xiuos/Ubiquitous/XiZi_AIoT/softkernel/syscall/sys_close_session.c

84 lines
2.9 KiB
C

/*
* Copyright (c) 2020 AIIT XUOS Lab
* XiUOS is licensed under Mulan PSL v2.
* You can use this software according to the terms and conditions of the Mulan PSL v2.
* You may obtain a copy of Mulan PSL v2 at:
* http://license.coscl.org.cn/MulanPSL2
* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
* See the Mulan PSL v2 for more details.
*/
/**
* @file sys_close_session.c
* @brief close session syscall
* @version 3.0
* @author AIIT XUOS Lab
* @date 2023.08.25
*/
/*************************************************
File name: sys_close_session.c
Description: close session syscall
Others:
History:
1. Date: 2023-08-28
Author: AIIT XUOS Lab
Modification:
1. first version
*************************************************/
#include "assert.h"
#include "multicores.h"
#include "share_page.h"
#include "syscall.h"
#include "task.h"
int sys_close_session(struct Session* session)
{
struct TaskMicroDescriptor* cur_task = cur_cpu()->task;
assert(cur_task != NULL);
/* check if session is available */
if (session->buf == NULL || (uintptr_t)session->buf < USER_IPC_SPACE_BASE || (uintptr_t)session->buf > USER_IPC_SPACE_TOP) {
return -1;
}
/* check if session is a client one or a server one */
struct session_backend* session_backend = NULL;
bool session_valid = false;
struct client_session* client_session = NULL;
DOUBLE_LIST_FOR_EACH_ENTRY(client_session, &cur_task->cli_sess_listhead, node)
{
if ((uintptr_t)session->buf == client_session->buf_addr) {
session_valid = true;
session_backend = CLIENT_SESSION_BACKEND(client_session);
if (!client_session->closed) {
client_session->closed = true;
xizi_share_page_manager.unmap_task_share_pages(cur_task, session_backend->client_side.buf_addr, session_backend->nr_pages);
}
break;
}
}
if (UNLIKELY(session_backend == NULL)) {
struct server_session* server_session = NULL;
DOUBLE_LIST_FOR_EACH_ENTRY(server_session, &cur_task->svr_sess_listhead, node)
{
if ((uintptr_t)session->buf == server_session->buf_addr) {
session_valid = true;
session_backend = SERVER_SESSION_BACKEND(server_session);
if (!server_session->closed) {
server_session->closed = true;
xizi_share_page_manager.unmap_task_share_pages(cur_task, session_backend->server_side.buf_addr, session_backend->nr_pages);
}
break;
}
}
}
/* close this session */
if (UNLIKELY(session_backend->client_side.closed && session_backend->server_side.closed) && LIKELY(session_valid)) {
xizi_share_page_manager.delete_share_pages(session_backend);
}
return 0;
}