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