diff options
Diffstat (limited to 'drivers/mtd/ubi/cdev.c')
| -rw-r--r-- | drivers/mtd/ubi/cdev.c | 158 |
1 files changed, 107 insertions, 51 deletions
diff --git a/drivers/mtd/ubi/cdev.c b/drivers/mtd/ubi/cdev.c index 22547d7a84ea..b700a0efaa93 100644 --- a/drivers/mtd/ubi/cdev.c +++ b/drivers/mtd/ubi/cdev.c @@ -1,20 +1,7 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (c) International Business Machines Corp., 2006 * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See - * the GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * * Author: Artem Bityutskiy (Битюцкий Артём) */ @@ -685,7 +672,7 @@ static int verify_rsvol_req(const struct ubi_device *ubi, * @req: volumes re-name request * * This is a helper function for the volume re-name IOCTL which validates the - * the request, opens the volume and calls corresponding volumes management + * request, opens the volume and calls corresponding volumes management * function. Returns zero in case of success and a negative error code in case * of failure. */ @@ -841,6 +828,70 @@ out_free: return err; } +static int ubi_get_ec_info(struct ubi_device *ubi, struct ubi_ecinfo_req __user *ureq) +{ + struct ubi_ecinfo_req req; + struct ubi_wl_entry *wl; + int read_cnt; + int peb; + int end_peb; + + /* Copy the input arguments */ + if (copy_from_user(&req, ureq, sizeof(struct ubi_ecinfo_req))) + return -EFAULT; + + /* Check input arguments */ + if (req.length <= 0 || req.start < 0 || req.start >= ubi->peb_count) + return -EINVAL; + + if (check_add_overflow(req.start, req.length, &end_peb)) + return -EINVAL; + + if (end_peb > ubi->peb_count) + end_peb = ubi->peb_count; + + /* Check access rights before filling erase_counters array */ + if (!access_ok((void __user *)ureq->erase_counters, + (end_peb-req.start) * sizeof(int32_t))) + return -EFAULT; + + /* Fill erase counter array */ + read_cnt = 0; + for (peb = req.start; peb < end_peb; read_cnt++, peb++) { + int ec; + + if (ubi_io_is_bad(ubi, peb)) { + if (__put_user(UBI_UNKNOWN, ureq->erase_counters+read_cnt)) + return -EFAULT; + + continue; + } + + spin_lock(&ubi->wl_lock); + + wl = ubi->lookuptbl[peb]; + if (wl) + ec = wl->ec; + else + ec = UBI_UNKNOWN; + + spin_unlock(&ubi->wl_lock); + + if (__put_user(ec, ureq->erase_counters+read_cnt)) + return -EFAULT; + + } + + /* Return actual read length */ + req.read_length = read_cnt; + + /* Copy everything except erase counter array */ + if (copy_to_user(ureq, &req, sizeof(struct ubi_ecinfo_req))) + return -EFAULT; + + return 0; +} + static long ubi_cdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { @@ -974,6 +1025,42 @@ static long ubi_cdev_ioctl(struct file *file, unsigned int cmd, break; } + /* Check a specific PEB for bitflips and scrub it if needed */ + case UBI_IOCRPEB: + { + int pnum; + + err = get_user(pnum, (__user int32_t *)argp); + if (err) { + err = -EFAULT; + break; + } + + err = ubi_bitflip_check(ubi, pnum, 0); + break; + } + + /* Force scrubbing for a specific PEB */ + case UBI_IOCSPEB: + { + int pnum; + + err = get_user(pnum, (__user int32_t *)argp); + if (err) { + err = -EFAULT; + break; + } + + err = ubi_bitflip_check(ubi, pnum, 1); + break; + } + + case UBI_IOCECNFO: + { + err = ubi_get_ec_info(ubi, argp); + break; + } + default: err = -ENOTTY; break; @@ -1024,7 +1111,8 @@ static long ctrl_cdev_ioctl(struct file *file, unsigned int cmd, */ mutex_lock(&ubi_devices_mutex); err = ubi_attach_mtd_dev(mtd, req.ubi_num, req.vid_hdr_offset, - req.max_beb_per1024); + req.max_beb_per1024, !!req.disable_fm, + !!req.need_resv_pool); mutex_unlock(&ubi_devices_mutex); if (err < 0) put_mtd_device(mtd); @@ -1061,36 +1149,6 @@ static long ctrl_cdev_ioctl(struct file *file, unsigned int cmd, return err; } -#ifdef CONFIG_COMPAT -static long vol_cdev_compat_ioctl(struct file *file, unsigned int cmd, - unsigned long arg) -{ - unsigned long translated_arg = (unsigned long)compat_ptr(arg); - - return vol_cdev_ioctl(file, cmd, translated_arg); -} - -static long ubi_cdev_compat_ioctl(struct file *file, unsigned int cmd, - unsigned long arg) -{ - unsigned long translated_arg = (unsigned long)compat_ptr(arg); - - return ubi_cdev_ioctl(file, cmd, translated_arg); -} - -static long ctrl_cdev_compat_ioctl(struct file *file, unsigned int cmd, - unsigned long arg) -{ - unsigned long translated_arg = (unsigned long)compat_ptr(arg); - - return ctrl_cdev_ioctl(file, cmd, translated_arg); -} -#else -#define vol_cdev_compat_ioctl NULL -#define ubi_cdev_compat_ioctl NULL -#define ctrl_cdev_compat_ioctl NULL -#endif - /* UBI volume character device operations */ const struct file_operations ubi_vol_cdev_operations = { .owner = THIS_MODULE, @@ -1101,21 +1159,19 @@ const struct file_operations ubi_vol_cdev_operations = { .write = vol_cdev_write, .fsync = vol_cdev_fsync, .unlocked_ioctl = vol_cdev_ioctl, - .compat_ioctl = vol_cdev_compat_ioctl, + .compat_ioctl = compat_ptr_ioctl, }; /* UBI character device operations */ const struct file_operations ubi_cdev_operations = { .owner = THIS_MODULE, - .llseek = no_llseek, .unlocked_ioctl = ubi_cdev_ioctl, - .compat_ioctl = ubi_cdev_compat_ioctl, + .compat_ioctl = compat_ptr_ioctl, }; /* UBI control character device operations */ const struct file_operations ubi_ctrl_cdev_operations = { .owner = THIS_MODULE, .unlocked_ioctl = ctrl_cdev_ioctl, - .compat_ioctl = ctrl_cdev_compat_ioctl, - .llseek = no_llseek, + .compat_ioctl = compat_ptr_ioctl, }; |