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authorDavid Ahern <dsahern@gmail.com>2019-04-05 16:30:32 -0700
committerDavid S. Miller <davem@davemloft.net>2019-04-08 15:22:41 -0700
commit717a8f5b2923c44da9157e145c294c4343a5f6de (patch)
tree5bafa5a9c87bbc9644abd70ce53c055bebdf79a7 /net
parent448d7248191706cbbd7761e3bc72c2985c4d38a7 (diff)
ipv4: Add fib_check_nh_v6_gw
Add helper to use fib6_nh_init to validate a nexthop spec with an IPv6 gateway. 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')
-rw-r--r--net/ipv4/fib_semantics.c27
1 files changed, 27 insertions, 0 deletions
diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index 32ce6e6202d2..dd95725c318e 100644
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -41,6 +41,7 @@
#include <net/tcp.h>
#include <net/sock.h>
#include <net/ip_fib.h>
+#include <net/ip6_fib.h>
#include <net/netlink.h>
#include <net/nexthop.h>
#include <net/lwtunnel.h>
@@ -841,6 +842,30 @@ bool fib_metrics_match(struct fib_config *cfg, struct fib_info *fi)
return true;
}
+static int fib_check_nh_v6_gw(struct net *net, struct fib_nh *nh,
+ u32 table, struct netlink_ext_ack *extack)
+{
+ struct fib6_config cfg = {
+ .fc_table = table,
+ .fc_flags = nh->fib_nh_flags | RTF_GATEWAY,
+ .fc_ifindex = nh->fib_nh_oif,
+ .fc_gateway = nh->fib_nh_gw6,
+ };
+ struct fib6_nh fib6_nh = {};
+ int err;
+
+ err = ipv6_stub->fib6_nh_init(net, &fib6_nh, &cfg, GFP_KERNEL, extack);
+ if (!err) {
+ nh->fib_nh_dev = fib6_nh.fib_nh_dev;
+ dev_hold(nh->fib_nh_dev);
+ nh->fib_nh_oif = nh->fib_nh_dev->ifindex;
+ nh->fib_nh_scope = RT_SCOPE_LINK;
+
+ ipv6_stub->fib6_nh_release(&fib6_nh);
+ }
+
+ return err;
+}
/*
* Picture
@@ -1023,6 +1048,8 @@ static int fib_check_nh(struct fib_config *cfg, struct fib_nh *nh,
if (nh->fib_nh_gw_family == AF_INET)
err = fib_check_nh_v4_gw(net, nh, table, cfg->fc_scope, extack);
+ else if (nh->fib_nh_gw_family == AF_INET6)
+ err = fib_check_nh_v6_gw(net, nh, table, extack);
else
err = fib_check_nh_nongw(net, nh, extack);