-/*
- * 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 "conf.h"
-#include "utils.h"
-
-static char *opt_channel_name;
-static char *opt_kernel;
-static char *opt_cmd_name;
-static char *opt_session_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},
- {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 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, " -s, --session Apply on session name\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(opt_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;
- chan.attr.output = DEFAULT_KERNEL_CHANNEL_OUTPUT;
-}
-
-/*
- * 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;
-}