1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 2007 Oracle. All rights reserved. 4 */ 5 6 #include "ctree.h" 7 #include "disk-io.h" 8 #include "print-tree.h" 9 10 struct root_name_map { 11 u64 id; 12 char name[16]; 13 }; 14 15 static const struct root_name_map root_map[] = { 16 { BTRFS_ROOT_TREE_OBJECTID, "ROOT_TREE" }, 17 { BTRFS_EXTENT_TREE_OBJECTID, "EXTENT_TREE" }, 18 { BTRFS_CHUNK_TREE_OBJECTID, "CHUNK_TREE" }, 19 { BTRFS_DEV_TREE_OBJECTID, "DEV_TREE" }, 20 { BTRFS_FS_TREE_OBJECTID, "FS_TREE" }, 21 { BTRFS_CSUM_TREE_OBJECTID, "CSUM_TREE" }, 22 { BTRFS_TREE_LOG_OBJECTID, "TREE_LOG" }, 23 { BTRFS_QUOTA_TREE_OBJECTID, "QUOTA_TREE" }, 24 { BTRFS_UUID_TREE_OBJECTID, "UUID_TREE" }, 25 { BTRFS_FREE_SPACE_TREE_OBJECTID, "FREE_SPACE_TREE" }, 26 { BTRFS_BLOCK_GROUP_TREE_OBJECTID, "BLOCK_GROUP_TREE" }, 27 { BTRFS_DATA_RELOC_TREE_OBJECTID, "DATA_RELOC_TREE" }, 28 }; 29 30 const char *btrfs_root_name(const struct btrfs_key *key, char *buf) 31 { 32 int i; 33 34 if (key->objectid == BTRFS_TREE_RELOC_OBJECTID) { 35 snprintf(buf, BTRFS_ROOT_NAME_BUF_LEN, 36 "TREE_RELOC offset=%llu", key->offset); 37 return buf; 38 } 39 40 for (i = 0; i < ARRAY_SIZE(root_map); i++) { 41 if (root_map[i].id == key->objectid) 42 return root_map[i].name; 43 } 44 45 snprintf(buf, BTRFS_ROOT_NAME_BUF_LEN, "%llu", key->objectid); 46 return buf; 47 } 48 49 static void print_chunk(struct extent_buffer *eb, struct btrfs_chunk *chunk) 50 { 51 int num_stripes = btrfs_chunk_num_stripes(eb, chunk); 52 int i; 53 pr_info("\t\tchunk length %llu owner %llu type %llu num_stripes %d\n", 54 btrfs_chunk_length(eb, chunk), btrfs_chunk_owner(eb, chunk), 55 btrfs_chunk_type(eb, chunk), num_stripes); 56 for (i = 0 ; i < num_stripes ; i++) { 57 pr_info("\t\t\tstripe %d devid %llu offset %llu\n", i, 58 btrfs_stripe_devid_nr(eb, chunk, i), 59 btrfs_stripe_offset_nr(eb, chunk, i)); 60 } 61 } 62 static void print_dev_item(struct extent_buffer *eb, 63 struct btrfs_dev_item *dev_item) 64 { 65 pr_info("\t\tdev item devid %llu total_bytes %llu bytes used %llu\n", 66 btrfs_device_id(eb, dev_item), 67 btrfs_device_total_bytes(eb, dev_item), 68 btrfs_device_bytes_used(eb, dev_item)); 69 } 70 static void print_extent_data_ref(struct extent_buffer *eb, 71 struct btrfs_extent_data_ref *ref) 72 { 73 pr_cont("extent data backref root %llu objectid %llu offset %llu count %u\n", 74 btrfs_extent_data_ref_root(eb, ref), 75 btrfs_extent_data_ref_objectid(eb, ref), 76 btrfs_extent_data_ref_offset(eb, ref), 77 btrfs_extent_data_ref_count(eb, ref)); 78 } 79 80 static void print_extent_item(struct extent_buffer *eb, int slot, int type) 81 { 82 struct btrfs_extent_item *ei; 83 struct btrfs_extent_inline_ref *iref; 84 struct btrfs_extent_data_ref *dref; 85 struct btrfs_shared_data_ref *sref; 86 struct btrfs_disk_key key; 87 unsigned long end; 88 unsigned long ptr; 89 u32 item_size = btrfs_item_size(eb, slot); 90 u64 flags; 91 u64 offset; 92 int ref_index = 0; 93 94 if (unlikely(item_size < sizeof(*ei))) { 95 btrfs_print_v0_err(eb->fs_info); 96 btrfs_handle_fs_error(eb->fs_info, -EINVAL, NULL); 97 } 98 99 ei = btrfs_item_ptr(eb, slot, struct btrfs_extent_item); 100 flags = btrfs_extent_flags(eb, ei); 101 102 pr_info("\t\textent refs %llu gen %llu flags %llu\n", 103 btrfs_extent_refs(eb, ei), btrfs_extent_generation(eb, ei), 104 flags); 105 106 if ((type == BTRFS_EXTENT_ITEM_KEY) && 107 flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) { 108 struct btrfs_tree_block_info *info; 109 info = (struct btrfs_tree_block_info *)(ei + 1); 110 btrfs_tree_block_key(eb, info, &key); 111 pr_info("\t\ttree block key (%llu %u %llu) level %d\n", 112 btrfs_disk_key_objectid(&key), key.type, 113 btrfs_disk_key_offset(&key), 114 btrfs_tree_block_level(eb, info)); 115 iref = (struct btrfs_extent_inline_ref *)(info + 1); 116 } else { 117 iref = (struct btrfs_extent_inline_ref *)(ei + 1); 118 } 119 120 ptr = (unsigned long)iref; 121 end = (unsigned long)ei + item_size; 122 while (ptr < end) { 123 iref = (struct btrfs_extent_inline_ref *)ptr; 124 type = btrfs_extent_inline_ref_type(eb, iref); 125 offset = btrfs_extent_inline_ref_offset(eb, iref); 126 pr_info("\t\tref#%d: ", ref_index++); 127 switch (type) { 128 case BTRFS_TREE_BLOCK_REF_KEY: 129 pr_cont("tree block backref root %llu\n", offset); 130 break; 131 case BTRFS_SHARED_BLOCK_REF_KEY: 132 pr_cont("shared block backref parent %llu\n", offset); 133 /* 134 * offset is supposed to be a tree block which 135 * must be aligned to nodesize. 136 */ 137 if (!IS_ALIGNED(offset, eb->fs_info->sectorsize)) 138 pr_info( 139 "\t\t\t(parent %llu not aligned to sectorsize %u)\n", 140 offset, eb->fs_info->sectorsize); 141 break; 142 case BTRFS_EXTENT_DATA_REF_KEY: 143 dref = (struct btrfs_extent_data_ref *)(&iref->offset); 144 print_extent_data_ref(eb, dref); 145 break; 146 case BTRFS_SHARED_DATA_REF_KEY: 147 sref = (struct btrfs_shared_data_ref *)(iref + 1); 148 pr_cont("shared data backref parent %llu count %u\n", 149 offset, btrfs_shared_data_ref_count(eb, sref)); 150 /* 151 * offset is supposed to be a tree block which 152 * must be aligned to nodesize. 153 */ 154 if (!IS_ALIGNED(offset, eb->fs_info->nodesize)) 155 pr_info( 156 "\t\t\t(parent %llu not aligned to sectorsize %u)\n", 157 offset, eb->fs_info->sectorsize); 158 break; 159 default: 160 pr_cont("(extent %llu has INVALID ref type %d)\n", 161 eb->start, type); 162 return; 163 } 164 ptr += btrfs_extent_inline_ref_size(type); 165 } 166 WARN_ON(ptr > end); 167 } 168 169 static void print_uuid_item(struct extent_buffer *l, unsigned long offset, 170 u32 item_size) 171 { 172 if (!IS_ALIGNED(item_size, sizeof(u64))) { 173 pr_warn("BTRFS: uuid item with illegal size %lu!\n", 174 (unsigned long)item_size); 175 return; 176 } 177 while (item_size) { 178 __le64 subvol_id; 179 180 read_extent_buffer(l, &subvol_id, offset, sizeof(subvol_id)); 181 pr_info("\t\tsubvol_id %llu\n", le64_to_cpu(subvol_id)); 182 item_size -= sizeof(u64); 183 offset += sizeof(u64); 184 } 185 } 186 187 /* 188 * Helper to output refs and locking status of extent buffer. Useful to debug 189 * race condition related problems. 190 */ 191 static void print_eb_refs_lock(struct extent_buffer *eb) 192 { 193 #ifdef CONFIG_BTRFS_DEBUG 194 btrfs_info(eb->fs_info, "refs %u lock_owner %u current %u", 195 atomic_read(&eb->refs), eb->lock_owner, current->pid); 196 #endif 197 } 198 199 void btrfs_print_leaf(struct extent_buffer *l) 200 { 201 struct btrfs_fs_info *fs_info; 202 int i; 203 u32 type, nr; 204 struct btrfs_root_item *ri; 205 struct btrfs_dir_item *di; 206 struct btrfs_inode_item *ii; 207 struct btrfs_block_group_item *bi; 208 struct btrfs_file_extent_item *fi; 209 struct btrfs_extent_data_ref *dref; 210 struct btrfs_shared_data_ref *sref; 211 struct btrfs_dev_extent *dev_extent; 212 struct btrfs_key key; 213 struct btrfs_key found_key; 214 215 if (!l) 216 return; 217 218 fs_info = l->fs_info; 219 nr = btrfs_header_nritems(l); 220 221 btrfs_info(fs_info, 222 "leaf %llu gen %llu total ptrs %d free space %d owner %llu", 223 btrfs_header_bytenr(l), btrfs_header_generation(l), nr, 224 btrfs_leaf_free_space(l), btrfs_header_owner(l)); 225 print_eb_refs_lock(l); 226 for (i = 0 ; i < nr ; i++) { 227 btrfs_item_key_to_cpu(l, &key, i); 228 type = key.type; 229 pr_info("\titem %d key (%llu %u %llu) itemoff %d itemsize %d\n", 230 i, key.objectid, type, key.offset, 231 btrfs_item_offset(l, i), btrfs_item_size(l, i)); 232 switch (type) { 233 case BTRFS_INODE_ITEM_KEY: 234 ii = btrfs_item_ptr(l, i, struct btrfs_inode_item); 235 pr_info("\t\tinode generation %llu size %llu mode %o\n", 236 btrfs_inode_generation(l, ii), 237 btrfs_inode_size(l, ii), 238 btrfs_inode_mode(l, ii)); 239 break; 240 case BTRFS_DIR_ITEM_KEY: 241 di = btrfs_item_ptr(l, i, struct btrfs_dir_item); 242 btrfs_dir_item_key_to_cpu(l, di, &found_key); 243 pr_info("\t\tdir oid %llu type %u\n", 244 found_key.objectid, 245 btrfs_dir_type(l, di)); 246 break; 247 case BTRFS_ROOT_ITEM_KEY: 248 ri = btrfs_item_ptr(l, i, struct btrfs_root_item); 249 pr_info("\t\troot data bytenr %llu refs %u\n", 250 btrfs_disk_root_bytenr(l, ri), 251 btrfs_disk_root_refs(l, ri)); 252 break; 253 case BTRFS_EXTENT_ITEM_KEY: 254 case BTRFS_METADATA_ITEM_KEY: 255 print_extent_item(l, i, type); 256 break; 257 case BTRFS_TREE_BLOCK_REF_KEY: 258 pr_info("\t\ttree block backref\n"); 259 break; 260 case BTRFS_SHARED_BLOCK_REF_KEY: 261 pr_info("\t\tshared block backref\n"); 262 break; 263 case BTRFS_EXTENT_DATA_REF_KEY: 264 dref = btrfs_item_ptr(l, i, 265 struct btrfs_extent_data_ref); 266 print_extent_data_ref(l, dref); 267 break; 268 case BTRFS_SHARED_DATA_REF_KEY: 269 sref = btrfs_item_ptr(l, i, 270 struct btrfs_shared_data_ref); 271 pr_info("\t\tshared data backref count %u\n", 272 btrfs_shared_data_ref_count(l, sref)); 273 break; 274 case BTRFS_EXTENT_DATA_KEY: 275 fi = btrfs_item_ptr(l, i, 276 struct btrfs_file_extent_item); 277 if (btrfs_file_extent_type(l, fi) == 278 BTRFS_FILE_EXTENT_INLINE) { 279 pr_info("\t\tinline extent data size %llu\n", 280 btrfs_file_extent_ram_bytes(l, fi)); 281 break; 282 } 283 pr_info("\t\textent data disk bytenr %llu nr %llu\n", 284 btrfs_file_extent_disk_bytenr(l, fi), 285 btrfs_file_extent_disk_num_bytes(l, fi)); 286 pr_info("\t\textent data offset %llu nr %llu ram %llu\n", 287 btrfs_file_extent_offset(l, fi), 288 btrfs_file_extent_num_bytes(l, fi), 289 btrfs_file_extent_ram_bytes(l, fi)); 290 break; 291 case BTRFS_EXTENT_REF_V0_KEY: 292 btrfs_print_v0_err(fs_info); 293 btrfs_handle_fs_error(fs_info, -EINVAL, NULL); 294 break; 295 case BTRFS_BLOCK_GROUP_ITEM_KEY: 296 bi = btrfs_item_ptr(l, i, 297 struct btrfs_block_group_item); 298 pr_info( 299 "\t\tblock group used %llu chunk_objectid %llu flags %llu\n", 300 btrfs_block_group_used(l, bi), 301 btrfs_block_group_chunk_objectid(l, bi), 302 btrfs_block_group_flags(l, bi)); 303 break; 304 case BTRFS_CHUNK_ITEM_KEY: 305 print_chunk(l, btrfs_item_ptr(l, i, 306 struct btrfs_chunk)); 307 break; 308 case BTRFS_DEV_ITEM_KEY: 309 print_dev_item(l, btrfs_item_ptr(l, i, 310 struct btrfs_dev_item)); 311 break; 312 case BTRFS_DEV_EXTENT_KEY: 313 dev_extent = btrfs_item_ptr(l, i, 314 struct btrfs_dev_extent); 315 pr_info("\t\tdev extent chunk_tree %llu\n\t\tchunk objectid %llu chunk offset %llu length %llu\n", 316 btrfs_dev_extent_chunk_tree(l, dev_extent), 317 btrfs_dev_extent_chunk_objectid(l, dev_extent), 318 btrfs_dev_extent_chunk_offset(l, dev_extent), 319 btrfs_dev_extent_length(l, dev_extent)); 320 break; 321 case BTRFS_PERSISTENT_ITEM_KEY: 322 pr_info("\t\tpersistent item objectid %llu offset %llu\n", 323 key.objectid, key.offset); 324 switch (key.objectid) { 325 case BTRFS_DEV_STATS_OBJECTID: 326 pr_info("\t\tdevice stats\n"); 327 break; 328 default: 329 pr_info("\t\tunknown persistent item\n"); 330 } 331 break; 332 case BTRFS_TEMPORARY_ITEM_KEY: 333 pr_info("\t\ttemporary item objectid %llu offset %llu\n", 334 key.objectid, key.offset); 335 switch (key.objectid) { 336 case BTRFS_BALANCE_OBJECTID: 337 pr_info("\t\tbalance status\n"); 338 break; 339 default: 340 pr_info("\t\tunknown temporary item\n"); 341 } 342 break; 343 case BTRFS_DEV_REPLACE_KEY: 344 pr_info("\t\tdev replace\n"); 345 break; 346 case BTRFS_UUID_KEY_SUBVOL: 347 case BTRFS_UUID_KEY_RECEIVED_SUBVOL: 348 print_uuid_item(l, btrfs_item_ptr_offset(l, i), 349 btrfs_item_size(l, i)); 350 break; 351 } 352 } 353 } 354 355 void btrfs_print_tree(struct extent_buffer *c, bool follow) 356 { 357 struct btrfs_fs_info *fs_info; 358 int i; u32 nr; 359 struct btrfs_key key; 360 int level; 361 362 if (!c) 363 return; 364 fs_info = c->fs_info; 365 nr = btrfs_header_nritems(c); 366 level = btrfs_header_level(c); 367 if (level == 0) { 368 btrfs_print_leaf(c); 369 return; 370 } 371 btrfs_info(fs_info, 372 "node %llu level %d gen %llu total ptrs %d free spc %u owner %llu", 373 btrfs_header_bytenr(c), level, btrfs_header_generation(c), 374 nr, (u32)BTRFS_NODEPTRS_PER_BLOCK(fs_info) - nr, 375 btrfs_header_owner(c)); 376 print_eb_refs_lock(c); 377 for (i = 0; i < nr; i++) { 378 btrfs_node_key_to_cpu(c, &key, i); 379 pr_info("\tkey %d (%llu %u %llu) block %llu gen %llu\n", 380 i, key.objectid, key.type, key.offset, 381 btrfs_node_blockptr(c, i), 382 btrfs_node_ptr_generation(c, i)); 383 } 384 if (!follow) 385 return; 386 for (i = 0; i < nr; i++) { 387 struct btrfs_key first_key; 388 struct extent_buffer *next; 389 390 btrfs_node_key_to_cpu(c, &first_key, i); 391 next = read_tree_block(fs_info, btrfs_node_blockptr(c, i), 392 btrfs_header_owner(c), 393 btrfs_node_ptr_generation(c, i), 394 level - 1, &first_key); 395 if (IS_ERR(next)) 396 continue; 397 if (!extent_buffer_uptodate(next)) { 398 free_extent_buffer(next); 399 continue; 400 } 401 402 if (btrfs_is_leaf(next) && 403 level != 1) 404 BUG(); 405 if (btrfs_header_level(next) != 406 level - 1) 407 BUG(); 408 btrfs_print_tree(next, follow); 409 free_extent_buffer(next); 410 } 411 } 412