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Diffstat (limited to 'net/ipv6/route.c')
-rw-r--r--net/ipv6/route.c105
1 files changed, 71 insertions, 34 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 496b62712fe..bc4888d902b 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -62,7 +62,7 @@
#include <linux/sysctl.h>
#endif
-static struct rt6_info *ip6_rt_copy(const struct rt6_info *ort,
+static struct rt6_info *ip6_rt_copy(struct rt6_info *ort,
const struct in6_addr *dest);
static struct dst_entry *ip6_dst_check(struct dst_entry *dst, u32 cookie);
static unsigned int ip6_default_advmss(const struct dst_entry *dst);
@@ -285,6 +285,10 @@ static void ip6_dst_destroy(struct dst_entry *dst)
rt->rt6i_idev = NULL;
in6_dev_put(idev);
}
+
+ if (!(rt->rt6i_flags & RTF_EXPIRES) && dst->from)
+ dst_release(dst->from);
+
if (peer) {
rt->rt6i_peer = NULL;
inet_putpeer(peer);
@@ -329,8 +333,17 @@ static void ip6_dst_ifdown(struct dst_entry *dst, struct net_device *dev,
static __inline__ int rt6_check_expired(const struct rt6_info *rt)
{
- return (rt->rt6i_flags & RTF_EXPIRES) &&
- time_after(jiffies, rt->dst.expires);
+ struct rt6_info *ort = NULL;
+
+ if (rt->rt6i_flags & RTF_EXPIRES) {
+ if (time_after(jiffies, rt->dst.expires))
+ return 1;
+ } else if (rt->dst.from) {
+ ort = (struct rt6_info *) rt->dst.from;
+ return (ort->rt6i_flags & RTF_EXPIRES) &&
+ time_after(jiffies, ort->dst.expires);
+ }
+ return 0;
}
static inline int rt6_need_strict(const struct in6_addr *daddr)
@@ -620,12 +633,11 @@ int rt6_route_rcv(struct net_device *dev, u8 *opt, int len,
(rt->rt6i_flags & ~RTF_PREF_MASK) | RTF_PREF(pref);
if (rt) {
- if (!addrconf_finite_timeout(lifetime)) {
- rt->rt6i_flags &= ~RTF_EXPIRES;
- } else {
- rt->dst.expires = jiffies + HZ * lifetime;
- rt->rt6i_flags |= RTF_EXPIRES;
- }
+ if (!addrconf_finite_timeout(lifetime))
+ rt6_clean_expires(rt);
+ else
+ rt6_set_expires(rt, jiffies + HZ * lifetime);
+
dst_release(&rt->dst);
}
return 0;
@@ -730,7 +742,7 @@ int ip6_ins_rt(struct rt6_info *rt)
return __ip6_ins_rt(rt, &info);
}
-static struct rt6_info *rt6_alloc_cow(const struct rt6_info *ort,
+static struct rt6_info *rt6_alloc_cow(struct rt6_info *ort,
const struct in6_addr *daddr,
const struct in6_addr *saddr)
{
@@ -881,6 +893,16 @@ static struct rt6_info *ip6_pol_route_input(struct net *net, struct fib6_table *
return ip6_pol_route(net, table, fl6->flowi6_iif, fl6, flags);
}
+static struct dst_entry *ip6_route_input_lookup(struct net *net,
+ struct net_device *dev,
+ struct flowi6 *fl6, int flags)
+{
+ if (rt6_need_strict(&fl6->daddr) && dev->type != ARPHRD_PIMREG)
+ flags |= RT6_LOOKUP_F_IFACE;
+
+ return fib6_rule_lookup(net, fl6, flags, ip6_pol_route_input);
+}
+
void ip6_route_input(struct sk_buff *skb)
{
const struct ipv6hdr *iph = ipv6_hdr(skb);
@@ -895,10 +917,7 @@ void ip6_route_input(struct sk_buff *skb)
.flowi6_proto = iph->nexthdr,
};
- if (rt6_need_strict(&iph->daddr) && skb->dev->type != ARPHRD_PIMREG)
- flags |= RT6_LOOKUP_F_IFACE;
-
- skb_dst_set(skb, fib6_rule_lookup(net, &fl6, flags, ip6_pol_route_input));
+ skb_dst_set(skb, ip6_route_input_lookup(net, skb->dev, &fl6, flags));
}
static struct rt6_info *ip6_pol_route_output(struct net *net, struct fib6_table *table,
@@ -947,10 +966,10 @@ struct dst_entry *ip6_blackhole_route(struct net *net, struct dst_entry *dst_ori
rt->rt6i_idev = ort->rt6i_idev;
if (rt->rt6i_idev)
in6_dev_hold(rt->rt6i_idev);
- rt->dst.expires = 0;
rt->rt6i_gateway = ort->rt6i_gateway;
- rt->rt6i_flags = ort->rt6i_flags & ~RTF_EXPIRES;
+ rt->rt6i_flags = ort->rt6i_flags;
+ rt6_clean_expires(rt);
rt->rt6i_metric = 0;
memcpy(&rt->rt6i_dst, &ort->rt6i_dst, sizeof(struct rt6key));
@@ -1012,10 +1031,9 @@ static void ip6_link_failure(struct sk_buff *skb)
rt = (struct rt6_info *) skb_dst(skb);
if (rt) {
- if (rt->rt6i_flags & RTF_CACHE) {
- dst_set_expires(&rt->dst, 0);
- rt->rt6i_flags |= RTF_EXPIRES;
- } else if (rt->rt6i_node && (rt->rt6i_flags & RTF_DEFAULT))
+ if (rt->rt6i_flags & RTF_CACHE)
+ rt6_update_expires(rt, 0);
+ else if (rt->rt6i_node && (rt->rt6i_flags & RTF_DEFAULT))
rt->rt6i_node->fn_sernum = -1;
}
}
@@ -1282,9 +1300,12 @@ int ip6_route_add(struct fib6_config *cfg)
}
rt->dst.obsolete = -1;
- rt->dst.expires = (cfg->fc_flags & RTF_EXPIRES) ?
- jiffies + clock_t_to_jiffies(cfg->fc_expires) :
- 0;
+
+ if (cfg->fc_flags & RTF_EXPIRES)
+ rt6_set_expires(rt, jiffies +
+ clock_t_to_jiffies(cfg->fc_expires));
+ else
+ rt6_clean_expires(rt);
if (cfg->fc_protocol == RTPROT_UNSPEC)
cfg->fc_protocol = RTPROT_BOOT;
@@ -1729,8 +1750,8 @@ again:
features |= RTAX_FEATURE_ALLFRAG;
dst_metric_set(&rt->dst, RTAX_FEATURES, features);
}
- dst_set_expires(&rt->dst, net->ipv6.sysctl.ip6_rt_mtu_expires);
- rt->rt6i_flags |= RTF_MODIFIED|RTF_EXPIRES;
+ rt6_update_expires(rt, net->ipv6.sysctl.ip6_rt_mtu_expires);
+ rt->rt6i_flags |= RTF_MODIFIED;
goto out;
}
@@ -1758,9 +1779,8 @@ again:
* which is 10 mins. After 10 mins the decreased pmtu is expired
* and detecting PMTU increase will be automatically happened.
*/
- dst_set_expires(&nrt->dst, net->ipv6.sysctl.ip6_rt_mtu_expires);
- nrt->rt6i_flags |= RTF_DYNAMIC|RTF_EXPIRES;
-
+ rt6_update_expires(nrt, net->ipv6.sysctl.ip6_rt_mtu_expires);
+ nrt->rt6i_flags |= RTF_DYNAMIC;
ip6_ins_rt(nrt);
}
out:
@@ -1792,7 +1812,7 @@ void rt6_pmtu_discovery(const struct in6_addr *daddr, const struct in6_addr *sad
* Misc support functions
*/
-static struct rt6_info *ip6_rt_copy(const struct rt6_info *ort,
+static struct rt6_info *ip6_rt_copy(struct rt6_info *ort,
const struct in6_addr *dest)
{
struct net *net = dev_net(ort->dst.dev);
@@ -1812,10 +1832,14 @@ static struct rt6_info *ip6_rt_copy(const struct rt6_info *ort,
if (rt->rt6i_idev)
in6_dev_hold(rt->rt6i_idev);
rt->dst.lastuse = jiffies;
- rt->dst.expires = 0;
rt->rt6i_gateway = ort->rt6i_gateway;
- rt->rt6i_flags = ort->rt6i_flags & ~RTF_EXPIRES;
+ rt->rt6i_flags = ort->rt6i_flags;
+ if ((ort->rt6i_flags & (RTF_DEFAULT | RTF_ADDRCONF)) ==
+ (RTF_DEFAULT | RTF_ADDRCONF))
+ rt6_set_from(rt, ort);
+ else
+ rt6_clean_expires(rt);
rt->rt6i_metric = 0;
#ifdef CONFIG_IPV6_SUBTREES
@@ -2537,7 +2561,7 @@ static int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void
struct sk_buff *skb;
struct rtmsg *rtm;
struct flowi6 fl6;
- int err, iif = 0;
+ int err, iif = 0, oif = 0;
err = nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX, rtm_ipv6_policy);
if (err < 0)
@@ -2564,15 +2588,29 @@ static int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void
iif = nla_get_u32(tb[RTA_IIF]);
if (tb[RTA_OIF])
- fl6.flowi6_oif = nla_get_u32(tb[RTA_OIF]);
+ oif = nla_get_u32(tb[RTA_OIF]);
if (iif) {
struct net_device *dev;
+ int flags = 0;
+
dev = __dev_get_by_index(net, iif);
if (!dev) {
err = -ENODEV;
goto errout;
}
+
+ fl6.flowi6_iif = iif;
+
+ if (!ipv6_addr_any(&fl6.saddr))
+ flags |= RT6_LOOKUP_F_HAS_SADDR;
+
+ rt = (struct rt6_info *)ip6_route_input_lookup(net, dev, &fl6,
+ flags);
+ } else {
+ fl6.flowi6_oif = oif;
+
+ rt = (struct rt6_info *)ip6_route_output(net, NULL, &fl6);
}
skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
@@ -2587,7 +2625,6 @@ static int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void
skb_reset_mac_header(skb);
skb_reserve(skb, MAX_HEADER + sizeof(struct ipv6hdr));
- rt = (struct rt6_info*) ip6_route_output(net, NULL, &fl6);
skb_dst_set(skb, &rt->dst);
err = rt6_fill_node(net, skb, rt, &fl6.daddr, &fl6.saddr, iif,
generated by cgit v1.2.3-70-g09d2 (git 2.51.2) at 2025-11-04 00:42:59 +0000