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