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1/*
2 * Copyright (C) 2013 Fusion IO. All rights reserved.
3 *
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.
7 *
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.
12 *
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.
17 */
18
19#include <linux/fs.h>
20#include <linux/mount.h>
21#include <linux/magic.h>
22#include "btrfs-tests.h"
23#include "../ctree.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"
30
31static struct vfsmount *test_mnt = NULL;
32
33static const struct super_operations btrfs_test_super_ops = {
34 .alloc_inode = btrfs_alloc_inode,
35 .destroy_inode = btrfs_test_destroy_inode,
36};
37
38static struct dentry *btrfs_test_mount(struct file_system_type *fs_type,
39 int flags, const char *dev_name,
40 void *data)
41{
42 return mount_pseudo(fs_type, "btrfs_test:", &btrfs_test_super_ops,
43 NULL, BTRFS_TEST_MAGIC);
44}
45
46static struct file_system_type test_type = {
47 .name = "btrfs_test_fs",
48 .mount = btrfs_test_mount,
49 .kill_sb = kill_anon_super,
50};
51
52struct inode *btrfs_new_test_inode(void)
53{
54 return new_inode(test_mnt->mnt_sb);
55}
56
57int btrfs_init_test_fs(void)
58{
59 int ret;
60
61 ret = register_filesystem(&test_type);
62 if (ret) {
63 printk(KERN_ERR "btrfs: cannot register test file system\n");
64 return ret;
65 }
66
67 test_mnt = kern_mount(&test_type);
68 if (IS_ERR(test_mnt)) {
69 printk(KERN_ERR "btrfs: cannot mount test file system\n");
70 unregister_filesystem(&test_type);
71 return ret;
72 }
73 return 0;
74}
75
76void btrfs_destroy_test_fs(void)
77{
78 kern_unmount(test_mnt);
79 unregister_filesystem(&test_type);
80}
81
82struct btrfs_fs_info *btrfs_alloc_dummy_fs_info(void)
83{
84 struct btrfs_fs_info *fs_info = kzalloc(sizeof(struct btrfs_fs_info),
85 GFP_KERNEL);
86
87 if (!fs_info)
88 return fs_info;
89 fs_info->fs_devices = kzalloc(sizeof(struct btrfs_fs_devices),
90 GFP_KERNEL);
91 if (!fs_info->fs_devices) {
92 kfree(fs_info);
93 return NULL;
94 }
95 fs_info->super_copy = kzalloc(sizeof(struct btrfs_super_block),
96 GFP_KERNEL);
97 if (!fs_info->super_copy) {
98 kfree(fs_info->fs_devices);
99 kfree(fs_info);
100 return NULL;
101 }
102
103 if (init_srcu_struct(&fs_info->subvol_srcu)) {
104 kfree(fs_info->fs_devices);
105 kfree(fs_info->super_copy);
106 kfree(fs_info);
107 return NULL;
108 }
109
110 spin_lock_init(&fs_info->buffer_lock);
111 spin_lock_init(&fs_info->qgroup_lock);
112 spin_lock_init(&fs_info->qgroup_op_lock);
113 spin_lock_init(&fs_info->super_lock);
114 spin_lock_init(&fs_info->fs_roots_radix_lock);
115 spin_lock_init(&fs_info->tree_mod_seq_lock);
116 mutex_init(&fs_info->qgroup_ioctl_lock);
117 mutex_init(&fs_info->qgroup_rescan_lock);
118 rwlock_init(&fs_info->tree_mod_log_lock);
119 fs_info->running_transaction = NULL;
120 fs_info->qgroup_tree = RB_ROOT;
121 fs_info->qgroup_ulist = NULL;
122 atomic64_set(&fs_info->tree_mod_seq, 0);
123 INIT_LIST_HEAD(&fs_info->dirty_qgroups);
124 INIT_LIST_HEAD(&fs_info->dead_roots);
125 INIT_LIST_HEAD(&fs_info->tree_mod_seq_list);
126 INIT_RADIX_TREE(&fs_info->buffer_radix, GFP_ATOMIC);
127 INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC);
128 extent_io_tree_init(&fs_info->freed_extents[0], NULL);
129 extent_io_tree_init(&fs_info->freed_extents[1], NULL);
130 fs_info->pinned_extents = &fs_info->freed_extents[0];
131 return fs_info;
132}
133
134static void btrfs_free_dummy_fs_info(struct btrfs_fs_info *fs_info)
135{
136 struct radix_tree_iter iter;
137 void **slot;
138
139 spin_lock(&fs_info->buffer_lock);
140 radix_tree_for_each_slot(slot, &fs_info->buffer_radix, &iter, 0) {
141 struct extent_buffer *eb;
142
143 eb = radix_tree_deref_slot_protected(slot, &fs_info->buffer_lock);
144 if (!eb)
145 continue;
146 /* Shouldn't happen but that kind of thinking creates CVE's */
147 if (radix_tree_exception(eb)) {
148 if (radix_tree_deref_retry(eb))
149 slot = radix_tree_iter_retry(&iter);
150 continue;
151 }
152 spin_unlock(&fs_info->buffer_lock);
153 free_extent_buffer_stale(eb);
154 spin_lock(&fs_info->buffer_lock);
155 }
156 spin_unlock(&fs_info->buffer_lock);
157
158 btrfs_free_qgroup_config(fs_info);
159 btrfs_free_fs_roots(fs_info);
160 cleanup_srcu_struct(&fs_info->subvol_srcu);
161 kfree(fs_info->super_copy);
162 kfree(fs_info->fs_devices);
163 kfree(fs_info);
164}
165
166void btrfs_free_dummy_root(struct btrfs_root *root)
167{
168 if (!root)
169 return;
170 if (root->node)
171 free_extent_buffer(root->node);
172 if (root->fs_info)
173 btrfs_free_dummy_fs_info(root->fs_info);
174 kfree(root);
175}
176
177struct btrfs_block_group_cache *
178btrfs_alloc_dummy_block_group(unsigned long length)
179{
180 struct btrfs_block_group_cache *cache;
181
182 cache = kzalloc(sizeof(*cache), GFP_KERNEL);
183 if (!cache)
184 return NULL;
185 cache->free_space_ctl = kzalloc(sizeof(*cache->free_space_ctl),
186 GFP_KERNEL);
187 if (!cache->free_space_ctl) {
188 kfree(cache);
189 return NULL;
190 }
191
192 cache->key.objectid = 0;
193 cache->key.offset = length;
194 cache->key.type = BTRFS_BLOCK_GROUP_ITEM_KEY;
195 cache->sectorsize = 4096;
196 cache->full_stripe_len = 4096;
197
198 INIT_LIST_HEAD(&cache->list);
199 INIT_LIST_HEAD(&cache->cluster_list);
200 INIT_LIST_HEAD(&cache->bg_list);
201 btrfs_init_free_space_ctl(cache);
202 mutex_init(&cache->free_space_lock);
203
204 return cache;
205}
206
207void btrfs_free_dummy_block_group(struct btrfs_block_group_cache *cache)
208{
209 if (!cache)
210 return;
211 __btrfs_remove_free_space_cache(cache->free_space_ctl);
212 kfree(cache->free_space_ctl);
213 kfree(cache);
214}
215
216void btrfs_init_dummy_trans(struct btrfs_trans_handle *trans)
217{
218 memset(trans, 0, sizeof(*trans));
219 trans->transid = 1;
220 INIT_LIST_HEAD(&trans->qgroup_ref_list);
221 trans->type = __TRANS_DUMMY;
222}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2013 Fusion IO. All rights reserved.
4 */
5
6#include <linux/fs.h>
7#include <linux/mount.h>
8#include <linux/pseudo_fs.h>
9#include <linux/magic.h>
10#include "btrfs-tests.h"
11#include "../ctree.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"
19
20static struct vfsmount *test_mnt = NULL;
21
22const char *test_error[] = {
23 [TEST_ALLOC_FS_INFO] = "cannot allocate fs_info",
24 [TEST_ALLOC_ROOT] = "cannot allocate root",
25 [TEST_ALLOC_EXTENT_BUFFER] = "cannot extent buffer",
26 [TEST_ALLOC_PATH] = "cannot allocate path",
27 [TEST_ALLOC_INODE] = "cannot allocate inode",
28 [TEST_ALLOC_BLOCK_GROUP] = "cannot allocate block group",
29 [TEST_ALLOC_EXTENT_MAP] = "cannot allocate extent map",
30};
31
32static const struct super_operations btrfs_test_super_ops = {
33 .alloc_inode = btrfs_alloc_inode,
34 .destroy_inode = btrfs_test_destroy_inode,
35};
36
37
38static int btrfs_test_init_fs_context(struct fs_context *fc)
39{
40 struct pseudo_fs_context *ctx = init_pseudo(fc, BTRFS_TEST_MAGIC);
41 if (!ctx)
42 return -ENOMEM;
43 ctx->ops = &btrfs_test_super_ops;
44 return 0;
45}
46
47static struct file_system_type test_type = {
48 .name = "btrfs_test_fs",
49 .init_fs_context = btrfs_test_init_fs_context,
50 .kill_sb = kill_anon_super,
51};
52
53struct inode *btrfs_new_test_inode(void)
54{
55 struct inode *inode;
56
57 inode = new_inode(test_mnt->mnt_sb);
58 if (!inode)
59 return NULL;
60
61 inode->i_mode = S_IFREG;
62 BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY;
63 BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
64 BTRFS_I(inode)->location.offset = 0;
65 inode_init_owner(&init_user_ns, inode, NULL, S_IFREG);
66
67 return inode;
68}
69
70static int btrfs_init_test_fs(void)
71{
72 int ret;
73
74 ret = register_filesystem(&test_type);
75 if (ret) {
76 printk(KERN_ERR "btrfs: cannot register test file system\n");
77 return ret;
78 }
79
80 test_mnt = kern_mount(&test_type);
81 if (IS_ERR(test_mnt)) {
82 printk(KERN_ERR "btrfs: cannot mount test file system\n");
83 unregister_filesystem(&test_type);
84 return PTR_ERR(test_mnt);
85 }
86 return 0;
87}
88
89static void btrfs_destroy_test_fs(void)
90{
91 kern_unmount(test_mnt);
92 unregister_filesystem(&test_type);
93}
94
95struct btrfs_device *btrfs_alloc_dummy_device(struct btrfs_fs_info *fs_info)
96{
97 struct btrfs_device *dev;
98
99 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
100 if (!dev)
101 return ERR_PTR(-ENOMEM);
102
103 extent_io_tree_init(NULL, &dev->alloc_state, 0, NULL);
104 INIT_LIST_HEAD(&dev->dev_list);
105 list_add(&dev->dev_list, &fs_info->fs_devices->devices);
106
107 return dev;
108}
109
110static void btrfs_free_dummy_device(struct btrfs_device *dev)
111{
112 extent_io_tree_release(&dev->alloc_state);
113 kfree(dev);
114}
115
116struct btrfs_fs_info *btrfs_alloc_dummy_fs_info(u32 nodesize, u32 sectorsize)
117{
118 struct btrfs_fs_info *fs_info = kzalloc(sizeof(struct btrfs_fs_info),
119 GFP_KERNEL);
120
121 if (!fs_info)
122 return fs_info;
123 fs_info->fs_devices = kzalloc(sizeof(struct btrfs_fs_devices),
124 GFP_KERNEL);
125 if (!fs_info->fs_devices) {
126 kfree(fs_info);
127 return NULL;
128 }
129 INIT_LIST_HEAD(&fs_info->fs_devices->devices);
130
131 fs_info->super_copy = kzalloc(sizeof(struct btrfs_super_block),
132 GFP_KERNEL);
133 if (!fs_info->super_copy) {
134 kfree(fs_info->fs_devices);
135 kfree(fs_info);
136 return NULL;
137 }
138
139 btrfs_init_fs_info(fs_info);
140
141 fs_info->nodesize = nodesize;
142 fs_info->sectorsize = sectorsize;
143 fs_info->sectorsize_bits = ilog2(sectorsize);
144 set_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
145
146 test_mnt->mnt_sb->s_fs_info = fs_info;
147
148 return fs_info;
149}
150
151void btrfs_free_dummy_fs_info(struct btrfs_fs_info *fs_info)
152{
153 struct radix_tree_iter iter;
154 void **slot;
155 struct btrfs_device *dev, *tmp;
156
157 if (!fs_info)
158 return;
159
160 if (WARN_ON(!test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO,
161 &fs_info->fs_state)))
162 return;
163
164 test_mnt->mnt_sb->s_fs_info = NULL;
165
166 spin_lock(&fs_info->buffer_lock);
167 radix_tree_for_each_slot(slot, &fs_info->buffer_radix, &iter, 0) {
168 struct extent_buffer *eb;
169
170 eb = radix_tree_deref_slot_protected(slot, &fs_info->buffer_lock);
171 if (!eb)
172 continue;
173 /* Shouldn't happen but that kind of thinking creates CVE's */
174 if (radix_tree_exception(eb)) {
175 if (radix_tree_deref_retry(eb))
176 slot = radix_tree_iter_retry(&iter);
177 continue;
178 }
179 slot = radix_tree_iter_resume(slot, &iter);
180 spin_unlock(&fs_info->buffer_lock);
181 free_extent_buffer_stale(eb);
182 spin_lock(&fs_info->buffer_lock);
183 }
184 spin_unlock(&fs_info->buffer_lock);
185
186 btrfs_mapping_tree_free(&fs_info->mapping_tree);
187 list_for_each_entry_safe(dev, tmp, &fs_info->fs_devices->devices,
188 dev_list) {
189 btrfs_free_dummy_device(dev);
190 }
191 btrfs_free_qgroup_config(fs_info);
192 btrfs_free_fs_roots(fs_info);
193 kfree(fs_info->super_copy);
194 btrfs_check_leaked_roots(fs_info);
195 btrfs_extent_buffer_leak_debug_check(fs_info);
196 kfree(fs_info->fs_devices);
197 kfree(fs_info);
198}
199
200void btrfs_free_dummy_root(struct btrfs_root *root)
201{
202 if (!root)
203 return;
204 /* Will be freed by btrfs_free_fs_roots */
205 if (WARN_ON(test_bit(BTRFS_ROOT_IN_RADIX, &root->state)))
206 return;
207 btrfs_put_root(root);
208}
209
210struct btrfs_block_group *
211btrfs_alloc_dummy_block_group(struct btrfs_fs_info *fs_info,
212 unsigned long length)
213{
214 struct btrfs_block_group *cache;
215
216 cache = kzalloc(sizeof(*cache), GFP_KERNEL);
217 if (!cache)
218 return NULL;
219 cache->free_space_ctl = kzalloc(sizeof(*cache->free_space_ctl),
220 GFP_KERNEL);
221 if (!cache->free_space_ctl) {
222 kfree(cache);
223 return NULL;
224 }
225
226 cache->start = 0;
227 cache->length = length;
228 cache->full_stripe_len = fs_info->sectorsize;
229 cache->fs_info = fs_info;
230
231 INIT_LIST_HEAD(&cache->list);
232 INIT_LIST_HEAD(&cache->cluster_list);
233 INIT_LIST_HEAD(&cache->bg_list);
234 btrfs_init_free_space_ctl(cache, cache->free_space_ctl);
235 mutex_init(&cache->free_space_lock);
236
237 return cache;
238}
239
240void btrfs_free_dummy_block_group(struct btrfs_block_group *cache)
241{
242 if (!cache)
243 return;
244 __btrfs_remove_free_space_cache(cache->free_space_ctl);
245 kfree(cache->free_space_ctl);
246 kfree(cache);
247}
248
249void btrfs_init_dummy_trans(struct btrfs_trans_handle *trans,
250 struct btrfs_fs_info *fs_info)
251{
252 memset(trans, 0, sizeof(*trans));
253 trans->transid = 1;
254 trans->type = __TRANS_DUMMY;
255 trans->fs_info = fs_info;
256}
257
258int btrfs_run_sanity_tests(void)
259{
260 int ret, i;
261 u32 sectorsize, nodesize;
262 u32 test_sectorsize[] = {
263 PAGE_SIZE,
264 };
265 ret = btrfs_init_test_fs();
266 if (ret)
267 return ret;
268 for (i = 0; i < ARRAY_SIZE(test_sectorsize); i++) {
269 sectorsize = test_sectorsize[i];
270 for (nodesize = sectorsize;
271 nodesize <= BTRFS_MAX_METADATA_BLOCKSIZE;
272 nodesize <<= 1) {
273 pr_info("BTRFS: selftest: sectorsize: %u nodesize: %u\n",
274 sectorsize, nodesize);
275 ret = btrfs_test_free_space_cache(sectorsize, nodesize);
276 if (ret)
277 goto out;
278 ret = btrfs_test_extent_buffer_operations(sectorsize,
279 nodesize);
280 if (ret)
281 goto out;
282 ret = btrfs_test_extent_io(sectorsize, nodesize);
283 if (ret)
284 goto out;
285 ret = btrfs_test_inodes(sectorsize, nodesize);
286 if (ret)
287 goto out;
288 ret = btrfs_test_qgroups(sectorsize, nodesize);
289 if (ret)
290 goto out;
291 ret = btrfs_test_free_space_tree(sectorsize, nodesize);
292 if (ret)
293 goto out;
294 }
295 }
296 ret = btrfs_test_extent_map();
297
298out:
299 btrfs_destroy_test_fs();
300 return ret;
301}