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 <linux/module.h>
  20 #include "ctree.h"
  21 #include "disk-io.h"
  22 #include "print-tree.h"
  23
  24 void btrfs_print_leaf(struct btrfs_root *root, struct btrfs_leaf *l)
  25 {
  26         int i;
  27         u32 nr = btrfs_header_nritems(&l->header);
  28         struct btrfs_item *item;
  29         struct btrfs_extent_item *ei;
  30         struct btrfs_root_item *ri;
  31         struct btrfs_dir_item *di;
  32         struct btrfs_inode_item *ii;
  33         struct btrfs_block_group_item *bi;
  34         struct btrfs_file_extent_item *fi;
  35         u32 type;
  36
  37         printk("leaf %llu total ptrs %d free space %d\n",
  38                 (unsigned long long)btrfs_header_blocknr(&l->header), nr,
  39                 btrfs_leaf_free_space(root, l));
  40         for (i = 0 ; i < nr ; i++) {
  41                 item = l->items + i;
  42                 type = btrfs_disk_key_type(&item->key);
  43                 printk("\titem %d key (%llu %x %llu) itemoff %d itemsize %d\n",
  44                         i,
  45                         (unsigned long long)btrfs_disk_key_objectid(&item->key),
  46                         btrfs_disk_key_flags(&item->key),
  47                         (unsigned long long)btrfs_disk_key_offset(&item->key),
  48                         btrfs_item_offset(item),
  49                         btrfs_item_size(item));
  50                 switch (type) {
  51                 case BTRFS_INODE_ITEM_KEY:
  52                         ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
  53                         printk("\t\tinode generation %llu size %llu mode %o\n",
  54                                (unsigned long long)btrfs_inode_generation(ii),
  55                                (unsigned long long)btrfs_inode_size(ii),
  56                                btrfs_inode_mode(ii));
  57                         break;
  58                 case BTRFS_DIR_ITEM_KEY:
  59                         di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
  60                         printk("\t\tdir oid %llu flags %u type %u\n",
  61                                 (unsigned long long)btrfs_disk_key_objectid(
  62                                                             &di->location),
  63                                 btrfs_dir_flags(di),
  64                                 btrfs_dir_type(di));
  65                         printk("\t\tname %.*s\n",
  66                                btrfs_dir_name_len(di),(char *)(di + 1));
  67                         break;
  68                 case BTRFS_ROOT_ITEM_KEY:
  69                         ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
  70                         printk("\t\troot data blocknr %llu refs %u\n",
  71                                 (unsigned long long)btrfs_root_blocknr(ri),
  72                                 btrfs_root_refs(ri));
  73                         break;
  74                 case BTRFS_EXTENT_ITEM_KEY:
  75                         ei = btrfs_item_ptr(l, i, struct btrfs_extent_item);
  76                         printk("\t\textent data refs %u\n",
  77                                 btrfs_extent_refs(ei));
  78                         break;
  79
  80                 case BTRFS_EXTENT_DATA_KEY:
  81                         fi = btrfs_item_ptr(l, i,
  82                                             struct btrfs_file_extent_item);
  83                         if (btrfs_file_extent_type(fi) ==
  84                             BTRFS_FILE_EXTENT_INLINE) {
  85                                 printk("\t\tinline extent data size %u\n",
  86                                    btrfs_file_extent_inline_len(l->items + i));
  87                                 break;
  88                         }
  89                         printk("\t\textent data disk block %llu nr %llu\n",
  90                                (unsigned long long)btrfs_file_extent_disk_blocknr(fi),
  91                                (unsigned long long)btrfs_file_extent_disk_num_blocks(fi));
  92                         printk("\t\textent data offset %llu nr %llu\n",
  93                           (unsigned long long)btrfs_file_extent_offset(fi),
  94                           (unsigned long long)btrfs_file_extent_num_blocks(fi));
  95                         break;
  96                 case BTRFS_BLOCK_GROUP_ITEM_KEY:
  97                         bi = btrfs_item_ptr(l, i,
  98                                             struct btrfs_block_group_item);
  99                         printk("\t\tblock group used %llu\n",
 100                                (unsigned long long)btrfs_block_group_used(bi));
 101                         break;
 102                 case BTRFS_STRING_ITEM_KEY:
 103                         printk("\t\titem data %.*s\n", btrfs_item_size(item),
 104                                 btrfs_leaf_data(l) + btrfs_item_offset(item));
 105                         break;
 106                 };
 107         }
 108 }
 109
 110 void btrfs_print_tree(struct btrfs_root *root, struct buffer_head *t)
 111 {
 112         int i;
 113         u32 nr;
 114         struct btrfs_node *c;
 115
 116         if (!t)
 117                 return;
 118         c = btrfs_buffer_node(t);
 119         nr = btrfs_header_nritems(&c->header);
 120         if (btrfs_is_leaf(c)) {
 121                 btrfs_print_leaf(root, (struct btrfs_leaf *)c);
 122                 return;
 123         }
 124         printk("node %llu level %d total ptrs %d free spc %u\n",
 125                (unsigned long long)btrfs_header_blocknr(&c->header),
 126                btrfs_header_level(&c->header), nr,
 127                (u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr);
 128         for (i = 0; i < nr; i++) {
 129                 printk("\tkey %d (%llu %u %llu) block %llu\n",
 130                        i,
 131                        (unsigned long long)c->ptrs[i].key.objectid,
 132                        c->ptrs[i].key.flags,
 133                        (unsigned long long)c->ptrs[i].key.offset,
 134                        (unsigned long long)btrfs_node_blockptr(c, i));
 135         }
 136         for (i = 0; i < nr; i++) {
 137                 struct buffer_head *next_buf = read_tree_block(root,
 138                                                 btrfs_node_blockptr(c, i));
 139                 struct btrfs_node *next = btrfs_buffer_node(next_buf);
 140                 if (btrfs_is_leaf(next) &&
 141                     btrfs_header_level(&c->header) != 1)
 142                         BUG();
 143                 if (btrfs_header_level(&next->header) !=
 144                         btrfs_header_level(&c->header) - 1)
 145                         BUG();
 146                 btrfs_print_tree(root, next_buf);
 147                 btrfs_block_release(root, next_buf);
 148         }
 149 }
 150