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