/*
* Machine interface
* Print a list of channel
*
*/
static int mi_list_channels(struct lttng_channel *channels, int count,
const char *channel_name)
{
int i, ret;
unsigned int chan_found = 0;
/* Open channels element */
ret = mi_lttng_channels_open(writer);
if (ret) {
goto error;
}
for (i = 0; i < count; i++) {
if (channel_name != NULL) {
if (strncmp(channels[i].name, channel_name, NAME_MAX) == 0) {
chan_found = 1;
} else {
continue;
}
}
/* Write channel element and leave it open */
ret = mi_lttng_channel(writer, &channels[i], 1);
if (ret) {
goto error;
}
/* Listing events per channel */
ret = list_events(channels[i].name);
if (ret) {
goto error;
}
/* Closing the channel element we opened earlier */
ret = mi_lttng_writer_close_element(writer);
if (ret) {
goto error;
}
if (chan_found) {
break;
}
}
/* Close channels element */
ret = mi_lttng_writer_close_element(writer);
if (ret) {
goto error;
}
error:
return ret;
}
LTTNG_HIDDEN
int mi_lttng_pid(struct mi_writer *writer, pid_t pid , const char *cmdline,
int is_open)
{
int ret;
/* Open element pid */
ret = mi_lttng_writer_open_element(writer, mi_lttng_element_pid);
if (ret) {
goto end;
}
/* Writing pid number */
ret = mi_lttng_writer_write_element_signed_int(writer,
mi_lttng_element_pid_id, (int)pid);
if (ret) {
goto end;
}
/* Writing name of the process */
ret = mi_lttng_writer_write_element_string(writer, config_element_name,
cmdline);
if (ret) {
goto end;
}
if (!is_open) {
/* Closing Pid */
ret = mi_lttng_writer_close_element(writer);
}
end:
return ret;
}
static
int mi_lttng_app_context(struct mi_writer *writer,
const char *provider_name, const char *ctx_name)
{
int ret;
/* Open app */
ret = mi_lttng_writer_open_element(writer,
config_element_context_app);
if (ret) {
goto end;
}
/* provider_name */
ret = mi_lttng_writer_write_element_string(writer,
config_element_context_app_provider_name,
provider_name);
if (ret) {
goto end;
}
/* ctx_name */
ret = mi_lttng_writer_write_element_string(writer,
config_element_context_app_ctx_name, ctx_name);
if (ret) {
goto end;
}
/* Close app */
ret = mi_lttng_writer_close_element(writer);
end:
return ret;
}
/*
* Machine interface
* List all availables session
*/
static int mi_list_sessions(struct lttng_session *sessions, int count)
{
int ret, i;
/* Opening sessions element */
ret = mi_lttng_sessions_open(writer);
if (ret) {
goto end;
}
/* Listing sessions */
for (i = 0; i < count; i++) {
ret = mi_lttng_session(writer, &sessions[i], 0);
if (ret) {
goto end;
}
}
/* Closing sessions element */
ret = mi_lttng_writer_close_element(writer);
if (ret) {
goto end;
}
end:
return ret;
}
/*
* Mi print of partial session
*/
static int mi_print_session(char *session_name, int enabled)
{
int ret;
assert(writer);
assert(session_name);
/* Open session element */
ret = mi_lttng_writer_open_element(writer, config_element_session);
if (ret) {
goto end;
}
/* Print session name element */
ret = mi_lttng_writer_write_element_string(writer, config_element_name,
session_name);
if (ret) {
goto end;
}
/* Is enabled ? */
ret = mi_lttng_writer_write_element_bool(writer, config_element_enabled,
enabled);
if (ret) {
goto end;
}
/* Close session element */
ret = mi_lttng_writer_close_element(writer);
end:
return ret;
}
/*
* Machine interface
* Print a list of system calls.
*/
static int mi_list_syscalls(struct lttng_event *events, int count)
{
int ret, i;
/* Open events */
ret = mi_lttng_events_open(writer);
if (ret) {
goto end;
}
for (i = 0; i < count; i++) {
ret = mi_lttng_event(writer, &events[i], 0, handle->domain.type);
if (ret) {
goto end;
}
}
/* Close events. */
ret = mi_lttng_writer_close_element(writer);
if (ret) {
goto end;
}
end:
return ret;
}
/*
* Mi print exlcusion list
*/
static
int mi_print_exclusion(char **names)
{
int i, ret;
int count = names ? strutils_array_of_strings_len(names) : 0;
assert(writer);
if (count == 0) {
ret = 0;
goto end;
}
ret = mi_lttng_writer_open_element(writer, config_element_exclusions);
if (ret) {
goto end;
}
for (i = 0; i < count; i++) {
ret = mi_lttng_writer_write_element_string(writer,
config_element_exclusion, names[i]);
if (ret) {
goto end;
}
}
/* Close exclusions element */
ret = mi_lttng_writer_close_element(writer);
end:
return ret;
}
/*
* List all tracker of a domain
*/
static int list_trackers(void)
{
int ret;
/* Trackers listing */
if (lttng_opt_mi) {
ret = mi_lttng_trackers_open(writer);
if (ret) {
goto end;
}
}
/* pid tracker */
ret = list_tracker_pids();
if (ret) {
goto end;
}
if (lttng_opt_mi) {
/* Close trackers element */
ret = mi_lttng_writer_close_element(writer);
if (ret) {
goto end;
}
}
end:
return ret;
}
LTTNG_HIDDEN
int mi_lttng_session(struct mi_writer *writer,
struct lttng_session *session, int is_open)
{
int ret;
assert(session);
/* Open sessions element */
ret = mi_lttng_writer_open_element(writer,
config_element_session);
if (ret) {
goto end;
}
/* Name of the session */
ret = mi_lttng_writer_write_element_string(writer,
config_element_name, session->name);
if (ret) {
goto end;
}
/* Path */
ret = mi_lttng_writer_write_element_string(writer,
config_element_path, session->path);
if (ret) {
goto end;
}
/* Enabled ? */
ret = mi_lttng_writer_write_element_bool(writer,
config_element_enabled, session->enabled);
if (ret) {
goto end;
}
/* Snapshot mode */
ret = mi_lttng_writer_write_element_unsigned_int(writer,
config_element_snapshot_mode, session->snapshot_mode);
if (ret) {
goto end;
}
/* Live timer interval in usec */
ret = mi_lttng_writer_write_element_unsigned_int(writer,
config_element_live_timer_interval,
session->live_timer_interval);
if (ret) {
goto end;
}
if (!is_open) {
/* Closing session element */
ret = mi_lttng_writer_close_element(writer);
}
end:
return ret;
}
static int mi_list_output(void)
{
int ret;
struct lttng_snapshot_output *s_iter;
struct lttng_snapshot_output_list *list;
assert(writer);
ret = lttng_snapshot_list_output(current_session_name, &list);
if (ret < 0) {
goto error;
}
ret = mi_lttng_snapshot_output_session_name(writer, current_session_name);
if (ret) {
ret = CMD_ERROR;
goto end;
}
while ((s_iter = lttng_snapshot_output_list_get_next(list)) != NULL) {
ret = mi_lttng_snapshot_list_output(writer, s_iter);
if (ret) {
ret = CMD_ERROR;
goto end;
}
}
/* Close snapshot snapshots element */
ret = mi_lttng_writer_close_element(writer);
if (ret) {
ret = CMD_ERROR;
goto end;
}
/* Close snapshot session element */
ret = mi_lttng_writer_close_element(writer);
if (ret) {
ret = CMD_ERROR;
}
end:
lttng_snapshot_output_list_destroy(list);
error:
return ret;
}
static int write_event_exclusions(struct mi_writer *writer,
struct lttng_event *event)
{
int i;
int ret;
int exclusion_count;
/* Open event exclusions */
ret = mi_lttng_writer_open_element(writer, config_element_exclusions);
if (ret) {
goto end;
}
exclusion_count = lttng_event_get_exclusion_name_count(event);
if (exclusion_count < 0) {
ret = exclusion_count;
goto end;
}
for (i = 0; i < exclusion_count; i++) {
const char *name;
ret = lttng_event_get_exclusion_name(event, i, &name);
if (ret) {
/* Close exclusions */
mi_lttng_writer_close_element(writer);
goto end;
}
ret = mi_lttng_writer_write_element_string(writer,
config_element_exclusion, name);
if (ret) {
/* Close exclusions */
mi_lttng_writer_close_element(writer);
goto end;
}
}
/* Close exclusions */
ret = mi_lttng_writer_close_element(writer);
end:
return ret;
}
LTTNG_HIDDEN
int mi_lttng_snapshot_add_output(struct mi_writer *writer,
const char *current_session_name, const char *n_ptr,
struct lttng_snapshot_output *output)
{
int ret;
/* Open element snapshot */
ret = mi_lttng_writer_open_element(writer,
mi_lttng_element_command_snapshot);
if (ret) {
goto end;
}
/* Snapshot output id */
ret = mi_lttng_writer_write_element_unsigned_int(writer,
mi_lttng_element_id, output->id);
if (ret) {
goto end;
}
/* Snapshot output names */
ret = mi_lttng_writer_write_element_string(writer,
config_element_name, n_ptr);
if (ret) {
goto end;
}
/* Destination of the output (ctrl_url)*/
ret = mi_lttng_writer_write_element_string(writer,
mi_lttng_element_snapshot_ctrl_url, output->ctrl_url);
if (ret) {
goto end;
}
/* Snapshot added for session "current_session_name"*/
ret = mi_lttng_writer_write_element_string(writer,
mi_lttng_element_snapshot_session_name, current_session_name);
if (ret) {
goto end;
}
/* total size of all stream combined */
ret = mi_lttng_writer_write_element_unsigned_int(writer,
mi_lttng_element_snapshot_max_size, output->max_size);
if (ret) {
goto end;
}
/* Close snapshot element */
ret = mi_lttng_writer_close_element(writer);
end:
return ret;
}
LTTNG_HIDDEN
int mi_lttng_snapshot_list_output(struct mi_writer *writer,
struct lttng_snapshot_output *output)
{
int ret;
/* Open element snapshot output */
ret = mi_lttng_writer_open_element(writer,
mi_lttng_element_command_snapshot);
if (ret) {
goto end;
}
/* ID of the snapshot output */
ret = mi_lttng_writer_write_element_unsigned_int(writer,
mi_lttng_element_id, output->id);
if (ret) {
goto end;
}
/* Name of the output */
ret = mi_lttng_writer_write_element_string(writer, config_element_name,
output->name);
if (ret) {
goto end;
}
/* Destination of the output (ctrl_url)*/
ret = mi_lttng_writer_write_element_string(writer,
mi_lttng_element_snapshot_ctrl_url, output->ctrl_url);
if (ret) {
goto end;
}
/* Destination of the output (data_url) */
ret = mi_lttng_writer_write_element_string(writer,
mi_lttng_element_snapshot_data_url, output->data_url);
if (ret) {
goto end;
}
/* total size of all stream combined */
ret = mi_lttng_writer_write_element_unsigned_int(writer,
mi_lttng_element_snapshot_max_size, output->max_size);
if (ret) {
goto end;
}
/* Close snapshot output element */
ret = mi_lttng_writer_close_element(writer);
end:
return ret;
}
LTTNG_HIDDEN
int mi_lttng_snapshot_del_output(struct mi_writer *writer, int id,
const char *name, const char *current_session_name)
{
int ret;
/* Open element del_snapshot */
ret = mi_lttng_writer_open_element(writer,
mi_lttng_element_command_snapshot);
if (ret) {
goto end;
}
if (id != UINT32_MAX) {
/* "Snapshot output "id" successfully deleted
* for "current_session_name"
* ID of the snapshot output
*/
ret = mi_lttng_writer_write_element_unsigned_int(writer,
mi_lttng_element_id, id);
if (ret) {
goto end;
}
} else {
/* "Snapshot output "name" successfully deleted
* for session "current_session_name"
* Name of the output
*/
ret = mi_lttng_writer_write_element_string(writer, config_element_name,
name);
if (ret) {
goto end;
}
}
/* Snapshot was deleted for session "current_session_name"*/
ret = mi_lttng_writer_write_element_string(writer,
mi_lttng_element_snapshot_session_name,
current_session_name);
if (ret) {
goto end;
}
/* Close snapshot element */
ret = mi_lttng_writer_close_element(writer);
end:
return ret;
}
LTTNG_HIDDEN
int mi_lttng_event_field(struct mi_writer *writer,
struct lttng_event_field *field)
{
int ret;
if (!field->field_name[0]) {
ret = 0;
goto end;
}
/* Open field */
ret = mi_lttng_writer_open_element(writer, mi_lttng_element_event_field);
if (ret) {
goto end;
}
if (!field->field_name[0]) {
goto close;
}
/* Name */
ret = mi_lttng_writer_write_element_string(writer, config_element_name,
field->field_name);
if (ret) {
goto end;
}
/* Type */
ret = mi_lttng_writer_write_element_string(writer, config_element_type,
mi_lttng_eventfieldtype_string(field->type));
if (ret) {
goto end;
}
/* nowrite */
ret = mi_lttng_writer_write_element_signed_int(writer,
mi_lttng_element_nowrite, field->nowrite);
if (ret) {
goto end;
}
close:
/* Close field element */
ret = mi_lttng_writer_close_element(writer);
end:
return ret;
}
LTTNG_HIDDEN
int mi_lttng_domain(struct mi_writer *writer,
struct lttng_domain *domain, int is_open)
{
int ret = 0;
const char *str_domain;
const char *str_buffer;
assert(domain);
/* Open domain element */
ret = mi_lttng_writer_open_element(writer, config_element_domain);
if (ret) {
goto end;
}
/* Domain Type */
str_domain = mi_lttng_domaintype_string(domain->type);
ret = mi_lttng_writer_write_element_string(writer, config_element_type,
str_domain);
if (ret) {
goto end;
}
/* Buffer Type */
str_buffer= mi_lttng_buffertype_string(domain->buf_type);
ret = mi_lttng_writer_write_element_string(writer,
config_element_buffer_type, str_buffer);
if (ret) {
goto end;
}
/* TODO: union attr
* This union is not currently used and was added for
* future ust domain support.
* Date: 25-06-2014
* */
if (!is_open) {
/* Closing domain element */
ret = mi_lttng_writer_close_element(writer);
}
end:
return ret;
}
LTTNG_HIDDEN
int mi_lttng_context(struct mi_writer *writer,
struct lttng_event_context *context, int is_open)
{
int ret;
const char *type_string;
struct lttng_event_perf_counter_ctx *perf_context;
/* Open context */
ret = mi_lttng_writer_open_element(writer , config_element_context);
if (ret) {
goto end;
}
type_string = mi_lttng_event_contexttype_string(context->ctx);
if (!type_string) {
ret = -LTTNG_ERR_INVALID;
goto end;
}
/* Print context type */
ret = mi_lttng_writer_write_element_string(writer, config_element_type,
type_string);
/* Special case for PERF_*_COUNTER
* print the lttng_event_perf_counter_ctx*/
switch (context->ctx) {
case LTTNG_EVENT_CONTEXT_PERF_COUNTER:
case LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER:
case LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER:
perf_context = &context->u.perf_counter;
ret = mi_lttng_perf_counter_context(writer, perf_context);
if (ret) {
goto end;
}
break;
default:
break;
}
/* Close context */
if (!is_open) {
ret = mi_lttng_writer_close_element(writer);
}
end:
return ret;
}
LTTNG_HIDDEN
int mi_lttng_snapshot_record(struct mi_writer *writer,
const char *current_session_name, const char *url,
const char *cmdline_ctrl_url, const char *cmdline_data_url)
{
int ret;
/* Open element snapshot */
ret = mi_lttng_writer_open_element(writer,
mi_lttng_element_command_snapshot);
if (ret) {
goto end;
}
/*
* If a valid an URL was given, serialize it,
* else take the command line data and ctrl urls*/
if (url) {
/* Destination of the output (ctrl_url)*/
ret = mi_lttng_writer_write_element_string(writer,
mi_lttng_element_snapshot_ctrl_url, url);
if (ret) {
goto end;
}
} else if (cmdline_ctrl_url) {
/* Destination of the output (ctrl_url)*/
ret = mi_lttng_writer_write_element_string(writer,
mi_lttng_element_snapshot_ctrl_url, cmdline_ctrl_url);
if (ret) {
goto end;
}
/* Destination of the output (data_url) */
ret = mi_lttng_writer_write_element_string(writer,
mi_lttng_element_snapshot_data_url, cmdline_data_url);
if (ret) {
goto end;
}
}
/* Close record_snapshot element */
ret = mi_lttng_writer_close_element(writer);
end:
return ret;
}
LTTNG_HIDDEN
int mi_lttng_channel(struct mi_writer *writer,
struct lttng_channel *channel, int is_open)
{
int ret = 0;
assert(channel);
/* Opening channel element */
ret = mi_lttng_writer_open_element(writer, config_element_channel);
if (ret) {
goto end;
}
/* Name */
ret = mi_lttng_writer_write_element_string(writer, config_element_name,
channel->name);
if (ret) {
goto end;
}
/* Enabled ? */
ret = mi_lttng_writer_write_element_bool(writer,
config_element_enabled, channel->enabled);
if (ret) {
goto end;
}
/* Attribute */
ret = mi_lttng_channel_attr(writer, &channel->attr);
if (ret) {
goto end;
}
if (!is_open) {
/* Closing channel element */
ret = mi_lttng_writer_close_element(writer);
if (ret) {
goto end;
}
}
end:
return ret;
}
LTTNG_HIDDEN
int mi_lttng_close_multi_element(struct mi_writer *writer,
unsigned int nb_element)
{
int ret, i;
if (nb_element < 1) {
ret = 0;
goto end;
}
for (i = 0; i < nb_element; i++) {
ret = mi_lttng_writer_close_element(writer);
if (ret) {
goto end;
}
}
end:
return ret;
}
LTTNG_HIDDEN
int mi_lttng_event(struct mi_writer *writer,
struct lttng_event *event, int is_open, enum lttng_domain_type domain)
{
int ret;
ret = mi_lttng_event_common_attributes(writer, event);
if (ret) {
goto end;
}
switch (event->type) {
case LTTNG_EVENT_TRACEPOINT:
{
if (event->loglevel != -1) {
ret = mi_lttng_event_tracepoint_loglevel(writer, event, domain);
} else {
ret = mi_lttng_event_tracepoint_no_loglevel(writer, event);
}
break;
}
case LTTNG_EVENT_FUNCTION:
/* Fallthrough */
case LTTNG_EVENT_PROBE:
ret = mi_lttng_event_function_probe(writer, event);
break;
case LTTNG_EVENT_FUNCTION_ENTRY:
ret = mi_lttng_event_function_entry(writer, event);
break;
case LTTNG_EVENT_ALL:
/* Fallthrough */
default:
break;
}
if (!is_open) {
ret = mi_lttng_writer_close_element(writer);
}
end:
return ret;
}
/* Mi print a partial event.
* enabled is 0 or 1
* success is 0 or 1
*/
static int mi_print_event(char *event_name, int enabled, int success)
{
int ret;
assert(writer);
assert(event_name);
/* Open event element */
ret = mi_lttng_writer_open_element(writer, config_element_event);
if (ret) {
goto end;
}
/* Print the name of event */
ret = mi_lttng_writer_write_element_string(writer,
config_element_name, event_name);
if (ret) {
goto end;
}
/* Print enabled ? */
ret = mi_lttng_writer_write_element_bool(writer,
config_element_enabled, enabled);
if (ret) {
goto end;
}
/* Success ? */
ret = mi_lttng_writer_write_element_bool(writer,
mi_lttng_element_command_success, success);
if (ret) {
goto end;
}
/* Close event element */
ret = mi_lttng_writer_close_element(writer);
end:
return ret;
}
LTTNG_HIDDEN
int mi_lttng_perf_counter_context(struct mi_writer *writer,
struct lttng_event_perf_counter_ctx *perf_context)
{
int ret;
/* Open perf_counter_context */
ret = mi_lttng_writer_open_element(writer,
mi_lttng_element_perf_counter_context);
if (ret) {
goto end;
}
/* Type */
ret = mi_lttng_writer_write_element_unsigned_int(writer,
config_element_type, perf_context->type);
if (ret) {
goto end;
}
/* Config */
ret = mi_lttng_writer_write_element_unsigned_int(writer,
config_element_config, perf_context->config);
if (ret) {
goto end;
}
/* Name of the perf counter */
ret = mi_lttng_writer_write_element_string(writer,
config_element_name, perf_context->name);
if (ret) {
goto end;
}
/* Close perf_counter_context */
ret = mi_lttng_writer_close_element(writer);
end:
return ret;
}
static int mi_partial_session(const char *session_name)
{
int ret;
assert(writer);
assert(session_name);
/* Open session element */
ret = mi_lttng_writer_open_element(writer, config_element_session);
if (ret) {
goto end;
}
ret = mi_lttng_writer_write_element_string(writer, config_element_name,
session_name);
if (ret) {
goto end;
}
/* Closing session element */
ret = mi_lttng_writer_close_element(writer);
end:
return ret;
}
LTTNG_HIDDEN
int mi_lttng_pid_target(struct mi_writer *writer, pid_t pid, int is_open)
{
int ret;
ret = mi_lttng_writer_open_element(writer,
config_element_target_pid);
if (ret) {
goto end;
}
/* Writing pid number
* Special case for element all on track untrack command
* All pid is represented as wildcard *
*/
if ((int) pid == -1) {
ret = mi_lttng_writer_write_element_string(writer,
config_element_pid,
mi_lttng_element_track_untrack_all_wildcard);
} else {
ret = mi_lttng_writer_write_element_signed_int(writer,
config_element_pid, (int) pid);
}
if (ret) {
goto end;
}
if (!is_open) {
ret = mi_lttng_writer_close_element(writer);
if (ret) {
goto end;
}
}
end:
return ret;
}
LTTNG_HIDDEN
int mi_lttng_calibrate(struct mi_writer *writer,
struct lttng_calibrate *calibrate)
{
int ret;
/* Open calibrate element */
ret = mi_lttng_writer_open_element(writer, mi_lttng_element_calibrate);
if (ret) {
goto end;
}
/* Calibration type */
ret = mi_lttng_writer_write_element_string(writer, config_element_type,
mi_lttng_calibratetype_string(calibrate->type));
if (ret) {
goto end;
}
/* Closing calibrate element */
ret = mi_lttng_writer_close_element(writer);
end:
return ret;
}
/*
* Mi print of save command
*/
static int mi_save_print(const char *session_name)
{
int ret;
assert(writer);
if (opt_save_all) {
/* We use a wildcard to represent all sessions */
session_name = "*";
}
/* Print save element */
ret = mi_lttng_writer_open_element(writer, mi_lttng_element_save);
if (ret) {
goto end;
}
/* Print session element */
ret = mi_partial_session(session_name);
if (ret) {
goto end;
}
/* Path element */
if (opt_output_path) {
ret = mi_lttng_writer_write_element_string(writer, config_element_path,
opt_output_path);
if (ret) {
goto end;
}
}
/* Close save element */
ret = mi_lttng_writer_close_element(writer);
end:
return ret;
}
/*
* Machine Interface
* list available domain(s) for a session.
*/
static int mi_list_domains(struct lttng_domain *domains, int count)
{
int i, ret;
/* Open domains element */
ret = mi_lttng_domains_open(writer);
if (ret) {
goto end;
}
for (i = 0; i < count; i++) {
ret = mi_lttng_domain(writer, &domains[i] , 0);
if (ret) {
goto end;
}
}
/* Closing domains element */
ret = mi_lttng_writer_close_element(writer);
if (ret) {
goto end;
}
end:
return ret;
}
/*
* The 'snapshot <cmd> <options>' first level command
*/
int cmd_snapshot(int argc, const char **argv)
{
int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1;
char *session_name = NULL;
static poptContext pc;
pc = poptGetContext(NULL, argc, argv, snapshot_opts, 0);
poptReadDefaultConfig(pc, 0);
/* Mi check */
if (lttng_opt_mi) {
writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
if (!writer) {
ret = -LTTNG_ERR_NOMEM;
goto end;
}
/* Open command element */
ret = mi_lttng_writer_command_open(writer,
mi_lttng_element_command_snapshot);
if (ret) {
ret = CMD_ERROR;
goto end;
}
/* Open output element */
ret = mi_lttng_writer_open_element(writer,
mi_lttng_element_command_output);
if (ret) {
ret = CMD_ERROR;
goto end;
}
}
while ((opt = poptGetNextOpt(pc)) != -1) {
switch (opt) {
case OPT_HELP:
usage(stdout);
goto end;
case OPT_LIST_OPTIONS:
list_cmd_options(stdout, snapshot_opts);
goto end;
case OPT_LIST_COMMANDS:
list_commands(actions, stdout);
goto end;
case OPT_MAX_SIZE:
{
uint64_t val;
const char *opt = poptGetOptArg(pc);
if (utils_parse_size_suffix((char *) opt, &val) < 0) {
ERR("Unable to handle max-size value %s", opt);
ret = CMD_ERROR;
goto end;
}
opt_max_size = val;
break;
}
default:
usage(stderr);
ret = CMD_UNDEFINED;
goto end;
}
}
if (!opt_session_name) {
session_name = get_session_name();
if (session_name == NULL) {
ret = CMD_ERROR;
goto end;
}
current_session_name = session_name;
} else {
current_session_name = opt_session_name;
}
command_ret = handle_command(poptGetArgs(pc));
if (command_ret) {
switch (-command_ret) {
case LTTNG_ERR_EPERM:
ERR("The session needs to be set in no output mode (--no-output)");
break;
case LTTNG_ERR_SNAPSHOT_NODATA:
WARN("%s", lttng_strerror(command_ret));
break;
default:
ERR("%s", lttng_strerror(command_ret));
break;
}
success = 0;
}
if (lttng_opt_mi) {
/* Close output element */
ret = mi_lttng_writer_close_element(writer);
if (ret) {
ret = CMD_ERROR;
goto end;
}
/* Success ? */
ret = mi_lttng_writer_write_element_bool(writer,
mi_lttng_element_command_success, success);
if (ret) {
ret = CMD_ERROR;
goto end;
}
/* Command element close */
ret = mi_lttng_writer_command_close(writer);
if (ret) {
ret = CMD_ERROR;
goto end;
}
}
end:
/* Mi clean-up */
if (writer && mi_lttng_writer_destroy(writer)) {
/* Preserve original error code */
ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL;
}
if (!opt_session_name) {
free(session_name);
}
/* Overwrite ret if an error occured during handle_command */
ret = command_ret ? command_ret : ret;
poptFreeContext(pc);
return ret;
}
/*
* Add channel to trace session
*/
int cmd_enable_channels(int argc, const char **argv)
{
int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1;
static poptContext pc;
char *session_name = NULL;
char *opt_arg = NULL;
init_channel_config();
pc = poptGetContext(NULL, argc, argv, long_options, 0);
poptReadDefaultConfig(pc, 0);
while ((opt = poptGetNextOpt(pc)) != -1) {
switch (opt) {
case OPT_HELP:
usage(stdout);
goto end;
case OPT_DISCARD:
chan.attr.overwrite = 0;
DBG("Channel set to discard");
break;
case OPT_OVERWRITE:
chan.attr.overwrite = 1;
DBG("Channel set to overwrite");
break;
case OPT_SUBBUF_SIZE:
{
uint64_t rounded_size;
int order;
/* Parse the size */
opt_arg = poptGetOptArg(pc);
if (utils_parse_size_suffix(opt_arg, &chan.attr.subbuf_size) < 0 || !chan.attr.subbuf_size) {
ERR("Wrong value in --subbuf-size parameter: %s", opt_arg);
ret = CMD_ERROR;
goto end;
}
order = get_count_order_u64(chan.attr.subbuf_size);
assert(order >= 0);
rounded_size = 1ULL << order;
if (rounded_size < chan.attr.subbuf_size) {
ERR("The subbuf size (%" PRIu64 ") is rounded and overflows!",
chan.attr.subbuf_size);
ret = CMD_ERROR;
goto end;
}
if (rounded_size != chan.attr.subbuf_size) {
WARN("The subbuf size (%" PRIu64 ") is rounded to the next power of 2 (%" PRIu64 ")",
chan.attr.subbuf_size, rounded_size);
chan.attr.subbuf_size = rounded_size;
}
/* Should now be power of 2 */
assert(!((chan.attr.subbuf_size - 1) & chan.attr.subbuf_size));
DBG("Channel subbuf size set to %" PRIu64, chan.attr.subbuf_size);
break;
}
case OPT_NUM_SUBBUF:
{
uint64_t rounded_size;
int order;
errno = 0;
opt_arg = poptGetOptArg(pc);
chan.attr.num_subbuf = strtoull(opt_arg, NULL, 0);
if (errno != 0 || !chan.attr.num_subbuf || !isdigit(opt_arg[0])) {
ERR("Wrong value in --num-subbuf parameter: %s", opt_arg);
ret = CMD_ERROR;
goto end;
}
order = get_count_order_u64(chan.attr.num_subbuf);
assert(order >= 0);
rounded_size = 1ULL << order;
if (rounded_size < chan.attr.num_subbuf) {
ERR("The number of subbuffers (%" PRIu64 ") is rounded and overflows!",
chan.attr.num_subbuf);
ret = CMD_ERROR;
goto end;
}
if (rounded_size != chan.attr.num_subbuf) {
WARN("The number of subbuffers (%" PRIu64 ") is rounded to the next power of 2 (%" PRIu64 ")",
chan.attr.num_subbuf, rounded_size);
chan.attr.num_subbuf = rounded_size;
}
/* Should now be power of 2 */
assert(!((chan.attr.num_subbuf - 1) & chan.attr.num_subbuf));
DBG("Channel subbuf num set to %" PRIu64, chan.attr.num_subbuf);
break;
}
case OPT_SWITCH_TIMER:
{
unsigned long v;
errno = 0;
opt_arg = poptGetOptArg(pc);
v = strtoul(opt_arg, NULL, 0);
if (errno != 0 || !isdigit(opt_arg[0])) {
ERR("Wrong value in --switch-timer parameter: %s", opt_arg);
ret = CMD_ERROR;
goto end;
}
if (v != (uint32_t) v) {
ERR("32-bit overflow in --switch-timer parameter: %s", opt_arg);
ret = CMD_ERROR;
goto end;
}
chan.attr.switch_timer_interval = (uint32_t) v;
DBG("Channel switch timer interval set to %d", chan.attr.switch_timer_interval);
break;
}
case OPT_READ_TIMER:
{
unsigned long v;
errno = 0;
opt_arg = poptGetOptArg(pc);
v = strtoul(opt_arg, NULL, 0);
if (errno != 0 || !isdigit(opt_arg[0])) {
ERR("Wrong value in --read-timer parameter: %s", opt_arg);
ret = CMD_ERROR;
goto end;
}
if (v != (uint32_t) v) {
ERR("32-bit overflow in --read-timer parameter: %s", opt_arg);
ret = CMD_ERROR;
goto end;
}
chan.attr.read_timer_interval = (uint32_t) v;
DBG("Channel read timer interval set to %d", chan.attr.read_timer_interval);
break;
}
case OPT_USERSPACE:
opt_userspace = 1;
break;
case OPT_TRACEFILE_SIZE:
opt_arg = poptGetOptArg(pc);
if (utils_parse_size_suffix(opt_arg, &chan.attr.tracefile_size) < 0) {
ERR("Wrong value in --tracefile-size parameter: %s", opt_arg);
ret = CMD_ERROR;
goto end;
}
DBG("Maximum tracefile size set to %" PRIu64,
chan.attr.tracefile_size);
break;
case OPT_TRACEFILE_COUNT:
{
unsigned long v;
errno = 0;
opt_arg = poptGetOptArg(pc);
v = strtoul(opt_arg, NULL, 0);
if (errno != 0 || !isdigit(opt_arg[0])) {
ERR("Wrong value in --tracefile-count parameter: %s", opt_arg);
ret = CMD_ERROR;
goto end;
}
if (v != (uint32_t) v) {
ERR("32-bit overflow in --tracefile-count parameter: %s", opt_arg);
ret = CMD_ERROR;
goto end;
}
chan.attr.tracefile_count = (uint32_t) v;
DBG("Maximum tracefile count set to %" PRIu64,
chan.attr.tracefile_count);
break;
}
case OPT_LIST_OPTIONS:
list_cmd_options(stdout, long_options);
goto end;
default:
usage(stderr);
ret = CMD_UNDEFINED;
goto end;
}
}
/* Mi check */
if (lttng_opt_mi) {
writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
if (!writer) {
ret = -LTTNG_ERR_NOMEM;
goto end;
}
/* Open command element */
ret = mi_lttng_writer_command_open(writer,
mi_lttng_element_command_enable_channels);
if (ret) {
ret = CMD_ERROR;
goto end;
}
/* Open output element */
ret = mi_lttng_writer_open_element(writer,
mi_lttng_element_command_output);
if (ret) {
ret = CMD_ERROR;
goto end;
}
}
opt_channels = (char*) poptGetArg(pc);
if (opt_channels == NULL) {
ERR("Missing channel name.\n");
usage(stderr);
ret = CMD_ERROR;
success = 0;
goto mi_closing;
}
if (!opt_session_name) {
session_name = get_session_name();
if (session_name == NULL) {
command_ret = CMD_ERROR;
success = 0;
goto mi_closing;
}
} else {
session_name = opt_session_name;
}
command_ret = enable_channel(session_name);
if (command_ret) {
success = 0;
}
mi_closing:
/* Mi closing */
if (lttng_opt_mi) {
/* Close output element */
ret = mi_lttng_writer_close_element(writer);
if (ret) {
goto end;
}
/* Success ? */
ret = mi_lttng_writer_write_element_bool(writer,
mi_lttng_element_command_success, success);
if (ret) {
goto end;
}
/* Command element close */
ret = mi_lttng_writer_command_close(writer);
if (ret) {
goto end;
}
}
end:
/* Mi clean-up */
if (writer && mi_lttng_writer_destroy(writer)) {
/* Preserve original error code */
ret = ret ? ret : LTTNG_ERR_MI_IO_FAIL;
}
if (!opt_session_name && session_name) {
free(session_name);
}
/* Overwrite ret if an error occurred when enable_channel */
ret = command_ret ? command_ret : ret;
poptFreeContext(pc);
return ret;
}
