| 1 | /* |
| 2 | * Copyright (C) 2017 Julien Desfossez <jdesfossez@efficios.com> |
| 3 | * |
| 4 | * SPDX-License-Identifier: GPL-2.0-only |
| 5 | * |
| 6 | */ |
| 7 | |
| 8 | #define _LGPL_SOURCE |
| 9 | #include "../command.hpp" |
| 10 | |
| 11 | #include <common/mi-lttng.hpp> |
| 12 | #include <common/sessiond-comm/sessiond-comm.hpp> |
| 13 | |
| 14 | #include <lttng/lttng.h> |
| 15 | |
| 16 | #include <ctype.h> |
| 17 | #include <inttypes.h> |
| 18 | #include <popt.h> |
| 19 | #include <stdio.h> |
| 20 | #include <stdlib.h> |
| 21 | #include <string.h> |
| 22 | #include <sys/stat.h> |
| 23 | #include <sys/types.h> |
| 24 | #include <unistd.h> |
| 25 | |
| 26 | static int opt_no_wait; |
| 27 | static struct mi_writer *writer; |
| 28 | |
| 29 | #ifdef LTTNG_EMBED_HELP |
| 30 | static const char help_msg[] = |
| 31 | #include <lttng-rotate.1.h> |
| 32 | ; |
| 33 | #endif |
| 34 | |
| 35 | enum { |
| 36 | OPT_HELP = 1, |
| 37 | OPT_LIST_OPTIONS, |
| 38 | }; |
| 39 | |
| 40 | static struct poptOption long_options[] = { |
| 41 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ |
| 42 | { "help", 'h', POPT_ARG_NONE, nullptr, OPT_HELP, nullptr, nullptr }, |
| 43 | { "list-options", 0, POPT_ARG_NONE, nullptr, OPT_LIST_OPTIONS, nullptr, nullptr }, |
| 44 | { "no-wait", 'n', POPT_ARG_VAL, &opt_no_wait, 1, nullptr, nullptr }, |
| 45 | { nullptr, 0, 0, nullptr, 0, nullptr, nullptr } |
| 46 | }; |
| 47 | |
| 48 | static int rotate_tracing(char *session_name) |
| 49 | { |
| 50 | int ret; |
| 51 | enum cmd_error_code cmd_ret = CMD_SUCCESS; |
| 52 | struct lttng_rotation_handle *handle = nullptr; |
| 53 | enum lttng_rotation_status rotation_status; |
| 54 | enum lttng_rotation_state rotation_state = LTTNG_ROTATION_STATE_ONGOING; |
| 55 | const struct lttng_trace_archive_location *location = nullptr; |
| 56 | bool print_location = true; |
| 57 | |
| 58 | DBG("Rotating the output files of session %s", session_name); |
| 59 | |
| 60 | ret = lttng_rotate_session(session_name, nullptr, &handle); |
| 61 | if (ret < 0) { |
| 62 | switch (-ret) { |
| 63 | case LTTNG_ERR_SESSION_NOT_STARTED: |
| 64 | WARN("Tracing session %s not started yet", session_name); |
| 65 | cmd_ret = CMD_WARNING; |
| 66 | goto end; |
| 67 | default: |
| 68 | ERR("%s", lttng_strerror(ret)); |
| 69 | goto error; |
| 70 | } |
| 71 | } |
| 72 | |
| 73 | if (opt_no_wait) { |
| 74 | rotation_state = LTTNG_ROTATION_STATE_ONGOING; |
| 75 | goto skip_wait; |
| 76 | } |
| 77 | |
| 78 | _MSG("Waiting for rotation to complete"); |
| 79 | ret = fflush(stdout); |
| 80 | if (ret) { |
| 81 | PERROR("fflush"); |
| 82 | goto error; |
| 83 | } |
| 84 | |
| 85 | do { |
| 86 | rotation_status = lttng_rotation_handle_get_state(handle, &rotation_state); |
| 87 | if (rotation_status != LTTNG_ROTATION_STATUS_OK) { |
| 88 | MSG(""); |
| 89 | ERR("Failed to query the state of the rotation."); |
| 90 | goto error; |
| 91 | } |
| 92 | |
| 93 | if (rotation_state == LTTNG_ROTATION_STATE_ONGOING) { |
| 94 | ret = usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US); |
| 95 | if (ret) { |
| 96 | PERROR("\nusleep"); |
| 97 | goto error; |
| 98 | } |
| 99 | _MSG("."); |
| 100 | |
| 101 | ret = fflush(stdout); |
| 102 | if (ret) { |
| 103 | PERROR("\nfflush"); |
| 104 | goto error; |
| 105 | } |
| 106 | } |
| 107 | } while (rotation_state == LTTNG_ROTATION_STATE_ONGOING); |
| 108 | MSG(""); |
| 109 | |
| 110 | skip_wait: |
| 111 | switch (rotation_state) { |
| 112 | case LTTNG_ROTATION_STATE_COMPLETED: |
| 113 | rotation_status = lttng_rotation_handle_get_archive_location(handle, &location); |
| 114 | if (rotation_status != LTTNG_ROTATION_STATUS_OK) { |
| 115 | ERR("Failed to retrieve the rotation's completed chunk archive location."); |
| 116 | cmd_ret = CMD_ERROR; |
| 117 | } |
| 118 | break; |
| 119 | case LTTNG_ROTATION_STATE_EXPIRED: |
| 120 | break; |
| 121 | case LTTNG_ROTATION_STATE_ERROR: |
| 122 | ERR("Failed to retrieve rotation state."); |
| 123 | goto error; |
| 124 | case LTTNG_ROTATION_STATE_ONGOING: |
| 125 | MSG("Rotation ongoing for session %s", session_name); |
| 126 | print_location = false; |
| 127 | break; |
| 128 | default: |
| 129 | ERR("Unexpected rotation state encountered."); |
| 130 | goto error; |
| 131 | } |
| 132 | |
| 133 | if (!lttng_opt_mi && print_location) { |
| 134 | ret = print_trace_archive_location(location, session_name); |
| 135 | } else if (lttng_opt_mi) { |
| 136 | ret = mi_lttng_rotate(writer, session_name, rotation_state, location); |
| 137 | } |
| 138 | |
| 139 | if (ret < 0) { |
| 140 | cmd_ret = CMD_ERROR; |
| 141 | } |
| 142 | |
| 143 | end: |
| 144 | lttng_rotation_handle_destroy(handle); |
| 145 | return cmd_ret; |
| 146 | error: |
| 147 | cmd_ret = CMD_ERROR; |
| 148 | goto end; |
| 149 | } |
| 150 | |
| 151 | /* |
| 152 | * cmd_rotate |
| 153 | * |
| 154 | * The 'rotate <options>' first level command |
| 155 | */ |
| 156 | int cmd_rotate(int argc, const char **argv) |
| 157 | { |
| 158 | int opt, ret; |
| 159 | enum cmd_error_code cmd_ret = CMD_SUCCESS; |
| 160 | int popt_ret; |
| 161 | static poptContext pc; |
| 162 | const char *arg_session_name = nullptr; |
| 163 | char *session_name = nullptr; |
| 164 | |
| 165 | pc = poptGetContext(nullptr, argc, argv, long_options, 0); |
| 166 | popt_ret = poptReadDefaultConfig(pc, 0); |
| 167 | if (popt_ret) { |
| 168 | ERR("poptReadDefaultConfig"); |
| 169 | cmd_ret = CMD_ERROR; |
| 170 | goto end; |
| 171 | } |
| 172 | |
| 173 | while ((opt = poptGetNextOpt(pc)) != -1) { |
| 174 | switch (opt) { |
| 175 | case OPT_HELP: |
| 176 | SHOW_HELP(); |
| 177 | goto end; |
| 178 | case OPT_LIST_OPTIONS: |
| 179 | list_cmd_options(stdout, long_options); |
| 180 | goto end; |
| 181 | default: |
| 182 | cmd_ret = CMD_UNDEFINED; |
| 183 | goto end; |
| 184 | } |
| 185 | } |
| 186 | |
| 187 | arg_session_name = poptGetArg(pc); |
| 188 | if (arg_session_name == nullptr) { |
| 189 | session_name = get_session_name(); |
| 190 | } else { |
| 191 | session_name = strdup(arg_session_name); |
| 192 | if (session_name == nullptr) { |
| 193 | PERROR("Failed to copy session name"); |
| 194 | } |
| 195 | } |
| 196 | |
| 197 | if (session_name == nullptr) { |
| 198 | cmd_ret = CMD_ERROR; |
| 199 | goto end; |
| 200 | } |
| 201 | |
| 202 | /* Mi check */ |
| 203 | if (lttng_opt_mi) { |
| 204 | writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi); |
| 205 | if (!writer) { |
| 206 | cmd_ret = CMD_ERROR; |
| 207 | goto end; |
| 208 | } |
| 209 | |
| 210 | /* Open rotate command */ |
| 211 | ret = mi_lttng_writer_command_open(writer, mi_lttng_element_command_rotate); |
| 212 | if (ret) { |
| 213 | cmd_ret = CMD_ERROR; |
| 214 | goto end; |
| 215 | } |
| 216 | |
| 217 | /* Open output element */ |
| 218 | ret = mi_lttng_writer_open_element(writer, mi_lttng_element_command_output); |
| 219 | if (ret) { |
| 220 | cmd_ret = CMD_ERROR; |
| 221 | goto end; |
| 222 | } |
| 223 | } |
| 224 | |
| 225 | cmd_ret = (cmd_error_code) rotate_tracing(session_name); |
| 226 | |
| 227 | /* Mi closing */ |
| 228 | if (lttng_opt_mi) { |
| 229 | /* Close output element */ |
| 230 | ret = mi_lttng_writer_close_element(writer); |
| 231 | if (ret) { |
| 232 | cmd_ret = CMD_ERROR; |
| 233 | goto end; |
| 234 | } |
| 235 | /* Success ? */ |
| 236 | ret = mi_lttng_writer_write_element_bool( |
| 237 | writer, mi_lttng_element_command_success, cmd_ret == CMD_SUCCESS); |
| 238 | if (ret) { |
| 239 | cmd_ret = CMD_ERROR; |
| 240 | goto end; |
| 241 | } |
| 242 | |
| 243 | /* Command element close */ |
| 244 | ret = mi_lttng_writer_command_close(writer); |
| 245 | if (ret) { |
| 246 | cmd_ret = CMD_ERROR; |
| 247 | goto end; |
| 248 | } |
| 249 | } |
| 250 | |
| 251 | /* Mi clean-up */ |
| 252 | if (writer && mi_lttng_writer_destroy(writer)) { |
| 253 | cmd_ret = CMD_ERROR; |
| 254 | goto end; |
| 255 | } |
| 256 | end: |
| 257 | free(session_name); |
| 258 | poptFreeContext(pc); |
| 259 | |
| 260 | return cmd_ret; |
| 261 | } |