1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * Copyright (C) 2018 Samsung Electronics Co., Ltd.
6 #ifndef __KSMBD_CONNECTION_H__
7 #define __KSMBD_CONNECTION_H__
9 #include <linux/list.h>
13 #include <net/inet_connection_sock.h>
14 #include <net/request_sock.h>
15 #include <linux/kthread.h>
16 #include <linux/nls.h>
18 #include "smb_common.h"
19 #include "ksmbd_work.h"
21 #define KSMBD_SOCKET_BACKLOG 16
26 * This is nothing but a HACK. Session status should move to channel
27 * or to session. As of now we have 1 tcp_conn : 1 ksmbd_session, but
28 * we need to change it to 1 tcp_conn : N ksmbd_sessions.
34 KSMBD_SESS_NEED_RECONNECT
,
35 KSMBD_SESS_NEED_NEGOTIATE
39 atomic_t open_files_count
;
40 atomic64_t request_served
;
43 struct ksmbd_transport
;
46 struct smb_version_values
*vals
;
47 struct smb_version_ops
*ops
;
48 struct smb_version_cmds
*cmds
;
49 unsigned int max_cmds
;
50 struct mutex srv_mutex
;
54 struct ksmbd_transport
*transport
;
55 struct nls_table
*local_nls
;
56 struct list_head conns_list
;
57 /* smb session 1 per user */
58 struct list_head sessions
;
59 unsigned long last_active
;
60 /* How many request are running currently */
62 /* References which are made for this Server object*/
64 unsigned int total_credits
;
65 unsigned int outstanding_credits
;
66 spinlock_t credits_lock
;
67 wait_queue_head_t req_running_q
;
68 /* Lock to protect requests list*/
69 spinlock_t request_lock
;
70 struct list_head requests
;
71 struct list_head async_requests
;
73 struct ksmbd_stats stats
;
74 char ClientGUID
[SMB2_CLIENT_GUID_SIZE
];
76 /* pending trans request table */
77 struct trans_state
*recent_trans
;
79 char *ntlmssp_cryptkey
;
82 spinlock_t llist_lock
;
83 struct list_head lock_list
;
85 struct preauth_integrity_info
*preauth_info
;
88 unsigned int auth_mechs
;
89 unsigned int preferred_auth_mech
;
94 /* dialect index that server chose */
99 struct ksmbd_conn_ops
*conn_ops
;
101 /* Preauth Session Table */
102 struct list_head preauth_sess_table
;
104 struct sockaddr_storage peer_addr
;
106 /* Identifier for async message */
107 struct ida async_ida
;
110 __le16 compress_algorithm
;
111 bool posix_ext_supported
;
112 bool signing_negotiated
;
113 __le16 signing_algorithm
;
117 struct ksmbd_conn_ops
{
118 int (*process_fn
)(struct ksmbd_conn
*conn
);
119 int (*terminate_fn
)(struct ksmbd_conn
*conn
);
122 struct ksmbd_transport_ops
{
123 int (*prepare
)(struct ksmbd_transport
*t
);
124 void (*disconnect
)(struct ksmbd_transport
*t
);
125 int (*read
)(struct ksmbd_transport
*t
, char *buf
, unsigned int size
);
126 int (*writev
)(struct ksmbd_transport
*t
, struct kvec
*iovs
, int niov
,
127 int size
, bool need_invalidate_rkey
,
128 unsigned int remote_key
);
129 int (*rdma_read
)(struct ksmbd_transport
*t
, void *buf
, unsigned int len
,
130 u32 remote_key
, u64 remote_offset
, u32 remote_len
);
131 int (*rdma_write
)(struct ksmbd_transport
*t
, void *buf
,
132 unsigned int len
, u32 remote_key
, u64 remote_offset
,
136 struct ksmbd_transport
{
137 struct ksmbd_conn
*conn
;
138 struct ksmbd_transport_ops
*ops
;
139 struct task_struct
*handler
;
142 #define KSMBD_TCP_RECV_TIMEOUT (7 * HZ)
143 #define KSMBD_TCP_SEND_TIMEOUT (5 * HZ)
144 #define KSMBD_TCP_PEER_SOCKADDR(c) ((struct sockaddr *)&((c)->peer_addr))
146 extern struct list_head conn_list
;
147 extern rwlock_t conn_list_lock
;
149 bool ksmbd_conn_alive(struct ksmbd_conn
*conn
);
150 void ksmbd_conn_wait_idle(struct ksmbd_conn
*conn
);
151 struct ksmbd_conn
*ksmbd_conn_alloc(void);
152 void ksmbd_conn_free(struct ksmbd_conn
*conn
);
153 bool ksmbd_conn_lookup_dialect(struct ksmbd_conn
*c
);
154 int ksmbd_conn_write(struct ksmbd_work
*work
);
155 int ksmbd_conn_rdma_read(struct ksmbd_conn
*conn
, void *buf
,
156 unsigned int buflen
, u32 remote_key
, u64 remote_offset
,
158 int ksmbd_conn_rdma_write(struct ksmbd_conn
*conn
, void *buf
,
159 unsigned int buflen
, u32 remote_key
, u64 remote_offset
,
161 void ksmbd_conn_enqueue_request(struct ksmbd_work
*work
);
162 int ksmbd_conn_try_dequeue_request(struct ksmbd_work
*work
);
163 void ksmbd_conn_init_server_callbacks(struct ksmbd_conn_ops
*ops
);
164 int ksmbd_conn_handler_loop(void *p
);
165 int ksmbd_conn_transport_init(void);
166 void ksmbd_conn_transport_destroy(void);
171 * This is a hack. We will move status to a proper place once we land
172 * a multi-sessions support.
174 static inline bool ksmbd_conn_good(struct ksmbd_work
*work
)
176 return work
->conn
->status
== KSMBD_SESS_GOOD
;
179 static inline bool ksmbd_conn_need_negotiate(struct ksmbd_work
*work
)
181 return work
->conn
->status
== KSMBD_SESS_NEED_NEGOTIATE
;
184 static inline bool ksmbd_conn_need_reconnect(struct ksmbd_work
*work
)
186 return work
->conn
->status
== KSMBD_SESS_NEED_RECONNECT
;
189 static inline bool ksmbd_conn_exiting(struct ksmbd_work
*work
)
191 return work
->conn
->status
== KSMBD_SESS_EXITING
;
194 static inline void ksmbd_conn_set_good(struct ksmbd_work
*work
)
196 work
->conn
->status
= KSMBD_SESS_GOOD
;
199 static inline void ksmbd_conn_set_need_negotiate(struct ksmbd_work
*work
)
201 work
->conn
->status
= KSMBD_SESS_NEED_NEGOTIATE
;
204 static inline void ksmbd_conn_set_need_reconnect(struct ksmbd_work
*work
)
206 work
->conn
->status
= KSMBD_SESS_NEED_RECONNECT
;
209 static inline void ksmbd_conn_set_exiting(struct ksmbd_work
*work
)
211 work
->conn
->status
= KSMBD_SESS_EXITING
;
213 #endif /* __CONNECTION_H__ */