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f82e7e96a0
Refreshed all patches. The following patches were applied upstream: * 755-v5.8-net-dsa-add-GRO-support-via-gro_cells.patch * 831-v5.9-usbip-tools-fix-build-error-for-multiple-definition.patch Compile-tested on: x86_64, ipq40xx, ath79 Runtime-tested on: x86_64, ipq40xx, ath79 Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
122 lines
4.4 KiB
Diff
122 lines
4.4 KiB
Diff
From 54a0ed0df49609f4e3f098f8943e38e389dc2e15 Mon Sep 17 00:00:00 2001
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From: Russell King <rmk+kernel@armlinux.org.uk>
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Date: Tue, 12 May 2020 20:20:25 +0300
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Subject: net: dsa: provide an option for drivers to always receive bridge
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VLANs
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DSA assumes that a bridge which has vlan filtering disabled is not
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vlan aware, and ignores all vlan configuration. However, the kernel
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software bridge code allows configuration in this state.
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This causes the kernel's idea of the bridge vlan state and the
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hardware state to disagree, so "bridge vlan show" indicates a correct
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configuration but the hardware lacks all configuration. Even worse,
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enabling vlan filtering on a DSA bridge immediately blocks all traffic
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which, given the output of "bridge vlan show", is very confusing.
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Provide an option that drivers can set to indicate they want to receive
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vlan configuration even when vlan filtering is disabled. At the very
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least, this is safe for Marvell DSA bridges, which do not look up
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ingress traffic in the VTU if the port is in 8021Q disabled state. It is
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also safe for the Ocelot switch family. Whether this change is suitable
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for all DSA bridges is not known.
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Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
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Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
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Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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include/net/dsa.h | 7 +++++++
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net/dsa/dsa_priv.h | 1 +
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net/dsa/port.c | 14 ++++++++++++++
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net/dsa/slave.c | 8 ++++----
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4 files changed, 26 insertions(+), 4 deletions(-)
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--- a/include/net/dsa.h
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+++ b/include/net/dsa.h
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@@ -270,6 +270,13 @@ struct dsa_switch {
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*/
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bool vlan_filtering_is_global;
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+ /* Pass .port_vlan_add and .port_vlan_del to drivers even for bridges
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+ * that have vlan_filtering=0. All drivers should ideally set this (and
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+ * then the option would get removed), but it is unknown whether this
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+ * would break things or not.
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+ */
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+ bool configure_vlan_while_not_filtering;
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+
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/* In case vlan_filtering_is_global is set, the VLAN awareness state
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* should be retrieved from here and not from the per-port settings.
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*/
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--- a/net/dsa/dsa_priv.h
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+++ b/net/dsa/dsa_priv.h
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@@ -139,6 +139,7 @@ int dsa_port_bridge_join(struct dsa_port
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void dsa_port_bridge_leave(struct dsa_port *dp, struct net_device *br);
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int dsa_port_vlan_filtering(struct dsa_port *dp, bool vlan_filtering,
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struct switchdev_trans *trans);
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+bool dsa_port_skip_vlan_configuration(struct dsa_port *dp);
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int dsa_port_ageing_time(struct dsa_port *dp, clock_t ageing_clock,
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struct switchdev_trans *trans);
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int dsa_port_fdb_add(struct dsa_port *dp, const unsigned char *addr,
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--- a/net/dsa/port.c
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+++ b/net/dsa/port.c
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@@ -238,6 +238,20 @@ int dsa_port_vlan_filtering(struct dsa_p
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return 0;
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}
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+/* This enforces legacy behavior for switch drivers which assume they can't
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+ * receive VLAN configuration when enslaved to a bridge with vlan_filtering=0
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+ */
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+bool dsa_port_skip_vlan_configuration(struct dsa_port *dp)
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+{
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+ struct dsa_switch *ds = dp->ds;
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+
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+ if (!dp->bridge_dev)
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+ return false;
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+
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+ return (!ds->configure_vlan_while_not_filtering &&
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+ !br_vlan_enabled(dp->bridge_dev));
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+}
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+
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int dsa_port_ageing_time(struct dsa_port *dp, clock_t ageing_clock,
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struct switchdev_trans *trans)
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{
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--- a/net/dsa/slave.c
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+++ b/net/dsa/slave.c
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@@ -319,7 +319,7 @@ static int dsa_slave_vlan_add(struct net
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if (obj->orig_dev != dev)
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return -EOPNOTSUPP;
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- if (dp->bridge_dev && !br_vlan_enabled(dp->bridge_dev))
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+ if (dsa_port_skip_vlan_configuration(dp))
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return 0;
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vlan = *SWITCHDEV_OBJ_PORT_VLAN(obj);
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@@ -386,7 +386,7 @@ static int dsa_slave_vlan_del(struct net
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if (obj->orig_dev != dev)
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return -EOPNOTSUPP;
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- if (dp->bridge_dev && !br_vlan_enabled(dp->bridge_dev))
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+ if (dsa_port_skip_vlan_configuration(dp))
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return 0;
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/* Do not deprogram the CPU port as it may be shared with other user
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@@ -1118,7 +1118,7 @@ static int dsa_slave_vlan_rx_add_vid(str
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* need to emulate the switchdev prepare + commit phase.
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*/
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if (dp->bridge_dev) {
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- if (!br_vlan_enabled(dp->bridge_dev))
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+ if (dsa_port_skip_vlan_configuration(dp))
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return 0;
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/* br_vlan_get_info() returns -EINVAL or -ENOENT if the
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@@ -1152,7 +1152,7 @@ static int dsa_slave_vlan_rx_kill_vid(st
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* need to emulate the switchdev prepare + commit phase.
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*/
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if (dp->bridge_dev) {
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- if (!br_vlan_enabled(dp->bridge_dev))
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+ if (dsa_port_skip_vlan_configuration(dp))
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return 0;
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/* br_vlan_get_info() returns -EINVAL or -ENOENT if the
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