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// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/* Copyright (c) 2020 Marvell International Ltd. All rights reserved */
#include "prestera.h"
#include "prestera_acl.h"
#include "prestera_flower.h"
static int prestera_flower_parse_actions(struct prestera_flow_block *block,
struct prestera_acl_rule *rule,
struct flow_action *flow_action,
struct netlink_ext_ack *extack)
{
struct prestera_acl_rule_action_entry a_entry;
const struct flow_action_entry *act;
int err, i;
if (!flow_action_has_entries(flow_action))
return 0;
flow_action_for_each(i, act, flow_action) {
memset(&a_entry, 0, sizeof(a_entry));
switch (act->id) {
case FLOW_ACTION_ACCEPT:
a_entry.id = PRESTERA_ACL_RULE_ACTION_ACCEPT;
break;
case FLOW_ACTION_DROP:
a_entry.id = PRESTERA_ACL_RULE_ACTION_DROP;
break;
case FLOW_ACTION_TRAP:
a_entry.id = PRESTERA_ACL_RULE_ACTION_TRAP;
break;
default:
NL_SET_ERR_MSG_MOD(extack, "Unsupported action");
pr_err("Unsupported action\n");
return -EOPNOTSUPP;
}
err = prestera_acl_rule_action_add(rule, &a_entry);
if (err)
return err;
}
return 0;
}
static int prestera_flower_parse_meta(struct prestera_acl_rule *rule,
struct flow_cls_offload *f,
struct prestera_flow_block *block)
{
struct flow_rule *f_rule = flow_cls_offload_flow_rule(f);
struct prestera_acl_rule_match_entry m_entry = {0};
struct net_device *ingress_dev;
struct flow_match_meta match;
struct prestera_port *port;
flow_rule_match_meta(f_rule, &match);
if (match.mask->ingress_ifindex != 0xFFFFFFFF) {
NL_SET_ERR_MSG_MOD(f->common.extack,
"Unsupported ingress ifindex mask");
return -EINVAL;
}
ingress_dev = __dev_get_by_index(prestera_acl_block_net(block),
match.key->ingress_ifindex);
if (!ingress_dev) {
NL_SET_ERR_MSG_MOD(f->common.extack,
"Can't find specified ingress port to match on");
return -EINVAL;
}
if (!prestera_netdev_check(ingress_dev)) {
NL_SET_ERR_MSG_MOD(f->common.extack,
"Can't match on switchdev ingress port");
return -EINVAL;
}
port = netdev_priv(ingress_dev);
m_entry.type = PRESTERA_ACL_RULE_MATCH_ENTRY_TYPE_PORT;
m_entry.keymask.u64.key = port->hw_id | ((u64)port->dev_id << 32);
m_entry.keymask.u64.mask = ~(u64)0;
return prestera_acl_rule_match_add(rule, &m_entry);
}
static int prestera_flower_parse(struct prestera_flow_block *block,
struct prestera_acl_rule *rule,
struct flow_cls_offload *f)
{
struct flow_rule *f_rule = flow_cls_offload_flow_rule(f);
struct flow_dissector *dissector = f_rule->match.dissector;
struct prestera_acl_rule_match_entry m_entry;
u16 n_proto_mask = 0;
u16 n_proto_key = 0;
u16 addr_type = 0;
u8 ip_proto = 0;
int err;
if (dissector->used_keys &
~(BIT(FLOW_DISSECTOR_KEY_META) |
BIT(FLOW_DISSECTOR_KEY_CONTROL) |
BIT(FLOW_DISSECTOR_KEY_BASIC) |
BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS) |
BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) |
BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) |
BIT(FLOW_DISSECTOR_KEY_ICMP) |
BIT(FLOW_DISSECTOR_KEY_PORTS) |
BIT(FLOW_DISSECTOR_KEY_VLAN))) {
NL_SET_ERR_MSG_MOD(f->common.extack, "Unsupported key");
return -EOPNOTSUPP;
}
prestera_acl_rule_priority_set(rule, f->common.prio);
if (flow_rule_match_key(f_rule, FLOW_DISSECTOR_KEY_META)) {
err = prestera_flower_parse_meta(rule, f, block);
if (err)
return err;
}
if (flow_rule_match_key(f_rule, FLOW_DISSECTOR_KEY_CONTROL)) {
struct flow_match_control match;
flow_rule_match_control(f_rule, &match);
addr_type = match.key->addr_type;
}
if (flow_rule_match_key(f_rule, FLOW_DISSECTOR_KEY_BASIC)) {
struct flow_match_basic match;
flow_rule_match_basic(f_rule, &match);
n_proto_key = ntohs(match.key->n_proto);
n_proto_mask = ntohs(match.mask->n_proto);
if (n_proto_key == ETH_P_ALL) {
n_proto_key = 0;
n_proto_mask = 0;
}
/* add eth type key,mask */
memset(&m_entry, 0, sizeof(m_entry));
m_entry.type = PRESTERA_ACL_RULE_MATCH_ENTRY_TYPE_ETH_TYPE;
m_entry.keymask.u16.key = n_proto_key;
m_entry.keymask.u16.mask = n_proto_mask;
err = prestera_acl_rule_match_add(rule, &m_entry);
if (err)
return err;
/* add ip proto key,mask */
memset(&m_entry, 0, sizeof(m_entry));
m_entry.type = PRESTERA_ACL_RULE_MATCH_ENTRY_TYPE_IP_PROTO;
m_entry.keymask.u8.key = match.key->ip_proto;
m_entry.keymask.u8.mask = match.mask->ip_proto;
err = prestera_acl_rule_match_add(rule, &m_entry);
if (err)
return err;
ip_proto = match.key->ip_proto;
}
if (flow_rule_match_key(f_rule, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
struct flow_match_eth_addrs match;
flow_rule_match_eth_addrs(f_rule, &match);
/* add ethernet dst key,mask */
memset(&m_entry, 0, sizeof(m_entry));
m_entry.type = PRESTERA_ACL_RULE_MATCH_ENTRY_TYPE_ETH_DMAC;
memcpy(&m_entry.keymask.mac.key,
&match.key->dst, sizeof(match.key->dst));
memcpy(&m_entry.keymask.mac.mask,
&match.mask->dst, sizeof(match.mask->dst));
err = prestera_acl_rule_match_add(rule, &m_entry);
if (err)
return err;
/* add ethernet src key,mask */
memset(&m_entry, 0, sizeof(m_entry));
m_entry.type = PRESTERA_ACL_RULE_MATCH_ENTRY_TYPE_ETH_SMAC;
memcpy(&m_entry.keymask.mac.key,
&match.key->src, sizeof(match.key->src));
memcpy(&m_entry.keymask.mac.mask,
&match.mask->src, sizeof(match.mask->src));
err = prestera_acl_rule_match_add(rule, &m_entry);
if (err)
return err;
}
if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) {
struct flow_match_ipv4_addrs match;
flow_rule_match_ipv4_addrs(f_rule, &match);
memset(&m_entry, 0, sizeof(m_entry));
m_entry.type = PRESTERA_ACL_RULE_MATCH_ENTRY_TYPE_IP_SRC;
memcpy(&m_entry.keymask.u32.key,
&match.key->src, sizeof(match.key->src));
memcpy(&m_entry.keymask.u32.mask,
&match.mask->src, sizeof(match.mask->src));
err = prestera_acl_rule_match_add(rule, &m_entry);
if (err)
return err;
memset(&m_entry, 0, sizeof(m_entry));
m_entry.type = PRESTERA_ACL_RULE_MATCH_ENTRY_TYPE_IP_DST;
memcpy(&m_entry.keymask.u32.key,
&match.key->dst, sizeof(match.key->dst));
memcpy(&m_entry.keymask.u32.mask,
&match.mask->dst, sizeof(match.mask->dst));
err = prestera_acl_rule_match_add(rule, &m_entry);
if (err)
return err;
}
if (flow_rule_match_key(f_rule, FLOW_DISSECTOR_KEY_PORTS)) {
struct flow_match_ports match;
if (ip_proto != IPPROTO_TCP && ip_proto != IPPROTO_UDP) {
NL_SET_ERR_MSG_MOD
(f->common.extack,
"Only UDP and TCP keys are supported");
return -EINVAL;
}
flow_rule_match_ports(f_rule, &match);
memset(&m_entry, 0, sizeof(m_entry));
m_entry.type = PRESTERA_ACL_RULE_MATCH_ENTRY_TYPE_L4_PORT_SRC;
m_entry.keymask.u16.key = ntohs(match.key->src);
m_entry.keymask.u16.mask = ntohs(match.mask->src);
err = prestera_acl_rule_match_add(rule, &m_entry);
if (err)
return err;
memset(&m_entry, 0, sizeof(m_entry));
m_entry.type = PRESTERA_ACL_RULE_MATCH_ENTRY_TYPE_L4_PORT_DST;
m_entry.keymask.u16.key = ntohs(match.key->dst);
m_entry.keymask.u16.mask = ntohs(match.mask->dst);
err = prestera_acl_rule_match_add(rule, &m_entry);
if (err)
return err;
}
if (flow_rule_match_key(f_rule, FLOW_DISSECTOR_KEY_VLAN)) {
struct flow_match_vlan match;
flow_rule_match_vlan(f_rule, &match);
if (match.mask->vlan_id != 0) {
memset(&m_entry, 0, sizeof(m_entry));
m_entry.type = PRESTERA_ACL_RULE_MATCH_ENTRY_TYPE_VLAN_ID;
m_entry.keymask.u16.key = match.key->vlan_id;
m_entry.keymask.u16.mask = match.mask->vlan_id;
err = prestera_acl_rule_match_add(rule, &m_entry);
if (err)
return err;
}
memset(&m_entry, 0, sizeof(m_entry));
m_entry.type = PRESTERA_ACL_RULE_MATCH_ENTRY_TYPE_VLAN_TPID;
m_entry.keymask.u16.key = ntohs(match.key->vlan_tpid);
m_entry.keymask.u16.mask = ntohs(match.mask->vlan_tpid);
err = prestera_acl_rule_match_add(rule, &m_entry);
if (err)
return err;
}
if (flow_rule_match_key(f_rule, FLOW_DISSECTOR_KEY_ICMP)) {
struct flow_match_icmp match;
flow_rule_match_icmp(f_rule, &match);
memset(&m_entry, 0, sizeof(m_entry));
m_entry.type = PRESTERA_ACL_RULE_MATCH_ENTRY_TYPE_ICMP_TYPE;
m_entry.keymask.u8.key = match.key->type;
m_entry.keymask.u8.mask = match.mask->type;
err = prestera_acl_rule_match_add(rule, &m_entry);
if (err)
return err;
memset(&m_entry, 0, sizeof(m_entry));
m_entry.type = PRESTERA_ACL_RULE_MATCH_ENTRY_TYPE_ICMP_CODE;
m_entry.keymask.u8.key = match.key->code;
m_entry.keymask.u8.mask = match.mask->code;
err = prestera_acl_rule_match_add(rule, &m_entry);
if (err)
return err;
}
return prestera_flower_parse_actions(block, rule,
&f->rule->action,
f->common.extack);
}
int prestera_flower_replace(struct prestera_flow_block *block,
struct flow_cls_offload *f)
{
struct prestera_switch *sw = prestera_acl_block_sw(block);
struct prestera_acl_rule *rule;
int err;
rule = prestera_acl_rule_create(block, f->cookie);
if (IS_ERR(rule))
return PTR_ERR(rule);
err = prestera_flower_parse(block, rule, f);
if (err)
goto err_flower_parse;
err = prestera_acl_rule_add(sw, rule);
if (err)
goto err_rule_add;
return 0;
err_rule_add:
err_flower_parse:
prestera_acl_rule_destroy(rule);
return err;
}
void prestera_flower_destroy(struct prestera_flow_block *block,
struct flow_cls_offload *f)
{
struct prestera_acl_rule *rule;
struct prestera_switch *sw;
rule = prestera_acl_rule_lookup(prestera_acl_block_ruleset_get(block),
f->cookie);
if (rule) {
sw = prestera_acl_block_sw(block);
prestera_acl_rule_del(sw, rule);
prestera_acl_rule_destroy(rule);
}
}
int prestera_flower_stats(struct prestera_flow_block *block,
struct flow_cls_offload *f)
{
struct prestera_switch *sw = prestera_acl_block_sw(block);
struct prestera_acl_rule *rule;
u64 packets;
u64 lastuse;
u64 bytes;
int err;
rule = prestera_acl_rule_lookup(prestera_acl_block_ruleset_get(block),
f->cookie);
if (!rule)
return -EINVAL;
err = prestera_acl_rule_get_stats(sw, rule, &packets, &bytes, &lastuse);
if (err)
return err;
flow_stats_update(&f->stats, bytes, packets, 0, lastuse,
FLOW_ACTION_HW_STATS_IMMEDIATE);
return 0;
}
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