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path: root/kernel/net/ipv6/inet6_connection_sock.c
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Diffstat (limited to 'kernel/net/ipv6/inet6_connection_sock.c')
-rw-r--r--kernel/net/ipv6/inet6_connection_sock.c98
1 files changed, 15 insertions, 83 deletions
diff --git a/kernel/net/ipv6/inet6_connection_sock.c b/kernel/net/ipv6/inet6_connection_sock.c
index 6927f3fb5..a7ca2cde2 100644
--- a/kernel/net/ipv6/inet6_connection_sock.c
+++ b/kernel/net/ipv6/inet6_connection_sock.c
@@ -65,19 +65,22 @@ int inet6_csk_bind_conflict(const struct sock *sk,
}
EXPORT_SYMBOL_GPL(inet6_csk_bind_conflict);
-struct dst_entry *inet6_csk_route_req(struct sock *sk,
+struct dst_entry *inet6_csk_route_req(const struct sock *sk,
struct flowi6 *fl6,
- const struct request_sock *req)
+ const struct request_sock *req,
+ u8 proto)
{
struct inet_request_sock *ireq = inet_rsk(req);
- struct ipv6_pinfo *np = inet6_sk(sk);
+ const struct ipv6_pinfo *np = inet6_sk(sk);
struct in6_addr *final_p, final;
struct dst_entry *dst;
memset(fl6, 0, sizeof(*fl6));
- fl6->flowi6_proto = IPPROTO_TCP;
+ fl6->flowi6_proto = proto;
fl6->daddr = ireq->ir_v6_rmt_addr;
- final_p = fl6_update_dst(fl6, np->opt, &final);
+ rcu_read_lock();
+ final_p = fl6_update_dst(fl6, rcu_dereference(np->opt), &final);
+ rcu_read_unlock();
fl6->saddr = ireq->ir_v6_loc_addr;
fl6->flowi6_oif = ireq->ir_iif;
fl6->flowi6_mark = ireq->ir_mark;
@@ -91,73 +94,7 @@ struct dst_entry *inet6_csk_route_req(struct sock *sk,
return dst;
}
-
-/*
- * request_sock (formerly open request) hash tables.
- */
-static u32 inet6_synq_hash(const struct in6_addr *raddr, const __be16 rport,
- const u32 rnd, const u32 synq_hsize)
-{
- u32 c;
-
- c = jhash_3words((__force u32)raddr->s6_addr32[0],
- (__force u32)raddr->s6_addr32[1],
- (__force u32)raddr->s6_addr32[2],
- rnd);
-
- c = jhash_2words((__force u32)raddr->s6_addr32[3],
- (__force u32)rport,
- c);
-
- return c & (synq_hsize - 1);
-}
-
-struct request_sock *inet6_csk_search_req(struct sock *sk,
- const __be16 rport,
- const struct in6_addr *raddr,
- const struct in6_addr *laddr,
- const int iif)
-{
- struct inet_connection_sock *icsk = inet_csk(sk);
- struct listen_sock *lopt = icsk->icsk_accept_queue.listen_opt;
- struct request_sock *req;
- u32 hash = inet6_synq_hash(raddr, rport, lopt->hash_rnd,
- lopt->nr_table_entries);
-
- spin_lock(&icsk->icsk_accept_queue.syn_wait_lock);
- for (req = lopt->syn_table[hash]; req != NULL; req = req->dl_next) {
- const struct inet_request_sock *ireq = inet_rsk(req);
-
- if (ireq->ir_rmt_port == rport &&
- req->rsk_ops->family == AF_INET6 &&
- ipv6_addr_equal(&ireq->ir_v6_rmt_addr, raddr) &&
- ipv6_addr_equal(&ireq->ir_v6_loc_addr, laddr) &&
- (!ireq->ir_iif || ireq->ir_iif == iif)) {
- atomic_inc(&req->rsk_refcnt);
- WARN_ON(req->sk != NULL);
- break;
- }
- }
- spin_unlock(&icsk->icsk_accept_queue.syn_wait_lock);
-
- return req;
-}
-EXPORT_SYMBOL_GPL(inet6_csk_search_req);
-
-void inet6_csk_reqsk_queue_hash_add(struct sock *sk,
- struct request_sock *req,
- const unsigned long timeout)
-{
- struct inet_connection_sock *icsk = inet_csk(sk);
- struct listen_sock *lopt = icsk->icsk_accept_queue.listen_opt;
- const u32 h = inet6_synq_hash(&inet_rsk(req)->ir_v6_rmt_addr,
- inet_rsk(req)->ir_rmt_port,
- lopt->hash_rnd, lopt->nr_table_entries);
-
- reqsk_queue_hash_req(&icsk->icsk_accept_queue, h, req, timeout);
- inet_csk_reqsk_queue_added(sk, timeout);
-}
-EXPORT_SYMBOL_GPL(inet6_csk_reqsk_queue_hash_add);
+EXPORT_SYMBOL(inet6_csk_route_req);
void inet6_csk_addr2sockaddr(struct sock *sk, struct sockaddr *uaddr)
{
@@ -174,14 +111,6 @@ void inet6_csk_addr2sockaddr(struct sock *sk, struct sockaddr *uaddr)
EXPORT_SYMBOL_GPL(inet6_csk_addr2sockaddr);
static inline
-void __inet6_csk_dst_store(struct sock *sk, struct dst_entry *dst,
- const struct in6_addr *daddr,
- const struct in6_addr *saddr)
-{
- __ip6_dst_store(sk, dst, daddr, saddr);
-}
-
-static inline
struct dst_entry *__inet6_csk_dst_check(struct sock *sk, u32 cookie)
{
return __sk_dst_check(sk, cookie);
@@ -207,14 +136,16 @@ static struct dst_entry *inet6_csk_route_socket(struct sock *sk,
fl6->fl6_dport = inet->inet_dport;
security_sk_classify_flow(sk, flowi6_to_flowi(fl6));
- final_p = fl6_update_dst(fl6, np->opt, &final);
+ rcu_read_lock();
+ final_p = fl6_update_dst(fl6, rcu_dereference(np->opt), &final);
+ rcu_read_unlock();
dst = __inet6_csk_dst_check(sk, np->dst_cookie);
if (!dst) {
dst = ip6_dst_lookup_flow(sk, fl6, final_p);
if (!IS_ERR(dst))
- __inet6_csk_dst_store(sk, dst, NULL, NULL);
+ ip6_dst_store(sk, dst, NULL, NULL);
}
return dst;
}
@@ -240,7 +171,8 @@ int inet6_csk_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl_unused
/* Restore final destination back after routing done */
fl6.daddr = sk->sk_v6_daddr;
- res = ip6_xmit(sk, skb, &fl6, np->opt, np->tclass);
+ res = ip6_xmit(sk, skb, &fl6, rcu_dereference(np->opt),
+ np->tclass);
rcu_read_unlock();
return res;
}