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 20 static struct vfsmount *test_mnt = NULL; 21 22 const 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 32 static const struct super_operations btrfs_test_super_ops = { 33 .alloc_inode = btrfs_alloc_inode, 34 .destroy_inode = btrfs_test_destroy_inode, 35 }; 36 37 38 static 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 47 static 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 53 struct 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 inode->i_ino = BTRFS_FIRST_FREE_OBJECTID; 63 BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY; 64 BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID; 65 BTRFS_I(inode)->location.offset = 0; 66 inode_init_owner(&init_user_ns, inode, NULL, S_IFREG); 67 68 return inode; 69 } 70 71 static 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 90 static void btrfs_destroy_test_fs(void) 91 { 92 kern_unmount(test_mnt); 93 unregister_filesystem(&test_type); 94 } 95 96 struct 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(NULL, &dev->alloc_state, 0, NULL); 105 INIT_LIST_HEAD(&dev->dev_list); 106 list_add(&dev->dev_list, &fs_info->fs_devices->devices); 107 108 return dev; 109 } 110 111 static void btrfs_free_dummy_device(struct btrfs_device *dev) 112 { 113 extent_io_tree_release(&dev->alloc_state); 114 kfree(dev); 115 } 116 117 struct 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 } 151 152 void 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(!test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, 162 &fs_info->fs_state))) 163 return; 164 165 test_mnt->mnt_sb->s_fs_info = NULL; 166 167 spin_lock(&fs_info->buffer_lock); 168 radix_tree_for_each_slot(slot, &fs_info->buffer_radix, &iter, 0) { 169 struct extent_buffer *eb; 170 171 eb = radix_tree_deref_slot_protected(slot, &fs_info->buffer_lock); 172 if (!eb) 173 continue; 174 /* Shouldn't happen but that kind of thinking creates CVE's */ 175 if (radix_tree_exception(eb)) { 176 if (radix_tree_deref_retry(eb)) 177 slot = radix_tree_iter_retry(&iter); 178 continue; 179 } 180 slot = radix_tree_iter_resume(slot, &iter); 181 spin_unlock(&fs_info->buffer_lock); 182 free_extent_buffer_stale(eb); 183 spin_lock(&fs_info->buffer_lock); 184 } 185 spin_unlock(&fs_info->buffer_lock); 186 187 btrfs_mapping_tree_free(&fs_info->mapping_tree); 188 list_for_each_entry_safe(dev, tmp, &fs_info->fs_devices->devices, 189 dev_list) { 190 btrfs_free_dummy_device(dev); 191 } 192 btrfs_free_qgroup_config(fs_info); 193 btrfs_free_fs_roots(fs_info); 194 kfree(fs_info->super_copy); 195 btrfs_check_leaked_roots(fs_info); 196 btrfs_extent_buffer_leak_debug_check(fs_info); 197 kfree(fs_info->fs_devices); 198 kfree(fs_info); 199 } 200 201 void btrfs_free_dummy_root(struct btrfs_root *root) 202 { 203 if (!root) 204 return; 205 /* Will be freed by btrfs_free_fs_roots */ 206 if (WARN_ON(test_bit(BTRFS_ROOT_IN_RADIX, &root->state))) 207 return; 208 btrfs_global_root_delete(root); 209 btrfs_put_root(root); 210 } 211 212 struct btrfs_block_group * 213 btrfs_alloc_dummy_block_group(struct btrfs_fs_info *fs_info, 214 unsigned long length) 215 { 216 struct btrfs_block_group *cache; 217 218 cache = kzalloc(sizeof(*cache), GFP_KERNEL); 219 if (!cache) 220 return NULL; 221 cache->free_space_ctl = kzalloc(sizeof(*cache->free_space_ctl), 222 GFP_KERNEL); 223 if (!cache->free_space_ctl) { 224 kfree(cache); 225 return NULL; 226 } 227 228 cache->start = 0; 229 cache->length = length; 230 cache->full_stripe_len = fs_info->sectorsize; 231 cache->fs_info = fs_info; 232 233 INIT_LIST_HEAD(&cache->list); 234 INIT_LIST_HEAD(&cache->cluster_list); 235 INIT_LIST_HEAD(&cache->bg_list); 236 btrfs_init_free_space_ctl(cache, cache->free_space_ctl); 237 mutex_init(&cache->free_space_lock); 238 239 return cache; 240 } 241 242 void btrfs_free_dummy_block_group(struct btrfs_block_group *cache) 243 { 244 if (!cache) 245 return; 246 btrfs_remove_free_space_cache(cache); 247 kfree(cache->free_space_ctl); 248 kfree(cache); 249 } 250 251 void btrfs_init_dummy_trans(struct btrfs_trans_handle *trans, 252 struct btrfs_fs_info *fs_info) 253 { 254 memset(trans, 0, sizeof(*trans)); 255 trans->transid = 1; 256 trans->type = __TRANS_DUMMY; 257 trans->fs_info = fs_info; 258 } 259 260 int btrfs_run_sanity_tests(void) 261 { 262 int ret, i; 263 u32 sectorsize, nodesize; 264 u32 test_sectorsize[] = { 265 PAGE_SIZE, 266 }; 267 ret = btrfs_init_test_fs(); 268 if (ret) 269 return ret; 270 for (i = 0; i < ARRAY_SIZE(test_sectorsize); i++) { 271 sectorsize = test_sectorsize[i]; 272 for (nodesize = sectorsize; 273 nodesize <= BTRFS_MAX_METADATA_BLOCKSIZE; 274 nodesize <<= 1) { 275 pr_info("BTRFS: selftest: sectorsize: %u nodesize: %u\n", 276 sectorsize, nodesize); 277 ret = btrfs_test_free_space_cache(sectorsize, nodesize); 278 if (ret) 279 goto out; 280 ret = btrfs_test_extent_buffer_operations(sectorsize, 281 nodesize); 282 if (ret) 283 goto out; 284 ret = btrfs_test_extent_io(sectorsize, nodesize); 285 if (ret) 286 goto out; 287 ret = btrfs_test_inodes(sectorsize, nodesize); 288 if (ret) 289 goto out; 290 ret = btrfs_test_qgroups(sectorsize, nodesize); 291 if (ret) 292 goto out; 293 ret = btrfs_test_free_space_tree(sectorsize, nodesize); 294 if (ret) 295 goto out; 296 } 297 } 298 ret = btrfs_test_extent_map(); 299 300 out: 301 btrfs_destroy_test_fs(); 302 return ret; 303 } 304