aboutsummaryrefslogtreecommitdiff
path: root/net/ipv6
diff options
context:
space:
mode:
Diffstat (limited to 'net/ipv6')
-rw-r--r--net/ipv6/tcp_ipv6.c139
1 files changed, 74 insertions, 65 deletions
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 3312cb8742e..2bc7fafe766 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -76,26 +76,27 @@ static struct tcp_func ipv6_mapped;
static struct tcp_func ipv6_specific;
/* I have no idea if this is a good hash for v6 or not. -DaveM */
-static __inline__ int tcp_v6_hashfn(struct in6_addr *laddr, u16 lport,
- struct in6_addr *faddr, u16 fport)
+static inline int inet6_ehashfn(const struct in6_addr *laddr, const u16 lport,
+ const struct in6_addr *faddr, const u16 fport,
+ const int ehash_size)
{
int hashent = (lport ^ fport);
hashent ^= (laddr->s6_addr32[3] ^ faddr->s6_addr32[3]);
hashent ^= hashent>>16;
hashent ^= hashent>>8;
- return (hashent & (tcp_hashinfo.ehash_size - 1));
+ return (hashent & (ehash_size - 1));
}
-static __inline__ int tcp_v6_sk_hashfn(struct sock *sk)
+static inline int inet6_sk_ehashfn(const struct sock *sk, const int ehash_size)
{
- struct inet_sock *inet = inet_sk(sk);
- struct ipv6_pinfo *np = inet6_sk(sk);
- struct in6_addr *laddr = &np->rcv_saddr;
- struct in6_addr *faddr = &np->daddr;
- __u16 lport = inet->num;
- __u16 fport = inet->dport;
- return tcp_v6_hashfn(laddr, lport, faddr, fport);
+ const struct inet_sock *inet = inet_sk(sk);
+ const struct ipv6_pinfo *np = inet6_sk(sk);
+ const struct in6_addr *laddr = &np->rcv_saddr;
+ const struct in6_addr *faddr = &np->daddr;
+ const __u16 lport = inet->num;
+ const __u16 fport = inet->dport;
+ return inet6_ehashfn(laddr, lport, faddr, fport, ehash_size);
}
static inline int tcp_v6_bind_conflict(const struct sock *sk,
@@ -231,7 +232,7 @@ static __inline__ void __tcp_v6_hash(struct sock *sk)
lock = &tcp_hashinfo.lhash_lock;
inet_listen_wlock(&tcp_hashinfo);
} else {
- sk->sk_hashent = tcp_v6_sk_hashfn(sk);
+ sk->sk_hashent = inet6_sk_ehashfn(sk, tcp_hashinfo.ehash_size);
list = &tcp_hashinfo.ehash[sk->sk_hashent].chain;
lock = &tcp_hashinfo.ehash[sk->sk_hashent].lock;
write_lock(lock);
@@ -258,7 +259,10 @@ static void tcp_v6_hash(struct sock *sk)
}
}
-static struct sock *tcp_v6_lookup_listener(struct in6_addr *daddr, unsigned short hnum, int dif)
+static struct sock *inet6_lookup_listener(struct inet_hashinfo *hashinfo,
+ const struct in6_addr *daddr,
+ const unsigned short hnum,
+ const int dif)
{
struct sock *sk;
struct hlist_node *node;
@@ -266,8 +270,8 @@ static struct sock *tcp_v6_lookup_listener(struct in6_addr *daddr, unsigned shor
int score, hiscore;
hiscore=0;
- read_lock(&tcp_hashinfo.lhash_lock);
- sk_for_each(sk, node, &tcp_hashinfo.listening_hash[inet_lhashfn(hnum)]) {
+ read_lock(&hashinfo->lhash_lock);
+ sk_for_each(sk, node, &hashinfo->listening_hash[inet_lhashfn(hnum)]) {
if (inet_sk(sk)->num == hnum && sk->sk_family == PF_INET6) {
struct ipv6_pinfo *np = inet6_sk(sk);
@@ -294,7 +298,7 @@ static struct sock *tcp_v6_lookup_listener(struct in6_addr *daddr, unsigned shor
}
if (result)
sock_hold(result);
- read_unlock(&tcp_hashinfo.lhash_lock);
+ read_unlock(&hashinfo->lhash_lock);
return result;
}
@@ -304,9 +308,13 @@ static struct sock *tcp_v6_lookup_listener(struct in6_addr *daddr, unsigned shor
* The sockhash lock must be held as a reader here.
*/
-static inline struct sock *__tcp_v6_lookup_established(struct in6_addr *saddr, u16 sport,
- struct in6_addr *daddr, u16 hnum,
- int dif)
+static inline struct sock *
+ __inet6_lookup_established(struct inet_hashinfo *hashinfo,
+ const struct in6_addr *saddr,
+ const u16 sport,
+ const struct in6_addr *daddr,
+ const u16 hnum,
+ const int dif)
{
struct sock *sk;
const struct hlist_node *node;
@@ -314,8 +322,9 @@ static inline struct sock *__tcp_v6_lookup_established(struct in6_addr *saddr, u
/* Optimize here for direct hit, only listening connections can
* have wildcards anyways.
*/
- const int hash = tcp_v6_hashfn(daddr, hnum, saddr, sport);
- struct inet_ehash_bucket *head = &tcp_hashinfo.ehash[hash];
+ const int hash = inet6_ehashfn(daddr, hnum, saddr, sport,
+ hashinfo->ehash_size);
+ struct inet_ehash_bucket *head = &hashinfo->ehash[hash];
read_lock(&head->lock);
sk_for_each(sk, node, &head->chain) {
@@ -324,7 +333,7 @@ static inline struct sock *__tcp_v6_lookup_established(struct in6_addr *saddr, u
goto hit; /* You sunk my battleship! */
}
/* Must check for a TIME_WAIT'er before going to listener hash. */
- sk_for_each(sk, node, &(head + tcp_hashinfo.ehash_size)->chain) {
+ sk_for_each(sk, node, &(head + hashinfo->ehash_size)->chain) {
const struct inet_timewait_sock *tw = inet_twsk(sk);
if(*((__u32 *)&(tw->tw_dport)) == ports &&
@@ -347,34 +356,36 @@ hit:
}
-static inline struct sock *__tcp_v6_lookup(struct in6_addr *saddr, u16 sport,
- struct in6_addr *daddr, u16 hnum,
- int dif)
+static inline struct sock *__inet6_lookup(struct inet_hashinfo *hashinfo,
+ const struct in6_addr *saddr,
+ const u16 sport,
+ const struct in6_addr *daddr,
+ const u16 hnum,
+ const int dif)
{
- struct sock *sk;
-
- sk = __tcp_v6_lookup_established(saddr, sport, daddr, hnum, dif);
-
+ struct sock *sk = __inet6_lookup_established(hashinfo, saddr, sport,
+ daddr, hnum, dif);
if (sk)
return sk;
- return tcp_v6_lookup_listener(daddr, hnum, dif);
+ return inet6_lookup_listener(hashinfo, daddr, hnum, dif);
}
-inline struct sock *tcp_v6_lookup(struct in6_addr *saddr, u16 sport,
- struct in6_addr *daddr, u16 dport,
- int dif)
+inline struct sock *inet6_lookup(struct inet_hashinfo *hashinfo,
+ const struct in6_addr *saddr, const u16 sport,
+ const struct in6_addr *daddr, const u16 dport,
+ const int dif)
{
struct sock *sk;
local_bh_disable();
- sk = __tcp_v6_lookup(saddr, sport, daddr, ntohs(dport), dif);
+ sk = __inet6_lookup(hashinfo, saddr, sport, daddr, ntohs(dport), dif);
local_bh_enable();
return sk;
}
-EXPORT_SYMBOL_GPL(tcp_v6_lookup);
+EXPORT_SYMBOL_GPL(inet6_lookup);
/*
@@ -454,16 +465,17 @@ static __u32 tcp_v6_init_sequence(struct sock *sk, struct sk_buff *skb)
}
}
-static int __tcp_v6_check_established(struct sock *sk, __u16 lport,
+static int __tcp_v6_check_established(struct sock *sk, const __u16 lport,
struct inet_timewait_sock **twp)
{
struct inet_sock *inet = inet_sk(sk);
- struct ipv6_pinfo *np = inet6_sk(sk);
- struct in6_addr *daddr = &np->rcv_saddr;
- struct in6_addr *saddr = &np->daddr;
- int dif = sk->sk_bound_dev_if;
+ const struct ipv6_pinfo *np = inet6_sk(sk);
+ const struct in6_addr *daddr = &np->rcv_saddr;
+ const struct in6_addr *saddr = &np->daddr;
+ const int dif = sk->sk_bound_dev_if;
const u32 ports = INET_COMBINED_PORTS(inet->dport, lport);
- const int hash = tcp_v6_hashfn(daddr, inet->num, saddr, inet->dport);
+ const int hash = inet6_ehashfn(daddr, inet->num, saddr, inet->dport,
+ tcp_hashinfo.ehash_size);
struct inet_ehash_bucket *head = &tcp_hashinfo.ehash[hash];
struct sock *sk2;
const struct hlist_node *node;
@@ -637,11 +649,6 @@ out:
}
}
-static __inline__ int tcp_v6_iif(struct sk_buff *skb)
-{
- return IP6CB(skb)->iif;
-}
-
static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
int addr_len)
{
@@ -833,14 +840,15 @@ static void tcp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
int type, int code, int offset, __u32 info)
{
struct ipv6hdr *hdr = (struct ipv6hdr*)skb->data;
- struct tcphdr *th = (struct tcphdr *)(skb->data+offset);
+ const struct tcphdr *th = (struct tcphdr *)(skb->data+offset);
struct ipv6_pinfo *np;
struct sock *sk;
int err;
struct tcp_sock *tp;
__u32 seq;
- sk = tcp_v6_lookup(&hdr->daddr, th->dest, &hdr->saddr, th->source, skb->dev->ifindex);
+ sk = inet6_lookup(&tcp_hashinfo, &hdr->daddr, th->dest, &hdr->saddr,
+ th->source, skb->dev->ifindex);
if (sk == NULL) {
ICMP6_INC_STATS_BH(__in6_dev_get(skb->dev), ICMP6_MIB_INERRORS);
@@ -927,7 +935,7 @@ static void tcp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
goto out;
req = tcp_v6_search_req(sk, &prev, th->dest, &hdr->daddr,
- &hdr->saddr, tcp_v6_iif(skb));
+ &hdr->saddr, inet6_iif(skb));
if (!req)
goto out;
@@ -1138,7 +1146,7 @@ static void tcp_v6_send_reset(struct sk_buff *skb)
buff->csum);
fl.proto = IPPROTO_TCP;
- fl.oif = tcp_v6_iif(skb);
+ fl.oif = inet6_iif(skb);
fl.fl_ip_dport = t1->dest;
fl.fl_ip_sport = t1->source;
@@ -1207,7 +1215,7 @@ static void tcp_v6_send_ack(struct sk_buff *skb, u32 seq, u32 ack, u32 win, u32
buff->csum);
fl.proto = IPPROTO_TCP;
- fl.oif = tcp_v6_iif(skb);
+ fl.oif = inet6_iif(skb);
fl.fl_ip_dport = t1->dest;
fl.fl_ip_sport = t1->source;
@@ -1245,20 +1253,18 @@ static void tcp_v6_reqsk_send_ack(struct sk_buff *skb, struct request_sock *req)
static struct sock *tcp_v6_hnd_req(struct sock *sk,struct sk_buff *skb)
{
struct request_sock *req, **prev;
- struct tcphdr *th = skb->h.th;
+ const struct tcphdr *th = skb->h.th;
struct sock *nsk;
/* Find possible connection requests. */
req = tcp_v6_search_req(sk, &prev, th->source, &skb->nh.ipv6h->saddr,
- &skb->nh.ipv6h->daddr, tcp_v6_iif(skb));
+ &skb->nh.ipv6h->daddr, inet6_iif(skb));
if (req)
return tcp_check_req(sk, skb, req, prev);
- nsk = __tcp_v6_lookup_established(&skb->nh.ipv6h->saddr,
- th->source,
- &skb->nh.ipv6h->daddr,
- ntohs(th->dest),
- tcp_v6_iif(skb));
+ nsk = __inet6_lookup_established(&tcp_hashinfo, &skb->nh.ipv6h->saddr,
+ th->source, &skb->nh.ipv6h->daddr,
+ ntohs(th->dest), inet6_iif(skb));
if (nsk) {
if (nsk->sk_state != TCP_TIME_WAIT) {
@@ -1346,7 +1352,7 @@ static int tcp_v6_conn_request(struct sock *sk, struct sk_buff *skb)
/* So that link locals have meaning */
if (!sk->sk_bound_dev_if &&
ipv6_addr_type(&treq->rmt_addr) & IPV6_ADDR_LINKLOCAL)
- treq->iif = tcp_v6_iif(skb);
+ treq->iif = inet6_iif(skb);
if (isn == 0)
isn = tcp_v6_init_sequence(sk,skb);
@@ -1411,7 +1417,7 @@ static struct sock * tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
newsk->sk_backlog_rcv = tcp_v4_do_rcv;
newnp->pktoptions = NULL;
newnp->opt = NULL;
- newnp->mcast_oif = tcp_v6_iif(skb);
+ newnp->mcast_oif = inet6_iif(skb);
newnp->mcast_hops = skb->nh.ipv6h->hop_limit;
/*
@@ -1516,7 +1522,7 @@ static struct sock * tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
skb_set_owner_r(newnp->pktoptions, newsk);
}
newnp->opt = NULL;
- newnp->mcast_oif = tcp_v6_iif(skb);
+ newnp->mcast_oif = inet6_iif(skb);
newnp->mcast_hops = skb->nh.ipv6h->hop_limit;
/* Clone native IPv6 options from listening socket (if any)
@@ -1691,7 +1697,7 @@ ipv6_pktoptions:
if (TCP_SKB_CB(opt_skb)->end_seq == tp->rcv_nxt &&
!((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_LISTEN))) {
if (np->rxopt.bits.rxinfo)
- np->mcast_oif = tcp_v6_iif(opt_skb);
+ np->mcast_oif = inet6_iif(opt_skb);
if (np->rxopt.bits.rxhlim)
np->mcast_hops = opt_skb->nh.ipv6h->hop_limit;
if (ipv6_opt_accepted(sk, opt_skb)) {
@@ -1746,8 +1752,9 @@ static int tcp_v6_rcv(struct sk_buff **pskb, unsigned int *nhoffp)
TCP_SKB_CB(skb)->flags = ipv6_get_dsfield(skb->nh.ipv6h);
TCP_SKB_CB(skb)->sacked = 0;
- sk = __tcp_v6_lookup(&skb->nh.ipv6h->saddr, th->source,
- &skb->nh.ipv6h->daddr, ntohs(th->dest), tcp_v6_iif(skb));
+ sk = __inet6_lookup(&tcp_hashinfo, &skb->nh.ipv6h->saddr, th->source,
+ &skb->nh.ipv6h->daddr, ntohs(th->dest),
+ inet6_iif(skb));
if (!sk)
goto no_tcp_socket;
@@ -1818,7 +1825,9 @@ do_time_wait:
{
struct sock *sk2;
- sk2 = tcp_v6_lookup_listener(&skb->nh.ipv6h->daddr, ntohs(th->dest), tcp_v6_iif(skb));
+ sk2 = inet6_lookup_listener(&tcp_hashinfo,
+ &skb->nh.ipv6h->daddr,
+ ntohs(th->dest), inet6_iif(skb));
if (sk2 != NULL) {
struct inet_timewait_sock *tw = inet_twsk(sk);
inet_twsk_deschedule(tw, &tcp_death_row);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-30 16:11:14 +0000