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(KERN_INFO "\t\tchunk length %llu owner %llu type %llu "
  28                "num_stripes %d\n",
  29                (unsigned long long)btrfs_chunk_length(eb, chunk),
  30                (unsigned long long)btrfs_chunk_owner(eb, chunk),
  31                (unsigned long long)btrfs_chunk_type(eb, chunk),
  32                num_stripes);
  33         for (i = 0 ; i < num_stripes ; i++) {
  34                 printk(KERN_INFO "\t\t\tstripe %d devid %llu offset %llu\n", i,
  35                       (unsigned long long)btrfs_stripe_devid_nr(eb, chunk, i),
  36                       (unsigned long long)btrfs_stripe_offset_nr(eb, chunk, i));
  37         }
  38 }
  39 static void print_dev_item(struct extent_buffer *eb,
  40                            struct btrfs_dev_item *dev_item)
  41 {
  42         printk(KERN_INFO "\t\tdev item devid %llu "
  43                "total_bytes %llu bytes used %llu\n",
  44                (unsigned long long)btrfs_device_id(eb, dev_item),
  45                (unsigned long long)btrfs_device_total_bytes(eb, dev_item),
  46                (unsigned long long)btrfs_device_bytes_used(eb, dev_item));
  47 }
  48 void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
  49 {
  50         int i;
  51         u32 nr = btrfs_header_nritems(l);
  52         struct btrfs_item *item;
  53         struct btrfs_extent_item *ei;
  54         struct btrfs_root_item *ri;
  55         struct btrfs_dir_item *di;
  56         struct btrfs_inode_item *ii;
  57         struct btrfs_block_group_item *bi;
  58         struct btrfs_file_extent_item *fi;
  59         struct btrfs_key key;
  60         struct btrfs_key found_key;
  61         struct btrfs_extent_ref *ref;
  62         struct btrfs_dev_extent *dev_extent;
  63         u32 type;
  64
  65         printk(KERN_INFO "leaf %llu total ptrs %d free space %d\n",
  66                 (unsigned long long)btrfs_header_bytenr(l), nr,
  67                 btrfs_leaf_free_space(root, l));
  68         for (i = 0 ; i < nr ; i++) {
  69                 item = btrfs_item_nr(l, i);
  70                 btrfs_item_key_to_cpu(l, &key, i);
  71                 type = btrfs_key_type(&key);
  72                 printk(KERN_INFO "\titem %d key (%llu %x %llu) itemoff %d "
  73                        "itemsize %d\n",
  74                         i,
  75                         (unsigned long long)key.objectid, type,
  76                         (unsigned long long)key.offset,
  77                         btrfs_item_offset(l, item), btrfs_item_size(l, item));
  78                 switch (type) {
  79                 case BTRFS_INODE_ITEM_KEY:
  80                         ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
  81                         printk(KERN_INFO "\t\tinode generation %llu size %llu "
  82                                "mode %o\n",
  83                                (unsigned long long)
  84                                btrfs_inode_generation(l, ii),
  85                               (unsigned long long)btrfs_inode_size(l, ii),
  86                                btrfs_inode_mode(l, ii));
  87                         break;
  88                 case BTRFS_DIR_ITEM_KEY:
  89                         di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
  90                         btrfs_dir_item_key_to_cpu(l, di, &found_key);
  91                         printk(KERN_INFO "\t\tdir oid %llu type %u\n",
  92                                 (unsigned long long)found_key.objectid,
  93                                 btrfs_dir_type(l, di));
  94                         break;
  95                 case BTRFS_ROOT_ITEM_KEY:
  96                         ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
  97                         printk(KERN_INFO "\t\troot data bytenr %llu refs %u\n",
  98                                 (unsigned long long)
  99                                 btrfs_disk_root_bytenr(l, ri),
 100                                 btrfs_disk_root_refs(l, ri));
 101                         break;
 102                 case BTRFS_EXTENT_ITEM_KEY:
 103                         ei = btrfs_item_ptr(l, i, struct btrfs_extent_item);
 104                         printk(KERN_INFO "\t\textent data refs %u\n",
 105                                 btrfs_extent_refs(l, ei));
 106                         break;
 107                 case BTRFS_EXTENT_REF_KEY:
 108                         ref = btrfs_item_ptr(l, i, struct btrfs_extent_ref);
 109                         printk(KERN_INFO "\t\textent back ref root %llu "
 110                                "gen %llu owner %llu num_refs %lu\n",
 111                                (unsigned long long)btrfs_ref_root(l, ref),
 112                                (unsigned long long)btrfs_ref_generation(l, ref),
 113                                (unsigned long long)btrfs_ref_objectid(l, ref),
 114                                (unsigned long)btrfs_ref_num_refs(l, ref));
 115                         break;
 116
 117                 case BTRFS_EXTENT_DATA_KEY:
 118                         fi = btrfs_item_ptr(l, i,
 119                                             struct btrfs_file_extent_item);
 120                         if (btrfs_file_extent_type(l, fi) ==
 121                             BTRFS_FILE_EXTENT_INLINE) {
 122                                 printk(KERN_INFO "\t\tinline extent data "
 123                                        "size %u\n",
 124                                        btrfs_file_extent_inline_len(l, fi));
 125                                 break;
 126                         }
 127                         printk(KERN_INFO "\t\textent data disk bytenr %llu "
 128                                "nr %llu\n",
 129                                (unsigned long long)
 130                                btrfs_file_extent_disk_bytenr(l, fi),
 131                                (unsigned long long)
 132                                btrfs_file_extent_disk_num_bytes(l, fi));
 133                         printk(KERN_INFO "\t\textent data offset %llu "
 134                                "nr %llu ram %llu\n",
 135                                (unsigned long long)
 136                                btrfs_file_extent_offset(l, fi),
 137                                (unsigned long long)
 138                                btrfs_file_extent_num_bytes(l, fi),
 139                                (unsigned long long)
 140                                btrfs_file_extent_ram_bytes(l, fi));
 141                         break;
 142                 case BTRFS_BLOCK_GROUP_ITEM_KEY:
 143                         bi = btrfs_item_ptr(l, i,
 144                                             struct btrfs_block_group_item);
 145                         printk(KERN_INFO "\t\tblock group used %llu\n",
 146                                (unsigned long long)
 147                                btrfs_disk_block_group_used(l, bi));
 148                         break;
 149                 case BTRFS_CHUNK_ITEM_KEY:
 150                         print_chunk(l, btrfs_item_ptr(l, i,
 151                                                       struct btrfs_chunk));
 152                         break;
 153                 case BTRFS_DEV_ITEM_KEY:
 154                         print_dev_item(l, btrfs_item_ptr(l, i,
 155                                         struct btrfs_dev_item));
 156                         break;
 157                 case BTRFS_DEV_EXTENT_KEY:
 158                         dev_extent = btrfs_item_ptr(l, i,
 159                                                     struct btrfs_dev_extent);
 160                         printk(KERN_INFO "\t\tdev extent chunk_tree %llu\n"
 161                                "\t\tchunk objectid %llu chunk offset %llu "
 162                                "length %llu\n",
 163                                (unsigned long long)
 164                                btrfs_dev_extent_chunk_tree(l, dev_extent),
 165                                (unsigned long long)
 166                                btrfs_dev_extent_chunk_objectid(l, dev_extent),
 167                                (unsigned long long)
 168                                btrfs_dev_extent_chunk_offset(l, dev_extent),
 169                                (unsigned long long)
 170                                btrfs_dev_extent_length(l, dev_extent));
 171                 };
 172         }
 173 }
 174
 175 void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *c)
 176 {
 177         int i; u32 nr;
 178         struct btrfs_key key;
 179         int level;
 180
 181         if (!c)
 182                 return;
 183         nr = btrfs_header_nritems(c);
 184         level = btrfs_header_level(c);
 185         if (level == 0) {
 186                 btrfs_print_leaf(root, c);
 187                 return;
 188         }
 189         printk(KERN_INFO "node %llu level %d total ptrs %d free spc %u\n",
 190                (unsigned long long)btrfs_header_bytenr(c),
 191                btrfs_header_level(c), nr,
 192                (u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr);
 193         for (i = 0; i < nr; i++) {
 194                 btrfs_node_key_to_cpu(c, &key, i);
 195                 printk(KERN_INFO "\tkey %d (%llu %u %llu) block %llu\n",
 196                        i,
 197                        (unsigned long long)key.objectid,
 198                        key.type,
 199                        (unsigned long long)key.offset,
 200                        (unsigned long long)btrfs_node_blockptr(c, i));
 201         }
 202         for (i = 0; i < nr; i++) {
 203                 struct extent_buffer *next = read_tree_block(root,
 204                                         btrfs_node_blockptr(c, i),
 205                                         btrfs_level_size(root, level - 1),
 206                                         btrfs_node_ptr_generation(c, i));
 207                 if (btrfs_is_leaf(next) &&
 208                     btrfs_header_level(c) != 1)
 209                         BUG();
 210                 if (btrfs_header_level(next) !=
 211                         btrfs_header_level(c) - 1)
 212                         BUG();
 213                 btrfs_print_tree(root, next);
 214                 free_extent_buffer(next);
 215         }
 216 }