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https://github.com/brain-hackers/u-boot-brain
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![Heiko Schocher](/assets/img/avatar_default.png)
resync ubi subsystem with linux: commit 455c6fdbd219161bd09b1165f11699d6d73de11c Author: Linus Torvalds <torvalds@linux-foundation.org> Date: Sun Mar 30 20:40:15 2014 -0700 Linux 3.14 A nice side effect of this, is we introduce UBI Fastmap support to U-Boot. Signed-off-by: Heiko Schocher <hs@denx.de> Signed-off-by: Tom Rini <trini@ti.com> Cc: Marek Vasut <marex@denx.de> Cc: Sergey Lapin <slapin@ossfans.org> Cc: Scott Wood <scottwood@freescale.com> Cc: Joerg Krause <jkrause@posteo.de>
860 lines
22 KiB
C
860 lines
22 KiB
C
/*
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* Copyright (c) International Business Machines Corp., 2006
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*
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* SPDX-License-Identifier: GPL-2.0+
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*
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* Author: Artem Bityutskiy (Битюцкий Артём)
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*/
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/*
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* This file contains implementation of volume creation, deletion, updating and
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* resizing.
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*/
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#define __UBOOT__
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#ifndef __UBOOT__
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#include <linux/err.h>
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#include <linux/slab.h>
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#include <linux/export.h>
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#else
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#include <div64.h>
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#include <ubi_uboot.h>
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#endif
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#include <linux/math64.h>
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#include "ubi.h"
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static int self_check_volumes(struct ubi_device *ubi);
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#ifndef __UBOOT__
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static ssize_t vol_attribute_show(struct device *dev,
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struct device_attribute *attr, char *buf);
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/* Device attributes corresponding to files in '/<sysfs>/class/ubi/ubiX_Y' */
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static struct device_attribute attr_vol_reserved_ebs =
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__ATTR(reserved_ebs, S_IRUGO, vol_attribute_show, NULL);
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static struct device_attribute attr_vol_type =
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__ATTR(type, S_IRUGO, vol_attribute_show, NULL);
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static struct device_attribute attr_vol_name =
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__ATTR(name, S_IRUGO, vol_attribute_show, NULL);
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static struct device_attribute attr_vol_corrupted =
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__ATTR(corrupted, S_IRUGO, vol_attribute_show, NULL);
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static struct device_attribute attr_vol_alignment =
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__ATTR(alignment, S_IRUGO, vol_attribute_show, NULL);
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static struct device_attribute attr_vol_usable_eb_size =
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__ATTR(usable_eb_size, S_IRUGO, vol_attribute_show, NULL);
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static struct device_attribute attr_vol_data_bytes =
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__ATTR(data_bytes, S_IRUGO, vol_attribute_show, NULL);
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static struct device_attribute attr_vol_upd_marker =
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__ATTR(upd_marker, S_IRUGO, vol_attribute_show, NULL);
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/*
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* "Show" method for files in '/<sysfs>/class/ubi/ubiX_Y/'.
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*
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* Consider a situation:
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* A. process 1 opens a sysfs file related to volume Y, say
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* /<sysfs>/class/ubi/ubiX_Y/reserved_ebs;
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* B. process 2 removes volume Y;
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* C. process 1 starts reading the /<sysfs>/class/ubi/ubiX_Y/reserved_ebs file;
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*
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* In this situation, this function will return %-ENODEV because it will find
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* out that the volume was removed from the @ubi->volumes array.
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*/
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static ssize_t vol_attribute_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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int ret;
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struct ubi_volume *vol = container_of(dev, struct ubi_volume, dev);
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struct ubi_device *ubi;
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ubi = ubi_get_device(vol->ubi->ubi_num);
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if (!ubi)
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return -ENODEV;
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spin_lock(&ubi->volumes_lock);
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if (!ubi->volumes[vol->vol_id]) {
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spin_unlock(&ubi->volumes_lock);
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ubi_put_device(ubi);
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return -ENODEV;
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}
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/* Take a reference to prevent volume removal */
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vol->ref_count += 1;
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spin_unlock(&ubi->volumes_lock);
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if (attr == &attr_vol_reserved_ebs)
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ret = sprintf(buf, "%d\n", vol->reserved_pebs);
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else if (attr == &attr_vol_type) {
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const char *tp;
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if (vol->vol_type == UBI_DYNAMIC_VOLUME)
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tp = "dynamic";
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else
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tp = "static";
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ret = sprintf(buf, "%s\n", tp);
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} else if (attr == &attr_vol_name)
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ret = sprintf(buf, "%s\n", vol->name);
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else if (attr == &attr_vol_corrupted)
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ret = sprintf(buf, "%d\n", vol->corrupted);
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else if (attr == &attr_vol_alignment)
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ret = sprintf(buf, "%d\n", vol->alignment);
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else if (attr == &attr_vol_usable_eb_size)
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ret = sprintf(buf, "%d\n", vol->usable_leb_size);
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else if (attr == &attr_vol_data_bytes)
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ret = sprintf(buf, "%lld\n", vol->used_bytes);
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else if (attr == &attr_vol_upd_marker)
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ret = sprintf(buf, "%d\n", vol->upd_marker);
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else
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/* This must be a bug */
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ret = -EINVAL;
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/* We've done the operation, drop volume and UBI device references */
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spin_lock(&ubi->volumes_lock);
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vol->ref_count -= 1;
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ubi_assert(vol->ref_count >= 0);
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spin_unlock(&ubi->volumes_lock);
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ubi_put_device(ubi);
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return ret;
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}
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#endif
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/* Release method for volume devices */
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static void vol_release(struct device *dev)
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{
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struct ubi_volume *vol = container_of(dev, struct ubi_volume, dev);
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kfree(vol->eba_tbl);
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kfree(vol);
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}
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#ifndef __UBOOT__
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/**
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* volume_sysfs_init - initialize sysfs for new volume.
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* @ubi: UBI device description object
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* @vol: volume description object
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*
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* This function returns zero in case of success and a negative error code in
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* case of failure.
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*
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* Note, this function does not free allocated resources in case of failure -
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* the caller does it. This is because this would cause release() here and the
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* caller would oops.
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*/
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static int volume_sysfs_init(struct ubi_device *ubi, struct ubi_volume *vol)
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{
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int err;
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err = device_create_file(&vol->dev, &attr_vol_reserved_ebs);
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if (err)
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return err;
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err = device_create_file(&vol->dev, &attr_vol_type);
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if (err)
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return err;
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err = device_create_file(&vol->dev, &attr_vol_name);
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if (err)
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return err;
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err = device_create_file(&vol->dev, &attr_vol_corrupted);
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if (err)
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return err;
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err = device_create_file(&vol->dev, &attr_vol_alignment);
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if (err)
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return err;
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err = device_create_file(&vol->dev, &attr_vol_usable_eb_size);
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if (err)
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return err;
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err = device_create_file(&vol->dev, &attr_vol_data_bytes);
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if (err)
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return err;
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err = device_create_file(&vol->dev, &attr_vol_upd_marker);
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return err;
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}
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/**
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* volume_sysfs_close - close sysfs for a volume.
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* @vol: volume description object
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*/
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static void volume_sysfs_close(struct ubi_volume *vol)
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{
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device_remove_file(&vol->dev, &attr_vol_upd_marker);
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device_remove_file(&vol->dev, &attr_vol_data_bytes);
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device_remove_file(&vol->dev, &attr_vol_usable_eb_size);
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device_remove_file(&vol->dev, &attr_vol_alignment);
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device_remove_file(&vol->dev, &attr_vol_corrupted);
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device_remove_file(&vol->dev, &attr_vol_name);
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device_remove_file(&vol->dev, &attr_vol_type);
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device_remove_file(&vol->dev, &attr_vol_reserved_ebs);
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device_unregister(&vol->dev);
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}
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#endif
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/**
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* ubi_create_volume - create volume.
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* @ubi: UBI device description object
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* @req: volume creation request
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*
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* This function creates volume described by @req. If @req->vol_id id
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* %UBI_VOL_NUM_AUTO, this function automatically assign ID to the new volume
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* and saves it in @req->vol_id. Returns zero in case of success and a negative
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* error code in case of failure. Note, the caller has to have the
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* @ubi->device_mutex locked.
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*/
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int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req)
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{
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int i, err, vol_id = req->vol_id, do_free = 1;
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struct ubi_volume *vol;
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struct ubi_vtbl_record vtbl_rec;
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dev_t dev;
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if (ubi->ro_mode)
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return -EROFS;
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vol = kzalloc(sizeof(struct ubi_volume), GFP_KERNEL);
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if (!vol)
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return -ENOMEM;
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spin_lock(&ubi->volumes_lock);
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if (vol_id == UBI_VOL_NUM_AUTO) {
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/* Find unused volume ID */
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dbg_gen("search for vacant volume ID");
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for (i = 0; i < ubi->vtbl_slots; i++)
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if (!ubi->volumes[i]) {
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vol_id = i;
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break;
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}
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if (vol_id == UBI_VOL_NUM_AUTO) {
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ubi_err("out of volume IDs");
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err = -ENFILE;
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goto out_unlock;
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}
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req->vol_id = vol_id;
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}
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dbg_gen("create device %d, volume %d, %llu bytes, type %d, name %s",
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ubi->ubi_num, vol_id, (unsigned long long)req->bytes,
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(int)req->vol_type, req->name);
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/* Ensure that this volume does not exist */
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err = -EEXIST;
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if (ubi->volumes[vol_id]) {
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ubi_err("volume %d already exists", vol_id);
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goto out_unlock;
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}
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/* Ensure that the name is unique */
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for (i = 0; i < ubi->vtbl_slots; i++)
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if (ubi->volumes[i] &&
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ubi->volumes[i]->name_len == req->name_len &&
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!strcmp(ubi->volumes[i]->name, req->name)) {
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ubi_err("volume \"%s\" exists (ID %d)", req->name, i);
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goto out_unlock;
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}
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/* Calculate how many eraseblocks are requested */
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vol->usable_leb_size = ubi->leb_size - ubi->leb_size % req->alignment;
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vol->reserved_pebs += div_u64(req->bytes + vol->usable_leb_size - 1,
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vol->usable_leb_size);
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/* Reserve physical eraseblocks */
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if (vol->reserved_pebs > ubi->avail_pebs) {
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ubi_err("not enough PEBs, only %d available", ubi->avail_pebs);
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if (ubi->corr_peb_count)
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ubi_err("%d PEBs are corrupted and not used",
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ubi->corr_peb_count);
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err = -ENOSPC;
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goto out_unlock;
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}
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ubi->avail_pebs -= vol->reserved_pebs;
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ubi->rsvd_pebs += vol->reserved_pebs;
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spin_unlock(&ubi->volumes_lock);
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vol->vol_id = vol_id;
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vol->alignment = req->alignment;
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vol->data_pad = ubi->leb_size % vol->alignment;
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vol->vol_type = req->vol_type;
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vol->name_len = req->name_len;
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memcpy(vol->name, req->name, vol->name_len);
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vol->ubi = ubi;
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/*
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* Finish all pending erases because there may be some LEBs belonging
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* to the same volume ID.
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*/
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err = ubi_wl_flush(ubi, vol_id, UBI_ALL);
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if (err)
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goto out_acc;
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vol->eba_tbl = kmalloc(vol->reserved_pebs * sizeof(int), GFP_KERNEL);
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if (!vol->eba_tbl) {
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err = -ENOMEM;
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goto out_acc;
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}
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for (i = 0; i < vol->reserved_pebs; i++)
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vol->eba_tbl[i] = UBI_LEB_UNMAPPED;
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if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
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vol->used_ebs = vol->reserved_pebs;
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vol->last_eb_bytes = vol->usable_leb_size;
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vol->used_bytes =
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(long long)vol->used_ebs * vol->usable_leb_size;
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} else {
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vol->used_ebs = div_u64_rem(vol->used_bytes,
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vol->usable_leb_size,
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&vol->last_eb_bytes);
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if (vol->last_eb_bytes != 0)
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vol->used_ebs += 1;
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else
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vol->last_eb_bytes = vol->usable_leb_size;
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}
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/* Register character device for the volume */
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cdev_init(&vol->cdev, &ubi_vol_cdev_operations);
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vol->cdev.owner = THIS_MODULE;
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dev = MKDEV(MAJOR(ubi->cdev.dev), vol_id + 1);
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err = cdev_add(&vol->cdev, dev, 1);
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if (err) {
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ubi_err("cannot add character device");
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goto out_mapping;
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}
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vol->dev.release = vol_release;
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vol->dev.parent = &ubi->dev;
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vol->dev.devt = dev;
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vol->dev.class = ubi_class;
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dev_set_name(&vol->dev, "%s_%d", ubi->ubi_name, vol->vol_id);
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err = device_register(&vol->dev);
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if (err) {
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ubi_err("cannot register device");
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goto out_cdev;
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}
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err = volume_sysfs_init(ubi, vol);
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if (err)
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goto out_sysfs;
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/* Fill volume table record */
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memset(&vtbl_rec, 0, sizeof(struct ubi_vtbl_record));
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vtbl_rec.reserved_pebs = cpu_to_be32(vol->reserved_pebs);
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vtbl_rec.alignment = cpu_to_be32(vol->alignment);
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vtbl_rec.data_pad = cpu_to_be32(vol->data_pad);
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vtbl_rec.name_len = cpu_to_be16(vol->name_len);
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if (vol->vol_type == UBI_DYNAMIC_VOLUME)
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vtbl_rec.vol_type = UBI_VID_DYNAMIC;
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else
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vtbl_rec.vol_type = UBI_VID_STATIC;
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memcpy(vtbl_rec.name, vol->name, vol->name_len);
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err = ubi_change_vtbl_record(ubi, vol_id, &vtbl_rec);
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if (err)
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goto out_sysfs;
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spin_lock(&ubi->volumes_lock);
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ubi->volumes[vol_id] = vol;
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ubi->vol_count += 1;
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spin_unlock(&ubi->volumes_lock);
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ubi_volume_notify(ubi, vol, UBI_VOLUME_ADDED);
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self_check_volumes(ubi);
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return err;
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out_sysfs:
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/*
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* We have registered our device, we should not free the volume
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* description object in this function in case of an error - it is
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* freed by the release function.
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*
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* Get device reference to prevent the release function from being
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* called just after sysfs has been closed.
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*/
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do_free = 0;
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get_device(&vol->dev);
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volume_sysfs_close(vol);
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out_cdev:
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cdev_del(&vol->cdev);
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out_mapping:
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if (do_free)
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kfree(vol->eba_tbl);
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out_acc:
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spin_lock(&ubi->volumes_lock);
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ubi->rsvd_pebs -= vol->reserved_pebs;
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ubi->avail_pebs += vol->reserved_pebs;
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out_unlock:
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spin_unlock(&ubi->volumes_lock);
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if (do_free)
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kfree(vol);
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else
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put_device(&vol->dev);
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ubi_err("cannot create volume %d, error %d", vol_id, err);
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return err;
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}
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/**
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* ubi_remove_volume - remove volume.
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* @desc: volume descriptor
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* @no_vtbl: do not change volume table if not zero
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*
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* This function removes volume described by @desc. The volume has to be opened
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* in "exclusive" mode. Returns zero in case of success and a negative error
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* code in case of failure. The caller has to have the @ubi->device_mutex
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* locked.
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*/
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int ubi_remove_volume(struct ubi_volume_desc *desc, int no_vtbl)
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{
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struct ubi_volume *vol = desc->vol;
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struct ubi_device *ubi = vol->ubi;
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int i, err, vol_id = vol->vol_id, reserved_pebs = vol->reserved_pebs;
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dbg_gen("remove device %d, volume %d", ubi->ubi_num, vol_id);
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ubi_assert(desc->mode == UBI_EXCLUSIVE);
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ubi_assert(vol == ubi->volumes[vol_id]);
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if (ubi->ro_mode)
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return -EROFS;
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spin_lock(&ubi->volumes_lock);
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if (vol->ref_count > 1) {
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/*
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* The volume is busy, probably someone is reading one of its
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* sysfs files.
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*/
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err = -EBUSY;
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goto out_unlock;
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}
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ubi->volumes[vol_id] = NULL;
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spin_unlock(&ubi->volumes_lock);
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if (!no_vtbl) {
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err = ubi_change_vtbl_record(ubi, vol_id, NULL);
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if (err)
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goto out_err;
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}
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for (i = 0; i < vol->reserved_pebs; i++) {
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err = ubi_eba_unmap_leb(ubi, vol, i);
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if (err)
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goto out_err;
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}
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cdev_del(&vol->cdev);
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volume_sysfs_close(vol);
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spin_lock(&ubi->volumes_lock);
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ubi->rsvd_pebs -= reserved_pebs;
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ubi->avail_pebs += reserved_pebs;
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ubi_update_reserved(ubi);
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ubi->vol_count -= 1;
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spin_unlock(&ubi->volumes_lock);
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ubi_volume_notify(ubi, vol, UBI_VOLUME_REMOVED);
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if (!no_vtbl)
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self_check_volumes(ubi);
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return err;
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out_err:
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ubi_err("cannot remove volume %d, error %d", vol_id, err);
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spin_lock(&ubi->volumes_lock);
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ubi->volumes[vol_id] = vol;
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out_unlock:
|
|
spin_unlock(&ubi->volumes_lock);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ubi_resize_volume - re-size volume.
|
|
* @desc: volume descriptor
|
|
* @reserved_pebs: new size in physical eraseblocks
|
|
*
|
|
* This function re-sizes the volume and returns zero in case of success, and a
|
|
* negative error code in case of failure. The caller has to have the
|
|
* @ubi->device_mutex locked.
|
|
*/
|
|
int ubi_resize_volume(struct ubi_volume_desc *desc, int reserved_pebs)
|
|
{
|
|
int i, err, pebs, *new_mapping;
|
|
struct ubi_volume *vol = desc->vol;
|
|
struct ubi_device *ubi = vol->ubi;
|
|
struct ubi_vtbl_record vtbl_rec;
|
|
int vol_id = vol->vol_id;
|
|
|
|
if (ubi->ro_mode)
|
|
return -EROFS;
|
|
|
|
dbg_gen("re-size device %d, volume %d to from %d to %d PEBs",
|
|
ubi->ubi_num, vol_id, vol->reserved_pebs, reserved_pebs);
|
|
|
|
if (vol->vol_type == UBI_STATIC_VOLUME &&
|
|
reserved_pebs < vol->used_ebs) {
|
|
ubi_err("too small size %d, %d LEBs contain data",
|
|
reserved_pebs, vol->used_ebs);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* If the size is the same, we have nothing to do */
|
|
if (reserved_pebs == vol->reserved_pebs)
|
|
return 0;
|
|
|
|
new_mapping = kmalloc(reserved_pebs * sizeof(int), GFP_KERNEL);
|
|
if (!new_mapping)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < reserved_pebs; i++)
|
|
new_mapping[i] = UBI_LEB_UNMAPPED;
|
|
|
|
spin_lock(&ubi->volumes_lock);
|
|
if (vol->ref_count > 1) {
|
|
spin_unlock(&ubi->volumes_lock);
|
|
err = -EBUSY;
|
|
goto out_free;
|
|
}
|
|
spin_unlock(&ubi->volumes_lock);
|
|
|
|
/* Reserve physical eraseblocks */
|
|
pebs = reserved_pebs - vol->reserved_pebs;
|
|
if (pebs > 0) {
|
|
spin_lock(&ubi->volumes_lock);
|
|
if (pebs > ubi->avail_pebs) {
|
|
ubi_err("not enough PEBs: requested %d, available %d",
|
|
pebs, ubi->avail_pebs);
|
|
if (ubi->corr_peb_count)
|
|
ubi_err("%d PEBs are corrupted and not used",
|
|
ubi->corr_peb_count);
|
|
spin_unlock(&ubi->volumes_lock);
|
|
err = -ENOSPC;
|
|
goto out_free;
|
|
}
|
|
ubi->avail_pebs -= pebs;
|
|
ubi->rsvd_pebs += pebs;
|
|
for (i = 0; i < vol->reserved_pebs; i++)
|
|
new_mapping[i] = vol->eba_tbl[i];
|
|
kfree(vol->eba_tbl);
|
|
vol->eba_tbl = new_mapping;
|
|
spin_unlock(&ubi->volumes_lock);
|
|
}
|
|
|
|
/* Change volume table record */
|
|
vtbl_rec = ubi->vtbl[vol_id];
|
|
vtbl_rec.reserved_pebs = cpu_to_be32(reserved_pebs);
|
|
err = ubi_change_vtbl_record(ubi, vol_id, &vtbl_rec);
|
|
if (err)
|
|
goto out_acc;
|
|
|
|
if (pebs < 0) {
|
|
for (i = 0; i < -pebs; i++) {
|
|
err = ubi_eba_unmap_leb(ubi, vol, reserved_pebs + i);
|
|
if (err)
|
|
goto out_acc;
|
|
}
|
|
spin_lock(&ubi->volumes_lock);
|
|
ubi->rsvd_pebs += pebs;
|
|
ubi->avail_pebs -= pebs;
|
|
ubi_update_reserved(ubi);
|
|
for (i = 0; i < reserved_pebs; i++)
|
|
new_mapping[i] = vol->eba_tbl[i];
|
|
kfree(vol->eba_tbl);
|
|
vol->eba_tbl = new_mapping;
|
|
spin_unlock(&ubi->volumes_lock);
|
|
}
|
|
|
|
vol->reserved_pebs = reserved_pebs;
|
|
if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
|
|
vol->used_ebs = reserved_pebs;
|
|
vol->last_eb_bytes = vol->usable_leb_size;
|
|
vol->used_bytes =
|
|
(long long)vol->used_ebs * vol->usable_leb_size;
|
|
}
|
|
|
|
ubi_volume_notify(ubi, vol, UBI_VOLUME_RESIZED);
|
|
self_check_volumes(ubi);
|
|
return err;
|
|
|
|
out_acc:
|
|
if (pebs > 0) {
|
|
spin_lock(&ubi->volumes_lock);
|
|
ubi->rsvd_pebs -= pebs;
|
|
ubi->avail_pebs += pebs;
|
|
spin_unlock(&ubi->volumes_lock);
|
|
}
|
|
out_free:
|
|
kfree(new_mapping);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ubi_rename_volumes - re-name UBI volumes.
|
|
* @ubi: UBI device description object
|
|
* @rename_list: list of &struct ubi_rename_entry objects
|
|
*
|
|
* This function re-names or removes volumes specified in the re-name list.
|
|
* Returns zero in case of success and a negative error code in case of
|
|
* failure.
|
|
*/
|
|
int ubi_rename_volumes(struct ubi_device *ubi, struct list_head *rename_list)
|
|
{
|
|
int err;
|
|
struct ubi_rename_entry *re;
|
|
|
|
err = ubi_vtbl_rename_volumes(ubi, rename_list);
|
|
if (err)
|
|
return err;
|
|
|
|
list_for_each_entry(re, rename_list, list) {
|
|
if (re->remove) {
|
|
err = ubi_remove_volume(re->desc, 1);
|
|
if (err)
|
|
break;
|
|
} else {
|
|
struct ubi_volume *vol = re->desc->vol;
|
|
|
|
spin_lock(&ubi->volumes_lock);
|
|
vol->name_len = re->new_name_len;
|
|
memcpy(vol->name, re->new_name, re->new_name_len + 1);
|
|
spin_unlock(&ubi->volumes_lock);
|
|
ubi_volume_notify(ubi, vol, UBI_VOLUME_RENAMED);
|
|
}
|
|
}
|
|
|
|
if (!err)
|
|
self_check_volumes(ubi);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ubi_add_volume - add volume.
|
|
* @ubi: UBI device description object
|
|
* @vol: volume description object
|
|
*
|
|
* This function adds an existing volume and initializes all its data
|
|
* structures. Returns zero in case of success and a negative error code in
|
|
* case of failure.
|
|
*/
|
|
int ubi_add_volume(struct ubi_device *ubi, struct ubi_volume *vol)
|
|
{
|
|
int err, vol_id = vol->vol_id;
|
|
dev_t dev;
|
|
|
|
dbg_gen("add volume %d", vol_id);
|
|
|
|
/* Register character device for the volume */
|
|
cdev_init(&vol->cdev, &ubi_vol_cdev_operations);
|
|
vol->cdev.owner = THIS_MODULE;
|
|
dev = MKDEV(MAJOR(ubi->cdev.dev), vol->vol_id + 1);
|
|
err = cdev_add(&vol->cdev, dev, 1);
|
|
if (err) {
|
|
ubi_err("cannot add character device for volume %d, error %d",
|
|
vol_id, err);
|
|
return err;
|
|
}
|
|
|
|
vol->dev.release = vol_release;
|
|
vol->dev.parent = &ubi->dev;
|
|
vol->dev.devt = dev;
|
|
vol->dev.class = ubi_class;
|
|
dev_set_name(&vol->dev, "%s_%d", ubi->ubi_name, vol->vol_id);
|
|
err = device_register(&vol->dev);
|
|
if (err)
|
|
goto out_cdev;
|
|
|
|
err = volume_sysfs_init(ubi, vol);
|
|
if (err) {
|
|
cdev_del(&vol->cdev);
|
|
volume_sysfs_close(vol);
|
|
return err;
|
|
}
|
|
|
|
self_check_volumes(ubi);
|
|
return err;
|
|
|
|
out_cdev:
|
|
cdev_del(&vol->cdev);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ubi_free_volume - free volume.
|
|
* @ubi: UBI device description object
|
|
* @vol: volume description object
|
|
*
|
|
* This function frees all resources for volume @vol but does not remove it.
|
|
* Used only when the UBI device is detached.
|
|
*/
|
|
void ubi_free_volume(struct ubi_device *ubi, struct ubi_volume *vol)
|
|
{
|
|
dbg_gen("free volume %d", vol->vol_id);
|
|
|
|
ubi->volumes[vol->vol_id] = NULL;
|
|
cdev_del(&vol->cdev);
|
|
volume_sysfs_close(vol);
|
|
}
|
|
|
|
/**
|
|
* self_check_volume - check volume information.
|
|
* @ubi: UBI device description object
|
|
* @vol_id: volume ID
|
|
*
|
|
* Returns zero if volume is all right and a a negative error code if not.
|
|
*/
|
|
static int self_check_volume(struct ubi_device *ubi, int vol_id)
|
|
{
|
|
int idx = vol_id2idx(ubi, vol_id);
|
|
int reserved_pebs, alignment, data_pad, vol_type, name_len, upd_marker;
|
|
const struct ubi_volume *vol;
|
|
long long n;
|
|
const char *name;
|
|
|
|
spin_lock(&ubi->volumes_lock);
|
|
reserved_pebs = be32_to_cpu(ubi->vtbl[vol_id].reserved_pebs);
|
|
vol = ubi->volumes[idx];
|
|
|
|
if (!vol) {
|
|
if (reserved_pebs) {
|
|
ubi_err("no volume info, but volume exists");
|
|
goto fail;
|
|
}
|
|
spin_unlock(&ubi->volumes_lock);
|
|
return 0;
|
|
}
|
|
|
|
if (vol->reserved_pebs < 0 || vol->alignment < 0 || vol->data_pad < 0 ||
|
|
vol->name_len < 0) {
|
|
ubi_err("negative values");
|
|
goto fail;
|
|
}
|
|
if (vol->alignment > ubi->leb_size || vol->alignment == 0) {
|
|
ubi_err("bad alignment");
|
|
goto fail;
|
|
}
|
|
|
|
n = vol->alignment & (ubi->min_io_size - 1);
|
|
if (vol->alignment != 1 && n) {
|
|
ubi_err("alignment is not multiple of min I/O unit");
|
|
goto fail;
|
|
}
|
|
|
|
n = ubi->leb_size % vol->alignment;
|
|
if (vol->data_pad != n) {
|
|
ubi_err("bad data_pad, has to be %lld", n);
|
|
goto fail;
|
|
}
|
|
|
|
if (vol->vol_type != UBI_DYNAMIC_VOLUME &&
|
|
vol->vol_type != UBI_STATIC_VOLUME) {
|
|
ubi_err("bad vol_type");
|
|
goto fail;
|
|
}
|
|
|
|
if (vol->upd_marker && vol->corrupted) {
|
|
ubi_err("update marker and corrupted simultaneously");
|
|
goto fail;
|
|
}
|
|
|
|
if (vol->reserved_pebs > ubi->good_peb_count) {
|
|
ubi_err("too large reserved_pebs");
|
|
goto fail;
|
|
}
|
|
|
|
n = ubi->leb_size - vol->data_pad;
|
|
if (vol->usable_leb_size != ubi->leb_size - vol->data_pad) {
|
|
ubi_err("bad usable_leb_size, has to be %lld", n);
|
|
goto fail;
|
|
}
|
|
|
|
if (vol->name_len > UBI_VOL_NAME_MAX) {
|
|
ubi_err("too long volume name, max is %d", UBI_VOL_NAME_MAX);
|
|
goto fail;
|
|
}
|
|
|
|
n = strnlen(vol->name, vol->name_len + 1);
|
|
if (n != vol->name_len) {
|
|
ubi_err("bad name_len %lld", n);
|
|
goto fail;
|
|
}
|
|
|
|
n = (long long)vol->used_ebs * vol->usable_leb_size;
|
|
if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
|
|
if (vol->corrupted) {
|
|
ubi_err("corrupted dynamic volume");
|
|
goto fail;
|
|
}
|
|
if (vol->used_ebs != vol->reserved_pebs) {
|
|
ubi_err("bad used_ebs");
|
|
goto fail;
|
|
}
|
|
if (vol->last_eb_bytes != vol->usable_leb_size) {
|
|
ubi_err("bad last_eb_bytes");
|
|
goto fail;
|
|
}
|
|
if (vol->used_bytes != n) {
|
|
ubi_err("bad used_bytes");
|
|
goto fail;
|
|
}
|
|
} else {
|
|
if (vol->used_ebs < 0 || vol->used_ebs > vol->reserved_pebs) {
|
|
ubi_err("bad used_ebs");
|
|
goto fail;
|
|
}
|
|
if (vol->last_eb_bytes < 0 ||
|
|
vol->last_eb_bytes > vol->usable_leb_size) {
|
|
ubi_err("bad last_eb_bytes");
|
|
goto fail;
|
|
}
|
|
if (vol->used_bytes < 0 || vol->used_bytes > n ||
|
|
vol->used_bytes < n - vol->usable_leb_size) {
|
|
ubi_err("bad used_bytes");
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
alignment = be32_to_cpu(ubi->vtbl[vol_id].alignment);
|
|
data_pad = be32_to_cpu(ubi->vtbl[vol_id].data_pad);
|
|
name_len = be16_to_cpu(ubi->vtbl[vol_id].name_len);
|
|
upd_marker = ubi->vtbl[vol_id].upd_marker;
|
|
name = &ubi->vtbl[vol_id].name[0];
|
|
if (ubi->vtbl[vol_id].vol_type == UBI_VID_DYNAMIC)
|
|
vol_type = UBI_DYNAMIC_VOLUME;
|
|
else
|
|
vol_type = UBI_STATIC_VOLUME;
|
|
|
|
if (alignment != vol->alignment || data_pad != vol->data_pad ||
|
|
upd_marker != vol->upd_marker || vol_type != vol->vol_type ||
|
|
name_len != vol->name_len || strncmp(name, vol->name, name_len)) {
|
|
ubi_err("volume info is different");
|
|
goto fail;
|
|
}
|
|
|
|
spin_unlock(&ubi->volumes_lock);
|
|
return 0;
|
|
|
|
fail:
|
|
ubi_err("self-check failed for volume %d", vol_id);
|
|
if (vol)
|
|
ubi_dump_vol_info(vol);
|
|
ubi_dump_vtbl_record(&ubi->vtbl[vol_id], vol_id);
|
|
dump_stack();
|
|
spin_unlock(&ubi->volumes_lock);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/**
|
|
* self_check_volumes - check information about all volumes.
|
|
* @ubi: UBI device description object
|
|
*
|
|
* Returns zero if volumes are all right and a a negative error code if not.
|
|
*/
|
|
static int self_check_volumes(struct ubi_device *ubi)
|
|
{
|
|
int i, err = 0;
|
|
|
|
if (!ubi_dbg_chk_gen(ubi))
|
|
return 0;
|
|
|
|
for (i = 0; i < ubi->vtbl_slots; i++) {
|
|
err = self_check_volume(ubi, i);
|
|
if (err)
|
|
break;
|
|
}
|
|
|
|
return err;
|
|
}
|