ipv6: allow routes to be configured with expire values

Add the support for adding expire value to routes,  requested by
Tom Gundersen <teg@jklm.no> for systemd-networkd, and NetworkManager
wants it too.

implement it by adding the new RTNETLINK attribute RTA_EXPIRES.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/uapi/linux/rtnetlink.h b/include/uapi/linux/rtnetlink.h
index 123a5af..ca764b5 100644 (file)
--- a/include/uapi/linux/rtnetlink.h
+++ b/include/uapi/linux/rtnetlink.h
@@ -311,6 +311,7 @@ enum rtattr_type_t {
        RTA_PREF,
        RTA_ENCAP_TYPE,
        RTA_ENCAP,
+       RTA_EXPIRES,
        __RTA_MAX
 };
 

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index c83b6a5..3c8834b 100644 (file)
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -2709,6 +2709,7 @@ static const struct nla_policy rtm_ipv6_policy[RTA_MAX+1] = {
        [RTA_PREF]              = { .type = NLA_U8 },
        [RTA_ENCAP_TYPE]        = { .type = NLA_U16 },
        [RTA_ENCAP]             = { .type = NLA_NESTED },
+       [RTA_EXPIRES]           = { .type = NLA_U32 },
 };
 
 static int rtm_to_fib6_config(struct sk_buff *skb, struct nlmsghdr *nlh,
@@ -2809,6 +2810,15 @@ static int rtm_to_fib6_config(struct sk_buff *skb, struct nlmsghdr *nlh,
        if (tb[RTA_ENCAP_TYPE])
                cfg->fc_encap_type = nla_get_u16(tb[RTA_ENCAP_TYPE]);
 
+       if (tb[RTA_EXPIRES]) {
+               unsigned long timeout = addrconf_timeout_fixup(nla_get_u32(tb[RTA_EXPIRES]), HZ);
+
+               if (addrconf_finite_timeout(timeout)) {
+                       cfg->fc_expires = jiffies_to_clock_t(timeout * HZ);
+                       cfg->fc_flags |= RTF_EXPIRES;
+               }
+       }
+
        err = 0;
 errout:
        return err;