Commit | Line | Data |
---|---|---|
79a43187 JA |
1 | /* |
2 | * binject engine | |
3 | * | |
4 | * IO engine that uses the Linux binject interface to directly inject | |
5 | * bio's to block devices. | |
6 | * | |
7 | */ | |
8 | #include <stdio.h> | |
9 | #include <stdlib.h> | |
10 | #include <unistd.h> | |
11 | #include <errno.h> | |
12 | #include <assert.h> | |
13 | #include <string.h> | |
14 | #include <sys/poll.h> | |
83c107b7 JA |
15 | #include <sys/types.h> |
16 | #include <sys/stat.h> | |
79a43187 JA |
17 | |
18 | #include "../fio.h" | |
19 | ||
20 | #ifdef FIO_HAVE_BINJECT | |
21 | ||
22 | struct binject_data { | |
23 | struct b_user_cmd *cmds; | |
24 | struct io_u **events; | |
25 | struct pollfd *pfds; | |
26 | int *fd_flags; | |
79a43187 JA |
27 | }; |
28 | ||
0e238572 JA |
29 | struct binject_file { |
30 | unsigned int bs; | |
31 | int minor; | |
32 | int fd; | |
33 | }; | |
34 | ||
79a43187 JA |
35 | static void binject_buc_init(struct binject_data *bd, struct io_u *io_u) |
36 | { | |
37 | struct b_user_cmd *buc = &io_u->buc; | |
38 | ||
39 | memset(buc, 0, sizeof(*buc)); | |
40 | binject_buc_set_magic(buc); | |
41 | ||
42 | buc->buf = (unsigned long) io_u->xfer_buf; | |
43 | buc->len = io_u->xfer_buflen; | |
44 | buc->offset = io_u->offset; | |
45 | buc->usr_ptr = (unsigned long) io_u; | |
46 | ||
47 | buc->flags = B_FLAG_NOIDLE | B_FLAG_UNPLUG; | |
48 | assert(buc->buf); | |
49 | } | |
50 | ||
51 | static int pollin_events(struct pollfd *pfds, int fds) | |
52 | { | |
53 | int i; | |
54 | ||
55 | for (i = 0; i < fds; i++) | |
56 | if (pfds[i].revents & POLLIN) | |
57 | return 1; | |
58 | ||
59 | return 0; | |
60 | } | |
61 | ||
d01c404b JA |
62 | static unsigned int binject_read_commands(struct thread_data *td, void *p, |
63 | int left, int *err) | |
64 | { | |
65 | struct binject_file *bf; | |
66 | struct fio_file *f; | |
67 | int i, ret, events; | |
68 | ||
69 | one_more: | |
70 | events = 0; | |
71 | for_each_file(td, f, i) { | |
47f07ddc | 72 | bf = (struct binject_file *) (uintptr_t) f->engine_data; |
d01c404b JA |
73 | ret = read(bf->fd, p, left * sizeof(struct b_user_cmd)); |
74 | if (ret < 0) { | |
75 | if (errno == EAGAIN) | |
76 | continue; | |
77 | *err = -errno; | |
78 | td_verror(td, errno, "read"); | |
79 | break; | |
80 | } else if (ret) { | |
81 | p += ret; | |
82 | events += ret / sizeof(struct b_user_cmd); | |
83 | } | |
84 | } | |
85 | ||
86 | if (*err || events) | |
87 | return events; | |
88 | ||
89 | usleep(1000); | |
90 | goto one_more; | |
91 | } | |
92 | ||
79a43187 JA |
93 | static int fio_binject_getevents(struct thread_data *td, unsigned int min, |
94 | unsigned int max, struct timespec fio_unused *t) | |
95 | { | |
96 | struct binject_data *bd = td->io_ops->data; | |
97 | int left = max, ret, r = 0, ev_index = 0; | |
98 | void *buf = bd->cmds; | |
99 | unsigned int i, events; | |
100 | struct fio_file *f; | |
0e238572 | 101 | struct binject_file *bf; |
79a43187 JA |
102 | |
103 | /* | |
104 | * Fill in the file descriptors | |
105 | */ | |
106 | for_each_file(td, f, i) { | |
47f07ddc | 107 | bf = (struct binject_file *) (uintptr_t) f->engine_data; |
0e238572 | 108 | |
79a43187 JA |
109 | /* |
110 | * don't block for min events == 0 | |
111 | */ | |
4a851614 JA |
112 | if (!min) |
113 | fio_set_fd_nonblocking(bf->fd, "binject"); | |
114 | ||
0e238572 | 115 | bd->pfds[i].fd = bf->fd; |
79a43187 JA |
116 | bd->pfds[i].events = POLLIN; |
117 | } | |
118 | ||
119 | while (left) { | |
d01c404b | 120 | while (!min) { |
79a43187 JA |
121 | ret = poll(bd->pfds, td->o.nr_files, -1); |
122 | if (ret < 0) { | |
123 | if (!r) | |
124 | r = -errno; | |
125 | td_verror(td, errno, "poll"); | |
126 | break; | |
127 | } else if (!ret) | |
128 | continue; | |
129 | ||
130 | if (pollin_events(bd->pfds, td->o.nr_files)) | |
131 | break; | |
d01c404b | 132 | } |
79a43187 JA |
133 | |
134 | if (r < 0) | |
135 | break; | |
136 | ||
d01c404b | 137 | events = binject_read_commands(td, buf, left, &r); |
79a43187 JA |
138 | |
139 | if (r < 0) | |
140 | break; | |
79a43187 JA |
141 | |
142 | left -= events; | |
143 | r += events; | |
144 | ||
145 | for (i = 0; i < events; i++) { | |
146 | struct b_user_cmd *buc = (struct b_user_cmd *) buf + i; | |
147 | ||
2f68124f | 148 | bd->events[ev_index] = (struct io_u *) (unsigned long) buc->usr_ptr; |
79a43187 JA |
149 | ev_index++; |
150 | } | |
151 | } | |
152 | ||
153 | if (!min) { | |
0e238572 | 154 | for_each_file(td, f, i) { |
47f07ddc | 155 | bf = (struct binject_file *) (uintptr_t) f->engine_data; |
45550d71 JA |
156 | |
157 | if (fcntl(bf->fd, F_SETFL, bd->fd_flags[i]) < 0) | |
158 | log_err("fio: binject failed to restore fcntl flags: %s\n", strerror(errno)); | |
0e238572 | 159 | } |
79a43187 JA |
160 | } |
161 | ||
162 | if (r > 0) | |
163 | assert(ev_index == r); | |
164 | ||
165 | return r; | |
166 | } | |
167 | ||
168 | static int fio_binject_doio(struct thread_data *td, struct io_u *io_u) | |
169 | { | |
170 | struct b_user_cmd *buc = &io_u->buc; | |
47f07ddc | 171 | struct binject_file *bf = (struct binject_file *) (uintptr_t) io_u->file->engine_data; |
79a43187 JA |
172 | int ret; |
173 | ||
0e238572 | 174 | ret = write(bf->fd, buc, sizeof(*buc)); |
79a43187 JA |
175 | if (ret < 0) |
176 | return ret; | |
177 | ||
178 | return FIO_Q_QUEUED; | |
179 | } | |
180 | ||
181 | static int fio_binject_prep(struct thread_data *td, struct io_u *io_u) | |
182 | { | |
183 | struct binject_data *bd = td->io_ops->data; | |
184 | struct b_user_cmd *buc = &io_u->buc; | |
47f07ddc | 185 | struct binject_file *bf = (struct binject_file *) (uintptr_t) io_u->file->engine_data; |
79a43187 | 186 | |
0e238572 | 187 | if (io_u->xfer_buflen & (bf->bs - 1)) { |
79a43187 JA |
188 | log_err("read/write not sector aligned\n"); |
189 | return EINVAL; | |
190 | } | |
191 | ||
192 | if (io_u->ddir == DDIR_READ) { | |
193 | binject_buc_init(bd, io_u); | |
194 | buc->type = B_TYPE_READ; | |
195 | } else if (io_u->ddir == DDIR_WRITE) { | |
196 | binject_buc_init(bd, io_u); | |
1ef2b6be JA |
197 | if (io_u->flags & IO_U_F_BARRIER) |
198 | buc->type = B_TYPE_WRITEBARRIER; | |
199 | else | |
200 | buc->type = B_TYPE_WRITE; | |
79a43187 JA |
201 | } else if (io_u->ddir == DDIR_TRIM) { |
202 | binject_buc_init(bd, io_u); | |
203 | buc->type = B_TYPE_DISCARD; | |
204 | } else { | |
205 | assert(0); | |
206 | } | |
207 | ||
208 | return 0; | |
209 | } | |
210 | ||
211 | static int fio_binject_queue(struct thread_data *td, struct io_u *io_u) | |
212 | { | |
213 | int ret; | |
214 | ||
215 | fio_ro_check(td, io_u); | |
216 | ||
217 | ret = fio_binject_doio(td, io_u); | |
218 | ||
219 | if (ret < 0) | |
220 | io_u->error = errno; | |
221 | ||
222 | if (io_u->error) { | |
223 | td_verror(td, io_u->error, "xfer"); | |
224 | return FIO_Q_COMPLETED; | |
225 | } | |
226 | ||
227 | return ret; | |
228 | } | |
229 | ||
230 | static struct io_u *fio_binject_event(struct thread_data *td, int event) | |
231 | { | |
232 | struct binject_data *bd = td->io_ops->data; | |
233 | ||
234 | return bd->events[event]; | |
235 | } | |
236 | ||
ce4b5050 JA |
237 | static int binject_open_ctl(struct thread_data *td) |
238 | { | |
239 | int fd; | |
240 | ||
241 | fd = open("/dev/binject-ctl", O_RDWR); | |
242 | if (fd < 0) | |
243 | td_verror(td, errno, "open binject-ctl"); | |
244 | ||
245 | return fd; | |
246 | } | |
247 | ||
0e238572 JA |
248 | static void binject_unmap_dev(struct thread_data *td, struct binject_file *bf) |
249 | { | |
250 | struct b_ioctl_cmd bic; | |
251 | int fdb; | |
252 | ||
253 | if (bf->fd >= 0) { | |
254 | close(bf->fd); | |
255 | bf->fd = -1; | |
256 | } | |
257 | ||
ce4b5050 JA |
258 | fdb = binject_open_ctl(td); |
259 | if (fdb < 0) | |
0e238572 | 260 | return; |
0e238572 JA |
261 | |
262 | bic.minor = bf->minor; | |
263 | ||
f0f346d8 | 264 | if (ioctl(fdb, B_IOCTL_DEL, &bic) < 0) |
0e238572 | 265 | td_verror(td, errno, "binject dev unmap"); |
0e238572 JA |
266 | |
267 | close(fdb); | |
268 | } | |
269 | ||
270 | static int binject_map_dev(struct thread_data *td, struct binject_file *bf, | |
271 | int fd) | |
272 | { | |
273 | struct b_ioctl_cmd bic; | |
274 | char name[80]; | |
275 | struct stat sb; | |
276 | int fdb, dev_there, loops; | |
277 | ||
ce4b5050 JA |
278 | fdb = binject_open_ctl(td); |
279 | if (fdb < 0) | |
0e238572 | 280 | return 1; |
0e238572 JA |
281 | |
282 | bic.fd = fd; | |
283 | ||
f0f346d8 | 284 | if (ioctl(fdb, B_IOCTL_ADD, &bic) < 0) { |
0e238572 JA |
285 | td_verror(td, errno, "binject dev map"); |
286 | close(fdb); | |
287 | return 1; | |
288 | } | |
289 | ||
290 | bf->minor = bic.minor; | |
291 | ||
292 | sprintf(name, "/dev/binject%u", bf->minor); | |
293 | ||
294 | /* | |
295 | * Wait for udev to create the node... | |
296 | */ | |
297 | dev_there = loops = 0; | |
298 | do { | |
299 | if (!stat(name, &sb)) { | |
300 | dev_there = 1; | |
301 | break; | |
302 | } | |
303 | ||
304 | usleep(10000); | |
305 | } while (++loops < 100); | |
306 | ||
307 | close(fdb); | |
308 | ||
309 | if (!dev_there) { | |
310 | log_err("fio: timed out waiting for binject dev\n"); | |
311 | goto err_unmap; | |
312 | } | |
313 | ||
314 | bf->fd = open(name, O_RDWR); | |
315 | if (bf->fd < 0) { | |
316 | td_verror(td, errno, "binject dev open"); | |
317 | err_unmap: | |
318 | binject_unmap_dev(td, bf); | |
319 | return 1; | |
320 | } | |
321 | ||
322 | return 0; | |
323 | } | |
324 | ||
325 | static int fio_binject_close_file(struct thread_data *td, struct fio_file *f) | |
326 | { | |
47f07ddc | 327 | struct binject_file *bf = (struct binject_file *) (uintptr_t) f->engine_data; |
0e238572 JA |
328 | |
329 | if (bf) { | |
330 | binject_unmap_dev(td, bf); | |
331 | free(bf); | |
84b3842c | 332 | f->engine_data = 0; |
0e238572 JA |
333 | return generic_close_file(td, f); |
334 | } | |
335 | ||
336 | return 0; | |
337 | } | |
338 | ||
4a435dac JA |
339 | static int fio_binject_open_file(struct thread_data *td, struct fio_file *f) |
340 | { | |
0e238572 | 341 | struct binject_file *bf; |
4a435dac JA |
342 | unsigned int bs; |
343 | int ret; | |
344 | ||
345 | ret = generic_open_file(td, f); | |
346 | if (ret) | |
347 | return 1; | |
348 | ||
349 | if (f->filetype != FIO_TYPE_BD) { | |
350 | log_err("fio: binject only works with block devices\n"); | |
0e238572 | 351 | goto err_close; |
4a435dac JA |
352 | } |
353 | if (ioctl(f->fd, BLKSSZGET, &bs) < 0) { | |
354 | td_verror(td, errno, "BLKSSZGET"); | |
0e238572 JA |
355 | goto err_close; |
356 | } | |
357 | ||
358 | bf = malloc(sizeof(*bf)); | |
359 | bf->bs = bs; | |
360 | bf->minor = bf->fd = -1; | |
9cbef504 | 361 | f->engine_data = (uintptr_t) bf; |
0e238572 JA |
362 | |
363 | if (binject_map_dev(td, bf, f->fd)) { | |
364 | err_close: | |
365 | ret = generic_close_file(td, f); | |
4a435dac JA |
366 | return 1; |
367 | } | |
368 | ||
4a435dac JA |
369 | return 0; |
370 | } | |
371 | ||
79a43187 JA |
372 | static void fio_binject_cleanup(struct thread_data *td) |
373 | { | |
374 | struct binject_data *bd = td->io_ops->data; | |
375 | ||
376 | if (bd) { | |
377 | free(bd->events); | |
378 | free(bd->cmds); | |
379 | free(bd->fd_flags); | |
380 | free(bd->pfds); | |
381 | free(bd); | |
382 | } | |
383 | } | |
384 | ||
385 | static int fio_binject_init(struct thread_data *td) | |
386 | { | |
387 | struct binject_data *bd; | |
388 | ||
389 | bd = malloc(sizeof(*bd)); | |
390 | memset(bd, 0, sizeof(*bd)); | |
391 | ||
392 | bd->cmds = malloc(td->o.iodepth * sizeof(struct b_user_cmd)); | |
393 | memset(bd->cmds, 0, td->o.iodepth * sizeof(struct b_user_cmd)); | |
394 | ||
395 | bd->events = malloc(td->o.iodepth * sizeof(struct io_u *)); | |
396 | memset(bd->events, 0, td->o.iodepth * sizeof(struct io_u *)); | |
397 | ||
398 | bd->pfds = malloc(sizeof(struct pollfd) * td->o.nr_files); | |
399 | memset(bd->pfds, 0, sizeof(struct pollfd) * td->o.nr_files); | |
400 | ||
401 | bd->fd_flags = malloc(sizeof(int) * td->o.nr_files); | |
402 | memset(bd->fd_flags, 0, sizeof(int) * td->o.nr_files); | |
403 | ||
404 | td->io_ops->data = bd; | |
405 | return 0; | |
406 | } | |
407 | ||
408 | static struct ioengine_ops ioengine = { | |
409 | .name = "binject", | |
410 | .version = FIO_IOOPS_VERSION, | |
411 | .init = fio_binject_init, | |
412 | .prep = fio_binject_prep, | |
413 | .queue = fio_binject_queue, | |
414 | .getevents = fio_binject_getevents, | |
415 | .event = fio_binject_event, | |
416 | .cleanup = fio_binject_cleanup, | |
4a435dac | 417 | .open_file = fio_binject_open_file, |
0e238572 | 418 | .close_file = fio_binject_close_file, |
79a43187 | 419 | .get_file_size = generic_get_file_size, |
ca7e0ddb | 420 | .flags = FIO_RAWIO | FIO_BARRIER | FIO_MEMALIGN, |
79a43187 JA |
421 | }; |
422 | ||
423 | #else /* FIO_HAVE_BINJECT */ | |
424 | ||
425 | /* | |
426 | * When we have a proper configure system in place, we simply wont build | |
427 | * and install this io engine. For now install a crippled version that | |
428 | * just complains and fails to load. | |
429 | */ | |
430 | static int fio_binject_init(struct thread_data fio_unused *td) | |
431 | { | |
a3edaf76 | 432 | log_err("fio: ioengine binject not available\n"); |
79a43187 JA |
433 | return 1; |
434 | } | |
435 | ||
436 | static struct ioengine_ops ioengine = { | |
437 | .name = "binject", | |
438 | .version = FIO_IOOPS_VERSION, | |
439 | .init = fio_binject_init, | |
440 | }; | |
441 | ||
442 | #endif | |
443 | ||
444 | static void fio_init fio_binject_register(void) | |
445 | { | |
446 | register_ioengine(&ioengine); | |
447 | } | |
448 | ||
449 | static void fio_exit fio_binject_unregister(void) | |
450 | { | |
451 | unregister_ioengine(&ioengine); | |
452 | } |