Lu return ret; 2346c9a0a0fSYangbo Lu 2356c9a0a0fSYangbo Lu lock_sock(sk); 2366c9a0a0fSYangbo Lu 2376c9a0a0fSYangbo Lu mptcp_for_each_subflow(msk, subflow) { 2386c9a0a0fSYangbo Lu struct sock *ssk = mptcp_subflow_tcp_sock(subflow); 2396c9a0a0fSYangbo Lu bool slow = lock_sock_fast(ssk); 2406c9a0a0fSYangbo Lu 241d463126eSYangbo Lu sock_set_timestamping(sk, optname, timestamping); 2426c9a0a0fSYangbo Lu unlock_sock_fast(ssk, slow); 2436c9a0a0fSYangbo Lu } 2446c9a0a0fSYangbo Lu 2456c9a0a0fSYangbo Lu release_sock(sk); 2466c9a0a0fSYangbo Lu 2476c9a0a0fSYangbo Lu return 0; 2486c9a0a0fSYangbo Lu } 2496c9a0a0fSYangbo Lu 250268b1238SFlorian Westphal static int mptcp_setsockopt_sol_socket_linger(struct mptcp_sock *msk, sockptr_t optval, 251268b1238SFlorian Westphal unsigned int optlen) 252268b1238SFlorian Westphal { 253268b1238SFlorian Westphal struct mptcp_subflow_context *subflow; 254268b1238SFlorian Westphal struct sock *sk = (struct sock *)msk; 255268b1238SFlorian Westphal struct linger ling; 256268b1238SFlorian Westphal sockptr_t kopt; 257268b1238SFlorian Westphal int ret; 258268b1238SFlorian Westphal 259268b1238SFlorian Westphal if (optlen < sizeof(ling)) 260268b1238SFlorian Westphal return -EINVAL; 261268b1238SFlorian Westphal 262268b1238SFlorian Westphal if (copy_from_sockptr(&ling, optval, sizeof(ling))) 263268b1238SFlorian Westphal return -EFAULT; 264268b1238SFlorian Westphal 265268b1238SFlorian Westphal kopt = KERNEL_SOCKPTR(&ling); 266268b1238SFlorian Westphal ret = sock_setsockopt(sk->sk_socket, SOL_SOCKET, SO_LINGER, kopt, sizeof(ling)); 267268b1238SFlorian Westphal if (ret) 268268b1238SFlorian Westphal return ret; 269268b1238SFlorian Westphal 270268b1238SFlorian Westphal lock_sock(sk); 271268b1238SFlorian Westphal sockopt_seq_inc(msk); 272268b1238SFlorian Westphal mptcp_for_each_subflow(msk, subflow) { 273268b1238SFlorian Westphal struct sock *ssk = mptcp_subflow_tcp_sock(subflow); 274268b1238SFlorian Westphal bool slow = lock_sock_fast(ssk); 275268b1238SFlorian Westphal 276268b1238SFlorian Westphal if (!ling.l_onoff) { 277268b1238SFlorian Westphal sock_reset_flag(ssk, SOCK_LINGER); 278268b1238SFlorian Westphal } else { 279268b1238SFlorian Westphal ssk->sk_lingertime = sk->sk_lingertime; 280268b1238SFlorian Westphal sock_set_flag(ssk, SOCK_LINGER); 281268b1238SFlorian Westphal } 282268b1238SFlorian Westphal 283268b1238SFlorian Westphal subflow->setsockopt_seq = msk->setsockopt_seq; 284268b1238SFlorian Westphal unlock_sock_fast(ssk, slow); 285268b1238SFlorian Westphal } 286268b1238SFlorian Westphal 287268b1238SFlorian Westphal release_sock(sk); 288268b1238SFlorian Westphal return 0; 289268b1238SFlorian Westphal } 290268b1238SFlorian Westphal 2910abdde82SPaolo Abeni static int mptcp_setsockopt_sol_socket(struct mptcp_sock *msk, int optname, 2920abdde82SPaolo Abeni sockptr_t optval, unsigned int optlen) 2930abdde82SPaolo Abeni { 2940abdde82SPaolo Abeni struct sock *sk = (struct sock *)msk; 2950abdde82SPaolo Abeni struct socket *ssock; 296*f0bc514bSPaolo Abeni struct sock *ssk; 2970abdde82SPaolo Abeni int ret; 2980abdde82SPaolo Abeni 2990abdde82SPaolo Abeni switch (optname) { 3000abdde82SPaolo Abeni case SO_REUSEPORT: 3010abdde82SPaolo Abeni case SO_REUSEADDR: 3025d0a6bc8SFlorian Westphal case SO_BINDTODEVICE: 3035d0a6bc8SFlorian Westphal case SO_BINDTOIFINDEX: 3040abdde82SPaolo Abeni lock_sock(sk); 3050abdde82SPaolo Abeni ssock = __mptcp_nmpc_socket(msk); 306ddb1a072SPaolo Abeni if (IS_ERR(ssock)) { 3070abdde82SPaolo Abeni release_sock(sk); 308ddb1a072SPaolo Abeni return PTR_ERR(ssock); 3090abdde82SPaolo Abeni } 3100abdde82SPaolo Abeni 311*f0bc514bSPaolo Abeni ssk = msk->first; 312*f0bc514bSPaolo Abeni ret = sk_setsockopt(ssk, SOL_SOCKET, optname, optval, optlen); 3130abdde82SPaolo Abeni if (ret == 0) { 3140abdde82SPaolo Abeni if (optname == SO_REUSEPORT) 315*f0bc514bSPaolo Abeni sk->sk_reuseport = ssk->sk_reuseport; 3160abdde82SPaolo Abeni else if (optname == SO_REUSEADDR) 317*f0bc514bSPaolo Abeni sk->sk_reuse = ssk->sk_reuse; 3185d0a6bc8SFlorian Westphal else if (optname == SO_BINDTODEVICE) 319*f0bc514bSPaolo Abeni sk->sk_bound_dev_if = ssk->sk_bound_dev_if; 3205d0a6bc8SFlorian Westphal else if (optname == SO_BINDTOIFINDEX) 321*f0bc514bSPaolo Abeni sk->sk_bound_dev_if = ssk->sk_bound_dev_if; 3220abdde82SPaolo Abeni } 3230abdde82SPaolo Abeni release_sock(sk); 3240abdde82SPaolo Abeni return ret; 3251b3e7edeSFlorian Westphal case SO_KEEPALIVE: 3261b3e7edeSFlorian Westphal case SO_PRIORITY: 3275d0a6bc8SFlorian Westphal case SO_SNDBUF: 3285d0a6bc8SFlorian Westphal case SO_SNDBUFFORCE: 3295d0a6bc8SFlorian Westphal case SO_RCVBUF: 3305d0a6bc8SFlorian Westphal case SO_RCVBUFFORCE: 33136704413SFlorian Westphal case SO_MARK: 3326f0d7198SFlorian Westphal case SO_INCOMING_CPU: 333a03c99b2SFlorian Westphal case SO_DEBUG: 3349061f24bSFlorian Westphal case SO_TIMESTAMP_OLD: 3359061f24bSFlorian Westphal case SO_TIMESTAMP_NEW: 3369061f24bSFlorian Westphal case SO_TIMESTAMPNS_OLD: 3379061f24bSFlorian Westphal case SO_TIMESTAMPNS_NEW: 3386c9a0a0fSYangbo Lu return mptcp_setsockopt_sol_socket_int(msk, optname, optval, 3396c9a0a0fSYangbo Lu optlen); 3409061f24bSFlorian Westphal case SO_TIMESTAMPING_OLD: 3419061f24bSFlorian Westphal case SO_TIMESTAMPING_NEW: 3426c9a0a0fSYangbo Lu return mptcp_setsockopt_sol_socket_timestamping(msk, optname, 3436c9a0a0fSYangbo Lu optval, optlen); 344268b1238SFlorian Westphal case SO_LINGER: 345268b1238SFlorian Westphal return mptcp_setsockopt_sol_socket_linger(msk, optval, optlen); 3467a009a70SFlorian Westphal case SO_RCVLOWAT: 3477a009a70SFlorian Westphal case SO_RCVTIMEO_OLD: 3487a009a70SFlorian Westphal case SO_RCVTIMEO_NEW: 349d6ab5ea2SGeliang Tang case SO_SNDTIMEO_OLD: 350d6ab5ea2SGeliang Tang case SO_SNDTIMEO_NEW: 3517a009a70SFlorian Westphal case SO_BUSY_POLL: 3527a009a70SFlorian Westphal case SO_PREFER_BUSY_POLL: 3537a009a70SFlorian Westphal case SO_BUSY_POLL_BUDGET: 3547a009a70SFlorian Westphal /* No need to copy: only relevant for msk */ 3557a009a70SFlorian Westphal return sock_setsockopt(sk->sk_socket, SOL_SOCKET, optname, optval, optlen); 356a03c99b2SFlorian Westphal case SO_NO_CHECK: 357a03c99b2SFlorian Westphal case SO_DONTROUTE: 358a03c99b2SFlorian Westphal case SO_BROADCAST: 359a03c99b2SFlorian Westphal case SO_BSDCOMPAT: 360a03c99b2SFlorian Westphal case SO_PASSCRED: 3615e2ff670SAlexander Mikhalitsyn case SO_PASSPIDFD: 362a03c99b2SFlorian Westphal case SO_PASSSEC: 363a03c99b2SFlorian Westphal case SO_RXQ_OVFL: 364a03c99b2SFlorian Westphal case SO_WIFI_STATUS: 365a03c99b2SFlorian Westphal case SO_NOFCS: 366a03c99b2SFlorian Westphal case SO_SELECT_ERR_QUEUE: 367a03c99b2SFlorian Westphal return 0; 3680abdde82SPaolo Abeni } 3690abdde82SPaolo Abeni 3707a009a70SFlorian Westphal /* SO_OOBINLINE is not supported, let's avoid the related mess 3717a009a70SFlorian Westphal * SO_ATTACH_FILTER, SO_ATTACH_BPF, SO_ATTACH_REUSEPORT_CBPF, 3727a009a70SFlorian Westphal * SO_DETACH_REUSEPORT_BPF, SO_DETACH_FILTER, SO_LOCK_FILTER, 3737a009a70SFlorian Westphal * we must be careful with subflows 3747a009a70SFlorian Westphal * 3757a009a70SFlorian Westphal * SO_ATTACH_REUSEPORT_EBPF is not supported, at it checks 3767a009a70SFlorian Westphal * explicitly the sk_protocol field 3777a009a70SFlorian Westphal * 3787a009a70SFlorian Westphal * SO_PEEK_OFF is unsupported, as it is for plain TCP 3797a009a70SFlorian Westphal * SO_MAX_PACING_RATE is unsupported, we must be careful with subflows 3807a009a70SFlorian Westphal * SO_CNX_ADVICE is currently unsupported, could possibly be relevant, 3817a009a70SFlorian Westphal * but likely needs careful design 3827a009a70SFlorian Westphal * 3837a009a70SFlorian Westphal * SO_ZEROCOPY is currently unsupported, TODO in sndmsg 3847a009a70SFlorian Westphal * SO_TXTIME is currently unsupported 3857a009a70SFlorian Westphal */ 3867a009a70SFlorian Westphal 3877a009a70SFlorian Westphal return -EOPNOTSUPP; 3880abdde82SPaolo Abeni } 3890abdde82SPaolo Abeni 3900abdde82SPaolo Abeni static int mptcp_setsockopt_v6(struct mptcp_sock *msk, int optname, 3910abdde82SPaolo Abeni sockptr_t optval, unsigned int optlen) 3920abdde82SPaolo Abeni { 3930abdde82SPaolo Abeni struct sock *sk = (struct sock *)msk; 3940abdde82SPaolo Abeni int ret = -EOPNOTSUPP; 3950abdde82SPaolo Abeni struct socket *ssock; 396*f0bc514bSPaolo Abeni struct sock *ssk; 3970abdde82SPaolo Abeni 3980abdde82SPaolo Abeni switch (optname) { 3990abdde82SPaolo Abeni case IPV6_V6ONLY: 400c9406a23SFlorian Westphal case IPV6_TRANSPARENT: 401c9406a23SFlorian Westphal case IPV6_FREEBIND: 4020abdde82SPaolo Abeni lock_sock(sk); 4030abdde82SPaolo Abeni ssock = __mptcp_nmpc_socket(msk); 404ddb1a072SPaolo Abeni if (IS_ERR(ssock)) { 4050abdde82SPaolo Abeni release_sock(sk); 406ddb1a072SPaolo Abeni return PTR_ERR(ssock); 4070abdde82SPaolo Abeni } 4080abdde82SPaolo Abeni 409*f0bc514bSPaolo Abeni ssk = msk->first; 410*f0bc514bSPaolo Abeni ret = tcp_setsockopt(ssk, SOL_IPV6, optname, optval, optlen); 411c9406a23SFlorian Westphal if (ret != 0) { 412c9406a23SFlorian Westphal release_sock(sk); 413c9406a23SFlorian Westphal return ret; 414c9406a23SFlorian Westphal } 415c9406a23SFlorian Westphal 416c9406a23SFlorian Westphal sockopt_seq_inc(msk); 417c9406a23SFlorian Westphal 418c9406a23SFlorian Westphal switch (optname) { 419c9406a23SFlorian Westphal case IPV6_V6ONLY: 420*f0bc514bSPaolo Abeni sk->sk_ipv6only = ssk->sk_ipv6only; 421c9406a23SFlorian Westphal break; 422c9406a23SFlorian Westphal case IPV6_TRANSPARENT: 423*f0bc514bSPaolo Abeni inet_sk(sk)->transparent = inet_sk(ssk)->transparent; 424c9406a23SFlorian Westphal break; 425c9406a23SFlorian Westphal case IPV6_FREEBIND: 426*f0bc514bSPaolo Abeni inet_sk(sk)->freebind = inet_sk(ssk)->freebind; 427c9406a23SFlorian Westphal break; 428c9406a23SFlorian Westphal } 4290abdde82SPaolo Abeni 4300abdde82SPaolo Abeni release_sock(sk); 4310abdde82SPaolo Abeni break; 4320abdde82SPaolo Abeni } 4330abdde82SPaolo Abeni 4340abdde82SPaolo Abeni return ret; 4350abdde82SPaolo Abeni } 4360abdde82SPaolo Abeni 437d9e4c129SPaolo Abeni static bool mptcp_supported_sockopt(int level, int optname) 438d9e4c129SPaolo Abeni { 439d9e4c129SPaolo Abeni if (level == SOL_IP) { 440d9e4c129SPaolo Abeni switch (optname) { 441d9e4c129SPaolo Abeni /* should work fine */ 442d9e4c129SPaolo Abeni case IP_FREEBIND: 443d9e4c129SPaolo Abeni case IP_TRANSPARENT: 444d9e4c129SPaolo Abeni 445d9e4c129SPaolo Abeni /* the following are control cmsg related */ 446d9e4c129SPaolo Abeni case IP_PKTINFO: 447d9e4c129SPaolo Abeni case IP_RECVTTL: 448d9e4c129SPaolo Abeni case IP_RECVTOS: 449d9e4c129SPaolo Abeni case IP_RECVOPTS: 450d9e4c129SPaolo Abeni case IP_RETOPTS: 451d9e4c129SPaolo Abeni case IP_PASSSEC: 452d9e4c129SPaolo Abeni case IP_RECVORIGDSTADDR: 453d9e4c129SPaolo Abeni case IP_CHECKSUM: 454d9e4c129SPaolo Abeni case IP_RECVFRAGSIZE: 455d9e4c129SPaolo Abeni 456d9e4c129SPaolo Abeni /* common stuff that need some love */ 457d9e4c129SPaolo Abeni case IP_TOS: 458d9e4c129SPaolo Abeni case IP_TTL: 459d9e4c129SPaolo Abeni case IP_BIND_ADDRESS_NO_PORT: 460d9e4c129SPaolo Abeni case IP_MTU_DISCOVER: 461d9e4c129SPaolo Abeni case IP_RECVERR: 462d9e4c129SPaolo Abeni 463d9e4c129SPaolo Abeni /* possibly less common may deserve some love */ 464d9e4c129SPaolo Abeni case IP_MINTTL: 465d9e4c129SPaolo Abeni 466d9e4c129SPaolo Abeni /* the following is apparently a no-op for plain TCP */ 467d9e4c129SPaolo Abeni case IP_RECVERR_RFC4884: 468d9e4c129SPaolo Abeni return true; 469d9e4c129SPaolo Abeni } 470d9e4c129SPaolo Abeni 471d9e4c129SPaolo Abeni /* IP_OPTIONS is not supported, needs subflow care */ 472d9e4c129SPaolo Abeni /* IP_HDRINCL, IP_NODEFRAG are not supported, RAW specific */ 473d9e4c129SPaolo Abeni /* IP_MULTICAST_TTL, IP_MULTICAST_LOOP, IP_UNICAST_IF, 474d9e4c129SPaolo Abeni * IP_ADD_MEMBERSHIP, IP_ADD_SOURCE_MEMBERSHIP, IP_DROP_MEMBERSHIP, 475d9e4c129SPaolo Abeni * IP_DROP_SOURCE_MEMBERSHIP, IP_BLOCK_SOURCE, IP_UNBLOCK_SOURCE, 476d9e4c129SPaolo Abeni * MCAST_JOIN_GROUP, MCAST_LEAVE_GROUP MCAST_JOIN_SOURCE_GROUP, 477d9e4c129SPaolo Abeni * MCAST_LEAVE_SOURCE_GROUP, MCAST_BLOCK_SOURCE, MCAST_UNBLOCK_SOURCE, 478d9e4c129SPaolo Abeni * MCAST_MSFILTER, IP_MULTICAST_ALL are not supported, better not deal 479d9e4c129SPaolo Abeni * with mcast stuff 480d9e4c129SPaolo Abeni */ 481d9e4c129SPaolo Abeni /* IP_IPSEC_POLICY, IP_XFRM_POLICY are nut supported, unrelated here */ 482d9e4c129SPaolo Abeni return false; 483d9e4c129SPaolo Abeni } 484d9e4c129SPaolo Abeni if (level == SOL_IPV6) { 485d9e4c129SPaolo Abeni switch (optname) { 486d9e4c129SPaolo Abeni case IPV6_V6ONLY: 487d9e4c129SPaolo Abeni 488d9e4c129SPaolo Abeni /* the following are control cmsg related */ 489d9e4c129SPaolo Abeni case IPV6_RECVPKTINFO: 490d9e4c129SPaolo Abeni case IPV6_2292PKTINFO: 491d9e4c129SPaolo Abeni case IPV6_RECVHOPLIMIT: 492d9e4c129SPaolo Abeni case IPV6_2292HOPLIMIT: 493d9e4c129SPaolo Abeni case IPV6_RECVRTHDR: 494d9e4c129SPaolo Abeni case IPV6_2292RTHDR: 495d9e4c129SPaolo Abeni case IPV6_RECVHOPOPTS: 496d9e4c129SPaolo Abeni case IPV6_2292HOPOPTS: 497d9e4c129SPaolo Abeni case IPV6_RECVDSTOPTS: 498d9e4c129SPaolo Abeni case IPV6_2292DSTOPTS: 499d9e4c129SPaolo Abeni case IPV6_RECVTCLASS: 500d9e4c129SPaolo Abeni case IPV6_FLOWINFO: 501d9e4c129SPaolo Abeni case IPV6_RECVPATHMTU: 502d9e4c129SPaolo Abeni case IPV6_RECVORIGDSTADDR: 503d9e4c129SPaolo Abeni case IPV6_RECVFRAGSIZE: 504d9e4c129SPaolo Abeni 505d9e4c129SPaolo Abeni /* the following ones need some love but are quite common */ 506d9e4c129SPaolo Abeni case IPV6_TCLASS: 507d9e4c129SPaolo Abeni case IPV6_TRANSPARENT: 508d9e4c129SPaolo Abeni case IPV6_FREEBIND: 509d9e4c129SPaolo Abeni case IPV6_PKTINFO: 510d9e4c129SPaolo Abeni case IPV6_2292PKTOPTIONS: 511d9e4c129SPaolo Abeni case IPV6_UNICAST_HOPS: 512d9e4c129SPaolo Abeni case IPV6_MTU_DISCOVER: 513d9e4c129SPaolo Abeni case IPV6_MTU: 514d9e4c129SPaolo Abeni case IPV6_RECVERR: 515d9e4c129SPaolo Abeni case IPV6_FLOWINFO_SEND: 516d9e4c129SPaolo Abeni case IPV6_FLOWLABEL_MGR: 517d9e4c129SPaolo Abeni case IPV6_MINHOPCOUNT: 518d9e4c129SPaolo Abeni case IPV6_DONTFRAG: 519d9e4c129SPaolo Abeni case IPV6_AUTOFLOWLABEL: 520d9e4c129SPaolo Abeni 521d9e4c129SPaolo Abeni /* the following one is a no-op for plain TCP */ 522d9e4c129SPaolo Abeni case IPV6_RECVERR_RFC4884: 523d9e4c129SPaolo Abeni return true; 524d9e4c129SPaolo Abeni } 525d9e4c129SPaolo Abeni 526d9e4c129SPaolo Abeni /* IPV6_HOPOPTS, IPV6_RTHDRDSTOPTS, IPV6_RTHDR, IPV6_DSTOPTS are 527d9e4c129SPaolo Abeni * not supported 528d9e4c129SPaolo Abeni */ 529d9e4c129SPaolo Abeni /* IPV6_MULTICAST_HOPS, IPV6_MULTICAST_LOOP, IPV6_UNICAST_IF, 530d9e4c129SPaolo Abeni * IPV6_MULTICAST_IF, IPV6_ADDRFORM, 531d9e4c129SPaolo Abeni * IPV6_ADD_MEMBERSHIP, IPV6_DROP_MEMBERSHIP, IPV6_JOIN_ANYCAST, 532d9e4c129SPaolo Abeni * IPV6_LEAVE_ANYCAST, IPV6_MULTICAST_ALL, MCAST_JOIN_GROUP, MCAST_LEAVE_GROUP, 533d9e4c129SPaolo Abeni * MCAST_JOIN_SOURCE_GROUP, MCAST_LEAVE_SOURCE_GROUP, 534d9e4c129SPaolo Abeni * MCAST_BLOCK_SOURCE, MCAST_UNBLOCK_SOURCE, MCAST_MSFILTER 535d9e4c129SPaolo Abeni * are not supported better not deal with mcast 536d9e4c129SPaolo Abeni */ 537d9e4c129SPaolo Abeni /* IPV6_ROUTER_ALERT, IPV6_ROUTER_ALERT_ISOLATE are not supported, since are evil */ 538d9e4c129SPaolo Abeni 539d9e4c129SPaolo Abeni /* IPV6_IPSEC_POLICY, IPV6_XFRM_POLICY are not supported */ 540d9e4c129SPaolo Abeni /* IPV6_ADDR_PREFERENCES is not supported, we must be careful with subflows */ 541d9e4c129SPaolo Abeni return false; 542d9e4c129SPaolo Abeni } 543d9e4c129SPaolo Abeni if (level == SOL_TCP) { 544d9e4c129SPaolo Abeni switch (optname) { 545d9e4c129SPaolo Abeni /* the following are no-op or should work just fine */ 546d9e4c129SPaolo Abeni case TCP_THIN_DUPACK: 547d9e4c129SPaolo Abeni case TCP_DEFER_ACCEPT: 548d9e4c129SPaolo Abeni 549d9e4c129SPaolo Abeni /* the following need some love */ 550d9e4c129SPaolo Abeni case TCP_MAXSEG: 551d9e4c129SPaolo Abeni case TCP_NODELAY: 552d9e4c129SPaolo Abeni case TCP_THIN_LINEAR_TIMEOUTS: 553d9e4c129SPaolo Abeni case TCP_CONGESTION: 554d9e4c129SPaolo Abeni case TCP_CORK: 555d9e4c129SPaolo Abeni case TCP_KEEPIDLE: 556d9e4c129SPaolo Abeni case TCP_KEEPINTVL: 557d9e4c129SPaolo Abeni case TCP_KEEPCNT: 558d9e4c129SPaolo Abeni case TCP_SYNCNT: 559d9e4c129SPaolo Abeni case TCP_SAVE_SYN: 560d9e4c129SPaolo Abeni case TCP_LINGER2: 561d9e4c129SPaolo Abeni case TCP_WINDOW_CLAMP: 562d9e4c129SPaolo Abeni case TCP_QUICKACK: 563d9e4c129SPaolo Abeni case TCP_USER_TIMEOUT: 564d9e4c129SPaolo Abeni case TCP_TIMESTAMP: 565d9e4c129SPaolo Abeni case TCP_NOTSENT_LOWAT: 566d9e4c129SPaolo Abeni case TCP_TX_DELAY: 5672c9e7765SFlorian Westphal case TCP_INQ: 5684ffb0a02SDmytro Shytyi case TCP_FASTOPEN: 56954635bd0SBenjamin Hesmans case TCP_FASTOPEN_CONNECT: 570cb99816cSMatthieu Baerts case TCP_FASTOPEN_KEY: 571e64d4debSMatthieu Baerts case TCP_FASTOPEN_NO_COOKIE: 572d9e4c129SPaolo Abeni return true; 573d9e4c129SPaolo Abeni } 574d9e4c129SPaolo Abeni 575d9e4c129SPaolo Abeni /* TCP_MD5SIG, TCP_MD5SIG_EXT are not supported, MD5 is not compatible with MPTCP */ 576d9e4c129SPaolo Abeni 577d9e4c129SPaolo Abeni /* TCP_REPAIR, TCP_REPAIR_QUEUE, TCP_QUEUE_SEQ, TCP_REPAIR_OPTIONS, 578d9e4c129SPaolo Abeni * TCP_REPAIR_WINDOW are not supported, better avoid this mess 579d9e4c129SPaolo Abeni */ 580d9e4c129SPaolo Abeni } 581d9e4c129SPaolo Abeni return false; 582d9e4c129SPaolo Abeni } 583d9e4c129SPaolo Abeni 584aa1fbd94SFlorian Westphal static int mptcp_setsockopt_sol_tcp_congestion(struct mptcp_sock *msk, sockptr_t optval, 585aa1fbd94SFlorian Westphal unsigned int optlen) 586aa1fbd94SFlorian Westphal { 587aa1fbd94SFlorian Westphal struct mptcp_subflow_context *subflow; 588aa1fbd94SFlorian Westphal struct sock *sk = (struct sock *)msk; 589aa1fbd94SFlorian Westphal char name[TCP_CA_NAME_MAX]; 590aa1fbd94SFlorian Westphal bool cap_net_admin; 591aa1fbd94SFlorian Westphal int ret; 592aa1fbd94SFlorian Westphal 593aa1fbd94SFlorian Westphal if (optlen < 1) 594aa1fbd94SFlorian Westphal return -EINVAL; 595aa1fbd94SFlorian Westphal 596aa1fbd94SFlorian Westphal ret = strncpy_from_sockptr(name, optval, 597aa1fbd94SFlorian Westphal min_t(long, TCP_CA_NAME_MAX - 1, optlen)); 598aa1fbd94SFlorian Westphal if (ret < 0) 599aa1fbd94SFlorian Westphal return -EFAULT; 600aa1fbd94SFlorian Westphal 601aa1fbd94SFlorian Westphal name[ret] = 0; 602aa1fbd94SFlorian Westphal 603aa1fbd94SFlorian Westphal cap_net_admin = ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN); 604aa1fbd94SFlorian Westphal 605aa1fbd94SFlorian Westphal ret = 0; 606aa1fbd94SFlorian Westphal lock_sock(sk); 607aa1fbd94SFlorian Westphal sockopt_seq_inc(msk); 608aa1fbd94SFlorian Westphal mptcp_for_each_subflow(msk, subflow) { 609aa1fbd94SFlorian Westphal struct sock *ssk = mptcp_subflow_tcp_sock(subflow); 610aa1fbd94SFlorian Westphal int err; 611aa1fbd94SFlorian Westphal 612aa1fbd94SFlorian Westphal lock_sock(ssk); 613aa1fbd94SFlorian Westphal err = tcp_set_congestion_control(ssk, name, true, cap_net_admin); 614aa1fbd94SFlorian Westphal if (err < 0 && ret == 0) 615aa1fbd94SFlorian Westphal ret = err; 616aa1fbd94SFlorian Westphal subflow->setsockopt_seq = msk->setsockopt_seq; 617aa1fbd94SFlorian Westphal release_sock(ssk); 618aa1fbd94SFlorian Westphal } 619aa1fbd94SFlorian Westphal 620aa1fbd94SFlorian Westphal if (ret == 0) 62120b5759fSPaolo Abeni strcpy(msk->ca_name, name); 622aa1fbd94SFlorian Westphal 623aa1fbd94SFlorian Westphal release_sock(sk); 624aa1fbd94SFlorian Westphal return ret; 625aa1fbd94SFlorian Westphal } 626aa1fbd94SFlorian Westphal 6274f6e14bdSMaxim Galaganov static int mptcp_setsockopt_sol_tcp_cork(struct mptcp_sock *msk, sockptr_t optval, 6284f6e14bdSMaxim Galaganov unsigned int optlen) 6294f6e14bdSMaxim Galaganov { 6304f6e14bdSMaxim Galaganov struct mptcp_subflow_context *subflow; 6314f6e14bdSMaxim Galaganov struct sock *sk = (struct sock *)msk; 6324f6e14bdSMaxim Galaganov int val; 6334f6e14bdSMaxim Galaganov 6344f6e14bdSMaxim Galaganov if (optlen < sizeof(int)) 6354f6e14bdSMaxim Galaganov return -EINVAL; 6364f6e14bdSMaxim Galaganov 6374f6e14bdSMaxim Galaganov if (copy_from_sockptr(&val, optval, sizeof(val))) 6384f6e14bdSMaxim Galaganov return -EFAULT; 6394f6e14bdSMaxim Galaganov 6404f6e14bdSMaxim Galaganov lock_sock(sk); 6414f6e14bdSMaxim Galaganov sockopt_seq_inc(msk); 6424f6e14bdSMaxim Galaganov msk->cork = !!val; 6434f6e14bdSMaxim Galaganov mptcp_for_each_subflow(msk, subflow) { 6444f6e14bdSMaxim Galaganov struct sock *ssk = mptcp_subflow_tcp_sock(subflow); 6454f6e14bdSMaxim Galaganov 6464f6e14bdSMaxim Galaganov lock_sock(ssk); 6474f6e14bdSMaxim Galaganov __tcp_sock_set_cork(ssk, !!val); 6484f6e14bdSMaxim Galaganov release_sock(ssk); 6494f6e14bdSMaxim Galaganov } 6504f6e14bdSMaxim Galaganov if (!val) 6514f6e14bdSMaxim Galaganov mptcp_check_and_set_pending(sk); 6524f6e14bdSMaxim Galaganov release_sock(sk); 6534f6e14bdSMaxim Galaganov 6544f6e14bdSMaxim Galaganov return 0; 6554f6e14bdSMaxim Galaganov } 6564f6e14bdSMaxim Galaganov 6574f6e14bdSMaxim Galaganov static int mptcp_setsockopt_sol_tcp_nodelay(struct mptcp_sock *msk, sockptr_t optval, 6584f6e14bdSMaxim Galaganov unsigned int optlen) 6594f6e14bdSMaxim Galaganov { 6604f6e14bdSMaxim Galaganov struct mptcp_subflow_context *subflow; 6614f6e14bdSMaxim Galaganov struct sock *sk = (struct sock *)msk; 6624f6e14bdSMaxim Galaganov int val; 6634f6e14bdSMaxim Galaganov 6644f6e14bdSMaxim Galaganov if (optlen < sizeof(int)) 6654f6e14bdSMaxim Galaganov return -EINVAL; 6664f6e14bdSMaxim Galaganov 6674f6e14bdSMaxim Galaganov if (copy_from_sockptr(&val, optval, sizeof(val))) 6684f6e14bdSMaxim Galaganov return -EFAULT; 6694f6e14bdSMaxim Galaganov 6704f6e14bdSMaxim Galaganov lock_sock(sk); 6714f6e14bdSMaxim Galaganov sockopt_seq_inc(msk); 6724f6e14bdSMaxim Galaganov msk->nodelay = !!val; 6734f6e14bdSMaxim Galaganov mptcp_for_each_subflow(msk, subflow) { 6744f6e14bdSMaxim Galaganov struct sock *ssk = mptcp_subflow_tcp_sock(subflow); 6754f6e14bdSMaxim Galaganov 6764f6e14bdSMaxim Galaganov lock_sock(ssk); 6774f6e14bdSMaxim Galaganov __tcp_sock_set_nodelay(ssk, !!val); 6784f6e14bdSMaxim Galaganov release_sock(ssk); 6794f6e14bdSMaxim Galaganov } 6804f6e14bdSMaxim Galaganov if (val) 6814f6e14bdSMaxim Galaganov mptcp_check_and_set_pending(sk); 6824f6e14bdSMaxim Galaganov release_sock(sk); 6834f6e14bdSMaxim Galaganov 6844f6e14bdSMaxim Galaganov return 0; 6854f6e14bdSMaxim Galaganov } 6864f6e14bdSMaxim Galaganov 687c9406a23SFlorian Westphal static int mptcp_setsockopt_sol_ip_set_transparent(struct mptcp_sock *msk, int optname, 688c9406a23SFlorian Westphal sockptr_t optval, unsigned int optlen) 689c9406a23SFlorian Westphal { 690c9406a23SFlorian Westphal struct sock *sk = (struct sock *)msk; 691c9406a23SFlorian Westphal struct inet_sock *issk; 692c9406a23SFlorian Westphal struct socket *ssock; 693c9406a23SFlorian Westphal int err; 694c9406a23SFlorian Westphal 695c9406a23SFlorian Westphal err = ip_setsockopt(sk, SOL_IP, optname, optval, optlen); 696c9406a23SFlorian Westphal if (err != 0) 697c9406a23SFlorian Westphal return err; 698c9406a23SFlorian Westphal 699c9406a23SFlorian Westphal lock_sock(sk); 700c9406a23SFlorian Westphal 701c9406a23SFlorian Westphal ssock = __mptcp_nmpc_socket(msk); 702ddb1a072SPaolo Abeni if (IS_ERR(ssock)) { 703c9406a23SFlorian Westphal release_sock(sk); 704ddb1a072SPaolo Abeni return PTR_ERR(ssock); 705c9406a23SFlorian Westphal } 706c9406a23SFlorian Westphal 707*f0bc514bSPaolo Abeni issk = inet_sk(msk->first); 708c9406a23SFlorian Westphal 709c9406a23SFlorian Westphal switch (optname) { 710c9406a23SFlorian Westphal case IP_FREEBIND: 711c9406a23SFlorian Westphal issk->freebind = inet_sk(sk)->freebind; 712c9406a23SFlorian Westphal break; 713c9406a23SFlorian Westphal case IP_TRANSPARENT: 714c9406a23SFlorian Westphal issk->transparent = inet_sk(sk)->transparent; 715c9406a23SFlorian Westphal break; 716c9406a23SFlorian Westphal default: 717c9406a23SFlorian Westphal release_sock(sk); 718c9406a23SFlorian Westphal WARN_ON_ONCE(1); 719c9406a23SFlorian Westphal return -EOPNOTSUPP; 720c9406a23SFlorian Westphal } 721c9406a23SFlorian Westphal 722c9406a23SFlorian Westphal sockopt_seq_inc(msk); 723c9406a23SFlorian Westphal release_sock(sk); 724c9406a23SFlorian Westphal return 0; 725c9406a23SFlorian Westphal } 726c9406a23SFlorian Westphal 727ffcacff8SPoorva Sonparote static int mptcp_setsockopt_v4_set_tos(struct mptcp_sock *msk, int optname, 728ffcacff8SPoorva Sonparote sockptr_t optval, unsigned int optlen) 729ffcacff8SPoorva Sonparote { 730ffcacff8SPoorva Sonparote struct mptcp_subflow_context *subflow; 731ffcacff8SPoorva Sonparote struct sock *sk = (struct sock *)msk; 732ffcacff8SPoorva Sonparote int err, val; 733ffcacff8SPoorva Sonparote 734ffcacff8SPoorva Sonparote err = ip_setsockopt(sk, SOL_IP, optname, optval, optlen); 735ffcacff8SPoorva Sonparote 736ffcacff8SPoorva Sonparote if (err != 0) 737ffcacff8SPoorva Sonparote return err; 738ffcacff8SPoorva Sonparote 739ffcacff8SPoorva Sonparote lock_sock(sk); 740ffcacff8SPoorva Sonparote sockopt_seq_inc(msk); 741ffcacff8SPoorva Sonparote val = inet_sk(sk)->tos; 742ffcacff8SPoorva Sonparote mptcp_for_each_subflow(msk, subflow) { 743ffcacff8SPoorva Sonparote struct sock *ssk = mptcp_subflow_tcp_sock(subflow); 744ffcacff8SPoorva Sonparote 745ffcacff8SPoorva Sonparote __ip_sock_set_tos(ssk, val); 746ffcacff8SPoorva Sonparote } 747ffcacff8SPoorva Sonparote release_sock(sk); 748ffcacff8SPoorva Sonparote 74903e7d28cSMatthieu Baerts return 0; 750ffcacff8SPoorva Sonparote } 751ffcacff8SPoorva Sonparote 752ffcacff8SPoorva Sonparote static int mptcp_setsockopt_v4(struct mptcp_sock *msk, int optname, 753ffcacff8SPoorva Sonparote sockptr_t optval, unsigned int optlen) 754ffcacff8SPoorva Sonparote { 755ffcacff8SPoorva Sonparote switch (optname) { 756c9406a23SFlorian Westphal case IP_FREEBIND: 757c9406a23SFlorian Westphal case IP_TRANSPARENT: 758c9406a23SFlorian Westphal return mptcp_setsockopt_sol_ip_set_transparent(msk, optname, optval, optlen); 759ffcacff8SPoorva Sonparote case IP_TOS: 760ffcacff8SPoorva Sonparote return mptcp_setsockopt_v4_set_tos(msk, optname, optval, optlen); 761ffcacff8SPoorva Sonparote } 762ffcacff8SPoorva Sonparote 763ffcacff8SPoorva Sonparote return -EOPNOTSUPP; 764ffcacff8SPoorva Sonparote } 765ffcacff8SPoorva Sonparote 766d3d42904SMatthieu Baerts static int mptcp_setsockopt_first_sf_only(struct mptcp_sock *msk, int level, int optname, 767d3d42904SMatthieu Baerts sockptr_t optval, unsigned int optlen) 76854635bd0SBenjamin Hesmans { 76921e43569SPaolo Abeni struct sock *sk = (struct sock *)msk; 77054635bd0SBenjamin Hesmans struct socket *sock; 771ddb1a072SPaolo Abeni int ret; 77254635bd0SBenjamin Hesmans 773d3d42904SMatthieu Baerts /* Limit to first subflow, before the connection establishment */ 77421e43569SPaolo Abeni lock_sock(sk); 77554635bd0SBenjamin Hesmans sock = __mptcp_nmpc_socket(msk); 776ddb1a072SPaolo Abeni if (IS_ERR(sock)) { 777ddb1a072SPaolo Abeni ret = PTR_ERR(sock); 77821e43569SPaolo Abeni goto unlock; 779ddb1a072SPaolo Abeni } 78054635bd0SBenjamin Hesmans 78121e43569SPaolo Abeni ret = tcp_setsockopt(sock->sk, level, optname, optval, optlen); 78221e43569SPaolo Abeni 78321e43569SPaolo Abeni unlock: 78421e43569SPaolo Abeni release_sock(sk); 78521e43569SPaolo Abeni return ret; 78654635bd0SBenjamin Hesmans } 78754635bd0SBenjamin Hesmans 788aa1fbd94SFlorian Westphal static int mptcp_setsockopt_sol_tcp(struct mptcp_sock *msk, int optname, 789aa1fbd94SFlorian Westphal sockptr_t optval, unsigned int optlen) 790aa1fbd94SFlorian Westphal { 7912c9e7765SFlorian Westphal struct sock *sk = (void *)msk; 7922c9e7765SFlorian Westphal int ret, val; 7932c9e7765SFlorian Westphal 794aa1fbd94SFlorian Westphal switch (optname) { 7952c9e7765SFlorian Westphal case TCP_INQ: 7962c9e7765SFlorian Westphal ret = mptcp_get_int_option(msk, optval, optlen, &val); 7972c9e7765SFlorian Westphal if (ret) 7982c9e7765SFlorian Westphal return ret; 7992c9e7765SFlorian Westphal if (val < 0 || val > 1) 8002c9e7765SFlorian Westphal return -EINVAL; 8012c9e7765SFlorian Westphal 8022c9e7765SFlorian Westphal lock_sock(sk); 8032c9e7765SFlorian Westphal msk->recvmsg_inq = !!val; 8042c9e7765SFlorian Westphal release_sock(sk); 8052c9e7765SFlorian Westphal return 0; 806aa1fbd94SFlorian Westphal case TCP_ULP: 807aa1fbd94SFlorian Westphal return -EOPNOTSUPP; 808aa1fbd94SFlorian Westphal case TCP_CONGESTION: 809aa1fbd94SFlorian Westphal return mptcp_setsockopt_sol_tcp_congestion(msk, optval, optlen); 8104f6e14bdSMaxim Galaganov case TCP_CORK: 8114f6e14bdSMaxim Galaganov return mptcp_setsockopt_sol_tcp_cork(msk, optval, optlen); 8124f6e14bdSMaxim Galaganov case TCP_NODELAY: 8134f6e14bdSMaxim Galaganov return mptcp_setsockopt_sol_tcp_nodelay(msk, optval, optlen); 814ea1e301dSFlorian Westphal case TCP_DEFER_ACCEPT: 815caea6467SMatthieu Baerts /* See tcp.c: TCP_DEFER_ACCEPT does not fail */ 816caea6467SMatthieu Baerts mptcp_setsockopt_first_sf_only(msk, SOL_TCP, optname, optval, optlen); 817caea6467SMatthieu Baerts return 0; 8184ffb0a02SDmytro Shytyi case TCP_FASTOPEN: 81954635bd0SBenjamin Hesmans case TCP_FASTOPEN_CONNECT: 820cb99816cSMatthieu Baerts case TCP_FASTOPEN_KEY: 821e64d4debSMatthieu Baerts case TCP_FASTOPEN_NO_COOKIE: 822d3d42904SMatthieu Baerts return mptcp_setsockopt_first_sf_only(msk, SOL_TCP, optname, 823d3d42904SMatthieu Baerts optval, optlen); 824aa1fbd94SFlorian Westphal } 825aa1fbd94SFlorian Westphal 826aa1fbd94SFlorian Westphal return -EOPNOTSUPP; 827aa1fbd94SFlorian Westphal } 828aa1fbd94SFlorian Westphal 8290abdde82SPaolo Abeni int mptcp_setsockopt(struct sock *sk, int level, int optname, 8300abdde82SPaolo Abeni sockptr_t optval, unsigned int optlen) 8310abdde82SPaolo Abeni { 8320abdde82SPaolo Abeni struct mptcp_sock *msk = mptcp_sk(sk); 8330abdde82SPaolo Abeni struct sock *ssk; 8340abdde82SPaolo Abeni 8350abdde82SPaolo Abeni pr_debug("msk=%p", msk); 8360abdde82SPaolo Abeni 8370abdde82SPaolo Abeni if (level == SOL_SOCKET) 8380abdde82SPaolo Abeni return mptcp_setsockopt_sol_socket(msk, optname, optval, optlen); 8390abdde82SPaolo Abeni 8407a009a70SFlorian Westphal if (!mptcp_supported_sockopt(level, optname)) 8417a009a70SFlorian Westphal return -ENOPROTOOPT; 8427a009a70SFlorian Westphal 8430abdde82SPaolo Abeni /* @@ the meaning of setsockopt() when the socket is connected and 8440abdde82SPaolo Abeni * there are multiple subflows is not yet defined. It is up to the 8450abdde82SPaolo Abeni * MPTCP-level socket to configure the subflows until the subflow 8460abdde82SPaolo Abeni * is in TCP fallback, when TCP socket options are passed through 8470abdde82SPaolo Abeni * to the one remaining subflow. 8480abdde82SPaolo Abeni */ 8490abdde82SPaolo Abeni lock_sock(sk); 8500abdde82SPaolo Abeni ssk = __mptcp_tcp_fallback(msk); 8510abdde82SPaolo Abeni release_sock(sk); 8520abdde82SPaolo Abeni if (ssk) 8530abdde82SPaolo Abeni return tcp_setsockopt(ssk, level, optname, optval, optlen); 8540abdde82SPaolo Abeni 855ffcacff8SPoorva Sonparote if (level == SOL_IP) 856ffcacff8SPoorva Sonparote return mptcp_setsockopt_v4(msk, optname, optval, optlen); 857ffcacff8SPoorva Sonparote 8580abdde82SPaolo Abeni if (level == SOL_IPV6) 8590abdde82SPaolo Abeni return mptcp_setsockopt_v6(msk, optname, optval, optlen); 8600abdde82SPaolo Abeni 861aa1fbd94SFlorian Westphal if (level == SOL_TCP) 862aa1fbd94SFlorian Westphal return mptcp_setsockopt_sol_tcp(msk, optname, optval, optlen); 863aa1fbd94SFlorian Westphal 864aa1fbd94SFlorian Westphal return -EOPNOTSUPP; 865aa1fbd94SFlorian Westphal } 866aa1fbd94SFlorian Westphal 867aa1fbd94SFlorian Westphal static int mptcp_getsockopt_first_sf_only(struct mptcp_sock *msk, int level, int optname, 868aa1fbd94SFlorian Westphal char __user *optval, int __user *optlen) 869aa1fbd94SFlorian Westphal { 870aa1fbd94SFlorian Westphal struct sock *sk = (struct sock *)msk; 871aa1fbd94SFlorian Westphal struct socket *ssock; 872aa1fbd94SFlorian Westphal struct sock *ssk; 873*f0bc514bSPaolo Abeni int ret; 874aa1fbd94SFlorian Westphal 875aa1fbd94SFlorian Westphal lock_sock(sk); 876aa1fbd94SFlorian Westphal ssk = msk->first; 877aa1fbd94SFlorian Westphal if (ssk) { 878aa1fbd94SFlorian Westphal ret = tcp_getsockopt(ssk, level, optname, optval, optlen); 879aa1fbd94SFlorian Westphal goto out; 880aa1fbd94SFlorian Westphal } 881aa1fbd94SFlorian Westphal 882aa1fbd94SFlorian Westphal ssock = __mptcp_nmpc_socket(msk); 883ddb1a072SPaolo Abeni if (IS_ERR(ssock)) { 884ddb1a072SPaolo Abeni ret = PTR_ERR(ssock); 885aa1fbd94SFlorian Westphal goto out; 886ddb1a072SPaolo Abeni } 887aa1fbd94SFlorian Westphal 888*f0bc514bSPaolo Abeni ret = tcp_getsockopt(ssk, level, optname, optval, optlen); 889aa1fbd94SFlorian Westphal 890aa1fbd94SFlorian Westphal out: 891aa1fbd94SFlorian Westphal release_sock(sk); 892aa1fbd94SFlorian Westphal return ret; 893aa1fbd94SFlorian Westphal } 894aa1fbd94SFlorian Westphal 89561bc6e82SFlorian Westphal void mptcp_diag_fill_info(struct mptcp_sock *msk, struct mptcp_info *info) 89661bc6e82SFlorian Westphal { 89738967f42SPaolo Abeni struct sock *sk = (struct sock *)msk; 89861bc6e82SFlorian Westphal u32 flags = 0; 89938967f42SPaolo Abeni bool slow; 90061bc6e82SFlorian Westphal 90155c42fa7SFlorian Westphal memset(info, 0, sizeof(*info)); 90255c42fa7SFlorian Westphal 90361bc6e82SFlorian Westphal info->mptcpi_subflows = READ_ONCE(msk->pm.subflows); 90461bc6e82SFlorian Westphal info->mptcpi_add_addr_signal = READ_ONCE(msk->pm.add_addr_signaled); 90561bc6e82SFlorian Westphal info->mptcpi_add_addr_accepted = READ_ONCE(msk->pm.add_addr_accepted); 90661bc6e82SFlorian Westphal info->mptcpi_local_addr_used = READ_ONCE(msk->pm.local_addr_used); 907e925a032SMatthieu Baerts 90838967f42SPaolo Abeni if (inet_sk_state_load(sk) == TCP_LISTEN) 90938967f42SPaolo Abeni return; 91038967f42SPaolo Abeni 911e925a032SMatthieu Baerts /* The following limits only make sense for the in-kernel PM */ 912e925a032SMatthieu Baerts if (mptcp_pm_is_kernel(msk)) { 913e925a032SMatthieu Baerts info->mptcpi_subflows_max = 914e925a032SMatthieu Baerts mptcp_pm_get_subflows_max(msk); 915e925a032SMatthieu Baerts info->mptcpi_add_addr_signal_max = 916e925a032SMatthieu Baerts mptcp_pm_get_add_addr_signal_max(msk); 917e925a032SMatthieu Baerts info->mptcpi_add_addr_accepted_max = 918e925a032SMatthieu Baerts mptcp_pm_get_add_addr_accept_max(msk); 919e925a032SMatthieu Baerts info->mptcpi_local_addr_max = 920e925a032SMatthieu Baerts mptcp_pm_get_local_addr_max(msk); 921e925a032SMatthieu Baerts } 922e925a032SMatthieu Baerts 92361bc6e82SFlorian Westphal if (test_bit(MPTCP_FALLBACK_DONE, &msk->flags)) 92461bc6e82SFlorian Westphal flags |= MPTCP_INFO_FLAG_FALLBACK; 92561bc6e82SFlorian Westphal if (READ_ONCE(msk->can_ack)) 92661bc6e82SFlorian Westphal flags |= MPTCP_INFO_FLAG_REMOTE_KEY_RECEIVED; 92761bc6e82SFlorian Westphal info->mptcpi_flags = flags; 92838967f42SPaolo Abeni mptcp_data_lock(sk); 92938967f42SPaolo Abeni info->mptcpi_snd_una = msk->snd_una; 93038967f42SPaolo Abeni info->mptcpi_rcv_nxt = msk->ack_seq; 93138967f42SPaolo Abeni info->mptcpi_bytes_acked = msk->bytes_acked; 93238967f42SPaolo Abeni mptcp_data_unlock(sk); 93338967f42SPaolo Abeni 93438967f42SPaolo Abeni slow = lock_sock_fast(sk); 93538967f42SPaolo Abeni info->mptcpi_csum_enabled = msk->csum_enabled; 93638967f42SPaolo Abeni info->mptcpi_token = msk->token; 93738967f42SPaolo Abeni info->mptcpi_write_seq = msk->write_seq; 93838967f42SPaolo Abeni info->mptcpi_retransmits = inet_csk(sk)->icsk_retransmits; 93938967f42SPaolo Abeni info->mptcpi_bytes_sent = msk->bytes_sent; 94038967f42SPaolo Abeni info->mptcpi_bytes_received = msk->bytes_received; 94138967f42SPaolo Abeni info->mptcpi_bytes_retrans = msk->bytes_retrans; 94238967f42SPaolo Abeni unlock_sock_fast(sk, slow); 94361bc6e82SFlorian Westphal } 94461bc6e82SFlorian Westphal EXPORT_SYMBOL_GPL(mptcp_diag_fill_info); 94561bc6e82SFlorian Westphal 94655c42fa7SFlorian Westphal static int mptcp_getsockopt_info(struct mptcp_sock *msk, char __user *optval, int __user *optlen) 94755c42fa7SFlorian Westphal { 94855c42fa7SFlorian Westphal struct mptcp_info m_info; 94955c42fa7SFlorian Westphal int len; 95055c42fa7SFlorian Westphal 95155c42fa7SFlorian Westphal if (get_user(len, optlen)) 95255c42fa7SFlorian Westphal return -EFAULT; 95355c42fa7SFlorian Westphal 95455c42fa7SFlorian Westphal len = min_t(unsigned int, len, sizeof(struct mptcp_info)); 95555c42fa7SFlorian Westphal 95655c42fa7SFlorian Westphal mptcp_diag_fill_info(msk, &m_info); 95755c42fa7SFlorian Westphal 95855c42fa7SFlorian Westphal if (put_user(len, optlen)) 95955c42fa7SFlorian Westphal return -EFAULT; 96055c42fa7SFlorian Westphal 96155c42fa7SFlorian Westphal if (copy_to_user(optval, &m_info, len)) 96255c42fa7SFlorian Westphal return -EFAULT; 96355c42fa7SFlorian Westphal 96455c42fa7SFlorian Westphal return 0; 96555c42fa7SFlorian Westphal } 96655c42fa7SFlorian Westphal 96706f15ceeSFlorian Westphal static int mptcp_put_subflow_data(struct mptcp_subflow_data *sfd, 96806f15ceeSFlorian Westphal char __user *optval, 96906f15ceeSFlorian Westphal u32 copied, 97006f15ceeSFlorian Westphal int __user *optlen) 97106f15ceeSFlorian Westphal { 97206f15ceeSFlorian Westphal u32 copylen = min_t(u32, sfd->size_subflow_data, sizeof(*sfd)); 97306f15ceeSFlorian Westphal 97406f15ceeSFlorian Westphal if (copied) 97506f15ceeSFlorian Westphal copied += sfd->size_subflow_data; 97606f15ceeSFlorian Westphal else 97706f15ceeSFlorian Westphal copied = copylen; 97806f15ceeSFlorian Westphal 97906f15ceeSFlorian Westphal if (put_user(copied, optlen)) 98006f15ceeSFlorian Westphal return -EFAULT; 98106f15ceeSFlorian Westphal 98206f15ceeSFlorian Westphal if (copy_to_user(optval, sfd, copylen)) 98306f15ceeSFlorian Westphal return -EFAULT; 98406f15ceeSFlorian Westphal 98506f15ceeSFlorian Westphal return 0; 98606f15ceeSFlorian Westphal } 98706f15ceeSFlorian Westphal 98806f15ceeSFlorian Westphal static int mptcp_get_subflow_data(struct mptcp_subflow_data *sfd, 98949243207SPaolo Abeni char __user *optval, 99049243207SPaolo Abeni int __user *optlen) 99106f15ceeSFlorian Westphal { 99206f15ceeSFlorian Westphal int len, copylen; 99306f15ceeSFlorian Westphal 99406f15ceeSFlorian Westphal if (get_user(len, optlen)) 99506f15ceeSFlorian Westphal return -EFAULT; 99606f15ceeSFlorian Westphal 99706f15ceeSFlorian Westphal /* if mptcp_subflow_data size is changed, need to adjust 99806f15ceeSFlorian Westphal * this function to deal with programs using old version. 99906f15ceeSFlorian Westphal */ 100006f15ceeSFlorian Westphal BUILD_BUG_ON(sizeof(*sfd) != MIN_INFO_OPTLEN_SIZE); 100106f15ceeSFlorian Westphal 100206f15ceeSFlorian Westphal if (len < MIN_INFO_OPTLEN_SIZE) 100306f15ceeSFlorian Westphal return -EINVAL; 100406f15ceeSFlorian Westphal 100506f15ceeSFlorian Westphal memset(sfd, 0, sizeof(*sfd)); 100606f15ceeSFlorian Westphal 100706f15ceeSFlorian Westphal copylen = min_t(unsigned int, len, sizeof(*sfd)); 100806f15ceeSFlorian Westphal if (copy_from_user(sfd, optval, copylen)) 100906f15ceeSFlorian Westphal return -EFAULT; 101006f15ceeSFlorian Westphal 101106f15ceeSFlorian Westphal /* size_subflow_data is u32, but len is signed */ 101206f15ceeSFlorian Westphal if (sfd->size_subflow_data > INT_MAX || 101306f15ceeSFlorian Westphal sfd->size_user > INT_MAX) 101406f15ceeSFlorian Westphal return -EINVAL; 101506f15ceeSFlorian Westphal 101606f15ceeSFlorian Westphal if (sfd->size_subflow_data < MIN_INFO_OPTLEN_SIZE || 101706f15ceeSFlorian Westphal sfd->size_subflow_data > len) 101806f15ceeSFlorian Westphal return -EINVAL; 101906f15ceeSFlorian Westphal 102006f15ceeSFlorian Westphal if (sfd->num_subflows || sfd->size_kernel) 102106f15ceeSFlorian Westphal return -EINVAL; 102206f15ceeSFlorian Westphal 102306f15ceeSFlorian Westphal return len - sfd->size_subflow_data; 102406f15ceeSFlorian Westphal } 102506f15ceeSFlorian Westphal 102606f15ceeSFlorian Westphal static int mptcp_getsockopt_tcpinfo(struct mptcp_sock *msk, char __user *optval, 102706f15ceeSFlorian Westphal int __user *optlen) 102806f15ceeSFlorian Westphal { 102906f15ceeSFlorian Westphal struct mptcp_subflow_context *subflow; 103080638684SGeliang Tang struct sock *sk = (struct sock *)msk; 103106f15ceeSFlorian Westphal unsigned int sfcount = 0, copied = 0; 103206f15ceeSFlorian Westphal struct mptcp_subflow_data sfd; 103306f15ceeSFlorian Westphal char __user *infoptr; 103406f15ceeSFlorian Westphal int len; 103506f15ceeSFlorian Westphal 103606f15ceeSFlorian Westphal len = mptcp_get_subflow_data(&sfd, optval, optlen); 103706f15ceeSFlorian Westphal if (len < 0) 103806f15ceeSFlorian Westphal return len; 103906f15ceeSFlorian Westphal 104006f15ceeSFlorian Westphal sfd.size_kernel = sizeof(struct tcp_info); 104106f15ceeSFlorian Westphal sfd.size_user = min_t(unsigned int, sfd.size_user, 104206f15ceeSFlorian Westphal sizeof(struct tcp_info)); 104306f15ceeSFlorian Westphal 104406f15ceeSFlorian Westphal infoptr = optval + sfd.size_subflow_data; 104506f15ceeSFlorian Westphal 104606f15ceeSFlorian Westphal lock_sock(sk); 104706f15ceeSFlorian Westphal 104806f15ceeSFlorian Westphal mptcp_for_each_subflow(msk, subflow) { 104906f15ceeSFlorian Westphal struct sock *ssk = mptcp_subflow_tcp_sock(subflow); 105006f15ceeSFlorian Westphal 105106f15ceeSFlorian Westphal ++sfcount; 105206f15ceeSFlorian Westphal 105306f15ceeSFlorian Westphal if (len && len >= sfd.size_user) { 105406f15ceeSFlorian Westphal struct tcp_info info; 105506f15ceeSFlorian Westphal 105606f15ceeSFlorian Westphal tcp_get_info(ssk, &info); 105706f15ceeSFlorian Westphal 105806f15ceeSFlorian Westphal if (copy_to_user(infoptr, &info, sfd.size_user)) { 105906f15ceeSFlorian Westphal release_sock(sk); 106006f15ceeSFlorian Westphal return -EFAULT; 106106f15ceeSFlorian Westphal } 106206f15ceeSFlorian Westphal 106306f15ceeSFlorian Westphal infoptr += sfd.size_user; 106406f15ceeSFlorian Westphal copied += sfd.size_user; 106506f15ceeSFlorian Westphal len -= sfd.size_user; 106606f15ceeSFlorian Westphal } 106706f15ceeSFlorian Westphal } 106806f15ceeSFlorian Westphal 106906f15ceeSFlorian Westphal release_sock(sk); 107006f15ceeSFlorian Westphal 107106f15ceeSFlorian Westphal sfd.num_subflows = sfcount; 107206f15ceeSFlorian Westphal 107306f15ceeSFlorian Westphal if (mptcp_put_subflow_data(&sfd, optval, copied, optlen)) 107406f15ceeSFlorian Westphal return -EFAULT; 107506f15ceeSFlorian Westphal 107606f15ceeSFlorian Westphal return 0; 107706f15ceeSFlorian Westphal } 107806f15ceeSFlorian Westphal 1079c11c5906SFlorian Westphal static void mptcp_get_sub_addrs(const struct sock *sk, struct mptcp_subflow_addrs *a) 1080c11c5906SFlorian Westphal { 1081abc17a11SEric Dumazet const struct inet_sock *inet = inet_sk(sk); 1082c11c5906SFlorian Westphal 1083c11c5906SFlorian Westphal memset(a, 0, sizeof(*a)); 1084c11c5906SFlorian Westphal 1085c11c5906SFlorian Westphal if (sk->sk_family == AF_INET) { 1086c11c5906SFlorian Westphal a->sin_local.sin_family = AF_INET; 1087c11c5906SFlorian Westphal a->sin_local.sin_port = inet->inet_sport; 1088c11c5906SFlorian Westphal a->sin_local.sin_addr.s_addr = inet->inet_rcv_saddr; 1089c11c5906SFlorian Westphal 1090c11c5906SFlorian Westphal if (!a->sin_local.sin_addr.s_addr) 1091c11c5906SFlorian Westphal a->sin_local.sin_addr.s_addr = inet->inet_saddr; 1092c11c5906SFlorian Westphal 1093c11c5906SFlorian Westphal a->sin_remote.sin_family = AF_INET; 1094c11c5906SFlorian Westphal a->sin_remote.sin_port = inet->inet_dport; 1095c11c5906SFlorian Westphal a->sin_remote.sin_addr.s_addr = inet->inet_daddr; 1096c11c5906SFlorian Westphal #if IS_ENABLED(CONFIG_IPV6) 1097c11c5906SFlorian Westphal } else if (sk->sk_family == AF_INET6) { 1098c11c5906SFlorian Westphal const struct ipv6_pinfo *np = inet6_sk(sk); 1099c11c5906SFlorian Westphal 110029211e7dSTim Gardner if (WARN_ON_ONCE(!np)) 110129211e7dSTim Gardner return; 110229211e7dSTim Gardner 1103c11c5906SFlorian Westphal a->sin6_local.sin6_family = AF_INET6; 1104c11c5906SFlorian Westphal a->sin6_local.sin6_port = inet->inet_sport; 1105c11c5906SFlorian Westphal 1106c11c5906SFlorian Westphal if (ipv6_addr_any(&sk->sk_v6_rcv_saddr)) 1107c11c5906SFlorian Westphal a->sin6_local.sin6_addr = np->saddr; 1108c11c5906SFlorian Westphal else 1109c11c5906SFlorian Westphal a->sin6_local.sin6_addr = sk->sk_v6_rcv_saddr; 1110c11c5906SFlorian Westphal 1111c11c5906SFlorian Westphal a->sin6_remote.sin6_family = AF_INET6; 1112c11c5906SFlorian Westphal a->sin6_remote.sin6_port = inet->inet_dport; 1113c11c5906SFlorian Westphal a->sin6_remote.sin6_addr = sk->sk_v6_daddr; 1114c11c5906SFlorian Westphal #endif 1115c11c5906SFlorian Westphal } 1116c11c5906SFlorian Westphal } 1117c11c5906SFlorian Westphal 1118c11c5906SFlorian Westphal static int mptcp_getsockopt_subflow_addrs(struct mptcp_sock *msk, char __user *optval, 1119c11c5906SFlorian Westphal int __user *optlen) 1120c11c5906SFlorian Westphal { 1121c11c5906SFlorian Westphal struct mptcp_subflow_context *subflow; 112280638684SGeliang Tang struct sock *sk = (struct sock *)msk; 1123c11c5906SFlorian Westphal unsigned int sfcount = 0, copied = 0; 1124c11c5906SFlorian Westphal struct mptcp_subflow_data sfd; 1125c11c5906SFlorian Westphal char __user *addrptr; 1126c11c5906SFlorian Westphal int len; 1127c11c5906SFlorian Westphal 1128c11c5906SFlorian Westphal len = mptcp_get_subflow_data(&sfd, optval, optlen); 1129c11c5906SFlorian Westphal if (len < 0) 1130c11c5906SFlorian Westphal return len; 1131c11c5906SFlorian Westphal 1132c11c5906SFlorian Westphal sfd.size_kernel = sizeof(struct mptcp_subflow_addrs); 1133c11c5906SFlorian Westphal sfd.size_user = min_t(unsigned int, sfd.size_user, 1134c11c5906SFlorian Westphal sizeof(struct mptcp_subflow_addrs)); 1135c11c5906SFlorian Westphal 1136c11c5906SFlorian Westphal addrptr = optval + sfd.size_subflow_data; 1137c11c5906SFlorian Westphal 1138c11c5906SFlorian Westphal lock_sock(sk); 1139c11c5906SFlorian Westphal 1140c11c5906SFlorian Westphal mptcp_for_each_subflow(msk, subflow) { 1141c11c5906SFlorian Westphal struct sock *ssk = mptcp_subflow_tcp_sock(subflow); 1142c11c5906SFlorian Westphal 1143c11c5906SFlorian Westphal ++sfcount; 1144c11c5906SFlorian Westphal 1145c11c5906SFlorian Westphal if (len && len >= sfd.size_user) { 1146c11c5906SFlorian Westphal struct mptcp_subflow_addrs a; 1147c11c5906SFlorian Westphal 1148c11c5906SFlorian Westphal mptcp_get_sub_addrs(ssk, &a); 1149c11c5906SFlorian Westphal 1150c11c5906SFlorian Westphal if (copy_to_user(addrptr, &a, sfd.size_user)) { 1151c11c5906SFlorian Westphal release_sock(sk); 1152c11c5906SFlorian Westphal return -EFAULT; 1153c11c5906SFlorian Westphal } 1154c11c5906SFlorian Westphal 1155c11c5906SFlorian Westphal addrptr += sfd.size_user; 1156c11c5906SFlorian Westphal copied += sfd.size_user; 1157c11c5906SFlorian Westphal len -= sfd.size_user; 1158c11c5906SFlorian Westphal } 1159c11c5906SFlorian Westphal } 1160c11c5906SFlorian Westphal 1161c11c5906SFlorian Westphal release_sock(sk); 1162c11c5906SFlorian Westphal 1163c11c5906SFlorian Westphal sfd.num_subflows = sfcount; 1164c11c5906SFlorian Westphal 1165c11c5906SFlorian Westphal if (mptcp_put_subflow_data(&sfd, optval, copied, optlen)) 1166c11c5906SFlorian Westphal return -EFAULT; 1167c11c5906SFlorian Westphal 1168c11c5906SFlorian Westphal return 0; 1169c11c5906SFlorian Westphal } 1170c11c5906SFlorian Westphal 117149243207SPaolo Abeni static int mptcp_get_full_info(struct mptcp_full_info *mfi, 117249243207SPaolo Abeni char __user *optval, 117349243207SPaolo Abeni int __user *optlen) 117449243207SPaolo Abeni { 117549243207SPaolo Abeni int len; 117649243207SPaolo Abeni 117749243207SPaolo Abeni BUILD_BUG_ON(offsetof(struct mptcp_full_info, mptcp_info) != 117849243207SPaolo Abeni MIN_FULL_INFO_OPTLEN_SIZE); 117949243207SPaolo Abeni 118049243207SPaolo Abeni if (get_user(len, optlen)) 118149243207SPaolo Abeni return -EFAULT; 118249243207SPaolo Abeni 118349243207SPaolo Abeni if (len < MIN_FULL_INFO_OPTLEN_SIZE) 118449243207SPaolo Abeni return -EINVAL; 118549243207SPaolo Abeni 118649243207SPaolo Abeni memset(mfi, 0, sizeof(*mfi)); 118749243207SPaolo Abeni if (copy_from_user(mfi, optval, MIN_FULL_INFO_OPTLEN_SIZE)) 118849243207SPaolo Abeni return -EFAULT; 118949243207SPaolo Abeni 119049243207SPaolo Abeni if (mfi->size_tcpinfo_kernel || 119149243207SPaolo Abeni mfi->size_sfinfo_kernel || 119249243207SPaolo Abeni mfi->num_subflows) 119349243207SPaolo Abeni return -EINVAL; 119449243207SPaolo Abeni 119549243207SPaolo Abeni if (mfi->size_sfinfo_user > INT_MAX || 119649243207SPaolo Abeni mfi->size_tcpinfo_user > INT_MAX) 119749243207SPaolo Abeni return -EINVAL; 119849243207SPaolo Abeni 119949243207SPaolo Abeni return len - MIN_FULL_INFO_OPTLEN_SIZE; 120049243207SPaolo Abeni } 120149243207SPaolo Abeni 120249243207SPaolo Abeni static int mptcp_put_full_info(struct mptcp_full_info *mfi, 120349243207SPaolo Abeni char __user *optval, 120449243207SPaolo Abeni u32 copylen, 120549243207SPaolo Abeni int __user *optlen) 120649243207SPaolo Abeni { 120749243207SPaolo Abeni copylen += MIN_FULL_INFO_OPTLEN_SIZE; 120849243207SPaolo Abeni if (put_user(copylen, optlen)) 120949243207SPaolo Abeni return -EFAULT; 121049243207SPaolo Abeni 121149243207SPaolo Abeni if (copy_to_user(optval, mfi, copylen)) 121249243207SPaolo Abeni return -EFAULT; 121349243207SPaolo Abeni return 0; 121449243207SPaolo Abeni } 121549243207SPaolo Abeni 121649243207SPaolo Abeni static int mptcp_getsockopt_full_info(struct mptcp_sock *msk, char __user *optval, 121749243207SPaolo Abeni int __user *optlen) 121849243207SPaolo Abeni { 121949243207SPaolo Abeni unsigned int sfcount = 0, copylen = 0; 122049243207SPaolo Abeni struct mptcp_subflow_context *subflow; 122149243207SPaolo Abeni struct sock *sk = (struct sock *)msk; 122249243207SPaolo Abeni void __user *tcpinfoptr, *sfinfoptr; 122349243207SPaolo Abeni struct mptcp_full_info mfi; 122449243207SPaolo Abeni int len; 122549243207SPaolo Abeni 122649243207SPaolo Abeni len = mptcp_get_full_info(&mfi, optval, optlen); 122749243207SPaolo Abeni if (len < 0) 122849243207SPaolo Abeni return len; 122949243207SPaolo Abeni 123049243207SPaolo Abeni /* don't bother filling the mptcp info if there is not enough 123149243207SPaolo Abeni * user-space-provided storage 123249243207SPaolo Abeni */ 123349243207SPaolo Abeni if (len > 0) { 123449243207SPaolo Abeni mptcp_diag_fill_info(msk, &mfi.mptcp_info); 123549243207SPaolo Abeni copylen += min_t(unsigned int, len, sizeof(struct mptcp_info)); 123649243207SPaolo Abeni } 123749243207SPaolo Abeni 123849243207SPaolo Abeni mfi.size_tcpinfo_kernel = sizeof(struct tcp_info); 123949243207SPaolo Abeni mfi.size_tcpinfo_user = min_t(unsigned int, mfi.size_tcpinfo_user, 124049243207SPaolo Abeni sizeof(struct tcp_info)); 124149243207SPaolo Abeni sfinfoptr = u64_to_user_ptr(mfi.subflow_info); 124249243207SPaolo Abeni mfi.size_sfinfo_kernel = sizeof(struct mptcp_subflow_info); 124349243207SPaolo Abeni mfi.size_sfinfo_user = min_t(unsigned int, mfi.size_sfinfo_user, 124449243207SPaolo Abeni sizeof(struct mptcp_subflow_info)); 124549243207SPaolo Abeni tcpinfoptr = u64_to_user_ptr(mfi.tcp_info); 124649243207SPaolo Abeni 124749243207SPaolo Abeni lock_sock(sk); 124849243207SPaolo Abeni mptcp_for_each_subflow(msk, subflow) { 124949243207SPaolo Abeni struct sock *ssk = mptcp_subflow_tcp_sock(subflow); 125049243207SPaolo Abeni struct mptcp_subflow_info sfinfo; 125149243207SPaolo Abeni struct tcp_info tcp_info; 125249243207SPaolo Abeni 125349243207SPaolo Abeni if (sfcount++ >= mfi.size_arrays_user) 125449243207SPaolo Abeni continue; 125549243207SPaolo Abeni 125649243207SPaolo Abeni /* fetch addr/tcp_info only if the user space buffers 125749243207SPaolo Abeni * are wide enough 125849243207SPaolo Abeni */ 125949243207SPaolo Abeni memset(&sfinfo, 0, sizeof(sfinfo)); 126049243207SPaolo Abeni sfinfo.id = subflow->subflow_id; 126149243207SPaolo Abeni if (mfi.size_sfinfo_user > 126249243207SPaolo Abeni offsetof(struct mptcp_subflow_info, addrs)) 126349243207SPaolo Abeni mptcp_get_sub_addrs(ssk, &sfinfo.addrs); 126449243207SPaolo Abeni if (copy_to_user(sfinfoptr, &sfinfo, mfi.size_sfinfo_user)) 126549243207SPaolo Abeni goto fail_release; 126649243207SPaolo Abeni 126749243207SPaolo Abeni if (mfi.size_tcpinfo_user) { 126849243207SPaolo Abeni tcp_get_info(ssk, &tcp_info); 126949243207SPaolo Abeni if (copy_to_user(tcpinfoptr, &tcp_info, 127049243207SPaolo Abeni mfi.size_tcpinfo_user)) 127149243207SPaolo Abeni goto fail_release; 127249243207SPaolo Abeni } 127349243207SPaolo Abeni 127449243207SPaolo Abeni tcpinfoptr += mfi.size_tcpinfo_user; 127549243207SPaolo Abeni sfinfoptr += mfi.size_sfinfo_user; 127649243207SPaolo Abeni } 127749243207SPaolo Abeni release_sock(sk); 127849243207SPaolo Abeni 127949243207SPaolo Abeni mfi.num_subflows = sfcount; 128049243207SPaolo Abeni if (mptcp_put_full_info(&mfi, optval, copylen, optlen)) 128149243207SPaolo Abeni return -EFAULT; 128249243207SPaolo Abeni 128349243207SPaolo Abeni return 0; 128449243207SPaolo Abeni 128549243207SPaolo Abeni fail_release: 128649243207SPaolo Abeni release_sock(sk); 128749243207SPaolo Abeni return -EFAULT; 128849243207SPaolo Abeni } 128949243207SPaolo Abeni 12902c9e7765SFlorian Westphal static int mptcp_put_int_option(struct mptcp_sock *msk, char __user *optval, 12912c9e7765SFlorian Westphal int __user *optlen, int val) 12922c9e7765SFlorian Westphal { 12932c9e7765SFlorian Westphal int len; 12942c9e7765SFlorian Westphal 12952c9e7765SFlorian Westphal if (get_user(len, optlen)) 12962c9e7765SFlorian Westphal return -EFAULT; 12972c9e7765SFlorian Westphal if (len < 0) 12982c9e7765SFlorian Westphal return -EINVAL; 12992c9e7765SFlorian Westphal 13003b1e21ebSFlorian Westphal if (len < sizeof(int) && len > 0 && val >= 0 && val <= 255) { 13013b1e21ebSFlorian Westphal unsigned char ucval = (unsigned char)val; 13023b1e21ebSFlorian Westphal 13033b1e21ebSFlorian Westphal len = 1; 13043b1e21ebSFlorian Westphal if (put_user(len, optlen)) 13053b1e21ebSFlorian Westphal return -EFAULT; 13063b1e21ebSFlorian Westphal if (copy_to_user(optval, &ucval, 1)) 13073b1e21ebSFlorian Westphal return -EFAULT; 13083b1e21ebSFlorian Westphal } else { 13093b1e21ebSFlorian Westphal len = min_t(unsigned int, len, sizeof(int)); 13102c9e7765SFlorian Westphal if (put_user(len, optlen)) 13112c9e7765SFlorian Westphal return -EFAULT; 13122c9e7765SFlorian Westphal if (copy_to_user(optval, &val, len)) 13132c9e7765SFlorian Westphal return -EFAULT; 13143b1e21ebSFlorian Westphal } 13152c9e7765SFlorian Westphal 13162c9e7765SFlorian Westphal return 0; 13172c9e7765SFlorian Westphal } 13182c9e7765SFlorian Westphal 1319aa1fbd94SFlorian Westphal static int mptcp_getsockopt_sol_tcp(struct mptcp_sock *msk, int optname, 1320aa1fbd94SFlorian Westphal char __user *optval, int __user *optlen) 1321aa1fbd94SFlorian Westphal { 1322aa1fbd94SFlorian Westphal switch (optname) { 1323aa1fbd94SFlorian Westphal case TCP_ULP: 1324aa1fbd94SFlorian Westphal case TCP_CONGESTION: 1325aa1fbd94SFlorian Westphal case TCP_INFO: 1326aa1fbd94SFlorian Westphal case TCP_CC_INFO: 1327ea1e301dSFlorian Westphal case TCP_DEFER_ACCEPT: 13284ffb0a02SDmytro Shytyi case TCP_FASTOPEN: 132954635bd0SBenjamin Hesmans case TCP_FASTOPEN_CONNECT: 1330cb99816cSMatthieu Baerts case TCP_FASTOPEN_KEY: 1331e64d4debSMatthieu Baerts case TCP_FASTOPEN_NO_COOKIE: 1332aa1fbd94SFlorian Westphal return mptcp_getsockopt_first_sf_only(msk, SOL_TCP, optname, 1333aa1fbd94SFlorian Westphal optval, optlen); 13342c9e7765SFlorian Westphal case TCP_INQ: 13352c9e7765SFlorian Westphal return mptcp_put_int_option(msk, optval, optlen, msk->recvmsg_inq); 13364f6e14bdSMaxim Galaganov case TCP_CORK: 13374f6e14bdSMaxim Galaganov return mptcp_put_int_option(msk, optval, optlen, msk->cork); 13384f6e14bdSMaxim Galaganov case TCP_NODELAY: 13394f6e14bdSMaxim Galaganov return mptcp_put_int_option(msk, optval, optlen, msk->nodelay); 1340aa1fbd94SFlorian Westphal } 13410abdde82SPaolo Abeni return -EOPNOTSUPP; 13420abdde82SPaolo Abeni } 13430abdde82SPaolo Abeni 13443b1e21ebSFlorian Westphal static int mptcp_getsockopt_v4(struct mptcp_sock *msk, int optname, 13453b1e21ebSFlorian Westphal char __user *optval, int __user *optlen) 13463b1e21ebSFlorian Westphal { 13473b1e21ebSFlorian Westphal struct sock *sk = (void *)msk; 13483b1e21ebSFlorian Westphal 13493b1e21ebSFlorian Westphal switch (optname) { 13503b1e21ebSFlorian Westphal case IP_TOS: 13513b1e21ebSFlorian Westphal return mptcp_put_int_option(msk, optval, optlen, inet_sk(sk)->tos); 13523b1e21ebSFlorian Westphal } 13533b1e21ebSFlorian Westphal 13543b1e21ebSFlorian Westphal return -EOPNOTSUPP; 13553b1e21ebSFlorian Westphal } 13563b1e21ebSFlorian Westphal 135755c42fa7SFlorian Westphal static int mptcp_getsockopt_sol_mptcp(struct mptcp_sock *msk, int optname, 135855c42fa7SFlorian Westphal char __user *optval, int __user *optlen) 135955c42fa7SFlorian Westphal { 136055c42fa7SFlorian Westphal switch (optname) { 136155c42fa7SFlorian Westphal case MPTCP_INFO: 136255c42fa7SFlorian Westphal return mptcp_getsockopt_info(msk, optval, optlen); 136349243207SPaolo Abeni case MPTCP_FULL_INFO: 136449243207SPaolo Abeni return mptcp_getsockopt_full_info(msk, optval, optlen); 136506f15ceeSFlorian Westphal case MPTCP_TCPINFO: 136606f15ceeSFlorian Westphal return mptcp_getsockopt_tcpinfo(msk, optval, optlen); 1367c11c5906SFlorian Westphal case MPTCP_SUBFLOW_ADDRS: 1368c11c5906SFlorian Westphal return mptcp_getsockopt_subflow_addrs(msk, optval, optlen); 136955c42fa7SFlorian Westphal } 137055c42fa7SFlorian Westphal 137155c42fa7SFlorian Westphal return -EOPNOTSUPP; 137255c42fa7SFlorian Westphal } 137355c42fa7SFlorian Westphal 13740abdde82SPaolo Abeni int mptcp_getsockopt(struct sock *sk, int level, int optname, 13750abdde82SPaolo Abeni char __user *optval, int __user *option) 13760abdde82SPaolo Abeni { 13770abdde82SPaolo Abeni struct mptcp_sock *msk = mptcp_sk(sk); 13780abdde82SPaolo Abeni struct sock *ssk; 13790abdde82SPaolo Abeni 13800abdde82SPaolo Abeni pr_debug("msk=%p", msk); 13810abdde82SPaolo Abeni 13820abdde82SPaolo Abeni /* @@ the meaning of setsockopt() when the socket is connected and 13830abdde82SPaolo Abeni * there are multiple subflows is not yet defined. It is up to the 13840abdde82SPaolo Abeni * MPTCP-level socket to configure the subflows until the subflow 13850abdde82SPaolo Abeni * is in TCP fallback, when socket options are passed through 13860abdde82SPaolo Abeni * to the one remaining subflow. 13870abdde82SPaolo Abeni */ 13880abdde82SPaolo Abeni lock_sock(sk); 13890abdde82SPaolo Abeni ssk = __mptcp_tcp_fallback(msk); 13900abdde82SPaolo Abeni release_sock(sk); 13910abdde82SPaolo Abeni if (ssk) 13920abdde82SPaolo Abeni return tcp_getsockopt(ssk, level, optname, optval, option); 13930abdde82SPaolo Abeni 13943b1e21ebSFlorian Westphal if (level == SOL_IP) 13953b1e21ebSFlorian Westphal return mptcp_getsockopt_v4(msk, optname, optval, option); 1396aa1fbd94SFlorian Westphal if (level == SOL_TCP) 1397aa1fbd94SFlorian Westphal return mptcp_getsockopt_sol_tcp(msk, optname, optval, option); 139855c42fa7SFlorian Westphal if (level == SOL_MPTCP) 139955c42fa7SFlorian Westphal return mptcp_getsockopt_sol_mptcp(msk, optname, optval, option); 14000abdde82SPaolo Abeni return -EOPNOTSUPP; 14010abdde82SPaolo Abeni } 14020abdde82SPaolo Abeni 14031b3e7edeSFlorian Westphal static void sync_socket_options(struct mptcp_sock *msk, struct sock *ssk) 14041b3e7edeSFlorian Westphal { 14055d0a6bc8SFlorian Westphal static const unsigned int tx_rx_locks = SOCK_RCVBUF_LOCK | SOCK_SNDBUF_LOCK; 14061b3e7edeSFlorian Westphal struct sock *sk = (struct sock *)msk; 14071b3e7edeSFlorian Westphal 14081b3e7edeSFlorian Westphal if (ssk->sk_prot->keepalive) { 14091b3e7edeSFlorian Westphal if (sock_flag(sk, SOCK_KEEPOPEN)) 14101b3e7edeSFlorian Westphal ssk->sk_prot->keepalive(ssk, 1); 14111b3e7edeSFlorian Westphal else 14121b3e7edeSFlorian Westphal ssk->sk_prot->keepalive(ssk, 0); 14131b3e7edeSFlorian Westphal } 14141b3e7edeSFlorian Westphal 14151b3e7edeSFlorian Westphal ssk->sk_priority = sk->sk_priority; 14165d0a6bc8SFlorian Westphal ssk->sk_bound_dev_if = sk->sk_bound_dev_if; 14175d0a6bc8SFlorian Westphal ssk->sk_incoming_cpu = sk->sk_incoming_cpu; 14187e9740e0SMatthieu Baerts ssk->sk_ipv6only = sk->sk_ipv6only; 1419ffcacff8SPoorva Sonparote __ip_sock_set_tos(ssk, inet_sk(sk)->tos); 14205d0a6bc8SFlorian Westphal 14215d0a6bc8SFlorian Westphal if (sk->sk_userlocks & tx_rx_locks) { 14225d0a6bc8SFlorian Westphal ssk->sk_userlocks |= sk->sk_userlocks & tx_rx_locks; 14235d0a6bc8SFlorian Westphal if (sk->sk_userlocks & SOCK_SNDBUF_LOCK) 14245d0a6bc8SFlorian Westphal WRITE_ONCE(ssk->sk_sndbuf, sk->sk_sndbuf); 14255d0a6bc8SFlorian Westphal if (sk->sk_userlocks & SOCK_RCVBUF_LOCK) 14265d0a6bc8SFlorian Westphal WRITE_ONCE(ssk->sk_rcvbuf, sk->sk_rcvbuf); 14275d0a6bc8SFlorian Westphal } 14285d0a6bc8SFlorian Westphal 14295d0a6bc8SFlorian Westphal if (sock_flag(sk, SOCK_LINGER)) { 14305d0a6bc8SFlorian Westphal ssk->sk_lingertime = sk->sk_lingertime; 14315d0a6bc8SFlorian Westphal sock_set_flag(ssk, SOCK_LINGER); 14325d0a6bc8SFlorian Westphal } else { 14335d0a6bc8SFlorian Westphal sock_reset_flag(ssk, SOCK_LINGER); 14345d0a6bc8SFlorian Westphal } 14355d0a6bc8SFlorian Westphal 14365d0a6bc8SFlorian Westphal if (sk->sk_mark != ssk->sk_mark) { 14375d0a6bc8SFlorian Westphal ssk->sk_mark = sk->sk_mark; 14385d0a6bc8SFlorian Westphal sk_dst_reset(ssk); 14395d0a6bc8SFlorian Westphal } 14405d0a6bc8SFlorian Westphal 14415d0a6bc8SFlorian Westphal sock_valbool_flag(ssk, SOCK_DBG, sock_flag(sk, SOCK_DBG)); 14425d0a6bc8SFlorian Westphal 14435d0a6bc8SFlorian Westphal if (inet_csk(sk)->icsk_ca_ops != inet_csk(ssk)->icsk_ca_ops) 144420b5759fSPaolo Abeni tcp_set_congestion_control(ssk, msk->ca_name, false, true); 14454f6e14bdSMaxim Galaganov __tcp_sock_set_cork(ssk, !!msk->cork); 14464f6e14bdSMaxim Galaganov __tcp_sock_set_nodelay(ssk, !!msk->nodelay); 1447c9406a23SFlorian Westphal 1448c9406a23SFlorian Westphal inet_sk(ssk)->transparent = inet_sk(sk)->transparent; 1449c9406a23SFlorian Westphal inet_sk(ssk)->freebind = inet_sk(sk)->freebind; 14501b3e7edeSFlorian Westphal } 14511b3e7edeSFlorian Westphal 1452df00b087SFlorian Westphal static void __mptcp_sockopt_sync(struct mptcp_sock *msk, struct sock *ssk) 1453df00b087SFlorian Westphal { 14541b3e7edeSFlorian Westphal bool slow = lock_sock_fast(ssk); 14551b3e7edeSFlorian Westphal 14561b3e7edeSFlorian Westphal sync_socket_options(msk, ssk); 14571b3e7edeSFlorian Westphal 14581b3e7edeSFlorian Westphal unlock_sock_fast(ssk, slow); 1459df00b087SFlorian Westphal } 1460df00b087SFlorian Westphal 146178962489SFlorian Westphal void mptcp_sockopt_sync(struct mptcp_sock *msk, struct sock *ssk) 146278962489SFlorian Westphal { 1463df00b087SFlorian Westphal struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(ssk); 1464df00b087SFlorian Westphal 146578962489SFlorian Westphal msk_owned_by_me(msk); 1466df00b087SFlorian Westphal 1467df00b087SFlorian Westphal if (READ_ONCE(subflow->setsockopt_seq) != msk->setsockopt_seq) { 1468df00b087SFlorian Westphal __mptcp_sockopt_sync(msk, ssk); 1469df00b087SFlorian Westphal 1470df00b087SFlorian Westphal subflow->setsockopt_seq = msk->setsockopt_seq; 1471df00b087SFlorian Westphal } 147278962489SFlorian Westphal } 147378962489SFlorian Westphal 14743e501490SPaolo Abeni void mptcp_sockopt_sync_locked(struct mptcp_sock *msk, struct sock *ssk) 147578962489SFlorian Westphal { 14763e501490SPaolo Abeni struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(ssk); 147778962489SFlorian Westphal 14783e501490SPaolo Abeni msk_owned_by_me(msk); 147978962489SFlorian Westphal 14803e501490SPaolo Abeni if (READ_ONCE(subflow->setsockopt_seq) != msk->setsockopt_seq) { 14813e501490SPaolo Abeni sync_socket_options(msk, ssk); 148278962489SFlorian Westphal 14833e501490SPaolo Abeni subflow->setsockopt_seq = msk->setsockopt_seq; 1484df00b087SFlorian Westphal } 148578962489SFlorian Westphal } 1486