src/StoreMetaMD5.cc

   1
   2 /*
   3  * $Id: StoreMetaMD5.cc,v 1.3 2003/08/04 22:14:41 robertc Exp $
   4  *
   5  * DEBUG: section 20    Storage Manager Swapfile Metadata
   6  * AUTHOR: Kostas Anagnostakis
   7  *
   8  * SQUID Web Proxy Cache          http://www.squid-cache.org/
   9  * ----------------------------------------------------------
  10  *
  11  *  Squid is the result of efforts by numerous individuals from
  12  *  the Internet community; see the CONTRIBUTORS file for full
  13  *  details.   Many organizations have provided support for Squid's
  14  *  development; see the SPONSORS file for full details.  Squid is
  15  *  Copyrighted (C) 2001 by the Regents of the University of
  16  *  California; see the COPYRIGHT file for full details.  Squid
  17  *  incorporates software developed and/or copyrighted by other
  18  *  sources; see the CREDITS file for full details.
  19  *
  20  *  This program is free software; you can redistribute it and/or modify
  21  *  it under the terms of the GNU General Public License as published by
  22  *  the Free Software Foundation; either version 2 of the License, or
  23  *  (at your option) any later version.
  24  *
  25  *  This program is distributed in the hope that it will be useful,
  26  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  27  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  28  *  GNU General Public License for more details.
  29  *
  30  *  You should have received a copy of the GNU General Public License
  31  *  along with this program; if not, write to the Free Software
  32  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
  33  *
  34  */
  35
  36 #include "squid.h"
  37 #include "StoreMetaMD5.h"
  38 #include "Store.h"
  39 #include "MemObject.h"
  40
  41 MemPool *StoreMetaMD5::pool = NULL;
  42
  43 void *
  44 StoreMetaMD5::operator new (size_t byteCount)
  45 {
  46     /* derived classes with different sizes must implement their own new */
  47     assert (byteCount == sizeof (StoreMetaMD5));
  48
  49     if (!pool)
  50         pool = memPoolCreate("StoreMetaMD5", sizeof (StoreMetaMD5));
  51
  52     return memPoolAlloc(pool);
  53 }
  54
  55 void
  56 StoreMetaMD5::operator delete (void *address)
  57 {
  58     memPoolFree(pool, address);
  59 }
  60
  61 bool
  62 StoreMetaMD5::validLength(int len) const
  63 {
  64     return len == MD5_DIGEST_CHARS;
  65 }
  66
  67 int StoreMetaMD5::md5_mismatches = 0;
  68
  69 bool
  70 StoreMetaMD5::checkConsistency(StoreEntry *e) const
  71 {
  72     assert (getType() == STORE_META_KEY_MD5);
  73     assert(length == MD5_DIGEST_CHARS);
  74
  75     if (!EBIT_TEST(e->flags, KEY_PRIVATE) &&
  76             memcmp(value, e->key, MD5_DIGEST_CHARS)) {
  77         debug(20, 2) ("storeClientReadHeader: swapin MD5 mismatch\n");
  78         //      debug(20, 2) ("\t%s\n", storeKeyText((const cache_key *)value));
  79         debug(20, 2) ("\t%s\n", e->getMD5Text());
  80
  81         if (isPowTen(++md5_mismatches))
  82             debug(20, 1) ("WARNING: %d swapin MD5 mismatches\n",
  83                           md5_mismatches);
  84
  85         return false;
  86     }
  87
  88     return true;
  89 }