11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * INET An implementation of the TCP/IP protocol suite for the LINUX 31da177e4SLinus Torvalds * operating system. INET is implemented using the BSD Socket 41da177e4SLinus Torvalds * interface as the means of communication with the user level. 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * PF_INET protocol family socket handler. 71da177e4SLinus Torvalds * 802c30a84SJesper Juhl * Authors: Ross Biro 91da177e4SLinus Torvalds * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> 101da177e4SLinus Torvalds * Florian La Roche, <flla@stud.uni-sb.de> 111da177e4SLinus Torvalds * Alan Cox, <A.Cox@swansea.ac.uk> 121da177e4SLinus Torvalds * 131da177e4SLinus Torvalds * Changes (see also sock.c) 141da177e4SLinus Torvalds * 151da177e4SLinus Torvalds * piggy, 161da177e4SLinus Torvalds * Karl Knutson : Socket protocol table 171da177e4SLinus Torvalds * A.N.Kuznetsov : Socket death error in accept(). 181da177e4SLinus Torvalds * John Richardson : Fix non blocking error in connect() 191da177e4SLinus Torvalds * so sockets that fail to connect 201da177e4SLinus Torvalds * don't return -EINPROGRESS. 211da177e4SLinus Torvalds * Alan Cox : Asynchronous I/O support 221da177e4SLinus Torvalds * Alan Cox : Keep correct socket pointer on sock 231da177e4SLinus Torvalds * structures 241da177e4SLinus Torvalds * when accept() ed 251da177e4SLinus Torvalds * Alan Cox : Semantics of SO_LINGER aren't state 261da177e4SLinus Torvalds * moved to close when you look carefully. 271da177e4SLinus Torvalds * With this fixed and the accept bug fixed 281da177e4SLinus Torvalds * some RPC stuff seems happier. 291da177e4SLinus Torvalds * Niibe Yutaka : 4.4BSD style write async I/O 301da177e4SLinus Torvalds * Alan Cox, 311da177e4SLinus Torvalds * Tony Gale : Fixed reuse semantics. 321da177e4SLinus Torvalds * Alan Cox : bind() shouldn't abort existing but dead 331da177e4SLinus Torvalds * sockets. Stops FTP netin:.. I hope. 341da177e4SLinus Torvalds * Alan Cox : bind() works correctly for RAW sockets. 351da177e4SLinus Torvalds * Note that FreeBSD at least was broken 361da177e4SLinus Torvalds * in this respect so be careful with 371da177e4SLinus Torvalds * compatibility tests... 381da177e4SLinus Torvalds * Alan Cox : routing cache support 391da177e4SLinus Torvalds * Alan Cox : memzero the socket structure for 401da177e4SLinus Torvalds * compactness. 411da177e4SLinus Torvalds * Matt Day : nonblock connect error handler 421da177e4SLinus Torvalds * Alan Cox : Allow large numbers of pending sockets 431da177e4SLinus Torvalds * (eg for big web sites), but only if 441da177e4SLinus Torvalds * specifically application requested. 451da177e4SLinus Torvalds * Alan Cox : New buffering throughout IP. Used 461da177e4SLinus Torvalds * dumbly. 471da177e4SLinus Torvalds * Alan Cox : New buffering now used smartly. 481da177e4SLinus Torvalds * Alan Cox : BSD rather than common sense 491da177e4SLinus Torvalds * interpretation of listen. 501da177e4SLinus Torvalds * Germano Caronni : Assorted small races. 511da177e4SLinus Torvalds * Alan Cox : sendmsg/recvmsg basic support. 521da177e4SLinus Torvalds * Alan Cox : Only sendmsg/recvmsg now supported. 531da177e4SLinus Torvalds * Alan Cox : Locked down bind (see security list). 541da177e4SLinus Torvalds * Alan Cox : Loosened bind a little. 551da177e4SLinus Torvalds * Mike McLagan : ADD/DEL DLCI Ioctls 561da177e4SLinus Torvalds * Willy Konynenberg : Transparent proxying support. 571da177e4SLinus Torvalds * David S. Miller : New socket lookup architecture. 581da177e4SLinus Torvalds * Some other random speedups. 591da177e4SLinus Torvalds * Cyrus Durgin : Cleaned up file for kmod hacks. 601da177e4SLinus Torvalds * Andi Kleen : Fix inet_stream_connect TCP race. 611da177e4SLinus Torvalds * 621da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or 631da177e4SLinus Torvalds * modify it under the terms of the GNU General Public License 641da177e4SLinus Torvalds * as published by the Free Software Foundation; either version 651da177e4SLinus Torvalds * 2 of the License, or (at your option) any later version. 661da177e4SLinus Torvalds */ 671da177e4SLinus Torvalds 68afd46503SJoe Perches #define pr_fmt(fmt) "IPv4: " fmt 69afd46503SJoe Perches 70f4c50d99SHerbert Xu #include <linux/err.h> 711da177e4SLinus Torvalds #include <linux/errno.h> 721da177e4SLinus Torvalds #include <linux/types.h> 731da177e4SLinus Torvalds #include <linux/socket.h> 741da177e4SLinus Torvalds #include <linux/in.h> 751da177e4SLinus Torvalds #include <linux/kernel.h> 761da177e4SLinus Torvalds #include <linux/module.h> 771da177e4SLinus Torvalds #include <linux/sched.h> 781da177e4SLinus Torvalds #include <linux/timer.h> 791da177e4SLinus Torvalds #include <linux/string.h> 801da177e4SLinus Torvalds #include <linux/sockios.h> 811da177e4SLinus Torvalds #include <linux/net.h> 824fc268d2SRandy Dunlap #include <linux/capability.h> 831da177e4SLinus Torvalds #include <linux/fcntl.h> 841da177e4SLinus Torvalds #include <linux/mm.h> 851da177e4SLinus Torvalds #include <linux/interrupt.h> 861da177e4SLinus Torvalds #include <linux/stat.h> 871da177e4SLinus Torvalds #include <linux/init.h> 881da177e4SLinus Torvalds #include <linux/poll.h> 891da177e4SLinus Torvalds #include <linux/netfilter_ipv4.h> 90b3da2cf3SDavid S. Miller #include <linux/random.h> 915a0e3ad6STejun Heo #include <linux/slab.h> 921da177e4SLinus Torvalds 931da177e4SLinus Torvalds #include <asm/uaccess.h> 941da177e4SLinus Torvalds 951da177e4SLinus Torvalds #include <linux/inet.h> 961da177e4SLinus Torvalds #include <linux/igmp.h> 9714c85021SArnaldo Carvalho de Melo #include <linux/inetdevice.h> 981da177e4SLinus Torvalds #include <linux/netdevice.h> 9973cc19f1SHerbert Xu #include <net/checksum.h> 1001da177e4SLinus Torvalds #include <net/ip.h> 1011da177e4SLinus Torvalds #include <net/protocol.h> 1021da177e4SLinus Torvalds #include <net/arp.h> 1031da177e4SLinus Torvalds #include <net/route.h> 1041da177e4SLinus Torvalds #include <net/ip_fib.h> 105295f7324SArnaldo Carvalho de Melo #include <net/inet_connection_sock.h> 1061da177e4SLinus Torvalds #include <net/tcp.h> 1071da177e4SLinus Torvalds #include <net/udp.h> 108ba4e58ecSGerrit Renker #include <net/udplite.h> 109c319b4d7SVasiliy Kulikov #include <net/ping.h> 1101da177e4SLinus Torvalds #include <linux/skbuff.h> 1111da177e4SLinus Torvalds #include <net/sock.h> 1121da177e4SLinus Torvalds #include <net/raw.h> 1131da177e4SLinus Torvalds #include <net/icmp.h> 1141da177e4SLinus Torvalds #include <net/inet_common.h> 1151da177e4SLinus Torvalds #include <net/xfrm.h> 1169b4661bdSPavel Emelyanov #include <net/net_namespace.h> 117aebda156SEric Dumazet #include <net/secure_seq.h> 1181da177e4SLinus Torvalds #ifdef CONFIG_IP_MROUTE 1191da177e4SLinus Torvalds #include <linux/mroute.h> 1201da177e4SLinus Torvalds #endif 1211da177e4SLinus Torvalds 1221da177e4SLinus Torvalds 1231da177e4SLinus Torvalds /* The inetsw table contains everything that inet_create needs to 1241da177e4SLinus Torvalds * build a new socket. 1251da177e4SLinus Torvalds */ 1261da177e4SLinus Torvalds static struct list_head inetsw[SOCK_MAX]; 1271da177e4SLinus Torvalds static DEFINE_SPINLOCK(inetsw_lock); 1281da177e4SLinus Torvalds 1291da177e4SLinus Torvalds /* New destruction routine */ 1301da177e4SLinus Torvalds 1311da177e4SLinus Torvalds void inet_sock_destruct(struct sock *sk) 1321da177e4SLinus Torvalds { 1331da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 1341da177e4SLinus Torvalds 1351da177e4SLinus Torvalds __skb_queue_purge(&sk->sk_receive_queue); 1361da177e4SLinus Torvalds __skb_queue_purge(&sk->sk_error_queue); 1371da177e4SLinus Torvalds 13895766fffSHideo Aoki sk_mem_reclaim(sk); 13995766fffSHideo Aoki 1401da177e4SLinus Torvalds if (sk->sk_type == SOCK_STREAM && sk->sk_state != TCP_CLOSE) { 1413d1427f8SEric Dumazet pr_err("Attempt to release TCP socket in state %d %p\n", 1421da177e4SLinus Torvalds sk->sk_state, sk); 1431da177e4SLinus Torvalds return; 1441da177e4SLinus Torvalds } 1451da177e4SLinus Torvalds if (!sock_flag(sk, SOCK_DEAD)) { 1463d1427f8SEric Dumazet pr_err("Attempt to release alive inet socket %p\n", sk); 1471da177e4SLinus Torvalds return; 1481da177e4SLinus Torvalds } 1491da177e4SLinus Torvalds 150547b792cSIlpo Järvinen WARN_ON(atomic_read(&sk->sk_rmem_alloc)); 151547b792cSIlpo Järvinen WARN_ON(atomic_read(&sk->sk_wmem_alloc)); 152547b792cSIlpo Järvinen WARN_ON(sk->sk_wmem_queued); 153547b792cSIlpo Järvinen WARN_ON(sk->sk_forward_alloc); 1541da177e4SLinus Torvalds 155f6d8bd05SEric Dumazet kfree(rcu_dereference_protected(inet->inet_opt, 1)); 156b6c6712aSEric Dumazet dst_release(rcu_dereference_check(sk->sk_dst_cache, 1)); 15741063e9dSDavid S. Miller dst_release(sk->sk_rx_dst); 158e6848976SArnaldo Carvalho de Melo sk_refcnt_debug_dec(sk); 1591da177e4SLinus Torvalds } 1603d1427f8SEric Dumazet EXPORT_SYMBOL(inet_sock_destruct); 1611da177e4SLinus Torvalds 1621da177e4SLinus Torvalds /* 1631da177e4SLinus Torvalds * The routines beyond this point handle the behaviour of an AF_INET 1641da177e4SLinus Torvalds * socket object. Mostly it punts to the subprotocols of IP to do 1651da177e4SLinus Torvalds * the work. 1661da177e4SLinus Torvalds */ 1671da177e4SLinus Torvalds 1681da177e4SLinus Torvalds /* 1691da177e4SLinus Torvalds * Automatically bind an unbound socket. 1701da177e4SLinus Torvalds */ 1711da177e4SLinus Torvalds 1721da177e4SLinus Torvalds static int inet_autobind(struct sock *sk) 1731da177e4SLinus Torvalds { 1741da177e4SLinus Torvalds struct inet_sock *inet; 1751da177e4SLinus Torvalds /* We may need to bind the socket. */ 1761da177e4SLinus Torvalds lock_sock(sk); 1771da177e4SLinus Torvalds inet = inet_sk(sk); 178c720c7e8SEric Dumazet if (!inet->inet_num) { 1791da177e4SLinus Torvalds if (sk->sk_prot->get_port(sk, 0)) { 1801da177e4SLinus Torvalds release_sock(sk); 1811da177e4SLinus Torvalds return -EAGAIN; 1821da177e4SLinus Torvalds } 183c720c7e8SEric Dumazet inet->inet_sport = htons(inet->inet_num); 1841da177e4SLinus Torvalds } 1851da177e4SLinus Torvalds release_sock(sk); 1861da177e4SLinus Torvalds return 0; 1871da177e4SLinus Torvalds } 1881da177e4SLinus Torvalds 1891da177e4SLinus Torvalds /* 1901da177e4SLinus Torvalds * Move a socket into listening state. 1911da177e4SLinus Torvalds */ 1921da177e4SLinus Torvalds int inet_listen(struct socket *sock, int backlog) 1931da177e4SLinus Torvalds { 1941da177e4SLinus Torvalds struct sock *sk = sock->sk; 1951da177e4SLinus Torvalds unsigned char old_state; 1961da177e4SLinus Torvalds int err; 1971da177e4SLinus Torvalds 1981da177e4SLinus Torvalds lock_sock(sk); 1991da177e4SLinus Torvalds 2001da177e4SLinus Torvalds err = -EINVAL; 2011da177e4SLinus Torvalds if (sock->state != SS_UNCONNECTED || sock->type != SOCK_STREAM) 2021da177e4SLinus Torvalds goto out; 2031da177e4SLinus Torvalds 2041da177e4SLinus Torvalds old_state = sk->sk_state; 2051da177e4SLinus Torvalds if (!((1 << old_state) & (TCPF_CLOSE | TCPF_LISTEN))) 2061da177e4SLinus Torvalds goto out; 2071da177e4SLinus Torvalds 2081da177e4SLinus Torvalds /* Really, if the socket is already in listen state 2091da177e4SLinus Torvalds * we can only allow the backlog to be adjusted. 2101da177e4SLinus Torvalds */ 2111da177e4SLinus Torvalds if (old_state != TCP_LISTEN) { 2128336886fSJerry Chu /* Check special setups for testing purpose to enable TFO w/o 2138336886fSJerry Chu * requiring TCP_FASTOPEN sockopt. 2148336886fSJerry Chu * Note that only TCP sockets (SOCK_STREAM) will reach here. 2158336886fSJerry Chu * Also fastopenq may already been allocated because this 2168336886fSJerry Chu * socket was in TCP_LISTEN state previously but was 2178336886fSJerry Chu * shutdown() (rather than close()). 2188336886fSJerry Chu */ 2198336886fSJerry Chu if ((sysctl_tcp_fastopen & TFO_SERVER_ENABLE) != 0 && 2208336886fSJerry Chu inet_csk(sk)->icsk_accept_queue.fastopenq == NULL) { 2218336886fSJerry Chu if ((sysctl_tcp_fastopen & TFO_SERVER_WO_SOCKOPT1) != 0) 2228336886fSJerry Chu err = fastopen_init_queue(sk, backlog); 2238336886fSJerry Chu else if ((sysctl_tcp_fastopen & 2248336886fSJerry Chu TFO_SERVER_WO_SOCKOPT2) != 0) 2258336886fSJerry Chu err = fastopen_init_queue(sk, 2268336886fSJerry Chu ((uint)sysctl_tcp_fastopen) >> 16); 2278336886fSJerry Chu else 2288336886fSJerry Chu err = 0; 2298336886fSJerry Chu if (err) 2308336886fSJerry Chu goto out; 2318336886fSJerry Chu } 23272a3effaSEric Dumazet err = inet_csk_listen_start(sk, backlog); 2331da177e4SLinus Torvalds if (err) 2341da177e4SLinus Torvalds goto out; 2351da177e4SLinus Torvalds } 2361da177e4SLinus Torvalds sk->sk_max_ack_backlog = backlog; 2371da177e4SLinus Torvalds err = 0; 2381da177e4SLinus Torvalds 2391da177e4SLinus Torvalds out: 2401da177e4SLinus Torvalds release_sock(sk); 2411da177e4SLinus Torvalds return err; 2421da177e4SLinus Torvalds } 2433d1427f8SEric Dumazet EXPORT_SYMBOL(inet_listen); 2441da177e4SLinus Torvalds 2451da177e4SLinus Torvalds /* 2461da177e4SLinus Torvalds * Create an inet socket. 2471da177e4SLinus Torvalds */ 2481da177e4SLinus Torvalds 2493f378b68SEric Paris static int inet_create(struct net *net, struct socket *sock, int protocol, 2503f378b68SEric Paris int kern) 2511da177e4SLinus Torvalds { 2521da177e4SLinus Torvalds struct sock *sk; 2531da177e4SLinus Torvalds struct inet_protosw *answer; 2541da177e4SLinus Torvalds struct inet_sock *inet; 2551da177e4SLinus Torvalds struct proto *answer_prot; 2561da177e4SLinus Torvalds unsigned char answer_flags; 2571da177e4SLinus Torvalds char answer_no_check; 258bb97d31fSArnaldo Carvalho de Melo int try_loading_module = 0; 25986c8f9d1SHerbert Xu int err; 2601da177e4SLinus Torvalds 2611da177e4SLinus Torvalds sock->state = SS_UNCONNECTED; 2621da177e4SLinus Torvalds 2631da177e4SLinus Torvalds /* Look for the requested type/protocol pair. */ 264bb97d31fSArnaldo Carvalho de Melo lookup_protocol: 26586c8f9d1SHerbert Xu err = -ESOCKTNOSUPPORT; 2661da177e4SLinus Torvalds rcu_read_lock(); 267696adfe8SPaul E. McKenney list_for_each_entry_rcu(answer, &inetsw[sock->type], list) { 2681da177e4SLinus Torvalds 269696adfe8SPaul E. McKenney err = 0; 2701da177e4SLinus Torvalds /* Check the non-wild match. */ 2711da177e4SLinus Torvalds if (protocol == answer->protocol) { 2721da177e4SLinus Torvalds if (protocol != IPPROTO_IP) 2731da177e4SLinus Torvalds break; 2741da177e4SLinus Torvalds } else { 2751da177e4SLinus Torvalds /* Check for the two wild cases. */ 2761da177e4SLinus Torvalds if (IPPROTO_IP == protocol) { 2771da177e4SLinus Torvalds protocol = answer->protocol; 2781da177e4SLinus Torvalds break; 2791da177e4SLinus Torvalds } 2801da177e4SLinus Torvalds if (IPPROTO_IP == answer->protocol) 2811da177e4SLinus Torvalds break; 2821da177e4SLinus Torvalds } 28386c8f9d1SHerbert Xu err = -EPROTONOSUPPORT; 2841da177e4SLinus Torvalds } 2851da177e4SLinus Torvalds 286696adfe8SPaul E. McKenney if (unlikely(err)) { 287bb97d31fSArnaldo Carvalho de Melo if (try_loading_module < 2) { 288bb97d31fSArnaldo Carvalho de Melo rcu_read_unlock(); 289bb97d31fSArnaldo Carvalho de Melo /* 290bb97d31fSArnaldo Carvalho de Melo * Be more specific, e.g. net-pf-2-proto-132-type-1 291bb97d31fSArnaldo Carvalho de Melo * (net-pf-PF_INET-proto-IPPROTO_SCTP-type-SOCK_STREAM) 292bb97d31fSArnaldo Carvalho de Melo */ 293bb97d31fSArnaldo Carvalho de Melo if (++try_loading_module == 1) 294bb97d31fSArnaldo Carvalho de Melo request_module("net-pf-%d-proto-%d-type-%d", 295bb97d31fSArnaldo Carvalho de Melo PF_INET, protocol, sock->type); 296bb97d31fSArnaldo Carvalho de Melo /* 297bb97d31fSArnaldo Carvalho de Melo * Fall back to generic, e.g. net-pf-2-proto-132 298bb97d31fSArnaldo Carvalho de Melo * (net-pf-PF_INET-proto-IPPROTO_SCTP) 299bb97d31fSArnaldo Carvalho de Melo */ 300bb97d31fSArnaldo Carvalho de Melo else 301bb97d31fSArnaldo Carvalho de Melo request_module("net-pf-%d-proto-%d", 302bb97d31fSArnaldo Carvalho de Melo PF_INET, protocol); 303bb97d31fSArnaldo Carvalho de Melo goto lookup_protocol; 304bb97d31fSArnaldo Carvalho de Melo } else 3051da177e4SLinus Torvalds goto out_rcu_unlock; 306bb97d31fSArnaldo Carvalho de Melo } 307bb97d31fSArnaldo Carvalho de Melo 3081da177e4SLinus Torvalds err = -EPERM; 30952e804c6SEric W. Biederman if (sock->type == SOCK_RAW && !kern && 31052e804c6SEric W. Biederman !ns_capable(net->user_ns, CAP_NET_RAW)) 3111da177e4SLinus Torvalds goto out_rcu_unlock; 3121da177e4SLinus Torvalds 3131da177e4SLinus Torvalds sock->ops = answer->ops; 3141da177e4SLinus Torvalds answer_prot = answer->prot; 3151da177e4SLinus Torvalds answer_no_check = answer->no_check; 3161da177e4SLinus Torvalds answer_flags = answer->flags; 3171da177e4SLinus Torvalds rcu_read_unlock(); 3181da177e4SLinus Torvalds 319547b792cSIlpo Järvinen WARN_ON(answer_prot->slab == NULL); 3201da177e4SLinus Torvalds 3211da177e4SLinus Torvalds err = -ENOBUFS; 3226257ff21SPavel Emelyanov sk = sk_alloc(net, PF_INET, GFP_KERNEL, answer_prot); 3231da177e4SLinus Torvalds if (sk == NULL) 3241da177e4SLinus Torvalds goto out; 3251da177e4SLinus Torvalds 3261da177e4SLinus Torvalds err = 0; 3271da177e4SLinus Torvalds sk->sk_no_check = answer_no_check; 3281da177e4SLinus Torvalds if (INET_PROTOSW_REUSE & answer_flags) 3294a17fd52SPavel Emelyanov sk->sk_reuse = SK_CAN_REUSE; 3301da177e4SLinus Torvalds 3311da177e4SLinus Torvalds inet = inet_sk(sk); 332469de9b9SPaul Moore inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0; 3331da177e4SLinus Torvalds 3347b2ff18eSJiri Olsa inet->nodefrag = 0; 3357b2ff18eSJiri Olsa 3361da177e4SLinus Torvalds if (SOCK_RAW == sock->type) { 337c720c7e8SEric Dumazet inet->inet_num = protocol; 3381da177e4SLinus Torvalds if (IPPROTO_RAW == protocol) 3391da177e4SLinus Torvalds inet->hdrincl = 1; 3401da177e4SLinus Torvalds } 3411da177e4SLinus Torvalds 342974eda11SHannes Frederic Sowa if (net->ipv4.sysctl_ip_no_pmtu_disc) 3431da177e4SLinus Torvalds inet->pmtudisc = IP_PMTUDISC_DONT; 3441da177e4SLinus Torvalds else 3451da177e4SLinus Torvalds inet->pmtudisc = IP_PMTUDISC_WANT; 3461da177e4SLinus Torvalds 347c720c7e8SEric Dumazet inet->inet_id = 0; 3481da177e4SLinus Torvalds 3491da177e4SLinus Torvalds sock_init_data(sock, sk); 3501da177e4SLinus Torvalds 3511da177e4SLinus Torvalds sk->sk_destruct = inet_sock_destruct; 3521da177e4SLinus Torvalds sk->sk_protocol = protocol; 3531da177e4SLinus Torvalds sk->sk_backlog_rcv = sk->sk_prot->backlog_rcv; 3541da177e4SLinus Torvalds 3551da177e4SLinus Torvalds inet->uc_ttl = -1; 3561da177e4SLinus Torvalds inet->mc_loop = 1; 3571da177e4SLinus Torvalds inet->mc_ttl = 1; 358f771bef9SNivedita Singhvi inet->mc_all = 1; 3591da177e4SLinus Torvalds inet->mc_index = 0; 3601da177e4SLinus Torvalds inet->mc_list = NULL; 3614c507d28SJiri Benc inet->rcv_tos = 0; 3621da177e4SLinus Torvalds 363e6848976SArnaldo Carvalho de Melo sk_refcnt_debug_inc(sk); 3641da177e4SLinus Torvalds 365c720c7e8SEric Dumazet if (inet->inet_num) { 3661da177e4SLinus Torvalds /* It assumes that any protocol which allows 3671da177e4SLinus Torvalds * the user to assign a number at socket 3681da177e4SLinus Torvalds * creation time automatically 3691da177e4SLinus Torvalds * shares. 3701da177e4SLinus Torvalds */ 371c720c7e8SEric Dumazet inet->inet_sport = htons(inet->inet_num); 3721da177e4SLinus Torvalds /* Add to protocol hash chains. */ 3731da177e4SLinus Torvalds sk->sk_prot->hash(sk); 3741da177e4SLinus Torvalds } 3751da177e4SLinus Torvalds 3761da177e4SLinus Torvalds if (sk->sk_prot->init) { 3771da177e4SLinus Torvalds err = sk->sk_prot->init(sk); 3781da177e4SLinus Torvalds if (err) 3791da177e4SLinus Torvalds sk_common_release(sk); 3801da177e4SLinus Torvalds } 3811da177e4SLinus Torvalds out: 3821da177e4SLinus Torvalds return err; 3831da177e4SLinus Torvalds out_rcu_unlock: 3841da177e4SLinus Torvalds rcu_read_unlock(); 3851da177e4SLinus Torvalds goto out; 3861da177e4SLinus Torvalds } 3871da177e4SLinus Torvalds 3881da177e4SLinus Torvalds 3891da177e4SLinus Torvalds /* 3901da177e4SLinus Torvalds * The peer socket should always be NULL (or else). When we call this 3911da177e4SLinus Torvalds * function we are destroying the object and from then on nobody 3921da177e4SLinus Torvalds * should refer to it. 3931da177e4SLinus Torvalds */ 3941da177e4SLinus Torvalds int inet_release(struct socket *sock) 3951da177e4SLinus Torvalds { 3961da177e4SLinus Torvalds struct sock *sk = sock->sk; 3971da177e4SLinus Torvalds 3981da177e4SLinus Torvalds if (sk) { 3991da177e4SLinus Torvalds long timeout; 4001da177e4SLinus Torvalds 401c58dc01bSDavid S. Miller sock_rps_reset_flow(sk); 402fec5e652STom Herbert 4031da177e4SLinus Torvalds /* Applications forget to leave groups before exiting */ 4041da177e4SLinus Torvalds ip_mc_drop_socket(sk); 4051da177e4SLinus Torvalds 4061da177e4SLinus Torvalds /* If linger is set, we don't return until the close 4071da177e4SLinus Torvalds * is complete. Otherwise we return immediately. The 4081da177e4SLinus Torvalds * actually closing is done the same either way. 4091da177e4SLinus Torvalds * 4101da177e4SLinus Torvalds * If the close is due to the process exiting, we never 4111da177e4SLinus Torvalds * linger.. 4121da177e4SLinus Torvalds */ 4131da177e4SLinus Torvalds timeout = 0; 4141da177e4SLinus Torvalds if (sock_flag(sk, SOCK_LINGER) && 4151da177e4SLinus Torvalds !(current->flags & PF_EXITING)) 4161da177e4SLinus Torvalds timeout = sk->sk_lingertime; 4171da177e4SLinus Torvalds sock->sk = NULL; 4181da177e4SLinus Torvalds sk->sk_prot->close(sk, timeout); 4191da177e4SLinus Torvalds } 4201da177e4SLinus Torvalds return 0; 4211da177e4SLinus Torvalds } 4223d1427f8SEric Dumazet EXPORT_SYMBOL(inet_release); 4231da177e4SLinus Torvalds 4241da177e4SLinus Torvalds /* It is off by default, see below. */ 425ab32ea5dSBrian Haley int sysctl_ip_nonlocal_bind __read_mostly; 4263d1427f8SEric Dumazet EXPORT_SYMBOL(sysctl_ip_nonlocal_bind); 4271da177e4SLinus Torvalds 4281da177e4SLinus Torvalds int inet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) 4291da177e4SLinus Torvalds { 4301da177e4SLinus Torvalds struct sockaddr_in *addr = (struct sockaddr_in *)uaddr; 4311da177e4SLinus Torvalds struct sock *sk = sock->sk; 4321da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 4333594698aSEric W. Biederman struct net *net = sock_net(sk); 4341da177e4SLinus Torvalds unsigned short snum; 4351da177e4SLinus Torvalds int chk_addr_ret; 4361da177e4SLinus Torvalds int err; 4371da177e4SLinus Torvalds 4381da177e4SLinus Torvalds /* If the socket has its own bind function then use it. (RAW) */ 4391da177e4SLinus Torvalds if (sk->sk_prot->bind) { 4401da177e4SLinus Torvalds err = sk->sk_prot->bind(sk, uaddr, addr_len); 4411da177e4SLinus Torvalds goto out; 4421da177e4SLinus Torvalds } 4431da177e4SLinus Torvalds err = -EINVAL; 4441da177e4SLinus Torvalds if (addr_len < sizeof(struct sockaddr_in)) 4451da177e4SLinus Torvalds goto out; 4461da177e4SLinus Torvalds 447c349a528SMarcus Meissner if (addr->sin_family != AF_INET) { 44829c486dfSEric Dumazet /* Compatibility games : accept AF_UNSPEC (mapped to AF_INET) 44929c486dfSEric Dumazet * only if s_addr is INADDR_ANY. 45029c486dfSEric Dumazet */ 451c349a528SMarcus Meissner err = -EAFNOSUPPORT; 45229c486dfSEric Dumazet if (addr->sin_family != AF_UNSPEC || 45329c486dfSEric Dumazet addr->sin_addr.s_addr != htonl(INADDR_ANY)) 454d0733d2eSMarcus Meissner goto out; 455c349a528SMarcus Meissner } 456d0733d2eSMarcus Meissner 4573594698aSEric W. Biederman chk_addr_ret = inet_addr_type(net, addr->sin_addr.s_addr); 4581da177e4SLinus Torvalds 4591da177e4SLinus Torvalds /* Not specified by any standard per-se, however it breaks too 4601da177e4SLinus Torvalds * many applications when removed. It is unfortunate since 4611da177e4SLinus Torvalds * allowing applications to make a non-local bind solves 4621da177e4SLinus Torvalds * several problems with systems using dynamic addressing. 4631da177e4SLinus Torvalds * (ie. your servers still start up even if your ISDN link 4641da177e4SLinus Torvalds * is temporarily down) 4651da177e4SLinus Torvalds */ 4661da177e4SLinus Torvalds err = -EADDRNOTAVAIL; 4671da177e4SLinus Torvalds if (!sysctl_ip_nonlocal_bind && 468b9fb1506STóth László Attila !(inet->freebind || inet->transparent) && 469e6f1cebfSAl Viro addr->sin_addr.s_addr != htonl(INADDR_ANY) && 4701da177e4SLinus Torvalds chk_addr_ret != RTN_LOCAL && 4711da177e4SLinus Torvalds chk_addr_ret != RTN_MULTICAST && 4721da177e4SLinus Torvalds chk_addr_ret != RTN_BROADCAST) 4731da177e4SLinus Torvalds goto out; 4741da177e4SLinus Torvalds 4751da177e4SLinus Torvalds snum = ntohs(addr->sin_port); 4761da177e4SLinus Torvalds err = -EACCES; 4773594698aSEric W. Biederman if (snum && snum < PROT_SOCK && 4783594698aSEric W. Biederman !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE)) 4791da177e4SLinus Torvalds goto out; 4801da177e4SLinus Torvalds 4811da177e4SLinus Torvalds /* We keep a pair of addresses. rcv_saddr is the one 4821da177e4SLinus Torvalds * used by hash lookups, and saddr is used for transmit. 4831da177e4SLinus Torvalds * 4841da177e4SLinus Torvalds * In the BSD API these are the same except where it 4851da177e4SLinus Torvalds * would be illegal to use them (multicast/broadcast) in 4861da177e4SLinus Torvalds * which case the sending device address is used. 4871da177e4SLinus Torvalds */ 4881da177e4SLinus Torvalds lock_sock(sk); 4891da177e4SLinus Torvalds 4901da177e4SLinus Torvalds /* Check these errors (active socket, double bind). */ 4911da177e4SLinus Torvalds err = -EINVAL; 492c720c7e8SEric Dumazet if (sk->sk_state != TCP_CLOSE || inet->inet_num) 4931da177e4SLinus Torvalds goto out_release_sock; 4941da177e4SLinus Torvalds 495c720c7e8SEric Dumazet inet->inet_rcv_saddr = inet->inet_saddr = addr->sin_addr.s_addr; 4961da177e4SLinus Torvalds if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST) 497c720c7e8SEric Dumazet inet->inet_saddr = 0; /* Use device */ 4981da177e4SLinus Torvalds 4991da177e4SLinus Torvalds /* Make sure we are allowed to bind here. */ 5001da177e4SLinus Torvalds if (sk->sk_prot->get_port(sk, snum)) { 501c720c7e8SEric Dumazet inet->inet_saddr = inet->inet_rcv_saddr = 0; 5021da177e4SLinus Torvalds err = -EADDRINUSE; 5031da177e4SLinus Torvalds goto out_release_sock; 5041da177e4SLinus Torvalds } 5051da177e4SLinus Torvalds 506c720c7e8SEric Dumazet if (inet->inet_rcv_saddr) 5071da177e4SLinus Torvalds sk->sk_userlocks |= SOCK_BINDADDR_LOCK; 5081da177e4SLinus Torvalds if (snum) 5091da177e4SLinus Torvalds sk->sk_userlocks |= SOCK_BINDPORT_LOCK; 510c720c7e8SEric Dumazet inet->inet_sport = htons(inet->inet_num); 511c720c7e8SEric Dumazet inet->inet_daddr = 0; 512c720c7e8SEric Dumazet inet->inet_dport = 0; 5131da177e4SLinus Torvalds sk_dst_reset(sk); 5141da177e4SLinus Torvalds err = 0; 5151da177e4SLinus Torvalds out_release_sock: 5161da177e4SLinus Torvalds release_sock(sk); 5171da177e4SLinus Torvalds out: 5181da177e4SLinus Torvalds return err; 5191da177e4SLinus Torvalds } 5203d1427f8SEric Dumazet EXPORT_SYMBOL(inet_bind); 5211da177e4SLinus Torvalds 5221da177e4SLinus Torvalds int inet_dgram_connect(struct socket *sock, struct sockaddr *uaddr, 5231da177e4SLinus Torvalds int addr_len, int flags) 5241da177e4SLinus Torvalds { 5251da177e4SLinus Torvalds struct sock *sk = sock->sk; 5261da177e4SLinus Torvalds 5276503d961SChangli Gao if (addr_len < sizeof(uaddr->sa_family)) 5286503d961SChangli Gao return -EINVAL; 5291da177e4SLinus Torvalds if (uaddr->sa_family == AF_UNSPEC) 5301da177e4SLinus Torvalds return sk->sk_prot->disconnect(sk, flags); 5311da177e4SLinus Torvalds 532c720c7e8SEric Dumazet if (!inet_sk(sk)->inet_num && inet_autobind(sk)) 5331da177e4SLinus Torvalds return -EAGAIN; 534e3192690SJoe Perches return sk->sk_prot->connect(sk, uaddr, addr_len); 5351da177e4SLinus Torvalds } 5363d1427f8SEric Dumazet EXPORT_SYMBOL(inet_dgram_connect); 5371da177e4SLinus Torvalds 538783237e8SYuchung Cheng static long inet_wait_for_connect(struct sock *sk, long timeo, int writebias) 5391da177e4SLinus Torvalds { 5401da177e4SLinus Torvalds DEFINE_WAIT(wait); 5411da177e4SLinus Torvalds 542aa395145SEric Dumazet prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); 543783237e8SYuchung Cheng sk->sk_write_pending += writebias; 5441da177e4SLinus Torvalds 5451da177e4SLinus Torvalds /* Basic assumption: if someone sets sk->sk_err, he _must_ 5461da177e4SLinus Torvalds * change state of the socket from TCP_SYN_*. 5471da177e4SLinus Torvalds * Connect() does not allow to get error notifications 5481da177e4SLinus Torvalds * without closing the socket. 5491da177e4SLinus Torvalds */ 5501da177e4SLinus Torvalds while ((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV)) { 5511da177e4SLinus Torvalds release_sock(sk); 5521da177e4SLinus Torvalds timeo = schedule_timeout(timeo); 5531da177e4SLinus Torvalds lock_sock(sk); 5541da177e4SLinus Torvalds if (signal_pending(current) || !timeo) 5551da177e4SLinus Torvalds break; 556aa395145SEric Dumazet prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); 5571da177e4SLinus Torvalds } 558aa395145SEric Dumazet finish_wait(sk_sleep(sk), &wait); 559783237e8SYuchung Cheng sk->sk_write_pending -= writebias; 5601da177e4SLinus Torvalds return timeo; 5611da177e4SLinus Torvalds } 5621da177e4SLinus Torvalds 5631da177e4SLinus Torvalds /* 5641da177e4SLinus Torvalds * Connect to a remote host. There is regrettably still a little 5651da177e4SLinus Torvalds * TCP 'magic' in here. 5661da177e4SLinus Torvalds */ 567cf60af03SYuchung Cheng int __inet_stream_connect(struct socket *sock, struct sockaddr *uaddr, 5681da177e4SLinus Torvalds int addr_len, int flags) 5691da177e4SLinus Torvalds { 5701da177e4SLinus Torvalds struct sock *sk = sock->sk; 5711da177e4SLinus Torvalds int err; 5721da177e4SLinus Torvalds long timeo; 5731da177e4SLinus Torvalds 5746503d961SChangli Gao if (addr_len < sizeof(uaddr->sa_family)) 5756503d961SChangli Gao return -EINVAL; 5766503d961SChangli Gao 5771da177e4SLinus Torvalds if (uaddr->sa_family == AF_UNSPEC) { 5781da177e4SLinus Torvalds err = sk->sk_prot->disconnect(sk, flags); 5791da177e4SLinus Torvalds sock->state = err ? SS_DISCONNECTING : SS_UNCONNECTED; 5801da177e4SLinus Torvalds goto out; 5811da177e4SLinus Torvalds } 5821da177e4SLinus Torvalds 5831da177e4SLinus Torvalds switch (sock->state) { 5841da177e4SLinus Torvalds default: 5851da177e4SLinus Torvalds err = -EINVAL; 5861da177e4SLinus Torvalds goto out; 5871da177e4SLinus Torvalds case SS_CONNECTED: 5881da177e4SLinus Torvalds err = -EISCONN; 5891da177e4SLinus Torvalds goto out; 5901da177e4SLinus Torvalds case SS_CONNECTING: 5911da177e4SLinus Torvalds err = -EALREADY; 5921da177e4SLinus Torvalds /* Fall out of switch with err, set for this state */ 5931da177e4SLinus Torvalds break; 5941da177e4SLinus Torvalds case SS_UNCONNECTED: 5951da177e4SLinus Torvalds err = -EISCONN; 5961da177e4SLinus Torvalds if (sk->sk_state != TCP_CLOSE) 5971da177e4SLinus Torvalds goto out; 5981da177e4SLinus Torvalds 5991da177e4SLinus Torvalds err = sk->sk_prot->connect(sk, uaddr, addr_len); 6001da177e4SLinus Torvalds if (err < 0) 6011da177e4SLinus Torvalds goto out; 6021da177e4SLinus Torvalds 6031da177e4SLinus Torvalds sock->state = SS_CONNECTING; 6041da177e4SLinus Torvalds 6051da177e4SLinus Torvalds /* Just entered SS_CONNECTING state; the only 6061da177e4SLinus Torvalds * difference is that return value in non-blocking 6071da177e4SLinus Torvalds * case is EINPROGRESS, rather than EALREADY. 6081da177e4SLinus Torvalds */ 6091da177e4SLinus Torvalds err = -EINPROGRESS; 6101da177e4SLinus Torvalds break; 6111da177e4SLinus Torvalds } 6121da177e4SLinus Torvalds 6131da177e4SLinus Torvalds timeo = sock_sndtimeo(sk, flags & O_NONBLOCK); 6141da177e4SLinus Torvalds 6151da177e4SLinus Torvalds if ((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV)) { 616783237e8SYuchung Cheng int writebias = (sk->sk_protocol == IPPROTO_TCP) && 617783237e8SYuchung Cheng tcp_sk(sk)->fastopen_req && 618783237e8SYuchung Cheng tcp_sk(sk)->fastopen_req->data ? 1 : 0; 619783237e8SYuchung Cheng 6201da177e4SLinus Torvalds /* Error code is set above */ 621783237e8SYuchung Cheng if (!timeo || !inet_wait_for_connect(sk, timeo, writebias)) 6221da177e4SLinus Torvalds goto out; 6231da177e4SLinus Torvalds 6241da177e4SLinus Torvalds err = sock_intr_errno(timeo); 6251da177e4SLinus Torvalds if (signal_pending(current)) 6261da177e4SLinus Torvalds goto out; 6271da177e4SLinus Torvalds } 6281da177e4SLinus Torvalds 6291da177e4SLinus Torvalds /* Connection was closed by RST, timeout, ICMP error 6301da177e4SLinus Torvalds * or another process disconnected us. 6311da177e4SLinus Torvalds */ 6321da177e4SLinus Torvalds if (sk->sk_state == TCP_CLOSE) 6331da177e4SLinus Torvalds goto sock_error; 6341da177e4SLinus Torvalds 6351da177e4SLinus Torvalds /* sk->sk_err may be not zero now, if RECVERR was ordered by user 6361da177e4SLinus Torvalds * and error was received after socket entered established state. 6371da177e4SLinus Torvalds * Hence, it is handled normally after connect() return successfully. 6381da177e4SLinus Torvalds */ 6391da177e4SLinus Torvalds 6401da177e4SLinus Torvalds sock->state = SS_CONNECTED; 6411da177e4SLinus Torvalds err = 0; 6421da177e4SLinus Torvalds out: 6431da177e4SLinus Torvalds return err; 6441da177e4SLinus Torvalds 6451da177e4SLinus Torvalds sock_error: 6461da177e4SLinus Torvalds err = sock_error(sk) ? : -ECONNABORTED; 6471da177e4SLinus Torvalds sock->state = SS_UNCONNECTED; 6481da177e4SLinus Torvalds if (sk->sk_prot->disconnect(sk, flags)) 6491da177e4SLinus Torvalds sock->state = SS_DISCONNECTING; 6501da177e4SLinus Torvalds goto out; 6511da177e4SLinus Torvalds } 652cf60af03SYuchung Cheng EXPORT_SYMBOL(__inet_stream_connect); 653cf60af03SYuchung Cheng 654cf60af03SYuchung Cheng int inet_stream_connect(struct socket *sock, struct sockaddr *uaddr, 655cf60af03SYuchung Cheng int addr_len, int flags) 656cf60af03SYuchung Cheng { 657cf60af03SYuchung Cheng int err; 658cf60af03SYuchung Cheng 659cf60af03SYuchung Cheng lock_sock(sock->sk); 660cf60af03SYuchung Cheng err = __inet_stream_connect(sock, uaddr, addr_len, flags); 661cf60af03SYuchung Cheng release_sock(sock->sk); 662cf60af03SYuchung Cheng return err; 663cf60af03SYuchung Cheng } 6643d1427f8SEric Dumazet EXPORT_SYMBOL(inet_stream_connect); 6651da177e4SLinus Torvalds 6661da177e4SLinus Torvalds /* 6671da177e4SLinus Torvalds * Accept a pending connection. The TCP layer now gives BSD semantics. 6681da177e4SLinus Torvalds */ 6691da177e4SLinus Torvalds 6701da177e4SLinus Torvalds int inet_accept(struct socket *sock, struct socket *newsock, int flags) 6711da177e4SLinus Torvalds { 6721da177e4SLinus Torvalds struct sock *sk1 = sock->sk; 6731da177e4SLinus Torvalds int err = -EINVAL; 6741da177e4SLinus Torvalds struct sock *sk2 = sk1->sk_prot->accept(sk1, flags, &err); 6751da177e4SLinus Torvalds 6761da177e4SLinus Torvalds if (!sk2) 6771da177e4SLinus Torvalds goto do_err; 6781da177e4SLinus Torvalds 6791da177e4SLinus Torvalds lock_sock(sk2); 6801da177e4SLinus Torvalds 6811eddceadSEric Dumazet sock_rps_record_flow(sk2); 682547b792cSIlpo Järvinen WARN_ON(!((1 << sk2->sk_state) & 6838336886fSJerry Chu (TCPF_ESTABLISHED | TCPF_SYN_RECV | 6848336886fSJerry Chu TCPF_CLOSE_WAIT | TCPF_CLOSE))); 6851da177e4SLinus Torvalds 6861da177e4SLinus Torvalds sock_graft(sk2, newsock); 6871da177e4SLinus Torvalds 6881da177e4SLinus Torvalds newsock->state = SS_CONNECTED; 6891da177e4SLinus Torvalds err = 0; 6901da177e4SLinus Torvalds release_sock(sk2); 6911da177e4SLinus Torvalds do_err: 6921da177e4SLinus Torvalds return err; 6931da177e4SLinus Torvalds } 6943d1427f8SEric Dumazet EXPORT_SYMBOL(inet_accept); 6951da177e4SLinus Torvalds 6961da177e4SLinus Torvalds 6971da177e4SLinus Torvalds /* 6981da177e4SLinus Torvalds * This does both peername and sockname. 6991da177e4SLinus Torvalds */ 7001da177e4SLinus Torvalds int inet_getname(struct socket *sock, struct sockaddr *uaddr, 7011da177e4SLinus Torvalds int *uaddr_len, int peer) 7021da177e4SLinus Torvalds { 7031da177e4SLinus Torvalds struct sock *sk = sock->sk; 7041da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 70538bfd8f5SCyrill Gorcunov DECLARE_SOCKADDR(struct sockaddr_in *, sin, uaddr); 7061da177e4SLinus Torvalds 7071da177e4SLinus Torvalds sin->sin_family = AF_INET; 7081da177e4SLinus Torvalds if (peer) { 709c720c7e8SEric Dumazet if (!inet->inet_dport || 7101da177e4SLinus Torvalds (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) && 7111da177e4SLinus Torvalds peer == 1)) 7121da177e4SLinus Torvalds return -ENOTCONN; 713c720c7e8SEric Dumazet sin->sin_port = inet->inet_dport; 714c720c7e8SEric Dumazet sin->sin_addr.s_addr = inet->inet_daddr; 7151da177e4SLinus Torvalds } else { 716c720c7e8SEric Dumazet __be32 addr = inet->inet_rcv_saddr; 7171da177e4SLinus Torvalds if (!addr) 718c720c7e8SEric Dumazet addr = inet->inet_saddr; 719c720c7e8SEric Dumazet sin->sin_port = inet->inet_sport; 7201da177e4SLinus Torvalds sin->sin_addr.s_addr = addr; 7211da177e4SLinus Torvalds } 7221da177e4SLinus Torvalds memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); 7231da177e4SLinus Torvalds *uaddr_len = sizeof(*sin); 7241da177e4SLinus Torvalds return 0; 7251da177e4SLinus Torvalds } 7263d1427f8SEric Dumazet EXPORT_SYMBOL(inet_getname); 7271da177e4SLinus Torvalds 7281da177e4SLinus Torvalds int inet_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, 7291da177e4SLinus Torvalds size_t size) 7301da177e4SLinus Torvalds { 7311da177e4SLinus Torvalds struct sock *sk = sock->sk; 7321da177e4SLinus Torvalds 733c58dc01bSDavid S. Miller sock_rps_record_flow(sk); 734fec5e652STom Herbert 7351da177e4SLinus Torvalds /* We may need to bind the socket. */ 7367ba42910SChangli Gao if (!inet_sk(sk)->inet_num && !sk->sk_prot->no_autobind && 7377ba42910SChangli Gao inet_autobind(sk)) 7381da177e4SLinus Torvalds return -EAGAIN; 7391da177e4SLinus Torvalds 7401da177e4SLinus Torvalds return sk->sk_prot->sendmsg(iocb, sk, msg, size); 7411da177e4SLinus Torvalds } 7423d1427f8SEric Dumazet EXPORT_SYMBOL(inet_sendmsg); 7431da177e4SLinus Torvalds 7447ba42910SChangli Gao ssize_t inet_sendpage(struct socket *sock, struct page *page, int offset, 7453d1427f8SEric Dumazet size_t size, int flags) 7461da177e4SLinus Torvalds { 7471da177e4SLinus Torvalds struct sock *sk = sock->sk; 7481da177e4SLinus Torvalds 749c58dc01bSDavid S. Miller sock_rps_record_flow(sk); 750fec5e652STom Herbert 7511da177e4SLinus Torvalds /* We may need to bind the socket. */ 7527ba42910SChangli Gao if (!inet_sk(sk)->inet_num && !sk->sk_prot->no_autobind && 7537ba42910SChangli Gao inet_autobind(sk)) 7541da177e4SLinus Torvalds return -EAGAIN; 7551da177e4SLinus Torvalds 7561da177e4SLinus Torvalds if (sk->sk_prot->sendpage) 7571da177e4SLinus Torvalds return sk->sk_prot->sendpage(sk, page, offset, size, flags); 7581da177e4SLinus Torvalds return sock_no_sendpage(sock, page, offset, size, flags); 7591da177e4SLinus Torvalds } 7607ba42910SChangli Gao EXPORT_SYMBOL(inet_sendpage); 7611da177e4SLinus Torvalds 762fec5e652STom Herbert int inet_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, 763fec5e652STom Herbert size_t size, int flags) 764fec5e652STom Herbert { 765fec5e652STom Herbert struct sock *sk = sock->sk; 766fec5e652STom Herbert int addr_len = 0; 767fec5e652STom Herbert int err; 768fec5e652STom Herbert 769c58dc01bSDavid S. Miller sock_rps_record_flow(sk); 770fec5e652STom Herbert 771fec5e652STom Herbert err = sk->sk_prot->recvmsg(iocb, sk, msg, size, flags & MSG_DONTWAIT, 772fec5e652STom Herbert flags & ~MSG_DONTWAIT, &addr_len); 773fec5e652STom Herbert if (err >= 0) 774fec5e652STom Herbert msg->msg_namelen = addr_len; 775fec5e652STom Herbert return err; 776fec5e652STom Herbert } 777fec5e652STom Herbert EXPORT_SYMBOL(inet_recvmsg); 7781da177e4SLinus Torvalds 7791da177e4SLinus Torvalds int inet_shutdown(struct socket *sock, int how) 7801da177e4SLinus Torvalds { 7811da177e4SLinus Torvalds struct sock *sk = sock->sk; 7821da177e4SLinus Torvalds int err = 0; 7831da177e4SLinus Torvalds 7841da177e4SLinus Torvalds /* This should really check to make sure 7851da177e4SLinus Torvalds * the socket is a TCP socket. (WHY AC...) 7861da177e4SLinus Torvalds */ 7871da177e4SLinus Torvalds how++; /* maps 0->1 has the advantage of making bit 1 rcvs and 7881da177e4SLinus Torvalds 1->2 bit 2 snds. 7891da177e4SLinus Torvalds 2->3 */ 7901da177e4SLinus Torvalds if ((how & ~SHUTDOWN_MASK) || !how) /* MAXINT->0 */ 7911da177e4SLinus Torvalds return -EINVAL; 7921da177e4SLinus Torvalds 7931da177e4SLinus Torvalds lock_sock(sk); 7941da177e4SLinus Torvalds if (sock->state == SS_CONNECTING) { 7951da177e4SLinus Torvalds if ((1 << sk->sk_state) & 7961da177e4SLinus Torvalds (TCPF_SYN_SENT | TCPF_SYN_RECV | TCPF_CLOSE)) 7971da177e4SLinus Torvalds sock->state = SS_DISCONNECTING; 7981da177e4SLinus Torvalds else 7991da177e4SLinus Torvalds sock->state = SS_CONNECTED; 8001da177e4SLinus Torvalds } 8011da177e4SLinus Torvalds 8021da177e4SLinus Torvalds switch (sk->sk_state) { 8031da177e4SLinus Torvalds case TCP_CLOSE: 8041da177e4SLinus Torvalds err = -ENOTCONN; 8051da177e4SLinus Torvalds /* Hack to wake up other listeners, who can poll for 8061da177e4SLinus Torvalds POLLHUP, even on eg. unconnected UDP sockets -- RR */ 8071da177e4SLinus Torvalds default: 8081da177e4SLinus Torvalds sk->sk_shutdown |= how; 8091da177e4SLinus Torvalds if (sk->sk_prot->shutdown) 8101da177e4SLinus Torvalds sk->sk_prot->shutdown(sk, how); 8111da177e4SLinus Torvalds break; 8121da177e4SLinus Torvalds 8131da177e4SLinus Torvalds /* Remaining two branches are temporary solution for missing 8141da177e4SLinus Torvalds * close() in multithreaded environment. It is _not_ a good idea, 8151da177e4SLinus Torvalds * but we have no choice until close() is repaired at VFS level. 8161da177e4SLinus Torvalds */ 8171da177e4SLinus Torvalds case TCP_LISTEN: 8181da177e4SLinus Torvalds if (!(how & RCV_SHUTDOWN)) 8191da177e4SLinus Torvalds break; 8201da177e4SLinus Torvalds /* Fall through */ 8211da177e4SLinus Torvalds case TCP_SYN_SENT: 8221da177e4SLinus Torvalds err = sk->sk_prot->disconnect(sk, O_NONBLOCK); 8231da177e4SLinus Torvalds sock->state = err ? SS_DISCONNECTING : SS_UNCONNECTED; 8241da177e4SLinus Torvalds break; 8251da177e4SLinus Torvalds } 8261da177e4SLinus Torvalds 8271da177e4SLinus Torvalds /* Wake up anyone sleeping in poll. */ 8281da177e4SLinus Torvalds sk->sk_state_change(sk); 8291da177e4SLinus Torvalds release_sock(sk); 8301da177e4SLinus Torvalds return err; 8311da177e4SLinus Torvalds } 8323d1427f8SEric Dumazet EXPORT_SYMBOL(inet_shutdown); 8331da177e4SLinus Torvalds 8341da177e4SLinus Torvalds /* 8351da177e4SLinus Torvalds * ioctl() calls you can issue on an INET socket. Most of these are 8361da177e4SLinus Torvalds * device configuration and stuff and very rarely used. Some ioctls 8371da177e4SLinus Torvalds * pass on to the socket itself. 8381da177e4SLinus Torvalds * 8391da177e4SLinus Torvalds * NOTE: I like the idea of a module for the config stuff. ie ifconfig 8401da177e4SLinus Torvalds * loads the devconfigure module does its configuring and unloads it. 8411da177e4SLinus Torvalds * There's a good 20K of config code hanging around the kernel. 8421da177e4SLinus Torvalds */ 8431da177e4SLinus Torvalds 8441da177e4SLinus Torvalds int inet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 8451da177e4SLinus Torvalds { 8461da177e4SLinus Torvalds struct sock *sk = sock->sk; 8471da177e4SLinus Torvalds int err = 0; 8483b1e0a65SYOSHIFUJI Hideaki struct net *net = sock_net(sk); 8491da177e4SLinus Torvalds 8501da177e4SLinus Torvalds switch (cmd) { 8511da177e4SLinus Torvalds case SIOCGSTAMP: 8521da177e4SLinus Torvalds err = sock_get_timestamp(sk, (struct timeval __user *)arg); 8531da177e4SLinus Torvalds break; 854ae40eb1eSEric Dumazet case SIOCGSTAMPNS: 855ae40eb1eSEric Dumazet err = sock_get_timestampns(sk, (struct timespec __user *)arg); 856ae40eb1eSEric Dumazet break; 8571da177e4SLinus Torvalds case SIOCADDRT: 8581da177e4SLinus Torvalds case SIOCDELRT: 8591da177e4SLinus Torvalds case SIOCRTMSG: 860e5b13cb1SDenis V. Lunev err = ip_rt_ioctl(net, cmd, (void __user *)arg); 8611da177e4SLinus Torvalds break; 8621da177e4SLinus Torvalds case SIOCDARP: 8631da177e4SLinus Torvalds case SIOCGARP: 8641da177e4SLinus Torvalds case SIOCSARP: 865e5b13cb1SDenis V. Lunev err = arp_ioctl(net, cmd, (void __user *)arg); 8661da177e4SLinus Torvalds break; 8671da177e4SLinus Torvalds case SIOCGIFADDR: 8681da177e4SLinus Torvalds case SIOCSIFADDR: 8691da177e4SLinus Torvalds case SIOCGIFBRDADDR: 8701da177e4SLinus Torvalds case SIOCSIFBRDADDR: 8711da177e4SLinus Torvalds case SIOCGIFNETMASK: 8721da177e4SLinus Torvalds case SIOCSIFNETMASK: 8731da177e4SLinus Torvalds case SIOCGIFDSTADDR: 8741da177e4SLinus Torvalds case SIOCSIFDSTADDR: 8751da177e4SLinus Torvalds case SIOCSIFPFLAGS: 8761da177e4SLinus Torvalds case SIOCGIFPFLAGS: 8771da177e4SLinus Torvalds case SIOCSIFFLAGS: 878e5b13cb1SDenis V. Lunev err = devinet_ioctl(net, cmd, (void __user *)arg); 8791da177e4SLinus Torvalds break; 8801da177e4SLinus Torvalds default: 881b5e5fa5eSChristoph Hellwig if (sk->sk_prot->ioctl) 882b5e5fa5eSChristoph Hellwig err = sk->sk_prot->ioctl(sk, cmd, arg); 883b5e5fa5eSChristoph Hellwig else 884b5e5fa5eSChristoph Hellwig err = -ENOIOCTLCMD; 8851da177e4SLinus Torvalds break; 8861da177e4SLinus Torvalds } 8871da177e4SLinus Torvalds return err; 8881da177e4SLinus Torvalds } 8893d1427f8SEric Dumazet EXPORT_SYMBOL(inet_ioctl); 8901da177e4SLinus Torvalds 891709b46e8SEric W. Biederman #ifdef CONFIG_COMPAT 892686dc6b6SGerrit Renker static int inet_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 893709b46e8SEric W. Biederman { 894709b46e8SEric W. Biederman struct sock *sk = sock->sk; 895709b46e8SEric W. Biederman int err = -ENOIOCTLCMD; 896709b46e8SEric W. Biederman 897709b46e8SEric W. Biederman if (sk->sk_prot->compat_ioctl) 898709b46e8SEric W. Biederman err = sk->sk_prot->compat_ioctl(sk, cmd, arg); 899709b46e8SEric W. Biederman 900709b46e8SEric W. Biederman return err; 901709b46e8SEric W. Biederman } 902709b46e8SEric W. Biederman #endif 903709b46e8SEric W. Biederman 90490ddc4f0SEric Dumazet const struct proto_ops inet_stream_ops = { 9051da177e4SLinus Torvalds .family = PF_INET, 9061da177e4SLinus Torvalds .owner = THIS_MODULE, 9071da177e4SLinus Torvalds .release = inet_release, 9081da177e4SLinus Torvalds .bind = inet_bind, 9091da177e4SLinus Torvalds .connect = inet_stream_connect, 9101da177e4SLinus Torvalds .socketpair = sock_no_socketpair, 9111da177e4SLinus Torvalds .accept = inet_accept, 9121da177e4SLinus Torvalds .getname = inet_getname, 9131da177e4SLinus Torvalds .poll = tcp_poll, 9141da177e4SLinus Torvalds .ioctl = inet_ioctl, 9151da177e4SLinus Torvalds .listen = inet_listen, 9161da177e4SLinus Torvalds .shutdown = inet_shutdown, 9171da177e4SLinus Torvalds .setsockopt = sock_common_setsockopt, 9181da177e4SLinus Torvalds .getsockopt = sock_common_getsockopt, 9197ba42910SChangli Gao .sendmsg = inet_sendmsg, 920fec5e652STom Herbert .recvmsg = inet_recvmsg, 921543d9cfeSArnaldo Carvalho de Melo .mmap = sock_no_mmap, 9227ba42910SChangli Gao .sendpage = inet_sendpage, 9239c55e01cSJens Axboe .splice_read = tcp_splice_read, 9243fdadf7dSDmitry Mishin #ifdef CONFIG_COMPAT 9253fdadf7dSDmitry Mishin .compat_setsockopt = compat_sock_common_setsockopt, 9263fdadf7dSDmitry Mishin .compat_getsockopt = compat_sock_common_getsockopt, 927709b46e8SEric W. Biederman .compat_ioctl = inet_compat_ioctl, 9283fdadf7dSDmitry Mishin #endif 9291da177e4SLinus Torvalds }; 9303d1427f8SEric Dumazet EXPORT_SYMBOL(inet_stream_ops); 9311da177e4SLinus Torvalds 93290ddc4f0SEric Dumazet const struct proto_ops inet_dgram_ops = { 9331da177e4SLinus Torvalds .family = PF_INET, 9341da177e4SLinus Torvalds .owner = THIS_MODULE, 9351da177e4SLinus Torvalds .release = inet_release, 9361da177e4SLinus Torvalds .bind = inet_bind, 9371da177e4SLinus Torvalds .connect = inet_dgram_connect, 9381da177e4SLinus Torvalds .socketpair = sock_no_socketpair, 9391da177e4SLinus Torvalds .accept = sock_no_accept, 9401da177e4SLinus Torvalds .getname = inet_getname, 9411da177e4SLinus Torvalds .poll = udp_poll, 9421da177e4SLinus Torvalds .ioctl = inet_ioctl, 9431da177e4SLinus Torvalds .listen = sock_no_listen, 9441da177e4SLinus Torvalds .shutdown = inet_shutdown, 9451da177e4SLinus Torvalds .setsockopt = sock_common_setsockopt, 9461da177e4SLinus Torvalds .getsockopt = sock_common_getsockopt, 9471da177e4SLinus Torvalds .sendmsg = inet_sendmsg, 948fec5e652STom Herbert .recvmsg = inet_recvmsg, 9491da177e4SLinus Torvalds .mmap = sock_no_mmap, 9501da177e4SLinus Torvalds .sendpage = inet_sendpage, 951543d9cfeSArnaldo Carvalho de Melo #ifdef CONFIG_COMPAT 952543d9cfeSArnaldo Carvalho de Melo .compat_setsockopt = compat_sock_common_setsockopt, 953543d9cfeSArnaldo Carvalho de Melo .compat_getsockopt = compat_sock_common_getsockopt, 954709b46e8SEric W. Biederman .compat_ioctl = inet_compat_ioctl, 955543d9cfeSArnaldo Carvalho de Melo #endif 9561da177e4SLinus Torvalds }; 9573d1427f8SEric Dumazet EXPORT_SYMBOL(inet_dgram_ops); 9581da177e4SLinus Torvalds 9591da177e4SLinus Torvalds /* 9601da177e4SLinus Torvalds * For SOCK_RAW sockets; should be the same as inet_dgram_ops but without 9611da177e4SLinus Torvalds * udp_poll 9621da177e4SLinus Torvalds */ 96390ddc4f0SEric Dumazet static const struct proto_ops inet_sockraw_ops = { 9641da177e4SLinus Torvalds .family = PF_INET, 9651da177e4SLinus Torvalds .owner = THIS_MODULE, 9661da177e4SLinus Torvalds .release = inet_release, 9671da177e4SLinus Torvalds .bind = inet_bind, 9681da177e4SLinus Torvalds .connect = inet_dgram_connect, 9691da177e4SLinus Torvalds .socketpair = sock_no_socketpair, 9701da177e4SLinus Torvalds .accept = sock_no_accept, 9711da177e4SLinus Torvalds .getname = inet_getname, 9721da177e4SLinus Torvalds .poll = datagram_poll, 9731da177e4SLinus Torvalds .ioctl = inet_ioctl, 9741da177e4SLinus Torvalds .listen = sock_no_listen, 9751da177e4SLinus Torvalds .shutdown = inet_shutdown, 9761da177e4SLinus Torvalds .setsockopt = sock_common_setsockopt, 9771da177e4SLinus Torvalds .getsockopt = sock_common_getsockopt, 9781da177e4SLinus Torvalds .sendmsg = inet_sendmsg, 979fec5e652STom Herbert .recvmsg = inet_recvmsg, 9801da177e4SLinus Torvalds .mmap = sock_no_mmap, 9811da177e4SLinus Torvalds .sendpage = inet_sendpage, 982543d9cfeSArnaldo Carvalho de Melo #ifdef CONFIG_COMPAT 983543d9cfeSArnaldo Carvalho de Melo .compat_setsockopt = compat_sock_common_setsockopt, 984543d9cfeSArnaldo Carvalho de Melo .compat_getsockopt = compat_sock_common_getsockopt, 985709b46e8SEric W. Biederman .compat_ioctl = inet_compat_ioctl, 986543d9cfeSArnaldo Carvalho de Melo #endif 9871da177e4SLinus Torvalds }; 9881da177e4SLinus Torvalds 989ec1b4cf7SStephen Hemminger static const struct net_proto_family inet_family_ops = { 9901da177e4SLinus Torvalds .family = PF_INET, 9911da177e4SLinus Torvalds .create = inet_create, 9921da177e4SLinus Torvalds .owner = THIS_MODULE, 9931da177e4SLinus Torvalds }; 9941da177e4SLinus Torvalds 9951da177e4SLinus Torvalds /* Upon startup we insert all the elements in inetsw_array[] into 9961da177e4SLinus Torvalds * the linked list inetsw. 9971da177e4SLinus Torvalds */ 9981da177e4SLinus Torvalds static struct inet_protosw inetsw_array[] = 9991da177e4SLinus Torvalds { 10001da177e4SLinus Torvalds { 10011da177e4SLinus Torvalds .type = SOCK_STREAM, 10021da177e4SLinus Torvalds .protocol = IPPROTO_TCP, 10031da177e4SLinus Torvalds .prot = &tcp_prot, 10041da177e4SLinus Torvalds .ops = &inet_stream_ops, 10051da177e4SLinus Torvalds .no_check = 0, 1006d83d8461SArnaldo Carvalho de Melo .flags = INET_PROTOSW_PERMANENT | 1007d83d8461SArnaldo Carvalho de Melo INET_PROTOSW_ICSK, 10081da177e4SLinus Torvalds }, 10091da177e4SLinus Torvalds 10101da177e4SLinus Torvalds { 10111da177e4SLinus Torvalds .type = SOCK_DGRAM, 10121da177e4SLinus Torvalds .protocol = IPPROTO_UDP, 10131da177e4SLinus Torvalds .prot = &udp_prot, 10141da177e4SLinus Torvalds .ops = &inet_dgram_ops, 10151da177e4SLinus Torvalds .no_check = UDP_CSUM_DEFAULT, 10161da177e4SLinus Torvalds .flags = INET_PROTOSW_PERMANENT, 10171da177e4SLinus Torvalds }, 10181da177e4SLinus Torvalds 1019c319b4d7SVasiliy Kulikov { 1020c319b4d7SVasiliy Kulikov .type = SOCK_DGRAM, 1021c319b4d7SVasiliy Kulikov .protocol = IPPROTO_ICMP, 1022c319b4d7SVasiliy Kulikov .prot = &ping_prot, 1023c319b4d7SVasiliy Kulikov .ops = &inet_dgram_ops, 1024c319b4d7SVasiliy Kulikov .no_check = UDP_CSUM_DEFAULT, 1025c319b4d7SVasiliy Kulikov .flags = INET_PROTOSW_REUSE, 1026c319b4d7SVasiliy Kulikov }, 10271da177e4SLinus Torvalds 10281da177e4SLinus Torvalds { 10291da177e4SLinus Torvalds .type = SOCK_RAW, 10301da177e4SLinus Torvalds .protocol = IPPROTO_IP, /* wild card */ 10311da177e4SLinus Torvalds .prot = &raw_prot, 10321da177e4SLinus Torvalds .ops = &inet_sockraw_ops, 10331da177e4SLinus Torvalds .no_check = UDP_CSUM_DEFAULT, 10341da177e4SLinus Torvalds .flags = INET_PROTOSW_REUSE, 10351da177e4SLinus Torvalds } 10361da177e4SLinus Torvalds }; 10371da177e4SLinus Torvalds 1038c40f6fffSDenis Cheng #define INETSW_ARRAY_LEN ARRAY_SIZE(inetsw_array) 10391da177e4SLinus Torvalds 10401da177e4SLinus Torvalds void inet_register_protosw(struct inet_protosw *p) 10411da177e4SLinus Torvalds { 10421da177e4SLinus Torvalds struct list_head *lh; 10431da177e4SLinus Torvalds struct inet_protosw *answer; 10441da177e4SLinus Torvalds int protocol = p->protocol; 10451da177e4SLinus Torvalds struct list_head *last_perm; 10461da177e4SLinus Torvalds 10471da177e4SLinus Torvalds spin_lock_bh(&inetsw_lock); 10481da177e4SLinus Torvalds 10491da177e4SLinus Torvalds if (p->type >= SOCK_MAX) 10501da177e4SLinus Torvalds goto out_illegal; 10511da177e4SLinus Torvalds 10521da177e4SLinus Torvalds /* If we are trying to override a permanent protocol, bail. */ 10531da177e4SLinus Torvalds answer = NULL; 10541da177e4SLinus Torvalds last_perm = &inetsw[p->type]; 10551da177e4SLinus Torvalds list_for_each(lh, &inetsw[p->type]) { 10561da177e4SLinus Torvalds answer = list_entry(lh, struct inet_protosw, list); 10571da177e4SLinus Torvalds 10581da177e4SLinus Torvalds /* Check only the non-wild match. */ 10591da177e4SLinus Torvalds if (INET_PROTOSW_PERMANENT & answer->flags) { 10601da177e4SLinus Torvalds if (protocol == answer->protocol) 10611da177e4SLinus Torvalds break; 10621da177e4SLinus Torvalds last_perm = lh; 10631da177e4SLinus Torvalds } 10641da177e4SLinus Torvalds 10651da177e4SLinus Torvalds answer = NULL; 10661da177e4SLinus Torvalds } 10671da177e4SLinus Torvalds if (answer) 10681da177e4SLinus Torvalds goto out_permanent; 10691da177e4SLinus Torvalds 10701da177e4SLinus Torvalds /* Add the new entry after the last permanent entry if any, so that 10711da177e4SLinus Torvalds * the new entry does not override a permanent entry when matched with 10721da177e4SLinus Torvalds * a wild-card protocol. But it is allowed to override any existing 10731da177e4SLinus Torvalds * non-permanent entry. This means that when we remove this entry, the 10741da177e4SLinus Torvalds * system automatically returns to the old behavior. 10751da177e4SLinus Torvalds */ 10761da177e4SLinus Torvalds list_add_rcu(&p->list, last_perm); 10771da177e4SLinus Torvalds out: 10781da177e4SLinus Torvalds spin_unlock_bh(&inetsw_lock); 10791da177e4SLinus Torvalds 10801da177e4SLinus Torvalds return; 10811da177e4SLinus Torvalds 10821da177e4SLinus Torvalds out_permanent: 1083058bd4d2SJoe Perches pr_err("Attempt to override permanent protocol %d\n", protocol); 10841da177e4SLinus Torvalds goto out; 10851da177e4SLinus Torvalds 10861da177e4SLinus Torvalds out_illegal: 1087058bd4d2SJoe Perches pr_err("Ignoring attempt to register invalid socket type %d\n", 10881da177e4SLinus Torvalds p->type); 10891da177e4SLinus Torvalds goto out; 10901da177e4SLinus Torvalds } 10913d1427f8SEric Dumazet EXPORT_SYMBOL(inet_register_protosw); 10921da177e4SLinus Torvalds 10931da177e4SLinus Torvalds void inet_unregister_protosw(struct inet_protosw *p) 10941da177e4SLinus Torvalds { 10951da177e4SLinus Torvalds if (INET_PROTOSW_PERMANENT & p->flags) { 1096058bd4d2SJoe Perches pr_err("Attempt to unregister permanent protocol %d\n", 10971da177e4SLinus Torvalds p->protocol); 10981da177e4SLinus Torvalds } else { 10991da177e4SLinus Torvalds spin_lock_bh(&inetsw_lock); 11001da177e4SLinus Torvalds list_del_rcu(&p->list); 11011da177e4SLinus Torvalds spin_unlock_bh(&inetsw_lock); 11021da177e4SLinus Torvalds 11031da177e4SLinus Torvalds synchronize_net(); 11041da177e4SLinus Torvalds } 11051da177e4SLinus Torvalds } 11063d1427f8SEric Dumazet EXPORT_SYMBOL(inet_unregister_protosw); 11071da177e4SLinus Torvalds 110832519f11SArnaldo Carvalho de Melo /* 110932519f11SArnaldo Carvalho de Melo * Shall we try to damage output packets if routing dev changes? 111032519f11SArnaldo Carvalho de Melo */ 111132519f11SArnaldo Carvalho de Melo 1112ab32ea5dSBrian Haley int sysctl_ip_dynaddr __read_mostly; 111332519f11SArnaldo Carvalho de Melo 111432519f11SArnaldo Carvalho de Melo static int inet_sk_reselect_saddr(struct sock *sk) 111532519f11SArnaldo Carvalho de Melo { 111632519f11SArnaldo Carvalho de Melo struct inet_sock *inet = inet_sk(sk); 1117c720c7e8SEric Dumazet __be32 old_saddr = inet->inet_saddr; 1118c720c7e8SEric Dumazet __be32 daddr = inet->inet_daddr; 11196e869138SDavid S. Miller struct flowi4 *fl4; 1120b23dd4feSDavid S. Miller struct rtable *rt; 1121b23dd4feSDavid S. Miller __be32 new_saddr; 1122f6d8bd05SEric Dumazet struct ip_options_rcu *inet_opt; 112332519f11SArnaldo Carvalho de Melo 1124f6d8bd05SEric Dumazet inet_opt = rcu_dereference_protected(inet->inet_opt, 1125f6d8bd05SEric Dumazet sock_owned_by_user(sk)); 1126f6d8bd05SEric Dumazet if (inet_opt && inet_opt->opt.srr) 1127f6d8bd05SEric Dumazet daddr = inet_opt->opt.faddr; 112832519f11SArnaldo Carvalho de Melo 112932519f11SArnaldo Carvalho de Melo /* Query new route. */ 11306e869138SDavid S. Miller fl4 = &inet->cork.fl.u.ip4; 11316e869138SDavid S. Miller rt = ip_route_connect(fl4, daddr, 0, RT_CONN_FLAGS(sk), 1132b23dd4feSDavid S. Miller sk->sk_bound_dev_if, sk->sk_protocol, 11330e0d44abSSteffen Klassert inet->inet_sport, inet->inet_dport, sk); 1134b23dd4feSDavid S. Miller if (IS_ERR(rt)) 1135b23dd4feSDavid S. Miller return PTR_ERR(rt); 113632519f11SArnaldo Carvalho de Melo 1137d8d1f30bSChangli Gao sk_setup_caps(sk, &rt->dst); 113832519f11SArnaldo Carvalho de Melo 11396e869138SDavid S. Miller new_saddr = fl4->saddr; 114032519f11SArnaldo Carvalho de Melo 114132519f11SArnaldo Carvalho de Melo if (new_saddr == old_saddr) 114232519f11SArnaldo Carvalho de Melo return 0; 114332519f11SArnaldo Carvalho de Melo 114432519f11SArnaldo Carvalho de Melo if (sysctl_ip_dynaddr > 1) { 1145058bd4d2SJoe Perches pr_info("%s(): shifting inet->saddr from %pI4 to %pI4\n", 1146673d57e7SHarvey Harrison __func__, &old_saddr, &new_saddr); 114732519f11SArnaldo Carvalho de Melo } 114832519f11SArnaldo Carvalho de Melo 1149c720c7e8SEric Dumazet inet->inet_saddr = inet->inet_rcv_saddr = new_saddr; 115032519f11SArnaldo Carvalho de Melo 115132519f11SArnaldo Carvalho de Melo /* 115232519f11SArnaldo Carvalho de Melo * XXX The only one ugly spot where we need to 115332519f11SArnaldo Carvalho de Melo * XXX really change the sockets identity after 115432519f11SArnaldo Carvalho de Melo * XXX it has entered the hashes. -DaveM 115532519f11SArnaldo Carvalho de Melo * 115632519f11SArnaldo Carvalho de Melo * Besides that, it does not check for connection 115732519f11SArnaldo Carvalho de Melo * uniqueness. Wait for troubles. 115832519f11SArnaldo Carvalho de Melo */ 115932519f11SArnaldo Carvalho de Melo __sk_prot_rehash(sk); 116032519f11SArnaldo Carvalho de Melo return 0; 116132519f11SArnaldo Carvalho de Melo } 116232519f11SArnaldo Carvalho de Melo 116332519f11SArnaldo Carvalho de Melo int inet_sk_rebuild_header(struct sock *sk) 116432519f11SArnaldo Carvalho de Melo { 116532519f11SArnaldo Carvalho de Melo struct inet_sock *inet = inet_sk(sk); 116632519f11SArnaldo Carvalho de Melo struct rtable *rt = (struct rtable *)__sk_dst_check(sk, 0); 11673ca3c68eSAl Viro __be32 daddr; 1168f6d8bd05SEric Dumazet struct ip_options_rcu *inet_opt; 11696e869138SDavid S. Miller struct flowi4 *fl4; 117032519f11SArnaldo Carvalho de Melo int err; 117132519f11SArnaldo Carvalho de Melo 117232519f11SArnaldo Carvalho de Melo /* Route is OK, nothing to do. */ 117332519f11SArnaldo Carvalho de Melo if (rt) 117432519f11SArnaldo Carvalho de Melo return 0; 117532519f11SArnaldo Carvalho de Melo 117632519f11SArnaldo Carvalho de Melo /* Reroute. */ 1177f6d8bd05SEric Dumazet rcu_read_lock(); 1178f6d8bd05SEric Dumazet inet_opt = rcu_dereference(inet->inet_opt); 1179c720c7e8SEric Dumazet daddr = inet->inet_daddr; 1180f6d8bd05SEric Dumazet if (inet_opt && inet_opt->opt.srr) 1181f6d8bd05SEric Dumazet daddr = inet_opt->opt.faddr; 1182f6d8bd05SEric Dumazet rcu_read_unlock(); 11836e869138SDavid S. Miller fl4 = &inet->cork.fl.u.ip4; 11846e869138SDavid S. Miller rt = ip_route_output_ports(sock_net(sk), fl4, sk, daddr, inet->inet_saddr, 118578fbfd8aSDavid S. Miller inet->inet_dport, inet->inet_sport, 118678fbfd8aSDavid S. Miller sk->sk_protocol, RT_CONN_FLAGS(sk), 118778fbfd8aSDavid S. Miller sk->sk_bound_dev_if); 1188b23dd4feSDavid S. Miller if (!IS_ERR(rt)) { 1189b23dd4feSDavid S. Miller err = 0; 1190d8d1f30bSChangli Gao sk_setup_caps(sk, &rt->dst); 1191b23dd4feSDavid S. Miller } else { 1192b23dd4feSDavid S. Miller err = PTR_ERR(rt); 1193b23dd4feSDavid S. Miller 119432519f11SArnaldo Carvalho de Melo /* Routing failed... */ 119532519f11SArnaldo Carvalho de Melo sk->sk_route_caps = 0; 119632519f11SArnaldo Carvalho de Melo /* 119732519f11SArnaldo Carvalho de Melo * Other protocols have to map its equivalent state to TCP_SYN_SENT. 119832519f11SArnaldo Carvalho de Melo * DCCP maps its DCCP_REQUESTING state to TCP_SYN_SENT. -acme 119932519f11SArnaldo Carvalho de Melo */ 120032519f11SArnaldo Carvalho de Melo if (!sysctl_ip_dynaddr || 120132519f11SArnaldo Carvalho de Melo sk->sk_state != TCP_SYN_SENT || 120232519f11SArnaldo Carvalho de Melo (sk->sk_userlocks & SOCK_BINDADDR_LOCK) || 120332519f11SArnaldo Carvalho de Melo (err = inet_sk_reselect_saddr(sk)) != 0) 120432519f11SArnaldo Carvalho de Melo sk->sk_err_soft = -err; 120532519f11SArnaldo Carvalho de Melo } 120632519f11SArnaldo Carvalho de Melo 120732519f11SArnaldo Carvalho de Melo return err; 120832519f11SArnaldo Carvalho de Melo } 120932519f11SArnaldo Carvalho de Melo EXPORT_SYMBOL(inet_sk_rebuild_header); 121032519f11SArnaldo Carvalho de Melo 1211a430a43dSHerbert Xu static int inet_gso_send_check(struct sk_buff *skb) 1212a430a43dSHerbert Xu { 1213bca49f84SVlad Yasevich const struct net_offload *ops; 1214f9242b6bSDavid S. Miller const struct iphdr *iph; 1215a430a43dSHerbert Xu int proto; 1216a430a43dSHerbert Xu int ihl; 1217a430a43dSHerbert Xu int err = -EINVAL; 1218a430a43dSHerbert Xu 1219a430a43dSHerbert Xu if (unlikely(!pskb_may_pull(skb, sizeof(*iph)))) 1220a430a43dSHerbert Xu goto out; 1221a430a43dSHerbert Xu 1222eddc9ec5SArnaldo Carvalho de Melo iph = ip_hdr(skb); 1223a430a43dSHerbert Xu ihl = iph->ihl * 4; 1224a430a43dSHerbert Xu if (ihl < sizeof(*iph)) 1225a430a43dSHerbert Xu goto out; 1226a430a43dSHerbert Xu 122747d27aadSEric Dumazet proto = iph->protocol; 122847d27aadSEric Dumazet 122947d27aadSEric Dumazet /* Warning: after this point, iph might be no longer valid */ 1230a430a43dSHerbert Xu if (unlikely(!pskb_may_pull(skb, ihl))) 1231a430a43dSHerbert Xu goto out; 1232badff6d0SArnaldo Carvalho de Melo __skb_pull(skb, ihl); 123347d27aadSEric Dumazet 1234badff6d0SArnaldo Carvalho de Melo skb_reset_transport_header(skb); 1235a430a43dSHerbert Xu err = -EPROTONOSUPPORT; 1236a430a43dSHerbert Xu 1237bca49f84SVlad Yasevich ops = rcu_dereference(inet_offloads[proto]); 1238f191a1d1SVlad Yasevich if (likely(ops && ops->callbacks.gso_send_check)) 1239f191a1d1SVlad Yasevich err = ops->callbacks.gso_send_check(skb); 1240a430a43dSHerbert Xu 1241a430a43dSHerbert Xu out: 1242a430a43dSHerbert Xu return err; 1243a430a43dSHerbert Xu } 1244a430a43dSHerbert Xu 1245c8f44affSMichał Mirosław static struct sk_buff *inet_gso_segment(struct sk_buff *skb, 1246c8f44affSMichał Mirosław netdev_features_t features) 1247f4c50d99SHerbert Xu { 1248f4c50d99SHerbert Xu struct sk_buff *segs = ERR_PTR(-EINVAL); 1249bca49f84SVlad Yasevich const struct net_offload *ops; 12503347c960SEric Dumazet unsigned int offset = 0; 12518c3a897bSEric Dumazet bool udpfrag, encap; 1252f9242b6bSDavid S. Miller struct iphdr *iph; 1253f4c50d99SHerbert Xu int proto; 12543347c960SEric Dumazet int nhoff; 1255f4c50d99SHerbert Xu int ihl; 1256f4c50d99SHerbert Xu int id; 1257f4c50d99SHerbert Xu 1258bbcf467dSHerbert Xu if (unlikely(skb_shinfo(skb)->gso_type & 1259bbcf467dSHerbert Xu ~(SKB_GSO_TCPV4 | 1260bbcf467dSHerbert Xu SKB_GSO_UDP | 1261bbcf467dSHerbert Xu SKB_GSO_DODGY | 1262bbcf467dSHerbert Xu SKB_GSO_TCP_ECN | 126368c33163SPravin B Shelar SKB_GSO_GRE | 1264cb32f511SEric Dumazet SKB_GSO_IPIP | 126561c1db7fSEric Dumazet SKB_GSO_SIT | 12669b3eb5edSPravin B Shelar SKB_GSO_TCPV6 | 126773136267SPravin B Shelar SKB_GSO_UDP_TUNNEL | 12680d89d203SSimon Horman SKB_GSO_MPLS | 1269bbcf467dSHerbert Xu 0))) 1270bbcf467dSHerbert Xu goto out; 1271bbcf467dSHerbert Xu 12723347c960SEric Dumazet skb_reset_network_header(skb); 12733347c960SEric Dumazet nhoff = skb_network_header(skb) - skb_mac_header(skb); 1274bbcf467dSHerbert Xu if (unlikely(!pskb_may_pull(skb, sizeof(*iph)))) 1275f4c50d99SHerbert Xu goto out; 1276f4c50d99SHerbert Xu 1277eddc9ec5SArnaldo Carvalho de Melo iph = ip_hdr(skb); 1278f4c50d99SHerbert Xu ihl = iph->ihl * 4; 1279f4c50d99SHerbert Xu if (ihl < sizeof(*iph)) 1280f4c50d99SHerbert Xu goto out; 1281f4c50d99SHerbert Xu 128247d27aadSEric Dumazet id = ntohs(iph->id); 128347d27aadSEric Dumazet proto = iph->protocol; 128447d27aadSEric Dumazet 128547d27aadSEric Dumazet /* Warning: after this point, iph might be no longer valid */ 1286bbcf467dSHerbert Xu if (unlikely(!pskb_may_pull(skb, ihl))) 1287f4c50d99SHerbert Xu goto out; 128847d27aadSEric Dumazet __skb_pull(skb, ihl); 1289f4c50d99SHerbert Xu 12908c3a897bSEric Dumazet encap = SKB_GSO_CB(skb)->encap_level > 0; 12918c3a897bSEric Dumazet if (encap) 12923347c960SEric Dumazet features = skb->dev->hw_enc_features & netif_skb_features(skb); 12933347c960SEric Dumazet SKB_GSO_CB(skb)->encap_level += ihl; 129473136267SPravin B Shelar 1295badff6d0SArnaldo Carvalho de Melo skb_reset_transport_header(skb); 129647d27aadSEric Dumazet 1297f4c50d99SHerbert Xu segs = ERR_PTR(-EPROTONOSUPPORT); 1298f4c50d99SHerbert Xu 129991a48a2eSHannes Frederic Sowa if (skb->encapsulation && 130091a48a2eSHannes Frederic Sowa skb_shinfo(skb)->gso_type & (SKB_GSO_SIT|SKB_GSO_IPIP)) 130191a48a2eSHannes Frederic Sowa udpfrag = proto == IPPROTO_UDP && encap; 130291a48a2eSHannes Frederic Sowa else 130391a48a2eSHannes Frederic Sowa udpfrag = proto == IPPROTO_UDP && !skb->encapsulation; 1304dcd60771SEric Dumazet 1305bca49f84SVlad Yasevich ops = rcu_dereference(inet_offloads[proto]); 1306f191a1d1SVlad Yasevich if (likely(ops && ops->callbacks.gso_segment)) 1307f191a1d1SVlad Yasevich segs = ops->callbacks.gso_segment(skb, features); 1308f4c50d99SHerbert Xu 130950c3a487SYOSHIFUJI Hideaki / 吉藤英明 if (IS_ERR_OR_NULL(segs)) 1310f4c50d99SHerbert Xu goto out; 1311f4c50d99SHerbert Xu 1312f4c50d99SHerbert Xu skb = segs; 1313f4c50d99SHerbert Xu do { 13143347c960SEric Dumazet iph = (struct iphdr *)(skb_mac_header(skb) + nhoff); 13158c3a897bSEric Dumazet if (udpfrag) { 1316d7ca4cc0SSridhar Samudrala iph->id = htons(id); 1317d7ca4cc0SSridhar Samudrala iph->frag_off = htons(offset >> 3); 1318d7ca4cc0SSridhar Samudrala if (skb->next != NULL) 1319d7ca4cc0SSridhar Samudrala iph->frag_off |= htons(IP_MF); 13203347c960SEric Dumazet offset += skb->len - nhoff - ihl; 1321490ab081SPravin B Shelar } else { 1322f4c50d99SHerbert Xu iph->id = htons(id++); 1323490ab081SPravin B Shelar } 13243347c960SEric Dumazet iph->tot_len = htons(skb->len - nhoff); 132547d27aadSEric Dumazet ip_send_check(iph); 13268c3a897bSEric Dumazet if (encap) 13273347c960SEric Dumazet skb_reset_inner_headers(skb); 13283347c960SEric Dumazet skb->network_header = (u8 *)iph - skb->head; 1329f4c50d99SHerbert Xu } while ((skb = skb->next)); 1330f4c50d99SHerbert Xu 1331f4c50d99SHerbert Xu out: 1332f4c50d99SHerbert Xu return segs; 1333f4c50d99SHerbert Xu } 1334f4c50d99SHerbert Xu 133573cc19f1SHerbert Xu static struct sk_buff **inet_gro_receive(struct sk_buff **head, 133673cc19f1SHerbert Xu struct sk_buff *skb) 133773cc19f1SHerbert Xu { 1338bca49f84SVlad Yasevich const struct net_offload *ops; 133973cc19f1SHerbert Xu struct sk_buff **pp = NULL; 134073cc19f1SHerbert Xu struct sk_buff *p; 1341b71d1d42SEric Dumazet const struct iphdr *iph; 1342a5b1cf28SHerbert Xu unsigned int hlen; 1343a5b1cf28SHerbert Xu unsigned int off; 13441075f3f6SHerbert Xu unsigned int id; 134573cc19f1SHerbert Xu int flush = 1; 134673cc19f1SHerbert Xu int proto; 134773cc19f1SHerbert Xu 1348a5b1cf28SHerbert Xu off = skb_gro_offset(skb); 1349a5b1cf28SHerbert Xu hlen = off + sizeof(*iph); 1350a5b1cf28SHerbert Xu iph = skb_gro_header_fast(skb, off); 1351a5b1cf28SHerbert Xu if (skb_gro_header_hard(skb, hlen)) { 1352a5b1cf28SHerbert Xu iph = skb_gro_header_slow(skb, hlen, off); 135386911732SHerbert Xu if (unlikely(!iph)) 135473cc19f1SHerbert Xu goto out; 1355a5b1cf28SHerbert Xu } 135673cc19f1SHerbert Xu 1357f9242b6bSDavid S. Miller proto = iph->protocol; 135873cc19f1SHerbert Xu 135973cc19f1SHerbert Xu rcu_read_lock(); 1360bca49f84SVlad Yasevich ops = rcu_dereference(inet_offloads[proto]); 1361f191a1d1SVlad Yasevich if (!ops || !ops->callbacks.gro_receive) 136273cc19f1SHerbert Xu goto out_unlock; 136373cc19f1SHerbert Xu 1364a5ad24beSHerbert Xu if (*(u8 *)iph != 0x45) 136573cc19f1SHerbert Xu goto out_unlock; 136673cc19f1SHerbert Xu 1367a9e050f4SEric Dumazet if (unlikely(ip_fast_csum((u8 *)iph, 5))) 136873cc19f1SHerbert Xu goto out_unlock; 136973cc19f1SHerbert Xu 13700eae88f3SEric Dumazet id = ntohl(*(__be32 *)&iph->id); 1371db8caf3dSEric Dumazet flush = (u16)((ntohl(*(__be32 *)iph) ^ skb_gro_len(skb)) | (id & ~IP_DF)); 13721075f3f6SHerbert Xu id >>= 16; 137373cc19f1SHerbert Xu 137473cc19f1SHerbert Xu for (p = *head; p; p = p->next) { 137573cc19f1SHerbert Xu struct iphdr *iph2; 137673cc19f1SHerbert Xu 137773cc19f1SHerbert Xu if (!NAPI_GRO_CB(p)->same_flow) 137873cc19f1SHerbert Xu continue; 137973cc19f1SHerbert Xu 1380299603e8SJerry Chu iph2 = (struct iphdr *)(p->data + off); 1381299603e8SJerry Chu /* The above works because, with the exception of the top 1382299603e8SJerry Chu * (inner most) layer, we only aggregate pkts with the same 1383299603e8SJerry Chu * hdr length so all the hdrs we'll need to verify will start 1384299603e8SJerry Chu * at the same offset. 1385299603e8SJerry Chu */ 1386a5ad24beSHerbert Xu if ((iph->protocol ^ iph2->protocol) | 13870eae88f3SEric Dumazet ((__force u32)iph->saddr ^ (__force u32)iph2->saddr) | 13880eae88f3SEric Dumazet ((__force u32)iph->daddr ^ (__force u32)iph2->daddr)) { 138973cc19f1SHerbert Xu NAPI_GRO_CB(p)->same_flow = 0; 139073cc19f1SHerbert Xu continue; 139173cc19f1SHerbert Xu } 139273cc19f1SHerbert Xu 139373cc19f1SHerbert Xu /* All fields must match except length and checksum. */ 139473cc19f1SHerbert Xu NAPI_GRO_CB(p)->flush |= 1395a5ad24beSHerbert Xu (iph->ttl ^ iph2->ttl) | 1396a9e050f4SEric Dumazet (iph->tos ^ iph2->tos) | 1397bf5a755fSJerry Chu ((iph->frag_off ^ iph2->frag_off) & htons(IP_DF)); 139873cc19f1SHerbert Xu 1399bf5a755fSJerry Chu /* Save the IP ID check to be included later when we get to 1400bf5a755fSJerry Chu * the transport layer so only the inner most IP ID is checked. 1401bf5a755fSJerry Chu * This is because some GSO/TSO implementations do not 1402bf5a755fSJerry Chu * correctly increment the IP ID for the outer hdrs. 1403bf5a755fSJerry Chu */ 1404bf5a755fSJerry Chu NAPI_GRO_CB(p)->flush_id = 1405bf5a755fSJerry Chu ((u16)(ntohs(iph2->id) + NAPI_GRO_CB(p)->count) ^ id); 140673cc19f1SHerbert Xu NAPI_GRO_CB(p)->flush |= flush; 140773cc19f1SHerbert Xu } 140873cc19f1SHerbert Xu 140973cc19f1SHerbert Xu NAPI_GRO_CB(skb)->flush |= flush; 1410299603e8SJerry Chu skb_set_network_header(skb, off); 1411299603e8SJerry Chu /* The above will be needed by the transport layer if there is one 1412299603e8SJerry Chu * immediately following this IP hdr. 1413299603e8SJerry Chu */ 1414299603e8SJerry Chu 141586911732SHerbert Xu skb_gro_pull(skb, sizeof(*iph)); 141686911732SHerbert Xu skb_set_transport_header(skb, skb_gro_offset(skb)); 141773cc19f1SHerbert Xu 1418f191a1d1SVlad Yasevich pp = ops->callbacks.gro_receive(head, skb); 141973cc19f1SHerbert Xu 142073cc19f1SHerbert Xu out_unlock: 142173cc19f1SHerbert Xu rcu_read_unlock(); 142273cc19f1SHerbert Xu 142373cc19f1SHerbert Xu out: 142473cc19f1SHerbert Xu NAPI_GRO_CB(skb)->flush |= flush; 142573cc19f1SHerbert Xu 142673cc19f1SHerbert Xu return pp; 142773cc19f1SHerbert Xu } 142873cc19f1SHerbert Xu 1429299603e8SJerry Chu static int inet_gro_complete(struct sk_buff *skb, int nhoff) 143073cc19f1SHerbert Xu { 1431299603e8SJerry Chu __be16 newlen = htons(skb->len - nhoff); 1432299603e8SJerry Chu struct iphdr *iph = (struct iphdr *)(skb->data + nhoff); 1433bca49f84SVlad Yasevich const struct net_offload *ops; 1434f9242b6bSDavid S. Miller int proto = iph->protocol; 1435f9242b6bSDavid S. Miller int err = -ENOSYS; 143673cc19f1SHerbert Xu 143773cc19f1SHerbert Xu csum_replace2(&iph->check, iph->tot_len, newlen); 143873cc19f1SHerbert Xu iph->tot_len = newlen; 143973cc19f1SHerbert Xu 144073cc19f1SHerbert Xu rcu_read_lock(); 1441bca49f84SVlad Yasevich ops = rcu_dereference(inet_offloads[proto]); 1442f191a1d1SVlad Yasevich if (WARN_ON(!ops || !ops->callbacks.gro_complete)) 144373cc19f1SHerbert Xu goto out_unlock; 144473cc19f1SHerbert Xu 1445299603e8SJerry Chu /* Only need to add sizeof(*iph) to get to the next hdr below 1446299603e8SJerry Chu * because any hdr with option will have been flushed in 1447299603e8SJerry Chu * inet_gro_receive(). 1448299603e8SJerry Chu */ 1449299603e8SJerry Chu err = ops->callbacks.gro_complete(skb, nhoff + sizeof(*iph)); 145073cc19f1SHerbert Xu 145173cc19f1SHerbert Xu out_unlock: 145273cc19f1SHerbert Xu rcu_read_unlock(); 145373cc19f1SHerbert Xu 145473cc19f1SHerbert Xu return err; 145573cc19f1SHerbert Xu } 145673cc19f1SHerbert Xu 1457eee4fe4dSDenis V. Lunev int inet_ctl_sock_create(struct sock **sk, unsigned short family, 14585677242fSDenis V. Lunev unsigned short type, unsigned char protocol, 14595677242fSDenis V. Lunev struct net *net) 14603d58b5faSDenis V. Lunev { 1461eee4fe4dSDenis V. Lunev struct socket *sock; 1462eee4fe4dSDenis V. Lunev int rc = sock_create_kern(family, type, protocol, &sock); 14633d58b5faSDenis V. Lunev 14643d58b5faSDenis V. Lunev if (rc == 0) { 1465eee4fe4dSDenis V. Lunev *sk = sock->sk; 1466eee4fe4dSDenis V. Lunev (*sk)->sk_allocation = GFP_ATOMIC; 14673d58b5faSDenis V. Lunev /* 14683d58b5faSDenis V. Lunev * Unhash it so that IP input processing does not even see it, 14693d58b5faSDenis V. Lunev * we do not wish this socket to see incoming packets. 14703d58b5faSDenis V. Lunev */ 1471eee4fe4dSDenis V. Lunev (*sk)->sk_prot->unhash(*sk); 14725677242fSDenis V. Lunev 14735677242fSDenis V. Lunev sk_change_net(*sk, net); 14743d58b5faSDenis V. Lunev } 14753d58b5faSDenis V. Lunev return rc; 14763d58b5faSDenis V. Lunev } 14773d58b5faSDenis V. Lunev EXPORT_SYMBOL_GPL(inet_ctl_sock_create); 14783d58b5faSDenis V. Lunev 14797d720c3eSTejun Heo unsigned long snmp_fold_field(void __percpu *mib[], int offt) 14805e0f0435SHerbert Xu { 14815e0f0435SHerbert Xu unsigned long res = 0; 14828f0ea0feSEric Dumazet int i, j; 14835e0f0435SHerbert Xu 14845e0f0435SHerbert Xu for_each_possible_cpu(i) { 14858f0ea0feSEric Dumazet for (j = 0; j < SNMP_ARRAY_SZ; j++) 14868f0ea0feSEric Dumazet res += *(((unsigned long *) per_cpu_ptr(mib[j], i)) + offt); 14875e0f0435SHerbert Xu } 14885e0f0435SHerbert Xu return res; 14895e0f0435SHerbert Xu } 14905e0f0435SHerbert Xu EXPORT_SYMBOL_GPL(snmp_fold_field); 14915e0f0435SHerbert Xu 14924ce3c183SEric Dumazet #if BITS_PER_LONG==32 14934ce3c183SEric Dumazet 14944ce3c183SEric Dumazet u64 snmp_fold_field64(void __percpu *mib[], int offt, size_t syncp_offset) 14954ce3c183SEric Dumazet { 14964ce3c183SEric Dumazet u64 res = 0; 14974ce3c183SEric Dumazet int cpu; 14984ce3c183SEric Dumazet 14994ce3c183SEric Dumazet for_each_possible_cpu(cpu) { 15008f0ea0feSEric Dumazet void *bhptr; 15014ce3c183SEric Dumazet struct u64_stats_sync *syncp; 15028f0ea0feSEric Dumazet u64 v; 15034ce3c183SEric Dumazet unsigned int start; 15044ce3c183SEric Dumazet 15058f0ea0feSEric Dumazet bhptr = per_cpu_ptr(mib[0], cpu); 15064ce3c183SEric Dumazet syncp = (struct u64_stats_sync *)(bhptr + syncp_offset); 15074ce3c183SEric Dumazet do { 15084ce3c183SEric Dumazet start = u64_stats_fetch_begin_bh(syncp); 15098f0ea0feSEric Dumazet v = *(((u64 *) bhptr) + offt); 15104ce3c183SEric Dumazet } while (u64_stats_fetch_retry_bh(syncp, start)); 15114ce3c183SEric Dumazet 15128f0ea0feSEric Dumazet res += v; 15134ce3c183SEric Dumazet } 15144ce3c183SEric Dumazet return res; 15154ce3c183SEric Dumazet } 15164ce3c183SEric Dumazet EXPORT_SYMBOL_GPL(snmp_fold_field64); 15174ce3c183SEric Dumazet #endif 15184ce3c183SEric Dumazet 15191823e4c8SEric Dumazet int snmp_mib_init(void __percpu *ptr[2], size_t mibsize, size_t align) 15205e0f0435SHerbert Xu { 15215e0f0435SHerbert Xu BUG_ON(ptr == NULL); 15221823e4c8SEric Dumazet ptr[0] = __alloc_percpu(mibsize, align); 15235e0f0435SHerbert Xu if (!ptr[0]) 15248f0ea0feSEric Dumazet return -ENOMEM; 1525827da44cSJohn Stultz 15268f0ea0feSEric Dumazet #if SNMP_ARRAY_SZ == 2 15271823e4c8SEric Dumazet ptr[1] = __alloc_percpu(mibsize, align); 15288f0ea0feSEric Dumazet if (!ptr[1]) { 15295e0f0435SHerbert Xu free_percpu(ptr[0]); 15305e0f0435SHerbert Xu ptr[0] = NULL; 15315e0f0435SHerbert Xu return -ENOMEM; 15325e0f0435SHerbert Xu } 15338f0ea0feSEric Dumazet #endif 15348f0ea0feSEric Dumazet return 0; 15358f0ea0feSEric Dumazet } 15365e0f0435SHerbert Xu EXPORT_SYMBOL_GPL(snmp_mib_init); 15375e0f0435SHerbert Xu 15381da177e4SLinus Torvalds #ifdef CONFIG_IP_MULTICAST 153932613090SAlexey Dobriyan static const struct net_protocol igmp_protocol = { 15401da177e4SLinus Torvalds .handler = igmp_rcv, 1541b4ee07dfSAlexey Dobriyan .netns_ok = 1, 15421da177e4SLinus Torvalds }; 15431da177e4SLinus Torvalds #endif 15441da177e4SLinus Torvalds 154532613090SAlexey Dobriyan static const struct net_protocol tcp_protocol = { 154641063e9dSDavid S. Miller .early_demux = tcp_v4_early_demux, 15471da177e4SLinus Torvalds .handler = tcp_v4_rcv, 15481da177e4SLinus Torvalds .err_handler = tcp_v4_err, 15491da177e4SLinus Torvalds .no_policy = 1, 155092f1fecbSDenis V. Lunev .netns_ok = 1, 15518ed1dc44SHannes Frederic Sowa .icmp_strict_tag_validation = 1, 15521da177e4SLinus Torvalds }; 15531da177e4SLinus Torvalds 155432613090SAlexey Dobriyan static const struct net_protocol udp_protocol = { 1555421b3885SShawn Bohrer .early_demux = udp_v4_early_demux, 15561da177e4SLinus Torvalds .handler = udp_rcv, 15571da177e4SLinus Torvalds .err_handler = udp_err, 15581da177e4SLinus Torvalds .no_policy = 1, 155992f1fecbSDenis V. Lunev .netns_ok = 1, 15601da177e4SLinus Torvalds }; 15611da177e4SLinus Torvalds 156232613090SAlexey Dobriyan static const struct net_protocol icmp_protocol = { 15631da177e4SLinus Torvalds .handler = icmp_rcv, 15645b052042SLi Wei .err_handler = icmp_err, 15658b7817f3SHerbert Xu .no_policy = 1, 156692f1fecbSDenis V. Lunev .netns_ok = 1, 15671da177e4SLinus Torvalds }; 15681da177e4SLinus Torvalds 15699b4661bdSPavel Emelyanov static __net_init int ipv4_mib_init_net(struct net *net) 15709b4661bdSPavel Emelyanov { 1571827da44cSJohn Stultz int i; 1572827da44cSJohn Stultz 15737d720c3eSTejun Heo if (snmp_mib_init((void __percpu **)net->mib.tcp_statistics, 15741823e4c8SEric Dumazet sizeof(struct tcp_mib), 15751823e4c8SEric Dumazet __alignof__(struct tcp_mib)) < 0) 157657ef42d5SPavel Emelyanov goto err_tcp_mib; 15777d720c3eSTejun Heo if (snmp_mib_init((void __percpu **)net->mib.ip_statistics, 15781823e4c8SEric Dumazet sizeof(struct ipstats_mib), 15791823e4c8SEric Dumazet __alignof__(struct ipstats_mib)) < 0) 1580a20f5799SPavel Emelyanov goto err_ip_mib; 1581827da44cSJohn Stultz 1582827da44cSJohn Stultz for_each_possible_cpu(i) { 1583827da44cSJohn Stultz struct ipstats_mib *af_inet_stats; 1584827da44cSJohn Stultz af_inet_stats = per_cpu_ptr(net->mib.ip_statistics[0], i); 1585827da44cSJohn Stultz u64_stats_init(&af_inet_stats->syncp); 1586827da44cSJohn Stultz #if SNMP_ARRAY_SZ == 2 1587827da44cSJohn Stultz af_inet_stats = per_cpu_ptr(net->mib.ip_statistics[1], i); 1588827da44cSJohn Stultz u64_stats_init(&af_inet_stats->syncp); 1589827da44cSJohn Stultz #endif 1590827da44cSJohn Stultz } 1591827da44cSJohn Stultz 15927d720c3eSTejun Heo if (snmp_mib_init((void __percpu **)net->mib.net_statistics, 15931823e4c8SEric Dumazet sizeof(struct linux_mib), 15941823e4c8SEric Dumazet __alignof__(struct linux_mib)) < 0) 159561a7e260SPavel Emelyanov goto err_net_mib; 15967d720c3eSTejun Heo if (snmp_mib_init((void __percpu **)net->mib.udp_statistics, 15971823e4c8SEric Dumazet sizeof(struct udp_mib), 15981823e4c8SEric Dumazet __alignof__(struct udp_mib)) < 0) 15992f275f91SPavel Emelyanov goto err_udp_mib; 16007d720c3eSTejun Heo if (snmp_mib_init((void __percpu **)net->mib.udplite_statistics, 16011823e4c8SEric Dumazet sizeof(struct udp_mib), 16021823e4c8SEric Dumazet __alignof__(struct udp_mib)) < 0) 1603386019d3SPavel Emelyanov goto err_udplite_mib; 16047d720c3eSTejun Heo if (snmp_mib_init((void __percpu **)net->mib.icmp_statistics, 16051823e4c8SEric Dumazet sizeof(struct icmp_mib), 16061823e4c8SEric Dumazet __alignof__(struct icmp_mib)) < 0) 1607b60538a0SPavel Emelyanov goto err_icmp_mib; 1608acb32ba3SEric Dumazet net->mib.icmpmsg_statistics = kzalloc(sizeof(struct icmpmsg_mib), 1609acb32ba3SEric Dumazet GFP_KERNEL); 1610acb32ba3SEric Dumazet if (!net->mib.icmpmsg_statistics) 1611923c6586SPavel Emelyanov goto err_icmpmsg_mib; 161257ef42d5SPavel Emelyanov 161357ef42d5SPavel Emelyanov tcp_mib_init(net); 16149b4661bdSPavel Emelyanov return 0; 161557ef42d5SPavel Emelyanov 1616923c6586SPavel Emelyanov err_icmpmsg_mib: 16177d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.icmp_statistics); 1618b60538a0SPavel Emelyanov err_icmp_mib: 16197d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.udplite_statistics); 1620386019d3SPavel Emelyanov err_udplite_mib: 16217d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.udp_statistics); 16222f275f91SPavel Emelyanov err_udp_mib: 16237d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.net_statistics); 162461a7e260SPavel Emelyanov err_net_mib: 16257d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.ip_statistics); 1626a20f5799SPavel Emelyanov err_ip_mib: 16277d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.tcp_statistics); 162857ef42d5SPavel Emelyanov err_tcp_mib: 162957ef42d5SPavel Emelyanov return -ENOMEM; 16309b4661bdSPavel Emelyanov } 16319b4661bdSPavel Emelyanov 16329b4661bdSPavel Emelyanov static __net_exit void ipv4_mib_exit_net(struct net *net) 16339b4661bdSPavel Emelyanov { 1634acb32ba3SEric Dumazet kfree(net->mib.icmpmsg_statistics); 16357d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.icmp_statistics); 16367d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.udplite_statistics); 16377d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.udp_statistics); 16387d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.net_statistics); 16397d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.ip_statistics); 16407d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.tcp_statistics); 16419b4661bdSPavel Emelyanov } 16429b4661bdSPavel Emelyanov 16439b4661bdSPavel Emelyanov static __net_initdata struct pernet_operations ipv4_mib_ops = { 16449b4661bdSPavel Emelyanov .init = ipv4_mib_init_net, 16459b4661bdSPavel Emelyanov .exit = ipv4_mib_exit_net, 16469b4661bdSPavel Emelyanov }; 16479b4661bdSPavel Emelyanov 16481da177e4SLinus Torvalds static int __init init_ipv4_mibs(void) 16491da177e4SLinus Torvalds { 1650d89cbbb1SPavel Emelyanov return register_pernet_subsys(&ipv4_mib_ops); 16511da177e4SLinus Torvalds } 16521da177e4SLinus Torvalds 16531da177e4SLinus Torvalds static int ipv4_proc_init(void); 16541da177e4SLinus Torvalds 165530e224d7SHerbert Xu /* 165630e224d7SHerbert Xu * IP protocol layer initialiser 165730e224d7SHerbert Xu */ 165830e224d7SHerbert Xu 165922061d80SVlad Yasevich static struct packet_offload ip_packet_offload __read_mostly = { 166022061d80SVlad Yasevich .type = cpu_to_be16(ETH_P_IP), 1661f191a1d1SVlad Yasevich .callbacks = { 1662a430a43dSHerbert Xu .gso_send_check = inet_gso_send_check, 1663f4c50d99SHerbert Xu .gso_segment = inet_gso_segment, 166473cc19f1SHerbert Xu .gro_receive = inet_gro_receive, 166573cc19f1SHerbert Xu .gro_complete = inet_gro_complete, 1666f191a1d1SVlad Yasevich }, 166730e224d7SHerbert Xu }; 166830e224d7SHerbert Xu 1669cb32f511SEric Dumazet static const struct net_offload ipip_offload = { 1670cb32f511SEric Dumazet .callbacks = { 1671cb32f511SEric Dumazet .gso_send_check = inet_gso_send_check, 1672cb32f511SEric Dumazet .gso_segment = inet_gso_segment, 1673cb32f511SEric Dumazet }, 1674cb32f511SEric Dumazet }; 1675cb32f511SEric Dumazet 1676808a8f88SVlad Yasevich static int __init ipv4_offload_init(void) 1677808a8f88SVlad Yasevich { 1678808a8f88SVlad Yasevich /* 1679808a8f88SVlad Yasevich * Add offloads 1680808a8f88SVlad Yasevich */ 1681da5bab07SDaniel Borkmann if (udpv4_offload_init() < 0) 1682808a8f88SVlad Yasevich pr_crit("%s: Cannot add UDP protocol offload\n", __func__); 168328850dc7SDaniel Borkmann if (tcpv4_offload_init() < 0) 168428850dc7SDaniel Borkmann pr_crit("%s: Cannot add TCP protocol offload\n", __func__); 1685808a8f88SVlad Yasevich 1686808a8f88SVlad Yasevich dev_add_offload(&ip_packet_offload); 1687cb32f511SEric Dumazet inet_add_offload(&ipip_offload, IPPROTO_IPIP); 1688808a8f88SVlad Yasevich return 0; 1689808a8f88SVlad Yasevich } 1690808a8f88SVlad Yasevich 1691808a8f88SVlad Yasevich fs_initcall(ipv4_offload_init); 1692808a8f88SVlad Yasevich 1693808a8f88SVlad Yasevich static struct packet_type ip_packet_type __read_mostly = { 1694808a8f88SVlad Yasevich .type = cpu_to_be16(ETH_P_IP), 1695808a8f88SVlad Yasevich .func = ip_rcv, 1696808a8f88SVlad Yasevich }; 1697808a8f88SVlad Yasevich 16981da177e4SLinus Torvalds static int __init inet_init(void) 16991da177e4SLinus Torvalds { 17001da177e4SLinus Torvalds struct inet_protosw *q; 17011da177e4SLinus Torvalds struct list_head *r; 17021da177e4SLinus Torvalds int rc = -EINVAL; 17031da177e4SLinus Torvalds 170495c7e0e4SYOSHIFUJI Hideaki / 吉藤英明 BUILD_BUG_ON(sizeof(struct inet_skb_parm) > FIELD_SIZEOF(struct sk_buff, cb)); 17051da177e4SLinus Torvalds 1706e3826f1eSAmerigo Wang sysctl_local_reserved_ports = kzalloc(65536 / 8, GFP_KERNEL); 1707e3826f1eSAmerigo Wang if (!sysctl_local_reserved_ports) 1708e3826f1eSAmerigo Wang goto out; 1709e3826f1eSAmerigo Wang 17101da177e4SLinus Torvalds rc = proto_register(&tcp_prot, 1); 17111da177e4SLinus Torvalds if (rc) 1712e3826f1eSAmerigo Wang goto out_free_reserved_ports; 17131da177e4SLinus Torvalds 17141da177e4SLinus Torvalds rc = proto_register(&udp_prot, 1); 17151da177e4SLinus Torvalds if (rc) 17161da177e4SLinus Torvalds goto out_unregister_tcp_proto; 17171da177e4SLinus Torvalds 17181da177e4SLinus Torvalds rc = proto_register(&raw_prot, 1); 17191da177e4SLinus Torvalds if (rc) 17201da177e4SLinus Torvalds goto out_unregister_udp_proto; 17211da177e4SLinus Torvalds 1722c319b4d7SVasiliy Kulikov rc = proto_register(&ping_prot, 1); 1723c319b4d7SVasiliy Kulikov if (rc) 1724c319b4d7SVasiliy Kulikov goto out_unregister_raw_proto; 1725c319b4d7SVasiliy Kulikov 17261da177e4SLinus Torvalds /* 17271da177e4SLinus Torvalds * Tell SOCKET that we are alive... 17281da177e4SLinus Torvalds */ 17291da177e4SLinus Torvalds 17301da177e4SLinus Torvalds (void)sock_register(&inet_family_ops); 17311da177e4SLinus Torvalds 1732bd7b1533SAl Viro #ifdef CONFIG_SYSCTL 1733bd7b1533SAl Viro ip_static_sysctl_init(); 1734bd7b1533SAl Viro #endif 1735bd7b1533SAl Viro 17361da177e4SLinus Torvalds /* 17371da177e4SLinus Torvalds * Add all the base protocols. 17381da177e4SLinus Torvalds */ 17391da177e4SLinus Torvalds 17401da177e4SLinus Torvalds if (inet_add_protocol(&icmp_protocol, IPPROTO_ICMP) < 0) 1741058bd4d2SJoe Perches pr_crit("%s: Cannot add ICMP protocol\n", __func__); 17421da177e4SLinus Torvalds if (inet_add_protocol(&udp_protocol, IPPROTO_UDP) < 0) 1743058bd4d2SJoe Perches pr_crit("%s: Cannot add UDP protocol\n", __func__); 17441da177e4SLinus Torvalds if (inet_add_protocol(&tcp_protocol, IPPROTO_TCP) < 0) 1745058bd4d2SJoe Perches pr_crit("%s: Cannot add TCP protocol\n", __func__); 17461da177e4SLinus Torvalds #ifdef CONFIG_IP_MULTICAST 17471da177e4SLinus Torvalds if (inet_add_protocol(&igmp_protocol, IPPROTO_IGMP) < 0) 1748058bd4d2SJoe Perches pr_crit("%s: Cannot add IGMP protocol\n", __func__); 17491da177e4SLinus Torvalds #endif 17501da177e4SLinus Torvalds 17511da177e4SLinus Torvalds /* Register the socket-side information for inet_create. */ 17521da177e4SLinus Torvalds for (r = &inetsw[0]; r < &inetsw[SOCK_MAX]; ++r) 17531da177e4SLinus Torvalds INIT_LIST_HEAD(r); 17541da177e4SLinus Torvalds 17551da177e4SLinus Torvalds for (q = inetsw_array; q < &inetsw_array[INETSW_ARRAY_LEN]; ++q) 17561da177e4SLinus Torvalds inet_register_protosw(q); 17571da177e4SLinus Torvalds 17581da177e4SLinus Torvalds /* 17591da177e4SLinus Torvalds * Set the ARP module up 17601da177e4SLinus Torvalds */ 17611da177e4SLinus Torvalds 17621da177e4SLinus Torvalds arp_init(); 17631da177e4SLinus Torvalds 17641da177e4SLinus Torvalds /* 17651da177e4SLinus Torvalds * Set the IP module up 17661da177e4SLinus Torvalds */ 17671da177e4SLinus Torvalds 17681da177e4SLinus Torvalds ip_init(); 17691da177e4SLinus Torvalds 17709b0f976fSDenis V. Lunev tcp_v4_init(); 17711da177e4SLinus Torvalds 17721da177e4SLinus Torvalds /* Setup TCP slab cache for open requests. */ 17731da177e4SLinus Torvalds tcp_init(); 17741da177e4SLinus Torvalds 177595766fffSHideo Aoki /* Setup UDP memory threshold */ 177695766fffSHideo Aoki udp_init(); 177795766fffSHideo Aoki 1778ba4e58ecSGerrit Renker /* Add UDP-Lite (RFC 3828) */ 1779ba4e58ecSGerrit Renker udplite4_register(); 17801da177e4SLinus Torvalds 1781c319b4d7SVasiliy Kulikov ping_init(); 1782c319b4d7SVasiliy Kulikov 17831da177e4SLinus Torvalds /* 17841da177e4SLinus Torvalds * Set the ICMP layer up 17851da177e4SLinus Torvalds */ 17861da177e4SLinus Torvalds 1787a5710d65SDenis V. Lunev if (icmp_init() < 0) 1788a5710d65SDenis V. Lunev panic("Failed to create the ICMP control socket.\n"); 17891da177e4SLinus Torvalds 17901da177e4SLinus Torvalds /* 17911da177e4SLinus Torvalds * Initialise the multicast router 17921da177e4SLinus Torvalds */ 17931da177e4SLinus Torvalds #if defined(CONFIG_IP_MROUTE) 179403d2f897SWang Chen if (ip_mr_init()) 1795058bd4d2SJoe Perches pr_crit("%s: Cannot init ipv4 mroute\n", __func__); 17961da177e4SLinus Torvalds #endif 17971da177e4SLinus Torvalds /* 17981da177e4SLinus Torvalds * Initialise per-cpu ipv4 mibs 17991da177e4SLinus Torvalds */ 18001da177e4SLinus Torvalds 18011da177e4SLinus Torvalds if (init_ipv4_mibs()) 1802058bd4d2SJoe Perches pr_crit("%s: Cannot init ipv4 mibs\n", __func__); 18031da177e4SLinus Torvalds 18041da177e4SLinus Torvalds ipv4_proc_init(); 18051da177e4SLinus Torvalds 18061da177e4SLinus Torvalds ipfrag_init(); 18071da177e4SLinus Torvalds 180830e224d7SHerbert Xu dev_add_pack(&ip_packet_type); 180930e224d7SHerbert Xu 18101da177e4SLinus Torvalds rc = 0; 18111da177e4SLinus Torvalds out: 18121da177e4SLinus Torvalds return rc; 1813c319b4d7SVasiliy Kulikov out_unregister_raw_proto: 1814c319b4d7SVasiliy Kulikov proto_unregister(&raw_prot); 18151da177e4SLinus Torvalds out_unregister_udp_proto: 18161da177e4SLinus Torvalds proto_unregister(&udp_prot); 1817321efff7SOlaf Kirch out_unregister_tcp_proto: 1818321efff7SOlaf Kirch proto_unregister(&tcp_prot); 1819e3826f1eSAmerigo Wang out_free_reserved_ports: 1820e3826f1eSAmerigo Wang kfree(sysctl_local_reserved_ports); 18211da177e4SLinus Torvalds goto out; 18221da177e4SLinus Torvalds } 18231da177e4SLinus Torvalds 1824a536e077SHeiko Carstens fs_initcall(inet_init); 18251da177e4SLinus Torvalds 18261da177e4SLinus Torvalds /* ------------------------------------------------------------------------ */ 18271da177e4SLinus Torvalds 18281da177e4SLinus Torvalds #ifdef CONFIG_PROC_FS 18291da177e4SLinus Torvalds static int __init ipv4_proc_init(void) 18301da177e4SLinus Torvalds { 18311da177e4SLinus Torvalds int rc = 0; 18321da177e4SLinus Torvalds 18331da177e4SLinus Torvalds if (raw_proc_init()) 18341da177e4SLinus Torvalds goto out_raw; 18351da177e4SLinus Torvalds if (tcp4_proc_init()) 18361da177e4SLinus Torvalds goto out_tcp; 18371da177e4SLinus Torvalds if (udp4_proc_init()) 18381da177e4SLinus Torvalds goto out_udp; 1839c319b4d7SVasiliy Kulikov if (ping_proc_init()) 1840c319b4d7SVasiliy Kulikov goto out_ping; 18411da177e4SLinus Torvalds if (ip_misc_proc_init()) 18421da177e4SLinus Torvalds goto out_misc; 18431da177e4SLinus Torvalds out: 18441da177e4SLinus Torvalds return rc; 18451da177e4SLinus Torvalds out_misc: 1846c319b4d7SVasiliy Kulikov ping_proc_exit(); 1847c319b4d7SVasiliy Kulikov out_ping: 18481da177e4SLinus Torvalds udp4_proc_exit(); 18491da177e4SLinus Torvalds out_udp: 18501da177e4SLinus Torvalds tcp4_proc_exit(); 18511da177e4SLinus Torvalds out_tcp: 18521da177e4SLinus Torvalds raw_proc_exit(); 18531da177e4SLinus Torvalds out_raw: 18541da177e4SLinus Torvalds rc = -ENOMEM; 18551da177e4SLinus Torvalds goto out; 18561da177e4SLinus Torvalds } 18571da177e4SLinus Torvalds 18581da177e4SLinus Torvalds #else /* CONFIG_PROC_FS */ 18591da177e4SLinus Torvalds static int __init ipv4_proc_init(void) 18601da177e4SLinus Torvalds { 18611da177e4SLinus Torvalds return 0; 18621da177e4SLinus Torvalds } 18631da177e4SLinus Torvalds #endif /* CONFIG_PROC_FS */ 18641da177e4SLinus Torvalds 18651da177e4SLinus Torvalds MODULE_ALIAS_NETPROTO(PF_INET); 18661da177e4SLinus Torvalds 1867