git.sur5r.net Git - openldap/blob - servers/slapd/back-bdb2/porter.c

   1 /* porter.c - port functions of the bdb2 backend */
   2
   3 #include "portable.h"
   4
   5 #include <stdio.h>
   6 #include <errno.h>
   7
   8 #include <ac/string.h>
   9
  10 #include "slap.h"
  11 #include "back-bdb2.h"
  12
  13 #define  PORTER_OBJ   "bdb2_backend"
  14
  15
  16 int
  17 bdb2i_enter_backend_rw( DB_ENV *dbEnv, DB_LOCK *lock, int writer )
  18 {
  19         u_int32_t      locker;
  20         db_lockmode_t  lock_type;
  21         DBT            lock_dbt;
  22         int            ret = 0;
  23
  24         switch ( slapMode ) {
  25
  26                 case SLAP_SERVER_MODE:
  27                 case SLAP_TIMEDSERVER_MODE:
  28                 case SLAP_TOOL_MODE:
  29                         if ( ( ret = lock_id( dbEnv->lk_info, &locker )) != 0 ) {
  30
  31                                 Debug( LDAP_DEBUG_ANY,
  32                                         "bdb2i_enter_backend(): unable to get locker id -- %s\n",
  33                                         strerror( ret ), 0, 0 );
  34                                 return( ret );
  35
  36                         }
  37
  38                         lock_type     = writer ? DB_LOCK_WRITE : DB_LOCK_READ;
  39                         lock_dbt.data = PORTER_OBJ;
  40                         lock_dbt.size = strlen( PORTER_OBJ );
  41
  42                         switch ( ( ret = lock_get( dbEnv->lk_info, locker, 0, &lock_dbt,
  43                                                         lock_type, lock ))) {
  44
  45                                 case 0:
  46                                         Debug( LDAP_DEBUG_TRACE,
  47                                                 "bdb2i_enter_backend() -- %s lock granted\n",
  48                                                 writer ? "write" : "read", 0, 0 );
  49                                         break;
  50
  51                                 case DB_LOCK_NOTGRANTED:
  52                                         Debug( LDAP_DEBUG_ANY,
  53                                                 "bdb2i_enter_backend() -- %s lock NOT granted\n",
  54                                                 writer ? "write" : "read", 0, 0 );
  55                                         break;
  56
  57                                 case DB_LOCK_DEADLOCK:
  58                                         Debug( LDAP_DEBUG_ANY,
  59                                                 "bdb2i_enter_backend() -- %s lock returned DEADLOCK\n",
  60                                                 writer ? "write" : "read", 0, 0 );
  61                                         break;
  62
  63                                 default:
  64                                         Debug( LDAP_DEBUG_ANY,
  65                                                 "bdb2i_enter_backend() -- %s lock returned ERROR: %s\n",
  66                                                 writer ? "write" : "read", strerror( errno ), 0 );
  67                                         ret = errno;
  68                                         break;
  69
  70                         }
  71                         break;
  72         }
  73
  74         return( ret );
  75 }
  76
  77
  78 int
  79 bdb2i_leave_backend_rw( DB_ENV *dbEnv, DB_LOCK lock, int writer )
  80 {
  81         int   ret = 0;
  82
  83         switch ( slapMode ) {
  84
  85                 case SLAP_SERVER_MODE:
  86                 case SLAP_TIMEDSERVER_MODE:
  87                 case SLAP_TOOL_MODE:
  88                         switch( ( ret = lock_put( dbEnv->lk_info, lock ))) {
  89
  90                                 case 0:
  91                                         Debug( LDAP_DEBUG_TRACE,
  92                                                 "bdb2i_leave_backend() -- %s lock released\n",
  93                                                 writer ? "write" : "read", 0, 0 );
  94                                         break;
  95
  96                                 case DB_LOCK_NOTHELD:
  97                                         Debug( LDAP_DEBUG_ANY,
  98                                                 "bdb2i_leave_backend() -- %s lock NOT held\n",
  99                                                 writer ? "write" : "read", 0, 0 );
 100                                         break;
 101
 102                                 case DB_LOCK_DEADLOCK:
 103                                         Debug( LDAP_DEBUG_ANY,
 104                                                 "bdb2i_leave_backend() -- %s lock returned DEADLOCK\n",
 105                                                 writer ? "write" : "read", 0, 0 );
 106                                         break;
 107
 108                                 default:
 109                                         Debug( LDAP_DEBUG_ANY,
 110                                                 "bdb2i_leave_backend() -- %s lock returned ERROR: %s\n",
 111                                                 writer ? "write" : "read", strerror( errno ), 0 );
 112                                         ret = errno;
 113                                         break;
 114
 115                         }
 116                         break;
 117         }
 118
 119         return( ret );
 120
 121 }
 122
 123