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Commit 9cc3c22b authored by Alan Cox's avatar Alan Cox Committed by Linus Torvalds
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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: default avatarAlan Cox <alan@redhat.com>

Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent dd9a451a

drivers/char/vt_ioctl.c

+268 −184
Original line number Diff line number Diff line
@@ -373,11 +373,17 @@ int vt_ioctl(struct tty_struct *tty, struct file * file, 
	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
@@ -391,15 +397,15 @@ int vt_ioctl(struct tty_struct *tty, struct file * file, 
	switch (cmd) {

	case KIOCSOUND:

		if (!perm)

			return -EPERM;

			goto eperm;

		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;
@@ -412,7 +418,7 @@ int vt_ioctl(struct tty_struct *tty, struct file * file, 
		if (count)

			count = CLOCK_TICK_RATE / count;

		kd_mksound(count, ticks);

		return 0;

		break;

	}



	case KDGKBTYPE:
@@ -435,14 +441,18 @@ int vt_ioctl(struct tty_struct *tty, struct file * file, 
		 * 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 */
@@ -450,19 +460,20 @@ int vt_ioctl(struct tty_struct *tty, struct file * file, 
	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:
@@ -475,7 +486,7 @@ int vt_ioctl(struct tty_struct *tty, struct file * file, 
		 * need to restore their engine state. --BenH

		 */

		if (!perm)

			return -EPERM;

			goto eperm;

		switch (arg) {

		case KD_GRAPHICS:

			break;
@@ -485,13 +496,14 @@ int vt_ioctl(struct tty_struct *tty, struct file * file, 
		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

		 */
@@ -501,7 +513,7 @@ int vt_ioctl(struct tty_struct *tty, struct file * file, 
		else

			do_blank_screen(1);

		release_console_sem();

		return 0;

		break;



	case KDGETMODE:

		ucval = vc->vc_mode;
@@ -513,11 +525,12 @@ int vt_ioctl(struct tty_struct *tty, struct file * file, 
		 * 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;
@@ -534,10 +547,11 @@ int vt_ioctl(struct tty_struct *tty, struct file * file, 
			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 :
@@ -557,28 +571,32 @@ int vt_ioctl(struct tty_struct *tty, struct file * file, 
			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);

		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:

	{
@@ -586,26 +604,31 @@ int vt_ioctl(struct tty_struct *tty, struct file * file, 
		struct kbdiacr diacr;

		int i;



		if (put_user(accent_table_size, &a->kb_cnt))

			return -EFAULT;

		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)))

				return -EFAULT;

			if (copy_to_user(a->kbdiacr + i, &diacr, sizeof(struct kbdiacr))) {

				ret = -EFAULT;

				break;

			}

		return 0;

		}

		break;

	}

	case KDGKBDIACRUC:

	{

		struct kbdiacrsuc __user *a = up;



		if (put_user(accent_table_size, &a->kb_cnt))

			return -EFAULT;

		if (copy_to_user(a->kbdiacruc, accent_table, accent_table_size*sizeof(struct kbdiacruc)))

			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:
@@ -616,20 +639,26 @@ int vt_ioctl(struct tty_struct *tty, struct file * file, 
		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;

		for (i = 0; i < ct; i++) {

			if (copy_from_user(&diacr, a->kbdiacr + i, sizeof(struct kbdiacr)))

				return -EFAULT;

			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);

		}

		return 0;

		break;

	}



	case KDSKBDIACRUC:
@@ -638,15 +667,19 @@ int vt_ioctl(struct tty_struct *tty, struct file * file, 
		unsigned int ct;



		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->kbdiacruc, ct*sizeof(struct kbdiacruc)))

			return -EFAULT;

		return 0;

			ret = -EFAULT;

		break;

	}



	/* the ioctls below read/set the flags usually shown in the leds */
@@ -657,26 +690,29 @@ int vt_ioctl(struct tty_struct *tty, struct file * file, 


	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
@@ -688,16 +724,17 @@ int vt_ioctl(struct tty_struct *tty, struct file * file, 
	case KDSIGACCEPT:

	{

		if (!perm || !capable(CAP_KILL))

		  return -EPERM;

			goto eperm;

		if (!valid_signal(arg) || arg < 1 || arg == SIGKILL)

		  return -EINVAL;



			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);

		return 0;

		}

		break;

	}



	case VT_SETMODE:
@@ -705,11 +742,15 @@ int vt_ioctl(struct tty_struct *tty, struct file * file, 
		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 */
@@ -719,7 +760,7 @@ int vt_ioctl(struct tty_struct *tty, struct file * file, 
		/* no switch is required -- saw@shade.msu.ru */

		vc->vt_newvt = -1;

		release_console_sem();

		return 0;

		break;

	}



	case VT_GETMODE:
@@ -732,7 +773,9 @@ int vt_ioctl(struct tty_struct *tty, struct file * file, 
		release_console_sem();



		rc = copy_to_user(up, &tmp, sizeof(struct vt_mode));

		return rc ? -EFAULT : 0;

		if (rc)

			ret = -EFAULT;

		break;

	}



	/*
@@ -746,12 +789,16 @@ int vt_ioctl(struct tty_struct *tty, struct file * file, 
		unsigned short state, mask;



		if (put_user(fg_console + 1, &vtstat->v_active))

			return -EFAULT;

			ret = -EFAULT;

		else {

			state = 1;	/* /dev/tty0 is always open */

		for (i = 0, mask = 2; i < MAX_NR_CONSOLES && mask; ++i, mask <<= 1)

			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 = put_user(state, &vtstat->v_state);

		}

		break;

	}



	/*
@@ -771,27 +818,31 @@ int vt_ioctl(struct tty_struct *tty, struct file * file, 
	 */

	case VT_ACTIVATE:

		if (!perm)

			return -EPERM;

			goto eperm;

		if (arg == 0 || arg > MAX_NR_CONSOLES)

			return -ENXIO;

			ret =  -ENXIO;

		else {

			arg--;

			acquire_console_sem();

		i = vc_allocate(arg);

			ret = vc_allocate(arg);

			release_console_sem();

		if (i)

			return i;

			if (ret)

				break;

			set_console(arg);

		return 0;

		}

		break;



	/*

	 * 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 - 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);

			}

		}



		} else {

			/*

			 * Switched-to response

			 */

		else

		{

			/*

			 * 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:

	{
@@ -893,11 +942,11 @@ 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;
@@ -906,8 +955,8 @@ int vt_ioctl(struct tty_struct *tty, struct file * file, 
					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;

			goto eperm;

		ret = copy_from_user(&ui, up, sizeof(struct unimapinit));

		if (!ret)

			con_clear_unimap(vc, &ui);

		return 0;

		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;

}



/*