SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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         printk("\t\tdev item devid %llu "
  41                "total_bytes %llu bytes used %Lu\n",
  42                (unsigned long long)btrfs_device_id(eb, dev_item),
  43                (unsigned long long)btrfs_device_total_bytes(eb, dev_item),
  44                (unsigned long long)btrfs_device_bytes_used(eb, dev_item));
  45 }
  46 void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
  47 {
  48         int i;
  49         u32 nr = btrfs_header_nritems(l);
  50         struct btrfs_item *item;
  51         struct btrfs_extent_item *ei;
  52         struct btrfs_root_item *ri;
  53         struct btrfs_dir_item *di;
  54         struct btrfs_inode_item *ii;
  55         struct btrfs_block_group_item *bi;
  56         struct btrfs_file_extent_item *fi;
  57         struct btrfs_key key;
  58         struct btrfs_key found_key;
  59         struct btrfs_extent_ref *ref;
  60         struct btrfs_dev_extent *dev_extent;
  61         u32 type;
  62
  63         printk("leaf %llu total ptrs %d free space %d\n",
  64                 (unsigned long long)btrfs_header_bytenr(l), nr,
  65                 btrfs_leaf_free_space(root, l));
  66         for (i = 0 ; i < nr ; i++) {
  67                 item = btrfs_item_nr(l, i);
  68                 btrfs_item_key_to_cpu(l, &key, i);
  69                 type = btrfs_key_type(&key);
  70                 printk("\titem %d key (%llu %x %llu) itemoff %d itemsize %d\n",
  71                         i,
  72                         (unsigned long long)key.objectid, type,
  73                         (unsigned long long)key.offset,
  74                         btrfs_item_offset(l, item), btrfs_item_size(l, item));
  75                 switch (type) {
  76                 case BTRFS_INODE_ITEM_KEY:
  77                         ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
  78                         printk("\t\tinode generation %llu size %llu mode %o\n",
  79                               (unsigned long long)btrfs_inode_generation(l, ii),
  80                               (unsigned long long)btrfs_inode_size(l, ii),
  81                                btrfs_inode_mode(l, ii));
  82                         break;
  83                 case BTRFS_DIR_ITEM_KEY:
  84                         di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
  85                         btrfs_dir_item_key_to_cpu(l, di, &found_key);
  86                         printk("\t\tdir oid %llu type %u\n",
  87                                 (unsigned long long)found_key.objectid,
  88                                 btrfs_dir_type(l, di));
  89                         break;
  90                 case BTRFS_ROOT_ITEM_KEY:
  91                         ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
  92                         printk("\t\troot data bytenr %llu refs %u\n",
  93                                 (unsigned long long)btrfs_disk_root_bytenr(l, ri),
  94                                 btrfs_disk_root_refs(l, ri));
  95                         break;
  96                 case BTRFS_EXTENT_ITEM_KEY:
  97                         ei = btrfs_item_ptr(l, i, struct btrfs_extent_item);
  98                         printk("\t\textent data refs %u\n",
  99                                 btrfs_extent_refs(l, ei));
 100                         break;
 101                 case BTRFS_EXTENT_REF_KEY:
 102                         ref = btrfs_item_ptr(l, i, struct btrfs_extent_ref);
 103                         printk("\t\textent back ref root %llu gen %llu "
 104                                "owner %llu offset %llu\n",
 105                                (unsigned long long)btrfs_ref_root(l, ref),
 106                                (unsigned long long)btrfs_ref_generation(l, ref),
 107                                (unsigned long long)btrfs_ref_objectid(l, ref),
 108                                (unsigned long long)btrfs_ref_offset(l, ref));
 109                         break;
 110
 111                 case BTRFS_EXTENT_DATA_KEY:
 112                         fi = btrfs_item_ptr(l, i,
 113                                             struct btrfs_file_extent_item);
 114                         if (btrfs_file_extent_type(l, fi) ==
 115                             BTRFS_FILE_EXTENT_INLINE) {
 116                                 printk("\t\tinline extent data size %u\n",
 117                                    btrfs_file_extent_inline_len(l, item));
 118                                 break;
 119                         }
 120                         printk("\t\textent data disk bytenr %llu nr %llu\n",
 121                                (unsigned long long)btrfs_file_extent_disk_bytenr(l, fi),
 122                                (unsigned long long)btrfs_file_extent_disk_num_bytes(l, fi));
 123                         printk("\t\textent data offset %llu nr %llu\n",
 124                           (unsigned long long)btrfs_file_extent_offset(l, fi),
 125                           (unsigned long long)btrfs_file_extent_num_bytes(l, fi));
 126                         break;
 127                 case BTRFS_BLOCK_GROUP_ITEM_KEY:
 128                         bi = btrfs_item_ptr(l, i,
 129                                             struct btrfs_block_group_item);
 130                         printk("\t\tblock group used %llu\n",
 131                                (unsigned long long)btrfs_disk_block_group_used(l, bi));
 132                         break;
 133                 case BTRFS_CHUNK_ITEM_KEY:
 134                         print_chunk(l, btrfs_item_ptr(l, i, struct btrfs_chunk));
 135                         break;
 136                 case BTRFS_DEV_ITEM_KEY:
 137                         print_dev_item(l, btrfs_item_ptr(l, i,
 138                                         struct btrfs_dev_item));
 139                         break;
 140                 case BTRFS_DEV_EXTENT_KEY:
 141                         dev_extent = btrfs_item_ptr(l, i,
 142                                                     struct btrfs_dev_extent);
 143                         printk("\t\tdev extent owner %llu length %llu\n",
 144                                (unsigned long long)btrfs_dev_extent_owner(l, dev_extent),
 145                                (unsigned long long)btrfs_dev_extent_length(l, dev_extent));
 146                 };
 147         }
 148 }
 149
 150 void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *c)
 151 {
 152         int i;
 153         u32 nr;
 154         struct btrfs_key key;
 155         int level;
 156
 157         if (!c)
 158                 return;
 159         nr = btrfs_header_nritems(c);
 160         level = btrfs_header_level(c);
 161         if (level == 0) {
 162                 btrfs_print_leaf(root, c);
 163                 return;
 164         }
 165         printk("node %llu level %d total ptrs %d free spc %u\n",
 166                (unsigned long long)btrfs_header_bytenr(c),
 167                btrfs_header_level(c), nr,
 168                (u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr);
 169         for (i = 0; i < nr; i++) {
 170                 btrfs_node_key_to_cpu(c, &key, i);
 171                 printk("\tkey %d (%llu %u %llu) block %llu\n",
 172                        i,
 173                        (unsigned long long)key.objectid,
 174                        key.type,
 175                        (unsigned long long)key.offset,
 176                        (unsigned long long)btrfs_node_blockptr(c, i));
 177         }
 178         for (i = 0; i < nr; i++) {
 179                 struct extent_buffer *next = read_tree_block(root,
 180                                         btrfs_node_blockptr(c, i),
 181                                         btrfs_level_size(root, level - 1));
 182                 if (btrfs_is_leaf(next) &&
 183                     btrfs_header_level(c) != 1)
 184                         BUG();
 185                 if (btrfs_header_level(next) !=
 186                         btrfs_header_level(c) - 1)
 187                         BUG();
 188                 btrfs_print_tree(root, next);
 189                 free_extent_buffer(next);
 190         }
 191 }
 192