#include "health-sessiond.h"
#include "testpoint.h"
#include "ust-thread.h"
-#include "jul-thread.h"
+#include "agent-thread.h"
#include "save.h"
#include "load-session-thread.h"
static pid_t ppid; /* Parent PID for --sig-parent option */
static pid_t child_ppid; /* Internal parent PID use with daemonize. */
static char *rundir;
+static int lockfile_fd = -1;
/* Set to 1 when a SIGUSR1 signal is received. */
static int recv_child_signal;
{ "verbose-consumer", 0, 0, 'Z' },
{ "no-kernel", 0, 0, 'N' },
{ "pidfile", 1, 0, 'p' },
- { "jul-tcp-port", 1, 0, 'J' },
+ { "agent-tcp-port", 1, 0, 'J' },
{ "config", 1, 0, 'f' },
{ "load", 1, 0, 'l' },
{ "kmod-probes", 1, 0, 'P' },
static pthread_t dispatch_thread;
static pthread_t health_thread;
static pthread_t ht_cleanup_thread;
-static pthread_t jul_reg_thread;
+static pthread_t agent_reg_thread;
static pthread_t load_session_thread;
/*
/* Application health monitoring */
struct health_app *health_sessiond;
-/* JUL TCP port for registration. Used by the JUL thread. */
-unsigned int jul_tcp_port = DEFAULT_JUL_TCP_PORT;
+/* Agent TCP port for registration. Used by the agent thread. */
+unsigned int agent_tcp_port = DEFAULT_AGENT_TCP_PORT;
/* Am I root or not. */
int is_root; /* Set to 1 if the daemon is running as root */
}
}
+/*
+ * Generate the full lock file path using the rundir.
+ *
+ * Return the snprintf() return value thus a negative value is an error.
+ */
+static int generate_lock_file_path(char *path, size_t len)
+{
+ int ret;
+
+ assert(path);
+ assert(rundir);
+
+ /* Build lockfile path from rundir. */
+ ret = snprintf(path, len, "%s/" DEFAULT_LTTNG_SESSIOND_LOCKFILE, rundir);
+ if (ret < 0) {
+ PERROR("snprintf lockfile path");
+ }
+
+ return ret;
+}
+
/*
* Cleanup the daemon
*/
(void) unlink(path);
snprintf(path, PATH_MAX, "%s/%s", rundir,
- DEFAULT_LTTNG_SESSIOND_JULPORT_FILE);
+ DEFAULT_LTTNG_SESSIOND_AGENTPORT_FILE);
DBG("Removing %s", path);
(void) unlink(path);
DBG("Removing directory %s", path);
(void) rmdir(path);
- /*
- * We do NOT rmdir rundir because there are other processes
- * using it, for instance lttng-relayd, which can start in
- * parallel with this teardown.
- */
-
- free(rundir);
-
DBG("Cleaning up all sessions");
/* Destroy session list mutex */
free(load_info);
}
+ /*
+ * Cleanup lock file by deleting it and finaly closing it which will
+ * release the file system lock.
+ */
+ if (lockfile_fd >= 0) {
+ char lockfile_path[PATH_MAX];
+
+ ret = generate_lock_file_path(lockfile_path, sizeof(lockfile_path));
+ if (ret > 0) {
+ ret = remove(lockfile_path);
+ if (ret < 0) {
+ PERROR("remove lock file");
+ }
+ ret = close(lockfile_fd);
+ if (ret < 0) {
+ PERROR("close lock file");
+ }
+ }
+ }
+
+ /*
+ * We do NOT rmdir rundir because there are other processes
+ * using it, for instance lttng-relayd, which can start in
+ * parallel with this teardown.
+ */
+
+ free(rundir);
+
/* <fun> */
DBG("%c[%d;%dm*** assert failed :-) *** ==> %c[%dm%c[%d;%dm"
"Matthew, BEET driven development works!%c[%dm",
static void *thread_dispatch_ust_registration(void *data)
{
int ret, err = -1;
- struct cds_wfq_node *node;
+ struct cds_wfcq_node *node;
struct ust_command *ust_cmd = NULL;
struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node;
struct ust_reg_wait_queue wait_queue = {
health_code_update();
/* Dequeue command for registration */
- node = cds_wfq_dequeue_blocking(&ust_cmd_queue.queue);
+ node = cds_wfcq_dequeue_blocking(&ust_cmd_queue.head, &ust_cmd_queue.tail);
if (node == NULL) {
DBG("Woken up but nothing in the UST command queue");
/* Continue thread execution */
* Lock free enqueue the registration request. The red pill
* has been taken! This apps will be part of the *system*.
*/
- cds_wfq_enqueue(&ust_cmd_queue.queue, &ust_cmd->node);
+ cds_wfcq_enqueue(&ust_cmd_queue.head, &ust_cmd_queue.tail, &ust_cmd->node);
/*
* Wake the registration queue futex. Implicit memory
- * barrier with the exchange in cds_wfq_enqueue.
+ * barrier with the exchange in cds_wfcq_enqueue.
*/
futex_nto1_wake(&ust_cmd_queue.futex);
}
}
/* 32-bit */
+ pthread_mutex_lock(&ustconsumer32_data.pid_mutex);
if (consumerd32_bin[0] != '\0' &&
ustconsumer32_data.pid == 0 &&
cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) {
fprintf(stderr, " -p, --pidfile FILE Write a pid to FILE name overriding the default value.\n");
fprintf(stderr, " --verbose-consumer Verbose mode for consumer. Activate DBG() macro.\n");
fprintf(stderr, " --no-kernel Disable kernel tracer\n");
- fprintf(stderr, " --jul-tcp-port JUL application registration TCP port\n");
+ fprintf(stderr, " --agent-tcp-port Agent registration TCP port\n");
fprintf(stderr, " -f --config Load daemon configuration file\n");
fprintf(stderr, " -l --load PATH Load session configuration\n");
fprintf(stderr, " --kmod-probes Specify kernel module probes to load\n");
opt_background = 1;
break;
case 'g':
+ /*
+ * If the override option is set, the pointer points to a
+ * *non* const thus freeing it even though the variable type is
+ * set to const.
+ */
+ if (tracing_group_name_override) {
+ free((void *) tracing_group_name);
+ }
tracing_group_name = strdup(arg);
+ if (!tracing_group_name) {
+ perror("strdup");
+ ret = -ENOMEM;
+ }
+ tracing_group_name_override = 1;
break;
case 'h':
usage();
case 'v':
/* Verbose level can increase using multiple -v */
if (arg) {
+ /* Value obtained from config file */
lttng_opt_verbose = config_parse_value(arg);
} else {
- lttng_opt_verbose += 1;
+ /* -v used on command line */
+ lttng_opt_verbose++;
}
+ /* Clamp value to [0, 3] */
+ lttng_opt_verbose = lttng_opt_verbose < 0 ? 0 :
+ (lttng_opt_verbose <= 3 ? lttng_opt_verbose : 3);
break;
case 'Z':
if (arg) {
}
break;
case 'u':
+ if (consumerd32_bin_override) {
+ free((void *) consumerd32_bin);
+ }
consumerd32_bin = strdup(arg);
+ if (!consumerd32_bin) {
+ perror("strdup");
+ ret = -ENOMEM;
+ }
consumerd32_bin_override = 1;
break;
case 'U':
+ if (consumerd32_libdir_override) {
+ free((void *) consumerd32_libdir);
+ }
consumerd32_libdir = strdup(arg);
+ if (!consumerd32_libdir) {
+ perror("strdup");
+ ret = -ENOMEM;
+ }
consumerd32_libdir_override = 1;
break;
case 't':
+ if (consumerd64_bin_override) {
+ free((void *) consumerd64_bin);
+ }
consumerd64_bin = strdup(arg);
+ if (!consumerd64_bin) {
+ perror("strdup");
+ ret = -ENOMEM;
+ }
consumerd64_bin_override = 1;
break;
case 'T':
+ if (consumerd64_libdir_override) {
+ free((void *) consumerd64_libdir);
+ }
consumerd64_libdir = strdup(arg);
+ if (!consumerd64_libdir) {
+ perror("strdup");
+ ret = -ENOMEM;
+ }
consumerd64_libdir_override = 1;
break;
case 'p':
+ free(opt_pidfile);
opt_pidfile = strdup(arg);
+ if (!opt_pidfile) {
+ perror("strdup");
+ ret = -ENOMEM;
+ }
break;
- case 'J': /* JUL TCP port. */
+ case 'J': /* Agent TCP port. */
{
unsigned long v;
errno = 0;
v = strtoul(arg, NULL, 0);
if (errno != 0 || !isdigit(arg[0])) {
- ERR("Wrong value in --jul-tcp-port parameter: %s", arg);
+ ERR("Wrong value in --agent-tcp-port parameter: %s", arg);
return -1;
}
if (v == 0 || v >= 65535) {
- ERR("Port overflow in --jul-tcp-port parameter: %s", arg);
+ ERR("Port overflow in --agent-tcp-port parameter: %s", arg);
return -1;
}
- jul_tcp_port = (uint32_t) v;
- DBG3("JUL TCP port set to non default: %u", jul_tcp_port);
+ agent_tcp_port = (uint32_t) v;
+ DBG3("Agent TCP port set to non default: %u", agent_tcp_port);
break;
}
case 'l':
+ free(opt_load_session_path);
opt_load_session_path = strdup(arg);
if (!opt_load_session_path) {
perror("strdup");
}
break;
case 'P': /* probe modules list */
+ free(kmod_probes_list);
kmod_probes_list = strdup(arg);
+ if (!kmod_probes_list) {
+ perror("strdup");
+ ret = -ENOMEM;
+ }
break;
case 'f':
/* This is handled in set_options() thus silent break. */
}
/*
- * Write JUL TCP port using the rundir.
+ * Create lockfile using the rundir and return its fd.
*/
-static void write_julport(void)
+static int create_lockfile(void)
+{
+ int ret;
+ char lockfile_path[PATH_MAX];
+
+ ret = generate_lock_file_path(lockfile_path, sizeof(lockfile_path));
+ if (ret < 0) {
+ goto error;
+ }
+
+ ret = utils_create_lock_file(lockfile_path);
+error:
+ return ret;
+}
+
+/*
+ * Write agent TCP port using the rundir.
+ */
+static void write_agent_port(void)
{
int ret;
char path[PATH_MAX];
assert(rundir);
ret = snprintf(path, sizeof(path), "%s/"
- DEFAULT_LTTNG_SESSIOND_JULPORT_FILE, rundir);
+ DEFAULT_LTTNG_SESSIOND_AGENTPORT_FILE, rundir);
if (ret < 0) {
- PERROR("snprintf julport path");
+ PERROR("snprintf agent port path");
goto error;
}
/*
- * Create TCP JUL port file in rundir. Return value is of no importance.
+ * Create TCP agent port file in rundir. Return value is of no importance.
* The execution will continue even though we are not able to write the
* file.
*/
- (void) utils_create_pid_file(jul_tcp_port, path);
+ (void) utils_create_pid_file(agent_tcp_port, path);
error:
return;
}
}
+ lockfile_fd = create_lockfile();
+ if (lockfile_fd < 0) {
+ goto error;
+ }
+
/* Set consumer initial state */
kernel_consumerd_state = CONSUMER_STOPPED;
ust_consumerd_state = CONSUMER_STOPPED;
*/
ust_app_ht_alloc();
- /* Initialize JUL domain subsystem. */
- if ((ret = jul_init()) < 0) {
+ /* Initialize agent domain subsystem. */
+ if ((ret = agent_setup()) < 0) {
/* ENOMEM at this point. */
goto error;
}
buffer_reg_init_pid_registry();
/* Init UST command queue. */
- cds_wfq_init(&ust_cmd_queue.queue);
+ cds_wfcq_init(&ust_cmd_queue.head, &ust_cmd_queue.tail);
/*
* Get session list pointer. This pointer MUST NOT be free(). This list is
}
write_pidfile();
- write_julport();
+ write_agent_port();
/* Initialize communication library */
lttcomm_init();
goto exit_apps_notify;
}
- /* Create JUL registration thread. */
- ret = pthread_create(&jul_reg_thread, NULL,
- jul_thread_manage_registration, (void *) NULL);
+ /* Create agent registration thread. */
+ ret = pthread_create(&agent_reg_thread, NULL,
+ agent_thread_manage_registration, (void *) NULL);
if (ret != 0) {
- PERROR("pthread_create JUL");
- goto exit_jul_reg;
+ PERROR("pthread_create agent");
+ goto exit_agent_reg;
}
/* Don't start this thread if kernel tracing is not requested nor root */
}
exit_kernel:
- ret = pthread_join(jul_reg_thread, &status);
+ ret = pthread_join(agent_reg_thread, &status);
if (ret != 0) {
- PERROR("pthread_join JUL");
+ PERROR("pthread_join agent");
goto error; /* join error, exit without cleanup */
}
-exit_jul_reg:
+exit_agent_reg:
ret = pthread_join(apps_notify_thread, &status);
if (ret != 0) {
PERROR("pthread_join apps notify");
projects / lttng-tools.git / blobdiff