mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-06 00:26:40 +07:00
c53ac41e37
No external dependencies, might as well handle this directly. xfrm_afinfo_policy is now 40 bytes on x86_64. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
308 lines
6.7 KiB
C
308 lines
6.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* xfrm6_policy.c: based on xfrm4_policy.c
|
|
*
|
|
* Authors:
|
|
* Mitsuru KANDA @USAGI
|
|
* Kazunori MIYAZAWA @USAGI
|
|
* Kunihiro Ishiguro <kunihiro@ipinfusion.com>
|
|
* IPv6 support
|
|
* YOSHIFUJI Hideaki
|
|
* Split up af-specific portion
|
|
*
|
|
*/
|
|
|
|
#include <linux/err.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/netdevice.h>
|
|
#include <net/addrconf.h>
|
|
#include <net/dst.h>
|
|
#include <net/xfrm.h>
|
|
#include <net/ip.h>
|
|
#include <net/ipv6.h>
|
|
#include <net/ip6_route.h>
|
|
#include <net/l3mdev.h>
|
|
|
|
static struct dst_entry *xfrm6_dst_lookup(struct net *net, int tos, int oif,
|
|
const xfrm_address_t *saddr,
|
|
const xfrm_address_t *daddr,
|
|
u32 mark)
|
|
{
|
|
struct flowi6 fl6;
|
|
struct dst_entry *dst;
|
|
int err;
|
|
|
|
memset(&fl6, 0, sizeof(fl6));
|
|
fl6.flowi6_oif = l3mdev_master_ifindex_by_index(net, oif);
|
|
fl6.flowi6_flags = FLOWI_FLAG_SKIP_NH_OIF;
|
|
fl6.flowi6_mark = mark;
|
|
memcpy(&fl6.daddr, daddr, sizeof(fl6.daddr));
|
|
if (saddr)
|
|
memcpy(&fl6.saddr, saddr, sizeof(fl6.saddr));
|
|
|
|
dst = ip6_route_output(net, NULL, &fl6);
|
|
|
|
err = dst->error;
|
|
if (dst->error) {
|
|
dst_release(dst);
|
|
dst = ERR_PTR(err);
|
|
}
|
|
|
|
return dst;
|
|
}
|
|
|
|
static int xfrm6_get_saddr(struct net *net, int oif,
|
|
xfrm_address_t *saddr, xfrm_address_t *daddr,
|
|
u32 mark)
|
|
{
|
|
struct dst_entry *dst;
|
|
struct net_device *dev;
|
|
|
|
dst = xfrm6_dst_lookup(net, 0, oif, NULL, daddr, mark);
|
|
if (IS_ERR(dst))
|
|
return -EHOSTUNREACH;
|
|
|
|
dev = ip6_dst_idev(dst)->dev;
|
|
ipv6_dev_get_saddr(dev_net(dev), dev, &daddr->in6, 0, &saddr->in6);
|
|
dst_release(dst);
|
|
return 0;
|
|
}
|
|
|
|
static int xfrm6_fill_dst(struct xfrm_dst *xdst, struct net_device *dev,
|
|
const struct flowi *fl)
|
|
{
|
|
struct rt6_info *rt = (struct rt6_info *)xdst->route;
|
|
|
|
xdst->u.dst.dev = dev;
|
|
dev_hold(dev);
|
|
|
|
xdst->u.rt6.rt6i_idev = in6_dev_get(dev);
|
|
if (!xdst->u.rt6.rt6i_idev) {
|
|
dev_put(dev);
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* Sheit... I remember I did this right. Apparently,
|
|
* it was magically lost, so this code needs audit */
|
|
xdst->u.rt6.rt6i_flags = rt->rt6i_flags & (RTF_ANYCAST |
|
|
RTF_LOCAL);
|
|
xdst->route_cookie = rt6_get_cookie(rt);
|
|
xdst->u.rt6.rt6i_gateway = rt->rt6i_gateway;
|
|
xdst->u.rt6.rt6i_dst = rt->rt6i_dst;
|
|
xdst->u.rt6.rt6i_src = rt->rt6i_src;
|
|
INIT_LIST_HEAD(&xdst->u.rt6.rt6i_uncached);
|
|
rt6_uncached_list_add(&xdst->u.rt6);
|
|
atomic_inc(&dev_net(dev)->ipv6.rt6_stats->fib_rt_uncache);
|
|
|
|
return 0;
|
|
}
|
|
|
|
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, 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)
|
|
{
|
|
struct xfrm_dst *xdst = (struct xfrm_dst *)dst;
|
|
|
|
if (likely(xdst->u.rt6.rt6i_idev))
|
|
in6_dev_put(xdst->u.rt6.rt6i_idev);
|
|
dst_destroy_metrics_generic(dst);
|
|
if (xdst->u.rt6.rt6i_uncached_list)
|
|
rt6_uncached_list_del(&xdst->u.rt6);
|
|
xfrm_dst_destroy(xdst);
|
|
}
|
|
|
|
static void xfrm6_dst_ifdown(struct dst_entry *dst, struct net_device *dev,
|
|
int unregister)
|
|
{
|
|
struct xfrm_dst *xdst;
|
|
|
|
if (!unregister)
|
|
return;
|
|
|
|
xdst = (struct xfrm_dst *)dst;
|
|
if (xdst->u.rt6.rt6i_idev->dev == dev) {
|
|
struct inet6_dev *loopback_idev =
|
|
in6_dev_get(dev_net(dev)->loopback_dev);
|
|
|
|
do {
|
|
in6_dev_put(xdst->u.rt6.rt6i_idev);
|
|
xdst->u.rt6.rt6i_idev = loopback_idev;
|
|
in6_dev_hold(loopback_idev);
|
|
xdst = (struct xfrm_dst *)xfrm_dst_child(&xdst->u.dst);
|
|
} while (xdst->u.dst.xfrm);
|
|
|
|
__in6_dev_put(loopback_idev);
|
|
}
|
|
|
|
xfrm_dst_ifdown(dst, dev);
|
|
}
|
|
|
|
static struct dst_ops xfrm6_dst_ops_template = {
|
|
.family = AF_INET6,
|
|
.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 = 32768,
|
|
};
|
|
|
|
static const struct xfrm_policy_afinfo xfrm6_policy_afinfo = {
|
|
.dst_ops = &xfrm6_dst_ops_template,
|
|
.dst_lookup = xfrm6_dst_lookup,
|
|
.get_saddr = xfrm6_get_saddr,
|
|
.fill_dst = xfrm6_fill_dst,
|
|
.blackhole_route = ip6_blackhole_route,
|
|
};
|
|
|
|
static int __init xfrm6_policy_init(void)
|
|
{
|
|
return xfrm_policy_register_afinfo(&xfrm6_policy_afinfo, AF_INET6);
|
|
}
|
|
|
|
static void xfrm6_policy_fini(void)
|
|
{
|
|
xfrm_policy_unregister_afinfo(&xfrm6_policy_afinfo);
|
|
}
|
|
|
|
#ifdef CONFIG_SYSCTL
|
|
static struct ctl_table xfrm6_policy_table[] = {
|
|
{
|
|
.procname = "xfrm6_gc_thresh",
|
|
.data = &init_net.xfrm.xfrm6_dst_ops.gc_thresh,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{ }
|
|
};
|
|
|
|
static int __net_init xfrm6_net_sysctl_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_sysctl_exit(struct net *net)
|
|
{
|
|
struct ctl_table *table;
|
|
|
|
if (!net->ipv6.sysctl.xfrm6_hdr)
|
|
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);
|
|
}
|
|
#else /* CONFIG_SYSCTL */
|
|
static inline int xfrm6_net_sysctl_init(struct net *net)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void xfrm6_net_sysctl_exit(struct net *net)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
static int __net_init xfrm6_net_init(struct net *net)
|
|
{
|
|
int ret;
|
|
|
|
memcpy(&net->xfrm.xfrm6_dst_ops, &xfrm6_dst_ops_template,
|
|
sizeof(xfrm6_dst_ops_template));
|
|
ret = dst_entries_init(&net->xfrm.xfrm6_dst_ops);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = xfrm6_net_sysctl_init(net);
|
|
if (ret)
|
|
dst_entries_destroy(&net->xfrm.xfrm6_dst_ops);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void __net_exit xfrm6_net_exit(struct net *net)
|
|
{
|
|
xfrm6_net_sysctl_exit(net);
|
|
dst_entries_destroy(&net->xfrm.xfrm6_dst_ops);
|
|
}
|
|
|
|
static struct pernet_operations xfrm6_net_ops = {
|
|
.init = xfrm6_net_init,
|
|
.exit = xfrm6_net_exit,
|
|
};
|
|
|
|
int __init xfrm6_init(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = xfrm6_policy_init();
|
|
if (ret)
|
|
goto out;
|
|
ret = xfrm6_state_init();
|
|
if (ret)
|
|
goto out_policy;
|
|
|
|
ret = xfrm6_protocol_init();
|
|
if (ret)
|
|
goto out_state;
|
|
|
|
register_pernet_subsys(&xfrm6_net_ops);
|
|
out:
|
|
return ret;
|
|
out_state:
|
|
xfrm6_state_fini();
|
|
out_policy:
|
|
xfrm6_policy_fini();
|
|
goto out;
|
|
}
|
|
|
|
void xfrm6_fini(void)
|
|
{
|
|
unregister_pernet_subsys(&xfrm6_net_ops);
|
|
xfrm6_protocol_fini();
|
|
xfrm6_policy_fini();
|
|
xfrm6_state_fini();
|
|
}
|