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784b58a327
linux/net/bridge
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Bernhard Thaler 784b58a327 bridge: change BR_GROUPFWD_RESTRICTED to allow forwarding of LLDP frames 
BR_GROUPFWD_RESTRICTED bitmask restricts users from setting values to
/sys/class/net/brX/bridge/group_fwd_mask that allow forwarding of
some IEEE 802.1D Table 7-10 Reserved addresses:

	(MAC Control) 802.3		01-80-C2-00-00-01
	(Link Aggregation) 802.3	01-80-C2-00-00-02
	802.1AB LLDP			01-80-C2-00-00-0E

Change BR_GROUPFWD_RESTRICTED to allow to forward LLDP frames and document
group_fwd_mask.

e.g.
   echo 16384 > /sys/class/net/brX/bridge/group_fwd_mask
allows to forward LLDP frames.

This may be needed for bridge setups used for network troubleshooting or
any other scenario where forwarding of LLDP frames is desired (e.g. bridge
connecting a virtual machine to real switch transmitting LLDP frames that
virtual machine needs to receive).

Tested on a simple bridge setup with two interfaces and host transmitting
LLDP frames on one side of this bridge (used lldpd). Setting group_fwd_mask
as described above lets LLDP frames traverse bridge.

Signed-off-by: Bernhard Thaler <bernhard.thaler@wvnet.at>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-05-05 19:20:28 -04:00
..
netfilter netfilter: nf_tables: switch registers to 32 bit addressing 2015-04-13 17:17:29 +02:00
br_device.c netfilter: bridge: use rcu hook to resolve br_netfilter dependency 2015-03-10 15:03:02 +01:00
br_fdb.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-02-09 14:35:57 -08:00
br_forward.c netfilter: Pass socket pointer down through okfn(). 2015-04-07 15:25:55 -04:00
br_if.c bridge: reset bridge mtu after deleting an interface 2015-03-14 19:12:38 -04:00
br_input.c netfilter: Pass socket pointer down through okfn(). 2015-04-07 15:25:55 -04:00
br_ioctl.c bridge: add space before '(/{', after ',', etc. 2013-12-19 19:27:26 -05:00
br_mdb.c bridge/mdb: remove wrong use of NLM_F_MULTI 2015-04-29 14:59:16 -04:00
br_multicast.c net: Export IGMP/MLD message validation code 2015-05-04 14:49:23 -04:00
br_netfilter.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2015-04-08 18:30:21 +02:00
br_netlink.c bridge/nl: remove wrong use of NLM_F_MULTI 2015-04-29 14:59:16 -04:00
br_nf_core.c net: Remove protocol from struct dst_ops 2015-03-09 16:06:10 -04:00
br_private_stp.h net: 8021q/bluetooth/bridge/can/ceph: Remove extern from function prototypes 2013-10-19 19:12:11 -04:00
br_private.h bridge: change BR_GROUPFWD_RESTRICTED to allow forwarding of LLDP frames 2015-05-05 19:20:28 -04:00
br_stp_bpdu.c netfilter: Pass socket pointer down through okfn(). 2015-04-07 15:25:55 -04:00
br_stp_if.c net: bridge: add a br_set_state helper function 2014-10-01 22:03:50 -04:00
br_stp_timer.c net: bridge: add a br_set_state helper function 2014-10-01 22:03:50 -04:00
br_stp.c bridge: call netdev_sw_port_stp_update when bridge port STP status changes 2014-12-02 20:01:22 -08:00
br_sysfs_br.c bridge: Add a default_pvid sysfs attribute 2014-10-05 21:21:36 -04:00
br_sysfs_if.c bridge: Extend Proxy ARP design to allow optional rules for Wi-Fi 2015-03-05 14:52:23 -05:00
br_vlan.c net: rename vlan_tx_* helpers since "tx" is misleading there 2015-01-13 17:51:08 -05:00
br.c net: bridge: add compile-time assert for cb struct size 2015-03-03 14:07:04 -05:00
Kconfig bridge: Add vlan filtering infrastructure 2013-02-13 19:41:46 -05:00
Makefile netfilter: bridge: build br_nf_core only if required 2014-09-30 14:07:51 -04:00