Commit | Line | Data |
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a601337a AF |
1 | /* |
2 | * libblkio engine | |
3 | * | |
4 | * IO engine using libblkio to access various block I/O interfaces: | |
5 | * https://gitlab.com/libblkio/libblkio | |
6 | */ | |
7 | ||
8 | #include <assert.h> | |
9 | #include <errno.h> | |
10 | #include <stdbool.h> | |
11 | #include <stddef.h> | |
12 | #include <stdint.h> | |
13 | #include <stdlib.h> | |
14 | #include <string.h> | |
15 | ||
16 | #include <blkio.h> | |
17 | ||
18 | #include "../fio.h" | |
19 | #include "../optgroup.h" | |
20 | #include "../options.h" | |
21 | #include "../parse.h" | |
22 | ||
23 | /* per-thread state */ | |
24 | struct fio_blkio_data { | |
25 | struct blkio *b; | |
26 | struct blkioq *q; | |
b158577d | 27 | int completion_fd; /* -1 if not FIO_BLKIO_WAIT_MODE_EVENTFD */ |
a601337a AF |
28 | |
29 | bool has_mem_region; /* whether mem_region is valid */ | |
ef9b6f2f | 30 | struct blkio_mem_region mem_region; /* only if allocated by libblkio */ |
a601337a | 31 | |
6dd4291c | 32 | struct iovec *iovecs; /* for vectored requests */ |
a601337a AF |
33 | struct blkio_completion *completions; |
34 | }; | |
35 | ||
b158577d AF |
36 | enum fio_blkio_wait_mode { |
37 | FIO_BLKIO_WAIT_MODE_BLOCK, | |
38 | FIO_BLKIO_WAIT_MODE_EVENTFD, | |
39 | FIO_BLKIO_WAIT_MODE_LOOP, | |
40 | }; | |
41 | ||
a601337a AF |
42 | struct fio_blkio_options { |
43 | void *pad; /* option fields must not have offset 0 */ | |
44 | ||
45 | char *driver; | |
46 | char *pre_connect_props; | |
47 | char *pre_start_props; | |
a870d6ff AF |
48 | |
49 | unsigned int hipri; | |
6dd4291c | 50 | unsigned int vectored; |
464981ff | 51 | unsigned int write_zeroes_on_trim; |
b158577d | 52 | enum fio_blkio_wait_mode wait_mode; |
a601337a AF |
53 | }; |
54 | ||
55 | static struct fio_option options[] = { | |
56 | { | |
57 | .name = "libblkio_driver", | |
58 | .lname = "libblkio driver name", | |
59 | .type = FIO_OPT_STR_STORE, | |
60 | .off1 = offsetof(struct fio_blkio_options, driver), | |
61 | .help = "Name of the driver to be used by libblkio", | |
62 | .category = FIO_OPT_C_ENGINE, | |
63 | .group = FIO_OPT_G_LIBBLKIO, | |
64 | }, | |
65 | { | |
66 | .name = "libblkio_pre_connect_props", | |
67 | .lname = "Properties to be set before blkio_connect()", | |
68 | .type = FIO_OPT_STR_STORE, | |
69 | .off1 = offsetof(struct fio_blkio_options, pre_connect_props), | |
70 | .help = "", | |
71 | .category = FIO_OPT_C_ENGINE, | |
72 | .group = FIO_OPT_G_LIBBLKIO, | |
73 | }, | |
74 | { | |
75 | .name = "libblkio_pre_start_props", | |
76 | .lname = "Properties to be set before blkio_start()", | |
77 | .type = FIO_OPT_STR_STORE, | |
78 | .off1 = offsetof(struct fio_blkio_options, pre_start_props), | |
79 | .help = "", | |
80 | .category = FIO_OPT_C_ENGINE, | |
81 | .group = FIO_OPT_G_LIBBLKIO, | |
82 | }, | |
a870d6ff AF |
83 | { |
84 | .name = "hipri", | |
85 | .lname = "Use poll queues", | |
86 | .type = FIO_OPT_STR_SET, | |
87 | .off1 = offsetof(struct fio_blkio_options, hipri), | |
88 | .help = "Use poll queues", | |
89 | .category = FIO_OPT_C_ENGINE, | |
90 | .group = FIO_OPT_G_LIBBLKIO, | |
91 | }, | |
6dd4291c AF |
92 | { |
93 | .name = "libblkio_vectored", | |
94 | .lname = "Use blkioq_{readv,writev}()", | |
95 | .type = FIO_OPT_STR_SET, | |
96 | .off1 = offsetof(struct fio_blkio_options, vectored), | |
97 | .help = "Use blkioq_{readv,writev}() instead of blkioq_{read,write}()", | |
98 | .category = FIO_OPT_C_ENGINE, | |
99 | .group = FIO_OPT_G_LIBBLKIO, | |
100 | }, | |
464981ff AF |
101 | { |
102 | .name = "libblkio_write_zeroes_on_trim", | |
103 | .lname = "Use blkioq_write_zeroes() for TRIM", | |
104 | .type = FIO_OPT_STR_SET, | |
105 | .off1 = offsetof(struct fio_blkio_options, | |
106 | write_zeroes_on_trim), | |
107 | .help = "Use blkioq_write_zeroes() for TRIM instead of blkioq_discard()", | |
108 | .category = FIO_OPT_C_ENGINE, | |
109 | .group = FIO_OPT_G_LIBBLKIO, | |
110 | }, | |
b158577d AF |
111 | { |
112 | .name = "libblkio_wait_mode", | |
113 | .lname = "How to wait for completions", | |
114 | .type = FIO_OPT_STR, | |
115 | .off1 = offsetof(struct fio_blkio_options, wait_mode), | |
116 | .help = "How to wait for completions", | |
117 | .def = "block", | |
118 | .posval = { | |
119 | { .ival = "block", | |
120 | .oval = FIO_BLKIO_WAIT_MODE_BLOCK, | |
121 | .help = "Blocking blkioq_do_io()", | |
122 | }, | |
123 | { .ival = "eventfd", | |
124 | .oval = FIO_BLKIO_WAIT_MODE_EVENTFD, | |
125 | .help = "Blocking read() on the completion eventfd", | |
126 | }, | |
127 | { .ival = "loop", | |
128 | .oval = FIO_BLKIO_WAIT_MODE_LOOP, | |
129 | .help = "Busy loop with non-blocking blkioq_do_io()", | |
130 | }, | |
131 | }, | |
132 | .category = FIO_OPT_C_ENGINE, | |
133 | .group = FIO_OPT_G_LIBBLKIO, | |
134 | }, | |
a601337a AF |
135 | { |
136 | .name = NULL, | |
137 | }, | |
138 | }; | |
139 | ||
140 | static int fio_blkio_set_props_from_str(struct blkio *b, const char *opt_name, | |
141 | const char *str) { | |
142 | int ret = 0; | |
143 | char *new_str, *name, *value; | |
144 | ||
145 | if (!str) | |
146 | return 0; | |
147 | ||
148 | /* iteration can mutate string, so copy it */ | |
149 | new_str = strdup(str); | |
150 | if (!new_str) { | |
151 | log_err("fio: strdup() failed\n"); | |
152 | return 1; | |
153 | } | |
154 | ||
155 | /* iterate over property name-value pairs */ | |
156 | while ((name = get_next_str(&new_str))) { | |
157 | /* split into property name and value */ | |
158 | value = strchr(name, '='); | |
159 | if (!value) { | |
160 | log_err("fio: missing '=' in option %s\n", opt_name); | |
161 | ret = 1; | |
162 | break; | |
163 | } | |
164 | ||
165 | *value = '\0'; | |
166 | ++value; | |
167 | ||
168 | /* strip whitespace from property name */ | |
169 | strip_blank_front(&name); | |
170 | strip_blank_end(name); | |
171 | ||
172 | if (name[0] == '\0') { | |
173 | log_err("fio: empty property name in option %s\n", | |
174 | opt_name); | |
175 | ret = 1; | |
176 | break; | |
177 | } | |
178 | ||
179 | /* strip whitespace from property value */ | |
180 | strip_blank_front(&value); | |
181 | strip_blank_end(value); | |
182 | ||
183 | /* set property */ | |
184 | if (blkio_set_str(b, name, value) != 0) { | |
185 | log_err("fio: error setting property '%s' to '%s': %s\n", | |
186 | name, value, blkio_get_error_msg()); | |
187 | ret = 1; | |
188 | break; | |
189 | } | |
190 | } | |
191 | ||
192 | free(new_str); | |
193 | return ret; | |
194 | } | |
195 | ||
196 | /* | |
197 | * Log the failure of a libblkio function. | |
198 | * | |
199 | * `(void)func` is to ensure `func` exists and prevent typos | |
200 | */ | |
201 | #define fio_blkio_log_err(func) \ | |
202 | ({ \ | |
203 | (void)func; \ | |
204 | log_err("fio: %s() failed: %s\n", #func, \ | |
205 | blkio_get_error_msg()); \ | |
206 | }) | |
207 | ||
208 | static int fio_blkio_create_and_connect(struct thread_data *td, | |
209 | struct blkio **out_blkio) | |
210 | { | |
211 | const struct fio_blkio_options *options = td->eo; | |
212 | struct blkio *b; | |
213 | int ret; | |
214 | ||
215 | if (!options->driver) { | |
216 | log_err("fio: engine libblkio requires option libblkio_driver to be set\n"); | |
217 | return 1; | |
218 | } | |
219 | ||
220 | if (blkio_create(options->driver, &b) != 0) { | |
221 | fio_blkio_log_err(blkio_create); | |
222 | return 1; | |
223 | } | |
224 | ||
225 | /* don't fail if driver doesn't have a "direct" property */ | |
226 | ret = blkio_set_bool(b, "direct", td->o.odirect); | |
227 | if (ret != 0 && ret != -ENOENT) { | |
228 | fio_blkio_log_err(blkio_set_bool); | |
229 | goto err_blkio_destroy; | |
230 | } | |
231 | ||
232 | if (blkio_set_bool(b, "read-only", read_only) != 0) { | |
233 | fio_blkio_log_err(blkio_set_bool); | |
234 | goto err_blkio_destroy; | |
235 | } | |
236 | ||
237 | if (fio_blkio_set_props_from_str(b, "libblkio_pre_connect_props", | |
238 | options->pre_connect_props) != 0) | |
239 | goto err_blkio_destroy; | |
240 | ||
241 | if (blkio_connect(b) != 0) { | |
242 | fio_blkio_log_err(blkio_connect); | |
243 | goto err_blkio_destroy; | |
244 | } | |
245 | ||
246 | if (fio_blkio_set_props_from_str(b, "libblkio_pre_start_props", | |
247 | options->pre_start_props) != 0) | |
248 | goto err_blkio_destroy; | |
249 | ||
250 | *out_blkio = b; | |
251 | return 0; | |
252 | ||
253 | err_blkio_destroy: | |
254 | blkio_destroy(&b); | |
255 | return 1; | |
256 | } | |
257 | ||
258 | /* | |
259 | * This callback determines the device/file size, so it creates and connects a | |
260 | * blkio instance. But it is invoked from the main thread in the original fio | |
261 | * process, not from the processes in which jobs will actually run. It thus | |
262 | * subsequently destroys the blkio, which is recreated in the init() callback. | |
263 | */ | |
264 | static int fio_blkio_setup(struct thread_data *td) | |
265 | { | |
b158577d | 266 | const struct fio_blkio_options *options = td->eo; |
a601337a AF |
267 | struct blkio *b; |
268 | int ret = 0; | |
269 | uint64_t capacity; | |
270 | ||
271 | assert(td->files_index == 1); | |
272 | ||
b158577d AF |
273 | if (options->hipri && |
274 | options->wait_mode == FIO_BLKIO_WAIT_MODE_EVENTFD) { | |
275 | log_err("fio: option hipri is incompatible with option libblkio_wait_mode=eventfd\n"); | |
276 | return 1; | |
277 | } | |
278 | ||
a601337a AF |
279 | if (fio_blkio_create_and_connect(td, &b) != 0) |
280 | return 1; | |
281 | ||
282 | if (blkio_get_uint64(b, "capacity", &capacity) != 0) { | |
283 | fio_blkio_log_err(blkio_get_uint64); | |
284 | ret = 1; | |
285 | goto out_blkio_destroy; | |
286 | } | |
287 | ||
288 | td->files[0]->real_file_size = capacity; | |
289 | fio_file_set_size_known(td->files[0]); | |
290 | ||
291 | out_blkio_destroy: | |
292 | blkio_destroy(&b); | |
293 | return ret; | |
294 | } | |
295 | ||
296 | static int fio_blkio_init(struct thread_data *td) | |
297 | { | |
a870d6ff | 298 | const struct fio_blkio_options *options = td->eo; |
a601337a | 299 | struct fio_blkio_data *data; |
b158577d | 300 | int flags; |
a601337a AF |
301 | |
302 | /* | |
303 | * Request enqueueing is fast, and it's not possible to know exactly | |
304 | * when a request is submitted, so never report submission latencies. | |
305 | */ | |
306 | td->o.disable_slat = 1; | |
307 | ||
308 | data = calloc(1, sizeof(*data)); | |
309 | if (!data) { | |
310 | log_err("fio: calloc() failed\n"); | |
311 | return 1; | |
312 | } | |
313 | ||
6dd4291c | 314 | data->iovecs = calloc(td->o.iodepth, sizeof(data->iovecs[0])); |
a601337a | 315 | data->completions = calloc(td->o.iodepth, sizeof(data->completions[0])); |
6dd4291c | 316 | if (!data->iovecs || !data->completions) { |
a601337a AF |
317 | log_err("fio: calloc() failed\n"); |
318 | goto err_free; | |
319 | } | |
320 | ||
321 | if (fio_blkio_create_and_connect(td, &data->b) != 0) | |
322 | goto err_free; | |
323 | ||
a870d6ff AF |
324 | if (blkio_set_int(data->b, "num-queues", options->hipri ? 0 : 1) != 0) { |
325 | fio_blkio_log_err(blkio_set_int); | |
326 | goto err_blkio_destroy; | |
327 | } | |
328 | ||
329 | if (blkio_set_int(data->b, "num-poll-queues", | |
330 | options->hipri ? 1 : 0) != 0) { | |
a601337a AF |
331 | fio_blkio_log_err(blkio_set_int); |
332 | goto err_blkio_destroy; | |
333 | } | |
334 | ||
335 | if (blkio_start(data->b) != 0) { | |
336 | fio_blkio_log_err(blkio_start); | |
337 | goto err_blkio_destroy; | |
338 | } | |
339 | ||
a870d6ff AF |
340 | if (options->hipri) |
341 | data->q = blkio_get_poll_queue(data->b, 0); | |
342 | else | |
343 | data->q = blkio_get_queue(data->b, 0); | |
a601337a | 344 | |
b158577d AF |
345 | if (options->wait_mode == FIO_BLKIO_WAIT_MODE_EVENTFD) { |
346 | /* enable completion fd and make it blocking */ | |
347 | blkioq_set_completion_fd_enabled(data->q, true); | |
348 | data->completion_fd = blkioq_get_completion_fd(data->q); | |
349 | ||
350 | flags = fcntl(data->completion_fd, F_GETFL); | |
351 | if (flags < 0) { | |
352 | log_err("fio: fcntl(F_GETFL) failed: %s\n", | |
353 | strerror(errno)); | |
354 | goto err_blkio_destroy; | |
355 | } | |
356 | ||
357 | if (fcntl(data->completion_fd, F_SETFL, | |
358 | flags & ~O_NONBLOCK) != 0) { | |
359 | log_err("fio: fcntl(F_SETFL) failed: %s\n", | |
360 | strerror(errno)); | |
361 | goto err_blkio_destroy; | |
362 | } | |
363 | } else { | |
364 | data->completion_fd = -1; | |
365 | } | |
366 | ||
a601337a AF |
367 | /* Set data last so cleanup() does nothing if init() fails. */ |
368 | td->io_ops_data = data; | |
369 | ||
370 | return 0; | |
371 | ||
372 | err_blkio_destroy: | |
373 | blkio_destroy(&data->b); | |
374 | err_free: | |
375 | free(data->completions); | |
6dd4291c | 376 | free(data->iovecs); |
a601337a AF |
377 | free(data); |
378 | return 1; | |
379 | } | |
380 | ||
ef9b6f2f AF |
381 | static int fio_blkio_post_init(struct thread_data *td) |
382 | { | |
383 | struct fio_blkio_data *data = td->io_ops_data; | |
384 | ||
385 | if (!data->has_mem_region) { | |
386 | /* | |
387 | * Memory was allocated by the fio core and not iomem_alloc(), | |
388 | * so we need to register it as a memory region here. | |
389 | * | |
390 | * `td->orig_buffer_size` is computed like `len` below, but then | |
391 | * fio can add some padding to it to make sure it is | |
392 | * sufficiently aligned to the page size and the mem_align | |
393 | * option. However, this can make it become unaligned to the | |
394 | * "mem-region-alignment" property in ways that the user can't | |
395 | * control, so we essentially recompute `td->orig_buffer_size` | |
396 | * here but without adding that padding. | |
397 | */ | |
398 | ||
399 | unsigned long long max_block_size; | |
400 | struct blkio_mem_region region; | |
401 | ||
402 | max_block_size = max(td->o.max_bs[DDIR_READ], | |
403 | max(td->o.max_bs[DDIR_WRITE], | |
404 | td->o.max_bs[DDIR_TRIM])); | |
405 | ||
406 | region = (struct blkio_mem_region) { | |
407 | .addr = td->orig_buffer, | |
408 | .len = (size_t)max_block_size * | |
409 | (size_t)td->o.iodepth, | |
410 | .fd = -1, | |
411 | }; | |
412 | ||
413 | if (blkio_map_mem_region(data->b, ®ion) != 0) { | |
414 | fio_blkio_log_err(blkio_map_mem_region); | |
415 | return 1; | |
416 | } | |
417 | } | |
418 | ||
419 | return 0; | |
420 | } | |
421 | ||
a601337a AF |
422 | static void fio_blkio_cleanup(struct thread_data *td) |
423 | { | |
424 | struct fio_blkio_data *data = td->io_ops_data; | |
425 | ||
426 | if (data) { | |
427 | blkio_destroy(&data->b); | |
428 | free(data->completions); | |
6dd4291c | 429 | free(data->iovecs); |
a601337a AF |
430 | free(data); |
431 | } | |
432 | } | |
433 | ||
434 | #define align_up(x, y) ((((x) + (y) - 1) / (y)) * (y)) | |
435 | ||
436 | static int fio_blkio_iomem_alloc(struct thread_data *td, size_t size) | |
437 | { | |
438 | struct fio_blkio_data *data = td->io_ops_data; | |
439 | int ret; | |
440 | uint64_t mem_region_alignment; | |
441 | ||
442 | if (blkio_get_uint64(data->b, "mem-region-alignment", | |
443 | &mem_region_alignment) != 0) { | |
444 | fio_blkio_log_err(blkio_get_uint64); | |
445 | return 1; | |
446 | } | |
447 | ||
448 | /* round up size to satisfy mem-region-alignment */ | |
449 | size = align_up(size, (size_t)mem_region_alignment); | |
450 | ||
451 | if (blkio_alloc_mem_region(data->b, &data->mem_region, size) != 0) { | |
452 | fio_blkio_log_err(blkio_alloc_mem_region); | |
453 | ret = 1; | |
454 | goto out; | |
455 | } | |
456 | ||
457 | if (blkio_map_mem_region(data->b, &data->mem_region) != 0) { | |
458 | fio_blkio_log_err(blkio_map_mem_region); | |
459 | ret = 1; | |
460 | goto out_free; | |
461 | } | |
462 | ||
463 | td->orig_buffer = data->mem_region.addr; | |
464 | data->has_mem_region = true; | |
465 | ||
466 | ret = 0; | |
467 | goto out; | |
468 | ||
469 | out_free: | |
470 | blkio_free_mem_region(data->b, &data->mem_region); | |
471 | out: | |
472 | return ret; | |
473 | } | |
474 | ||
475 | static void fio_blkio_iomem_free(struct thread_data *td) | |
476 | { | |
477 | struct fio_blkio_data *data = td->io_ops_data; | |
478 | ||
479 | if (data && data->has_mem_region) { | |
480 | blkio_unmap_mem_region(data->b, &data->mem_region); | |
481 | blkio_free_mem_region(data->b, &data->mem_region); | |
482 | ||
483 | data->has_mem_region = false; | |
484 | } | |
485 | } | |
486 | ||
487 | static int fio_blkio_open_file(struct thread_data *td, struct fio_file *f) | |
488 | { | |
489 | return 0; | |
490 | } | |
491 | ||
492 | static enum fio_q_status fio_blkio_queue(struct thread_data *td, | |
493 | struct io_u *io_u) | |
494 | { | |
6dd4291c | 495 | const struct fio_blkio_options *options = td->eo; |
a601337a AF |
496 | struct fio_blkio_data *data = td->io_ops_data; |
497 | ||
498 | fio_ro_check(td, io_u); | |
499 | ||
500 | switch (io_u->ddir) { | |
501 | case DDIR_READ: | |
6dd4291c AF |
502 | if (options->vectored) { |
503 | struct iovec *iov = &data->iovecs[io_u->index]; | |
504 | iov->iov_base = io_u->xfer_buf; | |
505 | iov->iov_len = (size_t)io_u->xfer_buflen; | |
506 | ||
507 | blkioq_readv(data->q, io_u->offset, iov, 1, | |
508 | io_u, 0); | |
509 | } else { | |
510 | blkioq_read(data->q, io_u->offset, | |
511 | io_u->xfer_buf, | |
512 | (size_t)io_u->xfer_buflen, io_u, 0); | |
513 | } | |
a601337a AF |
514 | break; |
515 | case DDIR_WRITE: | |
6dd4291c AF |
516 | if (options->vectored) { |
517 | struct iovec *iov = &data->iovecs[io_u->index]; | |
518 | iov->iov_base = io_u->xfer_buf; | |
519 | iov->iov_len = (size_t)io_u->xfer_buflen; | |
520 | ||
521 | blkioq_writev(data->q, io_u->offset, iov, 1, | |
522 | io_u, 0); | |
523 | } else { | |
524 | blkioq_write(data->q, io_u->offset, | |
525 | io_u->xfer_buf, | |
526 | (size_t)io_u->xfer_buflen, io_u, | |
527 | 0); | |
528 | } | |
a601337a AF |
529 | break; |
530 | case DDIR_TRIM: | |
464981ff AF |
531 | if (options->write_zeroes_on_trim) { |
532 | blkioq_write_zeroes(data->q, io_u->offset, | |
533 | io_u->xfer_buflen, io_u, 0); | |
534 | } else { | |
535 | blkioq_discard(data->q, io_u->offset, | |
536 | io_u->xfer_buflen, io_u, 0); | |
537 | } | |
a601337a AF |
538 | break; |
539 | case DDIR_SYNC: | |
540 | case DDIR_DATASYNC: | |
541 | blkioq_flush(data->q, io_u, 0); | |
542 | break; | |
543 | default: | |
544 | io_u->error = ENOTSUP; | |
545 | io_u_log_error(td, io_u); | |
546 | return FIO_Q_COMPLETED; | |
547 | } | |
548 | ||
549 | return FIO_Q_QUEUED; | |
550 | } | |
551 | ||
552 | static int fio_blkio_getevents(struct thread_data *td, unsigned int min, | |
553 | unsigned int max, const struct timespec *t) | |
554 | { | |
b158577d | 555 | const struct fio_blkio_options *options = td->eo; |
a601337a | 556 | struct fio_blkio_data *data = td->io_ops_data; |
b158577d AF |
557 | int ret, n; |
558 | uint64_t event; | |
559 | ||
560 | switch (options->wait_mode) { | |
561 | case FIO_BLKIO_WAIT_MODE_BLOCK: | |
562 | n = blkioq_do_io(data->q, data->completions, (int)min, (int)max, | |
563 | NULL); | |
564 | if (n < 0) { | |
565 | fio_blkio_log_err(blkioq_do_io); | |
566 | return -1; | |
567 | } | |
568 | return n; | |
569 | case FIO_BLKIO_WAIT_MODE_EVENTFD: | |
570 | n = blkioq_do_io(data->q, data->completions, 0, (int)max, NULL); | |
571 | if (n < 0) { | |
572 | fio_blkio_log_err(blkioq_do_io); | |
573 | return -1; | |
574 | } | |
575 | while (n < (int)min) { | |
576 | ret = read(data->completion_fd, &event, sizeof(event)); | |
577 | if (ret != sizeof(event)) { | |
578 | log_err("fio: read() on the completion fd returned %d\n", | |
579 | ret); | |
580 | return -1; | |
581 | } | |
a601337a | 582 | |
b158577d AF |
583 | ret = blkioq_do_io(data->q, data->completions + n, 0, |
584 | (int)max - n, NULL); | |
585 | if (ret < 0) { | |
586 | fio_blkio_log_err(blkioq_do_io); | |
587 | return -1; | |
588 | } | |
589 | ||
590 | n += ret; | |
591 | } | |
592 | return n; | |
593 | case FIO_BLKIO_WAIT_MODE_LOOP: | |
594 | for (n = 0; n < (int)min; ) { | |
595 | ret = blkioq_do_io(data->q, data->completions + n, 0, | |
596 | (int)max - n, NULL); | |
597 | if (ret < 0) { | |
598 | fio_blkio_log_err(blkioq_do_io); | |
599 | return -1; | |
600 | } | |
601 | ||
602 | n += ret; | |
603 | } | |
604 | return n; | |
605 | default: | |
a601337a AF |
606 | return -1; |
607 | } | |
a601337a AF |
608 | } |
609 | ||
610 | static struct io_u *fio_blkio_event(struct thread_data *td, int event) | |
611 | { | |
612 | struct fio_blkio_data *data = td->io_ops_data; | |
613 | struct blkio_completion *completion = &data->completions[event]; | |
614 | struct io_u *io_u = completion->user_data; | |
615 | ||
616 | io_u->error = -completion->ret; | |
617 | ||
618 | return io_u; | |
619 | } | |
620 | ||
621 | FIO_STATIC struct ioengine_ops ioengine = { | |
622 | .name = "libblkio", | |
623 | .version = FIO_IOOPS_VERSION, | |
624 | .flags = FIO_DISKLESSIO | FIO_NOEXTEND | | |
ef9b6f2f | 625 | FIO_NO_OFFLOAD | FIO_SKIPPABLE_IOMEM_ALLOC, |
a601337a AF |
626 | |
627 | .setup = fio_blkio_setup, | |
628 | .init = fio_blkio_init, | |
ef9b6f2f | 629 | .post_init = fio_blkio_post_init, |
a601337a AF |
630 | .cleanup = fio_blkio_cleanup, |
631 | ||
632 | .iomem_alloc = fio_blkio_iomem_alloc, | |
633 | .iomem_free = fio_blkio_iomem_free, | |
634 | ||
635 | .open_file = fio_blkio_open_file, | |
636 | ||
637 | .queue = fio_blkio_queue, | |
638 | .getevents = fio_blkio_getevents, | |
639 | .event = fio_blkio_event, | |
640 | ||
641 | .options = options, | |
642 | .option_struct_size = sizeof(struct fio_blkio_options), | |
643 | }; | |
644 | ||
645 | static void fio_init fio_blkio_register(void) | |
646 | { | |
647 | register_ioengine(&ioengine); | |
648 | } | |
649 | ||
650 | static void fio_exit fio_blkio_unregister(void) | |
651 | { | |
652 | unregister_ioengine(&ioengine); | |
653 | } |