| 1 | /* |
| 2 | * libiscsi engine |
| 3 | * |
| 4 | * this engine read/write iscsi lun with libiscsi. |
| 5 | */ |
| 6 | |
| 7 | |
| 8 | #include "../fio.h" |
| 9 | #include "../optgroup.h" |
| 10 | |
| 11 | #include <stdlib.h> |
| 12 | #include <iscsi/iscsi.h> |
| 13 | #include <iscsi/scsi-lowlevel.h> |
| 14 | #include <poll.h> |
| 15 | |
| 16 | struct iscsi_lun; |
| 17 | struct iscsi_info; |
| 18 | |
| 19 | struct iscsi_task { |
| 20 | struct scsi_task *scsi_task; |
| 21 | struct iscsi_lun *iscsi_lun; |
| 22 | struct io_u *io_u; |
| 23 | }; |
| 24 | |
| 25 | struct iscsi_lun { |
| 26 | struct iscsi_info *iscsi_info; |
| 27 | struct iscsi_context *iscsi; |
| 28 | struct iscsi_url *url; |
| 29 | int block_size; |
| 30 | uint64_t num_blocks; |
| 31 | }; |
| 32 | |
| 33 | struct iscsi_info { |
| 34 | struct iscsi_lun **luns; |
| 35 | int nr_luns; |
| 36 | struct pollfd *pfds; |
| 37 | struct iscsi_task **complete_events; |
| 38 | int nr_events; |
| 39 | }; |
| 40 | |
| 41 | struct iscsi_options { |
| 42 | void *pad; |
| 43 | char *initiator; |
| 44 | }; |
| 45 | |
| 46 | static struct fio_option options[] = { |
| 47 | { |
| 48 | .name = "initiator", |
| 49 | .lname = "initiator", |
| 50 | .type = FIO_OPT_STR_STORE, |
| 51 | .off1 = offsetof(struct iscsi_options, initiator), |
| 52 | .def = "iqn.2019-04.org.fio:fio", |
| 53 | .help = "initiator name", |
| 54 | .category = FIO_OPT_C_ENGINE, |
| 55 | .group = FIO_OPT_G_ISCSI, |
| 56 | }, |
| 57 | |
| 58 | { |
| 59 | .name = NULL, |
| 60 | }, |
| 61 | }; |
| 62 | |
| 63 | static int fio_iscsi_setup_lun(struct iscsi_info *iscsi_info, |
| 64 | char *initiator, struct fio_file *f, int i) |
| 65 | { |
| 66 | struct iscsi_lun *iscsi_lun = NULL; |
| 67 | struct scsi_task *task = NULL; |
| 68 | struct scsi_readcapacity16 *rc16 = NULL; |
| 69 | int ret = 0; |
| 70 | |
| 71 | iscsi_lun = malloc(sizeof(struct iscsi_lun)); |
| 72 | memset(iscsi_lun, 0, sizeof(struct iscsi_lun)); |
| 73 | |
| 74 | iscsi_lun->iscsi_info = iscsi_info; |
| 75 | |
| 76 | iscsi_lun->url = iscsi_parse_full_url(NULL, f->file_name); |
| 77 | if (iscsi_lun->url == NULL) { |
| 78 | log_err("iscsi: failed to parse url: %s\n", f->file_name); |
| 79 | ret = EINVAL; |
| 80 | goto out; |
| 81 | } |
| 82 | |
| 83 | iscsi_lun->iscsi = iscsi_create_context(initiator); |
| 84 | if (iscsi_lun->iscsi == NULL) { |
| 85 | log_err("iscsi: failed to create iscsi context.\n"); |
| 86 | ret = 1; |
| 87 | goto out; |
| 88 | } |
| 89 | |
| 90 | if (iscsi_set_targetname(iscsi_lun->iscsi, iscsi_lun->url->target)) { |
| 91 | log_err("iscsi: failed to set target name.\n"); |
| 92 | ret = EINVAL; |
| 93 | goto out; |
| 94 | } |
| 95 | |
| 96 | if (iscsi_set_session_type(iscsi_lun->iscsi, ISCSI_SESSION_NORMAL) != 0) { |
| 97 | log_err("iscsi: failed to set session type.\n"); |
| 98 | ret = EINVAL; |
| 99 | goto out; |
| 100 | } |
| 101 | |
| 102 | if (iscsi_set_header_digest(iscsi_lun->iscsi, |
| 103 | ISCSI_HEADER_DIGEST_NONE_CRC32C) != 0) { |
| 104 | log_err("iscsi: failed to set header digest.\n"); |
| 105 | ret = EINVAL; |
| 106 | goto out; |
| 107 | } |
| 108 | |
| 109 | if (iscsi_full_connect_sync(iscsi_lun->iscsi, |
| 110 | iscsi_lun->url->portal, |
| 111 | iscsi_lun->url->lun)) { |
| 112 | log_err("sicsi: failed to connect to LUN : %s\n", |
| 113 | iscsi_get_error(iscsi_lun->iscsi)); |
| 114 | ret = EINVAL; |
| 115 | goto out; |
| 116 | } |
| 117 | |
| 118 | task = iscsi_readcapacity16_sync(iscsi_lun->iscsi, iscsi_lun->url->lun); |
| 119 | if (task == NULL || task->status != SCSI_STATUS_GOOD) { |
| 120 | log_err("iscsi: failed to send readcapacity command: %s\n", |
| 121 | iscsi_get_error(iscsi_lun->iscsi)); |
| 122 | ret = EINVAL; |
| 123 | goto out; |
| 124 | } |
| 125 | |
| 126 | rc16 = scsi_datain_unmarshall(task); |
| 127 | if (rc16 == NULL) { |
| 128 | log_err("iscsi: failed to unmarshal readcapacity16 data.\n"); |
| 129 | ret = EINVAL; |
| 130 | goto out; |
| 131 | } |
| 132 | |
| 133 | iscsi_lun->block_size = rc16->block_length; |
| 134 | iscsi_lun->num_blocks = rc16->returned_lba + 1; |
| 135 | |
| 136 | scsi_free_scsi_task(task); |
| 137 | task = NULL; |
| 138 | |
| 139 | f->real_file_size = iscsi_lun->num_blocks * iscsi_lun->block_size; |
| 140 | f->engine_data = iscsi_lun; |
| 141 | |
| 142 | iscsi_info->luns[i] = iscsi_lun; |
| 143 | iscsi_info->pfds[i].fd = iscsi_get_fd(iscsi_lun->iscsi); |
| 144 | |
| 145 | out: |
| 146 | if (task) { |
| 147 | scsi_free_scsi_task(task); |
| 148 | } |
| 149 | |
| 150 | if (ret && iscsi_lun) { |
| 151 | if (iscsi_lun->iscsi != NULL) { |
| 152 | if (iscsi_is_logged_in(iscsi_lun->iscsi)) { |
| 153 | iscsi_logout_sync(iscsi_lun->iscsi); |
| 154 | } |
| 155 | iscsi_destroy_context(iscsi_lun->iscsi); |
| 156 | } |
| 157 | free(iscsi_lun); |
| 158 | } |
| 159 | |
| 160 | return ret; |
| 161 | } |
| 162 | |
| 163 | static int fio_iscsi_setup(struct thread_data *td) |
| 164 | { |
| 165 | struct iscsi_options *options = td->eo; |
| 166 | struct iscsi_info *iscsi_info = NULL; |
| 167 | int ret = 0; |
| 168 | struct fio_file *f; |
| 169 | int i; |
| 170 | |
| 171 | iscsi_info = malloc(sizeof(struct iscsi_info)); |
| 172 | iscsi_info->nr_luns = td->o.nr_files; |
| 173 | iscsi_info->luns = calloc(iscsi_info->nr_luns, sizeof(struct iscsi_lun*)); |
| 174 | iscsi_info->pfds = calloc(iscsi_info->nr_luns, sizeof(struct pollfd)); |
| 175 | |
| 176 | iscsi_info->nr_events = 0; |
| 177 | iscsi_info->complete_events = calloc(td->o.iodepth, sizeof(struct iscsi_task*)); |
| 178 | |
| 179 | td->io_ops_data = iscsi_info; |
| 180 | |
| 181 | for_each_file(td, f, i) { |
| 182 | ret = fio_iscsi_setup_lun(iscsi_info, options->initiator, f, i); |
| 183 | if (ret < 0) break; |
| 184 | } |
| 185 | |
| 186 | return ret; |
| 187 | } |
| 188 | |
| 189 | static int fio_iscsi_init(struct thread_data *td) { |
| 190 | return 0; |
| 191 | } |
| 192 | |
| 193 | static void fio_iscsi_cleanup_lun(struct iscsi_lun *iscsi_lun) { |
| 194 | if (iscsi_lun->iscsi != NULL) { |
| 195 | if (iscsi_is_logged_in(iscsi_lun->iscsi)) { |
| 196 | iscsi_logout_sync(iscsi_lun->iscsi); |
| 197 | } |
| 198 | iscsi_destroy_context(iscsi_lun->iscsi); |
| 199 | } |
| 200 | free(iscsi_lun); |
| 201 | } |
| 202 | |
| 203 | static void fio_iscsi_cleanup(struct thread_data *td) |
| 204 | { |
| 205 | struct iscsi_info *iscsi_info = td->io_ops_data; |
| 206 | |
| 207 | for (int i = 0; i < iscsi_info->nr_luns; i++) { |
| 208 | if (iscsi_info->luns[i]) { |
| 209 | fio_iscsi_cleanup_lun(iscsi_info->luns[i]); |
| 210 | iscsi_info->luns[i] = NULL; |
| 211 | } |
| 212 | } |
| 213 | |
| 214 | free(iscsi_info->luns); |
| 215 | free(iscsi_info->pfds); |
| 216 | free(iscsi_info->complete_events); |
| 217 | free(iscsi_info); |
| 218 | } |
| 219 | |
| 220 | static int fio_iscsi_prep(struct thread_data *td, struct io_u *io_u) |
| 221 | { |
| 222 | return 0; |
| 223 | } |
| 224 | |
| 225 | static int fio_iscsi_open_file(struct thread_data *td, struct fio_file *f) |
| 226 | { |
| 227 | return 0; |
| 228 | } |
| 229 | |
| 230 | static int fio_iscsi_close_file(struct thread_data *td, struct fio_file *f) |
| 231 | { |
| 232 | return 0; |
| 233 | } |
| 234 | |
| 235 | static void iscsi_cb(struct iscsi_context *iscsi, int status, |
| 236 | void *command_data, void *private_data) |
| 237 | { |
| 238 | struct iscsi_task *iscsi_task = (struct iscsi_task*)private_data; |
| 239 | struct iscsi_lun *iscsi_lun = iscsi_task->iscsi_lun; |
| 240 | struct iscsi_info *iscsi_info = iscsi_lun->iscsi_info; |
| 241 | struct io_u *io_u = iscsi_task->io_u; |
| 242 | |
| 243 | if (status == SCSI_STATUS_GOOD) { |
| 244 | io_u->error = 0; |
| 245 | } else { |
| 246 | log_err("iscsi: request failed with error %s.\n", |
| 247 | iscsi_get_error(iscsi_lun->iscsi)); |
| 248 | |
| 249 | io_u->error = 1; |
| 250 | io_u->resid = io_u->xfer_buflen; |
| 251 | } |
| 252 | |
| 253 | iscsi_info->complete_events[iscsi_info->nr_events] = iscsi_task; |
| 254 | iscsi_info->nr_events++; |
| 255 | } |
| 256 | |
| 257 | static enum fio_q_status fio_iscsi_queue(struct thread_data *td, |
| 258 | struct io_u *io_u) |
| 259 | { |
| 260 | struct iscsi_lun *iscsi_lun = io_u->file->engine_data; |
| 261 | struct scsi_task *scsi_task = NULL; |
| 262 | struct iscsi_task *iscsi_task = malloc(sizeof(struct iscsi_task)); |
| 263 | int ret = -1; |
| 264 | |
| 265 | if (io_u->ddir == DDIR_READ || io_u->ddir == DDIR_WRITE) { |
| 266 | if (io_u->offset % iscsi_lun->block_size != 0) { |
| 267 | log_err("iscsi: offset is not align to block size.\n"); |
| 268 | ret = -1; |
| 269 | goto out; |
| 270 | } |
| 271 | |
| 272 | if (io_u->xfer_buflen % iscsi_lun->block_size != 0) { |
| 273 | log_err("iscsi: buflen is not align to block size.\n"); |
| 274 | ret = -1; |
| 275 | goto out; |
| 276 | } |
| 277 | } |
| 278 | |
| 279 | if (io_u->ddir == DDIR_READ) { |
| 280 | scsi_task = scsi_cdb_read16(io_u->offset / iscsi_lun->block_size, |
| 281 | io_u->xfer_buflen, |
| 282 | iscsi_lun->block_size, |
| 283 | 0, 0, 0, 0, 0); |
| 284 | ret = scsi_task_add_data_in_buffer(scsi_task, io_u->xfer_buflen, |
| 285 | io_u->xfer_buf); |
| 286 | if (ret < 0) { |
| 287 | log_err("iscsi: failed to add data in buffer.\n"); |
| 288 | goto out; |
| 289 | } |
| 290 | } else if (io_u->ddir == DDIR_WRITE) { |
| 291 | scsi_task = scsi_cdb_write16(io_u->offset / iscsi_lun->block_size, |
| 292 | io_u->xfer_buflen, |
| 293 | iscsi_lun->block_size, |
| 294 | 0, 0, 0, 0, 0); |
| 295 | ret = scsi_task_add_data_out_buffer(scsi_task, io_u->xfer_buflen, |
| 296 | io_u->xfer_buf); |
| 297 | if (ret < 0) { |
| 298 | log_err("iscsi: failed to add data out buffer.\n"); |
| 299 | goto out; |
| 300 | } |
| 301 | } else if (ddir_sync(io_u->ddir)) { |
| 302 | scsi_task = scsi_cdb_synchronizecache16( |
| 303 | 0, iscsi_lun->num_blocks * iscsi_lun->block_size, 0, 0); |
| 304 | } else { |
| 305 | log_err("iscsi: invalid I/O operation: %d\n", io_u->ddir); |
| 306 | ret = EINVAL; |
| 307 | goto out; |
| 308 | } |
| 309 | |
| 310 | iscsi_task->scsi_task = scsi_task; |
| 311 | iscsi_task->iscsi_lun = iscsi_lun; |
| 312 | iscsi_task->io_u = io_u; |
| 313 | |
| 314 | ret = iscsi_scsi_command_async(iscsi_lun->iscsi, iscsi_lun->url->lun, |
| 315 | scsi_task, iscsi_cb, NULL, iscsi_task); |
| 316 | if (ret < 0) { |
| 317 | log_err("iscsi: failed to send scsi command.\n"); |
| 318 | goto out; |
| 319 | } |
| 320 | |
| 321 | return FIO_Q_QUEUED; |
| 322 | |
| 323 | out: |
| 324 | if (iscsi_task) { |
| 325 | free(iscsi_task); |
| 326 | } |
| 327 | |
| 328 | if (scsi_task) { |
| 329 | scsi_free_scsi_task(scsi_task); |
| 330 | } |
| 331 | |
| 332 | if (ret) { |
| 333 | io_u->error = ret; |
| 334 | } |
| 335 | return FIO_Q_COMPLETED; |
| 336 | } |
| 337 | |
| 338 | static int fio_iscsi_getevents(struct thread_data *td, unsigned int min, |
| 339 | unsigned int max, const struct timespec *t) |
| 340 | { |
| 341 | struct iscsi_info *iscsi_info = td->io_ops_data; |
| 342 | int ret = 0; |
| 343 | |
| 344 | iscsi_info->nr_events = 0; |
| 345 | |
| 346 | while (iscsi_info->nr_events < min) { |
| 347 | for (int i = 0; i < iscsi_info->nr_luns; i++) { |
| 348 | int events = iscsi_which_events(iscsi_info->luns[i]->iscsi); |
| 349 | iscsi_info->pfds[i].events = events; |
| 350 | } |
| 351 | |
| 352 | ret = poll(iscsi_info->pfds, iscsi_info->nr_luns, -1); |
| 353 | if (ret < 0) { |
| 354 | if (errno == EINTR || errno == EAGAIN) { |
| 355 | continue; |
| 356 | } |
| 357 | log_err("iscsi: failed to poll events: %s.\n", |
| 358 | strerror(errno)); |
| 359 | break; |
| 360 | } |
| 361 | |
| 362 | for (int i = 0; i < iscsi_info->nr_luns; i++) { |
| 363 | ret = iscsi_service(iscsi_info->luns[i]->iscsi, |
| 364 | iscsi_info->pfds[i].revents); |
| 365 | assert(ret >= 0); |
| 366 | } |
| 367 | } |
| 368 | |
| 369 | return ret < 0 ? ret : iscsi_info->nr_events; |
| 370 | } |
| 371 | |
| 372 | static struct io_u *fio_iscsi_event(struct thread_data *td, int event) |
| 373 | { |
| 374 | struct iscsi_info *iscsi_info = (struct iscsi_info*)td->io_ops_data; |
| 375 | struct iscsi_task *iscsi_task = iscsi_info->complete_events[event]; |
| 376 | struct io_u *io_u = iscsi_task->io_u; |
| 377 | |
| 378 | iscsi_info->complete_events[event] = NULL; |
| 379 | |
| 380 | scsi_free_scsi_task(iscsi_task->scsi_task); |
| 381 | free(iscsi_task); |
| 382 | |
| 383 | return io_u; |
| 384 | } |
| 385 | |
| 386 | static struct ioengine_ops ioengine_iscsi = { |
| 387 | .name = "libiscsi", |
| 388 | .version = FIO_IOOPS_VERSION, |
| 389 | .flags = FIO_SYNCIO | FIO_DISKLESSIO | FIO_NODISKUTIL, |
| 390 | .setup = fio_iscsi_setup, |
| 391 | .init = fio_iscsi_init, |
| 392 | .prep = fio_iscsi_prep, |
| 393 | .queue = fio_iscsi_queue, |
| 394 | .getevents = fio_iscsi_getevents, |
| 395 | .event = fio_iscsi_event, |
| 396 | .cleanup = fio_iscsi_cleanup, |
| 397 | .open_file = fio_iscsi_open_file, |
| 398 | .close_file = fio_iscsi_close_file, |
| 399 | .option_struct_size = sizeof(struct iscsi_options), |
| 400 | .options = options, |
| 401 | }; |
| 402 | |
| 403 | static void fio_init fio_iscsi_register(void) |
| 404 | { |
| 405 | register_ioengine(&ioengine_iscsi); |
| 406 | } |
| 407 | |
| 408 | static void fio_exit fio_iscsi_unregister(void) |
| 409 | { |
| 410 | unregister_ioengine(&ioengine_iscsi); |
| 411 | } |