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dpaa2-switch: add VLAN based mirroring

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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@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ioana Ciornei 2021-07-29 20:18:59 +03:00 committed by David S. Miller
parent e0ead825a1
commit 0f3faece58
1 changed files with 138 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

143
drivers/net/ethernet/freescale/dpaa2/dpaa2-switch-flower.c
View File

@ -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 @@ free_acl_entry:
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);
return dpaa2_switch_acl_tbl_remove_entry(block, 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 0;
}
static int