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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2010-2015 Intel Corporation
*/
#include "rte_eth_bond_private.h"
#include "rte_eth_bond_alb.h"
static inline uint8_t
simple_hash(uint8_t *hash_start, int hash_size)
{
int i;
uint8_t hash;
hash = 0;
for (i = 0; i < hash_size; ++i)
hash ^= hash_start[i];
return hash;
}
static uint16_t
calculate_slave(struct bond_dev_private *internals)
{
uint16_t idx;
idx = (internals->mode6.last_slave + 1) % internals->active_slave_count;
internals->mode6.last_slave = idx;
return internals->active_slaves[idx];
}
int
bond_mode_alb_enable(struct rte_eth_dev *bond_dev)
{
struct bond_dev_private *internals = bond_dev->data->dev_private;
struct client_data *hash_table = internals->mode6.client_table;
uint16_t data_size;
char mem_name[RTE_ETH_NAME_MAX_LEN];
int socket_id = bond_dev->data->numa_node;
/* Fill hash table with initial values */
memset(hash_table, 0, sizeof(struct client_data) * ALB_HASH_TABLE_SIZE);
rte_spinlock_init(&internals->mode6.lock);
internals->mode6.last_slave = ALB_NULL_INDEX;
internals->mode6.ntt = 0;
/* Initialize memory pool for ARP packets to send */
if (internals->mode6.mempool == NULL) {
/*
* 256 is size of ETH header, ARP header and nested VLAN headers.
* The value is chosen to be cache aligned.
*/
data_size = 256 + RTE_PKTMBUF_HEADROOM;
snprintf(mem_name, sizeof(mem_name), "%s_ALB",
bond_dev->device->name);
internals->mode6.mempool = rte_pktmbuf_pool_create(mem_name,
512 * RTE_MAX_ETHPORTS,
RTE_MEMPOOL_CACHE_MAX_SIZE >= 32 ?
32 : RTE_MEMPOOL_CACHE_MAX_SIZE,
0, data_size, socket_id);
if (internals->mode6.mempool == NULL) {
RTE_BOND_LOG(ERR, "%s: Failed to initialize ALB mempool.\n",
bond_dev->device->name);
goto mempool_alloc_error;
}
}
return 0;
mempool_alloc_error:
return -ENOMEM;
}
void bond_mode_alb_arp_recv(struct ether_hdr *eth_h, uint16_t offset,
struct bond_dev_private *internals) {
struct arp_hdr *arp;
struct client_data *hash_table = internals->mode6.client_table;
struct client_data *client_info;
uint8_t hash_index;
arp = (struct arp_hdr *) ((char *) (eth_h + 1) + offset);
/* ARP Requests are forwarded to the application with no changes */
if (arp->arp_op != rte_cpu_to_be_16(ARP_OP_REPLY))
return;
/* From now on, we analyze only ARP Reply packets */
hash_index = simple_hash((uint8_t *) &arp->arp_data.arp_sip,
sizeof(arp->arp_data.arp_sip));
client_info = &hash_table[hash_index];
/*
* We got reply for ARP Request send by the application. We need to
* update client table when received data differ from what is stored
* in ALB table and issue sending update packet to that slave.
*/
rte_spinlock_lock(&internals->mode6.lock);
if (client_info->in_use == 0 ||
client_info->app_ip != arp->arp_data.arp_tip ||
client_info->cli_ip != arp->arp_data.arp_sip ||
!is_same_ether_addr(&client_info->cli_mac, &arp->arp_data.arp_sha) ||
client_info->vlan_count != offset / sizeof(struct vlan_hdr) ||
memcmp(client_info->vlan, eth_h + 1, offset) != 0
) {
client_info->in_use = 1;
client_info->app_ip = arp->arp_data.arp_tip;
client_info->cli_ip = arp->arp_data.arp_sip;
ether_addr_copy(&arp->arp_data.arp_sha, &client_info->cli_mac);
client_info->slave_idx = calculate_slave(internals);
rte_eth_macaddr_get(client_info->slave_idx, &client_info->app_mac);
ether_addr_copy(&client_info->app_mac, &arp->arp_data.arp_tha);
memcpy(client_info->vlan, eth_h + 1, offset);
client_info->vlan_count = offset / sizeof(struct vlan_hdr);
}
internals->mode6.ntt = 1;
rte_spinlock_unlock(&internals->mode6.lock);
}
uint16_t
bond_mode_alb_arp_xmit(struct ether_hdr *eth_h, uint16_t offset,
struct bond_dev_private *internals)
{
struct arp_hdr *arp;
struct client_data *hash_table = internals->mode6.client_table;
struct client_data *client_info;
uint8_t hash_index;
struct ether_addr bonding_mac;
arp = (struct arp_hdr *)((char *)(eth_h + 1) + offset);
/*
* Traffic with src MAC other than bonding should be sent on
* current primary port.
*/
rte_eth_macaddr_get(internals->port_id, &bonding_mac);
if (!is_same_ether_addr(&bonding_mac, &arp->arp_data.arp_sha)) {
rte_eth_macaddr_get(internals->current_primary_port,
&arp->arp_data.arp_sha);
return internals->current_primary_port;
}
hash_index = simple_hash((uint8_t *)&arp->arp_data.arp_tip,
sizeof(uint32_t));
client_info = &hash_table[hash_index];
rte_spinlock_lock(&internals->mode6.lock);
if (arp->arp_op == rte_cpu_to_be_16(ARP_OP_REPLY)) {
if (client_info->in_use) {
if (client_info->app_ip == arp->arp_data.arp_sip &&
client_info->cli_ip == arp->arp_data.arp_tip) {
/* Entry is already assigned to this client */
if (!is_broadcast_ether_addr(&arp->arp_data.arp_tha)) {
ether_addr_copy(&arp->arp_data.arp_tha,
&client_info->cli_mac);
}
rte_eth_macaddr_get(client_info->slave_idx,
&client_info->app_mac);
ether_addr_copy(&client_info->app_mac, &arp->arp_data.arp_sha);
memcpy(client_info->vlan, eth_h + 1, offset);
client_info->vlan_count = offset / sizeof(struct vlan_hdr);
rte_spinlock_unlock(&internals->mode6.lock);
return client_info->slave_idx;
}
}
/* Assign new slave to this client and update src mac in ARP */
client_info->in_use = 1;
client_info->ntt = 0;
client_info->app_ip = arp->arp_data.arp_sip;
ether_addr_copy(&arp->arp_data.arp_tha, &client_info->cli_mac);
client_info->cli_ip = arp->arp_data.arp_tip;
client_info->slave_idx = calculate_slave(internals);
rte_eth_macaddr_get(client_info->slave_idx, &client_info->app_mac);
ether_addr_copy(&client_info->app_mac, &arp->arp_data.arp_sha);
memcpy(client_info->vlan, eth_h + 1, offset);
client_info->vlan_count = offset / sizeof(struct vlan_hdr);
rte_spinlock_unlock(&internals->mode6.lock);
return client_info->slave_idx;
}
/* If packet is not ARP Reply, send it on current primary port. */
rte_spinlock_unlock(&internals->mode6.lock);
rte_eth_macaddr_get(internals->current_primary_port,
&arp->arp_data.arp_sha);
return internals->current_primary_port;
}
uint16_t
bond_mode_alb_arp_upd(struct client_data *client_info,
struct rte_mbuf *pkt, struct bond_dev_private *internals)
{
struct ether_hdr *eth_h;
struct arp_hdr *arp_h;
uint16_t slave_idx;
rte_spinlock_lock(&internals->mode6.lock);
eth_h = rte_pktmbuf_mtod(pkt, struct ether_hdr *);
ether_addr_copy(&client_info->app_mac, ð_h->s_addr);
ether_addr_copy(&client_info->cli_mac, ð_h->d_addr);
if (client_info->vlan_count > 0)
eth_h->ether_type = rte_cpu_to_be_16(ETHER_TYPE_VLAN);
else
eth_h->ether_type = rte_cpu_to_be_16(ETHER_TYPE_ARP);
arp_h = (struct arp_hdr *)((char *)eth_h + sizeof(struct ether_hdr)
+ client_info->vlan_count * sizeof(struct vlan_hdr));
memcpy(eth_h + 1, client_info->vlan,
client_info->vlan_count * sizeof(struct vlan_hdr));
ether_addr_copy(&client_info->app_mac, &arp_h->arp_data.arp_sha);
arp_h->arp_data.arp_sip = client_info->app_ip;
ether_addr_copy(&client_info->cli_mac, &arp_h->arp_data.arp_tha);
arp_h->arp_data.arp_tip = client_info->cli_ip;
arp_h->arp_hrd = rte_cpu_to_be_16(ARP_HRD_ETHER);
arp_h->arp_pro = rte_cpu_to_be_16(ETHER_TYPE_IPv4);
arp_h->arp_hln = ETHER_ADDR_LEN;
arp_h->arp_pln = sizeof(uint32_t);
arp_h->arp_op = rte_cpu_to_be_16(ARP_OP_REPLY);
slave_idx = client_info->slave_idx;
rte_spinlock_unlock(&internals->mode6.lock);
return slave_idx;
}
void
bond_mode_alb_client_list_upd(struct rte_eth_dev *bond_dev)
{
struct bond_dev_private *internals = bond_dev->data->dev_private;
struct client_data *client_info;
int i;
/* If active slave count is 0, it's pointless to refresh alb table */
if (internals->active_slave_count <= 0)
return;
rte_spinlock_lock(&internals->mode6.lock);
internals->mode6.last_slave = ALB_NULL_INDEX;
for (i = 0; i < ALB_HASH_TABLE_SIZE; i++) {
client_info = &internals->mode6.client_table[i];
if (client_info->in_use) {
client_info->slave_idx = calculate_slave(internals);
rte_eth_macaddr_get(client_info->slave_idx, &client_info->app_mac);
internals->mode6.ntt = 1;
}
}
rte_spinlock_unlock(&internals->mode6.lock);
}
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