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("\t\tchunk owner %llu type %llu num_stripes %d\n",
  28                (unsigned long long)btrfs_chunk_owner(eb, chunk),
  29                (unsigned long long)btrfs_chunk_type(eb, chunk),
  30                num_stripes);
  31         for (i = 0 ; i < num_stripes ; i++) {
  32                 printk("\t\t\tstripe %d devid %llu offset %llu\n", i,
  33                       (unsigned long long)btrfs_stripe_devid_nr(eb, chunk, i),
  34                       (unsigned long long)btrfs_stripe_offset_nr(eb, chunk, i));
  35         }
  36 }
  37 static void print_dev_item(struct extent_buffer *eb,
  38                            struct btrfs_dev_item *dev_item)
  39 {
  40         char *name;
  41         int name_len;
  42
  43         name_len = btrfs_device_name_len(eb, dev_item);
  44         name = kmalloc(name_len, GFP_NOFS);
  45         if (name) {
  46                 read_extent_buffer(eb, name,
  47                                    (unsigned long)btrfs_device_name(dev_item),
  48                                    name_len);
  49         }
  50         printk("\t\tdev item name %.*s devid %llu "
  51                "total_bytes %llu bytes used %Lu\n", name_len, name,
  52                (unsigned long long)btrfs_device_id(eb, dev_item),
  53                (unsigned long long)btrfs_device_total_bytes(eb, dev_item),
  54                (unsigned long long)btrfs_device_bytes_used(eb, dev_item));
  55         kfree(name);
  56 }
  57 void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
  58 {
  59         int i;
  60         u32 nr = btrfs_header_nritems(l);
  61         struct btrfs_item *item;
  62         struct btrfs_extent_item *ei;
  63         struct btrfs_root_item *ri;
  64         struct btrfs_dir_item *di;
  65         struct btrfs_inode_item *ii;
  66         struct btrfs_block_group_item *bi;
  67         struct btrfs_file_extent_item *fi;
  68         struct btrfs_key key;
  69         struct btrfs_key found_key;
  70         struct btrfs_extent_ref *ref;
  71         struct btrfs_dev_extent *dev_extent;
  72         u32 type;
  73
  74         printk("leaf %llu total ptrs %d free space %d\n",
  75                 (unsigned long long)btrfs_header_bytenr(l), nr,
  76                 btrfs_leaf_free_space(root, l));
  77         for (i = 0 ; i < nr ; i++) {
  78                 item = btrfs_item_nr(l, i);
  79                 btrfs_item_key_to_cpu(l, &key, i);
  80                 type = btrfs_key_type(&key);
  81                 printk("\titem %d key (%llu %x %llu) itemoff %d itemsize %d\n",
  82                         i,
  83                         (unsigned long long)key.objectid, type,
  84                         (unsigned long long)key.offset,
  85                         btrfs_item_offset(l, item), btrfs_item_size(l, item));
  86                 switch (type) {
  87                 case BTRFS_INODE_ITEM_KEY:
  88                         ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
  89                         printk("\t\tinode generation %llu size %llu mode %o\n",
  90                               (unsigned long long)btrfs_inode_generation(l, ii),
  91                               (unsigned long long)btrfs_inode_size(l, ii),
  92                                btrfs_inode_mode(l, ii));
  93                         break;
  94                 case BTRFS_DIR_ITEM_KEY:
  95                         di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
  96                         btrfs_dir_item_key_to_cpu(l, di, &found_key);
  97                         printk("\t\tdir oid %llu type %u\n",
  98                                 (unsigned long long)found_key.objectid,
  99                                 btrfs_dir_type(l, di));
 100                         break;
 101                 case BTRFS_ROOT_ITEM_KEY:
 102                         ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
 103                         printk("\t\troot data bytenr %llu refs %u\n",
 104                                 (unsigned long long)btrfs_disk_root_bytenr(l, ri),
 105                                 btrfs_disk_root_refs(l, ri));
 106                         break;
 107                 case BTRFS_EXTENT_ITEM_KEY:
 108                         ei = btrfs_item_ptr(l, i, struct btrfs_extent_item);
 109                         printk("\t\textent data refs %u\n",
 110                                 btrfs_extent_refs(l, ei));
 111                         break;
 112                 case BTRFS_EXTENT_REF_KEY:
 113                         ref = btrfs_item_ptr(l, i, struct btrfs_extent_ref);
 114                         printk("\t\textent back ref root %llu gen %llu "
 115                                "owner %llu offset %llu\n",
 116                                (unsigned long long)btrfs_ref_root(l, ref),
 117                                (unsigned long long)btrfs_ref_generation(l, ref),
 118                                (unsigned long long)btrfs_ref_objectid(l, ref),
 119                                (unsigned long long)btrfs_ref_offset(l, ref));
 120                         break;
 121
 122                 case BTRFS_EXTENT_DATA_KEY:
 123                         fi = btrfs_item_ptr(l, i,
 124                                             struct btrfs_file_extent_item);
 125                         if (btrfs_file_extent_type(l, fi) ==
 126                             BTRFS_FILE_EXTENT_INLINE) {
 127                                 printk("\t\tinline extent data size %u\n",
 128                                    btrfs_file_extent_inline_len(l, item));
 129                                 break;
 130                         }
 131                         printk("\t\textent data disk bytenr %llu nr %llu\n",
 132                                (unsigned long long)btrfs_file_extent_disk_bytenr(l, fi),
 133                                (unsigned long long)btrfs_file_extent_disk_num_bytes(l, fi));
 134                         printk("\t\textent data offset %llu nr %llu\n",
 135                           (unsigned long long)btrfs_file_extent_offset(l, fi),
 136                           (unsigned long long)btrfs_file_extent_num_bytes(l, fi));
 137                         break;
 138                 case BTRFS_BLOCK_GROUP_ITEM_KEY:
 139                         bi = btrfs_item_ptr(l, i,
 140                                             struct btrfs_block_group_item);
 141                         printk("\t\tblock group used %llu\n",
 142                                (unsigned long long)btrfs_disk_block_group_used(l, bi));
 143                         break;
 144                 case BTRFS_CHUNK_ITEM_KEY:
 145                         print_chunk(l, btrfs_item_ptr(l, i, struct btrfs_chunk));
 146                         break;
 147                 case BTRFS_DEV_ITEM_KEY:
 148                         print_dev_item(l, btrfs_item_ptr(l, i,
 149                                         struct btrfs_dev_item));
 150                         break;
 151                 case BTRFS_DEV_EXTENT_KEY:
 152                         dev_extent = btrfs_item_ptr(l, i,
 153                                                     struct btrfs_dev_extent);
 154                         printk("\t\tdev extent owner %llu length %llu\n",
 155                                (unsigned long long)btrfs_dev_extent_owner(l, dev_extent),
 156                                (unsigned long long)btrfs_dev_extent_length(l, dev_extent));
 157                 };
 158         }
 159 }
 160
 161 void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *c)
 162 {
 163         int i;
 164         u32 nr;
 165         struct btrfs_key key;
 166         int level;
 167
 168         if (!c)
 169                 return;
 170         nr = btrfs_header_nritems(c);
 171         level = btrfs_header_level(c);
 172         if (level == 0) {
 173                 btrfs_print_leaf(root, c);
 174                 return;
 175         }
 176         printk("node %llu level %d total ptrs %d free spc %u\n",
 177                (unsigned long long)btrfs_header_bytenr(c),
 178                btrfs_header_level(c), nr,
 179                (u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr);
 180         for (i = 0; i < nr; i++) {
 181                 btrfs_node_key_to_cpu(c, &key, i);
 182                 printk("\tkey %d (%llu %u %llu) block %llu\n",
 183                        i,
 184                        (unsigned long long)key.objectid,
 185                        key.type,
 186                        (unsigned long long)key.offset,
 187                        (unsigned long long)btrfs_node_blockptr(c, i));
 188         }
 189         for (i = 0; i < nr; i++) {
 190                 struct extent_buffer *next = read_tree_block(root,
 191                                         btrfs_node_blockptr(c, i),
 192                                         btrfs_level_size(root, level - 1));
 193                 if (btrfs_is_leaf(next) &&
 194                     btrfs_header_level(c) != 1)
 195                         BUG();
 196                 if (btrfs_header_level(next) !=
 197                         btrfs_header_level(c) - 1)
 198                         BUG();
 199                 btrfs_print_tree(root, next);
 200                 free_extent_buffer(next);
 201         }
 202 }
 203