1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (C) 2013 Fusion IO. All rights reserved.
7 #include <linux/mount.h>
8 #include <linux/pseudo_fs.h>
9 #include <linux/magic.h>
10 #include "btrfs-tests.h"
12 #include "../free-space-cache.h"
13 #include "../free-space-tree.h"
14 #include "../transaction.h"
15 #include "../volumes.h"
16 #include "../disk-io.h"
17 #include "../qgroup.h"
18 #include "../block-group.h"
21 static struct vfsmount *test_mnt = NULL;
23 const char *test_error[] = {
24 [TEST_ALLOC_FS_INFO] = "cannot allocate fs_info",
25 [TEST_ALLOC_ROOT] = "cannot allocate root",
26 [TEST_ALLOC_EXTENT_BUFFER] = "cannot extent buffer",
27 [TEST_ALLOC_PATH] = "cannot allocate path",
28 [TEST_ALLOC_INODE] = "cannot allocate inode",
29 [TEST_ALLOC_BLOCK_GROUP] = "cannot allocate block group",
30 [TEST_ALLOC_EXTENT_MAP] = "cannot allocate extent map",
33 static const struct super_operations btrfs_test_super_ops = {
34 .alloc_inode = btrfs_alloc_inode,
35 .destroy_inode = btrfs_test_destroy_inode,
39 static int btrfs_test_init_fs_context(struct fs_context *fc)
41 struct pseudo_fs_context *ctx = init_pseudo(fc, BTRFS_TEST_MAGIC);
44 ctx->ops = &btrfs_test_super_ops;
48 static struct file_system_type test_type = {
49 .name = "btrfs_test_fs",
50 .init_fs_context = btrfs_test_init_fs_context,
51 .kill_sb = kill_anon_super,
54 struct inode *btrfs_new_test_inode(void)
58 inode = new_inode(test_mnt->mnt_sb);
62 inode->i_mode = S_IFREG;
63 inode->i_ino = BTRFS_FIRST_FREE_OBJECTID;
64 BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY;
65 BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
66 BTRFS_I(inode)->location.offset = 0;
67 inode_init_owner(&nop_mnt_idmap, inode, NULL, S_IFREG);
72 static int btrfs_init_test_fs(void)
76 ret = register_filesystem(&test_type);
78 printk(KERN_ERR "btrfs: cannot register test file system\n");
82 test_mnt = kern_mount(&test_type);
83 if (IS_ERR(test_mnt)) {
84 printk(KERN_ERR "btrfs: cannot mount test file system\n");
85 unregister_filesystem(&test_type);
86 return PTR_ERR(test_mnt);
91 static void btrfs_destroy_test_fs(void)
93 kern_unmount(test_mnt);
94 unregister_filesystem(&test_type);
97 struct btrfs_device *btrfs_alloc_dummy_device(struct btrfs_fs_info *fs_info)
99 struct btrfs_device *dev;
101 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
103 return ERR_PTR(-ENOMEM);
105 extent_io_tree_init(NULL, &dev->alloc_state, 0);
106 INIT_LIST_HEAD(&dev->dev_list);
107 list_add(&dev->dev_list, &fs_info->fs_devices->devices);
112 static void btrfs_free_dummy_device(struct btrfs_device *dev)
114 extent_io_tree_release(&dev->alloc_state);
118 struct btrfs_fs_info *btrfs_alloc_dummy_fs_info(u32 nodesize, u32 sectorsize)
120 struct btrfs_fs_info *fs_info = kzalloc(sizeof(struct btrfs_fs_info),
125 fs_info->fs_devices = kzalloc(sizeof(struct btrfs_fs_devices),
127 if (!fs_info->fs_devices) {
131 INIT_LIST_HEAD(&fs_info->fs_devices->devices);
133 fs_info->super_copy = kzalloc(sizeof(struct btrfs_super_block),
135 if (!fs_info->super_copy) {
136 kfree(fs_info->fs_devices);
141 btrfs_init_fs_info(fs_info);
143 fs_info->nodesize = nodesize;
144 fs_info->sectorsize = sectorsize;
145 fs_info->sectorsize_bits = ilog2(sectorsize);
146 set_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
148 test_mnt->mnt_sb->s_fs_info = fs_info;
153 void btrfs_free_dummy_fs_info(struct btrfs_fs_info *fs_info)
155 struct radix_tree_iter iter;
157 struct btrfs_device *dev, *tmp;
162 if (WARN_ON(!test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO,
163 &fs_info->fs_state)))
166 test_mnt->mnt_sb->s_fs_info = NULL;
168 spin_lock(&fs_info->buffer_lock);
169 radix_tree_for_each_slot(slot, &fs_info->buffer_radix, &iter, 0) {
170 struct extent_buffer *eb;
172 eb = radix_tree_deref_slot_protected(slot, &fs_info->buffer_lock);
175 /* Shouldn't happen but that kind of thinking creates CVE's */
176 if (radix_tree_exception(eb)) {
177 if (radix_tree_deref_retry(eb))
178 slot = radix_tree_iter_retry(&iter);
181 slot = radix_tree_iter_resume(slot, &iter);
182 spin_unlock(&fs_info->buffer_lock);
183 free_extent_buffer_stale(eb);
184 spin_lock(&fs_info->buffer_lock);
186 spin_unlock(&fs_info->buffer_lock);
188 btrfs_mapping_tree_free(&fs_info->mapping_tree);
189 list_for_each_entry_safe(dev, tmp, &fs_info->fs_devices->devices,
191 btrfs_free_dummy_device(dev);
193 btrfs_free_qgroup_config(fs_info);
194 btrfs_free_fs_roots(fs_info);
195 kfree(fs_info->super_copy);
196 btrfs_check_leaked_roots(fs_info);
197 btrfs_extent_buffer_leak_debug_check(fs_info);
198 kfree(fs_info->fs_devices);
202 void btrfs_free_dummy_root(struct btrfs_root *root)
204 if (IS_ERR_OR_NULL(root))
206 /* Will be freed by btrfs_free_fs_roots */
207 if (WARN_ON(test_bit(BTRFS_ROOT_IN_RADIX, &root->state)))
209 btrfs_global_root_delete(root);
210 btrfs_put_root(root);
213 struct btrfs_block_group *
214 btrfs_alloc_dummy_block_group(struct btrfs_fs_info *fs_info,
215 unsigned long length)
217 struct btrfs_block_group *cache;
219 cache = kzalloc(sizeof(*cache), GFP_KERNEL);
222 cache->free_space_ctl = kzalloc(sizeof(*cache->free_space_ctl),
224 if (!cache->free_space_ctl) {
230 cache->length = length;
231 cache->full_stripe_len = fs_info->sectorsize;
232 cache->fs_info = fs_info;
234 INIT_LIST_HEAD(&cache->list);
235 INIT_LIST_HEAD(&cache->cluster_list);
236 INIT_LIST_HEAD(&cache->bg_list);
237 btrfs_init_free_space_ctl(cache, cache->free_space_ctl);
238 mutex_init(&cache->free_space_lock);
243 void btrfs_free_dummy_block_group(struct btrfs_block_group *cache)
247 btrfs_remove_free_space_cache(cache);
248 kfree(cache->free_space_ctl);
252 void btrfs_init_dummy_trans(struct btrfs_trans_handle *trans,
253 struct btrfs_fs_info *fs_info)
255 memset(trans, 0, sizeof(*trans));
257 trans->type = __TRANS_DUMMY;
258 trans->fs_info = fs_info;
261 int btrfs_run_sanity_tests(void)
264 u32 sectorsize, nodesize;
265 u32 test_sectorsize[] = {
268 ret = btrfs_init_test_fs();
271 for (i = 0; i < ARRAY_SIZE(test_sectorsize); i++) {
272 sectorsize = test_sectorsize[i];
273 for (nodesize = sectorsize;
274 nodesize <= BTRFS_MAX_METADATA_BLOCKSIZE;
276 pr_info("BTRFS: selftest: sectorsize: %u nodesize: %u\n",
277 sectorsize, nodesize);
278 ret = btrfs_test_free_space_cache(sectorsize, nodesize);
281 ret = btrfs_test_extent_buffer_operations(sectorsize,
285 ret = btrfs_test_extent_io(sectorsize, nodesize);
288 ret = btrfs_test_inodes(sectorsize, nodesize);
291 ret = btrfs_test_qgroups(sectorsize, nodesize);
294 ret = btrfs_test_free_space_tree(sectorsize, nodesize);
299 ret = btrfs_test_extent_map();
302 btrfs_destroy_test_fs();