Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (C) 1992 obz under the linux copyright |
3 | * | |
4 | * Dynamic diacritical handling - aeb@cwi.nl - Dec 1993 | |
5 | * Dynamic keymap and string allocation - aeb@cwi.nl - May 1994 | |
6 | * Restrict VT switching via ioctl() - grif@cs.ucr.edu - Dec 1995 | |
7 | * Some code moved for less code duplication - Andi Kleen - Mar 1997 | |
8 | * Check put/get_user, cleanups - acme@conectiva.com.br - Jun 2001 | |
9 | */ | |
10 | ||
1da177e4 LT |
11 | #include <linux/types.h> |
12 | #include <linux/errno.h> | |
13 | #include <linux/sched.h> | |
14 | #include <linux/tty.h> | |
15 | #include <linux/timer.h> | |
16 | #include <linux/kernel.h> | |
e9216651 | 17 | #include <linux/compat.h> |
8d233558 | 18 | #include <linux/module.h> |
1da177e4 LT |
19 | #include <linux/kd.h> |
20 | #include <linux/vt.h> | |
21 | #include <linux/string.h> | |
22 | #include <linux/slab.h> | |
23 | #include <linux/major.h> | |
24 | #include <linux/fs.h> | |
25 | #include <linux/console.h> | |
04c71976 | 26 | #include <linux/consolemap.h> |
7ed20e1a | 27 | #include <linux/signal.h> |
a5e04b76 | 28 | #include <linux/suspend.h> |
bcc8ca09 | 29 | #include <linux/timex.h> |
1da177e4 LT |
30 | |
31 | #include <asm/io.h> | |
32 | #include <asm/uaccess.h> | |
33 | ||
34 | #include <linux/kbd_kern.h> | |
35 | #include <linux/vt_kern.h> | |
36 | #include <linux/kbd_diacr.h> | |
37 | #include <linux/selection.h> | |
38 | ||
b257bc05 | 39 | char vt_dont_switch; |
1da177e4 LT |
40 | extern struct tty_driver *console_driver; |
41 | ||
42 | #define VT_IS_IN_USE(i) (console_driver->ttys[i] && console_driver->ttys[i]->count) | |
43 | #define VT_BUSY(i) (VT_IS_IN_USE(i) || i == fg_console || vc_cons[i].d == sel_cons) | |
44 | ||
45 | /* | |
46 | * Console (vt and kd) routines, as defined by USL SVR4 manual, and by | |
47 | * experimentation and study of X386 SYSV handling. | |
48 | * | |
49 | * One point of difference: SYSV vt's are /dev/vtX, which X >= 0, and | |
50 | * /dev/console is a separate ttyp. Under Linux, /dev/tty0 is /dev/console, | |
51 | * and the vc start at /dev/ttyX, X >= 1. We maintain that here, so we will | |
52 | * always treat our set of vt as numbered 1..MAX_NR_CONSOLES (corresponding to | |
53 | * ttys 0..MAX_NR_CONSOLES-1). Explicitly naming VT 0 is illegal, but using | |
54 | * /dev/tty0 (fg_console) as a target is legal, since an implicit aliasing | |
55 | * to the current console is done by the main ioctl code. | |
56 | */ | |
57 | ||
58 | #ifdef CONFIG_X86 | |
59 | #include <linux/syscalls.h> | |
60 | #endif | |
61 | ||
62 | static void complete_change_console(struct vc_data *vc); | |
63 | ||
8b92e87d AC |
64 | /* |
65 | * User space VT_EVENT handlers | |
66 | */ | |
67 | ||
68 | struct vt_event_wait { | |
69 | struct list_head list; | |
70 | struct vt_event event; | |
71 | int done; | |
72 | }; | |
73 | ||
74 | static LIST_HEAD(vt_events); | |
75 | static DEFINE_SPINLOCK(vt_event_lock); | |
76 | static DECLARE_WAIT_QUEUE_HEAD(vt_event_waitqueue); | |
77 | ||
78 | /** | |
79 | * vt_event_post | |
80 | * @event: the event that occurred | |
81 | * @old: old console | |
82 | * @new: new console | |
83 | * | |
84 | * Post an VT event to interested VT handlers | |
85 | */ | |
86 | ||
87 | void vt_event_post(unsigned int event, unsigned int old, unsigned int new) | |
88 | { | |
89 | struct list_head *pos, *head; | |
90 | unsigned long flags; | |
91 | int wake = 0; | |
92 | ||
93 | spin_lock_irqsave(&vt_event_lock, flags); | |
94 | head = &vt_events; | |
95 | ||
96 | list_for_each(pos, head) { | |
97 | struct vt_event_wait *ve = list_entry(pos, | |
98 | struct vt_event_wait, list); | |
99 | if (!(ve->event.event & event)) | |
100 | continue; | |
101 | ve->event.event = event; | |
102 | /* kernel view is consoles 0..n-1, user space view is | |
103 | console 1..n with 0 meaning current, so we must bias */ | |
308efab5 AC |
104 | ve->event.oldev = old + 1; |
105 | ve->event.newev = new + 1; | |
8b92e87d AC |
106 | wake = 1; |
107 | ve->done = 1; | |
108 | } | |
109 | spin_unlock_irqrestore(&vt_event_lock, flags); | |
110 | if (wake) | |
111 | wake_up_interruptible(&vt_event_waitqueue); | |
112 | } | |
113 | ||
a7b12929 | 114 | static void __vt_event_queue(struct vt_event_wait *vw) |
8b92e87d AC |
115 | { |
116 | unsigned long flags; | |
117 | /* Prepare the event */ | |
118 | INIT_LIST_HEAD(&vw->list); | |
119 | vw->done = 0; | |
120 | /* Queue our event */ | |
121 | spin_lock_irqsave(&vt_event_lock, flags); | |
122 | list_add(&vw->list, &vt_events); | |
123 | spin_unlock_irqrestore(&vt_event_lock, flags); | |
a7b12929 RV |
124 | } |
125 | ||
126 | static void __vt_event_wait(struct vt_event_wait *vw) | |
127 | { | |
8b92e87d | 128 | /* Wait for it to pass */ |
99cceb4e | 129 | wait_event_interruptible(vt_event_waitqueue, vw->done); |
a7b12929 RV |
130 | } |
131 | ||
132 | static void __vt_event_dequeue(struct vt_event_wait *vw) | |
133 | { | |
134 | unsigned long flags; | |
135 | ||
8b92e87d AC |
136 | /* Dequeue it */ |
137 | spin_lock_irqsave(&vt_event_lock, flags); | |
138 | list_del(&vw->list); | |
139 | spin_unlock_irqrestore(&vt_event_lock, flags); | |
140 | } | |
141 | ||
a7b12929 RV |
142 | /** |
143 | * vt_event_wait - wait for an event | |
144 | * @vw: our event | |
145 | * | |
146 | * Waits for an event to occur which completes our vt_event_wait | |
147 | * structure. On return the structure has wv->done set to 1 for success | |
148 | * or 0 if some event such as a signal ended the wait. | |
149 | */ | |
150 | ||
151 | static void vt_event_wait(struct vt_event_wait *vw) | |
152 | { | |
153 | __vt_event_queue(vw); | |
154 | __vt_event_wait(vw); | |
155 | __vt_event_dequeue(vw); | |
156 | } | |
157 | ||
8b92e87d AC |
158 | /** |
159 | * vt_event_wait_ioctl - event ioctl handler | |
160 | * @arg: argument to ioctl | |
161 | * | |
162 | * Implement the VT_WAITEVENT ioctl using the VT event interface | |
163 | */ | |
164 | ||
165 | static int vt_event_wait_ioctl(struct vt_event __user *event) | |
166 | { | |
167 | struct vt_event_wait vw; | |
168 | ||
169 | if (copy_from_user(&vw.event, event, sizeof(struct vt_event))) | |
170 | return -EFAULT; | |
171 | /* Highest supported event for now */ | |
172 | if (vw.event.event & ~VT_MAX_EVENT) | |
173 | return -EINVAL; | |
174 | ||
175 | vt_event_wait(&vw); | |
176 | /* If it occurred report it */ | |
177 | if (vw.done) { | |
178 | if (copy_to_user(event, &vw.event, sizeof(struct vt_event))) | |
179 | return -EFAULT; | |
180 | return 0; | |
181 | } | |
182 | return -EINTR; | |
183 | } | |
184 | ||
185 | /** | |
186 | * vt_waitactive - active console wait | |
187 | * @event: event code | |
188 | * @n: new console | |
189 | * | |
190 | * Helper for event waits. Used to implement the legacy | |
191 | * event waiting ioctls in terms of events | |
192 | */ | |
193 | ||
194 | int vt_waitactive(int n) | |
195 | { | |
196 | struct vt_event_wait vw; | |
197 | do { | |
8b92e87d | 198 | vw.event.event = VT_EVENT_SWITCH; |
a7b12929 RV |
199 | __vt_event_queue(&vw); |
200 | if (n == fg_console + 1) { | |
201 | __vt_event_dequeue(&vw); | |
202 | break; | |
203 | } | |
204 | __vt_event_wait(&vw); | |
205 | __vt_event_dequeue(&vw); | |
8b92e87d AC |
206 | if (vw.done == 0) |
207 | return -EINTR; | |
308efab5 | 208 | } while (vw.event.newev != n); |
8b92e87d AC |
209 | return 0; |
210 | } | |
211 | ||
1da177e4 LT |
212 | /* |
213 | * these are the valid i/o ports we're allowed to change. they map all the | |
214 | * video ports | |
215 | */ | |
216 | #define GPFIRST 0x3b4 | |
217 | #define GPLAST 0x3df | |
218 | #define GPNUM (GPLAST - GPFIRST + 1) | |
219 | ||
1da177e4 | 220 | |
1da177e4 LT |
221 | |
222 | static inline int | |
223 | do_fontx_ioctl(int cmd, struct consolefontdesc __user *user_cfd, int perm, struct console_font_op *op) | |
224 | { | |
225 | struct consolefontdesc cfdarg; | |
226 | int i; | |
227 | ||
228 | if (copy_from_user(&cfdarg, user_cfd, sizeof(struct consolefontdesc))) | |
229 | return -EFAULT; | |
230 | ||
231 | switch (cmd) { | |
232 | case PIO_FONTX: | |
233 | if (!perm) | |
234 | return -EPERM; | |
235 | op->op = KD_FONT_OP_SET; | |
236 | op->flags = KD_FONT_FLAG_OLD; | |
237 | op->width = 8; | |
238 | op->height = cfdarg.charheight; | |
239 | op->charcount = cfdarg.charcount; | |
240 | op->data = cfdarg.chardata; | |
241 | return con_font_op(vc_cons[fg_console].d, op); | |
242 | case GIO_FONTX: { | |
243 | op->op = KD_FONT_OP_GET; | |
244 | op->flags = KD_FONT_FLAG_OLD; | |
245 | op->width = 8; | |
246 | op->height = cfdarg.charheight; | |
247 | op->charcount = cfdarg.charcount; | |
248 | op->data = cfdarg.chardata; | |
249 | i = con_font_op(vc_cons[fg_console].d, op); | |
250 | if (i) | |
251 | return i; | |
252 | cfdarg.charheight = op->height; | |
253 | cfdarg.charcount = op->charcount; | |
254 | if (copy_to_user(user_cfd, &cfdarg, sizeof(struct consolefontdesc))) | |
255 | return -EFAULT; | |
256 | return 0; | |
257 | } | |
258 | } | |
259 | return -EINVAL; | |
260 | } | |
261 | ||
262 | static inline int | |
263 | do_unimap_ioctl(int cmd, struct unimapdesc __user *user_ud, int perm, struct vc_data *vc) | |
264 | { | |
265 | struct unimapdesc tmp; | |
266 | ||
267 | if (copy_from_user(&tmp, user_ud, sizeof tmp)) | |
268 | return -EFAULT; | |
269 | if (tmp.entries) | |
270 | if (!access_ok(VERIFY_WRITE, tmp.entries, | |
271 | tmp.entry_ct*sizeof(struct unipair))) | |
272 | return -EFAULT; | |
273 | switch (cmd) { | |
274 | case PIO_UNIMAP: | |
275 | if (!perm) | |
276 | return -EPERM; | |
277 | return con_set_unimap(vc, tmp.entry_ct, tmp.entries); | |
278 | case GIO_UNIMAP: | |
279 | if (!perm && fg_console != vc->vc_num) | |
280 | return -EPERM; | |
281 | return con_get_unimap(vc, tmp.entry_ct, &(user_ud->entry_ct), tmp.entries); | |
282 | } | |
283 | return 0; | |
284 | } | |
285 | ||
421b40a6 PH |
286 | /* deallocate a single console, if possible (leave 0) */ |
287 | static int vt_disallocate(unsigned int vc_num) | |
288 | { | |
289 | struct vc_data *vc = NULL; | |
290 | int ret = 0; | |
291 | ||
421b40a6 PH |
292 | console_lock(); |
293 | if (VT_BUSY(vc_num)) | |
294 | ret = -EBUSY; | |
ef223fb3 | 295 | else if (vc_num) |
421b40a6 PH |
296 | vc = vc_deallocate(vc_num); |
297 | console_unlock(); | |
298 | ||
299 | if (vc && vc_num >= MIN_NR_CONSOLES) { | |
300 | tty_port_destroy(&vc->port); | |
301 | kfree(vc); | |
302 | } | |
303 | ||
304 | return ret; | |
305 | } | |
306 | ||
307 | /* deallocate all unused consoles, but leave 0 */ | |
308 | static void vt_disallocate_all(void) | |
309 | { | |
310 | struct vc_data *vc[MAX_NR_CONSOLES]; | |
311 | int i; | |
312 | ||
313 | console_lock(); | |
314 | for (i = 1; i < MAX_NR_CONSOLES; i++) | |
315 | if (!VT_BUSY(i)) | |
316 | vc[i] = vc_deallocate(i); | |
317 | else | |
318 | vc[i] = NULL; | |
319 | console_unlock(); | |
320 | ||
321 | for (i = 1; i < MAX_NR_CONSOLES; i++) { | |
322 | if (vc[i] && i >= MIN_NR_CONSOLES) { | |
323 | tty_port_destroy(&vc[i]->port); | |
324 | kfree(vc[i]); | |
325 | } | |
326 | } | |
327 | } | |
8b92e87d AC |
328 | |
329 | ||
1da177e4 LT |
330 | /* |
331 | * We handle the console-specific ioctl's here. We allow the | |
332 | * capability to modify any console, not just the fg_console. | |
333 | */ | |
6caa76b7 | 334 | int vt_ioctl(struct tty_struct *tty, |
1da177e4 LT |
335 | unsigned int cmd, unsigned long arg) |
336 | { | |
c9f19e96 | 337 | struct vc_data *vc = tty->driver_data; |
1da177e4 | 338 | struct console_font_op op; /* used in multiple places here */ |
1da177e4 LT |
339 | unsigned int console; |
340 | unsigned char ucval; | |
1e0ad288 | 341 | unsigned int uival; |
1da177e4 LT |
342 | void __user *up = (void __user *)arg; |
343 | int i, perm; | |
9cc3c22b AC |
344 | int ret = 0; |
345 | ||
1da177e4 LT |
346 | console = vc->vc_num; |
347 | ||
9cc3c22b AC |
348 | |
349 | if (!vc_cons_allocated(console)) { /* impossible? */ | |
350 | ret = -ENOIOCTLCMD; | |
351 | goto out; | |
352 | } | |
353 | ||
1da177e4 LT |
354 | |
355 | /* | |
356 | * To have permissions to do most of the vt ioctls, we either have | |
357 | * to be the owner of the tty, or have CAP_SYS_TTY_CONFIG. | |
358 | */ | |
359 | perm = 0; | |
360 | if (current->signal->tty == tty || capable(CAP_SYS_TTY_CONFIG)) | |
361 | perm = 1; | |
362 | ||
1da177e4 | 363 | switch (cmd) { |
e6885107 | 364 | case TIOCLINUX: |
a115902f JS |
365 | ret = tioclinux(tty, arg); |
366 | break; | |
1da177e4 LT |
367 | case KIOCSOUND: |
368 | if (!perm) | |
4001d7b7 | 369 | return -EPERM; |
2c4e9671 AB |
370 | /* |
371 | * The use of PIT_TICK_RATE is historic, it used to be | |
372 | * the platform-dependent CLOCK_TICK_RATE between 2.6.12 | |
373 | * and 2.6.36, which was a minor but unfortunate ABI | |
4001d7b7 | 374 | * change. kd_mksound is locked by the input layer. |
2c4e9671 | 375 | */ |
1da177e4 | 376 | if (arg) |
2c4e9671 | 377 | arg = PIT_TICK_RATE / arg; |
1da177e4 | 378 | kd_mksound(arg, 0); |
9cc3c22b | 379 | break; |
1da177e4 LT |
380 | |
381 | case KDMKTONE: | |
382 | if (!perm) | |
4001d7b7 | 383 | return -EPERM; |
1da177e4 LT |
384 | { |
385 | unsigned int ticks, count; | |
386 | ||
387 | /* | |
388 | * Generate the tone for the appropriate number of ticks. | |
389 | * If the time is zero, turn off sound ourselves. | |
390 | */ | |
391 | ticks = HZ * ((arg >> 16) & 0xffff) / 1000; | |
392 | count = ticks ? (arg & 0xffff) : 0; | |
393 | if (count) | |
2c4e9671 | 394 | count = PIT_TICK_RATE / count; |
1da177e4 | 395 | kd_mksound(count, ticks); |
9cc3c22b | 396 | break; |
1da177e4 LT |
397 | } |
398 | ||
399 | case KDGKBTYPE: | |
400 | /* | |
4001d7b7 | 401 | * this is naïve. |
1da177e4 LT |
402 | */ |
403 | ucval = KB_101; | |
079c9534 AC |
404 | ret = put_user(ucval, (char __user *)arg); |
405 | break; | |
1da177e4 LT |
406 | |
407 | /* | |
408 | * These cannot be implemented on any machine that implements | |
409 | * ioperm() in user level (such as Alpha PCs) or not at all. | |
410 | * | |
411 | * XXX: you should never use these, just call ioperm directly.. | |
412 | */ | |
413 | #ifdef CONFIG_X86 | |
414 | case KDADDIO: | |
415 | case KDDELIO: | |
416 | /* | |
417 | * KDADDIO and KDDELIO may be able to add ports beyond what | |
418 | * we reject here, but to be safe... | |
4001d7b7 AC |
419 | * |
420 | * These are locked internally via sys_ioperm | |
1da177e4 | 421 | */ |
9cc3c22b AC |
422 | if (arg < GPFIRST || arg > GPLAST) { |
423 | ret = -EINVAL; | |
424 | break; | |
425 | } | |
426 | ret = sys_ioperm(arg, 1, (cmd == KDADDIO)) ? -ENXIO : 0; | |
427 | break; | |
1da177e4 LT |
428 | |
429 | case KDENABIO: | |
430 | case KDDISABIO: | |
9cc3c22b | 431 | ret = sys_ioperm(GPFIRST, GPNUM, |
1da177e4 | 432 | (cmd == KDENABIO)) ? -ENXIO : 0; |
9cc3c22b | 433 | break; |
1da177e4 LT |
434 | #endif |
435 | ||
436 | /* Linux m68k/i386 interface for setting the keyboard delay/repeat rate */ | |
437 | ||
438 | case KDKBDREP: | |
439 | { | |
440 | struct kbd_repeat kbrep; | |
1da177e4 LT |
441 | |
442 | if (!capable(CAP_SYS_TTY_CONFIG)) | |
4001d7b7 | 443 | return -EPERM; |
1da177e4 | 444 | |
9cc3c22b AC |
445 | if (copy_from_user(&kbrep, up, sizeof(struct kbd_repeat))) { |
446 | ret = -EFAULT; | |
447 | break; | |
448 | } | |
449 | ret = kbd_rate(&kbrep); | |
450 | if (ret) | |
451 | break; | |
1da177e4 | 452 | if (copy_to_user(up, &kbrep, sizeof(struct kbd_repeat))) |
9cc3c22b AC |
453 | ret = -EFAULT; |
454 | break; | |
1da177e4 LT |
455 | } |
456 | ||
457 | case KDSETMODE: | |
458 | /* | |
459 | * currently, setting the mode from KD_TEXT to KD_GRAPHICS | |
460 | * doesn't do a whole lot. i'm not sure if it should do any | |
461 | * restoration of modes or what... | |
462 | * | |
463 | * XXX It should at least call into the driver, fbdev's definitely | |
464 | * need to restore their engine state. --BenH | |
465 | */ | |
466 | if (!perm) | |
4001d7b7 | 467 | return -EPERM; |
1da177e4 LT |
468 | switch (arg) { |
469 | case KD_GRAPHICS: | |
470 | break; | |
471 | case KD_TEXT0: | |
472 | case KD_TEXT1: | |
473 | arg = KD_TEXT; | |
474 | case KD_TEXT: | |
475 | break; | |
476 | default: | |
9cc3c22b AC |
477 | ret = -EINVAL; |
478 | goto out; | |
1da177e4 | 479 | } |
4001d7b7 | 480 | /* FIXME: this needs the console lock extending */ |
1da177e4 | 481 | if (vc->vc_mode == (unsigned char) arg) |
9cc3c22b | 482 | break; |
1da177e4 LT |
483 | vc->vc_mode = (unsigned char) arg; |
484 | if (console != fg_console) | |
9cc3c22b | 485 | break; |
1da177e4 LT |
486 | /* |
487 | * explicitly blank/unblank the screen if switching modes | |
488 | */ | |
ac751efa | 489 | console_lock(); |
1da177e4 LT |
490 | if (arg == KD_TEXT) |
491 | do_unblank_screen(1); | |
492 | else | |
493 | do_blank_screen(1); | |
ac751efa | 494 | console_unlock(); |
9cc3c22b | 495 | break; |
1da177e4 LT |
496 | |
497 | case KDGETMODE: | |
1e0ad288 | 498 | uival = vc->vc_mode; |
1da177e4 LT |
499 | goto setint; |
500 | ||
501 | case KDMAPDISP: | |
502 | case KDUNMAPDISP: | |
503 | /* | |
504 | * these work like a combination of mmap and KDENABIO. | |
505 | * this could be easily finished. | |
506 | */ | |
9cc3c22b AC |
507 | ret = -EINVAL; |
508 | break; | |
1da177e4 LT |
509 | |
510 | case KDSKBMODE: | |
511 | if (!perm) | |
4001d7b7 | 512 | return -EPERM; |
079c9534 AC |
513 | ret = vt_do_kdskbmode(console, arg); |
514 | if (ret == 0) | |
515 | tty_ldisc_flush(tty); | |
9cc3c22b | 516 | break; |
1da177e4 LT |
517 | |
518 | case KDGKBMODE: | |
079c9534 AC |
519 | uival = vt_do_kdgkbmode(console); |
520 | ret = put_user(uival, (int __user *)arg); | |
521 | break; | |
1da177e4 LT |
522 | |
523 | /* this could be folded into KDSKBMODE, but for compatibility | |
524 | reasons it is not so easy to fold KDGKBMETA into KDGKBMODE */ | |
525 | case KDSKBMETA: | |
079c9534 | 526 | ret = vt_do_kdskbmeta(console, arg); |
9cc3c22b | 527 | break; |
1da177e4 LT |
528 | |
529 | case KDGKBMETA: | |
079c9534 AC |
530 | /* FIXME: should review whether this is worth locking */ |
531 | uival = vt_do_kdgkbmeta(console); | |
1da177e4 | 532 | setint: |
1e0ad288 | 533 | ret = put_user(uival, (int __user *)arg); |
9cc3c22b | 534 | break; |
1da177e4 LT |
535 | |
536 | case KDGETKEYCODE: | |
537 | case KDSETKEYCODE: | |
538 | if(!capable(CAP_SYS_TTY_CONFIG)) | |
9cc3c22b | 539 | perm = 0; |
079c9534 | 540 | ret = vt_do_kbkeycode_ioctl(cmd, up, perm); |
9cc3c22b | 541 | break; |
1da177e4 LT |
542 | |
543 | case KDGKBENT: | |
544 | case KDSKBENT: | |
079c9534 | 545 | ret = vt_do_kdsk_ioctl(cmd, up, perm, console); |
9cc3c22b | 546 | break; |
1da177e4 LT |
547 | |
548 | case KDGKBSENT: | |
549 | case KDSKBSENT: | |
079c9534 | 550 | ret = vt_do_kdgkb_ioctl(cmd, up, perm); |
9cc3c22b | 551 | break; |
1da177e4 | 552 | |
247ff8e6 AC |
553 | /* Diacritical processing. Handled in keyboard.c as it has |
554 | to operate on the keyboard locks and structures */ | |
1da177e4 | 555 | case KDGKBDIACR: |
04c71976 | 556 | case KDGKBDIACRUC: |
1da177e4 | 557 | case KDSKBDIACR: |
04c71976 | 558 | case KDSKBDIACRUC: |
247ff8e6 | 559 | ret = vt_do_diacrit(cmd, up, perm); |
9cc3c22b | 560 | break; |
1da177e4 LT |
561 | |
562 | /* the ioctls below read/set the flags usually shown in the leds */ | |
563 | /* don't use them - they will go away without warning */ | |
564 | case KDGKBLED: | |
1da177e4 | 565 | case KDSKBLED: |
1da177e4 | 566 | case KDGETLED: |
1da177e4 | 567 | case KDSETLED: |
079c9534 | 568 | ret = vt_do_kdskled(console, cmd, arg, perm); |
9cc3c22b | 569 | break; |
1da177e4 LT |
570 | |
571 | /* | |
572 | * A process can indicate its willingness to accept signals | |
573 | * generated by pressing an appropriate key combination. | |
574 | * Thus, one can have a daemon that e.g. spawns a new console | |
575 | * upon a keypress and then changes to it. | |
576 | * See also the kbrequest field of inittab(5). | |
577 | */ | |
578 | case KDSIGACCEPT: | |
579 | { | |
1da177e4 | 580 | if (!perm || !capable(CAP_KILL)) |
4001d7b7 | 581 | return -EPERM; |
7ed20e1a | 582 | if (!valid_signal(arg) || arg < 1 || arg == SIGKILL) |
9cc3c22b AC |
583 | ret = -EINVAL; |
584 | else { | |
585 | spin_lock_irq(&vt_spawn_con.lock); | |
586 | put_pid(vt_spawn_con.pid); | |
587 | vt_spawn_con.pid = get_pid(task_pid(current)); | |
588 | vt_spawn_con.sig = arg; | |
589 | spin_unlock_irq(&vt_spawn_con.lock); | |
590 | } | |
591 | break; | |
1da177e4 LT |
592 | } |
593 | ||
594 | case VT_SETMODE: | |
595 | { | |
596 | struct vt_mode tmp; | |
597 | ||
598 | if (!perm) | |
4001d7b7 | 599 | return -EPERM; |
9cc3c22b AC |
600 | if (copy_from_user(&tmp, up, sizeof(struct vt_mode))) { |
601 | ret = -EFAULT; | |
602 | goto out; | |
603 | } | |
87a6aca5 | 604 | if (tmp.mode != VT_AUTO && tmp.mode != VT_PROCESS) { |
9cc3c22b AC |
605 | ret = -EINVAL; |
606 | goto out; | |
607 | } | |
ac751efa | 608 | console_lock(); |
1da177e4 LT |
609 | vc->vt_mode = tmp; |
610 | /* the frsig is ignored, so we set it to 0 */ | |
611 | vc->vt_mode.frsig = 0; | |
8b6312f4 EB |
612 | put_pid(vc->vt_pid); |
613 | vc->vt_pid = get_pid(task_pid(current)); | |
1da177e4 LT |
614 | /* no switch is required -- saw@shade.msu.ru */ |
615 | vc->vt_newvt = -1; | |
ac751efa | 616 | console_unlock(); |
9cc3c22b | 617 | break; |
1da177e4 LT |
618 | } |
619 | ||
620 | case VT_GETMODE: | |
621 | { | |
622 | struct vt_mode tmp; | |
623 | int rc; | |
624 | ||
ac751efa | 625 | console_lock(); |
1da177e4 | 626 | memcpy(&tmp, &vc->vt_mode, sizeof(struct vt_mode)); |
ac751efa | 627 | console_unlock(); |
1da177e4 LT |
628 | |
629 | rc = copy_to_user(up, &tmp, sizeof(struct vt_mode)); | |
9cc3c22b AC |
630 | if (rc) |
631 | ret = -EFAULT; | |
632 | break; | |
1da177e4 LT |
633 | } |
634 | ||
635 | /* | |
636 | * Returns global vt state. Note that VT 0 is always open, since | |
637 | * it's an alias for the current VT, and people can't use it here. | |
638 | * We cannot return state for more than 16 VTs, since v_state is short. | |
639 | */ | |
640 | case VT_GETSTATE: | |
641 | { | |
642 | struct vt_stat __user *vtstat = up; | |
643 | unsigned short state, mask; | |
644 | ||
4001d7b7 | 645 | /* Review: FIXME: Console lock ? */ |
1da177e4 | 646 | if (put_user(fg_console + 1, &vtstat->v_active)) |
9cc3c22b AC |
647 | ret = -EFAULT; |
648 | else { | |
649 | state = 1; /* /dev/tty0 is always open */ | |
650 | for (i = 0, mask = 2; i < MAX_NR_CONSOLES && mask; | |
651 | ++i, mask <<= 1) | |
652 | if (VT_IS_IN_USE(i)) | |
653 | state |= mask; | |
654 | ret = put_user(state, &vtstat->v_state); | |
655 | } | |
656 | break; | |
1da177e4 LT |
657 | } |
658 | ||
659 | /* | |
660 | * Returns the first available (non-opened) console. | |
661 | */ | |
662 | case VT_OPENQRY: | |
4001d7b7 | 663 | /* FIXME: locking ? - but then this is a stupid API */ |
1da177e4 LT |
664 | for (i = 0; i < MAX_NR_CONSOLES; ++i) |
665 | if (! VT_IS_IN_USE(i)) | |
666 | break; | |
1e0ad288 | 667 | uival = i < MAX_NR_CONSOLES ? (i+1) : -1; |
1da177e4 LT |
668 | goto setint; |
669 | ||
670 | /* | |
671 | * ioctl(fd, VT_ACTIVATE, num) will cause us to switch to vt # num, | |
672 | * with num >= 1 (switches to vt 0, our console, are not allowed, just | |
673 | * to preserve sanity). | |
674 | */ | |
675 | case VT_ACTIVATE: | |
676 | if (!perm) | |
4001d7b7 | 677 | return -EPERM; |
1da177e4 | 678 | if (arg == 0 || arg > MAX_NR_CONSOLES) |
9cc3c22b AC |
679 | ret = -ENXIO; |
680 | else { | |
681 | arg--; | |
ac751efa | 682 | console_lock(); |
9cc3c22b | 683 | ret = vc_allocate(arg); |
ac751efa | 684 | console_unlock(); |
9cc3c22b AC |
685 | if (ret) |
686 | break; | |
687 | set_console(arg); | |
688 | } | |
689 | break; | |
1da177e4 | 690 | |
d3b5cffc AC |
691 | case VT_SETACTIVATE: |
692 | { | |
693 | struct vt_setactivate vsa; | |
694 | ||
695 | if (!perm) | |
4001d7b7 | 696 | return -EPERM; |
d3b5cffc AC |
697 | |
698 | if (copy_from_user(&vsa, (struct vt_setactivate __user *)arg, | |
a09efb07 JS |
699 | sizeof(struct vt_setactivate))) { |
700 | ret = -EFAULT; | |
701 | goto out; | |
702 | } | |
d3b5cffc AC |
703 | if (vsa.console == 0 || vsa.console > MAX_NR_CONSOLES) |
704 | ret = -ENXIO; | |
705 | else { | |
706 | vsa.console--; | |
ac751efa | 707 | console_lock(); |
d3b5cffc AC |
708 | ret = vc_allocate(vsa.console); |
709 | if (ret == 0) { | |
710 | struct vc_data *nvc; | |
711 | /* This is safe providing we don't drop the | |
712 | console sem between vc_allocate and | |
713 | finishing referencing nvc */ | |
714 | nvc = vc_cons[vsa.console].d; | |
715 | nvc->vt_mode = vsa.mode; | |
716 | nvc->vt_mode.frsig = 0; | |
717 | put_pid(nvc->vt_pid); | |
718 | nvc->vt_pid = get_pid(task_pid(current)); | |
719 | } | |
ac751efa | 720 | console_unlock(); |
d3b5cffc AC |
721 | if (ret) |
722 | break; | |
723 | /* Commence switch and lock */ | |
4001d7b7 | 724 | /* Review set_console locks */ |
d6378375 | 725 | set_console(vsa.console); |
d3b5cffc | 726 | } |
d6378375 | 727 | break; |
d3b5cffc AC |
728 | } |
729 | ||
1da177e4 LT |
730 | /* |
731 | * wait until the specified VT has been activated | |
732 | */ | |
733 | case VT_WAITACTIVE: | |
734 | if (!perm) | |
4001d7b7 | 735 | return -EPERM; |
1da177e4 | 736 | if (arg == 0 || arg > MAX_NR_CONSOLES) |
9cc3c22b | 737 | ret = -ENXIO; |
99cceb4e | 738 | else |
8b92e87d | 739 | ret = vt_waitactive(arg); |
9cc3c22b | 740 | break; |
1da177e4 LT |
741 | |
742 | /* | |
743 | * If a vt is under process control, the kernel will not switch to it | |
744 | * immediately, but postpone the operation until the process calls this | |
745 | * ioctl, allowing the switch to complete. | |
746 | * | |
747 | * According to the X sources this is the behavior: | |
748 | * 0: pending switch-from not OK | |
749 | * 1: pending switch-from OK | |
750 | * 2: completed switch-to OK | |
751 | */ | |
752 | case VT_RELDISP: | |
753 | if (!perm) | |
4001d7b7 | 754 | return -EPERM; |
1da177e4 | 755 | |
4001d7b7 | 756 | console_lock(); |
9cc3c22b | 757 | if (vc->vt_mode.mode != VT_PROCESS) { |
4001d7b7 | 758 | console_unlock(); |
9cc3c22b AC |
759 | ret = -EINVAL; |
760 | break; | |
761 | } | |
1da177e4 LT |
762 | /* |
763 | * Switching-from response | |
764 | */ | |
765 | if (vc->vt_newvt >= 0) { | |
766 | if (arg == 0) | |
767 | /* | |
768 | * Switch disallowed, so forget we were trying | |
769 | * to do it. | |
770 | */ | |
771 | vc->vt_newvt = -1; | |
772 | ||
773 | else { | |
774 | /* | |
775 | * The current vt has been released, so | |
776 | * complete the switch. | |
777 | */ | |
778 | int newvt; | |
1da177e4 LT |
779 | newvt = vc->vt_newvt; |
780 | vc->vt_newvt = -1; | |
9cc3c22b AC |
781 | ret = vc_allocate(newvt); |
782 | if (ret) { | |
ac751efa | 783 | console_unlock(); |
9cc3c22b | 784 | break; |
1da177e4 LT |
785 | } |
786 | /* | |
787 | * When we actually do the console switch, | |
788 | * make sure we are atomic with respect to | |
789 | * other console switches.. | |
790 | */ | |
791 | complete_change_console(vc_cons[newvt].d); | |
1da177e4 | 792 | } |
9cc3c22b AC |
793 | } else { |
794 | /* | |
795 | * Switched-to response | |
796 | */ | |
1da177e4 LT |
797 | /* |
798 | * If it's just an ACK, ignore it | |
799 | */ | |
9cc3c22b AC |
800 | if (arg != VT_ACKACQ) |
801 | ret = -EINVAL; | |
1da177e4 | 802 | } |
ac751efa | 803 | console_unlock(); |
9cc3c22b | 804 | break; |
1da177e4 LT |
805 | |
806 | /* | |
807 | * Disallocate memory associated to VT (but leave VT1) | |
808 | */ | |
809 | case VT_DISALLOCATE: | |
9cc3c22b AC |
810 | if (arg > MAX_NR_CONSOLES) { |
811 | ret = -ENXIO; | |
812 | break; | |
813 | } | |
421b40a6 PH |
814 | if (arg == 0) |
815 | vt_disallocate_all(); | |
816 | else | |
817 | ret = vt_disallocate(--arg); | |
9cc3c22b | 818 | break; |
1da177e4 LT |
819 | |
820 | case VT_RESIZE: | |
821 | { | |
822 | struct vt_sizes __user *vtsizes = up; | |
e400b6ec AD |
823 | struct vc_data *vc; |
824 | ||
1da177e4 LT |
825 | ushort ll,cc; |
826 | if (!perm) | |
4001d7b7 | 827 | return -EPERM; |
1da177e4 LT |
828 | if (get_user(ll, &vtsizes->v_rows) || |
829 | get_user(cc, &vtsizes->v_cols)) | |
9cc3c22b AC |
830 | ret = -EFAULT; |
831 | else { | |
ac751efa | 832 | console_lock(); |
9cc3c22b AC |
833 | for (i = 0; i < MAX_NR_CONSOLES; i++) { |
834 | vc = vc_cons[i].d; | |
e400b6ec | 835 | |
9cc3c22b AC |
836 | if (vc) { |
837 | vc->vc_resize_user = 1; | |
4001d7b7 | 838 | /* FIXME: review v tty lock */ |
8c9a9dd0 | 839 | vc_resize(vc_cons[i].d, cc, ll); |
9cc3c22b | 840 | } |
e400b6ec | 841 | } |
ac751efa | 842 | console_unlock(); |
e400b6ec | 843 | } |
9cc3c22b | 844 | break; |
1da177e4 LT |
845 | } |
846 | ||
847 | case VT_RESIZEX: | |
848 | { | |
849 | struct vt_consize __user *vtconsize = up; | |
850 | ushort ll,cc,vlin,clin,vcol,ccol; | |
851 | if (!perm) | |
4001d7b7 | 852 | return -EPERM; |
1da177e4 | 853 | if (!access_ok(VERIFY_READ, vtconsize, |
9cc3c22b AC |
854 | sizeof(struct vt_consize))) { |
855 | ret = -EFAULT; | |
856 | break; | |
857 | } | |
858 | /* FIXME: Should check the copies properly */ | |
1da177e4 LT |
859 | __get_user(ll, &vtconsize->v_rows); |
860 | __get_user(cc, &vtconsize->v_cols); | |
861 | __get_user(vlin, &vtconsize->v_vlin); | |
862 | __get_user(clin, &vtconsize->v_clin); | |
863 | __get_user(vcol, &vtconsize->v_vcol); | |
864 | __get_user(ccol, &vtconsize->v_ccol); | |
865 | vlin = vlin ? vlin : vc->vc_scan_lines; | |
866 | if (clin) { | |
867 | if (ll) { | |
9cc3c22b AC |
868 | if (ll != vlin/clin) { |
869 | /* Parameters don't add up */ | |
870 | ret = -EINVAL; | |
871 | break; | |
872 | } | |
1da177e4 LT |
873 | } else |
874 | ll = vlin/clin; | |
875 | } | |
876 | if (vcol && ccol) { | |
877 | if (cc) { | |
9cc3c22b AC |
878 | if (cc != vcol/ccol) { |
879 | ret = -EINVAL; | |
880 | break; | |
881 | } | |
1da177e4 LT |
882 | } else |
883 | cc = vcol/ccol; | |
884 | } | |
885 | ||
9cc3c22b AC |
886 | if (clin > 32) { |
887 | ret = -EINVAL; | |
888 | break; | |
889 | } | |
1da177e4 LT |
890 | |
891 | for (i = 0; i < MAX_NR_CONSOLES; i++) { | |
892 | if (!vc_cons[i].d) | |
893 | continue; | |
ac751efa | 894 | console_lock(); |
1da177e4 LT |
895 | if (vlin) |
896 | vc_cons[i].d->vc_scan_lines = vlin; | |
897 | if (clin) | |
898 | vc_cons[i].d->vc_font.height = clin; | |
e400b6ec | 899 | vc_cons[i].d->vc_resize_user = 1; |
1da177e4 | 900 | vc_resize(vc_cons[i].d, cc, ll); |
ac751efa | 901 | console_unlock(); |
1da177e4 | 902 | } |
9cc3c22b | 903 | break; |
1da177e4 LT |
904 | } |
905 | ||
906 | case PIO_FONT: { | |
907 | if (!perm) | |
4001d7b7 | 908 | return -EPERM; |
1da177e4 LT |
909 | op.op = KD_FONT_OP_SET; |
910 | op.flags = KD_FONT_FLAG_OLD | KD_FONT_FLAG_DONT_RECALC; /* Compatibility */ | |
911 | op.width = 8; | |
912 | op.height = 0; | |
913 | op.charcount = 256; | |
914 | op.data = up; | |
9cc3c22b AC |
915 | ret = con_font_op(vc_cons[fg_console].d, &op); |
916 | break; | |
1da177e4 LT |
917 | } |
918 | ||
919 | case GIO_FONT: { | |
920 | op.op = KD_FONT_OP_GET; | |
921 | op.flags = KD_FONT_FLAG_OLD; | |
922 | op.width = 8; | |
923 | op.height = 32; | |
924 | op.charcount = 256; | |
925 | op.data = up; | |
9cc3c22b AC |
926 | ret = con_font_op(vc_cons[fg_console].d, &op); |
927 | break; | |
1da177e4 LT |
928 | } |
929 | ||
930 | case PIO_CMAP: | |
931 | if (!perm) | |
9cc3c22b AC |
932 | ret = -EPERM; |
933 | else | |
934 | ret = con_set_cmap(up); | |
935 | break; | |
1da177e4 LT |
936 | |
937 | case GIO_CMAP: | |
9cc3c22b AC |
938 | ret = con_get_cmap(up); |
939 | break; | |
1da177e4 LT |
940 | |
941 | case PIO_FONTX: | |
942 | case GIO_FONTX: | |
9cc3c22b AC |
943 | ret = do_fontx_ioctl(cmd, up, perm, &op); |
944 | break; | |
1da177e4 LT |
945 | |
946 | case PIO_FONTRESET: | |
947 | { | |
948 | if (!perm) | |
4001d7b7 | 949 | return -EPERM; |
1da177e4 LT |
950 | |
951 | #ifdef BROKEN_GRAPHICS_PROGRAMS | |
952 | /* With BROKEN_GRAPHICS_PROGRAMS defined, the default | |
953 | font is not saved. */ | |
9cc3c22b AC |
954 | ret = -ENOSYS; |
955 | break; | |
1da177e4 LT |
956 | #else |
957 | { | |
958 | op.op = KD_FONT_OP_SET_DEFAULT; | |
959 | op.data = NULL; | |
9cc3c22b AC |
960 | ret = con_font_op(vc_cons[fg_console].d, &op); |
961 | if (ret) | |
962 | break; | |
5d1a33fa | 963 | console_lock(); |
1da177e4 | 964 | con_set_default_unimap(vc_cons[fg_console].d); |
5d1a33fa | 965 | console_unlock(); |
9cc3c22b | 966 | break; |
1da177e4 LT |
967 | } |
968 | #endif | |
969 | } | |
970 | ||
971 | case KDFONTOP: { | |
9cc3c22b AC |
972 | if (copy_from_user(&op, up, sizeof(op))) { |
973 | ret = -EFAULT; | |
974 | break; | |
975 | } | |
1da177e4 | 976 | if (!perm && op.op != KD_FONT_OP_GET) |
4001d7b7 | 977 | return -EPERM; |
9cc3c22b AC |
978 | ret = con_font_op(vc, &op); |
979 | if (ret) | |
980 | break; | |
1da177e4 | 981 | if (copy_to_user(up, &op, sizeof(op))) |
9cc3c22b AC |
982 | ret = -EFAULT; |
983 | break; | |
1da177e4 LT |
984 | } |
985 | ||
986 | case PIO_SCRNMAP: | |
987 | if (!perm) | |
9cc3c22b | 988 | ret = -EPERM; |
5d1a33fa | 989 | else |
9cc3c22b AC |
990 | ret = con_set_trans_old(up); |
991 | break; | |
1da177e4 LT |
992 | |
993 | case GIO_SCRNMAP: | |
9cc3c22b AC |
994 | ret = con_get_trans_old(up); |
995 | break; | |
1da177e4 LT |
996 | |
997 | case PIO_UNISCRNMAP: | |
998 | if (!perm) | |
9cc3c22b | 999 | ret = -EPERM; |
5d1a33fa | 1000 | else |
9cc3c22b AC |
1001 | ret = con_set_trans_new(up); |
1002 | break; | |
1da177e4 LT |
1003 | |
1004 | case GIO_UNISCRNMAP: | |
9cc3c22b AC |
1005 | ret = con_get_trans_new(up); |
1006 | break; | |
1da177e4 LT |
1007 | |
1008 | case PIO_UNIMAPCLR: | |
1009 | { struct unimapinit ui; | |
1010 | if (!perm) | |
4001d7b7 | 1011 | return -EPERM; |
9cc3c22b | 1012 | ret = copy_from_user(&ui, up, sizeof(struct unimapinit)); |
3fde85df DC |
1013 | if (ret) |
1014 | ret = -EFAULT; | |
5d1a33fa | 1015 | else |
9cc3c22b AC |
1016 | con_clear_unimap(vc, &ui); |
1017 | break; | |
1da177e4 LT |
1018 | } |
1019 | ||
1020 | case PIO_UNIMAP: | |
1021 | case GIO_UNIMAP: | |
9cc3c22b AC |
1022 | ret = do_unimap_ioctl(cmd, up, perm, vc); |
1023 | break; | |
1da177e4 LT |
1024 | |
1025 | case VT_LOCKSWITCH: | |
1026 | if (!capable(CAP_SYS_TTY_CONFIG)) | |
4001d7b7 | 1027 | return -EPERM; |
1da177e4 | 1028 | vt_dont_switch = 1; |
9cc3c22b | 1029 | break; |
1da177e4 LT |
1030 | case VT_UNLOCKSWITCH: |
1031 | if (!capable(CAP_SYS_TTY_CONFIG)) | |
4001d7b7 | 1032 | return -EPERM; |
1da177e4 | 1033 | vt_dont_switch = 0; |
9cc3c22b | 1034 | break; |
533475d3 | 1035 | case VT_GETHIFONTMASK: |
9cc3c22b AC |
1036 | ret = put_user(vc->vc_hi_font_mask, |
1037 | (unsigned short __user *)arg); | |
1038 | break; | |
8b92e87d AC |
1039 | case VT_WAITEVENT: |
1040 | ret = vt_event_wait_ioctl((struct vt_event __user *)arg); | |
1041 | break; | |
1da177e4 | 1042 | default: |
9cc3c22b | 1043 | ret = -ENOIOCTLCMD; |
1da177e4 | 1044 | } |
9cc3c22b | 1045 | out: |
9cc3c22b | 1046 | return ret; |
1da177e4 LT |
1047 | } |
1048 | ||
1da177e4 LT |
1049 | void reset_vc(struct vc_data *vc) |
1050 | { | |
1051 | vc->vc_mode = KD_TEXT; | |
079c9534 | 1052 | vt_reset_unicode(vc->vc_num); |
1da177e4 LT |
1053 | vc->vt_mode.mode = VT_AUTO; |
1054 | vc->vt_mode.waitv = 0; | |
1055 | vc->vt_mode.relsig = 0; | |
1056 | vc->vt_mode.acqsig = 0; | |
1057 | vc->vt_mode.frsig = 0; | |
8b6312f4 EB |
1058 | put_pid(vc->vt_pid); |
1059 | vc->vt_pid = NULL; | |
1da177e4 LT |
1060 | vc->vt_newvt = -1; |
1061 | if (!in_interrupt()) /* Via keyboard.c:SAK() - akpm */ | |
1062 | reset_palette(vc); | |
1063 | } | |
1064 | ||
8b6312f4 EB |
1065 | void vc_SAK(struct work_struct *work) |
1066 | { | |
1067 | struct vc *vc_con = | |
1068 | container_of(work, struct vc, SAK_work); | |
1069 | struct vc_data *vc; | |
1070 | struct tty_struct *tty; | |
1071 | ||
ac751efa | 1072 | console_lock(); |
8b6312f4 EB |
1073 | vc = vc_con->d; |
1074 | if (vc) { | |
079c9534 | 1075 | /* FIXME: review tty ref counting */ |
8ce73264 | 1076 | tty = vc->port.tty; |
8b6312f4 EB |
1077 | /* |
1078 | * SAK should also work in all raw modes and reset | |
1079 | * them properly. | |
1080 | */ | |
1081 | if (tty) | |
1082 | __do_SAK(tty); | |
1083 | reset_vc(vc); | |
1084 | } | |
ac751efa | 1085 | console_unlock(); |
8b6312f4 EB |
1086 | } |
1087 | ||
e9216651 AB |
1088 | #ifdef CONFIG_COMPAT |
1089 | ||
1090 | struct compat_consolefontdesc { | |
1091 | unsigned short charcount; /* characters in font (256 or 512) */ | |
1092 | unsigned short charheight; /* scan lines per character (1-32) */ | |
1093 | compat_caddr_t chardata; /* font data in expanded form */ | |
1094 | }; | |
1095 | ||
1096 | static inline int | |
1097 | compat_fontx_ioctl(int cmd, struct compat_consolefontdesc __user *user_cfd, | |
1098 | int perm, struct console_font_op *op) | |
1099 | { | |
1100 | struct compat_consolefontdesc cfdarg; | |
1101 | int i; | |
1102 | ||
1103 | if (copy_from_user(&cfdarg, user_cfd, sizeof(struct compat_consolefontdesc))) | |
1104 | return -EFAULT; | |
1105 | ||
1106 | switch (cmd) { | |
1107 | case PIO_FONTX: | |
1108 | if (!perm) | |
1109 | return -EPERM; | |
1110 | op->op = KD_FONT_OP_SET; | |
1111 | op->flags = KD_FONT_FLAG_OLD; | |
1112 | op->width = 8; | |
1113 | op->height = cfdarg.charheight; | |
1114 | op->charcount = cfdarg.charcount; | |
1115 | op->data = compat_ptr(cfdarg.chardata); | |
1116 | return con_font_op(vc_cons[fg_console].d, op); | |
1117 | case GIO_FONTX: | |
1118 | op->op = KD_FONT_OP_GET; | |
1119 | op->flags = KD_FONT_FLAG_OLD; | |
1120 | op->width = 8; | |
1121 | op->height = cfdarg.charheight; | |
1122 | op->charcount = cfdarg.charcount; | |
1123 | op->data = compat_ptr(cfdarg.chardata); | |
1124 | i = con_font_op(vc_cons[fg_console].d, op); | |
1125 | if (i) | |
1126 | return i; | |
1127 | cfdarg.charheight = op->height; | |
1128 | cfdarg.charcount = op->charcount; | |
1129 | if (copy_to_user(user_cfd, &cfdarg, sizeof(struct compat_consolefontdesc))) | |
1130 | return -EFAULT; | |
1131 | return 0; | |
1132 | } | |
1133 | return -EINVAL; | |
1134 | } | |
1135 | ||
1136 | struct compat_console_font_op { | |
1137 | compat_uint_t op; /* operation code KD_FONT_OP_* */ | |
1138 | compat_uint_t flags; /* KD_FONT_FLAG_* */ | |
1139 | compat_uint_t width, height; /* font size */ | |
1140 | compat_uint_t charcount; | |
1141 | compat_caddr_t data; /* font data with height fixed to 32 */ | |
1142 | }; | |
1143 | ||
1144 | static inline int | |
1145 | compat_kdfontop_ioctl(struct compat_console_font_op __user *fontop, | |
1146 | int perm, struct console_font_op *op, struct vc_data *vc) | |
1147 | { | |
1148 | int i; | |
1149 | ||
1150 | if (copy_from_user(op, fontop, sizeof(struct compat_console_font_op))) | |
1151 | return -EFAULT; | |
1152 | if (!perm && op->op != KD_FONT_OP_GET) | |
1153 | return -EPERM; | |
1154 | op->data = compat_ptr(((struct compat_console_font_op *)op)->data); | |
e9216651 AB |
1155 | i = con_font_op(vc, op); |
1156 | if (i) | |
1157 | return i; | |
1158 | ((struct compat_console_font_op *)op)->data = (unsigned long)op->data; | |
1159 | if (copy_to_user(fontop, op, sizeof(struct compat_console_font_op))) | |
1160 | return -EFAULT; | |
1161 | return 0; | |
1162 | } | |
1163 | ||
1164 | struct compat_unimapdesc { | |
1165 | unsigned short entry_ct; | |
1166 | compat_caddr_t entries; | |
1167 | }; | |
1168 | ||
1169 | static inline int | |
1170 | compat_unimap_ioctl(unsigned int cmd, struct compat_unimapdesc __user *user_ud, | |
1171 | int perm, struct vc_data *vc) | |
1172 | { | |
1173 | struct compat_unimapdesc tmp; | |
1174 | struct unipair __user *tmp_entries; | |
1175 | ||
1176 | if (copy_from_user(&tmp, user_ud, sizeof tmp)) | |
1177 | return -EFAULT; | |
1178 | tmp_entries = compat_ptr(tmp.entries); | |
1179 | if (tmp_entries) | |
1180 | if (!access_ok(VERIFY_WRITE, tmp_entries, | |
1181 | tmp.entry_ct*sizeof(struct unipair))) | |
1182 | return -EFAULT; | |
1183 | switch (cmd) { | |
1184 | case PIO_UNIMAP: | |
1185 | if (!perm) | |
1186 | return -EPERM; | |
1187 | return con_set_unimap(vc, tmp.entry_ct, tmp_entries); | |
1188 | case GIO_UNIMAP: | |
1189 | if (!perm && fg_console != vc->vc_num) | |
1190 | return -EPERM; | |
1191 | return con_get_unimap(vc, tmp.entry_ct, &(user_ud->entry_ct), tmp_entries); | |
1192 | } | |
1193 | return 0; | |
1194 | } | |
1195 | ||
6caa76b7 | 1196 | long vt_compat_ioctl(struct tty_struct *tty, |
e9216651 AB |
1197 | unsigned int cmd, unsigned long arg) |
1198 | { | |
1199 | struct vc_data *vc = tty->driver_data; | |
1200 | struct console_font_op op; /* used in multiple places here */ | |
e9216651 AB |
1201 | unsigned int console; |
1202 | void __user *up = (void __user *)arg; | |
1203 | int perm; | |
1204 | int ret = 0; | |
1205 | ||
1206 | console = vc->vc_num; | |
1207 | ||
e9216651 AB |
1208 | if (!vc_cons_allocated(console)) { /* impossible? */ |
1209 | ret = -ENOIOCTLCMD; | |
1210 | goto out; | |
1211 | } | |
1212 | ||
1213 | /* | |
1214 | * To have permissions to do most of the vt ioctls, we either have | |
1215 | * to be the owner of the tty, or have CAP_SYS_TTY_CONFIG. | |
1216 | */ | |
1217 | perm = 0; | |
1218 | if (current->signal->tty == tty || capable(CAP_SYS_TTY_CONFIG)) | |
1219 | perm = 1; | |
1220 | ||
e9216651 AB |
1221 | switch (cmd) { |
1222 | /* | |
1223 | * these need special handlers for incompatible data structures | |
1224 | */ | |
1225 | case PIO_FONTX: | |
1226 | case GIO_FONTX: | |
1227 | ret = compat_fontx_ioctl(cmd, up, perm, &op); | |
1228 | break; | |
1229 | ||
1230 | case KDFONTOP: | |
1231 | ret = compat_kdfontop_ioctl(up, perm, &op, vc); | |
1232 | break; | |
1233 | ||
1234 | case PIO_UNIMAP: | |
1235 | case GIO_UNIMAP: | |
4b1fe779 | 1236 | ret = compat_unimap_ioctl(cmd, up, perm, vc); |
e9216651 AB |
1237 | break; |
1238 | ||
1239 | /* | |
1240 | * all these treat 'arg' as an integer | |
1241 | */ | |
1242 | case KIOCSOUND: | |
1243 | case KDMKTONE: | |
1244 | #ifdef CONFIG_X86 | |
1245 | case KDADDIO: | |
1246 | case KDDELIO: | |
1247 | #endif | |
1248 | case KDSETMODE: | |
1249 | case KDMAPDISP: | |
1250 | case KDUNMAPDISP: | |
1251 | case KDSKBMODE: | |
1252 | case KDSKBMETA: | |
1253 | case KDSKBLED: | |
1254 | case KDSETLED: | |
1255 | case KDSIGACCEPT: | |
1256 | case VT_ACTIVATE: | |
1257 | case VT_WAITACTIVE: | |
1258 | case VT_RELDISP: | |
1259 | case VT_DISALLOCATE: | |
1260 | case VT_RESIZE: | |
1261 | case VT_RESIZEX: | |
1262 | goto fallback; | |
1263 | ||
1264 | /* | |
1265 | * the rest has a compatible data structure behind arg, | |
1266 | * but we have to convert it to a proper 64 bit pointer. | |
1267 | */ | |
1268 | default: | |
1269 | arg = (unsigned long)compat_ptr(arg); | |
1270 | goto fallback; | |
1271 | } | |
1272 | out: | |
e9216651 AB |
1273 | return ret; |
1274 | ||
1275 | fallback: | |
6caa76b7 | 1276 | return vt_ioctl(tty, cmd, arg); |
e9216651 AB |
1277 | } |
1278 | ||
1279 | ||
1280 | #endif /* CONFIG_COMPAT */ | |
1281 | ||
1282 | ||
1da177e4 | 1283 | /* |
d3b5cffc AC |
1284 | * Performs the back end of a vt switch. Called under the console |
1285 | * semaphore. | |
1da177e4 LT |
1286 | */ |
1287 | static void complete_change_console(struct vc_data *vc) | |
1288 | { | |
1289 | unsigned char old_vc_mode; | |
8b92e87d | 1290 | int old = fg_console; |
1da177e4 LT |
1291 | |
1292 | last_console = fg_console; | |
1293 | ||
1294 | /* | |
1295 | * If we're switching, we could be going from KD_GRAPHICS to | |
1296 | * KD_TEXT mode or vice versa, which means we need to blank or | |
1297 | * unblank the screen later. | |
1298 | */ | |
1299 | old_vc_mode = vc_cons[fg_console].d->vc_mode; | |
1300 | switch_screen(vc); | |
1301 | ||
1302 | /* | |
3dfcaf16 | 1303 | * This can't appear below a successful kill_pid(). If it did, |
1da177e4 LT |
1304 | * then the *blank_screen operation could occur while X, having |
1305 | * received acqsig, is waking up on another processor. This | |
1306 | * condition can lead to overlapping accesses to the VGA range | |
1307 | * and the framebuffer (causing system lockups). | |
1308 | * | |
1309 | * To account for this we duplicate this code below only if the | |
1310 | * controlling process is gone and we've called reset_vc. | |
1311 | */ | |
1312 | if (old_vc_mode != vc->vc_mode) { | |
1313 | if (vc->vc_mode == KD_TEXT) | |
1314 | do_unblank_screen(1); | |
1315 | else | |
1316 | do_blank_screen(1); | |
1317 | } | |
1318 | ||
1319 | /* | |
1320 | * If this new console is under process control, send it a signal | |
1321 | * telling it that it has acquired. Also check if it has died and | |
1322 | * clean up (similar to logic employed in change_console()) | |
1323 | */ | |
87a6aca5 | 1324 | if (vc->vt_mode.mode == VT_PROCESS) { |
1da177e4 | 1325 | /* |
3dfcaf16 | 1326 | * Send the signal as privileged - kill_pid() will |
1da177e4 LT |
1327 | * tell us if the process has gone or something else |
1328 | * is awry | |
1329 | */ | |
bde0d2c9 | 1330 | if (kill_pid(vc->vt_pid, vc->vt_mode.acqsig, 1) != 0) { |
1da177e4 LT |
1331 | /* |
1332 | * The controlling process has died, so we revert back to | |
1333 | * normal operation. In this case, we'll also change back | |
1334 | * to KD_TEXT mode. I'm not sure if this is strictly correct | |
1335 | * but it saves the agony when the X server dies and the screen | |
1336 | * remains blanked due to KD_GRAPHICS! It would be nice to do | |
1337 | * this outside of VT_PROCESS but there is no single process | |
1338 | * to account for and tracking tty count may be undesirable. | |
1339 | */ | |
1340 | reset_vc(vc); | |
1341 | ||
1342 | if (old_vc_mode != vc->vc_mode) { | |
1343 | if (vc->vc_mode == KD_TEXT) | |
1344 | do_unblank_screen(1); | |
1345 | else | |
1346 | do_blank_screen(1); | |
1347 | } | |
1348 | } | |
1349 | } | |
1350 | ||
1351 | /* | |
1352 | * Wake anyone waiting for their VT to activate | |
1353 | */ | |
8b92e87d | 1354 | vt_event_post(VT_EVENT_SWITCH, old, vc->vc_num); |
1da177e4 LT |
1355 | return; |
1356 | } | |
1357 | ||
1358 | /* | |
1359 | * Performs the front-end of a vt switch | |
1360 | */ | |
1361 | void change_console(struct vc_data *new_vc) | |
1362 | { | |
1363 | struct vc_data *vc; | |
1364 | ||
1365 | if (!new_vc || new_vc->vc_num == fg_console || vt_dont_switch) | |
1366 | return; | |
1367 | ||
1368 | /* | |
1369 | * If this vt is in process mode, then we need to handshake with | |
1370 | * that process before switching. Essentially, we store where that | |
1371 | * vt wants to switch to and wait for it to tell us when it's done | |
1372 | * (via VT_RELDISP ioctl). | |
1373 | * | |
1374 | * We also check to see if the controlling process still exists. | |
1375 | * If it doesn't, we reset this vt to auto mode and continue. | |
1376 | * This is a cheap way to track process control. The worst thing | |
1377 | * that can happen is: we send a signal to a process, it dies, and | |
1378 | * the switch gets "lost" waiting for a response; hopefully, the | |
1379 | * user will try again, we'll detect the process is gone (unless | |
1380 | * the user waits just the right amount of time :-) and revert the | |
1381 | * vt to auto control. | |
1382 | */ | |
1383 | vc = vc_cons[fg_console].d; | |
87a6aca5 | 1384 | if (vc->vt_mode.mode == VT_PROCESS) { |
1da177e4 | 1385 | /* |
3dfcaf16 | 1386 | * Send the signal as privileged - kill_pid() will |
1da177e4 | 1387 | * tell us if the process has gone or something else |
a64314e6 JL |
1388 | * is awry. |
1389 | * | |
1390 | * We need to set vt_newvt *before* sending the signal or we | |
1391 | * have a race. | |
1da177e4 | 1392 | */ |
a64314e6 | 1393 | vc->vt_newvt = new_vc->vc_num; |
bde0d2c9 | 1394 | if (kill_pid(vc->vt_pid, vc->vt_mode.relsig, 1) == 0) { |
1da177e4 | 1395 | /* |
87a6aca5 GKH |
1396 | * It worked. Mark the vt to switch to and |
1397 | * return. The process needs to send us a | |
1398 | * VT_RELDISP ioctl to complete the switch. | |
1da177e4 | 1399 | */ |
87a6aca5 | 1400 | return; |
1da177e4 LT |
1401 | } |
1402 | ||
1403 | /* | |
87a6aca5 GKH |
1404 | * The controlling process has died, so we revert back to |
1405 | * normal operation. In this case, we'll also change back | |
1406 | * to KD_TEXT mode. I'm not sure if this is strictly correct | |
1407 | * but it saves the agony when the X server dies and the screen | |
1408 | * remains blanked due to KD_GRAPHICS! It would be nice to do | |
1409 | * this outside of VT_PROCESS but there is no single process | |
1410 | * to account for and tracking tty count may be undesirable. | |
1411 | */ | |
1412 | reset_vc(vc); | |
1413 | ||
1414 | /* | |
1415 | * Fall through to normal (VT_AUTO) handling of the switch... | |
1da177e4 LT |
1416 | */ |
1417 | } | |
1418 | ||
1419 | /* | |
1420 | * Ignore all switches in KD_GRAPHICS+VT_AUTO mode | |
1421 | */ | |
1422 | if (vc->vc_mode == KD_GRAPHICS) | |
1423 | return; | |
1424 | ||
1425 | complete_change_console(new_vc); | |
1426 | } | |
8d233558 AC |
1427 | |
1428 | /* Perform a kernel triggered VT switch for suspend/resume */ | |
1429 | ||
1430 | static int disable_vt_switch; | |
1431 | ||
1432 | int vt_move_to_console(unsigned int vt, int alloc) | |
1433 | { | |
1434 | int prev; | |
1435 | ||
ac751efa | 1436 | console_lock(); |
8d233558 AC |
1437 | /* Graphics mode - up to X */ |
1438 | if (disable_vt_switch) { | |
ac751efa | 1439 | console_unlock(); |
8d233558 AC |
1440 | return 0; |
1441 | } | |
1442 | prev = fg_console; | |
1443 | ||
1444 | if (alloc && vc_allocate(vt)) { | |
1445 | /* we can't have a free VC for now. Too bad, | |
1446 | * we don't want to mess the screen for now. */ | |
ac751efa | 1447 | console_unlock(); |
8d233558 AC |
1448 | return -ENOSPC; |
1449 | } | |
1450 | ||
1451 | if (set_console(vt)) { | |
1452 | /* | |
1453 | * We're unable to switch to the SUSPEND_CONSOLE. | |
1454 | * Let the calling function know so it can decide | |
1455 | * what to do. | |
1456 | */ | |
ac751efa | 1457 | console_unlock(); |
8d233558 AC |
1458 | return -EIO; |
1459 | } | |
ac751efa | 1460 | console_unlock(); |
797938b5 | 1461 | if (vt_waitactive(vt + 1)) { |
8d233558 AC |
1462 | pr_debug("Suspend: Can't switch VCs."); |
1463 | return -EINTR; | |
1464 | } | |
1465 | return prev; | |
1466 | } | |
1467 | ||
1468 | /* | |
1469 | * Normally during a suspend, we allocate a new console and switch to it. | |
1470 | * When we resume, we switch back to the original console. This switch | |
1471 | * can be slow, so on systems where the framebuffer can handle restoration | |
1472 | * of video registers anyways, there's little point in doing the console | |
1473 | * switch. This function allows you to disable it by passing it '0'. | |
1474 | */ | |
1475 | void pm_set_vt_switch(int do_switch) | |
1476 | { | |
ac751efa | 1477 | console_lock(); |
8d233558 | 1478 | disable_vt_switch = !do_switch; |
ac751efa | 1479 | console_unlock(); |
8d233558 AC |
1480 | } |
1481 | EXPORT_SYMBOL(pm_set_vt_switch); |