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 19 struct ksmbd_file_table; 20 21 struct channel { 22 char sess_key[CIFS_KEY_SIZE]; 23 __u8 smb3signingkey[SMB3_SIGN_KEY_SIZE]; 24 struct ksmbd_conn *conn; 25 }; 26 27 struct preauth_session { 28 __u8 Preauth_HashValue[PREAUTH_HASHVALUE_SIZE]; 29 u64 id; 30 struct list_head preauth_entry; 31 }; 32 33 struct ksmbd_session { 34 u64 id; 35 36 __u16 dialect; 37 char ClientGUID[SMB2_CLIENT_GUID_SIZE]; 38 39 struct ksmbd_user *user; 40 unsigned int sequence_number; 41 unsigned int flags; 42 43 bool sign; 44 bool enc; 45 bool tearing_down; 46 47 int state; 48 __u8 *Preauth_HashValue; 49 50 char sess_key[CIFS_KEY_SIZE]; 51 u64 kerberos_expiry; 52 53 struct hlist_node hlist; 54 struct rw_semaphore chann_lock; 55 struct xarray ksmbd_chann_list; 56 struct xarray tree_conns; 57 struct ida tree_conn_ida; 58 struct xarray rpc_handle_list; 59 60 __u8 smb3encryptionkey[SMB3_ENC_DEC_KEY_SIZE]; 61 __u8 smb3decryptionkey[SMB3_ENC_DEC_KEY_SIZE]; 62 __u8 smb3signingkey[SMB3_SIGN_KEY_SIZE]; 63 64 struct ksmbd_file_table file_table; 65 unsigned long last_active; 66 struct rw_semaphore tree_conns_lock; 67 68 #ifdef CONFIG_PROC_FS 69 struct proc_dir_entry *proc_entry; 70 #endif 71 atomic_t refcnt; 72 struct rw_semaphore rpc_lock; 73 }; 74 75 #define KSMBD_MAX_CHANNELS 32 76 77 static inline int test_session_flag(struct ksmbd_session *sess, int bit) 78 { 79 return sess->flags & bit; 80 } 81 82 static inline void set_session_flag(struct ksmbd_session *sess, int bit) 83 { 84 sess->flags |= bit; 85 } 86 87 static inline void clear_session_flag(struct ksmbd_session *sess, int bit) 88 { 89 sess->flags &= ~bit; 90 } 91 92 struct ksmbd_session *ksmbd_smb2_session_create(void); 93 94 void ksmbd_session_destroy(struct ksmbd_session *sess); 95 96 struct ksmbd_session *ksmbd_session_lookup_slowpath(unsigned long long id); 97 struct ksmbd_session *ksmbd_session_lookup(struct ksmbd_conn *conn, 98 unsigned long long id); 99 bool is_ksmbd_session_in_connection(struct ksmbd_conn *conn, 100 unsigned long long id); 101 int ksmbd_session_register(struct ksmbd_conn *conn, 102 struct ksmbd_session *sess); 103 void ksmbd_session_unregister(struct ksmbd_conn *conn, 104 struct ksmbd_session *sess); 105 void ksmbd_conn_sessions_cleanup(struct ksmbd_conn *conn); 106 bool ksmbd_conn_has_valid_or_expired_session(struct ksmbd_conn *conn); 107 void ksmbd_expire_sessions(void); 108 struct ksmbd_session *__session_lookup(unsigned long long id); 109 struct ksmbd_session *ksmbd_session_lookup_all(struct ksmbd_conn *conn, 110 unsigned long long id); 111 struct ksmbd_session *ksmbd_session_lookup_all_states(struct ksmbd_conn *conn, 112 unsigned long long id); 113 void destroy_previous_session(struct ksmbd_conn *conn, 114 struct ksmbd_user *user, u64 id); 115 struct preauth_session *ksmbd_preauth_session_alloc(struct ksmbd_conn *conn, 116 u64 sess_id); 117 void ksmbd_preauth_session_destroy(struct ksmbd_conn *conn); 118 struct preauth_session *ksmbd_preauth_session_lookup(struct ksmbd_conn *conn, 119 unsigned long long id); 120 121 int ksmbd_acquire_tree_conn_id(struct ksmbd_session *sess); 122 void ksmbd_release_tree_conn_id(struct ksmbd_session *sess, int id); 123 124 int ksmbd_session_rpc_open(struct ksmbd_session *sess, char *rpc_name); 125 void ksmbd_session_rpc_close(struct ksmbd_session *sess, int id); 126 int ksmbd_session_rpc_method(struct ksmbd_session *sess, int id); 127 void ksmbd_user_session_get(struct ksmbd_session *sess); 128 void ksmbd_user_session_put(struct ksmbd_session *sess); 129 int create_proc_sessions(void); 130 #endif /* __USER_SESSION_MANAGEMENT_H__ */ 131