From e18f4c18ab5b0dd47caaf8377c2e36d66f632a8c Mon Sep 17 00:00:00 2001 From: Vladimir Oltean Date: Fri, 12 Feb 2021 17:15:55 +0200 Subject: net: switchdev: pass flags and mask to both {PRE_,}BRIDGE_FLAGS attributes This switchdev attribute offers a counterproductive API for a driver writer, because although br_switchdev_set_port_flag gets passed a "flags" and a "mask", those are passed piecemeal to the driver, so while the PRE_BRIDGE_FLAGS listener knows what changed because it has the "mask", the BRIDGE_FLAGS listener doesn't, because it only has the final value. But certain drivers can offload only certain combinations of settings, like for example they cannot change unicast flooding independently of multicast flooding - they must be both on or both off. The way the information is passed to switchdev makes drivers not expressive enough, and unable to reject this request ahead of time, in the PRE_BRIDGE_FLAGS notifier, so they are forced to reject it during the deferred BRIDGE_FLAGS attribute, where the rejection is currently ignored. This patch also changes drivers to make use of the "mask" field for edge detection when possible. Signed-off-by: Vladimir Oltean Reviewed-by: Grygorii Strashko Reviewed-by: Florian Fainelli Signed-off-by: David S. Miller --- drivers/staging/fsl-dpaa2/ethsw/ethsw.c | 34 ++++++++++++++++++++------------- 1 file changed, 21 insertions(+), 13 deletions(-) (limited to 'drivers/staging') diff --git a/drivers/staging/fsl-dpaa2/ethsw/ethsw.c b/drivers/staging/fsl-dpaa2/ethsw/ethsw.c index ca3d07fe7f58..703055e063ff 100644 --- a/drivers/staging/fsl-dpaa2/ethsw/ethsw.c +++ b/drivers/staging/fsl-dpaa2/ethsw/ethsw.c @@ -908,31 +908,39 @@ static int dpaa2_switch_port_attr_stp_state_set(struct net_device *netdev, return dpaa2_switch_port_set_stp_state(port_priv, state); } -static int dpaa2_switch_port_attr_br_flags_pre_set(struct net_device *netdev, - unsigned long flags) +static int +dpaa2_switch_port_attr_br_flags_pre_set(struct net_device *netdev, + struct switchdev_brport_flags flags) { - if (flags & ~(BR_LEARNING | BR_FLOOD)) + if (flags.mask & ~(BR_LEARNING | BR_FLOOD)) return -EINVAL; return 0; } -static int dpaa2_switch_port_attr_br_flags_set(struct net_device *netdev, - unsigned long flags) +static int +dpaa2_switch_port_attr_br_flags_set(struct net_device *netdev, + struct switchdev_brport_flags flags) { struct ethsw_port_priv *port_priv = netdev_priv(netdev); int err = 0; - /* Learning is enabled per switch */ - err = dpaa2_switch_set_learning(port_priv->ethsw_data, - !!(flags & BR_LEARNING)); - if (err) - goto exit; + if (flags.mask & BR_LEARNING) { + /* Learning is enabled per switch */ + err = dpaa2_switch_set_learning(port_priv->ethsw_data, + !!(flags.val & BR_LEARNING)); + if (err) + return err; + } - err = dpaa2_switch_port_set_flood(port_priv, !!(flags & BR_FLOOD)); + if (flags.mask & BR_FLOOD) { + err = dpaa2_switch_port_set_flood(port_priv, + !!(flags.val & BR_FLOOD)); + if (err) + return err; + } -exit: - return err; + return 0; } static int dpaa2_switch_port_attr_set(struct net_device *netdev, -- cgit v1.2.3