#include <linux/tty.h>
#include <linux/timer.h>
#include <linux/kernel.h>
+#include <linux/compat.h>
+#include <linux/module.h>
#include <linux/kd.h>
#include <linux/vt.h>
#include <linux/string.h>
#include <linux/major.h>
#include <linux/fs.h>
#include <linux/console.h>
+#include <linux/consolemap.h>
#include <linux/signal.h>
+#include <linux/smp_lock.h>
#include <linux/timex.h>
#include <asm/io.h>
static void complete_change_console(struct vc_data *vc);
/*
+ * User space VT_EVENT handlers
+ */
+
+struct vt_event_wait {
+ struct list_head list;
+ struct vt_event event;
+ int done;
+};
+
+static LIST_HEAD(vt_events);
+static DEFINE_SPINLOCK(vt_event_lock);
+static DECLARE_WAIT_QUEUE_HEAD(vt_event_waitqueue);
+
+/**
+ * vt_event_post
+ * @event: the event that occurred
+ * @old: old console
+ * @new: new console
+ *
+ * Post an VT event to interested VT handlers
+ */
+
+void vt_event_post(unsigned int event, unsigned int old, unsigned int new)
+{
+ struct list_head *pos, *head;
+ unsigned long flags;
+ int wake = 0;
+
+ spin_lock_irqsave(&vt_event_lock, flags);
+ head = &vt_events;
+
+ list_for_each(pos, head) {
+ struct vt_event_wait *ve = list_entry(pos,
+ struct vt_event_wait, list);
+ if (!(ve->event.event & event))
+ continue;
+ ve->event.event = event;
+ /* kernel view is consoles 0..n-1, user space view is
+ console 1..n with 0 meaning current, so we must bias */
+ ve->event.old = old + 1;
+ ve->event.new = new + 1;
+ wake = 1;
+ ve->done = 1;
+ }
+ spin_unlock_irqrestore(&vt_event_lock, flags);
+ if (wake)
+ wake_up_interruptible(&vt_event_waitqueue);
+}
+
+/**
+ * vt_event_wait - wait for an event
+ * @vw: our event
+ *
+ * Waits for an event to occur which completes our vt_event_wait
+ * structure. On return the structure has wv->done set to 1 for success
+ * or 0 if some event such as a signal ended the wait.
+ */
+
+static void vt_event_wait(struct vt_event_wait *vw)
+{
+ unsigned long flags;
+ /* Prepare the event */
+ INIT_LIST_HEAD(&vw->list);
+ vw->done = 0;
+ /* Queue our event */
+ spin_lock_irqsave(&vt_event_lock, flags);
+ list_add(&vw->list, &vt_events);
+ spin_unlock_irqrestore(&vt_event_lock, flags);
+ /* Wait for it to pass */
+ wait_event_interruptible(vt_event_waitqueue, vw->done);
+ /* Dequeue it */
+ spin_lock_irqsave(&vt_event_lock, flags);
+ list_del(&vw->list);
+ spin_unlock_irqrestore(&vt_event_lock, flags);
+}
+
+/**
+ * vt_event_wait_ioctl - event ioctl handler
+ * @arg: argument to ioctl
+ *
+ * Implement the VT_WAITEVENT ioctl using the VT event interface
+ */
+
+static int vt_event_wait_ioctl(struct vt_event __user *event)
+{
+ struct vt_event_wait vw;
+
+ if (copy_from_user(&vw.event, event, sizeof(struct vt_event)))
+ return -EFAULT;
+ /* Highest supported event for now */
+ if (vw.event.event & ~VT_MAX_EVENT)
+ return -EINVAL;
+
+ vt_event_wait(&vw);
+ /* If it occurred report it */
+ if (vw.done) {
+ if (copy_to_user(event, &vw.event, sizeof(struct vt_event)))
+ return -EFAULT;
+ return 0;
+ }
+ return -EINTR;
+}
+
+/**
+ * vt_waitactive - active console wait
+ * @event: event code
+ * @n: new console
+ *
+ * Helper for event waits. Used to implement the legacy
+ * event waiting ioctls in terms of events
+ */
+
+int vt_waitactive(int n)
+{
+ struct vt_event_wait vw;
+ do {
+ if (n == fg_console + 1)
+ break;
+ vw.event.event = VT_EVENT_SWITCH;
+ vt_event_wait(&vw);
+ if (vw.done == 0)
+ return -EINTR;
+ } while (vw.event.new != n);
+ return 0;
+}
+
+/*
* these are the valid i/o ports we're allowed to change. they map all the
* video ports
*/
return 0;
}
+
+
/*
* We handle the console-specific ioctl's here. We allow the
* capability to modify any console, not just the fg_console.
int vt_ioctl(struct tty_struct *tty, struct file * file,
unsigned int cmd, unsigned long arg)
{
- struct vc_data *vc = (struct vc_data *)tty->driver_data;
+ struct vc_data *vc = tty->driver_data;
struct console_font_op op; /* used in multiple places here */
struct kbd_struct * kbd;
unsigned int console;
unsigned char ucval;
void __user *up = (void __user *)arg;
int i, perm;
-
+ int ret = 0;
+
console = vc->vc_num;
- if (!vc_cons_allocated(console)) /* impossible? */
- return -ENOIOCTLCMD;
+ lock_kernel();
+
+ if (!vc_cons_allocated(console)) { /* impossible? */
+ ret = -ENOIOCTLCMD;
+ goto out;
+ }
+
/*
* To have permissions to do most of the vt ioctls, we either have
kbd = kbd_table + console;
switch (cmd) {
+ case TIOCLINUX:
+ ret = tioclinux(tty, arg);
+ break;
case KIOCSOUND:
if (!perm)
- return -EPERM;
+ goto eperm;
+ /* FIXME: This is an old broken API but we need to keep it
+ supported and somehow separate the historic advertised
+ tick rate from any real one */
if (arg)
arg = CLOCK_TICK_RATE / arg;
kd_mksound(arg, 0);
- return 0;
+ break;
case KDMKTONE:
if (!perm)
- return -EPERM;
+ goto eperm;
{
unsigned int ticks, count;
*/
ticks = HZ * ((arg >> 16) & 0xffff) / 1000;
count = ticks ? (arg & 0xffff) : 0;
+ /* FIXME: This is an old broken API but we need to keep it
+ supported and somehow separate the historic advertised
+ tick rate from any real one */
if (count)
count = CLOCK_TICK_RATE / count;
kd_mksound(count, ticks);
- return 0;
+ break;
}
case KDGKBTYPE:
* KDADDIO and KDDELIO may be able to add ports beyond what
* we reject here, but to be safe...
*/
- if (arg < GPFIRST || arg > GPLAST)
- return -EINVAL;
- return sys_ioperm(arg, 1, (cmd == KDADDIO)) ? -ENXIO : 0;
+ if (arg < GPFIRST || arg > GPLAST) {
+ ret = -EINVAL;
+ break;
+ }
+ ret = sys_ioperm(arg, 1, (cmd == KDADDIO)) ? -ENXIO : 0;
+ break;
case KDENABIO:
case KDDISABIO:
- return sys_ioperm(GPFIRST, GPNUM,
+ ret = sys_ioperm(GPFIRST, GPNUM,
(cmd == KDENABIO)) ? -ENXIO : 0;
+ break;
#endif
/* Linux m68k/i386 interface for setting the keyboard delay/repeat rate */
case KDKBDREP:
{
struct kbd_repeat kbrep;
- int err;
if (!capable(CAP_SYS_TTY_CONFIG))
- return -EPERM;
+ goto eperm;
- if (copy_from_user(&kbrep, up, sizeof(struct kbd_repeat)))
- return -EFAULT;
- err = kbd_rate(&kbrep);
- if (err)
- return err;
+ if (copy_from_user(&kbrep, up, sizeof(struct kbd_repeat))) {
+ ret = -EFAULT;
+ break;
+ }
+ ret = kbd_rate(&kbrep);
+ if (ret)
+ break;
if (copy_to_user(up, &kbrep, sizeof(struct kbd_repeat)))
- return -EFAULT;
- return 0;
+ ret = -EFAULT;
+ break;
}
case KDSETMODE:
* need to restore their engine state. --BenH
*/
if (!perm)
- return -EPERM;
+ goto eperm;
switch (arg) {
case KD_GRAPHICS:
break;
case KD_TEXT:
break;
default:
- return -EINVAL;
+ ret = -EINVAL;
+ goto out;
}
if (vc->vc_mode == (unsigned char) arg)
- return 0;
+ break;
vc->vc_mode = (unsigned char) arg;
if (console != fg_console)
- return 0;
+ break;
/*
* explicitly blank/unblank the screen if switching modes
*/
else
do_blank_screen(1);
release_console_sem();
- return 0;
+ break;
case KDGETMODE:
ucval = vc->vc_mode;
* these work like a combination of mmap and KDENABIO.
* this could be easily finished.
*/
- return -EINVAL;
+ ret = -EINVAL;
+ break;
case KDSKBMODE:
if (!perm)
- return -EPERM;
+ goto eperm;
switch(arg) {
case K_RAW:
kbd->kbdmode = VC_RAW;
compute_shiftstate();
break;
default:
- return -EINVAL;
+ ret = -EINVAL;
+ goto out;
}
tty_ldisc_flush(tty);
- return 0;
+ break;
case KDGKBMODE:
ucval = ((kbd->kbdmode == VC_RAW) ? K_RAW :
set_vc_kbd_mode(kbd, VC_META);
break;
default:
- return -EINVAL;
+ ret = -EINVAL;
}
- return 0;
+ break;
case KDGKBMETA:
ucval = (vc_kbd_mode(kbd, VC_META) ? K_ESCPREFIX : K_METABIT);
setint:
- return put_user(ucval, (int __user *)arg);
+ ret = put_user(ucval, (int __user *)arg);
+ break;
case KDGETKEYCODE:
case KDSETKEYCODE:
if(!capable(CAP_SYS_TTY_CONFIG))
- perm=0;
- return do_kbkeycode_ioctl(cmd, up, perm);
+ perm = 0;
+ ret = do_kbkeycode_ioctl(cmd, up, perm);
+ break;
case KDGKBENT:
case KDSKBENT:
- return do_kdsk_ioctl(cmd, up, perm, kbd);
+ ret = do_kdsk_ioctl(cmd, up, perm, kbd);
+ break;
case KDGKBSENT:
case KDSKBSENT:
- return do_kdgkb_ioctl(cmd, up, perm);
+ ret = do_kdgkb_ioctl(cmd, up, perm);
+ break;
case KDGKBDIACR:
{
struct kbdiacrs __user *a = up;
+ struct kbdiacr diacr;
+ int i;
+
+ if (put_user(accent_table_size, &a->kb_cnt)) {
+ ret = -EFAULT;
+ break;
+ }
+ for (i = 0; i < accent_table_size; i++) {
+ diacr.diacr = conv_uni_to_8bit(accent_table[i].diacr);
+ diacr.base = conv_uni_to_8bit(accent_table[i].base);
+ diacr.result = conv_uni_to_8bit(accent_table[i].result);
+ if (copy_to_user(a->kbdiacr + i, &diacr, sizeof(struct kbdiacr))) {
+ ret = -EFAULT;
+ break;
+ }
+ }
+ break;
+ }
+ case KDGKBDIACRUC:
+ {
+ struct kbdiacrsuc __user *a = up;
if (put_user(accent_table_size, &a->kb_cnt))
- return -EFAULT;
- if (copy_to_user(a->kbdiacr, accent_table, accent_table_size*sizeof(struct kbdiacr)))
- return -EFAULT;
- return 0;
+ ret = -EFAULT;
+ else if (copy_to_user(a->kbdiacruc, accent_table,
+ accent_table_size*sizeof(struct kbdiacruc)))
+ ret = -EFAULT;
+ break;
}
case KDSKBDIACR:
{
struct kbdiacrs __user *a = up;
+ struct kbdiacr diacr;
unsigned int ct;
+ int i;
if (!perm)
- return -EPERM;
- if (get_user(ct,&a->kb_cnt))
- return -EFAULT;
- if (ct >= MAX_DIACR)
- return -EINVAL;
+ goto eperm;
+ if (get_user(ct,&a->kb_cnt)) {
+ ret = -EFAULT;
+ break;
+ }
+ if (ct >= MAX_DIACR) {
+ ret = -EINVAL;
+ break;
+ }
accent_table_size = ct;
- if (copy_from_user(accent_table, a->kbdiacr, ct*sizeof(struct kbdiacr)))
- return -EFAULT;
- return 0;
+ for (i = 0; i < ct; i++) {
+ if (copy_from_user(&diacr, a->kbdiacr + i, sizeof(struct kbdiacr))) {
+ ret = -EFAULT;
+ break;
+ }
+ accent_table[i].diacr = conv_8bit_to_uni(diacr.diacr);
+ accent_table[i].base = conv_8bit_to_uni(diacr.base);
+ accent_table[i].result = conv_8bit_to_uni(diacr.result);
+ }
+ break;
+ }
+
+ case KDSKBDIACRUC:
+ {
+ struct kbdiacrsuc __user *a = up;
+ unsigned int ct;
+
+ if (!perm)
+ goto eperm;
+ if (get_user(ct,&a->kb_cnt)) {
+ ret = -EFAULT;
+ break;
+ }
+ if (ct >= MAX_DIACR) {
+ ret = -EINVAL;
+ break;
+ }
+ accent_table_size = ct;
+ if (copy_from_user(accent_table, a->kbdiacruc, ct*sizeof(struct kbdiacruc)))
+ ret = -EFAULT;
+ break;
}
/* the ioctls below read/set the flags usually shown in the leds */
case KDSKBLED:
if (!perm)
- return -EPERM;
- if (arg & ~0x77)
- return -EINVAL;
+ goto eperm;
+ if (arg & ~0x77) {
+ ret = -EINVAL;
+ break;
+ }
kbd->ledflagstate = (arg & 7);
kbd->default_ledflagstate = ((arg >> 4) & 7);
set_leds();
- return 0;
+ break;
/* the ioctls below only set the lights, not the functions */
/* for those, see KDGKBLED and KDSKBLED above */
case KDGETLED:
ucval = getledstate();
setchar:
- return put_user(ucval, (char __user *)arg);
+ ret = put_user(ucval, (char __user *)arg);
+ break;
case KDSETLED:
if (!perm)
- return -EPERM;
+ goto eperm;
setledstate(kbd, arg);
- return 0;
+ break;
/*
* A process can indicate its willingness to accept signals
case KDSIGACCEPT:
{
if (!perm || !capable(CAP_KILL))
- return -EPERM;
+ goto eperm;
if (!valid_signal(arg) || arg < 1 || arg == SIGKILL)
- return -EINVAL;
-
- spin_lock_irq(&vt_spawn_con.lock);
- put_pid(vt_spawn_con.pid);
- vt_spawn_con.pid = get_pid(task_pid(current));
- vt_spawn_con.sig = arg;
- spin_unlock_irq(&vt_spawn_con.lock);
- return 0;
+ ret = -EINVAL;
+ else {
+ spin_lock_irq(&vt_spawn_con.lock);
+ put_pid(vt_spawn_con.pid);
+ vt_spawn_con.pid = get_pid(task_pid(current));
+ vt_spawn_con.sig = arg;
+ spin_unlock_irq(&vt_spawn_con.lock);
+ }
+ break;
}
case VT_SETMODE:
struct vt_mode tmp;
if (!perm)
- return -EPERM;
- if (copy_from_user(&tmp, up, sizeof(struct vt_mode)))
- return -EFAULT;
- if (tmp.mode != VT_AUTO && tmp.mode != VT_PROCESS)
- return -EINVAL;
+ goto eperm;
+ if (copy_from_user(&tmp, up, sizeof(struct vt_mode))) {
+ ret = -EFAULT;
+ goto out;
+ }
+ if (tmp.mode != VT_AUTO && tmp.mode != VT_PROCESS) {
+ ret = -EINVAL;
+ goto out;
+ }
acquire_console_sem();
vc->vt_mode = tmp;
/* the frsig is ignored, so we set it to 0 */
/* no switch is required -- saw@shade.msu.ru */
vc->vt_newvt = -1;
release_console_sem();
- return 0;
+ break;
}
case VT_GETMODE:
release_console_sem();
rc = copy_to_user(up, &tmp, sizeof(struct vt_mode));
- return rc ? -EFAULT : 0;
+ if (rc)
+ ret = -EFAULT;
+ break;
}
/*
unsigned short state, mask;
if (put_user(fg_console + 1, &vtstat->v_active))
- return -EFAULT;
- state = 1; /* /dev/tty0 is always open */
- for (i = 0, mask = 2; i < MAX_NR_CONSOLES && mask; ++i, mask <<= 1)
- if (VT_IS_IN_USE(i))
- state |= mask;
- return put_user(state, &vtstat->v_state);
+ ret = -EFAULT;
+ else {
+ state = 1; /* /dev/tty0 is always open */
+ for (i = 0, mask = 2; i < MAX_NR_CONSOLES && mask;
+ ++i, mask <<= 1)
+ if (VT_IS_IN_USE(i))
+ state |= mask;
+ ret = put_user(state, &vtstat->v_state);
+ }
+ break;
}
/*
*/
case VT_ACTIVATE:
if (!perm)
- return -EPERM;
+ goto eperm;
if (arg == 0 || arg > MAX_NR_CONSOLES)
- return -ENXIO;
- arg--;
- acquire_console_sem();
- i = vc_allocate(arg);
- release_console_sem();
- if (i)
- return i;
- set_console(arg);
- return 0;
+ ret = -ENXIO;
+ else {
+ arg--;
+ acquire_console_sem();
+ ret = vc_allocate(arg);
+ release_console_sem();
+ if (ret)
+ break;
+ set_console(arg);
+ }
+ break;
+
+ case VT_SETACTIVATE:
+ {
+ struct vt_setactivate vsa;
+
+ if (!perm)
+ goto eperm;
+
+ if (copy_from_user(&vsa, (struct vt_setactivate __user *)arg,
+ sizeof(struct vt_setactivate))) {
+ ret = -EFAULT;
+ goto out;
+ }
+ if (vsa.console == 0 || vsa.console > MAX_NR_CONSOLES)
+ ret = -ENXIO;
+ else {
+ vsa.console--;
+ acquire_console_sem();
+ ret = vc_allocate(vsa.console);
+ if (ret == 0) {
+ struct vc_data *nvc;
+ /* This is safe providing we don't drop the
+ console sem between vc_allocate and
+ finishing referencing nvc */
+ nvc = vc_cons[vsa.console].d;
+ nvc->vt_mode = vsa.mode;
+ nvc->vt_mode.frsig = 0;
+ put_pid(nvc->vt_pid);
+ nvc->vt_pid = get_pid(task_pid(current));
+ }
+ release_console_sem();
+ if (ret)
+ break;
+ /* Commence switch and lock */
+ set_console(arg);
+ }
+ }
/*
* wait until the specified VT has been activated
*/
case VT_WAITACTIVE:
if (!perm)
- return -EPERM;
+ goto eperm;
if (arg == 0 || arg > MAX_NR_CONSOLES)
- return -ENXIO;
- return vt_waitactive(arg-1);
+ ret = -ENXIO;
+ else
+ ret = vt_waitactive(arg);
+ break;
/*
* If a vt is under process control, the kernel will not switch to it
*/
case VT_RELDISP:
if (!perm)
- return -EPERM;
- if (vc->vt_mode.mode != VT_PROCESS)
- return -EINVAL;
+ goto eperm;
+ if (vc->vt_mode.mode != VT_PROCESS) {
+ ret = -EINVAL;
+ break;
+ }
/*
* Switching-from response
*/
int newvt;
newvt = vc->vt_newvt;
vc->vt_newvt = -1;
- i = vc_allocate(newvt);
- if (i) {
+ ret = vc_allocate(newvt);
+ if (ret) {
release_console_sem();
- return i;
+ break;
}
/*
* When we actually do the console switch,
*/
complete_change_console(vc_cons[newvt].d);
}
- }
-
- /*
- * Switched-to response
- */
- else
- {
+ } else {
+ /*
+ * Switched-to response
+ */
/*
* If it's just an ACK, ignore it
*/
- if (arg != VT_ACKACQ) {
- release_console_sem();
- return -EINVAL;
- }
+ if (arg != VT_ACKACQ)
+ ret = -EINVAL;
}
release_console_sem();
-
- return 0;
+ break;
/*
* Disallocate memory associated to VT (but leave VT1)
*/
case VT_DISALLOCATE:
- if (arg > MAX_NR_CONSOLES)
- return -ENXIO;
+ if (arg > MAX_NR_CONSOLES) {
+ ret = -ENXIO;
+ break;
+ }
if (arg == 0) {
/* deallocate all unused consoles, but leave 0 */
acquire_console_sem();
/* deallocate a single console, if possible */
arg--;
if (VT_BUSY(arg))
- return -EBUSY;
- if (arg) { /* leave 0 */
+ ret = -EBUSY;
+ else if (arg) { /* leave 0 */
acquire_console_sem();
vc_deallocate(arg);
release_console_sem();
}
}
- return 0;
+ break;
case VT_RESIZE:
{
struct vt_sizes __user *vtsizes = up;
+ struct vc_data *vc;
+
ushort ll,cc;
if (!perm)
- return -EPERM;
+ goto eperm;
if (get_user(ll, &vtsizes->v_rows) ||
get_user(cc, &vtsizes->v_cols))
- return -EFAULT;
- for (i = 0; i < MAX_NR_CONSOLES; i++)
- vc_lock_resize(vc_cons[i].d, cc, ll);
- return 0;
+ ret = -EFAULT;
+ else {
+ acquire_console_sem();
+ for (i = 0; i < MAX_NR_CONSOLES; i++) {
+ vc = vc_cons[i].d;
+
+ if (vc) {
+ vc->vc_resize_user = 1;
+ vc_resize(vc_cons[i].d, cc, ll);
+ }
+ }
+ release_console_sem();
+ }
+ break;
}
case VT_RESIZEX:
struct vt_consize __user *vtconsize = up;
ushort ll,cc,vlin,clin,vcol,ccol;
if (!perm)
- return -EPERM;
+ goto eperm;
if (!access_ok(VERIFY_READ, vtconsize,
- sizeof(struct vt_consize)))
- return -EFAULT;
+ sizeof(struct vt_consize))) {
+ ret = -EFAULT;
+ break;
+ }
+ /* FIXME: Should check the copies properly */
__get_user(ll, &vtconsize->v_rows);
__get_user(cc, &vtconsize->v_cols);
__get_user(vlin, &vtconsize->v_vlin);
vlin = vlin ? vlin : vc->vc_scan_lines;
if (clin) {
if (ll) {
- if (ll != vlin/clin)
- return -EINVAL; /* Parameters don't add up */
+ if (ll != vlin/clin) {
+ /* Parameters don't add up */
+ ret = -EINVAL;
+ break;
+ }
} else
ll = vlin/clin;
}
if (vcol && ccol) {
if (cc) {
- if (cc != vcol/ccol)
- return -EINVAL;
+ if (cc != vcol/ccol) {
+ ret = -EINVAL;
+ break;
+ }
} else
cc = vcol/ccol;
}
- if (clin > 32)
- return -EINVAL;
+ if (clin > 32) {
+ ret = -EINVAL;
+ break;
+ }
for (i = 0; i < MAX_NR_CONSOLES; i++) {
if (!vc_cons[i].d)
vc_cons[i].d->vc_scan_lines = vlin;
if (clin)
vc_cons[i].d->vc_font.height = clin;
+ vc_cons[i].d->vc_resize_user = 1;
vc_resize(vc_cons[i].d, cc, ll);
release_console_sem();
}
- return 0;
+ break;
}
case PIO_FONT: {
if (!perm)
- return -EPERM;
+ goto eperm;
op.op = KD_FONT_OP_SET;
op.flags = KD_FONT_FLAG_OLD | KD_FONT_FLAG_DONT_RECALC; /* Compatibility */
op.width = 8;
op.height = 0;
op.charcount = 256;
op.data = up;
- return con_font_op(vc_cons[fg_console].d, &op);
+ ret = con_font_op(vc_cons[fg_console].d, &op);
+ break;
}
case GIO_FONT: {
op.height = 32;
op.charcount = 256;
op.data = up;
- return con_font_op(vc_cons[fg_console].d, &op);
+ ret = con_font_op(vc_cons[fg_console].d, &op);
+ break;
}
case PIO_CMAP:
if (!perm)
- return -EPERM;
- return con_set_cmap(up);
+ ret = -EPERM;
+ else
+ ret = con_set_cmap(up);
+ break;
case GIO_CMAP:
- return con_get_cmap(up);
+ ret = con_get_cmap(up);
+ break;
case PIO_FONTX:
case GIO_FONTX:
- return do_fontx_ioctl(cmd, up, perm, &op);
+ ret = do_fontx_ioctl(cmd, up, perm, &op);
+ break;
case PIO_FONTRESET:
{
if (!perm)
- return -EPERM;
+ goto eperm;
#ifdef BROKEN_GRAPHICS_PROGRAMS
/* With BROKEN_GRAPHICS_PROGRAMS defined, the default
font is not saved. */
- return -ENOSYS;
+ ret = -ENOSYS;
+ break;
#else
{
op.op = KD_FONT_OP_SET_DEFAULT;
op.data = NULL;
- i = con_font_op(vc_cons[fg_console].d, &op);
- if (i)
- return i;
+ ret = con_font_op(vc_cons[fg_console].d, &op);
+ if (ret)
+ break;
con_set_default_unimap(vc_cons[fg_console].d);
- return 0;
+ break;
}
#endif
}
case KDFONTOP: {
- if (copy_from_user(&op, up, sizeof(op)))
- return -EFAULT;
+ if (copy_from_user(&op, up, sizeof(op))) {
+ ret = -EFAULT;
+ break;
+ }
if (!perm && op.op != KD_FONT_OP_GET)
- return -EPERM;
- i = con_font_op(vc, &op);
- if (i) return i;
+ goto eperm;
+ ret = con_font_op(vc, &op);
+ if (ret)
+ break;
if (copy_to_user(up, &op, sizeof(op)))
- return -EFAULT;
- return 0;
+ ret = -EFAULT;
+ break;
}
case PIO_SCRNMAP:
if (!perm)
- return -EPERM;
- return con_set_trans_old(up);
+ ret = -EPERM;
+ else
+ ret = con_set_trans_old(up);
+ break;
case GIO_SCRNMAP:
- return con_get_trans_old(up);
+ ret = con_get_trans_old(up);
+ break;
case PIO_UNISCRNMAP:
if (!perm)
- return -EPERM;
- return con_set_trans_new(up);
+ ret = -EPERM;
+ else
+ ret = con_set_trans_new(up);
+ break;
case GIO_UNISCRNMAP:
- return con_get_trans_new(up);
+ ret = con_get_trans_new(up);
+ break;
case PIO_UNIMAPCLR:
{ struct unimapinit ui;
if (!perm)
- return -EPERM;
- i = copy_from_user(&ui, up, sizeof(struct unimapinit));
- if (i) return -EFAULT;
- con_clear_unimap(vc, &ui);
- return 0;
+ goto eperm;
+ ret = copy_from_user(&ui, up, sizeof(struct unimapinit));
+ if (!ret)
+ con_clear_unimap(vc, &ui);
+ break;
}
case PIO_UNIMAP:
case GIO_UNIMAP:
- return do_unimap_ioctl(cmd, up, perm, vc);
+ ret = do_unimap_ioctl(cmd, up, perm, vc);
+ break;
case VT_LOCKSWITCH:
if (!capable(CAP_SYS_TTY_CONFIG))
- return -EPERM;
+ goto eperm;
vt_dont_switch = 1;
- return 0;
+ break;
case VT_UNLOCKSWITCH:
if (!capable(CAP_SYS_TTY_CONFIG))
- return -EPERM;
+ goto eperm;
vt_dont_switch = 0;
- return 0;
+ break;
case VT_GETHIFONTMASK:
- return put_user(vc->vc_hi_font_mask, (unsigned short __user *)arg);
+ ret = put_user(vc->vc_hi_font_mask,
+ (unsigned short __user *)arg);
+ break;
+ case VT_WAITEVENT:
+ ret = vt_event_wait_ioctl((struct vt_event __user *)arg);
+ break;
default:
- return -ENOIOCTLCMD;
+ ret = -ENOIOCTLCMD;
}
+out:
+ unlock_kernel();
+ return ret;
+eperm:
+ ret = -EPERM;
+ goto out;
}
-/*
- * Sometimes we want to wait until a particular VT has been activated. We
- * do it in a very simple manner. Everybody waits on a single queue and
- * get woken up at once. Those that are satisfied go on with their business,
- * while those not ready go back to sleep. Seems overkill to add a wait
- * to each vt just for this - usually this does nothing!
- */
-static DECLARE_WAIT_QUEUE_HEAD(vt_activate_queue);
-
-/*
- * Sleeps until a vt is activated, or the task is interrupted. Returns
- * 0 if activation, -EINTR if interrupted.
- */
-int vt_waitactive(int vt)
-{
- int retval;
- DECLARE_WAITQUEUE(wait, current);
-
- add_wait_queue(&vt_activate_queue, &wait);
- for (;;) {
- retval = 0;
-
- /*
- * Synchronize with redraw_screen(). By acquiring the console
- * semaphore we make sure that the console switch is completed
- * before we return. If we didn't wait for the semaphore, we
- * could return at a point where fg_console has already been
- * updated, but the console switch hasn't been completed.
- */
- acquire_console_sem();
- set_current_state(TASK_INTERRUPTIBLE);
- if (vt == fg_console) {
- release_console_sem();
- break;
- }
- release_console_sem();
- retval = -EINTR;
- if (signal_pending(current))
- break;
- schedule();
- }
- remove_wait_queue(&vt_activate_queue, &wait);
- __set_current_state(TASK_RUNNING);
- return retval;
-}
-
-#define vt_wake_waitactive() wake_up(&vt_activate_queue)
-
void reset_vc(struct vc_data *vc)
{
vc->vc_mode = KD_TEXT;
- kbd_table[vc->vc_num].kbdmode = VC_XLATE;
+ kbd_table[vc->vc_num].kbdmode = default_utf8 ? VC_UNICODE : VC_XLATE;
vc->vt_mode.mode = VT_AUTO;
vc->vt_mode.waitv = 0;
vc->vt_mode.relsig = 0;
release_console_sem();
}
+#ifdef CONFIG_COMPAT
+
+struct compat_consolefontdesc {
+ unsigned short charcount; /* characters in font (256 or 512) */
+ unsigned short charheight; /* scan lines per character (1-32) */
+ compat_caddr_t chardata; /* font data in expanded form */
+};
+
+static inline int
+compat_fontx_ioctl(int cmd, struct compat_consolefontdesc __user *user_cfd,
+ int perm, struct console_font_op *op)
+{
+ struct compat_consolefontdesc cfdarg;
+ int i;
+
+ if (copy_from_user(&cfdarg, user_cfd, sizeof(struct compat_consolefontdesc)))
+ return -EFAULT;
+
+ switch (cmd) {
+ case PIO_FONTX:
+ if (!perm)
+ return -EPERM;
+ op->op = KD_FONT_OP_SET;
+ op->flags = KD_FONT_FLAG_OLD;
+ op->width = 8;
+ op->height = cfdarg.charheight;
+ op->charcount = cfdarg.charcount;
+ op->data = compat_ptr(cfdarg.chardata);
+ return con_font_op(vc_cons[fg_console].d, op);
+ case GIO_FONTX:
+ op->op = KD_FONT_OP_GET;
+ op->flags = KD_FONT_FLAG_OLD;
+ op->width = 8;
+ op->height = cfdarg.charheight;
+ op->charcount = cfdarg.charcount;
+ op->data = compat_ptr(cfdarg.chardata);
+ i = con_font_op(vc_cons[fg_console].d, op);
+ if (i)
+ return i;
+ cfdarg.charheight = op->height;
+ cfdarg.charcount = op->charcount;
+ if (copy_to_user(user_cfd, &cfdarg, sizeof(struct compat_consolefontdesc)))
+ return -EFAULT;
+ return 0;
+ }
+ return -EINVAL;
+}
+
+struct compat_console_font_op {
+ compat_uint_t op; /* operation code KD_FONT_OP_* */
+ compat_uint_t flags; /* KD_FONT_FLAG_* */
+ compat_uint_t width, height; /* font size */
+ compat_uint_t charcount;
+ compat_caddr_t data; /* font data with height fixed to 32 */
+};
+
+static inline int
+compat_kdfontop_ioctl(struct compat_console_font_op __user *fontop,
+ int perm, struct console_font_op *op, struct vc_data *vc)
+{
+ int i;
+
+ if (copy_from_user(op, fontop, sizeof(struct compat_console_font_op)))
+ return -EFAULT;
+ if (!perm && op->op != KD_FONT_OP_GET)
+ return -EPERM;
+ op->data = compat_ptr(((struct compat_console_font_op *)op)->data);
+ op->flags |= KD_FONT_FLAG_OLD;
+ i = con_font_op(vc, op);
+ if (i)
+ return i;
+ ((struct compat_console_font_op *)op)->data = (unsigned long)op->data;
+ if (copy_to_user(fontop, op, sizeof(struct compat_console_font_op)))
+ return -EFAULT;
+ return 0;
+}
+
+struct compat_unimapdesc {
+ unsigned short entry_ct;
+ compat_caddr_t entries;
+};
+
+static inline int
+compat_unimap_ioctl(unsigned int cmd, struct compat_unimapdesc __user *user_ud,
+ int perm, struct vc_data *vc)
+{
+ struct compat_unimapdesc tmp;
+ struct unipair __user *tmp_entries;
+
+ if (copy_from_user(&tmp, user_ud, sizeof tmp))
+ return -EFAULT;
+ tmp_entries = compat_ptr(tmp.entries);
+ if (tmp_entries)
+ if (!access_ok(VERIFY_WRITE, tmp_entries,
+ tmp.entry_ct*sizeof(struct unipair)))
+ return -EFAULT;
+ switch (cmd) {
+ case PIO_UNIMAP:
+ if (!perm)
+ return -EPERM;
+ return con_set_unimap(vc, tmp.entry_ct, tmp_entries);
+ case GIO_UNIMAP:
+ if (!perm && fg_console != vc->vc_num)
+ return -EPERM;
+ return con_get_unimap(vc, tmp.entry_ct, &(user_ud->entry_ct), tmp_entries);
+ }
+ return 0;
+}
+
+long vt_compat_ioctl(struct tty_struct *tty, struct file * file,
+ unsigned int cmd, unsigned long arg)
+{
+ struct vc_data *vc = tty->driver_data;
+ struct console_font_op op; /* used in multiple places here */
+ struct kbd_struct *kbd;
+ unsigned int console;
+ void __user *up = (void __user *)arg;
+ int perm;
+ int ret = 0;
+
+ console = vc->vc_num;
+
+ lock_kernel();
+
+ if (!vc_cons_allocated(console)) { /* impossible? */
+ ret = -ENOIOCTLCMD;
+ goto out;
+ }
+
+ /*
+ * To have permissions to do most of the vt ioctls, we either have
+ * to be the owner of the tty, or have CAP_SYS_TTY_CONFIG.
+ */
+ perm = 0;
+ if (current->signal->tty == tty || capable(CAP_SYS_TTY_CONFIG))
+ perm = 1;
+
+ kbd = kbd_table + console;
+ switch (cmd) {
+ /*
+ * these need special handlers for incompatible data structures
+ */
+ case PIO_FONTX:
+ case GIO_FONTX:
+ ret = compat_fontx_ioctl(cmd, up, perm, &op);
+ break;
+
+ case KDFONTOP:
+ ret = compat_kdfontop_ioctl(up, perm, &op, vc);
+ break;
+
+ case PIO_UNIMAP:
+ case GIO_UNIMAP:
+ ret = compat_unimap_ioctl(cmd, up, perm, vc);
+ break;
+
+ /*
+ * all these treat 'arg' as an integer
+ */
+ case KIOCSOUND:
+ case KDMKTONE:
+#ifdef CONFIG_X86
+ case KDADDIO:
+ case KDDELIO:
+#endif
+ case KDSETMODE:
+ case KDMAPDISP:
+ case KDUNMAPDISP:
+ case KDSKBMODE:
+ case KDSKBMETA:
+ case KDSKBLED:
+ case KDSETLED:
+ case KDSIGACCEPT:
+ case VT_ACTIVATE:
+ case VT_WAITACTIVE:
+ case VT_RELDISP:
+ case VT_DISALLOCATE:
+ case VT_RESIZE:
+ case VT_RESIZEX:
+ goto fallback;
+
+ /*
+ * the rest has a compatible data structure behind arg,
+ * but we have to convert it to a proper 64 bit pointer.
+ */
+ default:
+ arg = (unsigned long)compat_ptr(arg);
+ goto fallback;
+ }
+out:
+ unlock_kernel();
+ return ret;
+
+fallback:
+ unlock_kernel();
+ return vt_ioctl(tty, file, cmd, arg);
+}
+
+
+#endif /* CONFIG_COMPAT */
+
+
/*
- * Performs the back end of a vt switch
+ * Performs the back end of a vt switch. Called under the console
+ * semaphore.
*/
static void complete_change_console(struct vc_data *vc)
{
unsigned char old_vc_mode;
+ int old = fg_console;
last_console = fg_console;
/*
* Wake anyone waiting for their VT to activate
*/
- vt_wake_waitactive();
+ vt_event_post(VT_EVENT_SWITCH, old, vc->vc_num);
return;
}
complete_change_console(new_vc);
}
+
+/* Perform a kernel triggered VT switch for suspend/resume */
+
+static int disable_vt_switch;
+
+int vt_move_to_console(unsigned int vt, int alloc)
+{
+ int prev;
+
+ acquire_console_sem();
+ /* Graphics mode - up to X */
+ if (disable_vt_switch) {
+ release_console_sem();
+ return 0;
+ }
+ prev = fg_console;
+
+ if (alloc && vc_allocate(vt)) {
+ /* we can't have a free VC for now. Too bad,
+ * we don't want to mess the screen for now. */
+ release_console_sem();
+ return -ENOSPC;
+ }
+
+ if (set_console(vt)) {
+ /*
+ * We're unable to switch to the SUSPEND_CONSOLE.
+ * Let the calling function know so it can decide
+ * what to do.
+ */
+ release_console_sem();
+ return -EIO;
+ }
+ release_console_sem();
+ if (vt_waitactive(vt + 1)) {
+ pr_debug("Suspend: Can't switch VCs.");
+ return -EINTR;
+ }
+ return prev;
+}
+
+/*
+ * Normally during a suspend, we allocate a new console and switch to it.
+ * When we resume, we switch back to the original console. This switch
+ * can be slow, so on systems where the framebuffer can handle restoration
+ * of video registers anyways, there's little point in doing the console
+ * switch. This function allows you to disable it by passing it '0'.
+ */
+void pm_set_vt_switch(int do_switch)
+{
+ acquire_console_sem();
+ disable_vt_switch = !do_switch;
+ release_console_sem();
+}
+EXPORT_SYMBOL(pm_set_vt_switch);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff