user_session.h

  1/* SPDX-License-Identifier: GPL-2.0-or-later */
  2/*
  3 *   Copyright (C) 2018 Samsung Electronics Co., Ltd.
  4 */
  5
  6#ifndef __USER_SESSION_MANAGEMENT_H__
  7#define __USER_SESSION_MANAGEMENT_H__
  8
  9#include <linux/hashtable.h>
 10#include <linux/xarray.h>
 11
 12#include "../smb_common.h"
 13#include "../ntlmssp.h"
 14
 15#define CIFDS_SESSION_FLAG_SMB2		BIT(1)
 16
 17#define PREAUTH_HASHVALUE_SIZE		64
 18
 19struct ksmbd_file_table;
 20
 21struct channel {
 22	__u8			smb3signingkey[SMB3_SIGN_KEY_SIZE];
 23	struct ksmbd_conn	*conn;
 24};
 25
 26struct preauth_session {
 27	__u8			Preauth_HashValue[PREAUTH_HASHVALUE_SIZE];
 28	u64			id;
 29	struct list_head	preauth_entry;
 30};
 31
 32struct ksmbd_session {
 33	u64				id;
 34
 35	__u16				dialect;
 36	char				ClientGUID[SMB2_CLIENT_GUID_SIZE];
 37
 38	struct ksmbd_user		*user;
 39	unsigned int			sequence_number;
 40	unsigned int			flags;
 41
 42	bool				sign;
 43	bool				enc;
 44	bool				is_anonymous;
 45
 46	int				state;
 47	__u8				*Preauth_HashValue;
 48
 49	char				sess_key[CIFS_KEY_SIZE];
 50
 51	struct hlist_node		hlist;
 52	struct rw_semaphore		chann_lock;
 53	struct xarray			ksmbd_chann_list;
 54	struct xarray			tree_conns;
 55	struct ida			tree_conn_ida;
 56	struct xarray			rpc_handle_list;
 57
 58	__u8				smb3encryptionkey[SMB3_ENC_DEC_KEY_SIZE];
 59	__u8				smb3decryptionkey[SMB3_ENC_DEC_KEY_SIZE];
 60	__u8				smb3signingkey[SMB3_SIGN_KEY_SIZE];
 61
 62	struct ksmbd_file_table		file_table;
 63	unsigned long			last_active;
 64	rwlock_t			tree_conns_lock;
 65
 66	atomic_t			refcnt;
 67	struct rw_semaphore		rpc_lock;
 68};
 69
 70static inline int test_session_flag(struct ksmbd_session *sess, int bit)
 71{
 72	return sess->flags & bit;
 73}
 74
 75static inline void set_session_flag(struct ksmbd_session *sess, int bit)
 76{
 77	sess->flags |= bit;
 78}
 79
 80static inline void clear_session_flag(struct ksmbd_session *sess, int bit)
 81{
 82	sess->flags &= ~bit;
 83}
 84
 85struct ksmbd_session *ksmbd_smb2_session_create(void);
 86
 87void ksmbd_session_destroy(struct ksmbd_session *sess);
 88
 89struct ksmbd_session *ksmbd_session_lookup_slowpath(unsigned long long id);
 90struct ksmbd_session *ksmbd_session_lookup(struct ksmbd_conn *conn,
 91					   unsigned long long id);
 92bool is_ksmbd_session_in_connection(struct ksmbd_conn *conn,
 93				     unsigned long long id);
 94int ksmbd_session_register(struct ksmbd_conn *conn,
 95			   struct ksmbd_session *sess);
 96void ksmbd_sessions_deregister(struct ksmbd_conn *conn);
 97struct ksmbd_session *__session_lookup(unsigned long long id);
 98struct ksmbd_session *ksmbd_session_lookup_all(struct ksmbd_conn *conn,
 99					       unsigned long long id);
100void destroy_previous_session(struct ksmbd_conn *conn,
101			      struct ksmbd_user *user, u64 id);
102struct preauth_session *ksmbd_preauth_session_alloc(struct ksmbd_conn *conn,
103						    u64 sess_id);
104struct preauth_session *ksmbd_preauth_session_lookup(struct ksmbd_conn *conn,
105						     unsigned long long id);
106
107int ksmbd_acquire_tree_conn_id(struct ksmbd_session *sess);
108void ksmbd_release_tree_conn_id(struct ksmbd_session *sess, int id);
109
110int ksmbd_session_rpc_open(struct ksmbd_session *sess, char *rpc_name);
111void ksmbd_session_rpc_close(struct ksmbd_session *sess, int id);
112int ksmbd_session_rpc_method(struct ksmbd_session *sess, int id);
113void ksmbd_user_session_get(struct ksmbd_session *sess);
114void ksmbd_user_session_put(struct ksmbd_session *sess);
115#endif /* __USER_SESSION_MANAGEMENT_H__ */