1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (C) 2013 Fusion IO. All rights reserved.
7 #include <linux/mount.h>
8 #include <linux/magic.h>
9 #include "btrfs-tests.h"
11 #include "../free-space-cache.h"
12 #include "../free-space-tree.h"
13 #include "../transaction.h"
14 #include "../volumes.h"
15 #include "../disk-io.h"
16 #include "../qgroup.h"
18 static struct vfsmount *test_mnt = NULL;
20 static const struct super_operations btrfs_test_super_ops = {
21 .alloc_inode = btrfs_alloc_inode,
22 .destroy_inode = btrfs_test_destroy_inode,
25 static struct dentry *btrfs_test_mount(struct file_system_type *fs_type,
26 int flags, const char *dev_name,
29 return mount_pseudo(fs_type, "btrfs_test:", &btrfs_test_super_ops,
30 NULL, BTRFS_TEST_MAGIC);
33 static struct file_system_type test_type = {
34 .name = "btrfs_test_fs",
35 .mount = btrfs_test_mount,
36 .kill_sb = kill_anon_super,
39 struct inode *btrfs_new_test_inode(void)
41 return new_inode(test_mnt->mnt_sb);
44 static int btrfs_init_test_fs(void)
48 ret = register_filesystem(&test_type);
50 printk(KERN_ERR "btrfs: cannot register test file system\n");
54 test_mnt = kern_mount(&test_type);
55 if (IS_ERR(test_mnt)) {
56 printk(KERN_ERR "btrfs: cannot mount test file system\n");
57 unregister_filesystem(&test_type);
58 return PTR_ERR(test_mnt);
63 static void btrfs_destroy_test_fs(void)
65 kern_unmount(test_mnt);
66 unregister_filesystem(&test_type);
69 struct btrfs_fs_info *btrfs_alloc_dummy_fs_info(u32 nodesize, u32 sectorsize)
71 struct btrfs_fs_info *fs_info = kzalloc(sizeof(struct btrfs_fs_info),
76 fs_info->fs_devices = kzalloc(sizeof(struct btrfs_fs_devices),
78 if (!fs_info->fs_devices) {
82 fs_info->super_copy = kzalloc(sizeof(struct btrfs_super_block),
84 if (!fs_info->super_copy) {
85 kfree(fs_info->fs_devices);
90 fs_info->nodesize = nodesize;
91 fs_info->sectorsize = sectorsize;
93 if (init_srcu_struct(&fs_info->subvol_srcu)) {
94 kfree(fs_info->fs_devices);
95 kfree(fs_info->super_copy);
100 spin_lock_init(&fs_info->buffer_lock);
101 spin_lock_init(&fs_info->qgroup_lock);
102 spin_lock_init(&fs_info->qgroup_op_lock);
103 spin_lock_init(&fs_info->super_lock);
104 spin_lock_init(&fs_info->fs_roots_radix_lock);
105 spin_lock_init(&fs_info->tree_mod_seq_lock);
106 mutex_init(&fs_info->qgroup_ioctl_lock);
107 mutex_init(&fs_info->qgroup_rescan_lock);
108 rwlock_init(&fs_info->tree_mod_log_lock);
109 fs_info->running_transaction = NULL;
110 fs_info->qgroup_tree = RB_ROOT;
111 fs_info->qgroup_ulist = NULL;
112 atomic64_set(&fs_info->tree_mod_seq, 0);
113 INIT_LIST_HEAD(&fs_info->dirty_qgroups);
114 INIT_LIST_HEAD(&fs_info->dead_roots);
115 INIT_LIST_HEAD(&fs_info->tree_mod_seq_list);
116 INIT_RADIX_TREE(&fs_info->buffer_radix, GFP_ATOMIC);
117 INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC);
118 extent_io_tree_init(&fs_info->freed_extents[0], NULL);
119 extent_io_tree_init(&fs_info->freed_extents[1], NULL);
120 fs_info->pinned_extents = &fs_info->freed_extents[0];
121 set_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
123 test_mnt->mnt_sb->s_fs_info = fs_info;
128 void btrfs_free_dummy_fs_info(struct btrfs_fs_info *fs_info)
130 struct radix_tree_iter iter;
136 if (WARN_ON(!test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO,
137 &fs_info->fs_state)))
140 test_mnt->mnt_sb->s_fs_info = NULL;
142 spin_lock(&fs_info->buffer_lock);
143 radix_tree_for_each_slot(slot, &fs_info->buffer_radix, &iter, 0) {
144 struct extent_buffer *eb;
146 eb = radix_tree_deref_slot_protected(slot, &fs_info->buffer_lock);
149 /* Shouldn't happen but that kind of thinking creates CVE's */
150 if (radix_tree_exception(eb)) {
151 if (radix_tree_deref_retry(eb))
152 slot = radix_tree_iter_retry(&iter);
155 slot = radix_tree_iter_resume(slot, &iter);
156 spin_unlock(&fs_info->buffer_lock);
157 free_extent_buffer_stale(eb);
158 spin_lock(&fs_info->buffer_lock);
160 spin_unlock(&fs_info->buffer_lock);
162 btrfs_free_qgroup_config(fs_info);
163 btrfs_free_fs_roots(fs_info);
164 cleanup_srcu_struct(&fs_info->subvol_srcu);
165 kfree(fs_info->super_copy);
166 kfree(fs_info->fs_devices);
170 void btrfs_free_dummy_root(struct btrfs_root *root)
174 /* Will be freed by btrfs_free_fs_roots */
175 if (WARN_ON(test_bit(BTRFS_ROOT_IN_RADIX, &root->state)))
178 /* One for allocate_extent_buffer */
179 free_extent_buffer(root->node);
184 struct btrfs_block_group_cache *
185 btrfs_alloc_dummy_block_group(struct btrfs_fs_info *fs_info,
186 unsigned long length)
188 struct btrfs_block_group_cache *cache;
190 cache = kzalloc(sizeof(*cache), GFP_KERNEL);
193 cache->free_space_ctl = kzalloc(sizeof(*cache->free_space_ctl),
195 if (!cache->free_space_ctl) {
200 cache->key.objectid = 0;
201 cache->key.offset = length;
202 cache->key.type = BTRFS_BLOCK_GROUP_ITEM_KEY;
203 cache->full_stripe_len = fs_info->sectorsize;
204 cache->fs_info = fs_info;
206 INIT_LIST_HEAD(&cache->list);
207 INIT_LIST_HEAD(&cache->cluster_list);
208 INIT_LIST_HEAD(&cache->bg_list);
209 btrfs_init_free_space_ctl(cache);
210 mutex_init(&cache->free_space_lock);
215 void btrfs_free_dummy_block_group(struct btrfs_block_group_cache *cache)
219 __btrfs_remove_free_space_cache(cache->free_space_ctl);
220 kfree(cache->free_space_ctl);
224 void btrfs_init_dummy_trans(struct btrfs_trans_handle *trans,
225 struct btrfs_fs_info *fs_info)
227 memset(trans, 0, sizeof(*trans));
229 trans->type = __TRANS_DUMMY;
230 trans->fs_info = fs_info;
233 int btrfs_run_sanity_tests(void)
236 u32 sectorsize, nodesize;
237 u32 test_sectorsize[] = {
240 ret = btrfs_init_test_fs();
243 for (i = 0; i < ARRAY_SIZE(test_sectorsize); i++) {
244 sectorsize = test_sectorsize[i];
245 for (nodesize = sectorsize;
246 nodesize <= BTRFS_MAX_METADATA_BLOCKSIZE;
248 pr_info("BTRFS: selftest: sectorsize: %u nodesize: %u\n",
249 sectorsize, nodesize);
250 ret = btrfs_test_free_space_cache(sectorsize, nodesize);
253 ret = btrfs_test_extent_buffer_operations(sectorsize,
257 ret = btrfs_test_extent_io(sectorsize, nodesize);
260 ret = btrfs_test_inodes(sectorsize, nodesize);
263 ret = btrfs_test_qgroups(sectorsize, nodesize);
266 ret = btrfs_test_free_space_tree(sectorsize, nodesize);
271 ret = btrfs_test_extent_map();
274 btrfs_destroy_test_fs();