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