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-rw-r--r--include/net/addrconf.h1
-rw-r--r--include/net/if_inet6.h1
-rw-r--r--net/ipv6/addrconf.c93
3 files changed, 77 insertions, 18 deletions
diff --git a/include/net/addrconf.h b/include/net/addrconf.h
index f766af2cd1a4..5f43f7a70fe6 100644
--- a/include/net/addrconf.h
+++ b/include/net/addrconf.h
@@ -65,6 +65,7 @@ struct ifa6_config {
const struct in6_addr *peer_pfx;
+ u32 rt_priority;
u32 ifa_flags;
u32 preferred_lft;
u32 valid_lft;
diff --git a/include/net/if_inet6.h b/include/net/if_inet6.h
index db389253dc2a..d7578cf49c3a 100644
--- a/include/net/if_inet6.h
+++ b/include/net/if_inet6.h
@@ -42,6 +42,7 @@ enum {
struct inet6_ifaddr {
struct in6_addr addr;
__u32 prefix_len;
+ __u32 rt_priority;
/* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */
__u32 valid_lft;
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 1b1e63a4520b..f09afc232da4 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -1056,6 +1056,7 @@ ipv6_add_addr(struct inet6_dev *idev, struct ifa6_config *cfg,
INIT_HLIST_NODE(&ifa->addr_lst);
ifa->scope = cfg->scope;
ifa->prefix_len = cfg->plen;
+ ifa->rt_priority = cfg->rt_priority;
ifa->flags = cfg->ifa_flags;
/* No need to add the TENTATIVE flag for addresses with NODAD */
if (!(cfg->ifa_flags & IFA_F_NODAD))
@@ -1356,6 +1357,7 @@ retry:
cfg.pfx = &addr;
cfg.scope = ipv6_addr_scope(cfg.pfx);
+ cfg.rt_priority = 0;
ift = ipv6_add_addr(idev, &cfg, block, NULL);
if (IS_ERR(ift)) {
@@ -2314,12 +2316,13 @@ static void ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpad
*/
static void
-addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
- unsigned long expires, u32 flags, gfp_t gfp_flags)
+addrconf_prefix_route(struct in6_addr *pfx, int plen, u32 metric,
+ struct net_device *dev, unsigned long expires,
+ u32 flags, gfp_t gfp_flags)
{
struct fib6_config cfg = {
.fc_table = l3mdev_fib_table(dev) ? : RT6_TABLE_PREFIX,
- .fc_metric = IP6_RT_PRIO_ADDRCONF,
+ .fc_metric = metric ? : IP6_RT_PRIO_ADDRCONF,
.fc_ifindex = dev->ifindex,
.fc_expires = expires,
.fc_dst_len = plen,
@@ -2683,7 +2686,8 @@ void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao)
expires = jiffies_to_clock_t(rt_expires);
}
addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
- dev, expires, flags, GFP_ATOMIC);
+ 0, dev, expires, flags,
+ GFP_ATOMIC);
}
fib6_info_release(rt);
}
@@ -2891,8 +2895,9 @@ static int inet6_addr_add(struct net *net, int ifindex,
ifp = ipv6_add_addr(idev, cfg, true, extack);
if (!IS_ERR(ifp)) {
if (!(cfg->ifa_flags & IFA_F_NOPREFIXROUTE)) {
- addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev,
- expires, flags, GFP_KERNEL);
+ addrconf_prefix_route(&ifp->addr, ifp->prefix_len,
+ ifp->rt_priority, dev, expires,
+ flags, GFP_KERNEL);
}
/* Send a netlink notification if DAD is enabled and
@@ -3056,7 +3061,7 @@ static void sit_add_v4_addrs(struct inet6_dev *idev)
if (addr.s6_addr32[3]) {
add_addr(idev, &addr, plen, scope);
- addrconf_prefix_route(&addr, plen, idev->dev, 0, pflags,
+ addrconf_prefix_route(&addr, plen, 0, idev->dev, 0, pflags,
GFP_ATOMIC);
return;
}
@@ -3081,8 +3086,8 @@ static void sit_add_v4_addrs(struct inet6_dev *idev)
}
add_addr(idev, &addr, plen, flag);
- addrconf_prefix_route(&addr, plen, idev->dev, 0,
- pflags, GFP_ATOMIC);
+ addrconf_prefix_route(&addr, plen, 0, idev->dev,
+ 0, pflags, GFP_ATOMIC);
}
}
}
@@ -3128,7 +3133,7 @@ void addrconf_add_linklocal(struct inet6_dev *idev,
ifp = ipv6_add_addr(idev, &cfg, true, NULL);
if (!IS_ERR(ifp)) {
- addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev,
+ addrconf_prefix_route(&ifp->addr, ifp->prefix_len, 0, idev->dev,
0, 0, GFP_ATOMIC);
addrconf_dad_start(ifp);
in6_ifa_put(ifp);
@@ -3244,7 +3249,7 @@ static void addrconf_addr_gen(struct inet6_dev *idev, bool prefix_route)
addrconf_add_linklocal(idev, &addr,
IFA_F_STABLE_PRIVACY);
else if (prefix_route)
- addrconf_prefix_route(&addr, 64, idev->dev,
+ addrconf_prefix_route(&addr, 64, 0, idev->dev,
0, 0, GFP_KERNEL);
break;
case IN6_ADDR_GEN_MODE_EUI64:
@@ -3255,7 +3260,7 @@ static void addrconf_addr_gen(struct inet6_dev *idev, bool prefix_route)
if (ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) == 0)
addrconf_add_linklocal(idev, &addr, 0);
else if (prefix_route)
- addrconf_prefix_route(&addr, 64, idev->dev,
+ addrconf_prefix_route(&addr, 64, 0, idev->dev,
0, 0, GFP_KERNEL);
break;
case IN6_ADDR_GEN_MODE_NONE:
@@ -3375,7 +3380,8 @@ static int fixup_permanent_addr(struct net *net,
if (!(ifp->flags & IFA_F_NOPREFIXROUTE)) {
addrconf_prefix_route(&ifp->addr, ifp->prefix_len,
- idev->dev, 0, 0, GFP_ATOMIC);
+ ifp->rt_priority, idev->dev, 0, 0,
+ GFP_ATOMIC);
}
if (ifp->state == INET6_IFADDR_STATE_PREDAD)
@@ -4495,6 +4501,7 @@ static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = {
[IFA_LOCAL] = { .len = sizeof(struct in6_addr) },
[IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) },
[IFA_FLAGS] = { .len = sizeof(u32) },
+ [IFA_RT_PRIORITY] = { .len = sizeof(u32) },
};
static int
@@ -4527,6 +4534,37 @@ inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh,
ifm->ifa_prefixlen);
}
+static int modify_prefix_route(struct inet6_ifaddr *ifp,
+ unsigned long expires, u32 flags)
+{
+ struct fib6_info *f6i;
+
+ f6i = addrconf_get_prefix_route(&ifp->addr,
+ ifp->prefix_len,
+ ifp->idev->dev,
+ 0, RTF_GATEWAY | RTF_DEFAULT);
+ if (!f6i)
+ return -ENOENT;
+
+ if (f6i->fib6_metric != ifp->rt_priority) {
+ /* add new one */
+ addrconf_prefix_route(&ifp->addr, ifp->prefix_len,
+ ifp->rt_priority, ifp->idev->dev,
+ expires, flags, GFP_KERNEL);
+ /* delete old one */
+ ip6_del_rt(dev_net(ifp->idev->dev), f6i);
+ } else {
+ if (!expires)
+ fib6_clean_expires(f6i);
+ else
+ fib6_set_expires(f6i, expires);
+
+ fib6_info_release(f6i);
+ }
+
+ return 0;
+}
+
static int inet6_addr_modify(struct inet6_ifaddr *ifp, struct ifa6_config *cfg)
{
u32 flags;
@@ -4577,14 +4615,25 @@ static int inet6_addr_modify(struct inet6_ifaddr *ifp, struct ifa6_config *cfg)
ifp->valid_lft = cfg->valid_lft;
ifp->prefered_lft = cfg->preferred_lft;
+ if (cfg->rt_priority && cfg->rt_priority != ifp->rt_priority)
+ ifp->rt_priority = cfg->rt_priority;
+
spin_unlock_bh(&ifp->lock);
if (!(ifp->flags&IFA_F_TENTATIVE))
ipv6_ifa_notify(0, ifp);
if (!(cfg->ifa_flags & IFA_F_NOPREFIXROUTE)) {
- addrconf_prefix_route(&ifp->addr, ifp->prefix_len,
- ifp->idev->dev, expires, flags,
- GFP_KERNEL);
+ int rc = -ENOENT;
+
+ if (had_prefixroute)
+ rc = modify_prefix_route(ifp, expires, flags);
+
+ /* prefix route could have been deleted; if so restore it */
+ if (rc == -ENOENT) {
+ addrconf_prefix_route(&ifp->addr, ifp->prefix_len,
+ ifp->rt_priority, ifp->idev->dev,
+ expires, flags, GFP_KERNEL);
+ }
} else if (had_prefixroute) {
enum cleanup_prefix_rt_t action;
unsigned long rt_expires;
@@ -4643,6 +4692,9 @@ inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh,
cfg.peer_pfx = peer_pfx;
cfg.plen = ifm->ifa_prefixlen;
+ if (tb[IFA_RT_PRIORITY])
+ cfg.rt_priority = nla_get_u32(tb[IFA_RT_PRIORITY]);
+
cfg.valid_lft = INFINITY_LIFE_TIME;
cfg.preferred_lft = INFINITY_LIFE_TIME;
@@ -4745,7 +4797,8 @@ static inline int inet6_ifaddr_msgsize(void)
+ nla_total_size(16) /* IFA_LOCAL */
+ nla_total_size(16) /* IFA_ADDRESS */
+ nla_total_size(sizeof(struct ifa_cacheinfo))
- + nla_total_size(4) /* IFA_FLAGS */;
+ + nla_total_size(4) /* IFA_FLAGS */
+ + nla_total_size(4) /* IFA_RT_PRIORITY */;
}
static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
@@ -4791,6 +4844,10 @@ static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
if (nla_put_in6_addr(skb, IFA_ADDRESS, &ifa->addr) < 0)
goto error;
+ if (ifa->rt_priority &&
+ nla_put_u32(skb, IFA_RT_PRIORITY, ifa->rt_priority))
+ goto error;
+
if (put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0)
goto error;
@@ -5635,7 +5692,7 @@ static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
if (ifp->idev->cnf.forwarding)
addrconf_join_anycast(ifp);
if (!ipv6_addr_any(&ifp->peer_addr))
- addrconf_prefix_route(&ifp->peer_addr, 128,
+ addrconf_prefix_route(&ifp->peer_addr, 128, 0,
ifp->idev->dev, 0, 0,
GFP_ATOMIC);
break;
generated by cgit v1.2.3 (git 2.39.1) at 2024-08-02 21:03:26 +0000