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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/net/bridge/br_private_mcast_eht.h
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/* SPDX-License-Identifier: GPL-2.0-or-later

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 * Copyright (c) 2020, Nikolay Aleksandrov <[email protected]>

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 */

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#ifndef _BR_PRIVATE_MCAST_EHT_H_

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#define _BR_PRIVATE_MCAST_EHT_H_

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#define BR_MCAST_DEFAULT_EHT_HOSTS_LIMIT 512

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union net_bridge_eht_addr {

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	__be32				ip4;

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#if IS_ENABLED(CONFIG_IPV6)

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	struct in6_addr			ip6;

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#endif

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};

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/* single host's list of set entries and filter_mode */

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struct net_bridge_group_eht_host {

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	struct rb_node			rb_node;

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	union net_bridge_eht_addr	h_addr;

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	struct hlist_head		set_entries;

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	unsigned int			num_entries;

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	unsigned char			filter_mode;

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	struct net_bridge_port_group	*pg;

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};

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/* (host, src entry) added to a per-src set and host's list */

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struct net_bridge_group_eht_set_entry {

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	struct rb_node			rb_node;

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	struct hlist_node		host_list;

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	union net_bridge_eht_addr	h_addr;

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	struct timer_list		timer;

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	struct net_bridge		*br;

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	struct net_bridge_group_eht_set	*eht_set;

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	struct net_bridge_group_eht_host *h_parent;

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	struct net_bridge_mcast_gc	mcast_gc;

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};

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/* per-src set */

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struct net_bridge_group_eht_set {

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	struct rb_node			rb_node;

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	union net_bridge_eht_addr	src_addr;

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	struct rb_root			entry_tree;

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	struct timer_list		timer;

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	struct net_bridge_port_group	*pg;

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	struct net_bridge		*br;

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	struct net_bridge_mcast_gc	mcast_gc;

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};

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#ifdef CONFIG_BRIDGE_IGMP_SNOOPING

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void br_multicast_eht_clean_sets(struct net_bridge_port_group *pg);

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bool br_multicast_eht_handle(const struct net_bridge_mcast *brmctx,

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			     struct net_bridge_port_group *pg,

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			     void *h_addr,

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			     void *srcs,

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			     u32 nsrcs,

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			     size_t addr_size,

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			     int grec_type);

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int br_multicast_eht_set_hosts_limit(struct net_bridge_port *p,

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				     u32 eht_hosts_limit);

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static inline bool

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br_multicast_eht_should_del_pg(const struct net_bridge_port_group *pg)

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{

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	return !!((pg->key.port->flags & BR_MULTICAST_FAST_LEAVE) &&

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		  RB_EMPTY_ROOT(&pg->eht_host_tree));

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}

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static inline bool

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br_multicast_eht_hosts_over_limit(const struct net_bridge_port_group *pg)

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{

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	const struct net_bridge_port *p = pg->key.port;

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	return !!(p->multicast_eht_hosts_cnt >= p->multicast_eht_hosts_limit);

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}

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static inline void br_multicast_eht_hosts_inc(struct net_bridge_port_group *pg)

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{

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	struct net_bridge_port *p = pg->key.port;

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	p->multicast_eht_hosts_cnt++;

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}

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static inline void br_multicast_eht_hosts_dec(struct net_bridge_port_group *pg)

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{

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	struct net_bridge_port *p = pg->key.port;

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	p->multicast_eht_hosts_cnt--;

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}

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#endif /* CONFIG_BRIDGE_IGMP_SNOOPING */

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#endif /* _BR_PRIVATE_MCAST_EHT_H_ */

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