1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3 * Copyright (C) 2018 Samsung Electronics Co., Ltd.
4 */
5
6 #ifndef __KSMBD_CONNECTION_H__
7 #define __KSMBD_CONNECTION_H__
8
9 #include <linux/list.h>
10 #include <linux/ip.h>
11 #include <net/sock.h>
12 #include <net/tcp.h>
13 #include <net/inet_connection_sock.h>
14 #include <net/request_sock.h>
15 #include <linux/kthread.h>
16 #include <linux/nls.h>
17 #include <linux/unicode.h>
18
19 #include "smb_common.h"
20 #include "ksmbd_work.h"
21
22 #define KSMBD_SOCKET_BACKLOG 16
23
24 enum {
25 KSMBD_SESS_NEW = 0,
26 KSMBD_SESS_GOOD,
27 KSMBD_SESS_EXITING,
28 KSMBD_SESS_NEED_RECONNECT,
29 KSMBD_SESS_NEED_NEGOTIATE,
30 KSMBD_SESS_NEED_SETUP,
31 KSMBD_SESS_RELEASING
32 };
33
34 struct ksmbd_stats {
35 atomic_t open_files_count;
36 atomic64_t request_served;
37 };
38
39 struct ksmbd_transport;
40
41 struct ksmbd_conn {
42 struct smb_version_values *vals;
43 struct smb_version_ops *ops;
44 struct smb_version_cmds *cmds;
45 unsigned int max_cmds;
46 struct mutex srv_mutex;
47 int status;
48 unsigned int cli_cap;
49 __be32 inet_addr;
50 char *request_buf;
51 struct ksmbd_transport *transport;
52 struct nls_table *local_nls;
53 struct unicode_map *um;
54 struct list_head conns_list;
55 struct rw_semaphore session_lock;
56 /* smb session 1 per user */
57 struct xarray sessions;
58 unsigned long last_active;
59 /* How many request are running currently */
60 atomic_t req_running;
61 /* References which are made for this Server object*/
62 atomic_t r_count;
63 unsigned int total_credits;
64 unsigned int outstanding_credits;
65 spinlock_t credits_lock;
66 wait_queue_head_t req_running_q;
67 wait_queue_head_t r_count_q;
68 /* Lock to protect requests list*/
69 spinlock_t request_lock;
70 struct list_head requests;
71 struct list_head async_requests;
72 int connection_type;
73 struct ksmbd_stats stats;
74 char ClientGUID[SMB2_CLIENT_GUID_SIZE];
75 struct ntlmssp_auth ntlmssp;
76
77 spinlock_t llist_lock;
78 struct list_head lock_list;
79
80 struct preauth_integrity_info *preauth_info;
81
82 bool need_neg;
83 unsigned int auth_mechs;
84 unsigned int preferred_auth_mech;
85 bool sign;
86 bool use_spnego:1;
87 __u16 cli_sec_mode;
88 __u16 srv_sec_mode;
89 /* dialect index that server chose */
90 __u16 dialect;
91
92 char *mechToken;
93 unsigned int mechTokenLen;
94
95 struct ksmbd_conn_ops *conn_ops;
96
97 /* Preauth Session Table */
98 struct list_head preauth_sess_table;
99
100 struct sockaddr_storage peer_addr;
101
102 /* Identifier for async message */
103 struct ida async_ida;
104
105 __le16 cipher_type;
106 __le16 compress_algorithm;
107 bool posix_ext_supported;
108 bool signing_negotiated;
109 __le16 signing_algorithm;
110 bool binding;
111 atomic_t refcnt;
112 bool is_aapl;
113 };
114
115 struct ksmbd_conn_ops {
116 int (*process_fn)(struct ksmbd_conn *conn);
117 int (*terminate_fn)(struct ksmbd_conn *conn);
118 };
119
120 struct ksmbd_transport_ops {
121 int (*prepare)(struct ksmbd_transport *t);
122 void (*disconnect)(struct ksmbd_transport *t);
123 void (*shutdown)(struct ksmbd_transport *t);
124 int (*read)(struct ksmbd_transport *t, char *buf,
125 unsigned int size, int max_retries);
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,
130 void *buf, unsigned int len,
131 struct smb2_buffer_desc_v1 *desc,
132 unsigned int desc_len);
133 int (*rdma_write)(struct ksmbd_transport *t,
134 void *buf, unsigned int len,
135 struct smb2_buffer_desc_v1 *desc,
136 unsigned int desc_len);
137 void (*free_transport)(struct ksmbd_transport *kt);
138 };
139
140 struct ksmbd_transport {
141 struct ksmbd_conn *conn;
142 const struct ksmbd_transport_ops *ops;
143 };
144
145 #define KSMBD_TCP_RECV_TIMEOUT (7 * HZ)
146 #define KSMBD_TCP_SEND_TIMEOUT (5 * HZ)
147 #define KSMBD_TCP_PEER_SOCKADDR(c) ((struct sockaddr *)&((c)->peer_addr))
148
149 extern struct list_head conn_list;
150 extern struct rw_semaphore conn_list_lock;
151
152 bool ksmbd_conn_alive(struct ksmbd_conn *conn);
153 void ksmbd_conn_wait_idle(struct ksmbd_conn *conn);
154 int ksmbd_conn_wait_idle_sess_id(struct ksmbd_conn *curr_conn, u64 sess_id);
155 struct ksmbd_conn *ksmbd_conn_alloc(void);
156 void ksmbd_conn_free(struct ksmbd_conn *conn);
157 bool ksmbd_conn_lookup_dialect(struct ksmbd_conn *c);
158 int ksmbd_conn_write(struct ksmbd_work *work);
159 int ksmbd_conn_rdma_read(struct ksmbd_conn *conn,
160 void *buf, unsigned int buflen,
161 struct smb2_buffer_desc_v1 *desc,
162 unsigned int desc_len);
163 int ksmbd_conn_rdma_write(struct ksmbd_conn *conn,
164 void *buf, unsigned int buflen,
165 struct smb2_buffer_desc_v1 *desc,
166 unsigned int desc_len);
167 void ksmbd_conn_enqueue_request(struct ksmbd_work *work);
168 void ksmbd_conn_try_dequeue_request(struct ksmbd_work *work);
169 void ksmbd_conn_init_server_callbacks(struct ksmbd_conn_ops *ops);
170 int ksmbd_conn_handler_loop(void *p);
171 int ksmbd_conn_transport_init(void);
172 void ksmbd_conn_transport_destroy(void);
173 void ksmbd_conn_lock(struct ksmbd_conn *conn);
174 void ksmbd_conn_unlock(struct ksmbd_conn *conn);
175 void ksmbd_conn_r_count_inc(struct ksmbd_conn *conn);
176 void ksmbd_conn_r_count_dec(struct ksmbd_conn *conn);
177
178 /*
179 * WARNING
180 *
181 * This is a hack. We will move status to a proper place once we land
182 * a multi-sessions support.
183 */
ksmbd_conn_good(struct ksmbd_conn * conn)184 static inline bool ksmbd_conn_good(struct ksmbd_conn *conn)
185 {
186 return READ_ONCE(conn->status) == KSMBD_SESS_GOOD;
187 }
188
ksmbd_conn_need_negotiate(struct ksmbd_conn * conn)189 static inline bool ksmbd_conn_need_negotiate(struct ksmbd_conn *conn)
190 {
191 return READ_ONCE(conn->status) == KSMBD_SESS_NEED_NEGOTIATE;
192 }
193
ksmbd_conn_need_setup(struct ksmbd_conn * conn)194 static inline bool ksmbd_conn_need_setup(struct ksmbd_conn *conn)
195 {
196 return READ_ONCE(conn->status) == KSMBD_SESS_NEED_SETUP;
197 }
198
ksmbd_conn_need_reconnect(struct ksmbd_conn * conn)199 static inline bool ksmbd_conn_need_reconnect(struct ksmbd_conn *conn)
200 {
201 return READ_ONCE(conn->status) == KSMBD_SESS_NEED_RECONNECT;
202 }
203
ksmbd_conn_exiting(struct ksmbd_conn * conn)204 static inline bool ksmbd_conn_exiting(struct ksmbd_conn *conn)
205 {
206 return READ_ONCE(conn->status) == KSMBD_SESS_EXITING;
207 }
208
ksmbd_conn_releasing(struct ksmbd_conn * conn)209 static inline bool ksmbd_conn_releasing(struct ksmbd_conn *conn)
210 {
211 return READ_ONCE(conn->status) == KSMBD_SESS_RELEASING;
212 }
213
ksmbd_conn_set_new(struct ksmbd_conn * conn)214 static inline void ksmbd_conn_set_new(struct ksmbd_conn *conn)
215 {
216 WRITE_ONCE(conn->status, KSMBD_SESS_NEW);
217 }
218
ksmbd_conn_set_good(struct ksmbd_conn * conn)219 static inline void ksmbd_conn_set_good(struct ksmbd_conn *conn)
220 {
221 WRITE_ONCE(conn->status, KSMBD_SESS_GOOD);
222 }
223
ksmbd_conn_set_need_negotiate(struct ksmbd_conn * conn)224 static inline void ksmbd_conn_set_need_negotiate(struct ksmbd_conn *conn)
225 {
226 WRITE_ONCE(conn->status, KSMBD_SESS_NEED_NEGOTIATE);
227 }
228
ksmbd_conn_set_need_setup(struct ksmbd_conn * conn)229 static inline void ksmbd_conn_set_need_setup(struct ksmbd_conn *conn)
230 {
231 WRITE_ONCE(conn->status, KSMBD_SESS_NEED_SETUP);
232 }
233
ksmbd_conn_set_need_reconnect(struct ksmbd_conn * conn)234 static inline void ksmbd_conn_set_need_reconnect(struct ksmbd_conn *conn)
235 {
236 WRITE_ONCE(conn->status, KSMBD_SESS_NEED_RECONNECT);
237 }
238
ksmbd_conn_set_exiting(struct ksmbd_conn * conn)239 static inline void ksmbd_conn_set_exiting(struct ksmbd_conn *conn)
240 {
241 WRITE_ONCE(conn->status, KSMBD_SESS_EXITING);
242 }
243
ksmbd_conn_set_releasing(struct ksmbd_conn * conn)244 static inline void ksmbd_conn_set_releasing(struct ksmbd_conn *conn)
245 {
246 WRITE_ONCE(conn->status, KSMBD_SESS_RELEASING);
247 }
248
249 void ksmbd_all_conn_set_status(u64 sess_id, u32 status);
250 #endif /* __CONNECTION_H__ */
251