static
int create_exclusion_list_and_validate(const char *event_name,
const char *exclusions_arg,
char ***exclusion_list)
{
int ret = 0;
char **exclusions = NULL;
/* Event name must be a valid globbing pattern to allow exclusions. */
if (!strutils_is_star_glob_pattern(event_name)) {
ERR("Event %s: Exclusions can only be used with a globbing pattern",
event_name);
goto error;
}
/* Split exclusions. */
exclusions = strutils_split(exclusions_arg, ',', true);
if (!exclusions) {
goto error;
}
/*
* If the event name is a star-at-end only globbing pattern,
* then we can validate the individual exclusions. Otherwise
* all exclusions are passed to the session daemon.
*/
if (strutils_is_star_at_the_end_only_glob_pattern(event_name)) {
char * const *exclusion;
for (exclusion = exclusions; *exclusion; exclusion++) {
if (!strutils_is_star_glob_pattern(*exclusion) ||
strutils_is_star_at_the_end_only_glob_pattern(*exclusion)) {
ret = check_exclusion_subsets(event_name, *exclusion);
if (ret) {
goto error;
}
}
}
}
*exclusion_list = exclusions;
goto end;
error:
ret = -1;
strutils_free_null_terminated_array_of_strings(exclusions);
end:
return ret;
}
/*
* Enabling event using the lttng API.
* Note: in case of error only the last error code will be return.
*/
static int enable_events(char *session_name)
{
int ret = CMD_SUCCESS, command_ret = CMD_SUCCESS;
int error_holder = CMD_SUCCESS, warn = 0, error = 0, success = 1;
char *event_name, *channel_name = NULL;
struct lttng_event ev;
struct lttng_domain dom;
int exclusion_count = 0;
char **exclusion_list = NULL;
memset(&ev, 0, sizeof(ev));
memset(&dom, 0, sizeof(dom));
if (opt_kernel) {
if (opt_filter) {
ERR("Filter not implement for kernel tracing yet");
ret = CMD_ERROR;
goto error;
}
if (opt_loglevel) {
WARN("Kernel loglevels are not supported.");
}
}
/* Create lttng domain */
if (opt_kernel) {
dom.type = LTTNG_DOMAIN_KERNEL;
dom.buf_type = LTTNG_BUFFER_GLOBAL;
} else if (opt_userspace) {
dom.type = LTTNG_DOMAIN_UST;
/* Default. */
dom.buf_type = LTTNG_BUFFER_PER_UID;
} else if (opt_jul) {
dom.type = LTTNG_DOMAIN_JUL;
/* Default. */
dom.buf_type = LTTNG_BUFFER_PER_UID;
} else if (opt_log4j) {
dom.type = LTTNG_DOMAIN_LOG4J;
/* Default. */
dom.buf_type = LTTNG_BUFFER_PER_UID;
} else if (opt_python) {
dom.type = LTTNG_DOMAIN_PYTHON;
/* Default. */
dom.buf_type = LTTNG_BUFFER_PER_UID;
} else {
print_missing_domain();
ret = CMD_ERROR;
goto error;
}
if (opt_kernel && opt_exclude) {
ERR("Event name exclusions are not yet implemented for kernel events");
ret = CMD_ERROR;
goto error;
}
channel_name = opt_channel_name;
handle = lttng_create_handle(session_name, &dom);
if (handle == NULL) {
ret = -1;
goto error;
}
/* Prepare Mi */
if (lttng_opt_mi) {
/* Open a events element */
ret = mi_lttng_writer_open_element(writer, config_element_events);
if (ret) {
ret = CMD_ERROR;
goto error;
}
}
if (opt_enable_all) {
/* Default setup for enable all */
if (opt_kernel) {
ev.type = opt_event_type;
ev.name[0] = '\0';
/* kernel loglevels not implemented */
ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
} else {
ev.type = LTTNG_EVENT_TRACEPOINT;
strcpy(ev.name, "*");
ev.loglevel_type = opt_loglevel_type;
if (opt_loglevel) {
assert(opt_userspace || opt_jul || opt_log4j || opt_python);
if (opt_userspace) {
ev.loglevel = loglevel_str_to_value(opt_loglevel);
} else if (opt_jul) {
ev.loglevel = loglevel_jul_str_to_value(opt_loglevel);
} else if (opt_log4j) {
ev.loglevel = loglevel_log4j_str_to_value(opt_loglevel);
} else if (opt_python) {
ev.loglevel = loglevel_python_str_to_value(opt_loglevel);
}
if (ev.loglevel == -1) {
ERR("Unknown loglevel %s", opt_loglevel);
ret = -LTTNG_ERR_INVALID;
goto error;
}
} else {
assert(opt_userspace || opt_jul || opt_log4j || opt_python);
if (opt_userspace) {
ev.loglevel = -1;
} else if (opt_jul || opt_log4j) {
ev.loglevel = LTTNG_LOGLEVEL_JUL_ALL;
} else if (opt_python) {
ev.loglevel = LTTNG_LOGLEVEL_PYTHON_DEBUG;
}
}
}
if (opt_exclude) {
ret = check_exclusion_subsets("*", opt_exclude,
&exclusion_count, &exclusion_list);
if (ret == CMD_ERROR) {
goto error;
}
ev.exclusion = 1;
}
if (!opt_filter) {
ret = lttng_enable_event_with_exclusions(handle,
&ev, channel_name,
NULL,
exclusion_count, exclusion_list);
if (ret < 0) {
switch (-ret) {
case LTTNG_ERR_KERN_EVENT_EXIST:
WARN("Kernel events already enabled (channel %s, session %s)",
print_channel_name(channel_name), session_name);
warn = 1;
break;
case LTTNG_ERR_TRACE_ALREADY_STARTED:
{
const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
ERR("Events: %s (channel %s, session %s)",
msg,
print_channel_name(channel_name),
session_name);
error = 1;
break;
}
default:
ERR("Events: %s (channel %s, session %s)",
lttng_strerror(ret),
ret == -LTTNG_ERR_NEED_CHANNEL_NAME
? print_raw_channel_name(channel_name)
: print_channel_name(channel_name),
session_name);
error = 1;
break;
}
goto end;
}
switch (opt_event_type) {
case LTTNG_EVENT_TRACEPOINT:
if (opt_loglevel && dom.type != LTTNG_DOMAIN_KERNEL) {
char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
if (!exclusion_string) {
PERROR("Cannot allocate exclusion_string");
error = 1;
goto end;
}
MSG("All %s tracepoints%s are enabled in channel %s for loglevel %s",
get_domain_str(dom.type),
exclusion_string,
print_channel_name(channel_name),
opt_loglevel);
free(exclusion_string);
} else {
char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
if (!exclusion_string) {
PERROR("Cannot allocate exclusion_string");
error = 1;
goto end;
}
MSG("All %s tracepoints%s are enabled in channel %s",
get_domain_str(dom.type),
exclusion_string,
print_channel_name(channel_name));
free(exclusion_string);
}
break;
case LTTNG_EVENT_SYSCALL:
if (opt_kernel) {
MSG("All %s system calls are enabled in channel %s",
get_domain_str(dom.type),
print_channel_name(channel_name));
}
break;
case LTTNG_EVENT_ALL:
if (opt_loglevel && dom.type != LTTNG_DOMAIN_KERNEL) {
char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
if (!exclusion_string) {
PERROR("Cannot allocate exclusion_string");
error = 1;
goto end;
}
MSG("All %s events%s are enabled in channel %s for loglevel %s",
get_domain_str(dom.type),
exclusion_string,
print_channel_name(channel_name),
opt_loglevel);
free(exclusion_string);
} else {
char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
if (!exclusion_string) {
PERROR("Cannot allocate exclusion_string");
error = 1;
goto end;
}
MSG("All %s events%s are enabled in channel %s",
get_domain_str(dom.type),
exclusion_string,
print_channel_name(channel_name));
free(exclusion_string);
}
break;
default:
/*
* We should not be here since lttng_enable_event should have
* failed on the event type.
*/
goto error;
}
}
if (opt_filter) {
command_ret = lttng_enable_event_with_exclusions(handle, &ev, channel_name,
opt_filter, exclusion_count, exclusion_list);
if (command_ret < 0) {
switch (-command_ret) {
case LTTNG_ERR_FILTER_EXIST:
WARN("Filter on all events is already enabled"
" (channel %s, session %s)",
print_channel_name(channel_name), session_name);
warn = 1;
break;
case LTTNG_ERR_TRACE_ALREADY_STARTED:
{
const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
ERR("All events: %s (channel %s, session %s, filter \'%s\')",
msg,
print_channel_name(channel_name),
session_name, opt_filter);
error = 1;
break;
}
default:
ERR("All events: %s (channel %s, session %s, filter \'%s\')",
lttng_strerror(command_ret),
command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
? print_raw_channel_name(channel_name)
: print_channel_name(channel_name),
session_name, opt_filter);
error = 1;
break;
}
error_holder = command_ret;
} else {
ev.filter = 1;
MSG("Filter '%s' successfully set", opt_filter);
}
}
if (lttng_opt_mi) {
/* The wildcard * is used for kernel and ust domain to
* represent ALL. We copy * in event name to force the wildcard use
* for kernel domain
*
* Note: this is strictly for semantic and printing while in
* machine interface mode.
*/
strcpy(ev.name, "*");
/* If we reach here the events are enabled */
if (!error && !warn) {
ev.enabled = 1;
} else {
ev.enabled = 0;
success = 0;
}
ret = mi_lttng_event(writer, &ev, 1, handle->domain.type);
if (ret) {
ret = CMD_ERROR;
goto error;
}
/* print exclusion */
ret = mi_print_exclusion(exclusion_count, exclusion_list);
if (ret) {
ret = CMD_ERROR;
goto error;
}
/* Success ? */
ret = mi_lttng_writer_write_element_bool(writer,
mi_lttng_element_command_success, success);
if (ret) {
ret = CMD_ERROR;
goto error;
}
/* Close event element */
ret = mi_lttng_writer_close_element(writer);
if (ret) {
ret = CMD_ERROR;
goto error;
}
}
goto end;
}
/* Strip event list */
event_name = strtok(opt_event_list, ",");
while (event_name != NULL) {
/* Copy name and type of the event */
strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
ev.type = opt_event_type;
/* Kernel tracer action */
if (opt_kernel) {
DBG("Enabling kernel event %s for channel %s",
event_name,
print_channel_name(channel_name));
switch (opt_event_type) {
case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
ev.type = LTTNG_EVENT_TRACEPOINT;
/* Fall-through */
case LTTNG_EVENT_TRACEPOINT:
break;
case LTTNG_EVENT_PROBE:
ret = parse_probe_opts(&ev, opt_probe);
if (ret) {
ERR("Unable to parse probe options");
ret = 0;
goto error;
}
break;
case LTTNG_EVENT_FUNCTION:
ret = parse_probe_opts(&ev, opt_function);
if (ret) {
ERR("Unable to parse function probe options");
ret = 0;
goto error;
}
break;
case LTTNG_EVENT_FUNCTION_ENTRY:
strncpy(ev.attr.ftrace.symbol_name, opt_function_entry_symbol,
LTTNG_SYMBOL_NAME_LEN);
ev.attr.ftrace.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
break;
case LTTNG_EVENT_SYSCALL:
ev.type = LTTNG_EVENT_SYSCALL;
break;
default:
ret = CMD_UNDEFINED;
goto error;
}
/* kernel loglevels not implemented */
ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
} else if (opt_userspace) { /* User-space tracer action */
#if 0
if (opt_cmd_name != NULL || opt_pid) {
MSG("Only supporting tracing all UST processes (-u) for now.");
ret = CMD_UNDEFINED;
goto error;
}
#endif
DBG("Enabling UST event %s for channel %s, loglevel %s", event_name,
print_channel_name(channel_name), opt_loglevel ? : "<all>");
switch (opt_event_type) {
case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
/* Fall-through */
case LTTNG_EVENT_TRACEPOINT:
/* Copy name and type of the event */
ev.type = LTTNG_EVENT_TRACEPOINT;
strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
break;
case LTTNG_EVENT_PROBE:
case LTTNG_EVENT_FUNCTION:
case LTTNG_EVENT_FUNCTION_ENTRY:
case LTTNG_EVENT_SYSCALL:
default:
ERR("Event type not available for user-space tracing");
ret = CMD_UNSUPPORTED;
goto error;
}
if (opt_exclude) {
ev.exclusion = 1;
if (opt_event_type != LTTNG_EVENT_ALL && opt_event_type != LTTNG_EVENT_TRACEPOINT) {
ERR("Exclusion option can only be used with tracepoint events");
ret = CMD_ERROR;
goto error;
}
/* Free previously allocated items */
if (exclusion_list != NULL) {
while (exclusion_count--) {
free(exclusion_list[exclusion_count]);
}
free(exclusion_list);
exclusion_list = NULL;
}
/* Check for proper subsets */
ret = check_exclusion_subsets(event_name, opt_exclude,
&exclusion_count, &exclusion_list);
if (ret == CMD_ERROR) {
goto error;
}
}
ev.loglevel_type = opt_loglevel_type;
if (opt_loglevel) {
ev.loglevel = loglevel_str_to_value(opt_loglevel);
if (ev.loglevel == -1) {
ERR("Unknown loglevel %s", opt_loglevel);
ret = -LTTNG_ERR_INVALID;
goto error;
}
} else {
ev.loglevel = -1;
}
} else if (opt_jul || opt_log4j || opt_python) {
if (opt_event_type != LTTNG_EVENT_ALL &&
opt_event_type != LTTNG_EVENT_TRACEPOINT) {
ERR("Event type not supported for domain.");
ret = CMD_UNSUPPORTED;
goto error;
}
ev.loglevel_type = opt_loglevel_type;
if (opt_loglevel) {
if (opt_jul) {
ev.loglevel = loglevel_jul_str_to_value(opt_loglevel);
} else if (opt_log4j) {
ev.loglevel = loglevel_log4j_str_to_value(opt_loglevel);
} else if (opt_python) {
ev.loglevel = loglevel_python_str_to_value(opt_loglevel);
}
if (ev.loglevel == -1) {
ERR("Unknown loglevel %s", opt_loglevel);
ret = -LTTNG_ERR_INVALID;
goto error;
}
} else {
if (opt_jul) {
ev.loglevel = LTTNG_LOGLEVEL_JUL_ALL;
} else if (opt_log4j) {
ev.loglevel = LTTNG_LOGLEVEL_LOG4J_ALL;
} else if (opt_python) {
ev.loglevel = LTTNG_LOGLEVEL_PYTHON_DEBUG;
}
}
ev.type = LTTNG_EVENT_TRACEPOINT;
strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
} else {
print_missing_domain();
ret = CMD_ERROR;
goto error;
}
if (!opt_filter) {
char *exclusion_string;
command_ret = lttng_enable_event_with_exclusions(handle,
&ev, channel_name,
NULL, exclusion_count, exclusion_list);
exclusion_string = print_exclusions(exclusion_count, exclusion_list);
if (!exclusion_string) {
PERROR("Cannot allocate exclusion_string");
error = 1;
goto end;
}
if (command_ret < 0) {
/* Turn ret to positive value to handle the positive error code */
switch (-command_ret) {
case LTTNG_ERR_KERN_EVENT_EXIST:
WARN("Kernel event %s%s already enabled (channel %s, session %s)",
event_name,
exclusion_string,
print_channel_name(channel_name), session_name);
warn = 1;
break;
case LTTNG_ERR_TRACE_ALREADY_STARTED:
{
const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
ERR("Event %s%s: %s (channel %s, session %s)", event_name,
exclusion_string,
msg,
print_channel_name(channel_name),
session_name);
error = 1;
break;
}
default:
ERR("Event %s%s: %s (channel %s, session %s)", event_name,
exclusion_string,
lttng_strerror(command_ret),
command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
? print_raw_channel_name(channel_name)
: print_channel_name(channel_name),
session_name);
error = 1;
break;
}
error_holder = command_ret;
} else {
/* So we don't print the default channel name for agent domain. */
if (dom.type == LTTNG_DOMAIN_JUL ||
dom.type == LTTNG_DOMAIN_LOG4J) {
MSG("%s event %s%s enabled.",
get_domain_str(dom.type), event_name,
exclusion_string);
} else {
MSG("%s event %s%s created in channel %s",
get_domain_str(dom.type), event_name,
exclusion_string,
print_channel_name(channel_name));
}
}
free(exclusion_string);
}
if (opt_filter) {
char *exclusion_string;
/* Filter present */
ev.filter = 1;
command_ret = lttng_enable_event_with_exclusions(handle, &ev, channel_name,
opt_filter, exclusion_count, exclusion_list);
exclusion_string = print_exclusions(exclusion_count, exclusion_list);
if (!exclusion_string) {
PERROR("Cannot allocate exclusion_string");
error = 1;
goto end;
}
if (command_ret < 0) {
switch (-command_ret) {
case LTTNG_ERR_FILTER_EXIST:
WARN("Filter on event %s%s is already enabled"
" (channel %s, session %s)",
event_name,
exclusion_string,
print_channel_name(channel_name), session_name);
warn = 1;
break;
case LTTNG_ERR_TRACE_ALREADY_STARTED:
{
const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
ERR("Event %s%s: %s (channel %s, session %s, filter \'%s\')", ev.name,
exclusion_string,
msg,
print_channel_name(channel_name),
session_name, opt_filter);
error = 1;
break;
}
default:
ERR("Event %s%s: %s (channel %s, session %s, filter \'%s\')", ev.name,
exclusion_string,
lttng_strerror(command_ret),
command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
? print_raw_channel_name(channel_name)
: print_channel_name(channel_name),
session_name, opt_filter);
error = 1;
break;
}
error_holder = command_ret;
} else {
MSG("Event %s%s: Filter '%s' successfully set",
event_name, exclusion_string,
opt_filter);
}
free(exclusion_string);
}
if (lttng_opt_mi) {
if (command_ret) {
success = 0;
ev.enabled = 0;
} else {
ev.enabled = 1;
}
ret = mi_lttng_event(writer, &ev, 1, handle->domain.type);
if (ret) {
ret = CMD_ERROR;
goto error;
}
/* print exclusion */
ret = mi_print_exclusion(exclusion_count, exclusion_list);
if (ret) {
ret = CMD_ERROR;
goto error;
}
/* Success ? */
ret = mi_lttng_writer_write_element_bool(writer,
mi_lttng_element_command_success, success);
if (ret) {
ret = CMD_ERROR;
goto end;
}
/* Close event element */
ret = mi_lttng_writer_close_element(writer);
if (ret) {
ret = CMD_ERROR;
goto end;
}
}
/* Next event */
event_name = strtok(NULL, ",");
/* Reset warn, error and success */
success = 1;
}
