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