summaryrefslogtreecommitdiffstats
path: root/net/ipv4/fib_semantics.c
diff options
context:
space:
mode:
authorDavid Ahern <dsahern@gmail.com>2019-04-05 16:30:30 -0700
committerDavid S. Miller <davem@davemloft.net>2019-04-08 15:22:40 -0700
commita4ea5d43c807be28545625c1e0641905022fa0d1 (patch)
tree81dece465c821345b0b176e555bdcd3389a5c8fe /net/ipv4/fib_semantics.c
parent0f5f7d7bf6e6bda4dffe7b42812a16ada6ea9816 (diff)
downloadlinux-a4ea5d43c807be28545625c1e0641905022fa0d1.tar.bz2
ipv4: Add support to fib_config for IPv6 gateway
Add support for an IPv6 gateway to fib_config. Since a gateway is either IPv4 or IPv6, make it a union with fc_gw4 where fc_gw_family decides which address is in use. Update current checks on family and gw4 to handle ipv6 as well. Signed-off-by: David Ahern <dsahern@gmail.com> Reviewed-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/fib_semantics.c')
-rw-r--r--net/ipv4/fib_semantics.c29
1 files changed, 23 insertions, 6 deletions
diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index d3e26e55f2e1..680b5a9a911a 100644
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -276,7 +276,7 @@ static inline int nh_comp(const struct fib_info *fi, const struct fib_info *ofi)
for_nexthops(fi) {
if (nh->fib_nh_oif != onh->fib_nh_oif ||
- nh->fib_nh_gw4 != onh->fib_nh_gw4 ||
+ nh->fib_nh_gw_family != onh->fib_nh_gw_family ||
nh->fib_nh_scope != onh->fib_nh_scope ||
#ifdef CONFIG_IP_ROUTE_MULTIPATH
nh->fib_nh_weight != onh->fib_nh_weight ||
@@ -287,6 +287,15 @@ static inline int nh_comp(const struct fib_info *fi, const struct fib_info *ofi)
lwtunnel_cmp_encap(nh->fib_nh_lws, onh->fib_nh_lws) ||
((nh->fib_nh_flags ^ onh->fib_nh_flags) & ~RTNH_COMPARE_MASK))
return -1;
+
+ if (nh->fib_nh_gw_family == AF_INET &&
+ nh->fib_nh_gw4 != onh->fib_nh_gw4)
+ return -1;
+
+ if (nh->fib_nh_gw_family == AF_INET6 &&
+ ipv6_addr_cmp(&nh->fib_nh_gw6, &onh->fib_nh_gw6))
+ return -1;
+
onh++;
} endfor_nexthops(fi);
return 0;
@@ -511,10 +520,12 @@ int fib_nh_init(struct net *net, struct fib_nh *nh,
goto init_failure;
nh->fib_nh_oif = cfg->fc_oif;
- if (cfg->fc_gw_family == AF_INET) {
+ nh->fib_nh_gw_family = cfg->fc_gw_family;
+ if (cfg->fc_gw_family == AF_INET)
nh->fib_nh_gw4 = cfg->fc_gw4;
- nh->fib_nh_gw_family = AF_INET;
- }
+ else if (cfg->fc_gw_family == AF_INET6)
+ nh->fib_nh_gw6 = cfg->fc_gw6;
+
nh->fib_nh_flags = cfg->fc_flags;
#ifdef CONFIG_IP_ROUTE_CLASSID
@@ -621,9 +632,11 @@ static int fib_get_nhs(struct fib_info *fi, struct rtnexthop *rtnh,
if (cfg->fc_gw_family) {
if (cfg->fc_gw_family != fi->fib_nh->fib_nh_gw_family ||
(cfg->fc_gw_family == AF_INET &&
- fi->fib_nh->fib_nh_gw4 != cfg->fc_gw4)) {
+ fi->fib_nh->fib_nh_gw4 != cfg->fc_gw4) ||
+ (cfg->fc_gw_family == AF_INET6 &&
+ ipv6_addr_cmp(&fi->fib_nh->fib_nh_gw6, &cfg->fc_gw6))) {
NL_SET_ERR_MSG(extack,
- "Nexthop gateway does not match RTA_GATEWAY");
+ "Nexthop gateway does not match RTA_GATEWAY or RTA_VIA");
goto errout;
}
}
@@ -745,6 +758,10 @@ int fib_nh_match(struct fib_config *cfg, struct fib_info *fi,
cfg->fc_gw4 != fi->fib_nh->fib_nh_gw4)
return 1;
+ if (cfg->fc_gw_family == AF_INET6 &&
+ ipv6_addr_cmp(&cfg->fc_gw6, &fi->fib_nh->fib_nh_gw6))
+ return 1;
+
return 0;
}