src/StoreMetaMD5.cc

   1
   2 /*
   3  * DEBUG: section 20    Storage Manager Swapfile Metadata
   4  * AUTHOR: Kostas Anagnostakis
   5  *
   6  * SQUID Web Proxy Cache          http://www.squid-cache.org/
   7  * ----------------------------------------------------------
   8  *
   9  *  Squid is the result of efforts by numerous individuals from
  10  *  the Internet community; see the CONTRIBUTORS file for full
  11  *  details.   Many organizations have provided support for Squid's
  12  *  development; see the SPONSORS file for full details.  Squid is
  13  *  Copyrighted (C) 2001 by the Regents of the University of
  14  *  California; see the COPYRIGHT file for full details.  Squid
  15  *  incorporates software developed and/or copyrighted by other
  16  *  sources; see the CREDITS file for full details.
  17  *
  18  *  This program is free software; you can redistribute it and/or modify
  19  *  it under the terms of the GNU General Public License as published by
  20  *  the Free Software Foundation; either version 2 of the License, or
  21  *  (at your option) any later version.
  22  *
  23  *  This program is distributed in the hope that it will be useful,
  24  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  25  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26  *  GNU General Public License for more details.
  27  *
  28  *  You should have received a copy of the GNU General Public License
  29  *  along with this program; if not, write to the Free Software
  30  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
  31  *
  32  */
  33
  34 #include "squid.h"
  35 #include "int.h"
  36 #include "md5.h"
  37 #include "MemObject.h"
  38 #include "Store.h"
  39 #include "StoreMetaMD5.h"
  40
  41 bool
  42 StoreMetaMD5::validLength(int len) const
  43 {
  44     return len == SQUID_MD5_DIGEST_LENGTH;
  45 }
  46
  47 int StoreMetaMD5::md5_mismatches = 0;
  48
  49 bool
  50 StoreMetaMD5::checkConsistency(StoreEntry *e) const
  51 {
  52     assert (getType() == STORE_META_KEY_MD5);
  53     assert(length == SQUID_MD5_DIGEST_LENGTH);
  54
  55     if (!EBIT_TEST(e->flags, KEY_PRIVATE) &&
  56             memcmp(value, e->key, SQUID_MD5_DIGEST_LENGTH)) {
  57         debugs(20, 2, "storeClientReadHeader: swapin MD5 mismatch");
  58         // debugs(20, 2, "\t" << storeKeyText((const cache_key *)value));
  59         debugs(20, 2, "\t" << e->getMD5Text());
  60
  61         if (isPowTen(++md5_mismatches))
  62             debugs(20, DBG_IMPORTANT, "WARNING: " << md5_mismatches << " swapin MD5 mismatches");
  63
  64         return false;
  65     }
  66
  67     return true;
  68 }