--- /dev/null
+/*-
+ * collectd - src/dpdkstat.c
+ * MIT License
+ *
+ * Copyright(c) 2016 Intel Corporation. All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Authors:
+ * Maryam Tahhan <maryam.tahhan@intel.com>
+ * Harry van Haaren <harry.van.haaren@intel.com>
+ */
+
+#include "collectd.h"
+
+#include "common.h" /* auxiliary functions */
+#include "plugin.h" /* plugin_register_*, plugin_dispatch_values */
+#include "utils_time.h"
+
+#include <getopt.h>
+#include <semaphore.h>
+#include <sys/mman.h>
+#include <sys/queue.h>
+#include <poll.h>
+
+#include <rte_config.h>
+#include <rte_eal.h>
+#include <rte_ethdev.h>
+#include <rte_common.h>
+#include <rte_debug.h>
+#include <rte_malloc.h>
+#include <rte_memory.h>
+#include <rte_memzone.h>
+#include <rte_launch.h>
+#include <rte_tailq.h>
+#include <rte_lcore.h>
+#include <rte_per_lcore.h>
+#include <rte_debug.h>
+#include <rte_log.h>
+#include <rte_atomic.h>
+#include <rte_branch_prediction.h>
+#include <rte_string_fns.h>
+
+#define DPDK_DEFAULT_RTE_CONFIG "/var/run/.rte_config"
+#define DPDK_MAX_ARGC 8
+#define DPDKSTAT_MAX_BUFFER_SIZE (4096 * 4)
+#define DPDK_SHM_NAME "dpdk_collectd_stats_shm"
+#define ERR_BUF_SIZE 1024
+#define REINIT_SHM 1
+#define RESET 1
+#define NO_RESET 0
+
+enum DPDK_HELPER_ACTION {
+ DPDK_HELPER_ACTION_COUNT_STATS,
+ DPDK_HELPER_ACTION_SEND_STATS,
+};
+
+enum DPDK_HELPER_STATUS {
+ DPDK_HELPER_NOT_INITIALIZED = 0,
+ DPDK_HELPER_WAITING_ON_PRIMARY,
+ DPDK_HELPER_INITIALIZING_EAL,
+ DPDK_HELPER_ALIVE_SENDING_STATS,
+ DPDK_HELPER_GRACEFUL_QUIT,
+};
+
+struct dpdk_config_s {
+ /* General DPDK params */
+ char coremask[DATA_MAX_NAME_LEN];
+ char memory_channels[DATA_MAX_NAME_LEN];
+ char socket_memory[DATA_MAX_NAME_LEN];
+ char process_type[DATA_MAX_NAME_LEN];
+ char file_prefix[DATA_MAX_NAME_LEN];
+ cdtime_t interval;
+ uint32_t eal_initialized;
+ uint32_t enabled_port_mask;
+ char port_name[RTE_MAX_ETHPORTS][DATA_MAX_NAME_LEN];
+ uint32_t eal_argc;
+ /* Helper info */
+ int collectd_reinit_shm;
+ pid_t helper_pid;
+ sem_t sema_helper_get_stats;
+ sem_t sema_stats_in_shm;
+ int helper_pipes[2];
+ enum DPDK_HELPER_STATUS helper_status;
+ enum DPDK_HELPER_ACTION helper_action;
+ /* xstats info */
+ uint32_t num_ports;
+ uint32_t num_xstats;
+ cdtime_t port_read_time[RTE_MAX_ETHPORTS];
+ uint32_t num_stats_in_port[RTE_MAX_ETHPORTS];
+ struct rte_eth_link link_status[RTE_MAX_ETHPORTS];
+ struct rte_eth_xstats *xstats;
+ /* rte_eth_xstats from here on until the end of the SHM */
+};
+typedef struct dpdk_config_s dpdk_config_t;
+
+static int g_configured;
+static dpdk_config_t *g_configuration;
+
+static void dpdk_config_init_default(void);
+static int dpdk_config(oconfig_item_t *ci);
+static int dpdk_helper_init_eal(void);
+static int dpdk_helper_run(void);
+static int dpdk_helper_spawn(enum DPDK_HELPER_ACTION action);
+static int dpdk_init(void);
+static int dpdk_read(user_data_t *ud);
+static int dpdk_shm_cleanup(void);
+static int dpdk_shm_init(size_t size);
+
+/* Write the default configuration to the g_configuration instances */
+static void dpdk_config_init_default(void) {
+ g_configuration->interval = plugin_get_interval();
+ if (g_configuration->interval == cf_get_default_interval())
+ WARNING("dpdkstat: No time interval was configured, default value %lu ms "
+ "is set",
+ CDTIME_T_TO_MS(g_configuration->interval));
+ /* Default is all ports enabled */
+ g_configuration->enabled_port_mask = ~0;
+ g_configuration->eal_argc = DPDK_MAX_ARGC;
+ g_configuration->eal_initialized = 0;
+ ssnprintf(g_configuration->coremask, DATA_MAX_NAME_LEN, "%s", "0xf");
+ ssnprintf(g_configuration->memory_channels, DATA_MAX_NAME_LEN, "%s", "1");
+ ssnprintf(g_configuration->process_type, DATA_MAX_NAME_LEN, "%s",
+ "secondary");
+ ssnprintf(g_configuration->file_prefix, DATA_MAX_NAME_LEN, "%s",
+ DPDK_DEFAULT_RTE_CONFIG);
+
+ for (int i = 0; i < RTE_MAX_ETHPORTS; i++)
+ g_configuration->port_name[i][0] = 0;
+}
+
+static int dpdk_config(oconfig_item_t *ci) {
+ int port_counter = 0;
+ char errbuf[ERR_BUF_SIZE];
+ /* Allocate g_configuration and
+ * initialize a POSIX SHared Memory (SHM) object.
+ */
+ int err = dpdk_shm_init(sizeof(dpdk_config_t));
+ if (err) {
+ DEBUG("dpdkstat: error in shm_init, %s",
+ sstrerror(errno, errbuf, sizeof(errbuf)));
+ return -1;
+ }
+
+ /* Set defaults for config, overwritten by loop if config item exists */
+ dpdk_config_init_default();
+
+ for (int i = 0; i < ci->children_num; i++) {
+ oconfig_item_t *child = ci->children + i;
+
+ if (strcasecmp("Coremask", child->key) == 0) {
+ cf_util_get_string_buffer(child, g_configuration->coremask,
+ sizeof(g_configuration->coremask));
+ DEBUG("dpdkstat:COREMASK %s ", g_configuration->coremask);
+ } else if (strcasecmp("MemoryChannels", child->key) == 0) {
+ cf_util_get_string_buffer(child, g_configuration->memory_channels,
+ sizeof(g_configuration->memory_channels));
+ DEBUG("dpdkstat:Memory Channels %s ", g_configuration->memory_channels);
+ } else if (strcasecmp("SocketMemory", child->key) == 0) {
+ cf_util_get_string_buffer(child, g_configuration->socket_memory,
+ sizeof(g_configuration->memory_channels));
+ DEBUG("dpdkstat: socket mem %s ", g_configuration->socket_memory);
+ } else if (strcasecmp("ProcessType", child->key) == 0) {
+ cf_util_get_string_buffer(child, g_configuration->process_type,
+ sizeof(g_configuration->process_type));
+ DEBUG("dpdkstat: proc type %s ", g_configuration->process_type);
+ } else if ((strcasecmp("FilePrefix", child->key) == 0) &&
+ (child->values[0].type == OCONFIG_TYPE_STRING)) {
+ ssnprintf(g_configuration->file_prefix, DATA_MAX_NAME_LEN,
+ "/var/run/.%s_config", child->values[0].value.string);
+ DEBUG("dpdkstat: file prefix %s ", g_configuration->file_prefix);
+ } else if ((strcasecmp("EnabledPortMask", child->key) == 0) &&
+ (child->values[0].type == OCONFIG_TYPE_NUMBER)) {
+ g_configuration->enabled_port_mask =
+ (uint32_t)child->values[0].value.number;
+ DEBUG("dpdkstat: Enabled Port Mask %u",
+ g_configuration->enabled_port_mask);
+ } else if (strcasecmp("PortName", child->key) == 0) {
+ cf_util_get_string_buffer(
+ child, g_configuration->port_name[port_counter],
+ sizeof(g_configuration->port_name[port_counter]));
+ DEBUG("dpdkstat: Port %d Name: %s ", port_counter,
+ g_configuration->port_name[port_counter]);
+ port_counter++;
+ } else {
+ WARNING("dpdkstat: The config option \"%s\" is unknown.", child->key);
+ }
+ } /* End for (int i = 0; i < ci->children_num; i++)*/
+ g_configured = 1; /* Bypass configuration in dpdk_shm_init(). */
+
+ return 0;
+}
+
+/*
+ * Allocate g_configuration and initialize SHared Memory (SHM)
+ * for config and helper process
+ */
+static int dpdk_shm_init(size_t size) {
+ /*
+ * Check if SHM is already configured: when config items are provided, the
+ * config function initializes SHM. If there is no config, then init() will
+ * just return.
+ */
+ if (g_configuration)
+ return 0;
+
+ char errbuf[ERR_BUF_SIZE];
+
+ /* Create and open a new object, or open an existing object. */
+ int fd = shm_open(DPDK_SHM_NAME, O_CREAT | O_TRUNC | O_RDWR, 0666);
+ if (fd < 0) {
+ WARNING("dpdkstat:Failed to open %s as SHM:%s", DPDK_SHM_NAME,
+ sstrerror(errno, errbuf, sizeof(errbuf)));
+ goto fail;
+ }
+ /* Set the size of the shared memory object. */
+ int ret = ftruncate(fd, size);
+ if (ret != 0) {
+ WARNING("dpdkstat:Failed to resize SHM:%s",
+ sstrerror(errno, errbuf, sizeof(errbuf)));
+ goto fail_close;
+ }
+ /* Map the shared memory object into this process' virtual address space. */
+ g_configuration = mmap(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+ if (g_configuration == MAP_FAILED) {
+ WARNING("dpdkstat:Failed to mmap SHM:%s",
+ sstrerror(errno, errbuf, sizeof(errbuf)));
+ goto fail_close;
+ }
+ /*
+ * Close the file descriptor, the shared memory object still exists
+ * and can only be removed by calling shm_unlink().
+ */
+ close(fd);
+
+ /* Initialize g_configuration. */
+ memset(g_configuration, 0, size);
+
+ /* Initialize the semaphores for SHM use */
+ int err = sem_init(&g_configuration->sema_helper_get_stats, 1, 0);
+ if (err) {
+ ERROR("dpdkstat semaphore init failed: %s",
+ sstrerror(errno, errbuf, sizeof(errbuf)));
+ goto fail_close;
+ }
+ err = sem_init(&g_configuration->sema_stats_in_shm, 1, 0);
+ if (err) {
+ ERROR("dpdkstat semaphore init failed: %s",
+ sstrerror(errno, errbuf, sizeof(errbuf)));
+ goto fail_close;
+ }
+
+ g_configuration->xstats = NULL;
+
+ return 0;
+
+fail_close:
+ close(fd);
+fail:
+ /* Reset to zero, as it was set to MAP_FAILED aka: (void *)-1. Avoid
+ * an issue if collectd attempts to run this plugin failure.
+ */
+ g_configuration = 0;
+ return -1;
+}
+
+static int dpdk_re_init_shm() {
+ dpdk_config_t temp_config;
+ memcpy(&temp_config, g_configuration, sizeof(dpdk_config_t));
+ DEBUG("dpdkstat: %s: ports %" PRIu32 ", xstats %" PRIu32, __func__,
+ temp_config.num_ports, temp_config.num_xstats);
+
+ size_t shm_xstats_size =
+ sizeof(dpdk_config_t) +
+ (sizeof(struct rte_eth_xstats) * g_configuration->num_xstats);
+ DEBUG("=== SHM new size for %" PRIu32 " xstats", g_configuration->num_xstats);
+
+ int err = dpdk_shm_cleanup();
+ if (err) {
+ ERROR("dpdkstat: Error in shm_cleanup in %s", __func__);
+ return err;
+ }
+ err = dpdk_shm_init(shm_xstats_size);
+ if (err) {
+ WARNING("dpdkstat: Error in shm_init in %s", __func__);
+ return err;
+ }
+ /* If the XML config() function has been run, don't re-initialize defaults */
+ if (!g_configured)
+ dpdk_config_init_default();
+
+ memcpy(g_configuration, &temp_config, sizeof(dpdk_config_t));
+ g_configuration->collectd_reinit_shm = 0;
+ g_configuration->xstats = (struct rte_eth_xstats *)(g_configuration + 1);
+ return 0;
+}
+
+static int dpdk_init(void) {
+ int err = dpdk_shm_init(sizeof(dpdk_config_t));
+ if (err) {
+ ERROR("dpdkstat: %s : error %d in shm_init()", __func__, err);
+ return err;
+ }
+
+ /* If the XML config() function has been run, dont re-initialize defaults */
+ if (!g_configured) {
+ dpdk_config_init_default();
+ }
+
+ return 0;
+}
+
+static int dpdk_helper_stop(int reset) {
+ g_configuration->helper_status = DPDK_HELPER_GRACEFUL_QUIT;
+ if (reset) {
+ g_configuration->eal_initialized = 0;
+ g_configuration->num_ports = 0;
+ g_configuration->xstats = NULL;
+ g_configuration->num_xstats = 0;
+ for (int i = 0; i < RTE_MAX_ETHPORTS; i++)
+ g_configuration->num_stats_in_port[i] = 0;
+ }
+ close(g_configuration->helper_pipes[1]);
+ int err = kill(g_configuration->helper_pid, SIGKILL);
+ if (err) {
+ char errbuf[ERR_BUF_SIZE];
+ WARNING("dpdkstat: error sending kill to helper: %s",
+ sstrerror(errno, errbuf, sizeof(errbuf)));
+ }
+
+ return 0;
+}
+
+static int dpdk_helper_spawn(enum DPDK_HELPER_ACTION action) {
+ char errbuf[ERR_BUF_SIZE];
+ g_configuration->eal_initialized = 0;
+ g_configuration->helper_action = action;
+ /*
+ * Create a pipe for helper stdout back to collectd. This is necessary for
+ * logging EAL failures, as rte_eal_init() calls rte_panic().
+ */
+ if (pipe(g_configuration->helper_pipes) != 0) {
+ DEBUG("dpdkstat: Could not create helper pipe: %s",
+ sstrerror(errno, errbuf, sizeof(errbuf)));
+ return -1;
+ }
+
+ int pipe0_flags = fcntl(g_configuration->helper_pipes[0], F_GETFL, 0);
+ int pipe1_flags = fcntl(g_configuration->helper_pipes[1], F_GETFL, 0);
+ if (pipe0_flags == -1 || pipe1_flags == -1) {
+ WARNING("dpdkstat: Failed setting up pipe flags: %s",
+ sstrerror(errno, errbuf, sizeof(errbuf)));
+ }
+ int pipe0_err = fcntl(g_configuration->helper_pipes[0], F_SETFL,
+ pipe1_flags | O_NONBLOCK);
+ int pipe1_err = fcntl(g_configuration->helper_pipes[1], F_SETFL,
+ pipe0_flags | O_NONBLOCK);
+ if (pipe0_err == -1 || pipe1_err == -1) {
+ WARNING("dpdkstat: Failed setting up pipes: %s",
+ sstrerror(errno, errbuf, sizeof(errbuf)));
+ }
+
+ pid_t pid = fork();
+ if (pid > 0) {
+ close(g_configuration->helper_pipes[1]);
+ g_configuration->helper_pid = pid;
+ DEBUG("dpdkstat: helper pid %lu", (long)g_configuration->helper_pid);
+ /* Kick helper once its alive to have it start processing */
+ sem_post(&g_configuration->sema_helper_get_stats);
+ } else if (pid == 0) {
+ /* Replace stdout with a pipe to collectd. */
+ close(g_configuration->helper_pipes[0]);
+ close(STDOUT_FILENO);
+ dup2(g_configuration->helper_pipes[1], STDOUT_FILENO);
+ dpdk_helper_run();
+ exit(0);
+ } else {
+ ERROR("dpdkstat: Failed to fork helper process: %s",
+ sstrerror(errno, errbuf, sizeof(errbuf)));
+ return -1;
+ }
+ return 0;
+}
+
+/*
+ * Initialize the DPDK EAL, if this returns, EAL is successfully initialized.
+ * On failure, the EAL prints an error message, and the helper process exits.
+ */
+static int dpdk_helper_init_eal(void) {
+ g_configuration->helper_status = DPDK_HELPER_INITIALIZING_EAL;
+ char *argp[(g_configuration->eal_argc) + 1];
+ int i = 0;
+
+ argp[i++] = "collectd-dpdk";
+ if (strcasecmp(g_configuration->coremask, "") != 0) {
+ argp[i++] = "-c";
+ argp[i++] = g_configuration->coremask;
+ }
+ if (strcasecmp(g_configuration->memory_channels, "") != 0) {
+ argp[i++] = "-n";
+ argp[i++] = g_configuration->memory_channels;
+ }
+ if (strcasecmp(g_configuration->socket_memory, "") != 0) {
+ argp[i++] = "--socket-mem";
+ argp[i++] = g_configuration->socket_memory;
+ }
+ if (strcasecmp(g_configuration->file_prefix, "") != 0 &&
+ strcasecmp(g_configuration->file_prefix, DPDK_DEFAULT_RTE_CONFIG) != 0) {
+ argp[i++] = "--file-prefix";
+ argp[i++] = g_configuration->file_prefix;
+ }
+ if (strcasecmp(g_configuration->process_type, "") != 0) {
+ argp[i++] = "--proc-type";
+ argp[i++] = g_configuration->process_type;
+ }
+ g_configuration->eal_argc = i;
+
+ g_configuration->eal_initialized = 1;
+ int ret = rte_eal_init(g_configuration->eal_argc, argp);
+ if (ret < 0) {
+ g_configuration->eal_initialized = 0;
+ return ret;
+ }
+ return 0;
+}
+
+static int dpdk_helper_run(void) {
+ char errbuf[ERR_BUF_SIZE];
+ pid_t ppid = getppid();
+ g_configuration->helper_status = DPDK_HELPER_WAITING_ON_PRIMARY;
+
+ while (1) {
+ /* sem_timedwait() to avoid blocking forever */
+ struct timespec ts;
+ cdtime_t now = cdtime();
+ cdtime_t safety_period = MS_TO_CDTIME_T(1500);
+ CDTIME_T_TO_TIMESPEC(now + safety_period + g_configuration->interval * 2,
+ &ts);
+ int ret = sem_timedwait(&g_configuration->sema_helper_get_stats, &ts);
+
+ if (ret == -1 && errno == ETIMEDOUT) {
+ ERROR("dpdkstat-helper: sem timedwait()"
+ " timeout, did collectd terminate?");
+ dpdk_helper_stop(RESET);
+ }
+ /* Parent PID change means collectd died so quit the helper process. */
+ if (ppid != getppid()) {
+ WARNING("dpdkstat-helper: parent PID changed, quitting.");
+ dpdk_helper_stop(RESET);
+ }
+
+ /* Checking for DPDK primary process. */
+ if (!rte_eal_primary_proc_alive(g_configuration->file_prefix)) {
+ if (g_configuration->eal_initialized) {
+ WARNING("dpdkstat-helper: no primary alive but EAL initialized:"
+ " quitting.");
+ dpdk_helper_stop(RESET);
+ }
+ g_configuration->helper_status = DPDK_HELPER_WAITING_ON_PRIMARY;
+ /* Back to start of while() - waiting for primary process */
+ continue;
+ }
+
+ if (!g_configuration->eal_initialized) {
+ /* Initialize EAL. */
+ int ret = dpdk_helper_init_eal();
+ if (ret != 0) {
+ WARNING("ERROR INITIALIZING EAL");
+ dpdk_helper_stop(RESET);
+ }
+ }
+
+ g_configuration->helper_status = DPDK_HELPER_ALIVE_SENDING_STATS;
+
+ uint8_t nb_ports = rte_eth_dev_count();
+ if (nb_ports == 0) {
+ DEBUG("dpdkstat-helper: No DPDK ports available. "
+ "Check bound devices to DPDK driver.");
+ dpdk_helper_stop(RESET);
+ }
+
+ if (nb_ports > RTE_MAX_ETHPORTS)
+ nb_ports = RTE_MAX_ETHPORTS;
+
+ int len = 0, enabled_port_count = 0, num_xstats = 0;
+ for (uint8_t i = 0; i < nb_ports; i++) {
+ if (!(g_configuration->enabled_port_mask & (1 << i)))
+ continue;
+
+ if (g_configuration->helper_action == DPDK_HELPER_ACTION_COUNT_STATS) {
+ len = rte_eth_xstats_get(i, NULL, 0);
+ if (len < 0) {
+ ERROR("dpdkstat-helper: Cannot get xstats count on port %" PRIu8, i);
+ break;
+ }
+ num_xstats += len;
+ g_configuration->num_stats_in_port[enabled_port_count] = len;
+ enabled_port_count++;
+ continue;
+ } else {
+ len = g_configuration->num_stats_in_port[enabled_port_count];
+ g_configuration->port_read_time[enabled_port_count] = cdtime();
+ ret = rte_eth_xstats_get(
+ i, g_configuration->xstats + num_xstats,
+ g_configuration->num_stats_in_port[enabled_port_count]);
+ if (ret < 0 || ret != len) {
+ DEBUG("dpdkstat-helper: Error reading xstats on port %" PRIu8
+ " len = %d",
+ i, len);
+ break;
+ }
+ num_xstats += g_configuration->num_stats_in_port[enabled_port_count];
+ enabled_port_count++;
+ }
+ } /* for (nb_ports) */
+
+ if (g_configuration->helper_action == DPDK_HELPER_ACTION_COUNT_STATS) {
+ g_configuration->num_ports = enabled_port_count;
+ g_configuration->num_xstats = num_xstats;
+ DEBUG("dpdkstat-helper ports: %" PRIu32 ", num stats: %" PRIu32,
+ g_configuration->num_ports, g_configuration->num_xstats);
+ /* Exit, allowing collectd to re-init SHM to the right size */
+ g_configuration->collectd_reinit_shm = REINIT_SHM;
+ dpdk_helper_stop(NO_RESET);
+ }
+ /* Now kick collectd send thread to send the stats */
+ int err = sem_post(&g_configuration->sema_stats_in_shm);
+ if (err) {
+ WARNING("dpdkstat: error posting semaphore to helper %s",
+ sstrerror(errno, errbuf, sizeof(errbuf)));
+ dpdk_helper_stop(RESET);
+ }
+ } /* while(1) */
+
+ return 0;
+}
+
+static void dpdk_submit_xstats(const char *dev_name,
+ const struct rte_eth_xstats *xstats,
+ uint32_t counters, cdtime_t port_read_time) {
+ for (uint32_t j = 0; j < counters; j++) {
+ value_list_t dpdkstat_vl = VALUE_LIST_INIT;
+ char *type_end;
+
+ dpdkstat_vl.values = &(value_t){.derive = (derive_t)xstats[j].value};
+ dpdkstat_vl.values_len = 1; /* Submit stats one at a time */
+ dpdkstat_vl.time = port_read_time;
+ sstrncpy(dpdkstat_vl.host, hostname_g, sizeof(dpdkstat_vl.host));
+ sstrncpy(dpdkstat_vl.plugin, "dpdkstat", sizeof(dpdkstat_vl.plugin));
+ sstrncpy(dpdkstat_vl.plugin_instance, dev_name,
+ sizeof(dpdkstat_vl.plugin_instance));
+
+ type_end = strrchr(xstats[j].name, '_');
+
+ if ((type_end != NULL) &&
+ (strncmp(xstats[j].name, "rx_", strlen("rx_")) == 0)) {
+ if (strncmp(type_end, "_errors", strlen("_errors")) == 0) {
+ sstrncpy(dpdkstat_vl.type, "if_rx_errors", sizeof(dpdkstat_vl.type));
+ } else if (strncmp(type_end, "_dropped", strlen("_dropped")) == 0) {
+ sstrncpy(dpdkstat_vl.type, "if_rx_dropped", sizeof(dpdkstat_vl.type));
+ } else if (strncmp(type_end, "_bytes", strlen("_bytes")) == 0) {
+ sstrncpy(dpdkstat_vl.type, "if_rx_octets", sizeof(dpdkstat_vl.type));
+ } else if (strncmp(type_end, "_packets", strlen("_packets")) == 0) {
+ sstrncpy(dpdkstat_vl.type, "if_rx_packets", sizeof(dpdkstat_vl.type));
+ } else if (strncmp(type_end, "_placement", strlen("_placement")) == 0) {
+ sstrncpy(dpdkstat_vl.type, "if_rx_errors", sizeof(dpdkstat_vl.type));
+ } else if (strncmp(type_end, "_buff", strlen("_buff")) == 0) {
+ sstrncpy(dpdkstat_vl.type, "if_rx_errors", sizeof(dpdkstat_vl.type));
+ } else {
+ /* Does not fit obvious type: use a more generic one */
+ sstrncpy(dpdkstat_vl.type, "derive", sizeof(dpdkstat_vl.type));
+ }
+
+ } else if ((type_end != NULL) &&
+ (strncmp(xstats[j].name, "tx_", strlen("tx_"))) == 0) {
+ if (strncmp(type_end, "_errors", strlen("_errors")) == 0) {
+ sstrncpy(dpdkstat_vl.type, "if_tx_errors", sizeof(dpdkstat_vl.type));
+ } else if (strncmp(type_end, "_dropped", strlen("_dropped")) == 0) {
+ sstrncpy(dpdkstat_vl.type, "if_tx_dropped", sizeof(dpdkstat_vl.type));
+ } else if (strncmp(type_end, "_bytes", strlen("_bytes")) == 0) {
+ sstrncpy(dpdkstat_vl.type, "if_tx_octets", sizeof(dpdkstat_vl.type));
+ } else if (strncmp(type_end, "_packets", strlen("_packets")) == 0) {
+ sstrncpy(dpdkstat_vl.type, "if_tx_packets", sizeof(dpdkstat_vl.type));
+ } else {
+ /* Does not fit obvious type: use a more generic one */
+ sstrncpy(dpdkstat_vl.type, "derive", sizeof(dpdkstat_vl.type));
+ }
+ } else if ((type_end != NULL) &&
+ (strncmp(xstats[j].name, "flow_", strlen("flow_"))) == 0) {
+
+ if (strncmp(type_end, "_filters", strlen("_filters")) == 0) {
+ sstrncpy(dpdkstat_vl.type, "operations", sizeof(dpdkstat_vl.type));
+ } else if (strncmp(type_end, "_errors", strlen("_errors")) == 0) {
+ sstrncpy(dpdkstat_vl.type, "errors", sizeof(dpdkstat_vl.type));
+ } else if (strncmp(type_end, "_filters", strlen("_filters")) == 0) {
+ sstrncpy(dpdkstat_vl.type, "filter_result", sizeof(dpdkstat_vl.type));
+ }
+ } else if ((type_end != NULL) &&
+ (strncmp(xstats[j].name, "mac_", strlen("mac_"))) == 0) {
+ if (strncmp(type_end, "_errors", strlen("_errors")) == 0) {
+ sstrncpy(dpdkstat_vl.type, "errors", sizeof(dpdkstat_vl.type));
+ }
+ } else {
+ /* Does not fit obvious type, or strrchr error:
+ * use a more generic type */
+ sstrncpy(dpdkstat_vl.type, "derive", sizeof(dpdkstat_vl.type));
+ }
+
+ sstrncpy(dpdkstat_vl.type_instance, xstats[j].name,
+ sizeof(dpdkstat_vl.type_instance));
+ plugin_dispatch_values(&dpdkstat_vl);
+ }
+}
+
+static int dpdk_read(user_data_t *ud) {
+ int ret = 0;
+
+ /*
+ * Check if SHM flag is set to be re-initialized. AKA DPDK ports have been
+ * counted, so re-init SHM to be large enough to fit all the statistics.
+ */
+ if (g_configuration->collectd_reinit_shm) {
+ DEBUG("dpdkstat: read() now reinit SHM then launching send-thread");
+ dpdk_re_init_shm();
+ }
+
+ /*
+ * Check if DPDK proc is alive, and has already counted port / stats. This
+ * must be done in dpdk_read(), because the DPDK primary process may not be
+ * alive at dpdk_init() time.
+ */
+ if (g_configuration->helper_status == DPDK_HELPER_NOT_INITIALIZED ||
+ g_configuration->helper_status == DPDK_HELPER_GRACEFUL_QUIT) {
+ int action = DPDK_HELPER_ACTION_SEND_STATS;
+ if (g_configuration->num_xstats == 0)
+ action = DPDK_HELPER_ACTION_COUNT_STATS;
+ /* Spawn the helper thread to count stats or to read stats. */
+ int err = dpdk_helper_spawn(action);
+ if (err) {
+ char errbuf[ERR_BUF_SIZE];
+ ERROR("dpdkstat: error spawning helper %s",
+ sstrerror(errno, errbuf, sizeof(errbuf)));
+ return -1;
+ }
+ }
+
+ pid_t ws = waitpid(g_configuration->helper_pid, NULL, WNOHANG);
+ /*
+ * Conditions under which to respawn helper:
+ * waitpid() fails, helper process died (or quit), so respawn
+ */
+ _Bool respawn_helper = 0;
+ if (ws != 0) {
+ respawn_helper = 1;
+ }
+
+ char buf[DPDKSTAT_MAX_BUFFER_SIZE];
+ char out[DPDKSTAT_MAX_BUFFER_SIZE];
+
+ /* non blocking check on helper logging pipe */
+ struct pollfd fds = {
+ .fd = g_configuration->helper_pipes[0], .events = POLLIN,
+ };
+ int data_avail = poll(&fds, 1, 0);
+ if (data_avail < 0) {
+ char errbuf[ERR_BUF_SIZE];
+ if (errno != EINTR || errno != EAGAIN)
+ ERROR("dpdkstats: poll(2) failed: %s",
+ sstrerror(errno, errbuf, sizeof(errbuf)));
+ }
+ while (data_avail) {
+ int nbytes = read(g_configuration->helper_pipes[0], buf, sizeof(buf));
+ if (nbytes <= 0)
+ break;
+ ssnprintf(out, nbytes, "%s", buf);
+ DEBUG("dpdkstat: helper-proc: %s", out);
+ }
+
+ if (respawn_helper) {
+ if (g_configuration->helper_pid)
+ dpdk_helper_stop(RESET);
+ dpdk_helper_spawn(DPDK_HELPER_ACTION_COUNT_STATS);
+ }
+
+ /* Kick helper process through SHM */
+ sem_post(&g_configuration->sema_helper_get_stats);
+
+ struct timespec ts;
+ cdtime_t now = cdtime();
+ CDTIME_T_TO_TIMESPEC(now + g_configuration->interval, &ts);
+ ret = sem_timedwait(&g_configuration->sema_stats_in_shm, &ts);
+ if (ret == -1) {
+ if (errno == ETIMEDOUT)
+ DEBUG(
+ "dpdkstat: timeout in collectd thread: is a DPDK Primary running? ");
+ return 0;
+ }
+
+ /* Dispatch the stats.*/
+ uint32_t count = 0, port_num = 0;
+
+ for (uint32_t i = 0; i < g_configuration->num_ports; i++) {
+ char dev_name[64];
+ cdtime_t port_read_time = g_configuration->port_read_time[i];
+ uint32_t counters_num = g_configuration->num_stats_in_port[i];
+ size_t ports_max = CHAR_BIT * sizeof(g_configuration->enabled_port_mask);
+ for (size_t j = port_num; j < ports_max; j++) {
+ if ((g_configuration->enabled_port_mask & (1 << j)) != 0)
+ break;
+ port_num++;
+ }
+
+ if (g_configuration->port_name[i][0] != 0)
+ ssnprintf(dev_name, sizeof(dev_name), "%s",
+ g_configuration->port_name[i]);
+ else
+ ssnprintf(dev_name, sizeof(dev_name), "port.%" PRIu32, port_num);
+ struct rte_eth_xstats *xstats = g_configuration->xstats + count;
+
+ dpdk_submit_xstats(dev_name, xstats, counters_num, port_read_time);
+ count += counters_num;
+ port_num++;
+ } /* for each port */
+ return 0;
+}
+
+static int dpdk_shm_cleanup(void) {
+ int ret = munmap(g_configuration, sizeof(dpdk_config_t));
+ g_configuration = 0;
+ if (ret) {
+ ERROR("dpdkstat: munmap returned %d", ret);
+ return ret;
+ }
+ ret = shm_unlink(DPDK_SHM_NAME);
+ if (ret) {
+ ERROR("dpdkstat: shm_unlink returned %d", ret);
+ return ret;
+ }
+ return 0;
+}
+
+static int dpdk_shutdown(void) {
+ int ret = 0;
+ char errbuf[ERR_BUF_SIZE];
+ close(g_configuration->helper_pipes[1]);
+ int err = kill(g_configuration->helper_pid, SIGKILL);
+ if (err) {
+ ERROR("dpdkstat: error sending sigkill to helper %s",
+ sstrerror(errno, errbuf, sizeof(errbuf)));
+ ret = -1;
+ }
+ err = dpdk_shm_cleanup();
+ if (err) {
+ ERROR("dpdkstat: error cleaning up SHM: %s",
+ sstrerror(errno, errbuf, sizeof(errbuf)));
+ ret = -1;
+ }
+
+ return ret;
+}
+
+void module_register(void) {
+ plugin_register_complex_config("dpdkstat", dpdk_config);
+ plugin_register_init("dpdkstat", dpdk_init);
+ plugin_register_complex_read(NULL, "dpdkstat", dpdk_read, 0, NULL);
+ plugin_register_shutdown("dpdkstat", dpdk_shutdown);
+}
projects / collectd.git / commitdiff