From: Ido Schimmel <idosch@mellanox.com>
Date: Wed, 2 May 2018 10:17:35 +0300
Subject: mlxsw: spectrum_router: Return an error for routes added after abort
Patch-mainline: v4.18-rc1
Git-commit: 50d10711cf1b0bf82f274b0901f54e7ff030b740
References: bsc#1112374

We currently do not perform accounting in the driver and thus can't
reject routes before resources are exceeded.

However, in order to make users aware of the fact that routes are no
longer offloaded we can return an error for routes configured after the
abort mechanism was triggered.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Acked-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c |    7 +++++++
 1 file changed, 7 insertions(+)

--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
@@ -5924,6 +5924,13 @@ static int mlxsw_sp_router_fib_event(str
 						     router->mlxsw_sp);
 		if (!err || info->extack)
 			return notifier_from_errno(err);
+		break;
+	case FIB_EVENT_ENTRY_ADD:
+		if (router->aborted) {
+			NL_SET_ERR_MSG_MOD(info->extack, "FIB offload was aborted. Not configuring route");
+			return notifier_from_errno(-EINVAL);
+		}
+		break;
 	}
 
 	fib_work = kzalloc(sizeof(*fib_work), GFP_ATOMIC);