lttnglibexec_PROGRAMS = lttng-consumerd
-lttng_consumerd_SOURCES = lttng-consumerd.c \
+lttng_consumerd_SOURCES = \
+ lttng-consumerd.cpp \
lttng-consumerd.h \
- health-consumerd.h \
- health-consumerd.c
+ health-consumerd.cpp \
+ health-consumerd.h
lttng_consumerd_LDADD = \
$(top_builddir)/src/common/consumer/libconsumer.la \
+++ /dev/null
-/*
- * Copyright (C) 2013 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * SPDX-License-Identifier: GPL-2.0-only
- *
- */
-
-#define _LGPL_SOURCE
-#include <fcntl.h>
-#include <getopt.h>
-#include <grp.h>
-#include <limits.h>
-#include <pthread.h>
-#include <signal.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/ipc.h>
-#include <sys/resource.h>
-#include <sys/shm.h>
-#include <sys/socket.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <urcu/list.h>
-#include <poll.h>
-#include <unistd.h>
-#include <sys/mman.h>
-#include <urcu/compiler.h>
-#include <ulimit.h>
-#include <inttypes.h>
-
-#include <common/defaults.h>
-#include <common/common.h>
-#include <common/consumer/consumer.h>
-#include <common/consumer/consumer-timer.h>
-#include <common/compat/poll.h>
-#include <common/sessiond-comm/sessiond-comm.h>
-#include <common/utils.h>
-
-#include "lttng-consumerd.h"
-#include "health-consumerd.h"
-
-/* Global health check unix path */
-static char health_unix_sock_path[PATH_MAX];
-
-int health_quit_pipe[2];
-
-/*
- * Check if the thread quit pipe was triggered.
- *
- * Return 1 if it was triggered else 0;
- */
-static
-int check_health_quit_pipe(int fd, uint32_t events)
-{
- if (fd == health_quit_pipe[0] && (events & LPOLLIN)) {
- return 1;
- }
-
- return 0;
-}
-
-/*
- * Send data on a unix socket using the liblttsessiondcomm API.
- *
- * Return lttcomm error code.
- */
-static int send_unix_sock(int sock, void *buf, size_t len)
-{
- /* Check valid length */
- if (len == 0) {
- return -1;
- }
-
- return lttcomm_send_unix_sock(sock, buf, len);
-}
-
-static
-int setup_health_path(void)
-{
- int is_root, ret = 0;
- enum lttng_consumer_type type;
- const char *home_path;
-
- type = lttng_consumer_get_type();
- is_root = !getuid();
-
- if (is_root) {
- if (strlen(health_unix_sock_path) != 0) {
- goto end;
- }
- switch (type) {
- case LTTNG_CONSUMER_KERNEL:
- snprintf(health_unix_sock_path, sizeof(health_unix_sock_path),
- DEFAULT_GLOBAL_KCONSUMER_HEALTH_UNIX_SOCK);
- break;
- case LTTNG_CONSUMER64_UST:
- snprintf(health_unix_sock_path, sizeof(health_unix_sock_path),
- DEFAULT_GLOBAL_USTCONSUMER64_HEALTH_UNIX_SOCK);
- break;
- case LTTNG_CONSUMER32_UST:
- snprintf(health_unix_sock_path, sizeof(health_unix_sock_path),
- DEFAULT_GLOBAL_USTCONSUMER32_HEALTH_UNIX_SOCK);
- break;
- default:
- ret = -EINVAL;
- goto end;
- }
- } else {
- home_path = utils_get_home_dir();
- if (home_path == NULL) {
- /* TODO: Add --socket PATH option */
- ERR("Can't get HOME directory for sockets creation.");
- ret = -EPERM;
- goto end;
- }
-
- /* Set health check Unix path */
- if (strlen(health_unix_sock_path) != 0) {
- goto end;
- }
- switch (type) {
- case LTTNG_CONSUMER_KERNEL:
- snprintf(health_unix_sock_path, sizeof(health_unix_sock_path),
- DEFAULT_HOME_KCONSUMER_HEALTH_UNIX_SOCK, home_path);
- break;
- case LTTNG_CONSUMER64_UST:
- snprintf(health_unix_sock_path, sizeof(health_unix_sock_path),
- DEFAULT_HOME_USTCONSUMER64_HEALTH_UNIX_SOCK, home_path);
- break;
- case LTTNG_CONSUMER32_UST:
- snprintf(health_unix_sock_path, sizeof(health_unix_sock_path),
- DEFAULT_HOME_USTCONSUMER32_HEALTH_UNIX_SOCK, home_path);
- break;
- default:
- ret = -EINVAL;
- goto end;
- }
- }
-end:
- return ret;
-}
-
-/*
- * Thread managing health check socket.
- */
-void *thread_manage_health(void *data)
-{
- int sock = -1, new_sock = -1, ret, i, pollfd, err = -1;
- uint32_t revents, nb_fd;
- struct lttng_poll_event events;
- struct health_comm_msg msg;
- struct health_comm_reply reply;
- int is_root;
-
- DBG("[thread] Manage health check started");
-
- setup_health_path();
-
- rcu_register_thread();
-
- /* We might hit an error path before this is created. */
- lttng_poll_init(&events);
-
- /* Create unix socket */
- sock = lttcomm_create_unix_sock(health_unix_sock_path);
- if (sock < 0) {
- ERR("Unable to create health check Unix socket");
- err = -1;
- goto error;
- }
-
- is_root = !getuid();
- if (is_root) {
- /* lttng health client socket path permissions */
- gid_t gid;
-
- ret = utils_get_group_id(tracing_group_name, true, &gid);
- if (ret) {
- /* Default to root group. */
- gid = 0;
- }
-
- ret = chown(health_unix_sock_path, 0, gid);
- if (ret < 0) {
- ERR("Unable to set group on %s", health_unix_sock_path);
- PERROR("chown");
- err = -1;
- goto error;
- }
-
- ret = chmod(health_unix_sock_path,
- S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
- if (ret < 0) {
- ERR("Unable to set permissions on %s", health_unix_sock_path);
- PERROR("chmod");
- err = -1;
- goto error;
- }
- }
-
- /*
- * Set the CLOEXEC flag. Return code is useless because either way, the
- * show must go on.
- */
- (void) utils_set_fd_cloexec(sock);
-
- ret = lttcomm_listen_unix_sock(sock);
- if (ret < 0) {
- goto error;
- }
-
- /* Size is set to 1 for the consumer_channel pipe */
- ret = lttng_poll_create(&events, 2, LTTNG_CLOEXEC);
- if (ret < 0) {
- ERR("Poll set creation failed");
- goto error;
- }
-
- ret = lttng_poll_add(&events, health_quit_pipe[0], LPOLLIN);
- if (ret < 0) {
- goto error;
- }
-
- /* Add the application registration socket */
- ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLPRI);
- if (ret < 0) {
- goto error;
- }
-
- /* Perform prior memory accesses before decrementing ready */
- cmm_smp_mb__before_uatomic_dec();
- uatomic_dec(<tng_consumer_ready);
-
- while (1) {
- DBG("Health check ready");
-
- /* Inifinite blocking call, waiting for transmission */
-restart:
- ret = lttng_poll_wait(&events, -1);
- if (ret < 0) {
- /*
- * Restart interrupted system call.
- */
- if (errno == EINTR) {
- goto restart;
- }
- goto error;
- }
-
- nb_fd = ret;
-
- for (i = 0; i < nb_fd; i++) {
- /* Fetch once the poll data */
- revents = LTTNG_POLL_GETEV(&events, i);
- pollfd = LTTNG_POLL_GETFD(&events, i);
-
- /* Thread quit pipe has been closed. Killing thread. */
- ret = check_health_quit_pipe(pollfd, revents);
- if (ret) {
- err = 0;
- goto exit;
- }
-
- /* Event on the registration socket */
- if (pollfd == sock) {
- if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)
- && !(revents & LPOLLIN)) {
- ERR("Health socket poll error");
- goto error;
- }
- }
- }
-
- new_sock = lttcomm_accept_unix_sock(sock);
- if (new_sock < 0) {
- goto error;
- }
-
- /*
- * Set the CLOEXEC flag. Return code is useless because either way, the
- * show must go on.
- */
- (void) utils_set_fd_cloexec(new_sock);
-
- DBG("Receiving data from client for health...");
- ret = lttcomm_recv_unix_sock(new_sock, (void *)&msg, sizeof(msg));
- if (ret <= 0) {
- DBG("Nothing recv() from client... continuing");
- ret = close(new_sock);
- if (ret) {
- PERROR("close");
- }
- new_sock = -1;
- continue;
- }
-
- rcu_thread_online();
-
- LTTNG_ASSERT(msg.cmd == HEALTH_CMD_CHECK);
-
- memset(&reply, 0, sizeof(reply));
- for (i = 0; i < NR_HEALTH_CONSUMERD_TYPES; i++) {
- /*
- * health_check_state return 0 if thread is in
- * error.
- */
- if (!health_check_state(health_consumerd, i)) {
- reply.ret_code |= 1ULL << i;
- }
- }
-
- DBG("Health check return value %" PRIx64, reply.ret_code);
-
- ret = send_unix_sock(new_sock, (void *) &reply, sizeof(reply));
- if (ret < 0) {
- ERR("Failed to send health data back to client");
- }
-
- /* End of transmission */
- ret = close(new_sock);
- if (ret) {
- PERROR("close");
- }
- new_sock = -1;
- }
-
-exit:
-error:
- if (err) {
- ERR("Health error occurred in %s", __func__);
- }
- DBG("Health check thread dying");
- unlink(health_unix_sock_path);
- if (sock >= 0) {
- ret = close(sock);
- if (ret) {
- PERROR("close");
- }
- }
-
- lttng_poll_clean(&events);
-
- rcu_unregister_thread();
- return NULL;
-}
--- /dev/null
+/*
+ * Copyright (C) 2013 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0-only
+ *
+ */
+
+#define _LGPL_SOURCE
+#include <fcntl.h>
+#include <getopt.h>
+#include <grp.h>
+#include <limits.h>
+#include <pthread.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ipc.h>
+#include <sys/resource.h>
+#include <sys/shm.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <urcu/list.h>
+#include <poll.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <urcu/compiler.h>
+#include <ulimit.h>
+#include <inttypes.h>
+
+#include <common/defaults.h>
+#include <common/common.h>
+#include <common/consumer/consumer.h>
+#include <common/consumer/consumer-timer.h>
+#include <common/compat/poll.h>
+#include <common/sessiond-comm/sessiond-comm.h>
+#include <common/utils.h>
+
+#include "lttng-consumerd.h"
+#include "health-consumerd.h"
+
+/* Global health check unix path */
+static char health_unix_sock_path[PATH_MAX];
+
+int health_quit_pipe[2];
+
+/*
+ * Check if the thread quit pipe was triggered.
+ *
+ * Return 1 if it was triggered else 0;
+ */
+static
+int check_health_quit_pipe(int fd, uint32_t events)
+{
+ if (fd == health_quit_pipe[0] && (events & LPOLLIN)) {
+ return 1;
+ }
+
+ return 0;
+}
+
+/*
+ * Send data on a unix socket using the liblttsessiondcomm API.
+ *
+ * Return lttcomm error code.
+ */
+static int send_unix_sock(int sock, void *buf, size_t len)
+{
+ /* Check valid length */
+ if (len == 0) {
+ return -1;
+ }
+
+ return lttcomm_send_unix_sock(sock, buf, len);
+}
+
+static
+int setup_health_path(void)
+{
+ int is_root, ret = 0;
+ enum lttng_consumer_type type;
+ const char *home_path;
+
+ type = lttng_consumer_get_type();
+ is_root = !getuid();
+
+ if (is_root) {
+ if (strlen(health_unix_sock_path) != 0) {
+ goto end;
+ }
+ switch (type) {
+ case LTTNG_CONSUMER_KERNEL:
+ snprintf(health_unix_sock_path, sizeof(health_unix_sock_path),
+ DEFAULT_GLOBAL_KCONSUMER_HEALTH_UNIX_SOCK);
+ break;
+ case LTTNG_CONSUMER64_UST:
+ snprintf(health_unix_sock_path, sizeof(health_unix_sock_path),
+ DEFAULT_GLOBAL_USTCONSUMER64_HEALTH_UNIX_SOCK);
+ break;
+ case LTTNG_CONSUMER32_UST:
+ snprintf(health_unix_sock_path, sizeof(health_unix_sock_path),
+ DEFAULT_GLOBAL_USTCONSUMER32_HEALTH_UNIX_SOCK);
+ break;
+ default:
+ ret = -EINVAL;
+ goto end;
+ }
+ } else {
+ home_path = utils_get_home_dir();
+ if (home_path == NULL) {
+ /* TODO: Add --socket PATH option */
+ ERR("Can't get HOME directory for sockets creation.");
+ ret = -EPERM;
+ goto end;
+ }
+
+ /* Set health check Unix path */
+ if (strlen(health_unix_sock_path) != 0) {
+ goto end;
+ }
+ switch (type) {
+ case LTTNG_CONSUMER_KERNEL:
+ snprintf(health_unix_sock_path, sizeof(health_unix_sock_path),
+ DEFAULT_HOME_KCONSUMER_HEALTH_UNIX_SOCK, home_path);
+ break;
+ case LTTNG_CONSUMER64_UST:
+ snprintf(health_unix_sock_path, sizeof(health_unix_sock_path),
+ DEFAULT_HOME_USTCONSUMER64_HEALTH_UNIX_SOCK, home_path);
+ break;
+ case LTTNG_CONSUMER32_UST:
+ snprintf(health_unix_sock_path, sizeof(health_unix_sock_path),
+ DEFAULT_HOME_USTCONSUMER32_HEALTH_UNIX_SOCK, home_path);
+ break;
+ default:
+ ret = -EINVAL;
+ goto end;
+ }
+ }
+end:
+ return ret;
+}
+
+/*
+ * Thread managing health check socket.
+ */
+void *thread_manage_health(void *data)
+{
+ int sock = -1, new_sock = -1, ret, i, pollfd, err = -1;
+ uint32_t revents, nb_fd;
+ struct lttng_poll_event events;
+ struct health_comm_msg msg;
+ struct health_comm_reply reply;
+ int is_root;
+
+ DBG("[thread] Manage health check started");
+
+ setup_health_path();
+
+ rcu_register_thread();
+
+ /* We might hit an error path before this is created. */
+ lttng_poll_init(&events);
+
+ /* Create unix socket */
+ sock = lttcomm_create_unix_sock(health_unix_sock_path);
+ if (sock < 0) {
+ ERR("Unable to create health check Unix socket");
+ err = -1;
+ goto error;
+ }
+
+ is_root = !getuid();
+ if (is_root) {
+ /* lttng health client socket path permissions */
+ gid_t gid;
+
+ ret = utils_get_group_id(tracing_group_name, true, &gid);
+ if (ret) {
+ /* Default to root group. */
+ gid = 0;
+ }
+
+ ret = chown(health_unix_sock_path, 0, gid);
+ if (ret < 0) {
+ ERR("Unable to set group on %s", health_unix_sock_path);
+ PERROR("chown");
+ err = -1;
+ goto error;
+ }
+
+ ret = chmod(health_unix_sock_path,
+ S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
+ if (ret < 0) {
+ ERR("Unable to set permissions on %s", health_unix_sock_path);
+ PERROR("chmod");
+ err = -1;
+ goto error;
+ }
+ }
+
+ /*
+ * Set the CLOEXEC flag. Return code is useless because either way, the
+ * show must go on.
+ */
+ (void) utils_set_fd_cloexec(sock);
+
+ ret = lttcomm_listen_unix_sock(sock);
+ if (ret < 0) {
+ goto error;
+ }
+
+ /* Size is set to 1 for the consumer_channel pipe */
+ ret = lttng_poll_create(&events, 2, LTTNG_CLOEXEC);
+ if (ret < 0) {
+ ERR("Poll set creation failed");
+ goto error;
+ }
+
+ ret = lttng_poll_add(&events, health_quit_pipe[0], LPOLLIN);
+ if (ret < 0) {
+ goto error;
+ }
+
+ /* Add the application registration socket */
+ ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLPRI);
+ if (ret < 0) {
+ goto error;
+ }
+
+ /* Perform prior memory accesses before decrementing ready */
+ cmm_smp_mb__before_uatomic_dec();
+ uatomic_dec(<tng_consumer_ready);
+
+ while (1) {
+ DBG("Health check ready");
+
+ /* Inifinite blocking call, waiting for transmission */
+restart:
+ ret = lttng_poll_wait(&events, -1);
+ if (ret < 0) {
+ /*
+ * Restart interrupted system call.
+ */
+ if (errno == EINTR) {
+ goto restart;
+ }
+ goto error;
+ }
+
+ nb_fd = ret;
+
+ for (i = 0; i < nb_fd; i++) {
+ /* Fetch once the poll data */
+ revents = LTTNG_POLL_GETEV(&events, i);
+ pollfd = LTTNG_POLL_GETFD(&events, i);
+
+ /* Thread quit pipe has been closed. Killing thread. */
+ ret = check_health_quit_pipe(pollfd, revents);
+ if (ret) {
+ err = 0;
+ goto exit;
+ }
+
+ /* Event on the registration socket */
+ if (pollfd == sock) {
+ if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)
+ && !(revents & LPOLLIN)) {
+ ERR("Health socket poll error");
+ goto error;
+ }
+ }
+ }
+
+ new_sock = lttcomm_accept_unix_sock(sock);
+ if (new_sock < 0) {
+ goto error;
+ }
+
+ /*
+ * Set the CLOEXEC flag. Return code is useless because either way, the
+ * show must go on.
+ */
+ (void) utils_set_fd_cloexec(new_sock);
+
+ DBG("Receiving data from client for health...");
+ ret = lttcomm_recv_unix_sock(new_sock, (void *)&msg, sizeof(msg));
+ if (ret <= 0) {
+ DBG("Nothing recv() from client... continuing");
+ ret = close(new_sock);
+ if (ret) {
+ PERROR("close");
+ }
+ new_sock = -1;
+ continue;
+ }
+
+ rcu_thread_online();
+
+ LTTNG_ASSERT(msg.cmd == HEALTH_CMD_CHECK);
+
+ memset(&reply, 0, sizeof(reply));
+ for (i = 0; i < NR_HEALTH_CONSUMERD_TYPES; i++) {
+ /*
+ * health_check_state return 0 if thread is in
+ * error.
+ */
+ if (!health_check_state(health_consumerd, i)) {
+ reply.ret_code |= 1ULL << i;
+ }
+ }
+
+ DBG("Health check return value %" PRIx64, reply.ret_code);
+
+ ret = send_unix_sock(new_sock, (void *) &reply, sizeof(reply));
+ if (ret < 0) {
+ ERR("Failed to send health data back to client");
+ }
+
+ /* End of transmission */
+ ret = close(new_sock);
+ if (ret) {
+ PERROR("close");
+ }
+ new_sock = -1;
+ }
+
+exit:
+error:
+ if (err) {
+ ERR("Health error occurred in %s", __func__);
+ }
+ DBG("Health check thread dying");
+ unlink(health_unix_sock_path);
+ if (sock >= 0) {
+ ret = close(sock);
+ if (ret) {
+ PERROR("close");
+ }
+ }
+
+ lttng_poll_clean(&events);
+
+ rcu_unregister_thread();
+ return NULL;
+}
+++ /dev/null
-/*
- * Copyright (C) 2011 Julien Desfossez <julien.desfossez@polymtl.ca>
- * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * SPDX-License-Identifier: GPL-2.0-only
- *
- */
-
-#define _LGPL_SOURCE
-#include <fcntl.h>
-#include <getopt.h>
-#include <grp.h>
-#include <limits.h>
-#include <pthread.h>
-#include <signal.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/ipc.h>
-#include <sys/resource.h>
-#include <sys/shm.h>
-#include <sys/socket.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <urcu/list.h>
-#include <poll.h>
-#include <unistd.h>
-#include <sys/mman.h>
-#include <urcu/compiler.h>
-#include <ulimit.h>
-
-#include <common/defaults.h>
-#include <common/common.h>
-#include <common/consumer/consumer.h>
-#include <common/consumer/consumer-timer.h>
-#include <common/compat/poll.h>
-#include <common/compat/getenv.h>
-#include <common/sessiond-comm/sessiond-comm.h>
-#include <common/utils.h>
-
-#include "lttng-consumerd.h"
-#include "health-consumerd.h"
-
-/* threads (channel handling, poll, metadata, sessiond) */
-
-static pthread_t channel_thread, data_thread, metadata_thread,
- sessiond_thread, metadata_timer_thread, health_thread;
-static bool metadata_timer_thread_online;
-
-/* to count the number of times the user pressed ctrl+c */
-static int sigintcount = 0;
-
-/* Argument variables */
-int lttng_opt_quiet; /* not static in error.h */
-int lttng_opt_verbose; /* not static in error.h */
-int lttng_opt_mi; /* not static in error.h */
-
-static int opt_daemon;
-static const char *progname;
-static char command_sock_path[PATH_MAX]; /* Global command socket path */
-static char error_sock_path[PATH_MAX]; /* Global error path */
-static enum lttng_consumer_type opt_type = LTTNG_CONSUMER_KERNEL;
-
-/* the liblttngconsumerd context */
-static struct lttng_consumer_local_data *ctx;
-
-/* Consumerd health monitoring */
-struct health_app *health_consumerd;
-
-const char *tracing_group_name = DEFAULT_TRACING_GROUP;
-
-int lttng_consumer_ready = NR_LTTNG_CONSUMER_READY;
-
-enum lttng_consumer_type lttng_consumer_get_type(void)
-{
- if (!ctx) {
- return LTTNG_CONSUMER_UNKNOWN;
- }
- return ctx->type;
-}
-
-/*
- * Signal handler for the daemon
- */
-static void sighandler(int sig, siginfo_t *siginfo, void *arg)
-{
- if (sig == SIGINT && sigintcount++ == 0) {
- DBG("ignoring first SIGINT");
- return;
- }
-
- if (sig == SIGBUS) {
- int write_ret;
- const char msg[] = "Received SIGBUS, aborting program.\n";
-
- lttng_consumer_sigbus_handle(siginfo->si_addr);
- /*
- * If ustctl did not catch this signal (triggering a
- * siglongjmp), abort the program. Otherwise, the execution
- * will resume from the ust-ctl call which caused this error.
- *
- * The return value is ignored since the program aborts anyhow.
- */
- write_ret = write(STDERR_FILENO, msg, sizeof(msg));
- (void) write_ret;
- abort();
- }
-
- if (ctx) {
- lttng_consumer_should_exit(ctx);
- }
-}
-
-/*
- * Setup signal handler for :
- * SIGINT, SIGTERM, SIGPIPE, SIGBUS
- */
-static int set_signal_handler(void)
-{
- int ret = 0;
- struct sigaction sa;
- sigset_t sigset;
-
- if ((ret = sigemptyset(&sigset)) < 0) {
- PERROR("sigemptyset");
- return ret;
- }
-
- sa.sa_mask = sigset;
- sa.sa_flags = SA_SIGINFO;
-
- sa.sa_sigaction = sighandler;
- if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) {
- PERROR("sigaction");
- return ret;
- }
-
- if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) {
- PERROR("sigaction");
- return ret;
- }
-
- if ((ret = sigaction(SIGBUS, &sa, NULL)) < 0) {
- PERROR("sigaction");
- return ret;
- }
-
- sa.sa_flags = 0;
- sa.sa_handler = SIG_IGN;
- if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) {
- PERROR("sigaction");
- return ret;
- }
-
- return ret;
-}
-
-/*
- * Usage function on stream file.
- */
-static void usage(FILE *fp)
-{
- fprintf(fp, "Usage: %s OPTIONS\n\nOptions:\n", progname);
- fprintf(fp, " -h, --help "
- "Display this usage.\n");
- fprintf(fp, " -c, --consumerd-cmd-sock PATH "
- "Specify path for the command socket\n");
- fprintf(fp, " -e, --consumerd-err-sock PATH "
- "Specify path for the error socket\n");
- fprintf(fp, " -d, --daemonize "
- "Start as a daemon.\n");
- fprintf(fp, " -q, --quiet "
- "No output at all.\n");
- fprintf(fp, " -v, --verbose "
- "Verbose mode. Activate DBG() macro.\n");
- fprintf(fp, " -V, --version "
- "Show version number.\n");
- fprintf(fp, " -g, --group NAME "
- "Specify the tracing group name. (default: tracing)\n");
- fprintf(fp, " -k, --kernel "
- "Consumer kernel buffers (default).\n");
- fprintf(fp, " -u, --ust "
- "Consumer UST buffers.%s\n",
-#ifdef HAVE_LIBLTTNG_UST_CTL
- ""
-#else
- " (support not compiled in)"
-#endif
- );
-}
-
-/*
- * daemon argument parsing
- */
-static int parse_args(int argc, char **argv)
-{
- int c, ret = 0;
-
- static struct option long_options[] = {
- { "consumerd-cmd-sock", 1, 0, 'c' },
- { "consumerd-err-sock", 1, 0, 'e' },
- { "daemonize", 0, 0, 'd' },
- { "group", 1, 0, 'g' },
- { "help", 0, 0, 'h' },
- { "quiet", 0, 0, 'q' },
- { "verbose", 0, 0, 'v' },
- { "version", 0, 0, 'V' },
- { "kernel", 0, 0, 'k' },
-#ifdef HAVE_LIBLTTNG_UST_CTL
- { "ust", 0, 0, 'u' },
-#endif
- { NULL, 0, 0, 0 }
- };
-
- while (1) {
- int option_index = 0;
- c = getopt_long(argc, argv, "dhqvVku" "c:e:g:",
- long_options, &option_index);
- if (c == -1) {
- break;
- }
-
- switch (c) {
- case 0:
- fprintf(stderr, "option %s",
- long_options[option_index].name);
- if (optarg) {
- fprintf(stderr, " with arg %s\n", optarg);
- ret = -1;
- goto end;
- }
- break;
- case 'c':
- if (lttng_is_setuid_setgid()) {
- WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
- "-c, --consumerd-cmd-sock");
- } else {
- snprintf(command_sock_path, PATH_MAX, "%s", optarg);
- }
- break;
- case 'e':
- if (lttng_is_setuid_setgid()) {
- WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
- "-e, --consumerd-err-sock");
- } else {
- snprintf(error_sock_path, PATH_MAX, "%s", optarg);
- }
- break;
- case 'd':
- opt_daemon = 1;
- break;
- case 'g':
- if (lttng_is_setuid_setgid()) {
- WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
- "-g, --group");
- } else {
- tracing_group_name = optarg;
- }
- break;
- case 'h':
- usage(stdout);
- exit(EXIT_SUCCESS);
- case 'q':
- lttng_opt_quiet = 1;
- break;
- case 'v':
- lttng_opt_verbose = 3;
- break;
- case 'V':
- fprintf(stdout, "%s\n", VERSION);
- exit(EXIT_SUCCESS);
- case 'k':
- opt_type = LTTNG_CONSUMER_KERNEL;
- break;
-#ifdef HAVE_LIBLTTNG_UST_CTL
- case 'u':
-# if (CAA_BITS_PER_LONG == 64)
- opt_type = LTTNG_CONSUMER64_UST;
-# elif (CAA_BITS_PER_LONG == 32)
- opt_type = LTTNG_CONSUMER32_UST;
-# else
-# error "Unknown bitness"
-# endif
- break;
-#endif
- default:
- usage(stderr);
- ret = -1;
- goto end;
- }
- }
-end:
- return ret;
-}
-
-/*
- * Set open files limit to unlimited. This daemon can open a large number of
- * file descriptors in order to consumer multiple kernel traces.
- */
-static void set_ulimit(void)
-{
- int ret;
- struct rlimit lim;
-
- /* The kernel does not allowed an infinite limit for open files */
- lim.rlim_cur = 65535;
- lim.rlim_max = 65535;
-
- ret = setrlimit(RLIMIT_NOFILE, &lim);
- if (ret < 0) {
- PERROR("failed to set open files limit");
- }
-}
-
-/*
- * main
- */
-int main(int argc, char **argv)
-{
- int ret = 0, retval = 0;
- void *status;
- struct lttng_consumer_local_data *tmp_ctx;
-
- rcu_register_thread();
-
- if (run_as_create_worker(argv[0], NULL, NULL) < 0) {
- goto exit_set_signal_handler;
- }
-
- if (set_signal_handler()) {
- retval = -1;
- goto exit_set_signal_handler;
- }
-
- /* Parse arguments */
- progname = argv[0];
- if (parse_args(argc, argv)) {
- retval = -1;
- goto exit_options;
- }
-
- /* Daemonize */
- if (opt_daemon) {
- int i;
-
- /*
- * fork
- * child: setsid, close FD 0, 1, 2, chdir /
- * parent: exit (if fork is successful)
- */
- ret = daemon(0, 0);
- if (ret < 0) {
- PERROR("daemon");
- retval = -1;
- goto exit_options;
- }
- /*
- * We are in the child. Make sure all other file
- * descriptors are closed, in case we are called with
- * more opened file descriptors than the standard ones.
- */
- for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) {
- (void) close(i);
- }
- }
-
- /*
- * Starting from here, we can create threads. This needs to be after
- * lttng_daemonize due to RCU.
- */
-
- health_consumerd = health_app_create(NR_HEALTH_CONSUMERD_TYPES);
- if (!health_consumerd) {
- retval = -1;
- goto exit_health_consumerd_cleanup;
- }
-
- if (*command_sock_path == '\0') {
- switch (opt_type) {
- case LTTNG_CONSUMER_KERNEL:
- ret = snprintf(command_sock_path, PATH_MAX,
- DEFAULT_KCONSUMERD_CMD_SOCK_PATH,
- DEFAULT_LTTNG_RUNDIR);
- if (ret < 0) {
- retval = -1;
- goto exit_init_data;
- }
- break;
- case LTTNG_CONSUMER64_UST:
- ret = snprintf(command_sock_path, PATH_MAX,
- DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH,
- DEFAULT_LTTNG_RUNDIR);
- if (ret < 0) {
- retval = -1;
- goto exit_init_data;
- }
- break;
- case LTTNG_CONSUMER32_UST:
- ret = snprintf(command_sock_path, PATH_MAX,
- DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH,
- DEFAULT_LTTNG_RUNDIR);
- if (ret < 0) {
- retval = -1;
- goto exit_init_data;
- }
- break;
- default:
- ERR("Unknown consumerd type");
- retval = -1;
- goto exit_init_data;
- }
- }
-
- /* Init */
- if (lttng_consumer_init()) {
- retval = -1;
- goto exit_init_data;
- }
-
- /* Initialize communication library */
- lttcomm_init();
- /* Initialize TCP timeout values */
- lttcomm_inet_init();
-
- if (!getuid()) {
- /* Set limit for open files */
- set_ulimit();
- }
-
- /* create the consumer instance with and assign the callbacks */
- ctx = lttng_consumer_create(opt_type, lttng_consumer_read_subbuffer,
- NULL, lttng_consumer_on_recv_stream, NULL);
- if (!ctx) {
- retval = -1;
- goto exit_init_data;
- }
-
- lttng_consumer_set_command_sock_path(ctx, command_sock_path);
- if (*error_sock_path == '\0') {
- switch (opt_type) {
- case LTTNG_CONSUMER_KERNEL:
- ret = snprintf(error_sock_path, PATH_MAX,
- DEFAULT_KCONSUMERD_ERR_SOCK_PATH,
- DEFAULT_LTTNG_RUNDIR);
- if (ret < 0) {
- retval = -1;
- goto exit_init_data;
- }
- break;
- case LTTNG_CONSUMER64_UST:
- ret = snprintf(error_sock_path, PATH_MAX,
- DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH,
- DEFAULT_LTTNG_RUNDIR);
- if (ret < 0) {
- retval = -1;
- goto exit_init_data;
- }
- break;
- case LTTNG_CONSUMER32_UST:
- ret = snprintf(error_sock_path, PATH_MAX,
- DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH,
- DEFAULT_LTTNG_RUNDIR);
- if (ret < 0) {
- retval = -1;
- goto exit_init_data;
- }
- break;
- default:
- ERR("Unknown consumerd type");
- retval = -1;
- goto exit_init_data;
- }
- }
-
- /* Connect to the socket created by lttng-sessiond to report errors */
- DBG("Connecting to error socket %s", error_sock_path);
- ret = lttcomm_connect_unix_sock(error_sock_path);
- /*
- * Not a fatal error, but all communication with lttng-sessiond will
- * fail.
- */
- if (ret < 0) {
- WARN("Cannot connect to error socket (is lttng-sessiond started?)");
- }
- lttng_consumer_set_error_sock(ctx, ret);
-
- /*
- * Block RT signals used for UST periodical metadata flush and the live
- * timer in main, and create a dedicated thread to handle these signals.
- */
- if (consumer_signal_init()) {
- retval = -1;
- goto exit_init_data;
- }
-
- ctx->type = opt_type;
-
- if (utils_create_pipe(health_quit_pipe)) {
- retval = -1;
- goto exit_health_pipe;
- }
-
- /* Create thread to manage the client socket */
- ret = pthread_create(&health_thread, default_pthread_attr(),
- thread_manage_health, (void *) NULL);
- if (ret) {
- errno = ret;
- PERROR("pthread_create health");
- retval = -1;
- goto exit_health_thread;
- }
-
- /*
- * Wait for health thread to be initialized before letting the
- * sessiond thread reply to the sessiond that we are ready.
- */
- while (uatomic_read(<tng_consumer_ready)) {
- usleep(100000);
- }
- cmm_smp_mb(); /* Read ready before following operations */
-
- /*
- * Create the thread to manage the UST metadata periodic timer and
- * live timer.
- */
- ret = pthread_create(&metadata_timer_thread, NULL,
- consumer_timer_thread, (void *) ctx);
- if (ret) {
- errno = ret;
- PERROR("pthread_create");
- retval = -1;
- goto exit_metadata_timer_thread;
- }
- metadata_timer_thread_online = true;
-
- /* Create thread to manage channels */
- ret = pthread_create(&channel_thread, default_pthread_attr(),
- consumer_thread_channel_poll,
- (void *) ctx);
- if (ret) {
- errno = ret;
- PERROR("pthread_create");
- retval = -1;
- goto exit_channel_thread;
- }
-
- /* Create thread to manage the polling/writing of trace metadata */
- ret = pthread_create(&metadata_thread, default_pthread_attr(),
- consumer_thread_metadata_poll,
- (void *) ctx);
- if (ret) {
- errno = ret;
- PERROR("pthread_create");
- retval = -1;
- goto exit_metadata_thread;
- }
-
- /* Create thread to manage the polling/writing of trace data */
- ret = pthread_create(&data_thread, default_pthread_attr(),
- consumer_thread_data_poll, (void *) ctx);
- if (ret) {
- errno = ret;
- PERROR("pthread_create");
- retval = -1;
- goto exit_data_thread;
- }
-
- /* Create the thread to manage the reception of fds */
- ret = pthread_create(&sessiond_thread, default_pthread_attr(),
- consumer_thread_sessiond_poll,
- (void *) ctx);
- if (ret) {
- errno = ret;
- PERROR("pthread_create");
- retval = -1;
- goto exit_sessiond_thread;
- }
-
-
- /*
- * This is where we start awaiting program completion (e.g. through
- * signal that asks threads to teardown.
- */
-
- ret = pthread_join(sessiond_thread, &status);
- if (ret) {
- errno = ret;
- PERROR("pthread_join sessiond_thread");
- retval = -1;
- }
-exit_sessiond_thread:
-
- ret = pthread_join(data_thread, &status);
- if (ret) {
- errno = ret;
- PERROR("pthread_join data_thread");
- retval = -1;
- }
-exit_data_thread:
-
- ret = pthread_join(metadata_thread, &status);
- if (ret) {
- errno = ret;
- PERROR("pthread_join metadata_thread");
- retval = -1;
- }
-exit_metadata_thread:
-
- ret = pthread_join(channel_thread, &status);
- if (ret) {
- errno = ret;
- PERROR("pthread_join channel_thread");
- retval = -1;
- }
-exit_channel_thread:
-
-exit_metadata_timer_thread:
-
- ret = pthread_join(health_thread, &status);
- if (ret) {
- errno = ret;
- PERROR("pthread_join health_thread");
- retval = -1;
- }
-exit_health_thread:
-
- utils_close_pipe(health_quit_pipe);
-exit_health_pipe:
-
-exit_init_data:
- /*
- * Wait for all pending call_rcu work to complete before tearing
- * down data structures. call_rcu worker may be trying to
- * perform lookups in those structures.
- */
- rcu_barrier();
- lttng_consumer_cleanup();
- /*
- * Tearing down the metadata timer thread in a
- * non-fully-symmetric fashion compared to its creation in case
- * lttng_consumer_cleanup() ends up tearing down timers (which
- * requires the timer thread to be alive).
- */
- if (metadata_timer_thread_online) {
- /*
- * Ensure the metadata timer thread exits only after all other
- * threads are gone, because it is required to perform timer
- * teardown synchronization.
- */
- kill(getpid(), LTTNG_CONSUMER_SIG_EXIT);
- ret = pthread_join(metadata_timer_thread, &status);
- if (ret) {
- errno = ret;
- PERROR("pthread_join metadata_timer_thread");
- retval = -1;
- }
- ret = consumer_timer_thread_get_channel_monitor_pipe();
- if (ret >= 0) {
- ret = close(ret);
- if (ret) {
- PERROR("close channel monitor pipe");
- }
- }
- metadata_timer_thread_online = false;
- }
- tmp_ctx = ctx;
- ctx = NULL;
- cmm_barrier(); /* Clear ctx for signal handler. */
- lttng_consumer_destroy(tmp_ctx);
-
- if (health_consumerd) {
- health_app_destroy(health_consumerd);
- }
- /* Ensure all prior call_rcu are done. */
- rcu_barrier();
-
- run_as_destroy_worker();
-
-exit_health_consumerd_cleanup:
-exit_options:
-exit_set_signal_handler:
-
- rcu_unregister_thread();
-
- if (!retval) {
- exit(EXIT_SUCCESS);
- } else {
- exit(EXIT_FAILURE);
- }
-}
--- /dev/null
+/*
+ * Copyright (C) 2011 Julien Desfossez <julien.desfossez@polymtl.ca>
+ * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0-only
+ *
+ */
+
+#define _LGPL_SOURCE
+#include <fcntl.h>
+#include <getopt.h>
+#include <grp.h>
+#include <limits.h>
+#include <pthread.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ipc.h>
+#include <sys/resource.h>
+#include <sys/shm.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <urcu/list.h>
+#include <poll.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <urcu/compiler.h>
+#include <ulimit.h>
+
+#include <common/defaults.h>
+#include <common/common.h>
+#include <common/consumer/consumer.h>
+#include <common/consumer/consumer-timer.h>
+#include <common/compat/poll.h>
+#include <common/compat/getenv.h>
+#include <common/sessiond-comm/sessiond-comm.h>
+#include <common/utils.h>
+
+#include "lttng-consumerd.h"
+#include "health-consumerd.h"
+
+/* threads (channel handling, poll, metadata, sessiond) */
+
+static pthread_t channel_thread, data_thread, metadata_thread,
+ sessiond_thread, metadata_timer_thread, health_thread;
+static bool metadata_timer_thread_online;
+
+/* to count the number of times the user pressed ctrl+c */
+static int sigintcount = 0;
+
+/* Argument variables */
+int lttng_opt_quiet; /* not static in error.h */
+int lttng_opt_verbose; /* not static in error.h */
+int lttng_opt_mi; /* not static in error.h */
+
+static int opt_daemon;
+static const char *progname;
+static char command_sock_path[PATH_MAX]; /* Global command socket path */
+static char error_sock_path[PATH_MAX]; /* Global error path */
+static enum lttng_consumer_type opt_type = LTTNG_CONSUMER_KERNEL;
+
+/* the liblttngconsumerd context */
+static struct lttng_consumer_local_data *ctx;
+
+/* Consumerd health monitoring */
+struct health_app *health_consumerd;
+
+const char *tracing_group_name = DEFAULT_TRACING_GROUP;
+
+int lttng_consumer_ready = NR_LTTNG_CONSUMER_READY;
+
+enum lttng_consumer_type lttng_consumer_get_type(void)
+{
+ if (!ctx) {
+ return LTTNG_CONSUMER_UNKNOWN;
+ }
+ return ctx->type;
+}
+
+/*
+ * Signal handler for the daemon
+ */
+static void sighandler(int sig, siginfo_t *siginfo, void *arg)
+{
+ if (sig == SIGINT && sigintcount++ == 0) {
+ DBG("ignoring first SIGINT");
+ return;
+ }
+
+ if (sig == SIGBUS) {
+ int write_ret;
+ const char msg[] = "Received SIGBUS, aborting program.\n";
+
+ lttng_consumer_sigbus_handle(siginfo->si_addr);
+ /*
+ * If ustctl did not catch this signal (triggering a
+ * siglongjmp), abort the program. Otherwise, the execution
+ * will resume from the ust-ctl call which caused this error.
+ *
+ * The return value is ignored since the program aborts anyhow.
+ */
+ write_ret = write(STDERR_FILENO, msg, sizeof(msg));
+ (void) write_ret;
+ abort();
+ }
+
+ if (ctx) {
+ lttng_consumer_should_exit(ctx);
+ }
+}
+
+/*
+ * Setup signal handler for :
+ * SIGINT, SIGTERM, SIGPIPE, SIGBUS
+ */
+static int set_signal_handler(void)
+{
+ int ret = 0;
+ struct sigaction sa;
+ sigset_t sigset;
+
+ if ((ret = sigemptyset(&sigset)) < 0) {
+ PERROR("sigemptyset");
+ return ret;
+ }
+
+ sa.sa_mask = sigset;
+ sa.sa_flags = SA_SIGINFO;
+
+ sa.sa_sigaction = sighandler;
+ if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) {
+ PERROR("sigaction");
+ return ret;
+ }
+
+ if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) {
+ PERROR("sigaction");
+ return ret;
+ }
+
+ if ((ret = sigaction(SIGBUS, &sa, NULL)) < 0) {
+ PERROR("sigaction");
+ return ret;
+ }
+
+ sa.sa_flags = 0;
+ sa.sa_handler = SIG_IGN;
+ if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) {
+ PERROR("sigaction");
+ return ret;
+ }
+
+ return ret;
+}
+
+/*
+ * Usage function on stream file.
+ */
+static void usage(FILE *fp)
+{
+ fprintf(fp, "Usage: %s OPTIONS\n\nOptions:\n", progname);
+ fprintf(fp, " -h, --help "
+ "Display this usage.\n");
+ fprintf(fp, " -c, --consumerd-cmd-sock PATH "
+ "Specify path for the command socket\n");
+ fprintf(fp, " -e, --consumerd-err-sock PATH "
+ "Specify path for the error socket\n");
+ fprintf(fp, " -d, --daemonize "
+ "Start as a daemon.\n");
+ fprintf(fp, " -q, --quiet "
+ "No output at all.\n");
+ fprintf(fp, " -v, --verbose "
+ "Verbose mode. Activate DBG() macro.\n");
+ fprintf(fp, " -V, --version "
+ "Show version number.\n");
+ fprintf(fp, " -g, --group NAME "
+ "Specify the tracing group name. (default: tracing)\n");
+ fprintf(fp, " -k, --kernel "
+ "Consumer kernel buffers (default).\n");
+ fprintf(fp, " -u, --ust "
+ "Consumer UST buffers.%s\n",
+#ifdef HAVE_LIBLTTNG_UST_CTL
+ ""
+#else
+ " (support not compiled in)"
+#endif
+ );
+}
+
+/*
+ * daemon argument parsing
+ */
+static int parse_args(int argc, char **argv)
+{
+ int c, ret = 0;
+
+ static struct option long_options[] = {
+ { "consumerd-cmd-sock", 1, 0, 'c' },
+ { "consumerd-err-sock", 1, 0, 'e' },
+ { "daemonize", 0, 0, 'd' },
+ { "group", 1, 0, 'g' },
+ { "help", 0, 0, 'h' },
+ { "quiet", 0, 0, 'q' },
+ { "verbose", 0, 0, 'v' },
+ { "version", 0, 0, 'V' },
+ { "kernel", 0, 0, 'k' },
+#ifdef HAVE_LIBLTTNG_UST_CTL
+ { "ust", 0, 0, 'u' },
+#endif
+ { NULL, 0, 0, 0 }
+ };
+
+ while (1) {
+ int option_index = 0;
+ c = getopt_long(argc, argv, "dhqvVku" "c:e:g:",
+ long_options, &option_index);
+ if (c == -1) {
+ break;
+ }
+
+ switch (c) {
+ case 0:
+ fprintf(stderr, "option %s",
+ long_options[option_index].name);
+ if (optarg) {
+ fprintf(stderr, " with arg %s\n", optarg);
+ ret = -1;
+ goto end;
+ }
+ break;
+ case 'c':
+ if (lttng_is_setuid_setgid()) {
+ WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
+ "-c, --consumerd-cmd-sock");
+ } else {
+ snprintf(command_sock_path, PATH_MAX, "%s", optarg);
+ }
+ break;
+ case 'e':
+ if (lttng_is_setuid_setgid()) {
+ WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
+ "-e, --consumerd-err-sock");
+ } else {
+ snprintf(error_sock_path, PATH_MAX, "%s", optarg);
+ }
+ break;
+ case 'd':
+ opt_daemon = 1;
+ break;
+ case 'g':
+ if (lttng_is_setuid_setgid()) {
+ WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
+ "-g, --group");
+ } else {
+ tracing_group_name = optarg;
+ }
+ break;
+ case 'h':
+ usage(stdout);
+ exit(EXIT_SUCCESS);
+ case 'q':
+ lttng_opt_quiet = 1;
+ break;
+ case 'v':
+ lttng_opt_verbose = 3;
+ break;
+ case 'V':
+ fprintf(stdout, "%s\n", VERSION);
+ exit(EXIT_SUCCESS);
+ case 'k':
+ opt_type = LTTNG_CONSUMER_KERNEL;
+ break;
+#ifdef HAVE_LIBLTTNG_UST_CTL
+ case 'u':
+# if (CAA_BITS_PER_LONG == 64)
+ opt_type = LTTNG_CONSUMER64_UST;
+# elif (CAA_BITS_PER_LONG == 32)
+ opt_type = LTTNG_CONSUMER32_UST;
+# else
+# error "Unknown bitness"
+# endif
+ break;
+#endif
+ default:
+ usage(stderr);
+ ret = -1;
+ goto end;
+ }
+ }
+end:
+ return ret;
+}
+
+/*
+ * Set open files limit to unlimited. This daemon can open a large number of
+ * file descriptors in order to consumer multiple kernel traces.
+ */
+static void set_ulimit(void)
+{
+ int ret;
+ struct rlimit lim;
+
+ /* The kernel does not allowed an infinite limit for open files */
+ lim.rlim_cur = 65535;
+ lim.rlim_max = 65535;
+
+ ret = setrlimit(RLIMIT_NOFILE, &lim);
+ if (ret < 0) {
+ PERROR("failed to set open files limit");
+ }
+}
+
+/*
+ * main
+ */
+int main(int argc, char **argv)
+{
+ int ret = 0, retval = 0;
+ void *status;
+ struct lttng_consumer_local_data *tmp_ctx;
+
+ rcu_register_thread();
+
+ if (run_as_create_worker(argv[0], NULL, NULL) < 0) {
+ goto exit_set_signal_handler;
+ }
+
+ if (set_signal_handler()) {
+ retval = -1;
+ goto exit_set_signal_handler;
+ }
+
+ /* Parse arguments */
+ progname = argv[0];
+ if (parse_args(argc, argv)) {
+ retval = -1;
+ goto exit_options;
+ }
+
+ /* Daemonize */
+ if (opt_daemon) {
+ int i;
+
+ /*
+ * fork
+ * child: setsid, close FD 0, 1, 2, chdir /
+ * parent: exit (if fork is successful)
+ */
+ ret = daemon(0, 0);
+ if (ret < 0) {
+ PERROR("daemon");
+ retval = -1;
+ goto exit_options;
+ }
+ /*
+ * We are in the child. Make sure all other file
+ * descriptors are closed, in case we are called with
+ * more opened file descriptors than the standard ones.
+ */
+ for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) {
+ (void) close(i);
+ }
+ }
+
+ /*
+ * Starting from here, we can create threads. This needs to be after
+ * lttng_daemonize due to RCU.
+ */
+
+ health_consumerd = health_app_create(NR_HEALTH_CONSUMERD_TYPES);
+ if (!health_consumerd) {
+ retval = -1;
+ goto exit_health_consumerd_cleanup;
+ }
+
+ if (*command_sock_path == '\0') {
+ switch (opt_type) {
+ case LTTNG_CONSUMER_KERNEL:
+ ret = snprintf(command_sock_path, PATH_MAX,
+ DEFAULT_KCONSUMERD_CMD_SOCK_PATH,
+ DEFAULT_LTTNG_RUNDIR);
+ if (ret < 0) {
+ retval = -1;
+ goto exit_init_data;
+ }
+ break;
+ case LTTNG_CONSUMER64_UST:
+ ret = snprintf(command_sock_path, PATH_MAX,
+ DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH,
+ DEFAULT_LTTNG_RUNDIR);
+ if (ret < 0) {
+ retval = -1;
+ goto exit_init_data;
+ }
+ break;
+ case LTTNG_CONSUMER32_UST:
+ ret = snprintf(command_sock_path, PATH_MAX,
+ DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH,
+ DEFAULT_LTTNG_RUNDIR);
+ if (ret < 0) {
+ retval = -1;
+ goto exit_init_data;
+ }
+ break;
+ default:
+ ERR("Unknown consumerd type");
+ retval = -1;
+ goto exit_init_data;
+ }
+ }
+
+ /* Init */
+ if (lttng_consumer_init()) {
+ retval = -1;
+ goto exit_init_data;
+ }
+
+ /* Initialize communication library */
+ lttcomm_init();
+ /* Initialize TCP timeout values */
+ lttcomm_inet_init();
+
+ if (!getuid()) {
+ /* Set limit for open files */
+ set_ulimit();
+ }
+
+ /* create the consumer instance with and assign the callbacks */
+ ctx = lttng_consumer_create(opt_type, lttng_consumer_read_subbuffer,
+ NULL, lttng_consumer_on_recv_stream, NULL);
+ if (!ctx) {
+ retval = -1;
+ goto exit_init_data;
+ }
+
+ lttng_consumer_set_command_sock_path(ctx, command_sock_path);
+ if (*error_sock_path == '\0') {
+ switch (opt_type) {
+ case LTTNG_CONSUMER_KERNEL:
+ ret = snprintf(error_sock_path, PATH_MAX,
+ DEFAULT_KCONSUMERD_ERR_SOCK_PATH,
+ DEFAULT_LTTNG_RUNDIR);
+ if (ret < 0) {
+ retval = -1;
+ goto exit_init_data;
+ }
+ break;
+ case LTTNG_CONSUMER64_UST:
+ ret = snprintf(error_sock_path, PATH_MAX,
+ DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH,
+ DEFAULT_LTTNG_RUNDIR);
+ if (ret < 0) {
+ retval = -1;
+ goto exit_init_data;
+ }
+ break;
+ case LTTNG_CONSUMER32_UST:
+ ret = snprintf(error_sock_path, PATH_MAX,
+ DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH,
+ DEFAULT_LTTNG_RUNDIR);
+ if (ret < 0) {
+ retval = -1;
+ goto exit_init_data;
+ }
+ break;
+ default:
+ ERR("Unknown consumerd type");
+ retval = -1;
+ goto exit_init_data;
+ }
+ }
+
+ /* Connect to the socket created by lttng-sessiond to report errors */
+ DBG("Connecting to error socket %s", error_sock_path);
+ ret = lttcomm_connect_unix_sock(error_sock_path);
+ /*
+ * Not a fatal error, but all communication with lttng-sessiond will
+ * fail.
+ */
+ if (ret < 0) {
+ WARN("Cannot connect to error socket (is lttng-sessiond started?)");
+ }
+ lttng_consumer_set_error_sock(ctx, ret);
+
+ /*
+ * Block RT signals used for UST periodical metadata flush and the live
+ * timer in main, and create a dedicated thread to handle these signals.
+ */
+ if (consumer_signal_init()) {
+ retval = -1;
+ goto exit_init_data;
+ }
+
+ ctx->type = opt_type;
+
+ if (utils_create_pipe(health_quit_pipe)) {
+ retval = -1;
+ goto exit_health_pipe;
+ }
+
+ /* Create thread to manage the client socket */
+ ret = pthread_create(&health_thread, default_pthread_attr(),
+ thread_manage_health, (void *) NULL);
+ if (ret) {
+ errno = ret;
+ PERROR("pthread_create health");
+ retval = -1;
+ goto exit_health_thread;
+ }
+
+ /*
+ * Wait for health thread to be initialized before letting the
+ * sessiond thread reply to the sessiond that we are ready.
+ */
+ while (uatomic_read(<tng_consumer_ready)) {
+ usleep(100000);
+ }
+ cmm_smp_mb(); /* Read ready before following operations */
+
+ /*
+ * Create the thread to manage the UST metadata periodic timer and
+ * live timer.
+ */
+ ret = pthread_create(&metadata_timer_thread, NULL,
+ consumer_timer_thread, (void *) ctx);
+ if (ret) {
+ errno = ret;
+ PERROR("pthread_create");
+ retval = -1;
+ goto exit_metadata_timer_thread;
+ }
+ metadata_timer_thread_online = true;
+
+ /* Create thread to manage channels */
+ ret = pthread_create(&channel_thread, default_pthread_attr(),
+ consumer_thread_channel_poll,
+ (void *) ctx);
+ if (ret) {
+ errno = ret;
+ PERROR("pthread_create");
+ retval = -1;
+ goto exit_channel_thread;
+ }
+
+ /* Create thread to manage the polling/writing of trace metadata */
+ ret = pthread_create(&metadata_thread, default_pthread_attr(),
+ consumer_thread_metadata_poll,
+ (void *) ctx);
+ if (ret) {
+ errno = ret;
+ PERROR("pthread_create");
+ retval = -1;
+ goto exit_metadata_thread;
+ }
+
+ /* Create thread to manage the polling/writing of trace data */
+ ret = pthread_create(&data_thread, default_pthread_attr(),
+ consumer_thread_data_poll, (void *) ctx);
+ if (ret) {
+ errno = ret;
+ PERROR("pthread_create");
+ retval = -1;
+ goto exit_data_thread;
+ }
+
+ /* Create the thread to manage the reception of fds */
+ ret = pthread_create(&sessiond_thread, default_pthread_attr(),
+ consumer_thread_sessiond_poll,
+ (void *) ctx);
+ if (ret) {
+ errno = ret;
+ PERROR("pthread_create");
+ retval = -1;
+ goto exit_sessiond_thread;
+ }
+
+
+ /*
+ * This is where we start awaiting program completion (e.g. through
+ * signal that asks threads to teardown.
+ */
+
+ ret = pthread_join(sessiond_thread, &status);
+ if (ret) {
+ errno = ret;
+ PERROR("pthread_join sessiond_thread");
+ retval = -1;
+ }
+exit_sessiond_thread:
+
+ ret = pthread_join(data_thread, &status);
+ if (ret) {
+ errno = ret;
+ PERROR("pthread_join data_thread");
+ retval = -1;
+ }
+exit_data_thread:
+
+ ret = pthread_join(metadata_thread, &status);
+ if (ret) {
+ errno = ret;
+ PERROR("pthread_join metadata_thread");
+ retval = -1;
+ }
+exit_metadata_thread:
+
+ ret = pthread_join(channel_thread, &status);
+ if (ret) {
+ errno = ret;
+ PERROR("pthread_join channel_thread");
+ retval = -1;
+ }
+exit_channel_thread:
+
+exit_metadata_timer_thread:
+
+ ret = pthread_join(health_thread, &status);
+ if (ret) {
+ errno = ret;
+ PERROR("pthread_join health_thread");
+ retval = -1;
+ }
+exit_health_thread:
+
+ utils_close_pipe(health_quit_pipe);
+exit_health_pipe:
+
+exit_init_data:
+ /*
+ * Wait for all pending call_rcu work to complete before tearing
+ * down data structures. call_rcu worker may be trying to
+ * perform lookups in those structures.
+ */
+ rcu_barrier();
+ lttng_consumer_cleanup();
+ /*
+ * Tearing down the metadata timer thread in a
+ * non-fully-symmetric fashion compared to its creation in case
+ * lttng_consumer_cleanup() ends up tearing down timers (which
+ * requires the timer thread to be alive).
+ */
+ if (metadata_timer_thread_online) {
+ /*
+ * Ensure the metadata timer thread exits only after all other
+ * threads are gone, because it is required to perform timer
+ * teardown synchronization.
+ */
+ kill(getpid(), LTTNG_CONSUMER_SIG_EXIT);
+ ret = pthread_join(metadata_timer_thread, &status);
+ if (ret) {
+ errno = ret;
+ PERROR("pthread_join metadata_timer_thread");
+ retval = -1;
+ }
+ ret = consumer_timer_thread_get_channel_monitor_pipe();
+ if (ret >= 0) {
+ ret = close(ret);
+ if (ret) {
+ PERROR("close channel monitor pipe");
+ }
+ }
+ metadata_timer_thread_online = false;
+ }
+ tmp_ctx = ctx;
+ ctx = NULL;
+ cmm_barrier(); /* Clear ctx for signal handler. */
+ lttng_consumer_destroy(tmp_ctx);
+
+ if (health_consumerd) {
+ health_app_destroy(health_consumerd);
+ }
+ /* Ensure all prior call_rcu are done. */
+ rcu_barrier();
+
+ run_as_destroy_worker();
+
+exit_health_consumerd_cleanup:
+exit_options:
+exit_set_signal_handler:
+
+ rcu_unregister_thread();
+
+ if (!retval) {
+ exit(EXIT_SUCCESS);
+ } else {
+ exit(EXIT_FAILURE);
+ }
+}
extern const char *tracing_group_name;
-enum lttng_consumer_type lttng_consumer_get_type(void);
+/*
+ * This function is dlsym-ed from a test, making it have a C linkage name
+ * makes it easier.
+ */
+extern "C" enum lttng_consumer_type lttng_consumer_get_type();
#endif /* _LTTNG_CONSUMERD_H */
#include "consumer.h"
+#ifdef __cplusplus
+extern "C" {
+#endif
+
#define LTTNG_CONSUMER_SIG_SWITCH SIGRTMIN + 10
#define LTTNG_CONSUMER_SIG_TEARDOWN SIGRTMIN + 11
#define LTTNG_CONSUMER_SIG_LIVE SIGRTMIN + 12
int consumer_timer_thread_get_channel_monitor_pipe(void);
int consumer_timer_thread_set_channel_monitor_pipe(int fd);
+#ifdef __cplusplus
+}
+#endif
+
#endif /* CONSUMER_TIMER_H */
#include <common/buffer-view.h>
#include <common/dynamic-array.h>
+#ifdef __cplusplus
+extern "C" {
+#endif
+
struct lttng_consumer_local_data;
/* Commands for consumer */
int consumer_metadata_wakeup_pipe(const struct lttng_consumer_channel *channel);
void lttng_consumer_sigbus_handle(void *addr);
+#ifdef __cplusplus
+}
+#endif
+
#endif /* LIB_CONSUMER_H */
projects / lttng-tools.git / commitdiff
