Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1 | /* |
| 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> |
Artem Bityutskiy | 3013ee3 | 2009-01-16 19:08:43 +0200 | [diff] [blame] | 27 | #include <linux/math64.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 28 | #include <linux/slab.h> |
Paul Gortmaker | f3bcc01 | 2011-07-10 12:43:28 -0400 | [diff] [blame] | 29 | #include <linux/export.h> |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 30 | #include "ubi.h" |
| 31 | |
Artem Bityutskiy | 7bf523a | 2012-05-16 18:29:54 +0300 | [diff] [blame] | 32 | static int self_check_volumes(struct ubi_device *ubi); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 33 | |
| 34 | static ssize_t vol_attribute_show(struct device *dev, |
| 35 | struct device_attribute *attr, char *buf); |
| 36 | |
| 37 | /* Device attributes corresponding to files in '/<sysfs>/class/ubi/ubiX_Y' */ |
Artem Bityutskiy | 8bc2296 | 2007-07-22 15:25:02 +0300 | [diff] [blame] | 38 | static struct device_attribute attr_vol_reserved_ebs = |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 39 | __ATTR(reserved_ebs, S_IRUGO, vol_attribute_show, NULL); |
Artem Bityutskiy | 8bc2296 | 2007-07-22 15:25:02 +0300 | [diff] [blame] | 40 | static struct device_attribute attr_vol_type = |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 41 | __ATTR(type, S_IRUGO, vol_attribute_show, NULL); |
Artem Bityutskiy | 8bc2296 | 2007-07-22 15:25:02 +0300 | [diff] [blame] | 42 | static struct device_attribute attr_vol_name = |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 43 | __ATTR(name, S_IRUGO, vol_attribute_show, NULL); |
Artem Bityutskiy | 8bc2296 | 2007-07-22 15:25:02 +0300 | [diff] [blame] | 44 | static struct device_attribute attr_vol_corrupted = |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 45 | __ATTR(corrupted, S_IRUGO, vol_attribute_show, NULL); |
Artem Bityutskiy | 8bc2296 | 2007-07-22 15:25:02 +0300 | [diff] [blame] | 46 | static struct device_attribute attr_vol_alignment = |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 47 | __ATTR(alignment, S_IRUGO, vol_attribute_show, NULL); |
Artem Bityutskiy | 8bc2296 | 2007-07-22 15:25:02 +0300 | [diff] [blame] | 48 | static struct device_attribute attr_vol_usable_eb_size = |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 49 | __ATTR(usable_eb_size, S_IRUGO, vol_attribute_show, NULL); |
Artem Bityutskiy | 8bc2296 | 2007-07-22 15:25:02 +0300 | [diff] [blame] | 50 | static struct device_attribute attr_vol_data_bytes = |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 51 | __ATTR(data_bytes, S_IRUGO, vol_attribute_show, NULL); |
Artem Bityutskiy | 8bc2296 | 2007-07-22 15:25:02 +0300 | [diff] [blame] | 52 | static struct device_attribute attr_vol_upd_marker = |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 53 | __ATTR(upd_marker, S_IRUGO, vol_attribute_show, NULL); |
| 54 | |
| 55 | /* |
| 56 | * "Show" method for files in '/<sysfs>/class/ubi/ubiX_Y/'. |
| 57 | * |
| 58 | * Consider a situation: |
| 59 | * A. process 1 opens a sysfs file related to volume Y, say |
| 60 | * /<sysfs>/class/ubi/ubiX_Y/reserved_ebs; |
| 61 | * B. process 2 removes volume Y; |
| 62 | * C. process 1 starts reading the /<sysfs>/class/ubi/ubiX_Y/reserved_ebs file; |
| 63 | * |
Artem Bityutskiy | d05c77a | 2007-12-17 15:42:57 +0200 | [diff] [blame] | 64 | * In this situation, this function will return %-ENODEV because it will find |
| 65 | * out that the volume was removed from the @ubi->volumes array. |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 66 | */ |
| 67 | static ssize_t vol_attribute_show(struct device *dev, |
| 68 | struct device_attribute *attr, char *buf) |
| 69 | { |
Artem Bityutskiy | d05c77a | 2007-12-17 15:42:57 +0200 | [diff] [blame] | 70 | int ret; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 71 | struct ubi_volume *vol = container_of(dev, struct ubi_volume, dev); |
Artem Bityutskiy | e73f445 | 2007-12-17 17:37:26 +0200 | [diff] [blame] | 72 | struct ubi_device *ubi; |
| 73 | |
| 74 | ubi = ubi_get_device(vol->ubi->ubi_num); |
| 75 | if (!ubi) |
| 76 | return -ENODEV; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 77 | |
Artem Bityutskiy | d05c77a | 2007-12-17 15:42:57 +0200 | [diff] [blame] | 78 | spin_lock(&ubi->volumes_lock); |
| 79 | if (!ubi->volumes[vol->vol_id]) { |
| 80 | spin_unlock(&ubi->volumes_lock); |
Artem Bityutskiy | e73f445 | 2007-12-17 17:37:26 +0200 | [diff] [blame] | 81 | ubi_put_device(ubi); |
Artem Bityutskiy | d05c77a | 2007-12-17 15:42:57 +0200 | [diff] [blame] | 82 | return -ENODEV; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 83 | } |
Artem Bityutskiy | d05c77a | 2007-12-17 15:42:57 +0200 | [diff] [blame] | 84 | /* Take a reference to prevent volume removal */ |
| 85 | vol->ref_count += 1; |
| 86 | spin_unlock(&ubi->volumes_lock); |
Artem Bityutskiy | 732aeac | 2007-12-15 15:09:07 +0200 | [diff] [blame] | 87 | |
Artem Bityutskiy | 8bc2296 | 2007-07-22 15:25:02 +0300 | [diff] [blame] | 88 | if (attr == &attr_vol_reserved_ebs) |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 89 | ret = sprintf(buf, "%d\n", vol->reserved_pebs); |
Artem Bityutskiy | 8bc2296 | 2007-07-22 15:25:02 +0300 | [diff] [blame] | 90 | else if (attr == &attr_vol_type) { |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 91 | const char *tp; |
Artem Bityutskiy | 8bc2296 | 2007-07-22 15:25:02 +0300 | [diff] [blame] | 92 | |
| 93 | if (vol->vol_type == UBI_DYNAMIC_VOLUME) |
| 94 | tp = "dynamic"; |
| 95 | else |
| 96 | tp = "static"; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 97 | ret = sprintf(buf, "%s\n", tp); |
Artem Bityutskiy | 8bc2296 | 2007-07-22 15:25:02 +0300 | [diff] [blame] | 98 | } else if (attr == &attr_vol_name) |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 99 | ret = sprintf(buf, "%s\n", vol->name); |
Artem Bityutskiy | 8bc2296 | 2007-07-22 15:25:02 +0300 | [diff] [blame] | 100 | else if (attr == &attr_vol_corrupted) |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 101 | ret = sprintf(buf, "%d\n", vol->corrupted); |
Artem Bityutskiy | 8bc2296 | 2007-07-22 15:25:02 +0300 | [diff] [blame] | 102 | else if (attr == &attr_vol_alignment) |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 103 | ret = sprintf(buf, "%d\n", vol->alignment); |
Artem Bityutskiy | 732aeac | 2007-12-15 15:09:07 +0200 | [diff] [blame] | 104 | else if (attr == &attr_vol_usable_eb_size) |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 105 | ret = sprintf(buf, "%d\n", vol->usable_leb_size); |
Artem Bityutskiy | 732aeac | 2007-12-15 15:09:07 +0200 | [diff] [blame] | 106 | else if (attr == &attr_vol_data_bytes) |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 107 | ret = sprintf(buf, "%lld\n", vol->used_bytes); |
Artem Bityutskiy | 8bc2296 | 2007-07-22 15:25:02 +0300 | [diff] [blame] | 108 | else if (attr == &attr_vol_upd_marker) |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 109 | ret = sprintf(buf, "%d\n", vol->upd_marker); |
| 110 | else |
Artem Bityutskiy | d05c77a | 2007-12-17 15:42:57 +0200 | [diff] [blame] | 111 | /* This must be a bug */ |
| 112 | ret = -EINVAL; |
| 113 | |
Artem Bityutskiy | e73f445 | 2007-12-17 17:37:26 +0200 | [diff] [blame] | 114 | /* We've done the operation, drop volume and UBI device references */ |
Artem Bityutskiy | d05c77a | 2007-12-17 15:42:57 +0200 | [diff] [blame] | 115 | spin_lock(&ubi->volumes_lock); |
| 116 | vol->ref_count -= 1; |
| 117 | ubi_assert(vol->ref_count >= 0); |
| 118 | spin_unlock(&ubi->volumes_lock); |
Artem Bityutskiy | e73f445 | 2007-12-17 17:37:26 +0200 | [diff] [blame] | 119 | ubi_put_device(ubi); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 120 | return ret; |
| 121 | } |
| 122 | |
Takashi Iwai | 53cd255 | 2015-05-15 16:20:05 +0800 | [diff] [blame] | 123 | static struct attribute *volume_dev_attrs[] = { |
| 124 | &attr_vol_reserved_ebs.attr, |
| 125 | &attr_vol_type.attr, |
| 126 | &attr_vol_name.attr, |
| 127 | &attr_vol_corrupted.attr, |
| 128 | &attr_vol_alignment.attr, |
| 129 | &attr_vol_usable_eb_size.attr, |
| 130 | &attr_vol_data_bytes.attr, |
| 131 | &attr_vol_upd_marker.attr, |
| 132 | NULL |
| 133 | }; |
| 134 | ATTRIBUTE_GROUPS(volume_dev); |
| 135 | |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 136 | /* Release method for volume devices */ |
| 137 | static void vol_release(struct device *dev) |
| 138 | { |
| 139 | struct ubi_volume *vol = container_of(dev, struct ubi_volume, dev); |
Artem Bityutskiy | 732aeac | 2007-12-15 15:09:07 +0200 | [diff] [blame] | 140 | |
Boris Brezillon | 799dca3 | 2016-09-16 16:59:25 +0200 | [diff] [blame] | 141 | ubi_eba_replace_table(vol, NULL); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 142 | kfree(vol); |
| 143 | } |
| 144 | |
| 145 | /** |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 146 | * ubi_create_volume - create volume. |
| 147 | * @ubi: UBI device description object |
| 148 | * @req: volume creation request |
| 149 | * |
| 150 | * This function creates volume described by @req. If @req->vol_id id |
Artem Bityutskiy | d05c77a | 2007-12-17 15:42:57 +0200 | [diff] [blame] | 151 | * %UBI_VOL_NUM_AUTO, this function automatically assign ID to the new volume |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 152 | * and saves it in @req->vol_id. Returns zero in case of success and a negative |
Artem Bityutskiy | 40e4d0c | 2007-12-17 17:08:55 +0200 | [diff] [blame] | 153 | * error code in case of failure. Note, the caller has to have the |
Artem Bityutskiy | f089c0b | 2009-05-07 11:46:49 +0300 | [diff] [blame] | 154 | * @ubi->device_mutex locked. |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 155 | */ |
| 156 | int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req) |
| 157 | { |
Artem Bityutskiy | abc5e92 | 2008-06-04 16:48:12 +0300 | [diff] [blame] | 158 | int i, err, vol_id = req->vol_id, do_free = 1; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 159 | struct ubi_volume *vol; |
| 160 | struct ubi_vtbl_record vtbl_rec; |
Boris Brezillon | 799dca3 | 2016-09-16 16:59:25 +0200 | [diff] [blame] | 161 | struct ubi_eba_table *eba_tbl = NULL; |
Artem Bityutskiy | 49dfc29 | 2007-12-15 18:13:56 +0200 | [diff] [blame] | 162 | dev_t dev; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 163 | |
| 164 | if (ubi->ro_mode) |
| 165 | return -EROFS; |
| 166 | |
| 167 | vol = kzalloc(sizeof(struct ubi_volume), GFP_KERNEL); |
| 168 | if (!vol) |
| 169 | return -ENOMEM; |
| 170 | |
| 171 | spin_lock(&ubi->volumes_lock); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 172 | if (vol_id == UBI_VOL_NUM_AUTO) { |
| 173 | /* Find unused volume ID */ |
Artem Bityutskiy | c856635 | 2008-07-16 17:40:22 +0300 | [diff] [blame] | 174 | dbg_gen("search for vacant volume ID"); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 175 | for (i = 0; i < ubi->vtbl_slots; i++) |
| 176 | if (!ubi->volumes[i]) { |
| 177 | vol_id = i; |
| 178 | break; |
| 179 | } |
| 180 | |
| 181 | if (vol_id == UBI_VOL_NUM_AUTO) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 182 | ubi_err(ubi, "out of volume IDs"); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 183 | err = -ENFILE; |
| 184 | goto out_unlock; |
| 185 | } |
| 186 | req->vol_id = vol_id; |
| 187 | } |
| 188 | |
Artem Bityutskiy | e1cf7e6 | 2009-05-07 18:24:14 +0300 | [diff] [blame] | 189 | dbg_gen("create device %d, volume %d, %llu bytes, type %d, name %s", |
| 190 | ubi->ubi_num, vol_id, (unsigned long long)req->bytes, |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 191 | (int)req->vol_type, req->name); |
| 192 | |
| 193 | /* Ensure that this volume does not exist */ |
| 194 | err = -EEXIST; |
| 195 | if (ubi->volumes[vol_id]) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 196 | ubi_err(ubi, "volume %d already exists", vol_id); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 197 | goto out_unlock; |
| 198 | } |
| 199 | |
| 200 | /* Ensure that the name is unique */ |
| 201 | for (i = 0; i < ubi->vtbl_slots; i++) |
| 202 | if (ubi->volumes[i] && |
| 203 | ubi->volumes[i]->name_len == req->name_len && |
Artem Bityutskiy | 94784d9 | 2007-06-18 12:06:30 +0300 | [diff] [blame] | 204 | !strcmp(ubi->volumes[i]->name, req->name)) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 205 | ubi_err(ubi, "volume \"%s\" exists (ID %d)", |
| 206 | req->name, i); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 207 | goto out_unlock; |
| 208 | } |
| 209 | |
Artem Bityutskiy | 9c9ec14 | 2008-07-18 13:19:52 +0300 | [diff] [blame] | 210 | /* Calculate how many eraseblocks are requested */ |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 211 | vol->usable_leb_size = ubi->leb_size - ubi->leb_size % req->alignment; |
shengyong | e8d266c | 2015-05-26 10:07:08 +0000 | [diff] [blame] | 212 | vol->reserved_pebs = div_u64(req->bytes + vol->usable_leb_size - 1, |
| 213 | vol->usable_leb_size); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 214 | |
| 215 | /* Reserve physical eraseblocks */ |
| 216 | if (vol->reserved_pebs > ubi->avail_pebs) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 217 | ubi_err(ubi, "not enough PEBs, only %d available", |
| 218 | ubi->avail_pebs); |
Artem Bityutskiy | 5fc01ab | 2010-09-03 23:08:15 +0300 | [diff] [blame] | 219 | if (ubi->corr_peb_count) |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 220 | ubi_err(ubi, "%d PEBs are corrupted and not used", |
Artem Bityutskiy | 5fc01ab | 2010-09-03 23:08:15 +0300 | [diff] [blame] | 221 | ubi->corr_peb_count); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 222 | err = -ENOSPC; |
| 223 | goto out_unlock; |
| 224 | } |
| 225 | ubi->avail_pebs -= vol->reserved_pebs; |
| 226 | ubi->rsvd_pebs += vol->reserved_pebs; |
Artem Bityutskiy | e73f445 | 2007-12-17 17:37:26 +0200 | [diff] [blame] | 227 | spin_unlock(&ubi->volumes_lock); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 228 | |
| 229 | vol->vol_id = vol_id; |
| 230 | vol->alignment = req->alignment; |
| 231 | vol->data_pad = ubi->leb_size % vol->alignment; |
| 232 | vol->vol_type = req->vol_type; |
| 233 | vol->name_len = req->name_len; |
Artem Bityutskiy | a6ea440 | 2008-07-13 21:46:24 +0300 | [diff] [blame] | 234 | memcpy(vol->name, req->name, vol->name_len); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 235 | vol->ubi = ubi; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 236 | |
| 237 | /* |
| 238 | * Finish all pending erases because there may be some LEBs belonging |
| 239 | * to the same volume ID. |
| 240 | */ |
Joel Reardon | 62f38455 | 2012-05-20 21:27:11 +0200 | [diff] [blame] | 241 | err = ubi_wl_flush(ubi, vol_id, UBI_ALL); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 242 | if (err) |
| 243 | goto out_acc; |
| 244 | |
Boris Brezillon | 799dca3 | 2016-09-16 16:59:25 +0200 | [diff] [blame] | 245 | eba_tbl = ubi_eba_create_table(vol, vol->reserved_pebs); |
| 246 | if (IS_ERR(eba_tbl)) { |
| 247 | err = PTR_ERR(eba_tbl); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 248 | goto out_acc; |
| 249 | } |
| 250 | |
Boris Brezillon | 799dca3 | 2016-09-16 16:59:25 +0200 | [diff] [blame] | 251 | ubi_eba_replace_table(vol, eba_tbl); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 252 | |
| 253 | if (vol->vol_type == UBI_DYNAMIC_VOLUME) { |
| 254 | vol->used_ebs = vol->reserved_pebs; |
| 255 | vol->last_eb_bytes = vol->usable_leb_size; |
Vinit Agnihotri | d08c3b7 | 2007-07-10 13:04:59 +0300 | [diff] [blame] | 256 | vol->used_bytes = |
| 257 | (long long)vol->used_ebs * vol->usable_leb_size; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 258 | } else { |
Artem Bityutskiy | 3013ee3 | 2009-01-16 19:08:43 +0200 | [diff] [blame] | 259 | vol->used_ebs = div_u64_rem(vol->used_bytes, |
| 260 | vol->usable_leb_size, |
| 261 | &vol->last_eb_bytes); |
| 262 | if (vol->last_eb_bytes != 0) |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 263 | vol->used_ebs += 1; |
| 264 | else |
| 265 | vol->last_eb_bytes = vol->usable_leb_size; |
| 266 | } |
| 267 | |
Clay McClure | cde0b3a | 2017-09-21 19:01:34 -0700 | [diff] [blame] | 268 | /* Make volume "available" before it becomes accessible via sysfs */ |
| 269 | spin_lock(&ubi->volumes_lock); |
| 270 | ubi->volumes[vol_id] = vol; |
| 271 | ubi->vol_count += 1; |
| 272 | spin_unlock(&ubi->volumes_lock); |
| 273 | |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 274 | /* Register character device for the volume */ |
| 275 | cdev_init(&vol->cdev, &ubi_vol_cdev_operations); |
| 276 | vol->cdev.owner = THIS_MODULE; |
Artem Bityutskiy | 49dfc29 | 2007-12-15 18:13:56 +0200 | [diff] [blame] | 277 | dev = MKDEV(MAJOR(ubi->cdev.dev), vol_id + 1); |
| 278 | err = cdev_add(&vol->cdev, dev, 1); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 279 | if (err) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 280 | ubi_err(ubi, "cannot add character device"); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 281 | goto out_mapping; |
| 282 | } |
| 283 | |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 284 | vol->dev.release = vol_release; |
| 285 | vol->dev.parent = &ubi->dev; |
Artem Bityutskiy | 49dfc29 | 2007-12-15 18:13:56 +0200 | [diff] [blame] | 286 | vol->dev.devt = dev; |
Takashi Iwai | 53cd255 | 2015-05-15 16:20:05 +0800 | [diff] [blame] | 287 | vol->dev.class = &ubi_class; |
| 288 | vol->dev.groups = volume_dev_groups; |
Artem Bityutskiy | fc75a1e | 2007-12-17 14:02:09 +0200 | [diff] [blame] | 289 | |
Kay Sievers | 475b44c | 2009-01-06 10:44:38 -0800 | [diff] [blame] | 290 | dev_set_name(&vol->dev, "%s_%d", ubi->ubi_name, vol->vol_id); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 291 | err = device_register(&vol->dev); |
Artem Bityutskiy | 01f7b30 | 2007-12-15 19:56:51 +0200 | [diff] [blame] | 292 | if (err) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 293 | ubi_err(ubi, "cannot register device"); |
Dmitry Pervushin | 518ceef | 2009-04-29 19:29:44 +0400 | [diff] [blame] | 294 | goto out_cdev; |
Artem Bityutskiy | 01f7b30 | 2007-12-15 19:56:51 +0200 | [diff] [blame] | 295 | } |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 296 | |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 297 | /* Fill volume table record */ |
| 298 | memset(&vtbl_rec, 0, sizeof(struct ubi_vtbl_record)); |
Christoph Hellwig | 3261ebd | 2007-05-21 17:41:46 +0300 | [diff] [blame] | 299 | vtbl_rec.reserved_pebs = cpu_to_be32(vol->reserved_pebs); |
| 300 | vtbl_rec.alignment = cpu_to_be32(vol->alignment); |
| 301 | vtbl_rec.data_pad = cpu_to_be32(vol->data_pad); |
| 302 | vtbl_rec.name_len = cpu_to_be16(vol->name_len); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 303 | if (vol->vol_type == UBI_DYNAMIC_VOLUME) |
| 304 | vtbl_rec.vol_type = UBI_VID_DYNAMIC; |
| 305 | else |
| 306 | vtbl_rec.vol_type = UBI_VID_STATIC; |
Artem Bityutskiy | a6ea440 | 2008-07-13 21:46:24 +0300 | [diff] [blame] | 307 | memcpy(vtbl_rec.name, vol->name, vol->name_len); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 308 | |
| 309 | err = ubi_change_vtbl_record(ubi, vol_id, &vtbl_rec); |
| 310 | if (err) |
| 311 | goto out_sysfs; |
| 312 | |
Dmitry Pervushin | 0e0ee1c | 2009-04-29 19:29:38 +0400 | [diff] [blame] | 313 | ubi_volume_notify(ubi, vol, UBI_VOLUME_ADDED); |
Artem Bityutskiy | 7bf523a | 2012-05-16 18:29:54 +0300 | [diff] [blame] | 314 | self_check_volumes(ubi); |
Artem Bityutskiy | c856635 | 2008-07-16 17:40:22 +0300 | [diff] [blame] | 315 | return err; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 316 | |
Artem Bityutskiy | fc75a1e | 2007-12-17 14:02:09 +0200 | [diff] [blame] | 317 | out_sysfs: |
| 318 | /* |
Artem Bityutskiy | abc5e92 | 2008-06-04 16:48:12 +0300 | [diff] [blame] | 319 | * We have registered our device, we should not free the volume |
Artem Bityutskiy | fc75a1e | 2007-12-17 14:02:09 +0200 | [diff] [blame] | 320 | * description object in this function in case of an error - it is |
| 321 | * freed by the release function. |
| 322 | * |
| 323 | * Get device reference to prevent the release function from being |
| 324 | * called just after sysfs has been closed. |
| 325 | */ |
Artem Bityutskiy | abc5e92 | 2008-06-04 16:48:12 +0300 | [diff] [blame] | 326 | do_free = 0; |
Artem Bityutskiy | fc75a1e | 2007-12-17 14:02:09 +0200 | [diff] [blame] | 327 | get_device(&vol->dev); |
Takashi Iwai | 53cd255 | 2015-05-15 16:20:05 +0800 | [diff] [blame] | 328 | device_unregister(&vol->dev); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 329 | out_cdev: |
| 330 | cdev_del(&vol->cdev); |
| 331 | out_mapping: |
Clay McClure | cde0b3a | 2017-09-21 19:01:34 -0700 | [diff] [blame] | 332 | spin_lock(&ubi->volumes_lock); |
| 333 | ubi->volumes[vol_id] = NULL; |
| 334 | ubi->vol_count -= 1; |
| 335 | spin_unlock(&ubi->volumes_lock); |
Artem Bityutskiy | abc5e92 | 2008-06-04 16:48:12 +0300 | [diff] [blame] | 336 | if (do_free) |
Boris Brezillon | 799dca3 | 2016-09-16 16:59:25 +0200 | [diff] [blame] | 337 | ubi_eba_destroy_table(eba_tbl); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 338 | out_acc: |
| 339 | spin_lock(&ubi->volumes_lock); |
| 340 | ubi->rsvd_pebs -= vol->reserved_pebs; |
| 341 | ubi->avail_pebs += vol->reserved_pebs; |
| 342 | out_unlock: |
| 343 | spin_unlock(&ubi->volumes_lock); |
Artem Bityutskiy | abc5e92 | 2008-06-04 16:48:12 +0300 | [diff] [blame] | 344 | if (do_free) |
Artem Bityutskiy | fc75a1e | 2007-12-17 14:02:09 +0200 | [diff] [blame] | 345 | kfree(vol); |
Artem Bityutskiy | abc5e92 | 2008-06-04 16:48:12 +0300 | [diff] [blame] | 346 | else |
| 347 | put_device(&vol->dev); |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 348 | ubi_err(ubi, "cannot create volume %d, error %d", vol_id, err); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 349 | return err; |
| 350 | } |
| 351 | |
| 352 | /** |
| 353 | * ubi_remove_volume - remove volume. |
| 354 | * @desc: volume descriptor |
Artem Bityutskiy | f40ac9c | 2008-07-13 21:47:47 +0300 | [diff] [blame] | 355 | * @no_vtbl: do not change volume table if not zero |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 356 | * |
| 357 | * This function removes volume described by @desc. The volume has to be opened |
| 358 | * in "exclusive" mode. Returns zero in case of success and a negative error |
Artem Bityutskiy | f089c0b | 2009-05-07 11:46:49 +0300 | [diff] [blame] | 359 | * code in case of failure. The caller has to have the @ubi->device_mutex |
Artem Bityutskiy | 40e4d0c | 2007-12-17 17:08:55 +0200 | [diff] [blame] | 360 | * locked. |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 361 | */ |
Artem Bityutskiy | f40ac9c | 2008-07-13 21:47:47 +0300 | [diff] [blame] | 362 | int ubi_remove_volume(struct ubi_volume_desc *desc, int no_vtbl) |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 363 | { |
| 364 | struct ubi_volume *vol = desc->vol; |
| 365 | struct ubi_device *ubi = vol->ubi; |
| 366 | int i, err, vol_id = vol->vol_id, reserved_pebs = vol->reserved_pebs; |
| 367 | |
Artem Bityutskiy | e1cf7e6 | 2009-05-07 18:24:14 +0300 | [diff] [blame] | 368 | dbg_gen("remove device %d, volume %d", ubi->ubi_num, vol_id); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 369 | ubi_assert(desc->mode == UBI_EXCLUSIVE); |
| 370 | ubi_assert(vol == ubi->volumes[vol_id]); |
| 371 | |
| 372 | if (ubi->ro_mode) |
| 373 | return -EROFS; |
| 374 | |
Artem Bityutskiy | d05c77a | 2007-12-17 15:42:57 +0200 | [diff] [blame] | 375 | spin_lock(&ubi->volumes_lock); |
| 376 | if (vol->ref_count > 1) { |
| 377 | /* |
| 378 | * The volume is busy, probably someone is reading one of its |
| 379 | * sysfs files. |
| 380 | */ |
| 381 | err = -EBUSY; |
| 382 | goto out_unlock; |
| 383 | } |
| 384 | ubi->volumes[vol_id] = NULL; |
| 385 | spin_unlock(&ubi->volumes_lock); |
| 386 | |
Artem Bityutskiy | f40ac9c | 2008-07-13 21:47:47 +0300 | [diff] [blame] | 387 | if (!no_vtbl) { |
| 388 | err = ubi_change_vtbl_record(ubi, vol_id, NULL); |
| 389 | if (err) |
| 390 | goto out_err; |
| 391 | } |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 392 | |
| 393 | for (i = 0; i < vol->reserved_pebs; i++) { |
Artem Bityutskiy | 89b96b6 | 2007-12-16 20:00:38 +0200 | [diff] [blame] | 394 | err = ubi_eba_unmap_leb(ubi, vol, i); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 395 | if (err) |
Artem Bityutskiy | d05c77a | 2007-12-17 15:42:57 +0200 | [diff] [blame] | 396 | goto out_err; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 397 | } |
| 398 | |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 399 | cdev_del(&vol->cdev); |
Takashi Iwai | 53cd255 | 2015-05-15 16:20:05 +0800 | [diff] [blame] | 400 | device_unregister(&vol->dev); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 401 | |
| 402 | spin_lock(&ubi->volumes_lock); |
| 403 | ubi->rsvd_pebs -= reserved_pebs; |
| 404 | ubi->avail_pebs += reserved_pebs; |
Shmulik Ladkani | 87e773c | 2012-07-04 11:06:04 +0300 | [diff] [blame] | 405 | ubi_update_reserved(ubi); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 406 | ubi->vol_count -= 1; |
| 407 | spin_unlock(&ubi->volumes_lock); |
| 408 | |
Dmitry Pervushin | 0e0ee1c | 2009-04-29 19:29:38 +0400 | [diff] [blame] | 409 | ubi_volume_notify(ubi, vol, UBI_VOLUME_REMOVED); |
Artem Bityutskiy | 7bf523a | 2012-05-16 18:29:54 +0300 | [diff] [blame] | 410 | if (!no_vtbl) |
| 411 | self_check_volumes(ubi); |
Artem Bityutskiy | d38dce5 | 2009-05-13 14:05:24 +0300 | [diff] [blame] | 412 | |
Dan Carpenter | fadb366 | 2016-04-13 09:41:26 +0300 | [diff] [blame] | 413 | return 0; |
Artem Bityutskiy | d05c77a | 2007-12-17 15:42:57 +0200 | [diff] [blame] | 414 | |
| 415 | out_err: |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 416 | ubi_err(ubi, "cannot remove volume %d, error %d", vol_id, err); |
Artem Bityutskiy | d05c77a | 2007-12-17 15:42:57 +0200 | [diff] [blame] | 417 | spin_lock(&ubi->volumes_lock); |
| 418 | ubi->volumes[vol_id] = vol; |
| 419 | out_unlock: |
| 420 | spin_unlock(&ubi->volumes_lock); |
Artem Bityutskiy | cae0a77 | 2007-12-17 12:46:48 +0200 | [diff] [blame] | 421 | return err; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 422 | } |
| 423 | |
| 424 | /** |
| 425 | * ubi_resize_volume - re-size volume. |
| 426 | * @desc: volume descriptor |
| 427 | * @reserved_pebs: new size in physical eraseblocks |
| 428 | * |
Artem Bityutskiy | 40e4d0c | 2007-12-17 17:08:55 +0200 | [diff] [blame] | 429 | * This function re-sizes the volume and returns zero in case of success, and a |
| 430 | * negative error code in case of failure. The caller has to have the |
Artem Bityutskiy | f089c0b | 2009-05-07 11:46:49 +0300 | [diff] [blame] | 431 | * @ubi->device_mutex locked. |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 432 | */ |
| 433 | int ubi_resize_volume(struct ubi_volume_desc *desc, int reserved_pebs) |
| 434 | { |
Boris Brezillon | 799dca3 | 2016-09-16 16:59:25 +0200 | [diff] [blame] | 435 | int i, err, pebs; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 436 | struct ubi_volume *vol = desc->vol; |
| 437 | struct ubi_device *ubi = vol->ubi; |
| 438 | struct ubi_vtbl_record vtbl_rec; |
Boris Brezillon | 799dca3 | 2016-09-16 16:59:25 +0200 | [diff] [blame] | 439 | struct ubi_eba_table *new_eba_tbl = NULL; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 440 | int vol_id = vol->vol_id; |
| 441 | |
| 442 | if (ubi->ro_mode) |
| 443 | return -EROFS; |
| 444 | |
Artem Bityutskiy | e1cf7e6 | 2009-05-07 18:24:14 +0300 | [diff] [blame] | 445 | dbg_gen("re-size device %d, volume %d to from %d to %d PEBs", |
| 446 | ubi->ubi_num, vol_id, vol->reserved_pebs, reserved_pebs); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 447 | |
| 448 | if (vol->vol_type == UBI_STATIC_VOLUME && |
| 449 | reserved_pebs < vol->used_ebs) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 450 | ubi_err(ubi, "too small size %d, %d LEBs contain data", |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 451 | reserved_pebs, vol->used_ebs); |
| 452 | return -EINVAL; |
| 453 | } |
| 454 | |
| 455 | /* If the size is the same, we have nothing to do */ |
| 456 | if (reserved_pebs == vol->reserved_pebs) |
| 457 | return 0; |
| 458 | |
Boris Brezillon | 799dca3 | 2016-09-16 16:59:25 +0200 | [diff] [blame] | 459 | new_eba_tbl = ubi_eba_create_table(vol, reserved_pebs); |
| 460 | if (IS_ERR(new_eba_tbl)) |
| 461 | return PTR_ERR(new_eba_tbl); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 462 | |
Artem Bityutskiy | d05c77a | 2007-12-17 15:42:57 +0200 | [diff] [blame] | 463 | spin_lock(&ubi->volumes_lock); |
| 464 | if (vol->ref_count > 1) { |
| 465 | spin_unlock(&ubi->volumes_lock); |
| 466 | err = -EBUSY; |
| 467 | goto out_free; |
| 468 | } |
| 469 | spin_unlock(&ubi->volumes_lock); |
| 470 | |
Artem Bityutskiy | d05c77a | 2007-12-17 15:42:57 +0200 | [diff] [blame] | 471 | /* Reserve physical eraseblocks */ |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 472 | pebs = reserved_pebs - vol->reserved_pebs; |
| 473 | if (pebs > 0) { |
| 474 | spin_lock(&ubi->volumes_lock); |
| 475 | if (pebs > ubi->avail_pebs) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 476 | ubi_err(ubi, "not enough PEBs: requested %d, available %d", |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 477 | pebs, ubi->avail_pebs); |
Artem Bityutskiy | 5fc01ab | 2010-09-03 23:08:15 +0300 | [diff] [blame] | 478 | if (ubi->corr_peb_count) |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 479 | ubi_err(ubi, "%d PEBs are corrupted and not used", |
Artem Bityutskiy | 5fc01ab | 2010-09-03 23:08:15 +0300 | [diff] [blame] | 480 | ubi->corr_peb_count); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 481 | spin_unlock(&ubi->volumes_lock); |
| 482 | err = -ENOSPC; |
| 483 | goto out_free; |
| 484 | } |
| 485 | ubi->avail_pebs -= pebs; |
| 486 | ubi->rsvd_pebs += pebs; |
Boris Brezillon | 799dca3 | 2016-09-16 16:59:25 +0200 | [diff] [blame] | 487 | ubi_eba_copy_table(vol, new_eba_tbl, vol->reserved_pebs); |
| 488 | ubi_eba_replace_table(vol, new_eba_tbl); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 489 | spin_unlock(&ubi->volumes_lock); |
| 490 | } |
| 491 | |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 492 | if (pebs < 0) { |
| 493 | for (i = 0; i < -pebs; i++) { |
Artem Bityutskiy | 89b96b6 | 2007-12-16 20:00:38 +0200 | [diff] [blame] | 494 | err = ubi_eba_unmap_leb(ubi, vol, reserved_pebs + i); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 495 | if (err) |
| 496 | goto out_acc; |
| 497 | } |
| 498 | spin_lock(&ubi->volumes_lock); |
| 499 | ubi->rsvd_pebs += pebs; |
| 500 | ubi->avail_pebs -= pebs; |
Shmulik Ladkani | 87e773c | 2012-07-04 11:06:04 +0300 | [diff] [blame] | 501 | ubi_update_reserved(ubi); |
Boris Brezillon | 799dca3 | 2016-09-16 16:59:25 +0200 | [diff] [blame] | 502 | ubi_eba_copy_table(vol, new_eba_tbl, reserved_pebs); |
| 503 | ubi_eba_replace_table(vol, new_eba_tbl); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 504 | spin_unlock(&ubi->volumes_lock); |
| 505 | } |
| 506 | |
Richard Weinberger | 4946784b | 2016-06-23 19:30:38 +0200 | [diff] [blame] | 507 | /* |
| 508 | * When we shrink a volume we have to flush all pending (erase) work. |
| 509 | * Otherwise it can happen that upon next attach UBI finds a LEB with |
| 510 | * lnum > highest_lnum and refuses to attach. |
| 511 | */ |
| 512 | if (pebs < 0) { |
| 513 | err = ubi_wl_flush(ubi, vol_id, UBI_ALL); |
| 514 | if (err) |
| 515 | goto out_acc; |
| 516 | } |
| 517 | |
| 518 | /* Change volume table record */ |
| 519 | vtbl_rec = ubi->vtbl[vol_id]; |
| 520 | vtbl_rec.reserved_pebs = cpu_to_be32(reserved_pebs); |
| 521 | err = ubi_change_vtbl_record(ubi, vol_id, &vtbl_rec); |
| 522 | if (err) |
| 523 | goto out_acc; |
| 524 | |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 525 | vol->reserved_pebs = reserved_pebs; |
| 526 | if (vol->vol_type == UBI_DYNAMIC_VOLUME) { |
| 527 | vol->used_ebs = reserved_pebs; |
| 528 | vol->last_eb_bytes = vol->usable_leb_size; |
Vinit Agnihotri | d08c3b7 | 2007-07-10 13:04:59 +0300 | [diff] [blame] | 529 | vol->used_bytes = |
| 530 | (long long)vol->used_ebs * vol->usable_leb_size; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 531 | } |
| 532 | |
Dmitry Pervushin | 0e0ee1c | 2009-04-29 19:29:38 +0400 | [diff] [blame] | 533 | ubi_volume_notify(ubi, vol, UBI_VOLUME_RESIZED); |
Artem Bityutskiy | 7bf523a | 2012-05-16 18:29:54 +0300 | [diff] [blame] | 534 | self_check_volumes(ubi); |
Artem Bityutskiy | c856635 | 2008-07-16 17:40:22 +0300 | [diff] [blame] | 535 | return err; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 536 | |
| 537 | out_acc: |
| 538 | if (pebs > 0) { |
| 539 | spin_lock(&ubi->volumes_lock); |
| 540 | ubi->rsvd_pebs -= pebs; |
| 541 | ubi->avail_pebs += pebs; |
| 542 | spin_unlock(&ubi->volumes_lock); |
| 543 | } |
| 544 | out_free: |
Boris Brezillon | 799dca3 | 2016-09-16 16:59:25 +0200 | [diff] [blame] | 545 | kfree(new_eba_tbl); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 546 | return err; |
| 547 | } |
| 548 | |
| 549 | /** |
Artem Bityutskiy | f40ac9c | 2008-07-13 21:47:47 +0300 | [diff] [blame] | 550 | * ubi_rename_volumes - re-name UBI volumes. |
| 551 | * @ubi: UBI device description object |
Artem Bityutskiy | ebaaf1a | 2008-07-18 13:34:32 +0300 | [diff] [blame] | 552 | * @rename_list: list of &struct ubi_rename_entry objects |
Artem Bityutskiy | f40ac9c | 2008-07-13 21:47:47 +0300 | [diff] [blame] | 553 | * |
| 554 | * This function re-names or removes volumes specified in the re-name list. |
| 555 | * Returns zero in case of success and a negative error code in case of |
| 556 | * failure. |
| 557 | */ |
| 558 | int ubi_rename_volumes(struct ubi_device *ubi, struct list_head *rename_list) |
| 559 | { |
| 560 | int err; |
| 561 | struct ubi_rename_entry *re; |
| 562 | |
| 563 | err = ubi_vtbl_rename_volumes(ubi, rename_list); |
| 564 | if (err) |
| 565 | return err; |
| 566 | |
| 567 | list_for_each_entry(re, rename_list, list) { |
| 568 | if (re->remove) { |
| 569 | err = ubi_remove_volume(re->desc, 1); |
| 570 | if (err) |
| 571 | break; |
| 572 | } else { |
| 573 | struct ubi_volume *vol = re->desc->vol; |
| 574 | |
| 575 | spin_lock(&ubi->volumes_lock); |
| 576 | vol->name_len = re->new_name_len; |
| 577 | memcpy(vol->name, re->new_name, re->new_name_len + 1); |
| 578 | spin_unlock(&ubi->volumes_lock); |
Dmitry Pervushin | 0e0ee1c | 2009-04-29 19:29:38 +0400 | [diff] [blame] | 579 | ubi_volume_notify(ubi, vol, UBI_VOLUME_RENAMED); |
Artem Bityutskiy | f40ac9c | 2008-07-13 21:47:47 +0300 | [diff] [blame] | 580 | } |
| 581 | } |
| 582 | |
Artem Bityutskiy | 7bf523a | 2012-05-16 18:29:54 +0300 | [diff] [blame] | 583 | if (!err) |
| 584 | self_check_volumes(ubi); |
Artem Bityutskiy | f40ac9c | 2008-07-13 21:47:47 +0300 | [diff] [blame] | 585 | return err; |
| 586 | } |
| 587 | |
| 588 | /** |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 589 | * ubi_add_volume - add volume. |
| 590 | * @ubi: UBI device description object |
Artem Bityutskiy | 89b96b6 | 2007-12-16 20:00:38 +0200 | [diff] [blame] | 591 | * @vol: volume description object |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 592 | * |
Artem Bityutskiy | d05c77a | 2007-12-17 15:42:57 +0200 | [diff] [blame] | 593 | * This function adds an existing volume and initializes all its data |
| 594 | * structures. Returns zero in case of success and a negative error code in |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 595 | * case of failure. |
| 596 | */ |
Artem Bityutskiy | 89b96b6 | 2007-12-16 20:00:38 +0200 | [diff] [blame] | 597 | int ubi_add_volume(struct ubi_device *ubi, struct ubi_volume *vol) |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 598 | { |
Artem Bityutskiy | 89b96b6 | 2007-12-16 20:00:38 +0200 | [diff] [blame] | 599 | int err, vol_id = vol->vol_id; |
Artem Bityutskiy | 49dfc29 | 2007-12-15 18:13:56 +0200 | [diff] [blame] | 600 | dev_t dev; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 601 | |
Artem Bityutskiy | c856635 | 2008-07-16 17:40:22 +0300 | [diff] [blame] | 602 | dbg_gen("add volume %d", vol_id); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 603 | |
| 604 | /* Register character device for the volume */ |
| 605 | cdev_init(&vol->cdev, &ubi_vol_cdev_operations); |
| 606 | vol->cdev.owner = THIS_MODULE; |
Artem Bityutskiy | 49dfc29 | 2007-12-15 18:13:56 +0200 | [diff] [blame] | 607 | dev = MKDEV(MAJOR(ubi->cdev.dev), vol->vol_id + 1); |
| 608 | err = cdev_add(&vol->cdev, dev, 1); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 609 | if (err) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 610 | ubi_err(ubi, "cannot add character device for volume %d, error %d", |
Artem Bityutskiy | 01f7b30 | 2007-12-15 19:56:51 +0200 | [diff] [blame] | 611 | vol_id, err); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 612 | return err; |
| 613 | } |
| 614 | |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 615 | vol->dev.release = vol_release; |
| 616 | vol->dev.parent = &ubi->dev; |
Artem Bityutskiy | 49dfc29 | 2007-12-15 18:13:56 +0200 | [diff] [blame] | 617 | vol->dev.devt = dev; |
Takashi Iwai | 53cd255 | 2015-05-15 16:20:05 +0800 | [diff] [blame] | 618 | vol->dev.class = &ubi_class; |
| 619 | vol->dev.groups = volume_dev_groups; |
Kay Sievers | 475b44c | 2009-01-06 10:44:38 -0800 | [diff] [blame] | 620 | dev_set_name(&vol->dev, "%s_%d", ubi->ubi_name, vol->vol_id); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 621 | err = device_register(&vol->dev); |
| 622 | if (err) |
Dmitry Pervushin | 518ceef | 2009-04-29 19:29:44 +0400 | [diff] [blame] | 623 | goto out_cdev; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 624 | |
Artem Bityutskiy | 7bf523a | 2012-05-16 18:29:54 +0300 | [diff] [blame] | 625 | self_check_volumes(ubi); |
Artem Bityutskiy | c856635 | 2008-07-16 17:40:22 +0300 | [diff] [blame] | 626 | return err; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 627 | |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 628 | out_cdev: |
| 629 | cdev_del(&vol->cdev); |
| 630 | return err; |
| 631 | } |
| 632 | |
| 633 | /** |
| 634 | * ubi_free_volume - free volume. |
| 635 | * @ubi: UBI device description object |
Artem Bityutskiy | 89b96b6 | 2007-12-16 20:00:38 +0200 | [diff] [blame] | 636 | * @vol: volume description object |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 637 | * |
Artem Bityutskiy | 89b96b6 | 2007-12-16 20:00:38 +0200 | [diff] [blame] | 638 | * This function frees all resources for volume @vol but does not remove it. |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 639 | * Used only when the UBI device is detached. |
| 640 | */ |
Artem Bityutskiy | 89b96b6 | 2007-12-16 20:00:38 +0200 | [diff] [blame] | 641 | void ubi_free_volume(struct ubi_device *ubi, struct ubi_volume *vol) |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 642 | { |
Artem Bityutskiy | c856635 | 2008-07-16 17:40:22 +0300 | [diff] [blame] | 643 | dbg_gen("free volume %d", vol->vol_id); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 644 | |
Artem Bityutskiy | 89b96b6 | 2007-12-16 20:00:38 +0200 | [diff] [blame] | 645 | ubi->volumes[vol->vol_id] = NULL; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 646 | cdev_del(&vol->cdev); |
Takashi Iwai | 53cd255 | 2015-05-15 16:20:05 +0800 | [diff] [blame] | 647 | device_unregister(&vol->dev); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 648 | } |
| 649 | |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 650 | /** |
Artem Bityutskiy | 7bf523a | 2012-05-16 18:29:54 +0300 | [diff] [blame] | 651 | * self_check_volume - check volume information. |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 652 | * @ubi: UBI device description object |
| 653 | * @vol_id: volume ID |
Artem Bityutskiy | c856635 | 2008-07-16 17:40:22 +0300 | [diff] [blame] | 654 | * |
| 655 | * Returns zero if volume is all right and a a negative error code if not. |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 656 | */ |
Artem Bityutskiy | 7bf523a | 2012-05-16 18:29:54 +0300 | [diff] [blame] | 657 | static int self_check_volume(struct ubi_device *ubi, int vol_id) |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 658 | { |
| 659 | int idx = vol_id2idx(ubi, vol_id); |
| 660 | int reserved_pebs, alignment, data_pad, vol_type, name_len, upd_marker; |
Artem Bityutskiy | b89044b | 2007-06-18 16:29:30 +0300 | [diff] [blame] | 661 | const struct ubi_volume *vol; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 662 | long long n; |
| 663 | const char *name; |
| 664 | |
Artem Bityutskiy | b89044b | 2007-06-18 16:29:30 +0300 | [diff] [blame] | 665 | spin_lock(&ubi->volumes_lock); |
Christoph Hellwig | 3261ebd | 2007-05-21 17:41:46 +0300 | [diff] [blame] | 666 | reserved_pebs = be32_to_cpu(ubi->vtbl[vol_id].reserved_pebs); |
Artem Bityutskiy | b89044b | 2007-06-18 16:29:30 +0300 | [diff] [blame] | 667 | vol = ubi->volumes[idx]; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 668 | |
| 669 | if (!vol) { |
| 670 | if (reserved_pebs) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 671 | ubi_err(ubi, "no volume info, but volume exists"); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 672 | goto fail; |
| 673 | } |
Artem Bityutskiy | b89044b | 2007-06-18 16:29:30 +0300 | [diff] [blame] | 674 | spin_unlock(&ubi->volumes_lock); |
Artem Bityutskiy | c856635 | 2008-07-16 17:40:22 +0300 | [diff] [blame] | 675 | return 0; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 676 | } |
| 677 | |
| 678 | if (vol->reserved_pebs < 0 || vol->alignment < 0 || vol->data_pad < 0 || |
| 679 | vol->name_len < 0) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 680 | ubi_err(ubi, "negative values"); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 681 | goto fail; |
| 682 | } |
| 683 | if (vol->alignment > ubi->leb_size || vol->alignment == 0) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 684 | ubi_err(ubi, "bad alignment"); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 685 | goto fail; |
| 686 | } |
| 687 | |
Kyungmin Park | cadb40c | 2008-05-22 10:32:18 +0900 | [diff] [blame] | 688 | n = vol->alignment & (ubi->min_io_size - 1); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 689 | if (vol->alignment != 1 && n) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 690 | ubi_err(ubi, "alignment is not multiple of min I/O unit"); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 691 | goto fail; |
| 692 | } |
| 693 | |
| 694 | n = ubi->leb_size % vol->alignment; |
| 695 | if (vol->data_pad != n) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 696 | ubi_err(ubi, "bad data_pad, has to be %lld", n); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 697 | goto fail; |
| 698 | } |
| 699 | |
| 700 | if (vol->vol_type != UBI_DYNAMIC_VOLUME && |
| 701 | vol->vol_type != UBI_STATIC_VOLUME) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 702 | ubi_err(ubi, "bad vol_type"); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 703 | goto fail; |
| 704 | } |
| 705 | |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 706 | if (vol->upd_marker && vol->corrupted) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 707 | ubi_err(ubi, "update marker and corrupted simultaneously"); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 708 | goto fail; |
| 709 | } |
| 710 | |
| 711 | if (vol->reserved_pebs > ubi->good_peb_count) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 712 | ubi_err(ubi, "too large reserved_pebs"); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 713 | goto fail; |
| 714 | } |
| 715 | |
| 716 | n = ubi->leb_size - vol->data_pad; |
| 717 | if (vol->usable_leb_size != ubi->leb_size - vol->data_pad) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 718 | ubi_err(ubi, "bad usable_leb_size, has to be %lld", n); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 719 | goto fail; |
| 720 | } |
| 721 | |
| 722 | if (vol->name_len > UBI_VOL_NAME_MAX) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 723 | ubi_err(ubi, "too long volume name, max is %d", |
| 724 | UBI_VOL_NAME_MAX); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 725 | goto fail; |
| 726 | } |
| 727 | |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 728 | n = strnlen(vol->name, vol->name_len + 1); |
| 729 | if (n != vol->name_len) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 730 | ubi_err(ubi, "bad name_len %lld", n); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 731 | goto fail; |
| 732 | } |
| 733 | |
Vinit Agnihotri | d08c3b7 | 2007-07-10 13:04:59 +0300 | [diff] [blame] | 734 | n = (long long)vol->used_ebs * vol->usable_leb_size; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 735 | if (vol->vol_type == UBI_DYNAMIC_VOLUME) { |
Artem Bityutskiy | 896c0c0 | 2008-01-16 14:24:14 +0200 | [diff] [blame] | 736 | if (vol->corrupted) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 737 | ubi_err(ubi, "corrupted dynamic volume"); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 738 | goto fail; |
| 739 | } |
| 740 | if (vol->used_ebs != vol->reserved_pebs) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 741 | ubi_err(ubi, "bad used_ebs"); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 742 | goto fail; |
| 743 | } |
| 744 | if (vol->last_eb_bytes != vol->usable_leb_size) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 745 | ubi_err(ubi, "bad last_eb_bytes"); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 746 | goto fail; |
| 747 | } |
| 748 | if (vol->used_bytes != n) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 749 | ubi_err(ubi, "bad used_bytes"); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 750 | goto fail; |
| 751 | } |
| 752 | } else { |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 753 | if (vol->used_ebs < 0 || vol->used_ebs > vol->reserved_pebs) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 754 | ubi_err(ubi, "bad used_ebs"); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 755 | goto fail; |
| 756 | } |
| 757 | if (vol->last_eb_bytes < 0 || |
| 758 | vol->last_eb_bytes > vol->usable_leb_size) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 759 | ubi_err(ubi, "bad last_eb_bytes"); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 760 | goto fail; |
| 761 | } |
| 762 | if (vol->used_bytes < 0 || vol->used_bytes > n || |
| 763 | vol->used_bytes < n - vol->usable_leb_size) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 764 | ubi_err(ubi, "bad used_bytes"); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 765 | goto fail; |
| 766 | } |
| 767 | } |
| 768 | |
Christoph Hellwig | 3261ebd | 2007-05-21 17:41:46 +0300 | [diff] [blame] | 769 | alignment = be32_to_cpu(ubi->vtbl[vol_id].alignment); |
| 770 | data_pad = be32_to_cpu(ubi->vtbl[vol_id].data_pad); |
| 771 | name_len = be16_to_cpu(ubi->vtbl[vol_id].name_len); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 772 | upd_marker = ubi->vtbl[vol_id].upd_marker; |
| 773 | name = &ubi->vtbl[vol_id].name[0]; |
| 774 | if (ubi->vtbl[vol_id].vol_type == UBI_VID_DYNAMIC) |
| 775 | vol_type = UBI_DYNAMIC_VOLUME; |
| 776 | else |
| 777 | vol_type = UBI_STATIC_VOLUME; |
| 778 | |
| 779 | if (alignment != vol->alignment || data_pad != vol->data_pad || |
| 780 | upd_marker != vol->upd_marker || vol_type != vol->vol_type || |
Artem Bityutskiy | 9c9ec14 | 2008-07-18 13:19:52 +0300 | [diff] [blame] | 781 | name_len != vol->name_len || strncmp(name, vol->name, name_len)) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 782 | ubi_err(ubi, "volume info is different"); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 783 | goto fail; |
| 784 | } |
| 785 | |
Artem Bityutskiy | b89044b | 2007-06-18 16:29:30 +0300 | [diff] [blame] | 786 | spin_unlock(&ubi->volumes_lock); |
Artem Bityutskiy | c856635 | 2008-07-16 17:40:22 +0300 | [diff] [blame] | 787 | return 0; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 788 | |
| 789 | fail: |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 790 | ubi_err(ubi, "self-check failed for volume %d", vol_id); |
Artem Bityutskiy | f40ac9c | 2008-07-13 21:47:47 +0300 | [diff] [blame] | 791 | if (vol) |
Artem Bityutskiy | 766381f | 2012-05-16 17:53:17 +0300 | [diff] [blame] | 792 | ubi_dump_vol_info(vol); |
Artem Bityutskiy | 1f021e1d | 2012-05-16 17:56:50 +0300 | [diff] [blame] | 793 | ubi_dump_vtbl_record(&ubi->vtbl[vol_id], vol_id); |
Artem Bityutskiy | cfcf0ec | 2009-05-12 20:29:15 +0300 | [diff] [blame] | 794 | dump_stack(); |
Artem Bityutskiy | b89044b | 2007-06-18 16:29:30 +0300 | [diff] [blame] | 795 | spin_unlock(&ubi->volumes_lock); |
Artem Bityutskiy | c856635 | 2008-07-16 17:40:22 +0300 | [diff] [blame] | 796 | return -EINVAL; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 797 | } |
| 798 | |
| 799 | /** |
Artem Bityutskiy | 7bf523a | 2012-05-16 18:29:54 +0300 | [diff] [blame] | 800 | * self_check_volumes - check information about all volumes. |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 801 | * @ubi: UBI device description object |
Artem Bityutskiy | c856635 | 2008-07-16 17:40:22 +0300 | [diff] [blame] | 802 | * |
| 803 | * Returns zero if volumes are all right and a a negative error code if not. |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 804 | */ |
Artem Bityutskiy | 7bf523a | 2012-05-16 18:29:54 +0300 | [diff] [blame] | 805 | static int self_check_volumes(struct ubi_device *ubi) |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 806 | { |
Artem Bityutskiy | c856635 | 2008-07-16 17:40:22 +0300 | [diff] [blame] | 807 | int i, err = 0; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 808 | |
Ezequiel Garcia | 6457557 | 2012-11-28 09:18:29 -0300 | [diff] [blame] | 809 | if (!ubi_dbg_chk_gen(ubi)) |
Artem Bityutskiy | 92d124f | 2011-03-14 18:17:40 +0200 | [diff] [blame] | 810 | return 0; |
| 811 | |
Artem Bityutskiy | c856635 | 2008-07-16 17:40:22 +0300 | [diff] [blame] | 812 | for (i = 0; i < ubi->vtbl_slots; i++) { |
Artem Bityutskiy | 7bf523a | 2012-05-16 18:29:54 +0300 | [diff] [blame] | 813 | err = self_check_volume(ubi, i); |
Artem Bityutskiy | c856635 | 2008-07-16 17:40:22 +0300 | [diff] [blame] | 814 | if (err) |
| 815 | break; |
| 816 | } |
| 817 | |
| 818 | return err; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 819 | } |