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net: bridge: multicast: make tracked EHT hosts limit configurable

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Add two new port attributes which make EHT hosts limit configurable and
export the current number of tracked EHT hosts:
 - IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT: configure/retrieve current limit
 - IFLA_BRPORT_MCAST_EHT_HOSTS_CNT: current number of tracked hosts
Setting IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT to 0 is currently not allowed.

Note that we have to increase RTNL_SLAVE_MAX_TYPE to 38 minimum, I've
increased it to 40 to have space for two more future entries.

v2: move br_multicast_eht_set_hosts_limit() to br_multicast_eht.c,
    no functional change

Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Nikolay Aleksandrov
2021-01-26 11:35:33 +02:00
committed by Jakub Kicinski
parent 89268b056e
commit 2dba407f99
6 changed files with 64 additions and 2 deletions
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2
include/uapi/linux/if_link.h
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@@ -525,6 +525,8 @@ enum {
IFLA_BRPORT_BACKUP_PORT,
IFLA_BRPORT_MRP_RING_OPEN,
IFLA_BRPORT_MRP_IN_OPEN,
IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT,
IFLA_BRPORT_MCAST_EHT_HOSTS_CNT,
__IFLA_BRPORT_MAX
};
#define IFLA_BRPORT_MAX (__IFLA_BRPORT_MAX - 1)