mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 17:30:02 +00:00
![Namjae Jeon](/assets/img/avatar_default.png)
Add max connections parameter to limit number of maximum simultaneous
connections.
Fixes: 0626e6641f
("cifsd: add server handler for central processing and tranport layers")
Cc: stable@vger.kernel.org
Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
884 lines
21 KiB
C
884 lines
21 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2018 Samsung Electronics Co., Ltd.
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*/
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#include <linux/jhash.h>
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#include <linux/slab.h>
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#include <linux/rwsem.h>
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#include <linux/mutex.h>
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#include <linux/wait.h>
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#include <linux/hashtable.h>
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#include <net/net_namespace.h>
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#include <net/genetlink.h>
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#include <linux/socket.h>
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#include <linux/workqueue.h>
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#include "vfs_cache.h"
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#include "transport_ipc.h"
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#include "server.h"
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#include "smb_common.h"
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#include "mgmt/user_config.h"
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#include "mgmt/share_config.h"
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#include "mgmt/user_session.h"
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#include "mgmt/tree_connect.h"
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#include "mgmt/ksmbd_ida.h"
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#include "connection.h"
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#include "transport_tcp.h"
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#include "transport_rdma.h"
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#define IPC_WAIT_TIMEOUT (2 * HZ)
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#define IPC_MSG_HASH_BITS 3
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static DEFINE_HASHTABLE(ipc_msg_table, IPC_MSG_HASH_BITS);
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static DECLARE_RWSEM(ipc_msg_table_lock);
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static DEFINE_MUTEX(startup_lock);
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static DEFINE_IDA(ipc_ida);
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static unsigned int ksmbd_tools_pid;
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static bool ksmbd_ipc_validate_version(struct genl_info *m)
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{
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if (m->genlhdr->version != KSMBD_GENL_VERSION) {
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pr_err("%s. ksmbd: %d, kernel module: %d. %s.\n",
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"Daemon and kernel module version mismatch",
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m->genlhdr->version,
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KSMBD_GENL_VERSION,
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"User-space ksmbd should terminate");
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return false;
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}
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return true;
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}
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struct ksmbd_ipc_msg {
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unsigned int type;
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unsigned int sz;
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unsigned char payload[];
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};
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struct ipc_msg_table_entry {
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unsigned int handle;
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unsigned int type;
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wait_queue_head_t wait;
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struct hlist_node ipc_table_hlist;
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void *response;
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};
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static struct delayed_work ipc_timer_work;
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static int handle_startup_event(struct sk_buff *skb, struct genl_info *info);
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static int handle_unsupported_event(struct sk_buff *skb, struct genl_info *info);
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static int handle_generic_event(struct sk_buff *skb, struct genl_info *info);
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static int ksmbd_ipc_heartbeat_request(void);
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static const struct nla_policy ksmbd_nl_policy[KSMBD_EVENT_MAX] = {
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[KSMBD_EVENT_UNSPEC] = {
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.len = 0,
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},
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[KSMBD_EVENT_HEARTBEAT_REQUEST] = {
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.len = sizeof(struct ksmbd_heartbeat),
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},
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[KSMBD_EVENT_STARTING_UP] = {
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.len = sizeof(struct ksmbd_startup_request),
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},
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[KSMBD_EVENT_SHUTTING_DOWN] = {
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.len = sizeof(struct ksmbd_shutdown_request),
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},
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[KSMBD_EVENT_LOGIN_REQUEST] = {
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.len = sizeof(struct ksmbd_login_request),
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},
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[KSMBD_EVENT_LOGIN_RESPONSE] = {
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.len = sizeof(struct ksmbd_login_response),
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},
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[KSMBD_EVENT_SHARE_CONFIG_REQUEST] = {
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.len = sizeof(struct ksmbd_share_config_request),
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},
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[KSMBD_EVENT_SHARE_CONFIG_RESPONSE] = {
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.len = sizeof(struct ksmbd_share_config_response),
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},
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[KSMBD_EVENT_TREE_CONNECT_REQUEST] = {
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.len = sizeof(struct ksmbd_tree_connect_request),
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},
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[KSMBD_EVENT_TREE_CONNECT_RESPONSE] = {
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.len = sizeof(struct ksmbd_tree_connect_response),
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},
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[KSMBD_EVENT_TREE_DISCONNECT_REQUEST] = {
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.len = sizeof(struct ksmbd_tree_disconnect_request),
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},
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[KSMBD_EVENT_LOGOUT_REQUEST] = {
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.len = sizeof(struct ksmbd_logout_request),
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},
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[KSMBD_EVENT_RPC_REQUEST] = {
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},
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[KSMBD_EVENT_RPC_RESPONSE] = {
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},
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[KSMBD_EVENT_SPNEGO_AUTHEN_REQUEST] = {
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},
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[KSMBD_EVENT_SPNEGO_AUTHEN_RESPONSE] = {
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},
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};
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static struct genl_ops ksmbd_genl_ops[] = {
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{
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.cmd = KSMBD_EVENT_UNSPEC,
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.doit = handle_unsupported_event,
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},
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{
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.cmd = KSMBD_EVENT_HEARTBEAT_REQUEST,
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.doit = handle_unsupported_event,
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},
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{
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.cmd = KSMBD_EVENT_STARTING_UP,
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.doit = handle_startup_event,
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},
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{
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.cmd = KSMBD_EVENT_SHUTTING_DOWN,
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.doit = handle_unsupported_event,
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},
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{
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.cmd = KSMBD_EVENT_LOGIN_REQUEST,
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.doit = handle_unsupported_event,
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},
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{
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.cmd = KSMBD_EVENT_LOGIN_RESPONSE,
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.doit = handle_generic_event,
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},
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{
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.cmd = KSMBD_EVENT_SHARE_CONFIG_REQUEST,
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.doit = handle_unsupported_event,
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},
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{
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.cmd = KSMBD_EVENT_SHARE_CONFIG_RESPONSE,
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.doit = handle_generic_event,
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},
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{
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.cmd = KSMBD_EVENT_TREE_CONNECT_REQUEST,
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.doit = handle_unsupported_event,
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},
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{
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.cmd = KSMBD_EVENT_TREE_CONNECT_RESPONSE,
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.doit = handle_generic_event,
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},
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{
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.cmd = KSMBD_EVENT_TREE_DISCONNECT_REQUEST,
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.doit = handle_unsupported_event,
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},
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{
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.cmd = KSMBD_EVENT_LOGOUT_REQUEST,
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.doit = handle_unsupported_event,
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},
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{
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.cmd = KSMBD_EVENT_RPC_REQUEST,
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.doit = handle_unsupported_event,
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},
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{
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.cmd = KSMBD_EVENT_RPC_RESPONSE,
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.doit = handle_generic_event,
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},
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{
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.cmd = KSMBD_EVENT_SPNEGO_AUTHEN_REQUEST,
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.doit = handle_unsupported_event,
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},
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{
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.cmd = KSMBD_EVENT_SPNEGO_AUTHEN_RESPONSE,
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.doit = handle_generic_event,
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},
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};
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static struct genl_family ksmbd_genl_family = {
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.name = KSMBD_GENL_NAME,
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.version = KSMBD_GENL_VERSION,
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.hdrsize = 0,
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.maxattr = KSMBD_EVENT_MAX,
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.netnsok = true,
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.module = THIS_MODULE,
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.ops = ksmbd_genl_ops,
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.n_ops = ARRAY_SIZE(ksmbd_genl_ops),
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.resv_start_op = KSMBD_EVENT_SPNEGO_AUTHEN_RESPONSE + 1,
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};
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static void ksmbd_nl_init_fixup(void)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(ksmbd_genl_ops); i++)
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ksmbd_genl_ops[i].validate = GENL_DONT_VALIDATE_STRICT |
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GENL_DONT_VALIDATE_DUMP;
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ksmbd_genl_family.policy = ksmbd_nl_policy;
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}
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static int rpc_context_flags(struct ksmbd_session *sess)
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{
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if (user_guest(sess->user))
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return KSMBD_RPC_RESTRICTED_CONTEXT;
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return 0;
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}
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static void ipc_update_last_active(void)
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{
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if (server_conf.ipc_timeout)
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server_conf.ipc_last_active = jiffies;
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}
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static struct ksmbd_ipc_msg *ipc_msg_alloc(size_t sz)
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{
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struct ksmbd_ipc_msg *msg;
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size_t msg_sz = sz + sizeof(struct ksmbd_ipc_msg);
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msg = kvmalloc(msg_sz, GFP_KERNEL | __GFP_ZERO);
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if (msg)
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msg->sz = sz;
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return msg;
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}
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static void ipc_msg_free(struct ksmbd_ipc_msg *msg)
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{
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kvfree(msg);
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}
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static void ipc_msg_handle_free(int handle)
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{
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if (handle >= 0)
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ksmbd_release_id(&ipc_ida, handle);
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}
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static int handle_response(int type, void *payload, size_t sz)
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{
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unsigned int handle = *(unsigned int *)payload;
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struct ipc_msg_table_entry *entry;
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int ret = 0;
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ipc_update_last_active();
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down_read(&ipc_msg_table_lock);
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hash_for_each_possible(ipc_msg_table, entry, ipc_table_hlist, handle) {
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if (handle != entry->handle)
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continue;
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entry->response = NULL;
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/*
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* Response message type value should be equal to
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* request message type + 1.
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*/
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if (entry->type + 1 != type) {
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pr_err("Waiting for IPC type %d, got %d. Ignore.\n",
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entry->type + 1, type);
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}
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entry->response = kvmalloc(sz, GFP_KERNEL | __GFP_ZERO);
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if (!entry->response) {
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ret = -ENOMEM;
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break;
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}
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memcpy(entry->response, payload, sz);
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wake_up_interruptible(&entry->wait);
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ret = 0;
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break;
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}
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up_read(&ipc_msg_table_lock);
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return ret;
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}
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static int ipc_server_config_on_startup(struct ksmbd_startup_request *req)
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{
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int ret;
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ksmbd_set_fd_limit(req->file_max);
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server_conf.flags = req->flags;
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server_conf.signing = req->signing;
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server_conf.tcp_port = req->tcp_port;
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server_conf.ipc_timeout = req->ipc_timeout * HZ;
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server_conf.deadtime = req->deadtime * SMB_ECHO_INTERVAL;
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server_conf.share_fake_fscaps = req->share_fake_fscaps;
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ksmbd_init_domain(req->sub_auth);
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if (req->smb2_max_read)
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init_smb2_max_read_size(req->smb2_max_read);
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if (req->smb2_max_write)
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init_smb2_max_write_size(req->smb2_max_write);
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if (req->smb2_max_trans)
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init_smb2_max_trans_size(req->smb2_max_trans);
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if (req->smb2_max_credits)
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init_smb2_max_credits(req->smb2_max_credits);
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if (req->smbd_max_io_size)
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init_smbd_max_io_size(req->smbd_max_io_size);
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if (req->max_connections)
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server_conf.max_connections = req->max_connections;
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ret = ksmbd_set_netbios_name(req->netbios_name);
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ret |= ksmbd_set_server_string(req->server_string);
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ret |= ksmbd_set_work_group(req->work_group);
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ret |= ksmbd_tcp_set_interfaces(KSMBD_STARTUP_CONFIG_INTERFACES(req),
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req->ifc_list_sz);
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if (ret) {
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pr_err("Server configuration error: %s %s %s\n",
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req->netbios_name, req->server_string,
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req->work_group);
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return ret;
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}
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if (req->min_prot[0]) {
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ret = ksmbd_lookup_protocol_idx(req->min_prot);
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if (ret >= 0)
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server_conf.min_protocol = ret;
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}
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if (req->max_prot[0]) {
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ret = ksmbd_lookup_protocol_idx(req->max_prot);
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if (ret >= 0)
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server_conf.max_protocol = ret;
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}
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if (server_conf.ipc_timeout)
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schedule_delayed_work(&ipc_timer_work, server_conf.ipc_timeout);
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return 0;
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}
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static int handle_startup_event(struct sk_buff *skb, struct genl_info *info)
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{
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int ret = 0;
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#ifdef CONFIG_SMB_SERVER_CHECK_CAP_NET_ADMIN
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if (!netlink_capable(skb, CAP_NET_ADMIN))
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return -EPERM;
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#endif
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if (!ksmbd_ipc_validate_version(info))
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return -EINVAL;
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if (!info->attrs[KSMBD_EVENT_STARTING_UP])
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return -EINVAL;
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mutex_lock(&startup_lock);
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if (!ksmbd_server_configurable()) {
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mutex_unlock(&startup_lock);
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pr_err("Server reset is in progress, can't start daemon\n");
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return -EINVAL;
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}
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if (ksmbd_tools_pid) {
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if (ksmbd_ipc_heartbeat_request() == 0) {
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ret = -EINVAL;
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goto out;
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}
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pr_err("Reconnect to a new user space daemon\n");
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} else {
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struct ksmbd_startup_request *req;
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req = nla_data(info->attrs[info->genlhdr->cmd]);
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ret = ipc_server_config_on_startup(req);
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if (ret)
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goto out;
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server_queue_ctrl_init_work();
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}
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ksmbd_tools_pid = info->snd_portid;
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ipc_update_last_active();
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out:
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mutex_unlock(&startup_lock);
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return ret;
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}
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static int handle_unsupported_event(struct sk_buff *skb, struct genl_info *info)
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{
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pr_err("Unknown IPC event: %d, ignore.\n", info->genlhdr->cmd);
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return -EINVAL;
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}
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static int handle_generic_event(struct sk_buff *skb, struct genl_info *info)
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{
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void *payload;
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int sz;
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int type = info->genlhdr->cmd;
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#ifdef CONFIG_SMB_SERVER_CHECK_CAP_NET_ADMIN
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if (!netlink_capable(skb, CAP_NET_ADMIN))
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return -EPERM;
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#endif
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if (type >= KSMBD_EVENT_MAX) {
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WARN_ON(1);
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return -EINVAL;
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}
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if (!ksmbd_ipc_validate_version(info))
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return -EINVAL;
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if (!info->attrs[type])
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return -EINVAL;
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payload = nla_data(info->attrs[info->genlhdr->cmd]);
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sz = nla_len(info->attrs[info->genlhdr->cmd]);
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return handle_response(type, payload, sz);
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}
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static int ipc_msg_send(struct ksmbd_ipc_msg *msg)
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{
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struct genlmsghdr *nlh;
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struct sk_buff *skb;
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int ret = -EINVAL;
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if (!ksmbd_tools_pid)
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return ret;
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skb = genlmsg_new(msg->sz, GFP_KERNEL);
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if (!skb)
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return -ENOMEM;
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nlh = genlmsg_put(skb, 0, 0, &ksmbd_genl_family, 0, msg->type);
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if (!nlh)
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goto out;
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ret = nla_put(skb, msg->type, msg->sz, msg->payload);
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if (ret) {
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genlmsg_cancel(skb, nlh);
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goto out;
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}
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genlmsg_end(skb, nlh);
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ret = genlmsg_unicast(&init_net, skb, ksmbd_tools_pid);
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if (!ret)
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ipc_update_last_active();
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return ret;
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out:
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nlmsg_free(skb);
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return ret;
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}
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static void *ipc_msg_send_request(struct ksmbd_ipc_msg *msg, unsigned int handle)
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{
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struct ipc_msg_table_entry entry;
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int ret;
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if ((int)handle < 0)
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return NULL;
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entry.type = msg->type;
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entry.response = NULL;
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init_waitqueue_head(&entry.wait);
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down_write(&ipc_msg_table_lock);
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entry.handle = handle;
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hash_add(ipc_msg_table, &entry.ipc_table_hlist, entry.handle);
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up_write(&ipc_msg_table_lock);
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ret = ipc_msg_send(msg);
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if (ret)
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goto out;
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ret = wait_event_interruptible_timeout(entry.wait,
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entry.response != NULL,
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IPC_WAIT_TIMEOUT);
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out:
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down_write(&ipc_msg_table_lock);
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hash_del(&entry.ipc_table_hlist);
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up_write(&ipc_msg_table_lock);
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return entry.response;
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}
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static int ksmbd_ipc_heartbeat_request(void)
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{
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struct ksmbd_ipc_msg *msg;
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int ret;
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msg = ipc_msg_alloc(sizeof(struct ksmbd_heartbeat));
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if (!msg)
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return -EINVAL;
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msg->type = KSMBD_EVENT_HEARTBEAT_REQUEST;
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ret = ipc_msg_send(msg);
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ipc_msg_free(msg);
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|
return ret;
|
|
}
|
|
|
|
struct ksmbd_login_response *ksmbd_ipc_login_request(const char *account)
|
|
{
|
|
struct ksmbd_ipc_msg *msg;
|
|
struct ksmbd_login_request *req;
|
|
struct ksmbd_login_response *resp;
|
|
|
|
if (strlen(account) >= KSMBD_REQ_MAX_ACCOUNT_NAME_SZ)
|
|
return NULL;
|
|
|
|
msg = ipc_msg_alloc(sizeof(struct ksmbd_login_request));
|
|
if (!msg)
|
|
return NULL;
|
|
|
|
msg->type = KSMBD_EVENT_LOGIN_REQUEST;
|
|
req = (struct ksmbd_login_request *)msg->payload;
|
|
req->handle = ksmbd_acquire_id(&ipc_ida);
|
|
strscpy(req->account, account, KSMBD_REQ_MAX_ACCOUNT_NAME_SZ);
|
|
|
|
resp = ipc_msg_send_request(msg, req->handle);
|
|
ipc_msg_handle_free(req->handle);
|
|
ipc_msg_free(msg);
|
|
return resp;
|
|
}
|
|
|
|
struct ksmbd_spnego_authen_response *
|
|
ksmbd_ipc_spnego_authen_request(const char *spnego_blob, int blob_len)
|
|
{
|
|
struct ksmbd_ipc_msg *msg;
|
|
struct ksmbd_spnego_authen_request *req;
|
|
struct ksmbd_spnego_authen_response *resp;
|
|
|
|
msg = ipc_msg_alloc(sizeof(struct ksmbd_spnego_authen_request) +
|
|
blob_len + 1);
|
|
if (!msg)
|
|
return NULL;
|
|
|
|
msg->type = KSMBD_EVENT_SPNEGO_AUTHEN_REQUEST;
|
|
req = (struct ksmbd_spnego_authen_request *)msg->payload;
|
|
req->handle = ksmbd_acquire_id(&ipc_ida);
|
|
req->spnego_blob_len = blob_len;
|
|
memcpy(req->spnego_blob, spnego_blob, blob_len);
|
|
|
|
resp = ipc_msg_send_request(msg, req->handle);
|
|
ipc_msg_handle_free(req->handle);
|
|
ipc_msg_free(msg);
|
|
return resp;
|
|
}
|
|
|
|
struct ksmbd_tree_connect_response *
|
|
ksmbd_ipc_tree_connect_request(struct ksmbd_session *sess,
|
|
struct ksmbd_share_config *share,
|
|
struct ksmbd_tree_connect *tree_conn,
|
|
struct sockaddr *peer_addr)
|
|
{
|
|
struct ksmbd_ipc_msg *msg;
|
|
struct ksmbd_tree_connect_request *req;
|
|
struct ksmbd_tree_connect_response *resp;
|
|
|
|
if (strlen(user_name(sess->user)) >= KSMBD_REQ_MAX_ACCOUNT_NAME_SZ)
|
|
return NULL;
|
|
|
|
if (strlen(share->name) >= KSMBD_REQ_MAX_SHARE_NAME)
|
|
return NULL;
|
|
|
|
msg = ipc_msg_alloc(sizeof(struct ksmbd_tree_connect_request));
|
|
if (!msg)
|
|
return NULL;
|
|
|
|
msg->type = KSMBD_EVENT_TREE_CONNECT_REQUEST;
|
|
req = (struct ksmbd_tree_connect_request *)msg->payload;
|
|
|
|
req->handle = ksmbd_acquire_id(&ipc_ida);
|
|
req->account_flags = sess->user->flags;
|
|
req->session_id = sess->id;
|
|
req->connect_id = tree_conn->id;
|
|
strscpy(req->account, user_name(sess->user), KSMBD_REQ_MAX_ACCOUNT_NAME_SZ);
|
|
strscpy(req->share, share->name, KSMBD_REQ_MAX_SHARE_NAME);
|
|
snprintf(req->peer_addr, sizeof(req->peer_addr), "%pIS", peer_addr);
|
|
|
|
if (peer_addr->sa_family == AF_INET6)
|
|
req->flags |= KSMBD_TREE_CONN_FLAG_REQUEST_IPV6;
|
|
if (test_session_flag(sess, CIFDS_SESSION_FLAG_SMB2))
|
|
req->flags |= KSMBD_TREE_CONN_FLAG_REQUEST_SMB2;
|
|
|
|
resp = ipc_msg_send_request(msg, req->handle);
|
|
ipc_msg_handle_free(req->handle);
|
|
ipc_msg_free(msg);
|
|
return resp;
|
|
}
|
|
|
|
int ksmbd_ipc_tree_disconnect_request(unsigned long long session_id,
|
|
unsigned long long connect_id)
|
|
{
|
|
struct ksmbd_ipc_msg *msg;
|
|
struct ksmbd_tree_disconnect_request *req;
|
|
int ret;
|
|
|
|
msg = ipc_msg_alloc(sizeof(struct ksmbd_tree_disconnect_request));
|
|
if (!msg)
|
|
return -ENOMEM;
|
|
|
|
msg->type = KSMBD_EVENT_TREE_DISCONNECT_REQUEST;
|
|
req = (struct ksmbd_tree_disconnect_request *)msg->payload;
|
|
req->session_id = session_id;
|
|
req->connect_id = connect_id;
|
|
|
|
ret = ipc_msg_send(msg);
|
|
ipc_msg_free(msg);
|
|
return ret;
|
|
}
|
|
|
|
int ksmbd_ipc_logout_request(const char *account, int flags)
|
|
{
|
|
struct ksmbd_ipc_msg *msg;
|
|
struct ksmbd_logout_request *req;
|
|
int ret;
|
|
|
|
if (strlen(account) >= KSMBD_REQ_MAX_ACCOUNT_NAME_SZ)
|
|
return -EINVAL;
|
|
|
|
msg = ipc_msg_alloc(sizeof(struct ksmbd_logout_request));
|
|
if (!msg)
|
|
return -ENOMEM;
|
|
|
|
msg->type = KSMBD_EVENT_LOGOUT_REQUEST;
|
|
req = (struct ksmbd_logout_request *)msg->payload;
|
|
req->account_flags = flags;
|
|
strscpy(req->account, account, KSMBD_REQ_MAX_ACCOUNT_NAME_SZ);
|
|
|
|
ret = ipc_msg_send(msg);
|
|
ipc_msg_free(msg);
|
|
return ret;
|
|
}
|
|
|
|
struct ksmbd_share_config_response *
|
|
ksmbd_ipc_share_config_request(const char *name)
|
|
{
|
|
struct ksmbd_ipc_msg *msg;
|
|
struct ksmbd_share_config_request *req;
|
|
struct ksmbd_share_config_response *resp;
|
|
|
|
if (strlen(name) >= KSMBD_REQ_MAX_SHARE_NAME)
|
|
return NULL;
|
|
|
|
msg = ipc_msg_alloc(sizeof(struct ksmbd_share_config_request));
|
|
if (!msg)
|
|
return NULL;
|
|
|
|
msg->type = KSMBD_EVENT_SHARE_CONFIG_REQUEST;
|
|
req = (struct ksmbd_share_config_request *)msg->payload;
|
|
req->handle = ksmbd_acquire_id(&ipc_ida);
|
|
strscpy(req->share_name, name, KSMBD_REQ_MAX_SHARE_NAME);
|
|
|
|
resp = ipc_msg_send_request(msg, req->handle);
|
|
ipc_msg_handle_free(req->handle);
|
|
ipc_msg_free(msg);
|
|
return resp;
|
|
}
|
|
|
|
struct ksmbd_rpc_command *ksmbd_rpc_open(struct ksmbd_session *sess, int handle)
|
|
{
|
|
struct ksmbd_ipc_msg *msg;
|
|
struct ksmbd_rpc_command *req;
|
|
struct ksmbd_rpc_command *resp;
|
|
|
|
msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command));
|
|
if (!msg)
|
|
return NULL;
|
|
|
|
msg->type = KSMBD_EVENT_RPC_REQUEST;
|
|
req = (struct ksmbd_rpc_command *)msg->payload;
|
|
req->handle = handle;
|
|
req->flags = ksmbd_session_rpc_method(sess, handle);
|
|
req->flags |= KSMBD_RPC_OPEN_METHOD;
|
|
req->payload_sz = 0;
|
|
|
|
resp = ipc_msg_send_request(msg, req->handle);
|
|
ipc_msg_free(msg);
|
|
return resp;
|
|
}
|
|
|
|
struct ksmbd_rpc_command *ksmbd_rpc_close(struct ksmbd_session *sess, int handle)
|
|
{
|
|
struct ksmbd_ipc_msg *msg;
|
|
struct ksmbd_rpc_command *req;
|
|
struct ksmbd_rpc_command *resp;
|
|
|
|
msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command));
|
|
if (!msg)
|
|
return NULL;
|
|
|
|
msg->type = KSMBD_EVENT_RPC_REQUEST;
|
|
req = (struct ksmbd_rpc_command *)msg->payload;
|
|
req->handle = handle;
|
|
req->flags = ksmbd_session_rpc_method(sess, handle);
|
|
req->flags |= KSMBD_RPC_CLOSE_METHOD;
|
|
req->payload_sz = 0;
|
|
|
|
resp = ipc_msg_send_request(msg, req->handle);
|
|
ipc_msg_free(msg);
|
|
return resp;
|
|
}
|
|
|
|
struct ksmbd_rpc_command *ksmbd_rpc_write(struct ksmbd_session *sess, int handle,
|
|
void *payload, size_t payload_sz)
|
|
{
|
|
struct ksmbd_ipc_msg *msg;
|
|
struct ksmbd_rpc_command *req;
|
|
struct ksmbd_rpc_command *resp;
|
|
|
|
msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command) + payload_sz + 1);
|
|
if (!msg)
|
|
return NULL;
|
|
|
|
msg->type = KSMBD_EVENT_RPC_REQUEST;
|
|
req = (struct ksmbd_rpc_command *)msg->payload;
|
|
req->handle = handle;
|
|
req->flags = ksmbd_session_rpc_method(sess, handle);
|
|
req->flags |= rpc_context_flags(sess);
|
|
req->flags |= KSMBD_RPC_WRITE_METHOD;
|
|
req->payload_sz = payload_sz;
|
|
memcpy(req->payload, payload, payload_sz);
|
|
|
|
resp = ipc_msg_send_request(msg, req->handle);
|
|
ipc_msg_free(msg);
|
|
return resp;
|
|
}
|
|
|
|
struct ksmbd_rpc_command *ksmbd_rpc_read(struct ksmbd_session *sess, int handle)
|
|
{
|
|
struct ksmbd_ipc_msg *msg;
|
|
struct ksmbd_rpc_command *req;
|
|
struct ksmbd_rpc_command *resp;
|
|
|
|
msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command));
|
|
if (!msg)
|
|
return NULL;
|
|
|
|
msg->type = KSMBD_EVENT_RPC_REQUEST;
|
|
req = (struct ksmbd_rpc_command *)msg->payload;
|
|
req->handle = handle;
|
|
req->flags = ksmbd_session_rpc_method(sess, handle);
|
|
req->flags |= rpc_context_flags(sess);
|
|
req->flags |= KSMBD_RPC_READ_METHOD;
|
|
req->payload_sz = 0;
|
|
|
|
resp = ipc_msg_send_request(msg, req->handle);
|
|
ipc_msg_free(msg);
|
|
return resp;
|
|
}
|
|
|
|
struct ksmbd_rpc_command *ksmbd_rpc_ioctl(struct ksmbd_session *sess, int handle,
|
|
void *payload, size_t payload_sz)
|
|
{
|
|
struct ksmbd_ipc_msg *msg;
|
|
struct ksmbd_rpc_command *req;
|
|
struct ksmbd_rpc_command *resp;
|
|
|
|
msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command) + payload_sz + 1);
|
|
if (!msg)
|
|
return NULL;
|
|
|
|
msg->type = KSMBD_EVENT_RPC_REQUEST;
|
|
req = (struct ksmbd_rpc_command *)msg->payload;
|
|
req->handle = handle;
|
|
req->flags = ksmbd_session_rpc_method(sess, handle);
|
|
req->flags |= rpc_context_flags(sess);
|
|
req->flags |= KSMBD_RPC_IOCTL_METHOD;
|
|
req->payload_sz = payload_sz;
|
|
memcpy(req->payload, payload, payload_sz);
|
|
|
|
resp = ipc_msg_send_request(msg, req->handle);
|
|
ipc_msg_free(msg);
|
|
return resp;
|
|
}
|
|
|
|
struct ksmbd_rpc_command *ksmbd_rpc_rap(struct ksmbd_session *sess, void *payload,
|
|
size_t payload_sz)
|
|
{
|
|
struct ksmbd_ipc_msg *msg;
|
|
struct ksmbd_rpc_command *req;
|
|
struct ksmbd_rpc_command *resp;
|
|
|
|
msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command) + payload_sz + 1);
|
|
if (!msg)
|
|
return NULL;
|
|
|
|
msg->type = KSMBD_EVENT_RPC_REQUEST;
|
|
req = (struct ksmbd_rpc_command *)msg->payload;
|
|
req->handle = ksmbd_acquire_id(&ipc_ida);
|
|
req->flags = rpc_context_flags(sess);
|
|
req->flags |= KSMBD_RPC_RAP_METHOD;
|
|
req->payload_sz = payload_sz;
|
|
memcpy(req->payload, payload, payload_sz);
|
|
|
|
resp = ipc_msg_send_request(msg, req->handle);
|
|
ipc_msg_handle_free(req->handle);
|
|
ipc_msg_free(msg);
|
|
return resp;
|
|
}
|
|
|
|
static int __ipc_heartbeat(void)
|
|
{
|
|
unsigned long delta;
|
|
|
|
if (!ksmbd_server_running())
|
|
return 0;
|
|
|
|
if (time_after(jiffies, server_conf.ipc_last_active)) {
|
|
delta = (jiffies - server_conf.ipc_last_active);
|
|
} else {
|
|
ipc_update_last_active();
|
|
schedule_delayed_work(&ipc_timer_work,
|
|
server_conf.ipc_timeout);
|
|
return 0;
|
|
}
|
|
|
|
if (delta < server_conf.ipc_timeout) {
|
|
schedule_delayed_work(&ipc_timer_work,
|
|
server_conf.ipc_timeout - delta);
|
|
return 0;
|
|
}
|
|
|
|
if (ksmbd_ipc_heartbeat_request() == 0) {
|
|
schedule_delayed_work(&ipc_timer_work,
|
|
server_conf.ipc_timeout);
|
|
return 0;
|
|
}
|
|
|
|
mutex_lock(&startup_lock);
|
|
WRITE_ONCE(server_conf.state, SERVER_STATE_RESETTING);
|
|
server_conf.ipc_last_active = 0;
|
|
ksmbd_tools_pid = 0;
|
|
pr_err("No IPC daemon response for %lus\n", delta / HZ);
|
|
mutex_unlock(&startup_lock);
|
|
return -EINVAL;
|
|
}
|
|
|
|
static void ipc_timer_heartbeat(struct work_struct *w)
|
|
{
|
|
if (__ipc_heartbeat())
|
|
server_queue_ctrl_reset_work();
|
|
}
|
|
|
|
int ksmbd_ipc_id_alloc(void)
|
|
{
|
|
return ksmbd_acquire_id(&ipc_ida);
|
|
}
|
|
|
|
void ksmbd_rpc_id_free(int handle)
|
|
{
|
|
ksmbd_release_id(&ipc_ida, handle);
|
|
}
|
|
|
|
void ksmbd_ipc_release(void)
|
|
{
|
|
cancel_delayed_work_sync(&ipc_timer_work);
|
|
genl_unregister_family(&ksmbd_genl_family);
|
|
}
|
|
|
|
void ksmbd_ipc_soft_reset(void)
|
|
{
|
|
mutex_lock(&startup_lock);
|
|
ksmbd_tools_pid = 0;
|
|
cancel_delayed_work_sync(&ipc_timer_work);
|
|
mutex_unlock(&startup_lock);
|
|
}
|
|
|
|
int ksmbd_ipc_init(void)
|
|
{
|
|
int ret = 0;
|
|
|
|
ksmbd_nl_init_fixup();
|
|
INIT_DELAYED_WORK(&ipc_timer_work, ipc_timer_heartbeat);
|
|
|
|
ret = genl_register_family(&ksmbd_genl_family);
|
|
if (ret) {
|
|
pr_err("Failed to register KSMBD netlink interface %d\n", ret);
|
|
cancel_delayed_work_sync(&ipc_timer_work);
|
|
}
|
|
|
|
return ret;
|
|
}
|