Btrfs: add ASSERT for block group's memory leak

This adds several ASSERT()' s to report memory leak of block group cache.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index c2b81b0..e962b0e 100644 (file)
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -9942,6 +9942,7 @@ void btrfs_put_block_group_cache(struct btrfs_fs_info *info)
                block_group->iref = 0;
                block_group->inode = NULL;
                spin_unlock(&block_group->lock);
+               ASSERT(block_group->io_ctl.inode == NULL);
                iput(inode);
                last = block_group->key.objectid + block_group->key.offset;
                btrfs_put_block_group(block_group);
@@ -9999,6 +10000,10 @@ int btrfs_free_block_groups(struct btrfs_fs_info *info)
                        free_excluded_extents(info->extent_root, block_group);
 
                btrfs_remove_free_space_cache(block_group);
+               ASSERT(list_empty(&block_group->dirty_list));
+               ASSERT(list_empty(&block_group->io_list));
+               ASSERT(list_empty(&block_group->bg_list));
+               ASSERT(atomic_read(&block_group->count) == 1);
                btrfs_put_block_group(block_group);
 
                spin_lock(&info->block_group_cache_lock);