X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=lttng%2Fcommands%2Fenable_channels.c;fp=lttng%2Fcommands%2Fenable_channels.c;h=0000000000000000000000000000000000000000;hp=52745f69a651d61ec91f18ca1b8cff81bf0c9d6a;hb=10a8a2237343699e3923d87e24dbf2d7fe225377;hpb=734f79bf717d87817623d382c59086dc9e8ef610 diff --git a/lttng/commands/enable_channels.c b/lttng/commands/enable_channels.c deleted file mode 100644 index 52745f69a..000000000 --- a/lttng/commands/enable_channels.c +++ /dev/null @@ -1,287 +0,0 @@ -/* - * Copyright (C) 2011 - David Goulet - * - * 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 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 -#include -#include -#include -#include -#include -#include -#include - -#include "../cmd.h" -#include "../conf.h" -#include "../utils.h" - -static char *opt_channels; -static int opt_kernel; -static char *opt_cmd_name; -static char *opt_session_name; -static int opt_userspace; -static char *opt_cmd_name; -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 lttng_handle *handle; - -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, &opt_cmd_name, OPT_USERSPACE, 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 enable-channel NAME[,NAME2,...] [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 for 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"); - 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 Subbuffer size in bytes\n"); - fprintf(ofp, " (default: %u, kernel default: %u)\n", - DEFAULT_CHANNEL_SUBBUF_SIZE, - DEFAULT_KERNEL_CHANNEL_SUBBUF_SIZE); - fprintf(ofp, " --num-subbuf Number of subbufers\n"); - fprintf(ofp, " (default: %u, kernel default: %u)\n", - DEFAULT_CHANNEL_SUBBUF_NUM, - DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM); - fprintf(ofp, " --switch-timer Switch timer interval in usec (default: %u)\n", - DEFAULT_CHANNEL_SWITCH_TIMER); - fprintf(ofp, " --read-timer Read timer interval in usec (default: %u)\n", - DEFAULT_CHANNEL_READ_TIMER); - fprintf(ofp, "\n"); -} - -/* - * Set default attributes depending on those already defined from the command - * line. - */ -static void set_default_attr(struct lttng_domain *dom) -{ - struct lttng_channel_attr default_attr; - - /* Set attributes */ - lttng_channel_set_default_attr(dom, &default_attr); - - if (chan.attr.overwrite == -1) { - chan.attr.overwrite = default_attr.overwrite; - } - if (chan.attr.subbuf_size == -1) { - chan.attr.subbuf_size = default_attr.subbuf_size; - } - if (chan.attr.num_subbuf == -1) { - chan.attr.num_subbuf = default_attr.num_subbuf; - } - if (chan.attr.switch_timer_interval == -1) { - chan.attr.switch_timer_interval = default_attr.switch_timer_interval; - } - if (chan.attr.read_timer_interval == -1) { - chan.attr.read_timer_interval = default_attr.read_timer_interval; - } - if (chan.attr.output == -1) { - chan.attr.output = default_attr.output; - } -} - -/* - * Adding channel using the lttng API. - */ -static int enable_channel(char *session_name) -{ - int ret = CMD_SUCCESS; - char *channel_name; - struct lttng_domain dom; - - if (opt_kernel) { - dom.type = LTTNG_DOMAIN_KERNEL; - } else if (opt_pid != 0) { - dom.type = LTTNG_DOMAIN_UST_PID; - dom.attr.pid = opt_pid; - DBG("PID %d set to lttng handle", opt_pid); - } else if (opt_userspace && opt_cmd_name == NULL) { - dom.type = LTTNG_DOMAIN_UST; - } else if (opt_userspace && opt_cmd_name != NULL) { - dom.type = LTTNG_DOMAIN_UST_EXEC_NAME; - strncpy(dom.attr.exec_name, opt_cmd_name, NAME_MAX); - } else { - ERR("Please specify a tracer (-k/--kernel or -u/--userspace)"); - ret = CMD_NOT_IMPLEMENTED; - goto error; - } - - set_default_attr(&dom); - - handle = lttng_create_handle(session_name, &dom); - if (handle == NULL) { - ret = -1; - 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'; - - DBG("Enabling channel %s", channel_name); - - ret = lttng_enable_channel(handle, &chan); - if (ret < 0) { - goto error; - } else { - MSG("%s channel %s enabled for session %s", - opt_kernel ? "Kernel" : "UST", channel_name, - session_name); - } - - /* Next event */ - channel_name = strtok(NULL, ","); - } - -error: - lttng_destroy_handle(handle); - - return ret; -} - -/* - * Default value for channel configuration. - */ -static void init_channel_config(void) -{ - /* - * Put -1 everywhere so we can identify those set by the command line and - * those needed to be set by the default values. - */ - memset(&chan.attr, -1, sizeof(chan.attr)); -} - -/* - * Add channel to trace session - */ -int cmd_enable_channels(int argc, const char **argv) -{ - int opt, ret; - static poptContext pc; - char *session_name = 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(stderr); - ret = CMD_SUCCESS; - 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: - chan.attr.subbuf_size = atol(poptGetOptArg(pc)); - DBG("Channel subbuf size set to %" PRIu64, chan.attr.subbuf_size); - break; - case OPT_NUM_SUBBUF: - chan.attr.num_subbuf = atoi(poptGetOptArg(pc)); - DBG("Channel subbuf num set to %" PRIu64, 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; - case OPT_USERSPACE: - opt_userspace = 1; - break; - 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_SUCCESS; - goto end; - } - - if (!opt_session_name) { - session_name = get_session_name(); - if (session_name == NULL) { - ret = -1; - goto end; - } - } else { - session_name = opt_session_name; - } - - ret = enable_channel(session_name); - -end: - return ret; -}