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802 lines
21 KiB
802 lines
21 KiB
// 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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* Author: Artem Bityutskiy (Битюцкий Артём) |
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*/ |
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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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|
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#include <linux/err.h> |
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#include <linux/math64.h> |
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#include <linux/slab.h> |
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#include <linux/export.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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|
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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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/* 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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/* |
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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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static struct attribute *volume_dev_attrs[] = { |
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&attr_vol_reserved_ebs.attr, |
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&attr_vol_type.attr, |
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&attr_vol_name.attr, |
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&attr_vol_corrupted.attr, |
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&attr_vol_alignment.attr, |
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&attr_vol_usable_eb_size.attr, |
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&attr_vol_data_bytes.attr, |
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&attr_vol_upd_marker.attr, |
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NULL |
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}; |
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ATTRIBUTE_GROUPS(volume_dev); |
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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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ubi_eba_replace_table(vol, NULL); |
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ubi_fastmap_destroy_checkmap(vol); |
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kfree(vol); |
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} |
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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; |
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struct ubi_volume *vol; |
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struct ubi_vtbl_record vtbl_rec; |
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struct ubi_eba_table *eba_tbl = NULL; |
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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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device_initialize(&vol->dev); |
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vol->dev.release = vol_release; |
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vol->dev.parent = &ubi->dev; |
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vol->dev.class = &ubi_class; |
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vol->dev.groups = volume_dev_groups; |
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if (req->flags & UBI_VOL_SKIP_CRC_CHECK_FLG) |
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vol->skip_check = 1; |
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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(ubi, "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(ubi, "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(ubi, "volume \"%s\" exists (ID %d)", |
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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(ubi, "not enough PEBs, only %d available", |
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ubi->avail_pebs); |
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if (ubi->corr_peb_count) |
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ubi_err(ubi, "%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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eba_tbl = ubi_eba_create_table(vol, vol->reserved_pebs); |
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if (IS_ERR(eba_tbl)) { |
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err = PTR_ERR(eba_tbl); |
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goto out_acc; |
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} |
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ubi_eba_replace_table(vol, eba_tbl); |
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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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/* Make volume "available" before it becomes accessible via 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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/* 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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vol->dev.devt = MKDEV(MAJOR(ubi->cdev.dev), vol_id + 1); |
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dev_set_name(&vol->dev, "%s_%d", ubi->ubi_name, vol->vol_id); |
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err = cdev_device_add(&vol->cdev, &vol->dev); |
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if (err) { |
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ubi_err(ubi, "cannot add device"); |
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goto out_mapping; |
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} |
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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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if (vol->skip_check) |
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vtbl_rec.flags |= UBI_VTBL_SKIP_CRC_CHECK_FLG; |
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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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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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cdev_device_del(&vol->cdev, &vol->dev); |
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out_mapping: |
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spin_lock(&ubi->volumes_lock); |
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ubi->volumes[vol_id] = NULL; |
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ubi->vol_count -= 1; |
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spin_unlock(&ubi->volumes_lock); |
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ubi_eba_destroy_table(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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put_device(&vol->dev); |
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ubi_err(ubi, "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_device_del(&vol->cdev, &vol->dev); |
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put_device(&vol->dev); |
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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 0; |
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out_err: |
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ubi_err(ubi, "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: |
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spin_unlock(&ubi->volumes_lock); |
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return err; |
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} |
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/** |
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* ubi_resize_volume - re-size volume. |
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* @desc: volume descriptor |
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* @reserved_pebs: new size in physical eraseblocks |
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* |
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* This function re-sizes the volume and returns zero in case of success, and a |
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* negative error code in case of failure. The caller has to have the |
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* @ubi->device_mutex locked. |
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*/ |
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int ubi_resize_volume(struct ubi_volume_desc *desc, int reserved_pebs) |
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{ |
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int i, err, pebs; |
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struct ubi_volume *vol = desc->vol; |
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struct ubi_device *ubi = vol->ubi; |
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struct ubi_vtbl_record vtbl_rec; |
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struct ubi_eba_table *new_eba_tbl = NULL; |
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int vol_id = vol->vol_id; |
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|
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if (ubi->ro_mode) |
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return -EROFS; |
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dbg_gen("re-size device %d, volume %d to from %d to %d PEBs", |
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ubi->ubi_num, vol_id, vol->reserved_pebs, reserved_pebs); |
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|
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if (vol->vol_type == UBI_STATIC_VOLUME && |
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reserved_pebs < vol->used_ebs) { |
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ubi_err(ubi, "too small size %d, %d LEBs contain data", |
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reserved_pebs, vol->used_ebs); |
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return -EINVAL; |
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} |
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/* If the size is the same, we have nothing to do */ |
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if (reserved_pebs == vol->reserved_pebs) |
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return 0; |
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new_eba_tbl = ubi_eba_create_table(vol, reserved_pebs); |
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if (IS_ERR(new_eba_tbl)) |
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return PTR_ERR(new_eba_tbl); |
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spin_lock(&ubi->volumes_lock); |
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if (vol->ref_count > 1) { |
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spin_unlock(&ubi->volumes_lock); |
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err = -EBUSY; |
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goto out_free; |
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} |
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spin_unlock(&ubi->volumes_lock); |
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|
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/* Reserve physical eraseblocks */ |
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pebs = reserved_pebs - vol->reserved_pebs; |
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if (pebs > 0) { |
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spin_lock(&ubi->volumes_lock); |
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if (pebs > ubi->avail_pebs) { |
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ubi_err(ubi, "not enough PEBs: requested %d, available %d", |
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pebs, ubi->avail_pebs); |
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if (ubi->corr_peb_count) |
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ubi_err(ubi, "%d PEBs are corrupted and not used", |
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ubi->corr_peb_count); |
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spin_unlock(&ubi->volumes_lock); |
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err = -ENOSPC; |
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goto out_free; |
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} |
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ubi->avail_pebs -= pebs; |
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ubi->rsvd_pebs += pebs; |
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ubi_eba_copy_table(vol, new_eba_tbl, vol->reserved_pebs); |
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ubi_eba_replace_table(vol, new_eba_tbl); |
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spin_unlock(&ubi->volumes_lock); |
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} |
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|
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if (pebs < 0) { |
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for (i = 0; i < -pebs; i++) { |
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err = ubi_eba_unmap_leb(ubi, vol, reserved_pebs + i); |
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if (err) |
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goto out_acc; |
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} |
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spin_lock(&ubi->volumes_lock); |
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ubi->rsvd_pebs += pebs; |
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ubi->avail_pebs -= pebs; |
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ubi_update_reserved(ubi); |
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ubi_eba_copy_table(vol, new_eba_tbl, reserved_pebs); |
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ubi_eba_replace_table(vol, new_eba_tbl); |
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spin_unlock(&ubi->volumes_lock); |
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} |
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|
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/* |
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* When we shrink a volume we have to flush all pending (erase) work. |
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* Otherwise it can happen that upon next attach UBI finds a LEB with |
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* lnum > highest_lnum and refuses to attach. |
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*/ |
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if (pebs < 0) { |
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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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} |
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|
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/* Change volume table record */ |
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vtbl_rec = ubi->vtbl[vol_id]; |
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vtbl_rec.reserved_pebs = cpu_to_be32(reserved_pebs); |
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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_acc; |
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|
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vol->reserved_pebs = reserved_pebs; |
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if (vol->vol_type == UBI_DYNAMIC_VOLUME) { |
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vol->used_ebs = 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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} |
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|
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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_eba_tbl); |
|
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(ubi, "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; |
|
vol->dev.groups = volume_dev_groups; |
|
dev_set_name(&vol->dev, "%s_%d", ubi->ubi_name, vol->vol_id); |
|
err = device_register(&vol->dev); |
|
if (err) |
|
goto out_cdev; |
|
|
|
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); |
|
device_unregister(&vol->dev); |
|
} |
|
|
|
/** |
|
* 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(ubi, "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(ubi, "negative values"); |
|
goto fail; |
|
} |
|
if (vol->alignment > ubi->leb_size || vol->alignment == 0) { |
|
ubi_err(ubi, "bad alignment"); |
|
goto fail; |
|
} |
|
|
|
n = vol->alignment & (ubi->min_io_size - 1); |
|
if (vol->alignment != 1 && n) { |
|
ubi_err(ubi, "alignment is not multiple of min I/O unit"); |
|
goto fail; |
|
} |
|
|
|
n = ubi->leb_size % vol->alignment; |
|
if (vol->data_pad != n) { |
|
ubi_err(ubi, "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(ubi, "bad vol_type"); |
|
goto fail; |
|
} |
|
|
|
if (vol->upd_marker && vol->corrupted) { |
|
ubi_err(ubi, "update marker and corrupted simultaneously"); |
|
goto fail; |
|
} |
|
|
|
if (vol->reserved_pebs > ubi->good_peb_count) { |
|
ubi_err(ubi, "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(ubi, "bad usable_leb_size, has to be %lld", n); |
|
goto fail; |
|
} |
|
|
|
if (vol->name_len > UBI_VOL_NAME_MAX) { |
|
ubi_err(ubi, "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(ubi, "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(ubi, "corrupted dynamic volume"); |
|
goto fail; |
|
} |
|
if (vol->used_ebs != vol->reserved_pebs) { |
|
ubi_err(ubi, "bad used_ebs"); |
|
goto fail; |
|
} |
|
if (vol->last_eb_bytes != vol->usable_leb_size) { |
|
ubi_err(ubi, "bad last_eb_bytes"); |
|
goto fail; |
|
} |
|
if (vol->used_bytes != n) { |
|
ubi_err(ubi, "bad used_bytes"); |
|
goto fail; |
|
} |
|
|
|
if (vol->skip_check) { |
|
ubi_err(ubi, "bad skip_check"); |
|
goto fail; |
|
} |
|
} else { |
|
if (vol->used_ebs < 0 || vol->used_ebs > vol->reserved_pebs) { |
|
ubi_err(ubi, "bad used_ebs"); |
|
goto fail; |
|
} |
|
if (vol->last_eb_bytes < 0 || |
|
vol->last_eb_bytes > vol->usable_leb_size) { |
|
ubi_err(ubi, "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(ubi, "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(ubi, "volume info is different"); |
|
goto fail; |
|
} |
|
|
|
spin_unlock(&ubi->volumes_lock); |
|
return 0; |
|
|
|
fail: |
|
ubi_err(ubi, "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; |
|
}
|
|
|