1 /* 2 * Copyright (C) 2007 Oracle. All rights reserved. 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public 6 * License v2 as published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 11 * General Public License for more details. 12 * 13 * You should have received a copy of the GNU General Public 14 * License along with this program; if not, write to the 15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 16 * Boston, MA 021110-1307, USA. 17 */ 18 19 #include "ctree.h" 20 #include "disk-io.h" 21 #include "print-tree.h" 22 23 static void print_chunk(struct extent_buffer *eb, struct btrfs_chunk *chunk) 24 { 25 int num_stripes = btrfs_chunk_num_stripes(eb, chunk); 26 int i; 27 printk(KERN_INFO "\t\tchunk length %llu owner %llu type %llu " 28 "num_stripes %d\n", 29 (unsigned long long)btrfs_chunk_length(eb, chunk), 30 (unsigned long long)btrfs_chunk_owner(eb, chunk), 31 (unsigned long long)btrfs_chunk_type(eb, chunk), 32 num_stripes); 33 for (i = 0 ; i < num_stripes ; i++) { 34 printk(KERN_INFO "\t\t\tstripe %d devid %llu offset %llu\n", i, 35 (unsigned long long)btrfs_stripe_devid_nr(eb, chunk, i), 36 (unsigned long long)btrfs_stripe_offset_nr(eb, chunk, i)); 37 } 38 } 39 static void print_dev_item(struct extent_buffer *eb, 40 struct btrfs_dev_item *dev_item) 41 { 42 printk(KERN_INFO "\t\tdev item devid %llu " 43 "total_bytes %llu bytes used %llu\n", 44 (unsigned long long)btrfs_device_id(eb, dev_item), 45 (unsigned long long)btrfs_device_total_bytes(eb, dev_item), 46 (unsigned long long)btrfs_device_bytes_used(eb, dev_item)); 47 } 48 static void print_extent_data_ref(struct extent_buffer *eb, 49 struct btrfs_extent_data_ref *ref) 50 { 51 printk(KERN_INFO "\t\textent data backref root %llu " 52 "objectid %llu offset %llu count %u\n", 53 (unsigned long long)btrfs_extent_data_ref_root(eb, ref), 54 (unsigned long long)btrfs_extent_data_ref_objectid(eb, ref), 55 (unsigned long long)btrfs_extent_data_ref_offset(eb, ref), 56 btrfs_extent_data_ref_count(eb, ref)); 57 } 58 59 static void print_extent_item(struct extent_buffer *eb, int slot) 60 { 61 struct btrfs_extent_item *ei; 62 struct btrfs_extent_inline_ref *iref; 63 struct btrfs_extent_data_ref *dref; 64 struct btrfs_shared_data_ref *sref; 65 struct btrfs_disk_key key; 66 unsigned long end; 67 unsigned long ptr; 68 int type; 69 u32 item_size = btrfs_item_size_nr(eb, slot); 70 u64 flags; 71 u64 offset; 72 73 if (item_size < sizeof(*ei)) { 74 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0 75 struct btrfs_extent_item_v0 *ei0; 76 BUG_ON(item_size != sizeof(*ei0)); 77 ei0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_item_v0); 78 printk(KERN_INFO "\t\textent refs %u\n", 79 btrfs_extent_refs_v0(eb, ei0)); 80 return; 81 #else 82 BUG(); 83 #endif 84 } 85 86 ei = btrfs_item_ptr(eb, slot, struct btrfs_extent_item); 87 flags = btrfs_extent_flags(eb, ei); 88 89 printk(KERN_INFO "\t\textent refs %llu gen %llu flags %llu\n", 90 (unsigned long long)btrfs_extent_refs(eb, ei), 91 (unsigned long long)btrfs_extent_generation(eb, ei), 92 (unsigned long long)flags); 93 94 if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) { 95 struct btrfs_tree_block_info *info; 96 info = (struct btrfs_tree_block_info *)(ei + 1); 97 btrfs_tree_block_key(eb, info, &key); 98 printk(KERN_INFO "\t\ttree block key (%llu %u %llu) " 99 "level %d\n", 100 (unsigned long long)btrfs_disk_key_objectid(&key), 101 key.type, 102 (unsigned long long)btrfs_disk_key_offset(&key), 103 btrfs_tree_block_level(eb, info)); 104 iref = (struct btrfs_extent_inline_ref *)(info + 1); 105 } else { 106 iref = (struct btrfs_extent_inline_ref *)(ei + 1); 107 } 108 109 ptr = (unsigned long)iref; 110 end = (unsigned long)ei + item_size; 111 while (ptr < end) { 112 iref = (struct btrfs_extent_inline_ref *)ptr; 113 type = btrfs_extent_inline_ref_type(eb, iref); 114 offset = btrfs_extent_inline_ref_offset(eb, iref); 115 switch (type) { 116 case BTRFS_TREE_BLOCK_REF_KEY: 117 printk(KERN_INFO "\t\ttree block backref " 118 "root %llu\n", (unsigned long long)offset); 119 break; 120 case BTRFS_SHARED_BLOCK_REF_KEY: 121 printk(KERN_INFO "\t\tshared block backref " 122 "parent %llu\n", (unsigned long long)offset); 123 break; 124 case BTRFS_EXTENT_DATA_REF_KEY: 125 dref = (struct btrfs_extent_data_ref *)(&iref->offset); 126 print_extent_data_ref(eb, dref); 127 break; 128 case BTRFS_SHARED_DATA_REF_KEY: 129 sref = (struct btrfs_shared_data_ref *)(iref + 1); 130 printk(KERN_INFO "\t\tshared data backref " 131 "parent %llu count %u\n", 132 (unsigned long long)offset, 133 btrfs_shared_data_ref_count(eb, sref)); 134 break; 135 default: 136 BUG(); 137 } 138 ptr += btrfs_extent_inline_ref_size(type); 139 } 140 WARN_ON(ptr > end); 141 } 142 143 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0 144 static void print_extent_ref_v0(struct extent_buffer *eb, int slot) 145 { 146 struct btrfs_extent_ref_v0 *ref0; 147 148 ref0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_ref_v0); 149 printk("\t\textent back ref root %llu gen %llu " 150 "owner %llu num_refs %lu\n", 151 (unsigned long long)btrfs_ref_root_v0(eb, ref0), 152 (unsigned long long)btrfs_ref_generation_v0(eb, ref0), 153 (unsigned long long)btrfs_ref_objectid_v0(eb, ref0), 154 (unsigned long)btrfs_ref_count_v0(eb, ref0)); 155 } 156 #endif 157 158 static void print_uuid_item(struct extent_buffer *l, unsigned long offset, 159 u32 item_size) 160 { 161 if (!IS_ALIGNED(item_size, sizeof(u64))) { 162 pr_warn("btrfs: uuid item with illegal size %lu!\n", 163 (unsigned long)item_size); 164 return; 165 } 166 while (item_size) { 167 __le64 subvol_id; 168 169 read_extent_buffer(l, &subvol_id, offset, sizeof(subvol_id)); 170 printk(KERN_INFO "\t\tsubvol_id %llu\n", 171 (unsigned long long)le64_to_cpu(subvol_id)); 172 item_size -= sizeof(u64); 173 offset += sizeof(u64); 174 } 175 } 176 177 void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l) 178 { 179 int i; 180 u32 type, nr; 181 struct btrfs_item *item; 182 struct btrfs_root_item *ri; 183 struct btrfs_dir_item *di; 184 struct btrfs_inode_item *ii; 185 struct btrfs_block_group_item *bi; 186 struct btrfs_file_extent_item *fi; 187 struct btrfs_extent_data_ref *dref; 188 struct btrfs_shared_data_ref *sref; 189 struct btrfs_dev_extent *dev_extent; 190 struct btrfs_key key; 191 struct btrfs_key found_key; 192 193 if (!l) 194 return; 195 196 nr = btrfs_header_nritems(l); 197 198 btrfs_info(root->fs_info, "leaf %llu total ptrs %d free space %d", 199 (unsigned long long)btrfs_header_bytenr(l), nr, 200 btrfs_leaf_free_space(root, l)); 201 for (i = 0 ; i < nr ; i++) { 202 item = btrfs_item_nr(l, i); 203 btrfs_item_key_to_cpu(l, &key, i); 204 type = btrfs_key_type(&key); 205 printk(KERN_INFO "\titem %d key (%llu %u %llu) itemoff %d " 206 "itemsize %d\n", 207 i, 208 (unsigned long long)key.objectid, type, 209 (unsigned long long)key.offset, 210 btrfs_item_offset(l, item), btrfs_item_size(l, item)); 211 switch (type) { 212 case BTRFS_INODE_ITEM_KEY: 213 ii = btrfs_item_ptr(l, i, struct btrfs_inode_item); 214 printk(KERN_INFO "\t\tinode generation %llu size %llu " 215 "mode %o\n", 216 (unsigned long long) 217 btrfs_inode_generation(l, ii), 218 (unsigned long long)btrfs_inode_size(l, ii), 219 btrfs_inode_mode(l, ii)); 220 break; 221 case BTRFS_DIR_ITEM_KEY: 222 di = btrfs_item_ptr(l, i, struct btrfs_dir_item); 223 btrfs_dir_item_key_to_cpu(l, di, &found_key); 224 printk(KERN_INFO "\t\tdir oid %llu type %u\n", 225 (unsigned long long)found_key.objectid, 226 btrfs_dir_type(l, di)); 227 break; 228 case BTRFS_ROOT_ITEM_KEY: 229 ri = btrfs_item_ptr(l, i, struct btrfs_root_item); 230 printk(KERN_INFO "\t\troot data bytenr %llu refs %u\n", 231 (unsigned long long) 232 btrfs_disk_root_bytenr(l, ri), 233 btrfs_disk_root_refs(l, ri)); 234 break; 235 case BTRFS_EXTENT_ITEM_KEY: 236 print_extent_item(l, i); 237 break; 238 case BTRFS_TREE_BLOCK_REF_KEY: 239 printk(KERN_INFO "\t\ttree block backref\n"); 240 break; 241 case BTRFS_SHARED_BLOCK_REF_KEY: 242 printk(KERN_INFO "\t\tshared block backref\n"); 243 break; 244 case BTRFS_EXTENT_DATA_REF_KEY: 245 dref = btrfs_item_ptr(l, i, 246 struct btrfs_extent_data_ref); 247 print_extent_data_ref(l, dref); 248 break; 249 case BTRFS_SHARED_DATA_REF_KEY: 250 sref = btrfs_item_ptr(l, i, 251 struct btrfs_shared_data_ref); 252 printk(KERN_INFO "\t\tshared data backref count %u\n", 253 btrfs_shared_data_ref_count(l, sref)); 254 break; 255 case BTRFS_EXTENT_DATA_KEY: 256 fi = btrfs_item_ptr(l, i, 257 struct btrfs_file_extent_item); 258 if (btrfs_file_extent_type(l, fi) == 259 BTRFS_FILE_EXTENT_INLINE) { 260 printk(KERN_INFO "\t\tinline extent data " 261 "size %u\n", 262 btrfs_file_extent_inline_len(l, fi)); 263 break; 264 } 265 printk(KERN_INFO "\t\textent data disk bytenr %llu " 266 "nr %llu\n", 267 (unsigned long long) 268 btrfs_file_extent_disk_bytenr(l, fi), 269 (unsigned long long) 270 btrfs_file_extent_disk_num_bytes(l, fi)); 271 printk(KERN_INFO "\t\textent data offset %llu " 272 "nr %llu ram %llu\n", 273 (unsigned long long) 274 btrfs_file_extent_offset(l, fi), 275 (unsigned long long) 276 btrfs_file_extent_num_bytes(l, fi), 277 (unsigned long long) 278 btrfs_file_extent_ram_bytes(l, fi)); 279 break; 280 case BTRFS_EXTENT_REF_V0_KEY: 281 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0 282 print_extent_ref_v0(l, i); 283 #else 284 BUG(); 285 #endif 286 break; 287 case BTRFS_BLOCK_GROUP_ITEM_KEY: 288 bi = btrfs_item_ptr(l, i, 289 struct btrfs_block_group_item); 290 printk(KERN_INFO "\t\tblock group used %llu\n", 291 (unsigned long long) 292 btrfs_disk_block_group_used(l, bi)); 293 break; 294 case BTRFS_CHUNK_ITEM_KEY: 295 print_chunk(l, btrfs_item_ptr(l, i, 296 struct btrfs_chunk)); 297 break; 298 case BTRFS_DEV_ITEM_KEY: 299 print_dev_item(l, btrfs_item_ptr(l, i, 300 struct btrfs_dev_item)); 301 break; 302 case BTRFS_DEV_EXTENT_KEY: 303 dev_extent = btrfs_item_ptr(l, i, 304 struct btrfs_dev_extent); 305 printk(KERN_INFO "\t\tdev extent chunk_tree %llu\n" 306 "\t\tchunk objectid %llu chunk offset %llu " 307 "length %llu\n", 308 (unsigned long long) 309 btrfs_dev_extent_chunk_tree(l, dev_extent), 310 (unsigned long long) 311 btrfs_dev_extent_chunk_objectid(l, dev_extent), 312 (unsigned long long) 313 btrfs_dev_extent_chunk_offset(l, dev_extent), 314 (unsigned long long) 315 btrfs_dev_extent_length(l, dev_extent)); 316 break; 317 case BTRFS_DEV_STATS_KEY: 318 printk(KERN_INFO "\t\tdevice stats\n"); 319 break; 320 case BTRFS_DEV_REPLACE_KEY: 321 printk(KERN_INFO "\t\tdev replace\n"); 322 break; 323 case BTRFS_UUID_KEY_SUBVOL: 324 case BTRFS_UUID_KEY_RECEIVED_SUBVOL: 325 print_uuid_item(l, btrfs_item_ptr_offset(l, i), 326 btrfs_item_size_nr(l, i)); 327 break; 328 }; 329 } 330 } 331 332 void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *c) 333 { 334 int i; u32 nr; 335 struct btrfs_key key; 336 int level; 337 338 if (!c) 339 return; 340 nr = btrfs_header_nritems(c); 341 level = btrfs_header_level(c); 342 if (level == 0) { 343 btrfs_print_leaf(root, c); 344 return; 345 } 346 btrfs_info(root->fs_info, "node %llu level %d total ptrs %d free spc %u", 347 (unsigned long long)btrfs_header_bytenr(c), 348 level, nr, (u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr); 349 for (i = 0; i < nr; i++) { 350 btrfs_node_key_to_cpu(c, &key, i); 351 printk(KERN_INFO "\tkey %d (%llu %u %llu) block %llu\n", 352 i, 353 (unsigned long long)key.objectid, 354 key.type, 355 (unsigned long long)key.offset, 356 (unsigned long long)btrfs_node_blockptr(c, i)); 357 } 358 for (i = 0; i < nr; i++) { 359 struct extent_buffer *next = read_tree_block(root, 360 btrfs_node_blockptr(c, i), 361 btrfs_level_size(root, level - 1), 362 btrfs_node_ptr_generation(c, i)); 363 if (btrfs_is_leaf(next) && 364 level != 1) 365 BUG(); 366 if (btrfs_header_level(next) != 367 level - 1) 368 BUG(); 369 btrfs_print_tree(root, next); 370 free_extent_buffer(next); 371 } 372 } 373