static int dpdk_stats_read(user_data_t *ud) {
DPDK_STATS_TRACE();
int ret = 0;
if (g_hc == NULL) {
ERROR("dpdk stats plugin not initialized");
return -EINVAL;
}
dpdk_stats_ctx_t *ctx = DPDK_STATS_CTX_GET(g_hc);
int result = 0;
ret = dpdk_helper_command(g_hc, DPDK_CMD_GET_STATS, &result,
ctx->config.interval);
if (ret != 0) {
return 0;
}
if (result == -ENOBUFS) {
dpdk_stats_reinit_helper();
} else if (result == -ENODEV) {
dpdk_helper_shutdown(g_hc);
} else if (result == 0) {
dpdk_stats_counters_dispatch(g_hc);
}
return 0;
}
static int dpdk_stats_shutdown(void) {
DPDK_STATS_TRACE();
dpdk_helper_shutdown(g_hc);
g_hc = NULL;
return 0;
}
static int dpdk_stats_shutdown(void) {
DPDK_STATS_TRACE();
int ret = 0;
ret = dpdk_helper_shutdown(g_hc);
g_hc = NULL;
if (ret != 0) {
ERROR("%s: failed to cleanup %s helper", DPDK_STATS_PLUGIN, g_shm_name);
return ret;
}
return ret;
}
static int dpdk_stats_reinit_helper() {
DPDK_STATS_TRACE();
dpdk_stats_ctx_t *ctx = DPDK_STATS_CTX_GET(g_hc);
size_t data_size = sizeof(dpdk_stats_ctx_t) +
(ctx->stats_count * DPDK_STATS_CTX_GET_XSTAT_SIZE);
DEBUG("%s:%d helper reinit (new_size=%zu)", __FUNCTION__, __LINE__,
data_size);
dpdk_stats_ctx_t tmp_ctx;
dpdk_eal_config_t tmp_eal;
memcpy(&tmp_ctx, ctx, sizeof(dpdk_stats_ctx_t));
dpdk_helper_eal_config_get(g_hc, &tmp_eal);
dpdk_helper_shutdown(g_hc);
g_hc = NULL;
int ret;
ret = dpdk_helper_init(g_shm_name, data_size, &g_hc);
if (ret != 0) {
char errbuf[ERR_BUF_SIZE];
ERROR("%s: failed to initialize %s helper(error: %s)", DPDK_STATS_PLUGIN,
g_shm_name, sstrerror(errno, errbuf, sizeof(errbuf)));
return ret;
}
ctx = DPDK_STATS_CTX_GET(g_hc);
memcpy(ctx, &tmp_ctx, sizeof(dpdk_stats_ctx_t));
DPDK_STATS_CTX_INIT(ctx);
dpdk_helper_eal_config_set(g_hc, &tmp_eal);
return ret;
}
