Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 230 insertions, 0 deletions

diff --git a/include/net/act_api.h b/include/net/act_api.h
new file mode 100644
index 000000000..c48b750de
--- /dev/null
+++ b/include/net/act_api.h
@@ -0,0 +1,230 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __NET_ACT_API_H
+#define __NET_ACT_API_H
+
+/*
+ * Public action API for classifiers/qdiscs
+*/
+
+#include <linux/refcount.h>
+#include <net/sch_generic.h>
+#include <net/pkt_sched.h>
+#include <net/net_namespace.h>
+#include <net/netns/generic.h>
+
+struct tcf_idrinfo {
+	spinlock_t	lock;
+	struct idr	action_idr;
+	struct net	*net;
+};
+
+struct tc_action_ops;
+
+struct tc_action {
+	const struct tc_action_ops	*ops;
+	__u32				type; /* for backward compat(TCA_OLD_COMPAT) */
+	__u32				order;
+	struct tcf_idrinfo		*idrinfo;
+
+	u32				tcfa_index;
+	refcount_t			tcfa_refcnt;
+	atomic_t			tcfa_bindcnt;
+	int				tcfa_action;
+	struct tcf_t			tcfa_tm;
+	struct gnet_stats_basic_packed	tcfa_bstats;
+	struct gnet_stats_queue		tcfa_qstats;
+	struct net_rate_estimator __rcu *tcfa_rate_est;
+	spinlock_t			tcfa_lock;
+	struct gnet_stats_basic_cpu __percpu *cpu_bstats;
+	struct gnet_stats_queue __percpu *cpu_qstats;
+	struct tc_cookie	__rcu *act_cookie;
+	struct tcf_chain	*goto_chain;
+};
+#define tcf_index	common.tcfa_index
+#define tcf_refcnt	common.tcfa_refcnt
+#define tcf_bindcnt	common.tcfa_bindcnt
+#define tcf_action	common.tcfa_action
+#define tcf_tm		common.tcfa_tm
+#define tcf_bstats	common.tcfa_bstats
+#define tcf_qstats	common.tcfa_qstats
+#define tcf_rate_est	common.tcfa_rate_est
+#define tcf_lock	common.tcfa_lock
+
+/* Update lastuse only if needed, to avoid dirtying a cache line.
+ * We use a temp variable to avoid fetching jiffies twice.
+ */
+static inline void tcf_lastuse_update(struct tcf_t *tm)
+{
+	unsigned long now = jiffies;
+
+	if (tm->lastuse != now)
+		tm->lastuse = now;
+	if (unlikely(!tm->firstuse))
+		tm->firstuse = now;
+}
+
+static inline void tcf_tm_dump(struct tcf_t *dtm, const struct tcf_t *stm)
+{
+	dtm->install = jiffies_to_clock_t(jiffies - stm->install);
+	dtm->lastuse = jiffies_to_clock_t(jiffies - stm->lastuse);
+	dtm->firstuse = stm->firstuse ?
+		jiffies_to_clock_t(jiffies - stm->firstuse) : 0;
+	dtm->expires = jiffies_to_clock_t(stm->expires);
+}
+
+#ifdef CONFIG_NET_CLS_ACT
+
+#define ACT_P_CREATED 1
+#define ACT_P_DELETED 1
+
+struct tc_action_ops {
+	struct list_head head;
+	char    kind[IFNAMSIZ];
+	__u32   type; /* TBD to match kind */
+	size_t	size;
+	struct module		*owner;
+	int     (*act)(struct sk_buff *, const struct tc_action *,
+		       struct tcf_result *); /* called under RCU BH lock*/
+	int     (*dump)(struct sk_buff *, struct tc_action *, int, int);
+	void	(*cleanup)(struct tc_action *);
+	int     (*lookup)(struct net *net, struct tc_action **a, u32 index,
+			  struct netlink_ext_ack *extack);
+	int     (*init)(struct net *net, struct nlattr *nla,
+			struct nlattr *est, struct tc_action **act, int ovr,
+			int bind, bool rtnl_held,
+			struct netlink_ext_ack *extack);
+	int     (*walk)(struct net *, struct sk_buff *,
+			struct netlink_callback *, int,
+			const struct tc_action_ops *,
+			struct netlink_ext_ack *);
+	void	(*stats_update)(struct tc_action *, u64, u32, u64);
+	size_t  (*get_fill_size)(const struct tc_action *act);
+	struct net_device *(*get_dev)(const struct tc_action *a);
+	void	(*put_dev)(struct net_device *dev);
+};
+
+struct tc_action_net {
+	struct tcf_idrinfo *idrinfo;
+	const struct tc_action_ops *ops;
+};
+
+static inline
+int tc_action_net_init(struct net *net, struct tc_action_net *tn,
+		       const struct tc_action_ops *ops)
+{
+	int err = 0;
+
+	tn->idrinfo = kmalloc(sizeof(*tn->idrinfo), GFP_KERNEL);
+	if (!tn->idrinfo)
+		return -ENOMEM;
+	tn->ops = ops;
+	tn->idrinfo->net = net;
+	spin_lock_init(&tn->idrinfo->lock);
+	idr_init(&tn->idrinfo->action_idr);
+	return err;
+}
+
+void tcf_idrinfo_destroy(const struct tc_action_ops *ops,
+			 struct tcf_idrinfo *idrinfo);
+
+static inline void tc_action_net_exit(struct list_head *net_list,
+				      unsigned int id)
+{
+	struct net *net;
+
+	rtnl_lock();
+	list_for_each_entry(net, net_list, exit_list) {
+		struct tc_action_net *tn = net_generic(net, id);
+
+		tcf_idrinfo_destroy(tn->ops, tn->idrinfo);
+		kfree(tn->idrinfo);
+	}
+	rtnl_unlock();
+}
+
+int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb,
+		       struct netlink_callback *cb, int type,
+		       const struct tc_action_ops *ops,
+		       struct netlink_ext_ack *extack);
+int tcf_idr_search(struct tc_action_net *tn, struct tc_action **a, u32 index);
+int tcf_idr_create(struct tc_action_net *tn, u32 index, struct nlattr *est,
+		   struct tc_action **a, const struct tc_action_ops *ops,
+		   int bind, bool cpustats);
+void tcf_idr_insert(struct tc_action_net *tn, struct tc_action *a);
+
+void tcf_idr_cleanup(struct tc_action_net *tn, u32 index);
+int tcf_idr_check_alloc(struct tc_action_net *tn, u32 *index,
+			struct tc_action **a, int bind);
+int __tcf_idr_release(struct tc_action *a, bool bind, bool strict);
+
+static inline int tcf_idr_release(struct tc_action *a, bool bind)
+{
+	return __tcf_idr_release(a, bind, false);
+}
+
+int tcf_register_action(struct tc_action_ops *a, struct pernet_operations *ops);
+int tcf_unregister_action(struct tc_action_ops *a,
+			  struct pernet_operations *ops);
+int tcf_action_destroy(struct tc_action *actions[], int bind);
+int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions,
+		    int nr_actions, struct tcf_result *res);
+int tcf_action_init(struct net *net, struct tcf_proto *tp, struct nlattr *nla,
+		    struct nlattr *est, char *name, int ovr, int bind,
+		    struct tc_action *actions[], size_t *attr_size,
+		    bool rtnl_held, struct netlink_ext_ack *extack);
+struct tc_action *tcf_action_init_1(struct net *net, struct tcf_proto *tp,
+				    struct nlattr *nla, struct nlattr *est,
+				    char *name, int ovr, int bind,
+				    bool rtnl_held,
+				    struct netlink_ext_ack *extack);
+int tcf_action_dump(struct sk_buff *skb, struct tc_action *actions[], int bind,
+		    int ref);
+int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int);
+int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int);
+int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int);
+
+#endif /* CONFIG_NET_CLS_ACT */
+
+static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes,
+					   u64 packets, u64 lastuse)
+{
+#ifdef CONFIG_NET_CLS_ACT
+	if (!a->ops->stats_update)
+		return;
+
+	a->ops->stats_update(a, bytes, packets, lastuse);
+#endif
+}
+
+#ifdef CONFIG_NET_CLS_ACT
+int tc_setup_cb_egdev_register(const struct net_device *dev,
+			       tc_setup_cb_t *cb, void *cb_priv);
+void tc_setup_cb_egdev_unregister(const struct net_device *dev,
+				  tc_setup_cb_t *cb, void *cb_priv);
+int tc_setup_cb_egdev_call(const struct net_device *dev,
+			   enum tc_setup_type type, void *type_data,
+			   bool err_stop);
+#else
+static inline
+int tc_setup_cb_egdev_register(const struct net_device *dev,
+			       tc_setup_cb_t *cb, void *cb_priv)
+{
+	return 0;
+}
+
+static inline
+void tc_setup_cb_egdev_unregister(const struct net_device *dev,
+				  tc_setup_cb_t *cb, void *cb_priv)
+{
+}
+
+static inline
+int tc_setup_cb_egdev_call(const struct net_device *dev,
+			   enum tc_setup_type type, void *type_data,
+			   bool err_stop)
+{
+	return 0;
+}
+#endif
+
+#endif