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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
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 inode_init_owner(inode, NULL, S_IFREG);
60
61 return inode;
62}
63
64static int btrfs_init_test_fs(void)
65{
66 int ret;
67
68 ret = register_filesystem(&test_type);
69 if (ret) {
70 printk(KERN_ERR "btrfs: cannot register test file system\n");
71 return ret;
72 }
73
74 test_mnt = kern_mount(&test_type);
75 if (IS_ERR(test_mnt)) {
76 printk(KERN_ERR "btrfs: cannot mount test file system\n");
77 unregister_filesystem(&test_type);
78 return PTR_ERR(test_mnt);
79 }
80 return 0;
81}
82
83static void btrfs_destroy_test_fs(void)
84{
85 kern_unmount(test_mnt);
86 unregister_filesystem(&test_type);
87}
88
89struct btrfs_fs_info *btrfs_alloc_dummy_fs_info(u32 nodesize, u32 sectorsize)
90{
91 struct btrfs_fs_info *fs_info = kzalloc(sizeof(struct btrfs_fs_info),
92 GFP_KERNEL);
93
94 if (!fs_info)
95 return fs_info;
96 fs_info->fs_devices = kzalloc(sizeof(struct btrfs_fs_devices),
97 GFP_KERNEL);
98 if (!fs_info->fs_devices) {
99 kfree(fs_info);
100 return NULL;
101 }
102 fs_info->super_copy = kzalloc(sizeof(struct btrfs_super_block),
103 GFP_KERNEL);
104 if (!fs_info->super_copy) {
105 kfree(fs_info->fs_devices);
106 kfree(fs_info);
107 return NULL;
108 }
109
110 fs_info->nodesize = nodesize;
111 fs_info->sectorsize = sectorsize;
112
113 if (init_srcu_struct(&fs_info->subvol_srcu)) {
114 kfree(fs_info->fs_devices);
115 kfree(fs_info->super_copy);
116 kfree(fs_info);
117 return NULL;
118 }
119
120 spin_lock_init(&fs_info->buffer_lock);
121 spin_lock_init(&fs_info->qgroup_lock);
122 spin_lock_init(&fs_info->super_lock);
123 spin_lock_init(&fs_info->fs_roots_radix_lock);
124 spin_lock_init(&fs_info->tree_mod_seq_lock);
125 mutex_init(&fs_info->qgroup_ioctl_lock);
126 mutex_init(&fs_info->qgroup_rescan_lock);
127 rwlock_init(&fs_info->tree_mod_log_lock);
128 fs_info->running_transaction = NULL;
129 fs_info->qgroup_tree = RB_ROOT;
130 fs_info->qgroup_ulist = NULL;
131 atomic64_set(&fs_info->tree_mod_seq, 0);
132 INIT_LIST_HEAD(&fs_info->dirty_qgroups);
133 INIT_LIST_HEAD(&fs_info->dead_roots);
134 INIT_LIST_HEAD(&fs_info->tree_mod_seq_list);
135 INIT_RADIX_TREE(&fs_info->buffer_radix, GFP_ATOMIC);
136 INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC);
137 extent_io_tree_init(fs_info, &fs_info->freed_extents[0],
138 IO_TREE_FS_INFO_FREED_EXTENTS0, NULL);
139 extent_io_tree_init(fs_info, &fs_info->freed_extents[1],
140 IO_TREE_FS_INFO_FREED_EXTENTS1, NULL);
141 fs_info->pinned_extents = &fs_info->freed_extents[0];
142 set_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
143
144 test_mnt->mnt_sb->s_fs_info = fs_info;
145
146 return fs_info;
147}
148
149void btrfs_free_dummy_fs_info(struct btrfs_fs_info *fs_info)
150{
151 struct radix_tree_iter iter;
152 void **slot;
153
154 if (!fs_info)
155 return;
156
157 if (WARN_ON(!test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO,
158 &fs_info->fs_state)))
159 return;
160
161 test_mnt->mnt_sb->s_fs_info = NULL;
162
163 spin_lock(&fs_info->buffer_lock);
164 radix_tree_for_each_slot(slot, &fs_info->buffer_radix, &iter, 0) {
165 struct extent_buffer *eb;
166
167 eb = radix_tree_deref_slot_protected(slot, &fs_info->buffer_lock);
168 if (!eb)
169 continue;
170 /* Shouldn't happen but that kind of thinking creates CVE's */
171 if (radix_tree_exception(eb)) {
172 if (radix_tree_deref_retry(eb))
173 slot = radix_tree_iter_retry(&iter);
174 continue;
175 }
176 slot = radix_tree_iter_resume(slot, &iter);
177 spin_unlock(&fs_info->buffer_lock);
178 free_extent_buffer_stale(eb);
179 spin_lock(&fs_info->buffer_lock);
180 }
181 spin_unlock(&fs_info->buffer_lock);
182
183 btrfs_free_qgroup_config(fs_info);
184 btrfs_free_fs_roots(fs_info);
185 cleanup_srcu_struct(&fs_info->subvol_srcu);
186 kfree(fs_info->super_copy);
187 kfree(fs_info->fs_devices);
188 kfree(fs_info);
189}
190
191void btrfs_free_dummy_root(struct btrfs_root *root)
192{
193 if (!root)
194 return;
195 /* Will be freed by btrfs_free_fs_roots */
196 if (WARN_ON(test_bit(BTRFS_ROOT_IN_RADIX, &root->state)))
197 return;
198 if (root->node) {
199 /* One for allocate_extent_buffer */
200 free_extent_buffer(root->node);
201 }
202 kfree(root);
203}
204
205struct btrfs_block_group_cache *
206btrfs_alloc_dummy_block_group(struct btrfs_fs_info *fs_info,
207 unsigned long length)
208{
209 struct btrfs_block_group_cache *cache;
210
211 cache = kzalloc(sizeof(*cache), GFP_KERNEL);
212 if (!cache)
213 return NULL;
214 cache->free_space_ctl = kzalloc(sizeof(*cache->free_space_ctl),
215 GFP_KERNEL);
216 if (!cache->free_space_ctl) {
217 kfree(cache);
218 return NULL;
219 }
220
221 cache->key.objectid = 0;
222 cache->key.offset = length;
223 cache->key.type = BTRFS_BLOCK_GROUP_ITEM_KEY;
224 cache->full_stripe_len = fs_info->sectorsize;
225 cache->fs_info = fs_info;
226
227 INIT_LIST_HEAD(&cache->list);
228 INIT_LIST_HEAD(&cache->cluster_list);
229 INIT_LIST_HEAD(&cache->bg_list);
230 btrfs_init_free_space_ctl(cache);
231 mutex_init(&cache->free_space_lock);
232
233 return cache;
234}
235
236void btrfs_free_dummy_block_group(struct btrfs_block_group_cache *cache)
237{
238 if (!cache)
239 return;
240 __btrfs_remove_free_space_cache(cache->free_space_ctl);
241 kfree(cache->free_space_ctl);
242 kfree(cache);
243}
244
245void btrfs_init_dummy_trans(struct btrfs_trans_handle *trans,
246 struct btrfs_fs_info *fs_info)
247{
248 memset(trans, 0, sizeof(*trans));
249 trans->transid = 1;
250 trans->type = __TRANS_DUMMY;
251 trans->fs_info = fs_info;
252}
253
254int btrfs_run_sanity_tests(void)
255{
256 int ret, i;
257 u32 sectorsize, nodesize;
258 u32 test_sectorsize[] = {
259 PAGE_SIZE,
260 };
261 ret = btrfs_init_test_fs();
262 if (ret)
263 return ret;
264 for (i = 0; i < ARRAY_SIZE(test_sectorsize); i++) {
265 sectorsize = test_sectorsize[i];
266 for (nodesize = sectorsize;
267 nodesize <= BTRFS_MAX_METADATA_BLOCKSIZE;
268 nodesize <<= 1) {
269 pr_info("BTRFS: selftest: sectorsize: %u nodesize: %u\n",
270 sectorsize, nodesize);
271 ret = btrfs_test_free_space_cache(sectorsize, nodesize);
272 if (ret)
273 goto out;
274 ret = btrfs_test_extent_buffer_operations(sectorsize,
275 nodesize);
276 if (ret)
277 goto out;
278 ret = btrfs_test_extent_io(sectorsize, nodesize);
279 if (ret)
280 goto out;
281 ret = btrfs_test_inodes(sectorsize, nodesize);
282 if (ret)
283 goto out;
284 ret = btrfs_test_qgroups(sectorsize, nodesize);
285 if (ret)
286 goto out;
287 ret = btrfs_test_free_space_tree(sectorsize, nodesize);
288 if (ret)
289 goto out;
290 }
291 }
292 ret = btrfs_test_extent_map();
293
294out:
295 btrfs_destroy_test_fs();
296 return ret;
297}
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}