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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2018 Samsung Electronics Co., Ltd.
*
* linux-cifsd-devel@lists.sourceforge.net
*/
#include <memory.h>
#include <glib.h>
#include <errno.h>
#include <linux/ksmbd_server.h>
#include <tools.h>
#include <worker.h>
#include <ipc.h>
#include <rpc.h>
#include <management/user.h>
#include <management/share.h>
#include <management/tree_conn.h>
#include <management/spnego.h>
#define MAX_WORKER_THREADS 4
static GThreadPool *pool;
#define VALID_IPC_MSG(m, t) \
({ \
int ret = 1; \
if (((m)->sz != sizeof(t))) { \
pr_err("Bad message: %s\n", __func__); \
ret = 0; \
} \
ret; \
})
static int login_request(struct ksmbd_ipc_msg *msg)
{
struct ksmbd_login_request *req;
struct ksmbd_login_response *resp;
struct ksmbd_ipc_msg *resp_msg;
resp_msg = ipc_msg_alloc(sizeof(*resp));
if (!resp_msg)
goto out;
req = KSMBD_IPC_MSG_PAYLOAD(msg);
resp = KSMBD_IPC_MSG_PAYLOAD(resp_msg);
resp->status = KSMBD_USER_FLAG_INVALID;
if (VALID_IPC_MSG(msg, struct ksmbd_login_request))
usm_handle_login_request(req, resp);
resp_msg->type = KSMBD_EVENT_LOGIN_RESPONSE;
resp->handle = req->handle;
ipc_msg_send(resp_msg);
out:
ipc_msg_free(resp_msg);
return 0;
}
static int login_response_payload_sz(char *account)
{
int payload_sz;
struct ksmbd_user *user;
if (account[0] == '\0')
return 0;
user = usm_lookup_user(account);
if (!user)
return 0;
payload_sz = sizeof(gid_t) * user->ngroups;
put_ksmbd_user(user);
return payload_sz;
}
static int login_request_ext(struct ksmbd_ipc_msg *msg)
{
struct ksmbd_login_request *req;
struct ksmbd_login_response_ext *resp;
struct ksmbd_ipc_msg *resp_msg;
int payload_sz;
req = KSMBD_IPC_MSG_PAYLOAD(msg);
payload_sz = login_response_payload_sz(req->account);
resp_msg = ipc_msg_alloc(sizeof(*resp) + payload_sz);
if (!resp_msg)
goto out;
resp = KSMBD_IPC_MSG_PAYLOAD(resp_msg);
if (VALID_IPC_MSG(msg, struct ksmbd_login_request))
usm_handle_login_request_ext(req, resp);
resp_msg->type = KSMBD_EVENT_LOGIN_RESPONSE_EXT;
resp->handle = req->handle;
ipc_msg_send(resp_msg);
out:
ipc_msg_free(resp_msg);
return 0;
}
static int spnego_authen_request(struct ksmbd_ipc_msg *msg)
{
struct ksmbd_spnego_authen_request *req;
struct ksmbd_spnego_authen_response *resp;
struct ksmbd_ipc_msg *resp_msg = NULL;
struct ksmbd_spnego_auth_out auth_out;
struct ksmbd_login_request login_req;
int retval = 0;
req = KSMBD_IPC_MSG_PAYLOAD(msg);
resp_msg = ipc_msg_alloc(sizeof(*resp));
if (!resp_msg)
return -ENOMEM;
resp_msg->type = KSMBD_EVENT_SPNEGO_AUTHEN_RESPONSE;
resp = KSMBD_IPC_MSG_PAYLOAD(resp_msg);
resp->handle = req->handle;
resp->login_response.status = KSMBD_USER_FLAG_INVALID;
if (msg->sz <= sizeof(struct ksmbd_spnego_authen_request)) {
retval = -EINVAL;
goto out;
}
/* Authentication */
if (spnego_handle_authen_request(req, &auth_out) != 0) {
retval = -EPERM;
goto out;
}
ipc_msg_free(resp_msg);
resp_msg = ipc_msg_alloc(sizeof(*resp) +
auth_out.key_len + auth_out.blob_len);
if (!resp_msg) {
retval = -ENOMEM;
goto out_free_auth;
}
resp_msg->type = KSMBD_EVENT_SPNEGO_AUTHEN_RESPONSE;
resp = KSMBD_IPC_MSG_PAYLOAD(resp_msg);
resp->handle = req->handle;
resp->login_response.status = KSMBD_USER_FLAG_INVALID;
/* login */
login_req.handle = req->handle;
strncpy(login_req.account, auth_out.user_name,
sizeof(login_req.account));
usm_handle_login_request(&login_req, &resp->login_response);
if (!(resp->login_response.status & KSMBD_USER_FLAG_OK)) {
pr_info("Unable to login user `%s'\n", login_req.account);
goto out_free_auth;
}
resp->session_key_len = auth_out.key_len;
memcpy(resp->payload, auth_out.sess_key, auth_out.key_len);
resp->spnego_blob_len = auth_out.blob_len;
memcpy(resp->payload + auth_out.key_len, auth_out.spnego_blob,
auth_out.blob_len);
out_free_auth:
g_free(auth_out.spnego_blob);
g_free(auth_out.sess_key);
g_free(auth_out.user_name);
out:
if (resp_msg) {
ipc_msg_send(resp_msg);
ipc_msg_free(resp_msg);
}
return retval;
}
static int tree_connect_request(struct ksmbd_ipc_msg *msg)
{
struct ksmbd_tree_connect_request *req;
struct ksmbd_tree_connect_response *resp;
struct ksmbd_ipc_msg *resp_msg;
resp_msg = ipc_msg_alloc(sizeof(*resp));
if (!resp_msg)
goto out;
req = KSMBD_IPC_MSG_PAYLOAD(msg);
resp = KSMBD_IPC_MSG_PAYLOAD(resp_msg);
resp->status = KSMBD_TREE_CONN_STATUS_ERROR;
resp->connection_flags = 0;
if (VALID_IPC_MSG(msg, struct ksmbd_tree_connect_request))
tcm_handle_tree_connect(req, resp);
resp_msg->type = KSMBD_EVENT_TREE_CONNECT_RESPONSE;
resp->handle = req->handle;
ipc_msg_send(resp_msg);
out:
ipc_msg_free(resp_msg);
return 0;
}
static int share_config_request(struct ksmbd_ipc_msg *msg)
{
struct ksmbd_share_config_request *req;
struct ksmbd_share_config_response *resp;
struct ksmbd_share *share = NULL;
struct ksmbd_ipc_msg *resp_msg;
int payload_sz = 0;
req = KSMBD_IPC_MSG_PAYLOAD(msg);
if (VALID_IPC_MSG(msg, struct ksmbd_share_config_request)) {
share = shm_lookup_share(req->share_name);
if (share)
payload_sz = shm_share_config_payload_size(share);
}
resp_msg = ipc_msg_alloc(sizeof(*resp) + payload_sz);
if (!resp_msg)
goto out;
resp = KSMBD_IPC_MSG_PAYLOAD(resp_msg);
resp->payload_sz = payload_sz;
shm_handle_share_config_request(share, resp);
resp_msg->type = KSMBD_EVENT_SHARE_CONFIG_RESPONSE;
resp->handle = req->handle;
ipc_msg_send(resp_msg);
out:
put_ksmbd_share(share);
ipc_msg_free(resp_msg);
return 0;
}
static int tree_disconnect_request(struct ksmbd_ipc_msg *msg)
{
struct ksmbd_tree_disconnect_request *req;
if (!VALID_IPC_MSG(msg, struct ksmbd_tree_disconnect_request))
return -EINVAL;
req = KSMBD_IPC_MSG_PAYLOAD(msg);
tcm_handle_tree_disconnect(req->session_id, req->connect_id);
return 0;
}
static int logout_request(struct ksmbd_ipc_msg *msg)
{
if (!VALID_IPC_MSG(msg, struct ksmbd_logout_request))
return -EINVAL;
return usm_handle_logout_request(KSMBD_IPC_MSG_PAYLOAD(msg));
}
static int heartbeat_request(struct ksmbd_ipc_msg *msg)
{
if (!VALID_IPC_MSG(msg, struct ksmbd_heartbeat))
return -EINVAL;
pr_debug("HEARTBEAT frame from the server\n");
return 0;
}
static int rpc_request(struct ksmbd_ipc_msg *msg)
{
struct ksmbd_rpc_command *req;
struct ksmbd_rpc_command *resp;
struct ksmbd_ipc_msg *resp_msg = NULL;
int ret = -ENOTSUP;
if (msg->sz < sizeof(struct ksmbd_rpc_command))
goto out;
req = KSMBD_IPC_MSG_PAYLOAD(msg);
if (req->flags & KSMBD_RPC_METHOD_RETURN)
resp_msg = ipc_msg_alloc(KSMBD_IPC_MAX_MESSAGE_SIZE -
sizeof(struct ksmbd_rpc_command));
else
resp_msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command));
if (!resp_msg)
goto out;
resp = KSMBD_IPC_MSG_PAYLOAD(resp_msg);
if ((req->flags & KSMBD_RPC_RAP_METHOD) == KSMBD_RPC_RAP_METHOD) {
pr_err("RAP command is not supported yet %x\n", req->flags);
ret = KSMBD_RPC_ENOTIMPLEMENTED;
} else if (req->flags & KSMBD_RPC_OPEN_METHOD) {
ret = rpc_open_request(req, resp);
} else if (req->flags & KSMBD_RPC_CLOSE_METHOD) {
ret = rpc_close_request(req, resp);
} else if (req->flags & KSMBD_RPC_IOCTL_METHOD) {
ret = rpc_ioctl_request(req, resp, resp_msg->sz);
} else if (req->flags & KSMBD_RPC_WRITE_METHOD) {
ret = rpc_write_request(req, resp);
} else if (req->flags & KSMBD_RPC_READ_METHOD) {
ret = rpc_read_request(req, resp, resp_msg->sz);
} else {
pr_err("Unknown RPC method: %x\n", req->flags);
ret = KSMBD_RPC_ENOTIMPLEMENTED;
}
resp_msg->type = KSMBD_EVENT_RPC_RESPONSE;
resp->handle = req->handle;
resp->flags = ret;
resp_msg->sz = sizeof(struct ksmbd_rpc_command) + resp->payload_sz;
ipc_msg_send(resp_msg);
out:
ipc_msg_free(resp_msg);
return 0;
}
static void worker_pool_fn(gpointer event, gpointer user_data)
{
struct ksmbd_ipc_msg *msg = (struct ksmbd_ipc_msg *)event;
switch (msg->type) {
case KSMBD_EVENT_LOGIN_REQUEST:
login_request(msg);
break;
case KSMBD_EVENT_TREE_CONNECT_REQUEST:
tree_connect_request(msg);
break;
case KSMBD_EVENT_TREE_DISCONNECT_REQUEST:
tree_disconnect_request(msg);
break;
case KSMBD_EVENT_LOGOUT_REQUEST:
logout_request(msg);
break;
case KSMBD_EVENT_SHARE_CONFIG_REQUEST:
share_config_request(msg);
break;
case KSMBD_EVENT_RPC_REQUEST:
rpc_request(msg);
break;
case KSMBD_EVENT_HEARTBEAT_REQUEST:
heartbeat_request(msg);
break;
case KSMBD_EVENT_SPNEGO_AUTHEN_REQUEST:
spnego_authen_request(msg);
break;
case KSMBD_EVENT_LOGIN_REQUEST_EXT:
login_request_ext(msg);
break;
default:
pr_err("Unknown IPC message type: %d\n", msg->type);
break;
}
ipc_msg_free(msg);
}
int wp_ipc_msg_push(struct ksmbd_ipc_msg *msg)
{
return g_thread_pool_push(pool, msg, NULL);
}
void wp_destroy(void)
{
if (pool) {
g_thread_pool_free(pool, 1, 1);
pool = NULL;
}
}
void wp_init(void)
{
if (!pool)
pool = g_thread_pool_new(
worker_pool_fn,
NULL,
MAX_WORKER_THREADS,
0,
NULL);
}
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