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print-tree.c

/*
 * Copyright (C) 2007 Oracle.  All rights reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public
 * License v2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 021110-1307, USA.
 */

#include <stdio.h>
#include <stdlib.h>
#include <uuid/uuid.h>
#include "kerncompat.h"
#include "radix-tree.h"
#include "ctree.h"
#include "disk-io.h"
#include "print-tree.h"

static int print_dir_item(struct extent_buffer *eb, struct btrfs_item *item,
                    struct btrfs_dir_item *di)
{
      u32 total;
      u32 cur = 0;
      u32 len;
      u32 name_len;
      u32 data_len;
      char namebuf[BTRFS_NAME_LEN];
      struct btrfs_disk_key location;

      total = btrfs_item_size(eb, item);
      while(cur < total) {
            btrfs_dir_item_key(eb, di, &location);
            printf("\t\tlocation ");
            btrfs_print_key(&location);
            printf(" type %u\n", btrfs_dir_type(eb, di));
            name_len = btrfs_dir_name_len(eb, di);
            data_len = btrfs_dir_data_len(eb, di);
            len = (name_len <= sizeof(namebuf))? name_len: sizeof(namebuf);
            read_extent_buffer(eb, namebuf, (unsigned long)(di + 1), len);
            printf("\t\tnamelen %u datalen %u name: %.*s\n",
                   name_len, data_len, len, namebuf);
            len = sizeof(*di) + name_len + data_len;
            di = (struct btrfs_dir_item *)((char *)di + len);
            cur += len;
      }
      return 0;
}

static int print_inode_ref_item(struct extent_buffer *eb, struct btrfs_item *item,
                        struct btrfs_inode_ref *ref)
{
      u32 total;
      u32 cur = 0;
      u32 len;
      u32 name_len;
      u64 index;
      char namebuf[BTRFS_NAME_LEN];
      total = btrfs_item_size(eb, item);
      while(cur < total) {
            name_len = btrfs_inode_ref_name_len(eb, ref);
            index = btrfs_inode_ref_index(eb, ref);
            len = (name_len <= sizeof(namebuf))? name_len: sizeof(namebuf);
            read_extent_buffer(eb, namebuf, (unsigned long)(ref + 1), len);
            printf("\t\tinode ref index %llu namelen %u name: %.*s\n",
                   (unsigned long long)index, name_len, len, namebuf);
            len = sizeof(*ref) + name_len;
            ref = (struct btrfs_inode_ref *)((char *)ref + len);
            cur += len;
      }
      return 0;
}

static void print_chunk(struct extent_buffer *eb, struct btrfs_chunk *chunk)
{
      int num_stripes = btrfs_chunk_num_stripes(eb, chunk);
      int i;
      printf("\t\tchunk length %llu owner %llu type %llu num_stripes %d\n",
             (unsigned long long)btrfs_chunk_length(eb, chunk),
             (unsigned long long)btrfs_chunk_owner(eb, chunk),
             (unsigned long long)btrfs_chunk_type(eb, chunk),
             num_stripes);
      for (i = 0 ; i < num_stripes ; i++) {
            printf("\t\t\tstripe %d devid %llu offset %llu\n", i,
                  (unsigned long long)btrfs_stripe_devid_nr(eb, chunk, i),
                  (unsigned long long)btrfs_stripe_offset_nr(eb, chunk, i));
      }
}
static void print_dev_item(struct extent_buffer *eb,
                     struct btrfs_dev_item *dev_item)
{
      printf("\t\tdev item devid %llu "
             "total_bytes %llu bytes used %Lu\n",
             (unsigned long long)btrfs_device_id(eb, dev_item),
             (unsigned long long)btrfs_device_total_bytes(eb, dev_item),
             (unsigned long long)btrfs_device_bytes_used(eb, dev_item));
}

static void print_uuids(struct extent_buffer *eb)
{
      char fs_uuid[37];
      char chunk_uuid[37];
      u8 disk_uuid[BTRFS_UUID_SIZE];

      read_extent_buffer(eb, disk_uuid, (unsigned long)btrfs_header_fsid(eb),
                     BTRFS_FSID_SIZE);

      fs_uuid[36] = '\0';
      uuid_unparse(disk_uuid, fs_uuid);

      read_extent_buffer(eb, disk_uuid,
                     (unsigned long)btrfs_header_chunk_tree_uuid(eb),
                     BTRFS_UUID_SIZE);

      chunk_uuid[36] = '\0';
      uuid_unparse(disk_uuid, chunk_uuid);
      printf("fs uuid %s\nchunk uuid %s\n", fs_uuid, chunk_uuid);
}

static void print_file_extent_item(struct extent_buffer *eb,
                           struct btrfs_item *item,
                           struct btrfs_file_extent_item *fi)
{
      int extent_type = btrfs_file_extent_type(eb, fi);

      if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
            printf("\t\tinline extent data size %u "
                   "ram %u compress %d\n",
              btrfs_file_extent_inline_item_len(eb, item),
              btrfs_file_extent_inline_len(eb, fi),
              btrfs_file_extent_compression(eb, fi));
            return;
      }
      if (extent_type == BTRFS_FILE_EXTENT_PREALLOC) {
            printf("\t\tprealloc data disk byte %llu nr %llu\n",
              (unsigned long long)btrfs_file_extent_disk_bytenr(eb, fi),
              (unsigned long long)btrfs_file_extent_disk_num_bytes(eb, fi));
            printf("\t\tprealloc data offset %llu nr %llu\n",
              (unsigned long long)btrfs_file_extent_offset(eb, fi),
              (unsigned long long)btrfs_file_extent_num_bytes(eb, fi));
            return;
      }
      printf("\t\textent data disk byte %llu nr %llu\n",
            (unsigned long long)btrfs_file_extent_disk_bytenr(eb, fi),
            (unsigned long long)btrfs_file_extent_disk_num_bytes(eb, fi));
      printf("\t\textent data offset %llu nr %llu ram %llu\n",
            (unsigned long long)btrfs_file_extent_offset(eb, fi),
            (unsigned long long)btrfs_file_extent_num_bytes(eb, fi),
            (unsigned long long)btrfs_file_extent_ram_bytes(eb, fi));
      printf("\t\textent compression %d\n",
             btrfs_file_extent_compression(eb, fi));
}

static void print_extent_item(struct extent_buffer *eb, int slot)
{
      struct btrfs_extent_item *ei;
      struct btrfs_extent_inline_ref *iref;
      struct btrfs_extent_data_ref *dref;
      struct btrfs_shared_data_ref *sref;
      struct btrfs_disk_key key;
      unsigned long end;
      unsigned long ptr;
      int type;
      u32 item_size = btrfs_item_size_nr(eb, slot);
      u64 flags;
      u64 offset;

      if (item_size < sizeof(*ei)) {
#ifdef BTRFS_COMPAT_EXTENT_TREE_V0
            struct btrfs_extent_item_v0 *ei0;
            BUG_ON(item_size != sizeof(*ei0));
            ei0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_item_v0);
            printf("\t\textent refs %u\n",
                   btrfs_extent_refs_v0(eb, ei0));
            return;
#else
            BUG();
#endif
      }

      ei = btrfs_item_ptr(eb, slot, struct btrfs_extent_item);
      flags = btrfs_extent_flags(eb, ei);

      printf("\t\textent refs %llu gen %llu flags %llu\n",
             (unsigned long long)btrfs_extent_refs(eb, ei),
             (unsigned long long)btrfs_extent_generation(eb, ei),
             (unsigned long long)flags);

      if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) {
            struct btrfs_tree_block_info *info;
            info = (struct btrfs_tree_block_info *)(ei + 1);
            btrfs_tree_block_key(eb, info, &key);
            printf("\t\ttree block key (%llu %x %llu) level %d\n",
                   (unsigned long long)btrfs_disk_key_objectid(&key),
                   key.type,
                   (unsigned long long)btrfs_disk_key_offset(&key),
                   btrfs_tree_block_level(eb, info));
            iref = (struct btrfs_extent_inline_ref *)(info + 1);
      } else {
            iref = (struct btrfs_extent_inline_ref *)(ei + 1);
      }

      ptr = (unsigned long)iref;
      end = (unsigned long)ei + item_size;
      while (ptr < end) {
            iref = (struct btrfs_extent_inline_ref *)ptr;
            type = btrfs_extent_inline_ref_type(eb, iref);
            offset = btrfs_extent_inline_ref_offset(eb, iref);
            switch (type) {
            case BTRFS_TREE_BLOCK_REF_KEY:
                  printf("\t\ttree block backref root %llu\n",
                         (unsigned long long)offset);
                  break;
            case BTRFS_SHARED_BLOCK_REF_KEY:
                  printf("\t\tshared block backref parent %llu\n",
                         (unsigned long long)offset);
                  break;
            case BTRFS_EXTENT_DATA_REF_KEY:
                  dref = (struct btrfs_extent_data_ref *)(&iref->offset);
                  printf("\t\textent data backref root %llu "
                         "objectid %llu offset %llu count %u\n",
                         (unsigned long long)btrfs_extent_data_ref_root(eb, dref),
                         (unsigned long long)btrfs_extent_data_ref_objectid(eb, dref),
                         (unsigned long long)btrfs_extent_data_ref_offset(eb, dref),
                         btrfs_extent_data_ref_count(eb, dref));
                  break;
            case BTRFS_SHARED_DATA_REF_KEY:
                  sref = (struct btrfs_shared_data_ref *)(iref + 1);
                  printf("\t\tshared data backref parent %llu count %u\n",
                         (unsigned long long)offset,
                         btrfs_shared_data_ref_count(eb, sref));
                  break;
            default:
                  BUG();
            }
            ptr += btrfs_extent_inline_ref_size(type);
      }
      WARN_ON(ptr > end);
}

#ifdef BTRFS_COMPAT_EXTENT_TREE_V0
static void print_extent_ref_v0(struct extent_buffer *eb, int slot)
{
      struct btrfs_extent_ref_v0 *ref0;

      ref0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_ref_v0);
      printf("\t\textent back ref root %llu gen %llu "
            "owner %llu num_refs %lu\n",
            (unsigned long long)btrfs_ref_root_v0(eb, ref0),
            (unsigned long long)btrfs_ref_generation_v0(eb, ref0),
            (unsigned long long)btrfs_ref_objectid_v0(eb, ref0),
            (unsigned long)btrfs_ref_count_v0(eb, ref0));
}
#endif

static void print_root_ref(struct extent_buffer *leaf, int slot, char *tag)
{
      struct btrfs_root_ref *ref;
      char namebuf[BTRFS_NAME_LEN];
      int namelen;

      ref = btrfs_item_ptr(leaf, slot, struct btrfs_root_ref);
      namelen = btrfs_root_ref_name_len(leaf, ref);
      read_extent_buffer(leaf, namebuf, (unsigned long)(ref + 1), namelen);
      printf("\t\troot %s key dirid %llu sequence %llu name %.*s\n", tag,
             (unsigned long long)btrfs_root_ref_dirid(leaf, ref),
             (unsigned long long)btrfs_root_ref_sequence(leaf, ref),
             namelen, namebuf);
}

static void print_key_type(u8 type)
{
      switch (type) {
      case BTRFS_INODE_ITEM_KEY:
            printf("INODE_ITEM");
            break;
      case BTRFS_INODE_REF_KEY:
            printf("INODE_REF");
            break;
      case BTRFS_DIR_ITEM_KEY:
            printf("DIR_ITEM");
            break;
      case BTRFS_DIR_INDEX_KEY:
            printf("DIR_INDEX");
            break;
      case BTRFS_DIR_LOG_ITEM_KEY:
            printf("DIR_LOG_ITEM");
            break;
      case BTRFS_DIR_LOG_INDEX_KEY:
            printf("DIR_LOG_INDEX");
            break;
      case BTRFS_XATTR_ITEM_KEY:
            printf("XATTR_ITEM");
            break;
      case BTRFS_ORPHAN_ITEM_KEY:
            printf("ORPHAN_ITEM");
            break;
      case BTRFS_ROOT_ITEM_KEY:
            printf("ROOT_ITEM");
            break;
      case BTRFS_ROOT_REF_KEY:
            printf("ROOT_REF");
            break;
      case BTRFS_ROOT_BACKREF_KEY:
            printf("ROOT_BACKREF");
            break;
      case BTRFS_EXTENT_ITEM_KEY:
            printf("EXTENT_ITEM");
            break;
      case BTRFS_TREE_BLOCK_REF_KEY:
            printf("TREE_BLOCK_REF");
            break;
      case BTRFS_SHARED_BLOCK_REF_KEY:
            printf("SHARED_BLOCK_REF");
            break;
      case BTRFS_EXTENT_DATA_REF_KEY:
            printf("EXTENT_DATA_REF");
            break;
      case BTRFS_SHARED_DATA_REF_KEY:
            printf("SHARED_DATA_REF");
            break;
      case BTRFS_EXTENT_REF_V0_KEY:
            printf("EXTENT_REF_V0");
            break;
      case BTRFS_CSUM_ITEM_KEY:
            printf("CSUM_ITEM");
            break;
      case BTRFS_EXTENT_CSUM_KEY:
            printf("EXTENT_CSUM");
            break;
      case BTRFS_EXTENT_DATA_KEY:
            printf("EXTENT_DATA");
            break;
      case BTRFS_BLOCK_GROUP_ITEM_KEY:
            printf("BLOCK_GROUP_ITEM");
            break;
      case BTRFS_CHUNK_ITEM_KEY:
            printf("CHUNK_ITEM");
            break;
      case BTRFS_DEV_ITEM_KEY:
            printf("DEV_ITEM");
            break;
      case BTRFS_DEV_EXTENT_KEY:
            printf("DEV_EXTENT");
            break;
      case BTRFS_STRING_ITEM_KEY:
            printf("STRING_ITEM");
            break;
      default:
            printf("UNKNOWN");
      };
}

static void print_objectid(unsigned long long objectid, u8 type)
{
      if (type == BTRFS_DEV_EXTENT_KEY) {
            printf("%llu", objectid); /* device id */
            return;
      }

      switch (objectid) {
      case BTRFS_ROOT_TREE_OBJECTID:
            if (type == BTRFS_DEV_ITEM_KEY)
                  printf("DEV_ITEMS");
            else
                  printf("ROOT_TREE");
            break;
      case BTRFS_EXTENT_TREE_OBJECTID:
            printf("EXTENT_TREE");
            break;
      case BTRFS_CHUNK_TREE_OBJECTID:
            printf("CHUNK_TREE");
            break;
      case BTRFS_DEV_TREE_OBJECTID:
            printf("DEV_TREE");
            break;
      case BTRFS_FS_TREE_OBJECTID:
            printf("FS_TREE");
            break;
      case BTRFS_ROOT_TREE_DIR_OBJECTID:
            printf("ROOT_TREE_DIR");
            break;
      case BTRFS_CSUM_TREE_OBJECTID:
            printf("CSUM_TREE");
            break;
      case BTRFS_ORPHAN_OBJECTID:
            printf("ORPHAN");
            break;
      case BTRFS_TREE_LOG_OBJECTID:
            printf("TREE_LOG");
            break;
      case BTRFS_TREE_LOG_FIXUP_OBJECTID:
            printf("LOG_FIXUP");
            break;
      case BTRFS_TREE_RELOC_OBJECTID:
            printf("TREE_RELOC");
            break;
      case BTRFS_DATA_RELOC_TREE_OBJECTID:
            printf("DATA_RELOC_TREE");
            break;
      case BTRFS_EXTENT_CSUM_OBJECTID:
            printf("EXTENT_CSUM");
            break;
      case BTRFS_MULTIPLE_OBJECTIDS:
            printf("MULTIPLE");
            break;
      case BTRFS_FIRST_CHUNK_TREE_OBJECTID:
            printf("FIRST_CHUNK_TREE");
            break;
      default:
            printf("%llu", objectid);
      }
}

void btrfs_print_key(struct btrfs_disk_key *disk_key)
{
      u8 type;
      printf("key (");
      type = btrfs_disk_key_type(disk_key);
      print_objectid((unsigned long long)btrfs_disk_key_objectid(disk_key),
            type);
      printf(" ");
      print_key_type(type);
      printf(" %llu)", (unsigned long long)btrfs_disk_key_offset(disk_key));
}

void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
{
      int i;
      char *str;
      struct btrfs_item *item;
      struct btrfs_root_item *ri;
      struct btrfs_dir_item *di;
      struct btrfs_inode_item *ii;
      struct btrfs_file_extent_item *fi;
      struct btrfs_csum_item *ci;
      struct btrfs_block_group_item *bi;
      struct btrfs_extent_data_ref *dref;
      struct btrfs_shared_data_ref *sref;
      struct btrfs_inode_ref *iref;
      struct btrfs_dev_extent *dev_extent;
      struct btrfs_disk_key disk_key;
      struct btrfs_root_item root_item;
      struct btrfs_block_group_item bg_item;
      struct btrfs_dir_log_item *dlog;
      u32 nr = btrfs_header_nritems(l);
      u32 type;

      printf("leaf %llu items %d free space %d generation %llu owner %llu\n",
            (unsigned long long)btrfs_header_bytenr(l), nr,
            btrfs_leaf_free_space(root, l),
            (unsigned long long)btrfs_header_generation(l),
            (unsigned long long)btrfs_header_owner(l));
      print_uuids(l);
      fflush(stdout);
      for (i = 0 ; i < nr ; i++) {
            item = btrfs_item_nr(l, i);
            btrfs_item_key(l, &disk_key, i);
            type = btrfs_disk_key_type(&disk_key);
            printf("\titem %d ", i);
            btrfs_print_key(&disk_key);
            printf(" itemoff %d itemsize %d\n",
                  btrfs_item_offset(l, item),
                  btrfs_item_size(l, item));
            switch (type) {
            case BTRFS_INODE_ITEM_KEY:
                  ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
                  printf("\t\tinode generation %llu size %llu block group %llu mode %o links %u\n",
                         (unsigned long long)btrfs_inode_generation(l, ii),
                         (unsigned long long)btrfs_inode_size(l, ii),
                         (unsigned long long)btrfs_inode_block_group(l,ii),
                         btrfs_inode_mode(l, ii),
                         btrfs_inode_nlink(l, ii));
                  break;
            case BTRFS_INODE_REF_KEY:
                  iref = btrfs_item_ptr(l, i, struct btrfs_inode_ref);
                  print_inode_ref_item(l, item, iref);
                  break;
            case BTRFS_DIR_ITEM_KEY:
            case BTRFS_DIR_INDEX_KEY:
            case BTRFS_XATTR_ITEM_KEY:
                  di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
                  print_dir_item(l, item, di);
                  break;
            case BTRFS_DIR_LOG_INDEX_KEY:
            case BTRFS_DIR_LOG_ITEM_KEY:
                  dlog = btrfs_item_ptr(l, i, struct btrfs_dir_log_item);
                  printf("\t\tdir log end %Lu\n",
                         btrfs_dir_log_end(l, dlog));
                   break;
            case BTRFS_ORPHAN_ITEM_KEY:
                  printf("\t\torphan item\n");
                  break;
            case BTRFS_ROOT_ITEM_KEY:
                  ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
                  read_extent_buffer(l, &root_item, (unsigned long)ri, sizeof(root_item));
                  printf("\t\troot data bytenr %llu level %d dirid %llu refs %u\n",
                        (unsigned long long)btrfs_root_bytenr(&root_item),
                        btrfs_root_level(&root_item),
                        (unsigned long long)btrfs_root_dirid(&root_item),
                        btrfs_root_refs(&root_item));
                  if (btrfs_root_refs(&root_item) == 0) {
                        struct btrfs_key drop_key;
                        btrfs_disk_key_to_cpu(&drop_key,
                                          &root_item.drop_progress);
                        printf("\t\tdrop ");
                        btrfs_print_key(&root_item.drop_progress);
                        printf(" level %d\n", root_item.drop_level);
                  }
                  break;
            case BTRFS_ROOT_REF_KEY:
                  print_root_ref(l, i, "ref");
                  break;
            case BTRFS_ROOT_BACKREF_KEY:
                  print_root_ref(l, i, "backref");
                  break;
            case BTRFS_EXTENT_ITEM_KEY:
                  print_extent_item(l, i);
                  break;
            case BTRFS_TREE_BLOCK_REF_KEY:
                  printf("\t\ttree block backref\n");
                  break;
            case BTRFS_SHARED_BLOCK_REF_KEY:
                  printf("\t\tshared block backref\n");
                  break;
            case BTRFS_EXTENT_DATA_REF_KEY:
                  dref = btrfs_item_ptr(l, i, struct btrfs_extent_data_ref);
                  printf("\t\textent data backref root %llu "
                         "objectid %llu offset %llu count %u\n",
                         (unsigned long long)btrfs_extent_data_ref_root(l, dref),
                         (unsigned long long)btrfs_extent_data_ref_objectid(l, dref),
                         (unsigned long long)btrfs_extent_data_ref_offset(l, dref),
                         btrfs_extent_data_ref_count(l, dref));
                  break;
            case BTRFS_SHARED_DATA_REF_KEY:
                  sref = btrfs_item_ptr(l, i, struct btrfs_shared_data_ref);
                  printf("\t\tshared data backref count %u\n",
                         btrfs_shared_data_ref_count(l, sref));
                  break;
            case BTRFS_EXTENT_REF_V0_KEY:
#ifdef BTRFS_COMPAT_EXTENT_TREE_V0
                  print_extent_ref_v0(l, i);
#else
                  BUG();
#endif
                  break;
            case BTRFS_CSUM_ITEM_KEY:
                  ci = btrfs_item_ptr(l, i, struct btrfs_csum_item);
                  printf("\t\tcsum item\n");
                  break;
            case BTRFS_EXTENT_CSUM_KEY:
                  ci = btrfs_item_ptr(l, i, struct btrfs_csum_item);
                  printf("\t\textent csum item\n");
                  break;
            case BTRFS_EXTENT_DATA_KEY:
                  fi = btrfs_item_ptr(l, i,
                                  struct btrfs_file_extent_item);
                  print_file_extent_item(l, item, fi);
                  break;
            case BTRFS_BLOCK_GROUP_ITEM_KEY:
                  bi = btrfs_item_ptr(l, i,
                                  struct btrfs_block_group_item);
                  read_extent_buffer(l, &bg_item, (unsigned long)bi,
                                 sizeof(bg_item));
                  printf("\t\tblock group used %llu chunk_objectid %llu flags %llu\n",
                         (unsigned long long)btrfs_block_group_used(&bg_item),
                         (unsigned long long)btrfs_block_group_chunk_objectid(&bg_item),
                         (unsigned long long)btrfs_block_group_flags(&bg_item));
                  break;
            case BTRFS_CHUNK_ITEM_KEY:
                  print_chunk(l, btrfs_item_ptr(l, i, struct btrfs_chunk));
                  break;
            case BTRFS_DEV_ITEM_KEY:
                  print_dev_item(l, btrfs_item_ptr(l, i,
                              struct btrfs_dev_item));
                  break;
            case BTRFS_DEV_EXTENT_KEY:
                  dev_extent = btrfs_item_ptr(l, i,
                                        struct btrfs_dev_extent);
                  printf("\t\tdev extent chunk_tree %llu\n"
                         "\t\tchunk objectid %llu chunk offset %llu "
                         "length %llu\n",
                         (unsigned long long)
                         btrfs_dev_extent_chunk_tree(l, dev_extent),
                         (unsigned long long)
                         btrfs_dev_extent_chunk_objectid(l, dev_extent),
                         (unsigned long long)
                         btrfs_dev_extent_chunk_offset(l, dev_extent),
                         (unsigned long long)
                         btrfs_dev_extent_length(l, dev_extent));
                  break;
            case BTRFS_STRING_ITEM_KEY:
                  /* dirty, but it's simple */
                  str = l->data + btrfs_item_ptr_offset(l, i);
                  printf("\t\titem data %.*s\n", btrfs_item_size(l, item), str);
                  break;
            };
            fflush(stdout);
      }
}

void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *eb)
{
      int i;
      u32 nr;
      u32 size;
      struct btrfs_disk_key disk_key;
      struct btrfs_key key;

      if (!eb)
            return;
      nr = btrfs_header_nritems(eb);
      if (btrfs_is_leaf(eb)) {
            btrfs_print_leaf(root, eb);
            return;
      }
      printf("node %llu level %d items %d free %u generation %llu owner %llu\n",
             (unsigned long long)eb->start,
              btrfs_header_level(eb), nr,
            (u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr,
            (unsigned long long)btrfs_header_generation(eb),
            (unsigned long long)btrfs_header_owner(eb));
      print_uuids(eb);
      fflush(stdout);
      size = btrfs_level_size(root, btrfs_header_level(eb) - 1);
      for (i = 0; i < nr; i++) {
            u64 blocknr = btrfs_node_blockptr(eb, i);
            btrfs_node_key(eb, &disk_key, i);
            btrfs_disk_key_to_cpu(&key, &disk_key);
            printf("\t");
            btrfs_print_key(&disk_key);
            printf(" block %llu (%llu) gen %llu\n",
                   (unsigned long long)blocknr,
                   (unsigned long long)blocknr / size,
                   (unsigned long long)btrfs_node_ptr_generation(eb, i));
            fflush(stdout);
      }
      for (i = 0; i < nr; i++) {
            struct extent_buffer *next = read_tree_block(root,
                                   btrfs_node_blockptr(eb, i),
                                   size,
                                   btrfs_node_ptr_generation(eb, i));
            if (!next) {
                  fprintf(stderr, "failed to read %llu in tree %llu\n",
                        (unsigned long long)btrfs_node_blockptr(eb, i),
                        (unsigned long long)btrfs_header_owner(eb));
                  continue;
            }
            if (btrfs_is_leaf(next) &&
                btrfs_header_level(eb) != 1)
                  BUG();
            if (btrfs_header_level(next) !=
                  btrfs_header_level(eb) - 1)
                  BUG();
            btrfs_print_tree(root, next);
            free_extent_buffer(next);
      }
}


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