| 1 | /* |
| 2 | * sg engine |
| 3 | * |
| 4 | * IO engine that uses the Linux SG v3 interface to talk to SCSI devices |
| 5 | * |
| 6 | */ |
| 7 | #include <stdio.h> |
| 8 | #include <stdlib.h> |
| 9 | #include <unistd.h> |
| 10 | #include <errno.h> |
| 11 | #include <assert.h> |
| 12 | #include <sys/poll.h> |
| 13 | |
| 14 | #include "../fio.h" |
| 15 | |
| 16 | #ifdef FIO_HAVE_SGIO |
| 17 | |
| 18 | #define MAX_10B_LBA 0xFFFFFFFFULL |
| 19 | #define SCSI_TIMEOUT_MS 30000 // 30 second timeout; currently no method to override |
| 20 | #define MAX_SB 64 // sense block maximum return size |
| 21 | |
| 22 | struct sgio_cmd { |
| 23 | unsigned char cdb[16]; // enhanced from 10 to support 16 byte commands |
| 24 | unsigned char sb[MAX_SB]; // add sense block to commands |
| 25 | int nr; |
| 26 | }; |
| 27 | |
| 28 | struct sgio_data { |
| 29 | struct sgio_cmd *cmds; |
| 30 | struct io_u **events; |
| 31 | struct pollfd *pfds; |
| 32 | int *fd_flags; |
| 33 | void *sgbuf; |
| 34 | unsigned int bs; |
| 35 | int type_checked; |
| 36 | }; |
| 37 | |
| 38 | static void sgio_hdr_init(struct sgio_data *sd, struct sg_io_hdr *hdr, |
| 39 | struct io_u *io_u, int fs) |
| 40 | { |
| 41 | struct sgio_cmd *sc = &sd->cmds[io_u->index]; |
| 42 | |
| 43 | memset(hdr, 0, sizeof(*hdr)); |
| 44 | memset(sc->cdb, 0, sizeof(sc->cdb)); |
| 45 | |
| 46 | hdr->interface_id = 'S'; |
| 47 | hdr->cmdp = sc->cdb; |
| 48 | hdr->cmd_len = sizeof(sc->cdb); |
| 49 | hdr->sbp = sc->sb; |
| 50 | hdr->mx_sb_len = sizeof(sc->sb); |
| 51 | hdr->pack_id = io_u->index; |
| 52 | hdr->usr_ptr = io_u; |
| 53 | |
| 54 | if (fs) { |
| 55 | hdr->dxferp = io_u->xfer_buf; |
| 56 | hdr->dxfer_len = io_u->xfer_buflen; |
| 57 | } |
| 58 | } |
| 59 | |
| 60 | static int pollin_events(struct pollfd *pfds, int fds) |
| 61 | { |
| 62 | int i; |
| 63 | |
| 64 | for (i = 0; i < fds; i++) |
| 65 | if (pfds[i].revents & POLLIN) |
| 66 | return 1; |
| 67 | |
| 68 | return 0; |
| 69 | } |
| 70 | |
| 71 | static int sg_fd_read(int fd, void *data, size_t size) |
| 72 | { |
| 73 | int err = 0; |
| 74 | |
| 75 | while (size) { |
| 76 | ssize_t ret; |
| 77 | |
| 78 | ret = read(fd, data, size); |
| 79 | if (ret < 0) { |
| 80 | if (errno == EAGAIN || errno == EINTR) |
| 81 | continue; |
| 82 | err = errno; |
| 83 | break; |
| 84 | } else if (!ret) |
| 85 | break; |
| 86 | else { |
| 87 | data += ret; |
| 88 | size -= ret; |
| 89 | } |
| 90 | } |
| 91 | |
| 92 | if (err) |
| 93 | return err; |
| 94 | if (size) |
| 95 | return EAGAIN; |
| 96 | |
| 97 | return 0; |
| 98 | } |
| 99 | |
| 100 | static int fio_sgio_getevents(struct thread_data *td, unsigned int min, |
| 101 | unsigned int max, |
| 102 | const struct timespec fio_unused *t) |
| 103 | { |
| 104 | struct sgio_data *sd = td->io_ops_data; |
| 105 | int left = max, eventNum, ret, r = 0; |
| 106 | void *buf = sd->sgbuf; |
| 107 | unsigned int i, events; |
| 108 | struct fio_file *f; |
| 109 | |
| 110 | /* |
| 111 | * Fill in the file descriptors |
| 112 | */ |
| 113 | for_each_file(td, f, i) { |
| 114 | /* |
| 115 | * don't block for min events == 0 |
| 116 | */ |
| 117 | if (!min) |
| 118 | sd->fd_flags[i] = fio_set_fd_nonblocking(f->fd, "sg"); |
| 119 | else |
| 120 | sd->fd_flags[i] = -1; |
| 121 | |
| 122 | sd->pfds[i].fd = f->fd; |
| 123 | sd->pfds[i].events = POLLIN; |
| 124 | } |
| 125 | |
| 126 | while (left) { |
| 127 | char *p; |
| 128 | |
| 129 | dprint(FD_IO, "sgio_getevents: sd %p: left=%d\n", sd, left); |
| 130 | |
| 131 | do { |
| 132 | if (!min) |
| 133 | break; |
| 134 | |
| 135 | ret = poll(sd->pfds, td->o.nr_files, -1); |
| 136 | if (ret < 0) { |
| 137 | if (!r) |
| 138 | r = -errno; |
| 139 | td_verror(td, errno, "poll"); |
| 140 | break; |
| 141 | } else if (!ret) |
| 142 | continue; |
| 143 | |
| 144 | if (pollin_events(sd->pfds, td->o.nr_files)) |
| 145 | break; |
| 146 | } while (1); |
| 147 | |
| 148 | if (r < 0) |
| 149 | break; |
| 150 | |
| 151 | re_read: |
| 152 | p = buf; |
| 153 | events = 0; |
| 154 | for_each_file(td, f, i) { |
| 155 | for (eventNum = 0; eventNum < left; eventNum++) { |
| 156 | ret = sg_fd_read(f->fd, p, sizeof(struct sg_io_hdr)); |
| 157 | dprint(FD_IO, "sgio_getevents: ret: %d\n", ret); |
| 158 | if (ret) { |
| 159 | r = -ret; |
| 160 | td_verror(td, r, "sg_read"); |
| 161 | break; |
| 162 | } |
| 163 | p += sizeof(struct sg_io_hdr); |
| 164 | events++; |
| 165 | dprint(FD_IO, "sgio_getevents: events: %d\n", events); |
| 166 | } |
| 167 | } |
| 168 | |
| 169 | if (r < 0 && !events) |
| 170 | break; |
| 171 | if (!events) { |
| 172 | usleep(1000); |
| 173 | goto re_read; |
| 174 | } |
| 175 | |
| 176 | left -= events; |
| 177 | r += events; |
| 178 | |
| 179 | for (i = 0; i < events; i++) { |
| 180 | struct sg_io_hdr *hdr = (struct sg_io_hdr *) buf + i; |
| 181 | sd->events[i] = hdr->usr_ptr; |
| 182 | |
| 183 | /* record if an io error occurred, ignore resid */ |
| 184 | if (hdr->info & SG_INFO_CHECK) { |
| 185 | struct io_u *io_u; |
| 186 | io_u = (struct io_u *)(hdr->usr_ptr); |
| 187 | memcpy(&io_u->hdr, hdr, sizeof(struct sg_io_hdr)); |
| 188 | sd->events[i]->error = EIO; |
| 189 | } |
| 190 | } |
| 191 | } |
| 192 | |
| 193 | if (!min) { |
| 194 | for_each_file(td, f, i) { |
| 195 | if (sd->fd_flags[i] == -1) |
| 196 | continue; |
| 197 | |
| 198 | if (fcntl(f->fd, F_SETFL, sd->fd_flags[i]) < 0) |
| 199 | log_err("fio: sg failed to restore fcntl flags: %s\n", strerror(errno)); |
| 200 | } |
| 201 | } |
| 202 | |
| 203 | return r; |
| 204 | } |
| 205 | |
| 206 | static int fio_sgio_ioctl_doio(struct thread_data *td, |
| 207 | struct fio_file *f, struct io_u *io_u) |
| 208 | { |
| 209 | struct sgio_data *sd = td->io_ops_data; |
| 210 | struct sg_io_hdr *hdr = &io_u->hdr; |
| 211 | int ret; |
| 212 | |
| 213 | sd->events[0] = io_u; |
| 214 | |
| 215 | ret = ioctl(f->fd, SG_IO, hdr); |
| 216 | if (ret < 0) |
| 217 | return ret; |
| 218 | |
| 219 | /* record if an io error occurred */ |
| 220 | if (hdr->info & SG_INFO_CHECK) |
| 221 | io_u->error = EIO; |
| 222 | |
| 223 | return FIO_Q_COMPLETED; |
| 224 | } |
| 225 | |
| 226 | static int fio_sgio_rw_doio(struct fio_file *f, struct io_u *io_u, int do_sync) |
| 227 | { |
| 228 | struct sg_io_hdr *hdr = &io_u->hdr; |
| 229 | int ret; |
| 230 | |
| 231 | ret = write(f->fd, hdr, sizeof(*hdr)); |
| 232 | if (ret < 0) |
| 233 | return ret; |
| 234 | |
| 235 | if (do_sync) { |
| 236 | ret = read(f->fd, hdr, sizeof(*hdr)); |
| 237 | if (ret < 0) |
| 238 | return ret; |
| 239 | |
| 240 | /* record if an io error occurred */ |
| 241 | if (hdr->info & SG_INFO_CHECK) |
| 242 | io_u->error = EIO; |
| 243 | |
| 244 | return FIO_Q_COMPLETED; |
| 245 | } |
| 246 | |
| 247 | return FIO_Q_QUEUED; |
| 248 | } |
| 249 | |
| 250 | static int fio_sgio_doio(struct thread_data *td, struct io_u *io_u, int do_sync) |
| 251 | { |
| 252 | struct fio_file *f = io_u->file; |
| 253 | int ret; |
| 254 | |
| 255 | if (f->filetype == FIO_TYPE_BLOCK) { |
| 256 | ret = fio_sgio_ioctl_doio(td, f, io_u); |
| 257 | td->error = io_u->error; |
| 258 | } else { |
| 259 | ret = fio_sgio_rw_doio(f, io_u, do_sync); |
| 260 | if (do_sync) |
| 261 | td->error = io_u->error; |
| 262 | } |
| 263 | |
| 264 | return ret; |
| 265 | } |
| 266 | |
| 267 | static int fio_sgio_prep(struct thread_data *td, struct io_u *io_u) |
| 268 | { |
| 269 | struct sg_io_hdr *hdr = &io_u->hdr; |
| 270 | struct sgio_data *sd = td->io_ops_data; |
| 271 | long long nr_blocks, lba; |
| 272 | |
| 273 | if (io_u->xfer_buflen & (sd->bs - 1)) { |
| 274 | log_err("read/write not sector aligned\n"); |
| 275 | return EINVAL; |
| 276 | } |
| 277 | |
| 278 | nr_blocks = io_u->xfer_buflen / sd->bs; |
| 279 | lba = io_u->offset / sd->bs; |
| 280 | |
| 281 | if (io_u->ddir == DDIR_READ) { |
| 282 | sgio_hdr_init(sd, hdr, io_u, 1); |
| 283 | |
| 284 | hdr->dxfer_direction = SG_DXFER_FROM_DEV; |
| 285 | if (lba < MAX_10B_LBA) |
| 286 | hdr->cmdp[0] = 0x28; // read(10) |
| 287 | else |
| 288 | hdr->cmdp[0] = 0x88; // read(16) |
| 289 | } else if (io_u->ddir == DDIR_WRITE) { |
| 290 | sgio_hdr_init(sd, hdr, io_u, 1); |
| 291 | |
| 292 | hdr->dxfer_direction = SG_DXFER_TO_DEV; |
| 293 | if (lba < MAX_10B_LBA) |
| 294 | hdr->cmdp[0] = 0x2a; // write(10) |
| 295 | else |
| 296 | hdr->cmdp[0] = 0x8a; // write(16) |
| 297 | } else { |
| 298 | sgio_hdr_init(sd, hdr, io_u, 0); |
| 299 | hdr->dxfer_direction = SG_DXFER_NONE; |
| 300 | if (lba < MAX_10B_LBA) |
| 301 | hdr->cmdp[0] = 0x35; // synccache(10) |
| 302 | else |
| 303 | hdr->cmdp[0] = 0x91; // synccache(16) |
| 304 | } |
| 305 | |
| 306 | /* |
| 307 | * for synccache, we leave lba and length to 0 to sync all |
| 308 | * blocks on medium. |
| 309 | */ |
| 310 | if (hdr->dxfer_direction != SG_DXFER_NONE) { |
| 311 | if (lba < MAX_10B_LBA) { |
| 312 | hdr->cmdp[2] = (unsigned char) ((lba >> 24) & 0xff); |
| 313 | hdr->cmdp[3] = (unsigned char) ((lba >> 16) & 0xff); |
| 314 | hdr->cmdp[4] = (unsigned char) ((lba >> 8) & 0xff); |
| 315 | hdr->cmdp[5] = (unsigned char) (lba & 0xff); |
| 316 | hdr->cmdp[7] = (unsigned char) ((nr_blocks >> 8) & 0xff); |
| 317 | hdr->cmdp[8] = (unsigned char) (nr_blocks & 0xff); |
| 318 | } else { |
| 319 | hdr->cmdp[2] = (unsigned char) ((lba >> 56) & 0xff); |
| 320 | hdr->cmdp[3] = (unsigned char) ((lba >> 48) & 0xff); |
| 321 | hdr->cmdp[4] = (unsigned char) ((lba >> 40) & 0xff); |
| 322 | hdr->cmdp[5] = (unsigned char) ((lba >> 32) & 0xff); |
| 323 | hdr->cmdp[6] = (unsigned char) ((lba >> 24) & 0xff); |
| 324 | hdr->cmdp[7] = (unsigned char) ((lba >> 16) & 0xff); |
| 325 | hdr->cmdp[8] = (unsigned char) ((lba >> 8) & 0xff); |
| 326 | hdr->cmdp[9] = (unsigned char) (lba & 0xff); |
| 327 | hdr->cmdp[10] = (unsigned char) ((nr_blocks >> 32) & 0xff); |
| 328 | hdr->cmdp[11] = (unsigned char) ((nr_blocks >> 16) & 0xff); |
| 329 | hdr->cmdp[12] = (unsigned char) ((nr_blocks >> 8) & 0xff); |
| 330 | hdr->cmdp[13] = (unsigned char) (nr_blocks & 0xff); |
| 331 | } |
| 332 | } |
| 333 | |
| 334 | hdr->timeout = SCSI_TIMEOUT_MS; |
| 335 | return 0; |
| 336 | } |
| 337 | |
| 338 | static int fio_sgio_queue(struct thread_data *td, struct io_u *io_u) |
| 339 | { |
| 340 | struct sg_io_hdr *hdr = &io_u->hdr; |
| 341 | int ret, do_sync = 0; |
| 342 | |
| 343 | fio_ro_check(td, io_u); |
| 344 | |
| 345 | if (td->o.sync_io || td->o.odirect || ddir_sync(io_u->ddir)) |
| 346 | do_sync = 1; |
| 347 | |
| 348 | ret = fio_sgio_doio(td, io_u, do_sync); |
| 349 | |
| 350 | if (ret < 0) |
| 351 | io_u->error = errno; |
| 352 | else if (hdr->status) { |
| 353 | io_u->resid = hdr->resid; |
| 354 | io_u->error = EIO; |
| 355 | } |
| 356 | |
| 357 | if (io_u->error) { |
| 358 | td_verror(td, io_u->error, "xfer"); |
| 359 | return FIO_Q_COMPLETED; |
| 360 | } |
| 361 | |
| 362 | return ret; |
| 363 | } |
| 364 | |
| 365 | static struct io_u *fio_sgio_event(struct thread_data *td, int event) |
| 366 | { |
| 367 | struct sgio_data *sd = td->io_ops_data; |
| 368 | |
| 369 | return sd->events[event]; |
| 370 | } |
| 371 | |
| 372 | static int fio_sgio_read_capacity(struct thread_data *td, unsigned int *bs, |
| 373 | unsigned long long *max_lba) |
| 374 | { |
| 375 | /* |
| 376 | * need to do read capacity operation w/o benefit of sd or |
| 377 | * io_u structures, which are not initialized until later. |
| 378 | */ |
| 379 | struct sg_io_hdr hdr; |
| 380 | unsigned char cmd[16]; |
| 381 | unsigned char sb[64]; |
| 382 | unsigned char buf[32]; // read capacity return |
| 383 | int ret; |
| 384 | int fd = -1; |
| 385 | |
| 386 | struct fio_file *f = td->files[0]; |
| 387 | |
| 388 | /* open file independent of rest of application */ |
| 389 | fd = open(f->file_name, O_RDONLY); |
| 390 | if (fd < 0) |
| 391 | return -errno; |
| 392 | |
| 393 | memset(&hdr, 0, sizeof(hdr)); |
| 394 | memset(cmd, 0, sizeof(cmd)); |
| 395 | memset(sb, 0, sizeof(sb)); |
| 396 | memset(buf, 0, sizeof(buf)); |
| 397 | |
| 398 | /* First let's try a 10 byte read capacity. */ |
| 399 | hdr.interface_id = 'S'; |
| 400 | hdr.cmdp = cmd; |
| 401 | hdr.cmd_len = 10; |
| 402 | hdr.sbp = sb; |
| 403 | hdr.mx_sb_len = sizeof(sb); |
| 404 | hdr.timeout = SCSI_TIMEOUT_MS; |
| 405 | hdr.cmdp[0] = 0x25; // Read Capacity(10) |
| 406 | hdr.dxfer_direction = SG_DXFER_FROM_DEV; |
| 407 | hdr.dxferp = buf; |
| 408 | hdr.dxfer_len = sizeof(buf); |
| 409 | |
| 410 | ret = ioctl(fd, SG_IO, &hdr); |
| 411 | if (ret < 0) { |
| 412 | close(fd); |
| 413 | return ret; |
| 414 | } |
| 415 | |
| 416 | *bs = (buf[4] << 24) | (buf[5] << 16) | (buf[6] << 8) | buf[7]; |
| 417 | *max_lba = ((buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3]) & MAX_10B_LBA; // for some reason max_lba is being sign extended even though unsigned. |
| 418 | |
| 419 | /* |
| 420 | * If max lba masked by MAX_10B_LBA equals MAX_10B_LBA, |
| 421 | * then need to retry with 16 byte Read Capacity command. |
| 422 | */ |
| 423 | if (*max_lba == MAX_10B_LBA) { |
| 424 | hdr.cmd_len = 16; |
| 425 | hdr.cmdp[0] = 0x9e; // service action |
| 426 | hdr.cmdp[1] = 0x10; // Read Capacity(16) |
| 427 | hdr.cmdp[10] = (unsigned char) ((sizeof(buf) >> 24) & 0xff); |
| 428 | hdr.cmdp[11] = (unsigned char) ((sizeof(buf) >> 16) & 0xff); |
| 429 | hdr.cmdp[12] = (unsigned char) ((sizeof(buf) >> 8) & 0xff); |
| 430 | hdr.cmdp[13] = (unsigned char) (sizeof(buf) & 0xff); |
| 431 | |
| 432 | hdr.dxfer_direction = SG_DXFER_FROM_DEV; |
| 433 | hdr.dxferp = buf; |
| 434 | hdr.dxfer_len = sizeof(buf); |
| 435 | |
| 436 | ret = ioctl(fd, SG_IO, &hdr); |
| 437 | if (ret < 0) { |
| 438 | close(fd); |
| 439 | return ret; |
| 440 | } |
| 441 | |
| 442 | /* record if an io error occurred */ |
| 443 | if (hdr.info & SG_INFO_CHECK) |
| 444 | td_verror(td, EIO, "fio_sgio_read_capacity"); |
| 445 | |
| 446 | *bs = (buf[8] << 24) | (buf[9] << 16) | (buf[10] << 8) | buf[11]; |
| 447 | *max_lba = ((unsigned long long)buf[0] << 56) | |
| 448 | ((unsigned long long)buf[1] << 48) | |
| 449 | ((unsigned long long)buf[2] << 40) | |
| 450 | ((unsigned long long)buf[3] << 32) | |
| 451 | ((unsigned long long)buf[4] << 24) | |
| 452 | ((unsigned long long)buf[5] << 16) | |
| 453 | ((unsigned long long)buf[6] << 8) | |
| 454 | (unsigned long long)buf[7]; |
| 455 | } |
| 456 | |
| 457 | close(fd); |
| 458 | return 0; |
| 459 | } |
| 460 | |
| 461 | static void fio_sgio_cleanup(struct thread_data *td) |
| 462 | { |
| 463 | struct sgio_data *sd = td->io_ops_data; |
| 464 | |
| 465 | if (sd) { |
| 466 | free(sd->events); |
| 467 | free(sd->cmds); |
| 468 | free(sd->fd_flags); |
| 469 | free(sd->pfds); |
| 470 | free(sd->sgbuf); |
| 471 | free(sd); |
| 472 | } |
| 473 | } |
| 474 | |
| 475 | static int fio_sgio_init(struct thread_data *td) |
| 476 | { |
| 477 | struct sgio_data *sd; |
| 478 | |
| 479 | sd = malloc(sizeof(*sd)); |
| 480 | memset(sd, 0, sizeof(*sd)); |
| 481 | sd->cmds = malloc(td->o.iodepth * sizeof(struct sgio_cmd)); |
| 482 | memset(sd->cmds, 0, td->o.iodepth * sizeof(struct sgio_cmd)); |
| 483 | sd->events = malloc(td->o.iodepth * sizeof(struct io_u *)); |
| 484 | memset(sd->events, 0, td->o.iodepth * sizeof(struct io_u *)); |
| 485 | sd->pfds = malloc(sizeof(struct pollfd) * td->o.nr_files); |
| 486 | memset(sd->pfds, 0, sizeof(struct pollfd) * td->o.nr_files); |
| 487 | sd->fd_flags = malloc(sizeof(int) * td->o.nr_files); |
| 488 | memset(sd->fd_flags, 0, sizeof(int) * td->o.nr_files); |
| 489 | sd->sgbuf = malloc(sizeof(struct sg_io_hdr) * td->o.iodepth); |
| 490 | memset(sd->sgbuf, 0, sizeof(struct sg_io_hdr) * td->o.iodepth); |
| 491 | sd->type_checked = 0; |
| 492 | td->io_ops_data = sd; |
| 493 | |
| 494 | /* |
| 495 | * we want to do it, regardless of whether odirect is set or not |
| 496 | */ |
| 497 | td->o.override_sync = 1; |
| 498 | return 0; |
| 499 | } |
| 500 | |
| 501 | static int fio_sgio_type_check(struct thread_data *td, struct fio_file *f) |
| 502 | { |
| 503 | struct sgio_data *sd = td->io_ops_data; |
| 504 | unsigned int bs = 0; |
| 505 | unsigned long long max_lba = 0; |
| 506 | |
| 507 | if (f->filetype == FIO_TYPE_BLOCK) { |
| 508 | if (ioctl(f->fd, BLKSSZGET, &bs) < 0) { |
| 509 | td_verror(td, errno, "ioctl"); |
| 510 | return 1; |
| 511 | } |
| 512 | } else if (f->filetype == FIO_TYPE_CHAR) { |
| 513 | int version, ret; |
| 514 | |
| 515 | if (ioctl(f->fd, SG_GET_VERSION_NUM, &version) < 0) { |
| 516 | td_verror(td, errno, "ioctl"); |
| 517 | return 1; |
| 518 | } |
| 519 | |
| 520 | ret = fio_sgio_read_capacity(td, &bs, &max_lba); |
| 521 | if (ret) { |
| 522 | td_verror(td, td->error, "fio_sgio_read_capacity"); |
| 523 | log_err("ioengine sg unable to read capacity successfully\n"); |
| 524 | return 1; |
| 525 | } |
| 526 | } else { |
| 527 | td_verror(td, EINVAL, "wrong file type"); |
| 528 | log_err("ioengine sg only works on block or character devices\n"); |
| 529 | return 1; |
| 530 | } |
| 531 | |
| 532 | sd->bs = bs; |
| 533 | // Determine size of commands needed based on max_lba |
| 534 | if (max_lba >= MAX_10B_LBA) { |
| 535 | dprint(FD_IO, "sgio_type_check: using 16 byte read/write " |
| 536 | "commands for lba above 0x%016llx/0x%016llx\n", |
| 537 | MAX_10B_LBA, max_lba); |
| 538 | } |
| 539 | |
| 540 | if (f->filetype == FIO_TYPE_BLOCK) { |
| 541 | td->io_ops->getevents = NULL; |
| 542 | td->io_ops->event = NULL; |
| 543 | } |
| 544 | sd->type_checked = 1; |
| 545 | |
| 546 | return 0; |
| 547 | } |
| 548 | |
| 549 | static int fio_sgio_open(struct thread_data *td, struct fio_file *f) |
| 550 | { |
| 551 | struct sgio_data *sd = td->io_ops_data; |
| 552 | int ret; |
| 553 | |
| 554 | ret = generic_open_file(td, f); |
| 555 | if (ret) |
| 556 | return ret; |
| 557 | |
| 558 | if (sd && !sd->type_checked && fio_sgio_type_check(td, f)) { |
| 559 | ret = generic_close_file(td, f); |
| 560 | return 1; |
| 561 | } |
| 562 | |
| 563 | return 0; |
| 564 | } |
| 565 | |
| 566 | /* |
| 567 | * Build an error string with details about the driver, host or scsi |
| 568 | * error contained in the sg header Caller will use as necessary. |
| 569 | */ |
| 570 | static char *fio_sgio_errdetails(struct io_u *io_u) |
| 571 | { |
| 572 | struct sg_io_hdr *hdr = &io_u->hdr; |
| 573 | #define MAXERRDETAIL 1024 |
| 574 | #define MAXMSGCHUNK 128 |
| 575 | char *msg, msgchunk[MAXMSGCHUNK]; |
| 576 | int i; |
| 577 | |
| 578 | msg = calloc(1, MAXERRDETAIL); |
| 579 | strcpy(msg, ""); |
| 580 | |
| 581 | /* |
| 582 | * can't seem to find sg_err.h, so I'll just echo the define values |
| 583 | * so others can search on internet to find clearer clues of meaning. |
| 584 | */ |
| 585 | if (hdr->info & SG_INFO_CHECK) { |
| 586 | if (hdr->host_status) { |
| 587 | snprintf(msgchunk, MAXMSGCHUNK, "SG Host Status: 0x%02x; ", hdr->host_status); |
| 588 | strlcat(msg, msgchunk, MAXERRDETAIL); |
| 589 | switch (hdr->host_status) { |
| 590 | case 0x01: |
| 591 | strlcat(msg, "SG_ERR_DID_NO_CONNECT", MAXERRDETAIL); |
| 592 | break; |
| 593 | case 0x02: |
| 594 | strlcat(msg, "SG_ERR_DID_BUS_BUSY", MAXERRDETAIL); |
| 595 | break; |
| 596 | case 0x03: |
| 597 | strlcat(msg, "SG_ERR_DID_TIME_OUT", MAXERRDETAIL); |
| 598 | break; |
| 599 | case 0x04: |
| 600 | strlcat(msg, "SG_ERR_DID_BAD_TARGET", MAXERRDETAIL); |
| 601 | break; |
| 602 | case 0x05: |
| 603 | strlcat(msg, "SG_ERR_DID_ABORT", MAXERRDETAIL); |
| 604 | break; |
| 605 | case 0x06: |
| 606 | strlcat(msg, "SG_ERR_DID_PARITY", MAXERRDETAIL); |
| 607 | break; |
| 608 | case 0x07: |
| 609 | strlcat(msg, "SG_ERR_DID_ERROR (internal error)", MAXERRDETAIL); |
| 610 | break; |
| 611 | case 0x08: |
| 612 | strlcat(msg, "SG_ERR_DID_RESET", MAXERRDETAIL); |
| 613 | break; |
| 614 | case 0x09: |
| 615 | strlcat(msg, "SG_ERR_DID_BAD_INTR (unexpected)", MAXERRDETAIL); |
| 616 | break; |
| 617 | case 0x0a: |
| 618 | strlcat(msg, "SG_ERR_DID_PASSTHROUGH", MAXERRDETAIL); |
| 619 | break; |
| 620 | case 0x0b: |
| 621 | strlcat(msg, "SG_ERR_DID_SOFT_ERROR (driver retry?)", MAXERRDETAIL); |
| 622 | break; |
| 623 | case 0x0c: |
| 624 | strlcat(msg, "SG_ERR_DID_IMM_RETRY", MAXERRDETAIL); |
| 625 | break; |
| 626 | case 0x0d: |
| 627 | strlcat(msg, "SG_ERR_DID_REQUEUE", MAXERRDETAIL); |
| 628 | break; |
| 629 | case 0x0e: |
| 630 | strlcat(msg, "SG_ERR_DID_TRANSPORT_DISRUPTED", MAXERRDETAIL); |
| 631 | break; |
| 632 | case 0x0f: |
| 633 | strlcat(msg, "SG_ERR_DID_TRANSPORT_FAILFAST", MAXERRDETAIL); |
| 634 | break; |
| 635 | case 0x10: |
| 636 | strlcat(msg, "SG_ERR_DID_TARGET_FAILURE", MAXERRDETAIL); |
| 637 | break; |
| 638 | case 0x11: |
| 639 | strlcat(msg, "SG_ERR_DID_NEXUS_FAILURE", MAXERRDETAIL); |
| 640 | break; |
| 641 | case 0x12: |
| 642 | strlcat(msg, "SG_ERR_DID_ALLOC_FAILURE", MAXERRDETAIL); |
| 643 | break; |
| 644 | case 0x13: |
| 645 | strlcat(msg, "SG_ERR_DID_MEDIUM_ERROR", MAXERRDETAIL); |
| 646 | break; |
| 647 | default: |
| 648 | strlcat(msg, "Unknown", MAXERRDETAIL); |
| 649 | break; |
| 650 | } |
| 651 | strlcat(msg, ". ", MAXERRDETAIL); |
| 652 | } |
| 653 | if (hdr->driver_status) { |
| 654 | snprintf(msgchunk, MAXMSGCHUNK, "SG Driver Status: 0x%02x; ", hdr->driver_status); |
| 655 | strlcat(msg, msgchunk, MAXERRDETAIL); |
| 656 | switch (hdr->driver_status & 0x0F) { |
| 657 | case 0x01: |
| 658 | strlcat(msg, "SG_ERR_DRIVER_BUSY", MAXERRDETAIL); |
| 659 | break; |
| 660 | case 0x02: |
| 661 | strlcat(msg, "SG_ERR_DRIVER_SOFT", MAXERRDETAIL); |
| 662 | break; |
| 663 | case 0x03: |
| 664 | strlcat(msg, "SG_ERR_DRIVER_MEDIA", MAXERRDETAIL); |
| 665 | break; |
| 666 | case 0x04: |
| 667 | strlcat(msg, "SG_ERR_DRIVER_ERROR", MAXERRDETAIL); |
| 668 | break; |
| 669 | case 0x05: |
| 670 | strlcat(msg, "SG_ERR_DRIVER_INVALID", MAXERRDETAIL); |
| 671 | break; |
| 672 | case 0x06: |
| 673 | strlcat(msg, "SG_ERR_DRIVER_TIMEOUT", MAXERRDETAIL); |
| 674 | break; |
| 675 | case 0x07: |
| 676 | strlcat(msg, "SG_ERR_DRIVER_HARD", MAXERRDETAIL); |
| 677 | break; |
| 678 | case 0x08: |
| 679 | strlcat(msg, "SG_ERR_DRIVER_SENSE", MAXERRDETAIL); |
| 680 | break; |
| 681 | default: |
| 682 | strlcat(msg, "Unknown", MAXERRDETAIL); |
| 683 | break; |
| 684 | } |
| 685 | strlcat(msg, "; ", MAXERRDETAIL); |
| 686 | switch (hdr->driver_status & 0xF0) { |
| 687 | case 0x10: |
| 688 | strlcat(msg, "SG_ERR_SUGGEST_RETRY", MAXERRDETAIL); |
| 689 | break; |
| 690 | case 0x20: |
| 691 | strlcat(msg, "SG_ERR_SUGGEST_ABORT", MAXERRDETAIL); |
| 692 | break; |
| 693 | case 0x30: |
| 694 | strlcat(msg, "SG_ERR_SUGGEST_REMAP", MAXERRDETAIL); |
| 695 | break; |
| 696 | case 0x40: |
| 697 | strlcat(msg, "SG_ERR_SUGGEST_DIE", MAXERRDETAIL); |
| 698 | break; |
| 699 | case 0x80: |
| 700 | strlcat(msg, "SG_ERR_SUGGEST_SENSE", MAXERRDETAIL); |
| 701 | break; |
| 702 | } |
| 703 | strlcat(msg, ". ", MAXERRDETAIL); |
| 704 | } |
| 705 | if (hdr->status) { |
| 706 | snprintf(msgchunk, MAXMSGCHUNK, "SG SCSI Status: 0x%02x; ", hdr->status); |
| 707 | strlcat(msg, msgchunk, MAXERRDETAIL); |
| 708 | // SCSI 3 status codes |
| 709 | switch (hdr->status) { |
| 710 | case 0x02: |
| 711 | strlcat(msg, "CHECK_CONDITION", MAXERRDETAIL); |
| 712 | break; |
| 713 | case 0x04: |
| 714 | strlcat(msg, "CONDITION_MET", MAXERRDETAIL); |
| 715 | break; |
| 716 | case 0x08: |
| 717 | strlcat(msg, "BUSY", MAXERRDETAIL); |
| 718 | break; |
| 719 | case 0x10: |
| 720 | strlcat(msg, "INTERMEDIATE", MAXERRDETAIL); |
| 721 | break; |
| 722 | case 0x14: |
| 723 | strlcat(msg, "INTERMEDIATE_CONDITION_MET", MAXERRDETAIL); |
| 724 | break; |
| 725 | case 0x18: |
| 726 | strlcat(msg, "RESERVATION_CONFLICT", MAXERRDETAIL); |
| 727 | break; |
| 728 | case 0x22: |
| 729 | strlcat(msg, "COMMAND_TERMINATED", MAXERRDETAIL); |
| 730 | break; |
| 731 | case 0x28: |
| 732 | strlcat(msg, "TASK_SET_FULL", MAXERRDETAIL); |
| 733 | break; |
| 734 | case 0x30: |
| 735 | strlcat(msg, "ACA_ACTIVE", MAXERRDETAIL); |
| 736 | break; |
| 737 | case 0x40: |
| 738 | strlcat(msg, "TASK_ABORTED", MAXERRDETAIL); |
| 739 | break; |
| 740 | default: |
| 741 | strlcat(msg, "Unknown", MAXERRDETAIL); |
| 742 | break; |
| 743 | } |
| 744 | strlcat(msg, ". ", MAXERRDETAIL); |
| 745 | } |
| 746 | if (hdr->sb_len_wr) { |
| 747 | snprintf(msgchunk, MAXMSGCHUNK, "Sense Data (%d bytes):", hdr->sb_len_wr); |
| 748 | strlcat(msg, msgchunk, MAXERRDETAIL); |
| 749 | for (i = 0; i < hdr->sb_len_wr; i++) { |
| 750 | snprintf(msgchunk, MAXMSGCHUNK, " %02x", hdr->sbp[i]); |
| 751 | strlcat(msg, msgchunk, MAXERRDETAIL); |
| 752 | } |
| 753 | strlcat(msg, ". ", MAXERRDETAIL); |
| 754 | } |
| 755 | if (hdr->resid != 0) { |
| 756 | snprintf(msgchunk, MAXMSGCHUNK, "SG Driver: %d bytes out of %d not transferred. ", hdr->resid, hdr->dxfer_len); |
| 757 | strlcat(msg, msgchunk, MAXERRDETAIL); |
| 758 | } |
| 759 | } |
| 760 | |
| 761 | if (!(hdr->info & SG_INFO_CHECK) && !strlen(msg)) |
| 762 | strncpy(msg, "SG Driver did not report a Host, Driver or Device check", |
| 763 | MAXERRDETAIL - 1); |
| 764 | |
| 765 | return msg; |
| 766 | } |
| 767 | |
| 768 | /* |
| 769 | * get max file size from read capacity. |
| 770 | */ |
| 771 | static int fio_sgio_get_file_size(struct thread_data *td, struct fio_file *f) |
| 772 | { |
| 773 | /* |
| 774 | * get_file_size is being called even before sgio_init is |
| 775 | * called, so none of the sg_io structures are |
| 776 | * initialized in the thread_data yet. So we need to do the |
| 777 | * ReadCapacity without any of those helpers. One of the effects |
| 778 | * is that ReadCapacity may get called 4 times on each open: |
| 779 | * readcap(10) followed by readcap(16) if needed - just to get |
| 780 | * the file size after the init occurs - it will be called |
| 781 | * again when "type_check" is called during structure |
| 782 | * initialization I'm not sure how to prevent this little |
| 783 | * inefficiency. |
| 784 | */ |
| 785 | unsigned int bs = 0; |
| 786 | unsigned long long max_lba = 0; |
| 787 | int ret; |
| 788 | |
| 789 | if (fio_file_size_known(f)) |
| 790 | return 0; |
| 791 | |
| 792 | if (f->filetype != FIO_TYPE_BLOCK && f->filetype != FIO_TYPE_CHAR) { |
| 793 | td_verror(td, EINVAL, "wrong file type"); |
| 794 | log_err("ioengine sg only works on block or character devices\n"); |
| 795 | return 1; |
| 796 | } |
| 797 | |
| 798 | ret = fio_sgio_read_capacity(td, &bs, &max_lba); |
| 799 | if (ret ) { |
| 800 | td_verror(td, td->error, "fio_sgio_read_capacity"); |
| 801 | log_err("ioengine sg unable to successfully execute read capacity to get block size and maximum lba\n"); |
| 802 | return 1; |
| 803 | } |
| 804 | |
| 805 | f->real_file_size = (max_lba + 1) * bs; |
| 806 | fio_file_set_size_known(f); |
| 807 | return 0; |
| 808 | } |
| 809 | |
| 810 | |
| 811 | static struct ioengine_ops ioengine = { |
| 812 | .name = "sg", |
| 813 | .version = FIO_IOOPS_VERSION, |
| 814 | .init = fio_sgio_init, |
| 815 | .prep = fio_sgio_prep, |
| 816 | .queue = fio_sgio_queue, |
| 817 | .getevents = fio_sgio_getevents, |
| 818 | .errdetails = fio_sgio_errdetails, |
| 819 | .event = fio_sgio_event, |
| 820 | .cleanup = fio_sgio_cleanup, |
| 821 | .open_file = fio_sgio_open, |
| 822 | .close_file = generic_close_file, |
| 823 | .get_file_size = fio_sgio_get_file_size, |
| 824 | .flags = FIO_SYNCIO | FIO_RAWIO, |
| 825 | }; |
| 826 | |
| 827 | #else /* FIO_HAVE_SGIO */ |
| 828 | |
| 829 | /* |
| 830 | * When we have a proper configure system in place, we simply wont build |
| 831 | * and install this io engine. For now install a crippled version that |
| 832 | * just complains and fails to load. |
| 833 | */ |
| 834 | static int fio_sgio_init(struct thread_data fio_unused *td) |
| 835 | { |
| 836 | log_err("fio: ioengine sg not available\n"); |
| 837 | return 1; |
| 838 | } |
| 839 | |
| 840 | static struct ioengine_ops ioengine = { |
| 841 | .name = "sg", |
| 842 | .version = FIO_IOOPS_VERSION, |
| 843 | .init = fio_sgio_init, |
| 844 | }; |
| 845 | |
| 846 | #endif |
| 847 | |
| 848 | static void fio_init fio_sgio_register(void) |
| 849 | { |
| 850 | register_ioengine(&ioengine); |
| 851 | } |
| 852 | |
| 853 | static void fio_exit fio_sgio_unregister(void) |
| 854 | { |
| 855 | unregister_ioengine(&ioengine); |
| 856 | } |