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 <uuid/uuid.h>
  22 #include "kerncompat.h"
  23 #include "radix-tree.h"
  24 #include "ctree.h"
  25 #include "disk-io.h"
  26
  27 static int print_dir_item(struct extent_buffer *eb, struct btrfs_item *item,
  28                           struct btrfs_dir_item *di)
  29 {
  30         u32 total;
  31         u32 cur = 0;
  32         u32 len;
  33         u32 name_len;
  34         u32 data_len;
  35         char namebuf[BTRFS_NAME_LEN];
  36         struct btrfs_disk_key location;
  37
  38         total = btrfs_item_size(eb, item);
  39         while(cur < total) {
  40                 btrfs_dir_item_key(eb, di, &location);
  41                 printf("\t\tdir index %llu type %u\n",
  42                        (unsigned long long)btrfs_disk_key_objectid(&location),
  43                        btrfs_dir_type(eb, di));
  44                 name_len = btrfs_dir_name_len(eb, di);
  45                 data_len = btrfs_dir_data_len(eb, di);
  46                 len = (name_len <= sizeof(namebuf))? name_len: sizeof(namebuf);
  47                 read_extent_buffer(eb, namebuf, (unsigned long)(di + 1), len);
  48                 printf("\t\tnamelen %u datalen %u name: %.*s\n",
  49                        name_len, data_len, len, namebuf);
  50                 len = sizeof(*di) + name_len + data_len;
  51                 di = (struct btrfs_dir_item *)((char *)di + len);
  52                 cur += len;
  53         }
  54         return 0;
  55 }
  56
  57 static int print_inode_ref_item(struct extent_buffer *eb, struct btrfs_item *item,
  58                                 struct btrfs_inode_ref *ref)
  59 {
  60         u32 total;
  61         u32 cur = 0;
  62         u32 len;
  63         u32 name_len;
  64         u64 index;
  65         char namebuf[BTRFS_NAME_LEN];
  66         total = btrfs_item_size(eb, item);
  67         while(cur < total) {
  68                 name_len = btrfs_inode_ref_name_len(eb, ref);
  69                 index = btrfs_inode_ref_index(eb, ref);
  70                 len = (name_len <= sizeof(namebuf))? name_len: sizeof(namebuf);
  71                 read_extent_buffer(eb, namebuf, (unsigned long)(ref + 1), len);
  72                 printf("\t\tinode ref index %llu namelen %u name: %.*s\n",
  73                        index, name_len, len, namebuf);
  74                 len = sizeof(*ref) + name_len;
  75                 ref = (struct btrfs_inode_ref *)((char *)ref + len);
  76                 cur += len;
  77         }
  78         return 0;
  79 }
  80
  81 static void print_chunk(struct extent_buffer *eb, struct btrfs_chunk *chunk)
  82 {
  83         int num_stripes = btrfs_chunk_num_stripes(eb, chunk);
  84         int i;
  85         printf("\t\tchunk length %llu owner %llu type %llu num_stripes %d\n",
  86                (unsigned long long)btrfs_chunk_length(eb, chunk),
  87                (unsigned long long)btrfs_chunk_owner(eb, chunk),
  88                (unsigned long long)btrfs_chunk_type(eb, chunk),
  89                num_stripes);
  90         for (i = 0 ; i < num_stripes ; i++) {
  91                 printf("\t\t\tstripe %d devid %llu offset %llu\n", i,
  92                       (unsigned long long)btrfs_stripe_devid_nr(eb, chunk, i),
  93                       (unsigned long long)btrfs_stripe_offset_nr(eb, chunk, i));
  94         }
  95 }
  96 static void print_dev_item(struct extent_buffer *eb,
  97                            struct btrfs_dev_item *dev_item)
  98 {
  99         printf("\t\tdev item devid %llu "
 100                "total_bytes %llu bytes used %Lu\n",
 101                (unsigned long long)btrfs_device_id(eb, dev_item),
 102                (unsigned long long)btrfs_device_total_bytes(eb, dev_item),
 103                (unsigned long long)btrfs_device_bytes_used(eb, dev_item));
 104 }
 105
 106 static void print_uuids(struct extent_buffer *eb)
 107 {
 108         char fs_uuid[37];
 109         char chunk_uuid[37];
 110         u8 disk_uuid[BTRFS_UUID_SIZE];
 111
 112         read_extent_buffer(eb, disk_uuid, (unsigned long)btrfs_header_fsid(eb),
 113                            BTRFS_FSID_SIZE);
 114
 115         fs_uuid[36] = '\0';
 116         uuid_unparse(disk_uuid, fs_uuid);
 117
 118         read_extent_buffer(eb, disk_uuid,
 119                            (unsigned long)btrfs_header_chunk_tree_uuid(eb),
 120                            BTRFS_UUID_SIZE);
 121
 122         chunk_uuid[36] = '\0';
 123         uuid_unparse(disk_uuid, chunk_uuid);
 124         printf("fs uuid %s\nchunk uuid %s\n", fs_uuid, chunk_uuid);
 125 }
 126
 127 void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
 128 {
 129         int i;
 130         char *str;
 131         struct btrfs_item *item;
 132         struct btrfs_extent_item *ei;
 133         struct btrfs_root_item *ri;
 134         struct btrfs_dir_item *di;
 135         struct btrfs_inode_item *ii;
 136         struct btrfs_file_extent_item *fi;
 137         struct btrfs_csum_item *ci;
 138         struct btrfs_block_group_item *bi;
 139         struct btrfs_extent_ref *ref;
 140         struct btrfs_inode_ref *iref;
 141         struct btrfs_dev_extent *dev_extent;
 142         struct btrfs_disk_key disk_key;
 143         struct btrfs_root_item root_item;
 144         struct btrfs_block_group_item bg_item;
 145         u32 nr = btrfs_header_nritems(l);
 146         u32 type;
 147
 148         printf("leaf %llu ptrs %d free space %d generation %llu owner %llu\n",
 149                 (unsigned long long)btrfs_header_bytenr(l), nr,
 150                 btrfs_leaf_free_space(root, l),
 151                 (unsigned long long)btrfs_header_generation(l),
 152                 (unsigned long long)btrfs_header_owner(l));
 153         print_uuids(l);
 154         fflush(stdout);
 155         for (i = 0 ; i < nr ; i++) {
 156                 item = btrfs_item_nr(l, i);
 157                 btrfs_item_key(l, &disk_key, i);
 158                 type = btrfs_disk_key_type(&disk_key);
 159                 printf("\titem %d key (%llu %x %llu) itemoff %d itemsize %d\n",
 160                         i,
 161                         (unsigned long long)btrfs_disk_key_objectid(&disk_key),
 162                         btrfs_disk_key_type(&disk_key),
 163                         (unsigned long long)btrfs_disk_key_offset(&disk_key),
 164                         btrfs_item_offset(l, item),
 165                         btrfs_item_size(l, item));
 166                 switch (type) {
 167                 case BTRFS_INODE_ITEM_KEY:
 168                         ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
 169                         printf("\t\tinode generation %llu size %llu block group %llu mode %o links %u\n",
 170                                (unsigned long long)btrfs_inode_generation(l, ii),
 171                                (unsigned long long)btrfs_inode_size(l, ii),
 172                                (unsigned long long)btrfs_inode_block_group(l,ii),
 173                                btrfs_inode_mode(l, ii),
 174                                btrfs_inode_nlink(l, ii));
 175                         break;
 176                 case BTRFS_INODE_REF_KEY:
 177                         iref = btrfs_item_ptr(l, i, struct btrfs_inode_ref);
 178                         print_inode_ref_item(l, item, iref);
 179                         break;
 180                 case BTRFS_DIR_ITEM_KEY:
 181                 case BTRFS_DIR_INDEX_KEY:
 182                 case BTRFS_XATTR_ITEM_KEY:
 183                         di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
 184                         print_dir_item(l, item, di);
 185                         break;
 186                 case BTRFS_ROOT_ITEM_KEY:
 187                         ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
 188                         read_extent_buffer(l, &root_item, (unsigned long)ri, sizeof(root_item));
 189                         printf("\t\troot data bytenr %llu level %d dirid %llu refs %u\n",
 190                                 (unsigned long long)btrfs_root_bytenr(&root_item),
 191                                 btrfs_root_level(&root_item),
 192                                 (unsigned long long)btrfs_root_dirid(&root_item),
 193                                 btrfs_root_refs(&root_item));
 194                         if (1 || btrfs_root_refs(&root_item) == 0) {
 195                                 struct btrfs_key drop_key;
 196                                 btrfs_disk_key_to_cpu(&drop_key,
 197                                                       &root_item.drop_progress);
 198                                 printf("\t\tdrop key %Lu %x %Lu level %d\n",
 199                                        (unsigned long long)drop_key.objectid,
 200                                        drop_key.type,
 201                                        (unsigned long long)drop_key.offset,
 202                                        root_item.drop_level);
 203                         }
 204                         break;
 205                 case BTRFS_EXTENT_ITEM_KEY:
 206                         ei = btrfs_item_ptr(l, i, struct btrfs_extent_item);
 207                         printf("\t\textent data refs %u\n",
 208                                 btrfs_extent_refs(l, ei));
 209                         break;
 210                 case BTRFS_EXTENT_REF_KEY:
 211                         ref = btrfs_item_ptr(l, i, struct btrfs_extent_ref);
 212                         printf("\t\textent back ref root %llu gen %llu "
 213                                "owner %llu offset %llu\n",
 214                                (unsigned long long)btrfs_ref_root(l, ref),
 215                                (unsigned long long)btrfs_ref_generation(l, ref),
 216                                (unsigned long long)btrfs_ref_objectid(l, ref),
 217                                (unsigned long long)btrfs_ref_offset(l, ref));
 218                         break;
 219                 case BTRFS_CSUM_ITEM_KEY:
 220                         ci = btrfs_item_ptr(l, i, struct btrfs_csum_item);
 221                         printf("\t\tcsum item\n");
 222                         break;
 223                 case BTRFS_EXTENT_DATA_KEY:
 224                         fi = btrfs_item_ptr(l, i,
 225                                             struct btrfs_file_extent_item);
 226                         if (btrfs_file_extent_type(l, fi) ==
 227                             BTRFS_FILE_EXTENT_INLINE) {
 228                                 printf("\t\tinline extent data size %u\n",
 229                                    btrfs_file_extent_inline_len(l, item));
 230                                 break;
 231                         }
 232                         printf("\t\textent data disk byte %llu nr %llu\n",
 233                                (unsigned long long)btrfs_file_extent_disk_bytenr(l, fi),
 234                                (unsigned long long)btrfs_file_extent_disk_num_bytes(l, fi));
 235                         printf("\t\textent data offset %llu nr %llu\n",
 236                           (unsigned long long)btrfs_file_extent_offset(l, fi),
 237                           (unsigned long long)btrfs_file_extent_num_bytes(l, fi));
 238                         break;
 239                 case BTRFS_BLOCK_GROUP_ITEM_KEY:
 240                         bi = btrfs_item_ptr(l, i,
 241                                             struct btrfs_block_group_item);
 242                         read_extent_buffer(l, &bg_item, (unsigned long)bi,
 243                                            sizeof(bg_item));
 244                         printf("\t\tblock group used %llu flags %llu\n",
 245                                (unsigned long long)btrfs_block_group_used(&bg_item),
 246                                (unsigned long long)btrfs_block_group_flags(&bg_item));
 247                         break;
 248                 case BTRFS_CHUNK_ITEM_KEY:
 249                         print_chunk(l, btrfs_item_ptr(l, i, struct btrfs_chunk));
 250                         break;
 251                 case BTRFS_DEV_ITEM_KEY:
 252                         print_dev_item(l, btrfs_item_ptr(l, i,
 253                                         struct btrfs_dev_item));
 254                         break;
 255                 case BTRFS_DEV_EXTENT_KEY:
 256                         dev_extent = btrfs_item_ptr(l, i,
 257                                                     struct btrfs_dev_extent);
 258                         printf("\t\tdev extent chunk_tree %llu\n"
 259                                "\t\tchunk objectid %llu chunk offset %llu "
 260                                "length %llu\n",
 261                                (unsigned long long)
 262                                btrfs_dev_extent_chunk_tree(l, dev_extent),
 263                                (unsigned long long)
 264                                btrfs_dev_extent_chunk_objectid(l, dev_extent),
 265                                (unsigned long long)
 266                                btrfs_dev_extent_chunk_offset(l, dev_extent),
 267                                (unsigned long long)
 268                                btrfs_dev_extent_length(l, dev_extent));
 269                         break;
 270                 case BTRFS_STRING_ITEM_KEY:
 271                         /* dirty, but it's simple */
 272                         str = l->data + btrfs_item_ptr_offset(l, i);
 273                         printf("\t\titem data %.*s\n", btrfs_item_size(l, item), str);
 274                         break;
 275                 };
 276                 fflush(stdout);
 277         }
 278 }
 279
 280 void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *eb)
 281 {
 282         int i;
 283         u32 nr;
 284         u32 size;
 285         struct btrfs_key key;
 286
 287         if (!eb)
 288                 return;
 289         nr = btrfs_header_nritems(eb);
 290         if (btrfs_is_leaf(eb)) {
 291                 btrfs_print_leaf(root, eb);
 292                 return;
 293         }
 294         printf("node %llu level %d ptrs %d free %u generation %llu owner %llu\n",
 295                (unsigned long long)eb->start,
 296                 btrfs_header_level(eb), nr,
 297                 (u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr,
 298                 (unsigned long long)btrfs_header_generation(eb),
 299                 (unsigned long long)btrfs_header_owner(eb));
 300         print_uuids(eb);
 301         fflush(stdout);
 302         size = btrfs_level_size(root, btrfs_header_level(eb) - 1);
 303         for (i = 0; i < nr; i++) {
 304                 u64 blocknr = btrfs_node_blockptr(eb, i);
 305                 btrfs_node_key_to_cpu(eb, &key, i);
 306                 printf("\tkey %d (%llu %x %llu) block %llu (%llu) gen %llu\n",
 307                        i,
 308                        (unsigned long long)key.objectid,
 309                        key.type,
 310                        (unsigned long long)key.offset,
 311                        (unsigned long long)blocknr,
 312                        (unsigned long long)blocknr / size,
 313                        (unsigned long long)btrfs_node_ptr_generation(eb, i));
 314                 fflush(stdout);
 315         }
 316         for (i = 0; i < nr; i++) {
 317                 struct extent_buffer *next = read_tree_block(root,
 318                                              btrfs_node_blockptr(eb, i),
 319                                              size,
 320                                              btrfs_node_ptr_generation(eb, i));
 321                 if (btrfs_is_leaf(next) &&
 322                     btrfs_header_level(eb) != 1)
 323                         BUG();
 324                 if (btrfs_header_level(next) !=
 325                         btrfs_header_level(eb) - 1)
 326                         BUG();
 327                 btrfs_print_tree(root, next);
 328                 free_extent_buffer(next);
 329         }
 330 }
 331