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linux-pinenote/fs/btrfs/tests/qgroup-tests.c
Qu Wenruo 442244c963 btrfs: qgroup: Switch self test to extent-oriented qgroup mechanism. 
Since the self test transaction don't have delayed_ref_roots, so use
find_all_roots() and export btrfs_qgroup_account_extent() to simulate it

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
2015-06-10 09:26:05 -07:00

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/*
* Copyright (C) 2013 Facebook. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License v2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 021110-1307, USA.
*/
#include "btrfs-tests.h"
#include "../ctree.h"
#include "../transaction.h"
#include "../disk-io.h"
#include "../qgroup.h"
#include "../backref.h"
static void init_dummy_trans(struct btrfs_trans_handle *trans)
{
memset(trans, 0, sizeof(*trans));
trans->transid = 1;
INIT_LIST_HEAD(&trans->qgroup_ref_list);
trans->type = __TRANS_DUMMY;
}
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;
init_dummy_trans(&trans);
ins.objectid = bytenr;
ins.type = BTRFS_EXTENT_ITEM_KEY;
ins.offset = num_bytes;
path = btrfs_alloc_path();
if (!path) {
test_msg("Couldn't allocate path\n");
return -ENOMEM;
}
path->leave_spinning = 1;
ret = btrfs_insert_empty_item(&trans, root, path, &ins, size);
if (ret) {
test_msg("Couldn't insert ref %d\n", 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, 1);
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;
init_dummy_trans(&trans);
key.objectid = bytenr;
key.type = BTRFS_EXTENT_ITEM_KEY;
key.offset = num_bytes;
path = btrfs_alloc_path();
if (!path) {
test_msg("Couldn't allocate path\n");
return -ENOMEM;
}
path->leave_spinning = 1;
ret = btrfs_search_slot(&trans, root, &key, path, 0, 1);
if (ret) {
test_msg("Couldn't find extent ref\n");
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_msg("Failed to insert backref\n");
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;
init_dummy_trans(&trans);
key.objectid = bytenr;
key.type = BTRFS_EXTENT_ITEM_KEY;
key.offset = num_bytes;
path = btrfs_alloc_path();
if (!path) {
test_msg("Couldn't allocate path\n");
return -ENOMEM;
}
path->leave_spinning = 1;
ret = btrfs_search_slot(&trans, root, &key, path, -1, 1);
if (ret) {
test_msg("Didn't find our key %d\n", 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;
init_dummy_trans(&trans);
key.objectid = bytenr;
key.type = BTRFS_EXTENT_ITEM_KEY;
key.offset = num_bytes;
path = btrfs_alloc_path();
if (!path) {
test_msg("Couldn't allocate path\n");
return -ENOMEM;
}
path->leave_spinning = 1;
ret = btrfs_search_slot(&trans, root, &key, path, 0, 1);
if (ret) {
test_msg("Couldn't find extent ref\n");
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_msg("Couldn't find backref %d\n", 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)
{
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;
init_dummy_trans(&trans);
test_msg("Qgroup basic add\n");
ret = btrfs_create_qgroup(NULL, fs_info, 5);
if (ret) {
test_msg("Couldn't create a qgroup %d\n", ret);
return ret;
}
/*
* Since the test trans doesn't havee the complicated delayed refs,
* we can only call btrfs_qgroup_account_extent() directly to test
* quota.
*/
ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &old_roots);
if (ret) {
ulist_free(old_roots);
test_msg("Couldn't find old roots: %d\n", ret);
return ret;
}
ret = insert_normal_tree_ref(root, 4096, 4096, 0, 5);
if (ret)
return ret;
ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &new_roots);
if (ret) {
ulist_free(old_roots);
ulist_free(new_roots);
test_msg("Couldn't find old roots: %d\n", ret);
return ret;
}
ret = btrfs_qgroup_account_extent(&trans, fs_info, 4096, 4096,
old_roots, new_roots);
if (ret) {
test_msg("Couldn't account space for a qgroup %d\n", ret);
return ret;
}
if (btrfs_verify_qgroup_counts(fs_info, 5, 4096, 4096)) {
test_msg("Qgroup counts didn't match expected values\n");
return -EINVAL;
}
old_roots = NULL;
new_roots = NULL;
ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &old_roots);
if (ret) {
ulist_free(old_roots);
test_msg("Couldn't find old roots: %d\n", ret);
return ret;
}
ret = remove_extent_item(root, 4096, 4096);
if (ret)
return -EINVAL;
ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &new_roots);
if (ret) {
ulist_free(old_roots);
ulist_free(new_roots);
test_msg("Couldn't find old roots: %d\n", ret);
return ret;
}
ret = btrfs_qgroup_account_extent(&trans, fs_info, 4096, 4096,
old_roots, new_roots);
if (ret) {
test_msg("Couldn't account space for a qgroup %d\n", ret);
return -EINVAL;
}
if (btrfs_verify_qgroup_counts(fs_info, 5, 0, 0)) {
test_msg("Qgroup counts didn't match expected values\n");
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)
{
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;
init_dummy_trans(&trans);
test_msg("Qgroup multiple refs test\n");
/* We have 5 created already from the previous test */
ret = btrfs_create_qgroup(NULL, fs_info, 256);
if (ret) {
test_msg("Couldn't create a qgroup %d\n", ret);
return ret;
}
ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &old_roots);
if (ret) {
ulist_free(old_roots);
test_msg("Couldn't find old roots: %d\n", ret);
return ret;
}
ret = insert_normal_tree_ref(root, 4096, 4096, 0, 5);
if (ret)
return ret;
ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &new_roots);
if (ret) {
ulist_free(old_roots);
ulist_free(new_roots);
test_msg("Couldn't find old roots: %d\n", ret);
return ret;
}
ret = btrfs_qgroup_account_extent(&trans, fs_info, 4096, 4096,
old_roots, new_roots);
if (ret) {
test_msg("Couldn't account space for a qgroup %d\n", ret);
return ret;
}
if (btrfs_verify_qgroup_counts(fs_info, 5, 4096, 4096)) {
test_msg("Qgroup counts didn't match expected values\n");
return -EINVAL;
}
ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &old_roots);
if (ret) {
ulist_free(old_roots);
test_msg("Couldn't find old roots: %d\n", ret);
return ret;
}
ret = add_tree_ref(root, 4096, 4096, 0, 256);
if (ret)
return ret;
ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &new_roots);
if (ret) {
ulist_free(old_roots);
ulist_free(new_roots);
test_msg("Couldn't find old roots: %d\n", ret);
return ret;
}
ret = btrfs_qgroup_account_extent(&trans, fs_info, 4096, 4096,
old_roots, new_roots);
if (ret) {
test_msg("Couldn't account space for a qgroup %d\n", ret);
return ret;
}
if (btrfs_verify_qgroup_counts(fs_info, 5, 4096, 0)) {
test_msg("Qgroup counts didn't match expected values\n");
return -EINVAL;
}
if (btrfs_verify_qgroup_counts(fs_info, 256, 4096, 0)) {
test_msg("Qgroup counts didn't match expected values\n");
return -EINVAL;
}
ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &old_roots);
if (ret) {
ulist_free(old_roots);
test_msg("Couldn't find old roots: %d\n", ret);
return ret;
}
ret = remove_extent_ref(root, 4096, 4096, 0, 256);
if (ret)
return ret;
ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &new_roots);
if (ret) {
ulist_free(old_roots);
ulist_free(new_roots);
test_msg("Couldn't find old roots: %d\n", ret);
return ret;
}
ret = btrfs_qgroup_account_extent(&trans, fs_info, 4096, 4096,
old_roots, new_roots);
if (ret) {
test_msg("Couldn't account space for a qgroup %d\n", ret);
return ret;
}
if (btrfs_verify_qgroup_counts(fs_info, 256, 0, 0)) {
test_msg("Qgroup counts didn't match expected values\n");
return -EINVAL;
}
if (btrfs_verify_qgroup_counts(fs_info, 5, 4096, 4096)) {
test_msg("Qgroup counts didn't match expected values\n");
return -EINVAL;
}
return 0;
}
int btrfs_test_qgroups(void)
{
struct btrfs_root *root;
struct btrfs_root *tmp_root;
int ret = 0;
root = btrfs_alloc_dummy_root();
if (IS_ERR(root)) {
test_msg("Couldn't allocate root\n");
return PTR_ERR(root);
}
root->fs_info = btrfs_alloc_dummy_fs_info();
if (!root->fs_info) {
test_msg("Couldn't allocate dummy fs info\n");
ret = -ENOMEM;
goto out;
}
/* We are using this root as our extent root */
root->fs_info->extent_root = 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;
root->fs_info->quota_enabled = 1;
/*
* Can't use bytenr 0, some things freak out
* *cough*backref walking code*cough*
*/
root->node = alloc_test_extent_buffer(root->fs_info, 4096);
if (!root->node) {
test_msg("Couldn't allocate dummy buffer\n");
ret = -ENOMEM;
goto out;
}
btrfs_set_header_level(root->node, 0);
btrfs_set_header_nritems(root->node, 0);
root->alloc_bytenr += 8192;
tmp_root = btrfs_alloc_dummy_root();
if (IS_ERR(tmp_root)) {
test_msg("Couldn't allocate a fs root\n");
ret = PTR_ERR(tmp_root);
goto out;
}
tmp_root->root_key.objectid = 5;
root->fs_info->fs_root = tmp_root;
ret = btrfs_insert_fs_root(root->fs_info, tmp_root);
if (ret) {
test_msg("Couldn't insert fs root %d\n", ret);
goto out;
}
tmp_root = btrfs_alloc_dummy_root();
if (IS_ERR(tmp_root)) {
test_msg("Couldn't allocate a fs root\n");
ret = PTR_ERR(tmp_root);
goto out;
}
tmp_root->root_key.objectid = 256;
ret = btrfs_insert_fs_root(root->fs_info, tmp_root);
if (ret) {
test_msg("Couldn't insert fs root %d\n", ret);
goto out;
}
test_msg("Running qgroup tests\n");
ret = test_no_shared_qgroup(root);
if (ret)
goto out;
ret = test_multiple_refs(root);
out:
btrfs_free_dummy_root(root);
return ret;
}
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