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 static int
  17 bdb2i_enter_backend( 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_enter_backend_r( DB_ENV *dbEnv, DB_LOCK *lock )
  80 {
  81         return( bdb2i_enter_backend( dbEnv, lock, 0 ));
  82 }
  83
  84
  85 int
  86 bdb2i_enter_backend_w( DB_ENV *dbEnv, DB_LOCK *lock )
  87 {
  88         return( bdb2i_enter_backend( dbEnv, lock, 1 ));
  89 }
  90
  91
  92 int
  93 bdb2i_leave_backend( DB_ENV *dbEnv, DB_LOCK lock )
  94 {
  95         int   ret = 0;
  96
  97         switch ( slapMode ) {
  98
  99                 case SLAP_SERVER_MODE:
 100                 case SLAP_TIMEDSERVER_MODE:
 101                 case SLAP_TOOL_MODE:
 102                         switch( ( ret = lock_put( dbEnv->lk_info, lock ))) {
 103
 104                                 case 0:
 105                                         Debug( LDAP_DEBUG_TRACE,
 106                                                 "bdb2i_leave_backend() -- lock released\n",
 107                                                 0, 0, 0 );
 108                                         break;
 109
 110                                 case DB_LOCK_NOTHELD:
 111                                         Debug( LDAP_DEBUG_ANY,
 112                                                 "bdb2i_leave_backend() -- lock NOT held\n",
 113                                                 0, 0, 0 );
 114                                         break;
 115
 116                                 case DB_LOCK_DEADLOCK:
 117                                         Debug( LDAP_DEBUG_ANY,
 118                                                 "bdb2i_leave_backend() -- lock returned DEADLOCK\n",
 119                                                 0, 0, 0 );
 120                                         break;
 121
 122                                 default:
 123                                         Debug( LDAP_DEBUG_ANY,
 124                                                 "bdb2i_leave_backend() -- lock returned ERROR: %s\n",
 125                                                 strerror( errno ), 0, 0 );
 126                                         ret = errno;
 127                                         break;
 128
 129                         }
 130                         break;
 131         }
 132
 133         return( ret );
 134
 135 }
 136
 137