vt_ioctl: Prepare for BKL push down
This one could do with some eyeballs on it. In theory it simply wraps the ioctl handler in lock/unlock_kernel ready for the lock/unlocks to be pushed into specific switch values. To do that means changing the code to return via a common exit path not all over the place as it does now, hence the big diff Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alan Cox
Linus Torvalds
parent
dd9a451aad
commit
9cc3c22bf0
@ -373,11 +373,17 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
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unsigned char ucval;
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void __user *up = (void __user *)arg;
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int i, perm;
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int ret = 0;
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console = vc->vc_num;
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if (!vc_cons_allocated(console)) /* impossible? */
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return -ENOIOCTLCMD;
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lock_kernel();
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if (!vc_cons_allocated(console)) { /* impossible? */
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ret = -ENOIOCTLCMD;
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goto out;
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}
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/*
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* To have permissions to do most of the vt ioctls, we either have
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@ -391,15 +397,15 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
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switch (cmd) {
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case KIOCSOUND:
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if (!perm)
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return -EPERM;
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goto eperm;
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if (arg)
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arg = CLOCK_TICK_RATE / arg;
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kd_mksound(arg, 0);
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return 0;
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break;
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case KDMKTONE:
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if (!perm)
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return -EPERM;
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goto eperm;
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{
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unsigned int ticks, count;
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@ -412,7 +418,7 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
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if (count)
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count = CLOCK_TICK_RATE / count;
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kd_mksound(count, ticks);
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return 0;
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break;
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}
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case KDGKBTYPE:
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@ -435,14 +441,18 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
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* KDADDIO and KDDELIO may be able to add ports beyond what
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* we reject here, but to be safe...
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*/
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if (arg < GPFIRST || arg > GPLAST)
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return -EINVAL;
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return sys_ioperm(arg, 1, (cmd == KDADDIO)) ? -ENXIO : 0;
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if (arg < GPFIRST || arg > GPLAST) {
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ret = -EINVAL;
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break;
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}
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ret = sys_ioperm(arg, 1, (cmd == KDADDIO)) ? -ENXIO : 0;
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break;
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case KDENABIO:
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case KDDISABIO:
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return sys_ioperm(GPFIRST, GPNUM,
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ret = sys_ioperm(GPFIRST, GPNUM,
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(cmd == KDENABIO)) ? -ENXIO : 0;
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break;
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#endif
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/* Linux m68k/i386 interface for setting the keyboard delay/repeat rate */
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@ -450,19 +460,20 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
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case KDKBDREP:
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{
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struct kbd_repeat kbrep;
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int err;
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if (!capable(CAP_SYS_TTY_CONFIG))
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return -EPERM;
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goto eperm;
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if (copy_from_user(&kbrep, up, sizeof(struct kbd_repeat)))
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return -EFAULT;
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err = kbd_rate(&kbrep);
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if (err)
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return err;
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if (copy_from_user(&kbrep, up, sizeof(struct kbd_repeat))) {
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ret = -EFAULT;
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break;
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}
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ret = kbd_rate(&kbrep);
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if (ret)
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break;
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if (copy_to_user(up, &kbrep, sizeof(struct kbd_repeat)))
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return -EFAULT;
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return 0;
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ret = -EFAULT;
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break;
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}
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case KDSETMODE:
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@ -475,7 +486,7 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
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* need to restore their engine state. --BenH
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*/
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if (!perm)
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return -EPERM;
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goto eperm;
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switch (arg) {
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case KD_GRAPHICS:
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break;
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@ -485,13 +496,14 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
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case KD_TEXT:
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break;
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default:
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return -EINVAL;
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ret = -EINVAL;
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goto out;
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}
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if (vc->vc_mode == (unsigned char) arg)
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return 0;
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break;
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vc->vc_mode = (unsigned char) arg;
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if (console != fg_console)
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return 0;
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break;
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/*
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* explicitly blank/unblank the screen if switching modes
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*/
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@ -501,7 +513,7 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
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else
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do_blank_screen(1);
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release_console_sem();
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return 0;
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break;
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case KDGETMODE:
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ucval = vc->vc_mode;
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@ -513,11 +525,12 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
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* these work like a combination of mmap and KDENABIO.
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* this could be easily finished.
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*/
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return -EINVAL;
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ret = -EINVAL;
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break;
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case KDSKBMODE:
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if (!perm)
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return -EPERM;
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goto eperm;
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switch(arg) {
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case K_RAW:
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kbd->kbdmode = VC_RAW;
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@ -534,10 +547,11 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
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compute_shiftstate();
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break;
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default:
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return -EINVAL;
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ret = -EINVAL;
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goto out;
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}
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tty_ldisc_flush(tty);
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return 0;
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break;
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case KDGKBMODE:
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ucval = ((kbd->kbdmode == VC_RAW) ? K_RAW :
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@ -557,28 +571,32 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
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set_vc_kbd_mode(kbd, VC_META);
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break;
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default:
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return -EINVAL;
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ret = -EINVAL;
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}
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return 0;
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break;
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case KDGKBMETA:
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ucval = (vc_kbd_mode(kbd, VC_META) ? K_ESCPREFIX : K_METABIT);
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setint:
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return put_user(ucval, (int __user *)arg);
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ret = put_user(ucval, (int __user *)arg);
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break;
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case KDGETKEYCODE:
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case KDSETKEYCODE:
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if(!capable(CAP_SYS_TTY_CONFIG))
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perm=0;
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return do_kbkeycode_ioctl(cmd, up, perm);
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perm = 0;
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ret = do_kbkeycode_ioctl(cmd, up, perm);
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break;
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case KDGKBENT:
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case KDSKBENT:
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return do_kdsk_ioctl(cmd, up, perm, kbd);
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ret = do_kdsk_ioctl(cmd, up, perm, kbd);
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break;
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case KDGKBSENT:
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case KDSKBSENT:
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return do_kdgkb_ioctl(cmd, up, perm);
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ret = do_kdgkb_ioctl(cmd, up, perm);
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break;
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case KDGKBDIACR:
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{
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@ -586,26 +604,31 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
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struct kbdiacr diacr;
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int i;
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if (put_user(accent_table_size, &a->kb_cnt))
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return -EFAULT;
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if (put_user(accent_table_size, &a->kb_cnt)) {
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ret = -EFAULT;
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break;
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}
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for (i = 0; i < accent_table_size; i++) {
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diacr.diacr = conv_uni_to_8bit(accent_table[i].diacr);
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diacr.base = conv_uni_to_8bit(accent_table[i].base);
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diacr.result = conv_uni_to_8bit(accent_table[i].result);
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if (copy_to_user(a->kbdiacr + i, &diacr, sizeof(struct kbdiacr)))
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return -EFAULT;
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if (copy_to_user(a->kbdiacr + i, &diacr, sizeof(struct kbdiacr))) {
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ret = -EFAULT;
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break;
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}
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}
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return 0;
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break;
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}
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case KDGKBDIACRUC:
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{
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struct kbdiacrsuc __user *a = up;
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if (put_user(accent_table_size, &a->kb_cnt))
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return -EFAULT;
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if (copy_to_user(a->kbdiacruc, accent_table, accent_table_size*sizeof(struct kbdiacruc)))
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return -EFAULT;
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return 0;
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ret = -EFAULT;
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else if (copy_to_user(a->kbdiacruc, accent_table,
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accent_table_size*sizeof(struct kbdiacruc)))
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ret = -EFAULT;
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break;
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}
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case KDSKBDIACR:
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@ -616,20 +639,26 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
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int i;
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if (!perm)
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return -EPERM;
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if (get_user(ct,&a->kb_cnt))
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return -EFAULT;
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if (ct >= MAX_DIACR)
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return -EINVAL;
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goto eperm;
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if (get_user(ct,&a->kb_cnt)) {
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ret = -EFAULT;
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break;
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}
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if (ct >= MAX_DIACR) {
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ret = -EINVAL;
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break;
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}
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accent_table_size = ct;
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for (i = 0; i < ct; i++) {
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if (copy_from_user(&diacr, a->kbdiacr + i, sizeof(struct kbdiacr)))
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return -EFAULT;
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if (copy_from_user(&diacr, a->kbdiacr + i, sizeof(struct kbdiacr))) {
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ret = -EFAULT;
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break;
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}
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accent_table[i].diacr = conv_8bit_to_uni(diacr.diacr);
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accent_table[i].base = conv_8bit_to_uni(diacr.base);
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accent_table[i].result = conv_8bit_to_uni(diacr.result);
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}
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return 0;
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break;
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}
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case KDSKBDIACRUC:
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@ -638,15 +667,19 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
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unsigned int ct;
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if (!perm)
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return -EPERM;
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if (get_user(ct,&a->kb_cnt))
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return -EFAULT;
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if (ct >= MAX_DIACR)
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return -EINVAL;
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goto eperm;
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if (get_user(ct,&a->kb_cnt)) {
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ret = -EFAULT;
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break;
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}
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if (ct >= MAX_DIACR) {
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ret = -EINVAL;
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break;
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}
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accent_table_size = ct;
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if (copy_from_user(accent_table, a->kbdiacruc, ct*sizeof(struct kbdiacruc)))
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return -EFAULT;
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return 0;
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ret = -EFAULT;
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break;
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}
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/* the ioctls below read/set the flags usually shown in the leds */
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@ -657,26 +690,29 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
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case KDSKBLED:
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if (!perm)
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return -EPERM;
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if (arg & ~0x77)
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return -EINVAL;
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goto eperm;
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if (arg & ~0x77) {
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ret = -EINVAL;
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break;
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}
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kbd->ledflagstate = (arg & 7);
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kbd->default_ledflagstate = ((arg >> 4) & 7);
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set_leds();
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return 0;
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break;
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/* the ioctls below only set the lights, not the functions */
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/* for those, see KDGKBLED and KDSKBLED above */
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case KDGETLED:
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ucval = getledstate();
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setchar:
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return put_user(ucval, (char __user *)arg);
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ret = put_user(ucval, (char __user *)arg);
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break;
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case KDSETLED:
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if (!perm)
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return -EPERM;
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goto eperm;
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setledstate(kbd, arg);
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return 0;
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break;
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/*
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* A process can indicate its willingness to accept signals
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@ -688,16 +724,17 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
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case KDSIGACCEPT:
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{
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if (!perm || !capable(CAP_KILL))
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return -EPERM;
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goto eperm;
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if (!valid_signal(arg) || arg < 1 || arg == SIGKILL)
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return -EINVAL;
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spin_lock_irq(&vt_spawn_con.lock);
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put_pid(vt_spawn_con.pid);
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vt_spawn_con.pid = get_pid(task_pid(current));
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vt_spawn_con.sig = arg;
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spin_unlock_irq(&vt_spawn_con.lock);
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return 0;
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ret = -EINVAL;
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else {
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spin_lock_irq(&vt_spawn_con.lock);
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put_pid(vt_spawn_con.pid);
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vt_spawn_con.pid = get_pid(task_pid(current));
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vt_spawn_con.sig = arg;
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spin_unlock_irq(&vt_spawn_con.lock);
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}
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break;
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}
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case VT_SETMODE:
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@ -705,11 +742,15 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
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struct vt_mode tmp;
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if (!perm)
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return -EPERM;
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if (copy_from_user(&tmp, up, sizeof(struct vt_mode)))
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return -EFAULT;
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if (tmp.mode != VT_AUTO && tmp.mode != VT_PROCESS)
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return -EINVAL;
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goto eperm;
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if (copy_from_user(&tmp, up, sizeof(struct vt_mode))) {
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ret = -EFAULT;
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goto out;
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}
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if (tmp.mode != VT_AUTO && tmp.mode != VT_PROCESS) {
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ret = -EINVAL;
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goto out;
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}
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acquire_console_sem();
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vc->vt_mode = tmp;
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/* the frsig is ignored, so we set it to 0 */
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@ -719,7 +760,7 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
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/* no switch is required -- saw@shade.msu.ru */
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vc->vt_newvt = -1;
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release_console_sem();
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return 0;
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break;
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}
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case VT_GETMODE:
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@ -732,7 +773,9 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
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release_console_sem();
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rc = copy_to_user(up, &tmp, sizeof(struct vt_mode));
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return rc ? -EFAULT : 0;
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if (rc)
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ret = -EFAULT;
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break;
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}
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/*
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@ -746,12 +789,16 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
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unsigned short state, mask;
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if (put_user(fg_console + 1, &vtstat->v_active))
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return -EFAULT;
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state = 1; /* /dev/tty0 is always open */
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for (i = 0, mask = 2; i < MAX_NR_CONSOLES && mask; ++i, mask <<= 1)
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if (VT_IS_IN_USE(i))
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state |= mask;
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return put_user(state, &vtstat->v_state);
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ret = -EFAULT;
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else {
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state = 1; /* /dev/tty0 is always open */
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for (i = 0, mask = 2; i < MAX_NR_CONSOLES && mask;
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++i, mask <<= 1)
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if (VT_IS_IN_USE(i))
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state |= mask;
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ret = put_user(state, &vtstat->v_state);
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}
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break;
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}
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/*
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@ -771,27 +818,31 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
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*/
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case VT_ACTIVATE:
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if (!perm)
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return -EPERM;
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goto eperm;
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if (arg == 0 || arg > MAX_NR_CONSOLES)
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return -ENXIO;
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arg--;
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acquire_console_sem();
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i = vc_allocate(arg);
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release_console_sem();
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if (i)
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return i;
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set_console(arg);
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return 0;
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ret = -ENXIO;
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else {
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arg--;
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acquire_console_sem();
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ret = vc_allocate(arg);
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release_console_sem();
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if (ret)
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break;
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set_console(arg);
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}
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break;
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/*
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* wait until the specified VT has been activated
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*/
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case VT_WAITACTIVE:
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if (!perm)
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return -EPERM;
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goto eperm;
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if (arg == 0 || arg > MAX_NR_CONSOLES)
|
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return -ENXIO;
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return vt_waitactive(arg-1);
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ret = -ENXIO;
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else
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ret = vt_waitactive(arg - 1);
|
||||
break;
|
||||
|
||||
/*
|
||||
* If a vt is under process control, the kernel will not switch to it
|
||||
@ -805,10 +856,12 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
|
||||
*/
|
||||
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
|
||||
*/
|
||||
@ -829,10 +882,10 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
|
||||
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,
|
||||
@ -841,31 +894,27 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
|
||||
*/
|
||||
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();
|
||||
@ -877,14 +926,14 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
|
||||
/* 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:
|
||||
{
|
||||
@ -893,21 +942,21 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
|
||||
|
||||
ushort ll,cc;
|
||||
if (!perm)
|
||||
return -EPERM;
|
||||
goto eperm;
|
||||
if (get_user(ll, &vtsizes->v_rows) ||
|
||||
get_user(cc, &vtsizes->v_cols))
|
||||
return -EFAULT;
|
||||
ret = -EFAULT;
|
||||
else {
|
||||
for (i = 0; i < MAX_NR_CONSOLES; i++) {
|
||||
vc = vc_cons[i].d;
|
||||
|
||||
for (i = 0; i < MAX_NR_CONSOLES; i++) {
|
||||
vc = vc_cons[i].d;
|
||||
|
||||
if (vc) {
|
||||
vc->vc_resize_user = 1;
|
||||
vc_lock_resize(vc_cons[i].d, cc, ll);
|
||||
if (vc) {
|
||||
vc->vc_resize_user = 1;
|
||||
vc_lock_resize(vc_cons[i].d, cc, ll);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
break;
|
||||
}
|
||||
|
||||
case VT_RESIZEX:
|
||||
@ -915,10 +964,13 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
|
||||
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);
|
||||
@ -928,21 +980,28 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
|
||||
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)
|
||||
@ -956,19 +1015,20 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
|
||||
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: {
|
||||
@ -978,100 +1038,124 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
|
||||
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;
|
||||
default:
|
||||
return -ENOIOCTLCMD;
|
||||
ret = -ENOIOCTLCMD;
|
||||
}
|
||||
out:
|
||||
unlock_kernel();
|
||||
return ret;
|
||||
eperm:
|
||||
ret = -EPERM;
|
||||
goto out;
|
||||
}
|
||||
|
||||
/*
|
||||
|
||||
Loading…
Reference in New Issue
Block a user