print-tree.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include "kerncompat.h"
   4 #include "radix-tree.h"
   5 #include "ctree.h"
   6 #include "disk-io.h"
   7
   8 void btrfs_print_leaf(struct btrfs_root *root, struct btrfs_leaf *l)
   9 {
  10         int i;
  11         u32 nr = btrfs_header_nritems(&l->header);
  12         struct btrfs_item *item;
  13         struct btrfs_extent_item *ei;
  14         struct btrfs_root_item *ri;
  15         struct btrfs_dir_item *di;
  16         struct btrfs_inode_map_item *mi;
  17         struct btrfs_inode_item *ii;
  18         struct btrfs_file_extent_item *fi;
  19         u32 type;
  20
  21         printf("leaf %Lu ptrs %d free space %d parent %Lu generation %Lu\n",
  22                 btrfs_header_blocknr(&l->header), nr,
  23                 btrfs_leaf_free_space(root, l),
  24                 btrfs_header_parentid(&l->header),
  25                 btrfs_header_generation(&l->header));
  26         fflush(stdout);
  27         for (i = 0 ; i < nr ; i++) {
  28                 item = l->items + i;
  29                 type = btrfs_disk_key_type(&item->key);
  30                 printf("\titem %d key (%Lu %u %Lu) itemoff %d itemsize %d\n",
  31                         i,
  32                         btrfs_disk_key_objectid(&item->key),
  33                         btrfs_disk_key_flags(&item->key),
  34                         btrfs_disk_key_offset(&item->key),
  35                         btrfs_item_offset(item),
  36                         btrfs_item_size(item));
  37                 switch (type) {
  38                 case BTRFS_INODE_ITEM_KEY:
  39                         ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
  40                         printf("\t\tinode generation %Lu size %Lu mode %o\n",
  41                                btrfs_inode_generation(ii),
  42                                btrfs_inode_size(ii),
  43                                btrfs_inode_mode(ii));
  44                         break;
  45                 case BTRFS_DIR_ITEM_KEY:
  46                         di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
  47                         printf("\t\tdir oid %Lu flags %u type %u\n",
  48                                 btrfs_dir_objectid(di),
  49                                 btrfs_dir_flags(di),
  50                                 btrfs_dir_type(di));
  51                         printf("\t\tname %.*s\n",
  52                                btrfs_dir_name_len(di),(char *)(di + 1));
  53                         break;
  54                 case BTRFS_ROOT_ITEM_KEY:
  55                         ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
  56                         printf("\t\troot data blocknr %Lu refs %u\n",
  57                                 btrfs_root_blocknr(ri), btrfs_root_refs(ri));
  58                         break;
  59                 case BTRFS_EXTENT_ITEM_KEY:
  60                         ei = btrfs_item_ptr(l, i, struct btrfs_extent_item);
  61                         printf("\t\textent data refs %u owner %Lu\n",
  62                                 btrfs_extent_refs(ei), btrfs_extent_owner(ei));
  63                         break;
  64                 case BTRFS_INODE_MAP_ITEM_KEY:
  65                         mi = btrfs_item_ptr(l, i, struct btrfs_inode_map_item);
  66                         printf("\t\tinode map key %Lu %u %Lu\n",
  67                                btrfs_disk_key_objectid(&mi->key),
  68                                btrfs_disk_key_flags(&mi->key),
  69                                btrfs_disk_key_offset(&mi->key));
  70                         break;
  71                 case BTRFS_EXTENT_DATA_KEY:
  72                         fi = btrfs_item_ptr(l, i,
  73                                             struct btrfs_file_extent_item);
  74                         printf("\t\textent data disk block %Lu nr %Lu\n",
  75                                btrfs_file_extent_disk_blocknr(fi),
  76                                btrfs_file_extent_disk_num_blocks(fi));
  77                         printf("\t\textent data offset %Lu nr %Lu\n",
  78                                btrfs_file_extent_offset(fi),
  79                                btrfs_file_extent_num_blocks(fi));
  80                         break;
  81                 case BTRFS_STRING_ITEM_KEY:
  82                         printf("\t\titem data %.*s\n", btrfs_item_size(item),
  83                                 btrfs_leaf_data(l) + btrfs_item_offset(item));
  84                         break;
  85                 };
  86                 fflush(stdout);
  87         }
  88 }
  89 void btrfs_print_tree(struct btrfs_root *root, struct btrfs_buffer *t)
  90 {
  91         int i;
  92         u32 nr;
  93         struct btrfs_node *c;
  94
  95         if (!t)
  96                 return;
  97         c = &t->node;
  98         nr = btrfs_header_nritems(&c->header);
  99         if (btrfs_is_leaf(c)) {
 100                 btrfs_print_leaf(root, (struct btrfs_leaf *)c);
 101                 return;
 102         }
 103         printf("node %Lu level %d ptrs %d free %u parent %Lu generation %Lu\n",
 104                t->blocknr,
 105                 btrfs_header_level(&c->header), nr,
 106                 (u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr,
 107                 btrfs_header_parentid(&c->header),
 108                 btrfs_header_generation(&c->header));
 109         fflush(stdout);
 110         for (i = 0; i < nr; i++) {
 111                 printf("\tkey %d (%Lu %u %Lu) block %Lu\n",
 112                        i,
 113                        c->ptrs[i].key.objectid,
 114                        c->ptrs[i].key.flags,
 115                        c->ptrs[i].key.offset,
 116                        btrfs_node_blockptr(c, i));
 117                 fflush(stdout);
 118         }
 119         for (i = 0; i < nr; i++) {
 120                 struct btrfs_buffer *next_buf = read_tree_block(root,
 121                                                 btrfs_node_blockptr(c, i));
 122                 struct btrfs_node *next = &next_buf->node;
 123                 if (btrfs_is_leaf(next) &&
 124                     btrfs_header_level(&c->header) != 1)
 125                         BUG();
 126                 if (btrfs_header_level(&next->header) !=
 127                         btrfs_header_level(&c->header) - 1)
 128                         BUG();
 129                 btrfs_print_tree(root, next_buf);
 130                 btrfs_block_release(root, next_buf);
 131         }
 132 }
 133