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