2 * Copyright (C) 2013 Fusion IO. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
20 #include <linux/mount.h>
21 #include <linux/magic.h>
22 #include "btrfs-tests.h"
24 #include "../free-space-cache.h"
25 #include "../free-space-tree.h"
26 #include "../transaction.h"
27 #include "../volumes.h"
28 #include "../disk-io.h"
29 #include "../qgroup.h"
31 static struct vfsmount *test_mnt = NULL;
33 static const struct super_operations btrfs_test_super_ops = {
34 .alloc_inode = btrfs_alloc_inode,
35 .destroy_inode = btrfs_test_destroy_inode,
38 static struct dentry *btrfs_test_mount(struct file_system_type *fs_type,
39 int flags, const char *dev_name,
42 return mount_pseudo(fs_type, "btrfs_test:", &btrfs_test_super_ops,
43 NULL, BTRFS_TEST_MAGIC);
46 static struct file_system_type test_type = {
47 .name = "btrfs_test_fs",
48 .mount = btrfs_test_mount,
49 .kill_sb = kill_anon_super,
52 struct inode *btrfs_new_test_inode(void)
56 inode = new_inode(test_mnt->mnt_sb);
58 inode_init_owner(inode, NULL, S_IFREG);
63 static int btrfs_init_test_fs(void)
67 ret = register_filesystem(&test_type);
69 printk(KERN_ERR "btrfs: cannot register test file system\n");
73 test_mnt = kern_mount(&test_type);
74 if (IS_ERR(test_mnt)) {
75 printk(KERN_ERR "btrfs: cannot mount test file system\n");
76 unregister_filesystem(&test_type);
77 return PTR_ERR(test_mnt);
82 static void btrfs_destroy_test_fs(void)
84 kern_unmount(test_mnt);
85 unregister_filesystem(&test_type);
88 struct btrfs_fs_info *btrfs_alloc_dummy_fs_info(void)
90 struct btrfs_fs_info *fs_info = kzalloc(sizeof(struct btrfs_fs_info),
95 fs_info->fs_devices = kzalloc(sizeof(struct btrfs_fs_devices),
97 if (!fs_info->fs_devices) {
101 fs_info->super_copy = kzalloc(sizeof(struct btrfs_super_block),
103 if (!fs_info->super_copy) {
104 kfree(fs_info->fs_devices);
109 if (init_srcu_struct(&fs_info->subvol_srcu)) {
110 kfree(fs_info->fs_devices);
111 kfree(fs_info->super_copy);
116 spin_lock_init(&fs_info->buffer_lock);
117 spin_lock_init(&fs_info->qgroup_lock);
118 spin_lock_init(&fs_info->qgroup_op_lock);
119 spin_lock_init(&fs_info->super_lock);
120 spin_lock_init(&fs_info->fs_roots_radix_lock);
121 mutex_init(&fs_info->qgroup_ioctl_lock);
122 mutex_init(&fs_info->qgroup_rescan_lock);
123 rwlock_init(&fs_info->tree_mod_log_lock);
124 fs_info->running_transaction = NULL;
125 fs_info->qgroup_tree = RB_ROOT;
126 fs_info->qgroup_ulist = NULL;
127 atomic64_set(&fs_info->tree_mod_seq, 0);
128 INIT_LIST_HEAD(&fs_info->dirty_qgroups);
129 INIT_LIST_HEAD(&fs_info->dead_roots);
130 INIT_LIST_HEAD(&fs_info->tree_mod_seq_list);
131 INIT_RADIX_TREE(&fs_info->buffer_radix, GFP_ATOMIC);
132 INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC);
133 extent_io_tree_init(&fs_info->freed_extents[0], NULL);
134 extent_io_tree_init(&fs_info->freed_extents[1], NULL);
135 fs_info->pinned_extents = &fs_info->freed_extents[0];
136 set_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
138 test_mnt->mnt_sb->s_fs_info = fs_info;
143 void btrfs_free_dummy_fs_info(struct btrfs_fs_info *fs_info)
145 struct radix_tree_iter iter;
151 if (WARN_ON(!test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO,
152 &fs_info->fs_state)))
155 test_mnt->mnt_sb->s_fs_info = NULL;
157 spin_lock(&fs_info->buffer_lock);
158 radix_tree_for_each_slot(slot, &fs_info->buffer_radix, &iter, 0) {
159 struct extent_buffer *eb;
161 eb = radix_tree_deref_slot_protected(slot, &fs_info->buffer_lock);
164 /* Shouldn't happen but that kind of thinking creates CVE's */
165 if (radix_tree_exception(eb)) {
166 if (radix_tree_deref_retry(eb))
167 slot = radix_tree_iter_retry(&iter);
170 spin_unlock(&fs_info->buffer_lock);
171 free_extent_buffer_stale(eb);
172 spin_lock(&fs_info->buffer_lock);
174 spin_unlock(&fs_info->buffer_lock);
176 btrfs_free_qgroup_config(fs_info);
177 btrfs_free_fs_roots(fs_info);
178 cleanup_srcu_struct(&fs_info->subvol_srcu);
179 kfree(fs_info->super_copy);
180 kfree(fs_info->fs_devices);
184 void btrfs_free_dummy_root(struct btrfs_root *root)
188 /* Will be freed by btrfs_free_fs_roots */
189 if (WARN_ON(test_bit(BTRFS_ROOT_IN_RADIX, &root->state)))
192 free_extent_buffer(root->node);
196 struct btrfs_block_group_cache *
197 btrfs_alloc_dummy_block_group(unsigned long length, u32 sectorsize)
199 struct btrfs_block_group_cache *cache;
201 cache = kzalloc(sizeof(*cache), GFP_KERNEL);
204 cache->free_space_ctl = kzalloc(sizeof(*cache->free_space_ctl),
206 if (!cache->free_space_ctl) {
211 cache->key.objectid = 0;
212 cache->key.offset = length;
213 cache->key.type = BTRFS_BLOCK_GROUP_ITEM_KEY;
214 cache->sectorsize = sectorsize;
215 cache->full_stripe_len = sectorsize;
217 INIT_LIST_HEAD(&cache->list);
218 INIT_LIST_HEAD(&cache->cluster_list);
219 INIT_LIST_HEAD(&cache->bg_list);
220 btrfs_init_free_space_ctl(cache);
221 mutex_init(&cache->free_space_lock);
226 void btrfs_free_dummy_block_group(struct btrfs_block_group_cache *cache)
230 __btrfs_remove_free_space_cache(cache->free_space_ctl);
231 kfree(cache->free_space_ctl);
235 void btrfs_init_dummy_trans(struct btrfs_trans_handle *trans)
237 memset(trans, 0, sizeof(*trans));
239 INIT_LIST_HEAD(&trans->qgroup_ref_list);
240 trans->type = __TRANS_DUMMY;
243 int btrfs_run_sanity_tests(void)
246 u32 sectorsize, nodesize;
247 u32 test_sectorsize[] = {
250 ret = btrfs_init_test_fs();
253 for (i = 0; i < ARRAY_SIZE(test_sectorsize); i++) {
254 sectorsize = test_sectorsize[i];
255 for (nodesize = sectorsize;
256 nodesize <= BTRFS_MAX_METADATA_BLOCKSIZE;
258 pr_info("BTRFS: selftest: sectorsize: %u nodesize: %u\n",
259 sectorsize, nodesize);
260 ret = btrfs_test_free_space_cache(sectorsize, nodesize);
263 ret = btrfs_test_extent_buffer_operations(sectorsize,
267 ret = btrfs_test_extent_io(sectorsize, nodesize);
270 ret = btrfs_test_inodes(sectorsize, nodesize);
273 ret = btrfs_test_qgroups(sectorsize, nodesize);
276 ret = btrfs_test_free_space_tree(sectorsize, nodesize);
282 btrfs_destroy_test_fs();