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ubi: Rework Fastmap attach base code

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Introduce a new list to the UBI attach information
object to be able to deal better with old and corrupted
Fastmap eraseblocks.
Also move more Fastmap specific code into fastmap.c.

Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Richard Weinberger
2016-06-14 10:12:15 +02:00
parent be8011053f
commit fdf10ed710
4 changed files with 165 additions and 45 deletions
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47
drivers/mtd/ubi/wl.c
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@@ -1598,19 +1598,44 @@ int ubi_wl_init(struct ubi_device *ubi, struct ubi_attach_info *ai)
}
}
list_for_each_entry(aeb, &ai->fastmap, u.list) {
cond_resched();
e = ubi_find_fm_block(ubi, aeb->pnum);
if (e) {
ubi_assert(!ubi->lookuptbl[e->pnum]);
ubi->lookuptbl[e->pnum] = e;
} else {
/*
* Usually old Fastmap PEBs are scheduled for erasure
* and we don't have to care about them but if we face
* an power cut before scheduling them we need to
* take care of them here.
*/
if (ubi->lookuptbl[aeb->pnum])
continue;
e = kmem_cache_alloc(ubi_wl_entry_slab, GFP_KERNEL);
if (!e)
goto out_free;
e->pnum = aeb->pnum;
e->ec = aeb->ec;
ubi_assert(!ubi->lookuptbl[e->pnum]);
ubi->lookuptbl[e->pnum] = e;
if (schedule_erase(ubi, e, aeb->vol_id, aeb->lnum, 0)) {
wl_entry_destroy(ubi, e);
goto out_free;
}
}
found_pebs++;
}
dbg_wl("found %i PEBs", found_pebs);
if (ubi->fm) {
ubi_assert(ubi->good_peb_count ==
found_pebs + ubi->fm->used_blocks);
for (i = 0; i < ubi->fm->used_blocks; i++) {
e = ubi->fm->e[i];
ubi->lookuptbl[e->pnum] = e;
}
}
else
ubi_assert(ubi->good_peb_count == found_pebs);
ubi_assert(ubi->good_peb_count == found_pebs);
reserved_pebs = WL_RESERVED_PEBS;
ubi_fastmap_init(ubi, &reserved_pebs);