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-rw-r--r--net/switchdev/switchdev.c28
1 files changed, 26 insertions, 2 deletions
diff --git a/net/switchdev/switchdev.c b/net/switchdev/switchdev.c
index 99907d829419..f4fd575aa2a3 100644
--- a/net/switchdev/switchdev.c
+++ b/net/switchdev/switchdev.c
@@ -305,8 +305,12 @@ int netdev_switch_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi,
const struct net_device_ops *ops;
int err = 0;
- /* Don't offload route if using custom ip rules */
- if (fi->fib_net->ipv4.fib_has_custom_rules)
+ /* Don't offload route if using custom ip rules or if
+ * IPv4 FIB offloading has been disabled completely.
+ */
+
+ if (fi->fib_net->ipv4.fib_has_custom_rules |
+ fi->fib_net->ipv4.fib_offload_disabled)
return 0;
dev = netdev_switch_get_dev_by_nhs(fi);
@@ -362,3 +366,23 @@ int netdev_switch_fib_ipv4_del(u32 dst, int dst_len, struct fib_info *fi,
return err;
}
EXPORT_SYMBOL(netdev_switch_fib_ipv4_del);
+
+/**
+ * netdev_switch_fib_ipv4_abort - Abort an IPv4 FIB operation
+ *
+ * @fi: route FIB info structure
+ */
+void netdev_switch_fib_ipv4_abort(struct fib_info *fi)
+{
+ /* There was a problem installing this route to the offload
+ * device. For now, until we come up with more refined
+ * policy handling, abruptly end IPv4 fib offloading for
+ * for entire net by flushing offload device(s) of all
+ * IPv4 routes, and mark IPv4 fib offloading broken from
+ * this point forward.
+ */
+
+ fib_flush_external(fi->fib_net);
+ fi->fib_net->ipv4.fib_offload_disabled = true;
+}
+EXPORT_SYMBOL(netdev_switch_fib_ipv4_abort);