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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#include "../fs.h"
20
21static struct vfsmount *test_mnt = NULL;
22
23const 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",
31 [TEST_ALLOC_CHUNK_MAP] = "cannot allocate chunk map",
32 [TEST_ALLOC_IO_CONTEXT] = "cannot allocate io context",
33};
34
35static const struct super_operations btrfs_test_super_ops = {
36 .alloc_inode = btrfs_alloc_inode,
37 .destroy_inode = btrfs_test_destroy_inode,
38};
39
40
41static int btrfs_test_init_fs_context(struct fs_context *fc)
42{
43 struct pseudo_fs_context *ctx = init_pseudo(fc, BTRFS_TEST_MAGIC);
44 if (!ctx)
45 return -ENOMEM;
46 ctx->ops = &btrfs_test_super_ops;
47 return 0;
48}
49
50static struct file_system_type test_type = {
51 .name = "btrfs_test_fs",
52 .init_fs_context = btrfs_test_init_fs_context,
53 .kill_sb = kill_anon_super,
54};
55
56struct inode *btrfs_new_test_inode(void)
57{
58 struct inode *inode;
59
60 inode = new_inode(test_mnt->mnt_sb);
61 if (!inode)
62 return NULL;
63
64 inode->i_mode = S_IFREG;
65 btrfs_set_inode_number(BTRFS_I(inode), BTRFS_FIRST_FREE_OBJECTID);
66 inode_init_owner(&nop_mnt_idmap, inode, NULL, S_IFREG);
67
68 return inode;
69}
70
71static int btrfs_init_test_fs(void)
72{
73 int ret;
74
75 ret = register_filesystem(&test_type);
76 if (ret) {
77 printk(KERN_ERR "btrfs: cannot register test file system\n");
78 return ret;
79 }
80
81 test_mnt = kern_mount(&test_type);
82 if (IS_ERR(test_mnt)) {
83 printk(KERN_ERR "btrfs: cannot mount test file system\n");
84 unregister_filesystem(&test_type);
85 return PTR_ERR(test_mnt);
86 }
87 return 0;
88}
89
90static void btrfs_destroy_test_fs(void)
91{
92 kern_unmount(test_mnt);
93 unregister_filesystem(&test_type);
94}
95
96struct btrfs_device *btrfs_alloc_dummy_device(struct btrfs_fs_info *fs_info)
97{
98 struct btrfs_device *dev;
99
100 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
101 if (!dev)
102 return ERR_PTR(-ENOMEM);
103
104 extent_io_tree_init(fs_info, &dev->alloc_state, 0);
105 INIT_LIST_HEAD(&dev->dev_list);
106 list_add(&dev->dev_list, &fs_info->fs_devices->devices);
107
108 return dev;
109}
110
111static void btrfs_free_dummy_device(struct btrfs_device *dev)
112{
113 extent_io_tree_release(&dev->alloc_state);
114 kfree(dev);
115}
116
117struct btrfs_fs_info *btrfs_alloc_dummy_fs_info(u32 nodesize, u32 sectorsize)
118{
119 struct btrfs_fs_info *fs_info = kzalloc(sizeof(struct btrfs_fs_info),
120 GFP_KERNEL);
121
122 if (!fs_info)
123 return fs_info;
124 fs_info->fs_devices = kzalloc(sizeof(struct btrfs_fs_devices),
125 GFP_KERNEL);
126 if (!fs_info->fs_devices) {
127 kfree(fs_info);
128 return NULL;
129 }
130 INIT_LIST_HEAD(&fs_info->fs_devices->devices);
131
132 fs_info->super_copy = kzalloc(sizeof(struct btrfs_super_block),
133 GFP_KERNEL);
134 if (!fs_info->super_copy) {
135 kfree(fs_info->fs_devices);
136 kfree(fs_info);
137 return NULL;
138 }
139
140 btrfs_init_fs_info(fs_info);
141
142 fs_info->nodesize = nodesize;
143 fs_info->sectorsize = sectorsize;
144 fs_info->sectorsize_bits = ilog2(sectorsize);
145 set_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
146
147 test_mnt->mnt_sb->s_fs_info = fs_info;
148
149 return fs_info;
150}
151
152void btrfs_free_dummy_fs_info(struct btrfs_fs_info *fs_info)
153{
154 struct radix_tree_iter iter;
155 void **slot;
156 struct btrfs_device *dev, *tmp;
157
158 if (!fs_info)
159 return;
160
161 if (WARN_ON(!btrfs_is_testing(fs_info)))
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);
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 (IS_ERR_OR_NULL(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_global_root_delete(root);
208 btrfs_put_root(root);
209}
210
211struct btrfs_block_group *
212btrfs_alloc_dummy_block_group(struct btrfs_fs_info *fs_info,
213 unsigned long length)
214{
215 struct btrfs_block_group *cache;
216
217 cache = kzalloc(sizeof(*cache), GFP_KERNEL);
218 if (!cache)
219 return NULL;
220 cache->free_space_ctl = kzalloc(sizeof(*cache->free_space_ctl),
221 GFP_KERNEL);
222 if (!cache->free_space_ctl) {
223 kfree(cache);
224 return NULL;
225 }
226
227 cache->start = 0;
228 cache->length = length;
229 cache->full_stripe_len = fs_info->sectorsize;
230 cache->fs_info = fs_info;
231
232 INIT_LIST_HEAD(&cache->list);
233 INIT_LIST_HEAD(&cache->cluster_list);
234 INIT_LIST_HEAD(&cache->bg_list);
235 btrfs_init_free_space_ctl(cache, cache->free_space_ctl);
236 mutex_init(&cache->free_space_lock);
237
238 return cache;
239}
240
241void btrfs_free_dummy_block_group(struct btrfs_block_group *cache)
242{
243 if (!cache)
244 return;
245 btrfs_remove_free_space_cache(cache);
246 kfree(cache->free_space_ctl);
247 kfree(cache);
248}
249
250void btrfs_init_dummy_trans(struct btrfs_trans_handle *trans,
251 struct btrfs_fs_info *fs_info)
252{
253 memset(trans, 0, sizeof(*trans));
254 trans->transid = 1;
255 trans->type = __TRANS_DUMMY;
256 trans->fs_info = fs_info;
257}
258
259int btrfs_run_sanity_tests(void)
260{
261 int ret, i;
262 u32 sectorsize, nodesize;
263 u32 test_sectorsize[] = {
264 PAGE_SIZE,
265 };
266 ret = btrfs_init_test_fs();
267 if (ret)
268 return ret;
269 for (i = 0; i < ARRAY_SIZE(test_sectorsize); i++) {
270 sectorsize = test_sectorsize[i];
271 for (nodesize = sectorsize;
272 nodesize <= BTRFS_MAX_METADATA_BLOCKSIZE;
273 nodesize <<= 1) {
274 pr_info("BTRFS: selftest: sectorsize: %u nodesize: %u\n",
275 sectorsize, nodesize);
276 ret = btrfs_test_free_space_cache(sectorsize, nodesize);
277 if (ret)
278 goto out;
279 ret = btrfs_test_extent_buffer_operations(sectorsize,
280 nodesize);
281 if (ret)
282 goto out;
283 ret = btrfs_test_extent_io(sectorsize, nodesize);
284 if (ret)
285 goto out;
286 ret = btrfs_test_inodes(sectorsize, nodesize);
287 if (ret)
288 goto out;
289 ret = btrfs_test_qgroups(sectorsize, nodesize);
290 if (ret)
291 goto out;
292 ret = btrfs_test_free_space_tree(sectorsize, nodesize);
293 if (ret)
294 goto out;
295 ret = btrfs_test_raid_stripe_tree(sectorsize, nodesize);
296 if (ret)
297 goto out;
298 }
299 }
300 ret = btrfs_test_extent_map();
301
302out:
303 btrfs_destroy_test_fs();
304 return ret;
305}
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/magic.h>
9#include "btrfs-tests.h"
10#include "../ctree.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"
17
18static struct vfsmount *test_mnt = NULL;
19
20static const struct super_operations btrfs_test_super_ops = {
21 .alloc_inode = btrfs_alloc_inode,
22 .destroy_inode = btrfs_test_destroy_inode,
23};
24
25static struct dentry *btrfs_test_mount(struct file_system_type *fs_type,
26 int flags, const char *dev_name,
27 void *data)
28{
29 return mount_pseudo(fs_type, "btrfs_test:", &btrfs_test_super_ops,
30 NULL, BTRFS_TEST_MAGIC);
31}
32
33static struct file_system_type test_type = {
34 .name = "btrfs_test_fs",
35 .mount = btrfs_test_mount,
36 .kill_sb = kill_anon_super,
37};
38
39struct inode *btrfs_new_test_inode(void)
40{
41 return new_inode(test_mnt->mnt_sb);
42}
43
44static int btrfs_init_test_fs(void)
45{
46 int ret;
47
48 ret = register_filesystem(&test_type);
49 if (ret) {
50 printk(KERN_ERR "btrfs: cannot register test file system\n");
51 return ret;
52 }
53
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);
59 }
60 return 0;
61}
62
63static void btrfs_destroy_test_fs(void)
64{
65 kern_unmount(test_mnt);
66 unregister_filesystem(&test_type);
67}
68
69struct btrfs_fs_info *btrfs_alloc_dummy_fs_info(u32 nodesize, u32 sectorsize)
70{
71 struct btrfs_fs_info *fs_info = kzalloc(sizeof(struct btrfs_fs_info),
72 GFP_KERNEL);
73
74 if (!fs_info)
75 return fs_info;
76 fs_info->fs_devices = kzalloc(sizeof(struct btrfs_fs_devices),
77 GFP_KERNEL);
78 if (!fs_info->fs_devices) {
79 kfree(fs_info);
80 return NULL;
81 }
82 fs_info->super_copy = kzalloc(sizeof(struct btrfs_super_block),
83 GFP_KERNEL);
84 if (!fs_info->super_copy) {
85 kfree(fs_info->fs_devices);
86 kfree(fs_info);
87 return NULL;
88 }
89
90 fs_info->nodesize = nodesize;
91 fs_info->sectorsize = sectorsize;
92
93 if (init_srcu_struct(&fs_info->subvol_srcu)) {
94 kfree(fs_info->fs_devices);
95 kfree(fs_info->super_copy);
96 kfree(fs_info);
97 return NULL;
98 }
99
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);
122
123 test_mnt->mnt_sb->s_fs_info = fs_info;
124
125 return fs_info;
126}
127
128void btrfs_free_dummy_fs_info(struct btrfs_fs_info *fs_info)
129{
130 struct radix_tree_iter iter;
131 void **slot;
132
133 if (!fs_info)
134 return;
135
136 if (WARN_ON(!test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO,
137 &fs_info->fs_state)))
138 return;
139
140 test_mnt->mnt_sb->s_fs_info = NULL;
141
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;
145
146 eb = radix_tree_deref_slot_protected(slot, &fs_info->buffer_lock);
147 if (!eb)
148 continue;
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);
153 continue;
154 }
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);
159 }
160 spin_unlock(&fs_info->buffer_lock);
161
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);
167 kfree(fs_info);
168}
169
170void btrfs_free_dummy_root(struct btrfs_root *root)
171{
172 if (!root)
173 return;
174 /* Will be freed by btrfs_free_fs_roots */
175 if (WARN_ON(test_bit(BTRFS_ROOT_IN_RADIX, &root->state)))
176 return;
177 if (root->node)
178 free_extent_buffer(root->node);
179 kfree(root);
180}
181
182struct btrfs_block_group_cache *
183btrfs_alloc_dummy_block_group(struct btrfs_fs_info *fs_info,
184 unsigned long length)
185{
186 struct btrfs_block_group_cache *cache;
187
188 cache = kzalloc(sizeof(*cache), GFP_KERNEL);
189 if (!cache)
190 return NULL;
191 cache->free_space_ctl = kzalloc(sizeof(*cache->free_space_ctl),
192 GFP_KERNEL);
193 if (!cache->free_space_ctl) {
194 kfree(cache);
195 return NULL;
196 }
197
198 cache->key.objectid = 0;
199 cache->key.offset = length;
200 cache->key.type = BTRFS_BLOCK_GROUP_ITEM_KEY;
201 cache->full_stripe_len = fs_info->sectorsize;
202 cache->fs_info = fs_info;
203
204 INIT_LIST_HEAD(&cache->list);
205 INIT_LIST_HEAD(&cache->cluster_list);
206 INIT_LIST_HEAD(&cache->bg_list);
207 btrfs_init_free_space_ctl(cache);
208 mutex_init(&cache->free_space_lock);
209
210 return cache;
211}
212
213void btrfs_free_dummy_block_group(struct btrfs_block_group_cache *cache)
214{
215 if (!cache)
216 return;
217 __btrfs_remove_free_space_cache(cache->free_space_ctl);
218 kfree(cache->free_space_ctl);
219 kfree(cache);
220}
221
222void btrfs_init_dummy_trans(struct btrfs_trans_handle *trans)
223{
224 memset(trans, 0, sizeof(*trans));
225 trans->transid = 1;
226 trans->type = __TRANS_DUMMY;
227}
228
229int btrfs_run_sanity_tests(void)
230{
231 int ret, i;
232 u32 sectorsize, nodesize;
233 u32 test_sectorsize[] = {
234 PAGE_SIZE,
235 };
236 ret = btrfs_init_test_fs();
237 if (ret)
238 return ret;
239 for (i = 0; i < ARRAY_SIZE(test_sectorsize); i++) {
240 sectorsize = test_sectorsize[i];
241 for (nodesize = sectorsize;
242 nodesize <= BTRFS_MAX_METADATA_BLOCKSIZE;
243 nodesize <<= 1) {
244 pr_info("BTRFS: selftest: sectorsize: %u nodesize: %u\n",
245 sectorsize, nodesize);
246 ret = btrfs_test_free_space_cache(sectorsize, nodesize);
247 if (ret)
248 goto out;
249 ret = btrfs_test_extent_buffer_operations(sectorsize,
250 nodesize);
251 if (ret)
252 goto out;
253 ret = btrfs_test_extent_io(sectorsize, nodesize);
254 if (ret)
255 goto out;
256 ret = btrfs_test_inodes(sectorsize, nodesize);
257 if (ret)
258 goto out;
259 ret = btrfs_test_qgroups(sectorsize, nodesize);
260 if (ret)
261 goto out;
262 ret = btrfs_test_free_space_tree(sectorsize, nodesize);
263 if (ret)
264 goto out;
265 }
266 }
267 ret = btrfs_test_extent_map();
268
269out:
270 btrfs_destroy_test_fs();
271 return ret;
272}