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