#include "save.h"
#include "load-session-thread.h"
#include "syscall.h"
+#include "agent.h"
#define CONSUMERD_FILE "lttng-consumerd"
/* Command line options */
static const struct option long_options[] = {
- { "client-sock", 1, 0, 'c' },
- { "apps-sock", 1, 0, 'a' },
- { "kconsumerd-cmd-sock", 1, 0, 'C' },
- { "kconsumerd-err-sock", 1, 0, 'E' },
- { "ustconsumerd32-cmd-sock", 1, 0, 'G' },
- { "ustconsumerd32-err-sock", 1, 0, 'H' },
- { "ustconsumerd64-cmd-sock", 1, 0, 'D' },
- { "ustconsumerd64-err-sock", 1, 0, 'F' },
- { "consumerd32-path", 1, 0, 'u' },
- { "consumerd32-libdir", 1, 0, 'U' },
- { "consumerd64-path", 1, 0, 't' },
- { "consumerd64-libdir", 1, 0, 'T' },
- { "daemonize", 0, 0, 'd' },
- { "background", 0, 0, 'b' },
- { "sig-parent", 0, 0, 'S' },
- { "help", 0, 0, 'h' },
- { "group", 1, 0, 'g' },
- { "version", 0, 0, 'V' },
- { "quiet", 0, 0, 'q' },
- { "verbose", 0, 0, 'v' },
- { "verbose-consumer", 0, 0, 'Z' },
- { "no-kernel", 0, 0, 'N' },
- { "pidfile", 1, 0, 'p' },
- { "agent-tcp-port", 1, 0, 'J' },
- { "config", 1, 0, 'f' },
- { "load", 1, 0, 'l' },
- { "kmod-probes", 1, 0, 'P' },
- { "extra-kmod-probes", 1, 0, 'e' },
+ { "client-sock", required_argument, 0, 'c' },
+ { "apps-sock", required_argument, 0, 'a' },
+ { "kconsumerd-cmd-sock", required_argument, 0, '\0' },
+ { "kconsumerd-err-sock", required_argument, 0, '\0' },
+ { "ustconsumerd32-cmd-sock", required_argument, 0, '\0' },
+ { "ustconsumerd32-err-sock", required_argument, 0, '\0' },
+ { "ustconsumerd64-cmd-sock", required_argument, 0, '\0' },
+ { "ustconsumerd64-err-sock", required_argument, 0, '\0' },
+ { "consumerd32-path", required_argument, 0, '\0' },
+ { "consumerd32-libdir", required_argument, 0, '\0' },
+ { "consumerd64-path", required_argument, 0, '\0' },
+ { "consumerd64-libdir", required_argument, 0, '\0' },
+ { "daemonize", no_argument, 0, 'd' },
+ { "background", no_argument, 0, 'b' },
+ { "sig-parent", no_argument, 0, 'S' },
+ { "help", no_argument, 0, 'h' },
+ { "group", required_argument, 0, 'g' },
+ { "version", no_argument, 0, 'V' },
+ { "quiet", no_argument, 0, 'q' },
+ { "verbose", no_argument, 0, 'v' },
+ { "verbose-consumer", no_argument, 0, '\0' },
+ { "no-kernel", no_argument, 0, '\0' },
+ { "pidfile", required_argument, 0, 'p' },
+ { "agent-tcp-port", required_argument, 0, '\0' },
+ { "config", required_argument, 0, 'f' },
+ { "load", required_argument, 0, 'l' },
+ { "kmod-probes", required_argument, 0, '\0' },
+ { "extra-kmod-probes", required_argument, 0, '\0' },
{ NULL, 0, 0, 0 }
};
/* Load session thread information to operate. */
struct load_session_thread_data *load_info;
+/* Global hash tables */
+struct lttng_ht *agent_apps_ht_by_sock = NULL;
+
/*
* Whether sessiond is ready for commands/health check requests.
* NR_LTTNG_SESSIOND_READY must match the number of calls to
}
}
+ DBG("Cleaning up all agent apps");
+ agent_app_ht_clean();
+
DBG("Closing all UST sockets");
ust_app_clean_list();
buffer_reg_destroy_registries();
/* For all tracing session(s) */
cds_list_for_each_entry_safe(sess, stmp, &session_list_ptr->head, list) {
+ struct ust_app *app;
+
session_lock(sess);
- if (sess->ust_session) {
- ust_app_global_update(sess->ust_session, app_sock);
+ if (!sess->ust_session) {
+ goto unlock_session;
}
+
+ rcu_read_lock();
+ assert(app_sock >= 0);
+ app = ust_app_find_by_sock(app_sock);
+ if (app == NULL) {
+ /*
+ * Application can be unregistered before so
+ * this is possible hence simply stopping the
+ * update.
+ */
+ DBG3("UST app update failed to find app sock %d",
+ app_sock);
+ goto unlock_rcu;
+ }
+ ust_app_global_update(sess->ust_session, app);
+ unlock_rcu:
+ rcu_read_unlock();
+ unlock_session:
session_unlock(sess);
}
}
DBG("[thread] Manage consumer started");
+ rcu_register_thread();
+ rcu_thread_online();
+
health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CONSUMER);
health_code_update();
health_unregister(health_sessiond);
DBG("consumer thread cleanup completed");
+ rcu_thread_offline();
+ rcu_unregister_thread();
+
return NULL;
}
free(wait_node);
}
+ /* Empty command queue. */
+ for (;;) {
+ /* Dequeue command for registration */
+ node = cds_wfcq_dequeue_blocking(&ust_cmd_queue.head, &ust_cmd_queue.tail);
+ if (node == NULL) {
+ break;
+ }
+ ust_cmd = caa_container_of(node, struct ust_command, node);
+ ret = close(ust_cmd->sock);
+ if (ret < 0) {
+ PERROR("close ust sock exit dispatch %d", ust_cmd->sock);
+ }
+ lttng_fd_put(LTTNG_FD_APPS, 1);
+ free(ust_cmd);
+ }
+
error_testpoint:
DBG("Dispatch thread dying");
if (err) {
ust_cmd = zmalloc(sizeof(struct ust_command));
if (ust_cmd == NULL) {
PERROR("ust command zmalloc");
+ ret = close(sock);
+ if (ret) {
+ PERROR("close");
+ }
goto error;
}
* domain.
*/
if (session->kernel_session->consumer) {
- consumer_destroy_output(session->kernel_session->consumer);
+ consumer_output_put(session->kernel_session->consumer);
}
session->kernel_session->consumer =
consumer_copy_output(session->consumer);
case LTTNG_DOMAIN_UST:
DBG3("Copying tracing session consumer output in UST session");
if (session->ust_session->consumer) {
- consumer_destroy_output(session->ust_session->consumer);
+ consumer_output_put(session->ust_session->consumer);
}
session->ust_session->consumer =
consumer_copy_output(session->consumer);
session->kernel_session->consumer->dst.trace_path,
S_IRWXU | S_IRWXG, session->uid, session->gid);
if (ret < 0) {
- if (ret != -EEXIST) {
+ if (errno != EEXIST) {
ERR("Trace directory creation error");
goto error;
}
case LTTNG_LIST_CHANNELS:
case LTTNG_LIST_EVENTS:
case LTTNG_LIST_SYSCALLS:
+ case LTTNG_LIST_TRACKER_PIDS:
break;
default:
/* Setup lttng message with no payload */
}
case LTTNG_DISABLE_EVENT:
{
+
+ /*
+ * FIXME: handle filter; for now we just receive the filter's
+ * bytecode along with the filter expression which are sent by
+ * liblttng-ctl and discard them.
+ *
+ * This fixes an issue where the client may block while sending
+ * the filter payload and encounter an error because the session
+ * daemon closes the socket without ever handling this data.
+ */
+ size_t count = cmd_ctx->lsm->u.disable.expression_len +
+ cmd_ctx->lsm->u.disable.bytecode_len;
+
+ if (count) {
+ char data[LTTNG_FILTER_MAX_LEN];
+
+ DBG("Discarding disable event command payload of size %zu", count);
+ while (count) {
+ ret = lttcomm_recv_unix_sock(sock, data,
+ count > sizeof(data) ? sizeof(data) : count);
+ if (ret < 0) {
+ goto error;
+ }
+
+ count -= (size_t) ret;
+ }
+ }
/* FIXME: passing packed structure to non-packed pointer */
- /* TODO: handle filter */
ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type,
cmd_ctx->lsm->u.disable.channel_name,
&cmd_ctx->lsm->u.disable.event);
&cmd_ctx->lsm->u.channel.chan, kernel_poll_pipe[1]);
break;
}
+ case LTTNG_TRACK_PID:
+ {
+ ret = cmd_track_pid(cmd_ctx->session,
+ cmd_ctx->lsm->domain.type,
+ cmd_ctx->lsm->u.pid_tracker.pid);
+ break;
+ }
+ case LTTNG_UNTRACK_PID:
+ {
+ ret = cmd_untrack_pid(cmd_ctx->session,
+ cmd_ctx->lsm->domain.type,
+ cmd_ctx->lsm->u.pid_tracker.pid);
+ break;
+ }
case LTTNG_ENABLE_EVENT:
{
struct lttng_event_exclusion *exclusion = NULL;
ret = LTTNG_OK;
break;
}
+ case LTTNG_LIST_TRACKER_PIDS:
+ {
+ int32_t *pids = NULL;
+ ssize_t nr_pids;
+
+ nr_pids = cmd_list_tracker_pids(cmd_ctx->session,
+ cmd_ctx->lsm->domain.type, &pids);
+ if (nr_pids < 0) {
+ /* Return value is a negative lttng_error_code. */
+ ret = -nr_pids;
+ goto error;
+ }
+
+ /*
+ * Setup lttng message with payload size set to the event list size in
+ * bytes and then copy list into the llm payload.
+ */
+ ret = setup_lttng_msg(cmd_ctx, sizeof(int32_t) * nr_pids);
+ if (ret < 0) {
+ free(pids);
+ goto setup_error;
+ }
+
+ /* Copy event list into message payload */
+ memcpy(cmd_ctx->llm->payload, pids,
+ sizeof(int) * nr_pids);
+
+ free(pids);
+
+ ret = LTTNG_OK;
+ break;
+ }
case LTTNG_SET_CONSUMER_URI:
{
size_t nb_uri, len;
}
case LTTNG_DATA_PENDING:
{
- ret = cmd_data_pending(cmd_ctx->session);
+ int pending_ret;
+
+ /* 1 byte to return whether or not data is pending */
+ ret = setup_lttng_msg(cmd_ctx, 1);
+ if (ret < 0) {
+ goto setup_error;
+ }
+
+ pending_ret = cmd_data_pending(cmd_ctx->session);
+ /*
+ * FIXME
+ *
+ * This function may returns 0 or 1 to indicate whether or not
+ * there is data pending. In case of error, it should return an
+ * LTTNG_ERR code. However, some code paths may still return
+ * a nondescript error code, which we handle by returning an
+ * "unknown" error.
+ */
+ if (pending_ret == 0 || pending_ret == 1) {
+ ret = LTTNG_OK;
+ } else if (pending_ret < 0) {
+ ret = LTTNG_ERR_UNK;
+ goto setup_error;
+ } else {
+ ret = pending_ret;
+ goto setup_error;
+ }
+
+ *cmd_ctx->llm->payload = (uint8_t) pending_ret;
break;
}
case LTTNG_SNAPSHOT_ADD_OUTPUT:
health_code_update();
- DBG("Sending response (size: %d, retcode: %s)",
+ DBG("Sending response (size: %d, retcode: %s (%d))",
cmd_ctx->lttng_msg_size,
- lttng_strerror(-cmd_ctx->llm->ret_code));
+ lttng_strerror(-cmd_ctx->llm->ret_code),
+ cmd_ctx->llm->ret_code);
ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size);
if (ret < 0) {
ERR("Failed to send data back to client");
fprintf(stderr, " --extra-kmod-probes Specify extra kernel module probes to load\n");
}
+static int string_match(const char *str1, const char *str2)
+{
+ return (str1 && str2) && !strcmp(str1, str2);
+}
+
/*
* Take an option from the getopt output and set it in the right variable to be
* used later.
goto end;
}
- switch (opt) {
- case 0:
- fprintf(stderr, "option %s", optname);
- if (arg) {
- fprintf(stderr, " with arg %s\n", arg);
- }
- break;
- case 'c':
+ if (string_match(optname, "client-sock") || opt == 'c') {
if (lttng_is_setuid_setgid()) {
WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
"-c, --client-sock");
} else {
snprintf(client_unix_sock_path, PATH_MAX, "%s", arg);
}
- break;
- case 'a':
+ } else if (string_match(optname, "apps-sock") || opt == 'a') {
if (lttng_is_setuid_setgid()) {
WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
"-a, --apps-sock");
} else {
snprintf(apps_unix_sock_path, PATH_MAX, "%s", arg);
}
- break;
- case 'd':
+ } else if (string_match(optname, "daemonize") || opt == 'd') {
opt_daemon = 1;
- break;
- case 'b':
+ } else if (string_match(optname, "background") || opt == 'b') {
opt_background = 1;
- break;
- case 'g':
+ } else if (string_match(optname, "group") || opt == 'g') {
if (lttng_is_setuid_setgid()) {
WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
"-g, --group");
}
tracing_group_name_override = 1;
}
- break;
- case 'h':
+ } else if (string_match(optname, "help") || opt == 'h') {
usage();
exit(EXIT_SUCCESS);
- case 'V':
+ } else if (string_match(optname, "version") || opt == 'V') {
fprintf(stdout, "%s\n", VERSION);
exit(EXIT_SUCCESS);
- case 'S':
+ } else if (string_match(optname, "sig-parent") || opt == 'S') {
opt_sig_parent = 1;
- break;
- case 'E':
+ } else if (string_match(optname, "kconsumerd-err-sock")) {
if (lttng_is_setuid_setgid()) {
WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
"--kconsumerd-err-sock");
} else {
snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, "%s", arg);
}
- break;
- case 'C':
+ } else if (string_match(optname, "kconsumerd-cmd-sock")) {
if (lttng_is_setuid_setgid()) {
WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
"--kconsumerd-cmd-sock");
} else {
snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, "%s", arg);
}
- break;
- case 'F':
+ } else if (string_match(optname, "ustconsumerd64-err-sock")) {
if (lttng_is_setuid_setgid()) {
WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
"--ustconsumerd64-err-sock");
} else {
snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, "%s", arg);
}
- break;
- case 'D':
+ } else if (string_match(optname, "ustconsumerd64-cmd-sock")) {
if (lttng_is_setuid_setgid()) {
WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
"--ustconsumerd64-cmd-sock");
} else {
snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, "%s", arg);
}
- break;
- case 'H':
+ } else if (string_match(optname, "ustconsumerd32-err-sock")) {
if (lttng_is_setuid_setgid()) {
WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
"--ustconsumerd32-err-sock");
} else {
snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, "%s", arg);
}
- break;
- case 'G':
+ } else if (string_match(optname, "ustconsumerd32-cmd-sock")) {
if (lttng_is_setuid_setgid()) {
WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
"--ustconsumerd32-cmd-sock");
} else {
snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, "%s", arg);
}
- break;
- case 'N':
+ } else if (string_match(optname, "no-kernel")) {
opt_no_kernel = 1;
- break;
- case 'q':
+ } else if (string_match(optname, "quiet") || opt == 'q') {
lttng_opt_quiet = 1;
- break;
- case 'v':
+ } else if (string_match(optname, "verbose") || opt == 'v') {
/* Verbose level can increase using multiple -v */
if (arg) {
/* Value obtained from config file */
/* Clamp value to [0, 3] */
lttng_opt_verbose = lttng_opt_verbose < 0 ? 0 :
(lttng_opt_verbose <= 3 ? lttng_opt_verbose : 3);
- break;
- case 'Z':
+ } else if (string_match(optname, "verbose-consumer")) {
if (arg) {
opt_verbose_consumer = config_parse_value(arg);
} else {
opt_verbose_consumer += 1;
}
- break;
- case 'u':
+ } else if (string_match(optname, "consumerd32-path")) {
if (lttng_is_setuid_setgid()) {
WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
"--consumerd32-path");
}
consumerd32_bin_override = 1;
}
- break;
- case 'U':
+ } else if (string_match(optname, "consumerd32-libdir")) {
if (lttng_is_setuid_setgid()) {
WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
"--consumerd32-libdir");
}
consumerd32_libdir_override = 1;
}
- break;
- case 't':
+ } else if (string_match(optname, "consumerd64-path")) {
if (lttng_is_setuid_setgid()) {
WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
"--consumerd64-path");
}
consumerd64_bin_override = 1;
}
- break;
- case 'T':
+ } else if (string_match(optname, "consumerd64-libdir")) {
if (lttng_is_setuid_setgid()) {
WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
"--consumerd64-libdir");
}
consumerd64_libdir_override = 1;
}
- break;
- case 'p':
+ } else if (string_match(optname, "pidfile") || opt == 'p') {
if (lttng_is_setuid_setgid()) {
WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
"-p, --pidfile");
ret = -ENOMEM;
}
}
- break;
- case 'J': /* Agent TCP port. */
- {
+ } else if (string_match(optname, "agent-tcp-port")) {
if (lttng_is_setuid_setgid()) {
WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
"--agent-tcp-port");
agent_tcp_port = (uint32_t) v;
DBG3("Agent TCP port set to non default: %u", agent_tcp_port);
}
- break;
- }
- case 'l':
+ } else if (string_match(optname, "load") || opt == 'l') {
if (lttng_is_setuid_setgid()) {
WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
"-l, --load");
ret = -ENOMEM;
}
}
- break;
- case 'P': /* probe modules list */
+ } else if (string_match(optname, "kmod-probes")) {
if (lttng_is_setuid_setgid()) {
WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
"--kmod-probes");
ret = -ENOMEM;
}
}
- break;
- case 'e':
+ } else if (string_match(optname, "extra-kmod-probes")) {
if (lttng_is_setuid_setgid()) {
WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
"--extra-kmod-probes");
ret = -ENOMEM;
}
}
- break;
- case 'f':
- /* This is handled in set_options() thus silent break. */
- break;
- default:
+ } else if (string_match(optname, "config") || opt == 'f') {
+ /* This is handled in set_options() thus silent skip. */
+ goto end;
+ } else {
/* Unknown option or other error.
* Error is printed by getopt, just return */
ret = -1;
optopt = orig_optopt;
optind = orig_optind;
while (1) {
- c = getopt_long(argc, argv, optstring, long_options, &option_index);
+ option_index = -1;
+ /*
+ * getopt_long() will not set option_index if it encounters a
+ * short option.
+ */
+ c = getopt_long(argc, argv, optstring, long_options,
+ &option_index);
if (c == -1) {
break;
}
- ret = set_option(c, optarg, long_options[option_index].name);
+ /*
+ * Pass NULL as the long option name if popt left the index
+ * unset.
+ */
+ ret = set_option(c, optarg,
+ option_index < 0 ? NULL :
+ long_options[option_index].name);
if (ret < 0) {
break;
}
* cleanup() can get called after that point.
*/
if (ust_app_ht_alloc()) {
+ ERR("Failed to allocate UST app hash table");
retval = -1;
goto exit_init_data;
}
- /* Initialize agent domain subsystem. */
- if (agent_setup()) {
- /* ENOMEM at this point. */
+ /*
+ * Initialize agent app hash table. We allocate the hash table here
+ * since cleanup() can get called after this point.
+ */
+ if (agent_app_ht_alloc()) {
+ ERR("Failed to allocate Agent app hash table");
retval = -1;
goto exit_init_data;
}
}
exit_reg_apps:
+ /*
+ * Join dispatch thread after joining reg_apps_thread to ensure
+ * we don't leak applications in the queue.
+ */
ret = pthread_join(dispatch_thread, &status);
if (ret) {
errno = ret;
projects / lttng-tools.git / blobdiff