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         u32 type;
  17         u32 namelen;
  18
  19         printf("leaf %Lu total ptrs %d free space %d\n",
  20                 btrfs_header_blocknr(&l->header), nr,
  21                 btrfs_leaf_free_space(root, l));
  22         fflush(stdout);
  23         for (i = 0 ; i < nr ; i++) {
  24                 item = l->items + i;
  25                 type = btrfs_disk_key_type(&item->key);
  26                 printf("\titem %d key (%Lu %u %Lu) itemoff %d itemsize %d\n",
  27                         i,
  28                         btrfs_disk_key_objectid(&item->key),
  29                         btrfs_disk_key_flags(&item->key),
  30                         btrfs_disk_key_offset(&item->key),
  31                         btrfs_item_offset(item),
  32                         btrfs_item_size(item));
  33                 switch (type) {
  34                 case BTRFS_INODE_ITEM_KEY:
  35                         break;
  36                 case BTRFS_DIR_ITEM_KEY:
  37                         namelen = btrfs_item_size(l->items + i) - sizeof(*di);
  38                         di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
  39                         printf("\t\tdir oid %Lu flags %u type %u\n",
  40                                 btrfs_dir_objectid(di),
  41                                 btrfs_dir_flags(di),
  42                                 btrfs_dir_type(di));
  43                         printf("\t\tname %.*s\n",
  44                                 namelen, (char *)(di + 1));
  45
  46                         break;
  47                 case BTRFS_ROOT_ITEM_KEY:
  48                         ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
  49                         printf("\t\troot data blocknr %Lu refs %u\n",
  50                                 btrfs_root_blocknr(ri), btrfs_root_refs(ri));
  51                         break;
  52                 case BTRFS_EXTENT_ITEM_KEY:
  53                         ei = btrfs_item_ptr(l, i, struct btrfs_extent_item);
  54                         printf("\t\textent data refs %u owner %Lu\n",
  55                                 btrfs_extent_refs(ei), btrfs_extent_owner(ei));
  56                         break;
  57                 case BTRFS_STRING_ITEM_KEY:
  58                         printf("\t\titem data %.*s\n", btrfs_item_size(item),
  59                                 btrfs_leaf_data(l) + btrfs_item_offset(item));
  60                         break;
  61                 };
  62                 fflush(stdout);
  63         }
  64 }
  65 void btrfs_print_tree(struct btrfs_root *root, struct btrfs_buffer *t)
  66 {
  67         int i;
  68         u32 nr;
  69         struct btrfs_node *c;
  70
  71         if (!t)
  72                 return;
  73         c = &t->node;
  74         nr = btrfs_header_nritems(&c->header);
  75         if (btrfs_is_leaf(c)) {
  76                 btrfs_print_leaf(root, (struct btrfs_leaf *)c);
  77                 return;
  78         }
  79         printf("node %Lu level %d total ptrs %d free spc %u\n", t->blocknr,
  80                 btrfs_header_level(&c->header), nr,
  81                 (u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr);
  82         fflush(stdout);
  83         for (i = 0; i < nr; i++) {
  84                 printf("\tkey %d (%Lu %u %Lu) block %Lu\n",
  85                        i,
  86                        c->ptrs[i].key.objectid,
  87                        c->ptrs[i].key.flags,
  88                        c->ptrs[i].key.offset,
  89                        btrfs_node_blockptr(c, i));
  90                 fflush(stdout);
  91         }
  92         for (i = 0; i < nr; i++) {
  93                 struct btrfs_buffer *next_buf = read_tree_block(root,
  94                                                 btrfs_node_blockptr(c, i));
  95                 struct btrfs_node *next = &next_buf->node;
  96                 if (btrfs_is_leaf(next) &&
  97                     btrfs_header_level(&c->header) != 1)
  98                         BUG();
  99                 if (btrfs_header_level(&next->header) !=
 100                         btrfs_header_level(&c->header) - 1)
 101                         BUG();
 102                 btrfs_print_tree(root, next_buf);
 103                 btrfs_block_release(root, next_buf);
 104         }
 105 }
 106