blob: 4be4014c70df8fd7a9d84a5ab674d7ecc06d6a81 [file] [log] [blame]
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +04001/*
2 * Copyright (c) International Business Machines Corp., 2006
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
12 * the GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 *
18 * Author: Artem Bityutskiy (Битюцкий Артём)
19 */
20
21/*
22 * This file contains implementation of volume creation, deletion, updating and
23 * resizing.
24 */
25
26#include <linux/err.h>
27#include <asm/div64.h>
28#include "ubi.h"
29
30#ifdef CONFIG_MTD_UBI_DEBUG_PARANOID
Artem Bityutskiyc8566352008-07-16 17:40:22 +030031static int paranoid_check_volumes(struct ubi_device *ubi);
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +040032#else
Artem Bityutskiyc8566352008-07-16 17:40:22 +030033#define paranoid_check_volumes(ubi) 0
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +040034#endif
35
36static ssize_t vol_attribute_show(struct device *dev,
37 struct device_attribute *attr, char *buf);
38
39/* Device attributes corresponding to files in '/<sysfs>/class/ubi/ubiX_Y' */
Artem Bityutskiy8bc22962007-07-22 15:25:02 +030040static struct device_attribute attr_vol_reserved_ebs =
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +040041 __ATTR(reserved_ebs, S_IRUGO, vol_attribute_show, NULL);
Artem Bityutskiy8bc22962007-07-22 15:25:02 +030042static struct device_attribute attr_vol_type =
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +040043 __ATTR(type, S_IRUGO, vol_attribute_show, NULL);
Artem Bityutskiy8bc22962007-07-22 15:25:02 +030044static struct device_attribute attr_vol_name =
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +040045 __ATTR(name, S_IRUGO, vol_attribute_show, NULL);
Artem Bityutskiy8bc22962007-07-22 15:25:02 +030046static struct device_attribute attr_vol_corrupted =
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +040047 __ATTR(corrupted, S_IRUGO, vol_attribute_show, NULL);
Artem Bityutskiy8bc22962007-07-22 15:25:02 +030048static struct device_attribute attr_vol_alignment =
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +040049 __ATTR(alignment, S_IRUGO, vol_attribute_show, NULL);
Artem Bityutskiy8bc22962007-07-22 15:25:02 +030050static struct device_attribute attr_vol_usable_eb_size =
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +040051 __ATTR(usable_eb_size, S_IRUGO, vol_attribute_show, NULL);
Artem Bityutskiy8bc22962007-07-22 15:25:02 +030052static struct device_attribute attr_vol_data_bytes =
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +040053 __ATTR(data_bytes, S_IRUGO, vol_attribute_show, NULL);
Artem Bityutskiy8bc22962007-07-22 15:25:02 +030054static struct device_attribute attr_vol_upd_marker =
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +040055 __ATTR(upd_marker, S_IRUGO, vol_attribute_show, NULL);
56
57/*
58 * "Show" method for files in '/<sysfs>/class/ubi/ubiX_Y/'.
59 *
60 * Consider a situation:
61 * A. process 1 opens a sysfs file related to volume Y, say
62 * /<sysfs>/class/ubi/ubiX_Y/reserved_ebs;
63 * B. process 2 removes volume Y;
64 * C. process 1 starts reading the /<sysfs>/class/ubi/ubiX_Y/reserved_ebs file;
65 *
Artem Bityutskiyd05c77a2007-12-17 15:42:57 +020066 * In this situation, this function will return %-ENODEV because it will find
67 * out that the volume was removed from the @ubi->volumes array.
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +040068 */
69static ssize_t vol_attribute_show(struct device *dev,
70 struct device_attribute *attr, char *buf)
71{
Artem Bityutskiyd05c77a2007-12-17 15:42:57 +020072 int ret;
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +040073 struct ubi_volume *vol = container_of(dev, struct ubi_volume, dev);
Artem Bityutskiye73f4452007-12-17 17:37:26 +020074 struct ubi_device *ubi;
75
76 ubi = ubi_get_device(vol->ubi->ubi_num);
77 if (!ubi)
78 return -ENODEV;
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +040079
Artem Bityutskiyd05c77a2007-12-17 15:42:57 +020080 spin_lock(&ubi->volumes_lock);
81 if (!ubi->volumes[vol->vol_id]) {
82 spin_unlock(&ubi->volumes_lock);
Artem Bityutskiye73f4452007-12-17 17:37:26 +020083 ubi_put_device(ubi);
Artem Bityutskiyd05c77a2007-12-17 15:42:57 +020084 return -ENODEV;
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +040085 }
Artem Bityutskiyd05c77a2007-12-17 15:42:57 +020086 /* Take a reference to prevent volume removal */
87 vol->ref_count += 1;
88 spin_unlock(&ubi->volumes_lock);
Artem Bityutskiy732aeac2007-12-15 15:09:07 +020089
Artem Bityutskiy8bc22962007-07-22 15:25:02 +030090 if (attr == &attr_vol_reserved_ebs)
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +040091 ret = sprintf(buf, "%d\n", vol->reserved_pebs);
Artem Bityutskiy8bc22962007-07-22 15:25:02 +030092 else if (attr == &attr_vol_type) {
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +040093 const char *tp;
Artem Bityutskiy8bc22962007-07-22 15:25:02 +030094
95 if (vol->vol_type == UBI_DYNAMIC_VOLUME)
96 tp = "dynamic";
97 else
98 tp = "static";
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +040099 ret = sprintf(buf, "%s\n", tp);
Artem Bityutskiy8bc22962007-07-22 15:25:02 +0300100 } else if (attr == &attr_vol_name)
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400101 ret = sprintf(buf, "%s\n", vol->name);
Artem Bityutskiy8bc22962007-07-22 15:25:02 +0300102 else if (attr == &attr_vol_corrupted)
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400103 ret = sprintf(buf, "%d\n", vol->corrupted);
Artem Bityutskiy8bc22962007-07-22 15:25:02 +0300104 else if (attr == &attr_vol_alignment)
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400105 ret = sprintf(buf, "%d\n", vol->alignment);
Artem Bityutskiy732aeac2007-12-15 15:09:07 +0200106 else if (attr == &attr_vol_usable_eb_size)
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400107 ret = sprintf(buf, "%d\n", vol->usable_leb_size);
Artem Bityutskiy732aeac2007-12-15 15:09:07 +0200108 else if (attr == &attr_vol_data_bytes)
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400109 ret = sprintf(buf, "%lld\n", vol->used_bytes);
Artem Bityutskiy8bc22962007-07-22 15:25:02 +0300110 else if (attr == &attr_vol_upd_marker)
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400111 ret = sprintf(buf, "%d\n", vol->upd_marker);
112 else
Artem Bityutskiyd05c77a2007-12-17 15:42:57 +0200113 /* This must be a bug */
114 ret = -EINVAL;
115
Artem Bityutskiye73f4452007-12-17 17:37:26 +0200116 /* We've done the operation, drop volume and UBI device references */
Artem Bityutskiyd05c77a2007-12-17 15:42:57 +0200117 spin_lock(&ubi->volumes_lock);
118 vol->ref_count -= 1;
119 ubi_assert(vol->ref_count >= 0);
120 spin_unlock(&ubi->volumes_lock);
Artem Bityutskiye73f4452007-12-17 17:37:26 +0200121 ubi_put_device(ubi);
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400122 return ret;
123}
124
125/* Release method for volume devices */
126static void vol_release(struct device *dev)
127{
128 struct ubi_volume *vol = container_of(dev, struct ubi_volume, dev);
Artem Bityutskiy732aeac2007-12-15 15:09:07 +0200129
Artem Bityutskiyabc5e922008-06-04 16:48:12 +0300130 kfree(vol->eba_tbl);
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400131 kfree(vol);
132}
133
134/**
135 * volume_sysfs_init - initialize sysfs for new volume.
136 * @ubi: UBI device description object
137 * @vol: volume description object
138 *
139 * This function returns zero in case of success and a negative error code in
140 * case of failure.
141 *
142 * Note, this function does not free allocated resources in case of failure -
143 * the caller does it. This is because this would cause release() here and the
144 * caller would oops.
145 */
146static int volume_sysfs_init(struct ubi_device *ubi, struct ubi_volume *vol)
147{
148 int err;
149
Artem Bityutskiy8bc22962007-07-22 15:25:02 +0300150 err = device_create_file(&vol->dev, &attr_vol_reserved_ebs);
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400151 if (err)
152 return err;
Artem Bityutskiy8bc22962007-07-22 15:25:02 +0300153 err = device_create_file(&vol->dev, &attr_vol_type);
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400154 if (err)
155 return err;
Artem Bityutskiy8bc22962007-07-22 15:25:02 +0300156 err = device_create_file(&vol->dev, &attr_vol_name);
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400157 if (err)
158 return err;
Artem Bityutskiy8bc22962007-07-22 15:25:02 +0300159 err = device_create_file(&vol->dev, &attr_vol_corrupted);
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400160 if (err)
161 return err;
Artem Bityutskiy8bc22962007-07-22 15:25:02 +0300162 err = device_create_file(&vol->dev, &attr_vol_alignment);
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400163 if (err)
164 return err;
Artem Bityutskiy8bc22962007-07-22 15:25:02 +0300165 err = device_create_file(&vol->dev, &attr_vol_usable_eb_size);
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400166 if (err)
167 return err;
Artem Bityutskiy8bc22962007-07-22 15:25:02 +0300168 err = device_create_file(&vol->dev, &attr_vol_data_bytes);
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400169 if (err)
170 return err;
Artem Bityutskiy8bc22962007-07-22 15:25:02 +0300171 err = device_create_file(&vol->dev, &attr_vol_upd_marker);
Artem Bityutskiyfc75a1e2007-12-17 14:02:09 +0200172 return err;
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400173}
174
175/**
176 * volume_sysfs_close - close sysfs for a volume.
177 * @vol: volume description object
178 */
179static void volume_sysfs_close(struct ubi_volume *vol)
180{
Artem Bityutskiy8bc22962007-07-22 15:25:02 +0300181 device_remove_file(&vol->dev, &attr_vol_upd_marker);
182 device_remove_file(&vol->dev, &attr_vol_data_bytes);
183 device_remove_file(&vol->dev, &attr_vol_usable_eb_size);
184 device_remove_file(&vol->dev, &attr_vol_alignment);
185 device_remove_file(&vol->dev, &attr_vol_corrupted);
186 device_remove_file(&vol->dev, &attr_vol_name);
187 device_remove_file(&vol->dev, &attr_vol_type);
188 device_remove_file(&vol->dev, &attr_vol_reserved_ebs);
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400189 device_unregister(&vol->dev);
190}
191
192/**
193 * ubi_create_volume - create volume.
194 * @ubi: UBI device description object
195 * @req: volume creation request
196 *
197 * This function creates volume described by @req. If @req->vol_id id
Artem Bityutskiyd05c77a2007-12-17 15:42:57 +0200198 * %UBI_VOL_NUM_AUTO, this function automatically assign ID to the new volume
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400199 * and saves it in @req->vol_id. Returns zero in case of success and a negative
Artem Bityutskiy40e4d0c2007-12-17 17:08:55 +0200200 * error code in case of failure. Note, the caller has to have the
201 * @ubi->volumes_mutex locked.
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400202 */
203int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req)
204{
Artem Bityutskiyabc5e922008-06-04 16:48:12 +0300205 int i, err, vol_id = req->vol_id, do_free = 1;
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400206 struct ubi_volume *vol;
207 struct ubi_vtbl_record vtbl_rec;
208 uint64_t bytes;
Artem Bityutskiy49dfc292007-12-15 18:13:56 +0200209 dev_t dev;
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400210
211 if (ubi->ro_mode)
212 return -EROFS;
213
214 vol = kzalloc(sizeof(struct ubi_volume), GFP_KERNEL);
215 if (!vol)
216 return -ENOMEM;
217
218 spin_lock(&ubi->volumes_lock);
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400219 if (vol_id == UBI_VOL_NUM_AUTO) {
220 /* Find unused volume ID */
Artem Bityutskiyc8566352008-07-16 17:40:22 +0300221 dbg_gen("search for vacant volume ID");
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400222 for (i = 0; i < ubi->vtbl_slots; i++)
223 if (!ubi->volumes[i]) {
224 vol_id = i;
225 break;
226 }
227
228 if (vol_id == UBI_VOL_NUM_AUTO) {
229 dbg_err("out of volume IDs");
230 err = -ENFILE;
231 goto out_unlock;
232 }
233 req->vol_id = vol_id;
234 }
235
Artem Bityutskiyc8566352008-07-16 17:40:22 +0300236 dbg_gen("volume ID %d, %llu bytes, type %d, name %s",
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400237 vol_id, (unsigned long long)req->bytes,
238 (int)req->vol_type, req->name);
239
240 /* Ensure that this volume does not exist */
241 err = -EEXIST;
242 if (ubi->volumes[vol_id]) {
243 dbg_err("volume %d already exists", vol_id);
244 goto out_unlock;
245 }
246
247 /* Ensure that the name is unique */
248 for (i = 0; i < ubi->vtbl_slots; i++)
249 if (ubi->volumes[i] &&
250 ubi->volumes[i]->name_len == req->name_len &&
Artem Bityutskiy94784d92007-06-18 12:06:30 +0300251 !strcmp(ubi->volumes[i]->name, req->name)) {
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400252 dbg_err("volume \"%s\" exists (ID %d)", req->name, i);
253 goto out_unlock;
254 }
255
256 /* Calculate how many eraseblocks are requested */
257 vol->usable_leb_size = ubi->leb_size - ubi->leb_size % req->alignment;
258 bytes = req->bytes;
259 if (do_div(bytes, vol->usable_leb_size))
260 vol->reserved_pebs = 1;
261 vol->reserved_pebs += bytes;
262
263 /* Reserve physical eraseblocks */
264 if (vol->reserved_pebs > ubi->avail_pebs) {
265 dbg_err("not enough PEBs, only %d available", ubi->avail_pebs);
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400266 err = -ENOSPC;
267 goto out_unlock;
268 }
269 ubi->avail_pebs -= vol->reserved_pebs;
270 ubi->rsvd_pebs += vol->reserved_pebs;
Artem Bityutskiye73f4452007-12-17 17:37:26 +0200271 spin_unlock(&ubi->volumes_lock);
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400272
273 vol->vol_id = vol_id;
274 vol->alignment = req->alignment;
275 vol->data_pad = ubi->leb_size % vol->alignment;
276 vol->vol_type = req->vol_type;
277 vol->name_len = req->name_len;
Artem Bityutskiya6ea4402008-07-13 21:46:24 +0300278 memcpy(vol->name, req->name, vol->name_len);
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400279 vol->ubi = ubi;
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400280
281 /*
282 * Finish all pending erases because there may be some LEBs belonging
283 * to the same volume ID.
284 */
285 err = ubi_wl_flush(ubi);
286 if (err)
287 goto out_acc;
288
289 vol->eba_tbl = kmalloc(vol->reserved_pebs * sizeof(int), GFP_KERNEL);
290 if (!vol->eba_tbl) {
291 err = -ENOMEM;
292 goto out_acc;
293 }
294
295 for (i = 0; i < vol->reserved_pebs; i++)
296 vol->eba_tbl[i] = UBI_LEB_UNMAPPED;
297
298 if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
299 vol->used_ebs = vol->reserved_pebs;
300 vol->last_eb_bytes = vol->usable_leb_size;
Vinit Agnihotrid08c3b72007-07-10 13:04:59 +0300301 vol->used_bytes =
302 (long long)vol->used_ebs * vol->usable_leb_size;
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400303 } else {
304 bytes = vol->used_bytes;
305 vol->last_eb_bytes = do_div(bytes, vol->usable_leb_size);
306 vol->used_ebs = bytes;
307 if (vol->last_eb_bytes)
308 vol->used_ebs += 1;
309 else
310 vol->last_eb_bytes = vol->usable_leb_size;
311 }
312
313 /* Register character device for the volume */
314 cdev_init(&vol->cdev, &ubi_vol_cdev_operations);
315 vol->cdev.owner = THIS_MODULE;
Artem Bityutskiy49dfc292007-12-15 18:13:56 +0200316 dev = MKDEV(MAJOR(ubi->cdev.dev), vol_id + 1);
317 err = cdev_add(&vol->cdev, dev, 1);
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400318 if (err) {
Artem Bityutskiy01f7b302007-12-15 19:56:51 +0200319 ubi_err("cannot add character device");
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400320 goto out_mapping;
321 }
322
323 err = ubi_create_gluebi(ubi, vol);
324 if (err)
325 goto out_cdev;
326
327 vol->dev.release = vol_release;
328 vol->dev.parent = &ubi->dev;
Artem Bityutskiy49dfc292007-12-15 18:13:56 +0200329 vol->dev.devt = dev;
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400330 vol->dev.class = ubi_class;
Artem Bityutskiyfc75a1e2007-12-17 14:02:09 +0200331
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400332 sprintf(&vol->dev.bus_id[0], "%s_%d", ubi->ubi_name, vol->vol_id);
333 err = device_register(&vol->dev);
Artem Bityutskiy01f7b302007-12-15 19:56:51 +0200334 if (err) {
335 ubi_err("cannot register device");
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400336 goto out_gluebi;
Artem Bityutskiy01f7b302007-12-15 19:56:51 +0200337 }
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400338
339 err = volume_sysfs_init(ubi, vol);
340 if (err)
341 goto out_sysfs;
342
343 /* Fill volume table record */
344 memset(&vtbl_rec, 0, sizeof(struct ubi_vtbl_record));
Christoph Hellwig3261ebd2007-05-21 17:41:46 +0300345 vtbl_rec.reserved_pebs = cpu_to_be32(vol->reserved_pebs);
346 vtbl_rec.alignment = cpu_to_be32(vol->alignment);
347 vtbl_rec.data_pad = cpu_to_be32(vol->data_pad);
348 vtbl_rec.name_len = cpu_to_be16(vol->name_len);
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400349 if (vol->vol_type == UBI_DYNAMIC_VOLUME)
350 vtbl_rec.vol_type = UBI_VID_DYNAMIC;
351 else
352 vtbl_rec.vol_type = UBI_VID_STATIC;
Artem Bityutskiya6ea4402008-07-13 21:46:24 +0300353 memcpy(vtbl_rec.name, vol->name, vol->name_len);
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400354
355 err = ubi_change_vtbl_record(ubi, vol_id, &vtbl_rec);
356 if (err)
357 goto out_sysfs;
358
359 spin_lock(&ubi->volumes_lock);
Artem Bityutskiyd05c77a2007-12-17 15:42:57 +0200360 ubi->volumes[vol_id] = vol;
Artem Bityutskiy4b3cc342007-12-26 15:59:39 +0200361 ubi->vol_count += 1;
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400362 spin_unlock(&ubi->volumes_lock);
363
Artem Bityutskiyc8566352008-07-16 17:40:22 +0300364 err = paranoid_check_volumes(ubi);
365 return err;
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400366
Artem Bityutskiyfc75a1e2007-12-17 14:02:09 +0200367out_sysfs:
368 /*
Artem Bityutskiyabc5e922008-06-04 16:48:12 +0300369 * We have registered our device, we should not free the volume
Artem Bityutskiyfc75a1e2007-12-17 14:02:09 +0200370 * description object in this function in case of an error - it is
371 * freed by the release function.
372 *
373 * Get device reference to prevent the release function from being
374 * called just after sysfs has been closed.
375 */
Artem Bityutskiyabc5e922008-06-04 16:48:12 +0300376 do_free = 0;
Artem Bityutskiyfc75a1e2007-12-17 14:02:09 +0200377 get_device(&vol->dev);
378 volume_sysfs_close(vol);
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400379out_gluebi:
S.Çağlar Onurfc398762008-02-12 13:25:06 +0200380 if (ubi_destroy_gluebi(vol))
381 dbg_err("cannot destroy gluebi for volume %d:%d",
382 ubi->ubi_num, vol_id);
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400383out_cdev:
384 cdev_del(&vol->cdev);
385out_mapping:
Artem Bityutskiyabc5e922008-06-04 16:48:12 +0300386 if (do_free)
387 kfree(vol->eba_tbl);
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400388out_acc:
389 spin_lock(&ubi->volumes_lock);
390 ubi->rsvd_pebs -= vol->reserved_pebs;
391 ubi->avail_pebs += vol->reserved_pebs;
392out_unlock:
393 spin_unlock(&ubi->volumes_lock);
Artem Bityutskiyabc5e922008-06-04 16:48:12 +0300394 if (do_free)
Artem Bityutskiyfc75a1e2007-12-17 14:02:09 +0200395 kfree(vol);
Artem Bityutskiyabc5e922008-06-04 16:48:12 +0300396 else
397 put_device(&vol->dev);
Artem Bityutskiy01f7b302007-12-15 19:56:51 +0200398 ubi_err("cannot create volume %d, error %d", vol_id, err);
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400399 return err;
400}
401
402/**
403 * ubi_remove_volume - remove volume.
404 * @desc: volume descriptor
Artem Bityutskiyf40ac9c2008-07-13 21:47:47 +0300405 * @no_vtbl: do not change volume table if not zero
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400406 *
407 * This function removes volume described by @desc. The volume has to be opened
408 * in "exclusive" mode. Returns zero in case of success and a negative error
Artem Bityutskiy40e4d0c2007-12-17 17:08:55 +0200409 * code in case of failure. The caller has to have the @ubi->volumes_mutex
410 * locked.
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400411 */
Artem Bityutskiyf40ac9c2008-07-13 21:47:47 +0300412int ubi_remove_volume(struct ubi_volume_desc *desc, int no_vtbl)
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400413{
414 struct ubi_volume *vol = desc->vol;
415 struct ubi_device *ubi = vol->ubi;
416 int i, err, vol_id = vol->vol_id, reserved_pebs = vol->reserved_pebs;
417
Artem Bityutskiyc8566352008-07-16 17:40:22 +0300418 dbg_gen("remove UBI volume %d", vol_id);
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400419 ubi_assert(desc->mode == UBI_EXCLUSIVE);
420 ubi_assert(vol == ubi->volumes[vol_id]);
421
422 if (ubi->ro_mode)
423 return -EROFS;
424
Artem Bityutskiyd05c77a2007-12-17 15:42:57 +0200425 spin_lock(&ubi->volumes_lock);
426 if (vol->ref_count > 1) {
427 /*
428 * The volume is busy, probably someone is reading one of its
429 * sysfs files.
430 */
431 err = -EBUSY;
432 goto out_unlock;
433 }
434 ubi->volumes[vol_id] = NULL;
435 spin_unlock(&ubi->volumes_lock);
436
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400437 err = ubi_destroy_gluebi(vol);
438 if (err)
Artem Bityutskiyd05c77a2007-12-17 15:42:57 +0200439 goto out_err;
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400440
Artem Bityutskiyf40ac9c2008-07-13 21:47:47 +0300441 if (!no_vtbl) {
442 err = ubi_change_vtbl_record(ubi, vol_id, NULL);
443 if (err)
444 goto out_err;
445 }
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400446
447 for (i = 0; i < vol->reserved_pebs; i++) {
Artem Bityutskiy89b96b62007-12-16 20:00:38 +0200448 err = ubi_eba_unmap_leb(ubi, vol, i);
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400449 if (err)
Artem Bityutskiyd05c77a2007-12-17 15:42:57 +0200450 goto out_err;
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400451 }
452
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400453 cdev_del(&vol->cdev);
454 volume_sysfs_close(vol);
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400455
456 spin_lock(&ubi->volumes_lock);
457 ubi->rsvd_pebs -= reserved_pebs;
458 ubi->avail_pebs += reserved_pebs;
459 i = ubi->beb_rsvd_level - ubi->beb_rsvd_pebs;
460 if (i > 0) {
461 i = ubi->avail_pebs >= i ? i : ubi->avail_pebs;
462 ubi->avail_pebs -= i;
463 ubi->rsvd_pebs += i;
464 ubi->beb_rsvd_pebs += i;
465 if (i > 0)
466 ubi_msg("reserve more %d PEBs", i);
467 }
468 ubi->vol_count -= 1;
469 spin_unlock(&ubi->volumes_lock);
470
Artem Bityutskiyf40ac9c2008-07-13 21:47:47 +0300471 if (!no_vtbl)
472 err = paranoid_check_volumes(ubi);
Artem Bityutskiyc8566352008-07-16 17:40:22 +0300473 return err;
Artem Bityutskiyd05c77a2007-12-17 15:42:57 +0200474
475out_err:
476 ubi_err("cannot remove volume %d, error %d", vol_id, err);
477 spin_lock(&ubi->volumes_lock);
478 ubi->volumes[vol_id] = vol;
479out_unlock:
480 spin_unlock(&ubi->volumes_lock);
Artem Bityutskiycae0a772007-12-17 12:46:48 +0200481 return err;
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400482}
483
484/**
485 * ubi_resize_volume - re-size volume.
486 * @desc: volume descriptor
487 * @reserved_pebs: new size in physical eraseblocks
488 *
Artem Bityutskiy40e4d0c2007-12-17 17:08:55 +0200489 * This function re-sizes the volume and returns zero in case of success, and a
490 * negative error code in case of failure. The caller has to have the
491 * @ubi->volumes_mutex locked.
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400492 */
493int ubi_resize_volume(struct ubi_volume_desc *desc, int reserved_pebs)
494{
495 int i, err, pebs, *new_mapping;
496 struct ubi_volume *vol = desc->vol;
497 struct ubi_device *ubi = vol->ubi;
498 struct ubi_vtbl_record vtbl_rec;
499 int vol_id = vol->vol_id;
500
501 if (ubi->ro_mode)
502 return -EROFS;
503
Artem Bityutskiyc8566352008-07-16 17:40:22 +0300504 dbg_gen("re-size volume %d to from %d to %d PEBs",
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400505 vol_id, vol->reserved_pebs, reserved_pebs);
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400506
507 if (vol->vol_type == UBI_STATIC_VOLUME &&
508 reserved_pebs < vol->used_ebs) {
509 dbg_err("too small size %d, %d LEBs contain data",
510 reserved_pebs, vol->used_ebs);
511 return -EINVAL;
512 }
513
514 /* If the size is the same, we have nothing to do */
515 if (reserved_pebs == vol->reserved_pebs)
516 return 0;
517
518 new_mapping = kmalloc(reserved_pebs * sizeof(int), GFP_KERNEL);
519 if (!new_mapping)
520 return -ENOMEM;
521
522 for (i = 0; i < reserved_pebs; i++)
523 new_mapping[i] = UBI_LEB_UNMAPPED;
524
Artem Bityutskiyd05c77a2007-12-17 15:42:57 +0200525 spin_lock(&ubi->volumes_lock);
526 if (vol->ref_count > 1) {
527 spin_unlock(&ubi->volumes_lock);
528 err = -EBUSY;
529 goto out_free;
530 }
531 spin_unlock(&ubi->volumes_lock);
532
Artem Bityutskiyd05c77a2007-12-17 15:42:57 +0200533 /* Reserve physical eraseblocks */
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400534 pebs = reserved_pebs - vol->reserved_pebs;
535 if (pebs > 0) {
536 spin_lock(&ubi->volumes_lock);
537 if (pebs > ubi->avail_pebs) {
538 dbg_err("not enough PEBs: requested %d, available %d",
539 pebs, ubi->avail_pebs);
540 spin_unlock(&ubi->volumes_lock);
541 err = -ENOSPC;
542 goto out_free;
543 }
544 ubi->avail_pebs -= pebs;
545 ubi->rsvd_pebs += pebs;
546 for (i = 0; i < vol->reserved_pebs; i++)
547 new_mapping[i] = vol->eba_tbl[i];
548 kfree(vol->eba_tbl);
549 vol->eba_tbl = new_mapping;
550 spin_unlock(&ubi->volumes_lock);
551 }
552
553 /* Change volume table record */
554 memcpy(&vtbl_rec, &ubi->vtbl[vol_id], sizeof(struct ubi_vtbl_record));
Christoph Hellwig3261ebd2007-05-21 17:41:46 +0300555 vtbl_rec.reserved_pebs = cpu_to_be32(reserved_pebs);
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400556 err = ubi_change_vtbl_record(ubi, vol_id, &vtbl_rec);
557 if (err)
558 goto out_acc;
559
560 if (pebs < 0) {
561 for (i = 0; i < -pebs; i++) {
Artem Bityutskiy89b96b62007-12-16 20:00:38 +0200562 err = ubi_eba_unmap_leb(ubi, vol, reserved_pebs + i);
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400563 if (err)
564 goto out_acc;
565 }
566 spin_lock(&ubi->volumes_lock);
567 ubi->rsvd_pebs += pebs;
568 ubi->avail_pebs -= pebs;
569 pebs = ubi->beb_rsvd_level - ubi->beb_rsvd_pebs;
570 if (pebs > 0) {
571 pebs = ubi->avail_pebs >= pebs ? pebs : ubi->avail_pebs;
572 ubi->avail_pebs -= pebs;
573 ubi->rsvd_pebs += pebs;
574 ubi->beb_rsvd_pebs += pebs;
575 if (pebs > 0)
576 ubi_msg("reserve more %d PEBs", pebs);
577 }
578 for (i = 0; i < reserved_pebs; i++)
579 new_mapping[i] = vol->eba_tbl[i];
580 kfree(vol->eba_tbl);
581 vol->eba_tbl = new_mapping;
582 spin_unlock(&ubi->volumes_lock);
583 }
584
585 vol->reserved_pebs = reserved_pebs;
586 if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
587 vol->used_ebs = reserved_pebs;
588 vol->last_eb_bytes = vol->usable_leb_size;
Vinit Agnihotrid08c3b72007-07-10 13:04:59 +0300589 vol->used_bytes =
590 (long long)vol->used_ebs * vol->usable_leb_size;
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400591 }
592
Artem Bityutskiyc8566352008-07-16 17:40:22 +0300593 err = paranoid_check_volumes(ubi);
594 return err;
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400595
596out_acc:
597 if (pebs > 0) {
598 spin_lock(&ubi->volumes_lock);
599 ubi->rsvd_pebs -= pebs;
600 ubi->avail_pebs += pebs;
601 spin_unlock(&ubi->volumes_lock);
602 }
603out_free:
604 kfree(new_mapping);
605 return err;
606}
607
608/**
Artem Bityutskiyf40ac9c2008-07-13 21:47:47 +0300609 * ubi_rename_volumes - re-name UBI volumes.
610 * @ubi: UBI device description object
611 * @renam_list: list of &struct ubi_rename_entry objects
612 *
613 * This function re-names or removes volumes specified in the re-name list.
614 * Returns zero in case of success and a negative error code in case of
615 * failure.
616 */
617int ubi_rename_volumes(struct ubi_device *ubi, struct list_head *rename_list)
618{
619 int err;
620 struct ubi_rename_entry *re;
621
622 err = ubi_vtbl_rename_volumes(ubi, rename_list);
623 if (err)
624 return err;
625
626 list_for_each_entry(re, rename_list, list) {
627 if (re->remove) {
628 err = ubi_remove_volume(re->desc, 1);
629 if (err)
630 break;
631 } else {
632 struct ubi_volume *vol = re->desc->vol;
633
634 spin_lock(&ubi->volumes_lock);
635 vol->name_len = re->new_name_len;
636 memcpy(vol->name, re->new_name, re->new_name_len + 1);
637 spin_unlock(&ubi->volumes_lock);
638 }
639 }
640
641 if (!err)
642 paranoid_check_volumes(ubi);
643 return err;
644}
645
646/**
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400647 * ubi_add_volume - add volume.
648 * @ubi: UBI device description object
Artem Bityutskiy89b96b62007-12-16 20:00:38 +0200649 * @vol: volume description object
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400650 *
Artem Bityutskiyd05c77a2007-12-17 15:42:57 +0200651 * This function adds an existing volume and initializes all its data
652 * structures. Returns zero in case of success and a negative error code in
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400653 * case of failure.
654 */
Artem Bityutskiy89b96b62007-12-16 20:00:38 +0200655int ubi_add_volume(struct ubi_device *ubi, struct ubi_volume *vol)
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400656{
Artem Bityutskiy89b96b62007-12-16 20:00:38 +0200657 int err, vol_id = vol->vol_id;
Artem Bityutskiy49dfc292007-12-15 18:13:56 +0200658 dev_t dev;
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400659
Artem Bityutskiyc8566352008-07-16 17:40:22 +0300660 dbg_gen("add volume %d", vol_id);
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400661
662 /* Register character device for the volume */
663 cdev_init(&vol->cdev, &ubi_vol_cdev_operations);
664 vol->cdev.owner = THIS_MODULE;
Artem Bityutskiy49dfc292007-12-15 18:13:56 +0200665 dev = MKDEV(MAJOR(ubi->cdev.dev), vol->vol_id + 1);
666 err = cdev_add(&vol->cdev, dev, 1);
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400667 if (err) {
Artem Bityutskiy01f7b302007-12-15 19:56:51 +0200668 ubi_err("cannot add character device for volume %d, error %d",
669 vol_id, err);
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400670 return err;
671 }
672
673 err = ubi_create_gluebi(ubi, vol);
674 if (err)
675 goto out_cdev;
676
677 vol->dev.release = vol_release;
678 vol->dev.parent = &ubi->dev;
Artem Bityutskiy49dfc292007-12-15 18:13:56 +0200679 vol->dev.devt = dev;
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400680 vol->dev.class = ubi_class;
681 sprintf(&vol->dev.bus_id[0], "%s_%d", ubi->ubi_name, vol->vol_id);
682 err = device_register(&vol->dev);
683 if (err)
684 goto out_gluebi;
685
686 err = volume_sysfs_init(ubi, vol);
687 if (err) {
688 cdev_del(&vol->cdev);
689 err = ubi_destroy_gluebi(vol);
690 volume_sysfs_close(vol);
691 return err;
692 }
693
Artem Bityutskiyc8566352008-07-16 17:40:22 +0300694 err = paranoid_check_volumes(ubi);
695 return err;
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400696
697out_gluebi:
698 err = ubi_destroy_gluebi(vol);
699out_cdev:
700 cdev_del(&vol->cdev);
701 return err;
702}
703
704/**
705 * ubi_free_volume - free volume.
706 * @ubi: UBI device description object
Artem Bityutskiy89b96b62007-12-16 20:00:38 +0200707 * @vol: volume description object
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400708 *
Artem Bityutskiy89b96b62007-12-16 20:00:38 +0200709 * This function frees all resources for volume @vol but does not remove it.
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400710 * Used only when the UBI device is detached.
711 */
Artem Bityutskiy89b96b62007-12-16 20:00:38 +0200712void ubi_free_volume(struct ubi_device *ubi, struct ubi_volume *vol)
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400713{
714 int err;
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400715
Artem Bityutskiyc8566352008-07-16 17:40:22 +0300716 dbg_gen("free volume %d", vol->vol_id);
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400717
Artem Bityutskiy89b96b62007-12-16 20:00:38 +0200718 ubi->volumes[vol->vol_id] = NULL;
Artem Bityutskiyd05c77a2007-12-17 15:42:57 +0200719 err = ubi_destroy_gluebi(vol);
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400720 cdev_del(&vol->cdev);
721 volume_sysfs_close(vol);
722}
723
724#ifdef CONFIG_MTD_UBI_DEBUG_PARANOID
725
726/**
727 * paranoid_check_volume - check volume information.
728 * @ubi: UBI device description object
729 * @vol_id: volume ID
Artem Bityutskiyc8566352008-07-16 17:40:22 +0300730 *
731 * Returns zero if volume is all right and a a negative error code if not.
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400732 */
Artem Bityutskiyc8566352008-07-16 17:40:22 +0300733static int paranoid_check_volume(struct ubi_device *ubi, int vol_id)
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400734{
735 int idx = vol_id2idx(ubi, vol_id);
736 int reserved_pebs, alignment, data_pad, vol_type, name_len, upd_marker;
Artem Bityutskiyb89044b2007-06-18 16:29:30 +0300737 const struct ubi_volume *vol;
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400738 long long n;
739 const char *name;
740
Artem Bityutskiyb89044b2007-06-18 16:29:30 +0300741 spin_lock(&ubi->volumes_lock);
Christoph Hellwig3261ebd2007-05-21 17:41:46 +0300742 reserved_pebs = be32_to_cpu(ubi->vtbl[vol_id].reserved_pebs);
Artem Bityutskiyb89044b2007-06-18 16:29:30 +0300743 vol = ubi->volumes[idx];
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400744
745 if (!vol) {
746 if (reserved_pebs) {
747 ubi_err("no volume info, but volume exists");
748 goto fail;
749 }
Artem Bityutskiyb89044b2007-06-18 16:29:30 +0300750 spin_unlock(&ubi->volumes_lock);
Artem Bityutskiyc8566352008-07-16 17:40:22 +0300751 return 0;
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400752 }
753
754 if (vol->reserved_pebs < 0 || vol->alignment < 0 || vol->data_pad < 0 ||
755 vol->name_len < 0) {
756 ubi_err("negative values");
757 goto fail;
758 }
759 if (vol->alignment > ubi->leb_size || vol->alignment == 0) {
760 ubi_err("bad alignment");
761 goto fail;
762 }
763
Kyungmin Parkcadb40c2008-05-22 10:32:18 +0900764 n = vol->alignment & (ubi->min_io_size - 1);
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400765 if (vol->alignment != 1 && n) {
766 ubi_err("alignment is not multiple of min I/O unit");
767 goto fail;
768 }
769
770 n = ubi->leb_size % vol->alignment;
771 if (vol->data_pad != n) {
772 ubi_err("bad data_pad, has to be %lld", n);
773 goto fail;
774 }
775
776 if (vol->vol_type != UBI_DYNAMIC_VOLUME &&
777 vol->vol_type != UBI_STATIC_VOLUME) {
778 ubi_err("bad vol_type");
779 goto fail;
780 }
781
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400782 if (vol->upd_marker && vol->corrupted) {
783 dbg_err("update marker and corrupted simultaneously");
784 goto fail;
785 }
786
787 if (vol->reserved_pebs > ubi->good_peb_count) {
788 ubi_err("too large reserved_pebs");
789 goto fail;
790 }
791
792 n = ubi->leb_size - vol->data_pad;
793 if (vol->usable_leb_size != ubi->leb_size - vol->data_pad) {
794 ubi_err("bad usable_leb_size, has to be %lld", n);
795 goto fail;
796 }
797
798 if (vol->name_len > UBI_VOL_NAME_MAX) {
799 ubi_err("too long volume name, max is %d", UBI_VOL_NAME_MAX);
800 goto fail;
801 }
802
803 if (!vol->name) {
804 ubi_err("NULL volume name");
805 goto fail;
806 }
807
808 n = strnlen(vol->name, vol->name_len + 1);
809 if (n != vol->name_len) {
810 ubi_err("bad name_len %lld", n);
811 goto fail;
812 }
813
Vinit Agnihotrid08c3b72007-07-10 13:04:59 +0300814 n = (long long)vol->used_ebs * vol->usable_leb_size;
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400815 if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
Artem Bityutskiy896c0c02008-01-16 14:24:14 +0200816 if (vol->corrupted) {
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400817 ubi_err("corrupted dynamic volume");
818 goto fail;
819 }
820 if (vol->used_ebs != vol->reserved_pebs) {
821 ubi_err("bad used_ebs");
822 goto fail;
823 }
824 if (vol->last_eb_bytes != vol->usable_leb_size) {
825 ubi_err("bad last_eb_bytes");
826 goto fail;
827 }
828 if (vol->used_bytes != n) {
829 ubi_err("bad used_bytes");
830 goto fail;
831 }
832 } else {
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400833 if (vol->used_ebs < 0 || vol->used_ebs > vol->reserved_pebs) {
834 ubi_err("bad used_ebs");
835 goto fail;
836 }
837 if (vol->last_eb_bytes < 0 ||
838 vol->last_eb_bytes > vol->usable_leb_size) {
839 ubi_err("bad last_eb_bytes");
840 goto fail;
841 }
842 if (vol->used_bytes < 0 || vol->used_bytes > n ||
843 vol->used_bytes < n - vol->usable_leb_size) {
844 ubi_err("bad used_bytes");
845 goto fail;
846 }
847 }
848
Christoph Hellwig3261ebd2007-05-21 17:41:46 +0300849 alignment = be32_to_cpu(ubi->vtbl[vol_id].alignment);
850 data_pad = be32_to_cpu(ubi->vtbl[vol_id].data_pad);
851 name_len = be16_to_cpu(ubi->vtbl[vol_id].name_len);
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400852 upd_marker = ubi->vtbl[vol_id].upd_marker;
853 name = &ubi->vtbl[vol_id].name[0];
854 if (ubi->vtbl[vol_id].vol_type == UBI_VID_DYNAMIC)
855 vol_type = UBI_DYNAMIC_VOLUME;
856 else
857 vol_type = UBI_STATIC_VOLUME;
858
859 if (alignment != vol->alignment || data_pad != vol->data_pad ||
860 upd_marker != vol->upd_marker || vol_type != vol->vol_type ||
861 name_len!= vol->name_len || strncmp(name, vol->name, name_len)) {
862 ubi_err("volume info is different");
863 goto fail;
864 }
865
Artem Bityutskiyb89044b2007-06-18 16:29:30 +0300866 spin_unlock(&ubi->volumes_lock);
Artem Bityutskiyc8566352008-07-16 17:40:22 +0300867 return 0;
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400868
869fail:
Artem Bityutskiy94784d92007-06-18 12:06:30 +0300870 ubi_err("paranoid check failed for volume %d", vol_id);
Artem Bityutskiyf40ac9c2008-07-13 21:47:47 +0300871 if (vol)
Artem Bityutskiyc8566352008-07-16 17:40:22 +0300872 ubi_dbg_dump_vol_info(vol);
Artem Bityutskiyf40ac9c2008-07-13 21:47:47 +0300873 ubi_dbg_dump_vtbl_record(&ubi->vtbl[vol_id], vol_id);
Artem Bityutskiyb89044b2007-06-18 16:29:30 +0300874 spin_unlock(&ubi->volumes_lock);
Artem Bityutskiyc8566352008-07-16 17:40:22 +0300875 return -EINVAL;
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400876}
877
878/**
879 * paranoid_check_volumes - check information about all volumes.
880 * @ubi: UBI device description object
Artem Bityutskiyc8566352008-07-16 17:40:22 +0300881 *
882 * Returns zero if volumes are all right and a a negative error code if not.
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400883 */
Artem Bityutskiyc8566352008-07-16 17:40:22 +0300884static int paranoid_check_volumes(struct ubi_device *ubi)
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400885{
Artem Bityutskiyc8566352008-07-16 17:40:22 +0300886 int i, err = 0;
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400887
Artem Bityutskiyc8566352008-07-16 17:40:22 +0300888 for (i = 0; i < ubi->vtbl_slots; i++) {
889 err = paranoid_check_volume(ubi, i);
890 if (err)
891 break;
892 }
893
894 return err;
Artem B. Bityutskiy801c1352006-06-27 12:22:22 +0400895}
896#endif