| 1 | /* |
| 2 | * Copyright (C) 2018 Western Digital Corporation or its affiliates. |
| 3 | * |
| 4 | * This file is released under the GPL. |
| 5 | */ |
| 6 | |
| 7 | #include <errno.h> |
| 8 | #include <string.h> |
| 9 | #include <stdlib.h> |
| 10 | #include <dirent.h> |
| 11 | #include <fcntl.h> |
| 12 | #include <sys/ioctl.h> |
| 13 | #include <sys/stat.h> |
| 14 | #include <unistd.h> |
| 15 | #include <linux/blkzoned.h> |
| 16 | #include "file.h" |
| 17 | #include "fio.h" |
| 18 | #include "lib/pow2.h" |
| 19 | #include "log.h" |
| 20 | #include "smalloc.h" |
| 21 | #include "verify.h" |
| 22 | #include "zbd.h" |
| 23 | |
| 24 | /** |
| 25 | * zbd_zone_idx - convert an offset into a zone number |
| 26 | * @f: file pointer. |
| 27 | * @offset: offset in bytes. If this offset is in the first zone_size bytes |
| 28 | * past the disk size then the index of the sentinel is returned. |
| 29 | */ |
| 30 | static uint32_t zbd_zone_idx(const struct fio_file *f, uint64_t offset) |
| 31 | { |
| 32 | uint32_t zone_idx; |
| 33 | |
| 34 | if (f->zbd_info->zone_size_log2 > 0) |
| 35 | zone_idx = offset >> f->zbd_info->zone_size_log2; |
| 36 | else |
| 37 | zone_idx = offset / f->zbd_info->zone_size; |
| 38 | |
| 39 | return min(zone_idx, f->zbd_info->nr_zones); |
| 40 | } |
| 41 | |
| 42 | /** |
| 43 | * zbd_zone_full - verify whether a minimum number of bytes remain in a zone |
| 44 | * @f: file pointer. |
| 45 | * @z: zone info pointer. |
| 46 | * @required: minimum number of bytes that must remain in a zone. |
| 47 | * |
| 48 | * The caller must hold z->mutex. |
| 49 | */ |
| 50 | static bool zbd_zone_full(const struct fio_file *f, struct fio_zone_info *z, |
| 51 | uint64_t required) |
| 52 | { |
| 53 | assert((required & 511) == 0); |
| 54 | |
| 55 | return z->type == BLK_ZONE_TYPE_SEQWRITE_REQ && |
| 56 | z->wp + required > z->start + f->zbd_info->zone_size; |
| 57 | } |
| 58 | |
| 59 | static bool is_valid_offset(const struct fio_file *f, uint64_t offset) |
| 60 | { |
| 61 | return (uint64_t)(offset - f->file_offset) < f->io_size; |
| 62 | } |
| 63 | |
| 64 | /* Verify whether direct I/O is used for all host-managed zoned drives. */ |
| 65 | static bool zbd_using_direct_io(void) |
| 66 | { |
| 67 | struct thread_data *td; |
| 68 | struct fio_file *f; |
| 69 | int i, j; |
| 70 | |
| 71 | for_each_td(td, i) { |
| 72 | if (td->o.odirect || !(td->o.td_ddir & TD_DDIR_WRITE)) |
| 73 | continue; |
| 74 | for_each_file(td, f, j) { |
| 75 | if (f->zbd_info && |
| 76 | f->zbd_info->model == ZBD_DM_HOST_MANAGED) |
| 77 | return false; |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | return true; |
| 82 | } |
| 83 | |
| 84 | /* Whether or not the I/O range for f includes one or more sequential zones */ |
| 85 | static bool zbd_is_seq_job(struct fio_file *f) |
| 86 | { |
| 87 | uint32_t zone_idx, zone_idx_b, zone_idx_e; |
| 88 | |
| 89 | assert(f->zbd_info); |
| 90 | if (f->io_size == 0) |
| 91 | return false; |
| 92 | zone_idx_b = zbd_zone_idx(f, f->file_offset); |
| 93 | zone_idx_e = zbd_zone_idx(f, f->file_offset + f->io_size - 1); |
| 94 | for (zone_idx = zone_idx_b; zone_idx <= zone_idx_e; zone_idx++) |
| 95 | if (f->zbd_info->zone_info[zone_idx].type == |
| 96 | BLK_ZONE_TYPE_SEQWRITE_REQ) |
| 97 | return true; |
| 98 | |
| 99 | return false; |
| 100 | } |
| 101 | |
| 102 | /* |
| 103 | * Verify whether offset and size parameters are aligned with zone boundaries. |
| 104 | */ |
| 105 | static bool zbd_verify_sizes(void) |
| 106 | { |
| 107 | const struct fio_zone_info *z; |
| 108 | struct thread_data *td; |
| 109 | struct fio_file *f; |
| 110 | uint64_t new_offset, new_end; |
| 111 | uint32_t zone_idx; |
| 112 | int i, j; |
| 113 | |
| 114 | for_each_td(td, i) { |
| 115 | for_each_file(td, f, j) { |
| 116 | if (!f->zbd_info) |
| 117 | continue; |
| 118 | if (f->file_offset >= f->real_file_size) |
| 119 | continue; |
| 120 | if (!zbd_is_seq_job(f)) |
| 121 | continue; |
| 122 | zone_idx = zbd_zone_idx(f, f->file_offset); |
| 123 | z = &f->zbd_info->zone_info[zone_idx]; |
| 124 | if (f->file_offset != z->start) { |
| 125 | new_offset = (z+1)->start; |
| 126 | if (new_offset >= f->file_offset + f->io_size) { |
| 127 | log_info("%s: io_size must be at least one zone\n", |
| 128 | f->file_name); |
| 129 | return false; |
| 130 | } |
| 131 | log_info("%s: rounded up offset from %lu to %lu\n", |
| 132 | f->file_name, f->file_offset, |
| 133 | new_offset); |
| 134 | f->io_size -= (new_offset - f->file_offset); |
| 135 | f->file_offset = new_offset; |
| 136 | } |
| 137 | zone_idx = zbd_zone_idx(f, f->file_offset + f->io_size); |
| 138 | z = &f->zbd_info->zone_info[zone_idx]; |
| 139 | new_end = z->start; |
| 140 | if (f->file_offset + f->io_size != new_end) { |
| 141 | if (new_end <= f->file_offset) { |
| 142 | log_info("%s: io_size must be at least one zone\n", |
| 143 | f->file_name); |
| 144 | return false; |
| 145 | } |
| 146 | log_info("%s: rounded down io_size from %lu to %lu\n", |
| 147 | f->file_name, f->io_size, |
| 148 | new_end - f->file_offset); |
| 149 | f->io_size = new_end - f->file_offset; |
| 150 | } |
| 151 | } |
| 152 | } |
| 153 | |
| 154 | return true; |
| 155 | } |
| 156 | |
| 157 | static bool zbd_verify_bs(void) |
| 158 | { |
| 159 | struct thread_data *td; |
| 160 | struct fio_file *f; |
| 161 | uint32_t zone_size; |
| 162 | int i, j, k; |
| 163 | |
| 164 | for_each_td(td, i) { |
| 165 | for_each_file(td, f, j) { |
| 166 | if (!f->zbd_info) |
| 167 | continue; |
| 168 | zone_size = f->zbd_info->zone_size; |
| 169 | for (k = 0; k < ARRAY_SIZE(td->o.bs); k++) { |
| 170 | if (td->o.verify != VERIFY_NONE && |
| 171 | zone_size % td->o.bs[k] != 0) { |
| 172 | log_info("%s: block size %llu is not a divisor of the zone size %d\n", |
| 173 | f->file_name, td->o.bs[k], |
| 174 | zone_size); |
| 175 | return false; |
| 176 | } |
| 177 | } |
| 178 | } |
| 179 | } |
| 180 | return true; |
| 181 | } |
| 182 | |
| 183 | /* |
| 184 | * Read zone information into @buf starting from sector @start_sector. |
| 185 | * @fd is a file descriptor that refers to a block device and @bufsz is the |
| 186 | * size of @buf. |
| 187 | * |
| 188 | * Returns 0 upon success and a negative error code upon failure. |
| 189 | */ |
| 190 | static int read_zone_info(int fd, uint64_t start_sector, |
| 191 | void *buf, unsigned int bufsz) |
| 192 | { |
| 193 | struct blk_zone_report *hdr = buf; |
| 194 | |
| 195 | if (bufsz < sizeof(*hdr)) |
| 196 | return -EINVAL; |
| 197 | |
| 198 | memset(hdr, 0, sizeof(*hdr)); |
| 199 | |
| 200 | hdr->nr_zones = (bufsz - sizeof(*hdr)) / sizeof(struct blk_zone); |
| 201 | hdr->sector = start_sector; |
| 202 | return ioctl(fd, BLKREPORTZONE, hdr) >= 0 ? 0 : -errno; |
| 203 | } |
| 204 | |
| 205 | /* |
| 206 | * Read up to 255 characters from the first line of a file. Strip the trailing |
| 207 | * newline. |
| 208 | */ |
| 209 | static char *read_file(const char *path) |
| 210 | { |
| 211 | char line[256], *p = line; |
| 212 | FILE *f; |
| 213 | |
| 214 | f = fopen(path, "rb"); |
| 215 | if (!f) |
| 216 | return NULL; |
| 217 | if (!fgets(line, sizeof(line), f)) |
| 218 | line[0] = '\0'; |
| 219 | strsep(&p, "\n"); |
| 220 | fclose(f); |
| 221 | |
| 222 | return strdup(line); |
| 223 | } |
| 224 | |
| 225 | static enum blk_zoned_model get_zbd_model(const char *file_name) |
| 226 | { |
| 227 | enum blk_zoned_model model = ZBD_DM_NONE; |
| 228 | char *zoned_attr_path = NULL; |
| 229 | char *model_str = NULL; |
| 230 | struct stat statbuf; |
| 231 | |
| 232 | if (stat(file_name, &statbuf) < 0) |
| 233 | goto out; |
| 234 | if (asprintf(&zoned_attr_path, "/sys/dev/block/%d:%d/queue/zoned", |
| 235 | major(statbuf.st_rdev), minor(statbuf.st_rdev)) < 0) |
| 236 | goto out; |
| 237 | model_str = read_file(zoned_attr_path); |
| 238 | if (!model_str) |
| 239 | goto out; |
| 240 | dprint(FD_ZBD, "%s: zbd model string: %s\n", file_name, model_str); |
| 241 | if (strcmp(model_str, "host-aware") == 0) |
| 242 | model = ZBD_DM_HOST_AWARE; |
| 243 | else if (strcmp(model_str, "host-managed") == 0) |
| 244 | model = ZBD_DM_HOST_MANAGED; |
| 245 | |
| 246 | out: |
| 247 | free(model_str); |
| 248 | free(zoned_attr_path); |
| 249 | return model; |
| 250 | } |
| 251 | |
| 252 | static int ilog2(uint64_t i) |
| 253 | { |
| 254 | int log = -1; |
| 255 | |
| 256 | while (i) { |
| 257 | i >>= 1; |
| 258 | log++; |
| 259 | } |
| 260 | return log; |
| 261 | } |
| 262 | |
| 263 | /* |
| 264 | * Initialize f->zbd_info for devices that are not zoned block devices. This |
| 265 | * allows to execute a ZBD workload against a non-ZBD device. |
| 266 | */ |
| 267 | static int init_zone_info(struct thread_data *td, struct fio_file *f) |
| 268 | { |
| 269 | uint32_t nr_zones; |
| 270 | struct fio_zone_info *p; |
| 271 | uint64_t zone_size; |
| 272 | struct zoned_block_device_info *zbd_info = NULL; |
| 273 | pthread_mutexattr_t attr; |
| 274 | int i; |
| 275 | |
| 276 | zone_size = td->o.zone_size; |
| 277 | assert(zone_size); |
| 278 | nr_zones = (f->real_file_size + zone_size - 1) / zone_size; |
| 279 | zbd_info = scalloc(1, sizeof(*zbd_info) + |
| 280 | (nr_zones + 1) * sizeof(zbd_info->zone_info[0])); |
| 281 | if (!zbd_info) |
| 282 | return -ENOMEM; |
| 283 | |
| 284 | pthread_mutexattr_init(&attr); |
| 285 | pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE); |
| 286 | pthread_mutexattr_setpshared(&attr, true); |
| 287 | pthread_mutex_init(&zbd_info->mutex, &attr); |
| 288 | zbd_info->refcount = 1; |
| 289 | p = &zbd_info->zone_info[0]; |
| 290 | for (i = 0; i < nr_zones; i++, p++) { |
| 291 | pthread_mutex_init(&p->mutex, &attr); |
| 292 | p->start = i * zone_size; |
| 293 | p->wp = p->start + zone_size; |
| 294 | p->type = BLK_ZONE_TYPE_SEQWRITE_REQ; |
| 295 | p->cond = BLK_ZONE_COND_EMPTY; |
| 296 | } |
| 297 | /* a sentinel */ |
| 298 | p->start = nr_zones * zone_size; |
| 299 | |
| 300 | f->zbd_info = zbd_info; |
| 301 | f->zbd_info->zone_size = zone_size; |
| 302 | f->zbd_info->zone_size_log2 = is_power_of_2(zone_size) ? |
| 303 | ilog2(zone_size) : -1; |
| 304 | f->zbd_info->nr_zones = nr_zones; |
| 305 | pthread_mutexattr_destroy(&attr); |
| 306 | return 0; |
| 307 | } |
| 308 | |
| 309 | /* |
| 310 | * Parse the BLKREPORTZONE output and store it in f->zbd_info. Must be called |
| 311 | * only for devices that support this ioctl, namely zoned block devices. |
| 312 | */ |
| 313 | static int parse_zone_info(struct thread_data *td, struct fio_file *f) |
| 314 | { |
| 315 | const unsigned int bufsz = sizeof(struct blk_zone_report) + |
| 316 | 4096 * sizeof(struct blk_zone); |
| 317 | uint32_t nr_zones; |
| 318 | struct blk_zone_report *hdr; |
| 319 | const struct blk_zone *z; |
| 320 | struct fio_zone_info *p; |
| 321 | uint64_t zone_size, start_sector; |
| 322 | struct zoned_block_device_info *zbd_info = NULL; |
| 323 | pthread_mutexattr_t attr; |
| 324 | void *buf; |
| 325 | int fd, i, j, ret = 0; |
| 326 | |
| 327 | pthread_mutexattr_init(&attr); |
| 328 | pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE); |
| 329 | pthread_mutexattr_setpshared(&attr, true); |
| 330 | |
| 331 | buf = malloc(bufsz); |
| 332 | if (!buf) |
| 333 | goto out; |
| 334 | |
| 335 | fd = open(f->file_name, O_RDONLY | O_LARGEFILE); |
| 336 | if (fd < 0) { |
| 337 | ret = -errno; |
| 338 | goto free; |
| 339 | } |
| 340 | |
| 341 | ret = read_zone_info(fd, 0, buf, bufsz); |
| 342 | if (ret < 0) { |
| 343 | log_info("fio: BLKREPORTZONE(%lu) failed for %s (%d).\n", |
| 344 | 0UL, f->file_name, -ret); |
| 345 | goto close; |
| 346 | } |
| 347 | hdr = buf; |
| 348 | if (hdr->nr_zones < 1) { |
| 349 | log_info("fio: %s has invalid zone information.\n", |
| 350 | f->file_name); |
| 351 | goto close; |
| 352 | } |
| 353 | z = (void *)(hdr + 1); |
| 354 | zone_size = z->len << 9; |
| 355 | nr_zones = (f->real_file_size + zone_size - 1) / zone_size; |
| 356 | |
| 357 | if (td->o.zone_size == 0) { |
| 358 | td->o.zone_size = zone_size; |
| 359 | } else if (td->o.zone_size != zone_size) { |
| 360 | log_info("fio: %s job parameter zonesize %lld does not match disk zone size %ld.\n", |
| 361 | f->file_name, td->o.zone_size, zone_size); |
| 362 | ret = -EINVAL; |
| 363 | goto close; |
| 364 | } |
| 365 | |
| 366 | dprint(FD_ZBD, "Device %s has %d zones of size %lu KB\n", f->file_name, |
| 367 | nr_zones, zone_size / 1024); |
| 368 | |
| 369 | zbd_info = scalloc(1, sizeof(*zbd_info) + |
| 370 | (nr_zones + 1) * sizeof(zbd_info->zone_info[0])); |
| 371 | ret = -ENOMEM; |
| 372 | if (!zbd_info) |
| 373 | goto close; |
| 374 | pthread_mutex_init(&zbd_info->mutex, &attr); |
| 375 | zbd_info->refcount = 1; |
| 376 | p = &zbd_info->zone_info[0]; |
| 377 | for (start_sector = 0, j = 0; j < nr_zones;) { |
| 378 | z = (void *)(hdr + 1); |
| 379 | for (i = 0; i < hdr->nr_zones; i++, j++, z++, p++) { |
| 380 | pthread_mutex_init(&p->mutex, &attr); |
| 381 | p->start = z->start << 9; |
| 382 | switch (z->cond) { |
| 383 | case BLK_ZONE_COND_NOT_WP: |
| 384 | p->wp = p->start; |
| 385 | break; |
| 386 | case BLK_ZONE_COND_FULL: |
| 387 | p->wp = p->start + zone_size; |
| 388 | break; |
| 389 | default: |
| 390 | assert(z->start <= z->wp); |
| 391 | assert(z->wp <= z->start + (zone_size >> 9)); |
| 392 | p->wp = z->wp << 9; |
| 393 | break; |
| 394 | } |
| 395 | p->type = z->type; |
| 396 | p->cond = z->cond; |
| 397 | if (j > 0 && p->start != p[-1].start + zone_size) { |
| 398 | log_info("%s: invalid zone data\n", |
| 399 | f->file_name); |
| 400 | ret = -EINVAL; |
| 401 | goto close; |
| 402 | } |
| 403 | } |
| 404 | z--; |
| 405 | start_sector = z->start + z->len; |
| 406 | if (j >= nr_zones) |
| 407 | break; |
| 408 | ret = read_zone_info(fd, start_sector, buf, bufsz); |
| 409 | if (ret < 0) { |
| 410 | log_info("fio: BLKREPORTZONE(%lu) failed for %s (%d).\n", |
| 411 | start_sector, f->file_name, -ret); |
| 412 | goto close; |
| 413 | } |
| 414 | } |
| 415 | /* a sentinel */ |
| 416 | zbd_info->zone_info[nr_zones].start = start_sector << 9; |
| 417 | |
| 418 | f->zbd_info = zbd_info; |
| 419 | f->zbd_info->zone_size = zone_size; |
| 420 | f->zbd_info->zone_size_log2 = is_power_of_2(zone_size) ? |
| 421 | ilog2(zone_size) : -1; |
| 422 | f->zbd_info->nr_zones = nr_zones; |
| 423 | zbd_info = NULL; |
| 424 | ret = 0; |
| 425 | |
| 426 | close: |
| 427 | sfree(zbd_info); |
| 428 | close(fd); |
| 429 | free: |
| 430 | free(buf); |
| 431 | out: |
| 432 | pthread_mutexattr_destroy(&attr); |
| 433 | return ret; |
| 434 | } |
| 435 | |
| 436 | /* |
| 437 | * Allocate zone information and store it into f->zbd_info if zonemode=zbd. |
| 438 | * |
| 439 | * Returns 0 upon success and a negative error code upon failure. |
| 440 | */ |
| 441 | int zbd_create_zone_info(struct thread_data *td, struct fio_file *f) |
| 442 | { |
| 443 | enum blk_zoned_model zbd_model; |
| 444 | int ret = 0; |
| 445 | |
| 446 | assert(td->o.zone_mode == ZONE_MODE_ZBD); |
| 447 | |
| 448 | zbd_model = get_zbd_model(f->file_name); |
| 449 | switch (zbd_model) { |
| 450 | case ZBD_DM_HOST_AWARE: |
| 451 | case ZBD_DM_HOST_MANAGED: |
| 452 | ret = parse_zone_info(td, f); |
| 453 | break; |
| 454 | case ZBD_DM_NONE: |
| 455 | ret = init_zone_info(td, f); |
| 456 | break; |
| 457 | } |
| 458 | if (ret == 0) |
| 459 | f->zbd_info->model = zbd_model; |
| 460 | return ret; |
| 461 | } |
| 462 | |
| 463 | void zbd_free_zone_info(struct fio_file *f) |
| 464 | { |
| 465 | uint32_t refcount; |
| 466 | |
| 467 | if (!f->zbd_info) |
| 468 | return; |
| 469 | |
| 470 | pthread_mutex_lock(&f->zbd_info->mutex); |
| 471 | refcount = --f->zbd_info->refcount; |
| 472 | pthread_mutex_unlock(&f->zbd_info->mutex); |
| 473 | |
| 474 | assert((int32_t)refcount >= 0); |
| 475 | if (refcount == 0) |
| 476 | sfree(f->zbd_info); |
| 477 | f->zbd_info = NULL; |
| 478 | } |
| 479 | |
| 480 | /* |
| 481 | * Initialize f->zbd_info. |
| 482 | * |
| 483 | * Returns 0 upon success and a negative error code upon failure. |
| 484 | * |
| 485 | * Note: this function can only work correctly if it is called before the first |
| 486 | * fio fork() call. |
| 487 | */ |
| 488 | static int zbd_init_zone_info(struct thread_data *td, struct fio_file *file) |
| 489 | { |
| 490 | struct thread_data *td2; |
| 491 | struct fio_file *f2; |
| 492 | int i, j, ret; |
| 493 | |
| 494 | for_each_td(td2, i) { |
| 495 | for_each_file(td2, f2, j) { |
| 496 | if (td2 == td && f2 == file) |
| 497 | continue; |
| 498 | if (!f2->zbd_info || |
| 499 | strcmp(f2->file_name, file->file_name) != 0) |
| 500 | continue; |
| 501 | file->zbd_info = f2->zbd_info; |
| 502 | file->zbd_info->refcount++; |
| 503 | return 0; |
| 504 | } |
| 505 | } |
| 506 | |
| 507 | ret = zbd_create_zone_info(td, file); |
| 508 | if (ret < 0) |
| 509 | td_verror(td, -ret, "BLKREPORTZONE failed"); |
| 510 | return ret; |
| 511 | } |
| 512 | |
| 513 | int zbd_init(struct thread_data *td) |
| 514 | { |
| 515 | struct fio_file *f; |
| 516 | int i; |
| 517 | |
| 518 | for_each_file(td, f, i) { |
| 519 | if (f->filetype != FIO_TYPE_BLOCK) |
| 520 | continue; |
| 521 | if (td->o.zone_size && td->o.zone_size < 512) { |
| 522 | log_err("%s: zone size must be at least 512 bytes for --zonemode=zbd\n\n", |
| 523 | f->file_name); |
| 524 | return 1; |
| 525 | } |
| 526 | if (td->o.zone_size == 0 && |
| 527 | get_zbd_model(f->file_name) == ZBD_DM_NONE) { |
| 528 | log_err("%s: Specifying the zone size is mandatory for regular block devices with --zonemode=zbd\n\n", |
| 529 | f->file_name); |
| 530 | return 1; |
| 531 | } |
| 532 | zbd_init_zone_info(td, f); |
| 533 | } |
| 534 | |
| 535 | if (!zbd_using_direct_io()) { |
| 536 | log_err("Using direct I/O is mandatory for writing to ZBD drives\n\n"); |
| 537 | return 1; |
| 538 | } |
| 539 | |
| 540 | if (!zbd_verify_sizes()) |
| 541 | return 1; |
| 542 | |
| 543 | if (!zbd_verify_bs()) |
| 544 | return 1; |
| 545 | |
| 546 | return 0; |
| 547 | } |
| 548 | |
| 549 | /** |
| 550 | * zbd_reset_range - reset zones for a range of sectors |
| 551 | * @td: FIO thread data. |
| 552 | * @f: Fio file for which to reset zones |
| 553 | * @sector: Starting sector in units of 512 bytes |
| 554 | * @nr_sectors: Number of sectors in units of 512 bytes |
| 555 | * |
| 556 | * Returns 0 upon success and a negative error code upon failure. |
| 557 | */ |
| 558 | static int zbd_reset_range(struct thread_data *td, const struct fio_file *f, |
| 559 | uint64_t offset, uint64_t length) |
| 560 | { |
| 561 | struct blk_zone_range zr = { |
| 562 | .sector = offset >> 9, |
| 563 | .nr_sectors = length >> 9, |
| 564 | }; |
| 565 | uint32_t zone_idx_b, zone_idx_e; |
| 566 | struct fio_zone_info *zb, *ze, *z; |
| 567 | int ret = 0; |
| 568 | |
| 569 | assert(f->fd != -1); |
| 570 | assert(is_valid_offset(f, offset + length - 1)); |
| 571 | switch (f->zbd_info->model) { |
| 572 | case ZBD_DM_HOST_AWARE: |
| 573 | case ZBD_DM_HOST_MANAGED: |
| 574 | ret = ioctl(f->fd, BLKRESETZONE, &zr); |
| 575 | if (ret < 0) { |
| 576 | td_verror(td, errno, "resetting wp failed"); |
| 577 | log_err("%s: resetting wp for %llu sectors at sector %llu failed (%d).\n", |
| 578 | f->file_name, zr.nr_sectors, zr.sector, errno); |
| 579 | return ret; |
| 580 | } |
| 581 | break; |
| 582 | case ZBD_DM_NONE: |
| 583 | break; |
| 584 | } |
| 585 | |
| 586 | zone_idx_b = zbd_zone_idx(f, offset); |
| 587 | zb = &f->zbd_info->zone_info[zone_idx_b]; |
| 588 | zone_idx_e = zbd_zone_idx(f, offset + length); |
| 589 | ze = &f->zbd_info->zone_info[zone_idx_e]; |
| 590 | for (z = zb; z < ze; z++) { |
| 591 | pthread_mutex_lock(&z->mutex); |
| 592 | pthread_mutex_lock(&f->zbd_info->mutex); |
| 593 | f->zbd_info->sectors_with_data -= z->wp - z->start; |
| 594 | pthread_mutex_unlock(&f->zbd_info->mutex); |
| 595 | z->wp = z->start; |
| 596 | z->verify_block = 0; |
| 597 | pthread_mutex_unlock(&z->mutex); |
| 598 | } |
| 599 | |
| 600 | td->ts.nr_zone_resets += ze - zb; |
| 601 | |
| 602 | return ret; |
| 603 | } |
| 604 | |
| 605 | /** |
| 606 | * zbd_reset_zone - reset the write pointer of a single zone |
| 607 | * @td: FIO thread data. |
| 608 | * @f: FIO file associated with the disk for which to reset a write pointer. |
| 609 | * @z: Zone to reset. |
| 610 | * |
| 611 | * Returns 0 upon success and a negative error code upon failure. |
| 612 | */ |
| 613 | static int zbd_reset_zone(struct thread_data *td, const struct fio_file *f, |
| 614 | struct fio_zone_info *z) |
| 615 | { |
| 616 | int ret; |
| 617 | |
| 618 | dprint(FD_ZBD, "%s: resetting wp of zone %lu.\n", f->file_name, |
| 619 | z - f->zbd_info->zone_info); |
| 620 | ret = zbd_reset_range(td, f, z->start, (z+1)->start - z->start); |
| 621 | return ret; |
| 622 | } |
| 623 | |
| 624 | /* |
| 625 | * Reset a range of zones. Returns 0 upon success and 1 upon failure. |
| 626 | * @td: fio thread data. |
| 627 | * @f: fio file for which to reset zones |
| 628 | * @zb: first zone to reset. |
| 629 | * @ze: first zone not to reset. |
| 630 | * @all_zones: whether to reset all zones or only those zones for which the |
| 631 | * write pointer is not a multiple of td->o.min_bs[DDIR_WRITE]. |
| 632 | */ |
| 633 | static int zbd_reset_zones(struct thread_data *td, struct fio_file *f, |
| 634 | struct fio_zone_info *const zb, |
| 635 | struct fio_zone_info *const ze, bool all_zones) |
| 636 | { |
| 637 | struct fio_zone_info *z, *start_z = ze; |
| 638 | const uint32_t min_bs = td->o.min_bs[DDIR_WRITE]; |
| 639 | bool reset_wp; |
| 640 | int res = 0; |
| 641 | |
| 642 | dprint(FD_ZBD, "%s: examining zones %lu .. %lu\n", f->file_name, |
| 643 | zb - f->zbd_info->zone_info, ze - f->zbd_info->zone_info); |
| 644 | assert(f->fd != -1); |
| 645 | for (z = zb; z < ze; z++) { |
| 646 | pthread_mutex_lock(&z->mutex); |
| 647 | switch (z->type) { |
| 648 | case BLK_ZONE_TYPE_SEQWRITE_REQ: |
| 649 | reset_wp = all_zones ? z->wp != z->start : |
| 650 | (td->o.td_ddir & TD_DDIR_WRITE) && |
| 651 | z->wp % min_bs != 0; |
| 652 | if (start_z == ze && reset_wp) { |
| 653 | start_z = z; |
| 654 | } else if (start_z < ze && !reset_wp) { |
| 655 | dprint(FD_ZBD, |
| 656 | "%s: resetting zones %lu .. %lu\n", |
| 657 | f->file_name, |
| 658 | start_z - f->zbd_info->zone_info, |
| 659 | z - f->zbd_info->zone_info); |
| 660 | if (zbd_reset_range(td, f, start_z->start, |
| 661 | z->start - start_z->start) < 0) |
| 662 | res = 1; |
| 663 | start_z = ze; |
| 664 | } |
| 665 | break; |
| 666 | default: |
| 667 | if (start_z == ze) |
| 668 | break; |
| 669 | dprint(FD_ZBD, "%s: resetting zones %lu .. %lu\n", |
| 670 | f->file_name, start_z - f->zbd_info->zone_info, |
| 671 | z - f->zbd_info->zone_info); |
| 672 | if (zbd_reset_range(td, f, start_z->start, |
| 673 | z->start - start_z->start) < 0) |
| 674 | res = 1; |
| 675 | start_z = ze; |
| 676 | break; |
| 677 | } |
| 678 | } |
| 679 | if (start_z < ze) { |
| 680 | dprint(FD_ZBD, "%s: resetting zones %lu .. %lu\n", f->file_name, |
| 681 | start_z - f->zbd_info->zone_info, |
| 682 | z - f->zbd_info->zone_info); |
| 683 | if (zbd_reset_range(td, f, start_z->start, |
| 684 | z->start - start_z->start) < 0) |
| 685 | res = 1; |
| 686 | } |
| 687 | for (z = zb; z < ze; z++) |
| 688 | pthread_mutex_unlock(&z->mutex); |
| 689 | |
| 690 | return res; |
| 691 | } |
| 692 | |
| 693 | /* |
| 694 | * Reset zbd_info.write_cnt, the counter that counts down towards the next |
| 695 | * zone reset. |
| 696 | */ |
| 697 | static void zbd_reset_write_cnt(const struct thread_data *td, |
| 698 | const struct fio_file *f) |
| 699 | { |
| 700 | assert(0 <= td->o.zrf.u.f && td->o.zrf.u.f <= 1); |
| 701 | |
| 702 | pthread_mutex_lock(&f->zbd_info->mutex); |
| 703 | f->zbd_info->write_cnt = td->o.zrf.u.f ? |
| 704 | min(1.0 / td->o.zrf.u.f, 0.0 + UINT_MAX) : UINT_MAX; |
| 705 | pthread_mutex_unlock(&f->zbd_info->mutex); |
| 706 | } |
| 707 | |
| 708 | static bool zbd_dec_and_reset_write_cnt(const struct thread_data *td, |
| 709 | const struct fio_file *f) |
| 710 | { |
| 711 | uint32_t write_cnt = 0; |
| 712 | |
| 713 | pthread_mutex_lock(&f->zbd_info->mutex); |
| 714 | assert(f->zbd_info->write_cnt); |
| 715 | if (f->zbd_info->write_cnt) |
| 716 | write_cnt = --f->zbd_info->write_cnt; |
| 717 | if (write_cnt == 0) |
| 718 | zbd_reset_write_cnt(td, f); |
| 719 | pthread_mutex_unlock(&f->zbd_info->mutex); |
| 720 | |
| 721 | return write_cnt == 0; |
| 722 | } |
| 723 | |
| 724 | /* Check whether the value of zbd_info.sectors_with_data is correct. */ |
| 725 | static void check_swd(const struct thread_data *td, const struct fio_file *f) |
| 726 | { |
| 727 | #if 0 |
| 728 | struct fio_zone_info *zb, *ze, *z; |
| 729 | uint64_t swd; |
| 730 | |
| 731 | zb = &f->zbd_info->zone_info[zbd_zone_idx(f, f->file_offset)]; |
| 732 | ze = &f->zbd_info->zone_info[zbd_zone_idx(f, f->file_offset + |
| 733 | f->io_size)]; |
| 734 | swd = 0; |
| 735 | for (z = zb; z < ze; z++) { |
| 736 | pthread_mutex_lock(&z->mutex); |
| 737 | swd += z->wp - z->start; |
| 738 | } |
| 739 | pthread_mutex_lock(&f->zbd_info->mutex); |
| 740 | assert(f->zbd_info->sectors_with_data == swd); |
| 741 | pthread_mutex_unlock(&f->zbd_info->mutex); |
| 742 | for (z = zb; z < ze; z++) |
| 743 | pthread_mutex_unlock(&z->mutex); |
| 744 | #endif |
| 745 | } |
| 746 | |
| 747 | void zbd_file_reset(struct thread_data *td, struct fio_file *f) |
| 748 | { |
| 749 | struct fio_zone_info *zb, *ze, *z; |
| 750 | uint32_t zone_idx_e; |
| 751 | uint64_t swd = 0; |
| 752 | |
| 753 | if (!f->zbd_info) |
| 754 | return; |
| 755 | |
| 756 | zb = &f->zbd_info->zone_info[zbd_zone_idx(f, f->file_offset)]; |
| 757 | zone_idx_e = zbd_zone_idx(f, f->file_offset + f->io_size); |
| 758 | ze = &f->zbd_info->zone_info[zone_idx_e]; |
| 759 | for (z = zb ; z < ze; z++) { |
| 760 | pthread_mutex_lock(&z->mutex); |
| 761 | swd += z->wp - z->start; |
| 762 | } |
| 763 | pthread_mutex_lock(&f->zbd_info->mutex); |
| 764 | f->zbd_info->sectors_with_data = swd; |
| 765 | pthread_mutex_unlock(&f->zbd_info->mutex); |
| 766 | for (z = zb ; z < ze; z++) |
| 767 | pthread_mutex_unlock(&z->mutex); |
| 768 | dprint(FD_ZBD, "%s(%s): swd = %ld\n", __func__, f->file_name, swd); |
| 769 | /* |
| 770 | * If data verification is enabled reset the affected zones before |
| 771 | * writing any data to avoid that a zone reset has to be issued while |
| 772 | * writing data, which causes data loss. |
| 773 | */ |
| 774 | zbd_reset_zones(td, f, zb, ze, td->o.verify != VERIFY_NONE && |
| 775 | (td->o.td_ddir & TD_DDIR_WRITE) && |
| 776 | td->runstate != TD_VERIFYING); |
| 777 | zbd_reset_write_cnt(td, f); |
| 778 | } |
| 779 | |
| 780 | /* The caller must hold f->zbd_info->mutex. */ |
| 781 | static bool is_zone_open(const struct thread_data *td, const struct fio_file *f, |
| 782 | unsigned int zone_idx) |
| 783 | { |
| 784 | struct zoned_block_device_info *zbdi = f->zbd_info; |
| 785 | int i; |
| 786 | |
| 787 | assert(td->o.max_open_zones <= ARRAY_SIZE(zbdi->open_zones)); |
| 788 | assert(zbdi->num_open_zones <= td->o.max_open_zones); |
| 789 | |
| 790 | for (i = 0; i < zbdi->num_open_zones; i++) |
| 791 | if (zbdi->open_zones[i] == zone_idx) |
| 792 | return true; |
| 793 | |
| 794 | return false; |
| 795 | } |
| 796 | |
| 797 | /* |
| 798 | * Open a ZBD zone if it was not yet open. Returns true if either the zone was |
| 799 | * already open or if opening a new zone is allowed. Returns false if the zone |
| 800 | * was not yet open and opening a new zone would cause the zone limit to be |
| 801 | * exceeded. |
| 802 | */ |
| 803 | static bool zbd_open_zone(struct thread_data *td, const struct io_u *io_u, |
| 804 | uint32_t zone_idx) |
| 805 | { |
| 806 | const uint32_t min_bs = td->o.min_bs[DDIR_WRITE]; |
| 807 | const struct fio_file *f = io_u->file; |
| 808 | struct fio_zone_info *z = &f->zbd_info->zone_info[zone_idx]; |
| 809 | bool res = true; |
| 810 | |
| 811 | if (z->cond == BLK_ZONE_COND_OFFLINE) |
| 812 | return false; |
| 813 | |
| 814 | /* |
| 815 | * Skip full zones with data verification enabled because resetting a |
| 816 | * zone causes data loss and hence causes verification to fail. |
| 817 | */ |
| 818 | if (td->o.verify != VERIFY_NONE && zbd_zone_full(f, z, min_bs)) |
| 819 | return false; |
| 820 | |
| 821 | /* Zero means no limit */ |
| 822 | if (!td->o.max_open_zones) |
| 823 | return true; |
| 824 | |
| 825 | pthread_mutex_lock(&f->zbd_info->mutex); |
| 826 | if (is_zone_open(td, f, zone_idx)) |
| 827 | goto out; |
| 828 | res = false; |
| 829 | if (f->zbd_info->num_open_zones >= td->o.max_open_zones) |
| 830 | goto out; |
| 831 | dprint(FD_ZBD, "%s: opening zone %d\n", f->file_name, zone_idx); |
| 832 | f->zbd_info->open_zones[f->zbd_info->num_open_zones++] = zone_idx; |
| 833 | z->open = 1; |
| 834 | res = true; |
| 835 | |
| 836 | out: |
| 837 | pthread_mutex_unlock(&f->zbd_info->mutex); |
| 838 | return res; |
| 839 | } |
| 840 | |
| 841 | /* The caller must hold f->zbd_info->mutex */ |
| 842 | static void zbd_close_zone(struct thread_data *td, const struct fio_file *f, |
| 843 | unsigned int open_zone_idx) |
| 844 | { |
| 845 | uint32_t zone_idx; |
| 846 | |
| 847 | assert(open_zone_idx < f->zbd_info->num_open_zones); |
| 848 | zone_idx = f->zbd_info->open_zones[open_zone_idx]; |
| 849 | memmove(f->zbd_info->open_zones + open_zone_idx, |
| 850 | f->zbd_info->open_zones + open_zone_idx + 1, |
| 851 | (FIO_MAX_OPEN_ZBD_ZONES - (open_zone_idx + 1)) * |
| 852 | sizeof(f->zbd_info->open_zones[0])); |
| 853 | f->zbd_info->num_open_zones--; |
| 854 | f->zbd_info->zone_info[zone_idx].open = 0; |
| 855 | } |
| 856 | |
| 857 | /* |
| 858 | * Modify the offset of an I/O unit that does not refer to an open zone such |
| 859 | * that it refers to an open zone. Close an open zone and open a new zone if |
| 860 | * necessary. This algorithm can only work correctly if all write pointers are |
| 861 | * a multiple of the fio block size. The caller must neither hold z->mutex |
| 862 | * nor f->zbd_info->mutex. Returns with z->mutex held upon success. |
| 863 | */ |
| 864 | struct fio_zone_info *zbd_convert_to_open_zone(struct thread_data *td, |
| 865 | struct io_u *io_u) |
| 866 | { |
| 867 | const uint32_t min_bs = td->o.min_bs[io_u->ddir]; |
| 868 | const struct fio_file *f = io_u->file; |
| 869 | struct fio_zone_info *z; |
| 870 | unsigned int open_zone_idx = -1; |
| 871 | uint32_t zone_idx, new_zone_idx; |
| 872 | int i; |
| 873 | |
| 874 | assert(is_valid_offset(f, io_u->offset)); |
| 875 | |
| 876 | if (td->o.max_open_zones) { |
| 877 | /* |
| 878 | * This statement accesses f->zbd_info->open_zones[] on purpose |
| 879 | * without locking. |
| 880 | */ |
| 881 | zone_idx = f->zbd_info->open_zones[(io_u->offset - |
| 882 | f->file_offset) * |
| 883 | f->zbd_info->num_open_zones / f->io_size]; |
| 884 | } else { |
| 885 | zone_idx = zbd_zone_idx(f, io_u->offset); |
| 886 | } |
| 887 | dprint(FD_ZBD, "%s(%s): starting from zone %d (offset %lld, buflen %lld)\n", |
| 888 | __func__, f->file_name, zone_idx, io_u->offset, io_u->buflen); |
| 889 | |
| 890 | /* |
| 891 | * Since z->mutex is the outer lock and f->zbd_info->mutex the inner |
| 892 | * lock it can happen that the state of the zone with index zone_idx |
| 893 | * has changed after 'z' has been assigned and before f->zbd_info->mutex |
| 894 | * has been obtained. Hence the loop. |
| 895 | */ |
| 896 | for (;;) { |
| 897 | z = &f->zbd_info->zone_info[zone_idx]; |
| 898 | |
| 899 | pthread_mutex_lock(&z->mutex); |
| 900 | pthread_mutex_lock(&f->zbd_info->mutex); |
| 901 | if (td->o.max_open_zones == 0) |
| 902 | goto examine_zone; |
| 903 | if (f->zbd_info->num_open_zones == 0) { |
| 904 | pthread_mutex_unlock(&f->zbd_info->mutex); |
| 905 | pthread_mutex_unlock(&z->mutex); |
| 906 | dprint(FD_ZBD, "%s(%s): no zones are open\n", |
| 907 | __func__, f->file_name); |
| 908 | return NULL; |
| 909 | } |
| 910 | open_zone_idx = (io_u->offset - f->file_offset) * |
| 911 | f->zbd_info->num_open_zones / f->io_size; |
| 912 | assert(open_zone_idx < f->zbd_info->num_open_zones); |
| 913 | new_zone_idx = f->zbd_info->open_zones[open_zone_idx]; |
| 914 | if (new_zone_idx == zone_idx) |
| 915 | break; |
| 916 | zone_idx = new_zone_idx; |
| 917 | pthread_mutex_unlock(&f->zbd_info->mutex); |
| 918 | pthread_mutex_unlock(&z->mutex); |
| 919 | } |
| 920 | |
| 921 | /* Both z->mutex and f->zbd_info->mutex are held. */ |
| 922 | |
| 923 | examine_zone: |
| 924 | if (z->wp + min_bs <= (z+1)->start) { |
| 925 | pthread_mutex_unlock(&f->zbd_info->mutex); |
| 926 | goto out; |
| 927 | } |
| 928 | dprint(FD_ZBD, "%s(%s): closing zone %d\n", __func__, f->file_name, |
| 929 | zone_idx); |
| 930 | if (td->o.max_open_zones) |
| 931 | zbd_close_zone(td, f, open_zone_idx); |
| 932 | pthread_mutex_unlock(&f->zbd_info->mutex); |
| 933 | |
| 934 | /* Only z->mutex is held. */ |
| 935 | |
| 936 | /* Zone 'z' is full, so try to open a new zone. */ |
| 937 | for (i = f->io_size / f->zbd_info->zone_size; i > 0; i--) { |
| 938 | zone_idx++; |
| 939 | pthread_mutex_unlock(&z->mutex); |
| 940 | z++; |
| 941 | if (!is_valid_offset(f, z->start)) { |
| 942 | /* Wrap-around. */ |
| 943 | zone_idx = zbd_zone_idx(f, f->file_offset); |
| 944 | z = &f->zbd_info->zone_info[zone_idx]; |
| 945 | } |
| 946 | assert(is_valid_offset(f, z->start)); |
| 947 | pthread_mutex_lock(&z->mutex); |
| 948 | if (z->open) |
| 949 | continue; |
| 950 | if (zbd_open_zone(td, io_u, zone_idx)) |
| 951 | goto out; |
| 952 | } |
| 953 | |
| 954 | /* Only z->mutex is held. */ |
| 955 | |
| 956 | /* Check whether the write fits in any of the already opened zones. */ |
| 957 | pthread_mutex_lock(&f->zbd_info->mutex); |
| 958 | for (i = 0; i < f->zbd_info->num_open_zones; i++) { |
| 959 | zone_idx = f->zbd_info->open_zones[i]; |
| 960 | pthread_mutex_unlock(&f->zbd_info->mutex); |
| 961 | pthread_mutex_unlock(&z->mutex); |
| 962 | |
| 963 | z = &f->zbd_info->zone_info[zone_idx]; |
| 964 | |
| 965 | pthread_mutex_lock(&z->mutex); |
| 966 | if (z->wp + min_bs <= (z+1)->start) |
| 967 | goto out; |
| 968 | pthread_mutex_lock(&f->zbd_info->mutex); |
| 969 | } |
| 970 | pthread_mutex_unlock(&f->zbd_info->mutex); |
| 971 | pthread_mutex_unlock(&z->mutex); |
| 972 | dprint(FD_ZBD, "%s(%s): did not open another zone\n", __func__, |
| 973 | f->file_name); |
| 974 | return NULL; |
| 975 | |
| 976 | out: |
| 977 | dprint(FD_ZBD, "%s(%s): returning zone %d\n", __func__, f->file_name, |
| 978 | zone_idx); |
| 979 | io_u->offset = z->start; |
| 980 | return z; |
| 981 | } |
| 982 | |
| 983 | /* The caller must hold z->mutex. */ |
| 984 | static struct fio_zone_info *zbd_replay_write_order(struct thread_data *td, |
| 985 | struct io_u *io_u, |
| 986 | struct fio_zone_info *z) |
| 987 | { |
| 988 | const struct fio_file *f = io_u->file; |
| 989 | const uint32_t min_bs = td->o.min_bs[DDIR_WRITE]; |
| 990 | |
| 991 | if (!zbd_open_zone(td, io_u, z - f->zbd_info->zone_info)) { |
| 992 | pthread_mutex_unlock(&z->mutex); |
| 993 | z = zbd_convert_to_open_zone(td, io_u); |
| 994 | assert(z); |
| 995 | } |
| 996 | |
| 997 | if (z->verify_block * min_bs >= f->zbd_info->zone_size) |
| 998 | log_err("%s: %d * %d >= %ld\n", f->file_name, z->verify_block, |
| 999 | min_bs, f->zbd_info->zone_size); |
| 1000 | io_u->offset = z->start + z->verify_block++ * min_bs; |
| 1001 | return z; |
| 1002 | } |
| 1003 | |
| 1004 | /* |
| 1005 | * Find another zone for which @io_u fits below the write pointer. Start |
| 1006 | * searching in zones @zb + 1 .. @zl and continue searching in zones |
| 1007 | * @zf .. @zb - 1. |
| 1008 | * |
| 1009 | * Either returns NULL or returns a zone pointer and holds the mutex for that |
| 1010 | * zone. |
| 1011 | */ |
| 1012 | static struct fio_zone_info * |
| 1013 | zbd_find_zone(struct thread_data *td, struct io_u *io_u, |
| 1014 | struct fio_zone_info *zb, struct fio_zone_info *zl) |
| 1015 | { |
| 1016 | const uint32_t min_bs = td->o.min_bs[io_u->ddir]; |
| 1017 | const struct fio_file *f = io_u->file; |
| 1018 | struct fio_zone_info *z1, *z2; |
| 1019 | const struct fio_zone_info *const zf = |
| 1020 | &f->zbd_info->zone_info[zbd_zone_idx(f, f->file_offset)]; |
| 1021 | |
| 1022 | /* |
| 1023 | * Skip to the next non-empty zone in case of sequential I/O and to |
| 1024 | * the nearest non-empty zone in case of random I/O. |
| 1025 | */ |
| 1026 | for (z1 = zb + 1, z2 = zb - 1; z1 < zl || z2 >= zf; z1++, z2--) { |
| 1027 | if (z1 < zl && z1->cond != BLK_ZONE_COND_OFFLINE) { |
| 1028 | pthread_mutex_lock(&z1->mutex); |
| 1029 | if (z1->start + min_bs <= z1->wp) |
| 1030 | return z1; |
| 1031 | pthread_mutex_unlock(&z1->mutex); |
| 1032 | } else if (!td_random(td)) { |
| 1033 | break; |
| 1034 | } |
| 1035 | if (td_random(td) && z2 >= zf && |
| 1036 | z2->cond != BLK_ZONE_COND_OFFLINE) { |
| 1037 | pthread_mutex_lock(&z2->mutex); |
| 1038 | if (z2->start + min_bs <= z2->wp) |
| 1039 | return z2; |
| 1040 | pthread_mutex_unlock(&z2->mutex); |
| 1041 | } |
| 1042 | } |
| 1043 | dprint(FD_ZBD, "%s: adjusting random read offset failed\n", |
| 1044 | f->file_name); |
| 1045 | return NULL; |
| 1046 | } |
| 1047 | |
| 1048 | |
| 1049 | /** |
| 1050 | * zbd_post_submit - update the write pointer and unlock the zone lock |
| 1051 | * @io_u: I/O unit |
| 1052 | * @success: Whether or not the I/O unit has been executed successfully |
| 1053 | * |
| 1054 | * For write and trim operations, update the write pointer of all affected |
| 1055 | * zones. |
| 1056 | */ |
| 1057 | static void zbd_post_submit(const struct io_u *io_u, bool success) |
| 1058 | { |
| 1059 | struct zoned_block_device_info *zbd_info; |
| 1060 | struct fio_zone_info *z; |
| 1061 | uint32_t zone_idx; |
| 1062 | uint64_t end, zone_end; |
| 1063 | |
| 1064 | zbd_info = io_u->file->zbd_info; |
| 1065 | if (!zbd_info) |
| 1066 | return; |
| 1067 | |
| 1068 | zone_idx = zbd_zone_idx(io_u->file, io_u->offset); |
| 1069 | end = io_u->offset + io_u->buflen; |
| 1070 | z = &zbd_info->zone_info[zone_idx]; |
| 1071 | assert(zone_idx < zbd_info->nr_zones); |
| 1072 | if (z->type != BLK_ZONE_TYPE_SEQWRITE_REQ) |
| 1073 | return; |
| 1074 | if (!success) |
| 1075 | goto unlock; |
| 1076 | switch (io_u->ddir) { |
| 1077 | case DDIR_WRITE: |
| 1078 | zone_end = min(end, (z + 1)->start); |
| 1079 | pthread_mutex_lock(&zbd_info->mutex); |
| 1080 | /* |
| 1081 | * z->wp > zone_end means that one or more I/O errors |
| 1082 | * have occurred. |
| 1083 | */ |
| 1084 | if (z->wp <= zone_end) |
| 1085 | zbd_info->sectors_with_data += zone_end - z->wp; |
| 1086 | pthread_mutex_unlock(&zbd_info->mutex); |
| 1087 | z->wp = zone_end; |
| 1088 | break; |
| 1089 | case DDIR_TRIM: |
| 1090 | assert(z->wp == z->start); |
| 1091 | break; |
| 1092 | default: |
| 1093 | break; |
| 1094 | } |
| 1095 | unlock: |
| 1096 | pthread_mutex_unlock(&z->mutex); |
| 1097 | } |
| 1098 | |
| 1099 | bool zbd_unaligned_write(int error_code) |
| 1100 | { |
| 1101 | switch (error_code) { |
| 1102 | case EIO: |
| 1103 | case EREMOTEIO: |
| 1104 | return true; |
| 1105 | } |
| 1106 | return false; |
| 1107 | } |
| 1108 | |
| 1109 | /** |
| 1110 | * zbd_adjust_block - adjust the offset and length as necessary for ZBD drives |
| 1111 | * @td: FIO thread data. |
| 1112 | * @io_u: FIO I/O unit. |
| 1113 | * |
| 1114 | * Locking strategy: returns with z->mutex locked if and only if z refers |
| 1115 | * to a sequential zone and if io_u_accept is returned. z is the zone that |
| 1116 | * corresponds to io_u->offset at the end of this function. |
| 1117 | */ |
| 1118 | enum io_u_action zbd_adjust_block(struct thread_data *td, struct io_u *io_u) |
| 1119 | { |
| 1120 | const struct fio_file *f = io_u->file; |
| 1121 | uint32_t zone_idx_b; |
| 1122 | struct fio_zone_info *zb, *zl, *orig_zb; |
| 1123 | uint32_t orig_len = io_u->buflen; |
| 1124 | uint32_t min_bs = td->o.min_bs[io_u->ddir]; |
| 1125 | uint64_t new_len; |
| 1126 | int64_t range; |
| 1127 | |
| 1128 | if (!f->zbd_info) |
| 1129 | return io_u_accept; |
| 1130 | |
| 1131 | assert(is_valid_offset(f, io_u->offset)); |
| 1132 | assert(io_u->buflen); |
| 1133 | zone_idx_b = zbd_zone_idx(f, io_u->offset); |
| 1134 | zb = &f->zbd_info->zone_info[zone_idx_b]; |
| 1135 | orig_zb = zb; |
| 1136 | |
| 1137 | /* Accept the I/O offset for conventional zones. */ |
| 1138 | if (zb->type == BLK_ZONE_TYPE_CONVENTIONAL) |
| 1139 | return io_u_accept; |
| 1140 | |
| 1141 | /* |
| 1142 | * Accept the I/O offset for reads if reading beyond the write pointer |
| 1143 | * is enabled. |
| 1144 | */ |
| 1145 | if (zb->cond != BLK_ZONE_COND_OFFLINE && |
| 1146 | io_u->ddir == DDIR_READ && td->o.read_beyond_wp) |
| 1147 | return io_u_accept; |
| 1148 | |
| 1149 | pthread_mutex_lock(&zb->mutex); |
| 1150 | switch (io_u->ddir) { |
| 1151 | case DDIR_READ: |
| 1152 | if (td->runstate == TD_VERIFYING) { |
| 1153 | zb = zbd_replay_write_order(td, io_u, zb); |
| 1154 | goto accept; |
| 1155 | } |
| 1156 | /* |
| 1157 | * Check that there is enough written data in the zone to do an |
| 1158 | * I/O of at least min_bs B. If there isn't, find a new zone for |
| 1159 | * the I/O. |
| 1160 | */ |
| 1161 | range = zb->cond != BLK_ZONE_COND_OFFLINE ? |
| 1162 | zb->wp - zb->start : 0; |
| 1163 | if (range < min_bs || |
| 1164 | ((!td_random(td)) && (io_u->offset + min_bs > zb->wp))) { |
| 1165 | pthread_mutex_unlock(&zb->mutex); |
| 1166 | zl = &f->zbd_info->zone_info[zbd_zone_idx(f, |
| 1167 | f->file_offset + f->io_size)]; |
| 1168 | zb = zbd_find_zone(td, io_u, zb, zl); |
| 1169 | if (!zb) { |
| 1170 | dprint(FD_ZBD, |
| 1171 | "%s: zbd_find_zone(%lld, %llu) failed\n", |
| 1172 | f->file_name, io_u->offset, |
| 1173 | io_u->buflen); |
| 1174 | goto eof; |
| 1175 | } |
| 1176 | /* |
| 1177 | * zbd_find_zone() returned a zone with a range of at |
| 1178 | * least min_bs. |
| 1179 | */ |
| 1180 | range = zb->wp - zb->start; |
| 1181 | assert(range >= min_bs); |
| 1182 | |
| 1183 | if (!td_random(td)) |
| 1184 | io_u->offset = zb->start; |
| 1185 | } |
| 1186 | /* |
| 1187 | * Make sure the I/O is within the zone valid data range while |
| 1188 | * maximizing the I/O size and preserving randomness. |
| 1189 | */ |
| 1190 | if (range <= io_u->buflen) |
| 1191 | io_u->offset = zb->start; |
| 1192 | else if (td_random(td)) |
| 1193 | io_u->offset = zb->start + |
| 1194 | ((io_u->offset - orig_zb->start) % |
| 1195 | (range - io_u->buflen)) / min_bs * min_bs; |
| 1196 | /* |
| 1197 | * Make sure the I/O does not cross over the zone wp position. |
| 1198 | */ |
| 1199 | new_len = min((unsigned long long)io_u->buflen, |
| 1200 | (unsigned long long)(zb->wp - io_u->offset)); |
| 1201 | new_len = new_len / min_bs * min_bs; |
| 1202 | if (new_len < io_u->buflen) { |
| 1203 | io_u->buflen = new_len; |
| 1204 | dprint(FD_IO, "Changed length from %u into %llu\n", |
| 1205 | orig_len, io_u->buflen); |
| 1206 | } |
| 1207 | assert(zb->start <= io_u->offset); |
| 1208 | assert(io_u->offset + io_u->buflen <= zb->wp); |
| 1209 | goto accept; |
| 1210 | case DDIR_WRITE: |
| 1211 | if (io_u->buflen > f->zbd_info->zone_size) |
| 1212 | goto eof; |
| 1213 | if (!zbd_open_zone(td, io_u, zone_idx_b)) { |
| 1214 | pthread_mutex_unlock(&zb->mutex); |
| 1215 | zb = zbd_convert_to_open_zone(td, io_u); |
| 1216 | if (!zb) |
| 1217 | goto eof; |
| 1218 | zone_idx_b = zb - f->zbd_info->zone_info; |
| 1219 | } |
| 1220 | /* Check whether the zone reset threshold has been exceeded */ |
| 1221 | if (td->o.zrf.u.f) { |
| 1222 | check_swd(td, f); |
| 1223 | if (f->zbd_info->sectors_with_data >= |
| 1224 | f->io_size * td->o.zrt.u.f && |
| 1225 | zbd_dec_and_reset_write_cnt(td, f)) { |
| 1226 | zb->reset_zone = 1; |
| 1227 | } |
| 1228 | } |
| 1229 | /* Reset the zone pointer if necessary */ |
| 1230 | if (zb->reset_zone || zbd_zone_full(f, zb, min_bs)) { |
| 1231 | assert(td->o.verify == VERIFY_NONE); |
| 1232 | /* |
| 1233 | * Since previous write requests may have been submitted |
| 1234 | * asynchronously and since we will submit the zone |
| 1235 | * reset synchronously, wait until previously submitted |
| 1236 | * write requests have completed before issuing a |
| 1237 | * zone reset. |
| 1238 | */ |
| 1239 | io_u_quiesce(td); |
| 1240 | zb->reset_zone = 0; |
| 1241 | if (zbd_reset_zone(td, f, zb) < 0) |
| 1242 | goto eof; |
| 1243 | check_swd(td, f); |
| 1244 | } |
| 1245 | /* Make writes occur at the write pointer */ |
| 1246 | assert(!zbd_zone_full(f, zb, min_bs)); |
| 1247 | io_u->offset = zb->wp; |
| 1248 | if (!is_valid_offset(f, io_u->offset)) { |
| 1249 | dprint(FD_ZBD, "Dropped request with offset %llu\n", |
| 1250 | io_u->offset); |
| 1251 | goto eof; |
| 1252 | } |
| 1253 | /* |
| 1254 | * Make sure that the buflen is a multiple of the minimal |
| 1255 | * block size. Give up if shrinking would make the request too |
| 1256 | * small. |
| 1257 | */ |
| 1258 | new_len = min((unsigned long long)io_u->buflen, |
| 1259 | (zb + 1)->start - io_u->offset); |
| 1260 | new_len = new_len / min_bs * min_bs; |
| 1261 | if (new_len == io_u->buflen) |
| 1262 | goto accept; |
| 1263 | if (new_len >= min_bs) { |
| 1264 | io_u->buflen = new_len; |
| 1265 | dprint(FD_IO, "Changed length from %u into %llu\n", |
| 1266 | orig_len, io_u->buflen); |
| 1267 | goto accept; |
| 1268 | } |
| 1269 | log_err("Zone remainder %lld smaller than minimum block size %d\n", |
| 1270 | ((zb + 1)->start - io_u->offset), |
| 1271 | min_bs); |
| 1272 | goto eof; |
| 1273 | case DDIR_TRIM: |
| 1274 | /* fall-through */ |
| 1275 | case DDIR_SYNC: |
| 1276 | case DDIR_DATASYNC: |
| 1277 | case DDIR_SYNC_FILE_RANGE: |
| 1278 | case DDIR_WAIT: |
| 1279 | case DDIR_LAST: |
| 1280 | case DDIR_INVAL: |
| 1281 | goto accept; |
| 1282 | } |
| 1283 | |
| 1284 | assert(false); |
| 1285 | |
| 1286 | accept: |
| 1287 | assert(zb); |
| 1288 | assert(zb->cond != BLK_ZONE_COND_OFFLINE); |
| 1289 | assert(!io_u->post_submit); |
| 1290 | io_u->post_submit = zbd_post_submit; |
| 1291 | return io_u_accept; |
| 1292 | |
| 1293 | eof: |
| 1294 | if (zb) |
| 1295 | pthread_mutex_unlock(&zb->mutex); |
| 1296 | return io_u_eof; |
| 1297 | } |
| 1298 | |
| 1299 | /* Return a string with ZBD statistics */ |
| 1300 | char *zbd_write_status(const struct thread_stat *ts) |
| 1301 | { |
| 1302 | char *res; |
| 1303 | |
| 1304 | if (asprintf(&res, "; %ld zone resets", ts->nr_zone_resets) < 0) |
| 1305 | return NULL; |
| 1306 | return res; |
| 1307 | } |