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vt: push down tioclinux cases

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Some of this ventures into selection which is still a complete lost cause. We
are not making it any worse. It's completely busted anyway.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alan Cox 2012-03-02 14:59:37 +00:00 committed by Greg Kroah-Hartman
parent 4001d7b7fc
commit 20f62579dc
3 changed files with 18 additions and 8 deletions
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12
drivers/tty/vt/selection.c
View File

@ -75,7 +75,7 @@ clear_selection(void) {
/*
* User settable table: what characters are to be considered alphabetic?
* 256 bits
* 256 bits. FIXME: Needs a locking model.
*/
static u32 inwordLut[8]={
0x00000000, /* control chars */
@ -307,7 +307,8 @@ int set_selection(const struct tiocl_selection __user *sel, struct tty_struct *t
* queue of the tty associated with the current console.
* Invoked by ioctl().
*
* Locking: always called with BTM from vt_ioctl
* Locking: called without locks. Calls the ldisc wrongly with
* unsafe methods,
*/
int paste_selection(struct tty_struct *tty)
{
@ -322,13 +323,12 @@ int paste_selection(struct tty_struct *tty)
poke_blanked_console();
console_unlock();
/* FIXME: wtf is this supposed to achieve ? */
ld = tty_ldisc_ref(tty);
if (!ld) {
tty_unlock();
if (!ld)
ld = tty_ldisc_ref_wait(tty);
tty_lock();
}
/* FIXME: this is completely unsafe */
add_wait_queue(&vc->paste_wait, &wait);
while (sel_buffer && sel_buffer_lth > pasted) {
set_current_state(TASK_INTERRUPTIBLE);

12
drivers/tty/vt/vt.c
View File

@ -2637,11 +2637,15 @@ int tioclinux(struct tty_struct *tty, unsigned long arg)
ret = __put_user(data, p);
break;
case TIOCL_GETMOUSEREPORTING:
console_lock(); /* May be overkill */
data = mouse_reporting();
console_unlock();
ret = __put_user(data, p);
break;
case TIOCL_SETVESABLANK:
console_lock();
ret = set_vesa_blanking(p);
console_unlock();
break;
case TIOCL_GETKMSGREDIRECT:
data = vt_get_kmsg_redirect();
@ -2658,13 +2662,21 @@ int tioclinux(struct tty_struct *tty, unsigned long arg)
}
break;
case TIOCL_GETFGCONSOLE:
/* No locking needed as this is a transiently
correct return anyway if the caller hasn't
disabled switching */
ret = fg_console;
break;
case TIOCL_SCROLLCONSOLE:
if (get_user(lines, (s32 __user *)(p+4))) {
ret = -EFAULT;
} else {
/* Need the console lock here. Note that lots
of other calls need fixing before the lock
is actually useful ! */
console_lock();
scrollfront(vc_cons[fg_console].d, lines);
console_unlock();
ret = 0;
}
break;

2
drivers/tty/vt/vt_ioctl.c
View File

@ -298,9 +298,7 @@ int vt_ioctl(struct tty_struct *tty,
switch (cmd) {
case TIOCLINUX:
tty_lock();
ret = tioclinux(tty, arg);
tty_unlock();
break;
case KIOCSOUND:
if (!perm)