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Diffstat (limited to 'net/ipv6/route.c')
-rw-r--r--net/ipv6/route.c166
1 files changed, 119 insertions, 47 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 843406f14d7..de2b1decd78 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -89,12 +89,12 @@ static void ip6_rt_update_pmtu(struct dst_entry *dst, u32 mtu);
#ifdef CONFIG_IPV6_ROUTE_INFO
static struct rt6_info *rt6_add_route_info(struct net *net,
- struct in6_addr *prefix, int prefixlen,
- struct in6_addr *gwaddr, int ifindex,
+ const struct in6_addr *prefix, int prefixlen,
+ const struct in6_addr *gwaddr, int ifindex,
unsigned pref);
static struct rt6_info *rt6_get_route_info(struct net *net,
- struct in6_addr *prefix, int prefixlen,
- struct in6_addr *gwaddr, int ifindex);
+ const struct in6_addr *prefix, int prefixlen,
+ const struct in6_addr *gwaddr, int ifindex);
#endif
static u32 *ipv6_cow_metrics(struct dst_entry *dst, unsigned long old)
@@ -153,6 +153,12 @@ static void ip6_rt_blackhole_update_pmtu(struct dst_entry *dst, u32 mtu)
{
}
+static u32 *ip6_rt_blackhole_cow_metrics(struct dst_entry *dst,
+ unsigned long old)
+{
+ return NULL;
+}
+
static struct dst_ops ip6_dst_blackhole_ops = {
.family = AF_INET6,
.protocol = cpu_to_be16(ETH_P_IPV6),
@@ -161,6 +167,7 @@ static struct dst_ops ip6_dst_blackhole_ops = {
.default_mtu = ip6_blackhole_default_mtu,
.default_advmss = ip6_default_advmss,
.update_pmtu = ip6_rt_blackhole_update_pmtu,
+ .cow_metrics = ip6_rt_blackhole_cow_metrics,
};
static const u32 ip6_template_metrics[RTAX_MAX] = {
@@ -220,9 +227,14 @@ static struct rt6_info ip6_blk_hole_entry_template = {
#endif
/* allocate dst with ip6_dst_ops */
-static inline struct rt6_info *ip6_dst_alloc(struct dst_ops *ops)
+static inline struct rt6_info *ip6_dst_alloc(struct dst_ops *ops,
+ struct net_device *dev)
{
- return (struct rt6_info *)dst_alloc(ops, 0);
+ struct rt6_info *rt = dst_alloc(ops, dev, 0, 0, 0);
+
+ memset(&rt->rt6i_table, 0, sizeof(*rt) - sizeof(struct dst_entry));
+
+ return rt;
}
static void ip6_dst_destroy(struct dst_entry *dst)
@@ -283,7 +295,7 @@ static __inline__ int rt6_check_expired(const struct rt6_info *rt)
time_after(jiffies, rt->rt6i_expires);
}
-static inline int rt6_need_strict(struct in6_addr *daddr)
+static inline int rt6_need_strict(const struct in6_addr *daddr)
{
return ipv6_addr_type(daddr) &
(IPV6_ADDR_MULTICAST | IPV6_ADDR_LINKLOCAL | IPV6_ADDR_LOOPBACK);
@@ -295,7 +307,7 @@ static inline int rt6_need_strict(struct in6_addr *daddr)
static inline struct rt6_info *rt6_device_match(struct net *net,
struct rt6_info *rt,
- struct in6_addr *saddr,
+ const struct in6_addr *saddr,
int oif,
int flags)
{
@@ -507,7 +519,7 @@ static struct rt6_info *rt6_select(struct fib6_node *fn, int oif, int strict)
#ifdef CONFIG_IPV6_ROUTE_INFO
int rt6_route_rcv(struct net_device *dev, u8 *opt, int len,
- struct in6_addr *gwaddr)
+ const struct in6_addr *gwaddr)
{
struct net *net = dev_net(dev);
struct route_info *rinfo = (struct route_info *) opt;
@@ -670,8 +682,8 @@ int ip6_ins_rt(struct rt6_info *rt)
return __ip6_ins_rt(rt, &info);
}
-static struct rt6_info *rt6_alloc_cow(struct rt6_info *ort, struct in6_addr *daddr,
- struct in6_addr *saddr)
+static struct rt6_info *rt6_alloc_cow(struct rt6_info *ort, const struct in6_addr *daddr,
+ const struct in6_addr *saddr)
{
struct rt6_info *rt;
@@ -739,7 +751,7 @@ static struct rt6_info *rt6_alloc_cow(struct rt6_info *ort, struct in6_addr *dad
return rt;
}
-static struct rt6_info *rt6_alloc_clone(struct rt6_info *ort, struct in6_addr *daddr)
+static struct rt6_info *rt6_alloc_clone(struct rt6_info *ort, const struct in6_addr *daddr)
{
struct rt6_info *rt = ip6_rt_copy(ort);
if (rt) {
@@ -830,7 +842,7 @@ static struct rt6_info *ip6_pol_route_input(struct net *net, struct fib6_table *
void ip6_route_input(struct sk_buff *skb)
{
- struct ipv6hdr *iph = ipv6_hdr(skb);
+ const struct ipv6hdr *iph = ipv6_hdr(skb);
struct net *net = dev_net(skb->dev);
int flags = RT6_LOOKUP_F_HAS_SADDR;
struct flowi6 fl6 = {
@@ -874,11 +886,13 @@ EXPORT_SYMBOL(ip6_route_output);
struct dst_entry *ip6_blackhole_route(struct net *net, struct dst_entry *dst_orig)
{
- struct rt6_info *rt = dst_alloc(&ip6_dst_blackhole_ops, 1);
- struct rt6_info *ort = (struct rt6_info *) dst_orig;
+ struct rt6_info *rt, *ort = (struct rt6_info *) dst_orig;
struct dst_entry *new = NULL;
+ rt = dst_alloc(&ip6_dst_blackhole_ops, ort->dst.dev, 1, 0, 0);
if (rt) {
+ memset(&rt->rt6i_table, 0, sizeof(*rt) - sizeof(struct dst_entry));
+
new = &rt->dst;
new->__use = 1;
@@ -886,9 +900,6 @@ struct dst_entry *ip6_blackhole_route(struct net *net, struct dst_entry *dst_ori
new->output = dst_discard;
dst_copy_metrics(new, &ort->dst);
- new->dev = ort->dst.dev;
- if (new->dev)
- dev_hold(new->dev);
rt->rt6i_idev = ort->rt6i_idev;
if (rt->rt6i_idev)
in6_dev_hold(rt->rt6i_idev);
@@ -1031,13 +1042,12 @@ struct dst_entry *icmp6_dst_alloc(struct net_device *dev,
if (unlikely(idev == NULL))
return NULL;
- rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops);
+ rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops, dev);
if (unlikely(rt == NULL)) {
in6_dev_put(idev);
goto out;
}
- dev_hold(dev);
if (neigh)
neigh_hold(neigh);
else {
@@ -1046,7 +1056,6 @@ struct dst_entry *icmp6_dst_alloc(struct net_device *dev,
neigh = NULL;
}
- rt->rt6i_dev = dev;
rt->rt6i_idev = idev;
rt->rt6i_nexthop = neigh;
atomic_set(&rt->dst.__refcnt, 1);
@@ -1205,7 +1214,7 @@ int ip6_route_add(struct fib6_config *cfg)
goto out;
}
- rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops);
+ rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops, NULL);
if (rt == NULL) {
err = -ENOMEM;
@@ -1272,7 +1281,7 @@ int ip6_route_add(struct fib6_config *cfg)
}
if (cfg->fc_flags & RTF_GATEWAY) {
- struct in6_addr *gw_addr;
+ const struct in6_addr *gw_addr;
int gwa_type;
gw_addr = &cfg->fc_gateway;
@@ -1325,6 +1334,16 @@ int ip6_route_add(struct fib6_config *cfg)
if (dev == NULL)
goto out;
+ if (!ipv6_addr_any(&cfg->fc_prefsrc)) {
+ if (!ipv6_chk_addr(net, &cfg->fc_prefsrc, dev, 0)) {
+ err = -EINVAL;
+ goto out;
+ }
+ ipv6_addr_copy(&rt->rt6i_prefsrc.addr, &cfg->fc_prefsrc);
+ rt->rt6i_prefsrc.plen = 128;
+ } else
+ rt->rt6i_prefsrc.plen = 0;
+
if (cfg->fc_flags & (RTF_GATEWAY | RTF_NONEXTHOP)) {
rt->rt6i_nexthop = __neigh_lookup_errno(&nd_tbl, &rt->rt6i_gateway, dev);
if (IS_ERR(rt->rt6i_nexthop)) {
@@ -1502,9 +1521,9 @@ out:
return rt;
};
-static struct rt6_info *ip6_route_redirect(struct in6_addr *dest,
- struct in6_addr *src,
- struct in6_addr *gateway,
+static struct rt6_info *ip6_route_redirect(const struct in6_addr *dest,
+ const struct in6_addr *src,
+ const struct in6_addr *gateway,
struct net_device *dev)
{
int flags = RT6_LOOKUP_F_HAS_SADDR;
@@ -1526,8 +1545,8 @@ static struct rt6_info *ip6_route_redirect(struct in6_addr *dest,
flags, __ip6_route_redirect);
}
-void rt6_redirect(struct in6_addr *dest, struct in6_addr *src,
- struct in6_addr *saddr,
+void rt6_redirect(const struct in6_addr *dest, const struct in6_addr *src,
+ const struct in6_addr *saddr,
struct neighbour *neigh, u8 *lladdr, int on_link)
{
struct rt6_info *rt, *nrt = NULL;
@@ -1601,7 +1620,7 @@ out:
* i.e. Path MTU discovery
*/
-static void rt6_do_pmtu_disc(struct in6_addr *daddr, struct in6_addr *saddr,
+static void rt6_do_pmtu_disc(const struct in6_addr *daddr, const struct in6_addr *saddr,
struct net *net, u32 pmtu, int ifindex)
{
struct rt6_info *rt, *nrt;
@@ -1686,7 +1705,7 @@ out:
dst_release(&rt->dst);
}
-void rt6_pmtu_discovery(struct in6_addr *daddr, struct in6_addr *saddr,
+void rt6_pmtu_discovery(const struct in6_addr *daddr, const struct in6_addr *saddr,
struct net_device *dev, u32 pmtu)
{
struct net *net = dev_net(dev);
@@ -1714,7 +1733,8 @@ void rt6_pmtu_discovery(struct in6_addr *daddr, struct in6_addr *saddr,
static struct rt6_info * ip6_rt_copy(struct rt6_info *ort)
{
struct net *net = dev_net(ort->rt6i_dev);
- struct rt6_info *rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops);
+ struct rt6_info *rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops,
+ ort->dst.dev);
if (rt) {
rt->dst.input = ort->dst.input;
@@ -1722,9 +1742,6 @@ static struct rt6_info * ip6_rt_copy(struct rt6_info *ort)
dst_copy_metrics(&rt->dst, &ort->dst);
rt->dst.error = ort->dst.error;
- rt->dst.dev = ort->dst.dev;
- if (rt->dst.dev)
- dev_hold(rt->dst.dev);
rt->rt6i_idev = ort->rt6i_idev;
if (rt->rt6i_idev)
in6_dev_hold(rt->rt6i_idev);
@@ -1739,6 +1756,7 @@ static struct rt6_info * ip6_rt_copy(struct rt6_info *ort)
#ifdef CONFIG_IPV6_SUBTREES
memcpy(&rt->rt6i_src, &ort->rt6i_src, sizeof(struct rt6key));
#endif
+ memcpy(&rt->rt6i_prefsrc, &ort->rt6i_prefsrc, sizeof(struct rt6key));
rt->rt6i_table = ort->rt6i_table;
}
return rt;
@@ -1746,8 +1764,8 @@ static struct rt6_info * ip6_rt_copy(struct rt6_info *ort)
#ifdef CONFIG_IPV6_ROUTE_INFO
static struct rt6_info *rt6_get_route_info(struct net *net,
- struct in6_addr *prefix, int prefixlen,
- struct in6_addr *gwaddr, int ifindex)
+ const struct in6_addr *prefix, int prefixlen,
+ const struct in6_addr *gwaddr, int ifindex)
{
struct fib6_node *fn;
struct rt6_info *rt = NULL;
@@ -1778,8 +1796,8 @@ out:
}
static struct rt6_info *rt6_add_route_info(struct net *net,
- struct in6_addr *prefix, int prefixlen,
- struct in6_addr *gwaddr, int ifindex,
+ const struct in6_addr *prefix, int prefixlen,
+ const struct in6_addr *gwaddr, int ifindex,
unsigned pref)
{
struct fib6_config cfg = {
@@ -1807,7 +1825,7 @@ static struct rt6_info *rt6_add_route_info(struct net *net,
}
#endif
-struct rt6_info *rt6_get_dflt_router(struct in6_addr *addr, struct net_device *dev)
+struct rt6_info *rt6_get_dflt_router(const struct in6_addr *addr, struct net_device *dev)
{
struct rt6_info *rt;
struct fib6_table *table;
@@ -1829,7 +1847,7 @@ struct rt6_info *rt6_get_dflt_router(struct in6_addr *addr, struct net_device *d
return rt;
}
-struct rt6_info *rt6_add_dflt_router(struct in6_addr *gwaddr,
+struct rt6_info *rt6_add_dflt_router(const struct in6_addr *gwaddr,
struct net_device *dev,
unsigned int pref)
{
@@ -1994,7 +2012,8 @@ struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
int anycast)
{
struct net *net = dev_net(idev->dev);
- struct rt6_info *rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops);
+ struct rt6_info *rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops,
+ net->loopback_dev);
struct neighbour *neigh;
if (rt == NULL) {
@@ -2004,15 +2023,12 @@ struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
return ERR_PTR(-ENOMEM);
}
- dev_hold(net->loopback_dev);
in6_dev_hold(idev);
rt->dst.flags = DST_HOST;
rt->dst.input = ip6_input;
rt->dst.output = ip6_output;
- rt->rt6i_dev = net->loopback_dev;
rt->rt6i_idev = idev;
- dst_metric_set(&rt->dst, RTAX_HOPLIMIT, -1);
rt->dst.obsolete = -1;
rt->rt6i_flags = RTF_UP | RTF_NONEXTHOP;
@@ -2037,6 +2053,55 @@ struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
return rt;
}
+int ip6_route_get_saddr(struct net *net,
+ struct rt6_info *rt,
+ const struct in6_addr *daddr,
+ unsigned int prefs,
+ struct in6_addr *saddr)
+{
+ struct inet6_dev *idev = ip6_dst_idev((struct dst_entry*)rt);
+ int err = 0;
+ if (rt->rt6i_prefsrc.plen)
+ ipv6_addr_copy(saddr, &rt->rt6i_prefsrc.addr);
+ else
+ err = ipv6_dev_get_saddr(net, idev ? idev->dev : NULL,
+ daddr, prefs, saddr);
+ return err;
+}
+
+/* remove deleted ip from prefsrc entries */
+struct arg_dev_net_ip {
+ struct net_device *dev;
+ struct net *net;
+ struct in6_addr *addr;
+};
+
+static int fib6_remove_prefsrc(struct rt6_info *rt, void *arg)
+{
+ struct net_device *dev = ((struct arg_dev_net_ip *)arg)->dev;
+ struct net *net = ((struct arg_dev_net_ip *)arg)->net;
+ struct in6_addr *addr = ((struct arg_dev_net_ip *)arg)->addr;
+
+ if (((void *)rt->rt6i_dev == dev || dev == NULL) &&
+ rt != net->ipv6.ip6_null_entry &&
+ ipv6_addr_equal(addr, &rt->rt6i_prefsrc.addr)) {
+ /* remove prefsrc entry */
+ rt->rt6i_prefsrc.plen = 0;
+ }
+ return 0;
+}
+
+void rt6_remove_prefsrc(struct inet6_ifaddr *ifp)
+{
+ struct net *net = dev_net(ifp->idev->dev);
+ struct arg_dev_net_ip adni = {
+ .dev = ifp->idev->dev,
+ .net = net,
+ .addr = &ifp->addr,
+ };
+ fib6_clean_all(net, fib6_remove_prefsrc, 0, &adni);
+}
+
struct arg_dev_net {
struct net_device *dev;
struct net *net;
@@ -2183,6 +2248,9 @@ static int rtm_to_fib6_config(struct sk_buff *skb, struct nlmsghdr *nlh,
nla_memcpy(&cfg->fc_src, tb[RTA_SRC], plen);
}
+ if (tb[RTA_PREFSRC])
+ nla_memcpy(&cfg->fc_prefsrc, tb[RTA_PREFSRC], 16);
+
if (tb[RTA_OIF])
cfg->fc_ifindex = nla_get_u32(tb[RTA_OIF]);
@@ -2325,13 +2393,17 @@ static int rt6_fill_node(struct net *net,
#endif
NLA_PUT_U32(skb, RTA_IIF, iif);
} else if (dst) {
- struct inet6_dev *idev = ip6_dst_idev(&rt->dst);
struct in6_addr saddr_buf;
- if (ipv6_dev_get_saddr(net, idev ? idev->dev : NULL,
- dst, 0, &saddr_buf) == 0)
+ if (ip6_route_get_saddr(net, rt, dst, 0, &saddr_buf) == 0)
NLA_PUT(skb, RTA_PREFSRC, 16, &saddr_buf);
}
+ if (rt->rt6i_prefsrc.plen) {
+ struct in6_addr saddr_buf;
+ ipv6_addr_copy(&saddr_buf, &rt->rt6i_prefsrc.addr);
+ NLA_PUT(skb, RTA_PREFSRC, 16, &saddr_buf);
+ }
+
if (rtnetlink_put_metrics(skb, dst_metrics_ptr(&rt->dst)) < 0)
goto nla_put_failure;
generated by cgit v1.2.3-70-g09d2 (git 2.51.2) at 2025-11-04 11:27:17 +0000