From 1ca4aa9cd4cc075e3fddbba80fd2ed2f479bfb22 Mon Sep 17 00:00:00 2001 From: Vivien Didelot Date: Wed, 7 Jun 2017 18:12:14 -0400 Subject: [PATCH] net: dsa: check VLAN capability of every switch Now that the VLAN object is propagated to every switch chip of the switch fabric, we can easily ensure that they all support the required VLAN operations before modifying an entry on a single switch. To achieve that, remove the condition skipping other target switches, and add a bitmap of VLAN members, eventually containing the target port, if we are programming the switch target. This will allow us to easily add other VLAN members, such as the DSA or CPU ports (to introduce cross-chip VLAN support) or the other port members if we want to reduce hardware accesses later. Reviewed-by: Florian Fainelli Signed-off-by: Vivien Didelot Signed-off-by: David S. Miller --- net/dsa/switch.c | 27 +++++++++++++++++---------- 1 file changed, 17 insertions(+), 10 deletions(-) diff --git a/net/dsa/switch.c b/net/dsa/switch.c index d8e5c311ee7c..f235ae1e9777 100644 --- a/net/dsa/switch.c +++ b/net/dsa/switch.c @@ -159,19 +159,27 @@ static int dsa_switch_vlan_add(struct dsa_switch *ds, { const struct switchdev_obj_port_vlan *vlan = info->vlan; struct switchdev_trans *trans = info->trans; + DECLARE_BITMAP(members, 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 VLAN members */ + bitmap_zero(members, ds->num_ports); + if (ds->index == info->sw_index) + set_bit(info->port, members); if (switchdev_trans_ph_prepare(trans)) { if (!ds->ops->port_vlan_prepare || !ds->ops->port_vlan_add) return -EOPNOTSUPP; - return ds->ops->port_vlan_prepare(ds, info->port, vlan, trans); + for_each_set_bit(port, members, ds->num_ports) { + err = ds->ops->port_vlan_prepare(ds, port, vlan, trans); + if (err) + return err; + } } - ds->ops->port_vlan_add(ds, info->port, vlan, trans); + for_each_set_bit(port, members, ds->num_ports) + ds->ops->port_vlan_add(ds, port, vlan, trans); return 0; } @@ -181,14 +189,13 @@ static int dsa_switch_vlan_del(struct dsa_switch *ds, { const struct switchdev_obj_port_vlan *vlan = info->vlan; - /* Do not care yet about other switch chips of the fabric */ - if (ds->index != info->sw_index) - return 0; - if (!ds->ops->port_vlan_del) return -EOPNOTSUPP; - return ds->ops->port_vlan_del(ds, info->port, vlan); + if (ds->index == info->sw_index) + return ds->ops->port_vlan_del(ds, info->port, vlan); + + return 0; } static int dsa_switch_event(struct notifier_block *nb, -- 2.30.2