1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (c) 2012 Linutronix GmbH
4 * Copyright (c) 2014 sigma star gmbh
5 * Author: Richard Weinberger <richard@nod.at>
10 #include <linux/crc32.h>
14 #include <ubi_uboot.h>
17 #include <linux/compat.h>
18 #include <linux/math64.h>
22 * init_seen - allocate memory for used for debugging.
23 * @ubi: UBI device description object
25 static inline int *init_seen(struct ubi_device *ubi)
29 if (!ubi_dbg_chk_fastmap(ubi))
32 ret = kcalloc(ubi->peb_count, sizeof(int), GFP_KERNEL);
34 return ERR_PTR(-ENOMEM);
40 * free_seen - free the seen logic integer array.
41 * @seen: integer array of @ubi->peb_count size
43 static inline void free_seen(int *seen)
49 * set_seen - mark a PEB as seen.
50 * @ubi: UBI device description object
51 * @pnum: The PEB to be makred as seen
52 * @seen: integer array of @ubi->peb_count size
54 static inline void set_seen(struct ubi_device *ubi, int pnum, int *seen)
56 if (!ubi_dbg_chk_fastmap(ubi) || !seen)
63 * self_check_seen - check whether all PEB have been seen by fastmap.
64 * @ubi: UBI device description object
65 * @seen: integer array of @ubi->peb_count size
67 static int self_check_seen(struct ubi_device *ubi, int *seen)
71 if (!ubi_dbg_chk_fastmap(ubi) || !seen)
74 for (pnum = 0; pnum < ubi->peb_count; pnum++) {
75 if (!seen[pnum] && ubi->lookuptbl[pnum]) {
76 ubi_err(ubi, "self-check failed for PEB %d, fastmap didn't see it", pnum);
85 * ubi_calc_fm_size - calculates the fastmap size in bytes for an UBI device.
86 * @ubi: UBI device description object
88 size_t ubi_calc_fm_size(struct ubi_device *ubi)
92 size = sizeof(struct ubi_fm_sb) +
93 sizeof(struct ubi_fm_hdr) +
94 sizeof(struct ubi_fm_scan_pool) +
95 sizeof(struct ubi_fm_scan_pool) +
96 (ubi->peb_count * sizeof(struct ubi_fm_ec)) +
97 (sizeof(struct ubi_fm_eba) +
98 (ubi->peb_count * sizeof(__be32))) +
99 sizeof(struct ubi_fm_volhdr) * UBI_MAX_VOLUMES;
100 return roundup(size, ubi->leb_size);
105 * new_fm_vhdr - allocate a new volume header for fastmap usage.
106 * @ubi: UBI device description object
107 * @vol_id: the VID of the new header
109 * Returns a new struct ubi_vid_hdr on success.
110 * NULL indicates out of memory.
112 static struct ubi_vid_hdr *new_fm_vhdr(struct ubi_device *ubi, int vol_id)
114 struct ubi_vid_hdr *new;
116 new = ubi_zalloc_vid_hdr(ubi, GFP_KERNEL);
120 new->vol_type = UBI_VID_DYNAMIC;
121 new->vol_id = cpu_to_be32(vol_id);
123 /* UBI implementations without fastmap support have to delete the
126 new->compat = UBI_COMPAT_DELETE;
133 * add_aeb - create and add a attach erase block to a given list.
134 * @ai: UBI attach info object
135 * @list: the target list
136 * @pnum: PEB number of the new attach erase block
137 * @ec: erease counter of the new LEB
138 * @scrub: scrub this PEB after attaching
140 * Returns 0 on success, < 0 indicates an internal error.
142 static int add_aeb(struct ubi_attach_info *ai, struct list_head *list,
143 int pnum, int ec, int scrub)
145 struct ubi_ainf_peb *aeb;
147 aeb = kmem_cache_alloc(ai->aeb_slab_cache, GFP_KERNEL);
155 aeb->copy_flag = aeb->sqnum = 0;
157 ai->ec_sum += aeb->ec;
160 if (ai->max_ec < aeb->ec)
161 ai->max_ec = aeb->ec;
163 if (ai->min_ec > aeb->ec)
164 ai->min_ec = aeb->ec;
166 list_add_tail(&aeb->u.list, list);
172 * add_vol - create and add a new volume to ubi_attach_info.
173 * @ai: ubi_attach_info object
174 * @vol_id: VID of the new volume
175 * @used_ebs: number of used EBS
176 * @data_pad: data padding value of the new volume
177 * @vol_type: volume type
178 * @last_eb_bytes: number of bytes in the last LEB
180 * Returns the new struct ubi_ainf_volume on success.
181 * NULL indicates an error.
183 static struct ubi_ainf_volume *add_vol(struct ubi_attach_info *ai, int vol_id,
184 int used_ebs, int data_pad, u8 vol_type,
187 struct ubi_ainf_volume *av;
188 struct rb_node **p = &ai->volumes.rb_node, *parent = NULL;
192 av = rb_entry(parent, struct ubi_ainf_volume, rb);
194 if (vol_id > av->vol_id)
196 else if (vol_id < av->vol_id)
199 return ERR_PTR(-EINVAL);
202 av = kmalloc(sizeof(struct ubi_ainf_volume), GFP_KERNEL);
206 av->highest_lnum = av->leb_count = av->used_ebs = 0;
208 av->data_pad = data_pad;
209 av->last_data_size = last_eb_bytes;
211 av->vol_type = vol_type;
213 if (av->vol_type == UBI_STATIC_VOLUME)
214 av->used_ebs = used_ebs;
216 dbg_bld("found volume (ID %i)", vol_id);
218 rb_link_node(&av->rb, parent, p);
219 rb_insert_color(&av->rb, &ai->volumes);
226 * assign_aeb_to_av - assigns a SEB to a given ainf_volume and removes it
227 * from it's original list.
228 * @ai: ubi_attach_info object
229 * @aeb: the to be assigned SEB
230 * @av: target scan volume
232 static void assign_aeb_to_av(struct ubi_attach_info *ai,
233 struct ubi_ainf_peb *aeb,
234 struct ubi_ainf_volume *av)
236 struct ubi_ainf_peb *tmp_aeb;
237 struct rb_node **p = &ai->volumes.rb_node, *parent = NULL;
239 p = &av->root.rb_node;
243 tmp_aeb = rb_entry(parent, struct ubi_ainf_peb, u.rb);
244 if (aeb->lnum != tmp_aeb->lnum) {
245 if (aeb->lnum < tmp_aeb->lnum)
255 list_del(&aeb->u.list);
258 rb_link_node(&aeb->u.rb, parent, p);
259 rb_insert_color(&aeb->u.rb, &av->root);
263 * update_vol - inserts or updates a LEB which was found a pool.
264 * @ubi: the UBI device object
265 * @ai: attach info object
266 * @av: the volume this LEB belongs to
267 * @new_vh: the volume header derived from new_aeb
268 * @new_aeb: the AEB to be examined
270 * Returns 0 on success, < 0 indicates an internal error.
272 static int update_vol(struct ubi_device *ubi, struct ubi_attach_info *ai,
273 struct ubi_ainf_volume *av, struct ubi_vid_hdr *new_vh,
274 struct ubi_ainf_peb *new_aeb)
276 struct rb_node **p = &av->root.rb_node, *parent = NULL;
277 struct ubi_ainf_peb *aeb, *victim;
282 aeb = rb_entry(parent, struct ubi_ainf_peb, u.rb);
284 if (be32_to_cpu(new_vh->lnum) != aeb->lnum) {
285 if (be32_to_cpu(new_vh->lnum) < aeb->lnum)
293 /* This case can happen if the fastmap gets written
294 * because of a volume change (creation, deletion, ..).
295 * Then a PEB can be within the persistent EBA and the pool.
297 if (aeb->pnum == new_aeb->pnum) {
298 ubi_assert(aeb->lnum == new_aeb->lnum);
299 kmem_cache_free(ai->aeb_slab_cache, new_aeb);
304 cmp_res = ubi_compare_lebs(ubi, aeb, new_aeb->pnum, new_vh);
308 /* new_aeb is newer */
310 victim = kmem_cache_alloc(ai->aeb_slab_cache,
315 victim->ec = aeb->ec;
316 victim->pnum = aeb->pnum;
317 list_add_tail(&victim->u.list, &ai->erase);
319 if (av->highest_lnum == be32_to_cpu(new_vh->lnum))
321 be32_to_cpu(new_vh->data_size);
323 dbg_bld("vol %i: AEB %i's PEB %i is the newer",
324 av->vol_id, aeb->lnum, new_aeb->pnum);
326 aeb->ec = new_aeb->ec;
327 aeb->pnum = new_aeb->pnum;
328 aeb->copy_flag = new_vh->copy_flag;
329 aeb->scrub = new_aeb->scrub;
330 kmem_cache_free(ai->aeb_slab_cache, new_aeb);
332 /* new_aeb is older */
334 dbg_bld("vol %i: AEB %i's PEB %i is old, dropping it",
335 av->vol_id, aeb->lnum, new_aeb->pnum);
336 list_add_tail(&new_aeb->u.list, &ai->erase);
341 /* This LEB is new, let's add it to the volume */
343 if (av->highest_lnum <= be32_to_cpu(new_vh->lnum)) {
344 av->highest_lnum = be32_to_cpu(new_vh->lnum);
345 av->last_data_size = be32_to_cpu(new_vh->data_size);
348 if (av->vol_type == UBI_STATIC_VOLUME)
349 av->used_ebs = be32_to_cpu(new_vh->used_ebs);
353 rb_link_node(&new_aeb->u.rb, parent, p);
354 rb_insert_color(&new_aeb->u.rb, &av->root);
360 * process_pool_aeb - we found a non-empty PEB in a pool.
361 * @ubi: UBI device object
362 * @ai: attach info object
363 * @new_vh: the volume header derived from new_aeb
364 * @new_aeb: the AEB to be examined
366 * Returns 0 on success, < 0 indicates an internal error.
368 static int process_pool_aeb(struct ubi_device *ubi, struct ubi_attach_info *ai,
369 struct ubi_vid_hdr *new_vh,
370 struct ubi_ainf_peb *new_aeb)
372 struct ubi_ainf_volume *av, *tmp_av = NULL;
373 struct rb_node **p = &ai->volumes.rb_node, *parent = NULL;
376 if (be32_to_cpu(new_vh->vol_id) == UBI_FM_SB_VOLUME_ID ||
377 be32_to_cpu(new_vh->vol_id) == UBI_FM_DATA_VOLUME_ID) {
378 kmem_cache_free(ai->aeb_slab_cache, new_aeb);
383 /* Find the volume this SEB belongs to */
386 tmp_av = rb_entry(parent, struct ubi_ainf_volume, rb);
388 if (be32_to_cpu(new_vh->vol_id) > tmp_av->vol_id)
390 else if (be32_to_cpu(new_vh->vol_id) < tmp_av->vol_id)
401 ubi_err(ubi, "orphaned volume in fastmap pool!");
402 kmem_cache_free(ai->aeb_slab_cache, new_aeb);
403 return UBI_BAD_FASTMAP;
406 ubi_assert(be32_to_cpu(new_vh->vol_id) == av->vol_id);
408 return update_vol(ubi, ai, av, new_vh, new_aeb);
412 * unmap_peb - unmap a PEB.
413 * If fastmap detects a free PEB in the pool it has to check whether
414 * this PEB has been unmapped after writing the fastmap.
416 * @ai: UBI attach info object
417 * @pnum: The PEB to be unmapped
419 static void unmap_peb(struct ubi_attach_info *ai, int pnum)
421 struct ubi_ainf_volume *av;
422 struct rb_node *node, *node2;
423 struct ubi_ainf_peb *aeb;
425 for (node = rb_first(&ai->volumes); node; node = rb_next(node)) {
426 av = rb_entry(node, struct ubi_ainf_volume, rb);
428 for (node2 = rb_first(&av->root); node2;
429 node2 = rb_next(node2)) {
430 aeb = rb_entry(node2, struct ubi_ainf_peb, u.rb);
431 if (aeb->pnum == pnum) {
432 rb_erase(&aeb->u.rb, &av->root);
434 kmem_cache_free(ai->aeb_slab_cache, aeb);
442 * scan_pool - scans a pool for changed (no longer empty PEBs).
443 * @ubi: UBI device object
444 * @ai: attach info object
445 * @pebs: an array of all PEB numbers in the to be scanned pool
446 * @pool_size: size of the pool (number of entries in @pebs)
447 * @max_sqnum: pointer to the maximal sequence number
448 * @free: list of PEBs which are most likely free (and go into @ai->free)
450 * Returns 0 on success, if the pool is unusable UBI_BAD_FASTMAP is returned.
451 * < 0 indicates an internal error.
454 static int scan_pool(struct ubi_device *ubi, struct ubi_attach_info *ai,
455 __be32 *pebs, int pool_size, unsigned long long *max_sqnum,
456 struct list_head *free)
458 static int scan_pool(struct ubi_device *ubi, struct ubi_attach_info *ai,
459 __be32 *pebs, int pool_size, unsigned long long *max_sqnum,
460 struct list_head *free)
463 struct ubi_vid_hdr *vh;
464 struct ubi_ec_hdr *ech;
465 struct ubi_ainf_peb *new_aeb;
466 int i, pnum, err, ret = 0;
468 ech = kzalloc(ubi->ec_hdr_alsize, GFP_KERNEL);
472 vh = ubi_zalloc_vid_hdr(ubi, GFP_KERNEL);
478 dbg_bld("scanning fastmap pool: size = %i", pool_size);
481 * Now scan all PEBs in the pool to find changes which have been made
482 * after the creation of the fastmap
484 for (i = 0; i < pool_size; i++) {
488 pnum = be32_to_cpu(pebs[i]);
490 if (ubi_io_is_bad(ubi, pnum)) {
491 ubi_err(ubi, "bad PEB in fastmap pool!");
492 ret = UBI_BAD_FASTMAP;
496 err = ubi_io_read_ec_hdr(ubi, pnum, ech, 0);
497 if (err && err != UBI_IO_BITFLIPS) {
498 ubi_err(ubi, "unable to read EC header! PEB:%i err:%i",
500 ret = err > 0 ? UBI_BAD_FASTMAP : err;
502 } else if (err == UBI_IO_BITFLIPS)
506 * Older UBI implementations have image_seq set to zero, so
507 * we shouldn't fail if image_seq == 0.
509 image_seq = be32_to_cpu(ech->image_seq);
511 if (image_seq && (image_seq != ubi->image_seq)) {
512 ubi_err(ubi, "bad image seq: 0x%x, expected: 0x%x",
513 be32_to_cpu(ech->image_seq), ubi->image_seq);
514 ret = UBI_BAD_FASTMAP;
518 err = ubi_io_read_vid_hdr(ubi, pnum, vh, 0);
519 if (err == UBI_IO_FF || err == UBI_IO_FF_BITFLIPS) {
520 unsigned long long ec = be64_to_cpu(ech->ec);
522 dbg_bld("Adding PEB to free: %i", pnum);
523 if (err == UBI_IO_FF_BITFLIPS)
524 add_aeb(ai, free, pnum, ec, 1);
526 add_aeb(ai, free, pnum, ec, 0);
528 } else if (err == 0 || err == UBI_IO_BITFLIPS) {
529 dbg_bld("Found non empty PEB:%i in pool", pnum);
531 if (err == UBI_IO_BITFLIPS)
534 new_aeb = kmem_cache_alloc(ai->aeb_slab_cache,
541 new_aeb->ec = be64_to_cpu(ech->ec);
542 new_aeb->pnum = pnum;
543 new_aeb->lnum = be32_to_cpu(vh->lnum);
544 new_aeb->sqnum = be64_to_cpu(vh->sqnum);
545 new_aeb->copy_flag = vh->copy_flag;
546 new_aeb->scrub = scrub;
548 if (*max_sqnum < new_aeb->sqnum)
549 *max_sqnum = new_aeb->sqnum;
551 err = process_pool_aeb(ubi, ai, vh, new_aeb);
553 ret = err > 0 ? UBI_BAD_FASTMAP : err;
557 /* We are paranoid and fall back to scanning mode */
558 ubi_err(ubi, "fastmap pool PEBs contains damaged PEBs!");
559 ret = err > 0 ? UBI_BAD_FASTMAP : err;
566 ubi_free_vid_hdr(ubi, vh);
572 * count_fastmap_pebs - Counts the PEBs found by fastmap.
573 * @ai: The UBI attach info object
575 static int count_fastmap_pebs(struct ubi_attach_info *ai)
577 struct ubi_ainf_peb *aeb;
578 struct ubi_ainf_volume *av;
579 struct rb_node *rb1, *rb2;
582 list_for_each_entry(aeb, &ai->erase, u.list)
585 list_for_each_entry(aeb, &ai->free, u.list)
588 ubi_rb_for_each_entry(rb1, av, &ai->volumes, rb)
589 ubi_rb_for_each_entry(rb2, aeb, &av->root, u.rb)
596 * ubi_attach_fastmap - creates ubi_attach_info from a fastmap.
597 * @ubi: UBI device object
598 * @ai: UBI attach info object
599 * @fm: the fastmap to be attached
601 * Returns 0 on success, UBI_BAD_FASTMAP if the found fastmap was unusable.
602 * < 0 indicates an internal error.
604 static int ubi_attach_fastmap(struct ubi_device *ubi,
605 struct ubi_attach_info *ai,
606 struct ubi_fastmap_layout *fm)
608 struct list_head used, free;
609 struct ubi_ainf_volume *av;
610 struct ubi_ainf_peb *aeb, *tmp_aeb, *_tmp_aeb;
611 struct ubi_fm_sb *fmsb;
612 struct ubi_fm_hdr *fmhdr;
613 struct ubi_fm_scan_pool *fmpl, *fmpl_wl;
614 struct ubi_fm_ec *fmec;
615 struct ubi_fm_volhdr *fmvhdr;
616 struct ubi_fm_eba *fm_eba;
617 int ret, i, j, pool_size, wl_pool_size;
618 size_t fm_pos = 0, fm_size = ubi->fm_size;
619 unsigned long long max_sqnum = 0;
620 void *fm_raw = ubi->fm_buf;
622 INIT_LIST_HEAD(&used);
623 INIT_LIST_HEAD(&free);
624 ai->min_ec = UBI_MAX_ERASECOUNTER;
626 fmsb = (struct ubi_fm_sb *)(fm_raw);
627 ai->max_sqnum = fmsb->sqnum;
628 fm_pos += sizeof(struct ubi_fm_sb);
629 if (fm_pos >= fm_size)
632 fmhdr = (struct ubi_fm_hdr *)(fm_raw + fm_pos);
633 fm_pos += sizeof(*fmhdr);
634 if (fm_pos >= fm_size)
637 if (be32_to_cpu(fmhdr->magic) != UBI_FM_HDR_MAGIC) {
638 ubi_err(ubi, "bad fastmap header magic: 0x%x, expected: 0x%x",
639 be32_to_cpu(fmhdr->magic), UBI_FM_HDR_MAGIC);
643 fmpl = (struct ubi_fm_scan_pool *)(fm_raw + fm_pos);
644 fm_pos += sizeof(*fmpl);
645 if (fm_pos >= fm_size)
647 if (be32_to_cpu(fmpl->magic) != UBI_FM_POOL_MAGIC) {
648 ubi_err(ubi, "bad fastmap pool magic: 0x%x, expected: 0x%x",
649 be32_to_cpu(fmpl->magic), UBI_FM_POOL_MAGIC);
653 fmpl_wl = (struct ubi_fm_scan_pool *)(fm_raw + fm_pos);
654 fm_pos += sizeof(*fmpl_wl);
655 if (fm_pos >= fm_size)
657 if (be32_to_cpu(fmpl_wl->magic) != UBI_FM_POOL_MAGIC) {
658 ubi_err(ubi, "bad fastmap WL pool magic: 0x%x, expected: 0x%x",
659 be32_to_cpu(fmpl_wl->magic), UBI_FM_POOL_MAGIC);
663 pool_size = be16_to_cpu(fmpl->size);
664 wl_pool_size = be16_to_cpu(fmpl_wl->size);
665 fm->max_pool_size = be16_to_cpu(fmpl->max_size);
666 fm->max_wl_pool_size = be16_to_cpu(fmpl_wl->max_size);
668 if (pool_size > UBI_FM_MAX_POOL_SIZE || pool_size < 0) {
669 ubi_err(ubi, "bad pool size: %i", pool_size);
673 if (wl_pool_size > UBI_FM_MAX_POOL_SIZE || wl_pool_size < 0) {
674 ubi_err(ubi, "bad WL pool size: %i", wl_pool_size);
679 if (fm->max_pool_size > UBI_FM_MAX_POOL_SIZE ||
680 fm->max_pool_size < 0) {
681 ubi_err(ubi, "bad maximal pool size: %i", fm->max_pool_size);
685 if (fm->max_wl_pool_size > UBI_FM_MAX_POOL_SIZE ||
686 fm->max_wl_pool_size < 0) {
687 ubi_err(ubi, "bad maximal WL pool size: %i",
688 fm->max_wl_pool_size);
692 /* read EC values from free list */
693 for (i = 0; i < be32_to_cpu(fmhdr->free_peb_count); i++) {
694 fmec = (struct ubi_fm_ec *)(fm_raw + fm_pos);
695 fm_pos += sizeof(*fmec);
696 if (fm_pos >= fm_size)
699 add_aeb(ai, &ai->free, be32_to_cpu(fmec->pnum),
700 be32_to_cpu(fmec->ec), 0);
703 /* read EC values from used list */
704 for (i = 0; i < be32_to_cpu(fmhdr->used_peb_count); i++) {
705 fmec = (struct ubi_fm_ec *)(fm_raw + fm_pos);
706 fm_pos += sizeof(*fmec);
707 if (fm_pos >= fm_size)
710 add_aeb(ai, &used, be32_to_cpu(fmec->pnum),
711 be32_to_cpu(fmec->ec), 0);
714 /* read EC values from scrub list */
715 for (i = 0; i < be32_to_cpu(fmhdr->scrub_peb_count); i++) {
716 fmec = (struct ubi_fm_ec *)(fm_raw + fm_pos);
717 fm_pos += sizeof(*fmec);
718 if (fm_pos >= fm_size)
721 add_aeb(ai, &used, be32_to_cpu(fmec->pnum),
722 be32_to_cpu(fmec->ec), 1);
725 /* read EC values from erase list */
726 for (i = 0; i < be32_to_cpu(fmhdr->erase_peb_count); i++) {
727 fmec = (struct ubi_fm_ec *)(fm_raw + fm_pos);
728 fm_pos += sizeof(*fmec);
729 if (fm_pos >= fm_size)
732 add_aeb(ai, &ai->erase, be32_to_cpu(fmec->pnum),
733 be32_to_cpu(fmec->ec), 1);
736 ai->mean_ec = div_u64(ai->ec_sum, ai->ec_count);
737 ai->bad_peb_count = be32_to_cpu(fmhdr->bad_peb_count);
739 /* Iterate over all volumes and read their EBA table */
740 for (i = 0; i < be32_to_cpu(fmhdr->vol_count); i++) {
741 fmvhdr = (struct ubi_fm_volhdr *)(fm_raw + fm_pos);
742 fm_pos += sizeof(*fmvhdr);
743 if (fm_pos >= fm_size)
746 if (be32_to_cpu(fmvhdr->magic) != UBI_FM_VHDR_MAGIC) {
747 ubi_err(ubi, "bad fastmap vol header magic: 0x%x, expected: 0x%x",
748 be32_to_cpu(fmvhdr->magic), UBI_FM_VHDR_MAGIC);
752 av = add_vol(ai, be32_to_cpu(fmvhdr->vol_id),
753 be32_to_cpu(fmvhdr->used_ebs),
754 be32_to_cpu(fmvhdr->data_pad),
756 be32_to_cpu(fmvhdr->last_eb_bytes));
760 if (PTR_ERR(av) == -EINVAL) {
761 ubi_err(ubi, "volume (ID %i) already exists",
767 if (ai->highest_vol_id < be32_to_cpu(fmvhdr->vol_id))
768 ai->highest_vol_id = be32_to_cpu(fmvhdr->vol_id);
770 fm_eba = (struct ubi_fm_eba *)(fm_raw + fm_pos);
771 fm_pos += sizeof(*fm_eba);
772 fm_pos += (sizeof(__be32) * be32_to_cpu(fm_eba->reserved_pebs));
773 if (fm_pos >= fm_size)
776 if (be32_to_cpu(fm_eba->magic) != UBI_FM_EBA_MAGIC) {
777 ubi_err(ubi, "bad fastmap EBA header magic: 0x%x, expected: 0x%x",
778 be32_to_cpu(fm_eba->magic), UBI_FM_EBA_MAGIC);
782 for (j = 0; j < be32_to_cpu(fm_eba->reserved_pebs); j++) {
783 int pnum = be32_to_cpu(fm_eba->pnum[j]);
785 if ((int)be32_to_cpu(fm_eba->pnum[j]) < 0)
789 list_for_each_entry(tmp_aeb, &used, u.list) {
790 if (tmp_aeb->pnum == pnum) {
797 ubi_err(ubi, "PEB %i is in EBA but not in used list", pnum);
803 if (av->highest_lnum <= aeb->lnum)
804 av->highest_lnum = aeb->lnum;
806 assign_aeb_to_av(ai, aeb, av);
808 dbg_bld("inserting PEB:%i (LEB %i) to vol %i",
809 aeb->pnum, aeb->lnum, av->vol_id);
813 ret = scan_pool(ubi, ai, fmpl->pebs, pool_size, &max_sqnum, &free);
817 ret = scan_pool(ubi, ai, fmpl_wl->pebs, wl_pool_size, &max_sqnum, &free);
821 if (max_sqnum > ai->max_sqnum)
822 ai->max_sqnum = max_sqnum;
824 list_for_each_entry_safe(tmp_aeb, _tmp_aeb, &free, u.list)
825 list_move_tail(&tmp_aeb->u.list, &ai->free);
827 list_for_each_entry_safe(tmp_aeb, _tmp_aeb, &used, u.list)
828 list_move_tail(&tmp_aeb->u.list, &ai->erase);
830 ubi_assert(list_empty(&free));
833 * If fastmap is leaking PEBs (must not happen), raise a
834 * fat warning and fall back to scanning mode.
835 * We do this here because in ubi_wl_init() it's too late
836 * and we cannot fall back to scanning.
839 if (WARN_ON(count_fastmap_pebs(ai) != ubi->peb_count -
840 ai->bad_peb_count - fm->used_blocks))
843 if (count_fastmap_pebs(ai) != ubi->peb_count -
844 ai->bad_peb_count - fm->used_blocks) {
853 ret = UBI_BAD_FASTMAP;
855 list_for_each_entry_safe(tmp_aeb, _tmp_aeb, &used, u.list) {
856 list_del(&tmp_aeb->u.list);
857 kmem_cache_free(ai->aeb_slab_cache, tmp_aeb);
859 list_for_each_entry_safe(tmp_aeb, _tmp_aeb, &free, u.list) {
860 list_del(&tmp_aeb->u.list);
861 kmem_cache_free(ai->aeb_slab_cache, tmp_aeb);
868 * ubi_scan_fastmap - scan the fastmap.
869 * @ubi: UBI device object
870 * @ai: UBI attach info to be filled
871 * @fm_anchor: The fastmap starts at this PEB
873 * Returns 0 on success, UBI_NO_FASTMAP if no fastmap was found,
874 * UBI_BAD_FASTMAP if one was found but is not usable.
875 * < 0 indicates an internal error.
877 int ubi_scan_fastmap(struct ubi_device *ubi, struct ubi_attach_info *ai,
880 struct ubi_fm_sb *fmsb, *fmsb2;
881 struct ubi_vid_hdr *vh;
882 struct ubi_ec_hdr *ech;
883 struct ubi_fastmap_layout *fm;
884 int i, used_blocks, pnum, ret = 0;
887 unsigned long long sqnum = 0;
889 down_write(&ubi->fm_protect);
890 memset(ubi->fm_buf, 0, ubi->fm_size);
892 fmsb = kmalloc(sizeof(*fmsb), GFP_KERNEL);
898 fm = kzalloc(sizeof(*fm), GFP_KERNEL);
905 ret = ubi_io_read(ubi, fmsb, fm_anchor, ubi->leb_start, sizeof(*fmsb));
906 if (ret && ret != UBI_IO_BITFLIPS)
908 else if (ret == UBI_IO_BITFLIPS)
909 fm->to_be_tortured[0] = 1;
911 if (be32_to_cpu(fmsb->magic) != UBI_FM_SB_MAGIC) {
912 ubi_err(ubi, "bad super block magic: 0x%x, expected: 0x%x",
913 be32_to_cpu(fmsb->magic), UBI_FM_SB_MAGIC);
914 ret = UBI_BAD_FASTMAP;
918 if (fmsb->version != UBI_FM_FMT_VERSION) {
919 ubi_err(ubi, "bad fastmap version: %i, expected: %i",
920 fmsb->version, UBI_FM_FMT_VERSION);
921 ret = UBI_BAD_FASTMAP;
925 used_blocks = be32_to_cpu(fmsb->used_blocks);
926 if (used_blocks > UBI_FM_MAX_BLOCKS || used_blocks < 1) {
927 ubi_err(ubi, "number of fastmap blocks is invalid: %i",
929 ret = UBI_BAD_FASTMAP;
933 fm_size = ubi->leb_size * used_blocks;
934 if (fm_size != ubi->fm_size) {
935 ubi_err(ubi, "bad fastmap size: %zi, expected: %zi",
936 fm_size, ubi->fm_size);
937 ret = UBI_BAD_FASTMAP;
941 ech = kzalloc(ubi->ec_hdr_alsize, GFP_KERNEL);
947 vh = ubi_zalloc_vid_hdr(ubi, GFP_KERNEL);
953 for (i = 0; i < used_blocks; i++) {
956 pnum = be32_to_cpu(fmsb->block_loc[i]);
958 if (ubi_io_is_bad(ubi, pnum)) {
959 ret = UBI_BAD_FASTMAP;
963 ret = ubi_io_read_ec_hdr(ubi, pnum, ech, 0);
964 if (ret && ret != UBI_IO_BITFLIPS) {
965 ubi_err(ubi, "unable to read fastmap block# %i EC (PEB: %i)",
968 ret = UBI_BAD_FASTMAP;
970 } else if (ret == UBI_IO_BITFLIPS)
971 fm->to_be_tortured[i] = 1;
973 image_seq = be32_to_cpu(ech->image_seq);
975 ubi->image_seq = image_seq;
978 * Older UBI implementations have image_seq set to zero, so
979 * we shouldn't fail if image_seq == 0.
981 if (image_seq && (image_seq != ubi->image_seq)) {
982 ubi_err(ubi, "wrong image seq:%d instead of %d",
983 be32_to_cpu(ech->image_seq), ubi->image_seq);
984 ret = UBI_BAD_FASTMAP;
988 ret = ubi_io_read_vid_hdr(ubi, pnum, vh, 0);
989 if (ret && ret != UBI_IO_BITFLIPS) {
990 ubi_err(ubi, "unable to read fastmap block# %i (PEB: %i)",
996 if (be32_to_cpu(vh->vol_id) != UBI_FM_SB_VOLUME_ID) {
997 ubi_err(ubi, "bad fastmap anchor vol_id: 0x%x, expected: 0x%x",
998 be32_to_cpu(vh->vol_id),
999 UBI_FM_SB_VOLUME_ID);
1000 ret = UBI_BAD_FASTMAP;
1004 if (be32_to_cpu(vh->vol_id) != UBI_FM_DATA_VOLUME_ID) {
1005 ubi_err(ubi, "bad fastmap data vol_id: 0x%x, expected: 0x%x",
1006 be32_to_cpu(vh->vol_id),
1007 UBI_FM_DATA_VOLUME_ID);
1008 ret = UBI_BAD_FASTMAP;
1013 if (sqnum < be64_to_cpu(vh->sqnum))
1014 sqnum = be64_to_cpu(vh->sqnum);
1016 ret = ubi_io_read(ubi, ubi->fm_buf + (ubi->leb_size * i), pnum,
1017 ubi->leb_start, ubi->leb_size);
1018 if (ret && ret != UBI_IO_BITFLIPS) {
1019 ubi_err(ubi, "unable to read fastmap block# %i (PEB: %i, "
1020 "err: %i)", i, pnum, ret);
1028 fmsb2 = (struct ubi_fm_sb *)(ubi->fm_buf);
1029 tmp_crc = be32_to_cpu(fmsb2->data_crc);
1030 fmsb2->data_crc = 0;
1031 crc = crc32(UBI_CRC32_INIT, ubi->fm_buf, fm_size);
1032 if (crc != tmp_crc) {
1033 ubi_err(ubi, "fastmap data CRC is invalid");
1034 ubi_err(ubi, "CRC should be: 0x%x, calc: 0x%x",
1036 ret = UBI_BAD_FASTMAP;
1040 fmsb2->sqnum = sqnum;
1042 fm->used_blocks = used_blocks;
1044 ret = ubi_attach_fastmap(ubi, ai, fm);
1047 ret = UBI_BAD_FASTMAP;
1051 for (i = 0; i < used_blocks; i++) {
1052 struct ubi_wl_entry *e;
1054 e = kmem_cache_alloc(ubi_wl_entry_slab, GFP_KERNEL);
1063 e->pnum = be32_to_cpu(fmsb2->block_loc[i]);
1064 e->ec = be32_to_cpu(fmsb2->block_ec[i]);
1069 ubi->fm_pool.max_size = ubi->fm->max_pool_size;
1070 ubi->fm_wl_pool.max_size = ubi->fm->max_wl_pool_size;
1071 ubi_msg(ubi, "attached by fastmap");
1072 ubi_msg(ubi, "fastmap pool size: %d", ubi->fm_pool.max_size);
1073 ubi_msg(ubi, "fastmap WL pool size: %d",
1074 ubi->fm_wl_pool.max_size);
1075 ubi->fm_disabled = 0;
1077 ubi_free_vid_hdr(ubi, vh);
1080 up_write(&ubi->fm_protect);
1081 if (ret == UBI_BAD_FASTMAP)
1082 ubi_err(ubi, "Attach by fastmap failed, doing a full scan!");
1086 ubi_free_vid_hdr(ubi, vh);
1095 * ubi_write_fastmap - writes a fastmap.
1096 * @ubi: UBI device object
1097 * @new_fm: the to be written fastmap
1099 * Returns 0 on success, < 0 indicates an internal error.
1101 static int ubi_write_fastmap(struct ubi_device *ubi,
1102 struct ubi_fastmap_layout *new_fm)
1106 struct ubi_fm_sb *fmsb;
1107 struct ubi_fm_hdr *fmh;
1108 struct ubi_fm_scan_pool *fmpl, *fmpl_wl;
1109 struct ubi_fm_ec *fec;
1110 struct ubi_fm_volhdr *fvh;
1111 struct ubi_fm_eba *feba;
1112 struct ubi_wl_entry *wl_e;
1113 struct ubi_volume *vol;
1114 struct ubi_vid_hdr *avhdr, *dvhdr;
1115 struct ubi_work *ubi_wrk;
1116 struct rb_node *tmp_rb;
1117 int ret, i, j, free_peb_count, used_peb_count, vol_count;
1118 int scrub_peb_count, erase_peb_count;
1119 int *seen_pebs = NULL;
1121 fm_raw = ubi->fm_buf;
1122 memset(ubi->fm_buf, 0, ubi->fm_size);
1124 avhdr = new_fm_vhdr(ubi, UBI_FM_SB_VOLUME_ID);
1130 dvhdr = new_fm_vhdr(ubi, UBI_FM_DATA_VOLUME_ID);
1136 seen_pebs = init_seen(ubi);
1137 if (IS_ERR(seen_pebs)) {
1138 ret = PTR_ERR(seen_pebs);
1142 spin_lock(&ubi->volumes_lock);
1143 spin_lock(&ubi->wl_lock);
1145 fmsb = (struct ubi_fm_sb *)fm_raw;
1146 fm_pos += sizeof(*fmsb);
1147 ubi_assert(fm_pos <= ubi->fm_size);
1149 fmh = (struct ubi_fm_hdr *)(fm_raw + fm_pos);
1150 fm_pos += sizeof(*fmh);
1151 ubi_assert(fm_pos <= ubi->fm_size);
1153 fmsb->magic = cpu_to_be32(UBI_FM_SB_MAGIC);
1154 fmsb->version = UBI_FM_FMT_VERSION;
1155 fmsb->used_blocks = cpu_to_be32(new_fm->used_blocks);
1156 /* the max sqnum will be filled in while *reading* the fastmap */
1159 fmh->magic = cpu_to_be32(UBI_FM_HDR_MAGIC);
1162 scrub_peb_count = 0;
1163 erase_peb_count = 0;
1166 fmpl = (struct ubi_fm_scan_pool *)(fm_raw + fm_pos);
1167 fm_pos += sizeof(*fmpl);
1168 fmpl->magic = cpu_to_be32(UBI_FM_POOL_MAGIC);
1169 fmpl->size = cpu_to_be16(ubi->fm_pool.size);
1170 fmpl->max_size = cpu_to_be16(ubi->fm_pool.max_size);
1172 for (i = 0; i < ubi->fm_pool.size; i++) {
1173 fmpl->pebs[i] = cpu_to_be32(ubi->fm_pool.pebs[i]);
1174 set_seen(ubi, ubi->fm_pool.pebs[i], seen_pebs);
1177 fmpl_wl = (struct ubi_fm_scan_pool *)(fm_raw + fm_pos);
1178 fm_pos += sizeof(*fmpl_wl);
1179 fmpl_wl->magic = cpu_to_be32(UBI_FM_POOL_MAGIC);
1180 fmpl_wl->size = cpu_to_be16(ubi->fm_wl_pool.size);
1181 fmpl_wl->max_size = cpu_to_be16(ubi->fm_wl_pool.max_size);
1183 for (i = 0; i < ubi->fm_wl_pool.size; i++) {
1184 fmpl_wl->pebs[i] = cpu_to_be32(ubi->fm_wl_pool.pebs[i]);
1185 set_seen(ubi, ubi->fm_wl_pool.pebs[i], seen_pebs);
1188 ubi_for_each_free_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);
1199 fmh->free_peb_count = cpu_to_be32(free_peb_count);
1201 ubi_for_each_used_peb(ubi, wl_e, tmp_rb) {
1202 fec = (struct ubi_fm_ec *)(fm_raw + fm_pos);
1204 fec->pnum = cpu_to_be32(wl_e->pnum);
1205 set_seen(ubi, wl_e->pnum, seen_pebs);
1206 fec->ec = cpu_to_be32(wl_e->ec);
1209 fm_pos += sizeof(*fec);
1210 ubi_assert(fm_pos <= ubi->fm_size);
1213 ubi_for_each_protected_peb(ubi, i, wl_e) {
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->used_peb_count = cpu_to_be32(used_peb_count);
1226 ubi_for_each_scrub_peb(ubi, wl_e, tmp_rb) {
1227 fec = (struct ubi_fm_ec *)(fm_raw + fm_pos);
1229 fec->pnum = cpu_to_be32(wl_e->pnum);
1230 set_seen(ubi, wl_e->pnum, seen_pebs);
1231 fec->ec = cpu_to_be32(wl_e->ec);
1234 fm_pos += sizeof(*fec);
1235 ubi_assert(fm_pos <= ubi->fm_size);
1237 fmh->scrub_peb_count = cpu_to_be32(scrub_peb_count);
1240 list_for_each_entry(ubi_wrk, &ubi->works, list) {
1241 if (ubi_is_erase_work(ubi_wrk)) {
1245 fec = (struct ubi_fm_ec *)(fm_raw + fm_pos);
1247 fec->pnum = cpu_to_be32(wl_e->pnum);
1248 set_seen(ubi, wl_e->pnum, seen_pebs);
1249 fec->ec = cpu_to_be32(wl_e->ec);
1252 fm_pos += sizeof(*fec);
1253 ubi_assert(fm_pos <= ubi->fm_size);
1256 fmh->erase_peb_count = cpu_to_be32(erase_peb_count);
1258 for (i = 0; i < UBI_MAX_VOLUMES + UBI_INT_VOL_COUNT; i++) {
1259 vol = ubi->volumes[i];
1266 fvh = (struct ubi_fm_volhdr *)(fm_raw + fm_pos);
1267 fm_pos += sizeof(*fvh);
1268 ubi_assert(fm_pos <= ubi->fm_size);
1270 fvh->magic = cpu_to_be32(UBI_FM_VHDR_MAGIC);
1271 fvh->vol_id = cpu_to_be32(vol->vol_id);
1272 fvh->vol_type = vol->vol_type;
1273 fvh->used_ebs = cpu_to_be32(vol->used_ebs);
1274 fvh->data_pad = cpu_to_be32(vol->data_pad);
1275 fvh->last_eb_bytes = cpu_to_be32(vol->last_eb_bytes);
1277 ubi_assert(vol->vol_type == UBI_DYNAMIC_VOLUME ||
1278 vol->vol_type == UBI_STATIC_VOLUME);
1280 feba = (struct ubi_fm_eba *)(fm_raw + fm_pos);
1281 fm_pos += sizeof(*feba) + (sizeof(__be32) * vol->reserved_pebs);
1282 ubi_assert(fm_pos <= ubi->fm_size);
1284 for (j = 0; j < vol->reserved_pebs; j++)
1285 feba->pnum[j] = cpu_to_be32(vol->eba_tbl[j]);
1287 feba->reserved_pebs = cpu_to_be32(j);
1288 feba->magic = cpu_to_be32(UBI_FM_EBA_MAGIC);
1290 fmh->vol_count = cpu_to_be32(vol_count);
1291 fmh->bad_peb_count = cpu_to_be32(ubi->bad_peb_count);
1293 avhdr->sqnum = cpu_to_be64(ubi_next_sqnum(ubi));
1296 spin_unlock(&ubi->wl_lock);
1297 spin_unlock(&ubi->volumes_lock);
1299 dbg_bld("writing fastmap SB to PEB %i", new_fm->e[0]->pnum);
1300 ret = ubi_io_write_vid_hdr(ubi, new_fm->e[0]->pnum, avhdr);
1302 ubi_err(ubi, "unable to write vid_hdr to fastmap SB!");
1306 for (i = 0; i < new_fm->used_blocks; i++) {
1307 fmsb->block_loc[i] = cpu_to_be32(new_fm->e[i]->pnum);
1308 set_seen(ubi, new_fm->e[i]->pnum, seen_pebs);
1309 fmsb->block_ec[i] = cpu_to_be32(new_fm->e[i]->ec);
1313 fmsb->data_crc = cpu_to_be32(crc32(UBI_CRC32_INIT, fm_raw,
1316 for (i = 1; i < new_fm->used_blocks; i++) {
1317 dvhdr->sqnum = cpu_to_be64(ubi_next_sqnum(ubi));
1318 dvhdr->lnum = cpu_to_be32(i);
1319 dbg_bld("writing fastmap data to PEB %i sqnum %llu",
1320 new_fm->e[i]->pnum, be64_to_cpu(dvhdr->sqnum));
1321 ret = ubi_io_write_vid_hdr(ubi, new_fm->e[i]->pnum, dvhdr);
1323 ubi_err(ubi, "unable to write vid_hdr to PEB %i!",
1324 new_fm->e[i]->pnum);
1329 for (i = 0; i < new_fm->used_blocks; i++) {
1330 ret = ubi_io_write(ubi, fm_raw + (i * ubi->leb_size),
1331 new_fm->e[i]->pnum, ubi->leb_start, ubi->leb_size);
1333 ubi_err(ubi, "unable to write fastmap to PEB %i!",
1334 new_fm->e[i]->pnum);
1342 ret = self_check_seen(ubi, seen_pebs);
1343 dbg_bld("fastmap written!");
1346 ubi_free_vid_hdr(ubi, avhdr);
1347 ubi_free_vid_hdr(ubi, dvhdr);
1348 free_seen(seen_pebs);
1354 * erase_block - Manually erase a PEB.
1355 * @ubi: UBI device object
1356 * @pnum: PEB to be erased
1358 * Returns the new EC value on success, < 0 indicates an internal error.
1360 static int erase_block(struct ubi_device *ubi, int pnum)
1363 struct ubi_ec_hdr *ec_hdr;
1366 ec_hdr = kzalloc(ubi->ec_hdr_alsize, GFP_KERNEL);
1370 ret = ubi_io_read_ec_hdr(ubi, pnum, ec_hdr, 0);
1373 else if (ret && ret != UBI_IO_BITFLIPS) {
1378 ret = ubi_io_sync_erase(ubi, pnum, 0);
1382 ec = be64_to_cpu(ec_hdr->ec);
1384 if (ec > UBI_MAX_ERASECOUNTER) {
1389 ec_hdr->ec = cpu_to_be64(ec);
1390 ret = ubi_io_write_ec_hdr(ubi, pnum, ec_hdr);
1401 * invalidate_fastmap - destroys a fastmap.
1402 * @ubi: UBI device object
1404 * This function ensures that upon next UBI attach a full scan
1405 * is issued. We need this if UBI is about to write a new fastmap
1406 * but is unable to do so. In this case we have two options:
1407 * a) Make sure that the current fastmap will not be usued upon
1408 * attach time and contine or b) fall back to RO mode to have the
1409 * current fastmap in a valid state.
1410 * Returns 0 on success, < 0 indicates an internal error.
1412 static int invalidate_fastmap(struct ubi_device *ubi)
1415 struct ubi_fastmap_layout *fm;
1416 struct ubi_wl_entry *e;
1417 struct ubi_vid_hdr *vh = NULL;
1425 fm = kzalloc(sizeof(*fm), GFP_KERNEL);
1429 vh = new_fm_vhdr(ubi, UBI_FM_SB_VOLUME_ID);
1434 e = ubi_wl_get_fm_peb(ubi, 1);
1439 * Create fake fastmap such that UBI will fall back
1442 vh->sqnum = cpu_to_be64(ubi_next_sqnum(ubi));
1443 ret = ubi_io_write_vid_hdr(ubi, e->pnum, vh);
1445 ubi_wl_put_fm_peb(ubi, e, 0, 0);
1449 fm->used_blocks = 1;
1455 ubi_free_vid_hdr(ubi, vh);
1464 * return_fm_pebs - returns all PEBs used by a fastmap back to the
1466 * @ubi: UBI device object
1467 * @fm: fastmap layout object
1469 static void return_fm_pebs(struct ubi_device *ubi,
1470 struct ubi_fastmap_layout *fm)
1477 for (i = 0; i < fm->used_blocks; i++) {
1479 ubi_wl_put_fm_peb(ubi, fm->e[i], i,
1480 fm->to_be_tortured[i]);
1487 * ubi_update_fastmap - will be called by UBI if a volume changes or
1488 * a fastmap pool becomes full.
1489 * @ubi: UBI device object
1491 * Returns 0 on success, < 0 indicates an internal error.
1493 int ubi_update_fastmap(struct ubi_device *ubi)
1496 struct ubi_fastmap_layout *new_fm, *old_fm;
1497 struct ubi_wl_entry *tmp_e;
1499 down_write(&ubi->fm_protect);
1501 ubi_refill_pools(ubi);
1503 if (ubi->ro_mode || ubi->fm_disabled) {
1504 up_write(&ubi->fm_protect);
1508 ret = ubi_ensure_anchor_pebs(ubi);
1510 up_write(&ubi->fm_protect);
1514 new_fm = kzalloc(sizeof(*new_fm), GFP_KERNEL);
1516 up_write(&ubi->fm_protect);
1520 new_fm->used_blocks = ubi->fm_size / ubi->leb_size;
1524 if (new_fm->used_blocks > UBI_FM_MAX_BLOCKS) {
1525 ubi_err(ubi, "fastmap too large");
1530 for (i = 1; i < new_fm->used_blocks; i++) {
1531 spin_lock(&ubi->wl_lock);
1532 tmp_e = ubi_wl_get_fm_peb(ubi, 0);
1533 spin_unlock(&ubi->wl_lock);
1536 if (old_fm && old_fm->e[i]) {
1537 ret = erase_block(ubi, old_fm->e[i]->pnum);
1539 ubi_err(ubi, "could not erase old fastmap PEB");
1541 for (j = 1; j < i; j++) {
1542 ubi_wl_put_fm_peb(ubi, new_fm->e[j],
1544 new_fm->e[j] = NULL;
1548 new_fm->e[i] = old_fm->e[i];
1549 old_fm->e[i] = NULL;
1551 ubi_err(ubi, "could not get any free erase block");
1553 for (j = 1; j < i; j++) {
1554 ubi_wl_put_fm_peb(ubi, new_fm->e[j], j, 0);
1555 new_fm->e[j] = NULL;
1562 new_fm->e[i] = tmp_e;
1564 if (old_fm && old_fm->e[i]) {
1565 ubi_wl_put_fm_peb(ubi, old_fm->e[i], i,
1566 old_fm->to_be_tortured[i]);
1567 old_fm->e[i] = NULL;
1572 /* Old fastmap is larger than the new one */
1573 if (old_fm && new_fm->used_blocks < old_fm->used_blocks) {
1574 for (i = new_fm->used_blocks; i < old_fm->used_blocks; i++) {
1575 ubi_wl_put_fm_peb(ubi, old_fm->e[i], i,
1576 old_fm->to_be_tortured[i]);
1577 old_fm->e[i] = NULL;
1581 spin_lock(&ubi->wl_lock);
1582 tmp_e = ubi_wl_get_fm_peb(ubi, 1);
1583 spin_unlock(&ubi->wl_lock);
1586 /* no fresh anchor PEB was found, reuse the old one */
1588 ret = erase_block(ubi, old_fm->e[0]->pnum);
1590 ubi_err(ubi, "could not erase old anchor PEB");
1592 for (i = 1; i < new_fm->used_blocks; i++) {
1593 ubi_wl_put_fm_peb(ubi, new_fm->e[i],
1595 new_fm->e[i] = NULL;
1599 new_fm->e[0] = old_fm->e[0];
1600 new_fm->e[0]->ec = ret;
1601 old_fm->e[0] = NULL;
1603 /* we've got a new anchor PEB, return the old one */
1604 ubi_wl_put_fm_peb(ubi, old_fm->e[0], 0,
1605 old_fm->to_be_tortured[0]);
1606 new_fm->e[0] = tmp_e;
1607 old_fm->e[0] = NULL;
1611 ubi_err(ubi, "could not find any anchor PEB");
1613 for (i = 1; i < new_fm->used_blocks; i++) {
1614 ubi_wl_put_fm_peb(ubi, new_fm->e[i], i, 0);
1615 new_fm->e[i] = NULL;
1621 new_fm->e[0] = tmp_e;
1624 down_write(&ubi->work_sem);
1625 down_write(&ubi->fm_eba_sem);
1626 ret = ubi_write_fastmap(ubi, new_fm);
1627 up_write(&ubi->fm_eba_sem);
1628 up_write(&ubi->work_sem);
1634 up_write(&ubi->fm_protect);
1639 ubi_warn(ubi, "Unable to write new fastmap, err=%i", ret);
1641 ret = invalidate_fastmap(ubi);
1643 ubi_err(ubi, "Unable to invalidiate current fastmap!");
1646 return_fm_pebs(ubi, old_fm);
1647 return_fm_pebs(ubi, new_fm);