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 %x %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 void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l) 159 { 160 int i; 161 u32 type; 162 u32 nr = btrfs_header_nritems(l); 163 struct btrfs_item *item; 164 struct btrfs_root_item *ri; 165 struct btrfs_dir_item *di; 166 struct btrfs_inode_item *ii; 167 struct btrfs_block_group_item *bi; 168 struct btrfs_file_extent_item *fi; 169 struct btrfs_extent_data_ref *dref; 170 struct btrfs_shared_data_ref *sref; 171 struct btrfs_dev_extent *dev_extent; 172 struct btrfs_key key; 173 struct btrfs_key found_key; 174 175 printk(KERN_INFO "leaf %llu total ptrs %d free space %d\n", 176 (unsigned long long)btrfs_header_bytenr(l), nr, 177 btrfs_leaf_free_space(root, l)); 178 for (i = 0 ; i < nr ; i++) { 179 item = btrfs_item_nr(l, i); 180 btrfs_item_key_to_cpu(l, &key, i); 181 type = btrfs_key_type(&key); 182 printk(KERN_INFO "\titem %d key (%llu %x %llu) itemoff %d " 183 "itemsize %d\n", 184 i, 185 (unsigned long long)key.objectid, type, 186 (unsigned long long)key.offset, 187 btrfs_item_offset(l, item), btrfs_item_size(l, item)); 188 switch (type) { 189 case BTRFS_INODE_ITEM_KEY: 190 ii = btrfs_item_ptr(l, i, struct btrfs_inode_item); 191 printk(KERN_INFO "\t\tinode generation %llu size %llu " 192 "mode %o\n", 193 (unsigned long long) 194 btrfs_inode_generation(l, ii), 195 (unsigned long long)btrfs_inode_size(l, ii), 196 btrfs_inode_mode(l, ii)); 197 break; 198 case BTRFS_DIR_ITEM_KEY: 199 di = btrfs_item_ptr(l, i, struct btrfs_dir_item); 200 btrfs_dir_item_key_to_cpu(l, di, &found_key); 201 printk(KERN_INFO "\t\tdir oid %llu type %u\n", 202 (unsigned long long)found_key.objectid, 203 btrfs_dir_type(l, di)); 204 break; 205 case BTRFS_ROOT_ITEM_KEY: 206 ri = btrfs_item_ptr(l, i, struct btrfs_root_item); 207 printk(KERN_INFO "\t\troot data bytenr %llu refs %u\n", 208 (unsigned long long) 209 btrfs_disk_root_bytenr(l, ri), 210 btrfs_disk_root_refs(l, ri)); 211 break; 212 case BTRFS_EXTENT_ITEM_KEY: 213 print_extent_item(l, i); 214 break; 215 case BTRFS_TREE_BLOCK_REF_KEY: 216 printk(KERN_INFO "\t\ttree block backref\n"); 217 break; 218 case BTRFS_SHARED_BLOCK_REF_KEY: 219 printk(KERN_INFO "\t\tshared block backref\n"); 220 break; 221 case BTRFS_EXTENT_DATA_REF_KEY: 222 dref = btrfs_item_ptr(l, i, 223 struct btrfs_extent_data_ref); 224 print_extent_data_ref(l, dref); 225 break; 226 case BTRFS_SHARED_DATA_REF_KEY: 227 sref = btrfs_item_ptr(l, i, 228 struct btrfs_shared_data_ref); 229 printk(KERN_INFO "\t\tshared data backref count %u\n", 230 btrfs_shared_data_ref_count(l, sref)); 231 break; 232 case BTRFS_EXTENT_DATA_KEY: 233 fi = btrfs_item_ptr(l, i, 234 struct btrfs_file_extent_item); 235 if (btrfs_file_extent_type(l, fi) == 236 BTRFS_FILE_EXTENT_INLINE) { 237 printk(KERN_INFO "\t\tinline extent data " 238 "size %u\n", 239 btrfs_file_extent_inline_len(l, fi)); 240 break; 241 } 242 printk(KERN_INFO "\t\textent data disk bytenr %llu " 243 "nr %llu\n", 244 (unsigned long long) 245 btrfs_file_extent_disk_bytenr(l, fi), 246 (unsigned long long) 247 btrfs_file_extent_disk_num_bytes(l, fi)); 248 printk(KERN_INFO "\t\textent data offset %llu " 249 "nr %llu ram %llu\n", 250 (unsigned long long) 251 btrfs_file_extent_offset(l, fi), 252 (unsigned long long) 253 btrfs_file_extent_num_bytes(l, fi), 254 (unsigned long long) 255 btrfs_file_extent_ram_bytes(l, fi)); 256 break; 257 case BTRFS_EXTENT_REF_V0_KEY: 258 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0 259 print_extent_ref_v0(l, i); 260 #else 261 BUG(); 262 #endif 263 case BTRFS_BLOCK_GROUP_ITEM_KEY: 264 bi = btrfs_item_ptr(l, i, 265 struct btrfs_block_group_item); 266 printk(KERN_INFO "\t\tblock group used %llu\n", 267 (unsigned long long) 268 btrfs_disk_block_group_used(l, bi)); 269 break; 270 case BTRFS_CHUNK_ITEM_KEY: 271 print_chunk(l, btrfs_item_ptr(l, i, 272 struct btrfs_chunk)); 273 break; 274 case BTRFS_DEV_ITEM_KEY: 275 print_dev_item(l, btrfs_item_ptr(l, i, 276 struct btrfs_dev_item)); 277 break; 278 case BTRFS_DEV_EXTENT_KEY: 279 dev_extent = btrfs_item_ptr(l, i, 280 struct btrfs_dev_extent); 281 printk(KERN_INFO "\t\tdev extent chunk_tree %llu\n" 282 "\t\tchunk objectid %llu chunk offset %llu " 283 "length %llu\n", 284 (unsigned long long) 285 btrfs_dev_extent_chunk_tree(l, dev_extent), 286 (unsigned long long) 287 btrfs_dev_extent_chunk_objectid(l, dev_extent), 288 (unsigned long long) 289 btrfs_dev_extent_chunk_offset(l, dev_extent), 290 (unsigned long long) 291 btrfs_dev_extent_length(l, dev_extent)); 292 }; 293 } 294 } 295 296 void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *c) 297 { 298 int i; u32 nr; 299 struct btrfs_key key; 300 int level; 301 302 if (!c) 303 return; 304 nr = btrfs_header_nritems(c); 305 level = btrfs_header_level(c); 306 if (level == 0) { 307 btrfs_print_leaf(root, c); 308 return; 309 } 310 printk(KERN_INFO "node %llu level %d total ptrs %d free spc %u\n", 311 (unsigned long long)btrfs_header_bytenr(c), 312 level, nr, 313 (u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr); 314 for (i = 0; i < nr; i++) { 315 btrfs_node_key_to_cpu(c, &key, i); 316 printk(KERN_INFO "\tkey %d (%llu %u %llu) block %llu\n", 317 i, 318 (unsigned long long)key.objectid, 319 key.type, 320 (unsigned long long)key.offset, 321 (unsigned long long)btrfs_node_blockptr(c, i)); 322 } 323 for (i = 0; i < nr; i++) { 324 struct extent_buffer *next = read_tree_block(root, 325 btrfs_node_blockptr(c, i), 326 btrfs_level_size(root, level - 1), 327 btrfs_node_ptr_generation(c, i)); 328 if (btrfs_is_leaf(next) && 329 level != 1) 330 BUG(); 331 if (btrfs_header_level(next) != 332 level - 1) 333 BUG(); 334 btrfs_print_tree(root, next); 335 free_extent_buffer(next); 336 } 337 } 338