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net: bridge: mst: Support setting and reporting MST port states

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Make it possible to change the port state in a given MSTI by extending
the bridge port netlink interface (RTM_SETLINK on PF_BRIDGE).The
proposed iproute2 interface would be:

    bridge mst set dev <PORT> msti <MSTI> state <STATE>

Current states in all applicable MSTIs can also be dumped via a
corresponding RTM_GETLINK. The proposed iproute interface looks like
this:

$ bridge mst
port              msti
vb1               0
		    state forwarding
		  100
		    state disabled
vb2               0
		    state forwarding
		  100
		    state forwarding

The preexisting per-VLAN states are still valid in the MST
mode (although they are read-only), and can be queried as usual if one
is interested in knowing a particular VLAN's state without having to
care about the VID to MSTI mapping (in this example VLAN 20 and 30 are
bound to MSTI 100):

$ bridge -d vlan
port              vlan-id
vb1               10
		    state forwarding mcast_router 1
		  20
		    state disabled mcast_router 1
		  30
		    state disabled mcast_router 1
		  40
		    state forwarding mcast_router 1
vb2               10
		    state forwarding mcast_router 1
		  20
		    state forwarding mcast_router 1
		  30
		    state forwarding mcast_router 1
		  40
		    state forwarding mcast_router 1

Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Tobias Waldekranz 2022-03-16 16:08:45 +01:00 • committed by Jakub Kicinski
parent 8c678d6056
commit 122c29486e
5 changed files with 209 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

16
include/uapi/linux/if_bridge.h
View file

@ -122,6 +122,7 @@ enum {
IFLA_BRIDGE_VLAN_TUNNEL_INFO,
IFLA_BRIDGE_MRP,
IFLA_BRIDGE_CFM,
IFLA_BRIDGE_MST,
__IFLA_BRIDGE_MAX,
};
#define IFLA_BRIDGE_MAX (__IFLA_BRIDGE_MAX - 1)
@ -453,6 +454,21 @@ enum {
#define IFLA_BRIDGE_CFM_CC_PEER_STATUS_MAX (__IFLA_BRIDGE_CFM_CC_PEER_STATUS_MAX - 1)
enum {
IFLA_BRIDGE_MST_UNSPEC,
IFLA_BRIDGE_MST_ENTRY,
__IFLA_BRIDGE_MST_MAX,
};
#define IFLA_BRIDGE_MST_MAX (__IFLA_BRIDGE_MST_MAX - 1)
enum {
IFLA_BRIDGE_MST_ENTRY_UNSPEC,
IFLA_BRIDGE_MST_ENTRY_MSTI,
IFLA_BRIDGE_MST_ENTRY_STATE,
__IFLA_BRIDGE_MST_ENTRY_MAX,
};
#define IFLA_BRIDGE_MST_ENTRY_MAX (__IFLA_BRIDGE_MST_ENTRY_MAX - 1)
struct bridge_stp_xstats {
__u64 transition_blk;
__u64 transition_fwd;

1
include/uapi/linux/rtnetlink.h
View file

@ -817,6 +817,7 @@ enum {
#define RTEXT_FILTER_MRP (1 << 4)
#define RTEXT_FILTER_CFM_CONFIG (1 << 5)
#define RTEXT_FILTER_CFM_STATUS (1 << 6)
#define RTEXT_FILTER_MST (1 << 7)
/* End of information exported to user level */