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/*
* Zebra dataplane plugin for DPDK based hw offload
*
* Copyright (C) 2021 Nvidia
* Anuradha Karuppiah
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; see the file COPYING; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifdef HAVE_CONFIG_H
#include "config.h" /* Include this explicitly */
#endif
#include "lib/libfrr.h"
#include "zebra/debug.h"
#include "zebra/interface.h"
#include "zebra/zebra_dplane.h"
#include "zebra/debug.h"
#include "zebra/zebra_pbr.h"
#include "zebra/dpdk/zebra_dplane_dpdk_private.h"
static const char *plugin_name = "zebra_dplane_dpdk";
extern struct zebra_privs_t zserv_privs;
static struct zd_dpdk_ctx dpdk_ctx_buf, *dpdk_ctx = &dpdk_ctx_buf;
#define dpdk_stat (&dpdk_ctx->stats)
void zd_dpdk_stat_show(struct vty *vty)
{
uint32_t tmp_cnt;
vty_out(vty, "%30s\n%30s\n", "Dataplane DPDK counters",
"=======================");
#define ZD_DPDK_SHOW_COUNTER(label, counter) \
do { \
tmp_cnt = \
atomic_load_explicit(&counter, memory_order_relaxed); \
vty_out(vty, "%28s: %u\n", (label), (tmp_cnt)); \
} while (0);
ZD_DPDK_SHOW_COUNTER("PBR rule adds", dpdk_stat->rule_adds);
ZD_DPDK_SHOW_COUNTER("PBR rule dels", dpdk_stat->rule_dels);
ZD_DPDK_SHOW_COUNTER("Ignored updates", dpdk_stat->ignored_updates);
}
static void zd_dpdk_rule_add(struct zebra_dplane_ctx *ctx)
{
/* XXX - place holder */
}
static void zd_dpdk_rule_del(const char *ifname, int in_ifindex,
intptr_t dp_flow_ptr)
{
/* XXX - place holder */
}
static void zd_dpdk_rule_update(struct zebra_dplane_ctx *ctx)
{
enum dplane_op_e op;
int in_ifindex;
intptr_t dp_flow_ptr;
if (IS_ZEBRA_DEBUG_DPLANE_DPDK_DETAIL) {
zlog_debug("Dplane %s", dplane_op2str(dplane_ctx_get_op(ctx)));
}
op = dplane_ctx_get_op(ctx);
switch (op) {
case DPLANE_OP_RULE_ADD:
atomic_fetch_add_explicit(&dpdk_stat->rule_adds, 1,
memory_order_relaxed);
zd_dpdk_rule_add(ctx);
break;
case DPLANE_OP_RULE_UPDATE:
/* delete old rule and install new one */
atomic_fetch_add_explicit(&dpdk_stat->rule_adds, 1,
memory_order_relaxed);
in_ifindex = dplane_ctx_get_ifindex(ctx);
dp_flow_ptr = dplane_ctx_rule_get_old_dp_flow_ptr(ctx);
zd_dpdk_rule_del(dplane_ctx_rule_get_ifname(ctx), in_ifindex,
dp_flow_ptr);
zd_dpdk_rule_add(ctx);
break;
case DPLANE_OP_RULE_DELETE:
atomic_fetch_add_explicit(&dpdk_stat->rule_dels, 1,
memory_order_relaxed);
in_ifindex = dplane_ctx_get_ifindex(ctx);
dp_flow_ptr = dplane_ctx_rule_get_dp_flow_ptr(ctx);
zd_dpdk_rule_del(dplane_ctx_rule_get_ifname(ctx), in_ifindex,
dp_flow_ptr);
break;
default:;
}
}
/* DPDK provider callback.
*/
static void zd_dpdk_process_update(struct zebra_dplane_ctx *ctx)
{
switch (dplane_ctx_get_op(ctx)) {
case DPLANE_OP_RULE_ADD:
case DPLANE_OP_RULE_UPDATE:
case DPLANE_OP_RULE_DELETE:
zd_dpdk_rule_update(ctx);
break;
default:
atomic_fetch_add_explicit(&dpdk_stat->ignored_updates, 1,
memory_order_relaxed);
break;
}
}
static int zd_dpdk_process(struct zebra_dplane_provider *prov)
{
struct zebra_dplane_ctx *ctx;
int counter, limit;
if (IS_ZEBRA_DEBUG_DPLANE_DPDK_DETAIL)
zlog_debug("processing %s", dplane_provider_get_name(prov));
limit = dplane_provider_get_work_limit(prov);
for (counter = 0; counter < limit; counter++) {
ctx = dplane_provider_dequeue_in_ctx(prov);
if (!ctx)
break;
zd_dpdk_process_update(ctx);
dplane_ctx_set_status(ctx, ZEBRA_DPLANE_REQUEST_SUCCESS);
dplane_provider_enqueue_out_ctx(prov, ctx);
}
return 0;
}
static int zd_dpdk_init(void)
{
int rc;
char *argv[] = {(char *)"/usr/lib/frr/zebra", (char *)"--"};
zd_dpdk_vty_init();
frr_with_privs (&zserv_privs) {
rc = rte_eal_init(sizeof(argv) / sizeof(argv[0]), argv);
}
if (rc < 0) {
zlog_warn("EAL init failed %s", rte_strerror(rte_errno));
return -1;
}
return 0;
}
static int zd_dpdk_start(struct zebra_dplane_provider *prov)
{
if (IS_ZEBRA_DEBUG_DPLANE_DPDK)
zlog_debug("%s start", dplane_provider_get_name(prov));
return zd_dpdk_init();
}
static int zd_dpdk_finish(struct zebra_dplane_provider *prov, bool early)
{
int rc;
if (early) {
if (IS_ZEBRA_DEBUG_DPLANE_DPDK)
zlog_debug("%s early finish",
dplane_provider_get_name(prov));
return 0;
}
if (IS_ZEBRA_DEBUG_DPLANE_DPDK)
zlog_debug("%s finish", dplane_provider_get_name(prov));
frr_with_privs (&zserv_privs) {
rc = rte_eal_cleanup();
}
if (rc < 0)
zlog_warn("EAL cleanup failed %s", rte_strerror(rte_errno));
return 0;
}
static int zd_dpdk_plugin_init(struct thread_master *tm)
{
int ret;
ret = dplane_provider_register(
plugin_name, DPLANE_PRIO_KERNEL, DPLANE_PROV_FLAGS_DEFAULT,
zd_dpdk_start, zd_dpdk_process, zd_dpdk_finish, dpdk_ctx, NULL);
if (IS_ZEBRA_DEBUG_DPLANE_DPDK)
zlog_debug("%s register status %d", plugin_name, ret);
return 0;
}
static int zd_dpdk_module_init(void)
{
hook_register(frr_late_init, zd_dpdk_plugin_init);
return 0;
}
FRR_MODULE_SETUP(.name = "dplane_dpdk", .version = "0.0.1",
.description = "Data plane plugin using dpdk for hw offload",
.init = zd_dpdk_module_init, );
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