1 /* 2 * windowsaio engine 3 * 4 * IO engine using Windows IO Completion Ports. 5 */ 6 7 #include <stdio.h> 8 #include <stdlib.h> 9 #include <unistd.h> 10 #include <signal.h> 11 #include <errno.h> 12 13 #include "../fio.h" 14 15 typedef BOOL (WINAPI *CANCELIOEX)(HANDLE hFile, LPOVERLAPPED lpOverlapped); 16 17 int geterrno_from_win_error (DWORD code, int deferrno); 18 19 struct fio_overlapped { 20 OVERLAPPED o; 21 struct io_u *io_u; 22 BOOL io_complete; 23 }; 24 25 struct windowsaio_data { 26 struct io_u **aio_events; 27 HANDLE iocp; 28 HANDLE iothread; 29 HANDLE iocomplete_event; 30 BOOL iothread_running; 31 }; 32 33 struct thread_ctx { 34 HANDLE iocp; 35 struct windowsaio_data *wd; 36 }; 37 38 static BOOL timeout_expired(DWORD start_count, DWORD end_count); 39 static int fio_windowsaio_getevents(struct thread_data *td, unsigned int min, 40 unsigned int max, const struct timespec *t); 41 static struct io_u *fio_windowsaio_event(struct thread_data *td, int event); 42 static int fio_windowsaio_queue(struct thread_data *td, 43 struct io_u *io_u); 44 static void fio_windowsaio_cleanup(struct thread_data *td); 45 static DWORD WINAPI IoCompletionRoutine(LPVOID lpParameter); 46 static int fio_windowsaio_init(struct thread_data *td); 47 static int fio_windowsaio_open_file(struct thread_data *td, struct fio_file *f); 48 static int fio_windowsaio_close_file(struct thread_data fio_unused *td, struct fio_file *f); 49 50 static int fio_windowsaio_init(struct thread_data *td) 51 { 52 struct windowsaio_data *wd; 53 int rc = 0; 54 55 wd = calloc(1, sizeof(struct windowsaio_data)); 56 if (wd == NULL) { 57 log_err("windowsaio: failed to allocate memory for engine data\n"); 58 rc = 1; 59 } 60 61 if (!rc) { 62 wd->aio_events = malloc(td->o.iodepth * sizeof(struct io_u*)); 63 if (wd->aio_events == NULL) { 64 log_err("windowsaio: failed to allocate memory for aio events list\n"); 65 rc = 1; 66 } 67 } 68 69 if (!rc) { 70 /* Create an auto-reset event */ 71 wd->iocomplete_event = CreateEvent(NULL, FALSE, FALSE, NULL); 72 if (wd->iocomplete_event == NULL) { 73 log_err("windowsaio: failed to create io complete event handle\n"); 74 rc = 1; 75 } 76 } 77 78 if (rc) { 79 if (wd != NULL) { 80 if (wd->aio_events != NULL) 81 free(wd->aio_events); 82 83 free(wd); 84 } 85 } 86 87 td->io_ops_data = wd; 88 89 if (!rc) { 90 struct thread_ctx *ctx; 91 struct windowsaio_data *wd; 92 HANDLE hFile; 93 94 hFile = CreateIoCompletionPort(INVALID_HANDLE_VALUE, NULL, 0, 0); 95 if (hFile == INVALID_HANDLE_VALUE) { 96 log_err("windowsaio: failed to create io completion port\n"); 97 rc = 1; 98 } 99 100 wd = td->io_ops_data; 101 wd->iothread_running = TRUE; 102 wd->iocp = hFile; 103 104 if (!rc) 105 ctx = malloc(sizeof(struct thread_ctx)); 106 107 if (!rc && ctx == NULL) 108 { 109 log_err("windowsaio: failed to allocate memory for thread context structure\n"); 110 CloseHandle(hFile); 111 rc = 1; 112 } 113 114 if (!rc) 115 { 116 DWORD threadid; 117 118 ctx->iocp = hFile; 119 ctx->wd = wd; 120 wd->iothread = CreateThread(NULL, 0, IoCompletionRoutine, ctx, 0, &threadid); 121 122 if (wd->iothread != NULL) 123 fio_setaffinity(threadid, td->o.cpumask); 124 else 125 log_err("windowsaio: failed to create io completion thread\n"); 126 } 127 128 if (rc || wd->iothread == NULL) 129 rc = 1; 130 } 131 132 return rc; 133 } 134 135 static void fio_windowsaio_cleanup(struct thread_data *td) 136 { 137 struct windowsaio_data *wd; 138 139 wd = td->io_ops_data; 140 141 if (wd != NULL) { 142 wd->iothread_running = FALSE; 143 WaitForSingleObject(wd->iothread, INFINITE); 144 145 CloseHandle(wd->iothread); 146 CloseHandle(wd->iocomplete_event); 147 148 free(wd->aio_events); 149 free(wd); 150 151 td->io_ops_data = NULL; 152 } 153 } 154 155 156 static int fio_windowsaio_open_file(struct thread_data *td, struct fio_file *f) 157 { 158 int rc = 0; 159 DWORD flags = FILE_FLAG_POSIX_SEMANTICS | FILE_FLAG_OVERLAPPED; 160 DWORD sharemode = FILE_SHARE_READ | FILE_SHARE_WRITE; 161 DWORD openmode = OPEN_ALWAYS; 162 DWORD access; 163 164 dprint(FD_FILE, "fd open %s\n", f->file_name); 165 166 if (f->filetype == FIO_TYPE_PIPE) { 167 log_err("windowsaio: pipes are not supported\n"); 168 return 1; 169 } 170 171 if (!strcmp(f->file_name, "-")) { 172 log_err("windowsaio: can't read/write to stdin/out\n"); 173 return 1; 174 } 175 176 if (td->o.odirect) 177 flags |= FILE_FLAG_NO_BUFFERING; 178 if (td->o.sync_io) 179 flags |= FILE_FLAG_WRITE_THROUGH; 180 181 /* 182 * Inform Windows whether we're going to be doing sequential or 183 * random io so it can tune the Cache Manager 184 */ 185 if (td->o.td_ddir == TD_DDIR_READ || 186 td->o.td_ddir == TD_DDIR_WRITE) 187 flags |= FILE_FLAG_SEQUENTIAL_SCAN; 188 else 189 flags |= FILE_FLAG_RANDOM_ACCESS; 190 191 if (!td_write(td) || read_only) 192 access = GENERIC_READ; 193 else 194 access = (GENERIC_READ | GENERIC_WRITE); 195 196 if (td->o.create_on_open) 197 openmode = OPEN_ALWAYS; 198 else 199 openmode = OPEN_EXISTING; 200 201 f->hFile = CreateFile(f->file_name, access, sharemode, 202 NULL, openmode, flags, NULL); 203 204 if (f->hFile == INVALID_HANDLE_VALUE) { 205 log_err("windowsaio: failed to open file \"%s\"\n", f->file_name); 206 rc = 1; 207 } 208 209 /* Only set up the completion port and thread if we're not just 210 * querying the device size */ 211 if (!rc && td->io_ops_data != NULL) { 212 struct windowsaio_data *wd; 213 214 wd = td->io_ops_data; 215 216 if (CreateIoCompletionPort(f->hFile, wd->iocp, 0, 0) == NULL) { 217 log_err("windowsaio: failed to create io completion port\n"); 218 rc = 1; 219 } 220 } 221 222 return rc; 223 } 224 225 static int fio_windowsaio_close_file(struct thread_data fio_unused *td, struct fio_file *f) 226 { 227 int rc = 0; 228 229 dprint(FD_FILE, "fd close %s\n", f->file_name); 230 231 if (f->hFile != INVALID_HANDLE_VALUE) { 232 if (!CloseHandle(f->hFile)) { 233 log_info("windowsaio: failed to close file handle for \"%s\"\n", f->file_name); 234 rc = 1; 235 } 236 } 237 238 f->hFile = INVALID_HANDLE_VALUE; 239 return rc; 240 } 241 242 static BOOL timeout_expired(DWORD start_count, DWORD end_count) 243 { 244 BOOL expired = FALSE; 245 DWORD current_time; 246 247 current_time = GetTickCount(); 248 249 if ((end_count > start_count) && current_time >= end_count) 250 expired = TRUE; 251 else if (current_time < start_count && current_time > end_count) 252 expired = TRUE; 253 254 return expired; 255 } 256 257 static struct io_u* fio_windowsaio_event(struct thread_data *td, int event) 258 { 259 struct windowsaio_data *wd = td->io_ops_data; 260 return wd->aio_events[event]; 261 } 262 263 static int fio_windowsaio_getevents(struct thread_data *td, unsigned int min, 264 unsigned int max, 265 const struct timespec *t) 266 { 267 struct windowsaio_data *wd = td->io_ops_data; 268 unsigned int dequeued = 0; 269 struct io_u *io_u; 270 int i; 271 struct fio_overlapped *fov; 272 DWORD start_count = 0; 273 DWORD end_count = 0; 274 DWORD status; 275 DWORD mswait = 250; 276 277 if (t != NULL) { 278 mswait = (t->tv_sec * 1000) + (t->tv_nsec / 1000000); 279 start_count = GetTickCount(); 280 end_count = start_count + (t->tv_sec * 1000) + (t->tv_nsec / 1000000); 281 } 282 283 do { 284 io_u_qiter(&td->io_u_all, io_u, i) { 285 if (!(io_u->flags & IO_U_F_FLIGHT)) 286 continue; 287 288 fov = (struct fio_overlapped*)io_u->engine_data; 289 290 if (fov->io_complete) { 291 fov->io_complete = FALSE; 292 wd->aio_events[dequeued] = io_u; 293 dequeued++; 294 } 295 296 } 297 if (dequeued >= min) 298 break; 299 300 if (dequeued < min) { 301 status = WaitForSingleObject(wd->iocomplete_event, mswait); 302 if (status != WAIT_OBJECT_0 && dequeued >= min) 303 break; 304 } 305 306 if (dequeued >= min || (t != NULL && timeout_expired(start_count, end_count))) 307 break; 308 } while (1); 309 310 return dequeued; 311 } 312 313 static int fio_windowsaio_queue(struct thread_data *td, struct io_u *io_u) 314 { 315 struct fio_overlapped *o = io_u->engine_data; 316 LPOVERLAPPED lpOvl = &o->o; 317 BOOL success = FALSE; 318 int rc = FIO_Q_COMPLETED; 319 320 fio_ro_check(td, io_u); 321 322 lpOvl->Internal = 0; 323 lpOvl->InternalHigh = 0; 324 lpOvl->Offset = io_u->offset & 0xFFFFFFFF; 325 lpOvl->OffsetHigh = io_u->offset >> 32; 326 327 switch (io_u->ddir) { 328 case DDIR_WRITE: 329 success = WriteFile(io_u->file->hFile, io_u->xfer_buf, io_u->xfer_buflen, NULL, lpOvl); 330 break; 331 case DDIR_READ: 332 success = ReadFile(io_u->file->hFile, io_u->xfer_buf, io_u->xfer_buflen, NULL, lpOvl); 333 break; 334 case DDIR_SYNC: 335 case DDIR_DATASYNC: 336 case DDIR_SYNC_FILE_RANGE: 337 success = FlushFileBuffers(io_u->file->hFile); 338 if (!success) { 339 log_err("windowsaio: failed to flush file buffers\n"); 340 io_u->error = win_to_posix_error(GetLastError()); 341 } 342 343 return FIO_Q_COMPLETED; 344 break; 345 case DDIR_TRIM: 346 log_err("windowsaio: manual TRIM isn't supported on Windows\n"); 347 io_u->error = 1; 348 io_u->resid = io_u->xfer_buflen; 349 return FIO_Q_COMPLETED; 350 break; 351 default: 352 assert(0); 353 break; 354 } 355 356 if (success || GetLastError() == ERROR_IO_PENDING) 357 rc = FIO_Q_QUEUED; 358 else { 359 io_u->error = win_to_posix_error(GetLastError()); 360 io_u->resid = io_u->xfer_buflen; 361 } 362 363 return rc; 364 } 365 366 /* Runs as a thread and waits for queued IO to complete */ 367 static DWORD WINAPI IoCompletionRoutine(LPVOID lpParameter) 368 { 369 OVERLAPPED *ovl; 370 struct fio_overlapped *fov; 371 struct io_u *io_u; 372 struct windowsaio_data *wd; 373 struct thread_ctx *ctx; 374 ULONG_PTR ulKey = 0; 375 DWORD bytes; 376 377 ctx = (struct thread_ctx*)lpParameter; 378 wd = ctx->wd; 379 380 do { 381 if (!GetQueuedCompletionStatus(ctx->iocp, &bytes, &ulKey, &ovl, 250) && ovl == NULL) 382 continue; 383 384 fov = CONTAINING_RECORD(ovl, struct fio_overlapped, o); 385 io_u = fov->io_u; 386 387 if (ovl->Internal == ERROR_SUCCESS) { 388 io_u->resid = io_u->xfer_buflen - ovl->InternalHigh; 389 io_u->error = 0; 390 } else { 391 io_u->resid = io_u->xfer_buflen; 392 io_u->error = win_to_posix_error(GetLastError()); 393 } 394 395 fov->io_complete = TRUE; 396 SetEvent(wd->iocomplete_event); 397 } while (ctx->wd->iothread_running); 398 399 CloseHandle(ctx->iocp); 400 free(ctx); 401 return 0; 402 } 403 404 static void fio_windowsaio_io_u_free(struct thread_data *td, struct io_u *io_u) 405 { 406 struct fio_overlapped *o = io_u->engine_data; 407 408 if (o) { 409 io_u->engine_data = NULL; 410 free(o); 411 } 412 } 413 414 static int fio_windowsaio_io_u_init(struct thread_data *td, struct io_u *io_u) 415 { 416 struct fio_overlapped *o; 417 418 o = malloc(sizeof(*o)); 419 o->io_complete = FALSE; 420 o->io_u = io_u; 421 o->o.hEvent = NULL; 422 io_u->engine_data = o; 423 return 0; 424 } 425 426 static struct ioengine_ops ioengine = { 427 .name = "windowsaio", 428 .version = FIO_IOOPS_VERSION, 429 .init = fio_windowsaio_init, 430 .queue = fio_windowsaio_queue, 431 .getevents = fio_windowsaio_getevents, 432 .event = fio_windowsaio_event, 433 .cleanup = fio_windowsaio_cleanup, 434 .open_file = fio_windowsaio_open_file, 435 .close_file = fio_windowsaio_close_file, 436 .get_file_size = generic_get_file_size, 437 .io_u_init = fio_windowsaio_io_u_init, 438 .io_u_free = fio_windowsaio_io_u_free, 439 }; 440 441 static void fio_init fio_windowsaio_register(void) 442 { 443 register_ioengine(&ioengine); 444 } 445 446 static void fio_exit fio_windowsaio_unregister(void) 447 { 448 unregister_ioengine(&ioengine); 449 } 450
