1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * ffs-test.c -- user mode filesystem api for usb composite function |
4 | * |
5 | * Copyright (C) 2010 Samsung Electronics |
6 | * Author: Michal Nazarewicz <mina86@mina86.com> |
7 | */ |
8 | |
9 | /* $(CROSS_COMPILE)cc -Wall -Wextra -g -o ffs-test ffs-test.c -lpthread */ |
10 | |
11 | |
12 | #define _DEFAULT_SOURCE /* for endian.h */ |
13 | |
14 | #include <endian.h> |
15 | #include <errno.h> |
16 | #include <fcntl.h> |
17 | #include <pthread.h> |
18 | #include <stdarg.h> |
19 | #include <stdbool.h> |
20 | #include <stdio.h> |
21 | #include <stdlib.h> |
22 | #include <string.h> |
23 | #include <sys/ioctl.h> |
24 | #include <sys/stat.h> |
25 | #include <sys/types.h> |
26 | #include <unistd.h> |
27 | #include <tools/le_byteshift.h> |
28 | |
29 | #include "../../include/uapi/linux/usb/functionfs.h" |
30 | |
31 | |
32 | /******************** Little Endian Handling ********************************/ |
33 | |
34 | /* |
35 | * cpu_to_le16/32 are used when initializing structures, a context where a |
36 | * function call is not allowed. To solve this, we code cpu_to_le16/32 in a way |
37 | * that allows them to be used when initializing structures. |
38 | */ |
39 | |
40 | #if __BYTE_ORDER == __LITTLE_ENDIAN |
41 | #define cpu_to_le16(x) (x) |
42 | #define cpu_to_le32(x) (x) |
43 | #else |
44 | #define cpu_to_le16(x) ((((x) >> 8) & 0xffu) | (((x) & 0xffu) << 8)) |
45 | #define cpu_to_le32(x) \ |
46 | ((((x) & 0xff000000u) >> 24) | (((x) & 0x00ff0000u) >> 8) | \ |
47 | (((x) & 0x0000ff00u) << 8) | (((x) & 0x000000ffu) << 24)) |
48 | #endif |
49 | |
50 | #define le32_to_cpu(x) le32toh(x) |
51 | #define le16_to_cpu(x) le16toh(x) |
52 | |
53 | /******************** Messages and Errors ***********************************/ |
54 | |
55 | static const char argv0[] = "ffs-test" ; |
56 | |
57 | static unsigned verbosity = 7; |
58 | |
59 | static void _msg(unsigned level, const char *fmt, ...) |
60 | { |
61 | if (level < 2) |
62 | level = 2; |
63 | else if (level > 7) |
64 | level = 7; |
65 | |
66 | if (level <= verbosity) { |
67 | static const char levels[8][6] = { |
68 | [2] = "crit:" , |
69 | [3] = "err: " , |
70 | [4] = "warn:" , |
71 | [5] = "note:" , |
72 | [6] = "info:" , |
73 | [7] = "dbg: " |
74 | }; |
75 | |
76 | int _errno = errno; |
77 | va_list ap; |
78 | |
79 | fprintf(stderr, "%s: %s " , argv0, levels[level]); |
80 | va_start(ap, fmt); |
81 | vfprintf(stderr, fmt, ap); |
82 | va_end(ap); |
83 | |
84 | if (fmt[strlen(fmt) - 1] != '\n') { |
85 | char buffer[128]; |
86 | strerror_r(_errno, buffer, sizeof buffer); |
87 | fprintf(stderr, ": (-%d) %s\n" , _errno, buffer); |
88 | } |
89 | |
90 | fflush(stderr); |
91 | } |
92 | } |
93 | |
94 | #define die(...) (_msg(2, __VA_ARGS__), exit(1)) |
95 | #define err(...) _msg(3, __VA_ARGS__) |
96 | #define warn(...) _msg(4, __VA_ARGS__) |
97 | #define note(...) _msg(5, __VA_ARGS__) |
98 | #define info(...) _msg(6, __VA_ARGS__) |
99 | #define debug(...) _msg(7, __VA_ARGS__) |
100 | |
101 | #define die_on(cond, ...) do { \ |
102 | if (cond) \ |
103 | die(__VA_ARGS__); \ |
104 | } while (0) |
105 | |
106 | |
107 | /******************** Descriptors and Strings *******************************/ |
108 | |
109 | static const struct { |
110 | struct usb_functionfs_descs_head_v2 ; |
111 | __le32 fs_count; |
112 | __le32 hs_count; |
113 | __le32 ss_count; |
114 | struct { |
115 | struct usb_interface_descriptor intf; |
116 | struct usb_endpoint_descriptor_no_audio sink; |
117 | struct usb_endpoint_descriptor_no_audio source; |
118 | } __attribute__((packed)) fs_descs, hs_descs; |
119 | struct { |
120 | struct usb_interface_descriptor intf; |
121 | struct usb_endpoint_descriptor_no_audio sink; |
122 | struct usb_ss_ep_comp_descriptor sink_comp; |
123 | struct usb_endpoint_descriptor_no_audio source; |
124 | struct usb_ss_ep_comp_descriptor source_comp; |
125 | } ss_descs; |
126 | } __attribute__((packed)) descriptors = { |
127 | .header = { |
128 | .magic = cpu_to_le32(FUNCTIONFS_DESCRIPTORS_MAGIC_V2), |
129 | .flags = cpu_to_le32(FUNCTIONFS_HAS_FS_DESC | |
130 | FUNCTIONFS_HAS_HS_DESC | |
131 | FUNCTIONFS_HAS_SS_DESC), |
132 | .length = cpu_to_le32(sizeof descriptors), |
133 | }, |
134 | .fs_count = cpu_to_le32(3), |
135 | .fs_descs = { |
136 | .intf = { |
137 | .bLength = sizeof descriptors.fs_descs.intf, |
138 | .bDescriptorType = USB_DT_INTERFACE, |
139 | .bNumEndpoints = 2, |
140 | .bInterfaceClass = USB_CLASS_VENDOR_SPEC, |
141 | .iInterface = 1, |
142 | }, |
143 | .sink = { |
144 | .bLength = sizeof descriptors.fs_descs.sink, |
145 | .bDescriptorType = USB_DT_ENDPOINT, |
146 | .bEndpointAddress = 1 | USB_DIR_IN, |
147 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
148 | /* .wMaxPacketSize = autoconfiguration (kernel) */ |
149 | }, |
150 | .source = { |
151 | .bLength = sizeof descriptors.fs_descs.source, |
152 | .bDescriptorType = USB_DT_ENDPOINT, |
153 | .bEndpointAddress = 2 | USB_DIR_OUT, |
154 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
155 | /* .wMaxPacketSize = autoconfiguration (kernel) */ |
156 | }, |
157 | }, |
158 | .hs_count = cpu_to_le32(3), |
159 | .hs_descs = { |
160 | .intf = { |
161 | .bLength = sizeof descriptors.fs_descs.intf, |
162 | .bDescriptorType = USB_DT_INTERFACE, |
163 | .bNumEndpoints = 2, |
164 | .bInterfaceClass = USB_CLASS_VENDOR_SPEC, |
165 | .iInterface = 1, |
166 | }, |
167 | .sink = { |
168 | .bLength = sizeof descriptors.hs_descs.sink, |
169 | .bDescriptorType = USB_DT_ENDPOINT, |
170 | .bEndpointAddress = 1 | USB_DIR_IN, |
171 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
172 | .wMaxPacketSize = cpu_to_le16(512), |
173 | }, |
174 | .source = { |
175 | .bLength = sizeof descriptors.hs_descs.source, |
176 | .bDescriptorType = USB_DT_ENDPOINT, |
177 | .bEndpointAddress = 2 | USB_DIR_OUT, |
178 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
179 | .wMaxPacketSize = cpu_to_le16(512), |
180 | .bInterval = 1, /* NAK every 1 uframe */ |
181 | }, |
182 | }, |
183 | .ss_count = cpu_to_le32(5), |
184 | .ss_descs = { |
185 | .intf = { |
186 | .bLength = sizeof descriptors.fs_descs.intf, |
187 | .bDescriptorType = USB_DT_INTERFACE, |
188 | .bNumEndpoints = 2, |
189 | .bInterfaceClass = USB_CLASS_VENDOR_SPEC, |
190 | .iInterface = 1, |
191 | }, |
192 | .sink = { |
193 | .bLength = sizeof descriptors.hs_descs.sink, |
194 | .bDescriptorType = USB_DT_ENDPOINT, |
195 | .bEndpointAddress = 1 | USB_DIR_IN, |
196 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
197 | .wMaxPacketSize = cpu_to_le16(1024), |
198 | }, |
199 | .sink_comp = { |
200 | .bLength = USB_DT_SS_EP_COMP_SIZE, |
201 | .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, |
202 | .bMaxBurst = 0, |
203 | .bmAttributes = 0, |
204 | .wBytesPerInterval = 0, |
205 | }, |
206 | .source = { |
207 | .bLength = sizeof descriptors.hs_descs.source, |
208 | .bDescriptorType = USB_DT_ENDPOINT, |
209 | .bEndpointAddress = 2 | USB_DIR_OUT, |
210 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
211 | .wMaxPacketSize = cpu_to_le16(1024), |
212 | .bInterval = 1, /* NAK every 1 uframe */ |
213 | }, |
214 | .source_comp = { |
215 | .bLength = USB_DT_SS_EP_COMP_SIZE, |
216 | .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, |
217 | .bMaxBurst = 0, |
218 | .bmAttributes = 0, |
219 | .wBytesPerInterval = 0, |
220 | }, |
221 | }, |
222 | }; |
223 | |
224 | static size_t descs_to_legacy(void **legacy, const void *descriptors_v2) |
225 | { |
226 | const unsigned char *descs_end, *descs_start; |
227 | __u32 length, fs_count = 0, hs_count = 0, count; |
228 | |
229 | /* Read v2 header */ |
230 | { |
231 | const struct { |
232 | const struct usb_functionfs_descs_head_v2 ; |
233 | const __le32 counts[]; |
234 | } __attribute__((packed)) *const in = descriptors_v2; |
235 | const __le32 *counts = in->counts; |
236 | __u32 flags; |
237 | |
238 | if (le32_to_cpu(in->header.magic) != |
239 | FUNCTIONFS_DESCRIPTORS_MAGIC_V2) |
240 | return 0; |
241 | length = le32_to_cpu(in->header.length); |
242 | if (length <= sizeof in->header) |
243 | return 0; |
244 | length -= sizeof in->header; |
245 | flags = le32_to_cpu(in->header.flags); |
246 | if (flags & ~(FUNCTIONFS_HAS_FS_DESC | FUNCTIONFS_HAS_HS_DESC | |
247 | FUNCTIONFS_HAS_SS_DESC)) |
248 | return 0; |
249 | |
250 | #define GET_NEXT_COUNT_IF_FLAG(ret, flg) do { \ |
251 | if (!(flags & (flg))) \ |
252 | break; \ |
253 | if (length < 4) \ |
254 | return 0; \ |
255 | ret = le32_to_cpu(*counts); \ |
256 | length -= 4; \ |
257 | ++counts; \ |
258 | } while (0) |
259 | |
260 | GET_NEXT_COUNT_IF_FLAG(fs_count, FUNCTIONFS_HAS_FS_DESC); |
261 | GET_NEXT_COUNT_IF_FLAG(hs_count, FUNCTIONFS_HAS_HS_DESC); |
262 | GET_NEXT_COUNT_IF_FLAG(count, FUNCTIONFS_HAS_SS_DESC); |
263 | |
264 | count = fs_count + hs_count; |
265 | if (!count) |
266 | return 0; |
267 | descs_start = (const void *)counts; |
268 | |
269 | #undef GET_NEXT_COUNT_IF_FLAG |
270 | } |
271 | |
272 | /* |
273 | * Find the end of FS and HS USB descriptors. SS descriptors |
274 | * are ignored since legacy format does not support them. |
275 | */ |
276 | descs_end = descs_start; |
277 | do { |
278 | if (length < *descs_end) |
279 | return 0; |
280 | length -= *descs_end; |
281 | descs_end += *descs_end; |
282 | } while (--count); |
283 | |
284 | /* Allocate legacy descriptors and copy the data. */ |
285 | { |
286 | #pragma GCC diagnostic push |
287 | #pragma GCC diagnostic ignored "-Wdeprecated-declarations" |
288 | struct { |
289 | struct usb_functionfs_descs_head ; |
290 | __u8 descriptors[]; |
291 | } __attribute__((packed)) *out; |
292 | #pragma GCC diagnostic pop |
293 | |
294 | length = sizeof out->header + (descs_end - descs_start); |
295 | out = malloc(length); |
296 | out->header.magic = cpu_to_le32(FUNCTIONFS_DESCRIPTORS_MAGIC); |
297 | out->header.length = cpu_to_le32(length); |
298 | out->header.fs_count = cpu_to_le32(fs_count); |
299 | out->header.hs_count = cpu_to_le32(hs_count); |
300 | memcpy(out->descriptors, descs_start, descs_end - descs_start); |
301 | *legacy = out; |
302 | } |
303 | |
304 | return length; |
305 | } |
306 | |
307 | |
308 | #define STR_INTERFACE_ "Source/Sink" |
309 | |
310 | static const struct { |
311 | struct usb_functionfs_strings_head ; |
312 | struct { |
313 | __le16 code; |
314 | const char str1[sizeof STR_INTERFACE_]; |
315 | } __attribute__((packed)) lang0; |
316 | } __attribute__((packed)) strings = { |
317 | .header = { |
318 | .magic = cpu_to_le32(FUNCTIONFS_STRINGS_MAGIC), |
319 | .length = cpu_to_le32(sizeof strings), |
320 | .str_count = cpu_to_le32(1), |
321 | .lang_count = cpu_to_le32(1), |
322 | }, |
323 | .lang0 = { |
324 | cpu_to_le16(0x0409), /* en-us */ |
325 | STR_INTERFACE_, |
326 | }, |
327 | }; |
328 | |
329 | #define STR_INTERFACE strings.lang0.str1 |
330 | |
331 | |
332 | /******************** Files and Threads Handling ****************************/ |
333 | |
334 | struct thread; |
335 | |
336 | static ssize_t read_wrap(struct thread *t, void *buf, size_t nbytes); |
337 | static ssize_t write_wrap(struct thread *t, const void *buf, size_t nbytes); |
338 | static ssize_t ep0_consume(struct thread *t, const void *buf, size_t nbytes); |
339 | static ssize_t fill_in_buf(struct thread *t, void *buf, size_t nbytes); |
340 | static ssize_t empty_out_buf(struct thread *t, const void *buf, size_t nbytes); |
341 | |
342 | |
343 | static struct thread { |
344 | const char *const filename; |
345 | size_t buf_size; |
346 | |
347 | ssize_t (*in)(struct thread *, void *, size_t); |
348 | const char *const in_name; |
349 | |
350 | ssize_t (*out)(struct thread *, const void *, size_t); |
351 | const char *const out_name; |
352 | |
353 | int fd; |
354 | pthread_t id; |
355 | void *buf; |
356 | ssize_t status; |
357 | } threads[] = { |
358 | { |
359 | "ep0" , 4 * sizeof(struct usb_functionfs_event), |
360 | read_wrap, NULL, |
361 | ep0_consume, "<consume>" , |
362 | 0, 0, NULL, 0 |
363 | }, |
364 | { |
365 | "ep1" , 8 * 1024, |
366 | fill_in_buf, "<in>" , |
367 | write_wrap, NULL, |
368 | 0, 0, NULL, 0 |
369 | }, |
370 | { |
371 | "ep2" , 8 * 1024, |
372 | read_wrap, NULL, |
373 | empty_out_buf, "<out>" , |
374 | 0, 0, NULL, 0 |
375 | }, |
376 | }; |
377 | |
378 | |
379 | static void init_thread(struct thread *t) |
380 | { |
381 | t->buf = malloc(t->buf_size); |
382 | die_on(!t->buf, "malloc" ); |
383 | |
384 | t->fd = open(t->filename, O_RDWR); |
385 | die_on(t->fd < 0, "%s" , t->filename); |
386 | } |
387 | |
388 | static void cleanup_thread(void *arg) |
389 | { |
390 | struct thread *t = arg; |
391 | int ret, fd; |
392 | |
393 | fd = t->fd; |
394 | if (t->fd < 0) |
395 | return; |
396 | t->fd = -1; |
397 | |
398 | /* test the FIFO ioctls (non-ep0 code paths) */ |
399 | if (t != threads) { |
400 | ret = ioctl(fd, FUNCTIONFS_FIFO_STATUS); |
401 | if (ret < 0) { |
402 | /* ENODEV reported after disconnect */ |
403 | if (errno != ENODEV) |
404 | err("%s: get fifo status" , t->filename); |
405 | } else if (ret) { |
406 | warn("%s: unclaimed = %d\n" , t->filename, ret); |
407 | if (ioctl(fd, FUNCTIONFS_FIFO_FLUSH) < 0) |
408 | err("%s: fifo flush" , t->filename); |
409 | } |
410 | } |
411 | |
412 | if (close(fd) < 0) |
413 | err("%s: close" , t->filename); |
414 | |
415 | free(t->buf); |
416 | t->buf = NULL; |
417 | } |
418 | |
419 | static void *start_thread_helper(void *arg) |
420 | { |
421 | const char *name, *op, *in_name, *out_name; |
422 | struct thread *t = arg; |
423 | ssize_t ret; |
424 | |
425 | info("%s: starts\n" , t->filename); |
426 | in_name = t->in_name ? t->in_name : t->filename; |
427 | out_name = t->out_name ? t->out_name : t->filename; |
428 | |
429 | pthread_cleanup_push(cleanup_thread, arg); |
430 | |
431 | for (;;) { |
432 | pthread_testcancel(); |
433 | |
434 | ret = t->in(t, t->buf, t->buf_size); |
435 | if (ret > 0) { |
436 | ret = t->out(t, t->buf, ret); |
437 | name = out_name; |
438 | op = "write" ; |
439 | } else { |
440 | name = in_name; |
441 | op = "read" ; |
442 | } |
443 | |
444 | if (ret > 0) { |
445 | /* nop */ |
446 | } else if (!ret) { |
447 | debug("%s: %s: EOF" , name, op); |
448 | break; |
449 | } else if (errno == EINTR || errno == EAGAIN) { |
450 | debug("%s: %s" , name, op); |
451 | } else { |
452 | warn("%s: %s" , name, op); |
453 | break; |
454 | } |
455 | } |
456 | |
457 | pthread_cleanup_pop(1); |
458 | |
459 | t->status = ret; |
460 | info("%s: ends\n" , t->filename); |
461 | return NULL; |
462 | } |
463 | |
464 | static void start_thread(struct thread *t) |
465 | { |
466 | debug("%s: starting\n" , t->filename); |
467 | |
468 | die_on(pthread_create(&t->id, NULL, start_thread_helper, t) < 0, |
469 | "pthread_create(%s)" , t->filename); |
470 | } |
471 | |
472 | static void join_thread(struct thread *t) |
473 | { |
474 | int ret = pthread_join(t->id, NULL); |
475 | |
476 | if (ret < 0) |
477 | err("%s: joining thread" , t->filename); |
478 | else |
479 | debug("%s: joined\n" , t->filename); |
480 | } |
481 | |
482 | |
483 | static ssize_t read_wrap(struct thread *t, void *buf, size_t nbytes) |
484 | { |
485 | return read(t->fd, buf, nbytes); |
486 | } |
487 | |
488 | static ssize_t write_wrap(struct thread *t, const void *buf, size_t nbytes) |
489 | { |
490 | return write(t->fd, buf, nbytes); |
491 | } |
492 | |
493 | |
494 | /******************** Empty/Fill buffer routines ****************************/ |
495 | |
496 | /* 0 -- stream of zeros, 1 -- i % 63, 2 -- pipe */ |
497 | enum pattern { PAT_ZERO, PAT_SEQ, PAT_PIPE }; |
498 | static enum pattern pattern; |
499 | |
500 | static ssize_t |
501 | fill_in_buf(struct thread *ignore, void *buf, size_t nbytes) |
502 | { |
503 | size_t i; |
504 | __u8 *p; |
505 | |
506 | (void)ignore; |
507 | |
508 | switch (pattern) { |
509 | case PAT_ZERO: |
510 | memset(buf, 0, nbytes); |
511 | break; |
512 | |
513 | case PAT_SEQ: |
514 | for (p = buf, i = 0; i < nbytes; ++i, ++p) |
515 | *p = i % 63; |
516 | break; |
517 | |
518 | case PAT_PIPE: |
519 | return fread(buf, 1, nbytes, stdin); |
520 | } |
521 | |
522 | return nbytes; |
523 | } |
524 | |
525 | static ssize_t |
526 | empty_out_buf(struct thread *ignore, const void *buf, size_t nbytes) |
527 | { |
528 | const __u8 *p; |
529 | __u8 expected; |
530 | ssize_t ret; |
531 | size_t len; |
532 | |
533 | (void)ignore; |
534 | |
535 | switch (pattern) { |
536 | case PAT_ZERO: |
537 | expected = 0; |
538 | for (p = buf, len = 0; len < nbytes; ++p, ++len) |
539 | if (*p) |
540 | goto invalid; |
541 | break; |
542 | |
543 | case PAT_SEQ: |
544 | for (p = buf, len = 0; len < nbytes; ++p, ++len) |
545 | if (*p != len % 63) { |
546 | expected = len % 63; |
547 | goto invalid; |
548 | } |
549 | break; |
550 | |
551 | case PAT_PIPE: |
552 | ret = fwrite(buf, nbytes, 1, stdout); |
553 | if (ret > 0) |
554 | fflush(stdout); |
555 | break; |
556 | |
557 | invalid: |
558 | err("bad OUT byte %zd, expected %02x got %02x\n" , |
559 | len, expected, *p); |
560 | for (p = buf, len = 0; len < nbytes; ++p, ++len) { |
561 | if (0 == (len % 32)) |
562 | fprintf(stderr, "%4zd:" , len); |
563 | fprintf(stderr, " %02x" , *p); |
564 | if (31 == (len % 32)) |
565 | fprintf(stderr, "\n" ); |
566 | } |
567 | fflush(stderr); |
568 | errno = EILSEQ; |
569 | return -1; |
570 | } |
571 | |
572 | return len; |
573 | } |
574 | |
575 | |
576 | /******************** Endpoints routines ************************************/ |
577 | |
578 | static void handle_setup(const struct usb_ctrlrequest *setup) |
579 | { |
580 | printf("bRequestType = %d\n" , setup->bRequestType); |
581 | printf("bRequest = %d\n" , setup->bRequest); |
582 | printf("wValue = %d\n" , le16_to_cpu(setup->wValue)); |
583 | printf("wIndex = %d\n" , le16_to_cpu(setup->wIndex)); |
584 | printf("wLength = %d\n" , le16_to_cpu(setup->wLength)); |
585 | } |
586 | |
587 | static ssize_t |
588 | ep0_consume(struct thread *ignore, const void *buf, size_t nbytes) |
589 | { |
590 | static const char *const names[] = { |
591 | [FUNCTIONFS_BIND] = "BIND" , |
592 | [FUNCTIONFS_UNBIND] = "UNBIND" , |
593 | [FUNCTIONFS_ENABLE] = "ENABLE" , |
594 | [FUNCTIONFS_DISABLE] = "DISABLE" , |
595 | [FUNCTIONFS_SETUP] = "SETUP" , |
596 | [FUNCTIONFS_SUSPEND] = "SUSPEND" , |
597 | [FUNCTIONFS_RESUME] = "RESUME" , |
598 | }; |
599 | |
600 | const struct usb_functionfs_event *event = buf; |
601 | size_t n; |
602 | |
603 | (void)ignore; |
604 | |
605 | for (n = nbytes / sizeof *event; n; --n, ++event) |
606 | switch (event->type) { |
607 | case FUNCTIONFS_BIND: |
608 | case FUNCTIONFS_UNBIND: |
609 | case FUNCTIONFS_ENABLE: |
610 | case FUNCTIONFS_DISABLE: |
611 | case FUNCTIONFS_SETUP: |
612 | case FUNCTIONFS_SUSPEND: |
613 | case FUNCTIONFS_RESUME: |
614 | printf("Event %s\n" , names[event->type]); |
615 | if (event->type == FUNCTIONFS_SETUP) |
616 | handle_setup(setup: &event->u.setup); |
617 | break; |
618 | |
619 | default: |
620 | printf("Event %03u (unknown)\n" , event->type); |
621 | } |
622 | |
623 | return nbytes; |
624 | } |
625 | |
626 | static void ep0_init(struct thread *t, bool legacy_descriptors) |
627 | { |
628 | void *legacy; |
629 | ssize_t ret; |
630 | size_t len; |
631 | |
632 | if (legacy_descriptors) { |
633 | info("%s: writing descriptors\n" , t->filename); |
634 | goto legacy; |
635 | } |
636 | |
637 | info("%s: writing descriptors (in v2 format)\n" , t->filename); |
638 | ret = write(t->fd, &descriptors, sizeof descriptors); |
639 | |
640 | if (ret < 0 && errno == EINVAL) { |
641 | warn("%s: new format rejected, trying legacy\n" , t->filename); |
642 | legacy: |
643 | len = descs_to_legacy(legacy: &legacy, descriptors_v2: &descriptors); |
644 | if (len) { |
645 | ret = write(t->fd, legacy, len); |
646 | free(legacy); |
647 | } |
648 | } |
649 | die_on(ret < 0, "%s: write: descriptors" , t->filename); |
650 | |
651 | info("%s: writing strings\n" , t->filename); |
652 | ret = write(t->fd, &strings, sizeof strings); |
653 | die_on(ret < 0, "%s: write: strings" , t->filename); |
654 | } |
655 | |
656 | |
657 | /******************** Main **************************************************/ |
658 | |
659 | int main(int argc, char **argv) |
660 | { |
661 | bool legacy_descriptors; |
662 | unsigned i; |
663 | |
664 | legacy_descriptors = argc > 2 && !strcmp(argv[1], "-l" ); |
665 | |
666 | init_thread(t: threads); |
667 | ep0_init(t: threads, legacy_descriptors); |
668 | |
669 | for (i = 1; i < sizeof threads / sizeof *threads; ++i) |
670 | init_thread(threads + i); |
671 | |
672 | for (i = 1; i < sizeof threads / sizeof *threads; ++i) |
673 | start_thread(threads + i); |
674 | |
675 | start_thread_helper(arg: threads); |
676 | |
677 | for (i = 1; i < sizeof threads / sizeof *threads; ++i) |
678 | join_thread(threads + i); |
679 | |
680 | return 0; |
681 | } |
682 | |