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/* copies-table.c : operations on the `copies' table
*
* ====================================================================
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
* ====================================================================
*/
#include <string.h>
#include "bdb_compat.h"
#include "private/svn_skel.h"
#include "../fs.h"
#include "../err.h"
#include "../key-gen.h"
#include "dbt.h"
#include "../util/fs_skels.h"
#include "../trail.h"
#include "../../libsvn_fs/fs-loader.h"
#include "bdb-err.h"
#include "copies-table.h"
#include "rev-table.h"
#include "svn_private_config.h"
int
svn_fs_bdb__open_copies_table(DB **copies_p,
DB_ENV *env,
svn_boolean_t create)
{
const u_int32_t open_flags = (create ? (DB_CREATE | DB_EXCL) : 0);
DB *copies;
BDB_ERR(svn_fs_bdb__check_version());
BDB_ERR(db_create(&copies, env, 0));
BDB_ERR((copies->open)(SVN_BDB_OPEN_PARAMS(copies, NULL),
"copies", 0, DB_BTREE,
open_flags, 0666));
/* Create the initial `next-key' table entry. */
if (create)
{
DBT key, value;
BDB_ERR(copies->put(copies, 0,
svn_fs_base__str_to_dbt(&key, NEXT_KEY_KEY),
svn_fs_base__str_to_dbt(&value, "0"), 0));
}
*copies_p = copies;
return 0;
}
/* Store COPY as a copy named COPY_ID in FS as part of TRAIL. */
/* ### only has one caller; might not need to be abstracted */
static svn_error_t *
put_copy(svn_fs_t *fs,
const copy_t *copy,
const char *copy_id,
trail_t *trail,
apr_pool_t *pool)
{
base_fs_data_t *bfd = fs->fsap_data;
svn_skel_t *copy_skel;
DBT key, value;
/* Convert native type to skel. */
SVN_ERR(svn_fs_base__unparse_copy_skel(©_skel, copy, pool));
/* Only in the context of this function do we know that the DB call
will not attempt to modify COPY_ID, so the cast belongs here. */
svn_fs_base__str_to_dbt(&key, copy_id);
svn_fs_base__skel_to_dbt(&value, copy_skel, pool);
svn_fs_base__trail_debug(trail, "copies", "put");
return BDB_WRAP(fs, N_("storing copy record"),
bfd->copies->put(bfd->copies, trail->db_txn,
&key, &value, 0));
}
svn_error_t *
svn_fs_bdb__reserve_copy_id(const char **id_p,
svn_fs_t *fs,
trail_t *trail,
apr_pool_t *pool)
{
base_fs_data_t *bfd = fs->fsap_data;
DBT query, result;
apr_size_t len;
char next_key[MAX_KEY_SIZE];
int db_err;
svn_fs_base__str_to_dbt(&query, NEXT_KEY_KEY);
/* Get the current value associated with the `next-key' key in the
copies table. */
svn_fs_base__trail_debug(trail, "copies", "get");
SVN_ERR(BDB_WRAP(fs, N_("allocating new copy ID (getting 'next-key')"),
bfd->copies->get(bfd->copies, trail->db_txn, &query,
svn_fs_base__result_dbt(&result),
0)));
svn_fs_base__track_dbt(&result, pool);
/* Set our return value. */
*id_p = apr_pstrmemdup(pool, result.data, result.size);
/* Bump to future key. */
len = result.size;
svn_fs_base__next_key(result.data, &len, next_key);
svn_fs_base__trail_debug(trail, "copies", "put");
db_err = bfd->copies->put(bfd->copies, trail->db_txn,
svn_fs_base__str_to_dbt(&query, NEXT_KEY_KEY),
svn_fs_base__str_to_dbt(&result, next_key),
0);
return BDB_WRAP(fs, N_("bumping next copy key"), db_err);
}
svn_error_t *
svn_fs_bdb__create_copy(svn_fs_t *fs,
const char *copy_id,
const char *src_path,
const char *src_txn_id,
const svn_fs_id_t *dst_noderev_id,
copy_kind_t kind,
trail_t *trail,
apr_pool_t *pool)
{
copy_t copy;
copy.kind = kind;
copy.src_path = src_path;
copy.src_txn_id = src_txn_id;
copy.dst_noderev_id = dst_noderev_id;
return put_copy(fs, ©, copy_id, trail, pool);
}
svn_error_t *
svn_fs_bdb__delete_copy(svn_fs_t *fs,
const char *copy_id,
trail_t *trail,
apr_pool_t *pool)
{
base_fs_data_t *bfd = fs->fsap_data;
DBT key;
int db_err;
svn_fs_base__str_to_dbt(&key, copy_id);
svn_fs_base__trail_debug(trail, "copies", "del");
db_err = bfd->copies->del(bfd->copies, trail->db_txn, &key, 0);
if (db_err == DB_NOTFOUND)
return svn_fs_base__err_no_such_copy(fs, copy_id);
return BDB_WRAP(fs, N_("deleting entry from 'copies' table"), db_err);
}
svn_error_t *
svn_fs_bdb__get_copy(copy_t **copy_p,
svn_fs_t *fs,
const char *copy_id,
trail_t *trail,
apr_pool_t *pool)
{
base_fs_data_t *bfd = fs->fsap_data;
DBT key, value;
int db_err;
svn_skel_t *skel;
copy_t *copy;
/* Only in the context of this function do we know that the DB call
will not attempt to modify copy_id, so the cast belongs here. */
svn_fs_base__trail_debug(trail, "copies", "get");
db_err = bfd->copies->get(bfd->copies, trail->db_txn,
svn_fs_base__str_to_dbt(&key, copy_id),
svn_fs_base__result_dbt(&value),
0);
svn_fs_base__track_dbt(&value, pool);
if (db_err == DB_NOTFOUND)
return svn_fs_base__err_no_such_copy(fs, copy_id);
SVN_ERR(BDB_WRAP(fs, N_("reading copy"), db_err));
/* Unparse COPY skel */
skel = svn_skel__parse(value.data, value.size, pool);
if (! skel)
return svn_fs_base__err_corrupt_copy(fs, copy_id);
/* Convert skel to native type. */
SVN_ERR(svn_fs_base__parse_copy_skel(©, skel, pool));
*copy_p = copy;
return SVN_NO_ERROR;
}
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