contrib/subversion/subversion/libsvn_fs_base/bdb/miscellaneous-table.c

   1 /* miscellaneous-table.c : operations on the `miscellaneous' table
   2  *
   3  * ====================================================================
   4  *    Licensed to the Apache Software Foundation (ASF) under one
   5  *    or more contributor license agreements.  See the NOTICE file
   6  *    distributed with this work for additional information
   7  *    regarding copyright ownership.  The ASF licenses this file
   8  *    to you under the Apache License, Version 2.0 (the
   9  *    "License"); you may not use this file except in compliance
  10  *    with the License.  You may obtain a copy of the License at
  11  *
  12  *      http://www.apache.org/licenses/LICENSE-2.0
  13  *
  14  *    Unless required by applicable law or agreed to in writing,
  15  *    software distributed under the License is distributed on an
  16  *    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  17  *    KIND, either express or implied.  See the License for the
  18  *    specific language governing permissions and limitations
  19  *    under the License.
  20  * ====================================================================
  21  */
  22
  23 #include <string.h>
  24 #include <assert.h>
  25 #include "bdb_compat.h"
  26
  27 #include "svn_pools.h"
  28 #include "dbt.h"
  29 #include "../err.h"
  30 #include "../fs.h"
  31 #include "../trail.h"
  32 #include "../../libsvn_fs/fs-loader.h"
  33 #include "bdb-err.h"
  34 #include "miscellaneous-table.h"
  35
  36 #include "private/svn_fs_util.h"
  37
  38
  39 int
  40 svn_fs_bdb__open_miscellaneous_table(DB **miscellaneous_p,
  41                                      DB_ENV *env,
  42                                      svn_boolean_t create)
  43 {
  44   const u_int32_t open_flags = (create ? (DB_CREATE | DB_EXCL) : 0);
  45   DB *miscellaneous;
  46   int error;
  47
  48   BDB_ERR(svn_fs_bdb__check_version());
  49   BDB_ERR(db_create(&miscellaneous, env, 0));
  50   error = (miscellaneous->open)(SVN_BDB_OPEN_PARAMS(miscellaneous, NULL),
  51                                 "miscellaneous", 0, DB_BTREE,
  52                                 open_flags, 0666);
  53
  54   /* Create the table if it doesn't yet exist.  This is a form of
  55      automagical repository upgrading. */
  56   if (error == ENOENT && (! create))
  57     {
  58       BDB_ERR(miscellaneous->close(miscellaneous, 0));
  59       return svn_fs_bdb__open_miscellaneous_table(miscellaneous_p, env, TRUE);
  60     }
  61   BDB_ERR(error);
  62
  63   /* If we're creating the table from scratch (not upgrading), record the
  64      upgrade rev as 0. */
  65   if (create)
  66     {
  67       DBT key, value;
  68
  69       BDB_ERR(miscellaneous->put
  70               (miscellaneous, 0,
  71                svn_fs_base__str_to_dbt
  72                (&key, SVN_FS_BASE__MISC_FORWARD_DELTA_UPGRADE),
  73                svn_fs_base__str_to_dbt(&value, "0"), 0));
  74     }
  75
  76   *miscellaneous_p = miscellaneous;
  77   return 0;
  78 }
  79
  80
  81 svn_error_t *
  82 svn_fs_bdb__miscellaneous_set(svn_fs_t *fs,
  83                               const char *key_str,
  84                               const char *val,
  85                               trail_t *trail,
  86                               apr_pool_t *pool)
  87 {
  88   base_fs_data_t *bfd = fs->fsap_data;
  89   DBT key, value;
  90
  91   svn_fs_base__str_to_dbt(&key, key_str);
  92   if (val == NULL)
  93     {
  94       svn_fs_base__trail_debug(trail, "miscellaneous", "del");
  95       return BDB_WRAP(fs, N_("deleting record from 'miscellaneous' table"),
  96                       bfd->miscellaneous->del(bfd->miscellaneous,
  97                                               trail->db_txn, &key, 0));
  98     }
  99   else
 100     {
 101       svn_fs_base__str_to_dbt(&value, val);
 102       svn_fs_base__trail_debug(trail, "miscellaneous", "add");
 103       return BDB_WRAP(fs, N_("storing miscellaneous record"),
 104                       bfd->miscellaneous->put(bfd->miscellaneous,
 105                                               trail->db_txn,
 106                                               &key, &value, 0));
 107     }
 108 }
 109
 110
 111 svn_error_t *
 112 svn_fs_bdb__miscellaneous_get(const char **val,
 113                               svn_fs_t *fs,
 114                               const char *key_str,
 115                               trail_t *trail,
 116                               apr_pool_t *pool)
 117 {
 118   base_fs_data_t *bfd = fs->fsap_data;
 119   DBT key, value;
 120   int db_err;
 121
 122   *val = NULL;
 123   svn_fs_base__trail_debug(trail, "miscellaneous", "get");
 124   db_err = bfd->miscellaneous->get(bfd->miscellaneous, trail->db_txn,
 125                                    svn_fs_base__str_to_dbt(&key, key_str),
 126                                    svn_fs_base__result_dbt(&value), 0);
 127   svn_fs_base__track_dbt(&value, pool);
 128
 129   if (db_err != DB_NOTFOUND)
 130     {
 131       SVN_ERR(BDB_WRAP(fs, N_("fetching miscellaneous record"), db_err));
 132       *val = apr_pstrmemdup(pool, value.data, value.size);
 133     }
 134   return SVN_NO_ERROR;
 135 }