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2023-12-08 01573e231f18eb2d99162747186f59511f56b64d

 kernel/include/net/l3mdev.h
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@@ -1,18 +1,24 @@
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+/* SPDX-License-Identifier: GPL-2.0-or-later */
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 /*
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  * include/net/l3mdev.h - L3 master device API
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  * Copyright (c) 2015 Cumulus Networks
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  * Copyright (c) 2015 David Ahern <dsa@cumulusnetworks.com>
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License as published by
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- * the Free Software Foundation; either version 2 of the License, or
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- * (at your option) any later version.
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  */
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 #ifndef _NET_L3MDEV_H_
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 #define _NET_L3MDEV_H_
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 #include <net/dst.h>
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 #include <net/fib_rules.h>
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+
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+enum l3mdev_type {
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+	L3MDEV_TYPE_UNSPEC,
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+	L3MDEV_TYPE_VRF,
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+	__L3MDEV_TYPE_MAX
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+};
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+
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+#define L3MDEV_TYPE_MAX (__L3MDEV_TYPE_MAX - 1)
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+
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+typedef int (*lookup_by_table_id_t)(struct net *net, u32 table_d);
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 /**
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  * struct l3mdev_ops - l3mdev operations
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@@ -40,6 +46,15 @@
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 };
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 #ifdef CONFIG_NET_L3_MASTER_DEV
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+
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+int l3mdev_table_lookup_register(enum l3mdev_type l3type,
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+				 lookup_by_table_id_t fn);
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+
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+void l3mdev_table_lookup_unregister(enum l3mdev_type l3type,
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+				    lookup_by_table_id_t fn);
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+
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+int l3mdev_ifindex_lookup_by_table_id(enum l3mdev_type l3type, struct net *net,
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+				      u32 table_id);
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 int l3mdev_fib_rule_match(struct net *net, struct flowi *fl,
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 			  struct fib_lookup_arg *arg);
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@@ -99,6 +114,17 @@
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 		master = NULL;
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 	return master;
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+}
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+
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+int l3mdev_master_upper_ifindex_by_index_rcu(struct net *net, int ifindex);
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+static inline
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+int l3mdev_master_upper_ifindex_by_index(struct net *net, int ifindex)
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+{
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+	rcu_read_lock();
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+	ifindex = l3mdev_master_upper_ifindex_by_index_rcu(net, ifindex);
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+	rcu_read_unlock();
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+
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+	return ifindex;
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 }
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 u32 l3mdev_fib_table_rcu(const struct net_device *dev);
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@@ -209,6 +235,17 @@
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 }
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 static inline
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+int l3mdev_master_upper_ifindex_by_index_rcu(struct net *net, int ifindex)
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+{
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+	return 0;
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+}
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+static inline
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+int l3mdev_master_upper_ifindex_by_index(struct net *net, int ifindex)
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+{
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+	return 0;
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+}
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+
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+static inline
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 struct net_device *l3mdev_master_dev_rcu(const struct net_device *dev)
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 {
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 	return NULL;
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@@ -263,6 +300,26 @@
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 }
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 static inline
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+int l3mdev_table_lookup_register(enum l3mdev_type l3type,
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+				 lookup_by_table_id_t fn)
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+{
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+	return -EOPNOTSUPP;
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+}
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+
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+static inline
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+void l3mdev_table_lookup_unregister(enum l3mdev_type l3type,
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+				    lookup_by_table_id_t fn)
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+{
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+}
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+
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+static inline
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+int l3mdev_ifindex_lookup_by_table_id(enum l3mdev_type l3type, struct net *net,
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+				      u32 table_id)
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+{
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+	return -ENODEV;
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+}
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+
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+static inline
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 int l3mdev_fib_rule_match(struct net *net, struct flowi *fl,
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 			  struct fib_lookup_arg *arg)
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 {