1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 2007 Oracle. All rights reserved. 4 */ 5 6 #include "messages.h" 7 #include "ctree.h" 8 #include "disk-io.h" 9 #include "print-tree.h" 10 #include "accessors.h" 11 12 struct root_name_map { 13 u64 id; 14 char name[16]; 15 }; 16 17 static const struct root_name_map root_map[] = { 18 { BTRFS_ROOT_TREE_OBJECTID, "ROOT_TREE" }, 19 { BTRFS_EXTENT_TREE_OBJECTID, "EXTENT_TREE" }, 20 { BTRFS_CHUNK_TREE_OBJECTID, "CHUNK_TREE" }, 21 { BTRFS_DEV_TREE_OBJECTID, "DEV_TREE" }, 22 { BTRFS_FS_TREE_OBJECTID, "FS_TREE" }, 23 { BTRFS_CSUM_TREE_OBJECTID, "CSUM_TREE" }, 24 { BTRFS_TREE_LOG_OBJECTID, "TREE_LOG" }, 25 { BTRFS_QUOTA_TREE_OBJECTID, "QUOTA_TREE" }, 26 { BTRFS_UUID_TREE_OBJECTID, "UUID_TREE" }, 27 { BTRFS_FREE_SPACE_TREE_OBJECTID, "FREE_SPACE_TREE" }, 28 { BTRFS_BLOCK_GROUP_TREE_OBJECTID, "BLOCK_GROUP_TREE" }, 29 { BTRFS_DATA_RELOC_TREE_OBJECTID, "DATA_RELOC_TREE" }, 30 }; 31 32 const char *btrfs_root_name(const struct btrfs_key *key, char *buf) 33 { 34 int i; 35 36 if (key->objectid == BTRFS_TREE_RELOC_OBJECTID) { 37 snprintf(buf, BTRFS_ROOT_NAME_BUF_LEN, 38 "TREE_RELOC offset=%llu", key->offset); 39 return buf; 40 } 41 42 for (i = 0; i < ARRAY_SIZE(root_map); i++) { 43 if (root_map[i].id == key->objectid) 44 return root_map[i].name; 45 } 46 47 snprintf(buf, BTRFS_ROOT_NAME_BUF_LEN, "%llu", key->objectid); 48 return buf; 49 } 50 51 static void print_chunk(struct extent_buffer *eb, struct btrfs_chunk *chunk) 52 { 53 int num_stripes = btrfs_chunk_num_stripes(eb, chunk); 54 int i; 55 pr_info("\t\tchunk length %llu owner %llu type %llu num_stripes %d\n", 56 btrfs_chunk_length(eb, chunk), btrfs_chunk_owner(eb, chunk), 57 btrfs_chunk_type(eb, chunk), num_stripes); 58 for (i = 0 ; i < num_stripes ; i++) { 59 pr_info("\t\t\tstripe %d devid %llu offset %llu\n", i, 60 btrfs_stripe_devid_nr(eb, chunk, i), 61 btrfs_stripe_offset_nr(eb, chunk, i)); 62 } 63 } 64 static void print_dev_item(struct extent_buffer *eb, 65 struct btrfs_dev_item *dev_item) 66 { 67 pr_info("\t\tdev item devid %llu total_bytes %llu bytes used %llu\n", 68 btrfs_device_id(eb, dev_item), 69 btrfs_device_total_bytes(eb, dev_item), 70 btrfs_device_bytes_used(eb, dev_item)); 71 } 72 static void print_extent_data_ref(struct extent_buffer *eb, 73 struct btrfs_extent_data_ref *ref) 74 { 75 pr_cont("extent data backref root %llu objectid %llu offset %llu count %u\n", 76 btrfs_extent_data_ref_root(eb, ref), 77 btrfs_extent_data_ref_objectid(eb, ref), 78 btrfs_extent_data_ref_offset(eb, ref), 79 btrfs_extent_data_ref_count(eb, ref)); 80 } 81 82 static void print_extent_item(struct extent_buffer *eb, int slot, int type) 83 { 84 struct btrfs_extent_item *ei; 85 struct btrfs_extent_inline_ref *iref; 86 struct btrfs_extent_data_ref *dref; 87 struct btrfs_shared_data_ref *sref; 88 struct btrfs_disk_key key; 89 unsigned long end; 90 unsigned long ptr; 91 u32 item_size = btrfs_item_size(eb, slot); 92 u64 flags; 93 u64 offset; 94 int ref_index = 0; 95 96 if (unlikely(item_size < sizeof(*ei))) { 97 btrfs_print_v0_err(eb->fs_info); 98 btrfs_handle_fs_error(eb->fs_info, -EINVAL, NULL); 99 } 100 101 ei = btrfs_item_ptr(eb, slot, struct btrfs_extent_item); 102 flags = btrfs_extent_flags(eb, ei); 103 104 pr_info("\t\textent refs %llu gen %llu flags %llu\n", 105 btrfs_extent_refs(eb, ei), btrfs_extent_generation(eb, ei), 106 flags); 107 108 if ((type == BTRFS_EXTENT_ITEM_KEY) && 109 flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) { 110 struct btrfs_tree_block_info *info; 111 info = (struct btrfs_tree_block_info *)(ei + 1); 112 btrfs_tree_block_key(eb, info, &key); 113 pr_info("\t\ttree block key (%llu %u %llu) level %d\n", 114 btrfs_disk_key_objectid(&key), key.type, 115 btrfs_disk_key_offset(&key), 116 btrfs_tree_block_level(eb, info)); 117 iref = (struct btrfs_extent_inline_ref *)(info + 1); 118 } else { 119 iref = (struct btrfs_extent_inline_ref *)(ei + 1); 120 } 121 122 ptr = (unsigned long)iref; 123 end = (unsigned long)ei + item_size; 124 while (ptr < end) { 125 iref = (struct btrfs_extent_inline_ref *)ptr; 126 type = btrfs_extent_inline_ref_type(eb, iref); 127 offset = btrfs_extent_inline_ref_offset(eb, iref); 128 pr_info("\t\tref#%d: ", ref_index++); 129 switch (type) { 130 case BTRFS_TREE_BLOCK_REF_KEY: 131 pr_cont("tree block backref root %llu\n", offset); 132 break; 133 case BTRFS_SHARED_BLOCK_REF_KEY: 134 pr_cont("shared block backref parent %llu\n", offset); 135 /* 136 * offset is supposed to be a tree block which 137 * must be aligned to nodesize. 138 */ 139 if (!IS_ALIGNED(offset, eb->fs_info->sectorsize)) 140 pr_info( 141 "\t\t\t(parent %llu not aligned to sectorsize %u)\n", 142 offset, eb->fs_info->sectorsize); 143 break; 144 case BTRFS_EXTENT_DATA_REF_KEY: 145 dref = (struct btrfs_extent_data_ref *)(&iref->offset); 146 print_extent_data_ref(eb, dref); 147 break; 148 case BTRFS_SHARED_DATA_REF_KEY: 149 sref = (struct btrfs_shared_data_ref *)(iref + 1); 150 pr_cont("shared data backref parent %llu count %u\n", 151 offset, btrfs_shared_data_ref_count(eb, sref)); 152 /* 153 * offset is supposed to be a tree block which 154 * must be aligned to nodesize. 155 */ 156 if (!IS_ALIGNED(offset, eb->fs_info->nodesize)) 157 pr_info( 158 "\t\t\t(parent %llu not aligned to sectorsize %u)\n", 159 offset, eb->fs_info->sectorsize); 160 break; 161 default: 162 pr_cont("(extent %llu has INVALID ref type %d)\n", 163 eb->start, type); 164 return; 165 } 166 ptr += btrfs_extent_inline_ref_size(type); 167 } 168 WARN_ON(ptr > end); 169 } 170 171 static void print_uuid_item(struct extent_buffer *l, unsigned long offset, 172 u32 item_size) 173 { 174 if (!IS_ALIGNED(item_size, sizeof(u64))) { 175 pr_warn("BTRFS: uuid item with illegal size %lu!\n", 176 (unsigned long)item_size); 177 return; 178 } 179 while (item_size) { 180 __le64 subvol_id; 181 182 read_extent_buffer(l, &subvol_id, offset, sizeof(subvol_id)); 183 pr_info("\t\tsubvol_id %llu\n", le64_to_cpu(subvol_id)); 184 item_size -= sizeof(u64); 185 offset += sizeof(u64); 186 } 187 } 188 189 /* 190 * Helper to output refs and locking status of extent buffer. Useful to debug 191 * race condition related problems. 192 */ 193 static void print_eb_refs_lock(struct extent_buffer *eb) 194 { 195 #ifdef CONFIG_BTRFS_DEBUG 196 btrfs_info(eb->fs_info, "refs %u lock_owner %u current %u", 197 atomic_read(&eb->refs), eb->lock_owner, current->pid); 198 #endif 199 } 200 201 void btrfs_print_leaf(struct extent_buffer *l) 202 { 203 struct btrfs_fs_info *fs_info; 204 int i; 205 u32 type, nr; 206 struct btrfs_root_item *ri; 207 struct btrfs_dir_item *di; 208 struct btrfs_inode_item *ii; 209 struct btrfs_block_group_item *bi; 210 struct btrfs_file_extent_item *fi; 211 struct btrfs_extent_data_ref *dref; 212 struct btrfs_shared_data_ref *sref; 213 struct btrfs_dev_extent *dev_extent; 214 struct btrfs_key key; 215 struct btrfs_key found_key; 216 217 if (!l) 218 return; 219 220 fs_info = l->fs_info; 221 nr = btrfs_header_nritems(l); 222 223 btrfs_info(fs_info, 224 "leaf %llu gen %llu total ptrs %d free space %d owner %llu", 225 btrfs_header_bytenr(l), btrfs_header_generation(l), nr, 226 btrfs_leaf_free_space(l), btrfs_header_owner(l)); 227 print_eb_refs_lock(l); 228 for (i = 0 ; i < nr ; i++) { 229 btrfs_item_key_to_cpu(l, &key, i); 230 type = key.type; 231 pr_info("\titem %d key (%llu %u %llu) itemoff %d itemsize %d\n", 232 i, key.objectid, type, key.offset, 233 btrfs_item_offset(l, i), btrfs_item_size(l, i)); 234 switch (type) { 235 case BTRFS_INODE_ITEM_KEY: 236 ii = btrfs_item_ptr(l, i, struct btrfs_inode_item); 237 pr_info("\t\tinode generation %llu size %llu mode %o\n", 238 btrfs_inode_generation(l, ii), 239 btrfs_inode_size(l, ii), 240 btrfs_inode_mode(l, ii)); 241 break; 242 case BTRFS_DIR_ITEM_KEY: 243 di = btrfs_item_ptr(l, i, struct btrfs_dir_item); 244 btrfs_dir_item_key_to_cpu(l, di, &found_key); 245 pr_info("\t\tdir oid %llu type %u\n", 246 found_key.objectid, 247 btrfs_dir_type(l, di)); 248 break; 249 case BTRFS_ROOT_ITEM_KEY: 250 ri = btrfs_item_ptr(l, i, struct btrfs_root_item); 251 pr_info("\t\troot data bytenr %llu refs %u\n", 252 btrfs_disk_root_bytenr(l, ri), 253 btrfs_disk_root_refs(l, ri)); 254 break; 255 case BTRFS_EXTENT_ITEM_KEY: 256 case BTRFS_METADATA_ITEM_KEY: 257 print_extent_item(l, i, type); 258 break; 259 case BTRFS_TREE_BLOCK_REF_KEY: 260 pr_info("\t\ttree block backref\n"); 261 break; 262 case BTRFS_SHARED_BLOCK_REF_KEY: 263 pr_info("\t\tshared block backref\n"); 264 break; 265 case BTRFS_EXTENT_DATA_REF_KEY: 266 dref = btrfs_item_ptr(l, i, 267 struct btrfs_extent_data_ref); 268 print_extent_data_ref(l, dref); 269 break; 270 case BTRFS_SHARED_DATA_REF_KEY: 271 sref = btrfs_item_ptr(l, i, 272 struct btrfs_shared_data_ref); 273 pr_info("\t\tshared data backref count %u\n", 274 btrfs_shared_data_ref_count(l, sref)); 275 break; 276 case BTRFS_EXTENT_DATA_KEY: 277 fi = btrfs_item_ptr(l, i, 278 struct btrfs_file_extent_item); 279 if (btrfs_file_extent_type(l, fi) == 280 BTRFS_FILE_EXTENT_INLINE) { 281 pr_info("\t\tinline extent data size %llu\n", 282 btrfs_file_extent_ram_bytes(l, fi)); 283 break; 284 } 285 pr_info("\t\textent data disk bytenr %llu nr %llu\n", 286 btrfs_file_extent_disk_bytenr(l, fi), 287 btrfs_file_extent_disk_num_bytes(l, fi)); 288 pr_info("\t\textent data offset %llu nr %llu ram %llu\n", 289 btrfs_file_extent_offset(l, fi), 290 btrfs_file_extent_num_bytes(l, fi), 291 btrfs_file_extent_ram_bytes(l, fi)); 292 break; 293 case BTRFS_EXTENT_REF_V0_KEY: 294 btrfs_print_v0_err(fs_info); 295 btrfs_handle_fs_error(fs_info, -EINVAL, NULL); 296 break; 297 case BTRFS_BLOCK_GROUP_ITEM_KEY: 298 bi = btrfs_item_ptr(l, i, 299 struct btrfs_block_group_item); 300 pr_info( 301 "\t\tblock group used %llu chunk_objectid %llu flags %llu\n", 302 btrfs_block_group_used(l, bi), 303 btrfs_block_group_chunk_objectid(l, bi), 304 btrfs_block_group_flags(l, bi)); 305 break; 306 case BTRFS_CHUNK_ITEM_KEY: 307 print_chunk(l, btrfs_item_ptr(l, i, 308 struct btrfs_chunk)); 309 break; 310 case BTRFS_DEV_ITEM_KEY: 311 print_dev_item(l, btrfs_item_ptr(l, i, 312 struct btrfs_dev_item)); 313 break; 314 case BTRFS_DEV_EXTENT_KEY: 315 dev_extent = btrfs_item_ptr(l, i, 316 struct btrfs_dev_extent); 317 pr_info("\t\tdev extent chunk_tree %llu\n\t\tchunk objectid %llu chunk offset %llu length %llu\n", 318 btrfs_dev_extent_chunk_tree(l, dev_extent), 319 btrfs_dev_extent_chunk_objectid(l, dev_extent), 320 btrfs_dev_extent_chunk_offset(l, dev_extent), 321 btrfs_dev_extent_length(l, dev_extent)); 322 break; 323 case BTRFS_PERSISTENT_ITEM_KEY: 324 pr_info("\t\tpersistent item objectid %llu offset %llu\n", 325 key.objectid, key.offset); 326 switch (key.objectid) { 327 case BTRFS_DEV_STATS_OBJECTID: 328 pr_info("\t\tdevice stats\n"); 329 break; 330 default: 331 pr_info("\t\tunknown persistent item\n"); 332 } 333 break; 334 case BTRFS_TEMPORARY_ITEM_KEY: 335 pr_info("\t\ttemporary item objectid %llu offset %llu\n", 336 key.objectid, key.offset); 337 switch (key.objectid) { 338 case BTRFS_BALANCE_OBJECTID: 339 pr_info("\t\tbalance status\n"); 340 break; 341 default: 342 pr_info("\t\tunknown temporary item\n"); 343 } 344 break; 345 case BTRFS_DEV_REPLACE_KEY: 346 pr_info("\t\tdev replace\n"); 347 break; 348 case BTRFS_UUID_KEY_SUBVOL: 349 case BTRFS_UUID_KEY_RECEIVED_SUBVOL: 350 print_uuid_item(l, btrfs_item_ptr_offset(l, i), 351 btrfs_item_size(l, i)); 352 break; 353 } 354 } 355 } 356 357 void btrfs_print_tree(struct extent_buffer *c, bool follow) 358 { 359 struct btrfs_fs_info *fs_info; 360 int i; u32 nr; 361 struct btrfs_key key; 362 int level; 363 364 if (!c) 365 return; 366 fs_info = c->fs_info; 367 nr = btrfs_header_nritems(c); 368 level = btrfs_header_level(c); 369 if (level == 0) { 370 btrfs_print_leaf(c); 371 return; 372 } 373 btrfs_info(fs_info, 374 "node %llu level %d gen %llu total ptrs %d free spc %u owner %llu", 375 btrfs_header_bytenr(c), level, btrfs_header_generation(c), 376 nr, (u32)BTRFS_NODEPTRS_PER_BLOCK(fs_info) - nr, 377 btrfs_header_owner(c)); 378 print_eb_refs_lock(c); 379 for (i = 0; i < nr; i++) { 380 btrfs_node_key_to_cpu(c, &key, i); 381 pr_info("\tkey %d (%llu %u %llu) block %llu gen %llu\n", 382 i, key.objectid, key.type, key.offset, 383 btrfs_node_blockptr(c, i), 384 btrfs_node_ptr_generation(c, i)); 385 } 386 if (!follow) 387 return; 388 for (i = 0; i < nr; i++) { 389 struct btrfs_key first_key; 390 struct extent_buffer *next; 391 392 btrfs_node_key_to_cpu(c, &first_key, i); 393 next = read_tree_block(fs_info, btrfs_node_blockptr(c, i), 394 btrfs_header_owner(c), 395 btrfs_node_ptr_generation(c, i), 396 level - 1, &first_key); 397 if (IS_ERR(next)) 398 continue; 399 if (!extent_buffer_uptodate(next)) { 400 free_extent_buffer(next); 401 continue; 402 } 403 404 if (btrfs_is_leaf(next) && 405 level != 1) 406 BUG(); 407 if (btrfs_header_level(next) != 408 level - 1) 409 BUG(); 410 btrfs_print_tree(next, follow); 411 free_extent_buffer(next); 412 } 413 } 414