527 lines
13 KiB
C
527 lines
13 KiB
C
/*
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* Copyright (C) 2013 Facebook. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License v2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#include "btrfs-tests.h"
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#include "../ctree.h"
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#include "../transaction.h"
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#include "../disk-io.h"
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#include "../qgroup.h"
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#include "../backref.h"
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static void init_dummy_trans(struct btrfs_trans_handle *trans)
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{
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memset(trans, 0, sizeof(*trans));
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trans->transid = 1;
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INIT_LIST_HEAD(&trans->qgroup_ref_list);
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trans->type = __TRANS_DUMMY;
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}
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static int insert_normal_tree_ref(struct btrfs_root *root, u64 bytenr,
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u64 num_bytes, u64 parent, u64 root_objectid)
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{
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struct btrfs_trans_handle trans;
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struct btrfs_extent_item *item;
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struct btrfs_extent_inline_ref *iref;
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struct btrfs_tree_block_info *block_info;
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struct btrfs_path *path;
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struct extent_buffer *leaf;
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struct btrfs_key ins;
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u32 size = sizeof(*item) + sizeof(*iref) + sizeof(*block_info);
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int ret;
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init_dummy_trans(&trans);
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ins.objectid = bytenr;
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ins.type = BTRFS_EXTENT_ITEM_KEY;
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ins.offset = num_bytes;
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path = btrfs_alloc_path();
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if (!path) {
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test_msg("Couldn't allocate path\n");
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return -ENOMEM;
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}
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path->leave_spinning = 1;
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ret = btrfs_insert_empty_item(&trans, root, path, &ins, size);
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if (ret) {
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test_msg("Couldn't insert ref %d\n", ret);
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btrfs_free_path(path);
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return ret;
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}
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leaf = path->nodes[0];
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item = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_extent_item);
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btrfs_set_extent_refs(leaf, item, 1);
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btrfs_set_extent_generation(leaf, item, 1);
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btrfs_set_extent_flags(leaf, item, BTRFS_EXTENT_FLAG_TREE_BLOCK);
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block_info = (struct btrfs_tree_block_info *)(item + 1);
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btrfs_set_tree_block_level(leaf, block_info, 1);
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iref = (struct btrfs_extent_inline_ref *)(block_info + 1);
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if (parent > 0) {
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btrfs_set_extent_inline_ref_type(leaf, iref,
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BTRFS_SHARED_BLOCK_REF_KEY);
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btrfs_set_extent_inline_ref_offset(leaf, iref, parent);
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} else {
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btrfs_set_extent_inline_ref_type(leaf, iref, BTRFS_TREE_BLOCK_REF_KEY);
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btrfs_set_extent_inline_ref_offset(leaf, iref, root_objectid);
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}
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btrfs_free_path(path);
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return 0;
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}
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static int add_tree_ref(struct btrfs_root *root, u64 bytenr, u64 num_bytes,
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u64 parent, u64 root_objectid)
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{
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struct btrfs_trans_handle trans;
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struct btrfs_extent_item *item;
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struct btrfs_path *path;
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struct btrfs_key key;
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u64 refs;
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int ret;
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init_dummy_trans(&trans);
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key.objectid = bytenr;
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key.type = BTRFS_EXTENT_ITEM_KEY;
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key.offset = num_bytes;
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path = btrfs_alloc_path();
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if (!path) {
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test_msg("Couldn't allocate path\n");
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return -ENOMEM;
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}
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path->leave_spinning = 1;
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ret = btrfs_search_slot(&trans, root, &key, path, 0, 1);
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if (ret) {
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test_msg("Couldn't find extent ref\n");
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btrfs_free_path(path);
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return ret;
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}
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item = btrfs_item_ptr(path->nodes[0], path->slots[0],
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struct btrfs_extent_item);
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refs = btrfs_extent_refs(path->nodes[0], item);
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btrfs_set_extent_refs(path->nodes[0], item, refs + 1);
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btrfs_release_path(path);
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key.objectid = bytenr;
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if (parent) {
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key.type = BTRFS_SHARED_BLOCK_REF_KEY;
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key.offset = parent;
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} else {
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key.type = BTRFS_TREE_BLOCK_REF_KEY;
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key.offset = root_objectid;
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}
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ret = btrfs_insert_empty_item(&trans, root, path, &key, 0);
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if (ret)
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test_msg("Failed to insert backref\n");
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btrfs_free_path(path);
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return ret;
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}
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static int remove_extent_item(struct btrfs_root *root, u64 bytenr,
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u64 num_bytes)
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{
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struct btrfs_trans_handle trans;
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struct btrfs_key key;
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struct btrfs_path *path;
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int ret;
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init_dummy_trans(&trans);
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key.objectid = bytenr;
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key.type = BTRFS_EXTENT_ITEM_KEY;
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key.offset = num_bytes;
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path = btrfs_alloc_path();
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if (!path) {
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test_msg("Couldn't allocate path\n");
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return -ENOMEM;
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}
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path->leave_spinning = 1;
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ret = btrfs_search_slot(&trans, root, &key, path, -1, 1);
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if (ret) {
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test_msg("Didn't find our key %d\n", ret);
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btrfs_free_path(path);
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return ret;
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}
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btrfs_del_item(&trans, root, path);
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btrfs_free_path(path);
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return 0;
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}
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static int remove_extent_ref(struct btrfs_root *root, u64 bytenr,
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u64 num_bytes, u64 parent, u64 root_objectid)
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{
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struct btrfs_trans_handle trans;
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struct btrfs_extent_item *item;
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struct btrfs_path *path;
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struct btrfs_key key;
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u64 refs;
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int ret;
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init_dummy_trans(&trans);
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key.objectid = bytenr;
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key.type = BTRFS_EXTENT_ITEM_KEY;
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key.offset = num_bytes;
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path = btrfs_alloc_path();
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if (!path) {
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test_msg("Couldn't allocate path\n");
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return -ENOMEM;
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}
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path->leave_spinning = 1;
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ret = btrfs_search_slot(&trans, root, &key, path, 0, 1);
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if (ret) {
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test_msg("Couldn't find extent ref\n");
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btrfs_free_path(path);
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return ret;
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}
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item = btrfs_item_ptr(path->nodes[0], path->slots[0],
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struct btrfs_extent_item);
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refs = btrfs_extent_refs(path->nodes[0], item);
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btrfs_set_extent_refs(path->nodes[0], item, refs - 1);
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btrfs_release_path(path);
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key.objectid = bytenr;
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if (parent) {
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key.type = BTRFS_SHARED_BLOCK_REF_KEY;
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key.offset = parent;
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} else {
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key.type = BTRFS_TREE_BLOCK_REF_KEY;
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key.offset = root_objectid;
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}
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ret = btrfs_search_slot(&trans, root, &key, path, -1, 1);
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if (ret) {
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test_msg("Couldn't find backref %d\n", ret);
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btrfs_free_path(path);
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return ret;
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}
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btrfs_del_item(&trans, root, path);
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btrfs_free_path(path);
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return ret;
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}
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static int test_no_shared_qgroup(struct btrfs_root *root)
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{
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struct btrfs_trans_handle trans;
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struct btrfs_fs_info *fs_info = root->fs_info;
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struct ulist *old_roots = NULL;
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struct ulist *new_roots = NULL;
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int ret;
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init_dummy_trans(&trans);
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test_msg("Qgroup basic add\n");
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ret = btrfs_create_qgroup(NULL, fs_info, 5);
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if (ret) {
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test_msg("Couldn't create a qgroup %d\n", ret);
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return ret;
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}
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/*
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* Since the test trans doesn't havee the complicated delayed refs,
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* we can only call btrfs_qgroup_account_extent() directly to test
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* quota.
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*/
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ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &old_roots);
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if (ret) {
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ulist_free(old_roots);
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test_msg("Couldn't find old roots: %d\n", ret);
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return ret;
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}
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ret = insert_normal_tree_ref(root, 4096, 4096, 0, 5);
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if (ret)
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return ret;
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ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &new_roots);
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if (ret) {
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ulist_free(old_roots);
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ulist_free(new_roots);
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test_msg("Couldn't find old roots: %d\n", ret);
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return ret;
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}
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ret = btrfs_qgroup_account_extent(&trans, fs_info, 4096, 4096,
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old_roots, new_roots);
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if (ret) {
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test_msg("Couldn't account space for a qgroup %d\n", ret);
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return ret;
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}
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if (btrfs_verify_qgroup_counts(fs_info, 5, 4096, 4096)) {
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test_msg("Qgroup counts didn't match expected values\n");
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return -EINVAL;
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}
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old_roots = NULL;
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new_roots = NULL;
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ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &old_roots);
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if (ret) {
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ulist_free(old_roots);
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test_msg("Couldn't find old roots: %d\n", ret);
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return ret;
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}
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ret = remove_extent_item(root, 4096, 4096);
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if (ret)
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return -EINVAL;
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ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &new_roots);
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if (ret) {
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ulist_free(old_roots);
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ulist_free(new_roots);
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test_msg("Couldn't find old roots: %d\n", ret);
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return ret;
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}
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ret = btrfs_qgroup_account_extent(&trans, fs_info, 4096, 4096,
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old_roots, new_roots);
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if (ret) {
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test_msg("Couldn't account space for a qgroup %d\n", ret);
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return -EINVAL;
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}
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if (btrfs_verify_qgroup_counts(fs_info, 5, 0, 0)) {
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test_msg("Qgroup counts didn't match expected values\n");
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return -EINVAL;
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}
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return 0;
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}
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/*
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* Add a ref for two different roots to make sure the shared value comes out
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* right, also remove one of the roots and make sure the exclusive count is
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* adjusted properly.
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*/
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static int test_multiple_refs(struct btrfs_root *root)
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{
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struct btrfs_trans_handle trans;
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struct btrfs_fs_info *fs_info = root->fs_info;
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struct ulist *old_roots = NULL;
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struct ulist *new_roots = NULL;
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int ret;
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init_dummy_trans(&trans);
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test_msg("Qgroup multiple refs test\n");
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/* We have 5 created already from the previous test */
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ret = btrfs_create_qgroup(NULL, fs_info, 256);
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if (ret) {
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test_msg("Couldn't create a qgroup %d\n", ret);
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return ret;
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}
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ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &old_roots);
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if (ret) {
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ulist_free(old_roots);
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test_msg("Couldn't find old roots: %d\n", ret);
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return ret;
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}
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ret = insert_normal_tree_ref(root, 4096, 4096, 0, 5);
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if (ret)
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return ret;
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ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &new_roots);
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if (ret) {
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ulist_free(old_roots);
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ulist_free(new_roots);
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test_msg("Couldn't find old roots: %d\n", ret);
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return ret;
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}
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ret = btrfs_qgroup_account_extent(&trans, fs_info, 4096, 4096,
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old_roots, new_roots);
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if (ret) {
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test_msg("Couldn't account space for a qgroup %d\n", ret);
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return ret;
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}
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if (btrfs_verify_qgroup_counts(fs_info, 5, 4096, 4096)) {
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test_msg("Qgroup counts didn't match expected values\n");
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return -EINVAL;
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}
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ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &old_roots);
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if (ret) {
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ulist_free(old_roots);
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test_msg("Couldn't find old roots: %d\n", ret);
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return ret;
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}
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ret = add_tree_ref(root, 4096, 4096, 0, 256);
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if (ret)
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return ret;
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ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &new_roots);
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if (ret) {
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ulist_free(old_roots);
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ulist_free(new_roots);
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test_msg("Couldn't find old roots: %d\n", ret);
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return ret;
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}
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ret = btrfs_qgroup_account_extent(&trans, fs_info, 4096, 4096,
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old_roots, new_roots);
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if (ret) {
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test_msg("Couldn't account space for a qgroup %d\n", ret);
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return ret;
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}
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if (btrfs_verify_qgroup_counts(fs_info, 5, 4096, 0)) {
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test_msg("Qgroup counts didn't match expected values\n");
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return -EINVAL;
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}
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if (btrfs_verify_qgroup_counts(fs_info, 256, 4096, 0)) {
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test_msg("Qgroup counts didn't match expected values\n");
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return -EINVAL;
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}
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ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &old_roots);
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if (ret) {
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ulist_free(old_roots);
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test_msg("Couldn't find old roots: %d\n", ret);
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return ret;
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}
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ret = remove_extent_ref(root, 4096, 4096, 0, 256);
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if (ret)
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return ret;
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ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &new_roots);
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if (ret) {
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ulist_free(old_roots);
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ulist_free(new_roots);
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test_msg("Couldn't find old roots: %d\n", ret);
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return ret;
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}
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ret = btrfs_qgroup_account_extent(&trans, fs_info, 4096, 4096,
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old_roots, new_roots);
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if (ret) {
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test_msg("Couldn't account space for a qgroup %d\n", ret);
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return ret;
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}
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if (btrfs_verify_qgroup_counts(fs_info, 256, 0, 0)) {
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test_msg("Qgroup counts didn't match expected values\n");
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return -EINVAL;
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}
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if (btrfs_verify_qgroup_counts(fs_info, 5, 4096, 4096)) {
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test_msg("Qgroup counts didn't match expected values\n");
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return -EINVAL;
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}
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return 0;
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}
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int btrfs_test_qgroups(void)
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{
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struct btrfs_root *root;
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struct btrfs_root *tmp_root;
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int ret = 0;
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root = btrfs_alloc_dummy_root();
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if (IS_ERR(root)) {
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test_msg("Couldn't allocate root\n");
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return PTR_ERR(root);
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}
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root->fs_info = btrfs_alloc_dummy_fs_info();
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if (!root->fs_info) {
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test_msg("Couldn't allocate dummy fs info\n");
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ret = -ENOMEM;
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goto out;
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}
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/* We are using this root as our extent root */
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root->fs_info->extent_root = root;
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/*
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* Some of the paths we test assume we have a filled out fs_info, so we
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* just need to add the root in there so we don't panic.
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*/
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root->fs_info->tree_root = root;
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root->fs_info->quota_root = root;
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root->fs_info->quota_enabled = 1;
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/*
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* Can't use bytenr 0, some things freak out
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* *cough*backref walking code*cough*
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*/
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root->node = alloc_test_extent_buffer(root->fs_info, 4096);
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if (!root->node) {
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test_msg("Couldn't allocate dummy buffer\n");
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ret = -ENOMEM;
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goto out;
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}
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btrfs_set_header_level(root->node, 0);
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btrfs_set_header_nritems(root->node, 0);
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root->alloc_bytenr += 8192;
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tmp_root = btrfs_alloc_dummy_root();
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if (IS_ERR(tmp_root)) {
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test_msg("Couldn't allocate a fs root\n");
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ret = PTR_ERR(tmp_root);
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goto out;
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}
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tmp_root->root_key.objectid = 5;
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root->fs_info->fs_root = tmp_root;
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ret = btrfs_insert_fs_root(root->fs_info, tmp_root);
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if (ret) {
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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;
|
|
}
|