+++ /dev/null
-/*
- * lttng-ctl-health.c
- *
- * Linux Trace Toolkit Health Control Library
- *
- * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
- * Copyright (C) 2013 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * This library is free software; you can redistribute it and/or modify it
- * under the terms of the GNU Lesser General Public License, version 2.1 only,
- * as published by the Free Software Foundation.
- *
- * This library 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#define _LGPL_SOURCE
-#include <unistd.h>
-#include <sys/types.h>
-#include <stdint.h>
-#include <limits.h>
-#include <errno.h>
-#include <string.h>
-#include <lttng/health-internal.h>
-
-#include <bin/lttng-sessiond/health-sessiond.h>
-#include <bin/lttng-consumerd/health-consumerd.h>
-#include <bin/lttng-relayd/health-relayd.h>
-#include <common/defaults.h>
-#include <common/utils.h>
-
-#include "lttng-ctl-helper.h"
-
-enum health_component {
- HEALTH_COMPONENT_SESSIOND,
- HEALTH_COMPONENT_CONSUMERD,
- HEALTH_COMPONENT_RELAYD,
-
- NR_HEALTH_COMPONENT,
-};
-
-struct lttng_health_thread {
- struct lttng_health *p;
- int state;
-};
-
-struct lttng_health {
- enum health_component component;
- uint64_t state;
- unsigned int nr_threads;
- char health_sock_path[PATH_MAX];
- /* For consumer health only */
- enum lttng_health_consumerd consumerd_type;
- struct lttng_health_thread thread[];
-};
-
-static
-const char *sessiond_thread_name[NR_HEALTH_SESSIOND_TYPES] = {
- [ HEALTH_SESSIOND_TYPE_CMD ] = "Session daemon command",
- [ HEALTH_SESSIOND_TYPE_APP_MANAGE ] = "Session daemon application manager",
- [ HEALTH_SESSIOND_TYPE_APP_REG ] = "Session daemon application registration",
- [ HEALTH_SESSIOND_TYPE_KERNEL ] = "Session daemon kernel",
- [ HEALTH_SESSIOND_TYPE_CONSUMER ] = "Session daemon consumer manager",
- [ HEALTH_SESSIOND_TYPE_HT_CLEANUP ] = "Session daemon hash table cleanup",
- [ HEALTH_SESSIOND_TYPE_APP_MANAGE_NOTIFY ] = "Session daemon application notification manager",
- [ HEALTH_SESSIOND_TYPE_APP_REG_DISPATCH ] = "Session daemon application registration dispatcher",
- [ HEALTH_SESSIOND_TYPE_ROTATION ] = "Session daemon rotation manager",
- [ HEALTH_SESSIOND_TYPE_TIMER ] = "Session daemon timer manager",
-};
-
-static
-const char *consumerd_thread_name[NR_HEALTH_CONSUMERD_TYPES] = {
- [ HEALTH_CONSUMERD_TYPE_CHANNEL ] = "Consumer daemon channel",
- [ HEALTH_CONSUMERD_TYPE_METADATA ] = "Consumer daemon metadata",
- [ HEALTH_CONSUMERD_TYPE_DATA ] = "Consumer daemon data",
- [ HEALTH_CONSUMERD_TYPE_SESSIOND ] = "Consumer daemon session daemon command manager",
- [ HEALTH_CONSUMERD_TYPE_METADATA_TIMER ] = "Consumer daemon metadata timer",
-};
-
-static
-const char *relayd_thread_name[NR_HEALTH_RELAYD_TYPES] = {
- [ HEALTH_RELAYD_TYPE_DISPATCHER ] = "Relay daemon dispatcher",
- [ HEALTH_RELAYD_TYPE_WORKER ] = "Relay daemon worker",
- [ HEALTH_RELAYD_TYPE_LISTENER ] = "Relay daemon listener",
- [ HEALTH_RELAYD_TYPE_LIVE_DISPATCHER ] = "Relay daemon live dispatcher",
- [ HEALTH_RELAYD_TYPE_LIVE_WORKER ] = "Relay daemon live worker",
- [ HEALTH_RELAYD_TYPE_LIVE_LISTENER ] = "Relay daemon live listener",
-};
-
-static
-const char **thread_name[NR_HEALTH_COMPONENT] = {
- [ HEALTH_COMPONENT_SESSIOND ] = sessiond_thread_name,
- [ HEALTH_COMPONENT_CONSUMERD] = consumerd_thread_name,
- [ HEALTH_COMPONENT_RELAYD ] = relayd_thread_name,
-};
-
-/*
- * Set health socket path.
- *
- * Returns 0 on success or -ENOMEM.
- */
-static
-int set_health_socket_path(struct lttng_health *lh,
- int tracing_group)
-{
- uid_t uid;
- const char *home;
- int ret;
- /* Global and home format strings */
- const char *global_str, *home_str;
-
- switch (lh->component) {
- case HEALTH_COMPONENT_SESSIOND:
- global_str = DEFAULT_GLOBAL_HEALTH_UNIX_SOCK;
- home_str = DEFAULT_HOME_HEALTH_UNIX_SOCK;
- break;
- case HEALTH_COMPONENT_CONSUMERD:
- switch (lh->consumerd_type) {
- case LTTNG_HEALTH_CONSUMERD_UST_32:
- global_str = DEFAULT_GLOBAL_USTCONSUMER32_HEALTH_UNIX_SOCK;
- home_str = DEFAULT_HOME_USTCONSUMER32_HEALTH_UNIX_SOCK;
- break;
- case LTTNG_HEALTH_CONSUMERD_UST_64:
- global_str = DEFAULT_GLOBAL_USTCONSUMER64_HEALTH_UNIX_SOCK;
- home_str = DEFAULT_HOME_USTCONSUMER64_HEALTH_UNIX_SOCK;
- break;
- case LTTNG_HEALTH_CONSUMERD_KERNEL:
- global_str = DEFAULT_GLOBAL_KCONSUMER_HEALTH_UNIX_SOCK;
- home_str = DEFAULT_HOME_KCONSUMER_HEALTH_UNIX_SOCK;
- break;
- default:
- return -EINVAL;
- }
- break;
- case HEALTH_COMPONENT_RELAYD:
- if (lh->health_sock_path[0] == '\0') {
- return -EINVAL;
- } else {
- return 0;
- }
- break; /* Unreached */
- default:
- return -EINVAL;
- }
-
- uid = getuid();
-
- if (uid == 0 || tracing_group) {
- lttng_ctl_copy_string(lh->health_sock_path,
- global_str,
- sizeof(lh->health_sock_path));
- return 0;
- }
-
- /*
- * With GNU C < 2.1, snprintf returns -1 if the target buffer
- * is too small; With GNU C >= 2.1, snprintf returns the
- * required size (excluding closing null).
- */
- home = utils_get_home_dir();
- if (home == NULL) {
- /* Fallback in /tmp */
- home = "/tmp";
- }
-
- ret = snprintf(lh->health_sock_path, sizeof(lh->health_sock_path),
- home_str, home);
- if ((ret < 0) || (ret >= sizeof(lh->health_sock_path))) {
- return -ENOMEM;
- }
-
- return 0;
-}
-
-static
-struct lttng_health *lttng_health_create(enum health_component hc,
- unsigned int nr_threads)
-{
- struct lttng_health *lh;
- int i;
-
- lh = zmalloc(sizeof(*lh) + sizeof(lh->thread[0]) * nr_threads);
- if (!lh) {
- return NULL;
- }
-
- lh->component = hc;
- lh->state = UINT64_MAX; /* All bits in error initially */
- lh->nr_threads = nr_threads;
- for (i = 0; i < nr_threads; i++) {
- lh->thread[i].p = lh;
- }
- return lh;
-}
-
-struct lttng_health *lttng_health_create_sessiond(void)
-{
- struct lttng_health *lh;
-
- lh = lttng_health_create(HEALTH_COMPONENT_SESSIOND,
- NR_HEALTH_SESSIOND_TYPES);
- if (!lh) {
- return NULL;
- }
- return lh;
-}
-
-struct lttng_health *
- lttng_health_create_consumerd(enum lttng_health_consumerd consumerd)
-{
- struct lttng_health *lh;
-
- lh = lttng_health_create(HEALTH_COMPONENT_CONSUMERD,
- NR_HEALTH_CONSUMERD_TYPES);
- if (!lh) {
- return NULL;
- }
- lh->consumerd_type = consumerd;
- return lh;
-}
-
-struct lttng_health *lttng_health_create_relayd(const char *path)
-{
- struct lttng_health *lh;
-
- if (!path) {
- return NULL;
- }
-
- lh = lttng_health_create(HEALTH_COMPONENT_RELAYD,
- NR_HEALTH_RELAYD_TYPES);
- if (!lh) {
- return NULL;
- }
- lttng_ctl_copy_string(lh->health_sock_path, path,
- sizeof(lh->health_sock_path));
- return lh;
-}
-
-void lttng_health_destroy(struct lttng_health *lh)
-{
- free(lh);
-}
-
-int lttng_health_query(struct lttng_health *health)
-{
- int sock, ret, i, tracing_group;
- struct health_comm_msg msg;
- struct health_comm_reply reply;
-
- if (!health) {
- return -EINVAL;
- }
-
- tracing_group = lttng_check_tracing_group();
-retry:
- ret = set_health_socket_path(health, tracing_group);
- if (ret) {
- goto error;
- }
- /* Connect to component */
- sock = lttcomm_connect_unix_sock(health->health_sock_path);
- if (sock < 0) {
- if (tracing_group) {
- /* For tracing group, fallback to per-user */
- tracing_group = 0;
- goto retry;
- }
- ret = -1;
- goto error;
- }
-
- memset(&msg, 0, sizeof(msg));
- msg.cmd = HEALTH_CMD_CHECK;
-
- ret = lttcomm_send_unix_sock(sock, (void *)&msg, sizeof(msg));
- if (ret < 0) {
- ret = -1;
- goto close_error;
- }
-
- ret = lttcomm_recv_unix_sock(sock, (void *)&reply, sizeof(reply));
- if (ret < 0) {
- ret = -1;
- goto close_error;
- }
-
- health->state = reply.ret_code;
- for (i = 0; i < health->nr_threads; i++) {
- if (health->state & (1ULL << i)) {
- health->thread[i].state = -1;
- } else {
- health->thread[i].state = 0;
- }
- }
-
-close_error:
- {
- int closeret;
-
- closeret = close(sock);
- assert(!closeret);
- }
-
-error:
- if (ret >= 0)
- ret = 0;
- return ret;
-}
-
-int lttng_health_state(const struct lttng_health *health)
-{
- if (!health) {
- return -EINVAL;
- }
-
- if (health->state == 0) {
- return 0;
- } else {
- return -1;
- }
-}
-
-int lttng_health_get_nr_threads(const struct lttng_health *health)
-{
- if (!health) {
- return -EINVAL;
- }
- return health->nr_threads;
-}
-
-const struct lttng_health_thread *
- lttng_health_get_thread(const struct lttng_health *health,
- unsigned int nth_thread)
-{
- if (!health || nth_thread >= health->nr_threads) {
- return NULL;
- }
- return &health->thread[nth_thread];
-}
-
-int lttng_health_thread_state(const struct lttng_health_thread *thread)
-{
- if (!thread) {
- return -EINVAL;
- }
- return thread->state;
-}
-
-const char *lttng_health_thread_name(const struct lttng_health_thread *thread)
-{
- unsigned int nr;
-
- if (!thread) {
- return NULL;
- }
- nr = thread - &thread->p->thread[0];
- return thread_name[thread->p->component][nr];
-}
projects / lttng-tools.git / blobdiff