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frontend.c
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frontend.c
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/*
* Odyssey.
*
* Scalable PostgreSQL connection pooler.
*/
#include <kiwi.h>
#include <machinarium.h>
#include <odyssey.h>
static inline void od_frontend_close(od_client_t *client)
{
assert(client->route == NULL);
assert(client->server == NULL);
od_router_t *router = client->global->router;
od_atomic_u32_dec(&router->clients);
od_io_close(&client->io);
if (client->notify_io) {
machine_close(client->notify_io);
machine_io_free(client->notify_io);
client->notify_io = NULL;
}
od_client_free(client);
}
int od_frontend_info(od_client_t *client, char *fmt, ...)
{
va_list args;
va_start(args, fmt);
machine_msg_t *msg;
msg = od_frontend_info_msg(client, NULL, fmt, args);
va_end(args);
if (msg == NULL) {
return -1;
}
return od_write(&client->io, msg);
}
int od_frontend_error(od_client_t *client, char *code, char *fmt, ...)
{
va_list args;
va_start(args, fmt);
machine_msg_t *msg;
msg = od_frontend_error_msg(client, NULL, code, fmt, args);
va_end(args);
if (msg == NULL) {
return -1;
}
return od_write(&client->io, msg);
}
int od_frontend_fatal(od_client_t *client, char *code, char *fmt, ...)
{
va_list args;
va_start(args, fmt);
machine_msg_t *msg;
msg = od_frontend_fatal_msg(client, NULL, code, fmt, args);
va_end(args);
if (msg == NULL)
return -1;
return od_write(&client->io, msg);
}
static inline int od_frontend_error_fwd(od_client_t *client)
{
od_server_t *server = client->server;
assert(server != NULL);
assert(server->error_connect != NULL);
kiwi_fe_error_t error;
int rc;
rc = kiwi_fe_read_error(machine_msg_data(server->error_connect),
machine_msg_size(server->error_connect),
&error);
if (rc == -1)
return -1;
char text[512];
int text_len;
text_len =
od_snprintf(text, sizeof(text), "odyssey: %s%.*s: %s",
client->id.id_prefix, (signed)sizeof(client->id.id),
client->id.id, error.message);
int detail_len = error.detail ? strlen(error.detail) : 0;
int hint_len = error.hint ? strlen(error.hint) : 0;
machine_msg_t *msg;
msg = kiwi_be_write_error_as(NULL, error.severity, error.code,
error.detail, detail_len, error.hint,
hint_len, text, text_len);
if (msg == NULL)
return -1;
return od_write(&client->io, msg);
}
static inline bool
od_frontend_error_is_too_many_connections(od_client_t *client)
{
od_server_t *server = client->server;
assert(server != NULL);
if (server->error_connect == NULL)
return false;
kiwi_fe_error_t error;
int rc;
rc = kiwi_fe_read_error(machine_msg_data(server->error_connect),
machine_msg_size(server->error_connect),
&error);
if (rc == -1)
return false;
return strcmp(error.code, KIWI_TOO_MANY_CONNECTIONS) == 0;
}
static int od_frontend_startup(od_client_t *client)
{
od_instance_t *instance = client->global->instance;
machine_msg_t *msg;
for (uint32_t startup_attempt = 0;
startup_attempt < MAX_STARTUP_ATTEMPTS; startup_attempt++) {
msg = od_read_startup(
&client->io,
client->config_listen->client_login_timeout);
if (msg == NULL)
goto error;
int rc = kiwi_be_read_startup(machine_msg_data(msg),
machine_msg_size(msg),
&client->startup, &client->vars);
machine_msg_free(msg);
if (rc == -1)
goto error;
if (!client->startup.unsupported_request)
break;
/* not supported 'N' */
msg = machine_msg_create(sizeof(uint8_t));
if (msg == NULL)
return -1;
uint8_t *type = machine_msg_data(msg);
*type = 'N';
rc = od_write(&client->io, msg);
if (rc == -1) {
od_error(&instance->logger,
"unsupported protocol (gssapi)", client, NULL,
"write error: %s", od_io_error(&client->io));
return -1;
}
od_debug(&instance->logger, "unsupported protocol (gssapi)",
client, NULL, "ignoring");
}
/* client ssl request */
int rc = od_tls_frontend_accept(client, &instance->logger,
client->config_listen, client->tls);
if (rc == -1)
goto error;
if (!client->startup.is_ssl_request) {
rc = od_compression_frontend_setup(
client, client->config_listen, &instance->logger);
if (rc == -1)
return -1;
return 0;
}
/* read startup-cancel message followed after ssl
* negotiation */
assert(client->startup.is_ssl_request);
msg = od_read_startup(&client->io,
client->config_listen->client_login_timeout);
if (msg == NULL)
return -1;
rc = kiwi_be_read_startup(machine_msg_data(msg), machine_msg_size(msg),
&client->startup, &client->vars);
machine_msg_free(msg);
if (rc == -1)
goto error;
rc = od_compression_frontend_setup(client, client->config_listen,
&instance->logger);
if (rc == -1) {
return -1;
}
return 0;
error:
od_debug(&instance->logger, "startup", client, NULL,
"startup packet read error");
od_cron_t *cron = client->global->cron;
od_atomic_u64_inc(&cron->startup_errors);
return -1;
}
static inline od_frontend_status_t
od_frontend_attach(od_client_t *client, char *context,
kiwi_params_t *route_params)
{
od_instance_t *instance = client->global->instance;
od_router_t *router = client->global->router;
od_route_t *route = client->route;
if (route->rule->pool->reserve_prepared_statement) {
client->relay.require_full_prep_stmt = 1;
}
bool wait_for_idle = false;
for (;;) {
od_router_status_t status;
status = od_router_attach(router, client, wait_for_idle);
if (status != OD_ROUTER_OK) {
if (status == OD_ROUTER_ERROR_TIMEDOUT) {
od_error(&instance->logger, "router", client,
NULL,
"server pool wait timed out, closing");
return OD_EATTACH_TOO_MANY_CONNECTIONS;
}
return OD_EATTACH;
}
od_server_t *server = client->server;
if (server->io.io && !machine_connected(server->io.io)) {
od_log(&instance->logger, context, client, server,
"server disconnected, close connection and retry attach");
od_router_close(router, client);
continue;
}
od_debug(&instance->logger, context, client, server,
"client %s%.*s attached to %s%.*s",
client->id.id_prefix,
(int)sizeof(client->id.id_prefix), client->id.id,
server->id.id_prefix,
(int)sizeof(server->id.id_prefix), server->id.id);
assert(od_server_synchronized(server));
assert(server->relay.iov == 0 ||
!machine_iov_pending(server->relay.iov));
/* connect to server, if necessary */
if (server->io.io) {
return OD_OK;
}
int rc;
od_atomic_u32_inc(&router->servers_routing);
rc = od_backend_connect(server, context, route_params, client);
od_atomic_u32_dec(&router->servers_routing);
if (rc == -1) {
/* In case of 'too many connections' error, retry attach attempt by
* waiting for a idle server connection for pool_timeout ms
*/
wait_for_idle =
route->rule->pool->timeout > 0 &&
od_frontend_error_is_too_many_connections(
client);
if (wait_for_idle) {
od_router_close(router, client);
if (instance->config.server_login_retry) {
machine_sleep(
instance->config
.server_login_retry);
}
continue;
}
return OD_ESERVER_CONNECT;
}
return OD_OK;
}
}
static inline od_frontend_status_t
od_frontend_attach_and_deploy(od_client_t *client, char *context)
{
/* attach and maybe connect server */
od_frontend_status_t status;
status = od_frontend_attach(client, context, NULL);
if (status != OD_OK)
return status;
od_server_t *server = client->server;
/* configure server using client parameters */
int rc;
rc = od_deploy(client, context);
if (rc == -1)
return OD_ESERVER_WRITE;
/* set number of replies to discard */
server->deploy_sync = rc;
od_server_sync_request(server, server->deploy_sync);
return OD_OK;
}
static inline od_frontend_status_t od_frontend_setup_params(od_client_t *client)
{
od_instance_t *instance = client->global->instance;
od_router_t *router = client->global->router;
od_route_t *route = client->route;
/* ensure route has cached server parameters */
int rc;
rc = kiwi_params_lock_count(&route->params);
if (rc == 0) {
kiwi_params_t route_params;
kiwi_params_init(&route_params);
od_frontend_status_t status;
status = od_frontend_attach(client, "setup", &route_params);
if (status != OD_OK) {
kiwi_params_free(&route_params);
return status;
}
// close backend connection
od_router_close(router, client);
/* There is possible race here, so we will discard our
* attempt if params are already set */
rc = kiwi_params_lock_set_once(&route->params, &route_params);
if (!rc)
kiwi_params_free(&route_params);
}
od_debug(&instance->logger, "setup", client, NULL, "sending params:");
/* send parameters set by client or cached by the route */
kiwi_param_t *param = route->params.params.list;
machine_msg_t *stream = machine_msg_create(0);
if (stream == NULL)
return OD_EOOM;
while (param) {
kiwi_var_type_t type;
type = kiwi_vars_find(&client->vars, kiwi_param_name(param),
param->name_len);
kiwi_var_t *var;
var = kiwi_vars_get(&client->vars, type);
machine_msg_t *msg;
if (var) {
msg = kiwi_be_write_parameter_status(stream, var->name,
var->name_len,
var->value,
var->value_len);
od_debug(&instance->logger, "setup", client, NULL,
" %.*s = %.*s", var->name_len, var->name,
var->value_len, var->value);
} else {
msg = kiwi_be_write_parameter_status(
stream, kiwi_param_name(param), param->name_len,
kiwi_param_value(param), param->value_len);
od_debug(&instance->logger, "setup", client, NULL,
" %.*s = %.*s", param->name_len,
kiwi_param_name(param), param->value_len,
kiwi_param_value(param));
}
if (msg == NULL) {
machine_msg_free(stream);
return OD_EOOM;
}
param = param->next;
}
rc = od_write(&client->io, stream);
if (rc == -1)
return OD_ECLIENT_WRITE;
return OD_OK;
}
static inline od_frontend_status_t od_frontend_setup(od_client_t *client)
{
od_instance_t *instance = client->global->instance;
od_route_t *route = client->route;
/* set paremeters */
od_frontend_status_t status;
status = od_frontend_setup_params(client);
if (status != OD_OK)
return status;
if (route->rule->pool->reserve_prepared_statement) {
if (od_client_init_hm(client) != OK_RESPONSE) {
od_log(&instance->logger, "setup", client, NULL,
"failed to initialize hash map for prepared statements");
return OD_EOOM;
}
}
/* write key data message */
machine_msg_t *stream;
machine_msg_t *msg;
msg = kiwi_be_write_backend_key_data(NULL, client->key.key_pid,
client->key.key);
if (msg == NULL)
return OD_EOOM;
stream = msg;
/* write ready message */
msg = kiwi_be_write_ready(stream, 'I');
if (msg == NULL) {
machine_msg_free(stream);
return OD_EOOM;
}
int rc;
rc = od_write(&client->io, stream);
if (rc == -1)
return OD_ECLIENT_WRITE;
if (instance->config.log_session) {
client->time_setup = machine_time_us();
od_log(&instance->logger, "setup", client, NULL,
"login time: %d microseconds",
(client->time_setup - client->time_accept));
od_log(&instance->logger, "setup", client, NULL,
"client connection from %s to route %s.%s accepted",
client->peer, route->rule->db_name,
route->rule->user_name);
}
return OD_OK;
}
static inline od_frontend_status_t od_frontend_local_setup(od_client_t *client)
{
machine_msg_t *stream;
stream = machine_msg_create(0);
if (stream == NULL)
goto error;
/* client parameters */
machine_msg_t *msg;
char data[128];
int data_len;
/* current version and build */
data_len =
od_snprintf(data, sizeof(data), "%s-%s-%s", OD_VERSION_NUMBER,
OD_VERSION_GIT, OD_VERSION_BUILD);
msg = kiwi_be_write_parameter_status(stream, "server_version", 15, data,
data_len + 1);
if (msg == NULL)
goto error;
msg = kiwi_be_write_parameter_status(stream, "server_encoding", 16,
"UTF-8", 6);
if (msg == NULL)
goto error;
msg = kiwi_be_write_parameter_status(stream, "client_encoding", 16,
"UTF-8", 6);
if (msg == NULL)
goto error;
msg = kiwi_be_write_parameter_status(stream, "DateStyle", 10, "ISO", 4);
if (msg == NULL)
goto error;
msg = kiwi_be_write_parameter_status(stream, "TimeZone", 9, "GMT", 4);
if (msg == NULL)
goto error;
/* ready message */
msg = kiwi_be_write_ready(stream, 'I');
if (msg == NULL)
goto error;
int rc;
rc = od_write(&client->io, stream);
if (rc == -1)
return OD_ECLIENT_WRITE;
return OD_OK;
error:
if (stream)
machine_msg_free(stream);
return OD_EOOM;
}
static inline bool od_eject_conn_with_rate(od_client_t *client,
od_server_t *server,
od_instance_t *instance)
{
if (server == NULL) {
/* server is null - client was never attached to any server so its ok to eject this conn */
return true;
}
od_thread_global **gl = od_thread_global_get();
if (gl == NULL) {
od_log(&instance->logger, "shutdown", client, server,
"drop client connection on restart, unable to throttle (wid %d)",
(*gl)->wid);
/* this is clearly something bad, TODO: handle properly */
return true;
}
od_conn_eject_info *info = (*gl)->info;
struct timeval tv;
gettimeofday(&tv, NULL);
bool res = false;
pthread_mutex_lock(&info->mu);
{
if (info->last_conn_drop_ts + /* 1 sec */ 1 > tv.tv_sec) {
od_log(&instance->logger, "shutdown", client, server,
"delay drop client connection on restart, last drop was too recent (wid %d, last drop %d, curr time %d)",
(*gl)->wid, info->last_conn_drop_ts, tv.tv_sec);
} else {
info->last_conn_drop_ts = tv.tv_sec;
res = true;
od_log(&instance->logger, "shutdown", client, server,
"drop client connection on restart (wid %d, last eject %d, curr time %d)",
(*gl)->wid, info->last_conn_drop_ts, tv.tv_sec);
}
}
pthread_mutex_unlock(&info->mu);
return res;
}
static inline bool od_eject_conn_with_timeout(od_client_t *client,
__attribute__((unused))
od_server_t *server,
uint64_t timeout)
{
assert(server != NULL);
od_dbg_printf_on_dvl_lvl(1, "current time %lld, drop horizon %lld\n",
machine_time_us(),
client->time_last_active + timeout);
if (client->time_last_active + timeout < machine_time_us()) {
return true;
}
return false;
}
static inline bool od_should_drop_connection(od_client_t *client,
od_server_t *server)
{
od_instance_t *instance = client->global->instance;
switch (client->rule->pool->pool) {
case OD_RULE_POOL_SESSION: {
if (od_unlikely(client->rule->pool->client_idle_timeout)) {
// as we do not unroute client in session pooling after transaction block etc
// we should consider this case separately
// general logic is: if client do nothing long enough we can assume this is just a stale connection
// but we need to ensure this connection was initialized etc
if (od_unlikely(
server != NULL && !server->is_transaction &&
/* case when we are out of any transactional block ut perform some stmt */
od_server_synchronized(server))) {
if (od_eject_conn_with_timeout(
client, server,
client->rule->pool
->client_idle_timeout)) {
od_log(&instance->logger, "shutdown",
client, server,
"drop idle client connection on due timeout %d sec",
client->rule->pool
->client_idle_timeout);
return true;
}
}
}
if (od_unlikely(
client->rule->pool->idle_in_transaction_timeout)) {
// the same as above but we are going to drop client inside transaction block
if (server != NULL && server->is_transaction &&
/*server is sync - that means client executed some stmts and got get result, and now just... do nothing */
od_server_synchronized(server)) {
if (od_eject_conn_with_timeout(
client, server,
client->rule->pool
->idle_in_transaction_timeout)) {
od_log(&instance->logger, "shutdown",
client, server,
"drop idle in transaction connection on due timeout %d sec",
client->rule->pool
->idle_in_transaction_timeout);
return true;
}
}
}
}
/* fall through */
case OD_RULE_POOL_STATEMENT:
case OD_RULE_POOL_TRANSACTION: {
//TODO:: drop no more than X connection per sec/min/whatever
if (od_likely(instance->shutdown_worker_id ==
INVALID_COROUTINE_ID)) {
// try to optimize likely path
return false;
}
if (od_unlikely(client->rule->storage->storage_type ==
OD_RULE_STORAGE_LOCAL)) {
/* local server is not very important (db like console, pgbouncer used for stats)*/
return true;
}
if (od_unlikely(server == NULL)) {
return od_eject_conn_with_rate(client, server,
instance);
}
if (server->state ==
OD_SERVER_ACTIVE /* we can drop client that are just connected and do not perform any queries */
&& !od_server_synchronized(server)) {
/* most probably we are not in transcation, but still executing some stmt */
return false;
}
if (od_unlikely(!server->is_transaction)) {
return od_eject_conn_with_rate(client, server,
instance);
}
return false;
} break;
default:
return false;
}
}
static od_frontend_status_t od_frontend_ctl(od_client_t *client)
{
uint32_t op = od_client_ctl_of(client);
if (op & OD_CLIENT_OP_KILL) {
od_client_ctl_unset(client, OD_CLIENT_OP_KILL);
od_client_notify_read(client);
return OD_STOP;
}
return OD_OK;
}
static od_frontend_status_t od_frontend_local(od_client_t *client)
{
od_instance_t *instance = client->global->instance;
for (;;) {
machine_msg_t *msg = NULL;
for (;;) {
/* local server is alwys null */
if (od_should_drop_connection(client, NULL)) {
/* Odyssey is in a state of completion, we done
* the last client's request and now we can drop the connection */
/* a sort of EAGAIN */
return OD_ECLIENT_READ;
}
/* one minute */
msg = od_read(&client->io, 60000);
if (machine_timedout()) {
/* retry wait to recheck exit condition */
assert(msg == NULL);
continue;
}
if (msg == NULL) {
return OD_ECLIENT_READ;
} else {
break;
}
}
/* client operations */
od_frontend_status_t status;
status = od_frontend_ctl(client);
if (status != OD_OK)
break;
kiwi_fe_type_t type;
type = *(char *)machine_msg_data(msg);
od_debug(&instance->logger, "local", client, NULL, "%s",
kiwi_fe_type_to_string(type));
if (type == KIWI_FE_TERMINATE) {
machine_msg_free(msg);
break;
}
machine_msg_t *stream = machine_msg_create(0);
if (stream == NULL) {
machine_msg_free(msg);
return OD_EOOM;
}
int rc;
if (type == KIWI_FE_QUERY) {
rc = od_console_query(client, stream,
machine_msg_data(msg),
machine_msg_size(msg));
machine_msg_free(msg);
if (rc == -1) {
machine_msg_free(stream);
return OD_EOOM;
}
} else {
/* unsupported */
machine_msg_free(msg);
od_error(&instance->logger, "local", client, NULL,
"unsupported request '%s'",
kiwi_fe_type_to_string(type));
msg = od_frontend_errorf(client, stream,
KIWI_FEATURE_NOT_SUPPORTED,
"unsupported request '%s'",
kiwi_fe_type_to_string(type));
if (msg == NULL) {
machine_msg_free(stream);
return OD_EOOM;
}
}
/* ready */
msg = kiwi_be_write_ready(stream, 'I');
if (msg == NULL) {
machine_msg_free(stream);
return OD_EOOM;
}
rc = od_write(&client->io, stream);
if (rc == -1) {
return OD_ECLIENT_WRITE;
}
}
return OD_OK;
}
static od_frontend_status_t od_frontend_remote_server(od_relay_t *relay,
char *data, int size)
{
od_client_t *client = relay->on_packet_arg;
od_server_t *server = client->server;
od_route_t *route = client->route;
od_instance_t *instance = client->global->instance;
od_frontend_status_t retstatus;
retstatus = OD_OK;
kiwi_be_type_t type = *data;
if (instance->config.log_debug)
od_debug(&instance->logger, "main", client, server, "%s",
kiwi_be_type_to_string(type));
int is_deploy = od_server_in_deploy(server);
int is_ready_for_query = 0;
int rc;
switch (type) {
case KIWI_BE_ERROR_RESPONSE:
od_backend_error(server, "main", data, size);
break;
case KIWI_BE_PARAMETER_STATUS:
rc = od_backend_update_parameter(server, "main", data, size, 0);
if (rc == -1)
return relay->error_read;
break;
case KIWI_BE_COPY_IN_RESPONSE:
case KIWI_BE_COPY_OUT_RESPONSE:
server->in_out_response_received++;
break;
case KIWI_BE_COPY_DONE:
/* should go after copy out
* states that backend copy ended
*/
server->done_fail_response_received++;
break;
case KIWI_BE_COPY_FAIL:
/*
* states that backend copy failed
*/
return relay->error_write;
case KIWI_BE_READY_FOR_QUERY: {
is_ready_for_query = 1;
od_backend_ready(server, data, size);
/* exactly one RFQ! */
if (od_server_in_sync_point(server)) {
retstatus = OD_SKIP;
}
if (is_deploy)
server->deploy_sync--;
if (!server->synced_settings) {
server->synced_settings = true;
break;
}
/* update server stats */
int64_t query_time = 0;
od_stat_query_end(&route->stats, &server->stats_state,
server->is_transaction, &query_time);
if (instance->config.log_debug && query_time > 0) {
od_debug(&instance->logger, "main", server->client,
server, "query time: %" PRIi64 " microseconds",
query_time);
}
break;
}
case KIWI_BE_PARSE_COMPLETE:
if (route->rule->pool->reserve_prepared_statement) {
// skip msg
retstatus = OD_SKIP;
}
default:
break;
}
/* discard replies during configuration deploy */
if (is_deploy || retstatus == OD_SKIP)
return OD_SKIP;
if (route->id.physical_rep || route->id.logical_rep) {
// do not detach server connection on replication
// the exceptional case in offine: we are going to shut down here
if (server->offline) {
return OD_DETACH;
}
} else {
if (is_ready_for_query && od_server_synchronized(server) &&
server->parse_msg == NULL) {
switch (route->rule->pool->pool) {
case OD_RULE_POOL_STATEMENT:
return OD_DETACH;
case OD_RULE_POOL_TRANSACTION:
if (!server->is_transaction) {
return OD_DETACH;
}
break;
case OD_RULE_POOL_SESSION:
if (server->offline &&
!server->is_transaction) {
return OD_DETACH;
}
break;
}
}
}
return retstatus;
}
static inline od_retcode_t od_frontend_log_query(od_instance_t *instance,
od_client_t *client,
char *data, int size)
{
uint32_t query_len;
char *query;
int rc;
rc = kiwi_be_read_query(data, size, &query, &query_len);
if (rc == -1)
return NOT_OK_RESPONSE;
od_log(&instance->logger, "query", client, NULL, "%.*s", query_len,
query);
return OK_RESPONSE;
}
static inline od_retcode_t od_frontend_log_describe(od_instance_t *instance,
od_client_t *client,
char *data, int size)
{
uint32_t name_len;
char *name;
int rc;
kiwi_fe_describe_type_t t;
rc = kiwi_be_read_describe(data, size, &name, &name_len, &t);
if (rc == -1)
return NOT_OK_RESPONSE;
od_log(&instance->logger, "describe", client, client->server,
"(%s) name: %.*s",
t == KIWI_FE_DESCRIBE_PORTAL ? "portal" : "statement", name_len,
name);
return OK_RESPONSE;
}
static inline od_retcode_t od_frontend_log_execute(od_instance_t *instance,
od_client_t *client,
char *data, int size)
{
uint32_t name_len;
char *name;
int rc;
rc = kiwi_be_read_execute(data, size, &name, &name_len);
if (rc == -1)
return NOT_OK_RESPONSE;
od_log(&instance->logger, "execute", client, client->server,
"name: %.*s", name_len, name);
return OK_RESPONSE;
}
static inline od_retcode_t od_frontend_parse_close(char *data, int size,
char **name,
uint32_t *name_len,
kiwi_fe_close_type_t *type)
{
int rc;
rc = kiwi_be_read_close(data, size, name, name_len, type);
if (rc == -1)
return NOT_OK_RESPONSE;
return OK_RESPONSE;
}
static inline od_retcode_t od_frontend_log_close(od_instance_t *instance,
od_client_t *client,
char *name, uint32_t name_len,
kiwi_fe_close_type_t type)
{
switch (type) {
case KIWI_FE_CLOSE_PORTAL:
od_log(&instance->logger, "close", client, client->server,
"portal, name: %.*s", name_len, name);
return OK_RESPONSE;
case KIWI_FE_CLOSE_PREPARED_STATEMENT:
od_log(&instance->logger, "close", client, client->server,
"prepared statement, name: %.*s", name_len, name);
return OK_RESPONSE;
default:
od_log(&instance->logger, "close", client, client->server,
"unknown close type, name: %.*s", name_len, name);
return NOT_OK_RESPONSE;
}
}
static inline od_retcode_t od_frontend_log_parse(od_instance_t *instance,
od_client_t *client,
char *context, char *data,
int size)
{
uint32_t query_len;
char *query;
uint32_t name_len;
char *name;
int rc;
rc = kiwi_be_read_parse(data, size, &name, &name_len, &query,
&query_len);
if (rc == -1)
return NOT_OK_RESPONSE;
od_log(&instance->logger, context, client, client->server, "%.*s %.*s",
name_len, name, query_len, query);
return OK_RESPONSE;
}
static inline od_retcode_t od_frontend_log_bind(od_instance_t *instance,
od_client_t *client, char *ctx,
char *data, int size)
{
uint32_t name_len;
char *name;
int rc;
rc = kiwi_be_read_bind_stmt_name(data, size, &name, &name_len);
if (rc == -1)
return NOT_OK_RESPONSE;
od_log(&instance->logger, ctx, client, client->server, "bind %.*s",
name_len, name);
return OK_RESPONSE;
}
// 8 hex
#define OD_HASH_LEN 9
static inline machine_msg_t *
od_frontend_rewrite_msg(char *data, int size, int opname_start_offset,
int operator_name_len, char *opname, int opnamelen)
{
machine_msg_t *msg =
machine_msg_create(size - operator_name_len + opnamelen);
char *rewrite_data = machine_msg_data(msg);
// packet header
memcpy(rewrite_data, data, opname_start_offset);
// prefix for opname
od_snprintf(rewrite_data + opname_start_offset, opnamelen, opname);
// rest of msg
memcpy(rewrite_data + opname_start_offset + opnamelen,
data + opname_start_offset + operator_name_len,
size - opname_start_offset - operator_name_len);
// set proper size to package
kiwi_header_set_size((kiwi_header_t *)rewrite_data,
size - operator_name_len + opnamelen);
return msg;
}
static od_frontend_status_t od_frontend_deploy_prepared_stmt(
od_server_t *server, od_relay_t *relay, char *ctx, char *data,
int size /* to adcance or to write? */, od_hash_t body_hash,
char *opname, int opnamelen)