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