These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / net / ipv6 / inet6_connection_sock.c

diff --git a/kernel/net/ipv6/inet6_connection_sock.c b/kernel/net/ipv6/inet6_connection_sock.c
index 6927f3f..a7ca2cd 100644 (file)
--- 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)
 {
@@ -173,14 +110,6 @@ 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)
 {
@@ -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;
 }