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1 | /* | |
2 | * This work is licensed under the terms of the GNU GPL, version 2 or | |
3 | * (at your option) any later version. See the COPYING file in the | |
4 | * top-level directory. | |
5 | */ | |
6 | ||
7 | #include "qemu/osdep.h" | |
8 | #include "qapi/error.h" | |
9 | #include "qemu/config-file.h" | |
10 | #include "qemu/main-loop.h" | |
11 | #include "qemu/module.h" | |
12 | #include "qemu/sockets.h" | |
13 | #include "ui/input.h" | |
14 | #include "qom/object_interfaces.h" | |
15 | #include "sysemu/iothread.h" | |
16 | #include "block/aio.h" | |
17 | ||
18 | #include <sys/ioctl.h> | |
19 | #include "standard-headers/linux/input.h" | |
20 | #include "qom/object.h" | |
21 | ||
22 | static bool linux_is_button(unsigned int lnx) | |
23 | { | |
24 | if (lnx < 0x100) { | |
25 | return false; | |
26 | } | |
27 | if (lnx >= 0x160 && lnx < 0x2c0) { | |
28 | return false; | |
29 | } | |
30 | return true; | |
31 | } | |
32 | ||
33 | #define TYPE_INPUT_LINUX "input-linux" | |
34 | OBJECT_DECLARE_SIMPLE_TYPE(InputLinux, | |
35 | INPUT_LINUX) | |
36 | ||
37 | ||
38 | struct InputLinux { | |
39 | Object parent; | |
40 | ||
41 | char *evdev; | |
42 | int fd; | |
43 | bool repeat; | |
44 | bool grab_request; | |
45 | bool grab_active; | |
46 | bool grab_all; | |
47 | bool keydown[KEY_CNT]; | |
48 | int keycount; | |
49 | int wheel; | |
50 | bool initialized; | |
51 | ||
52 | bool has_rel_x; | |
53 | bool has_abs_x; | |
54 | int num_keys; | |
55 | int num_btns; | |
56 | int abs_x_min; | |
57 | int abs_x_max; | |
58 | int abs_y_min; | |
59 | int abs_y_max; | |
60 | struct input_event event; | |
61 | int read_offset; | |
62 | ||
63 | enum GrabToggleKeys grab_toggle; | |
64 | ||
65 | QTAILQ_ENTRY(InputLinux) next; | |
66 | }; | |
67 | ||
68 | ||
69 | static QTAILQ_HEAD(, InputLinux) inputs = QTAILQ_HEAD_INITIALIZER(inputs); | |
70 | ||
71 | static void input_linux_toggle_grab(InputLinux *il) | |
72 | { | |
73 | intptr_t request = !il->grab_active; | |
74 | InputLinux *item; | |
75 | int rc; | |
76 | ||
77 | rc = ioctl(il->fd, EVIOCGRAB, request); | |
78 | if (rc < 0) { | |
79 | return; | |
80 | } | |
81 | il->grab_active = !il->grab_active; | |
82 | ||
83 | if (!il->grab_all) { | |
84 | return; | |
85 | } | |
86 | QTAILQ_FOREACH(item, &inputs, next) { | |
87 | if (item == il || item->grab_all) { | |
88 | /* avoid endless loops */ | |
89 | continue; | |
90 | } | |
91 | if (item->grab_active != il->grab_active) { | |
92 | input_linux_toggle_grab(item); | |
93 | } | |
94 | } | |
95 | } | |
96 | ||
97 | static bool input_linux_check_toggle(InputLinux *il) | |
98 | { | |
99 | switch (il->grab_toggle) { | |
100 | case GRAB_TOGGLE_KEYS_CTRL_CTRL: | |
101 | return il->keydown[KEY_LEFTCTRL] && | |
102 | il->keydown[KEY_RIGHTCTRL]; | |
103 | ||
104 | case GRAB_TOGGLE_KEYS_ALT_ALT: | |
105 | return il->keydown[KEY_LEFTALT] && | |
106 | il->keydown[KEY_RIGHTALT]; | |
107 | ||
108 | case GRAB_TOGGLE_KEYS_SHIFT_SHIFT: | |
109 | return il->keydown[KEY_LEFTSHIFT] && | |
110 | il->keydown[KEY_RIGHTSHIFT]; | |
111 | ||
112 | case GRAB_TOGGLE_KEYS_META_META: | |
113 | return il->keydown[KEY_LEFTMETA] && | |
114 | il->keydown[KEY_RIGHTMETA]; | |
115 | ||
116 | case GRAB_TOGGLE_KEYS_SCROLLLOCK: | |
117 | return il->keydown[KEY_SCROLLLOCK]; | |
118 | ||
119 | case GRAB_TOGGLE_KEYS_CTRL_SCROLLLOCK: | |
120 | return (il->keydown[KEY_LEFTCTRL] || | |
121 | il->keydown[KEY_RIGHTCTRL]) && | |
122 | il->keydown[KEY_SCROLLLOCK]; | |
123 | ||
124 | case GRAB_TOGGLE_KEYS__MAX: | |
125 | /* avoid gcc error */ | |
126 | break; | |
127 | } | |
128 | return false; | |
129 | } | |
130 | ||
131 | static bool input_linux_should_skip(InputLinux *il, | |
132 | struct input_event *event) | |
133 | { | |
134 | return (il->grab_toggle == GRAB_TOGGLE_KEYS_SCROLLLOCK || | |
135 | il->grab_toggle == GRAB_TOGGLE_KEYS_CTRL_SCROLLLOCK) && | |
136 | event->code == KEY_SCROLLLOCK; | |
137 | } | |
138 | ||
139 | static void input_linux_handle_keyboard(InputLinux *il, | |
140 | struct input_event *event) | |
141 | { | |
142 | if (event->type == EV_KEY) { | |
143 | if (event->value > 2 || (event->value > 1 && !il->repeat)) { | |
144 | /* | |
145 | * ignore autorepeat + unknown key events | |
146 | * 0 == up, 1 == down, 2 == autorepeat, other == undefined | |
147 | */ | |
148 | return; | |
149 | } | |
150 | if (event->code >= KEY_CNT) { | |
151 | /* | |
152 | * Should not happen. But better safe than sorry, | |
153 | * and we make Coverity happy too. | |
154 | */ | |
155 | return; | |
156 | } | |
157 | ||
158 | /* keep track of key state */ | |
159 | if (!il->keydown[event->code] && event->value) { | |
160 | il->keydown[event->code] = true; | |
161 | il->keycount++; | |
162 | } | |
163 | if (il->keydown[event->code] && !event->value) { | |
164 | il->keydown[event->code] = false; | |
165 | il->keycount--; | |
166 | } | |
167 | ||
168 | /* send event to guest when grab is active */ | |
169 | if (il->grab_active && !input_linux_should_skip(il, event)) { | |
170 | int qcode = qemu_input_linux_to_qcode(event->code); | |
171 | qemu_input_event_send_key_qcode(NULL, qcode, event->value); | |
172 | } | |
173 | ||
174 | /* hotkey -> record switch request ... */ | |
175 | if (input_linux_check_toggle(il)) { | |
176 | il->grab_request = true; | |
177 | } | |
178 | ||
179 | /* | |
180 | * ... and do the switch when all keys are lifted, so we | |
181 | * confuse neither guest nor host with keys which seem to | |
182 | * be stuck due to missing key-up events. | |
183 | */ | |
184 | if (il->grab_request && !il->keycount) { | |
185 | il->grab_request = false; | |
186 | input_linux_toggle_grab(il); | |
187 | } | |
188 | } | |
189 | } | |
190 | ||
191 | static void input_linux_event_mouse_button(int button) | |
192 | { | |
193 | qemu_input_queue_btn(NULL, button, true); | |
194 | qemu_input_event_sync(); | |
195 | qemu_input_queue_btn(NULL, button, false); | |
196 | qemu_input_event_sync(); | |
197 | } | |
198 | ||
199 | static void input_linux_handle_mouse(InputLinux *il, struct input_event *event) | |
200 | { | |
201 | if (!il->grab_active) { | |
202 | return; | |
203 | } | |
204 | ||
205 | switch (event->type) { | |
206 | case EV_KEY: | |
207 | switch (event->code) { | |
208 | case BTN_LEFT: | |
209 | qemu_input_queue_btn(NULL, INPUT_BUTTON_LEFT, event->value); | |
210 | break; | |
211 | case BTN_RIGHT: | |
212 | qemu_input_queue_btn(NULL, INPUT_BUTTON_RIGHT, event->value); | |
213 | break; | |
214 | case BTN_MIDDLE: | |
215 | qemu_input_queue_btn(NULL, INPUT_BUTTON_MIDDLE, event->value); | |
216 | break; | |
217 | case BTN_GEAR_UP: | |
218 | qemu_input_queue_btn(NULL, INPUT_BUTTON_WHEEL_UP, event->value); | |
219 | break; | |
220 | case BTN_GEAR_DOWN: | |
221 | qemu_input_queue_btn(NULL, INPUT_BUTTON_WHEEL_DOWN, | |
222 | event->value); | |
223 | break; | |
224 | case BTN_SIDE: | |
225 | qemu_input_queue_btn(NULL, INPUT_BUTTON_SIDE, event->value); | |
226 | break; | |
227 | case BTN_EXTRA: | |
228 | qemu_input_queue_btn(NULL, INPUT_BUTTON_EXTRA, event->value); | |
229 | break; | |
230 | }; | |
231 | break; | |
232 | case EV_REL: | |
233 | switch (event->code) { | |
234 | case REL_X: | |
235 | qemu_input_queue_rel(NULL, INPUT_AXIS_X, event->value); | |
236 | break; | |
237 | case REL_Y: | |
238 | qemu_input_queue_rel(NULL, INPUT_AXIS_Y, event->value); | |
239 | break; | |
240 | case REL_WHEEL: | |
241 | il->wheel = event->value; | |
242 | break; | |
243 | } | |
244 | break; | |
245 | case EV_ABS: | |
246 | switch (event->code) { | |
247 | case ABS_X: | |
248 | qemu_input_queue_abs(NULL, INPUT_AXIS_X, event->value, | |
249 | il->abs_x_min, il->abs_x_max); | |
250 | break; | |
251 | case ABS_Y: | |
252 | qemu_input_queue_abs(NULL, INPUT_AXIS_Y, event->value, | |
253 | il->abs_y_min, il->abs_y_max); | |
254 | break; | |
255 | } | |
256 | break; | |
257 | case EV_SYN: | |
258 | qemu_input_event_sync(); | |
259 | if (il->wheel != 0) { | |
260 | input_linux_event_mouse_button((il->wheel > 0) | |
261 | ? INPUT_BUTTON_WHEEL_UP | |
262 | : INPUT_BUTTON_WHEEL_DOWN); | |
263 | il->wheel = 0; | |
264 | } | |
265 | break; | |
266 | } | |
267 | } | |
268 | ||
269 | static void input_linux_event(void *opaque) | |
270 | { | |
271 | InputLinux *il = opaque; | |
272 | int rc; | |
273 | int read_size; | |
274 | uint8_t *p = (uint8_t *)&il->event; | |
275 | ||
276 | for (;;) { | |
277 | read_size = sizeof(il->event) - il->read_offset; | |
278 | rc = read(il->fd, &p[il->read_offset], read_size); | |
279 | if (rc != read_size) { | |
280 | if (rc < 0 && errno != EAGAIN) { | |
281 | fprintf(stderr, "%s: read: %s\n", __func__, strerror(errno)); | |
282 | qemu_set_fd_handler(il->fd, NULL, NULL, NULL); | |
283 | close(il->fd); | |
284 | } else if (rc > 0) { | |
285 | il->read_offset += rc; | |
286 | } | |
287 | break; | |
288 | } | |
289 | il->read_offset = 0; | |
290 | ||
291 | if (il->num_keys) { | |
292 | input_linux_handle_keyboard(il, &il->event); | |
293 | } | |
294 | if ((il->has_rel_x || il->has_abs_x) && il->num_btns) { | |
295 | input_linux_handle_mouse(il, &il->event); | |
296 | } | |
297 | } | |
298 | } | |
299 | ||
300 | static void input_linux_complete(UserCreatable *uc, Error **errp) | |
301 | { | |
302 | InputLinux *il = INPUT_LINUX(uc); | |
303 | uint8_t evtmap, relmap, absmap; | |
304 | uint8_t keymap[KEY_CNT / 8], keystate[KEY_CNT / 8]; | |
305 | unsigned int i; | |
306 | int rc, ver; | |
307 | struct input_absinfo absinfo; | |
308 | ||
309 | if (!il->evdev) { | |
310 | error_setg(errp, "no input device specified"); | |
311 | return; | |
312 | } | |
313 | ||
314 | il->fd = open(il->evdev, O_RDWR); | |
315 | if (il->fd < 0) { | |
316 | error_setg_file_open(errp, errno, il->evdev); | |
317 | return; | |
318 | } | |
319 | qemu_set_nonblock(il->fd); | |
320 | ||
321 | rc = ioctl(il->fd, EVIOCGVERSION, &ver); | |
322 | if (rc < 0) { | |
323 | error_setg(errp, "%s: is not an evdev device", il->evdev); | |
324 | goto err_close; | |
325 | } | |
326 | ||
327 | rc = ioctl(il->fd, EVIOCGBIT(0, sizeof(evtmap)), &evtmap); | |
328 | if (rc < 0) { | |
329 | goto err_read_event_bits; | |
330 | } | |
331 | ||
332 | if (evtmap & (1 << EV_REL)) { | |
333 | relmap = 0; | |
334 | rc = ioctl(il->fd, EVIOCGBIT(EV_REL, sizeof(relmap)), &relmap); | |
335 | if (rc < 0) { | |
336 | goto err_read_event_bits; | |
337 | } | |
338 | if (relmap & (1 << REL_X)) { | |
339 | il->has_rel_x = true; | |
340 | } | |
341 | } | |
342 | ||
343 | if (evtmap & (1 << EV_ABS)) { | |
344 | absmap = 0; | |
345 | rc = ioctl(il->fd, EVIOCGBIT(EV_ABS, sizeof(absmap)), &absmap); | |
346 | if (rc < 0) { | |
347 | goto err_read_event_bits; | |
348 | } | |
349 | if (absmap & (1 << ABS_X)) { | |
350 | il->has_abs_x = true; | |
351 | rc = ioctl(il->fd, EVIOCGABS(ABS_X), &absinfo); | |
352 | if (rc < 0) { | |
353 | error_setg(errp, "%s: failed to get get absolute X value", | |
354 | il->evdev); | |
355 | goto err_close; | |
356 | } | |
357 | il->abs_x_min = absinfo.minimum; | |
358 | il->abs_x_max = absinfo.maximum; | |
359 | rc = ioctl(il->fd, EVIOCGABS(ABS_Y), &absinfo); | |
360 | if (rc < 0) { | |
361 | error_setg(errp, "%s: failed to get get absolute Y value", | |
362 | il->evdev); | |
363 | goto err_close; | |
364 | } | |
365 | il->abs_y_min = absinfo.minimum; | |
366 | il->abs_y_max = absinfo.maximum; | |
367 | } | |
368 | } | |
369 | ||
370 | if (evtmap & (1 << EV_KEY)) { | |
371 | memset(keymap, 0, sizeof(keymap)); | |
372 | rc = ioctl(il->fd, EVIOCGBIT(EV_KEY, sizeof(keymap)), keymap); | |
373 | if (rc < 0) { | |
374 | goto err_read_event_bits; | |
375 | } | |
376 | rc = ioctl(il->fd, EVIOCGKEY(sizeof(keystate)), keystate); | |
377 | if (rc < 0) { | |
378 | error_setg(errp, "%s: failed to get global key state", il->evdev); | |
379 | goto err_close; | |
380 | } | |
381 | for (i = 0; i < KEY_CNT; i++) { | |
382 | if (keymap[i / 8] & (1 << (i % 8))) { | |
383 | if (linux_is_button(i)) { | |
384 | il->num_btns++; | |
385 | } else { | |
386 | il->num_keys++; | |
387 | } | |
388 | if (keystate[i / 8] & (1 << (i % 8))) { | |
389 | il->keydown[i] = true; | |
390 | il->keycount++; | |
391 | } | |
392 | } | |
393 | } | |
394 | } | |
395 | ||
396 | qemu_set_fd_handler(il->fd, input_linux_event, NULL, il); | |
397 | if (il->keycount) { | |
398 | /* delay grab until all keys are released */ | |
399 | il->grab_request = true; | |
400 | } else { | |
401 | input_linux_toggle_grab(il); | |
402 | } | |
403 | QTAILQ_INSERT_TAIL(&inputs, il, next); | |
404 | il->initialized = true; | |
405 | return; | |
406 | ||
407 | err_read_event_bits: | |
408 | error_setg(errp, "%s: failed to read event bits", il->evdev); | |
409 | ||
410 | err_close: | |
411 | close(il->fd); | |
412 | return; | |
413 | } | |
414 | ||
415 | static void input_linux_instance_finalize(Object *obj) | |
416 | { | |
417 | InputLinux *il = INPUT_LINUX(obj); | |
418 | ||
419 | if (il->initialized) { | |
420 | QTAILQ_REMOVE(&inputs, il, next); | |
421 | close(il->fd); | |
422 | } | |
423 | g_free(il->evdev); | |
424 | } | |
425 | ||
426 | static char *input_linux_get_evdev(Object *obj, Error **errp) | |
427 | { | |
428 | InputLinux *il = INPUT_LINUX(obj); | |
429 | ||
430 | return g_strdup(il->evdev); | |
431 | } | |
432 | ||
433 | static void input_linux_set_evdev(Object *obj, const char *value, | |
434 | Error **errp) | |
435 | { | |
436 | InputLinux *il = INPUT_LINUX(obj); | |
437 | ||
438 | if (il->evdev) { | |
439 | error_setg(errp, "evdev property already set"); | |
440 | return; | |
441 | } | |
442 | il->evdev = g_strdup(value); | |
443 | } | |
444 | ||
445 | static bool input_linux_get_grab_all(Object *obj, Error **errp) | |
446 | { | |
447 | InputLinux *il = INPUT_LINUX(obj); | |
448 | ||
449 | return il->grab_all; | |
450 | } | |
451 | ||
452 | static void input_linux_set_grab_all(Object *obj, bool value, | |
453 | Error **errp) | |
454 | { | |
455 | InputLinux *il = INPUT_LINUX(obj); | |
456 | ||
457 | il->grab_all = value; | |
458 | } | |
459 | ||
460 | static bool input_linux_get_repeat(Object *obj, Error **errp) | |
461 | { | |
462 | InputLinux *il = INPUT_LINUX(obj); | |
463 | ||
464 | return il->repeat; | |
465 | } | |
466 | ||
467 | static void input_linux_set_repeat(Object *obj, bool value, | |
468 | Error **errp) | |
469 | { | |
470 | InputLinux *il = INPUT_LINUX(obj); | |
471 | ||
472 | il->repeat = value; | |
473 | } | |
474 | ||
475 | static int input_linux_get_grab_toggle(Object *obj, Error **errp) | |
476 | { | |
477 | InputLinux *il = INPUT_LINUX(obj); | |
478 | ||
479 | return il->grab_toggle; | |
480 | } | |
481 | ||
482 | static void input_linux_set_grab_toggle(Object *obj, int value, | |
483 | Error **errp) | |
484 | { | |
485 | InputLinux *il = INPUT_LINUX(obj); | |
486 | ||
487 | il->grab_toggle = value; | |
488 | } | |
489 | ||
490 | static void input_linux_instance_init(Object *obj) | |
491 | { | |
492 | object_property_add_str(obj, "evdev", | |
493 | input_linux_get_evdev, | |
494 | input_linux_set_evdev); | |
495 | object_property_add_bool(obj, "grab_all", | |
496 | input_linux_get_grab_all, | |
497 | input_linux_set_grab_all); | |
498 | object_property_add_bool(obj, "repeat", | |
499 | input_linux_get_repeat, | |
500 | input_linux_set_repeat); | |
501 | object_property_add_enum(obj, "grab-toggle", "GrabToggleKeys", | |
502 | &GrabToggleKeys_lookup, | |
503 | input_linux_get_grab_toggle, | |
504 | input_linux_set_grab_toggle); | |
505 | } | |
506 | ||
507 | static void input_linux_class_init(ObjectClass *oc, void *data) | |
508 | { | |
509 | UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc); | |
510 | ||
511 | ucc->complete = input_linux_complete; | |
512 | } | |
513 | ||
514 | static const TypeInfo input_linux_info = { | |
515 | .name = TYPE_INPUT_LINUX, | |
516 | .parent = TYPE_OBJECT, | |
517 | .class_init = input_linux_class_init, | |
518 | .instance_size = sizeof(InputLinux), | |
519 | .instance_init = input_linux_instance_init, | |
520 | .instance_finalize = input_linux_instance_finalize, | |
521 | .interfaces = (InterfaceInfo[]) { | |
522 | { TYPE_USER_CREATABLE }, | |
523 | { } | |
524 | } | |
525 | }; | |
526 | ||
527 | static void register_types(void) | |
528 | { | |
529 | type_register_static(&input_linux_info); | |
530 | } | |
531 | ||
532 | type_init(register_types); |