ipv4: implement support for NOPREFIXROUTE ifa flag for ipv4 address

[deliverable/linux.git] / net / ipv4 / fib_frontend.c

diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index d7c2bb0c4f6536c1b1d3ee57dc97e1047793f3ba..e786873c89f207adeccaffe3ad7046590da6cc38 100644 (file)
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -867,9 +867,10 @@ void fib_add_ifaddr(struct in_ifaddr *ifa)
 
        if (!ipv4_is_zeronet(prefix) && !(ifa->ifa_flags & IFA_F_SECONDARY) &&
            (prefix != addr || ifa->ifa_prefixlen < 32)) {
-               fib_magic(RTM_NEWROUTE,
-                         dev->flags & IFF_LOOPBACK ? RTN_LOCAL : RTN_UNICAST,
-                         prefix, ifa->ifa_prefixlen, prim);
+               if (!(ifa->ifa_flags & IFA_F_NOPREFIXROUTE))
+                       fib_magic(RTM_NEWROUTE,
+                                 dev->flags & IFF_LOOPBACK ? RTN_LOCAL : RTN_UNICAST,
+                                 prefix, ifa->ifa_prefixlen, prim);
 
                /* Add network specific broadcasts, when it takes a sense */
                if (ifa->ifa_prefixlen < 31) {
@@ -914,9 +915,10 @@ void fib_del_ifaddr(struct in_ifaddr *ifa, struct in_ifaddr *iprim)
                }
        } else if (!ipv4_is_zeronet(any) &&
                   (any != ifa->ifa_local || ifa->ifa_prefixlen < 32)) {
-               fib_magic(RTM_DELROUTE,
-                         dev->flags & IFF_LOOPBACK ? RTN_LOCAL : RTN_UNICAST,
-                         any, ifa->ifa_prefixlen, prim);
+               if (!(ifa->ifa_flags & IFA_F_NOPREFIXROUTE))
+                       fib_magic(RTM_DELROUTE,
+                                 dev->flags & IFF_LOOPBACK ? RTN_LOCAL : RTN_UNICAST,
+                                 any, ifa->ifa_prefixlen, prim);
                subnet = 1;
        }