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 | /* |
Artem Bityutskiy | fbd0107 | 2012-05-17 16:12:26 +0300 | [diff] [blame] | 22 | * UBI attaching sub-system. |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 23 | * |
Artem Bityutskiy | fbd0107 | 2012-05-17 16:12:26 +0300 | [diff] [blame] | 24 | * This sub-system is responsible for attaching MTD devices and it also |
| 25 | * implements flash media scanning. |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 26 | * |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 27 | * The attaching information is represented by a &struct ubi_attach_info' |
Artem Bityutskiy | fbd0107 | 2012-05-17 16:12:26 +0300 | [diff] [blame] | 28 | * object. Information about volumes is represented by &struct ubi_ainf_volume |
| 29 | * objects which are kept in volume RB-tree with root at the @volumes field. |
| 30 | * The RB-tree is indexed by the volume ID. |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 31 | * |
Artem Bityutskiy | fbd0107 | 2012-05-17 16:12:26 +0300 | [diff] [blame] | 32 | * Logical eraseblocks are represented by &struct ubi_ainf_peb objects. These |
| 33 | * objects are kept in per-volume RB-trees with the root at the corresponding |
| 34 | * &struct ubi_ainf_volume object. To put it differently, we keep an RB-tree of |
| 35 | * per-volume objects and each of these objects is the root of RB-tree of |
| 36 | * per-LEB objects. |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 37 | * |
| 38 | * Corrupted physical eraseblocks are put to the @corr list, free physical |
| 39 | * eraseblocks are put to the @free list and the physical eraseblock to be |
| 40 | * erased are put to the @erase list. |
Artem Bityutskiy | 0525dac | 2010-09-03 17:11:37 +0300 | [diff] [blame] | 41 | * |
Artem Bityutskiy | fef2deb | 2010-10-29 08:34:50 +0300 | [diff] [blame] | 42 | * About corruptions |
| 43 | * ~~~~~~~~~~~~~~~~~ |
| 44 | * |
| 45 | * UBI protects EC and VID headers with CRC-32 checksums, so it can detect |
| 46 | * whether the headers are corrupted or not. Sometimes UBI also protects the |
| 47 | * data with CRC-32, e.g., when it executes the atomic LEB change operation, or |
| 48 | * when it moves the contents of a PEB for wear-leveling purposes. |
| 49 | * |
Artem Bityutskiy | 0525dac | 2010-09-03 17:11:37 +0300 | [diff] [blame] | 50 | * UBI tries to distinguish between 2 types of corruptions. |
Artem Bityutskiy | fef2deb | 2010-10-29 08:34:50 +0300 | [diff] [blame] | 51 | * |
| 52 | * 1. Corruptions caused by power cuts. These are expected corruptions and UBI |
| 53 | * tries to handle them gracefully, without printing too many warnings and |
Artem Bityutskiy | fbd0107 | 2012-05-17 16:12:26 +0300 | [diff] [blame] | 54 | * error messages. The idea is that we do not lose important data in these |
| 55 | * cases - we may lose only the data which were being written to the media just |
| 56 | * before the power cut happened, and the upper layers (e.g., UBIFS) are |
| 57 | * supposed to handle such data losses (e.g., by using the FS journal). |
Artem Bityutskiy | fef2deb | 2010-10-29 08:34:50 +0300 | [diff] [blame] | 58 | * |
| 59 | * When UBI detects a corruption (CRC-32 mismatch) in a PEB, and it looks like |
| 60 | * the reason is a power cut, UBI puts this PEB to the @erase list, and all |
| 61 | * PEBs in the @erase list are scheduled for erasure later. |
Artem Bityutskiy | 0525dac | 2010-09-03 17:11:37 +0300 | [diff] [blame] | 62 | * |
| 63 | * 2. Unexpected corruptions which are not caused by power cuts. During |
Artem Bityutskiy | fbd0107 | 2012-05-17 16:12:26 +0300 | [diff] [blame] | 64 | * attaching, such PEBs are put to the @corr list and UBI preserves them. |
Artem Bityutskiy | fef2deb | 2010-10-29 08:34:50 +0300 | [diff] [blame] | 65 | * Obviously, this lessens the amount of available PEBs, and if at some point |
| 66 | * UBI runs out of free PEBs, it switches to R/O mode. UBI also loudly informs |
| 67 | * about such PEBs every time the MTD device is attached. |
Artem Bityutskiy | 45aafd3 | 2010-10-20 11:54:58 +0300 | [diff] [blame] | 68 | * |
| 69 | * However, it is difficult to reliably distinguish between these types of |
Artem Bityutskiy | fbd0107 | 2012-05-17 16:12:26 +0300 | [diff] [blame] | 70 | * corruptions and UBI's strategy is as follows (in case of attaching by |
| 71 | * scanning). UBI assumes corruption type 2 if the VID header is corrupted and |
| 72 | * the data area does not contain all 0xFFs, and there were no bit-flips or |
| 73 | * integrity errors (e.g., ECC errors in case of NAND) while reading the data |
| 74 | * area. Otherwise UBI assumes corruption type 1. So the decision criteria |
| 75 | * are as follows. |
| 76 | * o If the data area contains only 0xFFs, there are no data, and it is safe |
Artem Bityutskiy | fef2deb | 2010-10-29 08:34:50 +0300 | [diff] [blame] | 77 | * to just erase this PEB - this is corruption type 1. |
| 78 | * o If the data area has bit-flips or data integrity errors (ECC errors on |
Artem Bityutskiy | 45aafd3 | 2010-10-20 11:54:58 +0300 | [diff] [blame] | 79 | * NAND), it is probably a PEB which was being erased when power cut |
Artem Bityutskiy | fef2deb | 2010-10-29 08:34:50 +0300 | [diff] [blame] | 80 | * happened, so this is corruption type 1. However, this is just a guess, |
| 81 | * which might be wrong. |
Brian Norris | 55393ba | 2012-08-31 14:43:41 -0700 | [diff] [blame] | 82 | * o Otherwise this is corruption type 2. |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 83 | */ |
| 84 | |
| 85 | #include <linux/err.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 86 | #include <linux/slab.h> |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 87 | #include <linux/crc32.h> |
Artem Bityutskiy | 3013ee3 | 2009-01-16 19:08:43 +0200 | [diff] [blame] | 88 | #include <linux/math64.h> |
Matthieu CASTET | 095751a | 2010-06-03 16:14:27 +0200 | [diff] [blame] | 89 | #include <linux/random.h> |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 90 | #include "ubi.h" |
| 91 | |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 92 | static int self_check_ai(struct ubi_device *ubi, struct ubi_attach_info *ai); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 93 | |
Boris Brezillon | de4c455 | 2016-09-16 16:59:14 +0200 | [diff] [blame] | 94 | #define AV_FIND BIT(0) |
| 95 | #define AV_ADD BIT(1) |
| 96 | #define AV_FIND_OR_ADD (AV_FIND | AV_ADD) |
| 97 | |
| 98 | /** |
| 99 | * find_or_add_av - internal function to find a volume, add a volume or do |
| 100 | * both (find and add if missing). |
| 101 | * @ai: attaching information |
| 102 | * @vol_id: the requested volume ID |
| 103 | * @flags: a combination of the %AV_FIND and %AV_ADD flags describing the |
| 104 | * expected operation. If only %AV_ADD is set, -EEXIST is returned |
| 105 | * if the volume already exists. If only %AV_FIND is set, NULL is |
| 106 | * returned if the volume does not exist. And if both flags are |
| 107 | * set, the helper first tries to find an existing volume, and if |
| 108 | * it does not exist it creates a new one. |
| 109 | * @created: in value used to inform the caller whether it"s a newly created |
| 110 | * volume or not. |
| 111 | * |
| 112 | * This function returns a pointer to a volume description or an ERR_PTR if |
| 113 | * the operation failed. It can also return NULL if only %AV_FIND is set and |
| 114 | * the volume does not exist. |
| 115 | */ |
| 116 | static struct ubi_ainf_volume *find_or_add_av(struct ubi_attach_info *ai, |
| 117 | int vol_id, unsigned int flags, |
| 118 | bool *created) |
| 119 | { |
| 120 | struct ubi_ainf_volume *av; |
| 121 | struct rb_node **p = &ai->volumes.rb_node, *parent = NULL; |
| 122 | |
| 123 | /* Walk the volume RB-tree to look if this volume is already present */ |
| 124 | while (*p) { |
| 125 | parent = *p; |
| 126 | av = rb_entry(parent, struct ubi_ainf_volume, rb); |
| 127 | |
| 128 | if (vol_id == av->vol_id) { |
| 129 | *created = false; |
| 130 | |
| 131 | if (!(flags & AV_FIND)) |
| 132 | return ERR_PTR(-EEXIST); |
| 133 | |
| 134 | return av; |
| 135 | } |
| 136 | |
| 137 | if (vol_id > av->vol_id) |
| 138 | p = &(*p)->rb_left; |
| 139 | else |
| 140 | p = &(*p)->rb_right; |
| 141 | } |
| 142 | |
| 143 | if (!(flags & AV_ADD)) |
| 144 | return NULL; |
| 145 | |
| 146 | /* The volume is absent - add it */ |
| 147 | av = kzalloc(sizeof(*av), GFP_KERNEL); |
| 148 | if (!av) |
| 149 | return ERR_PTR(-ENOMEM); |
| 150 | |
| 151 | av->vol_id = vol_id; |
| 152 | |
| 153 | if (vol_id > ai->highest_vol_id) |
| 154 | ai->highest_vol_id = vol_id; |
| 155 | |
| 156 | rb_link_node(&av->rb, parent, p); |
| 157 | rb_insert_color(&av->rb, &ai->volumes); |
| 158 | ai->vols_found += 1; |
| 159 | *created = true; |
| 160 | dbg_bld("added volume %d", vol_id); |
| 161 | return av; |
| 162 | } |
| 163 | |
| 164 | /** |
| 165 | * ubi_find_or_add_av - search for a volume in the attaching information and |
| 166 | * add one if it does not exist. |
| 167 | * @ai: attaching information |
| 168 | * @vol_id: the requested volume ID |
| 169 | * @created: whether the volume has been created or not |
| 170 | * |
| 171 | * This function returns a pointer to the new volume description or an |
| 172 | * ERR_PTR if the operation failed. |
| 173 | */ |
| 174 | static struct ubi_ainf_volume *ubi_find_or_add_av(struct ubi_attach_info *ai, |
| 175 | int vol_id, bool *created) |
| 176 | { |
| 177 | return find_or_add_av(ai, vol_id, AV_FIND_OR_ADD, created); |
| 178 | } |
| 179 | |
Artem Bityutskiy | 941dfb0 | 2007-05-05 16:33:13 +0300 | [diff] [blame] | 180 | /** |
Boris Brezillon | 91f4285 | 2016-09-16 16:59:18 +0200 | [diff] [blame] | 181 | * ubi_alloc_aeb - allocate an aeb element |
| 182 | * @ai: attaching information |
| 183 | * @pnum: physical eraseblock number |
| 184 | * @ec: erase counter of the physical eraseblock |
| 185 | * |
| 186 | * Allocate an aeb object and initialize the pnum and ec information. |
| 187 | * vol_id and lnum are set to UBI_UNKNOWN, and the other fields are |
| 188 | * initialized to zero. |
| 189 | * Note that the element is not added in any list or RB tree. |
| 190 | */ |
| 191 | struct ubi_ainf_peb *ubi_alloc_aeb(struct ubi_attach_info *ai, int pnum, |
| 192 | int ec) |
| 193 | { |
| 194 | struct ubi_ainf_peb *aeb; |
| 195 | |
| 196 | aeb = kmem_cache_zalloc(ai->aeb_slab_cache, GFP_KERNEL); |
| 197 | if (!aeb) |
| 198 | return NULL; |
| 199 | |
| 200 | aeb->pnum = pnum; |
| 201 | aeb->ec = ec; |
| 202 | aeb->vol_id = UBI_UNKNOWN; |
| 203 | aeb->lnum = UBI_UNKNOWN; |
| 204 | |
| 205 | return aeb; |
| 206 | } |
| 207 | |
| 208 | /** |
| 209 | * ubi_free_aeb - free an aeb element |
| 210 | * @ai: attaching information |
| 211 | * @aeb: the element to free |
| 212 | * |
| 213 | * Free an aeb object. The caller must have removed the element from any list |
| 214 | * or RB tree. |
| 215 | */ |
| 216 | void ubi_free_aeb(struct ubi_attach_info *ai, struct ubi_ainf_peb *aeb) |
| 217 | { |
| 218 | kmem_cache_free(ai->aeb_slab_cache, aeb); |
| 219 | } |
| 220 | |
| 221 | /** |
Artem Bityutskiy | 78d87c9 | 2007-05-05 11:24:02 +0300 | [diff] [blame] | 222 | * add_to_list - add physical eraseblock to a list. |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 223 | * @ai: attaching information |
Artem Bityutskiy | 78d87c9 | 2007-05-05 11:24:02 +0300 | [diff] [blame] | 224 | * @pnum: physical eraseblock number to add |
Joel Reardon | 6dd3bc7 | 2012-05-16 14:20:56 +0200 | [diff] [blame] | 225 | * @vol_id: the last used volume id for the PEB |
| 226 | * @lnum: the last used LEB number for the PEB |
Artem Bityutskiy | 78d87c9 | 2007-05-05 11:24:02 +0300 | [diff] [blame] | 227 | * @ec: erase counter of the physical eraseblock |
Artem Bityutskiy | 0525dac | 2010-09-03 17:11:37 +0300 | [diff] [blame] | 228 | * @to_head: if not zero, add to the head of the list |
Artem Bityutskiy | 78d87c9 | 2007-05-05 11:24:02 +0300 | [diff] [blame] | 229 | * @list: the list to add to |
| 230 | * |
Artem Bityutskiy | fbd0107 | 2012-05-17 16:12:26 +0300 | [diff] [blame] | 231 | * This function allocates a 'struct ubi_ainf_peb' object for physical |
| 232 | * eraseblock @pnum and adds it to the "free", "erase", or "alien" lists. |
Joel Reardon | 6dd3bc7 | 2012-05-16 14:20:56 +0200 | [diff] [blame] | 233 | * It stores the @lnum and @vol_id alongside, which can both be |
| 234 | * %UBI_UNKNOWN if they are not available, not readable, or not assigned. |
Artem Bityutskiy | 0525dac | 2010-09-03 17:11:37 +0300 | [diff] [blame] | 235 | * If @to_head is not zero, PEB will be added to the head of the list, which |
| 236 | * basically means it will be processed first later. E.g., we add corrupted |
| 237 | * PEBs (corrupted due to power cuts) to the head of the erase list to make |
| 238 | * sure we erase them first and get rid of corruptions ASAP. This function |
| 239 | * returns zero in case of success and a negative error code in case of |
Artem Bityutskiy | 3fb3412 | 2010-09-03 15:36:12 +0300 | [diff] [blame] | 240 | * failure. |
Artem Bityutskiy | 78d87c9 | 2007-05-05 11:24:02 +0300 | [diff] [blame] | 241 | */ |
Joel Reardon | 6dd3bc7 | 2012-05-16 14:20:56 +0200 | [diff] [blame] | 242 | static int add_to_list(struct ubi_attach_info *ai, int pnum, int vol_id, |
| 243 | int lnum, int ec, int to_head, struct list_head *list) |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 244 | { |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 245 | struct ubi_ainf_peb *aeb; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 246 | |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 247 | if (list == &ai->free) { |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 248 | dbg_bld("add to free: PEB %d, EC %d", pnum, ec); |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 249 | } else if (list == &ai->erase) { |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 250 | dbg_bld("add to erase: PEB %d, EC %d", pnum, ec); |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 251 | } else if (list == &ai->alien) { |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 252 | dbg_bld("add to alien: PEB %d, EC %d", pnum, ec); |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 253 | ai->alien_peb_count += 1; |
Artem Bityutskiy | 33789fb | 2010-04-30 12:31:26 +0300 | [diff] [blame] | 254 | } else |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 255 | BUG(); |
| 256 | |
Boris Brezillon | 91f4285 | 2016-09-16 16:59:18 +0200 | [diff] [blame] | 257 | aeb = ubi_alloc_aeb(ai, pnum, ec); |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 258 | if (!aeb) |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 259 | return -ENOMEM; |
| 260 | |
Joel Reardon | 6dd3bc7 | 2012-05-16 14:20:56 +0200 | [diff] [blame] | 261 | aeb->vol_id = vol_id; |
| 262 | aeb->lnum = lnum; |
Artem Bityutskiy | 0525dac | 2010-09-03 17:11:37 +0300 | [diff] [blame] | 263 | if (to_head) |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 264 | list_add(&aeb->u.list, list); |
Artem Bityutskiy | 0525dac | 2010-09-03 17:11:37 +0300 | [diff] [blame] | 265 | else |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 266 | list_add_tail(&aeb->u.list, list); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 267 | return 0; |
| 268 | } |
| 269 | |
| 270 | /** |
Artem Bityutskiy | 3fb3412 | 2010-09-03 15:36:12 +0300 | [diff] [blame] | 271 | * add_corrupted - add a corrupted physical eraseblock. |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 272 | * @ai: attaching information |
Artem Bityutskiy | 3fb3412 | 2010-09-03 15:36:12 +0300 | [diff] [blame] | 273 | * @pnum: physical eraseblock number to add |
| 274 | * @ec: erase counter of the physical eraseblock |
| 275 | * |
Artem Bityutskiy | fbd0107 | 2012-05-17 16:12:26 +0300 | [diff] [blame] | 276 | * This function allocates a 'struct ubi_ainf_peb' object for a corrupted |
| 277 | * physical eraseblock @pnum and adds it to the 'corr' list. The corruption |
| 278 | * was presumably not caused by a power cut. Returns zero in case of success |
| 279 | * and a negative error code in case of failure. |
Artem Bityutskiy | 3fb3412 | 2010-09-03 15:36:12 +0300 | [diff] [blame] | 280 | */ |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 281 | static int add_corrupted(struct ubi_attach_info *ai, int pnum, int ec) |
Artem Bityutskiy | 3fb3412 | 2010-09-03 15:36:12 +0300 | [diff] [blame] | 282 | { |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 283 | struct ubi_ainf_peb *aeb; |
Artem Bityutskiy | 3fb3412 | 2010-09-03 15:36:12 +0300 | [diff] [blame] | 284 | |
| 285 | dbg_bld("add to corrupted: PEB %d, EC %d", pnum, ec); |
| 286 | |
Boris Brezillon | 91f4285 | 2016-09-16 16:59:18 +0200 | [diff] [blame] | 287 | aeb = ubi_alloc_aeb(ai, pnum, ec); |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 288 | if (!aeb) |
Artem Bityutskiy | 3fb3412 | 2010-09-03 15:36:12 +0300 | [diff] [blame] | 289 | return -ENOMEM; |
| 290 | |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 291 | ai->corr_peb_count += 1; |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 292 | list_add(&aeb->u.list, &ai->corr); |
Artem Bityutskiy | 3fb3412 | 2010-09-03 15:36:12 +0300 | [diff] [blame] | 293 | return 0; |
| 294 | } |
| 295 | |
| 296 | /** |
Richard Weinberger | fdf10ed | 2016-06-14 10:12:15 +0200 | [diff] [blame] | 297 | * add_fastmap - add a Fastmap related physical eraseblock. |
| 298 | * @ai: attaching information |
| 299 | * @pnum: physical eraseblock number the VID header came from |
| 300 | * @vid_hdr: the volume identifier header |
| 301 | * @ec: erase counter of the physical eraseblock |
| 302 | * |
| 303 | * This function allocates a 'struct ubi_ainf_peb' object for a Fastamp |
| 304 | * physical eraseblock @pnum and adds it to the 'fastmap' list. |
| 305 | * Such blocks can be Fastmap super and data blocks from both the most |
| 306 | * recent Fastmap we're attaching from or from old Fastmaps which will |
| 307 | * be erased. |
| 308 | */ |
| 309 | static int add_fastmap(struct ubi_attach_info *ai, int pnum, |
| 310 | struct ubi_vid_hdr *vid_hdr, int ec) |
| 311 | { |
| 312 | struct ubi_ainf_peb *aeb; |
| 313 | |
Boris Brezillon | 91f4285 | 2016-09-16 16:59:18 +0200 | [diff] [blame] | 314 | aeb = ubi_alloc_aeb(ai, pnum, ec); |
Richard Weinberger | fdf10ed | 2016-06-14 10:12:15 +0200 | [diff] [blame] | 315 | if (!aeb) |
| 316 | return -ENOMEM; |
| 317 | |
Boris Brezillon | 3f84e45 | 2016-09-16 16:59:10 +0200 | [diff] [blame] | 318 | aeb->vol_id = be32_to_cpu(vid_hdr->vol_id); |
| 319 | aeb->sqnum = be64_to_cpu(vid_hdr->sqnum); |
Richard Weinberger | fdf10ed | 2016-06-14 10:12:15 +0200 | [diff] [blame] | 320 | list_add(&aeb->u.list, &ai->fastmap); |
| 321 | |
| 322 | dbg_bld("add to fastmap list: PEB %d, vol_id %d, sqnum: %llu", pnum, |
| 323 | aeb->vol_id, aeb->sqnum); |
| 324 | |
| 325 | return 0; |
| 326 | } |
| 327 | |
| 328 | /** |
Artem Bityutskiy | ebaaf1a | 2008-07-18 13:34:32 +0300 | [diff] [blame] | 329 | * validate_vid_hdr - check volume identifier header. |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 330 | * @ubi: UBI device description object |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 331 | * @vid_hdr: the volume identifier header to check |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 332 | * @av: information about the volume this logical eraseblock belongs to |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 333 | * @pnum: physical eraseblock number the VID header came from |
| 334 | * |
| 335 | * This function checks that data stored in @vid_hdr is consistent. Returns |
| 336 | * non-zero if an inconsistency was found and zero if not. |
| 337 | * |
| 338 | * Note, UBI does sanity check of everything it reads from the flash media. |
Artem Bityutskiy | 85c6e6e | 2008-07-16 10:25:56 +0300 | [diff] [blame] | 339 | * Most of the checks are done in the I/O sub-system. Here we check that the |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 340 | * information in the VID header is consistent to the information in other VID |
| 341 | * headers of the same volume. |
| 342 | */ |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 343 | static int validate_vid_hdr(const struct ubi_device *ubi, |
| 344 | const struct ubi_vid_hdr *vid_hdr, |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 345 | const struct ubi_ainf_volume *av, int pnum) |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 346 | { |
| 347 | int vol_type = vid_hdr->vol_type; |
Christoph Hellwig | 3261ebd | 2007-05-21 17:41:46 +0300 | [diff] [blame] | 348 | int vol_id = be32_to_cpu(vid_hdr->vol_id); |
| 349 | int used_ebs = be32_to_cpu(vid_hdr->used_ebs); |
| 350 | int data_pad = be32_to_cpu(vid_hdr->data_pad); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 351 | |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 352 | if (av->leb_count != 0) { |
| 353 | int av_vol_type; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 354 | |
| 355 | /* |
| 356 | * This is not the first logical eraseblock belonging to this |
| 357 | * volume. Ensure that the data in its VID header is consistent |
| 358 | * to the data in previous logical eraseblock headers. |
| 359 | */ |
| 360 | |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 361 | if (vol_id != av->vol_id) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 362 | ubi_err(ubi, "inconsistent vol_id"); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 363 | goto bad; |
| 364 | } |
| 365 | |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 366 | if (av->vol_type == UBI_STATIC_VOLUME) |
| 367 | av_vol_type = UBI_VID_STATIC; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 368 | else |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 369 | av_vol_type = UBI_VID_DYNAMIC; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 370 | |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 371 | if (vol_type != av_vol_type) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 372 | ubi_err(ubi, "inconsistent vol_type"); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 373 | goto bad; |
| 374 | } |
| 375 | |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 376 | if (used_ebs != av->used_ebs) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 377 | ubi_err(ubi, "inconsistent used_ebs"); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 378 | goto bad; |
| 379 | } |
| 380 | |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 381 | if (data_pad != av->data_pad) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 382 | ubi_err(ubi, "inconsistent data_pad"); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 383 | goto bad; |
| 384 | } |
| 385 | } |
| 386 | |
| 387 | return 0; |
| 388 | |
| 389 | bad: |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 390 | ubi_err(ubi, "inconsistent VID header at PEB %d", pnum); |
Artem Bityutskiy | a904e3f | 2012-04-25 09:02:44 +0300 | [diff] [blame] | 391 | ubi_dump_vid_hdr(vid_hdr); |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 392 | ubi_dump_av(av); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 393 | return -EINVAL; |
| 394 | } |
| 395 | |
| 396 | /** |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 397 | * add_volume - add volume to the attaching information. |
| 398 | * @ai: attaching information |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 399 | * @vol_id: ID of the volume to add |
| 400 | * @pnum: physical eraseblock number |
| 401 | * @vid_hdr: volume identifier header |
| 402 | * |
| 403 | * If the volume corresponding to the @vid_hdr logical eraseblock is already |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 404 | * present in the attaching information, this function does nothing. Otherwise |
| 405 | * it adds corresponding volume to the attaching information. Returns a pointer |
Artem Bityutskiy | fbd0107 | 2012-05-17 16:12:26 +0300 | [diff] [blame] | 406 | * to the allocated "av" object in case of success and a negative error code in |
| 407 | * case of failure. |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 408 | */ |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 409 | static struct ubi_ainf_volume *add_volume(struct ubi_attach_info *ai, |
Artem Bityutskiy | afc15a8 | 2012-05-17 07:46:17 +0300 | [diff] [blame] | 410 | int vol_id, int pnum, |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 411 | const struct ubi_vid_hdr *vid_hdr) |
| 412 | { |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 413 | struct ubi_ainf_volume *av; |
Boris Brezillon | de4c455 | 2016-09-16 16:59:14 +0200 | [diff] [blame] | 414 | bool created; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 415 | |
Christoph Hellwig | 3261ebd | 2007-05-21 17:41:46 +0300 | [diff] [blame] | 416 | ubi_assert(vol_id == be32_to_cpu(vid_hdr->vol_id)); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 417 | |
Boris Brezillon | de4c455 | 2016-09-16 16:59:14 +0200 | [diff] [blame] | 418 | av = ubi_find_or_add_av(ai, vol_id, &created); |
| 419 | if (IS_ERR(av) || !created) |
| 420 | return av; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 421 | |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 422 | av->used_ebs = be32_to_cpu(vid_hdr->used_ebs); |
| 423 | av->data_pad = be32_to_cpu(vid_hdr->data_pad); |
| 424 | av->compat = vid_hdr->compat; |
| 425 | av->vol_type = vid_hdr->vol_type == UBI_VID_DYNAMIC ? UBI_DYNAMIC_VOLUME |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 426 | : UBI_STATIC_VOLUME; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 427 | |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 428 | return av; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 429 | } |
| 430 | |
| 431 | /** |
Richard Weinberger | dac6e20 | 2012-09-26 17:51:47 +0200 | [diff] [blame] | 432 | * ubi_compare_lebs - find out which logical eraseblock is newer. |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 433 | * @ubi: UBI device description object |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 434 | * @aeb: first logical eraseblock to compare |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 435 | * @pnum: physical eraseblock number of the second logical eraseblock to |
| 436 | * compare |
| 437 | * @vid_hdr: volume identifier header of the second logical eraseblock |
| 438 | * |
| 439 | * This function compares 2 copies of a LEB and informs which one is newer. In |
| 440 | * case of success this function returns a positive value, in case of failure, a |
| 441 | * negative error code is returned. The success return codes use the following |
| 442 | * bits: |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 443 | * o bit 0 is cleared: the first PEB (described by @aeb) is newer than the |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 444 | * second PEB (described by @pnum and @vid_hdr); |
| 445 | * o bit 0 is set: the second PEB is newer; |
| 446 | * o bit 1 is cleared: no bit-flips were detected in the newer LEB; |
| 447 | * o bit 1 is set: bit-flips were detected in the newer LEB; |
| 448 | * o bit 2 is cleared: the older LEB is not corrupted; |
| 449 | * o bit 2 is set: the older LEB is corrupted. |
| 450 | */ |
Richard Weinberger | dac6e20 | 2012-09-26 17:51:47 +0200 | [diff] [blame] | 451 | int ubi_compare_lebs(struct ubi_device *ubi, const struct ubi_ainf_peb *aeb, |
Artem Bityutskiy | e88d6e10 | 2007-08-29 14:51:52 +0300 | [diff] [blame] | 452 | int pnum, const struct ubi_vid_hdr *vid_hdr) |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 453 | { |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 454 | int len, err, second_is_newer, bitflips = 0, corrupted = 0; |
| 455 | uint32_t data_crc, crc; |
Boris Brezillon | 3291b52 | 2016-09-16 16:59:26 +0200 | [diff] [blame] | 456 | struct ubi_vid_io_buf *vidb = NULL; |
Christoph Hellwig | 3261ebd | 2007-05-21 17:41:46 +0300 | [diff] [blame] | 457 | unsigned long long sqnum2 = be64_to_cpu(vid_hdr->sqnum); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 458 | |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 459 | if (sqnum2 == aeb->sqnum) { |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 460 | /* |
Artem Bityutskiy | 9869cd8 | 2008-07-18 13:53:39 +0300 | [diff] [blame] | 461 | * This must be a really ancient UBI image which has been |
| 462 | * created before sequence numbers support has been added. At |
| 463 | * that times we used 32-bit LEB versions stored in logical |
| 464 | * eraseblocks. That was before UBI got into mainline. We do not |
Artem Bityutskiy | 0525dac | 2010-09-03 17:11:37 +0300 | [diff] [blame] | 465 | * support these images anymore. Well, those images still work, |
| 466 | * but only if no unclean reboots happened. |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 467 | */ |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 468 | ubi_err(ubi, "unsupported on-flash UBI format"); |
Artem Bityutskiy | 9869cd8 | 2008-07-18 13:53:39 +0300 | [diff] [blame] | 469 | return -EINVAL; |
| 470 | } |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 471 | |
Artem Bityutskiy | 9869cd8 | 2008-07-18 13:53:39 +0300 | [diff] [blame] | 472 | /* Obviously the LEB with lower sequence counter is older */ |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 473 | second_is_newer = (sqnum2 > aeb->sqnum); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 474 | |
| 475 | /* |
| 476 | * Now we know which copy is newer. If the copy flag of the PEB with |
| 477 | * newer version is not set, then we just return, otherwise we have to |
| 478 | * check data CRC. For the second PEB we already have the VID header, |
| 479 | * for the first one - we'll need to re-read it from flash. |
| 480 | * |
Artem Bityutskiy | 9869cd8 | 2008-07-18 13:53:39 +0300 | [diff] [blame] | 481 | * Note: this may be optimized so that we wouldn't read twice. |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 482 | */ |
| 483 | |
| 484 | if (second_is_newer) { |
| 485 | if (!vid_hdr->copy_flag) { |
| 486 | /* It is not a copy, so it is newer */ |
| 487 | dbg_bld("second PEB %d is newer, copy_flag is unset", |
| 488 | pnum); |
| 489 | return 1; |
| 490 | } |
| 491 | } else { |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 492 | if (!aeb->copy_flag) { |
Artem Bityutskiy | fb22b59 | 2010-10-19 22:00:11 +0300 | [diff] [blame] | 493 | /* It is not a copy, so it is newer */ |
| 494 | dbg_bld("first PEB %d is newer, copy_flag is unset", |
| 495 | pnum); |
| 496 | return bitflips << 1; |
| 497 | } |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 498 | |
Boris Brezillon | 3291b52 | 2016-09-16 16:59:26 +0200 | [diff] [blame] | 499 | vidb = ubi_alloc_vid_buf(ubi, GFP_KERNEL); |
| 500 | if (!vidb) |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 501 | return -ENOMEM; |
| 502 | |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 503 | pnum = aeb->pnum; |
Boris Brezillon | 3291b52 | 2016-09-16 16:59:26 +0200 | [diff] [blame] | 504 | err = ubi_io_read_vid_hdr(ubi, pnum, vidb, 0); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 505 | if (err) { |
| 506 | if (err == UBI_IO_BITFLIPS) |
| 507 | bitflips = 1; |
| 508 | else { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 509 | ubi_err(ubi, "VID of PEB %d header is bad, but it was OK earlier, err %d", |
Artem Bityutskiy | 049333c | 2012-08-27 14:43:54 +0300 | [diff] [blame] | 510 | pnum, err); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 511 | if (err > 0) |
| 512 | err = -EIO; |
| 513 | |
| 514 | goto out_free_vidh; |
| 515 | } |
| 516 | } |
| 517 | |
Boris Brezillon | 3291b52 | 2016-09-16 16:59:26 +0200 | [diff] [blame] | 518 | vid_hdr = ubi_get_vid_hdr(vidb); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 519 | } |
| 520 | |
| 521 | /* Read the data of the copy and check the CRC */ |
| 522 | |
Christoph Hellwig | 3261ebd | 2007-05-21 17:41:46 +0300 | [diff] [blame] | 523 | len = be32_to_cpu(vid_hdr->data_size); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 524 | |
Artem Bityutskiy | d125a75 | 2012-10-26 16:11:26 +0300 | [diff] [blame] | 525 | mutex_lock(&ubi->buf_mutex); |
| 526 | err = ubi_io_read_data(ubi, ubi->peb_buf, pnum, 0, len); |
Brian Norris | d57f4054 | 2011-09-20 18:34:25 -0700 | [diff] [blame] | 527 | if (err && err != UBI_IO_BITFLIPS && !mtd_is_eccerr(err)) |
Artem Bityutskiy | d125a75 | 2012-10-26 16:11:26 +0300 | [diff] [blame] | 528 | goto out_unlock; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 529 | |
Christoph Hellwig | 3261ebd | 2007-05-21 17:41:46 +0300 | [diff] [blame] | 530 | data_crc = be32_to_cpu(vid_hdr->data_crc); |
Artem Bityutskiy | d125a75 | 2012-10-26 16:11:26 +0300 | [diff] [blame] | 531 | crc = crc32(UBI_CRC32_INIT, ubi->peb_buf, len); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 532 | if (crc != data_crc) { |
| 533 | dbg_bld("PEB %d CRC error: calculated %#08x, must be %#08x", |
| 534 | pnum, crc, data_crc); |
| 535 | corrupted = 1; |
| 536 | bitflips = 0; |
| 537 | second_is_newer = !second_is_newer; |
| 538 | } else { |
| 539 | dbg_bld("PEB %d CRC is OK", pnum); |
Brian Norris | 8eef7d7 | 2015-02-28 02:23:25 -0800 | [diff] [blame] | 540 | bitflips |= !!err; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 541 | } |
Artem Bityutskiy | d125a75 | 2012-10-26 16:11:26 +0300 | [diff] [blame] | 542 | mutex_unlock(&ubi->buf_mutex); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 543 | |
Boris Brezillon | 3291b52 | 2016-09-16 16:59:26 +0200 | [diff] [blame] | 544 | ubi_free_vid_buf(vidb); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 545 | |
| 546 | if (second_is_newer) |
| 547 | dbg_bld("second PEB %d is newer, copy_flag is set", pnum); |
| 548 | else |
| 549 | dbg_bld("first PEB %d is newer, copy_flag is set", pnum); |
| 550 | |
| 551 | return second_is_newer | (bitflips << 1) | (corrupted << 2); |
| 552 | |
Artem Bityutskiy | d125a75 | 2012-10-26 16:11:26 +0300 | [diff] [blame] | 553 | out_unlock: |
| 554 | mutex_unlock(&ubi->buf_mutex); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 555 | out_free_vidh: |
Boris Brezillon | 3291b52 | 2016-09-16 16:59:26 +0200 | [diff] [blame] | 556 | ubi_free_vid_buf(vidb); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 557 | return err; |
| 558 | } |
| 559 | |
| 560 | /** |
Artem Bityutskiy | fbd0107 | 2012-05-17 16:12:26 +0300 | [diff] [blame] | 561 | * ubi_add_to_av - add used physical eraseblock to the attaching information. |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 562 | * @ubi: UBI device description object |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 563 | * @ai: attaching information |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 564 | * @pnum: the physical eraseblock number |
| 565 | * @ec: erase counter |
| 566 | * @vid_hdr: the volume identifier header |
| 567 | * @bitflips: if bit-flips were detected when this physical eraseblock was read |
| 568 | * |
Artem Bityutskiy | 79b510c | 2007-05-05 17:36:17 +0300 | [diff] [blame] | 569 | * This function adds information about a used physical eraseblock to the |
| 570 | * 'used' tree of the corresponding volume. The function is rather complex |
| 571 | * because it has to handle cases when this is not the first physical |
| 572 | * eraseblock belonging to the same logical eraseblock, and the newer one has |
| 573 | * to be picked, while the older one has to be dropped. This function returns |
| 574 | * zero in case of success and a negative error code in case of failure. |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 575 | */ |
Artem Bityutskiy | 3561188 | 2012-05-17 15:31:31 +0300 | [diff] [blame] | 576 | int ubi_add_to_av(struct ubi_device *ubi, struct ubi_attach_info *ai, int pnum, |
| 577 | int ec, const struct ubi_vid_hdr *vid_hdr, int bitflips) |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 578 | { |
| 579 | int err, vol_id, lnum; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 580 | unsigned long long sqnum; |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 581 | struct ubi_ainf_volume *av; |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 582 | struct ubi_ainf_peb *aeb; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 583 | struct rb_node **p, *parent = NULL; |
| 584 | |
Christoph Hellwig | 3261ebd | 2007-05-21 17:41:46 +0300 | [diff] [blame] | 585 | vol_id = be32_to_cpu(vid_hdr->vol_id); |
| 586 | lnum = be32_to_cpu(vid_hdr->lnum); |
| 587 | sqnum = be64_to_cpu(vid_hdr->sqnum); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 588 | |
Artem Bityutskiy | 9869cd8 | 2008-07-18 13:53:39 +0300 | [diff] [blame] | 589 | dbg_bld("PEB %d, LEB %d:%d, EC %d, sqnum %llu, bitflips %d", |
| 590 | pnum, vol_id, lnum, ec, sqnum, bitflips); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 591 | |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 592 | av = add_volume(ai, vol_id, pnum, vid_hdr); |
| 593 | if (IS_ERR(av)) |
| 594 | return PTR_ERR(av); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 595 | |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 596 | if (ai->max_sqnum < sqnum) |
| 597 | ai->max_sqnum = sqnum; |
Brijesh Singh | 76eafe4 | 2007-07-06 14:35:43 +0300 | [diff] [blame] | 598 | |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 599 | /* |
| 600 | * Walk the RB-tree of logical eraseblocks of volume @vol_id to look |
| 601 | * if this is the first instance of this logical eraseblock or not. |
| 602 | */ |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 603 | p = &av->root.rb_node; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 604 | while (*p) { |
| 605 | int cmp_res; |
| 606 | |
| 607 | parent = *p; |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 608 | aeb = rb_entry(parent, struct ubi_ainf_peb, u.rb); |
| 609 | if (lnum != aeb->lnum) { |
| 610 | if (lnum < aeb->lnum) |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 611 | p = &(*p)->rb_left; |
| 612 | else |
| 613 | p = &(*p)->rb_right; |
| 614 | continue; |
| 615 | } |
| 616 | |
| 617 | /* |
| 618 | * There is already a physical eraseblock describing the same |
| 619 | * logical eraseblock present. |
| 620 | */ |
| 621 | |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 622 | dbg_bld("this LEB already exists: PEB %d, sqnum %llu, EC %d", |
| 623 | aeb->pnum, aeb->sqnum, aeb->ec); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 624 | |
| 625 | /* |
| 626 | * Make sure that the logical eraseblocks have different |
| 627 | * sequence numbers. Otherwise the image is bad. |
| 628 | * |
Artem Bityutskiy | 9869cd8 | 2008-07-18 13:53:39 +0300 | [diff] [blame] | 629 | * However, if the sequence number is zero, we assume it must |
| 630 | * be an ancient UBI image from the era when UBI did not have |
| 631 | * sequence numbers. We still can attach these images, unless |
| 632 | * there is a need to distinguish between old and new |
| 633 | * eraseblocks, in which case we'll refuse the image in |
Richard Weinberger | dac6e20 | 2012-09-26 17:51:47 +0200 | [diff] [blame] | 634 | * 'ubi_compare_lebs()'. In other words, we attach old clean |
Artem Bityutskiy | 9869cd8 | 2008-07-18 13:53:39 +0300 | [diff] [blame] | 635 | * images, but refuse attaching old images with duplicated |
| 636 | * logical eraseblocks because there was an unclean reboot. |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 637 | */ |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 638 | if (aeb->sqnum == sqnum && sqnum != 0) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 639 | ubi_err(ubi, "two LEBs with same sequence number %llu", |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 640 | sqnum); |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 641 | ubi_dump_aeb(aeb, 0); |
Artem Bityutskiy | a904e3f | 2012-04-25 09:02:44 +0300 | [diff] [blame] | 642 | ubi_dump_vid_hdr(vid_hdr); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 643 | return -EINVAL; |
| 644 | } |
| 645 | |
| 646 | /* |
| 647 | * Now we have to drop the older one and preserve the newer |
| 648 | * one. |
| 649 | */ |
Richard Weinberger | dac6e20 | 2012-09-26 17:51:47 +0200 | [diff] [blame] | 650 | cmp_res = ubi_compare_lebs(ubi, aeb, pnum, vid_hdr); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 651 | if (cmp_res < 0) |
| 652 | return cmp_res; |
| 653 | |
| 654 | if (cmp_res & 1) { |
| 655 | /* |
Shinya Kuribayashi | 3f50262 | 2010-05-06 19:21:47 +0900 | [diff] [blame] | 656 | * This logical eraseblock is newer than the one |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 657 | * found earlier. |
| 658 | */ |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 659 | err = validate_vid_hdr(ubi, vid_hdr, av, pnum); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 660 | if (err) |
| 661 | return err; |
| 662 | |
Joel Reardon | 6dd3bc7 | 2012-05-16 14:20:56 +0200 | [diff] [blame] | 663 | err = add_to_list(ai, aeb->pnum, aeb->vol_id, |
| 664 | aeb->lnum, aeb->ec, cmp_res & 4, |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 665 | &ai->erase); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 666 | if (err) |
| 667 | return err; |
| 668 | |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 669 | aeb->ec = ec; |
| 670 | aeb->pnum = pnum; |
Joel Reardon | 6dd3bc7 | 2012-05-16 14:20:56 +0200 | [diff] [blame] | 671 | aeb->vol_id = vol_id; |
| 672 | aeb->lnum = lnum; |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 673 | aeb->scrub = ((cmp_res & 2) || bitflips); |
| 674 | aeb->copy_flag = vid_hdr->copy_flag; |
| 675 | aeb->sqnum = sqnum; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 676 | |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 677 | if (av->highest_lnum == lnum) |
| 678 | av->last_data_size = |
Christoph Hellwig | 3261ebd | 2007-05-21 17:41:46 +0300 | [diff] [blame] | 679 | be32_to_cpu(vid_hdr->data_size); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 680 | |
| 681 | return 0; |
| 682 | } else { |
| 683 | /* |
Frederik Schwarzer | 025dfda | 2008-10-16 19:02:37 +0200 | [diff] [blame] | 684 | * This logical eraseblock is older than the one found |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 685 | * previously. |
| 686 | */ |
Joel Reardon | 6dd3bc7 | 2012-05-16 14:20:56 +0200 | [diff] [blame] | 687 | return add_to_list(ai, pnum, vol_id, lnum, ec, |
| 688 | cmp_res & 4, &ai->erase); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 689 | } |
| 690 | } |
| 691 | |
| 692 | /* |
| 693 | * We've met this logical eraseblock for the first time, add it to the |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 694 | * attaching information. |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 695 | */ |
| 696 | |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 697 | err = validate_vid_hdr(ubi, vid_hdr, av, pnum); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 698 | if (err) |
| 699 | return err; |
| 700 | |
Boris Brezillon | 91f4285 | 2016-09-16 16:59:18 +0200 | [diff] [blame] | 701 | aeb = ubi_alloc_aeb(ai, pnum, ec); |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 702 | if (!aeb) |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 703 | return -ENOMEM; |
| 704 | |
Joel Reardon | 6dd3bc7 | 2012-05-16 14:20:56 +0200 | [diff] [blame] | 705 | aeb->vol_id = vol_id; |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 706 | aeb->lnum = lnum; |
| 707 | aeb->scrub = bitflips; |
| 708 | aeb->copy_flag = vid_hdr->copy_flag; |
| 709 | aeb->sqnum = sqnum; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 710 | |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 711 | if (av->highest_lnum <= lnum) { |
| 712 | av->highest_lnum = lnum; |
| 713 | av->last_data_size = be32_to_cpu(vid_hdr->data_size); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 714 | } |
| 715 | |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 716 | av->leb_count += 1; |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 717 | rb_link_node(&aeb->u.rb, parent, p); |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 718 | rb_insert_color(&aeb->u.rb, &av->root); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 719 | return 0; |
| 720 | } |
| 721 | |
| 722 | /** |
Boris Brezillon | de4c455 | 2016-09-16 16:59:14 +0200 | [diff] [blame] | 723 | * ubi_add_av - add volume to the attaching information. |
| 724 | * @ai: attaching information |
| 725 | * @vol_id: the requested volume ID |
| 726 | * |
| 727 | * This function returns a pointer to the new volume description or an |
| 728 | * ERR_PTR if the operation failed. |
| 729 | */ |
| 730 | struct ubi_ainf_volume *ubi_add_av(struct ubi_attach_info *ai, int vol_id) |
| 731 | { |
| 732 | bool created; |
| 733 | |
| 734 | return find_or_add_av(ai, vol_id, AV_ADD, &created); |
| 735 | } |
| 736 | |
| 737 | /** |
Artem Bityutskiy | dcd85fd | 2012-05-17 15:33:20 +0300 | [diff] [blame] | 738 | * ubi_find_av - find volume in the attaching information. |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 739 | * @ai: attaching information |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 740 | * @vol_id: the requested volume ID |
| 741 | * |
| 742 | * This function returns a pointer to the volume description or %NULL if there |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 743 | * are no data about this volume in the attaching information. |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 744 | */ |
Artem Bityutskiy | dcd85fd | 2012-05-17 15:33:20 +0300 | [diff] [blame] | 745 | struct ubi_ainf_volume *ubi_find_av(const struct ubi_attach_info *ai, |
| 746 | int vol_id) |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 747 | { |
Boris Brezillon | de4c455 | 2016-09-16 16:59:14 +0200 | [diff] [blame] | 748 | bool created; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 749 | |
Boris Brezillon | de4c455 | 2016-09-16 16:59:14 +0200 | [diff] [blame] | 750 | return find_or_add_av((struct ubi_attach_info *)ai, vol_id, AV_FIND, |
| 751 | &created); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 752 | } |
| 753 | |
Boris Brezillon | f9efe8d | 2016-09-16 16:59:15 +0200 | [diff] [blame] | 754 | static void destroy_av(struct ubi_attach_info *ai, struct ubi_ainf_volume *av, |
| 755 | struct list_head *list); |
| 756 | |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 757 | /** |
Artem Bityutskiy | d717dc2 | 2012-05-17 15:36:39 +0300 | [diff] [blame] | 758 | * ubi_remove_av - delete attaching information about a volume. |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 759 | * @ai: attaching information |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 760 | * @av: the volume attaching information to delete |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 761 | */ |
Artem Bityutskiy | d717dc2 | 2012-05-17 15:36:39 +0300 | [diff] [blame] | 762 | void ubi_remove_av(struct ubi_attach_info *ai, struct ubi_ainf_volume *av) |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 763 | { |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 764 | dbg_bld("remove attaching information about volume %d", av->vol_id); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 765 | |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 766 | rb_erase(&av->rb, &ai->volumes); |
Boris Brezillon | f9efe8d | 2016-09-16 16:59:15 +0200 | [diff] [blame] | 767 | destroy_av(ai, av, &ai->erase); |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 768 | ai->vols_found -= 1; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 769 | } |
| 770 | |
| 771 | /** |
Artem Bityutskiy | 13d33da | 2012-05-17 15:20:28 +0300 | [diff] [blame] | 772 | * early_erase_peb - erase a physical eraseblock. |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 773 | * @ubi: UBI device description object |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 774 | * @ai: attaching information |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 775 | * @pnum: physical eraseblock number to erase; |
Artem Bityutskiy | 9c47fb2 | 2012-05-18 12:54:58 +0300 | [diff] [blame] | 776 | * @ec: erase counter value to write (%UBI_UNKNOWN if it is unknown) |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 777 | * |
| 778 | * This function erases physical eraseblock 'pnum', and writes the erase |
| 779 | * counter header to it. This function should only be used on UBI device |
Artem Bityutskiy | 85c6e6e | 2008-07-16 10:25:56 +0300 | [diff] [blame] | 780 | * initialization stages, when the EBA sub-system had not been yet initialized. |
| 781 | * This function returns zero in case of success and a negative error code in |
| 782 | * case of failure. |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 783 | */ |
Artem Bityutskiy | 13d33da | 2012-05-17 15:20:28 +0300 | [diff] [blame] | 784 | static int early_erase_peb(struct ubi_device *ubi, |
| 785 | const struct ubi_attach_info *ai, int pnum, int ec) |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 786 | { |
| 787 | int err; |
| 788 | struct ubi_ec_hdr *ec_hdr; |
| 789 | |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 790 | if ((long long)ec >= UBI_MAX_ERASECOUNTER) { |
| 791 | /* |
| 792 | * Erase counter overflow. Upgrade UBI and use 64-bit |
| 793 | * erase counters internally. |
| 794 | */ |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 795 | ubi_err(ubi, "erase counter overflow at PEB %d, EC %d", |
| 796 | pnum, ec); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 797 | return -EINVAL; |
| 798 | } |
| 799 | |
Florin Malita | dcec4c3 | 2007-07-19 15:22:41 -0400 | [diff] [blame] | 800 | ec_hdr = kzalloc(ubi->ec_hdr_alsize, GFP_KERNEL); |
| 801 | if (!ec_hdr) |
| 802 | return -ENOMEM; |
| 803 | |
Christoph Hellwig | 3261ebd | 2007-05-21 17:41:46 +0300 | [diff] [blame] | 804 | ec_hdr->ec = cpu_to_be64(ec); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 805 | |
| 806 | err = ubi_io_sync_erase(ubi, pnum, 0); |
| 807 | if (err < 0) |
| 808 | goto out_free; |
| 809 | |
| 810 | err = ubi_io_write_ec_hdr(ubi, pnum, ec_hdr); |
| 811 | |
| 812 | out_free: |
| 813 | kfree(ec_hdr); |
| 814 | return err; |
| 815 | } |
| 816 | |
| 817 | /** |
Artem Bityutskiy | c87fbd7 | 2012-05-17 15:38:56 +0300 | [diff] [blame] | 818 | * ubi_early_get_peb - get a free physical eraseblock. |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 819 | * @ubi: UBI device description object |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 820 | * @ai: attaching information |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 821 | * |
| 822 | * This function returns a free physical eraseblock. It is supposed to be |
Artem Bityutskiy | 85c6e6e | 2008-07-16 10:25:56 +0300 | [diff] [blame] | 823 | * called on the UBI initialization stages when the wear-leveling sub-system is |
| 824 | * not initialized yet. This function picks a physical eraseblocks from one of |
| 825 | * the lists, writes the EC header if it is needed, and removes it from the |
| 826 | * list. |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 827 | * |
Artem Bityutskiy | fbd0107 | 2012-05-17 16:12:26 +0300 | [diff] [blame] | 828 | * This function returns a pointer to the "aeb" of the found free PEB in case |
| 829 | * of success and an error code in case of failure. |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 830 | */ |
Artem Bityutskiy | c87fbd7 | 2012-05-17 15:38:56 +0300 | [diff] [blame] | 831 | struct ubi_ainf_peb *ubi_early_get_peb(struct ubi_device *ubi, |
| 832 | struct ubi_attach_info *ai) |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 833 | { |
Artem Bityutskiy | 5fc01ab | 2010-09-03 23:08:15 +0300 | [diff] [blame] | 834 | int err = 0; |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 835 | struct ubi_ainf_peb *aeb, *tmp_aeb; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 836 | |
Nikhilesh Reddy | 547808b | 2015-09-24 16:32:56 -0700 | [diff] [blame] | 837 | list_for_each_entry_safe(aeb, tmp_aeb, &ai->free, u.list) { |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 838 | list_del(&aeb->u.list); |
Nikhilesh Reddy | 547808b | 2015-09-24 16:32:56 -0700 | [diff] [blame] | 839 | if (aeb->ec == UBI_UNKNOWN) { |
| 840 | ubi_err(ubi, "PEB %d in freelist has unknown EC", |
| 841 | aeb->pnum); |
| 842 | aeb->ec = ai->mean_ec; |
| 843 | } |
| 844 | err = early_erase_peb(ubi, ai, aeb->pnum, aeb->ec+1); |
| 845 | if (err) { |
| 846 | ubi_err(ubi, "Erase failed for PEB %d in freelist", |
| 847 | aeb->pnum); |
| 848 | list_add(&aeb->u.list, &ai->erase); |
| 849 | continue; |
| 850 | } |
| 851 | aeb->ec += 1; |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 852 | dbg_bld("return free PEB %d, EC %d", aeb->pnum, aeb->ec); |
| 853 | return aeb; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 854 | } |
| 855 | |
Artem Bityutskiy | 5fc01ab | 2010-09-03 23:08:15 +0300 | [diff] [blame] | 856 | /* |
| 857 | * We try to erase the first physical eraseblock from the erase list |
| 858 | * and pick it if we succeed, or try to erase the next one if not. And |
| 859 | * so forth. We don't want to take care about bad eraseblocks here - |
| 860 | * they'll be handled later. |
| 861 | */ |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 862 | list_for_each_entry_safe(aeb, tmp_aeb, &ai->erase, u.list) { |
Artem Bityutskiy | 9c47fb2 | 2012-05-18 12:54:58 +0300 | [diff] [blame] | 863 | if (aeb->ec == UBI_UNKNOWN) |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 864 | aeb->ec = ai->mean_ec; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 865 | |
Artem Bityutskiy | 13d33da | 2012-05-17 15:20:28 +0300 | [diff] [blame] | 866 | err = early_erase_peb(ubi, ai, aeb->pnum, aeb->ec+1); |
Artem Bityutskiy | 5fc01ab | 2010-09-03 23:08:15 +0300 | [diff] [blame] | 867 | if (err) |
| 868 | continue; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 869 | |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 870 | aeb->ec += 1; |
| 871 | list_del(&aeb->u.list); |
| 872 | dbg_bld("return PEB %d, EC %d", aeb->pnum, aeb->ec); |
| 873 | return aeb; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 874 | } |
| 875 | |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 876 | ubi_err(ubi, "no free eraseblocks"); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 877 | return ERR_PTR(-ENOSPC); |
| 878 | } |
| 879 | |
| 880 | /** |
Artem Bityutskiy | 45aafd3 | 2010-10-20 11:54:58 +0300 | [diff] [blame] | 881 | * check_corruption - check the data area of PEB. |
Artem Bityutskiy | feeba4b | 2010-09-03 22:50:53 +0300 | [diff] [blame] | 882 | * @ubi: UBI device description object |
Richard Weinberger | dac6e20 | 2012-09-26 17:51:47 +0200 | [diff] [blame] | 883 | * @vid_hdr: the (corrupted) VID header of this PEB |
Artem Bityutskiy | feeba4b | 2010-09-03 22:50:53 +0300 | [diff] [blame] | 884 | * @pnum: the physical eraseblock number to check |
| 885 | * |
| 886 | * This is a helper function which is used to distinguish between VID header |
| 887 | * corruptions caused by power cuts and other reasons. If the PEB contains only |
Artem Bityutskiy | 45aafd3 | 2010-10-20 11:54:58 +0300 | [diff] [blame] | 888 | * 0xFF bytes in the data area, the VID header is most probably corrupted |
Artem Bityutskiy | feeba4b | 2010-09-03 22:50:53 +0300 | [diff] [blame] | 889 | * because of a power cut (%0 is returned in this case). Otherwise, it was |
Artem Bityutskiy | 45aafd3 | 2010-10-20 11:54:58 +0300 | [diff] [blame] | 890 | * probably corrupted for some other reasons (%1 is returned in this case). A |
| 891 | * negative error code is returned if a read error occurred. |
Artem Bityutskiy | feeba4b | 2010-09-03 22:50:53 +0300 | [diff] [blame] | 892 | * |
| 893 | * If the corruption reason was a power cut, UBI can safely erase this PEB. |
| 894 | * Otherwise, it should preserve it to avoid possibly destroying important |
| 895 | * information. |
| 896 | */ |
Artem Bityutskiy | 45aafd3 | 2010-10-20 11:54:58 +0300 | [diff] [blame] | 897 | static int check_corruption(struct ubi_device *ubi, struct ubi_vid_hdr *vid_hdr, |
| 898 | int pnum) |
Artem Bityutskiy | feeba4b | 2010-09-03 22:50:53 +0300 | [diff] [blame] | 899 | { |
| 900 | int err; |
| 901 | |
| 902 | mutex_lock(&ubi->buf_mutex); |
Artem Bityutskiy | 0ca39d7 | 2012-03-08 15:29:37 +0200 | [diff] [blame] | 903 | memset(ubi->peb_buf, 0x00, ubi->leb_size); |
Artem Bityutskiy | feeba4b | 2010-09-03 22:50:53 +0300 | [diff] [blame] | 904 | |
Artem Bityutskiy | 0ca39d7 | 2012-03-08 15:29:37 +0200 | [diff] [blame] | 905 | err = ubi_io_read(ubi, ubi->peb_buf, pnum, ubi->leb_start, |
Artem Bityutskiy | feeba4b | 2010-09-03 22:50:53 +0300 | [diff] [blame] | 906 | ubi->leb_size); |
Brian Norris | d57f4054 | 2011-09-20 18:34:25 -0700 | [diff] [blame] | 907 | if (err == UBI_IO_BITFLIPS || mtd_is_eccerr(err)) { |
Artem Bityutskiy | 45aafd3 | 2010-10-20 11:54:58 +0300 | [diff] [blame] | 908 | /* |
| 909 | * Bit-flips or integrity errors while reading the data area. |
| 910 | * It is difficult to say for sure what type of corruption is |
| 911 | * this, but presumably a power cut happened while this PEB was |
| 912 | * erased, so it became unstable and corrupted, and should be |
| 913 | * erased. |
| 914 | */ |
Dan Carpenter | 1b1d76e | 2010-11-18 06:58:04 +0300 | [diff] [blame] | 915 | err = 0; |
| 916 | goto out_unlock; |
Artem Bityutskiy | 45aafd3 | 2010-10-20 11:54:58 +0300 | [diff] [blame] | 917 | } |
| 918 | |
| 919 | if (err) |
Dan Carpenter | 1b1d76e | 2010-11-18 06:58:04 +0300 | [diff] [blame] | 920 | goto out_unlock; |
Artem Bityutskiy | feeba4b | 2010-09-03 22:50:53 +0300 | [diff] [blame] | 921 | |
Artem Bityutskiy | 0ca39d7 | 2012-03-08 15:29:37 +0200 | [diff] [blame] | 922 | if (ubi_check_pattern(ubi->peb_buf, 0xFF, ubi->leb_size)) |
Dan Carpenter | 1b1d76e | 2010-11-18 06:58:04 +0300 | [diff] [blame] | 923 | goto out_unlock; |
Artem Bityutskiy | feeba4b | 2010-09-03 22:50:53 +0300 | [diff] [blame] | 924 | |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 925 | ubi_err(ubi, "PEB %d contains corrupted VID header, and the data does not contain all 0xFF", |
Artem Bityutskiy | 049333c | 2012-08-27 14:43:54 +0300 | [diff] [blame] | 926 | pnum); |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 927 | ubi_err(ubi, "this may be a non-UBI PEB or a severe VID header corruption which requires manual inspection"); |
Artem Bityutskiy | a904e3f | 2012-04-25 09:02:44 +0300 | [diff] [blame] | 928 | ubi_dump_vid_hdr(vid_hdr); |
Artem Bityutskiy | 719bb84 | 2012-08-27 17:14:58 +0300 | [diff] [blame] | 929 | pr_err("hexdump of PEB %d offset %d, length %d", |
| 930 | pnum, ubi->leb_start, ubi->leb_size); |
Artem Bityutskiy | feeba4b | 2010-09-03 22:50:53 +0300 | [diff] [blame] | 931 | ubi_dbg_print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1, |
Artem Bityutskiy | 0ca39d7 | 2012-03-08 15:29:37 +0200 | [diff] [blame] | 932 | ubi->peb_buf, ubi->leb_size, 1); |
Dan Carpenter | 1b1d76e | 2010-11-18 06:58:04 +0300 | [diff] [blame] | 933 | err = 1; |
| 934 | |
| 935 | out_unlock: |
Artem Bityutskiy | feeba4b | 2010-09-03 22:50:53 +0300 | [diff] [blame] | 936 | mutex_unlock(&ubi->buf_mutex); |
Dan Carpenter | 1b1d76e | 2010-11-18 06:58:04 +0300 | [diff] [blame] | 937 | return err; |
Artem Bityutskiy | feeba4b | 2010-09-03 22:50:53 +0300 | [diff] [blame] | 938 | } |
| 939 | |
Richard Weinberger | 243a4f8 | 2016-06-14 10:12:13 +0200 | [diff] [blame] | 940 | static bool vol_ignored(int vol_id) |
| 941 | { |
| 942 | switch (vol_id) { |
| 943 | case UBI_LAYOUT_VOLUME_ID: |
| 944 | return true; |
| 945 | } |
| 946 | |
| 947 | #ifdef CONFIG_MTD_UBI_FASTMAP |
| 948 | return ubi_is_fm_vol(vol_id); |
| 949 | #else |
| 950 | return false; |
| 951 | #endif |
| 952 | } |
| 953 | |
Artem Bityutskiy | feeba4b | 2010-09-03 22:50:53 +0300 | [diff] [blame] | 954 | /** |
Artem Bityutskiy | fbd0107 | 2012-05-17 16:12:26 +0300 | [diff] [blame] | 955 | * scan_peb - scan and process UBI headers of a PEB. |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 956 | * @ubi: UBI device description object |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 957 | * @ai: attaching information |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 958 | * @pnum: the physical eraseblock number |
Richard Weinberger | 74f2c6e | 2016-06-14 10:12:17 +0200 | [diff] [blame] | 959 | * @fast: true if we're scanning for a Fastmap |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 960 | * |
Artem Bityutskiy | fbd0107 | 2012-05-17 16:12:26 +0300 | [diff] [blame] | 961 | * This function reads UBI headers of PEB @pnum, checks them, and adds |
| 962 | * information about this PEB to the corresponding list or RB-tree in the |
| 963 | * "attaching info" structure. Returns zero if the physical eraseblock was |
| 964 | * successfully handled and a negative error code in case of failure. |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 965 | */ |
Richard Weinberger | 74f2c6e | 2016-06-14 10:12:17 +0200 | [diff] [blame] | 966 | static int scan_peb(struct ubi_device *ubi, struct ubi_attach_info *ai, |
| 967 | int pnum, bool fast) |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 968 | { |
Boris Brezillon | 7b6b749 | 2016-09-16 16:59:19 +0200 | [diff] [blame] | 969 | struct ubi_ec_hdr *ech = ai->ech; |
Boris Brezillon | 3291b52 | 2016-09-16 16:59:26 +0200 | [diff] [blame] | 970 | struct ubi_vid_io_buf *vidb = ai->vidb; |
| 971 | struct ubi_vid_hdr *vidh = ubi_get_vid_hdr(vidb); |
Richard Weinberger | fdf10ed | 2016-06-14 10:12:15 +0200 | [diff] [blame] | 972 | long long ec; |
Richard Weinberger | dac6e20 | 2012-09-26 17:51:47 +0200 | [diff] [blame] | 973 | int err, bitflips = 0, vol_id = -1, ec_err = 0; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 974 | |
| 975 | dbg_bld("scan PEB %d", pnum); |
| 976 | |
| 977 | /* Skip bad physical eraseblocks */ |
| 978 | err = ubi_io_is_bad(ubi, pnum); |
| 979 | if (err < 0) |
| 980 | return err; |
| 981 | else if (err) { |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 982 | ai->bad_peb_count += 1; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 983 | return 0; |
| 984 | } |
| 985 | |
| 986 | err = ubi_io_read_ec_hdr(ubi, pnum, ech, 0); |
| 987 | if (err < 0) |
| 988 | return err; |
Artem Bityutskiy | b332150 | 2010-09-03 14:40:55 +0300 | [diff] [blame] | 989 | switch (err) { |
| 990 | case 0: |
| 991 | break; |
| 992 | case UBI_IO_BITFLIPS: |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 993 | bitflips = 1; |
Artem Bityutskiy | b332150 | 2010-09-03 14:40:55 +0300 | [diff] [blame] | 994 | break; |
| 995 | case UBI_IO_FF: |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 996 | ai->empty_peb_count += 1; |
Joel Reardon | 6dd3bc7 | 2012-05-16 14:20:56 +0200 | [diff] [blame] | 997 | return add_to_list(ai, pnum, UBI_UNKNOWN, UBI_UNKNOWN, |
| 998 | UBI_UNKNOWN, 0, &ai->erase); |
Artem Bityutskiy | b332150 | 2010-09-03 14:40:55 +0300 | [diff] [blame] | 999 | case UBI_IO_FF_BITFLIPS: |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 1000 | ai->empty_peb_count += 1; |
Joel Reardon | 6dd3bc7 | 2012-05-16 14:20:56 +0200 | [diff] [blame] | 1001 | return add_to_list(ai, pnum, UBI_UNKNOWN, UBI_UNKNOWN, |
| 1002 | UBI_UNKNOWN, 1, &ai->erase); |
Artem Bityutskiy | b332150 | 2010-09-03 14:40:55 +0300 | [diff] [blame] | 1003 | case UBI_IO_BAD_HDR_EBADMSG: |
Artem Bityutskiy | b332150 | 2010-09-03 14:40:55 +0300 | [diff] [blame] | 1004 | case UBI_IO_BAD_HDR: |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1005 | /* |
| 1006 | * We have to also look at the VID header, possibly it is not |
| 1007 | * corrupted. Set %bitflips flag in order to make this PEB be |
| 1008 | * moved and EC be re-created. |
| 1009 | */ |
Artem Bityutskiy | e0e718c | 2010-09-03 14:53:23 +0300 | [diff] [blame] | 1010 | ec_err = err; |
Artem Bityutskiy | 9c47fb2 | 2012-05-18 12:54:58 +0300 | [diff] [blame] | 1011 | ec = UBI_UNKNOWN; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1012 | bitflips = 1; |
Artem Bityutskiy | b332150 | 2010-09-03 14:40:55 +0300 | [diff] [blame] | 1013 | break; |
| 1014 | default: |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1015 | ubi_err(ubi, "'ubi_io_read_ec_hdr()' returned unknown code %d", |
| 1016 | err); |
Artem Bityutskiy | b332150 | 2010-09-03 14:40:55 +0300 | [diff] [blame] | 1017 | return -EINVAL; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1018 | } |
| 1019 | |
Artem Bityutskiy | e0e718c | 2010-09-03 14:53:23 +0300 | [diff] [blame] | 1020 | if (!ec_err) { |
Artem Bityutskiy | fe96efc | 2009-06-30 16:11:59 +0300 | [diff] [blame] | 1021 | int image_seq; |
| 1022 | |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1023 | /* Make sure UBI version is OK */ |
| 1024 | if (ech->version != UBI_VERSION) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1025 | ubi_err(ubi, "this UBI version is %d, image version is %d", |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1026 | UBI_VERSION, (int)ech->version); |
| 1027 | return -EINVAL; |
| 1028 | } |
| 1029 | |
Christoph Hellwig | 3261ebd | 2007-05-21 17:41:46 +0300 | [diff] [blame] | 1030 | ec = be64_to_cpu(ech->ec); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1031 | if (ec > UBI_MAX_ERASECOUNTER) { |
| 1032 | /* |
| 1033 | * Erase counter overflow. The EC headers have 64 bits |
| 1034 | * reserved, but we anyway make use of only 31 bit |
| 1035 | * values, as this seems to be enough for any existing |
| 1036 | * flash. Upgrade UBI and use 64-bit erase counters |
| 1037 | * internally. |
| 1038 | */ |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1039 | ubi_err(ubi, "erase counter overflow, max is %d", |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1040 | UBI_MAX_ERASECOUNTER); |
Artem Bityutskiy | a904e3f | 2012-04-25 09:02:44 +0300 | [diff] [blame] | 1041 | ubi_dump_ec_hdr(ech); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1042 | return -EINVAL; |
| 1043 | } |
Artem Bityutskiy | fe96efc | 2009-06-30 16:11:59 +0300 | [diff] [blame] | 1044 | |
Adrian Hunter | 32bc482 | 2009-07-24 19:16:04 +0300 | [diff] [blame] | 1045 | /* |
| 1046 | * Make sure that all PEBs have the same image sequence number. |
| 1047 | * This allows us to detect situations when users flash UBI |
| 1048 | * images incorrectly, so that the flash has the new UBI image |
| 1049 | * and leftovers from the old one. This feature was added |
| 1050 | * relatively recently, and the sequence number was always |
| 1051 | * zero, because old UBI implementations always set it to zero. |
| 1052 | * For this reasons, we do not panic if some PEBs have zero |
| 1053 | * sequence number, while other PEBs have non-zero sequence |
| 1054 | * number. |
| 1055 | */ |
Holger Brunck | 3dc948d | 2009-07-13 16:47:57 +0200 | [diff] [blame] | 1056 | image_seq = be32_to_cpu(ech->image_seq); |
Richard Genoud | 55b80c4 | 2013-09-28 15:55:14 +0200 | [diff] [blame] | 1057 | if (!ubi->image_seq) |
Artem Bityutskiy | fe96efc | 2009-06-30 16:11:59 +0300 | [diff] [blame] | 1058 | ubi->image_seq = image_seq; |
Richard Genoud | 55b80c4 | 2013-09-28 15:55:14 +0200 | [diff] [blame] | 1059 | if (image_seq && ubi->image_seq != image_seq) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1060 | ubi_err(ubi, "bad image sequence number %d in PEB %d, expected %d", |
Artem Bityutskiy | 049333c | 2012-08-27 14:43:54 +0300 | [diff] [blame] | 1061 | image_seq, pnum, ubi->image_seq); |
Artem Bityutskiy | a904e3f | 2012-04-25 09:02:44 +0300 | [diff] [blame] | 1062 | ubi_dump_ec_hdr(ech); |
Artem Bityutskiy | fe96efc | 2009-06-30 16:11:59 +0300 | [diff] [blame] | 1063 | return -EINVAL; |
| 1064 | } |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1065 | } |
| 1066 | |
| 1067 | /* OK, we've done with the EC header, let's look at the VID header */ |
| 1068 | |
Boris Brezillon | 3291b52 | 2016-09-16 16:59:26 +0200 | [diff] [blame] | 1069 | err = ubi_io_read_vid_hdr(ubi, pnum, vidb, 0); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1070 | if (err < 0) |
| 1071 | return err; |
Artem Bityutskiy | b332150 | 2010-09-03 14:40:55 +0300 | [diff] [blame] | 1072 | switch (err) { |
| 1073 | case 0: |
| 1074 | break; |
| 1075 | case UBI_IO_BITFLIPS: |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1076 | bitflips = 1; |
Artem Bityutskiy | b332150 | 2010-09-03 14:40:55 +0300 | [diff] [blame] | 1077 | break; |
| 1078 | case UBI_IO_BAD_HDR_EBADMSG: |
Artem Bityutskiy | 0525dac | 2010-09-03 17:11:37 +0300 | [diff] [blame] | 1079 | if (ec_err == UBI_IO_BAD_HDR_EBADMSG) |
| 1080 | /* |
| 1081 | * Both EC and VID headers are corrupted and were read |
| 1082 | * with data integrity error, probably this is a bad |
| 1083 | * PEB, bit it is not marked as bad yet. This may also |
| 1084 | * be a result of power cut during erasure. |
| 1085 | */ |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 1086 | ai->maybe_bad_peb_count += 1; |
Artem Bityutskiy | b332150 | 2010-09-03 14:40:55 +0300 | [diff] [blame] | 1087 | case UBI_IO_BAD_HDR: |
Richard Weinberger | 74f2c6e | 2016-06-14 10:12:17 +0200 | [diff] [blame] | 1088 | /* |
| 1089 | * If we're facing a bad VID header we have to drop *all* |
| 1090 | * Fastmap data structures we find. The most recent Fastmap |
| 1091 | * could be bad and therefore there is a chance that we attach |
| 1092 | * from an old one. On a fine MTD stack a PEB must not render |
| 1093 | * bad all of a sudden, but the reality is different. |
| 1094 | * So, let's be paranoid and help finding the root cause by |
| 1095 | * falling back to scanning mode instead of attaching with a |
| 1096 | * bad EBA table and cause data corruption which is hard to |
| 1097 | * analyze. |
| 1098 | */ |
| 1099 | if (fast) |
| 1100 | ai->force_full_scan = 1; |
| 1101 | |
Artem Bityutskiy | feeba4b | 2010-09-03 22:50:53 +0300 | [diff] [blame] | 1102 | if (ec_err) |
| 1103 | /* |
| 1104 | * Both headers are corrupted. There is a possibility |
| 1105 | * that this a valid UBI PEB which has corresponding |
| 1106 | * LEB, but the headers are corrupted. However, it is |
| 1107 | * impossible to distinguish it from a PEB which just |
Artem Bityutskiy | 45aafd3 | 2010-10-20 11:54:58 +0300 | [diff] [blame] | 1108 | * contains garbage because of a power cut during erase |
Artem Bityutskiy | feeba4b | 2010-09-03 22:50:53 +0300 | [diff] [blame] | 1109 | * operation. So we just schedule this PEB for erasure. |
Artem Bityutskiy | 7ac760c | 2010-12-02 06:34:01 +0200 | [diff] [blame] | 1110 | * |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1111 | * Besides, in case of NOR flash, we deliberately |
Artem Bityutskiy | 7ac760c | 2010-12-02 06:34:01 +0200 | [diff] [blame] | 1112 | * corrupt both headers because NOR flash erasure is |
| 1113 | * slow and can start from the end. |
Artem Bityutskiy | feeba4b | 2010-09-03 22:50:53 +0300 | [diff] [blame] | 1114 | */ |
| 1115 | err = 0; |
| 1116 | else |
| 1117 | /* |
| 1118 | * The EC was OK, but the VID header is corrupted. We |
| 1119 | * have to check what is in the data area. |
| 1120 | */ |
Artem Bityutskiy | 45aafd3 | 2010-10-20 11:54:58 +0300 | [diff] [blame] | 1121 | err = check_corruption(ubi, vidh, pnum); |
Artem Bityutskiy | df3fca4 | 2010-10-20 11:51:21 +0300 | [diff] [blame] | 1122 | |
| 1123 | if (err < 0) |
| 1124 | return err; |
| 1125 | else if (!err) |
Artem Bityutskiy | feeba4b | 2010-09-03 22:50:53 +0300 | [diff] [blame] | 1126 | /* This corruption is caused by a power cut */ |
Joel Reardon | 6dd3bc7 | 2012-05-16 14:20:56 +0200 | [diff] [blame] | 1127 | err = add_to_list(ai, pnum, UBI_UNKNOWN, |
| 1128 | UBI_UNKNOWN, ec, 1, &ai->erase); |
Artem Bityutskiy | feeba4b | 2010-09-03 22:50:53 +0300 | [diff] [blame] | 1129 | else |
| 1130 | /* This is an unexpected corruption */ |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 1131 | err = add_corrupted(ai, pnum, ec); |
Artem Bityutskiy | feeba4b | 2010-09-03 22:50:53 +0300 | [diff] [blame] | 1132 | if (err) |
| 1133 | return err; |
| 1134 | goto adjust_mean_ec; |
Artem Bityutskiy | b332150 | 2010-09-03 14:40:55 +0300 | [diff] [blame] | 1135 | case UBI_IO_FF_BITFLIPS: |
Joel Reardon | 6dd3bc7 | 2012-05-16 14:20:56 +0200 | [diff] [blame] | 1136 | err = add_to_list(ai, pnum, UBI_UNKNOWN, UBI_UNKNOWN, |
| 1137 | ec, 1, &ai->erase); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1138 | if (err) |
| 1139 | return err; |
| 1140 | goto adjust_mean_ec; |
Artem Bityutskiy | b332150 | 2010-09-03 14:40:55 +0300 | [diff] [blame] | 1141 | case UBI_IO_FF: |
Matthieu CASTET | 193819c | 2012-08-22 16:03:46 +0200 | [diff] [blame] | 1142 | if (ec_err || bitflips) |
Joel Reardon | 6dd3bc7 | 2012-05-16 14:20:56 +0200 | [diff] [blame] | 1143 | err = add_to_list(ai, pnum, UBI_UNKNOWN, |
| 1144 | UBI_UNKNOWN, ec, 1, &ai->erase); |
Artem Bityutskiy | b332150 | 2010-09-03 14:40:55 +0300 | [diff] [blame] | 1145 | else |
Joel Reardon | 6dd3bc7 | 2012-05-16 14:20:56 +0200 | [diff] [blame] | 1146 | err = add_to_list(ai, pnum, UBI_UNKNOWN, |
| 1147 | UBI_UNKNOWN, ec, 0, &ai->free); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1148 | if (err) |
| 1149 | return err; |
| 1150 | goto adjust_mean_ec; |
Artem Bityutskiy | b332150 | 2010-09-03 14:40:55 +0300 | [diff] [blame] | 1151 | default: |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1152 | ubi_err(ubi, "'ubi_io_read_vid_hdr()' returned unknown code %d", |
Artem Bityutskiy | b332150 | 2010-09-03 14:40:55 +0300 | [diff] [blame] | 1153 | err); |
| 1154 | return -EINVAL; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1155 | } |
| 1156 | |
Christoph Hellwig | 3261ebd | 2007-05-21 17:41:46 +0300 | [diff] [blame] | 1157 | vol_id = be32_to_cpu(vidh->vol_id); |
Richard Weinberger | 243a4f8 | 2016-06-14 10:12:13 +0200 | [diff] [blame] | 1158 | if (vol_id > UBI_MAX_VOLUMES && !vol_ignored(vol_id)) { |
Christoph Hellwig | 3261ebd | 2007-05-21 17:41:46 +0300 | [diff] [blame] | 1159 | int lnum = be32_to_cpu(vidh->lnum); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1160 | |
| 1161 | /* Unsupported internal volume */ |
| 1162 | switch (vidh->compat) { |
| 1163 | case UBI_COMPAT_DELETE: |
Richard Weinberger | 243a4f8 | 2016-06-14 10:12:13 +0200 | [diff] [blame] | 1164 | ubi_msg(ubi, "\"delete\" compatible internal volume %d:%d found, will remove it", |
| 1165 | vol_id, lnum); |
| 1166 | |
Joel Reardon | 6dd3bc7 | 2012-05-16 14:20:56 +0200 | [diff] [blame] | 1167 | err = add_to_list(ai, pnum, vol_id, lnum, |
| 1168 | ec, 1, &ai->erase); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1169 | if (err) |
| 1170 | return err; |
Brijesh Singh | 158132c | 2010-06-16 09:28:26 +0300 | [diff] [blame] | 1171 | return 0; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1172 | |
| 1173 | case UBI_COMPAT_RO: |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1174 | ubi_msg(ubi, "read-only compatible internal volume %d:%d found, switch to read-only mode", |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1175 | vol_id, lnum); |
| 1176 | ubi->ro_mode = 1; |
| 1177 | break; |
| 1178 | |
| 1179 | case UBI_COMPAT_PRESERVE: |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1180 | ubi_msg(ubi, "\"preserve\" compatible internal volume %d:%d found", |
Artem Bityutskiy | 049333c | 2012-08-27 14:43:54 +0300 | [diff] [blame] | 1181 | vol_id, lnum); |
Joel Reardon | 6dd3bc7 | 2012-05-16 14:20:56 +0200 | [diff] [blame] | 1182 | err = add_to_list(ai, pnum, vol_id, lnum, |
| 1183 | ec, 0, &ai->alien); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1184 | if (err) |
| 1185 | return err; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1186 | return 0; |
| 1187 | |
| 1188 | case UBI_COMPAT_REJECT: |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1189 | ubi_err(ubi, "incompatible internal volume %d:%d found", |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1190 | vol_id, lnum); |
| 1191 | return -EINVAL; |
| 1192 | } |
| 1193 | } |
| 1194 | |
Artem Bityutskiy | e0e718c | 2010-09-03 14:53:23 +0300 | [diff] [blame] | 1195 | if (ec_err) |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1196 | ubi_warn(ubi, "valid VID header but corrupted EC header at PEB %d", |
Artem Bityutskiy | 29a88c9 | 2009-07-19 14:03:16 +0300 | [diff] [blame] | 1197 | pnum); |
Richard Weinberger | fdf10ed | 2016-06-14 10:12:15 +0200 | [diff] [blame] | 1198 | |
| 1199 | if (ubi_is_fm_vol(vol_id)) |
| 1200 | err = add_fastmap(ai, pnum, vidh, ec); |
| 1201 | else |
| 1202 | err = ubi_add_to_av(ubi, ai, pnum, ec, vidh, bitflips); |
| 1203 | |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1204 | if (err) |
| 1205 | return err; |
| 1206 | |
| 1207 | adjust_mean_ec: |
Artem Bityutskiy | e0e718c | 2010-09-03 14:53:23 +0300 | [diff] [blame] | 1208 | if (!ec_err) { |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 1209 | ai->ec_sum += ec; |
| 1210 | ai->ec_count += 1; |
| 1211 | if (ec > ai->max_ec) |
| 1212 | ai->max_ec = ec; |
| 1213 | if (ec < ai->min_ec) |
| 1214 | ai->min_ec = ec; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1215 | } |
| 1216 | |
| 1217 | return 0; |
| 1218 | } |
| 1219 | |
| 1220 | /** |
Artem Bityutskiy | fbd0107 | 2012-05-17 16:12:26 +0300 | [diff] [blame] | 1221 | * late_analysis - analyze the overall situation with PEB. |
Artem Bityutskiy | 0798cea | 2010-04-30 13:02:33 +0300 | [diff] [blame] | 1222 | * @ubi: UBI device description object |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 1223 | * @ai: attaching information |
Artem Bityutskiy | 0798cea | 2010-04-30 13:02:33 +0300 | [diff] [blame] | 1224 | * |
Artem Bityutskiy | fbd0107 | 2012-05-17 16:12:26 +0300 | [diff] [blame] | 1225 | * This is a helper function which takes a look what PEBs we have after we |
| 1226 | * gather information about all of them ("ai" is compete). It decides whether |
| 1227 | * the flash is empty and should be formatted of whether there are too many |
| 1228 | * corrupted PEBs and we should not attach this MTD device. Returns zero if we |
| 1229 | * should proceed with attaching the MTD device, and %-EINVAL if we should not. |
Artem Bityutskiy | 0798cea | 2010-04-30 13:02:33 +0300 | [diff] [blame] | 1230 | */ |
Artem Bityutskiy | fbd0107 | 2012-05-17 16:12:26 +0300 | [diff] [blame] | 1231 | static int late_analysis(struct ubi_device *ubi, struct ubi_attach_info *ai) |
Artem Bityutskiy | 0798cea | 2010-04-30 13:02:33 +0300 | [diff] [blame] | 1232 | { |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 1233 | struct ubi_ainf_peb *aeb; |
Artem Bityutskiy | 0525dac | 2010-09-03 17:11:37 +0300 | [diff] [blame] | 1234 | int max_corr, peb_count; |
Artem Bityutskiy | 0798cea | 2010-04-30 13:02:33 +0300 | [diff] [blame] | 1235 | |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 1236 | peb_count = ubi->peb_count - ai->bad_peb_count - ai->alien_peb_count; |
Artem Bityutskiy | 0525dac | 2010-09-03 17:11:37 +0300 | [diff] [blame] | 1237 | max_corr = peb_count / 20 ?: 8; |
Artem Bityutskiy | 0798cea | 2010-04-30 13:02:33 +0300 | [diff] [blame] | 1238 | |
| 1239 | /* |
Artem Bityutskiy | 0525dac | 2010-09-03 17:11:37 +0300 | [diff] [blame] | 1240 | * Few corrupted PEBs is not a problem and may be just a result of |
Artem Bityutskiy | 0798cea | 2010-04-30 13:02:33 +0300 | [diff] [blame] | 1241 | * unclean reboots. However, many of them may indicate some problems |
| 1242 | * with the flash HW or driver. |
| 1243 | */ |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 1244 | if (ai->corr_peb_count) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1245 | ubi_err(ubi, "%d PEBs are corrupted and preserved", |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 1246 | ai->corr_peb_count); |
Artem Bityutskiy | e28453b | 2012-08-27 15:13:05 +0300 | [diff] [blame] | 1247 | pr_err("Corrupted PEBs are:"); |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 1248 | list_for_each_entry(aeb, &ai->corr, u.list) |
Artem Bityutskiy | e28453b | 2012-08-27 15:13:05 +0300 | [diff] [blame] | 1249 | pr_cont(" %d", aeb->pnum); |
| 1250 | pr_cont("\n"); |
Artem Bityutskiy | 0798cea | 2010-04-30 13:02:33 +0300 | [diff] [blame] | 1251 | |
| 1252 | /* |
| 1253 | * If too many PEBs are corrupted, we refuse attaching, |
| 1254 | * otherwise, only print a warning. |
| 1255 | */ |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 1256 | if (ai->corr_peb_count >= max_corr) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1257 | ubi_err(ubi, "too many corrupted PEBs, refusing"); |
Artem Bityutskiy | 0798cea | 2010-04-30 13:02:33 +0300 | [diff] [blame] | 1258 | return -EINVAL; |
| 1259 | } |
| 1260 | } |
| 1261 | |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 1262 | if (ai->empty_peb_count + ai->maybe_bad_peb_count == peb_count) { |
Artem Bityutskiy | 0525dac | 2010-09-03 17:11:37 +0300 | [diff] [blame] | 1263 | /* |
| 1264 | * All PEBs are empty, or almost all - a couple PEBs look like |
| 1265 | * they may be bad PEBs which were not marked as bad yet. |
| 1266 | * |
| 1267 | * This piece of code basically tries to distinguish between |
| 1268 | * the following situations: |
| 1269 | * |
| 1270 | * 1. Flash is empty, but there are few bad PEBs, which are not |
| 1271 | * marked as bad so far, and which were read with error. We |
| 1272 | * want to go ahead and format this flash. While formatting, |
| 1273 | * the faulty PEBs will probably be marked as bad. |
| 1274 | * |
| 1275 | * 2. Flash contains non-UBI data and we do not want to format |
| 1276 | * it and destroy possibly important information. |
| 1277 | */ |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 1278 | if (ai->maybe_bad_peb_count <= 2) { |
| 1279 | ai->is_empty = 1; |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1280 | ubi_msg(ubi, "empty MTD device detected"); |
Artem Bityutskiy | 0525dac | 2010-09-03 17:11:37 +0300 | [diff] [blame] | 1281 | get_random_bytes(&ubi->image_seq, |
| 1282 | sizeof(ubi->image_seq)); |
Artem Bityutskiy | 0798cea | 2010-04-30 13:02:33 +0300 | [diff] [blame] | 1283 | } else { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1284 | ubi_err(ubi, "MTD device is not UBI-formatted and possibly contains non-UBI data - refusing it"); |
Artem Bityutskiy | 0798cea | 2010-04-30 13:02:33 +0300 | [diff] [blame] | 1285 | return -EINVAL; |
| 1286 | } |
Artem Bityutskiy | 0525dac | 2010-09-03 17:11:37 +0300 | [diff] [blame] | 1287 | |
Artem Bityutskiy | 0798cea | 2010-04-30 13:02:33 +0300 | [diff] [blame] | 1288 | } |
| 1289 | |
Artem Bityutskiy | 0798cea | 2010-04-30 13:02:33 +0300 | [diff] [blame] | 1290 | return 0; |
| 1291 | } |
| 1292 | |
| 1293 | /** |
Artem Bityutskiy | fbd0107 | 2012-05-17 16:12:26 +0300 | [diff] [blame] | 1294 | * destroy_av - free volume attaching information. |
| 1295 | * @av: volume attaching information |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 1296 | * @ai: attaching information |
Boris Brezillon | f9efe8d | 2016-09-16 16:59:15 +0200 | [diff] [blame] | 1297 | * @list: put the aeb elements in there if !NULL, otherwise free them |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1298 | * |
Artem Bityutskiy | fbd0107 | 2012-05-17 16:12:26 +0300 | [diff] [blame] | 1299 | * This function destroys the volume attaching information. |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1300 | */ |
Boris Brezillon | f9efe8d | 2016-09-16 16:59:15 +0200 | [diff] [blame] | 1301 | static void destroy_av(struct ubi_attach_info *ai, struct ubi_ainf_volume *av, |
| 1302 | struct list_head *list) |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1303 | { |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 1304 | struct ubi_ainf_peb *aeb; |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 1305 | struct rb_node *this = av->root.rb_node; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1306 | |
| 1307 | while (this) { |
| 1308 | if (this->rb_left) |
| 1309 | this = this->rb_left; |
| 1310 | else if (this->rb_right) |
| 1311 | this = this->rb_right; |
| 1312 | else { |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 1313 | aeb = rb_entry(this, struct ubi_ainf_peb, u.rb); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1314 | this = rb_parent(this); |
| 1315 | if (this) { |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 1316 | if (this->rb_left == &aeb->u.rb) |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1317 | this->rb_left = NULL; |
| 1318 | else |
| 1319 | this->rb_right = NULL; |
| 1320 | } |
| 1321 | |
Boris Brezillon | f9efe8d | 2016-09-16 16:59:15 +0200 | [diff] [blame] | 1322 | if (list) |
| 1323 | list_add_tail(&aeb->u.list, list); |
| 1324 | else |
Boris Brezillon | 91f4285 | 2016-09-16 16:59:18 +0200 | [diff] [blame] | 1325 | ubi_free_aeb(ai, aeb); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1326 | } |
| 1327 | } |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 1328 | kfree(av); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1329 | } |
| 1330 | |
| 1331 | /** |
Richard Weinberger | dac6e20 | 2012-09-26 17:51:47 +0200 | [diff] [blame] | 1332 | * destroy_ai - destroy attaching information. |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 1333 | * @ai: attaching information |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1334 | */ |
Richard Weinberger | dac6e20 | 2012-09-26 17:51:47 +0200 | [diff] [blame] | 1335 | static void destroy_ai(struct ubi_attach_info *ai) |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1336 | { |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 1337 | struct ubi_ainf_peb *aeb, *aeb_tmp; |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 1338 | struct ubi_ainf_volume *av; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1339 | struct rb_node *rb; |
| 1340 | |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 1341 | list_for_each_entry_safe(aeb, aeb_tmp, &ai->alien, u.list) { |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 1342 | list_del(&aeb->u.list); |
Boris Brezillon | 91f4285 | 2016-09-16 16:59:18 +0200 | [diff] [blame] | 1343 | ubi_free_aeb(ai, aeb); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1344 | } |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 1345 | list_for_each_entry_safe(aeb, aeb_tmp, &ai->erase, u.list) { |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 1346 | list_del(&aeb->u.list); |
Boris Brezillon | 91f4285 | 2016-09-16 16:59:18 +0200 | [diff] [blame] | 1347 | ubi_free_aeb(ai, aeb); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1348 | } |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 1349 | list_for_each_entry_safe(aeb, aeb_tmp, &ai->corr, u.list) { |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 1350 | list_del(&aeb->u.list); |
Boris Brezillon | 91f4285 | 2016-09-16 16:59:18 +0200 | [diff] [blame] | 1351 | ubi_free_aeb(ai, aeb); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1352 | } |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 1353 | list_for_each_entry_safe(aeb, aeb_tmp, &ai->free, u.list) { |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 1354 | list_del(&aeb->u.list); |
Boris Brezillon | 91f4285 | 2016-09-16 16:59:18 +0200 | [diff] [blame] | 1355 | ubi_free_aeb(ai, aeb); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1356 | } |
Richard Weinberger | fdf10ed | 2016-06-14 10:12:15 +0200 | [diff] [blame] | 1357 | list_for_each_entry_safe(aeb, aeb_tmp, &ai->fastmap, u.list) { |
| 1358 | list_del(&aeb->u.list); |
Boris Brezillon | 91f4285 | 2016-09-16 16:59:18 +0200 | [diff] [blame] | 1359 | ubi_free_aeb(ai, aeb); |
Richard Weinberger | fdf10ed | 2016-06-14 10:12:15 +0200 | [diff] [blame] | 1360 | } |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1361 | |
| 1362 | /* Destroy the volume RB-tree */ |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 1363 | rb = ai->volumes.rb_node; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1364 | while (rb) { |
| 1365 | if (rb->rb_left) |
| 1366 | rb = rb->rb_left; |
| 1367 | else if (rb->rb_right) |
| 1368 | rb = rb->rb_right; |
| 1369 | else { |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 1370 | av = rb_entry(rb, struct ubi_ainf_volume, rb); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1371 | |
| 1372 | rb = rb_parent(rb); |
| 1373 | if (rb) { |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 1374 | if (rb->rb_left == &av->rb) |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1375 | rb->rb_left = NULL; |
| 1376 | else |
| 1377 | rb->rb_right = NULL; |
| 1378 | } |
| 1379 | |
Boris Brezillon | f9efe8d | 2016-09-16 16:59:15 +0200 | [diff] [blame] | 1380 | destroy_av(ai, av, NULL); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1381 | } |
| 1382 | } |
| 1383 | |
Julia Lawall | f9a113d | 2015-09-13 14:15:16 +0200 | [diff] [blame] | 1384 | kmem_cache_destroy(ai->aeb_slab_cache); |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 1385 | kfree(ai); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1386 | } |
| 1387 | |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1388 | /** |
Richard Weinberger | dac6e20 | 2012-09-26 17:51:47 +0200 | [diff] [blame] | 1389 | * scan_all - scan entire MTD device. |
| 1390 | * @ubi: UBI device description object |
| 1391 | * @ai: attach info object |
| 1392 | * @start: start scanning at this PEB |
| 1393 | * |
| 1394 | * This function does full scanning of an MTD device and returns complete |
| 1395 | * information about it in form of a "struct ubi_attach_info" object. In case |
| 1396 | * of failure, an error code is returned. |
| 1397 | */ |
| 1398 | static int scan_all(struct ubi_device *ubi, struct ubi_attach_info *ai, |
| 1399 | int start) |
| 1400 | { |
| 1401 | int err, pnum; |
| 1402 | struct rb_node *rb1, *rb2; |
| 1403 | struct ubi_ainf_volume *av; |
| 1404 | struct ubi_ainf_peb *aeb; |
| 1405 | |
| 1406 | err = -ENOMEM; |
| 1407 | |
Boris Brezillon | 7b6b749 | 2016-09-16 16:59:19 +0200 | [diff] [blame] | 1408 | ai->ech = kzalloc(ubi->ec_hdr_alsize, GFP_KERNEL); |
| 1409 | if (!ai->ech) |
Richard Weinberger | dac6e20 | 2012-09-26 17:51:47 +0200 | [diff] [blame] | 1410 | return err; |
| 1411 | |
Boris Brezillon | 3291b52 | 2016-09-16 16:59:26 +0200 | [diff] [blame] | 1412 | ai->vidb = ubi_alloc_vid_buf(ubi, GFP_KERNEL); |
| 1413 | if (!ai->vidb) |
Richard Weinberger | dac6e20 | 2012-09-26 17:51:47 +0200 | [diff] [blame] | 1414 | goto out_ech; |
| 1415 | |
| 1416 | for (pnum = start; pnum < ubi->peb_count; pnum++) { |
| 1417 | cond_resched(); |
| 1418 | |
| 1419 | dbg_gen("process PEB %d", pnum); |
Richard Weinberger | 74f2c6e | 2016-06-14 10:12:17 +0200 | [diff] [blame] | 1420 | err = scan_peb(ubi, ai, pnum, false); |
Richard Weinberger | dac6e20 | 2012-09-26 17:51:47 +0200 | [diff] [blame] | 1421 | if (err < 0) |
| 1422 | goto out_vidh; |
| 1423 | } |
| 1424 | |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1425 | ubi_msg(ubi, "scanning is finished"); |
Richard Weinberger | dac6e20 | 2012-09-26 17:51:47 +0200 | [diff] [blame] | 1426 | |
| 1427 | /* Calculate mean erase counter */ |
| 1428 | if (ai->ec_count) |
| 1429 | ai->mean_ec = div_u64(ai->ec_sum, ai->ec_count); |
| 1430 | |
| 1431 | err = late_analysis(ubi, ai); |
| 1432 | if (err) |
| 1433 | goto out_vidh; |
| 1434 | |
| 1435 | /* |
| 1436 | * In case of unknown erase counter we use the mean erase counter |
| 1437 | * value. |
| 1438 | */ |
| 1439 | ubi_rb_for_each_entry(rb1, av, &ai->volumes, rb) { |
| 1440 | ubi_rb_for_each_entry(rb2, aeb, &av->root, u.rb) |
| 1441 | if (aeb->ec == UBI_UNKNOWN) |
| 1442 | aeb->ec = ai->mean_ec; |
| 1443 | } |
| 1444 | |
| 1445 | list_for_each_entry(aeb, &ai->free, u.list) { |
| 1446 | if (aeb->ec == UBI_UNKNOWN) |
| 1447 | aeb->ec = ai->mean_ec; |
| 1448 | } |
| 1449 | |
| 1450 | list_for_each_entry(aeb, &ai->corr, u.list) |
| 1451 | if (aeb->ec == UBI_UNKNOWN) |
| 1452 | aeb->ec = ai->mean_ec; |
| 1453 | |
| 1454 | list_for_each_entry(aeb, &ai->erase, u.list) |
| 1455 | if (aeb->ec == UBI_UNKNOWN) |
| 1456 | aeb->ec = ai->mean_ec; |
| 1457 | |
| 1458 | err = self_check_ai(ubi, ai); |
| 1459 | if (err) |
| 1460 | goto out_vidh; |
| 1461 | |
Boris Brezillon | 3291b52 | 2016-09-16 16:59:26 +0200 | [diff] [blame] | 1462 | ubi_free_vid_buf(ai->vidb); |
Boris Brezillon | 7b6b749 | 2016-09-16 16:59:19 +0200 | [diff] [blame] | 1463 | kfree(ai->ech); |
Richard Weinberger | dac6e20 | 2012-09-26 17:51:47 +0200 | [diff] [blame] | 1464 | |
| 1465 | return 0; |
| 1466 | |
| 1467 | out_vidh: |
Boris Brezillon | 3291b52 | 2016-09-16 16:59:26 +0200 | [diff] [blame] | 1468 | ubi_free_vid_buf(ai->vidb); |
Richard Weinberger | dac6e20 | 2012-09-26 17:51:47 +0200 | [diff] [blame] | 1469 | out_ech: |
Boris Brezillon | 7b6b749 | 2016-09-16 16:59:19 +0200 | [diff] [blame] | 1470 | kfree(ai->ech); |
Richard Weinberger | dac6e20 | 2012-09-26 17:51:47 +0200 | [diff] [blame] | 1471 | return err; |
| 1472 | } |
| 1473 | |
Richard Weinberger | d2158f6 | 2014-10-06 15:58:07 +0200 | [diff] [blame] | 1474 | static struct ubi_attach_info *alloc_ai(void) |
Richard Weinberger | dac6e20 | 2012-09-26 17:51:47 +0200 | [diff] [blame] | 1475 | { |
| 1476 | struct ubi_attach_info *ai; |
| 1477 | |
| 1478 | ai = kzalloc(sizeof(struct ubi_attach_info), GFP_KERNEL); |
| 1479 | if (!ai) |
| 1480 | return ai; |
| 1481 | |
| 1482 | INIT_LIST_HEAD(&ai->corr); |
| 1483 | INIT_LIST_HEAD(&ai->free); |
| 1484 | INIT_LIST_HEAD(&ai->erase); |
| 1485 | INIT_LIST_HEAD(&ai->alien); |
Richard Weinberger | fdf10ed | 2016-06-14 10:12:15 +0200 | [diff] [blame] | 1486 | INIT_LIST_HEAD(&ai->fastmap); |
Richard Weinberger | dac6e20 | 2012-09-26 17:51:47 +0200 | [diff] [blame] | 1487 | ai->volumes = RB_ROOT; |
Richard Weinberger | d2158f6 | 2014-10-06 15:58:07 +0200 | [diff] [blame] | 1488 | ai->aeb_slab_cache = kmem_cache_create("ubi_aeb_slab_cache", |
Richard Weinberger | dac6e20 | 2012-09-26 17:51:47 +0200 | [diff] [blame] | 1489 | sizeof(struct ubi_ainf_peb), |
| 1490 | 0, 0, NULL); |
| 1491 | if (!ai->aeb_slab_cache) { |
| 1492 | kfree(ai); |
| 1493 | ai = NULL; |
| 1494 | } |
| 1495 | |
| 1496 | return ai; |
| 1497 | } |
| 1498 | |
Richard Weinberger | 98105d0 | 2014-10-06 15:39:01 +0200 | [diff] [blame] | 1499 | #ifdef CONFIG_MTD_UBI_FASTMAP |
| 1500 | |
| 1501 | /** |
Richard Weinberger | d139d30 | 2016-06-14 10:12:12 +0200 | [diff] [blame] | 1502 | * scan_fast - try to find a fastmap and attach from it. |
Richard Weinberger | 98105d0 | 2014-10-06 15:39:01 +0200 | [diff] [blame] | 1503 | * @ubi: UBI device description object |
| 1504 | * @ai: attach info object |
| 1505 | * |
| 1506 | * Returns 0 on success, negative return values indicate an internal |
| 1507 | * error. |
| 1508 | * UBI_NO_FASTMAP denotes that no fastmap was found. |
| 1509 | * UBI_BAD_FASTMAP denotes that the found fastmap was invalid. |
| 1510 | */ |
| 1511 | static int scan_fast(struct ubi_device *ubi, struct ubi_attach_info **ai) |
| 1512 | { |
Richard Weinberger | fdf10ed | 2016-06-14 10:12:15 +0200 | [diff] [blame] | 1513 | int err, pnum; |
| 1514 | struct ubi_attach_info *scan_ai; |
Richard Weinberger | 98105d0 | 2014-10-06 15:39:01 +0200 | [diff] [blame] | 1515 | |
| 1516 | err = -ENOMEM; |
| 1517 | |
Richard Weinberger | fdf10ed | 2016-06-14 10:12:15 +0200 | [diff] [blame] | 1518 | scan_ai = alloc_ai(); |
| 1519 | if (!scan_ai) |
| 1520 | goto out; |
| 1521 | |
Boris Brezillon | 7b6b749 | 2016-09-16 16:59:19 +0200 | [diff] [blame] | 1522 | scan_ai->ech = kzalloc(ubi->ec_hdr_alsize, GFP_KERNEL); |
| 1523 | if (!scan_ai->ech) |
Richard Weinberger | fdf10ed | 2016-06-14 10:12:15 +0200 | [diff] [blame] | 1524 | goto out_ai; |
Richard Weinberger | 98105d0 | 2014-10-06 15:39:01 +0200 | [diff] [blame] | 1525 | |
Boris Brezillon | 3291b52 | 2016-09-16 16:59:26 +0200 | [diff] [blame] | 1526 | scan_ai->vidb = ubi_alloc_vid_buf(ubi, GFP_KERNEL); |
| 1527 | if (!scan_ai->vidb) |
Richard Weinberger | 98105d0 | 2014-10-06 15:39:01 +0200 | [diff] [blame] | 1528 | goto out_ech; |
| 1529 | |
| 1530 | for (pnum = 0; pnum < UBI_FM_MAX_START; pnum++) { |
Richard Weinberger | 98105d0 | 2014-10-06 15:39:01 +0200 | [diff] [blame] | 1531 | cond_resched(); |
| 1532 | |
| 1533 | dbg_gen("process PEB %d", pnum); |
Richard Weinberger | 74f2c6e | 2016-06-14 10:12:17 +0200 | [diff] [blame] | 1534 | err = scan_peb(ubi, scan_ai, pnum, true); |
Richard Weinberger | 98105d0 | 2014-10-06 15:39:01 +0200 | [diff] [blame] | 1535 | if (err < 0) |
| 1536 | goto out_vidh; |
Richard Weinberger | 98105d0 | 2014-10-06 15:39:01 +0200 | [diff] [blame] | 1537 | } |
| 1538 | |
Boris Brezillon | 3291b52 | 2016-09-16 16:59:26 +0200 | [diff] [blame] | 1539 | ubi_free_vid_buf(scan_ai->vidb); |
Boris Brezillon | 7b6b749 | 2016-09-16 16:59:19 +0200 | [diff] [blame] | 1540 | kfree(scan_ai->ech); |
Richard Weinberger | 98105d0 | 2014-10-06 15:39:01 +0200 | [diff] [blame] | 1541 | |
Richard Weinberger | 74f2c6e | 2016-06-14 10:12:17 +0200 | [diff] [blame] | 1542 | if (scan_ai->force_full_scan) |
| 1543 | err = UBI_NO_FASTMAP; |
| 1544 | else |
| 1545 | err = ubi_scan_fastmap(ubi, *ai, scan_ai); |
| 1546 | |
Richard Weinberger | fdf10ed | 2016-06-14 10:12:15 +0200 | [diff] [blame] | 1547 | if (err) { |
| 1548 | /* |
| 1549 | * Didn't attach via fastmap, do a full scan but reuse what |
| 1550 | * we've aready scanned. |
| 1551 | */ |
| 1552 | destroy_ai(*ai); |
| 1553 | *ai = scan_ai; |
| 1554 | } else |
| 1555 | destroy_ai(scan_ai); |
Richard Weinberger | 98105d0 | 2014-10-06 15:39:01 +0200 | [diff] [blame] | 1556 | |
Richard Weinberger | fdf10ed | 2016-06-14 10:12:15 +0200 | [diff] [blame] | 1557 | return err; |
Richard Weinberger | 98105d0 | 2014-10-06 15:39:01 +0200 | [diff] [blame] | 1558 | |
| 1559 | out_vidh: |
Boris Brezillon | 3291b52 | 2016-09-16 16:59:26 +0200 | [diff] [blame] | 1560 | ubi_free_vid_buf(scan_ai->vidb); |
Richard Weinberger | 98105d0 | 2014-10-06 15:39:01 +0200 | [diff] [blame] | 1561 | out_ech: |
Boris Brezillon | 7b6b749 | 2016-09-16 16:59:19 +0200 | [diff] [blame] | 1562 | kfree(scan_ai->ech); |
Richard Weinberger | fdf10ed | 2016-06-14 10:12:15 +0200 | [diff] [blame] | 1563 | out_ai: |
| 1564 | destroy_ai(scan_ai); |
Richard Weinberger | 98105d0 | 2014-10-06 15:39:01 +0200 | [diff] [blame] | 1565 | out: |
| 1566 | return err; |
| 1567 | } |
| 1568 | |
| 1569 | #endif |
| 1570 | |
Richard Weinberger | dac6e20 | 2012-09-26 17:51:47 +0200 | [diff] [blame] | 1571 | /** |
| 1572 | * ubi_attach - attach an MTD device. |
| 1573 | * @ubi: UBI device descriptor |
| 1574 | * @force_scan: if set to non-zero attach by scanning |
| 1575 | * |
| 1576 | * This function returns zero in case of success and a negative error code in |
| 1577 | * case of failure. |
| 1578 | */ |
| 1579 | int ubi_attach(struct ubi_device *ubi, int force_scan) |
| 1580 | { |
| 1581 | int err; |
| 1582 | struct ubi_attach_info *ai; |
| 1583 | |
Richard Weinberger | d2158f6 | 2014-10-06 15:58:07 +0200 | [diff] [blame] | 1584 | ai = alloc_ai(); |
Richard Weinberger | dac6e20 | 2012-09-26 17:51:47 +0200 | [diff] [blame] | 1585 | if (!ai) |
| 1586 | return -ENOMEM; |
| 1587 | |
| 1588 | #ifdef CONFIG_MTD_UBI_FASTMAP |
| 1589 | /* On small flash devices we disable fastmap in any case. */ |
| 1590 | if ((int)mtd_div_by_eb(ubi->mtd->size, ubi->mtd) <= UBI_FM_MAX_START) { |
| 1591 | ubi->fm_disabled = 1; |
| 1592 | force_scan = 1; |
| 1593 | } |
| 1594 | |
| 1595 | if (force_scan) |
| 1596 | err = scan_all(ubi, ai, 0); |
| 1597 | else { |
Richard Weinberger | 98105d0 | 2014-10-06 15:39:01 +0200 | [diff] [blame] | 1598 | err = scan_fast(ubi, &ai); |
Richard Weinberger | 180a535 | 2015-03-09 10:04:09 +0100 | [diff] [blame] | 1599 | if (err > 0 || mtd_is_eccerr(err)) { |
Richard Weinberger | dac6e20 | 2012-09-26 17:51:47 +0200 | [diff] [blame] | 1600 | if (err != UBI_NO_FASTMAP) { |
| 1601 | destroy_ai(ai); |
Richard Weinberger | d2158f6 | 2014-10-06 15:58:07 +0200 | [diff] [blame] | 1602 | ai = alloc_ai(); |
Richard Weinberger | dac6e20 | 2012-09-26 17:51:47 +0200 | [diff] [blame] | 1603 | if (!ai) |
| 1604 | return -ENOMEM; |
Richard Weinberger | dac6e20 | 2012-09-26 17:51:47 +0200 | [diff] [blame] | 1605 | |
Richard Weinberger | 4b3e0a2 | 2013-09-28 15:55:12 +0200 | [diff] [blame] | 1606 | err = scan_all(ubi, ai, 0); |
| 1607 | } else { |
| 1608 | err = scan_all(ubi, ai, UBI_FM_MAX_START); |
| 1609 | } |
Richard Weinberger | dac6e20 | 2012-09-26 17:51:47 +0200 | [diff] [blame] | 1610 | } |
| 1611 | } |
| 1612 | #else |
| 1613 | err = scan_all(ubi, ai, 0); |
| 1614 | #endif |
| 1615 | if (err) |
| 1616 | goto out_ai; |
| 1617 | |
| 1618 | ubi->bad_peb_count = ai->bad_peb_count; |
| 1619 | ubi->good_peb_count = ubi->peb_count - ubi->bad_peb_count; |
| 1620 | ubi->corr_peb_count = ai->corr_peb_count; |
| 1621 | ubi->max_ec = ai->max_ec; |
| 1622 | ubi->mean_ec = ai->mean_ec; |
| 1623 | dbg_gen("max. sequence number: %llu", ai->max_sqnum); |
| 1624 | |
| 1625 | err = ubi_read_volume_table(ubi, ai); |
| 1626 | if (err) |
| 1627 | goto out_ai; |
| 1628 | |
| 1629 | err = ubi_wl_init(ubi, ai); |
| 1630 | if (err) |
| 1631 | goto out_vtbl; |
| 1632 | |
| 1633 | err = ubi_eba_init(ubi, ai); |
| 1634 | if (err) |
| 1635 | goto out_wl; |
| 1636 | |
| 1637 | #ifdef CONFIG_MTD_UBI_FASTMAP |
Richard Weinberger | 560d86a | 2014-10-27 13:00:26 +0100 | [diff] [blame] | 1638 | if (ubi->fm && ubi_dbg_chk_fastmap(ubi)) { |
Richard Weinberger | dac6e20 | 2012-09-26 17:51:47 +0200 | [diff] [blame] | 1639 | struct ubi_attach_info *scan_ai; |
| 1640 | |
Richard Weinberger | d2158f6 | 2014-10-06 15:58:07 +0200 | [diff] [blame] | 1641 | scan_ai = alloc_ai(); |
Julia Lawall | 4d52514 | 2013-12-29 23:47:19 +0100 | [diff] [blame] | 1642 | if (!scan_ai) { |
| 1643 | err = -ENOMEM; |
Richard Weinberger | dac6e20 | 2012-09-26 17:51:47 +0200 | [diff] [blame] | 1644 | goto out_wl; |
Julia Lawall | 4d52514 | 2013-12-29 23:47:19 +0100 | [diff] [blame] | 1645 | } |
Richard Weinberger | dac6e20 | 2012-09-26 17:51:47 +0200 | [diff] [blame] | 1646 | |
| 1647 | err = scan_all(ubi, scan_ai, 0); |
| 1648 | if (err) { |
| 1649 | destroy_ai(scan_ai); |
| 1650 | goto out_wl; |
| 1651 | } |
| 1652 | |
| 1653 | err = self_check_eba(ubi, ai, scan_ai); |
| 1654 | destroy_ai(scan_ai); |
| 1655 | |
| 1656 | if (err) |
| 1657 | goto out_wl; |
| 1658 | } |
| 1659 | #endif |
| 1660 | |
| 1661 | destroy_ai(ai); |
| 1662 | return 0; |
| 1663 | |
| 1664 | out_wl: |
| 1665 | ubi_wl_close(ubi); |
| 1666 | out_vtbl: |
| 1667 | ubi_free_internal_volumes(ubi); |
| 1668 | vfree(ubi->vtbl); |
| 1669 | out_ai: |
| 1670 | destroy_ai(ai); |
| 1671 | return err; |
| 1672 | } |
| 1673 | |
| 1674 | /** |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 1675 | * self_check_ai - check the attaching information. |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1676 | * @ubi: UBI device description object |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 1677 | * @ai: attaching information |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1678 | * |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 1679 | * This function returns zero if the attaching information is all right, and a |
Artem Bityutskiy | adbf05e | 2010-01-20 10:28:58 +0200 | [diff] [blame] | 1680 | * negative error code if not or if an error occurred. |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1681 | */ |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 1682 | static int self_check_ai(struct ubi_device *ubi, struct ubi_attach_info *ai) |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1683 | { |
Boris Brezillon | 3291b52 | 2016-09-16 16:59:26 +0200 | [diff] [blame] | 1684 | struct ubi_vid_io_buf *vidb = ai->vidb; |
| 1685 | struct ubi_vid_hdr *vidh = ubi_get_vid_hdr(vidb); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1686 | int pnum, err, vols_found = 0; |
| 1687 | struct rb_node *rb1, *rb2; |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 1688 | struct ubi_ainf_volume *av; |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 1689 | struct ubi_ainf_peb *aeb, *last_aeb; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1690 | uint8_t *buf; |
| 1691 | |
Ezequiel Garcia | 6457557 | 2012-11-28 09:18:29 -0300 | [diff] [blame] | 1692 | if (!ubi_dbg_chk_gen(ubi)) |
Artem Bityutskiy | 92d124f | 2011-03-14 18:17:40 +0200 | [diff] [blame] | 1693 | return 0; |
| 1694 | |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1695 | /* |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 1696 | * At first, check that attaching information is OK. |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1697 | */ |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 1698 | ubi_rb_for_each_entry(rb1, av, &ai->volumes, rb) { |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1699 | int leb_count = 0; |
| 1700 | |
| 1701 | cond_resched(); |
| 1702 | |
| 1703 | vols_found += 1; |
| 1704 | |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 1705 | if (ai->is_empty) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1706 | ubi_err(ubi, "bad is_empty flag"); |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 1707 | goto bad_av; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1708 | } |
| 1709 | |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 1710 | if (av->vol_id < 0 || av->highest_lnum < 0 || |
| 1711 | av->leb_count < 0 || av->vol_type < 0 || av->used_ebs < 0 || |
| 1712 | av->data_pad < 0 || av->last_data_size < 0) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1713 | ubi_err(ubi, "negative values"); |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 1714 | goto bad_av; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1715 | } |
| 1716 | |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 1717 | if (av->vol_id >= UBI_MAX_VOLUMES && |
| 1718 | av->vol_id < UBI_INTERNAL_VOL_START) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1719 | ubi_err(ubi, "bad vol_id"); |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 1720 | goto bad_av; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1721 | } |
| 1722 | |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 1723 | if (av->vol_id > ai->highest_vol_id) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1724 | ubi_err(ubi, "highest_vol_id is %d, but vol_id %d is there", |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 1725 | ai->highest_vol_id, av->vol_id); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1726 | goto out; |
| 1727 | } |
| 1728 | |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 1729 | if (av->vol_type != UBI_DYNAMIC_VOLUME && |
| 1730 | av->vol_type != UBI_STATIC_VOLUME) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1731 | ubi_err(ubi, "bad vol_type"); |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 1732 | goto bad_av; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1733 | } |
| 1734 | |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 1735 | if (av->data_pad > ubi->leb_size / 2) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1736 | ubi_err(ubi, "bad data_pad"); |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 1737 | goto bad_av; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1738 | } |
| 1739 | |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 1740 | last_aeb = NULL; |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 1741 | ubi_rb_for_each_entry(rb2, aeb, &av->root, u.rb) { |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1742 | cond_resched(); |
| 1743 | |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 1744 | last_aeb = aeb; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1745 | leb_count += 1; |
| 1746 | |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 1747 | if (aeb->pnum < 0 || aeb->ec < 0) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1748 | ubi_err(ubi, "negative values"); |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 1749 | goto bad_aeb; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1750 | } |
| 1751 | |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 1752 | if (aeb->ec < ai->min_ec) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1753 | ubi_err(ubi, "bad ai->min_ec (%d), %d found", |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 1754 | ai->min_ec, aeb->ec); |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 1755 | goto bad_aeb; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1756 | } |
| 1757 | |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 1758 | if (aeb->ec > ai->max_ec) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1759 | ubi_err(ubi, "bad ai->max_ec (%d), %d found", |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 1760 | ai->max_ec, aeb->ec); |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 1761 | goto bad_aeb; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1762 | } |
| 1763 | |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 1764 | if (aeb->pnum >= ubi->peb_count) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1765 | ubi_err(ubi, "too high PEB number %d, total PEBs %d", |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 1766 | aeb->pnum, ubi->peb_count); |
| 1767 | goto bad_aeb; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1768 | } |
| 1769 | |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 1770 | if (av->vol_type == UBI_STATIC_VOLUME) { |
| 1771 | if (aeb->lnum >= av->used_ebs) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1772 | ubi_err(ubi, "bad lnum or used_ebs"); |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 1773 | goto bad_aeb; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1774 | } |
| 1775 | } else { |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 1776 | if (av->used_ebs != 0) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1777 | ubi_err(ubi, "non-zero used_ebs"); |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 1778 | goto bad_aeb; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1779 | } |
| 1780 | } |
| 1781 | |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 1782 | if (aeb->lnum > av->highest_lnum) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1783 | ubi_err(ubi, "incorrect highest_lnum or lnum"); |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 1784 | goto bad_aeb; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1785 | } |
| 1786 | } |
| 1787 | |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 1788 | if (av->leb_count != leb_count) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1789 | ubi_err(ubi, "bad leb_count, %d objects in the tree", |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1790 | leb_count); |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 1791 | goto bad_av; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1792 | } |
| 1793 | |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 1794 | if (!last_aeb) |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1795 | continue; |
| 1796 | |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 1797 | aeb = last_aeb; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1798 | |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 1799 | if (aeb->lnum != av->highest_lnum) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1800 | ubi_err(ubi, "bad highest_lnum"); |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 1801 | goto bad_aeb; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1802 | } |
| 1803 | } |
| 1804 | |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 1805 | if (vols_found != ai->vols_found) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1806 | ubi_err(ubi, "bad ai->vols_found %d, should be %d", |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 1807 | ai->vols_found, vols_found); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1808 | goto out; |
| 1809 | } |
| 1810 | |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 1811 | /* Check that attaching information is correct */ |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 1812 | ubi_rb_for_each_entry(rb1, av, &ai->volumes, rb) { |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 1813 | last_aeb = NULL; |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 1814 | ubi_rb_for_each_entry(rb2, aeb, &av->root, u.rb) { |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1815 | int vol_type; |
| 1816 | |
| 1817 | cond_resched(); |
| 1818 | |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 1819 | last_aeb = aeb; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1820 | |
Boris Brezillon | 3291b52 | 2016-09-16 16:59:26 +0200 | [diff] [blame] | 1821 | err = ubi_io_read_vid_hdr(ubi, aeb->pnum, vidb, 1); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1822 | if (err && err != UBI_IO_BITFLIPS) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1823 | ubi_err(ubi, "VID header is not OK (%d)", |
| 1824 | err); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1825 | if (err > 0) |
| 1826 | err = -EIO; |
| 1827 | return err; |
| 1828 | } |
| 1829 | |
| 1830 | vol_type = vidh->vol_type == UBI_VID_DYNAMIC ? |
| 1831 | UBI_DYNAMIC_VOLUME : UBI_STATIC_VOLUME; |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 1832 | if (av->vol_type != vol_type) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1833 | ubi_err(ubi, "bad vol_type"); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1834 | goto bad_vid_hdr; |
| 1835 | } |
| 1836 | |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 1837 | if (aeb->sqnum != be64_to_cpu(vidh->sqnum)) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1838 | ubi_err(ubi, "bad sqnum %llu", aeb->sqnum); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1839 | goto bad_vid_hdr; |
| 1840 | } |
| 1841 | |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 1842 | if (av->vol_id != be32_to_cpu(vidh->vol_id)) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1843 | ubi_err(ubi, "bad vol_id %d", av->vol_id); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1844 | goto bad_vid_hdr; |
| 1845 | } |
| 1846 | |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 1847 | if (av->compat != vidh->compat) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1848 | ubi_err(ubi, "bad compat %d", vidh->compat); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1849 | goto bad_vid_hdr; |
| 1850 | } |
| 1851 | |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 1852 | if (aeb->lnum != be32_to_cpu(vidh->lnum)) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1853 | ubi_err(ubi, "bad lnum %d", aeb->lnum); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1854 | goto bad_vid_hdr; |
| 1855 | } |
| 1856 | |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 1857 | if (av->used_ebs != be32_to_cpu(vidh->used_ebs)) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1858 | ubi_err(ubi, "bad used_ebs %d", av->used_ebs); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1859 | goto bad_vid_hdr; |
| 1860 | } |
| 1861 | |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 1862 | if (av->data_pad != be32_to_cpu(vidh->data_pad)) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1863 | ubi_err(ubi, "bad data_pad %d", av->data_pad); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1864 | goto bad_vid_hdr; |
| 1865 | } |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1866 | } |
| 1867 | |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 1868 | if (!last_aeb) |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1869 | continue; |
| 1870 | |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 1871 | if (av->highest_lnum != be32_to_cpu(vidh->lnum)) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1872 | ubi_err(ubi, "bad highest_lnum %d", av->highest_lnum); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1873 | goto bad_vid_hdr; |
| 1874 | } |
| 1875 | |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 1876 | if (av->last_data_size != be32_to_cpu(vidh->data_size)) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1877 | ubi_err(ubi, "bad last_data_size %d", |
| 1878 | av->last_data_size); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1879 | goto bad_vid_hdr; |
| 1880 | } |
| 1881 | } |
| 1882 | |
| 1883 | /* |
| 1884 | * Make sure that all the physical eraseblocks are in one of the lists |
| 1885 | * or trees. |
| 1886 | */ |
Mariusz Kozlowski | d9b0744 | 2007-08-01 00:02:10 +0200 | [diff] [blame] | 1887 | buf = kzalloc(ubi->peb_count, GFP_KERNEL); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1888 | if (!buf) |
| 1889 | return -ENOMEM; |
| 1890 | |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1891 | for (pnum = 0; pnum < ubi->peb_count; pnum++) { |
| 1892 | err = ubi_io_is_bad(ubi, pnum); |
Artem Bityutskiy | 341e1a0 | 2007-05-03 11:59:51 +0300 | [diff] [blame] | 1893 | if (err < 0) { |
| 1894 | kfree(buf); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1895 | return err; |
Artem Bityutskiy | 9c9ec14 | 2008-07-18 13:19:52 +0300 | [diff] [blame] | 1896 | } else if (err) |
Mariusz Kozlowski | d9b0744 | 2007-08-01 00:02:10 +0200 | [diff] [blame] | 1897 | buf[pnum] = 1; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1898 | } |
| 1899 | |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 1900 | ubi_rb_for_each_entry(rb1, av, &ai->volumes, rb) |
| 1901 | ubi_rb_for_each_entry(rb2, aeb, &av->root, u.rb) |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 1902 | buf[aeb->pnum] = 1; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1903 | |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 1904 | list_for_each_entry(aeb, &ai->free, u.list) |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 1905 | buf[aeb->pnum] = 1; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1906 | |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 1907 | list_for_each_entry(aeb, &ai->corr, u.list) |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 1908 | buf[aeb->pnum] = 1; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1909 | |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 1910 | list_for_each_entry(aeb, &ai->erase, u.list) |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 1911 | buf[aeb->pnum] = 1; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1912 | |
Artem Bityutskiy | a4e6042 | 2012-05-17 13:09:08 +0300 | [diff] [blame] | 1913 | list_for_each_entry(aeb, &ai->alien, u.list) |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 1914 | buf[aeb->pnum] = 1; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1915 | |
| 1916 | err = 0; |
| 1917 | for (pnum = 0; pnum < ubi->peb_count; pnum++) |
Mariusz Kozlowski | d9b0744 | 2007-08-01 00:02:10 +0200 | [diff] [blame] | 1918 | if (!buf[pnum]) { |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1919 | ubi_err(ubi, "PEB %d is not referred", pnum); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1920 | err = 1; |
| 1921 | } |
| 1922 | |
| 1923 | kfree(buf); |
| 1924 | if (err) |
| 1925 | goto out; |
| 1926 | return 0; |
| 1927 | |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 1928 | bad_aeb: |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1929 | ubi_err(ubi, "bad attaching information about LEB %d", aeb->lnum); |
Artem Bityutskiy | 2c5ec5c | 2012-05-17 08:26:24 +0300 | [diff] [blame] | 1930 | ubi_dump_aeb(aeb, 0); |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 1931 | ubi_dump_av(av); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1932 | goto out; |
| 1933 | |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 1934 | bad_av: |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1935 | ubi_err(ubi, "bad attaching information about volume %d", av->vol_id); |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 1936 | ubi_dump_av(av); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1937 | goto out; |
| 1938 | |
| 1939 | bad_vid_hdr: |
Tanya Brokhman | 32608703 | 2014-10-20 19:57:00 +0300 | [diff] [blame] | 1940 | ubi_err(ubi, "bad attaching information about volume %d", av->vol_id); |
Artem Bityutskiy | 517af48 | 2012-05-17 14:38:34 +0300 | [diff] [blame] | 1941 | ubi_dump_av(av); |
Artem Bityutskiy | a904e3f | 2012-04-25 09:02:44 +0300 | [diff] [blame] | 1942 | ubi_dump_vid_hdr(vidh); |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1943 | |
| 1944 | out: |
Artem Bityutskiy | 25886a3 | 2012-04-24 06:59:49 +0300 | [diff] [blame] | 1945 | dump_stack(); |
Artem Bityutskiy | adbf05e | 2010-01-20 10:28:58 +0200 | [diff] [blame] | 1946 | return -EINVAL; |
Artem B. Bityutskiy | 801c135 | 2006-06-27 12:22:22 +0400 | [diff] [blame] | 1947 | } |