| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Copyright (C) 2013 Facebook. All rights reserved. |
| */ |
| |
| #include <linux/types.h> |
| #include "btrfs-tests.h" |
| #include "../ctree.h" |
| #include "../transaction.h" |
| #include "../disk-io.h" |
| #include "../qgroup.h" |
| #include "../backref.h" |
| |
| static int insert_normal_tree_ref(struct btrfs_root *root, u64 bytenr, |
| u64 num_bytes, u64 parent, u64 root_objectid) |
| { |
| struct btrfs_trans_handle trans; |
| struct btrfs_extent_item *item; |
| struct btrfs_extent_inline_ref *iref; |
| struct btrfs_tree_block_info *block_info; |
| struct btrfs_path *path; |
| struct extent_buffer *leaf; |
| struct btrfs_key ins; |
| u32 size = sizeof(*item) + sizeof(*iref) + sizeof(*block_info); |
| int ret; |
| |
| btrfs_init_dummy_trans(&trans, NULL); |
| |
| ins.objectid = bytenr; |
| ins.type = BTRFS_EXTENT_ITEM_KEY; |
| ins.offset = num_bytes; |
| |
| path = btrfs_alloc_path(); |
| if (!path) { |
| test_std_err(TEST_ALLOC_ROOT); |
| return -ENOMEM; |
| } |
| |
| ret = btrfs_insert_empty_item(&trans, root, path, &ins, size); |
| if (ret) { |
| test_err("couldn't insert ref %d", ret); |
| btrfs_free_path(path); |
| return ret; |
| } |
| |
| leaf = path->nodes[0]; |
| item = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_extent_item); |
| btrfs_set_extent_refs(leaf, item, 1); |
| btrfs_set_extent_generation(leaf, item, 1); |
| btrfs_set_extent_flags(leaf, item, BTRFS_EXTENT_FLAG_TREE_BLOCK); |
| block_info = (struct btrfs_tree_block_info *)(item + 1); |
| btrfs_set_tree_block_level(leaf, block_info, 0); |
| iref = (struct btrfs_extent_inline_ref *)(block_info + 1); |
| if (parent > 0) { |
| btrfs_set_extent_inline_ref_type(leaf, iref, |
| BTRFS_SHARED_BLOCK_REF_KEY); |
| btrfs_set_extent_inline_ref_offset(leaf, iref, parent); |
| } else { |
| btrfs_set_extent_inline_ref_type(leaf, iref, BTRFS_TREE_BLOCK_REF_KEY); |
| btrfs_set_extent_inline_ref_offset(leaf, iref, root_objectid); |
| } |
| btrfs_free_path(path); |
| return 0; |
| } |
| |
| static int add_tree_ref(struct btrfs_root *root, u64 bytenr, u64 num_bytes, |
| u64 parent, u64 root_objectid) |
| { |
| struct btrfs_trans_handle trans; |
| struct btrfs_extent_item *item; |
| struct btrfs_path *path; |
| struct btrfs_key key; |
| u64 refs; |
| int ret; |
| |
| btrfs_init_dummy_trans(&trans, NULL); |
| |
| key.objectid = bytenr; |
| key.type = BTRFS_EXTENT_ITEM_KEY; |
| key.offset = num_bytes; |
| |
| path = btrfs_alloc_path(); |
| if (!path) { |
| test_std_err(TEST_ALLOC_ROOT); |
| return -ENOMEM; |
| } |
| |
| ret = btrfs_search_slot(&trans, root, &key, path, 0, 1); |
| if (ret) { |
| test_err("couldn't find extent ref"); |
| btrfs_free_path(path); |
| return ret; |
| } |
| |
| item = btrfs_item_ptr(path->nodes[0], path->slots[0], |
| struct btrfs_extent_item); |
| refs = btrfs_extent_refs(path->nodes[0], item); |
| btrfs_set_extent_refs(path->nodes[0], item, refs + 1); |
| btrfs_release_path(path); |
| |
| key.objectid = bytenr; |
| if (parent) { |
| key.type = BTRFS_SHARED_BLOCK_REF_KEY; |
| key.offset = parent; |
| } else { |
| key.type = BTRFS_TREE_BLOCK_REF_KEY; |
| key.offset = root_objectid; |
| } |
| |
| ret = btrfs_insert_empty_item(&trans, root, path, &key, 0); |
| if (ret) |
| test_err("failed to insert backref"); |
| btrfs_free_path(path); |
| return ret; |
| } |
| |
| static int remove_extent_item(struct btrfs_root *root, u64 bytenr, |
| u64 num_bytes) |
| { |
| struct btrfs_trans_handle trans; |
| struct btrfs_key key; |
| struct btrfs_path *path; |
| int ret; |
| |
| btrfs_init_dummy_trans(&trans, NULL); |
| |
| key.objectid = bytenr; |
| key.type = BTRFS_EXTENT_ITEM_KEY; |
| key.offset = num_bytes; |
| |
| path = btrfs_alloc_path(); |
| if (!path) { |
| test_std_err(TEST_ALLOC_ROOT); |
| return -ENOMEM; |
| } |
| |
| ret = btrfs_search_slot(&trans, root, &key, path, -1, 1); |
| if (ret) { |
| test_err("didn't find our key %d", ret); |
| btrfs_free_path(path); |
| return ret; |
| } |
| btrfs_del_item(&trans, root, path); |
| btrfs_free_path(path); |
| return 0; |
| } |
| |
| static int remove_extent_ref(struct btrfs_root *root, u64 bytenr, |
| u64 num_bytes, u64 parent, u64 root_objectid) |
| { |
| struct btrfs_trans_handle trans; |
| struct btrfs_extent_item *item; |
| struct btrfs_path *path; |
| struct btrfs_key key; |
| u64 refs; |
| int ret; |
| |
| btrfs_init_dummy_trans(&trans, NULL); |
| |
| key.objectid = bytenr; |
| key.type = BTRFS_EXTENT_ITEM_KEY; |
| key.offset = num_bytes; |
| |
| path = btrfs_alloc_path(); |
| if (!path) { |
| test_std_err(TEST_ALLOC_ROOT); |
| return -ENOMEM; |
| } |
| |
| ret = btrfs_search_slot(&trans, root, &key, path, 0, 1); |
| if (ret) { |
| test_err("couldn't find extent ref"); |
| btrfs_free_path(path); |
| return ret; |
| } |
| |
| item = btrfs_item_ptr(path->nodes[0], path->slots[0], |
| struct btrfs_extent_item); |
| refs = btrfs_extent_refs(path->nodes[0], item); |
| btrfs_set_extent_refs(path->nodes[0], item, refs - 1); |
| btrfs_release_path(path); |
| |
| key.objectid = bytenr; |
| if (parent) { |
| key.type = BTRFS_SHARED_BLOCK_REF_KEY; |
| key.offset = parent; |
| } else { |
| key.type = BTRFS_TREE_BLOCK_REF_KEY; |
| key.offset = root_objectid; |
| } |
| |
| ret = btrfs_search_slot(&trans, root, &key, path, -1, 1); |
| if (ret) { |
| test_err("couldn't find backref %d", ret); |
| btrfs_free_path(path); |
| return ret; |
| } |
| btrfs_del_item(&trans, root, path); |
| btrfs_free_path(path); |
| return ret; |
| } |
| |
| static int test_no_shared_qgroup(struct btrfs_root *root, |
| u32 sectorsize, u32 nodesize) |
| { |
| struct btrfs_trans_handle trans; |
| struct btrfs_fs_info *fs_info = root->fs_info; |
| struct ulist *old_roots = NULL; |
| struct ulist *new_roots = NULL; |
| int ret; |
| |
| btrfs_init_dummy_trans(&trans, fs_info); |
| |
| test_msg("running qgroup add/remove tests"); |
| ret = btrfs_create_qgroup(&trans, BTRFS_FS_TREE_OBJECTID); |
| if (ret) { |
| test_err("couldn't create a qgroup %d", ret); |
| return ret; |
| } |
| |
| /* |
| * Since the test trans doesn't have the complicated delayed refs, |
| * we can only call btrfs_qgroup_account_extent() directly to test |
| * quota. |
| */ |
| ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &old_roots, false); |
| if (ret) { |
| test_err("couldn't find old roots: %d", ret); |
| return ret; |
| } |
| |
| ret = insert_normal_tree_ref(root, nodesize, nodesize, 0, |
| BTRFS_FS_TREE_OBJECTID); |
| if (ret) { |
| ulist_free(old_roots); |
| return ret; |
| } |
| |
| ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &new_roots, false); |
| if (ret) { |
| ulist_free(old_roots); |
| test_err("couldn't find old roots: %d", ret); |
| return ret; |
| } |
| |
| ret = btrfs_qgroup_account_extent(&trans, nodesize, nodesize, old_roots, |
| new_roots); |
| if (ret) { |
| test_err("couldn't account space for a qgroup %d", ret); |
| return ret; |
| } |
| |
| /* btrfs_qgroup_account_extent() always frees the ulists passed to it. */ |
| old_roots = NULL; |
| new_roots = NULL; |
| |
| if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FS_TREE_OBJECTID, |
| nodesize, nodesize)) { |
| test_err("qgroup counts didn't match expected values"); |
| return -EINVAL; |
| } |
| |
| ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &old_roots, false); |
| if (ret) { |
| test_err("couldn't find old roots: %d", ret); |
| return ret; |
| } |
| |
| ret = remove_extent_item(root, nodesize, nodesize); |
| if (ret) { |
| ulist_free(old_roots); |
| return -EINVAL; |
| } |
| |
| ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &new_roots, false); |
| if (ret) { |
| ulist_free(old_roots); |
| test_err("couldn't find old roots: %d", ret); |
| return ret; |
| } |
| |
| ret = btrfs_qgroup_account_extent(&trans, nodesize, nodesize, old_roots, |
| new_roots); |
| if (ret) { |
| test_err("couldn't account space for a qgroup %d", ret); |
| return -EINVAL; |
| } |
| |
| if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FS_TREE_OBJECTID, 0, 0)) { |
| test_err("qgroup counts didn't match expected values"); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * Add a ref for two different roots to make sure the shared value comes out |
| * right, also remove one of the roots and make sure the exclusive count is |
| * adjusted properly. |
| */ |
| static int test_multiple_refs(struct btrfs_root *root, |
| u32 sectorsize, u32 nodesize) |
| { |
| struct btrfs_trans_handle trans; |
| struct btrfs_fs_info *fs_info = root->fs_info; |
| struct ulist *old_roots = NULL; |
| struct ulist *new_roots = NULL; |
| int ret; |
| |
| btrfs_init_dummy_trans(&trans, fs_info); |
| |
| test_msg("running qgroup multiple refs test"); |
| |
| /* |
| * We have BTRFS_FS_TREE_OBJECTID created already from the |
| * previous test. |
| */ |
| ret = btrfs_create_qgroup(&trans, BTRFS_FIRST_FREE_OBJECTID); |
| if (ret) { |
| test_err("couldn't create a qgroup %d", ret); |
| return ret; |
| } |
| |
| ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &old_roots, false); |
| if (ret) { |
| test_err("couldn't find old roots: %d", ret); |
| return ret; |
| } |
| |
| ret = insert_normal_tree_ref(root, nodesize, nodesize, 0, |
| BTRFS_FS_TREE_OBJECTID); |
| if (ret) { |
| ulist_free(old_roots); |
| return ret; |
| } |
| |
| ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &new_roots, false); |
| if (ret) { |
| ulist_free(old_roots); |
| test_err("couldn't find old roots: %d", ret); |
| return ret; |
| } |
| |
| ret = btrfs_qgroup_account_extent(&trans, nodesize, nodesize, old_roots, |
| new_roots); |
| if (ret) { |
| test_err("couldn't account space for a qgroup %d", ret); |
| return ret; |
| } |
| |
| if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FS_TREE_OBJECTID, |
| nodesize, nodesize)) { |
| test_err("qgroup counts didn't match expected values"); |
| return -EINVAL; |
| } |
| |
| ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &old_roots, false); |
| if (ret) { |
| test_err("couldn't find old roots: %d", ret); |
| return ret; |
| } |
| |
| ret = add_tree_ref(root, nodesize, nodesize, 0, |
| BTRFS_FIRST_FREE_OBJECTID); |
| if (ret) { |
| ulist_free(old_roots); |
| return ret; |
| } |
| |
| ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &new_roots, false); |
| if (ret) { |
| ulist_free(old_roots); |
| test_err("couldn't find old roots: %d", ret); |
| return ret; |
| } |
| |
| ret = btrfs_qgroup_account_extent(&trans, nodesize, nodesize, old_roots, |
| new_roots); |
| if (ret) { |
| test_err("couldn't account space for a qgroup %d", ret); |
| return ret; |
| } |
| |
| if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FS_TREE_OBJECTID, |
| nodesize, 0)) { |
| test_err("qgroup counts didn't match expected values"); |
| return -EINVAL; |
| } |
| |
| if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FIRST_FREE_OBJECTID, |
| nodesize, 0)) { |
| test_err("qgroup counts didn't match expected values"); |
| return -EINVAL; |
| } |
| |
| ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &old_roots, false); |
| if (ret) { |
| test_err("couldn't find old roots: %d", ret); |
| return ret; |
| } |
| |
| ret = remove_extent_ref(root, nodesize, nodesize, 0, |
| BTRFS_FIRST_FREE_OBJECTID); |
| if (ret) { |
| ulist_free(old_roots); |
| return ret; |
| } |
| |
| ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &new_roots, false); |
| if (ret) { |
| ulist_free(old_roots); |
| test_err("couldn't find old roots: %d", ret); |
| return ret; |
| } |
| |
| ret = btrfs_qgroup_account_extent(&trans, nodesize, nodesize, old_roots, |
| new_roots); |
| if (ret) { |
| test_err("couldn't account space for a qgroup %d", ret); |
| return ret; |
| } |
| |
| if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FIRST_FREE_OBJECTID, |
| 0, 0)) { |
| test_err("qgroup counts didn't match expected values"); |
| return -EINVAL; |
| } |
| |
| if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FS_TREE_OBJECTID, |
| nodesize, nodesize)) { |
| test_err("qgroup counts didn't match expected values"); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| int btrfs_test_qgroups(u32 sectorsize, u32 nodesize) |
| { |
| struct btrfs_fs_info *fs_info = NULL; |
| struct btrfs_root *root; |
| struct btrfs_root *tmp_root; |
| int ret = 0; |
| |
| fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize); |
| if (!fs_info) { |
| test_std_err(TEST_ALLOC_FS_INFO); |
| return -ENOMEM; |
| } |
| |
| root = btrfs_alloc_dummy_root(fs_info); |
| if (IS_ERR(root)) { |
| test_std_err(TEST_ALLOC_ROOT); |
| ret = PTR_ERR(root); |
| goto out; |
| } |
| |
| /* We are using this root as our extent root */ |
| root->root_key.objectid = BTRFS_EXTENT_TREE_OBJECTID; |
| root->root_key.type = BTRFS_ROOT_ITEM_KEY; |
| root->root_key.offset = 0; |
| btrfs_global_root_insert(root); |
| |
| /* |
| * Some of the paths we test assume we have a filled out fs_info, so we |
| * just need to add the root in there so we don't panic. |
| */ |
| root->fs_info->tree_root = root; |
| root->fs_info->quota_root = root; |
| set_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags); |
| |
| /* |
| * Can't use bytenr 0, some things freak out |
| * *cough*backref walking code*cough* |
| */ |
| root->node = alloc_test_extent_buffer(root->fs_info, nodesize); |
| if (IS_ERR(root->node)) { |
| test_err("couldn't allocate dummy buffer"); |
| ret = PTR_ERR(root->node); |
| goto out; |
| } |
| btrfs_set_header_level(root->node, 0); |
| btrfs_set_header_nritems(root->node, 0); |
| root->alloc_bytenr += 2 * nodesize; |
| |
| tmp_root = btrfs_alloc_dummy_root(fs_info); |
| if (IS_ERR(tmp_root)) { |
| test_std_err(TEST_ALLOC_ROOT); |
| ret = PTR_ERR(tmp_root); |
| goto out; |
| } |
| |
| tmp_root->root_key.objectid = BTRFS_FS_TREE_OBJECTID; |
| root->fs_info->fs_root = tmp_root; |
| ret = btrfs_insert_fs_root(root->fs_info, tmp_root); |
| if (ret) { |
| test_err("couldn't insert fs root %d", ret); |
| goto out; |
| } |
| btrfs_put_root(tmp_root); |
| |
| tmp_root = btrfs_alloc_dummy_root(fs_info); |
| if (IS_ERR(tmp_root)) { |
| test_std_err(TEST_ALLOC_ROOT); |
| ret = PTR_ERR(tmp_root); |
| goto out; |
| } |
| |
| tmp_root->root_key.objectid = BTRFS_FIRST_FREE_OBJECTID; |
| ret = btrfs_insert_fs_root(root->fs_info, tmp_root); |
| if (ret) { |
| test_err("couldn't insert fs root %d", ret); |
| goto out; |
| } |
| btrfs_put_root(tmp_root); |
| |
| test_msg("running qgroup tests"); |
| ret = test_no_shared_qgroup(root, sectorsize, nodesize); |
| if (ret) |
| goto out; |
| ret = test_multiple_refs(root, sectorsize, nodesize); |
| out: |
| btrfs_free_dummy_root(root); |
| btrfs_free_dummy_fs_info(fs_info); |
| return ret; |
| } |