aboutsummaryrefslogtreecommitdiff
path: root/fs/ksmbd/connection.h
blob: e5403c587a58c9e86aa151badb0e9a38f0c496d3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 *   Copyright (C) 2018 Samsung Electronics Co., Ltd.
 */

#ifndef __KSMBD_CONNECTION_H__
#define __KSMBD_CONNECTION_H__

#include <linux/list.h>
#include <linux/ip.h>
#include <net/sock.h>
#include <net/tcp.h>
#include <net/inet_connection_sock.h>
#include <net/request_sock.h>
#include <linux/kthread.h>
#include <linux/nls.h>

#include "smb_common.h"
#include "ksmbd_work.h"

#define KSMBD_SOCKET_BACKLOG		16

/*
 * WARNING
 *
 * This is nothing but a HACK. Session status should move to channel
 * or to session. As of now we have 1 tcp_conn : 1 ksmbd_session, but
 * we need to change it to 1 tcp_conn : N ksmbd_sessions.
 */
enum {
	KSMBD_SESS_NEW = 0,
	KSMBD_SESS_GOOD,
	KSMBD_SESS_EXITING,
	KSMBD_SESS_NEED_RECONNECT,
	KSMBD_SESS_NEED_NEGOTIATE
};

struct ksmbd_stats {
	atomic_t			open_files_count;
	atomic64_t			request_served;
};

struct ksmbd_transport;

struct ksmbd_conn {
	struct smb_version_values	*vals;
	struct smb_version_ops		*ops;
	struct smb_version_cmds		*cmds;
	unsigned int			max_cmds;
	struct mutex			srv_mutex;
	int				status;
	unsigned int			cli_cap;
	char				*request_buf;
	struct ksmbd_transport		*transport;
	struct nls_table		*local_nls;
	struct list_head		conns_list;
	/* smb session 1 per user */
	struct list_head		sessions;
	unsigned long			last_active;
	/* How many request are running currently */
	atomic_t			req_running;
	/* References which are made for this Server object*/
	atomic_t			r_count;
	unsigned short			total_credits;
	unsigned short			max_credits;
	spinlock_t			credits_lock;
	wait_queue_head_t		req_running_q;
	/* Lock to protect requests list*/
	spinlock_t			request_lock;
	struct list_head		requests;
	struct list_head		async_requests;
	int				connection_type;
	struct ksmbd_stats		stats;
	char				ClientGUID[SMB2_CLIENT_GUID_SIZE];
	union {
		/* pending trans request table */
		struct trans_state	*recent_trans;
		/* Used by ntlmssp */
		char			*ntlmssp_cryptkey;
	};

	spinlock_t			llist_lock;
	struct list_head		lock_list;

	struct preauth_integrity_info	*preauth_info;

	bool				need_neg;
	unsigned int			auth_mechs;
	unsigned int			preferred_auth_mech;
	bool				sign;
	bool				use_spnego:1;
	__u16				cli_sec_mode;
	__u16				srv_sec_mode;
	/* dialect index that server chose */
	__u16				dialect;

	char				*mechToken;

	struct ksmbd_conn_ops	*conn_ops;

	/* Preauth Session Table */
	struct list_head		preauth_sess_table;

	struct sockaddr_storage		peer_addr;

	/* Identifier for async message */
	struct ida			async_ida;

	__le16				cipher_type;
	__le16				compress_algorithm;
	bool				posix_ext_supported;
	bool				signing_negotiated;
	__le16				signing_algorithm;
	bool				binding;
};

struct ksmbd_conn_ops {
	int	(*process_fn)(struct ksmbd_conn *conn);
	int	(*terminate_fn)(struct ksmbd_conn *conn);
};

struct ksmbd_transport_ops {
	int (*prepare)(struct ksmbd_transport *t);
	void (*disconnect)(struct ksmbd_transport *t);
	int (*read)(struct ksmbd_transport *t, char *buf, unsigned int size);
	int (*writev)(struct ksmbd_transport *t, struct kvec *iovs, int niov,
		      int size, bool need_invalidate_rkey,
		      unsigned int remote_key);
	int (*rdma_read)(struct ksmbd_transport *t, void *buf, unsigned int len,
			 u32 remote_key, u64 remote_offset, u32 remote_len);
	int (*rdma_write)(struct ksmbd_transport *t, void *buf,
			  unsigned int len, u32 remote_key, u64 remote_offset,
			  u32 remote_len);
};

struct ksmbd_transport {
	struct ksmbd_conn		*conn;
	struct ksmbd_transport_ops	*ops;
	struct task_struct		*handler;
};

#define KSMBD_TCP_RECV_TIMEOUT	(7 * HZ)
#define KSMBD_TCP_SEND_TIMEOUT	(5 * HZ)
#define KSMBD_TCP_PEER_SOCKADDR(c)	((struct sockaddr *)&((c)->peer_addr))

extern struct list_head conn_list;
extern rwlock_t conn_list_lock;

bool ksmbd_conn_alive(struct ksmbd_conn *conn);
void ksmbd_conn_wait_idle(struct ksmbd_conn *conn);
struct ksmbd_conn *ksmbd_conn_alloc(void);
void ksmbd_conn_free(struct ksmbd_conn *conn);
bool ksmbd_conn_lookup_dialect(struct ksmbd_conn *c);
int ksmbd_conn_write(struct ksmbd_work *work);
int ksmbd_conn_rdma_read(struct ksmbd_conn *conn, void *buf,
			 unsigned int buflen, u32 remote_key, u64 remote_offset,
			 u32 remote_len);
int ksmbd_conn_rdma_write(struct ksmbd_conn *conn, void *buf,
			  unsigned int buflen, u32 remote_key, u64 remote_offset,
			  u32 remote_len);
void ksmbd_conn_enqueue_request(struct ksmbd_work *work);
int ksmbd_conn_try_dequeue_request(struct ksmbd_work *work);
void ksmbd_conn_init_server_callbacks(struct ksmbd_conn_ops *ops);
int ksmbd_conn_handler_loop(void *p);
int ksmbd_conn_transport_init(void);
void ksmbd_conn_transport_destroy(void);

/*
 * WARNING
 *
 * This is a hack. We will move status to a proper place once we land
 * a multi-sessions support.
 */
static inline bool ksmbd_conn_good(struct ksmbd_work *work)
{
	return work->conn->status == KSMBD_SESS_GOOD;
}

static inline bool ksmbd_conn_need_negotiate(struct ksmbd_work *work)
{
	return work->conn->status == KSMBD_SESS_NEED_NEGOTIATE;
}

static inline bool ksmbd_conn_need_reconnect(struct ksmbd_work *work)
{
	return work->conn->status == KSMBD_SESS_NEED_RECONNECT;
}

static inline bool ksmbd_conn_exiting(struct ksmbd_work *work)
{
	return work->conn->status == KSMBD_SESS_EXITING;
}

static inline void ksmbd_conn_set_good(struct ksmbd_work *work)
{
	work->conn->status = KSMBD_SESS_GOOD;
}

static inline void ksmbd_conn_set_need_negotiate(struct ksmbd_work *work)
{
	work->conn->status = KSMBD_SESS_NEED_NEGOTIATE;
}

static inline void ksmbd_conn_set_need_reconnect(struct ksmbd_work *work)
{
	work->conn->status = KSMBD_SESS_NEED_RECONNECT;
}

static inline void ksmbd_conn_set_exiting(struct ksmbd_work *work)
{
	work->conn->status = KSMBD_SESS_EXITING;
}
#endif /* __CONNECTION_H__ */