fs/btrfs/print-tree.c

   1 #include <linux/module.h>
   2 #include "ctree.h"
   3 #include "disk-io.h"
   4 #include "print-tree.h"
   5
   6 void btrfs_print_leaf(struct btrfs_root *root, struct btrfs_leaf *l)
   7 {
   8         int i;
   9         u32 nr = btrfs_header_nritems(&l->header);
  10         struct btrfs_item *item;
  11         struct btrfs_extent_item *ei;
  12         struct btrfs_root_item *ri;
  13         struct btrfs_dir_item *di;
  14         struct btrfs_inode_item *ii;
  15         struct btrfs_block_group_item *bi;
  16         u32 type;
  17
  18         printk("leaf %llu total ptrs %d free space %d\n",
  19                 (unsigned long long)btrfs_header_blocknr(&l->header), nr,
  20                 btrfs_leaf_free_space(root, l));
  21         for (i = 0 ; i < nr ; i++) {
  22                 item = l->items + i;
  23                 type = btrfs_disk_key_type(&item->key);
  24                 printk("\titem %d key (%llu %x %llu) itemoff %d itemsize %d\n",
  25                         i,
  26                         (unsigned long long)btrfs_disk_key_objectid(&item->key),
  27                         btrfs_disk_key_flags(&item->key),
  28                         (unsigned long long)btrfs_disk_key_offset(&item->key),
  29                         btrfs_item_offset(item),
  30                         btrfs_item_size(item));
  31                 switch (type) {
  32                 case BTRFS_INODE_ITEM_KEY:
  33                         ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
  34                         printk("\t\tinode generation %llu size %llu mode %o\n",
  35                                (unsigned long long)btrfs_inode_generation(ii),
  36                                (unsigned long long)btrfs_inode_size(ii),
  37                                btrfs_inode_mode(ii));
  38                         break;
  39                 case BTRFS_DIR_ITEM_KEY:
  40                         di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
  41                         printk("\t\tdir oid %llu flags %u type %u\n",
  42                                 (unsigned long long)btrfs_disk_key_objectid(
  43                                                             &di->location),
  44                                 btrfs_dir_flags(di),
  45                                 btrfs_dir_type(di));
  46                         printk("\t\tname %.*s\n",
  47                                btrfs_dir_name_len(di),(char *)(di + 1));
  48                         break;
  49                 case BTRFS_ROOT_ITEM_KEY:
  50                         ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
  51                         printk("\t\troot data blocknr %llu refs %u\n",
  52                                 (unsigned long long)btrfs_root_blocknr(ri),
  53                                 btrfs_root_refs(ri));
  54                         break;
  55                 case BTRFS_EXTENT_ITEM_KEY:
  56                         ei = btrfs_item_ptr(l, i, struct btrfs_extent_item);
  57                         printk("\t\textent data refs %u\n",
  58                                 btrfs_extent_refs(ei));
  59                         break;
  60                 case BTRFS_BLOCK_GROUP_ITEM_KEY:
  61                         bi = btrfs_item_ptr(l, i,
  62                                             struct btrfs_block_group_item);
  63                         printk("\t\tblock group used %llu\n",
  64                                (unsigned long long)btrfs_block_group_used(bi));
  65                         break;
  66                 case BTRFS_STRING_ITEM_KEY:
  67                         printk("\t\titem data %.*s\n", btrfs_item_size(item),
  68                                 btrfs_leaf_data(l) + btrfs_item_offset(item));
  69                         break;
  70                 };
  71         }
  72 }
  73
  74 void btrfs_print_tree(struct btrfs_root *root, struct buffer_head *t)
  75 {
  76         int i;
  77         u32 nr;
  78         struct btrfs_node *c;
  79
  80         if (!t)
  81                 return;
  82         c = btrfs_buffer_node(t);
  83         nr = btrfs_header_nritems(&c->header);
  84         if (btrfs_is_leaf(c)) {
  85                 btrfs_print_leaf(root, (struct btrfs_leaf *)c);
  86                 return;
  87         }
  88         printk("node %llu level %d total ptrs %d free spc %u\n",
  89                (unsigned long long)btrfs_header_blocknr(&c->header),
  90                btrfs_header_level(&c->header), nr,
  91                (u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr);
  92         for (i = 0; i < nr; i++) {
  93                 printk("\tkey %d (%llu %u %llu) block %llu\n",
  94                        i,
  95                        (unsigned long long)c->ptrs[i].key.objectid,
  96                        c->ptrs[i].key.flags,
  97                        (unsigned long long)c->ptrs[i].key.offset,
  98                        (unsigned long long)btrfs_node_blockptr(c, i));
  99         }
 100         for (i = 0; i < nr; i++) {
 101                 struct buffer_head *next_buf = read_tree_block(root,
 102                                                 btrfs_node_blockptr(c, i));
 103                 struct btrfs_node *next = btrfs_buffer_node(next_buf);
 104                 if (btrfs_is_leaf(next) &&
 105                     btrfs_header_level(&c->header) != 1)
 106                         BUG();
 107                 if (btrfs_header_level(&next->header) !=
 108                         btrfs_header_level(&c->header) - 1)
 109                         BUG();
 110                 btrfs_print_tree(root, next_buf);
 111                 btrfs_block_release(root, next_buf);
 112         }
 113 }
 114