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 21 static struct vfsmount *test_mnt = NULL; 22 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", 31 }; 32 33 static const struct super_operations btrfs_test_super_ops = { 34 .alloc_inode = btrfs_alloc_inode, 35 .destroy_inode = btrfs_test_destroy_inode, 36 }; 37 38 39 static int btrfs_test_init_fs_context(struct fs_context *fc) 40 { 41 struct pseudo_fs_context *ctx = init_pseudo(fc, BTRFS_TEST_MAGIC); 42 if (!ctx) 43 return -ENOMEM; 44 ctx->ops = &btrfs_test_super_ops; 45 return 0; 46 } 47 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, 52 }; 53 54 struct inode *btrfs_new_test_inode(void) 55 { 56 struct inode *inode; 57 58 inode = new_inode(test_mnt->mnt_sb); 59 if (!inode) 60 return NULL; 61 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(&init_user_ns, inode, NULL, S_IFREG); 68 69 return inode; 70 } 71 72 static int btrfs_init_test_fs(void) 73 { 74 int ret; 75 76 ret = register_filesystem(&test_type); 77 if (ret) { 78 printk(KERN_ERR "btrfs: cannot register test file system\n"); 79 return ret; 80 } 81 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); 87 } 88 return 0; 89 } 90 91 static void btrfs_destroy_test_fs(void) 92 { 93 kern_unmount(test_mnt); 94 unregister_filesystem(&test_type); 95 } 96 97 struct btrfs_device *btrfs_alloc_dummy_device(struct btrfs_fs_info *fs_info) 98 { 99 struct btrfs_device *dev; 100 101 dev = kzalloc(sizeof(*dev), GFP_KERNEL); 102 if (!dev) 103 return ERR_PTR(-ENOMEM); 104 105 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); 108 109 return dev; 110 } 111 112 static void btrfs_free_dummy_device(struct btrfs_device *dev) 113 { 114 extent_io_tree_release(&dev->alloc_state); 115 kfree(dev); 116 } 117 118 struct btrfs_fs_info *btrfs_alloc_dummy_fs_info(u32 nodesize, u32 sectorsize) 119 { 120 struct btrfs_fs_info *fs_info = kzalloc(sizeof(struct btrfs_fs_info), 121 GFP_KERNEL); 122 123 if (!fs_info) 124 return fs_info; 125 fs_info->fs_devices = kzalloc(sizeof(struct btrfs_fs_devices), 126 GFP_KERNEL); 127 if (!fs_info->fs_devices) { 128 kfree(fs_info); 129 return NULL; 130 } 131 INIT_LIST_HEAD(&fs_info->fs_devices->devices); 132 133 fs_info->super_copy = kzalloc(sizeof(struct btrfs_super_block), 134 GFP_KERNEL); 135 if (!fs_info->super_copy) { 136 kfree(fs_info->fs_devices); 137 kfree(fs_info); 138 return NULL; 139 } 140 141 btrfs_init_fs_info(fs_info); 142 143 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); 147 148 test_mnt->mnt_sb->s_fs_info = fs_info; 149 150 return fs_info; 151 } 152 153 void btrfs_free_dummy_fs_info(struct btrfs_fs_info *fs_info) 154 { 155 struct radix_tree_iter iter; 156 void **slot; 157 struct btrfs_device *dev, *tmp; 158 159 if (!fs_info) 160 return; 161 162 if (WARN_ON(!test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, 163 &fs_info->fs_state))) 164 return; 165 166 test_mnt->mnt_sb->s_fs_info = NULL; 167 168 spin_lock(&fs_info->buffer_lock); 169 radix_tree_for_each_slot(slot, &fs_info->buffer_radix, &iter, 0) { 170 struct extent_buffer *eb; 171 172 eb = radix_tree_deref_slot_protected(slot, &fs_info->buffer_lock); 173 if (!eb) 174 continue; 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); 179 continue; 180 } 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); 185 } 186 spin_unlock(&fs_info->buffer_lock); 187 188 btrfs_mapping_tree_free(&fs_info->mapping_tree); 189 list_for_each_entry_safe(dev, tmp, &fs_info->fs_devices->devices, 190 dev_list) { 191 btrfs_free_dummy_device(dev); 192 } 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); 199 kfree(fs_info); 200 } 201 202 void btrfs_free_dummy_root(struct btrfs_root *root) 203 { 204 if (IS_ERR_OR_NULL(root)) 205 return; 206 /* Will be freed by btrfs_free_fs_roots */ 207 if (WARN_ON(test_bit(BTRFS_ROOT_IN_RADIX, &root->state))) 208 return; 209 btrfs_global_root_delete(root); 210 btrfs_put_root(root); 211 } 212 213 struct btrfs_block_group * 214 btrfs_alloc_dummy_block_group(struct btrfs_fs_info *fs_info, 215 unsigned long length) 216 { 217 struct btrfs_block_group *cache; 218 219 cache = kzalloc(sizeof(*cache), GFP_KERNEL); 220 if (!cache) 221 return NULL; 222 cache->free_space_ctl = kzalloc(sizeof(*cache->free_space_ctl), 223 GFP_KERNEL); 224 if (!cache->free_space_ctl) { 225 kfree(cache); 226 return NULL; 227 } 228 229 cache->start = 0; 230 cache->length = length; 231 cache->full_stripe_len = fs_info->sectorsize; 232 cache->fs_info = fs_info; 233 234 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); 239 240 return cache; 241 } 242 243 void btrfs_free_dummy_block_group(struct btrfs_block_group *cache) 244 { 245 if (!cache) 246 return; 247 btrfs_remove_free_space_cache(cache); 248 kfree(cache->free_space_ctl); 249 kfree(cache); 250 } 251 252 void btrfs_init_dummy_trans(struct btrfs_trans_handle *trans, 253 struct btrfs_fs_info *fs_info) 254 { 255 memset(trans, 0, sizeof(*trans)); 256 trans->transid = 1; 257 trans->type = __TRANS_DUMMY; 258 trans->fs_info = fs_info; 259 } 260 261 int btrfs_run_sanity_tests(void) 262 { 263 int ret, i; 264 u32 sectorsize, nodesize; 265 u32 test_sectorsize[] = { 266 PAGE_SIZE, 267 }; 268 ret = btrfs_init_test_fs(); 269 if (ret) 270 return ret; 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; 275 nodesize <<= 1) { 276 pr_info("BTRFS: selftest: sectorsize: %u nodesize: %u\n", 277 sectorsize, nodesize); 278 ret = btrfs_test_free_space_cache(sectorsize, nodesize); 279 if (ret) 280 goto out; 281 ret = btrfs_test_extent_buffer_operations(sectorsize, 282 nodesize); 283 if (ret) 284 goto out; 285 ret = btrfs_test_extent_io(sectorsize, nodesize); 286 if (ret) 287 goto out; 288 ret = btrfs_test_inodes(sectorsize, nodesize); 289 if (ret) 290 goto out; 291 ret = btrfs_test_qgroups(sectorsize, nodesize); 292 if (ret) 293 goto out; 294 ret = btrfs_test_free_space_tree(sectorsize, nodesize); 295 if (ret) 296 goto out; 297 } 298 } 299 ret = btrfs_test_extent_map(); 300 301 out: 302 btrfs_destroy_test_fs(); 303 return ret; 304 } 305