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/* Copyright (C) 2009-2010 Codership Oy <info@codersihp.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
*/
/*! @file Dummy wsrep API implementation. */
#include "wsrep_api.h"
#include <errno.h>
#include <string.h>
/*! Dummy backend context. */
typedef struct wsrep_dummy
{
wsrep_log_cb_t log_fn;
char* options;
} wsrep_dummy_t;
/* Get pointer to wsrep_dummy context from wsrep_t pointer */
#define WSREP_DUMMY(_p) ((wsrep_dummy_t *) (_p)->ctx)
/* Trace function usage a-la DBUG */
#define WSREP_DBUG_ENTER(_w) do { \
if (WSREP_DUMMY(_w)) { \
if (WSREP_DUMMY(_w)->log_fn) \
WSREP_DUMMY(_w)->log_fn(WSREP_LOG_DEBUG, __FUNCTION__); \
} \
} while (0)
static void dummy_free(wsrep_t *w)
{
WSREP_DBUG_ENTER(w);
if (WSREP_DUMMY(w)->options) {
free(WSREP_DUMMY(w)->options);
WSREP_DUMMY(w)->options = NULL;
}
free(w->ctx);
w->ctx = NULL;
}
static wsrep_status_t dummy_init (wsrep_t* w,
const struct wsrep_init_args* args)
{
WSREP_DUMMY(w)->log_fn = args->logger_cb;
WSREP_DBUG_ENTER(w);
if (args->options) {
WSREP_DUMMY(w)->options = strdup(args->options);
}
return WSREP_OK;
}
static uint64_t dummy_capabilities (wsrep_t* w __attribute__((unused)))
{
return 0;
}
static wsrep_status_t dummy_options_set(
wsrep_t* w,
const char* conf)
{
WSREP_DBUG_ENTER(w);
if (WSREP_DUMMY(w)->options) {
free(WSREP_DUMMY(w)->options);
WSREP_DUMMY(w)->options = NULL;
}
if (conf) {
WSREP_DUMMY(w)->options = strdup(conf);
}
return WSREP_OK;
}
static char* dummy_options_get (wsrep_t* w)
{
char *options;
WSREP_DBUG_ENTER(w);
options= WSREP_DUMMY(w)->options;
if (options)
options= strdup(WSREP_DUMMY(w)->options);
return options;
}
static wsrep_status_t dummy_connect(
wsrep_t* w,
const char* name __attribute__((unused)),
const char* url __attribute__((unused)),
const char* donor __attribute__((unused)),
wsrep_bool_t bootstrap __attribute__((unused)))
{
WSREP_DBUG_ENTER(w);
return WSREP_OK;
}
static wsrep_status_t dummy_disconnect(wsrep_t* w)
{
WSREP_DBUG_ENTER(w);
return WSREP_OK;
}
static wsrep_status_t dummy_recv(wsrep_t* w,
void* recv_ctx __attribute__((unused)))
{
WSREP_DBUG_ENTER(w);
return WSREP_OK;
}
static wsrep_status_t dummy_pre_commit(
wsrep_t* w,
const wsrep_conn_id_t conn_id __attribute__((unused)),
wsrep_ws_handle_t* ws_handle __attribute__((unused)),
uint32_t flags __attribute__((unused)),
wsrep_trx_meta_t* meta __attribute__((unused)))
{
WSREP_DBUG_ENTER(w);
return WSREP_OK;
}
static wsrep_status_t dummy_post_commit(
wsrep_t* w,
wsrep_ws_handle_t* ws_handle __attribute__((unused)))
{
WSREP_DBUG_ENTER(w);
return WSREP_OK;
}
static wsrep_status_t dummy_post_rollback(
wsrep_t* w,
wsrep_ws_handle_t* ws_handle __attribute__((unused)))
{
WSREP_DBUG_ENTER(w);
return WSREP_OK;
}
static wsrep_status_t dummy_replay_trx(
wsrep_t* w,
wsrep_ws_handle_t* ws_handle __attribute__((unused)),
void* trx_ctx __attribute__((unused)))
{
WSREP_DBUG_ENTER(w);
return WSREP_OK;
}
static wsrep_status_t dummy_abort_pre_commit(
wsrep_t* w,
const wsrep_seqno_t bf_seqno __attribute__((unused)),
const wsrep_trx_id_t trx_id __attribute__((unused)))
{
WSREP_DBUG_ENTER(w);
return WSREP_OK;
}
static wsrep_status_t dummy_append_key(
wsrep_t* w,
wsrep_ws_handle_t* ws_handle __attribute__((unused)),
const wsrep_key_t* key __attribute__((unused)),
const size_t key_num __attribute__((unused)),
const wsrep_key_type_t key_type __attribute__((unused)),
const wsrep_bool_t copy __attribute__((unused)))
{
WSREP_DBUG_ENTER(w);
return WSREP_OK;
}
static wsrep_status_t dummy_append_data(
wsrep_t* w,
wsrep_ws_handle_t* ws_handle __attribute__((unused)),
const struct wsrep_buf* data __attribute__((unused)),
const size_t count __attribute__((unused)),
const wsrep_data_type_t type __attribute__((unused)),
const wsrep_bool_t copy __attribute__((unused)))
{
WSREP_DBUG_ENTER(w);
return WSREP_OK;
}
static wsrep_status_t dummy_causal_read(
wsrep_t* w,
wsrep_gtid_t* gtid __attribute__((unused)))
{
WSREP_DBUG_ENTER(w);
return WSREP_OK;
}
static wsrep_status_t dummy_free_connection(
wsrep_t* w,
const wsrep_conn_id_t conn_id __attribute__((unused)))
{
WSREP_DBUG_ENTER(w);
return WSREP_OK;
}
static wsrep_status_t dummy_to_execute_start(
wsrep_t* w,
const wsrep_conn_id_t conn_id __attribute__((unused)),
const wsrep_key_t* key __attribute__((unused)),
const size_t key_num __attribute__((unused)),
const struct wsrep_buf* data __attribute__((unused)),
const size_t count __attribute__((unused)),
wsrep_trx_meta_t* meta __attribute__((unused)))
{
WSREP_DBUG_ENTER(w);
return WSREP_OK;
}
static wsrep_status_t dummy_to_execute_end(
wsrep_t* w,
const wsrep_conn_id_t conn_id __attribute__((unused)))
{
WSREP_DBUG_ENTER(w);
return WSREP_OK;
}
static wsrep_status_t dummy_preordered_collect(
wsrep_t* w,
wsrep_po_handle_t* handle __attribute__((unused)),
const struct wsrep_buf* data __attribute__((unused)),
size_t count __attribute__((unused)),
wsrep_bool_t copy __attribute__((unused)))
{
WSREP_DBUG_ENTER(w);
return WSREP_OK;
}
static wsrep_status_t dummy_preordered_commit(
wsrep_t* w,
wsrep_po_handle_t* handle __attribute__((unused)),
const wsrep_uuid_t* source_id __attribute__((unused)),
uint32_t flags __attribute__((unused)),
int pa_range __attribute__((unused)),
wsrep_bool_t commit __attribute__((unused)))
{
WSREP_DBUG_ENTER(w);
return WSREP_OK;
}
static wsrep_status_t dummy_sst_sent(
wsrep_t* w,
const wsrep_gtid_t* state_id __attribute__((unused)),
const int rcode __attribute__((unused)))
{
WSREP_DBUG_ENTER(w);
return WSREP_OK;
}
static wsrep_status_t dummy_sst_received(
wsrep_t* w,
const wsrep_gtid_t* state_id __attribute__((unused)),
const void* state __attribute__((unused)),
const size_t state_len __attribute__((unused)),
const int rcode __attribute__((unused)))
{
WSREP_DBUG_ENTER(w);
return WSREP_OK;
}
static wsrep_status_t dummy_snapshot(
wsrep_t* w,
const void* msg __attribute__((unused)),
const size_t msg_len __attribute__((unused)),
const char* donor_spec __attribute__((unused)))
{
WSREP_DBUG_ENTER(w);
return WSREP_OK;
}
static struct wsrep_stats_var dummy_stats[] = {
{ NULL, WSREP_VAR_STRING, { 0 } }
};
static struct wsrep_stats_var* dummy_stats_get (wsrep_t* w)
{
WSREP_DBUG_ENTER(w);
return dummy_stats;
}
static void dummy_stats_free (
wsrep_t* w,
struct wsrep_stats_var* stats __attribute__((unused)))
{
WSREP_DBUG_ENTER(w);
}
static void dummy_stats_reset (wsrep_t* w)
{
WSREP_DBUG_ENTER(w);
}
static wsrep_seqno_t dummy_pause (wsrep_t* w)
{
WSREP_DBUG_ENTER(w);
return -ENOSYS;
}
static wsrep_status_t dummy_resume (wsrep_t* w)
{
WSREP_DBUG_ENTER(w);
return WSREP_OK;
}
static wsrep_status_t dummy_desync (wsrep_t* w)
{
WSREP_DBUG_ENTER(w);
return WSREP_NOT_IMPLEMENTED;
}
static wsrep_status_t dummy_resync (wsrep_t* w)
{
WSREP_DBUG_ENTER(w);
return WSREP_OK;
}
static wsrep_status_t dummy_lock (wsrep_t* w,
const char* s __attribute__((unused)),
wsrep_bool_t r __attribute__((unused)),
uint64_t o __attribute__((unused)),
int64_t t __attribute__((unused)))
{
WSREP_DBUG_ENTER(w);
return WSREP_NOT_IMPLEMENTED;
}
static wsrep_status_t dummy_unlock (wsrep_t* w,
const char* s __attribute__((unused)),
uint64_t o __attribute__((unused)))
{
WSREP_DBUG_ENTER(w);
return WSREP_OK;
}
static wsrep_bool_t dummy_is_locked (wsrep_t* w,
const char* s __attribute__((unused)),
uint64_t* o __attribute__((unused)),
wsrep_uuid_t* t __attribute__((unused)))
{
WSREP_DBUG_ENTER(w);
return 0;
}
static wsrep_t dummy_iface = {
WSREP_INTERFACE_VERSION,
&dummy_init,
&dummy_capabilities,
&dummy_options_set,
&dummy_options_get,
&dummy_connect,
&dummy_disconnect,
&dummy_recv,
&dummy_pre_commit,
&dummy_post_commit,
&dummy_post_rollback,
&dummy_replay_trx,
&dummy_abort_pre_commit,
&dummy_append_key,
&dummy_append_data,
&dummy_causal_read,
&dummy_free_connection,
&dummy_to_execute_start,
&dummy_to_execute_end,
&dummy_preordered_collect,
&dummy_preordered_commit,
&dummy_sst_sent,
&dummy_sst_received,
&dummy_snapshot,
&dummy_stats_get,
&dummy_stats_free,
&dummy_stats_reset,
&dummy_pause,
&dummy_resume,
&dummy_desync,
&dummy_resync,
&dummy_lock,
&dummy_unlock,
&dummy_is_locked,
WSREP_NONE,
WSREP_INTERFACE_VERSION,
"Codership Oy <info@codership.com>",
&dummy_free,
NULL,
NULL
};
int wsrep_dummy_loader(wsrep_t* w)
{
if (!w)
return EINVAL;
*w = dummy_iface;
// allocate private context
if (!(w->ctx = malloc(sizeof(wsrep_dummy_t))))
return ENOMEM;
// initialize private context
WSREP_DUMMY(w)->log_fn = NULL;
WSREP_DUMMY(w)->options = NULL;
return 0;
}
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