| 1 | /* |
| 2 | * Copyright (C) 2017 - Julien Desfossez <jdesfossez@efficios.com> |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License, version 2 only, |
| 6 | * as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along |
| 14 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 16 | */ |
| 17 | |
| 18 | #define _LGPL_SOURCE |
| 19 | #include <popt.h> |
| 20 | #include <stdio.h> |
| 21 | #include <stdlib.h> |
| 22 | #include <string.h> |
| 23 | #include <sys/stat.h> |
| 24 | #include <sys/types.h> |
| 25 | #include <unistd.h> |
| 26 | #include <inttypes.h> |
| 27 | #include <ctype.h> |
| 28 | |
| 29 | #include <common/sessiond-comm/sessiond-comm.h> |
| 30 | #include <common/mi-lttng.h> |
| 31 | #include <common/utils.h> |
| 32 | |
| 33 | #include "../command.h" |
| 34 | #include <lttng/rotation.h> |
| 35 | |
| 36 | static char *opt_session_name; |
| 37 | static struct mi_writer *writer; |
| 38 | |
| 39 | #ifdef LTTNG_EMBED_HELP |
| 40 | static const char help_msg[] = |
| 41 | #include <lttng-enable-rotation.1.h> |
| 42 | ; |
| 43 | #endif |
| 44 | |
| 45 | enum { |
| 46 | OPT_HELP = 1, |
| 47 | OPT_LIST_OPTIONS, |
| 48 | OPT_TIMER, |
| 49 | OPT_SIZE, |
| 50 | }; |
| 51 | |
| 52 | static struct poptOption long_options[] = { |
| 53 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ |
| 54 | {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0}, |
| 55 | {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL}, |
| 56 | {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0}, |
| 57 | {"timer", 0, POPT_ARG_INT, 0, OPT_TIMER, 0, 0}, |
| 58 | {"size", 0, POPT_ARG_INT, 0, OPT_SIZE, 0, 0}, |
| 59 | {0, 0, 0, 0, 0, 0, 0} |
| 60 | }; |
| 61 | |
| 62 | static int setup_rotate(char *session_name, uint64_t timer, uint64_t size) |
| 63 | { |
| 64 | int ret = 0; |
| 65 | struct lttng_rotation_schedule_attr *attr = NULL; |
| 66 | |
| 67 | attr = lttng_rotation_schedule_attr_create(); |
| 68 | if (!attr) { |
| 69 | goto error; |
| 70 | } |
| 71 | |
| 72 | ret = lttng_rotation_schedule_attr_set_session_name(attr, session_name); |
| 73 | if (ret < 0) { |
| 74 | goto error; |
| 75 | } |
| 76 | |
| 77 | if (lttng_opt_mi) { |
| 78 | /* Open rotation_schedule element */ |
| 79 | ret = mi_lttng_writer_open_element(writer, |
| 80 | config_element_rotation_schedule); |
| 81 | if (ret) { |
| 82 | goto error; |
| 83 | } |
| 84 | |
| 85 | ret = mi_lttng_writer_write_element_string(writer, |
| 86 | mi_lttng_element_session_name, session_name); |
| 87 | if (ret) { |
| 88 | goto error; |
| 89 | } |
| 90 | } |
| 91 | |
| 92 | if (timer) { |
| 93 | lttng_rotation_schedule_attr_set_timer_period(attr, timer); |
| 94 | MSG("Configuring session %s to rotate every %" PRIu64 " us", |
| 95 | session_name, timer); |
| 96 | if (lttng_opt_mi) { |
| 97 | ret = mi_lttng_writer_write_element_unsigned_int(writer, |
| 98 | config_element_rotation_timer_interval, timer); |
| 99 | if (ret) { |
| 100 | goto end; |
| 101 | } |
| 102 | } |
| 103 | } |
| 104 | if (size) { |
| 105 | lttng_rotation_schedule_attr_set_size(attr, size); |
| 106 | MSG("Configuring session %s to rotate every %" PRIu64 " bytes written", |
| 107 | session_name, size); |
| 108 | if (lttng_opt_mi) { |
| 109 | ret = mi_lttng_writer_write_element_unsigned_int(writer, |
| 110 | config_element_rotation_size, size); |
| 111 | if (ret) { |
| 112 | goto end; |
| 113 | } |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | ret = lttng_rotation_set_schedule(attr); |
| 118 | if (ret) { |
| 119 | ERR("%s", lttng_strerror(ret)); |
| 120 | if (lttng_opt_mi) { |
| 121 | ret = mi_lttng_writer_write_element_string(writer, |
| 122 | mi_lttng_element_rotate_status, "error"); |
| 123 | if (ret) { |
| 124 | goto end; |
| 125 | } |
| 126 | /* Close rotation_schedule element */ |
| 127 | ret = mi_lttng_writer_close_element(writer); |
| 128 | if (ret) { |
| 129 | goto end; |
| 130 | } |
| 131 | } |
| 132 | goto error; |
| 133 | } |
| 134 | |
| 135 | if (lttng_opt_mi) { |
| 136 | ret = mi_lttng_writer_write_element_string(writer, |
| 137 | mi_lttng_element_rotate_status, "success"); |
| 138 | if (ret) { |
| 139 | goto end; |
| 140 | } |
| 141 | |
| 142 | /* Close rotation_schedule element */ |
| 143 | ret = mi_lttng_writer_close_element(writer); |
| 144 | if (ret) { |
| 145 | goto end; |
| 146 | } |
| 147 | } |
| 148 | |
| 149 | ret = 0; |
| 150 | goto end; |
| 151 | |
| 152 | error: |
| 153 | ret = -1; |
| 154 | end: |
| 155 | lttng_rotation_schedule_attr_destroy(attr); |
| 156 | return ret; |
| 157 | } |
| 158 | |
| 159 | /* |
| 160 | * cmd_enable_rotation |
| 161 | * |
| 162 | * The 'enable-rotation <options>' first level command |
| 163 | */ |
| 164 | int cmd_enable_rotation(int argc, const char **argv) |
| 165 | { |
| 166 | int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1; |
| 167 | int popt_ret; |
| 168 | static poptContext pc; |
| 169 | char *session_name = NULL; |
| 170 | char *opt_arg = NULL; |
| 171 | bool free_session_name = false; |
| 172 | uint64_t timer = 0, size = 0; |
| 173 | |
| 174 | pc = poptGetContext(NULL, argc, argv, long_options, 0); |
| 175 | popt_ret = poptReadDefaultConfig(pc, 0); |
| 176 | if (popt_ret) { |
| 177 | ret = CMD_ERROR; |
| 178 | ERR("poptReadDefaultConfig"); |
| 179 | goto end; |
| 180 | } |
| 181 | |
| 182 | while ((opt = poptGetNextOpt(pc)) != -1) { |
| 183 | switch (opt) { |
| 184 | case OPT_HELP: |
| 185 | SHOW_HELP(); |
| 186 | goto end; |
| 187 | case OPT_LIST_OPTIONS: |
| 188 | list_cmd_options(stdout, long_options); |
| 189 | goto end; |
| 190 | case OPT_TIMER: |
| 191 | errno = 0; |
| 192 | opt_arg = poptGetOptArg(pc); |
| 193 | if (errno != 0 || !isdigit(opt_arg[0])) { |
| 194 | ERR("Wrong value for --timer option: %s", opt_arg); |
| 195 | ret = CMD_ERROR; |
| 196 | goto end; |
| 197 | } |
| 198 | if (utils_parse_time_suffix(opt_arg, &timer) < 0 || timer == 0) { |
| 199 | ERR("Wrong value for --timer option: %s", opt_arg); |
| 200 | ret = CMD_ERROR; |
| 201 | goto end; |
| 202 | } |
| 203 | DBG("Rotation timer set to %" PRIu64, timer); |
| 204 | break; |
| 205 | case OPT_SIZE: |
| 206 | errno = 0; |
| 207 | opt_arg = poptGetOptArg(pc); |
| 208 | if (utils_parse_size_suffix(opt_arg, &size) < 0 || !size) { |
| 209 | ERR("Wrong value for --size option: %s", opt_arg); |
| 210 | ret = CMD_ERROR; |
| 211 | goto end; |
| 212 | } |
| 213 | DBG("Rotation size set to %" PRIu64, size); |
| 214 | break; |
| 215 | default: |
| 216 | ret = CMD_UNDEFINED; |
| 217 | goto end; |
| 218 | } |
| 219 | } |
| 220 | |
| 221 | if (opt_session_name == NULL) { |
| 222 | session_name = get_session_name(); |
| 223 | if (session_name == NULL) { |
| 224 | goto end; |
| 225 | } |
| 226 | free_session_name = true; |
| 227 | } else { |
| 228 | session_name = opt_session_name; |
| 229 | } |
| 230 | |
| 231 | /* Mi check */ |
| 232 | if (lttng_opt_mi) { |
| 233 | writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi); |
| 234 | if (!writer) { |
| 235 | ret = -LTTNG_ERR_NOMEM; |
| 236 | goto end; |
| 237 | } |
| 238 | |
| 239 | /* Open command element */ |
| 240 | ret = mi_lttng_writer_command_open(writer, |
| 241 | mi_lttng_element_command_enable_rotation); |
| 242 | if (ret) { |
| 243 | ret = CMD_ERROR; |
| 244 | goto end; |
| 245 | } |
| 246 | |
| 247 | /* Open output element */ |
| 248 | ret = mi_lttng_writer_open_element(writer, |
| 249 | mi_lttng_element_command_output); |
| 250 | if (ret) { |
| 251 | ret = CMD_ERROR; |
| 252 | goto end; |
| 253 | } |
| 254 | } |
| 255 | |
| 256 | /* No config options, just rotate the session now */ |
| 257 | if (timer == 0 && size == 0) { |
| 258 | ERR("No timer or size given"); |
| 259 | success = 0; |
| 260 | command_ret = -1; |
| 261 | } else { |
| 262 | command_ret = setup_rotate(session_name, timer, size); |
| 263 | } |
| 264 | |
| 265 | if (command_ret) { |
| 266 | ERR("%s", lttng_strerror(command_ret)); |
| 267 | success = 0; |
| 268 | } |
| 269 | |
| 270 | /* Mi closing */ |
| 271 | if (lttng_opt_mi) { |
| 272 | /* Close output element */ |
| 273 | ret = mi_lttng_writer_close_element(writer); |
| 274 | if (ret) { |
| 275 | goto end; |
| 276 | } |
| 277 | /* Success ? */ |
| 278 | ret = mi_lttng_writer_write_element_bool(writer, |
| 279 | mi_lttng_element_command_success, success); |
| 280 | if (ret) { |
| 281 | ret = CMD_ERROR; |
| 282 | goto end; |
| 283 | } |
| 284 | |
| 285 | /* Command element close */ |
| 286 | ret = mi_lttng_writer_command_close(writer); |
| 287 | if (ret) { |
| 288 | ret = CMD_ERROR; |
| 289 | goto end; |
| 290 | } |
| 291 | } |
| 292 | |
| 293 | end: |
| 294 | /* Mi clean-up */ |
| 295 | if (writer && mi_lttng_writer_destroy(writer)) { |
| 296 | /* Preserve original error code */ |
| 297 | ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL; |
| 298 | } |
| 299 | |
| 300 | /* Overwrite ret if an error occurred with start_tracing */ |
| 301 | ret = command_ret ? command_ret : ret; |
| 302 | poptFreeContext(pc); |
| 303 | if (free_session_name) { |
| 304 | free(session_name); |
| 305 | } |
| 306 | return ret; |
| 307 | } |