lwn.git/net/bridge/br_multicast.c, branch standardize-docs

bridge: Export multicast enabled state

2017-05-26T19:18:44+00:00

During enslavement to a bridge, after the CHANGEUPPER is sent, the multicast enabled state of the bridge isn't propagated down to the offloading driver unless it's changed. This patch allows such drivers to query the multicast enabled state from the bridge, so that they'll be able to correctly configure their flood tables during port enslavement. In case multicast is disabled, unregistered multicast packets can be treated as broadcast and be flooded through all the bridge ports. Signed-off-by: Ido Schimmel Signed-off-by: Jiri Pirko Reviewed-by: Nikolay Aleksandrov Signed-off-by: David S. Miller

bridge: implement missing ndo_uninit()

2017-04-12T02:22:44+00:00

While the bridge driver implements an ndo_init(), it was missing a symmetric ndo_uninit(), causing the different de-initialization operations to be scattered around its dellink() and destructor(). Implement a symmetric ndo_uninit() and remove the overlapping operations from its dellink() and destructor(). This is a prerequisite for the next patch, as it allows us to have a proper cleanup upon changelink() failure during the bridge's newlink(). Fixes: b6677449dff6 ("bridge: netlink: call br_changelink() during br_dev_newlink()") Signed-off-by: Nikolay Aleksandrov Signed-off-by: Ido Schimmel Signed-off-by: David S. Miller

switchdev: bridge: Offload mc router ports

2017-02-10T16:46:39+00:00

Offload the mc router ports list, whenever it is being changed. It is done because in some cases mc packets needs to be flooded to all the ports in this list. Signed-off-by: Nogah Frankel Signed-off-by: Yotam Gigi Signed-off-by: Jiri Pirko Acked-by: Ivan Vecera Signed-off-by: David S. Miller

bridge: mcast: Merge the mc router ports deletions to one function

2017-02-10T16:46:38+00:00

There are three places where a port gets deleted from the mc router port list. This patch join the actual deletion to one function. It will be helpful for later patch that will offload changes in the mc router ports list. Signed-off-by: Nogah Frankel Signed-off-by: Yotam Gigi Signed-off-by: Jiri Pirko Acked-by: Ivan Vecera Signed-off-by: David S. Miller

switchdev: bridge: Offload multicast disabled

2017-02-10T16:46:38+00:00

Offload multicast disabled flag, for more accurate mc flood behavior: When it is on, the mdb should be ignored. When it is off, unregistered mc packets should be flooded to mc router ports. Signed-off-by: Nogah Frankel Signed-off-by: Yotam Gigi Signed-off-by: Jiri Pirko Acked-by: Ivan Vecera Signed-off-by: David S. Miller

bridge: multicast to unicast

2017-01-24T17:39:52+00:00

Implements an optional, per bridge port flag and feature to deliver multicast packets to any host on the according port via unicast individually. This is done by copying the packet per host and changing the multicast destination MAC to a unicast one accordingly. multicast-to-unicast works on top of the multicast snooping feature of the bridge. Which means unicast copies are only delivered to hosts which are interested in it and signalized this via IGMP/MLD reports previously. This feature is intended for interface types which have a more reliable and/or efficient way to deliver unicast packets than broadcast ones (e.g. wifi). However, it should only be enabled on interfaces where no IGMPv2/MLDv1 report suppression takes place. This feature is disabled by default. The initial patch and idea is from Felix Fietkau. Signed-off-by: Felix Fietkau [linus.luessing@c0d3.blue: various bug + style fixes, commit message] Signed-off-by: Linus Lüssing Reviewed-by: Nikolay Aleksandrov Signed-off-by: David S. Miller

bridge: sparse fixes in br_ip6_multicast_alloc_query()

2017-01-17T20:22:05+00:00

Changed type of csum field in struct igmpv3_query from __be16 to __sum16 to eliminate type warning, made same change in struct igmpv3_report for consistency. Fixed up an ntohs() where htons() should have been used instead. Signed-off-by: Lance Richardson Acked-by: Stephen Hemminger Signed-off-by: David S. Miller

bridge: mcast: add MLDv2 querier support

2016-11-21T18:16:58+00:00

This patch adds basic support for MLDv2 queries, the default is MLDv1 as before. A new multicast option - multicast_mld_version, adds the ability to change it between 1 and 2 via netlink and sysfs. The MLD option is disabled if CONFIG_IPV6 is disabled. Signed-off-by: Nikolay Aleksandrov Signed-off-by: David S. Miller

bridge: mcast: add IGMPv3 query support

2016-11-21T18:16:58+00:00

This patch adds basic support for IGMPv3 queries, the default is IGMPv2 as before. A new multicast option - multicast_igmp_version, adds the ability to change it between 2 and 3 via netlink and sysfs. The option struct member is in a 4 byte hole in net_bridge. There also a few minor style adjustments in br_multicast_new_group and br_multicast_add_group. Signed-off-by: Nikolay Aleksandrov Signed-off-by: David S. Miller

bridge: mcast: add router port on PIM hello message

2016-10-31T20:18:30+00:00

When we receive a PIM Hello message on a port we can consider that it has a multicast router attached, thus it is correct to add it to the router list. The only catch is it shouldn't be considered for a querier. Using Daniel's description: leaf-11 leaf-12 leaf-13 \ | / bridge-1 / \ host-11 host-12 - all ports in bridge-1 are in a single vlan aware bridge - leaf-11 is the IGMP querier - leaf-13 is the PIM DR - host-11 TXes packets to 226.10.10.10 - bridge-1 only forwards the 226.10.10.10 traffic out the port to leaf-11, it should also forward this traffic out the port to leaf-13 Suggested-by: Daniel Walton Signed-off-by: Nikolay Aleksandrov Signed-off-by: David S. Miller