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