linux/net/bridge
Ido Schimmel b9109b5b77 bridge: mcast: Dump MDB entries even when snooping is disabled
Currently, the bridge driver does not dump MDB entries when multicast
snooping is disabled although the entries are present in the kernel:

 # bridge mdb add dev br0 port swp1 grp 239.1.1.1 permanent
 # bridge mdb show dev br0
 dev br0 port swp1 grp 239.1.1.1 permanent
 dev br0 port br0 grp ff02::6a temp
 dev br0 port br0 grp ff02::1:ff9d:e61b temp
 # ip link set dev br0 type bridge mcast_snooping 0
 # bridge mdb show dev br0
 # ip link set dev br0 type bridge mcast_snooping 1
 # bridge mdb show dev br0
 dev br0 port swp1 grp 239.1.1.1 permanent
 dev br0 port br0 grp ff02::6a temp
 dev br0 port br0 grp ff02::1:ff9d:e61b temp

This behavior differs from other netlink dump interfaces that dump
entries regardless if they are used or not. For example, VLANs are
dumped even when VLAN filtering is disabled:

 # ip link set dev br0 type bridge vlan_filtering 0
 # bridge vlan show dev swp1
 port              vlan-id
 swp1              1 PVID Egress Untagged

Remove the check and always dump MDB entries:

 # bridge mdb add dev br0 port swp1 grp 239.1.1.1 permanent
 # bridge mdb show dev br0
 dev br0 port swp1 grp 239.1.1.1 permanent
 dev br0 port br0 grp ff02::6a temp
 dev br0 port br0 grp ff02::1:ffeb:1a4d temp
 # ip link set dev br0 type bridge mcast_snooping 0
 # bridge mdb show dev br0
 dev br0 port swp1 grp 239.1.1.1 permanent
 dev br0 port br0 grp ff02::6a temp
 dev br0 port br0 grp ff02::1:ffeb:1a4d temp
 # ip link set dev br0 type bridge mcast_snooping 1
 # bridge mdb show dev br0
 dev br0 port swp1 grp 239.1.1.1 permanent
 dev br0 port br0 grp ff02::6a temp
 dev br0 port br0 grp ff02::1:ffeb:1a4d temp

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2023-10-27 10:51:41 +01:00
..
netfilter netfilter: ebtables: fix fortify warnings in size_entry_mwt() 2023-08-22 15:13:20 +02:00
br_arp_nd_proxy.c bridge: Add per-{Port, VLAN} neighbor suppression data path support 2023-04-21 08:25:50 +01:00
br_cfm_netlink.c
br_cfm.c bridge: cfm: remove redundant return 2021-06-22 10:35:15 -07:00
br_device.c skbuff: bridge: Add layer 2 miss indication 2023-05-30 23:37:00 -07:00
br_fdb.c net: bridge: Track and limit dynamically learned FDB entries 2023-10-17 17:39:01 -07:00
br_forward.c net: bridge: use DEV_STATS_INC() 2023-09-19 13:35:15 +02:00
br_if.c net: bridge: keep ports without IFF_UNICAST_FLT in BR_PROMISC mode 2023-07-03 09:11:34 +01:00
br_input.c net: bridge: use DEV_STATS_INC() 2023-09-19 13:35:15 +02:00
br_ioctl.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next 2021-12-31 14:35:40 +00:00
br_mdb.c bridge: mcast: Dump MDB entries even when snooping is disabled 2023-10-27 10:51:41 +01:00
br_mrp_netlink.c
br_mrp_switchdev.c bridge: mrp: Extend br_mrp_switchdev to detect better the errors 2021-02-16 14:47:46 -08:00
br_mrp.c net: bridge: mrp: Update the Test frames for MRA 2021-06-28 15:46:10 -07:00
br_mst.c net: bridge: mst: Add helper to query a port's MST state 2022-03-17 16:49:58 -07:00
br_multicast_eht.c treewide: Convert del_timer*() to timer_shutdown*() 2022-12-25 13:38:09 -08:00
br_multicast.c net: bridge: Add netlink knobs for number / maximum MDB entries 2023-02-06 08:48:26 +00:00
br_netfilter_hooks.c br_netfilter: use single forward hook for ip and arp 2023-10-24 13:16:29 +02:00
br_netfilter_ipv6.c netfilter: bridge: convert br_netfilter to NF_DROP_REASON 2023-10-18 10:26:43 +02:00
br_netlink_tunnel.c net: bridge: Set strict_start_type at two policies 2023-02-06 08:48:25 +00:00
br_netlink.c net: bridge: Set strict_start_type for br_policy 2023-10-17 17:39:02 -07:00
br_nf_core.c net: dst: Switch to rcuref_t reference counting 2023-03-28 18:52:28 -07:00
br_private_cfm.h
br_private_mcast_eht.h net: bridge: multicast: use multicast contexts instead of bridge or port 2021-07-20 05:41:19 -07:00
br_private_mrp.h net: bridge: mrp: Update the Test frames for MRA 2021-06-28 15:46:10 -07:00
br_private_stp.h
br_private_tunnel.h bridge: always declare tunnel functions 2023-05-17 21:28:58 -07:00
br_private.h net: bridge: Track and limit dynamically learned FDB entries 2023-10-17 17:39:01 -07:00
br_stp_bpdu.c
br_stp_if.c net: use eth_hw_addr_set() 2021-10-02 14:18:25 +01:00
br_stp_timer.c
br_stp.c net: bridge: mst: Multiple Spanning Tree (MST) mode 2022-03-17 16:49:57 -07:00
br_switchdev.c net: switchdev: Add a helper to replay objects on a bridge port 2023-07-21 08:54:03 +01:00
br_sysfs_br.c bridge: Fix flushing of dynamic FDB entries 2022-11-02 20:47:09 -07:00
br_sysfs_if.c bridge: move from strlcpy with unused retval to strscpy 2022-08-22 17:57:30 -07:00
br_vlan_options.c bridge: vlan: Allow setting VLAN neighbor suppression state 2023-04-21 08:25:50 +01:00
br_vlan_tunnel.c bridge: Add backup nexthop ID support 2023-07-19 10:53:49 +01:00
br_vlan.c bridge: vlan: Allow setting VLAN neighbor suppression state 2023-04-21 08:25:50 +01:00
br.c net: switchdev: Add a helper to replay objects on a bridge port 2023-07-21 08:54:03 +01:00
Kconfig
Makefile net: bridge: mst: Multiple Spanning Tree (MST) mode 2022-03-17 16:49:57 -07:00