src/StoreMetaMD5.cc

   1
   2 /*
   3  * $Id$
   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 "md5.h"
  38 #include "MemObject.h"
  39 #include "protos.h"
  40 #include "Store.h"
  41 #include "StoreMetaMD5.h"
  42
  43 bool
  44 StoreMetaMD5::validLength(int len) const
  45 {
  46     return len == SQUID_MD5_DIGEST_LENGTH;
  47 }
  48
  49 int StoreMetaMD5::md5_mismatches = 0;
  50
  51 bool
  52 StoreMetaMD5::checkConsistency(StoreEntry *e) const
  53 {
  54     assert (getType() == STORE_META_KEY_MD5);
  55     assert(length == SQUID_MD5_DIGEST_LENGTH);
  56
  57     if (!EBIT_TEST(e->flags, KEY_PRIVATE) &&
  58             memcmp(value, e->key, SQUID_MD5_DIGEST_LENGTH)) {
  59         debugs(20, 2, "storeClientReadHeader: swapin MD5 mismatch");
  60         // debugs(20, 2, "\t" << storeKeyText((const cache_key *)value));
  61         debugs(20, 2, "\t" << e->getMD5Text());
  62
  63         if (isPowTen(++md5_mismatches))
  64             debugs(20, DBG_IMPORTANT, "WARNING: " << md5_mismatches << " swapin MD5 mismatches");
  65
  66         return false;
  67     }
  68
  69     return true;
  70 }