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12#include <linux/types.h>
13#include <linux/errno.h>
14#include <linux/sched/signal.h>
15#include <linux/tty.h>
16#include <linux/timer.h>
17#include <linux/kernel.h>
18#include <linux/compat.h>
19#include <linux/module.h>
20#include <linux/kd.h>
21#include <linux/vt.h>
22#include <linux/string.h>
23#include <linux/slab.h>
24#include <linux/major.h>
25#include <linux/fs.h>
26#include <linux/console.h>
27#include <linux/consolemap.h>
28#include <linux/signal.h>
29#include <linux/suspend.h>
30#include <linux/timex.h>
31
32#include <asm/io.h>
33#include <linux/uaccess.h>
34
35#include <linux/nospec.h>
36
37#include <linux/kbd_kern.h>
38#include <linux/vt_kern.h>
39#include <linux/kbd_diacr.h>
40#include <linux/selection.h>
41
42bool vt_dont_switch;
43
44static inline bool vt_in_use(unsigned int i)
45{
46 const struct vc_data *vc = vc_cons[i].d;
47
48
49
50
51
52 WARN_CONSOLE_UNLOCKED();
53
54 return vc && kref_read(&vc->port.kref) > 1;
55}
56
57static inline bool vt_busy(int i)
58{
59 if (vt_in_use(i))
60 return true;
61 if (i == fg_console)
62 return true;
63 if (vc_is_sel(vc_cons[i].d))
64 return true;
65
66 return false;
67}
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82#ifdef CONFIG_X86
83#include <asm/syscalls.h>
84#endif
85
86static void complete_change_console(struct vc_data *vc);
87
88
89
90
91
92struct vt_event_wait {
93 struct list_head list;
94 struct vt_event event;
95 int done;
96};
97
98static LIST_HEAD(vt_events);
99static DEFINE_SPINLOCK(vt_event_lock);
100static DECLARE_WAIT_QUEUE_HEAD(vt_event_waitqueue);
101
102
103
104
105
106
107
108
109
110
111void vt_event_post(unsigned int event, unsigned int old, unsigned int new)
112{
113 struct list_head *pos, *head;
114 unsigned long flags;
115 int wake = 0;
116
117 spin_lock_irqsave(&vt_event_lock, flags);
118 head = &vt_events;
119
120 list_for_each(pos, head) {
121 struct vt_event_wait *ve = list_entry(pos,
122 struct vt_event_wait, list);
123 if (!(ve->event.event & event))
124 continue;
125 ve->event.event = event;
126
127
128 ve->event.oldev = old + 1;
129 ve->event.newev = new + 1;
130 wake = 1;
131 ve->done = 1;
132 }
133 spin_unlock_irqrestore(&vt_event_lock, flags);
134 if (wake)
135 wake_up_interruptible(&vt_event_waitqueue);
136}
137
138static void __vt_event_queue(struct vt_event_wait *vw)
139{
140 unsigned long flags;
141
142 INIT_LIST_HEAD(&vw->list);
143 vw->done = 0;
144
145 spin_lock_irqsave(&vt_event_lock, flags);
146 list_add(&vw->list, &vt_events);
147 spin_unlock_irqrestore(&vt_event_lock, flags);
148}
149
150static void __vt_event_wait(struct vt_event_wait *vw)
151{
152
153 wait_event_interruptible(vt_event_waitqueue, vw->done);
154}
155
156static void __vt_event_dequeue(struct vt_event_wait *vw)
157{
158 unsigned long flags;
159
160
161 spin_lock_irqsave(&vt_event_lock, flags);
162 list_del(&vw->list);
163 spin_unlock_irqrestore(&vt_event_lock, flags);
164}
165
166
167
168
169
170
171
172
173
174
175static void vt_event_wait(struct vt_event_wait *vw)
176{
177 __vt_event_queue(vw);
178 __vt_event_wait(vw);
179 __vt_event_dequeue(vw);
180}
181
182
183
184
185
186
187
188
189static int vt_event_wait_ioctl(struct vt_event __user *event)
190{
191 struct vt_event_wait vw;
192
193 if (copy_from_user(&vw.event, event, sizeof(struct vt_event)))
194 return -EFAULT;
195
196 if (vw.event.event & ~VT_MAX_EVENT)
197 return -EINVAL;
198
199 vt_event_wait(&vw);
200
201 if (vw.done) {
202 if (copy_to_user(event, &vw.event, sizeof(struct vt_event)))
203 return -EFAULT;
204 return 0;
205 }
206 return -EINTR;
207}
208
209
210
211
212
213
214
215
216
217int vt_waitactive(int n)
218{
219 struct vt_event_wait vw;
220 do {
221 vw.event.event = VT_EVENT_SWITCH;
222 __vt_event_queue(&vw);
223 if (n == fg_console + 1) {
224 __vt_event_dequeue(&vw);
225 break;
226 }
227 __vt_event_wait(&vw);
228 __vt_event_dequeue(&vw);
229 if (vw.done == 0)
230 return -EINTR;
231 } while (vw.event.newev != n);
232 return 0;
233}
234
235
236
237
238
239#define GPFIRST 0x3b4
240#define GPLAST 0x3df
241#define GPNUM (GPLAST - GPFIRST + 1)
242
243
244
245
246
247
248
249
250
251
252static int vt_kdsetmode(struct vc_data *vc, unsigned long mode)
253{
254 switch (mode) {
255 case KD_GRAPHICS:
256 break;
257 case KD_TEXT0:
258 case KD_TEXT1:
259 mode = KD_TEXT;
260 fallthrough;
261 case KD_TEXT:
262 break;
263 default:
264 return -EINVAL;
265 }
266
267 if (vc->vc_mode == mode)
268 return 0;
269
270 vc->vc_mode = mode;
271 if (vc->vc_num != fg_console)
272 return 0;
273
274
275 if (mode == KD_TEXT)
276 do_unblank_screen(1);
277 else
278 do_blank_screen(1);
279
280 return 0;
281}
282
283static int vt_k_ioctl(struct tty_struct *tty, unsigned int cmd,
284 unsigned long arg, bool perm)
285{
286 struct vc_data *vc = tty->driver_data;
287 void __user *up = (void __user *)arg;
288 unsigned int console = vc->vc_num;
289 int ret;
290
291 switch (cmd) {
292 case KIOCSOUND:
293 if (!perm)
294 return -EPERM;
295
296
297
298
299
300
301 if (arg)
302 arg = PIT_TICK_RATE / arg;
303 kd_mksound(arg, 0);
304 break;
305
306 case KDMKTONE:
307 if (!perm)
308 return -EPERM;
309 {
310 unsigned int ticks, count;
311
312
313
314
315
316 ticks = msecs_to_jiffies((arg >> 16) & 0xffff);
317 count = ticks ? (arg & 0xffff) : 0;
318 if (count)
319 count = PIT_TICK_RATE / count;
320 kd_mksound(count, ticks);
321 break;
322 }
323
324 case KDGKBTYPE:
325
326
327
328 return put_user(KB_101, (char __user *)arg);
329
330
331
332
333
334
335
336#ifdef CONFIG_X86
337 case KDADDIO:
338 case KDDELIO:
339
340
341
342
343
344
345 if (arg < GPFIRST || arg > GPLAST)
346 return -EINVAL;
347
348 return ksys_ioperm(arg, 1, (cmd == KDADDIO)) ? -ENXIO : 0;
349
350 case KDENABIO:
351 case KDDISABIO:
352 return ksys_ioperm(GPFIRST, GPNUM,
353 (cmd == KDENABIO)) ? -ENXIO : 0;
354#endif
355
356
357
358 case KDKBDREP:
359 {
360 struct kbd_repeat kbrep;
361
362 if (!capable(CAP_SYS_TTY_CONFIG))
363 return -EPERM;
364
365 if (copy_from_user(&kbrep, up, sizeof(struct kbd_repeat)))
366 return -EFAULT;
367
368 ret = kbd_rate(&kbrep);
369 if (ret)
370 return ret;
371 if (copy_to_user(up, &kbrep, sizeof(struct kbd_repeat)))
372 return -EFAULT;
373 break;
374 }
375
376 case KDSETMODE:
377 if (!perm)
378 return -EPERM;
379
380 console_lock();
381 ret = vt_kdsetmode(vc, arg);
382 console_unlock();
383 return ret;
384
385 case KDGETMODE:
386 return put_user(vc->vc_mode, (int __user *)arg);
387
388 case KDMAPDISP:
389 case KDUNMAPDISP:
390
391
392
393
394 return -EINVAL;
395
396 case KDSKBMODE:
397 if (!perm)
398 return -EPERM;
399 ret = vt_do_kdskbmode(console, arg);
400 if (ret)
401 return ret;
402 tty_ldisc_flush(tty);
403 break;
404
405 case KDGKBMODE:
406 return put_user(vt_do_kdgkbmode(console), (int __user *)arg);
407
408
409
410 case KDSKBMETA:
411 return vt_do_kdskbmeta(console, arg);
412
413 case KDGKBMETA:
414
415 return put_user(vt_do_kdgkbmeta(console), (int __user *)arg);
416
417 case KDGETKEYCODE:
418 case KDSETKEYCODE:
419 if(!capable(CAP_SYS_TTY_CONFIG))
420 perm = 0;
421 return vt_do_kbkeycode_ioctl(cmd, up, perm);
422
423 case KDGKBENT:
424 case KDSKBENT:
425 return vt_do_kdsk_ioctl(cmd, up, perm, console);
426
427 case KDGKBSENT:
428 case KDSKBSENT:
429 return vt_do_kdgkb_ioctl(cmd, up, perm);
430
431
432
433 case KDGKBDIACR:
434 case KDGKBDIACRUC:
435 case KDSKBDIACR:
436 case KDSKBDIACRUC:
437 return vt_do_diacrit(cmd, up, perm);
438
439
440
441 case KDGKBLED:
442 case KDSKBLED:
443 case KDGETLED:
444 case KDSETLED:
445 return vt_do_kdskled(console, cmd, arg, perm);
446
447
448
449
450
451
452
453
454 case KDSIGACCEPT:
455 if (!perm || !capable(CAP_KILL))
456 return -EPERM;
457 if (!valid_signal(arg) || arg < 1 || arg == SIGKILL)
458 return -EINVAL;
459
460 spin_lock_irq(&vt_spawn_con.lock);
461 put_pid(vt_spawn_con.pid);
462 vt_spawn_con.pid = get_pid(task_pid(current));
463 vt_spawn_con.sig = arg;
464 spin_unlock_irq(&vt_spawn_con.lock);
465 break;
466
467 case KDFONTOP: {
468 struct console_font_op op;
469
470 if (copy_from_user(&op, up, sizeof(op)))
471 return -EFAULT;
472 if (!perm && op.op != KD_FONT_OP_GET)
473 return -EPERM;
474 ret = con_font_op(vc, &op);
475 if (ret)
476 return ret;
477 if (copy_to_user(up, &op, sizeof(op)))
478 return -EFAULT;
479 break;
480 }
481
482 default:
483 return -ENOIOCTLCMD;
484 }
485
486 return 0;
487}
488
489static inline int do_unimap_ioctl(int cmd, struct unimapdesc __user *user_ud,
490 bool perm, struct vc_data *vc)
491{
492 struct unimapdesc tmp;
493
494 if (copy_from_user(&tmp, user_ud, sizeof tmp))
495 return -EFAULT;
496 switch (cmd) {
497 case PIO_UNIMAP:
498 if (!perm)
499 return -EPERM;
500 return con_set_unimap(vc, tmp.entry_ct, tmp.entries);
501 case GIO_UNIMAP:
502 if (!perm && fg_console != vc->vc_num)
503 return -EPERM;
504 return con_get_unimap(vc, tmp.entry_ct, &(user_ud->entry_ct),
505 tmp.entries);
506 }
507 return 0;
508}
509
510static int vt_io_ioctl(struct vc_data *vc, unsigned int cmd, void __user *up,
511 bool perm)
512{
513 switch (cmd) {
514 case PIO_CMAP:
515 if (!perm)
516 return -EPERM;
517 return con_set_cmap(up);
518
519 case GIO_CMAP:
520 return con_get_cmap(up);
521
522 case PIO_SCRNMAP:
523 if (!perm)
524 return -EPERM;
525 return con_set_trans_old(up);
526
527 case GIO_SCRNMAP:
528 return con_get_trans_old(up);
529
530 case PIO_UNISCRNMAP:
531 if (!perm)
532 return -EPERM;
533 return con_set_trans_new(up);
534
535 case GIO_UNISCRNMAP:
536 return con_get_trans_new(up);
537
538 case PIO_UNIMAPCLR:
539 if (!perm)
540 return -EPERM;
541 con_clear_unimap(vc);
542 break;
543
544 case PIO_UNIMAP:
545 case GIO_UNIMAP:
546 return do_unimap_ioctl(cmd, up, perm, vc);
547
548 default:
549 return -ENOIOCTLCMD;
550 }
551
552 return 0;
553}
554
555static int vt_reldisp(struct vc_data *vc, unsigned int swtch)
556{
557 int newvt, ret;
558
559 if (vc->vt_mode.mode != VT_PROCESS)
560 return -EINVAL;
561
562
563 if (vc->vt_newvt < 0) {
564
565 return swtch == VT_ACKACQ ? 0 : -EINVAL;
566 }
567
568
569 if (swtch == 0) {
570
571 vc->vt_newvt = -1;
572 return 0;
573 }
574
575
576 newvt = vc->vt_newvt;
577 vc->vt_newvt = -1;
578 ret = vc_allocate(newvt);
579 if (ret)
580 return ret;
581
582
583
584
585
586 complete_change_console(vc_cons[newvt].d);
587
588 return 0;
589}
590
591static int vt_setactivate(struct vt_setactivate __user *sa)
592{
593 struct vt_setactivate vsa;
594 struct vc_data *nvc;
595 int ret;
596
597 if (copy_from_user(&vsa, sa, sizeof(vsa)))
598 return -EFAULT;
599 if (vsa.console == 0 || vsa.console > MAX_NR_CONSOLES)
600 return -ENXIO;
601
602 vsa.console = array_index_nospec(vsa.console, MAX_NR_CONSOLES + 1);
603 vsa.console--;
604 console_lock();
605 ret = vc_allocate(vsa.console);
606 if (ret) {
607 console_unlock();
608 return ret;
609 }
610
611
612
613
614
615 nvc = vc_cons[vsa.console].d;
616 nvc->vt_mode = vsa.mode;
617 nvc->vt_mode.frsig = 0;
618 put_pid(nvc->vt_pid);
619 nvc->vt_pid = get_pid(task_pid(current));
620 console_unlock();
621
622
623
624 set_console(vsa.console);
625
626 return 0;
627}
628
629
630static int vt_disallocate(unsigned int vc_num)
631{
632 struct vc_data *vc = NULL;
633 int ret = 0;
634
635 console_lock();
636 if (vt_busy(vc_num))
637 ret = -EBUSY;
638 else if (vc_num)
639 vc = vc_deallocate(vc_num);
640 console_unlock();
641
642 if (vc && vc_num >= MIN_NR_CONSOLES)
643 tty_port_put(&vc->port);
644
645 return ret;
646}
647
648
649static void vt_disallocate_all(void)
650{
651 struct vc_data *vc[MAX_NR_CONSOLES];
652 int i;
653
654 console_lock();
655 for (i = 1; i < MAX_NR_CONSOLES; i++)
656 if (!vt_busy(i))
657 vc[i] = vc_deallocate(i);
658 else
659 vc[i] = NULL;
660 console_unlock();
661
662 for (i = 1; i < MAX_NR_CONSOLES; i++) {
663 if (vc[i] && i >= MIN_NR_CONSOLES)
664 tty_port_put(&vc[i]->port);
665 }
666}
667
668static int vt_resizex(struct vc_data *vc, struct vt_consize __user *cs)
669{
670 struct vt_consize v;
671 int i;
672
673 if (copy_from_user(&v, cs, sizeof(struct vt_consize)))
674 return -EFAULT;
675
676
677 if (!v.v_vlin)
678 v.v_vlin = vc->vc_scan_lines;
679
680 if (v.v_clin) {
681 int rows = v.v_vlin / v.v_clin;
682 if (v.v_rows != rows) {
683 if (v.v_rows)
684 return -EINVAL;
685 v.v_rows = rows;
686 }
687 }
688
689 if (v.v_vcol && v.v_ccol) {
690 int cols = v.v_vcol / v.v_ccol;
691 if (v.v_cols != cols) {
692 if (v.v_cols)
693 return -EINVAL;
694 v.v_cols = cols;
695 }
696 }
697
698 if (v.v_clin > 32)
699 return -EINVAL;
700
701 for (i = 0; i < MAX_NR_CONSOLES; i++) {
702 struct vc_data *vcp;
703
704 if (!vc_cons[i].d)
705 continue;
706 console_lock();
707 vcp = vc_cons[i].d;
708 if (vcp) {
709 int ret;
710 int save_scan_lines = vcp->vc_scan_lines;
711 int save_cell_height = vcp->vc_cell_height;
712
713 if (v.v_vlin)
714 vcp->vc_scan_lines = v.v_vlin;
715 if (v.v_clin)
716 vcp->vc_cell_height = v.v_clin;
717 vcp->vc_resize_user = 1;
718 ret = vc_resize(vcp, v.v_cols, v.v_rows);
719 if (ret) {
720 vcp->vc_scan_lines = save_scan_lines;
721 vcp->vc_cell_height = save_cell_height;
722 console_unlock();
723 return ret;
724 }
725 }
726 console_unlock();
727 }
728
729 return 0;
730}
731
732
733
734
735
736int vt_ioctl(struct tty_struct *tty,
737 unsigned int cmd, unsigned long arg)
738{
739 struct vc_data *vc = tty->driver_data;
740 void __user *up = (void __user *)arg;
741 int i, perm;
742 int ret;
743
744
745
746
747
748 perm = 0;
749 if (current->signal->tty == tty || capable(CAP_SYS_TTY_CONFIG))
750 perm = 1;
751
752 ret = vt_k_ioctl(tty, cmd, arg, perm);
753 if (ret != -ENOIOCTLCMD)
754 return ret;
755
756 ret = vt_io_ioctl(vc, cmd, up, perm);
757 if (ret != -ENOIOCTLCMD)
758 return ret;
759
760 switch (cmd) {
761 case TIOCLINUX:
762 return tioclinux(tty, arg);
763 case VT_SETMODE:
764 {
765 struct vt_mode tmp;
766
767 if (!perm)
768 return -EPERM;
769 if (copy_from_user(&tmp, up, sizeof(struct vt_mode)))
770 return -EFAULT;
771 if (tmp.mode != VT_AUTO && tmp.mode != VT_PROCESS)
772 return -EINVAL;
773
774 console_lock();
775 vc->vt_mode = tmp;
776
777 vc->vt_mode.frsig = 0;
778 put_pid(vc->vt_pid);
779 vc->vt_pid = get_pid(task_pid(current));
780
781 vc->vt_newvt = -1;
782 console_unlock();
783 break;
784 }
785
786 case VT_GETMODE:
787 {
788 struct vt_mode tmp;
789 int rc;
790
791 console_lock();
792 memcpy(&tmp, &vc->vt_mode, sizeof(struct vt_mode));
793 console_unlock();
794
795 rc = copy_to_user(up, &tmp, sizeof(struct vt_mode));
796 if (rc)
797 return -EFAULT;
798 break;
799 }
800
801
802
803
804
805
806 case VT_GETSTATE:
807 {
808 struct vt_stat __user *vtstat = up;
809 unsigned short state, mask;
810
811 if (put_user(fg_console + 1, &vtstat->v_active))
812 return -EFAULT;
813
814 state = 1;
815 console_lock();
816 for (i = 0, mask = 2; i < MAX_NR_CONSOLES && mask;
817 ++i, mask <<= 1)
818 if (vt_in_use(i))
819 state |= mask;
820 console_unlock();
821 return put_user(state, &vtstat->v_state);
822 }
823
824
825
826
827 case VT_OPENQRY:
828 console_lock();
829 for (i = 0; i < MAX_NR_CONSOLES; ++i)
830 if (!vt_in_use(i))
831 break;
832 console_unlock();
833 i = i < MAX_NR_CONSOLES ? (i+1) : -1;
834 return put_user(i, (int __user *)arg);
835
836
837
838
839
840
841 case VT_ACTIVATE:
842 if (!perm)
843 return -EPERM;
844 if (arg == 0 || arg > MAX_NR_CONSOLES)
845 return -ENXIO;
846
847 arg--;
848 console_lock();
849 ret = vc_allocate(arg);
850 console_unlock();
851 if (ret)
852 return ret;
853 set_console(arg);
854 break;
855
856 case VT_SETACTIVATE:
857 if (!perm)
858 return -EPERM;
859
860 return vt_setactivate(up);
861
862
863
864
865 case VT_WAITACTIVE:
866 if (!perm)
867 return -EPERM;
868 if (arg == 0 || arg > MAX_NR_CONSOLES)
869 return -ENXIO;
870 return vt_waitactive(arg);
871
872
873
874
875
876
877
878
879
880
881
882 case VT_RELDISP:
883 if (!perm)
884 return -EPERM;
885
886 console_lock();
887 ret = vt_reldisp(vc, arg);
888 console_unlock();
889
890 return ret;
891
892
893
894
895
896 case VT_DISALLOCATE:
897 if (arg > MAX_NR_CONSOLES)
898 return -ENXIO;
899
900 if (arg == 0)
901 vt_disallocate_all();
902 else
903 return vt_disallocate(--arg);
904 break;
905
906 case VT_RESIZE:
907 {
908 struct vt_sizes __user *vtsizes = up;
909 struct vc_data *vc;
910 ushort ll,cc;
911
912 if (!perm)
913 return -EPERM;
914 if (get_user(ll, &vtsizes->v_rows) ||
915 get_user(cc, &vtsizes->v_cols))
916 return -EFAULT;
917
918 console_lock();
919 for (i = 0; i < MAX_NR_CONSOLES; i++) {
920 vc = vc_cons[i].d;
921
922 if (vc) {
923 vc->vc_resize_user = 1;
924
925 vc_resize(vc_cons[i].d, cc, ll);
926 }
927 }
928 console_unlock();
929 break;
930 }
931
932 case VT_RESIZEX:
933 if (!perm)
934 return -EPERM;
935
936 return vt_resizex(vc, up);
937
938 case VT_LOCKSWITCH:
939 if (!capable(CAP_SYS_TTY_CONFIG))
940 return -EPERM;
941 vt_dont_switch = true;
942 break;
943 case VT_UNLOCKSWITCH:
944 if (!capable(CAP_SYS_TTY_CONFIG))
945 return -EPERM;
946 vt_dont_switch = false;
947 break;
948 case VT_GETHIFONTMASK:
949 return put_user(vc->vc_hi_font_mask,
950 (unsigned short __user *)arg);
951 case VT_WAITEVENT:
952 return vt_event_wait_ioctl((struct vt_event __user *)arg);
953 default:
954 return -ENOIOCTLCMD;
955 }
956
957 return 0;
958}
959
960void reset_vc(struct vc_data *vc)
961{
962 vc->vc_mode = KD_TEXT;
963 vt_reset_unicode(vc->vc_num);
964 vc->vt_mode.mode = VT_AUTO;
965 vc->vt_mode.waitv = 0;
966 vc->vt_mode.relsig = 0;
967 vc->vt_mode.acqsig = 0;
968 vc->vt_mode.frsig = 0;
969 put_pid(vc->vt_pid);
970 vc->vt_pid = NULL;
971 vc->vt_newvt = -1;
972 reset_palette(vc);
973}
974
975void vc_SAK(struct work_struct *work)
976{
977 struct vc *vc_con =
978 container_of(work, struct vc, SAK_work);
979 struct vc_data *vc;
980 struct tty_struct *tty;
981
982 console_lock();
983 vc = vc_con->d;
984 if (vc) {
985
986 tty = vc->port.tty;
987
988
989
990
991 if (tty)
992 __do_SAK(tty);
993 reset_vc(vc);
994 }
995 console_unlock();
996}
997
998#ifdef CONFIG_COMPAT
999
1000struct compat_console_font_op {
1001 compat_uint_t op;
1002 compat_uint_t flags;
1003 compat_uint_t width, height;
1004 compat_uint_t charcount;
1005 compat_caddr_t data;
1006};
1007
1008static inline int
1009compat_kdfontop_ioctl(struct compat_console_font_op __user *fontop,
1010 int perm, struct console_font_op *op, struct vc_data *vc)
1011{
1012 int i;
1013
1014 if (copy_from_user(op, fontop, sizeof(struct compat_console_font_op)))
1015 return -EFAULT;
1016 if (!perm && op->op != KD_FONT_OP_GET)
1017 return -EPERM;
1018 op->data = compat_ptr(((struct compat_console_font_op *)op)->data);
1019 i = con_font_op(vc, op);
1020 if (i)
1021 return i;
1022 ((struct compat_console_font_op *)op)->data = (unsigned long)op->data;
1023 if (copy_to_user(fontop, op, sizeof(struct compat_console_font_op)))
1024 return -EFAULT;
1025 return 0;
1026}
1027
1028struct compat_unimapdesc {
1029 unsigned short entry_ct;
1030 compat_caddr_t entries;
1031};
1032
1033static inline int
1034compat_unimap_ioctl(unsigned int cmd, struct compat_unimapdesc __user *user_ud,
1035 int perm, struct vc_data *vc)
1036{
1037 struct compat_unimapdesc tmp;
1038 struct unipair __user *tmp_entries;
1039
1040 if (copy_from_user(&tmp, user_ud, sizeof tmp))
1041 return -EFAULT;
1042 tmp_entries = compat_ptr(tmp.entries);
1043 switch (cmd) {
1044 case PIO_UNIMAP:
1045 if (!perm)
1046 return -EPERM;
1047 return con_set_unimap(vc, tmp.entry_ct, tmp_entries);
1048 case GIO_UNIMAP:
1049 if (!perm && fg_console != vc->vc_num)
1050 return -EPERM;
1051 return con_get_unimap(vc, tmp.entry_ct, &(user_ud->entry_ct), tmp_entries);
1052 }
1053 return 0;
1054}
1055
1056long vt_compat_ioctl(struct tty_struct *tty,
1057 unsigned int cmd, unsigned long arg)
1058{
1059 struct vc_data *vc = tty->driver_data;
1060 struct console_font_op op;
1061 void __user *up = compat_ptr(arg);
1062 int perm;
1063
1064
1065
1066
1067
1068 perm = 0;
1069 if (current->signal->tty == tty || capable(CAP_SYS_TTY_CONFIG))
1070 perm = 1;
1071
1072 switch (cmd) {
1073
1074
1075
1076
1077 case KDFONTOP:
1078 return compat_kdfontop_ioctl(up, perm, &op, vc);
1079
1080 case PIO_UNIMAP:
1081 case GIO_UNIMAP:
1082 return compat_unimap_ioctl(cmd, up, perm, vc);
1083
1084
1085
1086
1087 case KIOCSOUND:
1088 case KDMKTONE:
1089#ifdef CONFIG_X86
1090 case KDADDIO:
1091 case KDDELIO:
1092#endif
1093 case KDSETMODE:
1094 case KDMAPDISP:
1095 case KDUNMAPDISP:
1096 case KDSKBMODE:
1097 case KDSKBMETA:
1098 case KDSKBLED:
1099 case KDSETLED:
1100 case KDSIGACCEPT:
1101 case VT_ACTIVATE:
1102 case VT_WAITACTIVE:
1103 case VT_RELDISP:
1104 case VT_DISALLOCATE:
1105 case VT_RESIZE:
1106 case VT_RESIZEX:
1107 return vt_ioctl(tty, cmd, arg);
1108
1109
1110
1111
1112
1113 default:
1114 return vt_ioctl(tty, cmd, (unsigned long)up);
1115 }
1116}
1117
1118
1119#endif
1120
1121
1122
1123
1124
1125
1126static void complete_change_console(struct vc_data *vc)
1127{
1128 unsigned char old_vc_mode;
1129 int old = fg_console;
1130
1131 last_console = fg_console;
1132
1133
1134
1135
1136
1137
1138 old_vc_mode = vc_cons[fg_console].d->vc_mode;
1139 switch_screen(vc);
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151 if (old_vc_mode != vc->vc_mode) {
1152 if (vc->vc_mode == KD_TEXT)
1153 do_unblank_screen(1);
1154 else
1155 do_blank_screen(1);
1156 }
1157
1158
1159
1160
1161
1162
1163 if (vc->vt_mode.mode == VT_PROCESS) {
1164
1165
1166
1167
1168
1169 if (kill_pid(vc->vt_pid, vc->vt_mode.acqsig, 1) != 0) {
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179 reset_vc(vc);
1180
1181 if (old_vc_mode != vc->vc_mode) {
1182 if (vc->vc_mode == KD_TEXT)
1183 do_unblank_screen(1);
1184 else
1185 do_blank_screen(1);
1186 }
1187 }
1188 }
1189
1190
1191
1192
1193 vt_event_post(VT_EVENT_SWITCH, old, vc->vc_num);
1194 return;
1195}
1196
1197
1198
1199
1200void change_console(struct vc_data *new_vc)
1201{
1202 struct vc_data *vc;
1203
1204 if (!new_vc || new_vc->vc_num == fg_console || vt_dont_switch)
1205 return;
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222 vc = vc_cons[fg_console].d;
1223 if (vc->vt_mode.mode == VT_PROCESS) {
1224
1225
1226
1227
1228
1229
1230
1231
1232 vc->vt_newvt = new_vc->vc_num;
1233 if (kill_pid(vc->vt_pid, vc->vt_mode.relsig, 1) == 0) {
1234
1235
1236
1237
1238
1239 return;
1240 }
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251 reset_vc(vc);
1252
1253
1254
1255
1256 }
1257
1258
1259
1260
1261 if (vc->vc_mode == KD_GRAPHICS)
1262 return;
1263
1264 complete_change_console(new_vc);
1265}
1266
1267
1268
1269static int disable_vt_switch;
1270
1271int vt_move_to_console(unsigned int vt, int alloc)
1272{
1273 int prev;
1274
1275 console_lock();
1276
1277 if (disable_vt_switch) {
1278 console_unlock();
1279 return 0;
1280 }
1281 prev = fg_console;
1282
1283 if (alloc && vc_allocate(vt)) {
1284
1285
1286 console_unlock();
1287 return -ENOSPC;
1288 }
1289
1290 if (set_console(vt)) {
1291
1292
1293
1294
1295
1296 console_unlock();
1297 return -EIO;
1298 }
1299 console_unlock();
1300 if (vt_waitactive(vt + 1)) {
1301 pr_debug("Suspend: Can't switch VCs.");
1302 return -EINTR;
1303 }
1304 return prev;
1305}
1306
1307
1308
1309
1310
1311
1312
1313
1314void pm_set_vt_switch(int do_switch)
1315{
1316 console_lock();
1317 disable_vt_switch = !do_switch;
1318 console_unlock();
1319}
1320EXPORT_SYMBOL(pm_set_vt_switch);
1321