tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 bool is_aapl;
112};
113
114struct ksmbd_conn_ops {
115 int (*process_fn)(struct ksmbd_conn *conn);
116 int (*terminate_fn)(struct ksmbd_conn *conn);
117};
118
119struct ksmbd_transport_ops {
120 int (*prepare)(struct ksmbd_transport *t);
121 void (*disconnect)(struct ksmbd_transport *t);
122 void (*shutdown)(struct ksmbd_transport *t);
123 int (*read)(struct ksmbd_transport *t, char *buf,
124 unsigned int size, int max_retries);
125 int (*writev)(struct ksmbd_transport *t, struct kvec *iovs, int niov,
126 int size, bool need_invalidate_rkey,
127 unsigned int remote_key);
128 int (*rdma_read)(struct ksmbd_transport *t,
129 void *buf, unsigned int len,
130 struct smb2_buffer_desc_v1 *desc,
131 unsigned int desc_len);
132 int (*rdma_write)(struct ksmbd_transport *t,
133 void *buf, unsigned int len,
134 struct smb2_buffer_desc_v1 *desc,
135 unsigned int desc_len);
136 void (*free_transport)(struct ksmbd_transport *kt);
137};
138
139struct ksmbd_transport {
140 struct ksmbd_conn *conn;
141 const struct ksmbd_transport_ops *ops;
142};
143
144#define KSMBD_TCP_RECV_TIMEOUT (7 * HZ)
145#define KSMBD_TCP_SEND_TIMEOUT (5 * HZ)
146#define KSMBD_TCP_PEER_SOCKADDR(c) ((struct sockaddr *)&((c)->peer_addr))
147
148extern struct list_head conn_list;
149extern struct rw_semaphore conn_list_lock;
150
151bool ksmbd_conn_alive(struct ksmbd_conn *conn);
152void ksmbd_conn_wait_idle(struct ksmbd_conn *conn);
153int ksmbd_conn_wait_idle_sess_id(struct ksmbd_conn *curr_conn, u64 sess_id);
154struct ksmbd_conn *ksmbd_conn_alloc(void);
155void ksmbd_conn_free(struct ksmbd_conn *conn);
156bool ksmbd_conn_lookup_dialect(struct ksmbd_conn *c);
157int ksmbd_conn_write(struct ksmbd_work *work);
158int ksmbd_conn_rdma_read(struct ksmbd_conn *conn,
159 void *buf, unsigned int buflen,
160 struct smb2_buffer_desc_v1 *desc,
161 unsigned int desc_len);
162int ksmbd_conn_rdma_write(struct ksmbd_conn *conn,
163 void *buf, unsigned int buflen,
164 struct smb2_buffer_desc_v1 *desc,
165 unsigned int desc_len);
166void ksmbd_conn_enqueue_request(struct ksmbd_work *work);
167void ksmbd_conn_try_dequeue_request(struct ksmbd_work *work);
168void ksmbd_conn_init_server_callbacks(struct ksmbd_conn_ops *ops);
169int ksmbd_conn_handler_loop(void *p);
170int ksmbd_conn_transport_init(void);
171void ksmbd_conn_transport_destroy(void);
172void ksmbd_conn_lock(struct ksmbd_conn *conn);
173void ksmbd_conn_unlock(struct ksmbd_conn *conn);
174void ksmbd_conn_r_count_inc(struct ksmbd_conn *conn);
175void ksmbd_conn_r_count_dec(struct ksmbd_conn *conn);
176
177/*
178 * WARNING
179 *
180 * This is a hack. We will move status to a proper place once we land
181 * a multi-sessions support.
182 */
183static inline bool ksmbd_conn_good(struct ksmbd_conn *conn)
184{
185 return READ_ONCE(conn->status) == KSMBD_SESS_GOOD;
186}
187
188static inline bool ksmbd_conn_need_negotiate(struct ksmbd_conn *conn)
189{
190 return READ_ONCE(conn->status) == KSMBD_SESS_NEED_NEGOTIATE;
191}
192
193static inline bool ksmbd_conn_need_setup(struct ksmbd_conn *conn)
194{
195 return READ_ONCE(conn->status) == KSMBD_SESS_NEED_SETUP;
196}
197
198static inline bool ksmbd_conn_need_reconnect(struct ksmbd_conn *conn)
199{
200 return READ_ONCE(conn->status) == KSMBD_SESS_NEED_RECONNECT;
201}
202
203static inline bool ksmbd_conn_exiting(struct ksmbd_conn *conn)
204{
205 return READ_ONCE(conn->status) == KSMBD_SESS_EXITING;
206}
207
208static inline bool ksmbd_conn_releasing(struct ksmbd_conn *conn)
209{
210 return READ_ONCE(conn->status) == KSMBD_SESS_RELEASING;
211}
212
213static inline void ksmbd_conn_set_new(struct ksmbd_conn *conn)
214{
215 WRITE_ONCE(conn->status, KSMBD_SESS_NEW);
216}
217
218static inline void ksmbd_conn_set_good(struct ksmbd_conn *conn)
219{
220 WRITE_ONCE(conn->status, KSMBD_SESS_GOOD);
221}
222
223static inline void ksmbd_conn_set_need_negotiate(struct ksmbd_conn *conn)
224{
225 WRITE_ONCE(conn->status, KSMBD_SESS_NEED_NEGOTIATE);
226}
227
228static inline void ksmbd_conn_set_need_setup(struct ksmbd_conn *conn)
229{
230 WRITE_ONCE(conn->status, KSMBD_SESS_NEED_SETUP);
231}
232
233static inline void ksmbd_conn_set_need_reconnect(struct ksmbd_conn *conn)
234{
235 WRITE_ONCE(conn->status, KSMBD_SESS_NEED_RECONNECT);
236}
237
238static inline void ksmbd_conn_set_exiting(struct ksmbd_conn *conn)
239{
240 WRITE_ONCE(conn->status, KSMBD_SESS_EXITING);
241}
242
243static inline void ksmbd_conn_set_releasing(struct ksmbd_conn *conn)
244{
245 WRITE_ONCE(conn->status, KSMBD_SESS_RELEASING);
246}
247
248void ksmbd_all_conn_set_status(u64 sess_id, u32 status);
249#endif /* __CONNECTION_H__ */