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 #include "tree-checker.h" 12 #include "volumes.h" 13 #include "raid-stripe-tree.h" 14 15 struct root_name_map { 16 u64 id; 17 const char *name; 18 }; 19 20 static const struct root_name_map root_map[] = { 21 { BTRFS_ROOT_TREE_OBJECTID, "ROOT_TREE" }, 22 { BTRFS_EXTENT_TREE_OBJECTID, "EXTENT_TREE" }, 23 { BTRFS_CHUNK_TREE_OBJECTID, "CHUNK_TREE" }, 24 { BTRFS_DEV_TREE_OBJECTID, "DEV_TREE" }, 25 { BTRFS_FS_TREE_OBJECTID, "FS_TREE" }, 26 { BTRFS_CSUM_TREE_OBJECTID, "CSUM_TREE" }, 27 { BTRFS_TREE_LOG_OBJECTID, "TREE_LOG" }, 28 { BTRFS_QUOTA_TREE_OBJECTID, "QUOTA_TREE" }, 29 { BTRFS_UUID_TREE_OBJECTID, "UUID_TREE" }, 30 { BTRFS_FREE_SPACE_TREE_OBJECTID, "FREE_SPACE_TREE" }, 31 { BTRFS_BLOCK_GROUP_TREE_OBJECTID, "BLOCK_GROUP_TREE" }, 32 { BTRFS_DATA_RELOC_TREE_OBJECTID, "DATA_RELOC_TREE" }, 33 { BTRFS_RAID_STRIPE_TREE_OBJECTID, "RAID_STRIPE_TREE" }, 34 }; 35 36 const char *btrfs_root_name(const struct btrfs_key *key, char *buf) 37 { 38 int i; 39 40 if (key->objectid == BTRFS_TREE_RELOC_OBJECTID) { 41 snprintf(buf, BTRFS_ROOT_NAME_BUF_LEN, 42 "TREE_RELOC offset=%llu", key->offset); 43 return buf; 44 } 45 46 for (i = 0; i < ARRAY_SIZE(root_map); i++) { 47 if (root_map[i].id == key->objectid) 48 return root_map[i].name; 49 } 50 51 snprintf(buf, BTRFS_ROOT_NAME_BUF_LEN, "%llu", key->objectid); 52 return buf; 53 } 54 55 static void print_chunk(const struct extent_buffer *eb, struct btrfs_chunk *chunk) 56 { 57 int num_stripes = btrfs_chunk_num_stripes(eb, chunk); 58 int i; 59 pr_info("\t\tchunk length %llu owner %llu type %llu num_stripes %d\n", 60 btrfs_chunk_length(eb, chunk), btrfs_chunk_owner(eb, chunk), 61 btrfs_chunk_type(eb, chunk), num_stripes); 62 for (i = 0 ; i < num_stripes ; i++) { 63 pr_info("\t\t\tstripe %d devid %llu offset %llu\n", i, 64 btrfs_stripe_devid_nr(eb, chunk, i), 65 btrfs_stripe_offset_nr(eb, chunk, i)); 66 } 67 } 68 static void print_dev_item(const struct extent_buffer *eb, 69 struct btrfs_dev_item *dev_item) 70 { 71 pr_info("\t\tdev item devid %llu total_bytes %llu bytes used %llu\n", 72 btrfs_device_id(eb, dev_item), 73 btrfs_device_total_bytes(eb, dev_item), 74 btrfs_device_bytes_used(eb, dev_item)); 75 } 76 static void print_extent_data_ref(const struct extent_buffer *eb, 77 struct btrfs_extent_data_ref *ref) 78 { 79 pr_cont("extent data backref root %llu objectid %llu offset %llu count %u\n", 80 btrfs_extent_data_ref_root(eb, ref), 81 btrfs_extent_data_ref_objectid(eb, ref), 82 btrfs_extent_data_ref_offset(eb, ref), 83 btrfs_extent_data_ref_count(eb, ref)); 84 } 85 86 static void print_extent_owner_ref(const struct extent_buffer *eb, 87 const struct btrfs_extent_owner_ref *ref) 88 { 89 ASSERT(btrfs_fs_incompat(eb->fs_info, SIMPLE_QUOTA)); 90 pr_cont("extent data owner root %llu\n", btrfs_extent_owner_ref_root_id(eb, ref)); 91 } 92 93 static void print_extent_item(const struct extent_buffer *eb, int slot, int type) 94 { 95 struct btrfs_extent_item *ei; 96 struct btrfs_extent_inline_ref *iref; 97 struct btrfs_extent_data_ref *dref; 98 struct btrfs_shared_data_ref *sref; 99 struct btrfs_extent_owner_ref *oref; 100 struct btrfs_disk_key key; 101 unsigned long end; 102 unsigned long ptr; 103 u32 item_size = btrfs_item_size(eb, slot); 104 u64 flags; 105 u64 offset; 106 int ref_index = 0; 107 108 if (unlikely(item_size < sizeof(*ei))) { 109 btrfs_err(eb->fs_info, 110 "unexpected extent item size, has %u expect >= %zu", 111 item_size, sizeof(*ei)); 112 return; 113 } 114 115 ei = btrfs_item_ptr(eb, slot, struct btrfs_extent_item); 116 flags = btrfs_extent_flags(eb, ei); 117 118 pr_info("\t\textent refs %llu gen %llu flags %llu\n", 119 btrfs_extent_refs(eb, ei), btrfs_extent_generation(eb, ei), 120 flags); 121 122 if ((type == BTRFS_EXTENT_ITEM_KEY) && 123 flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) { 124 struct btrfs_tree_block_info *info; 125 info = (struct btrfs_tree_block_info *)(ei + 1); 126 btrfs_tree_block_key(eb, info, &key); 127 pr_info("\t\ttree block key (%llu %u %llu) level %d\n", 128 btrfs_disk_key_objectid(&key), key.type, 129 btrfs_disk_key_offset(&key), 130 btrfs_tree_block_level(eb, info)); 131 iref = (struct btrfs_extent_inline_ref *)(info + 1); 132 } else { 133 iref = (struct btrfs_extent_inline_ref *)(ei + 1); 134 } 135 136 ptr = (unsigned long)iref; 137 end = (unsigned long)ei + item_size; 138 while (ptr < end) { 139 iref = (struct btrfs_extent_inline_ref *)ptr; 140 type = btrfs_extent_inline_ref_type(eb, iref); 141 offset = btrfs_extent_inline_ref_offset(eb, iref); 142 pr_info("\t\tref#%d: ", ref_index++); 143 switch (type) { 144 case BTRFS_TREE_BLOCK_REF_KEY: 145 pr_cont("tree block backref root %llu\n", offset); 146 break; 147 case BTRFS_SHARED_BLOCK_REF_KEY: 148 pr_cont("shared block backref parent %llu\n", offset); 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->sectorsize)) 154 pr_info( 155 "\t\t\t(parent %llu not aligned to sectorsize %u)\n", 156 offset, eb->fs_info->sectorsize); 157 break; 158 case BTRFS_EXTENT_DATA_REF_KEY: 159 dref = (struct btrfs_extent_data_ref *)(&iref->offset); 160 print_extent_data_ref(eb, dref); 161 break; 162 case BTRFS_SHARED_DATA_REF_KEY: 163 sref = (struct btrfs_shared_data_ref *)(iref + 1); 164 pr_cont("shared data backref parent %llu count %u\n", 165 offset, btrfs_shared_data_ref_count(eb, sref)); 166 /* 167 * Offset is supposed to be a tree block which must be 168 * aligned to sectorsize. 169 */ 170 if (!IS_ALIGNED(offset, eb->fs_info->sectorsize)) 171 pr_info( 172 "\t\t\t(parent %llu not aligned to sectorsize %u)\n", 173 offset, eb->fs_info->sectorsize); 174 break; 175 case BTRFS_EXTENT_OWNER_REF_KEY: 176 oref = (struct btrfs_extent_owner_ref *)(&iref->offset); 177 print_extent_owner_ref(eb, oref); 178 break; 179 default: 180 pr_cont("(extent %llu has INVALID ref type %d)\n", 181 eb->start, type); 182 return; 183 } 184 ptr += btrfs_extent_inline_ref_size(type); 185 } 186 WARN_ON(ptr > end); 187 } 188 189 static void print_uuid_item(const struct extent_buffer *l, unsigned long offset, 190 u32 item_size) 191 { 192 if (!IS_ALIGNED(item_size, sizeof(u64))) { 193 pr_warn("BTRFS: uuid item with illegal size %lu!\n", 194 (unsigned long)item_size); 195 return; 196 } 197 while (item_size) { 198 __le64 subvol_id; 199 200 read_extent_buffer(l, &subvol_id, offset, sizeof(subvol_id)); 201 pr_info("\t\tsubvol_id %llu\n", le64_to_cpu(subvol_id)); 202 item_size -= sizeof(u64); 203 offset += sizeof(u64); 204 } 205 } 206 207 static void print_raid_stripe_key(const struct extent_buffer *eb, u32 item_size, 208 struct btrfs_stripe_extent *stripe) 209 { 210 const int num_stripes = btrfs_num_raid_stripes(item_size); 211 212 for (int i = 0; i < num_stripes; i++) 213 pr_info("\t\t\tstride %d devid %llu physical %llu\n", 214 i, btrfs_raid_stride_devid(eb, &stripe->strides[i]), 215 btrfs_raid_stride_physical(eb, &stripe->strides[i])); 216 } 217 218 /* 219 * Helper to output refs and locking status of extent buffer. Useful to debug 220 * race condition related problems. 221 */ 222 static void print_eb_refs_lock(const struct extent_buffer *eb) 223 { 224 #ifdef CONFIG_BTRFS_DEBUG 225 btrfs_info(eb->fs_info, "refs %u lock_owner %u current %u", 226 atomic_read(&eb->refs), eb->lock_owner, current->pid); 227 #endif 228 } 229 230 void btrfs_print_leaf(const struct extent_buffer *l) 231 { 232 struct btrfs_fs_info *fs_info; 233 int i; 234 u32 type, nr; 235 struct btrfs_root_item *ri; 236 struct btrfs_dir_item *di; 237 struct btrfs_inode_item *ii; 238 struct btrfs_block_group_item *bi; 239 struct btrfs_file_extent_item *fi; 240 struct btrfs_extent_data_ref *dref; 241 struct btrfs_shared_data_ref *sref; 242 struct btrfs_dev_extent *dev_extent; 243 struct btrfs_key key; 244 struct btrfs_key found_key; 245 246 if (!l) 247 return; 248 249 fs_info = l->fs_info; 250 nr = btrfs_header_nritems(l); 251 252 btrfs_info(fs_info, 253 "leaf %llu gen %llu total ptrs %d free space %d owner %llu", 254 btrfs_header_bytenr(l), btrfs_header_generation(l), nr, 255 btrfs_leaf_free_space(l), btrfs_header_owner(l)); 256 print_eb_refs_lock(l); 257 for (i = 0 ; i < nr ; i++) { 258 btrfs_item_key_to_cpu(l, &key, i); 259 type = key.type; 260 pr_info("\titem %d key (%llu %u %llu) itemoff %d itemsize %d\n", 261 i, key.objectid, type, key.offset, 262 btrfs_item_offset(l, i), btrfs_item_size(l, i)); 263 switch (type) { 264 case BTRFS_INODE_ITEM_KEY: 265 ii = btrfs_item_ptr(l, i, struct btrfs_inode_item); 266 pr_info("\t\tinode generation %llu size %llu mode %o\n", 267 btrfs_inode_generation(l, ii), 268 btrfs_inode_size(l, ii), 269 btrfs_inode_mode(l, ii)); 270 break; 271 case BTRFS_DIR_ITEM_KEY: 272 di = btrfs_item_ptr(l, i, struct btrfs_dir_item); 273 btrfs_dir_item_key_to_cpu(l, di, &found_key); 274 pr_info("\t\tdir oid %llu flags %u\n", 275 found_key.objectid, 276 btrfs_dir_flags(l, di)); 277 break; 278 case BTRFS_ROOT_ITEM_KEY: 279 ri = btrfs_item_ptr(l, i, struct btrfs_root_item); 280 pr_info("\t\troot data bytenr %llu refs %u\n", 281 btrfs_disk_root_bytenr(l, ri), 282 btrfs_disk_root_refs(l, ri)); 283 break; 284 case BTRFS_EXTENT_ITEM_KEY: 285 case BTRFS_METADATA_ITEM_KEY: 286 print_extent_item(l, i, type); 287 break; 288 case BTRFS_TREE_BLOCK_REF_KEY: 289 pr_info("\t\ttree block backref\n"); 290 break; 291 case BTRFS_SHARED_BLOCK_REF_KEY: 292 pr_info("\t\tshared block backref\n"); 293 break; 294 case BTRFS_EXTENT_DATA_REF_KEY: 295 dref = btrfs_item_ptr(l, i, 296 struct btrfs_extent_data_ref); 297 print_extent_data_ref(l, dref); 298 break; 299 case BTRFS_SHARED_DATA_REF_KEY: 300 sref = btrfs_item_ptr(l, i, 301 struct btrfs_shared_data_ref); 302 pr_info("\t\tshared data backref count %u\n", 303 btrfs_shared_data_ref_count(l, sref)); 304 break; 305 case BTRFS_EXTENT_DATA_KEY: 306 fi = btrfs_item_ptr(l, i, 307 struct btrfs_file_extent_item); 308 pr_info("\t\tgeneration %llu type %hhu\n", 309 btrfs_file_extent_generation(l, fi), 310 btrfs_file_extent_type(l, fi)); 311 if (btrfs_file_extent_type(l, fi) == 312 BTRFS_FILE_EXTENT_INLINE) { 313 pr_info("\t\tinline extent data size %llu\n", 314 btrfs_file_extent_ram_bytes(l, fi)); 315 break; 316 } 317 pr_info("\t\textent data disk bytenr %llu nr %llu\n", 318 btrfs_file_extent_disk_bytenr(l, fi), 319 btrfs_file_extent_disk_num_bytes(l, fi)); 320 pr_info("\t\textent data offset %llu nr %llu ram %llu\n", 321 btrfs_file_extent_offset(l, fi), 322 btrfs_file_extent_num_bytes(l, fi), 323 btrfs_file_extent_ram_bytes(l, fi)); 324 break; 325 case BTRFS_BLOCK_GROUP_ITEM_KEY: 326 bi = btrfs_item_ptr(l, i, 327 struct btrfs_block_group_item); 328 pr_info( 329 "\t\tblock group used %llu chunk_objectid %llu flags %llu\n", 330 btrfs_block_group_used(l, bi), 331 btrfs_block_group_chunk_objectid(l, bi), 332 btrfs_block_group_flags(l, bi)); 333 break; 334 case BTRFS_CHUNK_ITEM_KEY: 335 print_chunk(l, btrfs_item_ptr(l, i, 336 struct btrfs_chunk)); 337 break; 338 case BTRFS_DEV_ITEM_KEY: 339 print_dev_item(l, btrfs_item_ptr(l, i, 340 struct btrfs_dev_item)); 341 break; 342 case BTRFS_DEV_EXTENT_KEY: 343 dev_extent = btrfs_item_ptr(l, i, 344 struct btrfs_dev_extent); 345 pr_info("\t\tdev extent chunk_tree %llu\n\t\tchunk objectid %llu chunk offset %llu length %llu\n", 346 btrfs_dev_extent_chunk_tree(l, dev_extent), 347 btrfs_dev_extent_chunk_objectid(l, dev_extent), 348 btrfs_dev_extent_chunk_offset(l, dev_extent), 349 btrfs_dev_extent_length(l, dev_extent)); 350 break; 351 case BTRFS_PERSISTENT_ITEM_KEY: 352 pr_info("\t\tpersistent item objectid %llu offset %llu\n", 353 key.objectid, key.offset); 354 switch (key.objectid) { 355 case BTRFS_DEV_STATS_OBJECTID: 356 pr_info("\t\tdevice stats\n"); 357 break; 358 default: 359 pr_info("\t\tunknown persistent item\n"); 360 } 361 break; 362 case BTRFS_TEMPORARY_ITEM_KEY: 363 pr_info("\t\ttemporary item objectid %llu offset %llu\n", 364 key.objectid, key.offset); 365 switch (key.objectid) { 366 case BTRFS_BALANCE_OBJECTID: 367 pr_info("\t\tbalance status\n"); 368 break; 369 default: 370 pr_info("\t\tunknown temporary item\n"); 371 } 372 break; 373 case BTRFS_DEV_REPLACE_KEY: 374 pr_info("\t\tdev replace\n"); 375 break; 376 case BTRFS_UUID_KEY_SUBVOL: 377 case BTRFS_UUID_KEY_RECEIVED_SUBVOL: 378 print_uuid_item(l, btrfs_item_ptr_offset(l, i), 379 btrfs_item_size(l, i)); 380 break; 381 case BTRFS_RAID_STRIPE_KEY: 382 print_raid_stripe_key(l, btrfs_item_size(l, i), 383 btrfs_item_ptr(l, i, struct btrfs_stripe_extent)); 384 break; 385 } 386 } 387 } 388 389 void btrfs_print_tree(const struct extent_buffer *c, bool follow) 390 { 391 struct btrfs_fs_info *fs_info; 392 int i; u32 nr; 393 struct btrfs_key key; 394 int level; 395 396 if (!c) 397 return; 398 fs_info = c->fs_info; 399 nr = btrfs_header_nritems(c); 400 level = btrfs_header_level(c); 401 if (level == 0) { 402 btrfs_print_leaf(c); 403 return; 404 } 405 btrfs_info(fs_info, 406 "node %llu level %d gen %llu total ptrs %d free spc %u owner %llu", 407 btrfs_header_bytenr(c), level, btrfs_header_generation(c), 408 nr, (u32)BTRFS_NODEPTRS_PER_BLOCK(fs_info) - nr, 409 btrfs_header_owner(c)); 410 print_eb_refs_lock(c); 411 for (i = 0; i < nr; i++) { 412 btrfs_node_key_to_cpu(c, &key, i); 413 pr_info("\tkey %d (%llu %u %llu) block %llu gen %llu\n", 414 i, key.objectid, key.type, key.offset, 415 btrfs_node_blockptr(c, i), 416 btrfs_node_ptr_generation(c, i)); 417 } 418 if (!follow) 419 return; 420 for (i = 0; i < nr; i++) { 421 struct btrfs_tree_parent_check check = { 422 .level = level - 1, 423 .transid = btrfs_node_ptr_generation(c, i), 424 .owner_root = btrfs_header_owner(c), 425 .has_first_key = true 426 }; 427 struct extent_buffer *next; 428 429 btrfs_node_key_to_cpu(c, &check.first_key, i); 430 next = read_tree_block(fs_info, btrfs_node_blockptr(c, i), &check); 431 if (IS_ERR(next)) 432 continue; 433 if (!extent_buffer_uptodate(next)) { 434 free_extent_buffer(next); 435 continue; 436 } 437 438 if (btrfs_is_leaf(next) && 439 level != 1) 440 BUG(); 441 if (btrfs_header_level(next) != 442 level - 1) 443 BUG(); 444 btrfs_print_tree(next, follow); 445 free_extent_buffer(next); 446 } 447 } 448