ipv4: Prepare fib_config for IPv6 gateway
Similar to rtable, fib_config needs to allow the gateway to be either an
IPv4 or an IPv6 address. To that end, rename fc_gw to fc_gw4 to mean an
IPv4 address and add fc_gw_family. Checks on 'is a gateway set' are changed
to see if fc_gw_family is set. In the process prepare the code for a
fc_gw_family == AF_INET6.
Signed-off-by: David Ahern <dsahern@gmail.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index e11f78c..d3e26e5 100644
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -511,8 +511,8 @@ 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) {
- nh->fib_nh_gw4 = cfg->fc_gw;
+ if (cfg->fc_gw_family == AF_INET) {
+ nh->fib_nh_gw4 = cfg->fc_gw4;
nh->fib_nh_gw_family = AF_INET;
}
nh->fib_nh_flags = cfg->fc_flags;
@@ -589,8 +589,10 @@ static int fib_get_nhs(struct fib_info *fi, struct rtnexthop *rtnh,
struct nlattr *nla, *attrs = rtnh_attrs(rtnh);
nla = nla_find(attrs, attrlen, RTA_GATEWAY);
- if (nla)
- fib_cfg.fc_gw = nla_get_in_addr(nla);
+ if (nla) {
+ fib_cfg.fc_gw_family = AF_INET;
+ fib_cfg.fc_gw4 = nla_get_in_addr(nla);
+ }
nla = nla_find(attrs, attrlen, RTA_FLOW);
if (nla)
@@ -616,10 +618,14 @@ static int fib_get_nhs(struct fib_info *fi, struct rtnexthop *rtnh,
"Nexthop device index does not match RTA_OIF");
goto errout;
}
- if (cfg->fc_gw && fi->fib_nh->fib_nh_gw4 != cfg->fc_gw) {
- NL_SET_ERR_MSG(extack,
- "Nexthop gateway does not match RTA_GATEWAY");
- goto errout;
+ 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)) {
+ NL_SET_ERR_MSG(extack,
+ "Nexthop gateway does not match RTA_GATEWAY");
+ goto errout;
+ }
}
#ifdef CONFIG_IP_ROUTE_CLASSID
if (cfg->fc_flow && fi->fib_nh->nh_tclassid != cfg->fc_flow) {
@@ -719,7 +725,7 @@ int fib_nh_match(struct fib_config *cfg, struct fib_info *fi,
if (cfg->fc_priority && cfg->fc_priority != fi->fib_priority)
return 1;
- if (cfg->fc_oif || cfg->fc_gw) {
+ if (cfg->fc_oif || cfg->fc_gw_family) {
if (cfg->fc_encap) {
if (fib_encap_match(cfg->fc_encap_type, cfg->fc_encap,
fi->fib_nh, cfg, extack))
@@ -730,10 +736,16 @@ int fib_nh_match(struct fib_config *cfg, struct fib_info *fi,
cfg->fc_flow != fi->fib_nh->nh_tclassid)
return 1;
#endif
- if ((!cfg->fc_oif || cfg->fc_oif == fi->fib_nh->fib_nh_oif) &&
- (!cfg->fc_gw || cfg->fc_gw == fi->fib_nh->fib_nh_gw4))
- return 0;
- return 1;
+ if ((cfg->fc_oif && cfg->fc_oif != fi->fib_nh->fib_nh_oif) ||
+ (cfg->fc_gw_family &&
+ cfg->fc_gw_family != fi->fib_nh->fib_nh_gw_family))
+ return 1;
+
+ if (cfg->fc_gw_family == AF_INET &&
+ cfg->fc_gw4 != fi->fib_nh->fib_nh_gw4)
+ return 1;
+
+ return 0;
}
#ifdef CONFIG_IP_ROUTE_MULTIPATH
@@ -1204,7 +1216,7 @@ struct fib_info *fib_create_info(struct fib_config *cfg,
goto failure;
if (fib_props[cfg->fc_type].error) {
- if (cfg->fc_gw || cfg->fc_oif || cfg->fc_mp) {
+ if (cfg->fc_gw_family || cfg->fc_oif || cfg->fc_mp) {
NL_SET_ERR_MSG(extack,
"Gateway, device and multipath can not be specified for this route type");
goto err_inval;