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 const char *test_error[] = {
21 [TEST_ALLOC_FS_INFO] = "cannot allocate fs_info",
22 [TEST_ALLOC_ROOT] = "cannot allocate root",
23 [TEST_ALLOC_EXTENT_BUFFER] = "cannot extent buffer",
24 [TEST_ALLOC_PATH] = "cannot allocate path",
25 [TEST_ALLOC_INODE] = "cannot allocate inode",
26 [TEST_ALLOC_BLOCK_GROUP] = "cannot allocate block group",
27 [TEST_ALLOC_EXTENT_MAP] = "cannot allocate extent map",
30 static const struct super_operations btrfs_test_super_ops = {
31 .alloc_inode = btrfs_alloc_inode,
32 .destroy_inode = btrfs_test_destroy_inode,
35 static struct dentry *btrfs_test_mount(struct file_system_type *fs_type,
36 int flags, const char *dev_name,
39 return mount_pseudo(fs_type, "btrfs_test:", &btrfs_test_super_ops,
40 NULL, BTRFS_TEST_MAGIC);
43 static struct file_system_type test_type = {
44 .name = "btrfs_test_fs",
45 .mount = btrfs_test_mount,
46 .kill_sb = kill_anon_super,
49 struct inode *btrfs_new_test_inode(void)
51 return new_inode(test_mnt->mnt_sb);
54 static int btrfs_init_test_fs(void)
58 ret = register_filesystem(&test_type);
60 printk(KERN_ERR "btrfs: cannot register test file system\n");
64 test_mnt = kern_mount(&test_type);
65 if (IS_ERR(test_mnt)) {
66 printk(KERN_ERR "btrfs: cannot mount test file system\n");
67 unregister_filesystem(&test_type);
68 return PTR_ERR(test_mnt);
73 static void btrfs_destroy_test_fs(void)
75 kern_unmount(test_mnt);
76 unregister_filesystem(&test_type);
79 struct btrfs_fs_info *btrfs_alloc_dummy_fs_info(u32 nodesize, u32 sectorsize)
81 struct btrfs_fs_info *fs_info = kzalloc(sizeof(struct btrfs_fs_info),
86 fs_info->fs_devices = kzalloc(sizeof(struct btrfs_fs_devices),
88 if (!fs_info->fs_devices) {
92 fs_info->super_copy = kzalloc(sizeof(struct btrfs_super_block),
94 if (!fs_info->super_copy) {
95 kfree(fs_info->fs_devices);
100 fs_info->nodesize = nodesize;
101 fs_info->sectorsize = sectorsize;
103 if (init_srcu_struct(&fs_info->subvol_srcu)) {
104 kfree(fs_info->fs_devices);
105 kfree(fs_info->super_copy);
110 spin_lock_init(&fs_info->buffer_lock);
111 spin_lock_init(&fs_info->qgroup_lock);
112 spin_lock_init(&fs_info->super_lock);
113 spin_lock_init(&fs_info->fs_roots_radix_lock);
114 spin_lock_init(&fs_info->tree_mod_seq_lock);
115 mutex_init(&fs_info->qgroup_ioctl_lock);
116 mutex_init(&fs_info->qgroup_rescan_lock);
117 rwlock_init(&fs_info->tree_mod_log_lock);
118 fs_info->running_transaction = NULL;
119 fs_info->qgroup_tree = RB_ROOT;
120 fs_info->qgroup_ulist = NULL;
121 atomic64_set(&fs_info->tree_mod_seq, 0);
122 INIT_LIST_HEAD(&fs_info->dirty_qgroups);
123 INIT_LIST_HEAD(&fs_info->dead_roots);
124 INIT_LIST_HEAD(&fs_info->tree_mod_seq_list);
125 INIT_RADIX_TREE(&fs_info->buffer_radix, GFP_ATOMIC);
126 INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC);
127 extent_io_tree_init(fs_info, &fs_info->freed_extents[0],
128 IO_TREE_FS_INFO_FREED_EXTENTS0, NULL);
129 extent_io_tree_init(fs_info, &fs_info->freed_extents[1],
130 IO_TREE_FS_INFO_FREED_EXTENTS1, NULL);
131 fs_info->pinned_extents = &fs_info->freed_extents[0];
132 set_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
134 test_mnt->mnt_sb->s_fs_info = fs_info;
139 void btrfs_free_dummy_fs_info(struct btrfs_fs_info *fs_info)
141 struct radix_tree_iter iter;
147 if (WARN_ON(!test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO,
148 &fs_info->fs_state)))
151 test_mnt->mnt_sb->s_fs_info = NULL;
153 spin_lock(&fs_info->buffer_lock);
154 radix_tree_for_each_slot(slot, &fs_info->buffer_radix, &iter, 0) {
155 struct extent_buffer *eb;
157 eb = radix_tree_deref_slot_protected(slot, &fs_info->buffer_lock);
160 /* Shouldn't happen but that kind of thinking creates CVE's */
161 if (radix_tree_exception(eb)) {
162 if (radix_tree_deref_retry(eb))
163 slot = radix_tree_iter_retry(&iter);
166 slot = radix_tree_iter_resume(slot, &iter);
167 spin_unlock(&fs_info->buffer_lock);
168 free_extent_buffer_stale(eb);
169 spin_lock(&fs_info->buffer_lock);
171 spin_unlock(&fs_info->buffer_lock);
173 btrfs_free_qgroup_config(fs_info);
174 btrfs_free_fs_roots(fs_info);
175 cleanup_srcu_struct(&fs_info->subvol_srcu);
176 kfree(fs_info->super_copy);
177 kfree(fs_info->fs_devices);
181 void btrfs_free_dummy_root(struct btrfs_root *root)
185 /* Will be freed by btrfs_free_fs_roots */
186 if (WARN_ON(test_bit(BTRFS_ROOT_IN_RADIX, &root->state)))
189 /* One for allocate_extent_buffer */
190 free_extent_buffer(root->node);
195 struct btrfs_block_group_cache *
196 btrfs_alloc_dummy_block_group(struct btrfs_fs_info *fs_info,
197 unsigned long length)
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->full_stripe_len = fs_info->sectorsize;
215 cache->fs_info = fs_info;
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,
236 struct btrfs_fs_info *fs_info)
238 memset(trans, 0, sizeof(*trans));
240 trans->type = __TRANS_DUMMY;
241 trans->fs_info = fs_info;
244 int btrfs_run_sanity_tests(void)
247 u32 sectorsize, nodesize;
248 u32 test_sectorsize[] = {
251 ret = btrfs_init_test_fs();
254 for (i = 0; i < ARRAY_SIZE(test_sectorsize); i++) {
255 sectorsize = test_sectorsize[i];
256 for (nodesize = sectorsize;
257 nodesize <= BTRFS_MAX_METADATA_BLOCKSIZE;
259 pr_info("BTRFS: selftest: sectorsize: %u nodesize: %u\n",
260 sectorsize, nodesize);
261 ret = btrfs_test_free_space_cache(sectorsize, nodesize);
264 ret = btrfs_test_extent_buffer_operations(sectorsize,
268 ret = btrfs_test_extent_io(sectorsize, nodesize);
271 ret = btrfs_test_inodes(sectorsize, nodesize);
274 ret = btrfs_test_qgroups(sectorsize, nodesize);
277 ret = btrfs_test_free_space_tree(sectorsize, nodesize);
282 ret = btrfs_test_extent_map();
285 btrfs_destroy_test_fs();