diff options
| author | Vivien Didelot <vivien.didelot@savoirfairelinux.com> | 2017-06-15 22:14:48 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-06-16 21:21:14 +0200 |
| commit | a1a6b7ea7f2de270a51360cc48e7c49f7a283dda (patch) | |
| tree | 973f9656be62d80eccb274d6074ddd2438ae9433 /net/dsa | |
| parent | ibmvnic: driver initialization for kdump/kexec (diff) | |
| download | linux-a1a6b7ea7f2de270a51360cc48e7c49f7a283dda.tar.xz linux-a1a6b7ea7f2de270a51360cc48e7c49f7a283dda.zip | |
net: dsa: add cross-chip multicast support
Similarly to how cross-chip VLAN works, define a bitmap of multicast
group members for a switch, now including its DSA ports, so that
multicast traffic can be sent to all switches of the fabric.
A switch may drop the frames if no user port is a member.
This brings support for multicast in a multi-chip environment.
As of now, all switches of the fabric must support the multicast
operations in order to program a single fabric port.
Reported-by: Jason Cobham <jcobham@questertangent.com>
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Tested-by: Jason Cobham <jcobham@questertangent.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dsa')
| -rw-r--r-- | net/dsa/switch.c | 30 |
1 files changed, 20 insertions, 10 deletions
diff --git a/net/dsa/switch.c b/net/dsa/switch.c index f1029a8d0e20..97e2e9c8cf3f 100644 --- a/net/dsa/switch.c +++ b/net/dsa/switch.c @@ -122,19 +122,30 @@ static int dsa_switch_mdb_add(struct dsa_switch *ds, { const struct switchdev_obj_port_mdb *mdb = info->mdb; struct switchdev_trans *trans = info->trans; + DECLARE_BITMAP(group, ds->num_ports); + int port, err; - /* Do not care yet about other switch chips of the fabric */ - if (ds->index != info->sw_index) - return 0; + /* Build a mask of Multicast group members */ + bitmap_zero(group, ds->num_ports); + if (ds->index == info->sw_index) + set_bit(info->port, group); + for (port = 0; port < ds->num_ports; port++) + if (dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port)) + set_bit(port, group); if (switchdev_trans_ph_prepare(trans)) { if (!ds->ops->port_mdb_prepare || !ds->ops->port_mdb_add) return -EOPNOTSUPP; - return ds->ops->port_mdb_prepare(ds, info->port, mdb, trans); + for_each_set_bit(port, group, ds->num_ports) { + err = ds->ops->port_mdb_prepare(ds, port, mdb, trans); + if (err) + return err; + } } - ds->ops->port_mdb_add(ds, info->port, mdb, trans); + for_each_set_bit(port, group, ds->num_ports) + ds->ops->port_mdb_add(ds, port, mdb, trans); return 0; } @@ -144,14 +155,13 @@ static int dsa_switch_mdb_del(struct dsa_switch *ds, { const struct switchdev_obj_port_mdb *mdb = info->mdb; - /* Do not care yet about other switch chips of the fabric */ - if (ds->index != info->sw_index) - return 0; - if (!ds->ops->port_mdb_del) return -EOPNOTSUPP; - return ds->ops->port_mdb_del(ds, info->port, mdb); + if (ds->index == info->sw_index) + return ds->ops->port_mdb_del(ds, info->port, mdb); + + return 0; } static int dsa_switch_vlan_add(struct dsa_switch *ds, |