source/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 2 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, write to the Free Software
  26    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  27 */
  28
  29 #include "tdb_private.h"
  30
  31 static tdb_off_t tdb_dump_record(struct tdb_context *tdb, int hash,
  32                                  tdb_off_t offset)
  33 {
  34         struct list_struct rec;
  35         tdb_off_t tailer_ofs, tailer;
  36
  37         if (tdb->methods->tdb_read(tdb, offset, (char *)&rec,
  38                                    sizeof(rec), DOCONV()) == -1) {
  39                 printf("ERROR: failed to read record at %u\n", offset);
  40                 return 0;
  41         }
  42
  43         printf(" rec: hash=%d offset=0x%08x next=0x%08x rec_len=%d "
  44                "key_len=%d data_len=%d full_hash=0x%x magic=0x%x\n",
  45                hash, offset, rec.next, rec.rec_len, rec.key_len, rec.data_len,
  46                rec.full_hash, rec.magic);
  47
  48         tailer_ofs = offset + sizeof(rec) + rec.rec_len - sizeof(tdb_off_t);
  49
  50         if (tdb_ofs_read(tdb, tailer_ofs, &tailer) == -1) {
  51                 printf("ERROR: failed to read tailer at %u\n", tailer_ofs);
  52                 return rec.next;
  53         }
  54
  55         if (tailer != rec.rec_len + sizeof(rec)) {
  56                 printf("ERROR: tailer does not match record! tailer=%u totalsize=%u\n",
  57                                 (unsigned int)tailer, (unsigned int)(rec.rec_len + sizeof(rec)));
  58         }
  59         return rec.next;
  60 }
  61
  62 static int tdb_dump_chain(struct tdb_context *tdb, int i)
  63 {
  64         tdb_off_t rec_ptr, top;
  65
  66         top = TDB_HASH_TOP(i);
  67
  68         if (tdb_lock(tdb, i, F_WRLCK) != 0)
  69                 return -1;
  70
  71         if (tdb_ofs_read(tdb, top, &rec_ptr) == -1)
  72                 return tdb_unlock(tdb, i, F_WRLCK);
  73
  74         if (rec_ptr)
  75                 printf("hash=%d\n", i);
  76
  77         while (rec_ptr) {
  78                 rec_ptr = tdb_dump_record(tdb, i, rec_ptr);
  79         }
  80
  81         return tdb_unlock(tdb, i, F_WRLCK);
  82 }
  83
  84 void tdb_dump_all(struct tdb_context *tdb)
  85 {
  86         int i;
  87         for (i=0;i<tdb->header.hash_size;i++) {
  88                 tdb_dump_chain(tdb, i);
  89         }
  90         printf("freelist:\n");
  91         tdb_dump_chain(tdb, -1);
  92 }
  93
  94 int tdb_printfreelist(struct tdb_context *tdb)
  95 {
  96         int ret;
  97         long total_free = 0;
  98         tdb_off_t offset, rec_ptr;
  99         struct list_struct rec;
 100
 101         if ((ret = tdb_lock(tdb, -1, F_WRLCK)) != 0)
 102                 return ret;
 103
 104         offset = FREELIST_TOP;
 105
 106         /* read in the freelist top */
 107         if (tdb_ofs_read(tdb, offset, &rec_ptr) == -1) {
 108                 tdb_unlock(tdb, -1, F_WRLCK);
 109                 return 0;
 110         }
 111
 112         printf("freelist top=[0x%08x]\n", rec_ptr );
 113         while (rec_ptr) {
 114                 if (tdb->methods->tdb_read(tdb, rec_ptr, (char *)&rec,
 115                                            sizeof(rec), DOCONV()) == -1) {
 116                         tdb_unlock(tdb, -1, F_WRLCK);
 117                         return -1;
 118                 }
 119
 120                 if (rec.magic != TDB_FREE_MAGIC) {
 121                         printf("bad magic 0x%08x in free list\n", rec.magic);
 122                         tdb_unlock(tdb, -1, F_WRLCK);
 123                         return -1;
 124                 }
 125
 126                 printf("entry offset=[0x%08x], rec.rec_len = [0x%08x (%d)] (end = 0x%08x)\n",
 127                        rec_ptr, rec.rec_len, rec.rec_len, rec_ptr + rec.rec_len);
 128                 total_free += rec.rec_len;
 129
 130                 /* move to the next record */
 131                 rec_ptr = rec.next;
 132         }
 133         printf("total rec_len = [0x%08x (%d)]\n", (int)total_free,
 134                (int)total_free);
 135
 136         return tdb_unlock(tdb, -1, F_WRLCK);
 137 }
 138