1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3 * Copyright (C) 2018 Samsung Electronics Co., Ltd.
4 *
5 * linux-ksmbd-devel@lists.sourceforge.net
6 */
7
8 #ifndef _LINUX_KSMBD_SERVER_H
9 #define _LINUX_KSMBD_SERVER_H
10
11 #include <linux/types.h>
12
13 /*
14 * This is a userspace ABI to communicate data between ksmbd and user IPC
15 * daemon using netlink. This is added to track and cache user account DB
16 * and share configuration info from userspace.
17 *
18 * - KSMBD_EVENT_HEARTBEAT_REQUEST(ksmbd_heartbeat)
19 * This event is to check whether user IPC daemon is alive. If user IPC
20 * daemon is dead, ksmbd keep existing connection till disconnecting and
21 * new connection will be denied.
22 *
23 * - KSMBD_EVENT_STARTING_UP(ksmbd_startup_request)
24 * This event is to receive the information that initializes the ksmbd
25 * server from the user IPC daemon and to start the server. The global
26 * section parameters are given from smb.conf as initialization
27 * information.
28 *
29 * - KSMBD_EVENT_SHUTTING_DOWN(ksmbd_shutdown_request)
30 * This event is to shutdown ksmbd server.
31 *
32 * - KSMBD_EVENT_LOGIN_REQUEST/RESPONSE(ksmbd_login_request/response)
33 * This event is to get user account info to user IPC daemon.
34 *
35 * - KSMBD_EVENT_SHARE_CONFIG_REQUEST/RESPONSE(ksmbd_share_config_request/response)
36 * This event is to get net share configuration info.
37 *
38 * - KSMBD_EVENT_TREE_CONNECT_REQUEST/RESPONSE(ksmbd_tree_connect_request/response)
39 * This event is to get session and tree connect info.
40 *
41 * - KSMBD_EVENT_TREE_DISCONNECT_REQUEST(ksmbd_tree_disconnect_request)
42 * This event is to send tree disconnect info to user IPC daemon.
43 *
44 * - KSMBD_EVENT_LOGOUT_REQUEST(ksmbd_logout_request)
45 * This event is to send logout request to user IPC daemon.
46 *
47 * - KSMBD_EVENT_RPC_REQUEST/RESPONSE(ksmbd_rpc_command)
48 * This event is to make DCE/RPC request like srvsvc, wkssvc, lsarpc,
49 * samr to be processed in userspace.
50 *
51 * - KSMBD_EVENT_SPNEGO_AUTHEN_REQUEST/RESPONSE(ksmbd_spnego_authen_request/response)
52 * This event is to make kerberos authentication to be processed in
53 * userspace.
54 *
55 * - KSMBD_EVENT_LOGIN_REQUEST_EXT/RESPONSE_EXT(ksmbd_login_request_ext/response_ext)
56 * This event is to get user account extension info to user IPC daemon.
57 */
58
59 #define KSMBD_GENL_NAME "SMBD_GENL"
60 #define KSMBD_GENL_VERSION 0x01
61
62 #define KSMBD_REQ_MAX_ACCOUNT_NAME_SZ 48
63 #define KSMBD_REQ_MAX_HASH_SZ 18
64 #define KSMBD_REQ_MAX_SHARE_NAME 64
65
66 /*
67 * IPC heartbeat frame to check whether user IPC daemon is alive.
68 */
69 struct ksmbd_heartbeat {
70 __u32 handle;
71 };
72
73 /*
74 * Global config flags.
75 */
76 #define KSMBD_GLOBAL_FLAG_INVALID (0)
77 #define KSMBD_GLOBAL_FLAG_SMB2_LEASES BIT(0)
78 #define KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION BIT(1)
79 #define KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL BIT(2)
80 #define KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION_OFF BIT(3)
81 #define KSMBD_GLOBAL_FLAG_DURABLE_HANDLE BIT(4)
82
83 /*
84 * IPC request for ksmbd server startup
85 */
86 struct ksmbd_startup_request {
87 __u32 flags; /* Flags for global config */
88 __s32 signing; /* Signing enabled */
89 __s8 min_prot[16]; /* The minimum SMB protocol version */
90 __s8 max_prot[16]; /* The maximum SMB protocol version */
91 __s8 netbios_name[16];
92 __s8 work_group[64]; /* Workgroup */
93 __s8 server_string[64]; /* Server string */
94 __u16 tcp_port; /* tcp port */
95 __u16 ipc_timeout; /*
96 * specifies the number of seconds
97 * server will wait for the userspace to
98 * reply to heartbeat frames.
99 */
100 __u32 deadtime; /* Number of minutes of inactivity */
101 __u32 file_max; /* Limits the maximum number of open files */
102 __u32 smb2_max_write; /* MAX write size */
103 __u32 smb2_max_read; /* MAX read size */
104 __u32 smb2_max_trans; /* MAX trans size */
105 __u32 share_fake_fscaps; /*
106 * Support some special application that
107 * makes QFSINFO calls to check whether
108 * we set the SPARSE_FILES bit (0x40).
109 */
110 __u32 sub_auth[3]; /* Subauth value for Security ID */
111 __u32 smb2_max_credits; /* MAX credits */
112 __u32 smbd_max_io_size; /* smbd read write size */
113 __u32 max_connections; /* Number of maximum simultaneous connections */
114 __s8 bind_interfaces_only;
115 __u32 max_ip_connections; /* Number of maximum connection per ip address */
116 __s8 reserved[499]; /* Reserved room */
117 __u32 ifc_list_sz; /* interfaces list size */
118 __s8 ____payload[];
119 } __packed;
120
121 #define KSMBD_STARTUP_CONFIG_INTERFACES(s) ((s)->____payload)
122
123 /*
124 * IPC request to shutdown ksmbd server.
125 */
126 struct ksmbd_shutdown_request {
127 __s32 reserved[16];
128 };
129
130 /*
131 * IPC user login request.
132 */
133 struct ksmbd_login_request {
134 __u32 handle;
135 __s8 account[KSMBD_REQ_MAX_ACCOUNT_NAME_SZ]; /* user account name */
136 __u32 reserved[16]; /* Reserved room */
137 };
138
139 /*
140 * IPC user login response.
141 */
142 struct ksmbd_login_response {
143 __u32 handle;
144 __u32 gid; /* group id */
145 __u32 uid; /* user id */
146 __s8 account[KSMBD_REQ_MAX_ACCOUNT_NAME_SZ]; /* user account name */
147 __u16 status;
148 __u16 hash_sz; /* hash size */
149 __s8 hash[KSMBD_REQ_MAX_HASH_SZ]; /* password hash */
150 __u32 reserved[16]; /* Reserved room */
151 };
152
153 /*
154 * IPC user login response extension.
155 */
156 struct ksmbd_login_response_ext {
157 __u32 handle;
158 __s32 ngroups; /* supplementary group count */
159 __s8 reserved[128]; /* Reserved room */
160 __s8 ____payload[];
161 };
162
163 /*
164 * IPC request to fetch net share config.
165 */
166 struct ksmbd_share_config_request {
167 __u32 handle;
168 __s8 share_name[KSMBD_REQ_MAX_SHARE_NAME]; /* share name */
169 __u32 reserved[16]; /* Reserved room */
170 };
171
172 /*
173 * IPC response to the net share config request.
174 */
175 struct ksmbd_share_config_response {
176 __u32 handle;
177 __u32 flags;
178 __u16 create_mask;
179 __u16 directory_mask;
180 __u16 force_create_mode;
181 __u16 force_directory_mode;
182 __u16 force_uid;
183 __u16 force_gid;
184 __s8 share_name[KSMBD_REQ_MAX_SHARE_NAME];
185 __u32 reserved[111]; /* Reserved room */
186 __u32 payload_sz;
187 __u32 veto_list_sz;
188 __s8 ____payload[];
189 };
190
191 #define KSMBD_SHARE_CONFIG_VETO_LIST(s) ((s)->____payload)
192
193 static inline char *
ksmbd_share_config_path(struct ksmbd_share_config_response * sc)194 ksmbd_share_config_path(struct ksmbd_share_config_response *sc)
195 {
196 char *p = sc->____payload;
197
198 if (sc->veto_list_sz)
199 p += sc->veto_list_sz + 1;
200
201 return p;
202 }
203
204 /*
205 * IPC request for tree connection. This request include session and tree
206 * connect info from client.
207 */
208 struct ksmbd_tree_connect_request {
209 __u32 handle;
210 __u16 account_flags;
211 __u16 flags;
212 __u64 session_id;
213 __u64 connect_id;
214 __s8 account[KSMBD_REQ_MAX_ACCOUNT_NAME_SZ];
215 __s8 share[KSMBD_REQ_MAX_SHARE_NAME];
216 __s8 peer_addr[64];
217 __u32 reserved[16]; /* Reserved room */
218 };
219
220 /*
221 * IPC Response structure for tree connection.
222 */
223 struct ksmbd_tree_connect_response {
224 __u32 handle;
225 __u16 status;
226 __u16 connection_flags;
227 __u32 reserved[16]; /* Reserved room */
228 };
229
230 /*
231 * IPC Request structure to disconnect tree connection.
232 */
233 struct ksmbd_tree_disconnect_request {
234 __u64 session_id; /* session id */
235 __u64 connect_id; /* tree connection id */
236 __u32 reserved[16]; /* Reserved room */
237 };
238
239 /*
240 * IPC Response structure to logout user account.
241 */
242 struct ksmbd_logout_request {
243 __s8 account[KSMBD_REQ_MAX_ACCOUNT_NAME_SZ]; /* user account name */
244 __u32 account_flags;
245 __u32 reserved[16]; /* Reserved room */
246 };
247
248 /*
249 * RPC command structure to send rpc request like srvsvc or wkssvc to
250 * IPC user daemon.
251 */
252 struct ksmbd_rpc_command {
253 __u32 handle;
254 __u32 flags;
255 __u32 payload_sz;
256 __u8 payload[];
257 };
258
259 /*
260 * IPC Request Kerberos authentication
261 */
262 struct ksmbd_spnego_authen_request {
263 __u32 handle;
264 __u16 spnego_blob_len; /* the length of spnego_blob */
265 __u8 spnego_blob[]; /*
266 * the GSS token from SecurityBuffer of
267 * SMB2 SESSION SETUP request
268 */
269 };
270
271 /*
272 * Response data which includes the GSS token and the session key generated by
273 * user daemon.
274 */
275 struct ksmbd_spnego_authen_response {
276 __u32 handle;
277 struct ksmbd_login_response login_response; /*
278 * the login response with
279 * a user identified by the
280 * GSS token from a client
281 */
282 __u16 session_key_len; /* the length of the session key */
283 __u16 spnego_blob_len; /*
284 * the length of the GSS token which will be
285 * stored in SecurityBuffer of SMB2 SESSION
286 * SETUP response
287 */
288 __u8 payload[]; /* session key + AP_REP */
289 };
290
291 /*
292 * This also used as NETLINK attribute type value.
293 *
294 * NOTE:
295 * Response message type value should be equal to
296 * request message type value + 1.
297 */
298 enum ksmbd_event {
299 KSMBD_EVENT_UNSPEC = 0,
300 KSMBD_EVENT_HEARTBEAT_REQUEST,
301
302 KSMBD_EVENT_STARTING_UP,
303 KSMBD_EVENT_SHUTTING_DOWN,
304
305 KSMBD_EVENT_LOGIN_REQUEST,
306 KSMBD_EVENT_LOGIN_RESPONSE = 5,
307
308 KSMBD_EVENT_SHARE_CONFIG_REQUEST,
309 KSMBD_EVENT_SHARE_CONFIG_RESPONSE,
310
311 KSMBD_EVENT_TREE_CONNECT_REQUEST,
312 KSMBD_EVENT_TREE_CONNECT_RESPONSE,
313
314 KSMBD_EVENT_TREE_DISCONNECT_REQUEST = 10,
315
316 KSMBD_EVENT_LOGOUT_REQUEST,
317
318 KSMBD_EVENT_RPC_REQUEST,
319 KSMBD_EVENT_RPC_RESPONSE,
320
321 KSMBD_EVENT_SPNEGO_AUTHEN_REQUEST,
322 KSMBD_EVENT_SPNEGO_AUTHEN_RESPONSE = 15,
323
324 KSMBD_EVENT_LOGIN_REQUEST_EXT,
325 KSMBD_EVENT_LOGIN_RESPONSE_EXT,
326
327 __KSMBD_EVENT_MAX,
328 KSMBD_EVENT_MAX = __KSMBD_EVENT_MAX - 1
329 };
330
331 /*
332 * Enumeration for IPC tree connect status.
333 */
334 enum KSMBD_TREE_CONN_STATUS {
335 KSMBD_TREE_CONN_STATUS_OK = 0,
336 KSMBD_TREE_CONN_STATUS_NOMEM,
337 KSMBD_TREE_CONN_STATUS_NO_SHARE,
338 KSMBD_TREE_CONN_STATUS_NO_USER,
339 KSMBD_TREE_CONN_STATUS_INVALID_USER,
340 KSMBD_TREE_CONN_STATUS_HOST_DENIED = 5,
341 KSMBD_TREE_CONN_STATUS_CONN_EXIST,
342 KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS,
343 KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS,
344 KSMBD_TREE_CONN_STATUS_ERROR,
345 };
346
347 /*
348 * User config flags.
349 */
350 #define KSMBD_USER_FLAG_INVALID (0)
351 #define KSMBD_USER_FLAG_OK BIT(0)
352 #define KSMBD_USER_FLAG_BAD_PASSWORD BIT(1)
353 #define KSMBD_USER_FLAG_BAD_UID BIT(2)
354 #define KSMBD_USER_FLAG_BAD_USER BIT(3)
355 #define KSMBD_USER_FLAG_GUEST_ACCOUNT BIT(4)
356 #define KSMBD_USER_FLAG_DELAY_SESSION BIT(5)
357 #define KSMBD_USER_FLAG_EXTENSION BIT(6)
358
359 /*
360 * Share config flags.
361 */
362 #define KSMBD_SHARE_FLAG_INVALID (0)
363 #define KSMBD_SHARE_FLAG_AVAILABLE BIT(0)
364 #define KSMBD_SHARE_FLAG_BROWSEABLE BIT(1)
365 #define KSMBD_SHARE_FLAG_WRITEABLE BIT(2)
366 #define KSMBD_SHARE_FLAG_READONLY BIT(3)
367 #define KSMBD_SHARE_FLAG_GUEST_OK BIT(4)
368 #define KSMBD_SHARE_FLAG_GUEST_ONLY BIT(5)
369 #define KSMBD_SHARE_FLAG_STORE_DOS_ATTRS BIT(6)
370 #define KSMBD_SHARE_FLAG_OPLOCKS BIT(7)
371 #define KSMBD_SHARE_FLAG_PIPE BIT(8)
372 #define KSMBD_SHARE_FLAG_HIDE_DOT_FILES BIT(9)
373 #define KSMBD_SHARE_FLAG_INHERIT_OWNER BIT(10)
374 #define KSMBD_SHARE_FLAG_STREAMS BIT(11)
375 #define KSMBD_SHARE_FLAG_FOLLOW_SYMLINKS BIT(12)
376 #define KSMBD_SHARE_FLAG_ACL_XATTR BIT(13)
377 #define KSMBD_SHARE_FLAG_UPDATE BIT(14)
378 #define KSMBD_SHARE_FLAG_CROSSMNT BIT(15)
379 #define KSMBD_SHARE_FLAG_CONTINUOUS_AVAILABILITY BIT(16)
380
381 /*
382 * Tree connect request flags.
383 */
384 #define KSMBD_TREE_CONN_FLAG_REQUEST_SMB1 (0)
385 #define KSMBD_TREE_CONN_FLAG_REQUEST_IPV6 BIT(0)
386 #define KSMBD_TREE_CONN_FLAG_REQUEST_SMB2 BIT(1)
387
388 /*
389 * Tree connect flags.
390 */
391 #define KSMBD_TREE_CONN_FLAG_GUEST_ACCOUNT BIT(0)
392 #define KSMBD_TREE_CONN_FLAG_READ_ONLY BIT(1)
393 #define KSMBD_TREE_CONN_FLAG_WRITABLE BIT(2)
394 #define KSMBD_TREE_CONN_FLAG_ADMIN_ACCOUNT BIT(3)
395 #define KSMBD_TREE_CONN_FLAG_UPDATE BIT(4)
396
397 /*
398 * RPC over IPC.
399 */
400 #define KSMBD_RPC_METHOD_RETURN BIT(0)
401 #define KSMBD_RPC_SRVSVC_METHOD_INVOKE BIT(1)
402 #define KSMBD_RPC_SRVSVC_METHOD_RETURN (KSMBD_RPC_SRVSVC_METHOD_INVOKE | KSMBD_RPC_METHOD_RETURN)
403 #define KSMBD_RPC_WKSSVC_METHOD_INVOKE BIT(2)
404 #define KSMBD_RPC_WKSSVC_METHOD_RETURN (KSMBD_RPC_WKSSVC_METHOD_INVOKE | KSMBD_RPC_METHOD_RETURN)
405 #define KSMBD_RPC_IOCTL_METHOD (BIT(3) | KSMBD_RPC_METHOD_RETURN)
406 #define KSMBD_RPC_OPEN_METHOD BIT(4)
407 #define KSMBD_RPC_WRITE_METHOD BIT(5)
408 #define KSMBD_RPC_READ_METHOD (BIT(6) | KSMBD_RPC_METHOD_RETURN)
409 #define KSMBD_RPC_CLOSE_METHOD BIT(7)
410 #define KSMBD_RPC_RAP_METHOD (BIT(8) | KSMBD_RPC_METHOD_RETURN)
411 #define KSMBD_RPC_RESTRICTED_CONTEXT BIT(9)
412 #define KSMBD_RPC_SAMR_METHOD_INVOKE BIT(10)
413 #define KSMBD_RPC_SAMR_METHOD_RETURN (KSMBD_RPC_SAMR_METHOD_INVOKE | KSMBD_RPC_METHOD_RETURN)
414 #define KSMBD_RPC_LSARPC_METHOD_INVOKE BIT(11)
415 #define KSMBD_RPC_LSARPC_METHOD_RETURN (KSMBD_RPC_LSARPC_METHOD_INVOKE | KSMBD_RPC_METHOD_RETURN)
416
417 /*
418 * RPC status definitions.
419 */
420 #define KSMBD_RPC_OK 0
421 #define KSMBD_RPC_EBAD_FUNC 0x00000001
422 #define KSMBD_RPC_EACCESS_DENIED 0x00000005
423 #define KSMBD_RPC_EBAD_FID 0x00000006
424 #define KSMBD_RPC_ENOMEM 0x00000008
425 #define KSMBD_RPC_EBAD_DATA 0x0000000D
426 #define KSMBD_RPC_ENOTIMPLEMENTED 0x00000040
427 #define KSMBD_RPC_EINVALID_PARAMETER 0x00000057
428 #define KSMBD_RPC_EMORE_DATA 0x000000EA
429 #define KSMBD_RPC_EINVALID_LEVEL 0x0000007C
430 #define KSMBD_RPC_SOME_NOT_MAPPED 0x00000107
431
432 #define KSMBD_CONFIG_OPT_DISABLED 0
433 #define KSMBD_CONFIG_OPT_ENABLED 1
434 #define KSMBD_CONFIG_OPT_AUTO 2
435 #define KSMBD_CONFIG_OPT_MANDATORY 3
436
437 #endif /* _LINUX_KSMBD_SERVER_H */
438