From: David Ahern <dsah...@gmail.com>
Until support is added to the offload drivers, they need to be able to
reject routes with an IPv6 gateway. To that end add a flag to fib_info
that indicates if any fib_nh has a v6 gateway. The flag allows the drivers
to efficiently know the use of a v6 gateway without walking all fib_nh
tied to a fib_info each time a route is added.
Update mlxsw and rocker to reject the routes with extack message as to why.
Signed-off-by: David Ahern <dsah...@gmail.com>
---
drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c | 8 ++++++++
drivers/net/ethernet/rocker/rocker_main.c | 9 +++++++++
include/net/ip_fib.h | 1 +
net/ipv4/fib_semantics.c | 2 ++
4 files changed, 20 insertions(+)
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
index 772aa78cab51..5f05723011b4 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
@@ -6092,6 +6092,14 @@ static int mlxsw_sp_router_fib_event(struct
notifier_block *nb,
NL_SET_ERR_MSG_MOD(info->extack, "FIB offload was
aborted. Not configuring route");
return notifier_from_errno(-EINVAL);
}
+ if (info->family == AF_INET) {
+ struct fib_entry_notifier_info *fen_info = ptr;
+
+ if (fen_info->fi->fib_nh_is_v6) {
+ NL_SET_ERR_MSG_MOD(info->extack, "IPv6 gateway
with IPv4 route is not supported");
+ return notifier_from_errno(-EINVAL);
+ }
+ }
break;
}
diff --git a/drivers/net/ethernet/rocker/rocker_main.c
b/drivers/net/ethernet/rocker/rocker_main.c
index a71c900ca04f..7ae6c124bfe9 100644
--- a/drivers/net/ethernet/rocker/rocker_main.c
+++ b/drivers/net/ethernet/rocker/rocker_main.c
@@ -2207,6 +2207,15 @@ static int rocker_router_fib_event(struct notifier_block
*nb,
switch (event) {
case FIB_EVENT_ENTRY_ADD: /* fall through */
case FIB_EVENT_ENTRY_DEL:
+ if (info->family == AF_INET) {
+ struct fib_entry_notifier_info *fen_info = ptr;
+
+ if (fen_info->fi->fib_nh_is_v6) {
+ NL_SET_ERR_MSG_MOD(info->extack, "IPv6 gateway
with IPv4 route is not supported");
+ return notifier_from_errno(-EINVAL);
+ }
+ }
+
memcpy(&fib_work->fen_info, ptr, sizeof(fib_work->fen_info));
/* Take referece on fib_info to prevent it from being
* freed while work is queued. Release it afterwards.
diff --git a/include/net/ip_fib.h b/include/net/ip_fib.h
index f1c452f618a9..337106469ec5 100644
--- a/include/net/ip_fib.h
+++ b/include/net/ip_fib.h
@@ -147,6 +147,7 @@ struct fib_info {
#define fib_rtt fib_metrics->metrics[RTAX_RTT-1]
#define fib_advmss fib_metrics->metrics[RTAX_ADVMSS-1]
int fib_nhs;
+ bool fib_nh_is_v6;
struct rcu_head rcu;
struct fib_nh fib_nh[0];
#define fib_dev fib_nh[0].fib_nh_dev
diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index c1ea138335a2..4a968e24507b 100644
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -1349,6 +1349,8 @@ struct fib_info *fib_create_info(struct fib_config *cfg,
change_nexthops(fi) {
fib_info_update_nh_saddr(net, nexthop_nh);
+ if (nexthop_nh->fib_nh_gw_family == AF_INET6)
+ fi->fib_nh_is_v6 = true;
} endfor_nexthops(fi)
fib_rebalance(fi);
--
2.11.0
