X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=net%2Fipv6%2Faf_inet6.c;h=e19457fe4f6edb79ef059dbf88f93ed1836bc8d9;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=2b193e3df49a28f749c256141f499ef39c29b9e9;hpb=f7f1b0f1e2fbadeab12d24236000e778aa9b1ead;p=linux-2.6.git diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c index 2b193e3df..e19457fe4 100644 --- a/net/ipv6/af_inet6.c +++ b/net/ipv6/af_inet6.c @@ -22,6 +22,7 @@ #include +#include #include #include #include @@ -44,6 +45,7 @@ #include #include #include +#include #include #include @@ -66,45 +68,14 @@ MODULE_AUTHOR("Cast of dozens"); MODULE_DESCRIPTION("IPv6 protocol stack for Linux"); MODULE_LICENSE("GPL"); -/* IPv6 procfs goodies... */ - -#ifdef CONFIG_PROC_FS -extern int raw6_proc_init(void); -extern void raw6_proc_exit(void); -extern int tcp6_proc_init(void); -extern void tcp6_proc_exit(void); -extern int udp6_proc_init(void); -extern void udp6_proc_exit(void); -extern int ipv6_misc_proc_init(void); -extern void ipv6_misc_proc_exit(void); -extern int ac6_proc_init(void); -extern void ac6_proc_exit(void); -extern int if6_proc_init(void); -extern void if6_proc_exit(void); -#endif - int sysctl_ipv6_bindv6only; -#ifdef INET_REFCNT_DEBUG -atomic_t inet6_sock_nr; -EXPORT_SYMBOL(inet6_sock_nr); -#endif - /* The inetsw table contains everything that inet_create needs to * build a new socket. */ static struct list_head inetsw6[SOCK_MAX]; static DEFINE_SPINLOCK(inetsw6_lock); -static void inet6_sock_destruct(struct sock *sk) -{ - inet_sock_destruct(sk); - -#ifdef INET_REFCNT_DEBUG - atomic_dec(&inet6_sock_nr); -#endif -} - static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk) { const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo); @@ -122,10 +93,13 @@ static int inet6_create(struct socket *sock, int protocol) struct proto *answer_prot; unsigned char answer_flags; char answer_no_check; - int rc; + int try_loading_module = 0; + int err; /* Look for the requested type/protocol pair. */ answer = NULL; +lookup_protocol: + err = -ESOCKTNOSUPPORT; rcu_read_lock(); list_for_each_rcu(p, &inetsw6[sock->type]) { answer = list_entry(p, struct inet_protosw, list); @@ -143,21 +117,37 @@ static int inet6_create(struct socket *sock, int protocol) if (IPPROTO_IP == answer->protocol) break; } + err = -EPROTONOSUPPORT; answer = NULL; } - rc = -ESOCKTNOSUPPORT; - if (!answer) - goto out_rcu_unlock; - rc = -EPERM; + if (!answer) { + if (try_loading_module < 2) { + rcu_read_unlock(); + /* + * Be more specific, e.g. net-pf-10-proto-132-type-1 + * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM) + */ + if (++try_loading_module == 1) + request_module("net-pf-%d-proto-%d-type-%d", + PF_INET6, protocol, sock->type); + /* + * Fall back to generic, e.g. net-pf-10-proto-132 + * (net-pf-PF_INET6-proto-IPPROTO_SCTP) + */ + else + request_module("net-pf-%d-proto-%d", + PF_INET6, protocol); + goto lookup_protocol; + } else + goto out_rcu_unlock; + } + + err = -EPERM; if (answer->capability > 0 && !capable(answer->capability)) goto out_rcu_unlock; - rc = -EPROTONOSUPPORT; - if (!protocol) - goto out_rcu_unlock; sock->ops = answer->ops; - answer_prot = answer->prot; answer_no_check = answer->no_check; answer_flags = answer->flags; @@ -165,19 +155,20 @@ static int inet6_create(struct socket *sock, int protocol) BUG_TRAP(answer_prot->slab != NULL); - rc = -ENOBUFS; + err = -ENOBUFS; sk = sk_alloc(PF_INET6, GFP_KERNEL, answer_prot, 1); if (sk == NULL) goto out; sock_init_data(sock, sk); - rc = 0; + err = 0; sk->sk_no_check = answer_no_check; if (INET_PROTOSW_REUSE & answer_flags) sk->sk_reuse = 1; inet = inet_sk(sk); + inet->is_icsk = INET_PROTOSW_ICSK & answer_flags; if (SOCK_RAW == sock->type) { inet->num = protocol; @@ -185,7 +176,7 @@ static int inet6_create(struct socket *sock, int protocol) inet->hdrincl = 1; } - sk->sk_destruct = inet6_sock_destruct; + sk->sk_destruct = inet_sock_destruct; sk->sk_family = PF_INET6; sk->sk_protocol = protocol; @@ -212,12 +203,17 @@ static int inet6_create(struct socket *sock, int protocol) inet->pmtudisc = IP_PMTUDISC_DONT; else inet->pmtudisc = IP_PMTUDISC_WANT; + /* + * Increment only the relevant sk_prot->socks debug field, this changes + * the previous behaviour of incrementing both the equivalent to + * answer->prot->socks (inet6_sock_nr) and inet_sock_nr. + * + * This allows better debug granularity as we'll know exactly how many + * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6 + * transport protocol socks. -acme + */ + sk_refcnt_debug_inc(sk); - -#ifdef INET_REFCNT_DEBUG - atomic_inc(&inet6_sock_nr); - atomic_inc(&inet_sock_nr); -#endif if (inet->num) { /* It assumes that any protocol which allows * the user to assign a number at socket @@ -227,14 +223,14 @@ static int inet6_create(struct socket *sock, int protocol) sk->sk_prot->hash(sk); } if (sk->sk_prot->init) { - rc = sk->sk_prot->init(sk); - if (rc) { + err = sk->sk_prot->init(sk); + if (err) { sk_common_release(sk); goto out; } } out: - return rc; + return err; out_rcu_unlock: rcu_read_unlock(); goto out; @@ -373,12 +369,6 @@ int inet6_destroy_sock(struct sock *sk) struct sk_buff *skb; struct ipv6_txoptions *opt; - /* - * Release destination entry - */ - - sk_dst_reset(sk); - /* Release rx options */ if ((skb = xchg(&np->pktoptions, NULL)) != NULL) @@ -395,6 +385,8 @@ int inet6_destroy_sock(struct sock *sk) return 0; } +EXPORT_SYMBOL_GPL(inet6_destroy_sock); + /* * This does both peername and sockname. */ @@ -437,7 +429,6 @@ int inet6_getname(struct socket *sock, struct sockaddr *uaddr, int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) { struct sock *sk = sock->sk; - int err = -EINVAL; switch(cmd) { @@ -456,55 +447,62 @@ int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) case SIOCSIFDSTADDR: return addrconf_set_dstaddr((void __user *) arg); default: - if (!sk->sk_prot->ioctl || - (err = sk->sk_prot->ioctl(sk, cmd, arg)) == -ENOIOCTLCMD) - return(dev_ioctl(cmd,(void __user *) arg)); - return err; + if (!sk->sk_prot->ioctl) + return -ENOIOCTLCMD; + return sk->sk_prot->ioctl(sk, cmd, arg); } /*NOTREACHED*/ return(0); } -struct proto_ops inet6_stream_ops = { - .family = PF_INET6, - .owner = THIS_MODULE, - .release = inet6_release, - .bind = inet6_bind, - .connect = inet_stream_connect, /* ok */ - .socketpair = sock_no_socketpair, /* a do nothing */ - .accept = inet_accept, /* ok */ - .getname = inet6_getname, - .poll = tcp_poll, /* ok */ - .ioctl = inet6_ioctl, /* must change */ - .listen = inet_listen, /* ok */ - .shutdown = inet_shutdown, /* ok */ - .setsockopt = sock_common_setsockopt, /* ok */ - .getsockopt = sock_common_getsockopt, /* ok */ - .sendmsg = inet_sendmsg, /* ok */ - .recvmsg = sock_common_recvmsg, /* ok */ - .mmap = sock_no_mmap, - .sendpage = tcp_sendpage +const struct proto_ops inet6_stream_ops = { + .family = PF_INET6, + .owner = THIS_MODULE, + .release = inet6_release, + .bind = inet6_bind, + .connect = inet_stream_connect, /* ok */ + .socketpair = sock_no_socketpair, /* a do nothing */ + .accept = inet_accept, /* ok */ + .getname = inet6_getname, + .poll = tcp_poll, /* ok */ + .ioctl = inet6_ioctl, /* must change */ + .listen = inet_listen, /* ok */ + .shutdown = inet_shutdown, /* ok */ + .setsockopt = sock_common_setsockopt, /* ok */ + .getsockopt = sock_common_getsockopt, /* ok */ + .sendmsg = inet_sendmsg, /* ok */ + .recvmsg = sock_common_recvmsg, /* ok */ + .mmap = sock_no_mmap, + .sendpage = tcp_sendpage, +#ifdef CONFIG_COMPAT + .compat_setsockopt = compat_sock_common_setsockopt, + .compat_getsockopt = compat_sock_common_getsockopt, +#endif }; -struct proto_ops inet6_dgram_ops = { - .family = PF_INET6, - .owner = THIS_MODULE, - .release = inet6_release, - .bind = inet6_bind, - .connect = inet_dgram_connect, /* ok */ - .socketpair = sock_no_socketpair, /* a do nothing */ - .accept = sock_no_accept, /* a do nothing */ - .getname = inet6_getname, - .poll = udp_poll, /* ok */ - .ioctl = inet6_ioctl, /* must change */ - .listen = sock_no_listen, /* ok */ - .shutdown = inet_shutdown, /* ok */ - .setsockopt = sock_common_setsockopt, /* ok */ - .getsockopt = sock_common_getsockopt, /* ok */ - .sendmsg = inet_sendmsg, /* ok */ - .recvmsg = sock_common_recvmsg, /* ok */ - .mmap = sock_no_mmap, - .sendpage = sock_no_sendpage, +const struct proto_ops inet6_dgram_ops = { + .family = PF_INET6, + .owner = THIS_MODULE, + .release = inet6_release, + .bind = inet6_bind, + .connect = inet_dgram_connect, /* ok */ + .socketpair = sock_no_socketpair, /* a do nothing */ + .accept = sock_no_accept, /* a do nothing */ + .getname = inet6_getname, + .poll = udp_poll, /* ok */ + .ioctl = inet6_ioctl, /* must change */ + .listen = sock_no_listen, /* ok */ + .shutdown = inet_shutdown, /* ok */ + .setsockopt = sock_common_setsockopt, /* ok */ + .getsockopt = sock_common_getsockopt, /* ok */ + .sendmsg = inet_sendmsg, /* ok */ + .recvmsg = sock_common_recvmsg, /* ok */ + .mmap = sock_no_mmap, + .sendpage = sock_no_sendpage, +#ifdef CONFIG_COMPAT + .compat_setsockopt = compat_sock_common_setsockopt, + .compat_getsockopt = compat_sock_common_getsockopt, +#endif }; static struct net_proto_family inet6_family_ops = { @@ -513,31 +511,30 @@ static struct net_proto_family inet6_family_ops = { .owner = THIS_MODULE, }; -#ifdef CONFIG_SYSCTL -extern void ipv6_sysctl_register(void); -extern void ipv6_sysctl_unregister(void); -#endif - /* Same as inet6_dgram_ops, sans udp_poll. */ -static struct proto_ops inet6_sockraw_ops = { - .family = PF_INET6, - .owner = THIS_MODULE, - .release = inet6_release, - .bind = inet6_bind, - .connect = inet_dgram_connect, /* ok */ - .socketpair = sock_no_socketpair, /* a do nothing */ - .accept = sock_no_accept, /* a do nothing */ - .getname = inet6_getname, - .poll = datagram_poll, /* ok */ - .ioctl = inet6_ioctl, /* must change */ - .listen = sock_no_listen, /* ok */ - .shutdown = inet_shutdown, /* ok */ - .setsockopt = sock_common_setsockopt, /* ok */ - .getsockopt = sock_common_getsockopt, /* ok */ - .sendmsg = inet_sendmsg, /* ok */ - .recvmsg = sock_common_recvmsg, /* ok */ - .mmap = sock_no_mmap, - .sendpage = sock_no_sendpage, +static const struct proto_ops inet6_sockraw_ops = { + .family = PF_INET6, + .owner = THIS_MODULE, + .release = inet6_release, + .bind = inet6_bind, + .connect = inet_dgram_connect, /* ok */ + .socketpair = sock_no_socketpair, /* a do nothing */ + .accept = sock_no_accept, /* a do nothing */ + .getname = inet6_getname, + .poll = datagram_poll, /* ok */ + .ioctl = inet6_ioctl, /* must change */ + .listen = sock_no_listen, /* ok */ + .shutdown = inet_shutdown, /* ok */ + .setsockopt = sock_common_setsockopt, /* ok */ + .getsockopt = sock_common_getsockopt, /* ok */ + .sendmsg = inet_sendmsg, /* ok */ + .recvmsg = sock_common_recvmsg, /* ok */ + .mmap = sock_no_mmap, + .sendpage = sock_no_sendpage, +#ifdef CONFIG_COMPAT + .compat_setsockopt = compat_sock_common_setsockopt, + .compat_getsockopt = compat_sock_common_getsockopt, +#endif }; static struct inet_protosw rawv6_protosw = { @@ -620,17 +617,90 @@ inet6_unregister_protosw(struct inet_protosw *p) } } +int inet6_sk_rebuild_header(struct sock *sk) +{ + int err; + struct dst_entry *dst; + struct ipv6_pinfo *np = inet6_sk(sk); + + dst = __sk_dst_check(sk, np->dst_cookie); + + if (dst == NULL) { + struct inet_sock *inet = inet_sk(sk); + struct in6_addr *final_p = NULL, final; + struct flowi fl; + + memset(&fl, 0, sizeof(fl)); + fl.proto = sk->sk_protocol; + ipv6_addr_copy(&fl.fl6_dst, &np->daddr); + ipv6_addr_copy(&fl.fl6_src, &np->saddr); + fl.fl6_flowlabel = np->flow_label; + fl.oif = sk->sk_bound_dev_if; + fl.fl_ip_dport = inet->dport; + fl.fl_ip_sport = inet->sport; + + if (np->opt && np->opt->srcrt) { + struct rt0_hdr *rt0 = (struct rt0_hdr *) np->opt->srcrt; + ipv6_addr_copy(&final, &fl.fl6_dst); + ipv6_addr_copy(&fl.fl6_dst, rt0->addr); + final_p = &final; + } + + err = ip6_dst_lookup(sk, &dst, &fl); + if (err) { + sk->sk_route_caps = 0; + return err; + } + if (final_p) + ipv6_addr_copy(&fl.fl6_dst, final_p); + + if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0) { + sk->sk_err_soft = -err; + return err; + } + + ip6_dst_store(sk, dst, NULL); + sk->sk_route_caps = dst->dev->features & + ~(NETIF_F_IP_CSUM | NETIF_F_TSO); + } + + return 0; +} + +EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header); + +int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb) +{ + struct ipv6_pinfo *np = inet6_sk(sk); + struct inet6_skb_parm *opt = IP6CB(skb); + + if (np->rxopt.all) { + if ((opt->hop && (np->rxopt.bits.hopopts || + np->rxopt.bits.ohopopts)) || + ((IPV6_FLOWINFO_MASK & *(u32*)skb->nh.raw) && + np->rxopt.bits.rxflow) || + (opt->srcrt && (np->rxopt.bits.srcrt || + np->rxopt.bits.osrcrt)) || + ((opt->dst1 || opt->dst0) && + (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts))) + return 1; + } + return 0; +} + +EXPORT_SYMBOL_GPL(ipv6_opt_accepted); + int snmp6_mib_init(void *ptr[2], size_t mibsize, size_t mibalign) { if (ptr == NULL) return -EINVAL; - ptr[0] = __alloc_percpu(mibsize, mibalign); + ptr[0] = __alloc_percpu(mibsize); if (!ptr[0]) goto err0; - ptr[1] = __alloc_percpu(mibsize, mibalign); + ptr[1] = __alloc_percpu(mibsize); if (!ptr[1]) goto err1; @@ -684,8 +754,6 @@ static void cleanup_ipv6_mibs(void) snmp6_mib_free((void **)udp_stats_in6); } -extern int ipv6_misc_proc_init(void); - static int __init inet6_init(void) { struct sk_buff *dummy_skb; @@ -731,12 +799,14 @@ static int __init inet6_init(void) /* Register the family here so that the init calls below will * be able to create sockets. (?? is this dangerous ??) */ - (void) sock_register(&inet6_family_ops); + err = sock_register(&inet6_family_ops); + if (err) + goto out_unregister_raw_proto; /* Initialise ipv6 mibs */ err = init_ipv6_mibs(); if (err) - goto out_unregister_raw_proto; + goto out_unregister_sock; /* * ipngwg API draft makes clear that the correct semantics @@ -757,6 +827,9 @@ static int __init inet6_init(void) err = igmp6_init(&inet6_family_ops); if (err) goto igmp_fail; + err = ipv6_netfilter_init(); + if (err) + goto netfilter_fail; /* Create /proc/foo6 entries. */ #ifdef CONFIG_PROC_FS err = -ENOMEM; @@ -774,7 +847,6 @@ static int __init inet6_init(void) if (if6_proc_init()) goto proc_if6_fail; #endif - ipv6_packet_init(); ip6_route_init(); ip6_flowlabel_init(); err = addrconf_init(); @@ -791,6 +863,8 @@ static int __init inet6_init(void) /* Init v6 transport protocols. */ udpv6_init(); tcpv6_init(); + + ipv6_packet_init(); err = 0; out: return err; @@ -798,7 +872,6 @@ out: addrconf_fail: ip6_flowlabel_cleanup(); ip6_route_cleanup(); - ipv6_packet_cleanup(); #ifdef CONFIG_PROC_FS if6_proc_exit(); proc_if6_fail: @@ -813,6 +886,8 @@ proc_tcp6_fail: raw6_proc_exit(); proc_raw6_fail: #endif + ipv6_netfilter_fini(); +netfilter_fail: igmp6_cleanup(); igmp_fail: ndisc_cleanup(); @@ -823,6 +898,8 @@ icmp_fail: ipv6_sysctl_unregister(); #endif cleanup_ipv6_mibs(); +out_unregister_sock: + sock_unregister(PF_INET6); out_unregister_raw_proto: proto_unregister(&rawv6_prot); out_unregister_udp_proto: @@ -852,6 +929,7 @@ static void __exit inet6_exit(void) ip6_route_cleanup(); ipv6_packet_cleanup(); igmp6_cleanup(); + ipv6_netfilter_fini(); ndisc_cleanup(); icmpv6_cleanup(); #ifdef CONFIG_SYSCTL