/*
* 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;
}
/*
* Add channel to trace session
*/
int cmd_enable_channels(int argc, const char **argv)
{
int opt, ret = CMD_SUCCESS;
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) {
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) {
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;
}
}
opt_channels = (char*) poptGetArg(pc);
if (opt_channels == NULL) {
ERR("Missing channel name.\n");
usage(stderr);
ret = CMD_ERROR;
goto end;
}
if (!opt_session_name) {
session_name = get_session_name();
if (session_name == NULL) {
ret = CMD_ERROR;
goto end;
}
} else {
session_name = opt_session_name;
}
ret = enable_channel(session_name);
end:
if (!opt_session_name && session_name) {
free(session_name);
}
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;
const char *leftover = 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:
SHOW_HELP();
goto end;
case OPT_DISCARD:
chan_opts.attr.overwrite = 0;
DBG("Channel set to discard");
break;
case OPT_OVERWRITE:
chan_opts.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_opts.attr.subbuf_size) < 0 || !chan_opts.attr.subbuf_size) {
ERR("Wrong value in --subbuf-size parameter: %s", opt_arg);
ret = CMD_ERROR;
goto end;
}
order = get_count_order_u64(chan_opts.attr.subbuf_size);
assert(order >= 0);
rounded_size = 1ULL << order;
if (rounded_size < chan_opts.attr.subbuf_size) {
ERR("The subbuf size (%" PRIu64 ") is rounded and overflows!",
chan_opts.attr.subbuf_size);
ret = CMD_ERROR;
goto end;
}
if (rounded_size != chan_opts.attr.subbuf_size) {
WARN("The subbuf size (%" PRIu64 ") is rounded to the next power of 2 (%" PRIu64 ")",
chan_opts.attr.subbuf_size, rounded_size);
chan_opts.attr.subbuf_size = rounded_size;
}
/* Should now be power of 2 */
assert(!((chan_opts.attr.subbuf_size - 1) & chan_opts.attr.subbuf_size));
DBG("Channel subbuf size set to %" PRIu64, chan_opts.attr.subbuf_size);
break;
}
case OPT_NUM_SUBBUF:
{
uint64_t rounded_size;
int order;
errno = 0;
opt_arg = poptGetOptArg(pc);
chan_opts.attr.num_subbuf = strtoull(opt_arg, NULL, 0);
if (errno != 0 || !chan_opts.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_opts.attr.num_subbuf);
assert(order >= 0);
rounded_size = 1ULL << order;
if (rounded_size < chan_opts.attr.num_subbuf) {
ERR("The number of subbuffers (%" PRIu64 ") is rounded and overflows!",
chan_opts.attr.num_subbuf);
ret = CMD_ERROR;
goto end;
}
if (rounded_size != chan_opts.attr.num_subbuf) {
WARN("The number of subbuffers (%" PRIu64 ") is rounded to the next power of 2 (%" PRIu64 ")",
chan_opts.attr.num_subbuf, rounded_size);
chan_opts.attr.num_subbuf = rounded_size;
}
/* Should now be power of 2 */
assert(!((chan_opts.attr.num_subbuf - 1) & chan_opts.attr.num_subbuf));
DBG("Channel subbuf num set to %" PRIu64, chan_opts.attr.num_subbuf);
break;
}
case OPT_SWITCH_TIMER:
{
uint64_t v;
errno = 0;
opt_arg = poptGetOptArg(pc);
if (utils_parse_time_suffix(opt_arg, &v) < 0) {
ERR("Wrong value for --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_opts.attr.switch_timer_interval = (uint32_t) v;
DBG("Channel switch timer interval set to %d %s",
chan_opts.attr.switch_timer_interval,
USEC_UNIT);
break;
}
case OPT_READ_TIMER:
{
uint64_t v;
errno = 0;
opt_arg = poptGetOptArg(pc);
if (utils_parse_time_suffix(opt_arg, &v) < 0) {
ERR("Wrong value for --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_opts.attr.read_timer_interval = (uint32_t) v;
DBG("Channel read timer interval set to %d %s",
chan_opts.attr.read_timer_interval,
USEC_UNIT);
break;
}
case OPT_MONITOR_TIMER:
{
uint64_t v;
errno = 0;
opt_arg = poptGetOptArg(pc);
if (utils_parse_time_suffix(opt_arg, &v) < 0) {
ERR("Wrong value for --monitor-timer parameter: %s", opt_arg);
ret = CMD_ERROR;
goto end;
}
opt_monitor_timer.interval = (uint64_t) v;
opt_monitor_timer.set = true;
DBG("Channel monitor timer interval set to %" PRIu64 " %s",
opt_monitor_timer.interval,
USEC_UNIT);
break;
}
case OPT_BLOCKING_TIMEOUT:
{
uint64_t v;
long long v_msec;
errno = 0;
opt_arg = poptGetOptArg(pc);
if (strcmp(opt_arg, "inf") == 0) {
opt_blocking_timeout.value = (int64_t) -1;
opt_blocking_timeout.set = true;
DBG("Channel blocking timeout set to infinity");
break;
}
if (utils_parse_time_suffix(opt_arg, &v) < 0) {
ERR("Wrong value for --blocking-timeout parameter: %s", opt_arg);
ret = CMD_ERROR;
goto end;
}
/*
* While LTTng-UST and LTTng-tools will accept a
* blocking timeout expressed in µs, the current
* tracer implementation relies on poll() which
* takes an "int timeout" parameter expressed in
* msec.
*
* Since the error reporting from the tracer is
* not precise, we perform this check here to
* provide a helpful error message in case of
* overflow.
*
* The setter (liblttng-ctl) also performs an
* equivalent check.
*/
v_msec = v / 1000;
if (v_msec != (int32_t) v_msec) {
ERR("32-bit milliseconds overflow in --blocking-timeout parameter: %s", opt_arg);
ret = CMD_ERROR;
goto end;
}
opt_blocking_timeout.value = (int64_t) v;
opt_blocking_timeout.set = true;
DBG("Channel blocking timeout set to %" PRId64 " %s%s",
opt_blocking_timeout.value,
USEC_UNIT,
opt_blocking_timeout.value == 0 ?
" (non-blocking)" : "");
break;
}
case OPT_USERSPACE:
opt_userspace = 1;
break;
case OPT_TRACEFILE_SIZE:
opt_arg = poptGetOptArg(pc);
if (utils_parse_size_suffix(opt_arg, &chan_opts.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_opts.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_opts.attr.tracefile_count = (uint32_t) v;
DBG("Maximum tracefile count set to %" PRIu64,
chan_opts.attr.tracefile_count);
break;
}
case OPT_LIST_OPTIONS:
list_cmd_options(stdout, long_options);
goto end;
default:
ret = CMD_UNDEFINED;
goto end;
}
}
ret = print_missing_or_multiple_domains(opt_kernel + opt_userspace);
if (ret) {
ret = CMD_ERROR;
goto end;
}
if (chan_opts.attr.overwrite == 1 && opt_blocking_timeout.set &&
opt_blocking_timeout.value != 0) {
ERR("You cannot specify --overwrite and --blocking-timeout=N, "
"where N is different than 0");
ret = CMD_ERROR;
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");
ret = CMD_ERROR;
success = 0;
goto mi_closing;
}
leftover = poptGetArg(pc);
if (leftover) {
ERR("Unknown argument: %s", leftover);
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;
}