2 * Copyright (c) 2012 Linutronix GmbH
3 * Copyright (c) 2014 sigma star gmbh
4 * Author: Richard Weinberger <richard@nod.at>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; version 2.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
13 * the GNU General Public License for more details.
17 #include <linux/crc32.h>
21 * init_seen - allocate memory for used for debugging.
22 * @ubi: UBI device description object
24 static inline int *init_seen(struct ubi_device *ubi)
28 if (!ubi_dbg_chk_fastmap(ubi))
31 ret = kcalloc(ubi->peb_count, sizeof(int), GFP_KERNEL);
33 return ERR_PTR(-ENOMEM);
39 * free_seen - free the seen logic integer array.
40 * @seen: integer array of @ubi->peb_count size
42 static inline void free_seen(int *seen)
48 * set_seen - mark a PEB as seen.
49 * @ubi: UBI device description object
50 * @pnum: The PEB to be makred as seen
51 * @seen: integer array of @ubi->peb_count size
53 static inline void set_seen(struct ubi_device *ubi, int pnum, int *seen)
55 if (!ubi_dbg_chk_fastmap(ubi) || !seen)
62 * self_check_seen - check whether all PEB have been seen by fastmap.
63 * @ubi: UBI device description object
64 * @seen: integer array of @ubi->peb_count size
66 static int self_check_seen(struct ubi_device *ubi, int *seen)
70 if (!ubi_dbg_chk_fastmap(ubi) || !seen)
73 for (pnum = 0; pnum < ubi->peb_count; pnum++) {
74 if (!seen[pnum] && ubi->lookuptbl[pnum]) {
75 ubi_err(ubi, "self-check failed for PEB %d, fastmap didn't see it", pnum);
84 * ubi_calc_fm_size - calculates the fastmap size in bytes for an UBI device.
85 * @ubi: UBI device description object
87 size_t ubi_calc_fm_size(struct ubi_device *ubi)
91 size = sizeof(struct ubi_fm_sb) +
92 sizeof(struct ubi_fm_hdr) +
93 sizeof(struct ubi_fm_scan_pool) +
94 sizeof(struct ubi_fm_scan_pool) +
95 (ubi->peb_count * sizeof(struct ubi_fm_ec)) +
96 (sizeof(struct ubi_fm_eba) +
97 (ubi->peb_count * sizeof(__be32))) +
98 sizeof(struct ubi_fm_volhdr) * UBI_MAX_VOLUMES;
99 return roundup(size, ubi->leb_size);
104 * new_fm_vhdr - allocate a new volume header for fastmap usage.
105 * @ubi: UBI device description object
106 * @vol_id: the VID of the new header
108 * Returns a new struct ubi_vid_hdr on success.
109 * NULL indicates out of memory.
111 static struct ubi_vid_hdr *new_fm_vhdr(struct ubi_device *ubi, int vol_id)
113 struct ubi_vid_hdr *new;
115 new = ubi_zalloc_vid_hdr(ubi, GFP_KERNEL);
119 new->vol_type = UBI_VID_DYNAMIC;
120 new->vol_id = cpu_to_be32(vol_id);
122 /* UBI implementations without fastmap support have to delete the
125 new->compat = UBI_COMPAT_DELETE;
132 * add_aeb - create and add a attach erase block to a given list.
133 * @ai: UBI attach info object
134 * @list: the target list
135 * @pnum: PEB number of the new attach erase block
136 * @ec: erease counter of the new LEB
137 * @scrub: scrub this PEB after attaching
139 * Returns 0 on success, < 0 indicates an internal error.
141 static int add_aeb(struct ubi_attach_info *ai, struct list_head *list,
142 int pnum, int ec, int scrub)
144 struct ubi_ainf_peb *aeb;
146 aeb = kmem_cache_alloc(ai->aeb_slab_cache, GFP_KERNEL);
154 aeb->copy_flag = aeb->sqnum = 0;
156 ai->ec_sum += aeb->ec;
159 if (ai->max_ec < aeb->ec)
160 ai->max_ec = aeb->ec;
162 if (ai->min_ec > aeb->ec)
163 ai->min_ec = aeb->ec;
165 list_add_tail(&aeb->u.list, list);
171 * add_vol - create and add a new volume to ubi_attach_info.
172 * @ai: ubi_attach_info object
173 * @vol_id: VID of the new volume
174 * @used_ebs: number of used EBS
175 * @data_pad: data padding value of the new volume
176 * @vol_type: volume type
177 * @last_eb_bytes: number of bytes in the last LEB
179 * Returns the new struct ubi_ainf_volume on success.
180 * NULL indicates an error.
182 static struct ubi_ainf_volume *add_vol(struct ubi_attach_info *ai, int vol_id,
183 int used_ebs, int data_pad, u8 vol_type,
186 struct ubi_ainf_volume *av;
187 struct rb_node **p = &ai->volumes.rb_node, *parent = NULL;
191 av = rb_entry(parent, struct ubi_ainf_volume, rb);
193 if (vol_id > av->vol_id)
195 else if (vol_id < av->vol_id)
198 return ERR_PTR(-EINVAL);
201 av = kmalloc(sizeof(struct ubi_ainf_volume), GFP_KERNEL);
205 av->highest_lnum = av->leb_count = av->used_ebs = 0;
207 av->data_pad = data_pad;
208 av->last_data_size = last_eb_bytes;
210 av->vol_type = vol_type;
212 if (av->vol_type == UBI_STATIC_VOLUME)
213 av->used_ebs = used_ebs;
215 dbg_bld("found volume (ID %i)", vol_id);
217 rb_link_node(&av->rb, parent, p);
218 rb_insert_color(&av->rb, &ai->volumes);
225 * assign_aeb_to_av - assigns a SEB to a given ainf_volume and removes it
226 * from it's original list.
227 * @ai: ubi_attach_info object
228 * @aeb: the to be assigned SEB
229 * @av: target scan volume
231 static void assign_aeb_to_av(struct ubi_attach_info *ai,
232 struct ubi_ainf_peb *aeb,
233 struct ubi_ainf_volume *av)
235 struct ubi_ainf_peb *tmp_aeb;
236 struct rb_node **p = &ai->volumes.rb_node, *parent = NULL;
238 p = &av->root.rb_node;
242 tmp_aeb = rb_entry(parent, struct ubi_ainf_peb, u.rb);
243 if (aeb->lnum != tmp_aeb->lnum) {
244 if (aeb->lnum < tmp_aeb->lnum)
254 list_del(&aeb->u.list);
257 rb_link_node(&aeb->u.rb, parent, p);
258 rb_insert_color(&aeb->u.rb, &av->root);
262 * update_vol - inserts or updates a LEB which was found a pool.
263 * @ubi: the UBI device object
264 * @ai: attach info object
265 * @av: the volume this LEB belongs to
266 * @new_vh: the volume header derived from new_aeb
267 * @new_aeb: the AEB to be examined
269 * Returns 0 on success, < 0 indicates an internal error.
271 static int update_vol(struct ubi_device *ubi, struct ubi_attach_info *ai,
272 struct ubi_ainf_volume *av, struct ubi_vid_hdr *new_vh,
273 struct ubi_ainf_peb *new_aeb)
275 struct rb_node **p = &av->root.rb_node, *parent = NULL;
276 struct ubi_ainf_peb *aeb, *victim;
281 aeb = rb_entry(parent, struct ubi_ainf_peb, u.rb);
283 if (be32_to_cpu(new_vh->lnum) != aeb->lnum) {
284 if (be32_to_cpu(new_vh->lnum) < aeb->lnum)
292 /* This case can happen if the fastmap gets written
293 * because of a volume change (creation, deletion, ..).
294 * Then a PEB can be within the persistent EBA and the pool.
296 if (aeb->pnum == new_aeb->pnum) {
297 ubi_assert(aeb->lnum == new_aeb->lnum);
298 kmem_cache_free(ai->aeb_slab_cache, new_aeb);
303 cmp_res = ubi_compare_lebs(ubi, aeb, new_aeb->pnum, new_vh);
307 /* new_aeb is newer */
309 victim = kmem_cache_alloc(ai->aeb_slab_cache,
314 victim->ec = aeb->ec;
315 victim->pnum = aeb->pnum;
316 list_add_tail(&victim->u.list, &ai->erase);
318 if (av->highest_lnum == be32_to_cpu(new_vh->lnum))
320 be32_to_cpu(new_vh->data_size);
322 dbg_bld("vol %i: AEB %i's PEB %i is the newer",
323 av->vol_id, aeb->lnum, new_aeb->pnum);
325 aeb->ec = new_aeb->ec;
326 aeb->pnum = new_aeb->pnum;
327 aeb->copy_flag = new_vh->copy_flag;
328 aeb->scrub = new_aeb->scrub;
329 kmem_cache_free(ai->aeb_slab_cache, new_aeb);
331 /* new_aeb is older */
333 dbg_bld("vol %i: AEB %i's PEB %i is old, dropping it",
334 av->vol_id, aeb->lnum, new_aeb->pnum);
335 list_add_tail(&new_aeb->u.list, &ai->erase);
340 /* This LEB is new, let's add it to the volume */
342 if (av->highest_lnum <= be32_to_cpu(new_vh->lnum)) {
343 av->highest_lnum = be32_to_cpu(new_vh->lnum);
344 av->last_data_size = be32_to_cpu(new_vh->data_size);
347 if (av->vol_type == UBI_STATIC_VOLUME)
348 av->used_ebs = be32_to_cpu(new_vh->used_ebs);
352 rb_link_node(&new_aeb->u.rb, parent, p);
353 rb_insert_color(&new_aeb->u.rb, &av->root);
359 * process_pool_aeb - we found a non-empty PEB in a pool.
360 * @ubi: UBI device object
361 * @ai: attach info object
362 * @new_vh: the volume header derived from new_aeb
363 * @new_aeb: the AEB to be examined
365 * Returns 0 on success, < 0 indicates an internal error.
367 static int process_pool_aeb(struct ubi_device *ubi, struct ubi_attach_info *ai,
368 struct ubi_vid_hdr *new_vh,
369 struct ubi_ainf_peb *new_aeb)
371 struct ubi_ainf_volume *av, *tmp_av = NULL;
372 struct rb_node **p = &ai->volumes.rb_node, *parent = NULL;
375 if (be32_to_cpu(new_vh->vol_id) == UBI_FM_SB_VOLUME_ID ||
376 be32_to_cpu(new_vh->vol_id) == UBI_FM_DATA_VOLUME_ID) {
377 kmem_cache_free(ai->aeb_slab_cache, new_aeb);
382 /* Find the volume this SEB belongs to */
385 tmp_av = rb_entry(parent, struct ubi_ainf_volume, rb);
387 if (be32_to_cpu(new_vh->vol_id) > tmp_av->vol_id)
389 else if (be32_to_cpu(new_vh->vol_id) < tmp_av->vol_id)
400 ubi_err(ubi, "orphaned volume in fastmap pool!");
401 kmem_cache_free(ai->aeb_slab_cache, new_aeb);
402 return UBI_BAD_FASTMAP;
405 ubi_assert(be32_to_cpu(new_vh->vol_id) == av->vol_id);
407 return update_vol(ubi, ai, av, new_vh, new_aeb);
411 * unmap_peb - unmap a PEB.
412 * If fastmap detects a free PEB in the pool it has to check whether
413 * this PEB has been unmapped after writing the fastmap.
415 * @ai: UBI attach info object
416 * @pnum: The PEB to be unmapped
418 static void unmap_peb(struct ubi_attach_info *ai, int pnum)
420 struct ubi_ainf_volume *av;
421 struct rb_node *node, *node2;
422 struct ubi_ainf_peb *aeb;
424 for (node = rb_first(&ai->volumes); node; node = rb_next(node)) {
425 av = rb_entry(node, struct ubi_ainf_volume, rb);
427 for (node2 = rb_first(&av->root); node2;
428 node2 = rb_next(node2)) {
429 aeb = rb_entry(node2, struct ubi_ainf_peb, u.rb);
430 if (aeb->pnum == pnum) {
431 rb_erase(&aeb->u.rb, &av->root);
433 kmem_cache_free(ai->aeb_slab_cache, aeb);
441 * scan_pool - scans a pool for changed (no longer empty PEBs).
442 * @ubi: UBI device object
443 * @ai: attach info object
444 * @pebs: an array of all PEB numbers in the to be scanned pool
445 * @pool_size: size of the pool (number of entries in @pebs)
446 * @max_sqnum: pointer to the maximal sequence number
447 * @free: list of PEBs which are most likely free (and go into @ai->free)
449 * Returns 0 on success, if the pool is unusable UBI_BAD_FASTMAP is returned.
450 * < 0 indicates an internal error.
452 static int scan_pool(struct ubi_device *ubi, struct ubi_attach_info *ai,
453 __be32 *pebs, int pool_size, unsigned long long *max_sqnum,
454 struct list_head *free)
456 struct ubi_vid_hdr *vh;
457 struct ubi_ec_hdr *ech;
458 struct ubi_ainf_peb *new_aeb;
459 int i, pnum, err, ret = 0;
461 ech = kzalloc(ubi->ec_hdr_alsize, GFP_KERNEL);
465 vh = ubi_zalloc_vid_hdr(ubi, GFP_KERNEL);
471 dbg_bld("scanning fastmap pool: size = %i", pool_size);
474 * Now scan all PEBs in the pool to find changes which have been made
475 * after the creation of the fastmap
477 for (i = 0; i < pool_size; i++) {
481 pnum = be32_to_cpu(pebs[i]);
483 if (ubi_io_is_bad(ubi, pnum)) {
484 ubi_err(ubi, "bad PEB in fastmap pool!");
485 ret = UBI_BAD_FASTMAP;
489 err = ubi_io_read_ec_hdr(ubi, pnum, ech, 0);
490 if (err && err != UBI_IO_BITFLIPS) {
491 ubi_err(ubi, "unable to read EC header! PEB:%i err:%i",
493 ret = err > 0 ? UBI_BAD_FASTMAP : err;
495 } else if (err == UBI_IO_BITFLIPS)
499 * Older UBI implementations have image_seq set to zero, so
500 * we shouldn't fail if image_seq == 0.
502 image_seq = be32_to_cpu(ech->image_seq);
504 if (image_seq && (image_seq != ubi->image_seq)) {
505 ubi_err(ubi, "bad image seq: 0x%x, expected: 0x%x",
506 be32_to_cpu(ech->image_seq), ubi->image_seq);
507 ret = UBI_BAD_FASTMAP;
511 err = ubi_io_read_vid_hdr(ubi, pnum, vh, 0);
512 if (err == UBI_IO_FF || err == UBI_IO_FF_BITFLIPS) {
513 unsigned long long ec = be64_to_cpu(ech->ec);
515 dbg_bld("Adding PEB to free: %i", pnum);
517 if (err == UBI_IO_FF_BITFLIPS)
520 add_aeb(ai, free, pnum, ec, scrub);
522 } else if (err == 0 || err == UBI_IO_BITFLIPS) {
523 dbg_bld("Found non empty PEB:%i in pool", pnum);
525 if (err == UBI_IO_BITFLIPS)
528 new_aeb = kmem_cache_alloc(ai->aeb_slab_cache,
535 new_aeb->ec = be64_to_cpu(ech->ec);
536 new_aeb->pnum = pnum;
537 new_aeb->lnum = be32_to_cpu(vh->lnum);
538 new_aeb->sqnum = be64_to_cpu(vh->sqnum);
539 new_aeb->copy_flag = vh->copy_flag;
540 new_aeb->scrub = scrub;
542 if (*max_sqnum < new_aeb->sqnum)
543 *max_sqnum = new_aeb->sqnum;
545 err = process_pool_aeb(ubi, ai, vh, new_aeb);
547 ret = err > 0 ? UBI_BAD_FASTMAP : err;
551 /* We are paranoid and fall back to scanning mode */
552 ubi_err(ubi, "fastmap pool PEBs contains damaged PEBs!");
553 ret = err > 0 ? UBI_BAD_FASTMAP : err;
560 ubi_free_vid_hdr(ubi, vh);
566 * count_fastmap_pebs - Counts the PEBs found by fastmap.
567 * @ai: The UBI attach info object
569 static int count_fastmap_pebs(struct ubi_attach_info *ai)
571 struct ubi_ainf_peb *aeb;
572 struct ubi_ainf_volume *av;
573 struct rb_node *rb1, *rb2;
576 list_for_each_entry(aeb, &ai->erase, u.list)
579 list_for_each_entry(aeb, &ai->free, u.list)
582 ubi_rb_for_each_entry(rb1, av, &ai->volumes, rb)
583 ubi_rb_for_each_entry(rb2, aeb, &av->root, u.rb)
590 * ubi_attach_fastmap - creates ubi_attach_info from a fastmap.
591 * @ubi: UBI device object
592 * @ai: UBI attach info object
593 * @fm: the fastmap to be attached
595 * Returns 0 on success, UBI_BAD_FASTMAP if the found fastmap was unusable.
596 * < 0 indicates an internal error.
598 static int ubi_attach_fastmap(struct ubi_device *ubi,
599 struct ubi_attach_info *ai,
600 struct ubi_fastmap_layout *fm)
602 struct list_head used, free;
603 struct ubi_ainf_volume *av;
604 struct ubi_ainf_peb *aeb, *tmp_aeb, *_tmp_aeb;
605 struct ubi_fm_sb *fmsb;
606 struct ubi_fm_hdr *fmhdr;
607 struct ubi_fm_scan_pool *fmpl, *fmpl_wl;
608 struct ubi_fm_ec *fmec;
609 struct ubi_fm_volhdr *fmvhdr;
610 struct ubi_fm_eba *fm_eba;
611 int ret, i, j, pool_size, wl_pool_size;
612 size_t fm_pos = 0, fm_size = ubi->fm_size;
613 unsigned long long max_sqnum = 0;
614 void *fm_raw = ubi->fm_buf;
616 INIT_LIST_HEAD(&used);
617 INIT_LIST_HEAD(&free);
618 ai->min_ec = UBI_MAX_ERASECOUNTER;
620 fmsb = (struct ubi_fm_sb *)(fm_raw);
621 ai->max_sqnum = fmsb->sqnum;
622 fm_pos += sizeof(struct ubi_fm_sb);
623 if (fm_pos >= fm_size)
626 fmhdr = (struct ubi_fm_hdr *)(fm_raw + fm_pos);
627 fm_pos += sizeof(*fmhdr);
628 if (fm_pos >= fm_size)
631 if (be32_to_cpu(fmhdr->magic) != UBI_FM_HDR_MAGIC) {
632 ubi_err(ubi, "bad fastmap header magic: 0x%x, expected: 0x%x",
633 be32_to_cpu(fmhdr->magic), UBI_FM_HDR_MAGIC);
637 fmpl = (struct ubi_fm_scan_pool *)(fm_raw + fm_pos);
638 fm_pos += sizeof(*fmpl);
639 if (fm_pos >= fm_size)
641 if (be32_to_cpu(fmpl->magic) != UBI_FM_POOL_MAGIC) {
642 ubi_err(ubi, "bad fastmap pool magic: 0x%x, expected: 0x%x",
643 be32_to_cpu(fmpl->magic), UBI_FM_POOL_MAGIC);
647 fmpl_wl = (struct ubi_fm_scan_pool *)(fm_raw + fm_pos);
648 fm_pos += sizeof(*fmpl_wl);
649 if (fm_pos >= fm_size)
651 if (be32_to_cpu(fmpl_wl->magic) != UBI_FM_POOL_MAGIC) {
652 ubi_err(ubi, "bad fastmap WL pool magic: 0x%x, expected: 0x%x",
653 be32_to_cpu(fmpl_wl->magic), UBI_FM_POOL_MAGIC);
657 pool_size = be16_to_cpu(fmpl->size);
658 wl_pool_size = be16_to_cpu(fmpl_wl->size);
659 fm->max_pool_size = be16_to_cpu(fmpl->max_size);
660 fm->max_wl_pool_size = be16_to_cpu(fmpl_wl->max_size);
662 if (pool_size > UBI_FM_MAX_POOL_SIZE || pool_size < 0) {
663 ubi_err(ubi, "bad pool size: %i", pool_size);
667 if (wl_pool_size > UBI_FM_MAX_POOL_SIZE || wl_pool_size < 0) {
668 ubi_err(ubi, "bad WL pool size: %i", wl_pool_size);
673 if (fm->max_pool_size > UBI_FM_MAX_POOL_SIZE ||
674 fm->max_pool_size < 0) {
675 ubi_err(ubi, "bad maximal pool size: %i", fm->max_pool_size);
679 if (fm->max_wl_pool_size > UBI_FM_MAX_POOL_SIZE ||
680 fm->max_wl_pool_size < 0) {
681 ubi_err(ubi, "bad maximal WL pool size: %i",
682 fm->max_wl_pool_size);
686 /* read EC values from free list */
687 for (i = 0; i < be32_to_cpu(fmhdr->free_peb_count); i++) {
688 fmec = (struct ubi_fm_ec *)(fm_raw + fm_pos);
689 fm_pos += sizeof(*fmec);
690 if (fm_pos >= fm_size)
693 add_aeb(ai, &ai->free, be32_to_cpu(fmec->pnum),
694 be32_to_cpu(fmec->ec), 0);
697 /* read EC values from used list */
698 for (i = 0; i < be32_to_cpu(fmhdr->used_peb_count); i++) {
699 fmec = (struct ubi_fm_ec *)(fm_raw + fm_pos);
700 fm_pos += sizeof(*fmec);
701 if (fm_pos >= fm_size)
704 add_aeb(ai, &used, be32_to_cpu(fmec->pnum),
705 be32_to_cpu(fmec->ec), 0);
708 /* read EC values from scrub list */
709 for (i = 0; i < be32_to_cpu(fmhdr->scrub_peb_count); i++) {
710 fmec = (struct ubi_fm_ec *)(fm_raw + fm_pos);
711 fm_pos += sizeof(*fmec);
712 if (fm_pos >= fm_size)
715 add_aeb(ai, &used, be32_to_cpu(fmec->pnum),
716 be32_to_cpu(fmec->ec), 1);
719 /* read EC values from erase list */
720 for (i = 0; i < be32_to_cpu(fmhdr->erase_peb_count); i++) {
721 fmec = (struct ubi_fm_ec *)(fm_raw + fm_pos);
722 fm_pos += sizeof(*fmec);
723 if (fm_pos >= fm_size)
726 add_aeb(ai, &ai->erase, be32_to_cpu(fmec->pnum),
727 be32_to_cpu(fmec->ec), 1);
730 ai->mean_ec = div_u64(ai->ec_sum, ai->ec_count);
731 ai->bad_peb_count = be32_to_cpu(fmhdr->bad_peb_count);
733 /* Iterate over all volumes and read their EBA table */
734 for (i = 0; i < be32_to_cpu(fmhdr->vol_count); i++) {
735 fmvhdr = (struct ubi_fm_volhdr *)(fm_raw + fm_pos);
736 fm_pos += sizeof(*fmvhdr);
737 if (fm_pos >= fm_size)
740 if (be32_to_cpu(fmvhdr->magic) != UBI_FM_VHDR_MAGIC) {
741 ubi_err(ubi, "bad fastmap vol header magic: 0x%x, expected: 0x%x",
742 be32_to_cpu(fmvhdr->magic), UBI_FM_VHDR_MAGIC);
746 av = add_vol(ai, be32_to_cpu(fmvhdr->vol_id),
747 be32_to_cpu(fmvhdr->used_ebs),
748 be32_to_cpu(fmvhdr->data_pad),
750 be32_to_cpu(fmvhdr->last_eb_bytes));
753 if (PTR_ERR(av) == -EEXIST)
754 ubi_err(ubi, "volume (ID %i) already exists",
761 if (ai->highest_vol_id < be32_to_cpu(fmvhdr->vol_id))
762 ai->highest_vol_id = be32_to_cpu(fmvhdr->vol_id);
764 fm_eba = (struct ubi_fm_eba *)(fm_raw + fm_pos);
765 fm_pos += sizeof(*fm_eba);
766 fm_pos += (sizeof(__be32) * be32_to_cpu(fm_eba->reserved_pebs));
767 if (fm_pos >= fm_size)
770 if (be32_to_cpu(fm_eba->magic) != UBI_FM_EBA_MAGIC) {
771 ubi_err(ubi, "bad fastmap EBA header magic: 0x%x, expected: 0x%x",
772 be32_to_cpu(fm_eba->magic), UBI_FM_EBA_MAGIC);
776 for (j = 0; j < be32_to_cpu(fm_eba->reserved_pebs); j++) {
777 int pnum = be32_to_cpu(fm_eba->pnum[j]);
783 list_for_each_entry(tmp_aeb, &used, u.list) {
784 if (tmp_aeb->pnum == pnum) {
791 ubi_err(ubi, "PEB %i is in EBA but not in used list", pnum);
797 if (av->highest_lnum <= aeb->lnum)
798 av->highest_lnum = aeb->lnum;
800 assign_aeb_to_av(ai, aeb, av);
802 dbg_bld("inserting PEB:%i (LEB %i) to vol %i",
803 aeb->pnum, aeb->lnum, av->vol_id);
807 ret = scan_pool(ubi, ai, fmpl->pebs, pool_size, &max_sqnum, &free);
811 ret = scan_pool(ubi, ai, fmpl_wl->pebs, wl_pool_size, &max_sqnum, &free);
815 if (max_sqnum > ai->max_sqnum)
816 ai->max_sqnum = max_sqnum;
818 list_for_each_entry_safe(tmp_aeb, _tmp_aeb, &free, u.list)
819 list_move_tail(&tmp_aeb->u.list, &ai->free);
821 list_for_each_entry_safe(tmp_aeb, _tmp_aeb, &used, u.list)
822 list_move_tail(&tmp_aeb->u.list, &ai->erase);
824 ubi_assert(list_empty(&free));
827 * If fastmap is leaking PEBs (must not happen), raise a
828 * fat warning and fall back to scanning mode.
829 * We do this here because in ubi_wl_init() it's too late
830 * and we cannot fall back to scanning.
832 if (WARN_ON(count_fastmap_pebs(ai) != ubi->peb_count -
833 ai->bad_peb_count - fm->used_blocks))
839 ret = UBI_BAD_FASTMAP;
841 list_for_each_entry_safe(tmp_aeb, _tmp_aeb, &used, u.list) {
842 list_del(&tmp_aeb->u.list);
843 kmem_cache_free(ai->aeb_slab_cache, tmp_aeb);
845 list_for_each_entry_safe(tmp_aeb, _tmp_aeb, &free, u.list) {
846 list_del(&tmp_aeb->u.list);
847 kmem_cache_free(ai->aeb_slab_cache, tmp_aeb);
854 * ubi_scan_fastmap - scan the fastmap.
855 * @ubi: UBI device object
856 * @ai: UBI attach info to be filled
857 * @fm_anchor: The fastmap starts at this PEB
859 * Returns 0 on success, UBI_NO_FASTMAP if no fastmap was found,
860 * UBI_BAD_FASTMAP if one was found but is not usable.
861 * < 0 indicates an internal error.
863 int ubi_scan_fastmap(struct ubi_device *ubi, struct ubi_attach_info *ai,
866 struct ubi_fm_sb *fmsb, *fmsb2;
867 struct ubi_vid_hdr *vh;
868 struct ubi_ec_hdr *ech;
869 struct ubi_fastmap_layout *fm;
870 int i, used_blocks, pnum, ret = 0;
873 unsigned long long sqnum = 0;
875 down_write(&ubi->fm_protect);
876 memset(ubi->fm_buf, 0, ubi->fm_size);
878 fmsb = kmalloc(sizeof(*fmsb), GFP_KERNEL);
884 fm = kzalloc(sizeof(*fm), GFP_KERNEL);
891 ret = ubi_io_read(ubi, fmsb, fm_anchor, ubi->leb_start, sizeof(*fmsb));
892 if (ret && ret != UBI_IO_BITFLIPS)
894 else if (ret == UBI_IO_BITFLIPS)
895 fm->to_be_tortured[0] = 1;
897 if (be32_to_cpu(fmsb->magic) != UBI_FM_SB_MAGIC) {
898 ubi_err(ubi, "bad super block magic: 0x%x, expected: 0x%x",
899 be32_to_cpu(fmsb->magic), UBI_FM_SB_MAGIC);
900 ret = UBI_BAD_FASTMAP;
904 if (fmsb->version != UBI_FM_FMT_VERSION) {
905 ubi_err(ubi, "bad fastmap version: %i, expected: %i",
906 fmsb->version, UBI_FM_FMT_VERSION);
907 ret = UBI_BAD_FASTMAP;
911 used_blocks = be32_to_cpu(fmsb->used_blocks);
912 if (used_blocks > UBI_FM_MAX_BLOCKS || used_blocks < 1) {
913 ubi_err(ubi, "number of fastmap blocks is invalid: %i",
915 ret = UBI_BAD_FASTMAP;
919 fm_size = ubi->leb_size * used_blocks;
920 if (fm_size != ubi->fm_size) {
921 ubi_err(ubi, "bad fastmap size: %zi, expected: %zi",
922 fm_size, ubi->fm_size);
923 ret = UBI_BAD_FASTMAP;
927 ech = kzalloc(ubi->ec_hdr_alsize, GFP_KERNEL);
933 vh = ubi_zalloc_vid_hdr(ubi, GFP_KERNEL);
939 for (i = 0; i < used_blocks; i++) {
942 pnum = be32_to_cpu(fmsb->block_loc[i]);
944 if (ubi_io_is_bad(ubi, pnum)) {
945 ret = UBI_BAD_FASTMAP;
949 ret = ubi_io_read_ec_hdr(ubi, pnum, ech, 0);
950 if (ret && ret != UBI_IO_BITFLIPS) {
951 ubi_err(ubi, "unable to read fastmap block# %i EC (PEB: %i)",
954 ret = UBI_BAD_FASTMAP;
956 } else if (ret == UBI_IO_BITFLIPS)
957 fm->to_be_tortured[i] = 1;
959 image_seq = be32_to_cpu(ech->image_seq);
961 ubi->image_seq = image_seq;
964 * Older UBI implementations have image_seq set to zero, so
965 * we shouldn't fail if image_seq == 0.
967 if (image_seq && (image_seq != ubi->image_seq)) {
968 ubi_err(ubi, "wrong image seq:%d instead of %d",
969 be32_to_cpu(ech->image_seq), ubi->image_seq);
970 ret = UBI_BAD_FASTMAP;
974 ret = ubi_io_read_vid_hdr(ubi, pnum, vh, 0);
975 if (ret && ret != UBI_IO_BITFLIPS) {
976 ubi_err(ubi, "unable to read fastmap block# %i (PEB: %i)",
982 if (be32_to_cpu(vh->vol_id) != UBI_FM_SB_VOLUME_ID) {
983 ubi_err(ubi, "bad fastmap anchor vol_id: 0x%x, expected: 0x%x",
984 be32_to_cpu(vh->vol_id),
985 UBI_FM_SB_VOLUME_ID);
986 ret = UBI_BAD_FASTMAP;
990 if (be32_to_cpu(vh->vol_id) != UBI_FM_DATA_VOLUME_ID) {
991 ubi_err(ubi, "bad fastmap data vol_id: 0x%x, expected: 0x%x",
992 be32_to_cpu(vh->vol_id),
993 UBI_FM_DATA_VOLUME_ID);
994 ret = UBI_BAD_FASTMAP;
999 if (sqnum < be64_to_cpu(vh->sqnum))
1000 sqnum = be64_to_cpu(vh->sqnum);
1002 ret = ubi_io_read(ubi, ubi->fm_buf + (ubi->leb_size * i), pnum,
1003 ubi->leb_start, ubi->leb_size);
1004 if (ret && ret != UBI_IO_BITFLIPS) {
1005 ubi_err(ubi, "unable to read fastmap block# %i (PEB: %i, "
1006 "err: %i)", i, pnum, ret);
1014 fmsb2 = (struct ubi_fm_sb *)(ubi->fm_buf);
1015 tmp_crc = be32_to_cpu(fmsb2->data_crc);
1016 fmsb2->data_crc = 0;
1017 crc = crc32(UBI_CRC32_INIT, ubi->fm_buf, fm_size);
1018 if (crc != tmp_crc) {
1019 ubi_err(ubi, "fastmap data CRC is invalid");
1020 ubi_err(ubi, "CRC should be: 0x%x, calc: 0x%x",
1022 ret = UBI_BAD_FASTMAP;
1026 fmsb2->sqnum = sqnum;
1028 fm->used_blocks = used_blocks;
1030 ret = ubi_attach_fastmap(ubi, ai, fm);
1033 ret = UBI_BAD_FASTMAP;
1037 for (i = 0; i < used_blocks; i++) {
1038 struct ubi_wl_entry *e;
1040 e = kmem_cache_alloc(ubi_wl_entry_slab, GFP_KERNEL);
1049 e->pnum = be32_to_cpu(fmsb2->block_loc[i]);
1050 e->ec = be32_to_cpu(fmsb2->block_ec[i]);
1055 ubi->fm_pool.max_size = ubi->fm->max_pool_size;
1056 ubi->fm_wl_pool.max_size = ubi->fm->max_wl_pool_size;
1057 ubi_msg(ubi, "attached by fastmap");
1058 ubi_msg(ubi, "fastmap pool size: %d", ubi->fm_pool.max_size);
1059 ubi_msg(ubi, "fastmap WL pool size: %d",
1060 ubi->fm_wl_pool.max_size);
1061 ubi->fm_disabled = 0;
1062 ubi->fast_attach = 1;
1064 ubi_free_vid_hdr(ubi, vh);
1067 up_write(&ubi->fm_protect);
1068 if (ret == UBI_BAD_FASTMAP)
1069 ubi_err(ubi, "Attach by fastmap failed, doing a full scan!");
1073 ubi_free_vid_hdr(ubi, vh);
1082 * ubi_write_fastmap - writes a fastmap.
1083 * @ubi: UBI device object
1084 * @new_fm: the to be written fastmap
1086 * Returns 0 on success, < 0 indicates an internal error.
1088 static int ubi_write_fastmap(struct ubi_device *ubi,
1089 struct ubi_fastmap_layout *new_fm)
1093 struct ubi_fm_sb *fmsb;
1094 struct ubi_fm_hdr *fmh;
1095 struct ubi_fm_scan_pool *fmpl, *fmpl_wl;
1096 struct ubi_fm_ec *fec;
1097 struct ubi_fm_volhdr *fvh;
1098 struct ubi_fm_eba *feba;
1099 struct ubi_wl_entry *wl_e;
1100 struct ubi_volume *vol;
1101 struct ubi_vid_hdr *avhdr, *dvhdr;
1102 struct ubi_work *ubi_wrk;
1103 struct rb_node *tmp_rb;
1104 int ret, i, j, free_peb_count, used_peb_count, vol_count;
1105 int scrub_peb_count, erase_peb_count;
1106 int *seen_pebs = NULL;
1108 fm_raw = ubi->fm_buf;
1109 memset(ubi->fm_buf, 0, ubi->fm_size);
1111 avhdr = new_fm_vhdr(ubi, UBI_FM_SB_VOLUME_ID);
1117 dvhdr = new_fm_vhdr(ubi, UBI_FM_DATA_VOLUME_ID);
1123 seen_pebs = init_seen(ubi);
1124 if (IS_ERR(seen_pebs)) {
1125 ret = PTR_ERR(seen_pebs);
1129 spin_lock(&ubi->volumes_lock);
1130 spin_lock(&ubi->wl_lock);
1132 fmsb = (struct ubi_fm_sb *)fm_raw;
1133 fm_pos += sizeof(*fmsb);
1134 ubi_assert(fm_pos <= ubi->fm_size);
1136 fmh = (struct ubi_fm_hdr *)(fm_raw + fm_pos);
1137 fm_pos += sizeof(*fmh);
1138 ubi_assert(fm_pos <= ubi->fm_size);
1140 fmsb->magic = cpu_to_be32(UBI_FM_SB_MAGIC);
1141 fmsb->version = UBI_FM_FMT_VERSION;
1142 fmsb->used_blocks = cpu_to_be32(new_fm->used_blocks);
1143 /* the max sqnum will be filled in while *reading* the fastmap */
1146 fmh->magic = cpu_to_be32(UBI_FM_HDR_MAGIC);
1149 scrub_peb_count = 0;
1150 erase_peb_count = 0;
1153 fmpl = (struct ubi_fm_scan_pool *)(fm_raw + fm_pos);
1154 fm_pos += sizeof(*fmpl);
1155 fmpl->magic = cpu_to_be32(UBI_FM_POOL_MAGIC);
1156 fmpl->size = cpu_to_be16(ubi->fm_pool.size);
1157 fmpl->max_size = cpu_to_be16(ubi->fm_pool.max_size);
1159 for (i = 0; i < ubi->fm_pool.size; i++) {
1160 fmpl->pebs[i] = cpu_to_be32(ubi->fm_pool.pebs[i]);
1161 set_seen(ubi, ubi->fm_pool.pebs[i], seen_pebs);
1164 fmpl_wl = (struct ubi_fm_scan_pool *)(fm_raw + fm_pos);
1165 fm_pos += sizeof(*fmpl_wl);
1166 fmpl_wl->magic = cpu_to_be32(UBI_FM_POOL_MAGIC);
1167 fmpl_wl->size = cpu_to_be16(ubi->fm_wl_pool.size);
1168 fmpl_wl->max_size = cpu_to_be16(ubi->fm_wl_pool.max_size);
1170 for (i = 0; i < ubi->fm_wl_pool.size; i++) {
1171 fmpl_wl->pebs[i] = cpu_to_be32(ubi->fm_wl_pool.pebs[i]);
1172 set_seen(ubi, ubi->fm_wl_pool.pebs[i], seen_pebs);
1175 ubi_for_each_free_peb(ubi, wl_e, tmp_rb) {
1176 fec = (struct ubi_fm_ec *)(fm_raw + fm_pos);
1178 fec->pnum = cpu_to_be32(wl_e->pnum);
1179 set_seen(ubi, wl_e->pnum, seen_pebs);
1180 fec->ec = cpu_to_be32(wl_e->ec);
1183 fm_pos += sizeof(*fec);
1184 ubi_assert(fm_pos <= ubi->fm_size);
1186 fmh->free_peb_count = cpu_to_be32(free_peb_count);
1188 ubi_for_each_used_peb(ubi, wl_e, tmp_rb) {
1189 fec = (struct ubi_fm_ec *)(fm_raw + fm_pos);
1191 fec->pnum = cpu_to_be32(wl_e->pnum);
1192 set_seen(ubi, wl_e->pnum, seen_pebs);
1193 fec->ec = cpu_to_be32(wl_e->ec);
1196 fm_pos += sizeof(*fec);
1197 ubi_assert(fm_pos <= ubi->fm_size);
1200 ubi_for_each_protected_peb(ubi, i, wl_e) {
1201 fec = (struct ubi_fm_ec *)(fm_raw + fm_pos);
1203 fec->pnum = cpu_to_be32(wl_e->pnum);
1204 set_seen(ubi, wl_e->pnum, seen_pebs);
1205 fec->ec = cpu_to_be32(wl_e->ec);
1208 fm_pos += sizeof(*fec);
1209 ubi_assert(fm_pos <= ubi->fm_size);
1211 fmh->used_peb_count = cpu_to_be32(used_peb_count);
1213 ubi_for_each_scrub_peb(ubi, wl_e, tmp_rb) {
1214 fec = (struct ubi_fm_ec *)(fm_raw + fm_pos);
1216 fec->pnum = cpu_to_be32(wl_e->pnum);
1217 set_seen(ubi, wl_e->pnum, seen_pebs);
1218 fec->ec = cpu_to_be32(wl_e->ec);
1221 fm_pos += sizeof(*fec);
1222 ubi_assert(fm_pos <= ubi->fm_size);
1224 fmh->scrub_peb_count = cpu_to_be32(scrub_peb_count);
1227 list_for_each_entry(ubi_wrk, &ubi->works, list) {
1228 if (ubi_is_erase_work(ubi_wrk)) {
1232 fec = (struct ubi_fm_ec *)(fm_raw + fm_pos);
1234 fec->pnum = cpu_to_be32(wl_e->pnum);
1235 set_seen(ubi, wl_e->pnum, seen_pebs);
1236 fec->ec = cpu_to_be32(wl_e->ec);
1239 fm_pos += sizeof(*fec);
1240 ubi_assert(fm_pos <= ubi->fm_size);
1243 fmh->erase_peb_count = cpu_to_be32(erase_peb_count);
1245 for (i = 0; i < UBI_MAX_VOLUMES + UBI_INT_VOL_COUNT; i++) {
1246 vol = ubi->volumes[i];
1253 fvh = (struct ubi_fm_volhdr *)(fm_raw + fm_pos);
1254 fm_pos += sizeof(*fvh);
1255 ubi_assert(fm_pos <= ubi->fm_size);
1257 fvh->magic = cpu_to_be32(UBI_FM_VHDR_MAGIC);
1258 fvh->vol_id = cpu_to_be32(vol->vol_id);
1259 fvh->vol_type = vol->vol_type;
1260 fvh->used_ebs = cpu_to_be32(vol->used_ebs);
1261 fvh->data_pad = cpu_to_be32(vol->data_pad);
1262 fvh->last_eb_bytes = cpu_to_be32(vol->last_eb_bytes);
1264 ubi_assert(vol->vol_type == UBI_DYNAMIC_VOLUME ||
1265 vol->vol_type == UBI_STATIC_VOLUME);
1267 feba = (struct ubi_fm_eba *)(fm_raw + fm_pos);
1268 fm_pos += sizeof(*feba) + (sizeof(__be32) * vol->reserved_pebs);
1269 ubi_assert(fm_pos <= ubi->fm_size);
1271 for (j = 0; j < vol->reserved_pebs; j++)
1272 feba->pnum[j] = cpu_to_be32(vol->eba_tbl[j]);
1274 feba->reserved_pebs = cpu_to_be32(j);
1275 feba->magic = cpu_to_be32(UBI_FM_EBA_MAGIC);
1277 fmh->vol_count = cpu_to_be32(vol_count);
1278 fmh->bad_peb_count = cpu_to_be32(ubi->bad_peb_count);
1280 avhdr->sqnum = cpu_to_be64(ubi_next_sqnum(ubi));
1283 spin_unlock(&ubi->wl_lock);
1284 spin_unlock(&ubi->volumes_lock);
1286 dbg_bld("writing fastmap SB to PEB %i", new_fm->e[0]->pnum);
1287 ret = ubi_io_write_vid_hdr(ubi, new_fm->e[0]->pnum, avhdr);
1289 ubi_err(ubi, "unable to write vid_hdr to fastmap SB!");
1293 for (i = 0; i < new_fm->used_blocks; i++) {
1294 fmsb->block_loc[i] = cpu_to_be32(new_fm->e[i]->pnum);
1295 set_seen(ubi, new_fm->e[i]->pnum, seen_pebs);
1296 fmsb->block_ec[i] = cpu_to_be32(new_fm->e[i]->ec);
1300 fmsb->data_crc = cpu_to_be32(crc32(UBI_CRC32_INIT, fm_raw,
1303 for (i = 1; i < new_fm->used_blocks; i++) {
1304 dvhdr->sqnum = cpu_to_be64(ubi_next_sqnum(ubi));
1305 dvhdr->lnum = cpu_to_be32(i);
1306 dbg_bld("writing fastmap data to PEB %i sqnum %llu",
1307 new_fm->e[i]->pnum, be64_to_cpu(dvhdr->sqnum));
1308 ret = ubi_io_write_vid_hdr(ubi, new_fm->e[i]->pnum, dvhdr);
1310 ubi_err(ubi, "unable to write vid_hdr to PEB %i!",
1311 new_fm->e[i]->pnum);
1316 for (i = 0; i < new_fm->used_blocks; i++) {
1317 ret = ubi_io_write(ubi, fm_raw + (i * ubi->leb_size),
1318 new_fm->e[i]->pnum, ubi->leb_start, ubi->leb_size);
1320 ubi_err(ubi, "unable to write fastmap to PEB %i!",
1321 new_fm->e[i]->pnum);
1329 ret = self_check_seen(ubi, seen_pebs);
1330 dbg_bld("fastmap written!");
1333 ubi_free_vid_hdr(ubi, avhdr);
1334 ubi_free_vid_hdr(ubi, dvhdr);
1335 free_seen(seen_pebs);
1341 * erase_block - Manually erase a PEB.
1342 * @ubi: UBI device object
1343 * @pnum: PEB to be erased
1345 * Returns the new EC value on success, < 0 indicates an internal error.
1347 static int erase_block(struct ubi_device *ubi, int pnum)
1350 struct ubi_ec_hdr *ec_hdr;
1353 ec_hdr = kzalloc(ubi->ec_hdr_alsize, GFP_KERNEL);
1357 ret = ubi_io_read_ec_hdr(ubi, pnum, ec_hdr, 0);
1360 else if (ret && ret != UBI_IO_BITFLIPS) {
1365 ret = ubi_io_sync_erase(ubi, pnum, 0);
1369 ec = be64_to_cpu(ec_hdr->ec);
1371 if (ec > UBI_MAX_ERASECOUNTER) {
1376 ec_hdr->ec = cpu_to_be64(ec);
1377 ret = ubi_io_write_ec_hdr(ubi, pnum, ec_hdr);
1388 * invalidate_fastmap - destroys a fastmap.
1389 * @ubi: UBI device object
1391 * This function ensures that upon next UBI attach a full scan
1392 * is issued. We need this if UBI is about to write a new fastmap
1393 * but is unable to do so. In this case we have two options:
1394 * a) Make sure that the current fastmap will not be usued upon
1395 * attach time and contine or b) fall back to RO mode to have the
1396 * current fastmap in a valid state.
1397 * Returns 0 on success, < 0 indicates an internal error.
1399 static int invalidate_fastmap(struct ubi_device *ubi)
1402 struct ubi_fastmap_layout *fm;
1403 struct ubi_wl_entry *e;
1404 struct ubi_vid_hdr *vh = NULL;
1412 fm = kzalloc(sizeof(*fm), GFP_KERNEL);
1416 vh = new_fm_vhdr(ubi, UBI_FM_SB_VOLUME_ID);
1421 e = ubi_wl_get_fm_peb(ubi, 1);
1426 * Create fake fastmap such that UBI will fall back
1429 vh->sqnum = cpu_to_be64(ubi_next_sqnum(ubi));
1430 ret = ubi_io_write_vid_hdr(ubi, e->pnum, vh);
1432 ubi_wl_put_fm_peb(ubi, e, 0, 0);
1436 fm->used_blocks = 1;
1442 ubi_free_vid_hdr(ubi, vh);
1451 * return_fm_pebs - returns all PEBs used by a fastmap back to the
1453 * @ubi: UBI device object
1454 * @fm: fastmap layout object
1456 static void return_fm_pebs(struct ubi_device *ubi,
1457 struct ubi_fastmap_layout *fm)
1464 for (i = 0; i < fm->used_blocks; i++) {
1466 ubi_wl_put_fm_peb(ubi, fm->e[i], i,
1467 fm->to_be_tortured[i]);
1474 * ubi_update_fastmap - will be called by UBI if a volume changes or
1475 * a fastmap pool becomes full.
1476 * @ubi: UBI device object
1478 * Returns 0 on success, < 0 indicates an internal error.
1480 int ubi_update_fastmap(struct ubi_device *ubi)
1483 struct ubi_fastmap_layout *new_fm, *old_fm;
1484 struct ubi_wl_entry *tmp_e;
1486 down_write(&ubi->fm_protect);
1488 ubi_refill_pools(ubi);
1490 if (ubi->ro_mode || ubi->fm_disabled) {
1491 up_write(&ubi->fm_protect);
1495 ret = ubi_ensure_anchor_pebs(ubi);
1497 up_write(&ubi->fm_protect);
1501 new_fm = kzalloc(sizeof(*new_fm), GFP_KERNEL);
1503 up_write(&ubi->fm_protect);
1507 new_fm->used_blocks = ubi->fm_size / ubi->leb_size;
1511 if (new_fm->used_blocks > UBI_FM_MAX_BLOCKS) {
1512 ubi_err(ubi, "fastmap too large");
1517 for (i = 1; i < new_fm->used_blocks; i++) {
1518 spin_lock(&ubi->wl_lock);
1519 tmp_e = ubi_wl_get_fm_peb(ubi, 0);
1520 spin_unlock(&ubi->wl_lock);
1523 if (old_fm && old_fm->e[i]) {
1524 ret = erase_block(ubi, old_fm->e[i]->pnum);
1526 ubi_err(ubi, "could not erase old fastmap PEB");
1528 for (j = 1; j < i; j++) {
1529 ubi_wl_put_fm_peb(ubi, new_fm->e[j],
1531 new_fm->e[j] = NULL;
1535 new_fm->e[i] = old_fm->e[i];
1536 old_fm->e[i] = NULL;
1538 ubi_err(ubi, "could not get any free erase block");
1540 for (j = 1; j < i; j++) {
1541 ubi_wl_put_fm_peb(ubi, new_fm->e[j], j, 0);
1542 new_fm->e[j] = NULL;
1549 new_fm->e[i] = tmp_e;
1551 if (old_fm && old_fm->e[i]) {
1552 ubi_wl_put_fm_peb(ubi, old_fm->e[i], i,
1553 old_fm->to_be_tortured[i]);
1554 old_fm->e[i] = NULL;
1559 /* Old fastmap is larger than the new one */
1560 if (old_fm && new_fm->used_blocks < old_fm->used_blocks) {
1561 for (i = new_fm->used_blocks; i < old_fm->used_blocks; i++) {
1562 ubi_wl_put_fm_peb(ubi, old_fm->e[i], i,
1563 old_fm->to_be_tortured[i]);
1564 old_fm->e[i] = NULL;
1568 spin_lock(&ubi->wl_lock);
1569 tmp_e = ubi_wl_get_fm_peb(ubi, 1);
1570 spin_unlock(&ubi->wl_lock);
1573 /* no fresh anchor PEB was found, reuse the old one */
1575 ret = erase_block(ubi, old_fm->e[0]->pnum);
1577 ubi_err(ubi, "could not erase old anchor PEB");
1579 for (i = 1; i < new_fm->used_blocks; i++) {
1580 ubi_wl_put_fm_peb(ubi, new_fm->e[i],
1582 new_fm->e[i] = NULL;
1586 new_fm->e[0] = old_fm->e[0];
1587 new_fm->e[0]->ec = ret;
1588 old_fm->e[0] = NULL;
1590 /* we've got a new anchor PEB, return the old one */
1591 ubi_wl_put_fm_peb(ubi, old_fm->e[0], 0,
1592 old_fm->to_be_tortured[0]);
1593 new_fm->e[0] = tmp_e;
1594 old_fm->e[0] = NULL;
1598 ubi_err(ubi, "could not find any anchor PEB");
1600 for (i = 1; i < new_fm->used_blocks; i++) {
1601 ubi_wl_put_fm_peb(ubi, new_fm->e[i], i, 0);
1602 new_fm->e[i] = NULL;
1608 new_fm->e[0] = tmp_e;
1611 down_write(&ubi->work_sem);
1612 down_write(&ubi->fm_eba_sem);
1613 ret = ubi_write_fastmap(ubi, new_fm);
1614 up_write(&ubi->fm_eba_sem);
1615 up_write(&ubi->work_sem);
1621 up_write(&ubi->fm_protect);
1626 ubi_warn(ubi, "Unable to write new fastmap, err=%i", ret);
1628 ret = invalidate_fastmap(ubi);
1630 ubi_err(ubi, "Unable to invalidiate current fastmap!");
1633 return_fm_pebs(ubi, old_fm);
1634 return_fm_pebs(ubi, new_fm);