diff options
| author | Tobias Waldekranz <tobias@waldekranz.com> | 2022-03-16 16:08:52 +0100 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2022-03-18 00:49:58 +0100 |
| commit | 332afc4c8c0da3a451745c5d809f908006745c0d (patch) | |
| tree | 32bae9abb5c33461fcf83b6a025533c1ef8f4ec7 /net/dsa/port.c | |
| parent | net: bridge: mst: Add helper to query a port's MST state (diff) | |
| download | linux-332afc4c8c0da3a451745c5d809f908006745c0d.tar.xz linux-332afc4c8c0da3a451745c5d809f908006745c0d.zip | |
net: dsa: Validate hardware support for MST
When joining a bridge where MST is enabled, we validate that the
proper offloading support is in place, otherwise we fallback to
software bridging.
When then mode is changed on a bridge in which we are members, we
refuse the change if offloading is not supported.
At the moment we only check for configurable learning, but this will
be further restricted as we support more MST related switchdev events.
Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/dsa/port.c')
| -rw-r--r-- | net/dsa/port.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/net/dsa/port.c b/net/dsa/port.c index 58291df14cdb..02214033cec0 100644 --- a/net/dsa/port.c +++ b/net/dsa/port.c @@ -321,6 +321,11 @@ static void dsa_port_bridge_destroy(struct dsa_port *dp, kfree(bridge); } +static bool dsa_port_supports_mst(struct dsa_port *dp) +{ + return dsa_port_can_configure_learning(dp); +} + int dsa_port_bridge_join(struct dsa_port *dp, struct net_device *br, struct netlink_ext_ack *extack) { @@ -334,6 +339,9 @@ int dsa_port_bridge_join(struct dsa_port *dp, struct net_device *br, struct net_device *brport_dev; int err; + if (br_mst_enabled(br) && !dsa_port_supports_mst(dp)) + return -EOPNOTSUPP; + /* Here the interface is already bridged. Reflect the current * configuration so that drivers can program their chips accordingly. */ @@ -735,6 +743,20 @@ int dsa_port_ageing_time(struct dsa_port *dp, clock_t ageing_clock) return 0; } +int dsa_port_mst_enable(struct dsa_port *dp, bool on, + struct netlink_ext_ack *extack) +{ + if (!on) + return 0; + + if (!dsa_port_supports_mst(dp)) { + NL_SET_ERR_MSG_MOD(extack, "Hardware does not support MST"); + return -EINVAL; + } + + return 0; +} + int dsa_port_pre_bridge_flags(const struct dsa_port *dp, struct switchdev_brport_flags flags, struct netlink_ext_ack *extack) |