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Date: Thu, 29 Jul 2021 20:18:59 +0300
From: Ioana Ciornei <ciorneiioana@...il.com>
To: davem@...emloft.net, kuba@...nel.org
Cc: corbet@....net, netdev@...r.kernel.org, linux-doc@...r.kernel.org,
Ioana Ciornei <ioana.ciornei@....com>
Subject: [PATCH net-next 7/9] dpaa2-switch: add VLAN based mirroring
From: Ioana Ciornei <ioana.ciornei@....com>
Using the infrastructure added in the previous patch, extend tc-flower
support with FLOW_ACTION_MIRRED based on VLAN.
Tested with:
tc qdisc add dev eth8 ingress_block 1 clsact
tc filter add block 1 ingress protocol 802.1q flower skip_sw \
vlan_id 100 action mirred egress mirror dev eth6
tc filter del block 1 ingress pref 49152
Signed-off-by: Ioana Ciornei <ioana.ciornei@....com>
---
.../freescale/dpaa2/dpaa2-switch-flower.c | 143 +++++++++++++++++-
1 file changed, 138 insertions(+), 5 deletions(-)
diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-switch-flower.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-switch-flower.c
index efd6d58ca191..3c4f5ada12fd 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-switch-flower.c
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-switch-flower.c
@@ -396,7 +396,9 @@ dpaa2_switch_block_add_mirror(struct dpaa2_switch_filter_block *block,
{
unsigned long block_ports = block->ports;
struct ethsw_core *ethsw = block->ethsw;
+ struct ethsw_port_priv *port_priv;
unsigned long ports_added = 0;
+ u16 vlan = entry->cfg.vlan_id;
bool mirror_port_enabled;
int err, port;
@@ -414,6 +416,19 @@ dpaa2_switch_block_add_mirror(struct dpaa2_switch_filter_block *block,
* ports that share the same filter block.
*/
for_each_set_bit(port, &block_ports, ethsw->sw_attr.num_ifs) {
+ port_priv = ethsw->ports[port];
+
+ /* We cannot add a per VLAN mirroring rule if the VLAN in
+ * question is not installed on the switch port.
+ */
+ if (entry->cfg.filter == DPSW_REFLECTION_FILTER_INGRESS_VLAN &&
+ !(port_priv->vlans[vlan] & ETHSW_VLAN_MEMBER)) {
+ NL_SET_ERR_MSG(extack,
+ "VLAN must be installed on the switch port");
+ err = -EINVAL;
+ goto err_remove_filters;
+ }
+
err = dpsw_if_add_reflection(ethsw->mc_io, 0,
ethsw->dpsw_handle,
port, &entry->cfg);
@@ -511,6 +526,112 @@ dpaa2_switch_cls_flower_replace_acl(struct dpaa2_switch_filter_block *block,
return err;
}
+static int dpaa2_switch_flower_parse_mirror_key(struct flow_cls_offload *cls,
+ u16 *vlan)
+{
+ struct flow_rule *rule = flow_cls_offload_flow_rule(cls);
+ struct flow_dissector *dissector = rule->match.dissector;
+ struct netlink_ext_ack *extack = cls->common.extack;
+
+ if (dissector->used_keys &
+ ~(BIT(FLOW_DISSECTOR_KEY_BASIC) |
+ BIT(FLOW_DISSECTOR_KEY_CONTROL) |
+ BIT(FLOW_DISSECTOR_KEY_VLAN))) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Mirroring is supported only per VLAN");
+ return -EOPNOTSUPP;
+ }
+
+ if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_VLAN)) {
+ struct flow_match_vlan match;
+
+ flow_rule_match_vlan(rule, &match);
+
+ if (match.mask->vlan_priority != 0 ||
+ match.mask->vlan_dei != 0) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Only matching on VLAN ID supported");
+ return -EOPNOTSUPP;
+ }
+
+ if (match.mask->vlan_id != 0xFFF) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Masked matching not supported");
+ return -EOPNOTSUPP;
+ }
+
+ *vlan = (u16)match.key->vlan_id;
+ }
+
+ return 0;
+}
+
+static int
+dpaa2_switch_cls_flower_replace_mirror(struct dpaa2_switch_filter_block *block,
+ struct flow_cls_offload *cls)
+{
+ struct netlink_ext_ack *extack = cls->common.extack;
+ struct dpaa2_switch_mirror_entry *mirror_entry;
+ struct ethsw_core *ethsw = block->ethsw;
+ struct dpaa2_switch_mirror_entry *tmp;
+ struct flow_action_entry *cls_act;
+ struct list_head *pos, *n;
+ bool mirror_port_enabled;
+ u16 if_id, vlan;
+ int err;
+
+ mirror_port_enabled = (ethsw->mirror_port != ethsw->sw_attr.num_ifs);
+ cls_act = &cls->rule->action.entries[0];
+
+ /* Offload rules only when the destination is a DPAA2 switch port */
+ if (!dpaa2_switch_port_dev_check(cls_act->dev)) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Destination not a DPAA2 switch port");
+ return -EOPNOTSUPP;
+ }
+ if_id = dpaa2_switch_get_index(ethsw, cls_act->dev);
+
+ /* We have a single mirror port but can configure egress mirroring on
+ * all the other switch ports. We need to allow mirroring rules only
+ * when the destination port is the same.
+ */
+ if (mirror_port_enabled && ethsw->mirror_port != if_id) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Multiple mirror ports not supported");
+ return -EBUSY;
+ }
+
+ /* Parse the key */
+ err = dpaa2_switch_flower_parse_mirror_key(cls, &vlan);
+ if (err)
+ return err;
+
+ /* Make sure that we don't already have a mirror rule with the same
+ * configuration.
+ */
+ list_for_each_safe(pos, n, &block->mirror_entries) {
+ tmp = list_entry(pos, struct dpaa2_switch_mirror_entry, list);
+
+ if (tmp->cfg.filter == DPSW_REFLECTION_FILTER_INGRESS_VLAN &&
+ tmp->cfg.vlan_id == vlan) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "VLAN mirror filter already installed");
+ return -EBUSY;
+ }
+ }
+
+ mirror_entry = kzalloc(sizeof(*mirror_entry), GFP_KERNEL);
+ if (!mirror_entry)
+ return -ENOMEM;
+
+ mirror_entry->cfg.filter = DPSW_REFLECTION_FILTER_INGRESS_VLAN;
+ mirror_entry->cfg.vlan_id = vlan;
+ mirror_entry->cookie = cls->cookie;
+
+ return dpaa2_switch_block_add_mirror(block, mirror_entry, if_id,
+ extack);
+}
+
int dpaa2_switch_cls_flower_replace(struct dpaa2_switch_filter_block *block,
struct flow_cls_offload *cls)
{
@@ -529,6 +650,8 @@ int dpaa2_switch_cls_flower_replace(struct dpaa2_switch_filter_block *block,
case FLOW_ACTION_TRAP:
case FLOW_ACTION_DROP:
return dpaa2_switch_cls_flower_replace_acl(block, cls);
+ case FLOW_ACTION_MIRRED:
+ return dpaa2_switch_cls_flower_replace_mirror(block, cls);
default:
NL_SET_ERR_MSG_MOD(extack, "Action not supported");
return -EOPNOTSUPP;
@@ -538,13 +661,23 @@ int dpaa2_switch_cls_flower_replace(struct dpaa2_switch_filter_block *block,
int dpaa2_switch_cls_flower_destroy(struct dpaa2_switch_filter_block *block,
struct flow_cls_offload *cls)
{
- struct dpaa2_switch_acl_entry *entry;
+ struct dpaa2_switch_mirror_entry *mirror_entry;
+ struct dpaa2_switch_acl_entry *acl_entry;
- entry = dpaa2_switch_acl_tbl_find_entry_by_cookie(block, cls->cookie);
- if (!entry)
- return 0;
+ /* If this filter is a an ACL one, remove it */
+ acl_entry = dpaa2_switch_acl_tbl_find_entry_by_cookie(block,
+ cls->cookie);
+ if (acl_entry)
+ return dpaa2_switch_acl_tbl_remove_entry(block, acl_entry);
+
+ /* If not, then it has to be a mirror */
+ mirror_entry = dpaa2_switch_mirror_find_entry_by_cookie(block,
+ cls->cookie);
+ if (mirror_entry)
+ return dpaa2_switch_block_remove_mirror(block,
+ mirror_entry);
- return dpaa2_switch_acl_tbl_remove_entry(block, entry);
+ return 0;
}
static int
--
2.31.1
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