Commit | Line | Data |
---|---|---|
52885fa2 JA |
1 | /* |
2 | * aioring engine | |
3 | * | |
a90cd050 JA |
4 | * IO engine using the new native Linux libaio ring interface. See: |
5 | * | |
6 | * http://git.kernel.dk/cgit/linux-block/log/?h=aio-poll | |
52885fa2 JA |
7 | * |
8 | */ | |
9 | #include <stdlib.h> | |
10 | #include <unistd.h> | |
11 | #include <errno.h> | |
12 | #include <libaio.h> | |
13 | #include <sys/time.h> | |
14 | #include <sys/resource.h> | |
15 | ||
16 | #include "../fio.h" | |
17 | #include "../lib/pow2.h" | |
18 | #include "../optgroup.h" | |
19 | #include "../lib/memalign.h" | |
20 | ||
a30e63cf JA |
21 | #ifdef ARCH_HAVE_AIORING |
22 | ||
52885fa2 JA |
23 | #ifndef IOCB_FLAG_HIPRI |
24 | #define IOCB_FLAG_HIPRI (1 << 2) | |
25 | #endif | |
26 | ||
27 | /* | |
28 | * io_setup2(2) flags | |
29 | */ | |
30 | #ifndef IOCTX_FLAG_IOPOLL | |
31 | #define IOCTX_FLAG_IOPOLL (1 << 0) | |
32 | #endif | |
33 | #ifndef IOCTX_FLAG_SCQRING | |
34 | #define IOCTX_FLAG_SCQRING (1 << 1) | |
35 | #endif | |
36 | #ifndef IOCTX_FLAG_FIXEDBUFS | |
37 | #define IOCTX_FLAG_FIXEDBUFS (1 << 2) | |
38 | #endif | |
39 | #ifndef IOCTX_FLAG_SQTHREAD | |
40 | #define IOCTX_FLAG_SQTHREAD (1 << 3) | |
41 | #endif | |
42 | #ifndef IOCTX_FLAG_SQWQ | |
43 | #define IOCTX_FLAG_SQWQ (1 << 4) | |
44 | #endif | |
771c9901 JA |
45 | #ifndef IOCTX_FLAG_SQPOLL |
46 | #define IOCTX_FLAG_SQPOLL (1 << 5) | |
47 | #endif | |
48 | ||
52885fa2 JA |
49 | |
50 | /* | |
51 | * io_ring_enter(2) flags | |
52 | */ | |
53 | #ifndef IORING_FLAG_SUBMIT | |
54 | #define IORING_FLAG_SUBMIT (1 << 0) | |
55 | #endif | |
56 | #ifndef IORING_FLAG_GETEVENTS | |
57 | #define IORING_FLAG_GETEVENTS (1 << 1) | |
58 | #endif | |
59 | ||
60 | typedef uint64_t u64; | |
61 | typedef uint32_t u32; | |
62 | typedef uint16_t u16; | |
63 | ||
4cdbc048 JA |
64 | #define IORING_SQ_NEED_WAKEUP (1 << 0) |
65 | ||
96563db9 JA |
66 | #define IOEV_RES2_CACHEHIT (1 << 0) |
67 | ||
52885fa2 JA |
68 | struct aio_sq_ring { |
69 | union { | |
70 | struct { | |
71 | u32 head; | |
72 | u32 tail; | |
73 | u32 nr_events; | |
74 | u16 sq_thread_cpu; | |
4cdbc048 | 75 | u16 kflags; |
52885fa2 JA |
76 | u64 iocbs; |
77 | }; | |
78 | u32 pad[16]; | |
79 | }; | |
80 | u32 array[0]; | |
81 | }; | |
82 | ||
83 | struct aio_cq_ring { | |
84 | union { | |
85 | struct { | |
86 | u32 head; | |
87 | u32 tail; | |
88 | u32 nr_events; | |
89 | }; | |
90 | struct io_event pad; | |
91 | }; | |
92 | struct io_event events[0]; | |
93 | }; | |
94 | ||
95 | struct aioring_data { | |
96 | io_context_t aio_ctx; | |
97 | struct io_u **io_us; | |
98 | struct io_u **io_u_index; | |
99 | ||
100 | struct aio_sq_ring *sq_ring; | |
101 | struct iocb *iocbs; | |
102 | ||
103 | struct aio_cq_ring *cq_ring; | |
104 | struct io_event *events; | |
105 | ||
106 | int queued; | |
107 | int cq_ring_off; | |
96563db9 JA |
108 | |
109 | uint64_t cachehit; | |
110 | uint64_t cachemiss; | |
52885fa2 JA |
111 | }; |
112 | ||
113 | struct aioring_options { | |
114 | void *pad; | |
115 | unsigned int hipri; | |
116 | unsigned int fixedbufs; | |
a90cd050 JA |
117 | unsigned int sqthread; |
118 | unsigned int sqthread_set; | |
771c9901 | 119 | unsigned int sqthread_poll; |
a90cd050 | 120 | unsigned int sqwq; |
52885fa2 JA |
121 | }; |
122 | ||
a90cd050 JA |
123 | static int fio_aioring_sqthread_cb(void *data, |
124 | unsigned long long *val) | |
125 | { | |
126 | struct aioring_options *o = data; | |
127 | ||
128 | o->sqthread = *val; | |
129 | o->sqthread_set = 1; | |
130 | return 0; | |
131 | } | |
132 | ||
52885fa2 JA |
133 | static struct fio_option options[] = { |
134 | { | |
135 | .name = "hipri", | |
136 | .lname = "High Priority", | |
137 | .type = FIO_OPT_STR_SET, | |
138 | .off1 = offsetof(struct aioring_options, hipri), | |
139 | .help = "Use polled IO completions", | |
140 | .category = FIO_OPT_C_ENGINE, | |
141 | .group = FIO_OPT_G_LIBAIO, | |
142 | }, | |
143 | { | |
144 | .name = "fixedbufs", | |
145 | .lname = "Fixed (pre-mapped) IO buffers", | |
146 | .type = FIO_OPT_STR_SET, | |
147 | .off1 = offsetof(struct aioring_options, fixedbufs), | |
148 | .help = "Pre map IO buffers", | |
149 | .category = FIO_OPT_C_ENGINE, | |
150 | .group = FIO_OPT_G_LIBAIO, | |
151 | }, | |
a90cd050 JA |
152 | { |
153 | .name = "sqthread", | |
154 | .lname = "Use kernel SQ thread on this CPU", | |
155 | .type = FIO_OPT_INT, | |
156 | .cb = fio_aioring_sqthread_cb, | |
157 | .help = "Offload submission to kernel thread", | |
158 | .category = FIO_OPT_C_ENGINE, | |
159 | .group = FIO_OPT_G_LIBAIO, | |
160 | }, | |
771c9901 JA |
161 | { |
162 | .name = "sqthread_poll", | |
163 | .lname = "Kernel SQ thread should poll", | |
164 | .type = FIO_OPT_STR_SET, | |
165 | .off1 = offsetof(struct aioring_options, sqthread_poll), | |
166 | .help = "Used with sqthread, enables kernel side polling", | |
167 | .category = FIO_OPT_C_ENGINE, | |
168 | .group = FIO_OPT_G_LIBAIO, | |
169 | }, | |
a90cd050 JA |
170 | { |
171 | .name = "sqwq", | |
172 | .lname = "Offload submission to kernel workqueue", | |
173 | .type = FIO_OPT_STR_SET, | |
174 | .off1 = offsetof(struct aioring_options, sqwq), | |
175 | .help = "Offload submission to kernel workqueue", | |
176 | .category = FIO_OPT_C_ENGINE, | |
177 | .group = FIO_OPT_G_LIBAIO, | |
178 | }, | |
52885fa2 JA |
179 | { |
180 | .name = NULL, | |
181 | }, | |
182 | }; | |
183 | ||
52885fa2 JA |
184 | static int io_ring_enter(io_context_t ctx, unsigned int to_submit, |
185 | unsigned int min_complete, unsigned int flags) | |
186 | { | |
52885fa2 JA |
187 | return syscall(__NR_sys_io_ring_enter, ctx, to_submit, min_complete, |
188 | flags); | |
52885fa2 JA |
189 | } |
190 | ||
191 | static int fio_aioring_prep(struct thread_data *td, struct io_u *io_u) | |
192 | { | |
193 | struct aioring_data *ld = td->io_ops_data; | |
194 | struct fio_file *f = io_u->file; | |
195 | struct aioring_options *o = td->eo; | |
196 | struct iocb *iocb; | |
197 | ||
198 | iocb = &ld->iocbs[io_u->index]; | |
199 | ||
e3970057 JA |
200 | if (io_u->ddir == DDIR_READ || io_u->ddir == DDIR_WRITE) { |
201 | if (io_u->ddir == DDIR_READ) | |
52885fa2 | 202 | iocb->aio_lio_opcode = IO_CMD_PREAD; |
e3970057 | 203 | else |
52885fa2 | 204 | iocb->aio_lio_opcode = IO_CMD_PWRITE; |
e3970057 JA |
205 | iocb->aio_reqprio = 0; |
206 | iocb->aio_fildes = f->fd; | |
207 | iocb->u.c.buf = io_u->xfer_buf; | |
208 | iocb->u.c.nbytes = io_u->xfer_buflen; | |
209 | iocb->u.c.offset = io_u->offset; | |
210 | if (o->hipri) | |
211 | iocb->u.c.flags |= IOCB_FLAG_HIPRI; | |
212 | else | |
213 | iocb->u.c.flags = 0; | |
52885fa2 JA |
214 | } else if (ddir_sync(io_u->ddir)) |
215 | io_prep_fsync(iocb, f->fd); | |
216 | ||
217 | iocb->data = io_u; | |
218 | return 0; | |
219 | } | |
220 | ||
221 | static struct io_u *fio_aioring_event(struct thread_data *td, int event) | |
222 | { | |
223 | struct aioring_data *ld = td->io_ops_data; | |
224 | struct io_event *ev; | |
225 | struct io_u *io_u; | |
226 | int index; | |
227 | ||
228 | index = event + ld->cq_ring_off; | |
229 | if (index >= ld->cq_ring->nr_events) | |
230 | index -= ld->cq_ring->nr_events; | |
231 | ||
232 | ev = &ld->cq_ring->events[index]; | |
233 | io_u = ev->data; | |
234 | ||
235 | if (ev->res != io_u->xfer_buflen) { | |
236 | if (ev->res > io_u->xfer_buflen) | |
237 | io_u->error = -ev->res; | |
238 | else | |
239 | io_u->resid = io_u->xfer_buflen - ev->res; | |
240 | } else | |
241 | io_u->error = 0; | |
242 | ||
96563db9 JA |
243 | if (io_u->ddir == DDIR_READ) { |
244 | if (ev->res2 & IOEV_RES2_CACHEHIT) | |
245 | ld->cachehit++; | |
246 | else | |
247 | ld->cachemiss++; | |
248 | } | |
249 | ||
52885fa2 JA |
250 | return io_u; |
251 | } | |
252 | ||
253 | static int fio_aioring_cqring_reap(struct thread_data *td, unsigned int events, | |
254 | unsigned int max) | |
255 | { | |
256 | struct aioring_data *ld = td->io_ops_data; | |
257 | struct aio_cq_ring *ring = ld->cq_ring; | |
258 | u32 head, reaped = 0; | |
259 | ||
260 | head = ring->head; | |
261 | do { | |
262 | read_barrier(); | |
263 | if (head == ring->tail) | |
264 | break; | |
265 | reaped++; | |
266 | head++; | |
267 | if (head == ring->nr_events) | |
268 | head = 0; | |
269 | } while (reaped + events < max); | |
270 | ||
271 | ring->head = head; | |
272 | write_barrier(); | |
273 | return reaped; | |
274 | } | |
275 | ||
276 | static int fio_aioring_getevents(struct thread_data *td, unsigned int min, | |
277 | unsigned int max, const struct timespec *t) | |
278 | { | |
279 | struct aioring_data *ld = td->io_ops_data; | |
280 | unsigned actual_min = td->o.iodepth_batch_complete_min == 0 ? 0 : min; | |
771c9901 | 281 | struct aioring_options *o = td->eo; |
52885fa2 JA |
282 | struct aio_cq_ring *ring = ld->cq_ring; |
283 | int r, events = 0; | |
284 | ||
285 | ld->cq_ring_off = ring->head; | |
286 | do { | |
287 | r = fio_aioring_cqring_reap(td, events, max); | |
288 | if (r) { | |
289 | events += r; | |
290 | continue; | |
291 | } | |
292 | ||
771c9901 JA |
293 | if (!o->sqthread_poll) { |
294 | r = io_ring_enter(ld->aio_ctx, 0, actual_min, | |
295 | IORING_FLAG_GETEVENTS); | |
296 | if (r < 0) { | |
297 | if (errno == EAGAIN) | |
298 | continue; | |
299 | td_verror(td, errno, "io_ring_enter get"); | |
300 | break; | |
301 | } | |
52885fa2 JA |
302 | } |
303 | } while (events < min); | |
304 | ||
305 | return r < 0 ? r : events; | |
306 | } | |
307 | ||
308 | static enum fio_q_status fio_aioring_queue(struct thread_data *td, | |
309 | struct io_u *io_u) | |
310 | { | |
311 | struct aioring_data *ld = td->io_ops_data; | |
312 | struct aio_sq_ring *ring = ld->sq_ring; | |
313 | unsigned tail, next_tail; | |
314 | ||
315 | fio_ro_check(td, io_u); | |
316 | ||
317 | if (ld->queued == td->o.iodepth) | |
318 | return FIO_Q_BUSY; | |
319 | ||
52885fa2 JA |
320 | if (io_u->ddir == DDIR_TRIM) { |
321 | if (ld->queued) | |
322 | return FIO_Q_BUSY; | |
323 | ||
324 | do_io_u_trim(td, io_u); | |
325 | io_u_mark_submit(td, 1); | |
326 | io_u_mark_complete(td, 1); | |
327 | return FIO_Q_COMPLETED; | |
328 | } | |
329 | ||
330 | tail = ring->tail; | |
331 | next_tail = tail + 1; | |
332 | if (next_tail == ring->nr_events) | |
333 | next_tail = 0; | |
334 | read_barrier(); | |
335 | if (next_tail == ring->head) | |
336 | return FIO_Q_BUSY; | |
337 | ||
338 | ring->array[tail] = io_u->index; | |
339 | ring->tail = next_tail; | |
340 | write_barrier(); | |
341 | ||
342 | ld->queued++; | |
343 | return FIO_Q_QUEUED; | |
344 | } | |
345 | ||
346 | static void fio_aioring_queued(struct thread_data *td, int start, int nr) | |
347 | { | |
348 | struct aioring_data *ld = td->io_ops_data; | |
349 | struct timespec now; | |
350 | ||
351 | if (!fio_fill_issue_time(td)) | |
352 | return; | |
353 | ||
354 | fio_gettime(&now, NULL); | |
355 | ||
356 | while (nr--) { | |
357 | int index = ld->sq_ring->array[start]; | |
358 | struct io_u *io_u = io_u = ld->io_u_index[index]; | |
359 | ||
360 | memcpy(&io_u->issue_time, &now, sizeof(now)); | |
361 | io_u_queued(td, io_u); | |
362 | ||
363 | start++; | |
364 | if (start == ld->sq_ring->nr_events) | |
365 | start = 0; | |
366 | } | |
367 | } | |
368 | ||
369 | static int fio_aioring_commit(struct thread_data *td) | |
370 | { | |
371 | struct aioring_data *ld = td->io_ops_data; | |
771c9901 | 372 | struct aioring_options *o = td->eo; |
52885fa2 JA |
373 | int ret; |
374 | ||
375 | if (!ld->queued) | |
376 | return 0; | |
377 | ||
771c9901 JA |
378 | /* Nothing to do */ |
379 | if (o->sqthread_poll) { | |
4cdbc048 JA |
380 | struct aio_sq_ring *ring = ld->sq_ring; |
381 | ||
382 | if (ring->kflags & IORING_SQ_NEED_WAKEUP) | |
383 | io_ring_enter(ld->aio_ctx, ld->queued, 0, IORING_FLAG_SUBMIT); | |
771c9901 JA |
384 | ld->queued = 0; |
385 | return 0; | |
386 | } | |
387 | ||
52885fa2 JA |
388 | do { |
389 | int start = ld->sq_ring->head; | |
390 | long nr = ld->queued; | |
391 | ||
392 | ret = io_ring_enter(ld->aio_ctx, nr, 0, IORING_FLAG_SUBMIT | | |
393 | IORING_FLAG_GETEVENTS); | |
52885fa2 JA |
394 | if (ret > 0) { |
395 | fio_aioring_queued(td, start, ret); | |
396 | io_u_mark_submit(td, ret); | |
397 | ||
398 | ld->queued -= ret; | |
399 | ret = 0; | |
a90cd050 JA |
400 | } else if (!ret) { |
401 | io_u_mark_submit(td, ret); | |
52885fa2 | 402 | continue; |
a90cd050 JA |
403 | } else { |
404 | if (errno == EAGAIN) { | |
405 | ret = fio_aioring_cqring_reap(td, 0, ld->queued); | |
406 | if (ret) | |
407 | continue; | |
408 | /* Shouldn't happen */ | |
409 | usleep(1); | |
410 | continue; | |
52885fa2 | 411 | } |
a90cd050 | 412 | td_verror(td, errno, "io_ring_enter sumit"); |
52885fa2 | 413 | break; |
a90cd050 | 414 | } |
52885fa2 JA |
415 | } while (ld->queued); |
416 | ||
417 | return ret; | |
418 | } | |
419 | ||
420 | static size_t aioring_cq_size(struct thread_data *td) | |
421 | { | |
422 | return sizeof(struct aio_cq_ring) + 2 * td->o.iodepth * sizeof(struct io_event); | |
423 | } | |
424 | ||
425 | static size_t aioring_sq_iocb(struct thread_data *td) | |
426 | { | |
427 | return sizeof(struct iocb) * td->o.iodepth; | |
428 | } | |
429 | ||
430 | static size_t aioring_sq_size(struct thread_data *td) | |
431 | { | |
432 | return sizeof(struct aio_sq_ring) + td->o.iodepth * sizeof(u32); | |
433 | } | |
434 | ||
435 | static void fio_aioring_cleanup(struct thread_data *td) | |
436 | { | |
437 | struct aioring_data *ld = td->io_ops_data; | |
438 | ||
439 | if (ld) { | |
96563db9 JA |
440 | td->ts.cachehit += ld->cachehit; |
441 | td->ts.cachemiss += ld->cachemiss; | |
442 | ||
a90cd050 JA |
443 | /* Bump depth to match init depth */ |
444 | td->o.iodepth++; | |
445 | ||
52885fa2 JA |
446 | /* |
447 | * Work-around to avoid huge RCU stalls at exit time. If we | |
448 | * don't do this here, then it'll be torn down by exit_aio(). | |
449 | * But for that case we can parallellize the freeing, thus | |
450 | * speeding it up a lot. | |
451 | */ | |
452 | if (!(td->flags & TD_F_CHILD)) | |
453 | io_destroy(ld->aio_ctx); | |
454 | free(ld->io_u_index); | |
455 | free(ld->io_us); | |
456 | fio_memfree(ld->sq_ring, aioring_sq_size(td), false); | |
457 | fio_memfree(ld->iocbs, aioring_sq_iocb(td), false); | |
458 | fio_memfree(ld->cq_ring, aioring_cq_size(td), false); | |
459 | free(ld); | |
460 | } | |
461 | } | |
462 | ||
463 | static int fio_aioring_queue_init(struct thread_data *td) | |
464 | { | |
52885fa2 JA |
465 | struct aioring_data *ld = td->io_ops_data; |
466 | struct aioring_options *o = td->eo; | |
467 | int flags = IOCTX_FLAG_SCQRING; | |
468 | int depth = td->o.iodepth; | |
469 | ||
470 | if (o->hipri) | |
471 | flags |= IOCTX_FLAG_IOPOLL; | |
a90cd050 JA |
472 | if (o->sqthread_set) { |
473 | ld->sq_ring->sq_thread_cpu = o->sqthread; | |
474 | flags |= IOCTX_FLAG_SQTHREAD; | |
771c9901 JA |
475 | if (o->sqthread_poll) |
476 | flags |= IOCTX_FLAG_SQPOLL; | |
f635f1fb JA |
477 | } |
478 | if (o->sqwq) | |
a90cd050 JA |
479 | flags |= IOCTX_FLAG_SQWQ; |
480 | ||
52885fa2 JA |
481 | if (o->fixedbufs) { |
482 | struct rlimit rlim = { | |
483 | .rlim_cur = RLIM_INFINITY, | |
484 | .rlim_max = RLIM_INFINITY, | |
485 | }; | |
486 | ||
487 | setrlimit(RLIMIT_MEMLOCK, &rlim); | |
488 | flags |= IOCTX_FLAG_FIXEDBUFS; | |
489 | } | |
490 | ||
491 | return syscall(__NR_sys_io_setup2, depth, flags, | |
492 | ld->sq_ring, ld->cq_ring, &ld->aio_ctx); | |
52885fa2 JA |
493 | } |
494 | ||
495 | static int fio_aioring_post_init(struct thread_data *td) | |
496 | { | |
497 | struct aioring_data *ld = td->io_ops_data; | |
498 | struct aioring_options *o = td->eo; | |
499 | struct io_u *io_u; | |
500 | struct iocb *iocb; | |
501 | int err = 0; | |
502 | ||
503 | if (o->fixedbufs) { | |
504 | int i; | |
505 | ||
506 | for (i = 0; i < td->o.iodepth; i++) { | |
507 | io_u = ld->io_u_index[i]; | |
508 | iocb = &ld->iocbs[i]; | |
509 | iocb->u.c.buf = io_u->buf; | |
510 | iocb->u.c.nbytes = td_max_bs(td); | |
511 | ||
512 | if (o->hipri) | |
513 | iocb->u.c.flags |= IOCB_FLAG_HIPRI; | |
514 | } | |
515 | } | |
516 | ||
517 | err = fio_aioring_queue_init(td); | |
d63a472d JA |
518 | |
519 | /* Adjust depth back again */ | |
520 | td->o.iodepth--; | |
521 | ||
52885fa2 | 522 | if (err) { |
d63a472d | 523 | td_verror(td, errno, "io_queue_init"); |
52885fa2 JA |
524 | return 1; |
525 | } | |
526 | ||
527 | return 0; | |
528 | } | |
529 | ||
530 | static int fio_aioring_init(struct thread_data *td) | |
531 | { | |
532 | struct aioring_data *ld; | |
533 | ||
3b617146 JA |
534 | /* ring needs an extra entry, add one to achieve QD set */ |
535 | td->o.iodepth++; | |
52885fa2 JA |
536 | |
537 | ld = calloc(1, sizeof(*ld)); | |
538 | ||
539 | /* io_u index */ | |
540 | ld->io_u_index = calloc(td->o.iodepth, sizeof(struct io_u *)); | |
541 | ld->io_us = calloc(td->o.iodepth, sizeof(struct io_u *)); | |
542 | ||
543 | ld->iocbs = fio_memalign(page_size, aioring_sq_iocb(td), false); | |
544 | memset(ld->iocbs, 0, aioring_sq_iocb(td)); | |
545 | ||
546 | ld->sq_ring = fio_memalign(page_size, aioring_sq_size(td), false); | |
547 | memset(ld->sq_ring, 0, aioring_sq_size(td)); | |
548 | ld->sq_ring->nr_events = td->o.iodepth; | |
1f90e9bb | 549 | ld->sq_ring->iocbs = (u64) (uintptr_t) ld->iocbs; |
52885fa2 JA |
550 | |
551 | ld->cq_ring = fio_memalign(page_size, aioring_cq_size(td), false); | |
552 | memset(ld->cq_ring, 0, aioring_cq_size(td)); | |
553 | ld->cq_ring->nr_events = td->o.iodepth * 2; | |
554 | ||
555 | td->io_ops_data = ld; | |
556 | return 0; | |
557 | } | |
558 | ||
559 | static int fio_aioring_io_u_init(struct thread_data *td, struct io_u *io_u) | |
560 | { | |
561 | struct aioring_data *ld = td->io_ops_data; | |
562 | ||
563 | ld->io_u_index[io_u->index] = io_u; | |
564 | return 0; | |
565 | } | |
566 | ||
567 | static struct ioengine_ops ioengine = { | |
568 | .name = "aio-ring", | |
569 | .version = FIO_IOOPS_VERSION, | |
570 | .init = fio_aioring_init, | |
571 | .post_init = fio_aioring_post_init, | |
572 | .io_u_init = fio_aioring_io_u_init, | |
573 | .prep = fio_aioring_prep, | |
574 | .queue = fio_aioring_queue, | |
575 | .commit = fio_aioring_commit, | |
576 | .getevents = fio_aioring_getevents, | |
577 | .event = fio_aioring_event, | |
578 | .cleanup = fio_aioring_cleanup, | |
579 | .open_file = generic_open_file, | |
580 | .close_file = generic_close_file, | |
581 | .get_file_size = generic_get_file_size, | |
582 | .options = options, | |
583 | .option_struct_size = sizeof(struct aioring_options), | |
584 | }; | |
585 | ||
586 | static void fio_init fio_aioring_register(void) | |
587 | { | |
52885fa2 | 588 | register_ioengine(&ioengine); |
52885fa2 JA |
589 | } |
590 | ||
591 | static void fio_exit fio_aioring_unregister(void) | |
592 | { | |
52885fa2 | 593 | unregister_ioengine(&ioengine); |
52885fa2 | 594 | } |
1f90e9bb | 595 | #endif |