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 static int print_dir_item(struct btrfs_item *item,
   9                           struct btrfs_dir_item *di)
  10 {
  11         u32 total;
  12         u32 cur = 0;
  13         u32 len;
  14         total = btrfs_item_size(item);
  15         while(cur < total) {
  16                 printf("\t\tdir index %Lu flags %u type %u\n",
  17                         btrfs_disk_key_objectid(&di->location),
  18                         btrfs_dir_flags(di),
  19                         btrfs_dir_type(di));
  20                 printf("\t\tname %.*s\n",
  21                        btrfs_dir_name_len(di),(char *)(di + 1));
  22                 len = sizeof(*di) + btrfs_dir_name_len(di);
  23                 di = (struct btrfs_dir_item *)((char *)di + len);
  24                 cur += len;
  25         }
  26         return 0;
  27 }
  28 void btrfs_print_leaf(struct btrfs_root *root, struct btrfs_leaf *l)
  29 {
  30         int i;
  31         u32 nr = btrfs_header_nritems(&l->header);
  32         struct btrfs_item *item;
  33         struct btrfs_extent_item *ei;
  34         struct btrfs_root_item *ri;
  35         struct btrfs_dir_item *di;
  36         struct btrfs_inode_item *ii;
  37         struct btrfs_file_extent_item *fi;
  38         struct btrfs_csum_item *ci;
  39         struct btrfs_block_group_item *bi;
  40         u32 type;
  41
  42         printf("leaf %Lu ptrs %d free space %d generation %Lu owner %Lu\n",
  43                 btrfs_header_blocknr(&l->header), nr,
  44                 btrfs_leaf_free_space(root, l),
  45                 btrfs_header_generation(&l->header),
  46                 btrfs_header_owner(&l->header));
  47         fflush(stdout);
  48         for (i = 0 ; i < nr ; i++) {
  49                 item = l->items + i;
  50                 type = btrfs_disk_key_type(&item->key);
  51                 printf("\titem %d key (%Lu %x %Lu) itemoff %d itemsize %d\n",
  52                         i,
  53                         btrfs_disk_key_objectid(&item->key),
  54                         btrfs_disk_key_flags(&item->key),
  55                         btrfs_disk_key_offset(&item->key),
  56                         btrfs_item_offset(item),
  57                         btrfs_item_size(item));
  58                 switch (type) {
  59                 case BTRFS_INODE_ITEM_KEY:
  60                         ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
  61                         printf("\t\tinode generation %Lu size %Lu block group %Lu mode %o\n",
  62                                btrfs_inode_generation(ii),
  63                                btrfs_inode_size(ii),
  64                                btrfs_inode_block_group(ii),
  65                                btrfs_inode_mode(ii));
  66                         break;
  67                 case BTRFS_DIR_ITEM_KEY:
  68                         di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
  69                         print_dir_item(l->items + i, di);
  70                         break;
  71                 case BTRFS_DIR_INDEX_KEY:
  72                         di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
  73                         print_dir_item(l->items + i, di);
  74                         break;
  75                 case BTRFS_ROOT_ITEM_KEY:
  76                         ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
  77                         printf("\t\troot data blocknr %Lu dirid %Lu refs %u\n",
  78                                 btrfs_root_blocknr(ri),
  79                                 btrfs_root_dirid(ri),
  80                                 btrfs_root_refs(ri));
  81                         break;
  82                 case BTRFS_EXTENT_ITEM_KEY:
  83                         ei = btrfs_item_ptr(l, i, struct btrfs_extent_item);
  84                         printf("\t\textent data refs %u owner %Lu\n",
  85                                 btrfs_extent_refs(ei),
  86                                 btrfs_extent_owner(ei));
  87                         break;
  88                 case BTRFS_CSUM_ITEM_KEY:
  89                         ci = btrfs_item_ptr(l, i,
  90                                             struct btrfs_csum_item);
  91                         printf("\t\tcsum item\n");
  92                         break;
  93                 case BTRFS_EXTENT_DATA_KEY:
  94                         fi = btrfs_item_ptr(l, i,
  95                                             struct btrfs_file_extent_item);
  96                         if (btrfs_file_extent_type(fi) ==
  97                             BTRFS_FILE_EXTENT_INLINE) {
  98                                 printf("\t\tinline extent data size %u\n",
  99                                    btrfs_file_extent_inline_len(l->items + i));
 100                                 break;
 101                         }
 102                         printf("\t\textent data disk block %Lu nr %Lu\n",
 103                                btrfs_file_extent_disk_blocknr(fi),
 104                                btrfs_file_extent_disk_num_blocks(fi));
 105                         printf("\t\textent data offset %Lu nr %Lu\n",
 106                                btrfs_file_extent_offset(fi),
 107                                btrfs_file_extent_num_blocks(fi));
 108                         break;
 109                 case BTRFS_BLOCK_GROUP_ITEM_KEY:
 110                         bi = btrfs_item_ptr(l, i,
 111                                             struct btrfs_block_group_item);
 112                         printf("\t\tblock group used %Lu flags %x\n",
 113                                btrfs_block_group_used(bi), bi->flags);
 114                         break;
 115                 case BTRFS_STRING_ITEM_KEY:
 116                         printf("\t\titem data %.*s\n", btrfs_item_size(item),
 117                                 btrfs_leaf_data(l) + btrfs_item_offset(item));
 118                         break;
 119                 };
 120                 fflush(stdout);
 121         }
 122 }
 123 void btrfs_print_tree(struct btrfs_root *root, struct btrfs_buffer *t)
 124 {
 125         int i;
 126         u32 nr;
 127         struct btrfs_node *c;
 128
 129         if (!t)
 130                 return;
 131         c = &t->node;
 132         nr = btrfs_header_nritems(&c->header);
 133         if (btrfs_is_leaf(c)) {
 134                 btrfs_print_leaf(root, (struct btrfs_leaf *)c);
 135                 return;
 136         }
 137         printf("node %Lu level %d ptrs %d free %u generation %Lu owner %Lu\n",
 138                t->blocknr,
 139                 btrfs_header_level(&c->header), nr,
 140                 (u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr,
 141                 btrfs_header_generation(&c->header),
 142                 btrfs_header_owner(&c->header));
 143         fflush(stdout);
 144         for (i = 0; i < nr; i++) {
 145                 printf("\tkey %d (%Lu %x %Lu) block %Lu\n",
 146                        i,
 147                        c->ptrs[i].key.objectid,
 148                        c->ptrs[i].key.flags,
 149                        c->ptrs[i].key.offset,
 150                        btrfs_node_blockptr(c, i));
 151                 fflush(stdout);
 152         }
 153         for (i = 0; i < nr; i++) {
 154                 struct btrfs_buffer *next_buf = read_tree_block(root,
 155                                                 btrfs_node_blockptr(c, i));
 156                 struct btrfs_node *next = &next_buf->node;
 157                 if (btrfs_is_leaf(next) &&
 158                     btrfs_header_level(&c->header) != 1)
 159                         BUG();
 160                 if (btrfs_header_level(&next->header) !=
 161                         btrfs_header_level(&c->header) - 1)
 162                         BUG();
 163                 btrfs_print_tree(root, next_buf);
 164                 btrfs_block_release(root, next_buf);
 165         }
 166 }
 167