Tom Rini | 8b0c8a1 | 2018-05-06 18:27:01 -0400 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause |
Thomas Gleixner | 820d24d | 2016-07-12 20:28:12 +0200 | [diff] [blame] | 2 | /* |
| 3 | * Copyright (c) Thomas Gleixner <tglx@linutronix.de> |
| 4 | * |
| 5 | * The parts taken from the kernel implementation are: |
| 6 | * |
| 7 | * Copyright (c) International Business Machines Corp., 2006 |
Thomas Gleixner | 820d24d | 2016-07-12 20:28:12 +0200 | [diff] [blame] | 8 | */ |
| 9 | |
Thomas Gleixner | 820d24d | 2016-07-12 20:28:12 +0200 | [diff] [blame] | 10 | #include <errno.h> |
Simon Glass | c06c1be | 2020-05-10 11:40:08 -0600 | [diff] [blame] | 11 | #include <linux/bug.h> |
Simon Glass | 48b6c6b | 2019-11-14 12:57:16 -0700 | [diff] [blame] | 12 | #include <u-boot/crc.h> |
Thomas Gleixner | 820d24d | 2016-07-12 20:28:12 +0200 | [diff] [blame] | 13 | #include <ubispl.h> |
| 14 | |
Simon Glass | 4dcacfc | 2020-05-10 11:40:13 -0600 | [diff] [blame] | 15 | #include <linux/bitops.h> |
Thomas Gleixner | 820d24d | 2016-07-12 20:28:12 +0200 | [diff] [blame] | 16 | #include <linux/crc32.h> |
| 17 | |
| 18 | #include "ubispl.h" |
| 19 | |
| 20 | /** |
| 21 | * ubi_calc_fm_size - calculates the fastmap size in bytes for an UBI device. |
| 22 | * @ubi: UBI device description object |
| 23 | */ |
| 24 | static size_t ubi_calc_fm_size(struct ubi_scan_info *ubi) |
| 25 | { |
| 26 | size_t size; |
| 27 | |
| 28 | size = sizeof(struct ubi_fm_sb) + |
| 29 | sizeof(struct ubi_fm_hdr) + |
| 30 | sizeof(struct ubi_fm_scan_pool) + |
| 31 | sizeof(struct ubi_fm_scan_pool) + |
| 32 | (ubi->peb_count * sizeof(struct ubi_fm_ec)) + |
| 33 | (sizeof(struct ubi_fm_eba) + |
| 34 | (ubi->peb_count * sizeof(__be32))) + |
| 35 | sizeof(struct ubi_fm_volhdr) * UBI_MAX_VOLUMES; |
| 36 | return roundup(size, ubi->leb_size); |
| 37 | } |
| 38 | |
| 39 | static int ubi_io_read(struct ubi_scan_info *ubi, void *buf, int pnum, |
| 40 | unsigned long from, unsigned long len) |
| 41 | { |
| 42 | return ubi->read(pnum + ubi->peb_offset, from, len, buf); |
| 43 | } |
| 44 | |
| 45 | static int ubi_io_is_bad(struct ubi_scan_info *ubi, int peb) |
| 46 | { |
| 47 | return peb >= ubi->peb_count || peb < 0; |
| 48 | } |
| 49 | |
Hamish Guthrie | 3ce740d | 2019-05-15 15:15:59 +0200 | [diff] [blame] | 50 | #ifdef CONFIG_SPL_UBI_LOAD_BY_VOLNAME |
| 51 | |
| 52 | /** |
| 53 | * ubi_dump_vtbl_record - dump a &struct ubi_vtbl_record object. |
| 54 | * @r: the object to dump |
| 55 | * @idx: volume table index |
| 56 | */ |
| 57 | void ubi_dump_vtbl_record(const struct ubi_vtbl_record *r, int idx) |
| 58 | { |
| 59 | int name_len = be16_to_cpu(r->name_len); |
| 60 | |
| 61 | ubi_dbg("Volume table record %d dump: size: %d", |
| 62 | idx, sizeof(struct ubi_vtbl_record)); |
| 63 | ubi_dbg("\treserved_pebs %d", be32_to_cpu(r->reserved_pebs)); |
| 64 | ubi_dbg("\talignment %d", be32_to_cpu(r->alignment)); |
| 65 | ubi_dbg("\tdata_pad %d", be32_to_cpu(r->data_pad)); |
| 66 | ubi_dbg("\tvol_type %d", (int)r->vol_type); |
| 67 | ubi_dbg("\tupd_marker %d", (int)r->upd_marker); |
| 68 | ubi_dbg("\tname_len %d", name_len); |
| 69 | |
| 70 | if (r->name[0] == '\0') { |
| 71 | ubi_dbg("\tname NULL"); |
| 72 | return; |
| 73 | } |
| 74 | |
| 75 | if (name_len <= UBI_VOL_NAME_MAX && |
| 76 | strnlen(&r->name[0], name_len + 1) == name_len) { |
| 77 | ubi_dbg("\tname %s", &r->name[0]); |
| 78 | } else { |
| 79 | ubi_dbg("\t1st 5 characters of name: %c%c%c%c%c", |
| 80 | r->name[0], r->name[1], r->name[2], r->name[3], |
| 81 | r->name[4]); |
| 82 | } |
| 83 | ubi_dbg("\tcrc %#08x", be32_to_cpu(r->crc)); |
| 84 | } |
| 85 | |
| 86 | /* Empty volume table record */ |
| 87 | static struct ubi_vtbl_record empty_vtbl_record; |
| 88 | |
| 89 | /** |
| 90 | * vtbl_check - check if volume table is not corrupted and sensible. |
| 91 | * @ubi: UBI device description object |
| 92 | * @vtbl: volume table |
| 93 | * |
| 94 | * This function returns zero if @vtbl is all right, %1 if CRC is incorrect, |
| 95 | * and %-EINVAL if it contains inconsistent data. |
| 96 | */ |
| 97 | static int vtbl_check(struct ubi_scan_info *ubi, |
| 98 | struct ubi_vtbl_record *vtbl) |
| 99 | { |
| 100 | int i, n, reserved_pebs, alignment, data_pad, vol_type, name_len; |
| 101 | int upd_marker, err; |
| 102 | uint32_t crc; |
| 103 | const char *name; |
| 104 | |
| 105 | for (i = 0; i < UBI_SPL_VOL_IDS; i++) { |
| 106 | reserved_pebs = be32_to_cpu(vtbl[i].reserved_pebs); |
| 107 | alignment = be32_to_cpu(vtbl[i].alignment); |
| 108 | data_pad = be32_to_cpu(vtbl[i].data_pad); |
| 109 | upd_marker = vtbl[i].upd_marker; |
| 110 | vol_type = vtbl[i].vol_type; |
| 111 | name_len = be16_to_cpu(vtbl[i].name_len); |
| 112 | name = &vtbl[i].name[0]; |
| 113 | |
| 114 | crc = crc32(UBI_CRC32_INIT, &vtbl[i], UBI_VTBL_RECORD_SIZE_CRC); |
| 115 | if (be32_to_cpu(vtbl[i].crc) != crc) { |
| 116 | ubi_err("bad CRC at record %u: %#08x, not %#08x", |
| 117 | i, crc, be32_to_cpu(vtbl[i].crc)); |
| 118 | ubi_dump_vtbl_record(&vtbl[i], i); |
| 119 | return 1; |
| 120 | } |
| 121 | |
| 122 | if (reserved_pebs == 0) { |
| 123 | if (memcmp(&vtbl[i], &empty_vtbl_record, |
| 124 | UBI_VTBL_RECORD_SIZE)) { |
| 125 | err = 2; |
| 126 | goto bad; |
| 127 | } |
| 128 | continue; |
| 129 | } |
| 130 | |
| 131 | if (reserved_pebs < 0 || alignment < 0 || data_pad < 0 || |
| 132 | name_len < 0) { |
| 133 | err = 3; |
| 134 | goto bad; |
| 135 | } |
| 136 | |
| 137 | if (alignment > ubi->leb_size || alignment == 0) { |
| 138 | err = 4; |
| 139 | goto bad; |
| 140 | } |
| 141 | |
| 142 | n = alignment & (CONFIG_SPL_UBI_VID_OFFSET - 1); |
| 143 | if (alignment != 1 && n) { |
| 144 | err = 5; |
| 145 | goto bad; |
| 146 | } |
| 147 | |
| 148 | n = ubi->leb_size % alignment; |
| 149 | if (data_pad != n) { |
| 150 | ubi_err("bad data_pad, has to be %d", n); |
| 151 | err = 6; |
| 152 | goto bad; |
| 153 | } |
| 154 | |
| 155 | if (vol_type != UBI_VID_DYNAMIC && vol_type != UBI_VID_STATIC) { |
| 156 | err = 7; |
| 157 | goto bad; |
| 158 | } |
| 159 | |
| 160 | if (upd_marker != 0 && upd_marker != 1) { |
| 161 | err = 8; |
| 162 | goto bad; |
| 163 | } |
| 164 | |
| 165 | if (name_len > UBI_VOL_NAME_MAX) { |
| 166 | err = 10; |
| 167 | goto bad; |
| 168 | } |
| 169 | |
| 170 | if (name[0] == '\0') { |
| 171 | err = 11; |
| 172 | goto bad; |
| 173 | } |
| 174 | |
| 175 | if (name_len != strnlen(name, name_len + 1)) { |
| 176 | err = 12; |
| 177 | goto bad; |
| 178 | } |
| 179 | |
| 180 | ubi_dump_vtbl_record(&vtbl[i], i); |
| 181 | } |
| 182 | |
| 183 | /* Checks that all names are unique */ |
| 184 | for (i = 0; i < UBI_SPL_VOL_IDS - 1; i++) { |
| 185 | for (n = i + 1; n < UBI_SPL_VOL_IDS; n++) { |
| 186 | int len1 = be16_to_cpu(vtbl[i].name_len); |
| 187 | int len2 = be16_to_cpu(vtbl[n].name_len); |
| 188 | |
| 189 | if (len1 > 0 && len1 == len2 && |
| 190 | !strncmp(vtbl[i].name, vtbl[n].name, len1)) { |
| 191 | ubi_err("volumes %d and %d have the same name \"%s\"", |
| 192 | i, n, vtbl[i].name); |
| 193 | ubi_dump_vtbl_record(&vtbl[i], i); |
| 194 | ubi_dump_vtbl_record(&vtbl[n], n); |
| 195 | return -EINVAL; |
| 196 | } |
| 197 | } |
| 198 | } |
| 199 | |
| 200 | return 0; |
| 201 | |
| 202 | bad: |
| 203 | ubi_err("volume table check failed: record %d, error %d", i, err); |
| 204 | ubi_dump_vtbl_record(&vtbl[i], i); |
| 205 | return -EINVAL; |
| 206 | } |
| 207 | |
| 208 | static int ubi_read_volume_table(struct ubi_scan_info *ubi, u32 pnum) |
| 209 | { |
| 210 | int err = -EINVAL; |
| 211 | |
| 212 | empty_vtbl_record.crc = cpu_to_be32(0xf116c36b); |
| 213 | |
| 214 | err = ubi_io_read(ubi, &ubi->vtbl, pnum, ubi->leb_start, |
| 215 | sizeof(struct ubi_vtbl_record) * UBI_SPL_VOL_IDS); |
| 216 | if (err && err != UBI_IO_BITFLIPS) { |
| 217 | ubi_err("unable to read volume table"); |
| 218 | goto out; |
| 219 | } |
| 220 | |
| 221 | if (!vtbl_check(ubi, ubi->vtbl)) { |
| 222 | ubi->vtbl_valid = 1; |
| 223 | err = 0; |
| 224 | } |
| 225 | out: |
| 226 | return err; |
| 227 | } |
| 228 | |
| 229 | #endif /* CONFIG_SPL_UBI_LOAD_BY_VOLNAME */ |
| 230 | |
Thomas Gleixner | 820d24d | 2016-07-12 20:28:12 +0200 | [diff] [blame] | 231 | static int ubi_io_read_vid_hdr(struct ubi_scan_info *ubi, int pnum, |
| 232 | struct ubi_vid_hdr *vh, int unused) |
| 233 | { |
| 234 | u32 magic; |
| 235 | int res; |
| 236 | |
| 237 | /* No point in rescanning a corrupt block */ |
| 238 | if (test_bit(pnum, ubi->corrupt)) |
| 239 | return UBI_IO_BAD_HDR; |
| 240 | /* |
| 241 | * If the block has been scanned already, no need to rescan |
| 242 | */ |
| 243 | if (test_and_set_bit(pnum, ubi->scanned)) |
| 244 | return 0; |
| 245 | |
| 246 | res = ubi_io_read(ubi, vh, pnum, ubi->vid_offset, sizeof(*vh)); |
| 247 | |
| 248 | /* |
| 249 | * Bad block, unrecoverable ECC error, skip the block |
| 250 | */ |
| 251 | if (res) { |
| 252 | ubi_dbg("Skipping bad or unreadable block %d", pnum); |
| 253 | vh->magic = 0; |
| 254 | generic_set_bit(pnum, ubi->corrupt); |
| 255 | return res; |
| 256 | } |
| 257 | |
| 258 | /* Magic number available ? */ |
| 259 | magic = be32_to_cpu(vh->magic); |
| 260 | if (magic != UBI_VID_HDR_MAGIC) { |
| 261 | generic_set_bit(pnum, ubi->corrupt); |
| 262 | if (magic == 0xffffffff) |
| 263 | return UBI_IO_FF; |
| 264 | ubi_msg("Bad magic in block 0%d %08x", pnum, magic); |
| 265 | return UBI_IO_BAD_HDR; |
| 266 | } |
| 267 | |
| 268 | /* Header CRC correct ? */ |
| 269 | if (crc32(UBI_CRC32_INIT, vh, UBI_VID_HDR_SIZE_CRC) != |
| 270 | be32_to_cpu(vh->hdr_crc)) { |
| 271 | ubi_msg("Bad CRC in block 0%d", pnum); |
| 272 | generic_set_bit(pnum, ubi->corrupt); |
| 273 | return UBI_IO_BAD_HDR; |
| 274 | } |
| 275 | |
| 276 | ubi_dbg("RV: pnum: %i sqnum %llu", pnum, be64_to_cpu(vh->sqnum)); |
| 277 | |
| 278 | return 0; |
| 279 | } |
| 280 | |
| 281 | static int ubi_rescan_fm_vid_hdr(struct ubi_scan_info *ubi, |
| 282 | struct ubi_vid_hdr *vh, |
| 283 | u32 fm_pnum, u32 fm_vol_id, u32 fm_lnum) |
| 284 | { |
| 285 | int res; |
| 286 | |
| 287 | if (ubi_io_is_bad(ubi, fm_pnum)) |
| 288 | return -EINVAL; |
| 289 | |
| 290 | res = ubi_io_read_vid_hdr(ubi, fm_pnum, vh, 0); |
| 291 | if (!res) { |
| 292 | /* Check volume id, volume type and lnum */ |
| 293 | if (be32_to_cpu(vh->vol_id) == fm_vol_id && |
| 294 | vh->vol_type == UBI_VID_STATIC && |
| 295 | be32_to_cpu(vh->lnum) == fm_lnum) |
| 296 | return 0; |
| 297 | ubi_dbg("RS: PEB %u vol: %u : %u typ %u lnum %u %u", |
| 298 | fm_pnum, fm_vol_id, vh->vol_type, |
| 299 | be32_to_cpu(vh->vol_id), |
| 300 | fm_lnum, be32_to_cpu(vh->lnum)); |
| 301 | } |
| 302 | return res; |
| 303 | } |
| 304 | |
| 305 | /* Insert the logic block into the volume info */ |
| 306 | static int ubi_add_peb_to_vol(struct ubi_scan_info *ubi, |
| 307 | struct ubi_vid_hdr *vh, u32 vol_id, |
| 308 | u32 pnum, u32 lnum) |
| 309 | { |
| 310 | struct ubi_vol_info *vi = ubi->volinfo + vol_id; |
| 311 | u32 *ltp; |
| 312 | |
| 313 | /* |
| 314 | * If the volume is larger than expected, yell and give up :( |
| 315 | */ |
| 316 | if (lnum >= UBI_MAX_VOL_LEBS) { |
| 317 | ubi_warn("Vol: %u LEB %d > %d", vol_id, lnum, UBI_MAX_VOL_LEBS); |
| 318 | return -EINVAL; |
| 319 | } |
| 320 | |
| 321 | ubi_dbg("SC: Add PEB %u to Vol %u as LEB %u fnd %d sc %d", |
| 322 | pnum, vol_id, lnum, !!test_bit(lnum, vi->found), |
| 323 | !!test_bit(pnum, ubi->scanned)); |
| 324 | |
| 325 | /* Points to the translation entry */ |
| 326 | ltp = vi->lebs_to_pebs + lnum; |
| 327 | |
| 328 | /* If the block is already assigned, check sqnum */ |
| 329 | if (__test_and_set_bit(lnum, vi->found)) { |
| 330 | u32 cur_pnum = *ltp; |
| 331 | struct ubi_vid_hdr *cur = ubi->blockinfo + cur_pnum; |
| 332 | |
| 333 | /* |
| 334 | * If the current block hase not yet been scanned, we |
| 335 | * need to do that. The other block might be stale or |
| 336 | * the current block corrupted and the FM not yet |
| 337 | * updated. |
| 338 | */ |
| 339 | if (!test_bit(cur_pnum, ubi->scanned)) { |
| 340 | /* |
| 341 | * If the scan fails, we use the valid block |
| 342 | */ |
| 343 | if (ubi_rescan_fm_vid_hdr(ubi, cur, cur_pnum, vol_id, |
| 344 | lnum)) { |
| 345 | *ltp = pnum; |
| 346 | return 0; |
| 347 | } |
| 348 | } |
| 349 | |
| 350 | /* |
| 351 | * Should not happen .... |
| 352 | */ |
| 353 | if (test_bit(cur_pnum, ubi->corrupt)) { |
| 354 | *ltp = pnum; |
| 355 | return 0; |
| 356 | } |
| 357 | |
| 358 | ubi_dbg("Vol %u LEB %u PEB %u->sqnum %llu NPEB %u->sqnum %llu", |
| 359 | vol_id, lnum, cur_pnum, be64_to_cpu(cur->sqnum), pnum, |
| 360 | be64_to_cpu(vh->sqnum)); |
| 361 | |
| 362 | /* |
| 363 | * Compare sqnum and take the newer one |
| 364 | */ |
| 365 | if (be64_to_cpu(cur->sqnum) < be64_to_cpu(vh->sqnum)) |
| 366 | *ltp = pnum; |
| 367 | } else { |
| 368 | *ltp = pnum; |
| 369 | if (lnum > vi->last_block) |
| 370 | vi->last_block = lnum; |
| 371 | } |
| 372 | |
| 373 | return 0; |
| 374 | } |
| 375 | |
| 376 | static int ubi_scan_vid_hdr(struct ubi_scan_info *ubi, struct ubi_vid_hdr *vh, |
| 377 | u32 pnum) |
| 378 | { |
| 379 | u32 vol_id, lnum; |
| 380 | int res; |
| 381 | |
| 382 | if (ubi_io_is_bad(ubi, pnum)) |
| 383 | return -EINVAL; |
| 384 | |
| 385 | res = ubi_io_read_vid_hdr(ubi, pnum, vh, 0); |
| 386 | if (res) |
| 387 | return res; |
| 388 | |
| 389 | /* Get volume id */ |
| 390 | vol_id = be32_to_cpu(vh->vol_id); |
| 391 | |
| 392 | /* If this is the fastmap anchor, return right away */ |
| 393 | if (vol_id == UBI_FM_SB_VOLUME_ID) |
| 394 | return ubi->fm_enabled ? UBI_FASTMAP_ANCHOR : 0; |
| 395 | |
Hamish Guthrie | 3ce740d | 2019-05-15 15:15:59 +0200 | [diff] [blame] | 396 | #ifdef CONFIG_SPL_UBI_LOAD_BY_VOLNAME |
| 397 | /* If this is a UBI volume table, read it and return */ |
| 398 | if (vol_id == UBI_LAYOUT_VOLUME_ID && !ubi->vtbl_valid) { |
| 399 | res = ubi_read_volume_table(ubi, pnum); |
| 400 | return res; |
| 401 | } |
| 402 | #endif |
| 403 | |
Thomas Gleixner | 820d24d | 2016-07-12 20:28:12 +0200 | [diff] [blame] | 404 | /* We only care about static volumes with an id < UBI_SPL_VOL_IDS */ |
| 405 | if (vol_id >= UBI_SPL_VOL_IDS || vh->vol_type != UBI_VID_STATIC) |
| 406 | return 0; |
| 407 | |
Hamish Guthrie | 3ce740d | 2019-05-15 15:15:59 +0200 | [diff] [blame] | 408 | #ifndef CONFIG_SPL_UBI_LOAD_BY_VOLNAME |
Thomas Gleixner | 820d24d | 2016-07-12 20:28:12 +0200 | [diff] [blame] | 409 | /* We are only interested in the volumes to load */ |
| 410 | if (!test_bit(vol_id, ubi->toload)) |
| 411 | return 0; |
Hamish Guthrie | 3ce740d | 2019-05-15 15:15:59 +0200 | [diff] [blame] | 412 | #endif |
Thomas Gleixner | 820d24d | 2016-07-12 20:28:12 +0200 | [diff] [blame] | 413 | lnum = be32_to_cpu(vh->lnum); |
| 414 | return ubi_add_peb_to_vol(ubi, vh, vol_id, pnum, lnum); |
| 415 | } |
| 416 | |
| 417 | static int assign_aeb_to_av(struct ubi_scan_info *ubi, u32 pnum, u32 lnum, |
| 418 | u32 vol_id, u32 vol_type, u32 used) |
| 419 | { |
| 420 | struct ubi_vid_hdr *vh; |
| 421 | |
| 422 | if (ubi_io_is_bad(ubi, pnum)) |
| 423 | return -EINVAL; |
| 424 | |
| 425 | ubi->fastmap_pebs++; |
| 426 | |
Hamish Guthrie | 3ce740d | 2019-05-15 15:15:59 +0200 | [diff] [blame] | 427 | #ifndef CONFIG_SPL_UBI_LOAD_BY_VOLNAME |
Thomas Gleixner | 820d24d | 2016-07-12 20:28:12 +0200 | [diff] [blame] | 428 | if (vol_id >= UBI_SPL_VOL_IDS || vol_type != UBI_STATIC_VOLUME) |
| 429 | return 0; |
| 430 | |
| 431 | /* We are only interested in the volumes to load */ |
| 432 | if (!test_bit(vol_id, ubi->toload)) |
| 433 | return 0; |
Hamish Guthrie | 3ce740d | 2019-05-15 15:15:59 +0200 | [diff] [blame] | 434 | #endif |
Thomas Gleixner | 820d24d | 2016-07-12 20:28:12 +0200 | [diff] [blame] | 435 | vh = ubi->blockinfo + pnum; |
| 436 | |
| 437 | return ubi_scan_vid_hdr(ubi, vh, pnum); |
| 438 | } |
| 439 | |
| 440 | static int scan_pool(struct ubi_scan_info *ubi, __be32 *pebs, int pool_size) |
| 441 | { |
| 442 | struct ubi_vid_hdr *vh; |
| 443 | u32 pnum; |
| 444 | int i; |
| 445 | |
| 446 | ubi_dbg("Scanning pool size: %d", pool_size); |
| 447 | |
| 448 | for (i = 0; i < pool_size; i++) { |
| 449 | pnum = be32_to_cpu(pebs[i]); |
| 450 | |
| 451 | if (ubi_io_is_bad(ubi, pnum)) { |
| 452 | ubi_err("FM: Bad PEB in fastmap pool! %u", pnum); |
| 453 | return UBI_BAD_FASTMAP; |
| 454 | } |
| 455 | |
| 456 | vh = ubi->blockinfo + pnum; |
| 457 | /* |
| 458 | * We allow the scan to fail here. The loader will notice |
| 459 | * and look for a replacement. |
| 460 | */ |
| 461 | ubi_scan_vid_hdr(ubi, vh, pnum); |
| 462 | } |
| 463 | return 0; |
| 464 | } |
| 465 | |
| 466 | /* |
| 467 | * Fastmap code is stolen from Linux kernel and this stub structure is used |
| 468 | * to make it happy. |
| 469 | */ |
| 470 | struct ubi_attach_info { |
| 471 | int i; |
| 472 | }; |
| 473 | |
| 474 | static int ubi_attach_fastmap(struct ubi_scan_info *ubi, |
| 475 | struct ubi_attach_info *ai, |
| 476 | struct ubi_fastmap_layout *fm) |
| 477 | { |
| 478 | struct ubi_fm_hdr *fmhdr; |
| 479 | struct ubi_fm_scan_pool *fmpl1, *fmpl2; |
| 480 | struct ubi_fm_ec *fmec; |
| 481 | struct ubi_fm_volhdr *fmvhdr; |
| 482 | struct ubi_fm_eba *fm_eba; |
| 483 | int ret, i, j, pool_size, wl_pool_size; |
| 484 | size_t fm_pos = 0, fm_size = ubi->fm_size; |
| 485 | void *fm_raw = ubi->fm_buf; |
| 486 | |
| 487 | memset(ubi->fm_used, 0, sizeof(ubi->fm_used)); |
| 488 | |
| 489 | fm_pos += sizeof(struct ubi_fm_sb); |
| 490 | if (fm_pos >= fm_size) |
| 491 | goto fail_bad; |
| 492 | |
| 493 | fmhdr = (struct ubi_fm_hdr *)(fm_raw + fm_pos); |
| 494 | fm_pos += sizeof(*fmhdr); |
| 495 | if (fm_pos >= fm_size) |
| 496 | goto fail_bad; |
| 497 | |
| 498 | if (be32_to_cpu(fmhdr->magic) != UBI_FM_HDR_MAGIC) { |
| 499 | ubi_err("bad fastmap header magic: 0x%x, expected: 0x%x", |
| 500 | be32_to_cpu(fmhdr->magic), UBI_FM_HDR_MAGIC); |
| 501 | goto fail_bad; |
| 502 | } |
| 503 | |
| 504 | fmpl1 = (struct ubi_fm_scan_pool *)(fm_raw + fm_pos); |
| 505 | fm_pos += sizeof(*fmpl1); |
| 506 | if (fm_pos >= fm_size) |
| 507 | goto fail_bad; |
| 508 | if (be32_to_cpu(fmpl1->magic) != UBI_FM_POOL_MAGIC) { |
| 509 | ubi_err("bad fastmap pool magic: 0x%x, expected: 0x%x", |
| 510 | be32_to_cpu(fmpl1->magic), UBI_FM_POOL_MAGIC); |
| 511 | goto fail_bad; |
| 512 | } |
| 513 | |
| 514 | fmpl2 = (struct ubi_fm_scan_pool *)(fm_raw + fm_pos); |
| 515 | fm_pos += sizeof(*fmpl2); |
| 516 | if (fm_pos >= fm_size) |
| 517 | goto fail_bad; |
| 518 | if (be32_to_cpu(fmpl2->magic) != UBI_FM_POOL_MAGIC) { |
| 519 | ubi_err("bad fastmap pool magic: 0x%x, expected: 0x%x", |
| 520 | be32_to_cpu(fmpl2->magic), UBI_FM_POOL_MAGIC); |
| 521 | goto fail_bad; |
| 522 | } |
| 523 | |
| 524 | pool_size = be16_to_cpu(fmpl1->size); |
| 525 | wl_pool_size = be16_to_cpu(fmpl2->size); |
| 526 | fm->max_pool_size = be16_to_cpu(fmpl1->max_size); |
| 527 | fm->max_wl_pool_size = be16_to_cpu(fmpl2->max_size); |
| 528 | |
| 529 | if (pool_size > UBI_FM_MAX_POOL_SIZE || pool_size < 0) { |
| 530 | ubi_err("bad pool size: %i", pool_size); |
| 531 | goto fail_bad; |
| 532 | } |
| 533 | |
| 534 | if (wl_pool_size > UBI_FM_MAX_POOL_SIZE || wl_pool_size < 0) { |
| 535 | ubi_err("bad WL pool size: %i", wl_pool_size); |
| 536 | goto fail_bad; |
| 537 | } |
| 538 | |
| 539 | if (fm->max_pool_size > UBI_FM_MAX_POOL_SIZE || |
| 540 | fm->max_pool_size < 0) { |
| 541 | ubi_err("bad maximal pool size: %i", fm->max_pool_size); |
| 542 | goto fail_bad; |
| 543 | } |
| 544 | |
| 545 | if (fm->max_wl_pool_size > UBI_FM_MAX_POOL_SIZE || |
| 546 | fm->max_wl_pool_size < 0) { |
| 547 | ubi_err("bad maximal WL pool size: %i", fm->max_wl_pool_size); |
| 548 | goto fail_bad; |
| 549 | } |
| 550 | |
| 551 | /* read EC values from free list */ |
| 552 | for (i = 0; i < be32_to_cpu(fmhdr->free_peb_count); i++) { |
| 553 | fmec = (struct ubi_fm_ec *)(fm_raw + fm_pos); |
| 554 | fm_pos += sizeof(*fmec); |
| 555 | if (fm_pos >= fm_size) |
| 556 | goto fail_bad; |
| 557 | } |
| 558 | |
| 559 | /* read EC values from used list */ |
| 560 | for (i = 0; i < be32_to_cpu(fmhdr->used_peb_count); i++) { |
| 561 | fmec = (struct ubi_fm_ec *)(fm_raw + fm_pos); |
| 562 | fm_pos += sizeof(*fmec); |
| 563 | if (fm_pos >= fm_size) |
| 564 | goto fail_bad; |
| 565 | |
| 566 | generic_set_bit(be32_to_cpu(fmec->pnum), ubi->fm_used); |
| 567 | } |
| 568 | |
| 569 | /* read EC values from scrub list */ |
| 570 | for (i = 0; i < be32_to_cpu(fmhdr->scrub_peb_count); i++) { |
| 571 | fmec = (struct ubi_fm_ec *)(fm_raw + fm_pos); |
| 572 | fm_pos += sizeof(*fmec); |
| 573 | if (fm_pos >= fm_size) |
| 574 | goto fail_bad; |
| 575 | } |
| 576 | |
| 577 | /* read EC values from erase list */ |
| 578 | for (i = 0; i < be32_to_cpu(fmhdr->erase_peb_count); i++) { |
| 579 | fmec = (struct ubi_fm_ec *)(fm_raw + fm_pos); |
| 580 | fm_pos += sizeof(*fmec); |
| 581 | if (fm_pos >= fm_size) |
| 582 | goto fail_bad; |
| 583 | } |
| 584 | |
| 585 | /* Iterate over all volumes and read their EBA table */ |
| 586 | for (i = 0; i < be32_to_cpu(fmhdr->vol_count); i++) { |
| 587 | u32 vol_id, vol_type, used, reserved; |
| 588 | |
| 589 | fmvhdr = (struct ubi_fm_volhdr *)(fm_raw + fm_pos); |
| 590 | fm_pos += sizeof(*fmvhdr); |
| 591 | if (fm_pos >= fm_size) |
| 592 | goto fail_bad; |
| 593 | |
| 594 | if (be32_to_cpu(fmvhdr->magic) != UBI_FM_VHDR_MAGIC) { |
| 595 | ubi_err("bad fastmap vol header magic: 0x%x, " \ |
| 596 | "expected: 0x%x", |
| 597 | be32_to_cpu(fmvhdr->magic), UBI_FM_VHDR_MAGIC); |
| 598 | goto fail_bad; |
| 599 | } |
| 600 | |
| 601 | vol_id = be32_to_cpu(fmvhdr->vol_id); |
| 602 | vol_type = fmvhdr->vol_type; |
| 603 | used = be32_to_cpu(fmvhdr->used_ebs); |
| 604 | |
| 605 | fm_eba = (struct ubi_fm_eba *)(fm_raw + fm_pos); |
| 606 | fm_pos += sizeof(*fm_eba); |
| 607 | fm_pos += (sizeof(__be32) * be32_to_cpu(fm_eba->reserved_pebs)); |
| 608 | if (fm_pos >= fm_size) |
| 609 | goto fail_bad; |
| 610 | |
| 611 | if (be32_to_cpu(fm_eba->magic) != UBI_FM_EBA_MAGIC) { |
| 612 | ubi_err("bad fastmap EBA header magic: 0x%x, " \ |
| 613 | "expected: 0x%x", |
| 614 | be32_to_cpu(fm_eba->magic), UBI_FM_EBA_MAGIC); |
| 615 | goto fail_bad; |
| 616 | } |
| 617 | |
| 618 | reserved = be32_to_cpu(fm_eba->reserved_pebs); |
| 619 | ubi_dbg("FA: vol %u used %u res: %u", vol_id, used, reserved); |
| 620 | for (j = 0; j < reserved; j++) { |
| 621 | int pnum = be32_to_cpu(fm_eba->pnum[j]); |
| 622 | |
| 623 | if ((int)be32_to_cpu(fm_eba->pnum[j]) < 0) |
| 624 | continue; |
| 625 | |
| 626 | if (!__test_and_clear_bit(pnum, ubi->fm_used)) |
| 627 | continue; |
| 628 | |
| 629 | /* |
| 630 | * We only handle static volumes so used_ebs |
| 631 | * needs to be handed in. And we do not assign |
| 632 | * the reserved blocks |
| 633 | */ |
| 634 | if (j >= used) |
| 635 | continue; |
| 636 | |
| 637 | ret = assign_aeb_to_av(ubi, pnum, j, vol_id, |
| 638 | vol_type, used); |
| 639 | if (!ret) |
| 640 | continue; |
| 641 | |
| 642 | /* |
| 643 | * Nasty: The fastmap claims that the volume |
| 644 | * has one block more than it, but that block |
| 645 | * is always empty and the other blocks have |
| 646 | * the correct number of total LEBs in the |
| 647 | * headers. Deal with it. |
| 648 | */ |
| 649 | if (ret != UBI_IO_FF && j != used - 1) |
| 650 | goto fail_bad; |
| 651 | ubi_dbg("FA: Vol: %u Ignoring empty LEB %d of %d", |
| 652 | vol_id, j, used); |
| 653 | } |
| 654 | } |
| 655 | |
| 656 | ret = scan_pool(ubi, fmpl1->pebs, pool_size); |
| 657 | if (ret) |
| 658 | goto fail; |
| 659 | |
| 660 | ret = scan_pool(ubi, fmpl2->pebs, wl_pool_size); |
| 661 | if (ret) |
| 662 | goto fail; |
| 663 | |
| 664 | #ifdef CHECKME |
| 665 | /* |
| 666 | * If fastmap is leaking PEBs (must not happen), raise a |
| 667 | * fat warning and fall back to scanning mode. |
| 668 | * We do this here because in ubi_wl_init() it's too late |
| 669 | * and we cannot fall back to scanning. |
| 670 | */ |
| 671 | if (WARN_ON(count_fastmap_pebs(ai) != ubi->peb_count - |
| 672 | ai->bad_peb_count - fm->used_blocks)) |
| 673 | goto fail_bad; |
| 674 | #endif |
| 675 | |
| 676 | return 0; |
| 677 | |
| 678 | fail_bad: |
| 679 | ret = UBI_BAD_FASTMAP; |
| 680 | fail: |
| 681 | return ret; |
| 682 | } |
| 683 | |
| 684 | static int ubi_scan_fastmap(struct ubi_scan_info *ubi, |
| 685 | struct ubi_attach_info *ai, |
| 686 | int fm_anchor) |
| 687 | { |
| 688 | struct ubi_fm_sb *fmsb, *fmsb2; |
| 689 | struct ubi_vid_hdr *vh; |
| 690 | struct ubi_fastmap_layout *fm; |
| 691 | int i, used_blocks, pnum, ret = 0; |
| 692 | size_t fm_size; |
| 693 | __be32 crc, tmp_crc; |
| 694 | unsigned long long sqnum = 0; |
| 695 | |
| 696 | fmsb = &ubi->fm_sb; |
| 697 | fm = &ubi->fm_layout; |
| 698 | |
| 699 | ret = ubi_io_read(ubi, fmsb, fm_anchor, ubi->leb_start, sizeof(*fmsb)); |
| 700 | if (ret && ret != UBI_IO_BITFLIPS) |
| 701 | goto free_fm_sb; |
| 702 | else if (ret == UBI_IO_BITFLIPS) |
| 703 | fm->to_be_tortured[0] = 1; |
| 704 | |
| 705 | if (be32_to_cpu(fmsb->magic) != UBI_FM_SB_MAGIC) { |
| 706 | ubi_err("bad super block magic: 0x%x, expected: 0x%x", |
| 707 | be32_to_cpu(fmsb->magic), UBI_FM_SB_MAGIC); |
| 708 | ret = UBI_BAD_FASTMAP; |
| 709 | goto free_fm_sb; |
| 710 | } |
| 711 | |
| 712 | if (fmsb->version != UBI_FM_FMT_VERSION) { |
| 713 | ubi_err("bad fastmap version: %i, expected: %i", |
| 714 | fmsb->version, UBI_FM_FMT_VERSION); |
| 715 | ret = UBI_BAD_FASTMAP; |
| 716 | goto free_fm_sb; |
| 717 | } |
| 718 | |
| 719 | used_blocks = be32_to_cpu(fmsb->used_blocks); |
| 720 | if (used_blocks > UBI_FM_MAX_BLOCKS || used_blocks < 1) { |
| 721 | ubi_err("number of fastmap blocks is invalid: %i", used_blocks); |
| 722 | ret = UBI_BAD_FASTMAP; |
| 723 | goto free_fm_sb; |
| 724 | } |
| 725 | |
| 726 | fm_size = ubi->leb_size * used_blocks; |
| 727 | if (fm_size != ubi->fm_size) { |
| 728 | ubi_err("bad fastmap size: %zi, expected: %zi", fm_size, |
| 729 | ubi->fm_size); |
| 730 | ret = UBI_BAD_FASTMAP; |
| 731 | goto free_fm_sb; |
| 732 | } |
| 733 | |
| 734 | vh = &ubi->fm_vh; |
| 735 | |
| 736 | for (i = 0; i < used_blocks; i++) { |
| 737 | pnum = be32_to_cpu(fmsb->block_loc[i]); |
| 738 | |
| 739 | if (ubi_io_is_bad(ubi, pnum)) { |
| 740 | ret = UBI_BAD_FASTMAP; |
| 741 | goto free_hdr; |
| 742 | } |
| 743 | |
| 744 | #ifdef LATER |
| 745 | int image_seq; |
| 746 | ret = ubi_io_read_ec_hdr(ubi, pnum, ech, 0); |
| 747 | if (ret && ret != UBI_IO_BITFLIPS) { |
| 748 | ubi_err("unable to read fastmap block# %i EC (PEB: %i)", |
| 749 | i, pnum); |
| 750 | if (ret > 0) |
| 751 | ret = UBI_BAD_FASTMAP; |
| 752 | goto free_hdr; |
| 753 | } else if (ret == UBI_IO_BITFLIPS) |
| 754 | fm->to_be_tortured[i] = 1; |
| 755 | |
| 756 | image_seq = be32_to_cpu(ech->image_seq); |
| 757 | if (!ubi->image_seq) |
| 758 | ubi->image_seq = image_seq; |
| 759 | /* |
| 760 | * Older UBI implementations have image_seq set to zero, so |
| 761 | * we shouldn't fail if image_seq == 0. |
| 762 | */ |
| 763 | if (image_seq && (image_seq != ubi->image_seq)) { |
| 764 | ubi_err("wrong image seq:%d instead of %d", |
| 765 | be32_to_cpu(ech->image_seq), ubi->image_seq); |
| 766 | ret = UBI_BAD_FASTMAP; |
| 767 | goto free_hdr; |
| 768 | } |
| 769 | #endif |
| 770 | ret = ubi_io_read_vid_hdr(ubi, pnum, vh, 0); |
| 771 | if (ret && ret != UBI_IO_BITFLIPS) { |
| 772 | ubi_err("unable to read fastmap block# %i (PEB: %i)", |
| 773 | i, pnum); |
| 774 | goto free_hdr; |
| 775 | } |
| 776 | |
| 777 | /* |
| 778 | * Mainline code rescans the anchor header. We've done |
| 779 | * that already so we merily copy it over. |
| 780 | */ |
| 781 | if (pnum == fm_anchor) |
| 782 | memcpy(vh, ubi->blockinfo + pnum, sizeof(*fm)); |
| 783 | |
| 784 | if (i == 0) { |
| 785 | if (be32_to_cpu(vh->vol_id) != UBI_FM_SB_VOLUME_ID) { |
| 786 | ubi_err("bad fastmap anchor vol_id: 0x%x," \ |
| 787 | " expected: 0x%x", |
| 788 | be32_to_cpu(vh->vol_id), |
| 789 | UBI_FM_SB_VOLUME_ID); |
| 790 | ret = UBI_BAD_FASTMAP; |
| 791 | goto free_hdr; |
| 792 | } |
| 793 | } else { |
| 794 | if (be32_to_cpu(vh->vol_id) != UBI_FM_DATA_VOLUME_ID) { |
| 795 | ubi_err("bad fastmap data vol_id: 0x%x," \ |
| 796 | " expected: 0x%x", |
| 797 | be32_to_cpu(vh->vol_id), |
| 798 | UBI_FM_DATA_VOLUME_ID); |
| 799 | ret = UBI_BAD_FASTMAP; |
| 800 | goto free_hdr; |
| 801 | } |
| 802 | } |
| 803 | |
| 804 | if (sqnum < be64_to_cpu(vh->sqnum)) |
| 805 | sqnum = be64_to_cpu(vh->sqnum); |
| 806 | |
| 807 | ret = ubi_io_read(ubi, ubi->fm_buf + (ubi->leb_size * i), pnum, |
| 808 | ubi->leb_start, ubi->leb_size); |
| 809 | if (ret && ret != UBI_IO_BITFLIPS) { |
| 810 | ubi_err("unable to read fastmap block# %i (PEB: %i, " \ |
| 811 | "err: %i)", i, pnum, ret); |
| 812 | goto free_hdr; |
| 813 | } |
| 814 | } |
| 815 | |
| 816 | fmsb2 = (struct ubi_fm_sb *)(ubi->fm_buf); |
| 817 | tmp_crc = be32_to_cpu(fmsb2->data_crc); |
| 818 | fmsb2->data_crc = 0; |
| 819 | crc = crc32(UBI_CRC32_INIT, ubi->fm_buf, fm_size); |
| 820 | if (crc != tmp_crc) { |
| 821 | ubi_err("fastmap data CRC is invalid"); |
| 822 | ubi_err("CRC should be: 0x%x, calc: 0x%x", tmp_crc, crc); |
| 823 | ret = UBI_BAD_FASTMAP; |
| 824 | goto free_hdr; |
| 825 | } |
| 826 | |
| 827 | fmsb2->sqnum = sqnum; |
| 828 | |
| 829 | fm->used_blocks = used_blocks; |
| 830 | |
| 831 | ret = ubi_attach_fastmap(ubi, ai, fm); |
| 832 | if (ret) { |
| 833 | if (ret > 0) |
| 834 | ret = UBI_BAD_FASTMAP; |
| 835 | goto free_hdr; |
| 836 | } |
| 837 | |
| 838 | ubi->fm = fm; |
| 839 | ubi->fm_pool.max_size = ubi->fm->max_pool_size; |
| 840 | ubi->fm_wl_pool.max_size = ubi->fm->max_wl_pool_size; |
| 841 | ubi_msg("attached by fastmap %uMB %u blocks", |
| 842 | ubi->fsize_mb, ubi->peb_count); |
| 843 | ubi_dbg("fastmap pool size: %d", ubi->fm_pool.max_size); |
| 844 | ubi_dbg("fastmap WL pool size: %d", ubi->fm_wl_pool.max_size); |
| 845 | |
| 846 | out: |
| 847 | if (ret) |
| 848 | ubi_err("Attach by fastmap failed, doing a full scan!"); |
| 849 | return ret; |
| 850 | |
| 851 | free_hdr: |
| 852 | free_fm_sb: |
| 853 | goto out; |
| 854 | } |
| 855 | |
| 856 | /* |
| 857 | * Scan the flash and attempt to attach via fastmap |
| 858 | */ |
| 859 | static void ipl_scan(struct ubi_scan_info *ubi) |
| 860 | { |
| 861 | unsigned int pnum; |
| 862 | int res; |
| 863 | |
| 864 | /* |
| 865 | * Scan first for the fastmap super block |
| 866 | */ |
| 867 | for (pnum = 0; pnum < UBI_FM_MAX_START; pnum++) { |
| 868 | res = ubi_scan_vid_hdr(ubi, ubi->blockinfo + pnum, pnum); |
| 869 | /* |
| 870 | * We ignore errors here as we are meriliy scanning |
| 871 | * the headers. |
| 872 | */ |
| 873 | if (res != UBI_FASTMAP_ANCHOR) |
| 874 | continue; |
| 875 | |
| 876 | /* |
| 877 | * If fastmap is disabled, continue scanning. This |
| 878 | * might happen because the previous attempt failed or |
| 879 | * the caller disabled it right away. |
| 880 | */ |
| 881 | if (!ubi->fm_enabled) |
| 882 | continue; |
| 883 | |
| 884 | /* |
| 885 | * Try to attach the fastmap, if that fails continue |
| 886 | * scanning. |
| 887 | */ |
| 888 | if (!ubi_scan_fastmap(ubi, NULL, pnum)) |
| 889 | return; |
| 890 | /* |
| 891 | * Fastmap failed. Clear everything we have and start |
| 892 | * over. We are paranoid and do not trust anything. |
| 893 | */ |
| 894 | memset(ubi->volinfo, 0, sizeof(ubi->volinfo)); |
| 895 | pnum = 0; |
| 896 | break; |
| 897 | } |
| 898 | |
| 899 | /* |
| 900 | * Continue scanning, ignore errors, we might find what we are |
| 901 | * looking for, |
| 902 | */ |
| 903 | for (; pnum < ubi->peb_count; pnum++) |
| 904 | ubi_scan_vid_hdr(ubi, ubi->blockinfo + pnum, pnum); |
| 905 | } |
| 906 | |
| 907 | /* |
| 908 | * Load a logical block of a volume into memory |
| 909 | */ |
| 910 | static int ubi_load_block(struct ubi_scan_info *ubi, uint8_t *laddr, |
| 911 | struct ubi_vol_info *vi, u32 vol_id, u32 lnum, |
| 912 | u32 last) |
| 913 | { |
| 914 | struct ubi_vid_hdr *vh, *vrepl; |
| 915 | u32 pnum, crc, dlen; |
| 916 | |
| 917 | retry: |
| 918 | /* |
| 919 | * If this is a fastmap run, we try to rescan full, otherwise |
| 920 | * we simply give up. |
| 921 | */ |
| 922 | if (!test_bit(lnum, vi->found)) { |
| 923 | ubi_warn("LEB %d of %d is missing", lnum, last); |
| 924 | return -EINVAL; |
| 925 | } |
| 926 | |
| 927 | pnum = vi->lebs_to_pebs[lnum]; |
| 928 | |
| 929 | ubi_dbg("Load vol %u LEB %u PEB %u", vol_id, lnum, pnum); |
| 930 | |
| 931 | if (ubi_io_is_bad(ubi, pnum)) { |
| 932 | ubi_warn("Corrupted mapping block %d PB %d\n", lnum, pnum); |
| 933 | return -EINVAL; |
| 934 | } |
| 935 | |
| 936 | if (test_bit(pnum, ubi->corrupt)) |
| 937 | goto find_other; |
| 938 | |
| 939 | /* |
| 940 | * Lets try to read that block |
| 941 | */ |
| 942 | vh = ubi->blockinfo + pnum; |
| 943 | |
| 944 | if (!test_bit(pnum, ubi->scanned)) { |
| 945 | ubi_warn("Vol: %u LEB %u PEB %u not yet scanned", vol_id, |
| 946 | lnum, pnum); |
| 947 | if (ubi_rescan_fm_vid_hdr(ubi, vh, pnum, vol_id, lnum)) |
| 948 | goto find_other; |
| 949 | } |
| 950 | |
| 951 | /* |
| 952 | * Check, if the total number of blocks is correct |
| 953 | */ |
| 954 | if (be32_to_cpu(vh->used_ebs) != last) { |
Vagrant Cascadian | adee399 | 2021-12-21 13:06:53 -0800 | [diff] [blame] | 955 | ubi_dbg("Block count mismatch."); |
Thomas Gleixner | 820d24d | 2016-07-12 20:28:12 +0200 | [diff] [blame] | 956 | ubi_dbg("vh->used_ebs: %d nrblocks: %d", |
| 957 | be32_to_cpu(vh->used_ebs), last); |
| 958 | generic_set_bit(pnum, ubi->corrupt); |
| 959 | goto find_other; |
| 960 | } |
| 961 | |
| 962 | /* |
| 963 | * Get the data length of this block. |
| 964 | */ |
| 965 | dlen = be32_to_cpu(vh->data_size); |
| 966 | |
| 967 | /* |
| 968 | * Read the data into RAM. We ignore the return value |
| 969 | * here as the only thing which might go wrong are |
| 970 | * bitflips. Try nevertheless. |
| 971 | */ |
| 972 | ubi_io_read(ubi, laddr, pnum, ubi->leb_start, dlen); |
| 973 | |
| 974 | /* Calculate CRC over the data */ |
| 975 | crc = crc32(UBI_CRC32_INIT, laddr, dlen); |
| 976 | |
| 977 | if (crc != be32_to_cpu(vh->data_crc)) { |
| 978 | ubi_warn("Vol: %u LEB %u PEB %u data CRC failure", vol_id, |
| 979 | lnum, pnum); |
| 980 | generic_set_bit(pnum, ubi->corrupt); |
| 981 | goto find_other; |
| 982 | } |
| 983 | |
| 984 | /* We are good. Return the data length we read */ |
| 985 | return dlen; |
| 986 | |
| 987 | find_other: |
| 988 | ubi_dbg("Find replacement for LEB %u PEB %u", lnum, pnum); |
| 989 | generic_clear_bit(lnum, vi->found); |
| 990 | vrepl = NULL; |
| 991 | |
| 992 | for (pnum = 0; pnum < ubi->peb_count; pnum++) { |
| 993 | struct ubi_vid_hdr *tmp = ubi->blockinfo + pnum; |
| 994 | u32 t_vol_id = be32_to_cpu(tmp->vol_id); |
| 995 | u32 t_lnum = be32_to_cpu(tmp->lnum); |
| 996 | |
| 997 | if (test_bit(pnum, ubi->corrupt)) |
| 998 | continue; |
| 999 | |
| 1000 | if (t_vol_id != vol_id || t_lnum != lnum) |
| 1001 | continue; |
| 1002 | |
| 1003 | if (!test_bit(pnum, ubi->scanned)) { |
| 1004 | ubi_warn("Vol: %u LEB %u PEB %u not yet scanned", |
| 1005 | vol_id, lnum, pnum); |
| 1006 | if (ubi_rescan_fm_vid_hdr(ubi, tmp, pnum, vol_id, lnum)) |
| 1007 | continue; |
| 1008 | } |
| 1009 | |
| 1010 | /* |
| 1011 | * We found one. If its the first, assign it otherwise |
| 1012 | * compare the sqnum |
| 1013 | */ |
| 1014 | generic_set_bit(lnum, vi->found); |
| 1015 | |
| 1016 | if (!vrepl) { |
| 1017 | vrepl = tmp; |
| 1018 | continue; |
| 1019 | } |
| 1020 | |
| 1021 | if (be64_to_cpu(vrepl->sqnum) < be64_to_cpu(tmp->sqnum)) |
| 1022 | vrepl = tmp; |
| 1023 | } |
| 1024 | |
| 1025 | if (vrepl) { |
| 1026 | /* Update the vi table */ |
| 1027 | pnum = vrepl - ubi->blockinfo; |
| 1028 | vi->lebs_to_pebs[lnum] = pnum; |
| 1029 | ubi_dbg("Trying PEB %u for LEB %u", pnum, lnum); |
| 1030 | vh = vrepl; |
| 1031 | } |
| 1032 | goto retry; |
| 1033 | } |
| 1034 | |
| 1035 | /* |
| 1036 | * Load a volume into RAM |
| 1037 | */ |
| 1038 | static int ipl_load(struct ubi_scan_info *ubi, const u32 vol_id, uint8_t *laddr) |
| 1039 | { |
| 1040 | struct ubi_vol_info *vi; |
| 1041 | u32 lnum, last, len; |
| 1042 | |
| 1043 | if (vol_id >= UBI_SPL_VOL_IDS) |
| 1044 | return -EINVAL; |
| 1045 | |
| 1046 | len = 0; |
| 1047 | vi = ubi->volinfo + vol_id; |
| 1048 | last = vi->last_block + 1; |
| 1049 | |
| 1050 | /* Read the blocks to RAM, check CRC */ |
| 1051 | for (lnum = 0 ; lnum < last; lnum++) { |
| 1052 | int res = ubi_load_block(ubi, laddr, vi, vol_id, lnum, last); |
| 1053 | |
| 1054 | if (res < 0) { |
| 1055 | ubi_warn("Failed to load volume %u", vol_id); |
| 1056 | return res; |
| 1057 | } |
| 1058 | /* res is the data length of the read block */ |
| 1059 | laddr += res; |
| 1060 | len += res; |
| 1061 | } |
| 1062 | return len; |
| 1063 | } |
| 1064 | |
| 1065 | int ubispl_load_volumes(struct ubispl_info *info, struct ubispl_load *lvols, |
| 1066 | int nrvols) |
| 1067 | { |
| 1068 | struct ubi_scan_info *ubi = info->ubi; |
| 1069 | int res, i, fastmap = info->fastmap; |
| 1070 | u32 fsize; |
| 1071 | |
| 1072 | retry: |
| 1073 | /* |
| 1074 | * We do a partial initializiation of @ubi. Cleaning fm_buf is |
| 1075 | * not necessary. |
| 1076 | */ |
| 1077 | memset(ubi, 0, offsetof(struct ubi_scan_info, fm_buf)); |
| 1078 | |
| 1079 | ubi->read = info->read; |
| 1080 | |
| 1081 | /* Precalculate the offsets */ |
| 1082 | ubi->vid_offset = info->vid_offset; |
| 1083 | ubi->leb_start = info->leb_start; |
| 1084 | ubi->leb_size = info->peb_size - ubi->leb_start; |
| 1085 | ubi->peb_count = info->peb_count; |
| 1086 | ubi->peb_offset = info->peb_offset; |
| 1087 | |
Hamish Guthrie | 3ce740d | 2019-05-15 15:15:59 +0200 | [diff] [blame] | 1088 | #ifdef CONFIG_SPL_UBI_LOAD_BY_VOLNAME |
| 1089 | ubi->vtbl_valid = 0; |
| 1090 | #endif |
| 1091 | |
Thomas Gleixner | 820d24d | 2016-07-12 20:28:12 +0200 | [diff] [blame] | 1092 | fsize = info->peb_size * info->peb_count; |
| 1093 | ubi->fsize_mb = fsize >> 20; |
| 1094 | |
| 1095 | /* Fastmap init */ |
| 1096 | ubi->fm_size = ubi_calc_fm_size(ubi); |
| 1097 | ubi->fm_enabled = fastmap; |
| 1098 | |
| 1099 | for (i = 0; i < nrvols; i++) { |
| 1100 | struct ubispl_load *lv = lvols + i; |
| 1101 | |
| 1102 | generic_set_bit(lv->vol_id, ubi->toload); |
| 1103 | } |
| 1104 | |
| 1105 | ipl_scan(ubi); |
| 1106 | |
| 1107 | for (i = 0; i < nrvols; i++) { |
| 1108 | struct ubispl_load *lv = lvols + i; |
| 1109 | |
Hamish Guthrie | 3ce740d | 2019-05-15 15:15:59 +0200 | [diff] [blame] | 1110 | #ifdef CONFIG_SPL_UBI_LOAD_BY_VOLNAME |
| 1111 | if (lv->vol_id == -1) { |
| 1112 | for (int j = 0; j < UBI_SPL_VOL_IDS; j++) { |
| 1113 | int len = be16_to_cpu(ubi->vtbl[j].name_len); |
| 1114 | |
| 1115 | if (strncmp(lv->name, |
| 1116 | ubi->vtbl[j].name, |
| 1117 | len) == 0) { |
| 1118 | lv->vol_id = j; |
| 1119 | break; |
| 1120 | } |
| 1121 | } |
| 1122 | } |
| 1123 | ubi_msg("Loading VolName %s (VolId #%d)", lv->name, lv->vol_id); |
| 1124 | #else |
Thomas Gleixner | 820d24d | 2016-07-12 20:28:12 +0200 | [diff] [blame] | 1125 | ubi_msg("Loading VolId #%d", lv->vol_id); |
Hamish Guthrie | 3ce740d | 2019-05-15 15:15:59 +0200 | [diff] [blame] | 1126 | #endif |
Thomas Gleixner | 820d24d | 2016-07-12 20:28:12 +0200 | [diff] [blame] | 1127 | res = ipl_load(ubi, lv->vol_id, lv->load_addr); |
| 1128 | if (res < 0) { |
| 1129 | if (fastmap) { |
| 1130 | fastmap = 0; |
| 1131 | goto retry; |
| 1132 | } |
| 1133 | ubi_warn("Failed"); |
| 1134 | return res; |
| 1135 | } |
| 1136 | } |
| 1137 | return 0; |
| 1138 | } |