--- /dev/null
+/*
+ * 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; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * 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.
+ */
+
+#define _GNU_SOURCE
+#include <popt.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "cmd.h"
+#include "config.h"
+#include "utils.h"
+
+static char *opt_channel_name;
+static char *opt_kernel;
+static char *opt_cmd_name;
+static int opt_pid_all;
+static int opt_userspace;
+static pid_t opt_pid;
+static struct lttng_channel chan;
+
+enum {
+ OPT_HELP = 1,
+ OPT_DISCARD,
+ OPT_OVERWRITE,
+ OPT_SUBBUF_SIZE,
+ OPT_NUM_SUBBUF,
+ OPT_SWITCH_TIMER,
+ OPT_READ_TIMER,
+ OPT_USERSPACE,
+};
+
+static struct poptOption long_options[] = {
+ /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
+ {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
+ {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
+ {"userspace", 'u', POPT_ARG_STRING | POPT_ARGFLAG_OPTIONAL, 0, OPT_USERSPACE, 0, 0},
+ {"all", 0, POPT_ARG_VAL, &opt_pid_all, 1, 0, 0},
+ {"pid", 'p', POPT_ARG_INT, &opt_pid, 0, 0, 0},
+ {"discard", 0, POPT_ARG_NONE, 0, OPT_DISCARD, 0, 0},
+ {"overwrite", 0, POPT_ARG_NONE, 0, OPT_OVERWRITE, 0, 0},
+ {"subbuf_size", 0, POPT_ARG_DOUBLE, 0, OPT_SUBBUF_SIZE, 0, 0},
+ {"num_subbuf", 0, POPT_ARG_INT, 0, OPT_NUM_SUBBUF, 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},
+ {0, 0, 0, 0, 0, 0, 0}
+};
+
+/*
+ * usage
+ */
+static void usage(FILE *ofp)
+{
+ fprintf(ofp, "usage: lttng add-channel NAME [options] [channel_options]\n");
+ fprintf(ofp, "\n");
+ fprintf(ofp, " -h, --help Show this help\n");
+ fprintf(ofp, " -k, --kernel Apply on the kernel tracer\n");
+ fprintf(ofp, " -u, --userspace [CMD] Apply on the user-space tracer\n");
+ fprintf(ofp, " --all If -u, apply on all traceable apps\n");
+ fprintf(ofp, " -p, --pid PID If -u, apply on a specific PID\n");
+ fprintf(ofp, "\n");
+ fprintf(ofp, "Channel options:\n");
+ fprintf(ofp, " --discard Discard event when buffers are full (default)\n");
+ fprintf(ofp, " --overwrite Flight recorder mode\n");
+ fprintf(ofp, " --subbuf_size Subbuffer size in bytes (default: 4096)\n");
+ fprintf(ofp, " --num_subbuf Number of subbufers (default: 2)\n");
+ fprintf(ofp, " --switch_timer Switch timer interval in usec (default: 0)\n");
+ fprintf(ofp, " --read_timer Read timer interval in usec (default: 200)\n");
+ fprintf(ofp, "\n");
+}
+
+/*
+ * add_channel
+ *
+ * Adding channel using the lttng API.
+ */
+static int add_channel(void)
+{
+ int ret = CMD_SUCCESS;
+
+ if (set_session_name() < 0) {
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ /* Copy channel name and normalize it */
+ strncpy(chan.name, opt_channel_name, NAME_MAX);
+ chan.name[NAME_MAX - 1] = '\0';
+
+ /* Kernel tracer action */
+ if (opt_kernel) {
+ /* Create kernel channel */
+ ret = lttng_kernel_create_channel(&chan);
+ if (ret < 0) {
+ goto error;
+ }
+ } else if (opt_userspace) { /* User-space tracer action */
+ /*
+ * TODO: Waiting on lttng UST 2.0
+ */
+ if (opt_pid_all) {
+ } else if (opt_pid != 0) {
+ }
+ ret = CMD_NOT_IMPLEMENTED;
+ goto error;
+ } else {
+ ERR("Please specify a tracer (kernel or user-space)");
+ goto error;
+ }
+
+ MSG("Channel %s created", opt_channel_name);
+
+error:
+ return ret;
+}
+
+/*
+ * init_channel_config
+ *
+ * Default value for channel configuration.
+ */
+static void init_channel_config(void)
+{
+ chan.attr.overwrite = DEFAULT_CHANNEL_OVERWRITE;
+ chan.attr.subbuf_size = DEFAULT_CHANNEL_SUBBUF_SIZE;
+ chan.attr.num_subbuf = DEFAULT_CHANNEL_SUBBUF_NUM;
+ chan.attr.switch_timer_interval = DEFAULT_CHANNEL_SWITCH_TIMER;
+ chan.attr.read_timer_interval = DEFAULT_CHANNEL_READ_TIMER;
+}
+
+/*
+ * cmd_add_channel
+ *
+ * Add channel to trace session
+ */
+int cmd_add_channel(int argc, const char **argv)
+{
+ int opt, ret;
+ static poptContext pc;
+
+ 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(stderr);
+ ret = CMD_SUCCESS;
+ goto end;
+ case OPT_USERSPACE:
+ opt_userspace = 1;
+ opt_cmd_name = poptGetOptArg(pc);
+ break;
+ 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:
+ chan.attr.subbuf_size = atol(poptGetOptArg(pc));
+ DBG("Channel subbuf size set to %lu", chan.attr.subbuf_size);
+ break;
+ case OPT_NUM_SUBBUF:
+ chan.attr.num_subbuf = atoi(poptGetOptArg(pc));
+ DBG("Channel subbuf num set to %lu", chan.attr.num_subbuf);
+ break;
+ case OPT_SWITCH_TIMER:
+ chan.attr.switch_timer_interval = atoi(poptGetOptArg(pc));
+ DBG("Channel switch timer interval set to %d", chan.attr.switch_timer_interval);
+ break;
+ case OPT_READ_TIMER:
+ chan.attr.read_timer_interval = atoi(poptGetOptArg(pc));
+ DBG("Channel read timer interval set to %d", chan.attr.read_timer_interval);
+ break;
+ default:
+ usage(stderr);
+ ret = CMD_UNDEFINED;
+ goto end;
+ }
+ }
+
+ opt_channel_name = (char*) poptGetArg(pc);
+ if (opt_channel_name == NULL) {
+ ERR("Missing channel name.\n");
+ usage(stderr);
+ ret = CMD_SUCCESS;
+ goto end;
+ }
+
+ ret = add_channel();
+
+end:
+ return ret;
+}
projects / lttng-tools.git / blobdiff