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UBI: Fastmap: Remove eba_orphans logic

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This logic is in vain as we treat protected PEBs also as used, so this
case must not happen.
If a PEB is found which is in the EBA table but not known as used
has to be issued as fatal error.

Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Richard Weinberger 2014-10-07 21:39:20 +02:00
parent a83832a7c8
commit d141a8ef21
1 changed files with 8 additions and 83 deletions
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91
drivers/mtd/ubi/fastmap.c
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@ -376,7 +376,6 @@ static void unmap_peb(struct ubi_attach_info *ai, int pnum)
* @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
* @eba_orphans: list of PEBs which need to be scanned
* @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.
@ -384,12 +383,12 @@ static void unmap_peb(struct ubi_attach_info *ai, int pnum)
*/
static int scan_pool(struct ubi_device *ubi, struct ubi_attach_info *ai,
int *pebs, int pool_size, unsigned long long *max_sqnum,
struct list_head *eba_orphans, struct list_head *free)
struct list_head *free)
{
struct ubi_vid_hdr *vh;
struct ubi_ec_hdr *ech;
struct ubi_ainf_peb *new_aeb, *tmp_aeb;
int i, pnum, err, found_orphan, ret = 0;
struct ubi_ainf_peb *new_aeb;
int i, pnum, err, ret = 0;
ech = kzalloc(ubi->ec_hdr_alsize, GFP_KERNEL);
if (!ech)
@ -457,18 +456,6 @@ static int scan_pool(struct ubi_device *ubi, struct ubi_attach_info *ai,
if (err == UBI_IO_BITFLIPS)
scrub = 1;
found_orphan = 0;
list_for_each_entry(tmp_aeb, eba_orphans, u.list) {
if (tmp_aeb->pnum == pnum) {
found_orphan = 1;
break;
}
}
if (found_orphan) {
list_del(&tmp_aeb->u.list);
kmem_cache_free(ai->aeb_slab_cache, tmp_aeb);
}
new_aeb = kmem_cache_alloc(ai->aeb_slab_cache,
GFP_KERNEL);
if (!new_aeb) {
@ -543,10 +530,9 @@ static int ubi_attach_fastmap(struct ubi_device *ubi,
struct ubi_attach_info *ai,
struct ubi_fastmap_layout *fm)
{
struct list_head used, eba_orphans, free;
struct list_head used, free;
struct ubi_ainf_volume *av;
struct ubi_ainf_peb *aeb, *tmp_aeb, *_tmp_aeb;
struct ubi_ec_hdr *ech;
struct ubi_fm_sb *fmsb;
struct ubi_fm_hdr *fmhdr;
struct ubi_fm_scan_pool *fmpl1, *fmpl2;
@ -560,7 +546,6 @@ static int ubi_attach_fastmap(struct ubi_device *ubi,
INIT_LIST_HEAD(&used);
INIT_LIST_HEAD(&free);
INIT_LIST_HEAD(&eba_orphans);
ai->min_ec = UBI_MAX_ERASECOUNTER;
fmsb = (struct ubi_fm_sb *)(fm_raw);
@ -728,28 +713,9 @@ static int ubi_attach_fastmap(struct ubi_device *ubi,
}
}
/* This can happen if a PEB is already in an EBA known
* by this fastmap but the PEB itself is not in the used
* list.
* In this case the PEB can be within the fastmap pool
* or while writing the fastmap it was in the protection
* queue.
*/
if (!aeb) {
aeb = kmem_cache_alloc(ai->aeb_slab_cache,
GFP_KERNEL);
if (!aeb) {
ret = -ENOMEM;
goto fail;
}
aeb->lnum = j;
aeb->pnum = be32_to_cpu(fm_eba->pnum[j]);
aeb->ec = -1;
aeb->scrub = aeb->copy_flag = aeb->sqnum = 0;
list_add_tail(&aeb->u.list, &eba_orphans);
continue;
ubi_err(ubi, "PEB %i is in EBA but not in used list", pnum);
goto fail_bad;
}
aeb->lnum = j;
@ -762,49 +728,13 @@ static int ubi_attach_fastmap(struct ubi_device *ubi,
dbg_bld("inserting PEB:%i (LEB %i) to vol %i",
aeb->pnum, aeb->lnum, av->vol_id);
}
ech = kzalloc(ubi->ec_hdr_alsize, GFP_KERNEL);
if (!ech) {
ret = -ENOMEM;
goto fail;
}
list_for_each_entry_safe(tmp_aeb, _tmp_aeb, &eba_orphans,
u.list) {
int err;
if (ubi_io_is_bad(ubi, tmp_aeb->pnum)) {
ubi_err(ubi, "bad PEB in fastmap EBA orphan list");
ret = UBI_BAD_FASTMAP;
kfree(ech);
goto fail;
}
err = ubi_io_read_ec_hdr(ubi, tmp_aeb->pnum, ech, 0);
if (err && err != UBI_IO_BITFLIPS) {
ubi_err(ubi, "unable to read EC header! PEB:%i err:%i",
tmp_aeb->pnum, err);
ret = err > 0 ? UBI_BAD_FASTMAP : err;
kfree(ech);
goto fail;
} else if (err == UBI_IO_BITFLIPS)
tmp_aeb->scrub = 1;
tmp_aeb->ec = be64_to_cpu(ech->ec);
assign_aeb_to_av(ai, tmp_aeb, av);
}
kfree(ech);
}
ret = scan_pool(ubi, ai, fmpl1->pebs, pool_size, &max_sqnum,
&eba_orphans, &free);
ret = scan_pool(ubi, ai, fmpl1->pebs, pool_size, &max_sqnum, &free);
if (ret)
goto fail;
ret = scan_pool(ubi, ai, fmpl2->pebs, wl_pool_size, &max_sqnum,
&eba_orphans, &free);
ret = scan_pool(ubi, ai, fmpl2->pebs, wl_pool_size, &max_sqnum, &free);
if (ret)
goto fail;
@ -817,7 +747,6 @@ static int ubi_attach_fastmap(struct ubi_device *ubi,
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(&eba_orphans));
ubi_assert(list_empty(&free));
/*
@ -839,10 +768,6 @@ static int ubi_attach_fastmap(struct ubi_device *ubi,
list_del(&tmp_aeb->u.list);
kmem_cache_free(ai->aeb_slab_cache, tmp_aeb);
}
list_for_each_entry_safe(tmp_aeb, _tmp_aeb, &eba_orphans, u.list) {
list_del(&tmp_aeb->u.list);
kmem_cache_free(ai->aeb_slab_cache, tmp_aeb);
}
list_for_each_entry_safe(tmp_aeb, _tmp_aeb, &free, u.list) {
list_del(&tmp_aeb->u.list);
kmem_cache_free(ai->aeb_slab_cache, tmp_aeb);