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
39int
40svn_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
81svn_error_t *
82svn_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
111svn_error_t *
112svn_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}
136