static int
on_mp_write_session_write_response_write1(struct query_state *qstate)
{
struct cache_mp_write_session_write_response *write_response;
ssize_t result;
TRACE_IN(on_mp_write_session_write_response_write1);
write_response = get_cache_mp_write_session_write_response(
&qstate->response);
result = qstate->write_func(qstate, &write_response->error_code,
sizeof(int));
if (result != sizeof(int)) {
LOG_ERR_3("on_mp_write_session_write_response_write1",
"write failed");
TRACE_OUT(on_mp_write_session_write_response_write1);
return (-1);
}
if (write_response->error_code == 0) {
finalize_comm_element(&qstate->request);
finalize_comm_element(&qstate->response);
qstate->kevent_watermark = sizeof(int);
qstate->process_func = on_mp_write_session_mapper;
qstate->kevent_filter = EVFILT_READ;
} else {
qstate->kevent_watermark = 0;
qstate->process_func = 0;
}
TRACE_OUT(on_mp_write_session_write_response_write1);
return (0);
}
static int
on_mp_write_session_write_request_read2(struct query_state *qstate)
{
struct cache_mp_write_session_write_request *write_request;
ssize_t result;
TRACE_IN(on_mp_write_session_write_request_read2);
write_request = get_cache_mp_write_session_write_request(
&qstate->request);
result = qstate->read_func(qstate, write_request->data,
write_request->data_size);
if (result < 0 || (size_t)result != qstate->kevent_watermark) {
LOG_ERR_3("on_mp_write_session_write_request_read2",
"read failed");
TRACE_OUT(on_mp_write_session_write_request_read2);
return (-1);
}
qstate->kevent_watermark = 0;
qstate->process_func = on_mp_write_session_write_request_process;
TRACE_OUT(on_mp_write_session_write_request_read2);
return (0);
}
static int
on_mp_read_session_read_response_write2(struct query_state *qstate)
{
struct cache_mp_read_session_read_response *read_response;
ssize_t result;
TRACE_IN(on_mp_read_session_read_response_write2);
read_response = get_cache_mp_read_session_read_response(
&qstate->response);
result = qstate->write_func(qstate, read_response->data,
read_response->data_size);
if (result < 0 || (size_t)result != qstate->kevent_watermark) {
LOG_ERR_3("on_mp_read_session_read_response_write2",
"write failed");
TRACE_OUT(on_mp_read_session_read_response_write2);
return (-1);
}
finalize_comm_element(&qstate->request);
finalize_comm_element(&qstate->response);
qstate->kevent_watermark = sizeof(int);
qstate->process_func = on_mp_read_session_mapper;
qstate->kevent_filter = EVFILT_READ;
TRACE_OUT(on_mp_read_session_read_response_write2);
return (0);
}
/*
* The functions below are used to process multipart write session initiation
* requests.
* - on_mp_write_session_request_read1 and on_mp_write_session_request_read2
* read the request itself
* - on_mp_write_session_request_process processes it
* - on_mp_write_session_response_write1 sends the response
*/
int
on_mp_write_session_request_read1(struct query_state *qstate)
{
struct cache_mp_write_session_request *c_mp_ws_request;
ssize_t result;
TRACE_IN(on_mp_write_session_request_read1);
if (qstate->kevent_watermark == 0)
qstate->kevent_watermark = sizeof(size_t);
else {
init_comm_element(&qstate->request,
CET_MP_WRITE_SESSION_REQUEST);
c_mp_ws_request = get_cache_mp_write_session_request(
&qstate->request);
result = qstate->read_func(qstate,
&c_mp_ws_request->entry_length, sizeof(size_t));
if (result != sizeof(size_t)) {
LOG_ERR_3("on_mp_write_session_request_read1",
"read failed");
TRACE_OUT(on_mp_write_session_request_read1);
return (-1);
}
if (BUFSIZE_INVALID(c_mp_ws_request->entry_length)) {
LOG_ERR_3("on_mp_write_session_request_read1",
"invalid entry_length value");
TRACE_OUT(on_mp_write_session_request_read1);
return (-1);
}
c_mp_ws_request->entry = calloc(1,
c_mp_ws_request->entry_length + 1);
assert(c_mp_ws_request->entry != NULL);
qstate->kevent_watermark = c_mp_ws_request->entry_length;
qstate->process_func = on_mp_write_session_request_read2;
}
TRACE_OUT(on_mp_write_session_request_read1);
return (0);
}
/*
* Mapper function is used to avoid multiple connections for each session
* write or read requests. After processing the request, it does not close
* the connection, but waits for the next request.
*/
static int
on_mp_read_session_mapper(struct query_state *qstate)
{
ssize_t result;
int elem_type;
TRACE_IN(on_mp_read_session_mapper);
if (qstate->kevent_watermark == 0) {
qstate->kevent_watermark = sizeof(int);
} else {
result = qstate->read_func(qstate, &elem_type, sizeof(int));
if (result != sizeof(int)) {
LOG_ERR_3("on_mp_read_session_mapper",
"read failed");
TRACE_OUT(on_mp_read_session_mapper);
return (-1);
}
switch (elem_type) {
case CET_MP_READ_SESSION_READ_REQUEST:
qstate->kevent_watermark = 0;
qstate->process_func =
on_mp_read_session_read_request_process;
break;
case CET_MP_READ_SESSION_CLOSE_NOTIFICATION:
qstate->kevent_watermark = 0;
qstate->process_func =
on_mp_read_session_close_notification;
break;
default:
qstate->kevent_watermark = 0;
qstate->process_func = NULL;
LOG_ERR_3("on_mp_read_session_mapper",
"unknown element type");
TRACE_OUT(on_mp_read_session_mapper);
return (-1);
}
}
TRACE_OUT(on_mp_read_session_mapper);
return (0);
}
static int
on_mp_read_session_read_response_write1(struct query_state *qstate)
{
struct cache_mp_read_session_read_response *read_response;
ssize_t result;
TRACE_IN(on_mp_read_session_read_response_write1);
read_response = get_cache_mp_read_session_read_response(
&qstate->response);
result = qstate->write_func(qstate, &read_response->error_code,
sizeof(int));
if (read_response->error_code == 0) {
result += qstate->write_func(qstate, &read_response->data_size,
sizeof(size_t));
if (result < 0 || (size_t)result != qstate->kevent_watermark) {
TRACE_OUT(on_mp_read_session_read_response_write1);
LOG_ERR_3("on_mp_read_session_read_response_write1",
"write failed");
return (-1);
}
qstate->kevent_watermark = read_response->data_size;
qstate->process_func = on_mp_read_session_read_response_write2;
} else {
if (result < 0 || (size_t)result != qstate->kevent_watermark) {
LOG_ERR_3("on_mp_read_session_read_response_write1",
"write failed");
TRACE_OUT(on_mp_read_session_read_response_write1);
return (-1);
}
qstate->kevent_watermark = 0;
qstate->process_func = NULL;
}
TRACE_OUT(on_mp_read_session_read_response_write1);
return (0);
}
/*
* The functions below are used to process multipart write sessions write
* requests.
* - on_mp_write_session_write_request_read1 and
* on_mp_write_session_write_request_read2 read the request itself
* - on_mp_write_session_write_request_process processes it
* - on_mp_write_session_write_response_write1 sends the response
*/
static int
on_mp_write_session_write_request_read1(struct query_state *qstate)
{
struct cache_mp_write_session_write_request *write_request;
ssize_t result;
TRACE_IN(on_mp_write_session_write_request_read1);
init_comm_element(&qstate->request,
CET_MP_WRITE_SESSION_WRITE_REQUEST);
write_request = get_cache_mp_write_session_write_request(
&qstate->request);
result = qstate->read_func(qstate, &write_request->data_size,
sizeof(size_t));
if (result != sizeof(size_t)) {
LOG_ERR_3("on_mp_write_session_write_request_read1",
"read failed");
TRACE_OUT(on_mp_write_session_write_request_read1);
return (-1);
}
if (BUFSIZE_INVALID(write_request->data_size)) {
LOG_ERR_3("on_mp_write_session_write_request_read1",
"invalid data_size value");
TRACE_OUT(on_mp_write_session_write_request_read1);
return (-1);
}
write_request->data = calloc(1, write_request->data_size);
assert(write_request->data != NULL);
qstate->kevent_watermark = write_request->data_size;
qstate->process_func = on_mp_write_session_write_request_read2;
TRACE_OUT(on_mp_write_session_write_request_read1);
return (0);
}
