print-tree.c

   1 /*
   2  * Copyright (C) 2007 Oracle.  All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public
   6  * License v2 as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public
  14  * License along with this program; if not, write to the
  15  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  16  * Boston, MA 021110-1307, USA.
  17  */
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include "kerncompat.h"
  22 #include "radix-tree.h"
  23 #include "ctree.h"
  24 #include "disk-io.h"
  25
  26 static int print_dir_item(struct extent_buffer *eb, struct btrfs_item *item,
  27                           struct btrfs_dir_item *di)
  28 {
  29         u32 total;
  30         u32 cur = 0;
  31         u32 len;
  32         u32 name_len;
  33         u32 data_len;
  34         char namebuf[BTRFS_NAME_LEN];
  35         struct btrfs_disk_key location;
  36
  37         total = btrfs_item_size(eb, item);
  38         while(cur < total) {
  39                 btrfs_dir_item_key(eb, di, &location);
  40                 printf("\t\tdir index %llu type %u\n",
  41                        (unsigned long long)btrfs_disk_key_objectid(&location),
  42                        btrfs_dir_type(eb, di));
  43                 name_len = btrfs_dir_name_len(eb, di);
  44                 data_len = btrfs_dir_data_len(eb, di);
  45                 len = (name_len <= sizeof(namebuf))? name_len: sizeof(namebuf);
  46                 read_extent_buffer(eb, namebuf, (unsigned long)(di + 1), len);
  47                 printf("\t\tnamelen %u datalen %u name: %.*s\n",
  48                        name_len, data_len, len, namebuf);
  49                 len = sizeof(*di) + name_len + data_len;
  50                 di = (struct btrfs_dir_item *)((char *)di + len);
  51                 cur += len;
  52         }
  53         return 0;
  54 }
  55
  56 static int print_inode_ref_item(struct extent_buffer *eb, struct btrfs_item *item,
  57                                 struct btrfs_inode_ref *ref)
  58 {
  59         u32 total;
  60         u32 cur = 0;
  61         u32 len;
  62         u32 name_len;
  63         char namebuf[BTRFS_NAME_LEN];
  64         total = btrfs_item_size(eb, item);
  65         while(cur < total) {
  66                 name_len = btrfs_inode_ref_name_len(eb, ref);
  67                 len = (name_len <= sizeof(namebuf))? name_len: sizeof(namebuf);
  68                 read_extent_buffer(eb, namebuf, (unsigned long)(ref + 1), len);
  69                 printf("\t\tinode ref namelen %u name: %.*s\n",
  70                        name_len, len, namebuf);
  71                 len = sizeof(*ref) + name_len;
  72                 ref = (struct btrfs_inode_ref *)((char *)ref + len);
  73                 cur += len;
  74         }
  75         return 0;
  76 }
  77
  78 void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
  79 {
  80         int i;
  81         char *str;
  82         struct btrfs_item *item;
  83         struct btrfs_extent_item *ei;
  84         struct btrfs_root_item *ri;
  85         struct btrfs_dir_item *di;
  86         struct btrfs_inode_item *ii;
  87         struct btrfs_file_extent_item *fi;
  88         struct btrfs_csum_item *ci;
  89         struct btrfs_block_group_item *bi;
  90         struct btrfs_extent_ref *ref;
  91         struct btrfs_inode_ref *iref;
  92         struct btrfs_disk_key disk_key;
  93         struct btrfs_root_item root_item;
  94         struct btrfs_block_group_item bg_item;
  95         u32 nr = btrfs_header_nritems(l);
  96         u32 type;
  97
  98         printf("leaf %llu ptrs %d free space %d generation %llu owner %llu\n",
  99                 (unsigned long long)btrfs_header_bytenr(l), nr,
 100                 btrfs_leaf_free_space(root, l),
 101                 (unsigned long long)btrfs_header_generation(l),
 102                 (unsigned long long)btrfs_header_owner(l));
 103         fflush(stdout);
 104         for (i = 0 ; i < nr ; i++) {
 105                 item = btrfs_item_nr(l, i);
 106                 btrfs_item_key(l, &disk_key, i);
 107                 type = btrfs_disk_key_type(&disk_key);
 108                 printf("\titem %d key (%llu %x %llu) itemoff %d itemsize %d\n",
 109                         i,
 110                         (unsigned long long)btrfs_disk_key_objectid(&disk_key),
 111                         btrfs_disk_key_type(&disk_key),
 112                         (unsigned long long)btrfs_disk_key_offset(&disk_key),
 113                         btrfs_item_offset(l, item),
 114                         btrfs_item_size(l, item));
 115                 switch (type) {
 116                 case BTRFS_INODE_ITEM_KEY:
 117                         ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
 118                         printf("\t\tinode generation %llu size %llu block group %llu mode %o links %u\n",
 119                                (unsigned long long)btrfs_inode_generation(l, ii),
 120                                (unsigned long long)btrfs_inode_size(l, ii),
 121                                (unsigned long long)btrfs_inode_block_group(l,ii),
 122                                btrfs_inode_mode(l, ii),
 123                                btrfs_inode_nlink(l, ii));
 124                         break;
 125                 case BTRFS_INODE_REF_KEY:
 126                         iref = btrfs_item_ptr(l, i, struct btrfs_inode_ref);
 127                         print_inode_ref_item(l, item, iref);
 128                         break;
 129                 case BTRFS_DIR_ITEM_KEY:
 130                 case BTRFS_DIR_INDEX_KEY:
 131                 case BTRFS_XATTR_ITEM_KEY:
 132                         di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
 133                         print_dir_item(l, item, di);
 134                         break;
 135                 case BTRFS_ROOT_ITEM_KEY:
 136                         ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
 137                         read_extent_buffer(l, &root_item, (unsigned long)ri, sizeof(root_item));
 138                         printf("\t\troot data bytenr %llu level %d dirid %llu refs %u\n",
 139                                 (unsigned long long)btrfs_root_bytenr(&root_item),
 140                                 btrfs_root_level(&root_item),
 141                                 (unsigned long long)btrfs_root_dirid(&root_item),
 142                                 btrfs_root_refs(&root_item));
 143                         if (1 || btrfs_root_refs(&root_item) == 0) {
 144                                 struct btrfs_key drop_key;
 145                                 btrfs_disk_key_to_cpu(&drop_key,
 146                                                       &root_item.drop_progress);
 147                                 printf("\t\tdrop key %Lu %x %Lu level %d\n",
 148                                        (unsigned long long)drop_key.objectid,
 149                                        drop_key.type,
 150                                        (unsigned long long)drop_key.offset,
 151                                        root_item.drop_level);
 152                         }
 153                         break;
 154                 case BTRFS_EXTENT_ITEM_KEY:
 155                         ei = btrfs_item_ptr(l, i, struct btrfs_extent_item);
 156                         printf("\t\textent data refs %u\n",
 157                                 btrfs_extent_refs(l, ei));
 158                         break;
 159                 case BTRFS_EXTENT_REF_KEY:
 160                         ref = btrfs_item_ptr(l, i, struct btrfs_extent_ref);
 161                         printf("\t\textent back ref root %llu gen %llu "
 162                                "owner %llu offset %llu\n",
 163                                (unsigned long long)btrfs_ref_root(l, ref),
 164                                (unsigned long long)btrfs_ref_generation(l, ref),
 165                                (unsigned long long)btrfs_ref_objectid(l, ref),
 166                                (unsigned long long)btrfs_ref_offset(l, ref));
 167                         break;
 168                 case BTRFS_CSUM_ITEM_KEY:
 169                         ci = btrfs_item_ptr(l, i, struct btrfs_csum_item);
 170                         printf("\t\tcsum item\n");
 171                         break;
 172                 case BTRFS_EXTENT_DATA_KEY:
 173                         fi = btrfs_item_ptr(l, i,
 174                                             struct btrfs_file_extent_item);
 175                         if (btrfs_file_extent_type(l, fi) ==
 176                             BTRFS_FILE_EXTENT_INLINE) {
 177                                 printf("\t\tinline extent data size %u\n",
 178                                    btrfs_file_extent_inline_len(l, item));
 179                                 break;
 180                         }
 181                         printf("\t\textent data disk byte %llu nr %llu\n",
 182                                (unsigned long long)btrfs_file_extent_disk_bytenr(l, fi),
 183                                (unsigned long long)btrfs_file_extent_disk_num_bytes(l, fi));
 184                         printf("\t\textent data offset %llu nr %llu\n",
 185                           (unsigned long long)btrfs_file_extent_offset(l, fi),
 186                           (unsigned long long)btrfs_file_extent_num_bytes(l, fi));
 187                         break;
 188                 case BTRFS_BLOCK_GROUP_ITEM_KEY:
 189                         bi = btrfs_item_ptr(l, i,
 190                                             struct btrfs_block_group_item);
 191                         read_extent_buffer(l, &bg_item, (unsigned long)bi,
 192                                            sizeof(bg_item));
 193                         printf("\t\tblock group used %llu flags %x\n",
 194                                (unsigned long long)btrfs_block_group_used(&bg_item),
 195                                bg_item.flags);
 196                         break;
 197                 case BTRFS_STRING_ITEM_KEY:
 198                         /* dirty, but it's simple */
 199                         str = l->data + btrfs_item_ptr_offset(l, i);
 200                         printf("\t\titem data %.*s\n", btrfs_item_size(l, item), str);
 201                         break;
 202                 };
 203                 fflush(stdout);
 204         }
 205 }
 206 void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *eb)
 207 {
 208         int i;
 209         u32 nr;
 210         u32 size;
 211         struct btrfs_key key;
 212
 213         if (!eb)
 214                 return;
 215         nr = btrfs_header_nritems(eb);
 216         if (btrfs_is_leaf(eb)) {
 217                 btrfs_print_leaf(root, eb);
 218                 return;
 219         }
 220         printf("node %llu level %d ptrs %d free %u generation %llu owner %llu\n",
 221                (unsigned long long)eb->start,
 222                 btrfs_header_level(eb), nr,
 223                 (u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr,
 224                 (unsigned long long)btrfs_header_generation(eb),
 225                 (unsigned long long)btrfs_header_owner(eb));
 226         fflush(stdout);
 227         size = btrfs_level_size(root, btrfs_header_level(eb) - 1);
 228         for (i = 0; i < nr; i++) {
 229                 u64 blocknr = btrfs_node_blockptr(eb, i);
 230                 btrfs_node_key_to_cpu(eb, &key, i);
 231                 printf("\tkey %d (%llu %x %llu) block %llu (%llu) gen %llu\n",
 232                        i,
 233                        (unsigned long long)key.objectid,
 234                        key.type,
 235                        (unsigned long long)key.offset,
 236                        (unsigned long long)blocknr,
 237                        (unsigned long long)blocknr / size,
 238                        (unsigned long long)btrfs_node_ptr_generation(eb, i));
 239                 fflush(stdout);
 240         }
 241         for (i = 0; i < nr; i++) {
 242                 struct extent_buffer *next = read_tree_block(root,
 243                                              btrfs_node_blockptr(eb, i),
 244                                              size);
 245                 if (btrfs_is_leaf(next) &&
 246                     btrfs_header_level(eb) != 1)
 247                         BUG();
 248                 if (btrfs_header_level(next) !=
 249                         btrfs_header_level(eb) - 1)
 250                         BUG();
 251                 btrfs_print_tree(root, next);
 252                 free_extent_buffer(next);
 253         }
 254 }
 255