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 char *request_buf;
50 struct ksmbd_transport *transport;
51 struct nls_table *local_nls;
52 struct unicode_map *um;
53 struct list_head conns_list;
54 struct rw_semaphore session_lock;
55 /* smb session 1 per user */
56 struct xarray sessions;
57 unsigned long last_active;
58 /* How many request are running currently */
59 atomic_t req_running;
60 /* References which are made for this Server object*/
61 atomic_t r_count;
62 unsigned int total_credits;
63 unsigned int outstanding_credits;
64 spinlock_t credits_lock;
65 wait_queue_head_t req_running_q;
66 wait_queue_head_t r_count_q;
67 /* Lock to protect requests list*/
68 spinlock_t request_lock;
69 struct list_head requests;
70 struct list_head async_requests;
71 int connection_type;
72 struct ksmbd_stats stats;
73 char ClientGUID[SMB2_CLIENT_GUID_SIZE];
74 struct ntlmssp_auth ntlmssp;
75
76 spinlock_t llist_lock;
77 struct list_head lock_list;
78
79 struct preauth_integrity_info *preauth_info;
80
81 bool need_neg;
82 unsigned int auth_mechs;
83 unsigned int preferred_auth_mech;
84 bool sign;
85 bool use_spnego:1;
86 __u16 cli_sec_mode;
87 __u16 srv_sec_mode;
88 /* dialect index that server chose */
89 __u16 dialect;
90
91 char *mechToken;
92 unsigned int mechTokenLen;
93
94 struct ksmbd_conn_ops *conn_ops;
95
96 /* Preauth Session Table */
97 struct list_head preauth_sess_table;
98
99 struct sockaddr_storage peer_addr;
100
101 /* Identifier for async message */
102 struct ida async_ida;
103
104 __le16 cipher_type;
105 __le16 compress_algorithm;
106 bool posix_ext_supported;
107 bool signing_negotiated;
108 __le16 signing_algorithm;
109 bool binding;
110 atomic_t refcnt;
111 };
112
113 struct ksmbd_conn_ops {
114 int (*process_fn)(struct ksmbd_conn *conn);
115 int (*terminate_fn)(struct ksmbd_conn *conn);
116 };
117
118 struct ksmbd_transport_ops {
119 int (*prepare)(struct ksmbd_transport *t);
120 void (*disconnect)(struct ksmbd_transport *t);
121 void (*shutdown)(struct ksmbd_transport *t);
122 int (*read)(struct ksmbd_transport *t, char *buf,
123 unsigned int size, int max_retries);
124 int (*writev)(struct ksmbd_transport *t, struct kvec *iovs, int niov,
125 int size, bool need_invalidate_rkey,
126 unsigned int remote_key);
127 int (*rdma_read)(struct ksmbd_transport *t,
128 void *buf, unsigned int len,
129 struct smb2_buffer_desc_v1 *desc,
130 unsigned int desc_len);
131 int (*rdma_write)(struct ksmbd_transport *t,
132 void *buf, unsigned int len,
133 struct smb2_buffer_desc_v1 *desc,
134 unsigned int desc_len);
135 };
136
137 struct ksmbd_transport {
138 struct ksmbd_conn *conn;
139 const struct ksmbd_transport_ops *ops;
140 };
141
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))
145
146 extern struct list_head conn_list;
147 extern struct rw_semaphore conn_list_lock;
148
149 bool ksmbd_conn_alive(struct ksmbd_conn *conn);
150 void ksmbd_conn_wait_idle(struct ksmbd_conn *conn);
151 int ksmbd_conn_wait_idle_sess_id(struct ksmbd_conn *curr_conn, u64 sess_id);
152 struct ksmbd_conn *ksmbd_conn_alloc(void);
153 void ksmbd_conn_free(struct ksmbd_conn *conn);
154 bool ksmbd_conn_lookup_dialect(struct ksmbd_conn *c);
155 int ksmbd_conn_write(struct ksmbd_work *work);
156 int ksmbd_conn_rdma_read(struct ksmbd_conn *conn,
157 void *buf, unsigned int buflen,
158 struct smb2_buffer_desc_v1 *desc,
159 unsigned int desc_len);
160 int ksmbd_conn_rdma_write(struct ksmbd_conn *conn,
161 void *buf, unsigned int buflen,
162 struct smb2_buffer_desc_v1 *desc,
163 unsigned int desc_len);
164 void ksmbd_conn_enqueue_request(struct ksmbd_work *work);
165 void ksmbd_conn_try_dequeue_request(struct ksmbd_work *work);
166 void ksmbd_conn_init_server_callbacks(struct ksmbd_conn_ops *ops);
167 int ksmbd_conn_handler_loop(void *p);
168 int ksmbd_conn_transport_init(void);
169 void ksmbd_conn_transport_destroy(void);
170 void ksmbd_conn_lock(struct ksmbd_conn *conn);
171 void ksmbd_conn_unlock(struct ksmbd_conn *conn);
172 void ksmbd_conn_r_count_inc(struct ksmbd_conn *conn);
173 void ksmbd_conn_r_count_dec(struct ksmbd_conn *conn);
174
175 /*
176 * WARNING
177 *
178 * This is a hack. We will move status to a proper place once we land
179 * a multi-sessions support.
180 */
ksmbd_conn_good(struct ksmbd_conn * conn)181 static inline bool ksmbd_conn_good(struct ksmbd_conn *conn)
182 {
183 return READ_ONCE(conn->status) == KSMBD_SESS_GOOD;
184 }
185
ksmbd_conn_need_negotiate(struct ksmbd_conn * conn)186 static inline bool ksmbd_conn_need_negotiate(struct ksmbd_conn *conn)
187 {
188 return READ_ONCE(conn->status) == KSMBD_SESS_NEED_NEGOTIATE;
189 }
190
ksmbd_conn_need_setup(struct ksmbd_conn * conn)191 static inline bool ksmbd_conn_need_setup(struct ksmbd_conn *conn)
192 {
193 return READ_ONCE(conn->status) == KSMBD_SESS_NEED_SETUP;
194 }
195
ksmbd_conn_need_reconnect(struct ksmbd_conn * conn)196 static inline bool ksmbd_conn_need_reconnect(struct ksmbd_conn *conn)
197 {
198 return READ_ONCE(conn->status) == KSMBD_SESS_NEED_RECONNECT;
199 }
200
ksmbd_conn_exiting(struct ksmbd_conn * conn)201 static inline bool ksmbd_conn_exiting(struct ksmbd_conn *conn)
202 {
203 return READ_ONCE(conn->status) == KSMBD_SESS_EXITING;
204 }
205
ksmbd_conn_releasing(struct ksmbd_conn * conn)206 static inline bool ksmbd_conn_releasing(struct ksmbd_conn *conn)
207 {
208 return READ_ONCE(conn->status) == KSMBD_SESS_RELEASING;
209 }
210
ksmbd_conn_set_new(struct ksmbd_conn * conn)211 static inline void ksmbd_conn_set_new(struct ksmbd_conn *conn)
212 {
213 WRITE_ONCE(conn->status, KSMBD_SESS_NEW);
214 }
215
ksmbd_conn_set_good(struct ksmbd_conn * conn)216 static inline void ksmbd_conn_set_good(struct ksmbd_conn *conn)
217 {
218 WRITE_ONCE(conn->status, KSMBD_SESS_GOOD);
219 }
220
ksmbd_conn_set_need_negotiate(struct ksmbd_conn * conn)221 static inline void ksmbd_conn_set_need_negotiate(struct ksmbd_conn *conn)
222 {
223 WRITE_ONCE(conn->status, KSMBD_SESS_NEED_NEGOTIATE);
224 }
225
ksmbd_conn_set_need_setup(struct ksmbd_conn * conn)226 static inline void ksmbd_conn_set_need_setup(struct ksmbd_conn *conn)
227 {
228 WRITE_ONCE(conn->status, KSMBD_SESS_NEED_SETUP);
229 }
230
ksmbd_conn_set_need_reconnect(struct ksmbd_conn * conn)231 static inline void ksmbd_conn_set_need_reconnect(struct ksmbd_conn *conn)
232 {
233 WRITE_ONCE(conn->status, KSMBD_SESS_NEED_RECONNECT);
234 }
235
ksmbd_conn_set_exiting(struct ksmbd_conn * conn)236 static inline void ksmbd_conn_set_exiting(struct ksmbd_conn *conn)
237 {
238 WRITE_ONCE(conn->status, KSMBD_SESS_EXITING);
239 }
240
ksmbd_conn_set_releasing(struct ksmbd_conn * conn)241 static inline void ksmbd_conn_set_releasing(struct ksmbd_conn *conn)
242 {
243 WRITE_ONCE(conn->status, KSMBD_SESS_RELEASING);
244 }
245
246 void ksmbd_all_conn_set_status(u64 sess_id, u32 status);
247 #endif /* __CONNECTION_H__ */
248