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authorLinus Torvalds <torvalds@linux-foundation.org>2015-10-24 07:23:52 +0900
committerLinus Torvalds <torvalds@linux-foundation.org>2015-10-24 07:23:52 +0900
commit35df017c4d5571ee6f3061964d1445aae250219c (patch)
tree90023fc44a9660a7e506c1ba7b7f44f8af5a141e
parentea1ee5ff1b500ccdc64782ecef13d276afb08f14 (diff)
parent3201ac452e84a8a368197d648c9b7011e061804a (diff)
Merge tag 'dm-4.3-fixes-4' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
Pull device mapper fixes from Mike Snitzer: "Three stable fixes (two in btree code used by DM thinp and one to properly store flags in DM cache metadata's superblock)" * tag 'dm-4.3-fixes-4' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: dm cache: the CLEAN_SHUTDOWN flag was not being set dm btree: fix leak of bufio-backed block in btree_split_beneath error path dm btree remove: fix a bug when rebalancing nodes after removal
-rw-r--r--drivers/md/dm-cache-metadata.c2
-rw-r--r--drivers/md/persistent-data/dm-btree-remove.c17
-rw-r--r--drivers/md/persistent-data/dm-btree.c2
3 files changed, 13 insertions, 8 deletions
diff --git a/drivers/md/dm-cache-metadata.c b/drivers/md/dm-cache-metadata.c
index 20cc36b01b77..0a17d1b91a81 100644
--- a/drivers/md/dm-cache-metadata.c
+++ b/drivers/md/dm-cache-metadata.c
@@ -634,10 +634,10 @@ static int __commit_transaction(struct dm_cache_metadata *cmd,
disk_super = dm_block_data(sblock);
+ disk_super->flags = cpu_to_le32(cmd->flags);
if (mutator)
update_flags(disk_super, mutator);
- disk_super->flags = cpu_to_le32(cmd->flags);
disk_super->mapping_root = cpu_to_le64(cmd->root);
disk_super->hint_root = cpu_to_le64(cmd->hint_root);
disk_super->discard_root = cpu_to_le64(cmd->discard_root);
diff --git a/drivers/md/persistent-data/dm-btree-remove.c b/drivers/md/persistent-data/dm-btree-remove.c
index 421a36c593e3..2e4c4cb79e4d 100644
--- a/drivers/md/persistent-data/dm-btree-remove.c
+++ b/drivers/md/persistent-data/dm-btree-remove.c
@@ -301,11 +301,16 @@ static void redistribute3(struct dm_btree_info *info, struct btree_node *parent,
{
int s;
uint32_t max_entries = le32_to_cpu(left->header.max_entries);
- unsigned target = (nr_left + nr_center + nr_right) / 3;
- BUG_ON(target > max_entries);
+ unsigned total = nr_left + nr_center + nr_right;
+ unsigned target_right = total / 3;
+ unsigned remainder = (target_right * 3) != total;
+ unsigned target_left = target_right + remainder;
+
+ BUG_ON(target_left > max_entries);
+ BUG_ON(target_right > max_entries);
if (nr_left < nr_right) {
- s = nr_left - target;
+ s = nr_left - target_left;
if (s < 0 && nr_center < -s) {
/* not enough in central node */
@@ -316,10 +321,10 @@ static void redistribute3(struct dm_btree_info *info, struct btree_node *parent,
} else
shift(left, center, s);
- shift(center, right, target - nr_right);
+ shift(center, right, target_right - nr_right);
} else {
- s = target - nr_right;
+ s = target_right - nr_right;
if (s > 0 && nr_center < s) {
/* not enough in central node */
shift(center, right, nr_center);
@@ -329,7 +334,7 @@ static void redistribute3(struct dm_btree_info *info, struct btree_node *parent,
} else
shift(center, right, s);
- shift(left, center, nr_left - target);
+ shift(left, center, nr_left - target_left);
}
*key_ptr(parent, c->index) = center->keys[0];
diff --git a/drivers/md/persistent-data/dm-btree.c b/drivers/md/persistent-data/dm-btree.c
index b6cec258cc21..0e09aef43998 100644
--- a/drivers/md/persistent-data/dm-btree.c
+++ b/drivers/md/persistent-data/dm-btree.c
@@ -523,7 +523,7 @@ static int btree_split_beneath(struct shadow_spine *s, uint64_t key)
r = new_block(s->info, &right);
if (r < 0) {
- /* FIXME: put left */
+ unlock_block(s->info, left);
return r;
}