// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (c) 2012 Linutronix GmbH * Copyright (c) 2014 sigma star gmbh * Author: Richard Weinberger <richard@nod.at> */ #include <linux/crc32.h> #include <linux/bitmap.h> #include "ubi.h" /** * init_seen - allocate memory for used for debugging. * @ubi: UBI device description object */ static inline unsigned long *init_seen(struct ubi_device *ubi) { <------>unsigned long *ret; <------>if (!ubi_dbg_chk_fastmap(ubi)) <------><------>return NULL; <------>ret = kcalloc(BITS_TO_LONGS(ubi->peb_count), sizeof(unsigned long), <------><------> GFP_KERNEL); <------>if (!ret) <------><------>return ERR_PTR(-ENOMEM); <------>return ret; } /** * free_seen - free the seen logic integer array. * @seen: integer array of @ubi->peb_count size */ static inline void free_seen(unsigned long *seen) { <------>kfree(seen); } /** * set_seen - mark a PEB as seen. * @ubi: UBI device description object * @pnum: The PEB to be makred as seen * @seen: integer array of @ubi->peb_count size */ static inline void set_seen(struct ubi_device *ubi, int pnum, unsigned long *seen) { <------>if (!ubi_dbg_chk_fastmap(ubi) || !seen) <------><------>return; <------>set_bit(pnum, seen); } /** * self_check_seen - check whether all PEB have been seen by fastmap. * @ubi: UBI device description object * @seen: integer array of @ubi->peb_count size */ static int self_check_seen(struct ubi_device *ubi, unsigned long *seen) { <------>int pnum, ret = 0; <------>if (!ubi_dbg_chk_fastmap(ubi) || !seen) <------><------>return 0; <------>for (pnum = 0; pnum < ubi->peb_count; pnum++) { <------><------>if (!test_bit(pnum, seen) && ubi->lookuptbl[pnum]) { <------><------><------>ubi_err(ubi, "self-check failed for PEB %d, fastmap didn't see it", pnum); <------><------><------>ret = -EINVAL; <------><------>} <------>} <------>return ret; } /** * ubi_calc_fm_size - calculates the fastmap size in bytes for an UBI device. * @ubi: UBI device description object */ size_t ubi_calc_fm_size(struct ubi_device *ubi) { <------>size_t size; <------>size = sizeof(struct ubi_fm_sb) + <------><------>sizeof(struct ubi_fm_hdr) + <------><------>sizeof(struct ubi_fm_scan_pool) + <------><------>sizeof(struct ubi_fm_scan_pool) + <------><------>(ubi->peb_count * sizeof(struct ubi_fm_ec)) + <------><------>(sizeof(struct ubi_fm_eba) + <------><------>(ubi->peb_count * sizeof(__be32))) + <------><------>sizeof(struct ubi_fm_volhdr) * UBI_MAX_VOLUMES; <------>return roundup(size, ubi->leb_size); } /** * new_fm_vhdr - allocate a new volume header for fastmap usage. * @ubi: UBI device description object * @vol_id: the VID of the new header * * Returns a new struct ubi_vid_hdr on success. * NULL indicates out of memory. */ static struct ubi_vid_io_buf *new_fm_vbuf(struct ubi_device *ubi, int vol_id) { <------>struct ubi_vid_io_buf *new; <------>struct ubi_vid_hdr *vh; <------>new = ubi_alloc_vid_buf(ubi, GFP_KERNEL); <------>if (!new) <------><------>goto out; <------>vh = ubi_get_vid_hdr(new); <------>vh->vol_type = UBI_VID_DYNAMIC; <------>vh->vol_id = cpu_to_be32(vol_id); <------>/* UBI implementations without fastmap support have to delete the <------> * fastmap. <------> */ <------>vh->compat = UBI_COMPAT_DELETE; out: <------>return new; } /** * add_aeb - create and add a attach erase block to a given list. * @ai: UBI attach info object * @list: the target list * @pnum: PEB number of the new attach erase block * @ec: erease counter of the new LEB * @scrub: scrub this PEB after attaching * * Returns 0 on success, < 0 indicates an internal error. */ static int add_aeb(struct ubi_attach_info *ai, struct list_head *list, <------><------> int pnum, int ec, int scrub) { <------>struct ubi_ainf_peb *aeb; <------>aeb = ubi_alloc_aeb(ai, pnum, ec); <------>if (!aeb) <------><------>return -ENOMEM; <------>aeb->lnum = -1; <------>aeb->scrub = scrub; <------>aeb->copy_flag = aeb->sqnum = 0; <------>ai->ec_sum += aeb->ec; <------>ai->ec_count++; <------>if (ai->max_ec < aeb->ec) <------><------>ai->max_ec = aeb->ec; <------>if (ai->min_ec > aeb->ec) <------><------>ai->min_ec = aeb->ec; <------>list_add_tail(&aeb->u.list, list); <------>return 0; } /** * add_vol - create and add a new volume to ubi_attach_info. * @ai: ubi_attach_info object * @vol_id: VID of the new volume * @used_ebs: number of used EBS * @data_pad: data padding value of the new volume * @vol_type: volume type * @last_eb_bytes: number of bytes in the last LEB * * Returns the new struct ubi_ainf_volume on success. * NULL indicates an error. */ static struct ubi_ainf_volume *add_vol(struct ubi_attach_info *ai, int vol_id, <------><------><------><------> int used_ebs, int data_pad, u8 vol_type, <------><------><------><------> int last_eb_bytes) { <------>struct ubi_ainf_volume *av; <------>av = ubi_add_av(ai, vol_id); <------>if (IS_ERR(av)) <------><------>return av; <------>av->data_pad = data_pad; <------>av->last_data_size = last_eb_bytes; <------>av->compat = 0; <------>av->vol_type = vol_type; <------>if (av->vol_type == UBI_STATIC_VOLUME) <------><------>av->used_ebs = used_ebs; <------>dbg_bld("found volume (ID %i)", vol_id); <------>return av; } /** * assign_aeb_to_av - assigns a SEB to a given ainf_volume and removes it * from it's original list. * @ai: ubi_attach_info object * @aeb: the to be assigned SEB * @av: target scan volume */ static void assign_aeb_to_av(struct ubi_attach_info *ai, <------><------><------> struct ubi_ainf_peb *aeb, <------><------><------> struct ubi_ainf_volume *av) { <------>struct ubi_ainf_peb *tmp_aeb; <------>struct rb_node **p = &av->root.rb_node, *parent = NULL; <------>while (*p) { <------><------>parent = *p; <------><------>tmp_aeb = rb_entry(parent, struct ubi_ainf_peb, u.rb); <------><------>if (aeb->lnum != tmp_aeb->lnum) { <------><------><------>if (aeb->lnum < tmp_aeb->lnum) <------><------><------><------>p = &(*p)->rb_left; <------><------><------>else <------><------><------><------>p = &(*p)->rb_right; <------><------><------>continue; <------><------>} else <------><------><------>break; <------>} <------>list_del(&aeb->u.list); <------>av->leb_count++; <------>rb_link_node(&aeb->u.rb, parent, p); <------>rb_insert_color(&aeb->u.rb, &av->root); } /** * update_vol - inserts or updates a LEB which was found a pool. * @ubi: the UBI device object * @ai: attach info object * @av: the volume this LEB belongs to * @new_vh: the volume header derived from new_aeb * @new_aeb: the AEB to be examined * * Returns 0 on success, < 0 indicates an internal error. */ static int update_vol(struct ubi_device *ubi, struct ubi_attach_info *ai, <------><------> struct ubi_ainf_volume *av, struct ubi_vid_hdr *new_vh, <------><------> struct ubi_ainf_peb *new_aeb) { <------>struct rb_node **p = &av->root.rb_node, *parent = NULL; <------>struct ubi_ainf_peb *aeb, *victim; <------>int cmp_res; <------>while (*p) { <------><------>parent = *p; <------><------>aeb = rb_entry(parent, struct ubi_ainf_peb, u.rb); <------><------>if (be32_to_cpu(new_vh->lnum) != aeb->lnum) { <------><------><------>if (be32_to_cpu(new_vh->lnum) < aeb->lnum) <------><------><------><------>p = &(*p)->rb_left; <------><------><------>else <------><------><------><------>p = &(*p)->rb_right; <------><------><------>continue; <------><------>} <------><------>/* This case can happen if the fastmap gets written <------><------> * because of a volume change (creation, deletion, ..). <------><------> * Then a PEB can be within the persistent EBA and the pool. <------><------> */ <------><------>if (aeb->pnum == new_aeb->pnum) { <------><------><------>ubi_assert(aeb->lnum == new_aeb->lnum); <------><------><------>ubi_free_aeb(ai, new_aeb); <------><------><------>return 0; <------><------>} <------><------>cmp_res = ubi_compare_lebs(ubi, aeb, new_aeb->pnum, new_vh); <------><------>if (cmp_res < 0) <------><------><------>return cmp_res; <------><------>/* new_aeb is newer */ <------><------>if (cmp_res & 1) { <------><------><------>victim = ubi_alloc_aeb(ai, aeb->pnum, aeb->ec); <------><------><------>if (!victim) <------><------><------><------>return -ENOMEM; <------><------><------>list_add_tail(&victim->u.list, &ai->erase); <------><------><------>if (av->highest_lnum == be32_to_cpu(new_vh->lnum)) <------><------><------><------>av->last_data_size = <------><------><------><------><------>be32_to_cpu(new_vh->data_size); <------><------><------>dbg_bld("vol %i: AEB %i's PEB %i is the newer", <------><------><------><------>av->vol_id, aeb->lnum, new_aeb->pnum); <------><------><------>aeb->ec = new_aeb->ec; <------><------><------>aeb->pnum = new_aeb->pnum; <------><------><------>aeb->copy_flag = new_vh->copy_flag; <------><------><------>aeb->scrub = new_aeb->scrub; <------><------><------>aeb->sqnum = new_aeb->sqnum; <------><------><------>ubi_free_aeb(ai, new_aeb); <------><------>/* new_aeb is older */ <------><------>} else { <------><------><------>dbg_bld("vol %i: AEB %i's PEB %i is old, dropping it", <------><------><------><------>av->vol_id, aeb->lnum, new_aeb->pnum); <------><------><------>list_add_tail(&new_aeb->u.list, &ai->erase); <------><------>} <------><------>return 0; <------>} <------>/* This LEB is new, let's add it to the volume */ <------>if (av->highest_lnum <= be32_to_cpu(new_vh->lnum)) { <------><------>av->highest_lnum = be32_to_cpu(new_vh->lnum); <------><------>av->last_data_size = be32_to_cpu(new_vh->data_size); <------>} <------>if (av->vol_type == UBI_STATIC_VOLUME) <------><------>av->used_ebs = be32_to_cpu(new_vh->used_ebs); <------>av->leb_count++; <------>rb_link_node(&new_aeb->u.rb, parent, p); <------>rb_insert_color(&new_aeb->u.rb, &av->root); <------>return 0; } /** * process_pool_aeb - we found a non-empty PEB in a pool. * @ubi: UBI device object * @ai: attach info object * @new_vh: the volume header derived from new_aeb * @new_aeb: the AEB to be examined * * Returns 0 on success, < 0 indicates an internal error. */ static int process_pool_aeb(struct ubi_device *ubi, struct ubi_attach_info *ai, <------><------><------> struct ubi_vid_hdr *new_vh, <------><------><------> struct ubi_ainf_peb *new_aeb) { <------>int vol_id = be32_to_cpu(new_vh->vol_id); <------>struct ubi_ainf_volume *av; <------>if (vol_id == UBI_FM_SB_VOLUME_ID || vol_id == UBI_FM_DATA_VOLUME_ID) { <------><------>ubi_free_aeb(ai, new_aeb); <------><------>return 0; <------>} <------>/* Find the volume this SEB belongs to */ <------>av = ubi_find_av(ai, vol_id); <------>if (!av) { <------><------>ubi_err(ubi, "orphaned volume in fastmap pool!"); <------><------>ubi_free_aeb(ai, new_aeb); <------><------>return UBI_BAD_FASTMAP; <------>} <------>ubi_assert(vol_id == av->vol_id); <------>return update_vol(ubi, ai, av, new_vh, new_aeb); } /** * unmap_peb - unmap a PEB. * If fastmap detects a free PEB in the pool it has to check whether * this PEB has been unmapped after writing the fastmap. * * @ai: UBI attach info object * @pnum: The PEB to be unmapped */ static void unmap_peb(struct ubi_attach_info *ai, int pnum) { <------>struct ubi_ainf_volume *av; <------>struct rb_node *node, *node2; <------>struct ubi_ainf_peb *aeb; <------>ubi_rb_for_each_entry(node, av, &ai->volumes, rb) { <------><------>ubi_rb_for_each_entry(node2, aeb, &av->root, u.rb) { <------><------><------>if (aeb->pnum == pnum) { <------><------><------><------>rb_erase(&aeb->u.rb, &av->root); <------><------><------><------>av->leb_count--; <------><------><------><------>ubi_free_aeb(ai, aeb); <------><------><------><------>return; <------><------><------>} <------><------>} <------>} } /** * scan_pool - scans a pool for changed (no longer empty PEBs). * @ubi: UBI device object * @ai: attach info object * @pebs: an array of all PEB numbers in the to be scanned pool * @pool_size: size of the pool (number of entries in @pebs) * @max_sqnum: pointer to the maximal sequence number * @free: list of PEBs which are most likely free (and go into @ai->free) * * Returns 0 on success, if the pool is unusable UBI_BAD_FASTMAP is returned. * < 0 indicates an internal error. */ static int scan_pool(struct ubi_device *ubi, struct ubi_attach_info *ai, <------><------> __be32 *pebs, int pool_size, unsigned long long *max_sqnum, <------><------> struct list_head *free) { <------>struct ubi_vid_io_buf *vb; <------>struct ubi_vid_hdr *vh; <------>struct ubi_ec_hdr *ech; <------>struct ubi_ainf_peb *new_aeb; <------>int i, pnum, err, ret = 0; <------>ech = kzalloc(ubi->ec_hdr_alsize, GFP_KERNEL); <------>if (!ech) <------><------>return -ENOMEM; <------>vb = ubi_alloc_vid_buf(ubi, GFP_KERNEL); <------>if (!vb) { <------><------>kfree(ech); <------><------>return -ENOMEM; <------>} <------>vh = ubi_get_vid_hdr(vb); <------>dbg_bld("scanning fastmap pool: size = %i", pool_size); <------>/* <------> * Now scan all PEBs in the pool to find changes which have been made <------> * after the creation of the fastmap <------> */ <------>for (i = 0; i < pool_size; i++) { <------><------>int scrub = 0; <------><------>int image_seq; <------><------>pnum = be32_to_cpu(pebs[i]); <------><------>if (ubi_io_is_bad(ubi, pnum)) { <------><------><------>ubi_err(ubi, "bad PEB in fastmap pool!"); <------><------><------>ret = UBI_BAD_FASTMAP; <------><------><------>goto out; <------><------>} <------><------>err = ubi_io_read_ec_hdr(ubi, pnum, ech, 0); <------><------>if (err && err != UBI_IO_BITFLIPS) { <------><------><------>ubi_err(ubi, "unable to read EC header! PEB:%i err:%i", <------><------><------><------>pnum, err); <------><------><------>ret = err > 0 ? UBI_BAD_FASTMAP : err; <------><------><------>goto out; <------><------>} else if (err == UBI_IO_BITFLIPS) <------><------><------>scrub = 1; <------><------>/* <------><------> * Older UBI implementations have image_seq set to zero, so <------><------> * we shouldn't fail if image_seq == 0. <------><------> */ <------><------>image_seq = be32_to_cpu(ech->image_seq); <------><------>if (image_seq && (image_seq != ubi->image_seq)) { <------><------><------>ubi_err(ubi, "bad image seq: 0x%x, expected: 0x%x", <------><------><------><------>be32_to_cpu(ech->image_seq), ubi->image_seq); <------><------><------>ret = UBI_BAD_FASTMAP; <------><------><------>goto out; <------><------>} <------><------>err = ubi_io_read_vid_hdr(ubi, pnum, vb, 0); <------><------>if (err == UBI_IO_FF || err == UBI_IO_FF_BITFLIPS) { <------><------><------>unsigned long long ec = be64_to_cpu(ech->ec); <------><------><------>unmap_peb(ai, pnum); <------><------><------>dbg_bld("Adding PEB to free: %i", pnum); <------><------><------>if (err == UBI_IO_FF_BITFLIPS) <------><------><------><------>scrub = 1; <------><------><------>ret = add_aeb(ai, free, pnum, ec, scrub); <------><------><------>if (ret) <------><------><------><------>goto out; <------><------><------>continue; <------><------>} else if (err == 0 || err == UBI_IO_BITFLIPS) { <------><------><------>dbg_bld("Found non empty PEB:%i in pool", pnum); <------><------><------>if (err == UBI_IO_BITFLIPS) <------><------><------><------>scrub = 1; <------><------><------>new_aeb = ubi_alloc_aeb(ai, pnum, be64_to_cpu(ech->ec)); <------><------><------>if (!new_aeb) { <------><------><------><------>ret = -ENOMEM; <------><------><------><------>goto out; <------><------><------>} <------><------><------>new_aeb->lnum = be32_to_cpu(vh->lnum); <------><------><------>new_aeb->sqnum = be64_to_cpu(vh->sqnum); <------><------><------>new_aeb->copy_flag = vh->copy_flag; <------><------><------>new_aeb->scrub = scrub; <------><------><------>if (*max_sqnum < new_aeb->sqnum) <------><------><------><------>*max_sqnum = new_aeb->sqnum; <------><------><------>err = process_pool_aeb(ubi, ai, vh, new_aeb); <------><------><------>if (err) { <------><------><------><------>ret = err > 0 ? UBI_BAD_FASTMAP : err; <------><------><------><------>goto out; <------><------><------>} <------><------>} else { <------><------><------>/* We are paranoid and fall back to scanning mode */ <------><------><------>ubi_err(ubi, "fastmap pool PEBs contains damaged PEBs!"); <------><------><------>ret = err > 0 ? UBI_BAD_FASTMAP : err; <------><------><------>goto out; <------><------>} <------>} out: <------>ubi_free_vid_buf(vb); <------>kfree(ech); <------>return ret; } /** * count_fastmap_pebs - Counts the PEBs found by fastmap. * @ai: The UBI attach info object */ static int count_fastmap_pebs(struct ubi_attach_info *ai) { <------>struct ubi_ainf_peb *aeb; <------>struct ubi_ainf_volume *av; <------>struct rb_node *rb1, *rb2; <------>int n = 0; <------>list_for_each_entry(aeb, &ai->erase, u.list) <------><------>n++; <------>list_for_each_entry(aeb, &ai->free, u.list) <------><------>n++; <------>ubi_rb_for_each_entry(rb1, av, &ai->volumes, rb) <------><------>ubi_rb_for_each_entry(rb2, aeb, &av->root, u.rb) <------><------><------>n++; <------>return n; } /** * ubi_attach_fastmap - creates ubi_attach_info from a fastmap. * @ubi: UBI device object * @ai: UBI attach info object * @fm: the fastmap to be attached * * Returns 0 on success, UBI_BAD_FASTMAP if the found fastmap was unusable. * < 0 indicates an internal error. */ static int ubi_attach_fastmap(struct ubi_device *ubi, <------><------><------> struct ubi_attach_info *ai, <------><------><------> struct ubi_fastmap_layout *fm) { <------>struct list_head used, free; <------>struct ubi_ainf_volume *av; <------>struct ubi_ainf_peb *aeb, *tmp_aeb, *_tmp_aeb; <------>struct ubi_fm_sb *fmsb; <------>struct ubi_fm_hdr *fmhdr; <------>struct ubi_fm_scan_pool *fmpl, *fmpl_wl; <------>struct ubi_fm_ec *fmec; <------>struct ubi_fm_volhdr *fmvhdr; <------>struct ubi_fm_eba *fm_eba; <------>int ret, i, j, pool_size, wl_pool_size; <------>size_t fm_pos = 0, fm_size = ubi->fm_size; <------>unsigned long long max_sqnum = 0; <------>void *fm_raw = ubi->fm_buf; <------>INIT_LIST_HEAD(&used); <------>INIT_LIST_HEAD(&free); <------>ai->min_ec = UBI_MAX_ERASECOUNTER; <------>fmsb = (struct ubi_fm_sb *)(fm_raw); <------>ai->max_sqnum = fmsb->sqnum; <------>fm_pos += sizeof(struct ubi_fm_sb); <------>if (fm_pos >= fm_size) <------><------>goto fail_bad; <------>fmhdr = (struct ubi_fm_hdr *)(fm_raw + fm_pos); <------>fm_pos += sizeof(*fmhdr); <------>if (fm_pos >= fm_size) <------><------>goto fail_bad; <------>if (be32_to_cpu(fmhdr->magic) != UBI_FM_HDR_MAGIC) { <------><------>ubi_err(ubi, "bad fastmap header magic: 0x%x, expected: 0x%x", <------><------><------>be32_to_cpu(fmhdr->magic), UBI_FM_HDR_MAGIC); <------><------>goto fail_bad; <------>} <------>fmpl = (struct ubi_fm_scan_pool *)(fm_raw + fm_pos); <------>fm_pos += sizeof(*fmpl); <------>if (fm_pos >= fm_size) <------><------>goto fail_bad; <------>if (be32_to_cpu(fmpl->magic) != UBI_FM_POOL_MAGIC) { <------><------>ubi_err(ubi, "bad fastmap pool magic: 0x%x, expected: 0x%x", <------><------><------>be32_to_cpu(fmpl->magic), UBI_FM_POOL_MAGIC); <------><------>goto fail_bad; <------>} <------>fmpl_wl = (struct ubi_fm_scan_pool *)(fm_raw + fm_pos); <------>fm_pos += sizeof(*fmpl_wl); <------>if (fm_pos >= fm_size) <------><------>goto fail_bad; <------>if (be32_to_cpu(fmpl_wl->magic) != UBI_FM_POOL_MAGIC) { <------><------>ubi_err(ubi, "bad fastmap WL pool magic: 0x%x, expected: 0x%x", <------><------><------>be32_to_cpu(fmpl_wl->magic), UBI_FM_POOL_MAGIC); <------><------>goto fail_bad; <------>} <------>pool_size = be16_to_cpu(fmpl->size); <------>wl_pool_size = be16_to_cpu(fmpl_wl->size); <------>fm->max_pool_size = be16_to_cpu(fmpl->max_size); <------>fm->max_wl_pool_size = be16_to_cpu(fmpl_wl->max_size); <------>if (pool_size > UBI_FM_MAX_POOL_SIZE || pool_size < 0) { <------><------>ubi_err(ubi, "bad pool size: %i", pool_size); <------><------>goto fail_bad; <------>} <------>if (wl_pool_size > UBI_FM_MAX_POOL_SIZE || wl_pool_size < 0) { <------><------>ubi_err(ubi, "bad WL pool size: %i", wl_pool_size); <------><------>goto fail_bad; <------>} <------>if (fm->max_pool_size > UBI_FM_MAX_POOL_SIZE || <------> fm->max_pool_size < 0) { <------><------>ubi_err(ubi, "bad maximal pool size: %i", fm->max_pool_size); <------><------>goto fail_bad; <------>} <------>if (fm->max_wl_pool_size > UBI_FM_MAX_POOL_SIZE || <------> fm->max_wl_pool_size < 0) { <------><------>ubi_err(ubi, "bad maximal WL pool size: %i", <------><------><------>fm->max_wl_pool_size); <------><------>goto fail_bad; <------>} <------>/* read EC values from free list */ <------>for (i = 0; i < be32_to_cpu(fmhdr->free_peb_count); i++) { <------><------>fmec = (struct ubi_fm_ec *)(fm_raw + fm_pos); <------><------>fm_pos += sizeof(*fmec); <------><------>if (fm_pos >= fm_size) <------><------><------>goto fail_bad; <------><------>ret = add_aeb(ai, &ai->free, be32_to_cpu(fmec->pnum), <------><------><------> be32_to_cpu(fmec->ec), 0); <------><------>if (ret) <------><------><------>goto fail; <------>} <------>/* read EC values from used list */ <------>for (i = 0; i < be32_to_cpu(fmhdr->used_peb_count); i++) { <------><------>fmec = (struct ubi_fm_ec *)(fm_raw + fm_pos); <------><------>fm_pos += sizeof(*fmec); <------><------>if (fm_pos >= fm_size) <------><------><------>goto fail_bad; <------><------>ret = add_aeb(ai, &used, be32_to_cpu(fmec->pnum), <------><------><------> be32_to_cpu(fmec->ec), 0); <------><------>if (ret) <------><------><------>goto fail; <------>} <------>/* read EC values from scrub list */ <------>for (i = 0; i < be32_to_cpu(fmhdr->scrub_peb_count); i++) { <------><------>fmec = (struct ubi_fm_ec *)(fm_raw + fm_pos); <------><------>fm_pos += sizeof(*fmec); <------><------>if (fm_pos >= fm_size) <------><------><------>goto fail_bad; <------><------>ret = add_aeb(ai, &used, be32_to_cpu(fmec->pnum), <------><------><------> be32_to_cpu(fmec->ec), 1); <------><------>if (ret) <------><------><------>goto fail; <------>} <------>/* read EC values from erase list */ <------>for (i = 0; i < be32_to_cpu(fmhdr->erase_peb_count); i++) { <------><------>fmec = (struct ubi_fm_ec *)(fm_raw + fm_pos); <------><------>fm_pos += sizeof(*fmec); <------><------>if (fm_pos >= fm_size) <------><------><------>goto fail_bad; <------><------>ret = add_aeb(ai, &ai->erase, be32_to_cpu(fmec->pnum), <------><------><------> be32_to_cpu(fmec->ec), 1); <------><------>if (ret) <------><------><------>goto fail; <------>} <------>ai->mean_ec = div_u64(ai->ec_sum, ai->ec_count); <------>ai->bad_peb_count = be32_to_cpu(fmhdr->bad_peb_count); <------>/* Iterate over all volumes and read their EBA table */ <------>for (i = 0; i < be32_to_cpu(fmhdr->vol_count); i++) { <------><------>fmvhdr = (struct ubi_fm_volhdr *)(fm_raw + fm_pos); <------><------>fm_pos += sizeof(*fmvhdr); <------><------>if (fm_pos >= fm_size) <------><------><------>goto fail_bad; <------><------>if (be32_to_cpu(fmvhdr->magic) != UBI_FM_VHDR_MAGIC) { <------><------><------>ubi_err(ubi, "bad fastmap vol header magic: 0x%x, expected: 0x%x", <------><------><------><------>be32_to_cpu(fmvhdr->magic), UBI_FM_VHDR_MAGIC); <------><------><------>goto fail_bad; <------><------>} <------><------>av = add_vol(ai, be32_to_cpu(fmvhdr->vol_id), <------><------><------> be32_to_cpu(fmvhdr->used_ebs), <------><------><------> be32_to_cpu(fmvhdr->data_pad), <------><------><------> fmvhdr->vol_type, <------><------><------> be32_to_cpu(fmvhdr->last_eb_bytes)); <------><------>if (IS_ERR(av)) { <------><------><------>if (PTR_ERR(av) == -EEXIST) <------><------><------><------>ubi_err(ubi, "volume (ID %i) already exists", <------><------><------><------><------>fmvhdr->vol_id); <------><------><------>goto fail_bad; <------><------>} <------><------>ai->vols_found++; <------><------>if (ai->highest_vol_id < be32_to_cpu(fmvhdr->vol_id)) <------><------><------>ai->highest_vol_id = be32_to_cpu(fmvhdr->vol_id); <------><------>fm_eba = (struct ubi_fm_eba *)(fm_raw + fm_pos); <------><------>fm_pos += sizeof(*fm_eba); <------><------>fm_pos += (sizeof(__be32) * be32_to_cpu(fm_eba->reserved_pebs)); <------><------>if (fm_pos >= fm_size) <------><------><------>goto fail_bad; <------><------>if (be32_to_cpu(fm_eba->magic) != UBI_FM_EBA_MAGIC) { <------><------><------>ubi_err(ubi, "bad fastmap EBA header magic: 0x%x, expected: 0x%x", <------><------><------><------>be32_to_cpu(fm_eba->magic), UBI_FM_EBA_MAGIC); <------><------><------>goto fail_bad; <------><------>} <------><------>for (j = 0; j < be32_to_cpu(fm_eba->reserved_pebs); j++) { <------><------><------>int pnum = be32_to_cpu(fm_eba->pnum[j]); <------><------><------>if (pnum < 0) <------><------><------><------>continue; <------><------><------>aeb = NULL; <------><------><------>list_for_each_entry(tmp_aeb, &used, u.list) { <------><------><------><------>if (tmp_aeb->pnum == pnum) { <------><------><------><------><------>aeb = tmp_aeb; <------><------><------><------><------>break; <------><------><------><------>} <------><------><------>} <------><------><------>if (!aeb) { <------><------><------><------>ubi_err(ubi, "PEB %i is in EBA but not in used list", pnum); <------><------><------><------>goto fail_bad; <------><------><------>} <------><------><------>aeb->lnum = j; <------><------><------>if (av->highest_lnum <= aeb->lnum) <------><------><------><------>av->highest_lnum = aeb->lnum; <------><------><------>assign_aeb_to_av(ai, aeb, av); <------><------><------>dbg_bld("inserting PEB:%i (LEB %i) to vol %i", <------><------><------><------>aeb->pnum, aeb->lnum, av->vol_id); <------><------>} <------>} <------>ret = scan_pool(ubi, ai, fmpl->pebs, pool_size, &max_sqnum, &free); <------>if (ret) <------><------>goto fail; <------>ret = scan_pool(ubi, ai, fmpl_wl->pebs, wl_pool_size, &max_sqnum, &free); <------>if (ret) <------><------>goto fail; <------>if (max_sqnum > ai->max_sqnum) <------><------>ai->max_sqnum = max_sqnum; <------>list_for_each_entry_safe(tmp_aeb, _tmp_aeb, &free, u.list) <------><------>list_move_tail(&tmp_aeb->u.list, &ai->free); <------>list_for_each_entry_safe(tmp_aeb, _tmp_aeb, &used, u.list) <------><------>list_move_tail(&tmp_aeb->u.list, &ai->erase); <------>ubi_assert(list_empty(&free)); <------>/* <------> * If fastmap is leaking PEBs (must not happen), raise a <------> * fat warning and fall back to scanning mode. <------> * We do this here because in ubi_wl_init() it's too late <------> * and we cannot fall back to scanning. <------> */ <------>if (WARN_ON(count_fastmap_pebs(ai) != ubi->peb_count - <------><------> ai->bad_peb_count - fm->used_blocks)) <------><------>goto fail_bad; <------>return 0; fail_bad: <------>ret = UBI_BAD_FASTMAP; fail: <------>list_for_each_entry_safe(tmp_aeb, _tmp_aeb, &used, u.list) { <------><------>list_del(&tmp_aeb->u.list); <------><------>ubi_free_aeb(ai, tmp_aeb); <------>} <------>list_for_each_entry_safe(tmp_aeb, _tmp_aeb, &free, u.list) { <------><------>list_del(&tmp_aeb->u.list); <------><------>ubi_free_aeb(ai, tmp_aeb); <------>} <------>return ret; } /** * find_fm_anchor - find the most recent Fastmap superblock (anchor) * @ai: UBI attach info to be filled */ static int find_fm_anchor(struct ubi_attach_info *ai) { <------>int ret = -1; <------>struct ubi_ainf_peb *aeb; <------>unsigned long long max_sqnum = 0; <------>list_for_each_entry(aeb, &ai->fastmap, u.list) { <------><------>if (aeb->vol_id == UBI_FM_SB_VOLUME_ID && aeb->sqnum > max_sqnum) { <------><------><------>max_sqnum = aeb->sqnum; <------><------><------>ret = aeb->pnum; <------><------>} <------>} <------>return ret; } static struct ubi_ainf_peb *clone_aeb(struct ubi_attach_info *ai, <------><------><------><------> struct ubi_ainf_peb *old) { <------>struct ubi_ainf_peb *new; <------>new = ubi_alloc_aeb(ai, old->pnum, old->ec); <------>if (!new) <------><------>return NULL; <------>new->vol_id = old->vol_id; <------>new->sqnum = old->sqnum; <------>new->lnum = old->lnum; <------>new->scrub = old->scrub; <------>new->copy_flag = old->copy_flag; <------>return new; } /** * ubi_scan_fastmap - scan the fastmap. * @ubi: UBI device object * @ai: UBI attach info to be filled * @scan_ai: UBI attach info from the first 64 PEBs, * used to find the most recent Fastmap data structure * * Returns 0 on success, UBI_NO_FASTMAP if no fastmap was found, * UBI_BAD_FASTMAP if one was found but is not usable. * < 0 indicates an internal error. */ int ubi_scan_fastmap(struct ubi_device *ubi, struct ubi_attach_info *ai, <------><------> struct ubi_attach_info *scan_ai) { <------>struct ubi_fm_sb *fmsb, *fmsb2; <------>struct ubi_vid_io_buf *vb; <------>struct ubi_vid_hdr *vh; <------>struct ubi_ec_hdr *ech; <------>struct ubi_fastmap_layout *fm; <------>struct ubi_ainf_peb *aeb; <------>int i, used_blocks, pnum, fm_anchor, ret = 0; <------>size_t fm_size; <------>__be32 crc, tmp_crc; <------>unsigned long long sqnum = 0; <------>fm_anchor = find_fm_anchor(scan_ai); <------>if (fm_anchor < 0) <------><------>return UBI_NO_FASTMAP; <------>/* Copy all (possible) fastmap blocks into our new attach structure. */ <------>list_for_each_entry(aeb, &scan_ai->fastmap, u.list) { <------><------>struct ubi_ainf_peb *new; <------><------>new = clone_aeb(ai, aeb); <------><------>if (!new) <------><------><------>return -ENOMEM; <------><------>list_add(&new->u.list, &ai->fastmap); <------>} <------>down_write(&ubi->fm_protect); <------>memset(ubi->fm_buf, 0, ubi->fm_size); <------>fmsb = kmalloc(sizeof(*fmsb), GFP_KERNEL); <------>if (!fmsb) { <------><------>ret = -ENOMEM; <------><------>goto out; <------>} <------>fm = kzalloc(sizeof(*fm), GFP_KERNEL); <------>if (!fm) { <------><------>ret = -ENOMEM; <------><------>kfree(fmsb); <------><------>goto out; <------>} <------>ret = ubi_io_read_data(ubi, fmsb, fm_anchor, 0, sizeof(*fmsb)); <------>if (ret && ret != UBI_IO_BITFLIPS) <------><------>goto free_fm_sb; <------>else if (ret == UBI_IO_BITFLIPS) <------><------>fm->to_be_tortured[0] = 1; <------>if (be32_to_cpu(fmsb->magic) != UBI_FM_SB_MAGIC) { <------><------>ubi_err(ubi, "bad super block magic: 0x%x, expected: 0x%x", <------><------><------>be32_to_cpu(fmsb->magic), UBI_FM_SB_MAGIC); <------><------>ret = UBI_BAD_FASTMAP; <------><------>goto free_fm_sb; <------>} <------>if (fmsb->version != UBI_FM_FMT_VERSION) { <------><------>ubi_err(ubi, "bad fastmap version: %i, expected: %i", <------><------><------>fmsb->version, UBI_FM_FMT_VERSION); <------><------>ret = UBI_BAD_FASTMAP; <------><------>goto free_fm_sb; <------>} <------>used_blocks = be32_to_cpu(fmsb->used_blocks); <------>if (used_blocks > UBI_FM_MAX_BLOCKS || used_blocks < 1) { <------><------>ubi_err(ubi, "number of fastmap blocks is invalid: %i", <------><------><------>used_blocks); <------><------>ret = UBI_BAD_FASTMAP; <------><------>goto free_fm_sb; <------>} <------>fm_size = ubi->leb_size * used_blocks; <------>if (fm_size != ubi->fm_size) { <------><------>ubi_err(ubi, "bad fastmap size: %zi, expected: %zi", <------><------><------>fm_size, ubi->fm_size); <------><------>ret = UBI_BAD_FASTMAP; <------><------>goto free_fm_sb; <------>} <------>ech = kzalloc(ubi->ec_hdr_alsize, GFP_KERNEL); <------>if (!ech) { <------><------>ret = -ENOMEM; <------><------>goto free_fm_sb; <------>} <------>vb = ubi_alloc_vid_buf(ubi, GFP_KERNEL); <------>if (!vb) { <------><------>ret = -ENOMEM; <------><------>goto free_hdr; <------>} <------>vh = ubi_get_vid_hdr(vb); <------>for (i = 0; i < used_blocks; i++) { <------><------>int image_seq; <------><------>pnum = be32_to_cpu(fmsb->block_loc[i]); <------><------>if (ubi_io_is_bad(ubi, pnum)) { <------><------><------>ret = UBI_BAD_FASTMAP; <------><------><------>goto free_hdr; <------><------>} <------><------>if (i == 0 && pnum != fm_anchor) { <------><------><------>ubi_err(ubi, "Fastmap anchor PEB mismatch: PEB: %i vs. %i", <------><------><------><------>pnum, fm_anchor); <------><------><------>ret = UBI_BAD_FASTMAP; <------><------><------>goto free_hdr; <------><------>} <------><------>ret = ubi_io_read_ec_hdr(ubi, pnum, ech, 0); <------><------>if (ret && ret != UBI_IO_BITFLIPS) { <------><------><------>ubi_err(ubi, "unable to read fastmap block# %i EC (PEB: %i)", <------><------><------><------>i, pnum); <------><------><------>if (ret > 0) <------><------><------><------>ret = UBI_BAD_FASTMAP; <------><------><------>goto free_hdr; <------><------>} else if (ret == UBI_IO_BITFLIPS) <------><------><------>fm->to_be_tortured[i] = 1; <------><------>image_seq = be32_to_cpu(ech->image_seq); <------><------>if (!ubi->image_seq) <------><------><------>ubi->image_seq = image_seq; <------><------>/* <------><------> * Older UBI implementations have image_seq set to zero, so <------><------> * we shouldn't fail if image_seq == 0. <------><------> */ <------><------>if (image_seq && (image_seq != ubi->image_seq)) { <------><------><------>ubi_err(ubi, "wrong image seq:%d instead of %d", <------><------><------><------>be32_to_cpu(ech->image_seq), ubi->image_seq); <------><------><------>ret = UBI_BAD_FASTMAP; <------><------><------>goto free_hdr; <------><------>} <------><------>ret = ubi_io_read_vid_hdr(ubi, pnum, vb, 0); <------><------>if (ret && ret != UBI_IO_BITFLIPS) { <------><------><------>ubi_err(ubi, "unable to read fastmap block# %i (PEB: %i)", <------><------><------><------>i, pnum); <------><------><------>goto free_hdr; <------><------>} <------><------>if (i == 0) { <------><------><------>if (be32_to_cpu(vh->vol_id) != UBI_FM_SB_VOLUME_ID) { <------><------><------><------>ubi_err(ubi, "bad fastmap anchor vol_id: 0x%x, expected: 0x%x", <------><------><------><------><------>be32_to_cpu(vh->vol_id), <------><------><------><------><------>UBI_FM_SB_VOLUME_ID); <------><------><------><------>ret = UBI_BAD_FASTMAP; <------><------><------><------>goto free_hdr; <------><------><------>} <------><------>} else { <------><------><------>if (be32_to_cpu(vh->vol_id) != UBI_FM_DATA_VOLUME_ID) { <------><------><------><------>ubi_err(ubi, "bad fastmap data vol_id: 0x%x, expected: 0x%x", <------><------><------><------><------>be32_to_cpu(vh->vol_id), <------><------><------><------><------>UBI_FM_DATA_VOLUME_ID); <------><------><------><------>ret = UBI_BAD_FASTMAP; <------><------><------><------>goto free_hdr; <------><------><------>} <------><------>} <------><------>if (sqnum < be64_to_cpu(vh->sqnum)) <------><------><------>sqnum = be64_to_cpu(vh->sqnum); <------><------>ret = ubi_io_read_data(ubi, ubi->fm_buf + (ubi->leb_size * i), <------><------><------><------> pnum, 0, ubi->leb_size); <------><------>if (ret && ret != UBI_IO_BITFLIPS) { <------><------><------>ubi_err(ubi, "unable to read fastmap block# %i (PEB: %i, " <------><------><------><------>"err: %i)", i, pnum, ret); <------><------><------>goto free_hdr; <------><------>} <------>} <------>kfree(fmsb); <------>fmsb = NULL; <------>fmsb2 = (struct ubi_fm_sb *)(ubi->fm_buf); <------>tmp_crc = be32_to_cpu(fmsb2->data_crc); <------>fmsb2->data_crc = 0; <------>crc = crc32(UBI_CRC32_INIT, ubi->fm_buf, fm_size); <------>if (crc != tmp_crc) { <------><------>ubi_err(ubi, "fastmap data CRC is invalid"); <------><------>ubi_err(ubi, "CRC should be: 0x%x, calc: 0x%x", <------><------><------>tmp_crc, crc); <------><------>ret = UBI_BAD_FASTMAP; <------><------>goto free_hdr; <------>} <------>fmsb2->sqnum = sqnum; <------>fm->used_blocks = used_blocks; <------>ret = ubi_attach_fastmap(ubi, ai, fm); <------>if (ret) { <------><------>if (ret > 0) <------><------><------>ret = UBI_BAD_FASTMAP; <------><------>goto free_hdr; <------>} <------>for (i = 0; i < used_blocks; i++) { <------><------>struct ubi_wl_entry *e; <------><------>e = kmem_cache_alloc(ubi_wl_entry_slab, GFP_KERNEL); <------><------>if (!e) { <------><------><------>while (i--) <------><------><------><------>kmem_cache_free(ubi_wl_entry_slab, fm->e[i]); <------><------><------>ret = -ENOMEM; <------><------><------>goto free_hdr; <------><------>} <------><------>e->pnum = be32_to_cpu(fmsb2->block_loc[i]); <------><------>e->ec = be32_to_cpu(fmsb2->block_ec[i]); <------><------>fm->e[i] = e; <------>} <------>ubi->fm = fm; <------>ubi->fm_pool.max_size = ubi->fm->max_pool_size; <------>ubi->fm_wl_pool.max_size = ubi->fm->max_wl_pool_size; <------>ubi_msg(ubi, "attached by fastmap"); <------>ubi_msg(ubi, "fastmap pool size: %d", ubi->fm_pool.max_size); <------>ubi_msg(ubi, "fastmap WL pool size: %d", <------><------>ubi->fm_wl_pool.max_size); <------>ubi->fm_disabled = 0; <------>ubi->fast_attach = 1; <------>ubi_free_vid_buf(vb); <------>kfree(ech); out: <------>up_write(&ubi->fm_protect); <------>if (ret == UBI_BAD_FASTMAP) <------><------>ubi_err(ubi, "Attach by fastmap failed, doing a full scan!"); <------>return ret; free_hdr: <------>ubi_free_vid_buf(vb); <------>kfree(ech); free_fm_sb: <------>kfree(fmsb); <------>kfree(fm); <------>goto out; } int ubi_fastmap_init_checkmap(struct ubi_volume *vol, int leb_count) { <------>struct ubi_device *ubi = vol->ubi; <------>if (!ubi->fast_attach) <------><------>return 0; <------>vol->checkmap = kcalloc(BITS_TO_LONGS(leb_count), sizeof(unsigned long), <------><------><------><------>GFP_KERNEL); <------>if (!vol->checkmap) <------><------>return -ENOMEM; <------>return 0; } void ubi_fastmap_destroy_checkmap(struct ubi_volume *vol) { <------>kfree(vol->checkmap); } /** * ubi_write_fastmap - writes a fastmap. * @ubi: UBI device object * @new_fm: the to be written fastmap * * Returns 0 on success, < 0 indicates an internal error. */ static int ubi_write_fastmap(struct ubi_device *ubi, <------><------><------> struct ubi_fastmap_layout *new_fm) { <------>size_t fm_pos = 0; <------>void *fm_raw; <------>struct ubi_fm_sb *fmsb; <------>struct ubi_fm_hdr *fmh; <------>struct ubi_fm_scan_pool *fmpl, *fmpl_wl; <------>struct ubi_fm_ec *fec; <------>struct ubi_fm_volhdr *fvh; <------>struct ubi_fm_eba *feba; <------>struct ubi_wl_entry *wl_e; <------>struct ubi_volume *vol; <------>struct ubi_vid_io_buf *avbuf, *dvbuf; <------>struct ubi_vid_hdr *avhdr, *dvhdr; <------>struct ubi_work *ubi_wrk; <------>struct rb_node *tmp_rb; <------>int ret, i, j, free_peb_count, used_peb_count, vol_count; <------>int scrub_peb_count, erase_peb_count; <------>unsigned long *seen_pebs; <------>fm_raw = ubi->fm_buf; <------>memset(ubi->fm_buf, 0, ubi->fm_size); <------>avbuf = new_fm_vbuf(ubi, UBI_FM_SB_VOLUME_ID); <------>if (!avbuf) { <------><------>ret = -ENOMEM; <------><------>goto out; <------>} <------>dvbuf = new_fm_vbuf(ubi, UBI_FM_DATA_VOLUME_ID); <------>if (!dvbuf) { <------><------>ret = -ENOMEM; <------><------>goto out_free_avbuf; <------>} <------>avhdr = ubi_get_vid_hdr(avbuf); <------>dvhdr = ubi_get_vid_hdr(dvbuf); <------>seen_pebs = init_seen(ubi); <------>if (IS_ERR(seen_pebs)) { <------><------>ret = PTR_ERR(seen_pebs); <------><------>goto out_free_dvbuf; <------>} <------>spin_lock(&ubi->volumes_lock); <------>spin_lock(&ubi->wl_lock); <------>fmsb = (struct ubi_fm_sb *)fm_raw; <------>fm_pos += sizeof(*fmsb); <------>ubi_assert(fm_pos <= ubi->fm_size); <------>fmh = (struct ubi_fm_hdr *)(fm_raw + fm_pos); <------>fm_pos += sizeof(*fmh); <------>ubi_assert(fm_pos <= ubi->fm_size); <------>fmsb->magic = cpu_to_be32(UBI_FM_SB_MAGIC); <------>fmsb->version = UBI_FM_FMT_VERSION; <------>fmsb->used_blocks = cpu_to_be32(new_fm->used_blocks); <------>/* the max sqnum will be filled in while *reading* the fastmap */ <------>fmsb->sqnum = 0; <------>fmh->magic = cpu_to_be32(UBI_FM_HDR_MAGIC); <------>free_peb_count = 0; <------>used_peb_count = 0; <------>scrub_peb_count = 0; <------>erase_peb_count = 0; <------>vol_count = 0; <------>fmpl = (struct ubi_fm_scan_pool *)(fm_raw + fm_pos); <------>fm_pos += sizeof(*fmpl); <------>fmpl->magic = cpu_to_be32(UBI_FM_POOL_MAGIC); <------>fmpl->size = cpu_to_be16(ubi->fm_pool.size); <------>fmpl->max_size = cpu_to_be16(ubi->fm_pool.max_size); <------>for (i = 0; i < ubi->fm_pool.size; i++) { <------><------>fmpl->pebs[i] = cpu_to_be32(ubi->fm_pool.pebs[i]); <------><------>set_seen(ubi, ubi->fm_pool.pebs[i], seen_pebs); <------>} <------>fmpl_wl = (struct ubi_fm_scan_pool *)(fm_raw + fm_pos); <------>fm_pos += sizeof(*fmpl_wl); <------>fmpl_wl->magic = cpu_to_be32(UBI_FM_POOL_MAGIC); <------>fmpl_wl->size = cpu_to_be16(ubi->fm_wl_pool.size); <------>fmpl_wl->max_size = cpu_to_be16(ubi->fm_wl_pool.max_size); <------>for (i = 0; i < ubi->fm_wl_pool.size; i++) { <------><------>fmpl_wl->pebs[i] = cpu_to_be32(ubi->fm_wl_pool.pebs[i]); <------><------>set_seen(ubi, ubi->fm_wl_pool.pebs[i], seen_pebs); <------>} <------>ubi_for_each_free_peb(ubi, wl_e, tmp_rb) { <------><------>fec = (struct ubi_fm_ec *)(fm_raw + fm_pos); <------><------>fec->pnum = cpu_to_be32(wl_e->pnum); <------><------>set_seen(ubi, wl_e->pnum, seen_pebs); <------><------>fec->ec = cpu_to_be32(wl_e->ec); <------><------>free_peb_count++; <------><------>fm_pos += sizeof(*fec); <------><------>ubi_assert(fm_pos <= ubi->fm_size); <------>} <------>if (ubi->fm_next_anchor) { <------><------>fec = (struct ubi_fm_ec *)(fm_raw + fm_pos); <------><------>fec->pnum = cpu_to_be32(ubi->fm_next_anchor->pnum); <------><------>set_seen(ubi, ubi->fm_next_anchor->pnum, seen_pebs); <------><------>fec->ec = cpu_to_be32(ubi->fm_next_anchor->ec); <------><------>free_peb_count++; <------><------>fm_pos += sizeof(*fec); <------><------>ubi_assert(fm_pos <= ubi->fm_size); <------>} <------>fmh->free_peb_count = cpu_to_be32(free_peb_count); <------>ubi_for_each_used_peb(ubi, wl_e, tmp_rb) { <------><------>fec = (struct ubi_fm_ec *)(fm_raw + fm_pos); <------><------>fec->pnum = cpu_to_be32(wl_e->pnum); <------><------>set_seen(ubi, wl_e->pnum, seen_pebs); <------><------>fec->ec = cpu_to_be32(wl_e->ec); <------><------>used_peb_count++; <------><------>fm_pos += sizeof(*fec); <------><------>ubi_assert(fm_pos <= ubi->fm_size); <------>} <------>ubi_for_each_protected_peb(ubi, i, wl_e) { <------><------>fec = (struct ubi_fm_ec *)(fm_raw + fm_pos); <------><------>fec->pnum = cpu_to_be32(wl_e->pnum); <------><------>set_seen(ubi, wl_e->pnum, seen_pebs); <------><------>fec->ec = cpu_to_be32(wl_e->ec); <------><------>used_peb_count++; <------><------>fm_pos += sizeof(*fec); <------><------>ubi_assert(fm_pos <= ubi->fm_size); <------>} <------>fmh->used_peb_count = cpu_to_be32(used_peb_count); <------>ubi_for_each_scrub_peb(ubi, wl_e, tmp_rb) { <------><------>fec = (struct ubi_fm_ec *)(fm_raw + fm_pos); <------><------>fec->pnum = cpu_to_be32(wl_e->pnum); <------><------>set_seen(ubi, wl_e->pnum, seen_pebs); <------><------>fec->ec = cpu_to_be32(wl_e->ec); <------><------>scrub_peb_count++; <------><------>fm_pos += sizeof(*fec); <------><------>ubi_assert(fm_pos <= ubi->fm_size); <------>} <------>fmh->scrub_peb_count = cpu_to_be32(scrub_peb_count); <------>list_for_each_entry(ubi_wrk, &ubi->works, list) { <------><------>if (ubi_is_erase_work(ubi_wrk)) { <------><------><------>wl_e = ubi_wrk->e; <------><------><------>ubi_assert(wl_e); <------><------><------>fec = (struct ubi_fm_ec *)(fm_raw + fm_pos); <------><------><------>fec->pnum = cpu_to_be32(wl_e->pnum); <------><------><------>set_seen(ubi, wl_e->pnum, seen_pebs); <------><------><------>fec->ec = cpu_to_be32(wl_e->ec); <------><------><------>erase_peb_count++; <------><------><------>fm_pos += sizeof(*fec); <------><------><------>ubi_assert(fm_pos <= ubi->fm_size); <------><------>} <------>} <------>fmh->erase_peb_count = cpu_to_be32(erase_peb_count); <------>for (i = 0; i < UBI_MAX_VOLUMES + UBI_INT_VOL_COUNT; i++) { <------><------>vol = ubi->volumes[i]; <------><------>if (!vol) <------><------><------>continue; <------><------>vol_count++; <------><------>fvh = (struct ubi_fm_volhdr *)(fm_raw + fm_pos); <------><------>fm_pos += sizeof(*fvh); <------><------>ubi_assert(fm_pos <= ubi->fm_size); <------><------>fvh->magic = cpu_to_be32(UBI_FM_VHDR_MAGIC); <------><------>fvh->vol_id = cpu_to_be32(vol->vol_id); <------><------>fvh->vol_type = vol->vol_type; <------><------>fvh->used_ebs = cpu_to_be32(vol->used_ebs); <------><------>fvh->data_pad = cpu_to_be32(vol->data_pad); <------><------>fvh->last_eb_bytes = cpu_to_be32(vol->last_eb_bytes); <------><------>ubi_assert(vol->vol_type == UBI_DYNAMIC_VOLUME || <------><------><------>vol->vol_type == UBI_STATIC_VOLUME); <------><------>feba = (struct ubi_fm_eba *)(fm_raw + fm_pos); <------><------>fm_pos += sizeof(*feba) + (sizeof(__be32) * vol->reserved_pebs); <------><------>ubi_assert(fm_pos <= ubi->fm_size); <------><------>for (j = 0; j < vol->reserved_pebs; j++) { <------><------><------>struct ubi_eba_leb_desc ldesc; <------><------><------>ubi_eba_get_ldesc(vol, j, &ldesc); <------><------><------>feba->pnum[j] = cpu_to_be32(ldesc.pnum); <------><------>} <------><------>feba->reserved_pebs = cpu_to_be32(j); <------><------>feba->magic = cpu_to_be32(UBI_FM_EBA_MAGIC); <------>} <------>fmh->vol_count = cpu_to_be32(vol_count); <------>fmh->bad_peb_count = cpu_to_be32(ubi->bad_peb_count); <------>avhdr->sqnum = cpu_to_be64(ubi_next_sqnum(ubi)); <------>avhdr->lnum = 0; <------>spin_unlock(&ubi->wl_lock); <------>spin_unlock(&ubi->volumes_lock); <------>dbg_bld("writing fastmap SB to PEB %i", new_fm->e[0]->pnum); <------>ret = ubi_io_write_vid_hdr(ubi, new_fm->e[0]->pnum, avbuf); <------>if (ret) { <------><------>ubi_err(ubi, "unable to write vid_hdr to fastmap SB!"); <------><------>goto out_free_seen; <------>} <------>for (i = 0; i < new_fm->used_blocks; i++) { <------><------>fmsb->block_loc[i] = cpu_to_be32(new_fm->e[i]->pnum); <------><------>set_seen(ubi, new_fm->e[i]->pnum, seen_pebs); <------><------>fmsb->block_ec[i] = cpu_to_be32(new_fm->e[i]->ec); <------>} <------>fmsb->data_crc = 0; <------>fmsb->data_crc = cpu_to_be32(crc32(UBI_CRC32_INIT, fm_raw, <------><------><------><------><------> ubi->fm_size)); <------>for (i = 1; i < new_fm->used_blocks; i++) { <------><------>dvhdr->sqnum = cpu_to_be64(ubi_next_sqnum(ubi)); <------><------>dvhdr->lnum = cpu_to_be32(i); <------><------>dbg_bld("writing fastmap data to PEB %i sqnum %llu", <------><------><------>new_fm->e[i]->pnum, be64_to_cpu(dvhdr->sqnum)); <------><------>ret = ubi_io_write_vid_hdr(ubi, new_fm->e[i]->pnum, dvbuf); <------><------>if (ret) { <------><------><------>ubi_err(ubi, "unable to write vid_hdr to PEB %i!", <------><------><------><------>new_fm->e[i]->pnum); <------><------><------>goto out_free_seen; <------><------>} <------>} <------>for (i = 0; i < new_fm->used_blocks; i++) { <------><------>ret = ubi_io_write_data(ubi, fm_raw + (i * ubi->leb_size), <------><------><------><------><------>new_fm->e[i]->pnum, 0, ubi->leb_size); <------><------>if (ret) { <------><------><------>ubi_err(ubi, "unable to write fastmap to PEB %i!", <------><------><------><------>new_fm->e[i]->pnum); <------><------><------>goto out_free_seen; <------><------>} <------>} <------>ubi_assert(new_fm); <------>ubi->fm = new_fm; <------>ret = self_check_seen(ubi, seen_pebs); <------>dbg_bld("fastmap written!"); out_free_seen: <------>free_seen(seen_pebs); out_free_dvbuf: <------>ubi_free_vid_buf(dvbuf); out_free_avbuf: <------>ubi_free_vid_buf(avbuf); out: <------>return ret; } /** * erase_block - Manually erase a PEB. * @ubi: UBI device object * @pnum: PEB to be erased * * Returns the new EC value on success, < 0 indicates an internal error. */ static int erase_block(struct ubi_device *ubi, int pnum) { <------>int ret; <------>struct ubi_ec_hdr *ec_hdr; <------>long long ec; <------>ec_hdr = kzalloc(ubi->ec_hdr_alsize, GFP_KERNEL); <------>if (!ec_hdr) <------><------>return -ENOMEM; <------>ret = ubi_io_read_ec_hdr(ubi, pnum, ec_hdr, 0); <------>if (ret < 0) <------><------>goto out; <------>else if (ret && ret != UBI_IO_BITFLIPS) { <------><------>ret = -EINVAL; <------><------>goto out; <------>} <------>ret = ubi_io_sync_erase(ubi, pnum, 0); <------>if (ret < 0) <------><------>goto out; <------>ec = be64_to_cpu(ec_hdr->ec); <------>ec += ret; <------>if (ec > UBI_MAX_ERASECOUNTER) { <------><------>ret = -EINVAL; <------><------>goto out; <------>} <------>ec_hdr->ec = cpu_to_be64(ec); <------>ret = ubi_io_write_ec_hdr(ubi, pnum, ec_hdr); <------>if (ret < 0) <------><------>goto out; <------>ret = ec; out: <------>kfree(ec_hdr); <------>return ret; } /** * invalidate_fastmap - destroys a fastmap. * @ubi: UBI device object * * This function ensures that upon next UBI attach a full scan * is issued. We need this if UBI is about to write a new fastmap * but is unable to do so. In this case we have two options: * a) Make sure that the current fastmap will not be usued upon * attach time and contine or b) fall back to RO mode to have the * current fastmap in a valid state. * Returns 0 on success, < 0 indicates an internal error. */ static int invalidate_fastmap(struct ubi_device *ubi) { <------>int ret; <------>struct ubi_fastmap_layout *fm; <------>struct ubi_wl_entry *e; <------>struct ubi_vid_io_buf *vb = NULL; <------>struct ubi_vid_hdr *vh; <------>if (!ubi->fm) <------><------>return 0; <------>ubi->fm = NULL; <------>ret = -ENOMEM; <------>fm = kzalloc(sizeof(*fm), GFP_KERNEL); <------>if (!fm) <------><------>goto out; <------>vb = new_fm_vbuf(ubi, UBI_FM_SB_VOLUME_ID); <------>if (!vb) <------><------>goto out_free_fm; <------>vh = ubi_get_vid_hdr(vb); <------>ret = -ENOSPC; <------>e = ubi_wl_get_fm_peb(ubi, 1); <------>if (!e) <------><------>goto out_free_fm; <------>/* <------> * Create fake fastmap such that UBI will fall back <------> * to scanning mode. <------> */ <------>vh->sqnum = cpu_to_be64(ubi_next_sqnum(ubi)); <------>ret = ubi_io_write_vid_hdr(ubi, e->pnum, vb); <------>if (ret < 0) { <------><------>ubi_wl_put_fm_peb(ubi, e, 0, 0); <------><------>goto out_free_fm; <------>} <------>fm->used_blocks = 1; <------>fm->e[0] = e; <------>ubi->fm = fm; out: <------>ubi_free_vid_buf(vb); <------>return ret; out_free_fm: <------>kfree(fm); <------>goto out; } /** * return_fm_pebs - returns all PEBs used by a fastmap back to the * WL sub-system. * @ubi: UBI device object * @fm: fastmap layout object */ static void return_fm_pebs(struct ubi_device *ubi, <------><------><------> struct ubi_fastmap_layout *fm) { <------>int i; <------>if (!fm) <------><------>return; <------>for (i = 0; i < fm->used_blocks; i++) { <------><------>if (fm->e[i]) { <------><------><------>ubi_wl_put_fm_peb(ubi, fm->e[i], i, <------><------><------><------><------> fm->to_be_tortured[i]); <------><------><------>fm->e[i] = NULL; <------><------>} <------>} } /** * ubi_update_fastmap - will be called by UBI if a volume changes or * a fastmap pool becomes full. * @ubi: UBI device object * * Returns 0 on success, < 0 indicates an internal error. */ int ubi_update_fastmap(struct ubi_device *ubi) { <------>int ret, i, j; <------>struct ubi_fastmap_layout *new_fm, *old_fm; <------>struct ubi_wl_entry *tmp_e; <------>down_write(&ubi->fm_protect); <------>down_write(&ubi->work_sem); <------>down_write(&ubi->fm_eba_sem); <------>ubi_refill_pools(ubi); <------>if (ubi->ro_mode || ubi->fm_disabled) { <------><------>up_write(&ubi->fm_eba_sem); <------><------>up_write(&ubi->work_sem); <------><------>up_write(&ubi->fm_protect); <------><------>return 0; <------>} <------>new_fm = kzalloc(sizeof(*new_fm), GFP_KERNEL); <------>if (!new_fm) { <------><------>up_write(&ubi->fm_eba_sem); <------><------>up_write(&ubi->work_sem); <------><------>up_write(&ubi->fm_protect); <------><------>return -ENOMEM; <------>} <------>new_fm->used_blocks = ubi->fm_size / ubi->leb_size; <------>old_fm = ubi->fm; <------>ubi->fm = NULL; <------>if (new_fm->used_blocks > UBI_FM_MAX_BLOCKS) { <------><------>ubi_err(ubi, "fastmap too large"); <------><------>ret = -ENOSPC; <------><------>goto err; <------>} <------>for (i = 1; i < new_fm->used_blocks; i++) { <------><------>spin_lock(&ubi->wl_lock); <------><------>tmp_e = ubi_wl_get_fm_peb(ubi, 0); <------><------>spin_unlock(&ubi->wl_lock); <------><------>if (!tmp_e) { <------><------><------>if (old_fm && old_fm->e[i]) { <------><------><------><------>ret = erase_block(ubi, old_fm->e[i]->pnum); <------><------><------><------>if (ret < 0) { <------><------><------><------><------>ubi_err(ubi, "could not erase old fastmap PEB"); <------><------><------><------><------>for (j = 1; j < i; j++) { <------><------><------><------><------><------>ubi_wl_put_fm_peb(ubi, new_fm->e[j], <------><------><------><------><------><------><------><------> j, 0); <------><------><------><------><------><------>new_fm->e[j] = NULL; <------><------><------><------><------>} <------><------><------><------><------>goto err; <------><------><------><------>} <------><------><------><------>new_fm->e[i] = old_fm->e[i]; <------><------><------><------>old_fm->e[i] = NULL; <------><------><------>} else { <------><------><------><------>ubi_err(ubi, "could not get any free erase block"); <------><------><------><------>for (j = 1; j < i; j++) { <------><------><------><------><------>ubi_wl_put_fm_peb(ubi, new_fm->e[j], j, 0); <------><------><------><------><------>new_fm->e[j] = NULL; <------><------><------><------>} <------><------><------><------>ret = -ENOSPC; <------><------><------><------>goto err; <------><------><------>} <------><------>} else { <------><------><------>new_fm->e[i] = tmp_e; <------><------><------>if (old_fm && old_fm->e[i]) { <------><------><------><------>ubi_wl_put_fm_peb(ubi, old_fm->e[i], i, <------><------><------><------><------><------> old_fm->to_be_tortured[i]); <------><------><------><------>old_fm->e[i] = NULL; <------><------><------>} <------><------>} <------>} <------>/* Old fastmap is larger than the new one */ <------>if (old_fm && new_fm->used_blocks < old_fm->used_blocks) { <------><------>for (i = new_fm->used_blocks; i < old_fm->used_blocks; i++) { <------><------><------>ubi_wl_put_fm_peb(ubi, old_fm->e[i], i, <------><------><------><------><------> old_fm->to_be_tortured[i]); <------><------><------>old_fm->e[i] = NULL; <------><------>} <------>} <------>spin_lock(&ubi->wl_lock); <------>tmp_e = ubi->fm_anchor; <------>ubi->fm_anchor = NULL; <------>spin_unlock(&ubi->wl_lock); <------>if (old_fm) { <------><------>/* no fresh anchor PEB was found, reuse the old one */ <------><------>if (!tmp_e) { <------><------><------>ret = erase_block(ubi, old_fm->e[0]->pnum); <------><------><------>if (ret < 0) { <------><------><------><------>ubi_err(ubi, "could not erase old anchor PEB"); <------><------><------><------>for (i = 1; i < new_fm->used_blocks; i++) { <------><------><------><------><------>ubi_wl_put_fm_peb(ubi, new_fm->e[i], <------><------><------><------><------><------><------> i, 0); <------><------><------><------><------>new_fm->e[i] = NULL; <------><------><------><------>} <------><------><------><------>goto err; <------><------><------>} <------><------><------>new_fm->e[0] = old_fm->e[0]; <------><------><------>new_fm->e[0]->ec = ret; <------><------><------>old_fm->e[0] = NULL; <------><------>} else { <------><------><------>/* we've got a new anchor PEB, return the old one */ <------><------><------>ubi_wl_put_fm_peb(ubi, old_fm->e[0], 0, <------><------><------><------><------> old_fm->to_be_tortured[0]); <------><------><------>new_fm->e[0] = tmp_e; <------><------><------>old_fm->e[0] = NULL; <------><------>} <------>} else { <------><------>if (!tmp_e) { <------><------><------>ubi_err(ubi, "could not find any anchor PEB"); <------><------><------>for (i = 1; i < new_fm->used_blocks; i++) { <------><------><------><------>ubi_wl_put_fm_peb(ubi, new_fm->e[i], i, 0); <------><------><------><------>new_fm->e[i] = NULL; <------><------><------>} <------><------><------>ret = -ENOSPC; <------><------><------>goto err; <------><------>} <------><------>new_fm->e[0] = tmp_e; <------>} <------>ret = ubi_write_fastmap(ubi, new_fm); <------>if (ret) <------><------>goto err; out_unlock: <------>up_write(&ubi->fm_eba_sem); <------>up_write(&ubi->work_sem); <------>up_write(&ubi->fm_protect); <------>kfree(old_fm); <------>ubi_ensure_anchor_pebs(ubi); <------>return ret; err: <------>ubi_warn(ubi, "Unable to write new fastmap, err=%i", ret); <------>ret = invalidate_fastmap(ubi); <------>if (ret < 0) { <------><------>ubi_err(ubi, "Unable to invalidate current fastmap!"); <------><------>ubi_ro_mode(ubi); <------>} else { <------><------>return_fm_pebs(ubi, old_fm); <------><------>return_fm_pebs(ubi, new_fm); <------><------>ret = 0; <------>} <------>kfree(new_fm); <------>goto out_unlock; }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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