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 static void print_file_extent_item(struct extent_buffer *eb,
 128                                    struct btrfs_item *item,
 129                                    struct btrfs_file_extent_item *fi)
 130 {
 131         int extent_type = btrfs_file_extent_type(eb, fi);
 132
 133         if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
 134                 printf("\t\tinline extent data size %u "
 135                        "ram %u compress %d\n",
 136                   btrfs_file_extent_inline_item_len(eb, item),
 137                   btrfs_file_extent_inline_len(eb, fi),
 138                   btrfs_file_extent_compression(eb, fi));
 139                 return;
 140         }
 141         if (extent_type == BTRFS_FILE_EXTENT_PREALLOC) {
 142                 printf("\t\tprealloc data disk byte %llu nr %llu\n",
 143                   (unsigned long long)btrfs_file_extent_disk_bytenr(eb, fi),
 144                   (unsigned long long)btrfs_file_extent_disk_num_bytes(eb, fi));
 145                 printf("\t\tprealloc data offset %llu nr %llu\n",
 146                   (unsigned long long)btrfs_file_extent_offset(eb, fi),
 147                   (unsigned long long)btrfs_file_extent_num_bytes(eb, fi));
 148                 return;
 149         }
 150         printf("\t\textent data disk byte %llu nr %llu\n",
 151                 (unsigned long long)btrfs_file_extent_disk_bytenr(eb, fi),
 152                 (unsigned long long)btrfs_file_extent_disk_num_bytes(eb, fi));
 153         printf("\t\textent data offset %llu nr %llu ram %llu\n",
 154                 (unsigned long long)btrfs_file_extent_offset(eb, fi),
 155                 (unsigned long long)btrfs_file_extent_num_bytes(eb, fi),
 156                 (unsigned long long)btrfs_file_extent_ram_bytes(eb, fi));
 157         printf("\t\textent compression %d\n",
 158                btrfs_file_extent_compression(eb, fi));
 159 }
 160
 161
 162 static void print_root_ref(struct extent_buffer *leaf, int slot, char *tag)
 163 {
 164         struct btrfs_root_ref *ref;
 165         char namebuf[BTRFS_NAME_LEN];
 166         int namelen;
 167
 168         ref = btrfs_item_ptr(leaf, slot, struct btrfs_root_ref);
 169         namelen = btrfs_root_ref_name_len(leaf, ref);
 170         read_extent_buffer(leaf, namebuf, (unsigned long)(ref + 1), namelen);
 171         printf("\t\troot %s key dirid %llu sequence %llu name %.*s\n", tag,
 172                (unsigned long long)btrfs_root_ref_dirid(leaf, ref),
 173                (unsigned long long)btrfs_root_ref_sequence(leaf, ref),
 174                namelen, namebuf);
 175 }
 176
 177 void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
 178 {
 179         int i;
 180         char *str;
 181         struct btrfs_item *item;
 182         struct btrfs_extent_item *ei;
 183         struct btrfs_root_item *ri;
 184         struct btrfs_dir_item *di;
 185         struct btrfs_inode_item *ii;
 186         struct btrfs_file_extent_item *fi;
 187         struct btrfs_csum_item *ci;
 188         struct btrfs_block_group_item *bi;
 189         struct btrfs_extent_ref *ref;
 190         struct btrfs_inode_ref *iref;
 191         struct btrfs_dev_extent *dev_extent;
 192         struct btrfs_disk_key disk_key;
 193         struct btrfs_root_item root_item;
 194         struct btrfs_block_group_item bg_item;
 195         u32 nr = btrfs_header_nritems(l);
 196         u32 type;
 197
 198         printf("leaf %llu ptrs %d free space %d generation %llu owner %llu\n",
 199                 (unsigned long long)btrfs_header_bytenr(l), nr,
 200                 btrfs_leaf_free_space(root, l),
 201                 (unsigned long long)btrfs_header_generation(l),
 202                 (unsigned long long)btrfs_header_owner(l));
 203         print_uuids(l);
 204         fflush(stdout);
 205         for (i = 0 ; i < nr ; i++) {
 206                 item = btrfs_item_nr(l, i);
 207                 btrfs_item_key(l, &disk_key, i);
 208                 type = btrfs_disk_key_type(&disk_key);
 209                 printf("\titem %d key (%llu %x %llu) itemoff %d itemsize %d\n",
 210                         i,
 211                         (unsigned long long)btrfs_disk_key_objectid(&disk_key),
 212                         btrfs_disk_key_type(&disk_key),
 213                         (unsigned long long)btrfs_disk_key_offset(&disk_key),
 214                         btrfs_item_offset(l, item),
 215                         btrfs_item_size(l, item));
 216                 switch (type) {
 217                 case BTRFS_INODE_ITEM_KEY:
 218                         ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
 219                         printf("\t\tinode generation %llu size %llu block group %llu mode %o links %u\n",
 220                                (unsigned long long)btrfs_inode_generation(l, ii),
 221                                (unsigned long long)btrfs_inode_size(l, ii),
 222                                (unsigned long long)btrfs_inode_block_group(l,ii),
 223                                btrfs_inode_mode(l, ii),
 224                                btrfs_inode_nlink(l, ii));
 225                         break;
 226                 case BTRFS_INODE_REF_KEY:
 227                         iref = btrfs_item_ptr(l, i, struct btrfs_inode_ref);
 228                         print_inode_ref_item(l, item, iref);
 229                         break;
 230                 case BTRFS_DIR_ITEM_KEY:
 231                 case BTRFS_DIR_INDEX_KEY:
 232                 case BTRFS_XATTR_ITEM_KEY:
 233                         di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
 234                         print_dir_item(l, item, di);
 235                         break;
 236                 case BTRFS_ORPHAN_ITEM_KEY:
 237                         printf("\t\torphan item\n");
 238                         break;
 239                 case BTRFS_ROOT_ITEM_KEY:
 240                         ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
 241                         read_extent_buffer(l, &root_item, (unsigned long)ri, sizeof(root_item));
 242                         printf("\t\troot data bytenr %llu level %d dirid %llu refs %u\n",
 243                                 (unsigned long long)btrfs_root_bytenr(&root_item),
 244                                 btrfs_root_level(&root_item),
 245                                 (unsigned long long)btrfs_root_dirid(&root_item),
 246                                 btrfs_root_refs(&root_item));
 247                         if (1 || btrfs_root_refs(&root_item) == 0) {
 248                                 struct btrfs_key drop_key;
 249                                 btrfs_disk_key_to_cpu(&drop_key,
 250                                                       &root_item.drop_progress);
 251                                 printf("\t\tdrop key %Lu %x %Lu level %d\n",
 252                                        (unsigned long long)drop_key.objectid,
 253                                        drop_key.type,
 254                                        (unsigned long long)drop_key.offset,
 255                                        root_item.drop_level);
 256                         }
 257                         break;
 258                 case BTRFS_ROOT_REF_KEY:
 259                         print_root_ref(l, i, "ref");
 260                         break;
 261                 case BTRFS_ROOT_BACKREF_KEY:
 262                         print_root_ref(l, i, "backref");
 263                         break;
 264                 case BTRFS_EXTENT_ITEM_KEY:
 265                         ei = btrfs_item_ptr(l, i, struct btrfs_extent_item);
 266                         printf("\t\textent data refs %u\n",
 267                                 btrfs_extent_refs(l, ei));
 268                         break;
 269                 case BTRFS_EXTENT_REF_KEY:
 270                         ref = btrfs_item_ptr(l, i, struct btrfs_extent_ref);
 271                         printf("\t\textent back ref root %llu gen %llu "
 272                                "owner %llu num_refs %lu\n",
 273                                (unsigned long long)btrfs_ref_root(l, ref),
 274                                (unsigned long long)btrfs_ref_generation(l, ref),
 275                                (unsigned long long)btrfs_ref_objectid(l, ref),
 276                                (unsigned long)btrfs_ref_num_refs(l, ref));
 277                         break;
 278                 case BTRFS_CSUM_ITEM_KEY:
 279                         ci = btrfs_item_ptr(l, i, struct btrfs_csum_item);
 280                         printf("\t\tcsum item\n");
 281                         break;
 282                 case BTRFS_EXTENT_DATA_KEY:
 283                         fi = btrfs_item_ptr(l, i,
 284                                             struct btrfs_file_extent_item);
 285                         print_file_extent_item(l, item, fi);
 286                         break;
 287                 case BTRFS_BLOCK_GROUP_ITEM_KEY:
 288                         bi = btrfs_item_ptr(l, i,
 289                                             struct btrfs_block_group_item);
 290                         read_extent_buffer(l, &bg_item, (unsigned long)bi,
 291                                            sizeof(bg_item));
 292                         printf("\t\tblock group used %llu flags %llu\n",
 293                                (unsigned long long)btrfs_block_group_used(&bg_item),
 294                                (unsigned long long)btrfs_block_group_flags(&bg_item));
 295                         break;
 296                 case BTRFS_CHUNK_ITEM_KEY:
 297                         print_chunk(l, btrfs_item_ptr(l, i, struct btrfs_chunk));
 298                         break;
 299                 case BTRFS_DEV_ITEM_KEY:
 300                         print_dev_item(l, btrfs_item_ptr(l, i,
 301                                         struct btrfs_dev_item));
 302                         break;
 303                 case BTRFS_DEV_EXTENT_KEY:
 304                         dev_extent = btrfs_item_ptr(l, i,
 305                                                     struct btrfs_dev_extent);
 306                         printf("\t\tdev extent chunk_tree %llu\n"
 307                                "\t\tchunk objectid %llu chunk offset %llu "
 308                                "length %llu\n",
 309                                (unsigned long long)
 310                                btrfs_dev_extent_chunk_tree(l, dev_extent),
 311                                (unsigned long long)
 312                                btrfs_dev_extent_chunk_objectid(l, dev_extent),
 313                                (unsigned long long)
 314                                btrfs_dev_extent_chunk_offset(l, dev_extent),
 315                                (unsigned long long)
 316                                btrfs_dev_extent_length(l, dev_extent));
 317                         break;
 318                 case BTRFS_STRING_ITEM_KEY:
 319                         /* dirty, but it's simple */
 320                         str = l->data + btrfs_item_ptr_offset(l, i);
 321                         printf("\t\titem data %.*s\n", btrfs_item_size(l, item), str);
 322                         break;
 323                 };
 324                 fflush(stdout);
 325         }
 326 }
 327
 328 void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *eb)
 329 {
 330         int i;
 331         u32 nr;
 332         u32 size;
 333         struct btrfs_key key;
 334
 335         if (!eb)
 336                 return;
 337         nr = btrfs_header_nritems(eb);
 338         if (btrfs_is_leaf(eb)) {
 339                 btrfs_print_leaf(root, eb);
 340                 return;
 341         }
 342         printf("node %llu level %d ptrs %d free %u generation %llu owner %llu\n",
 343                (unsigned long long)eb->start,
 344                 btrfs_header_level(eb), nr,
 345                 (u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr,
 346                 (unsigned long long)btrfs_header_generation(eb),
 347                 (unsigned long long)btrfs_header_owner(eb));
 348         print_uuids(eb);
 349         fflush(stdout);
 350         size = btrfs_level_size(root, btrfs_header_level(eb) - 1);
 351         for (i = 0; i < nr; i++) {
 352                 u64 blocknr = btrfs_node_blockptr(eb, i);
 353                 btrfs_node_key_to_cpu(eb, &key, i);
 354                 printf("\tkey %d (%llu %x %llu) block %llu (%llu) gen %llu\n",
 355                        i,
 356                        (unsigned long long)key.objectid,
 357                        key.type,
 358                        (unsigned long long)key.offset,
 359                        (unsigned long long)blocknr,
 360                        (unsigned long long)blocknr / size,
 361                        (unsigned long long)btrfs_node_ptr_generation(eb, i));
 362                 fflush(stdout);
 363         }
 364         for (i = 0; i < nr; i++) {
 365                 struct extent_buffer *next = read_tree_block(root,
 366                                              btrfs_node_blockptr(eb, i),
 367                                              size,
 368                                              btrfs_node_ptr_generation(eb, i));
 369                 if (btrfs_is_leaf(next) &&
 370                     btrfs_header_level(eb) != 1)
 371                         BUG();
 372                 if (btrfs_header_level(next) !=
 373                         btrfs_header_level(eb) - 1)
 374                         BUG();
 375                 btrfs_print_tree(root, next);
 376                 free_extent_buffer(next);
 377         }
 378 }
 379