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 <stdio.h>
  20 #include <stdlib.h>
  21 #include "kerncompat.h"
  22 #include "radix-tree.h"
  23 #include "ctree.h"
  24 #include "disk-io.h"
  25
  26 static int print_dir_item(struct btrfs_item *item,
  27                           struct btrfs_dir_item *di)
  28 {
  29         u32 total;
  30         u32 cur = 0;
  31         u32 len;
  32         total = btrfs_item_size(item);
  33         while(cur < total) {
  34                 printf("\t\tdir index %llu flags %u type %u\n",
  35                      (unsigned long long)btrfs_disk_key_objectid(&di->location),
  36                      btrfs_dir_flags(di),
  37                      btrfs_dir_type(di));
  38                 printf("\t\tname %.*s\n",
  39                        btrfs_dir_name_len(di),(char *)(di + 1));
  40                 len = sizeof(*di) + btrfs_dir_name_len(di);
  41                 di = (struct btrfs_dir_item *)((char *)di + len);
  42                 cur += len;
  43         }
  44         return 0;
  45 }
  46 void btrfs_print_leaf(struct btrfs_root *root, struct btrfs_leaf *l)
  47 {
  48         int i;
  49         u32 nr = btrfs_header_nritems(&l->header);
  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_file_extent_item *fi;
  56         struct btrfs_csum_item *ci;
  57         struct btrfs_block_group_item *bi;
  58         u32 type;
  59
  60         printf("leaf %llu ptrs %d free space %d generation %llu owner %llu\n",
  61                 (unsigned long long)btrfs_header_bytenr(&l->header), nr,
  62                 btrfs_leaf_free_space(root, l),
  63                 (unsigned long long)btrfs_header_generation(&l->header),
  64                 (unsigned long long)btrfs_header_owner(&l->header));
  65         fflush(stdout);
  66         for (i = 0 ; i < nr ; i++) {
  67                 item = l->items + i;
  68                 type = btrfs_disk_key_type(&item->key);
  69                 printf("\titem %d key (%llu %x %llu) itemoff %d itemsize %d\n",
  70                         i,
  71                         (unsigned long long)btrfs_disk_key_objectid(&item->key),
  72                         btrfs_disk_key_type(&item->key),
  73                         (unsigned long long)btrfs_disk_key_offset(&item->key),
  74                         btrfs_item_offset(item),
  75                         btrfs_item_size(item));
  76                 switch (type) {
  77                 case BTRFS_INODE_ITEM_KEY:
  78                         ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
  79                         printf("\t\tinode generation %llu size %llu block group %llu mode %o links %u\n",
  80                                (unsigned long long)btrfs_inode_generation(ii),
  81                                (unsigned long long)btrfs_inode_size(ii),
  82                                (unsigned long long)btrfs_inode_block_group(ii),
  83                                btrfs_inode_mode(ii),
  84                                btrfs_inode_nlink(ii));
  85                         break;
  86                 case BTRFS_DIR_ITEM_KEY:
  87                         di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
  88                         print_dir_item(l->items + i, di);
  89                         break;
  90                 case BTRFS_DIR_INDEX_KEY:
  91                         di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
  92                         print_dir_item(l->items + i, di);
  93                         break;
  94                 case BTRFS_ROOT_ITEM_KEY:
  95                         ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
  96                         printf("\t\troot data bytenr %llu level %d dirid %llu refs %u\n",
  97                                 (unsigned long long)btrfs_root_bytenr(ri),
  98                                 ri->level,
  99                                 (unsigned long long)btrfs_root_dirid(ri),
 100                                 btrfs_root_refs(ri));
 101                         if (1 || btrfs_root_refs(ri) == 0) {
 102                                 struct btrfs_key drop_key;
 103                                 btrfs_disk_key_to_cpu(&drop_key,
 104                                                       &ri->drop_progress);
 105                                 printf("\t\tdrop key %Lu %x %Lu level %d\n",
 106                                        (unsigned long long)drop_key.objectid,
 107                                        drop_key.type,
 108                                        (unsigned long long)drop_key.offset,
 109                                        ri->drop_level);
 110                         }
 111                         break;
 112                 case BTRFS_EXTENT_ITEM_KEY:
 113                         ei = btrfs_item_ptr(l, i, struct btrfs_extent_item);
 114                         printf("\t\textent data refs %u owner %llu\n",
 115                                 btrfs_extent_refs(ei),
 116                                 (unsigned long long)btrfs_extent_owner(ei));
 117                         break;
 118                 case BTRFS_CSUM_ITEM_KEY:
 119                         ci = btrfs_item_ptr(l, i,
 120                                             struct btrfs_csum_item);
 121                         printf("\t\tcsum item\n");
 122                         break;
 123                 case BTRFS_EXTENT_DATA_KEY:
 124                         fi = btrfs_item_ptr(l, i,
 125                                             struct btrfs_file_extent_item);
 126                         if (btrfs_file_extent_type(fi) ==
 127                             BTRFS_FILE_EXTENT_INLINE) {
 128                                 printf("\t\tinline extent data size %u\n",
 129                                    btrfs_file_extent_inline_len(l->items + i));
 130                                 break;
 131                         }
 132                         printf("\t\textent data disk byte %llu nr %llu\n",
 133                                (unsigned long long)btrfs_file_extent_disk_bytenr(fi),
 134                                (unsigned long long)btrfs_file_extent_disk_num_bytes(fi));
 135                         printf("\t\textent data offset %llu nr %llu\n",
 136                           (unsigned long long)btrfs_file_extent_offset(fi),
 137                           (unsigned long long)btrfs_file_extent_num_bytes(fi));
 138                         break;
 139                 case BTRFS_BLOCK_GROUP_ITEM_KEY:
 140                         bi = btrfs_item_ptr(l, i,
 141                                             struct btrfs_block_group_item);
 142                         printf("\t\tblock group used %llu flags %x\n",
 143                                (unsigned long long)btrfs_block_group_used(bi),
 144                                bi->flags);
 145                         break;
 146                 case BTRFS_STRING_ITEM_KEY:
 147                         printf("\t\titem data %.*s\n", btrfs_item_size(item),
 148                                 btrfs_leaf_data(l) + btrfs_item_offset(item));
 149                         break;
 150                 };
 151                 fflush(stdout);
 152         }
 153 }
 154 void btrfs_print_tree(struct btrfs_root *root, struct btrfs_buffer *t)
 155 {
 156         int i;
 157         u32 nr;
 158         struct btrfs_node *c;
 159         u32 size;
 160
 161         if (!t)
 162                 return;
 163         c = &t->node;
 164         nr = btrfs_header_nritems(&c->header);
 165         if (btrfs_is_leaf(c)) {
 166                 btrfs_print_leaf(root, (struct btrfs_leaf *)c);
 167                 return;
 168         }
 169         printf("node %llu level %d ptrs %d free %u generation %llu owner %llu\n",
 170                (unsigned long long)t->bytenr,
 171                 btrfs_header_level(&c->header), nr,
 172                 (u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr,
 173                 (unsigned long long)btrfs_header_generation(&c->header),
 174                 (unsigned long long)btrfs_header_owner(&c->header));
 175         fflush(stdout);
 176         size = btrfs_level_size(root, btrfs_header_level(&c->header) - 1);
 177         for (i = 0; i < nr; i++) {
 178                 u64 blocknr = btrfs_node_blockptr(c, i);
 179                 printf("\tkey %d (%llu %x %llu) block %llu (%llu)\n",
 180                        i,
 181                        (unsigned long long)c->ptrs[i].key.objectid,
 182                        c->ptrs[i].key.type,
 183                        (unsigned long long)c->ptrs[i].key.offset,
 184                        (unsigned long long)blocknr,
 185                        (unsigned long long)blocknr / size);
 186                 fflush(stdout);
 187         }
 188         for (i = 0; i < nr; i++) {
 189                 struct btrfs_buffer *next_buf = read_tree_block(root,
 190                                                 btrfs_node_blockptr(c, i),
 191                                                 size);
 192                 struct btrfs_node *next = &next_buf->node;
 193                 if (btrfs_is_leaf(next) &&
 194                     btrfs_header_level(&c->header) != 1)
 195                         BUG();
 196                 if (btrfs_header_level(&next->header) !=
 197                         btrfs_header_level(&c->header) - 1)
 198                         BUG();
 199                 btrfs_print_tree(root, next_buf);
 200                 btrfs_block_release(root, next_buf);
 201         }
 202 }
 203