lib/tdb/common/dump.c

   1  /*
   2    Unix SMB/CIFS implementation.
   3
   4    trivial database library
   5
   6    Copyright (C) Andrew Tridgell              1999-2005
   7    Copyright (C) Paul `Rusty' Russell              2000
   8    Copyright (C) Jeremy Allison                    2000-2003
   9
  10      ** NOTE! The following LGPL license applies to the tdb
  11      ** library. This does NOT imply that all of Samba is released
  12      ** under the LGPL
  13
  14    This library is free software; you can redistribute it and/or
  15    modify it under the terms of the GNU Lesser General Public
  16    License as published by the Free Software Foundation; either
  17    version 3 of the License, or (at your option) any later version.
  18
  19    This library is distributed in the hope that it will be useful,
  20    but WITHOUT ANY WARRANTY; without even the implied warranty of
  21    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  22    Lesser General Public License for more details.
  23
  24    You should have received a copy of the GNU Lesser General Public
  25    License along with this library; if not, see <http://www.gnu.org/licenses/>.
  26 */
  27
  28 #include "tdb_private.h"
  29
  30 static tdb_off_t tdb_dump_record(struct tdb_context *tdb, int hash,
  31                                  tdb_off_t offset)
  32 {
  33         struct tdb_record rec;
  34         tdb_off_t tailer_ofs, tailer;
  35
  36         if (tdb->methods->tdb_read(tdb, offset, (char *)&rec,
  37                                    sizeof(rec), DOCONV()) == -1) {
  38                 printf("ERROR: failed to read record at %u\n", offset);
  39                 return 0;
  40         }
  41
  42         printf(" rec: hash=%d offset=0x%08x next=0x%08x rec_len=%d "
  43                "key_len=%d data_len=%d full_hash=0x%x magic=0x%x\n",
  44                hash, offset, rec.next, rec.rec_len, rec.key_len, rec.data_len,
  45                rec.full_hash, rec.magic);
  46
  47         tailer_ofs = offset + sizeof(rec) + rec.rec_len - sizeof(tdb_off_t);
  48
  49         if (tdb_ofs_read(tdb, tailer_ofs, &tailer) == -1) {
  50                 printf("ERROR: failed to read tailer at %u\n", tailer_ofs);
  51                 return rec.next;
  52         }
  53
  54         if (tailer != rec.rec_len + sizeof(rec)) {
  55                 printf("ERROR: tailer does not match record! tailer=%u totalsize=%u\n",
  56                                 (unsigned int)tailer, (unsigned int)(rec.rec_len + sizeof(rec)));
  57         }
  58         return rec.next;
  59 }
  60
  61 static int tdb_dump_chain(struct tdb_context *tdb, int i)
  62 {
  63         tdb_off_t rec_ptr, top;
  64
  65         top = TDB_HASH_TOP(i);
  66
  67         if (tdb_lock(tdb, i, F_WRLCK) != 0)
  68                 return -1;
  69
  70         if (tdb_ofs_read(tdb, top, &rec_ptr) == -1)
  71                 return tdb_unlock(tdb, i, F_WRLCK);
  72
  73         if (rec_ptr)
  74                 printf("hash=%d\n", i);
  75
  76         while (rec_ptr) {
  77                 rec_ptr = tdb_dump_record(tdb, i, rec_ptr);
  78         }
  79
  80         return tdb_unlock(tdb, i, F_WRLCK);
  81 }
  82
  83 _PUBLIC_ void tdb_dump_all(struct tdb_context *tdb)
  84 {
  85         int i;
  86         for (i=0;i<tdb->header.hash_size;i++) {
  87                 tdb_dump_chain(tdb, i);
  88         }
  89         printf("freelist:\n");
  90         tdb_dump_chain(tdb, -1);
  91 }
  92
  93 _PUBLIC_ int tdb_printfreelist(struct tdb_context *tdb)
  94 {
  95         int ret;
  96         long total_free = 0;
  97         tdb_off_t offset, rec_ptr;
  98         struct tdb_record rec;
  99
 100         if ((ret = tdb_lock(tdb, -1, F_WRLCK)) != 0)
 101                 return ret;
 102
 103         offset = FREELIST_TOP;
 104
 105         /* read in the freelist top */
 106         if (tdb_ofs_read(tdb, offset, &rec_ptr) == -1) {
 107                 tdb_unlock(tdb, -1, F_WRLCK);
 108                 return 0;
 109         }
 110
 111         printf("freelist top=[0x%08x]\n", rec_ptr );
 112         while (rec_ptr) {
 113                 if (tdb->methods->tdb_read(tdb, rec_ptr, (char *)&rec,
 114                                            sizeof(rec), DOCONV()) == -1) {
 115                         tdb_unlock(tdb, -1, F_WRLCK);
 116                         return -1;
 117                 }
 118
 119                 if (rec.magic != TDB_FREE_MAGIC) {
 120                         printf("bad magic 0x%08x in free list\n", rec.magic);
 121                         tdb_unlock(tdb, -1, F_WRLCK);
 122                         return -1;
 123                 }
 124
 125                 printf("entry offset=[0x%08x], rec.rec_len = [0x%08x (%d)] (end = 0x%08x)\n",
 126                        rec_ptr, rec.rec_len, rec.rec_len, rec_ptr + rec.rec_len);
 127                 total_free += rec.rec_len;
 128
 129                 /* move to the next record */
 130                 rec_ptr = rec.next;
 131         }
 132         printf("total rec_len = [0x%08x (%d)]\n", (int)total_free,
 133                (int)total_free);
 134
 135         return tdb_unlock(tdb, -1, F_WRLCK);
 136 }
 137