+/*
+ * Copyright (C) 2017 - Julien Desfossez <jdesfossez@efficios.com>
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#define _LGPL_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 <inttypes.h>
+#include <ctype.h>
+
+#include <common/sessiond-comm/sessiond-comm.h>
+#include <common/mi-lttng.h>
+#include <common/utils.h>
+
+#include "../command.h"
+#include <lttng/rotation.h>
+
+static char *opt_session_name;
+static struct mi_writer *writer;
+
+enum {
+ OPT_HELP = 1,
+ OPT_LIST_OPTIONS,
+ OPT_TIMER,
+};
+
+static struct poptOption long_options[] = {
+ /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
+ {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
+ {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
+ {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0},
+ {"timer", 0, POPT_ARG_INT, 0, OPT_TIMER, 0, 0},
+ {0, 0, 0, 0, 0, 0, 0}
+};
+
+static int setup_rotate(char *session_name, uint64_t timer)
+{
+ int ret = 0;
+ struct lttng_rotation_schedule_attr *attr = NULL;
+
+ attr = lttng_rotation_schedule_attr_create();
+ if (!attr) {
+ goto error;
+ }
+
+ ret = lttng_rotation_schedule_attr_set_session_name(attr, session_name);
+ if (ret < 0) {
+ goto error;
+ }
+
+ if (lttng_opt_mi) {
+ /* Open rotation_schedule element */
+ ret = mi_lttng_writer_open_element(writer,
+ config_element_rotation_schedule);
+ if (ret) {
+ goto error;
+ }
+
+ ret = mi_lttng_writer_write_element_string(writer,
+ mi_lttng_element_session_name, session_name);
+ if (ret) {
+ goto error;
+ }
+ }
+
+ if (timer) {
+ lttng_rotation_schedule_attr_set_timer_period(attr, timer);
+ MSG("Configuring session %s to rotate every %" PRIu64 " us",
+ session_name, timer);
+ if (lttng_opt_mi) {
+ ret = mi_lttng_writer_write_element_unsigned_int(writer,
+ config_element_rotation_timer_interval, timer);
+ if (ret) {
+ goto end;
+ }
+ }
+ }
+
+ ret = lttng_rotation_set_schedule(attr);
+ if (ret) {
+ ERR("%s", lttng_strerror(ret));
+ if (lttng_opt_mi) {
+ ret = mi_lttng_writer_write_element_string(writer,
+ mi_lttng_element_rotate_status, "error");
+ if (ret) {
+ goto end;
+ }
+ /* Close rotation_schedule element */
+ ret = mi_lttng_writer_close_element(writer);
+ if (ret) {
+ goto end;
+ }
+ }
+ goto error;
+ }
+
+ if (lttng_opt_mi) {
+ ret = mi_lttng_writer_write_element_string(writer,
+ mi_lttng_element_rotate_status, "success");
+ if (ret) {
+ goto end;
+ }
+
+ /* Close rotation_schedule element */
+ ret = mi_lttng_writer_close_element(writer);
+ if (ret) {
+ goto end;
+ }
+ }
+
+ ret = 0;
+ goto end;
+
+error:
+ ret = -1;
+end:
+ return ret;
+}
+
+/*
+ * cmd_enable_rotation
+ *
+ * The 'enable-rotation <options>' first level command
+ */
+int cmd_enable_rotation(int argc, const char **argv)
+{
+ int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1;
+ int popt_ret;
+ static poptContext pc;
+ char *session_name = NULL;
+ char *opt_arg = NULL;
+ uint64_t timer = 0;
+ bool free_session_name = false;
+
+ pc = poptGetContext(NULL, argc, argv, long_options, 0);
+ popt_ret = poptReadDefaultConfig(pc, 0);
+ if (popt_ret) {
+ ret = CMD_ERROR;
+ ERR("poptReadDefaultConfig");
+ goto end;
+ }
+
+ while ((opt = poptGetNextOpt(pc)) != -1) {
+ switch (opt) {
+ case OPT_HELP:
+ SHOW_HELP();
+ goto end;
+ case OPT_LIST_OPTIONS:
+ list_cmd_options(stdout, long_options);
+ goto end;
+ case OPT_TIMER:
+ errno = 0;
+ opt_arg = poptGetOptArg(pc);
+ if (errno != 0 || !isdigit(opt_arg[0])) {
+ ERR("Wrong value for --timer option: %s", opt_arg);
+ ret = CMD_ERROR;
+ goto end;
+ }
+ if (utils_parse_time_suffix(opt_arg, &timer) < 0 || timer == 0) {
+ ERR("Wrong value for --timer option: %s", opt_arg);
+ ret = CMD_ERROR;
+ goto end;
+ }
+ DBG("Rotation timer set to %" PRIu64, timer);
+ break;
+ default:
+ ret = CMD_UNDEFINED;
+ goto end;
+ }
+ }
+
+ if (opt_session_name == NULL) {
+ session_name = get_session_name();
+ if (session_name == NULL) {
+ goto end;
+ }
+ free_session_name = true;
+ } else {
+ session_name = opt_session_name;
+ }
+
+ /* 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_rotation);
+ 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;
+ }
+ }
+
+ /* No config options, just rotate the session now */
+ if (timer == 0) {
+ ERR("No timer given");
+ success = 0;
+ command_ret = -1;
+ } else {
+ command_ret = setup_rotate(session_name, timer);
+ }
+
+ if (command_ret) {
+ ERR("%s", lttng_strerror(command_ret));
+ success = 0;
+ }
+
+ /* 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) {
+ ret = CMD_ERROR;
+ goto end;
+ }
+
+ /* Command element close */
+ ret = mi_lttng_writer_command_close(writer);
+ if (ret) {
+ ret = CMD_ERROR;
+ 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;
+ }
+
+ /* Overwrite ret if an error occurred with start_tracing */
+ ret = command_ret ? command_ret : ret;
+ poptFreeContext(pc);
+ if (free_session_name) {
+ free(session_name);
+ }
+ return ret;
+}
projects / lttng-tools.git / commitdiff
