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 [TEST_ALLOC_CHUNK_MAP] = "cannot allocate chunk map", 32 [TEST_ALLOC_IO_CONTEXT] = "cannot allocate io context", 33 [TEST_ALLOC_TRANSACTION] = "cannot allocate transaction", 34 }; 35 36 static const struct super_operations btrfs_test_super_ops = { 37 .alloc_inode = btrfs_alloc_inode, 38 .destroy_inode = btrfs_test_destroy_inode, 39 }; 40 41 42 static int btrfs_test_init_fs_context(struct fs_context *fc) 43 { 44 struct pseudo_fs_context *ctx = init_pseudo(fc, BTRFS_TEST_MAGIC); 45 if (!ctx) 46 return -ENOMEM; 47 ctx->ops = &btrfs_test_super_ops; 48 return 0; 49 } 50 51 static struct file_system_type test_type = { 52 .name = "btrfs_test_fs", 53 .init_fs_context = btrfs_test_init_fs_context, 54 .kill_sb = kill_anon_super, 55 }; 56 57 struct inode *btrfs_new_test_inode(void) 58 { 59 struct inode *inode; 60 61 inode = new_inode(test_mnt->mnt_sb); 62 if (!inode) 63 return NULL; 64 65 inode->i_mode = S_IFREG; 66 btrfs_set_inode_number(BTRFS_I(inode), BTRFS_FIRST_FREE_OBJECTID); 67 inode_init_owner(&nop_mnt_idmap, 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_obj(*dev); 102 if (!dev) 103 return ERR_PTR(-ENOMEM); 104 105 btrfs_extent_io_tree_init(fs_info, &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 btrfs_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_obj(struct btrfs_fs_info); 121 122 if (!fs_info) 123 return fs_info; 124 fs_info->fs_devices = kzalloc_obj(struct btrfs_fs_devices); 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_obj(struct btrfs_super_block); 132 if (!fs_info->super_copy) { 133 kfree(fs_info->fs_devices); 134 kfree(fs_info); 135 return NULL; 136 } 137 138 btrfs_init_fs_info(fs_info); 139 140 fs_info->nodesize = nodesize; 141 fs_info->sectorsize = sectorsize; 142 fs_info->sectorsize_bits = ilog2(sectorsize); 143 144 /* CRC32C csum size. */ 145 fs_info->csum_size = 4; 146 fs_info->csums_per_leaf = BTRFS_MAX_ITEM_SIZE(fs_info) / 147 fs_info->csum_size; 148 set_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state); 149 150 test_mnt->mnt_sb->s_fs_info = fs_info; 151 152 return fs_info; 153 } 154 155 void btrfs_free_dummy_fs_info(struct btrfs_fs_info *fs_info) 156 { 157 struct btrfs_device *dev, *tmp; 158 struct extent_buffer *eb; 159 unsigned long index; 160 161 if (!fs_info) 162 return; 163 164 if (WARN_ON(!btrfs_is_testing(fs_info))) 165 return; 166 167 test_mnt->mnt_sb->s_fs_info = NULL; 168 169 xa_lock_irq(&fs_info->buffer_tree); 170 xa_for_each(&fs_info->buffer_tree, index, eb) { 171 xa_unlock_irq(&fs_info->buffer_tree); 172 free_extent_buffer(eb); 173 xa_lock_irq(&fs_info->buffer_tree); 174 } 175 xa_unlock_irq(&fs_info->buffer_tree); 176 177 btrfs_mapping_tree_free(fs_info); 178 list_for_each_entry_safe(dev, tmp, &fs_info->fs_devices->devices, 179 dev_list) { 180 btrfs_free_dummy_device(dev); 181 } 182 btrfs_free_qgroup_config(fs_info); 183 btrfs_free_fs_roots(fs_info); 184 kfree(fs_info->super_copy); 185 btrfs_check_leaked_roots(fs_info); 186 btrfs_extent_buffer_leak_debug_check(fs_info); 187 kfree(fs_info->fs_devices); 188 kfree(fs_info); 189 } 190 191 void btrfs_free_dummy_root(struct btrfs_root *root) 192 { 193 if (IS_ERR_OR_NULL(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 btrfs_global_root_delete(root); 199 btrfs_put_root(root); 200 } 201 202 struct btrfs_block_group * 203 btrfs_alloc_dummy_block_group(struct btrfs_fs_info *fs_info, 204 unsigned long length) 205 { 206 struct btrfs_block_group *cache; 207 208 cache = kzalloc_obj(*cache); 209 if (!cache) 210 return NULL; 211 cache->free_space_ctl = kzalloc_obj(*cache->free_space_ctl); 212 if (!cache->free_space_ctl) { 213 kfree(cache); 214 return NULL; 215 } 216 217 cache->start = 0; 218 cache->length = length; 219 cache->full_stripe_len = fs_info->sectorsize; 220 cache->fs_info = fs_info; 221 222 INIT_LIST_HEAD(&cache->list); 223 INIT_LIST_HEAD(&cache->cluster_list); 224 INIT_LIST_HEAD(&cache->bg_list); 225 btrfs_init_free_space_ctl(cache, cache->free_space_ctl); 226 mutex_init(&cache->free_space_lock); 227 228 return cache; 229 } 230 231 void btrfs_free_dummy_block_group(struct btrfs_block_group *cache) 232 { 233 if (!cache) 234 return; 235 btrfs_remove_free_space_cache(cache); 236 kfree(cache->free_space_ctl); 237 kfree(cache); 238 } 239 240 void btrfs_init_dummy_transaction(struct btrfs_transaction *trans, struct btrfs_fs_info *fs_info) 241 { 242 memset(trans, 0, sizeof(*trans)); 243 trans->fs_info = fs_info; 244 xa_init(&trans->delayed_refs.head_refs); 245 xa_init(&trans->delayed_refs.dirty_extents); 246 spin_lock_init(&trans->delayed_refs.lock); 247 } 248 249 void 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 } 257 258 int 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 ret = btrfs_test_raid_stripe_tree(sectorsize, nodesize); 295 if (ret) 296 goto out; 297 ret = btrfs_test_delayed_refs(sectorsize, nodesize); 298 if (ret) 299 goto out; 300 ret = btrfs_test_chunk_allocation(sectorsize, nodesize); 301 if (ret) 302 goto out; 303 } 304 } 305 ret = btrfs_test_extent_map(); 306 307 out: 308 btrfs_destroy_test_fs(); 309 return ret; 310 } 311