Btrfs: add sanity tests for new qgroup accounting code
This exercises the various parts of the new qgroup accounting code. We do some
basic stuff and do some things with the shared refs to make sure all that code
works. I had to add a bunch of infrastructure because I needed to be able to
insert items into a fake tree without having to do all the hard work myself,
hopefully this will be usefull in the future. Thanks,
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 77f92a3..0c0fa78 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1110,6 +1110,11 @@
struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root,
u64 bytenr, u32 blocksize)
{
+#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
+ if (unlikely(test_bit(BTRFS_ROOT_DUMMY_ROOT, &root->state)))
+ return alloc_test_extent_buffer(root->fs_info, bytenr,
+ blocksize);
+#endif
return alloc_extent_buffer(root->fs_info, bytenr, blocksize);
}
@@ -1288,6 +1293,7 @@
return ERR_PTR(-ENOMEM);
__setup_root(4096, 4096, 4096, 4096, root, NULL, 1);
set_bit(BTRFS_ROOT_DUMMY_ROOT, &root->state);
+ root->alloc_bytenr = 0;
return root;
}
@@ -2089,7 +2095,7 @@
free_root_extent_buffers(info->chunk_root);
}
-static void del_fs_roots(struct btrfs_fs_info *fs_info)
+void btrfs_free_fs_roots(struct btrfs_fs_info *fs_info)
{
int ret;
struct btrfs_root *gang[8];
@@ -2969,7 +2975,7 @@
fail_trans_kthread:
kthread_stop(fs_info->transaction_kthread);
btrfs_cleanup_transaction(fs_info->tree_root);
- del_fs_roots(fs_info);
+ btrfs_free_fs_roots(fs_info);
fail_cleaner:
kthread_stop(fs_info->cleaner_kthread);
@@ -3504,8 +3510,10 @@
if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state))
btrfs_free_log(NULL, root);
- __btrfs_remove_free_space_cache(root->free_ino_pinned);
- __btrfs_remove_free_space_cache(root->free_ino_ctl);
+ if (root->free_ino_pinned)
+ __btrfs_remove_free_space_cache(root->free_ino_pinned);
+ if (root->free_ino_ctl)
+ __btrfs_remove_free_space_cache(root->free_ino_ctl);
free_fs_root(root);
}
@@ -3655,7 +3663,7 @@
btrfs_sysfs_remove_one(fs_info);
- del_fs_roots(fs_info);
+ btrfs_free_fs_roots(fs_info);
btrfs_put_block_group_cache(fs_info);