| 1 | #include <unistd.h> |
| 2 | #include <fcntl.h> |
| 3 | #include <string.h> |
| 4 | #include <assert.h> |
| 5 | #include <sys/stat.h> |
| 6 | #include <sys/mman.h> |
| 7 | |
| 8 | #include "fio.h" |
| 9 | #include "os.h" |
| 10 | |
| 11 | int open_file(struct thread_data *td, struct fio_file *f, int flags, int perm) |
| 12 | { |
| 13 | if (flags & O_CREAT) |
| 14 | f->fd = open(f->file_name, flags, perm); |
| 15 | else |
| 16 | f->fd = open(f->file_name, flags); |
| 17 | |
| 18 | if (f->fd != -1) { |
| 19 | td->nr_open_files++; |
| 20 | return 0; |
| 21 | } |
| 22 | |
| 23 | return 1; |
| 24 | } |
| 25 | |
| 26 | void close_file(struct thread_data *td, struct fio_file *f) |
| 27 | { |
| 28 | if (f->fd != -1) { |
| 29 | close(f->fd); |
| 30 | f->fd = -1; |
| 31 | td->nr_open_files--; |
| 32 | } |
| 33 | } |
| 34 | |
| 35 | /* |
| 36 | * Check if the file exists and it's large enough. |
| 37 | */ |
| 38 | static int file_ok(struct thread_data *td, struct fio_file *f) |
| 39 | { |
| 40 | struct stat st; |
| 41 | |
| 42 | if (td->filetype != FIO_TYPE_FILE || (td->io_ops->flags & FIO_NULLIO)) |
| 43 | return 0; |
| 44 | |
| 45 | if (lstat(f->file_name, &st) == -1) |
| 46 | return 1; |
| 47 | |
| 48 | /* |
| 49 | * if it's a special file, size is always ok for now |
| 50 | */ |
| 51 | if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) |
| 52 | return 0; |
| 53 | if (st.st_size < (off_t) f->file_size) |
| 54 | return 1; |
| 55 | |
| 56 | return 0; |
| 57 | } |
| 58 | |
| 59 | static int create_file(struct thread_data *td, struct fio_file *f) |
| 60 | { |
| 61 | unsigned long long left; |
| 62 | unsigned int bs; |
| 63 | char *b; |
| 64 | int r; |
| 65 | |
| 66 | f->fd = open(f->file_name, O_WRONLY | O_CREAT | O_TRUNC, 0644); |
| 67 | if (f->fd < 0) { |
| 68 | td_verror(td, errno, "open"); |
| 69 | return 1; |
| 70 | } |
| 71 | |
| 72 | if (ftruncate(f->fd, f->file_size) == -1) { |
| 73 | td_verror(td, errno, "ftruncate"); |
| 74 | goto err; |
| 75 | } |
| 76 | |
| 77 | if (posix_fallocate(f->fd, 0, f->file_size) < 0) { |
| 78 | td_verror(td, errno, "posix_fallocate"); |
| 79 | goto err; |
| 80 | } |
| 81 | |
| 82 | b = malloc(td->max_bs[DDIR_WRITE]); |
| 83 | memset(b, 0, td->max_bs[DDIR_WRITE]); |
| 84 | |
| 85 | left = f->file_size; |
| 86 | while (left && !td->terminate) { |
| 87 | bs = td->max_bs[DDIR_WRITE]; |
| 88 | if (bs > left) |
| 89 | bs = left; |
| 90 | |
| 91 | r = write(f->fd, b, bs); |
| 92 | |
| 93 | if (r == (int) bs) { |
| 94 | left -= bs; |
| 95 | continue; |
| 96 | } else { |
| 97 | if (r < 0) |
| 98 | td_verror(td, errno, "write"); |
| 99 | else |
| 100 | td_verror(td, EIO, "write"); |
| 101 | |
| 102 | break; |
| 103 | } |
| 104 | } |
| 105 | |
| 106 | if (td->terminate) |
| 107 | unlink(f->file_name); |
| 108 | else if (td->create_fsync) |
| 109 | fsync(f->fd); |
| 110 | |
| 111 | free(b); |
| 112 | close(f->fd); |
| 113 | f->fd = -1; |
| 114 | return 0; |
| 115 | err: |
| 116 | close(f->fd); |
| 117 | f->fd = -1; |
| 118 | return 1; |
| 119 | } |
| 120 | |
| 121 | static int create_files(struct thread_data *td) |
| 122 | { |
| 123 | struct fio_file *f; |
| 124 | int i, err, need_create; |
| 125 | |
| 126 | for_each_file(td, f, i) |
| 127 | f->file_size = td->total_file_size / td->nr_files; |
| 128 | |
| 129 | /* |
| 130 | * unless specifically asked for overwrite, let normal io extend it |
| 131 | */ |
| 132 | if (!td->overwrite) |
| 133 | return 0; |
| 134 | |
| 135 | need_create = 0; |
| 136 | if (td->filetype == FIO_TYPE_FILE) { |
| 137 | for_each_file(td, f, i) { |
| 138 | int file_there = !file_ok(td, f); |
| 139 | |
| 140 | if (file_there && td_write(td) && !td->overwrite) { |
| 141 | unlink(f->file_name); |
| 142 | file_there = 0; |
| 143 | } |
| 144 | |
| 145 | need_create += !file_there; |
| 146 | } |
| 147 | } |
| 148 | |
| 149 | if (!need_create) |
| 150 | return 0; |
| 151 | |
| 152 | if (!td->total_file_size) { |
| 153 | log_err("Need size for create\n"); |
| 154 | td_verror(td, EINVAL, "file_size"); |
| 155 | return 1; |
| 156 | } |
| 157 | |
| 158 | temp_stall_ts = 1; |
| 159 | fprintf(f_out, "%s: Laying out IO file(s) (%u x %LuMiB == %LuMiB)\n", |
| 160 | td->name, td->nr_uniq_files, |
| 161 | (td->total_file_size >> 20) / td->nr_uniq_files, |
| 162 | td->total_file_size >> 20); |
| 163 | |
| 164 | err = 0; |
| 165 | for_each_file(td, f, i) { |
| 166 | /* |
| 167 | * Only unlink files that we created. |
| 168 | */ |
| 169 | f->unlink = 0; |
| 170 | if (file_ok(td, f)) { |
| 171 | f->unlink = td->unlink; |
| 172 | err = create_file(td, f); |
| 173 | if (err) |
| 174 | break; |
| 175 | } |
| 176 | } |
| 177 | |
| 178 | temp_stall_ts = 0; |
| 179 | return err; |
| 180 | } |
| 181 | |
| 182 | static int file_size(struct thread_data *td, struct fio_file *f) |
| 183 | { |
| 184 | struct stat st; |
| 185 | |
| 186 | /* |
| 187 | * if we are not doing real io, just pretend the file is as large |
| 188 | * as the size= given. this works fine with nrfiles > 1 as well, |
| 189 | * we only really care about it being at least as big as size= |
| 190 | */ |
| 191 | if (td->io_ops->flags & FIO_NULLIO) { |
| 192 | f->real_file_size = f->file_size = td->total_file_size; |
| 193 | return 0; |
| 194 | } |
| 195 | |
| 196 | if (td->overwrite) { |
| 197 | if (fstat(f->fd, &st) == -1) { |
| 198 | td_verror(td, errno, "fstat"); |
| 199 | return 1; |
| 200 | } |
| 201 | |
| 202 | f->real_file_size = st.st_size; |
| 203 | |
| 204 | if (!f->file_size || f->file_size > f->real_file_size) |
| 205 | f->file_size = f->real_file_size; |
| 206 | } else |
| 207 | f->real_file_size = f->file_size; |
| 208 | |
| 209 | return 0; |
| 210 | } |
| 211 | |
| 212 | static int bdev_size(struct thread_data *td, struct fio_file *f) |
| 213 | { |
| 214 | unsigned long long bytes; |
| 215 | int r; |
| 216 | |
| 217 | r = blockdev_size(f->fd, &bytes); |
| 218 | if (r) { |
| 219 | td_verror(td, r, "blockdev_size"); |
| 220 | return 1; |
| 221 | } |
| 222 | |
| 223 | f->real_file_size = bytes; |
| 224 | |
| 225 | /* |
| 226 | * no extend possibilities, so limit size to device size if too large |
| 227 | */ |
| 228 | if (!f->file_size || f->file_size > f->real_file_size) |
| 229 | f->file_size = f->real_file_size; |
| 230 | |
| 231 | f->file_size -= f->file_offset; |
| 232 | return 0; |
| 233 | } |
| 234 | |
| 235 | static int get_file_size(struct thread_data *td, struct fio_file *f) |
| 236 | { |
| 237 | int ret = 0; |
| 238 | |
| 239 | if (td->filetype == FIO_TYPE_FILE) |
| 240 | ret = file_size(td, f); |
| 241 | else if (td->filetype == FIO_TYPE_BD) |
| 242 | ret = bdev_size(td, f); |
| 243 | else |
| 244 | f->real_file_size = -1; |
| 245 | |
| 246 | if (ret) |
| 247 | return ret; |
| 248 | |
| 249 | if (f->file_offset > f->real_file_size) { |
| 250 | log_err("%s: offset extends end (%Lu > %Lu)\n", td->name, f->file_offset, f->real_file_size); |
| 251 | return 1; |
| 252 | } |
| 253 | |
| 254 | return 0; |
| 255 | } |
| 256 | |
| 257 | int file_invalidate_cache(struct thread_data *td, struct fio_file *f) |
| 258 | { |
| 259 | int ret = 0; |
| 260 | |
| 261 | /* |
| 262 | * FIXME: add blockdev flushing too |
| 263 | */ |
| 264 | if (td->io_ops->flags & FIO_MMAPIO) |
| 265 | ret = madvise(f->mmap, f->file_size, MADV_DONTNEED); |
| 266 | else if (td->filetype == FIO_TYPE_FILE) { |
| 267 | if (!td->odirect) |
| 268 | ret = fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_DONTNEED); |
| 269 | } else if (td->filetype == FIO_TYPE_BD) { |
| 270 | if (!td->odirect) |
| 271 | ret = blockdev_invalidate_cache(f->fd); |
| 272 | } else if (td->filetype == FIO_TYPE_CHAR) |
| 273 | ret = 0; |
| 274 | |
| 275 | if (ret < 0) { |
| 276 | td_verror(td, errno, "invalidate_cache"); |
| 277 | return 1; |
| 278 | } |
| 279 | |
| 280 | return ret; |
| 281 | } |
| 282 | |
| 283 | static int __setup_file_mmap(struct thread_data *td, struct fio_file *f) |
| 284 | { |
| 285 | int flags; |
| 286 | |
| 287 | if (td_rw(td)) |
| 288 | flags = PROT_READ | PROT_WRITE; |
| 289 | else if (td_write(td)) { |
| 290 | flags = PROT_WRITE; |
| 291 | |
| 292 | if (td->verify != VERIFY_NONE) |
| 293 | flags |= PROT_READ; |
| 294 | } else |
| 295 | flags = PROT_READ; |
| 296 | |
| 297 | f->mmap = mmap(NULL, f->file_size, flags, MAP_SHARED, f->fd, f->file_offset); |
| 298 | if (f->mmap == MAP_FAILED) { |
| 299 | f->mmap = NULL; |
| 300 | td_verror(td, errno, "mmap"); |
| 301 | return 1; |
| 302 | } |
| 303 | |
| 304 | if (td->invalidate_cache && file_invalidate_cache(td, f)) |
| 305 | return 1; |
| 306 | |
| 307 | if (!td_random(td)) { |
| 308 | if (madvise(f->mmap, f->file_size, MADV_SEQUENTIAL) < 0) { |
| 309 | td_verror(td, errno, "madvise"); |
| 310 | return 1; |
| 311 | } |
| 312 | } else { |
| 313 | if (madvise(f->mmap, f->file_size, MADV_RANDOM) < 0) { |
| 314 | td_verror(td, errno, "madvise"); |
| 315 | return 1; |
| 316 | } |
| 317 | } |
| 318 | |
| 319 | return 0; |
| 320 | } |
| 321 | |
| 322 | static int setup_files_mmap(struct thread_data *td) |
| 323 | { |
| 324 | struct fio_file *f; |
| 325 | int i, err = 0; |
| 326 | |
| 327 | for_each_file(td, f, i) { |
| 328 | err = __setup_file_mmap(td, f); |
| 329 | if (err) |
| 330 | break; |
| 331 | } |
| 332 | |
| 333 | return err; |
| 334 | } |
| 335 | |
| 336 | static int __setup_file_plain(struct thread_data *td, struct fio_file *f) |
| 337 | { |
| 338 | if (td->invalidate_cache && file_invalidate_cache(td, f)) |
| 339 | return 1; |
| 340 | |
| 341 | if (!td_random(td)) { |
| 342 | if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_SEQUENTIAL) < 0) { |
| 343 | td_verror(td, errno, "fadvise"); |
| 344 | return 1; |
| 345 | } |
| 346 | } else { |
| 347 | if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_RANDOM) < 0) { |
| 348 | td_verror(td, errno, "fadvise"); |
| 349 | return 1; |
| 350 | } |
| 351 | } |
| 352 | |
| 353 | return 0; |
| 354 | } |
| 355 | |
| 356 | static int setup_files_plain(struct thread_data *td) |
| 357 | { |
| 358 | struct fio_file *f; |
| 359 | int i, err = 0; |
| 360 | |
| 361 | for_each_file(td, f, i) { |
| 362 | err = __setup_file_plain(td, f); |
| 363 | if (err) |
| 364 | break; |
| 365 | } |
| 366 | |
| 367 | return err; |
| 368 | } |
| 369 | |
| 370 | static int setup_file(struct thread_data *td, struct fio_file *f) |
| 371 | { |
| 372 | int flags = 0; |
| 373 | |
| 374 | if (td->io_ops->flags & FIO_SELFOPEN) |
| 375 | return 0; |
| 376 | |
| 377 | /* |
| 378 | * we need a valid file descriptor, but don't create a real file. |
| 379 | * lets just dup stdout, seems like a sensible approach. |
| 380 | */ |
| 381 | if (td->io_ops->flags & FIO_NULLIO) |
| 382 | f->fd = dup(STDOUT_FILENO); |
| 383 | else { |
| 384 | if (td->odirect) |
| 385 | flags |= OS_O_DIRECT; |
| 386 | if (td->sync_io) |
| 387 | flags |= O_SYNC; |
| 388 | |
| 389 | if (td_write(td) || td_rw(td)) { |
| 390 | flags |= O_RDWR; |
| 391 | |
| 392 | if (td->filetype == FIO_TYPE_FILE) { |
| 393 | if (!td->overwrite) |
| 394 | flags |= O_TRUNC; |
| 395 | |
| 396 | flags |= O_CREAT; |
| 397 | } |
| 398 | |
| 399 | open_file(td, f, flags, 0600); |
| 400 | } else { |
| 401 | if (td->filetype == FIO_TYPE_CHAR) |
| 402 | flags |= O_RDWR; |
| 403 | else |
| 404 | flags |= O_RDONLY; |
| 405 | |
| 406 | open_file(td, f, flags, 0); |
| 407 | } |
| 408 | } |
| 409 | |
| 410 | if (f->fd == -1) { |
| 411 | int __e = errno; |
| 412 | |
| 413 | td_verror(td, __e, "open"); |
| 414 | if (__e == EINVAL && td->odirect) |
| 415 | log_err("fio: destination does not support O_DIRECT\n"); |
| 416 | return 1; |
| 417 | } |
| 418 | |
| 419 | if (get_file_size(td, f)) { |
| 420 | close_file(td, f); |
| 421 | return 1; |
| 422 | } |
| 423 | |
| 424 | return 0; |
| 425 | } |
| 426 | |
| 427 | int open_files(struct thread_data *td) |
| 428 | { |
| 429 | struct fio_file *f; |
| 430 | int i, err = 0; |
| 431 | |
| 432 | for_each_file(td, f, i) { |
| 433 | err = setup_file(td, f); |
| 434 | if (err) |
| 435 | break; |
| 436 | } |
| 437 | |
| 438 | if (!err) |
| 439 | return 0; |
| 440 | |
| 441 | for_each_file(td, f, i) |
| 442 | close_file(td, f); |
| 443 | |
| 444 | return err; |
| 445 | } |
| 446 | |
| 447 | int setup_files(struct thread_data *td) |
| 448 | { |
| 449 | struct fio_file *f; |
| 450 | int err, i; |
| 451 | |
| 452 | /* |
| 453 | * if ioengine defines a setup() method, it's responsible for |
| 454 | * setting up everything in the td->files[] area. |
| 455 | */ |
| 456 | if (td->io_ops->setup) |
| 457 | return td->io_ops->setup(td); |
| 458 | |
| 459 | if (create_files(td)) |
| 460 | return 1; |
| 461 | |
| 462 | err = open_files(td); |
| 463 | if (err) |
| 464 | return err; |
| 465 | |
| 466 | /* |
| 467 | * Recalculate the total file size now that files are set up. |
| 468 | */ |
| 469 | td->total_file_size = 0; |
| 470 | for_each_file(td, f, i) |
| 471 | td->total_file_size += f->file_size; |
| 472 | |
| 473 | td->io_size = td->total_file_size; |
| 474 | if (td->io_size == 0) { |
| 475 | log_err("%s: no io blocks\n", td->name); |
| 476 | td_verror(td, EINVAL, "total_file_size"); |
| 477 | return 1; |
| 478 | } |
| 479 | |
| 480 | if (!td->zone_size) |
| 481 | td->zone_size = td->io_size; |
| 482 | |
| 483 | td->total_io_size = td->io_size * td->loops; |
| 484 | |
| 485 | if (td->io_ops->flags & FIO_MMAPIO) |
| 486 | err = setup_files_mmap(td); |
| 487 | else |
| 488 | err = setup_files_plain(td); |
| 489 | |
| 490 | for_each_file(td, f, i) |
| 491 | close_file(td, f); |
| 492 | |
| 493 | return err; |
| 494 | } |
| 495 | |
| 496 | void close_files(struct thread_data *td) |
| 497 | { |
| 498 | struct fio_file *f; |
| 499 | int i; |
| 500 | |
| 501 | for_each_file(td, f, i) { |
| 502 | if (!td->filename && f->unlink && |
| 503 | td->filetype == FIO_TYPE_FILE) { |
| 504 | unlink(f->file_name); |
| 505 | free(f->file_name); |
| 506 | f->file_name = NULL; |
| 507 | } |
| 508 | |
| 509 | close_file(td, f); |
| 510 | |
| 511 | if (f->mmap) { |
| 512 | munmap(f->mmap, f->file_size); |
| 513 | f->mmap = NULL; |
| 514 | } |
| 515 | } |
| 516 | |
| 517 | td->filename = NULL; |
| 518 | free(td->files); |
| 519 | td->files = NULL; |
| 520 | td->nr_files = 0; |
| 521 | } |