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 bool is_aapl;
112 };
113
114 struct ksmbd_conn_ops {
115 int (*process_fn)(struct ksmbd_conn *conn);
116 int (*terminate_fn)(struct ksmbd_conn *conn);
117 };
118
119 struct ksmbd_transport_ops {
120 int (*prepare)(struct ksmbd_transport *t);
121 void (*disconnect)(struct ksmbd_transport *t);
122 void (*shutdown)(struct ksmbd_transport *t);
123 int (*read)(struct ksmbd_transport *t, char *buf,
124 unsigned int size, int max_retries);
125 int (*writev)(struct ksmbd_transport *t, struct kvec *iovs, int niov,
126 int size, bool need_invalidate_rkey,
127 unsigned int remote_key);
128 int (*rdma_read)(struct ksmbd_transport *t,
129 void *buf, unsigned int len,
130 struct smb2_buffer_desc_v1 *desc,
131 unsigned int desc_len);
132 int (*rdma_write)(struct ksmbd_transport *t,
133 void *buf, unsigned int len,
134 struct smb2_buffer_desc_v1 *desc,
135 unsigned int desc_len);
136 void (*free_transport)(struct ksmbd_transport *kt);
137 };
138
139 struct ksmbd_transport {
140 struct ksmbd_conn *conn;
141 const struct ksmbd_transport_ops *ops;
142 };
143
144 #define KSMBD_TCP_RECV_TIMEOUT (7 * HZ)
145 #define KSMBD_TCP_SEND_TIMEOUT (5 * HZ)
146 #define KSMBD_TCP_PEER_SOCKADDR(c) ((struct sockaddr *)&((c)->peer_addr))
147
148 extern struct list_head conn_list;
149 extern struct rw_semaphore conn_list_lock;
150
151 bool ksmbd_conn_alive(struct ksmbd_conn *conn);
152 void ksmbd_conn_wait_idle(struct ksmbd_conn *conn);
153 int ksmbd_conn_wait_idle_sess_id(struct ksmbd_conn *curr_conn, u64 sess_id);
154 struct ksmbd_conn *ksmbd_conn_alloc(void);
155 void ksmbd_conn_free(struct ksmbd_conn *conn);
156 bool ksmbd_conn_lookup_dialect(struct ksmbd_conn *c);
157 int ksmbd_conn_write(struct ksmbd_work *work);
158 int ksmbd_conn_rdma_read(struct ksmbd_conn *conn,
159 void *buf, unsigned int buflen,
160 struct smb2_buffer_desc_v1 *desc,
161 unsigned int desc_len);
162 int ksmbd_conn_rdma_write(struct ksmbd_conn *conn,
163 void *buf, unsigned int buflen,
164 struct smb2_buffer_desc_v1 *desc,
165 unsigned int desc_len);
166 void ksmbd_conn_enqueue_request(struct ksmbd_work *work);
167 void ksmbd_conn_try_dequeue_request(struct ksmbd_work *work);
168 void ksmbd_conn_init_server_callbacks(struct ksmbd_conn_ops *ops);
169 int ksmbd_conn_handler_loop(void *p);
170 int ksmbd_conn_transport_init(void);
171 void ksmbd_conn_transport_destroy(void);
172 void ksmbd_conn_lock(struct ksmbd_conn *conn);
173 void ksmbd_conn_unlock(struct ksmbd_conn *conn);
174 void ksmbd_conn_r_count_inc(struct ksmbd_conn *conn);
175 void ksmbd_conn_r_count_dec(struct ksmbd_conn *conn);
176
177 /*
178 * WARNING
179 *
180 * This is a hack. We will move status to a proper place once we land
181 * a multi-sessions support.
182 */
ksmbd_conn_good(struct ksmbd_conn * conn)183 static inline bool ksmbd_conn_good(struct ksmbd_conn *conn)
184 {
185 return READ_ONCE(conn->status) == KSMBD_SESS_GOOD;
186 }
187
ksmbd_conn_need_negotiate(struct ksmbd_conn * conn)188 static inline bool ksmbd_conn_need_negotiate(struct ksmbd_conn *conn)
189 {
190 return READ_ONCE(conn->status) == KSMBD_SESS_NEED_NEGOTIATE;
191 }
192
ksmbd_conn_need_setup(struct ksmbd_conn * conn)193 static inline bool ksmbd_conn_need_setup(struct ksmbd_conn *conn)
194 {
195 return READ_ONCE(conn->status) == KSMBD_SESS_NEED_SETUP;
196 }
197
ksmbd_conn_need_reconnect(struct ksmbd_conn * conn)198 static inline bool ksmbd_conn_need_reconnect(struct ksmbd_conn *conn)
199 {
200 return READ_ONCE(conn->status) == KSMBD_SESS_NEED_RECONNECT;
201 }
202
ksmbd_conn_exiting(struct ksmbd_conn * conn)203 static inline bool ksmbd_conn_exiting(struct ksmbd_conn *conn)
204 {
205 return READ_ONCE(conn->status) == KSMBD_SESS_EXITING;
206 }
207
ksmbd_conn_releasing(struct ksmbd_conn * conn)208 static inline bool ksmbd_conn_releasing(struct ksmbd_conn *conn)
209 {
210 return READ_ONCE(conn->status) == KSMBD_SESS_RELEASING;
211 }
212
ksmbd_conn_set_new(struct ksmbd_conn * conn)213 static inline void ksmbd_conn_set_new(struct ksmbd_conn *conn)
214 {
215 WRITE_ONCE(conn->status, KSMBD_SESS_NEW);
216 }
217
ksmbd_conn_set_good(struct ksmbd_conn * conn)218 static inline void ksmbd_conn_set_good(struct ksmbd_conn *conn)
219 {
220 WRITE_ONCE(conn->status, KSMBD_SESS_GOOD);
221 }
222
ksmbd_conn_set_need_negotiate(struct ksmbd_conn * conn)223 static inline void ksmbd_conn_set_need_negotiate(struct ksmbd_conn *conn)
224 {
225 WRITE_ONCE(conn->status, KSMBD_SESS_NEED_NEGOTIATE);
226 }
227
ksmbd_conn_set_need_setup(struct ksmbd_conn * conn)228 static inline void ksmbd_conn_set_need_setup(struct ksmbd_conn *conn)
229 {
230 WRITE_ONCE(conn->status, KSMBD_SESS_NEED_SETUP);
231 }
232
ksmbd_conn_set_need_reconnect(struct ksmbd_conn * conn)233 static inline void ksmbd_conn_set_need_reconnect(struct ksmbd_conn *conn)
234 {
235 WRITE_ONCE(conn->status, KSMBD_SESS_NEED_RECONNECT);
236 }
237
ksmbd_conn_set_exiting(struct ksmbd_conn * conn)238 static inline void ksmbd_conn_set_exiting(struct ksmbd_conn *conn)
239 {
240 WRITE_ONCE(conn->status, KSMBD_SESS_EXITING);
241 }
242
ksmbd_conn_set_releasing(struct ksmbd_conn * conn)243 static inline void ksmbd_conn_set_releasing(struct ksmbd_conn *conn)
244 {
245 WRITE_ONCE(conn->status, KSMBD_SESS_RELEASING);
246 }
247
248 void ksmbd_all_conn_set_status(u64 sess_id, u32 status);
249 #endif /* __CONNECTION_H__ */
250