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authorTobias Waldekranz <tobias@waldekranz.com>2022-03-16 18:08:43 +0300
committerJakub Kicinski <kuba@kernel.org>2022-03-18 02:49:57 +0300
commitec7328b59176227216c461601c6bd0e922232a9b (patch)
tree42fbfdf30ce41467325b69236a234cc200154e6d /net/bridge/br.c
parent54744510fa9c056d388a019c4518a93956bc8db5 (diff)
downloadlinux-ec7328b59176227216c461601c6bd0e922232a9b.tar.xz
net: bridge: mst: Multiple Spanning Tree (MST) mode
Allow the user to switch from the current per-VLAN STP mode to an MST mode. Up to this point, per-VLAN STP states where always isolated from each other. This is in contrast to the MSTP standard (802.1Q-2018, Clause 13.5), where VLANs are grouped into MST instances (MSTIs), and the state is managed on a per-MSTI level, rather that at the per-VLAN level. Perhaps due to the prevalence of the standard, many switching ASICs are built after the same model. Therefore, add a corresponding MST mode to the bridge, which we can later add offloading support for in a straight-forward way. For now, all VLANs are fixed to MSTI 0, also called the Common Spanning Tree (CST). That is, all VLANs will follow the port-global state. Upcoming changes will make this actually useful by allowing VLANs to be mapped to arbitrary MSTIs and allow individual MSTI states to be changed. Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com> Acked-by: Nikolay Aleksandrov <razor@blackwall.org> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/bridge/br.c')
-rw-r--r--net/bridge/br.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/net/bridge/br.c b/net/bridge/br.c
index b1dea3febeea..96e91d69a9a8 100644
--- a/net/bridge/br.c
+++ b/net/bridge/br.c
@@ -265,6 +265,9 @@ int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
case BR_BOOLOPT_MCAST_VLAN_SNOOPING:
err = br_multicast_toggle_vlan_snooping(br, on, extack);
break;
+ case BR_BOOLOPT_MST_ENABLE:
+ err = br_mst_set_enabled(br, on, extack);
+ break;
default:
/* shouldn't be called with unsupported options */
WARN_ON(1);
@@ -281,6 +284,8 @@ int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt)
return br_opt_get(br, BROPT_NO_LL_LEARN);
case BR_BOOLOPT_MCAST_VLAN_SNOOPING:
return br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED);
+ case BR_BOOLOPT_MST_ENABLE:
+ return br_opt_get(br, BROPT_MST_ENABLED);
default:
/* shouldn't be called with unsupported options */
WARN_ON(1);