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dm array: fix bug in growing array

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Entries would be lost if the old tail block was partially filled.

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Cc: stable@vger.kernel.org # 3.9+
This commit is contained in:
Joe Thornber 2013-10-30 11:19:59 +00:00 committed by Mike Snitzer
parent b63349a7a5
commit 9c1d4de560
1 changed files with 4 additions and 1 deletions
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5
drivers/md/persistent-data/dm-array.c
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@ -509,15 +509,18 @@ static int grow_add_tail_block(struct resize *resize)
static int grow_needs_more_blocks(struct resize *resize)
{
int r;
unsigned old_nr_blocks = resize->old_nr_full_blocks;
if (resize->old_nr_entries_in_last_block > 0) {
old_nr_blocks++;
r = grow_extend_tail_block(resize, resize->max_entries);
if (r)
return r;
}
r = insert_full_ablocks(resize->info, resize->size_of_block,
resize->old_nr_full_blocks,
old_nr_blocks,
resize->new_nr_full_blocks,
resize->max_entries, resize->value,
&resize->root);