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author | Vladimir Oltean <vladimir.oltean@nxp.com> | 2021-03-21 01:04:45 +0200 |
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committer | David S. Miller <davem@davemloft.net> | 2021-03-20 19:17:05 -0700 |
commit | a1e6f641e3075fa83403c699e64623ae272080e2 (patch) | |
tree | 9862cba478297531b01ed935f064b1dc60b97508 /drivers/net/dsa | |
parent | dc4aa50b13f1d33fdd813b56bb414714268025ad (diff) | |
download | linux-a1e6f641e3075fa83403c699e64623ae272080e2.tar.gz linux-a1e6f641e3075fa83403c699e64623ae272080e2.tar.bz2 linux-a1e6f641e3075fa83403c699e64623ae272080e2.zip |
Revert "net: dsa: sja1105: Clear VLAN filtering offload netdev feature"
This reverts commit e9bf96943b408e6c99dd13fb01cb907335787c61.
The topic of the reverted patch is the support for switches with global
VLAN filtering, added by commit 061f6a505ac3 ("net: dsa: Add
ndo_vlan_rx_{add, kill}_vid implementation"). Be there a switch with 4
ports swp0 -> swp3, and the following setup:
ip link add br0 type bridge vlan_filtering 1
ip link set swp0 master br0
ip link set swp1 master br0
What would happen with VLAN-tagged traffic received on standalone ports
swp2 and swp3? Well, it would get dropped, were it not for the
.ndo_vlan_rx_add_vid and .ndo_vlan_rx_kill_vid implementations (called
from vlan_vid_add and vlan_vid_del respectively). Basically, for DSA
switches where VLAN filtering is a global attribute, we enforce the
standalone ports to have 'rx-vlan-filter: off [fixed]' in their ethtool
features, which lets the user know that all VLAN-tagged packets that are
not explicitly added in the RX filtering list are dropped.
As for the sja1105 driver, at the time of the reverted patch, it was
operating in a pretty handicapped mode when it had ports under a bridge
with vlan_filtering=1. Specifically, it was unable to terminate traffic
through the CPU port (for further explanation see "Traffic support" in
Documentation/networking/dsa/sja1105.rst).
However, since then, the sja1105 driver has made considerable progress,
and that limitation is no longer as severe now. Specifically, since
commit 2cafa72e516f ("net: dsa: sja1105: add a new
best_effort_vlan_filtering devlink parameter"), the driver is able to
perform CPU termination even when some ports are under bridges with
vlan_filtering=1. Then, since commit 8841f6e63f2c ("net: dsa: sja1105:
make devlink property best_effort_vlan_filtering true by default"), this
even became the default operating mode.
So we can now take advantage of the logic in the DSA core.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/dsa')
-rw-r--r-- | drivers/net/dsa/sja1105/sja1105_main.c | 16 |
1 files changed, 0 insertions, 16 deletions
diff --git a/drivers/net/dsa/sja1105/sja1105_main.c b/drivers/net/dsa/sja1105/sja1105_main.c index 51ea104c63bb..d9c198ca0197 100644 --- a/drivers/net/dsa/sja1105/sja1105_main.c +++ b/drivers/net/dsa/sja1105/sja1105_main.c @@ -3049,21 +3049,6 @@ static void sja1105_teardown(struct dsa_switch *ds) } } -static int sja1105_port_enable(struct dsa_switch *ds, int port, - struct phy_device *phy) -{ - struct net_device *slave; - - if (!dsa_is_user_port(ds, port)) - return 0; - - slave = dsa_to_port(ds, port)->slave; - - slave->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER; - - return 0; -} - static void sja1105_port_disable(struct dsa_switch *ds, int port) { struct sja1105_private *priv = ds->priv; @@ -3491,7 +3476,6 @@ static const struct dsa_switch_ops sja1105_switch_ops = { .get_ethtool_stats = sja1105_get_ethtool_stats, .get_sset_count = sja1105_get_sset_count, .get_ts_info = sja1105_get_ts_info, - .port_enable = sja1105_port_enable, .port_disable = sja1105_port_disable, .port_fdb_dump = sja1105_fdb_dump, .port_fdb_add = sja1105_fdb_add, |