/*
* Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
*
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; only version 2
- * of the License.
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2 only,
+ * as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#define _GNU_SOURCE
#include "../command.h"
+#include <src/common/sessiond-comm/sessiond-comm.h>
+
static char *opt_channels;
static int opt_kernel;
static char *opt_session_name;
static int opt_userspace;
static struct lttng_channel chan;
+static char *opt_output;
#if 0
/* Not implemented yet */
static char *opt_cmd_name;
static struct lttng_handle *handle;
+const char *output_mmap = "mmap";
+const char *output_splice = "splice";
+
static struct poptOption long_options[] = {
/* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
{"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
{"switch-timer", 0, POPT_ARG_INT, 0, OPT_SWITCH_TIMER, 0, 0},
{"read-timer", 0, POPT_ARG_INT, 0, OPT_READ_TIMER, 0, 0},
{"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
+ {"output", 0, POPT_ARG_STRING, &opt_output, 0, 0, 0},
{0, 0, 0, 0, 0, 0, 0}
};
*/
static void usage(FILE *ofp)
{
- fprintf(ofp, "usage: lttng enable-channel NAME[,NAME2,...] [options] [channel_options]\n");
+ 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 Apply to session name\n");
+ fprintf(ofp, " -s, --session NAME Apply to session name\n");
fprintf(ofp, " -k, --kernel Apply to the kernel tracer\n");
-#if 0
- fprintf(ofp, " -u, --userspace [CMD] Apply to the user-space tracer\n");
- fprintf(ofp, " If no CMD, the domain used is UST global\n");
- fprintf(ofp, " or else the domain is UST EXEC_NAME\n");
- fprintf(ofp, " -p, --pid PID If -u, apply to specific PID (domain: UST PID)\n");
-#else
fprintf(ofp, " -u, --userspace Apply to the user-space tracer\n");
-#endif
fprintf(ofp, "\n");
fprintf(ofp, "Channel options:\n");
fprintf(ofp, " --discard Discard event when buffers are full%s\n",
fprintf(ofp, " (default: %u, kernel default: %u)\n",
DEFAULT_CHANNEL_SUBBUF_SIZE,
DEFAULT_KERNEL_CHANNEL_SUBBUF_SIZE);
+ fprintf(ofp, " Needs to be a power of 2 for\n");
+ fprintf(ofp, " kernel and ust tracers\n");
fprintf(ofp, " --num-subbuf NUM Number of subbufers\n");
- fprintf(ofp, " (default: %u, kernel default: %u)\n",
- DEFAULT_CHANNEL_SUBBUF_NUM,
- DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM);
+ fprintf(ofp, " (default: %u)\n",
+ DEFAULT_CHANNEL_SUBBUF_NUM);
+ fprintf(ofp, " Needs to be a power of 2 for\n");
+ fprintf(ofp, " kernel and ust tracers\n");
fprintf(ofp, " --switch-timer USEC Switch timer interval in usec (default: %u)\n",
DEFAULT_CHANNEL_SWITCH_TIMER);
fprintf(ofp, " --read-timer USEC Read timer interval in usec (default: %u)\n",
DEFAULT_CHANNEL_READ_TIMER);
+ fprintf(ofp, " --output TYPE Channel output type (Values: %s, %s)\n",
+ output_mmap, output_splice);
fprintf(ofp, "\n");
}
char *channel_name;
struct lttng_domain dom;
+ memset(&dom, 0, sizeof(dom));
+
/* Create lttng domain */
if (opt_kernel) {
dom.type = LTTNG_DOMAIN_KERNEL;
set_default_attr(&dom);
+ /* 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;
ret = lttng_enable_channel(handle, &chan);
if (ret < 0) {
- ERR("Channel %s: %s (session %s)", channel_name,
- lttng_strerror(ret), session_name);
+ switch (-ret) {
+ case LTTNG_ERR_KERN_CHAN_EXIST:
+ case LTTNG_ERR_UST_CHAN_EXIST:
+ WARN("Channel %s: %s (session %s", channel_name,
+ lttng_strerror(ret), session_name);
+ goto error;
+ default:
+ ERR("Channel %s: %s (session %s)", channel_name,
+ lttng_strerror(ret), session_name);
+ break;
+ }
warn = 1;
} else {
MSG("%s channel %s enabled for session %s",