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