write in 30M

hc

2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc

 kernel/include/net/tc_act/tc_tunnel_key.h
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@@ -1,11 +1,7 @@
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+/* SPDX-License-Identifier: GPL-2.0-or-later */
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 /*
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  * Copyright (c) 2016, Amir Vadai <amir@vadai.me>
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  * Copyright (c) 2016, Mellanox Technologies. All rights reserved.
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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_TC_TUNNEL_KEY_H
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@@ -32,9 +28,11 @@
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 {
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 #ifdef CONFIG_NET_CLS_ACT
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 	struct tcf_tunnel_key *t = to_tunnel_key(a);
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-	struct tcf_tunnel_key_params *params = rtnl_dereference(t->params);
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+	struct tcf_tunnel_key_params *params;
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-	if (a->ops && a->ops->type == TCA_ACT_TUNNEL_KEY)
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+	params = rcu_dereference_protected(t->params,
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+					   lockdep_is_held(&a->tcfa_lock));
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+	if (a->ops && a->ops->id == TCA_ID_TUNNEL_KEY)
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 		return params->tcft_action == TCA_TUNNEL_KEY_ACT_SET;
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 #endif
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 	return false;
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@@ -44,9 +42,11 @@
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 {
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 #ifdef CONFIG_NET_CLS_ACT
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 	struct tcf_tunnel_key *t = to_tunnel_key(a);
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-	struct tcf_tunnel_key_params *params = rtnl_dereference(t->params);
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+	struct tcf_tunnel_key_params *params;
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-	if (a->ops && a->ops->type == TCA_ACT_TUNNEL_KEY)
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+	params = rcu_dereference_protected(t->params,
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+					   lockdep_is_held(&a->tcfa_lock));
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+	if (a->ops && a->ops->id == TCA_ID_TUNNEL_KEY)
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 		return params->tcft_action == TCA_TUNNEL_KEY_ACT_RELEASE;
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 #endif
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 	return false;
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@@ -56,11 +56,31 @@
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 {
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 #ifdef CONFIG_NET_CLS_ACT
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 	struct tcf_tunnel_key *t = to_tunnel_key(a);
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-	struct tcf_tunnel_key_params *params = rtnl_dereference(t->params);
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+	struct tcf_tunnel_key_params *params;
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+
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+	params = rcu_dereference_protected(t->params,
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+					   lockdep_is_held(&a->tcfa_lock));
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 	return &params->tcft_enc_metadata->u.tun_info;
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 #else
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 	return NULL;
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 #endif
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 }
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+
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+static inline struct ip_tunnel_info *
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+tcf_tunnel_info_copy(const struct tc_action *a)
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+{
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+#ifdef CONFIG_NET_CLS_ACT
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+	struct ip_tunnel_info *tun = tcf_tunnel_info(a);
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+
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+	if (tun) {
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+		size_t tun_size = sizeof(*tun) + tun->options_len;
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+		struct ip_tunnel_info *tun_copy = kmemdup(tun, tun_size,
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+							  GFP_ATOMIC);
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+
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+		return tun_copy;
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+	}
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+#endif
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+	return NULL;
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+}
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 #endif /* __NET_TC_TUNNEL_KEY_H */