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 void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
  24 {
  25         int i;
  26         u32 nr = btrfs_header_nritems(l);
  27         struct btrfs_item *item;
  28         struct btrfs_extent_item *ei;
  29         struct btrfs_root_item *ri;
  30         struct btrfs_dir_item *di;
  31         struct btrfs_inode_item *ii;
  32         struct btrfs_block_group_item *bi;
  33         struct btrfs_file_extent_item *fi;
  34         struct btrfs_key key;
  35         struct btrfs_key found_key;
  36         struct btrfs_extent_ref *ref;
  37         u32 type;
  38
  39         printk("leaf %llu total ptrs %d free space %d\n",
  40                 (unsigned long long)btrfs_header_bytenr(l), nr,
  41                 btrfs_leaf_free_space(root, l));
  42         for (i = 0 ; i < nr ; i++) {
  43                 item = btrfs_item_nr(l, i);
  44                 btrfs_item_key_to_cpu(l, &key, i);
  45                 type = btrfs_key_type(&key);
  46                 printk("\titem %d key (%llu %x %llu) itemoff %d itemsize %d\n",
  47                         i,
  48                         (unsigned long long)key.objectid, type,
  49                         (unsigned long long)key.offset,
  50                         btrfs_item_offset(l, item), btrfs_item_size(l, item));
  51                 switch (type) {
  52                 case BTRFS_INODE_ITEM_KEY:
  53                         ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
  54                         printk("\t\tinode generation %llu size %llu mode %o\n",
  55                               (unsigned long long)btrfs_inode_generation(l, ii),
  56                               (unsigned long long)btrfs_inode_size(l, ii),
  57                                btrfs_inode_mode(l, ii));
  58                         break;
  59                 case BTRFS_DIR_ITEM_KEY:
  60                         di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
  61                         btrfs_dir_item_key_to_cpu(l, di, &found_key);
  62                         printk("\t\tdir oid %llu type %u\n",
  63                                 (unsigned long long)found_key.objectid,
  64                                 btrfs_dir_type(l, di));
  65                         break;
  66                 case BTRFS_ROOT_ITEM_KEY:
  67                         ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
  68                         printk("\t\troot data bytenr %llu refs %u\n",
  69                                 (unsigned long long)btrfs_disk_root_bytenr(l, ri),
  70                                 btrfs_disk_root_refs(l, ri));
  71                         break;
  72                 case BTRFS_EXTENT_ITEM_KEY:
  73                         ei = btrfs_item_ptr(l, i, struct btrfs_extent_item);
  74                         printk("\t\textent data refs %u\n",
  75                                 btrfs_extent_refs(l, ei));
  76                         break;
  77                 case BTRFS_EXTENT_REF_KEY:
  78                         ref = btrfs_item_ptr(l, i, struct btrfs_extent_ref);
  79                         printk("\t\textent back ref root %llu gen %llu "
  80                                "owner %llu offset %llu\n",
  81                                (unsigned long long)btrfs_ref_root(l, ref),
  82                                (unsigned long long)btrfs_ref_generation(l, ref),
  83                                (unsigned long long)btrfs_ref_objectid(l, ref),
  84                                (unsigned long long)btrfs_ref_offset(l, ref));
  85                         break;
  86
  87                 case BTRFS_EXTENT_DATA_KEY:
  88                         fi = btrfs_item_ptr(l, i,
  89                                             struct btrfs_file_extent_item);
  90                         if (btrfs_file_extent_type(l, fi) ==
  91                             BTRFS_FILE_EXTENT_INLINE) {
  92                                 printk("\t\tinline extent data size %u\n",
  93                                    btrfs_file_extent_inline_len(l, item));
  94                                 break;
  95                         }
  96                         printk("\t\textent data disk bytenr %llu nr %llu\n",
  97                                (unsigned long long)btrfs_file_extent_disk_bytenr(l, fi),
  98                                (unsigned long long)btrfs_file_extent_disk_num_bytes(l, fi));
  99                         printk("\t\textent data offset %llu nr %llu\n",
 100                           (unsigned long long)btrfs_file_extent_offset(l, fi),
 101                           (unsigned long long)btrfs_file_extent_num_bytes(l, fi));
 102                         break;
 103                 case BTRFS_BLOCK_GROUP_ITEM_KEY:
 104                         bi = btrfs_item_ptr(l, i,
 105                                             struct btrfs_block_group_item);
 106                         printk("\t\tblock group used %llu\n",
 107                                (unsigned long long)btrfs_disk_block_group_used(l, bi));
 108                         break;
 109                 };
 110         }
 111 }
 112
 113 void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *c)
 114 {
 115         int i;
 116         u32 nr;
 117         struct btrfs_key key;
 118         int level;
 119
 120         if (!c)
 121                 return;
 122         nr = btrfs_header_nritems(c);
 123         level = btrfs_header_level(c);
 124         if (level == 0) {
 125                 btrfs_print_leaf(root, c);
 126                 return;
 127         }
 128         printk("node %llu level %d total ptrs %d free spc %u\n",
 129                (unsigned long long)btrfs_header_bytenr(c),
 130                btrfs_header_level(c), nr,
 131                (u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr);
 132         for (i = 0; i < nr; i++) {
 133                 btrfs_node_key_to_cpu(c, &key, i);
 134                 printk("\tkey %d (%llu %u %llu) block %llu\n",
 135                        i,
 136                        (unsigned long long)key.objectid,
 137                        key.type,
 138                        (unsigned long long)key.offset,
 139                        (unsigned long long)btrfs_node_blockptr(c, i));
 140         }
 141         for (i = 0; i < nr; i++) {
 142                 struct extent_buffer *next = read_tree_block(root,
 143                                         btrfs_node_blockptr(c, i),
 144                                         btrfs_level_size(root, level - 1));
 145                 if (btrfs_is_leaf(next) &&
 146                     btrfs_header_level(c) != 1)
 147                         BUG();
 148                 if (btrfs_header_level(next) !=
 149                         btrfs_header_level(c) - 1)
 150                         BUG();
 151                 btrfs_print_tree(root, next);
 152                 free_extent_buffer(next);
 153         }
 154 }
 155