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/inet.h>
11 #include <linux/ip.h>
12 #include <net/sock.h>
13 #include <net/tcp.h>
14 #include <net/inet_connection_sock.h>
15 #include <net/request_sock.h>
16 #include <linux/kthread.h>
17 #include <linux/nls.h>
18 #include <linux/unicode.h>
19 #include <linux/workqueue.h>
20
21 #include "smb_common.h"
22 #include "ksmbd_work.h"
23
24 struct smbdirect_buffer_descriptor_v1;
25
26 #define KSMBD_SOCKET_BACKLOG 16
27
28 enum {
29 KSMBD_SESS_NEW = 0,
30 KSMBD_SESS_GOOD,
31 KSMBD_SESS_EXITING,
32 KSMBD_SESS_NEED_RECONNECT,
33 KSMBD_SESS_NEED_NEGOTIATE,
34 KSMBD_SESS_NEED_SETUP,
35 KSMBD_SESS_RELEASING
36 };
37
38 struct ksmbd_conn_stats {
39 atomic_t open_files_count;
40 atomic64_t request_served;
41 };
42
43 struct ksmbd_transport;
44
45 struct ksmbd_conn {
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;
51 int status;
52 unsigned int cli_cap;
53 bool stop_called;
54 union {
55 __be32 inet_addr;
56 #if IS_ENABLED(CONFIG_IPV6)
57 u8 inet6_addr[16];
58 #endif
59 };
60 unsigned int inet_hash;
61 char *request_buf;
62 struct ksmbd_transport *transport;
63 struct nls_table *local_nls;
64 struct unicode_map *um;
65 struct hlist_node hlist;
66 struct rw_semaphore session_lock;
67 /* smb session 1 per user */
68 struct xarray sessions;
69 unsigned long last_active;
70 /* How many request are running currently */
71 atomic_t req_running;
72 /* References which are made for this Server object*/
73 atomic_t r_count;
74 unsigned int total_credits;
75 unsigned int outstanding_credits;
76 spinlock_t credits_lock;
77 wait_queue_head_t req_running_q;
78 wait_queue_head_t r_count_q;
79 /* Lock to protect requests list*/
80 spinlock_t request_lock;
81 struct list_head requests;
82 struct list_head async_requests;
83 int connection_type;
84 struct ksmbd_conn_stats stats;
85 char ClientGUID[SMB2_CLIENT_GUID_SIZE];
86 struct ntlmssp_auth ntlmssp;
87
88 spinlock_t llist_lock;
89 struct list_head lock_list;
90
91 struct preauth_integrity_info *preauth_info;
92
93 bool need_neg;
94 unsigned int auth_mechs;
95 unsigned int preferred_auth_mech;
96 bool sign;
97 bool use_spnego:1;
98 __u16 cli_sec_mode;
99 __u16 srv_sec_mode;
100 /* dialect index that server chose */
101 __u16 dialect;
102
103 char *mechToken;
104 unsigned int mechTokenLen;
105
106 struct ksmbd_conn_ops *conn_ops;
107
108 /* Preauth Session Table */
109 struct list_head preauth_sess_table;
110
111 struct sockaddr_storage peer_addr;
112
113 /* Identifier for async message */
114 struct ida async_ida;
115
116 __le16 cipher_type;
117 __le16 compress_algorithm;
118 bool posix_ext_supported;
119 bool signing_negotiated;
120 __le16 signing_algorithm;
121 bool binding;
122 atomic_t refcnt;
123 bool is_aapl;
124 struct work_struct release_work;
125 };
126
127 struct ksmbd_conn_ops {
128 int (*process_fn)(struct ksmbd_conn *conn);
129 int (*terminate_fn)(struct ksmbd_conn *conn);
130 };
131
132 struct ksmbd_transport_ops {
133 void (*disconnect)(struct ksmbd_transport *t);
134 void (*shutdown)(struct ksmbd_transport *t);
135 int (*read)(struct ksmbd_transport *t, char *buf,
136 unsigned int size, int max_retries);
137 int (*writev)(struct ksmbd_transport *t, struct kvec *iovs, int niov,
138 int size, bool need_invalidate_rkey,
139 unsigned int remote_key);
140 int (*rdma_read)(struct ksmbd_transport *t,
141 void *buf, unsigned int len,
142 struct smbdirect_buffer_descriptor_v1 *desc,
143 unsigned int desc_len);
144 int (*rdma_write)(struct ksmbd_transport *t,
145 void *buf, unsigned int len,
146 struct smbdirect_buffer_descriptor_v1 *desc,
147 unsigned int desc_len);
148 void (*free_transport)(struct ksmbd_transport *kt);
149 };
150
151 struct ksmbd_transport {
152 struct ksmbd_conn *conn;
153 const struct ksmbd_transport_ops *ops;
154 };
155
156 #define KSMBD_TCP_RECV_TIMEOUT (7 * HZ)
157 #define KSMBD_TCP_SEND_TIMEOUT (5 * HZ)
158 #define KSMBD_TCP_PEER_SOCKADDR(c) ((struct sockaddr *)&((c)->peer_addr))
159
160 #define CONN_HASH_BITS 12
161 extern DECLARE_HASHTABLE(conn_list, CONN_HASH_BITS);
162 extern struct rw_semaphore conn_list_lock;
163
164 bool ksmbd_conn_alive(struct ksmbd_conn *conn);
165 void ksmbd_conn_wait_idle(struct ksmbd_conn *conn);
166 int ksmbd_conn_wait_idle_sess_id(struct ksmbd_conn *curr_conn, u64 sess_id);
167 struct ksmbd_conn *ksmbd_conn_alloc(void);
168 void ksmbd_conn_free(struct ksmbd_conn *conn);
169 struct ksmbd_conn *ksmbd_conn_get(struct ksmbd_conn *conn);
170 void ksmbd_conn_put(struct ksmbd_conn *conn);
171 int ksmbd_conn_wq_init(void);
172 void ksmbd_conn_wq_destroy(void);
173 bool ksmbd_conn_lookup_dialect(struct ksmbd_conn *c);
174 int ksmbd_conn_write(struct ksmbd_work *work);
175 int ksmbd_conn_rdma_read(struct ksmbd_conn *conn,
176 void *buf, unsigned int buflen,
177 struct smbdirect_buffer_descriptor_v1 *desc,
178 unsigned int desc_len);
179 int ksmbd_conn_rdma_write(struct ksmbd_conn *conn,
180 void *buf, unsigned int buflen,
181 struct smbdirect_buffer_descriptor_v1 *desc,
182 unsigned int desc_len);
183 void ksmbd_conn_enqueue_request(struct ksmbd_work *work);
184 void ksmbd_conn_try_dequeue_request(struct ksmbd_work *work);
185 void ksmbd_conn_init_server_callbacks(struct ksmbd_conn_ops *ops);
186 int ksmbd_conn_handler_loop(void *p);
187 int ksmbd_conn_transport_init(void);
188 void ksmbd_conn_transport_destroy(void);
189 void ksmbd_conn_lock(struct ksmbd_conn *conn);
190 void ksmbd_conn_unlock(struct ksmbd_conn *conn);
191 void ksmbd_conn_r_count_inc(struct ksmbd_conn *conn);
192 void ksmbd_conn_r_count_dec(struct ksmbd_conn *conn);
193
194 /*
195 * WARNING
196 *
197 * This is a hack. We will move status to a proper place once we land
198 * a multi-sessions support.
199 */
ksmbd_conn_good(struct ksmbd_conn * conn)200 static inline bool ksmbd_conn_good(struct ksmbd_conn *conn)
201 {
202 return READ_ONCE(conn->status) == KSMBD_SESS_GOOD;
203 }
204
ksmbd_conn_need_negotiate(struct ksmbd_conn * conn)205 static inline bool ksmbd_conn_need_negotiate(struct ksmbd_conn *conn)
206 {
207 return READ_ONCE(conn->status) == KSMBD_SESS_NEED_NEGOTIATE;
208 }
209
ksmbd_conn_need_setup(struct ksmbd_conn * conn)210 static inline bool ksmbd_conn_need_setup(struct ksmbd_conn *conn)
211 {
212 return READ_ONCE(conn->status) == KSMBD_SESS_NEED_SETUP;
213 }
214
ksmbd_conn_need_reconnect(struct ksmbd_conn * conn)215 static inline bool ksmbd_conn_need_reconnect(struct ksmbd_conn *conn)
216 {
217 return READ_ONCE(conn->status) == KSMBD_SESS_NEED_RECONNECT;
218 }
219
ksmbd_conn_exiting(struct ksmbd_conn * conn)220 static inline bool ksmbd_conn_exiting(struct ksmbd_conn *conn)
221 {
222 return READ_ONCE(conn->status) == KSMBD_SESS_EXITING;
223 }
224
ksmbd_conn_releasing(struct ksmbd_conn * conn)225 static inline bool ksmbd_conn_releasing(struct ksmbd_conn *conn)
226 {
227 return READ_ONCE(conn->status) == KSMBD_SESS_RELEASING;
228 }
229
ksmbd_conn_set_new(struct ksmbd_conn * conn)230 static inline void ksmbd_conn_set_new(struct ksmbd_conn *conn)
231 {
232 WRITE_ONCE(conn->status, KSMBD_SESS_NEW);
233 }
234
ksmbd_conn_set_good(struct ksmbd_conn * conn)235 static inline void ksmbd_conn_set_good(struct ksmbd_conn *conn)
236 {
237 WRITE_ONCE(conn->status, KSMBD_SESS_GOOD);
238 }
239
ksmbd_conn_set_need_negotiate(struct ksmbd_conn * conn)240 static inline void ksmbd_conn_set_need_negotiate(struct ksmbd_conn *conn)
241 {
242 WRITE_ONCE(conn->status, KSMBD_SESS_NEED_NEGOTIATE);
243 }
244
ksmbd_conn_set_need_setup(struct ksmbd_conn * conn)245 static inline void ksmbd_conn_set_need_setup(struct ksmbd_conn *conn)
246 {
247 WRITE_ONCE(conn->status, KSMBD_SESS_NEED_SETUP);
248 }
249
ksmbd_conn_set_need_reconnect(struct ksmbd_conn * conn)250 static inline void ksmbd_conn_set_need_reconnect(struct ksmbd_conn *conn)
251 {
252 WRITE_ONCE(conn->status, KSMBD_SESS_NEED_RECONNECT);
253 }
254
ksmbd_conn_set_exiting(struct ksmbd_conn * conn)255 static inline void ksmbd_conn_set_exiting(struct ksmbd_conn *conn)
256 {
257 WRITE_ONCE(conn->status, KSMBD_SESS_EXITING);
258 }
259
ksmbd_conn_set_releasing(struct ksmbd_conn * conn)260 static inline void ksmbd_conn_set_releasing(struct ksmbd_conn *conn)
261 {
262 WRITE_ONCE(conn->status, KSMBD_SESS_RELEASING);
263 }
264
265 void ksmbd_all_conn_set_status(u64 sess_id, u32 status);
266 #endif /* __CONNECTION_H__ */
267