src/StoreMetaMD5.cc

   1 /*
   2  * Copyright (C) 1996-2020 The Squid Software Foundation and contributors
   3  *
   4  * Squid software is distributed under GPLv2+ license and includes
   5  * contributions from numerous individuals and organizations.
   6  * Please see the COPYING and CONTRIBUTORS files for details.
   7  */
   8
   9 /* DEBUG: section 20    Storage Manager Swapfile Metadata */
  10
  11 #include "squid.h"
  12 #include "int.h"
  13 #include "md5.h"
  14 #include "MemObject.h"
  15 #include "Store.h"
  16 #include "StoreMetaMD5.h"
  17
  18 bool
  19 StoreMetaMD5::validLength(int len) const
  20 {
  21     return len == SQUID_MD5_DIGEST_LENGTH;
  22 }
  23
  24 int StoreMetaMD5::md5_mismatches = 0;
  25
  26 bool
  27 StoreMetaMD5::checkConsistency(StoreEntry *e) const
  28 {
  29     assert (getType() == STORE_META_KEY_MD5);
  30     assert(length == SQUID_MD5_DIGEST_LENGTH);
  31
  32     if (!EBIT_TEST(e->flags, KEY_PRIVATE) &&
  33             memcmp(value, e->key, SQUID_MD5_DIGEST_LENGTH)) {
  34         debugs(20, 2, "storeClientReadHeader: swapin MD5 mismatch");
  35         // debugs(20, 2, "\t" << storeKeyText((const cache_key *)value));
  36         debugs(20, 2, "\t" << e->getMD5Text());
  37
  38         if (isPowTen(++md5_mismatches))
  39             debugs(20, DBG_IMPORTANT, "WARNING: " << md5_mismatches << " swapin MD5 mismatches");
  40
  41         return false;
  42     }
  43
  44     return true;
  45 }
  46