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path: root/net/ipv6/xfrm6_policy.c
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Diffstat (limited to 'net/ipv6/xfrm6_policy.c')
-rw-r--r--net/ipv6/xfrm6_policy.c124
1 files changed, 92 insertions, 32 deletions
diff --git a/net/ipv6/xfrm6_policy.c b/net/ipv6/xfrm6_policy.c
index 8ea65e03273..2a0bbda2c76 100644
--- a/net/ipv6/xfrm6_policy.c
+++ b/net/ipv6/xfrm6_policy.c
@@ -20,7 +20,7 @@
#include <net/ip.h>
#include <net/ipv6.h>
#include <net/ip6_route.h>
-#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
+#if IS_ENABLED(CONFIG_IPV6_MIP6)
#include <net/mip6.h>
#endif
@@ -73,6 +73,13 @@ static int xfrm6_get_tos(const struct flowi *fl)
return 0;
}
+static void xfrm6_init_dst(struct net *net, struct xfrm_dst *xdst)
+{
+ struct rt6_info *rt = (struct rt6_info *)xdst;
+
+ rt6_init_peer(rt, net->ipv6.peers);
+}
+
static int xfrm6_init_path(struct xfrm_dst *path, struct dst_entry *dst,
int nfheader_len)
{
@@ -96,12 +103,12 @@ static int xfrm6_fill_dst(struct xfrm_dst *xdst, struct net_device *dev,
dev_hold(dev);
xdst->u.rt6.rt6i_idev = in6_dev_get(dev);
- if (!xdst->u.rt6.rt6i_idev)
+ if (!xdst->u.rt6.rt6i_idev) {
+ dev_put(dev);
return -ENODEV;
+ }
- xdst->u.rt6.rt6i_peer = rt->rt6i_peer;
- if (rt->rt6i_peer)
- atomic_inc(&rt->rt6i_peer->refcnt);
+ rt6_transfer_peer(&xdst->u.rt6, rt);
/* Sheit... I remember I did this right. Apparently,
* it was magically lost, so this code needs audit */
@@ -128,9 +135,14 @@ _decode_session6(struct sk_buff *skb, struct flowi *fl, int reverse)
struct ipv6_opt_hdr *exthdr;
const unsigned char *nh = skb_network_header(skb);
u8 nexthdr = nh[IP6CB(skb)->nhoff];
+ int oif = 0;
+
+ if (skb_dst(skb))
+ oif = skb_dst(skb)->dev->ifindex;
memset(fl6, 0, sizeof(struct flowi6));
fl6->flowi6_mark = skb->mark;
+ fl6->flowi6_oif = reverse ? skb->skb_iif : oif;
fl6->daddr = reverse ? hdr->saddr : hdr->daddr;
fl6->saddr = reverse ? hdr->daddr : hdr->saddr;
@@ -176,7 +188,7 @@ _decode_session6(struct sk_buff *skb, struct flowi *fl, int reverse)
fl6->flowi6_proto = nexthdr;
return;
-#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
+#if IS_ENABLED(CONFIG_IPV6_MIP6)
case IPPROTO_MH:
if (!onlyproto && pskb_may_pull(skb, nh + offset + 3 - skb->data)) {
struct ip6_mh *mh;
@@ -208,12 +220,22 @@ static inline int xfrm6_garbage_collect(struct dst_ops *ops)
return dst_entries_get_fast(ops) > ops->gc_thresh * 2;
}
-static void xfrm6_update_pmtu(struct dst_entry *dst, u32 mtu)
+static void xfrm6_update_pmtu(struct dst_entry *dst, struct sock *sk,
+ struct sk_buff *skb, u32 mtu)
{
struct xfrm_dst *xdst = (struct xfrm_dst *)dst;
struct dst_entry *path = xdst->route;
- path->ops->update_pmtu(path, mtu);
+ path->ops->update_pmtu(path, sk, skb, mtu);
+}
+
+static void xfrm6_redirect(struct dst_entry *dst, struct sock *sk,
+ struct sk_buff *skb)
+{
+ struct xfrm_dst *xdst = (struct xfrm_dst *)dst;
+ struct dst_entry *path = xdst->route;
+
+ path->ops->redirect(path, sk, skb);
}
static void xfrm6_dst_destroy(struct dst_entry *dst)
@@ -223,8 +245,10 @@ static void xfrm6_dst_destroy(struct dst_entry *dst)
if (likely(xdst->u.rt6.rt6i_idev))
in6_dev_put(xdst->u.rt6.rt6i_idev);
dst_destroy_metrics_generic(dst);
- if (likely(xdst->u.rt6.rt6i_peer))
- inet_putpeer(xdst->u.rt6.rt6i_peer);
+ if (rt6_has_peer(&xdst->u.rt6)) {
+ struct inet_peer *peer = rt6_peer_ptr(&xdst->u.rt6);
+ inet_putpeer(peer);
+ }
xfrm_dst_destroy(xdst);
}
@@ -260,11 +284,12 @@ static struct dst_ops xfrm6_dst_ops = {
.protocol = cpu_to_be16(ETH_P_IPV6),
.gc = xfrm6_garbage_collect,
.update_pmtu = xfrm6_update_pmtu,
+ .redirect = xfrm6_redirect,
.cow_metrics = dst_cow_metrics_generic,
.destroy = xfrm6_dst_destroy,
.ifdown = xfrm6_dst_ifdown,
.local_out = __ip6_local_out,
- .gc_thresh = 1024,
+ .gc_thresh = 32768,
};
static struct xfrm_policy_afinfo xfrm6_policy_afinfo = {
@@ -274,6 +299,7 @@ static struct xfrm_policy_afinfo xfrm6_policy_afinfo = {
.get_saddr = xfrm6_get_saddr,
.decode_session = _decode_session6,
.get_tos = xfrm6_get_tos,
+ .init_dst = xfrm6_init_dst,
.init_path = xfrm6_init_path,
.fill_dst = xfrm6_fill_dst,
.blackhole_route = ip6_blackhole_route,
@@ -301,27 +327,57 @@ static struct ctl_table xfrm6_policy_table[] = {
{ }
};
-static struct ctl_table_header *sysctl_hdr;
+static int __net_init xfrm6_net_init(struct net *net)
+{
+ struct ctl_table *table;
+ struct ctl_table_header *hdr;
+
+ table = xfrm6_policy_table;
+ if (!net_eq(net, &init_net)) {
+ table = kmemdup(table, sizeof(xfrm6_policy_table), GFP_KERNEL);
+ if (!table)
+ goto err_alloc;
+
+ table[0].data = &net->xfrm.xfrm6_dst_ops.gc_thresh;
+ }
+
+ hdr = register_net_sysctl(net, "net/ipv6", table);
+ if (!hdr)
+ goto err_reg;
+
+ net->ipv6.sysctl.xfrm6_hdr = hdr;
+ return 0;
+
+err_reg:
+ if (!net_eq(net, &init_net))
+ kfree(table);
+err_alloc:
+ return -ENOMEM;
+}
+
+static void __net_exit xfrm6_net_exit(struct net *net)
+{
+ struct ctl_table *table;
+
+ if (net->ipv6.sysctl.xfrm6_hdr == NULL)
+ return;
+
+ table = net->ipv6.sysctl.xfrm6_hdr->ctl_table_arg;
+ unregister_net_sysctl_table(net->ipv6.sysctl.xfrm6_hdr);
+ if (!net_eq(net, &init_net))
+ kfree(table);
+}
+
+static struct pernet_operations xfrm6_net_ops = {
+ .init = xfrm6_net_init,
+ .exit = xfrm6_net_exit,
+};
#endif
int __init xfrm6_init(void)
{
int ret;
- unsigned int gc_thresh;
-
- /*
- * We need a good default value for the xfrm6 gc threshold.
- * In ipv4 we set it to the route hash table size * 8, which
- * is half the size of the maximaum route cache for ipv4. It
- * would be good to do the same thing for v6, except the table is
- * constructed differently here. Here each table for a net namespace
- * can have FIB_TABLE_HASHSZ entries, so lets go with the same
- * computation that we used for ipv4 here. Also, lets keep the initial
- * gc_thresh to a minimum of 1024, since, the ipv6 route cache defaults
- * to that as a minimum as well
- */
- gc_thresh = FIB6_TABLE_HASHSZ * 8;
- xfrm6_dst_ops.gc_thresh = (gc_thresh < 1024) ? 1024 : gc_thresh;
+
dst_entries_init(&xfrm6_dst_ops);
ret = xfrm6_policy_init();
@@ -333,12 +389,17 @@ int __init xfrm6_init(void)
if (ret)
goto out_policy;
+ ret = xfrm6_protocol_init();
+ if (ret)
+ goto out_state;
+
#ifdef CONFIG_SYSCTL
- sysctl_hdr = register_net_sysctl_table(&init_net, net_ipv6_ctl_path,
- xfrm6_policy_table);
+ register_pernet_subsys(&xfrm6_net_ops);
#endif
out:
return ret;
+out_state:
+ xfrm6_state_fini();
out_policy:
xfrm6_policy_fini();
goto out;
@@ -347,10 +408,9 @@ out_policy:
void xfrm6_fini(void)
{
#ifdef CONFIG_SYSCTL
- if (sysctl_hdr)
- unregister_net_sysctl_table(sysctl_hdr);
+ unregister_pernet_subsys(&xfrm6_net_ops);
#endif
- //xfrm6_input_fini();
+ xfrm6_protocol_fini();
xfrm6_policy_fini();
xfrm6_state_fini();
dst_entries_destroy(&xfrm6_dst_ops);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 22:40:30 +0000