Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | #include <linux/types.h> |
| 12 | #include <linux/errno.h> |
Ingo Molnar | 3f07c01 | 2017-02-08 18:51:30 +0100 | [diff] [blame] | 13 | #include <linux/sched/signal.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | #include <linux/tty.h> |
| 15 | #include <linux/timer.h> |
| 16 | #include <linux/kernel.h> |
Arnd Bergmann | e921665 | 2009-08-06 15:09:28 +0200 | [diff] [blame] | 17 | #include <linux/compat.h> |
Alan Cox | 8d23355 | 2009-09-19 13:13:25 -0700 | [diff] [blame] | 18 | #include <linux/module.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Samuel Thibault | 04c7197 | 2007-10-16 23:27:04 -0700 | [diff] [blame] | 26 | #include <linux/consolemap.h> |
Jesper Juhl | 7ed20e1 | 2005-05-01 08:59:14 -0700 | [diff] [blame] | 27 | #include <linux/signal.h> |
Josh Triplett | a5e04b7 | 2012-11-18 21:27:41 -0800 | [diff] [blame] | 28 | #include <linux/suspend.h> |
Emmanuel Colbus | bcc8ca0 | 2005-06-28 20:44:49 -0700 | [diff] [blame] | 29 | #include <linux/timex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | |
| 31 | #include <asm/io.h> |
Linus Torvalds | 7c0f6ba | 2016-12-24 11:46:01 -0800 | [diff] [blame] | 32 | #include <linux/uaccess.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Andrew Johnson | b257bc0 | 2007-03-16 13:38:24 -0800 | [diff] [blame] | 39 | char vt_dont_switch; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 64 | /* |
Alan Cox | 8b92e87 | 2009-09-19 13:13:24 -0700 | [diff] [blame] | 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 */ |
Alan Cox | 308efab | 2009-11-19 13:30:36 +0000 | [diff] [blame] | 104 | ve->event.oldev = old + 1; |
| 105 | ve->event.newev = new + 1; |
Alan Cox | 8b92e87 | 2009-09-19 13:13:24 -0700 | [diff] [blame] | 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 | |
Rabin Vincent | a7b1292 | 2012-05-21 13:38:42 +0530 | [diff] [blame] | 114 | static void __vt_event_queue(struct vt_event_wait *vw) |
| 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); |
| 124 | } |
| 125 | |
| 126 | static void __vt_event_wait(struct vt_event_wait *vw) |
| 127 | { |
| 128 | /* Wait for it to pass */ |
| 129 | wait_event_interruptible(vt_event_waitqueue, vw->done); |
| 130 | } |
| 131 | |
| 132 | static void __vt_event_dequeue(struct vt_event_wait *vw) |
| 133 | { |
| 134 | unsigned long flags; |
| 135 | |
| 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 | |
Alan Cox | 8b92e87 | 2009-09-19 13:13:24 -0700 | [diff] [blame] | 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 | { |
Rabin Vincent | a7b1292 | 2012-05-21 13:38:42 +0530 | [diff] [blame] | 153 | __vt_event_queue(vw); |
| 154 | __vt_event_wait(vw); |
| 155 | __vt_event_dequeue(vw); |
Alan Cox | 8b92e87 | 2009-09-19 13:13:24 -0700 | [diff] [blame] | 156 | } |
| 157 | |
| 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 { |
Alan Cox | 8b92e87 | 2009-09-19 13:13:24 -0700 | [diff] [blame] | 198 | vw.event.event = VT_EVENT_SWITCH; |
Rabin Vincent | a7b1292 | 2012-05-21 13:38:42 +0530 | [diff] [blame] | 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); |
Alan Cox | 8b92e87 | 2009-09-19 13:13:24 -0700 | [diff] [blame] | 206 | if (vw.done == 0) |
| 207 | return -EINTR; |
Alan Cox | 308efab | 2009-11-19 13:30:36 +0000 | [diff] [blame] | 208 | } while (vw.event.newev != n); |
Alan Cox | 8b92e87 | 2009-09-19 13:13:24 -0700 | [diff] [blame] | 209 | return 0; |
| 210 | } |
| 211 | |
| 212 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Peter Hurley | 421b40a | 2013-05-17 12:41:03 -0400 | [diff] [blame] | 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 | |
Peter Hurley | 421b40a | 2013-05-17 12:41:03 -0400 | [diff] [blame] | 292 | console_lock(); |
| 293 | if (VT_BUSY(vc_num)) |
| 294 | ret = -EBUSY; |
Ross Lagerwall | ef223fb | 2013-06-14 23:24:25 +0100 | [diff] [blame] | 295 | else if (vc_num) |
Peter Hurley | 421b40a | 2013-05-17 12:41:03 -0400 | [diff] [blame] | 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 | } |
Alan Cox | 8b92e87 | 2009-09-19 13:13:24 -0700 | [diff] [blame] | 328 | |
| 329 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | */ |
Alan Cox | 6caa76b | 2011-02-14 16:27:22 +0000 | [diff] [blame] | 334 | int vt_ioctl(struct tty_struct *tty, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | unsigned int cmd, unsigned long arg) |
| 336 | { |
Alan Cox | c9f19e9 | 2009-01-02 13:47:26 +0000 | [diff] [blame] | 337 | struct vc_data *vc = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | struct console_font_op op; /* used in multiple places here */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | unsigned int console; |
| 340 | unsigned char ucval; |
Graham Gower | 1e0ad28 | 2010-10-27 15:33:00 -0700 | [diff] [blame] | 341 | unsigned int uival; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | void __user *up = (void __user *)arg; |
| 343 | int i, perm; |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 344 | int ret = 0; |
| 345 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | console = vc->vc_num; |
| 347 | |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 348 | |
| 349 | if (!vc_cons_allocated(console)) { /* impossible? */ |
| 350 | ret = -ENOIOCTLCMD; |
| 351 | goto out; |
| 352 | } |
| 353 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | switch (cmd) { |
Alan Cox | e688510 | 2008-10-13 10:36:40 +0100 | [diff] [blame] | 364 | case TIOCLINUX: |
Jiri Slaby | a115902 | 2009-06-22 18:42:18 +0100 | [diff] [blame] | 365 | ret = tioclinux(tty, arg); |
| 366 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | case KIOCSOUND: |
| 368 | if (!perm) |
Alan Cox | 4001d7b | 2012-03-02 14:59:20 +0000 | [diff] [blame] | 369 | return -EPERM; |
Arnd Bergmann | 2c4e967 | 2010-08-28 20:35:17 -0700 | [diff] [blame] | 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 |
Alan Cox | 4001d7b | 2012-03-02 14:59:20 +0000 | [diff] [blame] | 374 | * change. kd_mksound is locked by the input layer. |
Arnd Bergmann | 2c4e967 | 2010-08-28 20:35:17 -0700 | [diff] [blame] | 375 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | if (arg) |
Arnd Bergmann | 2c4e967 | 2010-08-28 20:35:17 -0700 | [diff] [blame] | 377 | arg = PIT_TICK_RATE / arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | kd_mksound(arg, 0); |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 379 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | |
| 381 | case KDMKTONE: |
| 382 | if (!perm) |
Alan Cox | 4001d7b | 2012-03-02 14:59:20 +0000 | [diff] [blame] | 383 | return -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | */ |
Nicholas Mc Guire | 4c0d9b1 | 2015-02-09 10:53:25 -0500 | [diff] [blame] | 391 | ticks = msecs_to_jiffies((arg >> 16) & 0xffff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | count = ticks ? (arg & 0xffff) : 0; |
| 393 | if (count) |
Arnd Bergmann | 2c4e967 | 2010-08-28 20:35:17 -0700 | [diff] [blame] | 394 | count = PIT_TICK_RATE / count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | kd_mksound(count, ticks); |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 396 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | } |
| 398 | |
| 399 | case KDGKBTYPE: |
| 400 | /* |
Alan Cox | 4001d7b | 2012-03-02 14:59:20 +0000 | [diff] [blame] | 401 | * this is naïve. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | */ |
| 403 | ucval = KB_101; |
Alan Cox | 079c953 | 2012-02-28 14:49:23 +0000 | [diff] [blame] | 404 | ret = put_user(ucval, (char __user *)arg); |
| 405 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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... |
Alan Cox | 4001d7b | 2012-03-02 14:59:20 +0000 | [diff] [blame] | 419 | * |
| 420 | * These are locked internally via sys_ioperm |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | */ |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 422 | if (arg < GPFIRST || arg > GPLAST) { |
| 423 | ret = -EINVAL; |
| 424 | break; |
| 425 | } |
| 426 | ret = sys_ioperm(arg, 1, (cmd == KDADDIO)) ? -ENXIO : 0; |
| 427 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | |
| 429 | case KDENABIO: |
| 430 | case KDDISABIO: |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 431 | ret = sys_ioperm(GPFIRST, GPNUM, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | (cmd == KDENABIO)) ? -ENXIO : 0; |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 433 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | |
| 442 | if (!capable(CAP_SYS_TTY_CONFIG)) |
Alan Cox | 4001d7b | 2012-03-02 14:59:20 +0000 | [diff] [blame] | 443 | return -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 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; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | if (copy_to_user(up, &kbrep, sizeof(struct kbd_repeat))) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 453 | ret = -EFAULT; |
| 454 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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) |
Alan Cox | 4001d7b | 2012-03-02 14:59:20 +0000 | [diff] [blame] | 467 | return -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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: |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 477 | ret = -EINVAL; |
| 478 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | } |
Alan Cox | 4001d7b | 2012-03-02 14:59:20 +0000 | [diff] [blame] | 480 | /* FIXME: this needs the console lock extending */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | if (vc->vc_mode == (unsigned char) arg) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 482 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | vc->vc_mode = (unsigned char) arg; |
| 484 | if (console != fg_console) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 485 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | /* |
| 487 | * explicitly blank/unblank the screen if switching modes |
| 488 | */ |
Torben Hohn | ac751ef | 2011-01-25 15:07:35 -0800 | [diff] [blame] | 489 | console_lock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | if (arg == KD_TEXT) |
| 491 | do_unblank_screen(1); |
| 492 | else |
| 493 | do_blank_screen(1); |
Torben Hohn | ac751ef | 2011-01-25 15:07:35 -0800 | [diff] [blame] | 494 | console_unlock(); |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 495 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | |
| 497 | case KDGETMODE: |
Graham Gower | 1e0ad28 | 2010-10-27 15:33:00 -0700 | [diff] [blame] | 498 | uival = vc->vc_mode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | */ |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 507 | ret = -EINVAL; |
| 508 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | |
| 510 | case KDSKBMODE: |
| 511 | if (!perm) |
Alan Cox | 4001d7b | 2012-03-02 14:59:20 +0000 | [diff] [blame] | 512 | return -EPERM; |
Alan Cox | 079c953 | 2012-02-28 14:49:23 +0000 | [diff] [blame] | 513 | ret = vt_do_kdskbmode(console, arg); |
| 514 | if (ret == 0) |
| 515 | tty_ldisc_flush(tty); |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 516 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | |
| 518 | case KDGKBMODE: |
Alan Cox | 079c953 | 2012-02-28 14:49:23 +0000 | [diff] [blame] | 519 | uival = vt_do_kdgkbmode(console); |
| 520 | ret = put_user(uival, (int __user *)arg); |
| 521 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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: |
Alan Cox | 079c953 | 2012-02-28 14:49:23 +0000 | [diff] [blame] | 526 | ret = vt_do_kdskbmeta(console, arg); |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 527 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | |
| 529 | case KDGKBMETA: |
Alan Cox | 079c953 | 2012-02-28 14:49:23 +0000 | [diff] [blame] | 530 | /* FIXME: should review whether this is worth locking */ |
| 531 | uival = vt_do_kdgkbmeta(console); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | setint: |
Graham Gower | 1e0ad28 | 2010-10-27 15:33:00 -0700 | [diff] [blame] | 533 | ret = put_user(uival, (int __user *)arg); |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 534 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | |
| 536 | case KDGETKEYCODE: |
| 537 | case KDSETKEYCODE: |
| 538 | if(!capable(CAP_SYS_TTY_CONFIG)) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 539 | perm = 0; |
Alan Cox | 079c953 | 2012-02-28 14:49:23 +0000 | [diff] [blame] | 540 | ret = vt_do_kbkeycode_ioctl(cmd, up, perm); |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 541 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | |
| 543 | case KDGKBENT: |
| 544 | case KDSKBENT: |
Alan Cox | 079c953 | 2012-02-28 14:49:23 +0000 | [diff] [blame] | 545 | ret = vt_do_kdsk_ioctl(cmd, up, perm, console); |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 546 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | |
| 548 | case KDGKBSENT: |
| 549 | case KDSKBSENT: |
Alan Cox | 079c953 | 2012-02-28 14:49:23 +0000 | [diff] [blame] | 550 | ret = vt_do_kdgkb_ioctl(cmd, up, perm); |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 551 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | |
Alan Cox | 247ff8e | 2012-02-24 12:47:11 +0000 | [diff] [blame] | 553 | /* Diacritical processing. Handled in keyboard.c as it has |
| 554 | to operate on the keyboard locks and structures */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | case KDGKBDIACR: |
Samuel Thibault | 04c7197 | 2007-10-16 23:27:04 -0700 | [diff] [blame] | 556 | case KDGKBDIACRUC: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | case KDSKBDIACR: |
Samuel Thibault | 04c7197 | 2007-10-16 23:27:04 -0700 | [diff] [blame] | 558 | case KDSKBDIACRUC: |
Alan Cox | 247ff8e | 2012-02-24 12:47:11 +0000 | [diff] [blame] | 559 | ret = vt_do_diacrit(cmd, up, perm); |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 560 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | case KDSKBLED: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | case KDGETLED: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | case KDSETLED: |
Alan Cox | 079c953 | 2012-02-28 14:49:23 +0000 | [diff] [blame] | 568 | ret = vt_do_kdskled(console, cmd, arg, perm); |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 569 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | if (!perm || !capable(CAP_KILL)) |
Alan Cox | 4001d7b | 2012-03-02 14:59:20 +0000 | [diff] [blame] | 581 | return -EPERM; |
Jesper Juhl | 7ed20e1 | 2005-05-01 08:59:14 -0700 | [diff] [blame] | 582 | if (!valid_signal(arg) || arg < 1 || arg == SIGKILL) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 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; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | } |
| 593 | |
| 594 | case VT_SETMODE: |
| 595 | { |
| 596 | struct vt_mode tmp; |
| 597 | |
| 598 | if (!perm) |
Alan Cox | 4001d7b | 2012-03-02 14:59:20 +0000 | [diff] [blame] | 599 | return -EPERM; |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 600 | if (copy_from_user(&tmp, up, sizeof(struct vt_mode))) { |
| 601 | ret = -EFAULT; |
| 602 | goto out; |
| 603 | } |
Greg Kroah-Hartman | 87a6aca | 2010-03-15 17:14:15 -0700 | [diff] [blame] | 604 | if (tmp.mode != VT_AUTO && tmp.mode != VT_PROCESS) { |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 605 | ret = -EINVAL; |
| 606 | goto out; |
| 607 | } |
Torben Hohn | ac751ef | 2011-01-25 15:07:35 -0800 | [diff] [blame] | 608 | console_lock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | vc->vt_mode = tmp; |
| 610 | /* the frsig is ignored, so we set it to 0 */ |
| 611 | vc->vt_mode.frsig = 0; |
Eric W. Biederman | 8b6312f | 2007-02-10 01:44:34 -0800 | [diff] [blame] | 612 | put_pid(vc->vt_pid); |
| 613 | vc->vt_pid = get_pid(task_pid(current)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | /* no switch is required -- saw@shade.msu.ru */ |
| 615 | vc->vt_newvt = -1; |
Torben Hohn | ac751ef | 2011-01-25 15:07:35 -0800 | [diff] [blame] | 616 | console_unlock(); |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 617 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | } |
| 619 | |
| 620 | case VT_GETMODE: |
| 621 | { |
| 622 | struct vt_mode tmp; |
| 623 | int rc; |
| 624 | |
Torben Hohn | ac751ef | 2011-01-25 15:07:35 -0800 | [diff] [blame] | 625 | console_lock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | memcpy(&tmp, &vc->vt_mode, sizeof(struct vt_mode)); |
Torben Hohn | ac751ef | 2011-01-25 15:07:35 -0800 | [diff] [blame] | 627 | console_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | |
| 629 | rc = copy_to_user(up, &tmp, sizeof(struct vt_mode)); |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 630 | if (rc) |
| 631 | ret = -EFAULT; |
| 632 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Alan Cox | 4001d7b | 2012-03-02 14:59:20 +0000 | [diff] [blame] | 645 | /* Review: FIXME: Console lock ? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | if (put_user(fg_console + 1, &vtstat->v_active)) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 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; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | } |
| 658 | |
| 659 | /* |
| 660 | * Returns the first available (non-opened) console. |
| 661 | */ |
| 662 | case VT_OPENQRY: |
Alan Cox | 4001d7b | 2012-03-02 14:59:20 +0000 | [diff] [blame] | 663 | /* FIXME: locking ? - but then this is a stupid API */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | for (i = 0; i < MAX_NR_CONSOLES; ++i) |
| 665 | if (! VT_IS_IN_USE(i)) |
| 666 | break; |
Graham Gower | 1e0ad28 | 2010-10-27 15:33:00 -0700 | [diff] [blame] | 667 | uival = i < MAX_NR_CONSOLES ? (i+1) : -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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) |
Alan Cox | 4001d7b | 2012-03-02 14:59:20 +0000 | [diff] [blame] | 677 | return -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | if (arg == 0 || arg > MAX_NR_CONSOLES) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 679 | ret = -ENXIO; |
| 680 | else { |
| 681 | arg--; |
Torben Hohn | ac751ef | 2011-01-25 15:07:35 -0800 | [diff] [blame] | 682 | console_lock(); |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 683 | ret = vc_allocate(arg); |
Torben Hohn | ac751ef | 2011-01-25 15:07:35 -0800 | [diff] [blame] | 684 | console_unlock(); |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 685 | if (ret) |
| 686 | break; |
| 687 | set_console(arg); |
| 688 | } |
| 689 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | |
Alan Cox | d3b5cff | 2009-09-19 13:13:26 -0700 | [diff] [blame] | 691 | case VT_SETACTIVATE: |
| 692 | { |
| 693 | struct vt_setactivate vsa; |
| 694 | |
| 695 | if (!perm) |
Alan Cox | 4001d7b | 2012-03-02 14:59:20 +0000 | [diff] [blame] | 696 | return -EPERM; |
Alan Cox | d3b5cff | 2009-09-19 13:13:26 -0700 | [diff] [blame] | 697 | |
| 698 | if (copy_from_user(&vsa, (struct vt_setactivate __user *)arg, |
Jiri Slaby | a09efb0 | 2009-10-01 15:43:59 -0700 | [diff] [blame] | 699 | sizeof(struct vt_setactivate))) { |
| 700 | ret = -EFAULT; |
| 701 | goto out; |
| 702 | } |
Alan Cox | d3b5cff | 2009-09-19 13:13:26 -0700 | [diff] [blame] | 703 | if (vsa.console == 0 || vsa.console > MAX_NR_CONSOLES) |
| 704 | ret = -ENXIO; |
| 705 | else { |
| 706 | vsa.console--; |
Torben Hohn | ac751ef | 2011-01-25 15:07:35 -0800 | [diff] [blame] | 707 | console_lock(); |
Alan Cox | d3b5cff | 2009-09-19 13:13:26 -0700 | [diff] [blame] | 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 | } |
Torben Hohn | ac751ef | 2011-01-25 15:07:35 -0800 | [diff] [blame] | 720 | console_unlock(); |
Alan Cox | d3b5cff | 2009-09-19 13:13:26 -0700 | [diff] [blame] | 721 | if (ret) |
| 722 | break; |
| 723 | /* Commence switch and lock */ |
Alan Cox | 4001d7b | 2012-03-02 14:59:20 +0000 | [diff] [blame] | 724 | /* Review set_console locks */ |
Jiri Olsa | d637837 | 2011-02-11 15:39:28 +0100 | [diff] [blame] | 725 | set_console(vsa.console); |
Alan Cox | d3b5cff | 2009-09-19 13:13:26 -0700 | [diff] [blame] | 726 | } |
Jiri Olsa | d637837 | 2011-02-11 15:39:28 +0100 | [diff] [blame] | 727 | break; |
Alan Cox | d3b5cff | 2009-09-19 13:13:26 -0700 | [diff] [blame] | 728 | } |
| 729 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | /* |
| 731 | * wait until the specified VT has been activated |
| 732 | */ |
| 733 | case VT_WAITACTIVE: |
| 734 | if (!perm) |
Alan Cox | 4001d7b | 2012-03-02 14:59:20 +0000 | [diff] [blame] | 735 | return -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | if (arg == 0 || arg > MAX_NR_CONSOLES) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 737 | ret = -ENXIO; |
Alan Cox | 99cceb4e | 2012-03-02 14:59:49 +0000 | [diff] [blame] | 738 | else |
Alan Cox | 8b92e87 | 2009-09-19 13:13:24 -0700 | [diff] [blame] | 739 | ret = vt_waitactive(arg); |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 740 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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) |
Alan Cox | 4001d7b | 2012-03-02 14:59:20 +0000 | [diff] [blame] | 754 | return -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | |
Alan Cox | 4001d7b | 2012-03-02 14:59:20 +0000 | [diff] [blame] | 756 | console_lock(); |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 757 | if (vc->vt_mode.mode != VT_PROCESS) { |
Alan Cox | 4001d7b | 2012-03-02 14:59:20 +0000 | [diff] [blame] | 758 | console_unlock(); |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 759 | ret = -EINVAL; |
| 760 | break; |
| 761 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | newvt = vc->vt_newvt; |
| 780 | vc->vt_newvt = -1; |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 781 | ret = vc_allocate(newvt); |
| 782 | if (ret) { |
Torben Hohn | ac751ef | 2011-01-25 15:07:35 -0800 | [diff] [blame] | 783 | console_unlock(); |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 784 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | } |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 793 | } else { |
| 794 | /* |
| 795 | * Switched-to response |
| 796 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | /* |
| 798 | * If it's just an ACK, ignore it |
| 799 | */ |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 800 | if (arg != VT_ACKACQ) |
| 801 | ret = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | } |
Torben Hohn | ac751ef | 2011-01-25 15:07:35 -0800 | [diff] [blame] | 803 | console_unlock(); |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 804 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | |
| 806 | /* |
| 807 | * Disallocate memory associated to VT (but leave VT1) |
| 808 | */ |
| 809 | case VT_DISALLOCATE: |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 810 | if (arg > MAX_NR_CONSOLES) { |
| 811 | ret = -ENXIO; |
| 812 | break; |
| 813 | } |
Peter Hurley | 421b40a | 2013-05-17 12:41:03 -0400 | [diff] [blame] | 814 | if (arg == 0) |
| 815 | vt_disallocate_all(); |
| 816 | else |
| 817 | ret = vt_disallocate(--arg); |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 818 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | |
| 820 | case VT_RESIZE: |
| 821 | { |
| 822 | struct vt_sizes __user *vtsizes = up; |
Antonino A. Daplas | e400b6e | 2007-10-16 01:29:35 -0700 | [diff] [blame] | 823 | struct vc_data *vc; |
| 824 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 825 | ushort ll,cc; |
| 826 | if (!perm) |
Alan Cox | 4001d7b | 2012-03-02 14:59:20 +0000 | [diff] [blame] | 827 | return -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | if (get_user(ll, &vtsizes->v_rows) || |
| 829 | get_user(cc, &vtsizes->v_cols)) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 830 | ret = -EFAULT; |
| 831 | else { |
Torben Hohn | ac751ef | 2011-01-25 15:07:35 -0800 | [diff] [blame] | 832 | console_lock(); |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 833 | for (i = 0; i < MAX_NR_CONSOLES; i++) { |
| 834 | vc = vc_cons[i].d; |
Antonino A. Daplas | e400b6e | 2007-10-16 01:29:35 -0700 | [diff] [blame] | 835 | |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 836 | if (vc) { |
| 837 | vc->vc_resize_user = 1; |
Alan Cox | 4001d7b | 2012-03-02 14:59:20 +0000 | [diff] [blame] | 838 | /* FIXME: review v tty lock */ |
Alan Cox | 8c9a9dd | 2008-08-15 10:39:38 +0100 | [diff] [blame] | 839 | vc_resize(vc_cons[i].d, cc, ll); |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 840 | } |
Antonino A. Daplas | e400b6e | 2007-10-16 01:29:35 -0700 | [diff] [blame] | 841 | } |
Torben Hohn | ac751ef | 2011-01-25 15:07:35 -0800 | [diff] [blame] | 842 | console_unlock(); |
Antonino A. Daplas | e400b6e | 2007-10-16 01:29:35 -0700 | [diff] [blame] | 843 | } |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 844 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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) |
Alan Cox | 4001d7b | 2012-03-02 14:59:20 +0000 | [diff] [blame] | 852 | return -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | if (!access_ok(VERIFY_READ, vtconsize, |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 854 | sizeof(struct vt_consize))) { |
| 855 | ret = -EFAULT; |
| 856 | break; |
| 857 | } |
| 858 | /* FIXME: Should check the copies properly */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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) { |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 868 | if (ll != vlin/clin) { |
| 869 | /* Parameters don't add up */ |
| 870 | ret = -EINVAL; |
| 871 | break; |
| 872 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 873 | } else |
| 874 | ll = vlin/clin; |
| 875 | } |
| 876 | if (vcol && ccol) { |
| 877 | if (cc) { |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 878 | if (cc != vcol/ccol) { |
| 879 | ret = -EINVAL; |
| 880 | break; |
| 881 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 882 | } else |
| 883 | cc = vcol/ccol; |
| 884 | } |
| 885 | |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 886 | if (clin > 32) { |
| 887 | ret = -EINVAL; |
| 888 | break; |
| 889 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | |
| 891 | for (i = 0; i < MAX_NR_CONSOLES; i++) { |
| 892 | if (!vc_cons[i].d) |
| 893 | continue; |
Torben Hohn | ac751ef | 2011-01-25 15:07:35 -0800 | [diff] [blame] | 894 | console_lock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | if (vlin) |
| 896 | vc_cons[i].d->vc_scan_lines = vlin; |
| 897 | if (clin) |
| 898 | vc_cons[i].d->vc_font.height = clin; |
Antonino A. Daplas | e400b6e | 2007-10-16 01:29:35 -0700 | [diff] [blame] | 899 | vc_cons[i].d->vc_resize_user = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 900 | vc_resize(vc_cons[i].d, cc, ll); |
Torben Hohn | ac751ef | 2011-01-25 15:07:35 -0800 | [diff] [blame] | 901 | console_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 902 | } |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 903 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | } |
| 905 | |
| 906 | case PIO_FONT: { |
| 907 | if (!perm) |
Alan Cox | 4001d7b | 2012-03-02 14:59:20 +0000 | [diff] [blame] | 908 | return -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 915 | ret = con_font_op(vc_cons[fg_console].d, &op); |
| 916 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 926 | ret = con_font_op(vc_cons[fg_console].d, &op); |
| 927 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 928 | } |
| 929 | |
| 930 | case PIO_CMAP: |
| 931 | if (!perm) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 932 | ret = -EPERM; |
| 933 | else |
| 934 | ret = con_set_cmap(up); |
| 935 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | |
| 937 | case GIO_CMAP: |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 938 | ret = con_get_cmap(up); |
| 939 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 940 | |
| 941 | case PIO_FONTX: |
| 942 | case GIO_FONTX: |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 943 | ret = do_fontx_ioctl(cmd, up, perm, &op); |
| 944 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | |
| 946 | case PIO_FONTRESET: |
| 947 | { |
| 948 | if (!perm) |
Alan Cox | 4001d7b | 2012-03-02 14:59:20 +0000 | [diff] [blame] | 949 | return -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 950 | |
| 951 | #ifdef BROKEN_GRAPHICS_PROGRAMS |
| 952 | /* With BROKEN_GRAPHICS_PROGRAMS defined, the default |
| 953 | font is not saved. */ |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 954 | ret = -ENOSYS; |
| 955 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 956 | #else |
| 957 | { |
| 958 | op.op = KD_FONT_OP_SET_DEFAULT; |
| 959 | op.data = NULL; |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 960 | ret = con_font_op(vc_cons[fg_console].d, &op); |
| 961 | if (ret) |
| 962 | break; |
Alan Cox | 5d1a33f | 2012-04-24 11:06:06 +0100 | [diff] [blame] | 963 | console_lock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 964 | con_set_default_unimap(vc_cons[fg_console].d); |
Alan Cox | 5d1a33f | 2012-04-24 11:06:06 +0100 | [diff] [blame] | 965 | console_unlock(); |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 966 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | } |
| 968 | #endif |
| 969 | } |
| 970 | |
| 971 | case KDFONTOP: { |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 972 | if (copy_from_user(&op, up, sizeof(op))) { |
| 973 | ret = -EFAULT; |
| 974 | break; |
| 975 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 976 | if (!perm && op.op != KD_FONT_OP_GET) |
Alan Cox | 4001d7b | 2012-03-02 14:59:20 +0000 | [diff] [blame] | 977 | return -EPERM; |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 978 | ret = con_font_op(vc, &op); |
| 979 | if (ret) |
| 980 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 981 | if (copy_to_user(up, &op, sizeof(op))) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 982 | ret = -EFAULT; |
| 983 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 984 | } |
| 985 | |
| 986 | case PIO_SCRNMAP: |
| 987 | if (!perm) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 988 | ret = -EPERM; |
Alan Cox | 5d1a33f | 2012-04-24 11:06:06 +0100 | [diff] [blame] | 989 | else |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 990 | ret = con_set_trans_old(up); |
| 991 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | |
| 993 | case GIO_SCRNMAP: |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 994 | ret = con_get_trans_old(up); |
| 995 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 996 | |
| 997 | case PIO_UNISCRNMAP: |
| 998 | if (!perm) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 999 | ret = -EPERM; |
Alan Cox | 5d1a33f | 2012-04-24 11:06:06 +0100 | [diff] [blame] | 1000 | else |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 1001 | ret = con_set_trans_new(up); |
| 1002 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1003 | |
| 1004 | case GIO_UNISCRNMAP: |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 1005 | ret = con_get_trans_new(up); |
| 1006 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | |
| 1008 | case PIO_UNIMAPCLR: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | if (!perm) |
Alan Cox | 4001d7b | 2012-03-02 14:59:20 +0000 | [diff] [blame] | 1010 | return -EPERM; |
Jiri Slaby | f8b0c2e | 2016-06-23 13:34:36 +0200 | [diff] [blame] | 1011 | con_clear_unimap(vc); |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 1012 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | |
| 1014 | case PIO_UNIMAP: |
| 1015 | case GIO_UNIMAP: |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 1016 | ret = do_unimap_ioctl(cmd, up, perm, vc); |
| 1017 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1018 | |
| 1019 | case VT_LOCKSWITCH: |
| 1020 | if (!capable(CAP_SYS_TTY_CONFIG)) |
Alan Cox | 4001d7b | 2012-03-02 14:59:20 +0000 | [diff] [blame] | 1021 | return -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1022 | vt_dont_switch = 1; |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 1023 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1024 | case VT_UNLOCKSWITCH: |
| 1025 | if (!capable(CAP_SYS_TTY_CONFIG)) |
Alan Cox | 4001d7b | 2012-03-02 14:59:20 +0000 | [diff] [blame] | 1026 | return -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1027 | vt_dont_switch = 0; |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 1028 | break; |
Samuel Thibault | 533475d | 2006-08-27 01:23:39 -0700 | [diff] [blame] | 1029 | case VT_GETHIFONTMASK: |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 1030 | ret = put_user(vc->vc_hi_font_mask, |
| 1031 | (unsigned short __user *)arg); |
| 1032 | break; |
Alan Cox | 8b92e87 | 2009-09-19 13:13:24 -0700 | [diff] [blame] | 1033 | case VT_WAITEVENT: |
| 1034 | ret = vt_event_wait_ioctl((struct vt_event __user *)arg); |
| 1035 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1036 | default: |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 1037 | ret = -ENOIOCTLCMD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1038 | } |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 1039 | out: |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 1040 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1041 | } |
| 1042 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | void reset_vc(struct vc_data *vc) |
| 1044 | { |
| 1045 | vc->vc_mode = KD_TEXT; |
Alan Cox | 079c953 | 2012-02-28 14:49:23 +0000 | [diff] [blame] | 1046 | vt_reset_unicode(vc->vc_num); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | vc->vt_mode.mode = VT_AUTO; |
| 1048 | vc->vt_mode.waitv = 0; |
| 1049 | vc->vt_mode.relsig = 0; |
| 1050 | vc->vt_mode.acqsig = 0; |
| 1051 | vc->vt_mode.frsig = 0; |
Eric W. Biederman | 8b6312f | 2007-02-10 01:44:34 -0800 | [diff] [blame] | 1052 | put_pid(vc->vt_pid); |
| 1053 | vc->vt_pid = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1054 | vc->vt_newvt = -1; |
| 1055 | if (!in_interrupt()) /* Via keyboard.c:SAK() - akpm */ |
| 1056 | reset_palette(vc); |
| 1057 | } |
| 1058 | |
Eric W. Biederman | 8b6312f | 2007-02-10 01:44:34 -0800 | [diff] [blame] | 1059 | void vc_SAK(struct work_struct *work) |
| 1060 | { |
| 1061 | struct vc *vc_con = |
| 1062 | container_of(work, struct vc, SAK_work); |
| 1063 | struct vc_data *vc; |
| 1064 | struct tty_struct *tty; |
| 1065 | |
Torben Hohn | ac751ef | 2011-01-25 15:07:35 -0800 | [diff] [blame] | 1066 | console_lock(); |
Eric W. Biederman | 8b6312f | 2007-02-10 01:44:34 -0800 | [diff] [blame] | 1067 | vc = vc_con->d; |
| 1068 | if (vc) { |
Alan Cox | 079c953 | 2012-02-28 14:49:23 +0000 | [diff] [blame] | 1069 | /* FIXME: review tty ref counting */ |
Alan Cox | 8ce7326 | 2010-06-01 22:52:56 +0200 | [diff] [blame] | 1070 | tty = vc->port.tty; |
Eric W. Biederman | 8b6312f | 2007-02-10 01:44:34 -0800 | [diff] [blame] | 1071 | /* |
| 1072 | * SAK should also work in all raw modes and reset |
| 1073 | * them properly. |
| 1074 | */ |
| 1075 | if (tty) |
| 1076 | __do_SAK(tty); |
| 1077 | reset_vc(vc); |
| 1078 | } |
Torben Hohn | ac751ef | 2011-01-25 15:07:35 -0800 | [diff] [blame] | 1079 | console_unlock(); |
Eric W. Biederman | 8b6312f | 2007-02-10 01:44:34 -0800 | [diff] [blame] | 1080 | } |
| 1081 | |
Arnd Bergmann | e921665 | 2009-08-06 15:09:28 +0200 | [diff] [blame] | 1082 | #ifdef CONFIG_COMPAT |
| 1083 | |
| 1084 | struct compat_consolefontdesc { |
| 1085 | unsigned short charcount; /* characters in font (256 or 512) */ |
| 1086 | unsigned short charheight; /* scan lines per character (1-32) */ |
| 1087 | compat_caddr_t chardata; /* font data in expanded form */ |
| 1088 | }; |
| 1089 | |
| 1090 | static inline int |
| 1091 | compat_fontx_ioctl(int cmd, struct compat_consolefontdesc __user *user_cfd, |
| 1092 | int perm, struct console_font_op *op) |
| 1093 | { |
| 1094 | struct compat_consolefontdesc cfdarg; |
| 1095 | int i; |
| 1096 | |
| 1097 | if (copy_from_user(&cfdarg, user_cfd, sizeof(struct compat_consolefontdesc))) |
| 1098 | return -EFAULT; |
| 1099 | |
| 1100 | switch (cmd) { |
| 1101 | case PIO_FONTX: |
| 1102 | if (!perm) |
| 1103 | return -EPERM; |
| 1104 | op->op = KD_FONT_OP_SET; |
| 1105 | op->flags = KD_FONT_FLAG_OLD; |
| 1106 | op->width = 8; |
| 1107 | op->height = cfdarg.charheight; |
| 1108 | op->charcount = cfdarg.charcount; |
| 1109 | op->data = compat_ptr(cfdarg.chardata); |
| 1110 | return con_font_op(vc_cons[fg_console].d, op); |
| 1111 | case GIO_FONTX: |
| 1112 | op->op = KD_FONT_OP_GET; |
| 1113 | op->flags = KD_FONT_FLAG_OLD; |
| 1114 | op->width = 8; |
| 1115 | op->height = cfdarg.charheight; |
| 1116 | op->charcount = cfdarg.charcount; |
| 1117 | op->data = compat_ptr(cfdarg.chardata); |
| 1118 | i = con_font_op(vc_cons[fg_console].d, op); |
| 1119 | if (i) |
| 1120 | return i; |
| 1121 | cfdarg.charheight = op->height; |
| 1122 | cfdarg.charcount = op->charcount; |
| 1123 | if (copy_to_user(user_cfd, &cfdarg, sizeof(struct compat_consolefontdesc))) |
| 1124 | return -EFAULT; |
| 1125 | return 0; |
| 1126 | } |
| 1127 | return -EINVAL; |
| 1128 | } |
| 1129 | |
| 1130 | struct compat_console_font_op { |
| 1131 | compat_uint_t op; /* operation code KD_FONT_OP_* */ |
| 1132 | compat_uint_t flags; /* KD_FONT_FLAG_* */ |
| 1133 | compat_uint_t width, height; /* font size */ |
| 1134 | compat_uint_t charcount; |
| 1135 | compat_caddr_t data; /* font data with height fixed to 32 */ |
| 1136 | }; |
| 1137 | |
| 1138 | static inline int |
| 1139 | compat_kdfontop_ioctl(struct compat_console_font_op __user *fontop, |
| 1140 | int perm, struct console_font_op *op, struct vc_data *vc) |
| 1141 | { |
| 1142 | int i; |
| 1143 | |
| 1144 | if (copy_from_user(op, fontop, sizeof(struct compat_console_font_op))) |
| 1145 | return -EFAULT; |
| 1146 | if (!perm && op->op != KD_FONT_OP_GET) |
| 1147 | return -EPERM; |
| 1148 | op->data = compat_ptr(((struct compat_console_font_op *)op)->data); |
Arnd Bergmann | e921665 | 2009-08-06 15:09:28 +0200 | [diff] [blame] | 1149 | i = con_font_op(vc, op); |
| 1150 | if (i) |
| 1151 | return i; |
| 1152 | ((struct compat_console_font_op *)op)->data = (unsigned long)op->data; |
| 1153 | if (copy_to_user(fontop, op, sizeof(struct compat_console_font_op))) |
| 1154 | return -EFAULT; |
| 1155 | return 0; |
| 1156 | } |
| 1157 | |
| 1158 | struct compat_unimapdesc { |
| 1159 | unsigned short entry_ct; |
| 1160 | compat_caddr_t entries; |
| 1161 | }; |
| 1162 | |
| 1163 | static inline int |
| 1164 | compat_unimap_ioctl(unsigned int cmd, struct compat_unimapdesc __user *user_ud, |
| 1165 | int perm, struct vc_data *vc) |
| 1166 | { |
| 1167 | struct compat_unimapdesc tmp; |
| 1168 | struct unipair __user *tmp_entries; |
| 1169 | |
| 1170 | if (copy_from_user(&tmp, user_ud, sizeof tmp)) |
| 1171 | return -EFAULT; |
| 1172 | tmp_entries = compat_ptr(tmp.entries); |
| 1173 | if (tmp_entries) |
| 1174 | if (!access_ok(VERIFY_WRITE, tmp_entries, |
| 1175 | tmp.entry_ct*sizeof(struct unipair))) |
| 1176 | return -EFAULT; |
| 1177 | switch (cmd) { |
| 1178 | case PIO_UNIMAP: |
| 1179 | if (!perm) |
| 1180 | return -EPERM; |
| 1181 | return con_set_unimap(vc, tmp.entry_ct, tmp_entries); |
| 1182 | case GIO_UNIMAP: |
| 1183 | if (!perm && fg_console != vc->vc_num) |
| 1184 | return -EPERM; |
| 1185 | return con_get_unimap(vc, tmp.entry_ct, &(user_ud->entry_ct), tmp_entries); |
| 1186 | } |
| 1187 | return 0; |
| 1188 | } |
| 1189 | |
Alan Cox | 6caa76b | 2011-02-14 16:27:22 +0000 | [diff] [blame] | 1190 | long vt_compat_ioctl(struct tty_struct *tty, |
Arnd Bergmann | e921665 | 2009-08-06 15:09:28 +0200 | [diff] [blame] | 1191 | unsigned int cmd, unsigned long arg) |
| 1192 | { |
| 1193 | struct vc_data *vc = tty->driver_data; |
| 1194 | struct console_font_op op; /* used in multiple places here */ |
Arnd Bergmann | e921665 | 2009-08-06 15:09:28 +0200 | [diff] [blame] | 1195 | unsigned int console; |
| 1196 | void __user *up = (void __user *)arg; |
| 1197 | int perm; |
| 1198 | int ret = 0; |
| 1199 | |
| 1200 | console = vc->vc_num; |
| 1201 | |
Arnd Bergmann | e921665 | 2009-08-06 15:09:28 +0200 | [diff] [blame] | 1202 | if (!vc_cons_allocated(console)) { /* impossible? */ |
| 1203 | ret = -ENOIOCTLCMD; |
| 1204 | goto out; |
| 1205 | } |
| 1206 | |
| 1207 | /* |
| 1208 | * To have permissions to do most of the vt ioctls, we either have |
| 1209 | * to be the owner of the tty, or have CAP_SYS_TTY_CONFIG. |
| 1210 | */ |
| 1211 | perm = 0; |
| 1212 | if (current->signal->tty == tty || capable(CAP_SYS_TTY_CONFIG)) |
| 1213 | perm = 1; |
| 1214 | |
Arnd Bergmann | e921665 | 2009-08-06 15:09:28 +0200 | [diff] [blame] | 1215 | switch (cmd) { |
| 1216 | /* |
| 1217 | * these need special handlers for incompatible data structures |
| 1218 | */ |
| 1219 | case PIO_FONTX: |
| 1220 | case GIO_FONTX: |
| 1221 | ret = compat_fontx_ioctl(cmd, up, perm, &op); |
| 1222 | break; |
| 1223 | |
| 1224 | case KDFONTOP: |
| 1225 | ret = compat_kdfontop_ioctl(up, perm, &op, vc); |
| 1226 | break; |
| 1227 | |
| 1228 | case PIO_UNIMAP: |
| 1229 | case GIO_UNIMAP: |
Andreas Schwab | 4b1fe77 | 2009-09-28 20:10:02 +0200 | [diff] [blame] | 1230 | ret = compat_unimap_ioctl(cmd, up, perm, vc); |
Arnd Bergmann | e921665 | 2009-08-06 15:09:28 +0200 | [diff] [blame] | 1231 | break; |
| 1232 | |
| 1233 | /* |
| 1234 | * all these treat 'arg' as an integer |
| 1235 | */ |
| 1236 | case KIOCSOUND: |
| 1237 | case KDMKTONE: |
| 1238 | #ifdef CONFIG_X86 |
| 1239 | case KDADDIO: |
| 1240 | case KDDELIO: |
| 1241 | #endif |
| 1242 | case KDSETMODE: |
| 1243 | case KDMAPDISP: |
| 1244 | case KDUNMAPDISP: |
| 1245 | case KDSKBMODE: |
| 1246 | case KDSKBMETA: |
| 1247 | case KDSKBLED: |
| 1248 | case KDSETLED: |
| 1249 | case KDSIGACCEPT: |
| 1250 | case VT_ACTIVATE: |
| 1251 | case VT_WAITACTIVE: |
| 1252 | case VT_RELDISP: |
| 1253 | case VT_DISALLOCATE: |
| 1254 | case VT_RESIZE: |
| 1255 | case VT_RESIZEX: |
| 1256 | goto fallback; |
| 1257 | |
| 1258 | /* |
| 1259 | * the rest has a compatible data structure behind arg, |
| 1260 | * but we have to convert it to a proper 64 bit pointer. |
| 1261 | */ |
| 1262 | default: |
| 1263 | arg = (unsigned long)compat_ptr(arg); |
| 1264 | goto fallback; |
| 1265 | } |
| 1266 | out: |
Arnd Bergmann | e921665 | 2009-08-06 15:09:28 +0200 | [diff] [blame] | 1267 | return ret; |
| 1268 | |
| 1269 | fallback: |
Alan Cox | 6caa76b | 2011-02-14 16:27:22 +0000 | [diff] [blame] | 1270 | return vt_ioctl(tty, cmd, arg); |
Arnd Bergmann | e921665 | 2009-08-06 15:09:28 +0200 | [diff] [blame] | 1271 | } |
| 1272 | |
| 1273 | |
| 1274 | #endif /* CONFIG_COMPAT */ |
| 1275 | |
| 1276 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1277 | /* |
Alan Cox | d3b5cff | 2009-09-19 13:13:26 -0700 | [diff] [blame] | 1278 | * Performs the back end of a vt switch. Called under the console |
| 1279 | * semaphore. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1280 | */ |
| 1281 | static void complete_change_console(struct vc_data *vc) |
| 1282 | { |
| 1283 | unsigned char old_vc_mode; |
Alan Cox | 8b92e87 | 2009-09-19 13:13:24 -0700 | [diff] [blame] | 1284 | int old = fg_console; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1285 | |
| 1286 | last_console = fg_console; |
| 1287 | |
| 1288 | /* |
| 1289 | * If we're switching, we could be going from KD_GRAPHICS to |
| 1290 | * KD_TEXT mode or vice versa, which means we need to blank or |
| 1291 | * unblank the screen later. |
| 1292 | */ |
| 1293 | old_vc_mode = vc_cons[fg_console].d->vc_mode; |
| 1294 | switch_screen(vc); |
| 1295 | |
| 1296 | /* |
Eric W. Biederman | 3dfcaf16 | 2006-12-13 00:34:05 -0800 | [diff] [blame] | 1297 | * This can't appear below a successful kill_pid(). If it did, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1298 | * then the *blank_screen operation could occur while X, having |
| 1299 | * received acqsig, is waking up on another processor. This |
| 1300 | * condition can lead to overlapping accesses to the VGA range |
| 1301 | * and the framebuffer (causing system lockups). |
| 1302 | * |
| 1303 | * To account for this we duplicate this code below only if the |
| 1304 | * controlling process is gone and we've called reset_vc. |
| 1305 | */ |
| 1306 | if (old_vc_mode != vc->vc_mode) { |
| 1307 | if (vc->vc_mode == KD_TEXT) |
| 1308 | do_unblank_screen(1); |
| 1309 | else |
| 1310 | do_blank_screen(1); |
| 1311 | } |
| 1312 | |
| 1313 | /* |
| 1314 | * If this new console is under process control, send it a signal |
| 1315 | * telling it that it has acquired. Also check if it has died and |
| 1316 | * clean up (similar to logic employed in change_console()) |
| 1317 | */ |
Greg Kroah-Hartman | 87a6aca | 2010-03-15 17:14:15 -0700 | [diff] [blame] | 1318 | if (vc->vt_mode.mode == VT_PROCESS) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1319 | /* |
Eric W. Biederman | 3dfcaf16 | 2006-12-13 00:34:05 -0800 | [diff] [blame] | 1320 | * Send the signal as privileged - kill_pid() will |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1321 | * tell us if the process has gone or something else |
| 1322 | * is awry |
| 1323 | */ |
Eric W. Biederman | bde0d2c | 2006-10-02 02:17:14 -0700 | [diff] [blame] | 1324 | if (kill_pid(vc->vt_pid, vc->vt_mode.acqsig, 1) != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1325 | /* |
| 1326 | * The controlling process has died, so we revert back to |
| 1327 | * normal operation. In this case, we'll also change back |
| 1328 | * to KD_TEXT mode. I'm not sure if this is strictly correct |
| 1329 | * but it saves the agony when the X server dies and the screen |
| 1330 | * remains blanked due to KD_GRAPHICS! It would be nice to do |
| 1331 | * this outside of VT_PROCESS but there is no single process |
| 1332 | * to account for and tracking tty count may be undesirable. |
| 1333 | */ |
| 1334 | reset_vc(vc); |
| 1335 | |
| 1336 | if (old_vc_mode != vc->vc_mode) { |
| 1337 | if (vc->vc_mode == KD_TEXT) |
| 1338 | do_unblank_screen(1); |
| 1339 | else |
| 1340 | do_blank_screen(1); |
| 1341 | } |
| 1342 | } |
| 1343 | } |
| 1344 | |
| 1345 | /* |
| 1346 | * Wake anyone waiting for their VT to activate |
| 1347 | */ |
Alan Cox | 8b92e87 | 2009-09-19 13:13:24 -0700 | [diff] [blame] | 1348 | vt_event_post(VT_EVENT_SWITCH, old, vc->vc_num); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1349 | return; |
| 1350 | } |
| 1351 | |
| 1352 | /* |
| 1353 | * Performs the front-end of a vt switch |
| 1354 | */ |
| 1355 | void change_console(struct vc_data *new_vc) |
| 1356 | { |
| 1357 | struct vc_data *vc; |
| 1358 | |
| 1359 | if (!new_vc || new_vc->vc_num == fg_console || vt_dont_switch) |
| 1360 | return; |
| 1361 | |
| 1362 | /* |
| 1363 | * If this vt is in process mode, then we need to handshake with |
| 1364 | * that process before switching. Essentially, we store where that |
| 1365 | * vt wants to switch to and wait for it to tell us when it's done |
| 1366 | * (via VT_RELDISP ioctl). |
| 1367 | * |
| 1368 | * We also check to see if the controlling process still exists. |
| 1369 | * If it doesn't, we reset this vt to auto mode and continue. |
| 1370 | * This is a cheap way to track process control. The worst thing |
| 1371 | * that can happen is: we send a signal to a process, it dies, and |
| 1372 | * the switch gets "lost" waiting for a response; hopefully, the |
| 1373 | * user will try again, we'll detect the process is gone (unless |
| 1374 | * the user waits just the right amount of time :-) and revert the |
| 1375 | * vt to auto control. |
| 1376 | */ |
| 1377 | vc = vc_cons[fg_console].d; |
Greg Kroah-Hartman | 87a6aca | 2010-03-15 17:14:15 -0700 | [diff] [blame] | 1378 | if (vc->vt_mode.mode == VT_PROCESS) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1379 | /* |
Eric W. Biederman | 3dfcaf16 | 2006-12-13 00:34:05 -0800 | [diff] [blame] | 1380 | * Send the signal as privileged - kill_pid() will |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1381 | * tell us if the process has gone or something else |
Jan Lübbe | a64314e | 2007-09-29 18:47:51 +0200 | [diff] [blame] | 1382 | * is awry. |
| 1383 | * |
| 1384 | * We need to set vt_newvt *before* sending the signal or we |
| 1385 | * have a race. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1386 | */ |
Jan Lübbe | a64314e | 2007-09-29 18:47:51 +0200 | [diff] [blame] | 1387 | vc->vt_newvt = new_vc->vc_num; |
Eric W. Biederman | bde0d2c | 2006-10-02 02:17:14 -0700 | [diff] [blame] | 1388 | if (kill_pid(vc->vt_pid, vc->vt_mode.relsig, 1) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1389 | /* |
Greg Kroah-Hartman | 87a6aca | 2010-03-15 17:14:15 -0700 | [diff] [blame] | 1390 | * It worked. Mark the vt to switch to and |
| 1391 | * return. The process needs to send us a |
| 1392 | * VT_RELDISP ioctl to complete the switch. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1393 | */ |
Greg Kroah-Hartman | 87a6aca | 2010-03-15 17:14:15 -0700 | [diff] [blame] | 1394 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1395 | } |
| 1396 | |
| 1397 | /* |
Greg Kroah-Hartman | 87a6aca | 2010-03-15 17:14:15 -0700 | [diff] [blame] | 1398 | * The controlling process has died, so we revert back to |
| 1399 | * normal operation. In this case, we'll also change back |
| 1400 | * to KD_TEXT mode. I'm not sure if this is strictly correct |
| 1401 | * but it saves the agony when the X server dies and the screen |
| 1402 | * remains blanked due to KD_GRAPHICS! It would be nice to do |
| 1403 | * this outside of VT_PROCESS but there is no single process |
| 1404 | * to account for and tracking tty count may be undesirable. |
| 1405 | */ |
| 1406 | reset_vc(vc); |
| 1407 | |
| 1408 | /* |
| 1409 | * Fall through to normal (VT_AUTO) handling of the switch... |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1410 | */ |
| 1411 | } |
| 1412 | |
| 1413 | /* |
| 1414 | * Ignore all switches in KD_GRAPHICS+VT_AUTO mode |
| 1415 | */ |
| 1416 | if (vc->vc_mode == KD_GRAPHICS) |
| 1417 | return; |
| 1418 | |
| 1419 | complete_change_console(new_vc); |
| 1420 | } |
Alan Cox | 8d23355 | 2009-09-19 13:13:25 -0700 | [diff] [blame] | 1421 | |
| 1422 | /* Perform a kernel triggered VT switch for suspend/resume */ |
| 1423 | |
| 1424 | static int disable_vt_switch; |
| 1425 | |
| 1426 | int vt_move_to_console(unsigned int vt, int alloc) |
| 1427 | { |
| 1428 | int prev; |
| 1429 | |
Torben Hohn | ac751ef | 2011-01-25 15:07:35 -0800 | [diff] [blame] | 1430 | console_lock(); |
Alan Cox | 8d23355 | 2009-09-19 13:13:25 -0700 | [diff] [blame] | 1431 | /* Graphics mode - up to X */ |
| 1432 | if (disable_vt_switch) { |
Torben Hohn | ac751ef | 2011-01-25 15:07:35 -0800 | [diff] [blame] | 1433 | console_unlock(); |
Alan Cox | 8d23355 | 2009-09-19 13:13:25 -0700 | [diff] [blame] | 1434 | return 0; |
| 1435 | } |
| 1436 | prev = fg_console; |
| 1437 | |
| 1438 | if (alloc && vc_allocate(vt)) { |
| 1439 | /* we can't have a free VC for now. Too bad, |
| 1440 | * we don't want to mess the screen for now. */ |
Torben Hohn | ac751ef | 2011-01-25 15:07:35 -0800 | [diff] [blame] | 1441 | console_unlock(); |
Alan Cox | 8d23355 | 2009-09-19 13:13:25 -0700 | [diff] [blame] | 1442 | return -ENOSPC; |
| 1443 | } |
| 1444 | |
| 1445 | if (set_console(vt)) { |
| 1446 | /* |
| 1447 | * We're unable to switch to the SUSPEND_CONSOLE. |
| 1448 | * Let the calling function know so it can decide |
| 1449 | * what to do. |
| 1450 | */ |
Torben Hohn | ac751ef | 2011-01-25 15:07:35 -0800 | [diff] [blame] | 1451 | console_unlock(); |
Alan Cox | 8d23355 | 2009-09-19 13:13:25 -0700 | [diff] [blame] | 1452 | return -EIO; |
| 1453 | } |
Torben Hohn | ac751ef | 2011-01-25 15:07:35 -0800 | [diff] [blame] | 1454 | console_unlock(); |
Jiri Slaby | 797938b | 2009-08-11 23:20:41 +0200 | [diff] [blame] | 1455 | if (vt_waitactive(vt + 1)) { |
Alan Cox | 8d23355 | 2009-09-19 13:13:25 -0700 | [diff] [blame] | 1456 | pr_debug("Suspend: Can't switch VCs."); |
| 1457 | return -EINTR; |
| 1458 | } |
| 1459 | return prev; |
| 1460 | } |
| 1461 | |
| 1462 | /* |
| 1463 | * Normally during a suspend, we allocate a new console and switch to it. |
| 1464 | * When we resume, we switch back to the original console. This switch |
| 1465 | * can be slow, so on systems where the framebuffer can handle restoration |
| 1466 | * of video registers anyways, there's little point in doing the console |
| 1467 | * switch. This function allows you to disable it by passing it '0'. |
| 1468 | */ |
| 1469 | void pm_set_vt_switch(int do_switch) |
| 1470 | { |
Torben Hohn | ac751ef | 2011-01-25 15:07:35 -0800 | [diff] [blame] | 1471 | console_lock(); |
Alan Cox | 8d23355 | 2009-09-19 13:13:25 -0700 | [diff] [blame] | 1472 | disable_vt_switch = !do_switch; |
Torben Hohn | ac751ef | 2011-01-25 15:07:35 -0800 | [diff] [blame] | 1473 | console_unlock(); |
Alan Cox | 8d23355 | 2009-09-19 13:13:25 -0700 | [diff] [blame] | 1474 | } |
| 1475 | EXPORT_SYMBOL(pm_set_vt_switch); |