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|
// SPDX-License-Identifier: GPL-2.0+
/* Microchip VCAP TC
*
* Copyright (c) 2023 Microchip Technology Inc. and its subsidiaries.
*/
#include <net/flow_offload.h>
#include <net/ipv6.h>
#include <net/tcp.h>
#include "vcap_api_client.h"
#include "vcap_tc.h"
enum vcap_is2_arp_opcode {
VCAP_IS2_ARP_REQUEST,
VCAP_IS2_ARP_REPLY,
VCAP_IS2_RARP_REQUEST,
VCAP_IS2_RARP_REPLY,
};
enum vcap_arp_opcode {
VCAP_ARP_OP_RESERVED,
VCAP_ARP_OP_REQUEST,
VCAP_ARP_OP_REPLY,
};
int vcap_tc_flower_handler_ethaddr_usage(struct vcap_tc_flower_parse_usage *st)
{
enum vcap_key_field smac_key = VCAP_KF_L2_SMAC;
enum vcap_key_field dmac_key = VCAP_KF_L2_DMAC;
struct flow_match_eth_addrs match;
struct vcap_u48_key smac, dmac;
int err = 0;
flow_rule_match_eth_addrs(st->frule, &match);
if (!is_zero_ether_addr(match.mask->src)) {
vcap_netbytes_copy(smac.value, match.key->src, ETH_ALEN);
vcap_netbytes_copy(smac.mask, match.mask->src, ETH_ALEN);
err = vcap_rule_add_key_u48(st->vrule, smac_key, &smac);
if (err)
goto out;
}
if (!is_zero_ether_addr(match.mask->dst)) {
vcap_netbytes_copy(dmac.value, match.key->dst, ETH_ALEN);
vcap_netbytes_copy(dmac.mask, match.mask->dst, ETH_ALEN);
err = vcap_rule_add_key_u48(st->vrule, dmac_key, &dmac);
if (err)
goto out;
}
st->used_keys |= BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS);
return err;
out:
NL_SET_ERR_MSG_MOD(st->fco->common.extack, "eth_addr parse error");
return err;
}
EXPORT_SYMBOL_GPL(vcap_tc_flower_handler_ethaddr_usage);
int vcap_tc_flower_handler_ipv4_usage(struct vcap_tc_flower_parse_usage *st)
{
int err = 0;
if (st->l3_proto == ETH_P_IP) {
struct flow_match_ipv4_addrs mt;
flow_rule_match_ipv4_addrs(st->frule, &mt);
if (mt.mask->src) {
err = vcap_rule_add_key_u32(st->vrule,
VCAP_KF_L3_IP4_SIP,
be32_to_cpu(mt.key->src),
be32_to_cpu(mt.mask->src));
if (err)
goto out;
}
if (mt.mask->dst) {
err = vcap_rule_add_key_u32(st->vrule,
VCAP_KF_L3_IP4_DIP,
be32_to_cpu(mt.key->dst),
be32_to_cpu(mt.mask->dst));
if (err)
goto out;
}
}
st->used_keys |= BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS);
return err;
out:
NL_SET_ERR_MSG_MOD(st->fco->common.extack, "ipv4_addr parse error");
return err;
}
EXPORT_SYMBOL_GPL(vcap_tc_flower_handler_ipv4_usage);
int vcap_tc_flower_handler_ipv6_usage(struct vcap_tc_flower_parse_usage *st)
{
int err = 0;
if (st->l3_proto == ETH_P_IPV6) {
struct flow_match_ipv6_addrs mt;
struct vcap_u128_key sip;
struct vcap_u128_key dip;
flow_rule_match_ipv6_addrs(st->frule, &mt);
/* Check if address masks are non-zero */
if (!ipv6_addr_any(&mt.mask->src)) {
vcap_netbytes_copy(sip.value, mt.key->src.s6_addr, 16);
vcap_netbytes_copy(sip.mask, mt.mask->src.s6_addr, 16);
err = vcap_rule_add_key_u128(st->vrule,
VCAP_KF_L3_IP6_SIP, &sip);
if (err)
goto out;
}
if (!ipv6_addr_any(&mt.mask->dst)) {
vcap_netbytes_copy(dip.value, mt.key->dst.s6_addr, 16);
vcap_netbytes_copy(dip.mask, mt.mask->dst.s6_addr, 16);
err = vcap_rule_add_key_u128(st->vrule,
VCAP_KF_L3_IP6_DIP, &dip);
if (err)
goto out;
}
}
st->used_keys |= BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS);
return err;
out:
NL_SET_ERR_MSG_MOD(st->fco->common.extack, "ipv6_addr parse error");
return err;
}
EXPORT_SYMBOL_GPL(vcap_tc_flower_handler_ipv6_usage);
int vcap_tc_flower_handler_portnum_usage(struct vcap_tc_flower_parse_usage *st)
{
struct flow_match_ports mt;
u16 value, mask;
int err = 0;
flow_rule_match_ports(st->frule, &mt);
if (mt.mask->src) {
value = be16_to_cpu(mt.key->src);
mask = be16_to_cpu(mt.mask->src);
err = vcap_rule_add_key_u32(st->vrule, VCAP_KF_L4_SPORT, value,
mask);
if (err)
goto out;
}
if (mt.mask->dst) {
value = be16_to_cpu(mt.key->dst);
mask = be16_to_cpu(mt.mask->dst);
err = vcap_rule_add_key_u32(st->vrule, VCAP_KF_L4_DPORT, value,
mask);
if (err)
goto out;
}
st->used_keys |= BIT(FLOW_DISSECTOR_KEY_PORTS);
return err;
out:
NL_SET_ERR_MSG_MOD(st->fco->common.extack, "port parse error");
return err;
}
EXPORT_SYMBOL_GPL(vcap_tc_flower_handler_portnum_usage);
int vcap_tc_flower_handler_cvlan_usage(struct vcap_tc_flower_parse_usage *st)
{
enum vcap_key_field vid_key = VCAP_KF_8021Q_VID0;
enum vcap_key_field pcp_key = VCAP_KF_8021Q_PCP0;
struct flow_match_vlan mt;
u16 tpid;
int err;
flow_rule_match_cvlan(st->frule, &mt);
tpid = be16_to_cpu(mt.key->vlan_tpid);
if (tpid == ETH_P_8021Q) {
vid_key = VCAP_KF_8021Q_VID1;
pcp_key = VCAP_KF_8021Q_PCP1;
}
if (mt.mask->vlan_id) {
err = vcap_rule_add_key_u32(st->vrule, vid_key,
mt.key->vlan_id,
mt.mask->vlan_id);
if (err)
goto out;
}
if (mt.mask->vlan_priority) {
err = vcap_rule_add_key_u32(st->vrule, pcp_key,
mt.key->vlan_priority,
mt.mask->vlan_priority);
if (err)
goto out;
}
st->used_keys |= BIT(FLOW_DISSECTOR_KEY_CVLAN);
return 0;
out:
NL_SET_ERR_MSG_MOD(st->fco->common.extack, "cvlan parse error");
return err;
}
EXPORT_SYMBOL_GPL(vcap_tc_flower_handler_cvlan_usage);
int vcap_tc_flower_handler_vlan_usage(struct vcap_tc_flower_parse_usage *st,
enum vcap_key_field vid_key,
enum vcap_key_field pcp_key)
{
struct flow_match_vlan mt;
int err;
flow_rule_match_vlan(st->frule, &mt);
if (mt.mask->vlan_id) {
err = vcap_rule_add_key_u32(st->vrule, vid_key,
mt.key->vlan_id,
mt.mask->vlan_id);
if (err)
goto out;
}
if (mt.mask->vlan_priority) {
err = vcap_rule_add_key_u32(st->vrule, pcp_key,
mt.key->vlan_priority,
mt.mask->vlan_priority);
if (err)
goto out;
}
if (mt.mask->vlan_tpid)
st->tpid = be16_to_cpu(mt.key->vlan_tpid);
st->used_keys |= BIT(FLOW_DISSECTOR_KEY_VLAN);
return 0;
out:
NL_SET_ERR_MSG_MOD(st->fco->common.extack, "vlan parse error");
return err;
}
EXPORT_SYMBOL_GPL(vcap_tc_flower_handler_vlan_usage);
int vcap_tc_flower_handler_tcp_usage(struct vcap_tc_flower_parse_usage *st)
{
struct flow_match_tcp mt;
u16 tcp_flags_mask;
u16 tcp_flags_key;
enum vcap_bit val;
int err = 0;
flow_rule_match_tcp(st->frule, &mt);
tcp_flags_key = be16_to_cpu(mt.key->flags);
tcp_flags_mask = be16_to_cpu(mt.mask->flags);
if (tcp_flags_mask & TCPHDR_FIN) {
val = VCAP_BIT_0;
if (tcp_flags_key & TCPHDR_FIN)
val = VCAP_BIT_1;
err = vcap_rule_add_key_bit(st->vrule, VCAP_KF_L4_FIN, val);
if (err)
goto out;
}
if (tcp_flags_mask & TCPHDR_SYN) {
val = VCAP_BIT_0;
if (tcp_flags_key & TCPHDR_SYN)
val = VCAP_BIT_1;
err = vcap_rule_add_key_bit(st->vrule, VCAP_KF_L4_SYN, val);
if (err)
goto out;
}
if (tcp_flags_mask & TCPHDR_RST) {
val = VCAP_BIT_0;
if (tcp_flags_key & TCPHDR_RST)
val = VCAP_BIT_1;
err = vcap_rule_add_key_bit(st->vrule, VCAP_KF_L4_RST, val);
if (err)
goto out;
}
if (tcp_flags_mask & TCPHDR_PSH) {
val = VCAP_BIT_0;
if (tcp_flags_key & TCPHDR_PSH)
val = VCAP_BIT_1;
err = vcap_rule_add_key_bit(st->vrule, VCAP_KF_L4_PSH, val);
if (err)
goto out;
}
if (tcp_flags_mask & TCPHDR_ACK) {
val = VCAP_BIT_0;
if (tcp_flags_key & TCPHDR_ACK)
val = VCAP_BIT_1;
err = vcap_rule_add_key_bit(st->vrule, VCAP_KF_L4_ACK, val);
if (err)
goto out;
}
if (tcp_flags_mask & TCPHDR_URG) {
val = VCAP_BIT_0;
if (tcp_flags_key & TCPHDR_URG)
val = VCAP_BIT_1;
err = vcap_rule_add_key_bit(st->vrule, VCAP_KF_L4_URG, val);
if (err)
goto out;
}
st->used_keys |= BIT(FLOW_DISSECTOR_KEY_TCP);
return err;
out:
NL_SET_ERR_MSG_MOD(st->fco->common.extack, "tcp_flags parse error");
return err;
}
EXPORT_SYMBOL_GPL(vcap_tc_flower_handler_tcp_usage);
int vcap_tc_flower_handler_arp_usage(struct vcap_tc_flower_parse_usage *st)
{
struct flow_match_arp mt;
u16 value, mask;
u32 ipval, ipmsk;
int err;
flow_rule_match_arp(st->frule, &mt);
if (mt.mask->op) {
mask = 0x3;
if (st->l3_proto == ETH_P_ARP) {
value = mt.key->op == VCAP_ARP_OP_REQUEST ?
VCAP_IS2_ARP_REQUEST :
VCAP_IS2_ARP_REPLY;
} else { /* RARP */
value = mt.key->op == VCAP_ARP_OP_REQUEST ?
VCAP_IS2_RARP_REQUEST :
VCAP_IS2_RARP_REPLY;
}
err = vcap_rule_add_key_u32(st->vrule, VCAP_KF_ARP_OPCODE,
value, mask);
if (err)
goto out;
}
/* The IS2 ARP keyset does not support ARP hardware addresses */
if (!is_zero_ether_addr(mt.mask->sha) ||
!is_zero_ether_addr(mt.mask->tha)) {
err = -EINVAL;
goto out;
}
if (mt.mask->sip) {
ipval = be32_to_cpu((__force __be32)mt.key->sip);
ipmsk = be32_to_cpu((__force __be32)mt.mask->sip);
err = vcap_rule_add_key_u32(st->vrule, VCAP_KF_L3_IP4_SIP,
ipval, ipmsk);
if (err)
goto out;
}
if (mt.mask->tip) {
ipval = be32_to_cpu((__force __be32)mt.key->tip);
ipmsk = be32_to_cpu((__force __be32)mt.mask->tip);
err = vcap_rule_add_key_u32(st->vrule, VCAP_KF_L3_IP4_DIP,
ipval, ipmsk);
if (err)
goto out;
}
st->used_keys |= BIT(FLOW_DISSECTOR_KEY_ARP);
return 0;
out:
NL_SET_ERR_MSG_MOD(st->fco->common.extack, "arp parse error");
return err;
}
EXPORT_SYMBOL_GPL(vcap_tc_flower_handler_arp_usage);
int vcap_tc_flower_handler_ip_usage(struct vcap_tc_flower_parse_usage *st)
{
struct flow_match_ip mt;
int err = 0;
flow_rule_match_ip(st->frule, &mt);
if (mt.mask->tos) {
err = vcap_rule_add_key_u32(st->vrule, VCAP_KF_L3_TOS,
mt.key->tos,
mt.mask->tos);
if (err)
goto out;
}
st->used_keys |= BIT(FLOW_DISSECTOR_KEY_IP);
return err;
out:
NL_SET_ERR_MSG_MOD(st->fco->common.extack, "ip_tos parse error");
return err;
}
EXPORT_SYMBOL_GPL(vcap_tc_flower_handler_ip_usage);
|
