Re: [PATCH v5 net-next 1/6] net: bridge: add locked entry fdb flag to extend locked port feature
From: <hidden>
Date: 2022-08-28 10:23:44
Also in:
bridge, linux-arm-kernel, linux-kselftest, linux-mediatek, lkml
On 2022-08-27 17:19, Ido Schimmel wrote:
On Fri, Aug 26, 2022 at 01:45:33PM +0200, Hans Schultz wrote:quoted
nbp_switchdev_frame_mark(p, skb);@@ -943,6 +946,10 @@ static int br_setport(struct net_bridge_port *p,struct nlattr *tb[], br_set_port_flag(p, tb, IFLA_BRPORT_NEIGH_SUPPRESS, BR_NEIGH_SUPPRESS); br_set_port_flag(p, tb, IFLA_BRPORT_ISOLATED, BR_ISOLATED); br_set_port_flag(p, tb, IFLA_BRPORT_LOCKED, BR_PORT_LOCKED); + br_set_port_flag(p, tb, IFLA_BRPORT_MAB, BR_PORT_MAB); + + if (!(p->flags & BR_PORT_LOCKED)) + p->flags &= ~BR_PORT_MAB;
The reason for this is that I wanted it to be so that if you have MAB enabled (and locked of course) and unlock the port, it will automatically clear both flags instead of having to first disable MAB and then unlock the port.
quoted hunk ↗ jump to hunk
Any reason not to emit an error if MAB is enabled while the port is unlocked? Something like this (untested):diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c index 5aeb3646e74c..18353a4c29e1 100644 --- a/net/bridge/br_netlink.c +++ b/net/bridge/br_netlink.c@@ -944,6 +944,12 @@ static int br_setport(struct net_bridge_port *p,struct nlattr *tb[], br_set_port_flag(p, tb, IFLA_BRPORT_ISOLATED, BR_ISOLATED); br_set_port_flag(p, tb, IFLA_BRPORT_LOCKED, BR_PORT_LOCKED); + if (!(p->flags & BR_PORT_LOCKED) && (p->flags & BR_PORT_MAB)) { + NL_SET_ERR_MSG(extack, "MAB cannot be enabled when port is unlocked"); + p->flags = old_flags; + return -EINVAL; + } + changed_mask = old_flags ^ p->flags; err = br_switchdev_set_port_flag(p, p->flags, changed_mask, extack);