extern int slurm_persist_conn_process_msg(slurm_persist_conn_t *persist_conn,
persist_msg_t *persist_msg,
char *msg_char, uint32_t msg_size,
Buf *out_buffer, bool first)
{
int rc;
Buf recv_buffer = NULL;
char *comment = NULL;
/* puts msg_char into buffer struct */
recv_buffer = create_buf(msg_char, msg_size);
memset(persist_msg, 0, sizeof(persist_msg_t));
rc = slurm_persist_msg_unpack(persist_conn, persist_msg, recv_buffer);
xfer_buf_data(recv_buffer); /* delete in_buffer struct
* without xfree of msg_char
* (done later in this
* function). */
if (rc != SLURM_SUCCESS) {
comment = xstrdup_printf("Failed to unpack %s message",
slurmdbd_msg_type_2_str(
persist_msg->msg_type, true));
error("CONN:%u %s", persist_conn->fd, comment);
*out_buffer = slurm_persist_make_rc_msg(
persist_conn, rc, comment, persist_msg->msg_type);
xfree(comment);
}
/* 2 versions after 17.02 code refering to DBD_INIT can be removed as it
will no longer be suppported.
*/
else if (first &&
(persist_msg->msg_type != REQUEST_PERSIST_INIT) &&
(persist_msg->msg_type != DBD_INIT)) {
comment = "Initial RPC not REQUEST_PERSIST_INIT";
error("CONN:%u %s type (%d)",
persist_conn->fd, comment, persist_msg->msg_type);
rc = EINVAL;
*out_buffer = slurm_persist_make_rc_msg(
persist_conn, rc, comment,
REQUEST_PERSIST_INIT);
} else if (!first &&
((persist_msg->msg_type == REQUEST_PERSIST_INIT) ||
(persist_msg->msg_type == DBD_INIT))) {
comment = "REQUEST_PERSIST_INIT sent after connection established";
error("CONN:%u %s", persist_conn->fd, comment);
rc = EINVAL;
*out_buffer = slurm_persist_make_rc_msg(
persist_conn, rc, comment, REQUEST_PERSIST_INIT);
}
return rc;
}
/* Open a persistent socket connection
* IN/OUT - persistent connection needing rem_host and rem_port filled in.
* Returned completely filled in.
* Returns SLURM_SUCCESS on success or SLURM_ERROR on failure */
extern int slurm_persist_conn_open(slurm_persist_conn_t *persist_conn)
{
int rc = SLURM_ERROR;
slurm_msg_t req_msg;
persist_init_req_msg_t req;
persist_rc_msg_t *resp = NULL;
if (slurm_persist_conn_open_without_init(persist_conn) != SLURM_SUCCESS)
return rc;
slurm_msg_t_init(&req_msg);
/* Always send the lowest protocol since we don't know what version the
* other side is running yet.
*/
req_msg.protocol_version = persist_conn->version;
req_msg.msg_type = REQUEST_PERSIST_INIT;
req_msg.flags |= SLURM_GLOBAL_AUTH_KEY;
if (persist_conn->flags & PERSIST_FLAG_DBD)
req_msg.flags |= SLURMDBD_CONNECTION;
memset(&req, 0, sizeof(persist_init_req_msg_t));
req.cluster_name = persist_conn->cluster_name;
req.persist_type = persist_conn->persist_type;
req.port = persist_conn->my_port;
req.version = SLURM_PROTOCOL_VERSION;
req_msg.data = &req;
if (slurm_send_node_msg(persist_conn->fd, &req_msg) < 0) {
error("%s: failed to send persistent connection init message to %s:%d",
__func__, persist_conn->rem_host, persist_conn->rem_port);
_close_fd(&persist_conn->fd);
} else {
Buf buffer = slurm_persist_recv_msg(persist_conn);
persist_msg_t msg;
slurm_persist_conn_t persist_conn_tmp;
if (!buffer) {
if (_comm_fail_log(persist_conn)) {
error("%s: No response to persist_init",
__func__);
}
_close_fd(&persist_conn->fd);
goto end_it;
}
memset(&msg, 0, sizeof(persist_msg_t));
memcpy(&persist_conn_tmp, persist_conn,
sizeof(slurm_persist_conn_t));
/* The first unpack is done the same way for dbd or normal
* communication . */
persist_conn_tmp.flags &= (~PERSIST_FLAG_DBD);
rc = slurm_persist_msg_unpack(&persist_conn_tmp, &msg, buffer);
free_buf(buffer);
resp = (persist_rc_msg_t *)msg.data;
if (resp && (rc == SLURM_SUCCESS)) {
rc = resp->rc;
persist_conn->version = resp->ret_info;
persist_conn->flags |= resp->flags;
}
if (rc != SLURM_SUCCESS) {
if (resp) {
error("%s: Something happened with the receiving/processing of the persistent connection init message to %s:%d: %s",
__func__, persist_conn->rem_host,
persist_conn->rem_port, resp->comment);
} else {
error("%s: Failed to unpack persistent connection init resp message from %s:%d",
__func__,
persist_conn->rem_host,
persist_conn->rem_port);
}
_close_fd(&persist_conn->fd);
}
}
end_it:
slurm_persist_free_rc_msg(resp);
return rc;
}
