fs/btrfs/print-tree.c

   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 }