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Diffstat (limited to 'net/ipv6/route.c')
-rw-r--r--net/ipv6/route.c57
1 files changed, 29 insertions, 28 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 1f4b935a0e57..8d5257c3f084 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -87,7 +87,8 @@ struct dst_entry *ip6_dst_check(struct dst_entry *dst, u32 cookie);
static unsigned int ip6_default_advmss(const struct dst_entry *dst);
INDIRECT_CALLABLE_SCOPE
unsigned int ip6_mtu(const struct dst_entry *dst);
-static struct dst_entry *ip6_negative_advice(struct dst_entry *);
+static void ip6_negative_advice(struct sock *sk,
+ struct dst_entry *dst);
static void ip6_dst_destroy(struct dst_entry *);
static void ip6_dst_ifdown(struct dst_entry *,
struct net_device *dev);
@@ -226,7 +227,7 @@ static struct neighbour *ip6_dst_neigh_lookup(const struct dst_entry *dst,
struct sk_buff *skb,
const void *daddr)
{
- const struct rt6_info *rt = container_of(dst, struct rt6_info, dst);
+ const struct rt6_info *rt = dst_rt6_info(dst);
return ip6_neigh_lookup(rt6_nexthop(rt, &in6addr_any),
dst->dev, skb, daddr);
@@ -234,8 +235,8 @@ static struct neighbour *ip6_dst_neigh_lookup(const struct dst_entry *dst,
static void ip6_confirm_neigh(const struct dst_entry *dst, const void *daddr)
{
+ const struct rt6_info *rt = dst_rt6_info(dst);
struct net_device *dev = dst->dev;
- struct rt6_info *rt = (struct rt6_info *)dst;
daddr = choose_neigh_daddr(rt6_nexthop(rt, &in6addr_any), NULL, daddr);
if (!daddr)
@@ -354,7 +355,7 @@ EXPORT_SYMBOL(ip6_dst_alloc);
static void ip6_dst_destroy(struct dst_entry *dst)
{
- struct rt6_info *rt = (struct rt6_info *)dst;
+ struct rt6_info *rt = dst_rt6_info(dst);
struct fib6_info *from;
struct inet6_dev *idev;
@@ -373,7 +374,7 @@ static void ip6_dst_destroy(struct dst_entry *dst)
static void ip6_dst_ifdown(struct dst_entry *dst, struct net_device *dev)
{
- struct rt6_info *rt = (struct rt6_info *)dst;
+ struct rt6_info *rt = dst_rt6_info(dst);
struct inet6_dev *idev = rt->rt6i_idev;
if (idev && idev->dev != blackhole_netdev) {
@@ -1288,7 +1289,7 @@ struct rt6_info *rt6_lookup(struct net *net, const struct in6_addr *daddr,
dst = fib6_rule_lookup(net, &fl6, skb, flags, ip6_pol_route_lookup);
if (dst->error == 0)
- return (struct rt6_info *) dst;
+ return dst_rt6_info(dst);
dst_release(dst);
@@ -2647,7 +2648,7 @@ struct dst_entry *ip6_route_output_flags(struct net *net,
rcu_read_lock();
dst = ip6_route_output_flags_noref(net, sk, fl6, flags);
- rt6 = (struct rt6_info *)dst;
+ rt6 = dst_rt6_info(dst);
/* For dst cached in uncached_list, refcnt is already taken. */
if (list_empty(&rt6->dst.rt_uncached) && !dst_hold_safe(dst)) {
dst = &net->ipv6.ip6_null_entry->dst;
@@ -2661,7 +2662,7 @@ EXPORT_SYMBOL_GPL(ip6_route_output_flags);
struct dst_entry *ip6_blackhole_route(struct net *net, struct dst_entry *dst_orig)
{
- struct rt6_info *rt, *ort = (struct rt6_info *) dst_orig;
+ struct rt6_info *rt, *ort = dst_rt6_info(dst_orig);
struct net_device *loopback_dev = net->loopback_dev;
struct dst_entry *new = NULL;
@@ -2744,7 +2745,7 @@ INDIRECT_CALLABLE_SCOPE struct dst_entry *ip6_dst_check(struct dst_entry *dst,
struct fib6_info *from;
struct rt6_info *rt;
- rt = container_of(dst, struct rt6_info, dst);
+ rt = dst_rt6_info(dst);
if (rt->sernum)
return rt6_is_valid(rt) ? dst : NULL;
@@ -2770,24 +2771,24 @@ INDIRECT_CALLABLE_SCOPE struct dst_entry *ip6_dst_check(struct dst_entry *dst,
}
EXPORT_INDIRECT_CALLABLE(ip6_dst_check);
-static struct dst_entry *ip6_negative_advice(struct dst_entry *dst)
+static void ip6_negative_advice(struct sock *sk,
+ struct dst_entry *dst)
{
- struct rt6_info *rt = (struct rt6_info *) dst;
+ struct rt6_info *rt = dst_rt6_info(dst);
- if (rt) {
- if (rt->rt6i_flags & RTF_CACHE) {
- rcu_read_lock();
- if (rt6_check_expired(rt)) {
- rt6_remove_exception_rt(rt);
- dst = NULL;
- }
- rcu_read_unlock();
- } else {
- dst_release(dst);
- dst = NULL;
+ if (rt->rt6i_flags & RTF_CACHE) {
+ rcu_read_lock();
+ if (rt6_check_expired(rt)) {
+ /* counteract the dst_release() in sk_dst_reset() */
+ dst_hold(dst);
+ sk_dst_reset(sk);
+
+ rt6_remove_exception_rt(rt);
}
+ rcu_read_unlock();
+ return;
}
- return dst;
+ sk_dst_reset(sk);
}
static void ip6_link_failure(struct sk_buff *skb)
@@ -2796,7 +2797,7 @@ static void ip6_link_failure(struct sk_buff *skb)
icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_ADDR_UNREACH, 0);
- rt = (struct rt6_info *) skb_dst(skb);
+ rt = dst_rt6_info(skb_dst(skb));
if (rt) {
rcu_read_lock();
if (rt->rt6i_flags & RTF_CACHE) {
@@ -2852,7 +2853,7 @@ static void __ip6_rt_update_pmtu(struct dst_entry *dst, const struct sock *sk,
bool confirm_neigh)
{
const struct in6_addr *daddr, *saddr;
- struct rt6_info *rt6 = (struct rt6_info *)dst;
+ struct rt6_info *rt6 = dst_rt6_info(dst);
/* Note: do *NOT* check dst_metric_locked(dst, RTAX_MTU)
* IPv6 pmtu discovery isn't optional, so 'mtu lock' cannot disable it.
@@ -4174,7 +4175,7 @@ static void rt6_do_redirect(struct dst_entry *dst, struct sock *sk, struct sk_bu
}
}
- rt = (struct rt6_info *) dst;
+ rt = dst_rt6_info(dst);
if (rt->rt6i_flags & RTF_REJECT) {
net_dbg_ratelimited("rt6_redirect: source isn't a valid nexthop for redirect target\n");
return;
@@ -5608,7 +5609,7 @@ static int rt6_fill_node(struct net *net, struct sk_buff *skb,
int iif, int type, u32 portid, u32 seq,
unsigned int flags)
{
- struct rt6_info *rt6 = (struct rt6_info *)dst;
+ struct rt6_info *rt6 = dst_rt6_info(dst);
struct rt6key *rt6_dst, *rt6_src;
u32 *pmetrics, table, rt6_flags;
unsigned char nh_flags = 0;
@@ -6111,7 +6112,7 @@ static int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr *nlh,
}
- rt = container_of(dst, struct rt6_info, dst);
+ rt = dst_rt6_info(dst);
if (rt->dst.error) {
err = rt->dst.error;
ip6_rt_put(rt);
generated by cgit v1.2.3 (git 2.39.0) at 2024-06-27 10:20:40 +0300