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_device_item *devi;
  37         struct btrfs_inode_item *ii;
  38         struct btrfs_file_extent_item *fi;
  39         struct btrfs_csum_item *ci;
  40         char *p;
  41         u32 type;
  42
  43         printf("leaf %Lu ptrs %d free space %d generation %Lu owner %Lu\n",
  44                 btrfs_header_blocknr(&l->header), nr,
  45                 btrfs_leaf_free_space(root, l),
  46                 btrfs_header_generation(&l->header),
  47                 btrfs_header_owner(&l->header));
  48         fflush(stdout);
  49         for (i = 0 ; i < nr ; i++) {
  50                 item = l->items + i;
  51                 type = btrfs_disk_key_type(&item->key);
  52                 printf("\titem %d key (%Lu %x %Lu) itemoff %d itemsize %d\n",
  53                         i,
  54                         btrfs_disk_key_objectid(&item->key),
  55                         btrfs_disk_key_flags(&item->key),
  56                         btrfs_disk_key_offset(&item->key),
  57                         btrfs_item_offset(item),
  58                         btrfs_item_size(item));
  59                 switch (type) {
  60                 case BTRFS_INODE_ITEM_KEY:
  61                         ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
  62                         printf("\t\tinode generation %Lu size %Lu mode %o\n",
  63                                btrfs_inode_generation(ii),
  64                                btrfs_inode_size(ii),
  65                                btrfs_inode_mode(ii));
  66                         break;
  67                 case BTRFS_INLINE_DATA_KEY:
  68                         p = btrfs_item_ptr(l, i, char);
  69                         printf("\t\tinline data %.*s\n", 10, p);
  70                         break;
  71                 case BTRFS_DIR_ITEM_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_DIR_INDEX_KEY:
  76                         di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
  77                         print_dir_item(l->items + i, di);
  78                         break;
  79                 case BTRFS_ROOT_ITEM_KEY:
  80                         ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
  81                         printf("\t\troot data blocknr %Lu dirid %Lu refs %u\n",
  82                                 btrfs_root_blocknr(ri),
  83                                 btrfs_root_dirid(ri),
  84                                 btrfs_root_refs(ri));
  85                         break;
  86                 case BTRFS_EXTENT_ITEM_KEY:
  87                         ei = btrfs_item_ptr(l, i, struct btrfs_extent_item);
  88                         printf("\t\textent data refs %u owner %Lu\n",
  89                                 btrfs_extent_refs(ei),
  90                                 btrfs_extent_owner(ei));
  91                         break;
  92                 case BTRFS_CSUM_ITEM_KEY:
  93                         ci = btrfs_item_ptr(l, i,
  94                                             struct btrfs_csum_item);
  95                         printf("\t\tcsum item\n");
  96                         break;
  97                 case BTRFS_EXTENT_DATA_KEY:
  98                         fi = btrfs_item_ptr(l, i,
  99                                             struct btrfs_file_extent_item);
 100                         if (btrfs_file_extent_type(fi) ==
 101                             BTRFS_FILE_EXTENT_INLINE) {
 102                                 printf("\t\tinline extent data size %u\n",
 103                                    btrfs_file_extent_inline_len(l->items + i));
 104                                 break;
 105                         }
 106                         printf("\t\textent data disk block %Lu nr %Lu\n",
 107                                btrfs_file_extent_disk_blocknr(fi),
 108                                btrfs_file_extent_disk_num_blocks(fi));
 109                         printf("\t\textent data offset %Lu nr %Lu\n",
 110                                btrfs_file_extent_offset(fi),
 111                                btrfs_file_extent_num_blocks(fi));
 112                         break;
 113                 case BTRFS_DEV_ITEM_KEY:
 114                         devi = btrfs_item_ptr(l, i, struct btrfs_device_item);
 115                         printf("\t\tdev id %Lu namelen %u name %.*s\n",
 116                                btrfs_device_id(devi),
 117                                 btrfs_device_pathlen(devi),
 118                                 btrfs_device_pathlen(devi),
 119                                 (char *)(devi + 1));
 120                         break;
 121                 case BTRFS_STRING_ITEM_KEY:
 122                         printf("\t\titem data %.*s\n", btrfs_item_size(item),
 123                                 btrfs_leaf_data(l) + btrfs_item_offset(item));
 124                         break;
 125                 };
 126                 fflush(stdout);
 127         }
 128 }
 129 void btrfs_print_tree(struct btrfs_root *root, struct btrfs_buffer *t)
 130 {
 131         int i;
 132         u32 nr;
 133         struct btrfs_node *c;
 134
 135         if (!t)
 136                 return;
 137         c = &t->node;
 138         nr = btrfs_header_nritems(&c->header);
 139         if (btrfs_is_leaf(c)) {
 140                 btrfs_print_leaf(root, (struct btrfs_leaf *)c);
 141                 return;
 142         }
 143         printf("node %Lu level %d ptrs %d free %u generation %Lu owner %Lu\n",
 144                t->blocknr,
 145                 btrfs_header_level(&c->header), nr,
 146                 (u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr,
 147                 btrfs_header_generation(&c->header),
 148                 btrfs_header_owner(&c->header));
 149         fflush(stdout);
 150         for (i = 0; i < nr; i++) {
 151                 printf("\tkey %d (%Lu %x %Lu) block %Lu\n",
 152                        i,
 153                        c->ptrs[i].key.objectid,
 154                        c->ptrs[i].key.flags,
 155                        c->ptrs[i].key.offset,
 156                        btrfs_node_blockptr(c, i));
 157                 fflush(stdout);
 158         }
 159         for (i = 0; i < nr; i++) {
 160                 struct btrfs_buffer *next_buf = read_tree_block(root,
 161                                                 btrfs_node_blockptr(c, i));
 162                 struct btrfs_node *next = &next_buf->node;
 163                 if (btrfs_is_leaf(next) &&
 164                     btrfs_header_level(&c->header) != 1)
 165                         BUG();
 166                 if (btrfs_header_level(&next->header) !=
 167                         btrfs_header_level(&c->header) - 1)
 168                         BUG();
 169                 btrfs_print_tree(root, next_buf);
 170                 btrfs_block_release(root, next_buf);
 171         }
 172 }
 173