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authorDavid S. Miller <davem@davemloft.net>2016-04-24 01:26:24 +0300
committerDavid S. Miller <davem@davemloft.net>2016-04-24 01:51:33 +0300
commit1602f49b58abcb0d34a5f0a29d68e7c1769547aa (patch)
tree4848fb0ffbc581ff465fd9c9e5a5b10b06f09b68 /net/ipv6/datagram.c
parent22d37b6b0058365a80378ee6198d21e7f6c86327 (diff)
parent5f44abd041c5f3be76d57579ab254d78e601315b (diff)
downloadlinux-1602f49b58abcb0d34a5f0a29d68e7c1769547aa.tar.xz
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts were two cases of simple overlapping changes, nothing serious. In the UDP case, we need to add a hlist_add_tail_rcu() to linux/rculist.h, because we've moved UDP socket handling away from using nulls lists. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/datagram.c')
-rw-r--r--net/ipv6/datagram.c169
1 files changed, 106 insertions, 63 deletions
diff --git a/net/ipv6/datagram.c b/net/ipv6/datagram.c
index a73d70119fcd..3962b6c810fc 100644
--- a/net/ipv6/datagram.c
+++ b/net/ipv6/datagram.c
@@ -40,18 +40,114 @@ static bool ipv6_mapped_addr_any(const struct in6_addr *a)
return ipv6_addr_v4mapped(a) && (a->s6_addr32[3] == 0);
}
+static void ip6_datagram_flow_key_init(struct flowi6 *fl6, struct sock *sk)
+{
+ struct inet_sock *inet = inet_sk(sk);
+ struct ipv6_pinfo *np = inet6_sk(sk);
+
+ memset(fl6, 0, sizeof(*fl6));
+ fl6->flowi6_proto = sk->sk_protocol;
+ fl6->daddr = sk->sk_v6_daddr;
+ fl6->saddr = np->saddr;
+ fl6->flowi6_oif = sk->sk_bound_dev_if;
+ fl6->flowi6_mark = sk->sk_mark;
+ fl6->fl6_dport = inet->inet_dport;
+ fl6->fl6_sport = inet->inet_sport;
+ fl6->flowlabel = np->flow_label;
+
+ if (!fl6->flowi6_oif)
+ fl6->flowi6_oif = np->sticky_pktinfo.ipi6_ifindex;
+
+ if (!fl6->flowi6_oif && ipv6_addr_is_multicast(&fl6->daddr))
+ fl6->flowi6_oif = np->mcast_oif;
+
+ security_sk_classify_flow(sk, flowi6_to_flowi(fl6));
+}
+
+int ip6_datagram_dst_update(struct sock *sk, bool fix_sk_saddr)
+{
+ struct ip6_flowlabel *flowlabel = NULL;
+ struct in6_addr *final_p, final;
+ struct ipv6_txoptions *opt;
+ struct dst_entry *dst;
+ struct inet_sock *inet = inet_sk(sk);
+ struct ipv6_pinfo *np = inet6_sk(sk);
+ struct flowi6 fl6;
+ int err = 0;
+
+ if (np->sndflow && (np->flow_label & IPV6_FLOWLABEL_MASK)) {
+ flowlabel = fl6_sock_lookup(sk, np->flow_label);
+ if (!flowlabel)
+ return -EINVAL;
+ }
+ ip6_datagram_flow_key_init(&fl6, sk);
+
+ rcu_read_lock();
+ opt = flowlabel ? flowlabel->opt : rcu_dereference(np->opt);
+ final_p = fl6_update_dst(&fl6, opt, &final);
+ rcu_read_unlock();
+
+ dst = ip6_dst_lookup_flow(sk, &fl6, final_p);
+ if (IS_ERR(dst)) {
+ err = PTR_ERR(dst);
+ goto out;
+ }
+
+ if (fix_sk_saddr) {
+ if (ipv6_addr_any(&np->saddr))
+ np->saddr = fl6.saddr;
+
+ if (ipv6_addr_any(&sk->sk_v6_rcv_saddr)) {
+ sk->sk_v6_rcv_saddr = fl6.saddr;
+ inet->inet_rcv_saddr = LOOPBACK4_IPV6;
+ if (sk->sk_prot->rehash)
+ sk->sk_prot->rehash(sk);
+ }
+ }
+
+ ip6_dst_store(sk, dst,
+ ipv6_addr_equal(&fl6.daddr, &sk->sk_v6_daddr) ?
+ &sk->sk_v6_daddr : NULL,
+#ifdef CONFIG_IPV6_SUBTREES
+ ipv6_addr_equal(&fl6.saddr, &np->saddr) ?
+ &np->saddr :
+#endif
+ NULL);
+
+out:
+ fl6_sock_release(flowlabel);
+ return err;
+}
+
+void ip6_datagram_release_cb(struct sock *sk)
+{
+ struct dst_entry *dst;
+
+ if (ipv6_addr_v4mapped(&sk->sk_v6_daddr))
+ return;
+
+ rcu_read_lock();
+ dst = __sk_dst_get(sk);
+ if (!dst || !dst->obsolete ||
+ dst->ops->check(dst, inet6_sk(sk)->dst_cookie)) {
+ rcu_read_unlock();
+ return;
+ }
+ rcu_read_unlock();
+
+ ip6_datagram_dst_update(sk, false);
+}
+EXPORT_SYMBOL_GPL(ip6_datagram_release_cb);
+
static int __ip6_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
{
struct sockaddr_in6 *usin = (struct sockaddr_in6 *) uaddr;
struct inet_sock *inet = inet_sk(sk);
struct ipv6_pinfo *np = inet6_sk(sk);
- struct in6_addr *daddr, *final_p, final;
- struct dst_entry *dst;
- struct flowi6 fl6;
- struct ip6_flowlabel *flowlabel = NULL;
- struct ipv6_txoptions *opt;
+ struct in6_addr *daddr;
int addr_type;
int err;
+ __be32 fl6_flowlabel = 0;
if (usin->sin6_family == AF_INET) {
if (__ipv6_only_sock(sk))
@@ -66,15 +162,8 @@ static int __ip6_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int a
if (usin->sin6_family != AF_INET6)
return -EAFNOSUPPORT;
- memset(&fl6, 0, sizeof(fl6));
- if (np->sndflow) {
- fl6.flowlabel = usin->sin6_flowinfo&IPV6_FLOWINFO_MASK;
- if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) {
- flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
- if (!flowlabel)
- return -EINVAL;
- }
- }
+ if (np->sndflow)
+ fl6_flowlabel = usin->sin6_flowinfo & IPV6_FLOWINFO_MASK;
addr_type = ipv6_addr_type(&usin->sin6_addr);
@@ -145,7 +234,7 @@ ipv4_connected:
}
sk->sk_v6_daddr = *daddr;
- np->flow_label = fl6.flowlabel;
+ np->flow_label = fl6_flowlabel;
inet->inet_dport = usin->sin6_port;
@@ -154,59 +243,13 @@ ipv4_connected:
* destination cache for it.
*/
- fl6.flowi6_proto = sk->sk_protocol;
- fl6.daddr = sk->sk_v6_daddr;
- fl6.saddr = np->saddr;
- fl6.flowi6_oif = sk->sk_bound_dev_if;
- fl6.flowi6_mark = sk->sk_mark;
- fl6.fl6_dport = inet->inet_dport;
- fl6.fl6_sport = inet->inet_sport;
-
- if (!fl6.flowi6_oif)
- fl6.flowi6_oif = np->sticky_pktinfo.ipi6_ifindex;
-
- if (!fl6.flowi6_oif && (addr_type&IPV6_ADDR_MULTICAST))
- fl6.flowi6_oif = np->mcast_oif;
-
- security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
-
- rcu_read_lock();
- opt = flowlabel ? flowlabel->opt : rcu_dereference(np->opt);
- final_p = fl6_update_dst(&fl6, opt, &final);
- rcu_read_unlock();
-
- dst = ip6_dst_lookup_flow(sk, &fl6, final_p);
- err = 0;
- if (IS_ERR(dst)) {
- err = PTR_ERR(dst);
+ err = ip6_datagram_dst_update(sk, true);
+ if (err)
goto out;
- }
-
- /* source address lookup done in ip6_dst_lookup */
-
- if (ipv6_addr_any(&np->saddr))
- np->saddr = fl6.saddr;
-
- if (ipv6_addr_any(&sk->sk_v6_rcv_saddr)) {
- sk->sk_v6_rcv_saddr = fl6.saddr;
- inet->inet_rcv_saddr = LOOPBACK4_IPV6;
- if (sk->sk_prot->rehash)
- sk->sk_prot->rehash(sk);
- }
-
- ip6_dst_store(sk, dst,
- ipv6_addr_equal(&fl6.daddr, &sk->sk_v6_daddr) ?
- &sk->sk_v6_daddr : NULL,
-#ifdef CONFIG_IPV6_SUBTREES
- ipv6_addr_equal(&fl6.saddr, &np->saddr) ?
- &np->saddr :
-#endif
- NULL);
sk->sk_state = TCP_ESTABLISHED;
sk_set_txhash(sk);
out:
- fl6_sock_release(flowlabel);
return err;
}