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net: bridge: multicast: add EHT structures and definitions 

Add EHT structures for tracking hosts and sources per group. We keep one
set for each host which has all of the host's S,G entries, and one set for
each multicast source which has all hosts that have joined that S,G. For
each host, source entry we record the filter_mode and we keep an expiry
timer. There is also one global expiry timer per source set, it is
updated with each set entry update, it will be later used to lower the
set's timer instead of lowering each entry's timer separately.

Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Nikolay Aleksandrov 2021-01-20 16:51:54 +02:00 committed by Jakub Kicinski
parent e7cfcf2c18
commit 8f07b83119
3 changed files with 53 additions and 0 deletions
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1
net/bridge/br_multicast.c
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@ -33,6 +33,7 @@
#endif
#include "br_private.h"
#include "br_private_mcast_eht.h"
static const struct rhashtable_params br_mdb_rht_params = {
.head_offset = offsetof(struct net_bridge_mdb_entry, rhnode),

2
net/bridge/br_private.h
View File

@ -252,6 +252,8 @@ struct net_bridge_port_group {
struct timer_list timer;
struct timer_list rexmit_timer;
struct hlist_node mglist;
struct rb_root eht_set_tree;
struct rb_root eht_host_tree;
struct rhash_head rhnode;
struct net_bridge_mcast_gc mcast_gc;

50
net/bridge/br_private_mcast_eht.h Normal file
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@ -0,0 +1,50 @@
/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright (c) 2020, Nikolay Aleksandrov <nikolay@nvidia.com>
*/
#ifndef _BR_PRIVATE_MCAST_EHT_H_
#define _BR_PRIVATE_MCAST_EHT_H_
union net_bridge_eht_addr {
__be32 ip4;
#if IS_ENABLED(CONFIG_IPV6)
struct in6_addr ip6;
#endif
};
/* single host's list of set entries and filter_mode */
struct net_bridge_group_eht_host {
struct rb_node rb_node;
union net_bridge_eht_addr h_addr;
struct hlist_head set_entries;
unsigned int num_entries;
unsigned char filter_mode;
struct net_bridge_port_group *pg;
};
/* (host, src entry) added to a per-src set and host's list */
struct net_bridge_group_eht_set_entry {
struct rb_node rb_node;
struct hlist_node host_list;
union net_bridge_eht_addr h_addr;
struct timer_list timer;
struct net_bridge *br;
struct net_bridge_group_eht_set *eht_set;
struct net_bridge_group_eht_host *h_parent;
struct net_bridge_mcast_gc mcast_gc;
};
/* per-src set */
struct net_bridge_group_eht_set {
struct rb_node rb_node;
union net_bridge_eht_addr src_addr;
struct rb_root entry_tree;
struct timer_list timer;
struct net_bridge_port_group *pg;
struct net_bridge *br;
struct net_bridge_mcast_gc mcast_gc;
};
#endif /* _BR_PRIVATE_MCAST_EHT_H_ */