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Linux kernel mirror (for testing)
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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
24enum {
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
34struct ksmbd_stats {
35 atomic_t open_files_count;
36 atomic64_t request_served;
37};
38
39struct ksmbd_transport;
40
41struct 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 union {
50 __be32 inet_addr;
51#if IS_ENABLED(CONFIG_IPV6)
52 u8 inet6_addr[16];
53#endif
54 };
55 char *request_buf;
56 struct ksmbd_transport *transport;
57 struct nls_table *local_nls;
58 struct unicode_map *um;
59 struct list_head conns_list;
60 struct rw_semaphore session_lock;
61 /* smb session 1 per user */
62 struct xarray sessions;
63 unsigned long last_active;
64 /* How many request are running currently */
65 atomic_t req_running;
66 /* References which are made for this Server object*/
67 atomic_t r_count;
68 unsigned int total_credits;
69 unsigned int outstanding_credits;
70 spinlock_t credits_lock;
71 wait_queue_head_t req_running_q;
72 wait_queue_head_t r_count_q;
73 /* Lock to protect requests list*/
74 spinlock_t request_lock;
75 struct list_head requests;
76 struct list_head async_requests;
77 int connection_type;
78 struct ksmbd_stats stats;
79 char ClientGUID[SMB2_CLIENT_GUID_SIZE];
80 struct ntlmssp_auth ntlmssp;
81
82 spinlock_t llist_lock;
83 struct list_head lock_list;
84
85 struct preauth_integrity_info *preauth_info;
86
87 bool need_neg;
88 unsigned int auth_mechs;
89 unsigned int preferred_auth_mech;
90 bool sign;
91 bool use_spnego:1;
92 __u16 cli_sec_mode;
93 __u16 srv_sec_mode;
94 /* dialect index that server chose */
95 __u16 dialect;
96
97 char *mechToken;
98 unsigned int mechTokenLen;
99
100 struct ksmbd_conn_ops *conn_ops;
101
102 /* Preauth Session Table */
103 struct list_head preauth_sess_table;
104
105 struct sockaddr_storage peer_addr;
106
107 /* Identifier for async message */
108 struct ida async_ida;
109
110 __le16 cipher_type;
111 __le16 compress_algorithm;
112 bool posix_ext_supported;
113 bool signing_negotiated;
114 __le16 signing_algorithm;
115 bool binding;
116 atomic_t refcnt;
117 bool is_aapl;
118};
119
120struct ksmbd_conn_ops {
121 int (*process_fn)(struct ksmbd_conn *conn);
122 int (*terminate_fn)(struct ksmbd_conn *conn);
123};
124
125struct ksmbd_transport_ops {
126 int (*prepare)(struct ksmbd_transport *t);
127 void (*disconnect)(struct ksmbd_transport *t);
128 void (*shutdown)(struct ksmbd_transport *t);
129 int (*read)(struct ksmbd_transport *t, char *buf,
130 unsigned int size, int max_retries);
131 int (*writev)(struct ksmbd_transport *t, struct kvec *iovs, int niov,
132 int size, bool need_invalidate_rkey,
133 unsigned int remote_key);
134 int (*rdma_read)(struct ksmbd_transport *t,
135 void *buf, unsigned int len,
136 struct smb2_buffer_desc_v1 *desc,
137 unsigned int desc_len);
138 int (*rdma_write)(struct ksmbd_transport *t,
139 void *buf, unsigned int len,
140 struct smb2_buffer_desc_v1 *desc,
141 unsigned int desc_len);
142 void (*free_transport)(struct ksmbd_transport *kt);
143};
144
145struct ksmbd_transport {
146 struct ksmbd_conn *conn;
147 const struct ksmbd_transport_ops *ops;
148};
149
150#define KSMBD_TCP_RECV_TIMEOUT (7 * HZ)
151#define KSMBD_TCP_SEND_TIMEOUT (5 * HZ)
152#define KSMBD_TCP_PEER_SOCKADDR(c) ((struct sockaddr *)&((c)->peer_addr))
153
154extern struct list_head conn_list;
155extern struct rw_semaphore conn_list_lock;
156
157bool ksmbd_conn_alive(struct ksmbd_conn *conn);
158void ksmbd_conn_wait_idle(struct ksmbd_conn *conn);
159int ksmbd_conn_wait_idle_sess_id(struct ksmbd_conn *curr_conn, u64 sess_id);
160struct ksmbd_conn *ksmbd_conn_alloc(void);
161void ksmbd_conn_free(struct ksmbd_conn *conn);
162bool ksmbd_conn_lookup_dialect(struct ksmbd_conn *c);
163int ksmbd_conn_write(struct ksmbd_work *work);
164int ksmbd_conn_rdma_read(struct ksmbd_conn *conn,
165 void *buf, unsigned int buflen,
166 struct smb2_buffer_desc_v1 *desc,
167 unsigned int desc_len);
168int ksmbd_conn_rdma_write(struct ksmbd_conn *conn,
169 void *buf, unsigned int buflen,
170 struct smb2_buffer_desc_v1 *desc,
171 unsigned int desc_len);
172void ksmbd_conn_enqueue_request(struct ksmbd_work *work);
173void ksmbd_conn_try_dequeue_request(struct ksmbd_work *work);
174void ksmbd_conn_init_server_callbacks(struct ksmbd_conn_ops *ops);
175int ksmbd_conn_handler_loop(void *p);
176int ksmbd_conn_transport_init(void);
177void ksmbd_conn_transport_destroy(void);
178void ksmbd_conn_lock(struct ksmbd_conn *conn);
179void ksmbd_conn_unlock(struct ksmbd_conn *conn);
180void ksmbd_conn_r_count_inc(struct ksmbd_conn *conn);
181void ksmbd_conn_r_count_dec(struct ksmbd_conn *conn);
182
183/*
184 * WARNING
185 *
186 * This is a hack. We will move status to a proper place once we land
187 * a multi-sessions support.
188 */
189static inline bool ksmbd_conn_good(struct ksmbd_conn *conn)
190{
191 return READ_ONCE(conn->status) == KSMBD_SESS_GOOD;
192}
193
194static inline bool ksmbd_conn_need_negotiate(struct ksmbd_conn *conn)
195{
196 return READ_ONCE(conn->status) == KSMBD_SESS_NEED_NEGOTIATE;
197}
198
199static inline bool ksmbd_conn_need_setup(struct ksmbd_conn *conn)
200{
201 return READ_ONCE(conn->status) == KSMBD_SESS_NEED_SETUP;
202}
203
204static inline bool ksmbd_conn_need_reconnect(struct ksmbd_conn *conn)
205{
206 return READ_ONCE(conn->status) == KSMBD_SESS_NEED_RECONNECT;
207}
208
209static inline bool ksmbd_conn_exiting(struct ksmbd_conn *conn)
210{
211 return READ_ONCE(conn->status) == KSMBD_SESS_EXITING;
212}
213
214static inline bool ksmbd_conn_releasing(struct ksmbd_conn *conn)
215{
216 return READ_ONCE(conn->status) == KSMBD_SESS_RELEASING;
217}
218
219static inline void ksmbd_conn_set_new(struct ksmbd_conn *conn)
220{
221 WRITE_ONCE(conn->status, KSMBD_SESS_NEW);
222}
223
224static inline void ksmbd_conn_set_good(struct ksmbd_conn *conn)
225{
226 WRITE_ONCE(conn->status, KSMBD_SESS_GOOD);
227}
228
229static inline void ksmbd_conn_set_need_negotiate(struct ksmbd_conn *conn)
230{
231 WRITE_ONCE(conn->status, KSMBD_SESS_NEED_NEGOTIATE);
232}
233
234static inline void ksmbd_conn_set_need_setup(struct ksmbd_conn *conn)
235{
236 WRITE_ONCE(conn->status, KSMBD_SESS_NEED_SETUP);
237}
238
239static inline void ksmbd_conn_set_need_reconnect(struct ksmbd_conn *conn)
240{
241 WRITE_ONCE(conn->status, KSMBD_SESS_NEED_RECONNECT);
242}
243
244static inline void ksmbd_conn_set_exiting(struct ksmbd_conn *conn)
245{
246 WRITE_ONCE(conn->status, KSMBD_SESS_EXITING);
247}
248
249static inline void ksmbd_conn_set_releasing(struct ksmbd_conn *conn)
250{
251 WRITE_ONCE(conn->status, KSMBD_SESS_RELEASING);
252}
253
254void ksmbd_all_conn_set_status(u64 sess_id, u32 status);
255#endif /* __CONNECTION_H__ */