/*
* 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;
}
/*
* Adding channel using the lttng API.
*/
static int enable_channel(char *session_name)
{
int ret = CMD_SUCCESS, warn = 0, error = 0, success = 0;
char *channel_name;
struct lttng_domain dom;
memset(&dom, 0, sizeof(dom));
/* Create lttng domain */
if (opt_kernel) {
dom.type = LTTNG_DOMAIN_KERNEL;
dom.buf_type = LTTNG_BUFFER_GLOBAL;
if (opt_buffer_uid || opt_buffer_pid) {
ERR("Buffer type not supported for domain -k");
ret = CMD_ERROR;
goto error;
}
} else if (opt_userspace) {
dom.type = LTTNG_DOMAIN_UST;
if (opt_buffer_pid) {
dom.buf_type = LTTNG_BUFFER_PER_PID;
} else {
if (opt_buffer_global) {
ERR("Buffer type not supported for domain -u");
ret = CMD_ERROR;
goto error;
}
dom.buf_type = LTTNG_BUFFER_PER_UID;
}
} else {
print_missing_domain();
ret = CMD_ERROR;
goto error;
}
set_default_attr(&dom);
if (chan.attr.tracefile_size == 0 && chan.attr.tracefile_count) {
ERR("Missing option --tracefile-size. "
"A file count without a size won't do anything.");
ret = CMD_ERROR;
goto error;
}
if ((chan.attr.tracefile_size > 0) &&
(chan.attr.tracefile_size < chan.attr.subbuf_size)) {
WARN("Tracefile size rounded up from (%" PRIu64 ") to subbuffer size (%" PRIu64 ")",
chan.attr.tracefile_size, chan.attr.subbuf_size);
chan.attr.tracefile_size = chan.attr.subbuf_size;
}
/* Setting channel output */
if (opt_output) {
if (!strncmp(output_mmap, opt_output, strlen(output_mmap))) {
chan.attr.output = LTTNG_EVENT_MMAP;
} else if (!strncmp(output_splice, opt_output, strlen(output_splice))) {
chan.attr.output = LTTNG_EVENT_SPLICE;
} else {
ERR("Unknown output type %s. Possible values are: %s, %s\n",
opt_output, output_mmap, output_splice);
usage(stderr);
ret = CMD_ERROR;
goto error;
}
}
handle = lttng_create_handle(session_name, &dom);
if (handle == NULL) {
ret = -1;
goto error;
}
/* Mi open channels element */
if (lttng_opt_mi) {
assert(writer);
ret = mi_lttng_channels_open(writer);
if (ret) {
ret = CMD_ERROR;
goto error;
}
}
/* Strip channel list (format: chan1,chan2,...) */
channel_name = strtok(opt_channels, ",");
while (channel_name != NULL) {
/* Copy channel name and normalize it */
strncpy(chan.name, channel_name, NAME_MAX);
chan.name[NAME_MAX - 1] = '\0';
DBG("Enabling channel %s", channel_name);
ret = lttng_enable_channel(handle, &chan);
if (ret < 0) {
success = 0;
switch (-ret) {
case LTTNG_ERR_KERN_CHAN_EXIST:
case LTTNG_ERR_UST_CHAN_EXIST:
case LTTNG_ERR_CHAN_EXIST:
WARN("Channel %s: %s (session %s)", channel_name,
lttng_strerror(ret), session_name);
warn = 1;
break;
default:
ERR("Channel %s: %s (session %s)", channel_name,
lttng_strerror(ret), session_name);
error = 1;
break;
}
} else {
MSG("%s channel %s enabled for session %s",
get_domain_str(dom.type), channel_name, session_name);
success = 1;
}
if (lttng_opt_mi) {
/* Mi print the channel element and leave it open */
ret = mi_lttng_channel(writer, &chan, 1);
if (ret) {
ret = CMD_ERROR;
goto error;
}
/* Individual Success ? */
ret = mi_lttng_writer_write_element_bool(writer,
mi_lttng_element_command_success, success);
if (ret) {
ret = CMD_ERROR;
goto error;
}
/* Close channel element */
ret = mi_lttng_writer_close_element(writer);
if (ret) {
ret = CMD_ERROR;
goto error;
}
}
/* Next channel */
channel_name = strtok(NULL, ",");
}
if (lttng_opt_mi) {
/* Close channels element */
ret = mi_lttng_writer_close_element(writer);
if (ret) {
ret = CMD_ERROR;
goto error;
}
}
ret = CMD_SUCCESS;
error:
/* If more important error happen bypass the warning */
if (!ret && warn) {
ret = CMD_WARNING;
}
/* If more important error happen bypass the warning */
if (!ret && error) {
ret = CMD_ERROR;
}
lttng_destroy_handle(handle);
return ret;
}
/*
* disable_events
*
* Disabling event using the lttng API.
*/
static int disable_events(char *session_name)
{
int ret = CMD_SUCCESS, warn = 0, command_ret = CMD_SUCCESS;
int enabled = 1, success = 1;
char *event_name, *channel_name = NULL;
struct lttng_domain dom;
struct lttng_event event;
memset(&dom, 0, sizeof(dom));
/* Create lttng domain */
if (opt_kernel) {
dom.type = LTTNG_DOMAIN_KERNEL;
} else if (opt_userspace) {
dom.type = LTTNG_DOMAIN_UST;
} else if (opt_jul) {
dom.type = LTTNG_DOMAIN_JUL;
} else if (opt_log4j) {
dom.type = LTTNG_DOMAIN_LOG4J;
} else if (opt_python) {
dom.type = LTTNG_DOMAIN_PYTHON;
} else {
print_missing_domain();
ret = CMD_ERROR;
goto error;
}
channel_name = opt_channel_name;
handle = lttng_create_handle(session_name, &dom);
if (handle == NULL) {
ret = -1;
goto error;
}
/* Mi print the channel and open the events element */
if (lttng_opt_mi) {
ret = mi_lttng_writer_open_element(writer, config_element_channel);
if (ret) {
ret = CMD_ERROR;
goto end;
}
ret = mi_lttng_writer_write_element_string(writer,
config_element_name, print_channel_name(channel_name));
if (ret) {
ret = CMD_ERROR;
goto end;
}
/* Open events element */
ret = mi_lttng_writer_open_element(writer, config_element_events);
if (ret) {
ret = CMD_ERROR;
goto end;
}
}
memset(&event, 0, sizeof(event));
switch (opt_event_type) {
case LTTNG_EVENT_SYSCALL:
event.type = LTTNG_EVENT_SYSCALL;
break;
default:
event.type = LTTNG_EVENT_ALL;
break;
}
if (opt_disable_all) {
command_ret = lttng_disable_event_ext(handle, &event, channel_name, NULL);
if (command_ret < 0) {
ERR("%s", lttng_strerror(command_ret));
enabled = 1;
success = 0;
} else {
enabled = 0;
success = 1;
MSG("All %s %s are disabled in channel %s",
get_domain_str(dom.type),
opt_event_type == LTTNG_EVENT_SYSCALL ? "system calls" : "events",
print_channel_name(channel_name));
}
if (lttng_opt_mi) {
ret = mi_print_event("*", enabled, success);
if (ret) {
ret = CMD_ERROR;
goto error;
}
}
} else {
/* Strip event list */
event_name = strtok(opt_event_list, ",");
while (event_name != NULL) {
DBG("Disabling event %s", event_name);
strncpy(event.name, event_name, sizeof(event.name));
event.name[sizeof(event.name) - 1] = '\0';
command_ret = lttng_disable_event_ext(handle, &event, channel_name, NULL);
if (command_ret < 0) {
ERR("%s %s: %s (channel %s, session %s)",
opt_event_type == LTTNG_EVENT_SYSCALL ? "System call" : "Event",
event_name,
lttng_strerror(command_ret),
command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
? print_raw_channel_name(channel_name)
: print_channel_name(channel_name),
session_name);
warn = 1;
success = 0;
/*
* If an error occurred we assume that the event is still
* enabled.
*/
enabled = 1;
} else {
MSG("%s %s %s disabled in channel %s for session %s",
get_domain_str(dom.type),
opt_event_type == LTTNG_EVENT_SYSCALL ? "system call" : "event",
event_name,
print_channel_name(channel_name),
session_name);
success = 1;
enabled = 0;
}
if (lttng_opt_mi) {
ret = mi_print_event(event_name, enabled, success);
if (ret) {
ret = CMD_ERROR;
goto error;
}
}
/* Next event */
event_name = strtok(NULL, ",");
}
}
end:
if (lttng_opt_mi) {
/* Close events element and channel element */
ret = mi_lttng_close_multi_element(writer, 2);
if (ret) {
ret = CMD_ERROR;
}
}
error:
/* if there is already an error preserve it */
if (warn && !ret) {
ret = CMD_WARNING;
}
/* Overwrite ret if an error occurred */
ret = command_ret ? command_ret : ret;
lttng_destroy_handle(handle);
return ret;
}
