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 inode_init_owner(inode, NULL, S_IFREG); 60 61 return inode; 62 } 63 64 static 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 83 static void btrfs_destroy_test_fs(void) 84 { 85 kern_unmount(test_mnt); 86 unregister_filesystem(&test_type); 87 } 88 89 struct btrfs_device *btrfs_alloc_dummy_device(struct btrfs_fs_info *fs_info) 90 { 91 struct btrfs_device *dev; 92 93 dev = kzalloc(sizeof(*dev), GFP_KERNEL); 94 if (!dev) 95 return ERR_PTR(-ENOMEM); 96 97 extent_io_tree_init(NULL, &dev->alloc_state, 0, NULL); 98 INIT_LIST_HEAD(&dev->dev_list); 99 list_add(&dev->dev_list, &fs_info->fs_devices->devices); 100 101 return dev; 102 } 103 104 static void btrfs_free_dummy_device(struct btrfs_device *dev) 105 { 106 extent_io_tree_release(&dev->alloc_state); 107 kfree(dev); 108 } 109 110 struct btrfs_fs_info *btrfs_alloc_dummy_fs_info(u32 nodesize, u32 sectorsize) 111 { 112 struct btrfs_fs_info *fs_info = kzalloc(sizeof(struct btrfs_fs_info), 113 GFP_KERNEL); 114 115 if (!fs_info) 116 return fs_info; 117 fs_info->fs_devices = kzalloc(sizeof(struct btrfs_fs_devices), 118 GFP_KERNEL); 119 if (!fs_info->fs_devices) { 120 kfree(fs_info); 121 return NULL; 122 } 123 fs_info->super_copy = kzalloc(sizeof(struct btrfs_super_block), 124 GFP_KERNEL); 125 if (!fs_info->super_copy) { 126 kfree(fs_info->fs_devices); 127 kfree(fs_info); 128 return NULL; 129 } 130 131 fs_info->nodesize = nodesize; 132 fs_info->sectorsize = sectorsize; 133 134 if (init_srcu_struct(&fs_info->subvol_srcu)) { 135 kfree(fs_info->fs_devices); 136 kfree(fs_info->super_copy); 137 kfree(fs_info); 138 return NULL; 139 } 140 141 spin_lock_init(&fs_info->buffer_lock); 142 spin_lock_init(&fs_info->qgroup_lock); 143 spin_lock_init(&fs_info->super_lock); 144 spin_lock_init(&fs_info->fs_roots_radix_lock); 145 mutex_init(&fs_info->qgroup_ioctl_lock); 146 mutex_init(&fs_info->qgroup_rescan_lock); 147 rwlock_init(&fs_info->tree_mod_log_lock); 148 fs_info->running_transaction = NULL; 149 fs_info->qgroup_tree = RB_ROOT; 150 fs_info->qgroup_ulist = NULL; 151 atomic64_set(&fs_info->tree_mod_seq, 0); 152 INIT_LIST_HEAD(&fs_info->dirty_qgroups); 153 INIT_LIST_HEAD(&fs_info->dead_roots); 154 INIT_LIST_HEAD(&fs_info->tree_mod_seq_list); 155 INIT_LIST_HEAD(&fs_info->fs_devices->devices); 156 INIT_RADIX_TREE(&fs_info->buffer_radix, GFP_ATOMIC); 157 INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC); 158 extent_io_tree_init(fs_info, &fs_info->freed_extents[0], 159 IO_TREE_FS_INFO_FREED_EXTENTS0, NULL); 160 extent_io_tree_init(fs_info, &fs_info->freed_extents[1], 161 IO_TREE_FS_INFO_FREED_EXTENTS1, NULL); 162 extent_map_tree_init(&fs_info->mapping_tree); 163 fs_info->pinned_extents = &fs_info->freed_extents[0]; 164 set_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state); 165 166 test_mnt->mnt_sb->s_fs_info = fs_info; 167 168 return fs_info; 169 } 170 171 void btrfs_free_dummy_fs_info(struct btrfs_fs_info *fs_info) 172 { 173 struct radix_tree_iter iter; 174 void **slot; 175 struct btrfs_device *dev, *tmp; 176 177 if (!fs_info) 178 return; 179 180 if (WARN_ON(!test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, 181 &fs_info->fs_state))) 182 return; 183 184 test_mnt->mnt_sb->s_fs_info = NULL; 185 186 spin_lock(&fs_info->buffer_lock); 187 radix_tree_for_each_slot(slot, &fs_info->buffer_radix, &iter, 0) { 188 struct extent_buffer *eb; 189 190 eb = radix_tree_deref_slot_protected(slot, &fs_info->buffer_lock); 191 if (!eb) 192 continue; 193 /* Shouldn't happen but that kind of thinking creates CVE's */ 194 if (radix_tree_exception(eb)) { 195 if (radix_tree_deref_retry(eb)) 196 slot = radix_tree_iter_retry(&iter); 197 continue; 198 } 199 slot = radix_tree_iter_resume(slot, &iter); 200 spin_unlock(&fs_info->buffer_lock); 201 free_extent_buffer_stale(eb); 202 spin_lock(&fs_info->buffer_lock); 203 } 204 spin_unlock(&fs_info->buffer_lock); 205 206 btrfs_mapping_tree_free(&fs_info->mapping_tree); 207 list_for_each_entry_safe(dev, tmp, &fs_info->fs_devices->devices, 208 dev_list) { 209 btrfs_free_dummy_device(dev); 210 } 211 btrfs_free_qgroup_config(fs_info); 212 btrfs_free_fs_roots(fs_info); 213 cleanup_srcu_struct(&fs_info->subvol_srcu); 214 kfree(fs_info->super_copy); 215 kfree(fs_info->fs_devices); 216 kfree(fs_info); 217 } 218 219 void btrfs_free_dummy_root(struct btrfs_root *root) 220 { 221 if (!root) 222 return; 223 /* Will be freed by btrfs_free_fs_roots */ 224 if (WARN_ON(test_bit(BTRFS_ROOT_IN_RADIX, &root->state))) 225 return; 226 if (root->node) { 227 /* One for allocate_extent_buffer */ 228 free_extent_buffer(root->node); 229 } 230 kfree(root); 231 } 232 233 struct btrfs_block_group * 234 btrfs_alloc_dummy_block_group(struct btrfs_fs_info *fs_info, 235 unsigned long length) 236 { 237 struct btrfs_block_group *cache; 238 239 cache = kzalloc(sizeof(*cache), GFP_KERNEL); 240 if (!cache) 241 return NULL; 242 cache->free_space_ctl = kzalloc(sizeof(*cache->free_space_ctl), 243 GFP_KERNEL); 244 if (!cache->free_space_ctl) { 245 kfree(cache); 246 return NULL; 247 } 248 249 cache->start = 0; 250 cache->length = length; 251 cache->full_stripe_len = fs_info->sectorsize; 252 cache->fs_info = fs_info; 253 254 INIT_LIST_HEAD(&cache->list); 255 INIT_LIST_HEAD(&cache->cluster_list); 256 INIT_LIST_HEAD(&cache->bg_list); 257 btrfs_init_free_space_ctl(cache); 258 mutex_init(&cache->free_space_lock); 259 260 return cache; 261 } 262 263 void btrfs_free_dummy_block_group(struct btrfs_block_group *cache) 264 { 265 if (!cache) 266 return; 267 __btrfs_remove_free_space_cache(cache->free_space_ctl); 268 kfree(cache->free_space_ctl); 269 kfree(cache); 270 } 271 272 void btrfs_init_dummy_trans(struct btrfs_trans_handle *trans, 273 struct btrfs_fs_info *fs_info) 274 { 275 memset(trans, 0, sizeof(*trans)); 276 trans->transid = 1; 277 trans->type = __TRANS_DUMMY; 278 trans->fs_info = fs_info; 279 } 280 281 int btrfs_run_sanity_tests(void) 282 { 283 int ret, i; 284 u32 sectorsize, nodesize; 285 u32 test_sectorsize[] = { 286 PAGE_SIZE, 287 }; 288 ret = btrfs_init_test_fs(); 289 if (ret) 290 return ret; 291 for (i = 0; i < ARRAY_SIZE(test_sectorsize); i++) { 292 sectorsize = test_sectorsize[i]; 293 for (nodesize = sectorsize; 294 nodesize <= BTRFS_MAX_METADATA_BLOCKSIZE; 295 nodesize <<= 1) { 296 pr_info("BTRFS: selftest: sectorsize: %u nodesize: %u\n", 297 sectorsize, nodesize); 298 ret = btrfs_test_free_space_cache(sectorsize, nodesize); 299 if (ret) 300 goto out; 301 ret = btrfs_test_extent_buffer_operations(sectorsize, 302 nodesize); 303 if (ret) 304 goto out; 305 ret = btrfs_test_extent_io(sectorsize, nodesize); 306 if (ret) 307 goto out; 308 ret = btrfs_test_inodes(sectorsize, nodesize); 309 if (ret) 310 goto out; 311 ret = btrfs_test_qgroups(sectorsize, nodesize); 312 if (ret) 313 goto out; 314 ret = btrfs_test_free_space_tree(sectorsize, nodesize); 315 if (ret) 316 goto out; 317 } 318 } 319 ret = btrfs_test_extent_map(); 320 321 out: 322 btrfs_destroy_test_fs(); 323 return ret; 324 } 325