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