add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/mtd/ubi/cdev.c
..
..
@@ -1,19 +1,6 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  * Copyright (c) International Business Machines Corp., 2006
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License as published by
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- * the Free Software Foundation; either version 2 of the License, or
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- * (at your option) any later version.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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- * the GNU General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License
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- * along with this program; if not, write to the Free Software
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- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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  *
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  * Author: Artem Bityutskiy (Битюцкий Артём)
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  */
..
..
@@ -974,6 +961,36 @@
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 		break;
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 	}
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+	/* Check a specific PEB for bitflips and scrub it if needed */
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+	case UBI_IOCRPEB:
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+	{
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+		int pnum;
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+
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+		err = get_user(pnum, (__user int32_t *)argp);
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+		if (err) {
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+			err = -EFAULT;
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+			break;
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+		}
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+
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+		err = ubi_bitflip_check(ubi, pnum, 0);
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+		break;
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+	}
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+
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+	/* Force scrubbing for a specific PEB */
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+	case UBI_IOCSPEB:
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+	{
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+		int pnum;
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+
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+		err = get_user(pnum, (__user int32_t *)argp);
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+		if (err) {
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+			err = -EFAULT;
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+			break;
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+		}
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+
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+		err = ubi_bitflip_check(ubi, pnum, 1);
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+		break;
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+	}
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+
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 	default:
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 		err = -ENOTTY;
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 		break;
..
..
@@ -1061,36 +1078,6 @@
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 	return err;
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 }
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-#ifdef CONFIG_COMPAT
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-static long vol_cdev_compat_ioctl(struct file *file, unsigned int cmd,
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-				  unsigned long arg)
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-{
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-	unsigned long translated_arg = (unsigned long)compat_ptr(arg);
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-
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-	return vol_cdev_ioctl(file, cmd, translated_arg);
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-}
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-
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-static long ubi_cdev_compat_ioctl(struct file *file, unsigned int cmd,
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-				  unsigned long arg)
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-{
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-	unsigned long translated_arg = (unsigned long)compat_ptr(arg);
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-
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-	return ubi_cdev_ioctl(file, cmd, translated_arg);
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-}
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-
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-static long ctrl_cdev_compat_ioctl(struct file *file, unsigned int cmd,
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-				   unsigned long arg)
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-{
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-	unsigned long translated_arg = (unsigned long)compat_ptr(arg);
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-
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-	return ctrl_cdev_ioctl(file, cmd, translated_arg);
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-}
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-#else
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-#define vol_cdev_compat_ioctl  NULL
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-#define ubi_cdev_compat_ioctl  NULL
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-#define ctrl_cdev_compat_ioctl NULL
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-#endif
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-
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 /* UBI volume character device operations */
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 const struct file_operations ubi_vol_cdev_operations = {
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 	.owner          = THIS_MODULE,
..
..
@@ -1101,7 +1088,7 @@
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 	.write          = vol_cdev_write,
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 	.fsync		= vol_cdev_fsync,
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 	.unlocked_ioctl = vol_cdev_ioctl,
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-	.compat_ioctl   = vol_cdev_compat_ioctl,
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+	.compat_ioctl   = compat_ptr_ioctl,
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 };
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 /* UBI character device operations */
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..
@@ -1109,13 +1096,13 @@
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 	.owner          = THIS_MODULE,
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 	.llseek         = no_llseek,
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 	.unlocked_ioctl = ubi_cdev_ioctl,
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-	.compat_ioctl   = ubi_cdev_compat_ioctl,
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+	.compat_ioctl   = compat_ptr_ioctl,
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 };
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 /* UBI control character device operations */
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 const struct file_operations ubi_ctrl_cdev_operations = {
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 	.owner          = THIS_MODULE,
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 	.unlocked_ioctl = ctrl_cdev_ioctl,
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-	.compat_ioctl   = ctrl_cdev_compat_ioctl,
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+	.compat_ioctl   = compat_ptr_ioctl,
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 	.llseek		= no_llseek,
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 };