* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
-#define _GNU_SOURCE
+#define _LGPL_SOURCE
#include <popt.h>
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <ctype.h>
+#include <common/sessiond-comm/sessiond-comm.h>
+#include <common/utils.h>
+#include <common/mi-lttng.h>
+
#include "../command.h"
#include "../utils.h"
-#include <src/common/sessiond-comm/sessiond-comm.h>
-#include <src/common/utils.h>
static char *opt_channels;
static int opt_kernel;
static int opt_buffer_pid;
static int opt_buffer_global;
+static struct mi_writer *writer;
+
enum {
OPT_HELP = 1,
OPT_DISCARD,
{0, 0, 0, 0, 0, 0, 0}
};
-/*
- * usage
- */
-static void usage(FILE *ofp)
-{
- fprintf(ofp, "usage: lttng enable-channel NAME[,NAME2,...] [-u|-k] [OPTIONS]\n");
- fprintf(ofp, "\n");
- fprintf(ofp, "Options:\n");
- fprintf(ofp, " -h, --help Show this help\n");
- fprintf(ofp, " --list-options Simple listing of options\n");
- fprintf(ofp, " -s, --session NAME Apply to session name\n");
- fprintf(ofp, " -k, --kernel Apply to the kernel tracer\n");
- fprintf(ofp, " -u, --userspace Apply to the user-space tracer\n");
- fprintf(ofp, "\n");
- fprintf(ofp, "Channel options:\n");
- fprintf(ofp, " --discard Discard event when buffers are full%s\n",
- DEFAULT_CHANNEL_OVERWRITE ? "" : " (default)");
- fprintf(ofp, " --overwrite Flight recorder mode%s\n",
- DEFAULT_CHANNEL_OVERWRITE ? " (default)" : "");
- fprintf(ofp, " --subbuf-size SIZE Subbuffer size in bytes {+k,+M,+G}\n");
- fprintf(ofp, " (default UST uid: %zu, UST pid: %zu, kernel: %zu, metadata: %zu)\n",
- default_get_ust_uid_channel_subbuf_size(),
- default_get_ust_pid_channel_subbuf_size(),
- default_get_kernel_channel_subbuf_size(),
- default_get_metadata_subbuf_size());
- fprintf(ofp, " Rounded up to the next power of 2.\n");
- fprintf(ofp, " --num-subbuf NUM Number of subbufers\n");
- fprintf(ofp, " (default UST uid: %u, UST pid: %u, kernel: %u, metadata: %u)\n",
- DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM, DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM,
- DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM, DEFAULT_METADATA_SUBBUF_NUM);
- fprintf(ofp, " Rounded up to the next power of 2.\n");
- fprintf(ofp, " --switch-timer USEC Switch timer interval in usec\n");
- fprintf(ofp, " (default UST uid: %u, UST pid: %u, kernel: %u, metadata: %u)\n",
- DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER, DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER,
- DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER, DEFAULT_METADATA_SWITCH_TIMER);
- fprintf(ofp, " --read-timer USEC Read timer interval in usec.\n");
- fprintf(ofp, " (default UST uid: %u, UST pid: %u, kernel: %u, metadata: %u)\n",
- DEFAULT_UST_UID_CHANNEL_READ_TIMER, DEFAULT_UST_UID_CHANNEL_READ_TIMER,
- DEFAULT_KERNEL_CHANNEL_READ_TIMER, DEFAULT_METADATA_READ_TIMER);
- fprintf(ofp, " --output TYPE Channel output type (Values: %s, %s)\n",
- output_mmap, output_splice);
- fprintf(ofp, " (default UST uid: %s, UST pid: %s, kernel: %s, metadata: %s)\n",
- DEFAULT_UST_UID_CHANNEL_OUTPUT == LTTNG_EVENT_MMAP ? output_mmap : output_splice,
- DEFAULT_UST_PID_CHANNEL_OUTPUT == LTTNG_EVENT_MMAP ? output_mmap : output_splice,
- DEFAULT_KERNEL_CHANNEL_OUTPUT == LTTNG_EVENT_MMAP ? output_mmap : output_splice,
- DEFAULT_METADATA_OUTPUT == LTTNG_EVENT_MMAP ? output_mmap : output_splice);
- fprintf(ofp, " --buffers-uid Use per UID buffer (-u only)\n");
- fprintf(ofp, " --buffers-pid Use per PID buffer (-u only)\n");
- fprintf(ofp, " --buffers-global Use shared buffer for the whole system (-k only)\n");
- fprintf(ofp, " -C, --tracefile-size SIZE\n");
- fprintf(ofp, " Maximum size of each tracefile within a stream (in bytes). 0 means unlimited.\n");
- fprintf(ofp, " (default: %u)\n", DEFAULT_CHANNEL_TRACEFILE_SIZE);
- fprintf(ofp, " -W, --tracefile-count COUNT\n");
- fprintf(ofp, " Used in conjunction with -C option, this will limit the number\n");
- fprintf(ofp, " of files created to the specified count. 0 means unlimited.\n");
- fprintf(ofp, " (default: %u)\n", DEFAULT_CHANNEL_TRACEFILE_COUNT);
- fprintf(ofp, "\n");
-}
-
/*
* Set default attributes depending on those already defined from the command
* line.
if (chan.attr.read_timer_interval == -1) {
chan.attr.read_timer_interval = default_attr.read_timer_interval;
}
- if (chan.attr.output == -1) {
+ if ((int) chan.attr.output == -1) {
chan.attr.output = default_attr.output;
}
if (chan.attr.tracefile_count == -1) {
*/
static int enable_channel(char *session_name)
{
- int ret = CMD_SUCCESS, warn = 0;
+ int ret = CMD_SUCCESS, warn = 0, error = 0, success = 0;
char *channel_name;
struct lttng_domain dom;
dom.buf_type = LTTNG_BUFFER_PER_UID;
}
} else {
- ERR("Please specify a tracer (-k/--kernel or -u/--userspace)");
- ret = CMD_ERROR;
- goto error;
+ /* Checked by the caller. */
+ assert(0);
}
set_default_attr(&dom);
} 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;
}
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';
+ /* Validate channel name's length */
+ if (strlen(channel_name) >= NAME_MAX) {
+ ERR("Channel name is too long (max. %zu characters)",
+ sizeof(chan.name) - 1);
+ error = 1;
+ goto skip_enable;
+ }
+
+ /* Copy channel name */
+ strcpy(chan.name, channel_name);
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);
- goto error;
+ warn = 1;
+ break;
+ case LTTNG_ERR_INVALID_CHANNEL_NAME:
+ ERR("Invalid channel name: \"%s\". "
+ "Channel names may not start with '.', and "
+ "may not contain '/'.", channel_name);
+ error = 1;
+ break;
default:
ERR("Channel %s: %s (session %s)", channel_name,
lttng_strerror(ret), session_name);
+ error = 1;
break;
}
- warn = 1;
} else {
MSG("%s channel %s enabled for session %s",
- opt_kernel ? "Kernel" : "UST", channel_name,
- session_name);
+ get_domain_str(dom.type), channel_name, session_name);
+ success = 1;
+ }
+
+skip_enable:
+ 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 event */
+ /* 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 (warn) {
+ /* 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);
* those needed to be set by the default values.
*/
memset(&chan.attr, -1, sizeof(chan.attr));
+ chan.attr.extended.ptr = NULL;
}
/*
*/
int cmd_enable_channels(int argc, const char **argv)
{
- int opt, ret = CMD_SUCCESS;
+ int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1;
static poptContext pc;
char *session_name = NULL;
char *opt_arg = NULL;
while ((opt = poptGetNextOpt(pc)) != -1) {
switch (opt) {
case OPT_HELP:
- usage(stdout);
+ SHOW_HELP();
goto end;
case OPT_DISCARD:
chan.attr.overwrite = 0;
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);
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);
list_cmd_options(stdout, long_options);
goto end;
default:
- usage(stderr);
ret = CMD_UNDEFINED;
goto end;
}
}
+ ret = print_missing_or_multiple_domains(opt_kernel + opt_userspace);
+ if (ret) {
+ 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");
- usage(stderr);
ret = CMD_ERROR;
- goto end;
+ success = 0;
+ goto mi_closing;
}
if (!opt_session_name) {
session_name = get_session_name();
if (session_name == NULL) {
- ret = CMD_ERROR;
- goto end;
+ command_ret = CMD_ERROR;
+ success = 0;
+ goto mi_closing;
}
} else {
session_name = opt_session_name;
}
- ret = enable_channel(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;
}
projects / lttng-tools.git / blobdiff