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php-src/ext/dba/dba_lmdb.c
George Peter Banyard 3c372901bd Add support to pass driver flags to DBA handlers 
Currently only LMDB with DBA_LMDB_USE_SUB_DIR/DBA_LMDB_NO_SUB_DIR are supported
2022-07-23 18:38:27 +01:00

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/*
+----------------------------------------------------------------------+
| Copyright (c) The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| https://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Author: Anatol Belski <ab@php.net> |
+----------------------------------------------------------------------+
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "php.h"
#ifdef DBA_LMDB
#include "php_lmdb.h"
#ifdef LMDB_INCLUDE_FILE
#include LMDB_INCLUDE_FILE
#endif
struct php_lmdb_info {
MDB_env *env;
MDB_txn *txn;
MDB_dbi dbi;
MDB_cursor *cur;
};
#define LMDB_IT(it) (((struct php_lmdb_info *)info->dbf)->it)
DBA_OPEN_FUNC(lmdb)
{
MDB_env *env;
MDB_txn *txn;
int rc;
int mode = info->file_permission;
zend_long map_size = info->map_size;
ZEND_ASSERT(map_size >= 0);
/* By default use the MDB_NOSUBDIR flag */
int flags = MDB_NOSUBDIR;
/* Use flags passed by the user for driver flags */
if (info->driver_flags != DBA_DEFAULT_DRIVER_FLAGS) {
ZEND_ASSERT(info->driver_flags >= 0);
switch (info->driver_flags) {
case 0:
case MDB_NOSUBDIR:
flags = info->driver_flags;
break;
default:
zend_argument_value_error(6, "must be either DBA_LMDB_USE_SUB_DIR or DBA_LMDB_NO_SUB_DIR for LMDB driver");
return FAILURE;
}
}
/* Add readonly flag if DB is opened in read only mode */
if (info->mode == DBA_READER) {
flags |= MDB_RDONLY;
}
rc = mdb_env_create(&env);
if (rc) {
*error = mdb_strerror(rc);
return FAILURE;
}
if (map_size > 0) {
rc = mdb_env_set_mapsize(env, (size_t) map_size);
if (rc) {
*error = mdb_strerror(rc);
return FAILURE;
}
}
rc = mdb_env_open(env, info->path, flags, mode);
if (rc) {
/* If this function [mdb_env_open()] fails, mdb_env_close() must be called to discard the MDB_env handle.
* http://www.lmdb.tech/doc/group__mdb.html#ga32a193c6bf4d7d5c5d579e71f22e9340 */
mdb_env_close(env);
*error = mdb_strerror(rc);
return FAILURE;
}
rc = mdb_txn_begin(env, NULL, /* flags */ MDB_RDONLY, &txn);
if (rc) {
mdb_env_close(env);
*error = mdb_strerror(rc);
return FAILURE;
}
info->dbf = pemalloc(sizeof(struct php_lmdb_info), info->flags & DBA_PERSISTENT);
if (!info->dbf) {
*error = "Failed to allocate php_lmdb_info.";
return FAILURE;
}
memset(info->dbf, 0, sizeof(struct php_lmdb_info));
rc = mdb_dbi_open(txn, NULL, 0, &LMDB_IT(dbi));
if (rc) {
mdb_env_close(env);
pefree(info->dbf, info->flags & DBA_PERSISTENT);
*error = mdb_strerror(rc);
return FAILURE;
}
LMDB_IT(env) = env;
LMDB_IT(txn) = txn;
mdb_txn_abort(LMDB_IT(txn));
return SUCCESS;
}
DBA_CLOSE_FUNC(lmdb)
{
mdb_dbi_close(LMDB_IT(env), LMDB_IT(dbi));
mdb_env_close(LMDB_IT(env));
pefree(info->dbf, info->flags & DBA_PERSISTENT);
}
DBA_FETCH_FUNC(lmdb)
{
int rc;
MDB_val k, v;
zend_string *ret = NULL;
if (LMDB_IT(cur)) {
rc = mdb_txn_renew(LMDB_IT(txn));
} else {
rc = mdb_txn_begin(LMDB_IT(env), NULL, MDB_RDONLY, &LMDB_IT(txn));
}
if (rc) {
php_error_docref(NULL, E_WARNING, "%s", mdb_strerror(rc));
return NULL;
}
k.mv_size = ZSTR_LEN(key);
k.mv_data = ZSTR_VAL(key);
rc = mdb_get(LMDB_IT(txn), LMDB_IT(dbi), &k, &v);
if (rc) {
if (MDB_NOTFOUND != rc) {
php_error_docref(NULL, E_WARNING, "%s", mdb_strerror(rc));
}
mdb_txn_abort(LMDB_IT(txn));
return NULL;
}
if (v.mv_data) {
ret = zend_string_init(v.mv_data, v.mv_size, /* persistent */ false);
}
if (LMDB_IT(cur)) {
mdb_txn_reset(LMDB_IT(txn));
} else {
mdb_txn_abort(LMDB_IT(txn));
}
return ret;
}
DBA_UPDATE_FUNC(lmdb)
{
int rc;
MDB_val k, v;
rc = mdb_txn_begin(LMDB_IT(env), NULL, 0, &LMDB_IT(txn));
if (rc) {
php_error_docref(NULL, E_WARNING, "%s", mdb_strerror(rc));
return FAILURE;
}
k.mv_size = ZSTR_LEN(key);
k.mv_data = ZSTR_VAL(key);
v.mv_size = ZSTR_LEN(val);
v.mv_data = ZSTR_VAL(val);
rc = mdb_put(LMDB_IT(txn), LMDB_IT(dbi), &k, &v, mode == 1 ? MDB_NOOVERWRITE : 0);
if (rc) {
if (MDB_KEYEXIST != rc) {
php_error_docref(NULL, E_WARNING, "%s", mdb_strerror(rc));
}
mdb_txn_abort(LMDB_IT(txn));
return FAILURE;
}
rc = mdb_txn_commit(LMDB_IT(txn));
if (rc) {
php_error_docref(NULL, E_WARNING, "%s", mdb_strerror(rc));
mdb_txn_abort(LMDB_IT(txn));
return FAILURE;
}
return SUCCESS;
}
DBA_EXISTS_FUNC(lmdb)
{
int rc;
MDB_val k, v;
if (LMDB_IT(cur)) {
rc = mdb_txn_renew(LMDB_IT(txn));
} else {
rc = mdb_txn_begin(LMDB_IT(env), NULL, MDB_RDONLY, &LMDB_IT(txn));
}
if (rc) {
php_error_docref(NULL, E_WARNING, "%s", mdb_strerror(rc));
return FAILURE;
}
k.mv_size = ZSTR_LEN(key);
k.mv_data = ZSTR_VAL(key);
rc = mdb_get(LMDB_IT(txn), LMDB_IT(dbi), &k, &v);
if (rc) {
if (MDB_NOTFOUND != rc) {
php_error_docref(NULL, E_WARNING, "%s", mdb_strerror(rc));
}
mdb_txn_abort(LMDB_IT(txn));
return FAILURE;
}
if (LMDB_IT(cur)) {
mdb_txn_reset(LMDB_IT(txn));
} else {
mdb_txn_abort(LMDB_IT(txn));
}
return SUCCESS;
}
DBA_DELETE_FUNC(lmdb)
{
int rc;
MDB_val k;
rc = mdb_txn_begin(LMDB_IT(env), NULL, 0, &LMDB_IT(txn));
if (rc) {
php_error_docref(NULL, E_WARNING, "%s", mdb_strerror(rc));
return FAILURE;
}
k.mv_size = ZSTR_LEN(key);
k.mv_data = ZSTR_VAL(key);
rc = mdb_del(LMDB_IT(txn), LMDB_IT(dbi), &k, NULL);
if (!rc) {
rc = mdb_txn_commit(LMDB_IT(txn));
if (rc) {
php_error_docref(NULL, E_WARNING, "%s", mdb_strerror(rc));
mdb_txn_abort(LMDB_IT(txn));
return FAILURE;
}
return SUCCESS;
}
php_error_docref(NULL, E_WARNING, "%s", mdb_strerror(rc));
mdb_txn_abort(LMDB_IT(txn));
return FAILURE;
}
DBA_FIRSTKEY_FUNC(lmdb)
{
int rc;
MDB_val k, v;
zend_string *ret = NULL;
rc = mdb_txn_begin(LMDB_IT(env), NULL, MDB_RDONLY, &LMDB_IT(txn));
if (rc) {
php_error_docref(NULL, E_WARNING, "%s", mdb_strerror(rc));
return NULL;
}
rc = mdb_cursor_open(LMDB_IT(txn), LMDB_IT(dbi), &LMDB_IT(cur));
if (rc) {
mdb_txn_abort(LMDB_IT(txn));
php_error_docref(NULL, E_WARNING, "%s", mdb_strerror(rc));
return NULL;
}
rc = mdb_cursor_get(LMDB_IT(cur), &k, &v, MDB_FIRST);
if (rc) {
mdb_txn_abort(LMDB_IT(txn));
mdb_cursor_close(LMDB_IT(cur));
LMDB_IT(cur) = NULL;
if (MDB_NOTFOUND != rc) {
php_error_docref(NULL, E_WARNING, "%s", mdb_strerror(rc));
}
return NULL;
}
if (k.mv_data) {
ret = zend_string_init(k.mv_data, k.mv_size, /* persistent */ false);
}
mdb_txn_reset(LMDB_IT(txn));
return ret;
}
DBA_NEXTKEY_FUNC(lmdb)
{
int rc;
MDB_val k, v;
zend_string *ret = NULL;
rc = mdb_txn_renew(LMDB_IT(txn));
if (rc) {
php_error_docref(NULL, E_WARNING, "%s", mdb_strerror(rc));
return NULL;
}
rc = mdb_cursor_get(LMDB_IT(cur), &k, &v, MDB_NEXT);
if (rc) {
mdb_txn_abort(LMDB_IT(txn));
mdb_cursor_close(LMDB_IT(cur));
LMDB_IT(cur) = NULL;
if (MDB_NOTFOUND != rc) {
php_error_docref(NULL, E_WARNING, "%s", mdb_strerror(rc));
}
return NULL;
}
if (k.mv_data) {
ret = zend_string_init(k.mv_data, k.mv_size, /* persistent */ false);
}
mdb_txn_reset(LMDB_IT(txn));
return ret;
}
DBA_OPTIMIZE_FUNC(lmdb)
{
return SUCCESS;
}
DBA_SYNC_FUNC(lmdb)
{
int rc;
rc = mdb_env_sync(LMDB_IT(env), 1);
if (rc) {
php_error_docref(NULL, E_WARNING, "%s", mdb_strerror(rc));
return FAILURE;
}
return SUCCESS;
}
DBA_INFO_FUNC(lmdb)
{
return estrdup(MDB_VERSION_STRING);
}
#endif
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